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Handle both channels of Twin channeled devices. Respect the configuration

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values for syncronous negotiation.  The 284x series adaptors can now be
supported without the Bios being enabled.  If you disable the Bios on the
274x series adaptors, all configuration parameters revert to the default
since there is no way to retrieve them.
This commit is contained in:
Justin T. Gibbs 1994-12-31 19:31:56 +00:00
parent 58e4304e3d
commit 53a69701bc
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=5328
3 changed files with 849 additions and 480 deletions
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439
sys/i386/eisa/aic7770.c
View File

@ -1,7 +1,9 @@
/*
* Driver for the 27/284X series adaptec SCSI controllers written by
* Justin T. Gibbs. Much of this driver was taken from Julian Elischer's
* 1742 driver, so it bears his copyright.
* Driver for the 27/284X series adaptec SCSI controllers
* Copyright (c) 1994 Justin T. Gibbs.
* All rights reserved.
*
* Portions of this driver are based on the FreeBSD 1742 Driver:
*
* Written by Julian Elischer (julian@tfs.com)
* for TRW Financial Systems for use under the MACH(2.5) operating system.
@ -18,7 +20,7 @@
*
* commenced: Sun Sep 27 18:14:01 PDT 1992
*
* $Id: aic7770.c,v 1.6 1994/11/25 22:25:15 ats Exp $
* $Id: aic7770.c,v 1.7 1994/11/29 23:06:54 gibbs Exp $
*/
/*
* TODO:
@ -26,16 +28,12 @@
* Implement Target Mode
* Implement Tagged Queuing
* Add target reset capabilities
* Test the check SCSI sense code
* Write a message abort procedure for use in ahc_timeout
* Add support for the 294X series cards
*
* This driver is very stable, and seems to offer performance
* comprable to the 1742 FreeBSD driver. The only timeouts
* I have ever experienced were due to critical driver bugs
* where an abort wouldn't have helped me anyway. So I haven't
* written code to actually search the QINFIFO and/or kill an
* active command. Same goes for target reset.
* comprable to the 1742 FreeBSD driver. I have not experienced
* any timeouts since the timeout code was written, so in that
* sense, it is untested.
*/
#define AHC_SCB_MAX 16 /*
@ -453,6 +451,11 @@ ahc_registerdev(struct isa_device *id)
* be run without BIOS support installed
*/
/*
* 1 byte per target starting at this address for configuration values
*/
#define HA_TARG_SCRATCH 0xc20
/*
* The sequencer will stick the frist byte of any rejected message here so
* we can see what is getting thrown away.
@ -480,23 +483,27 @@ ahc_registerdev(struct isa_device *id)
* by the BIOS at boot time.
*/
#define HA_ARG_1 0xc4c
#define HA_ARG_2 0xc4d
#define HA_RETURN_1 0xc4c
#define HA_SIGSTATE 0xc4e
#define HA_NEEDSDTR 0xc4f
#define HA_SIGSTATE 0xc4d
#define HA_NEEDSDTR 0xc4e
#define HA_SCBCOUNT 0xc56
#define HA_FLAGS 0xc57
#define TWIN_BUS 0x01
#define WIDE_BUS 0x02
#define HA_ACTIVE 0xc58
#define HA_SCSICONF 0xc5a
#define INTDEF 0xc5c
#define HA_HOSTCONF 0xc5d
#define HA_SCBCOUNT 0xc56
#define ACTIVE_A 0xc57
#define MSG_ABORT 0x06
/*
* Since the sequencer can disable pausing in a critical section, we
* must loop until it actually stops.
* XXX Should add a timeout in here!!
* XXX Should add a timeout in here??
*/
#define PAUSE_SEQUENCER(ahc) \
outb(HCNTRL + ahc->baseport, REQ_PAUSE); \
@ -512,7 +519,7 @@ ahc_registerdev(struct isa_device *id)
*/
#define RESTART_SEQUENCER(ahc) \
do { \
outb( SEQCTL + ahc->baseport, SEQRESET ); \
outb( SEQCTL + ahc->baseport, SEQRESET|FASTMODE ); \
} while (inw(SEQADDR0 + ahc->baseport) != 0); \
\
UNPAUSE_SEQUENCER(ahc);
@ -570,13 +577,13 @@ struct scb {
struct scb *next; /* in free list */
struct scsi_xfer *xs; /* the scsi_xfer for this cmd */
int flags;
#define SCB_FREE 0x00
#define SCB_ACTIVE 0x01
#define SCB_ABORTED 0x02
#define SCB_IMMED 0x04
#define SCB_IMMED_FAIL 0x08
#define SCB_SENSE 0x10
int position; /* Position in scbarray */
#define SCB_FREE 0
#define SCB_ACTIVE 1
#define SCB_ABORTED 2
#define SCB_IMMED 4
#define SCB_IMMED_FAIL 8
#define SCB_SENSE 16
struct ahc_dma_seg ahc_dma[AHC_NSEG] __attribute__ ((packed));
struct scsi_sense sense_cmd; /* SCSI command block */
};
@ -592,6 +599,8 @@ struct ahc_data {
int vect;
struct scb *immed_ecb; /* an outstanding immediete command */
struct scsi_link sc_link;
struct scsi_link sc_link_b; /* Second bus for Twin channel cards */
u_short needsdtr; /* Targets we iniaitiate sync neg to */
int numscbs;
u_char maxscbs;
int unpause;
@ -804,18 +813,18 @@ void ahc_scsirate(scsirate, period, offset, unit, target )
if ((ahc_syncrates[i].period - period) >= 0) {
*scsirate = (ahc_syncrates[i].sxfr) | (offset & 0x0f);
#ifdef AHCDEBUG
printf("ahc%d: target %d synchronous at %sMb/s\n",
unit, target, ahc_syncrates[i].rate );
#ifdef AHCDEBUG
#endif /* AHCDEBUG */
return;
}
}
/* Default to asyncronous transfer */
*scsirate = 0;
#ifdef AHCDEBUG
printf("ahc%d: target %d using asyncronous transfers\n",
unit, target );
#ifdef AHCDEBUG
#endif /* AHCDEBUG */
}
@ -831,6 +840,8 @@ ahc_attach(dev)
int unit = dev->id_unit;
struct ahc_data *ahc = ahcdata[unit];
ahc_registerdev(dev);
/*
* fill in the prototype scsi_link.
*/
@ -839,23 +850,21 @@ ahc_attach(dev)
ahc->sc_link.adapter = &ahc_switch;
ahc->sc_link.device = &ahc_dev;
ahc->sc_link.flags = DEBUGLEVEL;
/*
* Here, we should really fill in up to two different sc_links,
* making use of the extra fields in the sc_link structure so
* we can know which channel any requests are for. Then its just
* a matter of doing a scsi_attachdevs to both instead of the one.
* This should be done when we get or write sequencer code that
* supports more than one channel. XXX
*/
ahc_registerdev(dev);
ahc->sc_link.fordriver = 0;
/*
* ask the adapter what subunits are present
*/
scsi_attachdevs(&(ahc->sc_link));
if(ahc->type == AHC_274T || ahc->type == AHC_284T) {
/* Configure the second scsi bus */
ahc->sc_link_b = ahc->sc_link;
ahc->sc_link_b.fordriver = (void *)0x0008;
printf("ahc%d: Probing Channel B\n", unit);
scsi_attachdevs(&(ahc->sc_link_b));
}
return 1;
}
@ -944,15 +953,21 @@ ahcintr(unit)
case NO_MATCH:
{
u_char active;
int target = (inb(SELID + port) >> 4) & 0x4;
int active_port = HA_ACTIVE + port;
int tcl = inb(SCBARRAY+1 + port);
int target = (tcl >> 4) & 0x0f;
printf("ahc%d: no active SCB for reconnecting "
"target %d - issuing ABORT\n",
unit, target);
active = inb(HA_SCBCOUNT + port);
DELAY(10000);
active = inb(ACTIVE_A + port);
active &= ~(0x01 << target);
outb(ACTIVE_A + port, active);
"target %d, channel %c - issuing ABORT\n",
unit, target, tcl & 0x07);
if( tcl & 0x88 ) {
/* Second channel stores its info
* in byte two of HA_ACTIVE
*/
active_port++;
}
active = inb(active_port);
active &= ~(0x01 << (target & 0x07));
outb(active_port, active);
outb(CLRSINT1 + port, CLRSELTIMEO);
RESTART_SEQUENCER(ahc);
break;
@ -966,7 +981,7 @@ ahcintr(unit)
*/
transfer = inb(HA_ARG_1 + port) << 2;
/* The bottom half of SCSIXFER*/
offset = inb(HA_ARG_2 + port);
offset = inb(ACCUM + port);
ahc_scsirate(&rate, transfer, offset, unit,
inb(SCSIID + port) >> 0x4);
outb(HA_RETURN_1 + port, rate);
@ -974,6 +989,7 @@ ahcintr(unit)
case BAD_STATUS:
{
int scb_index, saved_scb_index;
u_short seqaddr;
/* The sequencer will notify us when a command
* has an error that would be of interest to
@ -989,111 +1005,109 @@ ahcintr(unit)
"valid during seqint 0x%x scb(%d)\n",
unit, intstat, scb_index);
goto clear;
}
}
xs = scb->xs;
xs = scb->xs;
ahc_getscb(port, scb);
ahc_getscb(port, scb);
#ifdef AHCDEBUG
if(xs->sc_link->target == DEBUGTARG)
ahc_print_scb(scb);
if(xs->sc_link->target == DEBUGTARG)
ahc_print_scb(scb);
#endif
xs->status = scb->target_status;
xs->resid = ((scb->residual_data_count[2] << 16) |
(scb->residual_data_count[1] << 8) |
scb->residual_data_count[0]);
switch(scb->target_status){
case SCSI_OK:
printf("ahc%d: Interrupted for staus of "
"0???\n", unit);
break;
case SCSI_CHECK:
xs->status = scb->target_status;
xs->resid = ((scb->residual_data_count[2] << 16) |
(scb->residual_data_count[1] << 8) |
scb->residual_data_count[0]);
switch(scb->target_status){
case SCSI_OK:
printf("ahc%d: Interrupted for staus of"
" 0???\n", unit);
break;
case SCSI_CHECK:
#ifdef AHCDEBUG
printf("ahc%d: SCSI Check requested\n", unit);
printf("ahc%d: target %d, lun %d (%s%d) "
"requests Check Status\n", unit
,xs->sc_link->target
,xs->sc_link->lun
,xs->sc_link->device->name
,xs->sc_link->dev_unit);
#endif
/*Priliminary code for requesting Sense */
/* Enable at your own risk */
#if STILL_NEEDS_TESTING
if((xs->error == XS_NOERROR) &&
!(scb->flags & SCB_SENSE))
{
if((xs->error == XS_NOERROR) &&
!(scb->flags & SCB_SENSE)) {
struct ahc_dma_seg *sg = scb->ahc_dma;
struct scsi_sense *sc = &(scb->sense_cmd);
int scbsave[AHC_SCB_MAX], i;
int queued = inb(QINCNT + port);
u_char tcl = scb->target_channel_lun;
int i, active;
#ifdef AHCDEBUG
printf("SENDING SENSE.\n");
printf("ahc%d: target %d, lun %d "
"(%s%d) Sending Sense\n", unit
,xs->sc_link->target
,xs->sc_link->lun
,xs->sc_link->device->name
,xs->sc_link->dev_unit);
#endif
bzero(scb, SCB_SIZE);
scb->flags |= SCB_SENSE;
xs->error = XS_SENSE;
sc->op_code = REQUEST_SENSE;
sc->byte2 = xs->sc_link->lun << 5;
sc->length = sizeof(struct scsi_sense_data);
scb->cmdlen = sizeof(*sc);
scb->cmdpointer = KVTOPHYS(sc);
scb->SG_segment_count = 1;
scb->SG_list_pointer = KVTOPHYS(sg);
sc->control = 0;
sg->addr = KVTOPHYS(&xs->sense);
sg->len = sizeof(struct scsi_sense_data);
scb->target_channel_lun = tcl;
scb->SG_segment_count = 1;
scb->SG_list_pointer = KVTOPHYS(sg);
scb->cmdpointer = KVTOPHYS(sc);
scb->cmdlen = sizeof(*sc);
/*
* Reinsert us at head of
* queue
* Download new command.
*/
outb(SCBCNT + port, 0x80);
outsb(SCBARRAY + port, scb, SCB_SIZE);
outb(SCBCNT + port, 0);
for (i = 0; i < queued; i++)
scbsave[i] = inb(QINFIFO + port);
outb(QINFIFO + port, scb->position);
for (i = 0; i < queued; i++)
outb(QINFIFO + port, scbsave[i]);
/* New lease on life */
untimeout(ahc_timeout, (caddr_t)scb);
timeout(ahc_timeout, (caddr_t)scb,
(xs->timeout * hz) / 1000);
outb(SCBCNT + port, 0x80);
outsb(SCBARRAY + port, scb, SCB_SIZE);
outb(SCBCNT + port, 0);
goto clear;
}
#endif
xs->error = XS_DRIVER_STUFFUP;
break;
case SCSI_BUSY:
xs->error = XS_BUSY;
printf("ahc%d: Target Busy\n", unit);
break;
default:
#ifdef AHCDEBUG
if (ahc_debug & AHC_SHOWMISC)
{
printf("unexpected targ_status: %x\n",
scb->target_status);
}
#endif /*AHCDEBUG */
xs->error = XS_DRIVER_STUFFUP;
break;
}
untimeout(ahc_timeout, (caddr_t)scb);
ahc_done(unit, scb);
break;
}
default:
printf("ahc: seqint, "
"intstat = 0x%x, scsisigi = 0x%x\n",
}
/*
* Clear the SCB_SENSE Flag and have
* the sequencer do a normal command
* complete with either a "DRIVER_STUFFUP"
* error or whatever other error condition
* we already had.
*/
scb->flags &= ~SCB_SENSE;
if(xs->error == XS_NOERROR)
xs->error = XS_DRIVER_STUFFUP;
break;
case SCSI_BUSY:
xs->error = XS_BUSY;
printf("ahc%d: Target Busy\n", unit);
break;
default:
printf("unexpected targ_status: %x\n",
scb->target_status);
xs->error = XS_DRIVER_STUFFUP;
break;
}
seqaddr = inw(SEQADDR0 + port);
outw(SEQADDR0 + port, seqaddr + 1);
break;
}
default:
printf("ahc: seqint, "
"intstat == 0x%x, scsisigi = 0x%x\n",
intstat, inb(SCSISIGI + port));
break;
}
clear:
/*
* Clear the upper byte that holds SEQINT status
* codes and clear the SEQINT bit.
*/
clear:
outb(CLRINT + port, CLRSEQINT);
/*
@ -1111,7 +1125,7 @@ ahcintr(unit)
status = inb(SSTAT1 + port);
scb = ahc->scbarray[scb_index];
if (!scb || scb->flags != SCB_ACTIVE) {
if (!scb || !(scb->flags & SCB_ACTIVE)) {
printf("ahc%d: ahcintr - referenced scb not "
"valid during scsiint 0x%x scb(%d)\n",
unit, status, scb_index);
@ -1123,8 +1137,9 @@ ahcintr(unit)
}
xs = scb->xs;
if (status & SELTO) {
if (status & SELTO) {
u_char active;
int active_port = HA_ACTIVE + port;
outb(SCSISEQ + port, 0);
xs->error = XS_TIMEOUT;
/*
@ -1132,9 +1147,13 @@ ahcintr(unit)
* target, and mark the target as free
*/
outb(HA_MSG_FLAGS + port, 0);
active = inb(ACTIVE_A + port);
active &= ~(0x01 << xs->sc_link->target);
outb(ACTIVE_A + port, active);
if (scb->target_channel_lun & 0x88)
active_port++;
active = inb(active_port) &
~(0x01 << (xs->sc_link->target & 0x07));
outb(active_port, active);
outb(CLRSINT1 + port, CLRSELTIMEO);
RESTART_SEQUENCER(ahc);
@ -1191,8 +1210,9 @@ ahcintr(unit)
scb = ahc->scbarray[scb_index];
if (!scb || !(scb->flags & SCB_ACTIVE)) {
printf("ahc%d: WARNING "
"no command for scb %d (cmdcmplt)\n",
unit, scb_index);
"no command for scb %d (cmdcmplt)\n"
"QOUTCNT == %d\n",
unit, scb_index, inb(QOUTCNT + port));
outb(CLRINT + port, CLRCMDINT);
continue;
}
@ -1224,11 +1244,14 @@ ahc_done(unit, scb)
* Put the results of the operation
* into the xfer and call whoever started it
*/
if(scb->flags & SCB_SENSE)
xs->error = XS_SENSE;
if ((xs->flags & SCSI_ERR_OK) && !(xs->error == XS_SENSE)) {
/* All went correctly OR errors expected */
xs->error = 0;
}
xs->flags |= ITSDONE;
ahc_free_scb(unit, scb, xs->flags);
scsi_done(xs);
}
@ -1242,7 +1265,7 @@ ahc_init(unit)
{
struct ahc_data *ahc = ahcdata[unit];
int port = ahc->baseport;
int intdef;
int intdef, i;
/*
* Assume we have a board at this stage
@ -1274,15 +1297,18 @@ ahc_init(unit)
switch ( inb(SBLKCTL + port) ) {
case 0:
printf(" Single Channel, ");
outb(HA_FLAGS + port, 0);
break;
case 2:
printf(" Wide SCSI configuration - Unsupported\n");
ahc->type += 2;
outb(HA_FLAGS + port, WIDE_BUS);
return(-1);
break;
case 8:
printf(" Twin Channel - ignoring channel B, ");
printf(" Twin Channel, ");
ahc->type += 1;
outb(HA_FLAGS + port, TWIN_BUS);
break;
default:
printf(" Unsupported adapter type. Ignoring\n");
@ -1319,7 +1345,6 @@ ahc_init(unit)
printf("illegal irq setting\n");
return (EIO);
}
printf("int=%d, ", ahc->vect);
/* who are we on the scsi bus? */
ahc->our_id = (inb(HA_SCSICONF + port) & HSCSIID);
@ -1342,13 +1367,29 @@ ahc_init(unit)
outb(SCSISEQ + port, 0);
/*
* Attempt syncronous negotiation for all targets.
* Look at the information that board initialization or
* the board bios has left us. In the lower four bits of each
* target's scratch space any value other than 0 indicates
* that we should initiate syncronous transfers. If it's zero,
* the user or the BIOS has decided to disable syncronous
* negotiation to that target so we don't activate the needsdr
* flag.
*/
ahc->needsdtr = 0;
for(i = 0; i < 16; i++){
u_char target_settings = inb(HA_TARG_SCRATCH + i + port);
if(target_settings & 0x0f)
ahc->needsdtr |= (0x01 << i);
}
outw( HA_NEEDSDTR + port, ahc->needsdtr );
/*
* Clear the pending messages flag
*/
outb( HA_NEEDSDTR + port, 0xff );
outb( HA_MSG_FLAGS + port, 0);
outb(HA_SCBCOUNT + port, ahc->maxscbs);
outb( ACTIVE_A + port, 0 );
outb( HA_SCBCOUNT + port, ahc->maxscbs);
/* We don't have any busy targets right now */
outw( HA_ACTIVE + port, 0 );
UNPAUSE_SEQUENCER(ahc);
@ -1425,9 +1466,9 @@ ahc_scsi_cmd(xs)
* Put all the arguments for the xfer in the scb
*/
/* Note, Linux sequencer code does not support extra channels */
scb->target_channel_lun = ((xs->sc_link->target << 4) & 0xF0) |
xs->sc_link->lun & 0x7;
((u_long)xs->sc_link->fordriver & 0x08) |
xs->sc_link->lun & 0x07;
scb->cmdlen = xs->cmdlen;
scb->cmdpointer = KVTOPHYS(xs->cmd);
if (xs->datalen) { /* should use S/G only if not zero length */
@ -1564,9 +1605,9 @@ ahc_free_scb(unit, scb, flags)
if (!(flags & SCSI_NOMASK))
opri = splbio();
scb->flags = SCB_FREE;
scb->next = ahc->free_scb;
ahc->free_scb = scb;
scb->flags = SCB_FREE;
/*
* If there were none, wake abybody waiting for
* one to come free, starting with queued entries
@ -1643,7 +1684,7 @@ void ahc_loadseq(port)
int port;
{
static unsigned char seqprog[] = {
# include <gnu/misc/aic7770/aic7770_seq.h>
# include "aic7770_seq.h"
};
outb(SEQCTL + port, PERRORDIS|SEQRESET|LOADRAM);
@ -1681,6 +1722,103 @@ ahc_poll(int unit, int wait)
return (0);
}
void
ahc_abort_scb( unit, ahc, scb )
int unit;
struct ahc_data *ahc;
struct scb *scb;
{
int port = ahc->baseport;
int found = 0;
int active_scb;
PAUSE_SEQUENCER(ahc);
/*
* Case 1: In the QINFIFO
*/
{
int saved_queue[AHC_SCB_MAX];
int i;
int queued = inb(QINCNT + port);
for( i = 0; i < (queued - found); i++){
saved_queue[i] = inb(QINFIFO + port);
if( saved_queue[i] == scb->position ){
i--;
found = 1;
}
}
/* Re-insert entries back into the queue */
for( queued = 0; queued < i; queued++ )
outb(QINFIFO + port, saved_queue[queued]);
if( found ){
goto done;
}
}
active_scb = inb(SCBPTR + port);
/*
* Case 2: Not the active command
*/
if( active_scb != scb->position ){
/*
* Select the SCB we want to abort
* and turn off the disconnected bit.
* the driver will then abort the command
* and notify us of the abort.
*/
int scb_control;
outb(SCBPTR + port, scb->position);
scb_control = inb(SCBARRAY + port);
scb_control &= ~SCB_DIS;
outb(SCBARRAY + port, scb_control);
outb(SCBPTR + port, active_scb);
goto done;
}
/*
* Case 3: Currently active command
*/
if (inb(HA_MSG_FLAGS + port) & 0x80) {
/*
* If there's a message in progress,
* reset the bus and have all devices renegotiate.
*/
if(scb->target_channel_lun & 0x08){
outb(HA_NEEDSDTR + 1 + port, ahc->needsdtr >> 8);
outb(HA_ACTIVE + 1, 0);
}
else if (ahc->type == AHC_274W || ahc->type == AHC_284W){
outw(HA_NEEDSDTR, ahc->needsdtr);
outw(HA_ACTIVE, 0);
}
else{
outb(HA_NEEDSDTR + port, ahc->needsdtr & 0xff);
outb(HA_ACTIVE, 0);
}
outb(SCSISEQ + port, SCSIRSTO);
DELAY(50);
outb(SCSISEQ + port, 0);
goto done;
}
/*
* Otherwise, set up an abort message and have the sequencer
* clean up
*/
outb(HA_MSG_FLAGS + port, 0x80);
outb(HA_MSG_LEN + port, 1);
outb(HA_MSG_START + port, MSG_ABORT);
outb(SCSISIGO + port, inb(HA_SIGSTATE + port) | 0x10);
done:
scb->flags |= SCB_ABORTED;
UNPAUSE_SEQUENCER(ahc);
ahc_done(unit, scb);
return;
}
void
ahc_timeout(void *arg1)
{
@ -1691,18 +1829,15 @@ ahc_timeout(void *arg1)
unit = scb->xs->sc_link->adapter_unit;
ahc = ahcdata[unit];
port = ahc->baseport;
printf("ahc%d: target %d, lun %d (%s%d) timed out ", unit
,scb->xs->sc_link->target
,scb->xs->sc_link->lun
,scb->xs->sc_link->device->name
,scb->xs->sc_link->dev_unit);
#if 0
#ifdef AHCDEBUG
if (ahc_debug & AHC_SHOWMISC)
ahc_print_active_scb(unit);
#endif /*AHCDEBUG */
#endif
/*
* If it's immediate, don't try abort it
@ -1714,21 +1849,9 @@ ahc_timeout(void *arg1)
splx(s);
return;
}
/*
* If it has been through before, then
* a previous abort has failed, don't
* try abort again
*/
if (scb->flags == SCB_ABORTED) {
/*
* abort timed out
*/
printf("AGAIN");
scb->xs->retries = 0; /* I MEAN IT ! */
ahc_done(unit, scb);
} else { /* abort the operation that has timed out */
printf("Abort unsupported!!!\n");
}
/* abort the operation that has timed out */
printf("\n");
ahc_abort_scb( unit, ahc, scb );
splx(s);
}

439
sys/i386/isa/aic7770.c
View File

@ -1,7 +1,9 @@
/*
* Driver for the 27/284X series adaptec SCSI controllers written by
* Justin T. Gibbs. Much of this driver was taken from Julian Elischer's
* 1742 driver, so it bears his copyright.
* Driver for the 27/284X series adaptec SCSI controllers
* Copyright (c) 1994 Justin T. Gibbs.
* All rights reserved.
*
* Portions of this driver are based on the FreeBSD 1742 Driver:
*
* Written by Julian Elischer (julian@tfs.com)
* for TRW Financial Systems for use under the MACH(2.5) operating system.
@ -18,7 +20,7 @@
*
* commenced: Sun Sep 27 18:14:01 PDT 1992
*
* $Id: aic7770.c,v 1.6 1994/11/25 22:25:15 ats Exp $
* $Id: aic7770.c,v 1.7 1994/11/29 23:06:54 gibbs Exp $
*/
/*
* TODO:
@ -26,16 +28,12 @@
* Implement Target Mode
* Implement Tagged Queuing
* Add target reset capabilities
* Test the check SCSI sense code
* Write a message abort procedure for use in ahc_timeout
* Add support for the 294X series cards
*
* This driver is very stable, and seems to offer performance
* comprable to the 1742 FreeBSD driver. The only timeouts
* I have ever experienced were due to critical driver bugs
* where an abort wouldn't have helped me anyway. So I haven't
* written code to actually search the QINFIFO and/or kill an
* active command. Same goes for target reset.
* comprable to the 1742 FreeBSD driver. I have not experienced
* any timeouts since the timeout code was written, so in that
* sense, it is untested.
*/
#define AHC_SCB_MAX 16 /*
@ -453,6 +451,11 @@ ahc_registerdev(struct isa_device *id)
* be run without BIOS support installed
*/
/*
* 1 byte per target starting at this address for configuration values
*/
#define HA_TARG_SCRATCH 0xc20
/*
* The sequencer will stick the frist byte of any rejected message here so
* we can see what is getting thrown away.
@ -480,23 +483,27 @@ ahc_registerdev(struct isa_device *id)
* by the BIOS at boot time.
*/
#define HA_ARG_1 0xc4c
#define HA_ARG_2 0xc4d
#define HA_RETURN_1 0xc4c
#define HA_SIGSTATE 0xc4e
#define HA_NEEDSDTR 0xc4f
#define HA_SIGSTATE 0xc4d
#define HA_NEEDSDTR 0xc4e
#define HA_SCBCOUNT 0xc56
#define HA_FLAGS 0xc57
#define TWIN_BUS 0x01
#define WIDE_BUS 0x02
#define HA_ACTIVE 0xc58
#define HA_SCSICONF 0xc5a
#define INTDEF 0xc5c
#define HA_HOSTCONF 0xc5d
#define HA_SCBCOUNT 0xc56
#define ACTIVE_A 0xc57
#define MSG_ABORT 0x06
/*
* Since the sequencer can disable pausing in a critical section, we
* must loop until it actually stops.
* XXX Should add a timeout in here!!
* XXX Should add a timeout in here??
*/
#define PAUSE_SEQUENCER(ahc) \
outb(HCNTRL + ahc->baseport, REQ_PAUSE); \
@ -512,7 +519,7 @@ ahc_registerdev(struct isa_device *id)
*/
#define RESTART_SEQUENCER(ahc) \
do { \
outb( SEQCTL + ahc->baseport, SEQRESET ); \
outb( SEQCTL + ahc->baseport, SEQRESET|FASTMODE ); \
} while (inw(SEQADDR0 + ahc->baseport) != 0); \
\
UNPAUSE_SEQUENCER(ahc);
@ -570,13 +577,13 @@ struct scb {
struct scb *next; /* in free list */
struct scsi_xfer *xs; /* the scsi_xfer for this cmd */
int flags;
#define SCB_FREE 0x00
#define SCB_ACTIVE 0x01
#define SCB_ABORTED 0x02
#define SCB_IMMED 0x04
#define SCB_IMMED_FAIL 0x08
#define SCB_SENSE 0x10
int position; /* Position in scbarray */
#define SCB_FREE 0
#define SCB_ACTIVE 1
#define SCB_ABORTED 2
#define SCB_IMMED 4
#define SCB_IMMED_FAIL 8
#define SCB_SENSE 16
struct ahc_dma_seg ahc_dma[AHC_NSEG] __attribute__ ((packed));
struct scsi_sense sense_cmd; /* SCSI command block */
};
@ -592,6 +599,8 @@ struct ahc_data {
int vect;
struct scb *immed_ecb; /* an outstanding immediete command */
struct scsi_link sc_link;
struct scsi_link sc_link_b; /* Second bus for Twin channel cards */
u_short needsdtr; /* Targets we iniaitiate sync neg to */
int numscbs;
u_char maxscbs;
int unpause;
@ -804,18 +813,18 @@ void ahc_scsirate(scsirate, period, offset, unit, target )
if ((ahc_syncrates[i].period - period) >= 0) {
*scsirate = (ahc_syncrates[i].sxfr) | (offset & 0x0f);
#ifdef AHCDEBUG
printf("ahc%d: target %d synchronous at %sMb/s\n",
unit, target, ahc_syncrates[i].rate );
#ifdef AHCDEBUG
#endif /* AHCDEBUG */
return;
}
}
/* Default to asyncronous transfer */
*scsirate = 0;
#ifdef AHCDEBUG
printf("ahc%d: target %d using asyncronous transfers\n",
unit, target );
#ifdef AHCDEBUG
#endif /* AHCDEBUG */
}
@ -831,6 +840,8 @@ ahc_attach(dev)
int unit = dev->id_unit;
struct ahc_data *ahc = ahcdata[unit];
ahc_registerdev(dev);
/*
* fill in the prototype scsi_link.
*/
@ -839,23 +850,21 @@ ahc_attach(dev)
ahc->sc_link.adapter = &ahc_switch;
ahc->sc_link.device = &ahc_dev;
ahc->sc_link.flags = DEBUGLEVEL;
/*
* Here, we should really fill in up to two different sc_links,
* making use of the extra fields in the sc_link structure so
* we can know which channel any requests are for. Then its just
* a matter of doing a scsi_attachdevs to both instead of the one.
* This should be done when we get or write sequencer code that
* supports more than one channel. XXX
*/
ahc_registerdev(dev);
ahc->sc_link.fordriver = 0;
/*
* ask the adapter what subunits are present
*/
scsi_attachdevs(&(ahc->sc_link));
if(ahc->type == AHC_274T || ahc->type == AHC_284T) {
/* Configure the second scsi bus */
ahc->sc_link_b = ahc->sc_link;
ahc->sc_link_b.fordriver = (void *)0x0008;
printf("ahc%d: Probing Channel B\n", unit);
scsi_attachdevs(&(ahc->sc_link_b));
}
return 1;
}
@ -944,15 +953,21 @@ ahcintr(unit)
case NO_MATCH:
{
u_char active;
int target = (inb(SELID + port) >> 4) & 0x4;
int active_port = HA_ACTIVE + port;
int tcl = inb(SCBARRAY+1 + port);
int target = (tcl >> 4) & 0x0f;
printf("ahc%d: no active SCB for reconnecting "
"target %d - issuing ABORT\n",
unit, target);
active = inb(HA_SCBCOUNT + port);
DELAY(10000);
active = inb(ACTIVE_A + port);
active &= ~(0x01 << target);
outb(ACTIVE_A + port, active);
"target %d, channel %c - issuing ABORT\n",
unit, target, tcl & 0x07);
if( tcl & 0x88 ) {
/* Second channel stores its info
* in byte two of HA_ACTIVE
*/
active_port++;
}
active = inb(active_port);
active &= ~(0x01 << (target & 0x07));
outb(active_port, active);
outb(CLRSINT1 + port, CLRSELTIMEO);
RESTART_SEQUENCER(ahc);
break;
@ -966,7 +981,7 @@ ahcintr(unit)
*/
transfer = inb(HA_ARG_1 + port) << 2;
/* The bottom half of SCSIXFER*/
offset = inb(HA_ARG_2 + port);
offset = inb(ACCUM + port);
ahc_scsirate(&rate, transfer, offset, unit,
inb(SCSIID + port) >> 0x4);
outb(HA_RETURN_1 + port, rate);
@ -974,6 +989,7 @@ ahcintr(unit)
case BAD_STATUS:
{
int scb_index, saved_scb_index;
u_short seqaddr;
/* The sequencer will notify us when a command
* has an error that would be of interest to
@ -989,111 +1005,109 @@ ahcintr(unit)
"valid during seqint 0x%x scb(%d)\n",
unit, intstat, scb_index);
goto clear;
}
}
xs = scb->xs;
xs = scb->xs;
ahc_getscb(port, scb);
ahc_getscb(port, scb);
#ifdef AHCDEBUG
if(xs->sc_link->target == DEBUGTARG)
ahc_print_scb(scb);
if(xs->sc_link->target == DEBUGTARG)
ahc_print_scb(scb);
#endif
xs->status = scb->target_status;
xs->resid = ((scb->residual_data_count[2] << 16) |
(scb->residual_data_count[1] << 8) |
scb->residual_data_count[0]);
switch(scb->target_status){
case SCSI_OK:
printf("ahc%d: Interrupted for staus of "
"0???\n", unit);
break;
case SCSI_CHECK:
xs->status = scb->target_status;
xs->resid = ((scb->residual_data_count[2] << 16) |
(scb->residual_data_count[1] << 8) |
scb->residual_data_count[0]);
switch(scb->target_status){
case SCSI_OK:
printf("ahc%d: Interrupted for staus of"
" 0???\n", unit);
break;
case SCSI_CHECK:
#ifdef AHCDEBUG
printf("ahc%d: SCSI Check requested\n", unit);
printf("ahc%d: target %d, lun %d (%s%d) "
"requests Check Status\n", unit
,xs->sc_link->target
,xs->sc_link->lun
,xs->sc_link->device->name
,xs->sc_link->dev_unit);
#endif
/*Priliminary code for requesting Sense */
/* Enable at your own risk */
#if STILL_NEEDS_TESTING
if((xs->error == XS_NOERROR) &&
!(scb->flags & SCB_SENSE))
{
if((xs->error == XS_NOERROR) &&
!(scb->flags & SCB_SENSE)) {
struct ahc_dma_seg *sg = scb->ahc_dma;
struct scsi_sense *sc = &(scb->sense_cmd);
int scbsave[AHC_SCB_MAX], i;
int queued = inb(QINCNT + port);
u_char tcl = scb->target_channel_lun;
int i, active;
#ifdef AHCDEBUG
printf("SENDING SENSE.\n");
printf("ahc%d: target %d, lun %d "
"(%s%d) Sending Sense\n", unit
,xs->sc_link->target
,xs->sc_link->lun
,xs->sc_link->device->name
,xs->sc_link->dev_unit);
#endif
bzero(scb, SCB_SIZE);
scb->flags |= SCB_SENSE;
xs->error = XS_SENSE;
sc->op_code = REQUEST_SENSE;
sc->byte2 = xs->sc_link->lun << 5;
sc->length = sizeof(struct scsi_sense_data);
scb->cmdlen = sizeof(*sc);
scb->cmdpointer = KVTOPHYS(sc);
scb->SG_segment_count = 1;
scb->SG_list_pointer = KVTOPHYS(sg);
sc->control = 0;
sg->addr = KVTOPHYS(&xs->sense);
sg->len = sizeof(struct scsi_sense_data);
scb->target_channel_lun = tcl;
scb->SG_segment_count = 1;
scb->SG_list_pointer = KVTOPHYS(sg);
scb->cmdpointer = KVTOPHYS(sc);
scb->cmdlen = sizeof(*sc);
/*
* Reinsert us at head of
* queue
* Download new command.
*/
outb(SCBCNT + port, 0x80);
outsb(SCBARRAY + port, scb, SCB_SIZE);
outb(SCBCNT + port, 0);
for (i = 0; i < queued; i++)
scbsave[i] = inb(QINFIFO + port);
outb(QINFIFO + port, scb->position);
for (i = 0; i < queued; i++)
outb(QINFIFO + port, scbsave[i]);
/* New lease on life */
untimeout(ahc_timeout, (caddr_t)scb);
timeout(ahc_timeout, (caddr_t)scb,
(xs->timeout * hz) / 1000);
outb(SCBCNT + port, 0x80);
outsb(SCBARRAY + port, scb, SCB_SIZE);
outb(SCBCNT + port, 0);
goto clear;
}
#endif
xs->error = XS_DRIVER_STUFFUP;
break;
case SCSI_BUSY:
xs->error = XS_BUSY;
printf("ahc%d: Target Busy\n", unit);
break;
default:
#ifdef AHCDEBUG
if (ahc_debug & AHC_SHOWMISC)
{
printf("unexpected targ_status: %x\n",
scb->target_status);
}
#endif /*AHCDEBUG */
xs->error = XS_DRIVER_STUFFUP;
break;
}
untimeout(ahc_timeout, (caddr_t)scb);
ahc_done(unit, scb);
break;
}
default:
printf("ahc: seqint, "
"intstat = 0x%x, scsisigi = 0x%x\n",
}
/*
* Clear the SCB_SENSE Flag and have
* the sequencer do a normal command
* complete with either a "DRIVER_STUFFUP"
* error or whatever other error condition
* we already had.
*/
scb->flags &= ~SCB_SENSE;
if(xs->error == XS_NOERROR)
xs->error = XS_DRIVER_STUFFUP;
break;
case SCSI_BUSY:
xs->error = XS_BUSY;
printf("ahc%d: Target Busy\n", unit);
break;
default:
printf("unexpected targ_status: %x\n",
scb->target_status);
xs->error = XS_DRIVER_STUFFUP;
break;
}
seqaddr = inw(SEQADDR0 + port);
outw(SEQADDR0 + port, seqaddr + 1);
break;
}
default:
printf("ahc: seqint, "
"intstat == 0x%x, scsisigi = 0x%x\n",
intstat, inb(SCSISIGI + port));
break;
}
clear:
/*
* Clear the upper byte that holds SEQINT status
* codes and clear the SEQINT bit.
*/
clear:
outb(CLRINT + port, CLRSEQINT);
/*
@ -1111,7 +1125,7 @@ ahcintr(unit)
status = inb(SSTAT1 + port);
scb = ahc->scbarray[scb_index];
if (!scb || scb->flags != SCB_ACTIVE) {
if (!scb || !(scb->flags & SCB_ACTIVE)) {
printf("ahc%d: ahcintr - referenced scb not "
"valid during scsiint 0x%x scb(%d)\n",
unit, status, scb_index);
@ -1123,8 +1137,9 @@ ahcintr(unit)
}
xs = scb->xs;
if (status & SELTO) {
if (status & SELTO) {
u_char active;
int active_port = HA_ACTIVE + port;
outb(SCSISEQ + port, 0);
xs->error = XS_TIMEOUT;
/*
@ -1132,9 +1147,13 @@ ahcintr(unit)
* target, and mark the target as free
*/
outb(HA_MSG_FLAGS + port, 0);
active = inb(ACTIVE_A + port);
active &= ~(0x01 << xs->sc_link->target);
outb(ACTIVE_A + port, active);
if (scb->target_channel_lun & 0x88)
active_port++;
active = inb(active_port) &
~(0x01 << (xs->sc_link->target & 0x07));
outb(active_port, active);
outb(CLRSINT1 + port, CLRSELTIMEO);
RESTART_SEQUENCER(ahc);
@ -1191,8 +1210,9 @@ ahcintr(unit)
scb = ahc->scbarray[scb_index];
if (!scb || !(scb->flags & SCB_ACTIVE)) {
printf("ahc%d: WARNING "
"no command for scb %d (cmdcmplt)\n",
unit, scb_index);
"no command for scb %d (cmdcmplt)\n"
"QOUTCNT == %d\n",
unit, scb_index, inb(QOUTCNT + port));
outb(CLRINT + port, CLRCMDINT);
continue;
}
@ -1224,11 +1244,14 @@ ahc_done(unit, scb)
* Put the results of the operation
* into the xfer and call whoever started it
*/
if(scb->flags & SCB_SENSE)
xs->error = XS_SENSE;
if ((xs->flags & SCSI_ERR_OK) && !(xs->error == XS_SENSE)) {
/* All went correctly OR errors expected */
xs->error = 0;
}
xs->flags |= ITSDONE;
ahc_free_scb(unit, scb, xs->flags);
scsi_done(xs);
}
@ -1242,7 +1265,7 @@ ahc_init(unit)
{
struct ahc_data *ahc = ahcdata[unit];
int port = ahc->baseport;
int intdef;
int intdef, i;
/*
* Assume we have a board at this stage
@ -1274,15 +1297,18 @@ ahc_init(unit)
switch ( inb(SBLKCTL + port) ) {
case 0:
printf(" Single Channel, ");
outb(HA_FLAGS + port, 0);
break;
case 2:
printf(" Wide SCSI configuration - Unsupported\n");
ahc->type += 2;
outb(HA_FLAGS + port, WIDE_BUS);
return(-1);
break;
case 8:
printf(" Twin Channel - ignoring channel B, ");
printf(" Twin Channel, ");
ahc->type += 1;
outb(HA_FLAGS + port, TWIN_BUS);
break;
default:
printf(" Unsupported adapter type. Ignoring\n");
@ -1319,7 +1345,6 @@ ahc_init(unit)
printf("illegal irq setting\n");
return (EIO);
}
printf("int=%d, ", ahc->vect);
/* who are we on the scsi bus? */
ahc->our_id = (inb(HA_SCSICONF + port) & HSCSIID);
@ -1342,13 +1367,29 @@ ahc_init(unit)
outb(SCSISEQ + port, 0);
/*
* Attempt syncronous negotiation for all targets.
* Look at the information that board initialization or
* the board bios has left us. In the lower four bits of each
* target's scratch space any value other than 0 indicates
* that we should initiate syncronous transfers. If it's zero,
* the user or the BIOS has decided to disable syncronous
* negotiation to that target so we don't activate the needsdr
* flag.
*/
ahc->needsdtr = 0;
for(i = 0; i < 16; i++){
u_char target_settings = inb(HA_TARG_SCRATCH + i + port);
if(target_settings & 0x0f)
ahc->needsdtr |= (0x01 << i);
}
outw( HA_NEEDSDTR + port, ahc->needsdtr );
/*
* Clear the pending messages flag
*/
outb( HA_NEEDSDTR + port, 0xff );
outb( HA_MSG_FLAGS + port, 0);
outb(HA_SCBCOUNT + port, ahc->maxscbs);
outb( ACTIVE_A + port, 0 );
outb( HA_SCBCOUNT + port, ahc->maxscbs);
/* We don't have any busy targets right now */
outw( HA_ACTIVE + port, 0 );
UNPAUSE_SEQUENCER(ahc);
@ -1425,9 +1466,9 @@ ahc_scsi_cmd(xs)
* Put all the arguments for the xfer in the scb
*/
/* Note, Linux sequencer code does not support extra channels */
scb->target_channel_lun = ((xs->sc_link->target << 4) & 0xF0) |
xs->sc_link->lun & 0x7;
((u_long)xs->sc_link->fordriver & 0x08) |
xs->sc_link->lun & 0x07;
scb->cmdlen = xs->cmdlen;
scb->cmdpointer = KVTOPHYS(xs->cmd);
if (xs->datalen) { /* should use S/G only if not zero length */
@ -1564,9 +1605,9 @@ ahc_free_scb(unit, scb, flags)
if (!(flags & SCSI_NOMASK))
opri = splbio();
scb->flags = SCB_FREE;
scb->next = ahc->free_scb;
ahc->free_scb = scb;
scb->flags = SCB_FREE;
/*
* If there were none, wake abybody waiting for
* one to come free, starting with queued entries
@ -1643,7 +1684,7 @@ void ahc_loadseq(port)
int port;
{
static unsigned char seqprog[] = {
# include <gnu/misc/aic7770/aic7770_seq.h>
# include "aic7770_seq.h"
};
outb(SEQCTL + port, PERRORDIS|SEQRESET|LOADRAM);
@ -1681,6 +1722,103 @@ ahc_poll(int unit, int wait)
return (0);
}
void
ahc_abort_scb( unit, ahc, scb )
int unit;
struct ahc_data *ahc;
struct scb *scb;
{
int port = ahc->baseport;
int found = 0;
int active_scb;
PAUSE_SEQUENCER(ahc);
/*
* Case 1: In the QINFIFO
*/
{
int saved_queue[AHC_SCB_MAX];
int i;
int queued = inb(QINCNT + port);
for( i = 0; i < (queued - found); i++){
saved_queue[i] = inb(QINFIFO + port);
if( saved_queue[i] == scb->position ){
i--;
found = 1;
}
}
/* Re-insert entries back into the queue */
for( queued = 0; queued < i; queued++ )
outb(QINFIFO + port, saved_queue[queued]);
if( found ){
goto done;
}
}
active_scb = inb(SCBPTR + port);
/*
* Case 2: Not the active command
*/
if( active_scb != scb->position ){
/*
* Select the SCB we want to abort
* and turn off the disconnected bit.
* the driver will then abort the command
* and notify us of the abort.
*/
int scb_control;
outb(SCBPTR + port, scb->position);
scb_control = inb(SCBARRAY + port);
scb_control &= ~SCB_DIS;
outb(SCBARRAY + port, scb_control);
outb(SCBPTR + port, active_scb);
goto done;
}
/*
* Case 3: Currently active command
*/
if (inb(HA_MSG_FLAGS + port) & 0x80) {
/*
* If there's a message in progress,
* reset the bus and have all devices renegotiate.
*/
if(scb->target_channel_lun & 0x08){
outb(HA_NEEDSDTR + 1 + port, ahc->needsdtr >> 8);
outb(HA_ACTIVE + 1, 0);
}
else if (ahc->type == AHC_274W || ahc->type == AHC_284W){
outw(HA_NEEDSDTR, ahc->needsdtr);
outw(HA_ACTIVE, 0);
}
else{
outb(HA_NEEDSDTR + port, ahc->needsdtr & 0xff);
outb(HA_ACTIVE, 0);
}
outb(SCSISEQ + port, SCSIRSTO);
DELAY(50);
outb(SCSISEQ + port, 0);
goto done;
}
/*
* Otherwise, set up an abort message and have the sequencer
* clean up
*/
outb(HA_MSG_FLAGS + port, 0x80);
outb(HA_MSG_LEN + port, 1);
outb(HA_MSG_START + port, MSG_ABORT);
outb(SCSISIGO + port, inb(HA_SIGSTATE + port) | 0x10);
done:
scb->flags |= SCB_ABORTED;
UNPAUSE_SEQUENCER(ahc);
ahc_done(unit, scb);
return;
}
void
ahc_timeout(void *arg1)
{
@ -1691,18 +1829,15 @@ ahc_timeout(void *arg1)
unit = scb->xs->sc_link->adapter_unit;
ahc = ahcdata[unit];
port = ahc->baseport;
printf("ahc%d: target %d, lun %d (%s%d) timed out ", unit
,scb->xs->sc_link->target
,scb->xs->sc_link->lun
,scb->xs->sc_link->device->name
,scb->xs->sc_link->dev_unit);
#if 0
#ifdef AHCDEBUG
if (ahc_debug & AHC_SHOWMISC)
ahc_print_active_scb(unit);
#endif /*AHCDEBUG */
#endif
/*
* If it's immediate, don't try abort it
@ -1714,21 +1849,9 @@ ahc_timeout(void *arg1)
splx(s);
return;
}
/*
* If it has been through before, then
* a previous abort has failed, don't
* try abort again
*/
if (scb->flags == SCB_ABORTED) {
/*
* abort timed out
*/
printf("AGAIN");
scb->xs->retries = 0; /* I MEAN IT ! */
ahc_done(unit, scb);
} else { /* abort the operation that has timed out */
printf("Abort unsupported!!!\n");
}
/* abort the operation that has timed out */
printf("\n");
ahc_abort_scb( unit, ahc, scb );
splx(s);
}

439
sys/i386/scsi/aic7xxx.c
View File

@ -1,7 +1,9 @@
/*
* Driver for the 27/284X series adaptec SCSI controllers written by
* Justin T. Gibbs. Much of this driver was taken from Julian Elischer's
* 1742 driver, so it bears his copyright.
* Driver for the 27/284X series adaptec SCSI controllers
* Copyright (c) 1994 Justin T. Gibbs.
* All rights reserved.
*
* Portions of this driver are based on the FreeBSD 1742 Driver:
*
* Written by Julian Elischer (julian@tfs.com)
* for TRW Financial Systems for use under the MACH(2.5) operating system.
@ -18,7 +20,7 @@
*
* commenced: Sun Sep 27 18:14:01 PDT 1992
*
* $Id: aic7770.c,v 1.6 1994/11/25 22:25:15 ats Exp $
* $Id: aic7770.c,v 1.7 1994/11/29 23:06:54 gibbs Exp $
*/
/*
* TODO:
@ -26,16 +28,12 @@
* Implement Target Mode
* Implement Tagged Queuing
* Add target reset capabilities
* Test the check SCSI sense code
* Write a message abort procedure for use in ahc_timeout
* Add support for the 294X series cards
*
* This driver is very stable, and seems to offer performance
* comprable to the 1742 FreeBSD driver. The only timeouts
* I have ever experienced were due to critical driver bugs
* where an abort wouldn't have helped me anyway. So I haven't
* written code to actually search the QINFIFO and/or kill an
* active command. Same goes for target reset.
* comprable to the 1742 FreeBSD driver. I have not experienced
* any timeouts since the timeout code was written, so in that
* sense, it is untested.
*/
#define AHC_SCB_MAX 16 /*
@ -453,6 +451,11 @@ ahc_registerdev(struct isa_device *id)
* be run without BIOS support installed
*/
/*
* 1 byte per target starting at this address for configuration values
*/
#define HA_TARG_SCRATCH 0xc20
/*
* The sequencer will stick the frist byte of any rejected message here so
* we can see what is getting thrown away.
@ -480,23 +483,27 @@ ahc_registerdev(struct isa_device *id)
* by the BIOS at boot time.
*/
#define HA_ARG_1 0xc4c
#define HA_ARG_2 0xc4d
#define HA_RETURN_1 0xc4c
#define HA_SIGSTATE 0xc4e
#define HA_NEEDSDTR 0xc4f
#define HA_SIGSTATE 0xc4d
#define HA_NEEDSDTR 0xc4e
#define HA_SCBCOUNT 0xc56
#define HA_FLAGS 0xc57
#define TWIN_BUS 0x01
#define WIDE_BUS 0x02
#define HA_ACTIVE 0xc58
#define HA_SCSICONF 0xc5a
#define INTDEF 0xc5c
#define HA_HOSTCONF 0xc5d
#define HA_SCBCOUNT 0xc56
#define ACTIVE_A 0xc57
#define MSG_ABORT 0x06
/*
* Since the sequencer can disable pausing in a critical section, we
* must loop until it actually stops.
* XXX Should add a timeout in here!!
* XXX Should add a timeout in here??
*/
#define PAUSE_SEQUENCER(ahc) \
outb(HCNTRL + ahc->baseport, REQ_PAUSE); \
@ -512,7 +519,7 @@ ahc_registerdev(struct isa_device *id)
*/
#define RESTART_SEQUENCER(ahc) \
do { \
outb( SEQCTL + ahc->baseport, SEQRESET ); \
outb( SEQCTL + ahc->baseport, SEQRESET|FASTMODE ); \
} while (inw(SEQADDR0 + ahc->baseport) != 0); \
\
UNPAUSE_SEQUENCER(ahc);
@ -570,13 +577,13 @@ struct scb {
struct scb *next; /* in free list */
struct scsi_xfer *xs; /* the scsi_xfer for this cmd */
int flags;
#define SCB_FREE 0x00
#define SCB_ACTIVE 0x01
#define SCB_ABORTED 0x02
#define SCB_IMMED 0x04
#define SCB_IMMED_FAIL 0x08
#define SCB_SENSE 0x10
int position; /* Position in scbarray */
#define SCB_FREE 0
#define SCB_ACTIVE 1
#define SCB_ABORTED 2
#define SCB_IMMED 4
#define SCB_IMMED_FAIL 8
#define SCB_SENSE 16
struct ahc_dma_seg ahc_dma[AHC_NSEG] __attribute__ ((packed));
struct scsi_sense sense_cmd; /* SCSI command block */
};
@ -592,6 +599,8 @@ struct ahc_data {
int vect;
struct scb *immed_ecb; /* an outstanding immediete command */
struct scsi_link sc_link;
struct scsi_link sc_link_b; /* Second bus for Twin channel cards */
u_short needsdtr; /* Targets we iniaitiate sync neg to */
int numscbs;
u_char maxscbs;
int unpause;
@ -804,18 +813,18 @@ void ahc_scsirate(scsirate, period, offset, unit, target )
if ((ahc_syncrates[i].period - period) >= 0) {
*scsirate = (ahc_syncrates[i].sxfr) | (offset & 0x0f);
#ifdef AHCDEBUG
printf("ahc%d: target %d synchronous at %sMb/s\n",
unit, target, ahc_syncrates[i].rate );
#ifdef AHCDEBUG
#endif /* AHCDEBUG */
return;
}
}
/* Default to asyncronous transfer */
*scsirate = 0;
#ifdef AHCDEBUG
printf("ahc%d: target %d using asyncronous transfers\n",
unit, target );
#ifdef AHCDEBUG
#endif /* AHCDEBUG */
}
@ -831,6 +840,8 @@ ahc_attach(dev)
int unit = dev->id_unit;
struct ahc_data *ahc = ahcdata[unit];
ahc_registerdev(dev);
/*
* fill in the prototype scsi_link.
*/
@ -839,23 +850,21 @@ ahc_attach(dev)
ahc->sc_link.adapter = &ahc_switch;
ahc->sc_link.device = &ahc_dev;
ahc->sc_link.flags = DEBUGLEVEL;
/*
* Here, we should really fill in up to two different sc_links,
* making use of the extra fields in the sc_link structure so
* we can know which channel any requests are for. Then its just
* a matter of doing a scsi_attachdevs to both instead of the one.
* This should be done when we get or write sequencer code that
* supports more than one channel. XXX
*/
ahc_registerdev(dev);
ahc->sc_link.fordriver = 0;
/*
* ask the adapter what subunits are present
*/
scsi_attachdevs(&(ahc->sc_link));
if(ahc->type == AHC_274T || ahc->type == AHC_284T) {
/* Configure the second scsi bus */
ahc->sc_link_b = ahc->sc_link;
ahc->sc_link_b.fordriver = (void *)0x0008;
printf("ahc%d: Probing Channel B\n", unit);
scsi_attachdevs(&(ahc->sc_link_b));
}
return 1;
}
@ -944,15 +953,21 @@ ahcintr(unit)
case NO_MATCH:
{
u_char active;
int target = (inb(SELID + port) >> 4) & 0x4;
int active_port = HA_ACTIVE + port;
int tcl = inb(SCBARRAY+1 + port);
int target = (tcl >> 4) & 0x0f;
printf("ahc%d: no active SCB for reconnecting "
"target %d - issuing ABORT\n",
unit, target);
active = inb(HA_SCBCOUNT + port);
DELAY(10000);
active = inb(ACTIVE_A + port);
active &= ~(0x01 << target);
outb(ACTIVE_A + port, active);
"target %d, channel %c - issuing ABORT\n",
unit, target, tcl & 0x07);
if( tcl & 0x88 ) {
/* Second channel stores its info
* in byte two of HA_ACTIVE
*/
active_port++;
}
active = inb(active_port);
active &= ~(0x01 << (target & 0x07));
outb(active_port, active);
outb(CLRSINT1 + port, CLRSELTIMEO);
RESTART_SEQUENCER(ahc);
break;
@ -966,7 +981,7 @@ ahcintr(unit)
*/
transfer = inb(HA_ARG_1 + port) << 2;
/* The bottom half of SCSIXFER*/
offset = inb(HA_ARG_2 + port);
offset = inb(ACCUM + port);
ahc_scsirate(&rate, transfer, offset, unit,
inb(SCSIID + port) >> 0x4);
outb(HA_RETURN_1 + port, rate);
@ -974,6 +989,7 @@ ahcintr(unit)
case BAD_STATUS:
{
int scb_index, saved_scb_index;
u_short seqaddr;
/* The sequencer will notify us when a command
* has an error that would be of interest to
@ -989,111 +1005,109 @@ ahcintr(unit)
"valid during seqint 0x%x scb(%d)\n",
unit, intstat, scb_index);
goto clear;
}
}
xs = scb->xs;
xs = scb->xs;
ahc_getscb(port, scb);
ahc_getscb(port, scb);
#ifdef AHCDEBUG
if(xs->sc_link->target == DEBUGTARG)
ahc_print_scb(scb);
if(xs->sc_link->target == DEBUGTARG)
ahc_print_scb(scb);
#endif
xs->status = scb->target_status;
xs->resid = ((scb->residual_data_count[2] << 16) |
(scb->residual_data_count[1] << 8) |
scb->residual_data_count[0]);
switch(scb->target_status){
case SCSI_OK:
printf("ahc%d: Interrupted for staus of "
"0???\n", unit);
break;
case SCSI_CHECK:
xs->status = scb->target_status;
xs->resid = ((scb->residual_data_count[2] << 16) |
(scb->residual_data_count[1] << 8) |
scb->residual_data_count[0]);
switch(scb->target_status){
case SCSI_OK:
printf("ahc%d: Interrupted for staus of"
" 0???\n", unit);
break;
case SCSI_CHECK:
#ifdef AHCDEBUG
printf("ahc%d: SCSI Check requested\n", unit);
printf("ahc%d: target %d, lun %d (%s%d) "
"requests Check Status\n", unit
,xs->sc_link->target
,xs->sc_link->lun
,xs->sc_link->device->name
,xs->sc_link->dev_unit);
#endif
/*Priliminary code for requesting Sense */
/* Enable at your own risk */
#if STILL_NEEDS_TESTING
if((xs->error == XS_NOERROR) &&
!(scb->flags & SCB_SENSE))
{
if((xs->error == XS_NOERROR) &&
!(scb->flags & SCB_SENSE)) {
struct ahc_dma_seg *sg = scb->ahc_dma;
struct scsi_sense *sc = &(scb->sense_cmd);
int scbsave[AHC_SCB_MAX], i;
int queued = inb(QINCNT + port);
u_char tcl = scb->target_channel_lun;
int i, active;
#ifdef AHCDEBUG
printf("SENDING SENSE.\n");
printf("ahc%d: target %d, lun %d "
"(%s%d) Sending Sense\n", unit
,xs->sc_link->target
,xs->sc_link->lun
,xs->sc_link->device->name
,xs->sc_link->dev_unit);
#endif
bzero(scb, SCB_SIZE);
scb->flags |= SCB_SENSE;
xs->error = XS_SENSE;
sc->op_code = REQUEST_SENSE;
sc->byte2 = xs->sc_link->lun << 5;
sc->length = sizeof(struct scsi_sense_data);
scb->cmdlen = sizeof(*sc);
scb->cmdpointer = KVTOPHYS(sc);
scb->SG_segment_count = 1;
scb->SG_list_pointer = KVTOPHYS(sg);
sc->control = 0;
sg->addr = KVTOPHYS(&xs->sense);
sg->len = sizeof(struct scsi_sense_data);
scb->target_channel_lun = tcl;
scb->SG_segment_count = 1;
scb->SG_list_pointer = KVTOPHYS(sg);
scb->cmdpointer = KVTOPHYS(sc);
scb->cmdlen = sizeof(*sc);
/*
* Reinsert us at head of
* queue
* Download new command.
*/
outb(SCBCNT + port, 0x80);
outsb(SCBARRAY + port, scb, SCB_SIZE);
outb(SCBCNT + port, 0);
for (i = 0; i < queued; i++)
scbsave[i] = inb(QINFIFO + port);
outb(QINFIFO + port, scb->position);
for (i = 0; i < queued; i++)
outb(QINFIFO + port, scbsave[i]);
/* New lease on life */
untimeout(ahc_timeout, (caddr_t)scb);
timeout(ahc_timeout, (caddr_t)scb,
(xs->timeout * hz) / 1000);
outb(SCBCNT + port, 0x80);
outsb(SCBARRAY + port, scb, SCB_SIZE);
outb(SCBCNT + port, 0);
goto clear;
}
#endif
xs->error = XS_DRIVER_STUFFUP;
break;
case SCSI_BUSY:
xs->error = XS_BUSY;
printf("ahc%d: Target Busy\n", unit);
break;
default:
#ifdef AHCDEBUG
if (ahc_debug & AHC_SHOWMISC)
{
printf("unexpected targ_status: %x\n",
scb->target_status);
}
#endif /*AHCDEBUG */
xs->error = XS_DRIVER_STUFFUP;
break;
}
untimeout(ahc_timeout, (caddr_t)scb);
ahc_done(unit, scb);
break;
}
default:
printf("ahc: seqint, "
"intstat = 0x%x, scsisigi = 0x%x\n",
}
/*
* Clear the SCB_SENSE Flag and have
* the sequencer do a normal command
* complete with either a "DRIVER_STUFFUP"
* error or whatever other error condition
* we already had.
*/
scb->flags &= ~SCB_SENSE;
if(xs->error == XS_NOERROR)
xs->error = XS_DRIVER_STUFFUP;
break;
case SCSI_BUSY:
xs->error = XS_BUSY;
printf("ahc%d: Target Busy\n", unit);
break;
default:
printf("unexpected targ_status: %x\n",
scb->target_status);
xs->error = XS_DRIVER_STUFFUP;
break;
}
seqaddr = inw(SEQADDR0 + port);
outw(SEQADDR0 + port, seqaddr + 1);
break;
}
default:
printf("ahc: seqint, "
"intstat == 0x%x, scsisigi = 0x%x\n",
intstat, inb(SCSISIGI + port));
break;
}
clear:
/*
* Clear the upper byte that holds SEQINT status
* codes and clear the SEQINT bit.
*/
clear:
outb(CLRINT + port, CLRSEQINT);
/*
@ -1111,7 +1125,7 @@ ahcintr(unit)
status = inb(SSTAT1 + port);
scb = ahc->scbarray[scb_index];
if (!scb || scb->flags != SCB_ACTIVE) {
if (!scb || !(scb->flags & SCB_ACTIVE)) {
printf("ahc%d: ahcintr - referenced scb not "
"valid during scsiint 0x%x scb(%d)\n",
unit, status, scb_index);
@ -1123,8 +1137,9 @@ ahcintr(unit)
}
xs = scb->xs;
if (status & SELTO) {
if (status & SELTO) {
u_char active;
int active_port = HA_ACTIVE + port;
outb(SCSISEQ + port, 0);
xs->error = XS_TIMEOUT;
/*
@ -1132,9 +1147,13 @@ ahcintr(unit)
* target, and mark the target as free
*/
outb(HA_MSG_FLAGS + port, 0);
active = inb(ACTIVE_A + port);
active &= ~(0x01 << xs->sc_link->target);
outb(ACTIVE_A + port, active);
if (scb->target_channel_lun & 0x88)
active_port++;
active = inb(active_port) &
~(0x01 << (xs->sc_link->target & 0x07));
outb(active_port, active);
outb(CLRSINT1 + port, CLRSELTIMEO);
RESTART_SEQUENCER(ahc);
@ -1191,8 +1210,9 @@ ahcintr(unit)
scb = ahc->scbarray[scb_index];
if (!scb || !(scb->flags & SCB_ACTIVE)) {
printf("ahc%d: WARNING "
"no command for scb %d (cmdcmplt)\n",
unit, scb_index);
"no command for scb %d (cmdcmplt)\n"
"QOUTCNT == %d\n",
unit, scb_index, inb(QOUTCNT + port));
outb(CLRINT + port, CLRCMDINT);
continue;
}
@ -1224,11 +1244,14 @@ ahc_done(unit, scb)
* Put the results of the operation
* into the xfer and call whoever started it
*/
if(scb->flags & SCB_SENSE)
xs->error = XS_SENSE;
if ((xs->flags & SCSI_ERR_OK) && !(xs->error == XS_SENSE)) {
/* All went correctly OR errors expected */
xs->error = 0;
}
xs->flags |= ITSDONE;
ahc_free_scb(unit, scb, xs->flags);
scsi_done(xs);
}
@ -1242,7 +1265,7 @@ ahc_init(unit)
{
struct ahc_data *ahc = ahcdata[unit];
int port = ahc->baseport;
int intdef;
int intdef, i;
/*
* Assume we have a board at this stage
@ -1274,15 +1297,18 @@ ahc_init(unit)
switch ( inb(SBLKCTL + port) ) {
case 0:
printf(" Single Channel, ");
outb(HA_FLAGS + port, 0);
break;
case 2:
printf(" Wide SCSI configuration - Unsupported\n");
ahc->type += 2;
outb(HA_FLAGS + port, WIDE_BUS);
return(-1);
break;
case 8:
printf(" Twin Channel - ignoring channel B, ");
printf(" Twin Channel, ");
ahc->type += 1;
outb(HA_FLAGS + port, TWIN_BUS);
break;
default:
printf(" Unsupported adapter type. Ignoring\n");
@ -1319,7 +1345,6 @@ ahc_init(unit)
printf("illegal irq setting\n");
return (EIO);
}
printf("int=%d, ", ahc->vect);
/* who are we on the scsi bus? */
ahc->our_id = (inb(HA_SCSICONF + port) & HSCSIID);
@ -1342,13 +1367,29 @@ ahc_init(unit)
outb(SCSISEQ + port, 0);
/*
* Attempt syncronous negotiation for all targets.
* Look at the information that board initialization or
* the board bios has left us. In the lower four bits of each
* target's scratch space any value other than 0 indicates
* that we should initiate syncronous transfers. If it's zero,
* the user or the BIOS has decided to disable syncronous
* negotiation to that target so we don't activate the needsdr
* flag.
*/
ahc->needsdtr = 0;
for(i = 0; i < 16; i++){
u_char target_settings = inb(HA_TARG_SCRATCH + i + port);
if(target_settings & 0x0f)
ahc->needsdtr |= (0x01 << i);
}
outw( HA_NEEDSDTR + port, ahc->needsdtr );
/*
* Clear the pending messages flag
*/
outb( HA_NEEDSDTR + port, 0xff );
outb( HA_MSG_FLAGS + port, 0);
outb(HA_SCBCOUNT + port, ahc->maxscbs);
outb( ACTIVE_A + port, 0 );
outb( HA_SCBCOUNT + port, ahc->maxscbs);
/* We don't have any busy targets right now */
outw( HA_ACTIVE + port, 0 );
UNPAUSE_SEQUENCER(ahc);
@ -1425,9 +1466,9 @@ ahc_scsi_cmd(xs)
* Put all the arguments for the xfer in the scb
*/
/* Note, Linux sequencer code does not support extra channels */
scb->target_channel_lun = ((xs->sc_link->target << 4) & 0xF0) |
xs->sc_link->lun & 0x7;
((u_long)xs->sc_link->fordriver & 0x08) |
xs->sc_link->lun & 0x07;
scb->cmdlen = xs->cmdlen;
scb->cmdpointer = KVTOPHYS(xs->cmd);
if (xs->datalen) { /* should use S/G only if not zero length */
@ -1564,9 +1605,9 @@ ahc_free_scb(unit, scb, flags)
if (!(flags & SCSI_NOMASK))
opri = splbio();
scb->flags = SCB_FREE;
scb->next = ahc->free_scb;
ahc->free_scb = scb;
scb->flags = SCB_FREE;
/*
* If there were none, wake abybody waiting for
* one to come free, starting with queued entries
@ -1643,7 +1684,7 @@ void ahc_loadseq(port)
int port;
{
static unsigned char seqprog[] = {
# include <gnu/misc/aic7770/aic7770_seq.h>
# include "aic7770_seq.h"
};
outb(SEQCTL + port, PERRORDIS|SEQRESET|LOADRAM);
@ -1681,6 +1722,103 @@ ahc_poll(int unit, int wait)
return (0);
}
void
ahc_abort_scb( unit, ahc, scb )
int unit;
struct ahc_data *ahc;
struct scb *scb;
{
int port = ahc->baseport;
int found = 0;
int active_scb;
PAUSE_SEQUENCER(ahc);
/*
* Case 1: In the QINFIFO
*/
{
int saved_queue[AHC_SCB_MAX];
int i;
int queued = inb(QINCNT + port);
for( i = 0; i < (queued - found); i++){
saved_queue[i] = inb(QINFIFO + port);
if( saved_queue[i] == scb->position ){
i--;
found = 1;
}
}
/* Re-insert entries back into the queue */
for( queued = 0; queued < i; queued++ )
outb(QINFIFO + port, saved_queue[queued]);
if( found ){
goto done;
}
}
active_scb = inb(SCBPTR + port);
/*
* Case 2: Not the active command
*/
if( active_scb != scb->position ){
/*
* Select the SCB we want to abort
* and turn off the disconnected bit.
* the driver will then abort the command
* and notify us of the abort.
*/
int scb_control;
outb(SCBPTR + port, scb->position);
scb_control = inb(SCBARRAY + port);
scb_control &= ~SCB_DIS;
outb(SCBARRAY + port, scb_control);
outb(SCBPTR + port, active_scb);
goto done;
}
/*
* Case 3: Currently active command
*/
if (inb(HA_MSG_FLAGS + port) & 0x80) {
/*
* If there's a message in progress,
* reset the bus and have all devices renegotiate.
*/
if(scb->target_channel_lun & 0x08){
outb(HA_NEEDSDTR + 1 + port, ahc->needsdtr >> 8);
outb(HA_ACTIVE + 1, 0);
}
else if (ahc->type == AHC_274W || ahc->type == AHC_284W){
outw(HA_NEEDSDTR, ahc->needsdtr);
outw(HA_ACTIVE, 0);
}
else{
outb(HA_NEEDSDTR + port, ahc->needsdtr & 0xff);
outb(HA_ACTIVE, 0);
}
outb(SCSISEQ + port, SCSIRSTO);
DELAY(50);
outb(SCSISEQ + port, 0);
goto done;
}
/*
* Otherwise, set up an abort message and have the sequencer
* clean up
*/
outb(HA_MSG_FLAGS + port, 0x80);
outb(HA_MSG_LEN + port, 1);
outb(HA_MSG_START + port, MSG_ABORT);
outb(SCSISIGO + port, inb(HA_SIGSTATE + port) | 0x10);
done:
scb->flags |= SCB_ABORTED;
UNPAUSE_SEQUENCER(ahc);
ahc_done(unit, scb);
return;
}
void
ahc_timeout(void *arg1)
{
@ -1691,18 +1829,15 @@ ahc_timeout(void *arg1)
unit = scb->xs->sc_link->adapter_unit;
ahc = ahcdata[unit];
port = ahc->baseport;
printf("ahc%d: target %d, lun %d (%s%d) timed out ", unit
,scb->xs->sc_link->target
,scb->xs->sc_link->lun
,scb->xs->sc_link->device->name
,scb->xs->sc_link->dev_unit);
#if 0
#ifdef AHCDEBUG
if (ahc_debug & AHC_SHOWMISC)
ahc_print_active_scb(unit);
#endif /*AHCDEBUG */
#endif
/*
* If it's immediate, don't try abort it
@ -1714,21 +1849,9 @@ ahc_timeout(void *arg1)
splx(s);
return;
}
/*
* If it has been through before, then
* a previous abort has failed, don't
* try abort again
*/
if (scb->flags == SCB_ABORTED) {
/*
* abort timed out
*/
printf("AGAIN");
scb->xs->retries = 0; /* I MEAN IT ! */
ahc_done(unit, scb);
} else { /* abort the operation that has timed out */
printf("Abort unsupported!!!\n");
}
/* abort the operation that has timed out */
printf("\n");
ahc_abort_scb( unit, ahc, scb );
splx(s);
}