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NetBSD/sys/dev/ic/isp_netbsd.c

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/* $NetBSD: isp_netbsd.c,v 1.10 1999/02/09 00:42:22 mjacob Exp $ */
/* release_02_05_99 */
/*
* Platform (NetBSD) dependent common attachment code for Qlogic adapters.
*
*---------------------------------------
* Copyright (c) 1997, 1998 by Matthew Jacob
* NASA/Ames Research Center
* All rights reserved.
*---------------------------------------
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice immediately at the beginning of the file, without modification,
* this list of conditions, and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* The author may be reached via electronic communications at
*
* mjacob@nas.nasa.gov
* mjacob@feral.com
*
* or, via United States Postal Address
*
* Matthew Jacob
* Feral Software
* 2339 3rd Street
* Suite 24
* San Francisco, CA, 94107
*/
#include <dev/ic/isp_netbsd.h>
static void ispminphys __P((struct buf *));
static int32_t ispcmd __P((ISP_SCSI_XFER_T *));
static struct scsipi_device isp_dev = { NULL, NULL, NULL, NULL };
static int isp_poll __P((struct ispsoftc *, ISP_SCSI_XFER_T *, int));
static void isp_watch __P((void *));
static void isp_internal_restart __P((void *));
#define FC_OPENINGS RQUEST_QUEUE_LEN / (MAX_FC_TARG-1)
#define PI_OPENINGS RQUEST_QUEUE_LEN / (MAX_TARGETS-1)
/*
* Complete attachment of hardware, include subdevices.
*/
void
isp_attach(isp)
struct ispsoftc *isp;
{
isp->isp_osinfo._adapter.scsipi_cmd = ispcmd;
isp->isp_osinfo._adapter.scsipi_minphys = ispminphys;
isp->isp_state = ISP_RUNSTATE;
isp->isp_osinfo._link.scsipi_scsi.channel = SCSI_CHANNEL_ONLY_ONE;
isp->isp_osinfo._link.adapter_softc = isp;
isp->isp_osinfo._link.device = &isp_dev;
isp->isp_osinfo._link.adapter = &isp->isp_osinfo._adapter;
TAILQ_INIT(&isp->isp_osinfo.waitq);
if (isp->isp_type & ISP_HA_FC) {
isp->isp_osinfo._link.scsipi_scsi.max_target = MAX_FC_TARG-1;
#ifdef SCCLUN
/*
* 16 bits worth, but let's be reasonable..
*/
isp->isp_osinfo._link.scsipi_scsi.max_lun = 255;
#else
isp->isp_osinfo._link.scsipi_scsi.max_lun = 15;
#endif
isp->isp_osinfo._link.openings = FC_OPENINGS;
isp->isp_osinfo._link.scsipi_scsi.adapter_target =
((fcparam *)isp->isp_param)->isp_loopid;
} else {
isp->isp_osinfo._link.openings = PI_OPENINGS;
isp->isp_osinfo._link.scsipi_scsi.max_target = MAX_TARGETS-1;
if (isp->isp_bustype == ISP_BT_SBUS) {
isp->isp_osinfo._link.scsipi_scsi.max_lun = 7;
} else {
/*
* Too much target breakage at present.
*/
#if 0
if (isp->isp_fwrev >= ISP_FW_REV(7,55))
isp->isp_osinfo._link.scsipi_scsi.max_lun = 31;
else
#endif
isp->isp_osinfo._link.scsipi_scsi.max_lun = 7;
}
isp->isp_osinfo._link.scsipi_scsi.adapter_target =
((sdparam *)isp->isp_param)->isp_initiator_id;
}
if (isp->isp_osinfo._link.openings < 2)
isp->isp_osinfo._link.openings = 2;
isp->isp_osinfo._link.type = BUS_SCSI;
/*
* Send a SCSI Bus Reset (used to be done as part of attach,
* but now left to the OS outer layers).
*
* XXX: For now, skip resets for FC because the method by which
* XXX: we deal with loop down after issuing resets (which causes
* XXX: port logouts for all devices) needs interrupts to run so
* XXX: that async events happen.
*/
if (isp->isp_type & ISP_HA_SCSI)
(void) isp_control(isp, ISPCTL_RESET_BUS, NULL);
/*
* Start the watchdog.
*/
isp->isp_dogactive = 1;
timeout(isp_watch, isp, 30 * hz);
/*
* And attach children (if any).
*/
config_found((void *)isp, &isp->isp_osinfo._link, scsiprint);
}
/*
* minphys our xfers
*
* Unfortunately, the buffer pointer describes the target device- not the
* adapter device, so we can't use the pointer to find out what kind of
* adapter we are and adjust accordingly.
*/
static void
ispminphys(bp)
struct buf *bp;
{
/*
* XX: Only the 1020 has a 24 bit limit.
*/
if (bp->b_bcount >= (1 << 24)) {
bp->b_bcount = (1 << 24);
}
minphys(bp);
}
static int
ispcmd(xs)
ISP_SCSI_XFER_T *xs;
{
struct ispsoftc *isp;
int result;
int s;
isp = XS_ISP(xs);
s = splbio();
/*
* This is less efficient than I would like in that the
* majority of cases will have to do some pointer deferences
* to find out that things don't need to be updated.
*/
if ((xs->flags & SCSI_AUTOCONF) == 0 && (isp->isp_type & ISP_HA_SCSI)) {
sdparam *sdp = isp->isp_param;
if (sdp->isp_devparam[XS_TGT(xs)].dev_flags !=
sdp->isp_devparam[XS_TGT(xs)].cur_dflags) {
u_int16_t f = DPARM_WIDE|DPARM_SYNC|DPARM_TQING;
if (xs->sc_link->quirks & SDEV_NOSYNC)
f &= ~DPARM_SYNC;
if (xs->sc_link->quirks & SDEV_NOWIDE)
f &= ~DPARM_WIDE;
if (xs->sc_link->quirks & SDEV_NOTAG)
f &= ~DPARM_TQING;
sdp->isp_devparam[XS_TGT(xs)].dev_flags &=
~(DPARM_WIDE|DPARM_SYNC|DPARM_TQING);
sdp->isp_devparam[XS_TGT(xs)].dev_flags |= f;
sdp->isp_devparam[XS_TGT(xs)].dev_update = 1;
isp->isp_update = 1;
}
}
/*
* Check for queue blockage...
*/
if (isp->isp_osinfo.blocked) {
if (xs->flags & SCSI_POLL) {
xs->error = XS_DRIVER_STUFFUP;
splx(s);
return (TRY_AGAIN_LATER);
}
TAILQ_INSERT_TAIL(&isp->isp_osinfo.waitq, xs, adapter_q);
splx(s);
return (CMD_QUEUED);
}
result = ispscsicmd(xs);
if (result != CMD_QUEUED || (xs->flags & SCSI_POLL) == 0) {
(void) splx(s);
return (result);
}
/*
* If we can't use interrupts, poll on completion.
*/
if (isp_poll(isp, xs, XS_TIME(xs))) {
/*
* If no other error occurred but we didn't finish,
* something bad happened.
*/
if (XS_IS_CMD_DONE(xs) == 0) {
isp->isp_nactive--;
if (isp->isp_nactive < 0)
isp->isp_nactive = 0;
if (XS_NOERR(xs)) {
isp_lostcmd(isp, xs);
XS_SETERR(xs, HBA_BOTCH);
}
}
}
(void) splx(s);
return (CMD_COMPLETE);
}
static int
isp_poll(isp, xs, mswait)
struct ispsoftc *isp;
ISP_SCSI_XFER_T *xs;
int mswait;
{
while (mswait) {
/* Try the interrupt handling routine */
(void)isp_intr((void *)isp);
/* See if the xs is now done */
if (XS_IS_CMD_DONE(xs)) {
return (0);
}
SYS_DELAY(1000); /* wait one millisecond */
mswait--;
}
return (1);
}
static void
isp_watch(arg)
void *arg;
{
int i;
struct ispsoftc *isp = arg;
ISP_SCSI_XFER_T *xs;
ISP_ILOCKVAL_DECL;
/*
* Look for completely dead commands (but not polled ones).
*/
ISP_ILOCK(isp);
for (i = 0; i < RQUEST_QUEUE_LEN; i++) {
if ((xs = (ISP_SCSI_XFER_T *) isp->isp_xflist[i]) == NULL) {
continue;
}
if (XS_TIME(xs) == 0) {
continue;
}
XS_TIME(xs) -= (WATCH_INTERVAL * 1000);
/*
* Avoid later thinking that this
* transaction is not being timed.
* Then give ourselves to watchdog
* periods of grace.
*/
if (XS_TIME(xs) == 0) {
XS_TIME(xs) = 1;
} else if (XS_TIME(xs) > -(2 * WATCH_INTERVAL * 1000)) {
continue;
}
if (isp_control(isp, ISPCTL_ABORT_CMD, xs)) {
printf("%s: isp_watch failed to abort command\n",
isp->isp_name);
isp_restart(isp);
break;
}
}
timeout(isp_watch, isp, WATCH_INTERVAL * hz);
isp->isp_dogactive = 1;
ISP_IUNLOCK(isp);
}
/*
* Free any associated resources prior to decommissioning and
* set the card to a known state (so it doesn't wake up and kick
* us when we aren't expecting it to).
*
* Locks are held before coming here.
*/
void
isp_uninit(isp)
struct ispsoftc *isp;
{
ISP_ILOCKVAL_DECL;
ISP_ILOCK(isp);
/*
* Leave with interrupts disabled.
*/
DISABLE_INTS(isp);
/*
* Turn off the watchdog (if active).
*/
if (isp->isp_dogactive) {
untimeout(isp_watch, isp);
isp->isp_dogactive = 0;
}
ISP_IUNLOCK(isp);
}
/*
* Restart function after a LOOP UP event (e.g.),
* done as a timeout for some hysteresis.
*/
static void
isp_internal_restart(arg)
void *arg;
{
struct ispsoftc *isp = arg;
int result, nrestarted = 0, s = splbio();
if (isp->isp_osinfo.blocked == 0) {
struct scsipi_xfer *xs;
while ((xs = TAILQ_FIRST(&isp->isp_osinfo.waitq)) != NULL) {
TAILQ_REMOVE(&isp->isp_osinfo.waitq, xs, adapter_q);
if ((result = ispscsicmd(xs)) != CMD_QUEUED) {
printf("%s: botched command restart (0x%x)\n",
isp->isp_name, result);
xs->flags |= ITSDONE;
if (xs->error == XS_NOERROR)
xs->error = XS_DRIVER_STUFFUP;
scsipi_done(xs);
}
nrestarted++;
}
printf("%s: requeued %d commands\n", isp->isp_name, nrestarted);
}
(void) splx(s);
}
int
isp_async(isp, cmd, arg)
struct ispsoftc *isp;
ispasync_t cmd;
void *arg;
{
int s = splbio();
switch (cmd) {
case ISPASYNC_LOOP_DOWN:
/*
* Hopefully we get here in time to minimize the number
* of commands we are firing off that are sure to die.
*/
isp->isp_osinfo.blocked = 1;
break;
case ISPASYNC_LOOP_UP:
isp->isp_osinfo.blocked = 0;
timeout(isp_internal_restart, isp, 1);
break;
case ISPASYNC_NEW_TGT_PARAMS:
if (isp->isp_type & ISP_HA_SCSI) {
sdparam *sdp = isp->isp_param;
char *wt;
int ns, flags, tgt;
tgt = *((int *) arg);
flags = sdp->isp_devparam[tgt].dev_flags;
if (flags & DPARM_SYNC) {
ns = sdp->isp_devparam[tgt].sync_period * 4;
} else {
ns = 0;
}
switch (flags & (DPARM_WIDE|DPARM_TQING)) {
case DPARM_WIDE:
wt = ", 16 bit wide\n";
break;
case DPARM_TQING:
wt = ", Tagged Queueing Enabled\n";
break;
case DPARM_WIDE|DPARM_TQING:
wt = ", 16 bit wide, Tagged Queueing Enabled\n";
break;
default:
wt = "\n";
break;
}
if (ns) {
printf("%s: Target %d at %dMHz Max Offset %d%s",
isp->isp_name, tgt, 1000 / ns,
sdp->isp_devparam[tgt].sync_offset, wt);
} else {
printf("%s: Target %d Async Mode%s",
isp->isp_name, tgt, wt);
}
}
break;
default:
break;
}
(void) splx(s);
return (0);
}
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