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/* $NetBSD: aic7xxx_osm.c,v 1.14 2003/11/02 11:07:44 wiz Exp $ */
/*
* Bus independent FreeBSD shim for the aic7xxx based adaptec SCSI controllers
*
* Copyright (c) 1994-2001 Justin T. Gibbs.
* 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, this list of conditions, and the following disclaimer,
* without modification.
* 2. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU Public License ("GPL").
*
* 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.
*
* //depot/aic7xxx/freebsd/dev/aic7xxx/aic7xxx_osm.c#12 $
*
* $FreeBSD: src/sys/dev/aic7xxx/aic7xxx_osm.c,v 1.31 2002/11/30 19:08:58 scottl Exp $
*/
/*
* Ported from FreeBSD by Pascal Renauld, Network Storage Solutions, Inc. - April 2003
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: aic7xxx_osm.c,v 1.14 2003/11/02 11:07:44 wiz Exp $");
#include <dev/ic/aic7xxx_osm.h>
#include <dev/ic/aic7xxx_inline.h>
#ifndef AHC_TMODE_ENABLE
#define AHC_TMODE_ENABLE 0
#endif
static void ahc_action(struct scsipi_channel *chan, scsipi_adapter_req_t req, void *arg);
static void ahc_execute_scb(void *arg, bus_dma_segment_t *dm_segs, int nsegments);
static int ahc_poll(struct ahc_softc *ahc, int wait);
static void ahc_setup_data(struct ahc_softc *ahc,
struct scsipi_xfer *xs, struct scb *scb);
static void ahc_set_recoveryscb(struct ahc_softc *ahc, struct scb *scb);
static int ahc_ioctl(struct scsipi_channel *channel, u_long cmd, caddr_t addr, int flag,
struct proc *p);
/*
* Attach all the sub-devices we can find
*/
int
ahc_attach(struct ahc_softc *ahc)
{
u_long s;
int i;
char ahc_info[256];
LIST_INIT(&ahc->pending_scbs);
for (i = 0; i < AHC_NUM_TARGETS; i++)
TAILQ_INIT(&ahc->untagged_queues[i]);
ahc_lock(ahc, &s);
ahc->sc_adapter.adapt_dev = &ahc->sc_dev;
ahc->sc_adapter.adapt_nchannels = (ahc->features & AHC_TWIN) ? 2 : 1;
ahc->sc_adapter.adapt_openings = AHC_MAX_QUEUE;
ahc->sc_adapter.adapt_max_periph = 16;
ahc->sc_adapter.adapt_ioctl = ahc_ioctl;
ahc->sc_adapter.adapt_minphys = ahc_minphys;
ahc->sc_adapter.adapt_request = ahc_action;
ahc->sc_channel.chan_adapter = &ahc->sc_adapter;
ahc->sc_channel.chan_bustype = &scsi_bustype;
ahc->sc_channel.chan_channel = 0;
ahc->sc_channel.chan_ntargets = (ahc->features & AHC_WIDE) ? 16 : 8;
ahc->sc_channel.chan_nluns = 8 /*AHC_NUM_LUNS*/;
ahc->sc_channel.chan_id = ahc->our_id;
if (ahc->features & AHC_TWIN) {
ahc->sc_channel_b = ahc->sc_channel;
ahc->sc_channel_b.chan_id = ahc->our_id_b;
ahc->sc_channel_b.chan_channel = 1;
}
ahc_controller_info(ahc, ahc_info);
printf("%s: %s\n", ahc->sc_dev.dv_xname, ahc_info);
if ((ahc->flags & AHC_PRIMARY_CHANNEL) == 0) {
ahc->sc_child = config_found((void *)&ahc->sc_dev,
&ahc->sc_channel, scsiprint);
if (ahc->features & AHC_TWIN)
ahc->sc_child_b = config_found((void *)&ahc->sc_dev,
&ahc->sc_channel_b, scsiprint);
} else {
if (ahc->features & AHC_TWIN)
ahc->sc_child = config_found((void *)&ahc->sc_dev,
&ahc->sc_channel_b, scsiprint);
ahc->sc_child_b = config_found((void *)&ahc->sc_dev,
&ahc->sc_channel, scsiprint);
}
ahc_intr_enable(ahc, TRUE);
if (ahc->flags & AHC_RESET_BUS_A)
ahc_reset_channel(ahc, 'A', TRUE);
if ((ahc->features & AHC_TWIN) && ahc->flags & AHC_RESET_BUS_B)
ahc_reset_channel(ahc, 'B', TRUE);
ahc_unlock(ahc, &s);
return (1);
}
/*
* Catch an interrupt from the adapter
*/
void
ahc_platform_intr(void *arg)
{
struct ahc_softc *ahc;
ahc = (struct ahc_softc *)arg;
ahc_intr(ahc);
}
/*
* We have an scb which has been processed by the
* adaptor, now we look to see how the operation
* went.
*/
void
ahc_done(struct ahc_softc *ahc, struct scb *scb)
{
struct scsipi_xfer *xs;
struct scsipi_periph *periph;
u_long s;
xs = scb->xs;
periph = xs->xs_periph;
LIST_REMOVE(scb, pending_links);
if ((scb->flags & SCB_UNTAGGEDQ) != 0) {
struct scb_tailq *untagged_q;
int target_offset;
target_offset = SCB_GET_TARGET_OFFSET(ahc, scb);
untagged_q = &ahc->untagged_queues[target_offset];
TAILQ_REMOVE(untagged_q, scb, links.tqe);
scb->flags &= ~SCB_UNTAGGEDQ;
ahc_run_untagged_queue(ahc, untagged_q);
}
callout_stop(&scb->xs->xs_callout);
if (xs->datalen) {
int op;
if (xs->xs_control & XS_CTL_DATA_IN)
op = BUS_DMASYNC_POSTREAD;
else
op = BUS_DMASYNC_POSTWRITE;
bus_dmamap_sync(ahc->parent_dmat, scb->dmamap, 0,
scb->dmamap->dm_mapsize, op);
bus_dmamap_unload(ahc->parent_dmat, scb->dmamap);
}
/*
* If the recovery SCB completes, we have to be
* out of our timeout.
*/
if ((scb->flags & SCB_RECOVERY_SCB) != 0) {
struct scb *list_scb;
/*
* We were able to complete the command successfully,
* so reinstate the timeouts for all other pending
* commands.
*/
LIST_FOREACH(list_scb, &ahc->pending_scbs, pending_links) {
struct scsipi_xfer *xs = list_scb->xs;
if (!(xs->xs_control & XS_CTL_POLL)) {
callout_reset(&list_scb->xs->xs_callout,
(list_scb->xs->timeout > 1000000) ?
(list_scb->xs->timeout / 1000) * hz :
(list_scb->xs->timeout * hz) / 1000,
ahc_timeout, list_scb);
}
}
if (ahc_get_transaction_status(scb) == CAM_BDR_SENT
|| ahc_get_transaction_status(scb) == CAM_REQ_ABORTED)
ahc_set_transaction_status(scb, CAM_CMD_TIMEOUT);
scsipi_printaddr(xs->xs_periph);
printf("%s: no longer in timeout, status = %x\n",
ahc_name(ahc), xs->status);
}
/* Don't clobber any existing error state */
if (xs->error != XS_NOERROR) {
/* Don't clobber any existing error state */
} else if ((scb->flags & SCB_SENSE) != 0) {
/*
* We performed autosense retrieval.
*
* Zero any sense not transferred by the
* device. The SCSI spec mandates that any
* untransferred data should be assumed to be
* zero. Complete the 'bounce' of sense information
* through buffers accessible via bus-space by
* copying it into the clients csio.
*/
memset(&xs->sense.scsi_sense, 0, sizeof(xs->sense.scsi_sense));
memcpy(&xs->sense.scsi_sense,
ahc_get_sense_buf(ahc, scb),
sizeof(xs->sense.scsi_sense));
xs->error = XS_SENSE;
}
if (scb->flags & SCB_FREEZE_QUEUE) {
scsipi_periph_thaw(periph, 1);
scb->flags &= ~SCB_FREEZE_QUEUE;
}
ahc_lock(ahc, &s);
ahc_free_scb(ahc, scb);
ahc_unlock(ahc, &s);
scsipi_done(xs);
}
static int
ahc_ioctl(struct scsipi_channel *channel, u_long cmd, caddr_t addr, int flag,
struct proc *p)
{
struct ahc_softc *ahc = (void *)channel->chan_adapter->adapt_dev;
int s, ret = ENOTTY;
switch (cmd) {
case SCBUSIORESET:
s = splbio();
ahc_reset_channel(ahc, channel->chan_channel == 1 ? 'B' : 'A',
TRUE);
splx(s);
ret = 0;
break;
default:
break;
}
return ret;
}
static void
ahc_action(struct scsipi_channel *chan, scsipi_adapter_req_t req, void *arg)
{
struct ahc_softc *ahc;
int s;
struct ahc_initiator_tinfo *tinfo;
struct ahc_tmode_tstate *tstate;
ahc = (void *)chan->chan_adapter->adapt_dev;
switch (req) {
case ADAPTER_REQ_RUN_XFER:
{
struct scsipi_xfer *xs;
struct scsipi_periph *periph;
struct scb *scb;
struct hardware_scb *hscb;
u_int target_id;
u_int our_id;
u_long s;
xs = arg;
periph = xs->xs_periph;
target_id = periph->periph_target;
our_id = ahc->our_id;
SC_DEBUG(xs->xs_periph, SCSIPI_DB3, ("ahc_action\n"));
/*
* get an scb to use.
*/
ahc_lock(ahc, &s);
if ((scb = ahc_get_scb(ahc)) == NULL) {
xs->error = XS_RESOURCE_SHORTAGE;
ahc_unlock(ahc, &s);
scsipi_done(xs);
return;
}
ahc_unlock(ahc, &s);
hscb = scb->hscb;
SC_DEBUG(periph, SCSIPI_DB3, ("start scb(%p)\n", scb));
scb->xs = xs;
/*
* Put all the arguments for the xfer in the scb
*/
hscb->control = 0;
hscb->scsiid = BUILD_SCSIID(ahc, 0, target_id, our_id);
hscb->lun = periph->periph_lun;
if (xs->xs_control & XS_CTL_RESET) {
hscb->cdb_len = 0;
scb->flags |= SCB_DEVICE_RESET;
hscb->control |= MK_MESSAGE;
ahc_execute_scb(scb, NULL, 0);
}
ahc_setup_data(ahc, xs, scb);
break;
}
case ADAPTER_REQ_GROW_RESOURCES:
printf("%s: ADAPTER_REQ_GROW_RESOURCES\n", ahc_name(ahc));
return;
case ADAPTER_REQ_SET_XFER_MODE:
{
struct scsipi_xfer_mode *xm = arg;
struct ahc_devinfo devinfo;
int target_id, our_id, first;
u_int width;
char channel;
u_int ppr_options, period, offset;
struct ahc_syncrate *syncrate;
uint16_t old_autoneg;
target_id = xm->xm_target;
our_id = chan->chan_id;
channel = (chan->chan_channel == 1) ? 'B' : 'A';
s = splbio();
tinfo = ahc_fetch_transinfo(ahc, channel, our_id, target_id,
&tstate);
ahc_compile_devinfo(&devinfo, our_id, target_id,
0, channel, ROLE_INITIATOR);
old_autoneg = tstate->auto_negotiate;
/*
* XXX since the period and offset are not provided here,
* fake things by forcing a renegotiation using the user
* settings if this is called for the first time (i.e.
* during probe). Also, cap various values at the user
* values, assuming that the user set it up that way.
*/
if (ahc->inited_target[target_id] == 0) {
period = tinfo->user.period;
offset = tinfo->user.offset;
ppr_options = tinfo->user.ppr_options;
width = tinfo->user.width;
tstate->tagenable |=
(ahc->user_tagenable & devinfo.target_mask);
tstate->discenable |=
(ahc->user_discenable & devinfo.target_mask);
ahc->inited_target[target_id] = 1;
first = 1;
} else
first = 0;
if (xm->xm_mode & (PERIPH_CAP_WIDE16 | PERIPH_CAP_DT))
width = MSG_EXT_WDTR_BUS_16_BIT;
else
width = MSG_EXT_WDTR_BUS_8_BIT;
ahc_validate_width(ahc, NULL, &width, ROLE_UNKNOWN);
if (width > tinfo->user.width)
width = tinfo->user.width;
ahc_set_width(ahc, &devinfo, width, AHC_TRANS_GOAL, FALSE);
if (!(xm->xm_mode & (PERIPH_CAP_SYNC | PERIPH_CAP_DT))) {
period = 0;
offset = 0;
ppr_options = 0;
}
if ((xm->xm_mode & PERIPH_CAP_DT) &&
(ppr_options & MSG_EXT_PPR_DT_REQ))
ppr_options |= MSG_EXT_PPR_DT_REQ;
else
ppr_options &= ~MSG_EXT_PPR_DT_REQ;
if ((tstate->discenable & devinfo.target_mask) == 0 ||
(tstate->tagenable & devinfo.target_mask) == 0)
ppr_options &= ~MSG_EXT_PPR_IU_REQ;
if ((xm->xm_mode & PERIPH_CAP_TQING) &&
(ahc->user_tagenable & devinfo.target_mask))
tstate->tagenable |= devinfo.target_mask;
else
tstate->tagenable &= ~devinfo.target_mask;
syncrate = ahc_find_syncrate(ahc, &period, &ppr_options,
AHC_SYNCRATE_MAX);
ahc_validate_offset(ahc, NULL, syncrate, &offset,
width, ROLE_UNKNOWN);
if (offset == 0) {
period = 0;
ppr_options = 0;
}
if (ppr_options != 0
&& tinfo->user.transport_version >= 3) {
tinfo->goal.transport_version =
tinfo->user.transport_version;
tinfo->curr.transport_version =
tinfo->user.transport_version;
}
ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset,
ppr_options, AHC_TRANS_GOAL, FALSE);
/*
* If this is the first request, and no negotiation is
* needed, just confirm the state to the scsipi layer,
* so that it can print a message.
*/
if (old_autoneg == tstate->auto_negotiate && first) {
xm->xm_mode = 0;
xm->xm_period = tinfo->curr.period;
xm->xm_offset = tinfo->curr.offset;
if (tinfo->curr.width == MSG_EXT_WDTR_BUS_16_BIT)
xm->xm_mode |= PERIPH_CAP_WIDE16;
if (tinfo->curr.period)
xm->xm_mode |= PERIPH_CAP_SYNC;
if (tstate->tagenable & devinfo.target_mask)
xm->xm_mode |= PERIPH_CAP_TQING;
if (tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ)
xm->xm_mode |= PERIPH_CAP_DT;
scsipi_async_event(chan, ASYNC_EVENT_XFER_MODE, xm);
}
splx(s);
}
}
return;
}
static void
ahc_execute_scb(void *arg, bus_dma_segment_t *dm_segs, int nsegments)
{
struct scb *scb;
struct scsipi_xfer *xs;
struct ahc_softc *ahc;
struct ahc_initiator_tinfo *tinfo;
struct ahc_tmode_tstate *tstate;
u_int mask;
long s;
scb = (struct scb *)arg;
xs = scb->xs;
xs->error = 0;
xs->status = 0;
xs->xs_status = 0;
ahc = (void *)xs->xs_periph->periph_channel->chan_adapter->adapt_dev;
if (nsegments != 0) {
struct ahc_dma_seg *sg;
bus_dma_segment_t *end_seg;
int op;
end_seg = dm_segs + nsegments;
/* Copy the segments into our SG list */
sg = scb->sg_list;
while (dm_segs < end_seg) {
uint32_t len;
sg->addr = ahc_htole32(dm_segs->ds_addr);
len = dm_segs->ds_len
| ((dm_segs->ds_addr >> 8) & 0x7F000000);
sg->len = ahc_htole32(len);
sg++;
dm_segs++;
}
/*
* Note where to find the SG entries in bus space.
* We also set the full residual flag which the
* sequencer will clear as soon as a data transfer
* occurs.
*/
scb->hscb->sgptr = ahc_htole32(scb->sg_list_phys|SG_FULL_RESID);
if (xs->xs_control & XS_CTL_DATA_IN)
op = BUS_DMASYNC_PREREAD;
else
op = BUS_DMASYNC_PREWRITE;
bus_dmamap_sync(ahc->parent_dmat, scb->dmamap, 0,
scb->dmamap->dm_mapsize, op);
sg--;
sg->len |= ahc_htole32(AHC_DMA_LAST_SEG);
/* Copy the first SG into the "current" data pointer area */
scb->hscb->dataptr = scb->sg_list->addr;
scb->hscb->datacnt = scb->sg_list->len;
} else {
scb->hscb->sgptr = ahc_htole32(SG_LIST_NULL);
scb->hscb->dataptr = 0;
scb->hscb->datacnt = 0;
}
scb->sg_count = nsegments;
ahc_lock(ahc, &s);
/*
* Last time we need to check if this SCB needs to
* be aborted.
*/
if (xs->xs_status & XS_STS_DONE) {
if (nsegments != 0)
bus_dmamap_unload(ahc->buffer_dmat, scb->dmamap);
ahc_free_scb(ahc, scb);
ahc_unlock(ahc, &s);
scsipi_done(xs);
return;
}
tinfo = ahc_fetch_transinfo(ahc, ahc->channel,
SCSIID_OUR_ID(scb->hscb->scsiid),
SCSIID_TARGET(ahc, scb->hscb->scsiid),
&tstate);
mask = SCB_GET_TARGET_MASK(ahc, scb);
scb->hscb->scsirate = tinfo->scsirate;
scb->hscb->scsioffset = tinfo->curr.offset;
if ((tstate->ultraenb & mask) != 0)
scb->hscb->control |= ULTRAENB;
if ((tstate->discenable & mask) != 0)
scb->hscb->control |= DISCENB;
if (xs->xs_tag_type)
scb->hscb->control |= xs->xs_tag_type;
#if 1 /* This looks like it makes sense at first, but it can loop */
if ((xs->xs_control & XS_CTL_DISCOVERY) && (tinfo->goal.width == 0
&& tinfo->goal.offset == 0
&& tinfo->goal.ppr_options == 0)) {
scb->flags |= SCB_NEGOTIATE;
scb->hscb->control |= MK_MESSAGE;
} else
#endif
if ((tstate->auto_negotiate & mask) != 0) {
scb->flags |= SCB_AUTO_NEGOTIATE;
scb->hscb->control |= MK_MESSAGE;
}
LIST_INSERT_HEAD(&ahc->pending_scbs, scb, pending_links);
if (!(xs->xs_control & XS_CTL_POLL)) {
callout_reset(&scb->xs->xs_callout, xs->timeout > 1000000 ?
(xs->timeout / 1000) * hz : (xs->timeout * hz) / 1000,
ahc_timeout, scb);
}
/*
* We only allow one untagged transaction
* per target in the initiator role unless
* we are storing a full busy target *lun*
* table in SCB space.
*/
if ((scb->hscb->control & (TARGET_SCB|TAG_ENB)) == 0
&& (ahc->flags & AHC_SCB_BTT) == 0) {
struct scb_tailq *untagged_q;
int target_offset;
target_offset = SCB_GET_TARGET_OFFSET(ahc, scb);
untagged_q = &(ahc->untagged_queues[target_offset]);
TAILQ_INSERT_TAIL(untagged_q, scb, links.tqe);
scb->flags |= SCB_UNTAGGEDQ;
if (TAILQ_FIRST(untagged_q) != scb) {
ahc_unlock(ahc, &s);
return;
}
}
scb->flags |= SCB_ACTIVE;
if ((scb->flags & SCB_TARGET_IMMEDIATE) != 0) {
/* Define a mapping from our tag to the SCB. */
ahc->scb_data->scbindex[scb->hscb->tag] = scb;
ahc_pause(ahc);
if ((ahc->flags & AHC_PAGESCBS) == 0)
ahc_outb(ahc, SCBPTR, scb->hscb->tag);
ahc_outb(ahc, TARG_IMMEDIATE_SCB, scb->hscb->tag);
ahc_unpause(ahc);
} else {
ahc_queue_scb(ahc, scb);
}
if (!(xs->xs_control & XS_CTL_POLL)) {
ahc_unlock(ahc, &s);
return;
}
/*
* If we can't use interrupts, poll for completion
*/
SC_DEBUG(xs->xs_periph, SCSIPI_DB3, ("cmd_poll\n"));
do {
if (ahc_poll(ahc, xs->timeout)) {
if (!(xs->xs_control & XS_CTL_SILENT))
printf("cmd fail\n");
ahc_timeout(scb);
break;
}
} while (!(xs->xs_status & XS_STS_DONE));
ahc_unlock(ahc, &s);
return;
}
static int
ahc_poll(struct ahc_softc *ahc, int wait)
{
while (--wait) {
DELAY(1000);
if (ahc_inb(ahc, INTSTAT) & INT_PEND)
break;
}
if (wait == 0) {
printf("%s: board is not responding\n", ahc_name(ahc));
return (EIO);
}
ahc_intr((void *)ahc);
return (0);
}
static void
ahc_setup_data(struct ahc_softc *ahc, struct scsipi_xfer *xs,
struct scb *scb)
{
struct hardware_scb *hscb;
hscb = scb->hscb;
xs->resid = xs->status = 0;
hscb->cdb_len = xs->cmdlen;
if (hscb->cdb_len > sizeof(hscb->cdb32)) {
u_long s;
ahc_set_transaction_status(scb, CAM_REQ_INVALID);
ahc_lock(ahc, &s);
ahc_free_scb(ahc, scb);
ahc_unlock(ahc, &s);
scsipi_done(xs);
return;
}
if (hscb->cdb_len > 12) {
memcpy(hscb->cdb32, xs->cmd, hscb->cdb_len);
scb->flags |= SCB_CDB32_PTR;
} else {
memcpy(hscb->shared_data.cdb, xs->cmd, hscb->cdb_len);
}
/* Only use S/G if there is a transfer */
if (xs->datalen) {
int error;
error = bus_dmamap_load(ahc->parent_dmat,
scb->dmamap, xs->data,
xs->datalen, NULL,
((xs->xs_control & XS_CTL_NOSLEEP) ?
BUS_DMA_NOWAIT : BUS_DMA_WAITOK) |
BUS_DMA_STREAMING |
((xs->xs_control & XS_CTL_DATA_IN) ?
BUS_DMA_READ : BUS_DMA_WRITE));
if (error) {
#ifdef AHC_DEBUG
printf("%s: in ahc_setup_data(): bus_dmamap_load() "
"= %d\n",
ahc_name(ahc), error);
#endif
xs->error = XS_RESOURCE_SHORTAGE;
scsipi_done(xs);
return;
}
ahc_execute_scb(scb,
scb->dmamap->dm_segs,
scb->dmamap->dm_nsegs);
} else {
ahc_execute_scb(scb, NULL, 0);
}
}
static void
ahc_set_recoveryscb(struct ahc_softc *ahc, struct scb *scb) {
if ((scb->flags & SCB_RECOVERY_SCB) == 0) {
struct scb *list_scb;
scb->flags |= SCB_RECOVERY_SCB;
/*
* Take all queued, but not sent SCBs out of the equation.
* Also ensure that no new CCBs are queued to us while we
* try to fix this problem.
*/
scsipi_channel_freeze(&ahc->sc_channel, 1);
if (ahc->features & AHC_TWIN)
scsipi_channel_freeze(&ahc->sc_channel_b, 1);
/*
* Go through all of our pending SCBs and remove
* any scheduled timeouts for them. We will reschedule
* them after we've successfully fixed this problem.
*/
LIST_FOREACH(list_scb, &ahc->pending_scbs, pending_links) {
callout_stop(&list_scb->xs->xs_callout);
}
}
}
void
ahc_timeout(void *arg)
{
struct scb *scb;
struct ahc_softc *ahc;
long s;
int found;
u_int last_phase;
int target;
int lun;
int i;
char channel;
scb = (struct scb *)arg;
ahc = (struct ahc_softc *)scb->ahc_softc;
ahc_lock(ahc, &s);
ahc_pause_and_flushwork(ahc);
if ((scb->flags & SCB_ACTIVE) == 0) {
/* Previous timeout took care of me already */
printf("%s: Timedout SCB already complete. "
"Interrupts may not be functioning.\n", ahc_name(ahc));
ahc_unpause(ahc);
ahc_unlock(ahc, &s);
return;
}
target = SCB_GET_TARGET(ahc, scb);
channel = SCB_GET_CHANNEL(ahc, scb);
lun = SCB_GET_LUN(scb);
ahc_print_path(ahc, scb);
printf("SCB 0x%x - timed out\n", scb->hscb->tag);
ahc_dump_card_state(ahc);
last_phase = ahc_inb(ahc, LASTPHASE);
if (scb->sg_count > 0) {
for (i = 0; i < scb->sg_count; i++) {
printf("sg[%d] - Addr 0x%x : Length %d\n",
i,
scb->sg_list[i].addr,
scb->sg_list[i].len & AHC_SG_LEN_MASK);
}
}
if (scb->flags & (SCB_DEVICE_RESET|SCB_ABORT)) {
/*
* Been down this road before.
* Do a full bus reset.
*/
bus_reset:
ahc_set_transaction_status(scb, CAM_CMD_TIMEOUT);
found = ahc_reset_channel(ahc, channel, /*Initiate Reset*/TRUE);
printf("%s: Issued Channel %c Bus Reset. "
"%d SCBs aborted\n", ahc_name(ahc), channel, found);
} else {
/*
* If we are a target, transition to bus free and report
* the timeout.
*
* The target/initiator that is holding up the bus may not
* be the same as the one that triggered this timeout
* (different commands have different timeout lengths).
* If the bus is idle and we are acting as the initiator
* for this request, queue a BDR message to the timed out
* target. Otherwise, if the timed out transaction is
* active:
* Initiator transaction:
* Stuff the message buffer with a BDR message and assert
* ATN in the hopes that the target will let go of the bus
* and go to the mesgout phase. If this fails, we'll
* get another timeout 2 seconds later which will attempt
* a bus reset.
*
* Target transaction:
* Transition to BUS FREE and report the error.
* It's good to be the target!
*/
u_int active_scb_index;
u_int saved_scbptr;
saved_scbptr = ahc_inb(ahc, SCBPTR);
active_scb_index = ahc_inb(ahc, SCB_TAG);
if ((ahc_inb(ahc, SEQ_FLAGS) & NOT_IDENTIFIED) == 0
&& (active_scb_index < ahc->scb_data->numscbs)) {
struct scb *active_scb;
/*
* If the active SCB is not us, assume that
* the active SCB has a longer timeout than
* the timedout SCB, and wait for the active
* SCB to timeout.
*/
active_scb = ahc_lookup_scb(ahc, active_scb_index);
if (active_scb != scb) {
uint64_t newtimeout;
ahc_print_path(ahc, scb);
printf("Other SCB Timeout%s",
(scb->flags & SCB_OTHERTCL_TIMEOUT) != 0
? " again\n" : "\n");
scb->flags |= SCB_OTHERTCL_TIMEOUT;
newtimeout = MAX(active_scb->xs->timeout,
scb->xs->timeout);
callout_reset(&scb->xs->xs_callout,
newtimeout > 1000000 ?
(newtimeout / 1000) * hz :
(newtimeout * hz) / 1000,
ahc_timeout, scb);
ahc_unpause(ahc);
ahc_unlock(ahc, &s);
return;
}
/* It's us */
if ((scb->flags & SCB_TARGET_SCB) != 0) {
/*
* Send back any queued up transactions
* and properly record the error condition.
*/
ahc_abort_scbs(ahc, SCB_GET_TARGET(ahc, scb),
SCB_GET_CHANNEL(ahc, scb),
SCB_GET_LUN(scb),
scb->hscb->tag,
ROLE_TARGET,
CAM_CMD_TIMEOUT);
/* Will clear us from the bus */
ahc_restart(ahc);
ahc_unlock(ahc, &s);
return;
}
ahc_set_recoveryscb(ahc, active_scb);
ahc_outb(ahc, MSG_OUT, HOST_MSG);
ahc_outb(ahc, SCSISIGO, last_phase|ATNO);
ahc_print_path(ahc, active_scb);
printf("BDR message in message buffer\n");
active_scb->flags |= SCB_DEVICE_RESET;
callout_reset(&active_scb->xs->xs_callout,
2 * hz, ahc_timeout, active_scb);
ahc_unpause(ahc);
} else {
int disconnected;
/* XXX Shouldn't panic. Just punt instead? */
if ((scb->flags & SCB_TARGET_SCB) != 0)
panic("Timed-out target SCB but bus idle");
if (last_phase != P_BUSFREE
&& (ahc_inb(ahc, SSTAT0) & TARGET) != 0) {
/* XXX What happened to the SCB? */
/* Hung target selection. Goto busfree */
printf("%s: Hung target selection\n",
ahc_name(ahc));
ahc_restart(ahc);
ahc_unlock(ahc, &s);
return;
}
if (ahc_search_qinfifo(ahc, target, channel, lun,
scb->hscb->tag, ROLE_INITIATOR,
/*status*/0, SEARCH_COUNT) > 0) {
disconnected = FALSE;
} else {
disconnected = TRUE;
}
if (disconnected) {
ahc_set_recoveryscb(ahc, scb);
/*
* Actually re-queue this SCB in an attempt
* to select the device before it reconnects.
* In either case (selection or reselection),
* we will now issue a target reset to the
* timed-out device.
*
* Set the MK_MESSAGE control bit indicating
* that we desire to send a message. We
* also set the disconnected flag since
* in the paging case there is no guarantee
* that our SCB control byte matches the
* version on the card. We don't want the
* sequencer to abort the command thinking
* an unsolicited reselection occurred.
*/
scb->hscb->control |= MK_MESSAGE|DISCONNECTED;
scb->flags |= SCB_DEVICE_RESET;
/*
* Remove any cached copy of this SCB in the
* disconnected list in preparation for the
* queuing of our abort SCB. We use the
* same element in the SCB, SCB_NEXT, for
* both the qinfifo and the disconnected list.
*/
ahc_search_disc_list(ahc, target, channel,
lun, scb->hscb->tag,
/*stop_on_first*/TRUE,
/*remove*/TRUE,
/*save_state*/FALSE);
/*
* In the non-paging case, the sequencer will
* never re-reference the in-core SCB.
* To make sure we are notified during
* reslection, set the MK_MESSAGE flag in
* the card's copy of the SCB.
*/
if ((ahc->flags & AHC_PAGESCBS) == 0) {
ahc_outb(ahc, SCBPTR, scb->hscb->tag);
ahc_outb(ahc, SCB_CONTROL,
ahc_inb(ahc, SCB_CONTROL)
| MK_MESSAGE);
}
/*
* Clear out any entries in the QINFIFO first
* so we are the next SCB for this target
* to run.
*/
ahc_search_qinfifo(ahc,
SCB_GET_TARGET(ahc, scb),
channel, SCB_GET_LUN(scb),
SCB_LIST_NULL,
ROLE_INITIATOR,
CAM_REQUEUE_REQ,
SEARCH_COMPLETE);
ahc_print_path(ahc, scb);
printf("Queuing a BDR SCB\n");
ahc_qinfifo_requeue_tail(ahc, scb);
ahc_outb(ahc, SCBPTR, saved_scbptr);
callout_reset(&scb->xs->xs_callout, 2 * hz,
ahc_timeout, scb);
ahc_unpause(ahc);
} else {
/* Go "immediatly" to the bus reset */
/* This shouldn't happen */
ahc_set_recoveryscb(ahc, scb);
ahc_print_path(ahc, scb);
printf("SCB %d: Immediate reset. "
"Flags = 0x%x\n", scb->hscb->tag,
scb->flags);
goto bus_reset;
}
}
}
ahc_unlock(ahc, &s);
}
void
ahc_platform_set_tags(struct ahc_softc *ahc,
struct ahc_devinfo *devinfo, int enable)
{
struct ahc_tmode_tstate *tstate;
ahc_fetch_transinfo(ahc, devinfo->channel, devinfo->our_scsiid,
devinfo->target, &tstate);
if (enable)
tstate->tagenable |= devinfo->target_mask;
else
tstate->tagenable &= ~devinfo->target_mask;
}
int
ahc_platform_alloc(struct ahc_softc *ahc, void *platform_arg)
{
if (sizeof(struct ahc_platform_data) == 0)
return 0;
ahc->platform_data = malloc(sizeof(struct ahc_platform_data), M_DEVBUF,
M_NOWAIT);
if (ahc->platform_data == NULL)
return (ENOMEM);
return (0);
}
void
ahc_platform_free(struct ahc_softc *ahc)
{
if (sizeof(struct ahc_platform_data) == 0)
return;
free(ahc->platform_data, M_DEVBUF);
}
int
ahc_softc_comp(struct ahc_softc *lahc, struct ahc_softc *rahc)
{
return (0);
}
int
ahc_detach(struct device *self, int flags)
{
int rv = 0;
struct ahc_softc *ahc = (struct ahc_softc*)self;
ahc_intr_enable(ahc, FALSE);
if (ahc->sc_child != NULL)
rv = config_detach(ahc->sc_child, flags);
if (rv == 0 && ahc->sc_child_b != NULL)
rv = config_detach(ahc->sc_child_b, flags);
shutdownhook_disestablish(ahc->shutdown_hook);
ahc_free(ahc);
return (rv);
}
void
ahc_send_async(struct ahc_softc *ahc, char channel, u_int target, u_int lun,
ac_code code, void *opt_arg)
{
struct ahc_tmode_tstate *tstate;
struct ahc_initiator_tinfo *tinfo;
struct ahc_devinfo devinfo;
struct scsipi_channel *chan;
struct scsipi_xfer_mode xm;
chan = channel == 'B' ? &ahc->sc_channel_b : &ahc->sc_channel;
switch (code) {
case AC_TRANSFER_NEG:
tinfo = ahc_fetch_transinfo(ahc, channel, ahc->our_id, target,
&tstate);
ahc_compile_devinfo(&devinfo, ahc->our_id, target, lun,
channel, ROLE_UNKNOWN);
/*
* Don't bother if negotiating. XXX?
*/
if (tinfo->curr.period != tinfo->goal.period
|| tinfo->curr.width != tinfo->goal.width
|| tinfo->curr.offset != tinfo->goal.offset
|| tinfo->curr.ppr_options != tinfo->goal.ppr_options)
break;
xm.xm_target = target;
xm.xm_mode = 0;
xm.xm_period = tinfo->curr.period;
xm.xm_offset = tinfo->curr.offset;
if (tinfo->curr.width == MSG_EXT_WDTR_BUS_16_BIT)
xm.xm_mode |= PERIPH_CAP_WIDE16;
if (tinfo->curr.period)
xm.xm_mode |= PERIPH_CAP_SYNC;
if (tstate->tagenable & devinfo.target_mask)
xm.xm_mode |= PERIPH_CAP_TQING;
if (tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ)
xm.xm_mode |= PERIPH_CAP_DT;
scsipi_async_event(chan, ASYNC_EVENT_XFER_MODE, &xm);
break;
case AC_BUS_RESET:
scsipi_async_event(chan, ASYNC_EVENT_RESET, NULL);
case AC_SENT_BDR:
default:
break;
}
}
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