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 TUNABLE_INT("kern.cam.boot_delay", &xsoftc.boot_delay);
157 SYSCTL_INT(_kern_cam, OID_AUTO, boot_delay, CTLFLAG_RDTUN,
158 &xsoftc.boot_delay, 0, "Bus registration wait time");
159 SYSCTL_UINT(_kern_cam, OID_AUTO, xpt_generation, CTLFLAG_RD,
160 &xsoftc.xpt_generation, 0, "CAM peripheral generation count");
163 struct mtx_padalign cam_doneq_mtx;
164 STAILQ_HEAD(, ccb_hdr) cam_doneq;
168 static struct cam_doneq cam_doneqs[MAXCPU];
169 static int cam_num_doneqs;
170 static struct proc *cam_proc;
172 TUNABLE_INT("kern.cam.num_doneqs", &cam_num_doneqs);
173 SYSCTL_INT(_kern_cam, OID_AUTO, num_doneqs, CTLFLAG_RDTUN,
174 &cam_num_doneqs, 0, "Number of completion queues/threads");
176 struct cam_periph *xpt_periph;
178 static periph_init_t xpt_periph_init;
180 static struct periph_driver xpt_driver =
182 xpt_periph_init, "xpt",
183 TAILQ_HEAD_INITIALIZER(xpt_driver.units), /* generation */ 0,
187 PERIPHDRIVER_DECLARE(xpt, xpt_driver);
189 static d_open_t xptopen;
190 static d_close_t xptclose;
191 static d_ioctl_t xptioctl;
192 static d_ioctl_t xptdoioctl;
194 static struct cdevsw xpt_cdevsw = {
195 .d_version = D_VERSION,
203 /* Storage for debugging datastructures */
204 struct cam_path *cam_dpath;
205 u_int32_t cam_dflags = CAM_DEBUG_FLAGS;
206 TUNABLE_INT("kern.cam.dflags", &cam_dflags);
207 SYSCTL_UINT(_kern_cam, OID_AUTO, dflags, CTLFLAG_RW,
208 &cam_dflags, 0, "Enabled debug flags");
209 u_int32_t cam_debug_delay = CAM_DEBUG_DELAY;
210 TUNABLE_INT("kern.cam.debug_delay", &cam_debug_delay);
211 SYSCTL_UINT(_kern_cam, OID_AUTO, debug_delay, CTLFLAG_RW,
212 &cam_debug_delay, 0, "Delay in us after each debug message");
214 /* Our boot-time initialization hook */
215 static int cam_module_event_handler(module_t, int /*modeventtype_t*/, void *);
217 static moduledata_t cam_moduledata = {
219 cam_module_event_handler,
223 static int xpt_init(void *);
225 DECLARE_MODULE(cam, cam_moduledata, SI_SUB_CONFIGURE, SI_ORDER_SECOND);
226 MODULE_VERSION(cam, 1);
229 static void xpt_async_bcast(struct async_list *async_head,
230 u_int32_t async_code,
231 struct cam_path *path,
233 static path_id_t xptnextfreepathid(void);
234 static path_id_t xptpathid(const char *sim_name, int sim_unit, int sim_bus);
235 static union ccb *xpt_get_ccb(struct cam_periph *periph);
236 static union ccb *xpt_get_ccb_nowait(struct cam_periph *periph);
237 static void xpt_run_allocq(struct cam_periph *periph, int sleep);
238 static void xpt_run_allocq_task(void *context, int pending);
239 static void xpt_run_devq(struct cam_devq *devq);
240 static timeout_t xpt_release_devq_timeout;
241 static void xpt_release_simq_timeout(void *arg) __unused;
242 static void xpt_acquire_bus(struct cam_eb *bus);
243 static void xpt_release_bus(struct cam_eb *bus);
244 static uint32_t xpt_freeze_devq_device(struct cam_ed *dev, u_int count);
245 static int xpt_release_devq_device(struct cam_ed *dev, u_int count,
247 static struct cam_et*
248 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id);
249 static void xpt_acquire_target(struct cam_et *target);
250 static void xpt_release_target(struct cam_et *target);
251 static struct cam_eb*
252 xpt_find_bus(path_id_t path_id);
253 static struct cam_et*
254 xpt_find_target(struct cam_eb *bus, target_id_t target_id);
255 static struct cam_ed*
256 xpt_find_device(struct cam_et *target, lun_id_t lun_id);
257 static void xpt_config(void *arg);
258 static int xpt_schedule_dev(struct camq *queue, cam_pinfo *dev_pinfo,
259 u_int32_t new_priority);
260 static xpt_devicefunc_t xptpassannouncefunc;
261 static void xptaction(struct cam_sim *sim, union ccb *work_ccb);
262 static void xptpoll(struct cam_sim *sim);
263 static void camisr_runqueue(void);
264 static void xpt_done_process(struct ccb_hdr *ccb_h);
265 static void xpt_done_td(void *);
266 static dev_match_ret xptbusmatch(struct dev_match_pattern *patterns,
267 u_int num_patterns, struct cam_eb *bus);
268 static dev_match_ret xptdevicematch(struct dev_match_pattern *patterns,
270 struct cam_ed *device);
271 static dev_match_ret xptperiphmatch(struct dev_match_pattern *patterns,
273 struct cam_periph *periph);
274 static xpt_busfunc_t xptedtbusfunc;
275 static xpt_targetfunc_t xptedttargetfunc;
276 static xpt_devicefunc_t xptedtdevicefunc;
277 static xpt_periphfunc_t xptedtperiphfunc;
278 static xpt_pdrvfunc_t xptplistpdrvfunc;
279 static xpt_periphfunc_t xptplistperiphfunc;
280 static int xptedtmatch(struct ccb_dev_match *cdm);
281 static int xptperiphlistmatch(struct ccb_dev_match *cdm);
282 static int xptbustraverse(struct cam_eb *start_bus,
283 xpt_busfunc_t *tr_func, void *arg);
284 static int xpttargettraverse(struct cam_eb *bus,
285 struct cam_et *start_target,
286 xpt_targetfunc_t *tr_func, void *arg);
287 static int xptdevicetraverse(struct cam_et *target,
288 struct cam_ed *start_device,
289 xpt_devicefunc_t *tr_func, void *arg);
290 static int xptperiphtraverse(struct cam_ed *device,
291 struct cam_periph *start_periph,
292 xpt_periphfunc_t *tr_func, void *arg);
293 static int xptpdrvtraverse(struct periph_driver **start_pdrv,
294 xpt_pdrvfunc_t *tr_func, void *arg);
295 static int xptpdperiphtraverse(struct periph_driver **pdrv,
296 struct cam_periph *start_periph,
297 xpt_periphfunc_t *tr_func,
299 static xpt_busfunc_t xptdefbusfunc;
300 static xpt_targetfunc_t xptdeftargetfunc;
301 static xpt_devicefunc_t xptdefdevicefunc;
302 static xpt_periphfunc_t xptdefperiphfunc;
303 static void xpt_finishconfig_task(void *context, int pending);
304 static void xpt_dev_async_default(u_int32_t async_code,
306 struct cam_et *target,
307 struct cam_ed *device,
309 static struct cam_ed * xpt_alloc_device_default(struct cam_eb *bus,
310 struct cam_et *target,
312 static xpt_devicefunc_t xptsetasyncfunc;
313 static xpt_busfunc_t xptsetasyncbusfunc;
314 static cam_status xptregister(struct cam_periph *periph,
316 static __inline int device_is_queued(struct cam_ed *device);
319 xpt_schedule_devq(struct cam_devq *devq, struct cam_ed *dev)
323 mtx_assert(&devq->send_mtx, MA_OWNED);
324 if ((dev->ccbq.queue.entries > 0) &&
325 (dev->ccbq.dev_openings > 0) &&
326 (dev->ccbq.queue.qfrozen_cnt == 0)) {
328 * The priority of a device waiting for controller
329 * resources is that of the highest priority CCB
333 xpt_schedule_dev(&devq->send_queue,
335 CAMQ_GET_PRIO(&dev->ccbq.queue));
343 device_is_queued(struct cam_ed *device)
345 return (device->devq_entry.index != CAM_UNQUEUED_INDEX);
351 make_dev(&xpt_cdevsw, 0, UID_ROOT, GID_OPERATOR, 0600, "xpt0");
355 xptopen(struct cdev *dev, int flags, int fmt, struct thread *td)
359 * Only allow read-write access.
361 if (((flags & FWRITE) == 0) || ((flags & FREAD) == 0))
365 * We don't allow nonblocking access.
367 if ((flags & O_NONBLOCK) != 0) {
368 printf("%s: can't do nonblocking access\n", devtoname(dev));
376 xptclose(struct cdev *dev, int flag, int fmt, struct thread *td)
383 * Don't automatically grab the xpt softc lock here even though this is going
384 * through the xpt device. The xpt device is really just a back door for
385 * accessing other devices and SIMs, so the right thing to do is to grab
386 * the appropriate SIM lock once the bus/SIM is located.
389 xptioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
393 if ((error = xptdoioctl(dev, cmd, addr, flag, td)) == ENOTTY) {
394 error = cam_compat_ioctl(dev, cmd, addr, flag, td, xptdoioctl);
400 xptdoioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
408 * For the transport layer CAMIOCOMMAND ioctl, we really only want
409 * to accept CCB types that don't quite make sense to send through a
410 * passthrough driver. XPT_PATH_INQ is an exception to this, as stated
418 inccb = (union ccb *)addr;
420 bus = xpt_find_bus(inccb->ccb_h.path_id);
424 switch (inccb->ccb_h.func_code) {
427 if (inccb->ccb_h.target_id != CAM_TARGET_WILDCARD ||
428 inccb->ccb_h.target_lun != CAM_LUN_WILDCARD) {
429 xpt_release_bus(bus);
434 if (inccb->ccb_h.target_id == CAM_TARGET_WILDCARD ||
435 inccb->ccb_h.target_lun != CAM_LUN_WILDCARD) {
436 xpt_release_bus(bus);
444 switch(inccb->ccb_h.func_code) {
452 ccb = xpt_alloc_ccb();
455 * Create a path using the bus, target, and lun the
458 if (xpt_create_path(&ccb->ccb_h.path, NULL,
459 inccb->ccb_h.path_id,
460 inccb->ccb_h.target_id,
461 inccb->ccb_h.target_lun) !=
467 /* Ensure all of our fields are correct */
468 xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path,
469 inccb->ccb_h.pinfo.priority);
470 xpt_merge_ccb(ccb, inccb);
471 xpt_path_lock(ccb->ccb_h.path);
472 cam_periph_runccb(ccb, NULL, 0, 0, NULL);
473 xpt_path_unlock(ccb->ccb_h.path);
474 bcopy(ccb, inccb, sizeof(union ccb));
475 xpt_free_path(ccb->ccb_h.path);
483 * This is an immediate CCB, so it's okay to
484 * allocate it on the stack.
488 * Create a path using the bus, target, and lun the
491 if (xpt_create_path(&ccb.ccb_h.path, NULL,
492 inccb->ccb_h.path_id,
493 inccb->ccb_h.target_id,
494 inccb->ccb_h.target_lun) !=
499 /* Ensure all of our fields are correct */
500 xpt_setup_ccb(&ccb.ccb_h, ccb.ccb_h.path,
501 inccb->ccb_h.pinfo.priority);
502 xpt_merge_ccb(&ccb, inccb);
504 bcopy(&ccb, inccb, sizeof(union ccb));
505 xpt_free_path(ccb.ccb_h.path);
509 case XPT_DEV_MATCH: {
510 struct cam_periph_map_info mapinfo;
511 struct cam_path *old_path;
514 * We can't deal with physical addresses for this
515 * type of transaction.
517 if ((inccb->ccb_h.flags & CAM_DATA_MASK) !=
524 * Save this in case the caller had it set to
525 * something in particular.
527 old_path = inccb->ccb_h.path;
530 * We really don't need a path for the matching
531 * code. The path is needed because of the
532 * debugging statements in xpt_action(). They
533 * assume that the CCB has a valid path.
535 inccb->ccb_h.path = xpt_periph->path;
537 bzero(&mapinfo, sizeof(mapinfo));
540 * Map the pattern and match buffers into kernel
541 * virtual address space.
543 error = cam_periph_mapmem(inccb, &mapinfo, MAXPHYS);
546 inccb->ccb_h.path = old_path;
551 * This is an immediate CCB, we can send it on directly.
556 * Map the buffers back into user space.
558 cam_periph_unmapmem(inccb, &mapinfo);
560 inccb->ccb_h.path = old_path;
569 xpt_release_bus(bus);
573 * This is the getpassthru ioctl. It takes a XPT_GDEVLIST ccb as input,
574 * with the periphal driver name and unit name filled in. The other
575 * fields don't really matter as input. The passthrough driver name
576 * ("pass"), and unit number are passed back in the ccb. The current
577 * device generation number, and the index into the device peripheral
578 * driver list, and the status are also passed back. Note that
579 * since we do everything in one pass, unlike the XPT_GDEVLIST ccb,
580 * we never return a status of CAM_GDEVLIST_LIST_CHANGED. It is
581 * (or rather should be) impossible for the device peripheral driver
582 * list to change since we look at the whole thing in one pass, and
583 * we do it with lock protection.
586 case CAMGETPASSTHRU: {
588 struct cam_periph *periph;
589 struct periph_driver **p_drv;
592 int base_periph_found;
594 ccb = (union ccb *)addr;
595 unit = ccb->cgdl.unit_number;
596 name = ccb->cgdl.periph_name;
597 base_periph_found = 0;
600 * Sanity check -- make sure we don't get a null peripheral
603 if (*ccb->cgdl.periph_name == '\0') {
608 /* Keep the list from changing while we traverse it */
611 /* first find our driver in the list of drivers */
612 for (p_drv = periph_drivers; *p_drv != NULL; p_drv++)
613 if (strcmp((*p_drv)->driver_name, name) == 0)
616 if (*p_drv == NULL) {
618 ccb->ccb_h.status = CAM_REQ_CMP_ERR;
619 ccb->cgdl.status = CAM_GDEVLIST_ERROR;
620 *ccb->cgdl.periph_name = '\0';
621 ccb->cgdl.unit_number = 0;
627 * Run through every peripheral instance of this driver
628 * and check to see whether it matches the unit passed
629 * in by the user. If it does, get out of the loops and
630 * find the passthrough driver associated with that
633 for (periph = TAILQ_FIRST(&(*p_drv)->units); periph != NULL;
634 periph = TAILQ_NEXT(periph, unit_links)) {
636 if (periph->unit_number == unit)
640 * If we found the peripheral driver that the user passed
641 * in, go through all of the peripheral drivers for that
642 * particular device and look for a passthrough driver.
644 if (periph != NULL) {
645 struct cam_ed *device;
648 base_periph_found = 1;
649 device = periph->path->device;
650 for (i = 0, periph = SLIST_FIRST(&device->periphs);
652 periph = SLIST_NEXT(periph, periph_links), i++) {
654 * Check to see whether we have a
655 * passthrough device or not.
657 if (strcmp(periph->periph_name, "pass") == 0) {
659 * Fill in the getdevlist fields.
661 strcpy(ccb->cgdl.periph_name,
662 periph->periph_name);
663 ccb->cgdl.unit_number =
665 if (SLIST_NEXT(periph, periph_links))
667 CAM_GDEVLIST_MORE_DEVS;
670 CAM_GDEVLIST_LAST_DEVICE;
671 ccb->cgdl.generation =
675 * Fill in some CCB header fields
676 * that the user may want.
679 periph->path->bus->path_id;
680 ccb->ccb_h.target_id =
681 periph->path->target->target_id;
682 ccb->ccb_h.target_lun =
683 periph->path->device->lun_id;
684 ccb->ccb_h.status = CAM_REQ_CMP;
691 * If the periph is null here, one of two things has
692 * happened. The first possibility is that we couldn't
693 * find the unit number of the particular peripheral driver
694 * that the user is asking about. e.g. the user asks for
695 * the passthrough driver for "da11". We find the list of
696 * "da" peripherals all right, but there is no unit 11.
697 * The other possibility is that we went through the list
698 * of peripheral drivers attached to the device structure,
699 * but didn't find one with the name "pass". Either way,
700 * we return ENOENT, since we couldn't find something.
702 if (periph == NULL) {
703 ccb->ccb_h.status = CAM_REQ_CMP_ERR;
704 ccb->cgdl.status = CAM_GDEVLIST_ERROR;
705 *ccb->cgdl.periph_name = '\0';
706 ccb->cgdl.unit_number = 0;
709 * It is unfortunate that this is even necessary,
710 * but there are many, many clueless users out there.
711 * If this is true, the user is looking for the
712 * passthrough driver, but doesn't have one in his
715 if (base_periph_found == 1) {
716 printf("xptioctl: pass driver is not in the "
718 printf("xptioctl: put \"device pass\" in "
719 "your kernel config file\n");
734 cam_module_event_handler(module_t mod, int what, void *arg)
740 if ((error = xpt_init(NULL)) != 0)
753 xpt_rescan_done(struct cam_periph *periph, union ccb *done_ccb)
756 if (done_ccb->ccb_h.ppriv_ptr1 == NULL) {
757 xpt_free_path(done_ccb->ccb_h.path);
758 xpt_free_ccb(done_ccb);
760 done_ccb->ccb_h.cbfcnp = done_ccb->ccb_h.ppriv_ptr1;
761 (*done_ccb->ccb_h.cbfcnp)(periph, done_ccb);
766 /* thread to handle bus rescans */
768 xpt_scanner_thread(void *dummy)
771 struct cam_path path;
775 if (TAILQ_EMPTY(&xsoftc.ccb_scanq))
776 msleep(&xsoftc.ccb_scanq, &xsoftc.xpt_topo_lock, PRIBIO,
778 if ((ccb = (union ccb *)TAILQ_FIRST(&xsoftc.ccb_scanq)) != NULL) {
779 TAILQ_REMOVE(&xsoftc.ccb_scanq, &ccb->ccb_h, sim_links.tqe);
783 * Since lock can be dropped inside and path freed
784 * by completion callback even before return here,
785 * take our own path copy for reference.
787 xpt_copy_path(&path, ccb->ccb_h.path);
788 xpt_path_lock(&path);
790 xpt_path_unlock(&path);
791 xpt_release_path(&path);
799 xpt_rescan(union ccb *ccb)
803 /* Prepare request */
804 if (ccb->ccb_h.path->target->target_id == CAM_TARGET_WILDCARD &&
805 ccb->ccb_h.path->device->lun_id == CAM_LUN_WILDCARD)
806 ccb->ccb_h.func_code = XPT_SCAN_BUS;
807 else if (ccb->ccb_h.path->target->target_id != CAM_TARGET_WILDCARD &&
808 ccb->ccb_h.path->device->lun_id == CAM_LUN_WILDCARD)
809 ccb->ccb_h.func_code = XPT_SCAN_TGT;
810 else if (ccb->ccb_h.path->target->target_id != CAM_TARGET_WILDCARD &&
811 ccb->ccb_h.path->device->lun_id != CAM_LUN_WILDCARD)
812 ccb->ccb_h.func_code = XPT_SCAN_LUN;
814 xpt_print(ccb->ccb_h.path, "illegal scan path\n");
815 xpt_free_path(ccb->ccb_h.path);
819 ccb->ccb_h.ppriv_ptr1 = ccb->ccb_h.cbfcnp;
820 ccb->ccb_h.cbfcnp = xpt_rescan_done;
821 xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path, CAM_PRIORITY_XPT);
822 /* Don't make duplicate entries for the same paths. */
824 if (ccb->ccb_h.ppriv_ptr1 == NULL) {
825 TAILQ_FOREACH(hdr, &xsoftc.ccb_scanq, sim_links.tqe) {
826 if (xpt_path_comp(hdr->path, ccb->ccb_h.path) == 0) {
827 wakeup(&xsoftc.ccb_scanq);
829 xpt_print(ccb->ccb_h.path, "rescan already queued\n");
830 xpt_free_path(ccb->ccb_h.path);
836 TAILQ_INSERT_TAIL(&xsoftc.ccb_scanq, &ccb->ccb_h, sim_links.tqe);
837 xsoftc.buses_to_config++;
838 wakeup(&xsoftc.ccb_scanq);
842 /* Functions accessed by the peripheral drivers */
844 xpt_init(void *dummy)
846 struct cam_sim *xpt_sim;
847 struct cam_path *path;
848 struct cam_devq *devq;
852 TAILQ_INIT(&xsoftc.xpt_busses);
853 TAILQ_INIT(&xsoftc.ccb_scanq);
854 STAILQ_INIT(&xsoftc.highpowerq);
855 xsoftc.num_highpower = CAM_MAX_HIGHPOWER;
857 mtx_init(&xsoftc.xpt_lock, "XPT lock", NULL, MTX_DEF);
858 mtx_init(&xsoftc.xpt_highpower_lock, "XPT highpower lock", NULL, MTX_DEF);
859 xsoftc.xpt_taskq = taskqueue_create("CAM XPT task", M_WAITOK,
860 taskqueue_thread_enqueue, /*context*/&xsoftc.xpt_taskq);
862 #ifdef CAM_BOOT_DELAY
864 * Override this value at compile time to assist our users
865 * who don't use loader to boot a kernel.
867 xsoftc.boot_delay = CAM_BOOT_DELAY;
870 * The xpt layer is, itself, the equivalent of a SIM.
871 * Allow 16 ccbs in the ccb pool for it. This should
872 * give decent parallelism when we probe busses and
873 * perform other XPT functions.
875 devq = cam_simq_alloc(16);
876 xpt_sim = cam_sim_alloc(xptaction,
881 /*mtx*/&xsoftc.xpt_lock,
882 /*max_dev_transactions*/0,
883 /*max_tagged_dev_transactions*/0,
888 mtx_lock(&xsoftc.xpt_lock);
889 if ((status = xpt_bus_register(xpt_sim, NULL, 0)) != CAM_SUCCESS) {
890 mtx_unlock(&xsoftc.xpt_lock);
891 printf("xpt_init: xpt_bus_register failed with status %#x,"
892 " failing attach\n", status);
895 mtx_unlock(&xsoftc.xpt_lock);
898 * Looking at the XPT from the SIM layer, the XPT is
899 * the equivalent of a peripheral driver. Allocate
900 * a peripheral driver entry for us.
902 if ((status = xpt_create_path(&path, NULL, CAM_XPT_PATH_ID,
904 CAM_LUN_WILDCARD)) != CAM_REQ_CMP) {
905 printf("xpt_init: xpt_create_path failed with status %#x,"
906 " failing attach\n", status);
910 cam_periph_alloc(xptregister, NULL, NULL, NULL, "xpt", CAM_PERIPH_BIO,
911 path, NULL, 0, xpt_sim);
912 xpt_path_unlock(path);
915 if (cam_num_doneqs < 1)
916 cam_num_doneqs = 1 + mp_ncpus / 6;
917 else if (cam_num_doneqs > MAXCPU)
918 cam_num_doneqs = MAXCPU;
919 for (i = 0; i < cam_num_doneqs; i++) {
920 mtx_init(&cam_doneqs[i].cam_doneq_mtx, "CAM doneq", NULL,
922 STAILQ_INIT(&cam_doneqs[i].cam_doneq);
923 error = kproc_kthread_add(xpt_done_td, &cam_doneqs[i],
924 &cam_proc, NULL, 0, 0, "cam", "doneq%d", i);
930 if (cam_num_doneqs < 1) {
931 printf("xpt_init: Cannot init completion queues "
932 "- failing attach\n");
936 * Register a callback for when interrupts are enabled.
938 xsoftc.xpt_config_hook =
939 (struct intr_config_hook *)malloc(sizeof(struct intr_config_hook),
940 M_CAMXPT, M_NOWAIT | M_ZERO);
941 if (xsoftc.xpt_config_hook == NULL) {
942 printf("xpt_init: Cannot malloc config hook "
943 "- failing attach\n");
946 xsoftc.xpt_config_hook->ich_func = xpt_config;
947 if (config_intrhook_establish(xsoftc.xpt_config_hook) != 0) {
948 free (xsoftc.xpt_config_hook, M_CAMXPT);
949 printf("xpt_init: config_intrhook_establish failed "
950 "- failing attach\n");
957 xptregister(struct cam_periph *periph, void *arg)
959 struct cam_sim *xpt_sim;
961 if (periph == NULL) {
962 printf("xptregister: periph was NULL!!\n");
963 return(CAM_REQ_CMP_ERR);
966 xpt_sim = (struct cam_sim *)arg;
967 xpt_sim->softc = periph;
969 periph->softc = NULL;
975 xpt_add_periph(struct cam_periph *periph)
977 struct cam_ed *device;
980 TASK_INIT(&periph->periph_run_task, 0, xpt_run_allocq_task, periph);
981 device = periph->path->device;
982 status = CAM_REQ_CMP;
983 if (device != NULL) {
984 mtx_lock(&device->target->bus->eb_mtx);
985 device->generation++;
986 SLIST_INSERT_HEAD(&device->periphs, periph, periph_links);
987 mtx_unlock(&device->target->bus->eb_mtx);
988 atomic_add_32(&xsoftc.xpt_generation, 1);
995 xpt_remove_periph(struct cam_periph *periph)
997 struct cam_ed *device;
999 device = periph->path->device;
1000 if (device != NULL) {
1001 mtx_lock(&device->target->bus->eb_mtx);
1002 device->generation++;
1003 SLIST_REMOVE(&device->periphs, periph, cam_periph, periph_links);
1004 mtx_unlock(&device->target->bus->eb_mtx);
1005 atomic_add_32(&xsoftc.xpt_generation, 1);
1011 xpt_announce_periph(struct cam_periph *periph, char *announce_string)
1013 struct cam_path *path = periph->path;
1015 cam_periph_assert(periph, MA_OWNED);
1016 periph->flags |= CAM_PERIPH_ANNOUNCED;
1018 printf("%s%d at %s%d bus %d scbus%d target %d lun %jx\n",
1019 periph->periph_name, periph->unit_number,
1020 path->bus->sim->sim_name,
1021 path->bus->sim->unit_number,
1022 path->bus->sim->bus_id,
1024 path->target->target_id,
1025 (uintmax_t)path->device->lun_id);
1026 printf("%s%d: ", periph->periph_name, periph->unit_number);
1027 if (path->device->protocol == PROTO_SCSI)
1028 scsi_print_inquiry(&path->device->inq_data);
1029 else if (path->device->protocol == PROTO_ATA ||
1030 path->device->protocol == PROTO_SATAPM)
1031 ata_print_ident(&path->device->ident_data);
1032 else if (path->device->protocol == PROTO_SEMB)
1034 (struct sep_identify_data *)&path->device->ident_data);
1036 printf("Unknown protocol device\n");
1037 if (path->device->serial_num_len > 0) {
1038 /* Don't wrap the screen - print only the first 60 chars */
1039 printf("%s%d: Serial Number %.60s\n", periph->periph_name,
1040 periph->unit_number, path->device->serial_num);
1042 /* Announce transport details. */
1043 (*(path->bus->xport->announce))(periph);
1044 /* Announce command queueing. */
1045 if (path->device->inq_flags & SID_CmdQue
1046 || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) {
1047 printf("%s%d: Command Queueing enabled\n",
1048 periph->periph_name, periph->unit_number);
1050 /* Announce caller's details if they've passed in. */
1051 if (announce_string != NULL)
1052 printf("%s%d: %s\n", periph->periph_name,
1053 periph->unit_number, announce_string);
1057 xpt_announce_quirks(struct cam_periph *periph, int quirks, char *bit_string)
1060 printf("%s%d: quirks=0x%b\n", periph->periph_name,
1061 periph->unit_number, quirks, bit_string);
1066 xpt_denounce_periph(struct cam_periph *periph)
1068 struct cam_path *path = periph->path;
1070 cam_periph_assert(periph, MA_OWNED);
1071 printf("%s%d at %s%d bus %d scbus%d target %d lun %jx\n",
1072 periph->periph_name, periph->unit_number,
1073 path->bus->sim->sim_name,
1074 path->bus->sim->unit_number,
1075 path->bus->sim->bus_id,
1077 path->target->target_id,
1078 (uintmax_t)path->device->lun_id);
1079 printf("%s%d: ", periph->periph_name, periph->unit_number);
1080 if (path->device->protocol == PROTO_SCSI)
1081 scsi_print_inquiry_short(&path->device->inq_data);
1082 else if (path->device->protocol == PROTO_ATA ||
1083 path->device->protocol == PROTO_SATAPM)
1084 ata_print_ident_short(&path->device->ident_data);
1085 else if (path->device->protocol == PROTO_SEMB)
1086 semb_print_ident_short(
1087 (struct sep_identify_data *)&path->device->ident_data);
1089 printf("Unknown protocol device");
1090 if (path->device->serial_num_len > 0)
1091 printf(" s/n %.60s", path->device->serial_num);
1092 printf(" detached\n");
1097 xpt_getattr(char *buf, size_t len, const char *attr, struct cam_path *path)
1100 struct ccb_dev_advinfo cdai;
1101 struct scsi_vpd_id_descriptor *idd;
1103 xpt_path_assert(path, MA_OWNED);
1105 memset(&cdai, 0, sizeof(cdai));
1106 xpt_setup_ccb(&cdai.ccb_h, path, CAM_PRIORITY_NORMAL);
1107 cdai.ccb_h.func_code = XPT_DEV_ADVINFO;
1108 cdai.flags = CDAI_FLAG_NONE;
1111 if (!strcmp(attr, "GEOM::ident"))
1112 cdai.buftype = CDAI_TYPE_SERIAL_NUM;
1113 else if (!strcmp(attr, "GEOM::physpath"))
1114 cdai.buftype = CDAI_TYPE_PHYS_PATH;
1115 else if (strcmp(attr, "GEOM::lunid") == 0 ||
1116 strcmp(attr, "GEOM::lunname") == 0) {
1117 cdai.buftype = CDAI_TYPE_SCSI_DEVID;
1118 cdai.bufsiz = CAM_SCSI_DEVID_MAXLEN;
1122 cdai.buf = malloc(cdai.bufsiz, M_CAMXPT, M_NOWAIT|M_ZERO);
1123 if (cdai.buf == NULL) {
1127 xpt_action((union ccb *)&cdai); /* can only be synchronous */
1128 if ((cdai.ccb_h.status & CAM_DEV_QFRZN) != 0)
1129 cam_release_devq(cdai.ccb_h.path, 0, 0, 0, FALSE);
1130 if (cdai.provsiz == 0)
1132 if (cdai.buftype == CDAI_TYPE_SCSI_DEVID) {
1133 if (strcmp(attr, "GEOM::lunid") == 0) {
1134 idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf,
1135 cdai.provsiz, scsi_devid_is_lun_naa);
1137 idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf,
1138 cdai.provsiz, scsi_devid_is_lun_eui64);
1140 idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf,
1141 cdai.provsiz, scsi_devid_is_lun_uuid);
1143 idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf,
1144 cdai.provsiz, scsi_devid_is_lun_md5);
1148 idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf,
1149 cdai.provsiz, scsi_devid_is_lun_t10);
1151 idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf,
1152 cdai.provsiz, scsi_devid_is_lun_name);
1156 if ((idd->proto_codeset & SVPD_ID_CODESET_MASK) == SVPD_ID_CODESET_ASCII) {
1157 if (idd->length < len) {
1158 for (l = 0; l < idd->length; l++)
1159 buf[l] = idd->identifier[l] ?
1160 idd->identifier[l] : ' ';
1164 } else if ((idd->proto_codeset & SVPD_ID_CODESET_MASK) == SVPD_ID_CODESET_UTF8) {
1165 l = strnlen(idd->identifier, idd->length);
1167 bcopy(idd->identifier, buf, l);
1171 } else if ((idd->id_type & SVPD_ID_TYPE_MASK) == SVPD_ID_TYPE_UUID
1172 && idd->identifier[0] == 0x10) {
1173 if ((idd->length - 2) * 2 + 4 < len) {
1174 for (l = 2, o = 0; l < idd->length; l++) {
1175 if (l == 6 || l == 8 || l == 10 || l == 12)
1176 o += sprintf(buf + o, "-");
1177 o += sprintf(buf + o, "%02x",
1178 idd->identifier[l]);
1183 if (idd->length * 2 < len) {
1184 for (l = 0; l < idd->length; l++)
1185 sprintf(buf + l * 2, "%02x",
1186 idd->identifier[l]);
1192 if (strlcpy(buf, cdai.buf, len) >= len)
1197 if (cdai.buf != NULL)
1198 free(cdai.buf, M_CAMXPT);
1202 static dev_match_ret
1203 xptbusmatch(struct dev_match_pattern *patterns, u_int num_patterns,
1206 dev_match_ret retval;
1209 retval = DM_RET_NONE;
1212 * If we aren't given something to match against, that's an error.
1215 return(DM_RET_ERROR);
1218 * If there are no match entries, then this bus matches no
1221 if ((patterns == NULL) || (num_patterns == 0))
1222 return(DM_RET_DESCEND | DM_RET_COPY);
1224 for (i = 0; i < num_patterns; i++) {
1225 struct bus_match_pattern *cur_pattern;
1228 * If the pattern in question isn't for a bus node, we
1229 * aren't interested. However, we do indicate to the
1230 * calling routine that we should continue descending the
1231 * tree, since the user wants to match against lower-level
1234 if (patterns[i].type != DEV_MATCH_BUS) {
1235 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1236 retval |= DM_RET_DESCEND;
1240 cur_pattern = &patterns[i].pattern.bus_pattern;
1243 * If they want to match any bus node, we give them any
1246 if (cur_pattern->flags == BUS_MATCH_ANY) {
1247 /* set the copy flag */
1248 retval |= DM_RET_COPY;
1251 * If we've already decided on an action, go ahead
1254 if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE)
1259 * Not sure why someone would do this...
1261 if (cur_pattern->flags == BUS_MATCH_NONE)
1264 if (((cur_pattern->flags & BUS_MATCH_PATH) != 0)
1265 && (cur_pattern->path_id != bus->path_id))
1268 if (((cur_pattern->flags & BUS_MATCH_BUS_ID) != 0)
1269 && (cur_pattern->bus_id != bus->sim->bus_id))
1272 if (((cur_pattern->flags & BUS_MATCH_UNIT) != 0)
1273 && (cur_pattern->unit_number != bus->sim->unit_number))
1276 if (((cur_pattern->flags & BUS_MATCH_NAME) != 0)
1277 && (strncmp(cur_pattern->dev_name, bus->sim->sim_name,
1282 * If we get to this point, the user definitely wants
1283 * information on this bus. So tell the caller to copy the
1286 retval |= DM_RET_COPY;
1289 * If the return action has been set to descend, then we
1290 * know that we've already seen a non-bus matching
1291 * expression, therefore we need to further descend the tree.
1292 * This won't change by continuing around the loop, so we
1293 * go ahead and return. If we haven't seen a non-bus
1294 * matching expression, we keep going around the loop until
1295 * we exhaust the matching expressions. We'll set the stop
1296 * flag once we fall out of the loop.
1298 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND)
1303 * If the return action hasn't been set to descend yet, that means
1304 * we haven't seen anything other than bus matching patterns. So
1305 * tell the caller to stop descending the tree -- the user doesn't
1306 * want to match against lower level tree elements.
1308 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1309 retval |= DM_RET_STOP;
1314 static dev_match_ret
1315 xptdevicematch(struct dev_match_pattern *patterns, u_int num_patterns,
1316 struct cam_ed *device)
1318 dev_match_ret retval;
1321 retval = DM_RET_NONE;
1324 * If we aren't given something to match against, that's an error.
1327 return(DM_RET_ERROR);
1330 * If there are no match entries, then this device matches no
1333 if ((patterns == NULL) || (num_patterns == 0))
1334 return(DM_RET_DESCEND | DM_RET_COPY);
1336 for (i = 0; i < num_patterns; i++) {
1337 struct device_match_pattern *cur_pattern;
1338 struct scsi_vpd_device_id *device_id_page;
1341 * If the pattern in question isn't for a device node, we
1342 * aren't interested.
1344 if (patterns[i].type != DEV_MATCH_DEVICE) {
1345 if ((patterns[i].type == DEV_MATCH_PERIPH)
1346 && ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE))
1347 retval |= DM_RET_DESCEND;
1351 cur_pattern = &patterns[i].pattern.device_pattern;
1353 /* Error out if mutually exclusive options are specified. */
1354 if ((cur_pattern->flags & (DEV_MATCH_INQUIRY|DEV_MATCH_DEVID))
1355 == (DEV_MATCH_INQUIRY|DEV_MATCH_DEVID))
1356 return(DM_RET_ERROR);
1359 * If they want to match any device node, we give them any
1362 if (cur_pattern->flags == DEV_MATCH_ANY)
1366 * Not sure why someone would do this...
1368 if (cur_pattern->flags == DEV_MATCH_NONE)
1371 if (((cur_pattern->flags & DEV_MATCH_PATH) != 0)
1372 && (cur_pattern->path_id != device->target->bus->path_id))
1375 if (((cur_pattern->flags & DEV_MATCH_TARGET) != 0)
1376 && (cur_pattern->target_id != device->target->target_id))
1379 if (((cur_pattern->flags & DEV_MATCH_LUN) != 0)
1380 && (cur_pattern->target_lun != device->lun_id))
1383 if (((cur_pattern->flags & DEV_MATCH_INQUIRY) != 0)
1384 && (cam_quirkmatch((caddr_t)&device->inq_data,
1385 (caddr_t)&cur_pattern->data.inq_pat,
1386 1, sizeof(cur_pattern->data.inq_pat),
1387 scsi_static_inquiry_match) == NULL))
1390 device_id_page = (struct scsi_vpd_device_id *)device->device_id;
1391 if (((cur_pattern->flags & DEV_MATCH_DEVID) != 0)
1392 && (device->device_id_len < SVPD_DEVICE_ID_HDR_LEN
1393 || scsi_devid_match((uint8_t *)device_id_page->desc_list,
1394 device->device_id_len
1395 - SVPD_DEVICE_ID_HDR_LEN,
1396 cur_pattern->data.devid_pat.id,
1397 cur_pattern->data.devid_pat.id_len) != 0))
1402 * If we get to this point, the user definitely wants
1403 * information on this device. So tell the caller to copy
1406 retval |= DM_RET_COPY;
1409 * If the return action has been set to descend, then we
1410 * know that we've already seen a peripheral matching
1411 * expression, therefore we need to further descend the tree.
1412 * This won't change by continuing around the loop, so we
1413 * go ahead and return. If we haven't seen a peripheral
1414 * matching expression, we keep going around the loop until
1415 * we exhaust the matching expressions. We'll set the stop
1416 * flag once we fall out of the loop.
1418 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND)
1423 * If the return action hasn't been set to descend yet, that means
1424 * we haven't seen any peripheral matching patterns. So tell the
1425 * caller to stop descending the tree -- the user doesn't want to
1426 * match against lower level tree elements.
1428 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1429 retval |= DM_RET_STOP;
1435 * Match a single peripheral against any number of match patterns.
1437 static dev_match_ret
1438 xptperiphmatch(struct dev_match_pattern *patterns, u_int num_patterns,
1439 struct cam_periph *periph)
1441 dev_match_ret retval;
1445 * If we aren't given something to match against, that's an error.
1448 return(DM_RET_ERROR);
1451 * If there are no match entries, then this peripheral matches no
1454 if ((patterns == NULL) || (num_patterns == 0))
1455 return(DM_RET_STOP | DM_RET_COPY);
1458 * There aren't any nodes below a peripheral node, so there's no
1459 * reason to descend the tree any further.
1461 retval = DM_RET_STOP;
1463 for (i = 0; i < num_patterns; i++) {
1464 struct periph_match_pattern *cur_pattern;
1467 * If the pattern in question isn't for a peripheral, we
1468 * aren't interested.
1470 if (patterns[i].type != DEV_MATCH_PERIPH)
1473 cur_pattern = &patterns[i].pattern.periph_pattern;
1476 * If they want to match on anything, then we will do so.
1478 if (cur_pattern->flags == PERIPH_MATCH_ANY) {
1479 /* set the copy flag */
1480 retval |= DM_RET_COPY;
1483 * We've already set the return action to stop,
1484 * since there are no nodes below peripherals in
1491 * Not sure why someone would do this...
1493 if (cur_pattern->flags == PERIPH_MATCH_NONE)
1496 if (((cur_pattern->flags & PERIPH_MATCH_PATH) != 0)
1497 && (cur_pattern->path_id != periph->path->bus->path_id))
1501 * For the target and lun id's, we have to make sure the
1502 * target and lun pointers aren't NULL. The xpt peripheral
1503 * has a wildcard target and device.
1505 if (((cur_pattern->flags & PERIPH_MATCH_TARGET) != 0)
1506 && ((periph->path->target == NULL)
1507 ||(cur_pattern->target_id != periph->path->target->target_id)))
1510 if (((cur_pattern->flags & PERIPH_MATCH_LUN) != 0)
1511 && ((periph->path->device == NULL)
1512 || (cur_pattern->target_lun != periph->path->device->lun_id)))
1515 if (((cur_pattern->flags & PERIPH_MATCH_UNIT) != 0)
1516 && (cur_pattern->unit_number != periph->unit_number))
1519 if (((cur_pattern->flags & PERIPH_MATCH_NAME) != 0)
1520 && (strncmp(cur_pattern->periph_name, periph->periph_name,
1525 * If we get to this point, the user definitely wants
1526 * information on this peripheral. So tell the caller to
1527 * copy the data out.
1529 retval |= DM_RET_COPY;
1532 * The return action has already been set to stop, since
1533 * peripherals don't have any nodes below them in the EDT.
1539 * If we get to this point, the peripheral that was passed in
1540 * doesn't match any of the patterns.
1546 xptedtbusfunc(struct cam_eb *bus, void *arg)
1548 struct ccb_dev_match *cdm;
1549 struct cam_et *target;
1550 dev_match_ret retval;
1552 cdm = (struct ccb_dev_match *)arg;
1555 * If our position is for something deeper in the tree, that means
1556 * that we've already seen this node. So, we keep going down.
1558 if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1559 && (cdm->pos.cookie.bus == bus)
1560 && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1561 && (cdm->pos.cookie.target != NULL))
1562 retval = DM_RET_DESCEND;
1564 retval = xptbusmatch(cdm->patterns, cdm->num_patterns, bus);
1567 * If we got an error, bail out of the search.
1569 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1570 cdm->status = CAM_DEV_MATCH_ERROR;
1575 * If the copy flag is set, copy this bus out.
1577 if (retval & DM_RET_COPY) {
1580 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1581 sizeof(struct dev_match_result));
1584 * If we don't have enough space to put in another
1585 * match result, save our position and tell the
1586 * user there are more devices to check.
1588 if (spaceleft < sizeof(struct dev_match_result)) {
1589 bzero(&cdm->pos, sizeof(cdm->pos));
1590 cdm->pos.position_type =
1591 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS;
1593 cdm->pos.cookie.bus = bus;
1594 cdm->pos.generations[CAM_BUS_GENERATION]=
1595 xsoftc.bus_generation;
1596 cdm->status = CAM_DEV_MATCH_MORE;
1599 j = cdm->num_matches;
1601 cdm->matches[j].type = DEV_MATCH_BUS;
1602 cdm->matches[j].result.bus_result.path_id = bus->path_id;
1603 cdm->matches[j].result.bus_result.bus_id = bus->sim->bus_id;
1604 cdm->matches[j].result.bus_result.unit_number =
1605 bus->sim->unit_number;
1606 strncpy(cdm->matches[j].result.bus_result.dev_name,
1607 bus->sim->sim_name, DEV_IDLEN);
1611 * If the user is only interested in busses, there's no
1612 * reason to descend to the next level in the tree.
1614 if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP)
1618 * If there is a target generation recorded, check it to
1619 * make sure the target list hasn't changed.
1621 mtx_lock(&bus->eb_mtx);
1622 if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1623 && (cdm->pos.cookie.bus == bus)
1624 && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1625 && (cdm->pos.cookie.target != NULL)) {
1626 if ((cdm->pos.generations[CAM_TARGET_GENERATION] !=
1628 mtx_unlock(&bus->eb_mtx);
1629 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1632 target = (struct cam_et *)cdm->pos.cookie.target;
1636 mtx_unlock(&bus->eb_mtx);
1638 return (xpttargettraverse(bus, target, xptedttargetfunc, arg));
1642 xptedttargetfunc(struct cam_et *target, void *arg)
1644 struct ccb_dev_match *cdm;
1646 struct cam_ed *device;
1648 cdm = (struct ccb_dev_match *)arg;
1652 * If there is a device list generation recorded, check it to
1653 * make sure the device list hasn't changed.
1655 mtx_lock(&bus->eb_mtx);
1656 if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1657 && (cdm->pos.cookie.bus == bus)
1658 && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1659 && (cdm->pos.cookie.target == target)
1660 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1661 && (cdm->pos.cookie.device != NULL)) {
1662 if (cdm->pos.generations[CAM_DEV_GENERATION] !=
1663 target->generation) {
1664 mtx_unlock(&bus->eb_mtx);
1665 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1668 device = (struct cam_ed *)cdm->pos.cookie.device;
1672 mtx_unlock(&bus->eb_mtx);
1674 return (xptdevicetraverse(target, device, xptedtdevicefunc, arg));
1678 xptedtdevicefunc(struct cam_ed *device, void *arg)
1681 struct cam_periph *periph;
1682 struct ccb_dev_match *cdm;
1683 dev_match_ret retval;
1685 cdm = (struct ccb_dev_match *)arg;
1686 bus = device->target->bus;
1689 * If our position is for something deeper in the tree, that means
1690 * that we've already seen this node. So, we keep going down.
1692 if ((cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1693 && (cdm->pos.cookie.device == device)
1694 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
1695 && (cdm->pos.cookie.periph != NULL))
1696 retval = DM_RET_DESCEND;
1698 retval = xptdevicematch(cdm->patterns, cdm->num_patterns,
1701 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1702 cdm->status = CAM_DEV_MATCH_ERROR;
1707 * If the copy flag is set, copy this device out.
1709 if (retval & DM_RET_COPY) {
1712 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1713 sizeof(struct dev_match_result));
1716 * If we don't have enough space to put in another
1717 * match result, save our position and tell the
1718 * user there are more devices to check.
1720 if (spaceleft < sizeof(struct dev_match_result)) {
1721 bzero(&cdm->pos, sizeof(cdm->pos));
1722 cdm->pos.position_type =
1723 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS |
1724 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE;
1726 cdm->pos.cookie.bus = device->target->bus;
1727 cdm->pos.generations[CAM_BUS_GENERATION]=
1728 xsoftc.bus_generation;
1729 cdm->pos.cookie.target = device->target;
1730 cdm->pos.generations[CAM_TARGET_GENERATION] =
1731 device->target->bus->generation;
1732 cdm->pos.cookie.device = device;
1733 cdm->pos.generations[CAM_DEV_GENERATION] =
1734 device->target->generation;
1735 cdm->status = CAM_DEV_MATCH_MORE;
1738 j = cdm->num_matches;
1740 cdm->matches[j].type = DEV_MATCH_DEVICE;
1741 cdm->matches[j].result.device_result.path_id =
1742 device->target->bus->path_id;
1743 cdm->matches[j].result.device_result.target_id =
1744 device->target->target_id;
1745 cdm->matches[j].result.device_result.target_lun =
1747 cdm->matches[j].result.device_result.protocol =
1749 bcopy(&device->inq_data,
1750 &cdm->matches[j].result.device_result.inq_data,
1751 sizeof(struct scsi_inquiry_data));
1752 bcopy(&device->ident_data,
1753 &cdm->matches[j].result.device_result.ident_data,
1754 sizeof(struct ata_params));
1756 /* Let the user know whether this device is unconfigured */
1757 if (device->flags & CAM_DEV_UNCONFIGURED)
1758 cdm->matches[j].result.device_result.flags =
1759 DEV_RESULT_UNCONFIGURED;
1761 cdm->matches[j].result.device_result.flags =
1766 * If the user isn't interested in peripherals, don't descend
1767 * the tree any further.
1769 if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP)
1773 * If there is a peripheral list generation recorded, make sure
1774 * it hasn't changed.
1777 mtx_lock(&bus->eb_mtx);
1778 if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1779 && (cdm->pos.cookie.bus == bus)
1780 && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1781 && (cdm->pos.cookie.target == device->target)
1782 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1783 && (cdm->pos.cookie.device == device)
1784 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
1785 && (cdm->pos.cookie.periph != NULL)) {
1786 if (cdm->pos.generations[CAM_PERIPH_GENERATION] !=
1787 device->generation) {
1788 mtx_unlock(&bus->eb_mtx);
1790 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1793 periph = (struct cam_periph *)cdm->pos.cookie.periph;
1797 mtx_unlock(&bus->eb_mtx);
1800 return (xptperiphtraverse(device, periph, xptedtperiphfunc, arg));
1804 xptedtperiphfunc(struct cam_periph *periph, void *arg)
1806 struct ccb_dev_match *cdm;
1807 dev_match_ret retval;
1809 cdm = (struct ccb_dev_match *)arg;
1811 retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph);
1813 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1814 cdm->status = CAM_DEV_MATCH_ERROR;
1819 * If the copy flag is set, copy this peripheral out.
1821 if (retval & DM_RET_COPY) {
1824 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1825 sizeof(struct dev_match_result));
1828 * If we don't have enough space to put in another
1829 * match result, save our position and tell the
1830 * user there are more devices to check.
1832 if (spaceleft < sizeof(struct dev_match_result)) {
1833 bzero(&cdm->pos, sizeof(cdm->pos));
1834 cdm->pos.position_type =
1835 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS |
1836 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE |
1839 cdm->pos.cookie.bus = periph->path->bus;
1840 cdm->pos.generations[CAM_BUS_GENERATION]=
1841 xsoftc.bus_generation;
1842 cdm->pos.cookie.target = periph->path->target;
1843 cdm->pos.generations[CAM_TARGET_GENERATION] =
1844 periph->path->bus->generation;
1845 cdm->pos.cookie.device = periph->path->device;
1846 cdm->pos.generations[CAM_DEV_GENERATION] =
1847 periph->path->target->generation;
1848 cdm->pos.cookie.periph = periph;
1849 cdm->pos.generations[CAM_PERIPH_GENERATION] =
1850 periph->path->device->generation;
1851 cdm->status = CAM_DEV_MATCH_MORE;
1855 j = cdm->num_matches;
1857 cdm->matches[j].type = DEV_MATCH_PERIPH;
1858 cdm->matches[j].result.periph_result.path_id =
1859 periph->path->bus->path_id;
1860 cdm->matches[j].result.periph_result.target_id =
1861 periph->path->target->target_id;
1862 cdm->matches[j].result.periph_result.target_lun =
1863 periph->path->device->lun_id;
1864 cdm->matches[j].result.periph_result.unit_number =
1865 periph->unit_number;
1866 strncpy(cdm->matches[j].result.periph_result.periph_name,
1867 periph->periph_name, DEV_IDLEN);
1874 xptedtmatch(struct ccb_dev_match *cdm)
1879 cdm->num_matches = 0;
1882 * Check the bus list generation. If it has changed, the user
1883 * needs to reset everything and start over.
1886 if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1887 && (cdm->pos.cookie.bus != NULL)) {
1888 if (cdm->pos.generations[CAM_BUS_GENERATION] !=
1889 xsoftc.bus_generation) {
1891 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1894 bus = (struct cam_eb *)cdm->pos.cookie.bus;
1900 ret = xptbustraverse(bus, xptedtbusfunc, cdm);
1903 * If we get back 0, that means that we had to stop before fully
1904 * traversing the EDT. It also means that one of the subroutines
1905 * has set the status field to the proper value. If we get back 1,
1906 * we've fully traversed the EDT and copied out any matching entries.
1909 cdm->status = CAM_DEV_MATCH_LAST;
1915 xptplistpdrvfunc(struct periph_driver **pdrv, void *arg)
1917 struct cam_periph *periph;
1918 struct ccb_dev_match *cdm;
1920 cdm = (struct ccb_dev_match *)arg;
1923 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
1924 && (cdm->pos.cookie.pdrv == pdrv)
1925 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
1926 && (cdm->pos.cookie.periph != NULL)) {
1927 if (cdm->pos.generations[CAM_PERIPH_GENERATION] !=
1928 (*pdrv)->generation) {
1930 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1933 periph = (struct cam_periph *)cdm->pos.cookie.periph;
1939 return (xptpdperiphtraverse(pdrv, periph, xptplistperiphfunc, arg));
1943 xptplistperiphfunc(struct cam_periph *periph, void *arg)
1945 struct ccb_dev_match *cdm;
1946 dev_match_ret retval;
1948 cdm = (struct ccb_dev_match *)arg;
1950 retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph);
1952 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1953 cdm->status = CAM_DEV_MATCH_ERROR;
1958 * If the copy flag is set, copy this peripheral out.
1960 if (retval & DM_RET_COPY) {
1963 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1964 sizeof(struct dev_match_result));
1967 * If we don't have enough space to put in another
1968 * match result, save our position and tell the
1969 * user there are more devices to check.
1971 if (spaceleft < sizeof(struct dev_match_result)) {
1972 struct periph_driver **pdrv;
1975 bzero(&cdm->pos, sizeof(cdm->pos));
1976 cdm->pos.position_type =
1977 CAM_DEV_POS_PDRV | CAM_DEV_POS_PDPTR |
1981 * This may look a bit non-sensical, but it is
1982 * actually quite logical. There are very few
1983 * peripheral drivers, and bloating every peripheral
1984 * structure with a pointer back to its parent
1985 * peripheral driver linker set entry would cost
1986 * more in the long run than doing this quick lookup.
1988 for (pdrv = periph_drivers; *pdrv != NULL; pdrv++) {
1989 if (strcmp((*pdrv)->driver_name,
1990 periph->periph_name) == 0)
1994 if (*pdrv == NULL) {
1995 cdm->status = CAM_DEV_MATCH_ERROR;
1999 cdm->pos.cookie.pdrv = pdrv;
2001 * The periph generation slot does double duty, as
2002 * does the periph pointer slot. They are used for
2003 * both edt and pdrv lookups and positioning.
2005 cdm->pos.cookie.periph = periph;
2006 cdm->pos.generations[CAM_PERIPH_GENERATION] =
2007 (*pdrv)->generation;
2008 cdm->status = CAM_DEV_MATCH_MORE;
2012 j = cdm->num_matches;
2014 cdm->matches[j].type = DEV_MATCH_PERIPH;
2015 cdm->matches[j].result.periph_result.path_id =
2016 periph->path->bus->path_id;
2019 * The transport layer peripheral doesn't have a target or
2022 if (periph->path->target)
2023 cdm->matches[j].result.periph_result.target_id =
2024 periph->path->target->target_id;
2026 cdm->matches[j].result.periph_result.target_id =
2027 CAM_TARGET_WILDCARD;
2029 if (periph->path->device)
2030 cdm->matches[j].result.periph_result.target_lun =
2031 periph->path->device->lun_id;
2033 cdm->matches[j].result.periph_result.target_lun =
2036 cdm->matches[j].result.periph_result.unit_number =
2037 periph->unit_number;
2038 strncpy(cdm->matches[j].result.periph_result.periph_name,
2039 periph->periph_name, DEV_IDLEN);
2046 xptperiphlistmatch(struct ccb_dev_match *cdm)
2050 cdm->num_matches = 0;
2053 * At this point in the edt traversal function, we check the bus
2054 * list generation to make sure that no busses have been added or
2055 * removed since the user last sent a XPT_DEV_MATCH ccb through.
2056 * For the peripheral driver list traversal function, however, we
2057 * don't have to worry about new peripheral driver types coming or
2058 * going; they're in a linker set, and therefore can't change
2059 * without a recompile.
2062 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
2063 && (cdm->pos.cookie.pdrv != NULL))
2064 ret = xptpdrvtraverse(
2065 (struct periph_driver **)cdm->pos.cookie.pdrv,
2066 xptplistpdrvfunc, cdm);
2068 ret = xptpdrvtraverse(NULL, xptplistpdrvfunc, cdm);
2071 * If we get back 0, that means that we had to stop before fully
2072 * traversing the peripheral driver tree. It also means that one of
2073 * the subroutines has set the status field to the proper value. If
2074 * we get back 1, we've fully traversed the EDT and copied out any
2078 cdm->status = CAM_DEV_MATCH_LAST;
2084 xptbustraverse(struct cam_eb *start_bus, xpt_busfunc_t *tr_func, void *arg)
2086 struct cam_eb *bus, *next_bus;
2094 bus = TAILQ_FIRST(&xsoftc.xpt_busses);
2102 for (; bus != NULL; bus = next_bus) {
2103 retval = tr_func(bus, arg);
2105 xpt_release_bus(bus);
2109 next_bus = TAILQ_NEXT(bus, links);
2111 next_bus->refcount++;
2113 xpt_release_bus(bus);
2119 xpttargettraverse(struct cam_eb *bus, struct cam_et *start_target,
2120 xpt_targetfunc_t *tr_func, void *arg)
2122 struct cam_et *target, *next_target;
2127 target = start_target;
2129 mtx_lock(&bus->eb_mtx);
2130 target = TAILQ_FIRST(&bus->et_entries);
2131 if (target == NULL) {
2132 mtx_unlock(&bus->eb_mtx);
2136 mtx_unlock(&bus->eb_mtx);
2138 for (; target != NULL; target = next_target) {
2139 retval = tr_func(target, arg);
2141 xpt_release_target(target);
2144 mtx_lock(&bus->eb_mtx);
2145 next_target = TAILQ_NEXT(target, links);
2147 next_target->refcount++;
2148 mtx_unlock(&bus->eb_mtx);
2149 xpt_release_target(target);
2155 xptdevicetraverse(struct cam_et *target, struct cam_ed *start_device,
2156 xpt_devicefunc_t *tr_func, void *arg)
2159 struct cam_ed *device, *next_device;
2165 device = start_device;
2167 mtx_lock(&bus->eb_mtx);
2168 device = TAILQ_FIRST(&target->ed_entries);
2169 if (device == NULL) {
2170 mtx_unlock(&bus->eb_mtx);
2174 mtx_unlock(&bus->eb_mtx);
2176 for (; device != NULL; device = next_device) {
2177 mtx_lock(&device->device_mtx);
2178 retval = tr_func(device, arg);
2179 mtx_unlock(&device->device_mtx);
2181 xpt_release_device(device);
2184 mtx_lock(&bus->eb_mtx);
2185 next_device = TAILQ_NEXT(device, links);
2187 next_device->refcount++;
2188 mtx_unlock(&bus->eb_mtx);
2189 xpt_release_device(device);
2195 xptperiphtraverse(struct cam_ed *device, struct cam_periph *start_periph,
2196 xpt_periphfunc_t *tr_func, void *arg)
2199 struct cam_periph *periph, *next_periph;
2204 bus = device->target->bus;
2206 periph = start_periph;
2209 mtx_lock(&bus->eb_mtx);
2210 periph = SLIST_FIRST(&device->periphs);
2211 while (periph != NULL && (periph->flags & CAM_PERIPH_FREE) != 0)
2212 periph = SLIST_NEXT(periph, periph_links);
2213 if (periph == NULL) {
2214 mtx_unlock(&bus->eb_mtx);
2219 mtx_unlock(&bus->eb_mtx);
2222 for (; periph != NULL; periph = next_periph) {
2223 retval = tr_func(periph, arg);
2225 cam_periph_release_locked(periph);
2229 mtx_lock(&bus->eb_mtx);
2230 next_periph = SLIST_NEXT(periph, periph_links);
2231 while (next_periph != NULL &&
2232 (next_periph->flags & CAM_PERIPH_FREE) != 0)
2233 next_periph = SLIST_NEXT(next_periph, periph_links);
2235 next_periph->refcount++;
2236 mtx_unlock(&bus->eb_mtx);
2238 cam_periph_release_locked(periph);
2244 xptpdrvtraverse(struct periph_driver **start_pdrv,
2245 xpt_pdrvfunc_t *tr_func, void *arg)
2247 struct periph_driver **pdrv;
2253 * We don't traverse the peripheral driver list like we do the
2254 * other lists, because it is a linker set, and therefore cannot be
2255 * changed during runtime. If the peripheral driver list is ever
2256 * re-done to be something other than a linker set (i.e. it can
2257 * change while the system is running), the list traversal should
2258 * be modified to work like the other traversal functions.
2260 for (pdrv = (start_pdrv ? start_pdrv : periph_drivers);
2261 *pdrv != NULL; pdrv++) {
2262 retval = tr_func(pdrv, arg);
2272 xptpdperiphtraverse(struct periph_driver **pdrv,
2273 struct cam_periph *start_periph,
2274 xpt_periphfunc_t *tr_func, void *arg)
2276 struct cam_periph *periph, *next_periph;
2282 periph = start_periph;
2285 periph = TAILQ_FIRST(&(*pdrv)->units);
2286 while (periph != NULL && (periph->flags & CAM_PERIPH_FREE) != 0)
2287 periph = TAILQ_NEXT(periph, unit_links);
2288 if (periph == NULL) {
2295 for (; periph != NULL; periph = next_periph) {
2296 cam_periph_lock(periph);
2297 retval = tr_func(periph, arg);
2298 cam_periph_unlock(periph);
2300 cam_periph_release(periph);
2304 next_periph = TAILQ_NEXT(periph, unit_links);
2305 while (next_periph != NULL &&
2306 (next_periph->flags & CAM_PERIPH_FREE) != 0)
2307 next_periph = TAILQ_NEXT(next_periph, unit_links);
2309 next_periph->refcount++;
2311 cam_periph_release(periph);
2317 xptdefbusfunc(struct cam_eb *bus, void *arg)
2319 struct xpt_traverse_config *tr_config;
2321 tr_config = (struct xpt_traverse_config *)arg;
2323 if (tr_config->depth == XPT_DEPTH_BUS) {
2324 xpt_busfunc_t *tr_func;
2326 tr_func = (xpt_busfunc_t *)tr_config->tr_func;
2328 return(tr_func(bus, tr_config->tr_arg));
2330 return(xpttargettraverse(bus, NULL, xptdeftargetfunc, arg));
2334 xptdeftargetfunc(struct cam_et *target, void *arg)
2336 struct xpt_traverse_config *tr_config;
2338 tr_config = (struct xpt_traverse_config *)arg;
2340 if (tr_config->depth == XPT_DEPTH_TARGET) {
2341 xpt_targetfunc_t *tr_func;
2343 tr_func = (xpt_targetfunc_t *)tr_config->tr_func;
2345 return(tr_func(target, tr_config->tr_arg));
2347 return(xptdevicetraverse(target, NULL, xptdefdevicefunc, arg));
2351 xptdefdevicefunc(struct cam_ed *device, void *arg)
2353 struct xpt_traverse_config *tr_config;
2355 tr_config = (struct xpt_traverse_config *)arg;
2357 if (tr_config->depth == XPT_DEPTH_DEVICE) {
2358 xpt_devicefunc_t *tr_func;
2360 tr_func = (xpt_devicefunc_t *)tr_config->tr_func;
2362 return(tr_func(device, tr_config->tr_arg));
2364 return(xptperiphtraverse(device, NULL, xptdefperiphfunc, arg));
2368 xptdefperiphfunc(struct cam_periph *periph, void *arg)
2370 struct xpt_traverse_config *tr_config;
2371 xpt_periphfunc_t *tr_func;
2373 tr_config = (struct xpt_traverse_config *)arg;
2375 tr_func = (xpt_periphfunc_t *)tr_config->tr_func;
2378 * Unlike the other default functions, we don't check for depth
2379 * here. The peripheral driver level is the last level in the EDT,
2380 * so if we're here, we should execute the function in question.
2382 return(tr_func(periph, tr_config->tr_arg));
2386 * Execute the given function for every bus in the EDT.
2389 xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg)
2391 struct xpt_traverse_config tr_config;
2393 tr_config.depth = XPT_DEPTH_BUS;
2394 tr_config.tr_func = tr_func;
2395 tr_config.tr_arg = arg;
2397 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2401 * Execute the given function for every device in the EDT.
2404 xpt_for_all_devices(xpt_devicefunc_t *tr_func, void *arg)
2406 struct xpt_traverse_config tr_config;
2408 tr_config.depth = XPT_DEPTH_DEVICE;
2409 tr_config.tr_func = tr_func;
2410 tr_config.tr_arg = arg;
2412 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2416 xptsetasyncfunc(struct cam_ed *device, void *arg)
2418 struct cam_path path;
2419 struct ccb_getdev cgd;
2420 struct ccb_setasync *csa = (struct ccb_setasync *)arg;
2423 * Don't report unconfigured devices (Wildcard devs,
2424 * devices only for target mode, device instances
2425 * that have been invalidated but are waiting for
2426 * their last reference count to be released).
2428 if ((device->flags & CAM_DEV_UNCONFIGURED) != 0)
2431 xpt_compile_path(&path,
2433 device->target->bus->path_id,
2434 device->target->target_id,
2436 xpt_setup_ccb(&cgd.ccb_h, &path, CAM_PRIORITY_NORMAL);
2437 cgd.ccb_h.func_code = XPT_GDEV_TYPE;
2438 xpt_action((union ccb *)&cgd);
2439 csa->callback(csa->callback_arg,
2442 xpt_release_path(&path);
2448 xptsetasyncbusfunc(struct cam_eb *bus, void *arg)
2450 struct cam_path path;
2451 struct ccb_pathinq cpi;
2452 struct ccb_setasync *csa = (struct ccb_setasync *)arg;
2454 xpt_compile_path(&path, /*periph*/NULL,
2456 CAM_TARGET_WILDCARD,
2458 xpt_path_lock(&path);
2459 xpt_setup_ccb(&cpi.ccb_h, &path, CAM_PRIORITY_NORMAL);
2460 cpi.ccb_h.func_code = XPT_PATH_INQ;
2461 xpt_action((union ccb *)&cpi);
2462 csa->callback(csa->callback_arg,
2465 xpt_path_unlock(&path);
2466 xpt_release_path(&path);
2472 xpt_action(union ccb *start_ccb)
2475 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_action\n"));
2477 start_ccb->ccb_h.status = CAM_REQ_INPROG;
2478 (*(start_ccb->ccb_h.path->bus->xport->action))(start_ccb);
2482 xpt_action_default(union ccb *start_ccb)
2484 struct cam_path *path;
2485 struct cam_sim *sim;
2488 path = start_ccb->ccb_h.path;
2489 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_action_default\n"));
2491 switch (start_ccb->ccb_h.func_code) {
2494 struct cam_ed *device;
2497 * For the sake of compatibility with SCSI-1
2498 * devices that may not understand the identify
2499 * message, we include lun information in the
2500 * second byte of all commands. SCSI-1 specifies
2501 * that luns are a 3 bit value and reserves only 3
2502 * bits for lun information in the CDB. Later
2503 * revisions of the SCSI spec allow for more than 8
2504 * luns, but have deprecated lun information in the
2505 * CDB. So, if the lun won't fit, we must omit.
2507 * Also be aware that during initial probing for devices,
2508 * the inquiry information is unknown but initialized to 0.
2509 * This means that this code will be exercised while probing
2510 * devices with an ANSI revision greater than 2.
2512 device = path->device;
2513 if (device->protocol_version <= SCSI_REV_2
2514 && start_ccb->ccb_h.target_lun < 8
2515 && (start_ccb->ccb_h.flags & CAM_CDB_POINTER) == 0) {
2517 start_ccb->csio.cdb_io.cdb_bytes[1] |=
2518 start_ccb->ccb_h.target_lun << 5;
2520 start_ccb->csio.scsi_status = SCSI_STATUS_OK;
2524 case XPT_CONT_TARGET_IO:
2525 start_ccb->csio.sense_resid = 0;
2526 start_ccb->csio.resid = 0;
2529 if (start_ccb->ccb_h.func_code == XPT_ATA_IO)
2530 start_ccb->ataio.resid = 0;
2536 struct cam_devq *devq;
2538 devq = path->bus->sim->devq;
2539 mtx_lock(&devq->send_mtx);
2540 cam_ccbq_insert_ccb(&path->device->ccbq, start_ccb);
2541 if (xpt_schedule_devq(devq, path->device) != 0)
2543 mtx_unlock(&devq->send_mtx);
2546 case XPT_CALC_GEOMETRY:
2547 /* Filter out garbage */
2548 if (start_ccb->ccg.block_size == 0
2549 || start_ccb->ccg.volume_size == 0) {
2550 start_ccb->ccg.cylinders = 0;
2551 start_ccb->ccg.heads = 0;
2552 start_ccb->ccg.secs_per_track = 0;
2553 start_ccb->ccb_h.status = CAM_REQ_CMP;
2556 #if defined(PC98) || defined(__sparc64__)
2558 * In a PC-98 system, geometry translation depens on
2559 * the "real" device geometry obtained from mode page 4.
2560 * SCSI geometry translation is performed in the
2561 * initialization routine of the SCSI BIOS and the result
2562 * stored in host memory. If the translation is available
2563 * in host memory, use it. If not, rely on the default
2564 * translation the device driver performs.
2565 * For sparc64, we may need adjust the geometry of large
2566 * disks in order to fit the limitations of the 16-bit
2567 * fields of the VTOC8 disk label.
2569 if (scsi_da_bios_params(&start_ccb->ccg) != 0) {
2570 start_ccb->ccb_h.status = CAM_REQ_CMP;
2577 union ccb* abort_ccb;
2579 abort_ccb = start_ccb->cab.abort_ccb;
2580 if (XPT_FC_IS_DEV_QUEUED(abort_ccb)) {
2582 if (abort_ccb->ccb_h.pinfo.index >= 0) {
2583 struct cam_ccbq *ccbq;
2584 struct cam_ed *device;
2586 device = abort_ccb->ccb_h.path->device;
2587 ccbq = &device->ccbq;
2588 cam_ccbq_remove_ccb(ccbq, abort_ccb);
2589 abort_ccb->ccb_h.status =
2590 CAM_REQ_ABORTED|CAM_DEV_QFRZN;
2591 xpt_freeze_devq(abort_ccb->ccb_h.path, 1);
2592 xpt_done(abort_ccb);
2593 start_ccb->ccb_h.status = CAM_REQ_CMP;
2596 if (abort_ccb->ccb_h.pinfo.index == CAM_UNQUEUED_INDEX
2597 && (abort_ccb->ccb_h.status & CAM_SIM_QUEUED) == 0) {
2599 * We've caught this ccb en route to
2600 * the SIM. Flag it for abort and the
2601 * SIM will do so just before starting
2602 * real work on the CCB.
2604 abort_ccb->ccb_h.status =
2605 CAM_REQ_ABORTED|CAM_DEV_QFRZN;
2606 xpt_freeze_devq(abort_ccb->ccb_h.path, 1);
2607 start_ccb->ccb_h.status = CAM_REQ_CMP;
2611 if (XPT_FC_IS_QUEUED(abort_ccb)
2612 && (abort_ccb->ccb_h.pinfo.index == CAM_DONEQ_INDEX)) {
2614 * It's already completed but waiting
2615 * for our SWI to get to it.
2617 start_ccb->ccb_h.status = CAM_UA_ABORT;
2621 * If we weren't able to take care of the abort request
2622 * in the XPT, pass the request down to the SIM for processing.
2626 case XPT_ACCEPT_TARGET_IO:
2628 case XPT_IMMED_NOTIFY:
2629 case XPT_NOTIFY_ACK:
2631 case XPT_IMMEDIATE_NOTIFY:
2632 case XPT_NOTIFY_ACKNOWLEDGE:
2633 case XPT_GET_SIM_KNOB:
2634 case XPT_SET_SIM_KNOB:
2635 case XPT_GET_TRAN_SETTINGS:
2636 case XPT_SET_TRAN_SETTINGS:
2639 sim = path->bus->sim;
2640 lock = (mtx_owned(sim->mtx) == 0);
2643 (*(sim->sim_action))(sim, start_ccb);
2645 CAM_SIM_UNLOCK(sim);
2647 case XPT_PATH_STATS:
2648 start_ccb->cpis.last_reset = path->bus->last_reset;
2649 start_ccb->ccb_h.status = CAM_REQ_CMP;
2656 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) {
2657 start_ccb->ccb_h.status = CAM_DEV_NOT_THERE;
2659 struct ccb_getdev *cgd;
2661 cgd = &start_ccb->cgd;
2662 cgd->protocol = dev->protocol;
2663 cgd->inq_data = dev->inq_data;
2664 cgd->ident_data = dev->ident_data;
2665 cgd->inq_flags = dev->inq_flags;
2666 cgd->ccb_h.status = CAM_REQ_CMP;
2667 cgd->serial_num_len = dev->serial_num_len;
2668 if ((dev->serial_num_len > 0)
2669 && (dev->serial_num != NULL))
2670 bcopy(dev->serial_num, cgd->serial_num,
2671 dev->serial_num_len);
2675 case XPT_GDEV_STATS:
2680 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) {
2681 start_ccb->ccb_h.status = CAM_DEV_NOT_THERE;
2683 struct ccb_getdevstats *cgds;
2686 struct cam_devq *devq;
2688 cgds = &start_ccb->cgds;
2691 devq = bus->sim->devq;
2692 mtx_lock(&devq->send_mtx);
2693 cgds->dev_openings = dev->ccbq.dev_openings;
2694 cgds->dev_active = dev->ccbq.dev_active;
2695 cgds->allocated = dev->ccbq.allocated;
2696 cgds->queued = cam_ccbq_pending_ccb_count(&dev->ccbq);
2697 cgds->held = cgds->allocated - cgds->dev_active -
2699 cgds->last_reset = tar->last_reset;
2700 cgds->maxtags = dev->maxtags;
2701 cgds->mintags = dev->mintags;
2702 if (timevalcmp(&tar->last_reset, &bus->last_reset, <))
2703 cgds->last_reset = bus->last_reset;
2704 mtx_unlock(&devq->send_mtx);
2705 cgds->ccb_h.status = CAM_REQ_CMP;
2711 struct cam_periph *nperiph;
2712 struct periph_list *periph_head;
2713 struct ccb_getdevlist *cgdl;
2715 struct cam_ed *device;
2722 * Don't want anyone mucking with our data.
2724 device = path->device;
2725 periph_head = &device->periphs;
2726 cgdl = &start_ccb->cgdl;
2729 * Check and see if the list has changed since the user
2730 * last requested a list member. If so, tell them that the
2731 * list has changed, and therefore they need to start over
2732 * from the beginning.
2734 if ((cgdl->index != 0) &&
2735 (cgdl->generation != device->generation)) {
2736 cgdl->status = CAM_GDEVLIST_LIST_CHANGED;
2741 * Traverse the list of peripherals and attempt to find
2742 * the requested peripheral.
2744 for (nperiph = SLIST_FIRST(periph_head), i = 0;
2745 (nperiph != NULL) && (i <= cgdl->index);
2746 nperiph = SLIST_NEXT(nperiph, periph_links), i++) {
2747 if (i == cgdl->index) {
2748 strncpy(cgdl->periph_name,
2749 nperiph->periph_name,
2751 cgdl->unit_number = nperiph->unit_number;
2756 cgdl->status = CAM_GDEVLIST_ERROR;
2760 if (nperiph == NULL)
2761 cgdl->status = CAM_GDEVLIST_LAST_DEVICE;
2763 cgdl->status = CAM_GDEVLIST_MORE_DEVS;
2766 cgdl->generation = device->generation;
2768 cgdl->ccb_h.status = CAM_REQ_CMP;
2773 dev_pos_type position_type;
2774 struct ccb_dev_match *cdm;
2776 cdm = &start_ccb->cdm;
2779 * There are two ways of getting at information in the EDT.
2780 * The first way is via the primary EDT tree. It starts
2781 * with a list of busses, then a list of targets on a bus,
2782 * then devices/luns on a target, and then peripherals on a
2783 * device/lun. The "other" way is by the peripheral driver
2784 * lists. The peripheral driver lists are organized by
2785 * peripheral driver. (obviously) So it makes sense to
2786 * use the peripheral driver list if the user is looking
2787 * for something like "da1", or all "da" devices. If the
2788 * user is looking for something on a particular bus/target
2789 * or lun, it's generally better to go through the EDT tree.
2792 if (cdm->pos.position_type != CAM_DEV_POS_NONE)
2793 position_type = cdm->pos.position_type;
2797 position_type = CAM_DEV_POS_NONE;
2799 for (i = 0; i < cdm->num_patterns; i++) {
2800 if ((cdm->patterns[i].type == DEV_MATCH_BUS)
2801 ||(cdm->patterns[i].type == DEV_MATCH_DEVICE)){
2802 position_type = CAM_DEV_POS_EDT;
2807 if (cdm->num_patterns == 0)
2808 position_type = CAM_DEV_POS_EDT;
2809 else if (position_type == CAM_DEV_POS_NONE)
2810 position_type = CAM_DEV_POS_PDRV;
2813 switch(position_type & CAM_DEV_POS_TYPEMASK) {
2814 case CAM_DEV_POS_EDT:
2817 case CAM_DEV_POS_PDRV:
2818 xptperiphlistmatch(cdm);
2821 cdm->status = CAM_DEV_MATCH_ERROR;
2825 if (cdm->status == CAM_DEV_MATCH_ERROR)
2826 start_ccb->ccb_h.status = CAM_REQ_CMP_ERR;
2828 start_ccb->ccb_h.status = CAM_REQ_CMP;
2834 struct ccb_setasync *csa;
2835 struct async_node *cur_entry;
2836 struct async_list *async_head;
2839 csa = &start_ccb->csa;
2840 added = csa->event_enable;
2841 async_head = &path->device->asyncs;
2844 * If there is already an entry for us, simply
2847 cur_entry = SLIST_FIRST(async_head);
2848 while (cur_entry != NULL) {
2849 if ((cur_entry->callback_arg == csa->callback_arg)
2850 && (cur_entry->callback == csa->callback))
2852 cur_entry = SLIST_NEXT(cur_entry, links);
2855 if (cur_entry != NULL) {
2857 * If the request has no flags set,
2860 added &= ~cur_entry->event_enable;
2861 if (csa->event_enable == 0) {
2862 SLIST_REMOVE(async_head, cur_entry,
2864 xpt_release_device(path->device);
2865 free(cur_entry, M_CAMXPT);
2867 cur_entry->event_enable = csa->event_enable;
2869 csa->event_enable = added;
2871 cur_entry = malloc(sizeof(*cur_entry), M_CAMXPT,
2873 if (cur_entry == NULL) {
2874 csa->ccb_h.status = CAM_RESRC_UNAVAIL;
2877 cur_entry->event_enable = csa->event_enable;
2878 cur_entry->event_lock =
2879 mtx_owned(path->bus->sim->mtx) ? 1 : 0;
2880 cur_entry->callback_arg = csa->callback_arg;
2881 cur_entry->callback = csa->callback;
2882 SLIST_INSERT_HEAD(async_head, cur_entry, links);
2883 xpt_acquire_device(path->device);
2885 start_ccb->ccb_h.status = CAM_REQ_CMP;
2890 struct ccb_relsim *crs;
2893 crs = &start_ccb->crs;
2897 crs->ccb_h.status = CAM_DEV_NOT_THERE;
2901 if ((crs->release_flags & RELSIM_ADJUST_OPENINGS) != 0) {
2903 /* Don't ever go below one opening */
2904 if (crs->openings > 0) {
2905 xpt_dev_ccbq_resize(path, crs->openings);
2908 "number of openings is now %d\n",
2914 mtx_lock(&dev->sim->devq->send_mtx);
2915 if ((crs->release_flags & RELSIM_RELEASE_AFTER_TIMEOUT) != 0) {
2917 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) {
2920 * Just extend the old timeout and decrement
2921 * the freeze count so that a single timeout
2922 * is sufficient for releasing the queue.
2924 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
2925 callout_stop(&dev->callout);
2928 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
2931 callout_reset_sbt(&dev->callout,
2932 SBT_1MS * crs->release_timeout, 0,
2933 xpt_release_devq_timeout, dev, 0);
2935 dev->flags |= CAM_DEV_REL_TIMEOUT_PENDING;
2939 if ((crs->release_flags & RELSIM_RELEASE_AFTER_CMDCMPLT) != 0) {
2941 if ((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0) {
2943 * Decrement the freeze count so that a single
2944 * completion is still sufficient to unfreeze
2947 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
2950 dev->flags |= CAM_DEV_REL_ON_COMPLETE;
2951 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
2955 if ((crs->release_flags & RELSIM_RELEASE_AFTER_QEMPTY) != 0) {
2957 if ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0
2958 || (dev->ccbq.dev_active == 0)) {
2960 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
2963 dev->flags |= CAM_DEV_REL_ON_QUEUE_EMPTY;
2964 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
2967 mtx_unlock(&dev->sim->devq->send_mtx);
2969 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) == 0)
2970 xpt_release_devq(path, /*count*/1, /*run_queue*/TRUE);
2971 start_ccb->crs.qfrozen_cnt = dev->ccbq.queue.qfrozen_cnt;
2972 start_ccb->ccb_h.status = CAM_REQ_CMP;
2976 struct cam_path *oldpath;
2978 /* Check that all request bits are supported. */
2979 if (start_ccb->cdbg.flags & ~(CAM_DEBUG_COMPILE)) {
2980 start_ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
2984 cam_dflags = CAM_DEBUG_NONE;
2985 if (cam_dpath != NULL) {
2986 oldpath = cam_dpath;
2988 xpt_free_path(oldpath);
2990 if (start_ccb->cdbg.flags != CAM_DEBUG_NONE) {
2991 if (xpt_create_path(&cam_dpath, NULL,
2992 start_ccb->ccb_h.path_id,
2993 start_ccb->ccb_h.target_id,
2994 start_ccb->ccb_h.target_lun) !=
2996 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
2998 cam_dflags = start_ccb->cdbg.flags;
2999 start_ccb->ccb_h.status = CAM_REQ_CMP;
3000 xpt_print(cam_dpath, "debugging flags now %x\n",
3004 start_ccb->ccb_h.status = CAM_REQ_CMP;
3008 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0)
3009 xpt_freeze_devq(path, 1);
3010 start_ccb->ccb_h.status = CAM_REQ_CMP;
3012 case XPT_REPROBE_LUN:
3013 xpt_async(AC_INQ_CHANGED, path, NULL);
3014 start_ccb->ccb_h.status = CAM_REQ_CMP;
3015 xpt_done(start_ccb);
3022 printf("%s: CCB type %#x not supported\n", __func__,
3023 start_ccb->ccb_h.func_code);
3024 start_ccb->ccb_h.status = CAM_PROVIDE_FAIL;
3025 if (start_ccb->ccb_h.func_code & XPT_FC_DEV_QUEUED) {
3026 xpt_done(start_ccb);
3033 xpt_polled_action(union ccb *start_ccb)
3036 struct cam_sim *sim;
3037 struct cam_devq *devq;
3040 timeout = start_ccb->ccb_h.timeout * 10;
3041 sim = start_ccb->ccb_h.path->bus->sim;
3043 dev = start_ccb->ccb_h.path->device;
3045 mtx_unlock(&dev->device_mtx);
3048 * Steal an opening so that no other queued requests
3049 * can get it before us while we simulate interrupts.
3051 mtx_lock(&devq->send_mtx);
3052 dev->ccbq.dev_openings--;
3053 while((devq->send_openings <= 0 || dev->ccbq.dev_openings < 0) &&
3055 mtx_unlock(&devq->send_mtx);
3058 (*(sim->sim_poll))(sim);
3059 CAM_SIM_UNLOCK(sim);
3061 mtx_lock(&devq->send_mtx);
3063 dev->ccbq.dev_openings++;
3064 mtx_unlock(&devq->send_mtx);
3067 xpt_action(start_ccb);
3068 while(--timeout > 0) {
3070 (*(sim->sim_poll))(sim);
3071 CAM_SIM_UNLOCK(sim);
3073 if ((start_ccb->ccb_h.status & CAM_STATUS_MASK)
3080 * XXX Is it worth adding a sim_timeout entry
3081 * point so we can attempt recovery? If
3082 * this is only used for dumps, I don't think
3085 start_ccb->ccb_h.status = CAM_CMD_TIMEOUT;
3088 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
3091 mtx_lock(&dev->device_mtx);
3095 * Schedule a peripheral driver to receive a ccb when its
3096 * target device has space for more transactions.
3099 xpt_schedule(struct cam_periph *periph, u_int32_t new_priority)
3102 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("xpt_schedule\n"));
3103 cam_periph_assert(periph, MA_OWNED);
3104 if (new_priority < periph->scheduled_priority) {
3105 periph->scheduled_priority = new_priority;
3106 xpt_run_allocq(periph, 0);
3112 * Schedule a device to run on a given queue.
3113 * If the device was inserted as a new entry on the queue,
3114 * return 1 meaning the device queue should be run. If we
3115 * were already queued, implying someone else has already
3116 * started the queue, return 0 so the caller doesn't attempt
3120 xpt_schedule_dev(struct camq *queue, cam_pinfo *pinfo,
3121 u_int32_t new_priority)
3124 u_int32_t old_priority;
3126 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_schedule_dev\n"));
3128 old_priority = pinfo->priority;
3131 * Are we already queued?
3133 if (pinfo->index != CAM_UNQUEUED_INDEX) {
3134 /* Simply reorder based on new priority */
3135 if (new_priority < old_priority) {
3136 camq_change_priority(queue, pinfo->index,
3138 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3139 ("changed priority to %d\n",
3145 /* New entry on the queue */
3146 if (new_priority < old_priority)
3147 pinfo->priority = new_priority;
3149 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3150 ("Inserting onto queue\n"));
3151 pinfo->generation = ++queue->generation;
3152 camq_insert(queue, pinfo);
3159 xpt_run_allocq_task(void *context, int pending)
3161 struct cam_periph *periph = context;
3163 cam_periph_lock(periph);
3164 periph->flags &= ~CAM_PERIPH_RUN_TASK;
3165 xpt_run_allocq(periph, 1);
3166 cam_periph_unlock(periph);
3167 cam_periph_release(periph);
3171 xpt_run_allocq(struct cam_periph *periph, int sleep)
3173 struct cam_ed *device;
3177 cam_periph_assert(periph, MA_OWNED);
3178 if (periph->periph_allocating)
3180 periph->periph_allocating = 1;
3181 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_allocq(%p)\n", periph));
3182 device = periph->path->device;
3185 while ((prio = min(periph->scheduled_priority,
3186 periph->immediate_priority)) != CAM_PRIORITY_NONE &&
3187 (periph->periph_allocated - (ccb != NULL ? 1 : 0) <
3188 device->ccbq.total_openings || prio <= CAM_PRIORITY_OOB)) {
3191 (ccb = xpt_get_ccb_nowait(periph)) == NULL) {
3193 ccb = xpt_get_ccb(periph);
3196 if (periph->flags & CAM_PERIPH_RUN_TASK)
3198 cam_periph_doacquire(periph);
3199 periph->flags |= CAM_PERIPH_RUN_TASK;
3200 taskqueue_enqueue(xsoftc.xpt_taskq,
3201 &periph->periph_run_task);
3204 xpt_setup_ccb(&ccb->ccb_h, periph->path, prio);
3205 if (prio == periph->immediate_priority) {
3206 periph->immediate_priority = CAM_PRIORITY_NONE;
3207 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3208 ("waking cam_periph_getccb()\n"));
3209 SLIST_INSERT_HEAD(&periph->ccb_list, &ccb->ccb_h,
3211 wakeup(&periph->ccb_list);
3213 periph->scheduled_priority = CAM_PRIORITY_NONE;
3214 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3215 ("calling periph_start()\n"));
3216 periph->periph_start(periph, ccb);
3221 xpt_release_ccb(ccb);
3222 periph->periph_allocating = 0;
3226 xpt_run_devq(struct cam_devq *devq)
3228 char cdb_str[(SCSI_MAX_CDBLEN * 3) + 1];
3231 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_devq\n"));
3233 devq->send_queue.qfrozen_cnt++;
3234 while ((devq->send_queue.entries > 0)
3235 && (devq->send_openings > 0)
3236 && (devq->send_queue.qfrozen_cnt <= 1)) {
3237 struct cam_ed *device;
3238 union ccb *work_ccb;
3239 struct cam_sim *sim;
3241 device = (struct cam_ed *)camq_remove(&devq->send_queue,
3243 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3244 ("running device %p\n", device));
3246 work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD);
3247 if (work_ccb == NULL) {
3248 printf("device on run queue with no ccbs???\n");
3252 if ((work_ccb->ccb_h.flags & CAM_HIGH_POWER) != 0) {
3254 mtx_lock(&xsoftc.xpt_highpower_lock);
3255 if (xsoftc.num_highpower <= 0) {
3257 * We got a high power command, but we
3258 * don't have any available slots. Freeze
3259 * the device queue until we have a slot
3262 xpt_freeze_devq_device(device, 1);
3263 STAILQ_INSERT_TAIL(&xsoftc.highpowerq, device,
3266 mtx_unlock(&xsoftc.xpt_highpower_lock);
3270 * Consume a high power slot while
3273 xsoftc.num_highpower--;
3275 mtx_unlock(&xsoftc.xpt_highpower_lock);
3277 cam_ccbq_remove_ccb(&device->ccbq, work_ccb);
3278 cam_ccbq_send_ccb(&device->ccbq, work_ccb);
3279 devq->send_openings--;
3280 devq->send_active++;
3281 xpt_schedule_devq(devq, device);
3282 mtx_unlock(&devq->send_mtx);
3284 if ((work_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0) {
3286 * The client wants to freeze the queue
3287 * after this CCB is sent.
3289 xpt_freeze_devq(work_ccb->ccb_h.path, 1);
3292 /* In Target mode, the peripheral driver knows best... */
3293 if (work_ccb->ccb_h.func_code == XPT_SCSI_IO) {
3294 if ((device->inq_flags & SID_CmdQue) != 0
3295 && work_ccb->csio.tag_action != CAM_TAG_ACTION_NONE)
3296 work_ccb->ccb_h.flags |= CAM_TAG_ACTION_VALID;
3299 * Clear this in case of a retried CCB that
3300 * failed due to a rejected tag.
3302 work_ccb->ccb_h.flags &= ~CAM_TAG_ACTION_VALID;
3305 switch (work_ccb->ccb_h.func_code) {
3307 CAM_DEBUG(work_ccb->ccb_h.path,
3308 CAM_DEBUG_CDB,("%s. CDB: %s\n",
3309 scsi_op_desc(work_ccb->csio.cdb_io.cdb_bytes[0],
3311 scsi_cdb_string(work_ccb->csio.cdb_io.cdb_bytes,
3312 cdb_str, sizeof(cdb_str))));
3315 CAM_DEBUG(work_ccb->ccb_h.path,
3316 CAM_DEBUG_CDB,("%s. ACB: %s\n",
3317 ata_op_string(&work_ccb->ataio.cmd),
3318 ata_cmd_string(&work_ccb->ataio.cmd,
3319 cdb_str, sizeof(cdb_str))));
3326 * Device queues can be shared among multiple SIM instances
3327 * that reside on different busses. Use the SIM from the
3328 * queued device, rather than the one from the calling bus.
3331 lock = (mtx_owned(sim->mtx) == 0);
3334 (*(sim->sim_action))(sim, work_ccb);
3336 CAM_SIM_UNLOCK(sim);
3337 mtx_lock(&devq->send_mtx);
3339 devq->send_queue.qfrozen_cnt--;
3343 * This function merges stuff from the slave ccb into the master ccb, while
3344 * keeping important fields in the master ccb constant.
3347 xpt_merge_ccb(union ccb *master_ccb, union ccb *slave_ccb)
3351 * Pull fields that are valid for peripheral drivers to set
3352 * into the master CCB along with the CCB "payload".
3354 master_ccb->ccb_h.retry_count = slave_ccb->ccb_h.retry_count;
3355 master_ccb->ccb_h.func_code = slave_ccb->ccb_h.func_code;
3356 master_ccb->ccb_h.timeout = slave_ccb->ccb_h.timeout;
3357 master_ccb->ccb_h.flags = slave_ccb->ccb_h.flags;
3358 bcopy(&(&slave_ccb->ccb_h)[1], &(&master_ccb->ccb_h)[1],
3359 sizeof(union ccb) - sizeof(struct ccb_hdr));
3363 xpt_setup_ccb_flags(struct ccb_hdr *ccb_h, struct cam_path *path,
3364 u_int32_t priority, u_int32_t flags)
3367 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_setup_ccb\n"));
3368 ccb_h->pinfo.priority = priority;
3370 ccb_h->path_id = path->bus->path_id;
3372 ccb_h->target_id = path->target->target_id;
3374 ccb_h->target_id = CAM_TARGET_WILDCARD;
3376 ccb_h->target_lun = path->device->lun_id;
3377 ccb_h->pinfo.generation = ++path->device->ccbq.queue.generation;
3379 ccb_h->target_lun = CAM_TARGET_WILDCARD;
3381 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX;
3382 ccb_h->flags = flags;
3387 xpt_setup_ccb(struct ccb_hdr *ccb_h, struct cam_path *path, u_int32_t priority)
3389 xpt_setup_ccb_flags(ccb_h, path, priority, /*flags*/ 0);
3392 /* Path manipulation functions */
3394 xpt_create_path(struct cam_path **new_path_ptr, struct cam_periph *perph,
3395 path_id_t path_id, target_id_t target_id, lun_id_t lun_id)
3397 struct cam_path *path;
3400 path = (struct cam_path *)malloc(sizeof(*path), M_CAMPATH, M_NOWAIT);
3403 status = CAM_RESRC_UNAVAIL;
3406 status = xpt_compile_path(path, perph, path_id, target_id, lun_id);
3407 if (status != CAM_REQ_CMP) {
3408 free(path, M_CAMPATH);
3411 *new_path_ptr = path;
3416 xpt_create_path_unlocked(struct cam_path **new_path_ptr,
3417 struct cam_periph *periph, path_id_t path_id,
3418 target_id_t target_id, lun_id_t lun_id)
3421 return (xpt_create_path(new_path_ptr, periph, path_id, target_id,
3426 xpt_compile_path(struct cam_path *new_path, struct cam_periph *perph,
3427 path_id_t path_id, target_id_t target_id, lun_id_t lun_id)
3430 struct cam_et *target;
3431 struct cam_ed *device;
3434 status = CAM_REQ_CMP; /* Completed without error */
3435 target = NULL; /* Wildcarded */
3436 device = NULL; /* Wildcarded */
3439 * We will potentially modify the EDT, so block interrupts
3440 * that may attempt to create cam paths.
3442 bus = xpt_find_bus(path_id);
3444 status = CAM_PATH_INVALID;
3447 mtx_lock(&bus->eb_mtx);
3448 target = xpt_find_target(bus, target_id);
3449 if (target == NULL) {
3451 struct cam_et *new_target;
3453 new_target = xpt_alloc_target(bus, target_id);
3454 if (new_target == NULL) {
3455 status = CAM_RESRC_UNAVAIL;
3457 target = new_target;
3461 if (target != NULL) {
3462 device = xpt_find_device(target, lun_id);
3463 if (device == NULL) {
3465 struct cam_ed *new_device;
3468 (*(bus->xport->alloc_device))(bus,
3471 if (new_device == NULL) {
3472 status = CAM_RESRC_UNAVAIL;
3474 device = new_device;
3478 mtx_unlock(&bus->eb_mtx);
3482 * Only touch the user's data if we are successful.
3484 if (status == CAM_REQ_CMP) {
3485 new_path->periph = perph;
3486 new_path->bus = bus;
3487 new_path->target = target;
3488 new_path->device = device;
3489 CAM_DEBUG(new_path, CAM_DEBUG_TRACE, ("xpt_compile_path\n"));
3492 xpt_release_device(device);
3494 xpt_release_target(target);
3496 xpt_release_bus(bus);
3502 xpt_clone_path(struct cam_path **new_path_ptr, struct cam_path *path)
3504 struct cam_path *new_path;
3506 new_path = (struct cam_path *)malloc(sizeof(*path), M_CAMPATH, M_NOWAIT);
3507 if (new_path == NULL)
3508 return(CAM_RESRC_UNAVAIL);
3509 xpt_copy_path(new_path, path);
3510 *new_path_ptr = new_path;
3511 return (CAM_REQ_CMP);
3515 xpt_copy_path(struct cam_path *new_path, struct cam_path *path)
3519 if (path->bus != NULL)
3520 xpt_acquire_bus(path->bus);
3521 if (path->target != NULL)
3522 xpt_acquire_target(path->target);
3523 if (path->device != NULL)
3524 xpt_acquire_device(path->device);
3528 xpt_release_path(struct cam_path *path)
3530 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_path\n"));
3531 if (path->device != NULL) {
3532 xpt_release_device(path->device);
3533 path->device = NULL;
3535 if (path->target != NULL) {
3536 xpt_release_target(path->target);
3537 path->target = NULL;
3539 if (path->bus != NULL) {
3540 xpt_release_bus(path->bus);
3546 xpt_free_path(struct cam_path *path)
3549 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_free_path\n"));
3550 xpt_release_path(path);
3551 free(path, M_CAMPATH);
3555 xpt_path_counts(struct cam_path *path, uint32_t *bus_ref,
3556 uint32_t *periph_ref, uint32_t *target_ref, uint32_t *device_ref)
3562 *bus_ref = path->bus->refcount;
3568 *periph_ref = path->periph->refcount;
3575 *target_ref = path->target->refcount;
3581 *device_ref = path->device->refcount;
3588 * Return -1 for failure, 0 for exact match, 1 for match with wildcards
3589 * in path1, 2 for match with wildcards in path2.
3592 xpt_path_comp(struct cam_path *path1, struct cam_path *path2)
3596 if (path1->bus != path2->bus) {
3597 if (path1->bus->path_id == CAM_BUS_WILDCARD)
3599 else if (path2->bus->path_id == CAM_BUS_WILDCARD)
3604 if (path1->target != path2->target) {
3605 if (path1->target->target_id == CAM_TARGET_WILDCARD) {
3608 } else if (path2->target->target_id == CAM_TARGET_WILDCARD)
3613 if (path1->device != path2->device) {
3614 if (path1->device->lun_id == CAM_LUN_WILDCARD) {
3617 } else if (path2->device->lun_id == CAM_LUN_WILDCARD)
3626 xpt_path_comp_dev(struct cam_path *path, struct cam_ed *dev)
3630 if (path->bus != dev->target->bus) {
3631 if (path->bus->path_id == CAM_BUS_WILDCARD)
3633 else if (dev->target->bus->path_id == CAM_BUS_WILDCARD)
3638 if (path->target != dev->target) {
3639 if (path->target->target_id == CAM_TARGET_WILDCARD) {
3642 } else if (dev->target->target_id == CAM_TARGET_WILDCARD)
3647 if (path->device != dev) {
3648 if (path->device->lun_id == CAM_LUN_WILDCARD) {
3651 } else if (dev->lun_id == CAM_LUN_WILDCARD)
3660 xpt_print_path(struct cam_path *path)
3664 printf("(nopath): ");
3666 if (path->periph != NULL)
3667 printf("(%s%d:", path->periph->periph_name,
3668 path->periph->unit_number);
3670 printf("(noperiph:");
3672 if (path->bus != NULL)
3673 printf("%s%d:%d:", path->bus->sim->sim_name,
3674 path->bus->sim->unit_number,
3675 path->bus->sim->bus_id);
3679 if (path->target != NULL)
3680 printf("%d:", path->target->target_id);
3684 if (path->device != NULL)
3685 printf("%jx): ", (uintmax_t)path->device->lun_id);
3692 xpt_print_device(struct cam_ed *device)
3696 printf("(nopath): ");
3698 printf("(noperiph:%s%d:%d:%d:%jx): ", device->sim->sim_name,
3699 device->sim->unit_number,
3700 device->sim->bus_id,
3701 device->target->target_id,
3702 (uintmax_t)device->lun_id);
3707 xpt_print(struct cam_path *path, const char *fmt, ...)
3710 xpt_print_path(path);
3717 xpt_path_string(struct cam_path *path, char *str, size_t str_len)
3721 sbuf_new(&sb, str, str_len, 0);
3724 sbuf_printf(&sb, "(nopath): ");
3726 if (path->periph != NULL)
3727 sbuf_printf(&sb, "(%s%d:", path->periph->periph_name,
3728 path->periph->unit_number);
3730 sbuf_printf(&sb, "(noperiph:");
3732 if (path->bus != NULL)
3733 sbuf_printf(&sb, "%s%d:%d:", path->bus->sim->sim_name,
3734 path->bus->sim->unit_number,
3735 path->bus->sim->bus_id);
3737 sbuf_printf(&sb, "nobus:");
3739 if (path->target != NULL)
3740 sbuf_printf(&sb, "%d:", path->target->target_id);
3742 sbuf_printf(&sb, "X:");
3744 if (path->device != NULL)
3745 sbuf_printf(&sb, "%jx): ",
3746 (uintmax_t)path->device->lun_id);
3748 sbuf_printf(&sb, "X): ");
3752 return(sbuf_len(&sb));
3756 xpt_path_path_id(struct cam_path *path)
3758 return(path->bus->path_id);
3762 xpt_path_target_id(struct cam_path *path)
3764 if (path->target != NULL)
3765 return (path->target->target_id);
3767 return (CAM_TARGET_WILDCARD);
3771 xpt_path_lun_id(struct cam_path *path)
3773 if (path->device != NULL)
3774 return (path->device->lun_id);
3776 return (CAM_LUN_WILDCARD);
3780 xpt_path_sim(struct cam_path *path)
3783 return (path->bus->sim);
3787 xpt_path_periph(struct cam_path *path)
3790 return (path->periph);
3794 xpt_path_legacy_ata_id(struct cam_path *path)
3799 if ((strcmp(path->bus->sim->sim_name, "ata") != 0) &&
3800 strcmp(path->bus->sim->sim_name, "ahcich") != 0 &&
3801 strcmp(path->bus->sim->sim_name, "mvsch") != 0 &&
3802 strcmp(path->bus->sim->sim_name, "siisch") != 0)
3805 if (strcmp(path->bus->sim->sim_name, "ata") == 0 &&
3806 path->bus->sim->unit_number < 2) {
3807 bus_id = path->bus->sim->unit_number;
3811 TAILQ_FOREACH(bus, &xsoftc.xpt_busses, links) {
3812 if (bus == path->bus)
3814 if ((strcmp(bus->sim->sim_name, "ata") == 0 &&
3815 bus->sim->unit_number >= 2) ||
3816 strcmp(bus->sim->sim_name, "ahcich") == 0 ||
3817 strcmp(bus->sim->sim_name, "mvsch") == 0 ||
3818 strcmp(bus->sim->sim_name, "siisch") == 0)
3823 if (path->target != NULL) {
3824 if (path->target->target_id < 2)
3825 return (bus_id * 2 + path->target->target_id);
3829 return (bus_id * 2);
3833 * Release a CAM control block for the caller. Remit the cost of the structure
3834 * to the device referenced by the path. If the this device had no 'credits'
3835 * and peripheral drivers have registered async callbacks for this notification
3839 xpt_release_ccb(union ccb *free_ccb)
3841 struct cam_ed *device;
3842 struct cam_periph *periph;
3844 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_release_ccb\n"));
3845 xpt_path_assert(free_ccb->ccb_h.path, MA_OWNED);
3846 device = free_ccb->ccb_h.path->device;
3847 periph = free_ccb->ccb_h.path->periph;
3849 xpt_free_ccb(free_ccb);
3850 periph->periph_allocated--;
3851 cam_ccbq_release_opening(&device->ccbq);
3852 xpt_run_allocq(periph, 0);
3855 /* Functions accessed by SIM drivers */
3857 static struct xpt_xport xport_default = {
3858 .alloc_device = xpt_alloc_device_default,
3859 .action = xpt_action_default,
3860 .async = xpt_dev_async_default,
3864 * A sim structure, listing the SIM entry points and instance
3865 * identification info is passed to xpt_bus_register to hook the SIM
3866 * into the CAM framework. xpt_bus_register creates a cam_eb entry
3867 * for this new bus and places it in the array of busses and assigns
3868 * it a path_id. The path_id may be influenced by "hard wiring"
3869 * information specified by the user. Once interrupt services are
3870 * available, the bus will be probed.
3873 xpt_bus_register(struct cam_sim *sim, device_t parent, u_int32_t bus)
3875 struct cam_eb *new_bus;
3876 struct cam_eb *old_bus;
3877 struct ccb_pathinq cpi;
3878 struct cam_path *path;
3881 mtx_assert(sim->mtx, MA_OWNED);
3884 new_bus = (struct cam_eb *)malloc(sizeof(*new_bus),
3885 M_CAMXPT, M_NOWAIT|M_ZERO);
3886 if (new_bus == NULL) {
3887 /* Couldn't satisfy request */
3888 return (CAM_RESRC_UNAVAIL);
3891 mtx_init(&new_bus->eb_mtx, "CAM bus lock", NULL, MTX_DEF);
3892 TAILQ_INIT(&new_bus->et_entries);
3895 timevalclear(&new_bus->last_reset);
3897 new_bus->refcount = 1; /* Held until a bus_deregister event */
3898 new_bus->generation = 0;
3901 sim->path_id = new_bus->path_id =
3902 xptpathid(sim->sim_name, sim->unit_number, sim->bus_id);
3903 old_bus = TAILQ_FIRST(&xsoftc.xpt_busses);
3904 while (old_bus != NULL
3905 && old_bus->path_id < new_bus->path_id)
3906 old_bus = TAILQ_NEXT(old_bus, links);
3907 if (old_bus != NULL)
3908 TAILQ_INSERT_BEFORE(old_bus, new_bus, links);
3910 TAILQ_INSERT_TAIL(&xsoftc.xpt_busses, new_bus, links);
3911 xsoftc.bus_generation++;
3915 * Set a default transport so that a PATH_INQ can be issued to
3916 * the SIM. This will then allow for probing and attaching of
3917 * a more appropriate transport.
3919 new_bus->xport = &xport_default;
3921 status = xpt_create_path(&path, /*periph*/NULL, sim->path_id,
3922 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
3923 if (status != CAM_REQ_CMP) {
3924 xpt_release_bus(new_bus);
3925 free(path, M_CAMXPT);
3926 return (CAM_RESRC_UNAVAIL);
3929 xpt_setup_ccb(&cpi.ccb_h, path, CAM_PRIORITY_NORMAL);
3930 cpi.ccb_h.func_code = XPT_PATH_INQ;
3931 xpt_action((union ccb *)&cpi);
3933 if (cpi.ccb_h.status == CAM_REQ_CMP) {
3934 switch (cpi.transport) {
3942 new_bus->xport = scsi_get_xport();
3946 new_bus->xport = ata_get_xport();
3949 new_bus->xport = &xport_default;
3954 /* Notify interested parties */
3955 if (sim->path_id != CAM_XPT_PATH_ID) {
3957 xpt_async(AC_PATH_REGISTERED, path, &cpi);
3958 if ((cpi.hba_misc & PIM_NOSCAN) == 0) {
3959 union ccb *scan_ccb;
3961 /* Initiate bus rescan. */
3962 scan_ccb = xpt_alloc_ccb_nowait();
3963 if (scan_ccb != NULL) {
3964 scan_ccb->ccb_h.path = path;
3965 scan_ccb->ccb_h.func_code = XPT_SCAN_BUS;
3966 scan_ccb->crcn.flags = 0;
3967 xpt_rescan(scan_ccb);
3970 "Can't allocate CCB to scan bus\n");
3971 xpt_free_path(path);
3974 xpt_free_path(path);
3976 xpt_free_path(path);
3977 return (CAM_SUCCESS);
3981 xpt_bus_deregister(path_id_t pathid)
3983 struct cam_path bus_path;
3986 status = xpt_compile_path(&bus_path, NULL, pathid,
3987 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
3988 if (status != CAM_REQ_CMP)
3991 xpt_async(AC_LOST_DEVICE, &bus_path, NULL);
3992 xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL);
3994 /* Release the reference count held while registered. */
3995 xpt_release_bus(bus_path.bus);
3996 xpt_release_path(&bus_path);
3998 return (CAM_REQ_CMP);
4002 xptnextfreepathid(void)
4008 mtx_assert(&xsoftc.xpt_topo_lock, MA_OWNED);
4010 bus = TAILQ_FIRST(&xsoftc.xpt_busses);
4012 /* Find an unoccupied pathid */
4013 while (bus != NULL && bus->path_id <= pathid) {
4014 if (bus->path_id == pathid)
4016 bus = TAILQ_NEXT(bus, links);
4020 * Ensure that this pathid is not reserved for
4021 * a bus that may be registered in the future.
4023 if (resource_string_value("scbus", pathid, "at", &strval) == 0) {
4025 /* Start the search over */
4032 xptpathid(const char *sim_name, int sim_unit, int sim_bus)
4039 pathid = CAM_XPT_PATH_ID;
4040 snprintf(buf, sizeof(buf), "%s%d", sim_name, sim_unit);
4041 if (strcmp(buf, "xpt0") == 0 && sim_bus == 0)
4044 while ((resource_find_match(&i, &dname, &dunit, "at", buf)) == 0) {
4045 if (strcmp(dname, "scbus")) {
4046 /* Avoid a bit of foot shooting. */
4049 if (dunit < 0) /* unwired?! */
4051 if (resource_int_value("scbus", dunit, "bus", &val) == 0) {
4052 if (sim_bus == val) {
4056 } else if (sim_bus == 0) {
4057 /* Unspecified matches bus 0 */
4061 printf("Ambiguous scbus configuration for %s%d "
4062 "bus %d, cannot wire down. The kernel "
4063 "config entry for scbus%d should "
4064 "specify a controller bus.\n"
4065 "Scbus will be assigned dynamically.\n",
4066 sim_name, sim_unit, sim_bus, dunit);
4071 if (pathid == CAM_XPT_PATH_ID)
4072 pathid = xptnextfreepathid();
4077 xpt_async_string(u_int32_t async_code)
4080 switch (async_code) {
4081 case AC_BUS_RESET: return ("AC_BUS_RESET");
4082 case AC_UNSOL_RESEL: return ("AC_UNSOL_RESEL");
4083 case AC_SCSI_AEN: return ("AC_SCSI_AEN");
4084 case AC_SENT_BDR: return ("AC_SENT_BDR");
4085 case AC_PATH_REGISTERED: return ("AC_PATH_REGISTERED");
4086 case AC_PATH_DEREGISTERED: return ("AC_PATH_DEREGISTERED");
4087 case AC_FOUND_DEVICE: return ("AC_FOUND_DEVICE");
4088 case AC_LOST_DEVICE: return ("AC_LOST_DEVICE");
4089 case AC_TRANSFER_NEG: return ("AC_TRANSFER_NEG");
4090 case AC_INQ_CHANGED: return ("AC_INQ_CHANGED");
4091 case AC_GETDEV_CHANGED: return ("AC_GETDEV_CHANGED");
4092 case AC_CONTRACT: return ("AC_CONTRACT");
4093 case AC_ADVINFO_CHANGED: return ("AC_ADVINFO_CHANGED");
4094 case AC_UNIT_ATTENTION: return ("AC_UNIT_ATTENTION");
4096 return ("AC_UNKNOWN");
4100 xpt_async_size(u_int32_t async_code)
4103 switch (async_code) {
4104 case AC_BUS_RESET: return (0);
4105 case AC_UNSOL_RESEL: return (0);
4106 case AC_SCSI_AEN: return (0);
4107 case AC_SENT_BDR: return (0);
4108 case AC_PATH_REGISTERED: return (sizeof(struct ccb_pathinq));
4109 case AC_PATH_DEREGISTERED: return (0);
4110 case AC_FOUND_DEVICE: return (sizeof(struct ccb_getdev));
4111 case AC_LOST_DEVICE: return (0);
4112 case AC_TRANSFER_NEG: return (sizeof(struct ccb_trans_settings));
4113 case AC_INQ_CHANGED: return (0);
4114 case AC_GETDEV_CHANGED: return (0);
4115 case AC_CONTRACT: return (sizeof(struct ac_contract));
4116 case AC_ADVINFO_CHANGED: return (-1);
4117 case AC_UNIT_ATTENTION: return (sizeof(struct ccb_scsiio));
4123 xpt_async_process_dev(struct cam_ed *device, void *arg)
4125 union ccb *ccb = arg;
4126 struct cam_path *path = ccb->ccb_h.path;
4127 void *async_arg = ccb->casync.async_arg_ptr;
4128 u_int32_t async_code = ccb->casync.async_code;
4131 if (path->device != device
4132 && path->device->lun_id != CAM_LUN_WILDCARD
4133 && device->lun_id != CAM_LUN_WILDCARD)
4137 * The async callback could free the device.
4138 * If it is a broadcast async, it doesn't hold
4139 * device reference, so take our own reference.
4141 xpt_acquire_device(device);
4144 * If async for specific device is to be delivered to
4145 * the wildcard client, take the specific device lock.
4146 * XXX: We may need a way for client to specify it.
4148 if ((device->lun_id == CAM_LUN_WILDCARD &&
4149 path->device->lun_id != CAM_LUN_WILDCARD) ||
4150 (device->target->target_id == CAM_TARGET_WILDCARD &&
4151 path->target->target_id != CAM_TARGET_WILDCARD) ||
4152 (device->target->bus->path_id == CAM_BUS_WILDCARD &&
4153 path->target->bus->path_id != CAM_BUS_WILDCARD)) {
4154 mtx_unlock(&device->device_mtx);
4155 xpt_path_lock(path);
4160 (*(device->target->bus->xport->async))(async_code,
4161 device->target->bus, device->target, device, async_arg);
4162 xpt_async_bcast(&device->asyncs, async_code, path, async_arg);
4165 xpt_path_unlock(path);
4166 mtx_lock(&device->device_mtx);
4168 xpt_release_device(device);
4173 xpt_async_process_tgt(struct cam_et *target, void *arg)
4175 union ccb *ccb = arg;
4176 struct cam_path *path = ccb->ccb_h.path;
4178 if (path->target != target
4179 && path->target->target_id != CAM_TARGET_WILDCARD
4180 && target->target_id != CAM_TARGET_WILDCARD)
4183 if (ccb->casync.async_code == AC_SENT_BDR) {
4184 /* Update our notion of when the last reset occurred */
4185 microtime(&target->last_reset);
4188 return (xptdevicetraverse(target, NULL, xpt_async_process_dev, ccb));
4192 xpt_async_process(struct cam_periph *periph, union ccb *ccb)
4195 struct cam_path *path;
4197 u_int32_t async_code;
4199 path = ccb->ccb_h.path;
4200 async_code = ccb->casync.async_code;
4201 async_arg = ccb->casync.async_arg_ptr;
4202 CAM_DEBUG(path, CAM_DEBUG_TRACE | CAM_DEBUG_INFO,
4203 ("xpt_async(%s)\n", xpt_async_string(async_code)));
4206 if (async_code == AC_BUS_RESET) {
4207 /* Update our notion of when the last reset occurred */
4208 microtime(&bus->last_reset);
4211 xpttargettraverse(bus, NULL, xpt_async_process_tgt, ccb);
4214 * If this wasn't a fully wildcarded async, tell all
4215 * clients that want all async events.
4217 if (bus != xpt_periph->path->bus) {
4218 xpt_path_lock(xpt_periph->path);
4219 xpt_async_process_dev(xpt_periph->path->device, ccb);
4220 xpt_path_unlock(xpt_periph->path);
4223 if (path->device != NULL && path->device->lun_id != CAM_LUN_WILDCARD)
4224 xpt_release_devq(path, 1, TRUE);
4226 xpt_release_simq(path->bus->sim, TRUE);
4227 if (ccb->casync.async_arg_size > 0)
4228 free(async_arg, M_CAMXPT);
4229 xpt_free_path(path);
4234 xpt_async_bcast(struct async_list *async_head,
4235 u_int32_t async_code,
4236 struct cam_path *path, void *async_arg)
4238 struct async_node *cur_entry;
4241 cur_entry = SLIST_FIRST(async_head);
4242 while (cur_entry != NULL) {
4243 struct async_node *next_entry;
4245 * Grab the next list entry before we call the current
4246 * entry's callback. This is because the callback function
4247 * can delete its async callback entry.
4249 next_entry = SLIST_NEXT(cur_entry, links);
4250 if ((cur_entry->event_enable & async_code) != 0) {
4251 lock = cur_entry->event_lock;
4253 CAM_SIM_LOCK(path->device->sim);
4254 cur_entry->callback(cur_entry->callback_arg,
4258 CAM_SIM_UNLOCK(path->device->sim);
4260 cur_entry = next_entry;
4265 xpt_async(u_int32_t async_code, struct cam_path *path, void *async_arg)
4270 ccb = xpt_alloc_ccb_nowait();
4272 xpt_print(path, "Can't allocate CCB to send %s\n",
4273 xpt_async_string(async_code));
4277 if (xpt_clone_path(&ccb->ccb_h.path, path) != CAM_REQ_CMP) {
4278 xpt_print(path, "Can't allocate path to send %s\n",
4279 xpt_async_string(async_code));
4283 ccb->ccb_h.path->periph = NULL;
4284 ccb->ccb_h.func_code = XPT_ASYNC;
4285 ccb->ccb_h.cbfcnp = xpt_async_process;
4286 ccb->ccb_h.flags |= CAM_UNLOCKED;
4287 ccb->casync.async_code = async_code;
4288 ccb->casync.async_arg_size = 0;
4289 size = xpt_async_size(async_code);
4290 if (size > 0 && async_arg != NULL) {
4291 ccb->casync.async_arg_ptr = malloc(size, M_CAMXPT, M_NOWAIT);
4292 if (ccb->casync.async_arg_ptr == NULL) {
4293 xpt_print(path, "Can't allocate argument to send %s\n",
4294 xpt_async_string(async_code));
4295 xpt_free_path(ccb->ccb_h.path);
4299 memcpy(ccb->casync.async_arg_ptr, async_arg, size);
4300 ccb->casync.async_arg_size = size;
4301 } else if (size < 0) {
4302 ccb->casync.async_arg_ptr = async_arg;
4303 ccb->casync.async_arg_size = size;
4305 if (path->device != NULL && path->device->lun_id != CAM_LUN_WILDCARD)
4306 xpt_freeze_devq(path, 1);
4308 xpt_freeze_simq(path->bus->sim, 1);
4313 xpt_dev_async_default(u_int32_t async_code, struct cam_eb *bus,
4314 struct cam_et *target, struct cam_ed *device,
4319 * We only need to handle events for real devices.
4321 if (target->target_id == CAM_TARGET_WILDCARD
4322 || device->lun_id == CAM_LUN_WILDCARD)
4325 printf("%s called\n", __func__);
4329 xpt_freeze_devq_device(struct cam_ed *dev, u_int count)
4331 struct cam_devq *devq;
4334 devq = dev->sim->devq;
4335 mtx_assert(&devq->send_mtx, MA_OWNED);
4336 CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE,
4337 ("xpt_freeze_devq_device(%d) %u->%u\n", count,
4338 dev->ccbq.queue.qfrozen_cnt, dev->ccbq.queue.qfrozen_cnt + count));
4339 freeze = (dev->ccbq.queue.qfrozen_cnt += count);
4340 /* Remove frozen device from sendq. */
4341 if (device_is_queued(dev))
4342 camq_remove(&devq->send_queue, dev->devq_entry.index);
4347 xpt_freeze_devq(struct cam_path *path, u_int count)
4349 struct cam_ed *dev = path->device;
4350 struct cam_devq *devq;
4353 devq = dev->sim->devq;
4354 mtx_lock(&devq->send_mtx);
4355 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_freeze_devq(%d)\n", count));
4356 freeze = xpt_freeze_devq_device(dev, count);
4357 mtx_unlock(&devq->send_mtx);
4362 xpt_freeze_simq(struct cam_sim *sim, u_int count)
4364 struct cam_devq *devq;
4368 mtx_lock(&devq->send_mtx);
4369 freeze = (devq->send_queue.qfrozen_cnt += count);
4370 mtx_unlock(&devq->send_mtx);
4375 xpt_release_devq_timeout(void *arg)
4378 struct cam_devq *devq;
4380 dev = (struct cam_ed *)arg;
4381 CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE, ("xpt_release_devq_timeout\n"));
4382 devq = dev->sim->devq;
4383 mtx_assert(&devq->send_mtx, MA_OWNED);
4384 if (xpt_release_devq_device(dev, /*count*/1, /*run_queue*/TRUE))
4389 xpt_release_devq(struct cam_path *path, u_int count, int run_queue)
4392 struct cam_devq *devq;
4394 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_devq(%d, %d)\n",
4397 devq = dev->sim->devq;
4398 mtx_lock(&devq->send_mtx);
4399 if (xpt_release_devq_device(dev, count, run_queue))
4400 xpt_run_devq(dev->sim->devq);
4401 mtx_unlock(&devq->send_mtx);
4405 xpt_release_devq_device(struct cam_ed *dev, u_int count, int run_queue)
4408 mtx_assert(&dev->sim->devq->send_mtx, MA_OWNED);
4409 CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE,
4410 ("xpt_release_devq_device(%d, %d) %u->%u\n", count, run_queue,
4411 dev->ccbq.queue.qfrozen_cnt, dev->ccbq.queue.qfrozen_cnt - count));
4412 if (count > dev->ccbq.queue.qfrozen_cnt) {
4414 printf("xpt_release_devq(): requested %u > present %u\n",
4415 count, dev->ccbq.queue.qfrozen_cnt);
4417 count = dev->ccbq.queue.qfrozen_cnt;
4419 dev->ccbq.queue.qfrozen_cnt -= count;
4420 if (dev->ccbq.queue.qfrozen_cnt == 0) {
4422 * No longer need to wait for a successful
4423 * command completion.
4425 dev->flags &= ~CAM_DEV_REL_ON_COMPLETE;
4427 * Remove any timeouts that might be scheduled
4428 * to release this queue.
4430 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) {
4431 callout_stop(&dev->callout);
4432 dev->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING;
4435 * Now that we are unfrozen schedule the
4436 * device so any pending transactions are
4439 xpt_schedule_devq(dev->sim->devq, dev);
4446 xpt_release_simq(struct cam_sim *sim, int run_queue)
4448 struct cam_devq *devq;
4451 mtx_lock(&devq->send_mtx);
4452 if (devq->send_queue.qfrozen_cnt <= 0) {
4454 printf("xpt_release_simq: requested 1 > present %u\n",
4455 devq->send_queue.qfrozen_cnt);
4458 devq->send_queue.qfrozen_cnt--;
4459 if (devq->send_queue.qfrozen_cnt == 0) {
4461 * If there is a timeout scheduled to release this
4462 * sim queue, remove it. The queue frozen count is
4465 if ((sim->flags & CAM_SIM_REL_TIMEOUT_PENDING) != 0){
4466 callout_stop(&sim->callout);
4467 sim->flags &= ~CAM_SIM_REL_TIMEOUT_PENDING;
4471 * Now that we are unfrozen run the send queue.
4473 xpt_run_devq(sim->devq);
4476 mtx_unlock(&devq->send_mtx);
4480 * XXX Appears to be unused.
4483 xpt_release_simq_timeout(void *arg)
4485 struct cam_sim *sim;
4487 sim = (struct cam_sim *)arg;
4488 xpt_release_simq(sim, /* run_queue */ TRUE);
4492 xpt_done(union ccb *done_ccb)
4494 struct cam_doneq *queue;
4497 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_done\n"));
4498 if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) == 0)
4501 hash = (done_ccb->ccb_h.path_id + done_ccb->ccb_h.target_id +
4502 done_ccb->ccb_h.target_lun) % cam_num_doneqs;
4503 queue = &cam_doneqs[hash];
4504 mtx_lock(&queue->cam_doneq_mtx);
4505 run = (queue->cam_doneq_sleep && STAILQ_EMPTY(&queue->cam_doneq));
4506 STAILQ_INSERT_TAIL(&queue->cam_doneq, &done_ccb->ccb_h, sim_links.stqe);
4507 done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX;
4508 mtx_unlock(&queue->cam_doneq_mtx);
4510 wakeup(&queue->cam_doneq);
4514 xpt_done_direct(union ccb *done_ccb)
4517 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_done_direct\n"));
4518 if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) == 0)
4521 xpt_done_process(&done_ccb->ccb_h);
4529 new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_WAITOK);
4534 xpt_alloc_ccb_nowait()
4538 new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_NOWAIT);
4543 xpt_free_ccb(union ccb *free_ccb)
4545 free(free_ccb, M_CAMCCB);
4550 /* Private XPT functions */
4553 * Get a CAM control block for the caller. Charge the structure to the device
4554 * referenced by the path. If we don't have sufficient resources to allocate
4555 * more ccbs, we return NULL.
4558 xpt_get_ccb_nowait(struct cam_periph *periph)
4562 new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_NOWAIT);
4563 if (new_ccb == NULL)
4565 periph->periph_allocated++;
4566 cam_ccbq_take_opening(&periph->path->device->ccbq);
4571 xpt_get_ccb(struct cam_periph *periph)
4575 cam_periph_unlock(periph);
4576 new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_WAITOK);
4577 cam_periph_lock(periph);
4578 periph->periph_allocated++;
4579 cam_ccbq_take_opening(&periph->path->device->ccbq);
4584 cam_periph_getccb(struct cam_periph *periph, u_int32_t priority)
4586 struct ccb_hdr *ccb_h;
4588 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("cam_periph_getccb\n"));
4589 cam_periph_assert(periph, MA_OWNED);
4590 while ((ccb_h = SLIST_FIRST(&periph->ccb_list)) == NULL ||
4591 ccb_h->pinfo.priority != priority) {
4592 if (priority < periph->immediate_priority) {
4593 periph->immediate_priority = priority;
4594 xpt_run_allocq(periph, 0);
4596 cam_periph_sleep(periph, &periph->ccb_list, PRIBIO,
4599 SLIST_REMOVE_HEAD(&periph->ccb_list, periph_links.sle);
4600 return ((union ccb *)ccb_h);
4604 xpt_acquire_bus(struct cam_eb *bus)
4613 xpt_release_bus(struct cam_eb *bus)
4617 KASSERT(bus->refcount >= 1, ("bus->refcount >= 1"));
4618 if (--bus->refcount > 0) {
4622 TAILQ_REMOVE(&xsoftc.xpt_busses, bus, links);
4623 xsoftc.bus_generation++;
4625 KASSERT(TAILQ_EMPTY(&bus->et_entries),
4626 ("destroying bus, but target list is not empty"));
4627 cam_sim_release(bus->sim);
4628 mtx_destroy(&bus->eb_mtx);
4629 free(bus, M_CAMXPT);
4632 static struct cam_et *
4633 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id)
4635 struct cam_et *cur_target, *target;
4637 mtx_assert(&xsoftc.xpt_topo_lock, MA_OWNED);
4638 mtx_assert(&bus->eb_mtx, MA_OWNED);
4639 target = (struct cam_et *)malloc(sizeof(*target), M_CAMXPT,
4644 TAILQ_INIT(&target->ed_entries);
4646 target->target_id = target_id;
4647 target->refcount = 1;
4648 target->generation = 0;
4649 target->luns = NULL;
4650 mtx_init(&target->luns_mtx, "CAM LUNs lock", NULL, MTX_DEF);
4651 timevalclear(&target->last_reset);
4653 * Hold a reference to our parent bus so it
4654 * will not go away before we do.
4658 /* Insertion sort into our bus's target list */
4659 cur_target = TAILQ_FIRST(&bus->et_entries);
4660 while (cur_target != NULL && cur_target->target_id < target_id)
4661 cur_target = TAILQ_NEXT(cur_target, links);
4662 if (cur_target != NULL) {
4663 TAILQ_INSERT_BEFORE(cur_target, target, links);
4665 TAILQ_INSERT_TAIL(&bus->et_entries, target, links);
4672 xpt_acquire_target(struct cam_et *target)
4674 struct cam_eb *bus = target->bus;
4676 mtx_lock(&bus->eb_mtx);
4678 mtx_unlock(&bus->eb_mtx);
4682 xpt_release_target(struct cam_et *target)
4684 struct cam_eb *bus = target->bus;
4686 mtx_lock(&bus->eb_mtx);
4687 if (--target->refcount > 0) {
4688 mtx_unlock(&bus->eb_mtx);
4691 TAILQ_REMOVE(&bus->et_entries, target, links);
4693 mtx_unlock(&bus->eb_mtx);
4694 KASSERT(TAILQ_EMPTY(&target->ed_entries),
4695 ("destroying target, but device list is not empty"));
4696 xpt_release_bus(bus);
4697 mtx_destroy(&target->luns_mtx);
4699 free(target->luns, M_CAMXPT);
4700 free(target, M_CAMXPT);
4703 static struct cam_ed *
4704 xpt_alloc_device_default(struct cam_eb *bus, struct cam_et *target,
4707 struct cam_ed *device;
4709 device = xpt_alloc_device(bus, target, lun_id);
4713 device->mintags = 1;
4714 device->maxtags = 1;
4719 xpt_destroy_device(void *context, int pending)
4721 struct cam_ed *device = context;
4723 mtx_lock(&device->device_mtx);
4724 mtx_destroy(&device->device_mtx);
4725 free(device, M_CAMDEV);
4729 xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, lun_id_t lun_id)
4731 struct cam_ed *cur_device, *device;
4732 struct cam_devq *devq;
4735 mtx_assert(&bus->eb_mtx, MA_OWNED);
4736 /* Make space for us in the device queue on our bus */
4737 devq = bus->sim->devq;
4738 mtx_lock(&devq->send_mtx);
4739 status = cam_devq_resize(devq, devq->send_queue.array_size + 1);
4740 mtx_unlock(&devq->send_mtx);
4741 if (status != CAM_REQ_CMP)
4744 device = (struct cam_ed *)malloc(sizeof(*device),
4745 M_CAMDEV, M_NOWAIT|M_ZERO);
4749 cam_init_pinfo(&device->devq_entry);
4750 device->target = target;
4751 device->lun_id = lun_id;
4752 device->sim = bus->sim;
4753 if (cam_ccbq_init(&device->ccbq,
4754 bus->sim->max_dev_openings) != 0) {
4755 free(device, M_CAMDEV);
4758 SLIST_INIT(&device->asyncs);
4759 SLIST_INIT(&device->periphs);
4760 device->generation = 0;
4761 device->flags = CAM_DEV_UNCONFIGURED;
4762 device->tag_delay_count = 0;
4763 device->tag_saved_openings = 0;
4764 device->refcount = 1;
4765 mtx_init(&device->device_mtx, "CAM device lock", NULL, MTX_DEF);
4766 callout_init_mtx(&device->callout, &devq->send_mtx, 0);
4767 TASK_INIT(&device->device_destroy_task, 0, xpt_destroy_device, device);
4769 * Hold a reference to our parent bus so it
4770 * will not go away before we do.
4774 cur_device = TAILQ_FIRST(&target->ed_entries);
4775 while (cur_device != NULL && cur_device->lun_id < lun_id)
4776 cur_device = TAILQ_NEXT(cur_device, links);
4777 if (cur_device != NULL)
4778 TAILQ_INSERT_BEFORE(cur_device, device, links);
4780 TAILQ_INSERT_TAIL(&target->ed_entries, device, links);
4781 target->generation++;
4786 xpt_acquire_device(struct cam_ed *device)
4788 struct cam_eb *bus = device->target->bus;
4790 mtx_lock(&bus->eb_mtx);
4792 mtx_unlock(&bus->eb_mtx);
4796 xpt_release_device(struct cam_ed *device)
4798 struct cam_eb *bus = device->target->bus;
4799 struct cam_devq *devq;
4801 mtx_lock(&bus->eb_mtx);
4802 if (--device->refcount > 0) {
4803 mtx_unlock(&bus->eb_mtx);
4807 TAILQ_REMOVE(&device->target->ed_entries, device,links);
4808 device->target->generation++;
4809 mtx_unlock(&bus->eb_mtx);
4811 /* Release our slot in the devq */
4812 devq = bus->sim->devq;
4813 mtx_lock(&devq->send_mtx);
4814 cam_devq_resize(devq, devq->send_queue.array_size - 1);
4815 mtx_unlock(&devq->send_mtx);
4817 KASSERT(SLIST_EMPTY(&device->periphs),
4818 ("destroying device, but periphs list is not empty"));
4819 KASSERT(device->devq_entry.index == CAM_UNQUEUED_INDEX,
4820 ("destroying device while still queued for ccbs"));
4822 if ((device->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0)
4823 callout_stop(&device->callout);
4825 xpt_release_target(device->target);
4827 cam_ccbq_fini(&device->ccbq);
4829 * Free allocated memory. free(9) does nothing if the
4830 * supplied pointer is NULL, so it is safe to call without
4833 free(device->supported_vpds, M_CAMXPT);
4834 free(device->device_id, M_CAMXPT);
4835 free(device->ext_inq, M_CAMXPT);
4836 free(device->physpath, M_CAMXPT);
4837 free(device->rcap_buf, M_CAMXPT);
4838 free(device->serial_num, M_CAMXPT);
4839 taskqueue_enqueue(xsoftc.xpt_taskq, &device->device_destroy_task);
4843 xpt_dev_ccbq_resize(struct cam_path *path, int newopenings)
4849 mtx_lock(&dev->sim->devq->send_mtx);
4850 result = cam_ccbq_resize(&dev->ccbq, newopenings);
4851 mtx_unlock(&dev->sim->devq->send_mtx);
4852 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
4853 || (dev->inq_flags & SID_CmdQue) != 0)
4854 dev->tag_saved_openings = newopenings;
4858 static struct cam_eb *
4859 xpt_find_bus(path_id_t path_id)
4864 for (bus = TAILQ_FIRST(&xsoftc.xpt_busses);
4866 bus = TAILQ_NEXT(bus, links)) {
4867 if (bus->path_id == path_id) {
4876 static struct cam_et *
4877 xpt_find_target(struct cam_eb *bus, target_id_t target_id)
4879 struct cam_et *target;
4881 mtx_assert(&bus->eb_mtx, MA_OWNED);
4882 for (target = TAILQ_FIRST(&bus->et_entries);
4884 target = TAILQ_NEXT(target, links)) {
4885 if (target->target_id == target_id) {
4893 static struct cam_ed *
4894 xpt_find_device(struct cam_et *target, lun_id_t lun_id)
4896 struct cam_ed *device;
4898 mtx_assert(&target->bus->eb_mtx, MA_OWNED);
4899 for (device = TAILQ_FIRST(&target->ed_entries);
4901 device = TAILQ_NEXT(device, links)) {
4902 if (device->lun_id == lun_id) {
4911 xpt_start_tags(struct cam_path *path)
4913 struct ccb_relsim crs;
4914 struct cam_ed *device;
4915 struct cam_sim *sim;
4918 device = path->device;
4919 sim = path->bus->sim;
4920 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT;
4921 xpt_freeze_devq(path, /*count*/1);
4922 device->inq_flags |= SID_CmdQue;
4923 if (device->tag_saved_openings != 0)
4924 newopenings = device->tag_saved_openings;
4926 newopenings = min(device->maxtags,
4927 sim->max_tagged_dev_openings);
4928 xpt_dev_ccbq_resize(path, newopenings);
4929 xpt_async(AC_GETDEV_CHANGED, path, NULL);
4930 xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL);
4931 crs.ccb_h.func_code = XPT_REL_SIMQ;
4932 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY;
4934 = crs.release_timeout
4937 xpt_action((union ccb *)&crs);
4941 xpt_stop_tags(struct cam_path *path)
4943 struct ccb_relsim crs;
4944 struct cam_ed *device;
4945 struct cam_sim *sim;
4947 device = path->device;
4948 sim = path->bus->sim;
4949 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT;
4950 device->tag_delay_count = 0;
4951 xpt_freeze_devq(path, /*count*/1);
4952 device->inq_flags &= ~SID_CmdQue;
4953 xpt_dev_ccbq_resize(path, sim->max_dev_openings);
4954 xpt_async(AC_GETDEV_CHANGED, path, NULL);
4955 xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL);
4956 crs.ccb_h.func_code = XPT_REL_SIMQ;
4957 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY;
4959 = crs.release_timeout
4962 xpt_action((union ccb *)&crs);
4966 xpt_boot_delay(void *arg)
4973 xpt_config(void *arg)
4976 * Now that interrupts are enabled, go find our devices
4978 if (taskqueue_start_threads(&xsoftc.xpt_taskq, 1, PRIBIO, "CAM taskq"))
4979 printf("xpt_config: failed to create taskqueue thread.\n");
4981 /* Setup debugging path */
4982 if (cam_dflags != CAM_DEBUG_NONE) {
4983 if (xpt_create_path(&cam_dpath, NULL,
4984 CAM_DEBUG_BUS, CAM_DEBUG_TARGET,
4985 CAM_DEBUG_LUN) != CAM_REQ_CMP) {
4986 printf("xpt_config: xpt_create_path() failed for debug"
4987 " target %d:%d:%d, debugging disabled\n",
4988 CAM_DEBUG_BUS, CAM_DEBUG_TARGET, CAM_DEBUG_LUN);
4989 cam_dflags = CAM_DEBUG_NONE;
4994 periphdriver_init(1);
4996 callout_init(&xsoftc.boot_callout, 1);
4997 callout_reset_sbt(&xsoftc.boot_callout, SBT_1MS * xsoftc.boot_delay, 0,
4998 xpt_boot_delay, NULL, 0);
4999 /* Fire up rescan thread. */
5000 if (kproc_kthread_add(xpt_scanner_thread, NULL, &cam_proc, NULL, 0, 0,
5001 "cam", "scanner")) {
5002 printf("xpt_config: failed to create rescan thread.\n");
5010 xsoftc.buses_to_config++;
5015 xpt_release_boot(void)
5018 xsoftc.buses_to_config--;
5019 if (xsoftc.buses_to_config == 0 && xsoftc.buses_config_done == 0) {
5020 struct xpt_task *task;
5022 xsoftc.buses_config_done = 1;
5024 /* Call manually because we don't have any busses */
5025 task = malloc(sizeof(struct xpt_task), M_CAMXPT, M_NOWAIT);
5027 TASK_INIT(&task->task, 0, xpt_finishconfig_task, task);
5028 taskqueue_enqueue(taskqueue_thread, &task->task);
5035 * If the given device only has one peripheral attached to it, and if that
5036 * peripheral is the passthrough driver, announce it. This insures that the
5037 * user sees some sort of announcement for every peripheral in their system.
5040 xptpassannouncefunc(struct cam_ed *device, void *arg)
5042 struct cam_periph *periph;
5045 for (periph = SLIST_FIRST(&device->periphs), i = 0; periph != NULL;
5046 periph = SLIST_NEXT(periph, periph_links), i++);
5048 periph = SLIST_FIRST(&device->periphs);
5050 && (strncmp(periph->periph_name, "pass", 4) == 0))
5051 xpt_announce_periph(periph, NULL);
5057 xpt_finishconfig_task(void *context, int pending)
5060 periphdriver_init(2);
5062 * Check for devices with no "standard" peripheral driver
5063 * attached. For any devices like that, announce the
5064 * passthrough driver so the user will see something.
5067 xpt_for_all_devices(xptpassannouncefunc, NULL);
5069 /* Release our hook so that the boot can continue. */
5070 config_intrhook_disestablish(xsoftc.xpt_config_hook);
5071 free(xsoftc.xpt_config_hook, M_CAMXPT);
5072 xsoftc.xpt_config_hook = NULL;
5074 free(context, M_CAMXPT);
5078 xpt_register_async(int event, ac_callback_t *cbfunc, void *cbarg,
5079 struct cam_path *path)
5081 struct ccb_setasync csa;
5086 status = xpt_create_path(&path, /*periph*/NULL, CAM_XPT_PATH_ID,
5087 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
5088 if (status != CAM_REQ_CMP)
5090 xpt_path_lock(path);
5094 xpt_setup_ccb(&csa.ccb_h, path, CAM_PRIORITY_NORMAL);
5095 csa.ccb_h.func_code = XPT_SASYNC_CB;
5096 csa.event_enable = event;
5097 csa.callback = cbfunc;
5098 csa.callback_arg = cbarg;
5099 xpt_action((union ccb *)&csa);
5100 status = csa.ccb_h.status;
5103 xpt_path_unlock(path);
5104 xpt_free_path(path);
5107 if ((status == CAM_REQ_CMP) &&
5108 (csa.event_enable & AC_FOUND_DEVICE)) {
5110 * Get this peripheral up to date with all
5111 * the currently existing devices.
5113 xpt_for_all_devices(xptsetasyncfunc, &csa);
5115 if ((status == CAM_REQ_CMP) &&
5116 (csa.event_enable & AC_PATH_REGISTERED)) {
5118 * Get this peripheral up to date with all
5119 * the currently existing busses.
5121 xpt_for_all_busses(xptsetasyncbusfunc, &csa);
5128 xptaction(struct cam_sim *sim, union ccb *work_ccb)
5130 CAM_DEBUG(work_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xptaction\n"));
5132 switch (work_ccb->ccb_h.func_code) {
5133 /* Common cases first */
5134 case XPT_PATH_INQ: /* Path routing inquiry */
5136 struct ccb_pathinq *cpi;
5138 cpi = &work_ccb->cpi;
5139 cpi->version_num = 1; /* XXX??? */
5140 cpi->hba_inquiry = 0;
5141 cpi->target_sprt = 0;
5143 cpi->hba_eng_cnt = 0;
5144 cpi->max_target = 0;
5146 cpi->initiator_id = 0;
5147 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
5148 strncpy(cpi->hba_vid, "", HBA_IDLEN);
5149 strncpy(cpi->dev_name, sim->sim_name, DEV_IDLEN);
5150 cpi->unit_number = sim->unit_number;
5151 cpi->bus_id = sim->bus_id;
5152 cpi->base_transfer_speed = 0;
5153 cpi->protocol = PROTO_UNSPECIFIED;
5154 cpi->protocol_version = PROTO_VERSION_UNSPECIFIED;
5155 cpi->transport = XPORT_UNSPECIFIED;
5156 cpi->transport_version = XPORT_VERSION_UNSPECIFIED;
5157 cpi->ccb_h.status = CAM_REQ_CMP;
5162 work_ccb->ccb_h.status = CAM_REQ_INVALID;
5169 * The xpt as a "controller" has no interrupt sources, so polling
5173 xptpoll(struct cam_sim *sim)
5178 xpt_lock_buses(void)
5180 mtx_lock(&xsoftc.xpt_topo_lock);
5184 xpt_unlock_buses(void)
5186 mtx_unlock(&xsoftc.xpt_topo_lock);
5190 xpt_path_mtx(struct cam_path *path)
5193 return (&path->device->device_mtx);
5197 xpt_done_process(struct ccb_hdr *ccb_h)
5199 struct cam_sim *sim;
5200 struct cam_devq *devq;
5201 struct mtx *mtx = NULL;
5203 if (ccb_h->flags & CAM_HIGH_POWER) {
5204 struct highpowerlist *hphead;
5205 struct cam_ed *device;
5207 mtx_lock(&xsoftc.xpt_highpower_lock);
5208 hphead = &xsoftc.highpowerq;
5210 device = STAILQ_FIRST(hphead);
5213 * Increment the count since this command is done.
5215 xsoftc.num_highpower++;
5218 * Any high powered commands queued up?
5220 if (device != NULL) {
5222 STAILQ_REMOVE_HEAD(hphead, highpowerq_entry);
5223 mtx_unlock(&xsoftc.xpt_highpower_lock);
5225 mtx_lock(&device->sim->devq->send_mtx);
5226 xpt_release_devq_device(device,
5227 /*count*/1, /*runqueue*/TRUE);
5228 mtx_unlock(&device->sim->devq->send_mtx);
5230 mtx_unlock(&xsoftc.xpt_highpower_lock);
5233 sim = ccb_h->path->bus->sim;
5235 if (ccb_h->status & CAM_RELEASE_SIMQ) {
5236 xpt_release_simq(sim, /*run_queue*/FALSE);
5237 ccb_h->status &= ~CAM_RELEASE_SIMQ;
5240 if ((ccb_h->flags & CAM_DEV_QFRZDIS)
5241 && (ccb_h->status & CAM_DEV_QFRZN)) {
5242 xpt_release_devq(ccb_h->path, /*count*/1, /*run_queue*/TRUE);
5243 ccb_h->status &= ~CAM_DEV_QFRZN;
5247 if ((ccb_h->func_code & XPT_FC_USER_CCB) == 0) {
5248 struct cam_ed *dev = ccb_h->path->device;
5250 mtx_lock(&devq->send_mtx);
5251 devq->send_active--;
5252 devq->send_openings++;
5253 cam_ccbq_ccb_done(&dev->ccbq, (union ccb *)ccb_h);
5255 if (((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0
5256 && (dev->ccbq.dev_active == 0))) {
5257 dev->flags &= ~CAM_DEV_REL_ON_QUEUE_EMPTY;
5258 xpt_release_devq_device(dev, /*count*/1,
5259 /*run_queue*/FALSE);
5262 if (((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0
5263 && (ccb_h->status&CAM_STATUS_MASK) != CAM_REQUEUE_REQ)) {
5264 dev->flags &= ~CAM_DEV_REL_ON_COMPLETE;
5265 xpt_release_devq_device(dev, /*count*/1,
5266 /*run_queue*/FALSE);
5269 if (!device_is_queued(dev))
5270 (void)xpt_schedule_devq(devq, dev);
5272 mtx_unlock(&devq->send_mtx);
5274 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0) {
5275 mtx = xpt_path_mtx(ccb_h->path);
5278 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
5279 && (--dev->tag_delay_count == 0))
5280 xpt_start_tags(ccb_h->path);
5284 if ((ccb_h->flags & CAM_UNLOCKED) == 0) {
5286 mtx = xpt_path_mtx(ccb_h->path);
5296 /* Call the peripheral driver's callback */
5297 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX;
5298 (*ccb_h->cbfcnp)(ccb_h->path->periph, (union ccb *)ccb_h);
5304 xpt_done_td(void *arg)
5306 struct cam_doneq *queue = arg;
5307 struct ccb_hdr *ccb_h;
5308 STAILQ_HEAD(, ccb_hdr) doneq;
5310 STAILQ_INIT(&doneq);
5311 mtx_lock(&queue->cam_doneq_mtx);
5313 while (STAILQ_EMPTY(&queue->cam_doneq)) {
5314 queue->cam_doneq_sleep = 1;
5315 msleep(&queue->cam_doneq, &queue->cam_doneq_mtx,
5317 queue->cam_doneq_sleep = 0;
5319 STAILQ_CONCAT(&doneq, &queue->cam_doneq);
5320 mtx_unlock(&queue->cam_doneq_mtx);
5322 THREAD_NO_SLEEPING();
5323 while ((ccb_h = STAILQ_FIRST(&doneq)) != NULL) {
5324 STAILQ_REMOVE_HEAD(&doneq, sim_links.stqe);
5325 xpt_done_process(ccb_h);
5327 THREAD_SLEEPING_OK();
5329 mtx_lock(&queue->cam_doneq_mtx);
5334 camisr_runqueue(void)
5336 struct ccb_hdr *ccb_h;
5337 struct cam_doneq *queue;
5340 /* Process global queues. */
5341 for (i = 0; i < cam_num_doneqs; i++) {
5342 queue = &cam_doneqs[i];
5343 mtx_lock(&queue->cam_doneq_mtx);
5344 while ((ccb_h = STAILQ_FIRST(&queue->cam_doneq)) != NULL) {
5345 STAILQ_REMOVE_HEAD(&queue->cam_doneq, sim_links.stqe);
5346 mtx_unlock(&queue->cam_doneq_mtx);
5347 xpt_done_process(ccb_h);
5348 mtx_lock(&queue->cam_doneq_mtx);
5350 mtx_unlock(&queue->cam_doneq_mtx);