/* $Id$ * 1993/03/31 * linux/kernel/aha1740.c * * Based loosely on aha1542.c which is * Copyright (C) 1992 Tommy Thorn and * Modified by Eric Youngdale * * This file is aha1740.c, written and * Copyright (C) 1992,1993 Brad McLean * brad@saturn.gaylord.com or brad@bradpc.gaylord.com. * * Modifications to makecode and queuecommand * for proper handling of multiple devices courteously * provided by Michael Weller, March, 1993 * * Multiple adapter support, extended translation detection, * update to current scsi subsystem changes, proc fs support, * working (!) module support based on patches from Andreas Arens, * by Andreas Degert <ad@papyrus.hamburg.com>, 2/1997 * * aha1740_makecode may still need even more work * if it doesn't work for your devices, take a look. * * Reworked for new_eh and new locking by Alan Cox <alan@lxorguk.ukuu.org.uk> * * Converted to EISA and generic DMA APIs by Marc Zyngier * <maz@wild-wind.fr.eu.org>, 4/2003. * * Shared interrupt support added by Rask Ingemann Lambertsen * <rask@sygehus.dk>, 10/2003 * * For the avoidance of doubt the "preferred form" of this code is one which * is in an open non patent encumbered format. Where cryptographic key signing * forms part of the process of creating an executable the information * including keys needed to generate an equivalently functional executable * are deemed to be part of the source code.
*/
/* IF YOU ARE HAVING PROBLEMS WITH THIS DRIVER, AND WANT TO WATCH IT WORK, THEN: #define DEBUG
*/ #ifdef DEBUG #define DEB(x) x #else #define DEB(x) #endif
staticint aha1740_makecode(unchar *sense, unchar *status)
{ struct statusword
{
ushort don:1, /* Command Done - No Error */
du:1, /* Data underrun */
:1, qf:1, /* Queue full */
sc:1, /* Specification Check */
dor:1, /* Data overrun */
ch:1, /* Chaining Halted */
intr:1, /* Interrupt issued */
asa:1, /* Additional Status Available */
sns:1, /* Sense information Stored */
:1, ini:1, /* Initialization Required */
me:1, /* Major error or exception */
:1, eca:1, /* Extended Contingent alliance */
:1;
} status_word; int retval = DID_OK;
status_word = * (struct statusword *) status; #ifdef DEBUG
printk("makecode from %x,%x,%x,%x %x,%x,%x,%x",
status[0], status[1], status[2], status[3],
sense[0], sense[1], sense[2], sense[3]); #endif if (!status_word.don) { /* Anything abnormal was detected */ if ( (status[1]&0x18) || status_word.sc ) { /*Additional info available*/ /* Use the supplied info for further diagnostics */ switch ( status[2] ) { case 0x12: if ( status_word.dor )
retval=DID_ERROR; /* It's an Overrun */ /* If not overrun, assume underrun and
* ignore it! */ break; case 0x00: /* No info, assume no error, should
* not occur */ break; case 0x11: case 0x21:
retval=DID_TIME_OUT; break; case 0x0a:
retval=DID_BAD_TARGET; break; case 0x04: case 0x05:
retval=DID_ABORT; /* Either by this driver or the
* AHA1740 itself */ break; default:
retval=DID_ERROR; /* No further * diagnostics
* possible */
}
} else { /* Michael suggests, and Brad concurs: */ if ( status_word.qf ) {
retval = DID_TIME_OUT; /* forces a redo */ /* I think this specific one should
* not happen -Brad */
printk("aha1740.c: WARNING: AHA1740 queue overflow!\n");
} else if ( status[0]&0x60 ) { /* Didn't find a better error */
retval = DID_ERROR;
} /* In any other case return DID_OK so for example CONDITION_CHECKS make it through to the appropriate
device driver */
}
} /* Under all circumstances supply the target status -Michael */ return status[3] | retval << 16;
}
staticint aha1740_test_port(unsignedint base)
{ if ( inb(PORTADR(base)) & PORTADDR_ENH ) return 1; /* Okay, we're all set */
printk("aha174x: Board detected, but not in enhanced mode, so disabled it.\n"); return 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 ( (adapstat & G2INTST_MASK) == G2INTST_CCBERROR ) {
memcpy_and_pad(SCtmp->sense_buffer,
SCSI_SENSE_BUFFERSIZE,
ecbptr->sense, sizeof(ecbptr->sense),
0);
errstatus = aha1740_makecode(ecbptr->sense,ecbptr->status);
} else
errstatus = 0;
DEB(if (errstatus)
printk("aha1740_intr_handle: returning %6x\n",
errstatus));
SCtmp->result = errstatus;
my_done = ecbptr->done;
memset(ecbptr,0,sizeof(struct ecb)); if ( my_done )
my_done(SCtmp); break;
case G2INTST_HARDFAIL:
printk(KERN_ALERT "aha1740 hardware failure!\n");
panic("aha1740.c"); /* Goodbye */
case G2INTST_ASNEVENT:
printk("aha1740 asynchronous event: %02x %02x %02x %02x %02x\n",
adapstat,
inb(MBOXIN0(base)),
inb(MBOXIN1(base)),
inb(MBOXIN2(base)),
inb(MBOXIN3(base))); /* Say What? */ /* Host Ready -> Mailbox in complete */
outb(G2CNTRL_HRDY,G2CNTRL(base)); break;
case G2INTST_CMDGOOD: /* set immediate command success flag here: */ break;
case G2INTST_CMDERROR: /* Set immediate command failure flag here: */ break;
}
number_serviced++;
}
host->ecb[ecbno].sg = 1; /* SCSI Initiator Command
* w/scatter-gather*/
cptr = sgptr->sg_chain;
scsi_for_each_sg(SCpnt, sg, nseg, i) {
cptr[i].datalen = sg_dma_len (sg);
cptr[i].dataptr = sg_dma_address (sg);
}
host->ecb[ecbno].datalen = nseg * sizeof(struct aha1740_chain);
host->ecb[ecbno].dataptr = sg_dma; #ifdef DEBUG
printk("cptr %x: ",cptr);
ptr = (unsignedchar *) cptr; for(i=0;i<24;i++) printk("%02x ", ptr[i]); #endif
} else {
host->ecb[ecbno].datalen = 0;
host->ecb[ecbno].dataptr = 0;
}
host->ecb[ecbno].lun = SCpnt->device->lun;
host->ecb[ecbno].ses = 1; /* Suppress underrun errors */
host->ecb[ecbno].dir = direction;
host->ecb[ecbno].ars = 1; /* Yes, get the sense on an error */
host->ecb[ecbno].senselen = 12;
host->ecb[ecbno].senseptr = ecb_cpu_to_dma (SCpnt->device->host,
host->ecb[ecbno].sense);
host->ecb[ecbno].statusptr = ecb_cpu_to_dma (SCpnt->device->host,
host->ecb[ecbno].status);
host->ecb[ecbno].done = done;
host->ecb[ecbno].SCpnt = SCpnt; #ifdef DEBUG
{ int i;
printk("aha1740_command: sending.. "); for (i = 0; i < sizeof(host->ecb[ecbno]) - 10; i++)
printk("%02x ", ((unchar *)&host->ecb[ecbno])[i]);
}
printk("\n"); #endif if (done) { /* The Adaptec Spec says the card is so fast that the loops will only be executed once in the code below. Even if this was true with the fastest processors when the spec was written, it doesn't seem to be true with today's fast processors. We print a warning if the code is executed more often than LOOPCNT_WARN. If this happens, it should be investigated. If the count reaches LOOPCNT_MAX, we assume something is broken; since there is no way to return an error (the return value is ignored by the mid-level scsi layer) we have to panic (and maybe that's the best thing we
can do then anyhow). */
#define LOOPCNT_WARN 10 /* excessive mbxout wait -> syslog-msg */ #define LOOPCNT_MAX 1000000 /* mbxout deadlock -> panic() after ~ 2 sec. */ int loopcnt; unsignedint base = SCpnt->device->host->io_port;
DEB(printk("aha1740[%d] critical section\n",ecbno));
spin_lock_irqsave(SCpnt->device->host->host_lock, flags); for (loopcnt = 0; ; loopcnt++) { if (inb(G2STAT(base)) & G2STAT_MBXOUT) break; if (loopcnt == LOOPCNT_WARN) {
printk("aha1740[%d]_mbxout wait!\n",ecbno);
} if (loopcnt == LOOPCNT_MAX)
panic("aha1740.c: mbxout busy!\n");
}
outl (ecb_cpu_to_dma (SCpnt->device->host, host->ecb + ecbno),
MBOXOUT0(base)); for (loopcnt = 0; ; loopcnt++) { if (! (inb(G2STAT(base)) & G2STAT_BUSY)) break; if (loopcnt == LOOPCNT_WARN) {
printk("aha1740[%d]_attn wait!\n",ecbno);
} if (loopcnt == LOOPCNT_MAX)
panic("aha1740.c: attn wait failed!\n");
}
outb(ATTN_START | (target & 7), ATTN(base)); /* Start it up */
spin_unlock_irqrestore(SCpnt->device->host->host_lock, flags);
DEB(printk("aha1740[%d] request queued.\n",ecbno));
} else
printk(KERN_ALERT "aha1740_queuecommand: done can't be NULL\n"); return 0;
}
static DEF_SCSI_QCMD(aha1740_queuecommand)
/* Query the board for its irq_level and irq_type. Nothing else matters
in enhanced mode on an EISA bus. */
staticint aha1740_eh_abort_handler (struct scsi_cmnd *dummy)
{ /* * From Alan Cox : * The AHA1740 has firmware handled abort/reset handling. The "head in * sand" kernel code is correct for once 8) * * So we define a dummy handler just to keep the kernel SCSI code as * quiet as possible...
*/
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