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src/sys/dev/ic/siop_common.c

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/* $OpenBSD: siop_common.c,v 1.45 2024/04/13 23:44:11 jsg Exp $ */
/* $NetBSD: siop_common.c,v 1.37 2005/02/27 00:27:02 perry Exp $ */
/*
* Copyright (c) 2000, 2002 Manuel Bouyer.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
/* SYM53c7/8xx PCI-SCSI I/O Processors driver */
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/malloc.h>
#include <sys/buf.h>
#include <sys/kernel.h>
#include <sys/scsiio.h>
#include <sys/endian.h>
#include <machine/bus.h>
#include <scsi/scsi_all.h>
#include <scsi/scsi_message.h>
#include <scsi/scsiconf.h>
#define SIOP_NEEDS_PERIOD_TABLES
#include <dev/ic/siopreg.h>
#include <dev/ic/siopvar_common.h>
#include <dev/ic/siopvar.h>
#undef DEBUG
#undef DEBUG_DR
#undef DEBUG_NEG
int
siop_common_attach(struct siop_common_softc *sc)
{
int error, i, buswidth;
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;
}
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;
}
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;
}
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 error;
}
sc->sc_scriptaddr =
sc->sc_scriptdma->dm_segs[0].ds_addr;
sc->ram_size = PAGE_SIZE;
}
/*
* 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().
*/
buswidth = (sc->features & SF_BUS_WIDE) ? 16 : 8;
sc->sc_id = bus_space_read_1(sc->sc_rt, sc->sc_rh, SIOP_SCID);
if (sc->sc_id == 0 || sc->sc_id >= buswidth)
sc->sc_id = SIOP_DEFAULT_TARGET;
for (i = 0; i < 16; i++)
sc->targets[i] = NULL;
/* find min/max sync period for this chip */
sc->st_maxsync = 0;
sc->dt_maxsync = 0;
sc->st_minsync = 255;
sc->dt_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->st_maxsync < scf_period[i].period)
sc->st_maxsync = scf_period[i].period;
if (sc->st_minsync > scf_period[i].period)
sc->st_minsync = scf_period[i].period;
}
if (sc->st_maxsync == 255 || sc->st_minsync == 0)
panic("siop: can't find my sync parameters");
for (i = 0; i < sizeof(dt_scf_period) / sizeof(dt_scf_period[0]); i++) {
if (sc->clock_period != dt_scf_period[i].clock)
continue;
if (sc->dt_maxsync < dt_scf_period[i].period)
sc->dt_maxsync = dt_scf_period[i].period;
if (sc->dt_minsync > dt_scf_period[i].period)
sc->dt_minsync = dt_scf_period[i].period;
}
if (sc->dt_maxsync == 255 || sc->dt_minsync == 0)
panic("siop: can't find my sync parameters");
return 0;
}
void
siop_common_reset(struct siop_common_softc *sc)
{
u_int32_t stest3;
/* reset the chip */
bus_space_write_1(sc->sc_rt, sc->sc_rh, SIOP_ISTAT, ISTAT_SRST);
delay(1000);
bus_space_write_1(sc->sc_rt, sc->sc_rh, SIOP_ISTAT, 0);
/* init registers */
bus_space_write_1(sc->sc_rt, sc->sc_rh, SIOP_SCNTL0,
SCNTL0_ARB_MASK | SCNTL0_EPC | SCNTL0_AAP);
bus_space_write_1(sc->sc_rt, sc->sc_rh, SIOP_SCNTL1, 0);
bus_space_write_1(sc->sc_rt, sc->sc_rh, SIOP_SCNTL3, sc->clock_div);
bus_space_write_1(sc->sc_rt, sc->sc_rh, SIOP_SXFER, 0);
bus_space_write_1(sc->sc_rt, sc->sc_rh, SIOP_DIEN, 0xff);
bus_space_write_1(sc->sc_rt, sc->sc_rh, SIOP_SIEN0,
0xff & ~(SIEN0_CMP | SIEN0_SEL | SIEN0_RSL));
bus_space_write_1(sc->sc_rt, sc->sc_rh, SIOP_SIEN1,
0xff & ~(SIEN1_HTH | SIEN1_GEN));
bus_space_write_1(sc->sc_rt, sc->sc_rh, SIOP_STEST2, 0);
bus_space_write_1(sc->sc_rt, sc->sc_rh, SIOP_STEST3, STEST3_TE);
bus_space_write_1(sc->sc_rt, sc->sc_rh, SIOP_STIME0,
(0xb << STIME0_SEL_SHIFT));
bus_space_write_1(sc->sc_rt, sc->sc_rh, SIOP_SCID,
sc->sc_id | SCID_RRE);
bus_space_write_1(sc->sc_rt, sc->sc_rh, SIOP_RESPID0,
1 << sc->sc_id);
bus_space_write_1(sc->sc_rt, sc->sc_rh, SIOP_DCNTL,
(sc->features & SF_CHIP_PF) ? DCNTL_COM | DCNTL_PFEN : DCNTL_COM);
if (sc->features & SF_CHIP_AAIP)
bus_space_write_1(sc->sc_rt, sc->sc_rh,
SIOP_AIPCNTL1, AIPCNTL1_DIS);
/* enable clock doubler or quadrupler if appropriate */
if (sc->features & (SF_CHIP_DBLR | SF_CHIP_QUAD)) {
stest3 = bus_space_read_1(sc->sc_rt, sc->sc_rh, SIOP_STEST3);
bus_space_write_1(sc->sc_rt, sc->sc_rh, SIOP_STEST1,
STEST1_DBLEN);
if (sc->features & SF_CHIP_QUAD) {
/* wait for PPL to lock */
while ((bus_space_read_1(sc->sc_rt, sc->sc_rh,
SIOP_STEST4) & STEST4_LOCK) == 0)
delay(10);
} else {
/* data sheet says 20us - more won't hurt */
delay(100);
}
/* halt scsi clock, select doubler/quad, restart clock */
bus_space_write_1(sc->sc_rt, sc->sc_rh, SIOP_STEST3,
stest3 | STEST3_HSC);
bus_space_write_1(sc->sc_rt, sc->sc_rh, SIOP_STEST1,
STEST1_DBLEN | STEST1_DBLSEL);
bus_space_write_1(sc->sc_rt, sc->sc_rh, SIOP_STEST3, stest3);
} else {
bus_space_write_1(sc->sc_rt, sc->sc_rh, SIOP_STEST1, 0);
}
if (sc->features & SF_CHIP_FIFO)
bus_space_write_1(sc->sc_rt, sc->sc_rh, SIOP_CTEST5,
bus_space_read_1(sc->sc_rt, sc->sc_rh, SIOP_CTEST5) |
CTEST5_DFS);
if (sc->features & SF_CHIP_LED0) {
/* Set GPIO0 as output if software LED control is required */
bus_space_write_1(sc->sc_rt, sc->sc_rh, SIOP_GPCNTL,
bus_space_read_1(sc->sc_rt, sc->sc_rh, SIOP_GPCNTL) & 0xfe);
}
if (sc->features & SF_BUS_ULTRA3) {
/* reset SCNTL4 */
bus_space_write_1(sc->sc_rt, sc->sc_rh, SIOP_SCNTL4, 0);
}
sc->mode = bus_space_read_1(sc->sc_rt, sc->sc_rh, SIOP_STEST4) &
STEST4_MODE_MASK;
/*
* initialise the RAM. Without this we may get scsi gross errors on
* the 1010
*/
if (sc->features & SF_CHIP_RAM)
bus_space_set_region_4(sc->sc_ramt, sc->sc_ramh,
0, 0, sc->ram_size / 4);
sc->sc_reset(sc);
}
/* prepare tables before sending a cmd */
void
siop_setuptables(struct siop_common_cmd *siop_cmd)
{
int i;
struct siop_common_softc *sc = siop_cmd->siop_sc;
struct scsi_xfer *xs = siop_cmd->xs;
int target = xs->sc_link->target;
int lun = xs->sc_link->lun;
int msgoffset = 1;
int *targ_flags = &sc->targets[target]->flags;
int quirks;
siop_cmd->siop_tables->id = siop_htoc32(sc, sc->targets[target]->id);
memset(siop_cmd->siop_tables->msg_out, 0,
sizeof(siop_cmd->siop_tables->msg_out));
/* request sense doesn't disconnect */
if (siop_cmd->status == CMDST_SENSE)
siop_cmd->siop_tables->msg_out[0] = MSG_IDENTIFY(lun, 0);
else if ((sc->features & SF_CHIP_GEBUG) &&
(sc->targets[target]->flags & TARF_ISWIDE) == 0)
/*
* 1010 bug: it seems that the 1010 has problems with reselect
* when not in wide mode (generate false SCSI gross error).
* The FreeBSD sym driver has comments about it but their
* workaround (disable SCSI gross error reporting) doesn't
* work with my adapter. So disable disconnect when not
* wide.
*/
siop_cmd->siop_tables->msg_out[0] = MSG_IDENTIFY(lun, 0);
else
siop_cmd->siop_tables->msg_out[0] = MSG_IDENTIFY(lun, 1);
siop_cmd->siop_tables->t_msgout.count = siop_htoc32(sc, msgoffset);
if (sc->targets[target]->status == TARST_ASYNC) {
*targ_flags &= TARF_DT; /* Save TARF_DT 'cuz we don't set it here */
quirks = xs->sc_link->quirks;
if ((quirks & SDEV_NOTAGS) == 0)
*targ_flags |= TARF_TAG;
if (((quirks & SDEV_NOWIDE) == 0) &&
(sc->features & SF_BUS_WIDE))
*targ_flags |= TARF_WIDE;
if ((quirks & SDEV_NOSYNC) == 0)
*targ_flags |= TARF_SYNC;
if ((sc->features & SF_CHIP_GEBUG) &&
(*targ_flags & TARF_WIDE) == 0)
/*
* 1010 workaround: can't do disconnect if not wide,
* so can't do tag
*/
*targ_flags &= ~TARF_TAG;
/* Safe to call siop_add_dev() multiple times */
siop_add_dev((struct siop_softc *)sc, target, lun);
if ((*targ_flags & TARF_DT) &&
(sc->mode == STEST4_MODE_LVD)) {
sc->targets[target]->status = TARST_PPR_NEG;
siop_ppr_msg(siop_cmd, msgoffset, sc->dt_minsync,
sc->maxoff);
} else if (*targ_flags & TARF_WIDE) {
sc->targets[target]->status = TARST_WIDE_NEG;
siop_wdtr_msg(siop_cmd, msgoffset,
MSG_EXT_WDTR_BUS_16_BIT);
} else if (*targ_flags & TARF_SYNC) {
sc->targets[target]->status = TARST_SYNC_NEG;
siop_sdtr_msg(siop_cmd, msgoffset, sc->st_minsync,
(sc->maxoff > 31) ? 31 : sc->maxoff);
} else {
sc->targets[target]->status = TARST_OK;
siop_update_xfer_mode(sc, target);
}
} else if (sc->targets[target]->status == TARST_OK &&
(*targ_flags & TARF_TAG) &&
siop_cmd->status != CMDST_SENSE) {
siop_cmd->flags |= CMDFL_TAG;
}
siop_cmd->siop_tables->status =
siop_htoc32(sc, SCSI_SIOP_NOSTATUS); /* set invalid status */
if ((xs->flags & (SCSI_DATA_IN | SCSI_DATA_OUT)) ||
siop_cmd->status == CMDST_SENSE) {
bzero(siop_cmd->siop_tables->data,
sizeof(siop_cmd->siop_tables->data));
for (i = 0; i < siop_cmd->dmamap_data->dm_nsegs; i++) {
siop_cmd->siop_tables->data[i].count =
siop_htoc32(sc,
siop_cmd->dmamap_data->dm_segs[i].ds_len);
siop_cmd->siop_tables->data[i].addr =
siop_htoc32(sc,
siop_cmd->dmamap_data->dm_segs[i].ds_addr);
}
}
}
int
siop_wdtr_neg(struct siop_common_cmd *siop_cmd)
{
struct siop_common_softc *sc = siop_cmd->siop_sc;
struct siop_common_target *siop_target = siop_cmd->siop_target;
int target = siop_cmd->xs->sc_link->target;
struct siop_common_xfer *tables = siop_cmd->siop_tables;
if (siop_target->status == TARST_WIDE_NEG) {
/* we initiated wide negotiation */
switch (tables->msg_in[3]) {
case MSG_EXT_WDTR_BUS_8_BIT:
siop_target->flags &= ~TARF_ISWIDE;
sc->targets[target]->id &= ~(SCNTL3_EWS << 24);
break;
case MSG_EXT_WDTR_BUS_16_BIT:
if (siop_target->flags & TARF_WIDE) {
siop_target->flags |= TARF_ISWIDE;
sc->targets[target]->id |= (SCNTL3_EWS << 24);
break;
}
/* FALLTHROUGH */
default:
/*
* hum, we got more than what we can handle, shouldn't
* happen. Reject, and stay async
*/
siop_target->flags &= ~TARF_ISWIDE;
siop_target->status = TARST_OK;
siop_target->offset = siop_target->period = 0;
siop_update_xfer_mode(sc, target);
printf("%s: rejecting invalid wide negotiation from "
"target %d (%d)\n", sc->sc_dev.dv_xname, target,
tables->msg_in[3]);
tables->t_msgout.count = siop_htoc32(sc, 1);
tables->msg_out[0] = MSG_MESSAGE_REJECT;
return SIOP_NEG_MSGOUT;
}
tables->id = siop_htoc32(sc, sc->targets[target]->id);
bus_space_write_1(sc->sc_rt, sc->sc_rh,
SIOP_SCNTL3,
(sc->targets[target]->id >> 24) & 0xff);
/* we now need to do sync */
if (siop_target->flags & TARF_SYNC) {
siop_target->status = TARST_SYNC_NEG;
siop_sdtr_msg(siop_cmd, 0, sc->st_minsync,
(sc->maxoff > 31) ? 31 : sc->maxoff);
return SIOP_NEG_MSGOUT;
} else {
siop_target->status = TARST_OK;
siop_update_xfer_mode(sc, target);
return SIOP_NEG_ACK;
}
} else {
/* target initiated wide negotiation */
if (tables->msg_in[3] >= MSG_EXT_WDTR_BUS_16_BIT
&& (siop_target->flags & TARF_WIDE)) {
siop_target->flags |= TARF_ISWIDE;
sc->targets[target]->id |= SCNTL3_EWS << 24;
} else {
siop_target->flags &= ~TARF_ISWIDE;
sc->targets[target]->id &= ~(SCNTL3_EWS << 24);
}
tables->id = siop_htoc32(sc, sc->targets[target]->id);
bus_space_write_1(sc->sc_rt, sc->sc_rh, SIOP_SCNTL3,
(sc->targets[target]->id >> 24) & 0xff);
/*
* we did reset wide parameters, so fall back to async,
* but don't schedule a sync neg, target should initiate it
*/
siop_target->status = TARST_OK;
siop_target->offset = siop_target->period = 0;
siop_update_xfer_mode(sc, target);
siop_wdtr_msg(siop_cmd, 0, (siop_target->flags & TARF_ISWIDE) ?
MSG_EXT_WDTR_BUS_16_BIT : MSG_EXT_WDTR_BUS_8_BIT);
return SIOP_NEG_MSGOUT;
}
}
int
siop_ppr_neg(struct siop_common_cmd *siop_cmd)
{
struct siop_common_softc *sc = siop_cmd->siop_sc;
struct siop_common_target *siop_target = siop_cmd->siop_target;
int target = siop_cmd->xs->sc_link->target;
struct siop_common_xfer *tables = siop_cmd->siop_tables;
int sync, offset, options, scf = 0;
int i;
#ifdef DEBUG_NEG
printf("%s: answer on ppr negotiation:", sc->sc_dev.dv_xname);
for (i = 0; i < 8; i++)
printf(" 0x%x", tables->msg_in[i]);
printf("\n");
#endif
if (siop_target->status == TARST_PPR_NEG) {
/* we initiated PPR negotiation */
sync = tables->msg_in[3];
offset = tables->msg_in[5];
options = tables->msg_in[7];
if (options != MSG_EXT_PPR_PROT_DT) {
/* shouldn't happen */
printf("%s: ppr negotiation for target %d: "
"no DT option\n", sc->sc_dev.dv_xname, target);
siop_target->status = TARST_ASYNC;
siop_target->flags &= ~(TARF_DT | TARF_ISDT);
siop_target->offset = 0;
siop_target->period = 0;
goto reject;
}
if (offset > sc->maxoff || sync < sc->dt_minsync ||
sync > sc->dt_maxsync) {
printf("%s: ppr negotiation for target %d: "
"offset (%d) or sync (%d) out of range\n",
sc->sc_dev.dv_xname, target, offset, sync);
/* should not happen */
siop_target->status = TARST_ASYNC;
siop_target->flags &= ~(TARF_DT | TARF_ISDT);
siop_target->offset = 0;
siop_target->period = 0;
goto reject;
} else {
for (i = 0; i <
sizeof(dt_scf_period) / sizeof(dt_scf_period[0]);
i++) {
if (sc->clock_period != dt_scf_period[i].clock)
continue;
if (dt_scf_period[i].period == sync) {
/* ok, found it. we now are sync. */
siop_target->offset = offset;
siop_target->period = sync;
scf = dt_scf_period[i].scf;
siop_target->flags |= TARF_ISDT;
}
}
if ((siop_target->flags & TARF_ISDT) == 0) {
printf("%s: ppr negotiation for target %d: "
"sync (%d) incompatible with adapter\n",
sc->sc_dev.dv_xname, target, sync);
/*
* we didn't find it in our table, do async
* send reject msg, start SDTR/WDTR neg
*/
siop_target->status = TARST_ASYNC;
siop_target->flags &= ~(TARF_DT | TARF_ISDT);
siop_target->offset = 0;
siop_target->period = 0;
goto reject;
}
}
if (tables->msg_in[6] != 1) {
printf("%s: ppr negotiation for target %d: "
"transfer width (%d) incompatible with dt\n",
sc->sc_dev.dv_xname, target, tables->msg_in[6]);
/* DT mode can only be done with wide transfers */
siop_target->status = TARST_ASYNC;
siop_target->flags &= ~(TARF_DT | TARF_ISDT);
siop_target->offset = 0;
siop_target->period = 0;
goto reject;
}
siop_target->flags |= TARF_ISWIDE;
sc->targets[target]->id |= (SCNTL3_EWS << 24);
sc->targets[target]->id &= ~(SCNTL3_SCF_MASK << 24);
sc->targets[target]->id |= scf << (24 + SCNTL3_SCF_SHIFT);
sc->targets[target]->id &= ~(SXFER_MO_MASK << 8);
sc->targets[target]->id |=
(siop_target->offset & SXFER_MO_MASK) << 8;
sc->targets[target]->id &= ~0xff;
sc->targets[target]->id |= SCNTL4_U3EN;
siop_target->status = TARST_OK;
siop_update_xfer_mode(sc, target);
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_SXFER,
(sc->targets[target]->id >> 8) & 0xff);
bus_space_write_1(sc->sc_rt, sc->sc_rh, SIOP_SCNTL4,
sc->targets[target]->id & 0xff);
return SIOP_NEG_ACK;
} else {
/* target initiated PPR negotiation, shouldn't happen */
printf("%s: rejecting invalid PPR negotiation from "
"target %d\n", sc->sc_dev.dv_xname, target);
reject:
tables->t_msgout.count = siop_htoc32(sc, 1);
tables->msg_out[0] = MSG_MESSAGE_REJECT;
return SIOP_NEG_MSGOUT;
}
}
int
siop_sdtr_neg(struct siop_common_cmd *siop_cmd)
{
struct siop_common_softc *sc = siop_cmd->siop_sc;
struct siop_common_target *siop_target = siop_cmd->siop_target;
int target = siop_cmd->xs->sc_link->target;
int sync, maxoffset, offset, i;
int send_msgout = 0;
struct siop_common_xfer *tables = siop_cmd->siop_tables;
/* limit to Ultra/2 parameters, need PPR for Ultra/3 */
maxoffset = (sc->maxoff > 31) ? 31 : sc->maxoff;
sync = tables->msg_in[3];
offset = tables->msg_in[4];
if (siop_target->status == TARST_SYNC_NEG) {
/* we initiated sync negotiation */
siop_target->status = TARST_OK;
#ifdef DEBUG
printf("sdtr: sync %d offset %d\n", sync, offset);
#endif
if (offset > maxoffset || sync < sc->st_minsync ||
sync > sc->st_maxsync)
goto reject;
for (i = 0; i < sizeof(scf_period) / sizeof(scf_period[0]);
i++) {
if (sc->clock_period != scf_period[i].clock)
continue;
if (scf_period[i].period == sync) {
/* ok, found it. we now are sync. */
siop_target->offset = offset;
siop_target->period = sync;
sc->targets[target]->id &=
~(SCNTL3_SCF_MASK << 24);
sc->targets[target]->id |= scf_period[i].scf
<< (24 + SCNTL3_SCF_SHIFT);
if (sync < 25 && /* Ultra */
(sc->features & SF_BUS_ULTRA3) == 0)
sc->targets[target]->id |=
SCNTL3_ULTRA << 24;
else
sc->targets[target]->id &=
~(SCNTL3_ULTRA << 24);
sc->targets[target]->id &=
~(SXFER_MO_MASK << 8);
sc->targets[target]->id |=
(offset & SXFER_MO_MASK) << 8;
sc->targets[target]->id &= ~0xff; /* scntl4 */
goto end;
}
}
/*
* we didn't find it in our table, do async and send reject
* msg
*/
reject:
send_msgout = 1;
tables->t_msgout.count = siop_htoc32(sc, 1);
tables->msg_out[0] = MSG_MESSAGE_REJECT;
sc->targets[target]->id &= ~(SCNTL3_SCF_MASK << 24);
sc->targets[target]->id &= ~(SCNTL3_ULTRA << 24);
sc->targets[target]->id &= ~(SXFER_MO_MASK << 8);
sc->targets[target]->id &= ~0xff; /* scntl4 */
siop_target->offset = siop_target->period = 0;
} else { /* target initiated sync neg */
#ifdef DEBUG
printf("sdtr (target): sync %d offset %d\n", sync, offset);
#endif
if (offset == 0 || sync > sc->st_maxsync) { /* async */
goto async;
}
if (offset > maxoffset)
offset = maxoffset;
if (sync < sc->st_minsync)
sync = sc->st_minsync;
/* look for sync period */
for (i = 0; i < sizeof(scf_period) / sizeof(scf_period[0]);
i++) {
if (sc->clock_period != scf_period[i].clock)
continue;
if (scf_period[i].period == sync) {
/* ok, found it. we now are sync. */
siop_target->offset = offset;
siop_target->period = sync;
sc->targets[target]->id &=
~(SCNTL3_SCF_MASK << 24);
sc->targets[target]->id |= scf_period[i].scf
<< (24 + SCNTL3_SCF_SHIFT);
if (sync < 25 && /* Ultra */
(sc->features & SF_BUS_ULTRA3) == 0)
sc->targets[target]->id |=
SCNTL3_ULTRA << 24;
else
sc->targets[target]->id &=
~(SCNTL3_ULTRA << 24);
sc->targets[target]->id &=
~(SXFER_MO_MASK << 8);
sc->targets[target]->id |=
(offset & SXFER_MO_MASK) << 8;
sc->targets[target]->id &= ~0xff; /* scntl4 */
siop_sdtr_msg(siop_cmd, 0, sync, offset);
send_msgout = 1;
goto end;
}
}
async:
siop_target->offset = siop_target->period = 0;
sc->targets[target]->id &= ~(SCNTL3_SCF_MASK << 24);
sc->targets[target]->id &= ~(SCNTL3_ULTRA << 24);
sc->targets[target]->id &= ~(SXFER_MO_MASK << 8);
sc->targets[target]->id &= ~0xff; /* scntl4 */
siop_sdtr_msg(siop_cmd, 0, 0, 0);
send_msgout = 1;
}
end:
if (siop_target->status == TARST_OK)
siop_update_xfer_mode(sc, target);
#ifdef DEBUG
printf("id now 0x%x\n", sc->targets[target]->id);
#endif
tables->id = siop_htoc32(sc, sc->targets[target]->id);
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_SXFER,
(sc->targets[target]->id >> 8) & 0xff);
if (send_msgout) {
return SIOP_NEG_MSGOUT;
} else {
return SIOP_NEG_ACK;
}
}
void
siop_sdtr_msg(struct siop_common_cmd *siop_cmd, int offset, int ssync, int soff)
{
siop_cmd->siop_tables->msg_out[offset + 0] = MSG_EXTENDED;
siop_cmd->siop_tables->msg_out[offset + 1] = MSG_EXT_SDTR_LEN;
siop_cmd->siop_tables->msg_out[offset + 2] = MSG_EXT_SDTR;
siop_cmd->siop_tables->msg_out[offset + 3] = ssync;
siop_cmd->siop_tables->msg_out[offset + 4] = soff;
siop_cmd->siop_tables->t_msgout.count =
siop_htoc32(siop_cmd->siop_sc, offset + MSG_EXT_SDTR_LEN + 2);
}
void
siop_wdtr_msg(struct siop_common_cmd *siop_cmd, int offset, int wide)
{
siop_cmd->siop_tables->msg_out[offset + 0] = MSG_EXTENDED;
siop_cmd->siop_tables->msg_out[offset + 1] = MSG_EXT_WDTR_LEN;
siop_cmd->siop_tables->msg_out[offset + 2] = MSG_EXT_WDTR;
siop_cmd->siop_tables->msg_out[offset + 3] = wide;
siop_cmd->siop_tables->t_msgout.count =
siop_htoc32(siop_cmd->siop_sc, offset + MSG_EXT_WDTR_LEN + 2);
}
void
siop_ppr_msg(struct siop_common_cmd *siop_cmd, int offset, int ssync, int soff)
{
siop_cmd->siop_tables->msg_out[offset + 0] = MSG_EXTENDED;
siop_cmd->siop_tables->msg_out[offset + 1] = MSG_EXT_PPR_LEN;
siop_cmd->siop_tables->msg_out[offset + 2] = MSG_EXT_PPR;
siop_cmd->siop_tables->msg_out[offset + 3] = ssync;
siop_cmd->siop_tables->msg_out[offset + 4] = 0; /* reserved */
siop_cmd->siop_tables->msg_out[offset + 5] = soff;
siop_cmd->siop_tables->msg_out[offset + 6] = 1; /* wide */
siop_cmd->siop_tables->msg_out[offset + 7] = MSG_EXT_PPR_PROT_DT;
siop_cmd->siop_tables->t_msgout.count =
siop_htoc32(siop_cmd->siop_sc, offset + MSG_EXT_PPR_LEN + 2);
}
void
siop_ma(struct siop_common_cmd *siop_cmd)
{
int offset, dbc, sstat;
struct siop_common_softc *sc = siop_cmd->siop_sc;
scr_table_t *table; /* table with partial xfer */
/*
* compute how much of the current table didn't get handled when
* a phase mismatch occurs
*/
if ((siop_cmd->xs->flags & (SCSI_DATA_OUT | SCSI_DATA_IN))
== 0)
return; /* no valid data transfer */
offset = bus_space_read_1(sc->sc_rt, sc->sc_rh, SIOP_SCRATCHA + 1);
if (offset >= SIOP_NSG) {
printf("%s: bad offset in siop_sdp (%d)\n",
sc->sc_dev.dv_xname, offset);
return;
}
table = &siop_cmd->siop_tables->data[offset];
#ifdef DEBUG_DR
printf("siop_ma: offset %d count=%d addr=0x%x ", offset,
table->count, table->addr);
#endif
dbc = bus_space_read_4(sc->sc_rt, sc->sc_rh, SIOP_DBC) & 0x00ffffff;
if (siop_cmd->xs->flags & SCSI_DATA_OUT) {
if (sc->features & SF_CHIP_DFBC) {
dbc +=
bus_space_read_2(sc->sc_rt, sc->sc_rh, SIOP_DFBC);
} else {
/* need to account stale data in FIFO */
int dfifo =
bus_space_read_1(sc->sc_rt, sc->sc_rh, SIOP_DFIFO);
if (sc->features & SF_CHIP_FIFO) {
dfifo |= (bus_space_read_1(sc->sc_rt, sc->sc_rh,
SIOP_CTEST5) & CTEST5_BOMASK) << 8;
dbc += (dfifo - (dbc & 0x3ff)) & 0x3ff;
} else {
dbc += (dfifo - (dbc & 0x7f)) & 0x7f;
}
}
sstat = bus_space_read_1(sc->sc_rt, sc->sc_rh, SIOP_SSTAT0);
if (sstat & SSTAT0_OLF)
dbc++;
if ((sstat & SSTAT0_ORF) && (sc->features & SF_CHIP_DFBC) == 0)
dbc++;
if (siop_cmd->siop_target->flags & TARF_ISWIDE) {
sstat = bus_space_read_1(sc->sc_rt, sc->sc_rh,
SIOP_SSTAT2);
if (sstat & SSTAT2_OLF1)
dbc++;
if ((sstat & SSTAT2_ORF1) &&
(sc->features & SF_CHIP_DFBC) == 0)
dbc++;
}
/* clear the FIFO */
bus_space_write_1(sc->sc_rt, sc->sc_rh, SIOP_CTEST3,
bus_space_read_1(sc->sc_rt, sc->sc_rh, SIOP_CTEST3) |
CTEST3_CLF);
}
siop_cmd->flags |= CMDFL_RESID;
siop_cmd->resid = dbc;
}
void
siop_sdp(struct siop_common_cmd *siop_cmd, int offset)
{
struct siop_common_softc *sc = siop_cmd->siop_sc;
scr_table_t *table;
if ((siop_cmd->xs->flags & (SCSI_DATA_OUT | SCSI_DATA_IN))== 0)
return; /* no data pointers to save */
/*
* offset == SIOP_NSG may be a valid condition if we get a Save data
* pointer when the xfer is done. Just ignore the Save data pointer
* in this case
*/
if (offset == SIOP_NSG)
return;
#ifdef DIAGNOSTIC
if (offset > SIOP_NSG) {
sc_print_addr(siop_cmd->xs->sc_link);
printf("offset %d > %d\n", offset, SIOP_NSG);
panic("siop_sdp: offset");
}
#endif
/*
* Save data pointer. We do this by adjusting the tables to point
* at the beginning of the data not yet transferred.
* offset points to the first table with untransferred data.
*/
/*
* before doing that we decrease resid from the amount of data which
* has been transferred.
*/
siop_update_resid(siop_cmd, offset);
/*
* First let see if we have a resid from a phase mismatch. If so,
* we have to adjst the table at offset to remove transferred data.
*/
if (siop_cmd->flags & CMDFL_RESID) {
siop_cmd->flags &= ~CMDFL_RESID;
table = &siop_cmd->siop_tables->data[offset];
/* "cut" already transferred data from this table */
table->addr =
siop_htoc32(sc, siop_ctoh32(sc, table->addr) +
siop_ctoh32(sc, table->count) - siop_cmd->resid);
table->count = siop_htoc32(sc, siop_cmd->resid);
}
/*
* now we can remove entries which have been transferred.
* We just move the entries with data left at the beginning of the
* tables
*/
bcopy(&siop_cmd->siop_tables->data[offset],
&siop_cmd->siop_tables->data[0],
(SIOP_NSG - offset) * sizeof(scr_table_t));
}
void
siop_update_resid(struct siop_common_cmd *siop_cmd, int offset)
{
struct siop_common_softc *sc = siop_cmd->siop_sc;
scr_table_t *table;
int i;
if ((siop_cmd->xs->flags & (SCSI_DATA_OUT | SCSI_DATA_IN))
== 0)
return; /* no data to transfer */
/*
* update resid. First account for the table entries which have
* been fully completed.
*/
for (i = 0; i < offset; i++)
siop_cmd->xs->resid -=
siop_ctoh32(sc, siop_cmd->siop_tables->data[i].count);
/*
* if CMDFL_RESID is set, the last table (pointed by offset) is a
* partial transfers. If not, offset points to the entry following
* the last full transfer.
*/
if (siop_cmd->flags & CMDFL_RESID) {
table = &siop_cmd->siop_tables->data[offset];
siop_cmd->xs->resid -=
siop_ctoh32(sc, table->count) - siop_cmd->resid;
}
}
int
siop_iwr(struct siop_common_cmd *siop_cmd)
{
int offset;
scr_table_t *table; /* table with IWR */
struct siop_common_softc *sc = siop_cmd->siop_sc;
/* handle ignore wide residue messages */
/* if target isn't wide, reject */
if ((siop_cmd->siop_target->flags & TARF_ISWIDE) == 0) {
siop_cmd->siop_tables->t_msgout.count = siop_htoc32(sc, 1);
siop_cmd->siop_tables->msg_out[0] = MSG_MESSAGE_REJECT;
return SIOP_NEG_MSGOUT;
}
/* get index of current command in table */
offset = bus_space_read_1(sc->sc_rt, sc->sc_rh, SIOP_SCRATCHA + 1);
/*
* if the current table did complete, we're now pointing at the
* next one. Go back one if we didn't see a phase mismatch.
*/
if ((siop_cmd->flags & CMDFL_RESID) == 0)
offset--;
table = &siop_cmd->siop_tables->data[offset];
if ((siop_cmd->flags & CMDFL_RESID) == 0) {
if (siop_ctoh32(sc, table->count) & 1) {
/* we really got the number of bytes we expected */
return SIOP_NEG_ACK;
} else {
/*
* now we really had a short xfer, by one byte.
* handle it just as if we had a phase mismatch
* (there is a resid of one for this table).
* Update scratcha1 to reflect the fact that
* this xfer isn't complete.
*/
siop_cmd->flags |= CMDFL_RESID;
siop_cmd->resid = 1;
bus_space_write_1(sc->sc_rt, sc->sc_rh,
SIOP_SCRATCHA + 1, offset);
return SIOP_NEG_ACK;
}
} else {
/*
* we already have a short xfer for this table; it's
* just one byte less than we though it was
*/
siop_cmd->resid--;
return SIOP_NEG_ACK;
}
}
void
siop_clearfifo(struct siop_common_softc *sc)
{
int timeout = 0;
int ctest3 = bus_space_read_1(sc->sc_rt, sc->sc_rh, SIOP_CTEST3);
#ifdef DEBUG_INTR
printf("DMA fifo not empty !\n");
#endif
bus_space_write_1(sc->sc_rt, sc->sc_rh, SIOP_CTEST3,
ctest3 | CTEST3_CLF);
while ((bus_space_read_1(sc->sc_rt, sc->sc_rh, SIOP_CTEST3) &
CTEST3_CLF) != 0) {
delay(1);
if (++timeout > 1000) {
printf("clear fifo failed\n");
bus_space_write_1(sc->sc_rt, sc->sc_rh, SIOP_CTEST3,
bus_space_read_1(sc->sc_rt, sc->sc_rh,
SIOP_CTEST3) & ~CTEST3_CLF);
return;
}
}
}
int
siop_modechange(struct siop_common_softc *sc)
{
int retry;
int sist0, sist1, stest2;
for (retry = 0; retry < 5; retry++) {
/*
* datasheet says to wait 100ms and re-read SIST1,
* to check that DIFFSENSE is stable.
* We may delay() 5 times for 100ms at interrupt time;
* hopefully this will not happen often.
*/
delay(100000);
sist0 = bus_space_read_1(sc->sc_rt, sc->sc_rh, SIOP_SIST0);
sist1 = bus_space_read_1(sc->sc_rt, sc->sc_rh, SIOP_SIST1);
if (sist1 & SIEN1_SBMC)
continue; /* we got an irq again */
sc->mode = bus_space_read_1(sc->sc_rt, sc->sc_rh, SIOP_STEST4) &
STEST4_MODE_MASK;
stest2 = bus_space_read_1(sc->sc_rt, sc->sc_rh, SIOP_STEST2);
switch(sc->mode) {
case STEST4_MODE_DIF:
printf("%s: switching to differential mode\n",
sc->sc_dev.dv_xname);
bus_space_write_1(sc->sc_rt, sc->sc_rh, SIOP_STEST2,
stest2 | STEST2_DIF);
break;
case STEST4_MODE_SE:
printf("%s: switching to single-ended mode\n",
sc->sc_dev.dv_xname);
bus_space_write_1(sc->sc_rt, sc->sc_rh, SIOP_STEST2,
stest2 & ~STEST2_DIF);
break;
case STEST4_MODE_LVD:
printf("%s: switching to LVD mode\n",
sc->sc_dev.dv_xname);
bus_space_write_1(sc->sc_rt, sc->sc_rh, SIOP_STEST2,
stest2 & ~STEST2_DIF);
break;
default:
printf("%s: invalid SCSI mode 0x%x\n",
sc->sc_dev.dv_xname, sc->mode);
return 0;
}
return 1;
}
printf("%s: timeout waiting for DIFFSENSE to stabilise\n",
sc->sc_dev.dv_xname);
return 0;
}
void
siop_resetbus(struct siop_common_softc *sc)
{
int scntl1;
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);
}
void
siop_update_xfer_mode(struct siop_common_softc *sc, int target)
{
struct siop_common_target *siop_target;
siop_target = sc->targets[target];
printf("%s: target %d now using %s%s%d bit ",
sc->sc_dev.dv_xname, target,
(siop_target->flags & TARF_TAG) ? "tagged " : "",
(siop_target->flags & TARF_ISDT) ? "DT " : "",
(siop_target->flags & TARF_ISWIDE) ? 16 : 8);
if (siop_target->offset == 0)
printf("async ");
else {
switch (siop_target->period) {
case 9: /* 12.5ns cycle */
printf("80.0");
break;
case 10: /* 25 ns cycle */
printf("40.0");
break;
case 12: /* 48 ns cycle */
printf("20.0");
break;
case 18: /* 72 ns cycle */
printf("13.3");
break;
case 25: /* 100 ns cycle */
printf("10.0");
break;
case 37: /* 118 ns cycle */
printf("6.67");
break;
case 50: /* 200 ns cycle */
printf("5.0");
break;
case 75: /* 300 ns cycle */
printf("3.33");
break;
default:
printf("??");
break;
}
printf(" MHz %d REQ/ACK offset ", siop_target->offset);
}
printf("xfers\n");
if ((sc->features & SF_CHIP_GEBUG) &&
(siop_target->flags & TARF_ISWIDE) == 0)
/* 1010 workaround: can't do disconnect if not wide, so can't do tag */
siop_target->flags &= ~TARF_TAG;
}
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