aha1542.c
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- /* $Id: aha1542.c,v 1.1 1992/07/24 06:27:38 root Exp root $
- * linux/kernel/aha1542.c
- *
- * Copyright (C) 1992 Tommy Thorn
- * Copyright (C) 1993, 1994, 1995 Eric Youngdale
- *
- * Modified by Eric Youngdale
- * Use request_irq and request_dma to help prevent unexpected conflicts
- * Set up on-board DMA controller, such that we do not have to
- * have the bios enabled to use the aha1542.
- * Modified by David Gentzel
- * Don't call request_dma if dma mask is 0 (for BusLogic BT-445S VL-Bus
- * controller).
- * Modified by Matti Aarnio
- * Accept parameters from LILO cmd-line. -- 1-Oct-94
- * Modified by Mike McLagan <mike.mclagan@linux.org>
- * Recognise extended mode on AHA1542CP, different bit than 1542CF
- * 1-Jan-97
- * Modified by Bjorn L. Thordarson and Einar Thor Einarsson
- * Recognize that DMA0 is valid DMA channel -- 13-Jul-98
- * Modified by Chris Faulhaber <jedgar@fxp.org>
- * Added module command-line options
- * 19-Jul-99
- * Modified by Adam Fritzler <mid@auk.cx>
- * Added proper detection of the AHA-1640 (MCA version of AHA-1540)
- */
- #include <linux/config.h>
- #include <linux/module.h>
- #include <linux/kernel.h>
- #include <linux/types.h>
- #include <linux/string.h>
- #include <linux/ioport.h>
- #include <linux/delay.h>
- #include <linux/sched.h>
- #include <linux/proc_fs.h>
- #include <linux/init.h>
- #include <linux/spinlock.h>
- #include <linux/pci.h>
- #include <linux/isapnp.h>
- #include <asm/dma.h>
- #include <asm/system.h>
- #include <asm/io.h>
- #include <linux/blk.h>
- #include <linux/mca.h>
- #include "scsi.h"
- #include "hosts.h"
- #include "aha1542.h"
- #define SCSI_PA(address) virt_to_bus(address)
- static void BAD_DMA(void *address, unsigned int length)
- {
- printk(KERN_CRIT "buf vaddress %p paddress 0x%lx length %dn",
- address,
- SCSI_PA(address),
- length);
- panic("Buffer at physical address > 16Mb used for aha1542");
- }
- static void BAD_SG_DMA(Scsi_Cmnd * SCpnt,
- struct scatterlist *sgpnt,
- int nseg,
- int badseg)
- {
- printk(KERN_CRIT "sgpnt[%d:%d] addr %p/0x%lx length %dn",
- badseg, nseg,
- sgpnt[badseg].address,
- SCSI_PA(sgpnt[badseg].address),
- sgpnt[badseg].length);
- /*
- * Not safe to continue.
- */
- panic("Buffer at physical address > 16Mb used for aha1542");
- }
- #include<linux/stat.h>
- #ifdef DEBUG
- #define DEB(x) x
- #else
- #define DEB(x)
- #endif
- /*
- static const char RCSid[] = "$Header: /usr/src/linux/kernel/blk_drv/scsi/RCS/aha1542.c,v 1.1 1992/07/24 06:27:38 root Exp root $";
- */
- /* The adaptec can be configured for quite a number of addresses, but
- I generally do not want the card poking around at random. We allow
- two addresses - this allows people to use the Adaptec with a Midi
- card, which also used 0x330 -- can be overridden with LILO! */
- #define MAXBOARDS 4 /* Increase this and the sizes of the
- arrays below, if you need more.. */
- /* Boards 3,4 slots are reserved for ISAPnP/MCA scans */
- static unsigned int bases[MAXBOARDS] __initdata = {0x330, 0x334, 0, 0};
- /* set by aha1542_setup according to the command line; they also may
- be marked __initdata, but require zero initializers then */
- static int setup_called[MAXBOARDS];
- static int setup_buson[MAXBOARDS];
- static int setup_busoff[MAXBOARDS];
- static int setup_dmaspeed[MAXBOARDS] __initdata = { -1, -1, -1, -1 };
- static char *setup_str[MAXBOARDS] __initdata;
- /*
- * LILO/Module params: aha1542=<PORTBASE>[,<BUSON>,<BUSOFF>[,<DMASPEED>]]
- *
- * Where: <PORTBASE> is any of the valid AHA addresses:
- * 0x130, 0x134, 0x230, 0x234, 0x330, 0x334
- * <BUSON> is the time (in microsecs) that AHA spends on the AT-bus
- * when transferring data. 1542A power-on default is 11us,
- * valid values are in range: 2..15 (decimal)
- * <BUSOFF> is the time that AHA spends OFF THE BUS after while
- * it is transferring data (not to monopolize the bus).
- * Power-on default is 4us, valid range: 1..64 microseconds.
- * <DMASPEED> Default is jumper selected (1542A: on the J1),
- * but experimenter can alter it with this.
- * Valid values: 5, 6, 7, 8, 10 (MB/s)
- * Factory default is 5 MB/s.
- */
- #if defined(MODULE)
- int isapnp = 0;
- int aha1542[] = {0x330, 11, 4, -1};
- MODULE_PARM(aha1542, "1-4i");
- MODULE_PARM(isapnp, "i");
- static struct isapnp_device_id id_table[] __initdata = {
- {
- ISAPNP_ANY_ID, ISAPNP_ANY_ID,
- ISAPNP_VENDOR('A', 'D', 'P'), ISAPNP_FUNCTION(0x1542),
- 0
- },
- {0}
- };
- MODULE_DEVICE_TABLE(isapnp, id_table);
- #else
- static int isapnp = 1;
- #endif
- #define BIOS_TRANSLATION_1632 0 /* Used by some old 1542A boards */
- #define BIOS_TRANSLATION_6432 1 /* Default case these days */
- #define BIOS_TRANSLATION_25563 2 /* Big disk case */
- struct aha1542_hostdata {
- /* This will effectively start both of them at the first mailbox */
- int bios_translation; /* Mapping bios uses - for compatibility */
- int aha1542_last_mbi_used;
- int aha1542_last_mbo_used;
- Scsi_Cmnd *SCint[AHA1542_MAILBOXES];
- struct mailbox mb[2 * AHA1542_MAILBOXES];
- struct ccb ccb[AHA1542_MAILBOXES];
- };
- #define HOSTDATA(host) ((struct aha1542_hostdata *) &host->hostdata)
- static struct Scsi_Host *aha_host[7]; /* One for each IRQ level (9-15) */
- #define WAITnexttimeout 3000000
- static void setup_mailboxes(int base_io, struct Scsi_Host *shpnt);
- static int aha1542_restart(struct Scsi_Host *shost);
- static void aha1542_intr_handle(int irq, void *dev_id, struct pt_regs *regs);
- static void do_aha1542_intr_handle(int irq, void *dev_id, struct pt_regs *regs);
- #define aha1542_intr_reset(base) outb(IRST, CONTROL(base))
- #define WAIT(port, mask, allof, noneof)
- { register int WAITbits;
- register int WAITtimeout = WAITnexttimeout;
- while (1) {
- WAITbits = inb(port) & (mask);
- if ((WAITbits & (allof)) == (allof) && ((WAITbits & (noneof)) == 0))
- break;
- if (--WAITtimeout == 0) goto fail;
- }
- }
- /* Similar to WAIT, except we use the udelay call to regulate the
- amount of time we wait. */
- #define WAITd(port, mask, allof, noneof, timeout)
- { register int WAITbits;
- register int WAITtimeout = timeout;
- while (1) {
- WAITbits = inb(port) & (mask);
- if ((WAITbits & (allof)) == (allof) && ((WAITbits & (noneof)) == 0))
- break;
- mdelay(1);
- if (--WAITtimeout == 0) goto fail;
- }
- }
- static void aha1542_stat(void)
- {
- /* int s = inb(STATUS), i = inb(INTRFLAGS);
- printk("status=%x intrflags=%xn", s, i, WAITnexttimeout-WAITtimeout); */
- }
- /* This is a bit complicated, but we need to make sure that an interrupt
- routine does not send something out while we are in the middle of this.
- Fortunately, it is only at boot time that multi-byte messages
- are ever sent. */
- static int aha1542_out(unsigned int base, unchar * cmdp, int len)
- {
- unsigned long flags = 0;
- save_flags(flags);
- if (len == 1) {
- while (1 == 1) {
- WAIT(STATUS(base), CDF, 0, CDF);
- cli();
- if (inb(STATUS(base)) & CDF) {
- restore_flags(flags);
- continue;
- }
- outb(*cmdp, DATA(base));
- restore_flags(flags);
- return 0;
- }
- } else {
- cli();
- while (len--) {
- WAIT(STATUS(base), CDF, 0, CDF);
- outb(*cmdp++, DATA(base));
- }
- restore_flags(flags);
- }
- return 0;
- fail:
- restore_flags(flags);
- printk(KERN_ERR "aha1542_out failed(%d): ", len + 1);
- aha1542_stat();
- return 1;
- }
- /* Only used at boot time, so we do not need to worry about latency as much
- here */
- static int __init aha1542_in(unsigned int base, unchar * cmdp, int len)
- {
- unsigned long flags;
- save_flags(flags);
- cli();
- while (len--) {
- WAIT(STATUS(base), DF, DF, 0);
- *cmdp++ = inb(DATA(base));
- }
- restore_flags(flags);
- return 0;
- fail:
- restore_flags(flags);
- printk(KERN_ERR "aha1542_in failed(%d): ", len + 1);
- aha1542_stat();
- return 1;
- }
- /* Similar to aha1542_in, except that we wait a very short period of time.
- We use this if we know the board is alive and awake, but we are not sure
- if the board will respond to the command we are about to send or not */
- static int __init aha1542_in1(unsigned int base, unchar * cmdp, int len)
- {
- unsigned long flags;
- save_flags(flags);
- cli();
- while (len--) {
- WAITd(STATUS(base), DF, DF, 0, 100);
- *cmdp++ = inb(DATA(base));
- }
- restore_flags(flags);
- return 0;
- fail:
- restore_flags(flags);
- return 1;
- }
- static int makecode(unsigned hosterr, unsigned scsierr)
- {
- switch (hosterr) {
- case 0x0:
- case 0xa: /* Linked command complete without error and linked normally */
- case 0xb: /* Linked command complete without error, interrupt generated */
- hosterr = 0;
- break;
- case 0x11: /* Selection time out-The initiator selection or target
- reselection was not complete within the SCSI Time out period */
- hosterr = DID_TIME_OUT;
- break;
- case 0x12: /* Data overrun/underrun-The target attempted to transfer more data
- than was allocated by the Data Length field or the sum of the
- Scatter / Gather Data Length fields. */
- case 0x13: /* Unexpected bus free-The target dropped the SCSI BSY at an unexpected time. */
- case 0x15: /* MBO command was not 00, 01 or 02-The first byte of the CB was
- invalid. This usually indicates a software failure. */
- case 0x16: /* Invalid CCB Operation Code-The first byte of the CCB was invalid.
- This usually indicates a software failure. */
- case 0x17: /* Linked CCB does not have the same LUN-A subsequent CCB of a set
- of linked CCB's does not specify the same logical unit number as
- the first. */
- case 0x18: /* Invalid Target Direction received from Host-The direction of a
- Target Mode CCB was invalid. */
- case 0x19: /* Duplicate CCB Received in Target Mode-More than once CCB was
- received to service data transfer between the same target LUN
- and initiator SCSI ID in the same direction. */
- case 0x1a: /* Invalid CCB or Segment List Parameter-A segment list with a zero
- length segment or invalid segment list boundaries was received.
- A CCB parameter was invalid. */
- DEB(printk("Aha1542: %x %xn", hosterr, scsierr));
- hosterr = DID_ERROR; /* Couldn't find any better */
- break;
- case 0x14: /* Target bus phase sequence failure-An invalid bus phase or bus
- phase sequence was requested by the target. The host adapter
- will generate a SCSI Reset Condition, notifying the host with
- a SCRD interrupt */
- hosterr = DID_RESET;
- break;
- default:
- printk(KERN_ERR "aha1542: makecode: unknown hoststatus %xn", hosterr);
- break;
- }
- return scsierr | (hosterr << 16);
- }
- static int __init aha1542_test_port(int bse, struct Scsi_Host *shpnt)
- {
- unchar inquiry_cmd[] = {CMD_INQUIRY};
- unchar inquiry_result[4];
- unchar *cmdp;
- int len;
- volatile int debug = 0;
- /* Quick and dirty test for presence of the card. */
- if (inb(STATUS(bse)) == 0xff)
- return 0;
- /* Reset the adapter. I ought to make a hard reset, but it's not really necessary */
- /* DEB(printk("aha1542_test_port called n")); */
- /* In case some other card was probing here, reset interrupts */
- aha1542_intr_reset(bse); /* reset interrupts, so they don't block */
- outb(SRST | IRST /*|SCRST */ , CONTROL(bse));
- mdelay(20); /* Wait a little bit for things to settle down. */
- debug = 1;
- /* Expect INIT and IDLE, any of the others are bad */
- WAIT(STATUS(bse), STATMASK, INIT | IDLE, STST | DIAGF | INVDCMD | DF | CDF);
- debug = 2;
- /* Shouldn't have generated any interrupts during reset */
- if (inb(INTRFLAGS(bse)) & INTRMASK)
- goto fail;
- /* Perform a host adapter inquiry instead so we do not need to set
- up the mailboxes ahead of time */
- aha1542_out(bse, inquiry_cmd, 1);
- debug = 3;
- len = 4;
- cmdp = &inquiry_result[0];
- while (len--) {
- WAIT(STATUS(bse), DF, DF, 0);
- *cmdp++ = inb(DATA(bse));
- }
- debug = 8;
- /* Reading port should reset DF */
- if (inb(STATUS(bse)) & DF)
- goto fail;
- debug = 9;
- /* When HACC, command is completed, and we're though testing */
- WAIT(INTRFLAGS(bse), HACC, HACC, 0);
- /* now initialize adapter */
- debug = 10;
- /* Clear interrupts */
- outb(IRST, CONTROL(bse));
- debug = 11;
- return debug; /* 1 = ok */
- fail:
- return 0; /* 0 = not ok */
- }
- /* A quick wrapper for do_aha1542_intr_handle to grab the spin lock */
- static void do_aha1542_intr_handle(int irq, void *dev_id, struct pt_regs *regs)
- {
- unsigned long flags;
- spin_lock_irqsave(&io_request_lock, flags);
- aha1542_intr_handle(irq, dev_id, regs);
- spin_unlock_irqrestore(&io_request_lock, flags);
- }
- /* A "high" level interrupt handler */
- static void aha1542_intr_handle(int irq, void *dev_id, struct pt_regs *regs)
- {
- void (*my_done) (Scsi_Cmnd *) = NULL;
- int errstatus, mbi, mbo, mbistatus;
- int number_serviced;
- unsigned long flags;
- struct Scsi_Host *shost;
- Scsi_Cmnd *SCtmp;
- int flag;
- int needs_restart;
- struct mailbox *mb;
- struct ccb *ccb;
- shost = aha_host[irq - 9];
- if (!shost)
- panic("Splunge!");
- mb = HOSTDATA(shost)->mb;
- ccb = HOSTDATA(shost)->ccb;
- #ifdef DEBUG
- {
- flag = inb(INTRFLAGS(shost->io_port));
- printk(KERN_DEBUG "aha1542_intr_handle: ");
- if (!(flag & ANYINTR))
- printk("no interrupt?");
- if (flag & MBIF)
- printk("MBIF ");
- if (flag & MBOA)
- printk("MBOF ");
- if (flag & HACC)
- printk("HACC ");
- if (flag & SCRD)
- printk("SCRD ");
- printk("status %02xn", inb(STATUS(shost->io_port)));
- };
- #endif
- number_serviced = 0;
- needs_restart = 0;
- while (1 == 1) {
- flag = inb(INTRFLAGS(shost->io_port));
- /* Check for unusual interrupts. If any of these happen, we should
- probably do something special, but for now just printing a message
- is sufficient. A SCSI reset detected is something that we really
- need to deal with in some way. */
- if (flag & ~MBIF) {
- if (flag & MBOA)
- printk("MBOF ");
- if (flag & HACC)
- printk("HACC ");
- if (flag & SCRD) {
- needs_restart = 1;
- printk("SCRD ");
- }
- }
- aha1542_intr_reset(shost->io_port);
- save_flags(flags);
- cli();
- mbi = HOSTDATA(shost)->aha1542_last_mbi_used + 1;
- if (mbi >= 2 * AHA1542_MAILBOXES)
- mbi = AHA1542_MAILBOXES;
- do {
- if (mb[mbi].status != 0)
- break;
- mbi++;
- if (mbi >= 2 * AHA1542_MAILBOXES)
- mbi = AHA1542_MAILBOXES;
- } while (mbi != HOSTDATA(shost)->aha1542_last_mbi_used);
- if (mb[mbi].status == 0) {
- restore_flags(flags);
- /* Hmm, no mail. Must have read it the last time around */
- if (!number_serviced && !needs_restart)
- printk(KERN_WARNING "aha1542.c: interrupt received, but no mail.n");
- /* We detected a reset. Restart all pending commands for
- devices that use the hard reset option */
- if (needs_restart)
- aha1542_restart(shost);
- return;
- };
- mbo = (scsi2int(mb[mbi].ccbptr) - (SCSI_PA(&ccb[0]))) / sizeof(struct ccb);
- mbistatus = mb[mbi].status;
- mb[mbi].status = 0;
- HOSTDATA(shost)->aha1542_last_mbi_used = mbi;
- restore_flags(flags);
- #ifdef DEBUG
- {
- if (ccb[mbo].tarstat | ccb[mbo].hastat)
- printk(KERN_DEBUG "aha1542_command: returning %x (status %d)n",
- ccb[mbo].tarstat + ((int) ccb[mbo].hastat << 16), mb[mbi].status);
- };
- #endif
- if (mbistatus == 3)
- continue; /* Aborted command not found */
- #ifdef DEBUG
- printk(KERN_DEBUG "...done %d %dn", mbo, mbi);
- #endif
- SCtmp = HOSTDATA(shost)->SCint[mbo];
- if (!SCtmp || !SCtmp->scsi_done) {
- printk(KERN_WARNING "aha1542_intr_handle: Unexpected interruptn");
- printk(KERN_WARNING "tarstat=%x, hastat=%x idlun=%x ccb#=%d n", ccb[mbo].tarstat,
- ccb[mbo].hastat, ccb[mbo].idlun, mbo);
- return;
- }
- my_done = SCtmp->scsi_done;
- if (SCtmp->host_scribble) {
- scsi_free(SCtmp->host_scribble, 512);
- SCtmp->host_scribble = 0;
- }
- /* Fetch the sense data, and tuck it away, in the required slot. The
- Adaptec automatically fetches it, and there is no guarantee that
- we will still have it in the cdb when we come back */
- if (ccb[mbo].tarstat == 2)
- memcpy(SCtmp->sense_buffer, &ccb[mbo].cdb[ccb[mbo].cdblen],
- sizeof(SCtmp->sense_buffer));
- /* is there mail :-) */
- /* more error checking left out here */
- if (mbistatus != 1)
- /* This is surely wrong, but I don't know what's right */
- errstatus = makecode(ccb[mbo].hastat, ccb[mbo].tarstat);
- else
- errstatus = 0;
- #ifdef DEBUG
- if (errstatus)
- printk(KERN_DEBUG "(aha1542 error:%x %x %x) ", errstatus,
- ccb[mbo].hastat, ccb[mbo].tarstat);
- #endif
- if (ccb[mbo].tarstat == 2) {
- #ifdef DEBUG
- int i;
- #endif
- DEB(printk("aha1542_intr_handle: sense:"));
- #ifdef DEBUG
- for (i = 0; i < 12; i++)
- printk("%02x ", ccb[mbo].cdb[ccb[mbo].cdblen + i]);
- printk("n");
- #endif
- /*
- DEB(printk("aha1542_intr_handle: buf:"));
- for (i = 0; i < bufflen; i++)
- printk("%02x ", ((unchar *)buff)[i]);
- printk("n");
- */
- }
- DEB(if (errstatus) printk("aha1542_intr_handle: returning %6xn", errstatus));
- SCtmp->result = errstatus;
- HOSTDATA(shost)->SCint[mbo] = NULL; /* This effectively frees up the mailbox slot, as
- far as queuecommand is concerned */
- my_done(SCtmp);
- number_serviced++;
- };
- }
- static int aha1542_queuecommand(Scsi_Cmnd * SCpnt, void (*done) (Scsi_Cmnd *))
- {
- unchar ahacmd = CMD_START_SCSI;
- unchar direction;
- unchar *cmd = (unchar *) SCpnt->cmnd;
- unchar target = SCpnt->target;
- unchar lun = SCpnt->lun;
- unsigned long flags;
- void *buff = SCpnt->request_buffer;
- int bufflen = SCpnt->request_bufflen;
- int mbo;
- struct mailbox *mb;
- struct ccb *ccb;
- DEB(int i);
- mb = HOSTDATA(SCpnt->host)->mb;
- ccb = HOSTDATA(SCpnt->host)->ccb;
- DEB(if (target > 1) {
- SCpnt->result = DID_TIME_OUT << 16;
- done(SCpnt); return 0;
- }
- );
- if (*cmd == REQUEST_SENSE) {
- /* Don't do the command - we have the sense data already */
- #if 0
- /* scsi_request_sense() provides a buffer of size 256,
- so there is no reason to expect equality */
- if (bufflen != sizeof(SCpnt->sense_buffer))
- printk(KERN_CRIT "aha1542: Wrong buffer length supplied "
- "for request sense (%d)n", bufflen);
- #endif
- SCpnt->result = 0;
- done(SCpnt);
- return 0;
- }
- #ifdef DEBUG
- if (*cmd == READ_10 || *cmd == WRITE_10)
- i = xscsi2int(cmd + 2);
- else if (*cmd == READ_6 || *cmd == WRITE_6)
- i = scsi2int(cmd + 2);
- else
- i = -1;
- if (done)
- printk(KERN_DEBUG "aha1542_queuecommand: dev %d cmd %02x pos %d len %d ", target, *cmd, i, bufflen);
- else
- printk(KERN_DEBUG "aha1542_command: dev %d cmd %02x pos %d len %d ", target, *cmd, i, bufflen);
- aha1542_stat();
- printk(KERN_DEBUG "aha1542_queuecommand: dumping scsi cmd:");
- for (i = 0; i < SCpnt->cmd_len; i++)
- printk("%02x ", cmd[i]);
- printk("n");
- if (*cmd == WRITE_10 || *cmd == WRITE_6)
- return 0; /* we are still testing, so *don't* write */
- #endif
- /* Use the outgoing mailboxes in a round-robin fashion, because this
- is how the host adapter will scan for them */
- save_flags(flags);
- cli();
- mbo = HOSTDATA(SCpnt->host)->aha1542_last_mbo_used + 1;
- if (mbo >= AHA1542_MAILBOXES)
- mbo = 0;
- do {
- if (mb[mbo].status == 0 && HOSTDATA(SCpnt->host)->SCint[mbo] == NULL)
- break;
- mbo++;
- if (mbo >= AHA1542_MAILBOXES)
- mbo = 0;
- } while (mbo != HOSTDATA(SCpnt->host)->aha1542_last_mbo_used);
- if (mb[mbo].status || HOSTDATA(SCpnt->host)->SCint[mbo])
- panic("Unable to find empty mailbox for aha1542.n");
- HOSTDATA(SCpnt->host)->SCint[mbo] = SCpnt; /* This will effectively prevent someone else from
- screwing with this cdb. */
- HOSTDATA(SCpnt->host)->aha1542_last_mbo_used = mbo;
- restore_flags(flags);
- #ifdef DEBUG
- printk(KERN_DEBUG "Sending command (%d %x)...", mbo, done);
- #endif
- any2scsi(mb[mbo].ccbptr, SCSI_PA(&ccb[mbo])); /* This gets trashed for some reason */
- memset(&ccb[mbo], 0, sizeof(struct ccb));
- ccb[mbo].cdblen = SCpnt->cmd_len;
- direction = 0;
- if (*cmd == READ_10 || *cmd == READ_6)
- direction = 8;
- else if (*cmd == WRITE_10 || *cmd == WRITE_6)
- direction = 16;
- memcpy(ccb[mbo].cdb, cmd, ccb[mbo].cdblen);
- if (SCpnt->use_sg) {
- struct scatterlist *sgpnt;
- struct chain *cptr;
- #ifdef DEBUG
- unsigned char *ptr;
- #endif
- int i;
- ccb[mbo].op = 2; /* SCSI Initiator Command w/scatter-gather */
- SCpnt->host_scribble = (unsigned char *) scsi_malloc(512);
- sgpnt = (struct scatterlist *) SCpnt->request_buffer;
- cptr = (struct chain *) SCpnt->host_scribble;
- if (cptr == NULL)
- panic("aha1542.c: unable to allocate DMA memoryn");
- for (i = 0; i < SCpnt->use_sg; i++) {
- if (sgpnt[i].length == 0 || SCpnt->use_sg > 16 ||
- (((int) sgpnt[i].address) & 1) || (sgpnt[i].length & 1)) {
- unsigned char *ptr;
- printk(KERN_CRIT "Bad segment list supplied to aha1542.c (%d, %d)n", SCpnt->use_sg, i);
- for (i = 0; i < SCpnt->use_sg; i++) {
- printk(KERN_CRIT "%d: %p %dn", i, sgpnt[i].address,
- sgpnt[i].length);
- };
- printk(KERN_CRIT "cptr %x: ", (unsigned int) cptr);
- ptr = (unsigned char *) &cptr[i];
- for (i = 0; i < 18; i++)
- printk("%02x ", ptr[i]);
- panic("Foooooooood fight!");
- };
- any2scsi(cptr[i].dataptr, SCSI_PA(sgpnt[i].address));
- if (SCSI_PA(sgpnt[i].address + sgpnt[i].length - 1) > ISA_DMA_THRESHOLD)
- BAD_SG_DMA(SCpnt, sgpnt, SCpnt->use_sg, i);
- any2scsi(cptr[i].datalen, sgpnt[i].length);
- };
- any2scsi(ccb[mbo].datalen, SCpnt->use_sg * sizeof(struct chain));
- any2scsi(ccb[mbo].dataptr, SCSI_PA(cptr));
- #ifdef DEBUG
- printk("cptr %x: ", cptr);
- ptr = (unsigned char *) cptr;
- for (i = 0; i < 18; i++)
- printk("%02x ", ptr[i]);
- #endif
- } else {
- ccb[mbo].op = 0; /* SCSI Initiator Command */
- SCpnt->host_scribble = NULL;
- any2scsi(ccb[mbo].datalen, bufflen);
- if (buff && SCSI_PA(buff + bufflen - 1) > ISA_DMA_THRESHOLD)
- BAD_DMA(buff, bufflen);
- any2scsi(ccb[mbo].dataptr, SCSI_PA(buff));
- };
- ccb[mbo].idlun = (target & 7) << 5 | direction | (lun & 7); /*SCSI Target Id */
- ccb[mbo].rsalen = 16;
- ccb[mbo].linkptr[0] = ccb[mbo].linkptr[1] = ccb[mbo].linkptr[2] = 0;
- ccb[mbo].commlinkid = 0;
- #ifdef DEBUG
- {
- int i;
- printk(KERN_DEBUG "aha1542_command: sending.. ");
- for (i = 0; i < sizeof(ccb[mbo]) - 10; i++)
- printk("%02x ", ((unchar *) & ccb[mbo])[i]);
- };
- #endif
- if (done) {
- DEB(printk("aha1542_queuecommand: now waiting for interrupt ");
- aha1542_stat());
- SCpnt->scsi_done = done;
- mb[mbo].status = 1;
- aha1542_out(SCpnt->host->io_port, &ahacmd, 1); /* start scsi command */
- DEB(aha1542_stat());
- } else
- printk("aha1542_queuecommand: done can't be NULLn");
- return 0;
- }
- static void internal_done(Scsi_Cmnd * SCpnt)
- {
- SCpnt->SCp.Status++;
- }
- static int aha1542_command(Scsi_Cmnd * SCpnt)
- {
- DEB(printk("aha1542_command: ..calling aha1542_queuecommandn"));
- aha1542_queuecommand(SCpnt, internal_done);
- SCpnt->SCp.Status = 0;
- while (!SCpnt->SCp.Status)
- barrier();
- return SCpnt->result;
- }
- /* Initialize mailboxes */
- static void setup_mailboxes(int bse, struct Scsi_Host *shpnt)
- {
- int i;
- struct mailbox *mb;
- struct ccb *ccb;
- unchar cmd[5] = { CMD_MBINIT, AHA1542_MAILBOXES, 0, 0, 0};
- mb = HOSTDATA(shpnt)->mb;
- ccb = HOSTDATA(shpnt)->ccb;
- for (i = 0; i < AHA1542_MAILBOXES; i++) {
- mb[i].status = mb[AHA1542_MAILBOXES + i].status = 0;
- any2scsi(mb[i].ccbptr, SCSI_PA(&ccb[i]));
- };
- aha1542_intr_reset(bse); /* reset interrupts, so they don't block */
- any2scsi((cmd + 2), SCSI_PA(mb));
- aha1542_out(bse, cmd, 5);
- WAIT(INTRFLAGS(bse), INTRMASK, HACC, 0);
- while (0) {
- fail:
- printk(KERN_ERR "aha1542_detect: failed setting up mailboxesn");
- }
- aha1542_intr_reset(bse);
- }
- static int __init aha1542_getconfig(int base_io, unsigned char *irq_level, unsigned char *dma_chan, unsigned char *scsi_id)
- {
- unchar inquiry_cmd[] = {CMD_RETCONF};
- unchar inquiry_result[3];
- int i;
- i = inb(STATUS(base_io));
- if (i & DF) {
- i = inb(DATA(base_io));
- };
- aha1542_out(base_io, inquiry_cmd, 1);
- aha1542_in(base_io, inquiry_result, 3);
- WAIT(INTRFLAGS(base_io), INTRMASK, HACC, 0);
- while (0) {
- fail:
- printk(KERN_ERR "aha1542_detect: query board settingsn");
- }
- aha1542_intr_reset(base_io);
- switch (inquiry_result[0]) {
- case 0x80:
- *dma_chan = 7;
- break;
- case 0x40:
- *dma_chan = 6;
- break;
- case 0x20:
- *dma_chan = 5;
- break;
- case 0x01:
- *dma_chan = 0;
- break;
- case 0:
- /* This means that the adapter, although Adaptec 1542 compatible, doesn't use a DMA channel.
- Currently only aware of the BusLogic BT-445S VL-Bus adapter which needs this. */
- *dma_chan = 0xFF;
- break;
- default:
- printk(KERN_ERR "Unable to determine Adaptec DMA priority. Disabling boardn");
- return -1;
- };
- switch (inquiry_result[1]) {
- case 0x40:
- *irq_level = 15;
- break;
- case 0x20:
- *irq_level = 14;
- break;
- case 0x8:
- *irq_level = 12;
- break;
- case 0x4:
- *irq_level = 11;
- break;
- case 0x2:
- *irq_level = 10;
- break;
- case 0x1:
- *irq_level = 9;
- break;
- default:
- printk(KERN_ERR "Unable to determine Adaptec IRQ level. Disabling boardn");
- return -1;
- };
- *scsi_id = inquiry_result[2] & 7;
- return 0;
- }
- /* This function should only be called for 1542C boards - we can detect
- the special firmware settings and unlock the board */
- static int __init aha1542_mbenable(int base)
- {
- static unchar mbenable_cmd[3];
- static unchar mbenable_result[2];
- int retval;
- retval = BIOS_TRANSLATION_6432;
- mbenable_cmd[0] = CMD_EXTBIOS;
- aha1542_out(base, mbenable_cmd, 1);
- if (aha1542_in1(base, mbenable_result, 2))
- return retval;
- WAITd(INTRFLAGS(base), INTRMASK, HACC, 0, 100);
- aha1542_intr_reset(base);
- if ((mbenable_result[0] & 0x08) || mbenable_result[1]) {
- mbenable_cmd[0] = CMD_MBENABLE;
- mbenable_cmd[1] = 0;
- mbenable_cmd[2] = mbenable_result[1];
- if ((mbenable_result[0] & 0x08) && (mbenable_result[1] & 0x03))
- retval = BIOS_TRANSLATION_25563;
- aha1542_out(base, mbenable_cmd, 3);
- WAIT(INTRFLAGS(base), INTRMASK, HACC, 0);
- };
- while (0) {
- fail:
- printk(KERN_ERR "aha1542_mbenable: Mailbox init failedn");
- }
- aha1542_intr_reset(base);
- return retval;
- }
- /* Query the board to find out if it is a 1542 or a 1740, or whatever. */
- static int __init aha1542_query(int base_io, int *transl)
- {
- unchar inquiry_cmd[] = {CMD_INQUIRY};
- unchar inquiry_result[4];
- int i;
- i = inb(STATUS(base_io));
- if (i & DF) {
- i = inb(DATA(base_io));
- };
- aha1542_out(base_io, inquiry_cmd, 1);
- aha1542_in(base_io, inquiry_result, 4);
- WAIT(INTRFLAGS(base_io), INTRMASK, HACC, 0);
- while (0) {
- fail:
- printk(KERN_ERR "aha1542_detect: query card typen");
- }
- aha1542_intr_reset(base_io);
- *transl = BIOS_TRANSLATION_6432; /* Default case */
- /* For an AHA1740 series board, we ignore the board since there is a
- hardware bug which can lead to wrong blocks being returned if the board
- is operating in the 1542 emulation mode. Since there is an extended mode
- driver, we simply ignore the board and let the 1740 driver pick it up.
- */
- if (inquiry_result[0] == 0x43) {
- printk(KERN_INFO "aha1542.c: Emulation mode not supported for AHA 174N hardware.n");
- return 1;
- };
- /* Always call this - boards that do not support extended bios translation
- will ignore the command, and we will set the proper default */
- *transl = aha1542_mbenable(base_io);
- return 0;
- }
- #ifndef MODULE
- static int setup_idx = 0;
- void __init aha1542_setup(char *str, int *ints)
- {
- const char *ahausage = "aha1542: usage: aha1542=<PORTBASE>[,<BUSON>,<BUSOFF>[,<DMASPEED>]]n";
- int setup_portbase;
- if (setup_idx >= MAXBOARDS) {
- printk(KERN_ERR "aha1542: aha1542_setup called too many times! Bad LILO params ?n");
- printk(KERN_ERR " Entryline 1: %sn", setup_str[0]);
- printk(KERN_ERR " Entryline 2: %sn", setup_str[1]);
- printk(KERN_ERR " This line: %sn", str);
- return;
- }
- if (ints[0] < 1 || ints[0] > 4) {
- printk(KERN_ERR "aha1542: %sn", str);
- printk(ahausage);
- printk(KERN_ERR "aha1542: Wrong parameters may cause system malfunction.. We try anyway..n");
- }
- setup_called[setup_idx] = ints[0];
- setup_str[setup_idx] = str;
- setup_portbase = ints[0] >= 1 ? ints[1] : 0; /* Preserve the default value.. */
- setup_buson[setup_idx] = ints[0] >= 2 ? ints[2] : 7;
- setup_busoff[setup_idx] = ints[0] >= 3 ? ints[3] : 5;
- if (ints[0] >= 4)
- {
- int atbt = -1;
- switch (ints[4]) {
- case 5:
- atbt = 0x00;
- break;
- case 6:
- atbt = 0x04;
- break;
- case 7:
- atbt = 0x01;
- break;
- case 8:
- atbt = 0x02;
- break;
- case 10:
- atbt = 0x03;
- break;
- default:
- printk(KERN_ERR "aha1542: %sn", str);
- printk(ahausage);
- printk(KERN_ERR "aha1542: Valid values for DMASPEED are 5-8, 10 MB/s. Using jumper defaults.n");
- break;
- }
- setup_dmaspeed[setup_idx] = atbt;
- }
- if (setup_portbase != 0)
- bases[setup_idx] = setup_portbase;
- ++setup_idx;
- }
- static int __init do_setup(char *str)
- {
- int ints[4];
- int count=setup_idx;
- get_options(str, sizeof(ints)/sizeof(int), ints);
- aha1542_setup(str,ints);
- return count<setup_idx;
- }
- __setup("aha1542=",do_setup);
- #endif
- /* return non-zero on detection */
- static int __init aha1542_detect(Scsi_Host_Template * tpnt)
- {
- unsigned char dma_chan;
- unsigned char irq_level;
- unsigned char scsi_id;
- unsigned long flags;
- unsigned int base_io;
- int trans;
- struct Scsi_Host *shpnt = NULL;
- int count = 0;
- int indx;
- DEB(printk("aha1542_detect: n"));
- tpnt->proc_name = "aha1542";
- #ifdef MODULE
- bases[0] = aha1542[0];
- setup_buson[0] = aha1542[1];
- setup_busoff[0] = aha1542[2];
- {
- int atbt = -1;
- switch (aha1542[3]) {
- case 5:
- atbt = 0x00;
- break;
- case 6:
- atbt = 0x04;
- break;
- case 7:
- atbt = 0x01;
- break;
- case 8:
- atbt = 0x02;
- break;
- case 10:
- atbt = 0x03;
- break;
- };
- setup_dmaspeed[0] = atbt;
- }
- #endif
- /*
- * Find MicroChannel cards (AHA1640)
- */
- #ifdef CONFIG_MCA
- if(MCA_bus) {
- int slot = 0;
- int pos = 0;
- for (indx = 0; (slot != MCA_NOTFOUND) &&
- (indx < sizeof(bases)/sizeof(bases[0])); indx++) {
- if (bases[indx])
- continue;
- /* Detect only AHA-1640 cards -- MCA ID 0F1F */
- slot = mca_find_unused_adapter(0x0f1f, slot);
- if (slot == MCA_NOTFOUND)
- break;
-
- /* Found one */
- pos = mca_read_stored_pos(slot, 3);
-
- /* Decode address */
- if (pos & 0x80) {
- if (pos & 0x02) {
- if (pos & 0x01)
- bases[indx] = 0x334;
- else
- bases[indx] = 0x234;
- } else {
- if (pos & 0x01)
- bases[indx] = 0x134;
- }
- } else {
- if (pos & 0x02) {
- if (pos & 0x01)
- bases[indx] = 0x330;
- else
- bases[indx] = 0x230;
- } else {
- if (pos & 0x01)
- bases[indx] = 0x130;
- }
- }
- /* No need to decode IRQ and Arb level -- those are
- * read off the card later.
- */
- printk(KERN_INFO "Found an AHA-1640 in MCA slot %d, I/O 0x%04xn", slot, bases[indx]);
- mca_set_adapter_name(slot, "Adapter AHA-1640");
- mca_set_adapter_procfn(slot, NULL, NULL);
- mca_mark_as_used(slot);
-
- /* Go on */
- slot++;
- }
-
- }
- #endif
- /*
- * Hunt for ISA Plug'n'Pray Adaptecs (AHA1535)
- */
-
- if(isapnp)
- {
- struct pci_dev *pdev = NULL;
- for(indx = 0; indx <sizeof(bases)/sizeof(bases[0]);indx++)
- {
- if(bases[indx])
- continue;
- pdev = isapnp_find_dev(NULL, ISAPNP_VENDOR('A', 'D', 'P'),
- ISAPNP_FUNCTION(0x1542), pdev);
- if(pdev==NULL)
- break;
- /*
- * Activate the PnP card
- */
-
- if(pdev->prepare(pdev)<0)
- continue;
-
- if(!(pdev->resource[0].flags&IORESOURCE_IO))
- continue;
-
- pdev->resource[0].flags|=IORESOURCE_AUTO;
- if(pdev->activate(pdev)<0)
- continue;
-
- bases[indx] = pdev->resource[0].start;
-
- /* The card can be queried for its DMA, we have
- the DMA set up that is enough */
-
- printk(KERN_INFO "ISAPnP found an AHA1535 at I/O 0x%03Xn", bases[indx]);
- }
- }
- for (indx = 0; indx < sizeof(bases) / sizeof(bases[0]); indx++)
- if (bases[indx] != 0 && !check_region(bases[indx], 4)) {
- shpnt = scsi_register(tpnt,
- sizeof(struct aha1542_hostdata));
- if(shpnt==NULL)
- continue;
- /* For now we do this - until kmalloc is more intelligent
- we are resigned to stupid hacks like this */
- if (SCSI_PA(shpnt) >= ISA_DMA_THRESHOLD) {
- printk(KERN_ERR "Invalid address for shpnt with 1542.n");
- goto unregister;
- }
- if (!aha1542_test_port(bases[indx], shpnt))
- goto unregister;
- base_io = bases[indx];
- /* Set the Bus on/off-times as not to ruin floppy performance */
- {
- unchar oncmd[] = {CMD_BUSON_TIME, 7};
- unchar offcmd[] = {CMD_BUSOFF_TIME, 5};
- if (setup_called[indx]) {
- oncmd[1] = setup_buson[indx];
- offcmd[1] = setup_busoff[indx];
- }
- aha1542_intr_reset(base_io);
- aha1542_out(base_io, oncmd, 2);
- WAIT(INTRFLAGS(base_io), INTRMASK, HACC, 0);
- aha1542_intr_reset(base_io);
- aha1542_out(base_io, offcmd, 2);
- WAIT(INTRFLAGS(base_io), INTRMASK, HACC, 0);
- if (setup_dmaspeed[indx] >= 0) {
- unchar dmacmd[] = {CMD_DMASPEED, 0};
- dmacmd[1] = setup_dmaspeed[indx];
- aha1542_intr_reset(base_io);
- aha1542_out(base_io, dmacmd, 2);
- WAIT(INTRFLAGS(base_io), INTRMASK, HACC, 0);
- }
- while (0) {
- fail:
- printk(KERN_ERR "aha1542_detect: setting bus on/off-time failedn");
- }
- aha1542_intr_reset(base_io);
- }
- if (aha1542_query(base_io, &trans))
- goto unregister;
- if (aha1542_getconfig(base_io, &irq_level, &dma_chan, &scsi_id) == -1)
- goto unregister;
- printk(KERN_INFO "Configuring Adaptec (SCSI-ID %d) at IO:%x, IRQ %d", scsi_id, base_io, irq_level);
- if (dma_chan != 0xFF)
- printk(", DMA priority %d", dma_chan);
- printk("n");
- DEB(aha1542_stat());
- setup_mailboxes(base_io, shpnt);
- DEB(aha1542_stat());
- DEB(printk("aha1542_detect: enable interrupt channel %dn", irq_level));
- save_flags(flags);
- cli();
- if (request_irq(irq_level, do_aha1542_intr_handle, 0, "aha1542", NULL)) {
- printk(KERN_ERR "Unable to allocate IRQ for adaptec controller.n");
- restore_flags(flags);
- goto unregister;
- }
- if (dma_chan != 0xFF) {
- if (request_dma(dma_chan, "aha1542")) {
- printk(KERN_ERR "Unable to allocate DMA channel for Adaptec.n");
- free_irq(irq_level, NULL);
- restore_flags(flags);
- goto unregister;
- }
- if (dma_chan == 0 || dma_chan >= 5) {
- set_dma_mode(dma_chan, DMA_MODE_CASCADE);
- enable_dma(dma_chan);
- }
- }
- aha_host[irq_level - 9] = shpnt;
- shpnt->this_id = scsi_id;
- shpnt->unique_id = base_io;
- shpnt->io_port = base_io;
- shpnt->n_io_port = 4; /* Number of bytes of I/O space used */
- shpnt->dma_channel = dma_chan;
- shpnt->irq = irq_level;
- HOSTDATA(shpnt)->bios_translation = trans;
- if (trans == BIOS_TRANSLATION_25563)
- printk(KERN_INFO "aha1542.c: Using extended bios translationn");
- HOSTDATA(shpnt)->aha1542_last_mbi_used = (2 * AHA1542_MAILBOXES - 1);
- HOSTDATA(shpnt)->aha1542_last_mbo_used = (AHA1542_MAILBOXES - 1);
- memset(HOSTDATA(shpnt)->SCint, 0, sizeof(HOSTDATA(shpnt)->SCint));
- restore_flags(flags);
- #if 0
- DEB(printk(" *** READ CAPACITY ***n"));
- {
- unchar buf[8];
- static unchar cmd[] = { READ_CAPACITY, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
- int i;
- for (i = 0; i < sizeof(buf); ++i)
- buf[i] = 0x87;
- for (i = 0; i < 2; ++i)
- if (!aha1542_command(i, cmd, buf, sizeof(buf))) {
- printk(KERN_DEBUG "aha_detect: LU %d sector_size %d device_size %dn",
- i, xscsi2int(buf + 4), xscsi2int(buf));
- }
- }
- DEB(printk(" *** NOW RUNNING MY OWN TEST *** n"));
- for (i = 0; i < 4; ++i) {
- unsigned char cmd[10];
- static buffer[512];
- cmd[0] = READ_10;
- cmd[1] = 0;
- xany2scsi(cmd + 2, i);
- cmd[6] = 0;
- cmd[7] = 0;
- cmd[8] = 1;
- cmd[9] = 0;
- aha1542_command(0, cmd, buffer, 512);
- }
- #endif
- request_region(bases[indx], 4, "aha1542"); /* Register the IO ports that we use */
- count++;
- continue;
- unregister:
- scsi_unregister(shpnt);
- continue;
- };
- return count;
- }
- static int aha1542_restart(struct Scsi_Host *shost)
- {
- int i;
- int count = 0;
- #if 0
- unchar ahacmd = CMD_START_SCSI;
- #endif
- for (i = 0; i < AHA1542_MAILBOXES; i++)
- if (HOSTDATA(shost)->SCint[i] &&
- !(HOSTDATA(shost)->SCint[i]->device->soft_reset)) {
- #if 0
- HOSTDATA(shost)->mb[i].status = 1; /* Indicate ready to restart... */
- #endif
- count++;
- }
- printk(KERN_DEBUG "Potential to restart %d stalled commands...n", count);
- #if 0
- /* start scsi command */
- if (count)
- aha1542_out(shost->io_port, &ahacmd, 1);
- #endif
- return 0;
- }
- static int aha1542_abort(Scsi_Cmnd * SCpnt)
- {
- /*
- * The abort command does not leave the device in a clean state where
- * it is available to be used again. Until this gets worked out, we
- * will leave it commented out.
- */
- printk(KERN_ERR "aha1542.c: Unable to abort command for target %dn",
- SCpnt->target);
- return FAILED;
- }
- /*
- * This is a device reset. This is handled by sending a special command
- * to the device.
- */
- static int aha1542_dev_reset(Scsi_Cmnd * SCpnt)
- {
- unsigned long flags;
- struct mailbox *mb;
- unchar target = SCpnt->target;
- unchar lun = SCpnt->lun;
- int mbo;
- struct ccb *ccb;
- unchar ahacmd = CMD_START_SCSI;
- ccb = HOSTDATA(SCpnt->host)->ccb;
- mb = HOSTDATA(SCpnt->host)->mb;
- save_flags(flags);
- cli();
- mbo = HOSTDATA(SCpnt->host)->aha1542_last_mbo_used + 1;
- if (mbo >= AHA1542_MAILBOXES)
- mbo = 0;
- do {
- if (mb[mbo].status == 0 && HOSTDATA(SCpnt->host)->SCint[mbo] == NULL)
- break;
- mbo++;
- if (mbo >= AHA1542_MAILBOXES)
- mbo = 0;
- } while (mbo != HOSTDATA(SCpnt->host)->aha1542_last_mbo_used);
- if (mb[mbo].status || HOSTDATA(SCpnt->host)->SCint[mbo])
- panic("Unable to find empty mailbox for aha1542.n");
- HOSTDATA(SCpnt->host)->SCint[mbo] = SCpnt; /* This will effectively
- prevent someone else from
- screwing with this cdb. */
- HOSTDATA(SCpnt->host)->aha1542_last_mbo_used = mbo;
- restore_flags(flags);
- any2scsi(mb[mbo].ccbptr, SCSI_PA(&ccb[mbo])); /* This gets trashed for some reason */
- memset(&ccb[mbo], 0, sizeof(struct ccb));
- ccb[mbo].op = 0x81; /* BUS DEVICE RESET */
- ccb[mbo].idlun = (target & 7) << 5 | (lun & 7); /*SCSI Target Id */
- ccb[mbo].linkptr[0] = ccb[mbo].linkptr[1] = ccb[mbo].linkptr[2] = 0;
- ccb[mbo].commlinkid = 0;
- /*
- * Now tell the 1542 to flush all pending commands for this
- * target
- */
- aha1542_out(SCpnt->host->io_port, &ahacmd, 1);
- printk(KERN_WARNING "aha1542.c: Trying device reset for target %dn", SCpnt->target);
- return SUCCESS;
- #ifdef ERIC_neverdef
- /*
- * With the 1542 we apparently never get an interrupt to
- * acknowledge a device reset being sent. Then again, Leonard
- * says we are doing this wrong in the first place...
- *
- * Take a wait and see attitude. If we get spurious interrupts,
- * then the device reset is doing something sane and useful, and
- * we will wait for the interrupt to post completion.
- */
- printk(KERN_WARNING "Sent BUS DEVICE RESET to target %dn", SCpnt->target);
- /*
- * Free the command block for all commands running on this
- * target...
- */
- for (i = 0; i < AHA1542_MAILBOXES; i++) {
- if (HOSTDATA(SCpnt->host)->SCint[i] &&
- HOSTDATA(SCpnt->host)->SCint[i]->target == SCpnt->target) {
- Scsi_Cmnd *SCtmp;
- SCtmp = HOSTDATA(SCpnt->host)->SCint[i];
- if (SCtmp->host_scribble) {
- scsi_free(SCtmp->host_scribble, 512);
- SCtmp->host_scribble = NULL;
- }
- HOSTDATA(SCpnt->host)->SCint[i] = NULL;
- HOSTDATA(SCpnt->host)->mb[i].status = 0;
- }
- }
- return SUCCESS;
- return FAILED;
- #endif /* ERIC_neverdef */
- }
- static int aha1542_bus_reset(Scsi_Cmnd * SCpnt)
- {
- int i;
- /*
- * This does a scsi reset for all devices on the bus.
- * In principle, we could also reset the 1542 - should
- * we do this? Try this first, and we can add that later
- * if it turns out to be useful.
- */
- outb(SCRST, CONTROL(SCpnt->host->io_port));
- /*
- * Wait for the thing to settle down a bit. Unfortunately
- * this is going to basically lock up the machine while we
- * wait for this to complete. To be 100% correct, we need to
- * check for timeout, and if we are doing something like this
- * we are pretty desperate anyways.
- */
- spin_unlock_irq(&io_request_lock);
- scsi_sleep(4 * HZ);
- spin_lock_irq(&io_request_lock);
- WAIT(STATUS(SCpnt->host->io_port),
- STATMASK, INIT | IDLE, STST | DIAGF | INVDCMD | DF | CDF);
- /*
- * Now try to pick up the pieces. For all pending commands,
- * free any internal data structures, and basically clear things
- * out. We do not try and restart any commands or anything -
- * the strategy handler takes care of that crap.
- */
- printk(KERN_WARNING "Sent BUS RESET to scsi host %dn", SCpnt->host->host_no);
- for (i = 0; i < AHA1542_MAILBOXES; i++) {
- if (HOSTDATA(SCpnt->host)->SCint[i] != NULL) {
- Scsi_Cmnd *SCtmp;
- SCtmp = HOSTDATA(SCpnt->host)->SCint[i];
- if (SCtmp->device->soft_reset) {
- /*
- * If this device implements the soft reset option,
- * then it is still holding onto the command, and
- * may yet complete it. In this case, we don't
- * flush the data.
- */
- continue;
- }
- if (SCtmp->host_scribble) {
- scsi_free(SCtmp->host_scribble, 512);
- SCtmp->host_scribble = NULL;
- }
- HOSTDATA(SCpnt->host)->SCint[i] = NULL;
- HOSTDATA(SCpnt->host)->mb[i].status = 0;
- }
- }
- return SUCCESS;
- fail:
- return FAILED;
- }
- static int aha1542_host_reset(Scsi_Cmnd * SCpnt)
- {
- int i;
- /*
- * This does a scsi reset for all devices on the bus.
- * In principle, we could also reset the 1542 - should
- * we do this? Try this first, and we can add that later
- * if it turns out to be useful.
- */
- outb(HRST | SCRST, CONTROL(SCpnt->host->io_port));
- /*
- * Wait for the thing to settle down a bit. Unfortunately
- * this is going to basically lock up the machine while we
- * wait for this to complete. To be 100% correct, we need to
- * check for timeout, and if we are doing something like this
- * we are pretty desperate anyways.
- */
- spin_unlock_irq(&io_request_lock);
- scsi_sleep(4 * HZ);
- spin_lock_irq(&io_request_lock);
- WAIT(STATUS(SCpnt->host->io_port),
- STATMASK, INIT | IDLE, STST | DIAGF | INVDCMD | DF | CDF);
- /*
- * We need to do this too before the 1542 can interact with
- * us again.
- */
- setup_mailboxes(SCpnt->host->io_port, SCpnt->host);
- /*
- * Now try to pick up the pieces. For all pending commands,
- * free any internal data structures, and basically clear things
- * out. We do not try and restart any commands or anything -
- * the strategy handler takes care of that crap.
- */
- printk(KERN_WARNING "Sent BUS RESET to scsi host %dn", SCpnt->host->host_no);
- for (i = 0; i < AHA1542_MAILBOXES; i++) {
- if (HOSTDATA(SCpnt->host)->SCint[i] != NULL) {
- Scsi_Cmnd *SCtmp;
- SCtmp = HOSTDATA(SCpnt->host)->SCint[i];
- if (SCtmp->device->soft_reset) {
- /*
- * If this device implements the soft reset option,
- * then it is still holding onto the command, and
- * may yet complete it. In this case, we don't
- * flush the data.
- */
- continue;
- }
- if (SCtmp->host_scribble) {
- scsi_free(SCtmp->host_scribble, 512);
- SCtmp->host_scribble = NULL;
- }
- HOSTDATA(SCpnt->host)->SCint[i] = NULL;
- HOSTDATA(SCpnt->host)->mb[i].status = 0;
- }
- }
- return SUCCESS;
- fail:
- return FAILED;
- }
- /*
- * These are the old error handling routines. They are only temporarily
- * here while we play with the new error handling code.
- */
- static int aha1542_old_abort(Scsi_Cmnd * SCpnt)
- {
- #if 0
- unchar ahacmd = CMD_START_SCSI;
- unsigned long flags;
- struct mailbox *mb;
- int mbi, mbo, i;
- printk(KERN_DEBUG "In aha1542_abort: %x %xn",
- inb(STATUS(SCpnt->host->io_port)),
- inb(INTRFLAGS(SCpnt->host->io_port)));
- save_flags(flags);
- cli();
- mb = HOSTDATA(SCpnt->host)->mb;
- mbi = HOSTDATA(SCpnt->host)->aha1542_last_mbi_used + 1;
- if (mbi >= 2 * AHA1542_MAILBOXES)
- mbi = AHA1542_MAILBOXES;
- do {
- if (mb[mbi].status != 0)
- break;
- mbi++;
- if (mbi >= 2 * AHA1542_MAILBOXES)
- mbi = AHA1542_MAILBOXES;
- } while (mbi != HOSTDATA(SCpnt->host)->aha1542_last_mbi_used);
- restore_flags(flags);
- if (mb[mbi].status) {
- printk(KERN_ERR "Lost interrupt discovered on irq %d - attempting to recovern",
- SCpnt->host->irq);
- aha1542_intr_handle(SCpnt->host->irq, NULL);
- return 0;
- }
- /* OK, no lost interrupt. Try looking to see how many pending commands
- we think we have. */
- for (i = 0; i < AHA1542_MAILBOXES; i++)
- if (HOSTDATA(SCpnt->host)->SCint[i]) {
- if (HOSTDATA(SCpnt->host)->SCint[i] == SCpnt) {
- printk(KERN_ERR "Timed out command pending for %sn",
- kdevname(SCpnt->request.rq_dev));
- if (HOSTDATA(SCpnt->host)->mb[i].status) {
- printk(KERN_ERR "OGMB still full - restartingn");
- aha1542_out(SCpnt->host->io_port, &ahacmd, 1);
- };
- } else
- printk(KERN_ERR "Other pending command %sn",
- kdevname(SCpnt->request.rq_dev));
- }
- #endif
- DEB(printk("aha1542_abortn"));
- #if 0
- save_flags(flags);
- cli();
- for (mbo = 0; mbo < AHA1542_MAILBOXES; mbo++)
- if (SCpnt == HOSTDATA(SCpnt->host)->SCint[mbo]) {
- mb[mbo].status = 2; /* Abort command */
- aha1542_out(SCpnt->host->io_port, &ahacmd, 1); /* start scsi command */
- restore_flags(flags);
- break;
- };
- #endif
- return SCSI_ABORT_SNOOZE;
- }
- /* We do not implement a reset function here, but the upper level code
- assumes that it will get some kind of response for the command in
- SCpnt. We must oblige, or the command will hang the scsi system.
- For a first go, we assume that the 1542 notifies us with all of the
- pending commands (it does implement soft reset, after all). */
- static int aha1542_old_reset(Scsi_Cmnd * SCpnt, unsigned int reset_flags)
- {
- unchar ahacmd = CMD_START_SCSI;
- int i;
- /*
- * See if a bus reset was suggested.
- */
- if (reset_flags & SCSI_RESET_SUGGEST_BUS_RESET) {
- /*
- * This does a scsi reset for all devices on the bus.
- * In principle, we could also reset the 1542 - should
- * we do this? Try this first, and we can add that later
- * if it turns out to be useful.
- */
- outb(HRST | SCRST, CONTROL(SCpnt->host->io_port));
- /*
- * Wait for the thing to settle down a bit. Unfortunately
- * this is going to basically lock up the machine while we
- * wait for this to complete. To be 100% correct, we need to
- * check for timeout, and if we are doing something like this
- * we are pretty desperate anyways.
- */
- WAIT(STATUS(SCpnt->host->io_port),
- STATMASK, INIT | IDLE, STST | DIAGF | INVDCMD | DF | CDF);
- /*
- * We need to do this too before the 1542 can interact with
- * us again.
- */
- setup_mailboxes(SCpnt->host->io_port, SCpnt->host);
- /*
- * Now try to pick up the pieces. Restart all commands
- * that are currently active on the bus, and reset all of
- * the datastructures. We have some time to kill while
- * things settle down, so print a nice message.
- */
- printk(KERN_WARNING "Sent BUS RESET to scsi host %dn", SCpnt->host->host_no);
- for (i = 0; i < AHA1542_MAILBOXES; i++)
- if (HOSTDATA(SCpnt->host)->SCint[i] != NULL) {
- Scsi_Cmnd *SCtmp;
- SCtmp = HOSTDATA(SCpnt->host)->SCint[i];
- SCtmp->result = DID_RESET << 16;
- if (SCtmp->host_scribble) {
- scsi_free(SCtmp->host_scribble, 512);
- SCtmp->host_scribble = NULL;
- }
- printk(KERN_WARNING "Sending DID_RESET for target %dn", SCpnt->target);
- SCtmp->scsi_done(SCpnt);
- HOSTDATA(SCpnt->host)->SCint[i] = NULL;
- HOSTDATA(SCpnt->host)->mb[i].status = 0;
- }
- /*
- * Now tell the mid-level code what we did here. Since
- * we have restarted all of the outstanding commands,
- * then report SUCCESS.
- */
- return (SCSI_RESET_SUCCESS | SCSI_RESET_BUS_RESET);
- fail:
- printk(KERN_CRIT "aha1542.c: Unable to perform hard reset.n");
- printk(KERN_CRIT "Power cycle machine to resetn");
- return (SCSI_RESET_ERROR | SCSI_RESET_BUS_RESET);
- } else {
- /* This does a selective reset of just the one device */
- /* First locate the ccb for this command */
- for (i = 0; i < AHA1542_MAILBOXES; i++)
- if (HOSTDATA(SCpnt->host)->SCint[i] == SCpnt) {
- HOSTDATA(SCpnt->host)->ccb[i].op = 0x81; /* BUS DEVICE RESET */
- /* Now tell the 1542 to flush all pending commands for this target */
- aha1542_out(SCpnt->host->io_port, &ahacmd, 1);
- /* Here is the tricky part. What to do next. Do we get an interrupt
- for the commands that we aborted with the specified target, or
- do we generate this on our own? Try it without first and see
- what happens */
- printk(KERN_WARNING "Sent BUS DEVICE RESET to target %dn", SCpnt->target);
- /* If the first does not work, then try the second. I think the
- first option is more likely to be correct. Free the command
- block for all commands running on this target... */
- for (i = 0; i < AHA1542_MAILBOXES; i++)
- if (HOSTDATA(SCpnt->host)->SCint[i] &&
- HOSTDATA(SCpnt->host)->SCint[i]->target == SCpnt->target) {
- Scsi_Cmnd *SCtmp;
- SCtmp = HOSTDATA(SCpnt->host)->SCint[i];
- SCtmp->result = DID_RESET << 16;
- if (SCtmp->host_scribble) {
- scsi_free(SCtmp->host_scribble, 512);
- SCtmp->host_scribble = NULL;
- }
- printk(KERN_WARNING "Sending DID_RESET for target %dn", SCpnt->target);
- SCtmp->scsi_done(SCpnt);
- HOSTDATA(SCpnt->host)->SCint[i] = NULL;
- HOSTDATA(SCpnt->host)->mb[i].status = 0;
- }
- return SCSI_RESET_SUCCESS;
- }
- }
- /* No active command at this time, so this means that each time we got
- some kind of response the last time through. Tell the mid-level code
- to request sense information in order to decide what to do next. */
- return SCSI_RESET_PUNT;
- }
- #include "sd.h"
- static int aha1542_biosparam(Scsi_Disk * disk, kdev_t dev, int *ip)
- {
- int translation_algorithm;
- int size = disk->capacity;
- translation_algorithm = HOSTDATA(disk->device->host)->bios_translation;
- if ((size >> 11) > 1024 && translation_algorithm == BIOS_TRANSLATION_25563) {
- /* Please verify that this is the same as what DOS returns */
- ip[0] = 255;
- ip[1] = 63;
- ip[2] = size / 255 / 63;
- } else {
- ip[0] = 64;
- ip[1] = 32;
- ip[2] = size >> 11;
- }
- return 0;
- }
- MODULE_LICENSE("GPL");
- /* Eventually this will go into an include file, but this will be later */
- static Scsi_Host_Template driver_template = AHA1542;
- #include "scsi_module.c"