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;
230 * Allocate a peripheral instance for this device and
231 * start the probe process.
233 status = cam_periph_alloc(sgregister, sgoninvalidate,
234 sgcleanup, sgstart, "sg",
235 CAM_PERIPH_BIO, cgd->ccb_h.path,
236 sgasync, AC_FOUND_DEVICE, cgd);
237 if ((status != CAM_REQ_CMP) && (status != CAM_REQ_INPROG)) {
238 const struct cam_status_entry *entry;
240 entry = cam_fetch_status_entry(status);
241 printf("sgasync: Unable to attach new device "
242 "due to status %#x: %s\n", status, entry ?
243 entry->status_text : "Unknown");
248 cam_periph_async(periph, code, path, arg);
254 sgregister(struct cam_periph *periph, void *arg)
256 struct sg_softc *softc;
257 struct ccb_getdev *cgd;
260 cgd = (struct ccb_getdev *)arg;
261 if (periph == NULL) {
262 printf("sgregister: periph was NULL!!\n");
263 return (CAM_REQ_CMP_ERR);
267 printf("sgregister: no getdev CCB, can't register device\n");
268 return (CAM_REQ_CMP_ERR);
271 softc = malloc(sizeof(*softc), M_DEVBUF, M_ZERO | M_NOWAIT);
273 printf("sgregister: Unable to allocate softc\n");
274 return (CAM_REQ_CMP_ERR);
277 softc->state = SG_STATE_NORMAL;
278 softc->pd_type = SID_TYPE(&cgd->inq_data);
279 softc->sg_timeout = SG_DEFAULT_TIMEOUT / SG_DEFAULT_HZ * hz;
280 softc->sg_user_timeout = SG_DEFAULT_TIMEOUT;
281 TAILQ_INIT(&softc->rdwr_done);
282 periph->softc = softc;
285 * We pass in 0 for all blocksize, since we don't know what the
286 * blocksize of the device is, if it even has a blocksize.
288 cam_periph_unlock(periph);
289 no_tags = (cgd->inq_data.flags & SID_CmdQue) == 0;
290 softc->device_stats = devstat_new_entry("sg",
291 unit2minor(periph->unit_number), 0,
293 | (no_tags ? DEVSTAT_NO_ORDERED_TAGS : 0),
295 DEVSTAT_TYPE_IF_SCSI |
297 DEVSTAT_PRIORITY_PASS);
299 /* Register the device */
300 softc->dev = make_dev(&sg_cdevsw, unit2minor(periph->unit_number),
301 UID_ROOT, GID_OPERATOR, 0600, "%s%d",
302 periph->periph_name, periph->unit_number);
303 (void)make_dev_alias(softc->dev, "sg%c", 'a' + periph->unit_number);
304 cam_periph_lock(periph);
305 softc->dev->si_drv1 = periph;
308 * Add as async callback so that we get
309 * notified if this device goes away.
311 xpt_register_async(AC_LOST_DEVICE, sgasync, periph, periph->path);
314 xpt_announce_periph(periph, NULL);
316 return (CAM_REQ_CMP);
320 sgstart(struct cam_periph *periph, union ccb *start_ccb)
322 struct sg_softc *softc;
324 softc = (struct sg_softc *)periph->softc;
326 switch (softc->state) {
327 case SG_STATE_NORMAL:
328 start_ccb->ccb_h.ccb_type = SG_CCB_WAITING;
329 SLIST_INSERT_HEAD(&periph->ccb_list, &start_ccb->ccb_h,
331 periph->immediate_priority = CAM_PRIORITY_NONE;
332 wakeup(&periph->ccb_list);
338 sgdone(struct cam_periph *periph, union ccb *done_ccb)
340 struct sg_softc *softc;
341 struct ccb_scsiio *csio;
343 softc = (struct sg_softc *)periph->softc;
344 csio = &done_ccb->csio;
345 switch (csio->ccb_h.ccb_type) {
347 /* Caller will release the CCB */
348 wakeup(&done_ccb->ccb_h.cbfcnp);
352 struct sg_rdwr *rdwr;
355 devstat_end_transaction(softc->device_stats,
357 csio->tag_action & 0xf,
358 ((csio->ccb_h.flags & CAM_DIR_MASK) ==
359 CAM_DIR_NONE) ? DEVSTAT_NO_DATA :
360 (csio->ccb_h.flags & CAM_DIR_OUT) ?
361 DEVSTAT_WRITE : DEVSTAT_READ,
364 rdwr = done_ccb->ccb_h.ccb_rdwr;
366 rdwr->state = SG_RDWR_DONE;
371 panic("unknown sg CCB type");
376 sgopen(struct cdev *dev, int flags, int fmt, struct thread *td)
378 struct cam_periph *periph;
379 struct sg_softc *softc;
382 periph = (struct cam_periph *)dev->si_drv1;
387 * Don't allow access when we're running at a high securelevel.
389 error = securelevel_gt(td->td_ucred, 1);
393 cam_periph_lock(periph);
395 softc = (struct sg_softc *)periph->softc;
396 if (softc->flags & SG_FLAG_INVALID) {
397 cam_periph_unlock(periph);
401 if ((softc->flags & SG_FLAG_OPEN) == 0) {
402 softc->flags |= SG_FLAG_OPEN;
403 cam_periph_unlock(periph);
405 /* Device closes aren't symmetrical, fix up the refcount. */
406 cam_periph_unlock(periph);
407 cam_periph_release(periph);
414 sgclose(struct cdev *dev, int flag, int fmt, struct thread *td)
416 struct cam_periph *periph;
417 struct sg_softc *softc;
419 periph = (struct cam_periph *)dev->si_drv1;
423 cam_periph_lock(periph);
425 softc = (struct sg_softc *)periph->softc;
426 softc->flags &= ~SG_FLAG_OPEN;
428 cam_periph_unlock(periph);
429 cam_periph_release(periph);
435 sgioctl(struct cdev *dev, u_long cmd, caddr_t arg, int flag, struct thread *td)
438 struct ccb_scsiio *csio;
439 struct cam_periph *periph;
440 struct sg_softc *softc;
441 struct sg_io_hdr req;
444 periph = (struct cam_periph *)dev->si_drv1;
448 cam_periph_lock(periph);
450 softc = (struct sg_softc *)periph->softc;
454 case LINUX_SCSI_GET_BUS_NUMBER: {
457 busno = xpt_path_path_id(periph->path);
458 error = copyout(&busno, arg, sizeof(busno));
461 case LINUX_SCSI_GET_IDLUN: {
462 struct scsi_idlun idlun;
465 idlun.dev_id = xpt_path_target_id(periph->path);
466 sim = xpt_path_sim(periph->path);
467 idlun.host_unique_id = sim->unit_number;
468 error = copyout(&idlun, arg, sizeof(idlun));
471 case SG_GET_VERSION_NUM:
472 case LINUX_SG_GET_VERSION_NUM:
473 error = copyout(&sg_version, arg, sizeof(sg_version));
476 case LINUX_SG_SET_TIMEOUT: {
479 error = copyin(arg, &user_timeout, sizeof(u_int));
481 softc->sg_user_timeout = user_timeout;
482 softc->sg_timeout = user_timeout / SG_DEFAULT_HZ * hz;
487 case LINUX_SG_GET_TIMEOUT:
489 * The value is returned directly to the syscall.
491 td->td_retval[0] = softc->sg_user_timeout;
496 error = copyin(arg, &req, sizeof(req));
500 if (req.cmd_len > IOCDBLEN) {
505 if (req.iovec_count != 0) {
510 ccb = cam_periph_getccb(periph, /*priority*/5);
513 error = copyin(req.cmdp, &csio->cdb_io.cdb_bytes,
516 xpt_release_ccb(ccb);
520 switch(req.dxfer_direction) {
521 case SG_DXFER_TO_DEV:
524 case SG_DXFER_FROM_DEV:
527 case SG_DXFER_TO_FROM_DEV:
528 dir = CAM_DIR_IN | CAM_DIR_OUT;
547 error = sgsendccb(periph, ccb);
549 req.host_status = DID_ERROR;
550 req.driver_status = DRIVER_INVALID;
551 xpt_release_ccb(ccb);
555 req.status = csio->scsi_status;
556 req.masked_status = (csio->scsi_status >> 1) & 0x7f;
557 sg_scsiio_status(csio, &req.host_status, &req.driver_status);
558 req.resid = csio->resid;
559 req.duration = csio->ccb_h.timeout;
562 error = copyout(&req, arg, sizeof(req));
563 if ((error == 0) && (csio->ccb_h.status & CAM_AUTOSNS_VALID)
564 && (req.sbp != NULL)) {
565 req.sb_len_wr = req.mx_sb_len - csio->sense_resid;
566 error = copyout(&csio->sense_data, req.sbp,
570 xpt_release_ccb(ccb);
573 case SG_GET_RESERVED_SIZE:
574 case LINUX_SG_GET_RESERVED_SIZE: {
577 error = copyout(&size, arg, sizeof(size));
582 case LINUX_SG_GET_SCSI_ID:
584 struct sg_scsi_id id;
586 id.host_no = 0; /* XXX */
587 id.channel = xpt_path_path_id(periph->path);
588 id.scsi_id = xpt_path_target_id(periph->path);
589 id.lun = xpt_path_lun_id(periph->path);
590 id.scsi_type = softc->pd_type;
591 id.h_cmd_per_lun = 1;
592 id.d_queue_depth = 1;
596 error = copyout(&id, arg, sizeof(id));
600 case SG_EMULATED_HOST:
601 case SG_SET_TRANSFORM:
602 case SG_GET_TRANSFORM:
603 case SG_GET_NUM_WAITING:
605 case SG_GET_REQUEST_TABLE:
606 case SG_SET_KEEP_ORPHAN:
607 case SG_GET_KEEP_ORPHAN:
608 case SG_GET_ACCESS_COUNT:
609 case SG_SET_FORCE_LOW_DMA:
611 case SG_GET_SG_TABLESIZE:
612 case SG_SET_FORCE_PACK_ID:
614 case SG_SET_RESERVED_SIZE:
615 case SG_GET_COMMAND_Q:
616 case SG_SET_COMMAND_Q:
618 case SG_NEXT_CMD_LEN:
619 case LINUX_SG_EMULATED_HOST:
620 case LINUX_SG_SET_TRANSFORM:
621 case LINUX_SG_GET_TRANSFORM:
622 case LINUX_SG_GET_NUM_WAITING:
623 case LINUX_SG_SCSI_RESET:
624 case LINUX_SG_GET_REQUEST_TABLE:
625 case LINUX_SG_SET_KEEP_ORPHAN:
626 case LINUX_SG_GET_KEEP_ORPHAN:
627 case LINUX_SG_GET_ACCESS_COUNT:
628 case LINUX_SG_SET_FORCE_LOW_DMA:
629 case LINUX_SG_GET_LOW_DMA:
630 case LINUX_SG_GET_SG_TABLESIZE:
631 case LINUX_SG_SET_FORCE_PACK_ID:
632 case LINUX_SG_GET_PACK_ID:
633 case LINUX_SG_SET_RESERVED_SIZE:
634 case LINUX_SG_GET_COMMAND_Q:
635 case LINUX_SG_SET_COMMAND_Q:
636 case LINUX_SG_SET_DEBUG:
637 case LINUX_SG_NEXT_CMD_LEN:
640 printf("sgioctl: rejecting cmd 0x%lx\n", cmd);
646 cam_periph_unlock(periph);
651 sgwrite(struct cdev *dev, struct uio *uio, int ioflag)
654 struct cam_periph *periph;
655 struct ccb_scsiio *csio;
657 struct sg_header *hdr;
658 struct sg_rdwr *rdwr;
661 int error = 0, cdb_len, buf_len, dir;
663 periph = dev->si_drv1;
664 rdwr = malloc(sizeof(*rdwr), M_DEVBUF, M_WAITOK | M_ZERO);
665 hdr = &rdwr->hdr.hdr;
667 /* Copy in the header block and sanity check it */
668 if (uio->uio_resid < sizeof(*hdr)) {
672 error = uiomove(hdr, sizeof(*hdr), uio);
676 ccb = xpt_alloc_ccb();
684 * Copy in the CDB block. The designers of the interface didn't
685 * bother to provide a size for this in the header, so we have to
686 * figure it out ourselves.
688 if (uio->uio_resid < 1)
690 error = uiomove(&cdb_cmd, 1, uio);
693 if (hdr->twelve_byte)
696 cdb_len = scsi_group_len(cdb_cmd);
698 * We've already read the first byte of the CDB and advanced the uio
699 * pointer. Just read the rest.
701 csio->cdb_io.cdb_bytes[0] = cdb_cmd;
702 error = uiomove(&csio->cdb_io.cdb_bytes[1], cdb_len - 1, uio);
707 * Now set up the data block. Again, the designers didn't bother
708 * to make this reliable.
710 buf_len = uio->uio_resid;
712 buf = malloc(buf_len, M_DEVBUF, M_WAITOK | M_ZERO);
713 error = uiomove(buf, buf_len, uio);
717 } else if (hdr->reply_len != 0) {
718 buf = malloc(hdr->reply_len, M_DEVBUF, M_WAITOK | M_ZERO);
719 buf_len = hdr->reply_len;
727 cam_periph_lock(periph);
729 xpt_setup_ccb(&ccb->ccb_h, periph->path, /*priority*/5);
742 * Send off the command and hope that it works. This path does not
743 * go through sgstart because the I/O is supposed to be asynchronous.
746 rdwr->buf_len = buf_len;
747 rdwr->tag = hdr->pack_id;
749 rdwr->state = SG_RDWR_INPROG;
750 ccb->ccb_h.ccb_rdwr = rdwr;
751 ccb->ccb_h.ccb_type = SG_CCB_RDWR_IO;
752 TAILQ_INSERT_TAIL(&sc->rdwr_done, rdwr, rdwr_link);
753 error = sgsendrdwr(periph, ccb);
754 cam_periph_unlock(periph);
762 free(rdwr, M_DEVBUF);
767 sgread(struct cdev *dev, struct uio *uio, int ioflag)
769 struct ccb_scsiio *csio;
770 struct cam_periph *periph;
772 struct sg_header *hdr;
773 struct sg_rdwr *rdwr;
774 u_short hstat, dstat;
775 int error, pack_len, reply_len, pack_id;
777 periph = dev->si_drv1;
779 /* XXX The pack len field needs to be updated and written out instead
780 * of discarded. Not sure how to do that.
782 uio->uio_rw = UIO_WRITE;
783 if ((error = uiomove(&pack_len, 4, uio)) != 0)
785 if ((error = uiomove(&reply_len, 4, uio)) != 0)
787 if ((error = uiomove(&pack_id, 4, uio)) != 0)
789 uio->uio_rw = UIO_READ;
791 cam_periph_lock(periph);
794 TAILQ_FOREACH(rdwr, &sc->rdwr_done, rdwr_link) {
795 if (rdwr->tag == pack_id)
798 if ((rdwr == NULL) || (rdwr->state != SG_RDWR_DONE)) {
799 if (msleep(rdwr, periph->sim->mtx, PCATCH, "sgread", 0) == ERESTART)
803 TAILQ_REMOVE(&sc->rdwr_done, rdwr, rdwr_link);
804 cam_periph_unlock(periph);
806 hdr = &rdwr->hdr.hdr;
807 csio = &rdwr->ccb->csio;
808 sg_scsiio_status(csio, &hstat, &dstat);
809 hdr->host_status = hstat;
810 hdr->driver_status = dstat;
811 hdr->target_status = csio->scsi_status >> 1;
815 case DID_PASSTHROUGH:
835 if (dstat == DRIVER_SENSE) {
836 bcopy(&csio->sense_data, hdr->sense_buffer,
837 min(csio->sense_len, SG_MAX_SENSE));
839 scsi_sense_print(csio);
843 error = uiomove(&hdr->result, sizeof(*hdr) -
844 offsetof(struct sg_header, result), uio);
845 if ((error == 0) && (hdr->result == 0))
846 error = uiomove(rdwr->buf, rdwr->buf_len, uio);
848 cam_periph_lock(periph);
849 xpt_free_ccb(rdwr->ccb);
850 cam_periph_unlock(periph);
851 free(rdwr->buf, M_DEVBUF);
852 free(rdwr, M_DEVBUF);
857 sgsendccb(struct cam_periph *periph, union ccb *ccb)
859 struct sg_softc *softc;
860 struct cam_periph_map_info mapinfo;
861 int error, need_unmap = 0;
863 softc = periph->softc;
864 if (((ccb->ccb_h.flags & CAM_DIR_MASK) != CAM_DIR_NONE)
865 && (ccb->csio.data_ptr != NULL)) {
866 bzero(&mapinfo, sizeof(mapinfo));
869 * cam_periph_mapmem calls into proc and vm functions that can
870 * sleep as well as trigger I/O, so we can't hold the lock.
871 * Dropping it here is reasonably safe.
873 cam_periph_unlock(periph);
874 error = cam_periph_mapmem(ccb, &mapinfo);
875 cam_periph_lock(periph);
881 error = cam_periph_runccb(ccb,
885 softc->device_stats);
888 cam_periph_unmapmem(ccb, &mapinfo);
894 sgsendrdwr(struct cam_periph *periph, union ccb *ccb)
896 struct sg_softc *softc;
898 softc = periph->softc;
899 devstat_start_transaction(softc->device_stats, NULL);
905 sgerror(union ccb *ccb, uint32_t cam_flags, uint32_t sense_flags)
907 struct cam_periph *periph;
908 struct sg_softc *softc;
910 periph = xpt_path_periph(ccb->ccb_h.path);
911 softc = (struct sg_softc *)periph->softc;
913 return (cam_periph_error(ccb, cam_flags, sense_flags,
918 sg_scsiio_status(struct ccb_scsiio *csio, u_short *hoststat, u_short *drvstat)
922 status = csio->ccb_h.status;
924 switch (status & CAM_STATUS_MASK) {
929 case CAM_REQ_CMP_ERR:
930 *hoststat = DID_ERROR;
933 case CAM_REQ_ABORTED:
934 *hoststat = DID_ABORT;
937 case CAM_REQ_INVALID:
938 *hoststat = DID_ERROR;
939 *drvstat = DRIVER_INVALID;
941 case CAM_DEV_NOT_THERE:
942 *hoststat = DID_BAD_TARGET;
945 case CAM_SEL_TIMEOUT:
946 *hoststat = DID_NO_CONNECT;
949 case CAM_CMD_TIMEOUT:
950 *hoststat = DID_TIME_OUT;
953 case CAM_SCSI_STATUS_ERROR:
954 *hoststat = DID_ERROR;
956 case CAM_SCSI_BUS_RESET:
957 *hoststat = DID_RESET;
960 case CAM_UNCOR_PARITY:
961 *hoststat = DID_PARITY;
965 *hoststat = DID_BUS_BUSY;
968 *hoststat = DID_ERROR;
969 *drvstat = DRIVER_ERROR;
972 if (status & CAM_AUTOSNS_VALID)
973 *drvstat = DRIVER_SENSE;
977 scsi_group_len(u_char cmd)
979 int len[] = {6, 10, 10, 12, 12, 12, 10, 10};
982 group = (cmd >> 5) & 0x7;