FreeBSD-5.3/sys/dev/aic/aic.c
/*-
* Copyright (c) 1999 Luoqi Chen.
* All rights reserved.
*
* 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 AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/sys/dev/aic/aic.c,v 1.22 2003/08/24 17:48:02 obrien Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/bus.h>
#include <machine/bus_pio.h>
#include <machine/bus.h>
#include <cam/cam.h>
#include <cam/cam_ccb.h>
#include <cam/cam_sim.h>
#include <cam/cam_xpt_sim.h>
#include <cam/cam_debug.h>
#include <cam/scsi/scsi_message.h>
#include <dev/aic/aic6360reg.h>
#include <dev/aic/aicvar.h>
static void aic_action(struct cam_sim *sim, union ccb *ccb);
static void aic_execute_scb(void *arg, bus_dma_segment_t *dm_segs,
int nseg, int error);
static void aic_start(struct aic_softc *aic);
static void aic_select(struct aic_softc *aic);
static void aic_selected(struct aic_softc *aic);
static void aic_reselected(struct aic_softc *aic);
static void aic_reconnect(struct aic_softc *aic, int tag);
static void aic_cmd(struct aic_softc *aic);
static void aic_msgin(struct aic_softc *aic);
static void aic_handle_msgin(struct aic_softc *aic);
static void aic_msgout(struct aic_softc *aic);
static void aic_datain(struct aic_softc *aic);
static void aic_dataout(struct aic_softc *aic);
static void aic_done(struct aic_softc *aic, struct aic_scb *scb);
static void aic_poll(struct cam_sim *sim);
static void aic_timeout(void *arg);
static void aic_scsi_reset(struct aic_softc *aic);
static void aic_chip_reset(struct aic_softc *aic);
static void aic_reset(struct aic_softc *aic, int initiate_reset);
devclass_t aic_devclass;
static struct aic_scb *free_scbs;
static struct aic_scb *
aic_get_scb(struct aic_softc *aic)
{
struct aic_scb *scb;
int s = splcam();
if ((scb = free_scbs) != NULL)
free_scbs = (struct aic_scb *)free_scbs->ccb;
splx(s);
return (scb);
}
static void
aic_free_scb(struct aic_softc *aic, struct aic_scb *scb)
{
int s = splcam();
if ((aic->flags & AIC_RESOURCE_SHORTAGE) != 0 &&
(scb->ccb->ccb_h.status & CAM_RELEASE_SIMQ) == 0) {
scb->ccb->ccb_h.status |= CAM_RELEASE_SIMQ;
aic->flags &= ~AIC_RESOURCE_SHORTAGE;
}
scb->flags = 0;
scb->ccb = (union ccb *)free_scbs;
free_scbs = scb;
splx(s);
}
static void
aic_action(struct cam_sim *sim, union ccb *ccb)
{
struct aic_softc *aic;
int s;
CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE, ("aic_action\n"));
aic = (struct aic_softc *)cam_sim_softc(sim);
switch (ccb->ccb_h.func_code) {
case XPT_SCSI_IO: /* Execute the requested I/O operation */
case XPT_RESET_DEV: /* Bus Device Reset the specified SCSI device */
{
struct aic_scb *scb;
if ((scb = aic_get_scb(aic)) == NULL) {
s = splcam();
aic->flags |= AIC_RESOURCE_SHORTAGE;
splx(s);
xpt_freeze_simq(aic->sim, /*count*/1);
ccb->ccb_h.status = CAM_REQUEUE_REQ;
xpt_done(ccb);
return;
}
scb->ccb = ccb;
ccb->ccb_h.ccb_scb_ptr = scb;
ccb->ccb_h.ccb_aic_ptr = aic;
scb->target = ccb->ccb_h.target_id;
scb->lun = ccb->ccb_h.target_lun;
if (ccb->ccb_h.func_code == XPT_SCSI_IO) {
scb->cmd_len = ccb->csio.cdb_len;
if (ccb->ccb_h.flags & CAM_CDB_POINTER) {
if (ccb->ccb_h.flags & CAM_CDB_PHYS) {
ccb->ccb_h.status = CAM_REQ_INVALID;
aic_free_scb(aic, scb);
xpt_done(ccb);
return;
}
scb->cmd_ptr = ccb->csio.cdb_io.cdb_ptr;
} else {
scb->cmd_ptr = ccb->csio.cdb_io.cdb_bytes;
}
if ((ccb->ccb_h.flags & CAM_DIR_MASK) != CAM_DIR_NONE) {
if ((ccb->ccb_h.flags & CAM_SCATTER_VALID) ||
(ccb->ccb_h.flags & CAM_DATA_PHYS)) {
ccb->ccb_h.status = CAM_REQ_INVALID;
aic_free_scb(aic, scb);
xpt_done(ccb);
return;
}
scb->data_ptr = ccb->csio.data_ptr;
scb->data_len = ccb->csio.dxfer_len;
} else {
scb->data_ptr = NULL;
scb->data_len = 0;
}
aic_execute_scb(scb, NULL, 0, 0);
} else {
scb->flags |= SCB_DEVICE_RESET;
aic_execute_scb(scb, NULL, 0, 0);
}
break;
}
case XPT_SET_TRAN_SETTINGS:
{
struct ccb_trans_settings *cts;
struct aic_tinfo *ti;
cts = &ccb->cts;
ti = &aic->tinfo[ccb->ccb_h.target_id];
s = splcam();
if ((cts->valid & CCB_TRANS_DISC_VALID) != 0 &&
(aic->flags & AIC_DISC_ENABLE) != 0) {
if ((cts->flags & CCB_TRANS_DISC_ENB) != 0)
ti->flags |= TINFO_DISC_ENB;
else
ti->flags &= ~TINFO_DISC_ENB;
}
if ((cts->valid & CCB_TRANS_TQ_VALID) != 0) {
if ((cts->flags & CCB_TRANS_TAG_ENB) != 0)
ti->flags |= TINFO_TAG_ENB;
else
ti->flags &= ~TINFO_TAG_ENB;
}
if ((cts->valid & CCB_TRANS_SYNC_RATE_VALID) != 0) {
ti->goal.period = cts->sync_period;
if (ti->goal.period > aic->min_period) {
ti->goal.period = 0;
ti->goal.offset = 0;
} else if (ti->goal.period < aic->max_period)
ti->goal.period = aic->max_period;
}
if ((cts->valid & CCB_TRANS_SYNC_OFFSET_VALID) != 0) {
ti->goal.offset = cts->sync_offset;
if (ti->goal.offset == 0)
ti->goal.period = 0;
else if (ti->goal.offset > AIC_SYNC_OFFSET)
ti->goal.offset = AIC_SYNC_OFFSET;
}
if ((ti->goal.period != ti->current.period)
|| (ti->goal.offset != ti->current.offset))
ti->flags |= TINFO_SDTR_NEGO;
splx(s);
ccb->ccb_h.status = CAM_REQ_CMP;
xpt_done(ccb);
break;
}
case XPT_GET_TRAN_SETTINGS:
{
struct ccb_trans_settings *cts;
struct aic_tinfo *ti;
cts = &ccb->cts;
ti = &aic->tinfo[ccb->ccb_h.target_id];
s = splcam();
cts->flags &= ~(CCB_TRANS_DISC_ENB|CCB_TRANS_TAG_ENB);
if ((ti->flags & TINFO_DISC_ENB) != 0)
cts->flags |= CCB_TRANS_DISC_ENB;
if ((ti->flags & TINFO_TAG_ENB) != 0)
cts->flags |= CCB_TRANS_TAG_ENB;
if ((cts->flags & CCB_TRANS_CURRENT_SETTINGS) != 0) {
cts->sync_period = ti->current.period;
cts->sync_offset = ti->current.offset;
} else {
cts->sync_period = ti->user.period;
cts->sync_offset = ti->user.offset;
}
cts->bus_width = MSG_EXT_WDTR_BUS_8_BIT;
splx(s);
cts->valid = CCB_TRANS_SYNC_RATE_VALID
| CCB_TRANS_SYNC_OFFSET_VALID
| CCB_TRANS_BUS_WIDTH_VALID
| CCB_TRANS_DISC_VALID
| CCB_TRANS_TQ_VALID;
ccb->ccb_h.status = CAM_REQ_CMP;
xpt_done(ccb);
break;
}
case XPT_CALC_GEOMETRY:
{
cam_calc_geometry(&ccb->ccg, /*extended*/1);
xpt_done(ccb);
break;
}
case XPT_RESET_BUS: /* Reset the specified SCSI bus */
aic_reset(aic, /*initiate_reset*/TRUE);
ccb->ccb_h.status = CAM_REQ_CMP;
xpt_done(ccb);
break;
case XPT_PATH_INQ: /* Path routing inquiry */
{
struct ccb_pathinq *cpi = &ccb->cpi;
cpi->version_num = 1; /* XXX??? */
cpi->hba_inquiry = PI_SDTR_ABLE | PI_TAG_ABLE;
cpi->target_sprt = 0;
cpi->hba_misc = 0;
cpi->hba_eng_cnt = 0;
cpi->max_target = 7;
cpi->max_lun = 7;
cpi->initiator_id = aic->initiator;
cpi->bus_id = cam_sim_bus(sim);
cpi->base_transfer_speed = 3300;
strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
strncpy(cpi->hba_vid, "Adaptec", HBA_IDLEN);
strncpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN);
cpi->unit_number = cam_sim_unit(sim);
cpi->ccb_h.status = CAM_REQ_CMP;
xpt_done(ccb);
break;
}
default:
ccb->ccb_h.status = CAM_REQ_INVALID;
xpt_done(ccb);
break;
}
}
static void
aic_execute_scb(void *arg, bus_dma_segment_t *dm_segs, int nseg, int error)
{
struct aic_scb *scb = (struct aic_scb *)arg;
union ccb *ccb = scb->ccb;
struct aic_softc *aic = (struct aic_softc *)ccb->ccb_h.ccb_aic_ptr;
int s;
s = splcam();
if (ccb->ccb_h.status != CAM_REQ_INPROG) {
splx(s);
aic_free_scb(aic, scb);
xpt_done(ccb);
return;
}
scb->flags |= SCB_ACTIVE;
ccb->ccb_h.status |= CAM_SIM_QUEUED;
TAILQ_INSERT_TAIL(&aic->pending_ccbs, &ccb->ccb_h, sim_links.tqe);
ccb->ccb_h.timeout_ch = timeout(aic_timeout, (caddr_t)scb,
(ccb->ccb_h.timeout * hz) / 1000);
aic_start(aic);
splx(s);
}
/*
* Start another command if the controller is not busy.
*/
static void
aic_start(struct aic_softc *aic)
{
struct ccb_hdr *ccb_h;
struct aic_tinfo *ti;
if (aic->state != AIC_IDLE)
return;
TAILQ_FOREACH(ccb_h, &aic->pending_ccbs, sim_links.tqe) {
ti = &aic->tinfo[ccb_h->target_id];
if ((ti->lubusy & (1 << ccb_h->target_lun)) == 0) {
TAILQ_REMOVE(&aic->pending_ccbs, ccb_h, sim_links.tqe);
aic->nexus = (struct aic_scb *)ccb_h->ccb_scb_ptr;
aic_select(aic);
return;
}
}
CAM_DEBUG_PRINT(CAM_DEBUG_TRACE, ("aic_start: idle\n"));
aic_outb(aic, SIMODE0, ENSELDI);
aic_outb(aic, SIMODE1, ENSCSIRST);
aic_outb(aic, SCSISEQ, ENRESELI);
}
/*
* Start a selection.
*/
static void
aic_select(struct aic_softc *aic)
{
struct aic_scb *scb = aic->nexus;
CAM_DEBUG(scb->ccb->ccb_h.path, CAM_DEBUG_TRACE,
("aic_select - ccb %p\n", scb->ccb));
aic->state = AIC_SELECTING;
aic_outb(aic, DMACNTRL1, 0);
aic_outb(aic, SCSIID, aic->initiator << OID_S | scb->target);
aic_outb(aic, SXFRCTL1, STIMO_256ms | ENSTIMER |
(aic->flags & AIC_PARITY_ENABLE ? ENSPCHK : 0));
aic_outb(aic, SIMODE0, ENSELDI|ENSELDO);
aic_outb(aic, SIMODE1, ENSCSIRST|ENSELTIMO);
aic_outb(aic, SCSISEQ, ENRESELI|ENSELO|ENAUTOATNO);
}
/*
* We have successfully selected a target, prepare for the information
* transfer phases.
*/
static void
aic_selected(struct aic_softc *aic)
{
struct aic_scb *scb = aic->nexus;
union ccb *ccb = scb->ccb;
struct aic_tinfo *ti = &aic->tinfo[scb->target];
CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE,
("aic_selected - ccb %p\n", ccb));
aic->state = AIC_HASNEXUS;
if (scb->flags & SCB_DEVICE_RESET) {
aic->msg_buf[0] = MSG_BUS_DEV_RESET;
aic->msg_len = 1;
aic->msg_outq = AIC_MSG_MSGBUF;
} else {
aic->msg_outq = AIC_MSG_IDENTIFY;
if ((ti->flags & TINFO_TAG_ENB) != 0 &&
(ccb->ccb_h.flags & CAM_TAG_ACTION_VALID) != 0)
aic->msg_outq |= AIC_MSG_TAG_Q;
else
ti->lubusy |= 1 << scb->lun;
if ((ti->flags & TINFO_SDTR_NEGO) != 0)
aic->msg_outq |= AIC_MSG_SDTR;
}
aic_outb(aic, CLRSINT0, CLRSELDO);
aic_outb(aic, CLRSINT1, CLRBUSFREE);
aic_outb(aic, SCSISEQ, ENAUTOATNP);
aic_outb(aic, SIMODE0, 0);
aic_outb(aic, SIMODE1, ENSCSIRST|ENBUSFREE|ENREQINIT);
aic_outb(aic, SCSIRATE, ti->scsirate);
}
/*
* We are re-selected by a target, save the target id and wait for the
* target to further identify itself.
*/
static void
aic_reselected(struct aic_softc *aic)
{
u_int8_t selid;
CAM_DEBUG_PRINT(CAM_DEBUG_TRACE, ("aic_reselected\n"));
/*
* If we have started a selection, it must have lost out in
* the arbitration, put the command back to the pending queue.
*/
if (aic->nexus) {
TAILQ_INSERT_HEAD(&aic->pending_ccbs,
&aic->nexus->ccb->ccb_h, sim_links.tqe);
aic->nexus = NULL;
}
selid = aic_inb(aic, SELID) & ~(1 << aic->initiator);
if (selid & (selid - 1)) {
/* this should never have happened */
printf("aic_reselected: invalid selid %x\n", selid);
aic_reset(aic, /*initiate_reset*/TRUE);
return;
}
aic->state = AIC_RESELECTED;
aic->target = ffs(selid) - 1;
aic->lun = -1;
aic_outb(aic, CLRSINT0, CLRSELDI);
aic_outb(aic, CLRSINT1, CLRBUSFREE);
aic_outb(aic, SIMODE0, 0);
aic_outb(aic, SIMODE1, ENSCSIRST|ENBUSFREE|ENREQINIT);
aic_outb(aic, SCSISEQ, ENAUTOATNP);
aic_outb(aic, SCSIRATE, aic->tinfo[aic->target].scsirate);
}
/*
* Raise ATNO to signal the target that we have a message for it.
*/
static __inline void
aic_sched_msgout(struct aic_softc *aic, u_int8_t msg)
{
if (msg) {
aic->msg_buf[0] = msg;
aic->msg_len = 1;
}
aic->msg_outq |= AIC_MSG_MSGBUF;
aic_outb(aic, SCSISIGO, aic_inb(aic, SCSISIGI) | ATNO);
}
/*
* Wait for SPIORDY (SCSI PIO ready) flag, or a phase change.
*/
static __inline int
aic_spiordy(struct aic_softc *aic)
{
while (!(aic_inb(aic, DMASTAT) & INTSTAT) &&
!(aic_inb(aic, SSTAT0) & SPIORDY))
;
return !(aic_inb(aic, DMASTAT) & INTSTAT);
}
/*
* Reestablish a disconnected nexus.
*/
static void
aic_reconnect(struct aic_softc *aic, int tag)
{
struct aic_scb *scb;
struct ccb_hdr *ccb_h;
CAM_DEBUG_PRINT(CAM_DEBUG_TRACE, ("aic_reconnect\n"));
/* Find the nexus */
scb = NULL;
TAILQ_FOREACH(ccb_h, &aic->nexus_ccbs, sim_links.tqe) {
scb = (struct aic_scb *)ccb_h->ccb_scb_ptr;
if (scb->target == aic->target && scb->lun == aic->lun &&
(tag == -1 || scb->tag == tag))
break;
}
/* ABORT if nothing is found */
if (!ccb_h) {
if (tag == -1)
aic_sched_msgout(aic, MSG_ABORT);
else
aic_sched_msgout(aic, MSG_ABORT_TAG);
xpt_async(AC_UNSOL_RESEL, aic->path, NULL);
return;
}
/* Reestablish the nexus */
TAILQ_REMOVE(&aic->nexus_ccbs, ccb_h, sim_links.tqe);
aic->nexus = scb;
scb->flags &= ~SCB_DISCONNECTED;
aic->state = AIC_HASNEXUS;
}
/*
* Read messages.
*/
static void
aic_msgin(struct aic_softc *aic)
{
int msglen;
CAM_DEBUG_PRINT(CAM_DEBUG_TRACE, ("aic_msgin\n"));
aic_outb(aic, SIMODE1, ENSCSIRST|ENPHASEMIS|ENBUSFREE);
aic_outb(aic, SXFRCTL0, CHEN|SPIOEN);
aic->flags &= ~AIC_DROP_MSGIN;
aic->msg_len = 0;
do {
/*
* If a parity error is detected, drop the remaining
* bytes and inform the target so it could resend
* the messages.
*/
if (aic_inb(aic, SSTAT1) & SCSIPERR) {
aic_outb(aic, CLRSINT1, CLRSCSIPERR);
aic->flags |= AIC_DROP_MSGIN;
aic_sched_msgout(aic, MSG_PARITY_ERROR);
}
if ((aic->flags & AIC_DROP_MSGIN)) {
aic_inb(aic, SCSIDAT);
continue;
}
/* read the message byte without ACKing on it */
aic->msg_buf[aic->msg_len++] = aic_inb(aic, SCSIBUS);
if (aic->msg_buf[0] == MSG_EXTENDED) {
if (aic->msg_len < 2) {
(void) aic_inb(aic, SCSIDAT);
continue;
}
switch (aic->msg_buf[2]) {
case MSG_EXT_SDTR:
msglen = MSG_EXT_SDTR_LEN;
break;
case MSG_EXT_WDTR:
msglen = MSG_EXT_WDTR_LEN;
break;
default:
msglen = 0;
break;
}
if (aic->msg_buf[1] != msglen) {
aic->flags |= AIC_DROP_MSGIN;
aic_sched_msgout(aic, MSG_MESSAGE_REJECT);
}
msglen += 2;
} else if (aic->msg_buf[0] >= 0x20 && aic->msg_buf[0] <= 0x2f)
msglen = 2;
else
msglen = 1;
/*
* If we have a complete message, handle it before the final
* ACK (in case we decide to reject the message).
*/
if (aic->msg_len == msglen) {
aic_handle_msgin(aic);
aic->msg_len = 0;
}
/* ACK on the message byte */
(void) aic_inb(aic, SCSIDAT);
} while (aic_spiordy(aic));
aic_outb(aic, SXFRCTL0, CHEN);
aic_outb(aic, SIMODE1, ENSCSIRST|ENBUSFREE|ENREQINIT);
}
/*
* Handle a message.
*/
static void
aic_handle_msgin(struct aic_softc *aic)
{
struct aic_scb *scb;
struct ccb_hdr *ccb_h;
struct aic_tinfo *ti;
struct ccb_trans_settings neg;
if (aic->state == AIC_RESELECTED) {
if (!MSG_ISIDENTIFY(aic->msg_buf[0])) {
aic_sched_msgout(aic, MSG_MESSAGE_REJECT);
return;
}
aic->lun = aic->msg_buf[0] & MSG_IDENTIFY_LUNMASK;
if (aic->tinfo[aic->target].lubusy & (1 << aic->lun))
aic_reconnect(aic, -1);
else
aic->state = AIC_RECONNECTING;
return;
}
if (aic->state == AIC_RECONNECTING) {
if (aic->msg_buf[0] != MSG_SIMPLE_Q_TAG) {
aic_sched_msgout(aic, MSG_MESSAGE_REJECT);
return;
}
aic_reconnect(aic, aic->msg_buf[1]);
return;
}
switch (aic->msg_buf[0]) {
case MSG_CMDCOMPLETE: {
struct ccb_scsiio *csio;
scb = aic->nexus;
ccb_h = &scb->ccb->ccb_h;
csio = &scb->ccb->csio;
if ((scb->flags & SCB_SENSE) != 0) {
/* auto REQUEST SENSE command */
scb->flags &= ~SCB_SENSE;
csio->sense_resid = scb->data_len;
if (scb->status == SCSI_STATUS_OK) {
ccb_h->status |=
CAM_SCSI_STATUS_ERROR|CAM_AUTOSNS_VALID;
/*scsi_sense_print(csio);*/
} else {
ccb_h->status |= CAM_AUTOSENSE_FAIL;
printf("ccb %p sense failed %x\n",
ccb_h, scb->status);
}
} else {
csio->scsi_status = scb->status;
csio->resid = scb->data_len;
if (scb->status == SCSI_STATUS_OK) {
/* everything goes well */
ccb_h->status |= CAM_REQ_CMP;
} else if ((ccb_h->flags & CAM_DIS_AUTOSENSE) == 0 &&
(csio->scsi_status == SCSI_STATUS_CHECK_COND ||
csio->scsi_status == SCSI_STATUS_CMD_TERMINATED)) {
/* try to retrieve sense information */
scb->flags |= SCB_SENSE;
aic->flags |= AIC_BUSFREE_OK;
return;
} else
ccb_h->status |= CAM_SCSI_STATUS_ERROR;
}
aic_done(aic, scb);
aic->flags |= AIC_BUSFREE_OK;
break;
}
case MSG_EXTENDED:
switch (aic->msg_buf[2]) {
case MSG_EXT_SDTR:
scb = aic->nexus;
ti = &aic->tinfo[scb->target];
if (ti->flags & TINFO_SDTR_SENT) {
ti->current.period = aic->msg_buf[3];
ti->current.offset = aic->msg_buf[4];
} else {
ti->current.period = aic->msg_buf[3] =
max(ti->goal.period, aic->msg_buf[3]);
ti->current.offset = aic->msg_buf[4] =
min(ti->goal.offset, aic->msg_buf[4]);
/*
* The target initiated the negotiation,
* send back a response.
*/
aic_sched_msgout(aic, 0);
}
ti->flags &= ~(TINFO_SDTR_SENT|TINFO_SDTR_NEGO);
ti->scsirate = ti->current.offset ? ti->current.offset |
((ti->current.period * 4 + 49) / 50 - 2) << 4 : 0;
aic_outb(aic, SCSIRATE, ti->scsirate);
neg.sync_period = ti->goal.period = ti->current.period;
neg.sync_offset = ti->goal.offset = ti->current.offset;
neg.valid = CCB_TRANS_SYNC_RATE_VALID
| CCB_TRANS_SYNC_OFFSET_VALID;
ccb_h = &scb->ccb->ccb_h;
xpt_setup_ccb(&neg.ccb_h, ccb_h->path, 1);
xpt_async(AC_TRANSFER_NEG, ccb_h->path, &neg);
break;
case MSG_EXT_WDTR:
default:
aic_sched_msgout(aic, MSG_MESSAGE_REJECT);
break;
}
break;
case MSG_DISCONNECT:
scb = aic->nexus;
ccb_h = &scb->ccb->ccb_h;
TAILQ_INSERT_TAIL(&aic->nexus_ccbs, ccb_h, sim_links.tqe);
scb->flags |= SCB_DISCONNECTED;
aic->flags |= AIC_BUSFREE_OK;
aic->nexus = NULL;
CAM_DEBUG(ccb_h->path, CAM_DEBUG_TRACE, ("disconnected\n"));
break;
case MSG_MESSAGE_REJECT:
switch (aic->msg_outq & -aic->msg_outq) {
case AIC_MSG_TAG_Q:
scb = aic->nexus;
ti = &aic->tinfo[scb->target];
ti->flags &= ~TINFO_TAG_ENB;
ti->lubusy |= 1 << scb->lun;
break;
case AIC_MSG_SDTR:
scb = aic->nexus;
ti = &aic->tinfo[scb->target];
ti->current.period = ti->goal.period = 0;
ti->current.offset = ti->goal.offset = 0;
ti->flags &= ~(TINFO_SDTR_SENT|TINFO_SDTR_NEGO);
ti->scsirate = 0;
aic_outb(aic, SCSIRATE, ti->scsirate);
neg.sync_period = ti->current.period;
neg.sync_offset = ti->current.offset;
neg.valid = CCB_TRANS_SYNC_RATE_VALID
| CCB_TRANS_SYNC_OFFSET_VALID;
ccb_h = &scb->ccb->ccb_h;
xpt_setup_ccb(&neg.ccb_h, ccb_h->path, 1);
xpt_async(AC_TRANSFER_NEG, ccb_h->path, &neg);
break;
default:
break;
}
break;
case MSG_SAVEDATAPOINTER:
break;
case MSG_RESTOREPOINTERS:
break;
case MSG_NOOP:
break;
default:
aic_sched_msgout(aic, MSG_MESSAGE_REJECT);
break;
}
}
/*
* Send messages.
*/
static void
aic_msgout(struct aic_softc *aic)
{
struct aic_scb *scb;
union ccb *ccb;
struct aic_tinfo *ti;
int msgidx = 0;
CAM_DEBUG_PRINT(CAM_DEBUG_TRACE, ("aic_msgout\n"));
aic_outb(aic, SIMODE1, ENSCSIRST|ENPHASEMIS|ENBUSFREE);
aic_outb(aic, SXFRCTL0, CHEN|SPIOEN);
/*
* If the previous phase is also the message out phase,
* we need to retransmit all the messages, probably
* because the target has detected a parity error during
* the past transmission.
*/
if (aic->prev_phase == PH_MSGOUT)
aic->msg_outq = aic->msg_sent;
do {
int q = aic->msg_outq;
if (msgidx > 0 && msgidx == aic->msg_len) {
/* complete message sent, start the next one */
q &= -q;
aic->msg_sent |= q;
aic->msg_outq ^= q;
q = aic->msg_outq;
msgidx = 0;
}
if (msgidx == 0) {
/* setup the message */
switch (q & -q) {
case AIC_MSG_IDENTIFY:
scb = aic->nexus;
ccb = scb->ccb;
ti = &aic->tinfo[scb->target];
aic->msg_buf[0] = MSG_IDENTIFY(scb->lun,
(ti->flags & TINFO_DISC_ENB) &&
!(ccb->ccb_h.flags & CAM_DIS_DISCONNECT));
aic->msg_len = 1;
break;
case AIC_MSG_TAG_Q:
scb = aic->nexus;
ccb = scb->ccb;
aic->msg_buf[0] = ccb->csio.tag_action;
aic->msg_buf[1] = scb->tag;
aic->msg_len = 2;
break;
case AIC_MSG_SDTR:
scb = aic->nexus;
ti = &aic->tinfo[scb->target];
aic->msg_buf[0] = MSG_EXTENDED;
aic->msg_buf[1] = MSG_EXT_SDTR_LEN;
aic->msg_buf[2] = MSG_EXT_SDTR;
aic->msg_buf[3] = ti->goal.period;
aic->msg_buf[4] = ti->goal.offset;
aic->msg_len = MSG_EXT_SDTR_LEN + 2;
ti->flags |= TINFO_SDTR_SENT;
break;
case AIC_MSG_MSGBUF:
/* a single message already in the buffer */
if (aic->msg_buf[0] == MSG_BUS_DEV_RESET ||
aic->msg_buf[0] == MSG_ABORT ||
aic->msg_buf[0] == MSG_ABORT_TAG)
aic->flags |= AIC_BUSFREE_OK;
break;
}
}
/*
* If this is the last message byte of all messages,
* clear ATNO to signal transmission complete.
*/
if ((q & (q - 1)) == 0 && msgidx == aic->msg_len - 1)
aic_outb(aic, CLRSINT1, CLRATNO);
/* transmit the message byte */
aic_outb(aic, SCSIDAT, aic->msg_buf[msgidx++]);
} while (aic_spiordy(aic));
aic_outb(aic, SXFRCTL0, CHEN);
aic_outb(aic, SIMODE1, ENSCSIRST|ENBUSFREE|ENREQINIT);
}
/*
* Read data bytes.
*/
static void
aic_datain(struct aic_softc *aic)
{
struct aic_scb *scb = aic->nexus;
u_int8_t dmastat, dmacntrl0;
int n;
CAM_DEBUG_PRINT(CAM_DEBUG_TRACE, ("aic_datain\n"));
aic_outb(aic, SIMODE1, ENSCSIRST|ENPHASEMIS|ENBUSFREE);
aic_outb(aic, SXFRCTL0, SCSIEN|DMAEN|CHEN);
dmacntrl0 = ENDMA;
if (aic->flags & AIC_DWIO_ENABLE)
dmacntrl0 |= DWORDPIO;
aic_outb(aic, DMACNTRL0, dmacntrl0);
while (scb->data_len > 0) {
for (;;) {
/* wait for the fifo to fill up or a phase change */
dmastat = aic_inb(aic, DMASTAT);
if (dmastat & (INTSTAT|DFIFOFULL))
break;
}
if (dmastat & DFIFOFULL) {
n = FIFOSIZE;
} else {
/*
* No more data, wait for the remaining bytes in
* the scsi fifo to be transfer to the host fifo.
*/
while (!(aic_inb(aic, SSTAT2) & SEMPTY))
;
n = aic_inb(aic, FIFOSTAT);
}
n = imin(scb->data_len, n);
if (aic->flags & AIC_DWIO_ENABLE) {
if (n >= 12) {
aic_insl(aic, DMADATALONG, scb->data_ptr, n>>2);
scb->data_ptr += n & ~3;
scb->data_len -= n & ~3;
n &= 3;
}
} else {
if (n >= 8) {
aic_insw(aic, DMADATA, scb->data_ptr, n >> 1);
scb->data_ptr += n & ~1;
scb->data_len -= n & ~1;
n &= 1;
}
}
if (n) {
aic_outb(aic, DMACNTRL0, ENDMA|B8MODE);
aic_insb(aic, DMADATA, scb->data_ptr, n);
scb->data_ptr += n;
scb->data_len -= n;
aic_outb(aic, DMACNTRL0, dmacntrl0);
}
if (dmastat & INTSTAT)
break;
}
aic_outb(aic, SXFRCTL0, CHEN);
aic_outb(aic, SIMODE1, ENSCSIRST|ENBUSFREE|ENREQINIT);
}
/*
* Send data bytes.
*/
static void
aic_dataout(struct aic_softc *aic)
{
struct aic_scb *scb = aic->nexus;
u_int8_t dmastat, dmacntrl0, sstat2;
int n;
CAM_DEBUG_PRINT(CAM_DEBUG_TRACE, ("aic_dataout\n"));
aic_outb(aic, SIMODE1, ENSCSIRST|ENPHASEMIS|ENBUSFREE);
aic_outb(aic, SXFRCTL0, SCSIEN|DMAEN|CHEN);
dmacntrl0 = ENDMA|WRITE;
if (aic->flags & AIC_DWIO_ENABLE)
dmacntrl0 |= DWORDPIO;
aic_outb(aic, DMACNTRL0, dmacntrl0);
while (scb->data_len > 0) {
for (;;) {
/* wait for the fifo to clear up or a phase change */
dmastat = aic_inb(aic, DMASTAT);
if (dmastat & (INTSTAT|DFIFOEMP))
break;
}
if (dmastat & INTSTAT)
break;
n = imin(scb->data_len, FIFOSIZE);
if (aic->flags & AIC_DWIO_ENABLE) {
if (n >= 12) {
aic_outsl(aic, DMADATALONG, scb->data_ptr,n>>2);
scb->data_ptr += n & ~3;
scb->data_len -= n & ~3;
n &= 3;
}
} else {
if (n >= 8) {
aic_outsw(aic, DMADATA, scb->data_ptr, n >> 1);
scb->data_ptr += n & ~1;
scb->data_len -= n & ~1;
n &= 1;
}
}
if (n) {
aic_outb(aic, DMACNTRL0, ENDMA|WRITE|B8MODE);
aic_outsb(aic, DMADATA, scb->data_ptr, n);
scb->data_ptr += n;
scb->data_len -= n;
aic_outb(aic, DMACNTRL0, dmacntrl0);
}
}
for (;;) {
/* wait until all bytes in the fifos are transmitted */
dmastat = aic_inb(aic, DMASTAT);
sstat2 = aic_inb(aic, SSTAT2);
if ((dmastat & DFIFOEMP) && (sstat2 & SEMPTY))
break;
if (dmastat & INTSTAT) {
/* adjust for untransmitted bytes */
n = aic_inb(aic, FIFOSTAT) + (sstat2 & 0xf);
scb->data_ptr -= n;
scb->data_len += n;
/* clear the fifo */
aic_outb(aic, SXFRCTL0, CHEN|CLRCH);
aic_outb(aic, DMACNTRL0, RSTFIFO);
break;
}
}
aic_outb(aic, SXFRCTL0, CHEN);
aic_outb(aic, SIMODE1, ENSCSIRST|ENBUSFREE|ENREQINIT);
}
/*
* Send the scsi command.
*/
static void
aic_cmd(struct aic_softc *aic)
{
struct aic_scb *scb = aic->nexus;
struct scsi_request_sense sense_cmd;
CAM_DEBUG_PRINT(CAM_DEBUG_TRACE, ("aic_cmd\n"));
if (scb->flags & SCB_SENSE) {
/* autosense request */
sense_cmd.opcode = REQUEST_SENSE;
sense_cmd.byte2 = scb->lun << 5;
sense_cmd.length = scb->ccb->csio.sense_len;
sense_cmd.control = 0;
sense_cmd.unused[0] = 0;
sense_cmd.unused[1] = 0;
scb->cmd_ptr = (u_int8_t *)&sense_cmd;
scb->cmd_len = sizeof(sense_cmd);
scb->data_ptr = (u_int8_t *)&scb->ccb->csio.sense_data;
scb->data_len = scb->ccb->csio.sense_len;
}
aic_outb(aic, SIMODE1, ENSCSIRST|ENPHASEMIS|ENBUSFREE);
aic_outb(aic, DMACNTRL0, ENDMA|WRITE);
aic_outb(aic, SXFRCTL0, SCSIEN|DMAEN|CHEN);
aic_outsw(aic, DMADATA, (u_int16_t *)scb->cmd_ptr, scb->cmd_len >> 1);
while ((aic_inb(aic, SSTAT2) & SEMPTY) == 0 &&
(aic_inb(aic, DMASTAT) & INTSTAT) == 0)
;
aic_outb(aic, SXFRCTL0, CHEN);
aic_outb(aic, SIMODE1, ENSCSIRST|ENBUSFREE|ENREQINIT);
}
/*
* Finish off a command. The caller is responsible to remove the ccb
* from any queue.
*/
static void
aic_done(struct aic_softc *aic, struct aic_scb *scb)
{
union ccb *ccb = scb->ccb;
CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE,
("aic_done - ccb %p status %x resid %d\n",
ccb, ccb->ccb_h.status, ccb->csio.resid));
untimeout(aic_timeout, (caddr_t)scb, ccb->ccb_h.timeout_ch);
if ((scb->flags & SCB_DEVICE_RESET) != 0 &&
ccb->ccb_h.func_code != XPT_RESET_DEV) {
struct cam_path *path;
struct ccb_hdr *ccb_h;
cam_status error;
error = xpt_create_path(&path, /*periph*/NULL,
cam_sim_path(aic->sim),
scb->target,
CAM_LUN_WILDCARD);
if (error == CAM_REQ_CMP) {
xpt_async(AC_SENT_BDR, path, NULL);
xpt_free_path(path);
}
ccb_h = TAILQ_FIRST(&aic->pending_ccbs);
while (ccb_h != NULL) {
struct aic_scb *pending_scb;
pending_scb = (struct aic_scb *)ccb_h->ccb_scb_ptr;
if (ccb_h->target_id == scb->target) {
ccb_h->status |= CAM_BDR_SENT;
ccb_h = TAILQ_NEXT(ccb_h, sim_links.tqe);
TAILQ_REMOVE(&aic->pending_ccbs,
&pending_scb->ccb->ccb_h, sim_links.tqe);
aic_done(aic, pending_scb);
} else {
ccb_h->timeout_ch =
timeout(aic_timeout, (caddr_t)pending_scb,
(ccb_h->timeout * hz) / 1000);
ccb_h = TAILQ_NEXT(ccb_h, sim_links.tqe);
}
}
ccb_h = TAILQ_FIRST(&aic->nexus_ccbs);
while (ccb_h != NULL) {
struct aic_scb *nexus_scb;
nexus_scb = (struct aic_scb *)ccb_h->ccb_scb_ptr;
if (ccb_h->target_id == scb->target) {
ccb_h->status |= CAM_BDR_SENT;
ccb_h = TAILQ_NEXT(ccb_h, sim_links.tqe);
TAILQ_REMOVE(&aic->nexus_ccbs,
&nexus_scb->ccb->ccb_h, sim_links.tqe);
aic_done(aic, nexus_scb);
} else {
ccb_h->timeout_ch =
timeout(aic_timeout, (caddr_t)nexus_scb,
(ccb_h->timeout * hz) / 1000);
ccb_h = TAILQ_NEXT(ccb_h, sim_links.tqe);
}
}
}
if (aic->nexus == scb || scb->flags & SCB_DISCONNECTED)
aic->tinfo[scb->target].lubusy &= ~(1 << scb->lun);
if (aic->nexus == scb) {
aic->nexus = NULL;
}
aic_free_scb(aic, scb);
xpt_done(ccb);
}
static void
aic_poll(struct cam_sim *sim)
{
aic_intr(cam_sim_softc(sim));
}
static void
aic_timeout(void *arg)
{
struct aic_scb *scb = (struct aic_scb *)arg;
union ccb *ccb = scb->ccb;
struct aic_softc *aic = (struct aic_softc *)ccb->ccb_h.ccb_aic_ptr;
int s;
xpt_print_path(ccb->ccb_h.path);
printf("ccb %p - timed out", ccb);
if (aic->nexus && aic->nexus != scb)
printf(", nexus %p", aic->nexus->ccb);
printf(", phase 0x%x, state %d\n", aic_inb(aic, SCSISIGI), aic->state);
s = splcam();
if ((scb->flags & SCB_ACTIVE) == 0) {
splx(s);
xpt_print_path(ccb->ccb_h.path);
printf("ccb %p - timed out already completed\n", ccb);
return;
}
if ((scb->flags & SCB_DEVICE_RESET) == 0 && aic->nexus == scb) {
struct ccb_hdr *ccb_h = &scb->ccb->ccb_h;
if ((ccb_h->status & CAM_RELEASE_SIMQ) == 0) {
xpt_freeze_simq(aic->sim, /*count*/1);
ccb_h->status |= CAM_RELEASE_SIMQ;
}
TAILQ_FOREACH(ccb_h, &aic->pending_ccbs, sim_links.tqe) {
untimeout(aic_timeout, (caddr_t)ccb_h->ccb_scb_ptr,
ccb_h->timeout_ch);
}
TAILQ_FOREACH(ccb_h, &aic->nexus_ccbs, sim_links.tqe) {
untimeout(aic_timeout, (caddr_t)ccb_h->ccb_scb_ptr,
ccb_h->timeout_ch);
}
scb->flags |= SCB_DEVICE_RESET;
ccb->ccb_h.timeout_ch =
timeout(aic_timeout, (caddr_t)scb, 5 * hz);
aic_sched_msgout(aic, MSG_BUS_DEV_RESET);
} else {
if (aic->nexus == scb) {
ccb->ccb_h.status |= CAM_CMD_TIMEOUT;
aic_done(aic, scb);
}
aic_reset(aic, /*initiate_reset*/TRUE);
}
splx(s);
}
void
aic_intr(void *arg)
{
struct aic_softc *aic = (struct aic_softc *)arg;
u_int8_t sstat0, sstat1;
union ccb *ccb;
struct aic_scb *scb;
if (!(aic_inb(aic, DMASTAT) & INTSTAT))
return;
aic_outb(aic, DMACNTRL0, 0);
sstat0 = aic_inb(aic, SSTAT0);
sstat1 = aic_inb(aic, SSTAT1);
if ((sstat1 & SCSIRSTI) != 0) {
/* a device-initiated bus reset */
aic_outb(aic, CLRSINT1, CLRSCSIRSTI);
aic_reset(aic, /*initiate_reset*/FALSE);
return;
}
if ((sstat1 & SCSIPERR) != 0) {
aic_outb(aic, CLRSINT1, CLRSCSIPERR);
aic_sched_msgout(aic, MSG_PARITY_ERROR);
aic_outb(aic, DMACNTRL0, INTEN);
return;
}
if (aic_inb(aic, SSTAT4)) {
aic_outb(aic, CLRSERR, CLRSYNCERR|CLRFWERR|CLRFRERR);
aic_reset(aic, /*initiate_reset*/TRUE);
return;
}
if (aic->state <= AIC_SELECTING) {
if ((sstat0 & SELDI) != 0) {
aic_reselected(aic);
aic_outb(aic, DMACNTRL0, INTEN);
return;
}
if ((sstat0 & SELDO) != 0) {
aic_selected(aic);
aic_outb(aic, DMACNTRL0, INTEN);
return;
}
if ((sstat1 & SELTO) != 0) {
scb = aic->nexus;
ccb = scb->ccb;
ccb->ccb_h.status = CAM_SEL_TIMEOUT;
aic_done(aic, scb);
while ((sstat1 & BUSFREE) == 0)
sstat1 = aic_inb(aic, SSTAT1);
aic->flags |= AIC_BUSFREE_OK;
}
}
if ((sstat1 & BUSFREE) != 0) {
aic_outb(aic, SCSISEQ, 0);
aic_outb(aic, CLRSINT0, sstat0);
aic_outb(aic, CLRSINT1, sstat1);
if ((scb = aic->nexus)) {
if ((aic->flags & AIC_BUSFREE_OK) == 0) {
ccb = scb->ccb;
ccb->ccb_h.status = CAM_UNEXP_BUSFREE;
aic_done(aic, scb);
} else if (scb->flags & SCB_DEVICE_RESET) {
ccb = scb->ccb;
if (ccb->ccb_h.func_code == XPT_RESET_DEV) {
xpt_async(AC_SENT_BDR,
ccb->ccb_h.path, NULL);
ccb->ccb_h.status |= CAM_REQ_CMP;
} else
ccb->ccb_h.status |= CAM_CMD_TIMEOUT;
aic_done(aic, scb);
} else if (scb->flags & SCB_SENSE) {
/* autosense request */
aic->flags &= ~AIC_BUSFREE_OK;
aic->tinfo[scb->target].lubusy &=
~(1 << scb->lun);
aic_select(aic);
aic_outb(aic, DMACNTRL0, INTEN);
return;
}
}
aic->flags &= ~AIC_BUSFREE_OK;
aic->state = AIC_IDLE;
aic_start(aic);
aic_outb(aic, DMACNTRL0, INTEN);
return;
}
if ((sstat1 & REQINIT) != 0) {
u_int8_t phase = aic_inb(aic, SCSISIGI) & PH_MASK;
aic_outb(aic, SCSISIGO, phase);
aic_outb(aic, CLRSINT1, CLRPHASECHG);
switch (phase) {
case PH_MSGOUT:
aic_msgout(aic);
break;
case PH_MSGIN:
aic_msgin(aic);
break;
case PH_STAT:
scb = aic->nexus;
ccb = scb->ccb;
aic_outb(aic, DMACNTRL0, 0);
aic_outb(aic, SXFRCTL0, CHEN|SPIOEN);
scb->status = aic_inb(aic, SCSIDAT);
aic_outb(aic, SXFRCTL0, CHEN);
break;
case PH_CMD:
aic_cmd(aic);
break;
case PH_DATAIN:
aic_datain(aic);
break;
case PH_DATAOUT:
aic_dataout(aic);
break;
}
aic->prev_phase = phase;
aic_outb(aic, DMACNTRL0, INTEN);
return;
}
printf("aic_intr: unexpected intr sstat0 %x sstat1 %x\n",
sstat0, sstat1);
aic_outb(aic, DMACNTRL0, INTEN);
}
/*
* Reset ourselves.
*/
static void
aic_chip_reset(struct aic_softc *aic)
{
/*
* Doc. recommends to clear these two registers before
* operations commence
*/
aic_outb(aic, SCSITEST, 0);
aic_outb(aic, TEST, 0);
/* Reset SCSI-FIFO and abort any transfers */
aic_outb(aic, SXFRCTL0, CHEN|CLRCH|CLRSTCNT);
/* Reset HOST-FIFO */
aic_outb(aic, DMACNTRL0, RSTFIFO);
aic_outb(aic, DMACNTRL1, 0);
/* Disable all selection features */
aic_outb(aic, SCSISEQ, 0);
aic_outb(aic, SXFRCTL1, 0);
/* Disable interrupts */
aic_outb(aic, SIMODE0, 0);
aic_outb(aic, SIMODE1, 0);
/* Clear interrupts */
aic_outb(aic, CLRSINT0, 0x7f);
aic_outb(aic, CLRSINT1, 0xef);
/* Disable synchronous transfers */
aic_outb(aic, SCSIRATE, 0);
/* Haven't seen ant errors (yet) */
aic_outb(aic, CLRSERR, 0x07);
/* Set our SCSI-ID */
aic_outb(aic, SCSIID, aic->initiator << OID_S);
aic_outb(aic, BRSTCNTRL, EISA_BRST_TIM);
}
/*
* Reset the SCSI bus
*/
static void
aic_scsi_reset(struct aic_softc *aic)
{
aic_outb(aic, SCSISEQ, SCSIRSTO);
DELAY(500);
aic_outb(aic, SCSISEQ, 0);
DELAY(50);
}
/*
* Reset. Abort all pending commands.
*/
static void
aic_reset(struct aic_softc *aic, int initiate_reset)
{
struct ccb_hdr *ccb_h;
CAM_DEBUG_PRINT(CAM_DEBUG_TRACE, ("aic_reset\n"));
if (initiate_reset)
aic_scsi_reset(aic);
aic_chip_reset(aic);
xpt_async(AC_BUS_RESET, aic->path, NULL);
while ((ccb_h = TAILQ_FIRST(&aic->pending_ccbs)) != NULL) {
TAILQ_REMOVE(&aic->pending_ccbs, ccb_h, sim_links.tqe);
ccb_h->status |= CAM_SCSI_BUS_RESET;
aic_done(aic, (struct aic_scb *)ccb_h->ccb_scb_ptr);
}
while ((ccb_h = TAILQ_FIRST(&aic->nexus_ccbs)) != NULL) {
TAILQ_REMOVE(&aic->nexus_ccbs, ccb_h, sim_links.tqe);
ccb_h->status |= CAM_SCSI_BUS_RESET;
aic_done(aic, (struct aic_scb *)ccb_h->ccb_scb_ptr);
}
if (aic->nexus) {
ccb_h = &aic->nexus->ccb->ccb_h;
ccb_h->status |= CAM_SCSI_BUS_RESET;
aic_done(aic, aic->nexus);
}
aic->state = AIC_IDLE;
aic_outb(aic, DMACNTRL0, INTEN);
}
static char *aic_chip_names[] = {
"AIC6260", "AIC6360", "AIC6370", "GM82C700",
};
static struct {
int type;
char *idstring;
} aic_chip_ids[] = {
{ AIC6360, IDSTRING_AIC6360 },
{ AIC6370, IDSTRING_AIC6370 },
{ GM82C700, IDSTRING_GM82C700 },
};
static void
aic_init(struct aic_softc *aic)
{
struct aic_scb *scb;
struct aic_tinfo *ti;
u_int8_t porta, portb;
char chip_id[33];
int i;
TAILQ_INIT(&aic->pending_ccbs);
TAILQ_INIT(&aic->nexus_ccbs);
aic->nexus = NULL;
aic->state = AIC_IDLE;
aic->prev_phase = -1;
aic->flags = 0;
aic_chip_reset(aic);
aic_scsi_reset(aic);
/* determine the chip type from its ID string */
aic->chip_type = AIC6260;
aic_insb(aic, ID, chip_id, sizeof(chip_id) - 1);
chip_id[sizeof(chip_id) - 1] = '\0';
for (i = 0; i < sizeof(aic_chip_ids) / sizeof(aic_chip_ids[0]); i++) {
if (!strcmp(chip_id, aic_chip_ids[i].idstring)) {
aic->chip_type = aic_chip_ids[i].type;
break;
}
}
porta = aic_inb(aic, PORTA);
portb = aic_inb(aic, PORTB);
aic->initiator = PORTA_ID(porta);
if (PORTA_PARITY(porta))
aic->flags |= AIC_PARITY_ENABLE;
if (PORTB_DISC(portb))
aic->flags |= AIC_DISC_ENABLE;
if (PORTB_DMA(portb))
aic->flags |= AIC_DMA_ENABLE;
/*
* We can do fast SCSI (10MHz clock rate) if bit 4 of portb
* is set and we've got a 6360. The 6260 can only do standard
* 5MHz SCSI.
*/
if (aic->chip_type > AIC6260 || aic_inb(aic, REV)) {
if (PORTB_FSYNC(portb))
aic->flags |= AIC_FAST_ENABLE;
aic->flags |= AIC_DWIO_ENABLE;
}
if (aic->flags & AIC_FAST_ENABLE)
aic->max_period = AIC_FAST_SYNC_PERIOD;
else
aic->max_period = AIC_SYNC_PERIOD;
aic->min_period = AIC_MIN_SYNC_PERIOD;
free_scbs = NULL;
for (i = 255; i >= 0; i--) {
scb = &aic->scbs[i];
scb->tag = i;
aic_free_scb(aic, scb);
}
for (i = 0; i < 8; i++) {
if (i == aic->initiator)
continue;
ti = &aic->tinfo[i];
bzero(ti, sizeof(*ti));
ti->flags = TINFO_TAG_ENB;
if (aic->flags & AIC_DISC_ENABLE)
ti->flags |= TINFO_DISC_ENB;
ti->user.period = aic->max_period;
ti->user.offset = AIC_SYNC_OFFSET;
ti->scsirate = 0;
}
aic_outb(aic, DMACNTRL0, INTEN);
}
int
aic_probe(struct aic_softc *aic)
{
int i;
/* Remove aic6360 from possible powerdown mode */
aic_outb(aic, DMACNTRL0, 0);
#define STSIZE 16
aic_outb(aic, DMACNTRL1, 0); /* Reset stack pointer */
for (i = 0; i < STSIZE; i++)
aic_outb(aic, STACK, i);
/* See if we can pull out the same sequence */
aic_outb(aic, DMACNTRL1, 0);
for (i = 0; i < STSIZE && aic_inb(aic, STACK) == i; i++)
;
if (i != STSIZE)
return (ENXIO);
#undef STSIZE
return (0);
}
int
aic_attach(struct aic_softc *aic)
{
struct cam_devq *devq;
/*
* Create the device queue for our SIM.
*/
devq = cam_simq_alloc(256);
if (devq == NULL)
return (ENOMEM);
/*
* Construct our SIM entry
*/
aic->sim = cam_sim_alloc(aic_action, aic_poll, "aic", aic,
aic->unit, 2, 256, devq);
if (aic->sim == NULL) {
cam_simq_free(devq);
return (ENOMEM);
}
if (xpt_bus_register(aic->sim, 0) != CAM_SUCCESS) {
cam_sim_free(aic->sim, /*free_devq*/TRUE);
return (ENXIO);
}
if (xpt_create_path(&aic->path, /*periph*/NULL,
cam_sim_path(aic->sim), CAM_TARGET_WILDCARD,
CAM_LUN_WILDCARD) != CAM_REQ_CMP) {
xpt_bus_deregister(cam_sim_path(aic->sim));
cam_sim_free(aic->sim, /*free_devq*/TRUE);
return (ENXIO);
}
aic_init(aic);
printf("aic%d: %s", aic->unit, aic_chip_names[aic->chip_type]);
if (aic->flags & AIC_DMA_ENABLE)
printf(", dma");
if (aic->flags & AIC_DISC_ENABLE)
printf(", disconnection");
if (aic->flags & AIC_PARITY_ENABLE)
printf(", parity check");
if (aic->flags & AIC_FAST_ENABLE)
printf(", fast SCSI");
printf("\n");
return (0);
}
int
aic_detach(struct aic_softc *aic)
{
xpt_async(AC_LOST_DEVICE, aic->path, NULL);
xpt_free_path(aic->path);
xpt_bus_deregister(cam_sim_path(aic->sim));
cam_sim_free(aic->sim, /*free_devq*/TRUE);
return (0);
}