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NetBSD/sys/dev/scsipi/scsi_base.c

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/* $NetBSD: scsi_base.c,v 1.29 1995/05/03 19:38:57 mycroft Exp $ */
/*
* Copyright (c) 1994, 1995 Charles 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 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 (julian@dialix.oz.au)
*/
#include <sys/types.h>
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/buf.h>
#include <sys/uio.h>
#include <sys/malloc.h>
#include <sys/errno.h>
#include <sys/device.h>
#include <scsi/scsi_all.h>
#include <scsi/scsi_disk.h>
#include <scsi/scsiconf.h>
#ifdef DDB
int Debugger();
#else /* DDB */
#define Debugger()
#endif /* DDB */
void scsi_error __P((struct scsi_xfer *, int));
LIST_HEAD(xs_free_list, scsi_xfer) xs_free_list;
/*
* Get a scsi transfer structure for the caller. Charge the structure
* to the device that is referenced by the sc_link structure. If the
* sc_link structure has no 'credits' then the device already has the
* maximum number or outstanding operations under way. In this stage,
* wait on the structure so that when one is freed, we are awoken again
* If the SCSI_NOSLEEP flag is set, then do not wait, but rather, return
* a NULL pointer, signifying that no slots were available
* Note in the link structure, that we are waiting on it.
*/
struct scsi_xfer *
scsi_get_xs(sc_link, flags)
struct scsi_link *sc_link; /* who to charge the xs to */
int flags; /* if this call can sleep */
{
struct scsi_xfer *xs;
int s;
SC_DEBUG(sc_link, SDEV_DB3, ("scsi_get_xs\n"));
s = splbio();
while (sc_link->openings <= 0) {
SC_DEBUG(sc_link, SDEV_DB3, ("sleeping\n"));
if ((flags & SCSI_NOSLEEP) != 0) {
splx(s);
return 0;
}
sc_link->flags |= SDEV_WAITING;
(void) tsleep(sc_link, PRIBIO, "getxs", 0);
}
sc_link->openings--;
if (xs = xs_free_list.lh_first) {
LIST_REMOVE(xs, free_list);
splx(s);
} else {
splx(s);
SC_DEBUG(sc_link, SDEV_DB3, ("making\n"));
xs = malloc(sizeof(*xs), M_DEVBUF,
((flags & SCSI_NOSLEEP) != 0 ? M_NOWAIT : M_WAITOK));
if (!xs) {
sc_print_addr(sc_link);
printf("cannot allocate scsi xs\n");
return 0;
}
}
SC_DEBUG(sc_link, SDEV_DB3, ("returning\n"));
xs->flags = INUSE | flags;
return xs;
}
/*
* Given a scsi_xfer struct, and a device (referenced through sc_link)
* return the struct to the free pool and credit the device with it
* If another process is waiting for an xs, do a wakeup, let it proceed
*/
void
scsi_free_xs(xs, flags)
struct scsi_xfer *xs;
int flags;
{
struct scsi_link *sc_link = xs->sc_link;
xs->flags &= ~INUSE;
LIST_INSERT_HEAD(&xs_free_list, xs, free_list);
SC_DEBUG(sc_link, SDEV_DB3, ("scsi_free_xs\n"));
/* if was 0 and someone waits, wake them up */
sc_link->openings++;
if ((sc_link->flags & SDEV_WAITING) != 0) {
sc_link->flags &= ~SDEV_WAITING;
wakeup(sc_link);
} else {
if (sc_link->device->start) {
SC_DEBUG(sc_link, SDEV_DB2, ("calling private start()\n"));
(*(sc_link->device->start)) (sc_link->device_softc);
}
}
}
/*
* Make a scsi_xfer, and return a pointer to it.
*/
static __inline struct scsi_xfer *
scsi_make_xs(sc_link, scsi_cmd, cmdlen, data_addr, datalen,
retries, timeout, bp, flags)
struct scsi_link *sc_link;
struct scsi_generic *scsi_cmd;
int cmdlen;
u_char *data_addr;
int datalen;
int retries;
int timeout;
struct buf *bp;
int flags;
{
struct scsi_xfer *xs;
if ((xs = scsi_get_xs(sc_link, flags)) == NULL)
return NULL;
/*
* Fill out the scsi_xfer structure. We don't know whose context
* the cmd is in, so copy it.
*/
xs->sc_link = sc_link;
bcopy(scsi_cmd, &xs->cmdstore, cmdlen);
xs->cmd = &xs->cmdstore;
xs->cmdlen = cmdlen;
xs->data = data_addr;
xs->datalen = datalen;
xs->retries = retries;
xs->timeout = timeout;
xs->bp = bp;
return xs;
}
/*
* Find out from the device what its capacity is.
*/
u_long
scsi_size(sc_link, flags)
struct scsi_link *sc_link;
int flags;
{
struct scsi_read_cap_data rdcap;
struct scsi_read_capacity scsi_cmd;
u_long size;
/*
* make up a scsi command and ask the scsi driver to do
* it for you.
*/
bzero(&scsi_cmd, sizeof(scsi_cmd));
scsi_cmd.opcode = READ_CAPACITY;
/*
* If the command works, interpret the result as a 4 byte
* number of blocks
*/
if (scsi_scsi_cmd(sc_link, (struct scsi_generic *)&scsi_cmd,
sizeof(scsi_cmd), (u_char *)&rdcap, sizeof(rdcap),
2, 20000, NULL, flags | SCSI_DATA_IN) != 0) {
sc_print_addr(sc_link);
printf("could not get size\n");
return 0;
} else {
size = rdcap.addr_0 + 1;
size += rdcap.addr_1 << 8;
size += rdcap.addr_2 << 16;
size += rdcap.addr_3 << 24;
}
return size;
}
/*
* Get scsi driver to send a "are you ready?" command
*/
int
scsi_test_unit_ready(sc_link, flags)
struct scsi_link *sc_link;
int flags;
{
struct scsi_test_unit_ready scsi_cmd;
bzero(&scsi_cmd, sizeof(scsi_cmd));
scsi_cmd.opcode = TEST_UNIT_READY;
return scsi_scsi_cmd(sc_link, (struct scsi_generic *) &scsi_cmd,
sizeof(scsi_cmd), 0, 0, 2, 10000, NULL, flags);
}
/*
* Do a scsi operation, asking a device to run as SCSI-II if it can.
*/
int
scsi_change_def(sc_link, flags)
struct scsi_link *sc_link;
int flags;
{
struct scsi_changedef scsi_cmd;
bzero(&scsi_cmd, sizeof(scsi_cmd));
scsi_cmd.opcode = CHANGE_DEFINITION;
scsi_cmd.how = SC_SCSI_2;
return scsi_scsi_cmd(sc_link, (struct scsi_generic *) &scsi_cmd,
sizeof(scsi_cmd), 0, 0, 2, 100000, NULL, flags);
}
/*
* Do a scsi operation asking a device what it is
* Use the scsi_cmd routine in the switch table.
*/
int
scsi_inquire(sc_link, inqbuf, flags)
struct scsi_link *sc_link;
struct scsi_inquiry_data *inqbuf;
int flags;
{
struct scsi_inquiry scsi_cmd;
bzero(&scsi_cmd, sizeof(scsi_cmd));
scsi_cmd.opcode = INQUIRY;
scsi_cmd.length = sizeof(struct scsi_inquiry_data);
return scsi_scsi_cmd(sc_link, (struct scsi_generic *) &scsi_cmd,
sizeof(scsi_cmd), (u_char *) inqbuf,
sizeof(struct scsi_inquiry_data), 2, 10000, NULL,
SCSI_DATA_IN | flags);
}
/*
* Prevent or allow the user to remove the media
*/
int
scsi_prevent(sc_link, type, flags)
struct scsi_link *sc_link;
int type, flags;
{
struct scsi_prevent scsi_cmd;
bzero(&scsi_cmd, sizeof(scsi_cmd));
scsi_cmd.opcode = PREVENT_ALLOW;
scsi_cmd.how = type;
return scsi_scsi_cmd(sc_link, (struct scsi_generic *) &scsi_cmd,
sizeof(scsi_cmd), 0, 0, 2, 5000, NULL, flags);
}
/*
* Get scsi driver to send a "start up" command
*/
int
scsi_start(sc_link, type, flags)
struct scsi_link *sc_link;
int type, flags;
{
struct scsi_start_stop scsi_cmd;
bzero(&scsi_cmd, sizeof(scsi_cmd));
scsi_cmd.opcode = START_STOP;
scsi_cmd.byte2 = 0x00;
scsi_cmd.how = type;
return scsi_scsi_cmd(sc_link, (struct scsi_generic *) &scsi_cmd,
sizeof(scsi_cmd), 0, 0, 2,
type == SSS_START ? 30000 : 10000, NULL, flags);
}
/*
* This routine is called by the scsi interrupt when the transfer is complete.
*/
void
scsi_done(xs)
struct scsi_xfer *xs;
{
struct scsi_link *sc_link = xs->sc_link;
int error;
SC_DEBUG(sc_link, SDEV_DB2, ("scsi_done\n"));
#ifdef SCSIDEBUG
if ((sc_link->flags & SDEV_DB1) != 0)
show_scsi_cmd(xs);
#endif /* SCSIDEBUG */
/*
* If it's a user level request, bypass all usual completion processing,
* let the user work it out.. We take reponsibility for freeing the
* xs when the user returns. (and restarting the device's queue).
*/
if ((xs->flags & SCSI_USER) != 0) {
SC_DEBUG(sc_link, SDEV_DB3, ("calling user done()\n"));
scsi_user_done(xs); /* to take a copy of the sense etc. */
SC_DEBUG(sc_link, SDEV_DB3, ("returned from user done()\n "));
scsi_free_xs(xs, SCSI_NOSLEEP); /* restarts queue too */
SC_DEBUG(sc_link, SDEV_DB3, ("returning to adapter\n"));
return;
}
/*
* If the device has it's own done routine, call it first.
* If it returns a legit error value, return that, otherwise
* it wants us to continue with normal processing.
*/
if (sc_link->device->done) {
SC_DEBUG(sc_link, SDEV_DB2, ("calling private done()\n"));
error = (*sc_link->device->done) (xs);
if (error == EJUSTRETURN)
goto done;
SC_DEBUG(sc_link, SDEV_DB3, ("continuing with generic done()\n"));
}
if (xs->bp == NULL) {
/*
* if it's a normal upper level request, then ask
* the upper level code to handle error checking
* rather than doing it here at interrupt time
*/
wakeup(xs);
return;
}
/*
* Go and handle errors now.
* If it returns ERESTART then we should RETRY
*/
retry:
if (sc_err1(xs, 1) == ERESTART) {
switch ((*(sc_link->adapter->scsi_cmd)) (xs)) {
case SUCCESSFULLY_QUEUED:
return;
case TRY_AGAIN_LATER:
xs->error = XS_BUSY;
case COMPLETE:
goto retry;
}
}
done:
scsi_free_xs(xs, SCSI_NOSLEEP);
}
int
scsi_execute_xs(xs)
struct scsi_xfer *xs;
{
int error;
int s;
xs->flags &= ~ITSDONE;
xs->error = XS_NOERROR;
xs->resid = xs->datalen;
retry:
/*
* Do the transfer. If we are polling we will return:
* COMPLETE, Was poll, and scsi_done has been called
* TRY_AGAIN_LATER, Adapter short resources, try again
*
* if under full steam (interrupts) it will return:
* SUCCESSFULLY_QUEUED, will do a wakeup when complete
* TRY_AGAIN_LATER, (as for polling)
* After the wakeup, we must still check if it succeeded
*
* If we have a bp however, all the error proccessing
* and the buffer code both expect us to return straight
* to them, so as soon as the command is queued, return
*/
switch ((*(xs->sc_link->adapter->scsi_cmd)) (xs)) {
case SUCCESSFULLY_QUEUED:
if (xs->bp)
return EJUSTRETURN;
s = splbio();
while ((xs->flags & ITSDONE) == 0)
tsleep(xs, PRIBIO + 1, "scsi_scsi_cmd", 0);
splx(s);
case COMPLETE: /* Polling command completed ok */
if (xs->bp)
return EJUSTRETURN;
doit:
SC_DEBUG(xs->sc_link, SDEV_DB3, ("back in cmd()\n"));
if ((error = sc_err1(xs, 0)) != ERESTART)
return error;
goto retry;
case TRY_AGAIN_LATER: /* adapter resource shortage */
xs->error = XS_BUSY;
goto doit;
default:
panic("scsi_execute_xs: invalid return code");
}
#ifdef DIAGNOSTIC
panic("scsi_execute_xs: impossible");
#endif
}
/*
* ask the scsi driver to perform a command for us.
* tell it where to read/write the data, and how
* long the data is supposed to be. If we have a buf
* to associate with the transfer, we need that too.
*/
int
scsi_scsi_cmd(sc_link, scsi_cmd, cmdlen, data_addr, datalen,
retries, timeout, bp, flags)
struct scsi_link *sc_link;
struct scsi_generic *scsi_cmd;
int cmdlen;
u_char *data_addr;
int datalen;
int retries;
int timeout;
struct buf *bp;
int flags;
{
struct scsi_xfer *xs;
int error;
SC_DEBUG(sc_link, SDEV_DB2, ("scsi_cmd\n"));
#ifdef DIAGNOSTIC
if (bp != 0 && (flags & SCSI_NOSLEEP) == 0)
panic("scsi_scsi_cmd: buffer without nosleep");
#endif
if ((xs = scsi_make_xs(sc_link, scsi_cmd, cmdlen, data_addr, datalen,
retries, timeout, bp, flags)) == NULL)
return ENOMEM;
if ((error = scsi_execute_xs(xs)) == EJUSTRETURN)
return 0;
/*
* we have finished with the xfer stuct, free it and
* check if anyone else needs to be started up.
*/
scsi_free_xs(xs, flags);
return error;
}
int
sc_err1(xs, async)
struct scsi_xfer *xs;
int async;
{
int error;
SC_DEBUG(xs->sc_link, SDEV_DB3, ("sc_err1,err = 0x%x \n", xs->error));
/*
* If it has a buf, we might be working with
* a request from the buffer cache or some other
* piece of code that requires us to process
* errors at inetrrupt time. We have probably
* been called by scsi_done()
*/
switch (xs->error) {
case XS_NOERROR: /* nearly always hit this one */
error = 0;
break;
case XS_SENSE:
if ((error = scsi_interpret_sense(xs)) == ERESTART)
goto retry;
SC_DEBUG(xs->sc_link, SDEV_DB3,
("scsi_interpret_sense returned %d\n", error));
break;
case XS_BUSY:
if (xs->retries) {
if ((xs->flags & SCSI_POLL) != 0)
delay(1000000);
else if ((xs->flags & SCSI_NOSLEEP) == 0)
tsleep(&lbolt, PRIBIO, "scbusy", 0);
else
#if 0
timeout(scsi_requeue, xs, hz);
#else
goto lose;
#endif
}
case XS_TIMEOUT:
retry:
if (xs->retries--) {
xs->error = XS_NOERROR;
xs->flags &= ~ITSDONE;
return ERESTART;
}
case XS_DRIVER_STUFFUP:
lose:
error = EIO;
break;
case XS_SELTIMEOUT:
/* XXX Disable device? */
error = EIO;
break;
default:
sc_print_addr(xs->sc_link);
printf("unknown error category from scsi driver\n");
error = EIO;
break;
}
scsi_error(xs, error);
return error;
}
void
scsi_error(xs, error)
struct scsi_xfer *xs;
int error;
{
struct buf *bp = xs->bp;
if (bp) {
if (error) {
bp->b_error = error;
bp->b_flags |= B_ERROR;
bp->b_resid = bp->b_bcount;
} else {
bp->b_error = 0;
bp->b_resid = xs->resid;
}
biodone(bp);
}
}
/*
* Look at the returned sense and act on the error, determining
* the unix error number to pass back. (0 = report no error)
*
* THIS IS THE DEFAULT ERROR HANDLER
*/
int
scsi_interpret_sense(xs)
struct scsi_xfer *xs;
{
struct scsi_sense_data *sense;
struct scsi_link *sc_link = xs->sc_link;
u_int8_t key;
u_int32_t info;
int error;
static char *error_mes[] = {
"soft error (corrected)",
"not ready", "medium error",
"non-media hardware failure", "illegal request",
"unit attention", "readonly device",
"no data found", "vendor unique",
"copy aborted", "command aborted",
"search returned equal", "volume overflow",
"verify miscompare", "unknown error key"
};
sense = &xs->sense;
#ifdef SCSIDEBUG
if ((sc_link->flags & SDEV_DB1) != 0) {
int count;
printf("code%x valid%x ",
sense->error_code & SSD_ERRCODE,
sense->error_code & SSD_ERRCODE_VALID ? 1 : 0);
printf("seg%x key%x ili%x eom%x fmark%x\n",
sense->extended_segment,
sense->extended_flags & SSD_KEY,
sense->extended_flags & SSD_ILI ? 1 : 0,
sense->extended_flags & SSD_EOM ? 1 : 0,
sense->extended_flags & SSD_FILEMARK ? 1 : 0);
printf("info: %x %x %x %x followed by %d extra bytes\n",
sense->extended_info[0],
sense->extended_info[1],
sense->extended_info[2],
sense->extended_info[3],
sense->extended_extra_len);
printf("extra: ");
for (count = 0; count < sense->extended_extra_len; count++)
printf("%x ", sense->extended_extra_bytes[count]);
printf("\n");
}
#endif /*SCSIDEBUG */
/*
* If the device has it's own error handler, call it first.
* If it returns a legit error value, return that, otherwise
* it wants us to continue with normal error processing.
*/
if (sc_link->device->err_handler) {
SC_DEBUG(sc_link, SDEV_DB2, ("calling private err_handler()\n"));
error = (*sc_link->device->err_handler) (xs);
if (error != -1)
return error; /* error >= 0 better ? */
}
/* otherwise use the default */
switch (sense->error_code & SSD_ERRCODE) {
/*
* If it's code 70, use the extended stuff and interpret the key
*/
case 0x71: /* delayed error */
sc_print_addr(sc_link);
key = sense->extended_flags & SSD_KEY;
printf(" DELAYED ERROR, key = 0x%x\n", key);
case 0x70:
if ((sense->error_code & SSD_ERRCODE_VALID) != 0) {
bcopy(sense->extended_info, &info, sizeof info);
info = ntohl(info);
} else
info = 0;
key = sense->extended_flags & SSD_KEY;
switch (key) {
case 0x0: /* NO SENSE */
case 0x1: /* RECOVERED ERROR */
if (xs->resid == xs->datalen)
xs->resid = 0; /* not short read */
case 0xc: /* EQUAL */
error = 0;
break;
case 0x2: /* NOT READY */
if ((sc_link->flags & SDEV_REMOVABLE) != 0)
sc_link->flags &= ~SDEV_MEDIA_LOADED;
if ((xs->flags & SCSI_IGNORE_NOT_READY) != 0)
return 0;
if ((xs->flags & SCSI_SILENT) != 0)
return EIO;
error = EIO;
break;
case 0x5: /* ILLEGAL REQUEST */
if ((xs->flags & SCSI_IGNORE_ILLEGAL_REQUEST) != 0)
return 0;
error = EINVAL;
break;
case 0x6: /* UNIT ATTENTION */
if ((sc_link->flags & SDEV_REMOVABLE) != 0)
sc_link->flags &= ~SDEV_MEDIA_LOADED;
if ((xs->flags & SCSI_IGNORE_MEDIA_CHANGE) != 0 ||
/* XXX Should reupload any transient state. */
(sc_link->flags & SDEV_REMOVABLE) == 0)
return ERESTART;
if ((xs->flags & SCSI_SILENT) != 0)
return EIO;
error = EIO;
break;
case 0x7: /* DATA PROTECT */
error = EACCES;
break;
case 0x8: /* BLANK CHECK */
error = 0;
break;
case 0xd: /* VOLUME OVERFLOW */
error = ENOSPC;
break;
default:
error = EIO;
break;
}
if (key) {
sc_print_addr(sc_link);
printf("%s", error_mes[key - 1]);
if ((sense->error_code & SSD_ERRCODE_VALID) != 0) {
switch (key) {
case 0x2: /* NOT READY */
case 0x5: /* ILLEGAL REQUEST */
case 0x6: /* UNIT ATTENTION */
case 0x7: /* DATA PROTECT */
break;
case 0x8: /* BLANK CHECK */
printf(", requested size: %d (decimal)",
info);
break;
default:
printf(", info = %d (decimal)", info);
}
}
if (sense->extended_extra_len != 0) {
int n;
printf(", data =");
for (n = 0; n < sense->extended_extra_len; n++)
printf(" %02x", sense->extended_extra_bytes[n]);
}
printf("\n");
}
return error;
/*
* Not code 70, just report it
*/
default:
sc_print_addr(sc_link);
printf("error code %d",
sense->error_code & SSD_ERRCODE);
if ((sense->error_code & SSD_ERRCODE_VALID) != 0) {
printf(" at block no. %d (decimal)",
(sense->XXX_unextended_blockhi << 16) +
(sense->XXX_unextended_blockmed << 8) +
(sense->XXX_unextended_blocklow));
}
printf("\n");
return EIO;
}
}
/*
* Utility routines often used in SCSI stuff
*/
/*
* convert a physical address to 3 bytes,
* MSB at the lowest address,
* LSB at the highest.
*/
void
lto3b(val, bytes)
u_int32_t val;
u_int8_t *bytes;
{
*bytes++ = (val >> 16) & 0xff;
*bytes++ = (val >> 8) & 0xff;
*bytes = val & 0xff;
}
/*
* The reverse of lto3b
*/
u_int32_t
_3btol(bytes)
u_int8_t *bytes;
{
u_int32_t rc;
rc = (*bytes++ << 16);
rc += (*bytes++ << 8);
rc += *bytes;
return (rc);
}
/*
* Print out the scsi_link structure's address info.
*/
void
sc_print_addr(sc_link)
struct scsi_link *sc_link;
{
printf("%s(%s:%d:%d): ",
sc_link->device_softc ?
((struct device *)sc_link->device_softc)->dv_xname : "probe",
((struct device *)sc_link->adapter_softc)->dv_xname,
sc_link->target, sc_link->lun);
}
#ifdef SCSIDEBUG
/*
* Given a scsi_xfer, dump the request, in all it's glory
*/
void
show_scsi_xs(xs)
struct scsi_xfer *xs;
{
printf("xs(0x%x): ", xs);
printf("flg(0x%x)", xs->flags);
printf("sc_link(0x%x)", xs->sc_link);
printf("retr(0x%x)", xs->retries);
printf("timo(0x%x)", xs->timeout);
printf("cmd(0x%x)", xs->cmd);
printf("len(0x%x)", xs->cmdlen);
printf("data(0x%x)", xs->data);
printf("len(0x%x)", xs->datalen);
printf("res(0x%x)", xs->resid);
printf("err(0x%x)", xs->error);
printf("bp(0x%x)", xs->bp);
show_scsi_cmd(xs);
}
void
show_scsi_cmd(xs)
struct scsi_xfer *xs;
{
u_char *b = (u_char *) xs->cmd;
int i = 0;
sc_print_addr(xs->sc_link);
printf("command: ");
if ((xs->flags & SCSI_RESET) == 0) {
while (i < xs->cmdlen) {
if (i)
printf(",");
printf("%x", b[i++]);
}
printf("-[%d bytes]\n", xs->datalen);
if (xs->datalen)
show_mem(xs->data, min(64, xs->datalen));
} else
printf("-RESET-\n");
}
void
show_mem(address, num)
u_char *address;
int num;
{
int x;
printf("------------------------------");
for (x = 0; x < num; x++) {
if ((x % 16) == 0)
printf("\n%03d: ", x);
printf("%02x ", *address++);
}
printf("\n------------------------------\n");
}
#endif /*SCSIDEBUG */
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