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linux/drivers/scsi/wd7000.c
Jeff Garzik df0ae2497d [SCSI] allow sleeping in ->eh_host_reset_handler() 
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2005-06-17 12:05:18 -05:00

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/* $Id: $
* linux/drivers/scsi/wd7000.c
*
* Copyright (C) 1992 Thomas Wuensche
* closely related to the aha1542 driver from Tommy Thorn
* ( as close as different hardware allows on a lowlevel-driver :-) )
*
* Revised (and renamed) by John Boyd <boyd@cis.ohio-state.edu> to
* accommodate Eric Youngdale's modifications to scsi.c. Nov 1992.
*
* Additional changes to support scatter/gather. Dec. 1992. tw/jb
*
* No longer tries to reset SCSI bus at boot (it wasn't working anyway).
* Rewritten to support multiple host adapters.
* Miscellaneous cleanup.
* So far, still doesn't do reset or abort correctly, since I have no idea
* how to do them with this board (8^(. Jan 1994 jb
*
* This driver now supports both of the two standard configurations (per
* the 3.36 Owner's Manual, my latest reference) by the same method as
* before; namely, by looking for a BIOS signature. Thus, the location of
* the BIOS signature determines the board configuration. Until I have
* time to do something more flexible, users should stick to one of the
* following:
*
* Standard configuration for single-adapter systems:
* - BIOS at CE00h
* - I/O base address 350h
* - IRQ level 15
* - DMA channel 6
* Standard configuration for a second adapter in a system:
* - BIOS at C800h
* - I/O base address 330h
* - IRQ level 11
* - DMA channel 5
*
* Anyone who can recompile the kernel is welcome to add others as need
* arises, but unpredictable results may occur if there are conflicts.
* In any event, if there are multiple adapters in a system, they MUST
* use different I/O bases, IRQ levels, and DMA channels, since they will be
* indistinguishable (and in direct conflict) otherwise.
*
* As a point of information, the NO_OP command toggles the CMD_RDY bit
* of the status port, and this fact could be used as a test for the I/O
* base address (or more generally, board detection). There is an interrupt
* status port, so IRQ probing could also be done. I suppose the full
* DMA diagnostic could be used to detect the DMA channel being used. I
* haven't done any of this, though, because I think there's too much of
* a chance that such explorations could be destructive, if some other
* board's resources are used inadvertently. So, call me a wimp, but I
* don't want to try it. The only kind of exploration I trust is memory
* exploration, since it's more certain that reading memory won't be
* destructive.
*
* More to my liking would be a LILO boot command line specification, such
* as is used by the aha152x driver (and possibly others). I'll look into
* it, as I have time...
*
* I get mail occasionally from people who either are using or are
* considering using a WD7000 with Linux. There is a variety of
* nomenclature describing WD7000's. To the best of my knowledge, the
* following is a brief summary (from an old WD doc - I don't work for
* them or anything like that):
*
* WD7000-FASST2: This is a WD7000 board with the real-mode SST ROM BIOS
* installed. Last I heard, the BIOS was actually done by Columbia
* Data Products. The BIOS is only used by this driver (and thus
* by Linux) to identify the board; none of it can be executed under
* Linux.
*
* WD7000-ASC: This is the original adapter board, with or without BIOS.
* The board uses a WD33C93 or WD33C93A SBIC, which in turn is
* controlled by an onboard Z80 processor. The board interface
* visible to the host CPU is defined effectively by the Z80's
* firmware, and it is this firmware's revision level that is
* determined and reported by this driver. (The version of the
* on-board BIOS is of no interest whatsoever.) The host CPU has
* no access to the SBIC; hence the fact that it is a WD33C93 is
* also of no interest to this driver.
*
* WD7000-AX:
* WD7000-MX:
* WD7000-EX: These are newer versions of the WD7000-ASC. The -ASC is
* largely built from discrete components; these boards use more
* integration. The -AX is an ISA bus board (like the -ASC),
* the -MX is an MCA (i.e., PS/2) bus board), and the -EX is an
* EISA bus board.
*
* At the time of my documentation, the -?X boards were "future" products,
* and were not yet available. However, I vaguely recall that Thomas
* Wuensche had an -AX, so I believe at least it is supported by this
* driver. I have no personal knowledge of either -MX or -EX boards.
*
* P.S. Just recently, I've discovered (directly from WD and Future
* Domain) that all but the WD7000-EX have been out of production for
* two years now. FD has production rights to the 7000-EX, and are
* producing it under a new name, and with a new BIOS. If anyone has
* one of the FD boards, it would be nice to come up with a signature
* for it.
* J.B. Jan 1994.
*
*
* Revisions by Miroslav Zagorac <zaga@fly.cc.fer.hr>
*
* 08/24/1996.
*
* Enhancement for wd7000_detect function has been made, so you don't have
* to enter BIOS ROM address in initialisation data (see struct Config).
* We cannot detect IRQ, DMA and I/O base address for now, so we have to
* enter them as arguments while wd_7000 is detected. If someone has IRQ,
* DMA or I/O base address set to some other value, he can enter them in
* configuration without any problem. Also I wrote a function wd7000_setup,
* so now you can enter WD-7000 definition as kernel arguments,
* as in lilo.conf:
*
* append="wd7000=IRQ,DMA,IO"
*
* PS: If card BIOS ROM is disabled, function wd7000_detect now will recognize
* adapter, unlike the old one. Anyway, BIOS ROM from WD7000 adapter is
* useless for Linux. B^)
*
*
* 09/06/1996.
*
* Autodetecting of I/O base address from wd7000_detect function is removed,
* some little bugs removed, etc...
*
* Thanks to Roger Scott for driver debugging.
*
* 06/07/1997
*
* Added support for /proc file system (/proc/scsi/wd7000/[0...] files).
* Now, driver can handle hard disks with capacity >1GB.
*
* 01/15/1998
*
* Added support for BUS_ON and BUS_OFF parameters in config line.
* Miscellaneous cleanup.
*
* 03/01/1998
*
* WD7000 driver now work on kernels >= 2.1.x
*
*
* 12/31/2001 - Arnaldo Carvalho de Melo <acme@conectiva.com.br>
*
* use host->host_lock, not io_request_lock, cleanups
*
* 2002/10/04 - Alan Cox <alan@redhat.com>
*
* Use dev_id for interrupts, kill __FUNCTION__ pasting
* Add a lock for the scb pool, clean up all other cli/sti usage stuff
* Use the adapter lock for the other places we had the cli's
*
* 2002/10/06 - Alan Cox <alan@redhat.com>
*
* Switch to new style error handling
* Clean up delay to udelay, and yielding sleeps
* Make host reset actually reset the card
* Make everything static
*
* 2003/02/12 - Christoph Hellwig <hch@infradead.org>
*
* Cleaned up host template defintion
* Removed now obsolete wd7000.h
*/
#include <linux/delay.h>
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/string.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/ioport.h>
#include <linux/proc_fs.h>
#include <linux/blkdev.h>
#include <linux/init.h>
#include <linux/stat.h>
#include <asm/system.h>
#include <asm/dma.h>
#include <asm/io.h>
#include <scsi/scsi.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_host.h>
#include <scsi/scsicam.h>
#undef WD7000_DEBUG /* general debug */
#ifdef WD7000_DEBUG
#define dprintk printk
#else
#define dprintk(format,args...)
#endif
/*
* Mailbox structure sizes.
* I prefer to keep the number of ICMBs much larger than the number of
* OGMBs. OGMBs are used very quickly by the driver to start one or
* more commands, while ICMBs are used by the host adapter per command.
*/
#define OGMB_CNT 16
#define ICMB_CNT 32
/*
* Scb's are shared by all active adapters. So, if they all become busy,
* callers may be made to wait in alloc_scbs for them to free. That can
* be avoided by setting MAX_SCBS to NUM_CONFIG * WD7000_Q. If you'd
* rather conserve memory, use a smaller number (> 0, of course) - things
* will should still work OK.
*/
#define MAX_SCBS 32
/*
* In this version, sg_tablesize now defaults to WD7000_SG, and will
* be set to SG_NONE for older boards. This is the reverse of the
* previous default, and was changed so that the driver-level
* scsi_host_template would reflect the driver's support for scatter/
* gather.
*
* Also, it has been reported that boards at Revision 6 support scatter/
* gather, so the new definition of an "older" board has been changed
* accordingly.
*/
#define WD7000_Q 16
#define WD7000_SG 16
/*
* WD7000-specific mailbox structure
*
*/
typedef volatile struct mailbox {
unchar status;
unchar scbptr[3]; /* SCSI-style - MSB first (big endian) */
} Mailbox;
/*
* This structure should contain all per-adapter global data. I.e., any
* new global per-adapter data should put in here.
*/
typedef struct adapter {
struct Scsi_Host *sh; /* Pointer to Scsi_Host structure */
int iobase; /* This adapter's I/O base address */
int irq; /* This adapter's IRQ level */
int dma; /* This adapter's DMA channel */
int int_counter; /* This adapter's interrupt counter */
int bus_on; /* This adapter's BUS_ON time */
int bus_off; /* This adapter's BUS_OFF time */
struct { /* This adapter's mailboxes */
Mailbox ogmb[OGMB_CNT]; /* Outgoing mailboxes */
Mailbox icmb[ICMB_CNT]; /* Incoming mailboxes */
} mb;
int next_ogmb; /* to reduce contention at mailboxes */
unchar control; /* shadows CONTROL port value */
unchar rev1, rev2; /* filled in by wd7000_revision */
} Adapter;
/*
* (linear) base address for ROM BIOS
*/
static const long wd7000_biosaddr[] = {
0xc0000, 0xc2000, 0xc4000, 0xc6000, 0xc8000, 0xca000, 0xcc000, 0xce000,
0xd0000, 0xd2000, 0xd4000, 0xd6000, 0xd8000, 0xda000, 0xdc000, 0xde000
};
#define NUM_ADDRS (sizeof(wd7000_biosaddr)/sizeof(long))
static const unsigned short wd7000_iobase[] = {
0x0300, 0x0308, 0x0310, 0x0318, 0x0320, 0x0328, 0x0330, 0x0338,
0x0340, 0x0348, 0x0350, 0x0358, 0x0360, 0x0368, 0x0370, 0x0378,
0x0380, 0x0388, 0x0390, 0x0398, 0x03a0, 0x03a8, 0x03b0, 0x03b8,
0x03c0, 0x03c8, 0x03d0, 0x03d8, 0x03e0, 0x03e8, 0x03f0, 0x03f8
};
#define NUM_IOPORTS (sizeof(wd7000_iobase)/sizeof(unsigned short))
static const short wd7000_irq[] = { 3, 4, 5, 7, 9, 10, 11, 12, 14, 15 };
#define NUM_IRQS (sizeof(wd7000_irq)/sizeof(short))
static const short wd7000_dma[] = { 5, 6, 7 };
#define NUM_DMAS (sizeof(wd7000_dma)/sizeof(short))
/*
* The following is set up by wd7000_detect, and used thereafter for
* proc and other global ookups
*/
#define UNITS 8
static struct Scsi_Host *wd7000_host[UNITS];
#define BUS_ON 64 /* x 125ns = 8000ns (BIOS default) */
#define BUS_OFF 15 /* x 125ns = 1875ns (BIOS default) */
/*
* Standard Adapter Configurations - used by wd7000_detect
*/
typedef struct {
short irq; /* IRQ level */
short dma; /* DMA channel */
unsigned iobase; /* I/O base address */
short bus_on; /* Time that WD7000 spends on the AT-bus when */
/* transferring data. BIOS default is 8000ns. */
short bus_off; /* Time that WD7000 spends OFF THE BUS after */
/* while it is transferring data. */
/* BIOS default is 1875ns */
} Config;
/*
* Add here your configuration...
*/
static Config configs[] = {
{15, 6, 0x350, BUS_ON, BUS_OFF}, /* defaults for single adapter */
{11, 5, 0x320, BUS_ON, BUS_OFF}, /* defaults for second adapter */
{7, 6, 0x350, BUS_ON, BUS_OFF}, /* My configuration (Zaga) */
{-1, -1, 0x0, BUS_ON, BUS_OFF} /* Empty slot */
};
#define NUM_CONFIGS (sizeof(configs)/sizeof(Config))
/*
* The following list defines strings to look for in the BIOS that identify
* it as the WD7000-FASST2 SST BIOS. I suspect that something should be
* added for the Future Domain version.
*/
typedef struct signature {
const char *sig; /* String to look for */
unsigned long ofs; /* offset from BIOS base address */
unsigned len; /* length of string */
} Signature;
static const Signature signatures[] = {
{"SSTBIOS", 0x0000d, 7} /* "SSTBIOS" @ offset 0x0000d */
};
#define NUM_SIGNATURES (sizeof(signatures)/sizeof(Signature))
/*
* I/O Port Offsets and Bit Definitions
* 4 addresses are used. Those not defined here are reserved.
*/
#define ASC_STAT 0 /* Status, Read */
#define ASC_COMMAND 0 /* Command, Write */
#define ASC_INTR_STAT 1 /* Interrupt Status, Read */
#define ASC_INTR_ACK 1 /* Acknowledge, Write */
#define ASC_CONTROL 2 /* Control, Write */
/*
* ASC Status Port
*/
#define INT_IM 0x80 /* Interrupt Image Flag */
#define CMD_RDY 0x40 /* Command Port Ready */
#define CMD_REJ 0x20 /* Command Port Byte Rejected */
#define ASC_INIT 0x10 /* ASC Initialized Flag */
#define ASC_STATMASK 0xf0 /* The lower 4 Bytes are reserved */
/*
* COMMAND opcodes
*
* Unfortunately, I have no idea how to properly use some of these commands,
* as the OEM manual does not make it clear. I have not been able to use
* enable/disable unsolicited interrupts or the reset commands with any
* discernible effect whatsoever. I think they may be related to certain
* ICB commands, but again, the OEM manual doesn't make that clear.
*/
#define NO_OP 0 /* NO-OP toggles CMD_RDY bit in ASC_STAT */
#define INITIALIZATION 1 /* initialization (10 bytes) */
#define DISABLE_UNS_INTR 2 /* disable unsolicited interrupts */
#define ENABLE_UNS_INTR 3 /* enable unsolicited interrupts */
#define INTR_ON_FREE_OGMB 4 /* interrupt on free OGMB */
#define SOFT_RESET 5 /* SCSI bus soft reset */
#define HARD_RESET_ACK 6 /* SCSI bus hard reset acknowledge */
#define START_OGMB 0x80 /* start command in OGMB (n) */
#define SCAN_OGMBS 0xc0 /* start multiple commands, signature (n) */
/* where (n) = lower 6 bits */
/*
* For INITIALIZATION:
*/
typedef struct initCmd {
unchar op; /* command opcode (= 1) */
unchar ID; /* Adapter's SCSI ID */
unchar bus_on; /* Bus on time, x 125ns (see below) */
unchar bus_off; /* Bus off time, "" "" */
unchar rsvd; /* Reserved */
unchar mailboxes[3]; /* Address of Mailboxes, MSB first */
unchar ogmbs; /* Number of outgoing MBs, max 64, 0,1 = 1 */
unchar icmbs; /* Number of incoming MBs, "" "" */
} InitCmd;
/*
* Interrupt Status Port - also returns diagnostic codes at ASC reset
*
* if msb is zero, the lower bits are diagnostic status
* Diagnostics:
* 01 No diagnostic error occurred
* 02 RAM failure
* 03 FIFO R/W failed
* 04 SBIC register read/write failed
* 05 Initialization D-FF failed
* 06 Host IRQ D-FF failed
* 07 ROM checksum error
* Interrupt status (bitwise):
* 10NNNNNN outgoing mailbox NNNNNN is free
* 11NNNNNN incoming mailbox NNNNNN needs service
*/
#define MB_INTR 0xC0 /* Mailbox Service possible/required */
#define IMB_INTR 0x40 /* 1 Incoming / 0 Outgoing */
#define MB_MASK 0x3f /* mask for mailbox number */
/*
* CONTROL port bits
*/
#define INT_EN 0x08 /* Interrupt Enable */
#define DMA_EN 0x04 /* DMA Enable */
#define SCSI_RES 0x02 /* SCSI Reset */
#define ASC_RES 0x01 /* ASC Reset */
/*
* Driver data structures:
* - mb and scbs are required for interfacing with the host adapter.
* An SCB has extra fields not visible to the adapter; mb's
* _cannot_ do this, since the adapter assumes they are contiguous in
* memory, 4 bytes each, with ICMBs following OGMBs, and uses this fact
* to access them.
* - An icb is for host-only (non-SCSI) commands. ICBs are 16 bytes each;
* the additional bytes are used only by the driver.
* - For now, a pool of SCBs are kept in global storage by this driver,
* and are allocated and freed as needed.
*
* The 7000-FASST2 marks OGMBs empty as soon as it has _started_ a command,
* not when it has finished. Since the SCB must be around for completion,
* problems arise when SCBs correspond to OGMBs, which may be reallocated
* earlier (or delayed unnecessarily until a command completes).
* Mailboxes are used as transient data structures, simply for
* carrying SCB addresses to/from the 7000-FASST2.
*
* Note also since SCBs are not "permanently" associated with mailboxes,
* there is no need to keep a global list of scsi_cmnd pointers indexed
* by OGMB. Again, SCBs reference their scsi_cmnds directly, so mailbox
* indices need not be involved.
*/
/*
* WD7000-specific scatter/gather element structure
*/
typedef struct sgb {
unchar len[3];
unchar ptr[3]; /* Also SCSI-style - MSB first */
} Sgb;
typedef struct scb { /* Command Control Block 5.4.1 */
unchar op; /* Command Control Block Operation Code */
unchar idlun; /* op=0,2:Target Id, op=1:Initiator Id */
/* Outbound data transfer, length is checked */
/* Inbound data transfer, length is checked */
/* Logical Unit Number */
unchar cdb[12]; /* SCSI Command Block */
volatile unchar status; /* SCSI Return Status */
volatile unchar vue; /* Vendor Unique Error Code */
unchar maxlen[3]; /* Maximum Data Transfer Length */
unchar dataptr[3]; /* SCSI Data Block Pointer */
unchar linkptr[3]; /* Next Command Link Pointer */
unchar direc; /* Transfer Direction */
unchar reserved2[6]; /* SCSI Command Descriptor Block */
/* end of hardware SCB */
struct scsi_cmnd *SCpnt;/* scsi_cmnd using this SCB */
Sgb sgb[WD7000_SG]; /* Scatter/gather list for this SCB */
Adapter *host; /* host adapter */
struct scb *next; /* for lists of scbs */
} Scb;
/*
* This driver is written to allow host-only commands to be executed.
* These use a 16-byte block called an ICB. The format is extended by the
* driver to 18 bytes, to support the status returned in the ICMB and
* an execution phase code.
*
* There are other formats besides these; these are the ones I've tried
* to use. Formats for some of the defined ICB opcodes are not defined
* (notably, get/set unsolicited interrupt status) in my copy of the OEM
* manual, and others are ambiguous/hard to follow.
*/
#define ICB_OP_MASK 0x80 /* distinguishes scbs from icbs */
#define ICB_OP_OPEN_RBUF 0x80 /* open receive buffer */
#define ICB_OP_RECV_CMD 0x81 /* receive command from initiator */
#define ICB_OP_RECV_DATA 0x82 /* receive data from initiator */
#define ICB_OP_RECV_SDATA 0x83 /* receive data with status from init. */
#define ICB_OP_SEND_DATA 0x84 /* send data with status to initiator */
#define ICB_OP_SEND_STAT 0x86 /* send command status to initiator */
/* 0x87 is reserved */
#define ICB_OP_READ_INIT 0x88 /* read initialization bytes */
#define ICB_OP_READ_ID 0x89 /* read adapter's SCSI ID */
#define ICB_OP_SET_UMASK 0x8A /* set unsolicited interrupt mask */
#define ICB_OP_GET_UMASK 0x8B /* read unsolicited interrupt mask */
#define ICB_OP_GET_REVISION 0x8C /* read firmware revision level */
#define ICB_OP_DIAGNOSTICS 0x8D /* execute diagnostics */
#define ICB_OP_SET_EPARMS 0x8E /* set execution parameters */
#define ICB_OP_GET_EPARMS 0x8F /* read execution parameters */
typedef struct icbRecvCmd {
unchar op;
unchar IDlun; /* Initiator SCSI ID/lun */
unchar len[3]; /* command buffer length */
unchar ptr[3]; /* command buffer address */
unchar rsvd[7]; /* reserved */
volatile unchar vue; /* vendor-unique error code */
volatile unchar status; /* returned (icmb) status */
volatile unchar phase; /* used by interrupt handler */
} IcbRecvCmd;
typedef struct icbSendStat {
unchar op;
unchar IDlun; /* Target SCSI ID/lun */
unchar stat; /* (outgoing) completion status byte 1 */
unchar rsvd[12]; /* reserved */
volatile unchar vue; /* vendor-unique error code */
volatile unchar status; /* returned (icmb) status */
volatile unchar phase; /* used by interrupt handler */
} IcbSendStat;
typedef struct icbRevLvl {
unchar op;
volatile unchar primary; /* primary revision level (returned) */
volatile unchar secondary; /* secondary revision level (returned) */
unchar rsvd[12]; /* reserved */
volatile unchar vue; /* vendor-unique error code */
volatile unchar status; /* returned (icmb) status */
volatile unchar phase; /* used by interrupt handler */
} IcbRevLvl;
typedef struct icbUnsMask { /* I'm totally guessing here */
unchar op;
volatile unchar mask[14]; /* mask bits */
#if 0
unchar rsvd[12]; /* reserved */
#endif
volatile unchar vue; /* vendor-unique error code */
volatile unchar status; /* returned (icmb) status */
volatile unchar phase; /* used by interrupt handler */
} IcbUnsMask;
typedef struct icbDiag {
unchar op;
unchar type; /* diagnostics type code (0-3) */
unchar len[3]; /* buffer length */
unchar ptr[3]; /* buffer address */
unchar rsvd[7]; /* reserved */
volatile unchar vue; /* vendor-unique error code */
volatile unchar status; /* returned (icmb) status */
volatile unchar phase; /* used by interrupt handler */
} IcbDiag;
#define ICB_DIAG_POWERUP 0 /* Power-up diags only */
#define ICB_DIAG_WALKING 1 /* walking 1's pattern */
#define ICB_DIAG_DMA 2 /* DMA - system memory diags */
#define ICB_DIAG_FULL 3 /* do both 1 & 2 */
typedef struct icbParms {
unchar op;
unchar rsvd1; /* reserved */
unchar len[3]; /* parms buffer length */
unchar ptr[3]; /* parms buffer address */
unchar idx[2]; /* index (MSB-LSB) */
unchar rsvd2[5]; /* reserved */
volatile unchar vue; /* vendor-unique error code */
volatile unchar status; /* returned (icmb) status */
volatile unchar phase; /* used by interrupt handler */
} IcbParms;
typedef struct icbAny {
unchar op;
unchar data[14]; /* format-specific data */
volatile unchar vue; /* vendor-unique error code */
volatile unchar status; /* returned (icmb) status */
volatile unchar phase; /* used by interrupt handler */
} IcbAny;
typedef union icb {
unchar op; /* ICB opcode */
IcbRecvCmd recv_cmd; /* format for receive command */
IcbSendStat send_stat; /* format for send status */
IcbRevLvl rev_lvl; /* format for get revision level */
IcbDiag diag; /* format for execute diagnostics */
IcbParms eparms; /* format for get/set exec parms */
IcbAny icb; /* generic format */
unchar data[18];
} Icb;
#ifdef MODULE
static char *wd7000;
module_param(wd7000, charp, 0);
#endif
/*
* Driver SCB structure pool.
*
* The SCBs declared here are shared by all host adapters; hence, this
* structure is not part of the Adapter structure.
*/
static Scb scbs[MAX_SCBS];
static Scb *scbfree; /* free list */
static int freescbs = MAX_SCBS; /* free list counter */
static spinlock_t scbpool_lock; /* guards the scb free list and count */
/*
* END of data/declarations - code follows.
*/
static void __init setup_error(char *mesg, int *ints)
{
if (ints[0] == 3)
printk(KERN_ERR "wd7000_setup: \"wd7000=%d,%d,0x%x\" -> %s\n", ints[1], ints[2], ints[3], mesg);
else if (ints[0] == 4)
printk(KERN_ERR "wd7000_setup: \"wd7000=%d,%d,0x%x,%d\" -> %s\n", ints[1], ints[2], ints[3], ints[4], mesg);
else
printk(KERN_ERR "wd7000_setup: \"wd7000=%d,%d,0x%x,%d,%d\" -> %s\n", ints[1], ints[2], ints[3], ints[4], ints[5], mesg);
}
/*
* Note: You can now set these options from the kernel's "command line".
* The syntax is:
*
* wd7000=<IRQ>,<DMA>,<IO>[,<BUS_ON>[,<BUS_OFF>]]
*
* , where BUS_ON and BUS_OFF are in nanoseconds. BIOS default values
* are 8000ns for BUS_ON and 1875ns for BUS_OFF.
* eg:
* wd7000=7,6,0x350
*
* will configure the driver for a WD-7000 controller
* using IRQ 15 with a DMA channel 6, at IO base address 0x350.
*/
static int __init wd7000_setup(char *str)
{
static short wd7000_card_num; /* .bss will zero this */
short i;
int ints[6];
(void) get_options(str, ARRAY_SIZE(ints), ints);
if (wd7000_card_num >= NUM_CONFIGS) {
printk(KERN_ERR "%s: Too many \"wd7000=\" configurations in " "command line!\n", __FUNCTION__);
return 0;
}
if ((ints[0] < 3) || (ints[0] > 5)) {
printk(KERN_ERR "%s: Error in command line! " "Usage: wd7000=<IRQ>,<DMA>,IO>[,<BUS_ON>" "[,<BUS_OFF>]]\n", __FUNCTION__);
} else {
for (i = 0; i < NUM_IRQS; i++)
if (ints[1] == wd7000_irq[i])
break;
if (i == NUM_IRQS) {
setup_error("invalid IRQ.", ints);
return 0;
} else
configs[wd7000_card_num].irq = ints[1];
for (i = 0; i < NUM_DMAS; i++)
if (ints[2] == wd7000_dma[i])
break;
if (i == NUM_DMAS) {
setup_error("invalid DMA channel.", ints);
return 0;
} else
configs[wd7000_card_num].dma = ints[2];
for (i = 0; i < NUM_IOPORTS; i++)
if (ints[3] == wd7000_iobase[i])
break;
if (i == NUM_IOPORTS) {
setup_error("invalid I/O base address.", ints);
return 0;
} else
configs[wd7000_card_num].iobase = ints[3];
if (ints[0] > 3) {
if ((ints[4] < 500) || (ints[4] > 31875)) {
setup_error("BUS_ON value is out of range (500" " to 31875 nanoseconds)!", ints);
configs[wd7000_card_num].bus_on = BUS_ON;
} else
configs[wd7000_card_num].bus_on = ints[4] / 125;
} else
configs[wd7000_card_num].bus_on = BUS_ON;
if (ints[0] > 4) {
if ((ints[5] < 500) || (ints[5] > 31875)) {
setup_error("BUS_OFF value is out of range (500" " to 31875 nanoseconds)!", ints);
configs[wd7000_card_num].bus_off = BUS_OFF;
} else
configs[wd7000_card_num].bus_off = ints[5] / 125;
} else
configs[wd7000_card_num].bus_off = BUS_OFF;
if (wd7000_card_num) {
for (i = 0; i < (wd7000_card_num - 1); i++) {
int j = i + 1;
for (; j < wd7000_card_num; j++)
if (configs[i].irq == configs[j].irq) {
setup_error("duplicated IRQ!", ints);
return 0;
}
if (configs[i].dma == configs[j].dma) {
setup_error("duplicated DMA " "channel!", ints);
return 0;
}
if (configs[i].iobase == configs[j].iobase) {
setup_error("duplicated I/O " "base address!", ints);
return 0;
}
}
}
dprintk(KERN_DEBUG "wd7000_setup: IRQ=%d, DMA=%d, I/O=0x%x, "
"BUS_ON=%dns, BUS_OFF=%dns\n", configs[wd7000_card_num].irq, configs[wd7000_card_num].dma, configs[wd7000_card_num].iobase, configs[wd7000_card_num].bus_on * 125, configs[wd7000_card_num].bus_off * 125);
wd7000_card_num++;
}
return 1;
}
__setup("wd7000=", wd7000_setup);
static inline void any2scsi(unchar * scsi, int any)
{
*scsi++ = (unsigned)any >> 16;
*scsi++ = (unsigned)any >> 8;
*scsi++ = any;
}
static inline int scsi2int(unchar * scsi)
{
return (scsi[0] << 16) | (scsi[1] << 8) | scsi[2];
}
static inline void wd7000_enable_intr(Adapter * host)
{
host->control |= INT_EN;
outb(host->control, host->iobase + ASC_CONTROL);
}
static inline void wd7000_enable_dma(Adapter * host)
{
unsigned long flags;
host->control |= DMA_EN;
outb(host->control, host->iobase + ASC_CONTROL);
flags = claim_dma_lock();
set_dma_mode(host->dma, DMA_MODE_CASCADE);
enable_dma(host->dma);
release_dma_lock(flags);
}
#define WAITnexttimeout 200 /* 2 seconds */
static inline short WAIT(unsigned port, unsigned mask, unsigned allof, unsigned noneof)
{
unsigned WAITbits;
unsigned long WAITtimeout = jiffies + WAITnexttimeout;
while (time_before_eq(jiffies, WAITtimeout)) {
WAITbits = inb(port) & mask;
if (((WAITbits & allof) == allof) && ((WAITbits & noneof) == 0))
return (0);
}
return (1);
}
static inline int command_out(Adapter * host, unchar * cmd, int len)
{
if (!WAIT(host->iobase + ASC_STAT, ASC_STATMASK, CMD_RDY, 0)) {
while (len--) {
do {
outb(*cmd, host->iobase + ASC_COMMAND);
WAIT(host->iobase + ASC_STAT, ASC_STATMASK, CMD_RDY, 0);
} while (inb(host->iobase + ASC_STAT) & CMD_REJ);
cmd++;
}
return (1);
}
printk(KERN_WARNING "wd7000 command_out: WAIT failed(%d)\n", len + 1);
return (0);
}
/*
* This version of alloc_scbs is in preparation for supporting multiple
* commands per lun and command chaining, by queueing pending commands.
* We will need to allocate Scbs in blocks since they will wait to be
* executed so there is the possibility of deadlock otherwise.
* Also, to keep larger requests from being starved by smaller requests,
* we limit access to this routine with an internal busy flag, so that
* the satisfiability of a request is not dependent on the size of the
* request.
*/
static inline Scb *alloc_scbs(struct Scsi_Host *host, int needed)
{
Scb *scb, *p = NULL;
unsigned long flags;
unsigned long timeout = jiffies + WAITnexttimeout;
unsigned long now;
int i;
if (needed <= 0)
return (NULL); /* sanity check */
spin_unlock_irq(host->host_lock);
retry:
while (freescbs < needed) {
timeout = jiffies + WAITnexttimeout;
do {
/* FIXME: can we actually just yield here ?? */
for (now = jiffies; now == jiffies;)
cpu_relax(); /* wait a jiffy */
} while (freescbs < needed && time_before_eq(jiffies, timeout));
/*
* If we get here with enough free Scbs, we can take them.
* Otherwise, we timed out and didn't get enough.
*/
if (freescbs < needed) {
printk(KERN_ERR "wd7000: can't get enough free SCBs.\n");
return (NULL);
}
}
/* Take the lock, then check we didnt get beaten, if so try again */
spin_lock_irqsave(&scbpool_lock, flags);
if (freescbs < needed) {
spin_unlock_irqrestore(&scbpool_lock, flags);
goto retry;
}
scb = scbfree;
freescbs -= needed;
for (i = 0; i < needed; i++) {
p = scbfree;
scbfree = p->next;
}
p->next = NULL;
spin_unlock_irqrestore(&scbpool_lock, flags);
spin_lock_irq(host->host_lock);
return (scb);
}
static inline void free_scb(Scb * scb)
{
unsigned long flags;
spin_lock_irqsave(&scbpool_lock, flags);
memset(scb, 0, sizeof(Scb));
scb->next = scbfree;
scbfree = scb;
freescbs++;
spin_unlock_irqrestore(&scbpool_lock, flags);
}
static inline void init_scbs(void)
{
int i;
spin_lock_init(&scbpool_lock);
/* This is only ever called before the SCB pool is active */
scbfree = &(scbs[0]);
memset(scbs, 0, sizeof(scbs));
for (i = 0; i < MAX_SCBS - 1; i++) {
scbs[i].next = &(scbs[i + 1]);
scbs[i].SCpnt = NULL;
}
scbs[MAX_SCBS - 1].next = NULL;
scbs[MAX_SCBS - 1].SCpnt = NULL;
}
static int mail_out(Adapter * host, Scb * scbptr)
/*
* Note: this can also be used for ICBs; just cast to the parm type.
*/
{
int i, ogmb;
unsigned long flags;
unchar start_ogmb;
Mailbox *ogmbs = host->mb.ogmb;
int *next_ogmb = &(host->next_ogmb);
dprintk("wd7000_mail_out: 0x%06lx", (long) scbptr);
/* We first look for a free outgoing mailbox */
spin_lock_irqsave(host->sh->host_lock, flags);
ogmb = *next_ogmb;
for (i = 0; i < OGMB_CNT; i++) {
if (ogmbs[ogmb].status == 0) {
dprintk(" using OGMB 0x%x", ogmb);
ogmbs[ogmb].status = 1;
any2scsi((unchar *) ogmbs[ogmb].scbptr, (int) scbptr);
*next_ogmb = (ogmb + 1) % OGMB_CNT;
break;
} else
ogmb = (ogmb + 1) % OGMB_CNT;
}
spin_unlock_irqrestore(host->sh->host_lock, flags);
dprintk(", scb is 0x%06lx", (long) scbptr);
if (i >= OGMB_CNT) {
/*
* Alternatively, we might issue the "interrupt on free OGMB",
* and sleep, but it must be ensured that it isn't the init
* task running. Instead, this version assumes that the caller
* will be persistent, and try again. Since it's the adapter
* that marks OGMB's free, waiting even with interrupts off
* should work, since they are freed very quickly in most cases.
*/
dprintk(", no free OGMBs.\n");
return (0);
}
wd7000_enable_intr(host);
start_ogmb = START_OGMB | ogmb;
command_out(host, &start_ogmb, 1);
dprintk(", awaiting interrupt.\n");
return (1);
}
static int make_code(unsigned hosterr, unsigned scsierr)
{
#ifdef WD7000_DEBUG
int in_error = hosterr;
#endif
switch ((hosterr >> 8) & 0xff) {
case 0: /* Reserved */
hosterr = DID_ERROR;
break;
case 1: /* Command Complete, no errors */
hosterr = DID_OK;
break;
case 2: /* Command complete, error logged in scb status (scsierr) */
hosterr = DID_OK;
break;
case 4: /* Command failed to complete - timeout */
hosterr = DID_TIME_OUT;
break;
case 5: /* Command terminated; Bus reset by external device */
hosterr = DID_RESET;
break;
case 6: /* Unexpected Command Received w/ host as target */
hosterr = DID_BAD_TARGET;
break;
case 80: /* Unexpected Reselection */
case 81: /* Unexpected Selection */
hosterr = DID_BAD_INTR;
break;
case 82: /* Abort Command Message */
hosterr = DID_ABORT;
break;
case 83: /* SCSI Bus Software Reset */
case 84: /* SCSI Bus Hardware Reset */
hosterr = DID_RESET;
break;
default: /* Reserved */
hosterr = DID_ERROR;
}
#ifdef WD7000_DEBUG
if (scsierr || hosterr)
dprintk("\nSCSI command error: SCSI 0x%02x host 0x%04x return %d\n", scsierr, in_error, hosterr);
#endif
return (scsierr | (hosterr << 16));
}
#define wd7000_intr_ack(host) outb (0, host->iobase + ASC_INTR_ACK)
static irqreturn_t wd7000_intr(int irq, void *dev_id, struct pt_regs *regs)
{
Adapter *host = (Adapter *) dev_id;
int flag, icmb, errstatus, icmb_status;
int host_error, scsi_error;
Scb *scb; /* for SCSI commands */
IcbAny *icb; /* for host commands */
struct scsi_cmnd *SCpnt;
Mailbox *icmbs = host->mb.icmb;
unsigned long flags;
spin_lock_irqsave(host->sh->host_lock, flags);
host->int_counter++;
dprintk("wd7000_intr: irq = %d, host = 0x%06lx\n", irq, (long) host);
flag = inb(host->iobase + ASC_INTR_STAT);
dprintk("wd7000_intr: intr stat = 0x%02x\n", flag);
if (!(inb(host->iobase + ASC_STAT) & INT_IM)) {
/* NB: these are _very_ possible if IRQ 15 is being used, since
* it's the "garbage collector" on the 2nd 8259 PIC. Specifically,
* any interrupt signal into the 8259 which can't be identified
* comes out as 7 from the 8259, which is 15 to the host. Thus, it
* is a good thing the WD7000 has an interrupt status port, so we
* can sort these out. Otherwise, electrical noise and other such
* problems would be indistinguishable from valid interrupts...
*/
dprintk("wd7000_intr: phantom interrupt...\n");
goto ack;
}
if (!(flag & MB_INTR))
goto ack;
/* The interrupt is for a mailbox */
if (!(flag & IMB_INTR)) {
dprintk("wd7000_intr: free outgoing mailbox\n");
/*
* If sleep_on() and the "interrupt on free OGMB" command are
* used in mail_out(), wake_up() should correspondingly be called
* here. For now, we don't need to do anything special.
*/
goto ack;
}
/* The interrupt is for an incoming mailbox */
icmb = flag & MB_MASK;
icmb_status = icmbs[icmb].status;
if (icmb_status & 0x80) { /* unsolicited - result in ICMB */
dprintk("wd7000_intr: unsolicited interrupt 0x%02x\n", icmb_status);
goto ack;
}
/* Aaaargh! (Zaga) */
scb = isa_bus_to_virt(scsi2int((unchar *) icmbs[icmb].scbptr));
icmbs[icmb].status = 0;
if (scb->op & ICB_OP_MASK) { /* an SCB is done */
icb = (IcbAny *) scb;
icb->status = icmb_status;
icb->phase = 0;
goto ack;
}
SCpnt = scb->SCpnt;
if (--(SCpnt->SCp.phase) <= 0) { /* all scbs are done */
host_error = scb->vue | (icmb_status << 8);
scsi_error = scb->status;
errstatus = make_code(host_error, scsi_error);
SCpnt->result = errstatus;
free_scb(scb);
SCpnt->scsi_done(SCpnt);
}
ack:
dprintk("wd7000_intr: return from interrupt handler\n");
wd7000_intr_ack(host);
spin_unlock_irqrestore(host->sh->host_lock, flags);
return IRQ_HANDLED;
}
static int wd7000_queuecommand(struct scsi_cmnd *SCpnt,
void (*done)(struct scsi_cmnd *))
{
Scb *scb;
Sgb *sgb;
unchar *cdb = (unchar *) SCpnt->cmnd;
unchar idlun;
short cdblen;
Adapter *host = (Adapter *) SCpnt->device->host->hostdata;
cdblen = SCpnt->cmd_len;
idlun = ((SCpnt->device->id << 5) & 0xe0) | (SCpnt->device->lun & 7);
SCpnt->scsi_done = done;
SCpnt->SCp.phase = 1;
scb = alloc_scbs(SCpnt->device->host, 1);
scb->idlun = idlun;
memcpy(scb->cdb, cdb, cdblen);
scb->direc = 0x40; /* Disable direction check */
scb->SCpnt = SCpnt; /* so we can find stuff later */
SCpnt->host_scribble = (unchar *) scb;
scb->host = host;
if (SCpnt->use_sg) {
struct scatterlist *sg = (struct scatterlist *) SCpnt->request_buffer;
unsigned i;
if (SCpnt->device->host->sg_tablesize == SG_NONE) {
panic("wd7000_queuecommand: scatter/gather not supported.\n");
}
dprintk("Using scatter/gather with %d elements.\n", SCpnt->use_sg);
sgb = scb->sgb;
scb->op = 1;
any2scsi(scb->dataptr, (int) sgb);
any2scsi(scb->maxlen, SCpnt->use_sg * sizeof(Sgb));
for (i = 0; i < SCpnt->use_sg; i++) {
any2scsi(sgb[i].ptr, isa_page_to_bus(sg[i].page) + sg[i].offset);
any2scsi(sgb[i].len, sg[i].length);
}
} else {
scb->op = 0;
any2scsi(scb->dataptr, isa_virt_to_bus(SCpnt->request_buffer));
any2scsi(scb->maxlen, SCpnt->request_bufflen);
}
/* FIXME: drop lock and yield here ? */
while (!mail_out(host, scb))
cpu_relax(); /* keep trying */
return 0;
}
static int wd7000_diagnostics(Adapter * host, int code)
{
static IcbDiag icb = { ICB_OP_DIAGNOSTICS };
static unchar buf[256];
unsigned long timeout;
icb.type = code;
any2scsi(icb.len, sizeof(buf));
any2scsi(icb.ptr, (int) &buf);
icb.phase = 1;
/*
* This routine is only called at init, so there should be OGMBs
* available. I'm assuming so here. If this is going to
* fail, I can just let the timeout catch the failure.
*/
mail_out(host, (struct scb *) &icb);
timeout = jiffies + WAITnexttimeout; /* wait up to 2 seconds */
while (icb.phase && time_before(jiffies, timeout)) {
cpu_relax(); /* wait for completion */
barrier();
}
if (icb.phase) {
printk("wd7000_diagnostics: timed out.\n");
return (0);
}
if (make_code(icb.vue | (icb.status << 8), 0)) {
printk("wd7000_diagnostics: failed (0x%02x,0x%02x)\n", icb.vue, icb.status);
return (0);
}
return (1);
}
static int wd7000_adapter_reset(Adapter * host)
{
InitCmd init_cmd = {
INITIALIZATION,
7,
host->bus_on,
host->bus_off,
0,
{0, 0, 0},
OGMB_CNT,
ICMB_CNT
};
int diag;
/*
* Reset the adapter - only. The SCSI bus was initialized at power-up,
* and we need to do this just so we control the mailboxes, etc.
*/
outb(ASC_RES, host->iobase + ASC_CONTROL);
udelay(40); /* reset pulse: this is 40us, only need 25us */
outb(0, host->iobase + ASC_CONTROL);
host->control = 0; /* this must always shadow ASC_CONTROL */
if (WAIT(host->iobase + ASC_STAT, ASC_STATMASK, CMD_RDY, 0)) {
printk(KERN_ERR "wd7000_init: WAIT timed out.\n");
return -1; /* -1 = not ok */
}
if ((diag = inb(host->iobase + ASC_INTR_STAT)) != 1) {
printk("wd7000_init: ");
switch (diag) {
case 2:
printk(KERN_ERR "RAM failure.\n");
break;
case 3:
printk(KERN_ERR "FIFO R/W failed\n");
break;
case 4:
printk(KERN_ERR "SBIC register R/W failed\n");
break;
case 5:
printk(KERN_ERR "Initialization D-FF failed.\n");
break;
case 6:
printk(KERN_ERR "Host IRQ D-FF failed.\n");
break;
case 7:
printk(KERN_ERR "ROM checksum error.\n");
break;
default:
printk(KERN_ERR "diagnostic code 0x%02Xh received.\n", diag);
}
return -1;
}
/* Clear mailboxes */
memset(&(host->mb), 0, sizeof(host->mb));
/* Execute init command */
any2scsi((unchar *) & (init_cmd.mailboxes), (int) &(host->mb));
if (!command_out(host, (unchar *) & init_cmd, sizeof(init_cmd))) {
printk(KERN_ERR "wd7000_adapter_reset: adapter initialization failed.\n");
return -1;
}
if (WAIT(host->iobase + ASC_STAT, ASC_STATMASK, ASC_INIT, 0)) {
printk("wd7000_adapter_reset: WAIT timed out.\n");
return -1;
}
return 0;
}
static int wd7000_init(Adapter * host)
{
if (wd7000_adapter_reset(host) == -1)
return 0;
if (request_irq(host->irq, wd7000_intr, SA_INTERRUPT, "wd7000", host)) {
printk("wd7000_init: can't get IRQ %d.\n", host->irq);
return (0);
}
if (request_dma(host->dma, "wd7000")) {
printk("wd7000_init: can't get DMA channel %d.\n", host->dma);
free_irq(host->irq, host);
return (0);
}
wd7000_enable_dma(host);
wd7000_enable_intr(host);
if (!wd7000_diagnostics(host, ICB_DIAG_FULL)) {
free_dma(host->dma);
free_irq(host->irq, NULL);
return (0);
}
return (1);
}
static void wd7000_revision(Adapter * host)
{
static IcbRevLvl icb = { ICB_OP_GET_REVISION };
icb.phase = 1;
/*
* Like diagnostics, this is only done at init time, in fact, from
* wd7000_detect, so there should be OGMBs available. If it fails,
* the only damage will be that the revision will show up as 0.0,
* which in turn means that scatter/gather will be disabled.
*/
mail_out(host, (struct scb *) &icb);
while (icb.phase) {
cpu_relax(); /* wait for completion */
barrier();
}
host->rev1 = icb.primary;
host->rev2 = icb.secondary;
}
#undef SPRINTF
#define SPRINTF(args...) { if (pos < (buffer + length)) pos += sprintf (pos, ## args); }
static int wd7000_set_info(char *buffer, int length, struct Scsi_Host *host)
{
dprintk("Buffer = <%.*s>, length = %d\n", length, buffer, length);
/*
* Currently this is a no-op
*/
dprintk("Sorry, this function is currently out of order...\n");
return (length);
}
static int wd7000_proc_info(struct Scsi_Host *host, char *buffer, char **start, off_t offset, int length, int inout)
{
Adapter *adapter = (Adapter *)host->hostdata;
unsigned long flags;
char *pos = buffer;
#ifdef WD7000_DEBUG
Mailbox *ogmbs, *icmbs;
short count;
#endif
/*
* Has data been written to the file ?
*/
if (inout)
return (wd7000_set_info(buffer, length, host));
spin_lock_irqsave(host->host_lock, flags);
SPRINTF("Host scsi%d: Western Digital WD-7000 (rev %d.%d)\n", host->host_no, adapter->rev1, adapter->rev2);
SPRINTF(" IO base: 0x%x\n", adapter->iobase);
SPRINTF(" IRQ: %d\n", adapter->irq);
SPRINTF(" DMA channel: %d\n", adapter->dma);
SPRINTF(" Interrupts: %d\n", adapter->int_counter);
SPRINTF(" BUS_ON time: %d nanoseconds\n", adapter->bus_on * 125);
SPRINTF(" BUS_OFF time: %d nanoseconds\n", adapter->bus_off * 125);
#ifdef WD7000_DEBUG
ogmbs = adapter->mb.ogmb;
icmbs = adapter->mb.icmb;
SPRINTF("\nControl port value: 0x%x\n", adapter->control);
SPRINTF("Incoming mailbox:\n");
SPRINTF(" size: %d\n", ICMB_CNT);
SPRINTF(" queued messages: ");
for (i = count = 0; i < ICMB_CNT; i++)
if (icmbs[i].status) {
count++;
SPRINTF("0x%x ", i);
}
SPRINTF(count ? "\n" : "none\n");
SPRINTF("Outgoing mailbox:\n");
SPRINTF(" size: %d\n", OGMB_CNT);
SPRINTF(" next message: 0x%x\n", adapter->next_ogmb);
SPRINTF(" queued messages: ");
for (i = count = 0; i < OGMB_CNT; i++)
if (ogmbs[i].status) {
count++;
SPRINTF("0x%x ", i);
}
SPRINTF(count ? "\n" : "none\n");
#endif
spin_unlock_irqrestore(host->host_lock, flags);
/*
* Calculate start of next buffer, and return value.
*/
*start = buffer + offset;
if ((pos - buffer) < offset)
return (0);
else if ((pos - buffer - offset) < length)
return (pos - buffer - offset);
else
return (length);
}
/*
* Returns the number of adapters this driver is supporting.
*
* The source for hosts.c says to wait to call scsi_register until 100%
* sure about an adapter. We need to do it a little sooner here; we
* need the storage set up by scsi_register before wd7000_init, and
* changing the location of an Adapter structure is more trouble than
* calling scsi_unregister.
*
*/
static int wd7000_detect(struct scsi_host_template *tpnt)
{
short present = 0, biosaddr_ptr, sig_ptr, i, pass;
short biosptr[NUM_CONFIGS];
unsigned iobase;
Adapter *host = NULL;
struct Scsi_Host *sh;
int unit = 0;
dprintk("wd7000_detect: started\n");
#ifdef MODULE
if (wd7000)
wd7000_setup(wd7000);
#endif
for (i = 0; i < UNITS; wd7000_host[i++] = NULL);
for (i = 0; i < NUM_CONFIGS; biosptr[i++] = -1);
tpnt->proc_name = "wd7000";
tpnt->proc_info = &wd7000_proc_info;
/*
* Set up SCB free list, which is shared by all adapters
*/
init_scbs();
for (pass = 0; pass < NUM_CONFIGS; pass++) {
/*
* First, search for BIOS SIGNATURE...
*/
for (biosaddr_ptr = 0; biosaddr_ptr < NUM_ADDRS; biosaddr_ptr++)
for (sig_ptr = 0; sig_ptr < NUM_SIGNATURES; sig_ptr++) {
for (i = 0; i < pass; i++)
if (biosptr[i] == biosaddr_ptr)
break;
if (i == pass) {
void __iomem *biosaddr = ioremap(wd7000_biosaddr[biosaddr_ptr] + signatures[sig_ptr].ofs,
signatures[sig_ptr].len);
short bios_match = 1;
if (biosaddr)
bios_match = check_signature(biosaddr, signatures[sig_ptr].sig, signatures[sig_ptr].len);
iounmap(biosaddr);
if (bios_match)
goto bios_matched;
}
}
bios_matched:
/*
* BIOS SIGNATURE has been found.
*/
#ifdef WD7000_DEBUG
dprintk("wd7000_detect: pass %d\n", pass + 1);
if (biosaddr_ptr == NUM_ADDRS)
dprintk("WD-7000 SST BIOS not detected...\n");
else
dprintk("WD-7000 SST BIOS detected at 0x%lx: checking...\n", wd7000_biosaddr[biosaddr_ptr]);
#endif
if (configs[pass].irq < 0)
continue;
if (unit == UNITS)
continue;
iobase = configs[pass].iobase;
dprintk("wd7000_detect: check IO 0x%x region...\n", iobase);
if (request_region(iobase, 4, "wd7000")) {
dprintk("wd7000_detect: ASC reset (IO 0x%x) ...", iobase);
/*
* ASC reset...
*/
outb(ASC_RES, iobase + ASC_CONTROL);
msleep(10);
outb(0, iobase + ASC_CONTROL);
if (WAIT(iobase + ASC_STAT, ASC_STATMASK, CMD_RDY, 0)) {
dprintk("failed!\n");
goto err_release;
} else
dprintk("ok!\n");
if (inb(iobase + ASC_INTR_STAT) == 1) {
/*
* We register here, to get a pointer to the extra space,
* which we'll use as the Adapter structure (host) for
* this adapter. It is located just after the registered
* Scsi_Host structure (sh), and is located by the empty
* array hostdata.
*/
sh = scsi_register(tpnt, sizeof(Adapter));
if (sh == NULL)
goto err_release;
host = (Adapter *) sh->hostdata;
dprintk("wd7000_detect: adapter allocated at 0x%x\n", (int) host);
memset(host, 0, sizeof(Adapter));
host->irq = configs[pass].irq;
host->dma = configs[pass].dma;
host->iobase = iobase;
host->int_counter = 0;
host->bus_on = configs[pass].bus_on;
host->bus_off = configs[pass].bus_off;
host->sh = wd7000_host[unit] = sh;
unit++;
dprintk("wd7000_detect: Trying init WD-7000 card at IO " "0x%x, IRQ %d, DMA %d...\n", host->iobase, host->irq, host->dma);
if (!wd7000_init(host)) /* Initialization failed */
goto err_unregister;
/*
* OK from here - we'll use this adapter/configuration.
*/
wd7000_revision(host); /* important for scatter/gather */
/*
* For boards before rev 6.0, scatter/gather isn't supported.
*/
if (host->rev1 < 6)
sh->sg_tablesize = SG_NONE;
present++; /* count it */
if (biosaddr_ptr != NUM_ADDRS)
biosptr[pass] = biosaddr_ptr;
printk(KERN_INFO "Western Digital WD-7000 (rev %d.%d) ", host->rev1, host->rev2);
printk("using IO 0x%x, IRQ %d, DMA %d.\n", host->iobase, host->irq, host->dma);
printk(" BUS_ON time: %dns, BUS_OFF time: %dns\n", host->bus_on * 125, host->bus_off * 125);
}
} else
dprintk("wd7000_detect: IO 0x%x region already allocated!\n", iobase);
continue;
err_unregister:
scsi_unregister(sh);
err_release:
release_region(iobase, 4);
}
if (!present)
printk("Failed initialization of WD-7000 SCSI card!\n");
return (present);
}
static int wd7000_release(struct Scsi_Host *shost)
{
if (shost->irq)
free_irq(shost->irq, NULL);
if (shost->io_port && shost->n_io_port)
release_region(shost->io_port, shost->n_io_port);
scsi_unregister(shost);
return 0;
}
#if 0
/*
* I have absolutely NO idea how to do an abort with the WD7000...
*/
static int wd7000_abort(Scsi_Cmnd * SCpnt)
{
Adapter *host = (Adapter *) SCpnt->device->host->hostdata;
if (inb(host->iobase + ASC_STAT) & INT_IM) {
printk("wd7000_abort: lost interrupt\n");
wd7000_intr_handle(host->irq, NULL, NULL);
return FAILED;
}
return FAILED;
}
#endif
/*
* Last resort. Reinitialize the board.
*/
static int wd7000_host_reset(struct scsi_cmnd *SCpnt)
{
Adapter *host = (Adapter *) SCpnt->device->host->hostdata;
spin_unlock_irq(SCpnt->device->host->host_lock);
if (wd7000_adapter_reset(host) < 0) {
spin_unlock_irq(SCpnt->device->host->host_lock);
return FAILED;
}
wd7000_enable_intr(host);
spin_unlock_irq(SCpnt->device->host->host_lock);
return SUCCESS;
}
/*
* This was borrowed directly from aha1542.c. (Zaga)
*/
static int wd7000_biosparam(struct scsi_device *sdev,
struct block_device *bdev, sector_t capacity, int *ip)
{
char b[BDEVNAME_SIZE];
dprintk("wd7000_biosparam: dev=%s, size=%d, ",
bdevname(bdev, b), capacity);
(void)b; /* unused var warning? */
/*
* try default translation
*/
ip[0] = 64;
ip[1] = 32;
ip[2] = capacity >> 11;
/*
* for disks >1GB do some guessing
*/
if (ip[2] >= 1024) {
int info[3];
/*
* try to figure out the geometry from the partition table
*/
if ((scsicam_bios_param(bdev, capacity, info) < 0) || !(((info[0] == 64) && (info[1] == 32)) || ((info[0] == 255) && (info[1] == 63)))) {
printk("wd7000_biosparam: unable to verify geometry for disk with >1GB.\n" " using extended translation.\n");
ip[0] = 255;
ip[1] = 63;
ip[2] = (unsigned long) capacity / (255 * 63);
} else {
ip[0] = info[0];
ip[1] = info[1];
ip[2] = info[2];
if (info[0] == 255)
printk(KERN_INFO "%s: current partition table is " "using extended translation.\n", __FUNCTION__);
}
}
dprintk("bios geometry: head=%d, sec=%d, cyl=%d\n", ip[0], ip[1], ip[2]);
dprintk("WARNING: check, if the bios geometry is correct.\n");
return (0);
}
MODULE_AUTHOR("Thomas Wuensche, John Boyd, Miroslav Zagorac");
MODULE_DESCRIPTION("Driver for the WD7000 series ISA controllers");
MODULE_LICENSE("GPL");
static struct scsi_host_template driver_template = {
.proc_name = "wd7000",
.proc_info = wd7000_proc_info,
.name = "Western Digital WD-7000",
.detect = wd7000_detect,
.release = wd7000_release,
.queuecommand = wd7000_queuecommand,
.eh_host_reset_handler = wd7000_host_reset,
.bios_param = wd7000_biosparam,
.can_queue = WD7000_Q,
.this_id = 7,
.sg_tablesize = WD7000_SG,
.cmd_per_lun = 1,
.unchecked_isa_dma = 1,
.use_clustering = ENABLE_CLUSTERING,
};
#include "scsi_module.c"
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