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src/sys/dev/ic/siop.c

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/* $OpenBSD: siop.c,v 1.90 2024/04/13 23:44:11 jsg Exp $ */
/* $NetBSD: siop.c,v 1.79 2005/11/18 23:10:32 bouyer Exp $ */
/*
* Copyright (c) 2000 Manuel Bouyer.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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.
*
*/
/* SYM53c7/8xx PCI-SCSI I/O Processors driver */
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/malloc.h>
#include <sys/kernel.h>
#include <sys/endian.h>
#include <machine/bus.h>
#include <dev/microcode/siop/siop.out>
#include <scsi/scsi_all.h>
#include <scsi/scsi_message.h>
#include <scsi/scsiconf.h>
#include <dev/ic/siopreg.h>
#include <dev/ic/siopvar_common.h>
#include <dev/ic/siopvar.h>
#ifndef SIOP_DEBUG
#undef SIOP_DEBUG_DR
#undef SIOP_DEBUG_INTR
#undef SIOP_DEBUG_SCHED
#undef DUMP_SCRIPT
#else
#define SIOP_DEBUG_DR
#define SIOP_DEBUG_INTR
#define SIOP_DEBUG_SCHED
#define DUMP_SCRIPT
#endif
#undef SIOP_STATS
#ifndef SIOP_DEFAULT_TARGET
#define SIOP_DEFAULT_TARGET 7
#endif
/* number of cmd descriptors per block */
#define SIOP_NCMDPB (PAGE_SIZE / sizeof(struct siop_xfer))
/* Number of scheduler slot (needs to match script) */
#define SIOP_NSLOTS 40
void siop_table_sync(struct siop_cmd *, int);
void siop_script_sync(struct siop_softc *, int);
u_int32_t siop_script_read(struct siop_softc *, u_int);
void siop_script_write(struct siop_softc *, u_int, u_int32_t);
void siop_reset(struct siop_softc *);
void siop_handle_reset(struct siop_softc *);
int siop_handle_qtag_reject(struct siop_cmd *);
void siop_scsicmd_end(struct siop_cmd *);
void siop_start(struct siop_softc *);
void siop_timeout(void *);
void siop_scsicmd(struct scsi_xfer *);
void * siop_cmd_get(void *);
void siop_cmd_put(void *, void *);
int siop_scsiprobe(struct scsi_link *);
void siop_scsifree(struct scsi_link *);
#ifdef DUMP_SCRIPT
void siop_dump_script(struct siop_softc *);
#endif
void siop_morecbd(struct siop_softc *);
struct siop_lunsw *siop_get_lunsw(struct siop_softc *);
void siop_add_reselsw(struct siop_softc *, int);
void siop_update_scntl3(struct siop_softc *, struct siop_common_target *);
struct siop_dmamem *siop_dmamem_alloc(struct siop_softc *, size_t);
void siop_dmamem_free(struct siop_softc *, struct siop_dmamem *);
struct cfdriver siop_cd = {
NULL, "siop", DV_DULL
};
const struct scsi_adapter siop_switch = {
siop_scsicmd, NULL, siop_scsiprobe, siop_scsifree, NULL
};
#ifdef SIOP_STATS
static int siop_stat_intr = 0;
static int siop_stat_intr_shortxfer = 0;
static int siop_stat_intr_sdp = 0;
static int siop_stat_intr_saveoffset = 0;
static int siop_stat_intr_done = 0;
static int siop_stat_intr_xferdisc = 0;
static int siop_stat_intr_lunresel = 0;
static int siop_stat_intr_qfull = 0;
void siop_printstats(void);
#define INCSTAT(x) x++
#else
#define INCSTAT(x)
#endif
void
siop_table_sync(struct siop_cmd *siop_cmd, int ops)
{
struct siop_common_softc *sc = siop_cmd->cmd_c.siop_sc;
bus_addr_t offset;
offset = siop_cmd->cmd_c.dsa -
SIOP_DMA_DVA(siop_cmd->siop_cbdp->xfers);
bus_dmamap_sync(sc->sc_dmat,
SIOP_DMA_MAP(siop_cmd->siop_cbdp->xfers), offset,
sizeof(struct siop_xfer), ops);
}
void
siop_script_sync(struct siop_softc *sc, int ops)
{
if ((sc->sc_c.features & SF_CHIP_RAM) == 0)
bus_dmamap_sync(sc->sc_c.sc_dmat, sc->sc_c.sc_scriptdma, 0,
PAGE_SIZE, ops);
}
u_int32_t
siop_script_read(struct siop_softc *sc, u_int offset)
{
if (sc->sc_c.features & SF_CHIP_RAM) {
return bus_space_read_4(sc->sc_c.sc_ramt, sc->sc_c.sc_ramh,
offset * 4);
} else {
return siop_ctoh32(&sc->sc_c, sc->sc_c.sc_script[offset]);
}
}
void
siop_script_write(struct siop_softc *sc, u_int offset, u_int32_t val)
{
if (sc->sc_c.features & SF_CHIP_RAM) {
bus_space_write_4(sc->sc_c.sc_ramt, sc->sc_c.sc_ramh,
offset * 4, val);
} else {
sc->sc_c.sc_script[offset] = siop_htoc32(&sc->sc_c, val);
}
}
void
siop_attach(struct siop_softc *sc)
{
struct scsibus_attach_args saa;
if (siop_common_attach(&sc->sc_c) != 0)
return;
TAILQ_INIT(&sc->free_list);
TAILQ_INIT(&sc->ready_list);
TAILQ_INIT(&sc->urgent_list);
TAILQ_INIT(&sc->cmds);
TAILQ_INIT(&sc->lunsw_list);
scsi_iopool_init(&sc->iopool, sc, siop_cmd_get, siop_cmd_put);
sc->sc_currschedslot = 0;
/* Start with one page worth of commands */
siop_morecbd(sc);
#ifdef SIOP_DEBUG
printf("%s: script size = %d, PHY addr=0x%x, VIRT=%p\n",
sc->sc_c.sc_dev.dv_xname, (int)sizeof(siop_script),
(u_int32_t)sc->sc_c.sc_scriptaddr, sc->sc_c.sc_script);
#endif
/* Do a bus reset, so that devices fall back to narrow/async */
siop_resetbus(&sc->sc_c);
/*
* siop_reset() will reset the chip, thus clearing pending interrupts
*/
siop_reset(sc);
#ifdef DUMP_SCRIPT
siop_dump_script(sc);
#endif
saa.saa_adapter_softc = sc;
saa.saa_adapter = &siop_switch;
saa.saa_adapter_target = sc->sc_c.sc_id;
saa.saa_adapter_buswidth = (sc->sc_c.features & SF_BUS_WIDE) ? 16 : 8;
saa.saa_luns = 8;
saa.saa_openings = SIOP_NTAG;
saa.saa_pool = &sc->iopool;
saa.saa_quirks = saa.saa_flags = 0;
saa.saa_wwpn = saa.saa_wwnn = 0;
config_found((struct device*)sc, &saa, scsiprint);
}
void
siop_reset(struct siop_softc *sc)
{
int i, j, buswidth;
struct siop_lunsw *lunsw;
siop_common_reset(&sc->sc_c);
/* copy and patch the script */
if (sc->sc_c.features & SF_CHIP_RAM) {
bus_space_write_region_4(sc->sc_c.sc_ramt, sc->sc_c.sc_ramh, 0,
siop_script, sizeof(siop_script) / sizeof(siop_script[0]));
for (j = 0; j <
(sizeof(E_abs_msgin_Used) / sizeof(E_abs_msgin_Used[0]));
j++) {
bus_space_write_4(sc->sc_c.sc_ramt, sc->sc_c.sc_ramh,
E_abs_msgin_Used[j] * 4,
sc->sc_c.sc_scriptaddr + Ent_msgin_space);
}
if (sc->sc_c.features & SF_CHIP_LED0) {
bus_space_write_region_4(sc->sc_c.sc_ramt,
sc->sc_c.sc_ramh,
Ent_led_on1, siop_led_on,
sizeof(siop_led_on) / sizeof(siop_led_on[0]));
bus_space_write_region_4(sc->sc_c.sc_ramt,
sc->sc_c.sc_ramh,
Ent_led_on2, siop_led_on,
sizeof(siop_led_on) / sizeof(siop_led_on[0]));
bus_space_write_region_4(sc->sc_c.sc_ramt,
sc->sc_c.sc_ramh,
Ent_led_off, siop_led_off,
sizeof(siop_led_off) / sizeof(siop_led_off[0]));
}
} else {
for (j = 0;
j < (sizeof(siop_script) / sizeof(siop_script[0])); j++) {
sc->sc_c.sc_script[j] =
siop_htoc32(&sc->sc_c, siop_script[j]);
}
for (j = 0; j <
(sizeof(E_abs_msgin_Used) / sizeof(E_abs_msgin_Used[0]));
j++) {
sc->sc_c.sc_script[E_abs_msgin_Used[j]] =
siop_htoc32(&sc->sc_c,
sc->sc_c.sc_scriptaddr + Ent_msgin_space);
}
if (sc->sc_c.features & SF_CHIP_LED0) {
for (j = 0; j < (sizeof(siop_led_on) /
sizeof(siop_led_on[0])); j++)
sc->sc_c.sc_script[
Ent_led_on1 / sizeof(siop_led_on[0]) + j
] = siop_htoc32(&sc->sc_c, siop_led_on[j]);
for (j = 0; j < (sizeof(siop_led_on) /
sizeof(siop_led_on[0])); j++)
sc->sc_c.sc_script[
Ent_led_on2 / sizeof(siop_led_on[0]) + j
] = siop_htoc32(&sc->sc_c, siop_led_on[j]);
for (j = 0; j < (sizeof(siop_led_off) /
sizeof(siop_led_off[0])); j++)
sc->sc_c.sc_script[
Ent_led_off / sizeof(siop_led_off[0]) + j
] = siop_htoc32(&sc->sc_c, siop_led_off[j]);
}
}
sc->script_free_lo = sizeof(siop_script) / sizeof(siop_script[0]);
sc->script_free_hi = sc->sc_c.ram_size / 4;
sc->sc_ntargets = 0;
/* free used and unused lun switches */
while((lunsw = TAILQ_FIRST(&sc->lunsw_list)) != NULL) {
#ifdef SIOP_DEBUG
printf("%s: free lunsw at offset %d\n",
sc->sc_c.sc_dev.dv_xname, lunsw->lunsw_off);
#endif
TAILQ_REMOVE(&sc->lunsw_list, lunsw, next);
free(lunsw, M_DEVBUF, 0);
}
TAILQ_INIT(&sc->lunsw_list);
/* restore reselect switch */
buswidth = (sc->sc_c.features & SF_BUS_WIDE) ? 16 : 8;
for (i = 0; i < buswidth; i++) {
struct siop_target *target;
if (sc->sc_c.targets[i] == NULL)
continue;
#ifdef SIOP_DEBUG
printf("%s: restore sw for target %d\n",
sc->sc_c.sc_dev.dv_xname, i);
#endif
target = (struct siop_target *)sc->sc_c.targets[i];
free(target->lunsw, M_DEVBUF, 0);
target->lunsw = siop_get_lunsw(sc);
if (target->lunsw == NULL) {
printf("%s: can't alloc lunsw for target %d\n",
sc->sc_c.sc_dev.dv_xname, i);
break;
}
siop_add_reselsw(sc, i);
}
/* start script */
if ((sc->sc_c.features & SF_CHIP_RAM) == 0) {
bus_dmamap_sync(sc->sc_c.sc_dmat, sc->sc_c.sc_scriptdma, 0,
PAGE_SIZE, BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
}
bus_space_write_4(sc->sc_c.sc_rt, sc->sc_c.sc_rh, SIOP_DSP,
sc->sc_c.sc_scriptaddr + Ent_reselect);
}
#if 0
#define CALL_SCRIPT(ent) do {\
printf ("start script DSA 0x%lx DSP 0x%lx\n", \
siop_cmd->cmd_c.dsa, \
sc->sc_c.sc_scriptaddr + ent); \
bus_space_write_4(sc->sc_c.sc_rt, sc->sc_c.sc_rh, SIOP_DSP, sc->sc_c.sc_scriptaddr + ent); \
} while (0)
#else
#define CALL_SCRIPT(ent) do {\
bus_space_write_4(sc->sc_c.sc_rt, sc->sc_c.sc_rh, SIOP_DSP, sc->sc_c.sc_scriptaddr + ent); \
} while (0)
#endif
int
siop_intr(void *v)
{
struct siop_softc *sc = v;
struct siop_target *siop_target;
struct siop_cmd *siop_cmd;
struct siop_lun *siop_lun;
struct scsi_xfer *xs;
int istat, sist, sstat1, dstat = 0;
u_int32_t irqcode;
int need_reset = 0;
int offset, target, lun, tag;
bus_addr_t dsa;
struct siop_cbd *cbdp;
int restart = 0;
istat = bus_space_read_1(sc->sc_c.sc_rt, sc->sc_c.sc_rh, SIOP_ISTAT);
if ((istat & (ISTAT_INTF | ISTAT_DIP | ISTAT_SIP)) == 0)
return 0;
INCSTAT(siop_stat_intr);
if (istat & ISTAT_INTF) {
printf("INTRF\n");
bus_space_write_1(sc->sc_c.sc_rt, sc->sc_c.sc_rh,
SIOP_ISTAT, ISTAT_INTF);
}
if ((istat &(ISTAT_DIP | ISTAT_SIP | ISTAT_ABRT)) ==
(ISTAT_DIP | ISTAT_ABRT)) {
/* clear abort */
bus_space_write_1(sc->sc_c.sc_rt, sc->sc_c.sc_rh,
SIOP_ISTAT, 0);
}
/* use DSA to find the current siop_cmd */
siop_cmd = NULL;
dsa = bus_space_read_4(sc->sc_c.sc_rt, sc->sc_c.sc_rh, SIOP_DSA);
TAILQ_FOREACH(cbdp, &sc->cmds, next) {
if (dsa >= SIOP_DMA_DVA(cbdp->xfers) &&
dsa < SIOP_DMA_DVA(cbdp->xfers) + PAGE_SIZE) {
dsa -= SIOP_DMA_DVA(cbdp->xfers);
siop_cmd = &cbdp->cmds[dsa / sizeof(struct siop_xfer)];
siop_table_sync(siop_cmd,
BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
break;
}
}
if (siop_cmd) {
xs = siop_cmd->cmd_c.xs;
siop_target = (struct siop_target *)siop_cmd->cmd_c.siop_target;
target = siop_cmd->cmd_c.xs->sc_link->target;
lun = siop_cmd->cmd_c.xs->sc_link->lun;
tag = siop_cmd->cmd_c.tag;
siop_lun = siop_target->siop_lun[lun];
#ifdef DIAGNOSTIC
if (siop_cmd->cmd_c.status != CMDST_ACTIVE &&
siop_cmd->cmd_c.status != CMDST_SENSE_ACTIVE) {
printf("siop_cmd (lun %d) for DSA 0x%x "
"not active (%d)\n", lun, (u_int)dsa,
siop_cmd->cmd_c.status);
xs = NULL;
siop_target = NULL;
target = -1;
lun = -1;
tag = -1;
siop_lun = NULL;
siop_cmd = NULL;
} else if (siop_lun->siop_tag[tag].active != siop_cmd) {
printf("siop_cmd (lun %d tag %d) not in siop_lun "
"active (%p != %p)\n", lun, tag, siop_cmd,
siop_lun->siop_tag[tag].active);
}
#endif
} else {
xs = NULL;
siop_target = NULL;
target = -1;
lun = -1;
tag = -1;
siop_lun = NULL;
}
if (istat & ISTAT_DIP) {
dstat = bus_space_read_1(sc->sc_c.sc_rt, sc->sc_c.sc_rh,
SIOP_DSTAT);
if (dstat & DSTAT_ABRT) {
/* was probably generated by a bus reset IOCTL */
if ((dstat & DSTAT_DFE) == 0)
siop_clearfifo(&sc->sc_c);
goto reset;
}
if (dstat & DSTAT_SSI) {
printf("single step dsp 0x%08x dsa 0x08%x\n",
(int)(bus_space_read_4(sc->sc_c.sc_rt,
sc->sc_c.sc_rh, SIOP_DSP) -
sc->sc_c.sc_scriptaddr),
bus_space_read_4(sc->sc_c.sc_rt, sc->sc_c.sc_rh,
SIOP_DSA));
if ((dstat & ~(DSTAT_DFE | DSTAT_SSI)) == 0 &&
(istat & ISTAT_SIP) == 0) {
bus_space_write_1(sc->sc_c.sc_rt,
sc->sc_c.sc_rh, SIOP_DCNTL,
bus_space_read_1(sc->sc_c.sc_rt,
sc->sc_c.sc_rh, SIOP_DCNTL) | DCNTL_STD);
}
return 1;
}
if (dstat & ~(DSTAT_SIR | DSTAT_DFE | DSTAT_SSI)) {
printf("%s: DMA IRQ:", sc->sc_c.sc_dev.dv_xname);
if (dstat & DSTAT_IID)
printf(" illegal instruction");
if (dstat & DSTAT_BF)
printf(" bus fault");
if (dstat & DSTAT_MDPE)
printf(" parity");
if (dstat & DSTAT_DFE)
printf(" DMA fifo empty");
else
siop_clearfifo(&sc->sc_c);
printf(", DSP=0x%x DSA=0x%x: ",
(int)(bus_space_read_4(sc->sc_c.sc_rt, sc->sc_c.sc_rh,
SIOP_DSP) - sc->sc_c.sc_scriptaddr),
bus_space_read_4(sc->sc_c.sc_rt, sc->sc_c.sc_rh, SIOP_DSA));
if (siop_cmd)
printf("last msg_in=0x%x status=0x%x\n",
siop_cmd->cmd_tables->msg_in[0],
siop_ctoh32(&sc->sc_c,
siop_cmd->cmd_tables->status));
else
printf("current DSA invalid\n");
need_reset = 1;
}
}
if (istat & ISTAT_SIP) {
if (istat & ISTAT_DIP)
delay(10);
/*
* Can't read sist0 & sist1 independently, or we have to
* insert delay
*/
sist = bus_space_read_2(sc->sc_c.sc_rt, sc->sc_c.sc_rh,
SIOP_SIST0);
sstat1 = bus_space_read_1(sc->sc_c.sc_rt, sc->sc_c.sc_rh,
SIOP_SSTAT1);
#ifdef SIOP_DEBUG_INTR
printf("scsi interrupt, sist=0x%x sstat1=0x%x "
"DSA=0x%x DSP=0x%lx\n", sist, sstat1,
bus_space_read_4(sc->sc_c.sc_rt, sc->sc_c.sc_rh, SIOP_DSA),
(u_long)(bus_space_read_4(sc->sc_c.sc_rt, sc->sc_c.sc_rh,
SIOP_DSP) -
sc->sc_c.sc_scriptaddr));
#endif
if (sist & SIST0_RST) {
siop_handle_reset(sc);
siop_start(sc);
/* no table to flush here */
return 1;
}
if (sist & SIST0_SGE) {
if (siop_cmd)
sc_print_addr(xs->sc_link);
else
printf("%s: ", sc->sc_c.sc_dev.dv_xname);
printf("scsi gross error\n");
goto reset;
}
if ((sist & SIST0_MA) && need_reset == 0) {
if (siop_cmd) {
int scratcha0;
/* XXX Why read DSTAT again? */
dstat = bus_space_read_1(sc->sc_c.sc_rt,
sc->sc_c.sc_rh, SIOP_DSTAT);
/*
* first restore DSA, in case we were in a S/G
* operation.
*/
bus_space_write_4(sc->sc_c.sc_rt,
sc->sc_c.sc_rh,
SIOP_DSA, siop_cmd->cmd_c.dsa);
scratcha0 = bus_space_read_1(sc->sc_c.sc_rt,
sc->sc_c.sc_rh, SIOP_SCRATCHA);
switch (sstat1 & SSTAT1_PHASE_MASK) {
case SSTAT1_PHASE_STATUS:
/*
* previous phase may be aborted for any reason
* ( for example, the target has less data to
* transfer than requested). Compute resid and
* just go to status, the command should
* terminate.
*/
INCSTAT(siop_stat_intr_shortxfer);
if (scratcha0 & A_flag_data)
siop_ma(&siop_cmd->cmd_c);
else if ((dstat & DSTAT_DFE) == 0)
siop_clearfifo(&sc->sc_c);
CALL_SCRIPT(Ent_status);
return 1;
case SSTAT1_PHASE_MSGIN:
/*
* target may be ready to disconnect
* Compute resid which would be used later
* if a save data pointer is needed.
*/
INCSTAT(siop_stat_intr_xferdisc);
if (scratcha0 & A_flag_data)
siop_ma(&siop_cmd->cmd_c);
else if ((dstat & DSTAT_DFE) == 0)
siop_clearfifo(&sc->sc_c);
bus_space_write_1(sc->sc_c.sc_rt,
sc->sc_c.sc_rh, SIOP_SCRATCHA,
scratcha0 & ~A_flag_data);
CALL_SCRIPT(Ent_msgin);
return 1;
}
printf("%s: unexpected phase mismatch %d\n",
sc->sc_c.sc_dev.dv_xname,
sstat1 & SSTAT1_PHASE_MASK);
} else {
printf("%s: phase mismatch without command\n",
sc->sc_c.sc_dev.dv_xname);
}
need_reset = 1;
}
if (sist & SIST0_PAR) {
/* parity error, reset */
if (siop_cmd)
sc_print_addr(xs->sc_link);
else
printf("%s: ", sc->sc_c.sc_dev.dv_xname);
printf("parity error\n");
goto reset;
}
if ((sist & (SIST1_STO << 8)) && need_reset == 0) {
/* selection time out, assume there's no device here */
if (siop_cmd) {
siop_cmd->cmd_c.status = CMDST_DONE;
xs->error = XS_SELTIMEOUT;
goto end;
} else {
printf("%s: selection timeout without "
"command\n", sc->sc_c.sc_dev.dv_xname);
need_reset = 1;
}
}
if (sist & SIST0_UDC) {
/*
* unexpected disconnect. Usually the target signals
* a fatal condition this way. Attempt to get sense.
*/
if (siop_cmd) {
siop_cmd->cmd_tables->status =
siop_htoc32(&sc->sc_c, SCSI_CHECK);
goto end;
}
printf("%s: unexpected disconnect without "
"command\n", sc->sc_c.sc_dev.dv_xname);
goto reset;
}
if (sist & (SIST1_SBMC << 8)) {
/* SCSI bus mode change */
if (siop_modechange(&sc->sc_c) == 0 || need_reset == 1)
goto reset;
if ((istat & ISTAT_DIP) && (dstat & DSTAT_SIR)) {
/*
* we have a script interrupt, it will
* restart the script.
*/
goto scintr;
}
/*
* else we have to restart it ourselves, at the
* interrupted instruction.
*/
bus_space_write_4(sc->sc_c.sc_rt, sc->sc_c.sc_rh,
SIOP_DSP,
bus_space_read_4(sc->sc_c.sc_rt, sc->sc_c.sc_rh,
SIOP_DSP) - 8);
return 1;
}
/* Else it's an unhandled exception (for now). */
printf("%s: unhandled scsi interrupt, sist=0x%x sstat1=0x%x "
"DSA=0x%x DSP=0x%x\n", sc->sc_c.sc_dev.dv_xname,
sist, sstat1,
bus_space_read_4(sc->sc_c.sc_rt, sc->sc_c.sc_rh, SIOP_DSA),
(int)(bus_space_read_4(sc->sc_c.sc_rt, sc->sc_c.sc_rh,
SIOP_DSP) - sc->sc_c.sc_scriptaddr));
if (siop_cmd) {
siop_cmd->cmd_c.status = CMDST_DONE;
xs->error = XS_SELTIMEOUT;
goto end;
}
need_reset = 1;
} else {
sist = sstat1 = 0;
}
if (need_reset) {
reset:
/* fatal error, reset the bus */
siop_resetbus(&sc->sc_c);
/* no table to flush here */
return 1;
}
scintr:
if ((istat & ISTAT_DIP) && (dstat & DSTAT_SIR)) { /* script interrupt */
irqcode = bus_space_read_4(sc->sc_c.sc_rt, sc->sc_c.sc_rh,
SIOP_DSPS);
#ifdef SIOP_DEBUG_INTR
printf("script interrupt 0x%x\n", irqcode);
#endif
/*
* no command, or an inactive command is only valid for a
* reselect interrupt
*/
if ((irqcode & 0x80) == 0) {
if (siop_cmd == NULL) {
printf(
"%s: script interrupt (0x%x) with invalid DSA !!!\n",
sc->sc_c.sc_dev.dv_xname, irqcode);
goto reset;
}
if (siop_cmd->cmd_c.status != CMDST_ACTIVE &&
siop_cmd->cmd_c.status != CMDST_SENSE_ACTIVE) {
printf("%s: command with invalid status "
"(IRQ code 0x%x current status %d) !\n",
sc->sc_c.sc_dev.dv_xname,
irqcode, siop_cmd->cmd_c.status);
xs = NULL;
}
}
switch(irqcode) {
case A_int_err:
printf("error, DSP=0x%x\n",
(int)(bus_space_read_4(sc->sc_c.sc_rt,
sc->sc_c.sc_rh, SIOP_DSP) - sc->sc_c.sc_scriptaddr));
if (xs) {
xs->error = XS_SELTIMEOUT;
goto end;
} else {
goto reset;
}
case A_int_reseltarg:
printf("%s: reselect with invalid target\n",
sc->sc_c.sc_dev.dv_xname);
goto reset;
case A_int_resellun:
INCSTAT(siop_stat_intr_lunresel);
target = bus_space_read_1(sc->sc_c.sc_rt,
sc->sc_c.sc_rh, SIOP_SCRATCHA) & 0xf;
lun = bus_space_read_1(sc->sc_c.sc_rt, sc->sc_c.sc_rh,
SIOP_SCRATCHA + 1);
tag = bus_space_read_1(sc->sc_c.sc_rt, sc->sc_c.sc_rh,
SIOP_SCRATCHA + 2);
siop_target =
(struct siop_target *)sc->sc_c.targets[target];
if (siop_target == NULL) {
printf("%s: reselect with invalid target %d\n",
sc->sc_c.sc_dev.dv_xname, target);
goto reset;
}
siop_lun = siop_target->siop_lun[lun];
if (siop_lun == NULL) {
printf("%s: target %d reselect with invalid "
"lun %d\n", sc->sc_c.sc_dev.dv_xname,
target, lun);
goto reset;
}
if (siop_lun->siop_tag[tag].active == NULL) {
printf("%s: target %d lun %d tag %d reselect "
"without command\n",
sc->sc_c.sc_dev.dv_xname,
target, lun, tag);
goto reset;
}
siop_cmd = siop_lun->siop_tag[tag].active;
bus_space_write_4(sc->sc_c.sc_rt, sc->sc_c.sc_rh,
SIOP_DSP, siop_cmd->cmd_c.dsa +
sizeof(struct siop_common_xfer) +
Ent_ldsa_reload_dsa);
siop_table_sync(siop_cmd, BUS_DMASYNC_PREWRITE);
return 1;
case A_int_reseltag:
printf("%s: reselect with invalid tag\n",
sc->sc_c.sc_dev.dv_xname);
goto reset;
case A_int_msgin:
{
int msgin = bus_space_read_1(sc->sc_c.sc_rt,
sc->sc_c.sc_rh, SIOP_SFBR);
if (msgin == MSG_MESSAGE_REJECT) {
int msg, extmsg;
if (siop_cmd->cmd_tables->msg_out[0] & 0x80) {
/*
* message was part of a identify +
* something else. Identify shouldn't
* have been rejected.
*/
msg =
siop_cmd->cmd_tables->msg_out[1];
extmsg =
siop_cmd->cmd_tables->msg_out[3];
} else {
msg = siop_cmd->cmd_tables->msg_out[0];
extmsg =
siop_cmd->cmd_tables->msg_out[2];
}
if (msg == MSG_MESSAGE_REJECT) {
/* MSG_REJECT for a MSG_REJECT !*/
if (xs)
sc_print_addr(xs->sc_link);
else
printf("%s: ",
sc->sc_c.sc_dev.dv_xname);
printf("our reject message was "
"rejected\n");
goto reset;
}
if (msg == MSG_EXTENDED &&
extmsg == MSG_EXT_WDTR) {
/* WDTR rejected, initiate sync */
if ((siop_target->target_c.flags &
TARF_SYNC) == 0) {
siop_target->target_c.status =
TARST_OK;
siop_update_xfer_mode(&sc->sc_c,
target);
/* no table to flush here */
CALL_SCRIPT(Ent_msgin_ack);
return 1;
}
siop_target->target_c.status =
TARST_SYNC_NEG;
siop_sdtr_msg(&siop_cmd->cmd_c, 0,
sc->sc_c.st_minsync,
sc->sc_c.maxoff);
siop_table_sync(siop_cmd,
BUS_DMASYNC_PREREAD |
BUS_DMASYNC_PREWRITE);
CALL_SCRIPT(Ent_send_msgout);
return 1;
} else if (msg == MSG_EXTENDED &&
extmsg == MSG_EXT_SDTR) {
/* sync rejected */
siop_target->target_c.offset = 0;
siop_target->target_c.period = 0;
siop_target->target_c.status = TARST_OK;
siop_update_xfer_mode(&sc->sc_c,
target);
/* no table to flush here */
CALL_SCRIPT(Ent_msgin_ack);
return 1;
} else if (msg == MSG_EXTENDED &&
extmsg == MSG_EXT_PPR) {
/* PPR negotiation rejected */
siop_target->target_c.offset = 0;
siop_target->target_c.period = 0;
siop_target->target_c.status = TARST_ASYNC;
siop_target->target_c.flags &= ~(TARF_DT | TARF_ISDT);
CALL_SCRIPT(Ent_msgin_ack);
return 1;
} else if (msg == MSG_SIMPLE_Q_TAG ||
msg == MSG_HEAD_OF_Q_TAG ||
msg == MSG_ORDERED_Q_TAG) {
if (siop_handle_qtag_reject(
siop_cmd) == -1)
goto reset;
CALL_SCRIPT(Ent_msgin_ack);
return 1;
}
if (xs)
sc_print_addr(xs->sc_link);
else
printf("%s: ",
sc->sc_c.sc_dev.dv_xname);
if (msg == MSG_EXTENDED) {
printf("scsi message reject, extended "
"message sent was 0x%x\n", extmsg);
} else {
printf("scsi message reject, message "
"sent was 0x%x\n", msg);
}
/* no table to flush here */
CALL_SCRIPT(Ent_msgin_ack);
return 1;
}
if (msgin == MSG_IGN_WIDE_RESIDUE) {
/* use the extmsgdata table to get the second byte */
siop_cmd->cmd_tables->t_extmsgdata.count =
siop_htoc32(&sc->sc_c, 1);
siop_table_sync(siop_cmd,
BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
CALL_SCRIPT(Ent_get_extmsgdata);
return 1;
}
if (xs)
sc_print_addr(xs->sc_link);
else
printf("%s: ", sc->sc_c.sc_dev.dv_xname);
printf("unhandled message 0x%x\n",
siop_cmd->cmd_tables->msg_in[0]);
siop_cmd->cmd_tables->msg_out[0] = MSG_MESSAGE_REJECT;
siop_cmd->cmd_tables->t_msgout.count =
siop_htoc32(&sc->sc_c, 1);
siop_table_sync(siop_cmd,
BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
CALL_SCRIPT(Ent_send_msgout);
return 1;
}
case A_int_extmsgin:
#ifdef SIOP_DEBUG_INTR
printf("extended message: msg 0x%x len %d\n",
siop_cmd->cmd_tables->msg_in[2],
siop_cmd->cmd_tables->msg_in[1]);
#endif
if (siop_cmd->cmd_tables->msg_in[1] >
sizeof(siop_cmd->cmd_tables->msg_in) - 2)
printf("%s: extended message too big (%d)\n",
sc->sc_c.sc_dev.dv_xname,
siop_cmd->cmd_tables->msg_in[1]);
siop_cmd->cmd_tables->t_extmsgdata.count =
siop_htoc32(&sc->sc_c,
siop_cmd->cmd_tables->msg_in[1] - 1);
siop_table_sync(siop_cmd,
BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
CALL_SCRIPT(Ent_get_extmsgdata);
return 1;
case A_int_extmsgdata:
#ifdef SIOP_DEBUG_INTR
{
int i;
printf("extended message: 0x%x, data:",
siop_cmd->cmd_tables->msg_in[2]);
for (i = 3; i < 2 + siop_cmd->cmd_tables->msg_in[1];
i++)
printf(" 0x%x",
siop_cmd->cmd_tables->msg_in[i]);
printf("\n");
}
#endif
if (siop_cmd->cmd_tables->msg_in[0] ==
MSG_IGN_WIDE_RESIDUE) {
/* we got the second byte of MSG_IGN_WIDE_RESIDUE */
if (siop_cmd->cmd_tables->msg_in[3] != 1)
printf("MSG_IGN_WIDE_RESIDUE: "
"bad len %d\n",
siop_cmd->cmd_tables->msg_in[3]);
switch (siop_iwr(&siop_cmd->cmd_c)) {
case SIOP_NEG_MSGOUT:
siop_table_sync(siop_cmd,
BUS_DMASYNC_PREREAD |
BUS_DMASYNC_PREWRITE);
CALL_SCRIPT(Ent_send_msgout);
return(1);
case SIOP_NEG_ACK:
CALL_SCRIPT(Ent_msgin_ack);
return(1);
default:
panic("invalid retval from "
"siop_iwr()");
}
return(1);
}
if (siop_cmd->cmd_tables->msg_in[2] == MSG_EXT_WDTR) {
switch (siop_wdtr_neg(&siop_cmd->cmd_c)) {
case SIOP_NEG_MSGOUT:
siop_update_scntl3(sc,
siop_cmd->cmd_c.siop_target);
siop_table_sync(siop_cmd,
BUS_DMASYNC_PREREAD |
BUS_DMASYNC_PREWRITE);
CALL_SCRIPT(Ent_send_msgout);
return(1);
case SIOP_NEG_ACK:
siop_update_scntl3(sc,
siop_cmd->cmd_c.siop_target);
CALL_SCRIPT(Ent_msgin_ack);
return(1);
default:
panic("invalid retval from "
"siop_wdtr_neg()");
}
return(1);
}
if (siop_cmd->cmd_tables->msg_in[2] == MSG_EXT_SDTR) {
switch (siop_sdtr_neg(&siop_cmd->cmd_c)) {
case SIOP_NEG_MSGOUT:
siop_update_scntl3(sc,
siop_cmd->cmd_c.siop_target);
siop_table_sync(siop_cmd,
BUS_DMASYNC_PREREAD |
BUS_DMASYNC_PREWRITE);
CALL_SCRIPT(Ent_send_msgout);
return(1);
case SIOP_NEG_ACK:
siop_update_scntl3(sc,
siop_cmd->cmd_c.siop_target);
CALL_SCRIPT(Ent_msgin_ack);
return(1);
default:
panic("invalid retval from "
"siop_sdtr_neg()");
}
return(1);
}
if (siop_cmd->cmd_tables->msg_in[2] == MSG_EXT_PPR) {
switch (siop_ppr_neg(&siop_cmd->cmd_c)) {
case SIOP_NEG_MSGOUT:
siop_update_scntl3(sc,
siop_cmd->cmd_c.siop_target);
siop_table_sync(siop_cmd,
BUS_DMASYNC_PREREAD |
BUS_DMASYNC_PREWRITE);
CALL_SCRIPT(Ent_send_msgout);
return(1);
case SIOP_NEG_ACK:
siop_update_scntl3(sc,
siop_cmd->cmd_c.siop_target);
CALL_SCRIPT(Ent_msgin_ack);
return(1);
default:
panic("invalid retval from "
"siop_wdtr_neg()");
}
return(1);
}
/* send a message reject */
siop_cmd->cmd_tables->msg_out[0] = MSG_MESSAGE_REJECT;
siop_cmd->cmd_tables->t_msgout.count =
siop_htoc32(&sc->sc_c, 1);
siop_table_sync(siop_cmd,
BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
CALL_SCRIPT(Ent_send_msgout);
return 1;
case A_int_disc:
INCSTAT(siop_stat_intr_sdp);
offset = bus_space_read_1(sc->sc_c.sc_rt,
sc->sc_c.sc_rh, SIOP_SCRATCHA + 1);
#ifdef SIOP_DEBUG_DR
printf("disconnect offset %d\n", offset);
#endif
siop_sdp(&siop_cmd->cmd_c, offset);
/* we start again with no offset */
siop_cmd->saved_offset = SIOP_NOOFFSET;
siop_table_sync(siop_cmd,
BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
CALL_SCRIPT(Ent_script_sched);
return 1;
case A_int_saveoffset:
INCSTAT(siop_stat_intr_saveoffset);
offset = bus_space_read_1(sc->sc_c.sc_rt,
sc->sc_c.sc_rh, SIOP_SCRATCHA + 1);
#ifdef SIOP_DEBUG_DR
printf("saveoffset offset %d\n", offset);
#endif
siop_cmd->saved_offset = offset;
CALL_SCRIPT(Ent_script_sched);
return 1;
case A_int_resfail:
printf("reselect failed\n");
/* check if we can put some command in scheduler */
siop_start(sc);
CALL_SCRIPT(Ent_script_sched);
return 1;
case A_int_done:
if (xs == NULL) {
printf("%s: done without command, DSA=0x%lx\n",
sc->sc_c.sc_dev.dv_xname,
(u_long)siop_cmd->cmd_c.dsa);
siop_cmd->cmd_c.status = CMDST_FREE;
siop_start(sc);
CALL_SCRIPT(Ent_script_sched);
return 1;
}
#ifdef SIOP_DEBUG_INTR
printf("done, DSA=0x%lx target id 0x%x last msg "
"in=0x%x status=0x%x\n", (u_long)siop_cmd->cmd_c.dsa,
siop_ctoh32(&sc->sc_c, siop_cmd->cmd_tables->id),
siop_cmd->cmd_tables->msg_in[0],
siop_ctoh32(&sc->sc_c,
siop_cmd->cmd_tables->status));
#endif
INCSTAT(siop_stat_intr_done);
/* update resid. */
offset = bus_space_read_1(sc->sc_c.sc_rt,
sc->sc_c.sc_rh, SIOP_SCRATCHA + 1);
/*
* if we got a disconnect between the last data phase
* and the status phase, offset will be 0. In this
* case, siop_cmd->saved_offset will have the proper
* value if it got updated by the controller
*/
if (offset == 0 &&
siop_cmd->saved_offset != SIOP_NOOFFSET)
offset = siop_cmd->saved_offset;
siop_update_resid(&siop_cmd->cmd_c, offset);
if (siop_cmd->cmd_c.status == CMDST_SENSE_ACTIVE)
siop_cmd->cmd_c.status = CMDST_SENSE_DONE;
else
siop_cmd->cmd_c.status = CMDST_DONE;
goto end;
default:
printf("unknown irqcode %x\n", irqcode);
if (xs) {
xs->error = XS_SELTIMEOUT;
goto end;
}
goto reset;
}
return 1;
} else
irqcode = 0;
/* We can get here if ISTAT_DIP and DSTAT_DFE are the only bits set. */
/* But that *SHOULDN'T* happen. It does on powerpc (at least). */
printf("%s: siop_intr() - we should not be here!\n"
" istat = 0x%x, dstat = 0x%x, sist = 0x%x, sstat1 = 0x%x\n"
" need_reset = %x, irqcode = %x, siop_cmd %s\n",
sc->sc_c.sc_dev.dv_xname,
istat, dstat, sist, sstat1, need_reset, irqcode,
(siop_cmd == NULL) ? "== NULL" : "!= NULL");
goto reset; /* Where we should have gone in the first place! */
end:
/*
* restart the script now if command completed properly
* Otherwise wait for siop_scsicmd_end(), we may need to cleanup the
* queue
*/
xs->status = siop_ctoh32(&sc->sc_c, siop_cmd->cmd_tables->status);
if (xs->status == SCSI_OK)
CALL_SCRIPT(Ent_script_sched);
else
restart = 1;
siop_lun->siop_tag[tag].active = NULL;
siop_scsicmd_end(siop_cmd);
siop_start(sc);
if (restart)
CALL_SCRIPT(Ent_script_sched);
return 1;
}
void
siop_scsicmd_end(struct siop_cmd *siop_cmd)
{
struct scsi_xfer *xs = siop_cmd->cmd_c.xs;
struct siop_softc *sc = (struct siop_softc *)siop_cmd->cmd_c.siop_sc;
struct siop_lun *siop_lun =
((struct siop_target*)sc->sc_c.targets[xs->sc_link->target])->siop_lun[xs->sc_link->lun];
/*
* If the command is re-queued (SENSE, QUEUE_FULL) it
* must get a new timeout, so delete existing timeout now.
*/
timeout_del(&siop_cmd->cmd_c.xs->stimeout);
switch(xs->status) {
case SCSI_OK:
xs->error = (siop_cmd->cmd_c.status == CMDST_DONE) ?
XS_NOERROR : XS_SENSE;
break;
case SCSI_BUSY:
xs->error = XS_BUSY;
break;
case SCSI_CHECK:
if (siop_cmd->cmd_c.status == CMDST_SENSE_DONE) {
/* request sense on a request sense ? */
printf("%s: request sense failed\n",
sc->sc_c.sc_dev.dv_xname);
xs->error = XS_DRIVER_STUFFUP;
} else {
siop_cmd->cmd_c.status = CMDST_SENSE;
}
break;
case SCSI_QUEUE_FULL:
/*
* Device didn't queue the command. We have to retry
* it. We insert it into the urgent list, hoping to
* preserve order. But unfortunately, commands already
* in the scheduler may be accepted before this one.
* Also remember the condition, to avoid starting new
* commands for this device before one is done.
*/
INCSTAT(siop_stat_intr_qfull);
#ifdef SIOP_DEBUG
printf("%s:%d:%d: queue full (tag %d)\n", sc->sc_c.sc_dev.dv_xname,
xs->sc_link->target,
xs->sc_link->lun, siop_cmd->cmd_c.tag);
#endif
siop_lun->lun_flags |= SIOP_LUNF_FULL;
siop_cmd->cmd_c.status = CMDST_READY;
siop_setuptables(&siop_cmd->cmd_c);
siop_table_sync(siop_cmd, BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
TAILQ_INSERT_TAIL(&sc->urgent_list, siop_cmd, next);
return;
case SCSI_SIOP_NOCHECK:
/*
* don't check status, xs->error is already valid
*/
break;
case SCSI_SIOP_NOSTATUS:
/*
* the status byte was not updated, cmd was
* aborted
*/
xs->error = XS_SELTIMEOUT;
break;
default:
xs->error = XS_DRIVER_STUFFUP;
}
if (siop_cmd->cmd_c.status != CMDST_SENSE_DONE &&
xs->flags & (SCSI_DATA_IN | SCSI_DATA_OUT)) {
bus_dmamap_sync(sc->sc_c.sc_dmat, siop_cmd->cmd_c.dmamap_data, 0,
siop_cmd->cmd_c.dmamap_data->dm_mapsize,
(xs->flags & SCSI_DATA_IN) ?
BUS_DMASYNC_POSTREAD : BUS_DMASYNC_POSTWRITE);
bus_dmamap_unload(sc->sc_c.sc_dmat, siop_cmd->cmd_c.dmamap_data);
}
if (siop_cmd->cmd_c.status == CMDST_SENSE) {
/* issue a request sense for this target */
struct scsi_sense *cmd = (struct scsi_sense *)&siop_cmd->cmd_c.siop_tables->xscmd;
int error;
bzero(cmd, sizeof(*cmd));
siop_cmd->cmd_c.siop_tables->cmd.count =
siop_htoc32(&sc->sc_c, sizeof(struct scsi_sense));
cmd->opcode = REQUEST_SENSE;
cmd->byte2 = xs->sc_link->lun << 5;
cmd->unused[0] = cmd->unused[1] = 0;
cmd->length = sizeof(struct scsi_sense_data);
cmd->control = 0;
siop_cmd->cmd_c.flags &= ~CMDFL_TAG;
error = bus_dmamap_load(sc->sc_c.sc_dmat,
siop_cmd->cmd_c.dmamap_data,
siop_cmd->cmd_c.sense, sizeof(struct scsi_sense_data),
NULL, BUS_DMA_NOWAIT);
if (error) {
printf("%s: unable to load data DMA map "
"(for SENSE): %d\n",
sc->sc_c.sc_dev.dv_xname, error);
xs->error = XS_DRIVER_STUFFUP;
goto out;
}
bus_dmamap_sync(sc->sc_c.sc_dmat, siop_cmd->cmd_c.dmamap_data,
0, siop_cmd->cmd_c.dmamap_data->dm_mapsize,
BUS_DMASYNC_PREREAD);
siop_setuptables(&siop_cmd->cmd_c);
siop_table_sync(siop_cmd, BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
/* arrange for the cmd to be handled now */
TAILQ_INSERT_HEAD(&sc->urgent_list, siop_cmd, next);
return;
} else if (siop_cmd->cmd_c.status == CMDST_SENSE_DONE) {
bus_dmamap_sync(sc->sc_c.sc_dmat, siop_cmd->cmd_c.dmamap_data,
0, siop_cmd->cmd_c.dmamap_data->dm_mapsize,
BUS_DMASYNC_POSTREAD);
bus_dmamap_unload(sc->sc_c.sc_dmat, siop_cmd->cmd_c.dmamap_data);
bcopy(siop_cmd->cmd_c.sense, &xs->sense, sizeof(xs->sense));
}
out:
siop_lun->lun_flags &= ~SIOP_LUNF_FULL;
#if 0
if (xs->resid != 0)
printf("resid %d datalen %d\n", xs->resid, xs->datalen);
#endif
scsi_done(xs);
}
/*
* handle a rejected queue tag message: the command will run untagged,
* has to adjust the reselect script.
*/
int
siop_handle_qtag_reject(struct siop_cmd *siop_cmd)
{
struct siop_softc *sc = (struct siop_softc *)siop_cmd->cmd_c.siop_sc;
int target = siop_cmd->cmd_c.xs->sc_link->target;
int lun = siop_cmd->cmd_c.xs->sc_link->lun;
int tag = siop_cmd->cmd_tables->msg_out[2];
struct siop_lun *siop_lun =
((struct siop_target*)sc->sc_c.targets[target])->siop_lun[lun];
#ifdef SIOP_DEBUG
printf("%s:%d:%d: tag message %d (%d) rejected (status %d)\n",
sc->sc_c.sc_dev.dv_xname, target, lun, tag, siop_cmd->cmd_c.tag,
siop_cmd->cmd_c.status);
#endif
if (siop_lun->siop_tag[0].active != NULL) {
printf("%s: untagged command already running for target %d "
"lun %d (status %d)\n", sc->sc_c.sc_dev.dv_xname,
target, lun, siop_lun->siop_tag[0].active->cmd_c.status);
return -1;
}
/* clear tag slot */
siop_lun->siop_tag[tag].active = NULL;
/* add command to non-tagged slot */
siop_lun->siop_tag[0].active = siop_cmd;
siop_cmd->cmd_c.tag = 0;
/* adjust reselect script if there is one */
if (siop_lun->siop_tag[0].reseloff > 0) {
siop_script_write(sc,
siop_lun->siop_tag[0].reseloff + 1,
siop_cmd->cmd_c.dsa + sizeof(struct siop_common_xfer) +
Ent_ldsa_reload_dsa);
siop_table_sync(siop_cmd, BUS_DMASYNC_PREWRITE);
}
return 0;
}
/*
* handle a bus reset: reset chip, unqueue all active commands, free all
* target struct and report lossage to upper layer.
* As the upper layer may requeue immediately we have to first store
* all active commands in a temporary queue.
*/
void
siop_handle_reset(struct siop_softc *sc)
{
struct cmd_list reset_list;
struct siop_cmd *siop_cmd, *next_siop_cmd;
struct siop_lun *siop_lun;
int target, lun, tag, buswidth;
/*
* scsi bus reset. reset the chip and restart
* the queue. Need to clean up all active commands
*/
printf("%s: scsi bus reset\n", sc->sc_c.sc_dev.dv_xname);
/* stop, reset and restart the chip */
siop_reset(sc);
TAILQ_INIT(&reset_list);
/*
* Process all commands: first commands being executed
*/
buswidth = (sc->sc_c.features & SF_BUS_WIDE) ? 16 : 8;
for (target = 0; target < buswidth; target++) {
if (sc->sc_c.targets[target] == NULL)
continue;
for (lun = 0; lun < 8; lun++) {
struct siop_target *siop_target =
(struct siop_target *)sc->sc_c.targets[target];
siop_lun = siop_target->siop_lun[lun];
if (siop_lun == NULL)
continue;
siop_lun->lun_flags &= ~SIOP_LUNF_FULL;
for (tag = 0; tag <
((sc->sc_c.targets[target]->flags & TARF_TAG) ?
SIOP_NTAG : 1);
tag++) {
siop_cmd = siop_lun->siop_tag[tag].active;
if (siop_cmd == NULL)
continue;
siop_lun->siop_tag[tag].active = NULL;
TAILQ_INSERT_TAIL(&reset_list, siop_cmd, next);
sc_print_addr(siop_cmd->cmd_c.xs->sc_link);
printf("cmd %p (tag %d) added to reset list\n",
siop_cmd, tag);
}
}
if (sc->sc_c.targets[target]->status != TARST_PROBING) {
sc->sc_c.targets[target]->status = TARST_ASYNC;
sc->sc_c.targets[target]->flags &= ~TARF_ISWIDE;
sc->sc_c.targets[target]->period =
sc->sc_c.targets[target]->offset = 0;
siop_update_xfer_mode(&sc->sc_c, target);
}
}
/* Next commands from the urgent list */
for (siop_cmd = TAILQ_FIRST(&sc->urgent_list); siop_cmd != NULL;
siop_cmd = next_siop_cmd) {
next_siop_cmd = TAILQ_NEXT(siop_cmd, next);
TAILQ_REMOVE(&sc->urgent_list, siop_cmd, next);
TAILQ_INSERT_TAIL(&reset_list, siop_cmd, next);
sc_print_addr(siop_cmd->cmd_c.xs->sc_link);
printf("cmd %p added to reset list from urgent list\n",
siop_cmd);
}
/* Then commands waiting in the input list. */
for (siop_cmd = TAILQ_FIRST(&sc->ready_list); siop_cmd != NULL;
siop_cmd = next_siop_cmd) {
next_siop_cmd = TAILQ_NEXT(siop_cmd, next);
TAILQ_REMOVE(&sc->ready_list, siop_cmd, next);
TAILQ_INSERT_TAIL(&reset_list, siop_cmd, next);
sc_print_addr(siop_cmd->cmd_c.xs->sc_link);
printf("cmd %p added to reset list from ready list\n",
siop_cmd);
}
for (siop_cmd = TAILQ_FIRST(&reset_list); siop_cmd != NULL;
siop_cmd = next_siop_cmd) {
next_siop_cmd = TAILQ_NEXT(siop_cmd, next);
siop_cmd->cmd_c.flags &= ~CMDFL_TAG;
siop_cmd->cmd_c.xs->error =
(siop_cmd->cmd_c.flags & CMDFL_TIMEOUT)
? XS_TIMEOUT : XS_RESET;
siop_cmd->cmd_c.xs->status = SCSI_SIOP_NOCHECK;
sc_print_addr(siop_cmd->cmd_c.xs->sc_link);
printf("cmd %p (status %d) reset",
siop_cmd, siop_cmd->cmd_c.status);
if (siop_cmd->cmd_c.status == CMDST_SENSE ||
siop_cmd->cmd_c.status == CMDST_SENSE_ACTIVE)
siop_cmd->cmd_c.status = CMDST_SENSE_DONE;
else
siop_cmd->cmd_c.status = CMDST_DONE;
printf(" with status %d, xs->error %d\n",
siop_cmd->cmd_c.status, siop_cmd->cmd_c.xs->error);
TAILQ_REMOVE(&reset_list, siop_cmd, next);
siop_scsicmd_end(siop_cmd);
}
}
void *
siop_cmd_get(void *cookie)
{
struct siop_softc *sc = cookie;
struct siop_cmd *siop_cmd;
int s;
/* Look if a ccb is available. */
s = splbio();
siop_cmd = TAILQ_FIRST(&sc->free_list);
if (siop_cmd != NULL) {
TAILQ_REMOVE(&sc->free_list, siop_cmd, next);
#ifdef DIAGNOSTIC
if (siop_cmd->cmd_c.status != CMDST_FREE)
panic("siop_scsicmd: new cmd not free");
#endif
siop_cmd->cmd_c.status = CMDST_READY;
}
splx(s);
return (siop_cmd);
}
void
siop_cmd_put(void *cookie, void *io)
{
struct siop_softc *sc = cookie;
struct siop_cmd *siop_cmd = io;
int s;
s = splbio();
siop_cmd->cmd_c.status = CMDST_FREE;
TAILQ_INSERT_TAIL(&sc->free_list, siop_cmd, next);
splx(s);
}
int
siop_scsiprobe(struct scsi_link *link)
{
struct siop_softc *sc = link->bus->sb_adapter_softc;
struct siop_target *siop_target;
const int target = link->target;
const int lun = link->lun;
int i;
#ifdef SIOP_DEBUG
printf("%s:%d:%d: probe\n",
sc->sc_c.sc_dev.dv_xname, target, lun);
#endif
/* XXX locking */
siop_target = (struct siop_target*)sc->sc_c.targets[target];
if (siop_target == NULL) {
siop_target = malloc(sizeof(*siop_target), M_DEVBUF,
M_WAITOK | M_CANFAIL | M_ZERO);
if (siop_target == NULL) {
printf("%s: can't malloc memory for target %d\n",
sc->sc_c.sc_dev.dv_xname, target);
return (ENOMEM);
}
siop_target->target_c.status = TARST_PROBING;
siop_target->target_c.flags = 0;
siop_target->target_c.id =
sc->sc_c.clock_div << 24; /* scntl3 */
siop_target->target_c.id |= target << 16; /* id */
/* siop_target->target_c.id |= 0x0 << 8; scxfer is 0 */
/* get a lun switch script */
siop_target->lunsw = siop_get_lunsw(sc);
if (siop_target->lunsw == NULL) {
printf("%s: can't alloc lunsw for target %d\n",
sc->sc_c.sc_dev.dv_xname, target);
free(siop_target, M_DEVBUF, sizeof *siop_target);
return (ENOMEM);
}
for (i = 0; i < 8; i++)
siop_target->siop_lun[i] = NULL;
sc->sc_c.targets[target] =
(struct siop_common_target *)siop_target;
siop_add_reselsw(sc, target);
}
if (siop_target->siop_lun[lun] == NULL) {
siop_target->siop_lun[lun] =
malloc(sizeof(struct siop_lun), M_DEVBUF,
M_WAITOK | M_CANFAIL | M_ZERO);
if (siop_target->siop_lun[lun] == NULL) {
printf("%s: can't alloc siop_lun for "
"target %d lun %d\n",
sc->sc_c.sc_dev.dv_xname, target, lun);
return (ENOMEM);
}
}
return (0);
}
void
siop_scsicmd(struct scsi_xfer *xs)
{
struct siop_softc *sc = xs->sc_link->bus->sb_adapter_softc;
struct siop_cmd *siop_cmd;
struct siop_target *siop_target;
int s, error, i, j;
const int target = xs->sc_link->target;
const int lun = xs->sc_link->lun;
#ifdef SIOP_DEBUG_SCHED
printf("starting cmd for %d:%d\n", target, lun);
#endif
siop_target = (struct siop_target*)sc->sc_c.targets[target];
siop_cmd = xs->io;
/*
* The xs may have been restarted by the scsi layer, so ensure the ccb
* starts in the proper state.
*/
siop_cmd->cmd_c.status = CMDST_READY;
/* Always reset xs->stimeout, lest we timeout_del() with trash */
timeout_set(&xs->stimeout, siop_timeout, siop_cmd);
siop_cmd->cmd_c.siop_target = sc->sc_c.targets[target];
siop_cmd->cmd_c.xs = xs;
siop_cmd->cmd_c.flags = 0;
bzero(&siop_cmd->cmd_c.siop_tables->xscmd,
sizeof(siop_cmd->cmd_c.siop_tables->xscmd));
bcopy(&xs->cmd, &siop_cmd->cmd_c.siop_tables->xscmd, xs->cmdlen);
siop_cmd->cmd_c.siop_tables->cmd.count =
siop_htoc32(&sc->sc_c, xs->cmdlen);
/* load the DMA maps */
if (xs->flags & (SCSI_DATA_IN | SCSI_DATA_OUT)) {
error = bus_dmamap_load(sc->sc_c.sc_dmat,
siop_cmd->cmd_c.dmamap_data, xs->data, xs->datalen,
NULL, BUS_DMA_NOWAIT | BUS_DMA_STREAMING |
((xs->flags & SCSI_DATA_IN) ?
BUS_DMA_READ : BUS_DMA_WRITE));
if (error) {
printf("%s: unable to load data DMA map: %d\n",
sc->sc_c.sc_dev.dv_xname, error);
xs->error = XS_DRIVER_STUFFUP;
scsi_done(xs);
return;
}
bus_dmamap_sync(sc->sc_c.sc_dmat,
siop_cmd->cmd_c.dmamap_data, 0,
siop_cmd->cmd_c.dmamap_data->dm_mapsize,
(xs->flags & SCSI_DATA_IN) ?
BUS_DMASYNC_PREREAD : BUS_DMASYNC_PREWRITE);
}
siop_setuptables(&siop_cmd->cmd_c);
siop_cmd->saved_offset = SIOP_NOOFFSET;
siop_table_sync(siop_cmd,
BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
/* Negotiate transfer parameters on first non-polling command. */
if (((xs->flags & SCSI_POLL) == 0) &&
siop_target->target_c.status == TARST_PROBING)
siop_target->target_c.status = TARST_ASYNC;
s = splbio();
TAILQ_INSERT_TAIL(&sc->ready_list, siop_cmd, next);
siop_start(sc);
if ((xs->flags & SCSI_POLL) == 0) {
splx(s);
return;
}
/* Poll for command completion. */
for(i = xs->timeout; i > 0; i--) {
siop_intr(sc);
if ((xs->flags & ITSDONE) == 0) {
delay(1000);
continue;
}
if (xs->cmd.opcode == INQUIRY && xs->error == XS_NOERROR) {
struct scsi_inquiry_data *inqbuf =
(struct scsi_inquiry_data *)xs->data;
if ((inqbuf->device & SID_QUAL) == SID_QUAL_BAD_LU)
break;
/*
* Allocate cbd's to hold maximum openings worth of
* commands. Do this now because doing it dynamically in
* siop_startcmd may cause calls to bus_dma* functions
* in interrupt context.
*/
for (j = 0; j < SIOP_NTAG; j += SIOP_NCMDPB)
siop_morecbd(sc);
/*
* Set TARF_DT here because if it is turned off during
* PPR, it must STAY off!
*/
if ((lun == 0) && (sc->sc_c.features & SF_BUS_ULTRA3))
sc->sc_c.targets[target]->flags |= TARF_DT;
/*
* Can't do lun 0 here, because flags are not set yet.
* But have to do other lun's here because they never go
* through TARST_ASYNC.
*/
if (lun > 0)
siop_add_dev(sc, target, lun);
}
break;
}
if (i == 0) {
siop_timeout(siop_cmd);
while ((xs->flags & ITSDONE) == 0)
siop_intr(sc);
}
splx(s);
}
void
siop_start(struct siop_softc *sc)
{
struct siop_cmd *siop_cmd, *next_siop_cmd;
struct siop_lun *siop_lun;
struct siop_xfer *siop_xfer;
u_int32_t dsa;
int target, lun, tag, slot;
int newcmd = 0;
int doingready = 0;
/*
* first make sure to read valid data
*/
siop_script_sync(sc, BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
/*
* The queue management here is a bit tricky: the script always looks
* at the slot from first to last, so if we always use the first
* free slot commands can stay at the tail of the queue ~forever.
* The algorithm used here is to restart from the head when we know
* that the queue is empty, and only add commands after the last one.
* When we're at the end of the queue wait for the script to clear it.
* The best thing to do here would be to implement a circular queue,
* but using only 53c720 features this can be "interesting".
* A mid-way solution could be to implement 2 queues and swap orders.
*/
slot = sc->sc_currschedslot;
/*
* If the instruction is 0x80000000 (JUMP foo, IF FALSE) the slot is
* free. As this is the last used slot, all previous slots are free,
* we can restart from 1.
* slot 0 is reserved for request sense commands.
*/
if (siop_script_read(sc, (Ent_script_sched_slot0 / 4) + slot * 2) ==
0x80000000) {
slot = sc->sc_currschedslot = 1;
} else {
slot++;
}
/* first handle commands from the urgent list */
siop_cmd = TAILQ_FIRST(&sc->urgent_list);
again:
for (; siop_cmd != NULL; siop_cmd = next_siop_cmd) {
next_siop_cmd = TAILQ_NEXT(siop_cmd, next);
#ifdef DIAGNOSTIC
if (siop_cmd->cmd_c.status != CMDST_READY &&
siop_cmd->cmd_c.status != CMDST_SENSE)
panic("siop: non-ready cmd in ready list");
#endif
target = siop_cmd->cmd_c.xs->sc_link->target;
lun = siop_cmd->cmd_c.xs->sc_link->lun;
siop_lun =
((struct siop_target*)sc->sc_c.targets[target])->siop_lun[lun];
/* if non-tagged command active, wait */
if (siop_lun->siop_tag[0].active != NULL)
continue;
/*
* if we're in a queue full condition don't start a new
* command, unless it's a request sense
*/
if ((siop_lun->lun_flags & SIOP_LUNF_FULL) &&
siop_cmd->cmd_c.status == CMDST_READY)
continue;
/* find a free tag if needed */
if (siop_cmd->cmd_c.flags & CMDFL_TAG) {
for (tag = 1; tag < SIOP_NTAG; tag++) {
if (siop_lun->siop_tag[tag].active == NULL)
break;
}
if (tag == SIOP_NTAG) /* no free tag */
continue;
} else {
tag = 0;
}
siop_cmd->cmd_c.tag = tag;
/*
* find a free scheduler slot and load it. If it's a request
* sense we need to use slot 0.
*/
if (siop_cmd->cmd_c.status != CMDST_SENSE) {
for (; slot < SIOP_NSLOTS; slot++) {
/*
* If cmd if 0x80000000 the slot is free
*/
if (siop_script_read(sc,
(Ent_script_sched_slot0 / 4) + slot * 2) ==
0x80000000)
break;
}
/* no more free slots, no need to continue */
if (slot == SIOP_NSLOTS) {
goto end;
}
} else {
slot = 0;
if (siop_script_read(sc, Ent_script_sched_slot0 / 4)
!= 0x80000000)
goto end;
}
#ifdef SIOP_DEBUG_SCHED
printf("using slot %d for DSA 0x%lx\n", slot,
(u_long)siop_cmd->cmd_c.dsa);
#endif
/* Ok, we can add the tag message */
if (tag > 0) {
#ifdef DIAGNOSTIC
int msgcount = siop_ctoh32(&sc->sc_c,
siop_cmd->cmd_tables->t_msgout.count);
if (msgcount != 1)
printf("%s:%d:%d: tag %d with msgcount %d\n",
sc->sc_c.sc_dev.dv_xname, target, lun, tag,
msgcount);
#endif
siop_cmd->cmd_tables->msg_out[1] = MSG_SIMPLE_Q_TAG;
siop_cmd->cmd_tables->msg_out[2] = tag;
siop_cmd->cmd_tables->t_msgout.count =
siop_htoc32(&sc->sc_c, 3);
}
/* note that we started a new command */
newcmd = 1;
/* mark command as active */
if (siop_cmd->cmd_c.status == CMDST_READY) {
siop_cmd->cmd_c.status = CMDST_ACTIVE;
} else if (siop_cmd->cmd_c.status == CMDST_SENSE) {
siop_cmd->cmd_c.status = CMDST_SENSE_ACTIVE;
} else
panic("siop_start: bad status");
if (doingready)
TAILQ_REMOVE(&sc->ready_list, siop_cmd, next);
else
TAILQ_REMOVE(&sc->urgent_list, siop_cmd, next);
siop_lun->siop_tag[tag].active = siop_cmd;
/* patch scripts with DSA addr */
dsa = siop_cmd->cmd_c.dsa;
/* first reselect switch, if we have an entry */
if (siop_lun->siop_tag[tag].reseloff > 0)
siop_script_write(sc,
siop_lun->siop_tag[tag].reseloff + 1,
dsa + sizeof(struct siop_common_xfer) +
Ent_ldsa_reload_dsa);
/* CMD script: MOVE MEMORY addr */
siop_xfer = (struct siop_xfer*)siop_cmd->cmd_tables;
siop_xfer->resel[E_ldsa_abs_slot_Used[0]] =
siop_htoc32(&sc->sc_c, sc->sc_c.sc_scriptaddr +
Ent_script_sched_slot0 + slot * 8);
siop_table_sync(siop_cmd, BUS_DMASYNC_PREWRITE);
/* scheduler slot: JUMP ldsa_select */
siop_script_write(sc,
(Ent_script_sched_slot0 / 4) + slot * 2 + 1,
dsa + sizeof(struct siop_common_xfer) + Ent_ldsa_select);
/* handle timeout */
if (siop_cmd->cmd_c.status == CMDST_ACTIVE) {
if ((siop_cmd->cmd_c.xs->flags & SCSI_POLL) == 0) {
/* start expire timer */
timeout_add_msec(&siop_cmd->cmd_c.xs->stimeout,
siop_cmd->cmd_c.xs->timeout);
}
}
/*
* Change JUMP cmd so that this slot will be handled
*/
siop_script_write(sc, (Ent_script_sched_slot0 / 4) + slot * 2,
0x80080000);
/* if we're using the request sense slot, stop here */
if (slot == 0)
goto end;
sc->sc_currschedslot = slot;
slot++;
}
if (doingready == 0) {
/* now process ready list */
doingready = 1;
siop_cmd = TAILQ_FIRST(&sc->ready_list);
goto again;
}
end:
/* if nothing changed no need to flush cache and wakeup script */
if (newcmd == 0)
return;
/* make sure SCRIPT processor will read valid data */
siop_script_sync(sc,BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
/* Signal script it has some work to do */
bus_space_write_1(sc->sc_c.sc_rt, sc->sc_c.sc_rh,
SIOP_ISTAT, ISTAT_SIGP);
/* and wait for IRQ */
}
void
siop_timeout(void *v)
{
struct siop_cmd *siop_cmd = v;
struct siop_softc *sc = (struct siop_softc *)siop_cmd->cmd_c.siop_sc;
int s;
/* deactivate callout */
timeout_del(&siop_cmd->cmd_c.xs->stimeout);
sc_print_addr(siop_cmd->cmd_c.xs->sc_link);
printf("timeout on SCSI command 0x%x\n",
siop_cmd->cmd_c.xs->cmd.opcode);
s = splbio();
/* reset the scsi bus */
siop_resetbus(&sc->sc_c);
siop_cmd->cmd_c.flags |= CMDFL_TIMEOUT;
siop_handle_reset(sc);
splx(s);
}
#ifdef DUMP_SCRIPT
void
siop_dump_script(struct siop_softc *sc)
{
int i;
for (i = 0; i < PAGE_SIZE / 4; i += 2) {
printf("0x%04x: 0x%08x 0x%08x", i * 4,
siop_ctoh32(&sc->sc_c, sc->sc_c.sc_script[i]),
siop_ctoh32(&sc->sc_c, sc->sc_c.sc_script[i+1]));
if ((siop_ctoh32(&sc->sc_c,
sc->sc_c.sc_script[i]) & 0xe0000000) == 0xc0000000) {
i++;
printf(" 0x%08x", siop_ctoh32(&sc->sc_c,
sc->sc_c.sc_script[i+1]));
}
printf("\n");
}
}
#endif
void
siop_morecbd(struct siop_softc *sc)
{
int error, off, i, j, s;
struct siop_cbd *newcbd;
struct siop_xfer *xfers, *xfer;
bus_addr_t dsa;
u_int32_t *scr;
size_t sense_size = roundup(sizeof(struct scsi_sense_data), 16);
/* allocate a new list head */
newcbd = malloc(sizeof(struct siop_cbd), M_DEVBUF, M_NOWAIT | M_ZERO);
if (newcbd == NULL) {
printf("%s: can't allocate memory for command descriptors "
"head\n", sc->sc_c.sc_dev.dv_xname);
return;
}
/* allocate cmd list */
newcbd->cmds = mallocarray(SIOP_NCMDPB, sizeof(struct siop_cmd),
M_DEVBUF, M_NOWAIT | M_ZERO);
if (newcbd->cmds == NULL) {
printf("%s: can't allocate memory for command descriptors\n",
sc->sc_c.sc_dev.dv_xname);
goto bad3;
}
newcbd->xfers = siop_dmamem_alloc(sc, PAGE_SIZE);
if (newcbd->xfers == NULL) {
printf("%s: unable to allocate cbd xfer DMA memory\n",
sc->sc_c.sc_dev.dv_xname);
goto bad2;
}
xfers = SIOP_DMA_KVA(newcbd->xfers);
newcbd->sense = siop_dmamem_alloc(sc, sense_size * SIOP_NCMDPB);
if (newcbd->sense == NULL) {
printf("%s: unable to allocate cbd sense DMA memory\n",
sc->sc_c.sc_dev.dv_xname);
goto bad1;
}
for (i = 0; i < SIOP_NCMDPB; i++) {
error = bus_dmamap_create(sc->sc_c.sc_dmat, MAXPHYS, SIOP_NSG,
MAXPHYS, 0, BUS_DMA_NOWAIT | BUS_DMA_ALLOCNOW,
&newcbd->cmds[i].cmd_c.dmamap_data);
if (error) {
printf("%s: unable to create data DMA map for cbd: "
"error %d\n",
sc->sc_c.sc_dev.dv_xname, error);
goto bad0;
}
}
/* Use two loops since bailing out above releases allocated memory */
off = (sc->sc_c.features & SF_CHIP_BE) ? 3 : 0;
for (i = 0; i < SIOP_NCMDPB; i++) {
newcbd->cmds[i].cmd_c.siop_sc = &sc->sc_c;
newcbd->cmds[i].siop_cbdp = newcbd;
xfer = &xfers[i];
newcbd->cmds[i].cmd_tables = (struct siop_common_xfer *)xfer;
bzero(newcbd->cmds[i].cmd_tables, sizeof(struct siop_xfer));
dsa = SIOP_DMA_DVA(newcbd->xfers) +
i * sizeof(struct siop_xfer);
newcbd->cmds[i].cmd_c.dsa = dsa;
newcbd->cmds[i].cmd_c.status = CMDST_FREE;
newcbd->cmds[i].cmd_c.sense = (struct scsi_sense_data *)(
i * sense_size +
(u_int8_t *)SIOP_DMA_KVA(newcbd->sense));
xfer->siop_tables.t_msgout.count= siop_htoc32(&sc->sc_c, 1);
xfer->siop_tables.t_msgout.addr = siop_htoc32(&sc->sc_c, dsa);
xfer->siop_tables.t_msgin.count= siop_htoc32(&sc->sc_c, 1);
xfer->siop_tables.t_msgin.addr = siop_htoc32(&sc->sc_c,
dsa + offsetof(struct siop_common_xfer, msg_in));
xfer->siop_tables.t_extmsgin.count= siop_htoc32(&sc->sc_c, 2);
xfer->siop_tables.t_extmsgin.addr = siop_htoc32(&sc->sc_c,
dsa + offsetof(struct siop_common_xfer, msg_in) + 1);
xfer->siop_tables.t_extmsgdata.addr = siop_htoc32(&sc->sc_c,
dsa + offsetof(struct siop_common_xfer, msg_in) + 3);
xfer->siop_tables.t_status.count= siop_htoc32(&sc->sc_c, 1);
xfer->siop_tables.t_status.addr = siop_htoc32(&sc->sc_c,
dsa + offsetof(struct siop_common_xfer, status) + off);
xfer->siop_tables.cmd.count = siop_htoc32(&sc->sc_c, 0);
xfer->siop_tables.cmd.addr = siop_htoc32(&sc->sc_c,
dsa + offsetof(struct siop_common_xfer, xscmd));
/* The select/reselect script */
scr = &xfer->resel[0];
for (j = 0; j < sizeof(load_dsa) / sizeof(load_dsa[0]); j++)
scr[j] = siop_htoc32(&sc->sc_c, load_dsa[j]);
/*
* 0x78000000 is a 'move data8 to reg'. data8 is the second
* octet, reg offset is the third.
*/
scr[Ent_rdsa0 / 4] = siop_htoc32(&sc->sc_c,
0x78100000 | ((dsa & 0x000000ff) << 8));
scr[Ent_rdsa1 / 4] = siop_htoc32(&sc->sc_c,
0x78110000 | ( dsa & 0x0000ff00 ));
scr[Ent_rdsa2 / 4] = siop_htoc32(&sc->sc_c,
0x78120000 | ((dsa & 0x00ff0000) >> 8));
scr[Ent_rdsa3 / 4] = siop_htoc32(&sc->sc_c,
0x78130000 | ((dsa & 0xff000000) >> 16));
scr[E_ldsa_abs_reselected_Used[0]] = siop_htoc32(&sc->sc_c,
sc->sc_c.sc_scriptaddr + Ent_reselected);
scr[E_ldsa_abs_reselect_Used[0]] = siop_htoc32(&sc->sc_c,
sc->sc_c.sc_scriptaddr + Ent_reselect);
scr[E_ldsa_abs_selected_Used[0]] = siop_htoc32(&sc->sc_c,
sc->sc_c.sc_scriptaddr + Ent_selected);
scr[E_ldsa_abs_data_Used[0]] = siop_htoc32(&sc->sc_c,
dsa + sizeof(struct siop_common_xfer) + Ent_ldsa_data);
/* JUMP foo, IF FALSE - used by MOVE MEMORY to clear the slot */
scr[Ent_ldsa_data / 4] = siop_htoc32(&sc->sc_c, 0x80000000);
s = splbio();
TAILQ_INSERT_TAIL(&sc->free_list, &newcbd->cmds[i], next);
splx(s);
#ifdef SIOP_DEBUG
printf("tables[%d]: in=0x%x out=0x%x status=0x%x\n",
i,
siop_ctoh32(&sc->sc_c,
newcbd->cmds[i].cmd_tables->t_msgin.addr),
siop_ctoh32(&sc->sc_c,
newcbd->cmds[i].cmd_tables->t_msgout.addr),
siop_ctoh32(&sc->sc_c,
newcbd->cmds[i].cmd_tables->t_status.addr));
#endif
}
s = splbio();
TAILQ_INSERT_TAIL(&sc->cmds, newcbd, next);
splx(s);
return;
bad0:
while (--i >= 0) {
bus_dmamap_destroy(sc->sc_c.sc_dmat,
newcbd->cmds[i].cmd_c.dmamap_data);
}
siop_dmamem_free(sc, newcbd->sense);
bad1:
siop_dmamem_free(sc, newcbd->xfers);
bad2:
free(newcbd->cmds, M_DEVBUF, SIOP_NCMDPB * sizeof(struct siop_cmd));
bad3:
free(newcbd, M_DEVBUF, sizeof *newcbd);
}
struct siop_lunsw *
siop_get_lunsw(struct siop_softc *sc)
{
struct siop_lunsw *lunsw;
int i;
if (sc->script_free_lo + (sizeof(lun_switch) / sizeof(lun_switch[0])) >=
sc->script_free_hi)
return NULL;
lunsw = TAILQ_FIRST(&sc->lunsw_list);
if (lunsw != NULL) {
#ifdef SIOP_DEBUG
printf("siop_get_lunsw got lunsw at offset %d\n",
lunsw->lunsw_off);
#endif
TAILQ_REMOVE(&sc->lunsw_list, lunsw, next);
return lunsw;
}
lunsw = malloc(sizeof(struct siop_lunsw), M_DEVBUF, M_NOWAIT | M_ZERO);
if (lunsw == NULL)
return NULL;
#ifdef SIOP_DEBUG
printf("allocating lunsw at offset %d\n", sc->script_free_lo);
#endif
if (sc->sc_c.features & SF_CHIP_RAM) {
bus_space_write_region_4(sc->sc_c.sc_ramt, sc->sc_c.sc_ramh,
sc->script_free_lo * 4, lun_switch,
sizeof(lun_switch) / sizeof(lun_switch[0]));
bus_space_write_4(sc->sc_c.sc_ramt, sc->sc_c.sc_ramh,
(sc->script_free_lo + E_abs_lunsw_return_Used[0]) * 4,
sc->sc_c.sc_scriptaddr + Ent_lunsw_return);
} else {
for (i = 0; i < sizeof(lun_switch) / sizeof(lun_switch[0]);
i++)
sc->sc_c.sc_script[sc->script_free_lo + i] =
siop_htoc32(&sc->sc_c, lun_switch[i]);
sc->sc_c.sc_script[
sc->script_free_lo + E_abs_lunsw_return_Used[0]] =
siop_htoc32(&sc->sc_c,
sc->sc_c.sc_scriptaddr + Ent_lunsw_return);
}
lunsw->lunsw_off = sc->script_free_lo;
lunsw->lunsw_size = sizeof(lun_switch) / sizeof(lun_switch[0]);
sc->script_free_lo += lunsw->lunsw_size;
siop_script_sync(sc, BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
return lunsw;
}
void
siop_add_reselsw(struct siop_softc *sc, int target)
{
int i,j;
struct siop_target *siop_target;
struct siop_lun *siop_lun;
siop_target = (struct siop_target *)sc->sc_c.targets[target];
/*
* add an entry to resel switch
*/
siop_script_sync(sc, BUS_DMASYNC_POSTWRITE);
for (i = 0; i < 15; i++) {
siop_target->reseloff = Ent_resel_targ0 / 4 + i * 2;
if ((siop_script_read(sc, siop_target->reseloff) & 0xff)
== 0xff) { /* it's free */
#ifdef SIOP_DEBUG
printf("siop: target %d slot %d offset %d\n",
target, i, siop_target->reseloff);
#endif
/* JUMP abs_foo, IF target | 0x80; */
siop_script_write(sc, siop_target->reseloff,
0x800c0080 | target);
siop_script_write(sc, siop_target->reseloff + 1,
sc->sc_c.sc_scriptaddr +
siop_target->lunsw->lunsw_off * 4 +
Ent_lun_switch_entry);
break;
}
}
if (i == 15) /* no free slot, shouldn't happen */
panic("siop: resel switch full");
sc->sc_ntargets++;
for (i = 0; i < 8; i++) {
siop_lun = siop_target->siop_lun[i];
if (siop_lun == NULL)
continue;
if (siop_lun->reseloff > 0) {
siop_lun->reseloff = 0;
for (j = 0; j < SIOP_NTAG; j++)
siop_lun->siop_tag[j].reseloff = 0;
siop_add_dev(sc, target, i);
}
}
siop_update_scntl3(sc, sc->sc_c.targets[target]);
siop_script_sync(sc, BUS_DMASYNC_PREWRITE);
}
void
siop_update_scntl3(struct siop_softc *sc,
struct siop_common_target *_siop_target)
{
struct siop_target *siop_target = (struct siop_target *)_siop_target;
/* MOVE target->id >> 24 TO SCNTL3 */
siop_script_write(sc,
siop_target->lunsw->lunsw_off + (Ent_restore_scntl3 / 4),
0x78030000 | ((siop_target->target_c.id >> 16) & 0x0000ff00));
/* MOVE target->id >> 8 TO SXFER */
siop_script_write(sc,
siop_target->lunsw->lunsw_off + (Ent_restore_scntl3 / 4) + 2,
0x78050000 | (siop_target->target_c.id & 0x0000ff00));
siop_script_sync(sc, BUS_DMASYNC_PREWRITE);
}
void
siop_add_dev(struct siop_softc *sc, int target, int lun)
{
struct siop_lunsw *lunsw;
struct siop_target *siop_target =
(struct siop_target *)sc->sc_c.targets[target];
struct siop_lun *siop_lun = siop_target->siop_lun[lun];
int i, ntargets, buswidth;
if (siop_lun->reseloff > 0)
return;
lunsw = siop_target->lunsw;
if ((lunsw->lunsw_off + lunsw->lunsw_size) < sc->script_free_lo) {
/*
* can't extend this slot. Probably not worth trying to deal
* with this case
*/
#ifdef SIOP_DEBUG
printf("%s:%d:%d: can't allocate a lun sw slot\n",
sc->sc_c.sc_dev.dv_xname, target, lun);
#endif
return;
}
/* count how many free targets we still have to probe */
buswidth = (sc->sc_c.features & SF_BUS_WIDE) ? 16 : 8;
ntargets = (buswidth - 1) - 1 - sc->sc_ntargets;
/*
* we need 8 bytes for the lun sw additional entry, and
* eventually sizeof(tag_switch) for the tag switch entry.
* Keep enough free space for the free targets that could be
* probed later.
*/
if (sc->script_free_lo + 2 +
(ntargets * sizeof(lun_switch) / sizeof(lun_switch[0])) >=
((siop_target->target_c.flags & TARF_TAG) ?
sc->script_free_hi - (sizeof(tag_switch) / sizeof(tag_switch[0])) :
sc->script_free_hi)) {
/*
* not enough space, probably not worth dealing with it.
* We can hold 13 tagged-queuing capable devices in the 4k RAM.
*/
#ifdef SIOP_DEBUG
printf("%s:%d:%d: not enough memory for a lun sw slot\n",
sc->sc_c.sc_dev.dv_xname, target, lun);
#endif
return;
}
#ifdef SIOP_DEBUG
printf("%s:%d:%d: allocate lun sw entry\n",
sc->sc_c.sc_dev.dv_xname, target, lun);
#endif
/* INT int_resellun */
siop_script_write(sc, sc->script_free_lo, 0x98080000);
siop_script_write(sc, sc->script_free_lo + 1, A_int_resellun);
/* Now the slot entry: JUMP abs_foo, IF lun */
siop_script_write(sc, sc->script_free_lo - 2,
0x800c0000 | lun);
siop_script_write(sc, sc->script_free_lo - 1, 0);
siop_lun->reseloff = sc->script_free_lo - 2;
lunsw->lunsw_size += 2;
sc->script_free_lo += 2;
if (siop_target->target_c.flags & TARF_TAG) {
/* we need a tag switch */
sc->script_free_hi -=
sizeof(tag_switch) / sizeof(tag_switch[0]);
if (sc->sc_c.features & SF_CHIP_RAM) {
bus_space_write_region_4(sc->sc_c.sc_ramt,
sc->sc_c.sc_ramh,
sc->script_free_hi * 4, tag_switch,
sizeof(tag_switch) / sizeof(tag_switch[0]));
} else {
for(i = 0;
i < sizeof(tag_switch) / sizeof(tag_switch[0]);
i++) {
sc->sc_c.sc_script[sc->script_free_hi + i] =
siop_htoc32(&sc->sc_c, tag_switch[i]);
}
}
siop_script_write(sc,
siop_lun->reseloff + 1,
sc->sc_c.sc_scriptaddr + sc->script_free_hi * 4 +
Ent_tag_switch_entry);
for (i = 0; i < SIOP_NTAG; i++) {
siop_lun->siop_tag[i].reseloff =
sc->script_free_hi + (Ent_resel_tag0 / 4) + i * 2;
}
} else {
/* non-tag case; just work with the lun switch */
siop_lun->siop_tag[0].reseloff =
siop_target->siop_lun[lun]->reseloff;
}
siop_script_sync(sc, BUS_DMASYNC_PREWRITE);
}
void
siop_scsifree(struct scsi_link *link)
{
struct siop_softc *sc = link->bus->sb_adapter_softc;
int target = link->target;
int lun = link->lun;
int i;
struct siop_target *siop_target;
#ifdef SIOP_DEBUG
printf("%s:%d:%d: free lun sw entry\n",
sc->sc_c.sc_dev.dv_xname, target, lun);
#endif
siop_target = (struct siop_target *)sc->sc_c.targets[target];
free(siop_target->siop_lun[lun], M_DEVBUF, 0);
siop_target->siop_lun[lun] = NULL;
/* XXX compact sw entry too ? */
/* check if we can free the whole target */
for (i = 0; i < 8; i++) {
if (siop_target->siop_lun[i] != NULL)
return;
}
#ifdef SIOP_DEBUG
printf("%s: free siop_target for target %d lun %d lunsw offset %d\n",
sc->sc_c.sc_dev.dv_xname, target, lun,
siop_target->lunsw->lunsw_off);
#endif
/*
* nothing here, free the target struct and resel
* switch entry
*/
siop_script_write(sc, siop_target->reseloff, 0x800c00ff);
siop_script_sync(sc, BUS_DMASYNC_PREWRITE);
TAILQ_INSERT_TAIL(&sc->lunsw_list, siop_target->lunsw, next);
free(sc->sc_c.targets[target], M_DEVBUF, 0);
sc->sc_c.targets[target] = NULL;
sc->sc_ntargets--;
}
#ifdef SIOP_STATS
void
siop_printstats(void)
{
printf("siop_stat_intr %d\n", siop_stat_intr);
printf("siop_stat_intr_shortxfer %d\n", siop_stat_intr_shortxfer);
printf("siop_stat_intr_xferdisc %d\n", siop_stat_intr_xferdisc);
printf("siop_stat_intr_sdp %d\n", siop_stat_intr_sdp);
printf("siop_stat_intr_saveoffset %d\n", siop_stat_intr_saveoffset);
printf("siop_stat_intr_done %d\n", siop_stat_intr_done);
printf("siop_stat_intr_lunresel %d\n", siop_stat_intr_lunresel);
printf("siop_stat_intr_qfull %d\n", siop_stat_intr_qfull);
}
#endif
struct siop_dmamem *
siop_dmamem_alloc(struct siop_softc *sc, size_t size)
{
struct siop_dmamem *sdm;
int nsegs;
sdm = malloc(sizeof(*sdm), M_DEVBUF, M_NOWAIT | M_ZERO);
if (sdm == NULL)
return (NULL);
sdm->sdm_size = size;
if (bus_dmamap_create(sc->sc_c.sc_dmat, size, 1, size, 0,
BUS_DMA_NOWAIT | BUS_DMA_ALLOCNOW, &sdm->sdm_map) != 0)
goto sdmfree;
if (bus_dmamem_alloc(sc->sc_c.sc_dmat, size, PAGE_SIZE, 0,
&sdm->sdm_seg, 1, &nsegs, BUS_DMA_NOWAIT | BUS_DMA_ZERO) != 0)
goto destroy;
if (bus_dmamem_map(sc->sc_c.sc_dmat, &sdm->sdm_seg, nsegs, size,
&sdm->sdm_kva, BUS_DMA_NOWAIT | BUS_DMA_COHERENT) != 0)
goto free;
if (bus_dmamap_load(sc->sc_c.sc_dmat, sdm->sdm_map, sdm->sdm_kva,
size, NULL, BUS_DMA_NOWAIT) != 0)
goto unmap;
return (sdm);
unmap:
bus_dmamem_unmap(sc->sc_c.sc_dmat, sdm->sdm_kva, size);
free:
bus_dmamem_free(sc->sc_c.sc_dmat, &sdm->sdm_seg, 1);
destroy:
bus_dmamap_destroy(sc->sc_c.sc_dmat, sdm->sdm_map);
sdmfree:
free(sdm, M_DEVBUF, sizeof *sdm);
return (NULL);
}
void
siop_dmamem_free(struct siop_softc *sc, struct siop_dmamem *sdm)
{
bus_dmamap_unload(sc->sc_c.sc_dmat, sdm->sdm_map);
bus_dmamem_unmap(sc->sc_c.sc_dmat, sdm->sdm_kva, sdm->sdm_size);
bus_dmamem_free(sc->sc_c.sc_dmat, &sdm->sdm_seg, 1);
bus_dmamap_destroy(sc->sc_c.sc_dmat, sdm->sdm_map);
free(sdm, M_DEVBUF, sizeof *sdm);
}
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