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 MTX_SYSINIT(xpt_topo_init, &xsoftc.xpt_topo_lock, "XPT topology lock", MTX_DEF);
154 TUNABLE_INT("kern.cam.boot_delay", &xsoftc.boot_delay);
155 SYSCTL_INT(_kern_cam, OID_AUTO, boot_delay, CTLFLAG_RDTUN,
156 &xsoftc.boot_delay, 0, "Bus registration wait time");
159 struct mtx_padalign cam_doneq_mtx;
160 STAILQ_HEAD(, ccb_hdr) cam_doneq;
164 static struct cam_doneq cam_doneqs[MAXCPU];
165 static int cam_num_doneqs;
166 static struct proc *cam_proc;
168 TUNABLE_INT("kern.cam.num_doneqs", &cam_num_doneqs);
169 SYSCTL_INT(_kern_cam, OID_AUTO, num_doneqs, CTLFLAG_RDTUN,
170 &cam_num_doneqs, 0, "Number of completion queues/threads");
172 struct cam_periph *xpt_periph;
174 static periph_init_t xpt_periph_init;
176 static struct periph_driver xpt_driver =
178 xpt_periph_init, "xpt",
179 TAILQ_HEAD_INITIALIZER(xpt_driver.units), /* generation */ 0,
183 PERIPHDRIVER_DECLARE(xpt, xpt_driver);
185 static d_open_t xptopen;
186 static d_close_t xptclose;
187 static d_ioctl_t xptioctl;
188 static d_ioctl_t xptdoioctl;
190 static struct cdevsw xpt_cdevsw = {
191 .d_version = D_VERSION,
199 /* Storage for debugging datastructures */
200 struct cam_path *cam_dpath;
201 u_int32_t cam_dflags = CAM_DEBUG_FLAGS;
202 TUNABLE_INT("kern.cam.dflags", &cam_dflags);
203 SYSCTL_UINT(_kern_cam, OID_AUTO, dflags, CTLFLAG_RW,
204 &cam_dflags, 0, "Enabled debug flags");
205 u_int32_t cam_debug_delay = CAM_DEBUG_DELAY;
206 TUNABLE_INT("kern.cam.debug_delay", &cam_debug_delay);
207 SYSCTL_UINT(_kern_cam, OID_AUTO, debug_delay, CTLFLAG_RW,
208 &cam_debug_delay, 0, "Delay in us after each debug message");
210 /* Our boot-time initialization hook */
211 static int cam_module_event_handler(module_t, int /*modeventtype_t*/, void *);
213 static moduledata_t cam_moduledata = {
215 cam_module_event_handler,
219 static int xpt_init(void *);
221 DECLARE_MODULE(cam, cam_moduledata, SI_SUB_CONFIGURE, SI_ORDER_SECOND);
222 MODULE_VERSION(cam, 1);
225 static void xpt_async_bcast(struct async_list *async_head,
226 u_int32_t async_code,
227 struct cam_path *path,
229 static path_id_t xptnextfreepathid(void);
230 static path_id_t xptpathid(const char *sim_name, int sim_unit, int sim_bus);
231 static union ccb *xpt_get_ccb(struct cam_periph *periph);
232 static union ccb *xpt_get_ccb_nowait(struct cam_periph *periph);
233 static void xpt_run_allocq(struct cam_periph *periph, int sleep);
234 static void xpt_run_allocq_task(void *context, int pending);
235 static void xpt_run_devq(struct cam_devq *devq);
236 static timeout_t xpt_release_devq_timeout;
237 static void xpt_release_simq_timeout(void *arg) __unused;
238 static void xpt_acquire_bus(struct cam_eb *bus);
239 static void xpt_release_bus(struct cam_eb *bus);
240 static uint32_t xpt_freeze_devq_device(struct cam_ed *dev, u_int count);
241 static int xpt_release_devq_device(struct cam_ed *dev, u_int count,
243 static struct cam_et*
244 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id);
245 static void xpt_acquire_target(struct cam_et *target);
246 static void xpt_release_target(struct cam_et *target);
247 static struct cam_eb*
248 xpt_find_bus(path_id_t path_id);
249 static struct cam_et*
250 xpt_find_target(struct cam_eb *bus, target_id_t target_id);
251 static struct cam_ed*
252 xpt_find_device(struct cam_et *target, lun_id_t lun_id);
253 static void xpt_config(void *arg);
254 static int xpt_schedule_dev(struct camq *queue, cam_pinfo *dev_pinfo,
255 u_int32_t new_priority);
256 static xpt_devicefunc_t xptpassannouncefunc;
257 static void xptaction(struct cam_sim *sim, union ccb *work_ccb);
258 static void xptpoll(struct cam_sim *sim);
259 static void camisr_runqueue(void);
260 static void xpt_done_process(struct ccb_hdr *ccb_h);
261 static void xpt_done_td(void *);
262 static dev_match_ret xptbusmatch(struct dev_match_pattern *patterns,
263 u_int num_patterns, struct cam_eb *bus);
264 static dev_match_ret xptdevicematch(struct dev_match_pattern *patterns,
266 struct cam_ed *device);
267 static dev_match_ret xptperiphmatch(struct dev_match_pattern *patterns,
269 struct cam_periph *periph);
270 static xpt_busfunc_t xptedtbusfunc;
271 static xpt_targetfunc_t xptedttargetfunc;
272 static xpt_devicefunc_t xptedtdevicefunc;
273 static xpt_periphfunc_t xptedtperiphfunc;
274 static xpt_pdrvfunc_t xptplistpdrvfunc;
275 static xpt_periphfunc_t xptplistperiphfunc;
276 static int xptedtmatch(struct ccb_dev_match *cdm);
277 static int xptperiphlistmatch(struct ccb_dev_match *cdm);
278 static int xptbustraverse(struct cam_eb *start_bus,
279 xpt_busfunc_t *tr_func, void *arg);
280 static int xpttargettraverse(struct cam_eb *bus,
281 struct cam_et *start_target,
282 xpt_targetfunc_t *tr_func, void *arg);
283 static int xptdevicetraverse(struct cam_et *target,
284 struct cam_ed *start_device,
285 xpt_devicefunc_t *tr_func, void *arg);
286 static int xptperiphtraverse(struct cam_ed *device,
287 struct cam_periph *start_periph,
288 xpt_periphfunc_t *tr_func, void *arg);
289 static int xptpdrvtraverse(struct periph_driver **start_pdrv,
290 xpt_pdrvfunc_t *tr_func, void *arg);
291 static int xptpdperiphtraverse(struct periph_driver **pdrv,
292 struct cam_periph *start_periph,
293 xpt_periphfunc_t *tr_func,
295 static xpt_busfunc_t xptdefbusfunc;
296 static xpt_targetfunc_t xptdeftargetfunc;
297 static xpt_devicefunc_t xptdefdevicefunc;
298 static xpt_periphfunc_t xptdefperiphfunc;
299 static void xpt_finishconfig_task(void *context, int pending);
300 static void xpt_dev_async_default(u_int32_t async_code,
302 struct cam_et *target,
303 struct cam_ed *device,
305 static struct cam_ed * xpt_alloc_device_default(struct cam_eb *bus,
306 struct cam_et *target,
308 static xpt_devicefunc_t xptsetasyncfunc;
309 static xpt_busfunc_t xptsetasyncbusfunc;
310 static cam_status xptregister(struct cam_periph *periph,
312 static __inline int device_is_queued(struct cam_ed *device);
315 xpt_schedule_devq(struct cam_devq *devq, struct cam_ed *dev)
319 mtx_assert(&devq->send_mtx, MA_OWNED);
320 if ((dev->ccbq.queue.entries > 0) &&
321 (dev->ccbq.dev_openings > 0) &&
322 (dev->ccbq.queue.qfrozen_cnt == 0)) {
324 * The priority of a device waiting for controller
325 * resources is that of the highest priority CCB
329 xpt_schedule_dev(&devq->send_queue,
331 CAMQ_GET_PRIO(&dev->ccbq.queue));
339 device_is_queued(struct cam_ed *device)
341 return (device->devq_entry.index != CAM_UNQUEUED_INDEX);
347 make_dev(&xpt_cdevsw, 0, UID_ROOT, GID_OPERATOR, 0600, "xpt0");
351 xptopen(struct cdev *dev, int flags, int fmt, struct thread *td)
355 * Only allow read-write access.
357 if (((flags & FWRITE) == 0) || ((flags & FREAD) == 0))
361 * We don't allow nonblocking access.
363 if ((flags & O_NONBLOCK) != 0) {
364 printf("%s: can't do nonblocking access\n", devtoname(dev));
372 xptclose(struct cdev *dev, int flag, int fmt, struct thread *td)
379 * Don't automatically grab the xpt softc lock here even though this is going
380 * through the xpt device. The xpt device is really just a back door for
381 * accessing other devices and SIMs, so the right thing to do is to grab
382 * the appropriate SIM lock once the bus/SIM is located.
385 xptioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
389 if ((error = xptdoioctl(dev, cmd, addr, flag, td)) == ENOTTY) {
390 error = cam_compat_ioctl(dev, cmd, addr, flag, td, xptdoioctl);
396 xptdoioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
404 * For the transport layer CAMIOCOMMAND ioctl, we really only want
405 * to accept CCB types that don't quite make sense to send through a
406 * passthrough driver. XPT_PATH_INQ is an exception to this, as stated
414 inccb = (union ccb *)addr;
416 bus = xpt_find_bus(inccb->ccb_h.path_id);
420 switch (inccb->ccb_h.func_code) {
423 if (inccb->ccb_h.target_id != CAM_TARGET_WILDCARD ||
424 inccb->ccb_h.target_lun != CAM_LUN_WILDCARD) {
425 xpt_release_bus(bus);
430 if (inccb->ccb_h.target_id == CAM_TARGET_WILDCARD ||
431 inccb->ccb_h.target_lun != CAM_LUN_WILDCARD) {
432 xpt_release_bus(bus);
440 switch(inccb->ccb_h.func_code) {
448 ccb = xpt_alloc_ccb();
451 * Create a path using the bus, target, and lun the
454 if (xpt_create_path(&ccb->ccb_h.path, NULL,
455 inccb->ccb_h.path_id,
456 inccb->ccb_h.target_id,
457 inccb->ccb_h.target_lun) !=
463 /* Ensure all of our fields are correct */
464 xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path,
465 inccb->ccb_h.pinfo.priority);
466 xpt_merge_ccb(ccb, inccb);
467 xpt_path_lock(ccb->ccb_h.path);
468 cam_periph_runccb(ccb, NULL, 0, 0, NULL);
469 xpt_path_unlock(ccb->ccb_h.path);
470 bcopy(ccb, inccb, sizeof(union ccb));
471 xpt_free_path(ccb->ccb_h.path);
479 * This is an immediate CCB, so it's okay to
480 * allocate it on the stack.
484 * Create a path using the bus, target, and lun the
487 if (xpt_create_path(&ccb.ccb_h.path, NULL,
488 inccb->ccb_h.path_id,
489 inccb->ccb_h.target_id,
490 inccb->ccb_h.target_lun) !=
495 /* Ensure all of our fields are correct */
496 xpt_setup_ccb(&ccb.ccb_h, ccb.ccb_h.path,
497 inccb->ccb_h.pinfo.priority);
498 xpt_merge_ccb(&ccb, inccb);
500 bcopy(&ccb, inccb, sizeof(union ccb));
501 xpt_free_path(ccb.ccb_h.path);
505 case XPT_DEV_MATCH: {
506 struct cam_periph_map_info mapinfo;
507 struct cam_path *old_path;
510 * We can't deal with physical addresses for this
511 * type of transaction.
513 if ((inccb->ccb_h.flags & CAM_DATA_MASK) !=
520 * Save this in case the caller had it set to
521 * something in particular.
523 old_path = inccb->ccb_h.path;
526 * We really don't need a path for the matching
527 * code. The path is needed because of the
528 * debugging statements in xpt_action(). They
529 * assume that the CCB has a valid path.
531 inccb->ccb_h.path = xpt_periph->path;
533 bzero(&mapinfo, sizeof(mapinfo));
536 * Map the pattern and match buffers into kernel
537 * virtual address space.
539 error = cam_periph_mapmem(inccb, &mapinfo);
542 inccb->ccb_h.path = old_path;
547 * This is an immediate CCB, we can send it on directly.
552 * Map the buffers back into user space.
554 cam_periph_unmapmem(inccb, &mapinfo);
556 inccb->ccb_h.path = old_path;
565 xpt_release_bus(bus);
569 * This is the getpassthru ioctl. It takes a XPT_GDEVLIST ccb as input,
570 * with the periphal driver name and unit name filled in. The other
571 * fields don't really matter as input. The passthrough driver name
572 * ("pass"), and unit number are passed back in the ccb. The current
573 * device generation number, and the index into the device peripheral
574 * driver list, and the status are also passed back. Note that
575 * since we do everything in one pass, unlike the XPT_GDEVLIST ccb,
576 * we never return a status of CAM_GDEVLIST_LIST_CHANGED. It is
577 * (or rather should be) impossible for the device peripheral driver
578 * list to change since we look at the whole thing in one pass, and
579 * we do it with lock protection.
582 case CAMGETPASSTHRU: {
584 struct cam_periph *periph;
585 struct periph_driver **p_drv;
588 int base_periph_found;
590 ccb = (union ccb *)addr;
591 unit = ccb->cgdl.unit_number;
592 name = ccb->cgdl.periph_name;
593 base_periph_found = 0;
596 * Sanity check -- make sure we don't get a null peripheral
599 if (*ccb->cgdl.periph_name == '\0') {
604 /* Keep the list from changing while we traverse it */
607 /* first find our driver in the list of drivers */
608 for (p_drv = periph_drivers; *p_drv != NULL; p_drv++)
609 if (strcmp((*p_drv)->driver_name, name) == 0)
612 if (*p_drv == NULL) {
614 ccb->ccb_h.status = CAM_REQ_CMP_ERR;
615 ccb->cgdl.status = CAM_GDEVLIST_ERROR;
616 *ccb->cgdl.periph_name = '\0';
617 ccb->cgdl.unit_number = 0;
623 * Run through every peripheral instance of this driver
624 * and check to see whether it matches the unit passed
625 * in by the user. If it does, get out of the loops and
626 * find the passthrough driver associated with that
629 for (periph = TAILQ_FIRST(&(*p_drv)->units); periph != NULL;
630 periph = TAILQ_NEXT(periph, unit_links)) {
632 if (periph->unit_number == unit)
636 * If we found the peripheral driver that the user passed
637 * in, go through all of the peripheral drivers for that
638 * particular device and look for a passthrough driver.
640 if (periph != NULL) {
641 struct cam_ed *device;
644 base_periph_found = 1;
645 device = periph->path->device;
646 for (i = 0, periph = SLIST_FIRST(&device->periphs);
648 periph = SLIST_NEXT(periph, periph_links), i++) {
650 * Check to see whether we have a
651 * passthrough device or not.
653 if (strcmp(periph->periph_name, "pass") == 0) {
655 * Fill in the getdevlist fields.
657 strcpy(ccb->cgdl.periph_name,
658 periph->periph_name);
659 ccb->cgdl.unit_number =
661 if (SLIST_NEXT(periph, periph_links))
663 CAM_GDEVLIST_MORE_DEVS;
666 CAM_GDEVLIST_LAST_DEVICE;
667 ccb->cgdl.generation =
671 * Fill in some CCB header fields
672 * that the user may want.
675 periph->path->bus->path_id;
676 ccb->ccb_h.target_id =
677 periph->path->target->target_id;
678 ccb->ccb_h.target_lun =
679 periph->path->device->lun_id;
680 ccb->ccb_h.status = CAM_REQ_CMP;
687 * If the periph is null here, one of two things has
688 * happened. The first possibility is that we couldn't
689 * find the unit number of the particular peripheral driver
690 * that the user is asking about. e.g. the user asks for
691 * the passthrough driver for "da11". We find the list of
692 * "da" peripherals all right, but there is no unit 11.
693 * The other possibility is that we went through the list
694 * of peripheral drivers attached to the device structure,
695 * but didn't find one with the name "pass". Either way,
696 * we return ENOENT, since we couldn't find something.
698 if (periph == NULL) {
699 ccb->ccb_h.status = CAM_REQ_CMP_ERR;
700 ccb->cgdl.status = CAM_GDEVLIST_ERROR;
701 *ccb->cgdl.periph_name = '\0';
702 ccb->cgdl.unit_number = 0;
705 * It is unfortunate that this is even necessary,
706 * but there are many, many clueless users out there.
707 * If this is true, the user is looking for the
708 * passthrough driver, but doesn't have one in his
711 if (base_periph_found == 1) {
712 printf("xptioctl: pass driver is not in the "
714 printf("xptioctl: put \"device pass\" in "
715 "your kernel config file\n");
730 cam_module_event_handler(module_t mod, int what, void *arg)
736 if ((error = xpt_init(NULL)) != 0)
749 xpt_rescan_done(struct cam_periph *periph, union ccb *done_ccb)
752 if (done_ccb->ccb_h.ppriv_ptr1 == NULL) {
753 xpt_free_path(done_ccb->ccb_h.path);
754 xpt_free_ccb(done_ccb);
756 done_ccb->ccb_h.cbfcnp = done_ccb->ccb_h.ppriv_ptr1;
757 (*done_ccb->ccb_h.cbfcnp)(periph, done_ccb);
762 /* thread to handle bus rescans */
764 xpt_scanner_thread(void *dummy)
767 struct cam_path path;
771 if (TAILQ_EMPTY(&xsoftc.ccb_scanq))
772 msleep(&xsoftc.ccb_scanq, &xsoftc.xpt_topo_lock, PRIBIO,
774 if ((ccb = (union ccb *)TAILQ_FIRST(&xsoftc.ccb_scanq)) != NULL) {
775 TAILQ_REMOVE(&xsoftc.ccb_scanq, &ccb->ccb_h, sim_links.tqe);
779 * Since lock can be dropped inside and path freed
780 * by completion callback even before return here,
781 * take our own path copy for reference.
783 xpt_copy_path(&path, ccb->ccb_h.path);
784 xpt_path_lock(&path);
786 xpt_path_unlock(&path);
787 xpt_release_path(&path);
795 xpt_rescan(union ccb *ccb)
799 /* Prepare request */
800 if (ccb->ccb_h.path->target->target_id == CAM_TARGET_WILDCARD &&
801 ccb->ccb_h.path->device->lun_id == CAM_LUN_WILDCARD)
802 ccb->ccb_h.func_code = XPT_SCAN_BUS;
803 else if (ccb->ccb_h.path->target->target_id != CAM_TARGET_WILDCARD &&
804 ccb->ccb_h.path->device->lun_id == CAM_LUN_WILDCARD)
805 ccb->ccb_h.func_code = XPT_SCAN_TGT;
806 else if (ccb->ccb_h.path->target->target_id != CAM_TARGET_WILDCARD &&
807 ccb->ccb_h.path->device->lun_id != CAM_LUN_WILDCARD)
808 ccb->ccb_h.func_code = XPT_SCAN_LUN;
810 xpt_print(ccb->ccb_h.path, "illegal scan path\n");
811 xpt_free_path(ccb->ccb_h.path);
815 ccb->ccb_h.ppriv_ptr1 = ccb->ccb_h.cbfcnp;
816 ccb->ccb_h.cbfcnp = xpt_rescan_done;
817 xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path, CAM_PRIORITY_XPT);
818 /* Don't make duplicate entries for the same paths. */
820 if (ccb->ccb_h.ppriv_ptr1 == NULL) {
821 TAILQ_FOREACH(hdr, &xsoftc.ccb_scanq, sim_links.tqe) {
822 if (xpt_path_comp(hdr->path, ccb->ccb_h.path) == 0) {
823 wakeup(&xsoftc.ccb_scanq);
825 xpt_print(ccb->ccb_h.path, "rescan already queued\n");
826 xpt_free_path(ccb->ccb_h.path);
832 TAILQ_INSERT_TAIL(&xsoftc.ccb_scanq, &ccb->ccb_h, sim_links.tqe);
833 xsoftc.buses_to_config++;
834 wakeup(&xsoftc.ccb_scanq);
838 /* Functions accessed by the peripheral drivers */
840 xpt_init(void *dummy)
842 struct cam_sim *xpt_sim;
843 struct cam_path *path;
844 struct cam_devq *devq;
848 TAILQ_INIT(&xsoftc.xpt_busses);
849 TAILQ_INIT(&xsoftc.ccb_scanq);
850 STAILQ_INIT(&xsoftc.highpowerq);
851 xsoftc.num_highpower = CAM_MAX_HIGHPOWER;
853 mtx_init(&xsoftc.xpt_lock, "XPT lock", NULL, MTX_DEF);
854 mtx_init(&xsoftc.xpt_highpower_lock, "XPT highpower lock", NULL, MTX_DEF);
855 xsoftc.xpt_taskq = taskqueue_create("CAM XPT task", M_WAITOK,
856 taskqueue_thread_enqueue, /*context*/&xsoftc.xpt_taskq);
858 #ifdef CAM_BOOT_DELAY
860 * Override this value at compile time to assist our users
861 * who don't use loader to boot a kernel.
863 xsoftc.boot_delay = CAM_BOOT_DELAY;
866 * The xpt layer is, itself, the equivelent of a SIM.
867 * Allow 16 ccbs in the ccb pool for it. This should
868 * give decent parallelism when we probe busses and
869 * perform other XPT functions.
871 devq = cam_simq_alloc(16);
872 xpt_sim = cam_sim_alloc(xptaction,
877 /*mtx*/&xsoftc.xpt_lock,
878 /*max_dev_transactions*/0,
879 /*max_tagged_dev_transactions*/0,
884 mtx_lock(&xsoftc.xpt_lock);
885 if ((status = xpt_bus_register(xpt_sim, NULL, 0)) != CAM_SUCCESS) {
886 mtx_unlock(&xsoftc.xpt_lock);
887 printf("xpt_init: xpt_bus_register failed with status %#x,"
888 " failing attach\n", status);
891 mtx_unlock(&xsoftc.xpt_lock);
894 * Looking at the XPT from the SIM layer, the XPT is
895 * the equivelent of a peripheral driver. Allocate
896 * a peripheral driver entry for us.
898 if ((status = xpt_create_path(&path, NULL, CAM_XPT_PATH_ID,
900 CAM_LUN_WILDCARD)) != CAM_REQ_CMP) {
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 if (idd->length < len) {
1145 for (l = 0; l < idd->length; l++)
1146 buf[l] = idd->identifier[l] ?
1147 idd->identifier[l] : ' ';
1151 } else if ((idd->proto_codeset & SVPD_ID_CODESET_MASK) == SVPD_ID_CODESET_UTF8) {
1152 l = strnlen(idd->identifier, idd->length);
1154 bcopy(idd->identifier, buf, l);
1159 if (idd->length * 2 < len) {
1160 for (l = 0; l < idd->length; l++)
1161 sprintf(buf + l * 2, "%02x",
1162 idd->identifier[l]);
1168 if (strlcpy(buf, cdai.buf, len) >= len)
1173 if (cdai.buf != NULL)
1174 free(cdai.buf, M_CAMXPT);
1178 static dev_match_ret
1179 xptbusmatch(struct dev_match_pattern *patterns, u_int num_patterns,
1182 dev_match_ret retval;
1185 retval = DM_RET_NONE;
1188 * If we aren't given something to match against, that's an error.
1191 return(DM_RET_ERROR);
1194 * If there are no match entries, then this bus matches no
1197 if ((patterns == NULL) || (num_patterns == 0))
1198 return(DM_RET_DESCEND | DM_RET_COPY);
1200 for (i = 0; i < num_patterns; i++) {
1201 struct bus_match_pattern *cur_pattern;
1204 * If the pattern in question isn't for a bus node, we
1205 * aren't interested. However, we do indicate to the
1206 * calling routine that we should continue descending the
1207 * tree, since the user wants to match against lower-level
1210 if (patterns[i].type != DEV_MATCH_BUS) {
1211 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1212 retval |= DM_RET_DESCEND;
1216 cur_pattern = &patterns[i].pattern.bus_pattern;
1219 * If they want to match any bus node, we give them any
1222 if (cur_pattern->flags == BUS_MATCH_ANY) {
1223 /* set the copy flag */
1224 retval |= DM_RET_COPY;
1227 * If we've already decided on an action, go ahead
1230 if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE)
1235 * Not sure why someone would do this...
1237 if (cur_pattern->flags == BUS_MATCH_NONE)
1240 if (((cur_pattern->flags & BUS_MATCH_PATH) != 0)
1241 && (cur_pattern->path_id != bus->path_id))
1244 if (((cur_pattern->flags & BUS_MATCH_BUS_ID) != 0)
1245 && (cur_pattern->bus_id != bus->sim->bus_id))
1248 if (((cur_pattern->flags & BUS_MATCH_UNIT) != 0)
1249 && (cur_pattern->unit_number != bus->sim->unit_number))
1252 if (((cur_pattern->flags & BUS_MATCH_NAME) != 0)
1253 && (strncmp(cur_pattern->dev_name, bus->sim->sim_name,
1258 * If we get to this point, the user definitely wants
1259 * information on this bus. So tell the caller to copy the
1262 retval |= DM_RET_COPY;
1265 * If the return action has been set to descend, then we
1266 * know that we've already seen a non-bus matching
1267 * expression, therefore we need to further descend the tree.
1268 * This won't change by continuing around the loop, so we
1269 * go ahead and return. If we haven't seen a non-bus
1270 * matching expression, we keep going around the loop until
1271 * we exhaust the matching expressions. We'll set the stop
1272 * flag once we fall out of the loop.
1274 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND)
1279 * If the return action hasn't been set to descend yet, that means
1280 * we haven't seen anything other than bus matching patterns. So
1281 * tell the caller to stop descending the tree -- the user doesn't
1282 * want to match against lower level tree elements.
1284 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1285 retval |= DM_RET_STOP;
1290 static dev_match_ret
1291 xptdevicematch(struct dev_match_pattern *patterns, u_int num_patterns,
1292 struct cam_ed *device)
1294 dev_match_ret retval;
1297 retval = DM_RET_NONE;
1300 * If we aren't given something to match against, that's an error.
1303 return(DM_RET_ERROR);
1306 * If there are no match entries, then this device matches no
1309 if ((patterns == NULL) || (num_patterns == 0))
1310 return(DM_RET_DESCEND | DM_RET_COPY);
1312 for (i = 0; i < num_patterns; i++) {
1313 struct device_match_pattern *cur_pattern;
1314 struct scsi_vpd_device_id *device_id_page;
1317 * If the pattern in question isn't for a device node, we
1318 * aren't interested.
1320 if (patterns[i].type != DEV_MATCH_DEVICE) {
1321 if ((patterns[i].type == DEV_MATCH_PERIPH)
1322 && ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE))
1323 retval |= DM_RET_DESCEND;
1327 cur_pattern = &patterns[i].pattern.device_pattern;
1329 /* Error out if mutually exclusive options are specified. */
1330 if ((cur_pattern->flags & (DEV_MATCH_INQUIRY|DEV_MATCH_DEVID))
1331 == (DEV_MATCH_INQUIRY|DEV_MATCH_DEVID))
1332 return(DM_RET_ERROR);
1335 * If they want to match any device node, we give them any
1338 if (cur_pattern->flags == DEV_MATCH_ANY)
1342 * Not sure why someone would do this...
1344 if (cur_pattern->flags == DEV_MATCH_NONE)
1347 if (((cur_pattern->flags & DEV_MATCH_PATH) != 0)
1348 && (cur_pattern->path_id != device->target->bus->path_id))
1351 if (((cur_pattern->flags & DEV_MATCH_TARGET) != 0)
1352 && (cur_pattern->target_id != device->target->target_id))
1355 if (((cur_pattern->flags & DEV_MATCH_LUN) != 0)
1356 && (cur_pattern->target_lun != device->lun_id))
1359 if (((cur_pattern->flags & DEV_MATCH_INQUIRY) != 0)
1360 && (cam_quirkmatch((caddr_t)&device->inq_data,
1361 (caddr_t)&cur_pattern->data.inq_pat,
1362 1, sizeof(cur_pattern->data.inq_pat),
1363 scsi_static_inquiry_match) == NULL))
1366 device_id_page = (struct scsi_vpd_device_id *)device->device_id;
1367 if (((cur_pattern->flags & DEV_MATCH_DEVID) != 0)
1368 && (device->device_id_len < SVPD_DEVICE_ID_HDR_LEN
1369 || scsi_devid_match((uint8_t *)device_id_page->desc_list,
1370 device->device_id_len
1371 - SVPD_DEVICE_ID_HDR_LEN,
1372 cur_pattern->data.devid_pat.id,
1373 cur_pattern->data.devid_pat.id_len) != 0))
1378 * If we get to this point, the user definitely wants
1379 * information on this device. So tell the caller to copy
1382 retval |= DM_RET_COPY;
1385 * If the return action has been set to descend, then we
1386 * know that we've already seen a peripheral matching
1387 * expression, therefore we need to further descend the tree.
1388 * This won't change by continuing around the loop, so we
1389 * go ahead and return. If we haven't seen a peripheral
1390 * matching expression, we keep going around the loop until
1391 * we exhaust the matching expressions. We'll set the stop
1392 * flag once we fall out of the loop.
1394 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND)
1399 * If the return action hasn't been set to descend yet, that means
1400 * we haven't seen any peripheral matching patterns. So tell the
1401 * caller to stop descending the tree -- the user doesn't want to
1402 * match against lower level tree elements.
1404 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1405 retval |= DM_RET_STOP;
1411 * Match a single peripheral against any number of match patterns.
1413 static dev_match_ret
1414 xptperiphmatch(struct dev_match_pattern *patterns, u_int num_patterns,
1415 struct cam_periph *periph)
1417 dev_match_ret retval;
1421 * If we aren't given something to match against, that's an error.
1424 return(DM_RET_ERROR);
1427 * If there are no match entries, then this peripheral matches no
1430 if ((patterns == NULL) || (num_patterns == 0))
1431 return(DM_RET_STOP | DM_RET_COPY);
1434 * There aren't any nodes below a peripheral node, so there's no
1435 * reason to descend the tree any further.
1437 retval = DM_RET_STOP;
1439 for (i = 0; i < num_patterns; i++) {
1440 struct periph_match_pattern *cur_pattern;
1443 * If the pattern in question isn't for a peripheral, we
1444 * aren't interested.
1446 if (patterns[i].type != DEV_MATCH_PERIPH)
1449 cur_pattern = &patterns[i].pattern.periph_pattern;
1452 * If they want to match on anything, then we will do so.
1454 if (cur_pattern->flags == PERIPH_MATCH_ANY) {
1455 /* set the copy flag */
1456 retval |= DM_RET_COPY;
1459 * We've already set the return action to stop,
1460 * since there are no nodes below peripherals in
1467 * Not sure why someone would do this...
1469 if (cur_pattern->flags == PERIPH_MATCH_NONE)
1472 if (((cur_pattern->flags & PERIPH_MATCH_PATH) != 0)
1473 && (cur_pattern->path_id != periph->path->bus->path_id))
1477 * For the target and lun id's, we have to make sure the
1478 * target and lun pointers aren't NULL. The xpt peripheral
1479 * has a wildcard target and device.
1481 if (((cur_pattern->flags & PERIPH_MATCH_TARGET) != 0)
1482 && ((periph->path->target == NULL)
1483 ||(cur_pattern->target_id != periph->path->target->target_id)))
1486 if (((cur_pattern->flags & PERIPH_MATCH_LUN) != 0)
1487 && ((periph->path->device == NULL)
1488 || (cur_pattern->target_lun != periph->path->device->lun_id)))
1491 if (((cur_pattern->flags & PERIPH_MATCH_UNIT) != 0)
1492 && (cur_pattern->unit_number != periph->unit_number))
1495 if (((cur_pattern->flags & PERIPH_MATCH_NAME) != 0)
1496 && (strncmp(cur_pattern->periph_name, periph->periph_name,
1501 * If we get to this point, the user definitely wants
1502 * information on this peripheral. So tell the caller to
1503 * copy the data out.
1505 retval |= DM_RET_COPY;
1508 * The return action has already been set to stop, since
1509 * peripherals don't have any nodes below them in the EDT.
1515 * If we get to this point, the peripheral that was passed in
1516 * doesn't match any of the patterns.
1522 xptedtbusfunc(struct cam_eb *bus, void *arg)
1524 struct ccb_dev_match *cdm;
1525 struct cam_et *target;
1526 dev_match_ret retval;
1528 cdm = (struct ccb_dev_match *)arg;
1531 * If our position is for something deeper in the tree, that means
1532 * that we've already seen this node. So, we keep going down.
1534 if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1535 && (cdm->pos.cookie.bus == bus)
1536 && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1537 && (cdm->pos.cookie.target != NULL))
1538 retval = DM_RET_DESCEND;
1540 retval = xptbusmatch(cdm->patterns, cdm->num_patterns, bus);
1543 * If we got an error, bail out of the search.
1545 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1546 cdm->status = CAM_DEV_MATCH_ERROR;
1551 * If the copy flag is set, copy this bus out.
1553 if (retval & DM_RET_COPY) {
1556 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1557 sizeof(struct dev_match_result));
1560 * If we don't have enough space to put in another
1561 * match result, save our position and tell the
1562 * user there are more devices to check.
1564 if (spaceleft < sizeof(struct dev_match_result)) {
1565 bzero(&cdm->pos, sizeof(cdm->pos));
1566 cdm->pos.position_type =
1567 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS;
1569 cdm->pos.cookie.bus = bus;
1570 cdm->pos.generations[CAM_BUS_GENERATION]=
1571 xsoftc.bus_generation;
1572 cdm->status = CAM_DEV_MATCH_MORE;
1575 j = cdm->num_matches;
1577 cdm->matches[j].type = DEV_MATCH_BUS;
1578 cdm->matches[j].result.bus_result.path_id = bus->path_id;
1579 cdm->matches[j].result.bus_result.bus_id = bus->sim->bus_id;
1580 cdm->matches[j].result.bus_result.unit_number =
1581 bus->sim->unit_number;
1582 strncpy(cdm->matches[j].result.bus_result.dev_name,
1583 bus->sim->sim_name, DEV_IDLEN);
1587 * If the user is only interested in busses, there's no
1588 * reason to descend to the next level in the tree.
1590 if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP)
1594 * If there is a target generation recorded, check it to
1595 * make sure the target list hasn't changed.
1597 mtx_lock(&bus->eb_mtx);
1598 if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1599 && (cdm->pos.cookie.bus == bus)
1600 && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1601 && (cdm->pos.cookie.target != NULL)) {
1602 if ((cdm->pos.generations[CAM_TARGET_GENERATION] !=
1604 mtx_unlock(&bus->eb_mtx);
1605 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1608 target = (struct cam_et *)cdm->pos.cookie.target;
1612 mtx_unlock(&bus->eb_mtx);
1614 return (xpttargettraverse(bus, target, xptedttargetfunc, arg));
1618 xptedttargetfunc(struct cam_et *target, void *arg)
1620 struct ccb_dev_match *cdm;
1622 struct cam_ed *device;
1624 cdm = (struct ccb_dev_match *)arg;
1628 * If there is a device list generation recorded, check it to
1629 * make sure the device list hasn't changed.
1631 mtx_lock(&bus->eb_mtx);
1632 if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1633 && (cdm->pos.cookie.bus == bus)
1634 && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1635 && (cdm->pos.cookie.target == target)
1636 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1637 && (cdm->pos.cookie.device != NULL)) {
1638 if (cdm->pos.generations[CAM_DEV_GENERATION] !=
1639 target->generation) {
1640 mtx_unlock(&bus->eb_mtx);
1641 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1644 device = (struct cam_ed *)cdm->pos.cookie.device;
1648 mtx_unlock(&bus->eb_mtx);
1650 return (xptdevicetraverse(target, device, xptedtdevicefunc, arg));
1654 xptedtdevicefunc(struct cam_ed *device, void *arg)
1657 struct cam_periph *periph;
1658 struct ccb_dev_match *cdm;
1659 dev_match_ret retval;
1661 cdm = (struct ccb_dev_match *)arg;
1662 bus = device->target->bus;
1665 * If our position is for something deeper in the tree, that means
1666 * that we've already seen this node. So, we keep going down.
1668 if ((cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1669 && (cdm->pos.cookie.device == device)
1670 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
1671 && (cdm->pos.cookie.periph != NULL))
1672 retval = DM_RET_DESCEND;
1674 retval = xptdevicematch(cdm->patterns, cdm->num_patterns,
1677 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1678 cdm->status = CAM_DEV_MATCH_ERROR;
1683 * If the copy flag is set, copy this device out.
1685 if (retval & DM_RET_COPY) {
1688 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1689 sizeof(struct dev_match_result));
1692 * If we don't have enough space to put in another
1693 * match result, save our position and tell the
1694 * user there are more devices to check.
1696 if (spaceleft < sizeof(struct dev_match_result)) {
1697 bzero(&cdm->pos, sizeof(cdm->pos));
1698 cdm->pos.position_type =
1699 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS |
1700 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE;
1702 cdm->pos.cookie.bus = device->target->bus;
1703 cdm->pos.generations[CAM_BUS_GENERATION]=
1704 xsoftc.bus_generation;
1705 cdm->pos.cookie.target = device->target;
1706 cdm->pos.generations[CAM_TARGET_GENERATION] =
1707 device->target->bus->generation;
1708 cdm->pos.cookie.device = device;
1709 cdm->pos.generations[CAM_DEV_GENERATION] =
1710 device->target->generation;
1711 cdm->status = CAM_DEV_MATCH_MORE;
1714 j = cdm->num_matches;
1716 cdm->matches[j].type = DEV_MATCH_DEVICE;
1717 cdm->matches[j].result.device_result.path_id =
1718 device->target->bus->path_id;
1719 cdm->matches[j].result.device_result.target_id =
1720 device->target->target_id;
1721 cdm->matches[j].result.device_result.target_lun =
1723 cdm->matches[j].result.device_result.protocol =
1725 bcopy(&device->inq_data,
1726 &cdm->matches[j].result.device_result.inq_data,
1727 sizeof(struct scsi_inquiry_data));
1728 bcopy(&device->ident_data,
1729 &cdm->matches[j].result.device_result.ident_data,
1730 sizeof(struct ata_params));
1732 /* Let the user know whether this device is unconfigured */
1733 if (device->flags & CAM_DEV_UNCONFIGURED)
1734 cdm->matches[j].result.device_result.flags =
1735 DEV_RESULT_UNCONFIGURED;
1737 cdm->matches[j].result.device_result.flags =
1742 * If the user isn't interested in peripherals, don't descend
1743 * the tree any further.
1745 if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP)
1749 * If there is a peripheral list generation recorded, make sure
1750 * it hasn't changed.
1753 mtx_lock(&bus->eb_mtx);
1754 if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1755 && (cdm->pos.cookie.bus == bus)
1756 && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1757 && (cdm->pos.cookie.target == device->target)
1758 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1759 && (cdm->pos.cookie.device == device)
1760 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
1761 && (cdm->pos.cookie.periph != NULL)) {
1762 if (cdm->pos.generations[CAM_PERIPH_GENERATION] !=
1763 device->generation) {
1764 mtx_unlock(&bus->eb_mtx);
1766 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1769 periph = (struct cam_periph *)cdm->pos.cookie.periph;
1773 mtx_unlock(&bus->eb_mtx);
1776 return (xptperiphtraverse(device, periph, xptedtperiphfunc, arg));
1780 xptedtperiphfunc(struct cam_periph *periph, void *arg)
1782 struct ccb_dev_match *cdm;
1783 dev_match_ret retval;
1785 cdm = (struct ccb_dev_match *)arg;
1787 retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph);
1789 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1790 cdm->status = CAM_DEV_MATCH_ERROR;
1795 * If the copy flag is set, copy this peripheral out.
1797 if (retval & DM_RET_COPY) {
1800 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1801 sizeof(struct dev_match_result));
1804 * If we don't have enough space to put in another
1805 * match result, save our position and tell the
1806 * user there are more devices to check.
1808 if (spaceleft < sizeof(struct dev_match_result)) {
1809 bzero(&cdm->pos, sizeof(cdm->pos));
1810 cdm->pos.position_type =
1811 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS |
1812 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE |
1815 cdm->pos.cookie.bus = periph->path->bus;
1816 cdm->pos.generations[CAM_BUS_GENERATION]=
1817 xsoftc.bus_generation;
1818 cdm->pos.cookie.target = periph->path->target;
1819 cdm->pos.generations[CAM_TARGET_GENERATION] =
1820 periph->path->bus->generation;
1821 cdm->pos.cookie.device = periph->path->device;
1822 cdm->pos.generations[CAM_DEV_GENERATION] =
1823 periph->path->target->generation;
1824 cdm->pos.cookie.periph = periph;
1825 cdm->pos.generations[CAM_PERIPH_GENERATION] =
1826 periph->path->device->generation;
1827 cdm->status = CAM_DEV_MATCH_MORE;
1831 j = cdm->num_matches;
1833 cdm->matches[j].type = DEV_MATCH_PERIPH;
1834 cdm->matches[j].result.periph_result.path_id =
1835 periph->path->bus->path_id;
1836 cdm->matches[j].result.periph_result.target_id =
1837 periph->path->target->target_id;
1838 cdm->matches[j].result.periph_result.target_lun =
1839 periph->path->device->lun_id;
1840 cdm->matches[j].result.periph_result.unit_number =
1841 periph->unit_number;
1842 strncpy(cdm->matches[j].result.periph_result.periph_name,
1843 periph->periph_name, DEV_IDLEN);
1850 xptedtmatch(struct ccb_dev_match *cdm)
1855 cdm->num_matches = 0;
1858 * Check the bus list generation. If it has changed, the user
1859 * needs to reset everything and start over.
1862 if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1863 && (cdm->pos.cookie.bus != NULL)) {
1864 if (cdm->pos.generations[CAM_BUS_GENERATION] !=
1865 xsoftc.bus_generation) {
1867 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1870 bus = (struct cam_eb *)cdm->pos.cookie.bus;
1876 ret = xptbustraverse(bus, xptedtbusfunc, cdm);
1879 * If we get back 0, that means that we had to stop before fully
1880 * traversing the EDT. It also means that one of the subroutines
1881 * has set the status field to the proper value. If we get back 1,
1882 * we've fully traversed the EDT and copied out any matching entries.
1885 cdm->status = CAM_DEV_MATCH_LAST;
1891 xptplistpdrvfunc(struct periph_driver **pdrv, void *arg)
1893 struct cam_periph *periph;
1894 struct ccb_dev_match *cdm;
1896 cdm = (struct ccb_dev_match *)arg;
1899 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
1900 && (cdm->pos.cookie.pdrv == pdrv)
1901 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
1902 && (cdm->pos.cookie.periph != NULL)) {
1903 if (cdm->pos.generations[CAM_PERIPH_GENERATION] !=
1904 (*pdrv)->generation) {
1906 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1909 periph = (struct cam_periph *)cdm->pos.cookie.periph;
1915 return (xptpdperiphtraverse(pdrv, periph, xptplistperiphfunc, arg));
1919 xptplistperiphfunc(struct cam_periph *periph, void *arg)
1921 struct ccb_dev_match *cdm;
1922 dev_match_ret retval;
1924 cdm = (struct ccb_dev_match *)arg;
1926 retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph);
1928 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1929 cdm->status = CAM_DEV_MATCH_ERROR;
1934 * If the copy flag is set, copy this peripheral out.
1936 if (retval & DM_RET_COPY) {
1939 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1940 sizeof(struct dev_match_result));
1943 * If we don't have enough space to put in another
1944 * match result, save our position and tell the
1945 * user there are more devices to check.
1947 if (spaceleft < sizeof(struct dev_match_result)) {
1948 struct periph_driver **pdrv;
1951 bzero(&cdm->pos, sizeof(cdm->pos));
1952 cdm->pos.position_type =
1953 CAM_DEV_POS_PDRV | CAM_DEV_POS_PDPTR |
1957 * This may look a bit non-sensical, but it is
1958 * actually quite logical. There are very few
1959 * peripheral drivers, and bloating every peripheral
1960 * structure with a pointer back to its parent
1961 * peripheral driver linker set entry would cost
1962 * more in the long run than doing this quick lookup.
1964 for (pdrv = periph_drivers; *pdrv != NULL; pdrv++) {
1965 if (strcmp((*pdrv)->driver_name,
1966 periph->periph_name) == 0)
1970 if (*pdrv == NULL) {
1971 cdm->status = CAM_DEV_MATCH_ERROR;
1975 cdm->pos.cookie.pdrv = pdrv;
1977 * The periph generation slot does double duty, as
1978 * does the periph pointer slot. They are used for
1979 * both edt and pdrv lookups and positioning.
1981 cdm->pos.cookie.periph = periph;
1982 cdm->pos.generations[CAM_PERIPH_GENERATION] =
1983 (*pdrv)->generation;
1984 cdm->status = CAM_DEV_MATCH_MORE;
1988 j = cdm->num_matches;
1990 cdm->matches[j].type = DEV_MATCH_PERIPH;
1991 cdm->matches[j].result.periph_result.path_id =
1992 periph->path->bus->path_id;
1995 * The transport layer peripheral doesn't have a target or
1998 if (periph->path->target)
1999 cdm->matches[j].result.periph_result.target_id =
2000 periph->path->target->target_id;
2002 cdm->matches[j].result.periph_result.target_id =
2003 CAM_TARGET_WILDCARD;
2005 if (periph->path->device)
2006 cdm->matches[j].result.periph_result.target_lun =
2007 periph->path->device->lun_id;
2009 cdm->matches[j].result.periph_result.target_lun =
2012 cdm->matches[j].result.periph_result.unit_number =
2013 periph->unit_number;
2014 strncpy(cdm->matches[j].result.periph_result.periph_name,
2015 periph->periph_name, DEV_IDLEN);
2022 xptperiphlistmatch(struct ccb_dev_match *cdm)
2026 cdm->num_matches = 0;
2029 * At this point in the edt traversal function, we check the bus
2030 * list generation to make sure that no busses have been added or
2031 * removed since the user last sent a XPT_DEV_MATCH ccb through.
2032 * For the peripheral driver list traversal function, however, we
2033 * don't have to worry about new peripheral driver types coming or
2034 * going; they're in a linker set, and therefore can't change
2035 * without a recompile.
2038 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
2039 && (cdm->pos.cookie.pdrv != NULL))
2040 ret = xptpdrvtraverse(
2041 (struct periph_driver **)cdm->pos.cookie.pdrv,
2042 xptplistpdrvfunc, cdm);
2044 ret = xptpdrvtraverse(NULL, xptplistpdrvfunc, cdm);
2047 * If we get back 0, that means that we had to stop before fully
2048 * traversing the peripheral driver tree. It also means that one of
2049 * the subroutines has set the status field to the proper value. If
2050 * we get back 1, we've fully traversed the EDT and copied out any
2054 cdm->status = CAM_DEV_MATCH_LAST;
2060 xptbustraverse(struct cam_eb *start_bus, xpt_busfunc_t *tr_func, void *arg)
2062 struct cam_eb *bus, *next_bus;
2070 bus = TAILQ_FIRST(&xsoftc.xpt_busses);
2078 for (; bus != NULL; bus = next_bus) {
2079 retval = tr_func(bus, arg);
2081 xpt_release_bus(bus);
2085 next_bus = TAILQ_NEXT(bus, links);
2087 next_bus->refcount++;
2089 xpt_release_bus(bus);
2095 xpttargettraverse(struct cam_eb *bus, struct cam_et *start_target,
2096 xpt_targetfunc_t *tr_func, void *arg)
2098 struct cam_et *target, *next_target;
2103 target = start_target;
2105 mtx_lock(&bus->eb_mtx);
2106 target = TAILQ_FIRST(&bus->et_entries);
2107 if (target == NULL) {
2108 mtx_unlock(&bus->eb_mtx);
2112 mtx_unlock(&bus->eb_mtx);
2114 for (; target != NULL; target = next_target) {
2115 retval = tr_func(target, arg);
2117 xpt_release_target(target);
2120 mtx_lock(&bus->eb_mtx);
2121 next_target = TAILQ_NEXT(target, links);
2123 next_target->refcount++;
2124 mtx_unlock(&bus->eb_mtx);
2125 xpt_release_target(target);
2131 xptdevicetraverse(struct cam_et *target, struct cam_ed *start_device,
2132 xpt_devicefunc_t *tr_func, void *arg)
2135 struct cam_ed *device, *next_device;
2141 device = start_device;
2143 mtx_lock(&bus->eb_mtx);
2144 device = TAILQ_FIRST(&target->ed_entries);
2145 if (device == NULL) {
2146 mtx_unlock(&bus->eb_mtx);
2150 mtx_unlock(&bus->eb_mtx);
2152 for (; device != NULL; device = next_device) {
2153 mtx_lock(&device->device_mtx);
2154 retval = tr_func(device, arg);
2155 mtx_unlock(&device->device_mtx);
2157 xpt_release_device(device);
2160 mtx_lock(&bus->eb_mtx);
2161 next_device = TAILQ_NEXT(device, links);
2163 next_device->refcount++;
2164 mtx_unlock(&bus->eb_mtx);
2165 xpt_release_device(device);
2171 xptperiphtraverse(struct cam_ed *device, struct cam_periph *start_periph,
2172 xpt_periphfunc_t *tr_func, void *arg)
2175 struct cam_periph *periph, *next_periph;
2180 bus = device->target->bus;
2182 periph = start_periph;
2185 mtx_lock(&bus->eb_mtx);
2186 periph = SLIST_FIRST(&device->periphs);
2187 while (periph != NULL && (periph->flags & CAM_PERIPH_FREE) != 0)
2188 periph = SLIST_NEXT(periph, periph_links);
2189 if (periph == NULL) {
2190 mtx_unlock(&bus->eb_mtx);
2195 mtx_unlock(&bus->eb_mtx);
2198 for (; periph != NULL; periph = next_periph) {
2199 retval = tr_func(periph, arg);
2201 cam_periph_release_locked(periph);
2205 mtx_lock(&bus->eb_mtx);
2206 next_periph = SLIST_NEXT(periph, periph_links);
2207 while (next_periph != NULL &&
2208 (next_periph->flags & CAM_PERIPH_FREE) != 0)
2209 next_periph = SLIST_NEXT(next_periph, periph_links);
2211 next_periph->refcount++;
2212 mtx_unlock(&bus->eb_mtx);
2214 cam_periph_release_locked(periph);
2220 xptpdrvtraverse(struct periph_driver **start_pdrv,
2221 xpt_pdrvfunc_t *tr_func, void *arg)
2223 struct periph_driver **pdrv;
2229 * We don't traverse the peripheral driver list like we do the
2230 * other lists, because it is a linker set, and therefore cannot be
2231 * changed during runtime. If the peripheral driver list is ever
2232 * re-done to be something other than a linker set (i.e. it can
2233 * change while the system is running), the list traversal should
2234 * be modified to work like the other traversal functions.
2236 for (pdrv = (start_pdrv ? start_pdrv : periph_drivers);
2237 *pdrv != NULL; pdrv++) {
2238 retval = tr_func(pdrv, arg);
2248 xptpdperiphtraverse(struct periph_driver **pdrv,
2249 struct cam_periph *start_periph,
2250 xpt_periphfunc_t *tr_func, void *arg)
2252 struct cam_periph *periph, *next_periph;
2258 periph = start_periph;
2261 periph = TAILQ_FIRST(&(*pdrv)->units);
2262 while (periph != NULL && (periph->flags & CAM_PERIPH_FREE) != 0)
2263 periph = TAILQ_NEXT(periph, unit_links);
2264 if (periph == NULL) {
2271 for (; periph != NULL; periph = next_periph) {
2272 cam_periph_lock(periph);
2273 retval = tr_func(periph, arg);
2274 cam_periph_unlock(periph);
2276 cam_periph_release(periph);
2280 next_periph = TAILQ_NEXT(periph, unit_links);
2281 while (next_periph != NULL &&
2282 (next_periph->flags & CAM_PERIPH_FREE) != 0)
2283 next_periph = TAILQ_NEXT(next_periph, unit_links);
2285 next_periph->refcount++;
2287 cam_periph_release(periph);
2293 xptdefbusfunc(struct cam_eb *bus, void *arg)
2295 struct xpt_traverse_config *tr_config;
2297 tr_config = (struct xpt_traverse_config *)arg;
2299 if (tr_config->depth == XPT_DEPTH_BUS) {
2300 xpt_busfunc_t *tr_func;
2302 tr_func = (xpt_busfunc_t *)tr_config->tr_func;
2304 return(tr_func(bus, tr_config->tr_arg));
2306 return(xpttargettraverse(bus, NULL, xptdeftargetfunc, arg));
2310 xptdeftargetfunc(struct cam_et *target, void *arg)
2312 struct xpt_traverse_config *tr_config;
2314 tr_config = (struct xpt_traverse_config *)arg;
2316 if (tr_config->depth == XPT_DEPTH_TARGET) {
2317 xpt_targetfunc_t *tr_func;
2319 tr_func = (xpt_targetfunc_t *)tr_config->tr_func;
2321 return(tr_func(target, tr_config->tr_arg));
2323 return(xptdevicetraverse(target, NULL, xptdefdevicefunc, arg));
2327 xptdefdevicefunc(struct cam_ed *device, void *arg)
2329 struct xpt_traverse_config *tr_config;
2331 tr_config = (struct xpt_traverse_config *)arg;
2333 if (tr_config->depth == XPT_DEPTH_DEVICE) {
2334 xpt_devicefunc_t *tr_func;
2336 tr_func = (xpt_devicefunc_t *)tr_config->tr_func;
2338 return(tr_func(device, tr_config->tr_arg));
2340 return(xptperiphtraverse(device, NULL, xptdefperiphfunc, arg));
2344 xptdefperiphfunc(struct cam_periph *periph, void *arg)
2346 struct xpt_traverse_config *tr_config;
2347 xpt_periphfunc_t *tr_func;
2349 tr_config = (struct xpt_traverse_config *)arg;
2351 tr_func = (xpt_periphfunc_t *)tr_config->tr_func;
2354 * Unlike the other default functions, we don't check for depth
2355 * here. The peripheral driver level is the last level in the EDT,
2356 * so if we're here, we should execute the function in question.
2358 return(tr_func(periph, tr_config->tr_arg));
2362 * Execute the given function for every bus in the EDT.
2365 xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg)
2367 struct xpt_traverse_config tr_config;
2369 tr_config.depth = XPT_DEPTH_BUS;
2370 tr_config.tr_func = tr_func;
2371 tr_config.tr_arg = arg;
2373 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2377 * Execute the given function for every device in the EDT.
2380 xpt_for_all_devices(xpt_devicefunc_t *tr_func, void *arg)
2382 struct xpt_traverse_config tr_config;
2384 tr_config.depth = XPT_DEPTH_DEVICE;
2385 tr_config.tr_func = tr_func;
2386 tr_config.tr_arg = arg;
2388 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2392 xptsetasyncfunc(struct cam_ed *device, void *arg)
2394 struct cam_path path;
2395 struct ccb_getdev cgd;
2396 struct ccb_setasync *csa = (struct ccb_setasync *)arg;
2399 * Don't report unconfigured devices (Wildcard devs,
2400 * devices only for target mode, device instances
2401 * that have been invalidated but are waiting for
2402 * their last reference count to be released).
2404 if ((device->flags & CAM_DEV_UNCONFIGURED) != 0)
2407 xpt_compile_path(&path,
2409 device->target->bus->path_id,
2410 device->target->target_id,
2412 xpt_setup_ccb(&cgd.ccb_h, &path, CAM_PRIORITY_NORMAL);
2413 cgd.ccb_h.func_code = XPT_GDEV_TYPE;
2414 xpt_action((union ccb *)&cgd);
2415 csa->callback(csa->callback_arg,
2418 xpt_release_path(&path);
2424 xptsetasyncbusfunc(struct cam_eb *bus, void *arg)
2426 struct cam_path path;
2427 struct ccb_pathinq cpi;
2428 struct ccb_setasync *csa = (struct ccb_setasync *)arg;
2430 xpt_compile_path(&path, /*periph*/NULL,
2432 CAM_TARGET_WILDCARD,
2434 xpt_path_lock(&path);
2435 xpt_setup_ccb(&cpi.ccb_h, &path, CAM_PRIORITY_NORMAL);
2436 cpi.ccb_h.func_code = XPT_PATH_INQ;
2437 xpt_action((union ccb *)&cpi);
2438 csa->callback(csa->callback_arg,
2441 xpt_path_unlock(&path);
2442 xpt_release_path(&path);
2448 xpt_action(union ccb *start_ccb)
2451 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_action\n"));
2453 start_ccb->ccb_h.status = CAM_REQ_INPROG;
2454 (*(start_ccb->ccb_h.path->bus->xport->action))(start_ccb);
2458 xpt_action_default(union ccb *start_ccb)
2460 struct cam_path *path;
2461 struct cam_sim *sim;
2464 path = start_ccb->ccb_h.path;
2465 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_action_default\n"));
2467 switch (start_ccb->ccb_h.func_code) {
2470 struct cam_ed *device;
2473 * For the sake of compatibility with SCSI-1
2474 * devices that may not understand the identify
2475 * message, we include lun information in the
2476 * second byte of all commands. SCSI-1 specifies
2477 * that luns are a 3 bit value and reserves only 3
2478 * bits for lun information in the CDB. Later
2479 * revisions of the SCSI spec allow for more than 8
2480 * luns, but have deprecated lun information in the
2481 * CDB. So, if the lun won't fit, we must omit.
2483 * Also be aware that during initial probing for devices,
2484 * the inquiry information is unknown but initialized to 0.
2485 * This means that this code will be exercised while probing
2486 * devices with an ANSI revision greater than 2.
2488 device = path->device;
2489 if (device->protocol_version <= SCSI_REV_2
2490 && start_ccb->ccb_h.target_lun < 8
2491 && (start_ccb->ccb_h.flags & CAM_CDB_POINTER) == 0) {
2493 start_ccb->csio.cdb_io.cdb_bytes[1] |=
2494 start_ccb->ccb_h.target_lun << 5;
2496 start_ccb->csio.scsi_status = SCSI_STATUS_OK;
2500 case XPT_CONT_TARGET_IO:
2501 start_ccb->csio.sense_resid = 0;
2502 start_ccb->csio.resid = 0;
2505 if (start_ccb->ccb_h.func_code == XPT_ATA_IO)
2506 start_ccb->ataio.resid = 0;
2512 struct cam_devq *devq;
2514 devq = path->bus->sim->devq;
2515 mtx_lock(&devq->send_mtx);
2516 cam_ccbq_insert_ccb(&path->device->ccbq, start_ccb);
2517 if (xpt_schedule_devq(devq, path->device) != 0)
2519 mtx_unlock(&devq->send_mtx);
2522 case XPT_CALC_GEOMETRY:
2523 /* Filter out garbage */
2524 if (start_ccb->ccg.block_size == 0
2525 || start_ccb->ccg.volume_size == 0) {
2526 start_ccb->ccg.cylinders = 0;
2527 start_ccb->ccg.heads = 0;
2528 start_ccb->ccg.secs_per_track = 0;
2529 start_ccb->ccb_h.status = CAM_REQ_CMP;
2532 #if defined(PC98) || defined(__sparc64__)
2534 * In a PC-98 system, geometry translation depens on
2535 * the "real" device geometry obtained from mode page 4.
2536 * SCSI geometry translation is performed in the
2537 * initialization routine of the SCSI BIOS and the result
2538 * stored in host memory. If the translation is available
2539 * in host memory, use it. If not, rely on the default
2540 * translation the device driver performs.
2541 * For sparc64, we may need adjust the geometry of large
2542 * disks in order to fit the limitations of the 16-bit
2543 * fields of the VTOC8 disk label.
2545 if (scsi_da_bios_params(&start_ccb->ccg) != 0) {
2546 start_ccb->ccb_h.status = CAM_REQ_CMP;
2553 union ccb* abort_ccb;
2555 abort_ccb = start_ccb->cab.abort_ccb;
2556 if (XPT_FC_IS_DEV_QUEUED(abort_ccb)) {
2558 if (abort_ccb->ccb_h.pinfo.index >= 0) {
2559 struct cam_ccbq *ccbq;
2560 struct cam_ed *device;
2562 device = abort_ccb->ccb_h.path->device;
2563 ccbq = &device->ccbq;
2564 cam_ccbq_remove_ccb(ccbq, abort_ccb);
2565 abort_ccb->ccb_h.status =
2566 CAM_REQ_ABORTED|CAM_DEV_QFRZN;
2567 xpt_freeze_devq(abort_ccb->ccb_h.path, 1);
2568 xpt_done(abort_ccb);
2569 start_ccb->ccb_h.status = CAM_REQ_CMP;
2572 if (abort_ccb->ccb_h.pinfo.index == CAM_UNQUEUED_INDEX
2573 && (abort_ccb->ccb_h.status & CAM_SIM_QUEUED) == 0) {
2575 * We've caught this ccb en route to
2576 * the SIM. Flag it for abort and the
2577 * SIM will do so just before starting
2578 * real work on the CCB.
2580 abort_ccb->ccb_h.status =
2581 CAM_REQ_ABORTED|CAM_DEV_QFRZN;
2582 xpt_freeze_devq(abort_ccb->ccb_h.path, 1);
2583 start_ccb->ccb_h.status = CAM_REQ_CMP;
2587 if (XPT_FC_IS_QUEUED(abort_ccb)
2588 && (abort_ccb->ccb_h.pinfo.index == CAM_DONEQ_INDEX)) {
2590 * It's already completed but waiting
2591 * for our SWI to get to it.
2593 start_ccb->ccb_h.status = CAM_UA_ABORT;
2597 * If we weren't able to take care of the abort request
2598 * in the XPT, pass the request down to the SIM for processing.
2602 case XPT_ACCEPT_TARGET_IO:
2604 case XPT_IMMED_NOTIFY:
2605 case XPT_NOTIFY_ACK:
2607 case XPT_IMMEDIATE_NOTIFY:
2608 case XPT_NOTIFY_ACKNOWLEDGE:
2609 case XPT_GET_SIM_KNOB:
2610 case XPT_SET_SIM_KNOB:
2611 case XPT_GET_TRAN_SETTINGS:
2612 case XPT_SET_TRAN_SETTINGS:
2615 sim = path->bus->sim;
2616 lock = (mtx_owned(sim->mtx) == 0);
2619 (*(sim->sim_action))(sim, start_ccb);
2621 CAM_SIM_UNLOCK(sim);
2623 case XPT_PATH_STATS:
2624 start_ccb->cpis.last_reset = path->bus->last_reset;
2625 start_ccb->ccb_h.status = CAM_REQ_CMP;
2632 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) {
2633 start_ccb->ccb_h.status = CAM_DEV_NOT_THERE;
2635 struct ccb_getdev *cgd;
2637 cgd = &start_ccb->cgd;
2638 cgd->protocol = dev->protocol;
2639 cgd->inq_data = dev->inq_data;
2640 cgd->ident_data = dev->ident_data;
2641 cgd->inq_flags = dev->inq_flags;
2642 cgd->ccb_h.status = CAM_REQ_CMP;
2643 cgd->serial_num_len = dev->serial_num_len;
2644 if ((dev->serial_num_len > 0)
2645 && (dev->serial_num != NULL))
2646 bcopy(dev->serial_num, cgd->serial_num,
2647 dev->serial_num_len);
2651 case XPT_GDEV_STATS:
2656 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) {
2657 start_ccb->ccb_h.status = CAM_DEV_NOT_THERE;
2659 struct ccb_getdevstats *cgds;
2662 struct cam_devq *devq;
2664 cgds = &start_ccb->cgds;
2667 devq = bus->sim->devq;
2668 mtx_lock(&devq->send_mtx);
2669 cgds->dev_openings = dev->ccbq.dev_openings;
2670 cgds->dev_active = dev->ccbq.dev_active;
2671 cgds->allocated = dev->ccbq.allocated;
2672 cgds->queued = cam_ccbq_pending_ccb_count(&dev->ccbq);
2673 cgds->held = cgds->allocated - cgds->dev_active -
2675 cgds->last_reset = tar->last_reset;
2676 cgds->maxtags = dev->maxtags;
2677 cgds->mintags = dev->mintags;
2678 if (timevalcmp(&tar->last_reset, &bus->last_reset, <))
2679 cgds->last_reset = bus->last_reset;
2680 mtx_unlock(&devq->send_mtx);
2681 cgds->ccb_h.status = CAM_REQ_CMP;
2687 struct cam_periph *nperiph;
2688 struct periph_list *periph_head;
2689 struct ccb_getdevlist *cgdl;
2691 struct cam_ed *device;
2698 * Don't want anyone mucking with our data.
2700 device = path->device;
2701 periph_head = &device->periphs;
2702 cgdl = &start_ccb->cgdl;
2705 * Check and see if the list has changed since the user
2706 * last requested a list member. If so, tell them that the
2707 * list has changed, and therefore they need to start over
2708 * from the beginning.
2710 if ((cgdl->index != 0) &&
2711 (cgdl->generation != device->generation)) {
2712 cgdl->status = CAM_GDEVLIST_LIST_CHANGED;
2717 * Traverse the list of peripherals and attempt to find
2718 * the requested peripheral.
2720 for (nperiph = SLIST_FIRST(periph_head), i = 0;
2721 (nperiph != NULL) && (i <= cgdl->index);
2722 nperiph = SLIST_NEXT(nperiph, periph_links), i++) {
2723 if (i == cgdl->index) {
2724 strncpy(cgdl->periph_name,
2725 nperiph->periph_name,
2727 cgdl->unit_number = nperiph->unit_number;
2732 cgdl->status = CAM_GDEVLIST_ERROR;
2736 if (nperiph == NULL)
2737 cgdl->status = CAM_GDEVLIST_LAST_DEVICE;
2739 cgdl->status = CAM_GDEVLIST_MORE_DEVS;
2742 cgdl->generation = device->generation;
2744 cgdl->ccb_h.status = CAM_REQ_CMP;
2749 dev_pos_type position_type;
2750 struct ccb_dev_match *cdm;
2752 cdm = &start_ccb->cdm;
2755 * There are two ways of getting at information in the EDT.
2756 * The first way is via the primary EDT tree. It starts
2757 * with a list of busses, then a list of targets on a bus,
2758 * then devices/luns on a target, and then peripherals on a
2759 * device/lun. The "other" way is by the peripheral driver
2760 * lists. The peripheral driver lists are organized by
2761 * peripheral driver. (obviously) So it makes sense to
2762 * use the peripheral driver list if the user is looking
2763 * for something like "da1", or all "da" devices. If the
2764 * user is looking for something on a particular bus/target
2765 * or lun, it's generally better to go through the EDT tree.
2768 if (cdm->pos.position_type != CAM_DEV_POS_NONE)
2769 position_type = cdm->pos.position_type;
2773 position_type = CAM_DEV_POS_NONE;
2775 for (i = 0; i < cdm->num_patterns; i++) {
2776 if ((cdm->patterns[i].type == DEV_MATCH_BUS)
2777 ||(cdm->patterns[i].type == DEV_MATCH_DEVICE)){
2778 position_type = CAM_DEV_POS_EDT;
2783 if (cdm->num_patterns == 0)
2784 position_type = CAM_DEV_POS_EDT;
2785 else if (position_type == CAM_DEV_POS_NONE)
2786 position_type = CAM_DEV_POS_PDRV;
2789 switch(position_type & CAM_DEV_POS_TYPEMASK) {
2790 case CAM_DEV_POS_EDT:
2793 case CAM_DEV_POS_PDRV:
2794 xptperiphlistmatch(cdm);
2797 cdm->status = CAM_DEV_MATCH_ERROR;
2801 if (cdm->status == CAM_DEV_MATCH_ERROR)
2802 start_ccb->ccb_h.status = CAM_REQ_CMP_ERR;
2804 start_ccb->ccb_h.status = CAM_REQ_CMP;
2810 struct ccb_setasync *csa;
2811 struct async_node *cur_entry;
2812 struct async_list *async_head;
2815 csa = &start_ccb->csa;
2816 added = csa->event_enable;
2817 async_head = &path->device->asyncs;
2820 * If there is already an entry for us, simply
2823 cur_entry = SLIST_FIRST(async_head);
2824 while (cur_entry != NULL) {
2825 if ((cur_entry->callback_arg == csa->callback_arg)
2826 && (cur_entry->callback == csa->callback))
2828 cur_entry = SLIST_NEXT(cur_entry, links);
2831 if (cur_entry != NULL) {
2833 * If the request has no flags set,
2836 added &= ~cur_entry->event_enable;
2837 if (csa->event_enable == 0) {
2838 SLIST_REMOVE(async_head, cur_entry,
2840 xpt_release_device(path->device);
2841 free(cur_entry, M_CAMXPT);
2843 cur_entry->event_enable = csa->event_enable;
2845 csa->event_enable = added;
2847 cur_entry = malloc(sizeof(*cur_entry), M_CAMXPT,
2849 if (cur_entry == NULL) {
2850 csa->ccb_h.status = CAM_RESRC_UNAVAIL;
2853 cur_entry->event_enable = csa->event_enable;
2854 cur_entry->event_lock =
2855 mtx_owned(path->bus->sim->mtx) ? 1 : 0;
2856 cur_entry->callback_arg = csa->callback_arg;
2857 cur_entry->callback = csa->callback;
2858 SLIST_INSERT_HEAD(async_head, cur_entry, links);
2859 xpt_acquire_device(path->device);
2861 start_ccb->ccb_h.status = CAM_REQ_CMP;
2866 struct ccb_relsim *crs;
2869 crs = &start_ccb->crs;
2873 crs->ccb_h.status = CAM_DEV_NOT_THERE;
2877 if ((crs->release_flags & RELSIM_ADJUST_OPENINGS) != 0) {
2879 /* Don't ever go below one opening */
2880 if (crs->openings > 0) {
2881 xpt_dev_ccbq_resize(path, crs->openings);
2884 "number of openings is now %d\n",
2890 mtx_lock(&dev->sim->devq->send_mtx);
2891 if ((crs->release_flags & RELSIM_RELEASE_AFTER_TIMEOUT) != 0) {
2893 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) {
2896 * Just extend the old timeout and decrement
2897 * the freeze count so that a single timeout
2898 * is sufficient for releasing the queue.
2900 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
2901 callout_stop(&dev->callout);
2904 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
2907 callout_reset_sbt(&dev->callout,
2908 SBT_1MS * crs->release_timeout, 0,
2909 xpt_release_devq_timeout, dev, 0);
2911 dev->flags |= CAM_DEV_REL_TIMEOUT_PENDING;
2915 if ((crs->release_flags & RELSIM_RELEASE_AFTER_CMDCMPLT) != 0) {
2917 if ((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0) {
2919 * Decrement the freeze count so that a single
2920 * completion is still sufficient to unfreeze
2923 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
2926 dev->flags |= CAM_DEV_REL_ON_COMPLETE;
2927 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
2931 if ((crs->release_flags & RELSIM_RELEASE_AFTER_QEMPTY) != 0) {
2933 if ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0
2934 || (dev->ccbq.dev_active == 0)) {
2936 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
2939 dev->flags |= CAM_DEV_REL_ON_QUEUE_EMPTY;
2940 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
2943 mtx_unlock(&dev->sim->devq->send_mtx);
2945 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) == 0)
2946 xpt_release_devq(path, /*count*/1, /*run_queue*/TRUE);
2947 start_ccb->crs.qfrozen_cnt = dev->ccbq.queue.qfrozen_cnt;
2948 start_ccb->ccb_h.status = CAM_REQ_CMP;
2952 struct cam_path *oldpath;
2954 /* Check that all request bits are supported. */
2955 if (start_ccb->cdbg.flags & ~(CAM_DEBUG_COMPILE)) {
2956 start_ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
2960 cam_dflags = CAM_DEBUG_NONE;
2961 if (cam_dpath != NULL) {
2962 oldpath = cam_dpath;
2964 xpt_free_path(oldpath);
2966 if (start_ccb->cdbg.flags != CAM_DEBUG_NONE) {
2967 if (xpt_create_path(&cam_dpath, NULL,
2968 start_ccb->ccb_h.path_id,
2969 start_ccb->ccb_h.target_id,
2970 start_ccb->ccb_h.target_lun) !=
2972 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
2974 cam_dflags = start_ccb->cdbg.flags;
2975 start_ccb->ccb_h.status = CAM_REQ_CMP;
2976 xpt_print(cam_dpath, "debugging flags now %x\n",
2980 start_ccb->ccb_h.status = CAM_REQ_CMP;
2984 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0)
2985 xpt_freeze_devq(path, 1);
2986 start_ccb->ccb_h.status = CAM_REQ_CMP;
2993 printf("%s: CCB type %#x not supported\n", __func__,
2994 start_ccb->ccb_h.func_code);
2995 start_ccb->ccb_h.status = CAM_PROVIDE_FAIL;
2996 if (start_ccb->ccb_h.func_code & XPT_FC_DEV_QUEUED) {
2997 xpt_done(start_ccb);
3004 xpt_polled_action(union ccb *start_ccb)
3007 struct cam_sim *sim;
3008 struct cam_devq *devq;
3011 timeout = start_ccb->ccb_h.timeout * 10;
3012 sim = start_ccb->ccb_h.path->bus->sim;
3014 dev = start_ccb->ccb_h.path->device;
3016 mtx_unlock(&dev->device_mtx);
3019 * Steal an opening so that no other queued requests
3020 * can get it before us while we simulate interrupts.
3022 mtx_lock(&devq->send_mtx);
3023 dev->ccbq.dev_openings--;
3024 while((devq->send_openings <= 0 || dev->ccbq.dev_openings < 0) &&
3026 mtx_unlock(&devq->send_mtx);
3029 (*(sim->sim_poll))(sim);
3030 CAM_SIM_UNLOCK(sim);
3032 mtx_lock(&devq->send_mtx);
3034 dev->ccbq.dev_openings++;
3035 mtx_unlock(&devq->send_mtx);
3038 xpt_action(start_ccb);
3039 while(--timeout > 0) {
3041 (*(sim->sim_poll))(sim);
3042 CAM_SIM_UNLOCK(sim);
3044 if ((start_ccb->ccb_h.status & CAM_STATUS_MASK)
3051 * XXX Is it worth adding a sim_timeout entry
3052 * point so we can attempt recovery? If
3053 * this is only used for dumps, I don't think
3056 start_ccb->ccb_h.status = CAM_CMD_TIMEOUT;
3059 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
3062 mtx_lock(&dev->device_mtx);
3066 * Schedule a peripheral driver to receive a ccb when its
3067 * target device has space for more transactions.
3070 xpt_schedule(struct cam_periph *periph, u_int32_t new_priority)
3073 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("xpt_schedule\n"));
3074 cam_periph_assert(periph, MA_OWNED);
3075 if (new_priority < periph->scheduled_priority) {
3076 periph->scheduled_priority = new_priority;
3077 xpt_run_allocq(periph, 0);
3083 * Schedule a device to run on a given queue.
3084 * If the device was inserted as a new entry on the queue,
3085 * return 1 meaning the device queue should be run. If we
3086 * were already queued, implying someone else has already
3087 * started the queue, return 0 so the caller doesn't attempt
3091 xpt_schedule_dev(struct camq *queue, cam_pinfo *pinfo,
3092 u_int32_t new_priority)
3095 u_int32_t old_priority;
3097 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_schedule_dev\n"));
3099 old_priority = pinfo->priority;
3102 * Are we already queued?
3104 if (pinfo->index != CAM_UNQUEUED_INDEX) {
3105 /* Simply reorder based on new priority */
3106 if (new_priority < old_priority) {
3107 camq_change_priority(queue, pinfo->index,
3109 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3110 ("changed priority to %d\n",
3116 /* New entry on the queue */
3117 if (new_priority < old_priority)
3118 pinfo->priority = new_priority;
3120 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3121 ("Inserting onto queue\n"));
3122 pinfo->generation = ++queue->generation;
3123 camq_insert(queue, pinfo);
3130 xpt_run_allocq_task(void *context, int pending)
3132 struct cam_periph *periph = context;
3134 cam_periph_lock(periph);
3135 periph->flags &= ~CAM_PERIPH_RUN_TASK;
3136 xpt_run_allocq(periph, 1);
3137 cam_periph_unlock(periph);
3138 cam_periph_release(periph);
3142 xpt_run_allocq(struct cam_periph *periph, int sleep)
3144 struct cam_ed *device;
3148 cam_periph_assert(periph, MA_OWNED);
3149 if (periph->periph_allocating)
3151 periph->periph_allocating = 1;
3152 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_allocq(%p)\n", periph));
3153 device = periph->path->device;
3156 while ((prio = min(periph->scheduled_priority,
3157 periph->immediate_priority)) != CAM_PRIORITY_NONE &&
3158 (periph->periph_allocated - (ccb != NULL ? 1 : 0) <
3159 device->ccbq.total_openings || prio <= CAM_PRIORITY_OOB)) {
3162 (ccb = xpt_get_ccb_nowait(periph)) == NULL) {
3164 ccb = xpt_get_ccb(periph);
3167 if (periph->flags & CAM_PERIPH_RUN_TASK)
3169 cam_periph_doacquire(periph);
3170 periph->flags |= CAM_PERIPH_RUN_TASK;
3171 taskqueue_enqueue(xsoftc.xpt_taskq,
3172 &periph->periph_run_task);
3175 xpt_setup_ccb(&ccb->ccb_h, periph->path, prio);
3176 if (prio == periph->immediate_priority) {
3177 periph->immediate_priority = CAM_PRIORITY_NONE;
3178 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3179 ("waking cam_periph_getccb()\n"));
3180 SLIST_INSERT_HEAD(&periph->ccb_list, &ccb->ccb_h,
3182 wakeup(&periph->ccb_list);
3184 periph->scheduled_priority = CAM_PRIORITY_NONE;
3185 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3186 ("calling periph_start()\n"));
3187 periph->periph_start(periph, ccb);
3192 xpt_release_ccb(ccb);
3193 periph->periph_allocating = 0;
3197 xpt_run_devq(struct cam_devq *devq)
3199 char cdb_str[(SCSI_MAX_CDBLEN * 3) + 1];
3202 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_devq\n"));
3204 devq->send_queue.qfrozen_cnt++;
3205 while ((devq->send_queue.entries > 0)
3206 && (devq->send_openings > 0)
3207 && (devq->send_queue.qfrozen_cnt <= 1)) {
3208 struct cam_ed *device;
3209 union ccb *work_ccb;
3210 struct cam_sim *sim;
3212 device = (struct cam_ed *)camq_remove(&devq->send_queue,
3214 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3215 ("running device %p\n", device));
3217 work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD);
3218 if (work_ccb == NULL) {
3219 printf("device on run queue with no ccbs???\n");
3223 if ((work_ccb->ccb_h.flags & CAM_HIGH_POWER) != 0) {
3225 mtx_lock(&xsoftc.xpt_highpower_lock);
3226 if (xsoftc.num_highpower <= 0) {
3228 * We got a high power command, but we
3229 * don't have any available slots. Freeze
3230 * the device queue until we have a slot
3233 xpt_freeze_devq_device(device, 1);
3234 STAILQ_INSERT_TAIL(&xsoftc.highpowerq, device,
3237 mtx_unlock(&xsoftc.xpt_highpower_lock);
3241 * Consume a high power slot while
3244 xsoftc.num_highpower--;
3246 mtx_unlock(&xsoftc.xpt_highpower_lock);
3248 cam_ccbq_remove_ccb(&device->ccbq, work_ccb);
3249 cam_ccbq_send_ccb(&device->ccbq, work_ccb);
3250 devq->send_openings--;
3251 devq->send_active++;
3252 xpt_schedule_devq(devq, device);
3253 mtx_unlock(&devq->send_mtx);
3255 if ((work_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0) {
3257 * The client wants to freeze the queue
3258 * after this CCB is sent.
3260 xpt_freeze_devq(work_ccb->ccb_h.path, 1);
3263 /* In Target mode, the peripheral driver knows best... */
3264 if (work_ccb->ccb_h.func_code == XPT_SCSI_IO) {
3265 if ((device->inq_flags & SID_CmdQue) != 0
3266 && work_ccb->csio.tag_action != CAM_TAG_ACTION_NONE)
3267 work_ccb->ccb_h.flags |= CAM_TAG_ACTION_VALID;
3270 * Clear this in case of a retried CCB that
3271 * failed due to a rejected tag.
3273 work_ccb->ccb_h.flags &= ~CAM_TAG_ACTION_VALID;
3276 switch (work_ccb->ccb_h.func_code) {
3278 CAM_DEBUG(work_ccb->ccb_h.path,
3279 CAM_DEBUG_CDB,("%s. CDB: %s\n",
3280 scsi_op_desc(work_ccb->csio.cdb_io.cdb_bytes[0],
3282 scsi_cdb_string(work_ccb->csio.cdb_io.cdb_bytes,
3283 cdb_str, sizeof(cdb_str))));
3286 CAM_DEBUG(work_ccb->ccb_h.path,
3287 CAM_DEBUG_CDB,("%s. ACB: %s\n",
3288 ata_op_string(&work_ccb->ataio.cmd),
3289 ata_cmd_string(&work_ccb->ataio.cmd,
3290 cdb_str, sizeof(cdb_str))));
3297 * Device queues can be shared among multiple SIM instances
3298 * that reside on different busses. Use the SIM from the
3299 * queued device, rather than the one from the calling bus.
3302 lock = (mtx_owned(sim->mtx) == 0);
3305 (*(sim->sim_action))(sim, work_ccb);
3307 CAM_SIM_UNLOCK(sim);
3308 mtx_lock(&devq->send_mtx);
3310 devq->send_queue.qfrozen_cnt--;
3314 * This function merges stuff from the slave ccb into the master ccb, while
3315 * keeping important fields in the master ccb constant.
3318 xpt_merge_ccb(union ccb *master_ccb, union ccb *slave_ccb)
3322 * Pull fields that are valid for peripheral drivers to set
3323 * into the master CCB along with the CCB "payload".
3325 master_ccb->ccb_h.retry_count = slave_ccb->ccb_h.retry_count;
3326 master_ccb->ccb_h.func_code = slave_ccb->ccb_h.func_code;
3327 master_ccb->ccb_h.timeout = slave_ccb->ccb_h.timeout;
3328 master_ccb->ccb_h.flags = slave_ccb->ccb_h.flags;
3329 bcopy(&(&slave_ccb->ccb_h)[1], &(&master_ccb->ccb_h)[1],
3330 sizeof(union ccb) - sizeof(struct ccb_hdr));
3334 xpt_setup_ccb(struct ccb_hdr *ccb_h, struct cam_path *path, u_int32_t priority)
3337 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_setup_ccb\n"));
3338 ccb_h->pinfo.priority = priority;
3340 ccb_h->path_id = path->bus->path_id;
3342 ccb_h->target_id = path->target->target_id;
3344 ccb_h->target_id = CAM_TARGET_WILDCARD;
3346 ccb_h->target_lun = path->device->lun_id;
3347 ccb_h->pinfo.generation = ++path->device->ccbq.queue.generation;
3349 ccb_h->target_lun = CAM_TARGET_WILDCARD;
3351 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX;
3356 /* Path manipulation functions */
3358 xpt_create_path(struct cam_path **new_path_ptr, struct cam_periph *perph,
3359 path_id_t path_id, target_id_t target_id, lun_id_t lun_id)
3361 struct cam_path *path;
3364 path = (struct cam_path *)malloc(sizeof(*path), M_CAMPATH, M_NOWAIT);
3367 status = CAM_RESRC_UNAVAIL;
3370 status = xpt_compile_path(path, perph, path_id, target_id, lun_id);
3371 if (status != CAM_REQ_CMP) {
3372 free(path, M_CAMPATH);
3375 *new_path_ptr = path;
3380 xpt_create_path_unlocked(struct cam_path **new_path_ptr,
3381 struct cam_periph *periph, path_id_t path_id,
3382 target_id_t target_id, lun_id_t lun_id)
3385 return (xpt_create_path(new_path_ptr, periph, path_id, target_id,
3390 xpt_compile_path(struct cam_path *new_path, struct cam_periph *perph,
3391 path_id_t path_id, target_id_t target_id, lun_id_t lun_id)
3394 struct cam_et *target;
3395 struct cam_ed *device;
3398 status = CAM_REQ_CMP; /* Completed without error */
3399 target = NULL; /* Wildcarded */
3400 device = NULL; /* Wildcarded */
3403 * We will potentially modify the EDT, so block interrupts
3404 * that may attempt to create cam paths.
3406 bus = xpt_find_bus(path_id);
3408 status = CAM_PATH_INVALID;
3411 mtx_lock(&bus->eb_mtx);
3412 target = xpt_find_target(bus, target_id);
3413 if (target == NULL) {
3415 struct cam_et *new_target;
3417 new_target = xpt_alloc_target(bus, target_id);
3418 if (new_target == NULL) {
3419 status = CAM_RESRC_UNAVAIL;
3421 target = new_target;
3425 if (target != NULL) {
3426 device = xpt_find_device(target, lun_id);
3427 if (device == NULL) {
3429 struct cam_ed *new_device;
3432 (*(bus->xport->alloc_device))(bus,
3435 if (new_device == NULL) {
3436 status = CAM_RESRC_UNAVAIL;
3438 device = new_device;
3442 mtx_unlock(&bus->eb_mtx);
3446 * Only touch the user's data if we are successful.
3448 if (status == CAM_REQ_CMP) {
3449 new_path->periph = perph;
3450 new_path->bus = bus;
3451 new_path->target = target;
3452 new_path->device = device;
3453 CAM_DEBUG(new_path, CAM_DEBUG_TRACE, ("xpt_compile_path\n"));
3456 xpt_release_device(device);
3458 xpt_release_target(target);
3460 xpt_release_bus(bus);
3466 xpt_clone_path(struct cam_path **new_path_ptr, struct cam_path *path)
3468 struct cam_path *new_path;
3470 new_path = (struct cam_path *)malloc(sizeof(*path), M_CAMPATH, M_NOWAIT);
3471 if (new_path == NULL)
3472 return(CAM_RESRC_UNAVAIL);
3473 xpt_copy_path(new_path, path);
3474 *new_path_ptr = new_path;
3475 return (CAM_REQ_CMP);
3479 xpt_copy_path(struct cam_path *new_path, struct cam_path *path)
3483 if (path->bus != NULL)
3484 xpt_acquire_bus(path->bus);
3485 if (path->target != NULL)
3486 xpt_acquire_target(path->target);
3487 if (path->device != NULL)
3488 xpt_acquire_device(path->device);
3492 xpt_release_path(struct cam_path *path)
3494 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_path\n"));
3495 if (path->device != NULL) {
3496 xpt_release_device(path->device);
3497 path->device = NULL;
3499 if (path->target != NULL) {
3500 xpt_release_target(path->target);
3501 path->target = NULL;
3503 if (path->bus != NULL) {
3504 xpt_release_bus(path->bus);
3510 xpt_free_path(struct cam_path *path)
3513 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_free_path\n"));
3514 xpt_release_path(path);
3515 free(path, M_CAMPATH);
3519 xpt_path_counts(struct cam_path *path, uint32_t *bus_ref,
3520 uint32_t *periph_ref, uint32_t *target_ref, uint32_t *device_ref)
3526 *bus_ref = path->bus->refcount;
3532 *periph_ref = path->periph->refcount;
3539 *target_ref = path->target->refcount;
3545 *device_ref = path->device->refcount;
3552 * Return -1 for failure, 0 for exact match, 1 for match with wildcards
3553 * in path1, 2 for match with wildcards in path2.
3556 xpt_path_comp(struct cam_path *path1, struct cam_path *path2)
3560 if (path1->bus != path2->bus) {
3561 if (path1->bus->path_id == CAM_BUS_WILDCARD)
3563 else if (path2->bus->path_id == CAM_BUS_WILDCARD)
3568 if (path1->target != path2->target) {
3569 if (path1->target->target_id == CAM_TARGET_WILDCARD) {
3572 } else if (path2->target->target_id == CAM_TARGET_WILDCARD)
3577 if (path1->device != path2->device) {
3578 if (path1->device->lun_id == CAM_LUN_WILDCARD) {
3581 } else if (path2->device->lun_id == CAM_LUN_WILDCARD)
3590 xpt_path_comp_dev(struct cam_path *path, struct cam_ed *dev)
3594 if (path->bus != dev->target->bus) {
3595 if (path->bus->path_id == CAM_BUS_WILDCARD)
3597 else if (dev->target->bus->path_id == CAM_BUS_WILDCARD)
3602 if (path->target != dev->target) {
3603 if (path->target->target_id == CAM_TARGET_WILDCARD) {
3606 } else if (dev->target->target_id == CAM_TARGET_WILDCARD)
3611 if (path->device != dev) {
3612 if (path->device->lun_id == CAM_LUN_WILDCARD) {
3615 } else if (dev->lun_id == CAM_LUN_WILDCARD)
3624 xpt_print_path(struct cam_path *path)
3628 printf("(nopath): ");
3630 if (path->periph != NULL)
3631 printf("(%s%d:", path->periph->periph_name,
3632 path->periph->unit_number);
3634 printf("(noperiph:");
3636 if (path->bus != NULL)
3637 printf("%s%d:%d:", path->bus->sim->sim_name,
3638 path->bus->sim->unit_number,
3639 path->bus->sim->bus_id);
3643 if (path->target != NULL)
3644 printf("%d:", path->target->target_id);
3648 if (path->device != NULL)
3649 printf("%jx): ", (uintmax_t)path->device->lun_id);
3656 xpt_print_device(struct cam_ed *device)
3660 printf("(nopath): ");
3662 printf("(noperiph:%s%d:%d:%d:%jx): ", device->sim->sim_name,
3663 device->sim->unit_number,
3664 device->sim->bus_id,
3665 device->target->target_id,
3666 (uintmax_t)device->lun_id);
3671 xpt_print(struct cam_path *path, const char *fmt, ...)
3674 xpt_print_path(path);
3681 xpt_path_string(struct cam_path *path, char *str, size_t str_len)
3685 sbuf_new(&sb, str, str_len, 0);
3688 sbuf_printf(&sb, "(nopath): ");
3690 if (path->periph != NULL)
3691 sbuf_printf(&sb, "(%s%d:", path->periph->periph_name,
3692 path->periph->unit_number);
3694 sbuf_printf(&sb, "(noperiph:");
3696 if (path->bus != NULL)
3697 sbuf_printf(&sb, "%s%d:%d:", path->bus->sim->sim_name,
3698 path->bus->sim->unit_number,
3699 path->bus->sim->bus_id);
3701 sbuf_printf(&sb, "nobus:");
3703 if (path->target != NULL)
3704 sbuf_printf(&sb, "%d:", path->target->target_id);
3706 sbuf_printf(&sb, "X:");
3708 if (path->device != NULL)
3709 sbuf_printf(&sb, "%jx): ",
3710 (uintmax_t)path->device->lun_id);
3712 sbuf_printf(&sb, "X): ");
3716 return(sbuf_len(&sb));
3720 xpt_path_path_id(struct cam_path *path)
3722 return(path->bus->path_id);
3726 xpt_path_target_id(struct cam_path *path)
3728 if (path->target != NULL)
3729 return (path->target->target_id);
3731 return (CAM_TARGET_WILDCARD);
3735 xpt_path_lun_id(struct cam_path *path)
3737 if (path->device != NULL)
3738 return (path->device->lun_id);
3740 return (CAM_LUN_WILDCARD);
3744 xpt_path_sim(struct cam_path *path)
3747 return (path->bus->sim);
3751 xpt_path_periph(struct cam_path *path)
3754 return (path->periph);
3758 xpt_path_legacy_ata_id(struct cam_path *path)
3763 if ((strcmp(path->bus->sim->sim_name, "ata") != 0) &&
3764 strcmp(path->bus->sim->sim_name, "ahcich") != 0 &&
3765 strcmp(path->bus->sim->sim_name, "mvsch") != 0 &&
3766 strcmp(path->bus->sim->sim_name, "siisch") != 0)
3769 if (strcmp(path->bus->sim->sim_name, "ata") == 0 &&
3770 path->bus->sim->unit_number < 2) {
3771 bus_id = path->bus->sim->unit_number;
3775 TAILQ_FOREACH(bus, &xsoftc.xpt_busses, links) {
3776 if (bus == path->bus)
3778 if ((strcmp(bus->sim->sim_name, "ata") == 0 &&
3779 bus->sim->unit_number >= 2) ||
3780 strcmp(bus->sim->sim_name, "ahcich") == 0 ||
3781 strcmp(bus->sim->sim_name, "mvsch") == 0 ||
3782 strcmp(bus->sim->sim_name, "siisch") == 0)
3787 if (path->target != NULL) {
3788 if (path->target->target_id < 2)
3789 return (bus_id * 2 + path->target->target_id);
3793 return (bus_id * 2);
3797 * Release a CAM control block for the caller. Remit the cost of the structure
3798 * to the device referenced by the path. If the this device had no 'credits'
3799 * and peripheral drivers have registered async callbacks for this notification
3803 xpt_release_ccb(union ccb *free_ccb)
3805 struct cam_ed *device;
3806 struct cam_periph *periph;
3808 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_release_ccb\n"));
3809 xpt_path_assert(free_ccb->ccb_h.path, MA_OWNED);
3810 device = free_ccb->ccb_h.path->device;
3811 periph = free_ccb->ccb_h.path->periph;
3813 xpt_free_ccb(free_ccb);
3814 periph->periph_allocated--;
3815 cam_ccbq_release_opening(&device->ccbq);
3816 xpt_run_allocq(periph, 0);
3819 /* Functions accessed by SIM drivers */
3821 static struct xpt_xport xport_default = {
3822 .alloc_device = xpt_alloc_device_default,
3823 .action = xpt_action_default,
3824 .async = xpt_dev_async_default,
3828 * A sim structure, listing the SIM entry points and instance
3829 * identification info is passed to xpt_bus_register to hook the SIM
3830 * into the CAM framework. xpt_bus_register creates a cam_eb entry
3831 * for this new bus and places it in the array of busses and assigns
3832 * it a path_id. The path_id may be influenced by "hard wiring"
3833 * information specified by the user. Once interrupt services are
3834 * available, the bus will be probed.
3837 xpt_bus_register(struct cam_sim *sim, device_t parent, u_int32_t bus)
3839 struct cam_eb *new_bus;
3840 struct cam_eb *old_bus;
3841 struct ccb_pathinq cpi;
3842 struct cam_path *path;
3845 mtx_assert(sim->mtx, MA_OWNED);
3848 new_bus = (struct cam_eb *)malloc(sizeof(*new_bus),
3849 M_CAMXPT, M_NOWAIT|M_ZERO);
3850 if (new_bus == NULL) {
3851 /* Couldn't satisfy request */
3852 return (CAM_RESRC_UNAVAIL);
3855 mtx_init(&new_bus->eb_mtx, "CAM bus lock", NULL, MTX_DEF);
3856 TAILQ_INIT(&new_bus->et_entries);
3859 timevalclear(&new_bus->last_reset);
3861 new_bus->refcount = 1; /* Held until a bus_deregister event */
3862 new_bus->generation = 0;
3865 sim->path_id = new_bus->path_id =
3866 xptpathid(sim->sim_name, sim->unit_number, sim->bus_id);
3867 old_bus = TAILQ_FIRST(&xsoftc.xpt_busses);
3868 while (old_bus != NULL
3869 && old_bus->path_id < new_bus->path_id)
3870 old_bus = TAILQ_NEXT(old_bus, links);
3871 if (old_bus != NULL)
3872 TAILQ_INSERT_BEFORE(old_bus, new_bus, links);
3874 TAILQ_INSERT_TAIL(&xsoftc.xpt_busses, new_bus, links);
3875 xsoftc.bus_generation++;
3879 * Set a default transport so that a PATH_INQ can be issued to
3880 * the SIM. This will then allow for probing and attaching of
3881 * a more appropriate transport.
3883 new_bus->xport = &xport_default;
3885 status = xpt_create_path(&path, /*periph*/NULL, sim->path_id,
3886 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
3887 if (status != CAM_REQ_CMP) {
3888 xpt_release_bus(new_bus);
3889 free(path, M_CAMXPT);
3890 return (CAM_RESRC_UNAVAIL);
3893 xpt_setup_ccb(&cpi.ccb_h, path, CAM_PRIORITY_NORMAL);
3894 cpi.ccb_h.func_code = XPT_PATH_INQ;
3895 xpt_action((union ccb *)&cpi);
3897 if (cpi.ccb_h.status == CAM_REQ_CMP) {
3898 switch (cpi.transport) {
3906 new_bus->xport = scsi_get_xport();
3910 new_bus->xport = ata_get_xport();
3913 new_bus->xport = &xport_default;
3918 /* Notify interested parties */
3919 if (sim->path_id != CAM_XPT_PATH_ID) {
3921 xpt_async(AC_PATH_REGISTERED, path, &cpi);
3922 if ((cpi.hba_misc & PIM_NOSCAN) == 0) {
3923 union ccb *scan_ccb;
3925 /* Initiate bus rescan. */
3926 scan_ccb = xpt_alloc_ccb_nowait();
3927 if (scan_ccb != NULL) {
3928 scan_ccb->ccb_h.path = path;
3929 scan_ccb->ccb_h.func_code = XPT_SCAN_BUS;
3930 scan_ccb->crcn.flags = 0;
3931 xpt_rescan(scan_ccb);
3934 "Can't allocate CCB to scan bus\n");
3935 xpt_free_path(path);
3938 xpt_free_path(path);
3940 xpt_free_path(path);
3941 return (CAM_SUCCESS);
3945 xpt_bus_deregister(path_id_t pathid)
3947 struct cam_path bus_path;
3950 status = xpt_compile_path(&bus_path, NULL, pathid,
3951 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
3952 if (status != CAM_REQ_CMP)
3955 xpt_async(AC_LOST_DEVICE, &bus_path, NULL);
3956 xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL);
3958 /* Release the reference count held while registered. */
3959 xpt_release_bus(bus_path.bus);
3960 xpt_release_path(&bus_path);
3962 return (CAM_REQ_CMP);
3966 xptnextfreepathid(void)
3972 mtx_assert(&xsoftc.xpt_topo_lock, MA_OWNED);
3974 bus = TAILQ_FIRST(&xsoftc.xpt_busses);
3976 /* Find an unoccupied pathid */
3977 while (bus != NULL && bus->path_id <= pathid) {
3978 if (bus->path_id == pathid)
3980 bus = TAILQ_NEXT(bus, links);
3984 * Ensure that this pathid is not reserved for
3985 * a bus that may be registered in the future.
3987 if (resource_string_value("scbus", pathid, "at", &strval) == 0) {
3989 /* Start the search over */
3996 xptpathid(const char *sim_name, int sim_unit, int sim_bus)
4003 pathid = CAM_XPT_PATH_ID;
4004 snprintf(buf, sizeof(buf), "%s%d", sim_name, sim_unit);
4005 if (strcmp(buf, "xpt0") == 0 && sim_bus == 0)
4008 while ((resource_find_match(&i, &dname, &dunit, "at", buf)) == 0) {
4009 if (strcmp(dname, "scbus")) {
4010 /* Avoid a bit of foot shooting. */
4013 if (dunit < 0) /* unwired?! */
4015 if (resource_int_value("scbus", dunit, "bus", &val) == 0) {
4016 if (sim_bus == val) {
4020 } else if (sim_bus == 0) {
4021 /* Unspecified matches bus 0 */
4025 printf("Ambiguous scbus configuration for %s%d "
4026 "bus %d, cannot wire down. The kernel "
4027 "config entry for scbus%d should "
4028 "specify a controller bus.\n"
4029 "Scbus will be assigned dynamically.\n",
4030 sim_name, sim_unit, sim_bus, dunit);
4035 if (pathid == CAM_XPT_PATH_ID)
4036 pathid = xptnextfreepathid();
4041 xpt_async_string(u_int32_t async_code)
4044 switch (async_code) {
4045 case AC_BUS_RESET: return ("AC_BUS_RESET");
4046 case AC_UNSOL_RESEL: return ("AC_UNSOL_RESEL");
4047 case AC_SCSI_AEN: return ("AC_SCSI_AEN");
4048 case AC_SENT_BDR: return ("AC_SENT_BDR");
4049 case AC_PATH_REGISTERED: return ("AC_PATH_REGISTERED");
4050 case AC_PATH_DEREGISTERED: return ("AC_PATH_DEREGISTERED");
4051 case AC_FOUND_DEVICE: return ("AC_FOUND_DEVICE");
4052 case AC_LOST_DEVICE: return ("AC_LOST_DEVICE");
4053 case AC_TRANSFER_NEG: return ("AC_TRANSFER_NEG");
4054 case AC_INQ_CHANGED: return ("AC_INQ_CHANGED");
4055 case AC_GETDEV_CHANGED: return ("AC_GETDEV_CHANGED");
4056 case AC_CONTRACT: return ("AC_CONTRACT");
4057 case AC_ADVINFO_CHANGED: return ("AC_ADVINFO_CHANGED");
4058 case AC_UNIT_ATTENTION: return ("AC_UNIT_ATTENTION");
4060 return ("AC_UNKNOWN");
4064 xpt_async_size(u_int32_t async_code)
4067 switch (async_code) {
4068 case AC_BUS_RESET: return (0);
4069 case AC_UNSOL_RESEL: return (0);
4070 case AC_SCSI_AEN: return (0);
4071 case AC_SENT_BDR: return (0);
4072 case AC_PATH_REGISTERED: return (sizeof(struct ccb_pathinq));
4073 case AC_PATH_DEREGISTERED: return (0);
4074 case AC_FOUND_DEVICE: return (sizeof(struct ccb_getdev));
4075 case AC_LOST_DEVICE: return (0);
4076 case AC_TRANSFER_NEG: return (sizeof(struct ccb_trans_settings));
4077 case AC_INQ_CHANGED: return (0);
4078 case AC_GETDEV_CHANGED: return (0);
4079 case AC_CONTRACT: return (sizeof(struct ac_contract));
4080 case AC_ADVINFO_CHANGED: return (-1);
4081 case AC_UNIT_ATTENTION: return (sizeof(struct ccb_scsiio));
4087 xpt_async_process_dev(struct cam_ed *device, void *arg)
4089 union ccb *ccb = arg;
4090 struct cam_path *path = ccb->ccb_h.path;
4091 void *async_arg = ccb->casync.async_arg_ptr;
4092 u_int32_t async_code = ccb->casync.async_code;
4095 if (path->device != device
4096 && path->device->lun_id != CAM_LUN_WILDCARD
4097 && device->lun_id != CAM_LUN_WILDCARD)
4101 * The async callback could free the device.
4102 * If it is a broadcast async, it doesn't hold
4103 * device reference, so take our own reference.
4105 xpt_acquire_device(device);
4108 * If async for specific device is to be delivered to
4109 * the wildcard client, take the specific device lock.
4110 * XXX: We may need a way for client to specify it.
4112 if ((device->lun_id == CAM_LUN_WILDCARD &&
4113 path->device->lun_id != CAM_LUN_WILDCARD) ||
4114 (device->target->target_id == CAM_TARGET_WILDCARD &&
4115 path->target->target_id != CAM_TARGET_WILDCARD) ||
4116 (device->target->bus->path_id == CAM_BUS_WILDCARD &&
4117 path->target->bus->path_id != CAM_BUS_WILDCARD)) {
4118 mtx_unlock(&device->device_mtx);
4119 xpt_path_lock(path);
4124 (*(device->target->bus->xport->async))(async_code,
4125 device->target->bus, device->target, device, async_arg);
4126 xpt_async_bcast(&device->asyncs, async_code, path, async_arg);
4129 xpt_path_unlock(path);
4130 mtx_lock(&device->device_mtx);
4132 xpt_release_device(device);
4137 xpt_async_process_tgt(struct cam_et *target, void *arg)
4139 union ccb *ccb = arg;
4140 struct cam_path *path = ccb->ccb_h.path;
4142 if (path->target != target
4143 && path->target->target_id != CAM_TARGET_WILDCARD
4144 && target->target_id != CAM_TARGET_WILDCARD)
4147 if (ccb->casync.async_code == AC_SENT_BDR) {
4148 /* Update our notion of when the last reset occurred */
4149 microtime(&target->last_reset);
4152 return (xptdevicetraverse(target, NULL, xpt_async_process_dev, ccb));
4156 xpt_async_process(struct cam_periph *periph, union ccb *ccb)
4159 struct cam_path *path;
4161 u_int32_t async_code;
4163 path = ccb->ccb_h.path;
4164 async_code = ccb->casync.async_code;
4165 async_arg = ccb->casync.async_arg_ptr;
4166 CAM_DEBUG(path, CAM_DEBUG_TRACE | CAM_DEBUG_INFO,
4167 ("xpt_async(%s)\n", xpt_async_string(async_code)));
4170 if (async_code == AC_BUS_RESET) {
4171 /* Update our notion of when the last reset occurred */
4172 microtime(&bus->last_reset);
4175 xpttargettraverse(bus, NULL, xpt_async_process_tgt, ccb);
4178 * If this wasn't a fully wildcarded async, tell all
4179 * clients that want all async events.
4181 if (bus != xpt_periph->path->bus) {
4182 xpt_path_lock(xpt_periph->path);
4183 xpt_async_process_dev(xpt_periph->path->device, ccb);
4184 xpt_path_unlock(xpt_periph->path);
4187 if (path->device != NULL && path->device->lun_id != CAM_LUN_WILDCARD)
4188 xpt_release_devq(path, 1, TRUE);
4190 xpt_release_simq(path->bus->sim, TRUE);
4191 if (ccb->casync.async_arg_size > 0)
4192 free(async_arg, M_CAMXPT);
4193 xpt_free_path(path);
4198 xpt_async_bcast(struct async_list *async_head,
4199 u_int32_t async_code,
4200 struct cam_path *path, void *async_arg)
4202 struct async_node *cur_entry;
4205 cur_entry = SLIST_FIRST(async_head);
4206 while (cur_entry != NULL) {
4207 struct async_node *next_entry;
4209 * Grab the next list entry before we call the current
4210 * entry's callback. This is because the callback function
4211 * can delete its async callback entry.
4213 next_entry = SLIST_NEXT(cur_entry, links);
4214 if ((cur_entry->event_enable & async_code) != 0) {
4215 lock = cur_entry->event_lock;
4217 CAM_SIM_LOCK(path->device->sim);
4218 cur_entry->callback(cur_entry->callback_arg,
4222 CAM_SIM_UNLOCK(path->device->sim);
4224 cur_entry = next_entry;
4229 xpt_async(u_int32_t async_code, struct cam_path *path, void *async_arg)
4234 ccb = xpt_alloc_ccb_nowait();
4236 xpt_print(path, "Can't allocate CCB to send %s\n",
4237 xpt_async_string(async_code));
4241 if (xpt_clone_path(&ccb->ccb_h.path, path) != CAM_REQ_CMP) {
4242 xpt_print(path, "Can't allocate path to send %s\n",
4243 xpt_async_string(async_code));
4247 ccb->ccb_h.path->periph = NULL;
4248 ccb->ccb_h.func_code = XPT_ASYNC;
4249 ccb->ccb_h.cbfcnp = xpt_async_process;
4250 ccb->ccb_h.flags |= CAM_UNLOCKED;
4251 ccb->casync.async_code = async_code;
4252 ccb->casync.async_arg_size = 0;
4253 size = xpt_async_size(async_code);
4254 if (size > 0 && async_arg != NULL) {
4255 ccb->casync.async_arg_ptr = malloc(size, M_CAMXPT, M_NOWAIT);
4256 if (ccb->casync.async_arg_ptr == NULL) {
4257 xpt_print(path, "Can't allocate argument to send %s\n",
4258 xpt_async_string(async_code));
4259 xpt_free_path(ccb->ccb_h.path);
4263 memcpy(ccb->casync.async_arg_ptr, async_arg, size);
4264 ccb->casync.async_arg_size = size;
4265 } else if (size < 0)
4266 ccb->casync.async_arg_size = size;
4267 if (path->device != NULL && path->device->lun_id != CAM_LUN_WILDCARD)
4268 xpt_freeze_devq(path, 1);
4270 xpt_freeze_simq(path->bus->sim, 1);
4275 xpt_dev_async_default(u_int32_t async_code, struct cam_eb *bus,
4276 struct cam_et *target, struct cam_ed *device,
4281 * We only need to handle events for real devices.
4283 if (target->target_id == CAM_TARGET_WILDCARD
4284 || device->lun_id == CAM_LUN_WILDCARD)
4287 printf("%s called\n", __func__);
4291 xpt_freeze_devq_device(struct cam_ed *dev, u_int count)
4293 struct cam_devq *devq;
4296 devq = dev->sim->devq;
4297 mtx_assert(&devq->send_mtx, MA_OWNED);
4298 CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE,
4299 ("xpt_freeze_devq_device(%d) %u->%u\n", count,
4300 dev->ccbq.queue.qfrozen_cnt, dev->ccbq.queue.qfrozen_cnt + count));
4301 freeze = (dev->ccbq.queue.qfrozen_cnt += count);
4302 /* Remove frozen device from sendq. */
4303 if (device_is_queued(dev))
4304 camq_remove(&devq->send_queue, dev->devq_entry.index);
4309 xpt_freeze_devq(struct cam_path *path, u_int count)
4311 struct cam_ed *dev = path->device;
4312 struct cam_devq *devq;
4315 devq = dev->sim->devq;
4316 mtx_lock(&devq->send_mtx);
4317 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_freeze_devq(%d)\n", count));
4318 freeze = xpt_freeze_devq_device(dev, count);
4319 mtx_unlock(&devq->send_mtx);
4324 xpt_freeze_simq(struct cam_sim *sim, u_int count)
4326 struct cam_devq *devq;
4330 mtx_lock(&devq->send_mtx);
4331 freeze = (devq->send_queue.qfrozen_cnt += count);
4332 mtx_unlock(&devq->send_mtx);
4337 xpt_release_devq_timeout(void *arg)
4340 struct cam_devq *devq;
4342 dev = (struct cam_ed *)arg;
4343 CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE, ("xpt_release_devq_timeout\n"));
4344 devq = dev->sim->devq;
4345 mtx_assert(&devq->send_mtx, MA_OWNED);
4346 if (xpt_release_devq_device(dev, /*count*/1, /*run_queue*/TRUE))
4351 xpt_release_devq(struct cam_path *path, u_int count, int run_queue)
4354 struct cam_devq *devq;
4356 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_devq(%d, %d)\n",
4359 devq = dev->sim->devq;
4360 mtx_lock(&devq->send_mtx);
4361 if (xpt_release_devq_device(dev, count, run_queue))
4362 xpt_run_devq(dev->sim->devq);
4363 mtx_unlock(&devq->send_mtx);
4367 xpt_release_devq_device(struct cam_ed *dev, u_int count, int run_queue)
4370 mtx_assert(&dev->sim->devq->send_mtx, MA_OWNED);
4371 CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE,
4372 ("xpt_release_devq_device(%d, %d) %u->%u\n", count, run_queue,
4373 dev->ccbq.queue.qfrozen_cnt, dev->ccbq.queue.qfrozen_cnt - count));
4374 if (count > dev->ccbq.queue.qfrozen_cnt) {
4376 printf("xpt_release_devq(): requested %u > present %u\n",
4377 count, dev->ccbq.queue.qfrozen_cnt);
4379 count = dev->ccbq.queue.qfrozen_cnt;
4381 dev->ccbq.queue.qfrozen_cnt -= count;
4382 if (dev->ccbq.queue.qfrozen_cnt == 0) {
4384 * No longer need to wait for a successful
4385 * command completion.
4387 dev->flags &= ~CAM_DEV_REL_ON_COMPLETE;
4389 * Remove any timeouts that might be scheduled
4390 * to release this queue.
4392 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) {
4393 callout_stop(&dev->callout);
4394 dev->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING;
4397 * Now that we are unfrozen schedule the
4398 * device so any pending transactions are
4401 xpt_schedule_devq(dev->sim->devq, dev);
4408 xpt_release_simq(struct cam_sim *sim, int run_queue)
4410 struct cam_devq *devq;
4413 mtx_lock(&devq->send_mtx);
4414 if (devq->send_queue.qfrozen_cnt <= 0) {
4416 printf("xpt_release_simq: requested 1 > present %u\n",
4417 devq->send_queue.qfrozen_cnt);
4420 devq->send_queue.qfrozen_cnt--;
4421 if (devq->send_queue.qfrozen_cnt == 0) {
4423 * If there is a timeout scheduled to release this
4424 * sim queue, remove it. The queue frozen count is
4427 if ((sim->flags & CAM_SIM_REL_TIMEOUT_PENDING) != 0){
4428 callout_stop(&sim->callout);
4429 sim->flags &= ~CAM_SIM_REL_TIMEOUT_PENDING;
4433 * Now that we are unfrozen run the send queue.
4435 xpt_run_devq(sim->devq);
4438 mtx_unlock(&devq->send_mtx);
4442 * XXX Appears to be unused.
4445 xpt_release_simq_timeout(void *arg)
4447 struct cam_sim *sim;
4449 sim = (struct cam_sim *)arg;
4450 xpt_release_simq(sim, /* run_queue */ TRUE);
4454 xpt_done(union ccb *done_ccb)
4456 struct cam_doneq *queue;
4459 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_done\n"));
4460 if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) == 0)
4463 hash = (done_ccb->ccb_h.path_id + done_ccb->ccb_h.target_id +
4464 done_ccb->ccb_h.target_lun) % cam_num_doneqs;
4465 queue = &cam_doneqs[hash];
4466 mtx_lock(&queue->cam_doneq_mtx);
4467 run = (queue->cam_doneq_sleep && STAILQ_EMPTY(&queue->cam_doneq));
4468 STAILQ_INSERT_TAIL(&queue->cam_doneq, &done_ccb->ccb_h, sim_links.stqe);
4469 done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX;
4470 mtx_unlock(&queue->cam_doneq_mtx);
4472 wakeup(&queue->cam_doneq);
4476 xpt_done_direct(union ccb *done_ccb)
4479 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_done_direct\n"));
4480 if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) == 0)
4483 xpt_done_process(&done_ccb->ccb_h);
4491 new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_WAITOK);
4496 xpt_alloc_ccb_nowait()
4500 new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_NOWAIT);
4505 xpt_free_ccb(union ccb *free_ccb)
4507 free(free_ccb, M_CAMCCB);
4512 /* Private XPT functions */
4515 * Get a CAM control block for the caller. Charge the structure to the device
4516 * referenced by the path. If we don't have sufficient resources to allocate
4517 * more ccbs, we return NULL.
4520 xpt_get_ccb_nowait(struct cam_periph *periph)
4524 new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_NOWAIT);
4525 if (new_ccb == NULL)
4527 periph->periph_allocated++;
4528 cam_ccbq_take_opening(&periph->path->device->ccbq);
4533 xpt_get_ccb(struct cam_periph *periph)
4537 cam_periph_unlock(periph);
4538 new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_WAITOK);
4539 cam_periph_lock(periph);
4540 periph->periph_allocated++;
4541 cam_ccbq_take_opening(&periph->path->device->ccbq);
4546 cam_periph_getccb(struct cam_periph *periph, u_int32_t priority)
4548 struct ccb_hdr *ccb_h;
4550 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("cam_periph_getccb\n"));
4551 cam_periph_assert(periph, MA_OWNED);
4552 while ((ccb_h = SLIST_FIRST(&periph->ccb_list)) == NULL ||
4553 ccb_h->pinfo.priority != priority) {
4554 if (priority < periph->immediate_priority) {
4555 periph->immediate_priority = priority;
4556 xpt_run_allocq(periph, 0);
4558 cam_periph_sleep(periph, &periph->ccb_list, PRIBIO,
4561 SLIST_REMOVE_HEAD(&periph->ccb_list, periph_links.sle);
4562 return ((union ccb *)ccb_h);
4566 xpt_acquire_bus(struct cam_eb *bus)
4575 xpt_release_bus(struct cam_eb *bus)
4579 KASSERT(bus->refcount >= 1, ("bus->refcount >= 1"));
4580 if (--bus->refcount > 0) {
4584 TAILQ_REMOVE(&xsoftc.xpt_busses, bus, links);
4585 xsoftc.bus_generation++;
4587 KASSERT(TAILQ_EMPTY(&bus->et_entries),
4588 ("destroying bus, but target list is not empty"));
4589 cam_sim_release(bus->sim);
4590 mtx_destroy(&bus->eb_mtx);
4591 free(bus, M_CAMXPT);
4594 static struct cam_et *
4595 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id)
4597 struct cam_et *cur_target, *target;
4599 mtx_assert(&xsoftc.xpt_topo_lock, MA_OWNED);
4600 mtx_assert(&bus->eb_mtx, MA_OWNED);
4601 target = (struct cam_et *)malloc(sizeof(*target), M_CAMXPT,
4606 TAILQ_INIT(&target->ed_entries);
4608 target->target_id = target_id;
4609 target->refcount = 1;
4610 target->generation = 0;
4611 target->luns = NULL;
4612 mtx_init(&target->luns_mtx, "CAM LUNs lock", NULL, MTX_DEF);
4613 timevalclear(&target->last_reset);
4615 * Hold a reference to our parent bus so it
4616 * will not go away before we do.
4620 /* Insertion sort into our bus's target list */
4621 cur_target = TAILQ_FIRST(&bus->et_entries);
4622 while (cur_target != NULL && cur_target->target_id < target_id)
4623 cur_target = TAILQ_NEXT(cur_target, links);
4624 if (cur_target != NULL) {
4625 TAILQ_INSERT_BEFORE(cur_target, target, links);
4627 TAILQ_INSERT_TAIL(&bus->et_entries, target, links);
4634 xpt_acquire_target(struct cam_et *target)
4636 struct cam_eb *bus = target->bus;
4638 mtx_lock(&bus->eb_mtx);
4640 mtx_unlock(&bus->eb_mtx);
4644 xpt_release_target(struct cam_et *target)
4646 struct cam_eb *bus = target->bus;
4648 mtx_lock(&bus->eb_mtx);
4649 if (--target->refcount > 0) {
4650 mtx_unlock(&bus->eb_mtx);
4653 TAILQ_REMOVE(&bus->et_entries, target, links);
4655 mtx_unlock(&bus->eb_mtx);
4656 KASSERT(TAILQ_EMPTY(&target->ed_entries),
4657 ("destroying target, but device list is not empty"));
4658 xpt_release_bus(bus);
4659 mtx_destroy(&target->luns_mtx);
4661 free(target->luns, M_CAMXPT);
4662 free(target, M_CAMXPT);
4665 static struct cam_ed *
4666 xpt_alloc_device_default(struct cam_eb *bus, struct cam_et *target,
4669 struct cam_ed *device;
4671 device = xpt_alloc_device(bus, target, lun_id);
4675 device->mintags = 1;
4676 device->maxtags = 1;
4681 xpt_destroy_device(void *context, int pending)
4683 struct cam_ed *device = context;
4685 mtx_lock(&device->device_mtx);
4686 mtx_destroy(&device->device_mtx);
4687 free(device, M_CAMDEV);
4691 xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, lun_id_t lun_id)
4693 struct cam_ed *cur_device, *device;
4694 struct cam_devq *devq;
4697 mtx_assert(&bus->eb_mtx, MA_OWNED);
4698 /* Make space for us in the device queue on our bus */
4699 devq = bus->sim->devq;
4700 mtx_lock(&devq->send_mtx);
4701 status = cam_devq_resize(devq, devq->send_queue.array_size + 1);
4702 mtx_unlock(&devq->send_mtx);
4703 if (status != CAM_REQ_CMP)
4706 device = (struct cam_ed *)malloc(sizeof(*device),
4707 M_CAMDEV, M_NOWAIT|M_ZERO);
4711 cam_init_pinfo(&device->devq_entry);
4712 device->target = target;
4713 device->lun_id = lun_id;
4714 device->sim = bus->sim;
4715 if (cam_ccbq_init(&device->ccbq,
4716 bus->sim->max_dev_openings) != 0) {
4717 free(device, M_CAMDEV);
4720 SLIST_INIT(&device->asyncs);
4721 SLIST_INIT(&device->periphs);
4722 device->generation = 0;
4723 device->flags = CAM_DEV_UNCONFIGURED;
4724 device->tag_delay_count = 0;
4725 device->tag_saved_openings = 0;
4726 device->refcount = 1;
4727 mtx_init(&device->device_mtx, "CAM device lock", NULL, MTX_DEF);
4728 callout_init_mtx(&device->callout, &devq->send_mtx, 0);
4729 TASK_INIT(&device->device_destroy_task, 0, xpt_destroy_device, device);
4731 * Hold a reference to our parent bus so it
4732 * will not go away before we do.
4736 cur_device = TAILQ_FIRST(&target->ed_entries);
4737 while (cur_device != NULL && cur_device->lun_id < lun_id)
4738 cur_device = TAILQ_NEXT(cur_device, links);
4739 if (cur_device != NULL)
4740 TAILQ_INSERT_BEFORE(cur_device, device, links);
4742 TAILQ_INSERT_TAIL(&target->ed_entries, device, links);
4743 target->generation++;
4748 xpt_acquire_device(struct cam_ed *device)
4750 struct cam_eb *bus = device->target->bus;
4752 mtx_lock(&bus->eb_mtx);
4754 mtx_unlock(&bus->eb_mtx);
4758 xpt_release_device(struct cam_ed *device)
4760 struct cam_eb *bus = device->target->bus;
4761 struct cam_devq *devq;
4763 mtx_lock(&bus->eb_mtx);
4764 if (--device->refcount > 0) {
4765 mtx_unlock(&bus->eb_mtx);
4769 TAILQ_REMOVE(&device->target->ed_entries, device,links);
4770 device->target->generation++;
4771 mtx_unlock(&bus->eb_mtx);
4773 /* Release our slot in the devq */
4774 devq = bus->sim->devq;
4775 mtx_lock(&devq->send_mtx);
4776 cam_devq_resize(devq, devq->send_queue.array_size - 1);
4777 mtx_unlock(&devq->send_mtx);
4779 KASSERT(SLIST_EMPTY(&device->periphs),
4780 ("destroying device, but periphs list is not empty"));
4781 KASSERT(device->devq_entry.index == CAM_UNQUEUED_INDEX,
4782 ("destroying device while still queued for ccbs"));
4784 if ((device->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0)
4785 callout_stop(&device->callout);
4787 xpt_release_target(device->target);
4789 cam_ccbq_fini(&device->ccbq);
4791 * Free allocated memory. free(9) does nothing if the
4792 * supplied pointer is NULL, so it is safe to call without
4795 free(device->supported_vpds, M_CAMXPT);
4796 free(device->device_id, M_CAMXPT);
4797 free(device->ext_inq, M_CAMXPT);
4798 free(device->physpath, M_CAMXPT);
4799 free(device->rcap_buf, M_CAMXPT);
4800 free(device->serial_num, M_CAMXPT);
4801 taskqueue_enqueue(xsoftc.xpt_taskq, &device->device_destroy_task);
4805 xpt_dev_ccbq_resize(struct cam_path *path, int newopenings)
4811 mtx_lock(&dev->sim->devq->send_mtx);
4812 result = cam_ccbq_resize(&dev->ccbq, newopenings);
4813 mtx_unlock(&dev->sim->devq->send_mtx);
4814 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
4815 || (dev->inq_flags & SID_CmdQue) != 0)
4816 dev->tag_saved_openings = newopenings;
4820 static struct cam_eb *
4821 xpt_find_bus(path_id_t path_id)
4826 for (bus = TAILQ_FIRST(&xsoftc.xpt_busses);
4828 bus = TAILQ_NEXT(bus, links)) {
4829 if (bus->path_id == path_id) {
4838 static struct cam_et *
4839 xpt_find_target(struct cam_eb *bus, target_id_t target_id)
4841 struct cam_et *target;
4843 mtx_assert(&bus->eb_mtx, MA_OWNED);
4844 for (target = TAILQ_FIRST(&bus->et_entries);
4846 target = TAILQ_NEXT(target, links)) {
4847 if (target->target_id == target_id) {
4855 static struct cam_ed *
4856 xpt_find_device(struct cam_et *target, lun_id_t lun_id)
4858 struct cam_ed *device;
4860 mtx_assert(&target->bus->eb_mtx, MA_OWNED);
4861 for (device = TAILQ_FIRST(&target->ed_entries);
4863 device = TAILQ_NEXT(device, links)) {
4864 if (device->lun_id == lun_id) {
4873 xpt_start_tags(struct cam_path *path)
4875 struct ccb_relsim crs;
4876 struct cam_ed *device;
4877 struct cam_sim *sim;
4880 device = path->device;
4881 sim = path->bus->sim;
4882 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT;
4883 xpt_freeze_devq(path, /*count*/1);
4884 device->inq_flags |= SID_CmdQue;
4885 if (device->tag_saved_openings != 0)
4886 newopenings = device->tag_saved_openings;
4888 newopenings = min(device->maxtags,
4889 sim->max_tagged_dev_openings);
4890 xpt_dev_ccbq_resize(path, newopenings);
4891 xpt_async(AC_GETDEV_CHANGED, path, NULL);
4892 xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL);
4893 crs.ccb_h.func_code = XPT_REL_SIMQ;
4894 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY;
4896 = crs.release_timeout
4899 xpt_action((union ccb *)&crs);
4903 xpt_stop_tags(struct cam_path *path)
4905 struct ccb_relsim crs;
4906 struct cam_ed *device;
4907 struct cam_sim *sim;
4909 device = path->device;
4910 sim = path->bus->sim;
4911 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT;
4912 device->tag_delay_count = 0;
4913 xpt_freeze_devq(path, /*count*/1);
4914 device->inq_flags &= ~SID_CmdQue;
4915 xpt_dev_ccbq_resize(path, sim->max_dev_openings);
4916 xpt_async(AC_GETDEV_CHANGED, path, NULL);
4917 xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL);
4918 crs.ccb_h.func_code = XPT_REL_SIMQ;
4919 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY;
4921 = crs.release_timeout
4924 xpt_action((union ccb *)&crs);
4928 xpt_boot_delay(void *arg)
4935 xpt_config(void *arg)
4938 * Now that interrupts are enabled, go find our devices
4940 if (taskqueue_start_threads(&xsoftc.xpt_taskq, 1, PRIBIO, "CAM taskq"))
4941 printf("xpt_config: failed to create taskqueue thread.\n");
4943 /* Setup debugging path */
4944 if (cam_dflags != CAM_DEBUG_NONE) {
4945 if (xpt_create_path(&cam_dpath, NULL,
4946 CAM_DEBUG_BUS, CAM_DEBUG_TARGET,
4947 CAM_DEBUG_LUN) != CAM_REQ_CMP) {
4948 printf("xpt_config: xpt_create_path() failed for debug"
4949 " target %d:%d:%d, debugging disabled\n",
4950 CAM_DEBUG_BUS, CAM_DEBUG_TARGET, CAM_DEBUG_LUN);
4951 cam_dflags = CAM_DEBUG_NONE;
4956 periphdriver_init(1);
4958 callout_init(&xsoftc.boot_callout, 1);
4959 callout_reset_sbt(&xsoftc.boot_callout, SBT_1MS * xsoftc.boot_delay, 0,
4960 xpt_boot_delay, NULL, 0);
4961 /* Fire up rescan thread. */
4962 if (kproc_kthread_add(xpt_scanner_thread, NULL, &cam_proc, NULL, 0, 0,
4963 "cam", "scanner")) {
4964 printf("xpt_config: failed to create rescan thread.\n");
4972 xsoftc.buses_to_config++;
4977 xpt_release_boot(void)
4980 xsoftc.buses_to_config--;
4981 if (xsoftc.buses_to_config == 0 && xsoftc.buses_config_done == 0) {
4982 struct xpt_task *task;
4984 xsoftc.buses_config_done = 1;
4986 /* Call manually because we don't have any busses */
4987 task = malloc(sizeof(struct xpt_task), M_CAMXPT, M_NOWAIT);
4989 TASK_INIT(&task->task, 0, xpt_finishconfig_task, task);
4990 taskqueue_enqueue(taskqueue_thread, &task->task);
4997 * If the given device only has one peripheral attached to it, and if that
4998 * peripheral is the passthrough driver, announce it. This insures that the
4999 * user sees some sort of announcement for every peripheral in their system.
5002 xptpassannouncefunc(struct cam_ed *device, void *arg)
5004 struct cam_periph *periph;
5007 for (periph = SLIST_FIRST(&device->periphs), i = 0; periph != NULL;
5008 periph = SLIST_NEXT(periph, periph_links), i++);
5010 periph = SLIST_FIRST(&device->periphs);
5012 && (strncmp(periph->periph_name, "pass", 4) == 0))
5013 xpt_announce_periph(periph, NULL);
5019 xpt_finishconfig_task(void *context, int pending)
5022 periphdriver_init(2);
5024 * Check for devices with no "standard" peripheral driver
5025 * attached. For any devices like that, announce the
5026 * passthrough driver so the user will see something.
5029 xpt_for_all_devices(xptpassannouncefunc, NULL);
5031 /* Release our hook so that the boot can continue. */
5032 config_intrhook_disestablish(xsoftc.xpt_config_hook);
5033 free(xsoftc.xpt_config_hook, M_CAMXPT);
5034 xsoftc.xpt_config_hook = NULL;
5036 free(context, M_CAMXPT);
5040 xpt_register_async(int event, ac_callback_t *cbfunc, void *cbarg,
5041 struct cam_path *path)
5043 struct ccb_setasync csa;
5048 status = xpt_create_path(&path, /*periph*/NULL, CAM_XPT_PATH_ID,
5049 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
5050 if (status != CAM_REQ_CMP)
5052 xpt_path_lock(path);
5056 xpt_setup_ccb(&csa.ccb_h, path, CAM_PRIORITY_NORMAL);
5057 csa.ccb_h.func_code = XPT_SASYNC_CB;
5058 csa.event_enable = event;
5059 csa.callback = cbfunc;
5060 csa.callback_arg = cbarg;
5061 xpt_action((union ccb *)&csa);
5062 status = csa.ccb_h.status;
5065 xpt_path_unlock(path);
5066 xpt_free_path(path);
5069 if ((status == CAM_REQ_CMP) &&
5070 (csa.event_enable & AC_FOUND_DEVICE)) {
5072 * Get this peripheral up to date with all
5073 * the currently existing devices.
5075 xpt_for_all_devices(xptsetasyncfunc, &csa);
5077 if ((status == CAM_REQ_CMP) &&
5078 (csa.event_enable & AC_PATH_REGISTERED)) {
5080 * Get this peripheral up to date with all
5081 * the currently existing busses.
5083 xpt_for_all_busses(xptsetasyncbusfunc, &csa);
5090 xptaction(struct cam_sim *sim, union ccb *work_ccb)
5092 CAM_DEBUG(work_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xptaction\n"));
5094 switch (work_ccb->ccb_h.func_code) {
5095 /* Common cases first */
5096 case XPT_PATH_INQ: /* Path routing inquiry */
5098 struct ccb_pathinq *cpi;
5100 cpi = &work_ccb->cpi;
5101 cpi->version_num = 1; /* XXX??? */
5102 cpi->hba_inquiry = 0;
5103 cpi->target_sprt = 0;
5105 cpi->hba_eng_cnt = 0;
5106 cpi->max_target = 0;
5108 cpi->initiator_id = 0;
5109 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
5110 strncpy(cpi->hba_vid, "", HBA_IDLEN);
5111 strncpy(cpi->dev_name, sim->sim_name, DEV_IDLEN);
5112 cpi->unit_number = sim->unit_number;
5113 cpi->bus_id = sim->bus_id;
5114 cpi->base_transfer_speed = 0;
5115 cpi->protocol = PROTO_UNSPECIFIED;
5116 cpi->protocol_version = PROTO_VERSION_UNSPECIFIED;
5117 cpi->transport = XPORT_UNSPECIFIED;
5118 cpi->transport_version = XPORT_VERSION_UNSPECIFIED;
5119 cpi->ccb_h.status = CAM_REQ_CMP;
5124 work_ccb->ccb_h.status = CAM_REQ_INVALID;
5131 * The xpt as a "controller" has no interrupt sources, so polling
5135 xptpoll(struct cam_sim *sim)
5140 xpt_lock_buses(void)
5142 mtx_lock(&xsoftc.xpt_topo_lock);
5146 xpt_unlock_buses(void)
5148 mtx_unlock(&xsoftc.xpt_topo_lock);
5152 xpt_path_mtx(struct cam_path *path)
5155 return (&path->device->device_mtx);
5159 xpt_done_process(struct ccb_hdr *ccb_h)
5161 struct cam_sim *sim;
5162 struct cam_devq *devq;
5163 struct mtx *mtx = NULL;
5165 if (ccb_h->flags & CAM_HIGH_POWER) {
5166 struct highpowerlist *hphead;
5167 struct cam_ed *device;
5169 mtx_lock(&xsoftc.xpt_highpower_lock);
5170 hphead = &xsoftc.highpowerq;
5172 device = STAILQ_FIRST(hphead);
5175 * Increment the count since this command is done.
5177 xsoftc.num_highpower++;
5180 * Any high powered commands queued up?
5182 if (device != NULL) {
5184 STAILQ_REMOVE_HEAD(hphead, highpowerq_entry);
5185 mtx_unlock(&xsoftc.xpt_highpower_lock);
5187 mtx_lock(&device->sim->devq->send_mtx);
5188 xpt_release_devq_device(device,
5189 /*count*/1, /*runqueue*/TRUE);
5190 mtx_unlock(&device->sim->devq->send_mtx);
5192 mtx_unlock(&xsoftc.xpt_highpower_lock);
5195 sim = ccb_h->path->bus->sim;
5197 if (ccb_h->status & CAM_RELEASE_SIMQ) {
5198 xpt_release_simq(sim, /*run_queue*/FALSE);
5199 ccb_h->status &= ~CAM_RELEASE_SIMQ;
5202 if ((ccb_h->flags & CAM_DEV_QFRZDIS)
5203 && (ccb_h->status & CAM_DEV_QFRZN)) {
5204 xpt_release_devq(ccb_h->path, /*count*/1, /*run_queue*/TRUE);
5205 ccb_h->status &= ~CAM_DEV_QFRZN;
5209 if ((ccb_h->func_code & XPT_FC_USER_CCB) == 0) {
5210 struct cam_ed *dev = ccb_h->path->device;
5212 mtx_lock(&devq->send_mtx);
5213 devq->send_active--;
5214 devq->send_openings++;
5215 cam_ccbq_ccb_done(&dev->ccbq, (union ccb *)ccb_h);
5217 if (((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0
5218 && (dev->ccbq.dev_active == 0))) {
5219 dev->flags &= ~CAM_DEV_REL_ON_QUEUE_EMPTY;
5220 xpt_release_devq_device(dev, /*count*/1,
5221 /*run_queue*/FALSE);
5224 if (((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0
5225 && (ccb_h->status&CAM_STATUS_MASK) != CAM_REQUEUE_REQ)) {
5226 dev->flags &= ~CAM_DEV_REL_ON_COMPLETE;
5227 xpt_release_devq_device(dev, /*count*/1,
5228 /*run_queue*/FALSE);
5231 if (!device_is_queued(dev))
5232 (void)xpt_schedule_devq(devq, dev);
5234 mtx_unlock(&devq->send_mtx);
5236 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0) {
5237 mtx = xpt_path_mtx(ccb_h->path);
5240 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
5241 && (--dev->tag_delay_count == 0))
5242 xpt_start_tags(ccb_h->path);
5246 if ((ccb_h->flags & CAM_UNLOCKED) == 0) {
5248 mtx = xpt_path_mtx(ccb_h->path);
5258 /* Call the peripheral driver's callback */
5259 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX;
5260 (*ccb_h->cbfcnp)(ccb_h->path->periph, (union ccb *)ccb_h);
5266 xpt_done_td(void *arg)
5268 struct cam_doneq *queue = arg;
5269 struct ccb_hdr *ccb_h;
5270 STAILQ_HEAD(, ccb_hdr) doneq;
5272 STAILQ_INIT(&doneq);
5273 mtx_lock(&queue->cam_doneq_mtx);
5275 while (STAILQ_EMPTY(&queue->cam_doneq)) {
5276 queue->cam_doneq_sleep = 1;
5277 msleep(&queue->cam_doneq, &queue->cam_doneq_mtx,
5279 queue->cam_doneq_sleep = 0;
5281 STAILQ_CONCAT(&doneq, &queue->cam_doneq);
5282 mtx_unlock(&queue->cam_doneq_mtx);
5284 THREAD_NO_SLEEPING();
5285 while ((ccb_h = STAILQ_FIRST(&doneq)) != NULL) {
5286 STAILQ_REMOVE_HEAD(&doneq, sim_links.stqe);
5287 xpt_done_process(ccb_h);
5289 THREAD_SLEEPING_OK();
5291 mtx_lock(&queue->cam_doneq_mtx);
5296 camisr_runqueue(void)
5298 struct ccb_hdr *ccb_h;
5299 struct cam_doneq *queue;
5302 /* Process global queues. */
5303 for (i = 0; i < cam_num_doneqs; i++) {
5304 queue = &cam_doneqs[i];
5305 mtx_lock(&queue->cam_doneq_mtx);
5306 while ((ccb_h = STAILQ_FIRST(&queue->cam_doneq)) != NULL) {
5307 STAILQ_REMOVE_HEAD(&queue->cam_doneq, sim_links.stqe);
5308 mtx_unlock(&queue->cam_doneq_mtx);
5309 xpt_done_process(ccb_h);
5310 mtx_lock(&queue->cam_doneq_mtx);
5312 mtx_unlock(&queue->cam_doneq_mtx);