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NetBSD/sys/dev/ic/adw.c

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/* $NetBSD: adw.c,v 1.1 1998/09/26 16:10:40 dante Exp $ */
/*
* Generic driver for the Advanced Systems Inc. SCSI controllers
*
* Copyright (c) 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
* Author: Baldassare Dante Profeta <dante@mclink.it>
*
* 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.
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/
#include <sys/types.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/errno.h>
#include <sys/ioctl.h>
#include <sys/device.h>
#include <sys/malloc.h>
#include <sys/buf.h>
#include <sys/proc.h>
#include <sys/user.h>
#include <machine/bus.h>
#include <machine/intr.h>
#include <vm/vm.h>
#include <vm/vm_param.h>
#include <vm/pmap.h>
#include <dev/scsipi/scsi_all.h>
#include <dev/scsipi/scsipi_all.h>
#include <dev/scsipi/scsiconf.h>
#include <dev/ic/adwlib.h>
#include <dev/ic/adw.h>
#ifndef DDB
#define Debugger() panic("should call debugger here (adv.c)")
#endif /* ! DDB */
/******************************************************************************/
static void adw_enqueue __P((ADW_SOFTC *, struct scsipi_xfer *, int));
static struct scsipi_xfer *adw_dequeue __P((ADW_SOFTC *));
static int adw_alloc_ccbs __P((ADW_SOFTC *));
static int adw_create_ccbs __P((ADW_SOFTC *, ADW_CCB *, int));
static void adw_free_ccb __P((ADW_SOFTC *, ADW_CCB *));
static void adw_reset_ccb __P((ADW_CCB *));
static int adw_init_ccb __P((ADW_SOFTC *, ADW_CCB *));
static ADW_CCB *adw_get_ccb __P((ADW_SOFTC *, int));
static void adw_queue_ccb __P((ADW_SOFTC *, ADW_CCB *));
static void adw_start_ccbs __P((ADW_SOFTC *));
static int adw_scsi_cmd __P((struct scsipi_xfer *));
static int adw_build_req __P((struct scsipi_xfer *, ADW_CCB *));
static void adw_build_sglist __P(( ADW_CCB *, ADW_SCSI_REQ_Q *));
static void adwminphys __P((struct buf *));
static void adw_wide_isr_callback __P((ADW_SOFTC *, ADW_SCSI_REQ_Q *));
static int adw_poll __P((ADW_SOFTC *, struct scsipi_xfer *, int));
static void adw_timeout __P((void *));
static void adw_watchdog __P((void *));
/******************************************************************************/
struct scsipi_adapter adw_switch =
{
adw_scsi_cmd, /* called to start/enqueue a SCSI command */
adwminphys, /* to limit the transfer to max device can do */
0, /* IT SEEMS IT IS NOT USED YET */
0, /* as above... */
};
/* the below structure is so we have a default dev struct for out link struct */
struct scsipi_device adw_dev =
{
NULL, /* Use default error handler */
NULL, /* have a queue, served by this */
NULL, /* have no async handler */
NULL, /* Use default 'done' routine */
};
#define ADW_ABORT_TIMEOUT 10000 /* time to wait for abort (mSec) */
#define ADW_WATCH_TIMEOUT 10000 /* time to wait for watchdog (mSec) */
/******************************************************************************/
/* scsipi_xfer queue routines */
/******************************************************************************/
/*
* Insert a scsipi_xfer into the software queue. We overload xs->free_list
* to avoid having to allocate additional resources (since we're used
* only during resource shortages anyhow.
*/
static void
adw_enqueue(sc, xs, infront)
ADW_SOFTC *sc;
struct scsipi_xfer *xs;
int infront;
{
if (infront || sc->sc_queue.lh_first == NULL) {
if (sc->sc_queue.lh_first == NULL)
sc->sc_queuelast = xs;
LIST_INSERT_HEAD(&sc->sc_queue, xs, free_list);
return;
}
LIST_INSERT_AFTER(sc->sc_queuelast, xs, free_list);
sc->sc_queuelast = xs;
}
/*
* Pull a scsipi_xfer off the front of the software queue.
*/
static struct scsipi_xfer *
adw_dequeue(sc)
ADW_SOFTC *sc;
{
struct scsipi_xfer *xs;
xs = sc->sc_queue.lh_first;
LIST_REMOVE(xs, free_list);
if (sc->sc_queue.lh_first == NULL)
sc->sc_queuelast = NULL;
return (xs);
}
/******************************************************************************/
/* Control Blocks routines */
/******************************************************************************/
static int
adw_alloc_ccbs(sc)
ADW_SOFTC *sc;
{
bus_dma_segment_t seg;
int error, rseg;
/*
* Allocate the control blocks.
*/
if ((error = bus_dmamem_alloc(sc->sc_dmat, sizeof(struct adw_control),
NBPG, 0, &seg, 1, &rseg, BUS_DMA_NOWAIT)) != 0) {
printf("%s: unable to allocate control structures,"
" error = %d\n", sc->sc_dev.dv_xname, error);
return (error);
}
if ((error = bus_dmamem_map(sc->sc_dmat, &seg, rseg,
sizeof(struct adw_control), (caddr_t *) & sc->sc_control,
BUS_DMA_NOWAIT | BUS_DMA_COHERENT)) != 0) {
printf("%s: unable to map control structures, error = %d\n",
sc->sc_dev.dv_xname, error);
return (error);
}
/*
* Create and load the DMA map used for the control blocks.
*/
if ((error = bus_dmamap_create(sc->sc_dmat, sizeof(struct adw_control),
1, sizeof(struct adw_control), 0, BUS_DMA_NOWAIT,
&sc->sc_dmamap_control)) != 0) {
printf("%s: unable to create control DMA map, error = %d\n",
sc->sc_dev.dv_xname, error);
return (error);
}
if ((error = bus_dmamap_load(sc->sc_dmat, sc->sc_dmamap_control,
sc->sc_control, sizeof(struct adw_control), NULL,
BUS_DMA_NOWAIT)) != 0) {
printf("%s: unable to load control DMA map, error = %d\n",
sc->sc_dev.dv_xname, error);
return (error);
}
return (0);
}
/*
* Create a set of ccbs and add them to the free list. Called once
* by adw_init(). We return the number of CCBs successfully created.
*/
static int
adw_create_ccbs(sc, ccbstore, count)
ADW_SOFTC *sc;
ADW_CCB *ccbstore;
int count;
{
ADW_CCB *ccb;
int i, error;
bzero(ccbstore, sizeof(ADW_CCB) * count);
for (i = 0; i < count; i++) {
ccb = &ccbstore[i];
if ((error = adw_init_ccb(sc, ccb)) != 0) {
printf("%s: unable to initialize ccb, error = %d\n",
sc->sc_dev.dv_xname, error);
return (i);
}
TAILQ_INSERT_TAIL(&sc->sc_free_ccb, ccb, chain);
}
return (i);
}
/*
* A ccb is put onto the free list.
*/
static void
adw_free_ccb(sc, ccb)
ADW_SOFTC *sc;
ADW_CCB *ccb;
{
int s;
s = splbio();
adw_reset_ccb(ccb);
TAILQ_INSERT_HEAD(&sc->sc_free_ccb, ccb, chain);
/*
* If there were none, wake anybody waiting for one to come free,
* starting with queued entries.
*/
if (ccb->chain.tqe_next == 0)
wakeup(&sc->sc_free_ccb);
splx(s);
}
static void
adw_reset_ccb(ccb)
ADW_CCB *ccb;
{
ccb->flags = 0;
}
static int
adw_init_ccb(sc, ccb)
ADW_SOFTC *sc;
ADW_CCB *ccb;
{
int error;
/*
* Create the DMA map for this CCB.
*/
error = bus_dmamap_create(sc->sc_dmat,
(ADW_MAX_SG_LIST - 1) * PAGE_SIZE,
ADW_MAX_SG_LIST, (ADW_MAX_SG_LIST - 1) * PAGE_SIZE,
0, BUS_DMA_NOWAIT | BUS_DMA_ALLOCNOW, &ccb->dmamap_xfer);
if (error) {
printf("%s: unable to create DMA map, error = %d\n",
sc->sc_dev.dv_xname, error);
return (error);
}
adw_reset_ccb(ccb);
return (0);
}
/*
* Get a free ccb
*
* If there are none, see if we can allocate a new one
*/
static ADW_CCB *
adw_get_ccb(sc, flags)
ADW_SOFTC *sc;
int flags;
{
ADW_CCB *ccb = 0;
int s;
s = splbio();
/*
* If we can and have to, sleep waiting for one to come free
* but only if we can't allocate a new one.
*/
for (;;) {
ccb = sc->sc_free_ccb.tqh_first;
if (ccb) {
TAILQ_REMOVE(&sc->sc_free_ccb, ccb, chain);
break;
}
if ((flags & SCSI_NOSLEEP) != 0)
goto out;
tsleep(&sc->sc_free_ccb, PRIBIO, "adwccb", 0);
}
ccb->flags |= CCB_ALLOC;
out:
splx(s);
return (ccb);
}
/*
* Queue a CCB to be sent to the controller, and send it if possible.
*/
static void
adw_queue_ccb(sc, ccb)
ADW_SOFTC *sc;
ADW_CCB *ccb;
{
TAILQ_INSERT_TAIL(&sc->sc_waiting_ccb, ccb, chain);
adw_start_ccbs(sc);
}
static void
adw_start_ccbs(sc)
ADW_SOFTC *sc;
{
ADW_CCB *ccb;
while ((ccb = sc->sc_waiting_ccb.tqh_first) != NULL) {
if (ccb->flags & CCB_WATCHDOG)
untimeout(adw_watchdog, ccb);
if (AdvExeScsiQueue(sc, &ccb->scsiq) == ADW_BUSY) {
ccb->flags |= CCB_WATCHDOG;
timeout(adw_watchdog, ccb,
(ADW_WATCH_TIMEOUT * hz) / 1000);
break;
}
TAILQ_REMOVE(&sc->sc_waiting_ccb, ccb, chain);
if ((ccb->xs->flags & SCSI_POLL) == 0)
timeout(adw_timeout, ccb, (ccb->timeout * hz) / 1000);
}
}
/******************************************************************************/
/* SCSI layer interfacing routines */
/******************************************************************************/
int
adw_init(sc)
ADW_SOFTC *sc;
{
u_int16_t warn_code;
sc->cfg.lib_version = (ADW_LIB_VERSION_MAJOR << 8) |
ADW_LIB_VERSION_MINOR;
sc->cfg.chip_version =
ADW_GET_CHIP_VERSION(sc->sc_iot, sc->sc_ioh, sc->bus_type);
/*
* Reset the chip to start and allow register writes.
*/
if (ADW_FIND_SIGNATURE(sc->sc_iot, sc->sc_ioh) == 0) {
panic("adw_init: adw_find_signature failed");
}
else
{
AdvResetChip(sc->sc_iot, sc->sc_ioh);
warn_code = AdvInitFromEEP(sc);
if(warn_code & ASC_WARN_EEPROM_CHKSUM)
printf("%s: Bad checksum found. "
"Setting default values\n",
sc->sc_dev.dv_xname);
if(warn_code & ASC_WARN_EEPROM_TERMINATION)
printf("%s: Bad bus termination setting."
"Using automatic termination.\n",
sc->sc_dev.dv_xname);
/*
* Reset the SCSI Bus if the EEPROM indicates that SCSI Bus
* Resets should be performed.
*/
if (sc->bios_ctrl & BIOS_CTRL_RESET_SCSI_BUS)
AdvResetSCSIBus(sc);
}
sc->isr_callback = (ulong) adw_wide_isr_callback;
return (0);
}
void
adw_attach(sc)
ADW_SOFTC *sc;
{
int i, error;
/*
* Initialize the ASC3550.
*/
switch(AdvInitAsc3550Driver(sc))
{
case ASC_IERR_MCODE_CHKSUM:
panic("%s: Microcode checksum error",
sc->sc_dev.dv_xname);
break;
case ASC_IERR_ILLEGAL_CONNECTION:
panic("%s: All three connectors are in use",
sc->sc_dev.dv_xname);
break;
case ASC_IERR_REVERSED_CABLE:
panic("%s: Cable is reversed",
sc->sc_dev.dv_xname);
break;
case ASC_IERR_SINGLE_END_DEVICE:
panic("%s: single-ended device is attached to"
" one of the connectors",
sc->sc_dev.dv_xname);
break;
}
/*
* fill in the prototype scsipi_link.
*/
sc->sc_link.scsipi_scsi.channel = SCSI_CHANNEL_ONLY_ONE;
sc->sc_link.adapter_softc = sc;
sc->sc_link.scsipi_scsi.adapter_target = sc->chip_scsi_id;
sc->sc_link.adapter = &adw_switch;
sc->sc_link.device = &adw_dev;
sc->sc_link.openings = 4;
sc->sc_link.scsipi_scsi.max_target = ADW_MAX_TID;
sc->sc_link.type = BUS_SCSI;
TAILQ_INIT(&sc->sc_free_ccb);
TAILQ_INIT(&sc->sc_waiting_ccb);
LIST_INIT(&sc->sc_queue);
/*
* Allocate the Control Blocks.
*/
error = adw_alloc_ccbs(sc);
if (error)
return; /* (error) */ ;
/*
* Create and initialize the Control Blocks.
*/
i = adw_create_ccbs(sc, sc->sc_control->ccbs, ADW_MAX_CCB);
if (i == 0) {
printf("%s: unable to create control blocks\n",
sc->sc_dev.dv_xname);
return; /* (ENOMEM) */ ;
} else if (i != ADW_MAX_CCB) {
printf("%s: WARNING: only %d of %d control blocks"
" created\n",
sc->sc_dev.dv_xname, i, ADW_MAX_CCB);
}
config_found(&sc->sc_dev, &sc->sc_link, scsiprint);
}
static void
adwminphys(bp)
struct buf *bp;
{
if (bp->b_bcount > ((ADW_MAX_SG_LIST - 1) * PAGE_SIZE))
bp->b_bcount = ((ADW_MAX_SG_LIST - 1) * PAGE_SIZE);
minphys(bp);
}
/*
* start a scsi operation given the command and the data address. Also needs
* the unit, target and lu.
*/
static int
adw_scsi_cmd(xs)
struct scsipi_xfer *xs;
{
struct scsipi_link *sc_link = xs->sc_link;
ADW_SOFTC *sc = sc_link->adapter_softc;
ADW_CCB *ccb;
int s, fromqueue = 1, dontqueue = 0;
s = splbio(); /* protect the queue */
/*
* If we're running the queue from adw_done(), we've been
* called with the first queue entry as our argument.
*/
if (xs == sc->sc_queue.lh_first) {
xs = adw_dequeue(sc);
fromqueue = 1;
} else {
/* Polled requests can't be queued for later. */
dontqueue = xs->flags & SCSI_POLL;
/*
* If there are jobs in the queue, run them first.
*/
if (sc->sc_queue.lh_first != NULL) {
/*
* If we can't queue, we have to abort, since
* we have to preserve order.
*/
if (dontqueue) {
splx(s);
xs->error = XS_DRIVER_STUFFUP;
return (TRY_AGAIN_LATER);
}
/*
* Swap with the first queue entry.
*/
adw_enqueue(sc, xs, 0);
xs = adw_dequeue(sc);
fromqueue = 1;
}
}
/*
* get a ccb to use. If the transfer
* is from a buf (possibly from interrupt time)
* then we can't allow it to sleep
*/
if ((ccb = adw_get_ccb(sc, xs->flags)) == NULL) {
/*
* If we can't queue, we lose.
*/
if (dontqueue) {
splx(s);
xs->error = XS_DRIVER_STUFFUP;
return (TRY_AGAIN_LATER);
}
/*
* Stuff ourselves into the queue, in front
* if we came off in the first place.
*/
adw_enqueue(sc, xs, fromqueue);
splx(s);
return (SUCCESSFULLY_QUEUED);
}
splx(s); /* done playing with the queue */
ccb->xs = xs;
ccb->timeout = xs->timeout;
if(adw_build_req(xs, ccb))
{
s = splbio();
adw_queue_ccb(sc, ccb);
splx(s);
/*
* Usually return SUCCESSFULLY QUEUED
*/
if ((xs->flags & SCSI_POLL) == 0)
return (SUCCESSFULLY_QUEUED);
/*
* If we can't use interrupts, poll on completion
*/
if (adw_poll(sc, xs, ccb->timeout)) {
adw_timeout(ccb);
if (adw_poll(sc, xs, ccb->timeout))
adw_timeout(ccb);
}
}
return (COMPLETE);
}
/*
* Build a request structure for the Wide Boards.
*/
static int
adw_build_req(xs, ccb)
struct scsipi_xfer *xs;
ADW_CCB *ccb;
{
struct scsipi_link *sc_link = xs->sc_link;
ADW_SOFTC *sc = sc_link->adapter_softc;
bus_dma_tag_t dmat = sc->sc_dmat;
ADW_SCSI_REQ_Q *scsiqp;
int error;
scsiqp = &ccb->scsiq;
bzero(scsiqp, sizeof(ADW_SCSI_REQ_Q));
/*
* Set the ADW_SCSI_REQ_Q 'ccb_ptr' to point to the CCB structure.
*/
scsiqp->ccb_ptr = (ulong) ccb;
/*
* Build the ADW_SCSI_REQ_Q request.
*/
/*
* Set CDB length and copy it to the request structure.
*/
bcopy(xs->cmd, &scsiqp->cdb, scsiqp->cdb_len = xs->cmdlen);
scsiqp->target_id = sc_link->scsipi_scsi.target;
scsiqp->target_lun = sc_link->scsipi_scsi.lun;
scsiqp->vsense_addr = (ulong) &ccb->scsi_sense;
scsiqp->sense_addr = sc->sc_dmamap_control->dm_segs[0].ds_addr +
ADW_CCB_OFF(ccb) + offsetof(struct adw_ccb, scsi_sense);
scsiqp->sense_len = sizeof(struct scsipi_sense_data);
/*
* Build ADW_SCSI_REQ_Q for a scatter-gather buffer command.
*/
if (xs->datalen) {
/*
* Map the DMA transfer.
*/
#ifdef TFS
if (xs->flags & SCSI_DATA_UIO) {
error = bus_dmamap_load_uio(dmat,
ccb->dmamap_xfer, (struct uio *) xs->data,
(xs->flags & SCSI_NOSLEEP) ? BUS_DMA_NOWAIT : BUS_DMA_WAITOK);
} else
#endif /* TFS */
{
error = bus_dmamap_load(dmat,
ccb->dmamap_xfer, xs->data, xs->datalen, NULL,
(xs->flags & SCSI_NOSLEEP) ? BUS_DMA_NOWAIT : BUS_DMA_WAITOK);
}
if (error) {
if (error == EFBIG) {
printf("%s: adw_scsi_cmd, more than %d dma"
" segments\n",
sc->sc_dev.dv_xname, ADW_MAX_SG_LIST);
} else {
printf("%s: adw_scsi_cmd, error %d loading"
" dma map\n",
sc->sc_dev.dv_xname, error);
}
xs->error = XS_DRIVER_STUFFUP;
adw_free_ccb(sc, ccb);
return (0);
}
bus_dmamap_sync(dmat, ccb->dmamap_xfer, 0,
ccb->dmamap_xfer->dm_mapsize,
(xs->flags & SCSI_DATA_IN) ? BUS_DMASYNC_PREREAD :
BUS_DMASYNC_PREWRITE);
/*
* Build scatter-gather list.
*/
scsiqp->data_cnt = xs->datalen;
scsiqp->vdata_addr = (ulong) xs->data;
scsiqp->data_addr = ccb->dmamap_xfer->dm_segs[0].ds_addr;
scsiqp->sg_list_ptr = &ccb->sg_block[0];
bzero(scsiqp->sg_list_ptr, sizeof(ADW_SG_BLOCK) * ADW_NUM_SG_BLOCK);
adw_build_sglist(ccb, scsiqp);
} else {
/*
* No data xfer, use non S/G values.
*/
scsiqp->data_cnt = 0;
scsiqp->vdata_addr = 0;
scsiqp->data_addr = 0;
scsiqp->sg_list_ptr = NULL;
}
return (1);
}
/*
* Build scatter-gather list for Wide Boards.
*/
static void
adw_build_sglist(ccb, scsiqp)
ADW_CCB *ccb;
ADW_SCSI_REQ_Q *scsiqp;
{
struct scsipi_xfer *xs = ccb->xs;
ADW_SOFTC *sc = xs->sc_link->adapter_softc;
ADW_SG_BLOCK *sg_block = scsiqp->sg_list_ptr;
ulong sg_block_next_addr; /* block and its next */
ulong sg_block_physical_addr;
int sg_block_index, i; /* how many SG entries */
bus_dma_segment_t *sg_list = &ccb->dmamap_xfer->dm_segs[0];
int sg_elem_cnt = ccb->dmamap_xfer->dm_nsegs;
sg_block_next_addr = (ulong) sg_block; /* allow math operation */
sg_block_physical_addr = sc->sc_dmamap_control->dm_segs[0].ds_addr +
ADW_CCB_OFF(ccb) + offsetof(struct adw_ccb, sg_block[0]);
scsiqp->sg_real_addr = sg_block_physical_addr;
/*
* If there are more than NO_OF_SG_PER_BLOCK dma segments (hw sg-list)
* then split the request into multiple sg-list blocks.
*/
sg_block_index = 0;
do
{
sg_block->first_entry_no = sg_block_index;
for (i = 0; i < NO_OF_SG_PER_BLOCK; i++)
{
sg_block->sg_list[i].sg_addr = sg_list->ds_addr;
sg_block->sg_list[i].sg_count = sg_list->ds_len;
if (--sg_elem_cnt == 0)
{
/* last entry, get out */
scsiqp->sg_entry_cnt = sg_block_index + i + 1;
sg_block->last_entry_no = sg_block_index + i;
sg_block->sg_ptr = NULL;/* next link = NULL */
return;
}
sg_list++;
}
sg_block_next_addr += sizeof(ADW_SG_BLOCK);
sg_block_physical_addr += sizeof(ADW_SG_BLOCK);
sg_block_index += NO_OF_SG_PER_BLOCK;
sg_block->sg_ptr = (ADW_SG_BLOCK *) sg_block_physical_addr;
sg_block->last_entry_no = sg_block_index - 1;
sg_block = (ADW_SG_BLOCK *) sg_block_next_addr; /* virtual addr */
}
while (1);
}
int
adw_intr(arg)
void *arg;
{
ADW_SOFTC *sc = arg;
struct scsipi_xfer *xs;
AdvISR(sc);
/*
* If there are queue entries in the software queue, try to
* run the first one. We should be more or less guaranteed
* to succeed, since we just freed a CCB.
*
* NOTE: adw_scsi_cmd() relies on our calling it with
* the first entry in the queue.
*/
if ((xs = sc->sc_queue.lh_first) != NULL)
(void) adw_scsi_cmd(xs);
return (1);
}
/*
* Poll a particular unit, looking for a particular xs
*/
static int
adw_poll(sc, xs, count)
ADW_SOFTC *sc;
struct scsipi_xfer *xs;
int count;
{
/* timeouts are in msec, so we loop in 1000 usec cycles */
while (count) {
adw_intr(sc);
if (xs->flags & ITSDONE)
return (0);
delay(1000); /* only happens in boot so ok */
count--;
}
return (1);
}
static void
adw_timeout(arg)
void *arg;
{
ADW_CCB *ccb = arg;
struct scsipi_xfer *xs = ccb->xs;
struct scsipi_link *sc_link = xs->sc_link;
ADW_SOFTC *sc = sc_link->adapter_softc;
int s;
scsi_print_addr(sc_link);
printf("timed out");
s = splbio();
/*
* If it has been through before, then a previous abort has failed,
* don't try abort again, reset the bus instead.
*/
if (ccb->flags & CCB_ABORT) {
/* abort timed out */
printf(" AGAIN. Resetting Bus\n");
/* Lets try resetting the bus! */
AdvResetSCSIBus(sc);
ccb->timeout = ADW_ABORT_TIMEOUT;
adw_queue_ccb(sc, ccb);
} else {
/* abort the operation that has timed out */
printf("\n");
ADW_ABORT_CCB(sc, ccb);
xs->error = XS_TIMEOUT;
ccb->timeout = ADW_ABORT_TIMEOUT;
ccb->flags |= CCB_ABORT;
adw_queue_ccb(sc, ccb);
}
splx(s);
}
static void
adw_watchdog(arg)
void *arg;
{
ADW_CCB *ccb = arg;
struct scsipi_xfer *xs = ccb->xs;
struct scsipi_link *sc_link = xs->sc_link;
ADW_SOFTC *sc = sc_link->adapter_softc;
int s;
s = splbio();
ccb->flags &= ~CCB_WATCHDOG;
adw_start_ccbs(sc);
splx(s);
}
/******************************************************************************/
/* NARROW and WIDE boards Interrupt callbacks */
/******************************************************************************/
/*
* adw_wide_isr_callback() - Second Level Interrupt Handler called by AdvISR()
*
* Interrupt callback function for the Wide SCSI Adv Library.
*/
static void
adw_wide_isr_callback(sc, scsiq)
ADW_SOFTC *sc;
ADW_SCSI_REQ_Q *scsiq;
{
bus_dma_tag_t dmat = sc->sc_dmat;
ADW_CCB *ccb = (ADW_CCB *) scsiq->ccb_ptr;
struct scsipi_xfer *xs = ccb->xs;
struct scsipi_sense_data *s1, *s2;
// int underrun = ASC_FALSE;
untimeout(adw_timeout, ccb);
/*
* If we were a data transfer, unload the map that described
* the data buffer.
*/
if (xs->datalen) {
bus_dmamap_sync(dmat, ccb->dmamap_xfer, 0,
ccb->dmamap_xfer->dm_mapsize,
(xs->flags & SCSI_DATA_IN) ? BUS_DMASYNC_POSTREAD :
BUS_DMASYNC_POSTWRITE);
bus_dmamap_unload(dmat, ccb->dmamap_xfer);
}
if ((ccb->flags & CCB_ALLOC) == 0) {
printf("%s: exiting ccb not allocated!\n", sc->sc_dev.dv_xname);
Debugger();
return;
}
/*
* Check for an underrun condition.
*/
/* if (xs->request_bufflen != 0 && scsiqp->data_cnt != 0) {
ASC_DBG1(1, "adw_isr_callback: underrun condition %lu bytes\n",
scsiqp->data_cnt);
underrun = ASC_TRUE;
}
*/
/*
* 'done_status' contains the command's ending status.
*/
switch (scsiq->done_status) {
case QD_NO_ERROR:
switch (scsiq->host_status) {
case QHSTA_NO_ERROR:
xs->error = XS_NOERROR;
xs->resid = 0;
break;
default:
/* QHSTA error occurred. */
xs->error = XS_DRIVER_STUFFUP;
break;
}
/*
* If there was an underrun without any other error,
* set DID_ERROR to indicate the underrun error.
*
* Note: There is no way yet to indicate the number
* of underrun bytes.
*/
/* if (xs->error == XS_NOERROR && underrun == ASC_TRUE) {
scp->result = HOST_BYTE(DID_UNDERRUN);
}
*/ break;
case QD_WITH_ERROR:
switch (scsiq->host_status) {
case QHSTA_NO_ERROR:
if (scsiq->scsi_status == SS_CHK_CONDITION) {
s1 = &ccb->scsi_sense;
s2 = &xs->sense.scsi_sense;
*s2 = *s1;
xs->error = XS_SENSE;
} else {
xs->error = XS_DRIVER_STUFFUP;
}
break;
default:
/* Some other QHSTA error occurred. */
xs->error = XS_DRIVER_STUFFUP;
break;
}
break;
case QD_ABORTED_BY_HOST:
default:
xs->error = XS_DRIVER_STUFFUP;
break;
}
adw_free_ccb(sc, ccb);
xs->flags |= ITSDONE;
scsipi_done(xs);
}
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