2 * Copyright (c) 2007 Scott Long
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions, and the following disclaimer,
10 * without modification, immediately at the beginning of the file.
11 * 2. The name of the author may not be used to endorse or promote products
12 * derived from this software without specific prior written permission.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
18 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * scsi_sg peripheral driver. This driver is meant to implement the Linux
29 * SG passthrough interface for SCSI.
32 #include <sys/cdefs.h>
33 __FBSDID("$FreeBSD$");
35 #include <sys/param.h>
36 #include <sys/systm.h>
37 #include <sys/kernel.h>
38 #include <sys/types.h>
40 #include <sys/malloc.h>
41 #include <sys/fcntl.h>
42 #include <sys/ioccom.h>
44 #include <sys/errno.h>
45 #include <sys/devicestat.h>
50 #include <cam/cam_ccb.h>
51 #include <cam/cam_periph.h>
52 #include <cam/cam_queue.h>
53 #include <cam/cam_xpt_periph.h>
54 #include <cam/cam_debug.h>
55 #include <cam/cam_sim.h>
57 #include <cam/scsi/scsi_all.h>
58 #include <cam/scsi/scsi_message.h>
59 #include <cam/scsi/scsi_sg.h>
61 #include <compat/linux/linux_ioctl.h>
65 SG_FLAG_LOCKED = 0x02,
66 SG_FLAG_INVALID = 0x04
84 #define ccb_type ppriv_field0
85 #define ccb_rdwr ppriv_ptr1
88 TAILQ_ENTRY(sg_rdwr) rdwr_link;
96 struct sg_io_hdr io_hdr;
103 struct devstat *device_stats;
104 TAILQ_HEAD(, sg_rdwr) rdwr_done;
112 static d_open_t sgopen;
113 static d_close_t sgclose;
114 static d_ioctl_t sgioctl;
115 static d_write_t sgwrite;
116 static d_read_t sgread;
118 static periph_init_t sginit;
119 static periph_ctor_t sgregister;
120 static periph_oninv_t sgoninvalidate;
121 static periph_dtor_t sgcleanup;
122 static periph_start_t sgstart;
123 static void sgasync(void *callback_arg, uint32_t code,
124 struct cam_path *path, void *arg);
125 static void sgdone(struct cam_periph *periph, union ccb *done_ccb);
126 static int sgsendccb(struct cam_periph *periph, union ccb *ccb);
127 static int sgsendrdwr(struct cam_periph *periph, union ccb *ccb);
128 static int sgerror(union ccb *ccb, uint32_t cam_flags,
129 uint32_t sense_flags);
130 static void sg_scsiio_status(struct ccb_scsiio *csio,
131 u_short *hoststat, u_short *drvstat);
133 static int scsi_group_len(u_char cmd);
135 static struct periph_driver sgdriver =
138 TAILQ_HEAD_INITIALIZER(sgdriver.units), /* gen */ 0
140 PERIPHDRIVER_DECLARE(sg, sgdriver);
142 static struct cdevsw sg_cdevsw = {
143 .d_version = D_VERSION,
144 .d_flags = D_NEEDGIANT,
153 static int sg_version = 30125;
161 * Install a global async callback. This callback will receive aync
162 * callbacks like "new device found".
164 status = xpt_register_async(AC_FOUND_DEVICE, sgasync, NULL, NULL);
166 if (status != CAM_REQ_CMP) {
167 printf("sg: Failed to attach master async callbac "
168 "due to status 0x%x!\n", status);
173 sgoninvalidate(struct cam_periph *periph)
175 struct sg_softc *softc;
177 softc = (struct sg_softc *)periph->softc;
180 * Deregister any async callbacks.
182 xpt_register_async(0, sgasync, periph, periph->path);
184 softc->flags |= SG_FLAG_INVALID;
187 * XXX Return all queued I/O with ENXIO.
188 * XXX Handle any transactions queued to the card
189 * with XPT_ABORT_CCB.
193 xpt_print(periph->path, "lost device\n");
198 sgcleanup(struct cam_periph *periph)
200 struct sg_softc *softc;
202 softc = (struct sg_softc *)periph->softc;
204 xpt_print(periph->path, "removing device entry\n");
205 devstat_remove_entry(softc->device_stats);
206 cam_periph_unlock(periph);
207 destroy_dev(softc->dev);
208 cam_periph_lock(periph);
209 free(softc, M_DEVBUF);
213 sgasync(void *callback_arg, uint32_t code, struct cam_path *path, void *arg)
215 struct cam_periph *periph;
217 periph = (struct cam_periph *)callback_arg;
220 case AC_FOUND_DEVICE:
222 struct ccb_getdev *cgd;
225 cgd = (struct ccb_getdev *)arg;
229 if (cgd->protocol != PROTO_SCSI)
233 * Allocate a peripheral instance for this device and
234 * start the probe process.
236 status = cam_periph_alloc(sgregister, sgoninvalidate,
237 sgcleanup, sgstart, "sg",
238 CAM_PERIPH_BIO, cgd->ccb_h.path,
239 sgasync, AC_FOUND_DEVICE, cgd);
240 if ((status != CAM_REQ_CMP) && (status != CAM_REQ_INPROG)) {
241 const struct cam_status_entry *entry;
243 entry = cam_fetch_status_entry(status);
244 printf("sgasync: Unable to attach new device "
245 "due to status %#x: %s\n", status, entry ?
246 entry->status_text : "Unknown");
251 cam_periph_async(periph, code, path, arg);
257 sgregister(struct cam_periph *periph, void *arg)
259 struct sg_softc *softc;
260 struct ccb_getdev *cgd;
263 cgd = (struct ccb_getdev *)arg;
264 if (periph == NULL) {
265 printf("sgregister: periph was NULL!!\n");
266 return (CAM_REQ_CMP_ERR);
270 printf("sgregister: no getdev CCB, can't register device\n");
271 return (CAM_REQ_CMP_ERR);
274 softc = malloc(sizeof(*softc), M_DEVBUF, M_ZERO | M_NOWAIT);
276 printf("sgregister: Unable to allocate softc\n");
277 return (CAM_REQ_CMP_ERR);
280 softc->state = SG_STATE_NORMAL;
281 softc->pd_type = SID_TYPE(&cgd->inq_data);
282 softc->sg_timeout = SG_DEFAULT_TIMEOUT / SG_DEFAULT_HZ * hz;
283 softc->sg_user_timeout = SG_DEFAULT_TIMEOUT;
284 TAILQ_INIT(&softc->rdwr_done);
285 periph->softc = softc;
288 * We pass in 0 for all blocksize, since we don't know what the
289 * blocksize of the device is, if it even has a blocksize.
291 cam_periph_unlock(periph);
292 no_tags = (cgd->inq_data.flags & SID_CmdQue) == 0;
293 softc->device_stats = devstat_new_entry("sg",
294 periph->unit_number, 0,
296 | (no_tags ? DEVSTAT_NO_ORDERED_TAGS : 0),
298 DEVSTAT_TYPE_IF_SCSI |
300 DEVSTAT_PRIORITY_PASS);
302 /* Register the device */
303 softc->dev = make_dev(&sg_cdevsw, periph->unit_number,
304 UID_ROOT, GID_OPERATOR, 0600, "%s%d",
305 periph->periph_name, periph->unit_number);
306 (void)make_dev_alias(softc->dev, "sg%c", 'a' + periph->unit_number);
307 cam_periph_lock(periph);
308 softc->dev->si_drv1 = periph;
311 * Add as async callback so that we get
312 * notified if this device goes away.
314 xpt_register_async(AC_LOST_DEVICE, sgasync, periph, periph->path);
317 xpt_announce_periph(periph, NULL);
319 return (CAM_REQ_CMP);
323 sgstart(struct cam_periph *periph, union ccb *start_ccb)
325 struct sg_softc *softc;
327 softc = (struct sg_softc *)periph->softc;
329 switch (softc->state) {
330 case SG_STATE_NORMAL:
331 start_ccb->ccb_h.ccb_type = SG_CCB_WAITING;
332 SLIST_INSERT_HEAD(&periph->ccb_list, &start_ccb->ccb_h,
334 periph->immediate_priority = CAM_PRIORITY_NONE;
335 wakeup(&periph->ccb_list);
341 sgdone(struct cam_periph *periph, union ccb *done_ccb)
343 struct sg_softc *softc;
344 struct ccb_scsiio *csio;
346 softc = (struct sg_softc *)periph->softc;
347 csio = &done_ccb->csio;
348 switch (csio->ccb_h.ccb_type) {
350 /* Caller will release the CCB */
351 wakeup(&done_ccb->ccb_h.cbfcnp);
355 struct sg_rdwr *rdwr;
358 devstat_end_transaction(softc->device_stats,
360 csio->tag_action & 0xf,
361 ((csio->ccb_h.flags & CAM_DIR_MASK) ==
362 CAM_DIR_NONE) ? DEVSTAT_NO_DATA :
363 (csio->ccb_h.flags & CAM_DIR_OUT) ?
364 DEVSTAT_WRITE : DEVSTAT_READ,
367 rdwr = done_ccb->ccb_h.ccb_rdwr;
369 rdwr->state = SG_RDWR_DONE;
374 panic("unknown sg CCB type");
379 sgopen(struct cdev *dev, int flags, int fmt, struct thread *td)
381 struct cam_periph *periph;
382 struct sg_softc *softc;
385 periph = (struct cam_periph *)dev->si_drv1;
390 * Don't allow access when we're running at a high securelevel.
392 error = securelevel_gt(td->td_ucred, 1);
396 cam_periph_lock(periph);
398 softc = (struct sg_softc *)periph->softc;
399 if (softc->flags & SG_FLAG_INVALID) {
400 cam_periph_unlock(periph);
404 if ((softc->flags & SG_FLAG_OPEN) == 0) {
405 softc->flags |= SG_FLAG_OPEN;
406 cam_periph_unlock(periph);
408 /* Device closes aren't symmetrical, fix up the refcount. */
409 cam_periph_unlock(periph);
410 cam_periph_release(periph);
417 sgclose(struct cdev *dev, int flag, int fmt, struct thread *td)
419 struct cam_periph *periph;
420 struct sg_softc *softc;
422 periph = (struct cam_periph *)dev->si_drv1;
426 cam_periph_lock(periph);
428 softc = (struct sg_softc *)periph->softc;
429 softc->flags &= ~SG_FLAG_OPEN;
431 cam_periph_unlock(periph);
432 cam_periph_release(periph);
438 sgioctl(struct cdev *dev, u_long cmd, caddr_t arg, int flag, struct thread *td)
441 struct ccb_scsiio *csio;
442 struct cam_periph *periph;
443 struct sg_softc *softc;
444 struct sg_io_hdr req;
447 periph = (struct cam_periph *)dev->si_drv1;
451 cam_periph_lock(periph);
453 softc = (struct sg_softc *)periph->softc;
457 case LINUX_SCSI_GET_BUS_NUMBER: {
460 busno = xpt_path_path_id(periph->path);
461 error = copyout(&busno, arg, sizeof(busno));
464 case LINUX_SCSI_GET_IDLUN: {
465 struct scsi_idlun idlun;
468 idlun.dev_id = xpt_path_target_id(periph->path);
469 sim = xpt_path_sim(periph->path);
470 idlun.host_unique_id = sim->unit_number;
471 error = copyout(&idlun, arg, sizeof(idlun));
474 case SG_GET_VERSION_NUM:
475 case LINUX_SG_GET_VERSION_NUM:
476 error = copyout(&sg_version, arg, sizeof(sg_version));
479 case LINUX_SG_SET_TIMEOUT: {
482 error = copyin(arg, &user_timeout, sizeof(u_int));
484 softc->sg_user_timeout = user_timeout;
485 softc->sg_timeout = user_timeout / SG_DEFAULT_HZ * hz;
490 case LINUX_SG_GET_TIMEOUT:
492 * The value is returned directly to the syscall.
494 td->td_retval[0] = softc->sg_user_timeout;
499 error = copyin(arg, &req, sizeof(req));
503 if (req.cmd_len > IOCDBLEN) {
508 if (req.iovec_count != 0) {
513 ccb = cam_periph_getccb(periph, /*priority*/5);
516 error = copyin(req.cmdp, &csio->cdb_io.cdb_bytes,
519 xpt_release_ccb(ccb);
523 switch(req.dxfer_direction) {
524 case SG_DXFER_TO_DEV:
527 case SG_DXFER_FROM_DEV:
530 case SG_DXFER_TO_FROM_DEV:
531 dir = CAM_DIR_IN | CAM_DIR_OUT;
550 error = sgsendccb(periph, ccb);
552 req.host_status = DID_ERROR;
553 req.driver_status = DRIVER_INVALID;
554 xpt_release_ccb(ccb);
558 req.status = csio->scsi_status;
559 req.masked_status = (csio->scsi_status >> 1) & 0x7f;
560 sg_scsiio_status(csio, &req.host_status, &req.driver_status);
561 req.resid = csio->resid;
562 req.duration = csio->ccb_h.timeout;
565 error = copyout(&req, arg, sizeof(req));
566 if ((error == 0) && (csio->ccb_h.status & CAM_AUTOSNS_VALID)
567 && (req.sbp != NULL)) {
568 req.sb_len_wr = req.mx_sb_len - csio->sense_resid;
569 error = copyout(&csio->sense_data, req.sbp,
573 xpt_release_ccb(ccb);
576 case SG_GET_RESERVED_SIZE:
577 case LINUX_SG_GET_RESERVED_SIZE: {
580 error = copyout(&size, arg, sizeof(size));
585 case LINUX_SG_GET_SCSI_ID:
587 struct sg_scsi_id id;
589 id.host_no = 0; /* XXX */
590 id.channel = xpt_path_path_id(periph->path);
591 id.scsi_id = xpt_path_target_id(periph->path);
592 id.lun = xpt_path_lun_id(periph->path);
593 id.scsi_type = softc->pd_type;
594 id.h_cmd_per_lun = 1;
595 id.d_queue_depth = 1;
599 error = copyout(&id, arg, sizeof(id));
603 case SG_EMULATED_HOST:
604 case SG_SET_TRANSFORM:
605 case SG_GET_TRANSFORM:
606 case SG_GET_NUM_WAITING:
608 case SG_GET_REQUEST_TABLE:
609 case SG_SET_KEEP_ORPHAN:
610 case SG_GET_KEEP_ORPHAN:
611 case SG_GET_ACCESS_COUNT:
612 case SG_SET_FORCE_LOW_DMA:
614 case SG_GET_SG_TABLESIZE:
615 case SG_SET_FORCE_PACK_ID:
617 case SG_SET_RESERVED_SIZE:
618 case SG_GET_COMMAND_Q:
619 case SG_SET_COMMAND_Q:
621 case SG_NEXT_CMD_LEN:
622 case LINUX_SG_EMULATED_HOST:
623 case LINUX_SG_SET_TRANSFORM:
624 case LINUX_SG_GET_TRANSFORM:
625 case LINUX_SG_GET_NUM_WAITING:
626 case LINUX_SG_SCSI_RESET:
627 case LINUX_SG_GET_REQUEST_TABLE:
628 case LINUX_SG_SET_KEEP_ORPHAN:
629 case LINUX_SG_GET_KEEP_ORPHAN:
630 case LINUX_SG_GET_ACCESS_COUNT:
631 case LINUX_SG_SET_FORCE_LOW_DMA:
632 case LINUX_SG_GET_LOW_DMA:
633 case LINUX_SG_GET_SG_TABLESIZE:
634 case LINUX_SG_SET_FORCE_PACK_ID:
635 case LINUX_SG_GET_PACK_ID:
636 case LINUX_SG_SET_RESERVED_SIZE:
637 case LINUX_SG_GET_COMMAND_Q:
638 case LINUX_SG_SET_COMMAND_Q:
639 case LINUX_SG_SET_DEBUG:
640 case LINUX_SG_NEXT_CMD_LEN:
643 printf("sgioctl: rejecting cmd 0x%lx\n", cmd);
649 cam_periph_unlock(periph);
654 sgwrite(struct cdev *dev, struct uio *uio, int ioflag)
657 struct cam_periph *periph;
658 struct ccb_scsiio *csio;
660 struct sg_header *hdr;
661 struct sg_rdwr *rdwr;
664 int error = 0, cdb_len, buf_len, dir;
666 periph = dev->si_drv1;
667 rdwr = malloc(sizeof(*rdwr), M_DEVBUF, M_WAITOK | M_ZERO);
668 hdr = &rdwr->hdr.hdr;
670 /* Copy in the header block and sanity check it */
671 if (uio->uio_resid < sizeof(*hdr)) {
675 error = uiomove(hdr, sizeof(*hdr), uio);
679 ccb = xpt_alloc_ccb();
687 * Copy in the CDB block. The designers of the interface didn't
688 * bother to provide a size for this in the header, so we have to
689 * figure it out ourselves.
691 if (uio->uio_resid < 1)
693 error = uiomove(&cdb_cmd, 1, uio);
696 if (hdr->twelve_byte)
699 cdb_len = scsi_group_len(cdb_cmd);
701 * We've already read the first byte of the CDB and advanced the uio
702 * pointer. Just read the rest.
704 csio->cdb_io.cdb_bytes[0] = cdb_cmd;
705 error = uiomove(&csio->cdb_io.cdb_bytes[1], cdb_len - 1, uio);
710 * Now set up the data block. Again, the designers didn't bother
711 * to make this reliable.
713 buf_len = uio->uio_resid;
715 buf = malloc(buf_len, M_DEVBUF, M_WAITOK | M_ZERO);
716 error = uiomove(buf, buf_len, uio);
720 } else if (hdr->reply_len != 0) {
721 buf = malloc(hdr->reply_len, M_DEVBUF, M_WAITOK | M_ZERO);
722 buf_len = hdr->reply_len;
730 cam_periph_lock(periph);
732 xpt_setup_ccb(&ccb->ccb_h, periph->path, /*priority*/5);
745 * Send off the command and hope that it works. This path does not
746 * go through sgstart because the I/O is supposed to be asynchronous.
749 rdwr->buf_len = buf_len;
750 rdwr->tag = hdr->pack_id;
752 rdwr->state = SG_RDWR_INPROG;
753 ccb->ccb_h.ccb_rdwr = rdwr;
754 ccb->ccb_h.ccb_type = SG_CCB_RDWR_IO;
755 TAILQ_INSERT_TAIL(&sc->rdwr_done, rdwr, rdwr_link);
756 error = sgsendrdwr(periph, ccb);
757 cam_periph_unlock(periph);
765 free(rdwr, M_DEVBUF);
770 sgread(struct cdev *dev, struct uio *uio, int ioflag)
772 struct ccb_scsiio *csio;
773 struct cam_periph *periph;
775 struct sg_header *hdr;
776 struct sg_rdwr *rdwr;
777 u_short hstat, dstat;
778 int error, pack_len, reply_len, pack_id;
780 periph = dev->si_drv1;
782 /* XXX The pack len field needs to be updated and written out instead
783 * of discarded. Not sure how to do that.
785 uio->uio_rw = UIO_WRITE;
786 if ((error = uiomove(&pack_len, 4, uio)) != 0)
788 if ((error = uiomove(&reply_len, 4, uio)) != 0)
790 if ((error = uiomove(&pack_id, 4, uio)) != 0)
792 uio->uio_rw = UIO_READ;
794 cam_periph_lock(periph);
797 TAILQ_FOREACH(rdwr, &sc->rdwr_done, rdwr_link) {
798 if (rdwr->tag == pack_id)
801 if ((rdwr == NULL) || (rdwr->state != SG_RDWR_DONE)) {
802 if (msleep(rdwr, periph->sim->mtx, PCATCH, "sgread", 0) == ERESTART)
806 TAILQ_REMOVE(&sc->rdwr_done, rdwr, rdwr_link);
807 cam_periph_unlock(periph);
809 hdr = &rdwr->hdr.hdr;
810 csio = &rdwr->ccb->csio;
811 sg_scsiio_status(csio, &hstat, &dstat);
812 hdr->host_status = hstat;
813 hdr->driver_status = dstat;
814 hdr->target_status = csio->scsi_status >> 1;
818 case DID_PASSTHROUGH:
838 if (dstat == DRIVER_SENSE) {
839 bcopy(&csio->sense_data, hdr->sense_buffer,
840 min(csio->sense_len, SG_MAX_SENSE));
842 scsi_sense_print(csio);
846 error = uiomove(&hdr->result, sizeof(*hdr) -
847 offsetof(struct sg_header, result), uio);
848 if ((error == 0) && (hdr->result == 0))
849 error = uiomove(rdwr->buf, rdwr->buf_len, uio);
851 cam_periph_lock(periph);
852 xpt_free_ccb(rdwr->ccb);
853 cam_periph_unlock(periph);
854 free(rdwr->buf, M_DEVBUF);
855 free(rdwr, M_DEVBUF);
860 sgsendccb(struct cam_periph *periph, union ccb *ccb)
862 struct sg_softc *softc;
863 struct cam_periph_map_info mapinfo;
864 int error, need_unmap = 0;
866 softc = periph->softc;
867 if (((ccb->ccb_h.flags & CAM_DIR_MASK) != CAM_DIR_NONE)
868 && (ccb->csio.data_ptr != NULL)) {
869 bzero(&mapinfo, sizeof(mapinfo));
872 * cam_periph_mapmem calls into proc and vm functions that can
873 * sleep as well as trigger I/O, so we can't hold the lock.
874 * Dropping it here is reasonably safe.
876 cam_periph_unlock(periph);
877 error = cam_periph_mapmem(ccb, &mapinfo);
878 cam_periph_lock(periph);
884 error = cam_periph_runccb(ccb,
888 softc->device_stats);
891 cam_periph_unmapmem(ccb, &mapinfo);
897 sgsendrdwr(struct cam_periph *periph, union ccb *ccb)
899 struct sg_softc *softc;
901 softc = periph->softc;
902 devstat_start_transaction(softc->device_stats, NULL);
908 sgerror(union ccb *ccb, uint32_t cam_flags, uint32_t sense_flags)
910 struct cam_periph *periph;
911 struct sg_softc *softc;
913 periph = xpt_path_periph(ccb->ccb_h.path);
914 softc = (struct sg_softc *)periph->softc;
916 return (cam_periph_error(ccb, cam_flags, sense_flags,
921 sg_scsiio_status(struct ccb_scsiio *csio, u_short *hoststat, u_short *drvstat)
925 status = csio->ccb_h.status;
927 switch (status & CAM_STATUS_MASK) {
932 case CAM_REQ_CMP_ERR:
933 *hoststat = DID_ERROR;
936 case CAM_REQ_ABORTED:
937 *hoststat = DID_ABORT;
940 case CAM_REQ_INVALID:
941 *hoststat = DID_ERROR;
942 *drvstat = DRIVER_INVALID;
944 case CAM_DEV_NOT_THERE:
945 *hoststat = DID_BAD_TARGET;
948 case CAM_SEL_TIMEOUT:
949 *hoststat = DID_NO_CONNECT;
952 case CAM_CMD_TIMEOUT:
953 *hoststat = DID_TIME_OUT;
956 case CAM_SCSI_STATUS_ERROR:
957 *hoststat = DID_ERROR;
960 case CAM_SCSI_BUS_RESET:
961 *hoststat = DID_RESET;
964 case CAM_UNCOR_PARITY:
965 *hoststat = DID_PARITY;
969 *hoststat = DID_BUS_BUSY;
973 *hoststat = DID_ERROR;
974 *drvstat = DRIVER_ERROR;
977 if (status & CAM_AUTOSNS_VALID)
978 *drvstat = DRIVER_SENSE;
982 scsi_group_len(u_char cmd)
984 int len[] = {6, 10, 10, 12, 12, 12, 10, 10};
987 group = (cmd >> 5) & 0x7;