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 uint32_t xpt_generation;
98 /* number of high powered commands that can go through right now */
99 struct mtx xpt_highpower_lock;
100 STAILQ_HEAD(highpowerlist, cam_ed) highpowerq;
103 /* queue for handling async rescan requests. */
104 TAILQ_HEAD(, ccb_hdr) ccb_scanq;
106 int buses_config_done;
108 /* Registered busses */
109 TAILQ_HEAD(,cam_eb) xpt_busses;
110 u_int bus_generation;
112 struct intr_config_hook *xpt_config_hook;
115 struct callout boot_callout;
117 struct mtx xpt_topo_lock;
119 struct taskqueue *xpt_taskq;
124 DM_RET_FLAG_MASK = 0x0f,
127 DM_RET_DESCEND = 0x20,
129 DM_RET_ACTION_MASK = 0xf0
137 } xpt_traverse_depth;
139 struct xpt_traverse_config {
140 xpt_traverse_depth depth;
145 typedef int xpt_busfunc_t (struct cam_eb *bus, void *arg);
146 typedef int xpt_targetfunc_t (struct cam_et *target, void *arg);
147 typedef int xpt_devicefunc_t (struct cam_ed *device, void *arg);
148 typedef int xpt_periphfunc_t (struct cam_periph *periph, void *arg);
149 typedef int xpt_pdrvfunc_t (struct periph_driver **pdrv, void *arg);
151 /* Transport layer configuration information */
152 static struct xpt_softc xsoftc;
154 MTX_SYSINIT(xpt_topo_init, &xsoftc.xpt_topo_lock, "XPT topology lock", MTX_DEF);
156 SYSCTL_INT(_kern_cam, OID_AUTO, boot_delay, CTLFLAG_RDTUN,
157 &xsoftc.boot_delay, 0, "Bus registration wait time");
158 SYSCTL_UINT(_kern_cam, OID_AUTO, xpt_generation, CTLFLAG_RD,
159 &xsoftc.xpt_generation, 0, "CAM peripheral generation count");
162 struct mtx_padalign cam_doneq_mtx;
163 STAILQ_HEAD(, ccb_hdr) cam_doneq;
167 static struct cam_doneq cam_doneqs[MAXCPU];
168 static int cam_num_doneqs;
169 static struct proc *cam_proc;
171 SYSCTL_INT(_kern_cam, OID_AUTO, num_doneqs, CTLFLAG_RDTUN,
172 &cam_num_doneqs, 0, "Number of completion queues/threads");
174 struct cam_periph *xpt_periph;
176 static periph_init_t xpt_periph_init;
178 static struct periph_driver xpt_driver =
180 xpt_periph_init, "xpt",
181 TAILQ_HEAD_INITIALIZER(xpt_driver.units), /* generation */ 0,
185 PERIPHDRIVER_DECLARE(xpt, xpt_driver);
187 static d_open_t xptopen;
188 static d_close_t xptclose;
189 static d_ioctl_t xptioctl;
190 static d_ioctl_t xptdoioctl;
192 static struct cdevsw xpt_cdevsw = {
193 .d_version = D_VERSION,
201 /* Storage for debugging datastructures */
202 struct cam_path *cam_dpath;
203 u_int32_t cam_dflags = CAM_DEBUG_FLAGS;
204 SYSCTL_UINT(_kern_cam, OID_AUTO, dflags, CTLFLAG_RWTUN,
205 &cam_dflags, 0, "Enabled debug flags");
206 u_int32_t cam_debug_delay = CAM_DEBUG_DELAY;
207 SYSCTL_UINT(_kern_cam, OID_AUTO, debug_delay, CTLFLAG_RWTUN,
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, MAXPHYS);
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);
984 atomic_add_32(&xsoftc.xpt_generation, 1);
991 xpt_remove_periph(struct cam_periph *periph)
993 struct cam_ed *device;
995 device = periph->path->device;
996 if (device != NULL) {
997 mtx_lock(&device->target->bus->eb_mtx);
998 device->generation++;
999 SLIST_REMOVE(&device->periphs, periph, cam_periph, periph_links);
1000 mtx_unlock(&device->target->bus->eb_mtx);
1001 atomic_add_32(&xsoftc.xpt_generation, 1);
1007 xpt_announce_periph(struct cam_periph *periph, char *announce_string)
1009 struct cam_path *path = periph->path;
1011 cam_periph_assert(periph, MA_OWNED);
1012 periph->flags |= CAM_PERIPH_ANNOUNCED;
1014 printf("%s%d at %s%d bus %d scbus%d target %d lun %jx\n",
1015 periph->periph_name, periph->unit_number,
1016 path->bus->sim->sim_name,
1017 path->bus->sim->unit_number,
1018 path->bus->sim->bus_id,
1020 path->target->target_id,
1021 (uintmax_t)path->device->lun_id);
1022 printf("%s%d: ", periph->periph_name, periph->unit_number);
1023 if (path->device->protocol == PROTO_SCSI)
1024 scsi_print_inquiry(&path->device->inq_data);
1025 else if (path->device->protocol == PROTO_ATA ||
1026 path->device->protocol == PROTO_SATAPM)
1027 ata_print_ident(&path->device->ident_data);
1028 else if (path->device->protocol == PROTO_SEMB)
1030 (struct sep_identify_data *)&path->device->ident_data);
1032 printf("Unknown protocol device\n");
1033 if (path->device->serial_num_len > 0) {
1034 /* Don't wrap the screen - print only the first 60 chars */
1035 printf("%s%d: Serial Number %.60s\n", periph->periph_name,
1036 periph->unit_number, path->device->serial_num);
1038 /* Announce transport details. */
1039 (*(path->bus->xport->announce))(periph);
1040 /* Announce command queueing. */
1041 if (path->device->inq_flags & SID_CmdQue
1042 || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) {
1043 printf("%s%d: Command Queueing enabled\n",
1044 periph->periph_name, periph->unit_number);
1046 /* Announce caller's details if they've passed in. */
1047 if (announce_string != NULL)
1048 printf("%s%d: %s\n", periph->periph_name,
1049 periph->unit_number, announce_string);
1053 xpt_announce_quirks(struct cam_periph *periph, int quirks, char *bit_string)
1056 printf("%s%d: quirks=0x%b\n", periph->periph_name,
1057 periph->unit_number, quirks, bit_string);
1062 xpt_denounce_periph(struct cam_periph *periph)
1064 struct cam_path *path = periph->path;
1066 cam_periph_assert(periph, MA_OWNED);
1067 printf("%s%d at %s%d bus %d scbus%d target %d lun %jx\n",
1068 periph->periph_name, periph->unit_number,
1069 path->bus->sim->sim_name,
1070 path->bus->sim->unit_number,
1071 path->bus->sim->bus_id,
1073 path->target->target_id,
1074 (uintmax_t)path->device->lun_id);
1075 printf("%s%d: ", periph->periph_name, periph->unit_number);
1076 if (path->device->protocol == PROTO_SCSI)
1077 scsi_print_inquiry_short(&path->device->inq_data);
1078 else if (path->device->protocol == PROTO_ATA ||
1079 path->device->protocol == PROTO_SATAPM)
1080 ata_print_ident_short(&path->device->ident_data);
1081 else if (path->device->protocol == PROTO_SEMB)
1082 semb_print_ident_short(
1083 (struct sep_identify_data *)&path->device->ident_data);
1085 printf("Unknown protocol device");
1086 if (path->device->serial_num_len > 0)
1087 printf(" s/n %.60s", path->device->serial_num);
1088 printf(" detached\n");
1093 xpt_getattr(char *buf, size_t len, const char *attr, struct cam_path *path)
1096 struct ccb_dev_advinfo cdai;
1097 struct scsi_vpd_id_descriptor *idd;
1099 xpt_path_assert(path, MA_OWNED);
1101 memset(&cdai, 0, sizeof(cdai));
1102 xpt_setup_ccb(&cdai.ccb_h, path, CAM_PRIORITY_NORMAL);
1103 cdai.ccb_h.func_code = XPT_DEV_ADVINFO;
1106 if (!strcmp(attr, "GEOM::ident"))
1107 cdai.buftype = CDAI_TYPE_SERIAL_NUM;
1108 else if (!strcmp(attr, "GEOM::physpath"))
1109 cdai.buftype = CDAI_TYPE_PHYS_PATH;
1110 else if (strcmp(attr, "GEOM::lunid") == 0 ||
1111 strcmp(attr, "GEOM::lunname") == 0) {
1112 cdai.buftype = CDAI_TYPE_SCSI_DEVID;
1113 cdai.bufsiz = CAM_SCSI_DEVID_MAXLEN;
1117 cdai.buf = malloc(cdai.bufsiz, M_CAMXPT, M_NOWAIT|M_ZERO);
1118 if (cdai.buf == NULL) {
1122 xpt_action((union ccb *)&cdai); /* can only be synchronous */
1123 if ((cdai.ccb_h.status & CAM_DEV_QFRZN) != 0)
1124 cam_release_devq(cdai.ccb_h.path, 0, 0, 0, FALSE);
1125 if (cdai.provsiz == 0)
1127 if (cdai.buftype == CDAI_TYPE_SCSI_DEVID) {
1128 if (strcmp(attr, "GEOM::lunid") == 0) {
1129 idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf,
1130 cdai.provsiz, scsi_devid_is_lun_naa);
1132 idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf,
1133 cdai.provsiz, scsi_devid_is_lun_eui64);
1137 idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf,
1138 cdai.provsiz, scsi_devid_is_lun_t10);
1140 idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf,
1141 cdai.provsiz, scsi_devid_is_lun_name);
1145 if ((idd->proto_codeset & SVPD_ID_CODESET_MASK) == SVPD_ID_CODESET_ASCII) {
1146 if (idd->length < len) {
1147 for (l = 0; l < idd->length; l++)
1148 buf[l] = idd->identifier[l] ?
1149 idd->identifier[l] : ' ';
1153 } else if ((idd->proto_codeset & SVPD_ID_CODESET_MASK) == SVPD_ID_CODESET_UTF8) {
1154 l = strnlen(idd->identifier, idd->length);
1156 bcopy(idd->identifier, buf, l);
1161 if (idd->length * 2 < len) {
1162 for (l = 0; l < idd->length; l++)
1163 sprintf(buf + l * 2, "%02x",
1164 idd->identifier[l]);
1170 if (strlcpy(buf, cdai.buf, len) >= len)
1175 if (cdai.buf != NULL)
1176 free(cdai.buf, M_CAMXPT);
1180 static dev_match_ret
1181 xptbusmatch(struct dev_match_pattern *patterns, u_int num_patterns,
1184 dev_match_ret retval;
1187 retval = DM_RET_NONE;
1190 * If we aren't given something to match against, that's an error.
1193 return(DM_RET_ERROR);
1196 * If there are no match entries, then this bus matches no
1199 if ((patterns == NULL) || (num_patterns == 0))
1200 return(DM_RET_DESCEND | DM_RET_COPY);
1202 for (i = 0; i < num_patterns; i++) {
1203 struct bus_match_pattern *cur_pattern;
1206 * If the pattern in question isn't for a bus node, we
1207 * aren't interested. However, we do indicate to the
1208 * calling routine that we should continue descending the
1209 * tree, since the user wants to match against lower-level
1212 if (patterns[i].type != DEV_MATCH_BUS) {
1213 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1214 retval |= DM_RET_DESCEND;
1218 cur_pattern = &patterns[i].pattern.bus_pattern;
1221 * If they want to match any bus node, we give them any
1224 if (cur_pattern->flags == BUS_MATCH_ANY) {
1225 /* set the copy flag */
1226 retval |= DM_RET_COPY;
1229 * If we've already decided on an action, go ahead
1232 if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE)
1237 * Not sure why someone would do this...
1239 if (cur_pattern->flags == BUS_MATCH_NONE)
1242 if (((cur_pattern->flags & BUS_MATCH_PATH) != 0)
1243 && (cur_pattern->path_id != bus->path_id))
1246 if (((cur_pattern->flags & BUS_MATCH_BUS_ID) != 0)
1247 && (cur_pattern->bus_id != bus->sim->bus_id))
1250 if (((cur_pattern->flags & BUS_MATCH_UNIT) != 0)
1251 && (cur_pattern->unit_number != bus->sim->unit_number))
1254 if (((cur_pattern->flags & BUS_MATCH_NAME) != 0)
1255 && (strncmp(cur_pattern->dev_name, bus->sim->sim_name,
1260 * If we get to this point, the user definitely wants
1261 * information on this bus. So tell the caller to copy the
1264 retval |= DM_RET_COPY;
1267 * If the return action has been set to descend, then we
1268 * know that we've already seen a non-bus matching
1269 * expression, therefore we need to further descend the tree.
1270 * This won't change by continuing around the loop, so we
1271 * go ahead and return. If we haven't seen a non-bus
1272 * matching expression, we keep going around the loop until
1273 * we exhaust the matching expressions. We'll set the stop
1274 * flag once we fall out of the loop.
1276 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND)
1281 * If the return action hasn't been set to descend yet, that means
1282 * we haven't seen anything other than bus matching patterns. So
1283 * tell the caller to stop descending the tree -- the user doesn't
1284 * want to match against lower level tree elements.
1286 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1287 retval |= DM_RET_STOP;
1292 static dev_match_ret
1293 xptdevicematch(struct dev_match_pattern *patterns, u_int num_patterns,
1294 struct cam_ed *device)
1296 dev_match_ret retval;
1299 retval = DM_RET_NONE;
1302 * If we aren't given something to match against, that's an error.
1305 return(DM_RET_ERROR);
1308 * If there are no match entries, then this device matches no
1311 if ((patterns == NULL) || (num_patterns == 0))
1312 return(DM_RET_DESCEND | DM_RET_COPY);
1314 for (i = 0; i < num_patterns; i++) {
1315 struct device_match_pattern *cur_pattern;
1316 struct scsi_vpd_device_id *device_id_page;
1319 * If the pattern in question isn't for a device node, we
1320 * aren't interested.
1322 if (patterns[i].type != DEV_MATCH_DEVICE) {
1323 if ((patterns[i].type == DEV_MATCH_PERIPH)
1324 && ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE))
1325 retval |= DM_RET_DESCEND;
1329 cur_pattern = &patterns[i].pattern.device_pattern;
1331 /* Error out if mutually exclusive options are specified. */
1332 if ((cur_pattern->flags & (DEV_MATCH_INQUIRY|DEV_MATCH_DEVID))
1333 == (DEV_MATCH_INQUIRY|DEV_MATCH_DEVID))
1334 return(DM_RET_ERROR);
1337 * If they want to match any device node, we give them any
1340 if (cur_pattern->flags == DEV_MATCH_ANY)
1344 * Not sure why someone would do this...
1346 if (cur_pattern->flags == DEV_MATCH_NONE)
1349 if (((cur_pattern->flags & DEV_MATCH_PATH) != 0)
1350 && (cur_pattern->path_id != device->target->bus->path_id))
1353 if (((cur_pattern->flags & DEV_MATCH_TARGET) != 0)
1354 && (cur_pattern->target_id != device->target->target_id))
1357 if (((cur_pattern->flags & DEV_MATCH_LUN) != 0)
1358 && (cur_pattern->target_lun != device->lun_id))
1361 if (((cur_pattern->flags & DEV_MATCH_INQUIRY) != 0)
1362 && (cam_quirkmatch((caddr_t)&device->inq_data,
1363 (caddr_t)&cur_pattern->data.inq_pat,
1364 1, sizeof(cur_pattern->data.inq_pat),
1365 scsi_static_inquiry_match) == NULL))
1368 device_id_page = (struct scsi_vpd_device_id *)device->device_id;
1369 if (((cur_pattern->flags & DEV_MATCH_DEVID) != 0)
1370 && (device->device_id_len < SVPD_DEVICE_ID_HDR_LEN
1371 || scsi_devid_match((uint8_t *)device_id_page->desc_list,
1372 device->device_id_len
1373 - SVPD_DEVICE_ID_HDR_LEN,
1374 cur_pattern->data.devid_pat.id,
1375 cur_pattern->data.devid_pat.id_len) != 0))
1380 * If we get to this point, the user definitely wants
1381 * information on this device. So tell the caller to copy
1384 retval |= DM_RET_COPY;
1387 * If the return action has been set to descend, then we
1388 * know that we've already seen a peripheral matching
1389 * expression, therefore we need to further descend the tree.
1390 * This won't change by continuing around the loop, so we
1391 * go ahead and return. If we haven't seen a peripheral
1392 * matching expression, we keep going around the loop until
1393 * we exhaust the matching expressions. We'll set the stop
1394 * flag once we fall out of the loop.
1396 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND)
1401 * If the return action hasn't been set to descend yet, that means
1402 * we haven't seen any peripheral matching patterns. So tell the
1403 * caller to stop descending the tree -- the user doesn't want to
1404 * match against lower level tree elements.
1406 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1407 retval |= DM_RET_STOP;
1413 * Match a single peripheral against any number of match patterns.
1415 static dev_match_ret
1416 xptperiphmatch(struct dev_match_pattern *patterns, u_int num_patterns,
1417 struct cam_periph *periph)
1419 dev_match_ret retval;
1423 * If we aren't given something to match against, that's an error.
1426 return(DM_RET_ERROR);
1429 * If there are no match entries, then this peripheral matches no
1432 if ((patterns == NULL) || (num_patterns == 0))
1433 return(DM_RET_STOP | DM_RET_COPY);
1436 * There aren't any nodes below a peripheral node, so there's no
1437 * reason to descend the tree any further.
1439 retval = DM_RET_STOP;
1441 for (i = 0; i < num_patterns; i++) {
1442 struct periph_match_pattern *cur_pattern;
1445 * If the pattern in question isn't for a peripheral, we
1446 * aren't interested.
1448 if (patterns[i].type != DEV_MATCH_PERIPH)
1451 cur_pattern = &patterns[i].pattern.periph_pattern;
1454 * If they want to match on anything, then we will do so.
1456 if (cur_pattern->flags == PERIPH_MATCH_ANY) {
1457 /* set the copy flag */
1458 retval |= DM_RET_COPY;
1461 * We've already set the return action to stop,
1462 * since there are no nodes below peripherals in
1469 * Not sure why someone would do this...
1471 if (cur_pattern->flags == PERIPH_MATCH_NONE)
1474 if (((cur_pattern->flags & PERIPH_MATCH_PATH) != 0)
1475 && (cur_pattern->path_id != periph->path->bus->path_id))
1479 * For the target and lun id's, we have to make sure the
1480 * target and lun pointers aren't NULL. The xpt peripheral
1481 * has a wildcard target and device.
1483 if (((cur_pattern->flags & PERIPH_MATCH_TARGET) != 0)
1484 && ((periph->path->target == NULL)
1485 ||(cur_pattern->target_id != periph->path->target->target_id)))
1488 if (((cur_pattern->flags & PERIPH_MATCH_LUN) != 0)
1489 && ((periph->path->device == NULL)
1490 || (cur_pattern->target_lun != periph->path->device->lun_id)))
1493 if (((cur_pattern->flags & PERIPH_MATCH_UNIT) != 0)
1494 && (cur_pattern->unit_number != periph->unit_number))
1497 if (((cur_pattern->flags & PERIPH_MATCH_NAME) != 0)
1498 && (strncmp(cur_pattern->periph_name, periph->periph_name,
1503 * If we get to this point, the user definitely wants
1504 * information on this peripheral. So tell the caller to
1505 * copy the data out.
1507 retval |= DM_RET_COPY;
1510 * The return action has already been set to stop, since
1511 * peripherals don't have any nodes below them in the EDT.
1517 * If we get to this point, the peripheral that was passed in
1518 * doesn't match any of the patterns.
1524 xptedtbusfunc(struct cam_eb *bus, void *arg)
1526 struct ccb_dev_match *cdm;
1527 struct cam_et *target;
1528 dev_match_ret retval;
1530 cdm = (struct ccb_dev_match *)arg;
1533 * If our position is for something deeper in the tree, that means
1534 * that we've already seen this node. So, we keep going down.
1536 if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1537 && (cdm->pos.cookie.bus == bus)
1538 && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1539 && (cdm->pos.cookie.target != NULL))
1540 retval = DM_RET_DESCEND;
1542 retval = xptbusmatch(cdm->patterns, cdm->num_patterns, bus);
1545 * If we got an error, bail out of the search.
1547 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1548 cdm->status = CAM_DEV_MATCH_ERROR;
1553 * If the copy flag is set, copy this bus out.
1555 if (retval & DM_RET_COPY) {
1558 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1559 sizeof(struct dev_match_result));
1562 * If we don't have enough space to put in another
1563 * match result, save our position and tell the
1564 * user there are more devices to check.
1566 if (spaceleft < sizeof(struct dev_match_result)) {
1567 bzero(&cdm->pos, sizeof(cdm->pos));
1568 cdm->pos.position_type =
1569 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS;
1571 cdm->pos.cookie.bus = bus;
1572 cdm->pos.generations[CAM_BUS_GENERATION]=
1573 xsoftc.bus_generation;
1574 cdm->status = CAM_DEV_MATCH_MORE;
1577 j = cdm->num_matches;
1579 cdm->matches[j].type = DEV_MATCH_BUS;
1580 cdm->matches[j].result.bus_result.path_id = bus->path_id;
1581 cdm->matches[j].result.bus_result.bus_id = bus->sim->bus_id;
1582 cdm->matches[j].result.bus_result.unit_number =
1583 bus->sim->unit_number;
1584 strncpy(cdm->matches[j].result.bus_result.dev_name,
1585 bus->sim->sim_name, DEV_IDLEN);
1589 * If the user is only interested in busses, there's no
1590 * reason to descend to the next level in the tree.
1592 if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP)
1596 * If there is a target generation recorded, check it to
1597 * make sure the target list hasn't changed.
1599 mtx_lock(&bus->eb_mtx);
1600 if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1601 && (cdm->pos.cookie.bus == bus)
1602 && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1603 && (cdm->pos.cookie.target != NULL)) {
1604 if ((cdm->pos.generations[CAM_TARGET_GENERATION] !=
1606 mtx_unlock(&bus->eb_mtx);
1607 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1610 target = (struct cam_et *)cdm->pos.cookie.target;
1614 mtx_unlock(&bus->eb_mtx);
1616 return (xpttargettraverse(bus, target, xptedttargetfunc, arg));
1620 xptedttargetfunc(struct cam_et *target, void *arg)
1622 struct ccb_dev_match *cdm;
1624 struct cam_ed *device;
1626 cdm = (struct ccb_dev_match *)arg;
1630 * If there is a device list generation recorded, check it to
1631 * make sure the device list hasn't changed.
1633 mtx_lock(&bus->eb_mtx);
1634 if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1635 && (cdm->pos.cookie.bus == bus)
1636 && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1637 && (cdm->pos.cookie.target == target)
1638 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1639 && (cdm->pos.cookie.device != NULL)) {
1640 if (cdm->pos.generations[CAM_DEV_GENERATION] !=
1641 target->generation) {
1642 mtx_unlock(&bus->eb_mtx);
1643 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1646 device = (struct cam_ed *)cdm->pos.cookie.device;
1650 mtx_unlock(&bus->eb_mtx);
1652 return (xptdevicetraverse(target, device, xptedtdevicefunc, arg));
1656 xptedtdevicefunc(struct cam_ed *device, void *arg)
1659 struct cam_periph *periph;
1660 struct ccb_dev_match *cdm;
1661 dev_match_ret retval;
1663 cdm = (struct ccb_dev_match *)arg;
1664 bus = device->target->bus;
1667 * If our position is for something deeper in the tree, that means
1668 * that we've already seen this node. So, we keep going down.
1670 if ((cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1671 && (cdm->pos.cookie.device == device)
1672 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
1673 && (cdm->pos.cookie.periph != NULL))
1674 retval = DM_RET_DESCEND;
1676 retval = xptdevicematch(cdm->patterns, cdm->num_patterns,
1679 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1680 cdm->status = CAM_DEV_MATCH_ERROR;
1685 * If the copy flag is set, copy this device out.
1687 if (retval & DM_RET_COPY) {
1690 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1691 sizeof(struct dev_match_result));
1694 * If we don't have enough space to put in another
1695 * match result, save our position and tell the
1696 * user there are more devices to check.
1698 if (spaceleft < sizeof(struct dev_match_result)) {
1699 bzero(&cdm->pos, sizeof(cdm->pos));
1700 cdm->pos.position_type =
1701 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS |
1702 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE;
1704 cdm->pos.cookie.bus = device->target->bus;
1705 cdm->pos.generations[CAM_BUS_GENERATION]=
1706 xsoftc.bus_generation;
1707 cdm->pos.cookie.target = device->target;
1708 cdm->pos.generations[CAM_TARGET_GENERATION] =
1709 device->target->bus->generation;
1710 cdm->pos.cookie.device = device;
1711 cdm->pos.generations[CAM_DEV_GENERATION] =
1712 device->target->generation;
1713 cdm->status = CAM_DEV_MATCH_MORE;
1716 j = cdm->num_matches;
1718 cdm->matches[j].type = DEV_MATCH_DEVICE;
1719 cdm->matches[j].result.device_result.path_id =
1720 device->target->bus->path_id;
1721 cdm->matches[j].result.device_result.target_id =
1722 device->target->target_id;
1723 cdm->matches[j].result.device_result.target_lun =
1725 cdm->matches[j].result.device_result.protocol =
1727 bcopy(&device->inq_data,
1728 &cdm->matches[j].result.device_result.inq_data,
1729 sizeof(struct scsi_inquiry_data));
1730 bcopy(&device->ident_data,
1731 &cdm->matches[j].result.device_result.ident_data,
1732 sizeof(struct ata_params));
1734 /* Let the user know whether this device is unconfigured */
1735 if (device->flags & CAM_DEV_UNCONFIGURED)
1736 cdm->matches[j].result.device_result.flags =
1737 DEV_RESULT_UNCONFIGURED;
1739 cdm->matches[j].result.device_result.flags =
1744 * If the user isn't interested in peripherals, don't descend
1745 * the tree any further.
1747 if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP)
1751 * If there is a peripheral list generation recorded, make sure
1752 * it hasn't changed.
1755 mtx_lock(&bus->eb_mtx);
1756 if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1757 && (cdm->pos.cookie.bus == bus)
1758 && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1759 && (cdm->pos.cookie.target == device->target)
1760 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1761 && (cdm->pos.cookie.device == device)
1762 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
1763 && (cdm->pos.cookie.periph != NULL)) {
1764 if (cdm->pos.generations[CAM_PERIPH_GENERATION] !=
1765 device->generation) {
1766 mtx_unlock(&bus->eb_mtx);
1768 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1771 periph = (struct cam_periph *)cdm->pos.cookie.periph;
1775 mtx_unlock(&bus->eb_mtx);
1778 return (xptperiphtraverse(device, periph, xptedtperiphfunc, arg));
1782 xptedtperiphfunc(struct cam_periph *periph, void *arg)
1784 struct ccb_dev_match *cdm;
1785 dev_match_ret retval;
1787 cdm = (struct ccb_dev_match *)arg;
1789 retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph);
1791 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1792 cdm->status = CAM_DEV_MATCH_ERROR;
1797 * If the copy flag is set, copy this peripheral out.
1799 if (retval & DM_RET_COPY) {
1802 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1803 sizeof(struct dev_match_result));
1806 * If we don't have enough space to put in another
1807 * match result, save our position and tell the
1808 * user there are more devices to check.
1810 if (spaceleft < sizeof(struct dev_match_result)) {
1811 bzero(&cdm->pos, sizeof(cdm->pos));
1812 cdm->pos.position_type =
1813 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS |
1814 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE |
1817 cdm->pos.cookie.bus = periph->path->bus;
1818 cdm->pos.generations[CAM_BUS_GENERATION]=
1819 xsoftc.bus_generation;
1820 cdm->pos.cookie.target = periph->path->target;
1821 cdm->pos.generations[CAM_TARGET_GENERATION] =
1822 periph->path->bus->generation;
1823 cdm->pos.cookie.device = periph->path->device;
1824 cdm->pos.generations[CAM_DEV_GENERATION] =
1825 periph->path->target->generation;
1826 cdm->pos.cookie.periph = periph;
1827 cdm->pos.generations[CAM_PERIPH_GENERATION] =
1828 periph->path->device->generation;
1829 cdm->status = CAM_DEV_MATCH_MORE;
1833 j = cdm->num_matches;
1835 cdm->matches[j].type = DEV_MATCH_PERIPH;
1836 cdm->matches[j].result.periph_result.path_id =
1837 periph->path->bus->path_id;
1838 cdm->matches[j].result.periph_result.target_id =
1839 periph->path->target->target_id;
1840 cdm->matches[j].result.periph_result.target_lun =
1841 periph->path->device->lun_id;
1842 cdm->matches[j].result.periph_result.unit_number =
1843 periph->unit_number;
1844 strncpy(cdm->matches[j].result.periph_result.periph_name,
1845 periph->periph_name, DEV_IDLEN);
1852 xptedtmatch(struct ccb_dev_match *cdm)
1857 cdm->num_matches = 0;
1860 * Check the bus list generation. If it has changed, the user
1861 * needs to reset everything and start over.
1864 if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1865 && (cdm->pos.cookie.bus != NULL)) {
1866 if (cdm->pos.generations[CAM_BUS_GENERATION] !=
1867 xsoftc.bus_generation) {
1869 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1872 bus = (struct cam_eb *)cdm->pos.cookie.bus;
1878 ret = xptbustraverse(bus, xptedtbusfunc, cdm);
1881 * If we get back 0, that means that we had to stop before fully
1882 * traversing the EDT. It also means that one of the subroutines
1883 * has set the status field to the proper value. If we get back 1,
1884 * we've fully traversed the EDT and copied out any matching entries.
1887 cdm->status = CAM_DEV_MATCH_LAST;
1893 xptplistpdrvfunc(struct periph_driver **pdrv, void *arg)
1895 struct cam_periph *periph;
1896 struct ccb_dev_match *cdm;
1898 cdm = (struct ccb_dev_match *)arg;
1901 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
1902 && (cdm->pos.cookie.pdrv == pdrv)
1903 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
1904 && (cdm->pos.cookie.periph != NULL)) {
1905 if (cdm->pos.generations[CAM_PERIPH_GENERATION] !=
1906 (*pdrv)->generation) {
1908 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1911 periph = (struct cam_periph *)cdm->pos.cookie.periph;
1917 return (xptpdperiphtraverse(pdrv, periph, xptplistperiphfunc, arg));
1921 xptplistperiphfunc(struct cam_periph *periph, void *arg)
1923 struct ccb_dev_match *cdm;
1924 dev_match_ret retval;
1926 cdm = (struct ccb_dev_match *)arg;
1928 retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph);
1930 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1931 cdm->status = CAM_DEV_MATCH_ERROR;
1936 * If the copy flag is set, copy this peripheral out.
1938 if (retval & DM_RET_COPY) {
1941 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1942 sizeof(struct dev_match_result));
1945 * If we don't have enough space to put in another
1946 * match result, save our position and tell the
1947 * user there are more devices to check.
1949 if (spaceleft < sizeof(struct dev_match_result)) {
1950 struct periph_driver **pdrv;
1953 bzero(&cdm->pos, sizeof(cdm->pos));
1954 cdm->pos.position_type =
1955 CAM_DEV_POS_PDRV | CAM_DEV_POS_PDPTR |
1959 * This may look a bit non-sensical, but it is
1960 * actually quite logical. There are very few
1961 * peripheral drivers, and bloating every peripheral
1962 * structure with a pointer back to its parent
1963 * peripheral driver linker set entry would cost
1964 * more in the long run than doing this quick lookup.
1966 for (pdrv = periph_drivers; *pdrv != NULL; pdrv++) {
1967 if (strcmp((*pdrv)->driver_name,
1968 periph->periph_name) == 0)
1972 if (*pdrv == NULL) {
1973 cdm->status = CAM_DEV_MATCH_ERROR;
1977 cdm->pos.cookie.pdrv = pdrv;
1979 * The periph generation slot does double duty, as
1980 * does the periph pointer slot. They are used for
1981 * both edt and pdrv lookups and positioning.
1983 cdm->pos.cookie.periph = periph;
1984 cdm->pos.generations[CAM_PERIPH_GENERATION] =
1985 (*pdrv)->generation;
1986 cdm->status = CAM_DEV_MATCH_MORE;
1990 j = cdm->num_matches;
1992 cdm->matches[j].type = DEV_MATCH_PERIPH;
1993 cdm->matches[j].result.periph_result.path_id =
1994 periph->path->bus->path_id;
1997 * The transport layer peripheral doesn't have a target or
2000 if (periph->path->target)
2001 cdm->matches[j].result.periph_result.target_id =
2002 periph->path->target->target_id;
2004 cdm->matches[j].result.periph_result.target_id =
2005 CAM_TARGET_WILDCARD;
2007 if (periph->path->device)
2008 cdm->matches[j].result.periph_result.target_lun =
2009 periph->path->device->lun_id;
2011 cdm->matches[j].result.periph_result.target_lun =
2014 cdm->matches[j].result.periph_result.unit_number =
2015 periph->unit_number;
2016 strncpy(cdm->matches[j].result.periph_result.periph_name,
2017 periph->periph_name, DEV_IDLEN);
2024 xptperiphlistmatch(struct ccb_dev_match *cdm)
2028 cdm->num_matches = 0;
2031 * At this point in the edt traversal function, we check the bus
2032 * list generation to make sure that no busses have been added or
2033 * removed since the user last sent a XPT_DEV_MATCH ccb through.
2034 * For the peripheral driver list traversal function, however, we
2035 * don't have to worry about new peripheral driver types coming or
2036 * going; they're in a linker set, and therefore can't change
2037 * without a recompile.
2040 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
2041 && (cdm->pos.cookie.pdrv != NULL))
2042 ret = xptpdrvtraverse(
2043 (struct periph_driver **)cdm->pos.cookie.pdrv,
2044 xptplistpdrvfunc, cdm);
2046 ret = xptpdrvtraverse(NULL, xptplistpdrvfunc, cdm);
2049 * If we get back 0, that means that we had to stop before fully
2050 * traversing the peripheral driver tree. It also means that one of
2051 * the subroutines has set the status field to the proper value. If
2052 * we get back 1, we've fully traversed the EDT and copied out any
2056 cdm->status = CAM_DEV_MATCH_LAST;
2062 xptbustraverse(struct cam_eb *start_bus, xpt_busfunc_t *tr_func, void *arg)
2064 struct cam_eb *bus, *next_bus;
2072 bus = TAILQ_FIRST(&xsoftc.xpt_busses);
2080 for (; bus != NULL; bus = next_bus) {
2081 retval = tr_func(bus, arg);
2083 xpt_release_bus(bus);
2087 next_bus = TAILQ_NEXT(bus, links);
2089 next_bus->refcount++;
2091 xpt_release_bus(bus);
2097 xpttargettraverse(struct cam_eb *bus, struct cam_et *start_target,
2098 xpt_targetfunc_t *tr_func, void *arg)
2100 struct cam_et *target, *next_target;
2105 target = start_target;
2107 mtx_lock(&bus->eb_mtx);
2108 target = TAILQ_FIRST(&bus->et_entries);
2109 if (target == NULL) {
2110 mtx_unlock(&bus->eb_mtx);
2114 mtx_unlock(&bus->eb_mtx);
2116 for (; target != NULL; target = next_target) {
2117 retval = tr_func(target, arg);
2119 xpt_release_target(target);
2122 mtx_lock(&bus->eb_mtx);
2123 next_target = TAILQ_NEXT(target, links);
2125 next_target->refcount++;
2126 mtx_unlock(&bus->eb_mtx);
2127 xpt_release_target(target);
2133 xptdevicetraverse(struct cam_et *target, struct cam_ed *start_device,
2134 xpt_devicefunc_t *tr_func, void *arg)
2137 struct cam_ed *device, *next_device;
2143 device = start_device;
2145 mtx_lock(&bus->eb_mtx);
2146 device = TAILQ_FIRST(&target->ed_entries);
2147 if (device == NULL) {
2148 mtx_unlock(&bus->eb_mtx);
2152 mtx_unlock(&bus->eb_mtx);
2154 for (; device != NULL; device = next_device) {
2155 mtx_lock(&device->device_mtx);
2156 retval = tr_func(device, arg);
2157 mtx_unlock(&device->device_mtx);
2159 xpt_release_device(device);
2162 mtx_lock(&bus->eb_mtx);
2163 next_device = TAILQ_NEXT(device, links);
2165 next_device->refcount++;
2166 mtx_unlock(&bus->eb_mtx);
2167 xpt_release_device(device);
2173 xptperiphtraverse(struct cam_ed *device, struct cam_periph *start_periph,
2174 xpt_periphfunc_t *tr_func, void *arg)
2177 struct cam_periph *periph, *next_periph;
2182 bus = device->target->bus;
2184 periph = start_periph;
2187 mtx_lock(&bus->eb_mtx);
2188 periph = SLIST_FIRST(&device->periphs);
2189 while (periph != NULL && (periph->flags & CAM_PERIPH_FREE) != 0)
2190 periph = SLIST_NEXT(periph, periph_links);
2191 if (periph == NULL) {
2192 mtx_unlock(&bus->eb_mtx);
2197 mtx_unlock(&bus->eb_mtx);
2200 for (; periph != NULL; periph = next_periph) {
2201 retval = tr_func(periph, arg);
2203 cam_periph_release_locked(periph);
2207 mtx_lock(&bus->eb_mtx);
2208 next_periph = SLIST_NEXT(periph, periph_links);
2209 while (next_periph != NULL &&
2210 (next_periph->flags & CAM_PERIPH_FREE) != 0)
2211 next_periph = SLIST_NEXT(next_periph, periph_links);
2213 next_periph->refcount++;
2214 mtx_unlock(&bus->eb_mtx);
2216 cam_periph_release_locked(periph);
2222 xptpdrvtraverse(struct periph_driver **start_pdrv,
2223 xpt_pdrvfunc_t *tr_func, void *arg)
2225 struct periph_driver **pdrv;
2231 * We don't traverse the peripheral driver list like we do the
2232 * other lists, because it is a linker set, and therefore cannot be
2233 * changed during runtime. If the peripheral driver list is ever
2234 * re-done to be something other than a linker set (i.e. it can
2235 * change while the system is running), the list traversal should
2236 * be modified to work like the other traversal functions.
2238 for (pdrv = (start_pdrv ? start_pdrv : periph_drivers);
2239 *pdrv != NULL; pdrv++) {
2240 retval = tr_func(pdrv, arg);
2250 xptpdperiphtraverse(struct periph_driver **pdrv,
2251 struct cam_periph *start_periph,
2252 xpt_periphfunc_t *tr_func, void *arg)
2254 struct cam_periph *periph, *next_periph;
2260 periph = start_periph;
2263 periph = TAILQ_FIRST(&(*pdrv)->units);
2264 while (periph != NULL && (periph->flags & CAM_PERIPH_FREE) != 0)
2265 periph = TAILQ_NEXT(periph, unit_links);
2266 if (periph == NULL) {
2273 for (; periph != NULL; periph = next_periph) {
2274 cam_periph_lock(periph);
2275 retval = tr_func(periph, arg);
2276 cam_periph_unlock(periph);
2278 cam_periph_release(periph);
2282 next_periph = TAILQ_NEXT(periph, unit_links);
2283 while (next_periph != NULL &&
2284 (next_periph->flags & CAM_PERIPH_FREE) != 0)
2285 next_periph = TAILQ_NEXT(next_periph, unit_links);
2287 next_periph->refcount++;
2289 cam_periph_release(periph);
2295 xptdefbusfunc(struct cam_eb *bus, void *arg)
2297 struct xpt_traverse_config *tr_config;
2299 tr_config = (struct xpt_traverse_config *)arg;
2301 if (tr_config->depth == XPT_DEPTH_BUS) {
2302 xpt_busfunc_t *tr_func;
2304 tr_func = (xpt_busfunc_t *)tr_config->tr_func;
2306 return(tr_func(bus, tr_config->tr_arg));
2308 return(xpttargettraverse(bus, NULL, xptdeftargetfunc, arg));
2312 xptdeftargetfunc(struct cam_et *target, void *arg)
2314 struct xpt_traverse_config *tr_config;
2316 tr_config = (struct xpt_traverse_config *)arg;
2318 if (tr_config->depth == XPT_DEPTH_TARGET) {
2319 xpt_targetfunc_t *tr_func;
2321 tr_func = (xpt_targetfunc_t *)tr_config->tr_func;
2323 return(tr_func(target, tr_config->tr_arg));
2325 return(xptdevicetraverse(target, NULL, xptdefdevicefunc, arg));
2329 xptdefdevicefunc(struct cam_ed *device, void *arg)
2331 struct xpt_traverse_config *tr_config;
2333 tr_config = (struct xpt_traverse_config *)arg;
2335 if (tr_config->depth == XPT_DEPTH_DEVICE) {
2336 xpt_devicefunc_t *tr_func;
2338 tr_func = (xpt_devicefunc_t *)tr_config->tr_func;
2340 return(tr_func(device, tr_config->tr_arg));
2342 return(xptperiphtraverse(device, NULL, xptdefperiphfunc, arg));
2346 xptdefperiphfunc(struct cam_periph *periph, void *arg)
2348 struct xpt_traverse_config *tr_config;
2349 xpt_periphfunc_t *tr_func;
2351 tr_config = (struct xpt_traverse_config *)arg;
2353 tr_func = (xpt_periphfunc_t *)tr_config->tr_func;
2356 * Unlike the other default functions, we don't check for depth
2357 * here. The peripheral driver level is the last level in the EDT,
2358 * so if we're here, we should execute the function in question.
2360 return(tr_func(periph, tr_config->tr_arg));
2364 * Execute the given function for every bus in the EDT.
2367 xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg)
2369 struct xpt_traverse_config tr_config;
2371 tr_config.depth = XPT_DEPTH_BUS;
2372 tr_config.tr_func = tr_func;
2373 tr_config.tr_arg = arg;
2375 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2379 * Execute the given function for every device in the EDT.
2382 xpt_for_all_devices(xpt_devicefunc_t *tr_func, void *arg)
2384 struct xpt_traverse_config tr_config;
2386 tr_config.depth = XPT_DEPTH_DEVICE;
2387 tr_config.tr_func = tr_func;
2388 tr_config.tr_arg = arg;
2390 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2394 xptsetasyncfunc(struct cam_ed *device, void *arg)
2396 struct cam_path path;
2397 struct ccb_getdev cgd;
2398 struct ccb_setasync *csa = (struct ccb_setasync *)arg;
2401 * Don't report unconfigured devices (Wildcard devs,
2402 * devices only for target mode, device instances
2403 * that have been invalidated but are waiting for
2404 * their last reference count to be released).
2406 if ((device->flags & CAM_DEV_UNCONFIGURED) != 0)
2409 xpt_compile_path(&path,
2411 device->target->bus->path_id,
2412 device->target->target_id,
2414 xpt_setup_ccb(&cgd.ccb_h, &path, CAM_PRIORITY_NORMAL);
2415 cgd.ccb_h.func_code = XPT_GDEV_TYPE;
2416 xpt_action((union ccb *)&cgd);
2417 csa->callback(csa->callback_arg,
2420 xpt_release_path(&path);
2426 xptsetasyncbusfunc(struct cam_eb *bus, void *arg)
2428 struct cam_path path;
2429 struct ccb_pathinq cpi;
2430 struct ccb_setasync *csa = (struct ccb_setasync *)arg;
2432 xpt_compile_path(&path, /*periph*/NULL,
2434 CAM_TARGET_WILDCARD,
2436 xpt_path_lock(&path);
2437 xpt_setup_ccb(&cpi.ccb_h, &path, CAM_PRIORITY_NORMAL);
2438 cpi.ccb_h.func_code = XPT_PATH_INQ;
2439 xpt_action((union ccb *)&cpi);
2440 csa->callback(csa->callback_arg,
2443 xpt_path_unlock(&path);
2444 xpt_release_path(&path);
2450 xpt_action(union ccb *start_ccb)
2453 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE,
2454 ("xpt_action: func=%#x\n", start_ccb->ccb_h.func_code));
2456 start_ccb->ccb_h.status = CAM_REQ_INPROG;
2457 (*(start_ccb->ccb_h.path->bus->xport->action))(start_ccb);
2461 xpt_action_default(union ccb *start_ccb)
2463 struct cam_path *path;
2464 struct cam_sim *sim;
2467 path = start_ccb->ccb_h.path;
2468 CAM_DEBUG(path, CAM_DEBUG_TRACE,
2469 ("xpt_action_default: func=%#x\n", start_ccb->ccb_h.func_code));
2471 switch (start_ccb->ccb_h.func_code) {
2474 struct cam_ed *device;
2477 * For the sake of compatibility with SCSI-1
2478 * devices that may not understand the identify
2479 * message, we include lun information in the
2480 * second byte of all commands. SCSI-1 specifies
2481 * that luns are a 3 bit value and reserves only 3
2482 * bits for lun information in the CDB. Later
2483 * revisions of the SCSI spec allow for more than 8
2484 * luns, but have deprecated lun information in the
2485 * CDB. So, if the lun won't fit, we must omit.
2487 * Also be aware that during initial probing for devices,
2488 * the inquiry information is unknown but initialized to 0.
2489 * This means that this code will be exercised while probing
2490 * devices with an ANSI revision greater than 2.
2492 device = path->device;
2493 if (device->protocol_version <= SCSI_REV_2
2494 && start_ccb->ccb_h.target_lun < 8
2495 && (start_ccb->ccb_h.flags & CAM_CDB_POINTER) == 0) {
2497 start_ccb->csio.cdb_io.cdb_bytes[1] |=
2498 start_ccb->ccb_h.target_lun << 5;
2500 start_ccb->csio.scsi_status = SCSI_STATUS_OK;
2504 case XPT_CONT_TARGET_IO:
2505 start_ccb->csio.sense_resid = 0;
2506 start_ccb->csio.resid = 0;
2509 if (start_ccb->ccb_h.func_code == XPT_ATA_IO)
2510 start_ccb->ataio.resid = 0;
2516 struct cam_devq *devq;
2518 devq = path->bus->sim->devq;
2519 mtx_lock(&devq->send_mtx);
2520 cam_ccbq_insert_ccb(&path->device->ccbq, start_ccb);
2521 if (xpt_schedule_devq(devq, path->device) != 0)
2523 mtx_unlock(&devq->send_mtx);
2526 case XPT_CALC_GEOMETRY:
2527 /* Filter out garbage */
2528 if (start_ccb->ccg.block_size == 0
2529 || start_ccb->ccg.volume_size == 0) {
2530 start_ccb->ccg.cylinders = 0;
2531 start_ccb->ccg.heads = 0;
2532 start_ccb->ccg.secs_per_track = 0;
2533 start_ccb->ccb_h.status = CAM_REQ_CMP;
2536 #if defined(PC98) || defined(__sparc64__)
2538 * In a PC-98 system, geometry translation depens on
2539 * the "real" device geometry obtained from mode page 4.
2540 * SCSI geometry translation is performed in the
2541 * initialization routine of the SCSI BIOS and the result
2542 * stored in host memory. If the translation is available
2543 * in host memory, use it. If not, rely on the default
2544 * translation the device driver performs.
2545 * For sparc64, we may need adjust the geometry of large
2546 * disks in order to fit the limitations of the 16-bit
2547 * fields of the VTOC8 disk label.
2549 if (scsi_da_bios_params(&start_ccb->ccg) != 0) {
2550 start_ccb->ccb_h.status = CAM_REQ_CMP;
2557 union ccb* abort_ccb;
2559 abort_ccb = start_ccb->cab.abort_ccb;
2560 if (XPT_FC_IS_DEV_QUEUED(abort_ccb)) {
2562 if (abort_ccb->ccb_h.pinfo.index >= 0) {
2563 struct cam_ccbq *ccbq;
2564 struct cam_ed *device;
2566 device = abort_ccb->ccb_h.path->device;
2567 ccbq = &device->ccbq;
2568 cam_ccbq_remove_ccb(ccbq, abort_ccb);
2569 abort_ccb->ccb_h.status =
2570 CAM_REQ_ABORTED|CAM_DEV_QFRZN;
2571 xpt_freeze_devq(abort_ccb->ccb_h.path, 1);
2572 xpt_done(abort_ccb);
2573 start_ccb->ccb_h.status = CAM_REQ_CMP;
2576 if (abort_ccb->ccb_h.pinfo.index == CAM_UNQUEUED_INDEX
2577 && (abort_ccb->ccb_h.status & CAM_SIM_QUEUED) == 0) {
2579 * We've caught this ccb en route to
2580 * the SIM. Flag it for abort and the
2581 * SIM will do so just before starting
2582 * real work on the CCB.
2584 abort_ccb->ccb_h.status =
2585 CAM_REQ_ABORTED|CAM_DEV_QFRZN;
2586 xpt_freeze_devq(abort_ccb->ccb_h.path, 1);
2587 start_ccb->ccb_h.status = CAM_REQ_CMP;
2591 if (XPT_FC_IS_QUEUED(abort_ccb)
2592 && (abort_ccb->ccb_h.pinfo.index == CAM_DONEQ_INDEX)) {
2594 * It's already completed but waiting
2595 * for our SWI to get to it.
2597 start_ccb->ccb_h.status = CAM_UA_ABORT;
2601 * If we weren't able to take care of the abort request
2602 * in the XPT, pass the request down to the SIM for processing.
2606 case XPT_ACCEPT_TARGET_IO:
2608 case XPT_IMMED_NOTIFY:
2609 case XPT_NOTIFY_ACK:
2611 case XPT_IMMEDIATE_NOTIFY:
2612 case XPT_NOTIFY_ACKNOWLEDGE:
2613 case XPT_GET_SIM_KNOB_OLD:
2614 case XPT_GET_SIM_KNOB:
2615 case XPT_SET_SIM_KNOB:
2616 case XPT_GET_TRAN_SETTINGS:
2617 case XPT_SET_TRAN_SETTINGS:
2620 sim = path->bus->sim;
2621 lock = (mtx_owned(sim->mtx) == 0);
2624 CAM_DEBUG(path, CAM_DEBUG_TRACE,
2625 ("sim->sim_action: func=%#x\n", start_ccb->ccb_h.func_code));
2626 (*(sim->sim_action))(sim, start_ccb);
2627 CAM_DEBUG(path, CAM_DEBUG_TRACE,
2628 ("sim->sim_action: status=%#x\n", start_ccb->ccb_h.status));
2630 CAM_SIM_UNLOCK(sim);
2632 case XPT_PATH_STATS:
2633 start_ccb->cpis.last_reset = path->bus->last_reset;
2634 start_ccb->ccb_h.status = CAM_REQ_CMP;
2641 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) {
2642 start_ccb->ccb_h.status = CAM_DEV_NOT_THERE;
2644 struct ccb_getdev *cgd;
2646 cgd = &start_ccb->cgd;
2647 cgd->protocol = dev->protocol;
2648 cgd->inq_data = dev->inq_data;
2649 cgd->ident_data = dev->ident_data;
2650 cgd->inq_flags = dev->inq_flags;
2651 cgd->ccb_h.status = CAM_REQ_CMP;
2652 cgd->serial_num_len = dev->serial_num_len;
2653 if ((dev->serial_num_len > 0)
2654 && (dev->serial_num != NULL))
2655 bcopy(dev->serial_num, cgd->serial_num,
2656 dev->serial_num_len);
2660 case XPT_GDEV_STATS:
2665 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) {
2666 start_ccb->ccb_h.status = CAM_DEV_NOT_THERE;
2668 struct ccb_getdevstats *cgds;
2671 struct cam_devq *devq;
2673 cgds = &start_ccb->cgds;
2676 devq = bus->sim->devq;
2677 mtx_lock(&devq->send_mtx);
2678 cgds->dev_openings = dev->ccbq.dev_openings;
2679 cgds->dev_active = dev->ccbq.dev_active;
2680 cgds->allocated = dev->ccbq.allocated;
2681 cgds->queued = cam_ccbq_pending_ccb_count(&dev->ccbq);
2682 cgds->held = cgds->allocated - cgds->dev_active -
2684 cgds->last_reset = tar->last_reset;
2685 cgds->maxtags = dev->maxtags;
2686 cgds->mintags = dev->mintags;
2687 if (timevalcmp(&tar->last_reset, &bus->last_reset, <))
2688 cgds->last_reset = bus->last_reset;
2689 mtx_unlock(&devq->send_mtx);
2690 cgds->ccb_h.status = CAM_REQ_CMP;
2696 struct cam_periph *nperiph;
2697 struct periph_list *periph_head;
2698 struct ccb_getdevlist *cgdl;
2700 struct cam_ed *device;
2707 * Don't want anyone mucking with our data.
2709 device = path->device;
2710 periph_head = &device->periphs;
2711 cgdl = &start_ccb->cgdl;
2714 * Check and see if the list has changed since the user
2715 * last requested a list member. If so, tell them that the
2716 * list has changed, and therefore they need to start over
2717 * from the beginning.
2719 if ((cgdl->index != 0) &&
2720 (cgdl->generation != device->generation)) {
2721 cgdl->status = CAM_GDEVLIST_LIST_CHANGED;
2726 * Traverse the list of peripherals and attempt to find
2727 * the requested peripheral.
2729 for (nperiph = SLIST_FIRST(periph_head), i = 0;
2730 (nperiph != NULL) && (i <= cgdl->index);
2731 nperiph = SLIST_NEXT(nperiph, periph_links), i++) {
2732 if (i == cgdl->index) {
2733 strncpy(cgdl->periph_name,
2734 nperiph->periph_name,
2736 cgdl->unit_number = nperiph->unit_number;
2741 cgdl->status = CAM_GDEVLIST_ERROR;
2745 if (nperiph == NULL)
2746 cgdl->status = CAM_GDEVLIST_LAST_DEVICE;
2748 cgdl->status = CAM_GDEVLIST_MORE_DEVS;
2751 cgdl->generation = device->generation;
2753 cgdl->ccb_h.status = CAM_REQ_CMP;
2758 dev_pos_type position_type;
2759 struct ccb_dev_match *cdm;
2761 cdm = &start_ccb->cdm;
2764 * There are two ways of getting at information in the EDT.
2765 * The first way is via the primary EDT tree. It starts
2766 * with a list of busses, then a list of targets on a bus,
2767 * then devices/luns on a target, and then peripherals on a
2768 * device/lun. The "other" way is by the peripheral driver
2769 * lists. The peripheral driver lists are organized by
2770 * peripheral driver. (obviously) So it makes sense to
2771 * use the peripheral driver list if the user is looking
2772 * for something like "da1", or all "da" devices. If the
2773 * user is looking for something on a particular bus/target
2774 * or lun, it's generally better to go through the EDT tree.
2777 if (cdm->pos.position_type != CAM_DEV_POS_NONE)
2778 position_type = cdm->pos.position_type;
2782 position_type = CAM_DEV_POS_NONE;
2784 for (i = 0; i < cdm->num_patterns; i++) {
2785 if ((cdm->patterns[i].type == DEV_MATCH_BUS)
2786 ||(cdm->patterns[i].type == DEV_MATCH_DEVICE)){
2787 position_type = CAM_DEV_POS_EDT;
2792 if (cdm->num_patterns == 0)
2793 position_type = CAM_DEV_POS_EDT;
2794 else if (position_type == CAM_DEV_POS_NONE)
2795 position_type = CAM_DEV_POS_PDRV;
2798 switch(position_type & CAM_DEV_POS_TYPEMASK) {
2799 case CAM_DEV_POS_EDT:
2802 case CAM_DEV_POS_PDRV:
2803 xptperiphlistmatch(cdm);
2806 cdm->status = CAM_DEV_MATCH_ERROR;
2810 if (cdm->status == CAM_DEV_MATCH_ERROR)
2811 start_ccb->ccb_h.status = CAM_REQ_CMP_ERR;
2813 start_ccb->ccb_h.status = CAM_REQ_CMP;
2819 struct ccb_setasync *csa;
2820 struct async_node *cur_entry;
2821 struct async_list *async_head;
2824 csa = &start_ccb->csa;
2825 added = csa->event_enable;
2826 async_head = &path->device->asyncs;
2829 * If there is already an entry for us, simply
2832 cur_entry = SLIST_FIRST(async_head);
2833 while (cur_entry != NULL) {
2834 if ((cur_entry->callback_arg == csa->callback_arg)
2835 && (cur_entry->callback == csa->callback))
2837 cur_entry = SLIST_NEXT(cur_entry, links);
2840 if (cur_entry != NULL) {
2842 * If the request has no flags set,
2845 added &= ~cur_entry->event_enable;
2846 if (csa->event_enable == 0) {
2847 SLIST_REMOVE(async_head, cur_entry,
2849 xpt_release_device(path->device);
2850 free(cur_entry, M_CAMXPT);
2852 cur_entry->event_enable = csa->event_enable;
2854 csa->event_enable = added;
2856 cur_entry = malloc(sizeof(*cur_entry), M_CAMXPT,
2858 if (cur_entry == NULL) {
2859 csa->ccb_h.status = CAM_RESRC_UNAVAIL;
2862 cur_entry->event_enable = csa->event_enable;
2863 cur_entry->event_lock =
2864 mtx_owned(path->bus->sim->mtx) ? 1 : 0;
2865 cur_entry->callback_arg = csa->callback_arg;
2866 cur_entry->callback = csa->callback;
2867 SLIST_INSERT_HEAD(async_head, cur_entry, links);
2868 xpt_acquire_device(path->device);
2870 start_ccb->ccb_h.status = CAM_REQ_CMP;
2875 struct ccb_relsim *crs;
2878 crs = &start_ccb->crs;
2882 crs->ccb_h.status = CAM_DEV_NOT_THERE;
2886 if ((crs->release_flags & RELSIM_ADJUST_OPENINGS) != 0) {
2888 /* Don't ever go below one opening */
2889 if (crs->openings > 0) {
2890 xpt_dev_ccbq_resize(path, crs->openings);
2893 "number of openings is now %d\n",
2899 mtx_lock(&dev->sim->devq->send_mtx);
2900 if ((crs->release_flags & RELSIM_RELEASE_AFTER_TIMEOUT) != 0) {
2902 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) {
2905 * Just extend the old timeout and decrement
2906 * the freeze count so that a single timeout
2907 * is sufficient for releasing the queue.
2909 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
2910 callout_stop(&dev->callout);
2913 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
2916 callout_reset_sbt(&dev->callout,
2917 SBT_1MS * crs->release_timeout, 0,
2918 xpt_release_devq_timeout, dev, 0);
2920 dev->flags |= CAM_DEV_REL_TIMEOUT_PENDING;
2924 if ((crs->release_flags & RELSIM_RELEASE_AFTER_CMDCMPLT) != 0) {
2926 if ((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0) {
2928 * Decrement the freeze count so that a single
2929 * completion is still sufficient to unfreeze
2932 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
2935 dev->flags |= CAM_DEV_REL_ON_COMPLETE;
2936 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
2940 if ((crs->release_flags & RELSIM_RELEASE_AFTER_QEMPTY) != 0) {
2942 if ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0
2943 || (dev->ccbq.dev_active == 0)) {
2945 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
2948 dev->flags |= CAM_DEV_REL_ON_QUEUE_EMPTY;
2949 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
2952 mtx_unlock(&dev->sim->devq->send_mtx);
2954 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) == 0)
2955 xpt_release_devq(path, /*count*/1, /*run_queue*/TRUE);
2956 start_ccb->crs.qfrozen_cnt = dev->ccbq.queue.qfrozen_cnt;
2957 start_ccb->ccb_h.status = CAM_REQ_CMP;
2961 struct cam_path *oldpath;
2963 /* Check that all request bits are supported. */
2964 if (start_ccb->cdbg.flags & ~(CAM_DEBUG_COMPILE)) {
2965 start_ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
2969 cam_dflags = CAM_DEBUG_NONE;
2970 if (cam_dpath != NULL) {
2971 oldpath = cam_dpath;
2973 xpt_free_path(oldpath);
2975 if (start_ccb->cdbg.flags != CAM_DEBUG_NONE) {
2976 if (xpt_create_path(&cam_dpath, NULL,
2977 start_ccb->ccb_h.path_id,
2978 start_ccb->ccb_h.target_id,
2979 start_ccb->ccb_h.target_lun) !=
2981 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
2983 cam_dflags = start_ccb->cdbg.flags;
2984 start_ccb->ccb_h.status = CAM_REQ_CMP;
2985 xpt_print(cam_dpath, "debugging flags now %x\n",
2989 start_ccb->ccb_h.status = CAM_REQ_CMP;
2993 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0)
2994 xpt_freeze_devq(path, 1);
2995 start_ccb->ccb_h.status = CAM_REQ_CMP;
3002 printf("%s: CCB type %#x not supported\n", __func__,
3003 start_ccb->ccb_h.func_code);
3004 start_ccb->ccb_h.status = CAM_PROVIDE_FAIL;
3005 if (start_ccb->ccb_h.func_code & XPT_FC_DEV_QUEUED) {
3006 xpt_done(start_ccb);
3013 xpt_polled_action(union ccb *start_ccb)
3016 struct cam_sim *sim;
3017 struct cam_devq *devq;
3020 timeout = start_ccb->ccb_h.timeout * 10;
3021 sim = start_ccb->ccb_h.path->bus->sim;
3023 dev = start_ccb->ccb_h.path->device;
3025 mtx_unlock(&dev->device_mtx);
3028 * Steal an opening so that no other queued requests
3029 * can get it before us while we simulate interrupts.
3031 mtx_lock(&devq->send_mtx);
3032 dev->ccbq.dev_openings--;
3033 while((devq->send_openings <= 0 || dev->ccbq.dev_openings < 0) &&
3035 mtx_unlock(&devq->send_mtx);
3038 (*(sim->sim_poll))(sim);
3039 CAM_SIM_UNLOCK(sim);
3041 mtx_lock(&devq->send_mtx);
3043 dev->ccbq.dev_openings++;
3044 mtx_unlock(&devq->send_mtx);
3047 xpt_action(start_ccb);
3048 while(--timeout > 0) {
3050 (*(sim->sim_poll))(sim);
3051 CAM_SIM_UNLOCK(sim);
3053 if ((start_ccb->ccb_h.status & CAM_STATUS_MASK)
3060 * XXX Is it worth adding a sim_timeout entry
3061 * point so we can attempt recovery? If
3062 * this is only used for dumps, I don't think
3065 start_ccb->ccb_h.status = CAM_CMD_TIMEOUT;
3068 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
3071 mtx_lock(&dev->device_mtx);
3075 * Schedule a peripheral driver to receive a ccb when its
3076 * target device has space for more transactions.
3079 xpt_schedule(struct cam_periph *periph, u_int32_t new_priority)
3082 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("xpt_schedule\n"));
3083 cam_periph_assert(periph, MA_OWNED);
3084 if (new_priority < periph->scheduled_priority) {
3085 periph->scheduled_priority = new_priority;
3086 xpt_run_allocq(periph, 0);
3092 * Schedule a device to run on a given queue.
3093 * If the device was inserted as a new entry on the queue,
3094 * return 1 meaning the device queue should be run. If we
3095 * were already queued, implying someone else has already
3096 * started the queue, return 0 so the caller doesn't attempt
3100 xpt_schedule_dev(struct camq *queue, cam_pinfo *pinfo,
3101 u_int32_t new_priority)
3104 u_int32_t old_priority;
3106 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_schedule_dev\n"));
3108 old_priority = pinfo->priority;
3111 * Are we already queued?
3113 if (pinfo->index != CAM_UNQUEUED_INDEX) {
3114 /* Simply reorder based on new priority */
3115 if (new_priority < old_priority) {
3116 camq_change_priority(queue, pinfo->index,
3118 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3119 ("changed priority to %d\n",
3125 /* New entry on the queue */
3126 if (new_priority < old_priority)
3127 pinfo->priority = new_priority;
3129 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3130 ("Inserting onto queue\n"));
3131 pinfo->generation = ++queue->generation;
3132 camq_insert(queue, pinfo);
3139 xpt_run_allocq_task(void *context, int pending)
3141 struct cam_periph *periph = context;
3143 cam_periph_lock(periph);
3144 periph->flags &= ~CAM_PERIPH_RUN_TASK;
3145 xpt_run_allocq(periph, 1);
3146 cam_periph_unlock(periph);
3147 cam_periph_release(periph);
3151 xpt_run_allocq(struct cam_periph *periph, int sleep)
3153 struct cam_ed *device;
3157 cam_periph_assert(periph, MA_OWNED);
3158 if (periph->periph_allocating)
3160 periph->periph_allocating = 1;
3161 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_allocq(%p)\n", periph));
3162 device = periph->path->device;
3165 while ((prio = min(periph->scheduled_priority,
3166 periph->immediate_priority)) != CAM_PRIORITY_NONE &&
3167 (periph->periph_allocated - (ccb != NULL ? 1 : 0) <
3168 device->ccbq.total_openings || prio <= CAM_PRIORITY_OOB)) {
3171 (ccb = xpt_get_ccb_nowait(periph)) == NULL) {
3173 ccb = xpt_get_ccb(periph);
3176 if (periph->flags & CAM_PERIPH_RUN_TASK)
3178 cam_periph_doacquire(periph);
3179 periph->flags |= CAM_PERIPH_RUN_TASK;
3180 taskqueue_enqueue(xsoftc.xpt_taskq,
3181 &periph->periph_run_task);
3184 xpt_setup_ccb(&ccb->ccb_h, periph->path, prio);
3185 if (prio == periph->immediate_priority) {
3186 periph->immediate_priority = CAM_PRIORITY_NONE;
3187 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3188 ("waking cam_periph_getccb()\n"));
3189 SLIST_INSERT_HEAD(&periph->ccb_list, &ccb->ccb_h,
3191 wakeup(&periph->ccb_list);
3193 periph->scheduled_priority = CAM_PRIORITY_NONE;
3194 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3195 ("calling periph_start()\n"));
3196 periph->periph_start(periph, ccb);
3201 xpt_release_ccb(ccb);
3202 periph->periph_allocating = 0;
3206 xpt_run_devq(struct cam_devq *devq)
3208 char cdb_str[(SCSI_MAX_CDBLEN * 3) + 1];
3211 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_devq\n"));
3213 devq->send_queue.qfrozen_cnt++;
3214 while ((devq->send_queue.entries > 0)
3215 && (devq->send_openings > 0)
3216 && (devq->send_queue.qfrozen_cnt <= 1)) {
3217 struct cam_ed *device;
3218 union ccb *work_ccb;
3219 struct cam_sim *sim;
3221 device = (struct cam_ed *)camq_remove(&devq->send_queue,
3223 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3224 ("running device %p\n", device));
3226 work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD);
3227 if (work_ccb == NULL) {
3228 printf("device on run queue with no ccbs???\n");
3232 if ((work_ccb->ccb_h.flags & CAM_HIGH_POWER) != 0) {
3234 mtx_lock(&xsoftc.xpt_highpower_lock);
3235 if (xsoftc.num_highpower <= 0) {
3237 * We got a high power command, but we
3238 * don't have any available slots. Freeze
3239 * the device queue until we have a slot
3242 xpt_freeze_devq_device(device, 1);
3243 STAILQ_INSERT_TAIL(&xsoftc.highpowerq, device,
3246 mtx_unlock(&xsoftc.xpt_highpower_lock);
3250 * Consume a high power slot while
3253 xsoftc.num_highpower--;
3255 mtx_unlock(&xsoftc.xpt_highpower_lock);
3257 cam_ccbq_remove_ccb(&device->ccbq, work_ccb);
3258 cam_ccbq_send_ccb(&device->ccbq, work_ccb);
3259 devq->send_openings--;
3260 devq->send_active++;
3261 xpt_schedule_devq(devq, device);
3262 mtx_unlock(&devq->send_mtx);
3264 if ((work_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0) {
3266 * The client wants to freeze the queue
3267 * after this CCB is sent.
3269 xpt_freeze_devq(work_ccb->ccb_h.path, 1);
3272 /* In Target mode, the peripheral driver knows best... */
3273 if (work_ccb->ccb_h.func_code == XPT_SCSI_IO) {
3274 if ((device->inq_flags & SID_CmdQue) != 0
3275 && work_ccb->csio.tag_action != CAM_TAG_ACTION_NONE)
3276 work_ccb->ccb_h.flags |= CAM_TAG_ACTION_VALID;
3279 * Clear this in case of a retried CCB that
3280 * failed due to a rejected tag.
3282 work_ccb->ccb_h.flags &= ~CAM_TAG_ACTION_VALID;
3285 switch (work_ccb->ccb_h.func_code) {
3287 CAM_DEBUG(work_ccb->ccb_h.path,
3288 CAM_DEBUG_CDB,("%s. CDB: %s\n",
3289 scsi_op_desc(work_ccb->csio.cdb_io.cdb_bytes[0],
3291 scsi_cdb_string(work_ccb->csio.cdb_io.cdb_bytes,
3292 cdb_str, sizeof(cdb_str))));
3295 CAM_DEBUG(work_ccb->ccb_h.path,
3296 CAM_DEBUG_CDB,("%s. ACB: %s\n",
3297 ata_op_string(&work_ccb->ataio.cmd),
3298 ata_cmd_string(&work_ccb->ataio.cmd,
3299 cdb_str, sizeof(cdb_str))));
3306 * Device queues can be shared among multiple SIM instances
3307 * that reside on different busses. Use the SIM from the
3308 * queued device, rather than the one from the calling bus.
3311 lock = (mtx_owned(sim->mtx) == 0);
3314 work_ccb->ccb_h.qos.sim_data = sbinuptime(); // xxx uintprt_t too small 32bit platforms
3315 (*(sim->sim_action))(sim, work_ccb);
3317 CAM_SIM_UNLOCK(sim);
3318 mtx_lock(&devq->send_mtx);
3320 devq->send_queue.qfrozen_cnt--;
3324 * This function merges stuff from the slave ccb into the master ccb, while
3325 * keeping important fields in the master ccb constant.
3328 xpt_merge_ccb(union ccb *master_ccb, union ccb *slave_ccb)
3332 * Pull fields that are valid for peripheral drivers to set
3333 * into the master CCB along with the CCB "payload".
3335 master_ccb->ccb_h.retry_count = slave_ccb->ccb_h.retry_count;
3336 master_ccb->ccb_h.func_code = slave_ccb->ccb_h.func_code;
3337 master_ccb->ccb_h.timeout = slave_ccb->ccb_h.timeout;
3338 master_ccb->ccb_h.flags = slave_ccb->ccb_h.flags;
3339 bcopy(&(&slave_ccb->ccb_h)[1], &(&master_ccb->ccb_h)[1],
3340 sizeof(union ccb) - sizeof(struct ccb_hdr));
3344 xpt_setup_ccb_flags(struct ccb_hdr *ccb_h, struct cam_path *path,
3345 u_int32_t priority, u_int32_t flags)
3348 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_setup_ccb\n"));
3349 ccb_h->pinfo.priority = priority;
3351 ccb_h->path_id = path->bus->path_id;
3353 ccb_h->target_id = path->target->target_id;
3355 ccb_h->target_id = CAM_TARGET_WILDCARD;
3357 ccb_h->target_lun = path->device->lun_id;
3358 ccb_h->pinfo.generation = ++path->device->ccbq.queue.generation;
3360 ccb_h->target_lun = CAM_TARGET_WILDCARD;
3362 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX;
3363 ccb_h->flags = flags;
3368 xpt_setup_ccb(struct ccb_hdr *ccb_h, struct cam_path *path, u_int32_t priority)
3370 xpt_setup_ccb_flags(ccb_h, path, priority, /*flags*/ 0);
3373 /* Path manipulation functions */
3375 xpt_create_path(struct cam_path **new_path_ptr, struct cam_periph *perph,
3376 path_id_t path_id, target_id_t target_id, lun_id_t lun_id)
3378 struct cam_path *path;
3381 path = (struct cam_path *)malloc(sizeof(*path), M_CAMPATH, M_NOWAIT);
3384 status = CAM_RESRC_UNAVAIL;
3387 status = xpt_compile_path(path, perph, path_id, target_id, lun_id);
3388 if (status != CAM_REQ_CMP) {
3389 free(path, M_CAMPATH);
3392 *new_path_ptr = path;
3397 xpt_create_path_unlocked(struct cam_path **new_path_ptr,
3398 struct cam_periph *periph, path_id_t path_id,
3399 target_id_t target_id, lun_id_t lun_id)
3402 return (xpt_create_path(new_path_ptr, periph, path_id, target_id,
3407 xpt_compile_path(struct cam_path *new_path, struct cam_periph *perph,
3408 path_id_t path_id, target_id_t target_id, lun_id_t lun_id)
3411 struct cam_et *target;
3412 struct cam_ed *device;
3415 status = CAM_REQ_CMP; /* Completed without error */
3416 target = NULL; /* Wildcarded */
3417 device = NULL; /* Wildcarded */
3420 * We will potentially modify the EDT, so block interrupts
3421 * that may attempt to create cam paths.
3423 bus = xpt_find_bus(path_id);
3425 status = CAM_PATH_INVALID;
3428 mtx_lock(&bus->eb_mtx);
3429 target = xpt_find_target(bus, target_id);
3430 if (target == NULL) {
3432 struct cam_et *new_target;
3434 new_target = xpt_alloc_target(bus, target_id);
3435 if (new_target == NULL) {
3436 status = CAM_RESRC_UNAVAIL;
3438 target = new_target;
3442 if (target != NULL) {
3443 device = xpt_find_device(target, lun_id);
3444 if (device == NULL) {
3446 struct cam_ed *new_device;
3449 (*(bus->xport->alloc_device))(bus,
3452 if (new_device == NULL) {
3453 status = CAM_RESRC_UNAVAIL;
3455 device = new_device;
3459 mtx_unlock(&bus->eb_mtx);
3463 * Only touch the user's data if we are successful.
3465 if (status == CAM_REQ_CMP) {
3466 new_path->periph = perph;
3467 new_path->bus = bus;
3468 new_path->target = target;
3469 new_path->device = device;
3470 CAM_DEBUG(new_path, CAM_DEBUG_TRACE, ("xpt_compile_path\n"));
3473 xpt_release_device(device);
3475 xpt_release_target(target);
3477 xpt_release_bus(bus);
3483 xpt_clone_path(struct cam_path **new_path_ptr, struct cam_path *path)
3485 struct cam_path *new_path;
3487 new_path = (struct cam_path *)malloc(sizeof(*path), M_CAMPATH, M_NOWAIT);
3488 if (new_path == NULL)
3489 return(CAM_RESRC_UNAVAIL);
3490 xpt_copy_path(new_path, path);
3491 *new_path_ptr = new_path;
3492 return (CAM_REQ_CMP);
3496 xpt_copy_path(struct cam_path *new_path, struct cam_path *path)
3500 if (path->bus != NULL)
3501 xpt_acquire_bus(path->bus);
3502 if (path->target != NULL)
3503 xpt_acquire_target(path->target);
3504 if (path->device != NULL)
3505 xpt_acquire_device(path->device);
3509 xpt_release_path(struct cam_path *path)
3511 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_path\n"));
3512 if (path->device != NULL) {
3513 xpt_release_device(path->device);
3514 path->device = NULL;
3516 if (path->target != NULL) {
3517 xpt_release_target(path->target);
3518 path->target = NULL;
3520 if (path->bus != NULL) {
3521 xpt_release_bus(path->bus);
3527 xpt_free_path(struct cam_path *path)
3530 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_free_path\n"));
3531 xpt_release_path(path);
3532 free(path, M_CAMPATH);
3536 xpt_path_counts(struct cam_path *path, uint32_t *bus_ref,
3537 uint32_t *periph_ref, uint32_t *target_ref, uint32_t *device_ref)
3543 *bus_ref = path->bus->refcount;
3549 *periph_ref = path->periph->refcount;
3556 *target_ref = path->target->refcount;
3562 *device_ref = path->device->refcount;
3569 * Return -1 for failure, 0 for exact match, 1 for match with wildcards
3570 * in path1, 2 for match with wildcards in path2.
3573 xpt_path_comp(struct cam_path *path1, struct cam_path *path2)
3577 if (path1->bus != path2->bus) {
3578 if (path1->bus->path_id == CAM_BUS_WILDCARD)
3580 else if (path2->bus->path_id == CAM_BUS_WILDCARD)
3585 if (path1->target != path2->target) {
3586 if (path1->target->target_id == CAM_TARGET_WILDCARD) {
3589 } else if (path2->target->target_id == CAM_TARGET_WILDCARD)
3594 if (path1->device != path2->device) {
3595 if (path1->device->lun_id == CAM_LUN_WILDCARD) {
3598 } else if (path2->device->lun_id == CAM_LUN_WILDCARD)
3607 xpt_path_comp_dev(struct cam_path *path, struct cam_ed *dev)
3611 if (path->bus != dev->target->bus) {
3612 if (path->bus->path_id == CAM_BUS_WILDCARD)
3614 else if (dev->target->bus->path_id == CAM_BUS_WILDCARD)
3619 if (path->target != dev->target) {
3620 if (path->target->target_id == CAM_TARGET_WILDCARD) {
3623 } else if (dev->target->target_id == CAM_TARGET_WILDCARD)
3628 if (path->device != dev) {
3629 if (path->device->lun_id == CAM_LUN_WILDCARD) {
3632 } else if (dev->lun_id == CAM_LUN_WILDCARD)
3641 xpt_print_path(struct cam_path *path)
3645 printf("(nopath): ");
3647 if (path->periph != NULL)
3648 printf("(%s%d:", path->periph->periph_name,
3649 path->periph->unit_number);
3651 printf("(noperiph:");
3653 if (path->bus != NULL)
3654 printf("%s%d:%d:", path->bus->sim->sim_name,
3655 path->bus->sim->unit_number,
3656 path->bus->sim->bus_id);
3660 if (path->target != NULL)
3661 printf("%d:", path->target->target_id);
3665 if (path->device != NULL)
3666 printf("%jx): ", (uintmax_t)path->device->lun_id);
3673 xpt_print_device(struct cam_ed *device)
3677 printf("(nopath): ");
3679 printf("(noperiph:%s%d:%d:%d:%jx): ", device->sim->sim_name,
3680 device->sim->unit_number,
3681 device->sim->bus_id,
3682 device->target->target_id,
3683 (uintmax_t)device->lun_id);
3688 xpt_print(struct cam_path *path, const char *fmt, ...)
3691 xpt_print_path(path);
3698 xpt_path_string(struct cam_path *path, char *str, size_t str_len)
3702 sbuf_new(&sb, str, str_len, 0);
3705 sbuf_printf(&sb, "(nopath): ");
3707 if (path->periph != NULL)
3708 sbuf_printf(&sb, "(%s%d:", path->periph->periph_name,
3709 path->periph->unit_number);
3711 sbuf_printf(&sb, "(noperiph:");
3713 if (path->bus != NULL)
3714 sbuf_printf(&sb, "%s%d:%d:", path->bus->sim->sim_name,
3715 path->bus->sim->unit_number,
3716 path->bus->sim->bus_id);
3718 sbuf_printf(&sb, "nobus:");
3720 if (path->target != NULL)
3721 sbuf_printf(&sb, "%d:", path->target->target_id);
3723 sbuf_printf(&sb, "X:");
3725 if (path->device != NULL)
3726 sbuf_printf(&sb, "%jx): ",
3727 (uintmax_t)path->device->lun_id);
3729 sbuf_printf(&sb, "X): ");
3733 return(sbuf_len(&sb));
3737 xpt_path_path_id(struct cam_path *path)
3739 return(path->bus->path_id);
3743 xpt_path_target_id(struct cam_path *path)
3745 if (path->target != NULL)
3746 return (path->target->target_id);
3748 return (CAM_TARGET_WILDCARD);
3752 xpt_path_lun_id(struct cam_path *path)
3754 if (path->device != NULL)
3755 return (path->device->lun_id);
3757 return (CAM_LUN_WILDCARD);
3761 xpt_path_sim(struct cam_path *path)
3764 return (path->bus->sim);
3768 xpt_path_periph(struct cam_path *path)
3771 return (path->periph);
3775 * Release a CAM control block for the caller. Remit the cost of the structure
3776 * to the device referenced by the path. If the this device had no 'credits'
3777 * and peripheral drivers have registered async callbacks for this notification
3781 xpt_release_ccb(union ccb *free_ccb)
3783 struct cam_ed *device;
3784 struct cam_periph *periph;
3786 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_release_ccb\n"));
3787 xpt_path_assert(free_ccb->ccb_h.path, MA_OWNED);
3788 device = free_ccb->ccb_h.path->device;
3789 periph = free_ccb->ccb_h.path->periph;
3791 xpt_free_ccb(free_ccb);
3792 periph->periph_allocated--;
3793 cam_ccbq_release_opening(&device->ccbq);
3794 xpt_run_allocq(periph, 0);
3797 /* Functions accessed by SIM drivers */
3799 static struct xpt_xport xport_default = {
3800 .alloc_device = xpt_alloc_device_default,
3801 .action = xpt_action_default,
3802 .async = xpt_dev_async_default,
3806 * A sim structure, listing the SIM entry points and instance
3807 * identification info is passed to xpt_bus_register to hook the SIM
3808 * into the CAM framework. xpt_bus_register creates a cam_eb entry
3809 * for this new bus and places it in the array of busses and assigns
3810 * it a path_id. The path_id may be influenced by "hard wiring"
3811 * information specified by the user. Once interrupt services are
3812 * available, the bus will be probed.
3815 xpt_bus_register(struct cam_sim *sim, device_t parent, u_int32_t bus)
3817 struct cam_eb *new_bus;
3818 struct cam_eb *old_bus;
3819 struct ccb_pathinq cpi;
3820 struct cam_path *path;
3823 mtx_assert(sim->mtx, MA_OWNED);
3826 new_bus = (struct cam_eb *)malloc(sizeof(*new_bus),
3827 M_CAMXPT, M_NOWAIT|M_ZERO);
3828 if (new_bus == NULL) {
3829 /* Couldn't satisfy request */
3830 return (CAM_RESRC_UNAVAIL);
3833 mtx_init(&new_bus->eb_mtx, "CAM bus lock", NULL, MTX_DEF);
3834 TAILQ_INIT(&new_bus->et_entries);
3837 timevalclear(&new_bus->last_reset);
3839 new_bus->refcount = 1; /* Held until a bus_deregister event */
3840 new_bus->generation = 0;
3843 sim->path_id = new_bus->path_id =
3844 xptpathid(sim->sim_name, sim->unit_number, sim->bus_id);
3845 old_bus = TAILQ_FIRST(&xsoftc.xpt_busses);
3846 while (old_bus != NULL
3847 && old_bus->path_id < new_bus->path_id)
3848 old_bus = TAILQ_NEXT(old_bus, links);
3849 if (old_bus != NULL)
3850 TAILQ_INSERT_BEFORE(old_bus, new_bus, links);
3852 TAILQ_INSERT_TAIL(&xsoftc.xpt_busses, new_bus, links);
3853 xsoftc.bus_generation++;
3857 * Set a default transport so that a PATH_INQ can be issued to
3858 * the SIM. This will then allow for probing and attaching of
3859 * a more appropriate transport.
3861 new_bus->xport = &xport_default;
3863 status = xpt_create_path(&path, /*periph*/NULL, sim->path_id,
3864 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
3865 if (status != CAM_REQ_CMP) {
3866 xpt_release_bus(new_bus);
3867 free(path, M_CAMXPT);
3868 return (CAM_RESRC_UNAVAIL);
3871 xpt_setup_ccb(&cpi.ccb_h, path, CAM_PRIORITY_NORMAL);
3872 cpi.ccb_h.func_code = XPT_PATH_INQ;
3873 xpt_action((union ccb *)&cpi);
3875 if (cpi.ccb_h.status == CAM_REQ_CMP) {
3876 switch (cpi.transport) {
3884 new_bus->xport = scsi_get_xport();
3888 new_bus->xport = ata_get_xport();
3891 new_bus->xport = &xport_default;
3896 /* Notify interested parties */
3897 if (sim->path_id != CAM_XPT_PATH_ID) {
3899 xpt_async(AC_PATH_REGISTERED, path, &cpi);
3900 if ((cpi.hba_misc & PIM_NOSCAN) == 0) {
3901 union ccb *scan_ccb;
3903 /* Initiate bus rescan. */
3904 scan_ccb = xpt_alloc_ccb_nowait();
3905 if (scan_ccb != NULL) {
3906 scan_ccb->ccb_h.path = path;
3907 scan_ccb->ccb_h.func_code = XPT_SCAN_BUS;
3908 scan_ccb->crcn.flags = 0;
3909 xpt_rescan(scan_ccb);
3912 "Can't allocate CCB to scan bus\n");
3913 xpt_free_path(path);
3916 xpt_free_path(path);
3918 xpt_free_path(path);
3919 return (CAM_SUCCESS);
3923 xpt_bus_deregister(path_id_t pathid)
3925 struct cam_path bus_path;
3928 status = xpt_compile_path(&bus_path, NULL, pathid,
3929 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
3930 if (status != CAM_REQ_CMP)
3933 xpt_async(AC_LOST_DEVICE, &bus_path, NULL);
3934 xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL);
3936 /* Release the reference count held while registered. */
3937 xpt_release_bus(bus_path.bus);
3938 xpt_release_path(&bus_path);
3940 return (CAM_REQ_CMP);
3944 xptnextfreepathid(void)
3950 mtx_assert(&xsoftc.xpt_topo_lock, MA_OWNED);
3952 bus = TAILQ_FIRST(&xsoftc.xpt_busses);
3954 /* Find an unoccupied pathid */
3955 while (bus != NULL && bus->path_id <= pathid) {
3956 if (bus->path_id == pathid)
3958 bus = TAILQ_NEXT(bus, links);
3962 * Ensure that this pathid is not reserved for
3963 * a bus that may be registered in the future.
3965 if (resource_string_value("scbus", pathid, "at", &strval) == 0) {
3967 /* Start the search over */
3974 xptpathid(const char *sim_name, int sim_unit, int sim_bus)
3981 pathid = CAM_XPT_PATH_ID;
3982 snprintf(buf, sizeof(buf), "%s%d", sim_name, sim_unit);
3983 if (strcmp(buf, "xpt0") == 0 && sim_bus == 0)
3986 while ((resource_find_match(&i, &dname, &dunit, "at", buf)) == 0) {
3987 if (strcmp(dname, "scbus")) {
3988 /* Avoid a bit of foot shooting. */
3991 if (dunit < 0) /* unwired?! */
3993 if (resource_int_value("scbus", dunit, "bus", &val) == 0) {
3994 if (sim_bus == val) {
3998 } else if (sim_bus == 0) {
3999 /* Unspecified matches bus 0 */
4003 printf("Ambiguous scbus configuration for %s%d "
4004 "bus %d, cannot wire down. The kernel "
4005 "config entry for scbus%d should "
4006 "specify a controller bus.\n"
4007 "Scbus will be assigned dynamically.\n",
4008 sim_name, sim_unit, sim_bus, dunit);
4013 if (pathid == CAM_XPT_PATH_ID)
4014 pathid = xptnextfreepathid();
4019 xpt_async_string(u_int32_t async_code)
4022 switch (async_code) {
4023 case AC_BUS_RESET: return ("AC_BUS_RESET");
4024 case AC_UNSOL_RESEL: return ("AC_UNSOL_RESEL");
4025 case AC_SCSI_AEN: return ("AC_SCSI_AEN");
4026 case AC_SENT_BDR: return ("AC_SENT_BDR");
4027 case AC_PATH_REGISTERED: return ("AC_PATH_REGISTERED");
4028 case AC_PATH_DEREGISTERED: return ("AC_PATH_DEREGISTERED");
4029 case AC_FOUND_DEVICE: return ("AC_FOUND_DEVICE");
4030 case AC_LOST_DEVICE: return ("AC_LOST_DEVICE");
4031 case AC_TRANSFER_NEG: return ("AC_TRANSFER_NEG");
4032 case AC_INQ_CHANGED: return ("AC_INQ_CHANGED");
4033 case AC_GETDEV_CHANGED: return ("AC_GETDEV_CHANGED");
4034 case AC_CONTRACT: return ("AC_CONTRACT");
4035 case AC_ADVINFO_CHANGED: return ("AC_ADVINFO_CHANGED");
4036 case AC_UNIT_ATTENTION: return ("AC_UNIT_ATTENTION");
4038 return ("AC_UNKNOWN");
4042 xpt_async_size(u_int32_t async_code)
4045 switch (async_code) {
4046 case AC_BUS_RESET: return (0);
4047 case AC_UNSOL_RESEL: return (0);
4048 case AC_SCSI_AEN: return (0);
4049 case AC_SENT_BDR: return (0);
4050 case AC_PATH_REGISTERED: return (sizeof(struct ccb_pathinq));
4051 case AC_PATH_DEREGISTERED: return (0);
4052 case AC_FOUND_DEVICE: return (sizeof(struct ccb_getdev));
4053 case AC_LOST_DEVICE: return (0);
4054 case AC_TRANSFER_NEG: return (sizeof(struct ccb_trans_settings));
4055 case AC_INQ_CHANGED: return (0);
4056 case AC_GETDEV_CHANGED: return (0);
4057 case AC_CONTRACT: return (sizeof(struct ac_contract));
4058 case AC_ADVINFO_CHANGED: return (-1);
4059 case AC_UNIT_ATTENTION: return (sizeof(struct ccb_scsiio));
4065 xpt_async_process_dev(struct cam_ed *device, void *arg)
4067 union ccb *ccb = arg;
4068 struct cam_path *path = ccb->ccb_h.path;
4069 void *async_arg = ccb->casync.async_arg_ptr;
4070 u_int32_t async_code = ccb->casync.async_code;
4073 if (path->device != device
4074 && path->device->lun_id != CAM_LUN_WILDCARD
4075 && device->lun_id != CAM_LUN_WILDCARD)
4079 * The async callback could free the device.
4080 * If it is a broadcast async, it doesn't hold
4081 * device reference, so take our own reference.
4083 xpt_acquire_device(device);
4086 * If async for specific device is to be delivered to
4087 * the wildcard client, take the specific device lock.
4088 * XXX: We may need a way for client to specify it.
4090 if ((device->lun_id == CAM_LUN_WILDCARD &&
4091 path->device->lun_id != CAM_LUN_WILDCARD) ||
4092 (device->target->target_id == CAM_TARGET_WILDCARD &&
4093 path->target->target_id != CAM_TARGET_WILDCARD) ||
4094 (device->target->bus->path_id == CAM_BUS_WILDCARD &&
4095 path->target->bus->path_id != CAM_BUS_WILDCARD)) {
4096 mtx_unlock(&device->device_mtx);
4097 xpt_path_lock(path);
4102 (*(device->target->bus->xport->async))(async_code,
4103 device->target->bus, device->target, device, async_arg);
4104 xpt_async_bcast(&device->asyncs, async_code, path, async_arg);
4107 xpt_path_unlock(path);
4108 mtx_lock(&device->device_mtx);
4110 xpt_release_device(device);
4115 xpt_async_process_tgt(struct cam_et *target, void *arg)
4117 union ccb *ccb = arg;
4118 struct cam_path *path = ccb->ccb_h.path;
4120 if (path->target != target
4121 && path->target->target_id != CAM_TARGET_WILDCARD
4122 && target->target_id != CAM_TARGET_WILDCARD)
4125 if (ccb->casync.async_code == AC_SENT_BDR) {
4126 /* Update our notion of when the last reset occurred */
4127 microtime(&target->last_reset);
4130 return (xptdevicetraverse(target, NULL, xpt_async_process_dev, ccb));
4134 xpt_async_process(struct cam_periph *periph, union ccb *ccb)
4137 struct cam_path *path;
4139 u_int32_t async_code;
4141 path = ccb->ccb_h.path;
4142 async_code = ccb->casync.async_code;
4143 async_arg = ccb->casync.async_arg_ptr;
4144 CAM_DEBUG(path, CAM_DEBUG_TRACE | CAM_DEBUG_INFO,
4145 ("xpt_async(%s)\n", xpt_async_string(async_code)));
4148 if (async_code == AC_BUS_RESET) {
4149 /* Update our notion of when the last reset occurred */
4150 microtime(&bus->last_reset);
4153 xpttargettraverse(bus, NULL, xpt_async_process_tgt, ccb);
4156 * If this wasn't a fully wildcarded async, tell all
4157 * clients that want all async events.
4159 if (bus != xpt_periph->path->bus) {
4160 xpt_path_lock(xpt_periph->path);
4161 xpt_async_process_dev(xpt_periph->path->device, ccb);
4162 xpt_path_unlock(xpt_periph->path);
4165 if (path->device != NULL && path->device->lun_id != CAM_LUN_WILDCARD)
4166 xpt_release_devq(path, 1, TRUE);
4168 xpt_release_simq(path->bus->sim, TRUE);
4169 if (ccb->casync.async_arg_size > 0)
4170 free(async_arg, M_CAMXPT);
4171 xpt_free_path(path);
4176 xpt_async_bcast(struct async_list *async_head,
4177 u_int32_t async_code,
4178 struct cam_path *path, void *async_arg)
4180 struct async_node *cur_entry;
4183 cur_entry = SLIST_FIRST(async_head);
4184 while (cur_entry != NULL) {
4185 struct async_node *next_entry;
4187 * Grab the next list entry before we call the current
4188 * entry's callback. This is because the callback function
4189 * can delete its async callback entry.
4191 next_entry = SLIST_NEXT(cur_entry, links);
4192 if ((cur_entry->event_enable & async_code) != 0) {
4193 lock = cur_entry->event_lock;
4195 CAM_SIM_LOCK(path->device->sim);
4196 cur_entry->callback(cur_entry->callback_arg,
4200 CAM_SIM_UNLOCK(path->device->sim);
4202 cur_entry = next_entry;
4207 xpt_async(u_int32_t async_code, struct cam_path *path, void *async_arg)
4212 ccb = xpt_alloc_ccb_nowait();
4214 xpt_print(path, "Can't allocate CCB to send %s\n",
4215 xpt_async_string(async_code));
4219 if (xpt_clone_path(&ccb->ccb_h.path, path) != CAM_REQ_CMP) {
4220 xpt_print(path, "Can't allocate path to send %s\n",
4221 xpt_async_string(async_code));
4225 ccb->ccb_h.path->periph = NULL;
4226 ccb->ccb_h.func_code = XPT_ASYNC;
4227 ccb->ccb_h.cbfcnp = xpt_async_process;
4228 ccb->ccb_h.flags |= CAM_UNLOCKED;
4229 ccb->casync.async_code = async_code;
4230 ccb->casync.async_arg_size = 0;
4231 size = xpt_async_size(async_code);
4232 if (size > 0 && async_arg != NULL) {
4233 ccb->casync.async_arg_ptr = malloc(size, M_CAMXPT, M_NOWAIT);
4234 if (ccb->casync.async_arg_ptr == NULL) {
4235 xpt_print(path, "Can't allocate argument to send %s\n",
4236 xpt_async_string(async_code));
4237 xpt_free_path(ccb->ccb_h.path);
4241 memcpy(ccb->casync.async_arg_ptr, async_arg, size);
4242 ccb->casync.async_arg_size = size;
4243 } else if (size < 0) {
4244 ccb->casync.async_arg_ptr = async_arg;
4245 ccb->casync.async_arg_size = size;
4247 if (path->device != NULL && path->device->lun_id != CAM_LUN_WILDCARD)
4248 xpt_freeze_devq(path, 1);
4250 xpt_freeze_simq(path->bus->sim, 1);
4255 xpt_dev_async_default(u_int32_t async_code, struct cam_eb *bus,
4256 struct cam_et *target, struct cam_ed *device,
4261 * We only need to handle events for real devices.
4263 if (target->target_id == CAM_TARGET_WILDCARD
4264 || device->lun_id == CAM_LUN_WILDCARD)
4267 printf("%s called\n", __func__);
4271 xpt_freeze_devq_device(struct cam_ed *dev, u_int count)
4273 struct cam_devq *devq;
4276 devq = dev->sim->devq;
4277 mtx_assert(&devq->send_mtx, MA_OWNED);
4278 CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE,
4279 ("xpt_freeze_devq_device(%d) %u->%u\n", count,
4280 dev->ccbq.queue.qfrozen_cnt, dev->ccbq.queue.qfrozen_cnt + count));
4281 freeze = (dev->ccbq.queue.qfrozen_cnt += count);
4282 /* Remove frozen device from sendq. */
4283 if (device_is_queued(dev))
4284 camq_remove(&devq->send_queue, dev->devq_entry.index);
4289 xpt_freeze_devq(struct cam_path *path, u_int count)
4291 struct cam_ed *dev = path->device;
4292 struct cam_devq *devq;
4295 devq = dev->sim->devq;
4296 mtx_lock(&devq->send_mtx);
4297 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_freeze_devq(%d)\n", count));
4298 freeze = xpt_freeze_devq_device(dev, count);
4299 mtx_unlock(&devq->send_mtx);
4304 xpt_freeze_simq(struct cam_sim *sim, u_int count)
4306 struct cam_devq *devq;
4310 mtx_lock(&devq->send_mtx);
4311 freeze = (devq->send_queue.qfrozen_cnt += count);
4312 mtx_unlock(&devq->send_mtx);
4317 xpt_release_devq_timeout(void *arg)
4320 struct cam_devq *devq;
4322 dev = (struct cam_ed *)arg;
4323 CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE, ("xpt_release_devq_timeout\n"));
4324 devq = dev->sim->devq;
4325 mtx_assert(&devq->send_mtx, MA_OWNED);
4326 if (xpt_release_devq_device(dev, /*count*/1, /*run_queue*/TRUE))
4331 xpt_release_devq(struct cam_path *path, u_int count, int run_queue)
4334 struct cam_devq *devq;
4336 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_devq(%d, %d)\n",
4339 devq = dev->sim->devq;
4340 mtx_lock(&devq->send_mtx);
4341 if (xpt_release_devq_device(dev, count, run_queue))
4342 xpt_run_devq(dev->sim->devq);
4343 mtx_unlock(&devq->send_mtx);
4347 xpt_release_devq_device(struct cam_ed *dev, u_int count, int run_queue)
4350 mtx_assert(&dev->sim->devq->send_mtx, MA_OWNED);
4351 CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE,
4352 ("xpt_release_devq_device(%d, %d) %u->%u\n", count, run_queue,
4353 dev->ccbq.queue.qfrozen_cnt, dev->ccbq.queue.qfrozen_cnt - count));
4354 if (count > dev->ccbq.queue.qfrozen_cnt) {
4356 printf("xpt_release_devq(): requested %u > present %u\n",
4357 count, dev->ccbq.queue.qfrozen_cnt);
4359 count = dev->ccbq.queue.qfrozen_cnt;
4361 dev->ccbq.queue.qfrozen_cnt -= count;
4362 if (dev->ccbq.queue.qfrozen_cnt == 0) {
4364 * No longer need to wait for a successful
4365 * command completion.
4367 dev->flags &= ~CAM_DEV_REL_ON_COMPLETE;
4369 * Remove any timeouts that might be scheduled
4370 * to release this queue.
4372 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) {
4373 callout_stop(&dev->callout);
4374 dev->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING;
4377 * Now that we are unfrozen schedule the
4378 * device so any pending transactions are
4381 xpt_schedule_devq(dev->sim->devq, dev);
4388 xpt_release_simq(struct cam_sim *sim, int run_queue)
4390 struct cam_devq *devq;
4393 mtx_lock(&devq->send_mtx);
4394 if (devq->send_queue.qfrozen_cnt <= 0) {
4396 printf("xpt_release_simq: requested 1 > present %u\n",
4397 devq->send_queue.qfrozen_cnt);
4400 devq->send_queue.qfrozen_cnt--;
4401 if (devq->send_queue.qfrozen_cnt == 0) {
4403 * If there is a timeout scheduled to release this
4404 * sim queue, remove it. The queue frozen count is
4407 if ((sim->flags & CAM_SIM_REL_TIMEOUT_PENDING) != 0){
4408 callout_stop(&sim->callout);
4409 sim->flags &= ~CAM_SIM_REL_TIMEOUT_PENDING;
4413 * Now that we are unfrozen run the send queue.
4415 xpt_run_devq(sim->devq);
4418 mtx_unlock(&devq->send_mtx);
4422 * XXX Appears to be unused.
4425 xpt_release_simq_timeout(void *arg)
4427 struct cam_sim *sim;
4429 sim = (struct cam_sim *)arg;
4430 xpt_release_simq(sim, /* run_queue */ TRUE);
4434 xpt_done(union ccb *done_ccb)
4436 struct cam_doneq *queue;
4439 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_done\n"));
4440 if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) == 0)
4443 /* Store the time the ccb was in the sim */
4444 done_ccb->ccb_h.qos.sim_data = sbinuptime() - done_ccb->ccb_h.qos.sim_data;
4445 hash = (done_ccb->ccb_h.path_id + done_ccb->ccb_h.target_id +
4446 done_ccb->ccb_h.target_lun) % cam_num_doneqs;
4447 queue = &cam_doneqs[hash];
4448 mtx_lock(&queue->cam_doneq_mtx);
4449 run = (queue->cam_doneq_sleep && STAILQ_EMPTY(&queue->cam_doneq));
4450 STAILQ_INSERT_TAIL(&queue->cam_doneq, &done_ccb->ccb_h, sim_links.stqe);
4451 done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX;
4452 mtx_unlock(&queue->cam_doneq_mtx);
4454 wakeup(&queue->cam_doneq);
4458 xpt_done_direct(union ccb *done_ccb)
4461 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_done_direct\n"));
4462 if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) == 0)
4465 /* Store the time the ccb was in the sim */
4466 done_ccb->ccb_h.qos.sim_data = sbinuptime() - done_ccb->ccb_h.qos.sim_data;
4467 xpt_done_process(&done_ccb->ccb_h);
4475 new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_WAITOK);
4480 xpt_alloc_ccb_nowait()
4484 new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_NOWAIT);
4489 xpt_free_ccb(union ccb *free_ccb)
4491 free(free_ccb, M_CAMCCB);
4496 /* Private XPT functions */
4499 * Get a CAM control block for the caller. Charge the structure to the device
4500 * referenced by the path. If we don't have sufficient resources to allocate
4501 * more ccbs, we return NULL.
4504 xpt_get_ccb_nowait(struct cam_periph *periph)
4508 new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_NOWAIT);
4509 if (new_ccb == NULL)
4511 periph->periph_allocated++;
4512 cam_ccbq_take_opening(&periph->path->device->ccbq);
4517 xpt_get_ccb(struct cam_periph *periph)
4521 cam_periph_unlock(periph);
4522 new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_WAITOK);
4523 cam_periph_lock(periph);
4524 periph->periph_allocated++;
4525 cam_ccbq_take_opening(&periph->path->device->ccbq);
4530 cam_periph_getccb(struct cam_periph *periph, u_int32_t priority)
4532 struct ccb_hdr *ccb_h;
4534 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("cam_periph_getccb\n"));
4535 cam_periph_assert(periph, MA_OWNED);
4536 while ((ccb_h = SLIST_FIRST(&periph->ccb_list)) == NULL ||
4537 ccb_h->pinfo.priority != priority) {
4538 if (priority < periph->immediate_priority) {
4539 periph->immediate_priority = priority;
4540 xpt_run_allocq(periph, 0);
4542 cam_periph_sleep(periph, &periph->ccb_list, PRIBIO,
4545 SLIST_REMOVE_HEAD(&periph->ccb_list, periph_links.sle);
4546 return ((union ccb *)ccb_h);
4550 xpt_acquire_bus(struct cam_eb *bus)
4559 xpt_release_bus(struct cam_eb *bus)
4563 KASSERT(bus->refcount >= 1, ("bus->refcount >= 1"));
4564 if (--bus->refcount > 0) {
4568 TAILQ_REMOVE(&xsoftc.xpt_busses, bus, links);
4569 xsoftc.bus_generation++;
4571 KASSERT(TAILQ_EMPTY(&bus->et_entries),
4572 ("destroying bus, but target list is not empty"));
4573 cam_sim_release(bus->sim);
4574 mtx_destroy(&bus->eb_mtx);
4575 free(bus, M_CAMXPT);
4578 static struct cam_et *
4579 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id)
4581 struct cam_et *cur_target, *target;
4583 mtx_assert(&xsoftc.xpt_topo_lock, MA_OWNED);
4584 mtx_assert(&bus->eb_mtx, MA_OWNED);
4585 target = (struct cam_et *)malloc(sizeof(*target), M_CAMXPT,
4590 TAILQ_INIT(&target->ed_entries);
4592 target->target_id = target_id;
4593 target->refcount = 1;
4594 target->generation = 0;
4595 target->luns = NULL;
4596 mtx_init(&target->luns_mtx, "CAM LUNs lock", NULL, MTX_DEF);
4597 timevalclear(&target->last_reset);
4599 * Hold a reference to our parent bus so it
4600 * will not go away before we do.
4604 /* Insertion sort into our bus's target list */
4605 cur_target = TAILQ_FIRST(&bus->et_entries);
4606 while (cur_target != NULL && cur_target->target_id < target_id)
4607 cur_target = TAILQ_NEXT(cur_target, links);
4608 if (cur_target != NULL) {
4609 TAILQ_INSERT_BEFORE(cur_target, target, links);
4611 TAILQ_INSERT_TAIL(&bus->et_entries, target, links);
4618 xpt_acquire_target(struct cam_et *target)
4620 struct cam_eb *bus = target->bus;
4622 mtx_lock(&bus->eb_mtx);
4624 mtx_unlock(&bus->eb_mtx);
4628 xpt_release_target(struct cam_et *target)
4630 struct cam_eb *bus = target->bus;
4632 mtx_lock(&bus->eb_mtx);
4633 if (--target->refcount > 0) {
4634 mtx_unlock(&bus->eb_mtx);
4637 TAILQ_REMOVE(&bus->et_entries, target, links);
4639 mtx_unlock(&bus->eb_mtx);
4640 KASSERT(TAILQ_EMPTY(&target->ed_entries),
4641 ("destroying target, but device list is not empty"));
4642 xpt_release_bus(bus);
4643 mtx_destroy(&target->luns_mtx);
4645 free(target->luns, M_CAMXPT);
4646 free(target, M_CAMXPT);
4649 static struct cam_ed *
4650 xpt_alloc_device_default(struct cam_eb *bus, struct cam_et *target,
4653 struct cam_ed *device;
4655 device = xpt_alloc_device(bus, target, lun_id);
4659 device->mintags = 1;
4660 device->maxtags = 1;
4665 xpt_destroy_device(void *context, int pending)
4667 struct cam_ed *device = context;
4669 mtx_lock(&device->device_mtx);
4670 mtx_destroy(&device->device_mtx);
4671 free(device, M_CAMDEV);
4675 xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, lun_id_t lun_id)
4677 struct cam_ed *cur_device, *device;
4678 struct cam_devq *devq;
4681 mtx_assert(&bus->eb_mtx, MA_OWNED);
4682 /* Make space for us in the device queue on our bus */
4683 devq = bus->sim->devq;
4684 mtx_lock(&devq->send_mtx);
4685 status = cam_devq_resize(devq, devq->send_queue.array_size + 1);
4686 mtx_unlock(&devq->send_mtx);
4687 if (status != CAM_REQ_CMP)
4690 device = (struct cam_ed *)malloc(sizeof(*device),
4691 M_CAMDEV, M_NOWAIT|M_ZERO);
4695 cam_init_pinfo(&device->devq_entry);
4696 device->target = target;
4697 device->lun_id = lun_id;
4698 device->sim = bus->sim;
4699 if (cam_ccbq_init(&device->ccbq,
4700 bus->sim->max_dev_openings) != 0) {
4701 free(device, M_CAMDEV);
4704 SLIST_INIT(&device->asyncs);
4705 SLIST_INIT(&device->periphs);
4706 device->generation = 0;
4707 device->flags = CAM_DEV_UNCONFIGURED;
4708 device->tag_delay_count = 0;
4709 device->tag_saved_openings = 0;
4710 device->refcount = 1;
4711 mtx_init(&device->device_mtx, "CAM device lock", NULL, MTX_DEF);
4712 callout_init_mtx(&device->callout, &devq->send_mtx, 0);
4713 TASK_INIT(&device->device_destroy_task, 0, xpt_destroy_device, device);
4715 * Hold a reference to our parent bus so it
4716 * will not go away before we do.
4720 cur_device = TAILQ_FIRST(&target->ed_entries);
4721 while (cur_device != NULL && cur_device->lun_id < lun_id)
4722 cur_device = TAILQ_NEXT(cur_device, links);
4723 if (cur_device != NULL)
4724 TAILQ_INSERT_BEFORE(cur_device, device, links);
4726 TAILQ_INSERT_TAIL(&target->ed_entries, device, links);
4727 target->generation++;
4732 xpt_acquire_device(struct cam_ed *device)
4734 struct cam_eb *bus = device->target->bus;
4736 mtx_lock(&bus->eb_mtx);
4738 mtx_unlock(&bus->eb_mtx);
4742 xpt_release_device(struct cam_ed *device)
4744 struct cam_eb *bus = device->target->bus;
4745 struct cam_devq *devq;
4747 mtx_lock(&bus->eb_mtx);
4748 if (--device->refcount > 0) {
4749 mtx_unlock(&bus->eb_mtx);
4753 TAILQ_REMOVE(&device->target->ed_entries, device,links);
4754 device->target->generation++;
4755 mtx_unlock(&bus->eb_mtx);
4757 /* Release our slot in the devq */
4758 devq = bus->sim->devq;
4759 mtx_lock(&devq->send_mtx);
4760 cam_devq_resize(devq, devq->send_queue.array_size - 1);
4761 mtx_unlock(&devq->send_mtx);
4763 KASSERT(SLIST_EMPTY(&device->periphs),
4764 ("destroying device, but periphs list is not empty"));
4765 KASSERT(device->devq_entry.index == CAM_UNQUEUED_INDEX,
4766 ("destroying device while still queued for ccbs"));
4768 if ((device->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0)
4769 callout_stop(&device->callout);
4771 xpt_release_target(device->target);
4773 cam_ccbq_fini(&device->ccbq);
4775 * Free allocated memory. free(9) does nothing if the
4776 * supplied pointer is NULL, so it is safe to call without
4779 free(device->supported_vpds, M_CAMXPT);
4780 free(device->device_id, M_CAMXPT);
4781 free(device->ext_inq, M_CAMXPT);
4782 free(device->physpath, M_CAMXPT);
4783 free(device->rcap_buf, M_CAMXPT);
4784 free(device->serial_num, M_CAMXPT);
4785 taskqueue_enqueue(xsoftc.xpt_taskq, &device->device_destroy_task);
4789 xpt_dev_ccbq_resize(struct cam_path *path, int newopenings)
4795 mtx_lock(&dev->sim->devq->send_mtx);
4796 result = cam_ccbq_resize(&dev->ccbq, newopenings);
4797 mtx_unlock(&dev->sim->devq->send_mtx);
4798 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
4799 || (dev->inq_flags & SID_CmdQue) != 0)
4800 dev->tag_saved_openings = newopenings;
4804 static struct cam_eb *
4805 xpt_find_bus(path_id_t path_id)
4810 for (bus = TAILQ_FIRST(&xsoftc.xpt_busses);
4812 bus = TAILQ_NEXT(bus, links)) {
4813 if (bus->path_id == path_id) {
4822 static struct cam_et *
4823 xpt_find_target(struct cam_eb *bus, target_id_t target_id)
4825 struct cam_et *target;
4827 mtx_assert(&bus->eb_mtx, MA_OWNED);
4828 for (target = TAILQ_FIRST(&bus->et_entries);
4830 target = TAILQ_NEXT(target, links)) {
4831 if (target->target_id == target_id) {
4839 static struct cam_ed *
4840 xpt_find_device(struct cam_et *target, lun_id_t lun_id)
4842 struct cam_ed *device;
4844 mtx_assert(&target->bus->eb_mtx, MA_OWNED);
4845 for (device = TAILQ_FIRST(&target->ed_entries);
4847 device = TAILQ_NEXT(device, links)) {
4848 if (device->lun_id == lun_id) {
4857 xpt_start_tags(struct cam_path *path)
4859 struct ccb_relsim crs;
4860 struct cam_ed *device;
4861 struct cam_sim *sim;
4864 device = path->device;
4865 sim = path->bus->sim;
4866 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT;
4867 xpt_freeze_devq(path, /*count*/1);
4868 device->inq_flags |= SID_CmdQue;
4869 if (device->tag_saved_openings != 0)
4870 newopenings = device->tag_saved_openings;
4872 newopenings = min(device->maxtags,
4873 sim->max_tagged_dev_openings);
4874 xpt_dev_ccbq_resize(path, newopenings);
4875 xpt_async(AC_GETDEV_CHANGED, path, NULL);
4876 xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL);
4877 crs.ccb_h.func_code = XPT_REL_SIMQ;
4878 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY;
4880 = crs.release_timeout
4883 xpt_action((union ccb *)&crs);
4887 xpt_stop_tags(struct cam_path *path)
4889 struct ccb_relsim crs;
4890 struct cam_ed *device;
4891 struct cam_sim *sim;
4893 device = path->device;
4894 sim = path->bus->sim;
4895 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT;
4896 device->tag_delay_count = 0;
4897 xpt_freeze_devq(path, /*count*/1);
4898 device->inq_flags &= ~SID_CmdQue;
4899 xpt_dev_ccbq_resize(path, sim->max_dev_openings);
4900 xpt_async(AC_GETDEV_CHANGED, path, NULL);
4901 xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL);
4902 crs.ccb_h.func_code = XPT_REL_SIMQ;
4903 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY;
4905 = crs.release_timeout
4908 xpt_action((union ccb *)&crs);
4912 xpt_boot_delay(void *arg)
4919 xpt_config(void *arg)
4922 * Now that interrupts are enabled, go find our devices
4924 if (taskqueue_start_threads(&xsoftc.xpt_taskq, 1, PRIBIO, "CAM taskq"))
4925 printf("xpt_config: failed to create taskqueue thread.\n");
4927 /* Setup debugging path */
4928 if (cam_dflags != CAM_DEBUG_NONE) {
4929 if (xpt_create_path(&cam_dpath, NULL,
4930 CAM_DEBUG_BUS, CAM_DEBUG_TARGET,
4931 CAM_DEBUG_LUN) != CAM_REQ_CMP) {
4932 printf("xpt_config: xpt_create_path() failed for debug"
4933 " target %d:%d:%d, debugging disabled\n",
4934 CAM_DEBUG_BUS, CAM_DEBUG_TARGET, CAM_DEBUG_LUN);
4935 cam_dflags = CAM_DEBUG_NONE;
4940 periphdriver_init(1);
4942 callout_init(&xsoftc.boot_callout, 1);
4943 callout_reset_sbt(&xsoftc.boot_callout, SBT_1MS * xsoftc.boot_delay, 0,
4944 xpt_boot_delay, NULL, 0);
4945 /* Fire up rescan thread. */
4946 if (kproc_kthread_add(xpt_scanner_thread, NULL, &cam_proc, NULL, 0, 0,
4947 "cam", "scanner")) {
4948 printf("xpt_config: failed to create rescan thread.\n");
4956 xsoftc.buses_to_config++;
4961 xpt_release_boot(void)
4964 xsoftc.buses_to_config--;
4965 if (xsoftc.buses_to_config == 0 && xsoftc.buses_config_done == 0) {
4966 struct xpt_task *task;
4968 xsoftc.buses_config_done = 1;
4970 /* Call manually because we don't have any busses */
4971 task = malloc(sizeof(struct xpt_task), M_CAMXPT, M_NOWAIT);
4973 TASK_INIT(&task->task, 0, xpt_finishconfig_task, task);
4974 taskqueue_enqueue(taskqueue_thread, &task->task);
4981 * If the given device only has one peripheral attached to it, and if that
4982 * peripheral is the passthrough driver, announce it. This insures that the
4983 * user sees some sort of announcement for every peripheral in their system.
4986 xptpassannouncefunc(struct cam_ed *device, void *arg)
4988 struct cam_periph *periph;
4991 for (periph = SLIST_FIRST(&device->periphs), i = 0; periph != NULL;
4992 periph = SLIST_NEXT(periph, periph_links), i++);
4994 periph = SLIST_FIRST(&device->periphs);
4996 && (strncmp(periph->periph_name, "pass", 4) == 0))
4997 xpt_announce_periph(periph, NULL);
5003 xpt_finishconfig_task(void *context, int pending)
5006 periphdriver_init(2);
5008 * Check for devices with no "standard" peripheral driver
5009 * attached. For any devices like that, announce the
5010 * passthrough driver so the user will see something.
5013 xpt_for_all_devices(xptpassannouncefunc, NULL);
5015 /* Release our hook so that the boot can continue. */
5016 config_intrhook_disestablish(xsoftc.xpt_config_hook);
5017 free(xsoftc.xpt_config_hook, M_CAMXPT);
5018 xsoftc.xpt_config_hook = NULL;
5020 free(context, M_CAMXPT);
5024 xpt_register_async(int event, ac_callback_t *cbfunc, void *cbarg,
5025 struct cam_path *path)
5027 struct ccb_setasync csa;
5032 status = xpt_create_path(&path, /*periph*/NULL, CAM_XPT_PATH_ID,
5033 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
5034 if (status != CAM_REQ_CMP)
5036 xpt_path_lock(path);
5040 xpt_setup_ccb(&csa.ccb_h, path, CAM_PRIORITY_NORMAL);
5041 csa.ccb_h.func_code = XPT_SASYNC_CB;
5042 csa.event_enable = event;
5043 csa.callback = cbfunc;
5044 csa.callback_arg = cbarg;
5045 xpt_action((union ccb *)&csa);
5046 status = csa.ccb_h.status;
5049 xpt_path_unlock(path);
5050 xpt_free_path(path);
5053 if ((status == CAM_REQ_CMP) &&
5054 (csa.event_enable & AC_FOUND_DEVICE)) {
5056 * Get this peripheral up to date with all
5057 * the currently existing devices.
5059 xpt_for_all_devices(xptsetasyncfunc, &csa);
5061 if ((status == CAM_REQ_CMP) &&
5062 (csa.event_enable & AC_PATH_REGISTERED)) {
5064 * Get this peripheral up to date with all
5065 * the currently existing busses.
5067 xpt_for_all_busses(xptsetasyncbusfunc, &csa);
5074 xptaction(struct cam_sim *sim, union ccb *work_ccb)
5076 CAM_DEBUG(work_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xptaction\n"));
5078 switch (work_ccb->ccb_h.func_code) {
5079 /* Common cases first */
5080 case XPT_PATH_INQ: /* Path routing inquiry */
5082 struct ccb_pathinq *cpi;
5084 cpi = &work_ccb->cpi;
5085 cpi->version_num = 1; /* XXX??? */
5086 cpi->hba_inquiry = 0;
5087 cpi->target_sprt = 0;
5089 cpi->hba_eng_cnt = 0;
5090 cpi->max_target = 0;
5092 cpi->initiator_id = 0;
5093 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
5094 strncpy(cpi->hba_vid, "", HBA_IDLEN);
5095 strncpy(cpi->dev_name, sim->sim_name, DEV_IDLEN);
5096 cpi->unit_number = sim->unit_number;
5097 cpi->bus_id = sim->bus_id;
5098 cpi->base_transfer_speed = 0;
5099 cpi->protocol = PROTO_UNSPECIFIED;
5100 cpi->protocol_version = PROTO_VERSION_UNSPECIFIED;
5101 cpi->transport = XPORT_UNSPECIFIED;
5102 cpi->transport_version = XPORT_VERSION_UNSPECIFIED;
5103 cpi->ccb_h.status = CAM_REQ_CMP;
5108 work_ccb->ccb_h.status = CAM_REQ_INVALID;
5115 * The xpt as a "controller" has no interrupt sources, so polling
5119 xptpoll(struct cam_sim *sim)
5124 xpt_lock_buses(void)
5126 mtx_lock(&xsoftc.xpt_topo_lock);
5130 xpt_unlock_buses(void)
5132 mtx_unlock(&xsoftc.xpt_topo_lock);
5136 xpt_path_mtx(struct cam_path *path)
5139 return (&path->device->device_mtx);
5143 xpt_done_process(struct ccb_hdr *ccb_h)
5145 struct cam_sim *sim;
5146 struct cam_devq *devq;
5147 struct mtx *mtx = NULL;
5149 if (ccb_h->flags & CAM_HIGH_POWER) {
5150 struct highpowerlist *hphead;
5151 struct cam_ed *device;
5153 mtx_lock(&xsoftc.xpt_highpower_lock);
5154 hphead = &xsoftc.highpowerq;
5156 device = STAILQ_FIRST(hphead);
5159 * Increment the count since this command is done.
5161 xsoftc.num_highpower++;
5164 * Any high powered commands queued up?
5166 if (device != NULL) {
5168 STAILQ_REMOVE_HEAD(hphead, highpowerq_entry);
5169 mtx_unlock(&xsoftc.xpt_highpower_lock);
5171 mtx_lock(&device->sim->devq->send_mtx);
5172 xpt_release_devq_device(device,
5173 /*count*/1, /*runqueue*/TRUE);
5174 mtx_unlock(&device->sim->devq->send_mtx);
5176 mtx_unlock(&xsoftc.xpt_highpower_lock);
5179 sim = ccb_h->path->bus->sim;
5181 if (ccb_h->status & CAM_RELEASE_SIMQ) {
5182 xpt_release_simq(sim, /*run_queue*/FALSE);
5183 ccb_h->status &= ~CAM_RELEASE_SIMQ;
5186 if ((ccb_h->flags & CAM_DEV_QFRZDIS)
5187 && (ccb_h->status & CAM_DEV_QFRZN)) {
5188 xpt_release_devq(ccb_h->path, /*count*/1, /*run_queue*/TRUE);
5189 ccb_h->status &= ~CAM_DEV_QFRZN;
5193 if ((ccb_h->func_code & XPT_FC_USER_CCB) == 0) {
5194 struct cam_ed *dev = ccb_h->path->device;
5196 mtx_lock(&devq->send_mtx);
5197 devq->send_active--;
5198 devq->send_openings++;
5199 cam_ccbq_ccb_done(&dev->ccbq, (union ccb *)ccb_h);
5201 if (((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0
5202 && (dev->ccbq.dev_active == 0))) {
5203 dev->flags &= ~CAM_DEV_REL_ON_QUEUE_EMPTY;
5204 xpt_release_devq_device(dev, /*count*/1,
5205 /*run_queue*/FALSE);
5208 if (((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0
5209 && (ccb_h->status&CAM_STATUS_MASK) != CAM_REQUEUE_REQ)) {
5210 dev->flags &= ~CAM_DEV_REL_ON_COMPLETE;
5211 xpt_release_devq_device(dev, /*count*/1,
5212 /*run_queue*/FALSE);
5215 if (!device_is_queued(dev))
5216 (void)xpt_schedule_devq(devq, dev);
5218 mtx_unlock(&devq->send_mtx);
5220 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0) {
5221 mtx = xpt_path_mtx(ccb_h->path);
5224 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
5225 && (--dev->tag_delay_count == 0))
5226 xpt_start_tags(ccb_h->path);
5230 if ((ccb_h->flags & CAM_UNLOCKED) == 0) {
5232 mtx = xpt_path_mtx(ccb_h->path);
5242 /* Call the peripheral driver's callback */
5243 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX;
5244 (*ccb_h->cbfcnp)(ccb_h->path->periph, (union ccb *)ccb_h);
5250 xpt_done_td(void *arg)
5252 struct cam_doneq *queue = arg;
5253 struct ccb_hdr *ccb_h;
5254 STAILQ_HEAD(, ccb_hdr) doneq;
5256 STAILQ_INIT(&doneq);
5257 mtx_lock(&queue->cam_doneq_mtx);
5259 while (STAILQ_EMPTY(&queue->cam_doneq)) {
5260 queue->cam_doneq_sleep = 1;
5261 msleep(&queue->cam_doneq, &queue->cam_doneq_mtx,
5263 queue->cam_doneq_sleep = 0;
5265 STAILQ_CONCAT(&doneq, &queue->cam_doneq);
5266 mtx_unlock(&queue->cam_doneq_mtx);
5268 THREAD_NO_SLEEPING();
5269 while ((ccb_h = STAILQ_FIRST(&doneq)) != NULL) {
5270 STAILQ_REMOVE_HEAD(&doneq, sim_links.stqe);
5271 xpt_done_process(ccb_h);
5273 THREAD_SLEEPING_OK();
5275 mtx_lock(&queue->cam_doneq_mtx);
5280 camisr_runqueue(void)
5282 struct ccb_hdr *ccb_h;
5283 struct cam_doneq *queue;
5286 /* Process global queues. */
5287 for (i = 0; i < cam_num_doneqs; i++) {
5288 queue = &cam_doneqs[i];
5289 mtx_lock(&queue->cam_doneq_mtx);
5290 while ((ccb_h = STAILQ_FIRST(&queue->cam_doneq)) != NULL) {
5291 STAILQ_REMOVE_HEAD(&queue->cam_doneq, sim_links.stqe);
5292 mtx_unlock(&queue->cam_doneq_mtx);
5293 xpt_done_process(ccb_h);
5294 mtx_lock(&queue->cam_doneq_mtx);
5296 mtx_unlock(&queue->cam_doneq_mtx);