File: [cvs.NetBSD.org] / src / sys / dev / ic / siop.c (download)
Revision 1.15, Mon May 15 15:16:59 2000 UTC (23 years, 11 months ago) by bouyer
Branch: MAIN
Changes since 1.14: +2 -2
lines
Don't enable debug message by default.
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/* $NetBSD: siop.c,v 1.15 2000/05/15 15:16:59 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 <vm/vm.h>
#include <vm/vm_param.h>
#include <vm/vm_kern.h>
#include <dev/microcode/siop/siop.out>
#include <dev/scsipi/scsi_all.h>
#include <dev/scsipi/scsi_message.h>
#include <dev/scsipi/scsipi_all.h>
#include <dev/scsipi/scsiconf.h>
#include <dev/ic/siopreg.h>
#include <dev/ic/siopvar.h>
#include <dev/ic/siopvar_common.h>
#undef DEBUG
#undef DEBUG_DR
#undef DEBUG_INTR
#undef DEBUG_SHED
#undef DUMP_SCRIPT
#define SIOP_STATS
#ifndef SIOP_DEFAULT_TARGET
#define SIOP_DEFAULT_TARGET 7
#endif
#define MEM_SIZE 8192
#define CMD_OFF 4096
/* initial number of cmd descriptors */
#define SIOP_NCMD 10
void siop_reset __P((struct siop_softc *));
void siop_handle_reset __P((struct siop_softc *));
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 scsipi_xfer *));
void siop_dump_script __P((struct siop_softc *));
struct scsipi_adapter siop_adapter = {
0,
siop_scsicmd,
siop_minphys,
siop_ioctl,
NULL,
};
struct scsipi_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_reselect = 0;
static int siop_stat_intr_xferdisc = 0;
void siop_printstats __P((void));
#define INCSTAT(x) x++
#else
#define INCSTAT(x)
#endif
static __inline__ void siop_table_sync __P((struct siop_cmd *, int));
static __inline__ void
siop_table_sync(siop_cmd, ops)
struct siop_cmd *siop_cmd;
int ops;
{
struct siop_softc *sc = siop_cmd->siop_target->siop_sc;
bus_addr_t offset;
offset = siop_cmd->dsa - sc->sc_scriptdma->dm_segs[0].ds_addr;
bus_dmamap_sync(sc->sc_dmat, sc->sc_scriptdma, offset,
sizeof(struct siop_xfer), ops);
}
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;
{
bus_dmamap_sync(sc->sc_dmat, sc->sc_scriptdma, 0, CMD_OFF, ops);
}
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 itself and internal
* variables and map it.
*/
error = bus_dmamem_alloc(sc->sc_dmat, MEM_SIZE,
NBPG, 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, MEM_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, MEM_SIZE, 1,
MEM_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,
MEM_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;
}
TAILQ_INIT(&sc->free_list);
/* allocate cmd list */
sc->cmds =
malloc(sizeof(struct siop_cmd) * SIOP_NCMD, M_DEVBUF, M_NOWAIT);
if (sc->cmds == NULL) {
printf("%s: can't allocate memory for command descriptors\n",
sc->sc_dev.dv_xname);
return;
}
for (i = 0; i < SIOP_NCMD; i++) {
error = bus_dmamap_create(sc->sc_dmat, MAXPHYS, SIOP_NSG,
MAXPHYS, 0, BUS_DMA_NOWAIT | BUS_DMA_ALLOCNOW,
&sc->cmds[i].dmamap_data);
if (error) {
printf("%s: unable to create data DMA map for cbd %d\n",
sc->sc_dev.dv_xname, error);
return;
}
error = bus_dmamap_create(sc->sc_dmat,
sizeof(struct scsipi_generic), 1,
sizeof(struct scsipi_generic), 0,
BUS_DMA_NOWAIT | BUS_DMA_ALLOCNOW,
&sc->cmds[i].dmamap_cmd);
if (error) {
printf("%s: unable to create cmd DMA map for cbd %d\n",
sc->sc_dev.dv_xname, error);
return;
}
sc->cmds[i].siop_table =
&((struct siop_xfer *)(&sc->sc_script[CMD_OFF/4]))[i];
memset(sc->cmds[i].siop_table, 0, sizeof(struct siop_xfer));
sc->cmds[i].dsa = sc->sc_scriptdma->dm_segs[0].ds_addr +
CMD_OFF + i * sizeof(struct siop_xfer);
sc->cmds[i].status = CMDST_FREE;
sc->cmds[i].siop_table->t_msgout.count= htole32(1);
sc->cmds[i].siop_table->t_msgout.addr =
htole32(sc->cmds[i].dsa);
sc->cmds[i].siop_table->t_msgin.count= htole32(1);
sc->cmds[i].siop_table->t_msgin.addr =
htole32(sc->cmds[i].dsa + 8);
sc->cmds[i].siop_table->t_extmsgin.count= htole32(2);
sc->cmds[i].siop_table->t_extmsgin.addr =
htole32(le32toh(sc->cmds[i].siop_table->t_msgin.addr) + 1);
sc->cmds[i].siop_table->t_msgtag.count= htole32(2);
sc->cmds[i].siop_table->t_msgtag.addr =
htole32(le32toh(sc->cmds[i].siop_table->t_msgin.addr) + 1);
sc->cmds[i].siop_table->t_status.count= htole32(1);
sc->cmds[i].siop_table->t_status.addr =
htole32(le32toh(sc->cmds[i].siop_table->t_msgin.addr) + 8);
TAILQ_INSERT_TAIL(&sc->free_list, &sc->cmds[i], next);
#ifdef DEBUG
printf("tables[%d]: out=0x%x in=0x%x status=0x%x\n", i,
le32toh(sc->cmds[i].siop_table->t_msgin.addr),
le32toh(sc->cmds[i].siop_table->t_msgout.addr),
le32toh(sc->cmds[i].siop_table->t_status.addr));
#endif
}
/* compute number of sheduler slots */
sc->sc_nshedslots = (
CMD_OFF /* memory size allocated for scripts */
- sizeof(siop_script) /* memory for main script */
+ 8 /* extra NOP at end of main script */
- sizeof(endslot_script) /* memory needed at end of sheduler */
) / (sizeof(slot_script) - 8);
sc->sc_currshedslot = 0;
#ifdef DEBUG
printf("%s: script size = %d, PHY addr=0x%x, VIRT=%p nslots %d\n",
sc->sc_dev.dv_xname, (int)sizeof(siop_script),
(u_int)sc->sc_scriptdma->dm_segs[0].ds_addr, sc->sc_script,
sc->sc_nshedslots);
#endif
sc->sc_link.adapter_softc = sc;
sc->sc_link.openings = 1;
sc->sc_link.scsipi_scsi.channel = SCSI_CHANNEL_ONLY_ONE;
sc->sc_link.scsipi_scsi.max_target =
(sc->features & SF_BUS_WIDE) ? 15 : 7;
sc->sc_link.scsipi_scsi.max_lun = 7;
sc->sc_link.scsipi_scsi.adapter_target = bus_space_read_1(sc->sc_rt,
sc->sc_rh, SIOP_SCID);
if (sc->sc_link.scsipi_scsi.adapter_target == 0 ||
sc->sc_link.scsipi_scsi.adapter_target >
sc->sc_link.scsipi_scsi.max_target)
sc->sc_link.scsipi_scsi.adapter_target = SIOP_DEFAULT_TARGET;
sc->sc_link.type = BUS_SCSI;
sc->sc_link.adapter = &siop_adapter;
sc->sc_link.device = &siop_dev;
sc->sc_link.flags = 0;
for (i = 0; i < 16; i++)
sc->targets[i] = NULL;
/* find min/max sync period for this chip */
sc->maxsync = 0;
sc->minsync = 255;
for (i = 0; i < sizeof(scf_period) / sizeof(scf_period[0]); i++) {
if (sc->clock_period != scf_period[i].clock)
continue;
if (sc->maxsync < scf_period[i].period)
sc->maxsync = scf_period[i].period;
if (sc->minsync > scf_period[i].period)
sc->minsync = scf_period[i].period;
}
if (sc->maxsync == 255 || sc->minsync == 0)
panic("siop: can't find my sync parameters\n");
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;
u_int32_t *scr;
bus_addr_t physaddr;
siop_common_reset(sc);
/* copy and patch the script */
for (j = 0; j < (sizeof(siop_script) / sizeof(siop_script[0])); j++) {
sc->sc_script[j] = htole32(siop_script[j]);
}
/* copy the sheduler slots script */
for (i = 0; i < sc->sc_nshedslots; i++) {
scr = &sc->sc_script[Ent_sheduler / 4 + (Ent_nextslot / 4) * i];
physaddr = sc->sc_scriptdma->dm_segs[0].ds_addr + Ent_sheduler
+ Ent_nextslot * i;
for (j = 0; j < (sizeof(slot_script) / sizeof(slot_script[0]));
j++) {
scr[j] = htole32(slot_script[j]);
}
/*
* save current jump offset and patch MOVE MEMORY operands
* to restore it.
*/
scr[Ent_slotdata/4 + 1] = scr[Ent_slot/4 + 1];
scr[E_slot_nextp_Used[0]] = htole32(physaddr + Ent_slot + 4);
scr[E_slot_shed_addrsrc_Used[0]] = htole32(physaddr +
Ent_slotdata + 4);
/* JUMP selected, in main script */
scr[E_slot_abs_selected_Used[0]] =
htole32(sc->sc_scriptdma->dm_segs[0].ds_addr + Ent_selected);
/* JUMP addr if SELECT fail */
scr[E_slot_abs_reselect_Used[0]] =
htole32(sc->sc_scriptdma->dm_segs[0].ds_addr + Ent_reselect);
}
/* Now the final JUMP */
scr = &sc->sc_script[Ent_sheduler / 4 +
(Ent_nextslot / 4) * sc->sc_nshedslots];
for (j = 0; j < (sizeof(endslot_script) / sizeof(endslot_script[0]));
j++) {
scr[j] = htole32(endslot_script[j]);
}
scr[E_endslot_abs_reselect_Used[0]] =
htole32(sc->sc_scriptdma->dm_segs[0].ds_addr + Ent_reselect);
/* start script */
siop_script_sync(sc, BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
bus_space_write_4(sc->sc_rt, sc->sc_rh, SIOP_DSP,
sc->sc_scriptdma->dm_segs[0].ds_addr + Ent_reselect);
}
#if 0
#define CALL_SCRIPT(ent) do {\
printf ("start script DSA 0x%lx DSP 0x%lx\n", \
siop_cmd->dsa, \
sc->sc_scriptdma->dm_segs[0].ds_addr + ent); \
bus_space_write_4(sc->sc_rt, sc->sc_rh, SIOP_DSP, sc->sc_scriptdma->dm_segs[0].ds_addr + ent); \
} while (0)
#else
#define CALL_SCRIPT(ent) do {\
bus_space_write_4(sc->sc_rt, sc->sc_rh, SIOP_DSP, sc->sc_scriptdma->dm_segs[0].ds_addr + 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 scsipi_xfer *xs;
int istat, sist0, sist1, sstat1, dstat, scntl1;
u_int32_t irqcode;
int need_reset = 0;
int offset, target, lun;
bus_addr_t dsa;
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);
if (dsa >= sc->sc_scriptdma->dm_segs[0].ds_addr + CMD_OFF &&
dsa < sc->sc_scriptdma->dm_segs[0].ds_addr + CMD_OFF +
SIOP_NCMD * sizeof(struct siop_xfer)) {
dsa -= sc->sc_scriptdma->dm_segs[0].ds_addr + CMD_OFF;
siop_cmd = &sc->cmds[dsa / sizeof(struct siop_xfer)];
siop_table_sync(siop_cmd,
BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
} else {
printf("%s: current DSA invalid\n",
sc->sc_dev.dv_xname);
siop_cmd = NULL;
}
if (istat & ISTAT_DIP) {
u_int32_t *p;
dstat = bus_space_read_1(sc->sc_rt, sc->sc_rh, SIOP_DSTAT);
if (dstat & DSTAT_SSI) {
printf("single step dsp 0x%08x dsa 0x08%x\n",
(int)(bus_space_read_4(sc->sc_rt, sc->sc_rh, SIOP_DSP) -
sc->sc_scriptdma->dm_segs[0].ds_addr),
bus_space_read_4(sc->sc_rt, sc->sc_rh, SIOP_DSA));
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: ",
(int)(bus_space_read_4(sc->sc_rt, sc->sc_rh, SIOP_DSP) -
sc->sc_scriptdma->dm_segs[0].ds_addr),
bus_space_read_4(sc->sc_rt, sc->sc_rh, SIOP_DSA));
p = sc->sc_script +
(bus_space_read_4(sc->sc_rt, sc->sc_rh, SIOP_DSP) -
sc->sc_scriptdma->dm_segs[0].ds_addr - 8) / 4;
printf("0x%x 0x%x 0x%x 0x%x\n", le32toh(p[0]), le32toh(p[1]),
le32toh(p[2]), le32toh(p[3]));
if (siop_cmd)
printf("last msg_in=0x%x status=0x%x\n",
siop_cmd->siop_table->msg_in[0],
le32toh(siop_cmd->siop_table->status));
need_reset = 1;
}
}
if (istat & ISTAT_SIP) {
/*
* SCSI interrupt. If current command is not active,
* we don't need siop_cmd
*/
if (siop_cmd->status != CMDST_ACTIVE &&
siop_cmd->status != CMDST_SENSE_ACTIVE) {
siop_cmd = NULL;
}
if (istat & ISTAT_DIP)
delay(10);
sist0 = bus_space_read_1(sc->sc_rt, sc->sc_rh, SIOP_SIST0);
delay(10);
sist1 = bus_space_read_1(sc->sc_rt, sc->sc_rh, SIOP_SIST1);
sstat1 = bus_space_read_1(sc->sc_rt, sc->sc_rh, SIOP_SSTAT1);
#ifdef DEBUG_INTR
printf("scsi interrupt, sist0=0x%x sist1=0x%x sstat1=0x%x "
"DSA=0x%x DSP=0x%lx\n", sist0, sist1,
bus_space_read_1(sc->sc_rt, sc->sc_rh, SIOP_SSTAT1),
bus_space_read_4(sc->sc_rt, sc->sc_rh, SIOP_DSA),
(u_long)(bus_space_read_4(sc->sc_rt, sc->sc_rh, SIOP_DSP) -
sc->sc_scriptdma->dm_segs[0].ds_addr));
#endif
if (siop_cmd) {
xs = siop_cmd->xs;
siop_target = siop_cmd->siop_target;
}
if (sist0 & SIST0_RST) {
siop_handle_reset(sc);
siop_start(sc);
/* no table to flush here */
return 1;
}
if (sist0 & SIST0_SGE) {
if (siop_cmd)
scsi_print_addr(xs->sc_link);
else
printf("%s:", sc->sc_dev.dv_xname);
printf("scsi gross error\n");
goto reset;
}
if ((sist0 & 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 be 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);
CALL_SCRIPT(Ent_status);
if ((dstat & DSTAT_DFE) == 0)
siop_clearfifo(sc);
/* no table to flush here */
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 (sist0 & SIST0_PAR) {
/* parity error, reset */
if (siop_cmd)
scsi_print_addr(xs->sc_link);
else
printf("%s:", sc->sc_dev.dv_xname);
printf("parity error\n");
goto reset;
}
if ((sist1 & SIST1_STO) && need_reset == 0) {
/* selection time out, assume there's no device here */
if (siop_cmd) {
siop_cmd->status = CMDST_DONE;
xs->error = XS_SELTIMEOUT;
goto end;
} else {
printf("%s: selection timeout without "
"command\n", sc->sc_dev.dv_xname);
need_reset = 1;
}
}
if (sist0 & SIST0_UDC) {
/*
* unexpected disconnect. Usually the target signals
* a fatal condition this way. Attempt to get sense.
*/
if (siop_cmd)
goto check_sense;
printf("%s: unexpected disconnect without "
"command\n", sc->sc_dev.dv_xname);
goto reset;
}
/* Else it's an unhandled exeption (for now). */
printf("%s: unhandled scsi interrupt, sist0=0x%x sist1=0x%x "
"sstat1=0x%x DSA=0x%x DSP=0x%x\n", sc->sc_dev.dv_xname,
sist0, sist1,
bus_space_read_1(sc->sc_rt, sc->sc_rh, SIOP_SSTAT1),
bus_space_read_4(sc->sc_rt, sc->sc_rh, SIOP_DSA),
(int)(bus_space_read_4(sc->sc_rt, sc->sc_rh, SIOP_DSP) -
sc->sc_scriptdma->dm_segs[0].ds_addr));
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 */
scntl1 = bus_space_read_1(sc->sc_rt, sc->sc_rh, SIOP_SCNTL1);
bus_space_write_1(sc->sc_rt, sc->sc_rh, SIOP_SCNTL1,
scntl1 | SCNTL1_RST);
/* minimum 25 us, more time won't hurt */
delay(100);
bus_space_write_1(sc->sc_rt, sc->sc_rh, SIOP_SCNTL1, scntl1);
/* no table to flush here */
return 1;
}
if ((istat & ISTAT_DIP) && (dstat & DSTAT_SIR)) { /* script interrupt */
irqcode = bus_space_read_4(sc->sc_rt, sc->sc_rh,
SIOP_DSPS);
#ifdef DEBUG_INTR
printf("script interrupt 0x%x\n", irqcode);
#endif
/*
* an inactive command is only valid if it's a reselect
* interrupt: we'll change siop_cmd to point to the rigth one
* just here
*/
if (irqcode != A_int_resel && irqcode != A_int_reseltag &&
siop_cmd->status != CMDST_ACTIVE &&
siop_cmd->status != CMDST_SENSE_ACTIVE) {
printf("%s: Aie, no command (IRQ code 0x%x current "
"status %d) !\n", sc->sc_dev.dv_xname,
irqcode, siop_cmd->status);
xs = NULL;
} else {
xs = siop_cmd->xs;
siop_target = siop_cmd->siop_target;
}
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_scriptdma->dm_segs[0].ds_addr));
if (xs) {
xs->error = XS_SELTIMEOUT;
goto end;
} else {
goto reset;
}
case A_int_msgin:
if (siop_cmd->siop_table->msg_in[0] ==
MSG_MESSAGE_REJECT) {
int msg, extmsg;
if (siop_cmd->siop_table->msg_out[0] & 0x80) {
/*
* message was part of a identify +
* something else. Identify shoudl't
* have been rejected.
*/
msg = siop_cmd->siop_table->msg_out[1];
extmsg =
siop_cmd->siop_table->msg_out[3];
} else {
msg = siop_cmd->siop_table->msg_out[0];
extmsg =
siop_cmd->siop_table->msg_out[2];
}
if (msg == MSG_MESSAGE_REJECT) {
/* MSG_REJECT for a MSG_REJECT !*/
if (xs)
scsi_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) {
/* WDTR rejected, initiate sync */
printf("%s: target %d using 8bit "
"transfers\n", sc->sc_dev.dv_xname,
xs->sc_link->scsipi_scsi.target);
siop_target->status = TARST_SYNC_NEG;
siop_cmd->siop_table->msg_out[0] =
MSG_EXTENDED;
siop_cmd->siop_table->msg_out[1] =
MSG_EXT_SDTR_LEN;
siop_cmd->siop_table->msg_out[2] =
MSG_EXT_SDTR;
siop_cmd->siop_table->msg_out[3] =
sc->minsync;
siop_cmd->siop_table->msg_out[4] =
sc->maxoff;
siop_cmd->siop_table->t_msgout.count =
htole32(MSG_EXT_SDTR_LEN + 2);
siop_cmd->siop_table->t_msgout.addr =
htole32(siop_cmd->dsa);
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 */
printf("%s: target %d asynchronous\n",
sc->sc_dev.dv_xname,
xs->sc_link->scsipi_scsi.target);
siop_cmd->siop_target->status =
TARST_OK;
/* no table to flush here */
CALL_SCRIPT(Ent_msgin_ack);
return 1;
}
if (xs)
scsi_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)
scsi_print_addr(xs->sc_link);
else
printf("%s: ", sc->sc_dev.dv_xname);
printf("unhandled message 0x%x\n",
siop_cmd->siop_table->msg_in[0]);
siop_cmd->siop_table->t_msgout.count= htole32(1);
siop_cmd->siop_table->t_msgout.addr =
htole32(siop_cmd->dsa);
siop_cmd->siop_table->msg_out[0] = MSG_MESSAGE_REJECT;
siop_table_sync(siop_cmd,
BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
CALL_SCRIPT(Ent_send_msgout);
return 1;
case A_int_extmsgin:
#ifdef DEBUG_INTR
printf("extended message: msg 0x%x len %d\n",
siop_cmd->siop_table->msg_in[2],
siop_cmd->siop_table->msg_in[1]);
#endif
if (siop_cmd->siop_table->msg_in[1] > 6)
printf("%s: extended message too big (%d)\n",
sc->sc_dev.dv_xname,
siop_cmd->siop_table->msg_in[1]);
siop_cmd->siop_table->t_extmsgdata.count =
htole32(siop_cmd->siop_table->msg_in[1] - 1);
siop_cmd->siop_table->t_extmsgdata.addr =
htole32(
le32toh(siop_cmd->siop_table->t_extmsgin.addr)
+ 2);
siop_table_sync(siop_cmd,
BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
CALL_SCRIPT(Ent_get_extmsgdata);
return 1;
case A_int_extmsgdata:
#ifdef DEBUG_INTR
{
int i;
printf("extended message: 0x%x, data:",
siop_cmd->siop_table->msg_in[2]);
for (i = 3; i < 2 + siop_cmd->siop_table->msg_in[1];
i++)
printf(" 0x%x",
siop_cmd->siop_table->msg_in[i]);
printf("\n");
}
#endif
if (siop_cmd->siop_table->msg_in[2] == MSG_EXT_WDTR) {
switch (siop_wdtr_neg(siop_cmd)) {
case SIOP_NEG_NOP:
break;
case SIOP_NEG_MSGOUT:
siop_table_sync(siop_cmd,
BUS_DMASYNC_PREREAD |
BUS_DMASYNC_PREWRITE);
CALL_SCRIPT(Ent_send_msgout);
break;
default:
panic("invalid retval from "
"siop_wdtr_neg()");
}
return(1);
}
if (siop_cmd->siop_table->msg_in[2] == MSG_EXT_SDTR) {
switch (siop_sdtr_neg(siop_cmd)) {
case SIOP_NEG_NOP:
break;
case SIOP_NEG_MSGOUT:
siop_table_sync(siop_cmd,
BUS_DMASYNC_PREREAD |
BUS_DMASYNC_PREWRITE);
CALL_SCRIPT(Ent_send_msgout);
break;
case SIOP_NEG_ACK:
CALL_SCRIPT(Ent_msgin_ack);
break;
default:
panic("invalid retval from "
"siop_wdtr_neg()");
}
return(1);
}
/* send a message reject */
siop_cmd->siop_table->t_msgout.count =
htole32(1);
siop_cmd->siop_table->t_msgout.addr =
htole32(siop_cmd->dsa);
siop_cmd->siop_table->msg_out[0] =
MSG_MESSAGE_REJECT;
siop_table_sync(siop_cmd,
BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
CALL_SCRIPT(Ent_send_msgout);
return 1;
case A_int_resel: /* reselected */
case A_int_reseltag: /* reselected with tag */
INCSTAT(siop_stat_intr_reselect);
if ((siop_cmd->siop_table->msg_in[0] & 0x80) == 0) {
printf("%s: reselect without identify (%d)\n",
sc->sc_dev.dv_xname,
siop_cmd->siop_table->msg_in[0]);
goto reset;
}
target = bus_space_read_1(sc->sc_rt,
sc->sc_rh, SIOP_SCRATCHA);
if ((target & 0x80) == 0) {
printf("reselect without id (%d)\n", target);
goto reset;
}
target &= 0x0f;
lun = siop_cmd->siop_table->msg_in[0] & 0x07;
#ifdef DEBUG_DR
printf("reselected by target %d lun %d\n",
target, lun);
#endif
siop_cmd =
sc->targets[target]->active_list[lun].tqh_first;
if (siop_cmd == NULL) {
printf("%s: reselected without cmd\n",
sc->sc_dev.dv_xname);
goto reset;
}
bus_space_write_4(sc->sc_rt, sc->sc_rh, SIOP_DSA,
siop_cmd->dsa);
bus_space_write_1(sc->sc_rt, sc->sc_rh, SIOP_SCNTL3,
(sc->targets[target]->id >> 24) & 0xff);
bus_space_write_1(sc->sc_rt, sc->sc_rh, SIOP_SCXFER,
(sc->targets[target]->id >> 8) & 0xff);
/* no table to flush */
CALL_SCRIPT(Ent_selected);
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 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) {
memmove(&siop_cmd->siop_table->data[0],
&siop_cmd->siop_table->data[offset],
(SIOP_NSG - offset) * sizeof(scr_table_t));
siop_table_sync(siop_cmd,
BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
}
CALL_SCRIPT(Ent_sheduler);
return 1;
case A_int_resfail:
printf("reselect failed\n");
CALL_SCRIPT(Ent_sheduler);
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;
CALL_SCRIPT(Ent_sheduler);
siop_start(sc);
return 1;
}
if (siop_target->status == TARST_PROBING)
siop_target->status = TARST_ASYNC;
#ifdef 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,
le32toh(siop_cmd->siop_table->id),
siop_cmd->siop_table->msg_in[0],
le32toh(siop_cmd->siop_table->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;
switch(le32toh(siop_cmd->siop_table->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:
check_sense:
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 0xff:
/*
* the status byte was not updated, cmd was
* aborted
*/
xs->error = XS_SELTIMEOUT;
break;
default:
xs->error = XS_DRIVER_STUFFUP;
}
goto end;
default:
printf("unknown irqcode %x\n", irqcode);
xs->error = XS_SELTIMEOUT;
goto end;
}
return 1;
}
/* We just should't get there */
panic("siop_intr: I shouldn't be there !");
return 1;
end:
bus_space_write_4(sc->sc_rt, sc->sc_rh, SIOP_DSP,
sc->sc_scriptdma->dm_segs[0].ds_addr + Ent_sheduler);
lun = siop_cmd->xs->sc_link->scsipi_scsi.lun;
siop_scsicmd_end(siop_cmd);
if (siop_cmd->status == CMDST_FREE) {
TAILQ_REMOVE(&siop_target->active_list[lun],
siop_cmd, next);
TAILQ_INSERT_TAIL(&sc->free_list, siop_cmd, next);
}
siop_start(sc);
return 1;
}
void
siop_scsicmd_end(siop_cmd)
struct siop_cmd *siop_cmd;
{
struct scsipi_xfer *xs = siop_cmd->xs;
struct siop_softc *sc = siop_cmd->siop_target->siop_sc;
if (siop_cmd->status != CMDST_SENSE_DONE &&
xs->xs_control & (XS_CTL_DATA_IN | XS_CTL_DATA_OUT)) {
bus_dmamap_sync(sc->sc_dmat, siop_cmd->dmamap_data, 0,
siop_cmd->dmamap_data->dm_mapsize,
(xs->xs_control & XS_CTL_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, i;
siop_cmd->rs_cmd.opcode = REQUEST_SENSE;
siop_cmd->rs_cmd.byte2 = xs->sc_link->scsipi_scsi.lun << 5;
siop_cmd->rs_cmd.unused[0] = siop_cmd->rs_cmd.unused[1] = 0;
siop_cmd->rs_cmd.length = sizeof(struct scsipi_sense_data);
siop_cmd->rs_cmd.control = 0;
siop_cmd->siop_table->status = htole32(0xff); /*invalid status*/
siop_cmd->siop_table->t_msgout.count= htole32(1);
siop_cmd->siop_table->t_msgout.addr = htole32(siop_cmd->dsa);
siop_cmd->siop_table->msg_out[0] =
MSG_IDENTIFY(xs->sc_link->scsipi_scsi.lun, 1);
error = bus_dmamap_load(sc->sc_dmat, siop_cmd->dmamap_cmd,
&siop_cmd->rs_cmd, sizeof(struct scsipi_sense),
NULL, BUS_DMA_NOWAIT);
if (error) {
printf("%s: unable to load cmd DMA map: %d",
sc->sc_dev.dv_xname, error);
xs->error = XS_DRIVER_STUFFUP;
goto out;
}
siop_cmd->siop_table->cmd.count =
htole32(siop_cmd->dmamap_cmd->dm_segs[0].ds_len);
siop_cmd->siop_table->cmd.addr =
htole32(siop_cmd->dmamap_cmd->dm_segs[0].ds_addr);
error = bus_dmamap_load(sc->sc_dmat, siop_cmd->dmamap_data,
&xs->sense.scsi_sense, sizeof(struct scsipi_sense_data),
NULL, BUS_DMA_NOWAIT);
if (error) {
printf("%s: unable to load sense DMA map: %d",
sc->sc_dev.dv_xname, error);
xs->error = XS_DRIVER_STUFFUP;
bus_dmamap_unload(sc->sc_dmat, siop_cmd->dmamap_cmd);
goto out;
}
for (i = 0; i < siop_cmd->dmamap_data->dm_nsegs; i++) {
siop_cmd->siop_table->data[i].count =
htole32(siop_cmd->dmamap_data->dm_segs[i].ds_len);
siop_cmd->siop_table->data[i].addr =
htole32(siop_cmd->dmamap_data->dm_segs[i].ds_addr);
}
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_table_sync(siop_cmd, BUS_DMASYNC_PREWRITE);
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:
callout_stop(&siop_cmd->xs->xs_callout);
siop_cmd->status = CMDST_FREE;
xs->xs_status |= XS_STS_DONE;
xs->resid = 0;
if ((xs->xs_control & XS_CTL_POLL) == 0)
scsipi_done (xs);
}
/*
* handle a bus reset: reset chip, unqueue all active commands and report
* loosage to upper layer.
* As the upper layer may requeue immediatly 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;
int target, lun;
/*
* 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);
/* find all active commands */
for (target = 0; target < sc->sc_link.scsipi_scsi.max_target;
target++) {
if (sc->targets[target] == NULL)
continue;
for (lun = 0; lun < 8; lun++) {
for (siop_cmd =
TAILQ_FIRST(&sc->targets[target]->active_list[lun]);
siop_cmd != NULL; siop_cmd = next_siop_cmd) {
next_siop_cmd = TAILQ_NEXT(siop_cmd, next);
if (siop_cmd->status < CMDST_ACTIVE)
continue;
printf("cmd %p (target %d) in reset list\n",
siop_cmd, target);
TAILQ_REMOVE(
&sc->targets[target]->active_list[lun],
siop_cmd, next);
TAILQ_INSERT_TAIL(&reset_list, siop_cmd, next);
}
}
sc->targets[target]->status = TARST_ASYNC;
sc->targets[target]->flags = ~(TARF_SYNC | TARF_WIDE);
}
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;
printf("cmd %p about to be processed\n", siop_cmd);
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 scsipi_xfer *xs;
{
struct siop_softc *sc = (struct siop_softc *)xs->sc_link->adapter_softc;
struct siop_cmd *siop_cmd;
int s, error, i;
int target = xs->sc_link->scsipi_scsi.target;
int lun = xs->sc_link->scsipi_scsi.lun;
s = splbio();
#ifdef DEBUG_SHED
printf("starting cmd for %d:%d\n", target, lun);
#endif
siop_cmd = sc->free_list.tqh_first;
if (siop_cmd) {
TAILQ_REMOVE(&sc->free_list, siop_cmd, next);
}
splx(s);
if (siop_cmd == NULL) {
xs->error = XS_DRIVER_STUFFUP;
return(TRY_AGAIN_LATER);
}
#ifdef DIAGNOSTIC
if (siop_cmd->status != CMDST_FREE)
panic("siop_scsicmd: new cmd not free");
#endif
if (sc->targets[target] == NULL) {
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;
return(TRY_AGAIN_LATER);
}
sc->targets[target]->siop_sc = sc;
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 */
for (i = 0; i < 8; i++)
TAILQ_INIT(&sc->targets[target]->active_list[i]);
}
siop_cmd->siop_target = sc->targets[target];
siop_cmd->xs = xs;
siop_cmd->siop_table->id = htole32(sc->targets[target]->id);
siop_cmd->siop_table->t_msgout.count= htole32(1);
siop_cmd->siop_table->t_msgout.addr = htole32(siop_cmd->dsa);
memset(siop_cmd->siop_table->msg_out, 0, 8);
siop_cmd->siop_table->msg_out[0] = MSG_IDENTIFY(lun, 1);
#if 0
siop_cmd->siop_table->msg_out[1] = MSG_SIMPLE_Q_TAG;
siop_cmd->siop_table->msg_out[2] = 0;
#endif
if (sc->targets[target]->status == TARST_ASYNC) {
if (sc->features & SF_BUS_WIDE) {
sc->targets[target]->status = TARST_WIDE_NEG;
siop_cmd->siop_table->msg_out[1] = MSG_EXTENDED;
siop_cmd->siop_table->msg_out[2] = MSG_EXT_WDTR_LEN;
siop_cmd->siop_table->msg_out[3] = MSG_EXT_WDTR;
siop_cmd->siop_table->msg_out[4] =
MSG_EXT_WDTR_BUS_16_BIT;
siop_cmd->siop_table->t_msgout.count=
htole32(MSG_EXT_WDTR_LEN + 2 + 1);
} else {
sc->targets[target]->status = TARST_SYNC_NEG;
siop_cmd->siop_table->msg_out[1] = MSG_EXTENDED;
siop_cmd->siop_table->msg_out[2] = MSG_EXT_SDTR_LEN;
siop_cmd->siop_table->msg_out[3] = MSG_EXT_SDTR;
siop_cmd->siop_table->msg_out[4] = sc->minsync;
siop_cmd->siop_table->msg_out[5] = sc->maxoff;
siop_cmd->siop_table->t_msgout.count=
htole32(MSG_EXT_SDTR_LEN + 2 +1);
}
}
siop_cmd->siop_table->status = htole32(0xff); /* set invalid status */
/* 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",
sc->sc_dev.dv_xname, error);
xs->error = XS_DRIVER_STUFFUP;
return(TRY_AGAIN_LATER);
}
siop_cmd->siop_table->cmd.count =
htole32(siop_cmd->dmamap_cmd->dm_segs[0].ds_len);
siop_cmd->siop_table->cmd.addr =
htole32(siop_cmd->dmamap_cmd->dm_segs[0].ds_addr);
if (xs->xs_control & (XS_CTL_DATA_IN | XS_CTL_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",
sc->sc_dev.dv_xname, error);
xs->error = XS_DRIVER_STUFFUP;
return(TRY_AGAIN_LATER);
bus_dmamap_unload(sc->sc_dmat, siop_cmd->dmamap_cmd);
}
for (i = 0; i < siop_cmd->dmamap_data->dm_nsegs; i++) {
siop_cmd->siop_table->data[i].count =
htole32(siop_cmd->dmamap_data->dm_segs[i].ds_len);
siop_cmd->siop_table->data[i].addr =
htole32(siop_cmd->dmamap_data->dm_segs[i].ds_addr);
}
bus_dmamap_sync(sc->sc_dmat, siop_cmd->dmamap_data, 0,
siop_cmd->dmamap_data->dm_mapsize,
(xs->xs_control & XS_CTL_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_table_sync(siop_cmd, BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
siop_cmd->status = CMDST_READY;
s = splbio();
TAILQ_INSERT_TAIL(&sc->targets[target]->active_list[lun],
siop_cmd, next);
siop_start(sc);
if (xs->xs_control & XS_CTL_POLL) {
/* poll for command completion */
while ((xs->xs_status & XS_STS_DONE) == 0)
siop_intr(sc);
splx(s);
return (COMPLETE);
}
splx(s);
return (SUCCESSFULLY_QUEUED);
}
void
siop_start(sc)
struct siop_softc *sc;
{
struct siop_cmd *siop_cmd;
u_int32_t *scr;
u_int32_t dsa;
int timeout;
int target, lun, slot;
int newcmd = 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_currshedslot;
scr = &sc->sc_script[Ent_sheduler / 4 +
(Ent_nextslot / 4) * slot];
/*
* if relative addr of first jump is not 0 the slot is free. As this is
* the last used slot, all previous slots are free, we can restart
* from 0.
*/
if (scr[Ent_slot / 4 + 1] != 0) {
slot = sc->sc_currshedslot = 0;
} else {
slot++;
}
for (target = 0; target <= sc->sc_link.scsipi_scsi.max_target;
target++) {
if (sc->targets[target] == NULL)
continue;
for (lun = 0; lun < 8; lun++) {
siop_cmd =
sc->targets[target]->active_list[lun].tqh_first;
if (siop_cmd == NULL)
continue;
if (siop_cmd->status != CMDST_READY &&
siop_cmd->status != CMDST_SENSE)
continue;
/* find a free sheduler slot and load it */
for (; slot < sc->sc_nshedslots; slot++) {
scr = &sc->sc_script[Ent_sheduler / 4 +
(Ent_nextslot / 4) * slot];
/*
* if relative addr of first jump is 0 the
* slot isn't free
*/
if (scr[Ent_slot / 4 + 1] == 0)
continue;
#ifdef DEBUG_SHED
printf("using slot %d for DSA 0x%lx\n", slot,
(u_long)siop_cmd->dsa);
#endif
/* 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");
/* patch script with DSA addr */
dsa = siop_cmd->dsa;
/*
* 0x78000000 is a 'move data8 to reg'. data8
* is the second octet, reg offset is the third.
*/
scr[Ent_idsa0 / 4] =
htole32(0x78100000 |
((dsa & 0x000000ff) << 8));
scr[Ent_idsa1 / 4] =
htole32(0x78110000 |
( dsa & 0x0000ff00 ));
scr[Ent_idsa2 / 4] =
htole32(0x78120000 |
((dsa & 0x00ff0000) >> 8));
scr[Ent_idsa3 / 4] =
htole32(0x78130000 |
((dsa & 0xff000000) >> 16));
/* handle timeout */
if (siop_cmd->status == CMDST_ACTIVE) {
if ((siop_cmd->xs->xs_control &
XS_CTL_POLL) == 0) {
/* start exire timer */
timeout =
siop_cmd->xs->timeout *
hz / 1000;
if (timeout == 0)
timeout = 1;
callout_reset(
&siop_cmd->xs->xs_callout,
timeout, siop_timeout,
siop_cmd);
}
}
/*
* Change jump offset so that this slot will be
* handled
*/
scr[Ent_slot / 4 + 1] = 0;
break;
}
/* no more free slot, no need to continue */
if (slot == sc->sc_nshedslots) {
goto end;
}
sc->sc_currshedslot = slot;
}
}
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_target->siop_sc;
int s;
u_int8_t scntl1;
scsi_print_addr(siop_cmd->xs->sc_link);
printf("command timeout\n");
s = splbio();
/* reset the scsi bus */
scntl1 = bus_space_read_1(sc->sc_rt, sc->sc_rh, SIOP_SCNTL1);
bus_space_write_1(sc->sc_rt, sc->sc_rh, SIOP_SCNTL1,
scntl1 | SCNTL1_RST);
/* minimum 25 us, more time won't hurt */
delay(100);
bus_space_write_1(sc->sc_rt, sc->sc_rh, SIOP_SCNTL1, scntl1);
/* deactivate callout */
callout_stop(&siop_cmd->xs->xs_callout);
/* mark command has being timed out; siop_intr will handle it */
/*
* mark command has being timed out and just return;
* the bus reset will generate an interrupt,
* it 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;
siop_script_sync(sc, BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
for (i = 0; i < CMD_OFF / 4; i += 2) {
printf("0x%04x: 0x%08x 0x%08x", i * 4,
le32toh(sc->sc_script[i]), le32toh(sc->sc_script[i+1]));
if ((le32toh(sc->sc_script[i]) & 0xe0000000) == 0xc0000000) {
i++;
printf(" 0x%08x", le32toh(sc->sc_script[i+1]));
}
printf("\n");
}
}
#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_reselect %d\n", siop_stat_intr_reselect);
printf("siop_stat_intr_done %d\n", siop_stat_intr_done);
}
#endif
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