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pmon/sys/dev/ic/siop.c

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/* $OpenBSD: siop.c,v 1.17 2001/11/05 17:25:58 art Exp $ */
/* $NetBSD: siop.c,v 1.39 2001/02/11 18:04:49 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Manuel Bouyer
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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/buf.h>
#include <sys/kernel.h>
#include <machine/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.h>
#include <dev/ic/siopvar_common.h>
#undef DEBUG
#define DIAGNOSTIC
#define SIOP_DEBUG
#define SIOP_DEBUG_DR
#define SIOP_DEBUG_INTR
#define SIOP_DEBUG_SCHED
#define SIOP_DEBUG_SINGLE_STEP
#ifndef DEBUG
#undef DEBUG
#undef DIAGNOSTIC
#undef SIOP_DEBUG
#undef SIOP_DEBUG_DR
#undef SIOP_DEBUG_INTR
#undef SIOP_DEBUG_SCHED
#undef SIOP_DEBUG_SINGLE_STEP
#undef DUMP_SCRIPT
#endif
#define 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 slots (needs to match script) */
#define SIOP_NSLOTS 40
void siop_reset __P((struct siop_softc *));
void siop_handle_reset __P((struct siop_softc *));
int siop_handle_qtag_reject __P((struct siop_cmd *));
void siop_scsicmd_end __P((struct siop_cmd *));
void siop_start __P((struct siop_softc *));
void siop_timeout __P((void *));
int siop_scsicmd __P((struct scsi_xfer *));
void siop_dump_script __P((struct siop_softc *));
int siop_morecbd __P((struct siop_softc *));
struct siop_lunsw *siop_get_lunsw __P((struct siop_softc *));
void siop_add_reselsw __P((struct siop_softc *, int));
void siop_update_scntl3 __P((struct siop_softc *, struct siop_target *));
struct cfdriver siop_cd = {
NULL, "siop", DV_DULL
};
struct scsi_adapter siop_adapter = {
siop_scsicmd,
siop_minphys,
NULL,
NULL,
};
struct scsi_device siop_dev = {
NULL,
NULL,
NULL,
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_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 __P((void));
#define INCSTAT(x) x++
#else
#define INCSTAT(x)
#endif
static __inline__ void siop_script_sync __P((struct siop_softc *, int));
static __inline__ void
siop_script_sync(sc, ops)
struct siop_softc *sc;
int ops;
{
if ((sc->features & SF_CHIP_RAM) == 0)
bus_dmamap_sync(sc->sc_dmat, sc->sc_scriptdma,
0, PAGE_SIZE, ops);
}
static __inline__ u_int32_t siop_script_read __P((struct siop_softc *, u_int));
static __inline__ u_int32_t
siop_script_read(sc, offset)
struct siop_softc *sc;
u_int offset;
{
if (sc->features & SF_CHIP_RAM) {
return bus_space_read_4(sc->sc_ramt, sc->sc_ramh, offset * 4);
} else {
return letoh32(sc->sc_script[offset]);
}
}
static __inline__ void siop_script_write __P((struct siop_softc *, u_int,
u_int32_t));
static __inline__ void
siop_script_write(sc, offset, val)
struct siop_softc *sc;
u_int offset;
u_int32_t val;
{
if (sc->features & SF_CHIP_RAM) {
bus_space_write_4(sc->sc_ramt, sc->sc_ramh, offset * 4, val);
} else {
sc->sc_script[offset] = htole32(val);
}
}
void
siop_attach(sc)
struct siop_softc *sc;
{
int error, i;
bus_dma_segment_t seg;
int rseg;
/*
* Allocate DMA-safe memory for the script and map it.
*/
if ((sc->features & SF_CHIP_RAM) == 0) {
error = bus_dmamem_alloc(sc->sc_dmat, PAGE_SIZE,
PAGE_SIZE, 0, &seg, 1, &rseg, BUS_DMA_NOWAIT);
if (error) {
printf("%s: unable to allocate script DMA memory, "
"error = %d\n", sc->sc_dev.dv_xname, error);
return;
}
error = bus_dmamem_map(sc->sc_dmat, &seg, rseg, PAGE_SIZE,
(caddr_t *)&sc->sc_script, BUS_DMA_NOWAIT|BUS_DMA_COHERENT);
if (error) {
printf("%s: unable to map script DMA memory, "
"error = %d\n", sc->sc_dev.dv_xname, error);
return;
}
error = bus_dmamap_create(sc->sc_dmat, PAGE_SIZE, 1,
PAGE_SIZE, 0, BUS_DMA_NOWAIT, &sc->sc_scriptdma);
if (error) {
printf("%s: unable to create script DMA map, "
"error = %d\n", sc->sc_dev.dv_xname, error);
return;
}
error = bus_dmamap_load(sc->sc_dmat, sc->sc_scriptdma,
sc->sc_script, PAGE_SIZE, NULL, BUS_DMA_NOWAIT);
if (error) {
printf("%s: unable to load script DMA map, "
"error = %d\n", sc->sc_dev.dv_xname, error);
return;
}
sc->sc_scriptaddr = sc->sc_scriptdma->dm_segs[0].ds_addr;
sc->ram_size = PAGE_SIZE;
}
TAILQ_INIT(&sc->free_list);
TAILQ_INIT(&sc->ready_list);
TAILQ_INIT(&sc->urgent_list);
TAILQ_INIT(&sc->cmds);
TAILQ_INIT(&sc->lunsw_list);
sc->sc_currschedslot = 0;
#ifdef SIOP_DEBUG
printf("%s: script size = %d, PHY addr=0x%x, VIRT=%p\n",
sc->sc_dev.dv_xname, (int)sizeof(siop_script),
(u_int32_t)sc->sc_scriptaddr, sc->sc_script);
#endif
/* Start with one page worth of commands */
siop_morecbd(sc);
/*
* sc->sc_link is the template for all device sc_link's
* for devices attached to this adapter. It is passed to
* the upper layers in config_found().
*/
sc->sc_link.adapter_softc = sc;
sc->sc_link.openings = SIOP_OPENINGS;
sc->sc_link.adapter_buswidth =
(sc->features & SF_BUS_WIDE) ? 16 : 8;
sc->sc_link.adapter_target = bus_space_read_1(sc->sc_rt,
sc->sc_rh, SIOP_SCID);
if (sc->sc_link.adapter_target == 0 ||
sc->sc_link.adapter_target >=
sc->sc_link.adapter_buswidth)
sc->sc_link.adapter_target = SIOP_DEFAULT_TARGET;
sc->sc_link.adapter = &siop_adapter;
sc->sc_link.device = &siop_dev;
sc->sc_link.flags = 0;
sc->sc_link.quirks = 0;
if ((sc->features & SF_BUS_WIDE) == 0)
sc->sc_link.quirks |= SDEV_NOWIDE;
for (i = 0; i < 16; i++)
sc->targets[i] = NULL;
/* find min_dt_sync and min_st_sync for this chip */
sc->min_dt_sync = 0;
for (i = 0; i < sizeof(period_factor) / sizeof(period_factor[0]); i++)
if (period_factor[i].scf[sc->scf_index].dt_scf != 0) {
sc->min_dt_sync = period_factor[i].factor;
break;
}
sc->min_st_sync = 0;
for (i = 0; i < sizeof(period_factor) / sizeof(period_factor[0]); i++)
if (period_factor[i].scf[sc->scf_index].st_scf != 0) {
sc->min_st_sync = period_factor[i].factor;
break;
}
if (sc->min_st_sync == 0)
panic("%s: can't find minimum allowed sync period factor\n", sc->sc_dev.dv_xname);
/* Do a bus reset, so that devices fall back to narrow/async */
siop_resetbus(sc);
/*
* siop_reset() will reset the chip, thus clearing pending interrupts
*/
siop_reset(sc);
#ifdef DUMP_SCRIPT
siop_dump_script(sc);
#endif
config_found((struct device*)sc, &sc->sc_link, scsiprint);
}
void
siop_reset(sc)
struct siop_softc *sc;
{
int i, j;
struct siop_lunsw *lunsw;
siop_common_reset(sc);
/* copy and patch the script */
#ifdef SIOP_DEBUG
printf("%s: downloading script...\n", sc->sc_dev.dv_xname);
#endif
if (sc->features & SF_CHIP_RAM) {
#ifdef SIOP_DEBUG
printf("%s: sc->sc_ramh is 0x%08x...\n",
sc->sc_dev.dv_xname, sc->sc_ramh);
#endif
bus_space_write_region_4(sc->sc_ramt, sc->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_ramt, sc->sc_ramh,
E_abs_msgin_Used[j] * 4,
sc->sc_scriptaddr + Ent_msgin_space);
}
#ifdef SIOP_DEBUG
printf("%s: script download done...\n", sc->sc_dev.dv_xname);
#endif
} else {
for (j = 0;
j < (sizeof(siop_script) / sizeof(siop_script[0])); j++) {
sc->sc_script[j] = htole32(siop_script[j]);
}
for (j = 0; j <
(sizeof(E_abs_msgin_Used) / sizeof(E_abs_msgin_Used[0]));
j++) {
sc->sc_script[E_abs_msgin_Used[j]] =
htole32(sc->sc_scriptaddr + Ent_msgin_space);
}
}
sc->script_free_lo = sizeof(siop_script) / sizeof(siop_script[0]);
sc->script_free_hi = sc->ram_size / 4;
/* 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_dev.dv_xname, lunsw->lunsw_off);
#endif
TAILQ_REMOVE(&sc->lunsw_list, lunsw, next);
free(lunsw, M_DEVBUF);
}
TAILQ_INIT(&sc->lunsw_list);
/* restore reselect switch */
for (i = 0; i < sc->sc_link.adapter_buswidth; i++) {
if (sc->targets[i] == NULL)
continue;
#ifdef SIOP_DEBUG
printf("%s: restore sw for target %d\n",
sc->sc_dev.dv_xname, i);
#endif
free(sc->targets[i]->lunsw, M_DEVBUF);
sc->targets[i]->lunsw = siop_get_lunsw(sc);
if (sc->targets[i]->lunsw == NULL) {
printf("%s: can't alloc lunsw for target %d\n",
sc->sc_dev.dv_xname, i);
break;
}
siop_add_reselsw(sc, i);
}
/* start script */
#ifdef SIOP_DEBUG
printf("%s: starting script @ 0x%08x...\n",
sc->sc_dev.dv_xname, sc->sc_scriptaddr + Ent_reselect);
#endif
siop_script_sync(sc, BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
#ifdef SIOP_DEBUG_SINGLE_STEP
bus_space_write_1(sc->sc_rt, sc->sc_rh, SIOP_DCNTL,
bus_space_read_1(sc->sc_rt, sc->sc_rh, SIOP_DCNTL) | DCNTL_SSM);
#endif
bus_space_write_4(sc->sc_rt, sc->sc_rh, SIOP_DSP,
sc->sc_scriptaddr + Ent_reselect);
#ifdef SIOP_DEBUG_SINGLE_STEP
bus_space_write_1(sc->sc_rt, sc->sc_rh, SIOP_DCNTL,
bus_space_read_1(sc->sc_rt, sc->sc_rh, SIOP_DCNTL) | DCNTL_STD);
#endif
#ifdef SIOP_DEBUG
printf("%s: script started...\n", sc->sc_dev.dv_xname);
#endif
}
#ifdef DEBUG
#ifdef SIOP_DEBUG_SINGLE_STEP
#define CALL_SCRIPT(ent) do {\
printf ("start script DSA 0x%lx DSP 0x%lx\n", \
siop_cmd->dsa, \
sc->sc_scriptaddr + ent); \
bus_space_write_4(sc->sc_rt, sc->sc_rh, SIOP_DSP, sc->sc_scriptaddr + ent); \
bus_space_write_1(sc->sc_rt, sc->sc_rh, SIOP_DCNTL, bus_space_read_1(sc->sc_rt, sc->sc_rh, SIOP_DCNTL) | DCNTL_STD); \
} while (0)
#else
#define CALL_SCRIPT(ent) do {\
printf ("start script DSA 0x%lx DSP 0x%lx\n", \
siop_cmd->dsa, \
sc->sc_scriptaddr + ent); \
bus_space_write_4(sc->sc_rt, sc->sc_rh, SIOP_DSP, sc->sc_scriptaddr + ent); \
} while (0)
#endif
#else
#define CALL_SCRIPT(ent) do {\
bus_space_write_4(sc->sc_rt, sc->sc_rh, SIOP_DSP, sc->sc_scriptaddr + ent); \
} while (0)
#endif
int
siop_intr(v)
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 = 0, sstat1 = 0, dstat = 0;
u_int32_t irqcode = 0;
int need_reset = 0;
int offset, target, lun, tag;
bus_addr_t dsa;
struct siop_cbd *cbdp;
int freetarget = 0;
int restart = 0;
istat = bus_space_read_1(sc->sc_rt, sc->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_rt, sc->sc_rh, SIOP_ISTAT, ISTAT_INTF);
}
/* use DSA to find the current siop_cmd */
dsa = bus_space_read_4(sc->sc_rt, sc->sc_rh, SIOP_DSA);
for (cbdp = TAILQ_FIRST(&sc->cmds); cbdp != NULL;
cbdp = TAILQ_NEXT(cbdp, next)) {
if (dsa >= cbdp->xferdma->dm_segs[0].ds_addr &&
dsa < cbdp->xferdma->dm_segs[0].ds_addr + PAGE_SIZE) {
dsa -= cbdp->xferdma->dm_segs[0].ds_addr;
siop_cmd = &cbdp->cmds[dsa / sizeof(struct siop_xfer)];
siop_table_sync(siop_cmd,
BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
break;
}
}
if (cbdp == NULL) {
siop_cmd = NULL;
}
if (siop_cmd) {
xs = siop_cmd->xs;
siop_target = siop_cmd->siop_target;
target = siop_cmd->xs->sc_link->target;
lun = siop_cmd->xs->sc_link->lun;
tag = siop_cmd->tag;
siop_lun = siop_target->siop_lun[lun];
#ifdef DIAGNOSTIC
if (siop_cmd->status != CMDST_ACTIVE &&
siop_cmd->status != CMDST_SENSE_ACTIVE) {
printf("siop_cmd (lun %d) not active (%d)\n",
lun, siop_cmd->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_rt, sc->sc_rh, SIOP_DSTAT);
#ifdef DIAGNOSTIC
printf("DSTAT: 0x%02x\n", dstat);
#endif
if (dstat & DSTAT_SSI) {
printf("single step dsp 0x%08x dsa 0x%08x\n",
bus_space_read_4(sc->sc_rt, sc->sc_rh, SIOP_DSP),
bus_space_read_4(sc->sc_rt, sc->sc_rh, SIOP_DSA));
if ( bus_space_read_4(sc->sc_rt, sc->sc_rh, SIOP_DSP) < 0xc0000000) {
printf("* uncached inst 0x%08x 0x%08x\n",
*(uint32_t*)(bus_space_read_4(sc->sc_rt, sc->sc_rh, SIOP_DSP) + 0xa0000000),
*(uint32_t*)(bus_space_read_4(sc->sc_rt, sc->sc_rh, SIOP_DSP) + 0xa0000004));
printf("* cached inst 0x%08x 0x%08x\n",
*(uint32_t*)(bus_space_read_4(sc->sc_rt, sc->sc_rh, SIOP_DSP) + 0x80000000),
*(uint32_t*)(bus_space_read_4(sc->sc_rt, sc->sc_rh, SIOP_DSP) + 0x80000004));
} else {
printf("* inst 0x%08x 0x%08x\n",
siop_script_read(sc,
(bus_space_read_4(sc->sc_rt, sc->sc_rh, SIOP_DSP) - sc->sc_scriptaddr) / 4),
siop_script_read(sc,
(bus_space_read_4(sc->sc_rt, sc->sc_rh, SIOP_DSP) - sc->sc_scriptaddr) / 4 + 1));
}
if ((dstat & ~(DSTAT_DFE | DSTAT_SSI)) == 0 &&
(istat & ISTAT_SIP) == 0) {
bus_space_write_1(sc->sc_rt, sc->sc_rh,
SIOP_DCNTL, bus_space_read_1(sc->sc_rt,
sc->sc_rh, SIOP_DCNTL) | DCNTL_STD);
}
return 1;
}
if (dstat & ~(DSTAT_SIR | DSTAT_DFE | DSTAT_SSI)) {
printf("DMA IRQ:");
if (dstat & DSTAT_IID)
printf("Illegal instruction");
if (dstat & DSTAT_ABRT)
printf(" abort");
if (dstat & DSTAT_BF)
printf(" bus fault");
if (dstat & DSTAT_MDPE)
printf(" parity");
if (dstat & DSTAT_DFE)
printf(" dma fifo empty");
printf(", DSP=0x%x DSA=0x%x: ",
bus_space_read_4(sc->sc_rt, sc->sc_rh, SIOP_DSP),
bus_space_read_4(sc->sc_rt, sc->sc_rh, SIOP_DSA));
if (siop_cmd)
printf("last msg_in=0x%x status=0x%x\n",
siop_cmd->siop_tables.msg_in[0],
letoh32(siop_cmd->siop_tables.status));
else
printf("%s: current DSA invalid\n",
sc->sc_dev.dv_xname);
need_reset = 1;
}
}
if (istat & ISTAT_SIP) {
if (istat & ISTAT_DIP)
delay(10);
/*
* Can't read sist0 & sist1 independantly, or we have to
* insert delay
*/
sist = bus_space_read_2(sc->sc_rt, sc->sc_rh, SIOP_SIST0);
sstat1 = bus_space_read_1(sc->sc_rt, sc->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,
bus_space_read_1(sc->sc_rt, sc->sc_rh, SIOP_SSTAT1),
bus_space_read_4(sc->sc_rt, sc->sc_rh, SIOP_DSA),
bus_space_read_4(sc->sc_rt, sc->sc_rh, SIOP_DSP));
#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_dev.dv_xname);
printf("scsi gross error\n");
goto reset;
}
if ((sist & SIST0_MA) && need_reset == 0) {
if (siop_cmd) {
int scratcha0;
dstat = bus_space_read_1(sc->sc_rt, sc->sc_rh,
SIOP_DSTAT);
/*
* first restore DSA, in case we were in a S/G
* operation.
*/
bus_space_write_4(sc->sc_rt, sc->sc_rh,
SIOP_DSA, siop_cmd->dsa);
scratcha0 = bus_space_read_1(sc->sc_rt,
sc->sc_rh, SIOP_SCRATCHA);
switch (sstat1 & SSTAT1_PHASE_MASK) {
case SSTAT1_PHASE_STATUS:
/*
* Previous phase may have aborted for any reason
* (for example, the target has less data to
* transfer than requested). Just go to status
* and the command should terminate.
*/
INCSTAT(siop_stat_intr_shortxfer);
if ((dstat & DSTAT_DFE) == 0)
siop_clearfifo(sc);
/* no table to flush here */
CALL_SCRIPT(Ent_status);
return 1;
case SSTAT1_PHASE_MSGIN:
/*
* Target may be ready to disconnect.
* Save data pointers just in case.
*/
INCSTAT(siop_stat_intr_xferdisc);
if (scratcha0 & A_flag_data)
siop_sdp(siop_cmd);
else if ((dstat & DSTAT_DFE) == 0)
siop_clearfifo(sc);
bus_space_write_1(sc->sc_rt, sc->sc_rh,
SIOP_SCRATCHA,
scratcha0 & ~A_flag_data);
siop_table_sync(siop_cmd,
BUS_DMASYNC_PREREAD |
BUS_DMASYNC_PREWRITE);
CALL_SCRIPT(Ent_msgin);
return 1;
}
printf("%s: unexpected phase mismatch %d\n",
sc->sc_dev.dv_xname,
sstat1 & SSTAT1_PHASE_MASK);
} else {
printf("%s: phase mismatch without command\n",
sc->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_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->status = CMDST_DONE;
xs->error = XS_SELTIMEOUT;
freetarget = 1;
goto end;
} else {
printf("%s: selection timeout without "
"command\n", sc->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->siop_tables.status =
htole32(SCSI_CHECK);
goto end;
}
printf("%s: unexpected disconnect without "
"command\n", sc->sc_dev.dv_xname);
goto reset;
}
if (sist & (SIST1_SBMC << 8)) {
/* SCSI bus mode change */
if (siop_modechange(sc) == 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 the script ourself, at the
* interrupted instruction.
*/
bus_space_write_4(sc->sc_rt, sc->sc_rh, SIOP_DSP,
bus_space_read_4(sc->sc_rt, sc->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_dev.dv_xname, sist,
bus_space_read_1(sc->sc_rt, sc->sc_rh, SIOP_SSTAT1),
bus_space_read_4(sc->sc_rt, sc->sc_rh, SIOP_DSA),
bus_space_read_4(sc->sc_rt, sc->sc_rh, SIOP_DSP));
if (siop_cmd) {
siop_cmd->status = CMDST_DONE;
xs->error = XS_SELTIMEOUT;
goto end;
}
need_reset = 1;
}
if (need_reset) {
reset:
/* fatal error, reset the bus */
siop_resetbus(sc);
/* no table to flush here */
return 1;
}
scintr:
if ((istat & ISTAT_DIP) && (dstat & DSTAT_SIR)) { /* script interrupt */
irqcode = bus_space_read_4(sc->sc_rt, sc->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_dev.dv_xname,
irqcode);
goto reset;
}
if (siop_cmd->status != CMDST_ACTIVE &&
siop_cmd->status != CMDST_SENSE_ACTIVE) {
printf("%s: command with invalid status "
"(IRQ code 0x%x current status %d) !\n",
sc->sc_dev.dv_xname,
irqcode, siop_cmd->status);
xs = NULL;
}
}
switch(irqcode) {
case A_int_err:
printf("error, DSP=0x%x\n",
(int)(bus_space_read_4(sc->sc_rt, sc->sc_rh,
SIOP_DSP) - sc->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_dev.dv_xname);
goto reset;
case A_int_resellun:
INCSTAT(siop_stat_intr_lunresel);
target = bus_space_read_1(sc->sc_rt, sc->sc_rh,
SIOP_SCRATCHA) & 0xf;
lun = bus_space_read_1(sc->sc_rt, sc->sc_rh,
SIOP_SCRATCHA + 1);
tag = bus_space_read_1(sc->sc_rt, sc->sc_rh,
SIOP_SCRATCHA + 2);
siop_target = sc->targets[target];
if (siop_target == NULL) {
printf("%s: reselect with invalid "
"target %d\n", sc->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_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_dev.dv_xname,
target, lun, tag);
goto reset;
}
siop_cmd = siop_lun->siop_tag[tag].active;
bus_space_write_4(sc->sc_rt, sc->sc_rh, SIOP_DSP,
siop_cmd->dsa + sizeof(struct siop_xfer_common) +
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_dev.dv_xname);
goto reset;
case A_int_msgin:
{
int msgin = bus_space_read_1(sc->sc_rt, sc->sc_rh,
SIOP_SFBR);
if (msgin == MSG_MESSAGE_REJECT) {
int msg, extmsg;
if (siop_cmd->siop_tables.msg_out[0] & 0x80) {
/*
* Message was part of an identify +
* something else. Identify shouldn't
* have been rejected.
*/
msg = siop_cmd->siop_tables.msg_out[1];
extmsg =
siop_cmd->siop_tables.msg_out[3];
} else {
msg = siop_cmd->siop_tables.msg_out[0];
extmsg =
siop_cmd->siop_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_dev.dv_xname);
printf("our reject message was "
"rejected\n");
goto reset;
}
if (msg == MSG_EXTENDED &&
extmsg == MSG_EXT_WDTR) {
if ((siop_target->flags & TARF_SYNC)
== 0) {
siop_target->status = TARST_OK;
siop_print_info(sc, target);
/* no table to flush here */
CALL_SCRIPT(Ent_msgin_ack);
return 1;
}
siop_target->status = TARST_SYNC_NEG;
siop_sdtr_msg(siop_cmd, 0,
sc->min_st_sync, sc->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) {
siop_target->status = TARST_OK;
siop_print_info(sc, target);
/* no table to flush here */
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_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 (xs)
sc_print_addr(xs->sc_link);
else
printf("%s: ", sc->sc_dev.dv_xname);
printf("unhandled message 0x%x\n",
siop_cmd->siop_tables.msg_in[0]);
siop_cmd->siop_tables.msg_out[0] = MSG_MESSAGE_REJECT;
siop_cmd->siop_tables.t_msgout.count= htole32(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->siop_tables.msg_in[2],
siop_cmd->siop_tables.msg_in[1]);
#endif
if (siop_cmd->siop_tables.msg_in[1] > 6)
printf("%s: extended message too big (%d)\n",
sc->sc_dev.dv_xname,
siop_cmd->siop_tables.msg_in[1]);
siop_cmd->siop_tables.t_extmsgdata.count =
htole32(siop_cmd->siop_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:
{
int neg_action = SIOP_NEG_NOP;
const char *neg_name = "";
#ifdef SIOP_DEBUG_INTR
{
int i;
printf("extended message: 0x%x, data:",
siop_cmd->siop_tables.msg_in[2]);
for (i = 3; i < 2 + siop_cmd->siop_tables.msg_in[1];
i++)
printf(" 0x%x",
siop_cmd->siop_tables.msg_in[i]);
printf("\n");
}
#endif
switch (siop_cmd->siop_tables.msg_in[2]) {
case MSG_EXT_WDTR:
neg_action = siop_wdtr_neg(siop_cmd);
neg_name = "wdtr";
break;
case MSG_EXT_SDTR:
neg_action = siop_sdtr_neg(siop_cmd);
neg_name = "sdtr";
break;
case MSG_EXT_PPR:
neg_action = siop_ppr_neg(siop_cmd);
neg_name = "ppr";
break;
default:
neg_action = SIOP_NEG_MSGREJ;
break;
}
switch (neg_action) {
case SIOP_NEG_NOP:
break;
case SIOP_NEG_MSGOUT:
siop_update_scntl3(sc, siop_cmd->siop_target);
siop_table_sync(siop_cmd,
BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
CALL_SCRIPT(Ent_send_msgout);
break;
case SIOP_NEG_ACK:
siop_update_scntl3(sc, siop_cmd->siop_target);
siop_table_sync(siop_cmd,
BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
CALL_SCRIPT(Ent_msgin_ack);
break;
case SIOP_NEG_MSGREJ:
siop_cmd->siop_tables.msg_out[0] = MSG_MESSAGE_REJECT;
siop_cmd->siop_tables.t_msgout.count = htole32(1);
siop_table_sync(siop_cmd,
BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
CALL_SCRIPT(Ent_send_msgout);
break;
default:
panic("invalid return value from siop_%s_neg(): 0x%x", neg_name, neg_action);
}
return (1);
}
case A_int_disc:
INCSTAT(siop_stat_intr_sdp);
offset = bus_space_read_1(sc->sc_rt, sc->sc_rh,
SIOP_SCRATCHA + 1);
#ifdef SIOP_DEBUG_DR
printf("disconnect offset %d\n", offset);
#endif
if (offset > SIOP_NSG) {
printf("%s: bad offset for disconnect (%d)\n",
sc->sc_dev.dv_xname, offset);
goto reset;
}
/*
* offset == SIOP_NSG may be a valid condition if
* we get a sdp when the xfer is done.
* Don't call memmove in this case.
*/
if (offset < SIOP_NSG) {
bcopy(&siop_cmd->siop_tables.data[offset],
&siop_cmd->siop_tables.data[0],
(SIOP_NSG - offset) * sizeof(struct scr_table));
siop_table_sync(siop_cmd,
BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
}
CALL_SCRIPT(Ent_script_sched);
/* check if we can put some command in scheduler */
siop_start(sc);
return 1;
case A_int_resfail:
printf("reselect failed\n");
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_dev.dv_xname, (u_long)siop_cmd->dsa);
siop_cmd->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->dsa,
letoh32(siop_cmd->siop_tables.id),
siop_cmd->siop_tables.msg_in[0],
letoh32(siop_cmd->siop_tables.status));
#endif
INCSTAT(siop_stat_intr_done);
if (siop_cmd->status == CMDST_SENSE_ACTIVE)
siop_cmd->status = CMDST_SENSE_DONE;
else
siop_cmd->status = CMDST_DONE;
goto end;
default:
printf("unknown irqcode %x\n", irqcode);
if (xs) {
xs->error = XS_SELTIMEOUT;
goto end;
}
goto reset;
}
return 1;
}
/* 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_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(), it may need to put
* a cmd at the front of the queue.
*/
if (letoh32(siop_cmd->siop_tables.status) == SCSI_OK &&
TAILQ_FIRST(&sc->urgent_list) != NULL)
CALL_SCRIPT(Ent_script_sched);
else
restart = 1;
siop_scsicmd_end(siop_cmd);
siop_lun->siop_tag[tag].active = NULL;
if (siop_cmd->status == CMDST_FREE) {
TAILQ_INSERT_TAIL(&sc->free_list, siop_cmd, next);
siop_lun->lun_flags &= ~SIOP_LUNF_FULL;
if (freetarget && siop_target->status == TARST_PROBING)
siop_del_dev(sc, target, lun);
}
siop_start(sc);
if (restart)
CALL_SCRIPT(Ent_script_sched);
return 1;
}
void
siop_scsicmd_end(siop_cmd)
struct siop_cmd *siop_cmd;
{
struct scsi_xfer *xs = siop_cmd->xs;
struct siop_softc *sc = siop_cmd->siop_sc;
switch(letoh32(siop_cmd->siop_tables.status)) {
case SCSI_OK:
xs->error = (siop_cmd->status == CMDST_DONE) ?
XS_NOERROR : XS_SENSE;
break;
case SCSI_BUSY:
xs->error = XS_BUSY;
break;
case SCSI_CHECK:
if (siop_cmd->status == CMDST_SENSE_DONE) {
/* request sense on a request sense ? */
printf("request sense failed\n");
xs->error = XS_DRIVER_STUFFUP;
} else {
siop_cmd->status = CMDST_SENSE;
}
break;
case SCSI_QUEUE_FULL:
{
struct siop_lun *siop_lun = siop_cmd->siop_target->siop_lun[
xs->sc_link->lun];
/*
* 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_dev.dv_xname,
xs->sc_link->target,
xs->sc_link->lun, siop_cmd->tag);
#endif
#ifndef PMON
timeout_del(&xs->stimeout);
#endif
siop_lun->lun_flags |= SIOP_LUNF_FULL;
siop_cmd->status = CMDST_READY;
siop_setuptables(siop_cmd);
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->status != CMDST_SENSE_DONE &&
xs->flags & (SCSI_DATA_IN | SCSI_DATA_OUT)) {
bus_dmamap_sync(sc->sc_dmat, siop_cmd->dmamap_data,
0, siop_cmd->dmamap_data->dm_mapsize,
(xs->flags & SCSI_DATA_IN) ?
BUS_DMASYNC_POSTREAD : BUS_DMASYNC_POSTWRITE);
bus_dmamap_unload(sc->sc_dmat, siop_cmd->dmamap_data);
}
bus_dmamap_unload(sc->sc_dmat, siop_cmd->dmamap_cmd);
if (siop_cmd->status == CMDST_SENSE) {
/* issue a request sense for this target */
int error;
siop_cmd->rs_cmd.opcode = REQUEST_SENSE;
siop_cmd->rs_cmd.byte2 = xs->sc_link->lun << 5;
siop_cmd->rs_cmd.unused[0] = siop_cmd->rs_cmd.unused[1] = 0;
siop_cmd->rs_cmd.length = sizeof(struct scsi_sense_data);
siop_cmd->rs_cmd.control = 0;
siop_cmd->flags &= ~CMDFL_TAG;
error = bus_dmamap_load(sc->sc_dmat, siop_cmd->dmamap_cmd,
&siop_cmd->rs_cmd, sizeof(struct scsi_sense),
NULL, BUS_DMA_NOWAIT);
if (error) {
printf("%s: unable to load cmd DMA map "
"(for SENSE): %d\n",
sc->sc_dev.dv_xname, error);
xs->error = XS_DRIVER_STUFFUP;
goto out;
}
error = bus_dmamap_load(sc->sc_dmat, siop_cmd->dmamap_data,
&xs->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_dev.dv_xname, error);
xs->error = XS_DRIVER_STUFFUP;
bus_dmamap_unload(sc->sc_dmat, siop_cmd->dmamap_cmd);
goto out;
}
bus_dmamap_sync(sc->sc_dmat, siop_cmd->dmamap_data,
0, siop_cmd->dmamap_data->dm_mapsize,
BUS_DMASYNC_PREREAD);
bus_dmamap_sync(sc->sc_dmat, siop_cmd->dmamap_cmd,
0, siop_cmd->dmamap_cmd->dm_mapsize,
BUS_DMASYNC_PREWRITE);
siop_setuptables(siop_cmd);
/* arrange for the cmd to be handled now */
TAILQ_INSERT_HEAD(&sc->urgent_list, siop_cmd, next);
return;
} else if (siop_cmd->status == CMDST_SENSE_DONE) {
bus_dmamap_sync(sc->sc_dmat, siop_cmd->dmamap_data,
0, siop_cmd->dmamap_data->dm_mapsize,
BUS_DMASYNC_POSTREAD);
bus_dmamap_unload(sc->sc_dmat, siop_cmd->dmamap_data);
}
out:
#ifndef PMON
timeout_del(&siop_cmd->xs->stimeout);
#endif
siop_cmd->status = CMDST_FREE;
xs->flags |= ITSDONE;
xs->resid = 0;
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(siop_cmd)
struct siop_cmd *siop_cmd;
{
struct siop_softc *sc = siop_cmd->siop_sc;
int target = siop_cmd->xs->sc_link->target;
int lun = siop_cmd->xs->sc_link->lun;
int tag = siop_cmd->siop_tables.msg_out[2];
struct siop_lun *siop_lun = sc->targets[target]->siop_lun[lun];
#ifdef SIOP_DEBUG
printf("%s:%d:%d: tag message %d (%d) rejected (status %d)\n",
sc->sc_dev.dv_xname, target, lun, tag, siop_cmd->tag,
siop_cmd->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_dev.dv_xname, target, lun,
siop_lun->siop_tag[0].active->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->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->dsa + sizeof(struct siop_xfer_common) +
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 structs and report losage 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(sc)
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;
/*
* 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_dev.dv_xname);
/* stop, reset and restart the chip */
siop_reset(sc);
TAILQ_INIT(&reset_list);
/*
* Process all commands: first commmands being executed
*/
for (target = 0; target < sc->sc_link.adapter_buswidth;
target++) {
if (sc->targets[target] == NULL)
continue;
for (lun = 0; lun < 8; lun++) {
siop_lun = sc->targets[target]->siop_lun[lun];
if (siop_lun == NULL)
continue;
siop_lun->lun_flags &= ~SIOP_LUNF_FULL;
for (tag = 0; tag <
((sc->targets[target]->flags & TARF_TAG) ?
SIOP_NTAG : 1);
tag++) {
siop_cmd = siop_lun->siop_tag[tag].active;
if (siop_cmd == NULL)
continue;
printf("cmd %p (target %d:%d) in reset list\n",
siop_cmd, target, lun);
TAILQ_INSERT_TAIL(&reset_list, siop_cmd, next);
siop_lun->siop_tag[tag].active = NULL;
}
}
sc->targets[target]->status = TARST_ASYNC;
sc->targets[target]->flags = 0;
}
/* 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);
siop_cmd->flags &= ~CMDFL_TAG;
printf("cmd %p (target %d:%d) in reset list (wait)\n",
siop_cmd, siop_cmd->xs->sc_link->target,
siop_cmd->xs->sc_link->lun);
TAILQ_REMOVE(&sc->urgent_list, siop_cmd, next);
TAILQ_INSERT_TAIL(&reset_list, siop_cmd, next);
}
/* Then command 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);
siop_cmd->flags &= ~CMDFL_TAG;
printf("cmd %p (target %d:%d) in reset list (wait)\n",
siop_cmd, siop_cmd->xs->sc_link->target,
siop_cmd->xs->sc_link->lun);
TAILQ_REMOVE(&sc->ready_list, siop_cmd, next);
TAILQ_INSERT_TAIL(&reset_list, siop_cmd, next);
}
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->xs->error = (siop_cmd->flags & CMDFL_TIMEOUT) ?
XS_TIMEOUT : XS_RESET;
siop_cmd->siop_tables.status = htole32(SCSI_SIOP_NOCHECK);
printf("cmd %p (status %d) about to be processed\n", siop_cmd,
siop_cmd->status);
if (siop_cmd->status == CMDST_SENSE ||
siop_cmd->status == CMDST_SENSE_ACTIVE)
siop_cmd->status = CMDST_SENSE_DONE;
else
siop_cmd->status = CMDST_DONE;
TAILQ_REMOVE(&reset_list, siop_cmd, next);
siop_scsicmd_end(siop_cmd);
TAILQ_INSERT_TAIL(&sc->free_list, siop_cmd, next);
}
}
int
siop_scsicmd(xs)
struct scsi_xfer *xs;
{
struct siop_softc *sc = (struct siop_softc *)xs->sc_link->adapter_softc;
struct siop_cmd *siop_cmd;
int s, error, i, j;
const int target = xs->sc_link->target;
const int lun = xs->sc_link->lun;
s = splbio();
#ifdef SIOP_DEBUG_SCHED
printf("starting cmd 0x%02x for %d:%d\n", xs->cmd->opcode, target, lun);
#endif
siop_cmd = TAILQ_FIRST(&sc->free_list);
if (siop_cmd != NULL) {
TAILQ_REMOVE(&sc->free_list, siop_cmd, next);
} else {
xs->error = XS_DRIVER_STUFFUP;
splx(s);
return(TRY_AGAIN_LATER);
}
#ifndef PMON
/* Always reset xs->stimeout, lest we timeout_del() with trash */
timeout_set(&xs->stimeout, siop_timeout, siop_cmd);
#endif
#ifdef DIAGNOSTIC
if (siop_cmd->status != CMDST_FREE)
panic("siop_scsicmd: new cmd not free");
#endif
if (sc->targets[target] == NULL) {
#ifdef SIOP_DEBUG
printf("%s: alloc siop_target for target %d\n",
sc->sc_dev.dv_xname, target);
#endif
sc->targets[target] =
malloc(sizeof(struct siop_target), M_DEVBUF, M_NOWAIT);
if (sc->targets[target] == NULL) {
printf("%s: can't malloc memory for target %d\n",
sc->sc_dev.dv_xname, target);
xs->error = XS_DRIVER_STUFFUP;
splx(s);
return(TRY_AGAIN_LATER);
}
sc->targets[target]->status = TARST_PROBING;
sc->targets[target]->flags = 0;
sc->targets[target]->id = sc->clock_div << 24; /* scntl3 */
sc->targets[target]->id |= target << 16; /* id */
/* sc->targets[target]->id |= 0x0 << 8; scxfer is 0 */
/* get a lun switch script */
sc->targets[target]->lunsw = siop_get_lunsw(sc);
if (sc->targets[target]->lunsw == NULL) {
printf("%s: can't alloc lunsw for target %d\n",
sc->sc_dev.dv_xname, target);
xs->error = XS_DRIVER_STUFFUP;
splx(s);
return(TRY_AGAIN_LATER);
}
for (i=0; i < 8; i++)
sc->targets[target]->siop_lun[i] = NULL;
siop_add_reselsw(sc, target);
}
if (sc->targets[target]->siop_lun[lun] == NULL) {
sc->targets[target]->siop_lun[lun] =
malloc(sizeof(struct siop_lun), M_DEVBUF, M_NOWAIT);
if (sc->targets[target]->siop_lun[lun] == NULL) {
printf("%s: can't alloc siop_lun for target %d "
"lun %d\n", sc->sc_dev.dv_xname, target, lun);
xs->error = XS_DRIVER_STUFFUP;
splx(s);
return(TRY_AGAIN_LATER);
}
memset(sc->targets[target]->siop_lun[lun], 0,
sizeof(struct siop_lun));
}
siop_cmd->siop_target = sc->targets[target];
siop_cmd->xs = xs;
siop_cmd->flags = 0;
siop_cmd->status = CMDST_READY;
/* load the DMA maps */
error = bus_dmamap_load(sc->sc_dmat, siop_cmd->dmamap_cmd,
xs->cmd, xs->cmdlen, NULL, BUS_DMA_NOWAIT);
if (error) {
printf("%s: unable to load cmd DMA map: %d\n",
sc->sc_dev.dv_xname, error);
xs->error = XS_DRIVER_STUFFUP;
splx(s);
return(TRY_AGAIN_LATER);
}
if (xs->flags & (SCSI_DATA_IN | SCSI_DATA_OUT)) {
error = bus_dmamap_load(sc->sc_dmat, siop_cmd->dmamap_data,
xs->data, xs->datalen, NULL, BUS_DMA_NOWAIT);
if (error) {
printf("%s: unable to load cmd DMA map: %d\n",
sc->sc_dev.dv_xname, error);
xs->error = XS_DRIVER_STUFFUP;
bus_dmamap_unload(sc->sc_dmat, siop_cmd->dmamap_cmd);
splx(s);
return(TRY_AGAIN_LATER);
}
bus_dmamap_sync(sc->sc_dmat, siop_cmd->dmamap_data,
0, siop_cmd->dmamap_data->dm_mapsize,
(xs->flags & SCSI_DATA_IN) ?
BUS_DMASYNC_PREREAD : BUS_DMASYNC_PREWRITE);
}
bus_dmamap_sync(sc->sc_dmat, siop_cmd->dmamap_cmd,
0, siop_cmd->dmamap_cmd->dm_mapsize,
BUS_DMASYNC_PREWRITE);
siop_setuptables(siop_cmd);
TAILQ_INSERT_TAIL(&sc->ready_list, siop_cmd, next);
siop_start(sc);
if (xs->flags & SCSI_POLL) {
/* poll for command completion */
for(i = xs->timeout; i > 0; i--) {
siop_intr(sc);
if (xs->flags & ITSDONE) {
if ((xs->cmd->opcode == INQUIRY)
&& (xs->error == XS_NOERROR)) {
error = ((struct scsi_inquiry_data *)xs->data)->device & SID_QUAL;
if (error != SID_QUAL_BAD_LU) {
/*
* Allocate enough commands to hold at least max openings
* worth of commands. Do this statically now 'cuz
* a) We can't rely on the upper layers to ask for more
* b) 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);
if (sc->targets[target]->status == TARST_PROBING)
sc->targets[target]->status = TARST_ASYNC;
/* Can't do lun 0 here, because flags not set yet */
if (lun > 0)
siop_add_dev(sc, target, lun);
}
}
break;
}
delay(1000);
}
splx(s);
if (i == 0) {
siop_timeout(siop_cmd);
while ((xs->flags & ITSDONE) == 0)
siop_intr(sc);
}
return (COMPLETE);
}
splx(s);
return (SUCCESSFULLY_QUEUED);
}
void
siop_start(sc)
struct siop_softc *sc;
{
struct siop_cmd *siop_cmd, *next_siop_cmd;
struct siop_lun *siop_lun;
u_int32_t dsa;
#ifndef PMON
int timeout;
#endif
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 slots 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->status != CMDST_READY &&
siop_cmd->status != CMDST_SENSE)
panic("siop: non-ready cmd in ready list");
#endif
target = siop_cmd->xs->sc_link->target;
lun = siop_cmd->xs->sc_link->lun;
siop_lun = sc->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->status == CMDST_READY)
continue;
/* find a free tag if needed */
if (siop_cmd->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->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->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->dsa);
#endif
/* Ok, we can add the tag message */
if (tag > 0) {
#ifdef DIAGNOSTIC
int msgcount =
letoh32(siop_cmd->siop_tables.t_msgout.count);
if (msgcount != 1)
printf("%s:%d:%d: tag %d with msgcount %d\n",
sc->sc_dev.dv_xname, target, lun, tag,
msgcount);
#endif
if (siop_cmd->xs->bp != NULL &&
(siop_cmd->xs->bp->b_flags & B_ASYNC))
siop_cmd->siop_tables.msg_out[1] =
MSG_SIMPLE_Q_TAG;
else
siop_cmd->siop_tables.msg_out[1] =
MSG_ORDERED_Q_TAG;
siop_cmd->siop_tables.msg_out[2] = tag;
siop_cmd->siop_tables.t_msgout.count = htole32(3);
}
/* note that we started a new command */
newcmd = 1;
/* mark command as active */
if (siop_cmd->status == CMDST_READY) {
siop_cmd->status = CMDST_ACTIVE;
} else if (siop_cmd->status == CMDST_SENSE) {
siop_cmd->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->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_xfer_common) +
Ent_ldsa_reload_dsa);
/* CMD script: MOVE MEMORY addr */
siop_cmd->siop_xfer->resel[E_ldsa_abs_slot_Used[0]] =
htole32(sc->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_xfer_common) + Ent_ldsa_select);
#ifndef PMON
/* handle timeout */
if (siop_cmd->status == CMDST_ACTIVE) {
if ((siop_cmd->xs->flags & SCSI_POLL) == 0) {
/* start expire timer */
timeout = (u_int64_t) siop_cmd->xs->timeout *
(u_int64_t)hz / 1000;
if (timeout == 0)
timeout = 1;
timeout_add(&siop_cmd->xs->stimeout, timeout);
}
}
#endif
/*
* 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_rt, sc->sc_rh, SIOP_ISTAT, ISTAT_SIGP);
/* and wait for IRQ */
return;
}
void
siop_timeout(v)
void *v;
{
struct siop_cmd *siop_cmd = v;
struct siop_softc *sc = siop_cmd->siop_sc;
int s;
sc_print_addr(siop_cmd->xs->sc_link);
printf("timeout on SCSI command 0x%x\n", siop_cmd->xs->cmd->opcode);
s = splbio();
/* reset the scsi bus */
siop_resetbus(sc);
#ifndef PMON
/* deactivate callout */
timeout_del(&siop_cmd->xs->stimeout);
#endif
/*
* Mark command as being timed out and just return. The bus
* reset will generate an interrupt, which will be handled
* in siop_intr().
*/
siop_cmd->flags |= CMDFL_TIMEOUT;
splx(s);
return;
}
void
siop_dump_script(sc)
struct siop_softc *sc;
{
int i;
printf("Dumping script @ 0x%08x:\n", sc->sc_script);
for (i = 0; i < PAGE_SIZE / 4; i += 2) {
printf("0x%04x: 0x%08x 0x%08x", i * 4,
siop_script_read(sc, i), siop_script_read(sc, i+1));
if ((siop_script_read(sc, i) & 0xe0000000) == 0xc0000000) {
i++;
printf(" 0x%08x", siop_script_read(sc, i+1));
}
printf("\n");
}
}
int
siop_morecbd(sc)
struct siop_softc *sc;
{
int error, i, j;
bus_dma_segment_t seg;
int rseg;
struct siop_cbd *newcbd;
bus_addr_t dsa;
u_int32_t *scr;
/* allocate a new list head */
newcbd = malloc(sizeof(struct siop_cbd), M_DEVBUF, M_NOWAIT);
if (newcbd == NULL) {
printf("%s: can't allocate memory for command descriptors "
"head\n", sc->sc_dev.dv_xname);
return ENOMEM;
}
memset(newcbd, 0, sizeof(struct siop_cbd));
/* allocate cmd list */
newcbd->cmds =
malloc(sizeof(struct siop_cmd) * SIOP_NCMDPB, M_DEVBUF, M_NOWAIT);
if (newcbd->cmds == NULL) {
printf("%s: can't allocate memory for command descriptors\n",
sc->sc_dev.dv_xname);
error = ENOMEM;
goto bad3;
}
memset(newcbd->cmds, 0, sizeof(struct siop_cmd) * SIOP_NCMDPB);
error = bus_dmamem_alloc(sc->sc_dmat, PAGE_SIZE, PAGE_SIZE, 0, &seg,
1, &rseg, BUS_DMA_NOWAIT);
if (error) {
printf("%s: unable to allocate cbd DMA memory, error = %d\n",
sc->sc_dev.dv_xname, error);
goto bad2;
}
error = bus_dmamem_map(sc->sc_dmat, &seg, rseg, PAGE_SIZE,
(caddr_t *)&newcbd->xfers, BUS_DMA_NOWAIT|BUS_DMA_COHERENT);
if (error) {
printf("%s: unable to map cbd DMA memory, error = %d\n",
sc->sc_dev.dv_xname, error);
goto bad2;
}
error = bus_dmamap_create(sc->sc_dmat, PAGE_SIZE, 1, PAGE_SIZE, 0,
BUS_DMA_NOWAIT, &newcbd->xferdma);
if (error) {
printf("%s: unable to create cbd DMA map, error = %d\n",
sc->sc_dev.dv_xname, error);
goto bad1;
}
error = bus_dmamap_load(sc->sc_dmat, newcbd->xferdma, newcbd->xfers,
PAGE_SIZE, NULL, BUS_DMA_NOWAIT);
if (error) {
printf("%s: unable to load cbd DMA map, error = %d\n",
sc->sc_dev.dv_xname, error);
goto bad0;
}
#ifdef DEBUG
printf("%s: alloc newcdb at PHY addr 0x%lx\n", sc->sc_dev.dv_xname,
(unsigned long)newcbd->xferdma->dm_segs[0].ds_addr);
printf("%s: SIOP_NCMDPB is %d\n", sc->sc_dev.dv_xname, SIOP_NCMDPB);
#endif
for (i = 0; i < SIOP_NCMDPB; i++) {
error = bus_dmamap_create(sc->sc_dmat, MAXPHYS, SIOP_NSG,
MAXPHYS, 0, BUS_DMA_NOWAIT | BUS_DMA_ALLOCNOW,
&newcbd->cmds[i].dmamap_data);
if (error) {
printf("%s: unable to create data DMA map for cbd: "
"error %d\n",
sc->sc_dev.dv_xname, error);
goto bad0;
}
error = bus_dmamap_create(sc->sc_dmat,
sizeof(struct scsi_generic), 1,
sizeof(struct scsi_generic), 0,
BUS_DMA_NOWAIT | BUS_DMA_ALLOCNOW,
&newcbd->cmds[i].dmamap_cmd);
if (error) {
printf("%s: unable to create cmd DMA map for cbd %d\n",
sc->sc_dev.dv_xname, error);
goto bad0;
}
newcbd->cmds[i].siop_sc = sc;
newcbd->cmds[i].siop_cbdp = newcbd;
newcbd->cmds[i].siop_xfer = &newcbd->xfers[i];
memset(newcbd->cmds[i].siop_xfer, 0,
sizeof(struct siop_xfer));
newcbd->cmds[i].dsa = newcbd->xferdma->dm_segs[0].ds_addr +
i * sizeof(struct siop_xfer);
dsa = newcbd->cmds[i].dsa;
newcbd->cmds[i].status = CMDST_FREE;
newcbd->cmds[i].siop_tables.t_msgout.count= htole32(1);
newcbd->cmds[i].siop_tables.t_msgout.addr = htole32(dsa);
newcbd->cmds[i].siop_tables.t_msgin.count= htole32(1);
newcbd->cmds[i].siop_tables.t_msgin.addr = htole32(dsa + 16);
newcbd->cmds[i].siop_tables.t_extmsgin.count= htole32(2);
newcbd->cmds[i].siop_tables.t_extmsgin.addr = htole32(dsa + 17);
newcbd->cmds[i].siop_tables.t_extmsgdata.addr =
htole32(dsa + 19);
newcbd->cmds[i].siop_tables.t_status.count= htole32(1);
newcbd->cmds[i].siop_tables.t_status.addr = htole32(dsa + 32);
/* The select/reselect script */
scr = &newcbd->cmds[i].siop_xfer->resel[0];
for (j = 0; j < sizeof(load_dsa) / sizeof(load_dsa[0]); j++)
scr[j] = htole32(load_dsa[j]);
/*
* 0x78000000 is a 'move data8 to reg'. data8 is the second
* octet, reg offset is the third.
*/
scr[Ent_rdsa0 / 4] =
htole32(0x78100000 | ((dsa & 0x000000ff) << 8));
scr[Ent_rdsa1 / 4] =
htole32(0x78110000 | ( dsa & 0x0000ff00 ));
scr[Ent_rdsa2 / 4] =
htole32(0x78120000 | ((dsa & 0x00ff0000) >> 8));
scr[Ent_rdsa3 / 4] =
htole32(0x78130000 | ((dsa & 0xff000000) >> 16));
scr[E_ldsa_abs_reselected_Used[0]] =
htole32(sc->sc_scriptaddr + Ent_reselected);
scr[E_ldsa_abs_reselect_Used[0]] =
htole32(sc->sc_scriptaddr + Ent_reselect);
scr[E_ldsa_abs_selected_Used[0]] =
htole32(sc->sc_scriptaddr + Ent_selected);
scr[E_ldsa_abs_data_Used[0]] =
htole32(dsa + sizeof(struct siop_xfer_common) +
Ent_ldsa_data);
/* JUMP foo, IF FALSE - used by MOVE MEMORY to clear the slot */
scr[Ent_ldsa_data / 4] = htole32(0x80000000);
TAILQ_INSERT_TAIL(&sc->free_list, &newcbd->cmds[i], next);
#ifdef SIOP_DEBUG
printf("tables[%d]: in=0x%x out=0x%x status=0x%x\n", i,
letoh32(newcbd->cmds[i].siop_tables.t_msgin.addr),
letoh32(newcbd->cmds[i].siop_tables.t_msgout.addr),
letoh32(newcbd->cmds[i].siop_tables.t_status.addr));
#endif
}
TAILQ_INSERT_TAIL(&sc->cmds, newcbd, next);
return 0;
bad0:
bus_dmamap_destroy(sc->sc_dmat, newcbd->xferdma);
bad1:
bus_dmamem_free(sc->sc_dmat, &seg, rseg);
bad2:
free(newcbd->cmds, M_DEVBUF);
bad3:
free(newcbd, M_DEVBUF);
return error;
}
struct siop_lunsw *
siop_get_lunsw(sc)
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);
if (lunsw == NULL)
return NULL;
memset(lunsw, 0, sizeof(struct siop_lunsw));
#ifdef SIOP_DEBUG
printf("allocating lunsw at offset %d\n", sc->script_free_lo);
#endif
if (sc->features & SF_CHIP_RAM) {
bus_space_write_region_4(sc->sc_ramt, sc->sc_ramh,
sc->script_free_lo * 4, lun_switch,
sizeof(lun_switch) / sizeof(lun_switch[0]));
bus_space_write_4(sc->sc_ramt, sc->sc_ramh,
(sc->script_free_lo + E_abs_lunsw_return_Used[0]) * 4,
sc->sc_scriptaddr + Ent_lunsw_return);
} else {
for (i = 0; i < sizeof(lun_switch) / sizeof(lun_switch[0]);
i++)
sc->sc_script[sc->script_free_lo + i] =
htole32(lun_switch[i]);
sc->sc_script[sc->script_free_lo + E_abs_lunsw_return_Used[0]] =
htole32(sc->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;
if (sc->script_free_lo > 1024)
printf("%s: script_free_lo (%d) > 1024\n", sc->sc_dev.dv_xname,
sc->script_free_lo);
siop_script_sync(sc, BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
return lunsw;
}
void
siop_add_reselsw(sc, target)
struct siop_softc *sc;
int target;
{
int i;
struct siop_lun *siop_lun;
/*
* add an entry to resel switch
*/
siop_script_sync(sc, BUS_DMASYNC_POSTWRITE);
for (i = 0; i < 15; i++) {
sc->targets[target]->reseloff = Ent_resel_targ0 / 4 + i * 2;
if ((siop_script_read(sc, sc->targets[target]->reseloff) & 0xff)
== 0xff) { /* it's free */
#ifdef SIOP_DEBUG
printf("siop: target %d slot %d offset %d\n",
target, i, sc->targets[target]->reseloff);
#endif
/* JUMP abs_foo, IF target | 0x80; */
siop_script_write(sc, sc->targets[target]->reseloff,
0x800c0080 | target);
siop_script_write(sc, sc->targets[target]->reseloff + 1,
sc->sc_scriptaddr +
sc->targets[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 = sc->targets[target]->siop_lun[i];
if (siop_lun == NULL)
continue;
if (siop_lun->reseloff > 0) {
siop_lun->reseloff = 0;
siop_add_dev(sc, target, i);
}
}
siop_update_scntl3(sc, sc->targets[target]);
siop_script_sync(sc, BUS_DMASYNC_PREWRITE);
}
void
siop_update_scntl3(sc, siop_target)
struct siop_softc *sc;
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->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->id & 0x0000ff00));
/* If DT, change null op ('MOVE 0xff TO SFBR') to 'MOVE n TO SCNTL4' */
if (siop_target->flags & TARF_ISDT)
siop_script_write(sc,
siop_target->lunsw->lunsw_off + (Ent_restore_scntl3 / 4) + 4,
0x78bc0000 | ((siop_target->id << 8) & 0x0000ff00));
else
siop_script_write(sc,
siop_target->lunsw->lunsw_off + (Ent_restore_scntl3 / 4) + 4,
0x7808ff00);
siop_script_sync(sc, BUS_DMASYNC_PREWRITE);
}
void
siop_add_dev(sc, target, lun)
struct siop_softc *sc;
int target;
int lun;
{
struct siop_lunsw *lunsw;
struct siop_lun *siop_lun = sc->targets[target]->siop_lun[lun];
int i, ntargets;
if (siop_lun->reseloff > 0)
return;
lunsw = sc->targets[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 DEBUG
printf("%s:%d:%d: can't allocate a lun sw slot\n",
sc->sc_dev.dv_xname, target, lun);
#endif
return;
}
/* count how many free targets we still have to probe */
ntargets = (sc->sc_link.adapter_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])) >=
((sc->targets[target]->flags & TARF_TAG) ?
sc->script_free_hi - (sizeof(tag_switch) / sizeof(tag_switch[0])) :
sc->script_free_hi)) {
/*
* Not enough space, but probably not worth dealing with it.
* We can hold 13 tagged-queuing capable devices in the 4k RAM.
*/
#ifdef DEBUG
printf("%s:%d:%d: not enough memory for a lun sw slot\n",
sc->sc_dev.dv_xname, target, lun);
#endif
return;
}
#ifdef SIOP_DEBUG
printf("%s:%d:%d: allocate lun sw entry\n",
sc->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 (sc->targets[target]->flags & TARF_TAG) {
/* we need a tag switch */
sc->script_free_hi -=
sizeof(tag_switch) / sizeof(tag_switch[0]);
if (sc->features & SF_CHIP_RAM) {
bus_space_write_region_4(sc->sc_ramt, sc->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_script[sc->script_free_hi + i] =
htole32(tag_switch[i]);
}
}
siop_script_write(sc,
siop_lun->reseloff + 1,
sc->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 =
sc->targets[target]->siop_lun[lun]->reseloff;
}
siop_script_sync(sc, BUS_DMASYNC_PREWRITE);
}
void
siop_del_dev(sc, target, lun)
struct siop_softc *sc;
int target;
int lun;
{
int i;
#ifdef SIOP_DEBUG
printf("%s:%d:%d: free lun sw entry\n",
sc->sc_dev.dv_xname, target, lun);
#endif
if (sc->targets[target] == NULL)
return;
free(sc->targets[target]->siop_lun[lun], M_DEVBUF);
sc->targets[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 (sc->targets[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_dev.dv_xname, target, lun,
sc->targets[target]->lunsw->lunsw_off);
#endif
/*
* nothing here, free the target struct and resel
* switch entry
*/
siop_script_write(sc, sc->targets[target]->reseloff, 0x800c00ff);
siop_script_sync(sc, BUS_DMASYNC_PREWRITE);
TAILQ_INSERT_TAIL(&sc->lunsw_list, sc->targets[target]->lunsw, next);
free(sc->targets[target], M_DEVBUF);
sc->targets[target] = NULL;
sc->sc_ntargets--;
}
#ifdef SIOP_STATS
void
siop_printstats()
{
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_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