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authorThomas Bushnell <thomas@gnu.org>1999-04-26 05:58:44 +0000
committerThomas Bushnell <thomas@gnu.org>1999-04-26 05:58:44 +0000
commit86297c41a26f18d924e64fc93321c59cbc4c48dd (patch)
tree376954c6b95b735d361875319a1a2a9db6a27527 /linux/src/drivers/scsi/aic7xxx.c
parent851137902d3e7ad87af177487df3eea53e940a1c (diff)
1998-11-30 OKUJI Yoshinori <okuji@kuicr.kyoto-u.ac.jp>
Clean up linux emulation code to make it architecture-independent as much as possible. * linux: Renamed from linuxdev. * Makefile.in (objfiles): Add linux.o instead of linuxdev.o. (MAKE): New variable. Used for the linux.o target. * configure.in: Add AC_CHECK_TOOL(MAKE, make). * i386/i386/spl.h: Include <i386/ipl.h>, for compatibility with OSF Mach 3.0. Suggested by Elgin Lee <ehl@funghi.com>. * linux/src: Renamed from linux/linux. * linux/dev: Renamed from linux/mach. * linux/Drivers.in (AC_INIT): Use dev/include/linux/autoconf.h, instead of mach/include/linux/autoconf.h. * Makefile.in (all): Target ../linux.o instead of ../linuxdev.o. * linux/dev/drivers/block/genhd.c: Include <machine/spl.h> instead of <i386/ipl.h>. * linux/dev/drivers/net/auto_irq.c: Remove unneeded header files, <i386/ipl.h> and <i386/pic.h>. * linux/dev/init/main.c: Many i386-dependent codes moved to ... * linux/dev/arch/i386/irq.c: ... here. * linux/dev/arch/i386/setup.c: New file. * linux/dev/arch/i386/linux_emul.h: Likewise. * linux/dev/arch/i386/glue/timer.c: Merged into sched.c. * linux/dev/arch/i386/glue/sched.c: Include <machine/spl.h> instead of <i386/ipl.h>, and moved to ... * linux/dev/kernel/sched.c: ... here. * linux/dev/arch/i386/glue/block.c: Include <machine/spl.h> and <linux_emul.h>, instead of i386-dependent header files, and moved to ... * linux/dev/glue/blocl.c: ... here. * linux/dev/arch/i386/glue/net.c: Include <machine/spl.h> and <linux_emul.h>, instead of i386-dependent header files, and moved to ... * linux/dev/glue/net.c: ... here. * linux/dev/arch/i386/glue/misc.c: Remove `x86' and moved to ... * linux/dev/glue/misc.c: ... here. * linux/dev/arch/i386/glue/kmem.c: Moved to ... * linux/dev/glue/kmem.c: ... here.
Diffstat (limited to 'linux/src/drivers/scsi/aic7xxx.c')
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diff --git a/linux/src/drivers/scsi/aic7xxx.c b/linux/src/drivers/scsi/aic7xxx.c
new file mode 100644
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+++ b/linux/src/drivers/scsi/aic7xxx.c
@@ -0,0 +1,11300 @@
+/*+M*************************************************************************
+ * Adaptec AIC7xxx device driver for Linux.
+ *
+ * Copyright (c) 1994 John Aycock
+ * The University of Calgary Department of Computer Science.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; see the file COPYING. If not, write to
+ * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * Sources include the Adaptec 1740 driver (aha1740.c), the Ultrastor 24F
+ * driver (ultrastor.c), various Linux kernel source, the Adaptec EISA
+ * config file (!adp7771.cfg), the Adaptec AHA-2740A Series User's Guide,
+ * the Linux Kernel Hacker's Guide, Writing a SCSI Device Driver for Linux,
+ * the Adaptec 1542 driver (aha1542.c), the Adaptec EISA overlay file
+ * (adp7770.ovl), the Adaptec AHA-2740 Series Technical Reference Manual,
+ * the Adaptec AIC-7770 Data Book, the ANSI SCSI specification, the
+ * ANSI SCSI-2 specification (draft 10c), ...
+ *
+ * --------------------------------------------------------------------------
+ *
+ * Modifications by Daniel M. Eischen (deischen@iworks.InterWorks.org):
+ *
+ * Substantially modified to include support for wide and twin bus
+ * adapters, DMAing of SCBs, tagged queueing, IRQ sharing, bug fixes,
+ * SCB paging, and other rework of the code.
+ *
+ * Parts of this driver were also based on the FreeBSD driver by
+ * Justin T. Gibbs. His copyright follows:
+ *
+ * --------------------------------------------------------------------------
+ * Copyright (c) 1994-1997 Justin Gibbs.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification, immediately at the beginning of the file.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * Where this Software is combined with software released under the terms of
+ * the GNU Public License ("GPL") and the terms of the GPL would require the
+ * combined work to also be released under the terms of the GPL, the terms
+ * and conditions of this License will apply in addition to those of the
+ * GPL with the exception of any terms or conditions of this License that
+ * conflict with, or are expressly prohibited by, the GPL.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $Id: aic7xxx.c,v 1.1 1999/04/26 05:54:15 tb Exp $
+ *---------------------------------------------------------------------------
+ *
+ * Thanks also go to (in alphabetical order) the following:
+ *
+ * Rory Bolt - Sequencer bug fixes
+ * Jay Estabrook - Initial DEC Alpha support
+ * Doug Ledford - Much needed abort/reset bug fixes
+ * Kai Makisara - DMAing of SCBs
+ *
+ * A Boot time option was also added for not resetting the scsi bus.
+ *
+ * Form: aic7xxx=extended
+ * aic7xxx=no_reset
+ * aic7xxx=ultra
+ * aic7xxx=irq_trigger:[0,1] # 0 edge, 1 level
+ * aic7xxx=verbose
+ *
+ * Daniel M. Eischen, deischen@iworks.InterWorks.org, 1/23/97
+ *
+ * $Id: aic7xxx.c,v 1.1 1999/04/26 05:54:15 tb Exp $
+ *-M*************************************************************************/
+
+/*+M**************************************************************************
+ *
+ * Further driver modifications made by Doug Ledford <dledford@redhat.com>
+ *
+ * Copyright (c) 1997-1998 Doug Ledford
+ *
+ * These changes are released under the same licensing terms as the FreeBSD
+ * driver written by Justin Gibbs. Please see his Copyright notice above
+ * for the exact terms and conditions covering my changes as well as the
+ * warranty statement.
+ *
+ * Modifications made to the aic7xxx.c,v 4.1 driver from Dan Eischen include
+ * but are not limited to:
+ *
+ * 1: Import of the latest FreeBSD sequencer code for this driver
+ * 2: Modification of kernel code to accomodate different sequencer semantics
+ * 3: Extensive changes throughout kernel portion of driver to improve
+ * abort/reset processing and error hanndling
+ * 4: Other work contributed by various people on the Internet
+ * 5: Changes to printk information and verbosity selection code
+ * 6: General reliability related changes, especially in IRQ management
+ * 7: Modifications to the default probe/attach order for supported cards
+ * 8: SMP friendliness has been improved
+ *
+ * Overall, this driver represents a significant departure from the official
+ * aic7xxx driver released by Dan Eischen in two ways. First, in the code
+ * itself. A diff between the two version of the driver is now a several
+ * thousand line diff. Second, in approach to solving the same problem. The
+ * problem is importing the FreeBSD aic7xxx driver code to linux can be a
+ * difficult and time consuming process, that also can be error prone. Dan
+ * Eischen's official driver uses the approach that the linux and FreeBSD
+ * drivers should be as identical as possible. To that end, his next version
+ * of this driver will be using a mid-layer code library that he is developing
+ * to moderate communications between the linux mid-level SCSI code and the
+ * low level FreeBSD driver. He intends to be able to essentially drop the
+ * FreeBSD driver into the linux kernel with only a few minor tweaks to some
+ * include files and the like and get things working, making for fast easy
+ * imports of the FreeBSD code into linux.
+ *
+ * I disagree with Dan's approach. Not that I don't think his way of doing
+ * things would be nice, easy to maintain, and create a more uniform driver
+ * between FreeBSD and Linux. I have no objection to those issues. My
+ * disagreement is on the needed functionality. There simply are certain
+ * things that are done differently in FreeBSD than linux that will cause
+ * problems for this driver regardless of any middle ware Dan implements.
+ * The biggest example of this at the moment is interrupt semantics. Linux
+ * doesn't provide the same protection techniques as FreeBSD does, nor can
+ * they be easily implemented in any middle ware code since they would truly
+ * belong in the kernel proper and would effect all drivers. For the time
+ * being, I see issues such as these as major stumbling blocks to the
+ * reliability of code based upon such middle ware. Therefore, I choose to
+ * use a different approach to importing the FreeBSD code that doesn't
+ * involve any middle ware type code. My approach is to import the sequencer
+ * code from FreeBSD wholesale. Then, to only make changes in the kernel
+ * portion of the driver as they are needed for the new sequencer semantics.
+ * In this way, the portion of the driver that speaks to the rest of the
+ * linux kernel is fairly static and can be changed/modified to solve
+ * any problems one might encounter without concern for the FreeBSD driver.
+ *
+ * Note: If time and experience should prove me wrong that the middle ware
+ * code Dan writes is reliable in its operation, then I'll retract my above
+ * statements. But, for those that don't know, I'm from Missouri (in the US)
+ * and our state motto is "The Show-Me State". Well, before I will put
+ * faith into it, you'll have to show me that it works :)
+ *
+ *_M*************************************************************************/
+
+/*
+ * The next three defines are user configurable. These should be the only
+ * defines a user might need to get in here and change. There are other
+ * defines buried deeper in the code, but those really shouldn't need touched
+ * under normal conditions.
+ */
+
+/*
+ * AIC7XXX_FAKE_NEGOTIATION_CMDS
+ * We now have two distinctly different methods of device negotiation
+ * in this code. The two methods are selected by either defining or not
+ * defining this option. The difference is as follows:
+ *
+ * With AIC7XXX_FAKE_NEGOTIATION_CMDS not set (commented out)
+ * When the driver is in need of issuing a negotiation command for any
+ * given device, it will add the negotiation message on to part of a
+ * regular SCSI command for the device. In the process, if the device
+ * is configured for and using tagged queueing, then the code will
+ * also issue that single command as a non-tagged command, attach the
+ * negotiation message to that one command, and use a temporary
+ * queue depth of one to keep the untagged and tagged commands from
+ * overlapping.
+ * Pros: This doesn't use any extra SCB structures, it's simple, it
+ * works most of the time (if not all of the time now), and
+ * since we get the device capability info frmo the INQUIRY data
+ * now, shouldn't cause any problems.
+ * Cons: When we need to send a negotiation command to a device, we
+ * must use a command that is being sent to LUN 0 of the device.
+ * If we try sending one to high LUN numbers, then some devices
+ * get noticeably upset. Since we have to wait for a command with
+ * LUN == 0 to come along, we may not be able to renegotiate when
+ * we want if the user is actually using say LUN 1 of a CD Changer
+ * instead of using LUN 0 for an extended period of time.
+ *
+ * With AIC7XXX_FAKE_NEGOTIATION_CMDS defined
+ * When we need to negotiate with a device, instead of attaching our
+ * negotiation message to an existing command, we insert our own
+ * fictional Scsi_Cmnd into the chain that has the negotiation message
+ * attached to it. We send this one command as untagged regardless
+ * of the device type, and we fiddle with the queue depth the same as
+ * we would with the option unset to avoid overlapping commands. The
+ * primary difference between this and the unset option is that the
+ * negotiation message is no longer attached to a specific command,
+ * instead it is its own command and is merely triggered by a
+ * combination of both A) We need to negotiate and B) The mid level
+ * SCSI code has sent us a command. We still don't do any negotiation
+ * unless there is a valid SCSI command to be processed.
+ * Pros: This fixes the problem above in the Cons section. Since we
+ * issue our own fake command, we can set the LUN to 0 regardless
+ * of what the LUN is in the real command. It also means that if
+ * the device get's nasty over negotiation issues, it won't be
+ * showing up on a regular command, so we won't get any SENSE buffer
+ * data or STATUS_BYTE returns to the mid level code that are caused
+ * by snits in the negotiation code.
+ * Cons: We add more code, and more complexity. This means more ways
+ * in which things could break. It means a larger driver. It means
+ * more resource consumption for the fake commands. However, the
+ * biggest problem is this. Take a system where there is a CD-ROM
+ * on the SCSI bus. Someone has a CD in the CD-ROM and is using it.
+ * For some reason the SCSI bus gets reset. We don't touch the
+ * CD-ROM again for quite a period of time (so we don't renegotiate
+ * after the reset until we do touch the CD-ROM again). In the
+ * time while we aren't using the CD-ROM, the current disc is
+ * removed and a new one put in. When we go to check that disc, we
+ * will first have to renegotiate. In so doing, we issue our fake
+ * SCSI command, which happens to be TEST_UNIT_READY. The CD-ROM
+ * negotiates with us, then responds to our fake command with a
+ * CHECK_CONDITION status. We REQUEST_SENSE from the CD-ROM, it
+ * then sends the SENSE data to our fake command to tell it that
+ * it has been through a disc change. There, now we've cleared out
+ * the SENSE data along with our negotiation command, and when the
+ * real command executes, it won't pick up that the CD was changed.
+ * That's the biggest Con to this approach. In the future, I could
+ * probably code around this problem though, so this option is still
+ * viable.
+ *
+ * So, which command style should you use? I would appreciate it if people
+ * could try out both types. I want to know about any cases where one
+ * method works and the other doesn't. If one method works on significantly
+ * more systems than another, then it will become the default. If the second
+ * option turns out to work best, then I'll find a way to work around that
+ * big con I listed.
+ *
+ * -- July 7, 02:33
+ * OK...I just added some code that should make the Con listed for the
+ * fake commands a non issue now. However, it needs testing. For now,
+ * I'm going to make the default to use the fake commands, we'll see how
+ * it goes.
+ */
+
+#define AIC7XXX_FAKE_NEGOTIATION_CMDS
+
+/*
+ * AIC7XXX_STRICT_PCI_SETUP
+ * Should we assume the PCI config options on our controllers are set with
+ * sane and proper values, or should we be anal about our PCI config
+ * registers and force them to what we want? The main advantage to
+ * defining this option is on non-Intel hardware where the BIOS may not
+ * have been run to set things up, or if you have one of the BIOSless
+ * Adaptec controllers, such as a 2910, that don't get set up by the
+ * BIOS. However, keep in mind that we really do set the most important
+ * items in the driver regardless of this setting, this only controls some
+ * of the more esoteric PCI options on these cards. In that sense, I
+ * would default to leaving this off. However, if people wish to try
+ * things both ways, that would also help me to know if there are some
+ * machines where it works one way but not another.
+ *
+ * -- July 7, 17:09
+ * OK...I need this on my machine for testing, so the default is to
+ * leave it defined.
+ *
+ * -- July 7, 18:49
+ * I needed it for testing, but it didn't make any difference, so back
+ * off she goes.
+ *
+ * -- July 16, 23:04
+ * I turned it back on to try and compensate for the 2.1.x PCI code
+ * which no longer relies solely on the BIOS and now tries to set
+ * things itself.
+ */
+
+#define AIC7XXX_STRICT_PCI_SETUP
+
+/*
+ * AIC7XXX_VERBOSE_DEBUGGING
+ * This option enables a lot of extra printk();s in the code, surrounded
+ * by if (aic7xxx_verbose ...) statements. Executing all of those if
+ * statements and the extra checks can get to where it actually does have
+ * an impact on CPU usage and such, as well as code size. Disabling this
+ * define will keep some of those from becoming part of the code.
+ *
+ * NOTE: Currently, this option has no real effect, I will be adding the
+ * various #ifdef's in the code later when I've decided a section is
+ * complete and no longer needs debugging. OK...a lot of things are now
+ * surrounded by this define, so turning this off does have an impact.
+ */
+
+/*
+ * #define AIC7XXX_VERBOSE_DEBUGGING
+ */
+
+#if defined(MODULE) || defined(PCMCIA)
+#include <linux/module.h>
+#endif
+
+#if defined(PCMCIA)
+# undef MODULE
+#endif
+
+#include <stdarg.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/byteorder.h>
+#include <linux/version.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <linux/ioport.h>
+#include <linux/delay.h>
+#include <linux/sched.h>
+#include <linux/pci.h>
+#include <linux/proc_fs.h>
+#include <linux/blk.h>
+#include <linux/tqueue.h>
+#include <linux/tasks.h>
+#include "sd.h"
+#include "scsi.h"
+#include "hosts.h"
+#include "aic7xxx.h"
+
+#include "aic7xxx/sequencer.h"
+#include "aic7xxx/scsi_message.h"
+#include "aic7xxx_reg.h"
+
+#include <linux/stat.h>
+#include <linux/malloc.h> /* for kmalloc() */
+
+#include <linux/config.h> /* for CONFIG_PCI */
+
+/*
+ * To generate the correct addresses for the controller to issue
+ * on the bus. Originally added for DEC Alpha support.
+ */
+#define VIRT_TO_BUS(a) (unsigned int)virt_to_bus((void *)(a))
+
+struct proc_dir_entry proc_scsi_aic7xxx = {
+ PROC_SCSI_AIC7XXX, 7, "aic7xxx",
+ S_IFDIR | S_IRUGO | S_IXUGO, 2,
+ 0, 0, 0, NULL, NULL, NULL, NULL, NULL, NULL, NULL
+};
+
+#define AIC7XXX_C_VERSION "5.1.4"
+
+#define NUMBER(arr) (sizeof(arr) / sizeof(arr[0]))
+#define MIN(a,b) (((a) < (b)) ? (a) : (b))
+#define MAX(a,b) (((a) > (b)) ? (a) : (b))
+#define ALL_TARGETS -1
+#define ALL_CHANNELS -1
+#define ALL_LUNS -1
+#define MAX_TARGETS 16
+#define MAX_LUNS 8
+#ifndef TRUE
+# define TRUE 1
+#endif
+#ifndef FALSE
+# define FALSE 0
+#endif
+
+#ifndef KERNEL_VERSION
+# define KERNEL_VERSION(x,y,z) (((x)<<16)+((y)<<8)+(z))
+#endif
+
+/*
+ * We need the bios32.h file if we are kernel version 2.1.92 or less. The
+ * full set of pci_* changes wasn't in place until 2.1.93
+ */
+
+#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,1,92)
+# if defined(__sparc_v9__) || defined(__powerpc__)
+# error "PPC and Sparc platforms are only support under 2.1.92 and above"
+# endif
+# include <linux/bios32.h>
+#endif
+
+#if defined(__powerpc__)
+# define MMAPIO
+# ifdef mb
+# undef mb
+# endif
+# define mb() \
+ __asm__ __volatile__("eieio" ::: "memory")
+#elif defined(__i386__)
+# define MMAPIO
+# ifdef mb
+# undef mb
+# endif
+# define mb() \
+ __asm__ __volatile__("lock ; addl $0,0(%%esp)": : :"memory")
+#elif defined(__alpha__)
+# ifdef mb
+# undef mb
+# endif
+# define mb() \
+ __asm__ __volatile__("mb": : :"memory")
+#endif
+
+#if LINUX_VERSION_CODE > KERNEL_VERSION(2,1,0)
+# include <asm/spinlock.h>
+# include <linux/smp.h>
+# define cpuid smp_processor_id()
+# if LINUX_VERSION_CODE < KERNEL_VERSION(2,1,95)
+# define DRIVER_LOCK_INIT \
+ spin_lock_init(&p->spin_lock);
+# define DRIVER_LOCK \
+ if(!p->cpu_lock_count[cpuid]) { \
+ spin_lock_irqsave(&p->spin_lock, cpu_flags); \
+ p->cpu_lock_count[cpuid]++; \
+ } else { \
+ p->cpu_lock_count[cpuid]++; \
+ }
+# define DRIVER_UNLOCK \
+ if(--p->cpu_lock_count[cpuid] == 0) \
+ spin_unlock_irqrestore(&p->spin_lock, cpu_flags);
+# else
+# define DRIVER_LOCK_INIT
+# define DRIVER_LOCK
+# define DRIVER_UNLOCK
+# endif
+#else
+# define cpuid 0
+# define DRIVER_LOCK_INIT
+# define DRIVER_LOCK \
+ save_flags(cpu_flags); \
+ cli();
+# define DRIVER_UNLOCK \
+ restore_flags(cpu_flags);
+# define le32_to_cpu(x) (x)
+# define cpu_to_le32(x) (x)
+#endif
+
+/*
+ * You can try raising me if tagged queueing is enabled, or lowering
+ * me if you only have 4 SCBs.
+ */
+#ifdef CONFIG_AIC7XXX_CMDS_PER_LUN
+#define AIC7XXX_CMDS_PER_LUN CONFIG_AIC7XXX_CMDS_PER_LUN
+#endif
+
+/* Set this to the delay in seconds after SCSI bus reset. */
+#ifdef CONFIG_AIC7XXX_RESET_DELAY
+#define AIC7XXX_RESET_DELAY CONFIG_AIC7XXX_RESET_DELAY
+#else
+#define AIC7XXX_RESET_DELAY 5
+#endif
+
+/*
+ * Control collection of SCSI transfer statistics for the /proc filesystem.
+ *
+ * NOTE: Do NOT enable this when running on kernels version 1.2.x and below.
+ * NOTE: This does affect performance since it has to maintain statistics.
+ */
+#ifdef CONFIG_AIC7XXX_PROC_STATS
+#define AIC7XXX_PROC_STATS
+#endif
+
+/*
+ * NOTE: Uncommenting the define below no longer has any effect, the
+ * tagged queue value array is always active now. I've added
+ * a setup option to set this particular array and I'm hoping
+ * insmod will be smart enough to set it properly as well. It's
+ * by use of this array that a person can enable tagged queueing.
+ * The DEFAULT_TAG_COMMANDS define has been changed to disable
+ * tagged queueing by default, so if your devices can handle tagged
+ * queueing you will need to add a line to their lilo.conf file like:
+ * append="aic7xxx=verbose,tag_info:{{32,32,32,32},{32,32,32,32}}"
+ * which will result in the first four devices on the first two
+ * controllers being set to a tagged queue depth of 32.
+ *
+ * Set this for defining the number of tagged commands on a device
+ * by device, and controller by controller basis. The first set
+ * of tagged commands will be used for the first detected aic7xxx
+ * controller, the second set will be used for the second detected
+ * aic7xxx controller, and so on. These values will *only* be used
+ * for targets that are tagged queueing capable; these values will
+ * be ignored in all other cases. The tag_commands is an array of
+ * 16 to allow for wide and twin adapters. Twin adapters will use
+ * indexes 0-7 for channel 0, and indexes 8-15 for channel 1.
+ *
+ * *** Determining commands per LUN ***
+ *
+ * When AIC7XXX_CMDS_PER_LUN is not defined, the driver will use its
+ * own algorithm to determine the commands/LUN. If SCB paging is
+ * enabled, which is always now, the default is 8 commands per lun
+ * that indicates it supports tagged queueing. All non-tagged devices
+ * use an internal queue depth of 3, with no more than one of those
+ * three commands active at one time.
+ */
+/* #define AIC7XXX_TAGGED_QUEUEING_BY_DEVICE */
+
+typedef struct
+{
+ unsigned char tag_commands[16]; /* Allow for wide/twin adapters. */
+} adapter_tag_info_t;
+
+/*
+ * Make a define that will tell the driver not to use tagged queueing
+ * by default.
+ */
+#define DEFAULT_TAG_COMMANDS {255, 255, 255, 255, 255, 255, 255, 255,\
+ 255, 255, 255, 255, 255, 255, 255, 255}
+
+/*
+ * Modify this as you see fit for your system. By setting tag_commands
+ * to 0, the driver will use it's own algorithm for determining the
+ * number of commands to use (see above). When 255, the driver will
+ * not enable tagged queueing for that particular device. When positive
+ * (> 0) and (< 255) the values in the array are used for the queue_depth.
+ * Note that the maximum value for an entry is 254, but you're insane if
+ * you try to use that many commands on one device.
+ *
+ * In this example, the first line will disable tagged queueing for all
+ * the devices on the first probed aic7xxx adapter.
+ *
+ * The second line enables tagged queueing with 4 commands/LUN for IDs
+ * (1, 2-11, 13-15), disables tagged queueing for ID 12, and tells the
+ * driver to use its own algorithm for ID 1.
+ *
+ * The third line is the same as the first line.
+ *
+ * The fourth line disables tagged queueing for devices 0 and 3. It
+ * enables tagged queueing for the other IDs, with 16 commands/LUN
+ * for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for
+ * IDs 2, 5-7, and 9-15.
+ */
+
+/*
+ * NOTE: The below structure is for reference only, the actual structure
+ * to modify in order to change things is located around line
+ * number 1305
+adapter_tag_info_t aic7xxx_tag_info[] =
+{
+ {DEFAULT_TAG_COMMANDS},
+ {{4, 0, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 255, 4, 4, 4}},
+ {DEFAULT_TAG_COMMANDS},
+ {{255, 16, 4, 255, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}}
+};
+*/
+
+/*
+ * Define an array of board names that can be indexed by aha_type.
+ * Don't forget to change this when changing the types!
+ */
+static const char *board_names[] = {
+ "AIC-7xxx Unknown", /* AIC_NONE */
+ "Adaptec AIC-7810 Hardware RAID Controller", /* AIC_7810 */
+ "Adaptec AIC-7770 SCSI host adapter", /* AIC_7770 */
+ "Adaptec AHA-274X SCSI host adapter", /* AIC_7771 */
+ "Adaptec AHA-284X SCSI host adapter", /* AIC_284x */
+ "Adaptec AIC-7850 SCSI host adapter", /* AIC_7850 */
+ "Adaptec AIC-7855 SCSI host adapter", /* AIC_7855 */
+ "Adaptec AIC-7860 Ultra SCSI host adapter", /* AIC_7860 */
+ "Adaptec AHA-2940A Ultra SCSI host adapter", /* AIC_7861 */
+ "Adaptec AIC-7870 SCSI host adapter", /* AIC_7870 */
+ "Adaptec AHA-294X SCSI host adapter", /* AIC_7871 */
+ "Adaptec AHA-394X SCSI host adapter", /* AIC_7872 */
+ "Adaptec AHA-398X SCSI host adapter", /* AIC_7873 */
+ "Adaptec AHA-2944 SCSI host adapter", /* AIC_7874 */
+ "Adaptec AIC-7880 Ultra SCSI host adapter", /* AIC_7880 */
+ "Adaptec AHA-294X Ultra SCSI host adapter", /* AIC_7881 */
+ "Adaptec AHA-394X Ultra SCSI host adapter", /* AIC_7882 */
+ "Adaptec AHA-398X Ultra SCSI host adapter", /* AIC_7883 */
+ "Adaptec AHA-2944 Ultra SCSI host adapter", /* AIC_7884 */
+ "Adaptec AIC-7895 Ultra SCSI host adapter", /* AIC_7895 */
+ "Adaptec AIC-7890/1 Ultra2 SCSI host adapter", /* AIC_7890 */
+ "Adaptec AHA-294X Ultra2 SCSI host adapter", /* AIC_7890 */
+ "Adaptec AIC-7896/7 Ultra2 SCSI host adapter", /* AIC_7896 */
+ "Adaptec AHA-394X Ultra2 SCSI host adapter" /* AIC_7897 */
+};
+
+/*
+ * There should be a specific return value for this in scsi.h, but
+ * it seems that most drivers ignore it.
+ */
+#define DID_UNDERFLOW DID_ERROR
+
+/*
+ * What we want to do is have the higher level scsi driver requeue
+ * the command to us. There is no specific driver status for this
+ * condition, but the higher level scsi driver will requeue the
+ * command on a DID_BUS_BUSY error.
+ *
+ * Upon further inspection and testing, it seems that DID_BUS_BUSY
+ * will *always* retry the command. We can get into an infinite loop
+ * if this happens when we really want some sort of counter that
+ * will automatically abort/reset the command after so many retries.
+ * Using DID_ERROR will do just that. (Made by a suggestion by
+ * Doug Ledford 8/1/96)
+ */
+#define DID_RETRY_COMMAND DID_ERROR
+
+#define HSCSIID 0x07
+#define SCSI_RESET 0x040
+
+/*
+ * EISA/VL-bus stuff
+ */
+#define MINSLOT 1
+#define MAXSLOT 15
+#define SLOTBASE(x) ((x) << 12)
+#define BASE_TO_SLOT(x) ((x) >> 12)
+
+/*
+ * Standard EISA Host ID regs (Offset from slot base)
+ */
+#define AHC_HID0 0x80 /* 0,1: msb of ID2, 2-7: ID1 */
+#define AHC_HID1 0x81 /* 0-4: ID3, 5-7: LSB ID2 */
+#define AHC_HID2 0x82 /* product */
+#define AHC_HID3 0x83 /* firmware revision */
+
+/*
+ * AIC-7770 I/O range to reserve for a card
+ */
+#define MINREG 0xC00
+#define MAXREG 0xCBF
+
+#define INTDEF 0x5C /* Interrupt Definition Register */
+
+/*
+ * AIC-78X0 PCI registers
+ */
+#define CLASS_PROGIF_REVID 0x08
+#define DEVREVID 0x000000FFul
+#define PROGINFC 0x0000FF00ul
+#define SUBCLASS 0x00FF0000ul
+#define BASECLASS 0xFF000000ul
+
+#define CSIZE_LATTIME 0x0C
+#define CACHESIZE 0x0000003Ful /* only 5 bits */
+#define LATTIME 0x0000FF00ul
+
+#define DEVCONFIG 0x40
+#define SCBSIZE32 0x00010000ul /* aic789X only */
+#define MPORTMODE 0x00000400ul /* aic7870 only */
+#define RAMPSM 0x00000200ul /* aic7870 only */
+#define RAMPSM_ULTRA2 0x00000004
+#define VOLSENSE 0x00000100ul
+#define SCBRAMSEL 0x00000080ul
+#define SCBRAMSEL_ULTRA2 0x00000008
+#define MRDCEN 0x00000040ul
+#define EXTSCBTIME 0x00000020ul /* aic7870 only */
+#define EXTSCBPEN 0x00000010ul /* aic7870 only */
+#define BERREN 0x00000008ul
+#define DACEN 0x00000004ul
+#define STPWLEVEL 0x00000002ul
+#define DIFACTNEGEN 0x00000001ul /* aic7870 only */
+
+#define SCAMCTL 0x1a /* Ultra2 only */
+#define CCSCBBADDR 0xf0 /* aic7895/6/7 */
+
+/*
+ * Define the different types of SEEPROMs on aic7xxx adapters
+ * and make it also represent the address size used in accessing
+ * its registers. The 93C46 chips have 1024 bits organized into
+ * 64 16-bit words, while the 93C56 chips have 2048 bits organized
+ * into 128 16-bit words. The C46 chips use 6 bits to address
+ * each word, while the C56 and C66 (4096 bits) use 8 bits to
+ * address each word.
+ */
+typedef enum {C46 = 6, C56_66 = 8} seeprom_chip_type;
+
+/*
+ *
+ * Define the format of the SEEPROM registers (16 bits).
+ *
+ */
+struct seeprom_config {
+
+/*
+ * SCSI ID Configuration Flags
+ */
+#define CFXFER 0x0007 /* synchronous transfer rate */
+#define CFSYNCH 0x0008 /* enable synchronous transfer */
+#define CFDISC 0x0010 /* enable disconnection */
+#define CFWIDEB 0x0020 /* wide bus device (wide card) */
+#define CFSYNCHISULTRA 0x0040 /* CFSYNC is an ultra offset */
+#define CFNEWULTRAFORMAT 0x0080 /* Use the Ultra2 SEEPROM format */
+#define CFSTART 0x0100 /* send start unit SCSI command */
+#define CFINCBIOS 0x0200 /* include in BIOS scan */
+#define CFRNFOUND 0x0400 /* report even if not found */
+#define CFMULTILUN 0x0800 /* probe mult luns in BIOS scan */
+#define CFWBCACHEYES 0x4000 /* Enable W-Behind Cache on drive */
+#define CFWBCACHENC 0xc000 /* Don't change W-Behind Cache */
+/* UNUSED 0x3000 */
+ unsigned short device_flags[16]; /* words 0-15 */
+
+/*
+ * BIOS Control Bits
+ */
+#define CFSUPREM 0x0001 /* support all removable drives */
+#define CFSUPREMB 0x0002 /* support removable drives for boot only */
+#define CFBIOSEN 0x0004 /* BIOS enabled */
+/* UNUSED 0x0008 */
+#define CFSM2DRV 0x0010 /* support more than two drives */
+#define CF284XEXTEND 0x0020 /* extended translation (284x cards) */
+/* UNUSED 0x0040 */
+#define CFEXTEND 0x0080 /* extended translation enabled */
+/* UNUSED 0xFF00 */
+ unsigned short bios_control; /* word 16 */
+
+/*
+ * Host Adapter Control Bits
+ */
+#define CFAUTOTERM 0x0001 /* Perform Auto termination */
+#define CFULTRAEN 0x0002 /* Ultra SCSI speed enable (Ultra cards) */
+#define CF284XSELTO 0x0003 /* Selection timeout (284x cards) */
+#define CF284XFIFO 0x000C /* FIFO Threshold (284x cards) */
+#define CFSTERM 0x0004 /* SCSI low byte termination */
+#define CFWSTERM 0x0008 /* SCSI high byte termination (wide card) */
+#define CFSPARITY 0x0010 /* SCSI parity */
+#define CF284XSTERM 0x0020 /* SCSI low byte termination (284x cards) */
+#define CFRESETB 0x0040 /* reset SCSI bus at boot */
+#define CFBPRIMARY 0x0100 /* Channel B primary on 7895 chipsets */
+#define CFSEAUTOTERM 0x0400 /* aic7890 Perform SE Auto Term */
+#define CFLVDSTERM 0x0800 /* aic7890 LVD Termination */
+/* UNUSED 0xF280 */
+ unsigned short adapter_control; /* word 17 */
+
+/*
+ * Bus Release, Host Adapter ID
+ */
+#define CFSCSIID 0x000F /* host adapter SCSI ID */
+/* UNUSED 0x00F0 */
+#define CFBRTIME 0xFF00 /* bus release time */
+ unsigned short brtime_id; /* word 18 */
+
+/*
+ * Maximum targets
+ */
+#define CFMAXTARG 0x00FF /* maximum targets */
+/* UNUSED 0xFF00 */
+ unsigned short max_targets; /* word 19 */
+
+ unsigned short res_1[11]; /* words 20-30 */
+ unsigned short checksum; /* word 31 */
+};
+
+#define SELBUS_MASK 0x0a
+#define SELNARROW 0x00
+#define SELBUSB 0x08
+#define SINGLE_BUS 0x00
+
+#define SCB_TARGET(scb) \
+ (((scb)->hscb->target_channel_lun & TID) >> 4)
+#define SCB_LUN(scb) \
+ ((scb)->hscb->target_channel_lun & LID)
+#define SCB_IS_SCSIBUS_B(scb) \
+ (((scb)->hscb->target_channel_lun & SELBUSB) != 0)
+
+/*
+ * If an error occurs during a data transfer phase, run the command
+ * to completion - it's easier that way - making a note of the error
+ * condition in this location. This then will modify a DID_OK status
+ * into an appropriate error for the higher-level SCSI code.
+ */
+#define aic7xxx_error(cmd) ((cmd)->SCp.Status)
+
+/*
+ * Keep track of the targets returned status.
+ */
+#define aic7xxx_status(cmd) ((cmd)->SCp.sent_command)
+
+/*
+ * The position of the SCSI commands scb within the scb array.
+ */
+#define aic7xxx_position(cmd) ((cmd)->SCp.have_data_in)
+
+/*
+ * So we can keep track of our host structs
+ */
+static struct aic7xxx_host *first_aic7xxx = NULL;
+
+/*
+ * As of Linux 2.1, the mid-level SCSI code uses virtual addresses
+ * in the scatter-gather lists. We need to convert the virtual
+ * addresses to physical addresses.
+ */
+struct hw_scatterlist {
+ unsigned int address;
+ unsigned int length;
+};
+
+/*
+ * Maximum number of SG segments these cards can support.
+ */
+#define AIC7XXX_MAX_SG 128
+
+/*
+ * The maximum number of SCBs we could have for ANY type
+ * of card. DON'T FORGET TO CHANGE THE SCB MASK IN THE
+ * SEQUENCER CODE IF THIS IS MODIFIED!
+ */
+#define AIC7XXX_MAXSCB 255
+
+
+struct aic7xxx_hwscb {
+/* ------------ Begin hardware supported fields ---------------- */
+/* 0*/ unsigned char control;
+/* 1*/ unsigned char target_channel_lun; /* 4/1/3 bits */
+/* 2*/ unsigned char target_status;
+/* 3*/ unsigned char SG_segment_count;
+/* 4*/ unsigned int SG_list_pointer;
+/* 8*/ unsigned char residual_SG_segment_count;
+/* 9*/ unsigned char residual_data_count[3];
+/*12*/ unsigned int data_pointer;
+/*16*/ unsigned int data_count;
+/*20*/ unsigned int SCSI_cmd_pointer;
+/*24*/ unsigned char SCSI_cmd_length;
+/*25*/ unsigned char tag; /* Index into our kernel SCB array.
+ * Also used as the tag for tagged I/O
+ */
+#define SCB_PIO_TRANSFER_SIZE 26 /* amount we need to upload/download
+ * via PIO to initialize a transaction.
+ */
+/*26*/ unsigned char next; /* Used to thread SCBs awaiting selection
+ * or disconnected down in the sequencer.
+ */
+/*27*/ unsigned char prev;
+/*28*/ unsigned int pad; /*
+ * Unused by the kernel, but we require
+ * the padding so that the array of
+ * hardware SCBs is alligned on 32 byte
+ * boundaries so the sequencer can index
+ */
+};
+
+typedef enum {
+ SCB_FREE = 0x0000,
+ SCB_WAITINGQ = 0x0002,
+ SCB_ACTIVE = 0x0004,
+ SCB_SENSE = 0x0008,
+ SCB_ABORT = 0x0010,
+ SCB_DEVICE_RESET = 0x0020,
+ SCB_RESET = 0x0040,
+ SCB_RECOVERY_SCB = 0x0080,
+ SCB_WAS_BUSY = 0x0100,
+ SCB_MSGOUT_SENT = 0x0200,
+ SCB_MSGOUT_SDTR = 0x0400,
+ SCB_MSGOUT_WDTR = 0x0800,
+ SCB_MSGOUT_BITS = SCB_MSGOUT_SENT |
+ SCB_MSGOUT_SDTR |
+ SCB_MSGOUT_WDTR,
+ SCB_QUEUED_ABORT = 0x1000,
+ SCB_QUEUED_FOR_DONE = 0x2000
+} scb_flag_type;
+
+typedef enum {
+ AHC_FNONE = 0x00000000,
+ AHC_PAGESCBS = 0x00000001,
+ AHC_CHANNEL_B_PRIMARY = 0x00000002,
+ AHC_USEDEFAULTS = 0x00000004,
+ AHC_INDIRECT_PAGING = 0x00000008,
+ AHC_CHNLB = 0x00000020,
+ AHC_CHNLC = 0x00000040,
+ AHC_EXTEND_TRANS_A = 0x00000100,
+ AHC_EXTEND_TRANS_B = 0x00000200,
+ AHC_TERM_ENB_A = 0x00000400,
+ AHC_TERM_ENB_SE_LOW = 0x00000400,
+ AHC_TERM_ENB_B = 0x00000800,
+ AHC_TERM_ENB_SE_HIGH = 0x00000800,
+ AHC_HANDLING_REQINITS = 0x00001000,
+ AHC_TARGETMODE = 0x00002000,
+ AHC_NEWEEPROM_FMT = 0x00004000,
+ /*
+ * Here ends the FreeBSD defined flags and here begins the linux defined
+ * flags. NOTE: I did not preserve the old flag name during this change
+ * specifically to force me to evaluate what flags were being used properly
+ * and what flags weren't. This way, I could clean up the flag usage on
+ * a use by use basis. Doug Ledford
+ */
+ AHC_A_SCANNED = 0x00100000,
+ AHC_B_SCANNED = 0x00200000,
+ AHC_MULTI_CHANNEL = 0x00400000,
+ AHC_BIOS_ENABLED = 0x00800000,
+ AHC_SEEPROM_FOUND = 0x01000000,
+ AHC_TERM_ENB_LVD = 0x02000000,
+ AHC_ABORT_PENDING = 0x04000000,
+ AHC_RESET_PENDING = 0x08000000,
+#define AHC_IN_ISR_BIT 28
+ AHC_IN_ISR = 0x10000000,
+ AHC_IN_ABORT = 0x20000000,
+ AHC_IN_RESET = 0x40000000,
+ AHC_EXTERNAL_SRAM = 0x80000000
+} ahc_flag_type;
+
+typedef enum {
+ AHC_NONE = 0x0000,
+ AHC_CHIPID_MASK = 0x00ff,
+ AHC_AIC7770 = 0x0001,
+ AHC_AIC7850 = 0x0002,
+ AHC_AIC7860 = 0x0003,
+ AHC_AIC7870 = 0x0004,
+ AHC_AIC7880 = 0x0005,
+ AHC_AIC7890 = 0x0006,
+ AHC_AIC7895 = 0x0007,
+ AHC_AIC7896 = 0x0008,
+ AHC_VL = 0x0100,
+ AHC_EISA = 0x0200,
+ AHC_PCI = 0x0400,
+} ahc_chip;
+
+typedef enum {
+ AHC_FENONE = 0x0000,
+ AHC_ULTRA = 0x0001,
+ AHC_ULTRA2 = 0x0002,
+ AHC_WIDE = 0x0004,
+ AHC_TWIN = 0x0008,
+ AHC_MORE_SRAM = 0x0010,
+ AHC_CMD_CHAN = 0x0020,
+ AHC_QUEUE_REGS = 0x0040,
+ AHC_SG_PRELOAD = 0x0080,
+ AHC_SPIOCAP = 0x0100,
+ AHC_AIC7770_FE = AHC_FENONE,
+ AHC_AIC7850_FE = AHC_SPIOCAP,
+ AHC_AIC7860_FE = AHC_ULTRA|AHC_SPIOCAP,
+ AHC_AIC7870_FE = AHC_FENONE,
+ AHC_AIC7880_FE = AHC_ULTRA,
+ AHC_AIC7890_FE = AHC_MORE_SRAM|AHC_CMD_CHAN|AHC_ULTRA2|
+ AHC_QUEUE_REGS|AHC_SG_PRELOAD,
+ AHC_AIC7895_FE = AHC_MORE_SRAM|AHC_CMD_CHAN|AHC_ULTRA,
+ AHC_AIC7896_FE = AHC_AIC7890_FE,
+} ahc_feature;
+
+struct aic7xxx_scb {
+ struct aic7xxx_hwscb *hscb; /* corresponding hardware scb */
+ Scsi_Cmnd *cmd; /* Scsi_Cmnd for this scb */
+ struct aic7xxx_scb *q_next; /* next scb in queue */
+ volatile scb_flag_type flags; /* current state of scb */
+ struct hw_scatterlist *sg_list; /* SG list in adapter format */
+ void *kmalloc_ptr;
+ unsigned char tag_action;
+ unsigned char sg_count;
+ unsigned char sense_cmd[6]; /*
+ * Allocate 6 characters for
+ * sense command.
+ */
+ unsigned int sg_length; /* We init this during buildscb so we
+ * don't have to calculate anything
+ * during underflow/overflow/stat code
+ */
+};
+
+/*
+ * Define a linked list of SCBs.
+ */
+typedef struct {
+ struct aic7xxx_scb *head;
+ struct aic7xxx_scb *tail;
+} scb_queue_type;
+
+static struct {
+ unsigned char errno;
+ const char *errmesg;
+} hard_error[] = {
+ { ILLHADDR, "Illegal Host Access" },
+ { ILLSADDR, "Illegal Sequencer Address referenced" },
+ { ILLOPCODE, "Illegal Opcode in sequencer program" },
+ { SQPARERR, "Sequencer Ram Parity Error" },
+ { DPARERR, "Data-Path Ram Parity Error" },
+ { MPARERR, "Scratch Ram/SCB Array Ram Parity Error" },
+ { PCIERRSTAT,"PCI Error detected" },
+ { CIOPARERR, "CIOBUS Parity Error" }
+};
+
+static unsigned char
+generic_sense[] = { REQUEST_SENSE, 0, 0, 0, 255, 0 };
+
+typedef struct {
+ scb_queue_type free_scbs; /*
+ * SCBs assigned to free slot on
+ * card (no paging required)
+ */
+ struct aic7xxx_scb *scb_array[AIC7XXX_MAXSCB];
+ struct aic7xxx_hwscb *hscbs;
+ unsigned char numscbs; /* current number of scbs */
+ unsigned char maxhscbs; /* hardware scbs */
+ unsigned char maxscbs; /* max scbs including pageable scbs */
+ void *hscb_kmalloc_ptr;
+} scb_data_type;
+
+struct target_cmd {
+ unsigned char mesg_bytes[4];
+ unsigned char command[28];
+};
+
+#define AHC_TRANS_CUR 0x0001
+#define AHC_TRANS_ACTIVE 0x0002
+#define AHC_TRANS_GOAL 0x0004
+#define AHC_TRANS_USER 0x0008
+#define AHC_TRANS_QUITE 0x0010
+typedef struct {
+ unsigned char cur_width;
+ unsigned char goal_width;
+ unsigned char cur_period;
+ unsigned char goal_period;
+ unsigned char cur_offset;
+ unsigned char goal_offset;
+ unsigned char user_width;
+ unsigned char user_period;
+ unsigned char user_offset;
+} transinfo_type;
+
+/*
+ * Define a structure used for each host adapter. Note, in order to avoid
+ * problems with architectures I can't test on (because I don't have one,
+ * such as the Alpha based systems) which happen to give faults for
+ * non-aligned memory accesses, care was taken to align this structure
+ * in a way that gauranteed all accesses larger than 8 bits were aligned
+ * on the appropriate boundary. It's also organized to try and be more
+ * cache line efficient. Be careful when changing this lest you might hurt
+ * overall performance and bring down the wrath of the masses.
+ */
+struct aic7xxx_host {
+ /*
+ * This is the first 64 bytes in the host struct
+ */
+
+ struct Scsi_Host *host; /* pointer to scsi host */
+ struct aic7xxx_host *next; /* allow for multiple IRQs */
+ int host_no; /* SCSI host number */
+ unsigned long base; /* card base address */
+ volatile unsigned char *maddr; /* memory mapped address */
+ unsigned long mbase; /* I/O memory address */
+ volatile ahc_flag_type flags;
+#if LINUX_VERSION_CODE > KERNEL_VERSION(2,1,0)
+ spinlock_t spin_lock;
+#endif
+ volatile unsigned char cpu_lock_count[NR_CPUS];
+ ahc_chip chip; /* chip type */
+ ahc_feature features; /* chip features */
+ unsigned long last_reset;
+ unsigned long isr_count; /* Interrupt count */
+ unsigned long spurious_int;
+ struct target_cmd *targetcmds;
+ unsigned int num_targetcmds;
+ unsigned short discenable; /* Targets allowed to disconnect */
+ unsigned short tagenable; /* Targets using tagged I/O */
+ unsigned short orderedtag; /* Ordered Q tags allowed */
+ volatile unsigned char activescbs; /* active scbs */
+ volatile unsigned char max_activescbs;
+ unsigned char unpause; /* unpause value for HCNTRL */
+ unsigned char pause; /* pause value for HCNTRL */
+ volatile unsigned char qoutfifonext;
+ volatile unsigned char qinfifonext;
+
+ /*
+ * MAX_TARGETS is currently == 16, so that makes these entries the next
+ * 64 bytes
+ */
+
+#define DEVICE_PRESENT 0x01
+#define BUS_DEVICE_RESET_PENDING 0x02
+#define DEVICE_TIMEOUT 0x04
+#define DEVICE_PRINT_SDTR 0x08
+#define DEVICE_PRINT_WDTR 0x10
+#define DEVICE_SUCCESS 0x20
+#define DEVICE_TAGGED_SUCCESS 0x40
+#define DEVICE_SCANNED 0x80
+ volatile unsigned char dev_flags[MAX_TARGETS];
+ volatile unsigned char dev_active_cmds[MAX_TARGETS];
+ volatile unsigned char dev_temp_queue_depth[MAX_TARGETS];
+ unsigned char dev_commands_sent[MAX_TARGETS];
+
+ /*
+ * The next 128 (or 256 on 64 bit machines)....
+ */
+ Scsi_Cmnd *dev_wdtr_cmnd[MAX_TARGETS];
+ Scsi_Cmnd *dev_sdtr_cmnd[MAX_TARGETS];
+
+ /*
+ * The next 64....
+ */
+
+ long dev_last_reset[MAX_TARGETS];
+
+ /*
+ * The next 64....
+ */
+
+ unsigned char dev_mid_level_queue_depth[MAX_TARGETS];
+ unsigned char dev_last_queue_full[MAX_TARGETS];
+ unsigned char dev_last_queue_full_count[MAX_TARGETS];
+ unsigned char dev_max_queue_depth[MAX_TARGETS];
+
+ /*
+ * The next 128....
+ */
+
+ volatile scb_queue_type delayed_scbs[MAX_TARGETS];
+
+ /*
+ *
+ */
+
+ struct timer_list dev_timer[MAX_TARGETS];
+
+ /*
+ * The next 64....
+ */
+
+ unsigned char msg_buf[9]; /* The message for the target */
+ unsigned char msg_type;
+#define MSG_TYPE_NONE 0x00
+#define MSG_TYPE_INITIATOR_MSGOUT 0x01
+#define MSG_TYPE_INITIATOR_MSGIN 0x02
+ unsigned char msg_len; /* Length of message */
+ unsigned char msg_index; /* Index into msg_buf array */
+ transinfo_type transinfo[MAX_TARGETS];
+ volatile scb_queue_type waiting_scbs; /*
+ * SCBs waiting for space in
+ * the QINFIFO.
+ */
+ scb_data_type *scb_data;
+
+ struct aic7xxx_cmd_queue {
+ Scsi_Cmnd *head;
+ Scsi_Cmnd *tail;
+ } completeq;
+
+
+ /*
+ * We put the less frequently used host structure items after the more
+ * frequently used items to try and ease the burden on the cache subsystem.
+ * These entries are not *commonly* accessed, whereas the preceding entries
+ * are accessed very often. The only exceptions are the qinfifo, qoutfifo,
+ * and untagged_scbs array. But, they are often accessed only once and each
+ * access into these arrays is likely to blow a cache line, so they are put
+ * down here so we can minimize the number of cache lines required to hold
+ * the preceeding entries.
+ */
+
+ volatile unsigned char untagged_scbs[256];
+ volatile unsigned char qoutfifo[256];
+ volatile unsigned char qinfifo[256];
+ unsigned int irq; /* IRQ for this adapter */
+ volatile unsigned short needsdtr;
+ volatile unsigned short sdtr_pending;
+ volatile unsigned short needwdtr;
+ volatile unsigned short wdtr_pending;
+ int instance; /* aic7xxx instance number */
+ int scsi_id; /* host adapter SCSI ID */
+ int scsi_id_b; /* channel B for twin adapters */
+ unsigned int bios_address;
+ int board_name_index;
+ unsigned long reset_start;
+ unsigned short needsdtr_copy; /* default config */
+ unsigned short needwdtr_copy; /* default config */
+ unsigned short ultraenb; /* Ultra mode target list */
+ unsigned short bios_control; /* bios control - SEEPROM */
+ unsigned short adapter_control; /* adapter control - SEEPROM */
+#if LINUX_VERSION_CODE > KERNEL_VERSION(2,1,92)
+ struct pci_dev *pdev;
+#endif
+ unsigned char pci_bus;
+ unsigned char pci_device_fn;
+ struct seeprom_config sc;
+ unsigned short sc_type;
+ unsigned short sc_size;
+
+ /*
+ * Statistics Kept:
+ *
+ * Total Xfers (count for each command that has a data xfer),
+ * broken down further by reads && writes.
+ *
+ * Binned sizes, writes && reads:
+ * < 512, 512, 1-2K, 2-4K, 4-8K, 8-16K, 16-32K, 32-64K, 64K-128K, > 128K
+ *
+ * Total amounts read/written above 512 bytes (amts under ignored)
+ *
+ * NOTE: Enabling this feature is likely to cause a noticeable performance
+ * decrease as the accesses into the stats structures blows apart multiple
+ * cache lines and is CPU time consuming. We keep the xfer count always
+ * for use by the aic7xxx_proc.c code, but only do the bins if the
+ * proc stats code is enabled.
+ */
+ struct aic7xxx_xferstats {
+ long xfers; /* total xfer count */
+ long w_total; /* total writes */
+ long w_total512; /* 512 byte blocks written */
+ long r_total; /* total reads */
+ long r_total512; /* 512 byte blocks read */
+#ifdef AIC7XXX_PROC_STATS
+ long w_bins[10]; /* binned write */
+ long r_bins[10]; /* binned reads */
+#endif /* AIC7XXX_PROC_STATS */
+ } stats[MAX_TARGETS][MAX_LUNS]; /* [(channel << 3)|target][lun] */
+};
+
+/*
+ * Valid SCSIRATE values. (p. 3-17)
+ * Provides a mapping of transfer periods in ns/4 to the proper value to
+ * stick in the SCSIRATE reg to use that transfer rate.
+ */
+#define AHC_SYNCRATE_ULTRA2 0
+#define AHC_SYNCRATE_ULTRA 2
+#define AHC_SYNCRATE_FAST 5
+static struct aic7xxx_syncrate {
+ /* Rates in Ultra mode have bit 8 of sxfr set */
+#define ULTRA_SXFR 0x100
+ int sxfr_ultra2;
+ int sxfr;
+ unsigned char period;
+ const char *rate[2];
+} aic7xxx_syncrates[] = {
+ { 0x13, 0x000, 10, {"40.0", "80.0"} },
+ { 0x14, 0x000, 11, {"33.0", "66.6"} },
+ { 0x15, 0x100, 12, {"20.0", "40.0"} },
+ { 0x16, 0x110, 15, {"16.0", "32.0"} },
+ { 0x17, 0x120, 18, {"13.4", "26.8"} },
+ { 0x18, 0x000, 25, {"10.0", "20.0"} },
+ { 0x19, 0x010, 31, {"8.0", "16.0"} },
+ { 0x1a, 0x020, 37, {"6.67", "13.3"} },
+ { 0x1b, 0x030, 43, {"5.7", "11.4"} },
+ { 0x10, 0x040, 50, {"5.0", "10.0"} },
+ { 0x00, 0x050, 56, {"4.4", "8.8" } },
+ { 0x00, 0x060, 62, {"4.0", "8.0" } },
+ { 0x00, 0x070, 68, {"3.6", "7.2" } },
+ { 0x00, 0x000, 0, {NULL, NULL} },
+};
+
+#define CTL_OF_SCB(scb) (((scb->hscb)->target_channel_lun >> 3) & 0x1), \
+ (((scb->hscb)->target_channel_lun >> 4) & 0xf), \
+ ((scb->hscb)->target_channel_lun & 0x07)
+
+#define CTL_OF_CMD(cmd) ((cmd->channel) & 0x01), \
+ ((cmd->target) & 0x0f), \
+ ((cmd->lun) & 0x07)
+
+#define TARGET_INDEX(cmd) ((cmd)->target | ((cmd)->channel << 3))
+
+/*
+ * A nice little define to make doing our printks a little easier
+ */
+
+#define WARN_LEAD KERN_WARNING "(scsi%d:%d:%d:%d) "
+#define INFO_LEAD KERN_INFO "(scsi%d:%d:%d:%d) "
+
+/*
+ * XXX - these options apply unilaterally to _all_ 274x/284x/294x
+ * cards in the system. This should be fixed. Exceptions to this
+ * rule are noted in the comments.
+ */
+
+
+/*
+ * Skip the scsi bus reset. Non 0 make us skip the reset at startup. This
+ * has no effect on any later resets that might occur due to things like
+ * SCSI bus timeouts.
+ */
+static unsigned int aic7xxx_no_reset = 0;
+/*
+ * Certain PCI motherboards will scan PCI devices from highest to lowest,
+ * others scan from lowest to highest, and they tend to do all kinds of
+ * strange things when they come into contact with PCI bridge chips. The
+ * net result of all this is that the PCI card that is actually used to boot
+ * the machine is very hard to detect. Most motherboards go from lowest
+ * PCI slot number to highest, and the first SCSI controller found is the
+ * one you boot from. The only exceptions to this are when a controller
+ * has its BIOS disabled. So, we by default sort all of our SCSI controllers
+ * from lowest PCI slot number to highest PCI slot number. We also force
+ * all controllers with their BIOS disabled to the end of the list. This
+ * works on *almost* all computers. Where it doesn't work, we have this
+ * option. Setting this option to non-0 will reverse the order of the sort
+ * to highest first, then lowest, but will still leave cards with their BIOS
+ * disabled at the very end. That should fix everyone up unless there are
+ * really strange cirumstances.
+ */
+static int aic7xxx_reverse_scan = 0;
+/*
+ * This setting enables a hack to fix the IRQ settings on buggy 7895
+ * MB controller setups:
+ * -1 == Disable this hack
+ * 0 == Use the Channel A IRQ for both channels
+ * 1 == Use the Channel B IRQ for both channels
+ */
+static unsigned int aic7xxx_extended = 0;
+/*
+ * The IRQ trigger method used on EISA controllers. Does not effect PCI cards.
+ * -1 = Use detected settings.
+ * 0 = Force Edge triggered mode.
+ * 1 = Force Level triggered mode.
+ */
+static int aic7xxx_irq_trigger = -1;
+/*
+ * This variable is used to override the termination settings on a controller.
+ * This should not be used under normal conditions. However, in the case
+ * that a controller does not have a readable SEEPROM (so that we can't
+ * read the SEEPROM settings directly) and that a controller has a buggered
+ * version of the cable detection logic, this can be used to force the
+ * correct termination. It is preferable to use the manual termination
+ * settings in the BIOS if possible, but some motherboard controllers store
+ * those settings in a format we can't read. In other cases, auto term
+ * should also work, but the chipset was put together with no auto term
+ * logic (common on motherboard controllers). In those cases, we have
+ * 32 bits here to work with. That's good for 8 controllers/channels. The
+ * bits are organized as 4 bits per channel, with scsi0 getting the lowest
+ * 4 bits in the int. A 1 in a bit position indicates the termination setting
+ * that corresponds to that bit should be enabled, a 0 is disabled.
+ * It looks something like this:
+ *
+ * 0x0f = 1111-Single Ended Low Byte Termination on/off
+ * ||\-Single Ended High Byte Termination on/off
+ * |\-LVD Low Byte Termination on/off
+ * \-LVD High Byte Termination on/off
+ *
+ * For non-Ultra2 controllers, the upper 2 bits are not important. So, to
+ * enable both high byte and low byte termination on scsi0, I would need to
+ * make sure that the override_term variable was set to 0x03 (bits 0011).
+ * To make sure that all termination is enabled on an Ultra2 controller at
+ * scsi2 and only high byte termination on scsi1 and high and low byte
+ * termination on scsi0, I would set override_term=0xf23 (bits 1111 0010 0011)
+ *
+ * For the most part, users should never have to use this, that's why I
+ * left it fairly cryptic instead of easy to understand. If you need it,
+ * most likely someone will be telling you what your's needs to be set to.
+ */
+static int aic7xxx_override_term = -1;
+/*
+ * Certain motherboard chipset controllers tend to screw
+ * up the polarity of the term enable output pin. Use this variable
+ * to force the correct polarity for your system. This is a bitfield variable
+ * similar to the previous one, but this one has one bit per channel instead
+ * of four.
+ * 0 = Force the setting to active low.
+ * 1 = Force setting to active high.
+ * Most Adaptec cards are active high, several motherboards are active low.
+ * To force a 2940 card at SCSI 0 to active high and a motherboard 7895
+ * controller at scsi1 and scsi2 to active low, and a 2910 card at scsi3
+ * to active high, you would need to set stpwlev=0x9 (bits 1001).
+ *
+ * People shouldn't need to use this, but if you are experiencing lots of
+ * SCSI timeout problems, this may help. There is one sure way to test what
+ * this option needs to be. Using a boot floppy to boot the system, configure
+ * your system to enable all SCSI termination (in the Adaptec SCSI BIOS) and
+ * if needed then also pass a value to override_term to make sure that the
+ * driver is enabling SCSI termination, then set this variable to either 0
+ * or 1. When the driver boots, make sure there are *NO* SCSI cables
+ * connected to your controller. If it finds and inits the controller
+ * without problem, then the setting you passed to stpwlev was correct. If
+ * the driver goes into a reset loop and hangs the system, then you need the
+ * other setting for this variable. If neither setting lets the machine
+ * boot then you have definite termination problems that may not be fixable.
+ */
+static int aic7xxx_stpwlev = -1;
+/*
+ * Set this to non-0 in order to force the driver to panic the kernel
+ * and print out debugging info on a SCSI abort or reset cycle.
+ */
+static int aic7xxx_panic_on_abort = 0;
+/*
+ * PCI bus parity checking of the Adaptec controllers. This is somewhat
+ * dubious at best. To my knowledge, this option has never actually
+ * solved a PCI parity problem, but on certain machines with broken PCI
+ * chipset configurations, it can generate tons of false error messages.
+ * It's included in the driver for completeness.
+ * 0 = Shut off PCI parity check
+ * -1 = Normal polarity pci parity checking
+ * 1 = reverse polarity pci parity checking
+ *
+ * NOTE: you can't actually pass -1 on the lilo prompt. So, to set this
+ * variable to -1 you would actually want to simply pass the variable
+ * name without a number. That will invert the 0 which will result in
+ * -1.
+ */
+static int aic7xxx_pci_parity = 0;
+/*
+ * Set this to any non-0 value to cause us to dump the contents of all
+ * the card's registers in a hex dump format tailored to each model of
+ * controller.
+ *
+ * NOTE: THE CONTROLLER IS LEFT IN AN UNUSEABLE STATE BY THIS OPTION.
+ * YOU CANNOT BOOT UP WITH THIS OPTION, IT IS FOR DEBUGGING PURPOSES
+ * ONLY
+ */
+static int aic7xxx_dump_card = 0;
+/*
+ * Set this to a non-0 value to make us dump out the 32 bit instruction
+ * registers on the card after completing the sequencer download. This
+ * allows the actual sequencer download to be verified. It is possible
+ * to use this option and still boot up and run your system. This is
+ * only intended for debugging purposes.
+ */
+static int aic7xxx_dump_sequencer = 0;
+/*
+ * Certain newer motherboards have put new PCI based devices into the
+ * IO spaces that used to typically be occupied by VLB or EISA cards.
+ * This overlap can cause these newer motherboards to lock up when scanned
+ * for older EISA and VLB devices. Setting this option to non-0 will
+ * cause the driver to skip scanning for any VLB or EISA controllers and
+ * only support the PCI controllers. NOTE: this means that if the kernel
+ * os compiled with PCI support disabled, then setting this to non-0
+ * would result in never finding any devices :)
+ */
+static int aic7xxx_no_probe = 0;
+
+/*
+ * So that insmod can find the variable and make it point to something
+ */
+#ifdef MODULE
+static char * aic7xxx = NULL;
+#if LINUX_VERSION_CODE > KERNEL_VERSION(2,1,18)
+MODULE_PARM(aic7xxx, "s");
+#endif
+
+/*
+ * Just in case someone uses commas to separate items on the insmod
+ * command line, we define a dummy buffer here to avoid having insmod
+ * write wild stuff into our code segment
+ */
+static char dummy_buffer[60] = "Please don't trounce on me insmod!!\n";
+
+#endif
+
+/*
+ * See the comments earlier in the file for what this item is all about
+ * If you have more than 4 controllers, you will need to increase the
+ * the number of items in the array below. Additionally, if you don't
+ * want to have lilo pass a humongous config line to the aic7xxx driver,
+ * then you can get in and manually adjust these instead of leaving them
+ * at the default. Pay attention to the comments earlier in this file
+ * concerning this array if you are going to hand modify these values.
+ */
+static adapter_tag_info_t aic7xxx_tag_info[] =
+{
+ {DEFAULT_TAG_COMMANDS},
+ {DEFAULT_TAG_COMMANDS},
+ {DEFAULT_TAG_COMMANDS},
+ {DEFAULT_TAG_COMMANDS},
+ {DEFAULT_TAG_COMMANDS},
+ {DEFAULT_TAG_COMMANDS},
+ {DEFAULT_TAG_COMMANDS},
+ {DEFAULT_TAG_COMMANDS},
+ {DEFAULT_TAG_COMMANDS},
+ {DEFAULT_TAG_COMMANDS},
+ {DEFAULT_TAG_COMMANDS},
+ {DEFAULT_TAG_COMMANDS},
+ {DEFAULT_TAG_COMMANDS},
+ {DEFAULT_TAG_COMMANDS},
+ {DEFAULT_TAG_COMMANDS},
+ {DEFAULT_TAG_COMMANDS}
+};
+
+#define VERBOSE_NORMAL 0x0000
+#define VERBOSE_NEGOTIATION 0x0001
+#define VERBOSE_SEQINT 0x0002
+#define VERBOSE_SCSIINT 0x0004
+#define VERBOSE_PROBE 0x0008
+#define VERBOSE_PROBE2 0x0010
+#define VERBOSE_NEGOTIATION2 0x0020
+#define VERBOSE_MINOR_ERROR 0x0040
+#define VERBOSE_TRACING 0x0080
+#define VERBOSE_ABORT 0x0f00
+#define VERBOSE_ABORT_MID 0x0100
+#define VERBOSE_ABORT_FIND 0x0200
+#define VERBOSE_ABORT_PROCESS 0x0400
+#define VERBOSE_ABORT_RETURN 0x0800
+#define VERBOSE_RESET 0xf000
+#define VERBOSE_RESET_MID 0x1000
+#define VERBOSE_RESET_FIND 0x2000
+#define VERBOSE_RESET_PROCESS 0x4000
+#define VERBOSE_RESET_RETURN 0x8000
+static int aic7xxx_verbose = VERBOSE_NORMAL | VERBOSE_NEGOTIATION |
+ VERBOSE_PROBE; /* verbose messages */
+
+
+/****************************************************************************
+ *
+ * We're going to start putting in function declarations so that order of
+ * functions is no longer important. As needed, they are added here.
+ *
+ ***************************************************************************/
+
+static void aic7xxx_panic_abort(struct aic7xxx_host *p, Scsi_Cmnd *cmd);
+static void aic7xxx_print_card(struct aic7xxx_host *p);
+static void aic7xxx_print_scratch_ram(struct aic7xxx_host *p);
+static void aic7xxx_print_sequencer(struct aic7xxx_host *p, int downloaded);
+#ifdef AIC7XXX_VERBOSE_DEBUGGING
+static void aic7xxx_check_scbs(struct aic7xxx_host *p, char *buffer);
+#endif
+
+/****************************************************************************
+ *
+ * These functions are now used. They happen to be wrapped in useless
+ * inb/outb port read/writes around the real reads and writes because it
+ * seems that certain very fast CPUs have a problem dealing with us when
+ * going at full speed.
+ *
+ ***************************************************************************/
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,1,0)
+static inline void
+mdelay(int milliseconds)
+{
+ int i;
+
+ for(i=0; i<milliseconds; i++)
+ udelay(1000);
+}
+#endif
+
+static inline unsigned char
+aic_inb(struct aic7xxx_host *p, long port)
+{
+#ifdef MMAPIO
+ unsigned char x;
+ if(p->maddr)
+ {
+ x = p->maddr[port];
+ }
+ else
+ {
+ x = inb(p->base + port);
+ }
+ mb();
+ return(x);
+#else
+ return(inb(p->base + port));
+#endif
+}
+
+static inline void
+aic_outb(struct aic7xxx_host *p, unsigned char val, long port)
+{
+#ifdef MMAPIO
+ if(p->maddr)
+ {
+ p->maddr[port] = val;
+ }
+ else
+ {
+ outb(val, p->base + port);
+ }
+ mb();
+#else
+ outb(val, p->base + port);
+#endif
+}
+
+/*+F*************************************************************************
+ * Function:
+ * aic7xxx_setup
+ *
+ * Description:
+ * Handle Linux boot parameters. This routine allows for assigning a value
+ * to a parameter with a ':' between the parameter and the value.
+ * ie. aic7xxx=unpause:0x0A,extended
+ *-F*************************************************************************/
+void
+aic7xxx_setup(char *s, int *dummy)
+{
+ int i, n;
+ char *p;
+ char *end;
+
+ static struct {
+ const char *name;
+ unsigned int *flag;
+ } options[] = {
+ { "extended", &aic7xxx_extended },
+ { "no_reset", &aic7xxx_no_reset },
+ { "irq_trigger", &aic7xxx_irq_trigger },
+ { "verbose", &aic7xxx_verbose },
+ { "reverse_scan",&aic7xxx_reverse_scan },
+ { "override_term", &aic7xxx_override_term },
+ { "stpwlev", &aic7xxx_stpwlev },
+ { "no_probe", &aic7xxx_no_probe },
+ { "panic_on_abort", &aic7xxx_panic_on_abort },
+ { "pci_parity", &aic7xxx_pci_parity },
+ { "dump_card", &aic7xxx_dump_card },
+ { "dump_sequencer", &aic7xxx_dump_sequencer },
+ { "tag_info", NULL }
+ };
+
+ end = strchr(s, '\0');
+
+ for (p = strtok(s, ",."); p; p = strtok(NULL, ",."))
+ {
+ for (i = 0; i < NUMBER(options); i++)
+ {
+ n = strlen(options[i].name);
+ if (!strncmp(options[i].name, p, n))
+ {
+ if (!strncmp(p, "tag_info", n))
+ {
+ if (p[n] == ':')
+ {
+ char *base;
+ char *tok, *tok_end, *tok_end2;
+ char tok_list[] = { '.', ',', '{', '}', '\0' };
+ int i, instance = -1, device = -1;
+ unsigned char done = FALSE;
+
+ base = p;
+ tok = base + n + 1; /* Forward us just past the ':' */
+ tok_end = strchr(tok, '\0');
+ if (tok_end < end)
+ *tok_end = ',';
+ while(!done)
+ {
+ switch(*tok)
+ {
+ case '{':
+ if (instance == -1)
+ instance = 0;
+ else if (device == -1)
+ device = 0;
+ tok++;
+ break;
+ case '}':
+ if (device != -1)
+ device = -1;
+ else if (instance != -1)
+ instance = -1;
+ tok++;
+ break;
+ case ',':
+ case '.':
+ if (instance == -1)
+ done = TRUE;
+ else if (device >= 0)
+ device++;
+ else if (instance >= 0)
+ instance++;
+ if ( (device >= MAX_TARGETS) ||
+ (instance >= NUMBER(aic7xxx_tag_info)) )
+ done = TRUE;
+ tok++;
+ if (!done)
+ {
+ base = tok;
+ }
+ break;
+ case '\0':
+ done = TRUE;
+ break;
+ default:
+ done = TRUE;
+ tok_end = strchr(tok, '\0');
+ for(i=0; tok_list[i]; i++)
+ {
+ tok_end2 = strchr(tok, tok_list[i]);
+ if ( (tok_end2) && (tok_end2 < tok_end) )
+ {
+ tok_end = tok_end2;
+ done = FALSE;
+ }
+ }
+ if ( (instance >= 0) && (device >= 0) &&
+ (instance < NUMBER(aic7xxx_tag_info)) &&
+ (device < MAX_TARGETS) )
+ aic7xxx_tag_info[instance].tag_commands[device] =
+ simple_strtoul(tok, NULL, 0) & 0xff;
+ tok = tok_end;
+ break;
+ }
+ }
+ while((p != base) && (p != NULL))
+ p = strtok(NULL, ",.");
+ }
+ }
+ else if (p[n] == ':')
+ {
+ *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0);
+ }
+ else if (!strncmp(p, "verbose", n))
+ {
+ *(options[i].flag) = 0xff09;
+ }
+ else
+ {
+ *(options[i].flag) = ~(*(options[i].flag));
+ }
+ }
+ }
+ }
+}
+
+/*+F*************************************************************************
+ * Function:
+ * pause_sequencer
+ *
+ * Description:
+ * Pause the sequencer and wait for it to actually stop - this
+ * is important since the sequencer can disable pausing for critical
+ * sections.
+ *-F*************************************************************************/
+static inline void
+pause_sequencer(struct aic7xxx_host *p)
+{
+ aic_outb(p, p->pause, HCNTRL);
+ while ((aic_inb(p, HCNTRL) & PAUSE) == 0)
+ {
+ ;
+ }
+}
+
+/*+F*************************************************************************
+ * Function:
+ * unpause_sequencer
+ *
+ * Description:
+ * Unpause the sequencer. Unremarkable, yet done often enough to
+ * warrant an easy way to do it.
+ *-F*************************************************************************/
+static inline void
+unpause_sequencer(struct aic7xxx_host *p, int unpause_always)
+{
+ if (unpause_always ||
+ ( !(aic_inb(p, INTSTAT) & (SCSIINT | SEQINT | BRKADRINT)) &&
+ !(p->flags & AHC_HANDLING_REQINITS) ) )
+ {
+ aic_outb(p, p->unpause, HCNTRL);
+ }
+}
+
+/*+F*************************************************************************
+ * Function:
+ * restart_sequencer
+ *
+ * Description:
+ * Restart the sequencer program from address zero. This assumes
+ * that the sequencer is already paused.
+ *-F*************************************************************************/
+static inline void
+restart_sequencer(struct aic7xxx_host *p)
+{
+ aic_outb(p, 0, SEQADDR0);
+ aic_outb(p, 0, SEQADDR1);
+ aic_outb(p, FASTMODE, SEQCTL);
+}
+
+/*
+ * We include the aic7xxx_seq.c file here so that the other defines have
+ * already been made, and so that it comes before the code that actually
+ * downloads the instructions (since we don't typically use function
+ * prototype, our code has to be ordered that way, it's a left-over from
+ * the original driver days.....I should fix it some time DL).
+ */
+#include "aic7xxx_seq.c"
+
+/*+F*************************************************************************
+ * Function:
+ * aic7xxx_check_patch
+ *
+ * Description:
+ * See if the next patch to download should be downloaded.
+ *-F*************************************************************************/
+static int
+aic7xxx_check_patch(struct aic7xxx_host *p,
+ struct sequencer_patch **start_patch, int start_instr, int *skip_addr)
+{
+ struct sequencer_patch *cur_patch;
+ struct sequencer_patch *last_patch;
+ int num_patches;
+
+ num_patches = sizeof(sequencer_patches)/sizeof(struct sequencer_patch);
+ last_patch = &sequencer_patches[num_patches];
+ cur_patch = *start_patch;
+
+ while ((cur_patch < last_patch) && (start_instr == cur_patch->begin))
+ {
+ if (cur_patch->patch_func(p) == 0)
+ {
+ /*
+ * Start rejecting code.
+ */
+ *skip_addr = start_instr + cur_patch->skip_instr;
+ cur_patch += cur_patch->skip_patch;
+ }
+ else
+ {
+ /*
+ * Found an OK patch. Advance the patch pointer to the next patch
+ * and wait for our instruction pointer to get here.
+ */
+ cur_patch++;
+ }
+ }
+
+ *start_patch = cur_patch;
+ if (start_instr < *skip_addr)
+ /*
+ * Still skipping
+ */
+ return (0);
+ return(1);
+}
+
+
+/*+F*************************************************************************
+ * Function:
+ * aic7xxx_download_instr
+ *
+ * Description:
+ * Find the next patch to download.
+ *-F*************************************************************************/
+static void
+aic7xxx_download_instr(struct aic7xxx_host *p, int instrptr,
+ unsigned char *dconsts)
+{
+ union ins_formats instr;
+ struct ins_format1 *fmt1_ins;
+ struct ins_format3 *fmt3_ins;
+ unsigned char opcode;
+
+ instr = *(union ins_formats*) &seqprog[instrptr * 4];
+
+ instr.integer = le32_to_cpu(instr.integer);
+
+ fmt1_ins = &instr.format1;
+ fmt3_ins = NULL;
+
+ /* Pull the opcode */
+ opcode = instr.format1.opcode;
+ switch (opcode)
+ {
+ case AIC_OP_JMP:
+ case AIC_OP_JC:
+ case AIC_OP_JNC:
+ case AIC_OP_CALL:
+ case AIC_OP_JNE:
+ case AIC_OP_JNZ:
+ case AIC_OP_JE:
+ case AIC_OP_JZ:
+ {
+ struct sequencer_patch *cur_patch;
+ int address_offset;
+ unsigned int address;
+ int skip_addr;
+ int i;
+
+ fmt3_ins = &instr.format3;
+ address_offset = 0;
+ address = fmt3_ins->address;
+ cur_patch = sequencer_patches;
+ skip_addr = 0;
+
+ for (i = 0; i < address;)
+ {
+ aic7xxx_check_patch(p, &cur_patch, i, &skip_addr);
+ if (skip_addr > i)
+ {
+ int end_addr;
+
+ end_addr = MIN(address, skip_addr);
+ address_offset += end_addr - i;
+ i = skip_addr;
+ }
+ else
+ {
+ i++;
+ }
+ }
+ address -= address_offset;
+ fmt3_ins->address = address;
+ /* Fall Through to the next code section */
+ }
+ case AIC_OP_OR:
+ case AIC_OP_AND:
+ case AIC_OP_XOR:
+ case AIC_OP_ADD:
+ case AIC_OP_ADC:
+ case AIC_OP_BMOV:
+ if (fmt1_ins->parity != 0)
+ {
+ fmt1_ins->immediate = dconsts[fmt1_ins->immediate];
+ }
+ fmt1_ins->parity = 0;
+ /* Fall Through to the next code section */
+ case AIC_OP_ROL:
+ if ((p->features & AHC_ULTRA2) != 0)
+ {
+ int i, count;
+
+ /* Calculate odd parity for the instruction */
+ for ( i=0, count=0; i < 31; i++)
+ {
+ unsigned int mask;
+
+ mask = 0x01 << i;
+ if ((instr.integer & mask) != 0)
+ count++;
+ }
+ if (!(count & 0x01))
+ instr.format1.parity = 1;
+ }
+ else
+ {
+ if (fmt3_ins != NULL)
+ {
+ instr.integer = fmt3_ins->immediate |
+ (fmt3_ins->source << 8) |
+ (fmt3_ins->address << 16) |
+ (fmt3_ins->opcode << 25);
+ }
+ else
+ {
+ instr.integer = fmt1_ins->immediate |
+ (fmt1_ins->source << 8) |
+ (fmt1_ins->destination << 16) |
+ (fmt1_ins->ret << 24) |
+ (fmt1_ins->opcode << 25);
+ }
+ }
+ aic_outb(p, (instr.integer & 0xff), SEQRAM);
+ aic_outb(p, ((instr.integer >> 8) & 0xff), SEQRAM);
+ aic_outb(p, ((instr.integer >> 16) & 0xff), SEQRAM);
+ aic_outb(p, ((instr.integer >> 24) & 0xff), SEQRAM);
+ break;
+
+ default:
+ panic("aic7xxx: Unknown opcode encountered in sequencer program.");
+ break;
+ }
+}
+
+
+/*+F*************************************************************************
+ * Function:
+ * aic7xxx_loadseq
+ *
+ * Description:
+ * Load the sequencer code into the controller memory.
+ *-F*************************************************************************/
+static void
+aic7xxx_loadseq(struct aic7xxx_host *p)
+{
+ struct sequencer_patch *cur_patch;
+ int i;
+ int downloaded;
+ int skip_addr;
+ unsigned char download_consts[4] = {0, 0, 0, 0};
+
+ if (aic7xxx_verbose & VERBOSE_PROBE)
+ {
+ printk(KERN_INFO "(scsi%d) Downloading sequencer code...", p->host_no);
+ }
+ download_consts[TMODE_NUMCMDS] = p->num_targetcmds;
+ cur_patch = &sequencer_patches[0];
+ downloaded = 0;
+ skip_addr = 0;
+
+ aic_outb(p, PERRORDIS|LOADRAM|FAILDIS|FASTMODE, SEQCTL);
+ aic_outb(p, 0, SEQADDR0);
+ aic_outb(p, 0, SEQADDR1);
+
+ for (i = 0; i < sizeof(seqprog) / 4; i++)
+ {
+ if (aic7xxx_check_patch(p, &cur_patch, i, &skip_addr) == 0)
+ {
+ /* Skip this instruction for this configuration. */
+ continue;
+ }
+ aic7xxx_download_instr(p, i, &download_consts[0]);
+ downloaded++;
+ }
+
+ aic_outb(p, 0, SEQADDR0);
+ aic_outb(p, 0, SEQADDR1);
+ aic_outb(p, FASTMODE | FAILDIS, SEQCTL);
+ unpause_sequencer(p, TRUE);
+ mdelay(1);
+ pause_sequencer(p);
+ aic_outb(p, FASTMODE, SEQCTL);
+ if (aic7xxx_verbose & VERBOSE_PROBE)
+ {
+ printk(" %d instructions downloaded\n", downloaded);
+ }
+ if (aic7xxx_dump_sequencer)
+ aic7xxx_print_sequencer(p, downloaded);
+}
+
+/*+F*************************************************************************
+ * Function:
+ * aic7xxx_print_sequencer
+ *
+ * Description:
+ * Print the contents of the sequencer memory to the screen.
+ *-F*************************************************************************/
+static void
+aic7xxx_print_sequencer(struct aic7xxx_host *p, int downloaded)
+{
+ int i, k, temp;
+
+ aic_outb(p, PERRORDIS|LOADRAM|FAILDIS|FASTMODE, SEQCTL);
+ aic_outb(p, 0, SEQADDR0);
+ aic_outb(p, 0, SEQADDR1);
+
+ k = 0;
+ for (i=0; i < downloaded; i++)
+ {
+ if ( k == 0 )
+ printk("%03x: ", i);
+ temp = aic_inb(p, SEQRAM);
+ temp |= (aic_inb(p, SEQRAM) << 8);
+ temp |= (aic_inb(p, SEQRAM) << 16);
+ temp |= (aic_inb(p, SEQRAM) << 24);
+ printk("%08x", temp);
+ if ( ++k == 8 )
+ {
+ printk("\n");
+ k = 0;
+ }
+ else
+ printk(" ");
+ }
+ aic_outb(p, 0, SEQADDR0);
+ aic_outb(p, 0, SEQADDR1);
+ aic_outb(p, FASTMODE | FAILDIS, SEQCTL);
+ unpause_sequencer(p, TRUE);
+ mdelay(1);
+ pause_sequencer(p);
+ aic_outb(p, FASTMODE, SEQCTL);
+ printk("\n");
+}
+
+/*+F*************************************************************************
+ * Function:
+ * aic7xxx_delay
+ *
+ * Description:
+ * Delay for specified amount of time. We use mdelay because the timer
+ * interrupt is not guaranteed to be enabled. This will cause an
+ * infinite loop since jiffies (clock ticks) is not updated.
+ *-F*************************************************************************/
+static void
+aic7xxx_delay(int seconds)
+{
+ mdelay(seconds * 1000);
+}
+
+/*+F*************************************************************************
+ * Function:
+ * aic7xxx_info
+ *
+ * Description:
+ * Return a string describing the driver.
+ *-F*************************************************************************/
+const char *
+aic7xxx_info(struct Scsi_Host *dooh)
+{
+ static char buffer[256];
+ char *bp;
+ struct aic7xxx_host *p;
+
+ bp = &buffer[0];
+ p = (struct aic7xxx_host *)dooh->hostdata;
+ memset(bp, 0, sizeof(buffer));
+ strcpy(bp, "Adaptec AHA274x/284x/294x (EISA/VLB/PCI-Fast SCSI) ");
+ strcat(bp, AIC7XXX_C_VERSION);
+ strcat(bp, "/");
+ strcat(bp, AIC7XXX_H_VERSION);
+ strcat(bp, "\n");
+ strcat(bp, " <");
+ strcat(bp, board_names[p->board_name_index]);
+ strcat(bp, ">");
+
+ return(bp);
+}
+
+/*+F*************************************************************************
+ * Function:
+ * aic7xxx_find_syncrate
+ *
+ * Description:
+ * Look up the valid period to SCSIRATE conversion in our table
+ *-F*************************************************************************/
+static struct aic7xxx_syncrate *
+aic7xxx_find_syncrate(struct aic7xxx_host *p, unsigned int *period,
+ unsigned int maxsync)
+{
+ struct aic7xxx_syncrate *syncrate;
+
+ syncrate = &aic7xxx_syncrates[maxsync];
+ while ( (syncrate->rate[0] != NULL) &&
+ (!(p->features & AHC_ULTRA2) || syncrate->sxfr_ultra2) )
+ {
+ if ( *period <= syncrate->period )
+ {
+ /*
+ * When responding to a target that requests sync, the requested rate
+ * may fall between two rates that we can output, but still be a rate
+ * that we can receive. Because of this, we want to respond with the
+ * same rate that it sent to us even if the persiod we use to send
+ * data to it is lower. Only lower the response period if we must.
+ */
+ if(syncrate == &aic7xxx_syncrates[maxsync])
+ {
+ *period = syncrate->period;
+ }
+ break;
+ }
+ syncrate++;
+ }
+ if ( (*period == 0) || (syncrate->rate[0] == NULL) ||
+ ((p->features & AHC_ULTRA2) && (syncrate->sxfr_ultra2 == 0)) )
+ {
+ /*
+ * Use async transfers for this target
+ */
+ *period = 0;
+ syncrate = NULL;
+ }
+ return (syncrate);
+}
+
+
+/*+F*************************************************************************
+ * Function:
+ * aic7xxx_find_period
+ *
+ * Description:
+ * Look up the valid SCSIRATE to period conversion in our table
+ *-F*************************************************************************/
+static unsigned int
+aic7xxx_find_period(struct aic7xxx_host *p, unsigned int scsirate,
+ unsigned int maxsync)
+{
+ struct aic7xxx_syncrate *syncrate;
+
+ if ((p->features & AHC_ULTRA2) != 0)
+ {
+ scsirate &= SXFR_ULTRA2;
+ }
+ else
+ {
+ scsirate &= SXFR;
+ }
+
+ syncrate = &aic7xxx_syncrates[maxsync];
+ while (syncrate->rate[0] != NULL)
+ {
+ if ((p->features & AHC_ULTRA2) != 0)
+ {
+ if (syncrate->sxfr_ultra2 == 0)
+ break;
+ else if (scsirate == syncrate->sxfr_ultra2)
+ return (syncrate->period);
+ }
+ else if (scsirate == (syncrate->sxfr & ~ULTRA_SXFR))
+ {
+ return (syncrate->period);
+ }
+ syncrate++;
+ }
+ return (0); /* async */
+}
+
+/*+F*************************************************************************
+ * Function:
+ * aic7xxx_validate_offset
+ *
+ * Description:
+ * Set a valid offset value for a particular card in use and transfer
+ * settings in use.
+ *-F*************************************************************************/
+static void
+aic7xxx_validate_offset(struct aic7xxx_host *p,
+ struct aic7xxx_syncrate *syncrate, unsigned int *offset, int wide)
+{
+ unsigned int maxoffset;
+
+ /* Limit offset to what the card (and device) can do */
+ if (syncrate == NULL)
+ {
+ maxoffset = 0;
+ }
+ else if (p->features & AHC_ULTRA2)
+ {
+ maxoffset = MAX_OFFSET_ULTRA2;
+ }
+ else
+ {
+ if (wide)
+ maxoffset = MAX_OFFSET_16BIT;
+ else
+ maxoffset = MAX_OFFSET_8BIT;
+ }
+ *offset = MIN(*offset, maxoffset);
+}
+
+/*+F*************************************************************************
+ * Function:
+ * aic7xxx_set_syncrate
+ *
+ * Description:
+ * Set the actual syncrate down in the card and in our host structs
+ *-F*************************************************************************/
+static void
+aic7xxx_set_syncrate(struct aic7xxx_host *p, struct aic7xxx_syncrate *syncrate,
+ int target, int channel, unsigned int period, unsigned int offset,
+ unsigned int type)
+{
+ unsigned char tindex;
+ unsigned short target_mask;
+ unsigned char lun;
+ unsigned int old_period, old_offset;
+
+ tindex = target | (channel << 3);
+ target_mask = 0x01 << tindex;
+ lun = aic_inb(p, SCB_TCL) & 0x07;
+
+ if (syncrate == NULL)
+ {
+ period = 0;
+ offset = 0;
+ }
+
+ old_period = p->transinfo[tindex].cur_period;
+ old_offset = p->transinfo[tindex].cur_offset;
+
+
+ if (type & AHC_TRANS_CUR)
+ {
+ unsigned int scsirate;
+
+ scsirate = aic_inb(p, TARG_SCSIRATE + tindex);
+ if (p->features & AHC_ULTRA2)
+ {
+ scsirate &= ~SXFR_ULTRA2;
+ if (syncrate != NULL)
+ {
+ scsirate |= syncrate->sxfr_ultra2;
+ }
+ if (type & AHC_TRANS_ACTIVE)
+ {
+ aic_outb(p, offset, SCSIOFFSET);
+ }
+ aic_outb(p, offset, TARG_OFFSET + tindex);
+ }
+ else /* Not an Ultra2 controller */
+ {
+ scsirate &= ~(SXFR|SOFS);
+ p->ultraenb &= ~target_mask;
+ if (syncrate != NULL)
+ {
+ if (syncrate->sxfr & ULTRA_SXFR)
+ {
+ p->ultraenb |= target_mask;
+ }
+ scsirate |= (syncrate->sxfr & SXFR);
+ scsirate |= (offset & SOFS);
+ }
+ if (type & AHC_TRANS_ACTIVE)
+ {
+ unsigned char sxfrctl0;
+
+ sxfrctl0 = aic_inb(p, SXFRCTL0);
+ sxfrctl0 &= ~FAST20;
+ if (p->ultraenb & target_mask)
+ sxfrctl0 |= FAST20;
+ aic_outb(p, sxfrctl0, SXFRCTL0);
+ }
+ aic_outb(p, p->ultraenb & 0xff, ULTRA_ENB);
+ aic_outb(p, (p->ultraenb >> 8) & 0xff, ULTRA_ENB + 1 );
+ }
+ if (type & AHC_TRANS_ACTIVE)
+ {
+ aic_outb(p, scsirate, SCSIRATE);
+ }
+ aic_outb(p, scsirate, TARG_SCSIRATE + tindex);
+ p->transinfo[tindex].cur_period = period;
+ p->transinfo[tindex].cur_offset = offset;
+ if ( !(type & AHC_TRANS_QUITE) &&
+ (aic7xxx_verbose & VERBOSE_NEGOTIATION) &&
+ (p->dev_flags[tindex] & DEVICE_PRINT_SDTR) )
+ {
+ if (offset)
+ {
+ int rate_mod = (scsirate & WIDEXFER) ? 1 : 0;
+
+ printk(INFO_LEAD "Synchronous at %s Mbyte/sec, "
+ "offset %d.\n", p->host_no, channel, target, lun,
+ syncrate->rate[rate_mod], offset);
+ }
+ else
+ {
+ printk(INFO_LEAD "Using asynchronous transfers.\n",
+ p->host_no, channel, target, lun);
+ }
+ p->dev_flags[tindex] &= ~DEVICE_PRINT_SDTR;
+ }
+ }
+
+ if (type & AHC_TRANS_GOAL)
+ {
+ p->transinfo[tindex].goal_period = period;
+ p->transinfo[tindex].goal_offset = offset;
+ }
+
+ if (type & AHC_TRANS_USER)
+ {
+ p->transinfo[tindex].user_period = period;
+ p->transinfo[tindex].user_offset = offset;
+ }
+}
+
+/*+F*************************************************************************
+ * Function:
+ * aic7xxx_set_width
+ *
+ * Description:
+ * Set the actual width down in the card and in our host structs
+ *-F*************************************************************************/
+static void
+aic7xxx_set_width(struct aic7xxx_host *p, int target, int channel, int lun,
+ unsigned int width, unsigned int type)
+{
+ unsigned char tindex;
+ unsigned short target_mask;
+ unsigned int old_width, new_offset;
+
+ tindex = target | (channel << 3);
+ target_mask = 1 << tindex;
+
+ old_width = p->transinfo[tindex].cur_width;
+
+ if (p->features & AHC_ULTRA2)
+ new_offset = MAX_OFFSET_ULTRA2;
+ else if (width == MSG_EXT_WDTR_BUS_16_BIT)
+ new_offset = MAX_OFFSET_16BIT;
+ else
+ new_offset = MAX_OFFSET_8BIT;
+
+ if (type & AHC_TRANS_CUR)
+ {
+ unsigned char scsirate;
+
+ scsirate = aic_inb(p, TARG_SCSIRATE + tindex);
+
+ scsirate &= ~WIDEXFER;
+ if (width == MSG_EXT_WDTR_BUS_16_BIT)
+ scsirate |= WIDEXFER;
+
+ aic_outb(p, scsirate, TARG_SCSIRATE + tindex);
+
+ if (type & AHC_TRANS_ACTIVE)
+ aic_outb(p, scsirate, SCSIRATE);
+
+ p->transinfo[tindex].cur_width = width;
+
+ if ((aic7xxx_verbose & VERBOSE_NEGOTIATION2) &&
+ (p->dev_flags[tindex] & DEVICE_PRINT_WDTR))
+ {
+ printk(INFO_LEAD "Using %s transfers\n", p->host_no, channel, target,
+ lun, (scsirate & WIDEXFER) ? "Wide(16bit)" : "Narrow(8bit)" );
+ p->dev_flags[tindex] &= ~DEVICE_PRINT_WDTR;
+ }
+ }
+
+ if (type & AHC_TRANS_GOAL)
+ p->transinfo[tindex].goal_width = width;
+ if (type & AHC_TRANS_USER)
+ p->transinfo[tindex].user_width = width;
+
+ /*
+ * Having just set the width, the SDTR should come next, and we need a valid
+ * offset for the SDTR. So, we make sure we put a valid one in here now as
+ * the goal_offset.
+ */
+ if (p->transinfo[tindex].goal_offset)
+ p->transinfo[tindex].goal_offset = new_offset;
+
+}
+
+/*+F*************************************************************************
+ * Function:
+ * scbq_init
+ *
+ * Description:
+ * SCB queue initialization.
+ *
+ *-F*************************************************************************/
+static void
+scbq_init(volatile scb_queue_type *queue)
+{
+ queue->head = NULL;
+ queue->tail = NULL;
+}
+
+/*+F*************************************************************************
+ * Function:
+ * scbq_insert_head
+ *
+ * Description:
+ * Add an SCB to the head of the list.
+ *
+ *-F*************************************************************************/
+static inline void
+scbq_insert_head(volatile scb_queue_type *queue, struct aic7xxx_scb *scb)
+{
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,1,95)
+ unsigned long cpu_flags;
+#endif
+
+ DRIVER_LOCK
+ scb->q_next = queue->head;
+ queue->head = scb;
+ if (queue->tail == NULL) /* If list was empty, update tail. */
+ queue->tail = queue->head;
+ DRIVER_UNLOCK
+}
+
+/*+F*************************************************************************
+ * Function:
+ * scbq_remove_head
+ *
+ * Description:
+ * Remove an SCB from the head of the list.
+ *
+ *-F*************************************************************************/
+static inline struct aic7xxx_scb *
+scbq_remove_head(volatile scb_queue_type *queue)
+{
+ struct aic7xxx_scb * scbp;
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,1,95)
+ unsigned long cpu_flags;
+#endif
+
+ DRIVER_LOCK
+ scbp = queue->head;
+ if (queue->head != NULL)
+ queue->head = queue->head->q_next;
+ if (queue->head == NULL) /* If list is now empty, update tail. */
+ queue->tail = NULL;
+ DRIVER_UNLOCK
+ return(scbp);
+}
+
+/*+F*************************************************************************
+ * Function:
+ * scbq_remove
+ *
+ * Description:
+ * Removes an SCB from the list.
+ *
+ *-F*************************************************************************/
+static inline void
+scbq_remove(volatile scb_queue_type *queue, struct aic7xxx_scb *scb)
+{
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,1,95)
+ unsigned long cpu_flags;
+#endif
+
+ DRIVER_LOCK
+ if (queue->head == scb)
+ {
+ /* At beginning of queue, remove from head. */
+ scbq_remove_head(queue);
+ }
+ else
+ {
+ struct aic7xxx_scb *curscb = queue->head;
+
+ /*
+ * Search until the next scb is the one we're looking for, or
+ * we run out of queue.
+ */
+ while ((curscb != NULL) && (curscb->q_next != scb))
+ {
+ curscb = curscb->q_next;
+ }
+ if (curscb != NULL)
+ {
+ /* Found it. */
+ curscb->q_next = scb->q_next;
+ if (scb->q_next == NULL)
+ {
+ /* Update the tail when removing the tail. */
+ queue->tail = curscb;
+ }
+ }
+ }
+ DRIVER_UNLOCK
+}
+
+/*+F*************************************************************************
+ * Function:
+ * scbq_insert_tail
+ *
+ * Description:
+ * Add an SCB at the tail of the list.
+ *
+ *-F*************************************************************************/
+static inline void
+scbq_insert_tail(volatile scb_queue_type *queue, struct aic7xxx_scb *scb)
+{
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,1,95)
+ unsigned long cpu_flags;
+#endif
+
+ DRIVER_LOCK
+ scb->q_next = NULL;
+ if (queue->tail != NULL) /* Add the scb at the end of the list. */
+ queue->tail->q_next = scb;
+ queue->tail = scb; /* Update the tail. */
+ if (queue->head == NULL) /* If list was empty, update head. */
+ queue->head = queue->tail;
+ DRIVER_UNLOCK
+}
+
+/*+F*************************************************************************
+ * Function:
+ * aic7xxx_match_scb
+ *
+ * Description:
+ * Checks to see if an scb matches the target/channel as specified.
+ * If target is ALL_TARGETS (-1), then we're looking for any device
+ * on the specified channel; this happens when a channel is going
+ * to be reset and all devices on that channel must be aborted.
+ *-F*************************************************************************/
+static int
+aic7xxx_match_scb(struct aic7xxx_host *p, struct aic7xxx_scb *scb,
+ int target, int channel, int lun, unsigned char tag)
+{
+ int targ = (scb->hscb->target_channel_lun >> 4) & 0x0F;
+ int chan = (scb->hscb->target_channel_lun >> 3) & 0x01;
+ int slun = scb->hscb->target_channel_lun & 0x07;
+ int match;
+
+ match = ((chan == channel) || (channel == ALL_CHANNELS));
+ if (match != 0)
+ match = ((targ == target) || (target == ALL_TARGETS));
+ if (match != 0)
+ match = ((lun == slun) || (lun == ALL_LUNS));
+ if (match != 0)
+ match = ((tag == scb->hscb->tag) || (tag == SCB_LIST_NULL));
+
+ if (aic7xxx_verbose & (VERBOSE_ABORT_PROCESS | VERBOSE_RESET_PROCESS))
+ {
+ printk(KERN_INFO "(scsi%d:%d:%d:%d:tag%d) %s search criteria"
+ " (scsi%d:%d:%d:%d:tag%d)\n", p->host_no, CTL_OF_SCB(scb),
+ scb->hscb->tag, (match) ? "matches" : "doesn't match",
+ p->host_no, channel, target, lun, tag);
+ }
+
+ return (match);
+}
+
+/*+F*************************************************************************
+ * Function:
+ * aic7xxx_add_curscb_to_free_list
+ *
+ * Description:
+ * Adds the current scb (in SCBPTR) to the list of free SCBs.
+ *-F*************************************************************************/
+static void
+aic7xxx_add_curscb_to_free_list(struct aic7xxx_host *p)
+{
+ /*
+ * Invalidate the tag so that aic7xxx_find_scb doesn't think
+ * it's active
+ */
+ aic_outb(p, SCB_LIST_NULL, SCB_TAG);
+ aic_outb(p, 0, SCB_CONTROL);
+
+ aic_outb(p, aic_inb(p, FREE_SCBH), SCB_NEXT);
+ aic_outb(p, aic_inb(p, SCBPTR), FREE_SCBH);
+}
+
+/*+F*************************************************************************
+ * Function:
+ * aic7xxx_rem_scb_from_disc_list
+ *
+ * Description:
+ * Removes the current SCB from the disconnected list and adds it
+ * to the free list.
+ *-F*************************************************************************/
+static unsigned char
+aic7xxx_rem_scb_from_disc_list(struct aic7xxx_host *p, unsigned char scbptr)
+{
+ unsigned char next;
+ unsigned char prev;
+
+ aic_outb(p, scbptr, SCBPTR);
+ next = aic_inb(p, SCB_NEXT);
+ prev = aic_inb(p, SCB_PREV);
+ aic7xxx_add_curscb_to_free_list(p);
+
+ if (prev != SCB_LIST_NULL)
+ {
+ aic_outb(p, prev, SCBPTR);
+ aic_outb(p, next, SCB_NEXT);
+ }
+ else
+ {
+ aic_outb(p, next, DISCONNECTED_SCBH);
+ }
+
+ if (next != SCB_LIST_NULL)
+ {
+ aic_outb(p, next, SCBPTR);
+ aic_outb(p, prev, SCB_PREV);
+ }
+ return next;
+}
+
+/*+F*************************************************************************
+ * Function:
+ * aic7xxx_busy_target
+ *
+ * Description:
+ * Set the specified target busy.
+ *-F*************************************************************************/
+static inline void
+aic7xxx_busy_target(struct aic7xxx_host *p, struct aic7xxx_scb *scb)
+{
+ p->untagged_scbs[scb->hscb->target_channel_lun] = scb->hscb->tag;
+}
+
+/*+F*************************************************************************
+ * Function:
+ * aic7xxx_index_busy_target
+ *
+ * Description:
+ * Returns the index of the busy target, and optionally sets the
+ * target inactive.
+ *-F*************************************************************************/
+static inline unsigned char
+aic7xxx_index_busy_target(struct aic7xxx_host *p, unsigned char tcl,
+ int unbusy)
+{
+ unsigned char busy_scbid;
+
+ busy_scbid = p->untagged_scbs[tcl];
+ if (unbusy)
+ {
+ p->untagged_scbs[tcl] = SCB_LIST_NULL;
+ }
+ return (busy_scbid);
+}
+
+/*+F*************************************************************************
+ * Function:
+ * aic7xxx_find_scb
+ *
+ * Description:
+ * Look through the SCB array of the card and attempt to find the
+ * hardware SCB that corresponds to the passed in SCB. Return
+ * SCB_LIST_NULL if unsuccessful. This routine assumes that the
+ * card is already paused.
+ *-F*************************************************************************/
+static unsigned char
+aic7xxx_find_scb(struct aic7xxx_host *p, struct aic7xxx_scb *scb)
+{
+ unsigned char saved_scbptr;
+ unsigned char curindex;
+
+ saved_scbptr = aic_inb(p, SCBPTR);
+ curindex = 0;
+ for (curindex = 0; curindex < p->scb_data->maxhscbs; curindex++)
+ {
+ aic_outb(p, curindex, SCBPTR);
+ if (aic_inb(p, SCB_TAG) == scb->hscb->tag)
+ {
+ break;
+ }
+ }
+ aic_outb(p, saved_scbptr, SCBPTR);
+ if (curindex >= p->scb_data->maxhscbs)
+ {
+ curindex = SCB_LIST_NULL;
+ }
+
+ return (curindex);
+}
+
+/*+F*************************************************************************
+ * Function:
+ * aic7xxx_allocate_scb
+ *
+ * Description:
+ * Get an SCB from the free list or by allocating a new one.
+ *-F*************************************************************************/
+static int
+aic7xxx_allocate_scb(struct aic7xxx_host *p)
+{
+ struct aic7xxx_scb *scbp = NULL;
+ int scb_size = sizeof(struct aic7xxx_scb) +
+ sizeof (struct hw_scatterlist) * AIC7XXX_MAX_SG;
+ int i;
+ int step = PAGE_SIZE / 1024;
+ unsigned long scb_count = 0;
+ struct hw_scatterlist *hsgp;
+ struct aic7xxx_scb *scb_ap;
+ unsigned long temp;
+
+
+ if (p->scb_data->numscbs < p->scb_data->maxscbs)
+ {
+ /*
+ * Calculate the optimal number of SCBs to allocate.
+ *
+ * NOTE: This formula works because the sizeof(sg_array) is always
+ * 1024. Therefore, scb_size * i would always be > PAGE_SIZE *
+ * (i/step). The (i-1) allows the left hand side of the equation
+ * to grow into the right hand side to a point of near perfect
+ * efficiency since scb_size * (i -1) is growing slightly faster
+ * than the right hand side. If the number of SG array elements
+ * is changed, this function may not be near so efficient any more.
+ */
+ for ( i=step;; i *= 2 )
+ {
+ if ( (scb_size * (i-1)) >= ( (PAGE_SIZE * (i/step)) - 64 ) )
+ {
+ i /= 2;
+ break;
+ }
+ }
+ scb_count = MIN( (i-1), p->scb_data->maxscbs - p->scb_data->numscbs);
+ scb_ap = (struct aic7xxx_scb *)kmalloc(scb_size * scb_count, GFP_ATOMIC);
+ if (scb_ap != NULL)
+ {
+#ifdef AIC7XXX_VERBOSE_DEBUGGING
+ if (aic7xxx_verbose > 0xffff)
+ {
+ if (p->scb_data->numscbs == 0)
+ printk(INFO_LEAD "Allocating initial %ld SCB structures.\n",
+ p->host_no, -1, -1, -1, scb_count);
+ else
+ printk(INFO_LEAD "Allocating %ld additional SCB structures.\n",
+ p->host_no, -1, -1, -1, scb_count);
+ }
+#endif
+ memset(scb_ap, 0, scb_count * scb_size);
+ temp = (unsigned long) &scb_ap[scb_count];
+ temp += 1023;
+ temp &= ~1023;
+ hsgp = (struct hw_scatterlist *)temp;
+ for (i=0; i < scb_count; i++)
+ {
+ scbp = &scb_ap[i];
+ scbp->hscb = &p->scb_data->hscbs[p->scb_data->numscbs];
+ scbp->sg_list = &hsgp[i * AIC7XXX_MAX_SG];
+ memset(scbp->hscb, 0, sizeof(struct aic7xxx_hwscb));
+ scbp->hscb->tag = p->scb_data->numscbs;
+ /*
+ * Place in the scb array; never is removed
+ */
+ p->scb_data->scb_array[p->scb_data->numscbs++] = scbp;
+ scbq_insert_head(&p->scb_data->free_scbs, scbp);
+ }
+ scbp->kmalloc_ptr = scb_ap;
+ }
+ else
+ {
+ return(0);
+ }
+ }
+ return(scb_count);
+}
+
+/*+F*************************************************************************
+ * Function:
+ * aic7xxx_queue_cmd_complete
+ *
+ * Description:
+ * Due to race conditions present in the SCSI subsystem, it is easier
+ * to queue completed commands, then call scsi_done() on them when
+ * we're finished. This function queues the completed commands.
+ *-F*************************************************************************/
+static void
+aic7xxx_queue_cmd_complete(struct aic7xxx_host *p, Scsi_Cmnd *cmd)
+{
+ cmd->host_scribble = (char *)p->completeq.head;
+ p->completeq.head = cmd;
+}
+
+/*+F*************************************************************************
+ * Function:
+ * aic7xxx_done_cmds_complete
+ *
+ * Description:
+ * Process the completed command queue.
+ *-F*************************************************************************/
+static void
+aic7xxx_done_cmds_complete(struct aic7xxx_host *p)
+{
+ Scsi_Cmnd *cmd;
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,1,95)
+ unsigned int cpu_flags = 0;
+
+ DRIVER_LOCK
+ while (p->completeq.head != NULL)
+ {
+ cmd = p->completeq.head;
+ p->completeq.head = (Scsi_Cmnd *)cmd->host_scribble;
+ cmd->host_scribble = NULL;
+ sti();
+ cmd->scsi_done(cmd);
+ cli();
+ }
+ DRIVER_UNLOCK
+#else
+ while (p->completeq.head != NULL)
+ {
+ cmd = p->completeq.head;
+ p->completeq.head = (Scsi_Cmnd *)cmd->host_scribble;
+ cmd->host_scribble = NULL;
+ cmd->scsi_done(cmd);
+ }
+#endif
+}
+
+/*+F*************************************************************************
+ * Function:
+ * aic7xxx_free_scb
+ *
+ * Description:
+ * Free the scb and insert into the free scb list.
+ *-F*************************************************************************/
+static void
+aic7xxx_free_scb(struct aic7xxx_host *p, struct aic7xxx_scb *scb)
+{
+
+ scb->flags = SCB_FREE;
+ scb->cmd = NULL;
+ scb->sg_count = 0;
+ scb->sg_length = 0;
+ scb->tag_action = 0;
+ scb->hscb->control = 0;
+ scb->hscb->target_status = 0;
+ scb->hscb->target_channel_lun = SCB_LIST_NULL;
+
+ scbq_insert_head(&p->scb_data->free_scbs, scb);
+}
+
+/*+F*************************************************************************
+ * Function:
+ * aic7xxx_done
+ *
+ * Description:
+ * Calls the higher level scsi done function and frees the scb.
+ *-F*************************************************************************/
+static void
+aic7xxx_done(struct aic7xxx_host *p, struct aic7xxx_scb *scb)
+{
+ Scsi_Cmnd *cmd = scb->cmd;
+ int tindex = TARGET_INDEX(cmd);
+ struct aic7xxx_scb *scbp;
+ unsigned char queue_depth;
+
+ if (scb->flags & SCB_RECOVERY_SCB)
+ {
+ p->flags &= ~AHC_ABORT_PENDING;
+ }
+ if (scb->flags & SCB_RESET)
+ {
+ cmd->result = (DID_RESET << 16) | (cmd->result & 0xffff);
+ }
+ else if (scb->flags & SCB_ABORT)
+ {
+ cmd->result = (DID_RESET << 16) | (cmd->result & 0xffff);
+ }
+ else if (!(p->dev_flags[tindex] & DEVICE_SCANNED))
+ {
+ if ( (cmd->cmnd[0] == INQUIRY) && (cmd->result == DID_OK) )
+ {
+ char *buffer;
+
+ if(cmd->use_sg)
+ {
+ struct scatterlist *sg;
+
+ sg = (struct scatterlist *)cmd->request_buffer;
+ buffer = (char *)sg[0].address;
+ }
+ else
+ {
+ buffer = (char *)cmd->request_buffer;
+ }
+#define WIDE_INQUIRY_BITS 0x60
+#define SYNC_INQUIRY_BITS 0x10
+ if ( (buffer[7] & WIDE_INQUIRY_BITS) &&
+ (p->features & AHC_WIDE) )
+ {
+ p->needwdtr |= (1<<tindex);
+ p->needwdtr_copy |= (1<<tindex);
+ if ( (p->flags & AHC_SEEPROM_FOUND) &&
+ (p->transinfo[tindex].user_width != MSG_EXT_WDTR_BUS_16_BIT) )
+ p->transinfo[tindex].goal_width = MSG_EXT_WDTR_BUS_8_BIT;
+ else
+ p->transinfo[tindex].goal_width = MSG_EXT_WDTR_BUS_16_BIT;
+ }
+ else
+ {
+ p->needwdtr &= ~(1<<tindex);
+ p->needwdtr_copy &= ~(1<<tindex);
+ pause_sequencer(p);
+ aic7xxx_set_width(p, cmd->target, cmd->channel, cmd->lun,
+ MSG_EXT_WDTR_BUS_8_BIT, (AHC_TRANS_ACTIVE |
+ AHC_TRANS_GOAL |
+ AHC_TRANS_CUR) );
+ unpause_sequencer(p, FALSE);
+ }
+ if (buffer[7] & SYNC_INQUIRY_BITS)
+ {
+ p->needsdtr |= (1<<tindex);
+ p->needsdtr_copy |= (1<<tindex);
+
+ if (p->flags & AHC_SEEPROM_FOUND)
+ p->transinfo[tindex].goal_period = p->transinfo[tindex].user_period;
+ else if (p->features & AHC_ULTRA2)
+ p->transinfo[tindex].goal_period =
+ aic7xxx_syncrates[AHC_SYNCRATE_ULTRA2].period;
+ else if (p->features & AHC_ULTRA)
+ p->transinfo[tindex].goal_period =
+ aic7xxx_syncrates[AHC_SYNCRATE_ULTRA].period;
+ else
+ p->transinfo[tindex].goal_period =
+ aic7xxx_syncrates[AHC_SYNCRATE_FAST].period;
+
+ if (p->features & AHC_ULTRA2)
+ p->transinfo[tindex].goal_offset = MAX_OFFSET_ULTRA2;
+ else if (p->transinfo[tindex].goal_width == MSG_EXT_WDTR_BUS_16_BIT)
+ p->transinfo[tindex].goal_offset = MAX_OFFSET_16BIT;
+ else
+ p->transinfo[tindex].goal_offset = MAX_OFFSET_8BIT;
+ }
+ else
+ {
+ p->needsdtr &= ~(1<<tindex);
+ p->needsdtr_copy &= ~(1<<tindex);
+ p->transinfo[tindex].goal_period = 0;
+ p->transinfo[tindex].goal_offset = 0;
+ }
+ p->dev_flags[tindex] |= DEVICE_SCANNED;
+ p->dev_flags[tindex] |= DEVICE_PRINT_WDTR | DEVICE_PRINT_SDTR;
+#undef WIDE_INQUIRY_BITS
+#undef SYNC_INQUIRY_BITS
+ }
+ }
+ else if ((scb->flags & (SCB_MSGOUT_WDTR | SCB_MSGOUT_SDTR)) != 0)
+ {
+ unsigned short mask;
+ int message_error = FALSE;
+
+ mask = 0x01 << tindex;
+
+ /*
+ * Check to see if we get an invalid message or a message error
+ * after failing to negotiate a wide or sync transfer message.
+ */
+ if ((scb->flags & SCB_SENSE) &&
+ ((scb->cmd->sense_buffer[12] == 0x43) || /* INVALID_MESSAGE */
+ (scb->cmd->sense_buffer[12] == 0x49))) /* MESSAGE_ERROR */
+ {
+ message_error = TRUE;
+ }
+
+ if (scb->flags & SCB_MSGOUT_WDTR)
+ {
+ p->wdtr_pending &= ~mask;
+ if (message_error)
+ {
+ if ( (aic7xxx_verbose & VERBOSE_NEGOTIATION2) &&
+ (p->dev_flags[tindex] & DEVICE_PRINT_WDTR) )
+ {
+ printk(INFO_LEAD "Device failed to complete Wide Negotiation "
+ "processing and\n", p->host_no, CTL_OF_SCB(scb));
+ printk(INFO_LEAD "returned a sense error code for invalid message, "
+ "disabling future\n", p->host_no, CTL_OF_SCB(scb));
+ printk(INFO_LEAD "Wide negotiation to this device.\n", p->host_no,
+ CTL_OF_SCB(scb));
+ p->dev_flags[tindex] &= ~DEVICE_PRINT_WDTR;
+ }
+ p->needwdtr &= ~mask;
+ p->needwdtr_copy &= ~mask;
+ }
+ }
+ if (scb->flags & SCB_MSGOUT_SDTR)
+ {
+ p->sdtr_pending &= ~mask;
+ if (message_error)
+ {
+ if ( (aic7xxx_verbose & VERBOSE_NEGOTIATION2) &&
+ (p->dev_flags[tindex] & DEVICE_PRINT_SDTR) )
+ {
+ printk(INFO_LEAD "Device failed to complete Sync Negotiation "
+ "processing and\n", p->host_no, CTL_OF_SCB(scb));
+ printk(INFO_LEAD "returned a sense error code for invalid message, "
+ "disabling future\n", p->host_no, CTL_OF_SCB(scb));
+ printk(INFO_LEAD "Sync negotiation to this device.\n", p->host_no,
+ CTL_OF_SCB(scb));
+ p->dev_flags[tindex] &= ~DEVICE_PRINT_SDTR;
+ }
+ p->needsdtr &= ~mask;
+ p->needsdtr_copy &= ~mask;
+ }
+ }
+ }
+ queue_depth = p->dev_temp_queue_depth[tindex];
+ if (queue_depth >= p->dev_active_cmds[tindex])
+ {
+ scbp = scbq_remove_head(&p->delayed_scbs[tindex]);
+ if (scbp)
+ {
+ if (queue_depth == 1)
+ {
+ /*
+ * Give extra preference to untagged devices, such as CD-R devices
+ * This makes it more likely that a drive *won't* stuff up while
+ * waiting on data at a critical time, such as CD-R writing and
+ * audio CD ripping operations. Should also benefit tape drives.
+ */
+ scbq_insert_head(&p->waiting_scbs, scbp);
+ }
+ else
+ {
+ scbq_insert_tail(&p->waiting_scbs, scbp);
+ }
+#ifdef AIC7XXX_VERBOSE_DEBUGGING
+ if (aic7xxx_verbose > 0xffff)
+ printk(INFO_LEAD "Moving SCB from delayed to waiting queue.\n",
+ p->host_no, CTL_OF_SCB(scbp));
+#endif
+ if (queue_depth > p->dev_active_cmds[tindex])
+ {
+ scbp = scbq_remove_head(&p->delayed_scbs[tindex]);
+ if (scbp)
+ scbq_insert_tail(&p->waiting_scbs, scbp);
+ }
+ }
+ }
+ if ( !(scb->tag_action) && (p->tagenable & (1<<tindex)) )
+ {
+ p->dev_temp_queue_depth[tindex] = p->dev_max_queue_depth[tindex];
+ }
+ p->dev_active_cmds[tindex]--;
+ p->activescbs--;
+
+ /*
+ * If this was an untagged I/O, unbusy the target so the sequencer won't
+ * mistake things later
+ */
+ if (aic7xxx_index_busy_target(p, scb->hscb->target_channel_lun, FALSE) ==
+ scb->hscb->tag)
+ {
+ aic7xxx_index_busy_target(p, scb->hscb->target_channel_lun, TRUE);
+ }
+
+ {
+ int actual;
+
+ /*
+ * XXX: we should actually know how much actually transferred
+ * XXX: for each command, but apparently that's too difficult.
+ *
+ * We set a lower limit of 512 bytes on the transfer length. We
+ * ignore anything less than this because we don't have a real
+ * reason to count it. Read/Writes to tapes are usually about 20K
+ * and disks are a minimum of 512 bytes unless you want to count
+ * non-read/write commands (such as TEST_UNIT_READY) which we don't
+ */
+ actual = scb->sg_length;
+ if ((actual >= 512) && (((cmd->result >> 16) & 0xf) == DID_OK))
+ {
+ struct aic7xxx_xferstats *sp;
+#ifdef AIC7XXX_PROC_STATS
+ long *ptr;
+ int x;
+#endif /* AIC7XXX_PROC_STATS */
+
+ sp = &p->stats[TARGET_INDEX(cmd)][cmd->lun & 0x7];
+ sp->xfers++;
+#ifdef AIC7XXX_VERBOSE_DEBUGGING
+ if ( (sp->xfers > 16) && (aic7xxx_verbose > 0xffff) )
+ aic7xxx_verbose &= 0xffff;
+#endif
+
+ /*
+ * For block devices, cmd->request.cmd is always == either READ or
+ * WRITE. For character devices, this isn't always set properly, so
+ * we check data_cmnd[0]. This catches the conditions for st.c, but
+ * I'm still not sure if request.cmd is valid for sg devices.
+ */
+ if ( (cmd->request.cmd == WRITE) || (cmd->data_cmnd[0] == WRITE_6) ||
+ (cmd->data_cmnd[0] == WRITE_FILEMARKS) )
+ {
+ sp->w_total++;
+ sp->w_total512 += (actual >> 9);
+#ifdef AIC7XXX_PROC_STATS
+ ptr = sp->w_bins;
+#endif /* AIC7XXX_PROC_STATS */
+ }
+ else
+ {
+ sp->r_total++;
+ sp->r_total512 += (actual >> 9);
+#ifdef AIC7XXX_PROC_STATS
+ ptr = sp->r_bins;
+#endif /* AIC7XXX_PROC_STATS */
+ }
+#ifdef AIC7XXX_PROC_STATS
+ for (x = 9; x <= 17; x++)
+ {
+ if (actual < (1 << x))
+ {
+ ptr[x - 9]++;
+ break;
+ }
+ }
+ if (x > 17)
+ {
+ ptr[x - 9]++;
+ }
+#endif /* AIC7XXX_PROC_STATS */
+ }
+ }
+ aic7xxx_free_scb(p, scb);
+ aic7xxx_queue_cmd_complete(p, cmd);
+
+}
+
+/*+F*************************************************************************
+ * Function:
+ * aic7xxx_run_done_queue
+ *
+ * Description:
+ * Calls the aic7xxx_done() for the Scsi_Cmnd of each scb in the
+ * aborted list, and adds each scb to the free list. If complete
+ * is TRUE, we also process the commands complete list.
+ *-F*************************************************************************/
+static void
+aic7xxx_run_done_queue(struct aic7xxx_host *p, /*complete*/ int complete)
+{
+ struct aic7xxx_scb *scb;
+ int i, found = 0;
+
+ for (i = 0; i < p->scb_data->numscbs; i++)
+ {
+ scb = p->scb_data->scb_array[i];
+ if (scb->flags & SCB_QUEUED_FOR_DONE)
+ {
+ if (aic7xxx_verbose & (VERBOSE_ABORT_PROCESS | VERBOSE_RESET_PROCESS))
+ printk(INFO_LEAD "Aborting scb %d\n",
+ p->host_no, CTL_OF_SCB(scb), scb->hscb->tag);
+ found++;
+ aic7xxx_done(p, scb);
+ }
+ }
+ if (aic7xxx_verbose & (VERBOSE_ABORT_RETURN | VERBOSE_RESET_RETURN))
+ {
+ printk(INFO_LEAD "%d commands found and queued for "
+ "completion.\n", p->host_no, -1, -1, -1, found);
+ }
+ if (complete)
+ {
+ aic7xxx_done_cmds_complete(p);
+ }
+}
+
+/*+F*************************************************************************
+ * Function:
+ * aic7xxx_abort_waiting_scb
+ *
+ * Description:
+ * Manipulate the waiting for selection list and return the
+ * scb that follows the one that we remove.
+ *-F*************************************************************************/
+static unsigned char
+aic7xxx_abort_waiting_scb(struct aic7xxx_host *p, struct aic7xxx_scb *scb,
+ unsigned char scbpos, unsigned char prev)
+{
+ unsigned char curscb, next;
+
+ /*
+ * Select the SCB we want to abort and pull the next pointer out of it.
+ */
+ curscb = aic_inb(p, SCBPTR);
+ aic_outb(p, scbpos, SCBPTR);
+ next = aic_inb(p, SCB_NEXT);
+
+ aic7xxx_add_curscb_to_free_list(p);
+
+ /*
+ * Update the waiting list
+ */
+ if (prev == SCB_LIST_NULL)
+ {
+ /*
+ * First in the list
+ */
+ aic_outb(p, next, WAITING_SCBH);
+ }
+ else
+ {
+ /*
+ * Select the scb that pointed to us and update its next pointer.
+ */
+ aic_outb(p, prev, SCBPTR);
+ aic_outb(p, next, SCB_NEXT);
+ }
+ /*
+ * Point us back at the original scb position and inform the SCSI
+ * system that the command has been aborted.
+ */
+ aic_outb(p, curscb, SCBPTR);
+ return (next);
+}
+
+/*+F*************************************************************************
+ * Function:
+ * aic7xxx_search_qinfifo
+ *
+ * Description:
+ * Search the queue-in FIFO for matching SCBs and conditionally
+ * requeue. Returns the number of matching SCBs.
+ *-F*************************************************************************/
+static int
+aic7xxx_search_qinfifo(struct aic7xxx_host *p, int target, int channel,
+ int lun, unsigned char tag, int flags, int requeue,
+ volatile scb_queue_type *queue)
+{
+ int found;
+ unsigned char qinpos, qintail;
+ struct aic7xxx_scb *scbp;
+
+ found = 0;
+ qinpos = aic_inb(p, QINPOS);
+ qintail = p->qinfifonext;
+
+ p->qinfifonext = qinpos;
+
+ while (qinpos != qintail)
+ {
+ scbp = p->scb_data->scb_array[p->qinfifo[qinpos++]];
+ if (aic7xxx_match_scb(p, scbp, target, channel, lun, tag))
+ {
+ /*
+ * We found an scb that needs to be removed.
+ */
+ if (requeue && (queue != NULL))
+ {
+ if (scbp->flags & SCB_WAITINGQ)
+ {
+ scbq_remove(queue, scbp);
+ scbq_remove(&p->waiting_scbs, scbp);
+ scbq_remove(&p->delayed_scbs[TARGET_INDEX(scbp->cmd)], scbp);
+ p->dev_active_cmds[TARGET_INDEX(scbp->cmd)]++;
+ p->activescbs++;
+ }
+ scbq_insert_tail(queue, scbp);
+ p->dev_active_cmds[TARGET_INDEX(scbp->cmd)]--;
+ p->activescbs--;
+ scbp->flags |= SCB_WAITINGQ;
+ if ( !(scbp->tag_action & TAG_ENB) )
+ {
+ aic7xxx_index_busy_target(p, scbp->hscb->target_channel_lun,
+ TRUE);
+ }
+ }
+ else if (requeue)
+ {
+ p->qinfifo[p->qinfifonext++] = scbp->hscb->tag;
+ }
+ else
+ {
+ /*
+ * Preserve any SCB_RECOVERY_SCB flags on this scb then set the
+ * flags we were called with, presumeably so aic7xxx_run_done_queue
+ * can find this scb
+ */
+ scbp->flags = flags | (scbp->flags & SCB_RECOVERY_SCB);
+ if (aic7xxx_index_busy_target(p, scbp->hscb->target_channel_lun,
+ FALSE) == scbp->hscb->tag)
+ {
+ aic7xxx_index_busy_target(p, scbp->hscb->target_channel_lun,
+ TRUE);
+ }
+ }
+ found++;
+ }
+ else
+ {
+ p->qinfifo[p->qinfifonext++] = scbp->hscb->tag;
+ }
+ }
+ /*
+ * Now that we've done the work, clear out any left over commands in the
+ * qinfifo and update the KERNEL_QINPOS down on the card.
+ *
+ * NOTE: This routine expect the sequencer to already be paused when
+ * it is run....make sure it's that way!
+ */
+ qinpos = p->qinfifonext;
+ while(qinpos != qintail)
+ {
+ p->qinfifo[qinpos++] = SCB_LIST_NULL;
+ }
+ if (p->features & AHC_QUEUE_REGS)
+ aic_outb(p, p->qinfifonext, HNSCB_QOFF);
+ else
+ aic_outb(p, p->qinfifonext, KERNEL_QINPOS);
+
+ return (found);
+}
+
+/*+F*************************************************************************
+ * Function:
+ * aic7xxx_scb_on_qoutfifo
+ *
+ * Description:
+ * Is the scb that was passed to us currently on the qoutfifo?
+ *-F*************************************************************************/
+static int
+aic7xxx_scb_on_qoutfifo(struct aic7xxx_host *p, struct aic7xxx_scb *scb)
+{
+ int i=0;
+
+ while(p->qoutfifo[(p->qoutfifonext + i) & 0xff ] != SCB_LIST_NULL)
+ {
+ if(p->qoutfifo[(p->qoutfifonext + i) & 0xff ] == scb->hscb->tag)
+ return TRUE;
+ else
+ i++;
+ }
+ return FALSE;
+}
+
+
+/*+F*************************************************************************
+ * Function:
+ * aic7xxx_reset_device
+ *
+ * Description:
+ * The device at the given target/channel has been reset. Abort
+ * all active and queued scbs for that target/channel. This function
+ * need not worry about linked next pointers because if was a MSG_ABORT_TAG
+ * then we had a tagged command (no linked next), if it was MSG_ABORT or
+ * MSG_BUS_DEV_RESET then the device won't know about any commands any more
+ * and no busy commands will exist, and if it was a bus reset, then nothing
+ * knows about any linked next commands any more. In all cases, we don't
+ * need to worry about the linked next or busy scb, we just need to clear
+ * them.
+ *-F*************************************************************************/
+static void
+aic7xxx_reset_device(struct aic7xxx_host *p, int target, int channel,
+ int lun, unsigned char tag)
+{
+ struct aic7xxx_scb *scbp;
+ unsigned char active_scb, tcl;
+ int i = 0, j, init_lists = FALSE;
+
+ /*
+ * Restore this when we're done
+ */
+ active_scb = aic_inb(p, SCBPTR);
+
+ if (aic7xxx_verbose & (VERBOSE_RESET_PROCESS | VERBOSE_ABORT_PROCESS))
+ printk(INFO_LEAD "Reset device, active_scb %d\n",
+ p->host_no, channel, target, lun, active_scb);
+ /*
+ * Deal with the busy target and linked next issues.
+ */
+ {
+ int min_target, max_target;
+ struct aic7xxx_scb *scbp, *prev_scbp;
+
+ /* Make all targets 'relative' to bus A. */
+ if (target == ALL_TARGETS)
+ {
+ switch (channel)
+ {
+ case 0:
+ min_target = 0;
+ max_target = (p->features & AHC_WIDE) ? 15 : 7;
+ break;
+ case 1:
+ min_target = 8;
+ max_target = 15;
+ break;
+ case ALL_CHANNELS:
+ default:
+ min_target = 0;
+ max_target = (p->features & (AHC_TWIN|AHC_WIDE)) ? 15 : 7;
+ break;
+ }
+ }
+ else
+ {
+ min_target = target | (channel << 3);
+ max_target = min_target;
+ }
+
+
+ for (i = min_target; i <= max_target; i++)
+ {
+ if (aic7xxx_verbose & (VERBOSE_ABORT_PROCESS | VERBOSE_RESET_PROCESS))
+ printk(INFO_LEAD "Cleaning up status information "
+ "and delayed_scbs.\n", p->host_no, channel, i, lun);
+ if ( !(p->dev_flags[i] & DEVICE_TAGGED_SUCCESS) &&
+ (p->dev_active_cmds[i]) &&
+ (p->tagenable & (0x01 << i)) )
+ {
+ printk(INFO_LEAD "Device appears to be choking on tagged commands.\n",
+ p->host_no, channel, i, lun);
+ printk(INFO_LEAD "Will use untagged I/O instead.\n", p->host_no,
+ channel, i, lun);
+ p->dev_max_queue_depth[i] = 1;
+ p->dev_temp_queue_depth[i] = 1;
+ p->tagenable &= ~(0x01 << i);
+ p->orderedtag &= ~(0x01 << i);
+ }
+ p->dev_flags[i] &= ~BUS_DEVICE_RESET_PENDING;
+ if ( tag == SCB_LIST_NULL )
+ {
+ p->dev_flags[i] |= DEVICE_PRINT_WDTR | DEVICE_PRINT_SDTR;
+ p->dev_last_reset[i] = jiffies;
+ p->dev_last_queue_full_count[i] = 0;
+ p->dev_last_queue_full[i] = 0;
+ p->dev_temp_queue_depth[i] =
+ p->dev_max_queue_depth[i];
+ /*
+ * In case this isn't a full bus reset, we want to add a 4 second timer in
+ * here so that we can delay all re-sent commands for this device for the
+ * 4 seconds and then have our timer routine pick them back up.
+ */
+ if(p->dev_timer[i].expires)
+ {
+ del_timer(&p->dev_timer[i]);
+ }
+ p->dev_timer[i].expires = jiffies + (4 * HZ);
+ add_timer(&p->dev_timer[i]);
+ }
+ for(j=0; j<MAX_LUNS; j++)
+ {
+ if (channel == 1)
+ tcl = ((i << 4) & 0x70) | (channel << 3) | j;
+ else
+ tcl = (i << 4) | (channel << 3) | j;
+ if ( (aic7xxx_index_busy_target(p, tcl, FALSE) == tag) ||
+ (tag == SCB_LIST_NULL) )
+ aic7xxx_index_busy_target(p, tcl, /* unbusy */ TRUE);
+ }
+ j = 0;
+ prev_scbp = NULL;
+ scbp = p->delayed_scbs[i].head;
+ while ( (scbp != NULL) && (j++ <= (p->scb_data->numscbs + 1)) )
+ {
+ prev_scbp = scbp;
+ scbp = scbp->q_next;
+ if ( prev_scbp == scbp )
+ {
+ if (aic7xxx_verbose & (VERBOSE_ABORT | VERBOSE_RESET))
+ printk(WARN_LEAD "Yikes!! scb->q_next == scb "
+ "in the delayed_scbs queue!\n", p->host_no, channel, i, lun);
+ scbp = NULL;
+ prev_scbp->q_next = NULL;
+ p->delayed_scbs[i].tail = prev_scbp;
+ }
+ if (aic7xxx_match_scb(p, prev_scbp, target, channel, lun, tag))
+ {
+ scbq_remove(&p->delayed_scbs[i], prev_scbp);
+ if (prev_scbp->flags & SCB_WAITINGQ)
+ {
+ p->dev_active_cmds[i]++;
+ p->activescbs++;
+ }
+ prev_scbp->flags &= ~(SCB_ACTIVE | SCB_WAITINGQ);
+ prev_scbp->flags |= SCB_RESET | SCB_QUEUED_FOR_DONE;
+ }
+ }
+ if ( j > (p->scb_data->maxscbs + 1) )
+ {
+ if (aic7xxx_verbose & (VERBOSE_ABORT | VERBOSE_RESET))
+ printk(WARN_LEAD "Yikes!! There's a loop in the "
+ "delayed_scbs queue!\n", p->host_no, channel, i, lun);
+ scbq_init(&p->delayed_scbs[i]);
+ }
+ if ( (p->delayed_scbs[i].head == NULL) &&
+ (p->dev_timer[i].expires) )
+ {
+ del_timer(&p->dev_timer[i]);
+ p->dev_timer[i].expires = 0;
+ }
+ }
+ }
+
+ if (aic7xxx_verbose & (VERBOSE_ABORT_PROCESS | VERBOSE_RESET_PROCESS))
+ printk(INFO_LEAD "Cleaning QINFIFO.\n", p->host_no, channel, target, lun );
+ aic7xxx_search_qinfifo(p, target, channel, lun, tag,
+ SCB_RESET | SCB_QUEUED_FOR_DONE, /* requeue */ FALSE, NULL);
+
+/*
+ * Search the waiting_scbs queue for matches, this catches any SCB_QUEUED
+ * ABORT/RESET commands.
+ */
+ if (aic7xxx_verbose & (VERBOSE_ABORT_PROCESS | VERBOSE_RESET_PROCESS))
+ printk(INFO_LEAD "Cleaning waiting_scbs.\n", p->host_no, channel,
+ target, lun );
+ {
+ struct aic7xxx_scb *scbp, *prev_scbp;
+
+ j = 0;
+ prev_scbp = NULL;
+ scbp = p->waiting_scbs.head;
+ while ( (scbp != NULL) && (j++ <= (p->scb_data->numscbs + 1)) )
+ {
+ prev_scbp = scbp;
+ scbp = scbp->q_next;
+ if ( prev_scbp == scbp )
+ {
+ if (aic7xxx_verbose & (VERBOSE_ABORT | VERBOSE_RESET))
+ printk(WARN_LEAD "Yikes!! scb->q_next == scb "
+ "in the waiting_scbs queue!\n", p->host_no, CTL_OF_SCB(scbp));
+ scbp = NULL;
+ prev_scbp->q_next = NULL;
+ p->waiting_scbs.tail = prev_scbp;
+ }
+ if (aic7xxx_match_scb(p, prev_scbp, target, channel, lun, tag))
+ {
+ scbq_remove(&p->waiting_scbs, prev_scbp);
+ if (prev_scbp->flags & SCB_WAITINGQ)
+ {
+ p->dev_active_cmds[TARGET_INDEX(prev_scbp->cmd)]++;
+ p->activescbs++;
+ }
+ prev_scbp->flags &= ~(SCB_ACTIVE | SCB_WAITINGQ);
+ prev_scbp->flags |= SCB_RESET | SCB_QUEUED_FOR_DONE;
+ }
+ }
+ if ( j > (p->scb_data->maxscbs + 1) )
+ {
+ if (aic7xxx_verbose & (VERBOSE_ABORT | VERBOSE_RESET))
+ printk(WARN_LEAD "Yikes!! There's a loop in the "
+ "waiting_scbs queue!\n", p->host_no, channel, target, lun);
+ scbq_init(&p->waiting_scbs);
+ }
+ }
+
+
+ /*
+ * Search waiting for selection list.
+ */
+ if (aic7xxx_verbose & (VERBOSE_ABORT_PROCESS | VERBOSE_RESET_PROCESS))
+ printk(INFO_LEAD "Cleaning waiting for selection "
+ "list.\n", p->host_no, channel, target, lun);
+ {
+ unsigned char next, prev, scb_index;
+
+ next = aic_inb(p, WAITING_SCBH); /* Start at head of list. */
+ prev = SCB_LIST_NULL;
+ j = 0;
+ while ( (next != SCB_LIST_NULL) && (j++ <= (p->scb_data->maxscbs + 1)) )
+ {
+ aic_outb(p, next, SCBPTR);
+ scb_index = aic_inb(p, SCB_TAG);
+ if (scb_index >= p->scb_data->numscbs)
+ {
+ /*
+ * No aic7xxx_verbose check here.....we want to see this since it
+ * means either the kernel driver or the sequencer screwed things up
+ */
+ printk(WARN_LEAD "Waiting List inconsistency; SCB index=%d, "
+ "numscbs=%d\n", p->host_no, channel, target, lun, scb_index,
+ p->scb_data->numscbs);
+ next = aic_inb(p, SCB_NEXT);
+ aic7xxx_add_curscb_to_free_list(p);
+ }
+ else
+ {
+ scbp = p->scb_data->scb_array[scb_index];
+ if (aic7xxx_match_scb(p, scbp, target, channel, lun, tag))
+ {
+ next = aic7xxx_abort_waiting_scb(p, scbp, next, prev);
+ if (scbp->flags & SCB_WAITINGQ)
+ {
+ p->dev_active_cmds[TARGET_INDEX(scbp->cmd)]++;
+ p->activescbs++;
+ }
+ scbp->flags &= ~(SCB_ACTIVE | SCB_WAITINGQ);
+ scbp->flags |= SCB_RESET | SCB_QUEUED_FOR_DONE;
+ if (prev == SCB_LIST_NULL)
+ {
+ /*
+ * This is either the first scb on the waiting list, or we
+ * have already yanked the first and haven't left any behind.
+ * Either way, we need to turn off the selection hardware if
+ * it isn't already off.
+ */
+ aic_outb(p, aic_inb(p, SCSISEQ) & ~ENSELO, SCSISEQ);
+ aic_outb(p, CLRSELTIMEO, CLRSINT1);
+ }
+ }
+ else
+ {
+ prev = next;
+ next = aic_inb(p, SCB_NEXT);
+ }
+ }
+ }
+ if ( j > (p->scb_data->maxscbs + 1) )
+ {
+ printk(WARN_LEAD "Yikes!! There is a loop in the waiting for "
+ "selection list!\n", p->host_no, channel, target, lun);
+ init_lists = TRUE;
+ }
+ }
+
+ /*
+ * Go through disconnected list and remove any entries we have queued
+ * for completion, zeroing their control byte too.
+ */
+ if (aic7xxx_verbose & (VERBOSE_ABORT_PROCESS | VERBOSE_RESET_PROCESS))
+ printk(INFO_LEAD "Cleaning disconnected scbs "
+ "list.\n", p->host_no, channel, target, lun);
+ if (p->features & AHC_PAGESCBS)
+ {
+ unsigned char next, prev, scb_index;
+
+ next = aic_inb(p, DISCONNECTED_SCBH);
+ prev = SCB_LIST_NULL;
+ j = 0;
+ while ( (next != SCB_LIST_NULL) && (j++ <= (p->scb_data->maxscbs + 1)) )
+ {
+ aic_outb(p, next, SCBPTR);
+ scb_index = aic_inb(p, SCB_TAG);
+ if (scb_index > p->scb_data->numscbs)
+ {
+ printk(WARN_LEAD "Disconnected List inconsistency; SCB index=%d, "
+ "numscbs=%d\n", p->host_no, channel, target, lun, scb_index,
+ p->scb_data->numscbs);
+ next = aic7xxx_rem_scb_from_disc_list(p, next);
+ }
+ else
+ {
+ scbp = p->scb_data->scb_array[scb_index];
+ if (aic7xxx_match_scb(p, scbp, target, channel, lun, tag))
+ {
+ next = aic7xxx_rem_scb_from_disc_list(p, next);
+ if (scbp->flags & SCB_WAITINGQ)
+ {
+ p->dev_active_cmds[TARGET_INDEX(scbp->cmd)]++;
+ p->activescbs++;
+ }
+ scbp->flags &= ~(SCB_ACTIVE | SCB_WAITINGQ);
+ scbp->flags |= SCB_RESET | SCB_QUEUED_FOR_DONE;
+ scbp->hscb->control = 0;
+ }
+ else
+ {
+ prev = next;
+ next = aic_inb(p, SCB_NEXT);
+ }
+ }
+ }
+ if ( j > (p->scb_data->maxscbs + 1) )
+ {
+ printk(WARN_LEAD "Yikes!! There is a loop in the disconnected list!\n",
+ p->host_no, channel, target, lun);
+ init_lists = TRUE;
+ }
+ }
+
+ /*
+ * Walk the free list making sure no entries on the free list have
+ * a valid SCB_TAG value or SCB_CONTROL byte.
+ */
+ if (p->features & AHC_PAGESCBS)
+ {
+ unsigned char next;
+
+ j = 0;
+ next = aic_inb(p, FREE_SCBH);
+ if ( (next >= p->scb_data->maxhscbs) && (next != SCB_LIST_NULL) )
+ {
+ printk(WARN_LEAD "Bogus FREE_SCBH!.\n", p->host_no, channel,
+ target, lun);
+ init_lists = TRUE;
+ next = SCB_LIST_NULL;
+ }
+ while ( (next != SCB_LIST_NULL) && (j++ <= (p->scb_data->maxscbs + 1)) )
+ {
+ aic_outb(p, next, SCBPTR);
+ if (aic_inb(p, SCB_TAG) < p->scb_data->numscbs)
+ {
+ printk(WARN_LEAD "Free list inconsistency!.\n", p->host_no, channel,
+ target, lun);
+ init_lists = TRUE;
+ next = SCB_LIST_NULL;
+ }
+ else
+ {
+ aic_outb(p, SCB_LIST_NULL, SCB_TAG);
+ aic_outb(p, 0, SCB_CONTROL);
+ next = aic_inb(p, SCB_NEXT);
+ }
+ }
+ if ( j > (p->scb_data->maxscbs + 1) )
+ {
+ printk(WARN_LEAD "Yikes!! There is a loop in the free list!\n",
+ p->host_no, channel, target, lun);
+ init_lists = TRUE;
+ }
+ }
+
+ /*
+ * Go through the hardware SCB array looking for commands that
+ * were active but not on any list.
+ */
+ if (init_lists)
+ {
+ aic_outb(p, SCB_LIST_NULL, FREE_SCBH);
+ aic_outb(p, SCB_LIST_NULL, WAITING_SCBH);
+ aic_outb(p, SCB_LIST_NULL, DISCONNECTED_SCBH);
+ }
+ for (i = p->scb_data->maxhscbs - 1; i >= 0; i--)
+ {
+ unsigned char scbid;
+
+ aic_outb(p, i, SCBPTR);
+ if (init_lists)
+ {
+ aic_outb(p, SCB_LIST_NULL, SCB_TAG);
+ aic_outb(p, SCB_LIST_NULL, SCB_NEXT);
+ aic_outb(p, SCB_LIST_NULL, SCB_PREV);
+ aic_outb(p, 0, SCB_CONTROL);
+ aic7xxx_add_curscb_to_free_list(p);
+ }
+ else
+ {
+ scbid = aic_inb(p, SCB_TAG);
+ if (scbid < p->scb_data->numscbs)
+ {
+ scbp = p->scb_data->scb_array[scbid];
+ if (aic7xxx_match_scb(p, scbp, target, channel, lun, tag))
+ {
+ aic_outb(p, 0, SCB_CONTROL);
+ aic_outb(p, SCB_LIST_NULL, SCB_TAG);
+ aic7xxx_add_curscb_to_free_list(p);
+ }
+ }
+ }
+ }
+
+ /*
+ * Go through the entire SCB array now and look for commands for
+ * for this target that are stillactive. These are other (most likely
+ * tagged) commands that were disconnected when the reset occurred.
+ * Any commands we find here we know this about, it wasn't on any queue,
+ * it wasn't in the qinfifo, it wasn't in the disconnected or waiting
+ * lists, so it really must have been a paged out SCB. In that case,
+ * we shouldn't need to bother with updating any counters, just mark
+ * the correct flags and go on.
+ */
+ for (i = 0; i < p->scb_data->numscbs; i++)
+ {
+ scbp = p->scb_data->scb_array[i];
+ if ((scbp->flags & SCB_ACTIVE) &&
+ aic7xxx_match_scb(p, scbp, target, channel, lun, tag) &&
+ !aic7xxx_scb_on_qoutfifo(p, scbp))
+ {
+ if (scbp->flags & SCB_WAITINGQ)
+ {
+ scbq_remove(&p->waiting_scbs, scbp);
+ scbq_remove(&p->delayed_scbs[TARGET_INDEX(scbp->cmd)], scbp);
+ p->dev_active_cmds[TARGET_INDEX(scbp->cmd)]++;
+ p->activescbs++;
+ }
+ scbp->flags |= SCB_RESET | SCB_QUEUED_FOR_DONE;
+ scbp->flags &= ~(SCB_ACTIVE | SCB_WAITINGQ);
+ }
+ }
+
+ aic_outb(p, active_scb, SCBPTR);
+}
+
+
+/*+F*************************************************************************
+ * Function:
+ * aic7xxx_clear_intstat
+ *
+ * Description:
+ * Clears the interrupt status.
+ *-F*************************************************************************/
+static void
+aic7xxx_clear_intstat(struct aic7xxx_host *p)
+{
+ /* Clear any interrupt conditions this may have caused. */
+ aic_outb(p, CLRSELDO | CLRSELDI | CLRSELINGO, CLRSINT0);
+ aic_outb(p, CLRSELTIMEO | CLRATNO | CLRSCSIRSTI | CLRBUSFREE | CLRSCSIPERR |
+ CLRPHASECHG | CLRREQINIT, CLRSINT1);
+ aic_outb(p, CLRSCSIINT | CLRSEQINT | CLRBRKADRINT | CLRPARERR, CLRINT);
+}
+
+/*+F*************************************************************************
+ * Function:
+ * aic7xxx_reset_current_bus
+ *
+ * Description:
+ * Reset the current SCSI bus.
+ *-F*************************************************************************/
+static void
+aic7xxx_reset_current_bus(struct aic7xxx_host *p)
+{
+
+ /* Disable reset interrupts. */
+ aic_outb(p, aic_inb(p, SIMODE1) & ~ENSCSIRST, SIMODE1);
+
+ /* Turn off the bus' current operations, after all, we shouldn't have any
+ * valid commands left to cause a RSELI and SELO once we've tossed the
+ * bus away with this reset, so we might as well shut down the sequencer
+ * until the bus is restarted as oppossed to saving the current settings
+ * and restoring them (which makes no sense to me). */
+
+ /* Turn on the bus reset. */
+ aic_outb(p, aic_inb(p, SCSISEQ) | SCSIRSTO, SCSISEQ);
+ while ( (aic_inb(p, SCSISEQ) & SCSIRSTO) == 0)
+ mdelay(5);
+
+ mdelay(10);
+
+ /* Turn off the bus reset. */
+ aic_outb(p, 0, SCSISEQ);
+ mdelay(5);
+
+ aic7xxx_clear_intstat(p);
+ /* Re-enable reset interrupts. */
+ aic_outb(p, aic_inb(p, SIMODE1) | ENSCSIRST, SIMODE1);
+
+}
+
+/*+F*************************************************************************
+ * Function:
+ * aic7xxx_reset_channel
+ *
+ * Description:
+ * Reset the channel.
+ *-F*************************************************************************/
+static void
+aic7xxx_reset_channel(struct aic7xxx_host *p, int channel, int initiate_reset)
+{
+ unsigned long offset_min, offset_max;
+ unsigned char sblkctl;
+ int cur_channel;
+
+ if (aic7xxx_verbose & VERBOSE_RESET_PROCESS)
+ printk(INFO_LEAD "Reset channel called, %s initiate reset.\n",
+ p->host_no, channel, -1, -1, (initiate_reset==TRUE) ? "will" : "won't" );
+
+
+ if (channel == 1)
+ {
+ p->needsdtr |= (p->needsdtr_copy & 0xFF00);
+ p->sdtr_pending &= 0x00FF;
+ offset_min = 8;
+ offset_max = 16;
+ }
+ else
+ {
+ if (p->features & AHC_WIDE)
+ {
+ p->needsdtr = p->needsdtr_copy;
+ p->needwdtr = p->needwdtr_copy;
+ p->sdtr_pending = 0x0;
+ p->wdtr_pending = 0x0;
+ offset_min = 0;
+ offset_max = 16;
+ }
+ else
+ {
+ /* Channel A */
+ p->needsdtr |= (p->needsdtr_copy & 0x00FF);
+ p->sdtr_pending &= 0xFF00;
+ offset_min = 0;
+ offset_max = 8;
+ }
+ }
+
+ while (offset_min < offset_max)
+ {
+ /*
+ * Revert to async/narrow transfers until we renegotiate.
+ */
+ aic_outb(p, 0, TARG_SCSIRATE + offset_min);
+ if (p->features & AHC_ULTRA2)
+ {
+ aic_outb(p, 0, TARG_OFFSET + offset_min);
+ }
+ offset_min++;
+ }
+
+ /*
+ * Reset the bus and unpause/restart the controller
+ */
+ sblkctl = aic_inb(p, SBLKCTL);
+ if ( (p->chip & AHC_CHIPID_MASK) == AHC_AIC7770 )
+ cur_channel = (sblkctl & SELBUSB) >> 3;
+ else
+ cur_channel = 0;
+ if ( (cur_channel != channel) && (p->features & AHC_TWIN) )
+ {
+ /*
+ * Case 1: Command for another bus is active
+ */
+ if (aic7xxx_verbose & VERBOSE_RESET_PROCESS)
+ printk(INFO_LEAD "Stealthily resetting idle channel.\n", p->host_no,
+ channel, -1, -1);
+ /*
+ * Stealthily reset the other bus without upsetting the current bus.
+ */
+ aic_outb(p, sblkctl ^ SELBUSB, SBLKCTL);
+ aic_outb(p, aic_inb(p, SIMODE1) & ~ENBUSFREE, SIMODE1);
+ if (initiate_reset)
+ {
+ aic7xxx_reset_current_bus(p);
+ }
+ aic_outb(p, aic_inb(p, SCSISEQ) & (ENSELI|ENRSELI|ENAUTOATNP), SCSISEQ);
+ aic7xxx_clear_intstat(p);
+ aic_outb(p, sblkctl, SBLKCTL);
+ }
+ else
+ {
+ /*
+ * Case 2: A command from this bus is active or we're idle.
+ */
+ if (aic7xxx_verbose & VERBOSE_RESET_PROCESS)
+ printk(INFO_LEAD "Resetting currently active channel.\n", p->host_no,
+ channel, -1, -1);
+ aic_outb(p, aic_inb(p, SIMODE1) & ~(ENBUSFREE|ENREQINIT),
+ SIMODE1);
+ p->flags &= ~AHC_HANDLING_REQINITS;
+ p->msg_type = MSG_TYPE_NONE;
+ p->msg_len = 0;
+ if (initiate_reset)
+ {
+ aic7xxx_reset_current_bus(p);
+ }
+ aic_outb(p, aic_inb(p, SCSISEQ) & (ENSELI|ENRSELI|ENAUTOATNP), SCSISEQ);
+ aic7xxx_clear_intstat(p);
+ }
+ if (aic7xxx_verbose & VERBOSE_RESET_RETURN)
+ printk(INFO_LEAD "Channel reset\n", p->host_no, channel, -1, -1);
+ /*
+ * Clean up all the state information for the pending transactions
+ * on this bus.
+ */
+ aic7xxx_reset_device(p, ALL_TARGETS, channel, ALL_LUNS, SCB_LIST_NULL);
+
+ /*
+ * Convince Mid Level SCSI code to leave us be for a little bit...
+ */
+ p->last_reset = jiffies;
+ p->host->last_reset = (jiffies + (HZ * AIC7XXX_RESET_DELAY));
+
+ if ( !(p->features & AHC_TWIN) )
+ {
+ restart_sequencer(p);
+ }
+
+ return;
+}
+
+/*+F*************************************************************************
+ * Function:
+ * aic7xxx_run_waiting_queues
+ *
+ * Description:
+ * Scan the awaiting_scbs queue downloading and starting as many
+ * scbs as we can.
+ *-F*************************************************************************/
+static void
+aic7xxx_run_waiting_queues(struct aic7xxx_host *p)
+{
+ struct aic7xxx_scb *scb;
+ int tindex;
+ int sent;
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,1,95)
+ unsigned long cpu_flags = 0;
+#endif
+
+
+ if (p->waiting_scbs.head == NULL)
+ return;
+
+ sent = 0;
+
+ /*
+ * First handle SCBs that are waiting but have been assigned a slot.
+ */
+ DRIVER_LOCK
+ while ((scb = scbq_remove_head(&p->waiting_scbs)) != NULL)
+ {
+ tindex = TARGET_INDEX(scb->cmd);
+ if ( !scb->tag_action && (p->tagenable & (1<<tindex)) )
+ {
+#ifdef AIC7XXX_VERBOSE_DEBUGGING
+ if (aic7xxx_verbose > 0xffff)
+ printk(INFO_LEAD "Reducing Queue depth for untagged command.\n",
+ p->host_no, CTL_OF_SCB(scb));
+#endif
+ p->dev_temp_queue_depth[tindex] = 1;
+ }
+ if ( (p->dev_active_cmds[tindex] >=
+ p->dev_temp_queue_depth[tindex]) ||
+ (p->dev_last_reset[tindex] >= (jiffies - (4 * HZ))) )
+ {
+#ifdef AIC7XXX_VERBOSE_DEBUGGING
+ if (aic7xxx_verbose > 0xffff)
+ printk(INFO_LEAD "Moving SCB to Delayed Queue.\n",
+ p->host_no, CTL_OF_SCB(scb));
+#endif
+ scbq_insert_tail(&p->delayed_scbs[tindex], scb);
+ if ( !(p->dev_timer[tindex].expires) &&
+ !(p->dev_active_cmds[tindex]) )
+ {
+ p->dev_timer[tindex].expires = p->dev_last_reset[tindex] + (4 * HZ);
+ add_timer(&p->dev_timer[tindex]);
+ }
+ }
+ else
+ {
+ scb->flags &= ~SCB_WAITINGQ;
+#ifdef AIC7XXX_VERBOSE_DEBUGGING
+ if (aic7xxx_verbose > 0xffff)
+ printk(INFO_LEAD "Sending command %d/0x%x to QINFIFO\n", p->host_no,
+ CTL_OF_SCB(scb), scb->hscb->tag, scb->flags);
+#endif
+ p->dev_active_cmds[tindex]++;
+ p->activescbs++;
+ if ( !(scb->tag_action) )
+ {
+ aic7xxx_busy_target(p, scb);
+ }
+ p->qinfifo[p->qinfifonext++] = scb->hscb->tag;
+ sent++;
+ }
+ }
+ if (sent)
+ {
+#ifdef AIC7XXX_VERBOSE_DEBUGGING
+ if (aic7xxx_verbose > 0xffff)
+ {
+ printk(INFO_LEAD "Sending commands to QINFIFO\n", p->host_no,
+ -1, -1, -1);
+ if ( (p->isr_count < 16) && (aic7xxx_panic_on_abort) &&
+ (p->flags & AHC_PAGESCBS) )
+ aic7xxx_check_scbs(p, "While sending commands to QINFIFO");
+ }
+#endif
+ if (p->features & AHC_QUEUE_REGS)
+ aic_outb(p, p->qinfifonext, HNSCB_QOFF);
+ else
+ {
+ pause_sequencer(p);
+ aic_outb(p, p->qinfifonext, KERNEL_QINPOS);
+ unpause_sequencer(p, FALSE);
+ }
+ if (p->activescbs > p->max_activescbs)
+ p->max_activescbs = p->activescbs;
+ }
+ DRIVER_UNLOCK
+}
+
+#ifdef CONFIG_PCI
+
+#define DPE 0x80
+#define SSE 0x40
+#define RMA 0x20
+#define RTA 0x10
+#define STA 0x08
+#define DPR 0x01
+
+/*+F*************************************************************************
+ * Function:
+ * aic7xxx_pci_intr
+ *
+ * Description:
+ * Check the scsi card for PCI errors and clear the interrupt
+ *
+ * NOTE: If you don't have this function and a 2940 card encounters
+ * a PCI error condition, the machine will end up locked as the
+ * interrupt handler gets slammed with non-stop PCI error interrupts
+ *-F*************************************************************************/
+static void
+aic7xxx_pci_intr(struct aic7xxx_host *p)
+{
+ unsigned char status1;
+
+#if LINUX_VERSION_CODE > KERNEL_VERSION(2,1,92)
+ pci_read_config_byte(p->pdev, PCI_STATUS + 1, &status1);
+#else
+ pcibios_read_config_byte(p->pci_bus, p->pci_device_fn,
+ PCI_STATUS + 1, &status1);
+#endif
+
+ if ( (status1 & DPE) && (aic7xxx_verbose & VERBOSE_MINOR_ERROR) )
+ printk(WARN_LEAD "Data Parity Error during PCI address or PCI write"
+ "phase.\n", p->host_no, -1, -1, -1);
+ if ( (status1 & SSE) && (aic7xxx_verbose & VERBOSE_MINOR_ERROR) )
+ printk(WARN_LEAD "Signal System Error Detected\n", p->host_no,
+ -1, -1, -1);
+ if ( (status1 & RMA) && (aic7xxx_verbose & VERBOSE_MINOR_ERROR) )
+ printk(WARN_LEAD "Received a PCI Master Abort\n", p->host_no,
+ -1, -1, -1);
+ if ( (status1 & RTA) && (aic7xxx_verbose & VERBOSE_MINOR_ERROR) )
+ printk(WARN_LEAD "Received a PCI Target Abort\n", p->host_no,
+ -1, -1, -1);
+ if ( (status1 & STA) && (aic7xxx_verbose & VERBOSE_MINOR_ERROR) )
+ printk(WARN_LEAD "Signaled a PCI Target Abort\n", p->host_no,
+ -1, -1, -1);
+ if ( (status1 & DPR) && (aic7xxx_verbose & VERBOSE_MINOR_ERROR) )
+ printk(WARN_LEAD "Data Parity Error has been reported via PCI pin "
+ "PERR#\n", p->host_no, -1, -1, -1);
+
+#if LINUX_VERSION_CODE > KERNEL_VERSION(2,1,92)
+ pci_write_config_byte(p->pdev, PCI_STATUS + 1, status1);
+#else
+ pcibios_write_config_byte(p->pci_bus, p->pci_device_fn,
+ PCI_STATUS + 1, status1);
+#endif
+ if (status1 & (DPR|RMA|RTA))
+ aic_outb(p, CLRPARERR, CLRINT);
+
+ if ( (aic7xxx_panic_on_abort) && (p->spurious_int > 500) )
+ aic7xxx_panic_abort(p, NULL);
+
+}
+#endif /* CONFIG_PCI */
+
+/*+F*************************************************************************
+ * Function:
+ * aic7xxx_timer
+ *
+ * Description:
+ * Take expired extries off of delayed queues and place on waiting queue
+ * then run waiting queue to start commands.
+ ***************************************************************************/
+static void
+aic7xxx_timer(struct aic7xxx_host *p)
+{
+ int i, j;
+ unsigned long cpu_flags = 0;
+ struct aic7xxx_scb *scb;
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,1,95)
+ DRIVER_LOCK
+#else
+ spin_lock_irqsave(&io_request_lock, cpu_flags);
+#endif
+ for(i=0; i<MAX_TARGETS; i++)
+ {
+ if ( (p->dev_timer[i].expires) &&
+ (p->dev_timer[i].expires <= jiffies) )
+ {
+ p->dev_timer[i].expires = 0;
+ if ( (p->dev_timer[i].prev != NULL) ||
+ (p->dev_timer[i].next != NULL) )
+ {
+ del_timer(&p->dev_timer[i]);
+ }
+ p->dev_temp_queue_depth[i] = p->dev_max_queue_depth[i];
+ j = 0;
+ while ( ((scb = scbq_remove_head(&p->delayed_scbs[i])) != NULL) &&
+ (j++ < p->scb_data->numscbs) )
+ {
+ scbq_insert_tail(&p->waiting_scbs, scb);
+ }
+ if (j == p->scb_data->numscbs)
+ {
+ printk(INFO_LEAD "timer: Yikes, loop in delayed_scbs list.\n",
+ p->host_no, 0, i, -1);
+ scbq_init(&p->delayed_scbs[i]);
+ scbq_init(&p->waiting_scbs);
+ /*
+ * Well, things are screwed now, wait for a reset to clean the junk
+ * out.
+ */
+ }
+ }
+ }
+ aic7xxx_run_waiting_queues(p);
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,1,95)
+ DRIVER_UNLOCK
+#else
+ spin_unlock_irqrestore(&io_request_lock, cpu_flags);
+#endif
+}
+
+/*+F*************************************************************************
+ * Function:
+ * aic7xxx_construct_sdtr
+ *
+ * Description:
+ * Constucts a synchronous data transfer message in the message
+ * buffer on the sequencer.
+ *-F*************************************************************************/
+static void
+aic7xxx_construct_sdtr(struct aic7xxx_host *p, unsigned char period,
+ unsigned char offset)
+{
+ p->msg_buf[p->msg_index++] = MSG_EXTENDED;
+ p->msg_buf[p->msg_index++] = MSG_EXT_SDTR_LEN;
+ p->msg_buf[p->msg_index++] = MSG_EXT_SDTR;
+ p->msg_buf[p->msg_index++] = period;
+ p->msg_buf[p->msg_index++] = offset;
+ p->msg_len += 5;
+}
+
+/*+F*************************************************************************
+ * Function:
+ * aic7xxx_construct_wdtr
+ *
+ * Description:
+ * Constucts a wide data transfer message in the message buffer
+ * on the sequencer.
+ *-F*************************************************************************/
+static void
+aic7xxx_construct_wdtr(struct aic7xxx_host *p, unsigned char bus_width)
+{
+ p->msg_buf[p->msg_index++] = MSG_EXTENDED;
+ p->msg_buf[p->msg_index++] = MSG_EXT_WDTR_LEN;
+ p->msg_buf[p->msg_index++] = MSG_EXT_WDTR;
+ p->msg_buf[p->msg_index++] = bus_width;
+ p->msg_len += 4;
+}
+
+/*+F*************************************************************************
+ * Function:
+ * aic7xxx_calc_residual
+ *
+ * Description:
+ * Calculate the residual data not yet transferred.
+ *-F*************************************************************************/
+static void
+aic7xxx_calculate_residual (struct aic7xxx_host *p, struct aic7xxx_scb *scb)
+{
+ struct aic7xxx_hwscb *hscb;
+ Scsi_Cmnd *cmd;
+ int actual, i;
+
+ cmd = scb->cmd;
+ hscb = scb->hscb;
+
+ /*
+ * Don't destroy valid residual information with
+ * residual coming from a check sense operation.
+ */
+ if (((scb->hscb->control & DISCONNECTED) == 0) &&
+ (scb->flags & SCB_SENSE) == 0)
+ {
+ /*
+ * We had an underflow. At this time, there's only
+ * one other driver that bothers to check for this,
+ * and cmd->underflow seems to be set rather half-
+ * heartedly in the higher-level SCSI code.
+ */
+ actual = scb->sg_length;
+ for (i=1; i < hscb->residual_SG_segment_count; i++)
+ {
+ actual -= scb->sg_list[scb->sg_count - i].length;
+ }
+ actual -= (hscb->residual_data_count[2] << 16) |
+ (hscb->residual_data_count[1] << 8) |
+ hscb->residual_data_count[0];
+
+ if (actual < cmd->underflow)
+ {
+ if (aic7xxx_verbose & VERBOSE_MINOR_ERROR)
+ printk(INFO_LEAD "Underflow - Wanted %u, %s %u, residual SG "
+ "count %d.\n", p->host_no, CTL_OF_SCB(scb), cmd->underflow,
+ (cmd->request.cmd == WRITE) ? "wrote" : "read", actual,
+ hscb->residual_SG_segment_count);
+ aic7xxx_error(cmd) = DID_RETRY_COMMAND;
+ aic7xxx_status(cmd) = hscb->target_status;
+ }
+ }
+
+ /*
+ * Clean out the residual information in the SCB for the
+ * next consumer.
+ */
+ hscb->residual_data_count[2] = 0;
+ hscb->residual_data_count[1] = 0;
+ hscb->residual_data_count[0] = 0;
+ hscb->residual_SG_segment_count = 0;
+}
+
+/*+F*************************************************************************
+ * Function:
+ * aic7xxx_handle_device_reset
+ *
+ * Description:
+ * Interrupt handler for sequencer interrupts (SEQINT).
+ *-F*************************************************************************/
+static void
+aic7xxx_handle_device_reset(struct aic7xxx_host *p, int target, int channel)
+{
+ unsigned short targ_mask;
+ unsigned char tindex = target;
+
+ tindex |= ((channel & 0x01) << 3);
+
+ targ_mask = (0x01 << tindex);
+ /*
+ * Go back to async/narrow transfers and renegotiate.
+ */
+ p->needsdtr |= (p->needsdtr_copy & targ_mask);
+ p->needwdtr |= (p->needwdtr_copy & targ_mask);
+ p->sdtr_pending &= ~targ_mask;
+ p->wdtr_pending &= ~targ_mask;
+ aic_outb(p, 0, TARG_SCSIRATE + tindex);
+ if (p->features & AHC_ULTRA2)
+ aic_outb(p, 0, TARG_OFFSET + tindex);
+ aic7xxx_reset_device(p, target, channel, ALL_LUNS, SCB_LIST_NULL);
+ if (aic7xxx_verbose & VERBOSE_RESET_PROCESS)
+ printk(INFO_LEAD "Bus Device Reset delivered.\n", p->host_no, channel,
+ target, -1);
+ aic7xxx_run_done_queue(p, /*complete*/ FALSE);
+}
+
+/*+F*************************************************************************
+ * Function:
+ * aic7xxx_handle_seqint
+ *
+ * Description:
+ * Interrupt handler for sequencer interrupts (SEQINT).
+ *-F*************************************************************************/
+static void
+aic7xxx_handle_seqint(struct aic7xxx_host *p, unsigned char intstat)
+{
+ struct aic7xxx_scb *scb;
+ unsigned short target_mask;
+ unsigned char target, lun, tindex;
+ unsigned char queue_flag = FALSE;
+ char channel;
+
+ target = ((aic_inb(p, SAVED_TCL) >> 4) & 0x0f);
+ if ( (p->chip & AHC_CHIPID_MASK) == AHC_AIC7770 )
+ channel = (aic_inb(p, SBLKCTL) & SELBUSB) >> 3;
+ else
+ channel = 0;
+ tindex = target + (channel << 3);
+ lun = aic_inb(p, SAVED_TCL) & 0x07;
+ target_mask = (0x01 << tindex);
+
+ /*
+ * Go ahead and clear the SEQINT now, that avoids any interrupt race
+ * conditions later on in case we enable some other interrupt.
+ */
+ aic_outb(p, CLRSEQINT, CLRINT);
+ switch (intstat & SEQINT_MASK)
+ {
+ case NO_MATCH:
+ {
+ aic_outb(p, aic_inb(p, SCSISEQ) & (ENSELI|ENRSELI|ENAUTOATNP),
+ SCSISEQ);
+ printk(WARN_LEAD "No active SCB for reconnecting target - Issuing "
+ "BUS DEVICE RESET.\n", p->host_no, channel, target, lun);
+ printk(WARN_LEAD " SAVED_TCL=0x%x, ARG_1=0x%x, SEQADDR=0x%x\n",
+ p->host_no, channel, target, lun,
+ aic_inb(p, SAVED_TCL), aic_inb(p, ARG_1),
+ (aic_inb(p, SEQADDR1) << 8) | aic_inb(p, SEQADDR0));
+ }
+ break;
+
+ case SEND_REJECT:
+ {
+ if (aic7xxx_verbose & VERBOSE_MINOR_ERROR)
+ printk(INFO_LEAD "Rejecting unknown message (0x%x) received from "
+ "target, SEQ_FLAGS=0x%x\n", p->host_no, channel, target, lun,
+ aic_inb(p, ACCUM), aic_inb(p, SEQ_FLAGS));
+ }
+ break;
+
+ case NO_IDENT:
+ {
+ /*
+ * The reconnecting target either did not send an identify
+ * message, or did, but we didn't find an SCB to match and
+ * before it could respond to our ATN/abort, it hit a dataphase.
+ * The only safe thing to do is to blow it away with a bus
+ * reset.
+ */
+ if (aic7xxx_verbose & (VERBOSE_SEQINT | VERBOSE_RESET_MID))
+ printk(INFO_LEAD "Target did not send an IDENTIFY message; "
+ "LASTPHASE 0x%x, SAVED_TCL 0x%x\n", p->host_no, channel, target,
+ lun, aic_inb(p, LASTPHASE), aic_inb(p, SAVED_TCL));
+
+ aic7xxx_reset_channel(p, channel, /*initiate reset*/ TRUE);
+ aic7xxx_run_done_queue(p, FALSE);
+
+ }
+ break;
+
+ case BAD_PHASE:
+ if (aic_inb(p, LASTPHASE) == P_BUSFREE)
+ {
+ if (aic7xxx_verbose & VERBOSE_SEQINT)
+ printk(INFO_LEAD "Missed busfree.\n", p->host_no, channel,
+ target, lun);
+ restart_sequencer(p);
+ }
+ else
+ {
+ if (aic7xxx_verbose & VERBOSE_SEQINT)
+ printk(INFO_LEAD "Unknown scsi bus phase, continuing\n", p->host_no,
+ channel, target, lun);
+ }
+ break;
+
+ case EXTENDED_MSG:
+ {
+ p->msg_type = MSG_TYPE_INITIATOR_MSGIN;
+ p->msg_len = 0;
+ p->msg_index = 0;
+
+#ifdef AIC7XXX_VERBOSE_DEBUGGING
+ if (aic7xxx_verbose > 0xffff)
+ printk(INFO_LEAD "Enabling REQINITs for MSG_IN\n", p->host_no,
+ channel, target, lun);
+#endif
+
+ /*
+ * To actually receive the message, simply turn on
+ * REQINIT interrupts and let our interrupt handler
+ * do the rest (REQINIT should already be true).
+ */
+ p->flags |= AHC_HANDLING_REQINITS;
+ aic_outb(p, aic_inb(p, SIMODE1) | ENREQINIT, SIMODE1);
+
+ /*
+ * We don't want the sequencer unpaused yet so we return early
+ */
+ return;
+ }
+
+ case REJECT_MSG:
+ {
+ /*
+ * What we care about here is if we had an outstanding SDTR
+ * or WDTR message for this target. If we did, this is a
+ * signal that the target is refusing negotiation.
+ */
+ unsigned char scb_index;
+ unsigned char last_msg;
+
+ scb_index = aic_inb(p, SCB_TAG);
+ scb = p->scb_data->scb_array[scb_index];
+ last_msg = aic_inb(p, LAST_MSG);
+
+ if ( (last_msg == MSG_IDENTIFYFLAG) &&
+ (scb->tag_action) &&
+ !(scb->flags & SCB_MSGOUT_BITS) )
+ {
+ if ((scb->tag_action == MSG_ORDERED_Q_TAG) &&
+ (p->dev_flags[tindex] & DEVICE_TAGGED_SUCCESS))
+ {
+ /*
+ * OK...the device seems able to accept tagged commands, but
+ * not ordered tag commands, only simple tag commands. So, we
+ * disable ordered tag commands and go on with life just like
+ * normal.
+ */
+ p->orderedtag &= ~target_mask;
+ scb->tag_action = MSG_SIMPLE_Q_TAG;
+ scb->hscb->control &= ~SCB_TAG_TYPE;
+ scb->hscb->control |= MSG_SIMPLE_Q_TAG;
+ aic_outb(p, scb->hscb->control, SCB_CONTROL);
+ /*
+ * OK..we set the tag type to simple tag command, now we re-assert
+ * ATNO and hope this will take us into the identify phase again
+ * so we can resend the tag type and info to the device.
+ */
+ aic_outb(p, MSG_IDENTIFYFLAG, MSG_OUT);
+ aic_outb(p, aic_inb(p, SCSISIGI) | ATNO, SCSISIGO);
+ }
+ else if ( (scb->tag_action == MSG_SIMPLE_Q_TAG) &&
+ !(p->dev_flags[tindex] & DEVICE_TAGGED_SUCCESS) )
+ {
+ unsigned char i, reset = 0;
+ struct aic7xxx_scb *scbp;
+ int old_verbose;
+ /*
+ * Hmmmm....the device is flaking out on tagged commands. The
+ * bad thing is that we already have tagged commands enabled in
+ * the device struct in the mid level code. We also have a queue
+ * set according to the tagged queue depth. Gonna have to live
+ * with it by controlling our queue depth internally and making
+ * sure we don't set the tagged command flag any more.
+ */
+ p->tagenable &= ~target_mask;
+ p->orderedtag &= ~target_mask;
+ p->dev_max_queue_depth[tindex] =
+ p->dev_temp_queue_depth[tindex] = 1;
+ /*
+ * We set this command up as a bus device reset. However, we have
+ * to clear the tag type as it's causing us problems. We shouldnt
+ * have to worry about any other commands being active, since if
+ * the device is refusing tagged commands, this should be the
+ * first tagged command sent to the device, however, we do have
+ * to worry about any other tagged commands that may already be
+ * in the qinfifo. The easiest way to do this, is to issue a BDR,
+ * send all the commands back to the mid level code, then let them
+ * come back and get rebuilt as untagged commands.
+ */
+ scb->tag_action = 0;
+ scb->hscb->control &= ~(TAG_ENB | SCB_TAG_TYPE);
+ aic_outb(p, scb->hscb->control, SCB_CONTROL);
+
+ old_verbose = aic7xxx_verbose;
+ aic7xxx_verbose &= ~(VERBOSE_RESET|VERBOSE_ABORT);
+ for (i=0; i!=p->scb_data->numscbs; i++)
+ {
+ scbp = p->scb_data->scb_array[i];
+ if ((scbp->flags & SCB_ACTIVE) && (scbp != scb))
+ {
+ if (aic7xxx_match_scb(p, scbp, target, channel, lun, i))
+ {
+ aic7xxx_reset_device(p, target, channel, lun, i);
+ reset++;
+ }
+ aic7xxx_run_done_queue(p, FALSE);
+ }
+ }
+ aic7xxx_verbose = old_verbose;
+ /*
+ * Wait until after the for loop to set the busy index since
+ * aic7xxx_reset_device will clear the busy index during its
+ * operation.
+ */
+ aic7xxx_busy_target(p, scb);
+ printk(INFO_LEAD "Device is refusing tagged commands, using "
+ "untagged I/O.\n", p->host_no, channel, target, lun);
+ aic_outb(p, MSG_IDENTIFYFLAG, MSG_OUT);
+ aic_outb(p, aic_inb(p, SCSISIGI) | ATNO, SCSISIGO);
+ }
+ }
+ else if (scb->flags & SCB_MSGOUT_WDTR)
+ {
+ /*
+ * note 8bit xfers and clear flag
+ */
+ p->needwdtr &= ~target_mask;
+ p->needwdtr_copy &= ~target_mask;
+ p->wdtr_pending &= ~target_mask;
+ scb->flags &= ~SCB_MSGOUT_BITS;
+ aic7xxx_set_width(p, target, channel, lun, MSG_EXT_WDTR_BUS_8_BIT,
+ (AHC_TRANS_ACTIVE|AHC_TRANS_GOAL|AHC_TRANS_CUR));
+ aic7xxx_set_syncrate(p, NULL, target, channel, 0, 0,
+ AHC_TRANS_ACTIVE|AHC_TRANS_CUR|AHC_TRANS_QUITE);
+ if ( (p->needsdtr_copy & target_mask) &&
+ !(p->sdtr_pending & target_mask) )
+ {
+ p->sdtr_pending |= target_mask;
+ scb->flags |= SCB_MSGOUT_SDTR;
+ aic_outb(p, HOST_MSG, MSG_OUT);
+ aic_outb(p, aic_inb(p, SCSISIGO) | ATNO, SCSISIGO);
+ }
+ }
+ else if (scb->flags & SCB_MSGOUT_SDTR)
+ {
+ /*
+ * note asynch xfers and clear flag
+ */
+ p->needsdtr &= ~target_mask;
+ p->needsdtr_copy &= ~target_mask;
+ p->sdtr_pending &= ~target_mask;
+ scb->flags &= ~SCB_MSGOUT_SDTR;
+ aic7xxx_set_syncrate(p, NULL, target, channel, 0, 0,
+ (AHC_TRANS_CUR|AHC_TRANS_ACTIVE|AHC_TRANS_GOAL));
+ }
+ else if (aic7xxx_verbose & VERBOSE_SEQINT)
+ {
+ /*
+ * Otherwise, we ignore it.
+ */
+ printk(INFO_LEAD "Received MESSAGE_REJECT for unknown cause. "
+ "Ignoring.\n", p->host_no, channel, target, lun);
+ }
+ }
+ break;
+
+ case BAD_STATUS:
+ {
+ unsigned char scb_index;
+ struct aic7xxx_hwscb *hscb;
+ Scsi_Cmnd *cmd;
+
+ /* The sequencer will notify us when a command has an error that
+ * would be of interest to the kernel. This allows us to leave
+ * the sequencer running in the common case of command completes
+ * without error. The sequencer will have DMA'd the SCB back
+ * up to us, so we can reference the drivers SCB array.
+ *
+ * Set the default return value to 0 indicating not to send
+ * sense. The sense code will change this if needed and this
+ * reduces code duplication.
+ */
+ aic_outb(p, 0, RETURN_1);
+ scb_index = aic_inb(p, SCB_TAG);
+ if (scb_index > p->scb_data->numscbs)
+ {
+ printk(WARN_LEAD "Invalid SCB during SEQINT 0x%02x, SCB_TAG %d.\n",
+ p->host_no, channel, target, lun, intstat, scb_index);
+ break;
+ }
+ scb = p->scb_data->scb_array[scb_index];
+ hscb = scb->hscb;
+
+ if (!(scb->flags & SCB_ACTIVE) || (scb->cmd == NULL))
+ {
+ printk(WARN_LEAD "Invalid SCB during SEQINT 0x%x, scb %d, flags 0x%x,"
+ " cmd 0x%lx.\n", p->host_no, channel, target, lun, intstat,
+ scb_index, scb->flags, (unsigned long) scb->cmd);
+ }
+ else
+ {
+ cmd = scb->cmd;
+ hscb->target_status = aic_inb(p, SCB_TARGET_STATUS);
+ aic7xxx_status(cmd) = hscb->target_status;
+
+ cmd->result = hscb->target_status;
+
+ switch (status_byte(hscb->target_status))
+ {
+ case GOOD:
+ if (aic7xxx_verbose & VERBOSE_SEQINT)
+ printk(INFO_LEAD "Interrupted for status of GOOD???\n",
+ p->host_no, CTL_OF_SCB(scb));
+ break;
+
+ case COMMAND_TERMINATED:
+ case CHECK_CONDITION:
+ if ( !(scb->flags & SCB_SENSE) )
+ {
+ /*
+ * XXX - How do we save the residual (if there is one).
+ */
+ if ( hscb->residual_SG_segment_count != 0 )
+ aic7xxx_calculate_residual(p, scb);
+
+ /*
+ * Send a sense command to the requesting target.
+ * XXX - revisit this and get rid of the memcopys.
+ */
+ memcpy(&scb->sense_cmd[0], &generic_sense[0],
+ sizeof(generic_sense));
+
+ scb->sense_cmd[1] = (cmd->lun << 5);
+ scb->sense_cmd[4] = sizeof(cmd->sense_buffer);
+
+ scb->sg_list[0].address =
+ cpu_to_le32(VIRT_TO_BUS(&cmd->sense_buffer[0]));
+ scb->sg_list[0].length =
+ cpu_to_le32(sizeof(cmd->sense_buffer));
+
+ /*
+ * XXX - We should allow disconnection, but can't as it
+ * might allow overlapped tagged commands.
+ */
+ /* hscb->control &= DISCENB; */
+ hscb->control = 0;
+ hscb->target_status = 0;
+ hscb->SG_list_pointer =
+ cpu_to_le32(VIRT_TO_BUS(&scb->sg_list[0]));
+ hscb->data_pointer = scb->sg_list[0].address;
+ hscb->data_count = scb->sg_list[0].length;
+ hscb->SCSI_cmd_pointer =
+ cpu_to_le32(VIRT_TO_BUS(&scb->sense_cmd[0]));
+ hscb->SCSI_cmd_length = COMMAND_SIZE(scb->sense_cmd[0]);
+ hscb->residual_SG_segment_count = 0;
+ hscb->residual_data_count[0] = 0;
+ hscb->residual_data_count[1] = 0;
+ hscb->residual_data_count[2] = 0;
+
+ scb->sg_count = hscb->SG_segment_count = 1;
+ scb->sg_length = sizeof(cmd->sense_buffer);
+ scb->tag_action = 0;
+ /*
+ * This problem could be caused if the target has lost power
+ * or found some other way to loose the negotiation settings,
+ * so if needed, we'll re-negotiate while doing the sense cmd.
+ * However, if this SCB already was attempting to negotiate,
+ * then we assume this isn't the problem and skip this part.
+ */
+#ifdef AIC7XXX_FAKE_NEGOTIATION_CMDS
+ if ( (scb->cmd->cmnd[0] != TEST_UNIT_READY) &&
+ (p->dev_flags[tindex] & DEVICE_SCANNED) &&
+ !(p->wdtr_pending & target_mask) &&
+ !(p->sdtr_pending & target_mask) )
+ {
+ p->needwdtr |= (p->needwdtr_copy & target_mask);
+ p->needsdtr |= (p->needsdtr_copy & target_mask);
+ }
+ else if ( (scb->cmd == p->dev_wdtr_cmnd[tindex]) ||
+ (scb->cmd == p->dev_sdtr_cmnd[tindex]) )
+ {
+ /*
+ * This is already a negotiation command, so we must have
+ * already done either WDTR or SDTR (or maybe both). So
+ * we simply check sdtr_pending and needsdtr to see if we
+ * should throw out SDTR on this command.
+ *
+ * Note: Don't check the needsdtr_copy here, instead just
+ * check to see if WDTR wiped out our SDTR and set needsdtr.
+ * Even if WDTR did wipe out SDTR and set needsdtr, if
+ * parse_msg() then turned around and started our SDTR
+ * in back to back fasion, then conclusion of that should
+ * have negated any needsdtr setting. That's why we only
+ * check needsdtr and sdtr_pending.
+ */
+ scb->flags &= ~SCB_MSGOUT_BITS;
+ if ( (scb->cmd == p->dev_wdtr_cmnd[tindex]) &&
+ !(p->sdtr_pending & target_mask) &&
+ (p->needsdtr & target_mask) )
+ {
+ p->sdtr_pending |= target_mask;
+ hscb->control |= MK_MESSAGE;
+ scb->flags |= SCB_MSGOUT_SDTR;
+ }
+
+ /*
+ * This is the important part though. We are getting sense
+ * info back from this device. It's going into a fake
+ * command. We need to put that into the real command
+ * instead so that the mid level SCSI code can act upon it.
+ * So, when we set up these fake commands, the next pointer
+ * is used to point to the real command. Use that to change
+ * the address of our sense_buffer[] to the real command.
+ * However, don't do this if the real command is also a
+ * TEST_UNIT_READY as it will most likely pull down its own
+ * SENSE information anyway.
+ */
+ if (cmd->next->cmnd[0] != TEST_UNIT_READY)
+ {
+ scb->sg_list[0].address =
+ cpu_to_le32(VIRT_TO_BUS(&cmd->next->sense_buffer[0]));
+ hscb->data_pointer = scb->sg_list[0].address;
+ }
+ }
+#else
+ if ( (scb->cmd->cmnd[0] != TEST_UNIT_READY) &&
+ !(scb->flags & SCB_MSGOUT_BITS) &&
+ (scb->cmd->lun == 0) &&
+ (p->dev_flags[TARGET_INDEX(scb->cmd)] & DEVICE_SCANNED) )
+ {
+ if ( (p->needwdtr_copy & target_mask) &&
+ !(p->wdtr_pending & target_mask) &&
+ !(p->sdtr_pending & target_mask) )
+ {
+ p->needwdtr |= target_mask;
+ p->wdtr_pending |= target_mask;
+ hscb->control |= MK_MESSAGE;
+ scb->flags |= SCB_MSGOUT_WDTR;
+ }
+ if ( p->needsdtr_copy & target_mask )
+ {
+ p->needsdtr |= target_mask;
+ if ( !(p->wdtr_pending & target_mask) &&
+ !(p->sdtr_pending & target_mask) )
+ {
+ p->sdtr_pending |= target_mask;
+ hscb->control |= MK_MESSAGE;
+ scb->flags |= SCB_MSGOUT_SDTR;
+ }
+ }
+ }
+ else
+ scb->flags &= ~SCB_MSGOUT_BITS;
+#endif /* AIC7XXX_FAKE_NEGOTIATION_CMDS */
+ scb->flags |= SCB_SENSE;
+ /*
+ * Ensure the target is busy since this will be an
+ * an untagged request.
+ */
+#ifdef AIC7XXX_VERBOSE_DEBUGGING
+ if (aic7xxx_verbose > 0xffff)
+ {
+ if (scb->flags & SCB_MSGOUT_BITS)
+ printk(INFO_LEAD "Requesting SENSE with %s\n", p->host_no,
+ CTL_OF_SCB(scb), (scb->flags & SCB_MSGOUT_SDTR) ?
+ "SDTR" : "WDTR");
+ else
+ printk(INFO_LEAD "Requesting SENSE, no MSG\n", p->host_no,
+ CTL_OF_SCB(scb));
+ }
+#endif
+ aic7xxx_busy_target(p, scb);
+ aic_outb(p, SEND_SENSE, RETURN_1);
+ aic7xxx_error(cmd) = DID_OK;
+ break;
+ } /* first time sense, no errors */
+ aic7xxx_error(cmd) = DID_OK;
+ scb->flags &= ~SCB_SENSE;
+ break;
+
+ case QUEUE_FULL:
+ queue_flag = TRUE; /* Mark that this is a QUEUE_FULL and */
+ case BUSY: /* drop through to here */
+ {
+ struct aic7xxx_scb *next_scbp, *prev_scbp;
+ unsigned char active_hscb, next_hscb, prev_hscb, scb_index;
+ /*
+ * We have to look three places for queued commands:
+ * 1: QINFIFO
+ * 2: p->waiting_scbs queue
+ * 3: WAITING_SCBS list on card (for commands that are started
+ * but haven't yet made it to the device)
+ */
+ aic7xxx_search_qinfifo(p, target, channel, lun,
+ SCB_LIST_NULL, 0, TRUE,
+ &p->delayed_scbs[tindex]);
+ next_scbp = p->waiting_scbs.head;
+ while ( next_scbp != NULL )
+ {
+ prev_scbp = next_scbp;
+ next_scbp = next_scbp->q_next;
+ if ( aic7xxx_match_scb(p, prev_scbp, target, channel, lun,
+ SCB_LIST_NULL) )
+ {
+ scbq_remove(&p->waiting_scbs, prev_scbp);
+ scbq_insert_tail(&p->delayed_scbs[tindex],
+ prev_scbp);
+ }
+ }
+ next_scbp = NULL;
+ active_hscb = aic_inb(p, SCBPTR);
+ prev_hscb = next_hscb = scb_index = SCB_LIST_NULL;
+ next_hscb = aic_inb(p, WAITING_SCBH);
+ while (next_hscb != SCB_LIST_NULL)
+ {
+ aic_outb(p, next_hscb, SCBPTR);
+ scb_index = aic_inb(p, SCB_TAG);
+ if (scb_index < p->scb_data->numscbs)
+ {
+ next_scbp = p->scb_data->scb_array[scb_index];
+ if (aic7xxx_match_scb(p, next_scbp, target, channel, lun,
+ SCB_LIST_NULL) )
+ {
+ if (next_scbp->flags & SCB_WAITINGQ)
+ {
+ p->dev_active_cmds[tindex]++;
+ p->activescbs--;
+ scbq_remove(&p->delayed_scbs[tindex], next_scbp);
+ scbq_remove(&p->waiting_scbs, next_scbp);
+ }
+ scbq_insert_head(&p->delayed_scbs[tindex],
+ next_scbp);
+ next_scbp->flags |= SCB_WAITINGQ;
+ p->dev_active_cmds[tindex]--;
+ p->activescbs--;
+ next_hscb = aic_inb(p, SCB_NEXT);
+ aic_outb(p, 0, SCB_CONTROL);
+ aic_outb(p, SCB_LIST_NULL, SCB_TAG);
+ aic7xxx_add_curscb_to_free_list(p);
+ if (prev_hscb == SCB_LIST_NULL)
+ {
+ /* We were first on the list,
+ * so we kill the selection
+ * hardware. Let the sequencer
+ * re-init the hardware itself
+ */
+ aic_outb(p, aic_inb(p, SCSISEQ) & ~ENSELO, SCSISEQ);
+ aic_outb(p, CLRSELTIMEO, CLRSINT1);
+ aic_outb(p, next_hscb, WAITING_SCBH);
+ }
+ else
+ {
+ aic_outb(p, prev_hscb, SCBPTR);
+ aic_outb(p, next_hscb, SCB_NEXT);
+ }
+ }
+ else
+ {
+ prev_hscb = next_hscb;
+ next_hscb = aic_inb(p, SCB_NEXT);
+ }
+ } /* scb_index >= p->scb_data->numscbs */
+ }
+ aic_outb(p, active_hscb, SCBPTR);
+ if (scb->flags & SCB_WAITINGQ)
+ {
+ scbq_remove(&p->delayed_scbs[tindex], scb);
+ scbq_remove(&p->waiting_scbs, scb);
+ p->dev_active_cmds[tindex]++;
+ p->activescbs++;
+ }
+ scbq_insert_head(&p->delayed_scbs[tindex], scb);
+ p->dev_active_cmds[tindex]--;
+ p->activescbs--;
+ scb->flags |= SCB_WAITINGQ | SCB_WAS_BUSY;
+
+ if (p->dev_timer[tindex].expires == 0)
+ {
+ if ( p->dev_active_cmds[tindex] )
+ {
+ p->dev_timer[tindex].expires = jiffies + (HZ * 2);
+ add_timer(&p->dev_timer[tindex]);
+ }
+ else
+ {
+ p->dev_timer[tindex].expires = jiffies + (HZ / 2);
+ add_timer(&p->dev_timer[tindex]);
+ }
+ }
+#ifdef AIC7XXX_VERBOSE_DEBUGGING
+ if (aic7xxx_verbose & VERBOSE_MINOR_ERROR)
+ {
+ if (queue_flag)
+ printk(INFO_LEAD "Queue full received; queue depth %d, "
+ "active %d\n", p->host_no, CTL_OF_SCB(scb),
+ p->dev_max_queue_depth[tindex],
+ p->dev_active_cmds[tindex]);
+ else
+ printk(INFO_LEAD "Target busy\n", p->host_no, CTL_OF_SCB(scb));
+
+ }
+#endif
+ if (queue_flag)
+ {
+ p->dev_temp_queue_depth[tindex] =
+ p->dev_active_cmds[tindex];
+ if ( p->dev_last_queue_full[tindex] !=
+ p->dev_active_cmds[tindex] )
+ {
+ p->dev_last_queue_full[tindex] =
+ p->dev_active_cmds[tindex];
+ p->dev_last_queue_full_count[tindex] = 0;
+ }
+ else
+ {
+ p->dev_last_queue_full_count[tindex]++;
+ }
+ if ( (p->dev_last_queue_full_count[tindex] > 14) &&
+ (p->dev_active_cmds[tindex] > 4) )
+ {
+ if (aic7xxx_verbose & VERBOSE_NEGOTIATION2)
+ printk(INFO_LEAD "Queue depth reduced to %d\n", p->host_no,
+ CTL_OF_SCB(scb), p->dev_active_cmds[tindex]);
+ p->dev_max_queue_depth[tindex] =
+ p->dev_active_cmds[tindex];
+ p->dev_last_queue_full[tindex] = 0;
+ p->dev_last_queue_full_count[tindex] = 0;
+ }
+ }
+ break;
+ }
+
+ default:
+ if (aic7xxx_verbose & VERBOSE_SEQINT)
+ printk(INFO_LEAD "Unexpected target status 0x%x.\n", p->host_no,
+ CTL_OF_SCB(scb), scb->hscb->target_status);
+ if (!aic7xxx_error(cmd))
+ {
+ aic7xxx_error(cmd) = DID_RETRY_COMMAND;
+ }
+ break;
+ } /* end switch */
+ } /* end else of */
+ }
+ break;
+
+ case AWAITING_MSG:
+ {
+ unsigned char scb_index, msg_out;
+
+ scb_index = aic_inb(p, SCB_TAG);
+ msg_out = aic_inb(p, MSG_OUT);
+ scb = p->scb_data->scb_array[scb_index];
+ p->msg_index = p->msg_len = 0;
+ /*
+ * This SCB had a MK_MESSAGE set in its control byte informing
+ * the sequencer that we wanted to send a special message to
+ * this target.
+ */
+
+ if ( !(scb->flags & SCB_DEVICE_RESET) &&
+ (aic_inb(p, MSG_OUT) == MSG_IDENTIFYFLAG) &&
+ (scb->hscb->control & TAG_ENB) )
+ {
+ p->msg_buf[p->msg_index++] = scb->tag_action;
+ p->msg_buf[p->msg_index++] = scb->hscb->tag;
+ p->msg_len += 2;
+ }
+
+ if (scb->flags & SCB_DEVICE_RESET)
+ {
+ p->msg_buf[p->msg_index++] = MSG_BUS_DEV_RESET;
+ p->msg_len++;
+ if (aic7xxx_verbose & VERBOSE_RESET_PROCESS)
+ printk(INFO_LEAD "Bus device reset mailed.\n",
+ p->host_no, CTL_OF_SCB(scb));
+ }
+ else if (scb->flags & SCB_ABORT)
+ {
+ if (scb->tag_action)
+ {
+ p->msg_buf[p->msg_index++] = MSG_ABORT_TAG;
+ }
+ else
+ {
+ p->msg_buf[p->msg_index++] = MSG_ABORT;
+ }
+ p->msg_len++;
+ if (aic7xxx_verbose & VERBOSE_ABORT_PROCESS)
+ printk(INFO_LEAD "Abort message mailed.\n", p->host_no,
+ CTL_OF_SCB(scb));
+ }
+ else if (scb->flags & SCB_MSGOUT_WDTR)
+ {
+#ifdef AIC7XXX_VERBOSE_DEBUGGING
+ if (aic7xxx_verbose > 0xffff)
+ printk(INFO_LEAD "Sending WDTR message.\n", p->host_no,
+ CTL_OF_SCB(scb));
+#endif
+ aic7xxx_construct_wdtr(p,
+ p->transinfo[TARGET_INDEX(scb->cmd)].goal_width);
+ }
+ else if (scb->flags & SCB_MSGOUT_SDTR)
+ {
+ unsigned int max_sync, period;
+ /*
+ * We need to set an accurate goal_offset instead of
+ * the ridiculously high one we default to. We should
+ * now know if we are wide. Plus, the WDTR code will
+ * set our goal_offset for us as well.
+ */
+ if (p->transinfo[tindex].goal_offset)
+ {
+ if (p->features & AHC_ULTRA2)
+ p->transinfo[tindex].goal_offset = MAX_OFFSET_ULTRA2;
+ else if (p->transinfo[tindex].cur_width == MSG_EXT_WDTR_BUS_16_BIT)
+ p->transinfo[tindex].goal_offset = MAX_OFFSET_16BIT;
+ else
+ p->transinfo[tindex].goal_offset = MAX_OFFSET_8BIT;
+ }
+ /*
+ * Now that the device is selected, use the bits in SBLKCTL and
+ * SSTAT2 to determine the max sync rate for this device.
+ */
+ if (p->features & AHC_ULTRA2)
+ {
+ if ( (aic_inb(p, SBLKCTL) & ENAB40) &&
+ !(aic_inb(p, SSTAT2) & EXP_ACTIVE) )
+ {
+ max_sync = AHC_SYNCRATE_ULTRA2;
+ }
+ else
+ {
+ max_sync = AHC_SYNCRATE_ULTRA;
+ }
+ }
+ else if (p->features & AHC_ULTRA)
+ {
+ max_sync = AHC_SYNCRATE_ULTRA;
+ }
+ else
+ {
+ max_sync = AHC_SYNCRATE_FAST;
+ }
+ period = p->transinfo[tindex].goal_period;
+ aic7xxx_find_syncrate(p, &period, max_sync);
+#ifdef AIC7XXX_VERBOSE_DEBUGGING
+ if (aic7xxx_verbose > 0xffff)
+ printk(INFO_LEAD "Sending SDTR %d/%d message.\n", p->host_no,
+ CTL_OF_SCB(scb),
+ p->transinfo[tindex].goal_period,
+ p->transinfo[tindex].goal_offset);
+#endif
+ aic7xxx_construct_sdtr(p, period,
+ p->transinfo[tindex].goal_offset);
+ }
+ else
+ {
+ sti();
+ panic("aic7xxx: AWAITING_MSG for an SCB that does "
+ "not have a waiting message.\n");
+ }
+ /*
+ * We've set everything up to send our message, now to actually do
+ * so we need to enable reqinit interrupts and let the interrupt
+ * handler do the rest. We don't want to unpause the sequencer yet
+ * though so we'll return early. We also have to make sure that
+ * we clear the SEQINT *BEFORE* we set the REQINIT handler active
+ * or else it's possible on VLB cards to loose the first REQINIT
+ * interrupt. Edge triggered EISA cards could also loose this
+ * interrupt, although PCI and level triggered cards should not
+ * have this problem since they continually interrupt the kernel
+ * until we take care of the situation.
+ */
+ scb->flags |= SCB_MSGOUT_SENT;
+ p->msg_index = 0;
+ p->msg_type = MSG_TYPE_INITIATOR_MSGOUT;
+ p->flags |= AHC_HANDLING_REQINITS;
+ aic_outb(p, aic_inb(p, SIMODE1) | ENREQINIT, SIMODE1);
+ return;
+ }
+ break;
+
+ case DATA_OVERRUN:
+ {
+ unsigned char scb_index = aic_inb(p, SCB_TAG);
+ unsigned char lastphase = aic_inb(p, LASTPHASE);
+ unsigned int i;
+
+ scb = (p->scb_data->scb_array[scb_index]);
+ /*
+ * XXX - What do we really want to do on an overrun? The
+ * mid-level SCSI code should handle this, but for now,
+ * we'll just indicate that the command should retried.
+ * If we retrieved sense info on this target, then the
+ * base SENSE info should have been saved prior to the
+ * overrun error. In that case, we return DID_OK and let
+ * the mid level code pick up on the sense info. Otherwise
+ * we return DID_ERROR so the command will get retried.
+ */
+ if ( !(scb->flags & SCB_SENSE) )
+ {
+ printk(WARN_LEAD "Data overrun detected in %s phase, tag %d;\n",
+ p->host_no, CTL_OF_SCB(scb),
+ (lastphase == P_DATAIN) ? "Data-In" : "Data-Out", scb->hscb->tag);
+ printk(KERN_WARNING " %s seen Data Phase. Length=%d, NumSGs=%d.\n",
+ (aic_inb(p, SEQ_FLAGS) & DPHASE) ? "Have" : "Haven't",
+ scb->sg_length, scb->sg_count);
+ for (i = 0; i < scb->sg_count; i++)
+ {
+ printk(KERN_WARNING " sg[%d] - Addr 0x%x : Length %d\n",
+ i,
+ le32_to_cpu(scb->sg_list[i].address),
+ le32_to_cpu(scb->sg_list[i].length) );
+ }
+ aic7xxx_error(scb->cmd) = DID_ERROR;
+ }
+ else
+ printk(INFO_LEAD "Data Overrun during SEND_SENSE operation.\n",
+ p->host_no, CTL_OF_SCB(scb));
+ }
+ break;
+
+#if AIC7XXX_NOT_YET
+ case TRACEPOINT:
+ {
+ printk(INFO_LEAD "Tracepoint #1 reached.\n", p->host_no, channel,
+ target, lun);
+ }
+ break;
+
+ case TRACEPOINT2:
+ {
+ printk(INFO_LEAD "Tracepoint #2 reached.\n", p->host_no, channel,
+ target, lun);
+ }
+ break;
+
+ /* XXX Fill these in later */
+ case MSG_BUFFER_BUSY:
+ printk("aic7xxx: Message buffer busy.\n");
+ break;
+ case MSGIN_PHASEMIS:
+ printk("aic7xxx: Message-in phasemis.\n");
+ break;
+#endif
+
+ default: /* unknown */
+ printk(WARN_LEAD "Unknown SEQINT, INTSTAT 0x%x, SCSISIGI 0x%x.\n",
+ p->host_no, channel, target, lun, intstat,
+ aic_inb(p, SCSISIGI));
+ break;
+ }
+
+ /*
+ * Clear the sequencer interrupt and unpause the sequencer.
+ */
+ unpause_sequencer(p, /* unpause always */ TRUE);
+}
+
+/*+F*************************************************************************
+ * Function:
+ * aic7xxx_parse_msg
+ *
+ * Description:
+ * Parses incoming messages into actions on behalf of
+ * aic7xxx_handle_reqinit
+ *_F*************************************************************************/
+static int
+aic7xxx_parse_msg(struct aic7xxx_host *p, struct aic7xxx_scb *scb)
+{
+ int reject, reply, done;
+ unsigned char target_scsirate, tindex;
+ unsigned short target_mask;
+ unsigned char target, channel, lun;
+
+ target = scb->cmd->target;
+ channel = scb->cmd->channel;
+ lun = scb->cmd->lun;
+ reply = reject = done = FALSE;
+ tindex = TARGET_INDEX(scb->cmd);
+ target_scsirate = aic_inb(p, TARG_SCSIRATE + tindex);
+ target_mask = (0x01 << tindex);
+
+ /*
+ * Parse as much of the message as is availible,
+ * rejecting it if we don't support it. When
+ * the entire message is availible and has been
+ * handled, return TRUE indicating that we have
+ * parsed an entire message.
+ */
+
+ if (p->msg_buf[0] != MSG_EXTENDED)
+ {
+ reject = TRUE;
+ }
+
+ /*
+ * Just accept the length byte outright and perform
+ * more checking once we know the message type.
+ */
+
+ if ( !reject && (p->msg_len > 2) )
+ {
+ switch(p->msg_buf[2])
+ {
+ case MSG_EXT_SDTR:
+ {
+ unsigned int period, offset;
+ unsigned char maxsync, saved_offset;
+ struct aic7xxx_syncrate *syncrate;
+
+ if (p->msg_buf[1] != MSG_EXT_SDTR_LEN)
+ {
+ reject = TRUE;
+ break;
+ }
+
+ if (p->msg_len < (MSG_EXT_SDTR_LEN + 2))
+ {
+ break;
+ }
+
+ period = p->msg_buf[3];
+ saved_offset = offset = p->msg_buf[4];
+
+ if (p->features & AHC_ULTRA2)
+ {
+ if ( (aic_inb(p, SBLKCTL) & ENAB40) &&
+ !(aic_inb(p, SSTAT2) & EXP_ACTIVE) )
+ {
+ maxsync = AHC_SYNCRATE_ULTRA2;
+ }
+ else
+ {
+ maxsync = AHC_SYNCRATE_ULTRA;
+ }
+ }
+ else if (p->features & AHC_ULTRA)
+ {
+ maxsync = AHC_SYNCRATE_ULTRA;
+ }
+ else
+ {
+ maxsync = AHC_SYNCRATE_FAST;
+ }
+
+#ifdef AIC7XXX_VERBOSE_DEBUGGING
+ if (aic7xxx_verbose > 0xffff)
+ {
+ printk(INFO_LEAD "Finished receipt of SDTR, parsing %d/%d\n",
+ p->host_no, CTL_OF_SCB(scb), period, offset);
+ syncrate = aic7xxx_find_syncrate(p, &period, maxsync);
+ printk(INFO_LEAD "After find_syncrate() %d/%d\n",
+ p->host_no, CTL_OF_SCB(scb), period, offset);
+ aic7xxx_validate_offset(p, syncrate, &offset,
+ target_scsirate & WIDEXFER);
+ printk(INFO_LEAD "After validate_offset() %d/%d\n",
+ p->host_no, CTL_OF_SCB(scb), period, offset);
+ aic7xxx_set_syncrate(p, syncrate, target, channel, period,
+ offset, AHC_TRANS_ACTIVE|AHC_TRANS_CUR);
+ printk(INFO_LEAD "Final values of Period/Offset as set: %d/%d\n",
+ p->host_no, CTL_OF_SCB(scb), period, offset);
+ }
+ else
+ {
+ syncrate = aic7xxx_find_syncrate(p, &period, maxsync);
+ aic7xxx_validate_offset(p, syncrate, &offset,
+ target_scsirate & WIDEXFER);
+ aic7xxx_set_syncrate(p, syncrate, target, channel, period,
+ offset, AHC_TRANS_ACTIVE|AHC_TRANS_CUR);
+ }
+#else
+ syncrate = aic7xxx_find_syncrate(p, &period, maxsync);
+ aic7xxx_validate_offset(p, syncrate, &offset,
+ target_scsirate & WIDEXFER);
+ aic7xxx_set_syncrate(p, syncrate, target, channel, period,
+ offset, AHC_TRANS_ACTIVE|AHC_TRANS_CUR);
+#endif
+
+ if (offset == 0)
+ {
+ /*
+ * Uhh ohh, things fell through to async....update the goal
+ * items and the needsdtr_copy to reflect this...
+ */
+ aic7xxx_set_syncrate(p, syncrate, target, channel, period,
+ offset, AHC_TRANS_GOAL|AHC_TRANS_QUITE);
+ p->needsdtr_copy &= ~target_mask;
+ }
+ /*
+ * Did we start this, if not, or if we went to low and had to
+ * go async, then send an SDTR back to the target
+ */
+ p->needsdtr &= ~target_mask;
+ p->sdtr_pending &= ~target_mask;
+ if ( ((scb->flags & (SCB_MSGOUT_SENT|SCB_MSGOUT_SDTR)) ==
+ (SCB_MSGOUT_SENT|SCB_MSGOUT_SDTR)) &&
+ (offset == saved_offset) )
+ {
+ scb->flags &= ~SCB_MSGOUT_BITS;
+ }
+ else
+ {
+ /*
+ * Send a reply SDTR back. Even if we sent the first one, it
+ * is valid to send another one out immediately to re-negotiate
+ * things, and a few devices don't like getting rejects after
+ * we already sent them one SDTR. Just send an SDTR for async
+ * this time if need be (or for the correct params if we didn't
+ * start all of this). If this is a Reject Reply type message,
+ * then we've put the async settings into the goal area for
+ * future reference (when we get the AWAITING_MSG interrupt).
+ * If this is a case where we are responding to the target's
+ * initiated SDTR, then leave our own goal and user values in
+ * place (unless the device hasn't been scanned yet, in which
+ * case, put the user values into the goal values so we don't
+ * send out an Async message).
+ */
+ if ( !(p->dev_flags[tindex] & DEVICE_SCANNED) )
+ {
+ p->transinfo[tindex].goal_width =
+ p->transinfo[tindex].user_width;
+ p->transinfo[tindex].goal_period =
+ p->transinfo[tindex].user_period;
+ p->transinfo[tindex].goal_offset =
+ p->transinfo[tindex].user_offset;
+ p->needwdtr_copy |= target_mask;
+ p->needsdtr_copy |= target_mask;
+ }
+ scb->flags &= ~SCB_MSGOUT_BITS;
+ scb->flags |= SCB_MSGOUT_SDTR;
+ aic_outb(p, HOST_MSG, MSG_OUT);
+ aic_outb(p, aic_inb(p, SCSISIGO) | ATNO, SCSISIGO);
+ }
+ done = TRUE;
+ break;
+ }
+ case MSG_EXT_WDTR:
+ {
+ unsigned char bus_width;
+
+ if (p->msg_buf[1] != MSG_EXT_WDTR_LEN)
+ {
+ reject = TRUE;
+ break;
+ }
+
+ if (p->msg_len < (MSG_EXT_WDTR_LEN + 2))
+ {
+ break;
+ }
+
+ bus_width = p->msg_buf[3];
+ if ( (scb->flags & (SCB_MSGOUT_SENT|SCB_MSGOUT_WDTR)) ==
+ (SCB_MSGOUT_SENT|SCB_MSGOUT_WDTR) )
+ {
+ switch(bus_width)
+ {
+ default:
+ {
+ reject = TRUE;
+ if ( (aic7xxx_verbose & VERBOSE_NEGOTIATION2) &&
+ ((p->dev_flags[tindex] & DEVICE_PRINT_WDTR) ||
+ (aic7xxx_verbose > 0xffff)) )
+ {
+ printk(INFO_LEAD "Requesting %d bit transfers, rejecting.\n",
+ p->host_no, CTL_OF_SCB(scb), 8 * (0x01 << bus_width));
+ p->dev_flags[tindex] &= ~DEVICE_PRINT_WDTR;
+ }
+ } /* We fall through on purpose */
+ case MSG_EXT_WDTR_BUS_8_BIT:
+ {
+ bus_width = MSG_EXT_WDTR_BUS_8_BIT;
+ p->needwdtr_copy &= ~target_mask;
+ break;
+ }
+ case MSG_EXT_WDTR_BUS_16_BIT:
+ {
+ break;
+ }
+ }
+ scb->flags &= ~SCB_MSGOUT_BITS;
+ p->wdtr_pending &= ~target_mask;
+ p->needwdtr &= ~target_mask;
+ }
+ else
+ {
+ scb->flags &= ~SCB_MSGOUT_BITS;
+ scb->flags |= SCB_MSGOUT_WDTR;
+ reply = TRUE;
+ if ( !(p->dev_flags[tindex] & DEVICE_SCANNED) )
+ {
+ /*
+ * Well, we now know the WDTR and SYNC caps of this device since
+ * it contacted us first, mark it as such and copy the user stuff
+ * over to the goal stuff.
+ */
+ p->transinfo[tindex].goal_width =
+ p->transinfo[tindex].user_width;
+ p->transinfo[tindex].goal_period =
+ p->transinfo[tindex].user_period;
+ p->transinfo[tindex].goal_offset =
+ p->transinfo[tindex].user_offset;
+ p->needwdtr_copy |= target_mask;
+ p->needsdtr_copy |= target_mask;
+ }
+ switch(bus_width)
+ {
+ default:
+ {
+ if ( (p->features & AHC_WIDE) &&
+ (p->transinfo[tindex].goal_width ==
+ MSG_EXT_WDTR_BUS_16_BIT) )
+ {
+ bus_width = MSG_EXT_WDTR_BUS_16_BIT;
+ break;
+ }
+ } /* Fall through if we aren't a wide card */
+ case MSG_EXT_WDTR_BUS_8_BIT:
+ {
+ p->needwdtr_copy &= ~target_mask;
+ bus_width = MSG_EXT_WDTR_BUS_8_BIT;
+ break;
+ }
+ }
+ p->needwdtr &= ~target_mask;
+ p->wdtr_pending &= ~target_mask;
+ aic_outb(p, HOST_MSG, MSG_OUT);
+ aic_outb(p, aic_inb(p, SCSISIGO) | ATNO, SCSISIGO);
+ }
+ aic7xxx_set_width(p, target, channel, lun, bus_width,
+ AHC_TRANS_ACTIVE|AHC_TRANS_CUR);
+
+ /*
+ * By virtue of the SCSI spec, a WDTR message negates any existing
+ * SDTR negotiations. So, even if needsdtr isn't marked for this
+ * device, we still have to do a new SDTR message if the device
+ * supports SDTR at all. Therefore, we check needsdtr_copy instead
+ * of needstr.
+ */
+ aic7xxx_set_syncrate(p, NULL, target, channel, 0, 0,
+ AHC_TRANS_ACTIVE|AHC_TRANS_CUR|AHC_TRANS_QUITE);
+ if ( (p->needsdtr_copy & target_mask) &&
+ !(p->sdtr_pending & target_mask))
+ {
+ p->needsdtr |= target_mask;
+ if ( !reject && !reply )
+ {
+ scb->flags &= ~SCB_MSGOUT_WDTR;
+ if (p->transinfo[tindex].goal_period)
+ {
+ p->sdtr_pending |= target_mask;
+ scb->flags |= SCB_MSGOUT_SDTR;
+ aic_outb(p, HOST_MSG, MSG_OUT);
+ aic_outb(p, aic_inb(p, SCSISIGO) | ATNO, SCSISIGO);
+ }
+ }
+ }
+ done = TRUE;
+ break;
+ }
+ default:
+ {
+ reject = TRUE;
+ break;
+ }
+ } /* end of switch(p->msg_type) */
+ } /* end of if (!reject && (p->msg_len > 2)) */
+
+ if (reject)
+ {
+ aic_outb(p, MSG_MESSAGE_REJECT, MSG_OUT);
+ aic_outb(p, aic_inb(p, SCSISIGO) | ATNO, SCSISIGO);
+ done = TRUE;
+ }
+ return(done);
+}
+
+
+/*+F*************************************************************************
+ * Function:
+ * aic7xxx_handle_reqinit
+ *
+ * Description:
+ * Interrupt handler for REQINIT interrupts (used to transfer messages to
+ * and from devices).
+ *_F*************************************************************************/
+static void
+aic7xxx_handle_reqinit(struct aic7xxx_host *p, struct aic7xxx_scb *scb)
+{
+ unsigned char lastbyte;
+ unsigned char phasemis;
+ int done = FALSE;
+
+ switch(p->msg_type)
+ {
+ case MSG_TYPE_INITIATOR_MSGOUT:
+ {
+ if (p->msg_len == 0)
+ panic("aic7xxx: REQINIT with no active message!\n");
+
+ lastbyte = (p->msg_index == (p->msg_len - 1));
+ phasemis = ( aic_inb(p, SCSISIGI) & PHASE_MASK) != P_MESGOUT;
+
+ if (lastbyte || phasemis)
+ {
+ /* Time to end the message */
+ p->msg_len = 0;
+ p->msg_type = MSG_TYPE_NONE;
+ /*
+ * NOTE-TO-MYSELF: If you clear the REQINIT after you
+ * disable REQINITs, then cases of REJECT_MSG stop working
+ * and hang the bus
+ */
+ aic_outb(p, aic_inb(p, SIMODE1) & ~ENREQINIT, SIMODE1);
+ aic_outb(p, CLRSCSIINT, CLRINT);
+ p->flags &= ~AHC_HANDLING_REQINITS;
+
+ if (phasemis == 0)
+ {
+ aic_outb(p, p->msg_buf[p->msg_index], SINDEX);
+ aic_outb(p, 0, RETURN_1);
+#ifdef AIC7XXX_VERBOSE_DEBUGGING
+ if (aic7xxx_verbose > 0xffff)
+ printk(INFO_LEAD "Completed sending of REQINIT message.\n",
+ p->host_no, CTL_OF_SCB(scb));
+#endif
+ }
+ else
+ {
+ aic_outb(p, MSGOUT_PHASEMIS, RETURN_1);
+#ifdef AIC7XXX_VERBOSE_DEBUGGING
+ if (aic7xxx_verbose > 0xffff)
+ printk(INFO_LEAD "PHASEMIS while sending REQINIT message.\n",
+ p->host_no, CTL_OF_SCB(scb));
+#endif
+ }
+ unpause_sequencer(p, TRUE);
+ }
+ else
+ {
+ /*
+ * Present the byte on the bus (clearing REQINIT) but don't
+ * unpause the sequencer.
+ */
+ aic_outb(p, CLRREQINIT, CLRSINT1);
+ aic_outb(p, CLRSCSIINT, CLRINT);
+ aic_outb(p, p->msg_buf[p->msg_index++], SCSIDATL);
+ }
+ break;
+ }
+ case MSG_TYPE_INITIATOR_MSGIN:
+ {
+ phasemis = ( aic_inb(p, SCSISIGI) & PHASE_MASK ) != P_MESGIN;
+
+ if (phasemis == 0)
+ {
+ p->msg_len++;
+ /* Pull the byte in without acking it */
+ p->msg_buf[p->msg_index] = aic_inb(p, SCSIBUSL);
+ done = aic7xxx_parse_msg(p, scb);
+ /* Ack the byte */
+ aic_outb(p, CLRREQINIT, CLRSINT1);
+ aic_outb(p, CLRSCSIINT, CLRINT);
+ aic_inb(p, SCSIDATL);
+ p->msg_index++;
+ }
+ if (phasemis || done)
+ {
+#ifdef AIC7XXX_VERBOSE_DEBUGGING
+ if (aic7xxx_verbose > 0xffff)
+ {
+ if (phasemis)
+ printk(INFO_LEAD "PHASEMIS while receiving REQINIT message.\n",
+ p->host_no, CTL_OF_SCB(scb));
+ else
+ printk(INFO_LEAD "Completed receipt of REQINIT message.\n",
+ p->host_no, CTL_OF_SCB(scb));
+ }
+#endif
+ /* Time to end our message session */
+ p->msg_len = 0;
+ p->msg_type = MSG_TYPE_NONE;
+ aic_outb(p, aic_inb(p, SIMODE1) & ~ENREQINIT, SIMODE1);
+ aic_outb(p, CLRSCSIINT, CLRINT);
+ p->flags &= ~AHC_HANDLING_REQINITS;
+ unpause_sequencer(p, TRUE);
+ }
+ break;
+ }
+ default:
+ {
+ panic("aic7xxx: Unknown REQINIT message type.\n");
+ break;
+ }
+ } /* End of switch(p->msg_type) */
+}
+
+/*+F*************************************************************************
+ * Function:
+ * aic7xxx_handle_scsiint
+ *
+ * Description:
+ * Interrupt handler for SCSI interrupts (SCSIINT).
+ *-F*************************************************************************/
+static void
+aic7xxx_handle_scsiint(struct aic7xxx_host *p, unsigned char intstat)
+{
+ unsigned char scb_index;
+ unsigned char status;
+ struct aic7xxx_scb *scb;
+
+ scb_index = aic_inb(p, SCB_TAG);
+ status = aic_inb(p, SSTAT1);
+
+ if (scb_index < p->scb_data->numscbs)
+ {
+ scb = p->scb_data->scb_array[scb_index];
+ if ((scb->flags & SCB_ACTIVE) == 0)
+ {
+ scb = NULL;
+ }
+ }
+ else
+ {
+ scb = NULL;
+ }
+
+
+ if ((status & SCSIRSTI) != 0)
+ {
+ int channel;
+
+ if ( (p->chip & AHC_CHIPID_MASK) == AHC_AIC7770 )
+ channel = (aic_inb(p, SBLKCTL) & SELBUSB) >> 3;
+ else
+ channel = 0;
+
+ if (aic7xxx_verbose & VERBOSE_RESET)
+ printk(WARN_LEAD "Someone else reset the channel!!\n",
+ p->host_no, channel, -1, -1);
+ /*
+ * Go through and abort all commands for the channel, but do not
+ * reset the channel again.
+ */
+ aic7xxx_reset_channel(p, channel, /* Initiate Reset */ FALSE);
+ aic7xxx_run_done_queue(p, FALSE);
+ scb = NULL;
+ }
+ else if ( ((status & BUSFREE) != 0) && ((status & SELTO) == 0) )
+ {
+ /*
+ * First look at what phase we were last in. If it's message-out,
+ * chances are pretty good that the bus free was in response to
+ * one of our abort requests.
+ */
+ unsigned char lastphase = aic_inb(p, LASTPHASE);
+ unsigned char saved_tcl = aic_inb(p, SAVED_TCL);
+ unsigned char target = (saved_tcl >> 4) & 0x0F;
+ int channel;
+ int printerror = TRUE;
+
+ if ( (p->chip & AHC_CHIPID_MASK) == AHC_AIC7770 )
+ channel = (aic_inb(p, SBLKCTL) & SELBUSB) >> 3;
+ else
+ channel = 0;
+
+ aic_outb(p, aic_inb(p, SCSISEQ) & (ENSELI|ENRSELI|ENAUTOATNP),
+ SCSISEQ);
+ if (lastphase == P_MESGOUT)
+ {
+ unsigned char message;
+
+ message = aic_inb(p, SINDEX);
+
+ if ((message == MSG_ABORT) || (message == MSG_ABORT_TAG))
+ {
+ if (aic7xxx_verbose & VERBOSE_ABORT_PROCESS)
+ printk(INFO_LEAD "SCB %d abort delivered.\n", p->host_no,
+ CTL_OF_SCB(scb), scb->hscb->tag);
+ aic7xxx_reset_device(p, target, channel, ALL_LUNS,
+ (message == MSG_ABORT) ? SCB_LIST_NULL : scb->hscb->tag );
+ aic7xxx_run_done_queue(p, FALSE);
+ scb = NULL;
+ printerror = 0;
+ }
+ else if (message == MSG_BUS_DEV_RESET)
+ {
+ aic7xxx_handle_device_reset(p, target, channel);
+ scb = NULL;
+ printerror = 0;
+ }
+ }
+ if (printerror != 0)
+ {
+ if (scb != NULL)
+ {
+ unsigned char tag;
+
+ if ((scb->hscb->control & TAG_ENB) != 0)
+ {
+ tag = scb->hscb->tag;
+ }
+ else
+ {
+ tag = SCB_LIST_NULL;
+ }
+ aic7xxx_reset_device(p, target, channel, ALL_LUNS, tag);
+ aic7xxx_run_done_queue(p, FALSE);
+ }
+ printk(INFO_LEAD "Unexpected busfree, LASTPHASE = 0x%x, "
+ "SEQADDR = 0x%x\n", p->host_no, channel, target, -1, lastphase,
+ (aic_inb(p, SEQADDR1) << 8) | aic_inb(p, SEQADDR0));
+ scb = NULL;
+ }
+ aic_outb(p, MSG_NOOP, MSG_OUT);
+ aic_outb(p, aic_inb(p, SIMODE1) & ~(ENBUSFREE|ENREQINIT),
+ SIMODE1);
+ p->flags &= ~AHC_HANDLING_REQINITS;
+ aic_outb(p, CLRBUSFREE, CLRSINT1);
+ aic_outb(p, CLRSCSIINT, CLRINT);
+ restart_sequencer(p);
+ unpause_sequencer(p, TRUE);
+ }
+ else if ((status & SELTO) != 0)
+ {
+ unsigned char scbptr;
+ unsigned char nextscb;
+ Scsi_Cmnd *cmd;
+
+ scbptr = aic_inb(p, WAITING_SCBH);
+ if (scbptr > p->scb_data->maxhscbs)
+ {
+ /*
+ * I'm still trying to track down exactly how this happens, but until
+ * I find it, this code will make sure we aren't passing bogus values
+ * into the SCBPTR register, even if that register will just wrap
+ * things around, we still don't like having out of range variables.
+ *
+ * NOTE: Don't check the aic7xxx_verbose variable, I want this message
+ * to always be displayed.
+ */
+ printk(INFO_LEAD "Invalid WAITING_SCBH value %d, improvising.\n",
+ p->host_no, -1, -1, -1, scbptr);
+ if (p->scb_data->maxhscbs > 4)
+ scbptr &= (p->scb_data->maxhscbs - 1);
+ else
+ scbptr &= 0x03;
+ }
+ aic_outb(p, scbptr, SCBPTR);
+ scb_index = aic_inb(p, SCB_TAG);
+
+ scb = NULL;
+ if (scb_index < p->scb_data->numscbs)
+ {
+ scb = p->scb_data->scb_array[scb_index];
+ if ((scb->flags & SCB_ACTIVE) == 0)
+ {
+ scb = NULL;
+ }
+ }
+ if (scb == NULL)
+ {
+ printk(WARN_LEAD "Referenced SCB %d not valid during SELTO.\n",
+ p->host_no, -1, -1, -1, scb_index);
+ printk(KERN_WARNING " SCSISEQ = 0x%x SEQADDR = 0x%x SSTAT0 = 0x%x "
+ "SSTAT1 = 0x%x\n", aic_inb(p, SCSISEQ),
+ aic_inb(p, SEQADDR0) | (aic_inb(p, SEQADDR1) << 8),
+ aic_inb(p, SSTAT0), aic_inb(p, SSTAT1));
+ if (aic7xxx_panic_on_abort)
+ aic7xxx_panic_abort(p, NULL);
+ }
+ else
+ {
+ cmd = scb->cmd;
+ cmd->result = (DID_TIME_OUT << 16);
+
+ /*
+ * Clear out this hardware SCB
+ */
+ aic_outb(p, 0, SCB_CONTROL);
+
+ /*
+ * Clear out a few values in the card that are in an undetermined
+ * state.
+ */
+ aic_outb(p, MSG_NOOP, MSG_OUT);
+
+ /*
+ * Shift the waiting for selection queue forward
+ */
+ nextscb = aic_inb(p, SCB_NEXT);
+ aic_outb(p, nextscb, WAITING_SCBH);
+
+ /*
+ * Put this SCB back on the free list.
+ */
+ aic7xxx_add_curscb_to_free_list(p);
+ /*
+ * XXX - If we queued an abort tag, go clean up the disconnected list.
+ * We know that this particular SCB had to be the queued abort since
+ * the disconnected SCB would have gotten a reconnect instead.
+ * However, if this is an abort command, then DID_TIMEOUT isn't
+ * appropriate, neither is returning the command for that matter.
+ * What we need to do then is to let the command timeout again so
+ * we get a reset since this abort just failed.
+ */
+#ifdef AIC7XXX_VERBOSE_DEBUGGING
+ if (aic7xxx_verbose > 0xffff)
+ printk(INFO_LEAD "Selection Timeout.\n", p->host_no, CTL_OF_SCB(scb));
+#endif
+ if (p->flags & SCB_QUEUED_ABORT)
+ {
+ cmd->result = 0;
+ scb->flags &= ~SCB_QUEUED_ABORT;
+ scb = NULL;
+ }
+ }
+ /*
+ * Restarting the sequencer will stop the selection and make sure devices
+ * are allowed to reselect in.
+ */
+ aic_outb(p, 0, SCSISEQ);
+ aic_outb(p, aic_inb(p, SIMODE1) & ~(ENREQINIT|ENBUSFREE), SIMODE1);
+ p->flags &= ~AHC_HANDLING_REQINITS;
+ aic_outb(p, CLRSELTIMEO | CLRBUSFREE, CLRSINT1);
+ aic_outb(p, CLRSCSIINT, CLRINT);
+ restart_sequencer(p);
+ unpause_sequencer(p, TRUE);
+ }
+ else if (scb == NULL)
+ {
+ printk(WARN_LEAD "aic7xxx_isr - referenced scb not valid "
+ "during scsiint 0x%x scb(%d)\n"
+ " SIMODE0 0x%x, SIMODE1 0x%x, SSTAT0 0x%x, SEQADDR 0x%x\n",
+ p->host_no, -1, -1, -1, status, scb_index, aic_inb(p, SIMODE0),
+ aic_inb(p, SIMODE1), aic_inb(p, SSTAT0),
+ (aic_inb(p, SEQADDR1) << 8) | aic_inb(p, SEQADDR0));
+ /*
+ * Turn off the interrupt and set status to zero, so that it
+ * falls through the rest of the SCSIINT code.
+ */
+ aic_outb(p, status, CLRSINT1);
+ aic_outb(p, CLRSCSIINT, CLRINT);
+ unpause_sequencer(p, /* unpause always */ TRUE);
+ scb = NULL;
+ }
+ else if (status & SCSIPERR)
+ {
+ /*
+ * Determine the bus phase and queue an appropriate message.
+ */
+ char *phase;
+ Scsi_Cmnd *cmd;
+ unsigned char mesg_out = MSG_NOOP;
+ unsigned char lastphase = aic_inb(p, LASTPHASE);
+
+ cmd = scb->cmd;
+ switch (lastphase)
+ {
+ case P_DATAOUT:
+ phase = "Data-Out";
+ break;
+ case P_DATAIN:
+ phase = "Data-In";
+ mesg_out = MSG_INITIATOR_DET_ERR;
+ break;
+ case P_COMMAND:
+ phase = "Command";
+ break;
+ case P_MESGOUT:
+ phase = "Message-Out";
+ break;
+ case P_STATUS:
+ phase = "Status";
+ mesg_out = MSG_INITIATOR_DET_ERR;
+ break;
+ case P_MESGIN:
+ phase = "Message-In";
+ mesg_out = MSG_PARITY_ERROR;
+ break;
+ default:
+ phase = "unknown";
+ break;
+ }
+
+ /*
+ * A parity error has occurred during a data
+ * transfer phase. Flag it and continue.
+ */
+ printk(WARN_LEAD "Parity error during %s phase.\n",
+ p->host_no, CTL_OF_SCB(scb), phase);
+
+ /*
+ * We've set the hardware to assert ATN if we get a parity
+ * error on "in" phases, so all we need to do is stuff the
+ * message buffer with the appropriate message. "In" phases
+ * have set mesg_out to something other than MSG_NOP.
+ */
+ if (mesg_out != MSG_NOOP)
+ {
+ aic_outb(p, mesg_out, MSG_OUT);
+ scb = NULL;
+ }
+ aic_outb(p, CLRSCSIPERR, CLRSINT1);
+ aic_outb(p, CLRSCSIINT, CLRINT);
+ unpause_sequencer(p, /* unpause_always */ TRUE);
+ }
+ else if ( (status & REQINIT) &&
+ (p->flags & AHC_HANDLING_REQINITS) )
+ {
+#ifdef AIC7XXX_VERBOSE_DEBUGGING
+ if (aic7xxx_verbose > 0xffff)
+ printk(INFO_LEAD "Handling REQINIT, SSTAT1=0x%x.\n", p->host_no,
+ CTL_OF_SCB(scb), aic_inb(p, SSTAT1));
+#endif
+ aic7xxx_handle_reqinit(p, scb);
+ return;
+ }
+ else
+ {
+ /*
+ * We don't know what's going on. Turn off the
+ * interrupt source and try to continue.
+ */
+ if (aic7xxx_verbose & VERBOSE_SCSIINT)
+ printk(INFO_LEAD "Unknown SCSIINT status, SSTAT1(0x%x).\n",
+ p->host_no, -1, -1, -1, status);
+ aic_outb(p, status, CLRSINT1);
+ aic_outb(p, CLRSCSIINT, CLRINT);
+ unpause_sequencer(p, /* unpause always */ TRUE);
+ scb = NULL;
+ }
+ if (scb != NULL)
+ {
+ aic7xxx_done(p, scb);
+ }
+}
+
+#ifdef AIC7XXX_VERBOSE_DEBUGGING
+static void
+aic7xxx_check_scbs(struct aic7xxx_host *p, char *buffer)
+{
+ unsigned char saved_scbptr, free_scbh, dis_scbh, wait_scbh, temp;
+ int i, bogus, lost;
+ static unsigned char scb_status[AIC7XXX_MAXSCB];
+
+#define SCB_NO_LIST 0
+#define SCB_FREE_LIST 1
+#define SCB_WAITING_LIST 2
+#define SCB_DISCONNECTED_LIST 4
+#define SCB_CURRENTLY_ACTIVE 8
+
+ /*
+ * Note, these checks will fail on a regular basis once the machine moves
+ * beyond the bus scan phase. The problem is race conditions concerning
+ * the scbs and where they are linked in. When you have 30 or so commands
+ * outstanding on the bus, and run this twice with every interrupt, the
+ * chances get pretty good that you'll catch the sequencer with an SCB
+ * only partially linked in. Therefore, once we pass the scan phase
+ * of the bus, we really should disable this function.
+ */
+ bogus = FALSE;
+ memset(&scb_status[0], 0, sizeof(scb_status));
+ pause_sequencer(p);
+ saved_scbptr = aic_inb(p, SCBPTR);
+ if (saved_scbptr >= p->scb_data->maxhscbs)
+ {
+ printk("Bogus SCBPTR %d\n", saved_scbptr);
+ bogus = TRUE;
+ }
+ scb_status[saved_scbptr] = SCB_CURRENTLY_ACTIVE;
+ free_scbh = aic_inb(p, FREE_SCBH);
+ if ( (free_scbh != SCB_LIST_NULL) &&
+ (free_scbh >= p->scb_data->maxhscbs) )
+ {
+ printk("Bogus FREE_SCBH %d\n", free_scbh);
+ bogus = TRUE;
+ }
+ else
+ {
+ temp = free_scbh;
+ while( (temp != SCB_LIST_NULL) && (temp < p->scb_data->maxhscbs) )
+ {
+ if(scb_status[temp] & 0x07)
+ {
+ printk("HSCB %d on multiple lists, status 0x%02x", temp,
+ scb_status[temp] | SCB_FREE_LIST);
+ bogus = TRUE;
+ }
+ scb_status[temp] |= SCB_FREE_LIST;
+ aic_outb(p, temp, SCBPTR);
+ temp = aic_inb(p, SCB_NEXT);
+ }
+ }
+
+ dis_scbh = aic_inb(p, DISCONNECTED_SCBH);
+ if ( (dis_scbh != SCB_LIST_NULL) &&
+ (dis_scbh >= p->scb_data->maxhscbs) )
+ {
+ printk("Bogus DISCONNECTED_SCBH %d\n", dis_scbh);
+ bogus = TRUE;
+ }
+ else
+ {
+ temp = dis_scbh;
+ while( (temp != SCB_LIST_NULL) && (temp < p->scb_data->maxhscbs) )
+ {
+ if(scb_status[temp] & 0x07)
+ {
+ printk("HSCB %d on multiple lists, status 0x%02x", temp,
+ scb_status[temp] | SCB_DISCONNECTED_LIST);
+ bogus = TRUE;
+ }
+ scb_status[temp] |= SCB_DISCONNECTED_LIST;
+ aic_outb(p, temp, SCBPTR);
+ temp = aic_inb(p, SCB_NEXT);
+ }
+ }
+
+ wait_scbh = aic_inb(p, WAITING_SCBH);
+ if ( (wait_scbh != SCB_LIST_NULL) &&
+ (wait_scbh >= p->scb_data->maxhscbs) )
+ {
+ printk("Bogus WAITING_SCBH %d\n", wait_scbh);
+ bogus = TRUE;
+ }
+ else
+ {
+ temp = wait_scbh;
+ while( (temp != SCB_LIST_NULL) && (temp < p->scb_data->maxhscbs) )
+ {
+ if(scb_status[temp] & 0x07)
+ {
+ printk("HSCB %d on multiple lists, status 0x%02x", temp,
+ scb_status[temp] | SCB_WAITING_LIST);
+ bogus = TRUE;
+ }
+ scb_status[temp] |= SCB_WAITING_LIST;
+ aic_outb(p, temp, SCBPTR);
+ temp = aic_inb(p, SCB_NEXT);
+ }
+ }
+
+ lost=0;
+ for(i=0; i < p->scb_data->maxhscbs; i++)
+ {
+ aic_outb(p, i, SCBPTR);
+ temp = aic_inb(p, SCB_NEXT);
+ if ( ((temp != SCB_LIST_NULL) &&
+ (temp >= p->scb_data->maxhscbs)) )
+ {
+ printk("HSCB %d bad, SCB_NEXT invalid(%d).\n", i, temp);
+ bogus = TRUE;
+ }
+ if ( temp == i )
+ {
+ printk("HSCB %d bad, SCB_NEXT points to self.\n", i);
+ bogus = TRUE;
+ }
+ temp = aic_inb(p, SCB_PREV);
+ if ((temp != SCB_LIST_NULL) &&
+ (temp >= p->scb_data->maxhscbs))
+ {
+ printk("HSCB %d bad, SCB_PREV invalid(%d).\n", i, temp);
+ bogus = TRUE;
+ }
+ if (scb_status[i] == 0)
+ lost++;
+ if (lost > 1)
+ {
+ printk("Too many lost scbs.\n");
+ bogus=TRUE;
+ }
+ }
+ aic_outb(p, saved_scbptr, SCBPTR);
+ unpause_sequencer(p, FALSE);
+ if (bogus)
+ {
+ printk("Bogus parameters found in card SCB array structures.\n");
+ printk("%s\n", buffer);
+ aic7xxx_panic_abort(p, NULL);
+ }
+ return;
+}
+#endif
+
+/*+F*************************************************************************
+ * Function:
+ * aic7xxx_isr
+ *
+ * Description:
+ * SCSI controller interrupt handler.
+ *-F*************************************************************************/
+static void
+aic7xxx_isr(int irq, void *dev_id, struct pt_regs *regs)
+{
+ struct aic7xxx_host *p;
+ unsigned char intstat;
+
+ p = (struct aic7xxx_host *)dev_id;
+
+ /*
+ * Just a few sanity checks. Make sure that we have an int pending.
+ * Also, if PCI, then we are going to check for a PCI bus error status
+ * should we get too many spurious interrupts.
+ */
+ if (!((intstat = aic_inb(p, INTSTAT)) & INT_PEND))
+ {
+#ifdef CONFIG_PCI
+ if ( (p->chip & AHC_PCI) && (p->spurious_int > 500) &&
+ !(p->flags & AHC_HANDLING_REQINITS) )
+ {
+ if ( aic_inb(p, ERROR) & PCIERRSTAT )
+ {
+ aic7xxx_pci_intr(p);
+ }
+ p->spurious_int = 0;
+ }
+ else if ( !(p->flags & AHC_HANDLING_REQINITS) )
+ {
+ p->spurious_int++;
+ }
+#endif
+ return;
+ }
+
+ p->spurious_int = 0;
+
+ /*
+ * Keep track of interrupts for /proc/scsi
+ */
+ p->isr_count++;
+
+#ifdef AIC7XXX_VERBOSE_DEBUGGING
+ if ( (p->isr_count < 16) && (aic7xxx_verbose > 0xffff) &&
+ (aic7xxx_panic_on_abort) && (p->flags & AHC_PAGESCBS) )
+ aic7xxx_check_scbs(p, "Bogus settings at start of interrupt.");
+#endif
+
+ /*
+ * Handle all the interrupt sources - especially for SCSI
+ * interrupts, we won't get a second chance at them.
+ */
+ if (intstat & CMDCMPLT)
+ {
+ struct aic7xxx_scb *scb = NULL;
+ Scsi_Cmnd *cmd;
+ unsigned char scb_index;
+
+#ifdef AIC7XXX_VERBOSE_DEBUGGING
+ if(aic7xxx_verbose > 0xffff)
+ printk(INFO_LEAD "Command Complete Int.\n", p->host_no, -1, -1, -1);
+#endif
+
+ /*
+ * Clear interrupt status before running the completion loop.
+ * This eliminates a race condition whereby a command could
+ * complete between the last check of qoutfifo and the
+ * CLRCMDINT statement. This would result in us thinking the
+ * qoutfifo was empty when it wasn't, and in actuality be a lost
+ * completion interrupt. With multiple devices or tagged queueing
+ * this could be very bad if we caught all but the last completion
+ * and no more are imediately sent.
+ */
+ aic_outb(p, CLRCMDINT, CLRINT);
+ /*
+ * The sequencer will continue running when it
+ * issues this interrupt. There may be >1 commands
+ * finished, so loop until we've processed them all.
+ */
+
+ while (p->qoutfifo[p->qoutfifonext] != SCB_LIST_NULL)
+ {
+ scb_index = p->qoutfifo[p->qoutfifonext];
+ p->qoutfifo[p->qoutfifonext++] = SCB_LIST_NULL;
+ if ( scb_index >= p->scb_data->numscbs )
+ scb = NULL;
+ else
+ scb = p->scb_data->scb_array[scb_index];
+ if (scb == NULL)
+ {
+ printk(WARN_LEAD "CMDCMPLT with invalid SCB index %d\n", p->host_no,
+ -1, -1, -1, scb_index);
+ continue;
+ }
+ else if (!(scb->flags & SCB_ACTIVE) || (scb->cmd == NULL))
+ {
+ printk(WARN_LEAD "CMDCMPLT without command for SCB %d, SCB flags "
+ "0x%x, cmd 0x%lx\n", p->host_no, -1, -1, -1, scb_index, scb->flags,
+ (unsigned long) scb->cmd);
+ continue;
+ }
+ else if (scb->flags & SCB_QUEUED_ABORT)
+ {
+ pause_sequencer(p);
+ if ( ((aic_inb(p, LASTPHASE) & PHASE_MASK) != P_BUSFREE) &&
+ (aic_inb(p, SCB_TAG) == scb->hscb->tag) )
+ {
+ unpause_sequencer(p, FALSE);
+ continue;
+ }
+ aic7xxx_reset_device(p, scb->cmd->target, scb->cmd->channel,
+ scb->cmd->lun, scb->hscb->tag);
+ scb->flags &= ~(SCB_QUEUED_FOR_DONE | SCB_RESET | SCB_ABORT |
+ SCB_QUEUED_ABORT);
+ unpause_sequencer(p, FALSE);
+ }
+ else if (scb->flags & SCB_ABORT)
+ {
+ /*
+ * We started to abort this, but it completed on us, let it
+ * through as successful
+ */
+ scb->flags &= ~(SCB_ABORT|SCB_RESET);
+ }
+ switch (status_byte(scb->hscb->target_status))
+ {
+ case QUEUE_FULL:
+ case BUSY:
+ scb->hscb->target_status = 0;
+ scb->cmd->result = 0;
+ aic7xxx_error(scb->cmd) = DID_OK;
+ break;
+ default:
+ cmd = scb->cmd;
+ if (scb->hscb->residual_SG_segment_count != 0)
+ {
+ aic7xxx_calculate_residual(p, scb);
+ }
+ cmd->result |= (aic7xxx_error(cmd) << 16);
+ if (scb->tag_action)
+ p->dev_flags[TARGET_INDEX(cmd)] |=
+ DEVICE_TAGGED_SUCCESS | DEVICE_SUCCESS | DEVICE_PRESENT;
+ else
+ p->dev_flags[TARGET_INDEX(cmd)] |=
+ DEVICE_SUCCESS | DEVICE_PRESENT;
+ aic7xxx_done(p, scb);
+ break;
+ }
+ }
+ }
+
+ if (intstat & BRKADRINT)
+ {
+ int i;
+ unsigned char errno = aic_inb(p, ERROR);
+
+ printk(KERN_ERR "(scsi%d) BRKADRINT error(0x%x):\n", p->host_no, errno);
+ for (i = 0; i < NUMBER(hard_error); i++)
+ {
+ if (errno & hard_error[i].errno)
+ {
+ printk(KERN_ERR " %s\n", hard_error[i].errmesg);
+ }
+ }
+ printk(KERN_ERR "(scsi%d) SEQADDR=0x%x\n", p->host_no,
+ (((aic_inb(p, SEQADDR1) << 8) & 0x100) | aic_inb(p, SEQADDR0)));
+ if (aic7xxx_panic_on_abort)
+ aic7xxx_panic_abort(p, NULL);
+#ifdef CONFIG_PCI
+ if (errno & PCIERRSTAT)
+ aic7xxx_pci_intr(p);
+#endif
+ if (errno & (SQPARERR | ILLOPCODE | ILLSADDR))
+ {
+ sti();
+ panic("aic7xxx: unrecoverable BRKADRINT.\n");
+ }
+ if (errno & ILLHADDR)
+ {
+ printk(KERN_ERR "(scsi%d) BUG! Driver accessed chip without first "
+ "pausing controller!\n", p->host_no);
+ }
+#ifdef AIC7XXX_VERBOSE_DEBUGGING
+ if (errno & DPARERR)
+ {
+ if (aic_inb(p, DMAPARAMS) & DIRECTION)
+ printk("(scsi%d) while DMAing SCB from host to card.\n", p->host_no);
+ else
+ printk("(scsi%d) while DMAing SCB from card to host.\n", p->host_no);
+ }
+#endif
+ aic_outb(p, CLRPARERR | CLRBRKADRINT, CLRINT);
+ unpause_sequencer(p, FALSE);
+ }
+
+ if (intstat & SEQINT)
+ {
+ aic7xxx_handle_seqint(p, intstat);
+ }
+
+ if (intstat & SCSIINT)
+ {
+ aic7xxx_handle_scsiint(p, intstat);
+ }
+
+#ifdef AIC7XXX_VERBOSE_DEBUGGING
+ if ( (p->isr_count < 16) && (aic7xxx_verbose > 0xffff) &&
+ (aic7xxx_panic_on_abort) && (p->flags & AHC_PAGESCBS) )
+ aic7xxx_check_scbs(p, "Bogus settings at end of interrupt.");
+#endif
+
+}
+
+/*+F*************************************************************************
+ * Function:
+ * do_aic7xxx_isr
+ *
+ * Description:
+ * This is a gross hack to solve a problem in linux kernels 2.1.85 and
+ * above. Please, children, do not try this at home, and if you ever see
+ * anything like it, please inform the Gross Hack Police immediately
+ *-F*************************************************************************/
+static void
+do_aic7xxx_isr(int irq, void *dev_id, struct pt_regs *regs)
+{
+ unsigned long cpu_flags;
+ struct aic7xxx_host *p;
+
+ p = (struct aic7xxx_host *)dev_id;
+ if(!p)
+ return;
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,1,95)
+ spin_lock_irqsave(&io_request_lock, cpu_flags);
+ if(test_and_set_bit(AHC_IN_ISR_BIT, &p->flags))
+ {
+ return;
+ }
+ do
+ {
+ aic7xxx_isr(irq, dev_id, regs);
+ } while ( (aic_inb(p, INTSTAT) & INT_PEND) );
+ aic7xxx_done_cmds_complete(p);
+ aic7xxx_run_waiting_queues(p);
+ clear_bit(AHC_IN_ISR_BIT, &p->flags);
+ spin_unlock_irqrestore(&io_request_lock, cpu_flags);
+#else
+ if(set_bit(AHC_IN_ISR_BIT, (int *)&p->flags))
+ {
+ return;
+ }
+ DRIVER_LOCK
+ do
+ {
+ aic7xxx_isr(irq, dev_id, regs);
+ } while ( (aic_inb(p, INTSTAT) & INT_PEND) );
+ DRIVER_UNLOCK
+ aic7xxx_done_cmds_complete(p);
+ aic7xxx_run_waiting_queues(p);
+ clear_bit(AHC_IN_ISR_BIT, (int *)&p->flags);
+#endif
+}
+
+/*+F*************************************************************************
+ * Function:
+ * aic7xxx_device_queue_depth
+ *
+ * Description:
+ * Determines the queue depth for a given device. There are two ways
+ * a queue depth can be obtained for a tagged queueing device. One
+ * way is the default queue depth which is determined by whether
+ * AIC7XXX_CMDS_PER_LUN is defined. If it is defined, then it is used
+ * as the default queue depth. Otherwise, we use either 4 or 8 as the
+ * default queue depth (dependent on the number of hardware SCBs).
+ * The other way we determine queue depth is through the use of the
+ * aic7xxx_tag_info array which is enabled by defining
+ * AIC7XXX_TAGGED_QUEUEING_BY_DEVICE. This array can be initialized
+ * with queue depths for individual devices. It also allows tagged
+ * queueing to be [en|dis]abled for a specific adapter.
+ *-F*************************************************************************/
+static void
+aic7xxx_device_queue_depth(struct aic7xxx_host *p, Scsi_Device *device)
+{
+ int default_depth = 3;
+ unsigned char tindex;
+ unsigned short target_mask;
+
+ tindex = device->id | (device->channel << 3);
+ target_mask = (1 << tindex);
+
+ device->queue_depth = default_depth;
+ p->dev_mid_level_queue_depth[tindex] = 3;
+ p->dev_temp_queue_depth[tindex] = 1;
+ p->dev_max_queue_depth[tindex] = 1;
+ p->tagenable &= ~target_mask;
+
+ if (device->tagged_supported)
+ {
+ int tag_enabled = TRUE;
+
+#ifdef AIC7XXX_CMDS_PER_LUN
+ default_depth = AIC7XXX_CMDS_PER_LUN;
+#else
+ default_depth = 8; /* Not many SCBs to work with. */
+#endif
+
+ if (!(p->discenable & target_mask))
+ {
+ if (aic7xxx_verbose & VERBOSE_NEGOTIATION2)
+ printk(INFO_LEAD "Disconnection disabled, unable to "
+ "enable tagged queueing.\n",
+ p->host_no, device->channel, device->id, device->lun);
+ }
+ else
+ {
+ if (p->instance >= NUMBER(aic7xxx_tag_info))
+ {
+ static int print_warning = TRUE;
+ if(print_warning)
+ {
+ printk(KERN_INFO "aic7xxx: WARNING, insufficient tag_info instances for"
+ " installed controllers.\n");
+ printk(KERN_INFO "aic7xxx: Please update the aic7xxx_tag_info array in"
+ " the aic7xxx.c source file.\n");
+ print_warning = FALSE;
+ }
+ device->queue_depth = default_depth;
+ }
+ else
+ {
+
+ if (aic7xxx_tag_info[p->instance].tag_commands[tindex] == 255)
+ {
+ tag_enabled = FALSE;
+ device->queue_depth = 3; /* Tagged queueing is disabled. */
+ }
+ else if (aic7xxx_tag_info[p->instance].tag_commands[tindex] == 0)
+ {
+ device->queue_depth = default_depth;
+ }
+ else
+ {
+ device->queue_depth =
+ aic7xxx_tag_info[p->instance].tag_commands[tindex];
+ }
+ }
+ if ((device->tagged_queue == 0) && tag_enabled)
+ {
+ if (aic7xxx_verbose & VERBOSE_NEGOTIATION2)
+ {
+ printk(INFO_LEAD "Enabled tagged queuing, queue depth %d.\n",
+ p->host_no, device->channel, device->id,
+ device->lun, device->queue_depth);
+ }
+ p->dev_max_queue_depth[tindex] = device->queue_depth;
+ p->dev_temp_queue_depth[tindex] = device->queue_depth;
+ p->dev_mid_level_queue_depth[tindex] = device->queue_depth;
+ p->tagenable |= target_mask;
+ p->orderedtag |= target_mask;
+ device->tagged_queue = 1;
+ device->current_tag = SCB_LIST_NULL;
+ }
+ }
+ }
+}
+
+/*+F*************************************************************************
+ * Function:
+ * aic7xxx_select_queue_depth
+ *
+ * Description:
+ * Sets the queue depth for each SCSI device hanging off the input
+ * host adapter. We use a queue depth of 2 for devices that do not
+ * support tagged queueing. If AIC7XXX_CMDS_PER_LUN is defined, we
+ * use that for tagged queueing devices; otherwise we use our own
+ * algorithm for determining the queue depth based on the maximum
+ * SCBs for the controller.
+ *-F*************************************************************************/
+static void
+aic7xxx_select_queue_depth(struct Scsi_Host *host,
+ Scsi_Device *scsi_devs)
+{
+ Scsi_Device *device;
+ struct aic7xxx_host *p = (struct aic7xxx_host *) host->hostdata;
+ int scbnum;
+
+ scbnum = 0;
+ for (device = scsi_devs; device != NULL; device = device->next)
+ {
+ if (device->host == host)
+ {
+ aic7xxx_device_queue_depth(p, device);
+ scbnum += device->queue_depth;
+ }
+ }
+ while (scbnum > p->scb_data->numscbs)
+ {
+ /*
+ * Pre-allocate the needed SCBs to get around the possibility of having
+ * to allocate some when memory is more or less exhausted and we need
+ * the SCB in order to perform a swap operation (possible deadlock)
+ */
+ if ( aic7xxx_allocate_scb(p) == 0 )
+ return;
+ }
+}
+
+/*+F*************************************************************************
+ * Function:
+ * aic7xxx_probe
+ *
+ * Description:
+ * Probing for EISA boards: it looks like the first two bytes
+ * are a manufacturer code - three characters, five bits each:
+ *
+ * BYTE 0 BYTE 1 BYTE 2 BYTE 3
+ * ?1111122 22233333 PPPPPPPP RRRRRRRR
+ *
+ * The characters are baselined off ASCII '@', so add that value
+ * to each to get the real ASCII code for it. The next two bytes
+ * appear to be a product and revision number, probably vendor-
+ * specific. This is what is being searched for at each port,
+ * and what should probably correspond to the ID= field in the
+ * ECU's .cfg file for the card - if your card is not detected,
+ * make sure your signature is listed in the array.
+ *
+ * The fourth byte's lowest bit seems to be an enabled/disabled
+ * flag (rest of the bits are reserved?).
+ *
+ * NOTE: This function is only needed on Intel and Alpha platforms,
+ * the other platforms we support don't have EISA/VLB busses. So,
+ * we #ifdef this entire function to avoid compiler warnings about
+ * an unused function.
+ *-F*************************************************************************/
+#if defined(__i386__) || defined(__alpha__)
+static int
+aic7xxx_probe(int slot, int base, ahc_flag_type *flags)
+{
+ int i;
+ unsigned char buf[4];
+
+ static struct {
+ int n;
+ unsigned char signature[sizeof(buf)];
+ ahc_chip type;
+ int bios_disabled;
+ } AIC7xxx[] = {
+ { 4, { 0x04, 0x90, 0x77, 0x70 },
+ AHC_AIC7770|AHC_EISA, FALSE }, /* mb 7770 */
+ { 4, { 0x04, 0x90, 0x77, 0x71 },
+ AHC_AIC7770|AHC_EISA, FALSE }, /* host adapter 274x */
+ { 4, { 0x04, 0x90, 0x77, 0x56 },
+ AHC_AIC7770|AHC_VL, FALSE }, /* 284x BIOS enabled */
+ { 4, { 0x04, 0x90, 0x77, 0x57 },
+ AHC_AIC7770|AHC_VL, TRUE } /* 284x BIOS disabled */
+ };
+
+ /*
+ * The VL-bus cards need to be primed by
+ * writing before a signature check.
+ */
+ for (i = 0; i < sizeof(buf); i++)
+ {
+ outb(0x80 + i, base);
+ buf[i] = inb(base + i);
+ }
+
+ for (i = 0; i < NUMBER(AIC7xxx); i++)
+ {
+ /*
+ * Signature match on enabled card?
+ */
+ if (!memcmp(buf, AIC7xxx[i].signature, AIC7xxx[i].n))
+ {
+ if (inb(base + 4) & 1)
+ {
+ if (AIC7xxx[i].bios_disabled)
+ {
+ *flags |= AHC_USEDEFAULTS;
+ }
+ else
+ {
+ *flags |= AHC_BIOS_ENABLED;
+ }
+ return (i);
+ }
+
+ printk("aic7xxx: <Adaptec 7770 SCSI Host Adapter> "
+ "disabled at slot %d, ignored.\n", slot);
+ }
+ }
+
+ return (-1);
+}
+#endif /* (__i386__) || (__alpha__) */
+
+
+/*+F*************************************************************************
+ * Function:
+ * read_2840_seeprom
+ *
+ * Description:
+ * Reads the 2840 serial EEPROM and returns 1 if successful and 0 if
+ * not successful.
+ *
+ * See read_seeprom (for the 2940) for the instruction set of the 93C46
+ * chip.
+ *
+ * The 2840 interface to the 93C46 serial EEPROM is through the
+ * STATUS_2840 and SEECTL_2840 registers. The CS_2840, CK_2840, and
+ * DO_2840 bits of the SEECTL_2840 register are connected to the chip
+ * select, clock, and data out lines respectively of the serial EEPROM.
+ * The DI_2840 bit of the STATUS_2840 is connected to the data in line
+ * of the serial EEPROM. The EEPROM_TF bit of STATUS_2840 register is
+ * useful in that it gives us an 800 nsec timer. After a read from the
+ * SEECTL_2840 register the timing flag is cleared and goes high 800 nsec
+ * later.
+ *-F*************************************************************************/
+static int
+read_284x_seeprom(struct aic7xxx_host *p, struct seeprom_config *sc)
+{
+ int i = 0, k = 0;
+ unsigned char temp;
+ unsigned short checksum = 0;
+ unsigned short *seeprom = (unsigned short *) sc;
+ struct seeprom_cmd {
+ unsigned char len;
+ unsigned char bits[3];
+ };
+ struct seeprom_cmd seeprom_read = {3, {1, 1, 0}};
+
+#define CLOCK_PULSE(p) \
+ while ((aic_inb(p, STATUS_2840) & EEPROM_TF) == 0) \
+ { \
+ ; /* Do nothing */ \
+ } \
+ (void) aic_inb(p, SEECTL_2840);
+
+ /*
+ * Read the first 32 registers of the seeprom. For the 2840,
+ * the 93C46 SEEPROM is a 1024-bit device with 64 16-bit registers
+ * but only the first 32 are used by Adaptec BIOS. The loop
+ * will range from 0 to 31.
+ */
+ for (k = 0; k < (sizeof(*sc) / 2); k++)
+ {
+ /*
+ * Send chip select for one clock cycle.
+ */
+ aic_outb(p, CK_2840 | CS_2840, SEECTL_2840);
+ CLOCK_PULSE(p);
+
+ /*
+ * Now we're ready to send the read command followed by the
+ * address of the 16-bit register we want to read.
+ */
+ for (i = 0; i < seeprom_read.len; i++)
+ {
+ temp = CS_2840 | seeprom_read.bits[i];
+ aic_outb(p, temp, SEECTL_2840);
+ CLOCK_PULSE(p);
+ temp = temp ^ CK_2840;
+ aic_outb(p, temp, SEECTL_2840);
+ CLOCK_PULSE(p);
+ }
+ /*
+ * Send the 6 bit address (MSB first, LSB last).
+ */
+ for (i = 5; i >= 0; i--)
+ {
+ temp = k;
+ temp = (temp >> i) & 1; /* Mask out all but lower bit. */
+ temp = CS_2840 | temp;
+ aic_outb(p, temp, SEECTL_2840);
+ CLOCK_PULSE(p);
+ temp = temp ^ CK_2840;
+ aic_outb(p, temp, SEECTL_2840);
+ CLOCK_PULSE(p);
+ }
+
+ /*
+ * Now read the 16 bit register. An initial 0 precedes the
+ * register contents which begins with bit 15 (MSB) and ends
+ * with bit 0 (LSB). The initial 0 will be shifted off the
+ * top of our word as we let the loop run from 0 to 16.
+ */
+ for (i = 0; i <= 16; i++)
+ {
+ temp = CS_2840;
+ aic_outb(p, temp, SEECTL_2840);
+ CLOCK_PULSE(p);
+ temp = temp ^ CK_2840;
+ seeprom[k] = (seeprom[k] << 1) | (aic_inb(p, STATUS_2840) & DI_2840);
+ aic_outb(p, temp, SEECTL_2840);
+ CLOCK_PULSE(p);
+ }
+ /*
+ * The serial EEPROM has a checksum in the last word. Keep a
+ * running checksum for all words read except for the last
+ * word. We'll verify the checksum after all words have been
+ * read.
+ */
+ if (k < (sizeof(*sc) / 2) - 1)
+ {
+ checksum = checksum + seeprom[k];
+ }
+
+ /*
+ * Reset the chip select for the next command cycle.
+ */
+ aic_outb(p, 0, SEECTL_2840);
+ CLOCK_PULSE(p);
+ aic_outb(p, CK_2840, SEECTL_2840);
+ CLOCK_PULSE(p);
+ aic_outb(p, 0, SEECTL_2840);
+ CLOCK_PULSE(p);
+ }
+
+#if 0
+ printk("Computed checksum 0x%x, checksum read 0x%x\n", checksum, sc->checksum);
+ printk("Serial EEPROM:");
+ for (k = 0; k < (sizeof(*sc) / 2); k++)
+ {
+ if (((k % 8) == 0) && (k != 0))
+ {
+ printk("\n ");
+ }
+ printk(" 0x%x", seeprom[k]);
+ }
+ printk("\n");
+#endif
+
+ if (checksum != sc->checksum)
+ {
+ printk("aic7xxx: SEEPROM checksum error, ignoring SEEPROM settings.\n");
+ return (0);
+ }
+
+ return (1);
+#undef CLOCK_PULSE
+}
+
+/*+F*************************************************************************
+ * Function:
+ * acquire_seeprom
+ *
+ * Description:
+ * Acquires access to the memory port on PCI controllers.
+ *-F*************************************************************************/
+static int
+acquire_seeprom(struct aic7xxx_host *p)
+{
+ int wait;
+
+ /*
+ * Request access of the memory port. When access is
+ * granted, SEERDY will go high. We use a 1 second
+ * timeout which should be near 1 second more than
+ * is needed. Reason: after the 7870 chip reset, there
+ * should be no contention.
+ */
+ aic_outb(p, SEEMS, SEECTL);
+ wait = 1000; /* 1000 msec = 1 second */
+ while ((wait > 0) && ((aic_inb(p, SEECTL) & SEERDY) == 0))
+ {
+ wait--;
+ mdelay(1); /* 1 msec */
+ }
+ if ((aic_inb(p, SEECTL) & SEERDY) == 0)
+ {
+ aic_outb(p, 0, SEECTL);
+ return (0);
+ }
+ return (1);
+}
+
+/*+F*************************************************************************
+ * Function:
+ * release_seeprom
+ *
+ * Description:
+ * Releases access to the memory port on PCI controllers.
+ *-F*************************************************************************/
+static void
+release_seeprom(struct aic7xxx_host *p)
+{
+ aic_outb(p, 0, SEECTL);
+}
+
+/*+F*************************************************************************
+ * Function:
+ * read_seeprom
+ *
+ * Description:
+ * Reads the serial EEPROM and returns 1 if successful and 0 if
+ * not successful.
+ *
+ * The instruction set of the 93C46/56/66 chips is as follows:
+ *
+ * Start OP
+ * Function Bit Code Address Data Description
+ * -------------------------------------------------------------------
+ * READ 1 10 A5 - A0 Reads data stored in memory,
+ * starting at specified address
+ * EWEN 1 00 11XXXX Write enable must precede
+ * all programming modes
+ * ERASE 1 11 A5 - A0 Erase register A5A4A3A2A1A0
+ * WRITE 1 01 A5 - A0 D15 - D0 Writes register
+ * ERAL 1 00 10XXXX Erase all registers
+ * WRAL 1 00 01XXXX D15 - D0 Writes to all registers
+ * EWDS 1 00 00XXXX Disables all programming
+ * instructions
+ * *Note: A value of X for address is a don't care condition.
+ * *Note: The 93C56 and 93C66 have 8 address bits.
+ *
+ *
+ * The 93C46 has a four wire interface: clock, chip select, data in, and
+ * data out. In order to perform one of the above functions, you need
+ * to enable the chip select for a clock period (typically a minimum of
+ * 1 usec, with the clock high and low a minimum of 750 and 250 nsec
+ * respectively. While the chip select remains high, you can clock in
+ * the instructions (above) starting with the start bit, followed by the
+ * OP code, Address, and Data (if needed). For the READ instruction, the
+ * requested 16-bit register contents is read from the data out line but
+ * is preceded by an initial zero (leading 0, followed by 16-bits, MSB
+ * first). The clock cycling from low to high initiates the next data
+ * bit to be sent from the chip.
+ *
+ * The 78xx interface to the 93C46 serial EEPROM is through the SEECTL
+ * register. After successful arbitration for the memory port, the
+ * SEECS bit of the SEECTL register is connected to the chip select.
+ * The SEECK, SEEDO, and SEEDI are connected to the clock, data out,
+ * and data in lines respectively. The SEERDY bit of SEECTL is useful
+ * in that it gives us an 800 nsec timer. After a write to the SEECTL
+ * register, the SEERDY goes high 800 nsec later. The one exception
+ * to this is when we first request access to the memory port. The
+ * SEERDY goes high to signify that access has been granted and, for
+ * this case, has no implied timing.
+ *-F*************************************************************************/
+static int
+read_seeprom(struct aic7xxx_host *p, int offset,
+ unsigned short *scarray, unsigned int len, seeprom_chip_type chip)
+{
+ int i = 0, k;
+ unsigned char temp;
+ unsigned short checksum = 0;
+ struct seeprom_cmd {
+ unsigned char len;
+ unsigned char bits[3];
+ };
+ struct seeprom_cmd seeprom_read = {3, {1, 1, 0}};
+
+#define CLOCK_PULSE(p) \
+ while ((aic_inb(p, SEECTL) & SEERDY) == 0) \
+ { \
+ ; /* Do nothing */ \
+ }
+
+ /*
+ * Request access of the memory port.
+ */
+ if (acquire_seeprom(p) == 0)
+ {
+ return (0);
+ }
+
+ /*
+ * Read 'len' registers of the seeprom. For the 7870, the 93C46
+ * SEEPROM is a 1024-bit device with 64 16-bit registers but only
+ * the first 32 are used by Adaptec BIOS. Some adapters use the
+ * 93C56 SEEPROM which is a 2048-bit device. The loop will range
+ * from 0 to 'len' - 1.
+ */
+ for (k = 0; k < len; k++)
+ {
+ /*
+ * Send chip select for one clock cycle.
+ */
+ aic_outb(p, SEEMS | SEECK | SEECS, SEECTL);
+ CLOCK_PULSE(p);
+
+ /*
+ * Now we're ready to send the read command followed by the
+ * address of the 16-bit register we want to read.
+ */
+ for (i = 0; i < seeprom_read.len; i++)
+ {
+ temp = SEEMS | SEECS | (seeprom_read.bits[i] << 1);
+ aic_outb(p, temp, SEECTL);
+ CLOCK_PULSE(p);
+ temp = temp ^ SEECK;
+ aic_outb(p, temp, SEECTL);
+ CLOCK_PULSE(p);
+ }
+ /*
+ * Send the 6 or 8 bit address (MSB first, LSB last).
+ */
+ for (i = ((int) chip - 1); i >= 0; i--)
+ {
+ temp = k + offset;
+ temp = (temp >> i) & 1; /* Mask out all but lower bit. */
+ temp = SEEMS | SEECS | (temp << 1);
+ aic_outb(p, temp, SEECTL);
+ CLOCK_PULSE(p);
+ temp = temp ^ SEECK;
+ aic_outb(p, temp, SEECTL);
+ CLOCK_PULSE(p);
+ }
+
+ /*
+ * Now read the 16 bit register. An initial 0 precedes the
+ * register contents which begins with bit 15 (MSB) and ends
+ * with bit 0 (LSB). The initial 0 will be shifted off the
+ * top of our word as we let the loop run from 0 to 16.
+ */
+ for (i = 0; i <= 16; i++)
+ {
+ temp = SEEMS | SEECS;
+ aic_outb(p, temp, SEECTL);
+ CLOCK_PULSE(p);
+ temp = temp ^ SEECK;
+ scarray[k] = (scarray[k] << 1) | (aic_inb(p, SEECTL) & SEEDI);
+ aic_outb(p, temp, SEECTL);
+ CLOCK_PULSE(p);
+ }
+
+ /*
+ * The serial EEPROM should have a checksum in the last word.
+ * Keep a running checksum for all words read except for the
+ * last word. We'll verify the checksum after all words have
+ * been read.
+ */
+ if (k < (len - 1))
+ {
+ checksum = checksum + scarray[k];
+ }
+
+ /*
+ * Reset the chip select for the next command cycle.
+ */
+ aic_outb(p, SEEMS, SEECTL);
+ CLOCK_PULSE(p);
+ aic_outb(p, SEEMS | SEECK, SEECTL);
+ CLOCK_PULSE(p);
+ aic_outb(p, SEEMS, SEECTL);
+ CLOCK_PULSE(p);
+ }
+
+ /*
+ * Release access to the memory port and the serial EEPROM.
+ */
+ release_seeprom(p);
+
+#if 0
+ printk("Computed checksum 0x%x, checksum read 0x%x\n",
+ checksum, scarray[len - 1]);
+ printk("Serial EEPROM:");
+ for (k = 0; k < len; k++)
+ {
+ if (((k % 8) == 0) && (k != 0))
+ {
+ printk("\n ");
+ }
+ printk(" 0x%x", scarray[k]);
+ }
+ printk("\n");
+#endif
+ if (checksum != scarray[len - 1])
+ {
+ return (0);
+ }
+
+ return (1);
+#undef CLOCK_PULSE
+}
+
+/*+F*************************************************************************
+ * Function:
+ * write_brdctl
+ *
+ * Description:
+ * Writes a value to the BRDCTL register.
+ *-F*************************************************************************/
+static void
+write_brdctl(struct aic7xxx_host *p, unsigned char value)
+{
+ unsigned char brdctl;
+
+ if ((p->chip & AHC_CHIPID_MASK) == AHC_AIC7895)
+ {
+ brdctl = BRDSTB;
+ if (p->flags & AHC_CHNLB)
+ brdctl |= BRDCS;
+ }
+ else if (p->features & AHC_ULTRA2)
+ brdctl = 0;
+ else
+ brdctl = BRDSTB | BRDCS;
+ aic_outb(p, brdctl, BRDCTL);
+ udelay(1);
+ brdctl |= value;
+ aic_outb(p, brdctl, BRDCTL);
+ udelay(1);
+ if (p->features & AHC_ULTRA2)
+ brdctl |= BRDSTB_ULTRA2;
+ else
+ brdctl &= ~BRDSTB;
+ aic_outb(p, brdctl, BRDCTL);
+ udelay(1);
+ if (p->features & AHC_ULTRA2)
+ brdctl = 0;
+ else
+ brdctl &= ~BRDCS;
+ aic_outb(p, brdctl, BRDCTL);
+ udelay(1);
+}
+
+/*+F*************************************************************************
+ * Function:
+ * read_brdctl
+ *
+ * Description:
+ * Reads the BRDCTL register.
+ *-F*************************************************************************/
+static unsigned char
+read_brdctl(struct aic7xxx_host *p)
+{
+ unsigned char brdctl, value;
+
+ if ((p->chip & AHC_CHIPID_MASK) == AHC_AIC7895)
+ {
+ brdctl = BRDRW;
+ if (p->flags & AHC_CHNLB)
+ brdctl |= BRDCS;
+ }
+ else if (p->features & AHC_ULTRA2)
+ brdctl = BRDRW_ULTRA2;
+ else
+ brdctl = BRDRW | BRDCS;
+ aic_outb(p, brdctl, BRDCTL);
+ udelay(1);
+ value = aic_inb(p, BRDCTL);
+ aic_outb(p, 0, BRDCTL);
+ udelay(1);
+ return (value);
+}
+
+/*+F*************************************************************************
+ * Function:
+ * aic785x_cable_detect
+ *
+ * Description:
+ * Detect the cables that are present on aic785x class controller chips
+ *-F*************************************************************************/
+static void
+aic785x_cable_detect(struct aic7xxx_host *p, int *int_50,
+ int *ext_present, int *eeprom)
+{
+ unsigned char brdctl;
+
+ aic_outb(p, BRDRW | BRDCS, BRDCTL);
+ udelay(1);
+ aic_outb(p, 0, BRDCTL);
+ udelay(1);
+ brdctl = aic_inb(p, BRDCTL);
+ udelay(1);
+ *int_50 = !(brdctl & BRDDAT5);
+ *ext_present = !(brdctl & BRDDAT6);
+ *eeprom = (aic_inb(p, SPIOCAP) & EEPROM);
+}
+
+/*+F*************************************************************************
+ * Function:
+ * aic787x_cable_detect
+ *
+ * Description:
+ * Detect the cables that are present on aic787x class controller chips
+ *
+ * NOTE: This functions assumes the SEEPROM will have already been aquired
+ * prior to invocation of this function.
+ *-F*************************************************************************/
+static void
+aic787x_cable_detect(struct aic7xxx_host *p, int *int_50, int *int_68,
+ int *ext_present, int *eeprom)
+{
+ unsigned char brdctl;
+
+ /*
+ * First read the status of our cables. Set the rom bank to
+ * 0 since the bank setting serves as a multiplexor for the
+ * cable detection logic. BRDDAT5 controls the bank switch.
+ */
+ write_brdctl(p, 0);
+
+ /*
+ * Now we read the state of the two internal connectors. BRDDAT6
+ * is internal 50, BRDDAT7 is internal 68. For each, the cable is
+ * present if the bit is 0
+ */
+ brdctl = read_brdctl(p);
+ *int_50 = !(brdctl & BRDDAT6);
+ *int_68 = !(brdctl & BRDDAT7);
+
+ /*
+ * Set the bank bit in brdctl and then read the external cable state
+ * and the EEPROM status
+ */
+ write_brdctl(p, BRDDAT5);
+ brdctl = read_brdctl(p);
+
+ *ext_present = !(brdctl & BRDDAT6);
+ *eeprom = !(brdctl & BRDDAT7);
+
+ /*
+ * We're done, the calling function will release the SEEPROM for us
+ */
+}
+
+/*+F*************************************************************************
+ * Function:
+ * aic787x_ultra2_term_detect
+ *
+ * Description:
+ * Detect the termination settings present on ultra2 class controllers
+ *
+ * NOTE: This functions assumes the SEEPROM will have already been aquired
+ * prior to invocation of this function.
+ *-F*************************************************************************/
+static void
+aic7xxx_ultra2_term_detect(struct aic7xxx_host *p, int *enableSE_low,
+ int *enableSE_high, int *enableLVD_low,
+ int *enableLVD_high, int *eprom_present)
+{
+ unsigned char brdctl;
+
+ brdctl = read_brdctl(p);
+
+ *eprom_present = (brdctl & BRDDAT7);
+ *enableSE_high = (brdctl & BRDDAT6);
+ *enableSE_low = (brdctl & BRDDAT5);
+ *enableLVD_high = (brdctl & BRDDAT4);
+ *enableLVD_low = (brdctl & BRDDAT3);
+}
+
+/*+F*************************************************************************
+ * Function:
+ * configure_termination
+ *
+ * Description:
+ * Configures the termination settings on PCI adapters that have
+ * SEEPROMs available.
+ *-F*************************************************************************/
+static void
+configure_termination(struct aic7xxx_host *p)
+{
+ int internal50_present = 0;
+ int internal68_present = 0;
+ int external_present = 0;
+ int eprom_present = 0;
+ int enableSE_low = 0;
+ int enableSE_high = 0;
+ int enableLVD_low = 0;
+ int enableLVD_high = 0;
+ unsigned char brddat = 0;
+ unsigned char max_target = 0;
+ unsigned char sxfrctl1 = aic_inb(p, SXFRCTL1);
+
+ if (acquire_seeprom(p))
+ {
+ if (p->features & (AHC_WIDE|AHC_TWIN))
+ max_target = 16;
+ else
+ max_target = 8;
+ aic_outb(p, SEEMS | SEECS, SEECTL);
+ sxfrctl1 &= ~STPWEN;
+ if ( (p->adapter_control & CFAUTOTERM) ||
+ (p->features & AHC_ULTRA2) )
+ {
+ if ( (p->adapter_control & CFAUTOTERM) && !(p->features & AHC_ULTRA2) )
+ {
+ printk(KERN_INFO "(scsi%d) Warning - detected auto-termination\n",
+ p->host_no);
+ printk(KERN_INFO "(scsi%d) Please verify driver detected settings are "
+ "correct.\n", p->host_no);
+ printk(KERN_INFO "(scsi%d) If not, then please properly set the device "
+ "termination\n", p->host_no);
+ printk(KERN_INFO "(scsi%d) in the Adaptec SCSI BIOS by hitting CTRL-A "
+ "when prompted\n", p->host_no);
+ printk(KERN_INFO "(scsi%d) during machine bootup.\n", p->host_no);
+ }
+ /* Configure auto termination. */
+
+ if (p->features & AHC_ULTRA2)
+ {
+ if (aic7xxx_override_term == -1)
+ aic7xxx_ultra2_term_detect(p, &enableSE_low, &enableSE_high,
+ &enableLVD_low, &enableLVD_high,
+ &eprom_present);
+ if (!(p->adapter_control & CFSEAUTOTERM))
+ {
+ enableSE_low = (p->adapter_control & CFSTERM);
+ enableSE_high = (p->adapter_control & CFWSTERM);
+ }
+ if (!(p->adapter_control & CFAUTOTERM))
+ {
+ enableLVD_low = enableLVD_high = (p->adapter_control & CFLVDSTERM);
+ }
+ internal50_present = 0;
+ internal68_present = 1;
+ external_present = 1;
+ }
+ else if ( (p->chip & AHC_CHIPID_MASK) >= AHC_AIC7870 )
+ {
+ aic787x_cable_detect(p, &internal50_present, &internal68_present,
+ &external_present, &eprom_present);
+ }
+ else
+ {
+ aic785x_cable_detect(p, &internal50_present, &external_present,
+ &eprom_present);
+ }
+
+ if (max_target <= 8)
+ internal68_present = 0;
+
+ if ( !(p->features & AHC_ULTRA2) )
+ {
+ if (max_target > 8)
+ {
+ printk(KERN_INFO "(scsi%d) Cables present (Int-50 %s, Int-68 %s, "
+ "Ext-68 %s)\n", p->host_no,
+ internal50_present ? "YES" : "NO",
+ internal68_present ? "YES" : "NO",
+ external_present ? "YES" : "NO");
+ }
+ else
+ {
+ printk(KERN_INFO "(scsi%d) Cables present (Int-50 %s, Ext-50 %s)\n",
+ p->host_no,
+ internal50_present ? "YES" : "NO",
+ external_present ? "YES" : "NO");
+ }
+ }
+ if (aic7xxx_verbose & VERBOSE_PROBE2)
+ printk(KERN_INFO "(scsi%d) EEPROM %s present.\n", p->host_no,
+ eprom_present ? "is" : "is not");
+
+ /*
+ * Now set the termination based on what we found. BRDDAT6
+ * controls wide termination enable.
+ * Flash Enable = BRDDAT7
+ * SE High Term Enable = BRDDAT6
+ * SE Low Term Enable = BRDDAT5 (7890)
+ * LVD High Term Enable = BRDDAT4 (7890)
+ */
+ if ( !(p->features & AHC_ULTRA2) &&
+ (internal50_present && internal68_present && external_present) )
+ {
+ printk(KERN_INFO "(scsi%d) Illegal cable configuration!! Only two\n",
+ p->host_no);
+ printk(KERN_INFO "(scsi%d) connectors on the SCSI controller may be "
+ "in use at a time!\n", p->host_no);
+ /*
+ * Force termination (low and high byte) on. This is safer than
+ * leaving it completely off, especially since this message comes
+ * most often from motherboard controllers that don't even have 3
+ * connectors, but instead are failing the cable detection.
+ */
+ internal50_present = external_present = 0;
+ enableSE_high = enableSE_low = 1;
+ }
+
+ if ((max_target > 8) &&
+ ((external_present == 0) || (internal68_present == 0) ||
+ (enableSE_high != 0)))
+ {
+ brddat |= BRDDAT6;
+ p->flags |= AHC_TERM_ENB_SE_HIGH;
+ if (aic7xxx_verbose & VERBOSE_PROBE2)
+ printk(KERN_INFO "(scsi%d) SE High byte termination Enabled\n",
+ p->host_no);
+ }
+
+ if ( (((internal50_present ? 1 : 0) +
+ (internal68_present ? 1 : 0) +
+ (external_present ? 1 : 0)) <= 1) ||
+ (enableSE_low != 0) )
+ {
+ if (p->features & AHC_ULTRA2)
+ brddat |= BRDDAT5;
+ else
+ sxfrctl1 |= STPWEN;
+ p->flags |= AHC_TERM_ENB_SE_LOW;
+ if (aic7xxx_verbose & VERBOSE_PROBE2)
+ printk(KERN_INFO "(scsi%d) SE Low byte termination Enabled\n",
+ p->host_no);
+ }
+
+ if (enableLVD_low != 0)
+ {
+ sxfrctl1 |= STPWEN;
+ p->flags |= AHC_TERM_ENB_LVD;
+ if (aic7xxx_verbose & VERBOSE_PROBE2)
+ printk(KERN_INFO "(scsi%d) LVD Low byte termination Enabled\n",
+ p->host_no);
+ }
+
+ if (enableLVD_high != 0)
+ {
+ brddat |= BRDDAT4;
+ if (aic7xxx_verbose & VERBOSE_PROBE2)
+ printk(KERN_INFO "(scsi%d) LVD High byte termination Enabled\n",
+ p->host_no);
+ }
+ }
+ else
+ {
+ if (p->adapter_control & CFSTERM)
+ {
+ if (p->features & AHC_ULTRA2)
+ brddat |= BRDDAT5;
+ else
+ sxfrctl1 |= STPWEN;
+ if (aic7xxx_verbose & VERBOSE_PROBE2)
+ printk(KERN_INFO "(scsi%d) SE Low byte termination Enabled\n",
+ p->host_no);
+ }
+
+ if (p->adapter_control & CFWSTERM)
+ {
+ brddat |= BRDDAT6;
+ if (aic7xxx_verbose & VERBOSE_PROBE2)
+ printk(KERN_INFO "(scsi%d) SE High byte termination Enabled\n",
+ p->host_no);
+ }
+ }
+ write_brdctl(p, brddat);
+ release_seeprom(p);
+ aic_outb(p, sxfrctl1, SXFRCTL1);
+ }
+}
+
+/*+F*************************************************************************
+ * Function:
+ * detect_maxscb
+ *
+ * Description:
+ * Detects the maximum number of SCBs for the controller and returns
+ * the count and a mask in p (p->maxscbs, p->qcntmask).
+ *-F*************************************************************************/
+static void
+detect_maxscb(struct aic7xxx_host *p)
+{
+ int i;
+
+ /*
+ * It's possible that we've already done this for multichannel
+ * adapters.
+ */
+ if (p->scb_data->maxhscbs == 0)
+ {
+ /*
+ * We haven't initialized the SCB settings yet. Walk the SCBs to
+ * determince how many there are.
+ */
+ aic_outb(p, 0, FREE_SCBH);
+
+ for (i = 0; i < AIC7XXX_MAXSCB; i++)
+ {
+ aic_outb(p, i, SCBPTR);
+ aic_outb(p, i, SCB_CONTROL);
+ if (aic_inb(p, SCB_CONTROL) != i)
+ break;
+ aic_outb(p, 0, SCBPTR);
+ if (aic_inb(p, SCB_CONTROL) != 0)
+ break;
+
+ aic_outb(p, i, SCBPTR);
+ aic_outb(p, 0, SCB_CONTROL); /* Clear the control byte. */
+ aic_outb(p, i + 1, SCB_NEXT); /* Set the next pointer. */
+ aic_outb(p, i - 1, SCB_PREV); /* Set the prev pointer. */
+ aic_outb(p, SCB_LIST_NULL, SCB_TAG); /* Make the tag invalid. */
+ aic_outb(p, SCB_LIST_NULL, SCB_BUSYTARGETS); /* no busy untagged */
+ aic_outb(p, SCB_LIST_NULL, SCB_BUSYTARGETS+1);/* targets active yet */
+ aic_outb(p, SCB_LIST_NULL, SCB_BUSYTARGETS+2);
+ aic_outb(p, SCB_LIST_NULL, SCB_BUSYTARGETS+3);
+ }
+
+ /* Make sure the last SCB terminates the free list. */
+ aic_outb(p, i - 1, SCBPTR);
+ aic_outb(p, SCB_LIST_NULL, SCB_NEXT);
+
+ /* Ensure we clear the first (0) SCBs control byte. */
+ aic_outb(p, 0, SCBPTR);
+ aic_outb(p, 0, SCB_CONTROL);
+
+ p->scb_data->maxhscbs = i;
+ /*
+ * Use direct indexing instead for speed
+ */
+ if ( i == AIC7XXX_MAXSCB )
+ p->flags &= ~AHC_PAGESCBS;
+ }
+
+}
+
+/*+F*************************************************************************
+ * Function:
+ * aic7xxx_register
+ *
+ * Description:
+ * Register a Adaptec aic7xxx chip SCSI controller with the kernel.
+ *-F*************************************************************************/
+static int
+aic7xxx_register(Scsi_Host_Template *template, struct aic7xxx_host *p,
+ int reset_delay)
+{
+ int i, result;
+ int max_targets;
+ int found = 1;
+ unsigned char term, scsi_conf;
+ struct Scsi_Host *host;
+
+ /*
+ * Lock out other contenders for our i/o space.
+ */
+ request_region(p->base, MAXREG - MINREG, "aic7xxx");
+
+
+ host = p->host;
+
+ p->scb_data->maxscbs = AIC7XXX_MAXSCB;
+ host->can_queue = AIC7XXX_MAXSCB;
+ host->cmd_per_lun = 3;
+ host->sg_tablesize = AIC7XXX_MAX_SG;
+ host->select_queue_depths = aic7xxx_select_queue_depth;
+ host->this_id = p->scsi_id;
+ host->io_port = p->base;
+ host->n_io_port = 0xFF;
+ host->base = (unsigned char *) p->mbase;
+ host->irq = p->irq;
+ if (p->features & AHC_WIDE)
+ {
+ host->max_id = 16;
+ }
+ if (p->features & AHC_TWIN)
+ {
+ host->max_channel = 1;
+ }
+
+ p->host = host;
+ p->last_reset = 0;
+ p->host_no = host->host_no;
+ host->unique_id = p->instance;
+ p->isr_count = 0;
+ p->next = NULL;
+ p->completeq.head = NULL;
+ p->completeq.tail = NULL;
+ scbq_init(&p->scb_data->free_scbs);
+ scbq_init(&p->waiting_scbs);
+
+ for (i = 0; i < NUMBER(p->untagged_scbs); i++)
+ {
+ p->untagged_scbs[i] = SCB_LIST_NULL;
+ p->qinfifo[i] = SCB_LIST_NULL;
+ p->qoutfifo[i] = SCB_LIST_NULL;
+ }
+ /*
+ * We currently have no commands of any type
+ */
+ p->qinfifonext = 0;
+ p->qoutfifonext = 0;
+
+ for (i = 0; i < MAX_TARGETS; i++)
+ {
+ p->dev_commands_sent[i] = 0;
+ p->dev_flags[i] = 0;
+ p->dev_active_cmds[i] = 0;
+ p->dev_last_reset[i] = 0;
+ p->dev_last_queue_full[i] = 0;
+ p->dev_last_queue_full_count[i] = 0;
+ p->dev_max_queue_depth[i] = 1;
+ p->dev_temp_queue_depth[i] = 1;
+ p->dev_mid_level_queue_depth[i] = 3;
+ scbq_init(&p->delayed_scbs[i]);
+ init_timer(&p->dev_timer[i]);
+ p->dev_timer[i].expires = 0;
+ p->dev_timer[i].data = (unsigned long)p;
+ p->dev_timer[i].function = (void *)aic7xxx_timer;
+ }
+
+ printk(KERN_INFO "(scsi%d) <%s> found at ", p->host_no,
+ board_names[p->board_name_index]);
+ switch(p->chip)
+ {
+ case (AHC_AIC7770|AHC_EISA):
+ printk("EISA slot %d\n", p->pci_device_fn);
+ break;
+ case (AHC_AIC7770|AHC_VL):
+ printk("VLB slot %d\n", p->pci_device_fn);
+ break;
+ default:
+ printk("PCI %d/%d\n", PCI_SLOT(p->pci_device_fn),
+ PCI_FUNC(p->pci_device_fn));
+ break;
+ }
+ if (p->features & AHC_TWIN)
+ {
+ printk(KERN_INFO "(scsi%d) Twin Channel, A SCSI ID %d, B SCSI ID %d, ",
+ p->host_no, p->scsi_id, p->scsi_id_b);
+ }
+ else
+ {
+ char *channel;
+
+ channel = "";
+
+ if ((p->flags & AHC_MULTI_CHANNEL) != 0)
+ {
+ channel = " A";
+
+ if ( (p->flags & (AHC_CHNLB|AHC_CHNLC)) != 0 )
+ {
+ channel = (p->flags & AHC_CHNLB) ? " B" : " C";
+ }
+ }
+ if (p->features & AHC_WIDE)
+ {
+ printk(KERN_INFO "(scsi%d) Wide ", p->host_no);
+ }
+ else
+ {
+ printk(KERN_INFO "(scsi%d) Narrow ", p->host_no);
+ }
+ printk("Channel%s, SCSI ID=%d, ", channel, p->scsi_id);
+ }
+ aic_outb(p, 0, SEQ_FLAGS);
+
+ /*
+ * Detect SCB parameters and initialize the SCB array.
+ */
+ detect_maxscb(p);
+ printk("%d/%d SCBs\n", p->scb_data->maxhscbs, p->scb_data->maxscbs);
+ if (aic7xxx_verbose & VERBOSE_PROBE2)
+ {
+ printk(KERN_INFO "(scsi%d) BIOS %sabled, IO Port 0x%lx, IRQ %d\n",
+ p->host_no, (p->flags & AHC_BIOS_ENABLED) ? "en" : "dis",
+ p->base, p->irq);
+ printk(KERN_INFO "(scsi%d) IO Memory at 0x%lx, MMAP Memory at 0x%lx\n",
+ p->host_no, p->mbase, (unsigned long)p->maddr);
+ }
+
+#ifdef CONFIG_PCI
+ /*
+ * Now that we know our instance number, we can set the flags we need to
+ * force termination if need be.
+ */
+ if (aic7xxx_stpwlev != -1)
+ {
+ /*
+ * This option only applies to PCI controllers.
+ */
+ if ( (p->chip & ~AHC_CHIPID_MASK) == AHC_PCI)
+ {
+ unsigned char devconfig;
+
+#if LINUX_KERNEL_VERSION > KERNEL_VERSION(2,1,92)
+ pci_read_config_byte(p->pdev, DEVCONFIG, &devconfig);
+#else
+ pcibios_read_config_byte(p->pci_bus, p->pci_device_fn,
+ DEVCONFIG, &devconfig);
+#endif
+ if ( (aic7xxx_stpwlev >> p->instance) & 0x01 )
+ {
+ devconfig |= 0x02;
+ if (aic7xxx_verbose & VERBOSE_PROBE2)
+ printk("(scsi%d) Force setting STPWLEV bit\n", p->host_no);
+ }
+ else
+ {
+ devconfig &= ~0x02;
+ if (aic7xxx_verbose & VERBOSE_PROBE2)
+ printk("(scsi%d) Force clearing STPWLEV bit\n", p->host_no);
+ }
+#if LINUX_KERNEL_VERSION > KERNEL_VERSION(2,1,92)
+ pci_write_config_byte(p->pdev, DEVCONFIG, devconfig);
+#else
+ pcibios_write_config_byte(p->pci_bus, p->pci_device_fn,
+ DEVCONFIG, devconfig);
+#endif
+ }
+ }
+#endif
+
+ /*
+ * That took care of devconfig and stpwlev, now for the actual termination
+ * settings.
+ */
+ if (aic7xxx_override_term != -1)
+ {
+ /*
+ * Again, this only applies to PCI controllers. We don't have problems
+ * with the termination on 274x controllers to the best of my knowledge.
+ */
+ if ( (p->chip & ~AHC_CHIPID_MASK) == AHC_PCI)
+ {
+ unsigned char term_override;
+
+ term_override = ( (aic7xxx_override_term >> (p->instance * 4)) & 0x0f);
+ p->adapter_control &=
+ ~(CFSTERM|CFWSTERM|CFLVDSTERM|CFAUTOTERM|CFSEAUTOTERM);
+ if ( (p->features & AHC_ULTRA2) && (term_override & 0x0c) )
+ {
+ p->adapter_control |= CFLVDSTERM;
+ }
+ if (term_override & 0x02)
+ {
+ p->adapter_control |= CFWSTERM;
+ }
+ if (term_override & 0x01)
+ {
+ p->adapter_control |= CFSTERM;
+ }
+ }
+ }
+
+ if ( (p->flags & AHC_SEEPROM_FOUND) || (aic7xxx_override_term != -1) )
+ {
+ if (p->features & AHC_SPIOCAP)
+ {
+ if ( aic_inb(p, SPIOCAP) & SSPIOCPS )
+ /*
+ * Update the settings in sxfrctl1 to match the termination
+ * settings.
+ */
+ configure_termination(p);
+ }
+ else if ((p->chip & AHC_CHIPID_MASK) >= AHC_AIC7870)
+ {
+ configure_termination(p);
+ }
+ }
+
+ /*
+ * Clear out any possible pending interrupts.
+ */
+ aic7xxx_clear_intstat(p);
+
+ /*
+ * Set the SCSI Id, SXFRCTL0, SXFRCTL1, and SIMODE1, for both channels
+ */
+ if (p->features & AHC_TWIN)
+ {
+ /* Select channel B */
+ aic_outb(p, aic_inb(p, SBLKCTL) | SELBUSB, SBLKCTL);
+
+ term = ((p->flags & AHC_TERM_ENB_B) != 0) ? STPWEN : 0;
+ aic_outb(p, p->scsi_id_b, SCSIID);
+ scsi_conf = aic_inb(p, SCSICONF + 1);
+ aic_outb(p, DFON | SPIOEN, SXFRCTL0);
+ aic_outb(p, (scsi_conf & ENSPCHK) | term |
+ ENSTIMER | ACTNEGEN, SXFRCTL1);
+ aic_outb(p, 0, SIMODE0);
+ aic_outb(p, ENSELTIMO | ENSCSIRST | ENSCSIPERR, SIMODE1);
+ aic_outb(p, 0, SCSIRATE);
+
+ /* Select channel A */
+ aic_outb(p, aic_inb(p, SBLKCTL) & ~SELBUSB, SBLKCTL);
+ }
+
+ term = ((p->flags & AHC_TERM_ENB_SE_LOW) != 0) ? STPWEN : 0;
+ if (p->features & AHC_ULTRA2)
+ aic_outb(p, p->scsi_id, SCSIID_ULTRA2);
+ else
+ aic_outb(p, p->scsi_id, SCSIID);
+ scsi_conf = aic_inb(p, SCSICONF);
+ aic_outb(p, DFON | SPIOEN, SXFRCTL0);
+ aic_outb(p, (scsi_conf & ENSPCHK) | term |
+ ENSTIMER | ACTNEGEN, SXFRCTL1);
+ aic_outb(p, 0, SIMODE0);
+ aic_outb(p, ENSELTIMO | ENSCSIRST | ENSCSIPERR, SIMODE1);
+ aic_outb(p, 0, SCSIRATE);
+ if ( p->features & AHC_ULTRA2)
+ aic_outb(p, 0, SCSIOFFSET);
+
+ /*
+ * Look at the information that board initialization or the board
+ * BIOS has left us. In the lower four bits of each target's
+ * scratch space any value other than 0 indicates that we should
+ * initiate synchronous transfers. If it's zero, the user or the
+ * BIOS has decided to disable synchronous negotiation to that
+ * target so we don't activate the needsdtr flag.
+ */
+ if ((p->features & (AHC_TWIN|AHC_WIDE)) == 0)
+ {
+ max_targets = 8;
+ }
+ else
+ {
+ max_targets = 16;
+ }
+
+ if (!(aic7xxx_no_reset))
+ {
+ /*
+ * If we reset the bus, then clear the transfer settings, else leave
+ * them be
+ */
+ for (i = 0; i < max_targets; i++)
+ {
+ aic_outb(p, 0, TARG_SCSIRATE + i);
+ if (p->features & AHC_ULTRA2)
+ {
+ aic_outb(p, 0, TARG_OFFSET + i);
+ }
+ p->transinfo[i].cur_offset = 0;
+ p->transinfo[i].cur_period = 0;
+ p->transinfo[i].cur_width = MSG_EXT_WDTR_BUS_8_BIT;
+ }
+
+ /*
+ * If we reset the bus, then clear the transfer settings, else leave
+ * them be.
+ */
+ aic_outb(p, 0, ULTRA_ENB);
+ aic_outb(p, 0, ULTRA_ENB + 1);
+ p->ultraenb = 0;
+ }
+
+ /*
+ * Allocate enough hardware scbs to handle the maximum number of
+ * concurrent transactions we can have. We have to make sure that
+ * the allocated memory is contiguous memory. The Linux kmalloc
+ * routine should only allocate contiguous memory, but note that
+ * this could be a problem if kmalloc() is changed.
+ */
+ {
+ size_t array_size;
+ unsigned int hscb_physaddr;
+ unsigned long temp;
+
+ array_size = p->scb_data->maxscbs * sizeof(struct aic7xxx_hwscb);
+ if (p->scb_data->hscbs == NULL)
+ {
+ /*
+ * A little padding so we can align thing the way we want
+ */
+ p->scb_data->hscbs = kmalloc(array_size + 0x1f, GFP_ATOMIC);
+ }
+ if (p->scb_data->hscbs == NULL)
+ {
+ printk("(scsi%d) Unable to allocate hardware SCB array; "
+ "failing detection.\n", p->host_no);
+ p->irq = 0;
+ return(0);
+ }
+ /*
+ * Save the actual kmalloc buffer pointer off, then align our
+ * buffer to a 32 byte boundary
+ */
+ p->scb_data->hscb_kmalloc_ptr = p->scb_data->hscbs;
+ temp = (unsigned long)p->scb_data->hscbs;
+ temp += 0x1f;
+ temp &= ~0x1f;
+ p->scb_data->hscbs = (struct aic7xxx_hwscb *)temp;
+ /* At least the control byte of each SCB needs to be 0. */
+ memset(p->scb_data->hscbs, 0, array_size);
+
+ /* Tell the sequencer where it can find the hardware SCB array. */
+ hscb_physaddr = VIRT_TO_BUS(p->scb_data->hscbs);
+ aic_outb(p, hscb_physaddr & 0xFF, HSCB_ADDR);
+ aic_outb(p, (hscb_physaddr >> 8) & 0xFF, HSCB_ADDR + 1);
+ aic_outb(p, (hscb_physaddr >> 16) & 0xFF, HSCB_ADDR + 2);
+ aic_outb(p, (hscb_physaddr >> 24) & 0xFF, HSCB_ADDR + 3);
+
+ /* Set up the fifo areas at the same time */
+ hscb_physaddr = VIRT_TO_BUS(&p->untagged_scbs[0]);
+ aic_outb(p, hscb_physaddr & 0xFF, SCBID_ADDR);
+ aic_outb(p, (hscb_physaddr >> 8) & 0xFF, SCBID_ADDR + 1);
+ aic_outb(p, (hscb_physaddr >> 16) & 0xFF, SCBID_ADDR + 2);
+ aic_outb(p, (hscb_physaddr >> 24) & 0xFF, SCBID_ADDR + 3);
+ }
+
+ /* The Q-FIFOs we just set up are all empty */
+ aic_outb(p, 0, QINPOS);
+ aic_outb(p, 0, KERNEL_QINPOS);
+ aic_outb(p, 0, QOUTPOS);
+
+ if(p->features & AHC_QUEUE_REGS)
+ {
+ aic_outb(p, SCB_QSIZE_256, QOFF_CTLSTA);
+ aic_outb(p, 0, SDSCB_QOFF);
+ aic_outb(p, 0, SNSCB_QOFF);
+ aic_outb(p, 0, HNSCB_QOFF);
+ }
+
+ /*
+ * We don't have any waiting selections or disconnected SCBs.
+ */
+ aic_outb(p, SCB_LIST_NULL, WAITING_SCBH);
+ aic_outb(p, SCB_LIST_NULL, DISCONNECTED_SCBH);
+
+ /*
+ * Message out buffer starts empty
+ */
+ aic_outb(p, MSG_NOOP, MSG_OUT);
+ aic_outb(p, MSG_NOOP, LAST_MSG);
+
+ /*
+ * Set all the other asundry items that haven't been set yet.
+ * This includes just dumping init values to a lot of registers simply
+ * to make sure they've been touched and are ready for use parity wise
+ * speaking.
+ */
+ aic_outb(p, 0, TMODE_CMDADDR);
+ aic_outb(p, 0, TMODE_CMDADDR + 1);
+ aic_outb(p, 0, TMODE_CMDADDR + 2);
+ aic_outb(p, 0, TMODE_CMDADDR + 3);
+ aic_outb(p, 0, TMODE_CMDADDR_NEXT);
+
+ /*
+ * Link us into the list of valid hosts
+ */
+ p->next = first_aic7xxx;
+ first_aic7xxx = p;
+
+ /*
+ * Clear out any possible pending interrupts, again.
+ */
+ aic7xxx_clear_intstat(p);
+
+ /*
+ * Allocate the first set of scbs for this controller. This is to stream-
+ * line code elsewhere in the driver. If we have to check for the existence
+ * of scbs in certain code sections, it slows things down. However, as
+ * soon as we register the IRQ for this card, we could get an interrupt that
+ * includes possibly the SCSI_RSTI interrupt. If we catch that interrupt
+ * then we are likely to segfault if we don't have at least one chunk of
+ * SCBs allocated or add checks all through the reset code to make sure
+ * that the SCBs have been allocated which is an invalid running condition
+ * and therefore I think it's preferable to simply pre-allocate the first
+ * chunk of SCBs.
+ */
+ aic7xxx_allocate_scb(p);
+
+ /*
+ * Load the sequencer program, then re-enable the board -
+ * resetting the AIC-7770 disables it, leaving the lights
+ * on with nobody home.
+ */
+ aic7xxx_loadseq(p);
+
+ if ( (p->chip & AHC_CHIPID_MASK) == AHC_AIC7770 )
+ {
+ aic_outb(p, ENABLE, BCTL); /* Enable the boards BUS drivers. */
+ }
+
+ if ( !(aic7xxx_no_reset) )
+ {
+ if (p->features & AHC_TWIN)
+ {
+ if (aic7xxx_verbose & VERBOSE_PROBE2)
+ printk(KERN_INFO "(scsi%d) Resetting channel B\n", p->host_no);
+ aic_outb(p, aic_inb(p, SBLKCTL) | SELBUSB, SBLKCTL);
+ aic7xxx_reset_current_bus(p);
+ aic_outb(p, aic_inb(p, SBLKCTL) & ~SELBUSB, SBLKCTL);
+ }
+ /* Reset SCSI bus A. */
+ if (aic7xxx_verbose & VERBOSE_PROBE2)
+ { /* In case we are a 3940, 3985, or 7895, print the right channel */
+ char *channel = "";
+ if (p->flags & AHC_MULTI_CHANNEL)
+ {
+ channel = " A";
+ if (p->flags & (AHC_CHNLB|AHC_CHNLC))
+ channel = (p->flags & AHC_CHNLB) ? " B" : " C";
+ }
+ printk(KERN_INFO "(scsi%d) Resetting channel%s\n", p->host_no, channel);
+ }
+
+ /*
+ * Some of the new Ultra2 chipsets need a longer delay after a chip
+ * reset than just the init setup creates, so we have to delay here
+ * before we go into a reset in order to make the chips happy.
+ */
+ if (p->features & AHC_ULTRA2)
+ mdelay(250);
+ aic7xxx_reset_current_bus(p);
+
+ /*
+ * Delay for the reset delay.
+ */
+ if (!reset_delay)
+ aic7xxx_delay(AIC7XXX_RESET_DELAY);
+ }
+ else
+ {
+ if (!reset_delay)
+ {
+ printk(KERN_INFO "(scsi%d) Not resetting SCSI bus. Note: Don't use "
+ "the no_reset\n", p->host_no);
+ printk(KERN_INFO "(scsi%d) option unless you have a verifiable need "
+ "for it.\n", p->host_no);
+ printk(KERN_INFO "(scsi%d) The no_reset option is known to break some "
+ "systems,\n", p->host_no);
+ printk(KERN_INFO "(scsi%d) and is not supported by the driver author\n",
+ p->host_no);
+ aic7xxx_delay(AIC7XXX_RESET_DELAY);
+ }
+ }
+
+ /*
+ * Register IRQ with the kernel. Only allow sharing IRQs with
+ * PCI devices.
+ */
+ if (!(p->chip & AHC_PCI))
+ {
+ result = (request_irq(p->irq, do_aic7xxx_isr, 0, "aic7xxx", p));
+ }
+ else
+ {
+ result = (request_irq(p->irq, do_aic7xxx_isr, SA_SHIRQ,
+ "aic7xxx", p));
+ if (result < 0)
+ {
+ result = (request_irq(p->irq, do_aic7xxx_isr, SA_INTERRUPT | SA_SHIRQ,
+ "aic7xxx", p));
+ }
+ }
+ if (result < 0)
+ {
+ printk(KERN_WARNING "(scsi%d) Couldn't register IRQ %d, ignoring "
+ "controller.\n", p->host_no, p->irq);
+ p->irq = 0;
+ return (0);
+ }
+
+ unpause_sequencer(p, /* unpause_always */ TRUE);
+
+ return (found);
+}
+
+/*+F*************************************************************************
+ * Function:
+ * aic7xxx_chip_reset
+ *
+ * Description:
+ * Perform a chip reset on the aic7xxx SCSI controller. The controller
+ * is paused upon return.
+ *-F*************************************************************************/
+int
+aic7xxx_chip_reset(struct aic7xxx_host *p)
+{
+ unsigned char sblkctl;
+ int wait;
+
+ /*
+ * For some 274x boards, we must clear the CHIPRST bit and pause
+ * the sequencer. For some reason, this makes the driver work.
+ */
+ aic_outb(p, PAUSE | CHIPRST, HCNTRL);
+
+ /*
+ * In the future, we may call this function as a last resort for
+ * error handling. Let's be nice and not do any unecessary delays.
+ */
+ wait = 1000; /* 1 second (1000 * 1 msec) */
+ while (--wait && !(aic_inb(p, HCNTRL) & CHIPRSTACK))
+ {
+ mdelay(1); /* 1 msec */
+ }
+
+ pause_sequencer(p);
+
+ sblkctl = aic_inb(p, SBLKCTL) & (SELBUSB|SELWIDE);
+ if (p->chip & AHC_PCI)
+ sblkctl &= ~SELBUSB;
+ switch( sblkctl )
+ {
+ case 0: /* normal narrow card */
+ break;
+ case 2: /* Wide card */
+ p->features |= AHC_WIDE;
+ break;
+ case 8: /* Twin card */
+ p->features |= AHC_TWIN;
+ p->flags |= AHC_MULTI_CHANNEL;
+ break;
+ default: /* hmmm...we don't know what this is */
+ printk(KERN_WARNING "aic7xxx: Unsupported adapter type %d, ignoring.\n",
+ aic_inb(p, SBLKCTL) & 0x0a);
+ return(-1);
+ }
+ return(0);
+}
+
+/*+F*************************************************************************
+ * Function:
+ * aic7xxx_alloc
+ *
+ * Description:
+ * Allocate and initialize a host structure. Returns NULL upon error
+ * and a pointer to a aic7xxx_host struct upon success.
+ *-F*************************************************************************/
+static struct aic7xxx_host *
+aic7xxx_alloc(Scsi_Host_Template *sht, struct aic7xxx_host *temp)
+{
+ struct aic7xxx_host *p = NULL;
+ struct Scsi_Host *host;
+ int i;
+
+ /*
+ * Allocate a storage area by registering us with the mid-level
+ * SCSI layer.
+ */
+ host = scsi_register(sht, sizeof(struct aic7xxx_host));
+
+ if (host != NULL)
+ {
+ p = (struct aic7xxx_host *) host->hostdata;
+ memset(p, 0, sizeof(struct aic7xxx_host));
+ *p = *temp;
+ p->host = host;
+
+ p->scb_data = kmalloc(sizeof(scb_data_type), GFP_ATOMIC);
+ if (p->scb_data != NULL)
+ {
+ memset(p->scb_data, 0, sizeof(scb_data_type));
+ scbq_init (&p->scb_data->free_scbs);
+ }
+ else
+ {
+ /*
+ * For some reason we don't have enough memory. Free the
+ * allocated memory for the aic7xxx_host struct, and return NULL.
+ */
+ release_region(p->base, MAXREG - MINREG);
+ scsi_unregister(host);
+ return(NULL);
+ }
+ p->host_no = host->host_no;
+ p->tagenable = 0;
+ p->orderedtag = 0;
+ for (i=0; i<MAX_TARGETS; i++)
+ {
+ p->transinfo[i].goal_period = 0;
+ p->transinfo[i].goal_offset = 0;
+ p->transinfo[i].goal_width = MSG_EXT_WDTR_BUS_8_BIT;
+ }
+ DRIVER_LOCK_INIT
+ }
+ return (p);
+}
+
+/*+F*************************************************************************
+ * Function:
+ * aic7xxx_free
+ *
+ * Description:
+ * Frees and releases all resources associated with an instance of
+ * the driver (struct aic7xxx_host *).
+ *-F*************************************************************************/
+static void
+aic7xxx_free(struct aic7xxx_host *p)
+{
+ int i;
+
+ /*
+ * Free the allocated hardware SCB space.
+ */
+ if (p->scb_data != NULL)
+ {
+ if (p->scb_data->hscbs != NULL)
+ {
+ kfree(p->scb_data->hscb_kmalloc_ptr);
+ p->scb_data->hscbs = p->scb_data->hscb_kmalloc_ptr = NULL;
+ }
+ /*
+ * Free the driver SCBs. These were allocated on an as-need
+ * basis. We allocated these in groups depending on how many
+ * we could fit into a given amount of RAM. The tail SCB for
+ * these allocations has a pointer to the alloced area.
+ */
+ for (i = 0; i < p->scb_data->numscbs; i++)
+ {
+ if (p->scb_data->scb_array[i]->kmalloc_ptr != NULL)
+ kfree(p->scb_data->scb_array[i]->kmalloc_ptr);
+ p->scb_data->scb_array[i] = NULL;
+ }
+
+ /*
+ * Free the SCB data area.
+ */
+ kfree(p->scb_data);
+ }
+
+ /*
+ * Free any alloced Scsi_Cmnd structures that might be around for
+ * negotiation purposes....
+ */
+ for (i = 0; i < MAX_TARGETS; i++)
+ {
+ if(p->dev_wdtr_cmnd[i])
+ kfree(p->dev_wdtr_cmnd[i]);
+ if(p->dev_sdtr_cmnd[i])
+ kfree(p->dev_sdtr_cmnd[i]);
+ }
+
+}
+
+/*+F*************************************************************************
+ * Function:
+ * aic7xxx_load_seeprom
+ *
+ * Description:
+ * Load the seeprom and configure adapter and target settings.
+ * Returns 1 if the load was successful and 0 otherwise.
+ *-F*************************************************************************/
+static void
+aic7xxx_load_seeprom(struct aic7xxx_host *p, unsigned char *sxfrctl1)
+{
+ int have_seeprom = 0;
+ int i, max_targets, mask;
+ unsigned char scsirate, scsi_conf;
+ unsigned short scarray[128];
+ struct seeprom_config *sc = (struct seeprom_config *) scarray;
+
+ if (aic7xxx_verbose & VERBOSE_PROBE2)
+ {
+ printk(KERN_INFO "aic7xxx: Loading serial EEPROM...");
+ }
+ switch (p->chip)
+ {
+ case (AHC_AIC7770|AHC_EISA): /* None of these adapters have seeproms. */
+ if (aic_inb(p, SCSICONF) & TERM_ENB)
+ p->flags |= AHC_TERM_ENB_A;
+ if ( (p->features & AHC_TWIN) && (aic_inb(p, SCSICONF + 1) & TERM_ENB) )
+ p->flags |= AHC_TERM_ENB_B;
+ break;
+
+ case (AHC_AIC7770|AHC_VL):
+ have_seeprom = read_284x_seeprom(p, (struct seeprom_config *) scarray);
+ break;
+
+ default:
+ have_seeprom = read_seeprom(p, (p->flags & (AHC_CHNLB|AHC_CHNLC)),
+ scarray, p->sc_size, p->sc_type);
+ if (!have_seeprom)
+ {
+ if(p->sc_type == C46)
+ have_seeprom = read_seeprom(p, (p->flags & (AHC_CHNLB|AHC_CHNLC)),
+ scarray, p->sc_size, C56_66);
+ else
+ have_seeprom = read_seeprom(p, (p->flags & (AHC_CHNLB|AHC_CHNLC)),
+ scarray, p->sc_size, C46);
+ }
+ break;
+ }
+
+ if (!have_seeprom)
+ {
+ if (aic7xxx_verbose & VERBOSE_PROBE2)
+ {
+ printk("\naic7xxx: No SEEPROM available.\n");
+ }
+ p->flags |= AHC_NEWEEPROM_FMT;
+ if (aic_inb(p, SCSISEQ) == 0)
+ {
+ p->flags |= AHC_USEDEFAULTS;
+ p->flags &= ~AHC_BIOS_ENABLED;
+ p->scsi_id = p->scsi_id_b = 7;
+ *sxfrctl1 |= STPWEN;
+ if (aic7xxx_verbose & VERBOSE_PROBE2)
+ {
+ printk("aic7xxx: Using default values.\n");
+ }
+ }
+ else if (aic7xxx_verbose & VERBOSE_PROBE2)
+ {
+ printk("aic7xxx: Using leftover BIOS values.\n");
+ }
+ if ( *sxfrctl1 & STPWEN )
+ {
+ p->flags |= AHC_TERM_ENB_SE_LOW | AHC_TERM_ENB_SE_HIGH;
+ sc->adapter_control &= ~CFAUTOTERM;
+ sc->adapter_control |= CFSTERM | CFWSTERM | CFLVDSTERM;
+ }
+ p->flags |= AHC_EXTEND_TRANS_A | AHC_EXTEND_TRANS_B;
+ }
+ else
+ {
+ if (aic7xxx_verbose & VERBOSE_PROBE2)
+ {
+ printk("done\n");
+ }
+
+ /*
+ * Note things in our flags
+ */
+ p->flags |= AHC_SEEPROM_FOUND;
+
+ /*
+ * Update the settings in sxfrctl1 to match the termination settings.
+ */
+ *sxfrctl1 = 0;
+
+ /*
+ * Get our SCSI ID from the SEEPROM setting...
+ */
+ p->scsi_id = (sc->brtime_id & CFSCSIID);
+
+ /*
+ * First process the settings that are different between the VLB
+ * and PCI adapter seeproms.
+ */
+ if ((p->chip & AHC_CHIPID_MASK) == AHC_AIC7770)
+ {
+ /* VLB adapter seeproms */
+ if (sc->bios_control & CF284XEXTEND)
+ p->flags |= AHC_EXTEND_TRANS_A;
+
+ if (sc->adapter_control & CF284XSTERM)
+ {
+ *sxfrctl1 |= STPWEN;
+ p->flags |= AHC_TERM_ENB_SE_LOW | AHC_TERM_ENB_SE_HIGH;
+ }
+ }
+ else
+ {
+ /* PCI adapter seeproms */
+ if (sc->bios_control & CFEXTEND)
+ p->flags |= AHC_EXTEND_TRANS_A;
+ if (sc->bios_control & CFBIOSEN)
+ p->flags |= AHC_BIOS_ENABLED;
+ else
+ p->flags &= ~AHC_BIOS_ENABLED;
+
+ if (sc->adapter_control & CFSTERM)
+ {
+ *sxfrctl1 |= STPWEN;
+ p->flags |= AHC_TERM_ENB_SE_LOW | AHC_TERM_ENB_SE_HIGH;
+ }
+ }
+ p->sc = *sc;
+ }
+
+ p->discenable = 0;
+
+ /*
+ * Limit to 16 targets just in case. The 2842 for one is known to
+ * blow the max_targets setting, future cards might also.
+ */
+ max_targets = MIN(sc->max_targets & CFMAXTARG,
+ ((p->features & (AHC_TWIN | AHC_WIDE)) ? 16 : 8));
+
+ if (have_seeprom)
+ {
+ for (i = 0; i < max_targets; i++)
+ {
+ if( ((p->features & AHC_ULTRA) &&
+ !(sc->adapter_control & CFULTRAEN) &&
+ (sc->device_flags[i] & CFSYNCHISULTRA)) ||
+ (sc->device_flags[i] & CFNEWULTRAFORMAT) )
+ {
+ p->flags |= AHC_NEWEEPROM_FMT;
+ break;
+ }
+ }
+ }
+
+ for (i = 0; i < max_targets; i++)
+ {
+ mask = (0x01 << i);
+ if (!have_seeprom)
+ {
+ if(aic_inb(p, SCSISEQ) != 0)
+ {
+ /*
+ * OK...the BIOS set things up and left behind the settings we need.
+ * Just make our sc->device_flags[i] entry match what the card has
+ * set for this device.
+ */
+ p->discenable =
+ ~(aic_inb(p, DISC_DSB) | (aic_inb(p, DISC_DSB + 1) << 8) );
+ p->ultraenb =
+ (aic_inb(p, ULTRA_ENB) | (aic_inb(p, ULTRA_ENB + 1) << 8) );
+ sc->device_flags[i] = (p->discenable & mask) ? CFDISC : 0;
+ if (aic_inb(p, TARG_SCSIRATE + i) & WIDEXFER)
+ sc->device_flags[i] |= CFWIDEB;
+ if (p->features & AHC_ULTRA2)
+ {
+ if (aic_inb(p, TARG_OFFSET + i))
+ {
+ sc->device_flags[i] |= CFSYNCH;
+ sc->device_flags[i] |= (aic_inb(p, TARG_SCSIRATE + i) & 0x07);
+ if ( (aic_inb(p, TARG_SCSIRATE + i) & 0x18) == 0x18 )
+ sc->device_flags[i] |= CFSYNCHISULTRA;
+ }
+ }
+ else
+ {
+ if (aic_inb(p, TARG_SCSIRATE + i) & ~WIDEXFER)
+ {
+ sc->device_flags[i] |= CFSYNCH;
+ if (p->features & AHC_ULTRA)
+ sc->device_flags[i] |= ((p->ultraenb & mask) ?
+ CFSYNCHISULTRA : 0);
+ }
+ }
+ }
+ else
+ {
+ /*
+ * Assume the BIOS has NOT been run on this card and nothing between
+ * the card and the devices is configured yet.
+ */
+ sc->device_flags[i] = CFDISC;
+ if (p->features & AHC_WIDE)
+ sc->device_flags[i] |= CFWIDEB;
+ if (p->features & AHC_ULTRA2)
+ sc->device_flags[i] |= 3;
+ else if (p->features & AHC_ULTRA)
+ sc->device_flags[i] |= CFSYNCHISULTRA;
+ sc->device_flags[i] |= CFSYNCH;
+ aic_outb(p, 0, TARG_SCSIRATE + i);
+ if (p->features & AHC_ULTRA2)
+ aic_outb(p, 0, TARG_OFFSET + i);
+ }
+ }
+ if (sc->device_flags[i] & CFDISC)
+ {
+ p->discenable |= mask;
+ }
+ if (p->flags & AHC_NEWEEPROM_FMT)
+ {
+ if (sc->device_flags[i] & CFSYNCHISULTRA)
+ {
+ p->ultraenb |= mask;
+ }
+ else if (sc->device_flags[i] & CFNEWULTRAFORMAT)
+ {
+ if ( (sc->device_flags[i] & (CFSYNCHISULTRA | CFXFER)) == 0x03 )
+ {
+ sc->device_flags[i] &= ~CFXFER;
+ sc->device_flags[i] |= CFSYNCHISULTRA;
+ p->ultraenb |= mask;
+ }
+ }
+ }
+ else if (sc->adapter_control & CFULTRAEN)
+ {
+ p->ultraenb |= mask;
+ }
+ if ( (sc->device_flags[i] & CFSYNCH) == 0)
+ {
+ sc->device_flags[i] &= ~CFXFER;
+ p->ultraenb &= ~mask;
+ p->transinfo[i].user_offset = 0;
+ p->transinfo[i].user_period = 0;
+ p->transinfo[i].cur_offset = 0;
+ p->transinfo[i].cur_period = 0;
+ p->needsdtr_copy &= ~mask;
+ }
+ else
+ {
+ if (p->features & AHC_ULTRA2)
+ {
+ p->transinfo[i].user_offset = MAX_OFFSET_ULTRA2;
+ p->transinfo[i].cur_offset = aic_inb(p, TARG_OFFSET + i);
+ scsirate = (sc->device_flags[i] & CFXFER) |
+ ((p->ultraenb & mask) ? 0x18 : 0x10);
+ p->transinfo[i].user_period = aic7xxx_find_period(p, scsirate,
+ AHC_SYNCRATE_ULTRA2);
+ p->transinfo[i].cur_period = aic7xxx_find_period(p,
+ aic_inb(p, TARG_SCSIRATE + i),
+ AHC_SYNCRATE_ULTRA2);
+ }
+ else
+ {
+ scsirate = (sc->device_flags[i] & CFXFER) << 4;
+ if (sc->device_flags[i] & CFWIDEB)
+ p->transinfo[i].user_offset = MAX_OFFSET_16BIT;
+ else
+ p->transinfo[i].user_offset = MAX_OFFSET_8BIT;
+ if (p->features & AHC_ULTRA)
+ {
+ short ultraenb;
+ ultraenb = aic_inb(p, ULTRA_ENB) |
+ (aic_inb(p, ULTRA_ENB + 1) << 8);
+ p->transinfo[i].user_period = aic7xxx_find_period(p,
+ scsirate,
+ (p->ultraenb & mask) ?
+ AHC_SYNCRATE_ULTRA :
+ AHC_SYNCRATE_FAST);
+ p->transinfo[i].cur_period = aic7xxx_find_period(p,
+ aic_inb(p, TARG_SCSIRATE + i),
+ (ultraenb & mask) ?
+ AHC_SYNCRATE_ULTRA :
+ AHC_SYNCRATE_FAST);
+ }
+ else
+ p->transinfo[i].user_period = aic7xxx_find_period(p,
+ scsirate, AHC_SYNCRATE_FAST);
+ }
+ p->needsdtr_copy |= mask;
+ }
+ if ( (sc->device_flags[i] & CFWIDEB) && (p->features & AHC_WIDE) )
+ {
+ p->transinfo[i].user_width = MSG_EXT_WDTR_BUS_16_BIT;
+ p->needwdtr_copy |= mask;
+ }
+ else
+ {
+ p->transinfo[i].user_width = MSG_EXT_WDTR_BUS_8_BIT;
+ p->needwdtr_copy &= ~mask;
+ }
+ p->transinfo[i].cur_width =
+ (aic_inb(p, TARG_SCSIRATE + i) & WIDEXFER) ?
+ MSG_EXT_WDTR_BUS_16_BIT : MSG_EXT_WDTR_BUS_8_BIT;
+ }
+ aic_outb(p, ~(p->discenable & 0xFF), DISC_DSB);
+ aic_outb(p, ~((p->discenable >> 8) & 0xFF), DISC_DSB + 1);
+ p->needwdtr = p->needwdtr_copy;
+ p->needsdtr = p->needsdtr_copy;
+ p->wdtr_pending = p->sdtr_pending = 0;
+
+ /*
+ * We set the p->ultraenb from the SEEPROM to begin with, but now we make
+ * it match what is already down in the card. If we are doing a reset
+ * on the card then this will get put back to a default state anyway.
+ * This allows us to not have to pre-emptively negotiate when using the
+ * no_reset option.
+ */
+ if (p->features & AHC_ULTRA)
+ p->ultraenb = aic_inb(p, ULTRA_ENB) | (aic_inb(p, ULTRA_ENB + 1) << 8);
+
+
+ scsi_conf = (p->scsi_id & HSCSIID);
+
+ if(have_seeprom)
+ {
+ p->adapter_control = sc->adapter_control;
+ p->bios_control = sc->bios_control;
+
+ switch (p->chip & AHC_CHIPID_MASK)
+ {
+ case AHC_AIC7895:
+ case AHC_AIC7896:
+ if (p->adapter_control & CFBPRIMARY)
+ p->flags |= AHC_CHANNEL_B_PRIMARY;
+ default:
+ break;
+ }
+
+ if (sc->adapter_control & CFSPARITY)
+ scsi_conf |= ENSPCHK;
+ }
+ else
+ {
+ scsi_conf |= ENSPCHK | RESET_SCSI;
+ }
+
+ /*
+ * Only set the SCSICONF and SCSICONF + 1 registers if we are a PCI card.
+ * The 2842 and 2742 cards already have these registers set and we don't
+ * want to muck with them since we don't set all the bits they do.
+ */
+ if ( (p->chip & ~AHC_CHIPID_MASK) == AHC_PCI )
+ {
+ /* Set the host ID */
+ aic_outb(p, scsi_conf, SCSICONF);
+ /* In case we are a wide card */
+ aic_outb(p, p->scsi_id, SCSICONF + 1);
+ }
+}
+
+/*+F*************************************************************************
+ * Function:
+ * aic7xxx_detect
+ *
+ * Description:
+ * Try to detect and register an Adaptec 7770 or 7870 SCSI controller.
+ *
+ * XXX - This should really be called aic7xxx_probe(). A sequence of
+ * probe(), attach()/detach(), and init() makes more sense than
+ * one do-it-all function. This may be useful when (and if) the
+ * mid-level SCSI code is overhauled.
+ *-F*************************************************************************/
+int
+aic7xxx_detect(Scsi_Host_Template *template)
+{
+ struct aic7xxx_host *temp_p = NULL;
+ struct aic7xxx_host *current_p = NULL;
+ struct aic7xxx_host *list_p = NULL;
+ int found = 0;
+#if defined(__i386__) || defined(__alpha__)
+ ahc_flag_type flags = 0;
+ int type;
+#endif
+ unsigned char sxfrctl1;
+#if defined(__i386__) || defined(__alpha__)
+ unsigned char hcntrl, hostconf;
+ unsigned int slot, base;
+#endif
+
+#ifdef MODULE
+ /*
+ * If we are called as a module, the aic7xxx pointer may not be null
+ * and it would point to our bootup string, just like on the lilo
+ * command line. IF not NULL, then process this config string with
+ * aic7xxx_setup
+ */
+ if(aic7xxx)
+ aic7xxx_setup(aic7xxx, NULL);
+ if(dummy_buffer[0] != 'P')
+ printk(KERN_WARNING "aic7xxx: Please read the file /usr/src/linux/drivers"
+ "/scsi/README.aic7xxx\n"
+ "aic7xxx: to see the proper way to specify options to the aic7xxx "
+ "module\n"
+ "aic7xxx: Specifically, don't use any commas when passing arguments to\n"
+ "aic7xxx: insmod or else it might trash certain memory areas.\n");
+#endif
+
+ template->proc_dir = &proc_scsi_aic7xxx;
+ template->sg_tablesize = AIC7XXX_MAX_SG;
+
+
+#if defined(__i386__) || defined(__alpha__)
+ /*
+ * EISA/VL-bus card signature probe.
+ */
+ slot = MINSLOT;
+ while ( (slot <= MAXSLOT) && !(aic7xxx_no_probe) )
+ {
+ base = SLOTBASE(slot) + MINREG;
+
+ if (check_region(base, MAXREG - MINREG))
+ {
+ /*
+ * Some other driver has staked a
+ * claim to this i/o region already.
+ */
+ slot++;
+ continue; /* back to the beginning of the for loop */
+ }
+ flags = 0;
+ type = aic7xxx_probe(slot, base + AHC_HID0, &flags);
+ if (type == -1)
+ {
+ slot++;
+ continue;
+ }
+ temp_p = kmalloc(sizeof(struct aic7xxx_host), GFP_ATOMIC);
+ if (temp_p == NULL)
+ {
+ printk(KERN_WARNING "aic7xxx: Unable to allocate device space.\n");
+ slot++;
+ continue; /* back to the beginning of the while loop */
+ }
+ /*
+ * Pause the card preserving the IRQ type. Allow the operator
+ * to override the IRQ trigger.
+ */
+ if (aic7xxx_irq_trigger == 1)
+ hcntrl = IRQMS; /* Level */
+ else if (aic7xxx_irq_trigger == 0)
+ hcntrl = 0; /* Edge */
+ else
+ hcntrl = inb(base + HCNTRL) & IRQMS; /* Default */
+ memset(temp_p, 0, sizeof(struct aic7xxx_host));
+ temp_p->unpause = hcntrl | INTEN;
+ temp_p->pause = hcntrl | PAUSE | INTEN;
+ temp_p->base = base;
+ temp_p->mbase = 0;
+ temp_p->maddr = 0;
+ temp_p->pci_bus = 0;
+ temp_p->pci_device_fn = slot;
+ aic_outb(temp_p, hcntrl | PAUSE, HCNTRL);
+ while( (aic_inb(temp_p, HCNTRL) & PAUSE) == 0 ) ;
+ if (aic7xxx_chip_reset(temp_p) == -1)
+ temp_p->irq = 0;
+ else
+ temp_p->irq = aic_inb(temp_p, INTDEF) & 0x0F;
+ temp_p->flags |= AHC_PAGESCBS;
+
+ switch (temp_p->irq)
+ {
+ case 9:
+ case 10:
+ case 11:
+ case 12:
+ case 14:
+ case 15:
+ break;
+
+ default:
+ printk(KERN_WARNING "aic7xxx: Host adapter uses unsupported IRQ "
+ "level %d, ignoring.\n", temp_p->irq);
+ kfree(temp_p);
+ slot++;
+ continue; /* back to the beginning of the while loop */
+ }
+
+ /*
+ * We are commited now, everything has been checked and this card
+ * has been found, now we just set it up
+ */
+
+ /*
+ * Insert our new struct into the list at the end
+ */
+ if (list_p == NULL)
+ {
+ list_p = current_p = temp_p;
+ }
+ else
+ {
+ current_p = list_p;
+ while (current_p->next != NULL)
+ current_p = current_p->next;
+ current_p->next = temp_p;
+ }
+ if (aic7xxx_extended)
+ {
+ temp_p->flags |= AHC_EXTEND_TRANS_A;
+ if (temp_p->flags & AHC_MULTI_CHANNEL)
+ temp_p->flags |= AHC_EXTEND_TRANS_B;
+ }
+
+ switch (type)
+ {
+ case 0:
+ temp_p->board_name_index = 2;
+ if (aic7xxx_verbose & VERBOSE_PROBE2)
+ printk("aic7xxx: <%s> at EISA %d\n",
+ board_names[2], slot);
+ /* FALLTHROUGH */
+ case 1:
+ {
+ temp_p->chip = AHC_AIC7770 | AHC_EISA;
+ temp_p->features |= AHC_AIC7770_FE;
+ temp_p->bios_control = aic_inb(temp_p, HA_274_BIOSCTRL);
+
+ /*
+ * Get the primary channel information. Right now we don't
+ * do anything with this, but someday we will be able to inform
+ * the mid-level SCSI code which channel is primary.
+ */
+ if (temp_p->board_name_index == 0)
+ {
+ temp_p->board_name_index = 3;
+ if (aic7xxx_verbose & VERBOSE_PROBE2)
+ printk("aic7xxx: <%s> at EISA %d\n",
+ board_names[3], slot);
+ }
+ if (temp_p->bios_control & CHANNEL_B_PRIMARY)
+ {
+ temp_p->flags |= AHC_CHANNEL_B_PRIMARY;
+ }
+
+ if ((temp_p->bios_control & BIOSMODE) == BIOSDISABLED)
+ {
+ temp_p->flags &= ~AHC_BIOS_ENABLED;
+ }
+ else
+ {
+ temp_p->flags &= ~AHC_USEDEFAULTS;
+ temp_p->flags |= AHC_BIOS_ENABLED;
+ if ( (temp_p->bios_control & 0x20) == 0 )
+ {
+ temp_p->bios_address = 0xcc000;
+ temp_p->bios_address += (0x4000 * (temp_p->bios_control & 0x07));
+ }
+ else
+ {
+ temp_p->bios_address = 0xd0000;
+ temp_p->bios_address += (0x8000 * (temp_p->bios_control & 0x06));
+ }
+ }
+ temp_p->adapter_control = aic_inb(temp_p, SCSICONF) << 8;
+ temp_p->adapter_control |= aic_inb(temp_p, SCSICONF + 1);
+ if (temp_p->features & AHC_WIDE)
+ {
+ temp_p->scsi_id = temp_p->adapter_control & HWSCSIID;
+ temp_p->scsi_id_b = temp_p->scsi_id;
+ }
+ else
+ {
+ temp_p->scsi_id = (temp_p->adapter_control >> 8) & HSCSIID;
+ temp_p->scsi_id_b = temp_p->adapter_control & HSCSIID;
+ }
+ aic7xxx_load_seeprom(temp_p, &sxfrctl1);
+ break;
+ }
+
+ case 2:
+ case 3:
+ temp_p->chip = AHC_AIC7770 | AHC_VL;
+ temp_p->features |= AHC_AIC7770_FE;
+ if (type == 2)
+ temp_p->flags |= AHC_BIOS_ENABLED;
+ else
+ temp_p->flags &= ~AHC_BIOS_ENABLED;
+ if (aic_inb(temp_p, SCSICONF) & TERM_ENB)
+ sxfrctl1 = STPWEN;
+ aic7xxx_load_seeprom(temp_p, &sxfrctl1);
+ temp_p->board_name_index = 4;
+ if (aic7xxx_verbose & VERBOSE_PROBE2)
+ printk("aic7xxx: <%s> at VLB %d\n",
+ board_names[2], slot);
+ switch( aic_inb(temp_p, STATUS_2840) & BIOS_SEL )
+ {
+ case 0x00:
+ temp_p->bios_address = 0xe0000;
+ break;
+ case 0x20:
+ temp_p->bios_address = 0xc8000;
+ break;
+ case 0x40:
+ temp_p->bios_address = 0xd0000;
+ break;
+ case 0x60:
+ temp_p->bios_address = 0xd8000;
+ break;
+ default:
+ break; /* can't get here */
+ }
+ break;
+
+ default: /* Won't get here. */
+ break;
+ }
+ if (aic7xxx_verbose & VERBOSE_PROBE2)
+ {
+ printk(KERN_INFO "aic7xxx: BIOS %sabled, IO Port 0x%lx, IRQ %d (%s)\n",
+ (temp_p->flags & AHC_USEDEFAULTS) ? "dis" : "en", temp_p->base,
+ temp_p->irq,
+ (temp_p->pause & IRQMS) ? "level sensitive" : "edge triggered");
+ printk(KERN_INFO "aic7xxx: Extended translation %sabled.\n",
+ (temp_p->flags & AHC_EXTEND_TRANS_A) ? "en" : "dis");
+ }
+
+ /*
+ * Set the FIFO threshold and the bus off time.
+ */
+ hostconf = aic_inb(temp_p, HOSTCONF);
+ aic_outb(temp_p, hostconf & DFTHRSH, BUSSPD);
+ aic_outb(temp_p, (hostconf << 2) & BOFF, BUSTIME);
+ slot++;
+ found++;
+ }
+
+#endif /* defined(__i386__) || defined(__alpha__) */
+
+#ifdef CONFIG_PCI
+ /*
+ * PCI-bus probe.
+ */
+#if LINUX_VERSION_CODE > KERNEL_VERSION(2,1,92)
+ if (pci_present())
+#else
+ if (pcibios_present())
+#endif
+ {
+ struct
+ {
+ unsigned short vendor_id;
+ unsigned short device_id;
+ ahc_chip chip;
+ ahc_flag_type flags;
+ ahc_feature features;
+ int board_name_index;
+ unsigned short seeprom_size;
+ unsigned short seeprom_type;
+ } const aic_pdevs[] = {
+ {PCI_VENDOR_ID_ADAPTEC, PCI_DEVICE_ID_ADAPTEC_7810, AHC_NONE,
+ AHC_FNONE, AHC_FENONE, 1,
+ 32, C46 },
+ {PCI_VENDOR_ID_ADAPTEC, PCI_DEVICE_ID_ADAPTEC_7850, AHC_AIC7850,
+ AHC_PAGESCBS, AHC_AIC7850_FE, 5,
+ 32, C46 },
+ {PCI_VENDOR_ID_ADAPTEC, PCI_DEVICE_ID_ADAPTEC_7855, AHC_AIC7850,
+ AHC_PAGESCBS, AHC_AIC7850_FE, 6,
+ 32, C46 },
+ {PCI_VENDOR_ID_ADAPTEC, PCI_DEVICE_ID_ADAPTEC_7860, AHC_AIC7860,
+ AHC_PAGESCBS | AHC_NEWEEPROM_FMT | AHC_BIOS_ENABLED,
+ AHC_AIC7860_FE, 7,
+ 32, C46 },
+ {PCI_VENDOR_ID_ADAPTEC, PCI_DEVICE_ID_ADAPTEC_7861, AHC_AIC7860,
+ AHC_PAGESCBS | AHC_NEWEEPROM_FMT | AHC_BIOS_ENABLED,
+ AHC_AIC7860_FE, 8,
+ 32, C46 },
+ {PCI_VENDOR_ID_ADAPTEC, PCI_DEVICE_ID_ADAPTEC_7870, AHC_AIC7870,
+ AHC_PAGESCBS | AHC_BIOS_ENABLED, AHC_AIC7870_FE, 9,
+ 32, C46 },
+ {PCI_VENDOR_ID_ADAPTEC, PCI_DEVICE_ID_ADAPTEC_7871, AHC_AIC7870,
+ AHC_PAGESCBS | AHC_BIOS_ENABLED, AHC_AIC7870_FE, 10,
+ 32, C46 },
+ {PCI_VENDOR_ID_ADAPTEC, PCI_DEVICE_ID_ADAPTEC_7872, AHC_AIC7870,
+ AHC_PAGESCBS | AHC_BIOS_ENABLED | AHC_MULTI_CHANNEL,
+ AHC_AIC7870_FE, 11,
+ 32, C56_66 },
+ {PCI_VENDOR_ID_ADAPTEC, PCI_DEVICE_ID_ADAPTEC_7873, AHC_AIC7870,
+ AHC_PAGESCBS | AHC_BIOS_ENABLED | AHC_MULTI_CHANNEL,
+ AHC_AIC7870_FE, 12,
+ 32, C56_66 },
+ {PCI_VENDOR_ID_ADAPTEC, PCI_DEVICE_ID_ADAPTEC_7874, AHC_AIC7870,
+ AHC_PAGESCBS | AHC_BIOS_ENABLED, AHC_AIC7870_FE, 13,
+ 32, C46 },
+ {PCI_VENDOR_ID_ADAPTEC, PCI_DEVICE_ID_ADAPTEC_7880, AHC_AIC7880,
+ AHC_PAGESCBS | AHC_BIOS_ENABLED, AHC_AIC7880_FE, 14,
+ 32, C46 },
+ {PCI_VENDOR_ID_ADAPTEC, PCI_DEVICE_ID_ADAPTEC_7881, AHC_AIC7880,
+ AHC_PAGESCBS | AHC_BIOS_ENABLED, AHC_AIC7880_FE, 15,
+ 32, C46 },
+ {PCI_VENDOR_ID_ADAPTEC, PCI_DEVICE_ID_ADAPTEC_7882, AHC_AIC7880,
+ AHC_PAGESCBS | AHC_BIOS_ENABLED | AHC_MULTI_CHANNEL,
+ AHC_AIC7880_FE, 16,
+ 32, C56_66 },
+ {PCI_VENDOR_ID_ADAPTEC, PCI_DEVICE_ID_ADAPTEC_7883, AHC_AIC7880,
+ AHC_PAGESCBS | AHC_BIOS_ENABLED | AHC_MULTI_CHANNEL,
+ AHC_AIC7880_FE, 17,
+ 32, C56_66 },
+ {PCI_VENDOR_ID_ADAPTEC, PCI_DEVICE_ID_ADAPTEC_7884, AHC_AIC7880,
+ AHC_PAGESCBS | AHC_BIOS_ENABLED, AHC_AIC7880_FE, 18,
+ 32, C46 },
+ {PCI_VENDOR_ID_ADAPTEC, PCI_DEVICE_ID_ADAPTEC_7895, AHC_AIC7895,
+ AHC_PAGESCBS | AHC_NEWEEPROM_FMT | AHC_BIOS_ENABLED | AHC_MULTI_CHANNEL,
+ AHC_AIC7895_FE, 19,
+ 32, C56_66 },
+ {PCI_VENDOR_ID_ADAPTEC2, PCI_DEVICE_ID_ADAPTEC2_7890, AHC_AIC7890,
+ AHC_PAGESCBS | AHC_NEWEEPROM_FMT | AHC_BIOS_ENABLED,
+ AHC_AIC7890_FE, 20,
+ 32, C46 },
+ {PCI_VENDOR_ID_ADAPTEC2, PCI_DEVICE_ID_ADAPTEC2_2940U2, AHC_AIC7890,
+ AHC_PAGESCBS | AHC_NEWEEPROM_FMT | AHC_BIOS_ENABLED,
+ AHC_AIC7890_FE, 21,
+ 32, C46 },
+ {PCI_VENDOR_ID_ADAPTEC2, PCI_DEVICE_ID_ADAPTEC2_7896, AHC_AIC7896,
+ AHC_PAGESCBS | AHC_NEWEEPROM_FMT | AHC_BIOS_ENABLED | AHC_MULTI_CHANNEL,
+ AHC_AIC7896_FE, 22,
+ 32, C56_66 },
+ {PCI_VENDOR_ID_ADAPTEC2, PCI_DEVICE_ID_ADAPTEC2_3940U2, AHC_AIC7896,
+ AHC_PAGESCBS | AHC_NEWEEPROM_FMT | AHC_BIOS_ENABLED | AHC_MULTI_CHANNEL,
+ AHC_AIC7896_FE, 23,
+ 32, C56_66 },
+ };
+
+ unsigned short command;
+ unsigned int devconfig, i, oldverbose;
+#ifdef MMAPIO
+ unsigned long page_offset, base;
+#endif
+#if LINUX_VERSION_CODE > KERNEL_VERSION(2,1,92)
+ struct pci_dev *pdev = NULL;
+#else
+ int index;
+ unsigned int piobase, mmapbase;
+ unsigned char pci_bus, pci_devfn, pci_irq;
+#endif
+
+ for (i = 0; i < NUMBER(aic_pdevs); i++)
+ {
+#if LINUX_VERSION_CODE > KERNEL_VERSION(2,1,92)
+ pdev = NULL;
+ while ((pdev = pci_find_device(aic_pdevs[i].vendor_id,
+ aic_pdevs[i].device_id,
+ pdev)))
+#else
+ index = 0;
+ while (!(pcibios_find_device(aic_pdevs[i].vendor_id,
+ aic_pdevs[i].device_id,
+ index++, &pci_bus, &pci_devfn)) )
+#endif
+ {
+ if ( i == 0 ) /* We found one, but it's the 7810 RAID cont. */
+ {
+ if (aic7xxx_verbose & (VERBOSE_PROBE|VERBOSE_PROBE2))
+ {
+ printk(KERN_INFO "aic7xxx: The 7810 RAID controller is not "
+ "supported by\n");
+ printk(KERN_INFO " this driver, we are ignoring it.\n");
+ }
+ }
+ else if ( (temp_p = kmalloc(sizeof(struct aic7xxx_host),
+ GFP_ATOMIC)) != NULL )
+ {
+ memset(temp_p, 0, sizeof(struct aic7xxx_host));
+ temp_p->chip = aic_pdevs[i].chip | AHC_PCI;
+ temp_p->flags = aic_pdevs[i].flags;
+ temp_p->features = aic_pdevs[i].features;
+ temp_p->board_name_index = aic_pdevs[i].board_name_index;
+ temp_p->sc_size = aic_pdevs[i].seeprom_size;
+ temp_p->sc_type = aic_pdevs[i].seeprom_type;
+
+ /*
+ * Read sundry information from PCI BIOS.
+ */
+#if LINUX_VERSION_CODE > KERNEL_VERSION(2,1,92)
+ temp_p->irq = pdev->irq;
+ temp_p->pdev = pdev;
+ temp_p->pci_bus = pdev->bus->number;
+ temp_p->pci_device_fn = pdev->devfn;
+ temp_p->base = pdev->base_address[0];
+ temp_p->mbase = pdev->base_address[1];
+ if (aic7xxx_verbose & VERBOSE_PROBE2)
+ printk("aic7xxx: <%s> at PCI %d/%d\n",
+ board_names[aic_pdevs[i].board_name_index],
+ PCI_SLOT(temp_p->pdev->devfn),
+ PCI_FUNC(temp_p->pdev->devfn));
+ pci_read_config_word(pdev, PCI_COMMAND, &command);
+ if (aic7xxx_verbose & VERBOSE_PROBE2)
+ {
+ printk("aic7xxx: Initial PCI_COMMAND value was 0x%x\n",
+ (int)command);
+ }
+#ifdef AIC7XXX_STRICT_PCI_SETUP
+ command |= PCI_COMMAND_SERR | PCI_COMMAND_PARITY |
+ PCI_COMMAND_INVALIDATE | PCI_COMMAND_MASTER |
+ PCI_COMMAND_MEMORY | PCI_COMMAND_IO;
+#else
+ command |= PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY | PCI_COMMAND_IO;
+#endif
+ if (aic7xxx_pci_parity == 0)
+ command &= ~(PCI_COMMAND_SERR | PCI_COMMAND_PARITY);
+ pci_write_config_word(pdev, PCI_COMMAND, command);
+#ifdef AIC7XXX_STRICT_PCI_SETUP
+ pci_read_config_dword(pdev, DEVCONFIG, &devconfig);
+ if (aic7xxx_verbose & VERBOSE_PROBE2)
+ {
+ printk("aic7xxx: Initial DEVCONFIG value was 0x%x\n", devconfig);
+ }
+ devconfig |= 0x80000000;
+ if ((aic7xxx_pci_parity == 0) || (aic7xxx_pci_parity == -1))
+ {
+ devconfig &= ~(0x00000008);
+ }
+ else
+ {
+ devconfig |= 0x00000008;
+ }
+ pci_write_config_dword(pdev, DEVCONFIG, devconfig);
+#endif /* AIC7XXX_STRICT_PCI_SETUP */
+#else /* LINUX_VERSION_CODE > KERNEL_VERSION(2,1,92) */
+ temp_p->pci_bus = pci_bus;
+ temp_p->pci_device_fn = pci_devfn;
+ if (aic7xxx_verbose & VERBOSE_PROBE2)
+ printk("aic7xxx: <%s> at PCI %d/%d\n",
+ board_names[aic_pdevs[i].board_name_index],
+ PCI_SLOT(temp_p->pci_device_fn),
+ PCI_FUNC(temp_p->pci_device_fn));
+ pcibios_read_config_byte(pci_bus, pci_devfn, PCI_INTERRUPT_LINE,
+ &pci_irq);
+ temp_p->irq = pci_irq;
+ pcibios_read_config_dword(pci_bus, pci_devfn, PCI_BASE_ADDRESS_0,
+ &piobase);
+ temp_p->base = piobase;
+ pcibios_read_config_dword(pci_bus, pci_devfn, PCI_BASE_ADDRESS_1,
+ &mmapbase);
+ temp_p->mbase = mmapbase;
+ pcibios_read_config_word(pci_bus, pci_devfn, PCI_COMMAND, &command);
+ if (aic7xxx_verbose & VERBOSE_PROBE2)
+ {
+ printk("aic7xxx: Initial PCI_COMMAND value was 0x%x\n",
+ (int)command);
+ }
+#ifdef AIC7XXX_STRICT_PCI_SETUP
+ command |= PCI_COMMAND_SERR | PCI_COMMAND_PARITY |
+ PCI_COMMAND_INVALIDATE | PCI_COMMAND_MASTER |
+ PCI_COMMAND_MEMORY | PCI_COMMAND_IO;
+#else
+ command |= PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY | PCI_COMMAND_IO;
+#endif
+ if (aic7xxx_pci_parity == 0)
+ command &= ~(PCI_COMMAND_SERR | PCI_COMMAND_PARITY);
+ pcibios_write_config_word(pci_bus, pci_devfn, PCI_COMMAND, command);
+#ifdef AIC7XXX_STRICT_PCI_SETUP
+ pcibios_read_config_dword(pci_bus, pci_devfn, DEVCONFIG, &devconfig);
+ if (aic7xxx_verbose & VERBOSE_PROBE2)
+ {
+ printk("aic7xxx: Initial DEVCONFIG value was 0x%x\n", devconfig);
+ }
+ devconfig |= 0x80000000;
+ if ((aic7xxx_pci_parity == 0) || (aic7xxx_pci_parity == -1))
+ {
+ devconfig &= ~(0x00000008);
+ }
+ else
+ {
+ devconfig |= 0x00000008;
+ }
+ pcibios_write_config_dword(pci_bus, pci_devfn, DEVCONFIG, devconfig);
+#endif /* AIC7XXX_STRICT_PCI_SETUP */
+#endif /* LINUIX_VERSION_CODE > KERNEL_VERSION(2,1,92) */
+
+ /*
+ * The first bit (LSB) of PCI_BASE_ADDRESS_0 is always set, so
+ * we mask it off.
+ */
+ temp_p->base &= PCI_BASE_ADDRESS_IO_MASK;
+ temp_p->mbase &= PCI_BASE_ADDRESS_MEM_MASK;
+ temp_p->unpause = INTEN;
+ temp_p->pause = temp_p->unpause | PAUSE;
+
+#ifdef MMAPIO
+ base = temp_p->mbase & PAGE_MASK;
+ page_offset = temp_p->mbase - base;
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,1,0)
+ temp_p->maddr = ioremap_nocache(base, page_offset + 256);
+#else
+ temp_p->maddr = vremap(base, page_offset + 256);
+#endif
+ if(temp_p->maddr)
+ {
+ temp_p->maddr += page_offset;
+ }
+#endif
+
+ pause_sequencer(temp_p);
+
+ /*
+ * Clear out any pending PCI error status messages. Also set
+ * verbose to 0 so that we don't emit strange PCI error messages
+ * while cleaning out the current status bits.
+ */
+ oldverbose = aic7xxx_verbose;
+ aic7xxx_verbose = 0;
+ aic7xxx_pci_intr(temp_p);
+ aic7xxx_verbose = oldverbose;
+
+ temp_p->bios_address = 0;
+
+ /*
+ * Remember how the card was setup in case there is no seeprom.
+ */
+ if (temp_p->features & AHC_ULTRA2)
+ temp_p->scsi_id = aic_inb(temp_p, SCSIID_ULTRA2) & OID;
+ else
+ temp_p->scsi_id = aic_inb(temp_p, SCSIID) & OID;
+ /*
+ * Get current termination setting
+ */
+ sxfrctl1 = aic_inb(temp_p, SXFRCTL1) & STPWEN;
+
+ if (aic7xxx_chip_reset(temp_p) == -1)
+ {
+ kfree(temp_p);
+ temp_p = NULL;
+ continue;
+ }
+
+ /*
+ * Doing a switch based upon i is really gross, but since Justin
+ * changed around the chip ID stuff, we can't use that any more.
+ * Since we don't scan the devices the same way as FreeBSD, we end
+ * up doing this gross hack in order to avoid totally splitting
+ * away from Justin's init code in ahc_pci.c
+ */
+ switch (i)
+ {
+ case 7: /* 3940 */
+ case 12: /* 3940-Ultra */
+ switch(PCI_SLOT(temp_p->pci_device_fn))
+ {
+ case 5:
+ temp_p->flags |= AHC_CHNLB;
+ break;
+ default:
+ break;
+ }
+ break;
+
+ case 8: /* 3985 */
+ case 13: /* 3985-Ultra */
+ switch(PCI_SLOT(temp_p->pci_device_fn))
+ {
+ case 8:
+ temp_p->flags |= AHC_CHNLB;
+ break;
+ case 12:
+ temp_p->flags |= AHC_CHNLC;
+ break;
+ default:
+ break;
+ }
+ break;
+
+ case 15:
+ case 18:
+ case 19:
+#if LINUX_VERSION_CODE > KERNEL_VERSION(2,1,92)
+ if (PCI_FUNC(temp_p->pdev->devfn) != 0)
+ {
+ temp_p->flags |= AHC_CHNLB;
+ }
+ /*
+ * The 7895 is the only chipset that sets the SCBSIZE32 param
+ * in the DEVCONFIG register. The Ultra2 chipsets use
+ * the DSCOMMAND0 register instead.
+ */
+ if ((temp_p->chip & AHC_CHIPID_MASK) == AHC_AIC7895)
+ {
+ pci_read_config_dword(pdev, DEVCONFIG, &devconfig);
+ devconfig |= SCBSIZE32;
+ pci_write_config_dword(pdev, DEVCONFIG, devconfig);
+ }
+#else
+ if (PCI_FUNC(temp_p->pci_device_fn) != 0)
+ {
+ temp_p->flags |= AHC_CHNLB;
+ }
+ /*
+ * The 7895 is the only chipset that sets the SCBSIZE32 param
+ * in the DEVCONFIG register. The Ultra2 chipsets use
+ * the DSCOMMAND0 register instead.
+ */
+ if ((temp_p->chip & AHC_CHIPID_MASK) == AHC_AIC7895)
+ {
+ pcibios_read_config_dword(pci_bus, pci_devfn, DEVCONFIG,
+ &devconfig);
+ devconfig |= SCBSIZE32;
+ pcibios_write_config_dword(pci_bus, pci_devfn, DEVCONFIG,
+ devconfig);
+ }
+#endif
+ break;
+ default:
+ break;
+ }
+
+ /*
+ * Loading of the SEEPROM needs to come after we've set the flags
+ * to indicate possible CHNLB and CHNLC assigments. Otherwise,
+ * on 394x and 398x cards we'll end up reading the wrong settings
+ * for channels B and C
+ */
+ switch (temp_p->chip & AHC_CHIPID_MASK)
+ {
+ case AHC_AIC7890:
+ case AHC_AIC7896:
+ aic_outb(temp_p, 0, SCAMCTL);
+ /*
+ * We used to set DPARCKEN in this register, but after talking
+ * to a tech from Adaptec, I found out they don't use that
+ * particular bit in their own register settings, and when you
+ * combine that with the fact that I determined that we were
+ * seeing Data-Path Parity Errors on things we shouldn't see
+ * them on, I think there is a bug in the silicon and the way
+ * to work around it is to disable this particular check. Also
+ * This bug only showed up on certain commands, so it seems to
+ * be pattern related or some such. The commands we would
+ * typically send as a linux TEST_UNIT_READY or INQUIRY command
+ * could cause it to be triggered, while regular commands that
+ * actually made reasonable use of the SG array capabilities
+ * seemed not to cause the problem.
+ */
+ /*
+ aic_outb(temp_p, aic_inb(temp_p, DSCOMMAND0) |
+ CACHETHEN | DPARCKEN | MPARCKEN |
+ USCBSIZE32 | CIOPARCKEN,
+ DSCOMMAND0);
+ */
+ aic_outb(temp_p, (aic_inb(temp_p, DSCOMMAND0) |
+ CACHETHEN | MPARCKEN | USCBSIZE32 |
+ CIOPARCKEN) & ~DPARCKEN, DSCOMMAND0);
+ /* FALLTHROUGH */
+ default:
+ /*
+ * We attempt to read a SEEPROM on *everything*. If we fail,
+ * then we fail, but this covers things like 2910c cards that
+ * now have SEEPROMs with their 7856 chipset that we would
+ * otherwise ignore. They still don't have a BIOS, but they
+ * have a SEEPROM that the SCSISelect utility on the Adaptec
+ * diskettes can configure.
+ */
+ aic7xxx_load_seeprom(temp_p, &sxfrctl1);
+ break;
+ case AHC_AIC7850:
+ case AHC_AIC7860:
+ /*
+ * Set the DSCOMMAND0 register on these cards different from
+ * on the 789x cards. Also, read the SEEPROM as well.
+ */
+ aic_outb(temp_p, (aic_inb(temp_p, DSCOMMAND0) |
+ CACHETHEN | MPARCKEN) & ~DPARCKEN,
+ DSCOMMAND0);
+ aic7xxx_load_seeprom(temp_p, &sxfrctl1);
+ break;
+ case AHC_AIC7880:
+ /*
+ * Only set the DSCOMMAND0 register if this is a Rev B.
+ * chipset. For those, we also enable Ultra mode by
+ * force due to brain-damage on the part of some BIOSes
+ * We overload the devconfig variable here since we can.
+ */
+#if LINUX_VERSION_CODE > KERNEL_VERSION(2,1,92)
+ pci_read_config_dword(pdev, DEVCONFIG, &devconfig);
+#else
+ pcibios_read_config_dword(pci_bus, pci_devfn, DEVCONFIG,
+ &devconfig);
+#endif
+ if ((devconfig & 0xff) >= 1)
+ {
+ aic_outb(temp_p, (aic_inb(temp_p, DSCOMMAND0) |
+ CACHETHEN | MPARCKEN) & ~DPARCKEN,
+ DSCOMMAND0);
+ }
+ aic7xxx_load_seeprom(temp_p, &sxfrctl1);
+ break;
+ }
+
+
+ /*
+ * and then we need another switch based on the type in order to
+ * make sure the channel B primary flag is set properly on 7895
+ * controllers....Arrrgggghhh!!! We also have to catch the fact
+ * that when you disable the BIOS on the 7895 on the Intel DK440LX
+ * motherboard, and possibly others, it only sets the BIOS disabled
+ * bit on the A channel...I think I'm starting to lean towards
+ * going postal....
+ */
+ switch(temp_p->chip & AHC_CHIPID_MASK)
+ {
+ case AHC_AIC7895:
+ case AHC_AIC7896:
+ current_p = list_p;
+ while(current_p != NULL)
+ {
+ if ( (current_p->pci_bus == temp_p->pci_bus) &&
+ (PCI_SLOT(current_p->pci_device_fn) ==
+ PCI_SLOT(temp_p->pci_device_fn)) )
+ {
+ if ( PCI_FUNC(current_p->pci_device_fn) == 0 )
+ {
+ temp_p->flags |=
+ (current_p->flags & AHC_CHANNEL_B_PRIMARY);
+ temp_p->flags &= ~(AHC_BIOS_ENABLED|AHC_USEDEFAULTS);
+ temp_p->flags |=
+ (current_p->flags & (AHC_BIOS_ENABLED|AHC_USEDEFAULTS));
+ }
+ else
+ {
+ current_p->flags |=
+ (temp_p->flags & AHC_CHANNEL_B_PRIMARY);
+ current_p->flags &= ~(AHC_BIOS_ENABLED|AHC_USEDEFAULTS);
+ current_p->flags |=
+ (temp_p->flags & (AHC_BIOS_ENABLED|AHC_USEDEFAULTS));
+ }
+ }
+ current_p = current_p->next;
+ }
+ break;
+ default:
+ break;
+ }
+
+ /*
+ * We do another switch based on i so that we can exclude all
+ * 3895 devices from the next option since the 3895 cards use
+ * shared external SCB RAM while all other cards have dedicated
+ * external SCB RAM per channel. Also exclude the 7850 and
+ * 7860 based stuff since they can have garbage in the bit
+ * that indicates external RAM and get some of this stuff
+ * wrong as a result.
+ */
+ switch(temp_p->chip & AHC_CHIPID_MASK)
+ {
+ default:
+ break;
+ case AHC_AIC7895:
+ case AHC_AIC7896:
+#if LINUX_VERSION_CODE > KERNEL_VERSION(2,1,92)
+ pci_read_config_dword(pdev, DEVCONFIG, &devconfig);
+#else
+ pcibios_read_config_dword(pci_bus, pci_devfn, DEVCONFIG,
+ &devconfig);
+#endif
+ if (temp_p->features & AHC_ULTRA2)
+ {
+ if (aic_inb(temp_p, DSCOMMAND0) & RAMPSM_ULTRA2)
+ {
+ aic_outb(temp_p,
+ aic_inb(temp_p, DSCOMMAND0) & ~SCBRAMSEL_ULTRA2,
+ DSCOMMAND0);
+ temp_p->flags |= AHC_EXTERNAL_SRAM;
+ devconfig |= EXTSCBPEN;
+ }
+ }
+ else if (devconfig & RAMPSM)
+ {
+ devconfig &= ~SCBRAMSEL;
+ devconfig |= EXTSCBPEN;
+ temp_p->flags |= AHC_EXTERNAL_SRAM;
+ }
+#if LINUX_VERSION_CODE > KERNEL_VERSION(2,1,92)
+ pci_write_config_dword(pdev, DEVCONFIG, devconfig);
+#else
+ pcibios_write_config_dword(pci_bus, pci_devfn, DEVCONFIG,
+ devconfig);
+#endif
+ if ( (temp_p->flags & AHC_EXTERNAL_SRAM) &&
+ (temp_p->flags & AHC_CHNLB) )
+ aic_outb(temp_p, 1, CCSCBBADDR);
+ break;
+ }
+
+ /*
+ * Take the LED out of diagnostic mode
+ */
+ aic_outb(temp_p,
+ (aic_inb(temp_p, SBLKCTL) & ~(DIAGLEDEN | DIAGLEDON)),
+ SBLKCTL);
+
+ /*
+ * We don't know where this is set in the SEEPROM or by the
+ * BIOS, so we default to 100%. On Ultra2 controllers, use 75%
+ * instead.
+ */
+ if (temp_p->features & AHC_ULTRA2)
+ {
+ aic_outb(temp_p, RD_DFTHRSH_75 | WR_DFTHRSH_75, DFF_THRSH);
+ }
+ else
+ {
+ aic_outb(temp_p, DFTHRSH_100, DSPCISTATUS);
+ }
+
+ if (aic7xxx_extended)
+ temp_p->flags |= AHC_EXTEND_TRANS_A;
+
+ if ( list_p == NULL )
+ {
+ list_p = current_p = temp_p;
+ }
+ else
+ {
+ current_p = list_p;
+ while(current_p->next != NULL)
+ current_p = current_p->next;
+ current_p->next = temp_p;
+ }
+ temp_p->next = NULL;
+ found++;
+ } /* Found an Adaptec PCI device. */
+ else /* Well, we found one, but we couldn't get any memory */
+ {
+ printk("aic7xxx: Found <%s>\n",
+ board_names[aic_pdevs[i].board_name_index]);
+ printk(KERN_INFO "aic7xxx: Unable to allocate device memory, "
+ "skipping.\n");
+ }
+ } /* while(pdev=....) */
+ } /* for PCI_DEVICES */
+ } /* PCI BIOS present */
+#endif CONFIG_PCI
+ /*
+ * Now, we re-order the probed devices by BIOS address and BUS class.
+ * In general, we follow this algorithm to make the adapters show up
+ * in the same order under linux that the computer finds them.
+ * 1: All VLB/EISA cards with BIOS_ENABLED first, according to BIOS
+ * address, going from lowest to highest.
+ * 2: All PCI controllers with BIOS_ENABLED next, according to BIOS
+ * address, going from lowest to highest.
+ * 3: Remaining VLB/EISA controllers going in slot order.
+ * 4: Remaining PCI controllers, going in PCI device order (reversable)
+ */
+
+ {
+ struct aic7xxx_host *sort_list[4] = { NULL, NULL, NULL, NULL };
+ struct aic7xxx_host *vlb, *pci;
+ struct aic7xxx_host *prev_p;
+ struct aic7xxx_host *p;
+ unsigned char left;
+
+ prev_p = vlb = pci = NULL;
+
+ temp_p = list_p;
+ while (temp_p != NULL)
+ {
+ switch(temp_p->chip & ~AHC_CHIPID_MASK)
+ {
+ case AHC_EISA:
+ case AHC_VL:
+ {
+ p = temp_p;
+ if (p->flags & AHC_BIOS_ENABLED)
+ vlb = sort_list[0];
+ else
+ vlb = sort_list[2];
+
+ if (vlb == NULL)
+ {
+ vlb = temp_p;
+ temp_p = temp_p->next;
+ vlb->next = NULL;
+ }
+ else
+ {
+ current_p = vlb;
+ prev_p = NULL;
+ while ( (current_p != NULL) &&
+ (current_p->bios_address < temp_p->bios_address))
+ {
+ prev_p = current_p;
+ current_p = current_p->next;
+ }
+ if (prev_p != NULL)
+ {
+ prev_p->next = temp_p;
+ temp_p = temp_p->next;
+ prev_p->next->next = current_p;
+ }
+ else
+ {
+ vlb = temp_p;
+ temp_p = temp_p->next;
+ vlb->next = current_p;
+ }
+ }
+
+ if (p->flags & AHC_BIOS_ENABLED)
+ sort_list[0] = vlb;
+ else
+ sort_list[2] = vlb;
+
+ break;
+ }
+ default: /* All PCI controllers fall through to default */
+ {
+
+ p = temp_p;
+ if (p->flags & AHC_BIOS_ENABLED)
+ pci = sort_list[1];
+ else
+ pci = sort_list[3];
+
+ if (pci == NULL)
+ {
+ pci = temp_p;
+ temp_p = temp_p->next;
+ pci->next = NULL;
+ }
+ else
+ {
+ current_p = pci;
+ prev_p = NULL;
+ if (!aic7xxx_reverse_scan)
+ {
+ while ( (current_p != NULL) &&
+ ( (PCI_SLOT(current_p->pci_device_fn) |
+ (current_p->pci_bus << 8)) <
+ (PCI_SLOT(temp_p->pci_device_fn) |
+ (temp_p->pci_bus << 8)) ) )
+ {
+ prev_p = current_p;
+ current_p = current_p->next;
+ }
+ }
+ else
+ {
+ while ( (current_p != NULL) &&
+ ( (PCI_SLOT(current_p->pci_device_fn) |
+ (current_p->pci_bus << 8)) >
+ (PCI_SLOT(temp_p->pci_device_fn) |
+ (temp_p->pci_bus << 8)) ) )
+ {
+ prev_p = current_p;
+ current_p = current_p->next;
+ }
+ }
+ /*
+ * Are we dealing with a 7985 where we need to sort the
+ * channels as well, if so, the bios_address values should
+ * be the same
+ */
+ if ( (current_p) && (temp_p->flags & AHC_MULTI_CHANNEL) &&
+ (temp_p->pci_bus == current_p->pci_bus) &&
+ (PCI_SLOT(temp_p->pci_device_fn) ==
+ PCI_SLOT(current_p->pci_device_fn)) )
+ {
+ if (temp_p->flags & AHC_CHNLB)
+ {
+ if ( !(temp_p->flags & AHC_CHANNEL_B_PRIMARY) )
+ {
+ prev_p = current_p;
+ current_p = current_p->next;
+ }
+ }
+ else
+ {
+ if (temp_p->flags & AHC_CHANNEL_B_PRIMARY)
+ {
+ prev_p = current_p;
+ current_p = current_p->next;
+ }
+ }
+ }
+ if (prev_p != NULL)
+ {
+ prev_p->next = temp_p;
+ temp_p = temp_p->next;
+ prev_p->next->next = current_p;
+ }
+ else
+ {
+ pci = temp_p;
+ temp_p = temp_p->next;
+ pci->next = current_p;
+ }
+ }
+
+ if (p->flags & AHC_BIOS_ENABLED)
+ sort_list[1] = pci;
+ else
+ sort_list[3] = pci;
+
+ break;
+ }
+ } /* End of switch(temp_p->type) */
+ } /* End of while (temp_p != NULL) */
+ /*
+ * At this point, the cards have been broken into 4 sorted lists, now
+ * we run through the lists in order and register each controller
+ */
+ {
+ int i;
+
+ left = found;
+ for (i=0; i<NUMBER(sort_list); i++)
+ {
+ temp_p = sort_list[i];
+ while(temp_p != NULL)
+ {
+ template->name = board_names[temp_p->board_name_index];
+ p = aic7xxx_alloc(template, temp_p);
+ if (p != NULL)
+ {
+ p->instance = found - left;
+ if (aic7xxx_register(template, p, (--left)) == 0)
+ {
+ found--;
+ aic7xxx_release(p->host);
+ scsi_unregister(p->host);
+ }
+ else if (aic7xxx_dump_card)
+ {
+ pause_sequencer(p);
+ aic7xxx_print_card(p);
+ aic7xxx_print_scratch_ram(p);
+ unpause_sequencer(p, TRUE);
+ }
+ }
+ current_p = temp_p;
+ temp_p = (struct aic7xxx_host *)temp_p->next;
+ kfree(current_p);
+ }
+ }
+ }
+ }
+ return (found);
+}
+
+#ifdef AIC7XXX_FAKE_NEGOTIATION_CMDS
+
+/*+F*************************************************************************
+ * Function:
+ * aic7xxx_negotiation_complete
+ *
+ * Description:
+ * Handle completion events for our Negotiation commands. Clear out the
+ * struct and get it ready for its next use.
+ *-F*************************************************************************/
+static void
+aic7xxx_negotiation_complete(Scsi_Cmnd *cmd)
+{
+ return;
+}
+
+/*+F*************************************************************************
+ * Function:
+ * aic7xxx_build_negotiation_command
+ *
+ * Description:
+ * Build a Scsi_Cmnd structure to perform negotiation with or else send
+ * a pre-built command specifically for this purpose.
+ *-F*************************************************************************/
+static void
+aic7xxx_build_negotiation_cmnd(struct aic7xxx_host *p, Scsi_Cmnd *old_cmd,
+ int tindex)
+{
+
+ if ( (p->needwdtr & (1<<tindex)) && !(p->wdtr_pending & (1<<tindex)) )
+ {
+ if(p->dev_wdtr_cmnd[tindex] == NULL)
+ {
+ Scsi_Cmnd *cmd;
+
+ if (!(p->dev_wdtr_cmnd[tindex] = kmalloc(sizeof(Scsi_Cmnd), GFP_ATOMIC)) )
+ {
+ return;
+ }
+ cmd = p->dev_wdtr_cmnd[tindex];
+ memset(cmd, 0, sizeof(Scsi_Cmnd));
+ memcpy(cmd, old_cmd, sizeof(Scsi_Cmnd));
+ memset(&cmd->cmnd[0], 0, sizeof(cmd->cmnd));
+ memset(&cmd->data_cmnd[0], 0, sizeof(cmd->data_cmnd));
+ cmd->lun = 0;
+ cmd->request_bufflen = 0;
+ cmd->request_buffer = NULL;
+ cmd->use_sg = cmd->old_use_sg = cmd->sglist_len = 0;
+ cmd->bufflen = 0;
+ cmd->buffer = NULL;
+ cmd->underflow = 0;
+ cmd->cmd_len = 6;
+ }
+ /*
+ * Before sending this thing out, we also amke the cmd->next pointer
+ * point to the real command so we can stuff any possible SENSE data
+ * intp the real command instead of this fake command. This has to be
+ * done each time the command is built, not just the first time, hence
+ * it's outside of the above if()...
+ */
+ p->dev_wdtr_cmnd[tindex]->next = old_cmd;
+ aic7xxx_queue(p->dev_wdtr_cmnd[tindex],
+ aic7xxx_negotiation_complete);
+ }
+ else if ( (p->needsdtr & (1<<tindex)) && !(p->sdtr_pending & (1<<tindex)) &&
+ !(p->wdtr_pending & (1<<tindex)) )
+ {
+ if(p->dev_sdtr_cmnd[tindex] == NULL)
+ {
+ Scsi_Cmnd *cmd;
+
+ if (!(p->dev_sdtr_cmnd[tindex] = kmalloc(sizeof(Scsi_Cmnd), GFP_ATOMIC)) )
+ {
+ return;
+ }
+ cmd = p->dev_sdtr_cmnd[tindex];
+ memset(cmd, 0, sizeof(Scsi_Cmnd));
+ memcpy(cmd, old_cmd, sizeof(Scsi_Cmnd));
+ memset(&cmd->cmnd[0], 0, sizeof(cmd->cmnd));
+ memset(&cmd->data_cmnd[0], 0, sizeof(cmd->data_cmnd));
+ cmd->lun = 0;
+ cmd->request_bufflen = 0;
+ cmd->request_buffer = NULL;
+ cmd->use_sg = cmd->old_use_sg = cmd->sglist_len = 0;
+ cmd->bufflen = 0;
+ cmd->buffer = NULL;
+ cmd->underflow = 0;
+ cmd->cmd_len = 6;
+ }
+ /*
+ * Before sending this thing out, we also amke the cmd->next pointer
+ * point to the real command so we can stuff any possible SENSE data
+ * intp the real command instead of this fake command. This has to be
+ * done each time the command is built, not just the first time, hence
+ * it's outside of the above if()...
+ */
+ p->dev_sdtr_cmnd[tindex]->next = old_cmd;
+ aic7xxx_queue(p->dev_sdtr_cmnd[tindex],
+ aic7xxx_negotiation_complete);
+ }
+}
+
+#endif
+
+#ifdef AIC7XXX_VERBOSE_DEBUGGING
+/*+F*************************************************************************
+ * Function:
+ * aic7xxx_print_scb
+ *
+ * Description:
+ * Dump the byte codes for an about to be sent SCB.
+ *-F*************************************************************************/
+static void
+aic7xxx_print_scb(struct aic7xxx_host *p, struct aic7xxx_scb *scb)
+{
+ int i;
+ unsigned char *x;
+
+ x = (unsigned char *)&scb->hscb->control;
+
+ for(i=0; i<32; i++)
+ {
+ printk("%02x ", x[i]);
+ }
+ printk("\n");
+}
+#endif
+
+/*+F*************************************************************************
+ * Function:
+ * aic7xxx_buildscb
+ *
+ * Description:
+ * Build a SCB.
+ *-F*************************************************************************/
+static void
+aic7xxx_buildscb(struct aic7xxx_host *p, Scsi_Cmnd *cmd,
+ struct aic7xxx_scb *scb)
+{
+ unsigned short mask;
+ struct aic7xxx_hwscb *hscb;
+
+ mask = (0x01 << TARGET_INDEX(cmd));
+ hscb = scb->hscb;
+
+ /*
+ * Setup the control byte if we need negotiation and have not
+ * already requested it.
+ */
+ hscb->control = 0;
+ scb->tag_action = 0;
+ if (p->discenable & mask)
+ {
+ hscb->control |= DISCENB;
+ if (p->tagenable & mask)
+ {
+ cmd->tag = hscb->tag;
+ p->dev_commands_sent[TARGET_INDEX(cmd)]++;
+ if (p->dev_commands_sent[TARGET_INDEX(cmd)] < 200)
+ {
+ hscb->control |= MSG_SIMPLE_Q_TAG;
+ scb->tag_action = MSG_SIMPLE_Q_TAG;
+ }
+ else
+ {
+ if (p->orderedtag & mask)
+ {
+ hscb->control |= MSG_ORDERED_Q_TAG;
+ scb->tag_action = MSG_ORDERED_Q_TAG;
+ }
+ else
+ {
+ hscb->control |= MSG_SIMPLE_Q_TAG;
+ scb->tag_action = MSG_SIMPLE_Q_TAG;
+ }
+ p->dev_commands_sent[TARGET_INDEX(cmd)] = 0;
+ }
+ }
+ }
+ if (p->dev_flags[TARGET_INDEX(cmd)] & DEVICE_SCANNED)
+ {
+#ifdef AIC7XXX_FAKE_NEGOTIATION_CMDS
+ if ( (p->needwdtr & mask) && !(p->wdtr_pending & mask) )
+ {
+ if (cmd == p->dev_wdtr_cmnd[TARGET_INDEX(cmd)])
+ {
+ p->wdtr_pending |= mask;
+ scb->flags |= SCB_MSGOUT_WDTR;
+ hscb->control &= DISCENB;
+ hscb->control |= MK_MESSAGE;
+ scb->tag_action = 0;
+ }
+ else
+ {
+ aic7xxx_build_negotiation_cmnd(p, cmd, TARGET_INDEX(cmd));
+ }
+ }
+ else if ( (p->needsdtr & mask) && !(p->sdtr_pending & mask) &&
+ !(p->wdtr_pending & mask) )
+ {
+ if (cmd == p->dev_sdtr_cmnd[TARGET_INDEX(cmd)])
+ {
+ p->sdtr_pending |= mask;
+ scb->flags |= SCB_MSGOUT_SDTR;
+ hscb->control &= DISCENB;
+ hscb->control |= MK_MESSAGE;
+ scb->tag_action = 0;
+ }
+ else if (cmd != p->dev_wdtr_cmnd[TARGET_INDEX(cmd)])
+ {
+ aic7xxx_build_negotiation_cmnd(p, cmd, TARGET_INDEX(cmd));
+ }
+ }
+#else
+ if ( (p->needwdtr & mask) && !(p->wdtr_pending & mask) &&
+ !(p->sdtr_pending & mask) && (cmd->lun == 0) )
+ {
+ p->wdtr_pending |= mask;
+ scb->flags |= SCB_MSGOUT_WDTR;
+ hscb->control &= DISCENB;
+ hscb->control |= MK_MESSAGE;
+ scb->tag_action = 0;
+#ifdef AIC7XXX_VERBOSE_DEBUGGING
+ if (aic7xxx_verbose > 0xffff)
+ printk(INFO_LEAD "Building WDTR command.\n", p->host_no,
+ CTL_OF_CMD(cmd));
+#endif
+ }
+ else if ( (p->needsdtr & mask) && !(p->wdtr_pending & mask) &&
+ !(p->sdtr_pending & mask) && (cmd->lun == 0) )
+ {
+ p->sdtr_pending |= mask;
+ scb->flags |= SCB_MSGOUT_SDTR;
+ hscb->control &= DISCENB;
+ hscb->control |= MK_MESSAGE;
+ scb->tag_action = 0;
+#ifdef AIC7XXX_VERBOSE_DEBUGGING
+ if (aic7xxx_verbose > 0xffff)
+ printk(INFO_LEAD "Building SDTR command.\n", p->host_no,
+ CTL_OF_CMD(cmd));
+#endif
+ }
+#endif
+ }
+ hscb->target_channel_lun = ((cmd->target << 4) & 0xF0) |
+ ((cmd->channel & 0x01) << 3) | (cmd->lun & 0x07);
+
+ /*
+ * The interpretation of request_buffer and request_bufflen
+ * changes depending on whether or not use_sg is zero; a
+ * non-zero use_sg indicates the number of elements in the
+ * scatter-gather array.
+ */
+
+ /*
+ * XXX - this relies on the host data being stored in a
+ * little-endian format.
+ */
+ hscb->SCSI_cmd_length = cmd->cmd_len;
+ hscb->SCSI_cmd_pointer = cpu_to_le32(VIRT_TO_BUS(cmd->cmnd));
+
+ if (cmd->use_sg)
+ {
+ struct scatterlist *sg; /* Must be mid-level SCSI code scatterlist */
+
+ /*
+ * We must build an SG list in adapter format, as the kernel's SG list
+ * cannot be used directly because of data field size (__alpha__)
+ * differences and the kernel SG list uses virtual addresses where
+ * we need physical addresses.
+ */
+ int i;
+
+ sg = (struct scatterlist *)cmd->request_buffer;
+ scb->sg_length = 0;
+ /*
+ * Copy the segments into the SG array. NOTE!!! - We used to
+ * have the first entry both in the data_pointer area and the first
+ * SG element. That has changed somewhat. We still have the first
+ * entry in both places, but now we download the address of
+ * scb->sg_list[1] instead of 0 to the sg pointer in the hscb.
+ */
+ for (i = 0; i < cmd->use_sg; i++)
+ {
+ scb->sg_list[i].address = cpu_to_le32(VIRT_TO_BUS(sg[i].address));
+ scb->sg_list[i].length = cpu_to_le32(sg[i].length);
+ scb->sg_length += sg[i].length;
+ }
+ /* Copy the first SG into the data pointer area. */
+ hscb->data_pointer = scb->sg_list[0].address;
+ hscb->data_count = scb->sg_list[0].length;
+ scb->sg_count = cmd->use_sg;
+ hscb->SG_segment_count = cmd->use_sg;
+ hscb->SG_list_pointer = cpu_to_le32(VIRT_TO_BUS(&scb->sg_list[1]));
+
+ }
+ else
+ {
+ if (cmd->request_bufflen)
+ {
+ scb->sg_count = 1;
+ scb->sg_list[0].address = cpu_to_le32(VIRT_TO_BUS(cmd->request_buffer));
+ scb->sg_list[0].length = cpu_to_le32(cmd->request_bufflen);
+ scb->sg_length = cmd->request_bufflen;
+ hscb->SG_segment_count = 1;
+ hscb->SG_list_pointer = cpu_to_le32(VIRT_TO_BUS(&scb->sg_list[0]));
+ hscb->data_count = scb->sg_list[0].length;
+ hscb->data_pointer = scb->sg_list[0].address;
+ }
+ else
+ {
+ scb->sg_count = 0;
+ scb->sg_length = 0;
+ hscb->SG_segment_count = 0;
+ hscb->SG_list_pointer = 0;
+ hscb->data_count = 0;
+ hscb->data_pointer = 0;
+ }
+ }
+#ifdef AIC7XXX_VERBOSE_DEBUGGING
+ if((cmd->cmnd[0] == TEST_UNIT_READY) && (aic7xxx_verbose & VERBOSE_PROBE2))
+ {
+ aic7xxx_print_scb(p, scb);
+ }
+#endif
+}
+
+/*+F*************************************************************************
+ * Function:
+ * aic7xxx_queue
+ *
+ * Description:
+ * Queue a SCB to the controller.
+ *-F*************************************************************************/
+int
+aic7xxx_queue(Scsi_Cmnd *cmd, void (*fn)(Scsi_Cmnd *))
+{
+ struct aic7xxx_host *p;
+ struct aic7xxx_scb *scb;
+#ifdef AIC7XXX_VERBOSE_DEBUGGING
+ int tindex = TARGET_INDEX(cmd);
+#endif
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,1,95)
+ unsigned long cpu_flags = 0;
+#endif
+
+ p = (struct aic7xxx_host *) cmd->host->hostdata;
+ /*
+ * Check to see if channel was scanned.
+ */
+
+#ifdef AIC7XXX_VERBOSE_DEBUGGING
+ if (!(p->flags & AHC_A_SCANNED) && (cmd->channel == 0))
+ {
+ if (aic7xxx_verbose & VERBOSE_PROBE2)
+ printk(INFO_LEAD "Scanning channel for devices.\n",
+ p->host_no, 0, -1, -1);
+ p->flags |= AHC_A_SCANNED;
+ }
+ else
+ {
+ if (!(p->flags & AHC_B_SCANNED) && (cmd->channel == 1))
+ {
+ if (aic7xxx_verbose & VERBOSE_PROBE2)
+ printk(INFO_LEAD "Scanning channel for devices.\n",
+ p->host_no, 1, -1, -1);
+ p->flags |= AHC_B_SCANNED;
+ }
+ }
+
+ if (p->dev_active_cmds[tindex] > (cmd->device->queue_depth + 1))
+ {
+ printk(WARN_LEAD "Commands queued exceeds queue "
+ "depth, active=%d\n",
+ p->host_no, CTL_OF_CMD(cmd),
+ p->dev_active_cmds[tindex]);
+ if ( p->dev_active_cmds[tindex] > 220 )
+ p->dev_active_cmds[tindex] = 0;
+ }
+#endif
+
+ scb = scbq_remove_head(&p->scb_data->free_scbs);
+ if (scb == NULL)
+ {
+ DRIVER_LOCK
+ aic7xxx_allocate_scb(p);
+ DRIVER_UNLOCK
+ scb = scbq_remove_head(&p->scb_data->free_scbs);
+ }
+ if (scb == NULL)
+ {
+ printk(WARN_LEAD "Couldn't get a free SCB.\n", p->host_no,
+ CTL_OF_CMD(cmd));
+ cmd->result = (DID_BUS_BUSY << 16);
+ DRIVER_LOCK
+ aic7xxx_queue_cmd_complete(p, cmd);
+ DRIVER_UNLOCK
+ return 0;
+ }
+ else
+ {
+ scb->cmd = cmd;
+ aic7xxx_position(cmd) = scb->hscb->tag;
+
+ /*
+ * Construct the SCB beforehand, so the sequencer is
+ * paused a minimal amount of time.
+ */
+ aic7xxx_buildscb(p, cmd, scb);
+
+ /*
+ * Make sure the Scsi_Cmnd pointer is saved, the struct it points to
+ * is set up properly, and the parity error flag is reset, then send
+ * the SCB to the sequencer and watch the fun begin.
+ */
+ cmd->scsi_done = fn;
+ cmd->result = DID_OK;
+ memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
+ aic7xxx_error(cmd) = DID_OK;
+ aic7xxx_status(cmd) = 0;
+ cmd->host_scribble = NULL;
+
+ scb->flags |= SCB_ACTIVE | SCB_WAITINGQ;
+
+ DRIVER_LOCK
+ scbq_insert_tail(&p->waiting_scbs, scb);
+ if ( (p->flags & (AHC_IN_ISR | AHC_IN_ABORT | AHC_IN_RESET)) == 0)
+ {
+ aic7xxx_run_waiting_queues(p);
+ }
+ DRIVER_UNLOCK
+ }
+ return (0);
+}
+
+/*+F*************************************************************************
+ * Function:
+ * aic7xxx_bus_device_reset
+ *
+ * Description:
+ * Abort or reset the current SCSI command(s). If the scb has not
+ * previously been aborted, then we attempt to send a BUS_DEVICE_RESET
+ * message to the target. If the scb has previously been unsuccessfully
+ * aborted, then we will reset the channel and have all devices renegotiate.
+ * Returns an enumerated type that indicates the status of the operation.
+ *-F*************************************************************************/
+static int
+aic7xxx_bus_device_reset(struct aic7xxx_host *p, Scsi_Cmnd *cmd)
+{
+ struct aic7xxx_scb *scb;
+ struct aic7xxx_hwscb *hscb;
+ int result = -1;
+ int channel;
+ unsigned char saved_scbptr, lastphase;
+ unsigned char hscb_index;
+ int disconnected;
+
+ scb = (p->scb_data->scb_array[aic7xxx_position(cmd)]);
+ hscb = scb->hscb;
+
+ lastphase = aic_inb(p, LASTPHASE);
+ if (aic7xxx_verbose & VERBOSE_RESET_PROCESS)
+ {
+ printk(INFO_LEAD "Bus Device reset, scb flags 0x%x, ",
+ p->host_no, CTL_OF_SCB(scb), scb->flags);
+ switch (lastphase)
+ {
+ case P_DATAOUT:
+ printk("Data-Out phase\n");
+ break;
+ case P_DATAIN:
+ printk("Data-In phase\n");
+ break;
+ case P_COMMAND:
+ printk("Command phase\n");
+ break;
+ case P_MESGOUT:
+ printk("Message-Out phase\n");
+ break;
+ case P_STATUS:
+ printk("Status phase\n");
+ break;
+ case P_MESGIN:
+ printk("Message-In phase\n");
+ break;
+ default:
+ /*
+ * We're not in a valid phase, so assume we're idle.
+ */
+ printk("while idle, LASTPHASE = 0x%x\n", lastphase);
+ break;
+ }
+ printk(INFO_LEAD "SCSISIGI 0x%x, SEQADDR 0x%x, SSTAT0 0x%x, SSTAT1 "
+ "0x%x\n", p->host_no, CTL_OF_SCB(scb),
+ aic_inb(p, SCSISIGI),
+ aic_inb(p, SEQADDR0) | (aic_inb(p, SEQADDR1) << 8),
+ aic_inb(p, SSTAT0), aic_inb(p, SSTAT1));
+ }
+
+ channel = cmd->channel;
+
+ /*
+ * Send a Device Reset Message:
+ * The target that is holding up the bus may not be the same as
+ * the one that triggered this timeout (different commands have
+ * different timeout lengths). Our strategy here is to queue an
+ * abort message to the timed out target if it is disconnected.
+ * Otherwise, if we have an active target we stuff the message buffer
+ * with an abort message and assert ATN in the hopes that the target
+ * will let go of the bus and go to the mesgout phase. If this
+ * fails, we'll get another timeout a few seconds later which will
+ * attempt a bus reset.
+ */
+ saved_scbptr = aic_inb(p, SCBPTR);
+ disconnected = FALSE;
+
+ if (lastphase != P_BUSFREE)
+ {
+ if (aic_inb(p, SCB_TAG) >= p->scb_data->numscbs)
+ {
+ printk(WARN_LEAD "Invalid SCB ID %d is active, "
+ "SCB flags = 0x%x.\n", p->host_no,
+ CTL_OF_CMD(cmd), scb->hscb->tag, scb->flags);
+ return(SCSI_RESET_ERROR);
+ }
+ if (scb->hscb->tag == aic_inb(p, SCB_TAG))
+ {
+ if ( (lastphase != P_MESGOUT) && (lastphase != P_MESGIN) )
+ {
+ if (aic7xxx_verbose & VERBOSE_RESET_PROCESS)
+ printk(INFO_LEAD "Device reset message in "
+ "message buffer\n", p->host_no, CTL_OF_SCB(scb));
+ scb->flags |= SCB_RESET | SCB_DEVICE_RESET;
+ aic7xxx_error(scb->cmd) = DID_RESET;
+ p->dev_flags[TARGET_INDEX(scb->cmd)] &=
+ ~DEVICE_SUCCESS;
+ p->dev_flags[TARGET_INDEX(scb->cmd)] |=
+ BUS_DEVICE_RESET_PENDING;
+ /* Send the abort message to the active SCB. */
+ aic_outb(p, HOST_MSG, MSG_OUT);
+ aic_outb(p, lastphase | ATNO, SCSISIGO);
+ return(SCSI_RESET_PENDING);
+ }
+ else
+ {
+ /* We want to send out the message, but it could screw an already */
+ /* in place and being used message. Instead, we return an error */
+ /* to try and start the bus reset phase since this command is */
+ /* probably hung (aborts failed, and now reset is failing). We */
+ /* also make sure to set BUS_DEVICE_RESET_PENDING so we won't try */
+ /* any more on this device, but instead will escalate to a bus or */
+ /* host reset (additionally, we won't try to abort any more). */
+ printk(WARN_LEAD "Device reset, Message buffer "
+ "in use\n", p->host_no, CTL_OF_SCB(scb));
+ scb->flags |= SCB_RESET | SCB_DEVICE_RESET;
+ aic7xxx_error(scb->cmd) = DID_RESET;
+ p->dev_flags[TARGET_INDEX(scb->cmd)] &=
+ ~DEVICE_SUCCESS;
+ p->dev_flags[TARGET_INDEX(scb->cmd)] |=
+ BUS_DEVICE_RESET_PENDING;
+ return(SCSI_RESET_ERROR);
+ }
+ }
+ } /* if (last_phase != P_BUSFREE).....indicates we are idle and can work */
+ hscb_index = aic7xxx_find_scb(p, scb);
+ if (hscb_index == SCB_LIST_NULL)
+ {
+ disconnected = (aic7xxx_scb_on_qoutfifo(p, scb)) ? FALSE : TRUE;
+ }
+ else
+ {
+ aic_outb(p, hscb_index, SCBPTR);
+ if (aic_inb(p, SCB_CONTROL) & DISCONNECTED)
+ {
+ disconnected = TRUE;
+ }
+ }
+ if (disconnected)
+ {
+ /*
+ * Simply set the MK_MESSAGE flag and the SEQINT handler will do
+ * the rest on a reconnect.
+ */
+ scb->hscb->control |= MK_MESSAGE;
+ scb->flags |= SCB_RESET | SCB_DEVICE_RESET;
+ p->dev_flags[TARGET_INDEX(scb->cmd)] &= ~DEVICE_SUCCESS;
+ p->dev_flags[TARGET_INDEX(scb->cmd)] |=
+ BUS_DEVICE_RESET_PENDING;
+ if (hscb_index != SCB_LIST_NULL)
+ {
+ unsigned char scb_control;
+
+ aic_outb(p, hscb_index, SCBPTR);
+ scb_control = aic_inb(p, SCB_CONTROL);
+ aic_outb(p, scb_control | MK_MESSAGE, SCB_CONTROL);
+ }
+ /*
+ * Actually requeue this SCB in case we can select the
+ * device before it reconnects. If the transaction we
+ * want to abort is not tagged, then this will be the only
+ * outstanding command and we can simply shove it on the
+ * qoutfifo and be done. If it is tagged, then it goes right
+ * in with all the others, no problem :) We need to add it
+ * to the qinfifo and let the sequencer know it is there.
+ * Now, the only problem left to deal with is, *IF* this
+ * command completes, in spite of the MK_MESSAGE bit in the
+ * control byte, then we need to pick that up in the interrupt
+ * routine and clean things up. This *shouldn't* ever happen.
+ */
+ if (aic7xxx_verbose & VERBOSE_RESET_PROCESS)
+ printk(INFO_LEAD "Queueing device reset "
+ "command.\n", p->host_no, CTL_OF_SCB(scb));
+ p->qinfifo[p->qinfifonext++] = scb->hscb->tag;
+ if (p->features & AHC_QUEUE_REGS)
+ aic_outb(p, p->qinfifonext, HNSCB_QOFF);
+ else
+ aic_outb(p, p->qinfifonext, KERNEL_QINPOS);
+ scb->flags |= SCB_QUEUED_ABORT;
+ result = SCSI_RESET_PENDING;
+ }
+ else if (result == -1)
+ {
+ result = SCSI_RESET_ERROR;
+ }
+ aic_outb(p, saved_scbptr, SCBPTR);
+ return (result);
+}
+
+
+/*+F*************************************************************************
+ * Function:
+ * aic7xxx_panic_abort
+ *
+ * Description:
+ * Abort the current SCSI command(s).
+ *-F*************************************************************************/
+void
+aic7xxx_panic_abort(struct aic7xxx_host *p, Scsi_Cmnd *cmd)
+{
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,1,0)
+ int i, mask, found, need_tag;
+ struct aic7xxx_scb *scb;
+ unsigned char qinpos, hscbp;
+
+ found = FALSE;
+#endif
+
+ printk("aic7xxx driver version %s/%s\n", AIC7XXX_C_VERSION,
+ UTS_RELEASE);
+ printk("Controller type:\n %s\n", board_names[p->board_name_index]);
+ printk("p->flags=0x%x, p->chip=0x%x, p->features=0x%x, "
+ "sequencer %s paused\n",
+ p->flags, p->chip, p->features,
+ (aic_inb(p, HCNTRL) & PAUSE) ? "is" : "isn't" );
+ pause_sequencer(p);
+ disable_irq(p->irq);
+ aic7xxx_print_card(p);
+ aic7xxx_print_scratch_ram(p);
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,1,0)
+ for(i=0; i<MAX_TARGETS; i++)
+ {
+ if(p->dev_flags[i] & DEVICE_PRESENT)
+ {
+ mask = (0x01 << i);
+ printk(INFO_LEAD "dev_flags=0x%x, WDTR:%c/%c/%c, SDTR:%c/%c/%c,"
+ " q_depth=%d:%d:%d\n",
+ p->host_no, 0, i, 0, p->dev_flags[i],
+ (p->wdtr_pending & mask) ? 'Y' : 'N',
+ (p->needwdtr & mask) ? 'Y' : 'N',
+ (p->needwdtr_copy & mask) ? 'Y' : 'N',
+ (p->sdtr_pending & mask) ? 'Y' : 'N',
+ (p->needsdtr & mask) ? 'Y' : 'N',
+ (p->needsdtr_copy & mask) ? 'Y' : 'N',
+ p->dev_active_cmds[i],
+ p->dev_max_queue_depth[i], p->dev_mid_level_queue_depth[i]);
+ printk(INFO_LEAD "targ_scsirate=0x%x", p->host_no, 0, i, 0,
+ aic_inb(p, TARG_SCSIRATE + i));
+ if (p->features & AHC_ULTRA2)
+ printk(", targ_offset=%d", aic_inb(p, TARG_OFFSET + i));
+ printk("\n");
+ }
+ }
+ /*
+ * Search for this command and see if we can't track it down, it's the
+ * one causing the timeout. Print out this command first, then all other
+ * active commands afterwords.
+ */
+ need_tag = -1;
+ if ( cmd )
+ {
+ scb = p->scb_data->scb_array[aic7xxx_position(cmd)];
+ if ( (scb->flags & SCB_ACTIVE) && (scb->cmd == cmd) )
+ {
+ printk("Timed out command is scb #%d:\n", scb->hscb->tag);
+ printk("Tag%d: flags=0x%x, control=0x%x, TCL=0x%x, %s\n", scb->hscb->tag,
+ scb->flags, scb->hscb->control, scb->hscb->target_channel_lun,
+ (scb->flags & SCB_WAITINGQ) ? "WAITINGQ" : "Sent" );
+ need_tag = scb->hscb->tag;
+ if (scb->flags & SCB_WAITINGQ) found=TRUE;
+ }
+ }
+ printk("QINFIFO: (TAG) ");
+ qinpos = aic_inb(p, QINPOS);
+ while ( qinpos != p->qinfifonext )
+ {
+ if (p->qinfifo[qinpos] == need_tag)
+ found=TRUE;
+ printk("%d ", p->qinfifo[qinpos++]);
+ }
+ printk("\n");
+ printk("Current SCB: (SCBPTR/TAG/CONTROL) %d/%d/0x%x\n", aic_inb(p, SCBPTR),
+ aic_inb(p, SCB_TAG), aic_inb(p, SCB_CONTROL) );
+ if (aic_inb(p, SCB_TAG) == need_tag) found=TRUE;
+ printk("WAITING_SCBS: (SCBPTR/TAG/CONTROL) %d->",
+ hscbp = aic_inb(p, WAITING_SCBH));
+ while (hscbp != SCB_LIST_NULL)
+ {
+ aic_outb(p, hscbp, SCBPTR);
+ printk("%d/%d/0x%x ", hscbp, aic_inb(p, SCB_TAG), aic_inb(p, SCB_CONTROL));
+ hscbp = aic_inb(p, SCB_NEXT);
+ if (aic_inb(p, SCB_TAG) == need_tag) found=TRUE;
+ }
+ printk("\n");
+ printk("DISCONNECTED_SCBS: (SCBPTR/TAG/CONTROL) %d->",
+ hscbp = aic_inb(p, DISCONNECTED_SCBH));
+ while (hscbp != SCB_LIST_NULL)
+ {
+ aic_outb(p, hscbp, SCBPTR);
+ printk("%d/%d/0x%x ", hscbp, aic_inb(p, SCB_TAG), aic_inb(p, SCB_CONTROL));
+ hscbp = aic_inb(p, SCB_NEXT);
+ if (aic_inb(p, SCB_TAG) == need_tag) found=TRUE;
+ }
+ printk("\n");
+ printk("FREE_SCBS: (SCBPTR/TAG/CONTROL) %d->",
+ hscbp = aic_inb(p, FREE_SCBH));
+ while (hscbp != SCB_LIST_NULL)
+ {
+ aic_outb(p, hscbp, SCBPTR);
+ printk("%d/%d/0x%x ", hscbp, aic_inb(p, SCB_TAG), aic_inb(p, SCB_CONTROL));
+ hscbp = aic_inb(p, SCB_NEXT);
+ }
+ printk("\n");
+
+ if (found == FALSE)
+ {
+ /*
+ * We haven't found the offending SCB yet, and it should be around
+ * somewhere, so go look for it in the cards SCBs.
+ */
+ printk("SCBPTR CONTROL TAG PREV NEXT\n");
+ for(i=0; i<p->scb_data->maxhscbs; i++)
+ {
+ aic_outb(p, i, SCBPTR);
+ printk(" %3d %02x %02x %02x %02x\n", i,
+ aic_inb(p, SCB_CONTROL), aic_inb(p, SCB_TAG),
+ aic_inb(p, SCB_PREV), aic_inb(p, SCB_NEXT));
+ }
+ }
+
+
+ for (i=0; i < p->scb_data->numscbs; i++)
+ {
+ scb = p->scb_data->scb_array[i];
+ if ( (scb->flags & SCB_ACTIVE) && (scb->cmd != cmd) )
+ {
+ printk("Tag%d: flags=0x%x, control=0x%x, TCL=0x%x, %s\n", scb->hscb->tag,
+ scb->flags, scb->hscb->control, scb->hscb->target_channel_lun,
+ (scb->flags & SCB_WAITINGQ) ? "WAITINGQ" : "Sent" );
+ }
+ }
+#endif
+ sti();
+ for(;;) barrier();
+}
+
+/*+F*************************************************************************
+ * Function:
+ * aic7xxx_abort
+ *
+ * Description:
+ * Abort the current SCSI command(s).
+ *-F*************************************************************************/
+int
+aic7xxx_abort(Scsi_Cmnd *cmd)
+{
+ struct aic7xxx_scb *scb = NULL;
+ struct aic7xxx_host *p;
+ int result, found=0;
+ unsigned char tmp_char, saved_hscbptr, next_hscbptr, prev_hscbptr;
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,1,95)
+ unsigned long cpu_flags = 0;
+#endif
+ Scsi_Cmnd *cmd_next, *cmd_prev;
+
+ p = (struct aic7xxx_host *) cmd->host->hostdata;
+ scb = (p->scb_data->scb_array[aic7xxx_position(cmd)]);
+
+ /*
+ * I added a new config option to the driver: "panic_on_abort" that will
+ * cause the driver to panic and the machine to stop on the first abort
+ * or reset call into the driver. At that point, it prints out a lot of
+ * usefull information for me which I can then use to try and debug the
+ * problem. Simply enable the boot time prompt in order to activate this
+ * code.
+ */
+ if (aic7xxx_panic_on_abort)
+ aic7xxx_panic_abort(p, cmd);
+
+ DRIVER_LOCK
+
+/*
+ * Run the isr to grab any command in the QOUTFIFO and any other misc.
+ * assundry tasks. This should also set up the bh handler if there is
+ * anything to be done, but it won't run until we are done here since
+ * we are following a straight code path without entering the scheduler
+ * code.
+ */
+
+ pause_sequencer(p);
+ while ( (aic_inb(p, INTSTAT) & INT_PEND) && !(p->flags & AHC_IN_ISR))
+ {
+ aic7xxx_isr(p->irq, p, (void *)NULL);
+ pause_sequencer(p);
+ aic7xxx_done_cmds_complete(p);
+ }
+
+ if ((scb == NULL) || (cmd->serial_number != cmd->serial_number_at_timeout))
+ /* Totally bogus cmd since it points beyond our */
+ { /* valid SCB range or doesn't even match it's own*/
+ /* timeout serial number. */
+ if (aic7xxx_verbose & VERBOSE_ABORT_MID)
+ printk(INFO_LEAD "Abort called with bogus Scsi_Cmnd "
+ "pointer.\n", p->host_no, CTL_OF_CMD(cmd));
+ unpause_sequencer(p, FALSE);
+ DRIVER_UNLOCK
+ return(SCSI_ABORT_NOT_RUNNING);
+ }
+ if (scb->cmd != cmd) /* Hmmm...either this SCB is currently free with a */
+ { /* NULL cmd pointer (NULLed out when freed) or it */
+ /* has already been recycled for another command */
+ /* Either way, this SCB has nothing to do with this*/
+ /* command and we need to deal with cmd without */
+ /* touching the SCB. */
+ /* The theory here is to return a value that will */
+ /* make the queued for complete command actually */
+ /* finish successfully, or to indicate that we */
+ /* don't have this cmd any more and the mid level */
+ /* code needs to find it. */
+ cmd_next = p->completeq.head;
+ cmd_prev = NULL;
+ while (cmd_next != NULL)
+ {
+ if (cmd_next == cmd)
+ {
+ if (aic7xxx_verbose & VERBOSE_ABORT_PROCESS)
+ printk(INFO_LEAD "Abort called for command "
+ "on completeq, completing.\n", p->host_no, CTL_OF_CMD(cmd));
+ if ( cmd_prev == NULL )
+ p->completeq.head = (Scsi_Cmnd *)cmd_next->host_scribble;
+ else
+ cmd_prev->host_scribble = cmd_next->host_scribble;
+ cmd_next->scsi_done(cmd_next);
+ unpause_sequencer(p, FALSE);
+ DRIVER_UNLOCK
+ return(SCSI_ABORT_NOT_RUNNING); /* It's already back as a successful
+ * completion */
+ }
+ cmd_prev = cmd_next;
+ cmd_next = (Scsi_Cmnd *)cmd_next->host_scribble;
+ }
+ if (aic7xxx_verbose & VERBOSE_ABORT_MID)
+ printk(INFO_LEAD "Abort called for already completed"
+ " command.\n", p->host_no, CTL_OF_CMD(cmd));
+ unpause_sequencer(p, FALSE);
+ DRIVER_UNLOCK
+ return(SCSI_ABORT_NOT_RUNNING);
+ }
+
+/* At this point we know the following:
+ * the SCB pointer is valid
+ * the command pointer passed in to us and the scb->cmd pointer match
+ * this then means that the command we need to abort is the same as the
+ * command held by the scb pointer and is a valid abort request.
+ * Now, we just have to figure out what to do from here. Current plan is:
+ * if we have already been here on this command, escalate to a reset
+ * if scb is on waiting list or QINFIFO, send it back as aborted, but
+ * we also need to be aware of the possibility that we could be using
+ * a faked negotiation command that is holding this command up, if
+ * so we need to take care of that command instead, which means we
+ * would then treat this one like it was sitting around disconnected
+ * instead.
+ * if scb is on WAITING_SCB list in sequencer, free scb and send back
+ * if scb is disconnected and not completed, abort with abort message
+ * if scb is currently running, then it may be causing the bus to hang
+ * so we want a return value that indicates a reset would be appropriate
+ * if the command does not finish shortly
+ * if scb is already complete but not on completeq, we're screwed because
+ * this can't happen (except if the command is in the QOUTFIFO, in which
+ * case we would like it to complete successfully instead of having to
+ * to be re-done)
+ * All other scenarios already dealt with by previous code.
+ */
+
+ if ( scb->flags & (SCB_ABORT | SCB_RESET | SCB_QUEUED_ABORT) )
+ {
+ if (aic7xxx_verbose & VERBOSE_ABORT_PROCESS)
+ printk(INFO_LEAD "SCB aborted once already, "
+ "escalating.\n", p->host_no, CTL_OF_SCB(scb));
+ unpause_sequencer(p, FALSE);
+ DRIVER_UNLOCK
+ return(SCSI_ABORT_SNOOZE);
+ }
+ if ( (p->flags & (AHC_RESET_PENDING | AHC_ABORT_PENDING)) ||
+ (p->dev_flags[TARGET_INDEX(scb->cmd)] &
+ BUS_DEVICE_RESET_PENDING) )
+ {
+ if (aic7xxx_verbose & VERBOSE_ABORT_PROCESS)
+ printk(INFO_LEAD "Reset/Abort pending for this "
+ "device, not wasting our time.\n", p->host_no, CTL_OF_SCB(scb));
+ unpause_sequencer(p, FALSE);
+ DRIVER_UNLOCK
+ return(SCSI_ABORT_PENDING);
+ }
+
+ found = 0;
+ p->flags |= AHC_IN_ABORT;
+ if (aic7xxx_verbose & VERBOSE_ABORT)
+ printk(INFO_LEAD "Aborting scb %d, flags 0x%x\n",
+ p->host_no, CTL_OF_SCB(scb), scb->hscb->tag, scb->flags);
+
+/*
+ * First, let's check to see if the currently running command is our target
+ * since if it is, the return is fairly easy and quick since we don't want
+ * to touch the command in case it might complete, but we do want a timeout
+ * in case it's actually hung, so we really do nothing, but tell the mid
+ * level code to reset the timeout.
+ */
+
+ if ( scb->hscb->tag == aic_inb(p, SCB_TAG) )
+ {
+ /*
+ * Check to see if the sequencer is just sitting on this command, or
+ * if it's actively being run.
+ */
+ result = aic_inb(p, LASTPHASE);
+ switch (result)
+ {
+ case P_DATAOUT: /* For any of these cases, we can assume we are */
+ case P_DATAIN: /* an active command and act according. For */
+ case P_COMMAND: /* anything else we are going to fall on through*/
+ case P_STATUS: /* The SCSI_ABORT_SNOOZE will give us two abort */
+ case P_MESGOUT: /* chances to finish and then escalate to a */
+ case P_MESGIN: /* reset call */
+ if (aic7xxx_verbose & VERBOSE_ABORT_PROCESS)
+ printk(INFO_LEAD "SCB is currently active. "
+ "Waiting on completion.\n", p->host_no, CTL_OF_SCB(scb));
+ unpause_sequencer(p, FALSE);
+ p->flags &= ~AHC_IN_ABORT;
+ scb->flags |= SCB_RECOVERY_SCB; /* Note the fact that we've been */
+ p->flags |= AHC_ABORT_PENDING; /* here so we will know not to */
+ DRIVER_UNLOCK /* muck with other SCBs if this */
+ return(SCSI_ABORT_PENDING); /* one doesn't complete and clear */
+ break; /* out. */
+ default:
+ break;
+ }
+ }
+
+ if ((found == 0) && (scb->flags & SCB_WAITINGQ))
+ {
+ int tindex = TARGET_INDEX(cmd);
+#ifdef AIC7XXX_FAKE_NEGOTIATION_CMDS
+ unsigned short mask;
+
+ mask = (1 << tindex);
+
+ if (p->wdtr_pending & mask)
+ {
+ if (p->dev_wdtr_cmnd[tindex]->next != cmd)
+ found = 1;
+ else
+ found = 0;
+ }
+ else if (p->sdtr_pending & mask)
+ {
+ if (p->dev_sdtr_cmnd[tindex]->next != cmd)
+ found = 1;
+ else
+ found = 0;
+ }
+ else
+ {
+ found = 1;
+ }
+ if (found == 0)
+ {
+ /*
+ * OK..this means the command we are currently getting an abort
+ * for has an outstanding negotiation command in front of it.
+ * We don't really have a way to tie back into the negotiation
+ * commands, so we just send this back as pending, then it
+ * will get reset in 2 seconds.
+ */
+ unpause_sequencer(p, TRUE);
+ scb->flags |= SCB_ABORT;
+ DRIVER_UNLOCK
+ return(SCSI_ABORT_PENDING);
+ }
+#endif
+ if (aic7xxx_verbose & VERBOSE_ABORT_PROCESS)
+ printk(INFO_LEAD "SCB found on waiting list and "
+ "aborted.\n", p->host_no, CTL_OF_SCB(scb));
+ scbq_remove(&p->waiting_scbs, scb);
+ scbq_remove(&p->delayed_scbs[tindex], scb);
+ p->dev_active_cmds[tindex]++;
+ p->activescbs++;
+ scb->flags &= ~(SCB_WAITINGQ | SCB_ACTIVE);
+ scb->flags |= SCB_ABORT | SCB_QUEUED_FOR_DONE;
+ found = 1;
+ }
+
+/*
+ * We just checked the waiting_q, now for the QINFIFO
+ */
+ if ( found == 0 )
+ {
+ if ( ((found = aic7xxx_search_qinfifo(p, cmd->target,
+ cmd->channel,
+ cmd->lun, scb->hscb->tag, SCB_ABORT | SCB_QUEUED_FOR_DONE,
+ FALSE, NULL)) != 0) &&
+ (aic7xxx_verbose & VERBOSE_ABORT_PROCESS))
+ printk(INFO_LEAD "SCB found in QINFIFO and "
+ "aborted.\n", p->host_no, CTL_OF_SCB(scb));
+ }
+
+/*
+ * QINFIFO, waitingq, completeq done. Next, check WAITING_SCB list in card
+ */
+
+ if ( found == 0 )
+ {
+ unsigned char scb_next_ptr;
+ prev_hscbptr = SCB_LIST_NULL;
+ saved_hscbptr = aic_inb(p, SCBPTR);
+ next_hscbptr = aic_inb(p, WAITING_SCBH);
+ while ( next_hscbptr != SCB_LIST_NULL )
+ {
+ aic_outb(p, next_hscbptr, SCBPTR );
+ if ( scb->hscb->tag == aic_inb(p, SCB_TAG) )
+ {
+ found = 1;
+ if (aic7xxx_verbose & VERBOSE_ABORT_PROCESS)
+ printk(INFO_LEAD "SCB found on hardware waiting"
+ " list and aborted.\n", p->host_no, CTL_OF_SCB(scb));
+ if ( prev_hscbptr == SCB_LIST_NULL )
+ {
+ aic_outb(p, aic_inb(p, SCB_NEXT), WAITING_SCBH);
+ /* stop the selection since we just
+ * grabbed the scb out from under the
+ * card
+ */
+ aic_outb(p, aic_inb(p, SCSISEQ) & ~ENSELO, SCSISEQ);
+ aic_outb(p, CLRSELTIMEO, CLRSINT1);
+ }
+ else
+ {
+ scb_next_ptr = aic_inb(p, SCB_NEXT);
+ aic_outb(p, prev_hscbptr, SCBPTR);
+ aic_outb(p, scb_next_ptr, SCB_NEXT);
+ aic_outb(p, next_hscbptr, SCBPTR);
+ }
+ aic_outb(p, SCB_LIST_NULL, SCB_TAG);
+ aic_outb(p, 0, SCB_CONTROL);
+ aic7xxx_add_curscb_to_free_list(p);
+ scb->flags = SCB_ABORT | SCB_QUEUED_FOR_DONE;
+ break;
+ }
+ prev_hscbptr = next_hscbptr;
+ next_hscbptr = aic_inb(p, SCB_NEXT);
+ }
+ aic_outb(p, saved_hscbptr, SCBPTR );
+ }
+
+/*
+ * Hmmm...completeq, QOUTFIFO, QINFIFO, WAITING_SCBH, waitingq all checked.
+ * OK...the sequencer's paused, interrupts are off, and we haven't found the
+ * command anyplace where it could be easily aborted. Time for the hard
+ * work. We also know the command is valid. This essentially means the
+ * command is disconnected, or connected but not into any phases yet, which
+ * we know due to the tests we ran earlier on the current active scb phase.
+ * At this point we can queue the abort tag and go on with life.
+ */
+
+ if ( found == 0 )
+ {
+ p->flags |= AHC_ABORT_PENDING;
+ scb->flags |= SCB_QUEUED_ABORT | SCB_ABORT | SCB_RECOVERY_SCB;
+ scb->hscb->control |= MK_MESSAGE;
+ result=aic7xxx_find_scb(p, scb);
+ if ( result != SCB_LIST_NULL )
+ {
+ saved_hscbptr = aic_inb(p, SCBPTR);
+ aic_outb(p, result, SCBPTR);
+ tmp_char = aic_inb(p, SCB_CONTROL);
+ aic_outb(p, tmp_char | MK_MESSAGE, SCB_CONTROL);
+ aic_outb(p, saved_hscbptr, SCBPTR);
+ }
+ if (aic7xxx_verbose & VERBOSE_ABORT_PROCESS)
+ printk(INFO_LEAD "SCB disconnected. Queueing Abort"
+ " SCB.\n", p->host_no, CTL_OF_SCB(scb));
+ p->qinfifo[p->qinfifonext++] = scb->hscb->tag;
+ if (p->features & AHC_QUEUE_REGS)
+ aic_outb(p, p->qinfifonext, HNSCB_QOFF);
+ else
+ aic_outb(p, p->qinfifonext, KERNEL_QINPOS);
+ }
+ if (found)
+ {
+ aic7xxx_run_done_queue(p, TRUE);
+ aic7xxx_run_waiting_queues(p);
+ }
+ p->flags &= ~AHC_IN_ABORT;
+ unpause_sequencer(p, FALSE);
+ DRIVER_UNLOCK
+
+/*
+ * On the return value. If we found the command and aborted it, then we know
+ * it's already sent back and there is no reason for a further timeout, so
+ * we use SCSI_ABORT_SUCCESS. On the queued abort side, we aren't so certain
+ * there hasn't been a bus hang or something that might keep the abort from
+ * from completing. Therefore, we use SCSI_ABORT_PENDING. The first time this
+ * is passed back, the timeout on the command gets extended, the second time
+ * we pass this back, the mid level SCSI code calls our reset function, which
+ * would shake loose a hung bus.
+ */
+ if ( found != 0 )
+ return(SCSI_ABORT_SUCCESS);
+ else
+ return(SCSI_ABORT_PENDING);
+}
+
+
+/*+F*************************************************************************
+ * Function:
+ * aic7xxx_reset
+ *
+ * Description:
+ * Resetting the bus always succeeds - is has to, otherwise the
+ * kernel will panic! Try a surgical technique - sending a BUS
+ * DEVICE RESET message - on the offending target before pulling
+ * the SCSI bus reset line.
+ *-F*************************************************************************/
+int
+aic7xxx_reset(Scsi_Cmnd *cmd, unsigned int flags)
+{
+ struct aic7xxx_scb *scb = NULL;
+ struct aic7xxx_host *p;
+ int tindex;
+ int result = -1;
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,1,95)
+ unsigned long cpu_flags = 0;
+#endif
+#define DEVICE_RESET 0x01
+#define BUS_RESET 0x02
+#define HOST_RESET 0x04
+#define FAIL 0x08
+#define RESET_DELAY 0x10
+ int action;
+ Scsi_Cmnd *cmd_prev, *cmd_next;
+
+
+ if ( cmd == NULL )
+ {
+ printk(KERN_WARNING "(scsi?:?:?:?) Reset called with NULL Scsi_Cmnd "
+ "pointer, failing.\n");
+ return(SCSI_RESET_SNOOZE);
+ }
+
+ p = (struct aic7xxx_host *) cmd->host->hostdata;
+ scb = (p->scb_data->scb_array[aic7xxx_position(cmd)]);
+ tindex = TARGET_INDEX(cmd);
+
+ /*
+ * I added a new config option to the driver: "panic_on_abort" that will
+ * cause the driver to panic and the machine to stop on the first abort
+ * or reset call into the driver. At that point, it prints out a lot of
+ * usefull information for me which I can then use to try and debug the
+ * problem. Simply enable the boot time prompt in order to activate this
+ * code.
+ */
+ if (aic7xxx_panic_on_abort)
+ aic7xxx_panic_abort(p, cmd);
+
+ DRIVER_LOCK
+
+ pause_sequencer(p);
+ while ( (aic_inb(p, INTSTAT) & INT_PEND) && !(p->flags & AHC_IN_ISR))
+ {
+ aic7xxx_isr(p->irq, p, (void *)NULL );
+ pause_sequencer(p);
+ aic7xxx_done_cmds_complete(p);
+ }
+
+ if (scb == NULL)
+ {
+ if (aic7xxx_verbose & VERBOSE_RESET_MID)
+ printk(INFO_LEAD "Reset called with bogus Scsi_Cmnd"
+ "->SCB mapping, improvising.\n", p->host_no, CTL_OF_CMD(cmd));
+ if ( flags & SCSI_RESET_SUGGEST_HOST_RESET )
+ {
+ action = HOST_RESET;
+ }
+ else
+ {
+ action = BUS_RESET;
+ }
+ }
+ else if (scb->cmd != cmd)
+ {
+ if (aic7xxx_verbose & VERBOSE_RESET_MID)
+ printk(INFO_LEAD "Reset called with recycled SCB "
+ "for cmd.\n", p->host_no, CTL_OF_CMD(cmd));
+ cmd_prev = NULL;
+ cmd_next = p->completeq.head;
+ while ( cmd_next != NULL )
+ {
+ if (cmd_next == cmd)
+ {
+ if (aic7xxx_verbose & VERBOSE_RESET_RETURN)
+ printk(INFO_LEAD "Reset, found cmd on completeq"
+ ", completing.\n", p->host_no, CTL_OF_CMD(cmd));
+ unpause_sequencer(p, FALSE);
+ DRIVER_UNLOCK
+ return(SCSI_RESET_NOT_RUNNING);
+ }
+ cmd_prev = cmd_next;
+ cmd_next = (Scsi_Cmnd *)cmd_next->host_scribble;
+ }
+ if ( !(flags & SCSI_RESET_SYNCHRONOUS) )
+ {
+ if (aic7xxx_verbose & VERBOSE_RESET_RETURN)
+ printk(INFO_LEAD "Reset, cmd not found,"
+ " failing.\n", p->host_no, CTL_OF_CMD(cmd));
+ unpause_sequencer(p, FALSE);
+ DRIVER_UNLOCK
+ return(SCSI_RESET_NOT_RUNNING);
+ }
+ else
+ {
+ if (aic7xxx_verbose & VERBOSE_RESET_MID)
+ printk(INFO_LEAD "Reset called, no scb, "
+ "flags 0x%x\n", p->host_no, CTL_OF_CMD(cmd), flags);
+ scb = NULL;
+ action = HOST_RESET;
+ }
+ }
+ else
+ {
+ if (aic7xxx_verbose & VERBOSE_RESET_MID)
+ printk(INFO_LEAD "Reset called, scb %d, flags "
+ "0x%x\n", p->host_no, CTL_OF_SCB(scb), scb->hscb->tag, scb->flags);
+ if ( aic7xxx_scb_on_qoutfifo(p, scb) )
+ {
+ if(aic7xxx_verbose & VERBOSE_RESET_RETURN)
+ printk(INFO_LEAD "SCB on qoutfifo, returning.\n", p->host_no,
+ CTL_OF_SCB(scb));
+ unpause_sequencer(p, FALSE);
+ DRIVER_UNLOCK
+ return(SCSI_RESET_NOT_RUNNING);
+ }
+ if ( flags & SCSI_RESET_SUGGEST_HOST_RESET )
+ {
+ action = HOST_RESET;
+ }
+ else if ( flags & SCSI_RESET_SUGGEST_BUS_RESET )
+ {
+ action = BUS_RESET;
+ }
+ else
+ {
+ action = DEVICE_RESET;
+ }
+ }
+ if ( (action & DEVICE_RESET) &&
+ (p->dev_flags[tindex] & BUS_DEVICE_RESET_PENDING) )
+ {
+ if (aic7xxx_verbose & VERBOSE_RESET_PROCESS)
+ printk(INFO_LEAD "Bus device reset already sent to "
+ "device, escalating.\n", p->host_no, CTL_OF_CMD(cmd));
+ action = BUS_RESET;
+ }
+ if ( (action & DEVICE_RESET) &&
+ (scb->flags & SCB_QUEUED_ABORT) )
+ {
+ if (aic7xxx_verbose & VERBOSE_RESET_PROCESS)
+ {
+ printk(INFO_LEAD "Have already attempted to reach "
+ "device with queued\n", p->host_no, CTL_OF_CMD(cmd));
+ printk(INFO_LEAD "message, will escalate to bus "
+ "reset.\n", p->host_no, CTL_OF_CMD(cmd));
+ }
+ action = BUS_RESET;
+ }
+ if ( (action & DEVICE_RESET) &&
+ (p->flags & (AHC_RESET_PENDING | AHC_ABORT_PENDING)) )
+ {
+ if (aic7xxx_verbose & VERBOSE_RESET_PROCESS)
+ printk(INFO_LEAD "Bus device reset stupid when "
+ "other action has failed.\n", p->host_no, CTL_OF_CMD(cmd));
+ action = BUS_RESET;
+ }
+ if ( (action & BUS_RESET) && !(p->features & AHC_TWIN) )
+ {
+ action = HOST_RESET;
+ }
+ if ( ((jiffies - p->dev_last_reset[tindex]) < (HZ * 3)) &&
+ !(action & (HOST_RESET | BUS_RESET)))
+ {
+ if (aic7xxx_verbose & VERBOSE_RESET_PROCESS)
+ {
+ printk(INFO_LEAD "Reset called too soon after last "
+ "reset without requesting\n", p->host_no, CTL_OF_CMD(cmd));
+ printk(INFO_LEAD "bus or host reset, escalating.\n", p->host_no,
+ CTL_OF_CMD(cmd));
+ }
+ action = BUS_RESET;
+ }
+ if ( ((jiffies - p->last_reset) < (HZ * 3)) &&
+ (action & (HOST_RESET | BUS_RESET)) )
+ {
+ if (aic7xxx_verbose & VERBOSE_RESET_PROCESS)
+ printk(INFO_LEAD "Reset called too soon after "
+ "last bus reset, delaying.\n", p->host_no, CTL_OF_CMD(cmd));
+ action = RESET_DELAY;
+ }
+ if ( (action & (BUS_RESET | HOST_RESET)) && (p->flags & AHC_IN_RESET)
+ && ((jiffies - p->reset_start) > (2 * HZ * 3)) )
+ {
+ printk(KERN_ERR "(scsi%d:%d:%d:%d) Yikes!! Card must have left to go "
+ "back to Adaptec!!\n", p->host_no, CTL_OF_CMD(cmd));
+ unpause_sequencer(p, FALSE);
+ DRIVER_UNLOCK
+ return(SCSI_RESET_SNOOZE);
+ }
+/*
+ * By this point, we want to already know what we are going to do and
+ * only have the following code implement our course of action.
+ */
+ switch (action)
+ {
+ case RESET_DELAY:
+ unpause_sequencer(p, FALSE);
+ DRIVER_UNLOCK
+ return(SCSI_RESET_PENDING);
+ break;
+ case FAIL:
+ unpause_sequencer(p, FALSE);
+ DRIVER_UNLOCK
+ return(SCSI_RESET_ERROR);
+ break;
+ case DEVICE_RESET:
+ p->flags |= AHC_IN_RESET;
+ result = aic7xxx_bus_device_reset(p, cmd);
+ aic7xxx_run_done_queue(p, TRUE);
+ /* We can't rely on run_waiting_queues to unpause the sequencer for
+ * PCI based controllers since we use AAP */
+ aic7xxx_run_waiting_queues(p);
+ unpause_sequencer(p, FALSE);
+ p->flags &= ~AHC_IN_RESET;
+ DRIVER_UNLOCK
+ return(result);
+ break;
+ case BUS_RESET:
+ case HOST_RESET:
+ default:
+ p->reset_start = jiffies;
+ p->flags |= AHC_IN_RESET;
+ aic7xxx_reset_channel(p, cmd->channel, TRUE);
+ if ( (p->features & AHC_TWIN) && (action & HOST_RESET) )
+ {
+ aic7xxx_reset_channel(p, cmd->channel ^ 0x01, TRUE);
+ restart_sequencer(p);
+ }
+ p->last_reset = jiffies;
+ if (action != HOST_RESET)
+ result = SCSI_RESET_SUCCESS | SCSI_RESET_BUS_RESET;
+ else
+ {
+ result = SCSI_RESET_SUCCESS | SCSI_RESET_HOST_RESET;
+ aic_outb(p, aic_inb(p, SIMODE1) & ~(ENREQINIT|ENBUSFREE),
+ SIMODE1);
+ aic7xxx_clear_intstat(p);
+ p->flags &= ~AHC_HANDLING_REQINITS;
+ p->msg_type = MSG_TYPE_NONE;
+ p->msg_index = 0;
+ p->msg_len = 0;
+ }
+ aic7xxx_run_done_queue(p, TRUE);
+ p->flags &= ~AHC_IN_RESET;
+ /* We can't rely on run_waiting_queues to unpause the sequencer for
+ * PCI based controllers since we use AAP */
+ aic7xxx_run_waiting_queues(p);
+ unpause_sequencer(p, FALSE);
+ DRIVER_UNLOCK
+ return(result);
+ break;
+ }
+}
+
+/*+F*************************************************************************
+ * Function:
+ * aic7xxx_biosparam
+ *
+ * Description:
+ * Return the disk geometry for the given SCSI device.
+ *-F*************************************************************************/
+int
+aic7xxx_biosparam(Disk *disk, kdev_t dev, int geom[])
+{
+ int heads, sectors, cylinders;
+ struct aic7xxx_host *p;
+
+ p = (struct aic7xxx_host *) disk->device->host->hostdata;
+
+ /*
+ * XXX - if I could portably find the card's configuration
+ * information, then this could be autodetected instead
+ * of left to a boot-time switch.
+ */
+ heads = 64;
+ sectors = 32;
+ cylinders = disk->capacity / (heads * sectors);
+
+ if ((p->flags & AHC_EXTEND_TRANS_A) && (cylinders > 1024))
+ {
+ heads = 255;
+ sectors = 63;
+ cylinders = disk->capacity / (heads * sectors);
+ }
+
+ geom[0] = heads;
+ geom[1] = sectors;
+ geom[2] = cylinders;
+
+ return (0);
+}
+
+/*+F*************************************************************************
+ * Function:
+ * aic7xxx_release
+ *
+ * Description:
+ * Free the passed in Scsi_Host memory structures prior to unloading the
+ * module.
+ *-F*************************************************************************/
+int
+aic7xxx_release(struct Scsi_Host *host)
+{
+ struct aic7xxx_host *p = (struct aic7xxx_host *) host->hostdata;
+ struct aic7xxx_host *next, *prev;
+
+ if(p->irq)
+ free_irq(p->irq, p);
+ release_region(p->base, MAXREG - MINREG);
+#ifdef MMAPIO
+ if(p->maddr)
+ {
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,1,0)
+ vfree((void *) (((unsigned long) p->maddr) & PAGE_MASK));
+#else
+ iounmap((void *) (((unsigned long) p->maddr) & PAGE_MASK));
+#endif
+ }
+#endif /* MMAPIO */
+ prev = NULL;
+ next = first_aic7xxx;
+ while(next != NULL)
+ {
+ if(next == p)
+ {
+ if(prev == NULL)
+ first_aic7xxx = next->next;
+ else
+ prev->next = next->next;
+ }
+ else
+ {
+ prev = next;
+ }
+ next = next->next;
+ }
+ aic7xxx_free(p);
+ return(0);
+}
+
+/*+F*************************************************************************
+ * Function:
+ * aic7xxx_print_card
+ *
+ * Description:
+ * Print out all of the control registers on the card
+ *
+ * NOTE: This function is not yet safe for use on the VLB and EISA
+ * controllers, so it isn't used on those controllers at all.
+ *-F*************************************************************************/
+static void
+aic7xxx_print_card(struct aic7xxx_host *p)
+{
+ int i, j, k, chip;
+ static struct register_ranges {
+ int num_ranges;
+ int range_val[32];
+ } cards_ds[] = {
+ { 0, {0,} }, /* none */
+ {10, {0x00, 0x05, 0x08, 0x11, 0x18, 0x19, 0x1f, 0x1f, 0x60, 0x60, /*7771*/
+ 0x62, 0x66, 0x80, 0x8e, 0x90, 0x95, 0x97, 0x97, 0x9b, 0x9f} },
+ { 9, {0x00, 0x05, 0x08, 0x11, 0x18, 0x1f, 0x60, 0x60, 0x62, 0x66, /*7850*/
+ 0x80, 0x8e, 0x90, 0x95, 0x97, 0x97, 0x9a, 0x9f} },
+ { 9, {0x00, 0x05, 0x08, 0x11, 0x18, 0x1f, 0x60, 0x60, 0x62, 0x66, /*7860*/
+ 0x80, 0x8e, 0x90, 0x95, 0x97, 0x97, 0x9a, 0x9f} },
+ {10, {0x00, 0x05, 0x08, 0x11, 0x18, 0x19, 0x1c, 0x1f, 0x60, 0x60, /*7870*/
+ 0x62, 0x66, 0x80, 0x8e, 0x90, 0x95, 0x97, 0x97, 0x9a, 0x9f} },
+ {10, {0x00, 0x05, 0x08, 0x11, 0x18, 0x1a, 0x1c, 0x1f, 0x60, 0x60, /*7880*/
+ 0x62, 0x66, 0x80, 0x8e, 0x90, 0x95, 0x97, 0x97, 0x9a, 0x9f} },
+ {16, {0x00, 0x05, 0x08, 0x11, 0x18, 0x1f, 0x60, 0x60, 0x62, 0x66, /*7890*/
+ 0x84, 0x8e, 0x90, 0x95, 0x97, 0x97, 0x9a, 0x9a, 0x9f, 0x9f,
+ 0xe0, 0xf1, 0xf4, 0xf4, 0xf6, 0xf6, 0xf8, 0xf8, 0xfa, 0xfc,
+ 0xfe, 0xff} },
+ {12, {0x00, 0x05, 0x08, 0x11, 0x18, 0x19, 0x1b, 0x1f, 0x60, 0x60, /*7895*/
+ 0x62, 0x66, 0x80, 0x8e, 0x90, 0x95, 0x97, 0x97, 0x9a, 0x9a,
+ 0x9f, 0x9f, 0xe0, 0xf1} },
+ {16, {0x00, 0x05, 0x08, 0x11, 0x18, 0x1f, 0x60, 0x60, 0x62, 0x66, /*7896*/
+ 0x84, 0x8e, 0x90, 0x95, 0x97, 0x97, 0x9a, 0x9a, 0x9f, 0x9f,
+ 0xe0, 0xf1, 0xf4, 0xf4, 0xf6, 0xf6, 0xf8, 0xf8, 0xfa, 0xfc,
+ 0xfe, 0xff} },
+ };
+#ifdef CONFIG_PCI
+ static struct register_ranges cards_ns[] = {
+ { 0, {0,} }, /* none */
+ { 0, {0,} }, /* 7771 */
+ { 7, {0x04, 0x08, 0x0c, 0x0e, 0x10, 0x17, 0x28, 0x2b, 0x30, 0x33,
+ 0x3c, 0x41, 0x43, 0x47} },
+ { 7, {0x04, 0x08, 0x0c, 0x0e, 0x10, 0x17, 0x28, 0x2b, 0x30, 0x33,
+ 0x3c, 0x41, 0x43, 0x47} },
+ { 5, {0x04, 0x08, 0x0c, 0x0e, 0x10, 0x17, 0x30, 0x33, 0x3c, 0x41} },
+ { 5, {0x04, 0x08, 0x0c, 0x0e, 0x10, 0x17, 0x30, 0x34, 0x3c, 0x47} },
+ { 5, {0x04, 0x08, 0x0c, 0x1b, 0x30, 0x34, 0x3c, 0x43, 0xdc, 0xe3} },
+ { 6, {0x04, 0x08, 0x0c, 0x0e, 0x10, 0x17, 0x30, 0x34, 0x3c, 0x47,
+ 0xdc, 0xe3} },
+ { 6, {0x04, 0x08, 0x0c, 0x1b, 0x30, 0x34, 0x3c, 0x43, 0xdc, 0xe3,
+ 0xff, 0xff} }
+ };
+#endif
+ chip = p->chip & AHC_CHIPID_MASK;
+ /*
+ * Let's run through the PCI space first....
+ */
+ printk("%s at ",
+ board_names[p->board_name_index]);
+ switch(p->chip & ~AHC_CHIPID_MASK)
+ {
+ case AHC_VL:
+ printk("VLB Slot %d.\n", p->pci_device_fn);
+ break;
+ case AHC_EISA:
+ printk("EISA Slot %d.\n", p->pci_device_fn);
+ break;
+ case AHC_PCI:
+ default:
+ printk("PCI %d/%d.\n", PCI_SLOT(p->pci_device_fn),
+ PCI_FUNC(p->pci_device_fn));
+ break;
+ }
+
+#ifdef CONFIG_PCI
+ {
+ unsigned char temp;
+
+ printk("PCI Dump:\n");
+ k=0;
+ for(i=0; i<cards_ns[chip].num_ranges; i++)
+ {
+ for(j = cards_ns[chip].range_val[ i * 2 ];
+ j <= cards_ns[chip].range_val[ i * 2 + 1 ] ;
+ j++)
+ {
+#if LINUX_VERSION_CODE > KERNEL_VERSION(2,1,92)
+ pci_read_config_byte(p->pdev, j, &temp);
+#else
+ pcibios_read_config_byte(p->pci_bus, p->pci_device_fn, j, &temp);
+#endif
+ printk("%02x:%02x ", j, temp);
+ if(++k == 13)
+ {
+ printk("\n");
+ k = 0;
+ }
+ }
+ }
+ }
+ if(k != 0)
+ printk("\n");
+#endif /* CONFIG_PCI */
+
+ /*
+ * Now the registers on the card....
+ */
+ printk("Card Dump:\n");
+ k = 0;
+ for(i=0; i<cards_ds[chip].num_ranges; i++)
+ {
+ for(j = cards_ds[chip].range_val[ i * 2 ];
+ j <= cards_ds[chip].range_val[ i * 2 + 1 ] ;
+ j++)
+ {
+ printk("%02x:%02x ", j, aic_inb(p, j));
+ if(++k == 13)
+ {
+ printk("\n");
+ k=0;
+ }
+ }
+ }
+ if(k != 0)
+ printk("\n");
+ if (p->flags & AHC_SEEPROM_FOUND)
+ {
+ unsigned short *sc1;
+ sc1 = (unsigned short *)&p->sc;
+
+ printk("SEEPROM dump.\n");
+ for(i=1; i<=32; i++)
+ {
+ printk("0x%04x", sc1[i-1]);
+ if ( (i % 8) == 0 )
+ printk("\n");
+ else
+ printk(" ");
+ }
+ }
+
+ /*
+ * If this was an Ultra2 controller, then we just hosed the card in terms
+ * of the QUEUE REGS. This function is only called at init time or by
+ * the panic_abort function, so it's safe to assume a generic init time
+ * setting here
+ */
+
+ if(p->features & AHC_QUEUE_REGS)
+ {
+ aic_outb(p, 0, SDSCB_QOFF);
+ aic_outb(p, 0, SNSCB_QOFF);
+ aic_outb(p, 0, HNSCB_QOFF);
+ }
+
+}
+
+/*+F*************************************************************************
+ * Function:
+ * aic7xxx_print_scratch_ram
+ *
+ * Description:
+ * Print out the scratch RAM values on the card.
+ *-F*************************************************************************/
+static void
+aic7xxx_print_scratch_ram(struct aic7xxx_host *p)
+{
+ int i, k;
+
+ k = 0;
+ printk("Scratch RAM:\n");
+ for(i = SRAM_BASE; i < SEQCTL; i++)
+ {
+ printk("%02x:%02x ", i, aic_inb(p, i));
+ if(++k == 13)
+ {
+ printk("\n");
+ k=0;
+ }
+ }
+ if (p->features & AHC_MORE_SRAM)
+ {
+ for(i = TARG_OFFSET; i < 0x80; i++)
+ {
+ printk("%02x:%02x ", i, aic_inb(p, i));
+ if(++k == 13)
+ {
+ printk("\n");
+ k=0;
+ }
+ }
+ }
+ printk("\n");
+}
+
+
+#include "aic7xxx_proc.c"
+
+#ifdef MODULE
+/* Eventually this will go into an include file, but this will be later */
+Scsi_Host_Template driver_template = AIC7XXX;
+
+#include "scsi_module.c"
+#endif
+
+/*
+ * Overrides for Emacs so that we almost follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only. This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-indent-level: 2
+ * c-brace-imaginary-offset: 0
+ * c-brace-offset: -2
+ * c-argdecl-indent: 2
+ * c-label-offset: -2
+ * c-continued-statement-offset: 2
+ * c-continued-brace-offset: 0
+ * indent-tabs-mode: nil
+ * tab-width: 8
+ * End:
+ */
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