2 * Common functions for CAM "type" (peripheral) drivers.
4 * Copyright (c) 1997, 1998 Justin T. Gibbs.
5 * Copyright (c) 1997, 1998, 1999, 2000 Kenneth D. Merry.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions, and the following disclaimer,
13 * without modification, immediately at the beginning of the file.
14 * 2. The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
21 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD$");
33 #include <sys/param.h>
34 #include <sys/systm.h>
35 #include <sys/types.h>
36 #include <sys/malloc.h>
37 #include <sys/kernel.h>
40 #include <sys/mutex.h>
43 #include <sys/devicestat.h>
47 #include <vm/vm_extern.h>
50 #include <cam/cam_ccb.h>
51 #include <cam/cam_queue.h>
52 #include <cam/cam_xpt_periph.h>
53 #include <cam/cam_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_pass.h>
61 static u_int camperiphnextunit(struct periph_driver *p_drv,
62 u_int newunit, int wired,
63 path_id_t pathid, target_id_t target,
65 static u_int camperiphunit(struct periph_driver *p_drv,
66 path_id_t pathid, target_id_t target,
68 static void camperiphdone(struct cam_periph *periph,
70 static void camperiphfree(struct cam_periph *periph);
71 static int camperiphscsistatuserror(union ccb *ccb,
74 u_int32_t sense_flags,
76 u_int32_t *relsim_flags,
79 const char **action_string);
80 static int camperiphscsisenseerror(union ccb *ccb,
83 u_int32_t sense_flags,
85 u_int32_t *relsim_flags,
88 const char **action_string);
90 static int nperiph_drivers;
91 static int initialized = 0;
92 struct periph_driver **periph_drivers;
94 static MALLOC_DEFINE(M_CAMPERIPH, "CAM periph", "CAM peripheral buffers");
96 static int periph_selto_delay = 1000;
97 TUNABLE_INT("kern.cam.periph_selto_delay", &periph_selto_delay);
98 static int periph_noresrc_delay = 500;
99 TUNABLE_INT("kern.cam.periph_noresrc_delay", &periph_noresrc_delay);
100 static int periph_busy_delay = 500;
101 TUNABLE_INT("kern.cam.periph_busy_delay", &periph_busy_delay);
105 periphdriver_register(void *data)
107 struct periph_driver *drv = (struct periph_driver *)data;
108 struct periph_driver **newdrivers, **old;
111 ndrivers = nperiph_drivers + 2;
112 newdrivers = malloc(sizeof(*newdrivers) * ndrivers, M_CAMPERIPH,
115 bcopy(periph_drivers, newdrivers,
116 sizeof(*newdrivers) * nperiph_drivers);
117 newdrivers[nperiph_drivers] = drv;
118 newdrivers[nperiph_drivers + 1] = NULL;
119 old = periph_drivers;
120 periph_drivers = newdrivers;
122 free(old, M_CAMPERIPH);
124 /* If driver marked as early or it is late now, initialize it. */
125 if (((drv->flags & CAM_PERIPH_DRV_EARLY) != 0 && initialized > 0) ||
131 periphdriver_init(int level)
135 initialized = max(initialized, level);
136 for (i = 0; periph_drivers[i] != NULL; i++) {
137 early = (periph_drivers[i]->flags & CAM_PERIPH_DRV_EARLY) ? 1 : 2;
138 if (early == initialized)
139 (*periph_drivers[i]->init)();
144 cam_periph_alloc(periph_ctor_t *periph_ctor,
145 periph_oninv_t *periph_oninvalidate,
146 periph_dtor_t *periph_dtor, periph_start_t *periph_start,
147 char *name, cam_periph_type type, struct cam_path *path,
148 ac_callback_t *ac_callback, ac_code code, void *arg)
150 struct periph_driver **p_drv;
152 struct cam_periph *periph;
153 struct cam_periph *cur_periph;
155 target_id_t target_id;
162 * Handle Hot-Plug scenarios. If there is already a peripheral
163 * of our type assigned to this path, we are likely waiting for
164 * final close on an old, invalidated, peripheral. If this is
165 * the case, queue up a deferred call to the peripheral's async
166 * handler. If it looks like a mistaken re-allocation, complain.
168 if ((periph = cam_periph_find(path, name)) != NULL) {
170 if ((periph->flags & CAM_PERIPH_INVALID) != 0
171 && (periph->flags & CAM_PERIPH_NEW_DEV_FOUND) == 0) {
172 periph->flags |= CAM_PERIPH_NEW_DEV_FOUND;
173 periph->deferred_callback = ac_callback;
174 periph->deferred_ac = code;
175 return (CAM_REQ_INPROG);
177 printf("cam_periph_alloc: attempt to re-allocate "
178 "valid device %s%d rejected flags %#x "
179 "refcount %d\n", periph->periph_name,
180 periph->unit_number, periph->flags,
183 return (CAM_REQ_INVALID);
186 periph = (struct cam_periph *)malloc(sizeof(*periph), M_CAMPERIPH,
190 return (CAM_RESRC_UNAVAIL);
195 sim = xpt_path_sim(path);
196 path_id = xpt_path_path_id(path);
197 target_id = xpt_path_target_id(path);
198 lun_id = xpt_path_lun_id(path);
199 periph->periph_start = periph_start;
200 periph->periph_dtor = periph_dtor;
201 periph->periph_oninval = periph_oninvalidate;
203 periph->periph_name = name;
204 periph->scheduled_priority = CAM_PRIORITY_NONE;
205 periph->immediate_priority = CAM_PRIORITY_NONE;
206 periph->refcount = 1; /* Dropped by invalidation. */
208 SLIST_INIT(&periph->ccb_list);
209 status = xpt_create_path(&path, periph, path_id, target_id, lun_id);
210 if (status != CAM_REQ_CMP)
215 for (p_drv = periph_drivers; *p_drv != NULL; p_drv++) {
216 if (strcmp((*p_drv)->driver_name, name) == 0)
219 if (*p_drv == NULL) {
220 printf("cam_periph_alloc: invalid periph name '%s'\n", name);
222 xpt_free_path(periph->path);
223 free(periph, M_CAMPERIPH);
224 return (CAM_REQ_INVALID);
226 periph->unit_number = camperiphunit(*p_drv, path_id, target_id, lun_id);
227 cur_periph = TAILQ_FIRST(&(*p_drv)->units);
228 while (cur_periph != NULL
229 && cur_periph->unit_number < periph->unit_number)
230 cur_periph = TAILQ_NEXT(cur_periph, unit_links);
231 if (cur_periph != NULL) {
232 KASSERT(cur_periph->unit_number != periph->unit_number, ("duplicate units on periph list"));
233 TAILQ_INSERT_BEFORE(cur_periph, periph, unit_links);
235 TAILQ_INSERT_TAIL(&(*p_drv)->units, periph, unit_links);
236 (*p_drv)->generation++;
242 status = xpt_add_periph(periph);
243 if (status != CAM_REQ_CMP)
247 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, ("Periph created\n"));
249 status = periph_ctor(periph, arg);
251 if (status == CAM_REQ_CMP)
255 switch (init_level) {
257 /* Initialized successfully */
260 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, ("Periph destroyed\n"));
261 xpt_remove_periph(periph);
265 TAILQ_REMOVE(&(*p_drv)->units, periph, unit_links);
267 xpt_free_path(periph->path);
270 free(periph, M_CAMPERIPH);
273 /* No cleanup to perform. */
276 panic("%s: Unknown init level", __func__);
282 * Find a peripheral structure with the specified path, target, lun,
283 * and (optionally) type. If the name is NULL, this function will return
284 * the first peripheral driver that matches the specified path.
287 cam_periph_find(struct cam_path *path, char *name)
289 struct periph_driver **p_drv;
290 struct cam_periph *periph;
293 for (p_drv = periph_drivers; *p_drv != NULL; p_drv++) {
295 if (name != NULL && (strcmp((*p_drv)->driver_name, name) != 0))
298 TAILQ_FOREACH(periph, &(*p_drv)->units, unit_links) {
299 if (xpt_path_comp(periph->path, path) == 0) {
301 cam_periph_assert(periph, MA_OWNED);
315 * Find peripheral driver instances attached to the specified path.
318 cam_periph_list(struct cam_path *path, struct sbuf *sb)
320 struct sbuf local_sb;
321 struct periph_driver **p_drv;
322 struct cam_periph *periph;
328 sbuf_new(&local_sb, NULL, sbuf_alloc_len, SBUF_FIXEDLEN);
331 for (p_drv = periph_drivers; *p_drv != NULL; p_drv++) {
333 TAILQ_FOREACH(periph, &(*p_drv)->units, unit_links) {
334 if (xpt_path_comp(periph->path, path) != 0)
337 if (sbuf_len(&local_sb) != 0)
338 sbuf_cat(&local_sb, ",");
340 sbuf_printf(&local_sb, "%s%d", periph->periph_name,
341 periph->unit_number);
343 if (sbuf_error(&local_sb) == ENOMEM) {
346 sbuf_delete(&local_sb);
353 sbuf_finish(&local_sb);
354 sbuf_cpy(sb, sbuf_data(&local_sb));
355 sbuf_delete(&local_sb);
360 cam_periph_acquire(struct cam_periph *periph)
364 status = CAM_REQ_CMP_ERR;
369 if ((periph->flags & CAM_PERIPH_INVALID) == 0) {
371 status = CAM_REQ_CMP;
379 cam_periph_release_locked_buses(struct cam_periph *periph)
382 cam_periph_assert(periph, MA_OWNED);
383 KASSERT(periph->refcount >= 1, ("periph->refcount >= 1"));
384 if (--periph->refcount == 0)
385 camperiphfree(periph);
389 cam_periph_release_locked(struct cam_periph *periph)
396 cam_periph_release_locked_buses(periph);
401 cam_periph_release(struct cam_periph *periph)
408 cam_periph_assert(periph, MA_NOTOWNED);
409 mtx = cam_periph_mtx(periph);
411 cam_periph_release_locked(periph);
416 cam_periph_hold(struct cam_periph *periph, int priority)
421 * Increment the reference count on the peripheral
422 * while we wait for our lock attempt to succeed
423 * to ensure the peripheral doesn't disappear out
424 * from user us while we sleep.
427 if (cam_periph_acquire(periph) != CAM_REQ_CMP)
430 cam_periph_assert(periph, MA_OWNED);
431 while ((periph->flags & CAM_PERIPH_LOCKED) != 0) {
432 periph->flags |= CAM_PERIPH_LOCK_WANTED;
433 if ((error = cam_periph_sleep(periph, periph, priority,
434 "caplck", 0)) != 0) {
435 cam_periph_release_locked(periph);
438 if (periph->flags & CAM_PERIPH_INVALID) {
439 cam_periph_release_locked(periph);
444 periph->flags |= CAM_PERIPH_LOCKED;
449 cam_periph_unhold(struct cam_periph *periph)
452 cam_periph_assert(periph, MA_OWNED);
454 periph->flags &= ~CAM_PERIPH_LOCKED;
455 if ((periph->flags & CAM_PERIPH_LOCK_WANTED) != 0) {
456 periph->flags &= ~CAM_PERIPH_LOCK_WANTED;
460 cam_periph_release_locked(periph);
464 * Look for the next unit number that is not currently in use for this
465 * peripheral type starting at "newunit". Also exclude unit numbers that
466 * are reserved by for future "hardwiring" unless we already know that this
467 * is a potential wired device. Only assume that the device is "wired" the
468 * first time through the loop since after that we'll be looking at unit
469 * numbers that did not match a wiring entry.
472 camperiphnextunit(struct periph_driver *p_drv, u_int newunit, int wired,
473 path_id_t pathid, target_id_t target, lun_id_t lun)
475 struct cam_periph *periph;
477 int i, val, dunit, r;
478 const char *dname, *strval;
480 periph_name = p_drv->driver_name;
483 for (periph = TAILQ_FIRST(&p_drv->units);
484 periph != NULL && periph->unit_number != newunit;
485 periph = TAILQ_NEXT(periph, unit_links))
488 if (periph != NULL && periph->unit_number == newunit) {
490 xpt_print(periph->path, "Duplicate Wired "
492 xpt_print(periph->path, "Second device (%s "
493 "device at scbus%d target %d lun %d) will "
494 "not be wired\n", periph_name, pathid,
504 * Don't match entries like "da 4" as a wired down
505 * device, but do match entries like "da 4 target 5"
506 * or even "da 4 scbus 1".
511 r = resource_find_dev(&i, dname, &dunit, NULL, NULL);
514 /* if no "target" and no specific scbus, skip */
515 if (resource_int_value(dname, dunit, "target", &val) &&
516 (resource_string_value(dname, dunit, "at",&strval)||
517 strcmp(strval, "scbus") == 0))
519 if (newunit == dunit)
529 camperiphunit(struct periph_driver *p_drv, path_id_t pathid,
530 target_id_t target, lun_id_t lun)
533 int wired, i, val, dunit;
534 const char *dname, *strval;
535 char pathbuf[32], *periph_name;
537 periph_name = p_drv->driver_name;
538 snprintf(pathbuf, sizeof(pathbuf), "scbus%d", pathid);
542 for (wired = 0; resource_find_dev(&i, dname, &dunit, NULL, NULL) == 0;
544 if (resource_string_value(dname, dunit, "at", &strval) == 0) {
545 if (strcmp(strval, pathbuf) != 0)
549 if (resource_int_value(dname, dunit, "target", &val) == 0) {
554 if (resource_int_value(dname, dunit, "lun", &val) == 0) {
566 * Either start from 0 looking for the next unit or from
567 * the unit number given in the resource config. This way,
568 * if we have wildcard matches, we don't return the same
571 unit = camperiphnextunit(p_drv, unit, wired, pathid, target, lun);
577 cam_periph_invalidate(struct cam_periph *periph)
580 cam_periph_assert(periph, MA_OWNED);
582 * We only call this routine the first time a peripheral is
585 if ((periph->flags & CAM_PERIPH_INVALID) != 0)
588 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, ("Periph invalidated\n"));
589 if (periph->flags & CAM_PERIPH_ANNOUNCED)
590 xpt_denounce_periph(periph);
591 periph->flags |= CAM_PERIPH_INVALID;
592 periph->flags &= ~CAM_PERIPH_NEW_DEV_FOUND;
593 if (periph->periph_oninval != NULL)
594 periph->periph_oninval(periph);
595 cam_periph_release_locked(periph);
599 camperiphfree(struct cam_periph *periph)
601 struct periph_driver **p_drv;
603 cam_periph_assert(periph, MA_OWNED);
604 KASSERT(periph->periph_allocating == 0, ("%s%d: freed while allocating",
605 periph->periph_name, periph->unit_number));
606 for (p_drv = periph_drivers; *p_drv != NULL; p_drv++) {
607 if (strcmp((*p_drv)->driver_name, periph->periph_name) == 0)
610 if (*p_drv == NULL) {
611 printf("camperiphfree: attempt to free non-existant periph\n");
616 * We need to set this flag before dropping the topology lock, to
617 * let anyone who is traversing the list that this peripheral is
618 * about to be freed, and there will be no more reference count
621 periph->flags |= CAM_PERIPH_FREE;
624 * The peripheral destructor semantics dictate calling with only the
625 * SIM mutex held. Since it might sleep, it should not be called
626 * with the topology lock held.
631 * We need to call the peripheral destructor prior to removing the
632 * peripheral from the list. Otherwise, we risk running into a
633 * scenario where the peripheral unit number may get reused
634 * (because it has been removed from the list), but some resources
635 * used by the peripheral are still hanging around. In particular,
636 * the devfs nodes used by some peripherals like the pass(4) driver
637 * aren't fully cleaned up until the destructor is run. If the
638 * unit number is reused before the devfs instance is fully gone,
641 if (periph->periph_dtor != NULL)
642 periph->periph_dtor(periph);
645 * The peripheral list is protected by the topology lock.
649 TAILQ_REMOVE(&(*p_drv)->units, periph, unit_links);
650 (*p_drv)->generation++;
652 xpt_remove_periph(periph);
655 if (periph->flags & CAM_PERIPH_ANNOUNCED) {
656 xpt_print(periph->path, "Periph destroyed\n");
658 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, ("Periph destroyed\n"));
660 if (periph->flags & CAM_PERIPH_NEW_DEV_FOUND) {
664 switch (periph->deferred_ac) {
665 case AC_FOUND_DEVICE:
666 ccb.ccb_h.func_code = XPT_GDEV_TYPE;
667 xpt_setup_ccb(&ccb.ccb_h, periph->path, CAM_PRIORITY_NORMAL);
671 case AC_PATH_REGISTERED:
672 ccb.ccb_h.func_code = XPT_PATH_INQ;
673 xpt_setup_ccb(&ccb.ccb_h, periph->path, CAM_PRIORITY_NORMAL);
681 periph->deferred_callback(NULL, periph->deferred_ac,
684 xpt_free_path(periph->path);
685 free(periph, M_CAMPERIPH);
690 * Map user virtual pointers into kernel virtual address space, so we can
691 * access the memory. This is now a generic function that centralizes most
692 * of the sanity checks on the data flags, if any.
693 * This also only works for up to MAXPHYS memory. Since we use
694 * buffers to map stuff in and out, we're limited to the buffer size.
697 cam_periph_mapmem(union ccb *ccb, struct cam_periph_map_info *mapinfo)
700 int flags[CAM_PERIPH_MAXMAPS];
701 u_int8_t **data_ptrs[CAM_PERIPH_MAXMAPS];
702 u_int32_t lengths[CAM_PERIPH_MAXMAPS];
703 u_int32_t dirs[CAM_PERIPH_MAXMAPS];
704 /* Some controllers may not be able to handle more data. */
705 size_t maxmap = DFLTPHYS;
707 switch(ccb->ccb_h.func_code) {
709 if (ccb->cdm.match_buf_len == 0) {
710 printf("cam_periph_mapmem: invalid match buffer "
714 if (ccb->cdm.pattern_buf_len > 0) {
715 data_ptrs[0] = (u_int8_t **)&ccb->cdm.patterns;
716 lengths[0] = ccb->cdm.pattern_buf_len;
717 dirs[0] = CAM_DIR_OUT;
718 data_ptrs[1] = (u_int8_t **)&ccb->cdm.matches;
719 lengths[1] = ccb->cdm.match_buf_len;
720 dirs[1] = CAM_DIR_IN;
723 data_ptrs[0] = (u_int8_t **)&ccb->cdm.matches;
724 lengths[0] = ccb->cdm.match_buf_len;
725 dirs[0] = CAM_DIR_IN;
729 * This request will not go to the hardware, no reason
730 * to be so strict. vmapbuf() is able to map up to MAXPHYS.
735 case XPT_CONT_TARGET_IO:
736 if ((ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_NONE)
738 if ((ccb->ccb_h.flags & CAM_DATA_MASK) != CAM_DATA_VADDR)
740 data_ptrs[0] = &ccb->csio.data_ptr;
741 lengths[0] = ccb->csio.dxfer_len;
742 dirs[0] = ccb->ccb_h.flags & CAM_DIR_MASK;
746 if ((ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_NONE)
748 if ((ccb->ccb_h.flags & CAM_DATA_MASK) != CAM_DATA_VADDR)
750 data_ptrs[0] = &ccb->ataio.data_ptr;
751 lengths[0] = ccb->ataio.dxfer_len;
752 dirs[0] = ccb->ccb_h.flags & CAM_DIR_MASK;
756 data_ptrs[0] = &ccb->smpio.smp_request;
757 lengths[0] = ccb->smpio.smp_request_len;
758 dirs[0] = CAM_DIR_OUT;
759 data_ptrs[1] = &ccb->smpio.smp_response;
760 lengths[1] = ccb->smpio.smp_response_len;
761 dirs[1] = CAM_DIR_IN;
764 case XPT_DEV_ADVINFO:
765 if (ccb->cdai.bufsiz == 0)
768 data_ptrs[0] = (uint8_t **)&ccb->cdai.buf;
769 lengths[0] = ccb->cdai.bufsiz;
770 dirs[0] = CAM_DIR_IN;
774 * This request will not go to the hardware, no reason
775 * to be so strict. vmapbuf() is able to map up to MAXPHYS.
781 break; /* NOTREACHED */
785 * Check the transfer length and permissions first, so we don't
786 * have to unmap any previously mapped buffers.
788 for (i = 0; i < numbufs; i++) {
793 * The userland data pointer passed in may not be page
794 * aligned. vmapbuf() truncates the address to a page
795 * boundary, so if the address isn't page aligned, we'll
796 * need enough space for the given transfer length, plus
797 * whatever extra space is necessary to make it to the page
801 (((vm_offset_t)(*data_ptrs[i])) & PAGE_MASK)) > maxmap){
802 printf("cam_periph_mapmem: attempt to map %lu bytes, "
803 "which is greater than %lu\n",
805 (((vm_offset_t)(*data_ptrs[i])) & PAGE_MASK)),
810 if (dirs[i] & CAM_DIR_OUT) {
811 flags[i] = BIO_WRITE;
814 if (dirs[i] & CAM_DIR_IN) {
821 * This keeps the the kernel stack of current thread from getting
822 * swapped. In low-memory situations where the kernel stack might
823 * otherwise get swapped out, this holds it and allows the thread
824 * to make progress and release the kernel mapped pages sooner.
826 * XXX KDM should I use P_NOSWAP instead?
830 for (i = 0; i < numbufs; i++) {
834 mapinfo->bp[i] = getpbuf(NULL);
836 /* save the buffer's data address */
837 mapinfo->bp[i]->b_saveaddr = mapinfo->bp[i]->b_data;
839 /* put our pointer in the data slot */
840 mapinfo->bp[i]->b_data = *data_ptrs[i];
842 /* set the transfer length, we know it's < MAXPHYS */
843 mapinfo->bp[i]->b_bufsize = lengths[i];
845 /* set the direction */
846 mapinfo->bp[i]->b_iocmd = flags[i];
849 * Map the buffer into kernel memory.
851 * Note that useracc() alone is not a sufficient test.
852 * vmapbuf() can still fail due to a smaller file mapped
853 * into a larger area of VM, or if userland races against
854 * vmapbuf() after the useracc() check.
856 if (vmapbuf(mapinfo->bp[i], 1) < 0) {
857 for (j = 0; j < i; ++j) {
858 *data_ptrs[j] = mapinfo->bp[j]->b_saveaddr;
859 vunmapbuf(mapinfo->bp[j]);
860 relpbuf(mapinfo->bp[j], NULL);
862 relpbuf(mapinfo->bp[i], NULL);
867 /* set our pointer to the new mapped area */
868 *data_ptrs[i] = mapinfo->bp[i]->b_data;
870 mapinfo->num_bufs_used++;
874 * Now that we've gotten this far, change ownership to the kernel
875 * of the buffers so that we don't run afoul of returning to user
876 * space with locks (on the buffer) held.
878 for (i = 0; i < numbufs; i++) {
879 BUF_KERNPROC(mapinfo->bp[i]);
887 * Unmap memory segments mapped into kernel virtual address space by
888 * cam_periph_mapmem().
891 cam_periph_unmapmem(union ccb *ccb, struct cam_periph_map_info *mapinfo)
894 u_int8_t **data_ptrs[CAM_PERIPH_MAXMAPS];
896 if (mapinfo->num_bufs_used <= 0) {
897 /* nothing to free and the process wasn't held. */
901 switch (ccb->ccb_h.func_code) {
903 numbufs = min(mapinfo->num_bufs_used, 2);
906 data_ptrs[0] = (u_int8_t **)&ccb->cdm.matches;
908 data_ptrs[0] = (u_int8_t **)&ccb->cdm.patterns;
909 data_ptrs[1] = (u_int8_t **)&ccb->cdm.matches;
913 case XPT_CONT_TARGET_IO:
914 data_ptrs[0] = &ccb->csio.data_ptr;
915 numbufs = min(mapinfo->num_bufs_used, 1);
918 data_ptrs[0] = &ccb->ataio.data_ptr;
919 numbufs = min(mapinfo->num_bufs_used, 1);
922 numbufs = min(mapinfo->num_bufs_used, 2);
923 data_ptrs[0] = &ccb->smpio.smp_request;
924 data_ptrs[1] = &ccb->smpio.smp_response;
926 case XPT_DEV_ADVINFO:
927 numbufs = min(mapinfo->num_bufs_used, 1);
928 data_ptrs[0] = (uint8_t **)&ccb->cdai.buf;
931 /* allow ourselves to be swapped once again */
934 break; /* NOTREACHED */
937 for (i = 0; i < numbufs; i++) {
938 /* Set the user's pointer back to the original value */
939 *data_ptrs[i] = mapinfo->bp[i]->b_saveaddr;
941 /* unmap the buffer */
942 vunmapbuf(mapinfo->bp[i]);
944 /* release the buffer */
945 relpbuf(mapinfo->bp[i], NULL);
948 /* allow ourselves to be swapped once again */
953 cam_periph_ccbwait(union ccb *ccb)
956 if ((ccb->ccb_h.pinfo.index != CAM_UNQUEUED_INDEX)
957 || ((ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_INPROG))
958 xpt_path_sleep(ccb->ccb_h.path, &ccb->ccb_h.cbfcnp, PRIBIO,
963 cam_periph_ioctl(struct cam_periph *periph, u_long cmd, caddr_t addr,
964 int (*error_routine)(union ccb *ccb,
966 u_int32_t sense_flags))
976 ccb = cam_periph_getccb(periph, CAM_PRIORITY_NORMAL);
977 xpt_setup_ccb(&ccb->ccb_h,
979 CAM_PRIORITY_NORMAL);
980 ccb->ccb_h.func_code = XPT_GDEVLIST;
983 * Basically, the point of this is that we go through
984 * getting the list of devices, until we find a passthrough
985 * device. In the current version of the CAM code, the
986 * only way to determine what type of device we're dealing
987 * with is by its name.
991 ccb->cgdl.status = CAM_GDEVLIST_MORE_DEVS;
992 while (ccb->cgdl.status == CAM_GDEVLIST_MORE_DEVS) {
994 /* we want the next device in the list */
996 if (strncmp(ccb->cgdl.periph_name,
1002 if ((ccb->cgdl.status == CAM_GDEVLIST_LAST_DEVICE) &&
1004 ccb->cgdl.periph_name[0] = '\0';
1005 ccb->cgdl.unit_number = 0;
1010 /* copy the result back out */
1011 bcopy(ccb, addr, sizeof(union ccb));
1013 /* and release the ccb */
1014 xpt_release_ccb(ccb);
1025 cam_periph_done(struct cam_periph *periph, union ccb *done_ccb)
1028 /* Caller will release the CCB */
1029 wakeup(&done_ccb->ccb_h.cbfcnp);
1033 cam_periph_runccb(union ccb *ccb,
1034 int (*error_routine)(union ccb *ccb,
1036 u_int32_t sense_flags),
1037 cam_flags camflags, u_int32_t sense_flags,
1042 xpt_path_assert(ccb->ccb_h.path, MA_OWNED);
1045 * If the user has supplied a stats structure, and if we understand
1046 * this particular type of ccb, record the transaction start.
1048 if ((ds != NULL) && (ccb->ccb_h.func_code == XPT_SCSI_IO ||
1049 ccb->ccb_h.func_code == XPT_ATA_IO))
1050 devstat_start_transaction(ds, NULL);
1052 ccb->ccb_h.cbfcnp = cam_periph_done;
1056 cam_periph_ccbwait(ccb);
1057 if ((ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP)
1059 else if (error_routine != NULL)
1060 error = (*error_routine)(ccb, camflags, sense_flags);
1064 } while (error == ERESTART);
1066 if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) {
1067 cam_release_devq(ccb->ccb_h.path,
1068 /* relsim_flags */0,
1071 /* getcount_only */ FALSE);
1072 ccb->ccb_h.status &= ~CAM_DEV_QFRZN;
1076 if (ccb->ccb_h.func_code == XPT_SCSI_IO) {
1077 devstat_end_transaction(ds,
1078 ccb->csio.dxfer_len,
1079 ccb->csio.tag_action & 0x3,
1080 ((ccb->ccb_h.flags & CAM_DIR_MASK) ==
1081 CAM_DIR_NONE) ? DEVSTAT_NO_DATA :
1082 (ccb->ccb_h.flags & CAM_DIR_OUT) ?
1084 DEVSTAT_READ, NULL, NULL);
1085 } else if (ccb->ccb_h.func_code == XPT_ATA_IO) {
1086 devstat_end_transaction(ds,
1087 ccb->ataio.dxfer_len,
1088 ccb->ataio.tag_action & 0x3,
1089 ((ccb->ccb_h.flags & CAM_DIR_MASK) ==
1090 CAM_DIR_NONE) ? DEVSTAT_NO_DATA :
1091 (ccb->ccb_h.flags & CAM_DIR_OUT) ?
1093 DEVSTAT_READ, NULL, NULL);
1101 cam_freeze_devq(struct cam_path *path)
1103 struct ccb_hdr ccb_h;
1105 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("cam_freeze_devq\n"));
1106 xpt_setup_ccb(&ccb_h, path, /*priority*/1);
1107 ccb_h.func_code = XPT_NOOP;
1108 ccb_h.flags = CAM_DEV_QFREEZE;
1109 xpt_action((union ccb *)&ccb_h);
1113 cam_release_devq(struct cam_path *path, u_int32_t relsim_flags,
1114 u_int32_t openings, u_int32_t arg,
1117 struct ccb_relsim crs;
1119 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("cam_release_devq(%u, %u, %u, %d)\n",
1120 relsim_flags, openings, arg, getcount_only));
1121 xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL);
1122 crs.ccb_h.func_code = XPT_REL_SIMQ;
1123 crs.ccb_h.flags = getcount_only ? CAM_DEV_QFREEZE : 0;
1124 crs.release_flags = relsim_flags;
1125 crs.openings = openings;
1126 crs.release_timeout = arg;
1127 xpt_action((union ccb *)&crs);
1128 return (crs.qfrozen_cnt);
1131 #define saved_ccb_ptr ppriv_ptr0
1133 camperiphdone(struct cam_periph *periph, union ccb *done_ccb)
1135 union ccb *saved_ccb;
1137 struct scsi_start_stop_unit *scsi_cmd;
1138 int error_code, sense_key, asc, ascq;
1140 scsi_cmd = (struct scsi_start_stop_unit *)
1141 &done_ccb->csio.cdb_io.cdb_bytes;
1142 status = done_ccb->ccb_h.status;
1144 if ((status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
1145 if (scsi_extract_sense_ccb(done_ccb,
1146 &error_code, &sense_key, &asc, &ascq)) {
1148 * If the error is "invalid field in CDB",
1149 * and the load/eject flag is set, turn the
1150 * flag off and try again. This is just in
1151 * case the drive in question barfs on the
1152 * load eject flag. The CAM code should set
1153 * the load/eject flag by default for
1156 if ((scsi_cmd->opcode == START_STOP_UNIT) &&
1157 ((scsi_cmd->how & SSS_LOEJ) != 0) &&
1158 (asc == 0x24) && (ascq == 0x00)) {
1159 scsi_cmd->how &= ~SSS_LOEJ;
1160 if (status & CAM_DEV_QFRZN) {
1161 cam_release_devq(done_ccb->ccb_h.path,
1163 done_ccb->ccb_h.status &=
1166 xpt_action(done_ccb);
1170 if (cam_periph_error(done_ccb,
1171 0, SF_RETRY_UA | SF_NO_PRINT, NULL) == ERESTART)
1173 if (done_ccb->ccb_h.status & CAM_DEV_QFRZN) {
1174 cam_release_devq(done_ccb->ccb_h.path, 0, 0, 0, 0);
1175 done_ccb->ccb_h.status &= ~CAM_DEV_QFRZN;
1179 * If we have successfully taken a device from the not
1180 * ready to ready state, re-scan the device and re-get
1181 * the inquiry information. Many devices (mostly disks)
1182 * don't properly report their inquiry information unless
1185 if (scsi_cmd->opcode == START_STOP_UNIT)
1186 xpt_async(AC_INQ_CHANGED, done_ccb->ccb_h.path, NULL);
1190 * Perform the final retry with the original CCB so that final
1191 * error processing is performed by the owner of the CCB.
1193 saved_ccb = (union ccb *)done_ccb->ccb_h.saved_ccb_ptr;
1194 bcopy(saved_ccb, done_ccb, sizeof(*done_ccb));
1195 xpt_free_ccb(saved_ccb);
1196 if (done_ccb->ccb_h.cbfcnp != camperiphdone)
1197 periph->flags &= ~CAM_PERIPH_RECOVERY_INPROG;
1198 xpt_action(done_ccb);
1201 /* Drop freeze taken due to CAM_DEV_QFREEZE flag set. */
1202 cam_release_devq(done_ccb->ccb_h.path, 0, 0, 0, 0);
1206 * Generic Async Event handler. Peripheral drivers usually
1207 * filter out the events that require personal attention,
1208 * and leave the rest to this function.
1211 cam_periph_async(struct cam_periph *periph, u_int32_t code,
1212 struct cam_path *path, void *arg)
1215 case AC_LOST_DEVICE:
1216 cam_periph_invalidate(periph);
1224 cam_periph_bus_settle(struct cam_periph *periph, u_int bus_settle)
1226 struct ccb_getdevstats cgds;
1228 xpt_setup_ccb(&cgds.ccb_h, periph->path, CAM_PRIORITY_NORMAL);
1229 cgds.ccb_h.func_code = XPT_GDEV_STATS;
1230 xpt_action((union ccb *)&cgds);
1231 cam_periph_freeze_after_event(periph, &cgds.last_reset, bus_settle);
1235 cam_periph_freeze_after_event(struct cam_periph *periph,
1236 struct timeval* event_time, u_int duration_ms)
1238 struct timeval delta;
1239 struct timeval duration_tv;
1241 if (!timevalisset(event_time))
1245 timevalsub(&delta, event_time);
1246 duration_tv.tv_sec = duration_ms / 1000;
1247 duration_tv.tv_usec = (duration_ms % 1000) * 1000;
1248 if (timevalcmp(&delta, &duration_tv, <)) {
1249 timevalsub(&duration_tv, &delta);
1251 duration_ms = duration_tv.tv_sec * 1000;
1252 duration_ms += duration_tv.tv_usec / 1000;
1253 cam_freeze_devq(periph->path);
1254 cam_release_devq(periph->path,
1255 RELSIM_RELEASE_AFTER_TIMEOUT,
1257 /*timeout*/duration_ms,
1258 /*getcount_only*/0);
1264 camperiphscsistatuserror(union ccb *ccb, union ccb **orig_ccb,
1265 cam_flags camflags, u_int32_t sense_flags,
1266 int *openings, u_int32_t *relsim_flags,
1267 u_int32_t *timeout, u_int32_t *action, const char **action_string)
1271 switch (ccb->csio.scsi_status) {
1272 case SCSI_STATUS_OK:
1273 case SCSI_STATUS_COND_MET:
1274 case SCSI_STATUS_INTERMED:
1275 case SCSI_STATUS_INTERMED_COND_MET:
1278 case SCSI_STATUS_CMD_TERMINATED:
1279 case SCSI_STATUS_CHECK_COND:
1280 error = camperiphscsisenseerror(ccb, orig_ccb,
1289 case SCSI_STATUS_QUEUE_FULL:
1292 struct ccb_getdevstats cgds;
1295 * First off, find out what the current
1296 * transaction counts are.
1298 xpt_setup_ccb(&cgds.ccb_h,
1300 CAM_PRIORITY_NORMAL);
1301 cgds.ccb_h.func_code = XPT_GDEV_STATS;
1302 xpt_action((union ccb *)&cgds);
1305 * If we were the only transaction active, treat
1306 * the QUEUE FULL as if it were a BUSY condition.
1308 if (cgds.dev_active != 0) {
1312 * Reduce the number of openings to
1313 * be 1 less than the amount it took
1314 * to get a queue full bounded by the
1315 * minimum allowed tag count for this
1318 total_openings = cgds.dev_active + cgds.dev_openings;
1319 *openings = cgds.dev_active;
1320 if (*openings < cgds.mintags)
1321 *openings = cgds.mintags;
1322 if (*openings < total_openings)
1323 *relsim_flags = RELSIM_ADJUST_OPENINGS;
1326 * Some devices report queue full for
1327 * temporary resource shortages. For
1328 * this reason, we allow a minimum
1329 * tag count to be entered via a
1330 * quirk entry to prevent the queue
1331 * count on these devices from falling
1332 * to a pessimisticly low value. We
1333 * still wait for the next successful
1334 * completion, however, before queueing
1335 * more transactions to the device.
1337 *relsim_flags = RELSIM_RELEASE_AFTER_CMDCMPLT;
1341 *action &= ~SSQ_PRINT_SENSE;
1346 case SCSI_STATUS_BUSY:
1348 * Restart the queue after either another
1349 * command completes or a 1 second timeout.
1351 if (ccb->ccb_h.retry_count > 0) {
1352 ccb->ccb_h.retry_count--;
1354 *relsim_flags = RELSIM_RELEASE_AFTER_TIMEOUT
1355 | RELSIM_RELEASE_AFTER_CMDCMPLT;
1361 case SCSI_STATUS_RESERV_CONFLICT:
1370 camperiphscsisenseerror(union ccb *ccb, union ccb **orig,
1371 cam_flags camflags, u_int32_t sense_flags,
1372 int *openings, u_int32_t *relsim_flags,
1373 u_int32_t *timeout, u_int32_t *action, const char **action_string)
1375 struct cam_periph *periph;
1376 union ccb *orig_ccb = ccb;
1377 int error, recoveryccb;
1379 periph = xpt_path_periph(ccb->ccb_h.path);
1380 recoveryccb = (ccb->ccb_h.cbfcnp == camperiphdone);
1381 if ((periph->flags & CAM_PERIPH_RECOVERY_INPROG) && !recoveryccb) {
1383 * If error recovery is already in progress, don't attempt
1384 * to process this error, but requeue it unconditionally
1385 * and attempt to process it once error recovery has
1386 * completed. This failed command is probably related to
1387 * the error that caused the currently active error recovery
1388 * action so our current recovery efforts should also
1389 * address this command. Be aware that the error recovery
1390 * code assumes that only one recovery action is in progress
1391 * on a particular peripheral instance at any given time
1392 * (e.g. only one saved CCB for error recovery) so it is
1393 * imperitive that we don't violate this assumption.
1396 *action &= ~SSQ_PRINT_SENSE;
1398 scsi_sense_action err_action;
1399 struct ccb_getdev cgd;
1402 * Grab the inquiry data for this device.
1404 xpt_setup_ccb(&cgd.ccb_h, ccb->ccb_h.path, CAM_PRIORITY_NORMAL);
1405 cgd.ccb_h.func_code = XPT_GDEV_TYPE;
1406 xpt_action((union ccb *)&cgd);
1408 err_action = scsi_error_action(&ccb->csio, &cgd.inq_data,
1410 error = err_action & SS_ERRMASK;
1413 * Do not autostart sequential access devices
1414 * to avoid unexpected tape loading.
1416 if ((err_action & SS_MASK) == SS_START &&
1417 SID_TYPE(&cgd.inq_data) == T_SEQUENTIAL) {
1418 *action_string = "Will not autostart a "
1419 "sequential access device";
1420 goto sense_error_done;
1424 * Avoid recovery recursion if recovery action is the same.
1426 if ((err_action & SS_MASK) >= SS_START && recoveryccb) {
1427 if (((err_action & SS_MASK) == SS_START &&
1428 ccb->csio.cdb_io.cdb_bytes[0] == START_STOP_UNIT) ||
1429 ((err_action & SS_MASK) == SS_TUR &&
1430 (ccb->csio.cdb_io.cdb_bytes[0] == TEST_UNIT_READY))) {
1431 err_action = SS_RETRY|SSQ_DECREMENT_COUNT|EIO;
1432 *relsim_flags = RELSIM_RELEASE_AFTER_TIMEOUT;
1438 * If the recovery action will consume a retry,
1439 * make sure we actually have retries available.
1441 if ((err_action & SSQ_DECREMENT_COUNT) != 0) {
1442 if (ccb->ccb_h.retry_count > 0 &&
1443 (periph->flags & CAM_PERIPH_INVALID) == 0)
1444 ccb->ccb_h.retry_count--;
1446 *action_string = "Retries exhausted";
1447 goto sense_error_done;
1451 if ((err_action & SS_MASK) >= SS_START) {
1453 * Do common portions of commands that
1454 * use recovery CCBs.
1456 orig_ccb = xpt_alloc_ccb_nowait();
1457 if (orig_ccb == NULL) {
1458 *action_string = "Can't allocate recovery CCB";
1459 goto sense_error_done;
1462 * Clear freeze flag for original request here, as
1463 * this freeze will be dropped as part of ERESTART.
1465 ccb->ccb_h.status &= ~CAM_DEV_QFRZN;
1466 bcopy(ccb, orig_ccb, sizeof(*orig_ccb));
1469 switch (err_action & SS_MASK) {
1471 *action_string = "No recovery action needed";
1475 *action_string = "Retrying command (per sense data)";
1479 *action_string = "Unretryable error";
1486 * Send a start unit command to the device, and
1487 * then retry the command.
1489 *action_string = "Attempting to start unit";
1490 periph->flags |= CAM_PERIPH_RECOVERY_INPROG;
1493 * Check for removable media and set
1494 * load/eject flag appropriately.
1496 if (SID_IS_REMOVABLE(&cgd.inq_data))
1501 scsi_start_stop(&ccb->csio,
1515 * Send a Test Unit Ready to the device.
1516 * If the 'many' flag is set, we send 120
1517 * test unit ready commands, one every half
1518 * second. Otherwise, we just send one TUR.
1519 * We only want to do this if the retry
1520 * count has not been exhausted.
1524 if ((err_action & SSQ_MANY) != 0) {
1525 *action_string = "Polling device for readiness";
1528 *action_string = "Testing device for readiness";
1531 periph->flags |= CAM_PERIPH_RECOVERY_INPROG;
1532 scsi_test_unit_ready(&ccb->csio,
1540 * Accomplish our 500ms delay by deferring
1541 * the release of our device queue appropriately.
1543 *relsim_flags = RELSIM_RELEASE_AFTER_TIMEOUT;
1548 panic("Unhandled error action %x", err_action);
1551 if ((err_action & SS_MASK) >= SS_START) {
1553 * Drop the priority, so that the recovery
1554 * CCB is the first to execute. Freeze the queue
1555 * after this command is sent so that we can
1556 * restore the old csio and have it queued in
1557 * the proper order before we release normal
1558 * transactions to the device.
1560 ccb->ccb_h.pinfo.priority--;
1561 ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
1562 ccb->ccb_h.saved_ccb_ptr = orig_ccb;
1568 *action = err_action;
1574 * Generic error handler. Peripheral drivers usually filter
1575 * out the errors that they handle in a unique mannor, then
1576 * call this function.
1579 cam_periph_error(union ccb *ccb, cam_flags camflags,
1580 u_int32_t sense_flags, union ccb *save_ccb)
1582 struct cam_path *newpath;
1583 union ccb *orig_ccb, *scan_ccb;
1584 struct cam_periph *periph;
1585 const char *action_string;
1587 int frozen, error, openings;
1588 u_int32_t action, relsim_flags, timeout;
1590 action = SSQ_PRINT_SENSE;
1591 periph = xpt_path_periph(ccb->ccb_h.path);
1592 action_string = NULL;
1593 status = ccb->ccb_h.status;
1594 frozen = (status & CAM_DEV_QFRZN) != 0;
1595 status &= CAM_STATUS_MASK;
1596 openings = relsim_flags = timeout = 0;
1602 action &= ~SSQ_PRINT_SENSE;
1604 case CAM_SCSI_STATUS_ERROR:
1605 error = camperiphscsistatuserror(ccb, &orig_ccb,
1606 camflags, sense_flags, &openings, &relsim_flags,
1607 &timeout, &action, &action_string);
1609 case CAM_AUTOSENSE_FAIL:
1610 error = EIO; /* we have to kill the command */
1614 case CAM_MSG_REJECT_REC:
1615 /* XXX Don't know that these are correct */
1618 case CAM_SEL_TIMEOUT:
1619 if ((camflags & CAM_RETRY_SELTO) != 0) {
1620 if (ccb->ccb_h.retry_count > 0 &&
1621 (periph->flags & CAM_PERIPH_INVALID) == 0) {
1622 ccb->ccb_h.retry_count--;
1626 * Wait a bit to give the device
1627 * time to recover before we try again.
1629 relsim_flags = RELSIM_RELEASE_AFTER_TIMEOUT;
1630 timeout = periph_selto_delay;
1633 action_string = "Retries exhausted";
1636 case CAM_DEV_NOT_THERE:
1640 case CAM_REQ_INVALID:
1641 case CAM_PATH_INVALID:
1643 case CAM_PROVIDE_FAIL:
1644 case CAM_REQ_TOO_BIG:
1645 case CAM_LUN_INVALID:
1646 case CAM_TID_INVALID:
1649 case CAM_SCSI_BUS_RESET:
1652 * Commands that repeatedly timeout and cause these
1653 * kinds of error recovery actions, should return
1654 * CAM_CMD_TIMEOUT, which allows us to safely assume
1655 * that this command was an innocent bystander to
1656 * these events and should be unconditionally
1659 case CAM_REQUEUE_REQ:
1660 /* Unconditional requeue if device is still there */
1661 if (periph->flags & CAM_PERIPH_INVALID) {
1662 action_string = "Periph was invalidated";
1664 } else if (sense_flags & SF_NO_RETRY) {
1666 action_string = "Retry was blocked";
1669 action &= ~SSQ_PRINT_SENSE;
1672 case CAM_RESRC_UNAVAIL:
1673 /* Wait a bit for the resource shortage to abate. */
1674 timeout = periph_noresrc_delay;
1678 /* Wait a bit for the busy condition to abate. */
1679 timeout = periph_busy_delay;
1681 relsim_flags = RELSIM_RELEASE_AFTER_TIMEOUT;
1683 case CAM_ATA_STATUS_ERROR:
1684 case CAM_REQ_CMP_ERR:
1685 case CAM_CMD_TIMEOUT:
1686 case CAM_UNEXP_BUSFREE:
1687 case CAM_UNCOR_PARITY:
1688 case CAM_DATA_RUN_ERR:
1690 if (periph->flags & CAM_PERIPH_INVALID) {
1692 action_string = "Periph was invalidated";
1693 } else if (ccb->ccb_h.retry_count == 0) {
1695 action_string = "Retries exhausted";
1696 } else if (sense_flags & SF_NO_RETRY) {
1698 action_string = "Retry was blocked";
1700 ccb->ccb_h.retry_count--;
1706 if ((sense_flags & SF_PRINT_ALWAYS) ||
1707 CAM_DEBUGGED(ccb->ccb_h.path, CAM_DEBUG_INFO))
1708 action |= SSQ_PRINT_SENSE;
1709 else if (sense_flags & SF_NO_PRINT)
1710 action &= ~SSQ_PRINT_SENSE;
1711 if ((action & SSQ_PRINT_SENSE) != 0)
1712 cam_error_print(orig_ccb, CAM_ESF_ALL, CAM_EPF_ALL);
1713 if (error != 0 && (action & SSQ_PRINT_SENSE) != 0) {
1714 if (error != ERESTART) {
1715 if (action_string == NULL)
1716 action_string = "Unretryable error";
1717 xpt_print(ccb->ccb_h.path, "Error %d, %s\n",
1718 error, action_string);
1719 } else if (action_string != NULL)
1720 xpt_print(ccb->ccb_h.path, "%s\n", action_string);
1722 xpt_print(ccb->ccb_h.path, "Retrying command\n");
1725 if ((action & SSQ_LOST) != 0) {
1729 * For a selection timeout, we consider all of the LUNs on
1730 * the target to be gone. If the status is CAM_DEV_NOT_THERE,
1731 * then we only get rid of the device(s) specified by the
1732 * path in the original CCB.
1734 if (status == CAM_SEL_TIMEOUT)
1735 lun_id = CAM_LUN_WILDCARD;
1737 lun_id = xpt_path_lun_id(ccb->ccb_h.path);
1739 /* Should we do more if we can't create the path?? */
1740 if (xpt_create_path(&newpath, periph,
1741 xpt_path_path_id(ccb->ccb_h.path),
1742 xpt_path_target_id(ccb->ccb_h.path),
1743 lun_id) == CAM_REQ_CMP) {
1746 * Let peripheral drivers know that this
1747 * device has gone away.
1749 xpt_async(AC_LOST_DEVICE, newpath, NULL);
1750 xpt_free_path(newpath);
1754 /* Broadcast UNIT ATTENTIONs to all periphs. */
1755 if ((action & SSQ_UA) != 0)
1756 xpt_async(AC_UNIT_ATTENTION, orig_ccb->ccb_h.path, orig_ccb);
1758 /* Rescan target on "Reported LUNs data has changed" */
1759 if ((action & SSQ_RESCAN) != 0) {
1760 if (xpt_create_path(&newpath, NULL,
1761 xpt_path_path_id(ccb->ccb_h.path),
1762 xpt_path_target_id(ccb->ccb_h.path),
1763 CAM_LUN_WILDCARD) == CAM_REQ_CMP) {
1765 scan_ccb = xpt_alloc_ccb_nowait();
1766 if (scan_ccb != NULL) {
1767 scan_ccb->ccb_h.path = newpath;
1768 scan_ccb->ccb_h.func_code = XPT_SCAN_TGT;
1769 scan_ccb->crcn.flags = 0;
1770 xpt_rescan(scan_ccb);
1773 "Can't allocate CCB to rescan target\n");
1774 xpt_free_path(newpath);
1779 /* Attempt a retry */
1780 if (error == ERESTART || error == 0) {
1782 ccb->ccb_h.status &= ~CAM_DEV_QFRZN;
1783 if (error == ERESTART)
1786 cam_release_devq(ccb->ccb_h.path,
1790 /*getcount_only*/0);