2 * Implementation of the Common Access Method Transport (XPT) layer.
4 * Copyright (c) 1997, 1998, 1999 Justin T. Gibbs.
5 * Copyright (c) 1997, 1998, 1999 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>
35 #include <sys/systm.h>
36 #include <sys/types.h>
37 #include <sys/malloc.h>
38 #include <sys/kernel.h>
41 #include <sys/fcntl.h>
42 #include <sys/interrupt.h>
46 #include <sys/taskqueue.h>
49 #include <sys/mutex.h>
50 #include <sys/sysctl.h>
51 #include <sys/kthread.h>
54 #include <cam/cam_ccb.h>
55 #include <cam/cam_periph.h>
56 #include <cam/cam_queue.h>
57 #include <cam/cam_sim.h>
58 #include <cam/cam_xpt.h>
59 #include <cam/cam_xpt_sim.h>
60 #include <cam/cam_xpt_periph.h>
61 #include <cam/cam_xpt_internal.h>
62 #include <cam/cam_debug.h>
63 #include <cam/cam_compat.h>
65 #include <cam/scsi/scsi_all.h>
66 #include <cam/scsi/scsi_message.h>
67 #include <cam/scsi/scsi_pass.h>
69 #include <machine/md_var.h> /* geometry translation */
70 #include <machine/stdarg.h> /* for xpt_print below */
75 * This is the maximum number of high powered commands (e.g. start unit)
76 * that can be outstanding at a particular time.
78 #ifndef CAM_MAX_HIGHPOWER
79 #define CAM_MAX_HIGHPOWER 4
82 /* Datastructures internal to the xpt layer */
83 MALLOC_DEFINE(M_CAMXPT, "CAM XPT", "CAM XPT buffers");
84 MALLOC_DEFINE(M_CAMDEV, "CAM DEV", "CAM devices");
85 MALLOC_DEFINE(M_CAMCCB, "CAM CCB", "CAM CCBs");
86 MALLOC_DEFINE(M_CAMPATH, "CAM path", "CAM paths");
88 /* Object for defering XPT actions to a taskqueue */
96 /* number of high powered commands that can go through right now */
97 struct mtx xpt_highpower_lock;
98 STAILQ_HEAD(highpowerlist, cam_ed) highpowerq;
101 /* queue for handling async rescan requests. */
102 TAILQ_HEAD(, ccb_hdr) ccb_scanq;
104 int buses_config_done;
106 /* Registered busses */
107 TAILQ_HEAD(,cam_eb) xpt_busses;
108 u_int bus_generation;
110 struct intr_config_hook *xpt_config_hook;
113 struct callout boot_callout;
115 struct mtx xpt_topo_lock;
117 struct taskqueue *xpt_taskq;
122 DM_RET_FLAG_MASK = 0x0f,
125 DM_RET_DESCEND = 0x20,
127 DM_RET_ACTION_MASK = 0xf0
135 } xpt_traverse_depth;
137 struct xpt_traverse_config {
138 xpt_traverse_depth depth;
143 typedef int xpt_busfunc_t (struct cam_eb *bus, void *arg);
144 typedef int xpt_targetfunc_t (struct cam_et *target, void *arg);
145 typedef int xpt_devicefunc_t (struct cam_ed *device, void *arg);
146 typedef int xpt_periphfunc_t (struct cam_periph *periph, void *arg);
147 typedef int xpt_pdrvfunc_t (struct periph_driver **pdrv, void *arg);
149 /* Transport layer configuration information */
150 static struct xpt_softc xsoftc;
152 TUNABLE_INT("kern.cam.boot_delay", &xsoftc.boot_delay);
153 SYSCTL_INT(_kern_cam, OID_AUTO, boot_delay, CTLFLAG_RDTUN,
154 &xsoftc.boot_delay, 0, "Bus registration wait time");
157 struct mtx_padalign cam_doneq_mtx;
158 STAILQ_HEAD(, ccb_hdr) cam_doneq;
162 static struct cam_doneq cam_doneqs[MAXCPU];
163 static int cam_num_doneqs;
164 static struct proc *cam_proc;
166 TUNABLE_INT("kern.cam.num_doneqs", &cam_num_doneqs);
167 SYSCTL_INT(_kern_cam, OID_AUTO, num_doneqs, CTLFLAG_RDTUN,
168 &cam_num_doneqs, 0, "Number of completion queues/threads");
170 struct cam_periph *xpt_periph;
172 static periph_init_t xpt_periph_init;
174 static struct periph_driver xpt_driver =
176 xpt_periph_init, "xpt",
177 TAILQ_HEAD_INITIALIZER(xpt_driver.units), /* generation */ 0,
181 PERIPHDRIVER_DECLARE(xpt, xpt_driver);
183 static d_open_t xptopen;
184 static d_close_t xptclose;
185 static d_ioctl_t xptioctl;
186 static d_ioctl_t xptdoioctl;
188 static struct cdevsw xpt_cdevsw = {
189 .d_version = D_VERSION,
197 /* Storage for debugging datastructures */
198 struct cam_path *cam_dpath;
199 u_int32_t cam_dflags = CAM_DEBUG_FLAGS;
200 TUNABLE_INT("kern.cam.dflags", &cam_dflags);
201 SYSCTL_UINT(_kern_cam, OID_AUTO, dflags, CTLFLAG_RW,
202 &cam_dflags, 0, "Enabled debug flags");
203 u_int32_t cam_debug_delay = CAM_DEBUG_DELAY;
204 TUNABLE_INT("kern.cam.debug_delay", &cam_debug_delay);
205 SYSCTL_UINT(_kern_cam, OID_AUTO, debug_delay, CTLFLAG_RW,
206 &cam_debug_delay, 0, "Delay in us after each debug message");
208 /* Our boot-time initialization hook */
209 static int cam_module_event_handler(module_t, int /*modeventtype_t*/, void *);
211 static moduledata_t cam_moduledata = {
213 cam_module_event_handler,
217 static int xpt_init(void *);
219 DECLARE_MODULE(cam, cam_moduledata, SI_SUB_CONFIGURE, SI_ORDER_SECOND);
220 MODULE_VERSION(cam, 1);
223 static void xpt_async_bcast(struct async_list *async_head,
224 u_int32_t async_code,
225 struct cam_path *path,
227 static path_id_t xptnextfreepathid(void);
228 static path_id_t xptpathid(const char *sim_name, int sim_unit, int sim_bus);
229 static union ccb *xpt_get_ccb(struct cam_periph *periph);
230 static union ccb *xpt_get_ccb_nowait(struct cam_periph *periph);
231 static void xpt_run_allocq(struct cam_periph *periph, int sleep);
232 static void xpt_run_allocq_task(void *context, int pending);
233 static void xpt_run_devq(struct cam_devq *devq);
234 static timeout_t xpt_release_devq_timeout;
235 static void xpt_release_simq_timeout(void *arg) __unused;
236 static void xpt_acquire_bus(struct cam_eb *bus);
237 static void xpt_release_bus(struct cam_eb *bus);
238 static uint32_t xpt_freeze_devq_device(struct cam_ed *dev, u_int count);
239 static int xpt_release_devq_device(struct cam_ed *dev, u_int count,
241 static struct cam_et*
242 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id);
243 static void xpt_acquire_target(struct cam_et *target);
244 static void xpt_release_target(struct cam_et *target);
245 static struct cam_eb*
246 xpt_find_bus(path_id_t path_id);
247 static struct cam_et*
248 xpt_find_target(struct cam_eb *bus, target_id_t target_id);
249 static struct cam_ed*
250 xpt_find_device(struct cam_et *target, lun_id_t lun_id);
251 static void xpt_config(void *arg);
252 static int xpt_schedule_dev(struct camq *queue, cam_pinfo *dev_pinfo,
253 u_int32_t new_priority);
254 static xpt_devicefunc_t xptpassannouncefunc;
255 static void xptaction(struct cam_sim *sim, union ccb *work_ccb);
256 static void xptpoll(struct cam_sim *sim);
257 static void camisr_runqueue(void);
258 static void xpt_done_process(struct ccb_hdr *ccb_h);
259 static void xpt_done_td(void *);
260 static dev_match_ret xptbusmatch(struct dev_match_pattern *patterns,
261 u_int num_patterns, struct cam_eb *bus);
262 static dev_match_ret xptdevicematch(struct dev_match_pattern *patterns,
264 struct cam_ed *device);
265 static dev_match_ret xptperiphmatch(struct dev_match_pattern *patterns,
267 struct cam_periph *periph);
268 static xpt_busfunc_t xptedtbusfunc;
269 static xpt_targetfunc_t xptedttargetfunc;
270 static xpt_devicefunc_t xptedtdevicefunc;
271 static xpt_periphfunc_t xptedtperiphfunc;
272 static xpt_pdrvfunc_t xptplistpdrvfunc;
273 static xpt_periphfunc_t xptplistperiphfunc;
274 static int xptedtmatch(struct ccb_dev_match *cdm);
275 static int xptperiphlistmatch(struct ccb_dev_match *cdm);
276 static int xptbustraverse(struct cam_eb *start_bus,
277 xpt_busfunc_t *tr_func, void *arg);
278 static int xpttargettraverse(struct cam_eb *bus,
279 struct cam_et *start_target,
280 xpt_targetfunc_t *tr_func, void *arg);
281 static int xptdevicetraverse(struct cam_et *target,
282 struct cam_ed *start_device,
283 xpt_devicefunc_t *tr_func, void *arg);
284 static int xptperiphtraverse(struct cam_ed *device,
285 struct cam_periph *start_periph,
286 xpt_periphfunc_t *tr_func, void *arg);
287 static int xptpdrvtraverse(struct periph_driver **start_pdrv,
288 xpt_pdrvfunc_t *tr_func, void *arg);
289 static int xptpdperiphtraverse(struct periph_driver **pdrv,
290 struct cam_periph *start_periph,
291 xpt_periphfunc_t *tr_func,
293 static xpt_busfunc_t xptdefbusfunc;
294 static xpt_targetfunc_t xptdeftargetfunc;
295 static xpt_devicefunc_t xptdefdevicefunc;
296 static xpt_periphfunc_t xptdefperiphfunc;
297 static void xpt_finishconfig_task(void *context, int pending);
298 static void xpt_dev_async_default(u_int32_t async_code,
300 struct cam_et *target,
301 struct cam_ed *device,
303 static struct cam_ed * xpt_alloc_device_default(struct cam_eb *bus,
304 struct cam_et *target,
306 static xpt_devicefunc_t xptsetasyncfunc;
307 static xpt_busfunc_t xptsetasyncbusfunc;
308 static cam_status xptregister(struct cam_periph *periph,
310 static __inline int device_is_queued(struct cam_ed *device);
313 xpt_schedule_devq(struct cam_devq *devq, struct cam_ed *dev)
317 mtx_assert(&devq->send_mtx, MA_OWNED);
318 if ((dev->ccbq.queue.entries > 0) &&
319 (dev->ccbq.dev_openings > 0) &&
320 (dev->ccbq.queue.qfrozen_cnt == 0)) {
322 * The priority of a device waiting for controller
323 * resources is that of the highest priority CCB
327 xpt_schedule_dev(&devq->send_queue,
329 CAMQ_GET_PRIO(&dev->ccbq.queue));
337 device_is_queued(struct cam_ed *device)
339 return (device->devq_entry.index != CAM_UNQUEUED_INDEX);
345 make_dev(&xpt_cdevsw, 0, UID_ROOT, GID_OPERATOR, 0600, "xpt0");
349 xptopen(struct cdev *dev, int flags, int fmt, struct thread *td)
353 * Only allow read-write access.
355 if (((flags & FWRITE) == 0) || ((flags & FREAD) == 0))
359 * We don't allow nonblocking access.
361 if ((flags & O_NONBLOCK) != 0) {
362 printf("%s: can't do nonblocking access\n", devtoname(dev));
370 xptclose(struct cdev *dev, int flag, int fmt, struct thread *td)
377 * Don't automatically grab the xpt softc lock here even though this is going
378 * through the xpt device. The xpt device is really just a back door for
379 * accessing other devices and SIMs, so the right thing to do is to grab
380 * the appropriate SIM lock once the bus/SIM is located.
383 xptioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
387 if ((error = xptdoioctl(dev, cmd, addr, flag, td)) == ENOTTY) {
388 error = cam_compat_ioctl(dev, cmd, addr, flag, td, xptdoioctl);
394 xptdoioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
402 * For the transport layer CAMIOCOMMAND ioctl, we really only want
403 * to accept CCB types that don't quite make sense to send through a
404 * passthrough driver. XPT_PATH_INQ is an exception to this, as stated
412 inccb = (union ccb *)addr;
414 bus = xpt_find_bus(inccb->ccb_h.path_id);
418 switch (inccb->ccb_h.func_code) {
421 if (inccb->ccb_h.target_id != CAM_TARGET_WILDCARD ||
422 inccb->ccb_h.target_lun != CAM_LUN_WILDCARD) {
423 xpt_release_bus(bus);
428 if (inccb->ccb_h.target_id == CAM_TARGET_WILDCARD ||
429 inccb->ccb_h.target_lun != CAM_LUN_WILDCARD) {
430 xpt_release_bus(bus);
438 switch(inccb->ccb_h.func_code) {
446 ccb = xpt_alloc_ccb();
449 * Create a path using the bus, target, and lun the
452 if (xpt_create_path(&ccb->ccb_h.path, NULL,
453 inccb->ccb_h.path_id,
454 inccb->ccb_h.target_id,
455 inccb->ccb_h.target_lun) !=
461 /* Ensure all of our fields are correct */
462 xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path,
463 inccb->ccb_h.pinfo.priority);
464 xpt_merge_ccb(ccb, inccb);
465 xpt_path_lock(ccb->ccb_h.path);
466 cam_periph_runccb(ccb, NULL, 0, 0, NULL);
467 xpt_path_unlock(ccb->ccb_h.path);
468 bcopy(ccb, inccb, sizeof(union ccb));
469 xpt_free_path(ccb->ccb_h.path);
477 * This is an immediate CCB, so it's okay to
478 * allocate it on the stack.
482 * Create a path using the bus, target, and lun the
485 if (xpt_create_path(&ccb.ccb_h.path, NULL,
486 inccb->ccb_h.path_id,
487 inccb->ccb_h.target_id,
488 inccb->ccb_h.target_lun) !=
493 /* Ensure all of our fields are correct */
494 xpt_setup_ccb(&ccb.ccb_h, ccb.ccb_h.path,
495 inccb->ccb_h.pinfo.priority);
496 xpt_merge_ccb(&ccb, inccb);
498 bcopy(&ccb, inccb, sizeof(union ccb));
499 xpt_free_path(ccb.ccb_h.path);
503 case XPT_DEV_MATCH: {
504 struct cam_periph_map_info mapinfo;
505 struct cam_path *old_path;
508 * We can't deal with physical addresses for this
509 * type of transaction.
511 if ((inccb->ccb_h.flags & CAM_DATA_MASK) !=
518 * Save this in case the caller had it set to
519 * something in particular.
521 old_path = inccb->ccb_h.path;
524 * We really don't need a path for the matching
525 * code. The path is needed because of the
526 * debugging statements in xpt_action(). They
527 * assume that the CCB has a valid path.
529 inccb->ccb_h.path = xpt_periph->path;
531 bzero(&mapinfo, sizeof(mapinfo));
534 * Map the pattern and match buffers into kernel
535 * virtual address space.
537 error = cam_periph_mapmem(inccb, &mapinfo);
540 inccb->ccb_h.path = old_path;
545 * This is an immediate CCB, we can send it on directly.
550 * Map the buffers back into user space.
552 cam_periph_unmapmem(inccb, &mapinfo);
554 inccb->ccb_h.path = old_path;
563 xpt_release_bus(bus);
567 * This is the getpassthru ioctl. It takes a XPT_GDEVLIST ccb as input,
568 * with the periphal driver name and unit name filled in. The other
569 * fields don't really matter as input. The passthrough driver name
570 * ("pass"), and unit number are passed back in the ccb. The current
571 * device generation number, and the index into the device peripheral
572 * driver list, and the status are also passed back. Note that
573 * since we do everything in one pass, unlike the XPT_GDEVLIST ccb,
574 * we never return a status of CAM_GDEVLIST_LIST_CHANGED. It is
575 * (or rather should be) impossible for the device peripheral driver
576 * list to change since we look at the whole thing in one pass, and
577 * we do it with lock protection.
580 case CAMGETPASSTHRU: {
582 struct cam_periph *periph;
583 struct periph_driver **p_drv;
586 int base_periph_found;
588 ccb = (union ccb *)addr;
589 unit = ccb->cgdl.unit_number;
590 name = ccb->cgdl.periph_name;
591 base_periph_found = 0;
594 * Sanity check -- make sure we don't get a null peripheral
597 if (*ccb->cgdl.periph_name == '\0') {
602 /* Keep the list from changing while we traverse it */
605 /* first find our driver in the list of drivers */
606 for (p_drv = periph_drivers; *p_drv != NULL; p_drv++)
607 if (strcmp((*p_drv)->driver_name, name) == 0)
610 if (*p_drv == NULL) {
612 ccb->ccb_h.status = CAM_REQ_CMP_ERR;
613 ccb->cgdl.status = CAM_GDEVLIST_ERROR;
614 *ccb->cgdl.periph_name = '\0';
615 ccb->cgdl.unit_number = 0;
621 * Run through every peripheral instance of this driver
622 * and check to see whether it matches the unit passed
623 * in by the user. If it does, get out of the loops and
624 * find the passthrough driver associated with that
627 for (periph = TAILQ_FIRST(&(*p_drv)->units); periph != NULL;
628 periph = TAILQ_NEXT(periph, unit_links)) {
630 if (periph->unit_number == unit)
634 * If we found the peripheral driver that the user passed
635 * in, go through all of the peripheral drivers for that
636 * particular device and look for a passthrough driver.
638 if (periph != NULL) {
639 struct cam_ed *device;
642 base_periph_found = 1;
643 device = periph->path->device;
644 for (i = 0, periph = SLIST_FIRST(&device->periphs);
646 periph = SLIST_NEXT(periph, periph_links), i++) {
648 * Check to see whether we have a
649 * passthrough device or not.
651 if (strcmp(periph->periph_name, "pass") == 0) {
653 * Fill in the getdevlist fields.
655 strcpy(ccb->cgdl.periph_name,
656 periph->periph_name);
657 ccb->cgdl.unit_number =
659 if (SLIST_NEXT(periph, periph_links))
661 CAM_GDEVLIST_MORE_DEVS;
664 CAM_GDEVLIST_LAST_DEVICE;
665 ccb->cgdl.generation =
669 * Fill in some CCB header fields
670 * that the user may want.
673 periph->path->bus->path_id;
674 ccb->ccb_h.target_id =
675 periph->path->target->target_id;
676 ccb->ccb_h.target_lun =
677 periph->path->device->lun_id;
678 ccb->ccb_h.status = CAM_REQ_CMP;
685 * If the periph is null here, one of two things has
686 * happened. The first possibility is that we couldn't
687 * find the unit number of the particular peripheral driver
688 * that the user is asking about. e.g. the user asks for
689 * the passthrough driver for "da11". We find the list of
690 * "da" peripherals all right, but there is no unit 11.
691 * The other possibility is that we went through the list
692 * of peripheral drivers attached to the device structure,
693 * but didn't find one with the name "pass". Either way,
694 * we return ENOENT, since we couldn't find something.
696 if (periph == NULL) {
697 ccb->ccb_h.status = CAM_REQ_CMP_ERR;
698 ccb->cgdl.status = CAM_GDEVLIST_ERROR;
699 *ccb->cgdl.periph_name = '\0';
700 ccb->cgdl.unit_number = 0;
703 * It is unfortunate that this is even necessary,
704 * but there are many, many clueless users out there.
705 * If this is true, the user is looking for the
706 * passthrough driver, but doesn't have one in his
709 if (base_periph_found == 1) {
710 printf("xptioctl: pass driver is not in the "
712 printf("xptioctl: put \"device pass\" in "
713 "your kernel config file\n");
728 cam_module_event_handler(module_t mod, int what, void *arg)
734 if ((error = xpt_init(NULL)) != 0)
747 xpt_rescan_done(struct cam_periph *periph, union ccb *done_ccb)
750 if (done_ccb->ccb_h.ppriv_ptr1 == NULL) {
751 xpt_free_path(done_ccb->ccb_h.path);
752 xpt_free_ccb(done_ccb);
754 done_ccb->ccb_h.cbfcnp = done_ccb->ccb_h.ppriv_ptr1;
755 (*done_ccb->ccb_h.cbfcnp)(periph, done_ccb);
760 /* thread to handle bus rescans */
762 xpt_scanner_thread(void *dummy)
765 struct cam_path path;
769 if (TAILQ_EMPTY(&xsoftc.ccb_scanq))
770 msleep(&xsoftc.ccb_scanq, &xsoftc.xpt_topo_lock, PRIBIO,
772 if ((ccb = (union ccb *)TAILQ_FIRST(&xsoftc.ccb_scanq)) != NULL) {
773 TAILQ_REMOVE(&xsoftc.ccb_scanq, &ccb->ccb_h, sim_links.tqe);
777 * Since lock can be dropped inside and path freed
778 * by completion callback even before return here,
779 * take our own path copy for reference.
781 xpt_copy_path(&path, ccb->ccb_h.path);
782 xpt_path_lock(&path);
784 xpt_path_unlock(&path);
785 xpt_release_path(&path);
793 xpt_rescan(union ccb *ccb)
797 /* Prepare request */
798 if (ccb->ccb_h.path->target->target_id == CAM_TARGET_WILDCARD &&
799 ccb->ccb_h.path->device->lun_id == CAM_LUN_WILDCARD)
800 ccb->ccb_h.func_code = XPT_SCAN_BUS;
801 else if (ccb->ccb_h.path->target->target_id != CAM_TARGET_WILDCARD &&
802 ccb->ccb_h.path->device->lun_id == CAM_LUN_WILDCARD)
803 ccb->ccb_h.func_code = XPT_SCAN_TGT;
804 else if (ccb->ccb_h.path->target->target_id != CAM_TARGET_WILDCARD &&
805 ccb->ccb_h.path->device->lun_id != CAM_LUN_WILDCARD)
806 ccb->ccb_h.func_code = XPT_SCAN_LUN;
808 xpt_print(ccb->ccb_h.path, "illegal scan path\n");
809 xpt_free_path(ccb->ccb_h.path);
813 ccb->ccb_h.ppriv_ptr1 = ccb->ccb_h.cbfcnp;
814 ccb->ccb_h.cbfcnp = xpt_rescan_done;
815 xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path, CAM_PRIORITY_XPT);
816 /* Don't make duplicate entries for the same paths. */
818 if (ccb->ccb_h.ppriv_ptr1 == NULL) {
819 TAILQ_FOREACH(hdr, &xsoftc.ccb_scanq, sim_links.tqe) {
820 if (xpt_path_comp(hdr->path, ccb->ccb_h.path) == 0) {
821 wakeup(&xsoftc.ccb_scanq);
823 xpt_print(ccb->ccb_h.path, "rescan already queued\n");
824 xpt_free_path(ccb->ccb_h.path);
830 TAILQ_INSERT_TAIL(&xsoftc.ccb_scanq, &ccb->ccb_h, sim_links.tqe);
831 xsoftc.buses_to_config++;
832 wakeup(&xsoftc.ccb_scanq);
836 /* Functions accessed by the peripheral drivers */
838 xpt_init(void *dummy)
840 struct cam_sim *xpt_sim;
841 struct cam_path *path;
842 struct cam_devq *devq;
846 TAILQ_INIT(&xsoftc.xpt_busses);
847 TAILQ_INIT(&xsoftc.ccb_scanq);
848 STAILQ_INIT(&xsoftc.highpowerq);
849 xsoftc.num_highpower = CAM_MAX_HIGHPOWER;
851 mtx_init(&xsoftc.xpt_lock, "XPT lock", NULL, MTX_DEF);
852 mtx_init(&xsoftc.xpt_highpower_lock, "XPT highpower lock", NULL, MTX_DEF);
853 mtx_init(&xsoftc.xpt_topo_lock, "XPT topology lock", NULL, MTX_DEF);
854 xsoftc.xpt_taskq = taskqueue_create("CAM XPT task", M_WAITOK,
855 taskqueue_thread_enqueue, /*context*/&xsoftc.xpt_taskq);
857 #ifdef CAM_BOOT_DELAY
859 * Override this value at compile time to assist our users
860 * who don't use loader to boot a kernel.
862 xsoftc.boot_delay = CAM_BOOT_DELAY;
865 * The xpt layer is, itself, the equivelent of a SIM.
866 * Allow 16 ccbs in the ccb pool for it. This should
867 * give decent parallelism when we probe busses and
868 * perform other XPT functions.
870 devq = cam_simq_alloc(16);
871 xpt_sim = cam_sim_alloc(xptaction,
876 /*mtx*/&xsoftc.xpt_lock,
877 /*max_dev_transactions*/0,
878 /*max_tagged_dev_transactions*/0,
883 mtx_lock(&xsoftc.xpt_lock);
884 if ((status = xpt_bus_register(xpt_sim, NULL, 0)) != CAM_SUCCESS) {
885 mtx_unlock(&xsoftc.xpt_lock);
886 printf("xpt_init: xpt_bus_register failed with status %#x,"
887 " failing attach\n", status);
890 mtx_unlock(&xsoftc.xpt_lock);
893 * Looking at the XPT from the SIM layer, the XPT is
894 * the equivelent of a peripheral driver. Allocate
895 * a peripheral driver entry for us.
897 if ((status = xpt_create_path(&path, NULL, CAM_XPT_PATH_ID,
899 CAM_LUN_WILDCARD)) != CAM_REQ_CMP) {
900 mtx_unlock(&xsoftc.xpt_lock);
901 printf("xpt_init: xpt_create_path failed with status %#x,"
902 " failing attach\n", status);
906 cam_periph_alloc(xptregister, NULL, NULL, NULL, "xpt", CAM_PERIPH_BIO,
907 path, NULL, 0, xpt_sim);
908 xpt_path_unlock(path);
911 if (cam_num_doneqs < 1)
912 cam_num_doneqs = 1 + mp_ncpus / 6;
913 else if (cam_num_doneqs > MAXCPU)
914 cam_num_doneqs = MAXCPU;
915 for (i = 0; i < cam_num_doneqs; i++) {
916 mtx_init(&cam_doneqs[i].cam_doneq_mtx, "CAM doneq", NULL,
918 STAILQ_INIT(&cam_doneqs[i].cam_doneq);
919 error = kproc_kthread_add(xpt_done_td, &cam_doneqs[i],
920 &cam_proc, NULL, 0, 0, "cam", "doneq%d", i);
926 if (cam_num_doneqs < 1) {
927 printf("xpt_init: Cannot init completion queues "
928 "- failing attach\n");
932 * Register a callback for when interrupts are enabled.
934 xsoftc.xpt_config_hook =
935 (struct intr_config_hook *)malloc(sizeof(struct intr_config_hook),
936 M_CAMXPT, M_NOWAIT | M_ZERO);
937 if (xsoftc.xpt_config_hook == NULL) {
938 printf("xpt_init: Cannot malloc config hook "
939 "- failing attach\n");
942 xsoftc.xpt_config_hook->ich_func = xpt_config;
943 if (config_intrhook_establish(xsoftc.xpt_config_hook) != 0) {
944 free (xsoftc.xpt_config_hook, M_CAMXPT);
945 printf("xpt_init: config_intrhook_establish failed "
946 "- failing attach\n");
953 xptregister(struct cam_periph *periph, void *arg)
955 struct cam_sim *xpt_sim;
957 if (periph == NULL) {
958 printf("xptregister: periph was NULL!!\n");
959 return(CAM_REQ_CMP_ERR);
962 xpt_sim = (struct cam_sim *)arg;
963 xpt_sim->softc = periph;
965 periph->softc = NULL;
971 xpt_add_periph(struct cam_periph *periph)
973 struct cam_ed *device;
976 TASK_INIT(&periph->periph_run_task, 0, xpt_run_allocq_task, periph);
977 device = periph->path->device;
978 status = CAM_REQ_CMP;
979 if (device != NULL) {
980 mtx_lock(&device->target->bus->eb_mtx);
981 device->generation++;
982 SLIST_INSERT_HEAD(&device->periphs, periph, periph_links);
983 mtx_unlock(&device->target->bus->eb_mtx);
990 xpt_remove_periph(struct cam_periph *periph)
992 struct cam_ed *device;
994 device = periph->path->device;
995 if (device != NULL) {
996 mtx_lock(&device->target->bus->eb_mtx);
997 device->generation++;
998 SLIST_REMOVE(&device->periphs, periph, cam_periph, periph_links);
999 mtx_unlock(&device->target->bus->eb_mtx);
1005 xpt_announce_periph(struct cam_periph *periph, char *announce_string)
1007 struct cam_path *path = periph->path;
1009 cam_periph_assert(periph, MA_OWNED);
1010 periph->flags |= CAM_PERIPH_ANNOUNCED;
1012 printf("%s%d at %s%d bus %d scbus%d target %d lun %jx\n",
1013 periph->periph_name, periph->unit_number,
1014 path->bus->sim->sim_name,
1015 path->bus->sim->unit_number,
1016 path->bus->sim->bus_id,
1018 path->target->target_id,
1019 (uintmax_t)path->device->lun_id);
1020 printf("%s%d: ", periph->periph_name, periph->unit_number);
1021 if (path->device->protocol == PROTO_SCSI)
1022 scsi_print_inquiry(&path->device->inq_data);
1023 else if (path->device->protocol == PROTO_ATA ||
1024 path->device->protocol == PROTO_SATAPM)
1025 ata_print_ident(&path->device->ident_data);
1026 else if (path->device->protocol == PROTO_SEMB)
1028 (struct sep_identify_data *)&path->device->ident_data);
1030 printf("Unknown protocol device\n");
1031 if (path->device->serial_num_len > 0) {
1032 /* Don't wrap the screen - print only the first 60 chars */
1033 printf("%s%d: Serial Number %.60s\n", periph->periph_name,
1034 periph->unit_number, path->device->serial_num);
1036 /* Announce transport details. */
1037 (*(path->bus->xport->announce))(periph);
1038 /* Announce command queueing. */
1039 if (path->device->inq_flags & SID_CmdQue
1040 || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) {
1041 printf("%s%d: Command Queueing enabled\n",
1042 periph->periph_name, periph->unit_number);
1044 /* Announce caller's details if they've passed in. */
1045 if (announce_string != NULL)
1046 printf("%s%d: %s\n", periph->periph_name,
1047 periph->unit_number, announce_string);
1051 xpt_announce_quirks(struct cam_periph *periph, int quirks, char *bit_string)
1054 printf("%s%d: quirks=0x%b\n", periph->periph_name,
1055 periph->unit_number, quirks, bit_string);
1060 xpt_denounce_periph(struct cam_periph *periph)
1062 struct cam_path *path = periph->path;
1064 cam_periph_assert(periph, MA_OWNED);
1065 printf("%s%d at %s%d bus %d scbus%d target %d lun %jx\n",
1066 periph->periph_name, periph->unit_number,
1067 path->bus->sim->sim_name,
1068 path->bus->sim->unit_number,
1069 path->bus->sim->bus_id,
1071 path->target->target_id,
1072 (uintmax_t)path->device->lun_id);
1073 printf("%s%d: ", periph->periph_name, periph->unit_number);
1074 if (path->device->protocol == PROTO_SCSI)
1075 scsi_print_inquiry_short(&path->device->inq_data);
1076 else if (path->device->protocol == PROTO_ATA ||
1077 path->device->protocol == PROTO_SATAPM)
1078 ata_print_ident_short(&path->device->ident_data);
1079 else if (path->device->protocol == PROTO_SEMB)
1080 semb_print_ident_short(
1081 (struct sep_identify_data *)&path->device->ident_data);
1083 printf("Unknown protocol device");
1084 if (path->device->serial_num_len > 0)
1085 printf(" s/n %.60s", path->device->serial_num);
1086 printf(" detached\n");
1091 xpt_getattr(char *buf, size_t len, const char *attr, struct cam_path *path)
1094 struct ccb_dev_advinfo cdai;
1095 struct scsi_vpd_id_descriptor *idd;
1097 xpt_path_assert(path, MA_OWNED);
1099 memset(&cdai, 0, sizeof(cdai));
1100 xpt_setup_ccb(&cdai.ccb_h, path, CAM_PRIORITY_NORMAL);
1101 cdai.ccb_h.func_code = XPT_DEV_ADVINFO;
1104 if (!strcmp(attr, "GEOM::ident"))
1105 cdai.buftype = CDAI_TYPE_SERIAL_NUM;
1106 else if (!strcmp(attr, "GEOM::physpath"))
1107 cdai.buftype = CDAI_TYPE_PHYS_PATH;
1108 else if (strcmp(attr, "GEOM::lunid") == 0 ||
1109 strcmp(attr, "GEOM::lunname") == 0) {
1110 cdai.buftype = CDAI_TYPE_SCSI_DEVID;
1111 cdai.bufsiz = CAM_SCSI_DEVID_MAXLEN;
1115 cdai.buf = malloc(cdai.bufsiz, M_CAMXPT, M_NOWAIT|M_ZERO);
1116 if (cdai.buf == NULL) {
1120 xpt_action((union ccb *)&cdai); /* can only be synchronous */
1121 if ((cdai.ccb_h.status & CAM_DEV_QFRZN) != 0)
1122 cam_release_devq(cdai.ccb_h.path, 0, 0, 0, FALSE);
1123 if (cdai.provsiz == 0)
1125 if (cdai.buftype == CDAI_TYPE_SCSI_DEVID) {
1126 if (strcmp(attr, "GEOM::lunid") == 0) {
1127 idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf,
1128 cdai.provsiz, scsi_devid_is_lun_naa);
1130 idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf,
1131 cdai.provsiz, scsi_devid_is_lun_eui64);
1135 idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf,
1136 cdai.provsiz, scsi_devid_is_lun_t10);
1138 idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf,
1139 cdai.provsiz, scsi_devid_is_lun_name);
1143 if ((idd->proto_codeset & SVPD_ID_CODESET_MASK) == SVPD_ID_CODESET_ASCII ||
1144 (idd->proto_codeset & SVPD_ID_CODESET_MASK) == SVPD_ID_CODESET_UTF8) {
1145 l = strnlen(idd->identifier, idd->length);
1147 bcopy(idd->identifier, buf, l);
1152 if (idd->length * 2 < len) {
1153 for (l = 0; l < idd->length; l++)
1154 sprintf(buf + l * 2, "%02x",
1155 idd->identifier[l]);
1161 if (strlcpy(buf, cdai.buf, len) >= len)
1166 if (cdai.buf != NULL)
1167 free(cdai.buf, M_CAMXPT);
1171 static dev_match_ret
1172 xptbusmatch(struct dev_match_pattern *patterns, u_int num_patterns,
1175 dev_match_ret retval;
1178 retval = DM_RET_NONE;
1181 * If we aren't given something to match against, that's an error.
1184 return(DM_RET_ERROR);
1187 * If there are no match entries, then this bus matches no
1190 if ((patterns == NULL) || (num_patterns == 0))
1191 return(DM_RET_DESCEND | DM_RET_COPY);
1193 for (i = 0; i < num_patterns; i++) {
1194 struct bus_match_pattern *cur_pattern;
1197 * If the pattern in question isn't for a bus node, we
1198 * aren't interested. However, we do indicate to the
1199 * calling routine that we should continue descending the
1200 * tree, since the user wants to match against lower-level
1203 if (patterns[i].type != DEV_MATCH_BUS) {
1204 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1205 retval |= DM_RET_DESCEND;
1209 cur_pattern = &patterns[i].pattern.bus_pattern;
1212 * If they want to match any bus node, we give them any
1215 if (cur_pattern->flags == BUS_MATCH_ANY) {
1216 /* set the copy flag */
1217 retval |= DM_RET_COPY;
1220 * If we've already decided on an action, go ahead
1223 if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE)
1228 * Not sure why someone would do this...
1230 if (cur_pattern->flags == BUS_MATCH_NONE)
1233 if (((cur_pattern->flags & BUS_MATCH_PATH) != 0)
1234 && (cur_pattern->path_id != bus->path_id))
1237 if (((cur_pattern->flags & BUS_MATCH_BUS_ID) != 0)
1238 && (cur_pattern->bus_id != bus->sim->bus_id))
1241 if (((cur_pattern->flags & BUS_MATCH_UNIT) != 0)
1242 && (cur_pattern->unit_number != bus->sim->unit_number))
1245 if (((cur_pattern->flags & BUS_MATCH_NAME) != 0)
1246 && (strncmp(cur_pattern->dev_name, bus->sim->sim_name,
1251 * If we get to this point, the user definitely wants
1252 * information on this bus. So tell the caller to copy the
1255 retval |= DM_RET_COPY;
1258 * If the return action has been set to descend, then we
1259 * know that we've already seen a non-bus matching
1260 * expression, therefore we need to further descend the tree.
1261 * This won't change by continuing around the loop, so we
1262 * go ahead and return. If we haven't seen a non-bus
1263 * matching expression, we keep going around the loop until
1264 * we exhaust the matching expressions. We'll set the stop
1265 * flag once we fall out of the loop.
1267 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND)
1272 * If the return action hasn't been set to descend yet, that means
1273 * we haven't seen anything other than bus matching patterns. So
1274 * tell the caller to stop descending the tree -- the user doesn't
1275 * want to match against lower level tree elements.
1277 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1278 retval |= DM_RET_STOP;
1283 static dev_match_ret
1284 xptdevicematch(struct dev_match_pattern *patterns, u_int num_patterns,
1285 struct cam_ed *device)
1287 dev_match_ret retval;
1290 retval = DM_RET_NONE;
1293 * If we aren't given something to match against, that's an error.
1296 return(DM_RET_ERROR);
1299 * If there are no match entries, then this device matches no
1302 if ((patterns == NULL) || (num_patterns == 0))
1303 return(DM_RET_DESCEND | DM_RET_COPY);
1305 for (i = 0; i < num_patterns; i++) {
1306 struct device_match_pattern *cur_pattern;
1307 struct scsi_vpd_device_id *device_id_page;
1310 * If the pattern in question isn't for a device node, we
1311 * aren't interested.
1313 if (patterns[i].type != DEV_MATCH_DEVICE) {
1314 if ((patterns[i].type == DEV_MATCH_PERIPH)
1315 && ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE))
1316 retval |= DM_RET_DESCEND;
1320 cur_pattern = &patterns[i].pattern.device_pattern;
1322 /* Error out if mutually exclusive options are specified. */
1323 if ((cur_pattern->flags & (DEV_MATCH_INQUIRY|DEV_MATCH_DEVID))
1324 == (DEV_MATCH_INQUIRY|DEV_MATCH_DEVID))
1325 return(DM_RET_ERROR);
1328 * If they want to match any device node, we give them any
1331 if (cur_pattern->flags == DEV_MATCH_ANY)
1335 * Not sure why someone would do this...
1337 if (cur_pattern->flags == DEV_MATCH_NONE)
1340 if (((cur_pattern->flags & DEV_MATCH_PATH) != 0)
1341 && (cur_pattern->path_id != device->target->bus->path_id))
1344 if (((cur_pattern->flags & DEV_MATCH_TARGET) != 0)
1345 && (cur_pattern->target_id != device->target->target_id))
1348 if (((cur_pattern->flags & DEV_MATCH_LUN) != 0)
1349 && (cur_pattern->target_lun != device->lun_id))
1352 if (((cur_pattern->flags & DEV_MATCH_INQUIRY) != 0)
1353 && (cam_quirkmatch((caddr_t)&device->inq_data,
1354 (caddr_t)&cur_pattern->data.inq_pat,
1355 1, sizeof(cur_pattern->data.inq_pat),
1356 scsi_static_inquiry_match) == NULL))
1359 device_id_page = (struct scsi_vpd_device_id *)device->device_id;
1360 if (((cur_pattern->flags & DEV_MATCH_DEVID) != 0)
1361 && (device->device_id_len < SVPD_DEVICE_ID_HDR_LEN
1362 || scsi_devid_match((uint8_t *)device_id_page->desc_list,
1363 device->device_id_len
1364 - SVPD_DEVICE_ID_HDR_LEN,
1365 cur_pattern->data.devid_pat.id,
1366 cur_pattern->data.devid_pat.id_len) != 0))
1371 * If we get to this point, the user definitely wants
1372 * information on this device. So tell the caller to copy
1375 retval |= DM_RET_COPY;
1378 * If the return action has been set to descend, then we
1379 * know that we've already seen a peripheral matching
1380 * expression, therefore we need to further descend the tree.
1381 * This won't change by continuing around the loop, so we
1382 * go ahead and return. If we haven't seen a peripheral
1383 * matching expression, we keep going around the loop until
1384 * we exhaust the matching expressions. We'll set the stop
1385 * flag once we fall out of the loop.
1387 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND)
1392 * If the return action hasn't been set to descend yet, that means
1393 * we haven't seen any peripheral matching patterns. So tell the
1394 * caller to stop descending the tree -- the user doesn't want to
1395 * match against lower level tree elements.
1397 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1398 retval |= DM_RET_STOP;
1404 * Match a single peripheral against any number of match patterns.
1406 static dev_match_ret
1407 xptperiphmatch(struct dev_match_pattern *patterns, u_int num_patterns,
1408 struct cam_periph *periph)
1410 dev_match_ret retval;
1414 * If we aren't given something to match against, that's an error.
1417 return(DM_RET_ERROR);
1420 * If there are no match entries, then this peripheral matches no
1423 if ((patterns == NULL) || (num_patterns == 0))
1424 return(DM_RET_STOP | DM_RET_COPY);
1427 * There aren't any nodes below a peripheral node, so there's no
1428 * reason to descend the tree any further.
1430 retval = DM_RET_STOP;
1432 for (i = 0; i < num_patterns; i++) {
1433 struct periph_match_pattern *cur_pattern;
1436 * If the pattern in question isn't for a peripheral, we
1437 * aren't interested.
1439 if (patterns[i].type != DEV_MATCH_PERIPH)
1442 cur_pattern = &patterns[i].pattern.periph_pattern;
1445 * If they want to match on anything, then we will do so.
1447 if (cur_pattern->flags == PERIPH_MATCH_ANY) {
1448 /* set the copy flag */
1449 retval |= DM_RET_COPY;
1452 * We've already set the return action to stop,
1453 * since there are no nodes below peripherals in
1460 * Not sure why someone would do this...
1462 if (cur_pattern->flags == PERIPH_MATCH_NONE)
1465 if (((cur_pattern->flags & PERIPH_MATCH_PATH) != 0)
1466 && (cur_pattern->path_id != periph->path->bus->path_id))
1470 * For the target and lun id's, we have to make sure the
1471 * target and lun pointers aren't NULL. The xpt peripheral
1472 * has a wildcard target and device.
1474 if (((cur_pattern->flags & PERIPH_MATCH_TARGET) != 0)
1475 && ((periph->path->target == NULL)
1476 ||(cur_pattern->target_id != periph->path->target->target_id)))
1479 if (((cur_pattern->flags & PERIPH_MATCH_LUN) != 0)
1480 && ((periph->path->device == NULL)
1481 || (cur_pattern->target_lun != periph->path->device->lun_id)))
1484 if (((cur_pattern->flags & PERIPH_MATCH_UNIT) != 0)
1485 && (cur_pattern->unit_number != periph->unit_number))
1488 if (((cur_pattern->flags & PERIPH_MATCH_NAME) != 0)
1489 && (strncmp(cur_pattern->periph_name, periph->periph_name,
1494 * If we get to this point, the user definitely wants
1495 * information on this peripheral. So tell the caller to
1496 * copy the data out.
1498 retval |= DM_RET_COPY;
1501 * The return action has already been set to stop, since
1502 * peripherals don't have any nodes below them in the EDT.
1508 * If we get to this point, the peripheral that was passed in
1509 * doesn't match any of the patterns.
1515 xptedtbusfunc(struct cam_eb *bus, void *arg)
1517 struct ccb_dev_match *cdm;
1518 struct cam_et *target;
1519 dev_match_ret retval;
1521 cdm = (struct ccb_dev_match *)arg;
1524 * If our position is for something deeper in the tree, that means
1525 * that we've already seen this node. So, we keep going down.
1527 if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1528 && (cdm->pos.cookie.bus == bus)
1529 && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1530 && (cdm->pos.cookie.target != NULL))
1531 retval = DM_RET_DESCEND;
1533 retval = xptbusmatch(cdm->patterns, cdm->num_patterns, bus);
1536 * If we got an error, bail out of the search.
1538 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1539 cdm->status = CAM_DEV_MATCH_ERROR;
1544 * If the copy flag is set, copy this bus out.
1546 if (retval & DM_RET_COPY) {
1549 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1550 sizeof(struct dev_match_result));
1553 * If we don't have enough space to put in another
1554 * match result, save our position and tell the
1555 * user there are more devices to check.
1557 if (spaceleft < sizeof(struct dev_match_result)) {
1558 bzero(&cdm->pos, sizeof(cdm->pos));
1559 cdm->pos.position_type =
1560 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS;
1562 cdm->pos.cookie.bus = bus;
1563 cdm->pos.generations[CAM_BUS_GENERATION]=
1564 xsoftc.bus_generation;
1565 cdm->status = CAM_DEV_MATCH_MORE;
1568 j = cdm->num_matches;
1570 cdm->matches[j].type = DEV_MATCH_BUS;
1571 cdm->matches[j].result.bus_result.path_id = bus->path_id;
1572 cdm->matches[j].result.bus_result.bus_id = bus->sim->bus_id;
1573 cdm->matches[j].result.bus_result.unit_number =
1574 bus->sim->unit_number;
1575 strncpy(cdm->matches[j].result.bus_result.dev_name,
1576 bus->sim->sim_name, DEV_IDLEN);
1580 * If the user is only interested in busses, there's no
1581 * reason to descend to the next level in the tree.
1583 if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP)
1587 * If there is a target generation recorded, check it to
1588 * make sure the target list hasn't changed.
1590 mtx_lock(&bus->eb_mtx);
1591 if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1592 && (cdm->pos.cookie.bus == bus)
1593 && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1594 && (cdm->pos.cookie.target != NULL)) {
1595 if ((cdm->pos.generations[CAM_TARGET_GENERATION] !=
1597 mtx_unlock(&bus->eb_mtx);
1598 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1601 target = (struct cam_et *)cdm->pos.cookie.target;
1605 mtx_unlock(&bus->eb_mtx);
1607 return (xpttargettraverse(bus, target, xptedttargetfunc, arg));
1611 xptedttargetfunc(struct cam_et *target, void *arg)
1613 struct ccb_dev_match *cdm;
1615 struct cam_ed *device;
1617 cdm = (struct ccb_dev_match *)arg;
1621 * If there is a device list generation recorded, check it to
1622 * make sure the device list hasn't changed.
1624 mtx_lock(&bus->eb_mtx);
1625 if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1626 && (cdm->pos.cookie.bus == bus)
1627 && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1628 && (cdm->pos.cookie.target == target)
1629 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1630 && (cdm->pos.cookie.device != NULL)) {
1631 if (cdm->pos.generations[CAM_DEV_GENERATION] !=
1632 target->generation) {
1633 mtx_unlock(&bus->eb_mtx);
1634 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1637 device = (struct cam_ed *)cdm->pos.cookie.device;
1641 mtx_unlock(&bus->eb_mtx);
1643 return (xptdevicetraverse(target, device, xptedtdevicefunc, arg));
1647 xptedtdevicefunc(struct cam_ed *device, void *arg)
1650 struct cam_periph *periph;
1651 struct ccb_dev_match *cdm;
1652 dev_match_ret retval;
1654 cdm = (struct ccb_dev_match *)arg;
1655 bus = device->target->bus;
1658 * If our position is for something deeper in the tree, that means
1659 * that we've already seen this node. So, we keep going down.
1661 if ((cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1662 && (cdm->pos.cookie.device == device)
1663 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
1664 && (cdm->pos.cookie.periph != NULL))
1665 retval = DM_RET_DESCEND;
1667 retval = xptdevicematch(cdm->patterns, cdm->num_patterns,
1670 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1671 cdm->status = CAM_DEV_MATCH_ERROR;
1676 * If the copy flag is set, copy this device out.
1678 if (retval & DM_RET_COPY) {
1681 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1682 sizeof(struct dev_match_result));
1685 * If we don't have enough space to put in another
1686 * match result, save our position and tell the
1687 * user there are more devices to check.
1689 if (spaceleft < sizeof(struct dev_match_result)) {
1690 bzero(&cdm->pos, sizeof(cdm->pos));
1691 cdm->pos.position_type =
1692 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS |
1693 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE;
1695 cdm->pos.cookie.bus = device->target->bus;
1696 cdm->pos.generations[CAM_BUS_GENERATION]=
1697 xsoftc.bus_generation;
1698 cdm->pos.cookie.target = device->target;
1699 cdm->pos.generations[CAM_TARGET_GENERATION] =
1700 device->target->bus->generation;
1701 cdm->pos.cookie.device = device;
1702 cdm->pos.generations[CAM_DEV_GENERATION] =
1703 device->target->generation;
1704 cdm->status = CAM_DEV_MATCH_MORE;
1707 j = cdm->num_matches;
1709 cdm->matches[j].type = DEV_MATCH_DEVICE;
1710 cdm->matches[j].result.device_result.path_id =
1711 device->target->bus->path_id;
1712 cdm->matches[j].result.device_result.target_id =
1713 device->target->target_id;
1714 cdm->matches[j].result.device_result.target_lun =
1716 cdm->matches[j].result.device_result.protocol =
1718 bcopy(&device->inq_data,
1719 &cdm->matches[j].result.device_result.inq_data,
1720 sizeof(struct scsi_inquiry_data));
1721 bcopy(&device->ident_data,
1722 &cdm->matches[j].result.device_result.ident_data,
1723 sizeof(struct ata_params));
1725 /* Let the user know whether this device is unconfigured */
1726 if (device->flags & CAM_DEV_UNCONFIGURED)
1727 cdm->matches[j].result.device_result.flags =
1728 DEV_RESULT_UNCONFIGURED;
1730 cdm->matches[j].result.device_result.flags =
1735 * If the user isn't interested in peripherals, don't descend
1736 * the tree any further.
1738 if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP)
1742 * If there is a peripheral list generation recorded, make sure
1743 * it hasn't changed.
1746 mtx_lock(&bus->eb_mtx);
1747 if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1748 && (cdm->pos.cookie.bus == bus)
1749 && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1750 && (cdm->pos.cookie.target == device->target)
1751 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1752 && (cdm->pos.cookie.device == device)
1753 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
1754 && (cdm->pos.cookie.periph != NULL)) {
1755 if (cdm->pos.generations[CAM_PERIPH_GENERATION] !=
1756 device->generation) {
1757 mtx_unlock(&bus->eb_mtx);
1759 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1762 periph = (struct cam_periph *)cdm->pos.cookie.periph;
1766 mtx_unlock(&bus->eb_mtx);
1769 return (xptperiphtraverse(device, periph, xptedtperiphfunc, arg));
1773 xptedtperiphfunc(struct cam_periph *periph, void *arg)
1775 struct ccb_dev_match *cdm;
1776 dev_match_ret retval;
1778 cdm = (struct ccb_dev_match *)arg;
1780 retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph);
1782 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1783 cdm->status = CAM_DEV_MATCH_ERROR;
1788 * If the copy flag is set, copy this peripheral out.
1790 if (retval & DM_RET_COPY) {
1793 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1794 sizeof(struct dev_match_result));
1797 * If we don't have enough space to put in another
1798 * match result, save our position and tell the
1799 * user there are more devices to check.
1801 if (spaceleft < sizeof(struct dev_match_result)) {
1802 bzero(&cdm->pos, sizeof(cdm->pos));
1803 cdm->pos.position_type =
1804 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS |
1805 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE |
1808 cdm->pos.cookie.bus = periph->path->bus;
1809 cdm->pos.generations[CAM_BUS_GENERATION]=
1810 xsoftc.bus_generation;
1811 cdm->pos.cookie.target = periph->path->target;
1812 cdm->pos.generations[CAM_TARGET_GENERATION] =
1813 periph->path->bus->generation;
1814 cdm->pos.cookie.device = periph->path->device;
1815 cdm->pos.generations[CAM_DEV_GENERATION] =
1816 periph->path->target->generation;
1817 cdm->pos.cookie.periph = periph;
1818 cdm->pos.generations[CAM_PERIPH_GENERATION] =
1819 periph->path->device->generation;
1820 cdm->status = CAM_DEV_MATCH_MORE;
1824 j = cdm->num_matches;
1826 cdm->matches[j].type = DEV_MATCH_PERIPH;
1827 cdm->matches[j].result.periph_result.path_id =
1828 periph->path->bus->path_id;
1829 cdm->matches[j].result.periph_result.target_id =
1830 periph->path->target->target_id;
1831 cdm->matches[j].result.periph_result.target_lun =
1832 periph->path->device->lun_id;
1833 cdm->matches[j].result.periph_result.unit_number =
1834 periph->unit_number;
1835 strncpy(cdm->matches[j].result.periph_result.periph_name,
1836 periph->periph_name, DEV_IDLEN);
1843 xptedtmatch(struct ccb_dev_match *cdm)
1848 cdm->num_matches = 0;
1851 * Check the bus list generation. If it has changed, the user
1852 * needs to reset everything and start over.
1855 if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1856 && (cdm->pos.cookie.bus != NULL)) {
1857 if (cdm->pos.generations[CAM_BUS_GENERATION] !=
1858 xsoftc.bus_generation) {
1860 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1863 bus = (struct cam_eb *)cdm->pos.cookie.bus;
1869 ret = xptbustraverse(bus, xptedtbusfunc, cdm);
1872 * If we get back 0, that means that we had to stop before fully
1873 * traversing the EDT. It also means that one of the subroutines
1874 * has set the status field to the proper value. If we get back 1,
1875 * we've fully traversed the EDT and copied out any matching entries.
1878 cdm->status = CAM_DEV_MATCH_LAST;
1884 xptplistpdrvfunc(struct periph_driver **pdrv, void *arg)
1886 struct cam_periph *periph;
1887 struct ccb_dev_match *cdm;
1889 cdm = (struct ccb_dev_match *)arg;
1892 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
1893 && (cdm->pos.cookie.pdrv == pdrv)
1894 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
1895 && (cdm->pos.cookie.periph != NULL)) {
1896 if (cdm->pos.generations[CAM_PERIPH_GENERATION] !=
1897 (*pdrv)->generation) {
1899 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1902 periph = (struct cam_periph *)cdm->pos.cookie.periph;
1908 return (xptpdperiphtraverse(pdrv, periph, xptplistperiphfunc, arg));
1912 xptplistperiphfunc(struct cam_periph *periph, void *arg)
1914 struct ccb_dev_match *cdm;
1915 dev_match_ret retval;
1917 cdm = (struct ccb_dev_match *)arg;
1919 retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph);
1921 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1922 cdm->status = CAM_DEV_MATCH_ERROR;
1927 * If the copy flag is set, copy this peripheral out.
1929 if (retval & DM_RET_COPY) {
1932 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1933 sizeof(struct dev_match_result));
1936 * If we don't have enough space to put in another
1937 * match result, save our position and tell the
1938 * user there are more devices to check.
1940 if (spaceleft < sizeof(struct dev_match_result)) {
1941 struct periph_driver **pdrv;
1944 bzero(&cdm->pos, sizeof(cdm->pos));
1945 cdm->pos.position_type =
1946 CAM_DEV_POS_PDRV | CAM_DEV_POS_PDPTR |
1950 * This may look a bit non-sensical, but it is
1951 * actually quite logical. There are very few
1952 * peripheral drivers, and bloating every peripheral
1953 * structure with a pointer back to its parent
1954 * peripheral driver linker set entry would cost
1955 * more in the long run than doing this quick lookup.
1957 for (pdrv = periph_drivers; *pdrv != NULL; pdrv++) {
1958 if (strcmp((*pdrv)->driver_name,
1959 periph->periph_name) == 0)
1963 if (*pdrv == NULL) {
1964 cdm->status = CAM_DEV_MATCH_ERROR;
1968 cdm->pos.cookie.pdrv = pdrv;
1970 * The periph generation slot does double duty, as
1971 * does the periph pointer slot. They are used for
1972 * both edt and pdrv lookups and positioning.
1974 cdm->pos.cookie.periph = periph;
1975 cdm->pos.generations[CAM_PERIPH_GENERATION] =
1976 (*pdrv)->generation;
1977 cdm->status = CAM_DEV_MATCH_MORE;
1981 j = cdm->num_matches;
1983 cdm->matches[j].type = DEV_MATCH_PERIPH;
1984 cdm->matches[j].result.periph_result.path_id =
1985 periph->path->bus->path_id;
1988 * The transport layer peripheral doesn't have a target or
1991 if (periph->path->target)
1992 cdm->matches[j].result.periph_result.target_id =
1993 periph->path->target->target_id;
1995 cdm->matches[j].result.periph_result.target_id =
1996 CAM_TARGET_WILDCARD;
1998 if (periph->path->device)
1999 cdm->matches[j].result.periph_result.target_lun =
2000 periph->path->device->lun_id;
2002 cdm->matches[j].result.periph_result.target_lun =
2005 cdm->matches[j].result.periph_result.unit_number =
2006 periph->unit_number;
2007 strncpy(cdm->matches[j].result.periph_result.periph_name,
2008 periph->periph_name, DEV_IDLEN);
2015 xptperiphlistmatch(struct ccb_dev_match *cdm)
2019 cdm->num_matches = 0;
2022 * At this point in the edt traversal function, we check the bus
2023 * list generation to make sure that no busses have been added or
2024 * removed since the user last sent a XPT_DEV_MATCH ccb through.
2025 * For the peripheral driver list traversal function, however, we
2026 * don't have to worry about new peripheral driver types coming or
2027 * going; they're in a linker set, and therefore can't change
2028 * without a recompile.
2031 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
2032 && (cdm->pos.cookie.pdrv != NULL))
2033 ret = xptpdrvtraverse(
2034 (struct periph_driver **)cdm->pos.cookie.pdrv,
2035 xptplistpdrvfunc, cdm);
2037 ret = xptpdrvtraverse(NULL, xptplistpdrvfunc, cdm);
2040 * If we get back 0, that means that we had to stop before fully
2041 * traversing the peripheral driver tree. It also means that one of
2042 * the subroutines has set the status field to the proper value. If
2043 * we get back 1, we've fully traversed the EDT and copied out any
2047 cdm->status = CAM_DEV_MATCH_LAST;
2053 xptbustraverse(struct cam_eb *start_bus, xpt_busfunc_t *tr_func, void *arg)
2055 struct cam_eb *bus, *next_bus;
2063 bus = TAILQ_FIRST(&xsoftc.xpt_busses);
2071 for (; bus != NULL; bus = next_bus) {
2072 retval = tr_func(bus, arg);
2074 xpt_release_bus(bus);
2078 next_bus = TAILQ_NEXT(bus, links);
2080 next_bus->refcount++;
2082 xpt_release_bus(bus);
2088 xpttargettraverse(struct cam_eb *bus, struct cam_et *start_target,
2089 xpt_targetfunc_t *tr_func, void *arg)
2091 struct cam_et *target, *next_target;
2096 target = start_target;
2098 mtx_lock(&bus->eb_mtx);
2099 target = TAILQ_FIRST(&bus->et_entries);
2100 if (target == NULL) {
2101 mtx_unlock(&bus->eb_mtx);
2105 mtx_unlock(&bus->eb_mtx);
2107 for (; target != NULL; target = next_target) {
2108 retval = tr_func(target, arg);
2110 xpt_release_target(target);
2113 mtx_lock(&bus->eb_mtx);
2114 next_target = TAILQ_NEXT(target, links);
2116 next_target->refcount++;
2117 mtx_unlock(&bus->eb_mtx);
2118 xpt_release_target(target);
2124 xptdevicetraverse(struct cam_et *target, struct cam_ed *start_device,
2125 xpt_devicefunc_t *tr_func, void *arg)
2128 struct cam_ed *device, *next_device;
2134 device = start_device;
2136 mtx_lock(&bus->eb_mtx);
2137 device = TAILQ_FIRST(&target->ed_entries);
2138 if (device == NULL) {
2139 mtx_unlock(&bus->eb_mtx);
2143 mtx_unlock(&bus->eb_mtx);
2145 for (; device != NULL; device = next_device) {
2146 mtx_lock(&device->device_mtx);
2147 retval = tr_func(device, arg);
2148 mtx_unlock(&device->device_mtx);
2150 xpt_release_device(device);
2153 mtx_lock(&bus->eb_mtx);
2154 next_device = TAILQ_NEXT(device, links);
2156 next_device->refcount++;
2157 mtx_unlock(&bus->eb_mtx);
2158 xpt_release_device(device);
2164 xptperiphtraverse(struct cam_ed *device, struct cam_periph *start_periph,
2165 xpt_periphfunc_t *tr_func, void *arg)
2168 struct cam_periph *periph, *next_periph;
2173 bus = device->target->bus;
2175 periph = start_periph;
2178 mtx_lock(&bus->eb_mtx);
2179 periph = SLIST_FIRST(&device->periphs);
2180 while (periph != NULL && (periph->flags & CAM_PERIPH_FREE) != 0)
2181 periph = SLIST_NEXT(periph, periph_links);
2182 if (periph == NULL) {
2183 mtx_unlock(&bus->eb_mtx);
2188 mtx_unlock(&bus->eb_mtx);
2191 for (; periph != NULL; periph = next_periph) {
2192 retval = tr_func(periph, arg);
2194 cam_periph_release_locked(periph);
2198 mtx_lock(&bus->eb_mtx);
2199 next_periph = SLIST_NEXT(periph, periph_links);
2200 while (next_periph != NULL &&
2201 (next_periph->flags & CAM_PERIPH_FREE) != 0)
2202 next_periph = SLIST_NEXT(next_periph, periph_links);
2204 next_periph->refcount++;
2205 mtx_unlock(&bus->eb_mtx);
2207 cam_periph_release_locked(periph);
2213 xptpdrvtraverse(struct periph_driver **start_pdrv,
2214 xpt_pdrvfunc_t *tr_func, void *arg)
2216 struct periph_driver **pdrv;
2222 * We don't traverse the peripheral driver list like we do the
2223 * other lists, because it is a linker set, and therefore cannot be
2224 * changed during runtime. If the peripheral driver list is ever
2225 * re-done to be something other than a linker set (i.e. it can
2226 * change while the system is running), the list traversal should
2227 * be modified to work like the other traversal functions.
2229 for (pdrv = (start_pdrv ? start_pdrv : periph_drivers);
2230 *pdrv != NULL; pdrv++) {
2231 retval = tr_func(pdrv, arg);
2241 xptpdperiphtraverse(struct periph_driver **pdrv,
2242 struct cam_periph *start_periph,
2243 xpt_periphfunc_t *tr_func, void *arg)
2245 struct cam_periph *periph, *next_periph;
2251 periph = start_periph;
2254 periph = TAILQ_FIRST(&(*pdrv)->units);
2255 while (periph != NULL && (periph->flags & CAM_PERIPH_FREE) != 0)
2256 periph = TAILQ_NEXT(periph, unit_links);
2257 if (periph == NULL) {
2264 for (; periph != NULL; periph = next_periph) {
2265 cam_periph_lock(periph);
2266 retval = tr_func(periph, arg);
2267 cam_periph_unlock(periph);
2269 cam_periph_release(periph);
2273 next_periph = TAILQ_NEXT(periph, unit_links);
2274 while (next_periph != NULL &&
2275 (next_periph->flags & CAM_PERIPH_FREE) != 0)
2276 next_periph = TAILQ_NEXT(next_periph, unit_links);
2278 next_periph->refcount++;
2280 cam_periph_release(periph);
2286 xptdefbusfunc(struct cam_eb *bus, void *arg)
2288 struct xpt_traverse_config *tr_config;
2290 tr_config = (struct xpt_traverse_config *)arg;
2292 if (tr_config->depth == XPT_DEPTH_BUS) {
2293 xpt_busfunc_t *tr_func;
2295 tr_func = (xpt_busfunc_t *)tr_config->tr_func;
2297 return(tr_func(bus, tr_config->tr_arg));
2299 return(xpttargettraverse(bus, NULL, xptdeftargetfunc, arg));
2303 xptdeftargetfunc(struct cam_et *target, void *arg)
2305 struct xpt_traverse_config *tr_config;
2307 tr_config = (struct xpt_traverse_config *)arg;
2309 if (tr_config->depth == XPT_DEPTH_TARGET) {
2310 xpt_targetfunc_t *tr_func;
2312 tr_func = (xpt_targetfunc_t *)tr_config->tr_func;
2314 return(tr_func(target, tr_config->tr_arg));
2316 return(xptdevicetraverse(target, NULL, xptdefdevicefunc, arg));
2320 xptdefdevicefunc(struct cam_ed *device, void *arg)
2322 struct xpt_traverse_config *tr_config;
2324 tr_config = (struct xpt_traverse_config *)arg;
2326 if (tr_config->depth == XPT_DEPTH_DEVICE) {
2327 xpt_devicefunc_t *tr_func;
2329 tr_func = (xpt_devicefunc_t *)tr_config->tr_func;
2331 return(tr_func(device, tr_config->tr_arg));
2333 return(xptperiphtraverse(device, NULL, xptdefperiphfunc, arg));
2337 xptdefperiphfunc(struct cam_periph *periph, void *arg)
2339 struct xpt_traverse_config *tr_config;
2340 xpt_periphfunc_t *tr_func;
2342 tr_config = (struct xpt_traverse_config *)arg;
2344 tr_func = (xpt_periphfunc_t *)tr_config->tr_func;
2347 * Unlike the other default functions, we don't check for depth
2348 * here. The peripheral driver level is the last level in the EDT,
2349 * so if we're here, we should execute the function in question.
2351 return(tr_func(periph, tr_config->tr_arg));
2355 * Execute the given function for every bus in the EDT.
2358 xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg)
2360 struct xpt_traverse_config tr_config;
2362 tr_config.depth = XPT_DEPTH_BUS;
2363 tr_config.tr_func = tr_func;
2364 tr_config.tr_arg = arg;
2366 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2370 * Execute the given function for every device in the EDT.
2373 xpt_for_all_devices(xpt_devicefunc_t *tr_func, void *arg)
2375 struct xpt_traverse_config tr_config;
2377 tr_config.depth = XPT_DEPTH_DEVICE;
2378 tr_config.tr_func = tr_func;
2379 tr_config.tr_arg = arg;
2381 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2385 xptsetasyncfunc(struct cam_ed *device, void *arg)
2387 struct cam_path path;
2388 struct ccb_getdev cgd;
2389 struct ccb_setasync *csa = (struct ccb_setasync *)arg;
2392 * Don't report unconfigured devices (Wildcard devs,
2393 * devices only for target mode, device instances
2394 * that have been invalidated but are waiting for
2395 * their last reference count to be released).
2397 if ((device->flags & CAM_DEV_UNCONFIGURED) != 0)
2400 xpt_compile_path(&path,
2402 device->target->bus->path_id,
2403 device->target->target_id,
2405 xpt_setup_ccb(&cgd.ccb_h, &path, CAM_PRIORITY_NORMAL);
2406 cgd.ccb_h.func_code = XPT_GDEV_TYPE;
2407 xpt_action((union ccb *)&cgd);
2408 csa->callback(csa->callback_arg,
2411 xpt_release_path(&path);
2417 xptsetasyncbusfunc(struct cam_eb *bus, void *arg)
2419 struct cam_path path;
2420 struct ccb_pathinq cpi;
2421 struct ccb_setasync *csa = (struct ccb_setasync *)arg;
2423 xpt_compile_path(&path, /*periph*/NULL,
2425 CAM_TARGET_WILDCARD,
2427 xpt_path_lock(&path);
2428 xpt_setup_ccb(&cpi.ccb_h, &path, CAM_PRIORITY_NORMAL);
2429 cpi.ccb_h.func_code = XPT_PATH_INQ;
2430 xpt_action((union ccb *)&cpi);
2431 csa->callback(csa->callback_arg,
2434 xpt_path_unlock(&path);
2435 xpt_release_path(&path);
2441 xpt_action(union ccb *start_ccb)
2444 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_action\n"));
2446 start_ccb->ccb_h.status = CAM_REQ_INPROG;
2447 (*(start_ccb->ccb_h.path->bus->xport->action))(start_ccb);
2451 xpt_action_default(union ccb *start_ccb)
2453 struct cam_path *path;
2454 struct cam_sim *sim;
2457 path = start_ccb->ccb_h.path;
2458 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_action_default\n"));
2460 switch (start_ccb->ccb_h.func_code) {
2463 struct cam_ed *device;
2466 * For the sake of compatibility with SCSI-1
2467 * devices that may not understand the identify
2468 * message, we include lun information in the
2469 * second byte of all commands. SCSI-1 specifies
2470 * that luns are a 3 bit value and reserves only 3
2471 * bits for lun information in the CDB. Later
2472 * revisions of the SCSI spec allow for more than 8
2473 * luns, but have deprecated lun information in the
2474 * CDB. So, if the lun won't fit, we must omit.
2476 * Also be aware that during initial probing for devices,
2477 * the inquiry information is unknown but initialized to 0.
2478 * This means that this code will be exercised while probing
2479 * devices with an ANSI revision greater than 2.
2481 device = path->device;
2482 if (device->protocol_version <= SCSI_REV_2
2483 && start_ccb->ccb_h.target_lun < 8
2484 && (start_ccb->ccb_h.flags & CAM_CDB_POINTER) == 0) {
2486 start_ccb->csio.cdb_io.cdb_bytes[1] |=
2487 start_ccb->ccb_h.target_lun << 5;
2489 start_ccb->csio.scsi_status = SCSI_STATUS_OK;
2493 case XPT_CONT_TARGET_IO:
2494 start_ccb->csio.sense_resid = 0;
2495 start_ccb->csio.resid = 0;
2498 if (start_ccb->ccb_h.func_code == XPT_ATA_IO)
2499 start_ccb->ataio.resid = 0;
2505 struct cam_devq *devq;
2507 devq = path->bus->sim->devq;
2508 mtx_lock(&devq->send_mtx);
2509 cam_ccbq_insert_ccb(&path->device->ccbq, start_ccb);
2510 if (xpt_schedule_devq(devq, path->device) != 0)
2512 mtx_unlock(&devq->send_mtx);
2515 case XPT_CALC_GEOMETRY:
2516 /* Filter out garbage */
2517 if (start_ccb->ccg.block_size == 0
2518 || start_ccb->ccg.volume_size == 0) {
2519 start_ccb->ccg.cylinders = 0;
2520 start_ccb->ccg.heads = 0;
2521 start_ccb->ccg.secs_per_track = 0;
2522 start_ccb->ccb_h.status = CAM_REQ_CMP;
2525 #if defined(PC98) || defined(__sparc64__)
2527 * In a PC-98 system, geometry translation depens on
2528 * the "real" device geometry obtained from mode page 4.
2529 * SCSI geometry translation is performed in the
2530 * initialization routine of the SCSI BIOS and the result
2531 * stored in host memory. If the translation is available
2532 * in host memory, use it. If not, rely on the default
2533 * translation the device driver performs.
2534 * For sparc64, we may need adjust the geometry of large
2535 * disks in order to fit the limitations of the 16-bit
2536 * fields of the VTOC8 disk label.
2538 if (scsi_da_bios_params(&start_ccb->ccg) != 0) {
2539 start_ccb->ccb_h.status = CAM_REQ_CMP;
2546 union ccb* abort_ccb;
2548 abort_ccb = start_ccb->cab.abort_ccb;
2549 if (XPT_FC_IS_DEV_QUEUED(abort_ccb)) {
2551 if (abort_ccb->ccb_h.pinfo.index >= 0) {
2552 struct cam_ccbq *ccbq;
2553 struct cam_ed *device;
2555 device = abort_ccb->ccb_h.path->device;
2556 ccbq = &device->ccbq;
2557 cam_ccbq_remove_ccb(ccbq, abort_ccb);
2558 abort_ccb->ccb_h.status =
2559 CAM_REQ_ABORTED|CAM_DEV_QFRZN;
2560 xpt_freeze_devq(abort_ccb->ccb_h.path, 1);
2561 xpt_done(abort_ccb);
2562 start_ccb->ccb_h.status = CAM_REQ_CMP;
2565 if (abort_ccb->ccb_h.pinfo.index == CAM_UNQUEUED_INDEX
2566 && (abort_ccb->ccb_h.status & CAM_SIM_QUEUED) == 0) {
2568 * We've caught this ccb en route to
2569 * the SIM. Flag it for abort and the
2570 * SIM will do so just before starting
2571 * real work on the CCB.
2573 abort_ccb->ccb_h.status =
2574 CAM_REQ_ABORTED|CAM_DEV_QFRZN;
2575 xpt_freeze_devq(abort_ccb->ccb_h.path, 1);
2576 start_ccb->ccb_h.status = CAM_REQ_CMP;
2580 if (XPT_FC_IS_QUEUED(abort_ccb)
2581 && (abort_ccb->ccb_h.pinfo.index == CAM_DONEQ_INDEX)) {
2583 * It's already completed but waiting
2584 * for our SWI to get to it.
2586 start_ccb->ccb_h.status = CAM_UA_ABORT;
2590 * If we weren't able to take care of the abort request
2591 * in the XPT, pass the request down to the SIM for processing.
2595 case XPT_ACCEPT_TARGET_IO:
2597 case XPT_IMMED_NOTIFY:
2598 case XPT_NOTIFY_ACK:
2600 case XPT_IMMEDIATE_NOTIFY:
2601 case XPT_NOTIFY_ACKNOWLEDGE:
2602 case XPT_GET_SIM_KNOB:
2603 case XPT_SET_SIM_KNOB:
2604 case XPT_GET_TRAN_SETTINGS:
2605 case XPT_SET_TRAN_SETTINGS:
2608 sim = path->bus->sim;
2609 lock = (mtx_owned(sim->mtx) == 0);
2612 (*(sim->sim_action))(sim, start_ccb);
2614 CAM_SIM_UNLOCK(sim);
2616 case XPT_PATH_STATS:
2617 start_ccb->cpis.last_reset = path->bus->last_reset;
2618 start_ccb->ccb_h.status = CAM_REQ_CMP;
2625 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) {
2626 start_ccb->ccb_h.status = CAM_DEV_NOT_THERE;
2628 struct ccb_getdev *cgd;
2630 cgd = &start_ccb->cgd;
2631 cgd->protocol = dev->protocol;
2632 cgd->inq_data = dev->inq_data;
2633 cgd->ident_data = dev->ident_data;
2634 cgd->inq_flags = dev->inq_flags;
2635 cgd->ccb_h.status = CAM_REQ_CMP;
2636 cgd->serial_num_len = dev->serial_num_len;
2637 if ((dev->serial_num_len > 0)
2638 && (dev->serial_num != NULL))
2639 bcopy(dev->serial_num, cgd->serial_num,
2640 dev->serial_num_len);
2644 case XPT_GDEV_STATS:
2649 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) {
2650 start_ccb->ccb_h.status = CAM_DEV_NOT_THERE;
2652 struct ccb_getdevstats *cgds;
2655 struct cam_devq *devq;
2657 cgds = &start_ccb->cgds;
2660 devq = bus->sim->devq;
2661 mtx_lock(&devq->send_mtx);
2662 cgds->dev_openings = dev->ccbq.dev_openings;
2663 cgds->dev_active = dev->ccbq.dev_active;
2664 cgds->allocated = dev->ccbq.allocated;
2665 cgds->queued = cam_ccbq_pending_ccb_count(&dev->ccbq);
2666 cgds->held = cgds->allocated - cgds->dev_active -
2668 cgds->last_reset = tar->last_reset;
2669 cgds->maxtags = dev->maxtags;
2670 cgds->mintags = dev->mintags;
2671 if (timevalcmp(&tar->last_reset, &bus->last_reset, <))
2672 cgds->last_reset = bus->last_reset;
2673 mtx_unlock(&devq->send_mtx);
2674 cgds->ccb_h.status = CAM_REQ_CMP;
2680 struct cam_periph *nperiph;
2681 struct periph_list *periph_head;
2682 struct ccb_getdevlist *cgdl;
2684 struct cam_ed *device;
2691 * Don't want anyone mucking with our data.
2693 device = path->device;
2694 periph_head = &device->periphs;
2695 cgdl = &start_ccb->cgdl;
2698 * Check and see if the list has changed since the user
2699 * last requested a list member. If so, tell them that the
2700 * list has changed, and therefore they need to start over
2701 * from the beginning.
2703 if ((cgdl->index != 0) &&
2704 (cgdl->generation != device->generation)) {
2705 cgdl->status = CAM_GDEVLIST_LIST_CHANGED;
2710 * Traverse the list of peripherals and attempt to find
2711 * the requested peripheral.
2713 for (nperiph = SLIST_FIRST(periph_head), i = 0;
2714 (nperiph != NULL) && (i <= cgdl->index);
2715 nperiph = SLIST_NEXT(nperiph, periph_links), i++) {
2716 if (i == cgdl->index) {
2717 strncpy(cgdl->periph_name,
2718 nperiph->periph_name,
2720 cgdl->unit_number = nperiph->unit_number;
2725 cgdl->status = CAM_GDEVLIST_ERROR;
2729 if (nperiph == NULL)
2730 cgdl->status = CAM_GDEVLIST_LAST_DEVICE;
2732 cgdl->status = CAM_GDEVLIST_MORE_DEVS;
2735 cgdl->generation = device->generation;
2737 cgdl->ccb_h.status = CAM_REQ_CMP;
2742 dev_pos_type position_type;
2743 struct ccb_dev_match *cdm;
2745 cdm = &start_ccb->cdm;
2748 * There are two ways of getting at information in the EDT.
2749 * The first way is via the primary EDT tree. It starts
2750 * with a list of busses, then a list of targets on a bus,
2751 * then devices/luns on a target, and then peripherals on a
2752 * device/lun. The "other" way is by the peripheral driver
2753 * lists. The peripheral driver lists are organized by
2754 * peripheral driver. (obviously) So it makes sense to
2755 * use the peripheral driver list if the user is looking
2756 * for something like "da1", or all "da" devices. If the
2757 * user is looking for something on a particular bus/target
2758 * or lun, it's generally better to go through the EDT tree.
2761 if (cdm->pos.position_type != CAM_DEV_POS_NONE)
2762 position_type = cdm->pos.position_type;
2766 position_type = CAM_DEV_POS_NONE;
2768 for (i = 0; i < cdm->num_patterns; i++) {
2769 if ((cdm->patterns[i].type == DEV_MATCH_BUS)
2770 ||(cdm->patterns[i].type == DEV_MATCH_DEVICE)){
2771 position_type = CAM_DEV_POS_EDT;
2776 if (cdm->num_patterns == 0)
2777 position_type = CAM_DEV_POS_EDT;
2778 else if (position_type == CAM_DEV_POS_NONE)
2779 position_type = CAM_DEV_POS_PDRV;
2782 switch(position_type & CAM_DEV_POS_TYPEMASK) {
2783 case CAM_DEV_POS_EDT:
2786 case CAM_DEV_POS_PDRV:
2787 xptperiphlistmatch(cdm);
2790 cdm->status = CAM_DEV_MATCH_ERROR;
2794 if (cdm->status == CAM_DEV_MATCH_ERROR)
2795 start_ccb->ccb_h.status = CAM_REQ_CMP_ERR;
2797 start_ccb->ccb_h.status = CAM_REQ_CMP;
2803 struct ccb_setasync *csa;
2804 struct async_node *cur_entry;
2805 struct async_list *async_head;
2808 csa = &start_ccb->csa;
2809 added = csa->event_enable;
2810 async_head = &path->device->asyncs;
2813 * If there is already an entry for us, simply
2816 cur_entry = SLIST_FIRST(async_head);
2817 while (cur_entry != NULL) {
2818 if ((cur_entry->callback_arg == csa->callback_arg)
2819 && (cur_entry->callback == csa->callback))
2821 cur_entry = SLIST_NEXT(cur_entry, links);
2824 if (cur_entry != NULL) {
2826 * If the request has no flags set,
2829 added &= ~cur_entry->event_enable;
2830 if (csa->event_enable == 0) {
2831 SLIST_REMOVE(async_head, cur_entry,
2833 xpt_release_device(path->device);
2834 free(cur_entry, M_CAMXPT);
2836 cur_entry->event_enable = csa->event_enable;
2838 csa->event_enable = added;
2840 cur_entry = malloc(sizeof(*cur_entry), M_CAMXPT,
2842 if (cur_entry == NULL) {
2843 csa->ccb_h.status = CAM_RESRC_UNAVAIL;
2846 cur_entry->event_enable = csa->event_enable;
2847 cur_entry->event_lock =
2848 mtx_owned(path->bus->sim->mtx) ? 1 : 0;
2849 cur_entry->callback_arg = csa->callback_arg;
2850 cur_entry->callback = csa->callback;
2851 SLIST_INSERT_HEAD(async_head, cur_entry, links);
2852 xpt_acquire_device(path->device);
2854 start_ccb->ccb_h.status = CAM_REQ_CMP;
2859 struct ccb_relsim *crs;
2862 crs = &start_ccb->crs;
2866 crs->ccb_h.status = CAM_DEV_NOT_THERE;
2870 if ((crs->release_flags & RELSIM_ADJUST_OPENINGS) != 0) {
2872 /* Don't ever go below one opening */
2873 if (crs->openings > 0) {
2874 xpt_dev_ccbq_resize(path, crs->openings);
2877 "number of openings is now %d\n",
2883 mtx_lock(&dev->sim->devq->send_mtx);
2884 if ((crs->release_flags & RELSIM_RELEASE_AFTER_TIMEOUT) != 0) {
2886 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) {
2889 * Just extend the old timeout and decrement
2890 * the freeze count so that a single timeout
2891 * is sufficient for releasing the queue.
2893 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
2894 callout_stop(&dev->callout);
2897 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
2900 callout_reset(&dev->callout,
2901 (crs->release_timeout * hz) / 1000,
2902 xpt_release_devq_timeout, dev);
2904 dev->flags |= CAM_DEV_REL_TIMEOUT_PENDING;
2908 if ((crs->release_flags & RELSIM_RELEASE_AFTER_CMDCMPLT) != 0) {
2910 if ((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0) {
2912 * Decrement the freeze count so that a single
2913 * completion is still sufficient to unfreeze
2916 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
2919 dev->flags |= CAM_DEV_REL_ON_COMPLETE;
2920 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
2924 if ((crs->release_flags & RELSIM_RELEASE_AFTER_QEMPTY) != 0) {
2926 if ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0
2927 || (dev->ccbq.dev_active == 0)) {
2929 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
2932 dev->flags |= CAM_DEV_REL_ON_QUEUE_EMPTY;
2933 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
2936 mtx_unlock(&dev->sim->devq->send_mtx);
2938 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) == 0)
2939 xpt_release_devq(path, /*count*/1, /*run_queue*/TRUE);
2940 start_ccb->crs.qfrozen_cnt = dev->ccbq.queue.qfrozen_cnt;
2941 start_ccb->ccb_h.status = CAM_REQ_CMP;
2945 struct cam_path *oldpath;
2947 /* Check that all request bits are supported. */
2948 if (start_ccb->cdbg.flags & ~(CAM_DEBUG_COMPILE)) {
2949 start_ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
2953 cam_dflags = CAM_DEBUG_NONE;
2954 if (cam_dpath != NULL) {
2955 oldpath = cam_dpath;
2957 xpt_free_path(oldpath);
2959 if (start_ccb->cdbg.flags != CAM_DEBUG_NONE) {
2960 if (xpt_create_path(&cam_dpath, NULL,
2961 start_ccb->ccb_h.path_id,
2962 start_ccb->ccb_h.target_id,
2963 start_ccb->ccb_h.target_lun) !=
2965 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
2967 cam_dflags = start_ccb->cdbg.flags;
2968 start_ccb->ccb_h.status = CAM_REQ_CMP;
2969 xpt_print(cam_dpath, "debugging flags now %x\n",
2973 start_ccb->ccb_h.status = CAM_REQ_CMP;
2977 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0)
2978 xpt_freeze_devq(path, 1);
2979 start_ccb->ccb_h.status = CAM_REQ_CMP;
2986 printf("%s: CCB type %#x not supported\n", __func__,
2987 start_ccb->ccb_h.func_code);
2988 start_ccb->ccb_h.status = CAM_PROVIDE_FAIL;
2989 if (start_ccb->ccb_h.func_code & XPT_FC_DEV_QUEUED) {
2990 xpt_done(start_ccb);
2997 xpt_polled_action(union ccb *start_ccb)
3000 struct cam_sim *sim;
3001 struct cam_devq *devq;
3004 timeout = start_ccb->ccb_h.timeout * 10;
3005 sim = start_ccb->ccb_h.path->bus->sim;
3007 dev = start_ccb->ccb_h.path->device;
3009 mtx_unlock(&dev->device_mtx);
3012 * Steal an opening so that no other queued requests
3013 * can get it before us while we simulate interrupts.
3015 mtx_lock(&devq->send_mtx);
3016 dev->ccbq.dev_openings--;
3017 while((devq->send_openings <= 0 || dev->ccbq.dev_openings < 0) &&
3019 mtx_unlock(&devq->send_mtx);
3022 (*(sim->sim_poll))(sim);
3023 CAM_SIM_UNLOCK(sim);
3025 mtx_lock(&devq->send_mtx);
3027 dev->ccbq.dev_openings++;
3028 mtx_unlock(&devq->send_mtx);
3031 xpt_action(start_ccb);
3032 while(--timeout > 0) {
3034 (*(sim->sim_poll))(sim);
3035 CAM_SIM_UNLOCK(sim);
3037 if ((start_ccb->ccb_h.status & CAM_STATUS_MASK)
3044 * XXX Is it worth adding a sim_timeout entry
3045 * point so we can attempt recovery? If
3046 * this is only used for dumps, I don't think
3049 start_ccb->ccb_h.status = CAM_CMD_TIMEOUT;
3052 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
3055 mtx_lock(&dev->device_mtx);
3059 * Schedule a peripheral driver to receive a ccb when it's
3060 * target device has space for more transactions.
3063 xpt_schedule(struct cam_periph *periph, u_int32_t new_priority)
3066 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("xpt_schedule\n"));
3067 cam_periph_assert(periph, MA_OWNED);
3068 if (new_priority < periph->scheduled_priority) {
3069 periph->scheduled_priority = new_priority;
3070 xpt_run_allocq(periph, 0);
3076 * Schedule a device to run on a given queue.
3077 * If the device was inserted as a new entry on the queue,
3078 * return 1 meaning the device queue should be run. If we
3079 * were already queued, implying someone else has already
3080 * started the queue, return 0 so the caller doesn't attempt
3084 xpt_schedule_dev(struct camq *queue, cam_pinfo *pinfo,
3085 u_int32_t new_priority)
3088 u_int32_t old_priority;
3090 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_schedule_dev\n"));
3092 old_priority = pinfo->priority;
3095 * Are we already queued?
3097 if (pinfo->index != CAM_UNQUEUED_INDEX) {
3098 /* Simply reorder based on new priority */
3099 if (new_priority < old_priority) {
3100 camq_change_priority(queue, pinfo->index,
3102 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3103 ("changed priority to %d\n",
3109 /* New entry on the queue */
3110 if (new_priority < old_priority)
3111 pinfo->priority = new_priority;
3113 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3114 ("Inserting onto queue\n"));
3115 pinfo->generation = ++queue->generation;
3116 camq_insert(queue, pinfo);
3123 xpt_run_allocq_task(void *context, int pending)
3125 struct cam_periph *periph = context;
3127 cam_periph_lock(periph);
3128 periph->flags &= ~CAM_PERIPH_RUN_TASK;
3129 xpt_run_allocq(periph, 1);
3130 cam_periph_unlock(periph);
3131 cam_periph_release(periph);
3135 xpt_run_allocq(struct cam_periph *periph, int sleep)
3137 struct cam_ed *device;
3141 cam_periph_assert(periph, MA_OWNED);
3142 if (periph->periph_allocating)
3144 periph->periph_allocating = 1;
3145 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_allocq(%p)\n", periph));
3146 device = periph->path->device;
3149 while ((prio = min(periph->scheduled_priority,
3150 periph->immediate_priority)) != CAM_PRIORITY_NONE &&
3151 (periph->periph_allocated - (ccb != NULL ? 1 : 0) <
3152 device->ccbq.total_openings || prio <= CAM_PRIORITY_OOB)) {
3155 (ccb = xpt_get_ccb_nowait(periph)) == NULL) {
3157 ccb = xpt_get_ccb(periph);
3160 if (periph->flags & CAM_PERIPH_RUN_TASK)
3162 cam_periph_doacquire(periph);
3163 periph->flags |= CAM_PERIPH_RUN_TASK;
3164 taskqueue_enqueue(xsoftc.xpt_taskq,
3165 &periph->periph_run_task);
3168 xpt_setup_ccb(&ccb->ccb_h, periph->path, prio);
3169 if (prio == periph->immediate_priority) {
3170 periph->immediate_priority = CAM_PRIORITY_NONE;
3171 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3172 ("waking cam_periph_getccb()\n"));
3173 SLIST_INSERT_HEAD(&periph->ccb_list, &ccb->ccb_h,
3175 wakeup(&periph->ccb_list);
3177 periph->scheduled_priority = CAM_PRIORITY_NONE;
3178 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3179 ("calling periph_start()\n"));
3180 periph->periph_start(periph, ccb);
3185 xpt_release_ccb(ccb);
3186 periph->periph_allocating = 0;
3190 xpt_run_devq(struct cam_devq *devq)
3192 char cdb_str[(SCSI_MAX_CDBLEN * 3) + 1];
3195 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_devq\n"));
3197 devq->send_queue.qfrozen_cnt++;
3198 while ((devq->send_queue.entries > 0)
3199 && (devq->send_openings > 0)
3200 && (devq->send_queue.qfrozen_cnt <= 1)) {
3201 struct cam_ed *device;
3202 union ccb *work_ccb;
3203 struct cam_sim *sim;
3205 device = (struct cam_ed *)camq_remove(&devq->send_queue,
3207 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3208 ("running device %p\n", device));
3210 work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD);
3211 if (work_ccb == NULL) {
3212 printf("device on run queue with no ccbs???\n");
3216 if ((work_ccb->ccb_h.flags & CAM_HIGH_POWER) != 0) {
3218 mtx_lock(&xsoftc.xpt_highpower_lock);
3219 if (xsoftc.num_highpower <= 0) {
3221 * We got a high power command, but we
3222 * don't have any available slots. Freeze
3223 * the device queue until we have a slot
3226 xpt_freeze_devq_device(device, 1);
3227 STAILQ_INSERT_TAIL(&xsoftc.highpowerq, device,
3230 mtx_unlock(&xsoftc.xpt_highpower_lock);
3234 * Consume a high power slot while
3237 xsoftc.num_highpower--;
3239 mtx_unlock(&xsoftc.xpt_highpower_lock);
3241 cam_ccbq_remove_ccb(&device->ccbq, work_ccb);
3242 cam_ccbq_send_ccb(&device->ccbq, work_ccb);
3243 devq->send_openings--;
3244 devq->send_active++;
3245 xpt_schedule_devq(devq, device);
3246 mtx_unlock(&devq->send_mtx);
3248 if ((work_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0) {
3250 * The client wants to freeze the queue
3251 * after this CCB is sent.
3253 xpt_freeze_devq(work_ccb->ccb_h.path, 1);
3256 /* In Target mode, the peripheral driver knows best... */
3257 if (work_ccb->ccb_h.func_code == XPT_SCSI_IO) {
3258 if ((device->inq_flags & SID_CmdQue) != 0
3259 && work_ccb->csio.tag_action != CAM_TAG_ACTION_NONE)
3260 work_ccb->ccb_h.flags |= CAM_TAG_ACTION_VALID;
3263 * Clear this in case of a retried CCB that
3264 * failed due to a rejected tag.
3266 work_ccb->ccb_h.flags &= ~CAM_TAG_ACTION_VALID;
3269 switch (work_ccb->ccb_h.func_code) {
3271 CAM_DEBUG(work_ccb->ccb_h.path,
3272 CAM_DEBUG_CDB,("%s. CDB: %s\n",
3273 scsi_op_desc(work_ccb->csio.cdb_io.cdb_bytes[0],
3275 scsi_cdb_string(work_ccb->csio.cdb_io.cdb_bytes,
3276 cdb_str, sizeof(cdb_str))));
3279 CAM_DEBUG(work_ccb->ccb_h.path,
3280 CAM_DEBUG_CDB,("%s. ACB: %s\n",
3281 ata_op_string(&work_ccb->ataio.cmd),
3282 ata_cmd_string(&work_ccb->ataio.cmd,
3283 cdb_str, sizeof(cdb_str))));
3290 * Device queues can be shared among multiple SIM instances
3291 * that reside on different busses. Use the SIM from the
3292 * queued device, rather than the one from the calling bus.
3295 lock = (mtx_owned(sim->mtx) == 0);
3298 (*(sim->sim_action))(sim, work_ccb);
3300 CAM_SIM_UNLOCK(sim);
3301 mtx_lock(&devq->send_mtx);
3303 devq->send_queue.qfrozen_cnt--;
3307 * This function merges stuff from the slave ccb into the master ccb, while
3308 * keeping important fields in the master ccb constant.
3311 xpt_merge_ccb(union ccb *master_ccb, union ccb *slave_ccb)
3315 * Pull fields that are valid for peripheral drivers to set
3316 * into the master CCB along with the CCB "payload".
3318 master_ccb->ccb_h.retry_count = slave_ccb->ccb_h.retry_count;
3319 master_ccb->ccb_h.func_code = slave_ccb->ccb_h.func_code;
3320 master_ccb->ccb_h.timeout = slave_ccb->ccb_h.timeout;
3321 master_ccb->ccb_h.flags = slave_ccb->ccb_h.flags;
3322 bcopy(&(&slave_ccb->ccb_h)[1], &(&master_ccb->ccb_h)[1],
3323 sizeof(union ccb) - sizeof(struct ccb_hdr));
3327 xpt_setup_ccb(struct ccb_hdr *ccb_h, struct cam_path *path, u_int32_t priority)
3330 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_setup_ccb\n"));
3331 ccb_h->pinfo.priority = priority;
3333 ccb_h->path_id = path->bus->path_id;
3335 ccb_h->target_id = path->target->target_id;
3337 ccb_h->target_id = CAM_TARGET_WILDCARD;
3339 ccb_h->target_lun = path->device->lun_id;
3340 ccb_h->pinfo.generation = ++path->device->ccbq.queue.generation;
3342 ccb_h->target_lun = CAM_TARGET_WILDCARD;
3344 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX;
3349 /* Path manipulation functions */
3351 xpt_create_path(struct cam_path **new_path_ptr, struct cam_periph *perph,
3352 path_id_t path_id, target_id_t target_id, lun_id_t lun_id)
3354 struct cam_path *path;
3357 path = (struct cam_path *)malloc(sizeof(*path), M_CAMPATH, M_NOWAIT);
3360 status = CAM_RESRC_UNAVAIL;
3363 status = xpt_compile_path(path, perph, path_id, target_id, lun_id);
3364 if (status != CAM_REQ_CMP) {
3365 free(path, M_CAMPATH);
3368 *new_path_ptr = path;
3373 xpt_create_path_unlocked(struct cam_path **new_path_ptr,
3374 struct cam_periph *periph, path_id_t path_id,
3375 target_id_t target_id, lun_id_t lun_id)
3378 return (xpt_create_path(new_path_ptr, periph, path_id, target_id,
3383 xpt_compile_path(struct cam_path *new_path, struct cam_periph *perph,
3384 path_id_t path_id, target_id_t target_id, lun_id_t lun_id)
3387 struct cam_et *target;
3388 struct cam_ed *device;
3391 status = CAM_REQ_CMP; /* Completed without error */
3392 target = NULL; /* Wildcarded */
3393 device = NULL; /* Wildcarded */
3396 * We will potentially modify the EDT, so block interrupts
3397 * that may attempt to create cam paths.
3399 bus = xpt_find_bus(path_id);
3401 status = CAM_PATH_INVALID;
3404 mtx_lock(&bus->eb_mtx);
3405 target = xpt_find_target(bus, target_id);
3406 if (target == NULL) {
3408 struct cam_et *new_target;
3410 new_target = xpt_alloc_target(bus, target_id);
3411 if (new_target == NULL) {
3412 status = CAM_RESRC_UNAVAIL;
3414 target = new_target;
3418 if (target != NULL) {
3419 device = xpt_find_device(target, lun_id);
3420 if (device == NULL) {
3422 struct cam_ed *new_device;
3425 (*(bus->xport->alloc_device))(bus,
3428 if (new_device == NULL) {
3429 status = CAM_RESRC_UNAVAIL;
3431 device = new_device;
3435 mtx_unlock(&bus->eb_mtx);
3439 * Only touch the user's data if we are successful.
3441 if (status == CAM_REQ_CMP) {
3442 new_path->periph = perph;
3443 new_path->bus = bus;
3444 new_path->target = target;
3445 new_path->device = device;
3446 CAM_DEBUG(new_path, CAM_DEBUG_TRACE, ("xpt_compile_path\n"));
3449 xpt_release_device(device);
3451 xpt_release_target(target);
3453 xpt_release_bus(bus);
3459 xpt_clone_path(struct cam_path **new_path_ptr, struct cam_path *path)
3461 struct cam_path *new_path;
3463 new_path = (struct cam_path *)malloc(sizeof(*path), M_CAMPATH, M_NOWAIT);
3464 if (new_path == NULL)
3465 return(CAM_RESRC_UNAVAIL);
3466 xpt_copy_path(new_path, path);
3467 *new_path_ptr = new_path;
3468 return (CAM_REQ_CMP);
3472 xpt_copy_path(struct cam_path *new_path, struct cam_path *path)
3476 if (path->bus != NULL)
3477 xpt_acquire_bus(path->bus);
3478 if (path->target != NULL)
3479 xpt_acquire_target(path->target);
3480 if (path->device != NULL)
3481 xpt_acquire_device(path->device);
3485 xpt_release_path(struct cam_path *path)
3487 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_path\n"));
3488 if (path->device != NULL) {
3489 xpt_release_device(path->device);
3490 path->device = NULL;
3492 if (path->target != NULL) {
3493 xpt_release_target(path->target);
3494 path->target = NULL;
3496 if (path->bus != NULL) {
3497 xpt_release_bus(path->bus);
3503 xpt_free_path(struct cam_path *path)
3506 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_free_path\n"));
3507 xpt_release_path(path);
3508 free(path, M_CAMPATH);
3512 xpt_path_counts(struct cam_path *path, uint32_t *bus_ref,
3513 uint32_t *periph_ref, uint32_t *target_ref, uint32_t *device_ref)
3519 *bus_ref = path->bus->refcount;
3525 *periph_ref = path->periph->refcount;
3532 *target_ref = path->target->refcount;
3538 *device_ref = path->device->refcount;
3545 * Return -1 for failure, 0 for exact match, 1 for match with wildcards
3546 * in path1, 2 for match with wildcards in path2.
3549 xpt_path_comp(struct cam_path *path1, struct cam_path *path2)
3553 if (path1->bus != path2->bus) {
3554 if (path1->bus->path_id == CAM_BUS_WILDCARD)
3556 else if (path2->bus->path_id == CAM_BUS_WILDCARD)
3561 if (path1->target != path2->target) {
3562 if (path1->target->target_id == CAM_TARGET_WILDCARD) {
3565 } else if (path2->target->target_id == CAM_TARGET_WILDCARD)
3570 if (path1->device != path2->device) {
3571 if (path1->device->lun_id == CAM_LUN_WILDCARD) {
3574 } else if (path2->device->lun_id == CAM_LUN_WILDCARD)
3583 xpt_path_comp_dev(struct cam_path *path, struct cam_ed *dev)
3587 if (path->bus != dev->target->bus) {
3588 if (path->bus->path_id == CAM_BUS_WILDCARD)
3590 else if (dev->target->bus->path_id == CAM_BUS_WILDCARD)
3595 if (path->target != dev->target) {
3596 if (path->target->target_id == CAM_TARGET_WILDCARD) {
3599 } else if (dev->target->target_id == CAM_TARGET_WILDCARD)
3604 if (path->device != dev) {
3605 if (path->device->lun_id == CAM_LUN_WILDCARD) {
3608 } else if (dev->lun_id == CAM_LUN_WILDCARD)
3617 xpt_print_path(struct cam_path *path)
3621 printf("(nopath): ");
3623 if (path->periph != NULL)
3624 printf("(%s%d:", path->periph->periph_name,
3625 path->periph->unit_number);
3627 printf("(noperiph:");
3629 if (path->bus != NULL)
3630 printf("%s%d:%d:", path->bus->sim->sim_name,
3631 path->bus->sim->unit_number,
3632 path->bus->sim->bus_id);
3636 if (path->target != NULL)
3637 printf("%d:", path->target->target_id);
3641 if (path->device != NULL)
3642 printf("%jx): ", (uintmax_t)path->device->lun_id);
3649 xpt_print_device(struct cam_ed *device)
3653 printf("(nopath): ");
3655 printf("(noperiph:%s%d:%d:%d:%jx): ", device->sim->sim_name,
3656 device->sim->unit_number,
3657 device->sim->bus_id,
3658 device->target->target_id,
3659 (uintmax_t)device->lun_id);
3664 xpt_print(struct cam_path *path, const char *fmt, ...)
3667 xpt_print_path(path);
3674 xpt_path_string(struct cam_path *path, char *str, size_t str_len)
3678 sbuf_new(&sb, str, str_len, 0);
3681 sbuf_printf(&sb, "(nopath): ");
3683 if (path->periph != NULL)
3684 sbuf_printf(&sb, "(%s%d:", path->periph->periph_name,
3685 path->periph->unit_number);
3687 sbuf_printf(&sb, "(noperiph:");
3689 if (path->bus != NULL)
3690 sbuf_printf(&sb, "%s%d:%d:", path->bus->sim->sim_name,
3691 path->bus->sim->unit_number,
3692 path->bus->sim->bus_id);
3694 sbuf_printf(&sb, "nobus:");
3696 if (path->target != NULL)
3697 sbuf_printf(&sb, "%d:", path->target->target_id);
3699 sbuf_printf(&sb, "X:");
3701 if (path->device != NULL)
3702 sbuf_printf(&sb, "%jx): ",
3703 (uintmax_t)path->device->lun_id);
3705 sbuf_printf(&sb, "X): ");
3709 return(sbuf_len(&sb));
3713 xpt_path_path_id(struct cam_path *path)
3715 return(path->bus->path_id);
3719 xpt_path_target_id(struct cam_path *path)
3721 if (path->target != NULL)
3722 return (path->target->target_id);
3724 return (CAM_TARGET_WILDCARD);
3728 xpt_path_lun_id(struct cam_path *path)
3730 if (path->device != NULL)
3731 return (path->device->lun_id);
3733 return (CAM_LUN_WILDCARD);
3737 xpt_path_sim(struct cam_path *path)
3740 return (path->bus->sim);
3744 xpt_path_periph(struct cam_path *path)
3747 return (path->periph);
3751 xpt_path_legacy_ata_id(struct cam_path *path)
3756 if ((strcmp(path->bus->sim->sim_name, "ata") != 0) &&
3757 strcmp(path->bus->sim->sim_name, "ahcich") != 0 &&
3758 strcmp(path->bus->sim->sim_name, "mvsch") != 0 &&
3759 strcmp(path->bus->sim->sim_name, "siisch") != 0)
3762 if (strcmp(path->bus->sim->sim_name, "ata") == 0 &&
3763 path->bus->sim->unit_number < 2) {
3764 bus_id = path->bus->sim->unit_number;
3768 TAILQ_FOREACH(bus, &xsoftc.xpt_busses, links) {
3769 if (bus == path->bus)
3771 if ((strcmp(bus->sim->sim_name, "ata") == 0 &&
3772 bus->sim->unit_number >= 2) ||
3773 strcmp(bus->sim->sim_name, "ahcich") == 0 ||
3774 strcmp(bus->sim->sim_name, "mvsch") == 0 ||
3775 strcmp(bus->sim->sim_name, "siisch") == 0)
3780 if (path->target != NULL) {
3781 if (path->target->target_id < 2)
3782 return (bus_id * 2 + path->target->target_id);
3786 return (bus_id * 2);
3790 * Release a CAM control block for the caller. Remit the cost of the structure
3791 * to the device referenced by the path. If the this device had no 'credits'
3792 * and peripheral drivers have registered async callbacks for this notification
3796 xpt_release_ccb(union ccb *free_ccb)
3798 struct cam_ed *device;
3799 struct cam_periph *periph;
3801 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_release_ccb\n"));
3802 xpt_path_assert(free_ccb->ccb_h.path, MA_OWNED);
3803 device = free_ccb->ccb_h.path->device;
3804 periph = free_ccb->ccb_h.path->periph;
3806 xpt_free_ccb(free_ccb);
3807 periph->periph_allocated--;
3808 cam_ccbq_release_opening(&device->ccbq);
3809 xpt_run_allocq(periph, 0);
3812 /* Functions accessed by SIM drivers */
3814 static struct xpt_xport xport_default = {
3815 .alloc_device = xpt_alloc_device_default,
3816 .action = xpt_action_default,
3817 .async = xpt_dev_async_default,
3821 * A sim structure, listing the SIM entry points and instance
3822 * identification info is passed to xpt_bus_register to hook the SIM
3823 * into the CAM framework. xpt_bus_register creates a cam_eb entry
3824 * for this new bus and places it in the array of busses and assigns
3825 * it a path_id. The path_id may be influenced by "hard wiring"
3826 * information specified by the user. Once interrupt services are
3827 * available, the bus will be probed.
3830 xpt_bus_register(struct cam_sim *sim, device_t parent, u_int32_t bus)
3832 struct cam_eb *new_bus;
3833 struct cam_eb *old_bus;
3834 struct ccb_pathinq cpi;
3835 struct cam_path *path;
3838 mtx_assert(sim->mtx, MA_OWNED);
3841 new_bus = (struct cam_eb *)malloc(sizeof(*new_bus),
3842 M_CAMXPT, M_NOWAIT|M_ZERO);
3843 if (new_bus == NULL) {
3844 /* Couldn't satisfy request */
3845 return (CAM_RESRC_UNAVAIL);
3848 mtx_init(&new_bus->eb_mtx, "CAM bus lock", NULL, MTX_DEF);
3849 TAILQ_INIT(&new_bus->et_entries);
3852 timevalclear(&new_bus->last_reset);
3854 new_bus->refcount = 1; /* Held until a bus_deregister event */
3855 new_bus->generation = 0;
3858 sim->path_id = new_bus->path_id =
3859 xptpathid(sim->sim_name, sim->unit_number, sim->bus_id);
3860 old_bus = TAILQ_FIRST(&xsoftc.xpt_busses);
3861 while (old_bus != NULL
3862 && old_bus->path_id < new_bus->path_id)
3863 old_bus = TAILQ_NEXT(old_bus, links);
3864 if (old_bus != NULL)
3865 TAILQ_INSERT_BEFORE(old_bus, new_bus, links);
3867 TAILQ_INSERT_TAIL(&xsoftc.xpt_busses, new_bus, links);
3868 xsoftc.bus_generation++;
3872 * Set a default transport so that a PATH_INQ can be issued to
3873 * the SIM. This will then allow for probing and attaching of
3874 * a more appropriate transport.
3876 new_bus->xport = &xport_default;
3878 status = xpt_create_path(&path, /*periph*/NULL, sim->path_id,
3879 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
3880 if (status != CAM_REQ_CMP) {
3881 xpt_release_bus(new_bus);
3882 free(path, M_CAMXPT);
3883 return (CAM_RESRC_UNAVAIL);
3886 xpt_setup_ccb(&cpi.ccb_h, path, CAM_PRIORITY_NORMAL);
3887 cpi.ccb_h.func_code = XPT_PATH_INQ;
3888 xpt_action((union ccb *)&cpi);
3890 if (cpi.ccb_h.status == CAM_REQ_CMP) {
3891 switch (cpi.transport) {
3899 new_bus->xport = scsi_get_xport();
3903 new_bus->xport = ata_get_xport();
3906 new_bus->xport = &xport_default;
3911 /* Notify interested parties */
3912 if (sim->path_id != CAM_XPT_PATH_ID) {
3914 xpt_async(AC_PATH_REGISTERED, path, &cpi);
3915 if ((cpi.hba_misc & PIM_NOSCAN) == 0) {
3916 union ccb *scan_ccb;
3918 /* Initiate bus rescan. */
3919 scan_ccb = xpt_alloc_ccb_nowait();
3920 if (scan_ccb != NULL) {
3921 scan_ccb->ccb_h.path = path;
3922 scan_ccb->ccb_h.func_code = XPT_SCAN_BUS;
3923 scan_ccb->crcn.flags = 0;
3924 xpt_rescan(scan_ccb);
3927 "Can't allocate CCB to scan bus\n");
3928 xpt_free_path(path);
3931 xpt_free_path(path);
3933 xpt_free_path(path);
3934 return (CAM_SUCCESS);
3938 xpt_bus_deregister(path_id_t pathid)
3940 struct cam_path bus_path;
3943 status = xpt_compile_path(&bus_path, NULL, pathid,
3944 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
3945 if (status != CAM_REQ_CMP)
3948 xpt_async(AC_LOST_DEVICE, &bus_path, NULL);
3949 xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL);
3951 /* Release the reference count held while registered. */
3952 xpt_release_bus(bus_path.bus);
3953 xpt_release_path(&bus_path);
3955 return (CAM_REQ_CMP);
3959 xptnextfreepathid(void)
3965 mtx_assert(&xsoftc.xpt_topo_lock, MA_OWNED);
3967 bus = TAILQ_FIRST(&xsoftc.xpt_busses);
3969 /* Find an unoccupied pathid */
3970 while (bus != NULL && bus->path_id <= pathid) {
3971 if (bus->path_id == pathid)
3973 bus = TAILQ_NEXT(bus, links);
3977 * Ensure that this pathid is not reserved for
3978 * a bus that may be registered in the future.
3980 if (resource_string_value("scbus", pathid, "at", &strval) == 0) {
3982 /* Start the search over */
3989 xptpathid(const char *sim_name, int sim_unit, int sim_bus)
3996 pathid = CAM_XPT_PATH_ID;
3997 snprintf(buf, sizeof(buf), "%s%d", sim_name, sim_unit);
3998 if (strcmp(buf, "xpt0") == 0 && sim_bus == 0)
4001 while ((resource_find_match(&i, &dname, &dunit, "at", buf)) == 0) {
4002 if (strcmp(dname, "scbus")) {
4003 /* Avoid a bit of foot shooting. */
4006 if (dunit < 0) /* unwired?! */
4008 if (resource_int_value("scbus", dunit, "bus", &val) == 0) {
4009 if (sim_bus == val) {
4013 } else if (sim_bus == 0) {
4014 /* Unspecified matches bus 0 */
4018 printf("Ambiguous scbus configuration for %s%d "
4019 "bus %d, cannot wire down. The kernel "
4020 "config entry for scbus%d should "
4021 "specify a controller bus.\n"
4022 "Scbus will be assigned dynamically.\n",
4023 sim_name, sim_unit, sim_bus, dunit);
4028 if (pathid == CAM_XPT_PATH_ID)
4029 pathid = xptnextfreepathid();
4034 xpt_async_string(u_int32_t async_code)
4037 switch (async_code) {
4038 case AC_BUS_RESET: return ("AC_BUS_RESET");
4039 case AC_UNSOL_RESEL: return ("AC_UNSOL_RESEL");
4040 case AC_SCSI_AEN: return ("AC_SCSI_AEN");
4041 case AC_SENT_BDR: return ("AC_SENT_BDR");
4042 case AC_PATH_REGISTERED: return ("AC_PATH_REGISTERED");
4043 case AC_PATH_DEREGISTERED: return ("AC_PATH_DEREGISTERED");
4044 case AC_FOUND_DEVICE: return ("AC_FOUND_DEVICE");
4045 case AC_LOST_DEVICE: return ("AC_LOST_DEVICE");
4046 case AC_TRANSFER_NEG: return ("AC_TRANSFER_NEG");
4047 case AC_INQ_CHANGED: return ("AC_INQ_CHANGED");
4048 case AC_GETDEV_CHANGED: return ("AC_GETDEV_CHANGED");
4049 case AC_CONTRACT: return ("AC_CONTRACT");
4050 case AC_ADVINFO_CHANGED: return ("AC_ADVINFO_CHANGED");
4051 case AC_UNIT_ATTENTION: return ("AC_UNIT_ATTENTION");
4053 return ("AC_UNKNOWN");
4057 xpt_async_size(u_int32_t async_code)
4060 switch (async_code) {
4061 case AC_BUS_RESET: return (0);
4062 case AC_UNSOL_RESEL: return (0);
4063 case AC_SCSI_AEN: return (0);
4064 case AC_SENT_BDR: return (0);
4065 case AC_PATH_REGISTERED: return (sizeof(struct ccb_pathinq));
4066 case AC_PATH_DEREGISTERED: return (0);
4067 case AC_FOUND_DEVICE: return (sizeof(struct ccb_getdev));
4068 case AC_LOST_DEVICE: return (0);
4069 case AC_TRANSFER_NEG: return (sizeof(struct ccb_trans_settings));
4070 case AC_INQ_CHANGED: return (0);
4071 case AC_GETDEV_CHANGED: return (0);
4072 case AC_CONTRACT: return (sizeof(struct ac_contract));
4073 case AC_ADVINFO_CHANGED: return (-1);
4074 case AC_UNIT_ATTENTION: return (sizeof(struct ccb_scsiio));
4080 xpt_async_process_dev(struct cam_ed *device, void *arg)
4082 union ccb *ccb = arg;
4083 struct cam_path *path = ccb->ccb_h.path;
4084 void *async_arg = ccb->casync.async_arg_ptr;
4085 u_int32_t async_code = ccb->casync.async_code;
4088 if (path->device != device
4089 && path->device->lun_id != CAM_LUN_WILDCARD
4090 && device->lun_id != CAM_LUN_WILDCARD)
4094 * The async callback could free the device.
4095 * If it is a broadcast async, it doesn't hold
4096 * device reference, so take our own reference.
4098 xpt_acquire_device(device);
4101 * If async for specific device is to be delivered to
4102 * the wildcard client, take the specific device lock.
4103 * XXX: We may need a way for client to specify it.
4105 if ((device->lun_id == CAM_LUN_WILDCARD &&
4106 path->device->lun_id != CAM_LUN_WILDCARD) ||
4107 (device->target->target_id == CAM_TARGET_WILDCARD &&
4108 path->target->target_id != CAM_TARGET_WILDCARD) ||
4109 (device->target->bus->path_id == CAM_BUS_WILDCARD &&
4110 path->target->bus->path_id != CAM_BUS_WILDCARD)) {
4111 mtx_unlock(&device->device_mtx);
4112 xpt_path_lock(path);
4117 (*(device->target->bus->xport->async))(async_code,
4118 device->target->bus, device->target, device, async_arg);
4119 xpt_async_bcast(&device->asyncs, async_code, path, async_arg);
4122 xpt_path_unlock(path);
4123 mtx_lock(&device->device_mtx);
4125 xpt_release_device(device);
4130 xpt_async_process_tgt(struct cam_et *target, void *arg)
4132 union ccb *ccb = arg;
4133 struct cam_path *path = ccb->ccb_h.path;
4135 if (path->target != target
4136 && path->target->target_id != CAM_TARGET_WILDCARD
4137 && target->target_id != CAM_TARGET_WILDCARD)
4140 if (ccb->casync.async_code == AC_SENT_BDR) {
4141 /* Update our notion of when the last reset occurred */
4142 microtime(&target->last_reset);
4145 return (xptdevicetraverse(target, NULL, xpt_async_process_dev, ccb));
4149 xpt_async_process(struct cam_periph *periph, union ccb *ccb)
4152 struct cam_path *path;
4154 u_int32_t async_code;
4156 path = ccb->ccb_h.path;
4157 async_code = ccb->casync.async_code;
4158 async_arg = ccb->casync.async_arg_ptr;
4159 CAM_DEBUG(path, CAM_DEBUG_TRACE | CAM_DEBUG_INFO,
4160 ("xpt_async(%s)\n", xpt_async_string(async_code)));
4163 if (async_code == AC_BUS_RESET) {
4164 /* Update our notion of when the last reset occurred */
4165 microtime(&bus->last_reset);
4168 xpttargettraverse(bus, NULL, xpt_async_process_tgt, ccb);
4171 * If this wasn't a fully wildcarded async, tell all
4172 * clients that want all async events.
4174 if (bus != xpt_periph->path->bus) {
4175 xpt_path_lock(xpt_periph->path);
4176 xpt_async_process_dev(xpt_periph->path->device, ccb);
4177 xpt_path_unlock(xpt_periph->path);
4180 if (path->device != NULL && path->device->lun_id != CAM_LUN_WILDCARD)
4181 xpt_release_devq(path, 1, TRUE);
4183 xpt_release_simq(path->bus->sim, TRUE);
4184 if (ccb->casync.async_arg_size > 0)
4185 free(async_arg, M_CAMXPT);
4186 xpt_free_path(path);
4191 xpt_async_bcast(struct async_list *async_head,
4192 u_int32_t async_code,
4193 struct cam_path *path, void *async_arg)
4195 struct async_node *cur_entry;
4198 cur_entry = SLIST_FIRST(async_head);
4199 while (cur_entry != NULL) {
4200 struct async_node *next_entry;
4202 * Grab the next list entry before we call the current
4203 * entry's callback. This is because the callback function
4204 * can delete its async callback entry.
4206 next_entry = SLIST_NEXT(cur_entry, links);
4207 if ((cur_entry->event_enable & async_code) != 0) {
4208 lock = cur_entry->event_lock;
4210 CAM_SIM_LOCK(path->device->sim);
4211 cur_entry->callback(cur_entry->callback_arg,
4215 CAM_SIM_UNLOCK(path->device->sim);
4217 cur_entry = next_entry;
4222 xpt_async(u_int32_t async_code, struct cam_path *path, void *async_arg)
4227 ccb = xpt_alloc_ccb_nowait();
4229 xpt_print(path, "Can't allocate CCB to send %s\n",
4230 xpt_async_string(async_code));
4234 if (xpt_clone_path(&ccb->ccb_h.path, path) != CAM_REQ_CMP) {
4235 xpt_print(path, "Can't allocate path to send %s\n",
4236 xpt_async_string(async_code));
4240 ccb->ccb_h.path->periph = NULL;
4241 ccb->ccb_h.func_code = XPT_ASYNC;
4242 ccb->ccb_h.cbfcnp = xpt_async_process;
4243 ccb->ccb_h.flags |= CAM_UNLOCKED;
4244 ccb->casync.async_code = async_code;
4245 ccb->casync.async_arg_size = 0;
4246 size = xpt_async_size(async_code);
4247 if (size > 0 && async_arg != NULL) {
4248 ccb->casync.async_arg_ptr = malloc(size, M_CAMXPT, M_NOWAIT);
4249 if (ccb->casync.async_arg_ptr == NULL) {
4250 xpt_print(path, "Can't allocate argument to send %s\n",
4251 xpt_async_string(async_code));
4252 xpt_free_path(ccb->ccb_h.path);
4256 memcpy(ccb->casync.async_arg_ptr, async_arg, size);
4257 ccb->casync.async_arg_size = size;
4258 } else if (size < 0)
4259 ccb->casync.async_arg_size = size;
4260 if (path->device != NULL && path->device->lun_id != CAM_LUN_WILDCARD)
4261 xpt_freeze_devq(path, 1);
4263 xpt_freeze_simq(path->bus->sim, 1);
4268 xpt_dev_async_default(u_int32_t async_code, struct cam_eb *bus,
4269 struct cam_et *target, struct cam_ed *device,
4274 * We only need to handle events for real devices.
4276 if (target->target_id == CAM_TARGET_WILDCARD
4277 || device->lun_id == CAM_LUN_WILDCARD)
4280 printf("%s called\n", __func__);
4284 xpt_freeze_devq_device(struct cam_ed *dev, u_int count)
4286 struct cam_devq *devq;
4289 devq = dev->sim->devq;
4290 mtx_assert(&devq->send_mtx, MA_OWNED);
4291 CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE,
4292 ("xpt_freeze_devq_device(%d) %u->%u\n", count,
4293 dev->ccbq.queue.qfrozen_cnt, dev->ccbq.queue.qfrozen_cnt + count));
4294 freeze = (dev->ccbq.queue.qfrozen_cnt += count);
4295 /* Remove frozen device from sendq. */
4296 if (device_is_queued(dev))
4297 camq_remove(&devq->send_queue, dev->devq_entry.index);
4302 xpt_freeze_devq(struct cam_path *path, u_int count)
4304 struct cam_ed *dev = path->device;
4305 struct cam_devq *devq;
4308 devq = dev->sim->devq;
4309 mtx_lock(&devq->send_mtx);
4310 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_freeze_devq(%d)\n", count));
4311 freeze = xpt_freeze_devq_device(dev, count);
4312 mtx_unlock(&devq->send_mtx);
4317 xpt_freeze_simq(struct cam_sim *sim, u_int count)
4319 struct cam_devq *devq;
4323 mtx_lock(&devq->send_mtx);
4324 freeze = (devq->send_queue.qfrozen_cnt += count);
4325 mtx_unlock(&devq->send_mtx);
4330 xpt_release_devq_timeout(void *arg)
4333 struct cam_devq *devq;
4335 dev = (struct cam_ed *)arg;
4336 CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE, ("xpt_release_devq_timeout\n"));
4337 devq = dev->sim->devq;
4338 mtx_assert(&devq->send_mtx, MA_OWNED);
4339 if (xpt_release_devq_device(dev, /*count*/1, /*run_queue*/TRUE))
4344 xpt_release_devq(struct cam_path *path, u_int count, int run_queue)
4347 struct cam_devq *devq;
4349 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_devq(%d, %d)\n",
4352 devq = dev->sim->devq;
4353 mtx_lock(&devq->send_mtx);
4354 if (xpt_release_devq_device(dev, count, run_queue))
4355 xpt_run_devq(dev->sim->devq);
4356 mtx_unlock(&devq->send_mtx);
4360 xpt_release_devq_device(struct cam_ed *dev, u_int count, int run_queue)
4363 mtx_assert(&dev->sim->devq->send_mtx, MA_OWNED);
4364 CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE,
4365 ("xpt_release_devq_device(%d, %d) %u->%u\n", count, run_queue,
4366 dev->ccbq.queue.qfrozen_cnt, dev->ccbq.queue.qfrozen_cnt - count));
4367 if (count > dev->ccbq.queue.qfrozen_cnt) {
4369 printf("xpt_release_devq(): requested %u > present %u\n",
4370 count, dev->ccbq.queue.qfrozen_cnt);
4372 count = dev->ccbq.queue.qfrozen_cnt;
4374 dev->ccbq.queue.qfrozen_cnt -= count;
4375 if (dev->ccbq.queue.qfrozen_cnt == 0) {
4377 * No longer need to wait for a successful
4378 * command completion.
4380 dev->flags &= ~CAM_DEV_REL_ON_COMPLETE;
4382 * Remove any timeouts that might be scheduled
4383 * to release this queue.
4385 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) {
4386 callout_stop(&dev->callout);
4387 dev->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING;
4390 * Now that we are unfrozen schedule the
4391 * device so any pending transactions are
4394 xpt_schedule_devq(dev->sim->devq, dev);
4401 xpt_release_simq(struct cam_sim *sim, int run_queue)
4403 struct cam_devq *devq;
4406 mtx_lock(&devq->send_mtx);
4407 if (devq->send_queue.qfrozen_cnt <= 0) {
4409 printf("xpt_release_simq: requested 1 > present %u\n",
4410 devq->send_queue.qfrozen_cnt);
4413 devq->send_queue.qfrozen_cnt--;
4414 if (devq->send_queue.qfrozen_cnt == 0) {
4416 * If there is a timeout scheduled to release this
4417 * sim queue, remove it. The queue frozen count is
4420 if ((sim->flags & CAM_SIM_REL_TIMEOUT_PENDING) != 0){
4421 callout_stop(&sim->callout);
4422 sim->flags &= ~CAM_SIM_REL_TIMEOUT_PENDING;
4426 * Now that we are unfrozen run the send queue.
4428 xpt_run_devq(sim->devq);
4431 mtx_unlock(&devq->send_mtx);
4435 * XXX Appears to be unused.
4438 xpt_release_simq_timeout(void *arg)
4440 struct cam_sim *sim;
4442 sim = (struct cam_sim *)arg;
4443 xpt_release_simq(sim, /* run_queue */ TRUE);
4447 xpt_done(union ccb *done_ccb)
4449 struct cam_doneq *queue;
4452 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_done\n"));
4453 if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) == 0)
4456 hash = (done_ccb->ccb_h.path_id + done_ccb->ccb_h.target_id +
4457 done_ccb->ccb_h.target_lun) % cam_num_doneqs;
4458 queue = &cam_doneqs[hash];
4459 mtx_lock(&queue->cam_doneq_mtx);
4460 run = (queue->cam_doneq_sleep && STAILQ_EMPTY(&queue->cam_doneq));
4461 STAILQ_INSERT_TAIL(&queue->cam_doneq, &done_ccb->ccb_h, sim_links.stqe);
4462 done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX;
4463 mtx_unlock(&queue->cam_doneq_mtx);
4465 wakeup(&queue->cam_doneq);
4469 xpt_done_direct(union ccb *done_ccb)
4472 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_done_direct\n"));
4473 if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) == 0)
4476 xpt_done_process(&done_ccb->ccb_h);
4484 new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_WAITOK);
4489 xpt_alloc_ccb_nowait()
4493 new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_NOWAIT);
4498 xpt_free_ccb(union ccb *free_ccb)
4500 free(free_ccb, M_CAMCCB);
4505 /* Private XPT functions */
4508 * Get a CAM control block for the caller. Charge the structure to the device
4509 * referenced by the path. If we don't have sufficient resources to allocate
4510 * more ccbs, we return NULL.
4513 xpt_get_ccb_nowait(struct cam_periph *periph)
4517 new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_NOWAIT);
4518 if (new_ccb == NULL)
4520 periph->periph_allocated++;
4521 cam_ccbq_take_opening(&periph->path->device->ccbq);
4526 xpt_get_ccb(struct cam_periph *periph)
4530 cam_periph_unlock(periph);
4531 new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_WAITOK);
4532 cam_periph_lock(periph);
4533 periph->periph_allocated++;
4534 cam_ccbq_take_opening(&periph->path->device->ccbq);
4539 cam_periph_getccb(struct cam_periph *periph, u_int32_t priority)
4541 struct ccb_hdr *ccb_h;
4543 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("cam_periph_getccb\n"));
4544 cam_periph_assert(periph, MA_OWNED);
4545 while ((ccb_h = SLIST_FIRST(&periph->ccb_list)) == NULL ||
4546 ccb_h->pinfo.priority != priority) {
4547 if (priority < periph->immediate_priority) {
4548 periph->immediate_priority = priority;
4549 xpt_run_allocq(periph, 0);
4551 cam_periph_sleep(periph, &periph->ccb_list, PRIBIO,
4554 SLIST_REMOVE_HEAD(&periph->ccb_list, periph_links.sle);
4555 return ((union ccb *)ccb_h);
4559 xpt_acquire_bus(struct cam_eb *bus)
4568 xpt_release_bus(struct cam_eb *bus)
4572 KASSERT(bus->refcount >= 1, ("bus->refcount >= 1"));
4573 if (--bus->refcount > 0) {
4577 TAILQ_REMOVE(&xsoftc.xpt_busses, bus, links);
4578 xsoftc.bus_generation++;
4580 KASSERT(TAILQ_EMPTY(&bus->et_entries),
4581 ("destroying bus, but target list is not empty"));
4582 cam_sim_release(bus->sim);
4583 mtx_destroy(&bus->eb_mtx);
4584 free(bus, M_CAMXPT);
4587 static struct cam_et *
4588 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id)
4590 struct cam_et *cur_target, *target;
4592 mtx_assert(&xsoftc.xpt_topo_lock, MA_OWNED);
4593 mtx_assert(&bus->eb_mtx, MA_OWNED);
4594 target = (struct cam_et *)malloc(sizeof(*target), M_CAMXPT,
4599 TAILQ_INIT(&target->ed_entries);
4601 target->target_id = target_id;
4602 target->refcount = 1;
4603 target->generation = 0;
4604 target->luns = NULL;
4605 mtx_init(&target->luns_mtx, "CAM LUNs lock", NULL, MTX_DEF);
4606 timevalclear(&target->last_reset);
4608 * Hold a reference to our parent bus so it
4609 * will not go away before we do.
4613 /* Insertion sort into our bus's target list */
4614 cur_target = TAILQ_FIRST(&bus->et_entries);
4615 while (cur_target != NULL && cur_target->target_id < target_id)
4616 cur_target = TAILQ_NEXT(cur_target, links);
4617 if (cur_target != NULL) {
4618 TAILQ_INSERT_BEFORE(cur_target, target, links);
4620 TAILQ_INSERT_TAIL(&bus->et_entries, target, links);
4627 xpt_acquire_target(struct cam_et *target)
4629 struct cam_eb *bus = target->bus;
4631 mtx_lock(&bus->eb_mtx);
4633 mtx_unlock(&bus->eb_mtx);
4637 xpt_release_target(struct cam_et *target)
4639 struct cam_eb *bus = target->bus;
4641 mtx_lock(&bus->eb_mtx);
4642 if (--target->refcount > 0) {
4643 mtx_unlock(&bus->eb_mtx);
4646 TAILQ_REMOVE(&bus->et_entries, target, links);
4648 mtx_unlock(&bus->eb_mtx);
4649 KASSERT(TAILQ_EMPTY(&target->ed_entries),
4650 ("destroying target, but device list is not empty"));
4651 xpt_release_bus(bus);
4652 mtx_destroy(&target->luns_mtx);
4654 free(target->luns, M_CAMXPT);
4655 free(target, M_CAMXPT);
4658 static struct cam_ed *
4659 xpt_alloc_device_default(struct cam_eb *bus, struct cam_et *target,
4662 struct cam_ed *device;
4664 device = xpt_alloc_device(bus, target, lun_id);
4668 device->mintags = 1;
4669 device->maxtags = 1;
4674 xpt_destroy_device(void *context, int pending)
4676 struct cam_ed *device = context;
4678 mtx_lock(&device->device_mtx);
4679 mtx_destroy(&device->device_mtx);
4680 free(device, M_CAMDEV);
4684 xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, lun_id_t lun_id)
4686 struct cam_ed *cur_device, *device;
4687 struct cam_devq *devq;
4690 mtx_assert(&bus->eb_mtx, MA_OWNED);
4691 /* Make space for us in the device queue on our bus */
4692 devq = bus->sim->devq;
4693 mtx_lock(&devq->send_mtx);
4694 status = cam_devq_resize(devq, devq->send_queue.array_size + 1);
4695 mtx_unlock(&devq->send_mtx);
4696 if (status != CAM_REQ_CMP)
4699 device = (struct cam_ed *)malloc(sizeof(*device),
4700 M_CAMDEV, M_NOWAIT|M_ZERO);
4704 cam_init_pinfo(&device->devq_entry);
4705 device->target = target;
4706 device->lun_id = lun_id;
4707 device->sim = bus->sim;
4708 if (cam_ccbq_init(&device->ccbq,
4709 bus->sim->max_dev_openings) != 0) {
4710 free(device, M_CAMDEV);
4713 SLIST_INIT(&device->asyncs);
4714 SLIST_INIT(&device->periphs);
4715 device->generation = 0;
4716 device->flags = CAM_DEV_UNCONFIGURED;
4717 device->tag_delay_count = 0;
4718 device->tag_saved_openings = 0;
4719 device->refcount = 1;
4720 mtx_init(&device->device_mtx, "CAM device lock", NULL, MTX_DEF);
4721 callout_init_mtx(&device->callout, &devq->send_mtx, 0);
4722 TASK_INIT(&device->device_destroy_task, 0, xpt_destroy_device, device);
4724 * Hold a reference to our parent bus so it
4725 * will not go away before we do.
4729 cur_device = TAILQ_FIRST(&target->ed_entries);
4730 while (cur_device != NULL && cur_device->lun_id < lun_id)
4731 cur_device = TAILQ_NEXT(cur_device, links);
4732 if (cur_device != NULL)
4733 TAILQ_INSERT_BEFORE(cur_device, device, links);
4735 TAILQ_INSERT_TAIL(&target->ed_entries, device, links);
4736 target->generation++;
4741 xpt_acquire_device(struct cam_ed *device)
4743 struct cam_eb *bus = device->target->bus;
4745 mtx_lock(&bus->eb_mtx);
4747 mtx_unlock(&bus->eb_mtx);
4751 xpt_release_device(struct cam_ed *device)
4753 struct cam_eb *bus = device->target->bus;
4754 struct cam_devq *devq;
4756 mtx_lock(&bus->eb_mtx);
4757 if (--device->refcount > 0) {
4758 mtx_unlock(&bus->eb_mtx);
4762 TAILQ_REMOVE(&device->target->ed_entries, device,links);
4763 device->target->generation++;
4764 mtx_unlock(&bus->eb_mtx);
4766 /* Release our slot in the devq */
4767 devq = bus->sim->devq;
4768 mtx_lock(&devq->send_mtx);
4769 cam_devq_resize(devq, devq->send_queue.array_size - 1);
4770 mtx_unlock(&devq->send_mtx);
4772 KASSERT(SLIST_EMPTY(&device->periphs),
4773 ("destroying device, but periphs list is not empty"));
4774 KASSERT(device->devq_entry.index == CAM_UNQUEUED_INDEX,
4775 ("destroying device while still queued for ccbs"));
4777 if ((device->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0)
4778 callout_stop(&device->callout);
4780 xpt_release_target(device->target);
4782 cam_ccbq_fini(&device->ccbq);
4784 * Free allocated memory. free(9) does nothing if the
4785 * supplied pointer is NULL, so it is safe to call without
4788 free(device->supported_vpds, M_CAMXPT);
4789 free(device->device_id, M_CAMXPT);
4790 free(device->physpath, M_CAMXPT);
4791 free(device->rcap_buf, M_CAMXPT);
4792 free(device->serial_num, M_CAMXPT);
4793 taskqueue_enqueue(xsoftc.xpt_taskq, &device->device_destroy_task);
4797 xpt_dev_ccbq_resize(struct cam_path *path, int newopenings)
4803 mtx_lock(&dev->sim->devq->send_mtx);
4804 result = cam_ccbq_resize(&dev->ccbq, newopenings);
4805 mtx_unlock(&dev->sim->devq->send_mtx);
4806 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
4807 || (dev->inq_flags & SID_CmdQue) != 0)
4808 dev->tag_saved_openings = newopenings;
4812 static struct cam_eb *
4813 xpt_find_bus(path_id_t path_id)
4818 for (bus = TAILQ_FIRST(&xsoftc.xpt_busses);
4820 bus = TAILQ_NEXT(bus, links)) {
4821 if (bus->path_id == path_id) {
4830 static struct cam_et *
4831 xpt_find_target(struct cam_eb *bus, target_id_t target_id)
4833 struct cam_et *target;
4835 mtx_assert(&bus->eb_mtx, MA_OWNED);
4836 for (target = TAILQ_FIRST(&bus->et_entries);
4838 target = TAILQ_NEXT(target, links)) {
4839 if (target->target_id == target_id) {
4847 static struct cam_ed *
4848 xpt_find_device(struct cam_et *target, lun_id_t lun_id)
4850 struct cam_ed *device;
4852 mtx_assert(&target->bus->eb_mtx, MA_OWNED);
4853 for (device = TAILQ_FIRST(&target->ed_entries);
4855 device = TAILQ_NEXT(device, links)) {
4856 if (device->lun_id == lun_id) {
4865 xpt_start_tags(struct cam_path *path)
4867 struct ccb_relsim crs;
4868 struct cam_ed *device;
4869 struct cam_sim *sim;
4872 device = path->device;
4873 sim = path->bus->sim;
4874 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT;
4875 xpt_freeze_devq(path, /*count*/1);
4876 device->inq_flags |= SID_CmdQue;
4877 if (device->tag_saved_openings != 0)
4878 newopenings = device->tag_saved_openings;
4880 newopenings = min(device->maxtags,
4881 sim->max_tagged_dev_openings);
4882 xpt_dev_ccbq_resize(path, newopenings);
4883 xpt_async(AC_GETDEV_CHANGED, path, NULL);
4884 xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL);
4885 crs.ccb_h.func_code = XPT_REL_SIMQ;
4886 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY;
4888 = crs.release_timeout
4891 xpt_action((union ccb *)&crs);
4895 xpt_stop_tags(struct cam_path *path)
4897 struct ccb_relsim crs;
4898 struct cam_ed *device;
4899 struct cam_sim *sim;
4901 device = path->device;
4902 sim = path->bus->sim;
4903 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT;
4904 device->tag_delay_count = 0;
4905 xpt_freeze_devq(path, /*count*/1);
4906 device->inq_flags &= ~SID_CmdQue;
4907 xpt_dev_ccbq_resize(path, sim->max_dev_openings);
4908 xpt_async(AC_GETDEV_CHANGED, path, NULL);
4909 xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL);
4910 crs.ccb_h.func_code = XPT_REL_SIMQ;
4911 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY;
4913 = crs.release_timeout
4916 xpt_action((union ccb *)&crs);
4920 xpt_boot_delay(void *arg)
4927 xpt_config(void *arg)
4930 * Now that interrupts are enabled, go find our devices
4932 if (taskqueue_start_threads(&xsoftc.xpt_taskq, 1, PRIBIO, "CAM taskq"))
4933 printf("xpt_config: failed to create taskqueue thread.\n");
4935 /* Setup debugging path */
4936 if (cam_dflags != CAM_DEBUG_NONE) {
4937 if (xpt_create_path(&cam_dpath, NULL,
4938 CAM_DEBUG_BUS, CAM_DEBUG_TARGET,
4939 CAM_DEBUG_LUN) != CAM_REQ_CMP) {
4940 printf("xpt_config: xpt_create_path() failed for debug"
4941 " target %d:%d:%d, debugging disabled\n",
4942 CAM_DEBUG_BUS, CAM_DEBUG_TARGET, CAM_DEBUG_LUN);
4943 cam_dflags = CAM_DEBUG_NONE;
4948 periphdriver_init(1);
4950 callout_init(&xsoftc.boot_callout, 1);
4951 callout_reset(&xsoftc.boot_callout, hz * xsoftc.boot_delay / 1000,
4952 xpt_boot_delay, NULL);
4953 /* Fire up rescan thread. */
4954 if (kproc_kthread_add(xpt_scanner_thread, NULL, &cam_proc, NULL, 0, 0,
4955 "cam", "scanner")) {
4956 printf("xpt_config: failed to create rescan thread.\n");
4964 xsoftc.buses_to_config++;
4969 xpt_release_boot(void)
4972 xsoftc.buses_to_config--;
4973 if (xsoftc.buses_to_config == 0 && xsoftc.buses_config_done == 0) {
4974 struct xpt_task *task;
4976 xsoftc.buses_config_done = 1;
4978 /* Call manually because we don't have any busses */
4979 task = malloc(sizeof(struct xpt_task), M_CAMXPT, M_NOWAIT);
4981 TASK_INIT(&task->task, 0, xpt_finishconfig_task, task);
4982 taskqueue_enqueue(taskqueue_thread, &task->task);
4989 * If the given device only has one peripheral attached to it, and if that
4990 * peripheral is the passthrough driver, announce it. This insures that the
4991 * user sees some sort of announcement for every peripheral in their system.
4994 xptpassannouncefunc(struct cam_ed *device, void *arg)
4996 struct cam_periph *periph;
4999 for (periph = SLIST_FIRST(&device->periphs), i = 0; periph != NULL;
5000 periph = SLIST_NEXT(periph, periph_links), i++);
5002 periph = SLIST_FIRST(&device->periphs);
5004 && (strncmp(periph->periph_name, "pass", 4) == 0))
5005 xpt_announce_periph(periph, NULL);
5011 xpt_finishconfig_task(void *context, int pending)
5014 periphdriver_init(2);
5016 * Check for devices with no "standard" peripheral driver
5017 * attached. For any devices like that, announce the
5018 * passthrough driver so the user will see something.
5021 xpt_for_all_devices(xptpassannouncefunc, NULL);
5023 /* Release our hook so that the boot can continue. */
5024 config_intrhook_disestablish(xsoftc.xpt_config_hook);
5025 free(xsoftc.xpt_config_hook, M_CAMXPT);
5026 xsoftc.xpt_config_hook = NULL;
5028 free(context, M_CAMXPT);
5032 xpt_register_async(int event, ac_callback_t *cbfunc, void *cbarg,
5033 struct cam_path *path)
5035 struct ccb_setasync csa;
5040 status = xpt_create_path(&path, /*periph*/NULL, CAM_XPT_PATH_ID,
5041 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
5042 if (status != CAM_REQ_CMP)
5044 xpt_path_lock(path);
5048 xpt_setup_ccb(&csa.ccb_h, path, CAM_PRIORITY_NORMAL);
5049 csa.ccb_h.func_code = XPT_SASYNC_CB;
5050 csa.event_enable = event;
5051 csa.callback = cbfunc;
5052 csa.callback_arg = cbarg;
5053 xpt_action((union ccb *)&csa);
5054 status = csa.ccb_h.status;
5057 xpt_path_unlock(path);
5058 xpt_free_path(path);
5061 if ((status == CAM_REQ_CMP) &&
5062 (csa.event_enable & AC_FOUND_DEVICE)) {
5064 * Get this peripheral up to date with all
5065 * the currently existing devices.
5067 xpt_for_all_devices(xptsetasyncfunc, &csa);
5069 if ((status == CAM_REQ_CMP) &&
5070 (csa.event_enable & AC_PATH_REGISTERED)) {
5072 * Get this peripheral up to date with all
5073 * the currently existing busses.
5075 xpt_for_all_busses(xptsetasyncbusfunc, &csa);
5082 xptaction(struct cam_sim *sim, union ccb *work_ccb)
5084 CAM_DEBUG(work_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xptaction\n"));
5086 switch (work_ccb->ccb_h.func_code) {
5087 /* Common cases first */
5088 case XPT_PATH_INQ: /* Path routing inquiry */
5090 struct ccb_pathinq *cpi;
5092 cpi = &work_ccb->cpi;
5093 cpi->version_num = 1; /* XXX??? */
5094 cpi->hba_inquiry = 0;
5095 cpi->target_sprt = 0;
5097 cpi->hba_eng_cnt = 0;
5098 cpi->max_target = 0;
5100 cpi->initiator_id = 0;
5101 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
5102 strncpy(cpi->hba_vid, "", HBA_IDLEN);
5103 strncpy(cpi->dev_name, sim->sim_name, DEV_IDLEN);
5104 cpi->unit_number = sim->unit_number;
5105 cpi->bus_id = sim->bus_id;
5106 cpi->base_transfer_speed = 0;
5107 cpi->protocol = PROTO_UNSPECIFIED;
5108 cpi->protocol_version = PROTO_VERSION_UNSPECIFIED;
5109 cpi->transport = XPORT_UNSPECIFIED;
5110 cpi->transport_version = XPORT_VERSION_UNSPECIFIED;
5111 cpi->ccb_h.status = CAM_REQ_CMP;
5116 work_ccb->ccb_h.status = CAM_REQ_INVALID;
5123 * The xpt as a "controller" has no interrupt sources, so polling
5127 xptpoll(struct cam_sim *sim)
5132 xpt_lock_buses(void)
5134 mtx_lock(&xsoftc.xpt_topo_lock);
5138 xpt_unlock_buses(void)
5140 mtx_unlock(&xsoftc.xpt_topo_lock);
5144 xpt_path_mtx(struct cam_path *path)
5147 return (&path->device->device_mtx);
5151 xpt_done_process(struct ccb_hdr *ccb_h)
5153 struct cam_sim *sim;
5154 struct cam_devq *devq;
5155 struct mtx *mtx = NULL;
5157 if (ccb_h->flags & CAM_HIGH_POWER) {
5158 struct highpowerlist *hphead;
5159 struct cam_ed *device;
5161 mtx_lock(&xsoftc.xpt_highpower_lock);
5162 hphead = &xsoftc.highpowerq;
5164 device = STAILQ_FIRST(hphead);
5167 * Increment the count since this command is done.
5169 xsoftc.num_highpower++;
5172 * Any high powered commands queued up?
5174 if (device != NULL) {
5176 STAILQ_REMOVE_HEAD(hphead, highpowerq_entry);
5177 mtx_unlock(&xsoftc.xpt_highpower_lock);
5179 mtx_lock(&device->sim->devq->send_mtx);
5180 xpt_release_devq_device(device,
5181 /*count*/1, /*runqueue*/TRUE);
5182 mtx_unlock(&device->sim->devq->send_mtx);
5184 mtx_unlock(&xsoftc.xpt_highpower_lock);
5187 sim = ccb_h->path->bus->sim;
5189 if (ccb_h->status & CAM_RELEASE_SIMQ) {
5190 xpt_release_simq(sim, /*run_queue*/FALSE);
5191 ccb_h->status &= ~CAM_RELEASE_SIMQ;
5194 if ((ccb_h->flags & CAM_DEV_QFRZDIS)
5195 && (ccb_h->status & CAM_DEV_QFRZN)) {
5196 xpt_release_devq(ccb_h->path, /*count*/1, /*run_queue*/TRUE);
5197 ccb_h->status &= ~CAM_DEV_QFRZN;
5201 if ((ccb_h->func_code & XPT_FC_USER_CCB) == 0) {
5202 struct cam_ed *dev = ccb_h->path->device;
5204 mtx_lock(&devq->send_mtx);
5205 devq->send_active--;
5206 devq->send_openings++;
5207 cam_ccbq_ccb_done(&dev->ccbq, (union ccb *)ccb_h);
5209 if (((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0
5210 && (dev->ccbq.dev_active == 0))) {
5211 dev->flags &= ~CAM_DEV_REL_ON_QUEUE_EMPTY;
5212 xpt_release_devq_device(dev, /*count*/1,
5213 /*run_queue*/FALSE);
5216 if (((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0
5217 && (ccb_h->status&CAM_STATUS_MASK) != CAM_REQUEUE_REQ)) {
5218 dev->flags &= ~CAM_DEV_REL_ON_COMPLETE;
5219 xpt_release_devq_device(dev, /*count*/1,
5220 /*run_queue*/FALSE);
5223 if (!device_is_queued(dev))
5224 (void)xpt_schedule_devq(devq, dev);
5226 mtx_unlock(&devq->send_mtx);
5228 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0) {
5229 mtx = xpt_path_mtx(ccb_h->path);
5232 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
5233 && (--dev->tag_delay_count == 0))
5234 xpt_start_tags(ccb_h->path);
5238 if ((ccb_h->flags & CAM_UNLOCKED) == 0) {
5240 mtx = xpt_path_mtx(ccb_h->path);
5250 /* Call the peripheral driver's callback */
5251 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX;
5252 (*ccb_h->cbfcnp)(ccb_h->path->periph, (union ccb *)ccb_h);
5258 xpt_done_td(void *arg)
5260 struct cam_doneq *queue = arg;
5261 struct ccb_hdr *ccb_h;
5262 STAILQ_HEAD(, ccb_hdr) doneq;
5264 STAILQ_INIT(&doneq);
5265 mtx_lock(&queue->cam_doneq_mtx);
5267 while (STAILQ_EMPTY(&queue->cam_doneq)) {
5268 queue->cam_doneq_sleep = 1;
5269 msleep(&queue->cam_doneq, &queue->cam_doneq_mtx,
5271 queue->cam_doneq_sleep = 0;
5273 STAILQ_CONCAT(&doneq, &queue->cam_doneq);
5274 mtx_unlock(&queue->cam_doneq_mtx);
5276 THREAD_NO_SLEEPING();
5277 while ((ccb_h = STAILQ_FIRST(&doneq)) != NULL) {
5278 STAILQ_REMOVE_HEAD(&doneq, sim_links.stqe);
5279 xpt_done_process(ccb_h);
5281 THREAD_SLEEPING_OK();
5283 mtx_lock(&queue->cam_doneq_mtx);
5288 camisr_runqueue(void)
5290 struct ccb_hdr *ccb_h;
5291 struct cam_doneq *queue;
5294 /* Process global queues. */
5295 for (i = 0; i < cam_num_doneqs; i++) {
5296 queue = &cam_doneqs[i];
5297 mtx_lock(&queue->cam_doneq_mtx);
5298 while ((ccb_h = STAILQ_FIRST(&queue->cam_doneq)) != NULL) {
5299 STAILQ_REMOVE_HEAD(&queue->cam_doneq, sim_links.stqe);
5300 mtx_unlock(&queue->cam_doneq_mtx);
5301 xpt_done_process(ccb_h);
5302 mtx_lock(&queue->cam_doneq_mtx);
5304 mtx_unlock(&queue->cam_doneq_mtx);