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 != SCSI_SENSE_BUFFERSIZE)
- printk(KERN_CRIT "aha1542: Wrong buffer length supplied "
- "for request sense (%d)\n", bufflen);
-#endif
SCpnt->result = 0;
done(SCpnt);
return 0;
{
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;
}
"Trying device reset for target\n");
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 %d\n", 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];
- kfree(SCtmp->host_scribble);
- 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)
return FAILED;
}
-#if 0
-/*
- * 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 %x\n",
- inb(STATUS(SCpnt->host->io_port)),
- inb(INTRFLAGS(SCpnt->host->io_port)));
-
- spin_lock_irqsave(&aha1542_lock, flags);
- 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);
- spin_unlock_irqrestore(&aha1542_lock, flags);
-
- if (mb[mbi].status) {
- printk(KERN_ERR "Lost interrupt discovered on irq %d - attempting to recover\n",
- SCpnt->host->irq);
- aha1542_intr_handle(SCpnt->host, 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 %s\n",
- SCpnt->request->rq_disk ?
- SCpnt->request->rq_disk->disk_name : "?"
- );
- if (HOSTDATA(SCpnt->host)->mb[i].status) {
- printk(KERN_ERR "OGMB still full - restarting\n");
- aha1542_out(SCpnt->host->io_port, &ahacmd, 1);
- };
- } else
- printk(KERN_ERR "Other pending command %s\n",
- SCpnt->request->rq_disk ?
- SCpnt->request->rq_disk->disk_name : "?"
- );
- }
-#endif
-
- DEB(printk("aha1542_abort\n"));
-#if 0
- spin_lock_irqsave(&aha1542_lock, flags);
- 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 */
- spin_unlock_irqrestore(&aha1542_lock, flags);
- break;
- }
- }
- if (AHA1542_MAILBOXES == mbo)
- spin_unlock_irqrestore(&aha1542_lock, flags);
-#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 %d\n", 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;
- kfree(SCtmp->host_scribble);
- SCtmp->host_scribble = NULL;
- printk(KERN_WARNING "Sending DID_RESET for target %d\n", 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 reset\n");
- 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 %d\n", 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;
- kfree(SCtmp->host_scribble);
- SCtmp->host_scribble = NULL;
- printk(KERN_WARNING "Sending DID_RESET for target %d\n", 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;
-}
-#endif /* end of big comment block around old_abort + old_reset */
-
static int aha1542_biosparam(struct scsi_device *sdev,
struct block_device *bdev, sector_t capacity, int *ip)
{
projects / platform / kernel / linux-rpi.git / commitdiff