/****************************************************************************** ** 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 ** ** 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 ** Stefan Esser ** ** And has been ported to NetBSD by ** Charles M. Hannum ** **----------------------------------------------------------------------------- ** ** 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 : ** Support for NvRAM detection and reading. ** ** August 18 1997 by Cort : ** 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 #endif #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #if LINUX_VERSION_CODE >= LinuxVersionCode(1,3,0) #include #else #include "../block/blk.h" #endif #if LINUX_VERSION_CODE >= LinuxVersionCode(2,1,35) #include #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 /* ** 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 typedef u_long vm_offset_t; typedef int vm_size_t; #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 ** */ 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 ** */ 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 ** */ 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========= ** || 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=========== ** || 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========= ** || 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; itryloop + sizeof (scrh->tryloop)); p = scr->data_in; for (i=0; idata_in + sizeof (scr->data_in)); p = scrh->data_out; for (i=0; idata_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; icmd_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 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<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;itarget[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; llp[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; tuser.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; tuser.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; tuser.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; tuser.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; iregdump); 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; itarget[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; incr_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<= 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<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