/* $NetBSD: btl.c,v 1.31 2023/12/20 06:36:02 thorpej Exp $ */
/* NetBSD: bt.c,v 1.10 1996/05/12 23:51:54 mycroft Exp */
#undef BTDIAG
#define integrate
#define notyet /* XXX - #undef this, if this driver does actually work */
/*
* Copyright (c) 1994, 1996 Charles M. Hannum. 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Charles M. Hannum.
* 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.
*/
/*
* Originally written by Julian Elischer (
[email protected])
* for TRW Financial Systems for use under the MACH(2.5) operating system.
*
* TRW Financial Systems, in accordance with their agreement with Carnegie
* Mellon University, makes this software available to CMU to distribute
* or use in any manner that they see fit as long as this message is kept with
* the software. For this reason TFS also grants any other persons or
* organisations permission to use or modify this software.
*
* TFS supplies this software to be publicly redistributed
* on the understanding that TFS is not responsible for the correct
* functioning of this software in any circumstances.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: btl.c,v 1.31 2023/12/20 06:36:02 thorpej Exp $");
#include <sys/types.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/errno.h>
#include <sys/ioctl.h>
#include <sys/device.h>
#include <sys/buf.h>
#include <sys/proc.h>
#include <machine/intr.h>
#include <machine/pio.h>
#include <arc/dti/desktech.h>
#include <dev/scsipi/scsi_all.h>
#include <dev/scsipi/scsipi_all.h>
#include <dev/scsipi/scsiconf.h>
#include <dev/isa/isavar.h>
#include <arc/dti/btlreg.h>
#include <arc/dti/btlvar.h>
#ifndef DDB
#define Debugger() panic("should call debugger here (bt742a.c)")
#endif /* ! DDB */
/*
* Mail box defs etc.
* these could be bigger but we need the bt_softc to fit on a single page..
*/
#define BT_MBX_SIZE 32 /* mail box size (MAX 255 MBxs) */
/* don't need that many really */
#define BT_CCB_MAX 32 /* store up to 32 CCBs at one time */
#define CCB_HASH_SIZE 32 /* hash table size for phystokv */
#define CCB_HASH_SHIFT 9
#define CCB_HASH(x) ((((long)(x))>>CCB_HASH_SHIFT) & (CCB_HASH_SIZE - 1))
#define bt_nextmbx(wmb, mbx, mbio) \
if ((wmb) == &(mbx)->mbio[BT_MBX_SIZE - 1]) \
(wmb) = &(mbx)->mbio[0]; \
else \
(wmb)++;
struct bt_mbx {
struct bt_mbx_out mbo[BT_MBX_SIZE];
struct bt_mbx_in mbi[BT_MBX_SIZE];
struct bt_mbx_out *cmbo; /* Collection Mail Box out */
struct bt_mbx_out *tmbo; /* Target Mail Box out */
struct bt_mbx_in *tmbi; /* Target Mail Box in */
};
#define KVTOPHYS(x) (*btl_conf->bc_kvtophys)((int)(x))
#define PHYSTOKV(x) (*btl_conf->bc_phystokv)((int)(x))
struct bt_softc {
device_t sc_dev;
void *sc_ih;
int sc_iobase;
int sc_irq, sc_drq;
char sc_model[7],
sc_firmware[6];
struct bt_mbx *sc_mbx; /* all our mailboxes */
#define wmbx (sc->sc_mbx)
struct bt_ccb *sc_ccbhash[CCB_HASH_SIZE];
TAILQ_HEAD(, bt_ccb) sc_free_ccb, sc_waiting_ccb;
TAILQ_HEAD(, bt_buf) sc_free_buf;
int sc_numccbs, sc_mbofull;
int sc_numbufs;
int sc_scsi_dev; /* adapters scsi id */
struct scsipi_link sc_link; /* prototype for devs */
struct scsipi_adapter sc_adapter;
};
#ifdef BTDEBUG
int bt_debug = 0;
#endif /* BTDEBUG */
int bt_cmd(int, struct bt_softc *, int, u_char *, int, u_char *);
integrate void bt_finish_ccbs(struct bt_softc *);
int btintr(void *);
integrate void bt_reset_ccb(struct bt_softc *, struct bt_ccb *);
void bt_free_ccb(struct bt_softc *, struct bt_ccb *);
integrate void bt_init_ccb(struct bt_softc *, struct bt_ccb *);
struct bt_ccb *bt_get_ccb(struct bt_softc *, int);
struct bt_ccb *bt_ccb_phys_kv(struct bt_softc *, u_long);
void bt_queue_ccb(struct bt_softc *, struct bt_ccb *);
void bt_collect_mbo(struct bt_softc *);
void bt_start_ccbs(struct bt_softc *);
void bt_done(struct bt_softc *, struct bt_ccb *);
int bt_find(struct isa_attach_args *, struct bt_softc *);
void bt_init(struct bt_softc *);
void bt_inquire_setup_information(struct bt_softc *);
void btminphys(struct buf *);
int bt_scsi_cmd(struct scsipi_xfer *);
int bt_poll(struct bt_softc *, struct scsipi_xfer *, int);
void bt_timeout(void *arg);
void bt_free_buf(struct bt_softc *, struct bt_buf *);
struct bt_buf * bt_get_buf(struct bt_softc *, int);
/* the below structure is so we have a default dev struct for out link struct */
struct scsipi_device bt_dev = {
NULL, /* Use default error handler */
NULL, /* have a queue, served by this */
NULL, /* have no async handler */
NULL, /* Use default 'done' routine */
};
static int btprobe(device_t, cfdata_t, void *);
static void btattach(device_t, device_t, void *);
CFATTACH_DECL_NEW(btl, sizeof(struct bt_softc),
btprobe, btattach, NULL, NULL);
#define BT_RESET_TIMEOUT 2000 /* time to wait for reset (mSec) */
#define BT_ABORT_TIMEOUT 2000 /* time to wait for abort (mSec) */
struct btl_config *btl_conf = NULL;
/*
* bt_cmd(iobase, sc, icnt, ibuf, ocnt, obuf)
*
* Activate Adapter command
* icnt: number of args (outbound bytes including opcode)
* ibuf: argument buffer
* ocnt: number of expected returned bytes
* obuf: result buffer
* wait: number of seconds to wait for response
*
* Performs an adapter command through the ports. Not to be confused with a
* scsi command, which is read in via the DMA; one of the adapter commands
* tells it to read in a scsi command.
*/
int
bt_cmd(int iobase, struct bt_softc *sc, int icnt, int ocnt, u_char *ibuf,
u_char *obuf)
{
const char *name;
int i;
int wait;
u_char sts;
u_char opcode = ibuf[0];
if (sc != NULL)
name = device_xname(sc->sc_dev);
else
name = "(bt probe)";
/*
* Calculate a reasonable timeout for the command.
*/
switch (opcode) {
case BT_INQUIRE_DEVICES:
wait = 15 * 20000;
break;
default:
wait = 1 * 20000;
break;
}
/*
* Wait for the adapter to go idle, unless it's one of
* the commands which don't need this
*/
if (opcode != BT_MBO_INTR_EN) {
for (i = 20000; i; i--) { /* 1 sec? */
sts = isa_inb(iobase + BT_STAT_PORT);
if (sts & BT_STAT_IDLE)
break;
delay(50);
}
if (!i) {
printf("%s: bt_cmd, host not idle(0x%x)\n",
name, sts);
return ENXIO;
}
}
/*
* Now that it is idle, if we expect output, preflush the
* queue feeding to us.
*/
if (ocnt) {
while ((isa_inb(iobase + BT_STAT_PORT)) & BT_STAT_DF)
isa_inb(iobase + BT_DATA_PORT);
}
/*
* Output the command and the number of arguments given
* for each byte, first check the port is empty.
*/
while (icnt--) {
for (i = wait; i; i--) {
sts = isa_inb(iobase + BT_STAT_PORT);
if (!(sts & BT_STAT_CDF))
break;
delay(50);
}
if (!i) {
if (opcode != BT_INQUIRE_REVISION &&
opcode != BT_INQUIRE_REVISION_3)
printf("%s: bt_cmd, cmd/data port full\n", name);
isa_outb(iobase + BT_CTRL_PORT, BT_CTRL_SRST);
return ENXIO;
}
isa_outb(iobase + BT_CMD_PORT, *ibuf++);
}
/*
* If we expect input, loop that many times, each time,
* looking for the data register to have valid data
*/
while (ocnt--) {
for (i = wait; i; i--) {
sts = isa_inb(iobase + BT_STAT_PORT);
if (sts & BT_STAT_DF)
break;
delay(50);
}
if (!i) {
if (opcode != BT_INQUIRE_REVISION &&
opcode != BT_INQUIRE_REVISION_3)
printf("%s: bt_cmd, cmd/data port empty %d\n",
name, ocnt);
isa_outb(iobase + BT_CTRL_PORT, BT_CTRL_SRST);
return ENXIO;
}
*obuf++ = isa_inb(iobase + BT_DATA_PORT);
}
/*
* Wait for the board to report a finished instruction.
* We may get an extra interrupt for the HACC signal, but this is
* unimportant.
*/
if (opcode != BT_MBO_INTR_EN) {
for (i = 20000; i; i--) { /* 1 sec? */
sts = isa_inb(iobase + BT_INTR_PORT);
/* XXX Need to save this in the interrupt handler? */
if (sts & BT_INTR_HACC)
break;
delay(50);
}
if (!i) {
printf("%s: bt_cmd, host not finished(0x%x)\n",
name, sts);
return ENXIO;
}
}
isa_outb(iobase + BT_CTRL_PORT, BT_CTRL_IRST);
return 0;
}
/*
* Check if the device can be found at the port given
* and if so, set it up ready for further work
* as an argument, takes the isa_device structure from
* autoconf.c
*/
static int
btprobe(device_t parent, cfdata_t cf, void *aux)
{
struct isa_attach_args *ia = aux;
#ifdef NEWCONFIG
if (ia->ia_iobase == IOBASEUNK)
return 0;
#endif
if (btl_conf == NULL)
return (0);
/* See if there is a unit at this location. */
if (bt_find(ia, NULL) != 0)
return 0;
ia->ia_msize = 0;
ia->ia_iosize = 4;
/* IRQ and DRQ set by bt_find(). */
return 1;
}
/*
* Attach all the sub-devices we can find
*/
static void
btattach(device_t parent, device_t self, void *aux)
{
struct isa_attach_args *ia = aux;
struct bt_softc *sc = device_private(self);
struct bt_ccb *ccb;
struct bt_buf *buf;
u_int bouncearea;
u_int bouncebase;
u_int bouncesize;
sc->sc_dev = self;
if (bt_find(ia, sc) != 0)
panic("btattach: bt_find of %s failed", device_xname(self));
sc->sc_iobase = ia->ia_iobase;
/*
* create mbox area
*/
(*btl_conf->bc_bouncemem)(&bouncebase, &bouncesize);
bouncearea = bouncebase + sizeof(struct bt_mbx);
sc->sc_mbx = (struct bt_mbx *)bouncebase;
bt_inquire_setup_information(sc);
bt_init(sc);
TAILQ_INIT(&sc->sc_free_ccb);
TAILQ_INIT(&sc->sc_free_buf);
TAILQ_INIT(&sc->sc_waiting_ccb);
/*
* fill up with ccb's
*/
while (sc->sc_numccbs < BT_CCB_MAX) {
ccb = (struct bt_ccb *)bouncearea;
bouncearea += sizeof(struct bt_ccb);
bt_init_ccb(sc, ccb);
TAILQ_INSERT_HEAD(&sc->sc_free_ccb, ccb, chain);
sc->sc_numccbs++;
}
/*
* fill up with bufs's
*/
while ((bouncearea + sizeof(struct bt_buf)) < bouncebase + bouncesize) {
buf = (struct bt_buf *)bouncearea;
bouncearea += sizeof(struct bt_buf);
TAILQ_INSERT_HEAD(&sc->sc_free_buf, buf, chain);
sc->sc_numbufs++;
}
/*
* Fill in the adapter.
*/
sc->sc_adapter.scsipi_cmd = bt_scsi_cmd;
sc->sc_adapter.scsipi_minphys = btminphys;
/*
* fill in the prototype scsipi_link.
*/
sc->sc_link.scsipi_scsi.channel = SCSI_CHANNEL_ONLY_ONE;
sc->sc_link.adapter_softc = sc;
sc->sc_link.scsipi_scsi.adapter_target = sc->sc_scsi_dev;
sc->sc_link.adapter = &sc->sc_adapter;
sc->sc_link.device = &bt_dev;
sc->sc_link.openings = 1;
sc->sc_link.scsipi_scsi.max_target = 7;
sc->sc_link.scsipi_scsi.max_lun = 7;
sc->sc_link.type = BUS_SCSI;
sc->sc_ih = isa_intr_establish(ia->ia_ic, sc->sc_irq, IST_EDGE,
IPL_BIO, btintr, sc);
/*
* ask the adapter what subunits are present
*/
config_found(self, &sc->sc_link, scsiprint, CFARGS_NONE);
}
integrate void
bt_finish_ccbs(struct bt_softc *sc)
{
struct bt_mbx_in *wmbi;
struct bt_ccb *ccb;
int i;
wmbi = wmbx->tmbi;
if (wmbi->stat == BT_MBI_FREE) {
for (i = 0; i < BT_MBX_SIZE; i++) {
if (wmbi->stat != BT_MBI_FREE) {
printf("%s: mbi not in round-robin order\n",
device_xname(sc->sc_dev));
goto AGAIN;
}
bt_nextmbx(wmbi, wmbx, mbi);
}
#ifdef BTDIAGnot
printf("%s: mbi interrupt with no full mailboxes\n",
device_xname(sc->sc_dev));
#endif
return;
}
AGAIN:
do {
ccb = bt_ccb_phys_kv(sc, phystol(wmbi->ccb_addr));
if (!ccb) {
printf("%s: bad mbi ccb pointer; skipping\n",
device_xname(sc->sc_dev));
goto next;
}
#ifdef BTDEBUG
if (bt_debug) {
u_char *cp = (u_char *) &ccb->scsi_cmd;
printf("op=%x %x %x %x %x %x\n",
cp[0], cp[1], cp[2], cp[3], cp[4], cp[5]);
printf("stat %x for mbi addr = 0x%08x, ",
wmbi->stat, wmbi);
printf("ccb addr = 0x%x\n", ccb);
}
#endif /* BTDEBUG */
switch (wmbi->stat) {
case BT_MBI_OK:
case BT_MBI_ERROR:
if ((ccb->flags & CCB_ABORT) != 0) {
/*
* If we already started an abort, wait for it
* to complete before clearing the CCB. We
* could instead just clear CCB_SENDING, but
* what if the mailbox was already received?
* The worst that happens here is that we clear
* the CCB a bit later than we need to. BFD.
*/
goto next;
}
break;
case BT_MBI_ABORT:
case BT_MBI_UNKNOWN:
/*
* Even if the CCB wasn't found, we clear it anyway.
* See preceding comment.
*/
break;
default:
printf("%s: bad mbi status %02x; skipping\n",
device_xname(sc->sc_dev), wmbi->stat);
goto next;
}
callout_stop(&ccb->xs->xs_callout);
bt_done(sc, ccb);
next:
wmbi->stat = BT_MBI_FREE;
bt_nextmbx(wmbi, wmbx, mbi);
} while (wmbi->stat != BT_MBI_FREE);
wmbx->tmbi = wmbi;
}
/*
* Catch an interrupt from the adaptor
*/
int
btintr(void *arg)
{
struct bt_softc *sc = arg;
int iobase = sc->sc_iobase;
u_char sts;
#ifdef BTDEBUG
printf("%s: btintr ", device_xname(sc->sc_dev));
#endif /* BTDEBUG */
/*
* First acknowledge the interrupt, Then if it's not telling about
* a completed operation just return.
*/
sts = isa_inb(iobase + BT_INTR_PORT);
if ((sts & BT_INTR_ANYINTR) == 0)
return 0;
isa_outb(iobase + BT_CTRL_PORT, BT_CTRL_IRST);
#ifdef BTDIAG
/* Make sure we clear CCB_SENDING before finishing a CCB. */
bt_collect_mbo(sc);
#endif
/* Mail box out empty? */
if (sts & BT_INTR_MBOA) {
struct bt_toggle toggle;
toggle.cmd.opcode = BT_MBO_INTR_EN;
toggle.cmd.enable = 0;
bt_cmd(iobase, sc, sizeof(toggle.cmd), (u_char *)&toggle.cmd, 0,
(u_char *)0);
bt_start_ccbs(sc);
}
/* Mail box in full? */
if (sts & BT_INTR_MBIF)
bt_finish_ccbs(sc);
return 1;
}
integrate void
bt_reset_ccb(struct bt_softc *sc, struct bt_ccb *ccb)
{
ccb->flags = 0;
}
/*
* A ccb is put onto the free list.
*/
void
bt_free_ccb(struct bt_softc *sc, struct bt_ccb *ccb)
{
int s;
s = splbio();
bt_reset_ccb(sc, ccb);
TAILQ_INSERT_HEAD(&sc->sc_free_ccb, ccb, chain);
/*
* If there were none, wake anybody waiting for one to come free,
* starting with queued entries.
*/
if (ccb->chain.tqe_next == 0)
wakeup(&sc->sc_free_ccb);
splx(s);
}
/*
* A buf is put onto the free list.
*/
void
bt_free_buf(struct bt_softc *sc, struct bt_buf *buf)
{
int s;
s = splbio();
TAILQ_INSERT_HEAD(&sc->sc_free_buf, buf, chain);
sc->sc_numbufs++;
/*
* If there were none, wake anybody waiting for one to come free,
* starting with queued entries.
*/
if (buf->chain.tqe_next == 0)
wakeup(&sc->sc_free_buf);
splx(s);
}
integrate void
bt_init_ccb(struct bt_softc *sc, struct bt_ccb *ccb)
{
int hashnum;
memset(ccb, 0, sizeof(struct bt_ccb));
/*
* put in the phystokv hash table
* Never gets taken out.
*/
ccb->hashkey = KVTOPHYS(ccb);
hashnum = CCB_HASH(ccb->hashkey);
ccb->nexthash = sc->sc_ccbhash[hashnum];
sc->sc_ccbhash[hashnum] = ccb;
bt_reset_ccb(sc, ccb);
}
/*
* Get a free ccb
*
* If there are none, either return an error or sleep.
*/
struct bt_ccb *
bt_get_ccb(struct bt_softc *sc, int nosleep)
{
struct bt_ccb *ccb;
int s;
s = splbio();
/*
* If we can and have to, sleep waiting for one to come free.
*/
for (;;) {
ccb = sc->sc_free_ccb.tqh_first;
if (ccb) {
TAILQ_REMOVE(&sc->sc_free_ccb, ccb, chain);
break;
}
if (nosleep)
goto out;
tsleep(&sc->sc_free_ccb, PRIBIO, "btccb", 0);
}
ccb->flags |= CCB_ALLOC;
out:
splx(s);
return ccb;
}
/*
* Get a free buf
*
* If there are none, either return an error or sleep.
*/
struct bt_buf *
bt_get_buf(struct bt_softc *sc, int nosleep)
{
struct bt_buf *buf;
int s;
s = splbio();
/*
* If we can and have to, sleep waiting for one to come free.
*/
for (;;) {
buf = sc->sc_free_buf.tqh_first;
if (buf) {
TAILQ_REMOVE(&sc->sc_free_buf, buf, chain);
sc->sc_numbufs--;
break;
}
if (nosleep)
goto out;
tsleep(&sc->sc_free_buf, PRIBIO, "btbuf", 0);
}
out:
splx(s);
return buf;
}
/*
* Given a physical address, find the ccb that it corresponds to.
*/
struct bt_ccb *
bt_ccb_phys_kv(struct bt_softc *sc, u_long ccb_phys)
{
int hashnum = CCB_HASH(ccb_phys);
struct bt_ccb *ccb = sc->sc_ccbhash[hashnum];
while (ccb) {
if (ccb->hashkey == ccb_phys)
break;
ccb = ccb->nexthash;
}
return ccb;
}
/*
* Queue a CCB to be sent to the controller, and send it if possible.
*/
void
bt_queue_ccb(struct bt_softc *sc, struct bt_ccb *ccb)
{
TAILQ_INSERT_TAIL(&sc->sc_waiting_ccb, ccb, chain);
bt_start_ccbs(sc);
}
/*
* Garbage collect mailboxes that are no longer in use.
*/
void
bt_collect_mbo(struct bt_softc *sc)
{
struct bt_mbx_out *wmbo; /* Mail Box Out pointer */
wmbo = wmbx->cmbo;
while (sc->sc_mbofull > 0) {
if (wmbo->cmd != BT_MBO_FREE)
break;
#ifdef BTDIAG
ccb = bt_ccb_phys_kv(sc, phystol(wmbo->ccb_addr));
ccb->flags &= ~CCB_SENDING;
#endif
--sc->sc_mbofull;
bt_nextmbx(wmbo, wmbx, mbo);
}
wmbx->cmbo = wmbo;
}
/*
* Send as many CCBs as we have empty mailboxes for.
*/
void
bt_start_ccbs(struct bt_softc *sc)
{
int iobase = sc->sc_iobase;
struct bt_mbx_out *wmbo; /* Mail Box Out pointer */
struct bt_ccb *ccb;
wmbo = wmbx->tmbo;
while ((ccb = sc->sc_waiting_ccb.tqh_first) != NULL) {
if (sc->sc_mbofull >= BT_MBX_SIZE) {
bt_collect_mbo(sc);
if (sc->sc_mbofull >= BT_MBX_SIZE) {
struct bt_toggle toggle;
toggle.cmd.opcode = BT_MBO_INTR_EN;
toggle.cmd.enable = 1;
bt_cmd(iobase, sc, sizeof(toggle.cmd),
(u_char *)&toggle.cmd, 0, (u_char *)0);
break;
}
}
TAILQ_REMOVE(&sc->sc_waiting_ccb, ccb, chain);
#ifdef BTDIAG
ccb->flags |= CCB_SENDING;
#endif
/* Link ccb to mbo. */
ltophys(KVTOPHYS(ccb), wmbo->ccb_addr);
if (ccb->flags & CCB_ABORT)
wmbo->cmd = BT_MBO_ABORT;
else
wmbo->cmd = BT_MBO_START;
/* Tell the card to poll immediately. */
isa_outb(iobase + BT_CMD_PORT, BT_START_SCSI);
if ((ccb->xs->xs_control & XS_CTL_POLL) == 0)
callout_reset(&ccb->xs->xs_callout,
mstohz(ccb->timeout), bt_timeout, ccb);
++sc->sc_mbofull;
bt_nextmbx(wmbo, wmbx, mbo);
}
wmbx->tmbo = wmbo;
}
/*
* We have a ccb which has been processed by the
* adaptor, now we look to see how the operation
* went. Wake up the owner if waiting
*/
void
bt_done(struct bt_softc *sc, struct bt_ccb *ccb)
{
struct scsi_sense_data *s1, *s2;
struct scsipi_xfer *xs = ccb->xs;
u_long thiskv, thisbounce;
int bytes_this_page, datalen;
struct bt_scat_gath *sg;
int seg;
SC_DEBUG(xs->sc_link, SDEV_DB2, ("bt_done\n"));
/*
* Otherwise, put the results of the operation
* into the xfer and call whoever started it
*/
#ifdef BTDIAG
if (ccb->flags & CCB_SENDING) {
printf("%s: exiting ccb still in transit!\n",
device_xname(sc->sc_dev));
Debugger();
return;
}
#endif
if ((ccb->flags & CCB_ALLOC) == 0) {
printf("%s: exiting ccb not allocated!\n",
device_xname(sc->sc_dev));
Debugger();
return;
}
if (xs->error == XS_NOERROR) {
if (ccb->host_stat != BT_OK) {
switch (ccb->host_stat) {
case BT_SEL_TIMEOUT: /* No response */
xs->error = XS_SELTIMEOUT;
break;
default: /* Other scsi protocol messes */
printf("%s: host_stat %x\n",
device_xname(sc->sc_dev), ccb->host_stat);
xs->error = XS_DRIVER_STUFFUP;
break;
}
} else if (ccb->target_stat != SCSI_OK) {
switch (ccb->target_stat) {
case SCSI_CHECK:
s1 = &ccb->scsi_sense;
s2 = &xs->sense.scsi_sense;
*s2 = *s1;
xs->error = XS_SENSE;
break;
case SCSI_BUSY:
xs->error = XS_BUSY;
break;
default:
printf("%s: target_stat %x\n",
device_xname(sc->sc_dev), ccb->target_stat);
xs->error = XS_DRIVER_STUFFUP;
break;
}
} else
xs->resid = 0;
}
if((datalen = xs->datalen) != 0) {
thiskv = (int)xs->data;
sg = ccb->scat_gath;
seg = phystol(ccb->data_length) / sizeof(struct bt_scat_gath);
while (seg) {
thisbounce = PHYSTOKV(phystol(sg->seg_addr));
bytes_this_page = phystol(sg->seg_len);
if(xs->xs_control & XS_CTL_DATA_IN) {
memcpy((void *)thiskv, (void *)thisbounce, bytes_this_page);
}
bt_free_buf(sc, (struct bt_buf *)thisbounce);
thiskv += bytes_this_page;
datalen -= bytes_this_page;
sg++;
seg--;
}
}
bt_free_ccb(sc, ccb);
xs->xs_status |= XS_STS_DONE;
scsipi_done(xs);
}
/*
* Find the board and find its irq/drq
*/
int
bt_find(struct isa_attach_args *ia, struct bt_softc *sc)
{
int iobase = ia->ia_iobase;
int i;
u_char sts;
struct bt_extended_inquire inquire;
struct bt_config config;
int irq, drq;
#ifndef notyet
/* Check something is at the ports we need to access */
sts = isa_inb(iobase + BHA_STAT_PORT);
if (sts == 0xFF)
return (0);
#endif
/*
* reset board, If it doesn't respond, assume
* that it's not there.. good for the probe
*/
isa_outb(iobase + BT_CTRL_PORT, BT_CTRL_HRST | BT_CTRL_SRST);
delay(100);
for (i = BT_RESET_TIMEOUT; i; i--) {
sts = isa_inb(iobase + BT_STAT_PORT);
if (sts == (BT_STAT_IDLE | BT_STAT_INIT))
break;
delay(1000);
}
if (!i) {
#ifdef BTDEBUG
if (bt_debug)
printf("bt_find: No answer from buslogic board\n");
#endif /* BTDEBUG */
return 1;
}
#ifndef notyet
/*
* The BusLogic cards implement an Adaptec 1542 (aha)-compatible
* interface. The native bha interface is not compatible with
* an aha. 1542. We need to ensure that we never match an
* Adaptec 1542. We must also avoid sending Adaptec-compatible
* commands to a real bha, lest it go into 1542 emulation mode.
* (On an indirect bus like ISA, we should always probe for BusLogic
* interfaces before Adaptec interfaces).
*/
/*
* Make sure we don't match an AHA-1542A or AHA-1542B, by checking
* for an extended-geometry register. The 1542[AB] don't have one.
*/
sts = isa_inb(iobase + BT_EXTGEOM_PORT);
if (sts == 0xFF)
return (0);
#endif /* notyet */
/*
* Check that we actually know how to use this board.
*/
delay(1000);
memset(&inquire, 0, sizeof inquire);
inquire.cmd.opcode = BT_INQUIRE_EXTENDED;
inquire.cmd.len = sizeof(inquire.reply);
i = bt_cmd(iobase, sc, sizeof(inquire.cmd), (u_char *)&inquire.cmd,
sizeof(inquire.reply), (u_char *)&inquire.reply);
#ifndef notyet
/*
* Some 1542Cs (CP, perhaps not CF, may depend on firmware rev)
* have the extended-geometry register and also respond to
* BHA_INQUIRE_EXTENDED. Make sure we never match such cards,
* by checking the size of the reply is what a BusLogic card returns.
*/
if (i) { /* XXX - this doesn't really check the size. ??? see bha.c */
#ifdef BTDEBUG
printf("bt_find: board returned %d instead of %d to %s\n",
i, sizeof(inquire.reply), "INQUIRE_EXTENDED");
#endif
return (0);
}
/* OK, we know we've found a buslogic adaptor. */
#endif /* notyet */
switch (inquire.reply.bus_type) {
case BT_BUS_TYPE_24BIT:
case BT_BUS_TYPE_32BIT:
break;
case BT_BUS_TYPE_MCA:
/* We don't grok MicroChannel (yet). */
return 1;
default:
printf("bt_find: illegal bus type %c\n", inquire.reply.bus_type);
return 1;
}
/*
* Assume we have a board at this stage setup DMA channel from
* jumpers and save int level
*/
delay(1000);
config.cmd.opcode = BT_INQUIRE_CONFIG;
bt_cmd(iobase, sc, sizeof(config.cmd), (u_char *)&config.cmd,
sizeof(config.reply), (u_char *)&config.reply);
switch (config.reply.chan) {
case EISADMA:
drq = DRQUNK;
break;
case CHAN0:
drq = 0;
break;
case CHAN5:
drq = 5;
break;
case CHAN6:
drq = 6;
break;
case CHAN7:
drq = 7;
break;
default:
printf("bt_find: illegal drq setting %x\n", config.reply.chan);
return 1;
}
switch (config.reply.intr) {
case INT9:
irq = 9;
break;
case INT10:
irq = 10;
break;
case INT11:
irq = 11;
break;
case INT12:
irq = 12;
break;
case INT14:
irq = 14;
break;
case INT15:
irq = 15;
break;
default:
printf("bt_find: illegal irq setting %x\n", config.reply.intr);
return 1;
}
if (sc != NULL) {
/* who are we on the scsi bus? */
sc->sc_scsi_dev = config.reply.scsi_dev;
sc->sc_iobase = iobase;
sc->sc_irq = irq;
sc->sc_drq = drq;
} else {
if (ia->ia_irq == IRQUNK)
ia->ia_irq = irq;
else if (ia->ia_irq != irq)
return 1;
if (ia->ia_drq == DRQUNK)
ia->ia_drq = drq;
else if (ia->ia_drq != drq)
return 1;
}
return 0;
}
/*
* Start the board, ready for normal operation
*/
void
bt_init(struct bt_softc *sc)
{
int iobase = sc->sc_iobase;
struct bt_devices devices;
struct bt_setup setup;
struct bt_mailbox mailbox;
struct bt_period period;
int i;
/* Enable round-robin scheme - appeared at firmware rev. 3.31. */
if (strcmp(sc->sc_firmware, "3.31") >= 0) {
struct bt_toggle toggle;
toggle.cmd.opcode = BT_ROUND_ROBIN;
toggle.cmd.enable = 1;
bt_cmd(iobase, sc, sizeof(toggle.cmd), (u_char *)&toggle.cmd,
0, (u_char *)0);
}
/* Inquire Installed Devices (to force synchronous negotiation). */
devices.cmd.opcode = BT_INQUIRE_DEVICES;
bt_cmd(iobase, sc, sizeof(devices.cmd), (u_char *)&devices.cmd,
sizeof(devices.reply), (u_char *)&devices.reply);
/* Obtain setup information from. */
setup.cmd.opcode = BT_INQUIRE_SETUP;
setup.cmd.len = sizeof(setup.reply);
bt_cmd(iobase, sc, sizeof(setup.cmd), (u_char *)&setup.cmd,
sizeof(setup.reply), (u_char *)&setup.reply);
printf("%s: %s, %s\n",
device_xname(sc->sc_dev),
setup.reply.sync_neg ? "sync" : "async",
setup.reply.parity ? "parity" : "no parity");
for (i = 0; i < 8; i++)
period.reply.period[i] = setup.reply.sync[i].period * 5 + 20;
if (sc->sc_firmware[0] >= '3') {
period.cmd.opcode = BT_INQUIRE_PERIOD;
period.cmd.len = sizeof(period.reply);
bt_cmd(iobase, sc, sizeof(period.cmd), (u_char *)&period.cmd,
sizeof(period.reply), (u_char *)&period.reply);
}
for (i = 0; i < 8; i++) {
if (!setup.reply.sync[i].valid ||
(!setup.reply.sync[i].offset && !setup.reply.sync[i].period))
continue;
printf("%s targ %d: sync, offset %d, period %dnsec\n",
device_xname(sc->sc_dev), i,
setup.reply.sync[i].offset, period.reply.period[i] * 10);
}
/*
* Set up initial mail box for round-robin operation.
*/
for (i = 0; i < BT_MBX_SIZE; i++) {
wmbx->mbo[i].cmd = BT_MBO_FREE;
wmbx->mbi[i].stat = BT_MBI_FREE;
}
wmbx->cmbo = wmbx->tmbo = &wmbx->mbo[0];
wmbx->tmbi = &wmbx->mbi[0];
sc->sc_mbofull = 0;
/* Initialize mail box. */
mailbox.cmd.opcode = BT_MBX_INIT_EXTENDED;
mailbox.cmd.nmbx = BT_MBX_SIZE;
ltophys(KVTOPHYS(wmbx), mailbox.cmd.addr);
bt_cmd(iobase, sc, sizeof(mailbox.cmd), (u_char *)&mailbox.cmd,
0, (u_char *)0);
}
void
bt_inquire_setup_information(struct bt_softc *sc)
{
int iobase = sc->sc_iobase;
struct bt_model model;
struct bt_revision revision;
struct bt_digit digit;
char *p;
/*
* Get the firmware revision.
*/
p = sc->sc_firmware;
revision.cmd.opcode = BT_INQUIRE_REVISION;
bt_cmd(iobase, sc, sizeof(revision.cmd), (u_char *)&revision.cmd,
sizeof(revision.reply), (u_char *)&revision.reply);
*p++ = revision.reply.firm_revision;
*p++ = '.';
*p++ = revision.reply.firm_version;
digit.cmd.opcode = BT_INQUIRE_REVISION_3;
bt_cmd(iobase, sc, sizeof(digit.cmd), (u_char *)&digit.cmd,
sizeof(digit.reply), (u_char *)&digit.reply);
*p++ = digit.reply.digit;
if (revision.reply.firm_revision >= '3' ||
(revision.reply.firm_revision == '3' && revision.reply.firm_version >= '3')) {
digit.cmd.opcode = BT_INQUIRE_REVISION_4;
bt_cmd(iobase, sc, sizeof(digit.cmd), (u_char *)&digit.cmd,
sizeof(digit.reply), (u_char *)&digit.reply);
*p++ = digit.reply.digit;
}
while (p > sc->sc_firmware && (p[-1] == ' ' || p[-1] == '\0'))
p--;
*p = '\0';
/*
* Get the model number.
*/
if (revision.reply.firm_revision >= '3') {
p = sc->sc_model;
model.cmd.opcode = BT_INQUIRE_MODEL;
model.cmd.len = sizeof(model.reply);
bt_cmd(iobase, sc, sizeof(model.cmd), (u_char *)&model.cmd,
sizeof(model.reply), (u_char *)&model.reply);
*p++ = model.reply.id[0];
*p++ = model.reply.id[1];
*p++ = model.reply.id[2];
*p++ = model.reply.id[3];
while (p > sc->sc_model && (p[-1] == ' ' || p[-1] == '\0'))
p--;
*p++ = model.reply.version[0];
*p++ = model.reply.version[1];
while (p > sc->sc_model && (p[-1] == ' ' || p[-1] == '\0'))
p--;
*p = '\0';
} else
strcpy(sc->sc_model, "542B");
printf(": model BT-%s, firmware %s\n", sc->sc_model, sc->sc_firmware);
}
void
btminphys(struct buf *bp)
{
if (bp->b_bcount > ((BT_NSEG - 1) << PGSHIFT))
bp->b_bcount = ((BT_NSEG - 1) << PGSHIFT);
minphys(bp);
}
/*
* start a scsi operation given the command and the data address. Also needs
* the unit, target and lu.
*/
int
bt_scsi_cmd(struct scsipi_xfer *xs)
{
struct scsipi_link *sc_link = xs->sc_link;
struct bt_softc *sc = sc_link->adapter_softc;
struct bt_ccb *ccb;
struct bt_scat_gath *sg;
int seg; /* scatter gather seg being worked on */
u_long thiskv, thisbounce;
int bytes_this_page, datalen, control;
int s;
SC_DEBUG(sc_link, SDEV_DB2, ("bt_scsi_cmd\n"));
/*
* get a ccb to use. If the transfer
* is from a buf (possibly from interrupt time)
* then we can't allow it to sleep
*/
control = xs->xs_control;
if ((ccb = bt_get_ccb(sc, control & XS_CTL_NOSLEEP)) == NULL) {
xs->error = XS_DRIVER_STUFFUP;
return TRY_AGAIN_LATER;
}
ccb->xs = xs;
ccb->timeout = xs->timeout;
/*
* Put all the arguments for the xfer in the ccb
*/
if (control & XS_CTL_RESET) {
ccb->opcode = BT_RESET_CCB;
ccb->scsi_cmd_length = 0;
} else {
/* can't use S/G if zero length */
if (xs->cmdlen > sizeof(ccb->scsi_cmd)) {
printf("%s: cmdlen %d too large for CCB\n",
device_xname(sc->sc_dev), xs->cmdlen);
xs->error = XS_DRIVER_STUFFUP;
bt_free_ccb(sc, ccb);
return COMPLETE;
}
ccb->opcode = (xs->datalen ? BT_INIT_SCAT_GATH_CCB
: BT_INITIATOR_CCB);
memcpy(&ccb->scsi_cmd, xs->cmd,
ccb->scsi_cmd_length = xs->cmdlen);
}
if (xs->datalen) {
sg = ccb->scat_gath;
seg = 0;
/*
* Set up the scatter-gather block.
*/
SC_DEBUG(sc_link, SDEV_DB4,
("%d @0x%x:- ", xs->datalen, xs->data));
datalen = xs->datalen;
thiskv = (int)xs->data;
while (datalen && seg < BT_NSEG) {
/* put in the base address of a buf */
thisbounce = (u_long)
bt_get_buf(sc, control & XS_CTL_NOSLEEP);
if(thisbounce == 0)
break;
ltophys(KVTOPHYS(thisbounce), sg->seg_addr);
bytes_this_page = uimin(sizeof(struct bt_buf), datalen);
if (control & XS_CTL_DATA_OUT) {
memcpy((void *)thisbounce, (void *)thiskv, bytes_this_page);
}
thiskv += bytes_this_page;
datalen -= bytes_this_page;
ltophys(bytes_this_page, sg->seg_len);
sg++;
seg++;
}
SC_DEBUGN(sc_link, SDEV_DB4, ("\n"));
if (datalen) {
printf("%s: bt_scsi_cmd, out of bufs %d of %d left.\n",
device_xname(sc->sc_dev), datalen, xs->datalen);
goto badbuf;
}
ltophys(KVTOPHYS(ccb->scat_gath), ccb->data_addr);
ltophys(seg * sizeof(struct bt_scat_gath), ccb->data_length);
} else { /* No data xfer, use non S/G values */
ltophys(0, ccb->data_addr);
ltophys(0, ccb->data_length);
}
ccb->data_out = 0;
ccb->data_in = 0;
ccb->target = sc_link->scsipi_scsi.target;
ccb->lun = sc_link->scsipi_scsi.lun;
ltophys(KVTOPHYS(&ccb->scsi_sense), ccb->sense_ptr);
ccb->req_sense_length = sizeof(ccb->scsi_sense);
ccb->host_stat = 0x00;
ccb->target_stat = 0x00;
ccb->link_id = 0;
ltophys(0, ccb->link_addr);
s = splbio();
bt_queue_ccb(sc, ccb);
splx(s);
/*
* Usually return SUCCESSFULLY QUEUED
*/
SC_DEBUG(sc_link, SDEV_DB3, ("cmd_sent\n"));
if ((control & XS_CTL_POLL) == 0)
return SUCCESSFULLY_QUEUED;
/*
* If we can't use interrupts, poll on completion
*/
if (bt_poll(sc, xs, ccb->timeout)) {
bt_timeout(ccb);
if (bt_poll(sc, xs, ccb->timeout))
bt_timeout(ccb);
}
return COMPLETE;
badbuf:
sg = ccb->scat_gath;
while (seg) {
thisbounce = PHYSTOKV(phystol(sg->seg_addr));
bt_free_buf(sc, (struct bt_buf *)thisbounce);
sg++;
seg--;
}
xs->error = XS_DRIVER_STUFFUP;
bt_free_ccb(sc, ccb);
return TRY_AGAIN_LATER;
}
/*
* Poll a particular unit, looking for a particular xs
*/
int
bt_poll(struct bt_softc *sc, struct scsipi_xfer *xs, int count)
{
int iobase = sc->sc_iobase;
/* timeouts are in msec, so we loop in 1000 usec cycles */
while (count) {
/*
* If we had interrupts enabled, would we
* have got an interrupt?
*/
if (isa_inb(iobase + BT_INTR_PORT) & BT_INTR_ANYINTR)
btintr(sc);
if (xs->xs_status & XS_STS_DONE)
return 0;
delay(1000); /* only happens in boot so ok */
count--;
}
return 1;
}
void
bt_timeout(void *arg)
{
struct bt_ccb *ccb = arg;
struct scsipi_xfer *xs = ccb->xs;
struct scsipi_link *sc_link = xs->sc_link;
struct bt_softc *sc = sc_link->adapter_softc;
int s;
scsi_print_addr(sc_link);
printf("timed out");
s = splbio();
#ifdef BTDIAG
/*
* If the ccb's mbx is not free, then the board has gone Far East?
*/
bt_collect_mbo(sc);
if (ccb->flags & CCB_SENDING) {
printf("%s: not taking commands!\n", device_xname(sc->sc_dev));
Debugger();
}
#endif
/*
* If it has been through before, then
* a previous abort has failed, don't
* try abort again
*/
if (ccb->flags & CCB_ABORT) {
/* abort timed out */
printf(" AGAIN\n");
/* XXX Must reset! */
} else {
/* abort the operation that has timed out */
printf("\n");
ccb->xs->error = XS_TIMEOUT;
ccb->timeout = BT_ABORT_TIMEOUT;
ccb->flags |= CCB_ABORT;
bt_queue_ccb(sc, ccb);
}
splx(s);
}
