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>
64 SG_FLAG_LOCKED = 0x01,
65 SG_FLAG_INVALID = 0x02
83 #define ccb_type ppriv_field0
84 #define ccb_rdwr ppriv_ptr1
87 TAILQ_ENTRY(sg_rdwr) rdwr_link;
95 struct sg_io_hdr io_hdr;
102 struct devstat *device_stats;
103 TAILQ_HEAD(, sg_rdwr) rdwr_done;
111 static d_open_t sgopen;
112 static d_close_t sgclose;
113 static d_ioctl_t sgioctl;
114 static d_write_t sgwrite;
115 static d_read_t sgread;
117 static periph_init_t sginit;
118 static periph_ctor_t sgregister;
119 static periph_oninv_t sgoninvalidate;
120 static periph_dtor_t sgcleanup;
121 static periph_start_t sgstart;
122 static void sgasync(void *callback_arg, uint32_t code,
123 struct cam_path *path, void *arg);
124 static void sgdone(struct cam_periph *periph, union ccb *done_ccb);
125 static int sgsendccb(struct cam_periph *periph, union ccb *ccb);
126 static int sgsendrdwr(struct cam_periph *periph, union ccb *ccb);
127 static int sgerror(union ccb *ccb, uint32_t cam_flags,
128 uint32_t sense_flags);
129 static void sg_scsiio_status(struct ccb_scsiio *csio,
130 u_short *hoststat, u_short *drvstat);
132 static int scsi_group_len(u_char cmd);
134 static struct periph_driver sgdriver =
137 TAILQ_HEAD_INITIALIZER(sgdriver.units), /* gen */ 0
139 PERIPHDRIVER_DECLARE(sg, sgdriver);
141 static struct cdevsw sg_cdevsw = {
142 .d_version = D_VERSION,
143 .d_flags = D_NEEDGIANT | D_TRACKCLOSE,
152 static int sg_version = 30125;
160 * Install a global async callback. This callback will receive aync
161 * callbacks like "new device found".
163 status = xpt_register_async(AC_FOUND_DEVICE, sgasync, NULL, NULL);
165 if (status != CAM_REQ_CMP) {
166 printf("sg: Failed to attach master async callbac "
167 "due to status 0x%x!\n", status);
172 sgoninvalidate(struct cam_periph *periph)
174 struct sg_softc *softc;
176 softc = (struct sg_softc *)periph->softc;
179 * Deregister any async callbacks.
181 xpt_register_async(0, sgasync, periph, periph->path);
183 softc->flags |= SG_FLAG_INVALID;
186 * XXX Return all queued I/O with ENXIO.
187 * XXX Handle any transactions queued to the card
188 * with XPT_ABORT_CCB.
192 xpt_print(periph->path, "lost device\n");
197 sgcleanup(struct cam_periph *periph)
199 struct sg_softc *softc;
201 softc = (struct sg_softc *)periph->softc;
203 xpt_print(periph->path, "removing device entry\n");
204 devstat_remove_entry(softc->device_stats);
205 cam_periph_unlock(periph);
206 destroy_dev(softc->dev);
207 cam_periph_lock(periph);
208 free(softc, M_DEVBUF);
212 sgasync(void *callback_arg, uint32_t code, struct cam_path *path, void *arg)
214 struct cam_periph *periph;
216 periph = (struct cam_periph *)callback_arg;
219 case AC_FOUND_DEVICE:
221 struct ccb_getdev *cgd;
224 cgd = (struct ccb_getdev *)arg;
228 if (cgd->protocol != PROTO_SCSI)
232 * Allocate a peripheral instance for this device and
233 * start the probe process.
235 status = cam_periph_alloc(sgregister, sgoninvalidate,
236 sgcleanup, sgstart, "sg",
237 CAM_PERIPH_BIO, cgd->ccb_h.path,
238 sgasync, AC_FOUND_DEVICE, cgd);
239 if ((status != CAM_REQ_CMP) && (status != CAM_REQ_INPROG)) {
240 const struct cam_status_entry *entry;
242 entry = cam_fetch_status_entry(status);
243 printf("sgasync: Unable to attach new device "
244 "due to status %#x: %s\n", status, entry ?
245 entry->status_text : "Unknown");
250 cam_periph_async(periph, code, path, arg);
256 sgregister(struct cam_periph *periph, void *arg)
258 struct sg_softc *softc;
259 struct ccb_getdev *cgd;
260 struct ccb_pathinq cpi;
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;
287 bzero(&cpi, sizeof(cpi));
288 xpt_setup_ccb(&cpi.ccb_h, periph->path, CAM_PRIORITY_NORMAL);
289 cpi.ccb_h.func_code = XPT_PATH_INQ;
290 xpt_action((union ccb *)&cpi);
293 * We pass in 0 for all blocksize, since we don't know what the
294 * blocksize of the device is, if it even has a blocksize.
296 cam_periph_unlock(periph);
297 no_tags = (cgd->inq_data.flags & SID_CmdQue) == 0;
298 softc->device_stats = devstat_new_entry("sg",
299 periph->unit_number, 0,
301 | (no_tags ? DEVSTAT_NO_ORDERED_TAGS : 0),
303 XPORT_DEVSTAT_TYPE(cpi.transport) |
305 DEVSTAT_PRIORITY_PASS);
307 /* Register the device */
308 softc->dev = make_dev(&sg_cdevsw, periph->unit_number,
309 UID_ROOT, GID_OPERATOR, 0600, "%s%d",
310 periph->periph_name, periph->unit_number);
311 if (periph->unit_number < 26) {
312 (void)make_dev_alias(softc->dev, "sg%c",
313 periph->unit_number + 'a');
315 (void)make_dev_alias(softc->dev, "sg%c%c",
316 ((periph->unit_number / 26) - 1) + 'a',
317 (periph->unit_number % 26) + 'a');
319 cam_periph_lock(periph);
320 softc->dev->si_drv1 = periph;
323 * Add as async callback so that we get
324 * notified if this device goes away.
326 xpt_register_async(AC_LOST_DEVICE, sgasync, periph, periph->path);
329 xpt_announce_periph(periph, NULL);
331 return (CAM_REQ_CMP);
335 sgstart(struct cam_periph *periph, union ccb *start_ccb)
337 struct sg_softc *softc;
339 softc = (struct sg_softc *)periph->softc;
341 switch (softc->state) {
342 case SG_STATE_NORMAL:
343 start_ccb->ccb_h.ccb_type = SG_CCB_WAITING;
344 SLIST_INSERT_HEAD(&periph->ccb_list, &start_ccb->ccb_h,
346 periph->immediate_priority = CAM_PRIORITY_NONE;
347 wakeup(&periph->ccb_list);
353 sgdone(struct cam_periph *periph, union ccb *done_ccb)
355 struct sg_softc *softc;
356 struct ccb_scsiio *csio;
358 softc = (struct sg_softc *)periph->softc;
359 csio = &done_ccb->csio;
360 switch (csio->ccb_h.ccb_type) {
362 /* Caller will release the CCB */
363 wakeup(&done_ccb->ccb_h.cbfcnp);
367 struct sg_rdwr *rdwr;
370 devstat_end_transaction(softc->device_stats,
372 csio->tag_action & 0xf,
373 ((csio->ccb_h.flags & CAM_DIR_MASK) ==
374 CAM_DIR_NONE) ? DEVSTAT_NO_DATA :
375 (csio->ccb_h.flags & CAM_DIR_OUT) ?
376 DEVSTAT_WRITE : DEVSTAT_READ,
379 rdwr = done_ccb->ccb_h.ccb_rdwr;
381 rdwr->state = SG_RDWR_DONE;
386 panic("unknown sg CCB type");
391 sgopen(struct cdev *dev, int flags, int fmt, struct thread *td)
393 struct cam_periph *periph;
394 struct sg_softc *softc;
397 periph = (struct cam_periph *)dev->si_drv1;
401 if (cam_periph_acquire(periph) != CAM_REQ_CMP)
405 * Don't allow access when we're running at a high securelevel.
407 error = securelevel_gt(td->td_ucred, 1);
409 cam_periph_release(periph);
413 cam_periph_lock(periph);
415 softc = (struct sg_softc *)periph->softc;
416 if (softc->flags & SG_FLAG_INVALID) {
417 cam_periph_release_locked(periph);
418 cam_periph_unlock(periph);
422 cam_periph_unlock(periph);
428 sgclose(struct cdev *dev, int flag, int fmt, struct thread *td)
430 struct cam_periph *periph;
432 periph = (struct cam_periph *)dev->si_drv1;
436 cam_periph_release(periph);
442 sgioctl(struct cdev *dev, u_long cmd, caddr_t arg, int flag, struct thread *td)
445 struct ccb_scsiio *csio;
446 struct cam_periph *periph;
447 struct sg_softc *softc;
448 struct sg_io_hdr req;
451 periph = (struct cam_periph *)dev->si_drv1;
455 cam_periph_lock(periph);
457 softc = (struct sg_softc *)periph->softc;
461 case LINUX_SCSI_GET_BUS_NUMBER: {
464 busno = xpt_path_path_id(periph->path);
465 error = copyout(&busno, arg, sizeof(busno));
468 case LINUX_SCSI_GET_IDLUN: {
469 struct scsi_idlun idlun;
472 idlun.dev_id = xpt_path_target_id(periph->path);
473 sim = xpt_path_sim(periph->path);
474 idlun.host_unique_id = sim->unit_number;
475 error = copyout(&idlun, arg, sizeof(idlun));
478 case SG_GET_VERSION_NUM:
479 case LINUX_SG_GET_VERSION_NUM:
480 error = copyout(&sg_version, arg, sizeof(sg_version));
483 case LINUX_SG_SET_TIMEOUT: {
486 error = copyin(arg, &user_timeout, sizeof(u_int));
488 softc->sg_user_timeout = user_timeout;
489 softc->sg_timeout = user_timeout / SG_DEFAULT_HZ * hz;
494 case LINUX_SG_GET_TIMEOUT:
496 * The value is returned directly to the syscall.
498 td->td_retval[0] = softc->sg_user_timeout;
503 error = copyin(arg, &req, sizeof(req));
507 if (req.cmd_len > IOCDBLEN) {
512 if (req.iovec_count != 0) {
517 ccb = cam_periph_getccb(periph, CAM_PRIORITY_NORMAL);
520 error = copyin(req.cmdp, &csio->cdb_io.cdb_bytes,
523 xpt_release_ccb(ccb);
527 switch(req.dxfer_direction) {
528 case SG_DXFER_TO_DEV:
531 case SG_DXFER_FROM_DEV:
534 case SG_DXFER_TO_FROM_DEV:
535 dir = CAM_DIR_IN | CAM_DIR_OUT;
554 error = sgsendccb(periph, ccb);
556 req.host_status = DID_ERROR;
557 req.driver_status = DRIVER_INVALID;
558 xpt_release_ccb(ccb);
562 req.status = csio->scsi_status;
563 req.masked_status = (csio->scsi_status >> 1) & 0x7f;
564 sg_scsiio_status(csio, &req.host_status, &req.driver_status);
565 req.resid = csio->resid;
566 req.duration = csio->ccb_h.timeout;
569 error = copyout(&req, arg, sizeof(req));
570 if ((error == 0) && (csio->ccb_h.status & CAM_AUTOSNS_VALID)
571 && (req.sbp != NULL)) {
572 req.sb_len_wr = req.mx_sb_len - csio->sense_resid;
573 error = copyout(&csio->sense_data, req.sbp,
577 xpt_release_ccb(ccb);
580 case SG_GET_RESERVED_SIZE:
581 case LINUX_SG_GET_RESERVED_SIZE: {
584 error = copyout(&size, arg, sizeof(size));
589 case LINUX_SG_GET_SCSI_ID:
591 struct sg_scsi_id id;
593 id.host_no = cam_sim_path(xpt_path_sim(periph->path));
594 id.channel = xpt_path_path_id(periph->path);
595 id.scsi_id = xpt_path_target_id(periph->path);
596 id.lun = xpt_path_lun_id(periph->path);
597 id.scsi_type = softc->pd_type;
598 id.h_cmd_per_lun = 1;
599 id.d_queue_depth = 1;
603 error = copyout(&id, arg, sizeof(id));
607 case SG_EMULATED_HOST:
608 case SG_SET_TRANSFORM:
609 case SG_GET_TRANSFORM:
610 case SG_GET_NUM_WAITING:
612 case SG_GET_REQUEST_TABLE:
613 case SG_SET_KEEP_ORPHAN:
614 case SG_GET_KEEP_ORPHAN:
615 case SG_GET_ACCESS_COUNT:
616 case SG_SET_FORCE_LOW_DMA:
618 case SG_GET_SG_TABLESIZE:
619 case SG_SET_FORCE_PACK_ID:
621 case SG_SET_RESERVED_SIZE:
622 case SG_GET_COMMAND_Q:
623 case SG_SET_COMMAND_Q:
625 case SG_NEXT_CMD_LEN:
626 case LINUX_SG_EMULATED_HOST:
627 case LINUX_SG_SET_TRANSFORM:
628 case LINUX_SG_GET_TRANSFORM:
629 case LINUX_SG_GET_NUM_WAITING:
630 case LINUX_SG_SCSI_RESET:
631 case LINUX_SG_GET_REQUEST_TABLE:
632 case LINUX_SG_SET_KEEP_ORPHAN:
633 case LINUX_SG_GET_KEEP_ORPHAN:
634 case LINUX_SG_GET_ACCESS_COUNT:
635 case LINUX_SG_SET_FORCE_LOW_DMA:
636 case LINUX_SG_GET_LOW_DMA:
637 case LINUX_SG_GET_SG_TABLESIZE:
638 case LINUX_SG_SET_FORCE_PACK_ID:
639 case LINUX_SG_GET_PACK_ID:
640 case LINUX_SG_SET_RESERVED_SIZE:
641 case LINUX_SG_GET_COMMAND_Q:
642 case LINUX_SG_SET_COMMAND_Q:
643 case LINUX_SG_SET_DEBUG:
644 case LINUX_SG_NEXT_CMD_LEN:
647 printf("sgioctl: rejecting cmd 0x%lx\n", cmd);
653 cam_periph_unlock(periph);
658 sgwrite(struct cdev *dev, struct uio *uio, int ioflag)
661 struct cam_periph *periph;
662 struct ccb_scsiio *csio;
664 struct sg_header *hdr;
665 struct sg_rdwr *rdwr;
668 int error = 0, cdb_len, buf_len, dir;
670 periph = dev->si_drv1;
671 rdwr = malloc(sizeof(*rdwr), M_DEVBUF, M_WAITOK | M_ZERO);
672 hdr = &rdwr->hdr.hdr;
674 /* Copy in the header block and sanity check it */
675 if (uio->uio_resid < sizeof(*hdr)) {
679 error = uiomove(hdr, sizeof(*hdr), uio);
683 ccb = xpt_alloc_ccb();
691 * Copy in the CDB block. The designers of the interface didn't
692 * bother to provide a size for this in the header, so we have to
693 * figure it out ourselves.
695 if (uio->uio_resid < 1)
697 error = uiomove(&cdb_cmd, 1, uio);
700 if (hdr->twelve_byte)
703 cdb_len = scsi_group_len(cdb_cmd);
705 * We've already read the first byte of the CDB and advanced the uio
706 * pointer. Just read the rest.
708 csio->cdb_io.cdb_bytes[0] = cdb_cmd;
709 error = uiomove(&csio->cdb_io.cdb_bytes[1], cdb_len - 1, uio);
714 * Now set up the data block. Again, the designers didn't bother
715 * to make this reliable.
717 buf_len = uio->uio_resid;
719 buf = malloc(buf_len, M_DEVBUF, M_WAITOK | M_ZERO);
720 error = uiomove(buf, buf_len, uio);
724 } else if (hdr->reply_len != 0) {
725 buf = malloc(hdr->reply_len, M_DEVBUF, M_WAITOK | M_ZERO);
726 buf_len = hdr->reply_len;
734 cam_periph_lock(periph);
736 xpt_setup_ccb(&ccb->ccb_h, periph->path, CAM_PRIORITY_NORMAL);
749 * Send off the command and hope that it works. This path does not
750 * go through sgstart because the I/O is supposed to be asynchronous.
753 rdwr->buf_len = buf_len;
754 rdwr->tag = hdr->pack_id;
756 rdwr->state = SG_RDWR_INPROG;
757 ccb->ccb_h.ccb_rdwr = rdwr;
758 ccb->ccb_h.ccb_type = SG_CCB_RDWR_IO;
759 TAILQ_INSERT_TAIL(&sc->rdwr_done, rdwr, rdwr_link);
760 error = sgsendrdwr(periph, ccb);
761 cam_periph_unlock(periph);
769 free(rdwr, M_DEVBUF);
774 sgread(struct cdev *dev, struct uio *uio, int ioflag)
776 struct ccb_scsiio *csio;
777 struct cam_periph *periph;
779 struct sg_header *hdr;
780 struct sg_rdwr *rdwr;
781 u_short hstat, dstat;
782 int error, pack_len, reply_len, pack_id;
784 periph = dev->si_drv1;
786 /* XXX The pack len field needs to be updated and written out instead
787 * of discarded. Not sure how to do that.
789 uio->uio_rw = UIO_WRITE;
790 if ((error = uiomove(&pack_len, 4, uio)) != 0)
792 if ((error = uiomove(&reply_len, 4, uio)) != 0)
794 if ((error = uiomove(&pack_id, 4, uio)) != 0)
796 uio->uio_rw = UIO_READ;
798 cam_periph_lock(periph);
801 TAILQ_FOREACH(rdwr, &sc->rdwr_done, rdwr_link) {
802 if (rdwr->tag == pack_id)
805 if ((rdwr == NULL) || (rdwr->state != SG_RDWR_DONE)) {
806 if (msleep(rdwr, periph->sim->mtx, PCATCH, "sgread", 0) == ERESTART)
810 TAILQ_REMOVE(&sc->rdwr_done, rdwr, rdwr_link);
811 cam_periph_unlock(periph);
813 hdr = &rdwr->hdr.hdr;
814 csio = &rdwr->ccb->csio;
815 sg_scsiio_status(csio, &hstat, &dstat);
816 hdr->host_status = hstat;
817 hdr->driver_status = dstat;
818 hdr->target_status = csio->scsi_status >> 1;
822 case DID_PASSTHROUGH:
842 if (dstat == DRIVER_SENSE) {
843 bcopy(&csio->sense_data, hdr->sense_buffer,
844 min(csio->sense_len, SG_MAX_SENSE));
846 scsi_sense_print(csio);
850 error = uiomove(&hdr->result, sizeof(*hdr) -
851 offsetof(struct sg_header, result), uio);
852 if ((error == 0) && (hdr->result == 0))
853 error = uiomove(rdwr->buf, rdwr->buf_len, uio);
855 cam_periph_lock(periph);
856 xpt_free_ccb(rdwr->ccb);
857 cam_periph_unlock(periph);
858 free(rdwr->buf, M_DEVBUF);
859 free(rdwr, M_DEVBUF);
864 sgsendccb(struct cam_periph *periph, union ccb *ccb)
866 struct sg_softc *softc;
867 struct cam_periph_map_info mapinfo;
868 int error, need_unmap = 0;
870 softc = periph->softc;
871 if (((ccb->ccb_h.flags & CAM_DIR_MASK) != CAM_DIR_NONE)
872 && (ccb->csio.data_ptr != NULL)) {
873 bzero(&mapinfo, sizeof(mapinfo));
876 * cam_periph_mapmem calls into proc and vm functions that can
877 * sleep as well as trigger I/O, so we can't hold the lock.
878 * Dropping it here is reasonably safe.
880 cam_periph_unlock(periph);
881 error = cam_periph_mapmem(ccb, &mapinfo);
882 cam_periph_lock(periph);
888 error = cam_periph_runccb(ccb,
892 softc->device_stats);
895 cam_periph_unmapmem(ccb, &mapinfo);
901 sgsendrdwr(struct cam_periph *periph, union ccb *ccb)
903 struct sg_softc *softc;
905 softc = periph->softc;
906 devstat_start_transaction(softc->device_stats, NULL);
912 sgerror(union ccb *ccb, uint32_t cam_flags, uint32_t sense_flags)
914 struct cam_periph *periph;
915 struct sg_softc *softc;
917 periph = xpt_path_periph(ccb->ccb_h.path);
918 softc = (struct sg_softc *)periph->softc;
920 return (cam_periph_error(ccb, cam_flags, sense_flags,
925 sg_scsiio_status(struct ccb_scsiio *csio, u_short *hoststat, u_short *drvstat)
929 status = csio->ccb_h.status;
931 switch (status & CAM_STATUS_MASK) {
936 case CAM_REQ_CMP_ERR:
937 *hoststat = DID_ERROR;
940 case CAM_REQ_ABORTED:
941 *hoststat = DID_ABORT;
944 case CAM_REQ_INVALID:
945 *hoststat = DID_ERROR;
946 *drvstat = DRIVER_INVALID;
948 case CAM_DEV_NOT_THERE:
949 *hoststat = DID_BAD_TARGET;
952 case CAM_SEL_TIMEOUT:
953 *hoststat = DID_NO_CONNECT;
956 case CAM_CMD_TIMEOUT:
957 *hoststat = DID_TIME_OUT;
960 case CAM_SCSI_STATUS_ERROR:
961 *hoststat = DID_ERROR;
964 case CAM_SCSI_BUS_RESET:
965 *hoststat = DID_RESET;
968 case CAM_UNCOR_PARITY:
969 *hoststat = DID_PARITY;
973 *hoststat = DID_BUS_BUSY;
977 *hoststat = DID_ERROR;
978 *drvstat = DRIVER_ERROR;
981 if (status & CAM_AUTOSNS_VALID)
982 *drvstat = DRIVER_SENSE;
986 scsi_group_len(u_char cmd)
988 int len[] = {6, 10, 10, 12, 12, 12, 10, 10};
991 group = (cmd >> 5) & 0x7;