/******************************************************************************
** Device driver for the PCI-SCSI NCR538XX controller family.
**
** Copyright (C) 1994 Wolfgang Stanglmeier
**
** 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 of the License, 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; if not, write to the Free Software
** Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
**
**-----------------------------------------------------------------------------
**
** This driver has been ported to Linux from the FreeBSD NCR53C8XX driver
** and is currently maintained by
**
** Gerard Roudier <groudier@club-internet.fr>
**
** Being given that this driver originates from the FreeBSD version, and
** in order to keep synergy on both, any suggested enhancements and corrections
** received on Linux are automatically a potential candidate for the FreeBSD
** version.
**
** The original driver has been written for 386bsd and FreeBSD by
** Wolfgang Stanglmeier <wolf@cologne.de>
** Stefan Esser <se@mi.Uni-Koeln.de>
**
** And has been ported to NetBSD by
** Charles M. Hannum <mycroft@gnu.ai.mit.edu>
**
**-----------------------------------------------------------------------------
**
** Brief history
**
** December 10 1995 by Gerard Roudier:
** Initial port to Linux.
**
** June 23 1996 by Gerard Roudier:
** Support for 64 bits architectures (Alpha).
**
** November 30 1996 by Gerard Roudier:
** Support for Fast-20 scsi.
** Support for large DMA fifo and 128 dwords bursting.
**
** February 27 1997 by Gerard Roudier:
** Support for Fast-40 scsi.
** Support for on-Board RAM.
**
** May 3 1997 by Gerard Roudier:
** Full support for scsi scripts instructions pre-fetching.
**
** May 19 1997 by Richard Waltham <dormouse@farsrobt.demon.co.uk>:
** Support for NvRAM detection and reading.
**
** August 18 1997 by Cort <cort@cs.nmt.edu>:
** Support for Power/PC (Big Endian).
**
*******************************************************************************
*/
/*
** 30 January 1998, version 2.5f.1
**
** Supported SCSI-II features:
** Synchronous negotiation
** Wide negotiation (depends on the NCR Chip)
** Enable disconnection
** Tagged command queuing
** Parity checking
** Etc...
**
** Supported NCR chips:
** 53C810 (8 bits, Fast SCSI-2, no rom BIOS)
** 53C815 (8 bits, Fast SCSI-2, on board rom BIOS)
** 53C820 (Wide, Fast SCSI-2, no rom BIOS)
** 53C825 (Wide, Fast SCSI-2, on board rom BIOS)
** 53C860 (8 bits, Fast 20, no rom BIOS)
** 53C875 (Wide, Fast 20, on board rom BIOS)
** 53C895 (Wide, Fast 40, on board rom BIOS)
**
** Other features:
** Memory mapped IO (linux-1.3.X and above only)
** Module
** Shared IRQ (since linux-1.3.72)
*/
#define SCSI_NCR_DEBUG_FLAGS (0)
#define NCR_GETCC_WITHMSG
/*==========================================================
**
** Include files
**
**==========================================================
*/
#define LinuxVersionCode(v, p, s) (((v)<<16)+((p)<<8)+(s))
#ifdef MODULE
#include <linux/module.h>
#endif
#include <asm/dma.h>
#include <asm/io.h>
#include <asm/system.h>
#include <linux/delay.h>
#include <linux/signal.h>
#include <linux/sched.h>
#include <linux/errno.h>
#include <linux/bios32.h>
#include <linux/pci.h>
#include <linux/string.h>
#include <linux/malloc.h>
#include <linux/mm.h>
#include <linux/ioport.h>
#include <linux/time.h>
#include <linux/timer.h>
#include <linux/stat.h>
#include <linux/version.h>
#if LINUX_VERSION_CODE >= LinuxVersionCode(1,3,0)
#include <linux/blk.h>
#else
#include "../block/blk.h"
#endif
#if LINUX_VERSION_CODE >= LinuxVersionCode(2,1,35)
#include <linux/init.h>
#else
#ifndef __initdata
#define __initdata
#endif
#ifndef __initfunc
#define __initfunc(__arginit) __arginit
#endif
#endif
#include "scsi.h"
#include "hosts.h"
#include "constants.h"
#include "sd.h"
#include <linux/types.h>
/*
** Define the BSD style u_int32 type
*/
typedef u32 u_int32;
#include "ncr53c8xx.h"
/*==========================================================
**
** Configuration and Debugging
**
**==========================================================
*/
/*
** SCSI address of this device.
** The boot routines should have set it.
** If not, use this.
*/
#ifndef SCSI_NCR_MYADDR
#define SCSI_NCR_MYADDR (7)
#endif
/*
** The maximum number of tags per logic unit.
** Used only for disk devices that support tags.
*/
#ifndef SCSI_NCR_MAX_TAGS
#define SCSI_NCR_MAX_TAGS (4)
#endif
/*
** Number of targets supported by the driver.
** n permits target numbers 0..n-1.
** Default is 7, meaning targets #0..#6.
** #7 .. is myself.
*/
#ifdef SCSI_NCR_MAX_TARGET
#define MAX_TARGET (SCSI_NCR_MAX_TARGET)
#else
#define MAX_TARGET (16)
#endif
/*
** Number of logic units supported by the driver.
** n enables logic unit numbers 0..n-1.
** The common SCSI devices require only
** one lun, so take 1 as the default.
*/
#ifdef SCSI_NCR_MAX_LUN
#define MAX_LUN SCSI_NCR_MAX_LUN
#else
#define MAX_LUN (1)
#endif
/*
** Asynchronous pre-scaler (ns). Shall be 40
*/
#ifndef SCSI_NCR_MIN_ASYNC
#define SCSI_NCR_MIN_ASYNC (40)
#endif
/*
** The maximum number of jobs scheduled for starting.
** There should be one slot per target, and one slot
** for each tag of each target in use.
** The calculation below is actually quite silly ...
*/
#ifdef SCSI_NCR_CAN_QUEUE
#define MAX_START (SCSI_NCR_CAN_QUEUE + 4)
#else
#define MAX_START (MAX_TARGET + 7 * SCSI_NCR_MAX_TAGS)
#endif
/*
** The maximum number of segments a transfer is split into.
*/
#define MAX_SCATTER (SCSI_NCR_MAX_SCATTER)
/*
** Io mapped or memory mapped.
*/
#if defined(SCSI_NCR_IOMAPPED)
#define NCR_IOMAPPED
#endif
/*
** other
*/
#define NCR_SNOOP_TIMEOUT (1000000)
/*==========================================================
**
** Defines for Linux.
**
** Linux and Bsd kernel functions are quite different.
** These defines allow a minimum change of the original
** code.
**
**==========================================================
*/
/*
** Obvious definitions
*/
#define printf printk
#define u_char unsigned char
#define u_short unsigned short
#define u_int unsigned int
#define u_long unsigned long
#ifndef MACH
typedef u_long vm_offset_t;
typedef int vm_size_t;
#endif
#define bcopy(s, d, n) memcpy((d), (s), (n))
#define bzero(d, n) memset((d), 0, (n))
#ifndef offsetof
#define offsetof(t, m) ((size_t) (&((t *)0)->m))
#endif
/*
** Address translation
**
** On Linux 1.3.X, virt_to_bus() must be used to translate
** virtual memory addresses of the kernel data segment into
** IO bus adresses.
** On i386 architecture, IO bus addresses match the physical
** addresses. But on other architectures they can be different.
** In the original Bsd driver, vtophys() is called to translate
** data addresses to IO bus addresses. In order to minimize
** change, I decide to define vtophys() as virt_to_bus().
*/
#if LINUX_VERSION_CODE >= LinuxVersionCode(1,3,0)
#define vtophys(p) virt_to_bus(p)
/*
** Memory mapped IO
**
** Since linux-2.1, we must use ioremap() to map the io memory space.
** iounmap() to unmap it. That allows portability.
** Linux 1.3.X and 2.0.X allow to remap physical pages addresses greater
** than the highest physical memory address to kernel virtual pages with
** vremap() / vfree(). That was not portable but worked with i386
** architecture.
*/
#ifndef NCR_IOMAPPED
__initfunc(
static vm_offset_t remap_pci_mem(u_long base, u_long size)
)
{
u_long page_base = ((u_long) base) & PAGE_MASK;
u_long page_offs = ((u_long) base) - page_base;
#if LINUX_VERSION_CODE >= LinuxVersionCode(2,1,0)
u_long page_remapped = (u_long) ioremap(page_base, page_offs+size);
#else
u_long page_remapped = (u_long) vremap(page_base, page_offs+size);
#endif
return (vm_offset_t) (page_remapped ? (page_remapped + page_offs) : 0UL);
}
__initfunc(
static void unmap_pci_mem(vm_offset_t vaddr, u_long size)
)
{
if (vaddr)
#if LINUX_VERSION_CODE >= LinuxVersionCode(2,1,0)
iounmap((void *) (vaddr & PAGE_MASK));
#else
vfree((void *) (vaddr & PAGE_MASK));
#endif
}
#endif /* !NCR_IOMAPPED */
#else /* linux-1.2.13 */
/*
** Linux 1.2.X assumes that addresses (virtual, physical, bus)
** are the same.
**
** I have not found how to do MMIO. It seems that only processes can
** map high physical pages to virtual (Xservers can do MMIO).
*/
#define vtophys(p) ((u_long) (p))
#endif
/*
** Insert a delay in micro-seconds.
*/
static void DELAY(long us)
{
for (;us>1000;us-=1000) udelay(1000);
if (us) udelay(us);
}
/*
** Internal data structure allocation.
**
** Linux scsi memory poor pool is adjusted for the need of
** middle-level scsi driver.
** We allocate our control blocks in the kernel memory pool
** to avoid scsi pool shortage.
** I notice that kmalloc() returns NULL during host attach under
** Linux 1.2.13. But this ncr driver is reliable enough to
** accomodate with this joke.
**
** kmalloc() only ensure 8 bytes boundary alignment.
** The NCR need better alignment for cache line bursting.
** The global header is moved betewen the NCB and CCBs and need
** origin and destination addresses to have same lower four bits.
**
** We use 32 boundary alignment for NCB and CCBs and offset multiple
** of 32 for global header fields. That's too much but at least enough.
*/
#define ALIGN_SIZE(shift) (1UL << shift)
#define ALIGN_MASK(shift) (~(ALIGN_SIZE(shift)-1))
#define NCB_ALIGN_SHIFT 5
#define CCB_ALIGN_SHIFT 5
#define LCB_ALIGN_SHIFT 5
#define SCR_ALIGN_SHIFT 5
#define NCB_ALIGN_SIZE ALIGN_SIZE(NCB_ALIGN_SHIFT)
#define NCB_ALIGN_MASK ALIGN_MASK(NCB_ALIGN_SHIFT)
#define CCB_ALIGN_SIZE ALIGN_SIZE(CCB_ALIGN_SHIFT)
#define CCB_ALIGN_MASK ALIGN_MASK(CCB_ALIGN_SHIFT)
#define SCR_ALIGN_SIZE ALIGN_SIZE(SCR_ALIGN_SHIFT)
#define SCR_ALIGN_MASK ALIGN_MASK(SCR_ALIGN_SHIFT)
static void *m_alloc(int size, int a_shift)
{
u_long addr;
void *ptr;
u_long a_size, a_mask;
if (a_shift < 3)
a_shift = 3;
a_size = ALIGN_SIZE(a_shift);
a_mask = ALIGN_MASK(a_shift);
ptr = (void *) kmalloc(size + a_size, GFP_ATOMIC);
if (ptr) {
addr = (((u_long) ptr) + a_size) & a_mask;
*((void **) (addr - sizeof(void *))) = ptr;
ptr = (void *) addr;
}
return ptr;
}
#ifdef MODULE
static void m_free(void *ptr, int size)
{
u_long addr;
if (ptr) {
addr = (u_long) ptr;
ptr = *((void **) (addr - sizeof(void *)));
kfree(ptr);
}
}
#endif
/*
** Transfer direction
**
** Low-level scsi drivers under Linux do not receive the expected
** data transfer direction from upper scsi drivers.
** The driver will only check actual data direction for common
** scsi opcodes. Other ones may cause problem, since they may
** depend on device type or be vendor specific.
** I would prefer to never trust the device for data direction,
** but that is not possible.
**
** The original driver requires the expected direction to be known.
** The Linux version of the driver has been enhanced in order to
** be able to transfer data in the direction choosen by the target.
*/
#define XferNone 0
#define XferIn 1
#define XferOut 2
#define XferBoth 3
static int guess_xfer_direction(int opcode);
/*
** Head of list of NCR boards
**
** For kernel version < 1.3.70, host is retrieved by its irq level.
** For later kernels, the internal host control block address
** (struct ncb) is used as device id parameter of the irq stuff.
*/
static struct Scsi_Host *first_host = NULL;
static Scsi_Host_Template *the_template = NULL;
/*
** /proc directory entry and proc_info function
*/
#if LINUX_VERSION_CODE >= LinuxVersionCode(1,3,0)
struct proc_dir_entry proc_scsi_ncr53c8xx = {
PROC_SCSI_NCR53C8XX, 9, "ncr53c8xx",
S_IFDIR | S_IRUGO | S_IXUGO, 2
};
# ifdef SCSI_NCR_PROC_INFO_SUPPORT
int ncr53c8xx_proc_info(char *buffer, char **start, off_t offset,
int length, int hostno, int func);
# endif
#endif
/*
** Table of target capabilities.
**
** This bitmap is anded with the byte 7 of inquiry data on completion of
** INQUIRY command.
** The driver never see zeroed bits and will ignore the corresponding
** capabilities of the target.
*/
static struct {
unsigned char and_map[MAX_TARGET];
} target_capabilities[SCSI_NCR_MAX_HOST] = { NCR53C8XX_TARGET_CAPABILITIES };
/*
** Driver setup.
**
** This structure is initialized from linux config options.
** It can be overridden at boot-up by the boot command line.
*/
struct ncr_driver_setup {
unsigned master_parity : 1;
unsigned scsi_parity : 1;
unsigned disconnection : 1;
unsigned special_features : 2;
unsigned ultra_scsi : 2;
unsigned force_sync_nego: 1;
unsigned reverse_probe: 1;
unsigned pci_fix_up: 4;
u_char use_nvram;
u_char verbose;
u_char default_tags;
u_short default_sync;
u_short debug;
u_char burst_max;
u_char led_pin;
u_char max_wide;
u_char settle_delay;
u_char diff_support;
u_char irqm;
u_char bus_check;
};
static struct ncr_driver_setup
driver_setup = SCSI_NCR_DRIVER_SETUP;
#ifdef SCSI_NCR_BOOT_COMMAND_LINE_SUPPORT
static struct ncr_driver_setup
driver_safe_setup __initdata = SCSI_NCR_DRIVER_SAFE_SETUP;
#ifdef MODULE
char *ncr53c8xx = 0; /* command line passed by insmod */
#endif
#endif
/*
** Other Linux definitions
*/
#define ScsiResult(host_code, scsi_code) (((host_code) << 16) + ((scsi_code) & 0x7f))
#if LINUX_VERSION_CODE >= LinuxVersionCode(2,0,0)
static void ncr53c8xx_select_queue_depths(struct Scsi_Host *host, struct scsi_device *devlist);
#endif
#if LINUX_VERSION_CODE >= LinuxVersionCode(1,3,70)
static void ncr53c8xx_intr(int irq, void *dev_id, struct pt_regs * regs);
#else
static void ncr53c8xx_intr(int irq, struct pt_regs * regs);
#endif
static void ncr53c8xx_timeout(unsigned long np);
#define initverbose (driver_setup.verbose)
#define bootverbose (np->verbose)
#ifdef SCSI_NCR_NVRAM_SUPPORT
/*
** Symbios NvRAM data format
*/
#define SYMBIOS_NVRAM_SIZE 368
#define SYMBIOS_NVRAM_ADDRESS 0x100
struct Symbios_nvram {
/* Header 6 bytes */
u_short start_marker; /* 0x0000 */
u_short byte_count; /* excluding header/trailer */
u_short checksum;
/* Controller set up 20 bytes */
u_short word0; /* 0x3000 */
u_short word2; /* 0x0000 */
u_short word4; /* 0x0000 */
u_short flags;
#define SYMBIOS_SCAM_ENABLE (1)
#define SYMBIOS_PARITY_ENABLE (1<<1)
#define SYMBIOS_VERBOSE_MSGS (1<<2)
u_short flags1;
#define SYMBIOS_SCAN_HI_LO (1)
u_short word10; /* 0x00 */
u_short flags3; /* 0x00 */
#define SYMBIOS_REMOVABLE_FLAGS (3) /* 0=none, 1=bootable, 2=all */
u_char host_id;
u_char byte15; /* 0x04 */
u_short word16; /* 0x0410 */
u_short word18; /* 0x0000 */
/* Boot order 14 bytes * 4 */
struct Symbios_host{
u_char word0; /* 0x0004:ok / 0x0000:nok */
u_short device_id; /* PCI device id */
u_short vendor_id; /* PCI vendor id */
u_char byte6; /* 0x00 */
u_char device_fn; /* PCI device/function number << 3*/
u_short word8;
u_short flags;
#define SYMBIOS_INIT_SCAN_AT_BOOT (1)
u_short io_port; /* PCI io_port address */
} host[4];
/* Targets 8 bytes * 16 */
struct Symbios_target {
u_short flags;
#define SYMBIOS_DISCONNECT_ENABLE (1)
#define SYMBIOS_SCAN_AT_BOOT_TIME (1<<1)
#define SYMBIOS_SCAN_LUNS (1<<2)
#define SYMBIOS_QUEUE_TAGS_ENABLED (1<<3)
u_char bus_width; /* 0x08/0x10 */
u_char sync_offset;
u_char sync_period; /* 4*period factor */
u_char byte6; /* 0x00 */
u_short timeout;
} target[16];
u_char spare_devices[19*8];
u_char trailer[6]; /* 0xfe 0xfe 0x00 0x00 0x00 0x00 */
};
typedef struct Symbios_nvram Symbios_nvram;
typedef struct Symbios_host Symbios_host;
typedef struct Symbios_target Symbios_target;
/*
** Tekram NvRAM data format.
*/
#define TEKRAM_NVRAM_SIZE 64
#define TEKRAM_NVRAM_ADDRESS 0
struct Tekram_nvram {
struct Tekram_target {
u_char flags;
#define TEKRAM_PARITY_CHECK (1)
#define TEKRAM_SYNC_NEGO (1<<1)
#define TEKRAM_DISCONNECT_ENABLE (1<<2)
#define TEKRAM_START_CMD (1<<3)
#define TEKRAM_TAGGED_COMMANDS (1<<4)
#define TEKRAM_WIDE_NEGO (1<<5)
u_char sync_index;
u_short word2;
} target[16];
u_char host_id;
u_char flags;
#define TEKRAM_MORE_THAN_2_DRIVES (1)
#define TEKRAM_DRIVES_SUP_1GB (1<<1)
#define TEKRAM_RESET_ON_POWER_ON (1<<2)
#define TEKRAM_ACTIVE_NEGATION (1<<3)
#define TEKRAM_IMMEDIATE_SEEK (1<<4)
#define TEKRAM_SCAN_LUNS (1<<5)
#define TEKRAM_REMOVABLE_FLAGS (3<<6) /* 0: disable; 1: boot device; 2:all */
u_char boot_delay_index;
u_char max_tags_index;
u_short flags1;
#define TEKRAM_F2_F6_ENABLED (1)
u_short spare[29];
};
typedef struct Tekram_nvram Tekram_nvram;
typedef struct Tekram_target Tekram_target;
static u_char Tekram_sync[12] __initdata = {25,31,37,43,50,62,75,125,12,15,18,21};
#endif /* SCSI_NCR_NVRAM_SUPPORT */
/*
** Structures used by ncr53c8xx_detect/ncr53c8xx_pci_init to
** transmit device configuration to the ncr_attach() function.
*/
typedef struct {
int bus;
u_char device_fn;
u_int base;
u_int base_2;
u_int io_port;
int irq;
/* port and reg fields to use INB, OUTB macros */
u_int port;
volatile struct ncr_reg *reg;
} ncr_slot;
typedef struct {
int type;
#define SCSI_NCR_SYMBIOS_NVRAM (1)
#define SCSI_NCR_TEKRAM_NVRAM (2)
#ifdef SCSI_NCR_NVRAM_SUPPORT
union {
Symbios_nvram Symbios;
Tekram_nvram Tekram;
} data;
#endif
} ncr_nvram;
/*
** Structure used by ncr53c8xx_detect/ncr53c8xx_pci_init
** to save data on each detected board for ncr_attach().
*/
typedef struct {
ncr_slot slot;
ncr_chip chip;
ncr_nvram *nvram;
int attach_done;
} ncr_device;
/*==========================================================
**
** Debugging tags
**
**==========================================================
*/
#define DEBUG_ALLOC (0x0001)
#define DEBUG_PHASE (0x0002)
#define DEBUG_POLL (0x0004)
#define DEBUG_QUEUE (0x0008)
#define DEBUG_RESULT (0x0010)
#define DEBUG_SCATTER (0x0020)
#define DEBUG_SCRIPT (0x0040)
#define DEBUG_TINY (0x0080)
#define DEBUG_TIMING (0x0100)
#define DEBUG_NEGO (0x0200)
#define DEBUG_TAGS (0x0400)
#define DEBUG_FREEZE (0x0800)
#define DEBUG_RESTART (0x1000)
/*
** Enable/Disable debug messages.
** Can be changed at runtime too.
*/
#ifdef SCSI_NCR_DEBUG_INFO_SUPPORT
#define DEBUG_FLAGS ncr_debug
#else
#define DEBUG_FLAGS SCSI_NCR_DEBUG_FLAGS
#endif
/*==========================================================
**
** assert ()
**
**==========================================================
**
** modified copy from 386bsd:/usr/include/sys/assert.h
**
**----------------------------------------------------------
*/
#define assert(expression) { \
if (!(expression)) { \
(void)printf(\
"assertion \"%s\" failed: file \"%s\", line %d\n", \
#expression, \
__FILE__, __LINE__); \
} \
}
/*==========================================================
**
** Big/Little endian support.
**
**==========================================================
*/
/*
** If the NCR uses big endian addressing mode over the
** PCI, actual io register addresses for byte and word
** accesses must be changed according to lane routing.
** Btw, ncr_offb() and ncr_offw() macros only apply to
** constants and so donnot generate bloated code.
*/
#if defined(SCSI_NCR_BIG_ENDIAN)
#define ncr_offb(o) (((o)&~3)+((~((o)&3))&3))
#define ncr_offw(o) (((o)&~3)+((~((o)&3))&2))
#else
#define ncr_offb(o) (o)
#define ncr_offw(o) (o)
#endif
/*
** If the CPU and the NCR use same endian-ness adressing,
** no byte reordering is needed for script patching.
** Macro cpu_to_scr() is to be used for script patching.
** Macro scr_to_cpu() is to be used for getting a DWORD
** from the script.
*/
#if defined(__BIG_ENDIAN) && !defined(SCSI_NCR_BIG_ENDIAN)
#define cpu_to_scr(dw) cpu_to_le32(dw)
#define scr_to_cpu(dw) le32_to_cpu(dw)
#elif defined(__LITTLE_ENDIAN) && defined(SCSI_NCR_BIG_ENDIAN)
#define cpu_to_scr(dw) cpu_to_be32(dw)
#define scr_to_cpu(dw) be32_to_cpu(dw)
#else
#define cpu_to_scr(dw) (dw)
#define scr_to_cpu(dw) (dw)
#endif
/*==========================================================
**
** Access to the controller chip.
**
** If NCR_IOMAPPED is defined, only IO are used by the driver.
**
**==========================================================
*/
/*
** If the CPU and the NCR use same endian-ness adressing,
** no byte reordering is needed for accessing chip io
** registers. Functions suffixed by '_raw' are assumed
** to access the chip over the PCI without doing byte
** reordering. Functions suffixed by '_l2b' are
** assumed to perform little-endian to big-endian byte
** reordering, those suffixed by '_b2l' blah, blah,
** blah, ...
*/
#if defined(NCR_IOMAPPED)
/*
** IO mapped only input / ouput
*/
#define INB_OFF(o) inb (np->port + ncr_offb(o))
#define OUTB_OFF(o, val) outb ((val), np->port + ncr_offb(o))
#if defined(__BIG_ENDIAN) && !defined(SCSI_NCR_BIG_ENDIAN)
#define INW_OFF(o) inw_l2b (np->port + ncr_offw(o))
#define INL_OFF(o) inl_l2b (np->port + (o))
#define OUTW_OFF(o, val) outw_b2l ((val), np->port + ncr_offw(o))
#define OUTL_OFF(o, val) outl_b2l ((val), np->port + (o))
#elif defined(__LITTLE_ENDIAN) && defined(SCSI_NCR_BIG_ENDIAN)
#define INW_OFF(o) inw_b2l (np->port + ncr_offw(o))
#define INL_OFF(o) inl_b2l (np->port + (o))
#define OUTW_OFF(o, val) outw_l2b ((val), np->port + ncr_offw(o))
#define OUTL_OFF(o, val) outl_l2b ((val), np->port + (o))
#else
#define INW_OFF(o) inw_raw (np->port + ncr_offw(o))
#define INL_OFF(o) inl_raw (np->port + (o))
#define OUTW_OFF(o, val) outw_raw ((val), np->port + ncr_offw(o))
#define OUTL_OFF(o, val) outl_raw ((val), np->port + (o))
#endif /* ENDIANs */
#else /* defined NCR_IOMAPPED */
/*
** MEMORY mapped IO input / output
*/
#define INB_OFF(o) readb((char *)np->reg + ncr_offb(o))
#define OUTB_OFF(o, val) writeb((val), (char *)np->reg + ncr_offb(o))
#if defined(__BIG_ENDIAN) && !defined(SCSI_NCR_BIG_ENDIAN)
#define INW_OFF(o) readw_l2b((char *)np->reg + ncr_offw(o))
#define INL_OFF(o) readl_l2b((char *)np->reg + (o))
#define OUTW_OFF(o, val) writew_b2l((val), (char *)np->reg + ncr_offw(o))
#define OUTL_OFF(o, val) writel_b2l((val), (char *)np->reg + (o))
#elif defined(__LITTLE_ENDIAN) && defined(SCSI_NCR_BIG_ENDIAN)
#define INW_OFF(o) readw_b2l((char *)np->reg + ncr_offw(o))
#define INL_OFF(o) readl_b2l((char *)np->reg + (o))
#define OUTW_OFF(o, val) writew_l2b((val), (char *)np->reg + ncr_offw(o))
#define OUTL_OFF(o, val) writel_l2b((val), (char *)np->reg + (o))
#else
#define INW_OFF(o) readw_raw((char *)np->reg + ncr_offw(o))
#define INL_OFF(o) readl_raw((char *)np->reg + (o))
#define OUTW_OFF(o, val) writew_raw((val), (char *)np->reg + ncr_offw(o))
#define OUTL_OFF(o, val) writel_raw((val), (char *)np->reg + (o))
#endif
#endif /* defined NCR_IOMAPPED */
#define INB(r) INB_OFF (offsetof(struct ncr_reg,r))
#define INW(r) INW_OFF (offsetof(struct ncr_reg,r))
#define INL(r) INL_OFF (offsetof(struct ncr_reg,r))
#define OUTB(r, val) OUTB_OFF (offsetof(struct ncr_reg,r), (val))
#define OUTW(r, val) OUTW_OFF (offsetof(struct ncr_reg,r), (val))
#define OUTL(r, val) OUTL_OFF (offsetof(struct ncr_reg,r), (val))
/*
** Set bit field ON, OFF
*/
#define OUTONB(r, m) OUTB(r, INB(r) | (m))
#define OUTOFFB(r, m) OUTB(r, INB(r) & ~(m))
#define OUTONW(r, m) OUTW(r, INW(r) | (m))
#define OUTOFFW(r, m) OUTW(r, INW(r) & ~(m))
#define OUTONL(r, m) OUTL(r, INL(r) | (m))
#define OUTOFFL(r, m) OUTL(r, INL(r) & ~(m))
/*==========================================================
**
** Command control block states.
**
**==========================================================
*/
#define HS_IDLE (0)
#define HS_BUSY (1)
#define HS_NEGOTIATE (2) /* sync/wide data transfer*/
#define HS_DISCONNECT (3) /* Disconnected by target */
#define HS_COMPLETE (4)
#define HS_SEL_TIMEOUT (5) /* Selection timeout */
#define HS_RESET (6) /* SCSI reset */
#define HS_ABORTED (7) /* Transfer aborted */
#define HS_TIMEOUT (8) /* Software timeout */
#define HS_FAIL (9) /* SCSI or PCI bus errors */
#define HS_UNEXPECTED (10) /* Unexpected disconnect */
#define HS_DONEMASK (0xfc)
/*==========================================================
**
** Software Interrupt Codes
**
**==========================================================
*/
#define SIR_SENSE_RESTART (1)
#define SIR_SENSE_FAILED (2)
#define SIR_STALL_RESTART (3)
#define SIR_STALL_QUEUE (4)
#define SIR_NEGO_SYNC (5)
#define SIR_NEGO_WIDE (6)
#define SIR_NEGO_FAILED (7)
#define SIR_NEGO_PROTO (8)
#define SIR_REJECT_RECEIVED (9)
#define SIR_REJECT_SENT (10)
#define SIR_IGN_RESIDUE (11)
#define SIR_MISSING_SAVE (12)
#define SIR_DATA_IO_IS_OUT (13)
#define SIR_DATA_IO_IS_IN (14)
#define SIR_MAX (14)
/*==========================================================
**
** Extended error codes.
** xerr_status field of struct ccb.
**
**==========================================================
*/
#define XE_OK (0)
#define XE_EXTRA_DATA (1) /* unexpected data phase */
#define XE_BAD_PHASE (2) /* illegal phase (4/5) */
/*==========================================================
**
** Negotiation status.
** nego_status field of struct ccb.
**
**==========================================================
*/
#define NS_SYNC (1)
#define NS_WIDE (2)
/*==========================================================
**
** "Special features" of targets.
** quirks field of struct tcb.
** actualquirks field of struct ccb.
**
**==========================================================
*/
#define QUIRK_AUTOSAVE (0x01)
#define QUIRK_NOMSG (0x02)
#define QUIRK_NOSYNC (0x10)
#define QUIRK_NOWIDE16 (0x20)
#define QUIRK_UPDATE (0x80)
/*==========================================================
**
** Capability bits in Inquire response byte 7.
**
**==========================================================
*/
#define INQ7_QUEUE (0x02)
#define INQ7_SYNC (0x10)
#define INQ7_WIDE16 (0x20)
/*==========================================================
**
** Misc.
**
**==========================================================
*/
#define CCB_MAGIC (0xf2691ad2)
/*==========================================================
**
** Declaration of structs.
**
**==========================================================
*/
struct tcb;
struct lcb;
struct ccb;
struct ncb;
struct script;
typedef struct ncb * ncb_p;
typedef struct tcb * tcb_p;
typedef struct lcb * lcb_p;
typedef struct ccb * ccb_p;
struct link {
ncrcmd l_cmd;
ncrcmd l_paddr;
};
struct usrcmd {
u_long target;
u_long lun;
u_long data;
u_long cmd;
};
#define UC_SETSYNC 10
#define UC_SETTAGS 11
#define UC_SETDEBUG 12
#define UC_SETORDER 13
#define UC_SETWIDE 14
#define UC_SETFLAG 15
#define UC_CLEARPROF 16
#ifdef SCSI_NCR_DEBUG_ERROR_RECOVERY_SUPPORT
#define UC_DEBUG_ERROR_RECOVERY 17
#endif
#define UF_TRACE (0x01)
#define UF_NODISC (0x02)
#define UF_NOSCAN (0x04)
/*---------------------------------------
**
** Timestamps for profiling
**
**---------------------------------------
*/
struct tstamp {
u_long start;
u_long end;
u_long select;
u_long command;
u_long status;
u_long disconnect;
u_long reselect;
};
/*
** profiling data (per device)
*/
struct profile {
u_long num_trans;
u_long num_kbytes;
u_long rest_bytes;
u_long num_disc;
u_long num_break;
u_long num_int;
u_long num_fly;
u_long ms_setup;
u_long ms_data;
u_long ms_disc;
u_long ms_post;
};
/*==========================================================
**
** Declaration of structs: target control block
**
**==========================================================
*/
struct tcb {
/*
** during reselection the ncr jumps to this point
** with SFBR set to the encoded target number
** with bit 7 set.
** if it's not this target, jump to the next.
**
** JUMP IF (SFBR != #target#)
** @(next tcb)
*/
struct link jump_tcb;
/*
** load the actual values for the sxfer and the scntl3
** register (sync/wide mode).
**
** SCR_COPY (1);
** @(sval field of this tcb)
** @(sxfer register)
** SCR_COPY (1);
** @(wval field of this tcb)
** @(scntl3 register)
*/
ncrcmd getscr[6];
/*
** if next message is "identify"
** then load the message to SFBR,
** else load 0 to SFBR.
**
** CALL
** <RESEL_LUN>
*/
struct link call_lun;
/*
** now look for the right lun.
**
** JUMP
** @(first ccb of this lun)
*/
struct link jump_lcb;
/*
** pointer to interrupted getcc ccb
*/
ccb_p hold_cp;
/*
** pointer to ccb used for negotiating.
** Avoid to start a nego for all queued commands
** when tagged command queuing is enabled.
*/
ccb_p nego_cp;
/*
** statistical data
*/
u_long transfers;
u_long bytes;
/*
** user settable limits for sync transfer
** and tagged commands.
** These limits are read from the NVRAM if present.
*/
u_char usrsync;
u_char usrwide;
u_char usrtags;
u_char usrflag;
u_char numtags;
u_char maxtags;
u_short num_good;
/*
** negotiation of wide and synch transfer.
** device quirks.
*/
/*0*/ u_char minsync;
/*1*/ u_char sval;
/*2*/ u_short period;
/*0*/ u_char maxoffs;
/*1*/ u_char quirks;
/*2*/ u_char widedone;
/*3*/ u_char wval;
/*
** inquire data
*/
#define MAX_INQUIRE 36
u_char inqdata[MAX_INQUIRE];
/*
** the lcb's of this tcb
*/
lcb_p lp[MAX_LUN];
};
/*==========================================================
**
** Declaration of structs: lun control block
**
**==========================================================
*/
struct lcb {
/*
** during reselection the ncr jumps to this point
** with SFBR set to the "Identify" message.
** if it's not this lun, jump to the next.
**
** JUMP IF (SFBR != #lun#)
** @(next lcb of this target)
*/
struct link jump_lcb;
/*
** if next message is "simple tag",
** then load the tag to SFBR,
** else load 0 to SFBR.
**
** CALL
** <RESEL_TAG>
*/
struct link call_tag;
/*
** now look for the right ccb.
**
** JUMP
** @(first ccb of this lun)
*/
struct link jump_ccb;
/*
** start of the ccb chain
*/
ccb_p next_ccb;
/*
** Control of tagged queueing
*/
u_char reqccbs;
u_char actccbs;
u_char reqlink;
u_char actlink;
u_char usetags;
u_char lasttag;
/*
** Linux specific fields:
** Number of active commands and current credit.
** Should be managed by the generic scsi driver
*/
u_char active;
u_char opennings;
/*-----------------------------------------------
** Flag to force M_ORDERED_TAG on next command
** in order to avoid spurious timeout when
** M_SIMPLE_TAG is used for all operations.
**-----------------------------------------------
*/
u_char force_ordered_tag;
#define NCR_TIMEOUT_INCREASE (5*HZ)
};
/*==========================================================
**
** Declaration of structs: COMMAND control block
**
**==========================================================
**
** This substructure is copied from the ccb to a
** global address after selection (or reselection)
** and copied back before disconnect.
**
** These fields are accessible to the script processor.
**
**----------------------------------------------------------
*/
struct head {
/*
** Execution of a ccb starts at this point.
** It's a jump to the "SELECT" label
** of the script.
**
** After successful selection the script
** processor overwrites it with a jump to
** the IDLE label of the script.
*/
struct link launch;
/*
** Saved data pointer.
** Points to the position in the script
** responsible for the actual transfer
** of data.
** It's written after reception of a
** "SAVE_DATA_POINTER" message.
** The goalpointer points after
** the last transfer command.
*/
u_int32 savep;
u_int32 lastp;
u_int32 goalp;
/*
** The virtual address of the ccb
** containing this header.
*/
ccb_p cp;
/*
** space for some timestamps to gather
** profiling data about devices and this driver.
*/
struct tstamp stamp;
/*
** status fields.
*/
u_char scr_st[4]; /* script status */
u_char status[4]; /* host status. Must be the last */
/* DWORD of the CCB header */
};
/*
** The status bytes are used by the host and the script processor.
**
** The byte corresponding to the host_status must be stored in the
** last DWORD of the CCB header since it is used for command
** completion (ncr_wakeup()). Doing so, we are sure that the header
** has been entirely copied back to the CCB when the host_status is
** seen complete by the CPU.
**
** The last four bytes (status[4]) are copied to the scratchb register
** (declared as scr0..scr3 in ncr_reg.h) just after the select/reselect,
** and copied back just after disconnecting.
** Inside the script the XX_REG are used.
**
** The first four bytes (scr_st[4]) are used inside the script by
** "COPY" commands.
** Because source and destination must have the same alignment
** in a DWORD, the fields HAVE to be at the choosen offsets.
** xerr_st 0 (0x34) scratcha
** sync_st 1 (0x05) sxfer
** wide_st 3 (0x03) scntl3
*/
/*
** Last four bytes (script)
*/
#define QU_REG scr0
#define HS_REG scr1
#define HS_PRT nc_scr1
#define SS_REG scr2
#define PS_REG scr3
/*
** Last four bytes (host)
*/
#define actualquirks phys.header.status[0]
#define host_status phys.header.status[1]
#define scsi_status phys.header.status[2]
#define parity_status phys.header.status[3]
/*
** First four bytes (script)
*/
#define xerr_st header.scr_st[0]
#define sync_st header.scr_st[1]
#define nego_st header.scr_st[2]
#define wide_st header.scr_st[3]
/*
** First four bytes (host)
*/
#define xerr_status phys.xerr_st
#define sync_status phys.sync_st
#define nego_status phys.nego_st
#define wide_status phys.wide_st
/*==========================================================
**
** Declaration of structs: Data structure block
**
**==========================================================
**
** During execution of a ccb by the script processor,
** the DSA (data structure address) register points
** to this substructure of the ccb.
** This substructure contains the header with
** the script-processor-changable data and
** data blocks for the indirect move commands.
**
**----------------------------------------------------------
*/
struct dsb {
/*
** Header.
** Has to be the first entry,
** because it's jumped to by the
** script processor
*/
struct head header;
/*
** Table data for Script
*/
struct scr_tblsel select;
struct scr_tblmove smsg ;
struct scr_tblmove smsg2 ;
struct scr_tblmove cmd ;
struct scr_tblmove scmd ;
struct scr_tblmove sense ;
struct scr_tblmove data [MAX_SCATTER];
};
/*==========================================================
**
** Declaration of structs: Command control block.
**
**==========================================================
**
** During execution of a ccb by the script processor,
** the DSA (data structure address) register points
** to this substructure of the ccb.
** This substructure contains the header with
** the script-processor-changable data and then
** data blocks for the indirect move commands.
**
**----------------------------------------------------------
*/
struct ccb {
/*
** This field forces 32 bytes alignement for phys.header,
** in order to use cache line bursting when copying it
** to the ncb.
*/
struct link filler[2];
/*
** during reselection the ncr jumps to this point.
** If a "SIMPLE_TAG" message was received,
** then SFBR is set to the tag.
** else SFBR is set to 0
** If looking for another tag, jump to the next ccb.
**
** JUMP IF (SFBR != #TAG#)
** @(next ccb of this lun)
*/
struct link jump_ccb;
/*
** After execution of this call, the return address
** (in the TEMP register) points to the following
** data structure block.
** So copy it to the DSA register, and start
** processing of this data structure.
**
** CALL
** <RESEL_TMP>
*/
struct link call_tmp;
/*
** This is the data structure which is
** to be executed by the script processor.
*/
struct dsb phys;
/*
** If a data transfer phase is terminated too early
** (after reception of a message (i.e. DISCONNECT)),
** we have to prepare a mini script to transfer
** the rest of the data.
*/
ncrcmd patch[8];
/*
** The general SCSI driver provides a
** pointer to a control block.
*/
Scsi_Cmnd *cmd;
int data_len;
/*
** We prepare a message to be sent after selection,
** and a second one to be sent after getcc selection.
** Contents are IDENTIFY and SIMPLE_TAG.
** While negotiating sync or wide transfer,
** a SDTM or WDTM message is appended.
*/
u_char scsi_smsg [8];
u_char scsi_smsg2[8];
/*
** Lock this ccb.
** Flag is used while looking for a free ccb.
*/
u_long magic;
/*
** Physical address of this instance of ccb
*/
u_long p_ccb;
/*
** Completion time out for this job.
** It's set to time of start + allowed number of seconds.
*/
u_long tlimit;
/*
** All ccbs of one hostadapter are chained.
*/
ccb_p link_ccb;
/*
** All ccbs of one target/lun are chained.
*/
ccb_p next_ccb;
/*
** Sense command
*/
u_char sensecmd[6];
/*
** Tag for this transfer.
** It's patched into jump_ccb.
** If it's not zero, a SIMPLE_TAG
** message is included in smsg.
*/
u_char tag;
/*
** Number of segments of the scatter list.
** Used for recalculation of savep/goalp/lastp on
** SIR_DATA_IO_IS_OUT interrupt.
*/
u_char segments;
};
#define CCB_PHYS(cp,lbl) (cp->p_ccb + offsetof(struct ccb, lbl))
/*==========================================================
**
** Declaration of structs: NCR device descriptor
**
**==========================================================
*/
struct ncb {
/*
** The global header.
** Accessible to both the host and the
** script-processor.
** Is 32 bytes aligned since ncb is, in order to
** allow cache line bursting when copying it from or
** to ccbs.
*/
struct head header;
/*-----------------------------------------------
** Specific Linux fields
**-----------------------------------------------
*/
int unit; /* Unit number */
char chip_name[8]; /* Chip name */
char inst_name[16]; /* Instance name */
struct timer_list timer; /* Timer link header */
int ncr_cache; /* Cache test variable */
Scsi_Cmnd *waiting_list; /* Waiting list header for commands */
/* that we can't put into the squeue */
u_long settle_time; /* Reset in progess */
u_char release_stage; /* Synchronisation stage on release */
u_char verbose; /* Boot verbosity for this controller*/
#ifdef SCSI_NCR_DEBUG_ERROR_RECOVERY_SUPPORT
u_char debug_error_recovery;
u_char stalling;
u_char assert_atn;
#endif
/*-----------------------------------------------
** Added field to support differences
** between ncr chips.
** sv_xxx are some io register bit value at start-up and
** so assumed to have been set by the sdms bios.
** rv_xxx are the bit fields of io register that will keep
** the features used by the driver.
**-----------------------------------------------
*/
u_short device_id;
u_char revision_id;
u_char sv_scntl0;
u_char sv_scntl3;
u_char sv_dmode;
u_char sv_dcntl;
u_char sv_ctest3;
u_char sv_ctest4;
u_char sv_ctest5;
u_char sv_gpcntl;
u_char sv_stest2;
u_char sv_stest4;
u_char rv_scntl0;
u_char rv_scntl3;
u_char rv_dmode;
u_char rv_dcntl;
u_char rv_ctest3;
u_char rv_ctest4;
u_char rv_ctest5;
u_char rv_stest2;
u_char scsi_mode;
/*-----------------------------------------------
** Scripts ..
**-----------------------------------------------
**
** During reselection the ncr jumps to this point.
** The SFBR register is loaded with the encoded target id.
**
** Jump to the first target.
**
** JUMP
** @(next tcb)
*/
struct link jump_tcb;
/*-----------------------------------------------
** Configuration ..
**-----------------------------------------------
**
** virtual and physical addresses
** of the 53c810 chip.
*/
vm_offset_t vaddr;
vm_offset_t paddr;
vm_offset_t vaddr2;
vm_offset_t paddr2;
/*
** pointer to the chip's registers.
*/
volatile
struct ncr_reg* reg;
/*
** A copy of the scripts, relocated for this ncb.
*/
struct script *script0;
struct scripth *scripth0;
/*
** Scripts instance virtual address.
*/
struct script *script;
struct scripth *scripth;
/*
** Scripts instance physical address.
*/
u_long p_script;
u_long p_scripth;
/*
** The SCSI address of the host adapter.
*/
u_char myaddr;
/*
** Max dwords burst supported by the adapter.
*/
u_char maxburst; /* log base 2 of dwords burst */
/*
** timing parameters
*/
u_char minsync; /* Minimum sync period factor */
u_char maxsync; /* Maximum sync period factor */
u_char maxoffs; /* Max scsi offset */
u_char multiplier; /* Clock multiplier (1,2,4) */
u_char clock_divn; /* Number of clock divisors */
u_long clock_khz; /* SCSI clock frequency in KHz */
u_int features; /* Chip features map */
/*-----------------------------------------------
** Link to the generic SCSI driver
**-----------------------------------------------
*/
/* struct scsi_link sc_link; */
/*-----------------------------------------------
** Job control
**-----------------------------------------------
**
** Commands from user
*/
struct usrcmd user;
u_char order;
/*
** Target data
*/
struct tcb target[MAX_TARGET];
/*
** Start queue.
*/
u_int32 squeue [MAX_START];
u_short squeueput;
u_short actccbs;
/*
** Timeout handler
*/
#if 0
u_long heartbeat;
u_short ticks;
u_short latetime;
#endif
u_long lasttime;
/*-----------------------------------------------
** Debug and profiling
**-----------------------------------------------
**
** register dump
*/
struct ncr_reg regdump;
u_long regtime;
/*
** Profiling data
*/
struct profile profile;
u_long disc_phys;
u_long disc_ref;
/*
** The global control block.
** It's used only during the configuration phase.
** A target control block will be created
** after the first successful transfer.
*/
struct ccb *ccb;
/*
** message buffers.
** Should be longword aligned,
** because they're written with a
** COPY script command.
*/
u_char msgout[8];
u_char msgin [8];
u_int32 lastmsg;
/*
** Buffer for STATUS_IN phase.
*/
u_char scratch;
/*
** controller chip dependent maximal transfer width.
*/
u_char maxwide;
/*
** option for M_IDENTIFY message: enables disconnecting
*/
u_char disc;
/*
** address of the ncr control registers in io space
*/
u_int port;
/*
** irq level
*/
u_short irq;
};
#define NCB_SCRIPT_PHYS(np,lbl) (np->p_script + offsetof (struct script, lbl))
#define NCB_SCRIPTH_PHYS(np,lbl) (np->p_scripth + offsetof (struct scripth, lbl))
/*==========================================================
**
**
** Script for NCR-Processor.
**
** Use ncr_script_fill() to create the variable parts.
** Use ncr_script_copy_and_bind() to make a copy and
** bind to physical addresses.
**
**
**==========================================================
**
** We have to know the offsets of all labels before
** we reach them (for forward jumps).
** Therefore we declare a struct here.
** If you make changes inside the script,
** DON'T FORGET TO CHANGE THE LENGTHS HERE!
**
**----------------------------------------------------------
*/
/*
** Script fragments which are loaded into the on-board RAM
** of 825A, 875 and 895 chips.
*/
struct script {
ncrcmd start [ 4];
ncrcmd start0 [ 2];
ncrcmd start1 [ 3];
ncrcmd startpos [ 1];
ncrcmd trysel [ 8];
ncrcmd skip [ 8];
ncrcmd skip2 [ 3];
ncrcmd idle [ 2];
ncrcmd select [ 22];
ncrcmd prepare [ 4];
ncrcmd loadpos [ 14];
ncrcmd prepare2 [ 24];
ncrcmd setmsg [ 5];
ncrcmd clrack [ 2];
ncrcmd dispatch [ 38];
ncrcmd no_data [ 17];
ncrcmd checkatn [ 10];
ncrcmd command [ 15];
ncrcmd status [ 27];
ncrcmd msg_in [ 26];
ncrcmd msg_bad [ 6];
ncrcmd complete [ 13];
ncrcmd cleanup [ 12];
ncrcmd cleanup0 [ 11];
ncrcmd signal [ 10];
ncrcmd save_dp [ 5];
ncrcmd restore_dp [ 5];
ncrcmd disconnect [ 12];
ncrcmd disconnect0 [ 5];
ncrcmd disconnect1 [ 23];
ncrcmd msg_out [ 9];
ncrcmd msg_out_done [ 7];
ncrcmd badgetcc [ 6];
ncrcmd reselect [ 8];
ncrcmd reselect1 [ 8];
ncrcmd reselect2 [ 8];
ncrcmd resel_tmp [ 5];
ncrcmd resel_lun [ 18];
ncrcmd resel_tag [ 24];
ncrcmd data_io [ 6];
ncrcmd data_in [MAX_SCATTER * 4 + 4];
};
/*
** Script fragments which stay in main memory for all chips.
*/
struct scripth {
ncrcmd tryloop [MAX_START*5+2];
ncrcmd msg_parity [ 6];
ncrcmd msg_reject [ 8];
ncrcmd msg_ign_residue [ 32];
ncrcmd msg_extended [ 18];
ncrcmd msg_ext_2 [ 18];
ncrcmd msg_wdtr [ 27];
ncrcmd msg_ext_3 [ 18];
ncrcmd msg_sdtr [ 27];
ncrcmd msg_out_abort [ 10];
ncrcmd getcc [ 4];
ncrcmd getcc1 [ 5];
#ifdef NCR_GETCC_WITHMSG
ncrcmd getcc2 [ 33];
#else
ncrcmd getcc2 [ 14];
#endif
ncrcmd getcc3 [ 10];
ncrcmd data_out [MAX_SCATTER * 4 + 4];
ncrcmd aborttag [ 4];
ncrcmd abort [ 22];
ncrcmd snooptest [ 9];
ncrcmd snoopend [ 2];
};
/*==========================================================
**
**
** Function headers.
**
**
**==========================================================
*/
static void ncr_alloc_ccb (ncb_p np, u_long t, u_long l);
static void ncr_complete (ncb_p np, ccb_p cp);
static void ncr_exception (ncb_p np);
static void ncr_free_ccb (ncb_p np, ccb_p cp, u_long t, u_long l);
static void ncr_getclock (ncb_p np, int mult);
static void ncr_selectclock (ncb_p np, u_char scntl3);
static ccb_p ncr_get_ccb (ncb_p np, u_long t,u_long l);
static void ncr_init (ncb_p np, int reset, char * msg, u_long code);
static int ncr_int_sbmc (ncb_p np);
static int ncr_int_par (ncb_p np);
static void ncr_int_ma (ncb_p np);
static void ncr_int_sir (ncb_p np);
static void ncr_int_sto (ncb_p np);
static u_long ncr_lookup (char* id);
static void ncr_negotiate (struct ncb* np, struct tcb* tp);
static void ncr_opennings (ncb_p np, lcb_p lp, Scsi_Cmnd * xp);
#ifdef SCSI_NCR_PROFILE_SUPPORT
static void ncb_profile (ncb_p np, ccb_p cp);
#endif
static void ncr_script_copy_and_bind
(ncb_p np, ncrcmd *src, ncrcmd *dst, int len);
static void ncr_script_fill (struct script * scr, struct scripth * scripth);
static int ncr_scatter (ccb_p cp, Scsi_Cmnd *cmd);
static void ncr_setmaxtags (ncb_p np, tcb_p tp, u_long numtags);
static void ncr_getsync (ncb_p np, u_char sfac, u_char *fakp, u_char *scntl3p);
static void ncr_setsync (ncb_p np, ccb_p cp, u_char scntl3, u_char sxfer);
static void ncr_settags (tcb_p tp, lcb_p lp);
static void ncr_setwide (ncb_p np, ccb_p cp, u_char wide, u_char ack);
static int ncr_show_msg (u_char * msg);
static int ncr_snooptest (ncb_p np);
static void ncr_timeout (ncb_p np);
static void ncr_wakeup (ncb_p np, u_long code);
static void ncr_start_reset (ncb_p np, int settle_delay);
static int ncr_reset_scsi_bus (ncb_p np, int enab_int, int settle_delay);
#ifdef SCSI_NCR_USER_COMMAND_SUPPORT
static void ncr_usercmd (ncb_p np);
#endif
static int ncr_attach (Scsi_Host_Template *tpnt, int unit, ncr_device *device);
static void insert_into_waiting_list(ncb_p np, Scsi_Cmnd *cmd);
static Scsi_Cmnd *retrieve_from_waiting_list(int to_remove, ncb_p np, Scsi_Cmnd *cmd);
static void process_waiting_list(ncb_p np, int sts);
#define remove_from_waiting_list(np, cmd) \
retrieve_from_waiting_list(1, (np), (cmd))
#define requeue_waiting_list(np) process_waiting_list((np), DID_OK)
#define reset_waiting_list(np) process_waiting_list((np), DID_RESET)
#ifdef SCSI_NCR_NVRAM_SUPPORT
static int ncr_get_Symbios_nvram (ncr_slot *np, Symbios_nvram *nvram);
static int ncr_get_Tekram_nvram (ncr_slot *np, Tekram_nvram *nvram);
#endif
/*==========================================================
**
**
** Global static data.
**
**
**==========================================================
*/
#ifdef SCSI_NCR_DEBUG_INFO_SUPPORT
static int ncr_debug = SCSI_NCR_DEBUG_FLAGS;
#endif
static inline char *ncr_name (ncb_p np)
{
return np->inst_name;
}
/*==========================================================
**
**
** Scripts for NCR-Processor.
**
** Use ncr_script_bind for binding to physical addresses.
**
**
**==========================================================
**
** NADDR generates a reference to a field of the controller data.
** PADDR generates a reference to another part of the script.
** RADDR generates a reference to a script processor register.
** FADDR generates a reference to a script processor register
** with offset.
**
**----------------------------------------------------------
*/
#define RELOC_SOFTC 0x40000000
#define RELOC_LABEL 0x50000000
#define RELOC_REGISTER 0x60000000
#define RELOC_KVAR 0x70000000
#define RELOC_LABELH 0x80000000
#define RELOC_MASK 0xf0000000
#define NADDR(label) (RELOC_SOFTC | offsetof(struct ncb, label))
#define PADDR(label) (RELOC_LABEL | offsetof(struct script, label))
#define PADDRH(label) (RELOC_LABELH | offsetof(struct scripth, label))
#define RADDR(label) (RELOC_REGISTER | REG(label))
#define FADDR(label,ofs)(RELOC_REGISTER | ((REG(label))+(ofs)))
#define KVAR(which) (RELOC_KVAR | (which))
#define SCRIPT_KVAR_JIFFIES (0)
#define SCRIPT_KVAR_FIRST SCRIPT_KVAR_JIFFIES
#define SCRIPT_KVAR_LAST SCRIPT_KVAR_JIFFIES
/*
* Kernel variables referenced in the scripts.
* THESE MUST ALL BE ALIGNED TO A 4-BYTE BOUNDARY.
*/
static void *script_kvars[] __initdata =
{ (void *)&jiffies };
static struct script script0 __initdata = {
/*--------------------------< START >-----------------------*/ {
#if 0
/*
** Claim to be still alive ...
*/
SCR_COPY (sizeof (((struct ncb *)0)->heartbeat)),
KVAR(SCRIPT_KVAR_JIFFIES),
NADDR (heartbeat),
#endif
/*
** Make data structure address invalid.
** clear SIGP.
*/
SCR_LOAD_REG (dsa, 0xff),
0,
SCR_FROM_REG (ctest2),
0,
}/*-------------------------< START0 >----------------------*/,{
/*
** Hook for interrupted GetConditionCode.
** Will be patched to ... IFTRUE by
** the interrupt handler.
*/
SCR_INT ^ IFFALSE (0),
SIR_SENSE_RESTART,
}/*-------------------------< START1 >----------------------*/,{
/*
** Hook for stalled start queue.
** Will be patched to IFTRUE by the interrupt handler.
*/
SCR_INT ^ IFFALSE (0),
SIR_STALL_RESTART,
/*
** Then jump to a certain point in tryloop.
** Due to the lack of indirect addressing the code
** is self modifying here.
*/
SCR_JUMP,
}/*-------------------------< STARTPOS >--------------------*/,{
PADDRH(tryloop),
}/*-------------------------< TRYSEL >----------------------*/,{
/*
** Now:
** DSA: Address of a Data Structure
** or Address of the IDLE-Label.
**
** TEMP: Address of a script, which tries to
** start the NEXT entry.
**
** Save the TEMP register into the SCRATCHA register.
** Then copy the DSA to TEMP and RETURN.
** This is kind of an indirect jump.
** (The script processor has NO stack, so the
** CALL is actually a jump and link, and the
** RETURN is an indirect jump.)
**
** If the slot was empty, DSA contains the address
** of the IDLE part of this script. The processor
** jumps to IDLE and waits for a reselect.
** It will wake up and try the same slot again
** after the SIGP bit becomes set by the host.
**
** If the slot was not empty, DSA contains
** the address of the phys-part of a ccb.
** The processor jumps to this address.
** phys starts with head,
** head starts with launch,
** so actually the processor jumps to
** the lauch part.
** If the entry is scheduled for execution,
** then launch contains a jump to SELECT.
** If it's not scheduled, it contains a jump to IDLE.
*/
SCR_COPY (4),
RADDR (temp),
RADDR (scratcha),
SCR_COPY (4),
RADDR (dsa),
RADDR (temp),
SCR_RETURN,
0
}/*-------------------------< SKIP >------------------------*/,{
/*
** This entry has been canceled.
** Next time use the next slot.
*/
SCR_COPY (4),
RADDR (scratcha),
PADDR (startpos),
/*
** patch the launch field.
** should look like an idle process.
*/
SCR_COPY_F (4),
RADDR (dsa),
PADDR (skip2),
SCR_COPY (8),
PADDR (idle),
}/*-------------------------< SKIP2 >-----------------------*/,{
0,
SCR_JUMP,
PADDR(start),
}/*-------------------------< IDLE >------------------------*/,{
/*
** Nothing to do?
** Wait for reselect.
*/
SCR_JUMP,
PADDR(reselect),
}/*-------------------------< SELECT >----------------------*/,{
/*
** DSA contains the address of a scheduled
** data structure.
**
** SCRATCHA contains the address of the script,
** which starts the next entry.
**
** Set Initiator mode.
**
** (Target mode is left as an exercise for the reader)
*/
SCR_CLR (SCR_TRG),
0,
SCR_LOAD_REG (HS_REG, 0xff),
0,
/*
** And try to select this target.
*/
SCR_SEL_TBL_ATN ^ offsetof (struct dsb, select),
PADDR (reselect),
/*
** Now there are 4 possibilities:
**
** (1) The ncr looses arbitration.
** This is ok, because it will try again,
** when the bus becomes idle.
** (But beware of the timeout function!)
**
** (2) The ncr is reselected.
** Then the script processor takes the jump
** to the RESELECT label.
**
** (3) The ncr completes the selection.
** Then it will execute the next statement.
**
** (4) There is a selection timeout.
** Then the ncr should interrupt the host and stop.
** Unfortunately, it seems to continue execution
** of the script. But it will fail with an
** IID-interrupt on the next WHEN.
*/
SCR_JUMPR ^ IFTRUE (WHEN (SCR_MSG_IN)),
0,
/*
** Save target id to ctest0 register
*/
SCR_FROM_REG (sdid),
0,
SCR_TO_REG (ctest0),
0,
/*
** Send the IDENTIFY and SIMPLE_TAG messages
** (and the M_X_SYNC_REQ message)
*/
SCR_MOVE_TBL ^ SCR_MSG_OUT,
offsetof (struct dsb, smsg),
#ifdef undef /* XXX better fail than try to deal with this ... */
SCR_JUMPR ^ IFTRUE (WHEN (SCR_MSG_OUT)),
-16,
#endif
SCR_CLR (SCR_ATN),
0,
SCR_COPY (1),
RADDR (sfbr),
NADDR (lastmsg),
/*
** Selection complete.
** Next time use the next slot.
*/
SCR_COPY (4),
RADDR (scratcha),
PADDR (startpos),
}/*-------------------------< PREPARE >----------------------*/,{
/*
** The ncr doesn't have an indirect load
** or store command. So we have to
** copy part of the control block to a
** fixed place, where we can access it.
**
** We patch the address part of a
** COPY command with the DSA-register.
*/
SCR_COPY_F (4),
RADDR (dsa),
PADDR (loadpos),
/*
** then we do the actual copy.
*/
SCR_COPY (sizeof (struct head)),
/*
** continued after the next label ...
*/
}/*-------------------------< LOADPOS >---------------------*/,{
0,
NADDR (header),
/*
** Mark this ccb as not scheduled.
*/
SCR_COPY (8),
PADDR (idle),
NADDR (header.launch),
/*
** Set a time stamp for this selection
*/
SCR_COPY (sizeof (u_long)),
KVAR(SCRIPT_KVAR_JIFFIES),
NADDR (header.stamp.select),
/*
** load the savep (saved pointer) into
** the TEMP register (actual pointer)
*/
SCR_COPY (4),
NADDR (header.savep),
RADDR (temp),
/*
** Initialize the status registers
*/
SCR_COPY (4),
NADDR (header.status),
RADDR (scr0),
}/*-------------------------< PREPARE2 >---------------------*/,{
/*
** Load the synchronous mode register
*/
SCR_COPY (1),
NADDR (sync_st),
RADDR (sxfer),
/*
** Load the wide mode and timing register
*/
SCR_COPY (1),
NADDR (wide_st),
RADDR (scntl3),
/*
** Initialize the msgout buffer with a NOOP message.
*/
SCR_LOAD_REG (scratcha, M_NOOP),
0,
SCR_COPY (1),
RADDR (scratcha),
NADDR (msgout),
SCR_COPY (1),
RADDR (scratcha),
NADDR (msgin),
/*
** Message in phase ?
*/
SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_IN)),
PADDR (dispatch),
/*
** Extended or reject message ?
*/
SCR_FROM_REG (sbdl),
0,
SCR_JUMP ^ IFTRUE (DATA (M_EXTENDED)),
PADDR (msg_in),
SCR_JUMP ^ IFTRUE (DATA (M_REJECT)),
PADDRH (msg_reject),
/*
** normal processing
*/
SCR_JUMP,
PADDR (dispatch),
}/*-------------------------< SETMSG >----------------------*/,{
SCR_COPY (1),
RADDR (scratcha),
NADDR (msgout),
SCR_SET (SCR_ATN),
0,
}/*-------------------------< CLRACK >----------------------*/,{
/*
** Terminate possible pending message phase.
*/
SCR_CLR (SCR_ACK),
0,
}/*-----------------------< DISPATCH >----------------------*/,{
SCR_FROM_REG (HS_REG),
0,
SCR_INT ^ IFTRUE (DATA (HS_NEGOTIATE)),
SIR_NEGO_FAILED,
/*
** remove bogus output signals
*/
SCR_REG_REG (socl, SCR_AND, CACK|CATN),
0,
SCR_RETURN ^ IFTRUE (WHEN (SCR_DATA_OUT)),
0,
/*
** DEL 397 - 53C875 Rev 3 - Part Number 609-0392410 - ITEM 4.
** Possible data corruption during Memory Write and Invalidate.
** This work-around resets the addressing logic prior to the
** start of the first MOVE of a DATA IN phase.
** (See README.ncr53c8xx for more information)
*/
SCR_JUMPR ^ IFFALSE (IF (SCR_DATA_IN)),
20,
SCR_COPY (4),
RADDR (scratcha),
RADDR (scratcha),
SCR_RETURN,
0,
SCR_JUMP ^ IFTRUE (IF (SCR_MSG_OUT)),
PADDR (msg_out),
SCR_JUMP ^ IFTRUE (IF (SCR_MSG_IN)),
PADDR (msg_in),
SCR_JUMP ^ IFTRUE (IF (SCR_COMMAND)),
PADDR (command),
SCR_JUMP ^ IFTRUE (IF (SCR_STATUS)),
PADDR (status),
/*
** Discard one illegal phase byte, if required.
*/
SCR_LOAD_REG (scratcha, XE_BAD_PHASE),
0,
SCR_COPY (1),
RADDR (scratcha),
NADDR (xerr_st),
SCR_JUMPR ^ IFFALSE (IF (SCR_ILG_OUT)),
8,
SCR_MOVE_ABS (1) ^ SCR_ILG_OUT,
NADDR (scratch),
SCR_JUMPR ^ IFFALSE (IF (SCR_ILG_IN)),
8,
SCR_MOVE_ABS (1) ^ SCR_ILG_IN,
NADDR (scratch),
SCR_JUMP,
PADDR (dispatch),
}/*-------------------------< NO_DATA >--------------------*/,{
/*
** The target wants to tranfer too much data
** or in the wrong direction.
** Remember that in extended error.
*/
SCR_LOAD_REG (scratcha, XE_EXTRA_DATA),
0,
SCR_COPY (1),
RADDR (scratcha),
NADDR (xerr_st),
/*
** Discard one data byte, if required.
*/
SCR_JUMPR ^ IFFALSE (WHEN (SCR_DATA_OUT)),
8,
SCR_MOVE_ABS (1) ^ SCR_DATA_OUT,
NADDR (scratch),
SCR_JUMPR ^ IFFALSE (IF (SCR_DATA_IN)),
8,
SCR_MOVE_ABS (1) ^ SCR_DATA_IN,
NADDR (scratch),
/*
** .. and repeat as required.
*/
SCR_CALL,
PADDR (dispatch),
SCR_JUMP,
PADDR (no_data),
}/*-------------------------< CHECKATN >--------------------*/,{
/*
** If AAP (bit 1 of scntl0 register) is set
** and a parity error is detected,
** the script processor asserts ATN.
**
** The target should switch to a MSG_OUT phase
** to get the message.
*/
SCR_FROM_REG (socl),
0,
SCR_JUMP ^ IFFALSE (MASK (CATN, CATN)),
PADDR (dispatch),
/*
** count it
*/
SCR_REG_REG (PS_REG, SCR_ADD, 1),
0,
/*
** Prepare a M_ID_ERROR message
** (initiator detected error).
** The target should retry the transfer.
*/
SCR_LOAD_REG (scratcha, M_ID_ERROR),
0,
SCR_JUMP,
PADDR (setmsg),
}/*-------------------------< COMMAND >--------------------*/,{
/*
** If this is not a GETCC transfer ...
*/
SCR_FROM_REG (SS_REG),
0,
/*<<<*/ SCR_JUMPR ^ IFTRUE (DATA (S_CHECK_COND)),
28,
/*
** ... set a timestamp ...
*/
SCR_COPY (sizeof (u_long)),
KVAR(SCRIPT_KVAR_JIFFIES),
NADDR (header.stamp.command),
/*
** ... and send the command
*/
SCR_MOVE_TBL ^ SCR_COMMAND,
offsetof (struct dsb, cmd),
SCR_JUMP,
PADDR (dispatch),
/*
** Send the GETCC command
*/
/*>>>*/ SCR_MOVE_TBL ^ SCR_COMMAND,
offsetof (struct dsb, scmd),
SCR_JUMP,
PADDR (dispatch),
}/*-------------------------< STATUS >--------------------*/,{
/*
** set the timestamp.
*/
SCR_COPY (sizeof (u_long)),
KVAR(SCRIPT_KVAR_JIFFIES),
NADDR (header.stamp.status),
/*
** If this is a GETCC transfer,
*/
SCR_FROM_REG (SS_REG),
0,
/*<<<*/ SCR_JUMPR ^ IFFALSE (DATA (S_CHECK_COND)),
40,
/*
** get the status
*/
SCR_MOVE_ABS (1) ^ SCR_STATUS,
NADDR (scratch),
/*
** Save status to scsi_status.
** Mark as complete.
** And wait for disconnect.
*/
SCR_TO_REG (SS_REG),
0,
SCR_REG_REG (SS_REG, SCR_OR, S_SENSE),
0,
SCR_LOAD_REG (HS_REG, HS_COMPLETE),
0,
SCR_JUMP,
PADDR (checkatn),
/*
** If it was no GETCC transfer,
** save the status to scsi_status.
*/
/*>>>*/ SCR_MOVE_ABS (1) ^ SCR_STATUS,
NADDR (scratch),
SCR_TO_REG (SS_REG),
0,
/*
** if it was no check condition ...
*/
SCR_JUMP ^ IFTRUE (DATA (S_CHECK_COND)),
PADDR (checkatn),
/*
** ... mark as complete.
*/
SCR_LOAD_REG (HS_REG, HS_COMPLETE),
0,
SCR_JUMP,
PADDR (checkatn),
}/*-------------------------< MSG_IN >--------------------*/,{
/*
** Get the first byte of the message
** and save it to SCRATCHA.
**
** The script processor doesn't negate the
** ACK signal after this transfer.
*/
SCR_MOVE_ABS (1) ^ SCR_MSG_IN,
NADDR (msgin[0]),
/*
** Check for message parity error.
*/
SCR_TO_REG (scratcha),
0,
SCR_FROM_REG (socl),
0,
SCR_JUMP ^ IFTRUE (MASK (CATN, CATN)),
PADDRH (msg_parity),
SCR_FROM_REG (scratcha),
0,
/*
** Parity was ok, handle this message.
*/
SCR_JUMP ^ IFTRUE (DATA (M_COMPLETE)),
PADDR (complete),
SCR_JUMP ^ IFTRUE (DATA (M_SAVE_DP)),
PADDR (save_dp),
SCR_JUMP ^ IFTRUE (DATA (M_RESTORE_DP)),
PADDR (restore_dp),
SCR_JUMP ^ IFTRUE (DATA (M_DISCONNECT)),
PADDR (disconnect),
SCR_JUMP ^ IFTRUE (DATA (M_EXTENDED)),
PADDRH (msg_extended),
SCR_JUMP ^ IFTRUE (DATA (M_NOOP)),
PADDR (clrack),
SCR_JUMP ^ IFTRUE (DATA (M_REJECT)),
PADDRH (msg_reject),
SCR_JUMP ^ IFTRUE (DATA (M_IGN_RESIDUE)),
PADDRH (msg_ign_residue),
/*
** Rest of the messages left as
** an exercise ...
**
** Unimplemented messages:
** fall through to MSG_BAD.
*/
}/*-------------------------< MSG_BAD >------------------*/,{
/*
** unimplemented message - reject it.
*/
SCR_INT,
SIR_REJECT_SENT,
SCR_LOAD_REG (scratcha, M_REJECT),
0,
SCR_JUMP,
PADDR (setmsg),
}/*-------------------------< COMPLETE >-----------------*/,{
/*
** Complete message.
**
** If it's not the get condition code,
** copy TEMP register to LASTP in header.
*/
SCR_FROM_REG (SS_REG),
0,
/*<<<*/ SCR_JUMPR ^ IFTRUE (MASK (S_SENSE, S_SENSE)),
12,
SCR_COPY (4),
RADDR (temp),
NADDR (header.lastp),
/*>>>*/ /*
** When we terminate the cycle by clearing ACK,
** the target may disconnect immediately.
**
** We don't want to be told of an
** "unexpected disconnect",
** so we disable this feature.
*/
SCR_REG_REG (scntl2, SCR_AND, 0x7f),
0,
/*
** Terminate cycle ...
*/
SCR_CLR (SCR_ACK|SCR_ATN),
0,
/*
** ... and wait for the disconnect.
*/
SCR_WAIT_DISC,
0,
}/*-------------------------< CLEANUP >-------------------*/,{
/*
** dsa: Pointer to ccb
** or xxxxxxFF (no ccb)
**
** HS_REG: Host-Status (<>0!)
*/
SCR_FROM_REG (dsa),
0,
SCR_JUMP ^ IFTRUE (DATA (0xff)),
PADDR (signal),
/*
** dsa is valid.
** save the status registers
*/
SCR_COPY (4),
RADDR (scr0),
NADDR (header.status),
/*
** and copy back the header to the ccb.
*/
SCR_COPY_F (4),
RADDR (dsa),
PADDR (cleanup0),
SCR_COPY (sizeof (struct head)),
NADDR (header),
}/*-------------------------< CLEANUP0 >--------------------*/,{
0,
/*
** If command resulted in "check condition"
** status and is not yet completed,
** try to get the condition code.
*/
SCR_FROM_REG (HS_REG),
0,
/*<<<*/ SCR_JUMPR ^ IFFALSE (MASK (0, HS_DONEMASK)),
16,
SCR_FROM_REG (SS_REG),
0,
SCR_JUMP ^ IFTRUE (DATA (S_CHECK_COND)),
PADDRH(getcc2),
/*
** And make the DSA register invalid.
*/
/*>>>*/ SCR_LOAD_REG (dsa, 0xff), /* invalid */
0,
}/*-------------------------< SIGNAL >----------------------*/,{
/*
** if status = queue full,
** reinsert in startqueue and stall queue.
*/
SCR_FROM_REG (SS_REG),
0,
SCR_INT ^ IFTRUE (DATA (S_QUEUE_FULL)),
SIR_STALL_QUEUE,
/*
** if job completed ...
*/
SCR_FROM_REG (HS_REG),
0,
/*
** ... signal completion to the host
*/
SCR_INT_FLY ^ IFFALSE (MASK (0, HS_DONEMASK)),
0,
/*
** Auf zu neuen Schandtaten!
*/
SCR_JUMP,
PADDR(start),
}/*-------------------------< SAVE_DP >------------------*/,{
/*
** SAVE_DP message:
** Copy TEMP register to SAVEP in header.
*/
SCR_COPY (4),
RADDR (temp),
NADDR (header.savep),
SCR_JUMP,
PADDR (clrack),
}/*-------------------------< RESTORE_DP >---------------*/,{
/*
** RESTORE_DP message:
** Copy SAVEP in header to TEMP register.
*/
SCR_COPY (4),
NADDR (header.savep),
RADDR (temp),
SCR_JUMP,
PADDR (clrack),
}/*-------------------------< DISCONNECT >---------------*/,{
/*
** If QUIRK_AUTOSAVE is set,
** do an "save pointer" operation.
*/
SCR_FROM_REG (QU_REG),
0,
/*<<<*/ SCR_JUMPR ^ IFFALSE (MASK (QUIRK_AUTOSAVE, QUIRK_AUTOSAVE)),
12,
/*
** like SAVE_DP message:
** Copy TEMP register to SAVEP in header.
*/
SCR_COPY (4),
RADDR (temp),
NADDR (header.savep),
/*>>>*/ /*
** Check if temp==savep or temp==goalp:
** if not, log a missing save pointer message.
** In fact, it's a comparison mod 256.
**
** Hmmm, I hadn't thought that I would be urged to
** write this kind of ugly self modifying code.
**
** It's unbelievable, but the ncr53c8xx isn't able
** to subtract one register from another.
*/
SCR_FROM_REG (temp),
0,
/*
** You are not expected to understand this ..
**
** CAUTION: only little endian architectures supported! XXX
*/
SCR_COPY_F (1),
NADDR (header.savep),
PADDR (disconnect0),
}/*-------------------------< DISCONNECT0 >--------------*/,{
/*<<<*/ SCR_JUMPR ^ IFTRUE (DATA (1)),
20,
/*
** neither this
*/
SCR_COPY_F (1),
NADDR (header.goalp),
PADDR (disconnect1),
}/*-------------------------< DISCONNECT1 >--------------*/,{
SCR_INT ^ IFFALSE (DATA (1)),
SIR_MISSING_SAVE,
/*>>>*/
/*
** DISCONNECTing ...
**
** disable the "unexpected disconnect" feature,
** and remove the ACK signal.
*/
SCR_REG_REG (scntl2, SCR_AND, 0x7f),
0,
SCR_CLR (SCR_ACK|SCR_ATN),
0,
/*
** Wait for the disconnect.
*/
SCR_WAIT_DISC,
0,
/*
** Profiling:
** Set a time stamp,
** and count the disconnects.
*/
SCR_COPY (sizeof (u_long)),
KVAR(SCRIPT_KVAR_JIFFIES),
NADDR (header.stamp.disconnect),
SCR_COPY (4),
NADDR (disc_phys),
RADDR (temp),
SCR_REG_REG (temp, SCR_ADD, 0x01),
0,
SCR_COPY (4),
RADDR (temp),
NADDR (disc_phys),
/*
** Status is: DISCONNECTED.
*/
SCR_LOAD_REG (HS_REG, HS_DISCONNECT),
0,
SCR_JUMP,
PADDR (cleanup),
}/*-------------------------< MSG_OUT >-------------------*/,{
/*
** The target requests a message.
*/
SCR_MOVE_ABS (1) ^ SCR_MSG_OUT,
NADDR (msgout),
SCR_COPY (1),
RADDR (sfbr),
NADDR (lastmsg),
/*
** If it was no ABORT message ...
*/
SCR_JUMP ^ IFTRUE (DATA (M_ABORT)),
PADDRH (msg_out_abort),
/*
** ... wait for the next phase
** if it's a message out, send it again, ...
*/
SCR_JUMP ^ IFTRUE (WHEN (SCR_MSG_OUT)),
PADDR (msg_out),
}/*-------------------------< MSG_OUT_DONE >--------------*/,{
/*
** ... else clear the message ...
*/
SCR_LOAD_REG (scratcha, M_NOOP),
0,
SCR_COPY (4),
RADDR (scratcha),
NADDR (msgout),
/*
** ... and process the next phase
*/
SCR_JUMP,
PADDR (dispatch),
}/*------------------------< BADGETCC >---------------------*/,{
/*
** If SIGP was set, clear it and try again.
*/
SCR_FROM_REG (ctest2),
0,
SCR_JUMP ^ IFTRUE (MASK (CSIGP,CSIGP)),
PADDRH (getcc2),
SCR_INT,
SIR_SENSE_FAILED,
}/*-------------------------< RESELECT >--------------------*/,{
/*
** This NOP will be patched with LED OFF
** SCR_REG_REG (gpreg, SCR_OR, 0x01)
*/
SCR_NO_OP,
0,
/*
** make the DSA invalid.
*/
SCR_LOAD_REG (dsa, 0xff),
0,
SCR_CLR (SCR_TRG),
0,
/*
** Sleep waiting for a reselection.
** If SIGP is set, special treatment.
**
** Zu allem bereit ..
*/
SCR_WAIT_RESEL,
PADDR(reselect2),
}/*-------------------------< RESELECT1 >--------------------*/,{
/*
** This NOP will be patched with LED ON
** SCR_REG_REG (gpreg, SCR_AND, 0xfe)
*/
SCR_NO_OP,
0,
/*
** ... zu nichts zu gebrauchen ?
**
** load the target id into the SFBR
** and jump to the control block.
**
** Look at the declarations of
** - struct ncb
** - struct tcb
** - struct lcb
** - struct ccb
** to understand what's going on.
*/
SCR_REG_SFBR (ssid, SCR_AND, 0x8F),
0,
SCR_TO_REG (ctest0),
0,
SCR_JUMP,
NADDR (jump_tcb),
}/*-------------------------< RESELECT2 >-------------------*/,{
/*
** This NOP will be patched with LED ON
** SCR_REG_REG (gpreg, SCR_AND, 0xfe)
*/
SCR_NO_OP,
0,
/*
** If it's not connected :(
** -> interrupted by SIGP bit.
** Jump to start.
*/
SCR_FROM_REG (ctest2),
0,
SCR_JUMP ^ IFTRUE (MASK (CSIGP,CSIGP)),
PADDR (start),
SCR_JUMP,
PADDR (reselect),
}/*-------------------------< RESEL_TMP >-------------------*/,{
/*
** The return address in TEMP
** is in fact the data structure address,
** so copy it to the DSA register.
*/
SCR_COPY (4),
RADDR (temp),
RADDR (dsa),
SCR_JUMP,
PADDR (prepare),
}/*-------------------------< RESEL_LUN >-------------------*/,{
/*
** come back to this point
** to get an IDENTIFY message
** Wait for a msg_in phase.
*/
/*<<<*/ SCR_JUMPR ^ IFFALSE (WHEN (SCR_MSG_IN)),
48,
/*
** message phase
** It's not a sony, it's a trick:
** read the data without acknowledging it.
*/
SCR_FROM_REG (sbdl),
0,
/*<<<*/ SCR_JUMPR ^ IFFALSE (MASK (M_IDENTIFY, 0x98)),
32,
/*
** It WAS an Identify message.
** get it and ack it!
*/
SCR_MOVE_ABS (1) ^ SCR_MSG_IN,
NADDR (msgin),
SCR_CLR (SCR_ACK),
0,
/*
** Mask out the lun.
*/
SCR_REG_REG (sfbr, SCR_AND, 0x07),
0,
SCR_RETURN,
0,
/*
** No message phase or no IDENTIFY message:
** return 0.
*/
/*>>>*/ SCR_LOAD_SFBR (0),
0,
SCR_RETURN,
0,
}/*-------------------------< RESEL_TAG >-------------------*/,{
/*
** come back to this point
** to get a SIMPLE_TAG message
** Wait for a MSG_IN phase.
*/
/*<<<*/ SCR_JUMPR ^ IFFALSE (WHEN (SCR_MSG_IN)),
64,
/*
** message phase
** It's a trick - read the data
** without acknowledging it.
*/
SCR_FROM_REG (sbdl),
0,
/*<<<*/ SCR_JUMPR ^ IFFALSE (DATA (M_SIMPLE_TAG)),
48,
/*
** It WAS a SIMPLE_TAG message.
** get it and ack it!
*/
SCR_MOVE_ABS (1) ^ SCR_MSG_IN,
NADDR (msgin),
SCR_CLR (SCR_ACK),
0,
/*
** Wait for the second byte (the tag)
*/
/*<<<*/ SCR_JUMPR ^ IFFALSE (WHEN (SCR_MSG_IN)),
24,
/*
** Get it and ack it!
*/
SCR_MOVE_ABS (1) ^ SCR_MSG_IN,
NADDR (msgin),
SCR_CLR (SCR_ACK|SCR_CARRY),
0,
SCR_RETURN,
0,
/*
** No message phase or no SIMPLE_TAG message
** or no second byte: return 0.
*/
/*>>>*/ SCR_LOAD_SFBR (0),
0,
SCR_SET (SCR_CARRY),
0,
SCR_RETURN,
0,
}/*-------------------------< DATA_IO >--------------------*/,{
/*
** Because Linux does not provide xfer data direction
** to low-level scsi drivers, we must trust the target
** for actual data direction when we cannot guess it.
** The programmed interrupt patches savep, lastp, goalp,
** etc.., and restarts the scsi script at data_out/in.
*/
SCR_INT ^ IFTRUE (WHEN (SCR_DATA_OUT)),
SIR_DATA_IO_IS_OUT,
SCR_INT ^ IFTRUE (WHEN (SCR_DATA_IN)),
SIR_DATA_IO_IS_IN,
SCR_JUMP,
PADDR (no_data),
}/*-------------------------< DATA_IN >--------------------*/,{
/*
** Because the size depends on the
** #define MAX_SCATTER parameter,
** it is filled in at runtime.
**
** ##===========< i=0; i<MAX_SCATTER >=========
** || SCR_CALL ^ IFFALSE (WHEN (SCR_DATA_IN)),
** || PADDR (checkatn),
** || SCR_MOVE_TBL ^ SCR_DATA_IN,
** || offsetof (struct dsb, data[ i]),
** ##==========================================
**
** SCR_CALL,
** PADDR (checkatn),
** SCR_JUMP,
** PADDR (no_data),
*/
0
}/*--------------------------------------------------------*/
};
static struct scripth scripth0 __initdata = {
/*-------------------------< TRYLOOP >---------------------*/{
/*
** Load an entry of the start queue into dsa
** and try to start it by jumping to TRYSEL.
**
** Because the size depends on the
** #define MAX_START parameter, it is filled
** in at runtime.
**
**-----------------------------------------------------------
**
** ##===========< I=0; i<MAX_START >===========
** || SCR_COPY (4),
** || NADDR (squeue[i]),
** || RADDR (dsa),
** || SCR_CALL,
** || PADDR (trysel),
** ##==========================================
**
** SCR_JUMP,
** PADDRH(tryloop),
**
**-----------------------------------------------------------
*/
0
},/*-------------------------< MSG_PARITY >---------------*/{
/*
** count it
*/
SCR_REG_REG (PS_REG, SCR_ADD, 0x01),
0,
/*
** send a "message parity error" message.
*/
SCR_LOAD_REG (scratcha, M_PARITY),
0,
SCR_JUMP,
PADDR (setmsg),
}/*-------------------------< MSG_REJECT >---------------*/,{
/*
** If a negotiation was in progress,
** negotiation failed.
*/
SCR_FROM_REG (HS_REG),
0,
SCR_INT ^ IFTRUE (DATA (HS_NEGOTIATE)),
SIR_NEGO_FAILED,
/*
** else make host log this message
*/
SCR_INT ^ IFFALSE (DATA (HS_NEGOTIATE)),
SIR_REJECT_RECEIVED,
SCR_JUMP,
PADDR (clrack),
}/*-------------------------< MSG_IGN_RESIDUE >----------*/,{
/*
** Terminate cycle
*/
SCR_CLR (SCR_ACK),
0,
SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_IN)),
PADDR (dispatch),
/*
** get residue size.
*/
SCR_MOVE_ABS (1) ^ SCR_MSG_IN,
NADDR (msgin[1]),
/*
** Check for message parity error.
*/
SCR_TO_REG (scratcha),
0,
SCR_FROM_REG (socl),
0,
SCR_JUMP ^ IFTRUE (MASK (CATN, CATN)),
PADDRH (msg_parity),
SCR_FROM_REG (scratcha),
0,
/*
** Size is 0 .. ignore message.
*/
SCR_JUMP ^ IFTRUE (DATA (0)),
PADDR (clrack),
/*
** Size is not 1 .. have to interrupt.
*/
/*<<<*/ SCR_JUMPR ^ IFFALSE (DATA (1)),
40,
/*
** Check for residue byte in swide register
*/
SCR_FROM_REG (scntl2),
0,
/*<<<*/ SCR_JUMPR ^ IFFALSE (MASK (WSR, WSR)),
16,
/*
** There IS data in the swide register.
** Discard it.
*/
SCR_REG_REG (scntl2, SCR_OR, WSR),
0,
SCR_JUMP,
PADDR (clrack),
/*
** Load again the size to the sfbr register.
*/
/*>>>*/ SCR_FROM_REG (scratcha),
0,
/*>>>*/ SCR_INT,
SIR_IGN_RESIDUE,
SCR_JUMP,
PADDR (clrack),
}/*-------------------------< MSG_EXTENDED >-------------*/,{
/*
** Terminate cycle
*/
SCR_CLR (SCR_ACK),
0,
SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_IN)),
PADDR (dispatch),
/*
** get length.
*/
SCR_MOVE_ABS (1) ^ SCR_MSG_IN,
NADDR (msgin[1]),
/*
** Check for message parity error.
*/
SCR_TO_REG (scratcha),
0,
SCR_FROM_REG (socl),
0,
SCR_JUMP ^ IFTRUE (MASK (CATN, CATN)),
PADDRH (msg_parity),
SCR_FROM_REG (scratcha),
0,
/*
*/
SCR_JUMP ^ IFTRUE (DATA (3)),
PADDRH (msg_ext_3),
SCR_JUMP ^ IFFALSE (DATA (2)),
PADDR (msg_bad),
}/*-------------------------< MSG_EXT_2 >----------------*/,{
SCR_CLR (SCR_ACK),
0,
SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_IN)),
PADDR (dispatch),
/*
** get extended message code.
*/
SCR_MOVE_ABS (1) ^ SCR_MSG_IN,
NADDR (msgin[2]),
/*
** Check for message parity error.
*/
SCR_TO_REG (scratcha),
0,
SCR_FROM_REG (socl),
0,
SCR_JUMP ^ IFTRUE (MASK (CATN, CATN)),
PADDRH (msg_parity),
SCR_FROM_REG (scratcha),
0,
SCR_JUMP ^ IFTRUE (DATA (M_X_WIDE_REQ)),
PADDRH (msg_wdtr),
/*
** unknown extended message
*/
SCR_JUMP,
PADDR (msg_bad)
}/*-------------------------< MSG_WDTR >-----------------*/,{
SCR_CLR (SCR_ACK),
0,
SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_IN)),
PADDR (dispatch),
/*
** get data bus width
*/
SCR_MOVE_ABS (1) ^ SCR_MSG_IN,
NADDR (msgin[3]),
SCR_FROM_REG (socl),
0,
SCR_JUMP ^ IFTRUE (MASK (CATN, CATN)),
PADDRH (msg_parity),
/*
** let the host do the real work.
*/
SCR_INT,
SIR_NEGO_WIDE,
/*
** let the target fetch our answer.
*/
SCR_SET (SCR_ATN),
0,
SCR_CLR (SCR_ACK),
0,
SCR_INT ^ IFFALSE (WHEN (SCR_MSG_OUT)),
SIR_NEGO_PROTO,
/*
** Send the M_X_WIDE_REQ
*/
SCR_MOVE_ABS (4) ^ SCR_MSG_OUT,
NADDR (msgout),
SCR_CLR (SCR_ATN),
0,
SCR_COPY (1),
RADDR (sfbr),
NADDR (lastmsg),
SCR_JUMP,
PADDR (msg_out_done),
}/*-------------------------< MSG_EXT_3 >----------------*/,{
SCR_CLR (SCR_ACK),
0,
SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_IN)),
PADDR (dispatch),
/*
** get extended message code.
*/
SCR_MOVE_ABS (1) ^ SCR_MSG_IN,
NADDR (msgin[2]),
/*
** Check for message parity error.
*/
SCR_TO_REG (scratcha),
0,
SCR_FROM_REG (socl),
0,
SCR_JUMP ^ IFTRUE (MASK (CATN, CATN)),
PADDRH (msg_parity),
SCR_FROM_REG (scratcha),
0,
SCR_JUMP ^ IFTRUE (DATA (M_X_SYNC_REQ)),
PADDRH (msg_sdtr),
/*
** unknown extended message
*/
SCR_JUMP,
PADDR (msg_bad)
}/*-------------------------< MSG_SDTR >-----------------*/,{
SCR_CLR (SCR_ACK),
0,
SCR_JUMP ^ IFFALSE (WHEN (SCR_MSG_IN)),
PADDR (dispatch),
/*
** get period and offset
*/
SCR_MOVE_ABS (2) ^ SCR_MSG_IN,
NADDR (msgin[3]),
SCR_FROM_REG (socl),
0,
SCR_JUMP ^ IFTRUE (MASK (CATN, CATN)),
PADDRH (msg_parity),
/*
** let the host do the real work.
*/
SCR_INT,
SIR_NEGO_SYNC,
/*
** let the target fetch our answer.
*/
SCR_SET (SCR_ATN),
0,
SCR_CLR (SCR_ACK),
0,
SCR_INT ^ IFFALSE (WHEN (SCR_MSG_OUT)),
SIR_NEGO_PROTO,
/*
** Send the M_X_SYNC_REQ
*/
SCR_MOVE_ABS (5) ^ SCR_MSG_OUT,
NADDR (msgout),
SCR_CLR (SCR_ATN),
0,
SCR_COPY (1),
RADDR (sfbr),
NADDR (lastmsg),
SCR_JUMP,
PADDR (msg_out_done),
}/*-------------------------< MSG_OUT_ABORT >-------------*/,{
/*
** After ABORT message,
**
** expect an immediate disconnect, ...
*/
SCR_REG_REG (scntl2, SCR_AND, 0x7f),
0,
SCR_CLR (SCR_ACK|SCR_ATN),
0,
SCR_WAIT_DISC,
0,
/*
** ... and set the status to "ABORTED"
*/
SCR_LOAD_REG (HS_REG, HS_ABORTED),
0,
SCR_JUMP,
PADDR (cleanup),
}/*-------------------------< GETCC >-----------------------*/,{
/*
** The ncr doesn't have an indirect load
** or store command. So we have to
** copy part of the control block to a
** fixed place, where we can modify it.
**
** We patch the address part of a COPY command
** with the address of the dsa register ...
*/
SCR_COPY_F (4),
RADDR (dsa),
PADDRH (getcc1),
/*
** ... then we do the actual copy.
*/
SCR_COPY (sizeof (struct head)),
}/*-------------------------< GETCC1 >----------------------*/,{
0,
NADDR (header),
/*
** Initialize the status registers
*/
SCR_COPY (4),
NADDR (header.status),
RADDR (scr0),
}/*-------------------------< GETCC2 >----------------------*/,{
/*
** Get the condition code from a target.
**
** DSA points to a data structure.
** Set TEMP to the script location
** that receives the condition code.
**
** Because there is no script command
** to load a longword into a register,
** we use a CALL command.
*/
/*<<<*/ SCR_CALLR,
24,
/*
** Get the condition code.
*/
SCR_MOVE_TBL ^ SCR_DATA_IN,
offsetof (struct dsb, sense),
/*
** No data phase may follow!
*/
SCR_CALL,
PADDR (checkatn),
SCR_JUMP,
PADDR (no_data),
/*>>>*/
/*
** The CALL jumps to this point.
** Prepare for a RESTORE_POINTER message.
** Save the TEMP register into the saved pointer.
*/
SCR_COPY (4),
RADDR (temp),
NADDR (header.savep),
/*
** Load scratcha, because in case of a selection timeout,
** the host will expect a new value for startpos in
** the scratcha register.
*/
SCR_COPY (4),
PADDR (startpos),
RADDR (scratcha),
#ifdef NCR_GETCC_WITHMSG
/*
** If QUIRK_NOMSG is set, select without ATN.
** and don't send a message.
*/
SCR_FROM_REG (QU_REG),
0,
SCR_JUMP ^ IFTRUE (MASK (QUIRK_NOMSG, QUIRK_NOMSG)),
PADDRH(getcc3),
/*
** Then try to connect to the target.
** If we are reselected, special treatment
** of the current job is required before
** accepting the reselection.
*/
SCR_SEL_TBL_ATN ^ offsetof (struct dsb, select),
PADDR(badgetcc),
/*
** save target id.
*/
SCR_FROM_REG (sdid),
0,
SCR_TO_REG (ctest0),
0,
/*
** Send the IDENTIFY message.
** In case of short transfer, remove ATN.
*/
SCR_MOVE_TBL ^ SCR_MSG_OUT,
offsetof (struct dsb, smsg2),
SCR_CLR (SCR_ATN),
0,
/*
** save the first byte of the message.
*/
SCR_COPY (1),
RADDR (sfbr),
NADDR (lastmsg),
SCR_JUMP,
PADDR (prepare2),
#endif
}/*-------------------------< GETCC3 >----------------------*/,{
/*
** Try to connect to the target.
** If we are reselected, special treatment
** of the current job is required before
** accepting the reselection.
**
** Silly target won't accept a message.
** Select without ATN.
*/
SCR_SEL_TBL ^ offsetof (struct dsb, select),
PADDR(badgetcc),
/*
** save target id.
*/
SCR_FROM_REG (sdid),
0,
SCR_TO_REG (ctest0),
0,
/*
** Force error if selection timeout
*/
SCR_JUMPR ^ IFTRUE (WHEN (SCR_MSG_IN)),
0,
/*
** don't negotiate.
*/
SCR_JUMP,
PADDR (prepare2),
}/*-------------------------< DATA_OUT >-------------------*/,{
/*
** Because the size depends on the
** #define MAX_SCATTER parameter,
** it is filled in at runtime.
**
** ##===========< i=0; i<MAX_SCATTER >=========
** || SCR_CALL ^ IFFALSE (WHEN (SCR_DATA_OUT)),
** || PADDR (dispatch),
** || SCR_MOVE_TBL ^ SCR_DATA_OUT,
** || offsetof (struct dsb, data[ i]),
** ##==========================================
**
** SCR_CALL,
** PADDR (dispatch),
** SCR_JUMP,
** PADDR (no_data),
**
**---------------------------------------------------------
*/
0
}/*-------------------------< ABORTTAG >-------------------*/,{
/*
** Abort a bad reselection.
** Set the message to ABORT vs. ABORT_TAG
*/
SCR_LOAD_REG (scratcha, M_ABORT_TAG),
0,
SCR_JUMPR ^ IFFALSE (CARRYSET),
8,
}/*-------------------------< ABORT >----------------------*/,{
SCR_LOAD_REG (scratcha, M_ABORT),
0,
SCR_COPY (1),
RADDR (scratcha),
NADDR (msgout),
SCR_SET (SCR_ATN),
0,
SCR_CLR (SCR_ACK),
0,
/*
** and send it.
** we expect an immediate disconnect
*/
SCR_REG_REG (scntl2, SCR_AND, 0x7f),
0,
SCR_MOVE_ABS (1) ^ SCR_MSG_OUT,
NADDR (msgout),
SCR_COPY (1),
RADDR (sfbr),
NADDR (lastmsg),
SCR_CLR (SCR_ACK|SCR_ATN),
0,
SCR_WAIT_DISC,
0,
SCR_JUMP,
PADDR (start),
}/*-------------------------< SNOOPTEST >-------------------*/,{
/*
** Read the variable.
*/
SCR_COPY (4),
NADDR(ncr_cache),
RADDR (scratcha),
/*
** Write the variable.
*/
SCR_COPY (4),
RADDR (temp),
NADDR(ncr_cache),
/*
** Read back the variable.
*/
SCR_COPY (4),
NADDR(ncr_cache),
RADDR (temp),
}/*-------------------------< SNOOPEND >-------------------*/,{
/*
** And stop.
*/
SCR_INT,
99,
}/*--------------------------------------------------------*/
};
/*==========================================================
**
**
** Fill in #define dependent parts of the script
**
**
**==========================================================
*/
__initfunc(
void ncr_script_fill (struct script * scr, struct scripth * scrh)
)
{
int i;
ncrcmd *p;
p = scrh->tryloop;
for (i=0; i<MAX_START; i++) {
*p++ =SCR_COPY (4);
*p++ =NADDR (squeue[i]);
*p++ =RADDR (dsa);
*p++ =SCR_CALL;
*p++ =PADDR (trysel);
};
*p++ =SCR_JUMP;
*p++ =PADDRH(tryloop);
assert ((u_long)p == (u_long)&scrh->tryloop + sizeof (scrh->tryloop));
p = scr->data_in;
for (i=0; i<MAX_SCATTER; i++) {
*p++ =SCR_CALL ^ IFFALSE (WHEN (SCR_DATA_IN));
*p++ =PADDR (checkatn);
*p++ =SCR_MOVE_TBL ^ SCR_DATA_IN;
*p++ =offsetof (struct dsb, data[i]);
};
*p++ =SCR_CALL;
*p++ =PADDR (checkatn);
*p++ =SCR_JUMP;
*p++ =PADDR (no_data);
assert ((u_long)p == (u_long)&scr->data_in + sizeof (scr->data_in));
p = scrh->data_out;
for (i=0; i<MAX_SCATTER; i++) {
*p++ =SCR_CALL ^ IFFALSE (WHEN (SCR_DATA_OUT));
*p++ =PADDR (dispatch);
*p++ =SCR_MOVE_TBL ^ SCR_DATA_OUT;
*p++ =offsetof (struct dsb, data[i]);
};
*p++ =SCR_CALL;
*p++ =PADDR (dispatch);
*p++ =SCR_JUMP;
*p++ =PADDR (no_data);
assert ((u_long)p == (u_long)&scrh->data_out + sizeof (scrh->data_out));
}
/*==========================================================
**
**
** Copy and rebind a script.
**
**
**==========================================================
*/
__initfunc(
static void ncr_script_copy_and_bind (ncb_p np, ncrcmd *src, ncrcmd *dst, int len)
)
{
ncrcmd opcode, new, old, tmp1, tmp2;
ncrcmd *start, *end;
int relocs;
int opchanged = 0;
start = src;
end = src + len/4;
while (src < end) {
opcode = *src++;
*dst++ = cpu_to_scr(opcode);
/*
** If we forget to change the length
** in struct script, a field will be
** padded with 0. This is an illegal
** command.
*/
if (opcode == 0) {
printf ("%s: ERROR0 IN SCRIPT at %d.\n",
ncr_name(np), (int) (src-start-1));
DELAY (1000000);
};
if (DEBUG_FLAGS & DEBUG_SCRIPT)
printf ("%p: <%x>\n",
(src-1), (unsigned)opcode);
/*
** We don't have to decode ALL commands
*/
switch (opcode >> 28) {
case 0xc:
/*
** COPY has TWO arguments.
*/
relocs = 2;
tmp1 = src[0];
if ((tmp1 & RELOC_MASK) == RELOC_KVAR)
tmp1 = 0;
tmp2 = src[1];
if ((tmp2 & RELOC_MASK) == RELOC_KVAR)
tmp2 = 0;
if ((tmp1 ^ tmp2) & 3) {
printf ("%s: ERROR1 IN SCRIPT at %d.\n",
ncr_name(np), (int) (src-start-1));
DELAY (1000000);
}
/*
** If PREFETCH feature not enabled, remove
** the NO FLUSH bit if present.
*/
if ((opcode & SCR_NO_FLUSH) && !(np->features & FE_PFEN)) {
dst[-1] = cpu_to_scr(opcode & ~SCR_NO_FLUSH);
++opchanged;
}
break;
case 0x0:
/*
** MOVE (absolute address)
*/
relocs = 1;
break;
case 0x8:
/*
** JUMP / CALL
** don't relocate if relative :-)
*/
if (opcode & 0x00800000)
relocs = 0;
else
relocs = 1;
break;
case 0x4:
case 0x5:
case 0x6:
case 0x7:
relocs = 1;
break;
default:
relocs = 0;
break;
};
if (relocs) {
while (relocs--) {
old = *src++;
switch (old & RELOC_MASK) {
case RELOC_REGISTER:
new = (old & ~RELOC_MASK) + np->paddr;
break;
case RELOC_LABEL:
new = (old & ~RELOC_MASK) + np->p_script;
break;
case RELOC_LABELH:
new = (old & ~RELOC_MASK) + np->p_scripth;
break;
case RELOC_SOFTC:
new = (old & ~RELOC_MASK) + vtophys(np);
break;
case RELOC_KVAR:
if (((old & ~RELOC_MASK) <
SCRIPT_KVAR_FIRST) ||
((old & ~RELOC_MASK) >
SCRIPT_KVAR_LAST))
panic("ncr KVAR out of range");
new = vtophys(script_kvars[old &
~RELOC_MASK]);
break;
case 0:
/* Don't relocate a 0 address. */
if (old == 0) {
new = old;
break;
}
/* fall through */
default:
panic("ncr_script_copy_and_bind: weird relocation %x\n", old);
break;
}
*dst++ = cpu_to_scr(new);
}
} else
*dst++ = cpu_to_scr(*src++);
};
if (bootverbose > 1 && opchanged)
printf("%s: NO FLUSH bit removed from %d script instructions\n",
ncr_name(np), opchanged);
}
/*==========================================================
**
**
** Auto configuration: attach and init a host adapter.
**
**
**==========================================================
*/
/*
** Linux host data structure
**
** The script area is allocated in the host data structure
** because kmalloc() returns NULL during scsi initialisations
** with Linux 1.2.X
*/
struct host_data {
struct ncb *ncb;
char ncb_align[NCB_ALIGN_SIZE-1]; /* Filler for alignment */
struct ncb _ncb_data;
char ccb_align[CCB_ALIGN_SIZE-1]; /* Filler for alignment */
struct ccb _ccb_data;
char scr_align[SCR_ALIGN_SIZE-1]; /* Filler for alignment */
struct script script_data;
struct scripth scripth_data;
};
/*
** Print something which allow to retrieve the controler type, unit,
** target, lun concerned by a kernel message.
*/
#define PRINT_LUN(np, target, lun) \
printf(KERN_INFO "%s-<%d,%d>: ", ncr_name(np), (int) (target), (int) (lun))
static void PRINT_ADDR(Scsi_Cmnd *cmd)
{
struct host_data *host_data = (struct host_data *) cmd->host->hostdata;
ncb_p np = host_data->ncb;
if (np) PRINT_LUN(np, cmd->target, cmd->lun);
}
/*==========================================================
**
** NCR chip clock divisor table.
** Divisors are multiplied by 10,000,000 in order to make
** calculations more simple.
**
**==========================================================
*/
#define _5M 5000000
static u_long div_10M[] =
{2*_5M, 3*_5M, 4*_5M, 6*_5M, 8*_5M, 12*_5M, 16*_5M};
/*===============================================================
**
** Prepare io register values used by ncr_init() according
** to selected and supported features.
**
** NCR chips allow burst lengths of 2, 4, 8, 16, 32, 64, 128
** transfers. 32,64,128 are only supported by 875 and 895 chips.
** We use log base 2 (burst length) as internal code, with
** value 0 meaning "burst disabled".
**
**===============================================================
*/
/*
* Burst length from burst code.
*/
#define burst_length(bc) (!(bc))? 0 : 1 << (bc)
/*
* Burst code from io register bits.
*/
#define burst_code(dmode, ctest4, ctest5) \
(ctest4) & 0x80? 0 : (((dmode) & 0xc0) >> 6) + ((ctest5) & 0x04) + 1
/*
* Set initial io register bits from burst code.
*/
static inline void ncr_init_burst(ncb_p np, u_char bc)
{
np->rv_ctest4 &= ~0x80;
np->rv_dmode &= ~(0x3 << 6);
np->rv_ctest5 &= ~0x4;
if (!bc) {
np->rv_ctest4 |= 0x80;
}
else {
--bc;
np->rv_dmode |= ((bc & 0x3) << 6);
np->rv_ctest5 |= (bc & 0x4);
}
}
#ifdef SCSI_NCR_NVRAM_SUPPORT
/*
** Get target set-up from Symbios format NVRAM.
*/
__initfunc(
static void
ncr_Symbios_setup_target(ncb_p np, int target, Symbios_nvram *nvram)
)
{
tcb_p tp = &np->target[target];
Symbios_target *tn = &nvram->target[target];
tp->usrsync = tn->sync_period ? (tn->sync_period + 3) / 4 : 255;
tp->usrwide = tn->bus_width == 0x10 ? 1 : 0;
tp->usrtags =
(tn->flags & SYMBIOS_QUEUE_TAGS_ENABLED)? SCSI_NCR_MAX_TAGS : 0;
if (!(tn->flags & SYMBIOS_DISCONNECT_ENABLE))
tp->usrflag |= UF_NODISC;
if (!(tn->flags & SYMBIOS_SCAN_AT_BOOT_TIME))
tp->usrflag |= UF_NOSCAN;
}
/*
** Get target set-up from Tekram format NVRAM.
*/
__initfunc(
static void
ncr_Tekram_setup_target(ncb_p np, int target, Tekram_nvram *nvram)
)
{
tcb_p tp = &np->target[target];
struct Tekram_target *tn = &nvram->target[target];
int i;
if (tn->flags & TEKRAM_SYNC_NEGO) {
i = tn->sync_index & 0xf;
tp->usrsync = i < 12 ? Tekram_sync[i] : 255;
}
tp->usrwide = (tn->flags & TEKRAM_WIDE_NEGO) ? 1 : 0;
if (tn->flags & TEKRAM_TAGGED_COMMANDS) {
tp->usrtags = 2 << nvram->max_tags_index;
if (tp->usrtags > SCSI_NCR_MAX_TAGS)
tp->usrtags = SCSI_NCR_MAX_TAGS;
}
if (!(tn->flags & TEKRAM_DISCONNECT_ENABLE))
tp->usrflag = UF_NODISC;
/* If any device does not support parity, we will not use this option */
if (!(tn->flags & TEKRAM_PARITY_CHECK))
np->rv_scntl0 &= ~0x0a; /* SCSI parity checking disabled */
}
#endif /* SCSI_NCR_NVRAM_SUPPORT */
__initfunc(
static int ncr_prepare_setting(ncb_p np, ncr_nvram *nvram)
)
{
u_char burst_max;
u_long period;
int i;
/*
** Save assumed BIOS setting
*/
np->sv_scntl0 = INB(nc_scntl0) & 0x0a;
np->sv_scntl3 = INB(nc_scntl3) & 0x07;
np->sv_dmode = INB(nc_dmode) & 0xce;
np->sv_dcntl = INB(nc_dcntl) & 0xa8;
np->sv_ctest3 = INB(nc_ctest3) & 0x01;
np->sv_ctest4 = INB(nc_ctest4) & 0x80;
np->sv_ctest5 = INB(nc_ctest5) & 0x24;
np->sv_gpcntl = INB(nc_gpcntl);
np->sv_stest2 = INB(nc_stest2) & 0x20;
np->sv_stest4 = INB(nc_stest4);
/*
** Wide ?
*/
np->maxwide = (np->features & FE_WIDE)? 1 : 0;
/*
** Get the frequency of the chip's clock.
** Find the right value for scntl3.
*/
if (np->features & FE_QUAD)
np->multiplier = 4;
else if (np->features & FE_DBLR)
np->multiplier = 2;
else
np->multiplier = 1;
np->clock_khz = (np->features & FE_CLK80)? 80000 : 40000;
np->clock_khz *= np->multiplier;
if (np->clock_khz != 40000)
ncr_getclock(np, np->multiplier);
/*
* Divisor to be used for async (timer pre-scaler).
*/
i = np->clock_divn - 1;
while (i >= 0) {
--i;
if (10ul * SCSI_NCR_MIN_ASYNC * np->clock_khz > div_10M[i]) {
++i;
break;
}
}
np->rv_scntl3 = i+1;
/*
* Minimum synchronous period factor supported by the chip.
* Btw, 'period' is in tenths of nanoseconds.
*/
period = (4 * div_10M[0] + np->clock_khz - 1) / np->clock_khz;
if (period <= 250) np->minsync = 10;
else if (period <= 303) np->minsync = 11;
else if (period <= 500) np->minsync = 12;
else np->minsync = (period + 40 - 1) / 40;
/*
* Check against chip SCSI standard support (SCSI-2,ULTRA,ULTRA2).
*/
if (np->minsync < 25 && !(np->features & (FE_ULTRA|FE_ULTRA2)))
np->minsync = 25;
else if (np->minsync < 12 && !(np->features & FE_ULTRA2))
np->minsync = 12;
/*
* Maximum synchronous period factor supported by the chip.
*/
period = (11 * div_10M[np->clock_divn - 1]) / (4 * np->clock_khz);
np->maxsync = period > 2540 ? 254 : period / 10;
/*
** Prepare initial value of other IO registers
*/
#if defined SCSI_NCR_TRUST_BIOS_SETTING
np->rv_scntl0 = np->sv_scntl0;
np->rv_dmode = np->sv_dmode;
np->rv_dcntl = np->sv_dcntl;
np->rv_ctest3 = np->sv_ctest3;
np->rv_ctest4 = np->sv_ctest4;
np->rv_ctest5 = np->sv_ctest5;
burst_max = burst_code(np->sv_dmode, np->sv_ctest4, np->sv_ctest5);
#else
/*
** Select burst length (dwords)
*/
burst_max = driver_setup.burst_max;
if (burst_max == 255)
burst_max = burst_code(np->sv_dmode, np->sv_ctest4, np->sv_ctest5);
if (burst_max > 7)
burst_max = 7;
if (burst_max > np->maxburst)
burst_max = np->maxburst;
/*
** Select all supported special features
*/
if (np->features & FE_ERL)
np->rv_dmode |= ERL; /* Enable Read Line */
if (np->features & FE_BOF)
np->rv_dmode |= BOF; /* Burst Opcode Fetch */
if (np->features & FE_ERMP)
np->rv_dmode |= ERMP; /* Enable Read Multiple */
if (np->features & FE_PFEN)
np->rv_dcntl |= PFEN; /* Prefetch Enable */
if (np->features & FE_CLSE)
np->rv_dcntl |= CLSE; /* Cache Line Size Enable */
if (np->features & FE_WRIE)
np->rv_ctest3 |= WRIE; /* Write and Invalidate */
if (np->features & FE_DFS)
np->rv_ctest5 |= DFS; /* Dma Fifo Size */
/*
** Select some other
*/
if (driver_setup.master_parity)
np->rv_ctest4 |= MPEE; /* Master parity checking */
if (driver_setup.scsi_parity)
np->rv_scntl0 |= 0x0a; /* full arb., ena parity, par->ATN */
#ifdef SCSI_NCR_NVRAM_SUPPORT
/*
** Get parity checking, host ID and verbose mode from NVRAM
**/
if (nvram) {
switch(nvram->type) {
case SCSI_NCR_TEKRAM_NVRAM:
np->myaddr = nvram->data.Tekram.host_id & 0x0f;
break;
case SCSI_NCR_SYMBIOS_NVRAM:
if (!(nvram->data.Symbios.flags & SYMBIOS_PARITY_ENABLE))
np->rv_scntl0 &= ~0x0a;
np->myaddr = nvram->data.Symbios.host_id & 0x0f;
if (nvram->data.Symbios.flags & SYMBIOS_VERBOSE_MSGS)
np->verbose += 1;
break;
}
}
#endif
/*
** Get SCSI addr of host adapter (set by bios?).
*/
if (!np->myaddr) np->myaddr = INB(nc_scid) & 0x07;
if (!np->myaddr) np->myaddr = SCSI_NCR_MYADDR;
#endif /* SCSI_NCR_TRUST_BIOS_SETTING */
/*
* Prepare initial io register bits for burst length
*/
ncr_init_burst(np, burst_max);
/*
** Set differential mode and LED support.
** Ignore these features for boards known to use a
** specific GPIO wiring (Tekram only for now).
** Probe initial setting of GPREG and GPCNTL for
** other ones.
*/
if (!nvram || nvram->type != SCSI_NCR_TEKRAM_NVRAM) {
switch(driver_setup.diff_support) {
case 3:
if (INB(nc_gpreg) & 0x08)
break;
case 2:
np->rv_stest2 |= 0x20;
break;
case 1:
np->rv_stest2 |= (np->sv_stest2 & 0x20);
break;
default:
break;
}
}
if ((driver_setup.led_pin ||
(nvram && nvram->type == SCSI_NCR_SYMBIOS_NVRAM)) &&
!(np->sv_gpcntl & 0x01))
np->features |= FE_LED0;
/*
** Set irq mode.
*/
switch(driver_setup.irqm) {
case 2:
np->rv_dcntl |= IRQM;
break;
case 1:
np->rv_dcntl |= (np->sv_dcntl & IRQM);
break;
default:
break;
}
/*
** Configure targets according to driver setup.
** If NVRAM present get targets setup from NVRAM.
** Allow to override sync, wide and NOSCAN from
** boot command line.
*/
for (i = 0 ; i < MAX_TARGET ; i++) {
tcb_p tp = &np->target[i];
tp->usrsync = 255;
#ifdef SCSI_NCR_NVRAM_SUPPORT
if (nvram) {
switch(nvram->type) {
case SCSI_NCR_TEKRAM_NVRAM:
ncr_Tekram_setup_target(np, i, &nvram->data.Tekram);
break;
case SCSI_NCR_SYMBIOS_NVRAM:
ncr_Symbios_setup_target(np, i, &nvram->data.Symbios);
break;
}
if (driver_setup.use_nvram & 0x2)
tp->usrsync = driver_setup.default_sync;
if (driver_setup.use_nvram & 0x4)
tp->usrwide = driver_setup.max_wide;
if (driver_setup.use_nvram & 0x8)
tp->usrflag &= ~UF_NOSCAN;
}
else {
#else
if (1) {
#endif
tp->usrsync = driver_setup.default_sync;
tp->usrwide = driver_setup.max_wide;
tp->usrtags = driver_setup.default_tags;
if (!driver_setup.disconnection)
np->target[i].usrflag = UF_NODISC;
}
}
/*
** Announce all that stuff to user.
*/
i = nvram ? nvram->type : 0;
printf(KERN_INFO "%s: %sID %d, Fast-%d%s%s\n", ncr_name(np),
i == SCSI_NCR_SYMBIOS_NVRAM ? "Symbios format NVRAM, " :
(i == SCSI_NCR_TEKRAM_NVRAM ? "Tekram format NVRAM, " : ""),
np->myaddr,
np->minsync < 12 ? 40 : (np->minsync < 25 ? 20 : 10),
(np->rv_scntl0 & 0xa) ? ", Parity Checking" : ", NO Parity",
(np->rv_stest2 & 0x20) ? ", Differential" : "");
if (bootverbose > 1) {
printf ("%s: initial SCNTL3/DMODE/DCNTL/CTEST3/4/5 = "
"(hex) %02x/%02x/%02x/%02x/%02x/%02x\n",
ncr_name(np), np->sv_scntl3, np->sv_dmode, np->sv_dcntl,
np->sv_ctest3, np->sv_ctest4, np->sv_ctest5);
printf ("%s: final SCNTL3/DMODE/DCNTL/CTEST3/4/5 = "
"(hex) %02x/%02x/%02x/%02x/%02x/%02x\n",
ncr_name(np), np->rv_scntl3, np->rv_dmode, np->rv_dcntl,
np->rv_ctest3, np->rv_ctest4, np->rv_ctest5);
}
if (bootverbose && np->paddr2)
printf (KERN_INFO "%s: on-board RAM at 0x%lx\n",
ncr_name(np), np->paddr2);
return 0;
}
#ifdef SCSI_NCR_DEBUG_NVRAM
__initfunc(
void ncr_display_Symbios_nvram(ncb_p np, Symbios_nvram *nvram)
)
{
int i;
/* display Symbios nvram host data */
printf("%s: HOST ID=%d%s%s%s%s\n",
ncr_name(np), nvram->host_id & 0x0f,
(nvram->flags & SYMBIOS_SCAM_ENABLE) ? " SCAM" :"",
(nvram->flags & SYMBIOS_PARITY_ENABLE) ? " PARITY" :"",
(nvram->flags & SYMBIOS_VERBOSE_MSGS) ? " VERSBOSE" :"",
(nvram->flags1 & SYMBIOS_SCAN_HI_LO) ? " HI_LO" :"");
/* display Symbios nvram drive data */
for (i = 0 ; i < 15 ; i++) {
struct Symbios_target *tn = &nvram->target[i];
printf("%s-%d:%s%s%s%s WIDTH=%d SYNC=%d TMO=%d\n",
ncr_name(np), i,
(tn->flags & SYMBIOS_DISCONNECT_ENABLE) ? " DISC" : "",
(tn->flags & SYMBIOS_SCAN_AT_BOOT_TIME) ? " SCAN_BOOT" : "",
(tn->flags & SYMBIOS_SCAN_LUNS) ? " SCAN_LUNS" : "",
(tn->flags & SYMBIOS_QUEUE_TAGS_ENABLED)? " TCQ" : "",
tn->bus_width,
tn->sync_period / 4,
tn->timeout);
}
}
static u_char Tekram_boot_delay[7] __initdata = {3, 5, 10, 20, 30, 60, 120};
__initfunc(
void ncr_display_Tekram_nvram(ncb_p np, Tekram_nvram *nvram)
)
{
int i, tags, boot_delay;
char *rem;
/* display Tekram nvram host data */
tags = 2 << nvram->max_tags_index;
boot_delay = 0;
if (nvram->boot_delay_index < 6)
boot_delay = Tekram_boot_delay[nvram->boot_delay_index];
switch((nvram->flags & TEKRAM_REMOVABLE_FLAGS) >> 6) {
default:
case 0: rem = ""; break;
case 1: rem = " REMOVABLE=boot device"; break;
case 2: rem = " REMOVABLE=all"; break;
}
printf("%s: HOST ID=%d%s%s%s%s%s%s%s%s%s BOOT DELAY=%d tags=%d\n",
ncr_name(np), nvram->host_id & 0x0f,
(nvram->flags1 & SYMBIOS_SCAM_ENABLE) ? " SCAM" :"",
(nvram->flags & TEKRAM_MORE_THAN_2_DRIVES) ? " >2DRIVES" :"",
(nvram->flags & TEKRAM_DRIVES_SUP_1GB) ? " >1GB" :"",
(nvram->flags & TEKRAM_RESET_ON_POWER_ON) ? " RESET" :"",
(nvram->flags & TEKRAM_ACTIVE_NEGATION) ? " ACT_NEG" :"",
(nvram->flags & TEKRAM_IMMEDIATE_SEEK) ? " IMM_SEEK" :"",
(nvram->flags & TEKRAM_SCAN_LUNS) ? " SCAN_LUNS" :"",
(nvram->flags1 & TEKRAM_F2_F6_ENABLED) ? " F2_F6" :"",
rem, boot_delay, tags);
/* display Tekram nvram drive data */
for (i = 0; i <= 15; i++) {
int sync, j;
struct Tekram_target *tn = &nvram->target[i];
j = tn->sync_index & 0xf;
sync = j < 12 ? Tekram_sync[j] : 255;
printf("%s-%d:%s%s%s%s%s%s PERIOD=%d\n",
ncr_name(np), i,
(tn->flags & TEKRAM_PARITY_CHECK) ? " PARITY" : "",
(tn->flags & TEKRAM_SYNC_NEGO) ? " SYNC" : "",
(tn->flags & TEKRAM_DISCONNECT_ENABLE) ? " DISC" : "",
(tn->flags & TEKRAM_START_CMD) ? " START" : "",
(tn->flags & TEKRAM_TAGGED_COMMANDS) ? " TCQ" : "",
(tn->flags & TEKRAM_WIDE_NEGO) ? " WIDE" : "",
sync);
}
}
#endif /* SCSI_NCR_DEBUG_NVRAM */
/*
** Host attach and initialisations.
**
** Allocate host data and ncb structure.
** Request IO region and remap MMIO region.
** Do chip initialization.
** If all is OK, install interrupt handling and
** start the timer daemon.
*/
__initfunc(
static int ncr_attach (Scsi_Host_Template *tpnt, int unit, ncr_device *device)
)
{
struct host_data *host_data;
ncb_p np;
struct Scsi_Host *instance = 0;
u_long flags = 0;
ncr_nvram *nvram = device->nvram;
printf(KERN_INFO "ncr53c%s-%d: rev=0x%02x, base=0x%x, io_port=0x%x, irq=%d\n",
device->chip.name, unit, device->chip.revision_id, device->slot.base,
device->slot.io_port, device->slot.irq);
/*
** Allocate host_data structure
*/
if (!(instance = scsi_register(tpnt, sizeof(*host_data))))
goto attach_error;
/*
** Initialize structure.
*/
host_data = (struct host_data *) instance->hostdata;
/*
** Align np and first ccb to 32 boundary for cache line
** bursting when copying the global header.
*/
np = (ncb_p) (((u_long) &host_data->_ncb_data) & NCB_ALIGN_MASK);
host_data->ncb = np;
bzero (np, sizeof (*np));
np->ccb = (ccb_p) (((u_long) &host_data->_ccb_data) & CCB_ALIGN_MASK);
bzero (np->ccb, sizeof (*np->ccb));
/*
** Store input informations in the host data structure.
*/
strncpy(np->chip_name, device->chip.name, sizeof(np->chip_name) - 1);
np->unit = unit;
np->verbose = driver_setup.verbose;
sprintf(np->inst_name, "ncr53c%s-%d", np->chip_name, np->unit);
np->device_id = device->chip.device_id;
np->revision_id = device->chip.revision_id;
np->features = device->chip.features;
np->clock_divn = device->chip.nr_divisor;
np->maxoffs = device->chip.offset_max;
np->maxburst = device->chip.burst_max;
np->script0 =
(struct script *) (((u_long) &host_data->script_data) & SCR_ALIGN_MASK);
np->scripth0 = &host_data->scripth_data;
/*
** Initialize timer structure
**
*/
init_timer(&np->timer);
np->timer.data = (unsigned long) np;
np->timer.function = ncr53c8xx_timeout;
/*
** Try to map the controller chip to
** virtual and physical memory.
*/
np->paddr = device->slot.base;
np->paddr2 = (np->features & FE_RAM)? device->slot.base_2 : 0;
#ifndef NCR_IOMAPPED
np->vaddr = remap_pci_mem((u_long) np->paddr, (u_long) 128);
if (!np->vaddr) {
printf("%s: can't map memory mapped IO region\n", ncr_name(np));
goto attach_error;
}
else
if (bootverbose > 1)
printf("%s: using memory mapped IO at virtual address 0x%lx\n", ncr_name(np), (u_long) np->vaddr);
/*
** Make the controller's registers available.
** Now the INB INW INL OUTB OUTW OUTL macros
** can be used safely.
*/
np->reg = (struct ncr_reg*) np->vaddr;
#endif /* !defined NCR_IOMAPPED */
/*
** Try to map the controller chip into iospace.
*/
request_region(device->slot.io_port, 128, "ncr53c8xx");
np->port = device->slot.io_port;
#ifdef SCSI_NCR_NVRAM_SUPPORT
if (nvram) {
switch(nvram->type) {
case SCSI_NCR_SYMBIOS_NVRAM:
#ifdef SCSI_NCR_DEBUG_NVRAM
ncr_display_Symbios_nvram(np, &nvram->data.Symbios);
#endif
break;
case SCSI_NCR_TEKRAM_NVRAM:
#ifdef SCSI_NCR_DEBUG_NVRAM
ncr_display_Tekram_nvram(np, &nvram->data.Tekram);
#endif
break;
default:
nvram = 0;
#ifdef SCSI_NCR_DEBUG_NVRAM
printf("%s: NVRAM: None or invalid data.\n", ncr_name(np));
#endif
}
}
#endif
/*
** Do chip dependent initialization.
*/
(void)ncr_prepare_setting(np, nvram);
#ifndef NCR_IOMAPPED
if (np->paddr2 && sizeof(struct script) <= 4096) {
np->vaddr2 = remap_pci_mem((u_long) np->paddr2, (u_long) 4096);
if (!np->vaddr2) {
printf("%s: can't map memory mapped IO region\n", ncr_name(np));
goto attach_error;
}
else
if (bootverbose > 1)
printf("%s: on-board ram mapped at virtual address 0x%lx\n", ncr_name(np), (u_long) np->vaddr2);
}
#endif /* !defined NCR_IOMAPPED */
/*
** Fill Linux host instance structure
*/
#if LINUX_VERSION_CODE >= LinuxVersionCode(1,3,0)
instance->max_channel = 0;
instance->max_id = np->maxwide ? 16 : 8;
instance->max_lun = SCSI_NCR_MAX_LUN;
#endif
#ifndef NCR_IOMAPPED
instance->base = (char *) np->reg;
#endif
instance->irq = device->slot.irq;
instance->io_port = device->slot.io_port;
instance->n_io_port = 128;
instance->dma_channel = 0;
#if LINUX_VERSION_CODE >= LinuxVersionCode(2,0,0)
instance->select_queue_depths = ncr53c8xx_select_queue_depths;
#endif
/*
** Patch script to physical addresses
*/
ncr_script_fill (&script0, &scripth0);
np->scripth = np->scripth0;
np->p_scripth = vtophys(np->scripth);
np->script = (np->vaddr2) ? (struct script *) np->vaddr2 : np->script0;
np->p_script = (np->vaddr2) ? np->paddr2 : vtophys(np->script0);
ncr_script_copy_and_bind (np, (ncrcmd *) &script0, (ncrcmd *) np->script0, sizeof(struct script));
ncr_script_copy_and_bind (np, (ncrcmd *) &scripth0, (ncrcmd *) np->scripth0, sizeof(struct scripth));
np->ccb->p_ccb = vtophys (np->ccb);
/*
** Patch the script for LED support.
*/
if (np->features & FE_LED0) {
np->script0->reselect[0] =
cpu_to_scr(SCR_REG_REG(gpreg, SCR_OR, 0x01));
np->script0->reselect1[0] =
cpu_to_scr(SCR_REG_REG(gpreg, SCR_AND, 0xfe));
np->script0->reselect2[0] =
cpu_to_scr(SCR_REG_REG(gpreg, SCR_AND, 0xfe));
}
/*
** init data structure
*/
np->jump_tcb.l_cmd = cpu_to_scr(SCR_JUMP);
np->jump_tcb.l_paddr = cpu_to_scr(NCB_SCRIPTH_PHYS (np, abort));
/*
** Reset chip.
*/
OUTB (nc_istat, SRST);
DELAY (1000);
OUTB (nc_istat, 0 );
/*
** Now check the cache handling of the pci chipset.
*/
if (ncr_snooptest (np)) {
printf ("CACHE INCORRECTLY CONFIGURED.\n");
goto attach_error;
};
/*
** Install the interrupt handler.
*/
#if LINUX_VERSION_CODE >= LinuxVersionCode(1,3,70)
#ifdef SCSI_NCR_SHARE_IRQ
if (bootverbose > 1)
printf("%s: requesting shared irq %d (dev_id=0x%lx)\n",
ncr_name(np), device->slot.irq, (u_long) np);
if (request_irq(device->slot.irq, ncr53c8xx_intr,
SA_INTERRUPT|SA_SHIRQ, "ncr53c8xx", np)) {
#else
if (request_irq(device->slot.irq, ncr53c8xx_intr,
SA_INTERRUPT, "ncr53c8xx", np)) {
#endif
#else
if (request_irq(device->slot.irq, ncr53c8xx_intr,
SA_INTERRUPT, "ncr53c8xx")) {
#endif
printf("%s: request irq %d failure\n", ncr_name(np), device->slot.irq);
goto attach_error;
}
np->irq = device->slot.irq;
/*
** After SCSI devices have been opened, we cannot
** reset the bus safely, so we do it here.
** Interrupt handler does the real work.
** Process the reset exception,
** if interrupts are not enabled yet.
** Then enable disconnects.
*/
save_flags(flags); cli();
if (ncr_reset_scsi_bus(np, 0, driver_setup.settle_delay) != 0) {
printf("%s: FATAL ERROR: CHECK SCSI BUS - CABLES, TERMINATION, DEVICE POWER etc.!\n", ncr_name(np));
restore_flags(flags);
goto attach_error;
}
ncr_exception (np);
restore_flags(flags);
np->disc = 1;
/*
** The middle-level SCSI driver does not
** wait devices to settle.
** Wait synchronously if more than 2 seconds.
*/
if (driver_setup.settle_delay > 2) {
printf("%s: waiting %d seconds for scsi devices to settle...\n",
ncr_name(np), driver_setup.settle_delay);
DELAY(1000000UL * driver_setup.settle_delay);
}
/*
** Now let the generic SCSI driver
** look for the SCSI devices on the bus ..
*/
/*
** start the timeout daemon
*/
np->lasttime=0;
ncr_timeout (np);
/*
** use SIMPLE TAG messages by default
*/
#ifdef SCSI_NCR_ALWAYS_SIMPLE_TAG
np->order = M_SIMPLE_TAG;
#endif
/*
** Done.
*/
if (!the_template) {
the_template = instance->hostt;
first_host = instance;
}
return 0;
attach_error:
if (!instance) return -1;
printf("%s: detaching...\n", ncr_name(np));
#ifndef NCR_IOMAPPED
if (np->vaddr) {
#ifdef DEBUG_NCR53C8XX
printf("%s: releasing memory mapped IO region %lx[%d]\n", ncr_name(np), (u_long) np->vaddr, 128);
#endif
unmap_pci_mem((vm_offset_t) np->vaddr, (u_long) 128);
}
if (np->vaddr2) {
#ifdef DEBUG_NCR53C8XX
printf("%s: releasing memory mapped IO region %lx[%d]\n", ncr_name(np), (u_long) np->vaddr2, 4096);
#endif
unmap_pci_mem((vm_offset_t) np->vaddr2, (u_long) 4096);
}
#endif
if (np->port) {
#ifdef DEBUG_NCR53C8XX
printf("%s: releasing IO region %x[%d]\n", ncr_name(np), np->port, 128);
#endif
release_region(np->port, 128);
}
if (np->irq) {
#ifdef DEBUG_NCR53C8XX
printf("%s: freeing irq %d\n", ncr_name(np), np->irq);
#endif
#if LINUX_VERSION_CODE >= LinuxVersionCode(1,3,70)
free_irq(np->irq, np);
#else
free_irq(np->irq);
#endif
}
scsi_unregister(instance);
return -1;
}
/*==========================================================
**
**
** Start execution of a SCSI command.
** This is called from the generic SCSI driver.
**
**
**==========================================================
*/
int ncr_queue_command (Scsi_Cmnd *cmd, void (* done)(Scsi_Cmnd *))
{
struct Scsi_Host *host = cmd->host;
/* Scsi_Device *device = cmd->device; */
struct host_data *host_data = (struct host_data *) host->hostdata;
ncb_p np = host_data->ncb;
tcb_p tp = &np->target[cmd->target];
ccb_p cp;
lcb_p lp;
int segments;
u_char qidx, nego, idmsg, *msgptr;
u_int msglen, msglen2;
u_long flags;
int xfer_direction;
cmd->scsi_done = done;
cmd->host_scribble = NULL;
cmd->SCp.ptr = NULL;
cmd->SCp.buffer = NULL;
/*---------------------------------------------
**
** Some shortcuts ...
**
**---------------------------------------------
*/
if ((cmd->target == np->myaddr ) ||
(cmd->target >= MAX_TARGET) ||
(cmd->lun >= MAX_LUN )) {
return(DID_BAD_TARGET);
}
/*---------------------------------------------
**
** Complete the 1st TEST UNIT READY command
** with error condition if the device is
** flagged NOSCAN, in order to speed up
** the boot.
**
**---------------------------------------------
*/
if (cmd->cmnd[0] == 0 && (tp->usrflag & UF_NOSCAN)) {
tp->usrflag &= ~UF_NOSCAN;
return DID_BAD_TARGET;
}
if (DEBUG_FLAGS & DEBUG_TINY) {
PRINT_ADDR(cmd);
printf ("CMD=%x ", cmd->cmnd[0]);
}
/*---------------------------------------------------
**
** Assign a ccb / bind cmd.
** If resetting, shorten settle_time if necessary
** in order to avoid spurious timeouts.
** If resetting or no free ccb,
** insert cmd into the waiting list.
**
**----------------------------------------------------
*/
save_flags(flags); cli();
if (np->settle_time && cmd->timeout_per_command >= HZ &&
np->settle_time > jiffies + cmd->timeout_per_command - HZ) {
np->settle_time = jiffies + cmd->timeout_per_command - HZ;
}
if (np->settle_time || !(cp=ncr_get_ccb (np, cmd->target, cmd->lun))) {
insert_into_waiting_list(np, cmd);
restore_flags(flags);
return(DID_OK);
}
cp->cmd = cmd;
/*---------------------------------------------------
**
** Enable tagged queue if asked by scsi ioctl
**
**----------------------------------------------------
*/
if (!tp->usrtags && cmd->device && cmd->device->tagged_queue) {
tp->usrtags = SCSI_NCR_MAX_TAGS;
ncr_setmaxtags (np, tp, SCSI_NCR_MAX_TAGS);
}
/*---------------------------------------------------
**
** timestamp
**
**----------------------------------------------------
*/
#ifdef SCSI_NCR_PROFILE_SUPPORT
bzero (&cp->phys.header.stamp, sizeof (struct tstamp));
cp->phys.header.stamp.start = jiffies;
#endif
/*----------------------------------------------------
**
** Get device quirks from a speciality table.
**
** @GENSCSI@
** This should be a part of the device table
** in "scsi_conf.c".
**
**----------------------------------------------------
*/
if (tp->quirks & QUIRK_UPDATE) {
tp->quirks = ncr_lookup ((char*) &tp->inqdata[0]);
#ifndef NCR_GETCC_WITHMSG
if (tp->quirks) {
PRINT_ADDR(cmd);
printf ("quirks=%x.\n", tp->quirks);
}
#endif
}
/*---------------------------------------------------
**
** negotiation required?
**
** Only SCSI-II devices.
** To negotiate with SCSI-I devices is dangerous, since
** Synchronous Negotiation protocol is optional, and
** INQUIRY data do not contains capabilities in byte 7.
**----------------------------------------------------
*/
nego = 0;
if (cmd->lun == 0 && !tp->nego_cp &&
(tp->inqdata[2] & 0x7) >= 2 && tp->inqdata[7]) {
/*
** negotiate wide transfers ?
*/
if (!tp->widedone) {
if (tp->inqdata[7] & INQ7_WIDE16) {
nego = NS_WIDE;
} else
tp->widedone=1;
};
/*
** negotiate synchronous transfers?
*/
if (!nego && !tp->period) {
if ( 1
#if defined (CDROM_ASYNC)
&& ((tp->inqdata[0] & 0x1f) != 5)
#endif
&& (tp->inqdata[7] & INQ7_SYNC)) {
nego = NS_SYNC;
} else {
tp->period =0xffff;
tp->sval = 0xe0;
PRINT_ADDR(cmd);
printf ("asynchronous.\n");
};
};
/*
** remember nego is pending for the target.
** Avoid to start a nego for all queued commands
** when tagged command queuing is enabled.
*/
if (nego)
tp->nego_cp = cp;
};
/*---------------------------------------------------
**
** choose a new tag ...
**
**----------------------------------------------------
*/
if ((lp = tp->lp[cmd->lun]) && (lp->usetags)) {
/*
** assign a tag to this ccb!
*/
while (!cp->tag) {
ccb_p cp2 = lp->next_ccb;
lp->lasttag = lp->lasttag % 255 + 1;
while (cp2 && cp2->tag != lp->lasttag)
cp2 = cp2->next_ccb;
if (cp2) continue;
cp->tag=lp->lasttag;
if (DEBUG_FLAGS & DEBUG_TAGS) {
PRINT_ADDR(cmd);
printf ("using tag #%d.\n", cp->tag);
}
}
} else {
cp->tag=0;
}
/*----------------------------------------------------
**
** Build the identify / tag / sdtr message
**
**----------------------------------------------------
*/
idmsg = M_IDENTIFY | cmd->lun;
if (cp != np->ccb && ((np->disc && !(tp->usrflag & UF_NODISC)) || cp->tag))
idmsg |= 0x40;
msgptr = cp->scsi_smsg;
msglen = 0;
msgptr[msglen++] = idmsg;
if (cp->tag) {
char tag;
tag = np->order;
if (tag == 0) {
/*
** Ordered write ops, unordered read ops.
*/
switch (cmd->cmnd[0]) {
case 0x08: /* READ_SMALL (6) */
case 0x28: /* READ_BIG (10) */
case 0xa8: /* READ_HUGE (12) */
tag = M_SIMPLE_TAG;
break;
default:
tag = M_ORDERED_TAG;
}
}
/*
** Have to force ordered tag to avoid timeouts
*/
if ((lp = tp->lp[cmd->lun]) && (lp->force_ordered_tag)) {
tag = M_ORDERED_TAG;
lp->force_ordered_tag = 0;
if (DEBUG_FLAGS & DEBUG_TAGS) {
PRINT_ADDR(cmd);
printf ("Ordered Queue Tag forced\n");
}
}
msgptr[msglen++] = tag;
msgptr[msglen++] = cp -> tag;
}
switch (nego) {
case NS_SYNC:
msgptr[msglen++] = M_EXTENDED;
msgptr[msglen++] = 3;
msgptr[msglen++] = M_X_SYNC_REQ;
msgptr[msglen++] = tp->maxoffs ? tp->minsync : 0;
msgptr[msglen++] = tp->maxoffs;
if (DEBUG_FLAGS & DEBUG_NEGO) {
PRINT_ADDR(cp->cmd);
printf ("sync msgout: ");
ncr_show_msg (&cp->scsi_smsg [msglen-5]);
printf (".\n");
};
break;
case NS_WIDE:
msgptr[msglen++] = M_EXTENDED;
msgptr[msglen++] = 2;
msgptr[msglen++] = M_X_WIDE_REQ;
msgptr[msglen++] = tp->usrwide;
if (DEBUG_FLAGS & DEBUG_NEGO) {
PRINT_ADDR(cp->cmd);
printf ("wide msgout: ");
ncr_show_msg (&cp->scsi_smsg [msglen-4]);
printf (".\n");
};
break;
};
/*----------------------------------------------------
**
** Build the identify message for getcc.
**
**----------------------------------------------------
*/
cp -> scsi_smsg2 [0] = idmsg;
msglen2 = 1;
/*----------------------------------------------------
**
** Build the data descriptors
**
**----------------------------------------------------
*/
segments = ncr_scatter (cp, cp->cmd);
if (segments < 0) {
ncr_free_ccb(np, cp, cmd->target, cmd->lun);
restore_flags(flags);
return(DID_ERROR);
}
/*----------------------------------------------------
**
** Guess xfer direction.
** Spare some CPU by testing here frequently opcode.
**
**----------------------------------------------------
*/
switch((int) cmd->cmnd[0]) {
case 0x08: /* READ(6) 08 */
case 0x28: /* READ(10) 28 */
case 0xA8: /* READ(12) A8 */
xfer_direction = XferIn;
break;
case 0x0A: /* WRITE(6) 0A */
case 0x2A: /* WRITE(10) 2A */
case 0xAA: /* WRITE(12) AA */
xfer_direction = XferOut;
break;
default:
xfer_direction = guess_xfer_direction((int) cmd->cmnd[0]);
break;
}
/*----------------------------------------------------
**
** Set the SAVED_POINTER.
**
**----------------------------------------------------
*/
cp->segments = segments;
if (!cp->data_len)
xfer_direction = XferNone;
switch (xfer_direction) {
u_long endp;
default:
case XferBoth:
cp->phys.header.savep =
cpu_to_scr(NCB_SCRIPT_PHYS (np, data_io));
cp->phys.header.goalp = cp->phys.header.savep;
break;
case XferIn:
endp = NCB_SCRIPT_PHYS (np, data_in) + MAX_SCATTER*16;
cp->phys.header.goalp = cpu_to_scr(endp + 8);
cp->phys.header.savep = cpu_to_scr(endp - segments*16);
break;
case XferOut:
endp = NCB_SCRIPTH_PHYS (np, data_out) + MAX_SCATTER*16;
cp->phys.header.goalp = cpu_to_scr(endp + 8);
cp->phys.header.savep = cpu_to_scr(endp - segments*16);
break;
case XferNone:
cp->phys.header.savep =
cpu_to_scr(NCB_SCRIPT_PHYS (np, no_data));
cp->phys.header.goalp = cp->phys.header.savep;
break;
}
cp->phys.header.lastp = cp->phys.header.savep;
/*----------------------------------------------------
**
** fill in ccb
**
**----------------------------------------------------
**
**
** physical -> virtual backlink
** Generic SCSI command
*/
cp->phys.header.cp = cp;
/*
** Startqueue
*/
cp->phys.header.launch.l_paddr =
cpu_to_scr(NCB_SCRIPT_PHYS (np, select));
cp->phys.header.launch.l_cmd = cpu_to_scr(SCR_JUMP);
/*
** select
*/
cp->phys.select.sel_id = cmd->target;
cp->phys.select.sel_scntl3 = tp->wval;
cp->phys.select.sel_sxfer = tp->sval;
/*
** message
*/
cp->phys.smsg.addr = cpu_to_scr(CCB_PHYS (cp, scsi_smsg));
cp->phys.smsg.size = cpu_to_scr(msglen);
cp->phys.smsg2.addr = cpu_to_scr(CCB_PHYS (cp, scsi_smsg2));
cp->phys.smsg2.size = cpu_to_scr(msglen2);
/*
** command
*/
cp->phys.cmd.addr = cpu_to_scr(vtophys (&cmd->cmnd[0]));
cp->phys.cmd.size = cpu_to_scr(cmd->cmd_len);
/*
** sense command
*/
cp->phys.scmd.addr = cpu_to_scr(CCB_PHYS (cp, sensecmd));
cp->phys.scmd.size = cpu_to_scr(6);
/*
** patch requested size into sense command
*/
cp->sensecmd[0] = 0x03;
cp->sensecmd[1] = cmd->lun << 5;
cp->sensecmd[4] = sizeof(cmd->sense_buffer);
/*
** sense data
*/
cp->phys.sense.addr =
cpu_to_scr(vtophys (&cmd->sense_buffer[0]));
cp->phys.sense.size = cpu_to_scr(sizeof(cmd->sense_buffer));
/*
** status
*/
cp->actualquirks = tp->quirks;
cp->host_status = nego ? HS_NEGOTIATE : HS_BUSY;
cp->scsi_status = S_ILLEGAL;
cp->parity_status = 0;
cp->xerr_status = XE_OK;
cp->sync_status = tp->sval;
cp->nego_status = nego;
cp->wide_status = tp->wval;
/*----------------------------------------------------
**
** Critical region: start this job.
**
**----------------------------------------------------
*/
/*
** reselect pattern and activate this job.
*/
cp->jump_ccb.l_cmd =
cpu_to_scr((SCR_JUMP ^ IFFALSE (DATA (cp->tag))));
/* Compute a time limit greater than the middle-level driver one */
if (cmd->timeout_per_command > 0)
cp->tlimit = jiffies + cmd->timeout_per_command + NCR_TIMEOUT_INCREASE;
else
cp->tlimit = jiffies + 3600 * HZ; /* No timeout=one hour */
cp->magic = CCB_MAGIC;
/*
** insert into start queue.
*/
qidx = np->squeueput + 1;
if (qidx >= MAX_START) qidx=0;
np->squeue [qidx ] = cpu_to_scr(NCB_SCRIPT_PHYS (np, idle));
np->squeue [np->squeueput] = cpu_to_scr(CCB_PHYS (cp, phys));
np->squeueput = qidx;
if(DEBUG_FLAGS & DEBUG_QUEUE)
printf ("%s: queuepos=%d tryoffset=%d.\n", ncr_name (np),
np->squeueput,
(unsigned)(scr_to_cpu(np->script->startpos[0]) -
(NCB_SCRIPTH_PHYS (np, tryloop))));
/*
** Script processor may be waiting for reselect.
** Wake it up.
*/
#ifdef SCSI_NCR_DEBUG_ERROR_RECOVERY_SUPPORT
if (!np->stalling)
#endif
OUTB (nc_istat, SIGP);
/*
** and reenable interrupts
*/
restore_flags(flags);
/*
** Command is successfully queued.
*/
return(DID_OK);
}
/*==========================================================
**
**
** Start reset process.
** If reset in progress do nothing.
** The interrupt handler will reinitialize the chip.
** The timeout handler will wait for settle_time before
** clearing it and so resuming command processing.
**
**
**==========================================================
*/
static void ncr_start_reset(ncb_p np, int settle_delay)
{
u_long flags;
save_flags(flags); cli();
if (!np->settle_time) {
(void) ncr_reset_scsi_bus(np, 1, settle_delay);
}
restore_flags(flags);
}
static int ncr_reset_scsi_bus(ncb_p np, int enab_int, int settle_delay)
{
u_int32 term;
int retv = 0;
np->settle_time = jiffies + settle_delay * HZ;
if (bootverbose > 1)
printf("%s: resetting, "
"command processing suspended for %d seconds\n",
ncr_name(np), settle_delay);
OUTB (nc_istat, SRST);
DELAY (1000);
OUTB (nc_istat, 0);
if (enab_int)
OUTW (nc_sien, RST);
/*
** Enable Tolerant, reset IRQD if present and
** properly set IRQ mode, prior to resetting the bus.
*/
OUTB (nc_stest3, TE);
OUTB (nc_dcntl, (np->rv_dcntl & IRQM));
OUTB (nc_scntl1, CRST);
DELAY (100);
if (!driver_setup.bus_check)
goto out;
/*
** Check for no terminators or SCSI bus shorts to ground.
** Read SCSI data bus, data parity bits and control signals.
** We are expecting RESET to be TRUE and other signals to be
** FALSE.
*/
term = INB(nc_sstat0); /* rst, sdp0 */
term = ((term & 2) << 7) + ((term & 1) << 16);
term |= ((INB(nc_sstat2) & 0x01) << 25) | /* sdp1 */
(INW(nc_sbdl) << 9) | /* d15-0 */
INB(nc_sbcl); /* req, ack, bsy, sel, atn, msg, cd, io */
if (!(np->features & FE_WIDE))
term &= 0x3ffff;
if (term != (2<<7)) {
printf("%s: suspicious SCSI data while resetting the BUS.\n",
ncr_name(np));
printf("%s: %sdp0,d7-0,rst,req,ack,bsy,sel,atn,msg,c/d,i/o = "
"0x%lx, expecting 0x%lx\n",
ncr_name(np),
(np->features & FE_WIDE) ? "dp1,d15-8," : "",
(u_long)term, (u_long)(2<<7));
if (driver_setup.bus_check == 1)
retv = 1;
}
out:
OUTB (nc_scntl1, 0);
return retv;
}
/*==========================================================
**
**
** Reset the SCSI BUS.
** This is called from the generic SCSI driver.
**
**
**==========================================================
*/
int ncr_reset_bus (Scsi_Cmnd *cmd, int sync_reset)
{
struct Scsi_Host *host = cmd->host;
/* Scsi_Device *device = cmd->device; */
struct host_data *host_data = (struct host_data *) host->hostdata;
ncb_p np = host_data->ncb;
ccb_p cp;
u_long flags;
int found;
#ifdef SCSI_NCR_DEBUG_ERROR_RECOVERY_SUPPORT
if (np->stalling)
np->stalling = 0;
#endif
save_flags(flags); cli();
/*
* Return immediately if reset is in progress.
*/
if (np->settle_time) {
restore_flags(flags);
return SCSI_RESET_PUNT;
}
/*
* Start the reset process.
* The script processor is then assumed to be stopped.
* Commands will now be queued in the waiting list until a settle
* delay of 2 seconds will be completed.
*/
ncr_start_reset(np, driver_setup.settle_delay);
/*
* First, look in the wakeup list
*/
for (found=0, cp=np->ccb; cp; cp=cp->link_ccb) {
/*
** look for the ccb of this command.
*/
if (cp->host_status == HS_IDLE) continue;
if (cp->cmd == cmd) {
found = 1;
break;
}
}
/*
* Then, look in the waiting list
*/
if (!found && retrieve_from_waiting_list(0, np, cmd))
found = 1;
/*
* Wake-up all awaiting commands with DID_RESET.
*/
reset_waiting_list(np);
/*
* Wake-up all pending commands with HS_RESET -> DID_RESET.
*/
ncr_wakeup(np, HS_RESET);
/*
* If the involved command was not in a driver queue, and the
* scsi driver told us reset is synchronous, and the command is not
* currently in the waiting list, complete it with DID_RESET status,
* in order to keep it alive.
*/
if (!found && sync_reset && !retrieve_from_waiting_list(0, np, cmd)) {
cmd->result = ScsiResult(DID_RESET, 0);
cmd->scsi_done(cmd);
}
restore_flags(flags);
return SCSI_RESET_SUCCESS;
}
/*==========================================================
**
**
** Abort an SCSI command.
** This is called from the generic SCSI driver.
**
**
**==========================================================
*/
static int ncr_abort_command (Scsi_Cmnd *cmd)
{
struct Scsi_Host *host = cmd->host;
/* Scsi_Device *device = cmd->device; */
struct host_data *host_data = (struct host_data *) host->hostdata;
ncb_p np = host_data->ncb;
ccb_p cp;
u_long flags;
int found;
int retv;
#ifdef SCSI_NCR_DEBUG_ERROR_RECOVERY_SUPPORT
if (np->stalling == 2)
np->stalling = 0;
#endif
save_flags(flags); cli();
/*
* First, look for the scsi command in the waiting list
*/
if (remove_from_waiting_list(np, cmd)) {
cmd->result = ScsiResult(DID_ABORT, 0);
cmd->scsi_done(cmd);
restore_flags(flags);
return SCSI_ABORT_SUCCESS;
}
/*
* Then, look in the wakeup list
*/
for (found=0, cp=np->ccb; cp; cp=cp->link_ccb) {
/*
** look for the ccb of this command.
*/
if (cp->host_status == HS_IDLE) continue;
if (cp->cmd == cmd) {
found = 1;
break;
}
}
if (!found) {
restore_flags(flags);
return SCSI_ABORT_NOT_RUNNING;
}
if (np->settle_time) {
restore_flags(flags);
return SCSI_ABORT_SNOOZE;
}
/*
** Disable reselect.
** Remove it from startqueue.
** Set cp->tlimit to 0. The ncr_timeout() handler will use
** this condition in order to complete the canceled command
** after the script skipped the ccb, if necessary.
*/
cp->jump_ccb.l_cmd = cpu_to_scr(SCR_JUMP);
if (cp->phys.header.launch.l_paddr ==
cpu_to_scr(NCB_SCRIPT_PHYS (np, select))) {
printf ("%s: abort ccb=%p (skip)\n", ncr_name (np), cp);
cp->phys.header.launch.l_paddr =
cpu_to_scr(NCB_SCRIPT_PHYS (np, skip));
}
cp->tlimit = 0;
retv = SCSI_ABORT_PENDING;
/*
** If there are no requests, the script
** processor will sleep on SEL_WAIT_RESEL.
** Let's wake it up, since it may have to work.
*/
#ifdef SCSI_NCR_DEBUG_ERROR_RECOVERY_SUPPORT
if (!np->stalling)
#endif
OUTB (nc_istat, SIGP);
restore_flags(flags);
return retv;
}
/*==========================================================
**
** Linux release module stuff.
**
** Called before unloading the module
** Detach the host.
** We have to free resources and halt the NCR chip
**
**==========================================================
*/
#ifdef MODULE
static int ncr_detach(ncb_p np)
{
ccb_p cp;
tcb_p tp;
lcb_p lp;
int target, lun;
int i;
printf("%s: releasing host resources\n", ncr_name(np));
/*
** Stop the ncr_timeout process
** Set release_stage to 1 and wait that ncr_timeout() set it to 2.
*/
#ifdef DEBUG_NCR53C8XX
printf("%s: stopping the timer\n", ncr_name(np));
#endif
np->release_stage = 1;
for (i = 50 ; i && np->release_stage != 2 ; i--) DELAY(100000);
if (np->release_stage != 2)
printf("%s: the timer seems to be already stopped\n", ncr_name(np));
else np->release_stage = 2;
/*
** Disable chip interrupts
*/
#ifdef DEBUG_NCR53C8XX
printf("%s: disabling chip interrupts\n", ncr_name(np));
#endif
OUTW (nc_sien , 0);
OUTB (nc_dien , 0);
/*
** Free irq
*/
#ifdef DEBUG_NCR53C8XX
printf("%s: freeing irq %d\n", ncr_name(np), np->irq);
#endif
#if LINUX_VERSION_CODE >= LinuxVersionCode(1,3,70)
free_irq(np->irq, np);
#else
free_irq(np->irq);
#endif
/*
** Reset NCR chip
** Restore bios setting for automatic clock detection.
*/
printf("%s: resetting chip\n", ncr_name(np));
OUTB (nc_istat, SRST);
DELAY (1000);
OUTB (nc_istat, 0 );
OUTB(nc_dmode, np->sv_dmode);
OUTB(nc_dcntl, np->sv_dcntl);
OUTB(nc_ctest3, np->sv_ctest3);
OUTB(nc_ctest4, np->sv_ctest4);
OUTB(nc_ctest5, np->sv_ctest5);
OUTB(nc_gpcntl, np->sv_gpcntl);
OUTB(nc_stest2, np->sv_stest2);
ncr_selectclock(np, np->sv_scntl3);
/*
** Release Memory mapped IO region and IO mapped region
*/
#ifndef NCR_IOMAPPED
#ifdef DEBUG_NCR53C8XX
printf("%s: releasing memory mapped IO region %lx[%d]\n", ncr_name(np), (u_long) np->vaddr, 128);
#endif
unmap_pci_mem((vm_offset_t) np->vaddr, (u_long) 128);
#ifdef DEBUG_NCR53C8XX
printf("%s: releasing memory mapped IO region %lx[%d]\n", ncr_name(np), (u_long) np->vaddr2, 4096);
#endif
unmap_pci_mem((vm_offset_t) np->vaddr2, (u_long) 4096);
#endif
#ifdef DEBUG_NCR53C8XX
printf("%s: releasing IO region %x[%d]\n", ncr_name(np), np->port, 128);
#endif
release_region(np->port, 128);
/*
** Free allocated ccb(s)
*/
while ((cp=np->ccb->link_ccb) != NULL) {
np->ccb->link_ccb = cp->link_ccb;
if (cp->host_status) {
printf("%s: shall free an active ccb (host_status=%d)\n",
ncr_name(np), cp->host_status);
}
#ifdef DEBUG_NCR53C8XX
printf("%s: freeing ccb (%lx)\n", ncr_name(np), (u_long) cp);
#endif
m_free(cp, sizeof(*cp));
}
/*
** Free allocated tp(s)
*/
for (target = 0; target < MAX_TARGET ; target++) {
tp=&np->target[target];
for (lun = 0 ; lun < MAX_LUN ; lun++) {
lp = tp->lp[lun];
if (lp) {
#ifdef DEBUG_NCR53C8XX
printf("%s: freeing lp (%lx)\n", ncr_name(np), (u_long) lp);
#endif
m_free(lp, sizeof(*lp));
}
}
}
printf("%s: host resources successfully released\n", ncr_name(np));
return 1;
}
#endif
/*==========================================================
**
**
** Complete execution of a SCSI command.
** Signal completion to the generic SCSI driver.
**
**
**==========================================================
*/
void ncr_complete (ncb_p np, ccb_p cp)
{
Scsi_Cmnd *cmd;
tcb_p tp;
lcb_p lp;
/*
** Sanity check
*/
if (!cp || (cp->magic!=CCB_MAGIC) || !cp->cmd) return;
cp->magic = 1;
cp->tlimit= 0;
cmd = cp->cmd;
/*
** No Reselect anymore.
*/
cp->jump_ccb.l_cmd = cpu_to_scr(SCR_JUMP);
/*
** No starting.
*/
cp->phys.header.launch.l_paddr = cpu_to_scr(NCB_SCRIPT_PHYS (np, idle));
/*
** timestamp
** Optional, spare some CPU time
*/
#ifdef SCSI_NCR_PROFILE_SUPPORT
ncb_profile (np, cp);
#endif
if (DEBUG_FLAGS & DEBUG_TINY)
printf ("CCB=%lx STAT=%x/%x\n", (unsigned long)cp & 0xfff,
cp->host_status,cp->scsi_status);
cmd = cp->cmd;
cp->cmd = NULL;
tp = &np->target[cmd->target];
lp = tp->lp[cmd->lun];
/*
** We donnot queue more than 1 ccb per target
** with negotiation at any time. If this ccb was
** used for negotiation, clear this info in the tcb.
*/
if (cp == tp->nego_cp)
tp->nego_cp = 0;
/*
** Check for parity errors.
*/
if (cp->parity_status) {
PRINT_ADDR(cmd);
printf ("%d parity error(s), fallback.\n", cp->parity_status);
/*
** fallback to asynch transfer.
*/
tp->usrsync=255;
tp->period = 0;
}
/*
** Check for extended errors.
*/
if (cp->xerr_status != XE_OK) {
PRINT_ADDR(cmd);
switch (cp->xerr_status) {
case XE_EXTRA_DATA:
printf ("extraneous data discarded.\n");
break;
case XE_BAD_PHASE:
printf ("illegal scsi phase (4/5).\n");
break;
default:
printf ("extended error %d.\n", cp->xerr_status);
break;
}
if (cp->host_status==HS_COMPLETE)
cp->host_status = HS_FAIL;
}
/*
** Check the status.
*/
if ( (cp->host_status == HS_COMPLETE)
&& (cp->scsi_status == S_GOOD ||
cp->scsi_status == S_COND_MET)) {
/*
** All went well (GOOD status).
** CONDITION MET status is returned on
** `Pre-Fetch' or `Search data' success.
*/
cmd->result = ScsiResult(DID_OK, cp->scsi_status);
/*
** if (cp->phys.header.lastp != cp->phys.header.goalp)...
**
** @RESID@
** Could dig out the correct value for resid,
** but it would be quite complicated.
**
** The ah1542.c driver sets it to 0 too ...
*/
/*
** Try to assign a ccb to this nexus
*/
ncr_alloc_ccb (np, cmd->target, cmd->lun);
/*
** On inquire cmd (0x12) save some data.
** Clear questionnable capacities.
*/
if (cmd->lun == 0 && cmd->cmnd[0] == 0x12) {
if (np->unit < SCSI_NCR_MAX_HOST) {
if (driver_setup.force_sync_nego)
((char *) cmd->request_buffer)[7] |= INQ7_SYNC;
else
((char *) cmd->request_buffer)[7] &=
(target_capabilities[np->unit].and_map[cmd->target]);
}
bcopy ( cmd->request_buffer,
&tp->inqdata,
sizeof (tp->inqdata));
/*
** set number of tags
*/
ncr_setmaxtags (np, tp, driver_setup.default_tags);
/*
** prepare negotiation of synch and wide.
*/
ncr_negotiate (np, tp);
/*
** force quirks update before next command start
*/
tp->quirks |= QUIRK_UPDATE;
}
/*
** Announce changes to the generic driver.
*/
if (lp) {
ncr_settags (tp, lp);
if (lp->reqlink != lp->actlink)
ncr_opennings (np, lp, cmd);
};
tp->bytes += cp->data_len;
tp->transfers ++;
/*
** If tags was reduced due to queue full,
** increase tags if 100 good status received.
*/
if (tp->numtags < tp->maxtags) {
++tp->num_good;
if (tp->num_good >= 100) {
tp->num_good = 0;
++tp->numtags;
if (tp->numtags == 1) {
PRINT_ADDR(cmd);
printf("tagged command queueing resumed\n");
}
}
}
} else if ((cp->host_status == HS_COMPLETE)
&& (cp->scsi_status == (S_SENSE|S_GOOD) ||
cp->scsi_status == (S_SENSE|S_CHECK_COND))) {
/*
** Check condition code
*/
cmd->result = ScsiResult(DID_OK, S_CHECK_COND);
if (DEBUG_FLAGS & (DEBUG_RESULT|DEBUG_TINY)) {
u_char * p = (u_char*) & cmd->sense_buffer;
int i;
printf ("\n%s: sense data:", ncr_name (np));
for (i=0; i<14; i++) printf (" %x", *p++);
printf (".\n");
}
} else if ((cp->host_status == HS_COMPLETE)
&& (cp->scsi_status == S_BUSY ||
cp->scsi_status == S_CONFLICT)) {
/*
** Target is busy.
*/
cmd->result = ScsiResult(DID_OK, cp->scsi_status);
} else if ((cp->host_status == HS_COMPLETE)
&& (cp->scsi_status == S_QUEUE_FULL)) {
/*
** Target is stuffed.
*/
cmd->result = ScsiResult(DID_OK, cp->scsi_status);
/*
** Suspend tagged queuing and start good status counter.
** Announce changes to the generic driver.
*/
if (tp->numtags) {
PRINT_ADDR(cmd);
printf("QUEUE FULL! suspending tagged command queueing\n");
tp->numtags = 0;
tp->num_good = 0;
if (lp) {
ncr_settags (tp, lp);
if (lp->reqlink != lp->actlink)
ncr_opennings (np, lp, cmd);
};
}
} else if ((cp->host_status == HS_SEL_TIMEOUT)
|| (cp->host_status == HS_TIMEOUT)) {
/*
** No response
*/
cmd->result = ScsiResult(DID_TIME_OUT, cp->scsi_status);
} else if (cp->host_status == HS_RESET) {
/*
** SCSI bus reset
*/
cmd->result = ScsiResult(DID_RESET, cp->scsi_status);
} else if (cp->host_status == HS_ABORTED) {
/*
** Transfer aborted
*/
cmd->result = ScsiResult(DID_ABORT, cp->scsi_status);
} else {
/*
** Other protocol messes
*/
PRINT_ADDR(cmd);
printf ("COMMAND FAILED (%x %x) @%p.\n",
cp->host_status, cp->scsi_status, cp);
cmd->result = ScsiResult(DID_ERROR, cp->scsi_status);
}
/*
** trace output
*/
if (tp->usrflag & UF_TRACE) {
u_char * p;
int i;
PRINT_ADDR(cmd);
printf (" CMD:");
p = (u_char*) &cmd->cmnd[0];
for (i=0; i<cmd->cmd_len; i++) printf (" %x", *p++);
if (cp->host_status==HS_COMPLETE) {
switch (cp->scsi_status) {
case S_GOOD:
printf (" GOOD");
break;
case S_CHECK_COND:
printf (" SENSE:");
p = (u_char*) &cmd->sense_buffer;
for (i=0; i<14; i++)
printf (" %x", *p++);
break;
default:
printf (" STAT: %x\n", cp->scsi_status);
break;
}
} else printf (" HOSTERROR: %x", cp->host_status);
printf ("\n");
}
/*
** Free this ccb
*/
ncr_free_ccb (np, cp, cmd->target, cmd->lun);
/*
** requeue awaiting scsi commands
*/
if (np->waiting_list) requeue_waiting_list(np);
/*
** signal completion to generic driver.
*/
cmd->scsi_done (cmd);
}
/*==========================================================
**
**
** Signal all (or one) control block done.
**
**
**==========================================================
*/
void ncr_wakeup (ncb_p np, u_long code)
{
/*
** Starting at the default ccb and following
** the links, complete all jobs with a
** host_status greater than "disconnect".
**
** If the "code" parameter is not zero,
** complete all jobs that are not IDLE.
*/
ccb_p cp = np->ccb;
while (cp) {
switch (cp->host_status) {
case HS_IDLE:
break;
case HS_DISCONNECT:
if(DEBUG_FLAGS & DEBUG_TINY) printf ("D");
/* fall through */
case HS_BUSY:
case HS_NEGOTIATE:
if (!code) break;
cp->host_status = code;
/* fall through */
default:
ncr_complete (np, cp);
break;
};
cp = cp -> link_ccb;
};
}
/*==========================================================
**
**
** Start NCR chip.
**
**
**==========================================================
*/
void ncr_init (ncb_p np, int reset, char * msg, u_long code)
{
int i;
/*
** Reset chip if asked, otherwise just clear fifos.
*/
if (reset) {
OUTB (nc_istat, SRST);
DELAY (10000);
}
else {
OUTB (nc_stest3, TE|CSF);
OUTONB (nc_ctest3, CLF);
}
/*
** Message.
*/
if (msg) printf (KERN_INFO "%s: restart (%s).\n", ncr_name (np), msg);
/*
** Clear Start Queue
*/
for (i=0;i<MAX_START;i++)
np -> squeue [i] = cpu_to_scr(NCB_SCRIPT_PHYS (np, idle));
/*
** Start at first entry.
*/
np->squeueput = 0;
np->script0->startpos[0] = cpu_to_scr(NCB_SCRIPTH_PHYS (np, tryloop));
np->script0->start0 [0] = cpu_to_scr(SCR_INT ^ IFFALSE (0));
/*
** Wakeup all pending jobs.
*/
ncr_wakeup (np, code);
/*
** Init chip.
*/
OUTB (nc_istat, 0x00 ); /* Remove Reset, abort */
OUTB (nc_scntl0, np->rv_scntl0 | 0xc0);
/* full arb., ena parity, par->ATN */
OUTB (nc_scntl1, 0x00); /* odd parity, and remove CRST!! */
ncr_selectclock(np, np->rv_scntl3); /* Select SCSI clock */
OUTB (nc_scid , RRE|np->myaddr); /* Adapter SCSI address */
OUTW (nc_respid, 1ul<<np->myaddr); /* Id to respond to */
OUTB (nc_istat , SIGP ); /* Signal Process */
OUTB (nc_dmode , np->rv_dmode); /* Burst length, dma mode */
OUTB (nc_ctest5, np->rv_ctest5); /* Large fifo + large burst */
OUTB (nc_dcntl , NOCOM|np->rv_dcntl); /* Protect SFBR */
OUTB (nc_ctest3, np->rv_ctest3); /* Write and invalidate */
OUTB (nc_ctest4, np->rv_ctest4); /* Master parity checking */
OUTB (nc_stest2, EXT|np->rv_stest2); /* Extended Sreq/Sack filtering */
OUTB (nc_stest3, TE); /* TolerANT enable */
OUTB (nc_stime0, 0x0d ); /* HTH disabled STO 0.4 sec. */
/*
** Disable disconnects.
*/
np->disc = 0;
/*
** Enable GPIO0 pin for writing if LED support.
*/
if (np->features & FE_LED0) {
OUTOFFB (nc_gpcntl, 0x01);
}
/*
** Upload the script into on-board RAM
*/
if (np->vaddr2) {
if (bootverbose)
printf ("%s: copying script fragments into the on-board RAM ...\n", ncr_name(np));
#if LINUX_VERSION_CODE >= LinuxVersionCode(2,0,0)
memcpy_toio(np->script, np->script0, sizeof(struct script));
#else
memcpy(np->script, np->script0, sizeof(struct script));
#endif
}
/*
** enable ints
*/
OUTW (nc_sien , STO|HTH|MA|SGE|UDC|RST);
OUTB (nc_dien , MDPE|BF|ABRT|SSI|SIR|IID);
/*
** For 895/6 enable SBMC interrupt and save current SCSI bus mode.
*/
if (np->features & FE_ULTRA2) {
OUTONW (nc_sien, SBMC);
np->scsi_mode = INB (nc_stest4) & SMODE;
}
/*
** Fill in target structure.
** Reinitialize usrsync.
** Reinitialize usrwide.
** Prepare sync negotiation according to actual SCSI bus mode.
*/
for (i=0;i<MAX_TARGET;i++) {
tcb_p tp = &np->target[i];
tp->sval = 0;
tp->wval = np->rv_scntl3;
if (tp->usrsync != 255) {
if (tp->usrsync <= np->maxsync) {
if (tp->usrsync < np->minsync) {
tp->usrsync = np->minsync;
}
}
else
tp->usrsync = 255;
};
if (tp->usrwide > np->maxwide)
tp->usrwide = np->maxwide;
ncr_negotiate (np, tp);
}
/*
** Start script processor.
*/
OUTL (nc_dsp, NCB_SCRIPT_PHYS (np, start));
}
/*==========================================================
**
** Prepare the negotiation values for wide and
** synchronous transfers.
**
**==========================================================
*/
static void ncr_negotiate (struct ncb* np, struct tcb* tp)
{
/*
** minsync unit is 4ns !
*/
u_long minsync = tp->usrsync;
/*
** SCSI bus mode limit
*/
if (np->scsi_mode && np->scsi_mode == SMODE_SE) {
if (minsync < 12) minsync = 12;
}
/*
** if not scsi 2
** don't believe FAST!
*/
if ((minsync < 50) && (tp->inqdata[2] & 0x0f) < 2)
minsync=50;
/*
** our limit ..
*/
if (minsync < np->minsync)
minsync = np->minsync;
/*
** divider limit
*/
if (minsync > np->maxsync)
minsync = 255;
tp->minsync = minsync;
tp->maxoffs = (minsync<255 ? np->maxoffs : 0);
/*
** period=0: has to negotiate sync transfer
*/
tp->period=0;
/*
** widedone=0: has to negotiate wide transfer
*/
tp->widedone=0;
}
/*==========================================================
**
** Get clock factor and sync divisor for a given
** synchronous factor period.
** Returns the clock factor (in sxfer) and scntl3
** synchronous divisor field.
**
**==========================================================
*/
static void ncr_getsync(ncb_p np, u_char sfac, u_char *fakp, u_char *scntl3p)
{
u_long clk = np->clock_khz; /* SCSI clock frequency in kHz */
int div = np->clock_divn; /* Number of divisors supported */
u_long fak; /* Sync factor in sxfer */
u_long per; /* Period in tenths of ns */
u_long kpc; /* (per * clk) */
/*
** Compute the synchronous period in tenths of nano-seconds
*/
if (sfac <= 10) per = 250;
else if (sfac == 11) per = 303;
else if (sfac == 12) per = 500;
else per = 40 * sfac;
/*
** Look for the greatest clock divisor that allows an
** input speed faster than the period.
*/
kpc = per * clk;
while (--div >= 0)
if (kpc >= (div_10M[div] << 2)) break;
/*
** Calculate the lowest clock factor that allows an output
** speed not faster than the period.
*/
fak = (kpc - 1) / div_10M[div] + 1;
#if 0 /* This optimization does not seem very usefull */
per = (fak * div_10M[div]) / clk;
/*
** Why not to try the immediate lower divisor and to choose
** the one that allows the fastest output speed ?
** We don't want input speed too much greater than output speed.
*/
if (div >= 1 && fak < 8) {
u_long fak2, per2;
fak2 = (kpc - 1) / div_10M[div-1] + 1;
per2 = (fak2 * div_10M[div-1]) / clk;
if (per2 < per && fak2 <= 8) {
fak = fak2;
per = per2;
--div;
}
}
#endif
if (fak < 4) fak = 4; /* Should never happen, too bad ... */
/*
** Compute and return sync parameters for the ncr
*/
*fakp = fak - 4;
*scntl3p = ((div+1) << 4) + (sfac < 25 ? 0x80 : 0);
}
/*==========================================================
**
** Set actual values, sync status and patch all ccbs of
** a target according to new sync/wide agreement.
**
**==========================================================
*/
static void ncr_set_sync_wide_status (ncb_p np, u_char target)
{
ccb_p cp;
tcb_p tp = &np->target[target];
/*
** set actual value and sync_status
*/
OUTB (nc_sxfer, tp->sval);
np->sync_st = tp->sval;
OUTB (nc_scntl3, tp->wval);
np->wide_st = tp->wval;
/*
** patch ALL ccbs of this target.
*/
for (cp = np->ccb; cp; cp = cp->link_ccb) {
if (!cp->cmd) continue;
if (cp->cmd->target != target) continue;
cp->sync_status = tp->sval;
cp->wide_status = tp->wval;
};
}
/*==========================================================
**
** Switch sync mode for current job and it's target
**
**==========================================================
*/
static void ncr_setsync (ncb_p np, ccb_p cp, u_char scntl3, u_char sxfer)
{
Scsi_Cmnd *cmd;
tcb_p tp;
u_char target = INB (nc_ctest0) & 0x0f;
u_char idiv;
assert (cp);
if (!cp) return;
cmd = cp->cmd;
assert (cmd);
if (!cmd) return;
assert (target == (cmd->target & 0xf));
tp = &np->target[target];
if (!scntl3 || !(sxfer & 0x1f))
scntl3 = np->rv_scntl3;
scntl3 = (scntl3 & 0xf0) | (tp->wval & EWS) | (np->rv_scntl3 & 0x07);
/*
** Deduce the value of controller sync period from scntl3.
** period is in tenths of nano-seconds.
*/
idiv = ((scntl3 >> 4) & 0x7);
if ((sxfer & 0x1f) && idiv)
tp->period = (((sxfer>>5)+4)*div_10M[idiv-1])/np->clock_khz;
else
tp->period = 0xffff;
/*
** Stop there if sync parameters are unchanged
*/
if (tp->sval == sxfer && tp->wval == scntl3) return;
tp->sval = sxfer;
tp->wval = scntl3;
/*
** Bells and whistles ;-)
*/
PRINT_ADDR(cmd);
if (sxfer & 0x01f) {
unsigned f10 = 100000 << (tp->widedone ? tp->widedone -1 : 0);
unsigned mb10 = (f10 + tp->period/2) / tp->period;
char *scsi;
/*
** Disable extended Sreq/Sack filtering
*/
if (tp->period <= 2000) OUTOFFB (nc_stest2, EXT);
/*
** Bells and whistles ;-)
*/
if (tp->period < 500) scsi = "FAST-40";
else if (tp->period < 1000) scsi = "FAST-20";
else if (tp->period < 2000) scsi = "FAST-10";
else scsi = "FAST-5";
printf ("%s %sSCSI %d.%d MB/s (%d ns, offset %d)\n", scsi,
tp->widedone > 1 ? "WIDE " : "",
mb10 / 10, mb10 % 10, tp->period / 10, sxfer & 0x1f);
} else
printf ("%sasynchronous.\n", tp->widedone > 1 ? "wide " : "");
/*
** set actual value and sync_status
** patch ALL ccbs of this target.
*/
ncr_set_sync_wide_status(np, target);
}
/*==========================================================
**
** Switch wide mode for current job and it's target
** SCSI specs say: a SCSI device that accepts a WDTR
** message shall reset the synchronous agreement to
** asynchronous mode.
**
**==========================================================
*/
static void ncr_setwide (ncb_p np, ccb_p cp, u_char wide, u_char ack)
{
Scsi_Cmnd *cmd;
u_short target = INB (nc_ctest0) & 0x0f;
tcb_p tp;
u_char scntl3;
u_char sxfer;
assert (cp);
if (!cp) return;
cmd = cp->cmd;
assert (cmd);
if (!cmd) return;
assert (target == (cmd->target & 0xf));
tp = &np->target[target];
tp->widedone = wide+1;
scntl3 = (tp->wval & (~EWS)) | (wide ? EWS : 0);
sxfer = ack ? 0 : tp->sval;
/*
** Stop there if sync/wide parameters are unchanged
*/
if (tp->sval == sxfer && tp->wval == scntl3) return;
tp->sval = sxfer;
tp->wval = scntl3;
/*
** Bells and whistles ;-)
*/
if (bootverbose >= 2) {
PRINT_ADDR(cmd);
if (scntl3 & EWS)
printf ("WIDE SCSI (16 bit) enabled.\n");
else
printf ("WIDE SCSI disabled.\n");
}
/*
** set actual value and sync_status
** patch ALL ccbs of this target.
*/
ncr_set_sync_wide_status(np, target);
}
/*==========================================================
**
** Switch tagged mode for a target.
**
**==========================================================
*/
static void ncr_setmaxtags (ncb_p np, tcb_p tp, u_long numtags)
{
int l;
if (numtags > tp->usrtags)
numtags = tp->usrtags;
tp->numtags = numtags;
tp->maxtags = numtags;
for (l=0; l<MAX_LUN; l++) {
lcb_p lp;
u_char wastags;
if (!tp) break;
lp=tp->lp[l];
if (!lp) continue;
wastags = lp->usetags;
ncr_settags (tp, lp);
if (numtags > 1 && lp->reqccbs > 1) {
PRINT_LUN(np, tp - np->target, l);
printf("using tagged command queueing, up to %ld cmds/lun\n", numtags);
}
else if (numtags <= 1 && wastags) {
PRINT_LUN(np, tp - np->target, l);
printf("disabling tagged command queueing\n");
}
};
}
static void ncr_settags (tcb_p tp, lcb_p lp)
{
u_char reqtags, tmp;
if ((!tp) || (!lp)) return;
/*
** only devices conformant to ANSI Version >= 2
** only devices capable of tagges commands
** only disk devices
** only if enabled by user ..
*/
if (( tp->inqdata[2] & 0x7) >= 2 &&
( tp->inqdata[7] & INQ7_QUEUE) && ((tp->inqdata[0] & 0x1f)==0x00)
&& tp->numtags > 1) {
reqtags = tp->numtags;
if (lp->actlink <= 1)
lp->usetags=reqtags;
} else {
reqtags = 1;
if (lp->actlink <= 1)
lp->usetags=0;
};
/*
** don't announce more than available.
*/
tmp = lp->actccbs;
if (tmp > reqtags) tmp = reqtags;
lp->reqlink = tmp;
/*
** don't discard if announced.
*/
tmp = lp->actlink;
if (tmp < reqtags) tmp = reqtags;
lp->reqccbs = tmp;
}
/*----------------------------------------------------
**
** handle user commands
**
**----------------------------------------------------
*/
#ifdef SCSI_NCR_USER_COMMAND_SUPPORT
static void ncr_usercmd (ncb_p np)
{
u_char t;
tcb_p tp;
switch (np->user.cmd) {
case 0: return;
case UC_SETSYNC:
for (t=0; t<MAX_TARGET; t++) {
if (!((np->user.target>>t)&1)) continue;
tp = &np->target[t];
tp->usrsync = np->user.data;
ncr_negotiate (np, tp);
};
break;
case UC_SETTAGS:
if (np->user.data > SCSI_NCR_MAX_TAGS)
np->user.data = SCSI_NCR_MAX_TAGS;
for (t=0; t<MAX_TARGET; t++) {
if (!((np->user.target>>t)&1)) continue;
np->target[t].usrtags = np->user.data;
ncr_setmaxtags (np, &np->target[t], np->user.data);
};
break;
case UC_SETDEBUG:
#ifdef SCSI_NCR_DEBUG_INFO_SUPPORT
ncr_debug = np->user.data;
#endif
break;
case UC_SETORDER:
np->order = np->user.data;
break;
case UC_SETWIDE:
for (t=0; t<MAX_TARGET; t++) {
u_long size;
if (!((np->user.target>>t)&1)) continue;
tp = &np->target[t];
size = np->user.data;
if (size > np->maxwide) size=np->maxwide;
tp->usrwide = size;
ncr_negotiate (np, tp);
};
break;
case UC_SETFLAG:
for (t=0; t<MAX_TARGET; t++) {
if (!((np->user.target>>t)&1)) continue;
tp = &np->target[t];
tp->usrflag = np->user.data;
};
break;
case UC_CLEARPROF:
bzero(&np->profile, sizeof(np->profile));
break;
#ifdef UC_DEBUG_ERROR_RECOVERY
case UC_DEBUG_ERROR_RECOVERY:
np->debug_error_recovery = np->user.data;
break;
#endif
}
np->user.cmd=0;
}
#endif
/*=====================================================================
**
** Embedded error recovery debugging code.
**
**=====================================================================
**
** This code is conditionned by SCSI_NCR_DEBUG_ERROR_RECOVERY_SUPPORT.
** It only can be enabled after boot-up with a control command.
**
** Every 30 seconds the timer handler of the driver decides to
** change the behaviour of the driver in order to trigger errors.
**
** If last command was "debug_error_recovery sge", the driver
** sets sync offset of all targets that use sync transfers to 2,
** and so hopes a SCSI gross error at the next read operation.
**
** If last command was "debug_error_recovery abort", the driver
** does not signal new scsi commands to the script processor, until
** it is asked to abort or reset a command by the mid-level driver.
**
** If last command was "debug_error_recovery reset", the driver
** does not signal new scsi commands to the script processor, until
** it is asked to reset a command by the mid-level driver.
**
** If last command was "debug_error_recovery parity", the driver
** will assert ATN on the next DATA IN phase mismatch, and so will
** behave as if a parity error had been detected.
**
** The command "debug_error_recovery none" makes the driver behave
** normaly.
**
**=====================================================================
*/
#ifdef SCSI_NCR_DEBUG_ERROR_RECOVERY_SUPPORT
static void ncr_trigger_errors (ncb_p np)
{
/*
** If np->debug_error_recovery is not zero, we want to
** simulate common errors in order to test error recovery.
*/
do {
static u_long last = 0l;
if (!np->debug_error_recovery)
break;
if (!last)
last = jiffies;
else if (jiffies < last + 30*HZ)
break;
last = jiffies;
/*
* This one triggers SCSI gross errors.
*/
if (np->debug_error_recovery == 1) {
int i;
printf("%s: testing error recovery from SCSI gross error...\n", ncr_name(np));
for (i = 0 ; i < MAX_TARGET ; i++) {
if (np->target[i].sval & 0x1f) {
np->target[i].sval &= ~0x1f;
np->target[i].sval += 2;
}
}
}
/*
* This one triggers abort from the mid-level driver.
*/
else if (np->debug_error_recovery == 2) {
printf("%s: testing error recovery from mid-level driver abort()...\n", ncr_name(np));
np->stalling = 2;
}
/*
* This one triggers reset from the mid-level driver.
*/
else if (np->debug_error_recovery == 3) {
printf("%s: testing error recovery from mid-level driver reset()...\n", ncr_name(np));
np->stalling = 3;
}
/*
* This one set ATN on phase mismatch in DATA IN phase and so
* will behave as on scsi parity error detected.
*/
else if (np->debug_error_recovery == 4) {
printf("%s: testing data in parity error...\n", ncr_name(np));
np->assert_atn = 1;
}
} while (0);
}
#endif
/*==========================================================
**
**
** ncr timeout handler.
**
**
**==========================================================
**
** Misused to keep the driver running when
** interrupts are not configured correctly.
**
**----------------------------------------------------------
*/
static void ncr_timeout (ncb_p np)
{
u_long thistime = jiffies;
u_long count = 0;
ccb_p cp;
u_long flags;
/*
** If release process in progress, let's go
** Set the release stage from 1 to 2 to synchronize
** with the release process.
*/
if (np->release_stage) {
if (np->release_stage == 1) np->release_stage = 2;
return;
}
np->timer.expires =
#if LINUX_VERSION_CODE >= LinuxVersionCode(1,3,0)
jiffies +
#endif
SCSI_NCR_TIMER_INTERVAL;
add_timer(&np->timer);
#ifdef SCSI_NCR_DEBUG_ERROR_RECOVERY_SUPPORT
ncr_trigger_errors (np);
#endif
/*
** If we are resetting the ncr, wait for settle_time before
** clearing it. Then command processing will be resumed.
*/
if (np->settle_time) {
if (np->settle_time <= thistime) {
if (bootverbose > 1)
printf("%s: command processing resumed\n", ncr_name(np));
save_flags(flags); cli();
np->settle_time = 0;
np->disc = 1;
requeue_waiting_list(np);
restore_flags(flags);
}
return;
}
/*
** Since the generic scsi driver only allows us 0.5 second
** to perform abort of a command, we must look at ccbs about
** every 0.25 second.
*/
if (np->lasttime + (HZ>>2) <= thistime) {
/*
** block ncr interrupts
*/
save_flags(flags); cli();
np->lasttime = thistime;
/*
** Reset profile data to avoid ugly overflow
** (Limited to 1024 GB for 32 bit architecture)
*/
if (np->profile.num_kbytes > (~0UL >> 2))
bzero(&np->profile, sizeof(np->profile));
/*----------------------------------------------------
**
** handle ncr chip timeouts
**
** Assumption:
** We have a chance to arbitrate for the
** SCSI bus at least every 10 seconds.
**
**----------------------------------------------------
*/
#if 0
if (thistime < np->heartbeat + HZ + HZ)
np->latetime = 0;
else
np->latetime++;
#endif
/*----------------------------------------------------
**
** handle ccb timeouts
**
**----------------------------------------------------
*/
for (cp=np->ccb; cp; cp=cp->link_ccb) {
/*
** look for timed out ccbs.
*/
if (!cp->host_status) continue;
count++;
/*
** Have to force ordered tag to avoid timeouts
*/
if (cp->cmd && cp->tlimit && cp->tlimit <=
thistime + NCR_TIMEOUT_INCREASE + SCSI_NCR_TIMEOUT_ALERT) {
lcb_p lp;
lp = np->target[cp->cmd->target].lp[cp->cmd->lun];
if (lp && !lp->force_ordered_tag) {
lp->force_ordered_tag = 1;
}
}
/*
** ncr_abort_command() cannot complete canceled
** commands immediately. It sets tlimit to zero
** and ask the script to skip the scsi process if
** necessary. We have to complete this work here.
*/
if (cp->tlimit) continue;
switch (cp->host_status) {
case HS_BUSY:
case HS_NEGOTIATE:
/*
** still in start queue ?
*/
if (cp->phys.header.launch.l_paddr ==
cpu_to_scr(NCB_SCRIPT_PHYS (np, skip)))
continue;
/* fall through */
case HS_DISCONNECT:
cp->host_status=HS_ABORTED;
};
cp->tag = 0;
/*
** wakeup this ccb.
*/
ncr_complete (np, cp);
#ifdef SCSI_NCR_DEBUG_ERROR_RECOVERY_SUPPORT
if (!np->stalling)
#endif
OUTB (nc_istat, SIGP);
}
restore_flags(flags);
}
#ifdef SCSI_NCR_BROKEN_INTR
if (INB(nc_istat) & (INTF|SIP|DIP)) {
/*
** Process pending interrupts.
*/
save_flags(flags); cli();
if (DEBUG_FLAGS & DEBUG_TINY) printf ("{");
ncr_exception (np);
if (DEBUG_FLAGS & DEBUG_TINY) printf ("}");
restore_flags(flags);
}
#endif /* SCSI_NCR_BROKEN_INTR */
}
/*==========================================================
**
** log message for real hard errors
**
** "ncr0 targ 0?: ERROR (ds:si) (so-si-sd) (sxfer/scntl3) @ name (dsp:dbc)."
** " reg: r0 r1 r2 r3 r4 r5 r6 ..... rf."
**
** exception register:
** ds: dstat
** si: sist
**
** SCSI bus lines:
** so: control lines as driver by NCR.
** si: control lines as seen by NCR.
** sd: scsi data lines as seen by NCR.
**
** wide/fastmode:
** sxfer: (see the manual)
** scntl3: (see the manual)
**
** current script command:
** dsp: script adress (relative to start of script).
** dbc: first word of script command.
**
** First 16 register of the chip:
** r0..rf
**
**==========================================================
*/
static void ncr_log_hard_error(ncb_p np, u_short sist, u_char dstat)
{
u_int32 dsp;
int script_ofs;
int script_size;
char *script_name;
u_char *script_base;
int i;
dsp = INL (nc_dsp);
if (dsp > np->p_script && dsp <= np->p_script + sizeof(struct script)) {
script_ofs = dsp - np->p_script;
script_size = sizeof(struct script);
script_base = (u_char *) np->script;
script_name = "script";
}
else if (np->p_scripth < dsp &&
dsp <= np->p_scripth + sizeof(struct scripth)) {
script_ofs = dsp - np->p_scripth;
script_size = sizeof(struct scripth);
script_base = (u_char *) np->scripth;
script_name = "scripth";
} else {
script_ofs = dsp;
script_size = 0;
script_base = 0;
script_name = "mem";
}
printf ("%s:%d: ERROR (%x:%x) (%x-%x-%x) (%x/%x) @ (%s %x:%08x).\n",
ncr_name (np), (unsigned)INB (nc_ctest0)&0x0f, dstat, sist,
(unsigned)INB (nc_socl), (unsigned)INB (nc_sbcl), (unsigned)INB (nc_sbdl),
(unsigned)INB (nc_sxfer),(unsigned)INB (nc_scntl3), script_name, script_ofs,
(unsigned)INL (nc_dbc));
if (((script_ofs & 3) == 0) &&
(unsigned)script_ofs < script_size) {
printf ("%s: script cmd = %08x\n", ncr_name(np),
(int) *(ncrcmd *)(script_base + script_ofs));
}
printf ("%s: regdump:", ncr_name(np));
for (i=0; i<16;i++)
printf (" %02x", (unsigned)INB_OFF(i));
printf (".\n");
}
/*============================================================
**
** ncr chip exception handler.
**
**============================================================
**
** In normal cases, interrupt conditions occur one at a
** time. The ncr is able to stack in some extra registers
** other interrupts that will occurs after the first one.
** But severall interrupts may occur at the same time.
**
** We probably should only try to deal with the normal
** case, but it seems that multiple interrupts occur in
** some cases that are not abnormal at all.
**
** The most frequent interrupt condition is Phase Mismatch.
** We should want to service this interrupt quickly.
** A SCSI parity error may be delivered at the same time.
** The SIR interrupt is not very frequent in this driver,
** since the INTFLY is likely used for command completion
** signaling.
** The Selection Timeout interrupt may be triggered with
** IID and/or UDC.
** The SBMC interrupt (SCSI Bus Mode Change) may probably
** occur at any time.
**
** This handler try to deal as cleverly as possible with all
** the above.
**
**============================================================
*/
void ncr_exception (ncb_p np)
{
u_char istat, dstat;
u_short sist;
int i;
/*
** interrupt on the fly ?
** Since the global header may be copied back to a CCB
** using a posted PCI memory write, the last operation on
** the istat register is a READ in order to flush posted
** PCI commands (Btw, the 'do' loop is probably useless).
*/
istat = INB (nc_istat);
if (istat & INTF) {
do {
OUTB (nc_istat, (istat & SIGP) | INTF);
istat = INB (nc_istat);
} while (istat & INTF);
if (DEBUG_FLAGS & DEBUG_TINY) printf ("F ");
np->profile.num_fly++;
ncr_wakeup (np, 0);
};
if (!(istat & (SIP|DIP)))
return;
np->profile.num_int++;
if (istat & CABRT)
OUTB (nc_istat, CABRT);
/*
** Steinbach's Guideline for Systems Programming:
** Never test for an error condition you don't know how to handle.
*/
sist = (istat & SIP) ? INW (nc_sist) : 0;
dstat = (istat & DIP) ? INB (nc_dstat) : 0;
if (DEBUG_FLAGS & DEBUG_TINY)
printf ("<%d|%x:%x|%x:%x>",
(int)INB(nc_scr0),
dstat,sist,
(unsigned)INL(nc_dsp),
(unsigned)INL(nc_dbc));
/*========================================================
** First, interrupts we want to service cleanly.
**
** Phase mismatch is the most frequent interrupt, and
** so we have to service it as quickly and as cleanly
** as possible.
** Programmed interrupts are rarely used in this driver,
** but we must handle them cleanly anyway.
** We try to deal with PAR and SBMC combined with
** some other interrupt(s).
**=========================================================
*/
if (!(sist & (STO|GEN|HTH|SGE|UDC|RST)) &&
!(dstat & (MDPE|BF|ABRT|IID))) {
if ((sist & SBMC) && ncr_int_sbmc (np))
return;
if ((sist & PAR) && ncr_int_par (np))
return;
if (sist & MA) {
ncr_int_ma (np);
return;
}
if (dstat & SIR) {
ncr_int_sir (np);
return;
}
/*
** DEL 397 - 53C875 Rev 3 - Part Number 609-0392410 - ITEM 2.
*/
if (!(sist & (SBMC|PAR)) && !(dstat & SSI)) {
printf( "%s: unknown interrupt(s) ignored, "
"ISTAT=%x DSTAT=%x SIST=%x\n",
ncr_name(np), istat, dstat, sist);
return;
}
OUTONB (nc_dcntl, (STD|NOCOM));
return;
};
/*========================================================
** Now, interrupts that need some fixing up.
** Order and multiple interrupts is so less important.
**
** If SRST has been asserted, we just reset the chip.
**
** Selection is intirely handled by the chip. If the
** chip says STO, we trust it. Seems some other
** interrupts may occur at the same time (UDC, IID), so
** we ignore them. In any case we do enough fix-up
** in the service routine.
** We just exclude some fatal dma errors.
**=========================================================
*/
if (sist & RST) {
ncr_init (np, 1, bootverbose ? "scsi reset" : NULL, HS_RESET);
return;
};
if ((sist & STO) &&
!(dstat & (MDPE|BF|ABRT))) {
/*
** DEL 397 - 53C875 Rev 3 - Part Number 609-0392410 - ITEM 1.
*/
OUTONB (nc_ctest3, CLF);
ncr_int_sto (np);
return;
};
/*=========================================================
** Now, interrupts we are not able to recover cleanly.
** (At least for the moment).
**
** Do the register dump.
** Log message for real hard errors.
** Clear all fifos.
** For MDPE, BF, ABORT, IID, SGE and HTH we reset the
** BUS and the chip.
** We are more soft for UDC.
**=========================================================
*/
if (jiffies - np->regtime > 10*HZ) {
np->regtime = jiffies;
for (i = 0; i<sizeof(np->regdump); i++)
((char*)&np->regdump)[i] = INB_OFF(i);
np->regdump.nc_dstat = dstat;
np->regdump.nc_sist = sist;
};
ncr_log_hard_error(np, sist, dstat);
printf ("%s: have to clear fifos.\n", ncr_name (np));
OUTB (nc_stest3, TE|CSF);
OUTONB (nc_ctest3, CLF);
if ((sist & (SGE)) ||
(dstat & (MDPE|BF|ABORT|IID))) {
ncr_start_reset(np, driver_setup.settle_delay);
return;
};
if (sist & HTH) {
printf ("%s: handshake timeout\n", ncr_name(np));
ncr_start_reset(np, driver_setup.settle_delay);
return;
};
if (sist & UDC) {
printf ("%s: unexpected disconnect\n", ncr_name(np));
if (INB (nc_scr1) != 0xff) {
OUTB (nc_scr1, HS_UNEXPECTED);
OUTL (nc_dsp, NCB_SCRIPT_PHYS (np, cleanup));
};
ncr_start_reset(np, driver_setup.settle_delay);
return;
};
/*=========================================================
** We just miss the cause of the interrupt. :(
** Print a message. The timeout will do the real work.
**=========================================================
*/
printf ("%s: unknown interrupt\n", ncr_name(np));
}
/*==========================================================
**
** ncr chip exception handler for selection timeout
**
**==========================================================
**
** There seems to be a bug in the 53c810.
** Although a STO-Interrupt is pending,
** it continues executing script commands.
** But it will fail and interrupt (IID) on
** the next instruction where it's looking
** for a valid phase.
**
**----------------------------------------------------------
*/
void ncr_int_sto (ncb_p np)
{
u_long dsa, scratcha, diff;
ccb_p cp;
if (DEBUG_FLAGS & DEBUG_TINY) printf ("T");
/*
** look for ccb and set the status.
*/
dsa = INL (nc_dsa);
cp = np->ccb;
while (cp && (CCB_PHYS (cp, phys) != dsa))
cp = cp->link_ccb;
if (cp) {
cp-> host_status = HS_SEL_TIMEOUT;
ncr_complete (np, cp);
};
/*
** repair start queue
*/
scratcha = INL (nc_scratcha);
diff = scratcha - NCB_SCRIPTH_PHYS (np, tryloop);
/* assert ((diff <= MAX_START * 20) && !(diff % 20));*/
if ((diff <= MAX_START * 20) && !(diff % 20)) {
np->script->startpos[0] = cpu_to_scr(scratcha);
OUTL (nc_dsp, NCB_SCRIPT_PHYS (np, start));
return;
};
ncr_init (np, 1, "selection timeout", HS_FAIL);
np->disc = 1;
}
/*==========================================================
**
** ncr chip exception handler for SCSI bus mode change
**
**==========================================================
**
** spi2-r12 11.2.3 says a transceiver mode change must
** generate a reset event and a device that detects a reset
** event shall initiate a hard reset. It says also that a
** device that detects a mode change shall set data transfer
** mode to eight bit asynchronous, etc...
** So, just resetting should be enough.
**
**
**----------------------------------------------------------
*/
static int ncr_int_sbmc (ncb_p np)
{
u_char scsi_mode = INB (nc_stest4) & SMODE;
printf("%s: SCSI bus mode change from %x to %x.\n",
ncr_name(np), np->scsi_mode, scsi_mode);
np->scsi_mode = scsi_mode;
/*
** Suspend command processing for 1 second and
** reinitialize all except the chip.
*/
np->settle_time = jiffies + HZ;
ncr_init (np, 0, bootverbose ? "scsi mode change" : NULL, HS_RESET);
return 1;
}
/*==========================================================
**
** ncr chip exception handler for SCSI parity error.
**
**==========================================================
**
** SCSI parity errors are handled by the SCSI script.
** So, we just print some message.
**
**----------------------------------------------------------
*/
static int ncr_int_par (ncb_p np)
{
printf("%s: SCSI parity error detected\n", ncr_name(np));
return 0;
}
/*==========================================================
**
**
** ncr chip exception handler for phase errors.
**
**
**==========================================================
**
** We have to construct a new transfer descriptor,
** to transfer the rest of the current block.
**
**----------------------------------------------------------
*/
static void ncr_int_ma (ncb_p np)
{
u_int32 dbc;
u_int32 rest;
u_int32 dsp;
u_int32 dsa;
u_int32 nxtdsp;
u_int32 *vdsp;
u_int32 oadr, olen;
u_int32 *tblp;
ncrcmd *newcmd;
u_char cmd, sbcl;
ccb_p cp;
dsp = INL (nc_dsp);
dbc = INL (nc_dbc);
sbcl = INB (nc_sbcl);
cmd = dbc >> 24;
rest = dbc & 0xffffff;
/*
** Take into account dma fifo and various buffers and latches,
** only if the interrupted phase is an OUTPUT phase.
*/
if ((cmd & 1) == 0) {
u_char ctest5, ss0, ss2;
u_short delta;
ctest5 = (np->rv_ctest5 & DFS) ? INB (nc_ctest5) : 0;
if (ctest5 & DFS)
delta=(((ctest5 << 8) | (INB (nc_dfifo) & 0xff)) - rest) & 0x3ff;
else
delta=(INB (nc_dfifo) - rest) & 0x7f;
/*
** The data in the dma fifo has not been transfered to
** the target -> add the amount to the rest
** and clear the data.
** Check the sstat2 register in case of wide transfer.
*/
rest += delta;
ss0 = INB (nc_sstat0);
if (ss0 & OLF) rest++;
if (ss0 & ORF) rest++;
if (INB(nc_scntl3) & EWS) {
ss2 = INB (nc_sstat2);
if (ss2 & OLF1) rest++;
if (ss2 & ORF1) rest++;
};
OUTONB (nc_ctest3, CLF ); /* clear dma fifo */
OUTB (nc_stest3, TE|CSF); /* clear scsi fifo */
if (DEBUG_FLAGS & (DEBUG_TINY|DEBUG_PHASE))
printf ("P%x%x RL=%d D=%d SS0=%x ", cmd&7, sbcl&7,
(unsigned) rest, (unsigned) delta, ss0);
} else {
if (DEBUG_FLAGS & (DEBUG_TINY|DEBUG_PHASE))
printf ("P%x%x RL=%d ", cmd&7, sbcl&7, rest);
if ((cmd & 7) != 1) {
OUTONB (nc_ctest3, CLF );
OUTB (nc_stest3, TE|CSF);
}
}
/*
** locate matching cp
*/
dsa = INL (nc_dsa);
cp = np->ccb;
while (cp && (CCB_PHYS (cp, phys) != dsa))
cp = cp->link_ccb;
if (!cp) {
printf ("%s: SCSI phase error fixup: CCB already dequeued (0x%08lx)\n",
ncr_name (np), (u_long) np->header.cp);
return;
}
if (cp != np->header.cp) {
printf ("%s: SCSI phase error fixup: CCB address mismatch (0x%08lx != 0x%08lx)\n",
ncr_name (np), (u_long) cp, (u_long) np->header.cp);
/* return;*/
}
/*
** find the interrupted script command,
** and the address at which to continue.
*/
if (dsp == vtophys (&cp->patch[2])) {
vdsp = &cp->patch[0];
nxtdsp = vdsp[3];
} else if (dsp == vtophys (&cp->patch[6])) {
vdsp = &cp->patch[4];
nxtdsp = vdsp[3];
} else if (dsp > np->p_script && dsp <= np->p_script + sizeof(struct script)) {
vdsp = (u_int32 *) ((char*)np->script - np->p_script + dsp -8);
nxtdsp = dsp;
} else {
vdsp = (u_int32 *) ((char*)np->scripth - np->p_scripth + dsp -8);
nxtdsp = dsp;
};
/*
** log the information
*/
if (DEBUG_FLAGS & DEBUG_PHASE) {
printf ("\nCP=%p CP2=%p DSP=%x NXT=%x VDSP=%p CMD=%x ",
cp, np->header.cp,
(unsigned)dsp,
(unsigned)nxtdsp, vdsp, cmd);
};
/*
** get old startaddress and old length.
*/
oadr = scr_to_cpu(vdsp[1]);
if (cmd & 0x10) { /* Table indirect */
tblp = (u_int32 *) ((char*) &cp->phys + oadr);
olen = scr_to_cpu(tblp[0]);
oadr = scr_to_cpu(tblp[1]);
} else {
tblp = (u_int32 *) 0;
olen = scr_to_cpu(vdsp[0]) & 0xffffff;
};
if (DEBUG_FLAGS & DEBUG_PHASE) {
printf ("OCMD=%x\nTBLP=%p OLEN=%x OADR=%x\n",
(unsigned) (scr_to_cpu(vdsp[0]) >> 24),
tblp,
(unsigned) olen,
(unsigned) oadr);
};
/*
** check cmd against assumed interrupted script command.
*/
if (cmd != (scr_to_cpu(vdsp[0]) >> 24)) {
PRINT_ADDR(cp->cmd);
printf ("internal error: cmd=%02x != %02x=(vdsp[0] >> 24)\n",
(unsigned)cmd, (unsigned)scr_to_cpu(vdsp[0]) >> 24);
return;
}
#ifdef SCSI_NCR_DEBUG_ERROR_RECOVERY_SUPPORT
if ((cmd & 7) == 1 && np->assert_atn) {
np->assert_atn = 0;
OUTONB(nc_socl, CATN);
}
#endif
/*
** if old phase not dataphase, leave here.
*/
if (cmd & 0x06) {
PRINT_ADDR(cp->cmd);
printf ("phase change %x-%x %d@%08x resid=%d.\n",
cmd&7, sbcl&7, (unsigned)olen,
(unsigned)oadr, (unsigned)rest);
OUTONB (nc_dcntl, (STD|NOCOM));
return;
};
/*
** choose the correct patch area.
** if savep points to one, choose the other.
*/
newcmd = cp->patch;
if (cp->phys.header.savep == cpu_to_scr(vtophys (newcmd))) newcmd+=4;
/*
** fillin the commands
*/
newcmd[0] = cpu_to_scr(((cmd & 0x0f) << 24) | rest);
newcmd[1] = cpu_to_scr(oadr + olen - rest);
newcmd[2] = cpu_to_scr(SCR_JUMP);
newcmd[3] = cpu_to_scr(nxtdsp);
if (DEBUG_FLAGS & DEBUG_PHASE) {
PRINT_ADDR(cp->cmd);
printf ("newcmd[%d] %x %x %x %x.\n",
(int) (newcmd - cp->patch),
(unsigned)scr_to_cpu(newcmd[0]),
(unsigned)scr_to_cpu(newcmd[1]),
(unsigned)scr_to_cpu(newcmd[2]),
(unsigned)scr_to_cpu(newcmd[3]));
}
/*
** fake the return address (to the patch).
** and restart script processor at dispatcher.
*/
np->profile.num_break++;
OUTL (nc_temp, vtophys (newcmd));
if ((cmd & 7) == 0)
OUTL (nc_dsp, NCB_SCRIPT_PHYS (np, dispatch));
else
OUTL (nc_dsp, NCB_SCRIPT_PHYS (np, checkatn));
}
/*==========================================================
**
**
** ncr chip exception handler for programmed interrupts.
**
**
**==========================================================
*/
static int ncr_show_msg (u_char * msg)
{
u_char i;
printf ("%x",*msg);
if (*msg==M_EXTENDED) {
for (i=1;i<8;i++) {
if (i-1>msg[1]) break;
printf ("-%x",msg[i]);
};
return (i+1);
} else if ((*msg & 0xf0) == 0x20) {
printf ("-%x",msg[1]);
return (2);
};
return (1);
}
void ncr_int_sir (ncb_p np)
{
u_char scntl3;
u_char chg, ofs, per, fak, wide;
u_char num = INB (nc_dsps);
ccb_p cp=0;
u_long dsa;
u_char target = INB (nc_ctest0) & 0x0f;
tcb_p tp = &np->target[target];
int i;
if (DEBUG_FLAGS & DEBUG_TINY) printf ("I#%d", num);
switch (num) {
case SIR_SENSE_RESTART:
case SIR_STALL_RESTART:
break;
case SIR_STALL_QUEUE: /* Ignore, just restart the script */
goto out;
default:
/*
** lookup the ccb
*/
dsa = INL (nc_dsa);
cp = np->ccb;
while (cp && (CCB_PHYS (cp, phys) != dsa))
cp = cp->link_ccb;
assert (cp);
if (!cp)
goto out;
assert (cp == np->header.cp);
if (cp != np->header.cp)
goto out;
}
switch (num) {
u_long endp;
case SIR_DATA_IO_IS_OUT:
case SIR_DATA_IO_IS_IN:
/*
** We did not guess the direction of transfer. We have to wait for
** actual data direction driven by the target before setting
** pointers. We must patch the global header too.
*/
if (num == SIR_DATA_IO_IS_OUT) {
endp = NCB_SCRIPTH_PHYS (np, data_out) + MAX_SCATTER*16;
cp->phys.header.goalp = cpu_to_scr(endp + 8);
cp->phys.header.savep =
cpu_to_scr(endp - cp->segments*16);
} else {
endp = NCB_SCRIPT_PHYS (np, data_in) + MAX_SCATTER*16;
cp->phys.header.goalp = cpu_to_scr(endp + 8);
cp->phys.header.savep =
cpu_to_scr(endp - cp->segments*16);
}
cp->phys.header.lastp = cp->phys.header.savep;
np->header.savep = cp->phys.header.savep;
np->header.goalp = cp->phys.header.goalp;
np->header.lastp = cp->phys.header.lastp;
OUTL (nc_temp, scr_to_cpu(np->header.savep));
OUTL (nc_dsp, scr_to_cpu(np->header.savep));
return;
/* break; */
/*--------------------------------------------------------------------
**
** Processing of interrupted getcc selects
**
**--------------------------------------------------------------------
*/
case SIR_SENSE_RESTART:
/*------------------------------------------
** Script processor is idle.
** Look for interrupted "check cond"
**------------------------------------------
*/
if (DEBUG_FLAGS & DEBUG_RESTART)
printf ("%s: int#%d",ncr_name (np),num);
cp = (ccb_p) 0;
for (i=0; i<MAX_TARGET; i++) {
if (DEBUG_FLAGS & DEBUG_RESTART) printf (" t%d", i);
tp = &np->target[i];
if (DEBUG_FLAGS & DEBUG_RESTART) printf ("+");
cp = tp->hold_cp;
if (!cp) continue;
if (DEBUG_FLAGS & DEBUG_RESTART) printf ("+");
if ((cp->host_status==HS_BUSY) &&
(cp->scsi_status==S_CHECK_COND))
break;
if (DEBUG_FLAGS & DEBUG_RESTART) printf ("- (remove)");
tp->hold_cp = cp = (ccb_p) 0;
};
if (cp) {
if (DEBUG_FLAGS & DEBUG_RESTART)
printf ("+ restart job ..\n");
OUTL (nc_dsa, CCB_PHYS (cp, phys));
OUTL (nc_dsp, NCB_SCRIPTH_PHYS (np, getcc));
return;
};
/*
** no job, resume normal processing
*/
if (DEBUG_FLAGS & DEBUG_RESTART) printf (" -- remove trap\n");
np->script->start0[0] = cpu_to_scr(SCR_INT ^ IFFALSE (0));
break;
case SIR_SENSE_FAILED:
/*-------------------------------------------
** While trying to select for
** getting the condition code,
** a target reselected us.
**-------------------------------------------
*/
if (DEBUG_FLAGS & DEBUG_RESTART) {
PRINT_ADDR(cp->cmd);
printf ("in getcc reselect by t%d.\n",
(int)INB(nc_ssid) & 0x0f);
}
/*
** Mark this job
*/
cp->host_status = HS_BUSY;
cp->scsi_status = S_CHECK_COND;
np->target[cp->cmd->target].hold_cp = cp;
/*
** And patch code to restart it.
*/
np->script->start0[0] = cpu_to_scr(SCR_INT);
break;
/*-----------------------------------------------------------------------------
**
** Was Sie schon immer ueber transfermode negotiation wissen wollten ...
**
** We try to negotiate sync and wide transfer only after
** a successfull inquire command. We look at byte 7 of the
** inquire data to determine the capabilities of the target.
**
** When we try to negotiate, we append the negotiation message
** to the identify and (maybe) simple tag message.
** The host status field is set to HS_NEGOTIATE to mark this
** situation.
**
** If the target doesn't answer this message immidiately
** (as required by the standard), the SIR_NEGO_FAIL interrupt
** will be raised eventually.
** The handler removes the HS_NEGOTIATE status, and sets the
** negotiated value to the default (async / nowide).
**
** If we receive a matching answer immediately, we check it
** for validity, and set the values.
**
** If we receive a Reject message immediately, we assume the
** negotiation has failed, and fall back to standard values.
**
** If we receive a negotiation message while not in HS_NEGOTIATE
** state, it's a target initiated negotiation. We prepare a
** (hopefully) valid answer, set our parameters, and send back
** this answer to the target.
**
** If the target doesn't fetch the answer (no message out phase),
** we assume the negotiation has failed, and fall back to default
** settings.
**
** When we set the values, we adjust them in all ccbs belonging
** to this target, in the controller's register, and in the "phys"
** field of the controller's struct ncb.
**
** Possible cases: hs sir msg_in value send goto
** We try to negotiate:
** -> target doesnt't msgin NEG FAIL noop defa. - dispatch
** -> target rejected our msg NEG FAIL reject defa. - dispatch
** -> target answered (ok) NEG SYNC sdtr set - clrack
** -> target answered (!ok) NEG SYNC sdtr defa. REJ--->msg_bad
** -> target answered (ok) NEG WIDE wdtr set - clrack
** -> target answered (!ok) NEG WIDE wdtr defa. REJ--->msg_bad
** -> any other msgin NEG FAIL noop defa. - dispatch
**
** Target tries to negotiate:
** -> incoming message --- SYNC sdtr set SDTR -
** -> incoming message --- WIDE wdtr set WDTR -
** We sent our answer:
** -> target doesn't msgout --- PROTO ? defa. - dispatch
**
**-----------------------------------------------------------------------------
*/
case SIR_NEGO_FAILED:
/*-------------------------------------------------------
**
** Negotiation failed.
** Target doesn't send an answer message,
** or target rejected our message.
**
** Remove negotiation request.
**
**-------------------------------------------------------
*/
OUTB (HS_PRT, HS_BUSY);
/* fall through */
case SIR_NEGO_PROTO:
/*-------------------------------------------------------
**
** Negotiation failed.
** Target doesn't fetch the answer message.
**
**-------------------------------------------------------
*/
if (DEBUG_FLAGS & DEBUG_NEGO) {
PRINT_ADDR(cp->cmd);
printf ("negotiation failed sir=%x status=%x.\n",
num, cp->nego_status);
};
/*
** any error in negotiation:
** fall back to default mode.
*/
switch (cp->nego_status) {
case NS_SYNC:
ncr_setsync (np, cp, 0, 0xe0);
break;
case NS_WIDE:
ncr_setwide (np, cp, 0, 0);
break;
};
np->msgin [0] = M_NOOP;
np->msgout[0] = M_NOOP;
cp->nego_status = 0;
OUTL (nc_dsp, NCB_SCRIPT_PHYS (np, dispatch));
break;
case SIR_NEGO_SYNC:
/*
** Synchronous request message received.
*/
if (DEBUG_FLAGS & DEBUG_NEGO) {
PRINT_ADDR(cp->cmd);
printf ("sync msgin: ");
(void) ncr_show_msg (np->msgin);
printf (".\n");
};
/*
** get requested values.
*/
chg = 0;
per = np->msgin[3];
ofs = np->msgin[4];
if (ofs==0) per=255;
/*
** if target sends SDTR message,
** it CAN transfer synch.
*/
if (ofs)
tp->inqdata[7] |= INQ7_SYNC;
/*
** check values against driver limits.
*/
if (per < np->minsync)
{chg = 1; per = np->minsync;}
if (per < tp->minsync)
{chg = 1; per = tp->minsync;}
if (ofs > tp->maxoffs)
{chg = 1; ofs = tp->maxoffs;}
/*
** Check against controller limits.
*/
fak = 7;
scntl3 = 0;
if (ofs != 0) {
ncr_getsync(np, per, &fak, &scntl3);
if (fak > 7) {
chg = 1;
ofs = 0;
}
}
if (ofs == 0) {
fak = 7;
per = 0;
scntl3 = 0;
tp->minsync = 0;
}
if (DEBUG_FLAGS & DEBUG_NEGO) {
PRINT_ADDR(cp->cmd);
printf ("sync: per=%d scntl3=0x%x ofs=%d fak=%d chg=%d.\n",
per, scntl3, ofs, fak, chg);
}
if (INB (HS_PRT) == HS_NEGOTIATE) {
OUTB (HS_PRT, HS_BUSY);
switch (cp->nego_status) {
case NS_SYNC:
/*
** This was an answer message
*/
if (chg) {
/*
** Answer wasn't acceptable.
*/
ncr_setsync (np, cp, 0, 0xe0);
OUTL (nc_dsp, NCB_SCRIPT_PHYS (np, msg_bad));
} else {
/*
** Answer is ok.
*/
ncr_setsync (np, cp, scntl3, (fak<<5)|ofs);
OUTL (nc_dsp, NCB_SCRIPT_PHYS (np, clrack));
};
return;
case NS_WIDE:
ncr_setwide (np, cp, 0, 0);
break;
};
};
/*
** It was a request.
** Check against the table of target capabilities.
** If target not capable force M_REJECT and asynchronous.
*/
if (np->unit < SCSI_NCR_MAX_HOST) {
tp->inqdata[7] &=
(target_capabilities[np->unit].and_map[target]);
if (!(tp->inqdata[7] & INQ7_SYNC)) {
ofs = 0;
fak = 7;
}
}
/*
** It was a request. Set value and
** prepare an answer message
*/
ncr_setsync (np, cp, scntl3, (fak<<5)|ofs);
np->msgout[0] = M_EXTENDED;
np->msgout[1] = 3;
np->msgout[2] = M_X_SYNC_REQ;
np->msgout[3] = per;
np->msgout[4] = ofs;
cp->nego_status = NS_SYNC;
if (DEBUG_FLAGS & DEBUG_NEGO) {
PRINT_ADDR(cp->cmd);
printf ("sync msgout: ");
(void) ncr_show_msg (np->msgout);
printf (".\n");
}
if (!ofs) {
OUTL (nc_dsp, NCB_SCRIPT_PHYS (np, msg_bad));
return;
}
np->msgin [0] = M_NOOP;
break;
case SIR_NEGO_WIDE:
/*
** Wide request message received.
*/
if (DEBUG_FLAGS & DEBUG_NEGO) {
PRINT_ADDR(cp->cmd);
printf ("wide msgin: ");
(void) ncr_show_msg (np->msgin);
printf (".\n");
};
/*
** get requested values.
*/
chg = 0;
wide = np->msgin[3];
/*
** if target sends WDTR message,
** it CAN transfer wide.
*/
if (wide)
tp->inqdata[7] |= INQ7_WIDE16;
/*
** check values against driver limits.
*/
if (wide > tp->usrwide)
{chg = 1; wide = tp->usrwide;}
if (DEBUG_FLAGS & DEBUG_NEGO) {
PRINT_ADDR(cp->cmd);
printf ("wide: wide=%d chg=%d.\n", wide, chg);
}
if (INB (HS_PRT) == HS_NEGOTIATE) {
OUTB (HS_PRT, HS_BUSY);
switch (cp->nego_status) {
case NS_WIDE:
/*
** This was an answer message
*/
if (chg) {
/*
** Answer wasn't acceptable.
*/
ncr_setwide (np, cp, 0, 1);
OUTL (nc_dsp, NCB_SCRIPT_PHYS (np, msg_bad));
} else {
/*
** Answer is ok.
*/
ncr_setwide (np, cp, wide, 1);
OUTL (nc_dsp, NCB_SCRIPT_PHYS (np, clrack));
};
return;
case NS_SYNC:
ncr_setsync (np, cp, 0, 0xe0);
break;
};
};
/*
** It was a request, set value and
** prepare an answer message
*/
ncr_setwide (np, cp, wide, 1);
np->msgout[0] = M_EXTENDED;
np->msgout[1] = 2;
np->msgout[2] = M_X_WIDE_REQ;
np->msgout[3] = wide;
np->msgin [0] = M_NOOP;
cp->nego_status = NS_WIDE;
if (DEBUG_FLAGS & DEBUG_NEGO) {
PRINT_ADDR(cp->cmd);
printf ("wide msgout: ");
(void) ncr_show_msg (np->msgin);
printf (".\n");
}
break;
/*--------------------------------------------------------------------
**
** Processing of special messages
**
**--------------------------------------------------------------------
*/
case SIR_REJECT_RECEIVED:
/*-----------------------------------------------
**
** We received a M_REJECT message.
**
**-----------------------------------------------
*/
PRINT_ADDR(cp->cmd);
printf ("M_REJECT received (%x:%x).\n",
(unsigned)scr_to_cpu(np->lastmsg), np->msgout[0]);
break;
case SIR_REJECT_SENT:
/*-----------------------------------------------
**
** We received an unknown message
**
**-----------------------------------------------
*/
PRINT_ADDR(cp->cmd);
printf ("M_REJECT sent for ");
(void) ncr_show_msg (np->msgin);
printf (".\n");
break;
/*--------------------------------------------------------------------
**
** Processing of special messages
**
**--------------------------------------------------------------------
*/
case SIR_IGN_RESIDUE:
/*-----------------------------------------------
**
** We received an IGNORE RESIDUE message,
** which couldn't be handled by the script.
**
**-----------------------------------------------
*/
PRINT_ADDR(cp->cmd);
printf ("M_IGN_RESIDUE received, but not yet implemented.\n");
break;
case SIR_MISSING_SAVE:
/*-----------------------------------------------
**
** We received an DISCONNECT message,
** but the datapointer wasn't saved before.
**
**-----------------------------------------------
*/
PRINT_ADDR(cp->cmd);
printf ("M_DISCONNECT received, but datapointer not saved: "
"data=%x save=%x goal=%x.\n",
(unsigned) INL (nc_temp),
(unsigned) scr_to_cpu(np->header.savep),
(unsigned) scr_to_cpu(np->header.goalp));
break;
#if 0 /* This stuff does not work */
/*--------------------------------------------------------------------
**
** Processing of a "S_QUEUE_FULL" status.
**
** The current command has been rejected,
** because there are too many in the command queue.
** We have started too many commands for that target.
**
** If possible, reinsert at head of queue.
** Stall queue until there are no disconnected jobs
** (ncr is REALLY idle). Then restart processing.
**
** We should restart the current job after the controller
** has become idle. But this is not yet implemented.
**
**--------------------------------------------------------------------
*/
case SIR_STALL_QUEUE:
/*-----------------------------------------------
**
** Stall the start queue.
**
**-----------------------------------------------
*/
PRINT_ADDR(cp->cmd);
printf ("queue full.\n");
np->script->start1[0] = cpu_to_scr(SCR_INT);
/*
** Try to disable tagged transfers.
*/
ncr_setmaxtags (np, &np->target[target], 0);
/*
** @QUEUE@
**
** Should update the launch field of the
** current job to be able to restart it.
** Then prepend it to the start queue.
*/
/* fall through */
case SIR_STALL_RESTART:
/*-----------------------------------------------
**
** Enable selecting again,
** if NO disconnected jobs.
**
**-----------------------------------------------
*/
/*
** Look for a disconnected job.
*/
cp = np->ccb;
while (cp && cp->host_status != HS_DISCONNECT)
cp = cp->link_ccb;
/*
** if there is one, ...
*/
if (cp) {
/*
** wait for reselection
*/
OUTL (nc_dsp, NCB_SCRIPT_PHYS (np, reselect));
return;
};
/*
** else remove the interrupt.
*/
printf ("%s: queue empty.\n", ncr_name (np));
np->script->start1[0] = cpu_to_scr(SCR_INT ^ IFFALSE (0));
break;
#endif /* This stuff does not work */
};
out:
OUTONB (nc_dcntl, (STD|NOCOM));
}
/*==========================================================
**
**
** Aquire a control block
**
**
**==========================================================
*/
static ccb_p ncr_get_ccb
(ncb_p np, u_long target, u_long lun)
{
lcb_p lp;
ccb_p cp = (ccb_p) 0;
/*
** Lun structure available ?
*/
lp = np->target[target].lp[lun];
if (lp && lp->opennings && (!lp->active || lp->active < lp->reqlink)) {
cp = lp->next_ccb;
/*
** Look for free CCB
*/
while (cp && cp->magic) cp = cp->next_ccb;
/*
** Increment active commands and decrement credit.
*/
if (cp) {
++lp->active;
--lp->opennings;
}
}
/*
** if nothing available, take the default.
** DANGEROUS, because this ccb is not suitable for
** reselection.
** If lp->actccbs > 0 wait for a suitable ccb to be free.
*/
if ((!cp) && lp && lp->actccbs > 0)
return ((ccb_p) 0);
if (!cp) cp = np->ccb;
/*
** Wait until available.
*/
#if 0
while (cp->magic) {
if (flags & SCSI_NOSLEEP) break;
if (tsleep ((caddr_t)cp, PRIBIO|PCATCH, "ncr", 0))
break;
};
#endif
if (cp->magic)
return ((ccb_p) 0);
cp->magic = 1;
return (cp);
}
/*==========================================================
**
**
** Release one control block
**
**
**==========================================================
*/
void ncr_free_ccb (ncb_p np, ccb_p cp, u_long target, u_long lun)
{
lcb_p lp;
/*
** sanity
*/
assert (cp != NULL);
/*
** Decrement active commands and increment credit.
*/
lp = np->target[target].lp[lun];
if (lp) {
--lp->active;
++lp->opennings;
}
cp -> host_status = HS_IDLE;
cp -> magic = 0;
#if 0
if (cp == np->ccb)
wakeup ((caddr_t) cp);
#endif
}
/*==========================================================
**
**
** Allocation of resources for Targets/Luns/Tags.
**
**
**==========================================================
*/
static void ncr_alloc_ccb (ncb_p np, u_long target, u_long lun)
{
tcb_p tp;
lcb_p lp;
ccb_p cp;
assert (np != NULL);
if (target>=MAX_TARGET) return;
if (lun >=MAX_LUN ) return;
tp=&np->target[target];
if (!tp->jump_tcb.l_cmd) {
/*
** initialize it.
*/
tp->jump_tcb.l_cmd =
cpu_to_scr((SCR_JUMP^IFFALSE (DATA (0x80 + target))));
tp->jump_tcb.l_paddr = np->jump_tcb.l_paddr;
tp->getscr[0] = (np->features & FE_PFEN) ?
cpu_to_scr(SCR_COPY(1)):cpu_to_scr(SCR_COPY_F(1));
tp->getscr[1] = cpu_to_scr(vtophys (&tp->sval));
tp->getscr[2] =
cpu_to_scr(np->paddr + offsetof (struct ncr_reg, nc_sxfer));
tp->getscr[3] = (np->features & FE_PFEN) ?
cpu_to_scr(SCR_COPY(1)):cpu_to_scr(SCR_COPY_F(1));
tp->getscr[4] = cpu_to_scr(vtophys (&tp->wval));
tp->getscr[5] =
cpu_to_scr(np->paddr + offsetof (struct ncr_reg, nc_scntl3));
assert (( (offsetof(struct ncr_reg, nc_sxfer) ^
offsetof(struct tcb , sval )) &3) == 0);
assert (( (offsetof(struct ncr_reg, nc_scntl3) ^
offsetof(struct tcb , wval )) &3) == 0);
tp->call_lun.l_cmd = cpu_to_scr(SCR_CALL);
tp->call_lun.l_paddr =
cpu_to_scr(NCB_SCRIPT_PHYS (np, resel_lun));
tp->jump_lcb.l_cmd = cpu_to_scr(SCR_JUMP);
tp->jump_lcb.l_paddr = cpu_to_scr(NCB_SCRIPTH_PHYS (np, abort));
np->jump_tcb.l_paddr = cpu_to_scr(vtophys (&tp->jump_tcb));
}
/*
** Logic unit control block
*/
lp = tp->lp[lun];
if (!lp) {
/*
** Allocate a lcb
*/
lp = (lcb_p) m_alloc (sizeof (struct lcb), LCB_ALIGN_SHIFT);
if (!lp) return;
if (DEBUG_FLAGS & DEBUG_ALLOC) {
PRINT_LUN(np, target, lun);
printf ("new lcb @%p.\n", lp);
}
/*
** Initialize it
*/
bzero (lp, sizeof (*lp));
lp->jump_lcb.l_cmd =
cpu_to_scr(SCR_JUMP ^ IFFALSE (DATA (lun)));
lp->jump_lcb.l_paddr = tp->jump_lcb.l_paddr;
lp->call_tag.l_cmd = cpu_to_scr(SCR_CALL);
lp->call_tag.l_paddr =
cpu_to_scr(NCB_SCRIPT_PHYS (np, resel_tag));
lp->jump_ccb.l_cmd = cpu_to_scr(SCR_JUMP);
lp->jump_ccb.l_paddr =
cpu_to_scr(NCB_SCRIPTH_PHYS (np, aborttag));
lp->actlink = 1;
lp->active = 1;
/*
** Chain into LUN list
*/
tp->jump_lcb.l_paddr = cpu_to_scr(vtophys (&lp->jump_lcb));
tp->lp[lun] = lp;
ncr_setmaxtags (np, tp, driver_setup.default_tags);
}
/*
** Allocate ccbs up to lp->reqccbs.
*/
/*
** Limit possible number of ccbs.
**
** If tagged command queueing is enabled,
** can use more than one ccb.
*/
if (np->actccbs >= MAX_START-2) return;
if (lp->actccbs && (lp->actccbs >= lp->reqccbs))
return;
/*
** Allocate a ccb
*/
cp = (ccb_p) m_alloc (sizeof (struct ccb), CCB_ALIGN_SHIFT);
if (!cp)
return;
if (DEBUG_FLAGS & DEBUG_ALLOC) {
PRINT_LUN(np, target, lun);
printf ("new ccb @%p.\n", cp);
}
/*
** Count it
*/
lp->actccbs++;
np->actccbs++;
/*
** Initialize it
*/
bzero (cp, sizeof (*cp));
/*
** Fill in physical addresses
*/
cp->p_ccb = vtophys (cp);
/*
** Chain into reselect list
*/
cp->jump_ccb.l_cmd = cpu_to_scr(SCR_JUMP);
cp->jump_ccb.l_paddr = lp->jump_ccb.l_paddr;
lp->jump_ccb.l_paddr = cpu_to_scr(CCB_PHYS (cp, jump_ccb));
cp->call_tmp.l_cmd = cpu_to_scr(SCR_CALL);
cp->call_tmp.l_paddr = cpu_to_scr(NCB_SCRIPT_PHYS (np, resel_tmp));
/*
** Chain into wakeup list
*/
cp->link_ccb = np->ccb->link_ccb;
np->ccb->link_ccb = cp;
/*
** Chain into CCB list
*/
cp->next_ccb = lp->next_ccb;
lp->next_ccb = cp;
}
/*==========================================================
**
**
** Announce the number of ccbs/tags to the scsi driver.
**
**
**==========================================================
*/
static void ncr_opennings (ncb_p np, lcb_p lp, Scsi_Cmnd * cmd)
{
/*
** want to reduce the number ...
*/
if (lp->actlink > lp->reqlink) {
/*
** Try to reduce the count.
** We assume to run at splbio ..
*/
u_char diff = lp->actlink - lp->reqlink;
if (!diff) return;
if (diff > lp->opennings)
diff = lp->opennings;
lp->opennings -= diff;
lp->actlink -= diff;
if (DEBUG_FLAGS & DEBUG_TAGS)
printf ("%s: actlink: diff=%d, new=%d, req=%d\n",
ncr_name(np), diff, lp->actlink, lp->reqlink);
return;
};
/*
** want to increase the number ?
*/
if (lp->reqlink > lp->actlink) {
u_char diff = lp->reqlink - lp->actlink;
lp->opennings += diff;
lp->actlink += diff;
#if 0
wakeup ((caddr_t) xp->sc_link);
#endif
if (DEBUG_FLAGS & DEBUG_TAGS)
printf ("%s: actlink: diff=%d, new=%d, req=%d\n",
ncr_name(np), diff, lp->actlink, lp->reqlink);
};
}
/*==========================================================
**
**
** Build Scatter Gather Block
**
**
**==========================================================
**
** The transfer area may be scattered among
** several non adjacent physical pages.
**
** We may use MAX_SCATTER blocks.
**
**----------------------------------------------------------
*/
/*
** We try to reduce the number of interrupts caused
** by unexpected phase changes due to disconnects.
** A typical harddisk may disconnect before ANY block.
** If we wanted to avoid unexpected phase changes at all
** we had to use a break point every 512 bytes.
** Of course the number of scatter/gather blocks is
** limited.
** Under Linux, the scatter/gatter blocks are provided by
** the generic driver. We just have to copy addresses and
** sizes to the data segment array.
*/
static int ncr_scatter(ccb_p cp, Scsi_Cmnd *cmd)
{
struct scr_tblmove *data;
int segment = 0;
int use_sg = (int) cmd->use_sg;
#if 0
bzero (cp->phys.data, sizeof (cp->phys.data));
#endif
data = cp->phys.data;
cp->data_len = 0;
if (!use_sg) {
if (cmd->request_bufflen) {
data = &data[MAX_SCATTER - 1];
data[0].addr = cpu_to_scr(vtophys(cmd->request_buffer));
data[0].size = cpu_to_scr(cmd->request_bufflen);
cp->data_len = cmd->request_bufflen;
segment = 1;
}
}
else if (use_sg <= MAX_SCATTER) {
struct scatterlist *scatter = (struct scatterlist *)cmd->buffer;
data = &data[MAX_SCATTER - use_sg];
while (segment < use_sg) {
data[segment].addr =
cpu_to_scr(vtophys(scatter[segment].address));
data[segment].size =
cpu_to_scr(scatter[segment].length);
cp->data_len += scatter[segment].length;
++segment;
}
}
else {
return -1;
}
return segment;
}
/*==========================================================
**
**
** Test the pci bus snoop logic :-(
**
** Has to be called with interrupts disabled.
**
**
**==========================================================
*/
#ifndef NCR_IOMAPPED
__initfunc(
static int ncr_regtest (struct ncb* np)
)
{
register volatile u_long data;
/*
** ncr registers may NOT be cached.
** write 0xffffffff to a read only register area,
** and try to read it back.
*/
data = 0xffffffff;
OUTL_OFF(offsetof(struct ncr_reg, nc_dstat), data);
data = INL_OFF(offsetof(struct ncr_reg, nc_dstat));
#if 1
if (data == 0xffffffff) {
#else
if ((data & 0xe2f0fffd) != 0x02000080) {
#endif
printf ("CACHE TEST FAILED: reg dstat-sstat2 readback %x.\n",
(unsigned) data);
return (0x10);
};
return (0);
}
#endif
__initfunc(
static int ncr_snooptest (struct ncb* np)
)
{
u_long ncr_rd, ncr_wr, ncr_bk, host_rd, host_wr, pc, err=0;
int i;
#ifndef NCR_IOMAPPED
if (np->reg) {
err |= ncr_regtest (np);
if (err) return (err);
}
#endif
/*
** init
*/
pc = NCB_SCRIPTH_PHYS (np, snooptest);
host_wr = 1;
ncr_wr = 2;
/*
** Set memory and register.
*/
np->ncr_cache = cpu_to_scr(host_wr);
OUTL (nc_temp, ncr_wr);
/*
** Start script (exchange values)
*/
OUTL (nc_dsp, pc);
/*
** Wait 'til done (with timeout)
*/
for (i=0; i<NCR_SNOOP_TIMEOUT; i++)
if (INB(nc_istat) & (INTF|SIP|DIP))
break;
/*
** Save termination position.
*/
pc = INL (nc_dsp);
/*
** Read memory and register.
*/
host_rd = scr_to_cpu(np->ncr_cache);
ncr_rd = INL (nc_scratcha);
ncr_bk = INL (nc_temp);
/*
** Reset ncr chip
*/
OUTB (nc_istat, SRST);
DELAY (1000);
OUTB (nc_istat, 0 );
/*
** check for timeout
*/
if (i>=NCR_SNOOP_TIMEOUT) {
printf ("CACHE TEST FAILED: timeout.\n");
return (0x20);
};
/*
** Check termination position.
*/
if (pc != NCB_SCRIPTH_PHYS (np, snoopend)+8) {
printf ("CACHE TEST FAILED: script execution failed.\n");
printf ("start=%08lx, pc=%08lx, end=%08lx\n",
(u_long) NCB_SCRIPTH_PHYS (np, snooptest), pc,
(u_long) NCB_SCRIPTH_PHYS (np, snoopend) +8);
return (0x40);
};
/*
** Show results.
*/
if (host_wr != ncr_rd) {
printf ("CACHE TEST FAILED: host wrote %d, ncr read %d.\n",
(int) host_wr, (int) ncr_rd);
err |= 1;
};
if (host_rd != ncr_wr) {
printf ("CACHE TEST FAILED: ncr wrote %d, host read %d.\n",
(int) ncr_wr, (int) host_rd);
err |= 2;
};
if (ncr_bk != ncr_wr) {
printf ("CACHE TEST FAILED: ncr wrote %d, read back %d.\n",
(int) ncr_wr, (int) ncr_bk);
err |= 4;
};
return (err);
}
/*==========================================================
**
**
** Profiling the drivers and targets performance.
**
**
**==========================================================
*/
#ifdef SCSI_NCR_PROFILE_SUPPORT
/*
** Compute the difference in jiffies ticks.
*/
#define ncr_delta(from, to) \
( ((to) && (from))? (to) - (from) : -1 )
#define PROFILE cp->phys.header.stamp
static void ncb_profile (ncb_p np, ccb_p cp)
{
int co, st, en, di, se, post,work,disc;
u_long diff;
PROFILE.end = jiffies;
st = ncr_delta (PROFILE.start,PROFILE.status);
if (st<0) return; /* status not reached */
co = ncr_delta (PROFILE.start,PROFILE.command);
if (co<0) return; /* command not executed */
en = ncr_delta (PROFILE.start,PROFILE.end),
di = ncr_delta (PROFILE.start,PROFILE.disconnect),
se = ncr_delta (PROFILE.start,PROFILE.select);
post = en - st;
/*
** @PROFILE@ Disconnect time invalid if multiple disconnects
*/
if (di>=0) disc = se-di; else disc = 0;
work = (st - co) - disc;
diff = (np->disc_phys - np->disc_ref) & 0xff;
np->disc_ref += diff;
np->profile.num_trans += 1;
if (cp->cmd) {
np->profile.num_kbytes += (cp->cmd->request_bufflen >> 10);
np->profile.rest_bytes += (cp->cmd->request_bufflen & (0x400-1));
if (np->profile.rest_bytes >= 0x400) {
++np->profile.num_kbytes;
np->profile.rest_bytes -= 0x400;
}
}
np->profile.num_disc += diff;
np->profile.ms_setup += co;
np->profile.ms_data += work;
np->profile.ms_disc += disc;
np->profile.ms_post += post;
}
#undef PROFILE
#endif /* SCSI_NCR_PROFILE_SUPPORT */
/*==========================================================
**
**
** Device lookup.
**
** @GENSCSI@ should be integrated to scsiconf.c
**
**
**==========================================================
*/
struct table_entry {
char * manufacturer;
char * model;
char * version;
u_long info;
};
static struct table_entry device_tab[] =
{
#ifdef NCR_GETCC_WITHMSG
{"", "", "", QUIRK_NOMSG},
{"SONY", "SDT-5000", "3.17", QUIRK_NOMSG},
{"WangDAT", "Model 2600", "01.7", QUIRK_NOMSG},
{"WangDAT", "Model 3200", "02.2", QUIRK_NOMSG},
{"WangDAT", "Model 1300", "02.4", QUIRK_NOMSG},
#endif
{"", "", "", 0} /* catch all: must be last entry. */
};
static u_long ncr_lookup(char * id)
{
struct table_entry * p = device_tab;
char *d, *r, c;
for (;;p++) {
d = id+8;
r = p->manufacturer;
while ((c=*r++)) if (c!=*d++) break;
if (c) continue;
d = id+16;
r = p->model;
while ((c=*r++)) if (c!=*d++) break;
if (c) continue;
d = id+32;
r = p->version;
while ((c=*r++)) if (c!=*d++) break;
if (c) continue;
return (p->info);
}
}
/*==========================================================
**
** Determine the ncr's clock frequency.
** This is essential for the negotiation
** of the synchronous transfer rate.
**
**==========================================================
**
** Note: we have to return the correct value.
** THERE IS NO SAVE DEFAULT VALUE.
**
** Most NCR/SYMBIOS boards are delivered with a 40 Mhz clock.
** 53C860 and 53C875 rev. 1 support fast20 transfers but
** do not have a clock doubler and so are provided with a
** 80 MHz clock. All other fast20 boards incorporate a doubler
** and so should be delivered with a 40 MHz clock.
** The future fast40 chips (895/895) use a 40 Mhz base clock
** and provide a clock quadrupler (160 Mhz). The code below
** tries to deal as cleverly as possible with all this stuff.
**
**----------------------------------------------------------
*/
/*
* Select NCR SCSI clock frequency
*/
static void ncr_selectclock(ncb_p np, u_char scntl3)
{
if (np->multiplier < 2) {
OUTB(nc_scntl3, scntl3);
return;
}
if (bootverbose >= 2)
printf ("%s: enabling clock multiplier\n", ncr_name(np));
OUTB(nc_stest1, DBLEN); /* Enable clock multiplier */
if (np->multiplier > 2) { /* Poll bit 5 of stest4 for quadrupler */
int i = 20;
while (!(INB(nc_stest4) & LCKFRQ) && --i > 0)
DELAY(20);
if (!i)
printf("%s: the chip cannot lock the frequency\n", ncr_name(np));
} else /* Wait 20 micro-seconds for doubler */
DELAY(20);
OUTB(nc_stest3, HSC); /* Halt the scsi clock */
OUTB(nc_scntl3, scntl3);
OUTB(nc_stest1, (DBLEN|DBLSEL));/* Select clock multiplier */
OUTB(nc_stest3, 0x00|TE); /* Restart scsi clock */
}
/*
* calculate NCR SCSI clock frequency (in KHz)
*/
__initfunc(
static unsigned ncrgetfreq (ncb_p np, int gen)
)
{
unsigned ms = 0;
/*
* Measure GEN timer delay in order
* to calculate SCSI clock frequency
*
* This code will never execute too
* many loop iterations (if DELAY is
* reasonably correct). It could get
* too low a delay (too high a freq.)
* if the CPU is slow executing the
* loop for some reason (an NMI, for
* example). For this reason we will
* if multiple measurements are to be
* performed trust the higher delay
* (lower frequency returned).
*/
OUTB (nc_stest1, 0); /* make sure clock doubler is OFF */
OUTW (nc_sien , 0); /* mask all scsi interrupts */
(void) INW (nc_sist); /* clear pending scsi interrupt */
OUTB (nc_dien , 0); /* mask all dma interrupts */
(void) INW (nc_sist); /* another one, just to be sure :) */
OUTB (nc_scntl3, 4); /* set pre-scaler to divide by 3 */
OUTB (nc_stime1, 0); /* disable general purpose timer */
OUTB (nc_stime1, gen); /* set to nominal delay of 1<<gen * 125us */
while (!(INW(nc_sist) & GEN) && ms++ < 100000)
DELAY(1000); /* count ms */
OUTB (nc_stime1, 0); /* disable general purpose timer */
/*
* set prescaler to divide by whatever 0 means
* 0 ought to choose divide by 2, but appears
* to set divide by 3.5 mode in my 53c810 ...
*/
OUTB (nc_scntl3, 0);
if (bootverbose >= 2)
printf ("%s: Delay (GEN=%d): %u msec\n", ncr_name(np), gen, ms);
/*
* adjust for prescaler, and convert into KHz
*/
return ms ? ((1 << gen) * 4340) / ms : 0;
}
/*
* Get/probe NCR SCSI clock frequency
*/
__initfunc(
static void ncr_getclock (ncb_p np, int mult)
)
{
unsigned char scntl3 = INB(nc_scntl3);
unsigned char stest1 = INB(nc_stest1);
unsigned f1;
np->multiplier = 1;
f1 = 40000;
/*
** True with 875 or 895 with clock multiplier selected
*/
if (mult > 1 && (stest1 & (DBLEN+DBLSEL)) == DBLEN+DBLSEL) {
if (bootverbose >= 2)
printf ("%s: clock multiplier found\n", ncr_name(np));
np->multiplier = mult;
}
/*
** If multiplier not found or scntl3 not 7,5,3,
** reset chip and get frequency from general purpose timer.
** Otherwise trust scntl3 BIOS setting.
*/
if (np->multiplier != mult || (scntl3 & 7) < 3 || !(scntl3 & 1)) {
unsigned f2;
OUTB(nc_istat, SRST); DELAY(5); OUTB(nc_istat, 0);
(void) ncrgetfreq (np, 11); /* throw away first result */
f1 = ncrgetfreq (np, 11);
f2 = ncrgetfreq (np, 11);
if (bootverbose)
printf ("%s: NCR clock is %uKHz, %uKHz\n", ncr_name(np), f1, f2);
if (f1 > f2) f1 = f2; /* trust lower result */
if (f1 < 45000) f1 = 40000;
else if (f1 < 55000) f1 = 50000;
else f1 = 80000;
if (f1 < 80000 && mult > 1) {
if (bootverbose >= 2)
printf ("%s: clock multiplier assumed\n", ncr_name(np));
np->multiplier = mult;
}
} else {
if ((scntl3 & 7) == 3) f1 = 40000;
else if ((scntl3 & 7) == 5) f1 = 80000;
else f1 = 160000;
f1 /= np->multiplier;
}
/*
** Compute controller synchronous parameters.
*/
f1 *= np->multiplier;
np->clock_khz = f1;
}
/*===================== LINUX ENTRY POINTS SECTION ==========================*/
#ifndef uchar
#define uchar unsigned char
#endif
#ifndef ushort
#define ushort unsigned short
#endif
#ifndef ulong
#define ulong unsigned long
#endif
/* ---------------------------------------------------------------------
**
** Driver setup from the boot command line
**
** ---------------------------------------------------------------------
*/
__initfunc(
void ncr53c8xx_setup(char *str, int *ints)
)
{
#ifdef SCSI_NCR_BOOT_COMMAND_LINE_SUPPORT
char *cur = str;
char *pc, *pv;
int val;
int base;
int c;
while (cur != NULL && (pc = strchr(cur, ':')) != NULL) {
val = 0;
pv = pc;
c = *++pv;
if (c == 'n')
val = 0;
else if (c == 'y')
val = 1;
else {
base = 0;
#if 0
if (c == '0') {
c = *pv++;
base = 8;
}
if (c == 'x') {
++pv;
base = 16;
}
else if (c >= '0' && c <= '9')
base = 10;
else
break;
#endif
val = (int) simple_strtoul(pv, NULL, base);
}
if (!strncmp(cur, "mpar:", 5))
driver_setup.master_parity = val;
else if (!strncmp(cur, "spar:", 5))
driver_setup.scsi_parity = val;
else if (!strncmp(cur, "disc:", 5))
driver_setup.disconnection = val;
else if (!strncmp(cur, "specf:", 6))
driver_setup.special_features = val;
else if (!strncmp(cur, "ultra:", 6))
driver_setup.ultra_scsi = val;
else if (!strncmp(cur, "fsn:", 4))
driver_setup.force_sync_nego = val;
else if (!strncmp(cur, "revprob:", 8))
driver_setup.reverse_probe = val;
else if (!strncmp(cur, "tags:", 5)) {
if (val > SCSI_NCR_MAX_TAGS)
val = SCSI_NCR_MAX_TAGS;
driver_setup.default_tags = val;
}
else if (!strncmp(cur, "sync:", 5))
driver_setup.default_sync = val;
else if (!strncmp(cur, "verb:", 5))
driver_setup.verbose = val;
else if (!strncmp(cur, "debug:", 6))
driver_setup.debug = val;
else if (!strncmp(cur, "burst:", 6))
driver_setup.burst_max = val;
else if (!strncmp(cur, "led:", 4))
driver_setup.led_pin = val;
else if (!strncmp(cur, "wide:", 5))
driver_setup.max_wide = val? 1:0;
else if (!strncmp(cur, "settle:", 7))
driver_setup.settle_delay= val;
else if (!strncmp(cur, "diff:", 5))
driver_setup.diff_support= val;
else if (!strncmp(cur, "irqm:", 5))
driver_setup.irqm = val;
else if (!strncmp(cur, "pcifix:", 7))
driver_setup.pci_fix_up = val;
else if (!strncmp(cur, "buschk:", 7))
driver_setup.bus_check = val;
#ifdef SCSI_NCR_NVRAM_SUPPORT
else if (!strncmp(cur, "nvram:", 6))
driver_setup.use_nvram = val;
#endif
else if (!strncmp(cur, "safe:", 5) && val)
memcpy(&driver_setup, &driver_safe_setup, sizeof(driver_setup));
else
printf("ncr53c8xx_setup: unexpected boot option '%.*s' ignored\n", (int)(pc-cur+1), cur);
#ifdef MODULE
if ((cur = strchr(cur, ' ')) != NULL)
#else
if ((cur = strchr(cur, ',')) != NULL)
#endif
++cur;
}
#endif /* SCSI_NCR_BOOT_COMMAND_LINE_SUPPORT */
}
static int ncr53c8xx_pci_init(Scsi_Host_Template *tpnt,
uchar bus, uchar device_fn, ncr_device *device);
/*
** Linux entry point for NCR53C8XX devices detection routine.
**
** Called by the middle-level scsi drivers at initialization time,
** or at module installation.
**
** Read the PCI configuration and try to attach each
** detected NCR board.
**
** If NVRAM is present, try to attach boards according to
** the used defined boot order.
**
** Returns the number of boards successfully attached.
*/
__initfunc(
static void ncr_print_driver_setup(void)
)
{
#define YesNo(y) y ? 'y' : 'n'
printk("ncr53c8xx: setup=disc:%c,specf:%d,ultra:%c,tags:%d,sync:%d,burst:%d,wide:%c,diff:%d\n",
YesNo(driver_setup.disconnection),
driver_setup.special_features,
YesNo(driver_setup.ultra_scsi),
driver_setup.default_tags,
driver_setup.default_sync,
driver_setup.burst_max,
YesNo(driver_setup.max_wide),
driver_setup.diff_support);
printk("ncr53c8xx: setup=mpar:%c,spar:%c,fsn=%c,verb:%d,debug:0x%x,led:%c,settle:%d,irqm:%d\n",
YesNo(driver_setup.master_parity),
YesNo(driver_setup.scsi_parity),
YesNo(driver_setup.force_sync_nego),
driver_setup.verbose,
driver_setup.debug,
YesNo(driver_setup.led_pin),
driver_setup.settle_delay,
driver_setup.irqm);
#undef YesNo
}
/*
** NCR53C8XX devices description table and chip ids list.
*/
static ncr_chip ncr_chip_table[] __initdata = SCSI_NCR_CHIP_TABLE;
static ushort ncr_chip_ids[] __initdata = SCSI_NCR_CHIP_IDS;
#ifdef SCSI_NCR_NVRAM_SUPPORT
__initfunc(
static int
ncr_attach_using_nvram(Scsi_Host_Template *tpnt, int nvram_index, int count, ncr_device device[])
)
{
int i, j;
int attach_count = 0;
ncr_nvram *nvram;
ncr_device *devp;
if (!nvram_index)
return 0;
/* find first Symbios NVRAM if there is one as we need to check it for host boot order */
for (i = 0, nvram_index = -1; i < count; i++) {
devp = &device[i];
nvram = devp->nvram;
if (!nvram)
continue;
if (nvram->type == SCSI_NCR_SYMBIOS_NVRAM) {
if (nvram_index == -1)
nvram_index = i;
#ifdef SCSI_NCR_DEBUG_NVRAM
printf("ncr53c8xx: NVRAM: Symbios format Boot Block, 53c%s, PCI bus %d, device %d, function %d\n",
devp->chip.name, devp->slot.bus,
(int) (devp->slot.device_fn & 0xf8) >> 3,
(int) devp->slot.device_fn & 7);
for (j = 0 ; j < 4 ; j++) {
Symbios_host *h = &nvram->data.Symbios.host[j];
printf("ncr53c8xx: BOOT[%d] device_id=%04x vendor_id=%04x device_fn=%02x io_port=%04x %s\n",
j, h->device_id, h->vendor_id,
h->device_fn, h->io_port,
(h->flags & SYMBIOS_INIT_SCAN_AT_BOOT) ? "SCAN AT BOOT" : "");
}
}
else if (nvram->type == SCSI_NCR_TEKRAM_NVRAM) {
/* display Tekram nvram data */
printf("ncr53c8xx: NVRAM: Tekram format data, 53c%s, PCI bus %d, device %d, function %d\n",
devp->chip.name, devp->slot.bus,
(int) (devp->slot.device_fn & 0xf8) >> 3,
(int) devp->slot.device_fn & 7);
#endif
}
}
if (nvram_index >= 0 && nvram_index < count)
nvram = device[nvram_index].nvram;
else
nvram = 0;
if (!nvram)
goto out;
/*
** check devices in the boot record against devices detected.
** attach devices if we find a match. boot table records that
** do not match any detected devices will be ignored.
** devices that do not match any boot table will not be attached
** here but will attempt to be attached during the device table
** rescan.
*/
for (i = 0; i < 4; i++) {
Symbios_host *h = &nvram->data.Symbios.host[i];
for (j = 0 ; j < count ; j++) {
devp = &device[j];
if (h->device_fn == devp->slot.device_fn &&
#if 0 /* bus number location in nvram ? */
h->bus == devp->slot.bus &&
#endif
h->device_id == devp->chip.device_id)
break;
}
if (j < count && !devp->attach_done) {
if (!ncr_attach (tpnt, attach_count, devp))
attach_count++;
devp->attach_done = 1;
}
}
out:
return attach_count;
}
#endif /* SCSI_NCR_NVRAM_SUPPORT */
__initfunc(
int ncr53c8xx_detect(Scsi_Host_Template *tpnt)
)
{
int i, j;
int chips;
int count = 0;
uchar bus, device_fn;
short index;
int attach_count = 0;
ncr_device device[8];
#ifdef SCSI_NCR_NVRAM_SUPPORT
ncr_nvram nvram[4];
int k, nvrams;
#endif
int hosts;
#ifdef SCSI_NCR_NVRAM_SUPPORT
int nvram_index = 0;
#endif
if (initverbose >= 2)
ncr_print_driver_setup();
#ifdef SCSI_NCR_DEBUG_INFO_SUPPORT
ncr_debug = driver_setup.debug;
#endif
#if LINUX_VERSION_CODE >= LinuxVersionCode(1,3,0)
tpnt->proc_dir = &proc_scsi_ncr53c8xx;
# ifdef SCSI_NCR_PROC_INFO_SUPPORT
tpnt->proc_info = ncr53c8xx_proc_info;
# endif
#endif
#if defined(SCSI_NCR_BOOT_COMMAND_LINE_SUPPORT) && defined(MODULE)
if (ncr53c8xx)
ncr53c8xx_setup(ncr53c8xx, (int *) 0);
#endif
/*
** Detect all 53c8xx hosts and then attach them.
**
** If we are using NVRAM, once all hosts are detected, we need to check
** any NVRAM for boot order in case detect and boot order differ and
** attach them using the order in the NVRAM.
**
** If no NVRAM is found or data appears invalid attach boards in the
** the order they are detected.
*/
if (!pcibios_present())
return 0;
chips = sizeof(ncr_chip_ids) / sizeof(ncr_chip_ids[0]);
hosts = sizeof(device) / sizeof(device[0]);
#ifdef SCSI_NCR_NVRAM_SUPPORT
k = 0;
if (driver_setup.use_nvram & 0x1)
nvrams = sizeof(nvram) / sizeof(nvram[0]);
else
nvrams = 0;
#endif
for (j = 0; j < chips ; ++j) {
i = driver_setup.reverse_probe ? chips-1 - j : j;
for (index = 0; ; index++) {
char *msg = "";
if ((pcibios_find_device(PCI_VENDOR_ID_NCR, ncr_chip_ids[i],
index, &bus, &device_fn)) ||
(count == hosts))
break;
#ifdef SCSI_NCR_NVRAM_SUPPORT
device[count].nvram = k < nvrams ? &nvram[k] : 0;
#else
device[count].nvram = 0;
#endif
if (ncr53c8xx_pci_init(tpnt, bus, device_fn, &device[count])) {
device[count].nvram = 0;
continue;
}
#ifdef SCSI_NCR_NVRAM_SUPPORT
if (device[count].nvram) {
++k;
nvram_index |= device[count].nvram->type;
switch (device[count].nvram->type) {
case SCSI_NCR_TEKRAM_NVRAM:
msg = "with Tekram NVRAM";
break;
case SCSI_NCR_SYMBIOS_NVRAM:
msg = "with Symbios NVRAM";
break;
default:
msg = "";
device[count].nvram = 0;
--k;
}
}
#endif
printf(KERN_INFO "ncr53c8xx: 53c%s detected %s\n",
device[count].chip.name, msg);
++count;
}
}
#ifdef SCSI_NCR_NVRAM_SUPPORT
attach_count = ncr_attach_using_nvram(tpnt, nvram_index, count, device);
#endif
/*
** rescan device list to make sure all boards attached.
** devices without boot records will not be attached yet
** so try to attach them here.
*/
for (i= 0; i < count; i++) {
if (!device[i].attach_done &&
!ncr_attach (tpnt, attach_count, &device[i])) {
attach_count++;
}
}
return attach_count;
}
/*
** Read and check the PCI configuration for any detected NCR
** boards and save data for attaching after all boards have
** been detected.
*/
__initfunc(
static int ncr53c8xx_pci_init(Scsi_Host_Template *tpnt,
uchar bus, uchar device_fn, ncr_device *device)
)
{
ushort vendor_id, device_id, command;
uchar cache_line_size, latency_timer;
uchar irq, revision;
#if LINUX_VERSION_CODE >= LinuxVersionCode(1,3,0)
uint base, base_2, io_port;
#else
ulong base, base_2;
#endif
int i;
#ifdef SCSI_NCR_NVRAM_SUPPORT
ncr_nvram *nvram = device->nvram;
#endif
ncr_chip *chip;
printk(KERN_INFO "ncr53c8xx: at PCI bus %d, device %d, function %d\n",
bus, (int) (device_fn & 0xf8) >> 3, (int) device_fn & 7);
/*
* Read info from the PCI config space.
* pcibios_read_config_xxx() functions are assumed to be used for
* successfully detected PCI devices.
* Expecting error conditions from them is just paranoia,
* thus void cast.
*/
(void) pcibios_read_config_word(bus, device_fn,
PCI_VENDOR_ID, &vendor_id);
(void) pcibios_read_config_word(bus, device_fn,
PCI_DEVICE_ID, &device_id);
(void) pcibios_read_config_word(bus, device_fn,
PCI_COMMAND, &command);
(void) pcibios_read_config_dword(bus, device_fn,
PCI_BASE_ADDRESS_0, &io_port);
(void) pcibios_read_config_dword(bus, device_fn,
PCI_BASE_ADDRESS_1, &base);
(void) pcibios_read_config_dword(bus, device_fn,
PCI_BASE_ADDRESS_2, &base_2);
(void) pcibios_read_config_byte(bus, device_fn,
PCI_CLASS_REVISION,&revision);
(void) pcibios_read_config_byte(bus, device_fn,
PCI_INTERRUPT_LINE, &irq);
(void) pcibios_read_config_byte(bus, device_fn,
PCI_CACHE_LINE_SIZE, &cache_line_size);
(void) pcibios_read_config_byte(bus, device_fn,
PCI_LATENCY_TIMER, &latency_timer);
/*
* Check if the chip is supported
*/
chip = 0;
for (i = 0; i < sizeof(ncr_chip_table)/sizeof(ncr_chip_table[0]); i++) {
if (device_id != ncr_chip_table[i].device_id)
continue;
if (revision > ncr_chip_table[i].revision_id)
continue;
chip = &device->chip;
memcpy(chip, &ncr_chip_table[i], sizeof(*chip));
chip->revision_id = revision;
break;
}
if (!chip) {
printk("ncr53c8xx: not initializing, device not supported\n");
return -1;
}
#ifdef __powerpc__
/*
* Severall fix-up for power/pc.
* Should not be performed by the driver.
*/
if ((command &
(PCI_COMMAND_MASTER|PCI_COMMAND_IO|PCI_COMMAND_MEMORY)) !=
(PCI_COMMAND_MASTER|PCI_COMMAND_IO|PCI_COMMAND_MEMORY)) {
printk("ncr53c8xx : setting PCI master/io/command bit\n");
command |= PCI_COMMAND_MASTER|PCI_COMMAND_IO|PCI_COMMAND_MEMORY;
pcibios_write_config_word(bus, device_fn, PCI_COMMAND, command);
}
if (io_port >= 0x10000000) {
io_port = (io_port & 0x00FFFFFF) | 0x01000000;
pcibios_write_config_dword(bus, device_fn, PCI_BASE_ADDRESS_0, io_port);
}
if (base >= 0x10000000) {
base = (base & 0x00FFFFFF) | 0x01000000;
pcibios_write_config_dword(bus, device_fn, PCI_BASE_ADDRESS_1, base);
}
#endif
/*
* Check availability of IO space, memory space and master capability.
*/
if (command & PCI_COMMAND_IO) {
if ((io_port & 3) != 1) {
printk("ncr53c8xx: disabling I/O mapping since base address 0 (0x%x)\n"
" bits 0..1 indicate a non-IO mapping\n", (int) io_port);
io_port = 0;
}
else
io_port &= PCI_BASE_ADDRESS_IO_MASK;
}
else
io_port = 0;
if (command & PCI_COMMAND_MEMORY) {
if ((base & PCI_BASE_ADDRESS_SPACE) != PCI_BASE_ADDRESS_SPACE_MEMORY) {
printk("ncr53c8xx: disabling memory mapping since base address 1\n"
" contains a non-memory mapping\n");
base = 0;
}
else
base &= PCI_BASE_ADDRESS_MEM_MASK;
}
else
base = 0;
if (!io_port && !base) {
printk("ncr53c8xx: not initializing, both I/O and memory mappings disabled\n");
return -1;
}
base_2 &= PCI_BASE_ADDRESS_MEM_MASK;
if (io_port && check_region (io_port, 128)) {
printk("ncr53c8xx: IO region 0x%x to 0x%x is in use\n",
(int) io_port, (int) (io_port + 127));
return -1;
}
if (!(command & PCI_COMMAND_MASTER)) {
printk("ncr53c8xx: not initializing, BUS MASTERING was disabled\n");
return -1;
}
/*
* Fix some features according to driver setup.
*/
if (!(driver_setup.special_features & 1))
chip->features &= ~FE_SPECIAL_SET;
else {
if (driver_setup.special_features & 2)
chip->features &= ~FE_WRIE;
}
if (driver_setup.ultra_scsi < 2 && (chip->features & FE_ULTRA2)) {
chip->features |= FE_ULTRA;
chip->features &= ~FE_ULTRA2;
}
if (driver_setup.ultra_scsi < 1)
chip->features &= ~FE_ULTRA;
if (!driver_setup.max_wide)
chip->features &= ~FE_WIDE;
#ifdef SCSI_NCR_PCI_FIX_UP_SUPPORT
/*
* Try to fix up PCI config according to wished features.
*/
#if defined(__i386) && !defined(MODULE)
if ((driver_setup.pci_fix_up & 1) &&
(chip->features & FE_CLSE) && cache_line_size == 0) {
#if LINUX_VERSION_CODE < LinuxVersionCode(2,1,75)
extern char x86;
switch(x86) {
#else
switch(boot_cpu_data.x86) {
#endif
case 4: cache_line_size = 4; break;
case 5: cache_line_size = 8; break;
}
if (cache_line_size)
(void) pcibios_write_config_byte(bus, device_fn,
PCI_CACHE_LINE_SIZE, cache_line_size);
if (initverbose)
printk("ncr53c8xx: setting PCI_CACHE_LINE_SIZE to %d (fix-up).\n", cache_line_size);
}
if ((driver_setup.pci_fix_up & 2) && cache_line_size &&
(chip->features & FE_WRIE) && !(command & PCI_COMMAND_INVALIDATE)) {
command |= PCI_COMMAND_INVALIDATE;
(void) pcibios_write_config_word(bus, device_fn,
PCI_COMMAND, command);
if (initverbose)
printk("ncr53c8xx: setting PCI_COMMAND_INVALIDATE bit (fix-up).\n");
}
#endif
/*
* Fix up for old chips that support READ LINE but not CACHE LINE SIZE.
* - If CACHE LINE SIZE is unknown, set burst max to 32 bytes = 8 dwords
* and donnot enable READ LINE.
* - Otherwise set it to the CACHE LINE SIZE (power of 2 assumed).
*/
if (!(chip->features & FE_CLSE)) {
int burst_max = chip->burst_max;
if (cache_line_size == 0) {
chip->features &= ~FE_ERL;
if (burst_max > 3)
burst_max = 3;
}
else {
while (cache_line_size < (1 << burst_max))
--burst_max;
}
chip->burst_max = burst_max;
}
/*
* Tune PCI LATENCY TIMER according to burst max length transfer.
* (latency timer >= burst length + 6, we add 10 to be quite sure)
* If current value is zero, the device has probably been configured
* for no bursting due to some broken hardware.
*/
if (latency_timer == 0 && chip->burst_max)
printk("ncr53c8xx: PCI_LATENCY_TIMER=0, bursting should'nt be allowed.\n");
if ((driver_setup.pci_fix_up & 4) && chip->burst_max) {
uchar lt = (1 << chip->burst_max) + 6 + 10;
if (latency_timer < lt) {
latency_timer = lt;
if (initverbose)
printk("ncr53c8xx: setting PCI_LATENCY_TIMER to %d bus clocks (fix-up).\n", latency_timer);
(void) pcibios_write_config_byte(bus, device_fn,
PCI_LATENCY_TIMER, latency_timer);
}
}
/*
* Fix up for recent chips that support CACHE LINE SIZE.
* If PCI config space is not OK, remove features that shall not be
* used by the chip. No need to trigger possible chip bugs.
*/
if ((chip->features & FE_CLSE) && cache_line_size == 0) {
chip->features &= ~FE_CACHE_SET;
printk("ncr53c8xx: PCI_CACHE_LINE_SIZE not set, features based on CACHE LINE SIZE not used.\n");
}
if ((chip->features & FE_WRIE) && !(command & PCI_COMMAND_INVALIDATE)) {
chip->features &= ~FE_WRIE;
printk("ncr53c8xx: PCI_COMMAND_INVALIDATE not set, WRITE AND INVALIDATE not used\n");
}
#endif /* SCSI_NCR_PCI_FIX_UP_SUPPORT */
/* initialise ncr_device structure with items required by ncr_attach */
device->slot.bus = bus;
device->slot.device_fn = device_fn;
device->slot.base = base;
device->slot.base_2 = base_2;
device->slot.io_port = io_port;
device->slot.irq = irq;
device->attach_done = 0;
#ifdef SCSI_NCR_NVRAM_SUPPORT
if (!nvram)
goto out;
/*
** Get access to chip IO registers
*/
#ifdef NCR_IOMAPPED
request_region(io_port, 128, "ncr53c8xx");
device->slot.port = io_port;
#else
device->slot.reg = (struct ncr_reg *) remap_pci_mem((ulong) base, 128);
if (!device->slot.reg)
goto out;
#endif
/*
** Try to read SYMBIOS nvram.
** Data can be used to order booting of boards.
**
** Data is saved in ncr_device structure if NVRAM found. This
** is then used to find drive boot order for ncr_attach().
**
** NVRAM data is passed to Scsi_Host_Template later during ncr_attach()
** for any device set up.
**
** Try to read TEKRAM nvram if Symbios nvram not found.
*/
if (!ncr_get_Symbios_nvram(&device->slot, &nvram->data.Symbios))
nvram->type = SCSI_NCR_SYMBIOS_NVRAM;
else if (!ncr_get_Tekram_nvram(&device->slot, &nvram->data.Tekram))
nvram->type = SCSI_NCR_TEKRAM_NVRAM;
else
nvram->type = 0;
out:
/*
** Release access to chip IO registers
*/
#ifdef NCR_IOMAPPED
release_region(device->slot.port, 128);
#else
unmap_pci_mem((vm_offset_t) device->slot.reg, (u_long) 128);
#endif
#endif /* SCSI_NCR_NVRAM_SUPPORT */
return 0;
}
#if LINUX_VERSION_CODE >= LinuxVersionCode(2,0,0)
/*
** Linux select queue depths function
*/
static void ncr53c8xx_select_queue_depths(struct Scsi_Host *host, struct scsi_device *devlist)
{
struct scsi_device *device;
for (device = devlist; device; device = device->next) {
if (device->host == host) {
#if SCSI_NCR_MAX_TAGS > 1
if (device->tagged_supported) {
device->queue_depth = SCSI_NCR_MAX_TAGS;
}
else {
device->queue_depth = 2;
}
#else
device->queue_depth = 1;
#endif
#ifdef DEBUG_NCR53C8XX
printk("ncr53c8xx_select_queue_depth: id=%d, lun=%d, queue_depth=%d\n",
device->id, device->lun, device->queue_depth);
#endif
}
}
}
#endif
/*
** Linux entry point of queuecommand() function
*/
int ncr53c8xx_queue_command (Scsi_Cmnd *cmd, void (* done)(Scsi_Cmnd *))
{
int sts;
#ifdef DEBUG_NCR53C8XX
printk("ncr53c8xx_queue_command\n");
#endif
if ((sts = ncr_queue_command(cmd, done)) != DID_OK) {
cmd->result = ScsiResult(sts, 0);
done(cmd);
#ifdef DEBUG_NCR53C8XX
printk("ncr53c8xx : command not queued - result=%d\n", sts);
#endif
return sts;
}
#ifdef DEBUG_NCR53C8XX
printk("ncr53c8xx : command successfully queued\n");
#endif
return sts;
}
/*
** Linux entry point of the interrupt handler.
** Fort linux versions > 1.3.70, we trust the kernel for
** passing the internal host descriptor as 'dev_id'.
** Otherwise, we scan the host list and call the interrupt
** routine for each host that uses this IRQ.
*/
#if LINUX_VERSION_CODE >= LinuxVersionCode(1,3,70)
static void ncr53c8xx_intr(int irq, void *dev_id, struct pt_regs * regs)
{
#ifdef DEBUG_NCR53C8XX
printk("ncr53c8xx : interrupt received\n");
#endif
if (DEBUG_FLAGS & DEBUG_TINY) printf ("[");
ncr_exception((ncb_p) dev_id);
if (DEBUG_FLAGS & DEBUG_TINY) printf ("]\n");
}
#else
static void ncr53c8xx_intr(int irq, struct pt_regs * regs)
{
struct Scsi_Host *host;
struct host_data *host_data;
for (host = first_host; host; host = host->next) {
if (host->hostt == the_template && host->irq == irq) {
host_data = (struct host_data *) host->hostdata;
if (DEBUG_FLAGS & DEBUG_TINY) printf ("[");
ncr_exception(host_data->ncb);
if (DEBUG_FLAGS & DEBUG_TINY) printf ("]\n");
}
}
}
#endif
/*
** Linux entry point of the timer handler
*/
static void ncr53c8xx_timeout(unsigned long np)
{
ncr_timeout((ncb_p) np);
}
/*
** Linux entry point of reset() function
*/
#if defined SCSI_RESET_SYNCHRONOUS && defined SCSI_RESET_ASYNCHRONOUS
int ncr53c8xx_reset(Scsi_Cmnd *cmd, unsigned int reset_flags)
{
int sts;
unsigned long flags;
printk("ncr53c8xx_reset: pid=%lu reset_flags=%x serial_number=%ld serial_number_at_timeout=%ld\n",
cmd->pid, reset_flags, cmd->serial_number, cmd->serial_number_at_timeout);
save_flags(flags); cli();
/*
* We have to just ignore reset requests in some situations.
*/
#if defined SCSI_RESET_NOT_RUNNING
if (cmd->serial_number != cmd->serial_number_at_timeout) {
sts = SCSI_RESET_NOT_RUNNING;
goto out;
}
#endif
/*
* If the mid-level driver told us reset is synchronous, it seems
* that we must call the done() callback for the involved command,
* even if this command was not queued to the low-level driver,
* before returning SCSI_RESET_SUCCESS.
*/
sts = ncr_reset_bus(cmd,
(reset_flags & (SCSI_RESET_SYNCHRONOUS | SCSI_RESET_ASYNCHRONOUS)) == SCSI_RESET_SYNCHRONOUS);
/*
* Since we always reset the controller, when we return success,
* we add this information to the return code.
*/
#if defined SCSI_RESET_HOST_RESET
if (sts == SCSI_RESET_SUCCESS)
sts |= SCSI_RESET_HOST_RESET;
#endif
out:
restore_flags(flags);
return sts;
}
#else
int ncr53c8xx_reset(Scsi_Cmnd *cmd)
{
printk("ncr53c8xx_reset: command pid %lu\n", cmd->pid);
return ncr_reset_bus(cmd, 1);
}
#endif
/*
** Linux entry point of abort() function
*/
#if defined SCSI_RESET_SYNCHRONOUS && defined SCSI_RESET_ASYNCHRONOUS
int ncr53c8xx_abort(Scsi_Cmnd *cmd)
{
int sts;
unsigned long flags;
printk("ncr53c8xx_abort: pid=%lu serial_number=%ld serial_number_at_timeout=%ld\n",
cmd->pid, cmd->serial_number, cmd->serial_number_at_timeout);
save_flags(flags); cli();
/*
* We have to just ignore abort requests in some situations.
*/
if (cmd->serial_number != cmd->serial_number_at_timeout) {
sts = SCSI_ABORT_NOT_RUNNING;
goto out;
}
sts = ncr_abort_command(cmd);
out:
restore_flags(flags);
return sts;
}
#else
int ncr53c8xx_abort(Scsi_Cmnd *cmd)
{
printk("ncr53c8xx_abort: command pid %lu\n", cmd->pid);
return ncr_abort_command(cmd);
}
#endif
#ifdef MODULE
int ncr53c8xx_release(struct Scsi_Host *host)
{
#ifdef DEBUG_NCR53C8XX
printk("ncr53c8xx : release\n");
#endif
ncr_detach(((struct host_data *) host->hostdata)->ncb);
return 1;
}
#endif
/*
** Scsi command waiting list management.
**
** It may happen that we cannot insert a scsi command into the start queue,
** in the following circumstances.
** Too few preallocated ccb(s),
** maxtags < cmd_per_lun of the Linux host control block,
** etc...
** Such scsi commands are inserted into a waiting list.
** When a scsi command complete, we try to requeue the commands of the
** waiting list.
*/
#define next_wcmd host_scribble
static void insert_into_waiting_list(ncb_p np, Scsi_Cmnd *cmd)
{
Scsi_Cmnd *wcmd;
#ifdef DEBUG_WAITING_LIST
printf("%s: cmd %lx inserted into waiting list\n", ncr_name(np), (u_long) cmd);
#endif
cmd->next_wcmd = 0;
if (!(wcmd = np->waiting_list)) np->waiting_list = cmd;
else {
while ((wcmd->next_wcmd) != 0)
wcmd = (Scsi_Cmnd *) wcmd->next_wcmd;
wcmd->next_wcmd = (char *) cmd;
}
}
static Scsi_Cmnd *retrieve_from_waiting_list(int to_remove, ncb_p np, Scsi_Cmnd *cmd)
{
Scsi_Cmnd *wcmd;
if (!(wcmd = np->waiting_list)) return 0;
while (wcmd->next_wcmd) {
if (cmd == (Scsi_Cmnd *) wcmd->next_wcmd) {
if (to_remove) {
wcmd->next_wcmd = cmd->next_wcmd;
cmd->next_wcmd = 0;
}
#ifdef DEBUG_WAITING_LIST
printf("%s: cmd %lx retrieved from waiting list\n", ncr_name(np), (u_long) cmd);
#endif
return cmd;
}
}
return 0;
}
static void process_waiting_list(ncb_p np, int sts)
{
Scsi_Cmnd *waiting_list, *wcmd;
waiting_list = np->waiting_list;
np->waiting_list = 0;
#ifdef DEBUG_WAITING_LIST
if (waiting_list) printf("%s: waiting_list=%lx processing sts=%d\n", ncr_name(np), (u_long) waiting_list, sts);
#endif
while ((wcmd = waiting_list) != 0) {
waiting_list = (Scsi_Cmnd *) wcmd->next_wcmd;
wcmd->next_wcmd = 0;
if (sts == DID_OK) {
#ifdef DEBUG_WAITING_LIST
printf("%s: cmd %lx trying to requeue\n", ncr_name(np), (u_long) wcmd);
#endif
sts = ncr_queue_command(wcmd, wcmd->scsi_done);
}
if (sts != DID_OK) {
#ifdef DEBUG_WAITING_LIST
printf("%s: cmd %lx done forced sts=%d\n", ncr_name(np), (u_long) wcmd, sts);
#endif
wcmd->result = ScsiResult(sts, 0);
wcmd->scsi_done(wcmd);
}
}
}
#undef next_wcmd
/*
** Returns data transfer direction for common op-codes.
*/
static int guess_xfer_direction(int opcode)
{
int d;
switch(opcode) {
case 0x12: /* INQUIRY 12 */
case 0x4D: /* LOG SENSE 4D */
case 0x5A: /* MODE SENSE(10) 5A */
case 0x1A: /* MODE SENSE(6) 1A */
case 0x3C: /* READ BUFFER 3C */
case 0x1C: /* RECEIVE DIAGNOSTIC RESULTS 1C */
case 0x03: /* REQUEST SENSE 03 */
d = XferIn;
break;
case 0x39: /* COMPARE 39 */
case 0x3A: /* COPY AND VERIFY 3A */
case 0x18: /* COPY 18 */
case 0x4C: /* LOG SELECT 4C */
case 0x55: /* MODE SELECT(10) 55 */
case 0x3B: /* WRITE BUFFER 3B */
case 0x1D: /* SEND DIAGNOSTIC 1D */
case 0x40: /* CHANGE DEFINITION 40 */
case 0x15: /* MODE SELECT(6) 15 */
d = XferOut;
break;
case 0x00: /* TEST UNIT READY 00 */
d = XferNone;
break;
default:
d = XferBoth;
break;
}
return d;
}
#ifdef SCSI_NCR_PROC_INFO_SUPPORT
/*=========================================================================
** Proc file system stuff
**
** A read operation returns profile information.
** A write operation is a control command.
** The string is parsed in the driver code and the command is passed
** to the ncr_usercmd() function.
**=========================================================================
*/
#ifdef SCSI_NCR_USER_COMMAND_SUPPORT
#define is_digit(c) ((c) >= '0' && (c) <= '9')
#define digit_to_bin(c) ((c) - '0')
#define is_space(c) ((c) == ' ' || (c) == '\t')
static int skip_spaces(char *ptr, int len)
{
int cnt, c;
for (cnt = len; cnt > 0 && (c = *ptr++) && is_space(c); cnt--);
return (len - cnt);
}
static int get_int_arg(char *ptr, int len, u_long *pv)
{
int cnt, c;
u_long v;
for (v = 0, cnt = len; cnt > 0 && (c = *ptr++) && is_digit(c); cnt--) {
v = (v * 10) + digit_to_bin(c);
}
if (pv)
*pv = v;
return (len - cnt);
}
static int is_keyword(char *ptr, int len, char *verb)
{
int verb_len = strlen(verb);
if (len >= strlen(verb) && !memcmp(verb, ptr, verb_len))
return verb_len;
else
return 0;
}
#define SKIP_SPACES(min_spaces) \
if ((arg_len = skip_spaces(ptr, len)) < (min_spaces)) \
return -EINVAL; \
ptr += arg_len; len -= arg_len;
#define GET_INT_ARG(v) \
if (!(arg_len = get_int_arg(ptr, len, &(v)))) \
return -EINVAL; \
ptr += arg_len; len -= arg_len;
/*
** Parse a control command
*/
static int ncr_user_command(ncb_p np, char *buffer, int length)
{
char *ptr = buffer;
int len = length;
struct usrcmd *uc = &np->user;
int arg_len;
u_long target;
bzero(uc, sizeof(*uc));
if (len > 0 && ptr[len-1] == '\n')
--len;
if ((arg_len = is_keyword(ptr, len, "setsync")) != 0)
uc->cmd = UC_SETSYNC;
else if ((arg_len = is_keyword(ptr, len, "settags")) != 0)
uc->cmd = UC_SETTAGS;
else if ((arg_len = is_keyword(ptr, len, "setorder")) != 0)
uc->cmd = UC_SETORDER;
else if ((arg_len = is_keyword(ptr, len, "setwide")) != 0)
uc->cmd = UC_SETWIDE;
else if ((arg_len = is_keyword(ptr, len, "setdebug")) != 0)
uc->cmd = UC_SETDEBUG;
else if ((arg_len = is_keyword(ptr, len, "setflag")) != 0)
uc->cmd = UC_SETFLAG;
else if ((arg_len = is_keyword(ptr, len, "clearprof")) != 0)
uc->cmd = UC_CLEARPROF;
#ifdef UC_DEBUG_ERROR_RECOVERY
else if ((arg_len = is_keyword(ptr, len, "debug_error_recovery")) != 0)
uc->cmd = UC_DEBUG_ERROR_RECOVERY;
#endif
else
arg_len = 0;
#ifdef DEBUG_PROC_INFO
printf("ncr_user_command: arg_len=%d, cmd=%ld\n", arg_len, uc->cmd);
#endif
if (!arg_len)
return -EINVAL;
ptr += arg_len; len -= arg_len;
switch(uc->cmd) {
case UC_SETSYNC:
case UC_SETTAGS:
case UC_SETWIDE:
case UC_SETFLAG:
SKIP_SPACES(1);
if ((arg_len = is_keyword(ptr, len, "all")) != 0) {
ptr += arg_len; len -= arg_len;
uc->target = ~0;
} else {
GET_INT_ARG(target);
uc->target = (1<<target);
#ifdef DEBUG_PROC_INFO
printf("ncr_user_command: target=%ld\n", target);
#endif
}
break;
}
switch(uc->cmd) {
case UC_SETSYNC:
case UC_SETTAGS:
case UC_SETWIDE:
SKIP_SPACES(1);
GET_INT_ARG(uc->data);
#ifdef DEBUG_PROC_INFO
printf("ncr_user_command: data=%ld\n", uc->data);
#endif
break;
case UC_SETORDER:
SKIP_SPACES(1);
if ((arg_len = is_keyword(ptr, len, "simple")))
uc->data = M_SIMPLE_TAG;
else if ((arg_len = is_keyword(ptr, len, "ordered")))
uc->data = M_ORDERED_TAG;
else if ((arg_len = is_keyword(ptr, len, "default")))
uc->data = 0;
else
return -EINVAL;
break;
case UC_SETDEBUG:
while (len > 0) {
SKIP_SPACES(1);
if ((arg_len = is_keyword(ptr, len, "alloc")))
uc->data |= DEBUG_ALLOC;
else if ((arg_len = is_keyword(ptr, len, "phase")))
uc->data |= DEBUG_PHASE;
else if ((arg_len = is_keyword(ptr, len, "poll")))
uc->data |= DEBUG_POLL;
else if ((arg_len = is_keyword(ptr, len, "queue")))
uc->data |= DEBUG_QUEUE;
else if ((arg_len = is_keyword(ptr, len, "result")))
uc->data |= DEBUG_RESULT;
else if ((arg_len = is_keyword(ptr, len, "scatter")))
uc->data |= DEBUG_SCATTER;
else if ((arg_len = is_keyword(ptr, len, "script")))
uc->data |= DEBUG_SCRIPT;
else if ((arg_len = is_keyword(ptr, len, "tiny")))
uc->data |= DEBUG_TINY;
else if ((arg_len = is_keyword(ptr, len, "timing")))
uc->data |= DEBUG_TIMING;
else if ((arg_len = is_keyword(ptr, len, "nego")))
uc->data |= DEBUG_NEGO;
else if ((arg_len = is_keyword(ptr, len, "tags")))
uc->data |= DEBUG_TAGS;
else if ((arg_len = is_keyword(ptr, len, "freeze")))
uc->data |= DEBUG_FREEZE;
else if ((arg_len = is_keyword(ptr, len, "restart")))
uc->data |= DEBUG_RESTART;
else
return -EINVAL;
ptr += arg_len; len -= arg_len;
}
#ifdef DEBUG_PROC_INFO
printf("ncr_user_command: data=%ld\n", uc->data);
#endif
break;
case UC_SETFLAG:
while (len > 0) {
SKIP_SPACES(1);
if ((arg_len = is_keyword(ptr, len, "trace")))
uc->data |= UF_TRACE;
else if ((arg_len = is_keyword(ptr, len, "no_disc")))
uc->data |= UF_NODISC;
else
return -EINVAL;
ptr += arg_len; len -= arg_len;
}
break;
#ifdef UC_DEBUG_ERROR_RECOVERY
case UC_DEBUG_ERROR_RECOVERY:
SKIP_SPACES(1);
if ((arg_len = is_keyword(ptr, len, "sge")))
uc->data = 1;
else if ((arg_len = is_keyword(ptr, len, "abort")))
uc->data = 2;
else if ((arg_len = is_keyword(ptr, len, "reset")))
uc->data = 3;
else if ((arg_len = is_keyword(ptr, len, "parity")))
uc->data = 4;
else if ((arg_len = is_keyword(ptr, len, "none")))
uc->data = 0;
else
return -EINVAL;
ptr += arg_len; len -= arg_len;
break;
#endif
default:
break;
}
if (len)
return -EINVAL;
else {
long flags;
save_flags(flags); cli();
ncr_usercmd (np);
restore_flags(flags);
}
return length;
}
#endif /* SCSI_NCR_USER_COMMAND_SUPPORT */
#ifdef SCSI_NCR_USER_INFO_SUPPORT
struct info_str
{
char *buffer;
int length;
int offset;
int pos;
};
static void copy_mem_info(struct info_str *info, char *data, int len)
{
if (info->pos + len > info->length)
len = info->length - info->pos;
if (info->pos + len < info->offset) {
info->pos += len;
return;
}
if (info->pos < info->offset) {
data += (info->offset - info->pos);
len -= (info->offset - info->pos);
}
if (len > 0) {
memcpy(info->buffer + info->pos, data, len);
info->pos += len;
}
}
static int copy_info(struct info_str *info, char *fmt, ...)
{
va_list args;
char buf[81];
int len;
va_start(args, fmt);
len = vsprintf(buf, fmt, args);
va_end(args);
copy_mem_info(info, buf, len);
return len;
}
/*
** Copy formatted profile information into the input buffer.
*/
#define to_ms(t) ((t) * 1000 / HZ)
static int ncr_host_info(ncb_p np, char *ptr, off_t offset, int len)
{
struct info_str info;
info.buffer = ptr;
info.length = len;
info.offset = offset;
info.pos = 0;
copy_info(&info, "General information:\n");
copy_info(&info, " Chip NCR53C%s, ", np->chip_name);
copy_info(&info, "device id 0x%x, ", np->device_id);
copy_info(&info, "revision id 0x%x\n", np->revision_id);
copy_info(&info, " IO port address 0x%lx, ", (u_long) np->port);
copy_info(&info, "IRQ number %d\n", (int) np->irq);
#ifndef NCR_IOMAPPED
if (np->reg)
copy_info(&info, " Using memory mapped IO at virtual address 0x%lx\n",
(u_long) np->reg);
#endif
copy_info(&info, " Synchronous period factor %d, ", (int) np->minsync);
copy_info(&info, "max commands per lun %d\n", SCSI_NCR_MAX_TAGS);
if (driver_setup.debug || driver_setup.verbose > 1) {
copy_info(&info, " Debug flags 0x%x, ", driver_setup.debug);
copy_info(&info, "verbosity level %d\n", driver_setup.verbose);
}
#ifdef SCSI_NCR_PROFILE_SUPPORT
copy_info(&info, "Profiling information:\n");
copy_info(&info, " %-12s = %lu\n", "num_trans",np->profile.num_trans);
copy_info(&info, " %-12s = %lu\n", "num_kbytes",np->profile.num_kbytes);
copy_info(&info, " %-12s = %lu\n", "num_disc", np->profile.num_disc);
copy_info(&info, " %-12s = %lu\n", "num_break",np->profile.num_break);
copy_info(&info, " %-12s = %lu\n", "num_int", np->profile.num_int);
copy_info(&info, " %-12s = %lu\n", "num_fly", np->profile.num_fly);
copy_info(&info, " %-12s = %lu\n", "ms_setup", to_ms(np->profile.ms_setup));
copy_info(&info, " %-12s = %lu\n", "ms_data", to_ms(np->profile.ms_data));
copy_info(&info, " %-12s = %lu\n", "ms_disc", to_ms(np->profile.ms_disc));
copy_info(&info, " %-12s = %lu\n", "ms_post", to_ms(np->profile.ms_post));
#endif
return info.pos > info.offset? info.pos - info.offset : 0;
}
#endif /* SCSI_NCR_USER_INFO_SUPPORT */
/*
** Entry point of the scsi proc fs of the driver.
** - func = 0 means read (returns profile data)
** - func = 1 means write (parse user control command)
*/
int ncr53c8xx_proc_info(char *buffer, char **start, off_t offset,
int length, int hostno, int func)
{
struct Scsi_Host *host;
struct host_data *host_data;
ncb_p ncb = 0;
int retv;
#ifdef DEBUG_PROC_INFO
printf("ncr53c8xx_proc_info: hostno=%d, func=%d\n", hostno, func);
#endif
for (host = first_host; host; host = host->next) {
if (host->hostt == the_template && host->host_no == hostno) {
host_data = (struct host_data *) host->hostdata;
ncb = host_data->ncb;
break;
}
}
if (!ncb)
return -EINVAL;
if (func) {
#ifdef SCSI_NCR_USER_COMMAND_SUPPORT
retv = ncr_user_command(ncb, buffer, length);
#else
retv = -EINVAL;
#endif
}
else {
if (start)
*start = buffer;
#ifdef SCSI_NCR_USER_INFO_SUPPORT
retv = ncr_host_info(ncb, buffer, offset, length);
#else
retv = -EINVAL;
#endif
}
return retv;
}
/*=========================================================================
** End of proc file system stuff
**=========================================================================
*/
#endif
#ifdef SCSI_NCR_NVRAM_SUPPORT
/* ---------------------------------------------------------------------
**
** Try reading Symbios format nvram
**
** ---------------------------------------------------------------------
**
** GPOI0 - data in/data out
** GPIO1 - clock
**
** return 0 if NVRAM data OK, 1 if NVRAM data not OK
** ---------------------------------------------------------------------
*/
#define SET_BIT 0
#define CLR_BIT 1
#define SET_CLK 2
#define CLR_CLK 3
static u_short nvram_read_data(ncr_slot *np, u_char *data, int len, u_char *gpreg, u_char *gpcntl);
static void nvram_start(ncr_slot *np, u_char *gpreg);
static void nvram_write_byte(ncr_slot *np, u_char *ack_data, u_char write_data, u_char *gpreg, u_char *gpcntl);
static void nvram_read_byte(ncr_slot *np, u_char *read_data, u_char ack_data, u_char *gpreg, u_char *gpcntl);
static void nvram_readAck(ncr_slot *np, u_char *read_bit, u_char *gpreg, u_char *gpcntl);
static void nvram_writeAck(ncr_slot *np, u_char write_bit, u_char *gpreg, u_char *gpcntl);
static void nvram_doBit(ncr_slot *np, u_char *read_bit, u_char write_bit, u_char *gpreg);
static void nvram_stop(ncr_slot *np, u_char *gpreg);
static void nvram_setBit(ncr_slot *np, u_char write_bit, u_char *gpreg, int bit_mode);
__initfunc(
static int ncr_get_Symbios_nvram (ncr_slot *np, Symbios_nvram *nvram)
)
{
static u_char Symbios_trailer[6] = {0xfe, 0xfe, 0, 0, 0, 0};
u_char gpcntl, gpreg;
u_char old_gpcntl, old_gpreg;
u_short csum;
u_char ack_data;
int retv = 1;
/* save current state of GPCNTL and GPREG */
old_gpreg = INB (nc_gpreg);
old_gpcntl = INB (nc_gpcntl);
gpcntl = old_gpcntl & 0xfc;
/* set up GPREG & GPCNTL to set GPIO0 and GPIO1 in to known state */
OUTB (nc_gpreg, old_gpreg);
OUTB (nc_gpcntl, gpcntl);
/* this is to set NVRAM into a known state with GPIO0/1 both low */
gpreg = old_gpreg;
nvram_setBit(np, 0, &gpreg, CLR_CLK);
nvram_setBit(np, 0, &gpreg, CLR_BIT);
/* now set NVRAM inactive with GPIO0/1 both high */
nvram_stop(np, &gpreg);
/* activate NVRAM */
nvram_start(np, &gpreg);
/* write device code and random address MSB */
nvram_write_byte(np, &ack_data,
0xa0 | ((SYMBIOS_NVRAM_ADDRESS >> 7) & 0x0e), &gpreg, &gpcntl);
if (ack_data & 0x01)
goto out;
/* write random address LSB */
nvram_write_byte(np, &ack_data,
(SYMBIOS_NVRAM_ADDRESS & 0x7f) << 1, &gpreg, &gpcntl);
if (ack_data & 0x01)
goto out;
/* regenerate START state to set up for reading */
nvram_start(np, &gpreg);
/* rewrite device code and address MSB with read bit set (lsb = 0x01) */
nvram_write_byte(np, &ack_data,
0xa1 | ((SYMBIOS_NVRAM_ADDRESS >> 7) & 0x0e), &gpreg, &gpcntl);
if (ack_data & 0x01)
goto out;
/* now set up GPIO0 for inputting data */
gpcntl |= 0x01;
OUTB (nc_gpcntl, gpcntl);
/* input all active data - only part of total NVRAM */
csum = nvram_read_data(np,
(u_char *) nvram, sizeof(*nvram), &gpreg, &gpcntl);
/* finally put NVRAM back in inactive mode */
gpcntl &= 0xfe;
OUTB (nc_gpcntl, gpcntl);
nvram_stop(np, &gpreg);
#ifdef SCSI_NCR_DEBUG_NVRAM
printf("ncr53c8xx: NvRAM marker=%x trailer=%x %x %x %x %x %x byte_count=%d/%d checksum=%x/%x\n",
nvram->start_marker,
nvram->trailer[0], nvram->trailer[1], nvram->trailer[2],
nvram->trailer[3], nvram->trailer[4], nvram->trailer[5],
nvram->byte_count, sizeof(*nvram) - 12,
nvram->checksum, csum);
#endif
/* check valid NVRAM signature, verify byte count and checksum */
if (nvram->start_marker == 0 &&
!memcmp(nvram->trailer, Symbios_trailer, 6) &&
nvram->byte_count == sizeof(*nvram) - 12 &&
csum == nvram->checksum)
retv = 0;
out:
/* return GPIO0/1 to original states after having accessed NVRAM */
OUTB (nc_gpcntl, old_gpcntl);
OUTB (nc_gpreg, old_gpreg);
return retv;
}
/*
* Read Symbios NvRAM data and compute checksum.
*/
__initfunc(
static u_short nvram_read_data(ncr_slot *np, u_char *data, int len, u_char *gpreg, u_char *gpcntl)
)
{
int x;
u_short csum;
for (x = 0; x < len; x++)
nvram_read_byte(np, &data[x], (x == (len - 1)), gpreg, gpcntl);
for (x = 6, csum = 0; x < len - 6; x++)
csum += data[x];
return csum;
}
/*
* Send START condition to NVRAM to wake it up.
*/
__initfunc(
static void nvram_start(ncr_slot *np, u_char *gpreg)
)
{
nvram_setBit(np, 1, gpreg, SET_BIT);
nvram_setBit(np, 0, gpreg, SET_CLK);
nvram_setBit(np, 0, gpreg, CLR_BIT);
nvram_setBit(np, 0, gpreg, CLR_CLK);
}
/*
* WRITE a byte to the NVRAM and then get an ACK to see it was accepted OK,
* GPIO0 must already be set as an output
*/
__initfunc(
static void nvram_write_byte(ncr_slot *np, u_char *ack_data, u_char write_data, u_char *gpreg, u_char *gpcntl)
)
{
int x;
for (x = 0; x < 8; x++)
nvram_doBit(np, 0, (write_data >> (7 - x)) & 0x01, gpreg);
nvram_readAck(np, ack_data, gpreg, gpcntl);
}
/*
* READ a byte from the NVRAM and then send an ACK to say we have got it,
* GPIO0 must already be set as an input
*/
__initfunc(
static void nvram_read_byte(ncr_slot *np, u_char *read_data, u_char ack_data, u_char *gpreg, u_char *gpcntl)
)
{
int x;
u_char read_bit;
*read_data = 0;
for (x = 0; x < 8; x++) {
nvram_doBit(np, &read_bit, 1, gpreg);
*read_data |= ((read_bit & 0x01) << (7 - x));
}
nvram_writeAck(np, ack_data, gpreg, gpcntl);
}
/*
* Output an ACK to the NVRAM after reading,
* change GPIO0 to output and when done back to an input
*/
__initfunc(
static void nvram_writeAck(ncr_slot *np, u_char write_bit, u_char *gpreg, u_char *gpcntl)
)
{
OUTB (nc_gpcntl, *gpcntl & 0xfe);
nvram_doBit(np, 0, write_bit, gpreg);
OUTB (nc_gpcntl, *gpcntl);
}
/*
* Input an ACK from NVRAM after writing,
* change GPIO0 to input and when done back to an output
*/
__initfunc(
static void nvram_readAck(ncr_slot *np, u_char *read_bit, u_char *gpreg, u_char *gpcntl)
)
{
OUTB (nc_gpcntl, *gpcntl | 0x01);
nvram_doBit(np, read_bit, 1, gpreg);
OUTB (nc_gpcntl, *gpcntl);
}
/*
* Read or write a bit to the NVRAM,
* read if GPIO0 input else write if GPIO0 output
*/
__initfunc(
static void nvram_doBit(ncr_slot *np, u_char *read_bit, u_char write_bit, u_char *gpreg)
)
{
nvram_setBit(np, write_bit, gpreg, SET_BIT);
nvram_setBit(np, 0, gpreg, SET_CLK);
if (read_bit)
*read_bit = INB (nc_gpreg);
nvram_setBit(np, 0, gpreg, CLR_CLK);
nvram_setBit(np, 0, gpreg, CLR_BIT);
}
/*
* Send STOP condition to NVRAM - puts NVRAM to sleep... ZZzzzz!!
*/
__initfunc(
static void nvram_stop(ncr_slot *np, u_char *gpreg)
)
{
nvram_setBit(np, 0, gpreg, SET_CLK);
nvram_setBit(np, 1, gpreg, SET_BIT);
}
/*
* Set/clear data/clock bit in GPIO0
*/
__initfunc(
static void nvram_setBit(ncr_slot *np, u_char write_bit, u_char *gpreg, int bit_mode)
)
{
DELAY(5);
switch (bit_mode){
case SET_BIT:
*gpreg |= write_bit;
break;
case CLR_BIT:
*gpreg &= 0xfe;
break;
case SET_CLK:
*gpreg |= 0x02;
break;
case CLR_CLK:
*gpreg &= 0xfd;
break;
}
OUTB (nc_gpreg, *gpreg);
DELAY(5);
}
#undef SET_BIT 0
#undef CLR_BIT 1
#undef SET_CLK 2
#undef CLR_CLK 3
/* ---------------------------------------------------------------------
**
** Try reading Tekram format nvram
**
** ---------------------------------------------------------------------
**
** GPOI0 - data in
** GPIO1 - data out
** GPIO2 - clock
** GPIO4 - chip select
**
** return 0 if NVRAM data OK, 1 if NVRAM data not OK
** ---------------------------------------------------------------------
*/
static u_short Tnvram_read_data(ncr_slot *np, u_short *data, int len, u_char *gpreg);
static void Tnvram_Send_Command(ncr_slot *np, u_short write_data, u_char *read_bit, u_char *gpreg);
static void Tnvram_Read_Word(ncr_slot *np, u_short *nvram_data, u_char *gpreg);
static void Tnvram_Read_Bit(ncr_slot *np, u_char *read_bit, u_char *gpreg);
static void Tnvram_Write_Bit(ncr_slot *np, u_char write_bit, u_char *gpreg);
static void Tnvram_Stop(ncr_slot *np, u_char *gpreg);
static void Tnvram_Clk(ncr_slot *np, u_char *gpreg);
__initfunc(
static int ncr_get_Tekram_nvram (ncr_slot *np, Tekram_nvram *nvram)
)
{
u_char gpcntl, gpreg;
u_char old_gpcntl, old_gpreg;
u_short csum;
/* save current state of GPCNTL and GPREG */
old_gpreg = INB (nc_gpreg);
old_gpcntl = INB (nc_gpcntl);
/* set up GPREG & GPCNTL to set GPIO0/1/2/4 in to known state, 0 in,
1/2/4 out */
gpreg = old_gpreg & 0xe9;
OUTB (nc_gpreg, gpreg);
gpcntl = (old_gpcntl & 0xe9) | 0x09;
OUTB (nc_gpcntl, gpcntl);
/* input all of NVRAM, 64 words */
csum = Tnvram_read_data(np, (u_short *) nvram,
sizeof(*nvram) / sizeof(short), &gpreg);
/* return GPIO0/1/2/4 to original states after having accessed NVRAM */
OUTB (nc_gpcntl, old_gpcntl);
OUTB (nc_gpreg, old_gpreg);
/* check data valid */
if (csum != 0x1234)
return 1;
return 0;
}
/*
* Read Tekram NvRAM data and compute checksum.
*/
__initfunc(
static u_short Tnvram_read_data(ncr_slot *np, u_short *data, int len, u_char *gpreg)
)
{
u_char read_bit;
u_short csum;
int x;
for (x = 0, csum = 0; x < len; x++) {
/* output read command and address */
Tnvram_Send_Command(np, 0x180 | x, &read_bit, gpreg);
if (read_bit & 0x01)
return 0; /* Force bad checksum */
Tnvram_Read_Word(np, &data[x], gpreg);
csum += data[x];
Tnvram_Stop(np, gpreg);
}
return csum;
}
/*
* Send read command and address to NVRAM
*/
__initfunc(
static void Tnvram_Send_Command(ncr_slot *np, u_short write_data, u_char *read_bit, u_char *gpreg)
)
{
int x;
/* send 9 bits, start bit (1), command (2), address (6) */
for (x = 0; x < 9; x++)
Tnvram_Write_Bit(np, (u_char) (write_data >> (8 - x)), gpreg);
*read_bit = INB (nc_gpreg);
}
/*
* READ a byte from the NVRAM
*/
__initfunc(
static void Tnvram_Read_Word(ncr_slot *np, u_short *nvram_data, u_char *gpreg)
)
{
int x;
u_char read_bit;
*nvram_data = 0;
for (x = 0; x < 16; x++) {
Tnvram_Read_Bit(np, &read_bit, gpreg);
if (read_bit & 0x01)
*nvram_data |= (0x01 << (15 - x));
else
*nvram_data &= ~(0x01 << (15 - x));
}
}
/*
* Read bit from NVRAM
*/
__initfunc(
static void Tnvram_Read_Bit(ncr_slot *np, u_char *read_bit, u_char *gpreg)
)
{
DELAY(2);
Tnvram_Clk(np, gpreg);
*read_bit = INB (nc_gpreg);
}
/*
* Write bit to GPIO0
*/
__initfunc(
static void Tnvram_Write_Bit(ncr_slot *np, u_char write_bit, u_char *gpreg)
)
{
if (write_bit & 0x01)
*gpreg |= 0x02;
else
*gpreg &= 0xfd;
*gpreg |= 0x10;
OUTB (nc_gpreg, *gpreg);
DELAY(2);
Tnvram_Clk(np, gpreg);
}
/*
* Send STOP condition to NVRAM - puts NVRAM to sleep... ZZZzzz!!
*/
__initfunc(
static void Tnvram_Stop(ncr_slot *np, u_char *gpreg)
)
{
*gpreg &= 0xef;
OUTB (nc_gpreg, *gpreg);
DELAY(2);
Tnvram_Clk(np, gpreg);
}
/*
* Pulse clock bit in GPIO0
*/
__initfunc(
static void Tnvram_Clk(ncr_slot *np, u_char *gpreg)
)
{
OUTB (nc_gpreg, *gpreg | 0x04);
DELAY(2);
OUTB (nc_gpreg, *gpreg);
}
#endif /* SCSI_NCR_NVRAM_SUPPORT */
/*
** Module stuff
*/
#ifdef MODULE
Scsi_Host_Template driver_template = NCR53C8XX;
#include "scsi_module.c"
#endif