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 "opt_printf.h"
32 #include <sys/cdefs.h>
33 __FBSDID("$FreeBSD$");
35 #include <sys/param.h>
38 #include <sys/systm.h>
39 #include <sys/types.h>
40 #include <sys/malloc.h>
41 #include <sys/kernel.h>
44 #include <sys/fcntl.h>
45 #include <sys/interrupt.h>
49 #include <sys/taskqueue.h>
52 #include <sys/mutex.h>
53 #include <sys/sysctl.h>
54 #include <sys/kthread.h>
57 #include <cam/cam_ccb.h>
58 #include <cam/cam_periph.h>
59 #include <cam/cam_queue.h>
60 #include <cam/cam_sim.h>
61 #include <cam/cam_xpt.h>
62 #include <cam/cam_xpt_sim.h>
63 #include <cam/cam_xpt_periph.h>
64 #include <cam/cam_xpt_internal.h>
65 #include <cam/cam_debug.h>
66 #include <cam/cam_compat.h>
68 #include <cam/scsi/scsi_all.h>
69 #include <cam/scsi/scsi_message.h>
70 #include <cam/scsi/scsi_pass.h>
72 #include <machine/md_var.h> /* geometry translation */
73 #include <machine/stdarg.h> /* for xpt_print below */
77 /* Wild guess based on not wanting to grow the stack too much */
78 #define XPT_PRINT_MAXLEN 512
79 #ifdef PRINTF_BUFR_SIZE
80 #define XPT_PRINT_LEN PRINTF_BUFR_SIZE
82 #define XPT_PRINT_LEN 128
84 _Static_assert(XPT_PRINT_LEN <= XPT_PRINT_MAXLEN, "XPT_PRINT_LEN is too large");
87 * This is the maximum number of high powered commands (e.g. start unit)
88 * that can be outstanding at a particular time.
90 #ifndef CAM_MAX_HIGHPOWER
91 #define CAM_MAX_HIGHPOWER 4
94 /* Datastructures internal to the xpt layer */
95 MALLOC_DEFINE(M_CAMXPT, "CAM XPT", "CAM XPT buffers");
96 MALLOC_DEFINE(M_CAMDEV, "CAM DEV", "CAM devices");
97 MALLOC_DEFINE(M_CAMCCB, "CAM CCB", "CAM CCBs");
98 MALLOC_DEFINE(M_CAMPATH, "CAM path", "CAM paths");
100 /* Object for defering XPT actions to a taskqueue */
108 uint32_t xpt_generation;
110 /* number of high powered commands that can go through right now */
111 struct mtx xpt_highpower_lock;
112 STAILQ_HEAD(highpowerlist, cam_ed) highpowerq;
115 /* queue for handling async rescan requests. */
116 TAILQ_HEAD(, ccb_hdr) ccb_scanq;
118 int buses_config_done;
124 * N.B., "busses" is an archaic spelling of "buses". In new code
125 * "buses" is preferred.
127 TAILQ_HEAD(,cam_eb) xpt_busses;
128 u_int bus_generation;
130 struct intr_config_hook *xpt_config_hook;
133 struct callout boot_callout;
135 struct mtx xpt_topo_lock;
137 struct taskqueue *xpt_taskq;
142 DM_RET_FLAG_MASK = 0x0f,
145 DM_RET_DESCEND = 0x20,
147 DM_RET_ACTION_MASK = 0xf0
155 } xpt_traverse_depth;
157 struct xpt_traverse_config {
158 xpt_traverse_depth depth;
163 typedef int xpt_busfunc_t (struct cam_eb *bus, void *arg);
164 typedef int xpt_targetfunc_t (struct cam_et *target, void *arg);
165 typedef int xpt_devicefunc_t (struct cam_ed *device, void *arg);
166 typedef int xpt_periphfunc_t (struct cam_periph *periph, void *arg);
167 typedef int xpt_pdrvfunc_t (struct periph_driver **pdrv, void *arg);
169 /* Transport layer configuration information */
170 static struct xpt_softc xsoftc;
172 MTX_SYSINIT(xpt_topo_init, &xsoftc.xpt_topo_lock, "XPT topology lock", MTX_DEF);
174 SYSCTL_INT(_kern_cam, OID_AUTO, boot_delay, CTLFLAG_RDTUN,
175 &xsoftc.boot_delay, 0, "Bus registration wait time");
176 SYSCTL_UINT(_kern_cam, OID_AUTO, xpt_generation, CTLFLAG_RD,
177 &xsoftc.xpt_generation, 0, "CAM peripheral generation count");
178 SYSCTL_INT(_kern_cam, OID_AUTO, announce_nosbuf, CTLFLAG_RWTUN,
179 &xsoftc.announce_nosbuf, 0, "Don't use sbuf for announcements");
182 struct mtx_padalign cam_doneq_mtx;
183 STAILQ_HEAD(, ccb_hdr) cam_doneq;
187 static struct cam_doneq cam_doneqs[MAXCPU];
188 static int cam_num_doneqs;
189 static struct proc *cam_proc;
191 SYSCTL_INT(_kern_cam, OID_AUTO, num_doneqs, CTLFLAG_RDTUN,
192 &cam_num_doneqs, 0, "Number of completion queues/threads");
194 struct cam_periph *xpt_periph;
196 static periph_init_t xpt_periph_init;
198 static struct periph_driver xpt_driver =
200 xpt_periph_init, "xpt",
201 TAILQ_HEAD_INITIALIZER(xpt_driver.units), /* generation */ 0,
205 PERIPHDRIVER_DECLARE(xpt, xpt_driver);
207 static d_open_t xptopen;
208 static d_close_t xptclose;
209 static d_ioctl_t xptioctl;
210 static d_ioctl_t xptdoioctl;
212 static struct cdevsw xpt_cdevsw = {
213 .d_version = D_VERSION,
221 /* Storage for debugging datastructures */
222 struct cam_path *cam_dpath;
223 u_int32_t cam_dflags = CAM_DEBUG_FLAGS;
224 SYSCTL_UINT(_kern_cam, OID_AUTO, dflags, CTLFLAG_RWTUN,
225 &cam_dflags, 0, "Enabled debug flags");
226 u_int32_t cam_debug_delay = CAM_DEBUG_DELAY;
227 SYSCTL_UINT(_kern_cam, OID_AUTO, debug_delay, CTLFLAG_RWTUN,
228 &cam_debug_delay, 0, "Delay in us after each debug message");
230 /* Our boot-time initialization hook */
231 static int cam_module_event_handler(module_t, int /*modeventtype_t*/, void *);
233 static moduledata_t cam_moduledata = {
235 cam_module_event_handler,
239 static int xpt_init(void *);
241 DECLARE_MODULE(cam, cam_moduledata, SI_SUB_CONFIGURE, SI_ORDER_SECOND);
242 MODULE_VERSION(cam, 1);
245 static void xpt_async_bcast(struct async_list *async_head,
246 u_int32_t async_code,
247 struct cam_path *path,
249 static path_id_t xptnextfreepathid(void);
250 static path_id_t xptpathid(const char *sim_name, int sim_unit, int sim_bus);
251 static union ccb *xpt_get_ccb(struct cam_periph *periph);
252 static union ccb *xpt_get_ccb_nowait(struct cam_periph *periph);
253 static void xpt_run_allocq(struct cam_periph *periph, int sleep);
254 static void xpt_run_allocq_task(void *context, int pending);
255 static void xpt_run_devq(struct cam_devq *devq);
256 static timeout_t xpt_release_devq_timeout;
257 static void xpt_release_simq_timeout(void *arg) __unused;
258 static void xpt_acquire_bus(struct cam_eb *bus);
259 static void xpt_release_bus(struct cam_eb *bus);
260 static uint32_t xpt_freeze_devq_device(struct cam_ed *dev, u_int count);
261 static int xpt_release_devq_device(struct cam_ed *dev, u_int count,
263 static struct cam_et*
264 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id);
265 static void xpt_acquire_target(struct cam_et *target);
266 static void xpt_release_target(struct cam_et *target);
267 static struct cam_eb*
268 xpt_find_bus(path_id_t path_id);
269 static struct cam_et*
270 xpt_find_target(struct cam_eb *bus, target_id_t target_id);
271 static struct cam_ed*
272 xpt_find_device(struct cam_et *target, lun_id_t lun_id);
273 static void xpt_config(void *arg);
274 static int xpt_schedule_dev(struct camq *queue, cam_pinfo *dev_pinfo,
275 u_int32_t new_priority);
276 static xpt_devicefunc_t xptpassannouncefunc;
277 static void xptaction(struct cam_sim *sim, union ccb *work_ccb);
278 static void xptpoll(struct cam_sim *sim);
279 static void camisr_runqueue(void);
280 static void xpt_done_process(struct ccb_hdr *ccb_h);
281 static void xpt_done_td(void *);
282 static dev_match_ret xptbusmatch(struct dev_match_pattern *patterns,
283 u_int num_patterns, struct cam_eb *bus);
284 static dev_match_ret xptdevicematch(struct dev_match_pattern *patterns,
286 struct cam_ed *device);
287 static dev_match_ret xptperiphmatch(struct dev_match_pattern *patterns,
289 struct cam_periph *periph);
290 static xpt_busfunc_t xptedtbusfunc;
291 static xpt_targetfunc_t xptedttargetfunc;
292 static xpt_devicefunc_t xptedtdevicefunc;
293 static xpt_periphfunc_t xptedtperiphfunc;
294 static xpt_pdrvfunc_t xptplistpdrvfunc;
295 static xpt_periphfunc_t xptplistperiphfunc;
296 static int xptedtmatch(struct ccb_dev_match *cdm);
297 static int xptperiphlistmatch(struct ccb_dev_match *cdm);
298 static int xptbustraverse(struct cam_eb *start_bus,
299 xpt_busfunc_t *tr_func, void *arg);
300 static int xpttargettraverse(struct cam_eb *bus,
301 struct cam_et *start_target,
302 xpt_targetfunc_t *tr_func, void *arg);
303 static int xptdevicetraverse(struct cam_et *target,
304 struct cam_ed *start_device,
305 xpt_devicefunc_t *tr_func, void *arg);
306 static int xptperiphtraverse(struct cam_ed *device,
307 struct cam_periph *start_periph,
308 xpt_periphfunc_t *tr_func, void *arg);
309 static int xptpdrvtraverse(struct periph_driver **start_pdrv,
310 xpt_pdrvfunc_t *tr_func, void *arg);
311 static int xptpdperiphtraverse(struct periph_driver **pdrv,
312 struct cam_periph *start_periph,
313 xpt_periphfunc_t *tr_func,
315 static xpt_busfunc_t xptdefbusfunc;
316 static xpt_targetfunc_t xptdeftargetfunc;
317 static xpt_devicefunc_t xptdefdevicefunc;
318 static xpt_periphfunc_t xptdefperiphfunc;
319 static void xpt_finishconfig_task(void *context, int pending);
320 static void xpt_dev_async_default(u_int32_t async_code,
322 struct cam_et *target,
323 struct cam_ed *device,
325 static struct cam_ed * xpt_alloc_device_default(struct cam_eb *bus,
326 struct cam_et *target,
328 static xpt_devicefunc_t xptsetasyncfunc;
329 static xpt_busfunc_t xptsetasyncbusfunc;
330 static cam_status xptregister(struct cam_periph *periph,
332 static const char * xpt_action_name(uint32_t action);
333 static __inline int device_is_queued(struct cam_ed *device);
336 xpt_schedule_devq(struct cam_devq *devq, struct cam_ed *dev)
340 mtx_assert(&devq->send_mtx, MA_OWNED);
341 if ((dev->ccbq.queue.entries > 0) &&
342 (dev->ccbq.dev_openings > 0) &&
343 (dev->ccbq.queue.qfrozen_cnt == 0)) {
345 * The priority of a device waiting for controller
346 * resources is that of the highest priority CCB
350 xpt_schedule_dev(&devq->send_queue,
352 CAMQ_GET_PRIO(&dev->ccbq.queue));
360 device_is_queued(struct cam_ed *device)
362 return (device->devq_entry.index != CAM_UNQUEUED_INDEX);
368 make_dev(&xpt_cdevsw, 0, UID_ROOT, GID_OPERATOR, 0600, "xpt0");
372 xptopen(struct cdev *dev, int flags, int fmt, struct thread *td)
376 * Only allow read-write access.
378 if (((flags & FWRITE) == 0) || ((flags & FREAD) == 0))
382 * We don't allow nonblocking access.
384 if ((flags & O_NONBLOCK) != 0) {
385 printf("%s: can't do nonblocking access\n", devtoname(dev));
393 xptclose(struct cdev *dev, int flag, int fmt, struct thread *td)
400 * Don't automatically grab the xpt softc lock here even though this is going
401 * through the xpt device. The xpt device is really just a back door for
402 * accessing other devices and SIMs, so the right thing to do is to grab
403 * the appropriate SIM lock once the bus/SIM is located.
406 xptioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
410 if ((error = xptdoioctl(dev, cmd, addr, flag, td)) == ENOTTY) {
411 error = cam_compat_ioctl(dev, cmd, addr, flag, td, xptdoioctl);
417 xptdoioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
425 * For the transport layer CAMIOCOMMAND ioctl, we really only want
426 * to accept CCB types that don't quite make sense to send through a
427 * passthrough driver. XPT_PATH_INQ is an exception to this, as stated
435 inccb = (union ccb *)addr;
436 #if defined(BUF_TRACKING) || defined(FULL_BUF_TRACKING)
437 if (inccb->ccb_h.func_code == XPT_SCSI_IO)
438 inccb->csio.bio = NULL;
441 if (inccb->ccb_h.flags & CAM_UNLOCKED)
444 bus = xpt_find_bus(inccb->ccb_h.path_id);
448 switch (inccb->ccb_h.func_code) {
451 if (inccb->ccb_h.target_id != CAM_TARGET_WILDCARD ||
452 inccb->ccb_h.target_lun != CAM_LUN_WILDCARD) {
453 xpt_release_bus(bus);
458 if (inccb->ccb_h.target_id == CAM_TARGET_WILDCARD ||
459 inccb->ccb_h.target_lun != CAM_LUN_WILDCARD) {
460 xpt_release_bus(bus);
468 switch(inccb->ccb_h.func_code) {
476 ccb = xpt_alloc_ccb();
479 * Create a path using the bus, target, and lun the
482 if (xpt_create_path(&ccb->ccb_h.path, NULL,
483 inccb->ccb_h.path_id,
484 inccb->ccb_h.target_id,
485 inccb->ccb_h.target_lun) !=
491 /* Ensure all of our fields are correct */
492 xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path,
493 inccb->ccb_h.pinfo.priority);
494 xpt_merge_ccb(ccb, inccb);
495 xpt_path_lock(ccb->ccb_h.path);
496 cam_periph_runccb(ccb, NULL, 0, 0, NULL);
497 xpt_path_unlock(ccb->ccb_h.path);
498 bcopy(ccb, inccb, sizeof(union ccb));
499 xpt_free_path(ccb->ccb_h.path);
507 * This is an immediate CCB, so it's okay to
508 * allocate it on the stack.
512 * Create a path using the bus, target, and lun the
515 if (xpt_create_path(&ccb.ccb_h.path, NULL,
516 inccb->ccb_h.path_id,
517 inccb->ccb_h.target_id,
518 inccb->ccb_h.target_lun) !=
523 /* Ensure all of our fields are correct */
524 xpt_setup_ccb(&ccb.ccb_h, ccb.ccb_h.path,
525 inccb->ccb_h.pinfo.priority);
526 xpt_merge_ccb(&ccb, inccb);
528 bcopy(&ccb, inccb, sizeof(union ccb));
529 xpt_free_path(ccb.ccb_h.path);
533 case XPT_DEV_MATCH: {
534 struct cam_periph_map_info mapinfo;
535 struct cam_path *old_path;
538 * We can't deal with physical addresses for this
539 * type of transaction.
541 if ((inccb->ccb_h.flags & CAM_DATA_MASK) !=
548 * Save this in case the caller had it set to
549 * something in particular.
551 old_path = inccb->ccb_h.path;
554 * We really don't need a path for the matching
555 * code. The path is needed because of the
556 * debugging statements in xpt_action(). They
557 * assume that the CCB has a valid path.
559 inccb->ccb_h.path = xpt_periph->path;
561 bzero(&mapinfo, sizeof(mapinfo));
564 * Map the pattern and match buffers into kernel
565 * virtual address space.
567 error = cam_periph_mapmem(inccb, &mapinfo, MAXPHYS);
570 inccb->ccb_h.path = old_path;
575 * This is an immediate CCB, we can send it on directly.
580 * Map the buffers back into user space.
582 cam_periph_unmapmem(inccb, &mapinfo);
584 inccb->ccb_h.path = old_path;
593 xpt_release_bus(bus);
597 * This is the getpassthru ioctl. It takes a XPT_GDEVLIST ccb as input,
598 * with the periphal driver name and unit name filled in. The other
599 * fields don't really matter as input. The passthrough driver name
600 * ("pass"), and unit number are passed back in the ccb. The current
601 * device generation number, and the index into the device peripheral
602 * driver list, and the status are also passed back. Note that
603 * since we do everything in one pass, unlike the XPT_GDEVLIST ccb,
604 * we never return a status of CAM_GDEVLIST_LIST_CHANGED. It is
605 * (or rather should be) impossible for the device peripheral driver
606 * list to change since we look at the whole thing in one pass, and
607 * we do it with lock protection.
610 case CAMGETPASSTHRU: {
612 struct cam_periph *periph;
613 struct periph_driver **p_drv;
616 int base_periph_found;
618 ccb = (union ccb *)addr;
619 unit = ccb->cgdl.unit_number;
620 name = ccb->cgdl.periph_name;
621 base_periph_found = 0;
622 #if defined(BUF_TRACKING) || defined(FULL_BUF_TRACKING)
623 if (ccb->ccb_h.func_code == XPT_SCSI_IO)
624 ccb->csio.bio = NULL;
628 * Sanity check -- make sure we don't get a null peripheral
631 if (*ccb->cgdl.periph_name == '\0') {
636 /* Keep the list from changing while we traverse it */
639 /* first find our driver in the list of drivers */
640 for (p_drv = periph_drivers; *p_drv != NULL; p_drv++)
641 if (strcmp((*p_drv)->driver_name, name) == 0)
644 if (*p_drv == NULL) {
646 ccb->ccb_h.status = CAM_REQ_CMP_ERR;
647 ccb->cgdl.status = CAM_GDEVLIST_ERROR;
648 *ccb->cgdl.periph_name = '\0';
649 ccb->cgdl.unit_number = 0;
655 * Run through every peripheral instance of this driver
656 * and check to see whether it matches the unit passed
657 * in by the user. If it does, get out of the loops and
658 * find the passthrough driver associated with that
661 for (periph = TAILQ_FIRST(&(*p_drv)->units); periph != NULL;
662 periph = TAILQ_NEXT(periph, unit_links)) {
664 if (periph->unit_number == unit)
668 * If we found the peripheral driver that the user passed
669 * in, go through all of the peripheral drivers for that
670 * particular device and look for a passthrough driver.
672 if (periph != NULL) {
673 struct cam_ed *device;
676 base_periph_found = 1;
677 device = periph->path->device;
678 for (i = 0, periph = SLIST_FIRST(&device->periphs);
680 periph = SLIST_NEXT(periph, periph_links), i++) {
682 * Check to see whether we have a
683 * passthrough device or not.
685 if (strcmp(periph->periph_name, "pass") == 0) {
687 * Fill in the getdevlist fields.
689 strcpy(ccb->cgdl.periph_name,
690 periph->periph_name);
691 ccb->cgdl.unit_number =
693 if (SLIST_NEXT(periph, periph_links))
695 CAM_GDEVLIST_MORE_DEVS;
698 CAM_GDEVLIST_LAST_DEVICE;
699 ccb->cgdl.generation =
703 * Fill in some CCB header fields
704 * that the user may want.
707 periph->path->bus->path_id;
708 ccb->ccb_h.target_id =
709 periph->path->target->target_id;
710 ccb->ccb_h.target_lun =
711 periph->path->device->lun_id;
712 ccb->ccb_h.status = CAM_REQ_CMP;
719 * If the periph is null here, one of two things has
720 * happened. The first possibility is that we couldn't
721 * find the unit number of the particular peripheral driver
722 * that the user is asking about. e.g. the user asks for
723 * the passthrough driver for "da11". We find the list of
724 * "da" peripherals all right, but there is no unit 11.
725 * The other possibility is that we went through the list
726 * of peripheral drivers attached to the device structure,
727 * but didn't find one with the name "pass". Either way,
728 * we return ENOENT, since we couldn't find something.
730 if (periph == NULL) {
731 ccb->ccb_h.status = CAM_REQ_CMP_ERR;
732 ccb->cgdl.status = CAM_GDEVLIST_ERROR;
733 *ccb->cgdl.periph_name = '\0';
734 ccb->cgdl.unit_number = 0;
737 * It is unfortunate that this is even necessary,
738 * but there are many, many clueless users out there.
739 * If this is true, the user is looking for the
740 * passthrough driver, but doesn't have one in his
743 if (base_periph_found == 1) {
744 printf("xptioctl: pass driver is not in the "
746 printf("xptioctl: put \"device pass\" in "
747 "your kernel config file\n");
762 cam_module_event_handler(module_t mod, int what, void *arg)
768 if ((error = xpt_init(NULL)) != 0)
780 static struct xpt_proto *
781 xpt_proto_find(cam_proto proto)
783 struct xpt_proto **pp;
785 SET_FOREACH(pp, cam_xpt_proto_set) {
786 if ((*pp)->proto == proto)
794 xpt_rescan_done(struct cam_periph *periph, union ccb *done_ccb)
797 if (done_ccb->ccb_h.ppriv_ptr1 == NULL) {
798 xpt_free_path(done_ccb->ccb_h.path);
799 xpt_free_ccb(done_ccb);
801 done_ccb->ccb_h.cbfcnp = done_ccb->ccb_h.ppriv_ptr1;
802 (*done_ccb->ccb_h.cbfcnp)(periph, done_ccb);
807 /* thread to handle bus rescans */
809 xpt_scanner_thread(void *dummy)
812 struct cam_path path;
816 if (TAILQ_EMPTY(&xsoftc.ccb_scanq))
817 msleep(&xsoftc.ccb_scanq, &xsoftc.xpt_topo_lock, PRIBIO,
819 if ((ccb = (union ccb *)TAILQ_FIRST(&xsoftc.ccb_scanq)) != NULL) {
820 TAILQ_REMOVE(&xsoftc.ccb_scanq, &ccb->ccb_h, sim_links.tqe);
824 * Since lock can be dropped inside and path freed
825 * by completion callback even before return here,
826 * take our own path copy for reference.
828 xpt_copy_path(&path, ccb->ccb_h.path);
829 xpt_path_lock(&path);
831 xpt_path_unlock(&path);
832 xpt_release_path(&path);
840 xpt_rescan(union ccb *ccb)
844 /* Prepare request */
845 if (ccb->ccb_h.path->target->target_id == CAM_TARGET_WILDCARD &&
846 ccb->ccb_h.path->device->lun_id == CAM_LUN_WILDCARD)
847 ccb->ccb_h.func_code = XPT_SCAN_BUS;
848 else if (ccb->ccb_h.path->target->target_id != CAM_TARGET_WILDCARD &&
849 ccb->ccb_h.path->device->lun_id == CAM_LUN_WILDCARD)
850 ccb->ccb_h.func_code = XPT_SCAN_TGT;
851 else if (ccb->ccb_h.path->target->target_id != CAM_TARGET_WILDCARD &&
852 ccb->ccb_h.path->device->lun_id != CAM_LUN_WILDCARD)
853 ccb->ccb_h.func_code = XPT_SCAN_LUN;
855 xpt_print(ccb->ccb_h.path, "illegal scan path\n");
856 xpt_free_path(ccb->ccb_h.path);
860 CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE,
861 ("xpt_rescan: func %#x %s\n", ccb->ccb_h.func_code,
862 xpt_action_name(ccb->ccb_h.func_code)));
864 ccb->ccb_h.ppriv_ptr1 = ccb->ccb_h.cbfcnp;
865 ccb->ccb_h.cbfcnp = xpt_rescan_done;
866 xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path, CAM_PRIORITY_XPT);
867 /* Don't make duplicate entries for the same paths. */
869 if (ccb->ccb_h.ppriv_ptr1 == NULL) {
870 TAILQ_FOREACH(hdr, &xsoftc.ccb_scanq, sim_links.tqe) {
871 if (xpt_path_comp(hdr->path, ccb->ccb_h.path) == 0) {
872 wakeup(&xsoftc.ccb_scanq);
874 xpt_print(ccb->ccb_h.path, "rescan already queued\n");
875 xpt_free_path(ccb->ccb_h.path);
881 TAILQ_INSERT_TAIL(&xsoftc.ccb_scanq, &ccb->ccb_h, sim_links.tqe);
882 xsoftc.buses_to_config++;
883 wakeup(&xsoftc.ccb_scanq);
887 /* Functions accessed by the peripheral drivers */
889 xpt_init(void *dummy)
891 struct cam_sim *xpt_sim;
892 struct cam_path *path;
893 struct cam_devq *devq;
897 TAILQ_INIT(&xsoftc.xpt_busses);
898 TAILQ_INIT(&xsoftc.ccb_scanq);
899 STAILQ_INIT(&xsoftc.highpowerq);
900 xsoftc.num_highpower = CAM_MAX_HIGHPOWER;
902 mtx_init(&xsoftc.xpt_lock, "XPT lock", NULL, MTX_DEF);
903 mtx_init(&xsoftc.xpt_highpower_lock, "XPT highpower lock", NULL, MTX_DEF);
904 xsoftc.xpt_taskq = taskqueue_create("CAM XPT task", M_WAITOK,
905 taskqueue_thread_enqueue, /*context*/&xsoftc.xpt_taskq);
907 #ifdef CAM_BOOT_DELAY
909 * Override this value at compile time to assist our users
910 * who don't use loader to boot a kernel.
912 xsoftc.boot_delay = CAM_BOOT_DELAY;
915 * The xpt layer is, itself, the equivalent of a SIM.
916 * Allow 16 ccbs in the ccb pool for it. This should
917 * give decent parallelism when we probe buses and
918 * perform other XPT functions.
920 devq = cam_simq_alloc(16);
921 xpt_sim = cam_sim_alloc(xptaction,
926 /*mtx*/&xsoftc.xpt_lock,
927 /*max_dev_transactions*/0,
928 /*max_tagged_dev_transactions*/0,
933 mtx_lock(&xsoftc.xpt_lock);
934 if ((status = xpt_bus_register(xpt_sim, NULL, 0)) != CAM_SUCCESS) {
935 mtx_unlock(&xsoftc.xpt_lock);
936 printf("xpt_init: xpt_bus_register failed with status %#x,"
937 " failing attach\n", status);
940 mtx_unlock(&xsoftc.xpt_lock);
943 * Looking at the XPT from the SIM layer, the XPT is
944 * the equivalent of a peripheral driver. Allocate
945 * a peripheral driver entry for us.
947 if ((status = xpt_create_path(&path, NULL, CAM_XPT_PATH_ID,
949 CAM_LUN_WILDCARD)) != CAM_REQ_CMP) {
950 printf("xpt_init: xpt_create_path failed with status %#x,"
951 " failing attach\n", status);
955 cam_periph_alloc(xptregister, NULL, NULL, NULL, "xpt", CAM_PERIPH_BIO,
956 path, NULL, 0, xpt_sim);
957 xpt_path_unlock(path);
960 if (cam_num_doneqs < 1)
961 cam_num_doneqs = 1 + mp_ncpus / 6;
962 else if (cam_num_doneqs > MAXCPU)
963 cam_num_doneqs = MAXCPU;
964 for (i = 0; i < cam_num_doneqs; i++) {
965 mtx_init(&cam_doneqs[i].cam_doneq_mtx, "CAM doneq", NULL,
967 STAILQ_INIT(&cam_doneqs[i].cam_doneq);
968 error = kproc_kthread_add(xpt_done_td, &cam_doneqs[i],
969 &cam_proc, NULL, 0, 0, "cam", "doneq%d", i);
975 if (cam_num_doneqs < 1) {
976 printf("xpt_init: Cannot init completion queues "
977 "- failing attach\n");
981 * Register a callback for when interrupts are enabled.
983 xsoftc.xpt_config_hook =
984 (struct intr_config_hook *)malloc(sizeof(struct intr_config_hook),
985 M_CAMXPT, M_NOWAIT | M_ZERO);
986 if (xsoftc.xpt_config_hook == NULL) {
987 printf("xpt_init: Cannot malloc config hook "
988 "- failing attach\n");
991 xsoftc.xpt_config_hook->ich_func = xpt_config;
992 if (config_intrhook_establish(xsoftc.xpt_config_hook) != 0) {
993 free (xsoftc.xpt_config_hook, M_CAMXPT);
994 printf("xpt_init: config_intrhook_establish failed "
995 "- failing attach\n");
1002 xptregister(struct cam_periph *periph, void *arg)
1004 struct cam_sim *xpt_sim;
1006 if (periph == NULL) {
1007 printf("xptregister: periph was NULL!!\n");
1008 return(CAM_REQ_CMP_ERR);
1011 xpt_sim = (struct cam_sim *)arg;
1012 xpt_sim->softc = periph;
1013 xpt_periph = periph;
1014 periph->softc = NULL;
1016 return(CAM_REQ_CMP);
1020 xpt_add_periph(struct cam_periph *periph)
1022 struct cam_ed *device;
1025 TASK_INIT(&periph->periph_run_task, 0, xpt_run_allocq_task, periph);
1026 device = periph->path->device;
1027 status = CAM_REQ_CMP;
1028 if (device != NULL) {
1029 mtx_lock(&device->target->bus->eb_mtx);
1030 device->generation++;
1031 SLIST_INSERT_HEAD(&device->periphs, periph, periph_links);
1032 mtx_unlock(&device->target->bus->eb_mtx);
1033 atomic_add_32(&xsoftc.xpt_generation, 1);
1040 xpt_remove_periph(struct cam_periph *periph)
1042 struct cam_ed *device;
1044 device = periph->path->device;
1045 if (device != NULL) {
1046 mtx_lock(&device->target->bus->eb_mtx);
1047 device->generation++;
1048 SLIST_REMOVE(&device->periphs, periph, cam_periph, periph_links);
1049 mtx_unlock(&device->target->bus->eb_mtx);
1050 atomic_add_32(&xsoftc.xpt_generation, 1);
1056 xpt_announce_periph(struct cam_periph *periph, char *announce_string)
1058 struct cam_path *path = periph->path;
1059 struct xpt_proto *proto;
1061 cam_periph_assert(periph, MA_OWNED);
1062 periph->flags |= CAM_PERIPH_ANNOUNCED;
1064 printf("%s%d at %s%d bus %d scbus%d target %d lun %jx\n",
1065 periph->periph_name, periph->unit_number,
1066 path->bus->sim->sim_name,
1067 path->bus->sim->unit_number,
1068 path->bus->sim->bus_id,
1070 path->target->target_id,
1071 (uintmax_t)path->device->lun_id);
1072 printf("%s%d: ", periph->periph_name, periph->unit_number);
1073 proto = xpt_proto_find(path->device->protocol);
1075 proto->ops->announce(path->device);
1077 printf("%s%d: Unknown protocol device %d\n",
1078 periph->periph_name, periph->unit_number,
1079 path->device->protocol);
1080 if (path->device->serial_num_len > 0) {
1081 /* Don't wrap the screen - print only the first 60 chars */
1082 printf("%s%d: Serial Number %.60s\n", periph->periph_name,
1083 periph->unit_number, path->device->serial_num);
1085 /* Announce transport details. */
1086 path->bus->xport->ops->announce(periph);
1087 /* Announce command queueing. */
1088 if (path->device->inq_flags & SID_CmdQue
1089 || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) {
1090 printf("%s%d: Command Queueing enabled\n",
1091 periph->periph_name, periph->unit_number);
1093 /* Announce caller's details if they've passed in. */
1094 if (announce_string != NULL)
1095 printf("%s%d: %s\n", periph->periph_name,
1096 periph->unit_number, announce_string);
1100 xpt_announce_periph_sbuf(struct cam_periph *periph, struct sbuf *sb,
1101 char *announce_string)
1103 struct cam_path *path = periph->path;
1104 struct xpt_proto *proto;
1106 cam_periph_assert(periph, MA_OWNED);
1107 periph->flags |= CAM_PERIPH_ANNOUNCED;
1109 /* Fall back to the non-sbuf method if necessary */
1110 if (xsoftc.announce_nosbuf != 0) {
1111 xpt_announce_periph(periph, announce_string);
1114 proto = xpt_proto_find(path->device->protocol);
1115 if (((proto != NULL) && (proto->ops->announce_sbuf == NULL)) ||
1116 (path->bus->xport->ops->announce_sbuf == NULL)) {
1117 xpt_announce_periph(periph, announce_string);
1121 sbuf_printf(sb, "%s%d at %s%d bus %d scbus%d target %d lun %jx\n",
1122 periph->periph_name, periph->unit_number,
1123 path->bus->sim->sim_name,
1124 path->bus->sim->unit_number,
1125 path->bus->sim->bus_id,
1127 path->target->target_id,
1128 (uintmax_t)path->device->lun_id);
1129 sbuf_printf(sb, "%s%d: ", periph->periph_name, periph->unit_number);
1132 proto->ops->announce_sbuf(path->device, sb);
1134 sbuf_printf(sb, "%s%d: Unknown protocol device %d\n",
1135 periph->periph_name, periph->unit_number,
1136 path->device->protocol);
1137 if (path->device->serial_num_len > 0) {
1138 /* Don't wrap the screen - print only the first 60 chars */
1139 sbuf_printf(sb, "%s%d: Serial Number %.60s\n",
1140 periph->periph_name, periph->unit_number,
1141 path->device->serial_num);
1143 /* Announce transport details. */
1144 path->bus->xport->ops->announce_sbuf(periph, sb);
1145 /* Announce command queueing. */
1146 if (path->device->inq_flags & SID_CmdQue
1147 || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) {
1148 sbuf_printf(sb, "%s%d: Command Queueing enabled\n",
1149 periph->periph_name, periph->unit_number);
1151 /* Announce caller's details if they've passed in. */
1152 if (announce_string != NULL)
1153 sbuf_printf(sb, "%s%d: %s\n", periph->periph_name,
1154 periph->unit_number, announce_string);
1158 xpt_announce_quirks(struct cam_periph *periph, int quirks, char *bit_string)
1161 printf("%s%d: quirks=0x%b\n", periph->periph_name,
1162 periph->unit_number, quirks, bit_string);
1167 xpt_announce_quirks_sbuf(struct cam_periph *periph, struct sbuf *sb,
1168 int quirks, char *bit_string)
1170 if (xsoftc.announce_nosbuf != 0) {
1171 xpt_announce_quirks(periph, quirks, bit_string);
1176 sbuf_printf(sb, "%s%d: quirks=0x%b\n", periph->periph_name,
1177 periph->unit_number, quirks, bit_string);
1182 xpt_denounce_periph(struct cam_periph *periph)
1184 struct cam_path *path = periph->path;
1185 struct xpt_proto *proto;
1187 cam_periph_assert(periph, MA_OWNED);
1188 printf("%s%d at %s%d bus %d scbus%d target %d lun %jx\n",
1189 periph->periph_name, periph->unit_number,
1190 path->bus->sim->sim_name,
1191 path->bus->sim->unit_number,
1192 path->bus->sim->bus_id,
1194 path->target->target_id,
1195 (uintmax_t)path->device->lun_id);
1196 printf("%s%d: ", periph->periph_name, periph->unit_number);
1197 proto = xpt_proto_find(path->device->protocol);
1199 proto->ops->denounce(path->device);
1201 printf("%s%d: Unknown protocol device %d\n",
1202 periph->periph_name, periph->unit_number,
1203 path->device->protocol);
1204 if (path->device->serial_num_len > 0)
1205 printf(" s/n %.60s", path->device->serial_num);
1206 printf(" detached\n");
1210 xpt_denounce_periph_sbuf(struct cam_periph *periph, struct sbuf *sb)
1212 struct cam_path *path = periph->path;
1213 struct xpt_proto *proto;
1215 cam_periph_assert(periph, MA_OWNED);
1217 /* Fall back to the non-sbuf method if necessary */
1218 if (xsoftc.announce_nosbuf != 0) {
1219 xpt_denounce_periph(periph);
1222 proto = xpt_proto_find(path->device->protocol);
1223 if ((proto != NULL) && (proto->ops->denounce_sbuf == NULL)) {
1224 xpt_denounce_periph(periph);
1228 sbuf_printf(sb, "%s%d at %s%d bus %d scbus%d target %d lun %jx\n",
1229 periph->periph_name, periph->unit_number,
1230 path->bus->sim->sim_name,
1231 path->bus->sim->unit_number,
1232 path->bus->sim->bus_id,
1234 path->target->target_id,
1235 (uintmax_t)path->device->lun_id);
1236 sbuf_printf(sb, "%s%d: ", periph->periph_name, periph->unit_number);
1239 proto->ops->denounce_sbuf(path->device, sb);
1241 sbuf_printf(sb, "%s%d: Unknown protocol device %d\n",
1242 periph->periph_name, periph->unit_number,
1243 path->device->protocol);
1244 if (path->device->serial_num_len > 0)
1245 sbuf_printf(sb, " s/n %.60s", path->device->serial_num);
1246 sbuf_printf(sb, " detached\n");
1250 xpt_getattr(char *buf, size_t len, const char *attr, struct cam_path *path)
1253 struct ccb_dev_advinfo cdai;
1254 struct scsi_vpd_id_descriptor *idd;
1256 xpt_path_assert(path, MA_OWNED);
1258 memset(&cdai, 0, sizeof(cdai));
1259 xpt_setup_ccb(&cdai.ccb_h, path, CAM_PRIORITY_NORMAL);
1260 cdai.ccb_h.func_code = XPT_DEV_ADVINFO;
1261 cdai.flags = CDAI_FLAG_NONE;
1264 if (!strcmp(attr, "GEOM::ident"))
1265 cdai.buftype = CDAI_TYPE_SERIAL_NUM;
1266 else if (!strcmp(attr, "GEOM::physpath"))
1267 cdai.buftype = CDAI_TYPE_PHYS_PATH;
1268 else if (strcmp(attr, "GEOM::lunid") == 0 ||
1269 strcmp(attr, "GEOM::lunname") == 0) {
1270 cdai.buftype = CDAI_TYPE_SCSI_DEVID;
1271 cdai.bufsiz = CAM_SCSI_DEVID_MAXLEN;
1275 cdai.buf = malloc(cdai.bufsiz, M_CAMXPT, M_NOWAIT|M_ZERO);
1276 if (cdai.buf == NULL) {
1280 xpt_action((union ccb *)&cdai); /* can only be synchronous */
1281 if ((cdai.ccb_h.status & CAM_DEV_QFRZN) != 0)
1282 cam_release_devq(cdai.ccb_h.path, 0, 0, 0, FALSE);
1283 if (cdai.provsiz == 0)
1285 if (cdai.buftype == CDAI_TYPE_SCSI_DEVID) {
1286 if (strcmp(attr, "GEOM::lunid") == 0) {
1287 idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf,
1288 cdai.provsiz, scsi_devid_is_lun_naa);
1290 idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf,
1291 cdai.provsiz, scsi_devid_is_lun_eui64);
1293 idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf,
1294 cdai.provsiz, scsi_devid_is_lun_uuid);
1296 idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf,
1297 cdai.provsiz, scsi_devid_is_lun_md5);
1301 idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf,
1302 cdai.provsiz, scsi_devid_is_lun_t10);
1304 idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf,
1305 cdai.provsiz, scsi_devid_is_lun_name);
1309 if ((idd->proto_codeset & SVPD_ID_CODESET_MASK) == SVPD_ID_CODESET_ASCII) {
1310 if (idd->length < len) {
1311 for (l = 0; l < idd->length; l++)
1312 buf[l] = idd->identifier[l] ?
1313 idd->identifier[l] : ' ';
1317 } else if ((idd->proto_codeset & SVPD_ID_CODESET_MASK) == SVPD_ID_CODESET_UTF8) {
1318 l = strnlen(idd->identifier, idd->length);
1320 bcopy(idd->identifier, buf, l);
1324 } else if ((idd->id_type & SVPD_ID_TYPE_MASK) == SVPD_ID_TYPE_UUID
1325 && idd->identifier[0] == 0x10) {
1326 if ((idd->length - 2) * 2 + 4 < len) {
1327 for (l = 2, o = 0; l < idd->length; l++) {
1328 if (l == 6 || l == 8 || l == 10 || l == 12)
1329 o += sprintf(buf + o, "-");
1330 o += sprintf(buf + o, "%02x",
1331 idd->identifier[l]);
1336 if (idd->length * 2 < len) {
1337 for (l = 0; l < idd->length; l++)
1338 sprintf(buf + l * 2, "%02x",
1339 idd->identifier[l]);
1345 if (strlcpy(buf, cdai.buf, len) >= len)
1350 if (cdai.buf != NULL)
1351 free(cdai.buf, M_CAMXPT);
1355 static dev_match_ret
1356 xptbusmatch(struct dev_match_pattern *patterns, u_int num_patterns,
1359 dev_match_ret retval;
1362 retval = DM_RET_NONE;
1365 * If we aren't given something to match against, that's an error.
1368 return(DM_RET_ERROR);
1371 * If there are no match entries, then this bus matches no
1374 if ((patterns == NULL) || (num_patterns == 0))
1375 return(DM_RET_DESCEND | DM_RET_COPY);
1377 for (i = 0; i < num_patterns; i++) {
1378 struct bus_match_pattern *cur_pattern;
1381 * If the pattern in question isn't for a bus node, we
1382 * aren't interested. However, we do indicate to the
1383 * calling routine that we should continue descending the
1384 * tree, since the user wants to match against lower-level
1387 if (patterns[i].type != DEV_MATCH_BUS) {
1388 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1389 retval |= DM_RET_DESCEND;
1393 cur_pattern = &patterns[i].pattern.bus_pattern;
1396 * If they want to match any bus node, we give them any
1399 if (cur_pattern->flags == BUS_MATCH_ANY) {
1400 /* set the copy flag */
1401 retval |= DM_RET_COPY;
1404 * If we've already decided on an action, go ahead
1407 if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE)
1412 * Not sure why someone would do this...
1414 if (cur_pattern->flags == BUS_MATCH_NONE)
1417 if (((cur_pattern->flags & BUS_MATCH_PATH) != 0)
1418 && (cur_pattern->path_id != bus->path_id))
1421 if (((cur_pattern->flags & BUS_MATCH_BUS_ID) != 0)
1422 && (cur_pattern->bus_id != bus->sim->bus_id))
1425 if (((cur_pattern->flags & BUS_MATCH_UNIT) != 0)
1426 && (cur_pattern->unit_number != bus->sim->unit_number))
1429 if (((cur_pattern->flags & BUS_MATCH_NAME) != 0)
1430 && (strncmp(cur_pattern->dev_name, bus->sim->sim_name,
1435 * If we get to this point, the user definitely wants
1436 * information on this bus. So tell the caller to copy the
1439 retval |= DM_RET_COPY;
1442 * If the return action has been set to descend, then we
1443 * know that we've already seen a non-bus matching
1444 * expression, therefore we need to further descend the tree.
1445 * This won't change by continuing around the loop, so we
1446 * go ahead and return. If we haven't seen a non-bus
1447 * matching expression, we keep going around the loop until
1448 * we exhaust the matching expressions. We'll set the stop
1449 * flag once we fall out of the loop.
1451 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND)
1456 * If the return action hasn't been set to descend yet, that means
1457 * we haven't seen anything other than bus matching patterns. So
1458 * tell the caller to stop descending the tree -- the user doesn't
1459 * want to match against lower level tree elements.
1461 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1462 retval |= DM_RET_STOP;
1467 static dev_match_ret
1468 xptdevicematch(struct dev_match_pattern *patterns, u_int num_patterns,
1469 struct cam_ed *device)
1471 dev_match_ret retval;
1474 retval = DM_RET_NONE;
1477 * If we aren't given something to match against, that's an error.
1480 return(DM_RET_ERROR);
1483 * If there are no match entries, then this device matches no
1486 if ((patterns == NULL) || (num_patterns == 0))
1487 return(DM_RET_DESCEND | DM_RET_COPY);
1489 for (i = 0; i < num_patterns; i++) {
1490 struct device_match_pattern *cur_pattern;
1491 struct scsi_vpd_device_id *device_id_page;
1494 * If the pattern in question isn't for a device node, we
1495 * aren't interested.
1497 if (patterns[i].type != DEV_MATCH_DEVICE) {
1498 if ((patterns[i].type == DEV_MATCH_PERIPH)
1499 && ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE))
1500 retval |= DM_RET_DESCEND;
1504 cur_pattern = &patterns[i].pattern.device_pattern;
1506 /* Error out if mutually exclusive options are specified. */
1507 if ((cur_pattern->flags & (DEV_MATCH_INQUIRY|DEV_MATCH_DEVID))
1508 == (DEV_MATCH_INQUIRY|DEV_MATCH_DEVID))
1509 return(DM_RET_ERROR);
1512 * If they want to match any device node, we give them any
1515 if (cur_pattern->flags == DEV_MATCH_ANY)
1519 * Not sure why someone would do this...
1521 if (cur_pattern->flags == DEV_MATCH_NONE)
1524 if (((cur_pattern->flags & DEV_MATCH_PATH) != 0)
1525 && (cur_pattern->path_id != device->target->bus->path_id))
1528 if (((cur_pattern->flags & DEV_MATCH_TARGET) != 0)
1529 && (cur_pattern->target_id != device->target->target_id))
1532 if (((cur_pattern->flags & DEV_MATCH_LUN) != 0)
1533 && (cur_pattern->target_lun != device->lun_id))
1536 if (((cur_pattern->flags & DEV_MATCH_INQUIRY) != 0)
1537 && (cam_quirkmatch((caddr_t)&device->inq_data,
1538 (caddr_t)&cur_pattern->data.inq_pat,
1539 1, sizeof(cur_pattern->data.inq_pat),
1540 scsi_static_inquiry_match) == NULL))
1543 device_id_page = (struct scsi_vpd_device_id *)device->device_id;
1544 if (((cur_pattern->flags & DEV_MATCH_DEVID) != 0)
1545 && (device->device_id_len < SVPD_DEVICE_ID_HDR_LEN
1546 || scsi_devid_match((uint8_t *)device_id_page->desc_list,
1547 device->device_id_len
1548 - SVPD_DEVICE_ID_HDR_LEN,
1549 cur_pattern->data.devid_pat.id,
1550 cur_pattern->data.devid_pat.id_len) != 0))
1555 * If we get to this point, the user definitely wants
1556 * information on this device. So tell the caller to copy
1559 retval |= DM_RET_COPY;
1562 * If the return action has been set to descend, then we
1563 * know that we've already seen a peripheral matching
1564 * expression, therefore we need to further descend the tree.
1565 * This won't change by continuing around the loop, so we
1566 * go ahead and return. If we haven't seen a peripheral
1567 * matching expression, we keep going around the loop until
1568 * we exhaust the matching expressions. We'll set the stop
1569 * flag once we fall out of the loop.
1571 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND)
1576 * If the return action hasn't been set to descend yet, that means
1577 * we haven't seen any peripheral matching patterns. So tell the
1578 * caller to stop descending the tree -- the user doesn't want to
1579 * match against lower level tree elements.
1581 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1582 retval |= DM_RET_STOP;
1588 * Match a single peripheral against any number of match patterns.
1590 static dev_match_ret
1591 xptperiphmatch(struct dev_match_pattern *patterns, u_int num_patterns,
1592 struct cam_periph *periph)
1594 dev_match_ret retval;
1598 * If we aren't given something to match against, that's an error.
1601 return(DM_RET_ERROR);
1604 * If there are no match entries, then this peripheral matches no
1607 if ((patterns == NULL) || (num_patterns == 0))
1608 return(DM_RET_STOP | DM_RET_COPY);
1611 * There aren't any nodes below a peripheral node, so there's no
1612 * reason to descend the tree any further.
1614 retval = DM_RET_STOP;
1616 for (i = 0; i < num_patterns; i++) {
1617 struct periph_match_pattern *cur_pattern;
1620 * If the pattern in question isn't for a peripheral, we
1621 * aren't interested.
1623 if (patterns[i].type != DEV_MATCH_PERIPH)
1626 cur_pattern = &patterns[i].pattern.periph_pattern;
1629 * If they want to match on anything, then we will do so.
1631 if (cur_pattern->flags == PERIPH_MATCH_ANY) {
1632 /* set the copy flag */
1633 retval |= DM_RET_COPY;
1636 * We've already set the return action to stop,
1637 * since there are no nodes below peripherals in
1644 * Not sure why someone would do this...
1646 if (cur_pattern->flags == PERIPH_MATCH_NONE)
1649 if (((cur_pattern->flags & PERIPH_MATCH_PATH) != 0)
1650 && (cur_pattern->path_id != periph->path->bus->path_id))
1654 * For the target and lun id's, we have to make sure the
1655 * target and lun pointers aren't NULL. The xpt peripheral
1656 * has a wildcard target and device.
1658 if (((cur_pattern->flags & PERIPH_MATCH_TARGET) != 0)
1659 && ((periph->path->target == NULL)
1660 ||(cur_pattern->target_id != periph->path->target->target_id)))
1663 if (((cur_pattern->flags & PERIPH_MATCH_LUN) != 0)
1664 && ((periph->path->device == NULL)
1665 || (cur_pattern->target_lun != periph->path->device->lun_id)))
1668 if (((cur_pattern->flags & PERIPH_MATCH_UNIT) != 0)
1669 && (cur_pattern->unit_number != periph->unit_number))
1672 if (((cur_pattern->flags & PERIPH_MATCH_NAME) != 0)
1673 && (strncmp(cur_pattern->periph_name, periph->periph_name,
1678 * If we get to this point, the user definitely wants
1679 * information on this peripheral. So tell the caller to
1680 * copy the data out.
1682 retval |= DM_RET_COPY;
1685 * The return action has already been set to stop, since
1686 * peripherals don't have any nodes below them in the EDT.
1692 * If we get to this point, the peripheral that was passed in
1693 * doesn't match any of the patterns.
1699 xptedtbusfunc(struct cam_eb *bus, void *arg)
1701 struct ccb_dev_match *cdm;
1702 struct cam_et *target;
1703 dev_match_ret retval;
1705 cdm = (struct ccb_dev_match *)arg;
1708 * If our position is for something deeper in the tree, that means
1709 * that we've already seen this node. So, we keep going down.
1711 if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1712 && (cdm->pos.cookie.bus == bus)
1713 && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1714 && (cdm->pos.cookie.target != NULL))
1715 retval = DM_RET_DESCEND;
1717 retval = xptbusmatch(cdm->patterns, cdm->num_patterns, bus);
1720 * If we got an error, bail out of the search.
1722 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1723 cdm->status = CAM_DEV_MATCH_ERROR;
1728 * If the copy flag is set, copy this bus out.
1730 if (retval & DM_RET_COPY) {
1733 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1734 sizeof(struct dev_match_result));
1737 * If we don't have enough space to put in another
1738 * match result, save our position and tell the
1739 * user there are more devices to check.
1741 if (spaceleft < sizeof(struct dev_match_result)) {
1742 bzero(&cdm->pos, sizeof(cdm->pos));
1743 cdm->pos.position_type =
1744 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS;
1746 cdm->pos.cookie.bus = bus;
1747 cdm->pos.generations[CAM_BUS_GENERATION]=
1748 xsoftc.bus_generation;
1749 cdm->status = CAM_DEV_MATCH_MORE;
1752 j = cdm->num_matches;
1754 cdm->matches[j].type = DEV_MATCH_BUS;
1755 cdm->matches[j].result.bus_result.path_id = bus->path_id;
1756 cdm->matches[j].result.bus_result.bus_id = bus->sim->bus_id;
1757 cdm->matches[j].result.bus_result.unit_number =
1758 bus->sim->unit_number;
1759 strncpy(cdm->matches[j].result.bus_result.dev_name,
1760 bus->sim->sim_name, DEV_IDLEN);
1764 * If the user is only interested in buses, there's no
1765 * reason to descend to the next level in the tree.
1767 if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP)
1771 * If there is a target generation recorded, check it to
1772 * make sure the target list hasn't changed.
1774 mtx_lock(&bus->eb_mtx);
1775 if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1776 && (cdm->pos.cookie.bus == bus)
1777 && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1778 && (cdm->pos.cookie.target != NULL)) {
1779 if ((cdm->pos.generations[CAM_TARGET_GENERATION] !=
1781 mtx_unlock(&bus->eb_mtx);
1782 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1785 target = (struct cam_et *)cdm->pos.cookie.target;
1789 mtx_unlock(&bus->eb_mtx);
1791 return (xpttargettraverse(bus, target, xptedttargetfunc, arg));
1795 xptedttargetfunc(struct cam_et *target, void *arg)
1797 struct ccb_dev_match *cdm;
1799 struct cam_ed *device;
1801 cdm = (struct ccb_dev_match *)arg;
1805 * If there is a device list generation recorded, check it to
1806 * make sure the device list hasn't changed.
1808 mtx_lock(&bus->eb_mtx);
1809 if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1810 && (cdm->pos.cookie.bus == bus)
1811 && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1812 && (cdm->pos.cookie.target == target)
1813 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1814 && (cdm->pos.cookie.device != NULL)) {
1815 if (cdm->pos.generations[CAM_DEV_GENERATION] !=
1816 target->generation) {
1817 mtx_unlock(&bus->eb_mtx);
1818 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1821 device = (struct cam_ed *)cdm->pos.cookie.device;
1825 mtx_unlock(&bus->eb_mtx);
1827 return (xptdevicetraverse(target, device, xptedtdevicefunc, arg));
1831 xptedtdevicefunc(struct cam_ed *device, void *arg)
1834 struct cam_periph *periph;
1835 struct ccb_dev_match *cdm;
1836 dev_match_ret retval;
1838 cdm = (struct ccb_dev_match *)arg;
1839 bus = device->target->bus;
1842 * If our position is for something deeper in the tree, that means
1843 * that we've already seen this node. So, we keep going down.
1845 if ((cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1846 && (cdm->pos.cookie.device == device)
1847 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
1848 && (cdm->pos.cookie.periph != NULL))
1849 retval = DM_RET_DESCEND;
1851 retval = xptdevicematch(cdm->patterns, cdm->num_patterns,
1854 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1855 cdm->status = CAM_DEV_MATCH_ERROR;
1860 * If the copy flag is set, copy this device out.
1862 if (retval & DM_RET_COPY) {
1865 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1866 sizeof(struct dev_match_result));
1869 * If we don't have enough space to put in another
1870 * match result, save our position and tell the
1871 * user there are more devices to check.
1873 if (spaceleft < sizeof(struct dev_match_result)) {
1874 bzero(&cdm->pos, sizeof(cdm->pos));
1875 cdm->pos.position_type =
1876 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS |
1877 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE;
1879 cdm->pos.cookie.bus = device->target->bus;
1880 cdm->pos.generations[CAM_BUS_GENERATION]=
1881 xsoftc.bus_generation;
1882 cdm->pos.cookie.target = device->target;
1883 cdm->pos.generations[CAM_TARGET_GENERATION] =
1884 device->target->bus->generation;
1885 cdm->pos.cookie.device = device;
1886 cdm->pos.generations[CAM_DEV_GENERATION] =
1887 device->target->generation;
1888 cdm->status = CAM_DEV_MATCH_MORE;
1891 j = cdm->num_matches;
1893 cdm->matches[j].type = DEV_MATCH_DEVICE;
1894 cdm->matches[j].result.device_result.path_id =
1895 device->target->bus->path_id;
1896 cdm->matches[j].result.device_result.target_id =
1897 device->target->target_id;
1898 cdm->matches[j].result.device_result.target_lun =
1900 cdm->matches[j].result.device_result.protocol =
1902 bcopy(&device->inq_data,
1903 &cdm->matches[j].result.device_result.inq_data,
1904 sizeof(struct scsi_inquiry_data));
1905 bcopy(&device->ident_data,
1906 &cdm->matches[j].result.device_result.ident_data,
1907 sizeof(struct ata_params));
1909 /* Let the user know whether this device is unconfigured */
1910 if (device->flags & CAM_DEV_UNCONFIGURED)
1911 cdm->matches[j].result.device_result.flags =
1912 DEV_RESULT_UNCONFIGURED;
1914 cdm->matches[j].result.device_result.flags =
1919 * If the user isn't interested in peripherals, don't descend
1920 * the tree any further.
1922 if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP)
1926 * If there is a peripheral list generation recorded, make sure
1927 * it hasn't changed.
1930 mtx_lock(&bus->eb_mtx);
1931 if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1932 && (cdm->pos.cookie.bus == bus)
1933 && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1934 && (cdm->pos.cookie.target == device->target)
1935 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1936 && (cdm->pos.cookie.device == device)
1937 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
1938 && (cdm->pos.cookie.periph != NULL)) {
1939 if (cdm->pos.generations[CAM_PERIPH_GENERATION] !=
1940 device->generation) {
1941 mtx_unlock(&bus->eb_mtx);
1943 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1946 periph = (struct cam_periph *)cdm->pos.cookie.periph;
1950 mtx_unlock(&bus->eb_mtx);
1953 return (xptperiphtraverse(device, periph, xptedtperiphfunc, arg));
1957 xptedtperiphfunc(struct cam_periph *periph, void *arg)
1959 struct ccb_dev_match *cdm;
1960 dev_match_ret retval;
1962 cdm = (struct ccb_dev_match *)arg;
1964 retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph);
1966 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1967 cdm->status = CAM_DEV_MATCH_ERROR;
1972 * If the copy flag is set, copy this peripheral out.
1974 if (retval & DM_RET_COPY) {
1977 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1978 sizeof(struct dev_match_result));
1981 * If we don't have enough space to put in another
1982 * match result, save our position and tell the
1983 * user there are more devices to check.
1985 if (spaceleft < sizeof(struct dev_match_result)) {
1986 bzero(&cdm->pos, sizeof(cdm->pos));
1987 cdm->pos.position_type =
1988 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS |
1989 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE |
1992 cdm->pos.cookie.bus = periph->path->bus;
1993 cdm->pos.generations[CAM_BUS_GENERATION]=
1994 xsoftc.bus_generation;
1995 cdm->pos.cookie.target = periph->path->target;
1996 cdm->pos.generations[CAM_TARGET_GENERATION] =
1997 periph->path->bus->generation;
1998 cdm->pos.cookie.device = periph->path->device;
1999 cdm->pos.generations[CAM_DEV_GENERATION] =
2000 periph->path->target->generation;
2001 cdm->pos.cookie.periph = periph;
2002 cdm->pos.generations[CAM_PERIPH_GENERATION] =
2003 periph->path->device->generation;
2004 cdm->status = CAM_DEV_MATCH_MORE;
2008 j = cdm->num_matches;
2010 cdm->matches[j].type = DEV_MATCH_PERIPH;
2011 cdm->matches[j].result.periph_result.path_id =
2012 periph->path->bus->path_id;
2013 cdm->matches[j].result.periph_result.target_id =
2014 periph->path->target->target_id;
2015 cdm->matches[j].result.periph_result.target_lun =
2016 periph->path->device->lun_id;
2017 cdm->matches[j].result.periph_result.unit_number =
2018 periph->unit_number;
2019 strncpy(cdm->matches[j].result.periph_result.periph_name,
2020 periph->periph_name, DEV_IDLEN);
2027 xptedtmatch(struct ccb_dev_match *cdm)
2032 cdm->num_matches = 0;
2035 * Check the bus list generation. If it has changed, the user
2036 * needs to reset everything and start over.
2039 if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2040 && (cdm->pos.cookie.bus != NULL)) {
2041 if (cdm->pos.generations[CAM_BUS_GENERATION] !=
2042 xsoftc.bus_generation) {
2044 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
2047 bus = (struct cam_eb *)cdm->pos.cookie.bus;
2053 ret = xptbustraverse(bus, xptedtbusfunc, cdm);
2056 * If we get back 0, that means that we had to stop before fully
2057 * traversing the EDT. It also means that one of the subroutines
2058 * has set the status field to the proper value. If we get back 1,
2059 * we've fully traversed the EDT and copied out any matching entries.
2062 cdm->status = CAM_DEV_MATCH_LAST;
2068 xptplistpdrvfunc(struct periph_driver **pdrv, void *arg)
2070 struct cam_periph *periph;
2071 struct ccb_dev_match *cdm;
2073 cdm = (struct ccb_dev_match *)arg;
2076 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
2077 && (cdm->pos.cookie.pdrv == pdrv)
2078 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
2079 && (cdm->pos.cookie.periph != NULL)) {
2080 if (cdm->pos.generations[CAM_PERIPH_GENERATION] !=
2081 (*pdrv)->generation) {
2083 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
2086 periph = (struct cam_periph *)cdm->pos.cookie.periph;
2092 return (xptpdperiphtraverse(pdrv, periph, xptplistperiphfunc, arg));
2096 xptplistperiphfunc(struct cam_periph *periph, void *arg)
2098 struct ccb_dev_match *cdm;
2099 dev_match_ret retval;
2101 cdm = (struct ccb_dev_match *)arg;
2103 retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph);
2105 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
2106 cdm->status = CAM_DEV_MATCH_ERROR;
2111 * If the copy flag is set, copy this peripheral out.
2113 if (retval & DM_RET_COPY) {
2116 spaceleft = cdm->match_buf_len - (cdm->num_matches *
2117 sizeof(struct dev_match_result));
2120 * If we don't have enough space to put in another
2121 * match result, save our position and tell the
2122 * user there are more devices to check.
2124 if (spaceleft < sizeof(struct dev_match_result)) {
2125 struct periph_driver **pdrv;
2128 bzero(&cdm->pos, sizeof(cdm->pos));
2129 cdm->pos.position_type =
2130 CAM_DEV_POS_PDRV | CAM_DEV_POS_PDPTR |
2134 * This may look a bit non-sensical, but it is
2135 * actually quite logical. There are very few
2136 * peripheral drivers, and bloating every peripheral
2137 * structure with a pointer back to its parent
2138 * peripheral driver linker set entry would cost
2139 * more in the long run than doing this quick lookup.
2141 for (pdrv = periph_drivers; *pdrv != NULL; pdrv++) {
2142 if (strcmp((*pdrv)->driver_name,
2143 periph->periph_name) == 0)
2147 if (*pdrv == NULL) {
2148 cdm->status = CAM_DEV_MATCH_ERROR;
2152 cdm->pos.cookie.pdrv = pdrv;
2154 * The periph generation slot does double duty, as
2155 * does the periph pointer slot. They are used for
2156 * both edt and pdrv lookups and positioning.
2158 cdm->pos.cookie.periph = periph;
2159 cdm->pos.generations[CAM_PERIPH_GENERATION] =
2160 (*pdrv)->generation;
2161 cdm->status = CAM_DEV_MATCH_MORE;
2165 j = cdm->num_matches;
2167 cdm->matches[j].type = DEV_MATCH_PERIPH;
2168 cdm->matches[j].result.periph_result.path_id =
2169 periph->path->bus->path_id;
2172 * The transport layer peripheral doesn't have a target or
2175 if (periph->path->target)
2176 cdm->matches[j].result.periph_result.target_id =
2177 periph->path->target->target_id;
2179 cdm->matches[j].result.periph_result.target_id =
2180 CAM_TARGET_WILDCARD;
2182 if (periph->path->device)
2183 cdm->matches[j].result.periph_result.target_lun =
2184 periph->path->device->lun_id;
2186 cdm->matches[j].result.periph_result.target_lun =
2189 cdm->matches[j].result.periph_result.unit_number =
2190 periph->unit_number;
2191 strncpy(cdm->matches[j].result.periph_result.periph_name,
2192 periph->periph_name, DEV_IDLEN);
2199 xptperiphlistmatch(struct ccb_dev_match *cdm)
2203 cdm->num_matches = 0;
2206 * At this point in the edt traversal function, we check the bus
2207 * list generation to make sure that no buses have been added or
2208 * removed since the user last sent a XPT_DEV_MATCH ccb through.
2209 * For the peripheral driver list traversal function, however, we
2210 * don't have to worry about new peripheral driver types coming or
2211 * going; they're in a linker set, and therefore can't change
2212 * without a recompile.
2215 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
2216 && (cdm->pos.cookie.pdrv != NULL))
2217 ret = xptpdrvtraverse(
2218 (struct periph_driver **)cdm->pos.cookie.pdrv,
2219 xptplistpdrvfunc, cdm);
2221 ret = xptpdrvtraverse(NULL, xptplistpdrvfunc, cdm);
2224 * If we get back 0, that means that we had to stop before fully
2225 * traversing the peripheral driver tree. It also means that one of
2226 * the subroutines has set the status field to the proper value. If
2227 * we get back 1, we've fully traversed the EDT and copied out any
2231 cdm->status = CAM_DEV_MATCH_LAST;
2237 xptbustraverse(struct cam_eb *start_bus, xpt_busfunc_t *tr_func, void *arg)
2239 struct cam_eb *bus, *next_bus;
2247 bus = TAILQ_FIRST(&xsoftc.xpt_busses);
2255 for (; bus != NULL; bus = next_bus) {
2256 retval = tr_func(bus, arg);
2258 xpt_release_bus(bus);
2262 next_bus = TAILQ_NEXT(bus, links);
2264 next_bus->refcount++;
2266 xpt_release_bus(bus);
2272 xpttargettraverse(struct cam_eb *bus, struct cam_et *start_target,
2273 xpt_targetfunc_t *tr_func, void *arg)
2275 struct cam_et *target, *next_target;
2280 target = start_target;
2282 mtx_lock(&bus->eb_mtx);
2283 target = TAILQ_FIRST(&bus->et_entries);
2284 if (target == NULL) {
2285 mtx_unlock(&bus->eb_mtx);
2289 mtx_unlock(&bus->eb_mtx);
2291 for (; target != NULL; target = next_target) {
2292 retval = tr_func(target, arg);
2294 xpt_release_target(target);
2297 mtx_lock(&bus->eb_mtx);
2298 next_target = TAILQ_NEXT(target, links);
2300 next_target->refcount++;
2301 mtx_unlock(&bus->eb_mtx);
2302 xpt_release_target(target);
2308 xptdevicetraverse(struct cam_et *target, struct cam_ed *start_device,
2309 xpt_devicefunc_t *tr_func, void *arg)
2312 struct cam_ed *device, *next_device;
2318 device = start_device;
2320 mtx_lock(&bus->eb_mtx);
2321 device = TAILQ_FIRST(&target->ed_entries);
2322 if (device == NULL) {
2323 mtx_unlock(&bus->eb_mtx);
2327 mtx_unlock(&bus->eb_mtx);
2329 for (; device != NULL; device = next_device) {
2330 mtx_lock(&device->device_mtx);
2331 retval = tr_func(device, arg);
2332 mtx_unlock(&device->device_mtx);
2334 xpt_release_device(device);
2337 mtx_lock(&bus->eb_mtx);
2338 next_device = TAILQ_NEXT(device, links);
2340 next_device->refcount++;
2341 mtx_unlock(&bus->eb_mtx);
2342 xpt_release_device(device);
2348 xptperiphtraverse(struct cam_ed *device, struct cam_periph *start_periph,
2349 xpt_periphfunc_t *tr_func, void *arg)
2352 struct cam_periph *periph, *next_periph;
2357 bus = device->target->bus;
2359 periph = start_periph;
2362 mtx_lock(&bus->eb_mtx);
2363 periph = SLIST_FIRST(&device->periphs);
2364 while (periph != NULL && (periph->flags & CAM_PERIPH_FREE) != 0)
2365 periph = SLIST_NEXT(periph, periph_links);
2366 if (periph == NULL) {
2367 mtx_unlock(&bus->eb_mtx);
2372 mtx_unlock(&bus->eb_mtx);
2375 for (; periph != NULL; periph = next_periph) {
2376 retval = tr_func(periph, arg);
2378 cam_periph_release_locked(periph);
2382 mtx_lock(&bus->eb_mtx);
2383 next_periph = SLIST_NEXT(periph, periph_links);
2384 while (next_periph != NULL &&
2385 (next_periph->flags & CAM_PERIPH_FREE) != 0)
2386 next_periph = SLIST_NEXT(next_periph, periph_links);
2388 next_periph->refcount++;
2389 mtx_unlock(&bus->eb_mtx);
2391 cam_periph_release_locked(periph);
2397 xptpdrvtraverse(struct periph_driver **start_pdrv,
2398 xpt_pdrvfunc_t *tr_func, void *arg)
2400 struct periph_driver **pdrv;
2406 * We don't traverse the peripheral driver list like we do the
2407 * other lists, because it is a linker set, and therefore cannot be
2408 * changed during runtime. If the peripheral driver list is ever
2409 * re-done to be something other than a linker set (i.e. it can
2410 * change while the system is running), the list traversal should
2411 * be modified to work like the other traversal functions.
2413 for (pdrv = (start_pdrv ? start_pdrv : periph_drivers);
2414 *pdrv != NULL; pdrv++) {
2415 retval = tr_func(pdrv, arg);
2425 xptpdperiphtraverse(struct periph_driver **pdrv,
2426 struct cam_periph *start_periph,
2427 xpt_periphfunc_t *tr_func, void *arg)
2429 struct cam_periph *periph, *next_periph;
2435 periph = start_periph;
2438 periph = TAILQ_FIRST(&(*pdrv)->units);
2439 while (periph != NULL && (periph->flags & CAM_PERIPH_FREE) != 0)
2440 periph = TAILQ_NEXT(periph, unit_links);
2441 if (periph == NULL) {
2448 for (; periph != NULL; periph = next_periph) {
2449 cam_periph_lock(periph);
2450 retval = tr_func(periph, arg);
2451 cam_periph_unlock(periph);
2453 cam_periph_release(periph);
2457 next_periph = TAILQ_NEXT(periph, unit_links);
2458 while (next_periph != NULL &&
2459 (next_periph->flags & CAM_PERIPH_FREE) != 0)
2460 next_periph = TAILQ_NEXT(next_periph, unit_links);
2462 next_periph->refcount++;
2464 cam_periph_release(periph);
2470 xptdefbusfunc(struct cam_eb *bus, void *arg)
2472 struct xpt_traverse_config *tr_config;
2474 tr_config = (struct xpt_traverse_config *)arg;
2476 if (tr_config->depth == XPT_DEPTH_BUS) {
2477 xpt_busfunc_t *tr_func;
2479 tr_func = (xpt_busfunc_t *)tr_config->tr_func;
2481 return(tr_func(bus, tr_config->tr_arg));
2483 return(xpttargettraverse(bus, NULL, xptdeftargetfunc, arg));
2487 xptdeftargetfunc(struct cam_et *target, void *arg)
2489 struct xpt_traverse_config *tr_config;
2491 tr_config = (struct xpt_traverse_config *)arg;
2493 if (tr_config->depth == XPT_DEPTH_TARGET) {
2494 xpt_targetfunc_t *tr_func;
2496 tr_func = (xpt_targetfunc_t *)tr_config->tr_func;
2498 return(tr_func(target, tr_config->tr_arg));
2500 return(xptdevicetraverse(target, NULL, xptdefdevicefunc, arg));
2504 xptdefdevicefunc(struct cam_ed *device, void *arg)
2506 struct xpt_traverse_config *tr_config;
2508 tr_config = (struct xpt_traverse_config *)arg;
2510 if (tr_config->depth == XPT_DEPTH_DEVICE) {
2511 xpt_devicefunc_t *tr_func;
2513 tr_func = (xpt_devicefunc_t *)tr_config->tr_func;
2515 return(tr_func(device, tr_config->tr_arg));
2517 return(xptperiphtraverse(device, NULL, xptdefperiphfunc, arg));
2521 xptdefperiphfunc(struct cam_periph *periph, void *arg)
2523 struct xpt_traverse_config *tr_config;
2524 xpt_periphfunc_t *tr_func;
2526 tr_config = (struct xpt_traverse_config *)arg;
2528 tr_func = (xpt_periphfunc_t *)tr_config->tr_func;
2531 * Unlike the other default functions, we don't check for depth
2532 * here. The peripheral driver level is the last level in the EDT,
2533 * so if we're here, we should execute the function in question.
2535 return(tr_func(periph, tr_config->tr_arg));
2539 * Execute the given function for every bus in the EDT.
2542 xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg)
2544 struct xpt_traverse_config tr_config;
2546 tr_config.depth = XPT_DEPTH_BUS;
2547 tr_config.tr_func = tr_func;
2548 tr_config.tr_arg = arg;
2550 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2554 * Execute the given function for every device in the EDT.
2557 xpt_for_all_devices(xpt_devicefunc_t *tr_func, void *arg)
2559 struct xpt_traverse_config tr_config;
2561 tr_config.depth = XPT_DEPTH_DEVICE;
2562 tr_config.tr_func = tr_func;
2563 tr_config.tr_arg = arg;
2565 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2569 xptsetasyncfunc(struct cam_ed *device, void *arg)
2571 struct cam_path path;
2572 struct ccb_getdev cgd;
2573 struct ccb_setasync *csa = (struct ccb_setasync *)arg;
2576 * Don't report unconfigured devices (Wildcard devs,
2577 * devices only for target mode, device instances
2578 * that have been invalidated but are waiting for
2579 * their last reference count to be released).
2581 if ((device->flags & CAM_DEV_UNCONFIGURED) != 0)
2584 xpt_compile_path(&path,
2586 device->target->bus->path_id,
2587 device->target->target_id,
2589 xpt_setup_ccb(&cgd.ccb_h, &path, CAM_PRIORITY_NORMAL);
2590 cgd.ccb_h.func_code = XPT_GDEV_TYPE;
2591 xpt_action((union ccb *)&cgd);
2592 csa->callback(csa->callback_arg,
2595 xpt_release_path(&path);
2601 xptsetasyncbusfunc(struct cam_eb *bus, void *arg)
2603 struct cam_path path;
2604 struct ccb_pathinq cpi;
2605 struct ccb_setasync *csa = (struct ccb_setasync *)arg;
2607 xpt_compile_path(&path, /*periph*/NULL,
2609 CAM_TARGET_WILDCARD,
2611 xpt_path_lock(&path);
2612 xpt_setup_ccb(&cpi.ccb_h, &path, CAM_PRIORITY_NORMAL);
2613 cpi.ccb_h.func_code = XPT_PATH_INQ;
2614 xpt_action((union ccb *)&cpi);
2615 csa->callback(csa->callback_arg,
2618 xpt_path_unlock(&path);
2619 xpt_release_path(&path);
2625 xpt_action(union ccb *start_ccb)
2628 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE,
2629 ("xpt_action: func %#x %s\n", start_ccb->ccb_h.func_code,
2630 xpt_action_name(start_ccb->ccb_h.func_code)));
2632 start_ccb->ccb_h.status = CAM_REQ_INPROG;
2633 (*(start_ccb->ccb_h.path->bus->xport->ops->action))(start_ccb);
2637 xpt_action_default(union ccb *start_ccb)
2639 struct cam_path *path;
2640 struct cam_sim *sim;
2643 path = start_ccb->ccb_h.path;
2644 CAM_DEBUG(path, CAM_DEBUG_TRACE,
2645 ("xpt_action_default: func %#x %s\n", start_ccb->ccb_h.func_code,
2646 xpt_action_name(start_ccb->ccb_h.func_code)));
2648 switch (start_ccb->ccb_h.func_code) {
2651 struct cam_ed *device;
2654 * For the sake of compatibility with SCSI-1
2655 * devices that may not understand the identify
2656 * message, we include lun information in the
2657 * second byte of all commands. SCSI-1 specifies
2658 * that luns are a 3 bit value and reserves only 3
2659 * bits for lun information in the CDB. Later
2660 * revisions of the SCSI spec allow for more than 8
2661 * luns, but have deprecated lun information in the
2662 * CDB. So, if the lun won't fit, we must omit.
2664 * Also be aware that during initial probing for devices,
2665 * the inquiry information is unknown but initialized to 0.
2666 * This means that this code will be exercised while probing
2667 * devices with an ANSI revision greater than 2.
2669 device = path->device;
2670 if (device->protocol_version <= SCSI_REV_2
2671 && start_ccb->ccb_h.target_lun < 8
2672 && (start_ccb->ccb_h.flags & CAM_CDB_POINTER) == 0) {
2674 start_ccb->csio.cdb_io.cdb_bytes[1] |=
2675 start_ccb->ccb_h.target_lun << 5;
2677 start_ccb->csio.scsi_status = SCSI_STATUS_OK;
2681 case XPT_CONT_TARGET_IO:
2682 start_ccb->csio.sense_resid = 0;
2683 start_ccb->csio.resid = 0;
2686 if (start_ccb->ccb_h.func_code == XPT_ATA_IO)
2687 start_ccb->ataio.resid = 0;
2690 if (start_ccb->ccb_h.func_code == XPT_NVME_IO)
2691 start_ccb->nvmeio.resid = 0;
2697 struct cam_devq *devq;
2699 devq = path->bus->sim->devq;
2700 mtx_lock(&devq->send_mtx);
2701 cam_ccbq_insert_ccb(&path->device->ccbq, start_ccb);
2702 if (xpt_schedule_devq(devq, path->device) != 0)
2704 mtx_unlock(&devq->send_mtx);
2707 case XPT_CALC_GEOMETRY:
2708 /* Filter out garbage */
2709 if (start_ccb->ccg.block_size == 0
2710 || start_ccb->ccg.volume_size == 0) {
2711 start_ccb->ccg.cylinders = 0;
2712 start_ccb->ccg.heads = 0;
2713 start_ccb->ccg.secs_per_track = 0;
2714 start_ccb->ccb_h.status = CAM_REQ_CMP;
2717 #if defined(__sparc64__)
2719 * For sparc64, we may need adjust the geometry of large
2720 * disks in order to fit the limitations of the 16-bit
2721 * fields of the VTOC8 disk label.
2723 if (scsi_da_bios_params(&start_ccb->ccg) != 0) {
2724 start_ccb->ccb_h.status = CAM_REQ_CMP;
2731 union ccb* abort_ccb;
2733 abort_ccb = start_ccb->cab.abort_ccb;
2734 if (XPT_FC_IS_DEV_QUEUED(abort_ccb)) {
2735 struct cam_ed *device;
2736 struct cam_devq *devq;
2738 device = abort_ccb->ccb_h.path->device;
2739 devq = device->sim->devq;
2741 mtx_lock(&devq->send_mtx);
2742 if (abort_ccb->ccb_h.pinfo.index > 0) {
2743 cam_ccbq_remove_ccb(&device->ccbq, abort_ccb);
2744 abort_ccb->ccb_h.status =
2745 CAM_REQ_ABORTED|CAM_DEV_QFRZN;
2746 xpt_freeze_devq_device(device, 1);
2747 mtx_unlock(&devq->send_mtx);
2748 xpt_done(abort_ccb);
2749 start_ccb->ccb_h.status = CAM_REQ_CMP;
2752 mtx_unlock(&devq->send_mtx);
2754 if (abort_ccb->ccb_h.pinfo.index == CAM_UNQUEUED_INDEX
2755 && (abort_ccb->ccb_h.status & CAM_SIM_QUEUED) == 0) {
2757 * We've caught this ccb en route to
2758 * the SIM. Flag it for abort and the
2759 * SIM will do so just before starting
2760 * real work on the CCB.
2762 abort_ccb->ccb_h.status =
2763 CAM_REQ_ABORTED|CAM_DEV_QFRZN;
2764 xpt_freeze_devq(abort_ccb->ccb_h.path, 1);
2765 start_ccb->ccb_h.status = CAM_REQ_CMP;
2769 if (XPT_FC_IS_QUEUED(abort_ccb)
2770 && (abort_ccb->ccb_h.pinfo.index == CAM_DONEQ_INDEX)) {
2772 * It's already completed but waiting
2773 * for our SWI to get to it.
2775 start_ccb->ccb_h.status = CAM_UA_ABORT;
2779 * If we weren't able to take care of the abort request
2780 * in the XPT, pass the request down to the SIM for processing.
2784 case XPT_ACCEPT_TARGET_IO:
2786 case XPT_IMMED_NOTIFY:
2787 case XPT_NOTIFY_ACK:
2789 case XPT_IMMEDIATE_NOTIFY:
2790 case XPT_NOTIFY_ACKNOWLEDGE:
2791 case XPT_GET_SIM_KNOB_OLD:
2792 case XPT_GET_SIM_KNOB:
2793 case XPT_SET_SIM_KNOB:
2794 case XPT_GET_TRAN_SETTINGS:
2795 case XPT_SET_TRAN_SETTINGS:
2798 sim = path->bus->sim;
2800 if (mtx && !mtx_owned(mtx))
2804 CAM_DEBUG(path, CAM_DEBUG_TRACE,
2805 ("sim->sim_action: func=%#x\n", start_ccb->ccb_h.func_code));
2806 (*(sim->sim_action))(sim, start_ccb);
2807 CAM_DEBUG(path, CAM_DEBUG_TRACE,
2808 ("sim->sim_action: status=%#x\n", start_ccb->ccb_h.status));
2812 case XPT_PATH_STATS:
2813 start_ccb->cpis.last_reset = path->bus->last_reset;
2814 start_ccb->ccb_h.status = CAM_REQ_CMP;
2821 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) {
2822 start_ccb->ccb_h.status = CAM_DEV_NOT_THERE;
2824 struct ccb_getdev *cgd;
2826 cgd = &start_ccb->cgd;
2827 cgd->protocol = dev->protocol;
2828 cgd->inq_data = dev->inq_data;
2829 cgd->ident_data = dev->ident_data;
2830 cgd->inq_flags = dev->inq_flags;
2831 cgd->nvme_data = dev->nvme_data;
2832 cgd->nvme_cdata = dev->nvme_cdata;
2833 cgd->ccb_h.status = CAM_REQ_CMP;
2834 cgd->serial_num_len = dev->serial_num_len;
2835 if ((dev->serial_num_len > 0)
2836 && (dev->serial_num != NULL))
2837 bcopy(dev->serial_num, cgd->serial_num,
2838 dev->serial_num_len);
2842 case XPT_GDEV_STATS:
2844 struct ccb_getdevstats *cgds = &start_ccb->cgds;
2845 struct cam_ed *dev = path->device;
2846 struct cam_eb *bus = path->bus;
2847 struct cam_et *tar = path->target;
2848 struct cam_devq *devq = bus->sim->devq;
2850 mtx_lock(&devq->send_mtx);
2851 cgds->dev_openings = dev->ccbq.dev_openings;
2852 cgds->dev_active = dev->ccbq.dev_active;
2853 cgds->allocated = dev->ccbq.allocated;
2854 cgds->queued = cam_ccbq_pending_ccb_count(&dev->ccbq);
2855 cgds->held = cgds->allocated - cgds->dev_active - cgds->queued;
2856 cgds->last_reset = tar->last_reset;
2857 cgds->maxtags = dev->maxtags;
2858 cgds->mintags = dev->mintags;
2859 if (timevalcmp(&tar->last_reset, &bus->last_reset, <))
2860 cgds->last_reset = bus->last_reset;
2861 mtx_unlock(&devq->send_mtx);
2862 cgds->ccb_h.status = CAM_REQ_CMP;
2867 struct cam_periph *nperiph;
2868 struct periph_list *periph_head;
2869 struct ccb_getdevlist *cgdl;
2871 struct cam_ed *device;
2878 * Don't want anyone mucking with our data.
2880 device = path->device;
2881 periph_head = &device->periphs;
2882 cgdl = &start_ccb->cgdl;
2885 * Check and see if the list has changed since the user
2886 * last requested a list member. If so, tell them that the
2887 * list has changed, and therefore they need to start over
2888 * from the beginning.
2890 if ((cgdl->index != 0) &&
2891 (cgdl->generation != device->generation)) {
2892 cgdl->status = CAM_GDEVLIST_LIST_CHANGED;
2897 * Traverse the list of peripherals and attempt to find
2898 * the requested peripheral.
2900 for (nperiph = SLIST_FIRST(periph_head), i = 0;
2901 (nperiph != NULL) && (i <= cgdl->index);
2902 nperiph = SLIST_NEXT(nperiph, periph_links), i++) {
2903 if (i == cgdl->index) {
2904 strncpy(cgdl->periph_name,
2905 nperiph->periph_name,
2907 cgdl->unit_number = nperiph->unit_number;
2912 cgdl->status = CAM_GDEVLIST_ERROR;
2916 if (nperiph == NULL)
2917 cgdl->status = CAM_GDEVLIST_LAST_DEVICE;
2919 cgdl->status = CAM_GDEVLIST_MORE_DEVS;
2922 cgdl->generation = device->generation;
2924 cgdl->ccb_h.status = CAM_REQ_CMP;
2929 dev_pos_type position_type;
2930 struct ccb_dev_match *cdm;
2932 cdm = &start_ccb->cdm;
2935 * There are two ways of getting at information in the EDT.
2936 * The first way is via the primary EDT tree. It starts
2937 * with a list of buses, then a list of targets on a bus,
2938 * then devices/luns on a target, and then peripherals on a
2939 * device/lun. The "other" way is by the peripheral driver
2940 * lists. The peripheral driver lists are organized by
2941 * peripheral driver. (obviously) So it makes sense to
2942 * use the peripheral driver list if the user is looking
2943 * for something like "da1", or all "da" devices. If the
2944 * user is looking for something on a particular bus/target
2945 * or lun, it's generally better to go through the EDT tree.
2948 if (cdm->pos.position_type != CAM_DEV_POS_NONE)
2949 position_type = cdm->pos.position_type;
2953 position_type = CAM_DEV_POS_NONE;
2955 for (i = 0; i < cdm->num_patterns; i++) {
2956 if ((cdm->patterns[i].type == DEV_MATCH_BUS)
2957 ||(cdm->patterns[i].type == DEV_MATCH_DEVICE)){
2958 position_type = CAM_DEV_POS_EDT;
2963 if (cdm->num_patterns == 0)
2964 position_type = CAM_DEV_POS_EDT;
2965 else if (position_type == CAM_DEV_POS_NONE)
2966 position_type = CAM_DEV_POS_PDRV;
2969 switch(position_type & CAM_DEV_POS_TYPEMASK) {
2970 case CAM_DEV_POS_EDT:
2973 case CAM_DEV_POS_PDRV:
2974 xptperiphlistmatch(cdm);
2977 cdm->status = CAM_DEV_MATCH_ERROR;
2981 if (cdm->status == CAM_DEV_MATCH_ERROR)
2982 start_ccb->ccb_h.status = CAM_REQ_CMP_ERR;
2984 start_ccb->ccb_h.status = CAM_REQ_CMP;
2990 struct ccb_setasync *csa;
2991 struct async_node *cur_entry;
2992 struct async_list *async_head;
2995 csa = &start_ccb->csa;
2996 added = csa->event_enable;
2997 async_head = &path->device->asyncs;
3000 * If there is already an entry for us, simply
3003 cur_entry = SLIST_FIRST(async_head);
3004 while (cur_entry != NULL) {
3005 if ((cur_entry->callback_arg == csa->callback_arg)
3006 && (cur_entry->callback == csa->callback))
3008 cur_entry = SLIST_NEXT(cur_entry, links);
3011 if (cur_entry != NULL) {
3013 * If the request has no flags set,
3016 added &= ~cur_entry->event_enable;
3017 if (csa->event_enable == 0) {
3018 SLIST_REMOVE(async_head, cur_entry,
3020 xpt_release_device(path->device);
3021 free(cur_entry, M_CAMXPT);
3023 cur_entry->event_enable = csa->event_enable;
3025 csa->event_enable = added;
3027 cur_entry = malloc(sizeof(*cur_entry), M_CAMXPT,
3029 if (cur_entry == NULL) {
3030 csa->ccb_h.status = CAM_RESRC_UNAVAIL;
3033 cur_entry->event_enable = csa->event_enable;
3034 cur_entry->event_lock = (path->bus->sim->mtx &&
3035 mtx_owned(path->bus->sim->mtx)) ? 1 : 0;
3036 cur_entry->callback_arg = csa->callback_arg;
3037 cur_entry->callback = csa->callback;
3038 SLIST_INSERT_HEAD(async_head, cur_entry, links);
3039 xpt_acquire_device(path->device);
3041 start_ccb->ccb_h.status = CAM_REQ_CMP;
3046 struct ccb_relsim *crs;
3049 crs = &start_ccb->crs;
3053 crs->ccb_h.status = CAM_DEV_NOT_THERE;
3057 if ((crs->release_flags & RELSIM_ADJUST_OPENINGS) != 0) {
3059 /* Don't ever go below one opening */
3060 if (crs->openings > 0) {
3061 xpt_dev_ccbq_resize(path, crs->openings);
3064 "number of openings is now %d\n",
3070 mtx_lock(&dev->sim->devq->send_mtx);
3071 if ((crs->release_flags & RELSIM_RELEASE_AFTER_TIMEOUT) != 0) {
3073 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) {
3076 * Just extend the old timeout and decrement
3077 * the freeze count so that a single timeout
3078 * is sufficient for releasing the queue.
3080 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
3081 callout_stop(&dev->callout);
3084 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
3087 callout_reset_sbt(&dev->callout,
3088 SBT_1MS * crs->release_timeout, 0,
3089 xpt_release_devq_timeout, dev, 0);
3091 dev->flags |= CAM_DEV_REL_TIMEOUT_PENDING;
3095 if ((crs->release_flags & RELSIM_RELEASE_AFTER_CMDCMPLT) != 0) {
3097 if ((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0) {
3099 * Decrement the freeze count so that a single
3100 * completion is still sufficient to unfreeze
3103 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
3106 dev->flags |= CAM_DEV_REL_ON_COMPLETE;
3107 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
3111 if ((crs->release_flags & RELSIM_RELEASE_AFTER_QEMPTY) != 0) {
3113 if ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0
3114 || (dev->ccbq.dev_active == 0)) {
3116 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
3119 dev->flags |= CAM_DEV_REL_ON_QUEUE_EMPTY;
3120 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
3123 mtx_unlock(&dev->sim->devq->send_mtx);
3125 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) == 0)
3126 xpt_release_devq(path, /*count*/1, /*run_queue*/TRUE);
3127 start_ccb->crs.qfrozen_cnt = dev->ccbq.queue.qfrozen_cnt;
3128 start_ccb->ccb_h.status = CAM_REQ_CMP;
3132 struct cam_path *oldpath;
3134 /* Check that all request bits are supported. */
3135 if (start_ccb->cdbg.flags & ~(CAM_DEBUG_COMPILE)) {
3136 start_ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
3140 cam_dflags = CAM_DEBUG_NONE;
3141 if (cam_dpath != NULL) {
3142 oldpath = cam_dpath;
3144 xpt_free_path(oldpath);
3146 if (start_ccb->cdbg.flags != CAM_DEBUG_NONE) {
3147 if (xpt_create_path(&cam_dpath, NULL,
3148 start_ccb->ccb_h.path_id,
3149 start_ccb->ccb_h.target_id,
3150 start_ccb->ccb_h.target_lun) !=
3152 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
3154 cam_dflags = start_ccb->cdbg.flags;
3155 start_ccb->ccb_h.status = CAM_REQ_CMP;
3156 xpt_print(cam_dpath, "debugging flags now %x\n",
3160 start_ccb->ccb_h.status = CAM_REQ_CMP;
3164 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0)
3165 xpt_freeze_devq(path, 1);
3166 start_ccb->ccb_h.status = CAM_REQ_CMP;
3168 case XPT_REPROBE_LUN:
3169 xpt_async(AC_INQ_CHANGED, path, NULL);
3170 start_ccb->ccb_h.status = CAM_REQ_CMP;
3171 xpt_done(start_ccb);
3178 xpt_print(start_ccb->ccb_h.path,
3179 "%s: CCB type %#x %s not supported\n", __func__,
3180 start_ccb->ccb_h.func_code,
3181 xpt_action_name(start_ccb->ccb_h.func_code));
3182 start_ccb->ccb_h.status = CAM_PROVIDE_FAIL;
3183 if (start_ccb->ccb_h.func_code & XPT_FC_DEV_QUEUED) {
3184 xpt_done(start_ccb);
3188 CAM_DEBUG(path, CAM_DEBUG_TRACE,
3189 ("xpt_action_default: func= %#x %s status %#x\n",
3190 start_ccb->ccb_h.func_code,
3191 xpt_action_name(start_ccb->ccb_h.func_code),
3192 start_ccb->ccb_h.status));
3196 xpt_polled_action(union ccb *start_ccb)
3199 struct cam_sim *sim;
3200 struct cam_devq *devq;
3204 timeout = start_ccb->ccb_h.timeout * 10;
3205 sim = start_ccb->ccb_h.path->bus->sim;
3208 dev = start_ccb->ccb_h.path->device;
3210 mtx_unlock(&dev->device_mtx);
3213 * Steal an opening so that no other queued requests
3214 * can get it before us while we simulate interrupts.
3216 mtx_lock(&devq->send_mtx);
3217 dev->ccbq.dev_openings--;
3218 while((devq->send_openings <= 0 || dev->ccbq.dev_openings < 0) &&
3220 mtx_unlock(&devq->send_mtx);
3224 (*(sim->sim_poll))(sim);
3228 mtx_lock(&devq->send_mtx);
3230 dev->ccbq.dev_openings++;
3231 mtx_unlock(&devq->send_mtx);
3234 xpt_action(start_ccb);
3235 while(--timeout > 0) {
3238 (*(sim->sim_poll))(sim);
3242 if ((start_ccb->ccb_h.status & CAM_STATUS_MASK)
3249 * XXX Is it worth adding a sim_timeout entry
3250 * point so we can attempt recovery? If
3251 * this is only used for dumps, I don't think
3254 start_ccb->ccb_h.status = CAM_CMD_TIMEOUT;
3257 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
3260 mtx_lock(&dev->device_mtx);
3264 * Schedule a peripheral driver to receive a ccb when its
3265 * target device has space for more transactions.
3268 xpt_schedule(struct cam_periph *periph, u_int32_t new_priority)
3271 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("xpt_schedule\n"));
3272 cam_periph_assert(periph, MA_OWNED);
3273 if (new_priority < periph->scheduled_priority) {
3274 periph->scheduled_priority = new_priority;
3275 xpt_run_allocq(periph, 0);
3281 * Schedule a device to run on a given queue.
3282 * If the device was inserted as a new entry on the queue,
3283 * return 1 meaning the device queue should be run. If we
3284 * were already queued, implying someone else has already
3285 * started the queue, return 0 so the caller doesn't attempt
3289 xpt_schedule_dev(struct camq *queue, cam_pinfo *pinfo,
3290 u_int32_t new_priority)
3293 u_int32_t old_priority;
3295 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_schedule_dev\n"));
3297 old_priority = pinfo->priority;
3300 * Are we already queued?
3302 if (pinfo->index != CAM_UNQUEUED_INDEX) {
3303 /* Simply reorder based on new priority */
3304 if (new_priority < old_priority) {
3305 camq_change_priority(queue, pinfo->index,
3307 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3308 ("changed priority to %d\n",
3314 /* New entry on the queue */
3315 if (new_priority < old_priority)
3316 pinfo->priority = new_priority;
3318 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3319 ("Inserting onto queue\n"));
3320 pinfo->generation = ++queue->generation;
3321 camq_insert(queue, pinfo);
3328 xpt_run_allocq_task(void *context, int pending)
3330 struct cam_periph *periph = context;
3332 cam_periph_lock(periph);
3333 periph->flags &= ~CAM_PERIPH_RUN_TASK;
3334 xpt_run_allocq(periph, 1);
3335 cam_periph_unlock(periph);
3336 cam_periph_release(periph);
3340 xpt_run_allocq(struct cam_periph *periph, int sleep)
3342 struct cam_ed *device;
3346 cam_periph_assert(periph, MA_OWNED);
3347 if (periph->periph_allocating)
3349 periph->periph_allocating = 1;
3350 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_allocq(%p)\n", periph));
3351 device = periph->path->device;
3354 while ((prio = min(periph->scheduled_priority,
3355 periph->immediate_priority)) != CAM_PRIORITY_NONE &&
3356 (periph->periph_allocated - (ccb != NULL ? 1 : 0) <
3357 device->ccbq.total_openings || prio <= CAM_PRIORITY_OOB)) {
3360 (ccb = xpt_get_ccb_nowait(periph)) == NULL) {
3362 ccb = xpt_get_ccb(periph);
3365 if (periph->flags & CAM_PERIPH_RUN_TASK)
3367 cam_periph_doacquire(periph);
3368 periph->flags |= CAM_PERIPH_RUN_TASK;
3369 taskqueue_enqueue(xsoftc.xpt_taskq,
3370 &periph->periph_run_task);
3373 xpt_setup_ccb(&ccb->ccb_h, periph->path, prio);
3374 if (prio == periph->immediate_priority) {
3375 periph->immediate_priority = CAM_PRIORITY_NONE;
3376 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3377 ("waking cam_periph_getccb()\n"));
3378 SLIST_INSERT_HEAD(&periph->ccb_list, &ccb->ccb_h,
3380 wakeup(&periph->ccb_list);
3382 periph->scheduled_priority = CAM_PRIORITY_NONE;
3383 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3384 ("calling periph_start()\n"));
3385 periph->periph_start(periph, ccb);
3390 xpt_release_ccb(ccb);
3391 periph->periph_allocating = 0;
3395 xpt_run_devq(struct cam_devq *devq)
3399 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_devq\n"));
3401 devq->send_queue.qfrozen_cnt++;
3402 while ((devq->send_queue.entries > 0)
3403 && (devq->send_openings > 0)
3404 && (devq->send_queue.qfrozen_cnt <= 1)) {
3405 struct cam_ed *device;
3406 union ccb *work_ccb;
3407 struct cam_sim *sim;
3408 struct xpt_proto *proto;
3410 device = (struct cam_ed *)camq_remove(&devq->send_queue,
3412 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3413 ("running device %p\n", device));
3415 work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD);
3416 if (work_ccb == NULL) {
3417 printf("device on run queue with no ccbs???\n");
3421 if ((work_ccb->ccb_h.flags & CAM_HIGH_POWER) != 0) {
3423 mtx_lock(&xsoftc.xpt_highpower_lock);
3424 if (xsoftc.num_highpower <= 0) {
3426 * We got a high power command, but we
3427 * don't have any available slots. Freeze
3428 * the device queue until we have a slot
3431 xpt_freeze_devq_device(device, 1);
3432 STAILQ_INSERT_TAIL(&xsoftc.highpowerq, device,
3435 mtx_unlock(&xsoftc.xpt_highpower_lock);
3439 * Consume a high power slot while
3442 xsoftc.num_highpower--;
3444 mtx_unlock(&xsoftc.xpt_highpower_lock);
3446 cam_ccbq_remove_ccb(&device->ccbq, work_ccb);
3447 cam_ccbq_send_ccb(&device->ccbq, work_ccb);
3448 devq->send_openings--;
3449 devq->send_active++;
3450 xpt_schedule_devq(devq, device);
3451 mtx_unlock(&devq->send_mtx);
3453 if ((work_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0) {
3455 * The client wants to freeze the queue
3456 * after this CCB is sent.
3458 xpt_freeze_devq(work_ccb->ccb_h.path, 1);
3461 /* In Target mode, the peripheral driver knows best... */
3462 if (work_ccb->ccb_h.func_code == XPT_SCSI_IO) {
3463 if ((device->inq_flags & SID_CmdQue) != 0
3464 && work_ccb->csio.tag_action != CAM_TAG_ACTION_NONE)
3465 work_ccb->ccb_h.flags |= CAM_TAG_ACTION_VALID;
3468 * Clear this in case of a retried CCB that
3469 * failed due to a rejected tag.
3471 work_ccb->ccb_h.flags &= ~CAM_TAG_ACTION_VALID;
3474 KASSERT(device == work_ccb->ccb_h.path->device,
3475 ("device (%p) / path->device (%p) mismatch",
3476 device, work_ccb->ccb_h.path->device));
3477 proto = xpt_proto_find(device->protocol);
3478 if (proto && proto->ops->debug_out)
3479 proto->ops->debug_out(work_ccb);
3482 * Device queues can be shared among multiple SIM instances
3483 * that reside on different buses. Use the SIM from the
3484 * queued device, rather than the one from the calling bus.
3488 if (mtx && !mtx_owned(mtx))
3492 work_ccb->ccb_h.qos.sim_data = sbinuptime(); // xxx uintprt_t too small 32bit platforms
3493 (*(sim->sim_action))(sim, work_ccb);
3496 mtx_lock(&devq->send_mtx);
3498 devq->send_queue.qfrozen_cnt--;
3502 * This function merges stuff from the slave ccb into the master ccb, while
3503 * keeping important fields in the master ccb constant.
3506 xpt_merge_ccb(union ccb *master_ccb, union ccb *slave_ccb)
3510 * Pull fields that are valid for peripheral drivers to set
3511 * into the master CCB along with the CCB "payload".
3513 master_ccb->ccb_h.retry_count = slave_ccb->ccb_h.retry_count;
3514 master_ccb->ccb_h.func_code = slave_ccb->ccb_h.func_code;
3515 master_ccb->ccb_h.timeout = slave_ccb->ccb_h.timeout;
3516 master_ccb->ccb_h.flags = slave_ccb->ccb_h.flags;
3517 bcopy(&(&slave_ccb->ccb_h)[1], &(&master_ccb->ccb_h)[1],
3518 sizeof(union ccb) - sizeof(struct ccb_hdr));
3522 xpt_setup_ccb_flags(struct ccb_hdr *ccb_h, struct cam_path *path,
3523 u_int32_t priority, u_int32_t flags)
3526 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_setup_ccb\n"));
3527 ccb_h->pinfo.priority = priority;
3529 ccb_h->path_id = path->bus->path_id;
3531 ccb_h->target_id = path->target->target_id;
3533 ccb_h->target_id = CAM_TARGET_WILDCARD;
3535 ccb_h->target_lun = path->device->lun_id;
3536 ccb_h->pinfo.generation = ++path->device->ccbq.queue.generation;
3538 ccb_h->target_lun = CAM_TARGET_WILDCARD;
3540 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX;
3541 ccb_h->flags = flags;
3546 xpt_setup_ccb(struct ccb_hdr *ccb_h, struct cam_path *path, u_int32_t priority)
3548 xpt_setup_ccb_flags(ccb_h, path, priority, /*flags*/ 0);
3551 /* Path manipulation functions */
3553 xpt_create_path(struct cam_path **new_path_ptr, struct cam_periph *perph,
3554 path_id_t path_id, target_id_t target_id, lun_id_t lun_id)
3556 struct cam_path *path;
3559 path = (struct cam_path *)malloc(sizeof(*path), M_CAMPATH, M_NOWAIT);
3562 status = CAM_RESRC_UNAVAIL;
3565 status = xpt_compile_path(path, perph, path_id, target_id, lun_id);
3566 if (status != CAM_REQ_CMP) {
3567 free(path, M_CAMPATH);
3570 *new_path_ptr = path;
3575 xpt_create_path_unlocked(struct cam_path **new_path_ptr,
3576 struct cam_periph *periph, path_id_t path_id,
3577 target_id_t target_id, lun_id_t lun_id)
3580 return (xpt_create_path(new_path_ptr, periph, path_id, target_id,
3585 xpt_compile_path(struct cam_path *new_path, struct cam_periph *perph,
3586 path_id_t path_id, target_id_t target_id, lun_id_t lun_id)
3589 struct cam_et *target;
3590 struct cam_ed *device;
3593 status = CAM_REQ_CMP; /* Completed without error */
3594 target = NULL; /* Wildcarded */
3595 device = NULL; /* Wildcarded */
3598 * We will potentially modify the EDT, so block interrupts
3599 * that may attempt to create cam paths.
3601 bus = xpt_find_bus(path_id);
3603 status = CAM_PATH_INVALID;
3606 mtx_lock(&bus->eb_mtx);
3607 target = xpt_find_target(bus, target_id);
3608 if (target == NULL) {
3610 struct cam_et *new_target;
3612 new_target = xpt_alloc_target(bus, target_id);
3613 if (new_target == NULL) {
3614 status = CAM_RESRC_UNAVAIL;
3616 target = new_target;
3620 if (target != NULL) {
3621 device = xpt_find_device(target, lun_id);
3622 if (device == NULL) {
3624 struct cam_ed *new_device;
3627 (*(bus->xport->ops->alloc_device))(bus,
3630 if (new_device == NULL) {
3631 status = CAM_RESRC_UNAVAIL;
3633 device = new_device;
3637 mtx_unlock(&bus->eb_mtx);
3641 * Only touch the user's data if we are successful.
3643 if (status == CAM_REQ_CMP) {
3644 new_path->periph = perph;
3645 new_path->bus = bus;
3646 new_path->target = target;
3647 new_path->device = device;
3648 CAM_DEBUG(new_path, CAM_DEBUG_TRACE, ("xpt_compile_path\n"));
3651 xpt_release_device(device);
3653 xpt_release_target(target);
3655 xpt_release_bus(bus);
3661 xpt_clone_path(struct cam_path **new_path_ptr, struct cam_path *path)
3663 struct cam_path *new_path;
3665 new_path = (struct cam_path *)malloc(sizeof(*path), M_CAMPATH, M_NOWAIT);
3666 if (new_path == NULL)
3667 return(CAM_RESRC_UNAVAIL);
3668 xpt_copy_path(new_path, path);
3669 *new_path_ptr = new_path;
3670 return (CAM_REQ_CMP);
3674 xpt_copy_path(struct cam_path *new_path, struct cam_path *path)
3678 if (path->bus != NULL)
3679 xpt_acquire_bus(path->bus);
3680 if (path->target != NULL)
3681 xpt_acquire_target(path->target);
3682 if (path->device != NULL)
3683 xpt_acquire_device(path->device);
3687 xpt_release_path(struct cam_path *path)
3689 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_path\n"));
3690 if (path->device != NULL) {
3691 xpt_release_device(path->device);
3692 path->device = NULL;
3694 if (path->target != NULL) {
3695 xpt_release_target(path->target);
3696 path->target = NULL;
3698 if (path->bus != NULL) {
3699 xpt_release_bus(path->bus);
3705 xpt_free_path(struct cam_path *path)
3708 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_free_path\n"));
3709 xpt_release_path(path);
3710 free(path, M_CAMPATH);
3714 xpt_path_counts(struct cam_path *path, uint32_t *bus_ref,
3715 uint32_t *periph_ref, uint32_t *target_ref, uint32_t *device_ref)
3721 *bus_ref = path->bus->refcount;
3727 *periph_ref = path->periph->refcount;
3734 *target_ref = path->target->refcount;
3740 *device_ref = path->device->refcount;
3747 * Return -1 for failure, 0 for exact match, 1 for match with wildcards
3748 * in path1, 2 for match with wildcards in path2.
3751 xpt_path_comp(struct cam_path *path1, struct cam_path *path2)
3755 if (path1->bus != path2->bus) {
3756 if (path1->bus->path_id == CAM_BUS_WILDCARD)
3758 else if (path2->bus->path_id == CAM_BUS_WILDCARD)
3763 if (path1->target != path2->target) {
3764 if (path1->target->target_id == CAM_TARGET_WILDCARD) {
3767 } else if (path2->target->target_id == CAM_TARGET_WILDCARD)
3772 if (path1->device != path2->device) {
3773 if (path1->device->lun_id == CAM_LUN_WILDCARD) {
3776 } else if (path2->device->lun_id == CAM_LUN_WILDCARD)
3785 xpt_path_comp_dev(struct cam_path *path, struct cam_ed *dev)
3789 if (path->bus != dev->target->bus) {
3790 if (path->bus->path_id == CAM_BUS_WILDCARD)
3792 else if (dev->target->bus->path_id == CAM_BUS_WILDCARD)
3797 if (path->target != dev->target) {
3798 if (path->target->target_id == CAM_TARGET_WILDCARD) {
3801 } else if (dev->target->target_id == CAM_TARGET_WILDCARD)
3806 if (path->device != dev) {
3807 if (path->device->lun_id == CAM_LUN_WILDCARD) {
3810 } else if (dev->lun_id == CAM_LUN_WILDCARD)
3819 xpt_print_path(struct cam_path *path)
3822 char buffer[XPT_PRINT_LEN];
3824 sbuf_new(&sb, buffer, XPT_PRINT_LEN, SBUF_FIXEDLEN);
3825 xpt_path_sbuf(path, &sb);
3827 printf("%s", sbuf_data(&sb));
3832 xpt_print_device(struct cam_ed *device)
3836 printf("(nopath): ");
3838 printf("(noperiph:%s%d:%d:%d:%jx): ", device->sim->sim_name,
3839 device->sim->unit_number,
3840 device->sim->bus_id,
3841 device->target->target_id,
3842 (uintmax_t)device->lun_id);
3847 xpt_print(struct cam_path *path, const char *fmt, ...)
3851 char buffer[XPT_PRINT_LEN];
3853 sbuf_new(&sb, buffer, XPT_PRINT_LEN, SBUF_FIXEDLEN);
3855 xpt_path_sbuf(path, &sb);
3857 sbuf_vprintf(&sb, fmt, ap);
3861 printf("%s", sbuf_data(&sb));
3866 xpt_path_string(struct cam_path *path, char *str, size_t str_len)
3871 sbuf_new(&sb, str, str_len, 0);
3872 len = xpt_path_sbuf(path, &sb);
3878 xpt_path_sbuf(struct cam_path *path, struct sbuf *sb)
3882 sbuf_printf(sb, "(nopath): ");
3884 if (path->periph != NULL)
3885 sbuf_printf(sb, "(%s%d:", path->periph->periph_name,
3886 path->periph->unit_number);
3888 sbuf_printf(sb, "(noperiph:");
3890 if (path->bus != NULL)
3891 sbuf_printf(sb, "%s%d:%d:", path->bus->sim->sim_name,
3892 path->bus->sim->unit_number,
3893 path->bus->sim->bus_id);
3895 sbuf_printf(sb, "nobus:");
3897 if (path->target != NULL)
3898 sbuf_printf(sb, "%d:", path->target->target_id);
3900 sbuf_printf(sb, "X:");
3902 if (path->device != NULL)
3903 sbuf_printf(sb, "%jx): ",
3904 (uintmax_t)path->device->lun_id);
3906 sbuf_printf(sb, "X): ");
3909 return(sbuf_len(sb));
3913 xpt_path_path_id(struct cam_path *path)
3915 return(path->bus->path_id);
3919 xpt_path_target_id(struct cam_path *path)
3921 if (path->target != NULL)
3922 return (path->target->target_id);
3924 return (CAM_TARGET_WILDCARD);
3928 xpt_path_lun_id(struct cam_path *path)
3930 if (path->device != NULL)
3931 return (path->device->lun_id);
3933 return (CAM_LUN_WILDCARD);
3937 xpt_path_sim(struct cam_path *path)
3940 return (path->bus->sim);
3944 xpt_path_periph(struct cam_path *path)
3947 return (path->periph);
3951 * Release a CAM control block for the caller. Remit the cost of the structure
3952 * to the device referenced by the path. If the this device had no 'credits'
3953 * and peripheral drivers have registered async callbacks for this notification
3957 xpt_release_ccb(union ccb *free_ccb)
3959 struct cam_ed *device;
3960 struct cam_periph *periph;
3962 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_release_ccb\n"));
3963 xpt_path_assert(free_ccb->ccb_h.path, MA_OWNED);
3964 device = free_ccb->ccb_h.path->device;
3965 periph = free_ccb->ccb_h.path->periph;
3967 xpt_free_ccb(free_ccb);
3968 periph->periph_allocated--;
3969 cam_ccbq_release_opening(&device->ccbq);
3970 xpt_run_allocq(periph, 0);
3973 /* Functions accessed by SIM drivers */
3975 static struct xpt_xport_ops xport_default_ops = {
3976 .alloc_device = xpt_alloc_device_default,
3977 .action = xpt_action_default,
3978 .async = xpt_dev_async_default,
3980 static struct xpt_xport xport_default = {
3981 .xport = XPORT_UNKNOWN,
3983 .ops = &xport_default_ops,
3986 CAM_XPT_XPORT(xport_default);
3989 * A sim structure, listing the SIM entry points and instance
3990 * identification info is passed to xpt_bus_register to hook the SIM
3991 * into the CAM framework. xpt_bus_register creates a cam_eb entry
3992 * for this new bus and places it in the array of buses and assigns
3993 * it a path_id. The path_id may be influenced by "hard wiring"
3994 * information specified by the user. Once interrupt services are
3995 * available, the bus will be probed.
3998 xpt_bus_register(struct cam_sim *sim, device_t parent, u_int32_t bus)
4000 struct cam_eb *new_bus;
4001 struct cam_eb *old_bus;
4002 struct ccb_pathinq cpi;
4003 struct cam_path *path;
4007 new_bus = (struct cam_eb *)malloc(sizeof(*new_bus),
4008 M_CAMXPT, M_NOWAIT|M_ZERO);
4009 if (new_bus == NULL) {
4010 /* Couldn't satisfy request */
4011 return (CAM_RESRC_UNAVAIL);
4014 mtx_init(&new_bus->eb_mtx, "CAM bus lock", NULL, MTX_DEF);
4015 TAILQ_INIT(&new_bus->et_entries);
4018 timevalclear(&new_bus->last_reset);
4020 new_bus->refcount = 1; /* Held until a bus_deregister event */
4021 new_bus->generation = 0;
4024 sim->path_id = new_bus->path_id =
4025 xptpathid(sim->sim_name, sim->unit_number, sim->bus_id);
4026 old_bus = TAILQ_FIRST(&xsoftc.xpt_busses);
4027 while (old_bus != NULL
4028 && old_bus->path_id < new_bus->path_id)
4029 old_bus = TAILQ_NEXT(old_bus, links);
4030 if (old_bus != NULL)
4031 TAILQ_INSERT_BEFORE(old_bus, new_bus, links);
4033 TAILQ_INSERT_TAIL(&xsoftc.xpt_busses, new_bus, links);
4034 xsoftc.bus_generation++;
4038 * Set a default transport so that a PATH_INQ can be issued to
4039 * the SIM. This will then allow for probing and attaching of
4040 * a more appropriate transport.
4042 new_bus->xport = &xport_default;
4044 status = xpt_create_path(&path, /*periph*/NULL, sim->path_id,
4045 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
4046 if (status != CAM_REQ_CMP) {
4047 xpt_release_bus(new_bus);
4048 free(path, M_CAMXPT);
4049 return (CAM_RESRC_UNAVAIL);
4052 xpt_setup_ccb(&cpi.ccb_h, path, CAM_PRIORITY_NORMAL);
4053 cpi.ccb_h.func_code = XPT_PATH_INQ;
4054 xpt_action((union ccb *)&cpi);
4056 if (cpi.ccb_h.status == CAM_REQ_CMP) {
4057 struct xpt_xport **xpt;
4059 SET_FOREACH(xpt, cam_xpt_xport_set) {
4060 if ((*xpt)->xport == cpi.transport) {
4061 new_bus->xport = *xpt;
4065 if (new_bus->xport == NULL) {
4067 "No transport found for %d\n", cpi.transport);
4068 xpt_release_bus(new_bus);
4069 free(path, M_CAMXPT);
4070 return (CAM_RESRC_UNAVAIL);
4074 /* Notify interested parties */
4075 if (sim->path_id != CAM_XPT_PATH_ID) {
4077 xpt_async(AC_PATH_REGISTERED, path, &cpi);
4078 if ((cpi.hba_misc & PIM_NOSCAN) == 0) {
4079 union ccb *scan_ccb;
4081 /* Initiate bus rescan. */
4082 scan_ccb = xpt_alloc_ccb_nowait();
4083 if (scan_ccb != NULL) {
4084 scan_ccb->ccb_h.path = path;
4085 scan_ccb->ccb_h.func_code = XPT_SCAN_BUS;
4086 scan_ccb->crcn.flags = 0;
4087 xpt_rescan(scan_ccb);
4090 "Can't allocate CCB to scan bus\n");
4091 xpt_free_path(path);
4094 xpt_free_path(path);
4096 xpt_free_path(path);
4097 return (CAM_SUCCESS);
4101 xpt_bus_deregister(path_id_t pathid)
4103 struct cam_path bus_path;
4106 status = xpt_compile_path(&bus_path, NULL, pathid,
4107 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
4108 if (status != CAM_REQ_CMP)
4111 xpt_async(AC_LOST_DEVICE, &bus_path, NULL);
4112 xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL);
4114 /* Release the reference count held while registered. */
4115 xpt_release_bus(bus_path.bus);
4116 xpt_release_path(&bus_path);
4118 return (CAM_REQ_CMP);
4122 xptnextfreepathid(void)
4128 mtx_assert(&xsoftc.xpt_topo_lock, MA_OWNED);
4130 bus = TAILQ_FIRST(&xsoftc.xpt_busses);
4132 /* Find an unoccupied pathid */
4133 while (bus != NULL && bus->path_id <= pathid) {
4134 if (bus->path_id == pathid)
4136 bus = TAILQ_NEXT(bus, links);
4140 * Ensure that this pathid is not reserved for
4141 * a bus that may be registered in the future.
4143 if (resource_string_value("scbus", pathid, "at", &strval) == 0) {
4145 /* Start the search over */
4152 xptpathid(const char *sim_name, int sim_unit, int sim_bus)
4159 pathid = CAM_XPT_PATH_ID;
4160 snprintf(buf, sizeof(buf), "%s%d", sim_name, sim_unit);
4161 if (strcmp(buf, "xpt0") == 0 && sim_bus == 0)
4164 while ((resource_find_match(&i, &dname, &dunit, "at", buf)) == 0) {
4165 if (strcmp(dname, "scbus")) {
4166 /* Avoid a bit of foot shooting. */
4169 if (dunit < 0) /* unwired?! */
4171 if (resource_int_value("scbus", dunit, "bus", &val) == 0) {
4172 if (sim_bus == val) {
4176 } else if (sim_bus == 0) {
4177 /* Unspecified matches bus 0 */
4181 printf("Ambiguous scbus configuration for %s%d "
4182 "bus %d, cannot wire down. The kernel "
4183 "config entry for scbus%d should "
4184 "specify a controller bus.\n"
4185 "Scbus will be assigned dynamically.\n",
4186 sim_name, sim_unit, sim_bus, dunit);
4191 if (pathid == CAM_XPT_PATH_ID)
4192 pathid = xptnextfreepathid();
4197 xpt_async_string(u_int32_t async_code)
4200 switch (async_code) {
4201 case AC_BUS_RESET: return ("AC_BUS_RESET");
4202 case AC_UNSOL_RESEL: return ("AC_UNSOL_RESEL");
4203 case AC_SCSI_AEN: return ("AC_SCSI_AEN");
4204 case AC_SENT_BDR: return ("AC_SENT_BDR");
4205 case AC_PATH_REGISTERED: return ("AC_PATH_REGISTERED");
4206 case AC_PATH_DEREGISTERED: return ("AC_PATH_DEREGISTERED");
4207 case AC_FOUND_DEVICE: return ("AC_FOUND_DEVICE");
4208 case AC_LOST_DEVICE: return ("AC_LOST_DEVICE");
4209 case AC_TRANSFER_NEG: return ("AC_TRANSFER_NEG");
4210 case AC_INQ_CHANGED: return ("AC_INQ_CHANGED");
4211 case AC_GETDEV_CHANGED: return ("AC_GETDEV_CHANGED");
4212 case AC_CONTRACT: return ("AC_CONTRACT");
4213 case AC_ADVINFO_CHANGED: return ("AC_ADVINFO_CHANGED");
4214 case AC_UNIT_ATTENTION: return ("AC_UNIT_ATTENTION");
4216 return ("AC_UNKNOWN");
4220 xpt_async_size(u_int32_t async_code)
4223 switch (async_code) {
4224 case AC_BUS_RESET: return (0);
4225 case AC_UNSOL_RESEL: return (0);
4226 case AC_SCSI_AEN: return (0);
4227 case AC_SENT_BDR: return (0);
4228 case AC_PATH_REGISTERED: return (sizeof(struct ccb_pathinq));
4229 case AC_PATH_DEREGISTERED: return (0);
4230 case AC_FOUND_DEVICE: return (sizeof(struct ccb_getdev));
4231 case AC_LOST_DEVICE: return (0);
4232 case AC_TRANSFER_NEG: return (sizeof(struct ccb_trans_settings));
4233 case AC_INQ_CHANGED: return (0);
4234 case AC_GETDEV_CHANGED: return (0);
4235 case AC_CONTRACT: return (sizeof(struct ac_contract));
4236 case AC_ADVINFO_CHANGED: return (-1);
4237 case AC_UNIT_ATTENTION: return (sizeof(struct ccb_scsiio));
4243 xpt_async_process_dev(struct cam_ed *device, void *arg)
4245 union ccb *ccb = arg;
4246 struct cam_path *path = ccb->ccb_h.path;
4247 void *async_arg = ccb->casync.async_arg_ptr;
4248 u_int32_t async_code = ccb->casync.async_code;
4251 if (path->device != device
4252 && path->device->lun_id != CAM_LUN_WILDCARD
4253 && device->lun_id != CAM_LUN_WILDCARD)
4257 * The async callback could free the device.
4258 * If it is a broadcast async, it doesn't hold
4259 * device reference, so take our own reference.
4261 xpt_acquire_device(device);
4264 * If async for specific device is to be delivered to
4265 * the wildcard client, take the specific device lock.
4266 * XXX: We may need a way for client to specify it.
4268 if ((device->lun_id == CAM_LUN_WILDCARD &&
4269 path->device->lun_id != CAM_LUN_WILDCARD) ||
4270 (device->target->target_id == CAM_TARGET_WILDCARD &&
4271 path->target->target_id != CAM_TARGET_WILDCARD) ||
4272 (device->target->bus->path_id == CAM_BUS_WILDCARD &&
4273 path->target->bus->path_id != CAM_BUS_WILDCARD)) {
4274 mtx_unlock(&device->device_mtx);
4275 xpt_path_lock(path);
4280 (*(device->target->bus->xport->ops->async))(async_code,
4281 device->target->bus, device->target, device, async_arg);
4282 xpt_async_bcast(&device->asyncs, async_code, path, async_arg);
4285 xpt_path_unlock(path);
4286 mtx_lock(&device->device_mtx);
4288 xpt_release_device(device);
4293 xpt_async_process_tgt(struct cam_et *target, void *arg)
4295 union ccb *ccb = arg;
4296 struct cam_path *path = ccb->ccb_h.path;
4298 if (path->target != target
4299 && path->target->target_id != CAM_TARGET_WILDCARD
4300 && target->target_id != CAM_TARGET_WILDCARD)
4303 if (ccb->casync.async_code == AC_SENT_BDR) {
4304 /* Update our notion of when the last reset occurred */
4305 microtime(&target->last_reset);
4308 return (xptdevicetraverse(target, NULL, xpt_async_process_dev, ccb));
4312 xpt_async_process(struct cam_periph *periph, union ccb *ccb)
4315 struct cam_path *path;
4317 u_int32_t async_code;
4319 path = ccb->ccb_h.path;
4320 async_code = ccb->casync.async_code;
4321 async_arg = ccb->casync.async_arg_ptr;
4322 CAM_DEBUG(path, CAM_DEBUG_TRACE | CAM_DEBUG_INFO,
4323 ("xpt_async(%s)\n", xpt_async_string(async_code)));
4326 if (async_code == AC_BUS_RESET) {
4327 /* Update our notion of when the last reset occurred */
4328 microtime(&bus->last_reset);
4331 xpttargettraverse(bus, NULL, xpt_async_process_tgt, ccb);
4334 * If this wasn't a fully wildcarded async, tell all
4335 * clients that want all async events.
4337 if (bus != xpt_periph->path->bus) {
4338 xpt_path_lock(xpt_periph->path);
4339 xpt_async_process_dev(xpt_periph->path->device, ccb);
4340 xpt_path_unlock(xpt_periph->path);
4343 if (path->device != NULL && path->device->lun_id != CAM_LUN_WILDCARD)
4344 xpt_release_devq(path, 1, TRUE);
4346 xpt_release_simq(path->bus->sim, TRUE);
4347 if (ccb->casync.async_arg_size > 0)
4348 free(async_arg, M_CAMXPT);
4349 xpt_free_path(path);
4354 xpt_async_bcast(struct async_list *async_head,
4355 u_int32_t async_code,
4356 struct cam_path *path, void *async_arg)
4358 struct async_node *cur_entry;
4361 cur_entry = SLIST_FIRST(async_head);
4362 while (cur_entry != NULL) {
4363 struct async_node *next_entry;
4365 * Grab the next list entry before we call the current
4366 * entry's callback. This is because the callback function
4367 * can delete its async callback entry.
4369 next_entry = SLIST_NEXT(cur_entry, links);
4370 if ((cur_entry->event_enable & async_code) != 0) {
4371 mtx = cur_entry->event_lock ?
4372 path->device->sim->mtx : NULL;
4375 cur_entry->callback(cur_entry->callback_arg,
4381 cur_entry = next_entry;
4386 xpt_async(u_int32_t async_code, struct cam_path *path, void *async_arg)
4391 ccb = xpt_alloc_ccb_nowait();
4393 xpt_print(path, "Can't allocate CCB to send %s\n",
4394 xpt_async_string(async_code));
4398 if (xpt_clone_path(&ccb->ccb_h.path, path) != CAM_REQ_CMP) {
4399 xpt_print(path, "Can't allocate path to send %s\n",
4400 xpt_async_string(async_code));
4404 ccb->ccb_h.path->periph = NULL;
4405 ccb->ccb_h.func_code = XPT_ASYNC;
4406 ccb->ccb_h.cbfcnp = xpt_async_process;
4407 ccb->ccb_h.flags |= CAM_UNLOCKED;
4408 ccb->casync.async_code = async_code;
4409 ccb->casync.async_arg_size = 0;
4410 size = xpt_async_size(async_code);
4411 CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE,
4412 ("xpt_async: func %#x %s aync_code %d %s\n",
4413 ccb->ccb_h.func_code,
4414 xpt_action_name(ccb->ccb_h.func_code),
4416 xpt_async_string(async_code)));
4417 if (size > 0 && async_arg != NULL) {
4418 ccb->casync.async_arg_ptr = malloc(size, M_CAMXPT, M_NOWAIT);
4419 if (ccb->casync.async_arg_ptr == NULL) {
4420 xpt_print(path, "Can't allocate argument to send %s\n",
4421 xpt_async_string(async_code));
4422 xpt_free_path(ccb->ccb_h.path);
4426 memcpy(ccb->casync.async_arg_ptr, async_arg, size);
4427 ccb->casync.async_arg_size = size;
4428 } else if (size < 0) {
4429 ccb->casync.async_arg_ptr = async_arg;
4430 ccb->casync.async_arg_size = size;
4432 if (path->device != NULL && path->device->lun_id != CAM_LUN_WILDCARD)
4433 xpt_freeze_devq(path, 1);
4435 xpt_freeze_simq(path->bus->sim, 1);
4440 xpt_dev_async_default(u_int32_t async_code, struct cam_eb *bus,
4441 struct cam_et *target, struct cam_ed *device,
4446 * We only need to handle events for real devices.
4448 if (target->target_id == CAM_TARGET_WILDCARD
4449 || device->lun_id == CAM_LUN_WILDCARD)
4452 printf("%s called\n", __func__);
4456 xpt_freeze_devq_device(struct cam_ed *dev, u_int count)
4458 struct cam_devq *devq;
4461 devq = dev->sim->devq;
4462 mtx_assert(&devq->send_mtx, MA_OWNED);
4463 CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE,
4464 ("xpt_freeze_devq_device(%d) %u->%u\n", count,
4465 dev->ccbq.queue.qfrozen_cnt, dev->ccbq.queue.qfrozen_cnt + count));
4466 freeze = (dev->ccbq.queue.qfrozen_cnt += count);
4467 /* Remove frozen device from sendq. */
4468 if (device_is_queued(dev))
4469 camq_remove(&devq->send_queue, dev->devq_entry.index);
4474 xpt_freeze_devq(struct cam_path *path, u_int count)
4476 struct cam_ed *dev = path->device;
4477 struct cam_devq *devq;
4480 devq = dev->sim->devq;
4481 mtx_lock(&devq->send_mtx);
4482 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_freeze_devq(%d)\n", count));
4483 freeze = xpt_freeze_devq_device(dev, count);
4484 mtx_unlock(&devq->send_mtx);
4489 xpt_freeze_simq(struct cam_sim *sim, u_int count)
4491 struct cam_devq *devq;
4495 mtx_lock(&devq->send_mtx);
4496 freeze = (devq->send_queue.qfrozen_cnt += count);
4497 mtx_unlock(&devq->send_mtx);
4502 xpt_release_devq_timeout(void *arg)
4505 struct cam_devq *devq;
4507 dev = (struct cam_ed *)arg;
4508 CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE, ("xpt_release_devq_timeout\n"));
4509 devq = dev->sim->devq;
4510 mtx_assert(&devq->send_mtx, MA_OWNED);
4511 if (xpt_release_devq_device(dev, /*count*/1, /*run_queue*/TRUE))
4516 xpt_release_devq(struct cam_path *path, u_int count, int run_queue)
4519 struct cam_devq *devq;
4521 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_devq(%d, %d)\n",
4524 devq = dev->sim->devq;
4525 mtx_lock(&devq->send_mtx);
4526 if (xpt_release_devq_device(dev, count, run_queue))
4527 xpt_run_devq(dev->sim->devq);
4528 mtx_unlock(&devq->send_mtx);
4532 xpt_release_devq_device(struct cam_ed *dev, u_int count, int run_queue)
4535 mtx_assert(&dev->sim->devq->send_mtx, MA_OWNED);
4536 CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE,
4537 ("xpt_release_devq_device(%d, %d) %u->%u\n", count, run_queue,
4538 dev->ccbq.queue.qfrozen_cnt, dev->ccbq.queue.qfrozen_cnt - count));
4539 if (count > dev->ccbq.queue.qfrozen_cnt) {
4541 printf("xpt_release_devq(): requested %u > present %u\n",
4542 count, dev->ccbq.queue.qfrozen_cnt);
4544 count = dev->ccbq.queue.qfrozen_cnt;
4546 dev->ccbq.queue.qfrozen_cnt -= count;
4547 if (dev->ccbq.queue.qfrozen_cnt == 0) {
4549 * No longer need to wait for a successful
4550 * command completion.
4552 dev->flags &= ~CAM_DEV_REL_ON_COMPLETE;
4554 * Remove any timeouts that might be scheduled
4555 * to release this queue.
4557 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) {
4558 callout_stop(&dev->callout);
4559 dev->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING;
4562 * Now that we are unfrozen schedule the
4563 * device so any pending transactions are
4566 xpt_schedule_devq(dev->sim->devq, dev);
4573 xpt_release_simq(struct cam_sim *sim, int run_queue)
4575 struct cam_devq *devq;
4578 mtx_lock(&devq->send_mtx);
4579 if (devq->send_queue.qfrozen_cnt <= 0) {
4581 printf("xpt_release_simq: requested 1 > present %u\n",
4582 devq->send_queue.qfrozen_cnt);
4585 devq->send_queue.qfrozen_cnt--;
4586 if (devq->send_queue.qfrozen_cnt == 0) {
4588 * If there is a timeout scheduled to release this
4589 * sim queue, remove it. The queue frozen count is
4592 if ((sim->flags & CAM_SIM_REL_TIMEOUT_PENDING) != 0){
4593 callout_stop(&sim->callout);
4594 sim->flags &= ~CAM_SIM_REL_TIMEOUT_PENDING;
4598 * Now that we are unfrozen run the send queue.
4600 xpt_run_devq(sim->devq);
4603 mtx_unlock(&devq->send_mtx);
4607 * XXX Appears to be unused.
4610 xpt_release_simq_timeout(void *arg)
4612 struct cam_sim *sim;
4614 sim = (struct cam_sim *)arg;
4615 xpt_release_simq(sim, /* run_queue */ TRUE);
4619 xpt_done(union ccb *done_ccb)
4621 struct cam_doneq *queue;
4624 #if defined(BUF_TRACKING) || defined(FULL_BUF_TRACKING)
4625 if (done_ccb->ccb_h.func_code == XPT_SCSI_IO &&
4626 done_ccb->csio.bio != NULL)
4627 biotrack(done_ccb->csio.bio, __func__);
4630 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE,
4631 ("xpt_done: func= %#x %s status %#x\n",
4632 done_ccb->ccb_h.func_code,
4633 xpt_action_name(done_ccb->ccb_h.func_code),
4634 done_ccb->ccb_h.status));
4635 if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) == 0)
4638 /* Store the time the ccb was in the sim */
4639 done_ccb->ccb_h.qos.sim_data = sbinuptime() - done_ccb->ccb_h.qos.sim_data;
4640 hash = (done_ccb->ccb_h.path_id + done_ccb->ccb_h.target_id +
4641 done_ccb->ccb_h.target_lun) % cam_num_doneqs;
4642 queue = &cam_doneqs[hash];
4643 mtx_lock(&queue->cam_doneq_mtx);
4644 run = (queue->cam_doneq_sleep && STAILQ_EMPTY(&queue->cam_doneq));
4645 STAILQ_INSERT_TAIL(&queue->cam_doneq, &done_ccb->ccb_h, sim_links.stqe);
4646 done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX;
4647 mtx_unlock(&queue->cam_doneq_mtx);
4649 wakeup(&queue->cam_doneq);
4653 xpt_done_direct(union ccb *done_ccb)
4656 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE,
4657 ("xpt_done_direct: status %#x\n", done_ccb->ccb_h.status));
4658 if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) == 0)
4661 /* Store the time the ccb was in the sim */
4662 done_ccb->ccb_h.qos.sim_data = sbinuptime() - done_ccb->ccb_h.qos.sim_data;
4663 xpt_done_process(&done_ccb->ccb_h);
4671 new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_WAITOK);
4676 xpt_alloc_ccb_nowait()
4680 new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_NOWAIT);
4685 xpt_free_ccb(union ccb *free_ccb)
4687 free(free_ccb, M_CAMCCB);
4692 /* Private XPT functions */
4695 * Get a CAM control block for the caller. Charge the structure to the device
4696 * referenced by the path. If we don't have sufficient resources to allocate
4697 * more ccbs, we return NULL.
4700 xpt_get_ccb_nowait(struct cam_periph *periph)
4704 new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_NOWAIT);
4705 if (new_ccb == NULL)
4707 periph->periph_allocated++;
4708 cam_ccbq_take_opening(&periph->path->device->ccbq);
4713 xpt_get_ccb(struct cam_periph *periph)
4717 cam_periph_unlock(periph);
4718 new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_WAITOK);
4719 cam_periph_lock(periph);
4720 periph->periph_allocated++;
4721 cam_ccbq_take_opening(&periph->path->device->ccbq);
4726 cam_periph_getccb(struct cam_periph *periph, u_int32_t priority)
4728 struct ccb_hdr *ccb_h;
4730 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("cam_periph_getccb\n"));
4731 cam_periph_assert(periph, MA_OWNED);
4732 while ((ccb_h = SLIST_FIRST(&periph->ccb_list)) == NULL ||
4733 ccb_h->pinfo.priority != priority) {
4734 if (priority < periph->immediate_priority) {
4735 periph->immediate_priority = priority;
4736 xpt_run_allocq(periph, 0);
4738 cam_periph_sleep(periph, &periph->ccb_list, PRIBIO,
4741 SLIST_REMOVE_HEAD(&periph->ccb_list, periph_links.sle);
4742 return ((union ccb *)ccb_h);
4746 xpt_acquire_bus(struct cam_eb *bus)
4755 xpt_release_bus(struct cam_eb *bus)
4759 KASSERT(bus->refcount >= 1, ("bus->refcount >= 1"));
4760 if (--bus->refcount > 0) {
4764 TAILQ_REMOVE(&xsoftc.xpt_busses, bus, links);
4765 xsoftc.bus_generation++;
4767 KASSERT(TAILQ_EMPTY(&bus->et_entries),
4768 ("destroying bus, but target list is not empty"));
4769 cam_sim_release(bus->sim);
4770 mtx_destroy(&bus->eb_mtx);
4771 free(bus, M_CAMXPT);
4774 static struct cam_et *
4775 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id)
4777 struct cam_et *cur_target, *target;
4779 mtx_assert(&xsoftc.xpt_topo_lock, MA_OWNED);
4780 mtx_assert(&bus->eb_mtx, MA_OWNED);
4781 target = (struct cam_et *)malloc(sizeof(*target), M_CAMXPT,
4786 TAILQ_INIT(&target->ed_entries);
4788 target->target_id = target_id;
4789 target->refcount = 1;
4790 target->generation = 0;
4791 target->luns = NULL;
4792 mtx_init(&target->luns_mtx, "CAM LUNs lock", NULL, MTX_DEF);
4793 timevalclear(&target->last_reset);
4795 * Hold a reference to our parent bus so it
4796 * will not go away before we do.
4800 /* Insertion sort into our bus's target list */
4801 cur_target = TAILQ_FIRST(&bus->et_entries);
4802 while (cur_target != NULL && cur_target->target_id < target_id)
4803 cur_target = TAILQ_NEXT(cur_target, links);
4804 if (cur_target != NULL) {
4805 TAILQ_INSERT_BEFORE(cur_target, target, links);
4807 TAILQ_INSERT_TAIL(&bus->et_entries, target, links);
4814 xpt_acquire_target(struct cam_et *target)
4816 struct cam_eb *bus = target->bus;
4818 mtx_lock(&bus->eb_mtx);
4820 mtx_unlock(&bus->eb_mtx);
4824 xpt_release_target(struct cam_et *target)
4826 struct cam_eb *bus = target->bus;
4828 mtx_lock(&bus->eb_mtx);
4829 if (--target->refcount > 0) {
4830 mtx_unlock(&bus->eb_mtx);
4833 TAILQ_REMOVE(&bus->et_entries, target, links);
4835 mtx_unlock(&bus->eb_mtx);
4836 KASSERT(TAILQ_EMPTY(&target->ed_entries),
4837 ("destroying target, but device list is not empty"));
4838 xpt_release_bus(bus);
4839 mtx_destroy(&target->luns_mtx);
4841 free(target->luns, M_CAMXPT);
4842 free(target, M_CAMXPT);
4845 static struct cam_ed *
4846 xpt_alloc_device_default(struct cam_eb *bus, struct cam_et *target,
4849 struct cam_ed *device;
4851 device = xpt_alloc_device(bus, target, lun_id);
4855 device->mintags = 1;
4856 device->maxtags = 1;
4861 xpt_destroy_device(void *context, int pending)
4863 struct cam_ed *device = context;
4865 mtx_lock(&device->device_mtx);
4866 mtx_destroy(&device->device_mtx);
4867 free(device, M_CAMDEV);
4871 xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, lun_id_t lun_id)
4873 struct cam_ed *cur_device, *device;
4874 struct cam_devq *devq;
4877 mtx_assert(&bus->eb_mtx, MA_OWNED);
4878 /* Make space for us in the device queue on our bus */
4879 devq = bus->sim->devq;
4880 mtx_lock(&devq->send_mtx);
4881 status = cam_devq_resize(devq, devq->send_queue.array_size + 1);
4882 mtx_unlock(&devq->send_mtx);
4883 if (status != CAM_REQ_CMP)
4886 device = (struct cam_ed *)malloc(sizeof(*device),
4887 M_CAMDEV, M_NOWAIT|M_ZERO);
4891 cam_init_pinfo(&device->devq_entry);
4892 device->target = target;
4893 device->lun_id = lun_id;
4894 device->sim = bus->sim;
4895 if (cam_ccbq_init(&device->ccbq,
4896 bus->sim->max_dev_openings) != 0) {
4897 free(device, M_CAMDEV);
4900 SLIST_INIT(&device->asyncs);
4901 SLIST_INIT(&device->periphs);
4902 device->generation = 0;
4903 device->flags = CAM_DEV_UNCONFIGURED;
4904 device->tag_delay_count = 0;
4905 device->tag_saved_openings = 0;
4906 device->refcount = 1;
4907 mtx_init(&device->device_mtx, "CAM device lock", NULL, MTX_DEF);
4908 callout_init_mtx(&device->callout, &devq->send_mtx, 0);
4909 TASK_INIT(&device->device_destroy_task, 0, xpt_destroy_device, device);
4911 * Hold a reference to our parent bus so it
4912 * will not go away before we do.
4916 cur_device = TAILQ_FIRST(&target->ed_entries);
4917 while (cur_device != NULL && cur_device->lun_id < lun_id)
4918 cur_device = TAILQ_NEXT(cur_device, links);
4919 if (cur_device != NULL)
4920 TAILQ_INSERT_BEFORE(cur_device, device, links);
4922 TAILQ_INSERT_TAIL(&target->ed_entries, device, links);
4923 target->generation++;
4928 xpt_acquire_device(struct cam_ed *device)
4930 struct cam_eb *bus = device->target->bus;
4932 mtx_lock(&bus->eb_mtx);
4934 mtx_unlock(&bus->eb_mtx);
4938 xpt_release_device(struct cam_ed *device)
4940 struct cam_eb *bus = device->target->bus;
4941 struct cam_devq *devq;
4943 mtx_lock(&bus->eb_mtx);
4944 if (--device->refcount > 0) {
4945 mtx_unlock(&bus->eb_mtx);
4949 TAILQ_REMOVE(&device->target->ed_entries, device,links);
4950 device->target->generation++;
4951 mtx_unlock(&bus->eb_mtx);
4953 /* Release our slot in the devq */
4954 devq = bus->sim->devq;
4955 mtx_lock(&devq->send_mtx);
4956 cam_devq_resize(devq, devq->send_queue.array_size - 1);
4957 mtx_unlock(&devq->send_mtx);
4959 KASSERT(SLIST_EMPTY(&device->periphs),
4960 ("destroying device, but periphs list is not empty"));
4961 KASSERT(device->devq_entry.index == CAM_UNQUEUED_INDEX,
4962 ("destroying device while still queued for ccbs"));
4964 if ((device->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0)
4965 callout_stop(&device->callout);
4967 xpt_release_target(device->target);
4969 cam_ccbq_fini(&device->ccbq);
4971 * Free allocated memory. free(9) does nothing if the
4972 * supplied pointer is NULL, so it is safe to call without
4975 free(device->supported_vpds, M_CAMXPT);
4976 free(device->device_id, M_CAMXPT);
4977 free(device->ext_inq, M_CAMXPT);
4978 free(device->physpath, M_CAMXPT);
4979 free(device->rcap_buf, M_CAMXPT);
4980 free(device->serial_num, M_CAMXPT);
4981 taskqueue_enqueue(xsoftc.xpt_taskq, &device->device_destroy_task);
4985 xpt_dev_ccbq_resize(struct cam_path *path, int newopenings)
4991 mtx_lock(&dev->sim->devq->send_mtx);
4992 result = cam_ccbq_resize(&dev->ccbq, newopenings);
4993 mtx_unlock(&dev->sim->devq->send_mtx);
4994 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
4995 || (dev->inq_flags & SID_CmdQue) != 0)
4996 dev->tag_saved_openings = newopenings;
5000 static struct cam_eb *
5001 xpt_find_bus(path_id_t path_id)
5006 for (bus = TAILQ_FIRST(&xsoftc.xpt_busses);
5008 bus = TAILQ_NEXT(bus, links)) {
5009 if (bus->path_id == path_id) {
5018 static struct cam_et *
5019 xpt_find_target(struct cam_eb *bus, target_id_t target_id)
5021 struct cam_et *target;
5023 mtx_assert(&bus->eb_mtx, MA_OWNED);
5024 for (target = TAILQ_FIRST(&bus->et_entries);
5026 target = TAILQ_NEXT(target, links)) {
5027 if (target->target_id == target_id) {
5035 static struct cam_ed *
5036 xpt_find_device(struct cam_et *target, lun_id_t lun_id)
5038 struct cam_ed *device;
5040 mtx_assert(&target->bus->eb_mtx, MA_OWNED);
5041 for (device = TAILQ_FIRST(&target->ed_entries);
5043 device = TAILQ_NEXT(device, links)) {
5044 if (device->lun_id == lun_id) {
5053 xpt_start_tags(struct cam_path *path)
5055 struct ccb_relsim crs;
5056 struct cam_ed *device;
5057 struct cam_sim *sim;
5060 device = path->device;
5061 sim = path->bus->sim;
5062 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT;
5063 xpt_freeze_devq(path, /*count*/1);
5064 device->inq_flags |= SID_CmdQue;
5065 if (device->tag_saved_openings != 0)
5066 newopenings = device->tag_saved_openings;
5068 newopenings = min(device->maxtags,
5069 sim->max_tagged_dev_openings);
5070 xpt_dev_ccbq_resize(path, newopenings);
5071 xpt_async(AC_GETDEV_CHANGED, path, NULL);
5072 xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL);
5073 crs.ccb_h.func_code = XPT_REL_SIMQ;
5074 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY;
5076 = crs.release_timeout
5079 xpt_action((union ccb *)&crs);
5083 xpt_stop_tags(struct cam_path *path)
5085 struct ccb_relsim crs;
5086 struct cam_ed *device;
5087 struct cam_sim *sim;
5089 device = path->device;
5090 sim = path->bus->sim;
5091 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT;
5092 device->tag_delay_count = 0;
5093 xpt_freeze_devq(path, /*count*/1);
5094 device->inq_flags &= ~SID_CmdQue;
5095 xpt_dev_ccbq_resize(path, sim->max_dev_openings);
5096 xpt_async(AC_GETDEV_CHANGED, path, NULL);
5097 xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL);
5098 crs.ccb_h.func_code = XPT_REL_SIMQ;
5099 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY;
5101 = crs.release_timeout
5104 xpt_action((union ccb *)&crs);
5108 xpt_boot_delay(void *arg)
5115 xpt_config(void *arg)
5118 * Now that interrupts are enabled, go find our devices
5120 if (taskqueue_start_threads(&xsoftc.xpt_taskq, 1, PRIBIO, "CAM taskq"))
5121 printf("xpt_config: failed to create taskqueue thread.\n");
5123 /* Setup debugging path */
5124 if (cam_dflags != CAM_DEBUG_NONE) {
5125 if (xpt_create_path(&cam_dpath, NULL,
5126 CAM_DEBUG_BUS, CAM_DEBUG_TARGET,
5127 CAM_DEBUG_LUN) != CAM_REQ_CMP) {
5128 printf("xpt_config: xpt_create_path() failed for debug"
5129 " target %d:%d:%d, debugging disabled\n",
5130 CAM_DEBUG_BUS, CAM_DEBUG_TARGET, CAM_DEBUG_LUN);
5131 cam_dflags = CAM_DEBUG_NONE;
5136 periphdriver_init(1);
5138 callout_init(&xsoftc.boot_callout, 1);
5139 callout_reset_sbt(&xsoftc.boot_callout, SBT_1MS * xsoftc.boot_delay, 0,
5140 xpt_boot_delay, NULL, 0);
5141 /* Fire up rescan thread. */
5142 if (kproc_kthread_add(xpt_scanner_thread, NULL, &cam_proc, NULL, 0, 0,
5143 "cam", "scanner")) {
5144 printf("xpt_config: failed to create rescan thread.\n");
5152 xsoftc.buses_to_config++;
5157 xpt_release_boot(void)
5160 xsoftc.buses_to_config--;
5161 if (xsoftc.buses_to_config == 0 && xsoftc.buses_config_done == 0) {
5162 struct xpt_task *task;
5164 xsoftc.buses_config_done = 1;
5166 /* Call manually because we don't have any buses */
5167 task = malloc(sizeof(struct xpt_task), M_CAMXPT, M_NOWAIT);
5169 TASK_INIT(&task->task, 0, xpt_finishconfig_task, task);
5170 taskqueue_enqueue(taskqueue_thread, &task->task);
5177 * If the given device only has one peripheral attached to it, and if that
5178 * peripheral is the passthrough driver, announce it. This insures that the
5179 * user sees some sort of announcement for every peripheral in their system.
5182 xptpassannouncefunc(struct cam_ed *device, void *arg)
5184 struct cam_periph *periph;
5187 for (periph = SLIST_FIRST(&device->periphs), i = 0; periph != NULL;
5188 periph = SLIST_NEXT(periph, periph_links), i++);
5190 periph = SLIST_FIRST(&device->periphs);
5192 && (strncmp(periph->periph_name, "pass", 4) == 0))
5193 xpt_announce_periph(periph, NULL);
5199 xpt_finishconfig_task(void *context, int pending)
5202 periphdriver_init(2);
5204 * Check for devices with no "standard" peripheral driver
5205 * attached. For any devices like that, announce the
5206 * passthrough driver so the user will see something.
5209 xpt_for_all_devices(xptpassannouncefunc, NULL);
5211 /* Release our hook so that the boot can continue. */
5212 config_intrhook_disestablish(xsoftc.xpt_config_hook);
5213 free(xsoftc.xpt_config_hook, M_CAMXPT);
5214 xsoftc.xpt_config_hook = NULL;
5216 free(context, M_CAMXPT);
5220 xpt_register_async(int event, ac_callback_t *cbfunc, void *cbarg,
5221 struct cam_path *path)
5223 struct ccb_setasync csa;
5228 status = xpt_create_path(&path, /*periph*/NULL, CAM_XPT_PATH_ID,
5229 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
5230 if (status != CAM_REQ_CMP)
5232 xpt_path_lock(path);
5236 xpt_setup_ccb(&csa.ccb_h, path, CAM_PRIORITY_NORMAL);
5237 csa.ccb_h.func_code = XPT_SASYNC_CB;
5238 csa.event_enable = event;
5239 csa.callback = cbfunc;
5240 csa.callback_arg = cbarg;
5241 xpt_action((union ccb *)&csa);
5242 status = csa.ccb_h.status;
5244 CAM_DEBUG(csa.ccb_h.path, CAM_DEBUG_TRACE,
5245 ("xpt_register_async: func %p\n", cbfunc));
5248 xpt_path_unlock(path);
5249 xpt_free_path(path);
5252 if ((status == CAM_REQ_CMP) &&
5253 (csa.event_enable & AC_FOUND_DEVICE)) {
5255 * Get this peripheral up to date with all
5256 * the currently existing devices.
5258 xpt_for_all_devices(xptsetasyncfunc, &csa);
5260 if ((status == CAM_REQ_CMP) &&
5261 (csa.event_enable & AC_PATH_REGISTERED)) {
5263 * Get this peripheral up to date with all
5264 * the currently existing buses.
5266 xpt_for_all_busses(xptsetasyncbusfunc, &csa);
5273 xptaction(struct cam_sim *sim, union ccb *work_ccb)
5275 CAM_DEBUG(work_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xptaction\n"));
5277 switch (work_ccb->ccb_h.func_code) {
5278 /* Common cases first */
5279 case XPT_PATH_INQ: /* Path routing inquiry */
5281 struct ccb_pathinq *cpi;
5283 cpi = &work_ccb->cpi;
5284 cpi->version_num = 1; /* XXX??? */
5285 cpi->hba_inquiry = 0;
5286 cpi->target_sprt = 0;
5288 cpi->hba_eng_cnt = 0;
5289 cpi->max_target = 0;
5291 cpi->initiator_id = 0;
5292 strlcpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
5293 strlcpy(cpi->hba_vid, "", HBA_IDLEN);
5294 strlcpy(cpi->dev_name, sim->sim_name, DEV_IDLEN);
5295 cpi->unit_number = sim->unit_number;
5296 cpi->bus_id = sim->bus_id;
5297 cpi->base_transfer_speed = 0;
5298 cpi->protocol = PROTO_UNSPECIFIED;
5299 cpi->protocol_version = PROTO_VERSION_UNSPECIFIED;
5300 cpi->transport = XPORT_UNSPECIFIED;
5301 cpi->transport_version = XPORT_VERSION_UNSPECIFIED;
5302 cpi->ccb_h.status = CAM_REQ_CMP;
5307 work_ccb->ccb_h.status = CAM_REQ_INVALID;
5314 * The xpt as a "controller" has no interrupt sources, so polling
5318 xptpoll(struct cam_sim *sim)
5323 xpt_lock_buses(void)
5325 mtx_lock(&xsoftc.xpt_topo_lock);
5329 xpt_unlock_buses(void)
5331 mtx_unlock(&xsoftc.xpt_topo_lock);
5335 xpt_path_mtx(struct cam_path *path)
5338 return (&path->device->device_mtx);
5342 xpt_done_process(struct ccb_hdr *ccb_h)
5344 struct cam_sim *sim;
5345 struct cam_devq *devq;
5346 struct mtx *mtx = NULL;
5348 #if defined(BUF_TRACKING) || defined(FULL_BUF_TRACKING)
5349 struct ccb_scsiio *csio;
5351 if (ccb_h->func_code == XPT_SCSI_IO) {
5352 csio = &((union ccb *)ccb_h)->csio;
5353 if (csio->bio != NULL)
5354 biotrack(csio->bio, __func__);
5358 if (ccb_h->flags & CAM_HIGH_POWER) {
5359 struct highpowerlist *hphead;
5360 struct cam_ed *device;
5362 mtx_lock(&xsoftc.xpt_highpower_lock);
5363 hphead = &xsoftc.highpowerq;
5365 device = STAILQ_FIRST(hphead);
5368 * Increment the count since this command is done.
5370 xsoftc.num_highpower++;
5373 * Any high powered commands queued up?
5375 if (device != NULL) {
5377 STAILQ_REMOVE_HEAD(hphead, highpowerq_entry);
5378 mtx_unlock(&xsoftc.xpt_highpower_lock);
5380 mtx_lock(&device->sim->devq->send_mtx);
5381 xpt_release_devq_device(device,
5382 /*count*/1, /*runqueue*/TRUE);
5383 mtx_unlock(&device->sim->devq->send_mtx);
5385 mtx_unlock(&xsoftc.xpt_highpower_lock);
5388 sim = ccb_h->path->bus->sim;
5390 if (ccb_h->status & CAM_RELEASE_SIMQ) {
5391 xpt_release_simq(sim, /*run_queue*/FALSE);
5392 ccb_h->status &= ~CAM_RELEASE_SIMQ;
5395 if ((ccb_h->flags & CAM_DEV_QFRZDIS)
5396 && (ccb_h->status & CAM_DEV_QFRZN)) {
5397 xpt_release_devq(ccb_h->path, /*count*/1, /*run_queue*/TRUE);
5398 ccb_h->status &= ~CAM_DEV_QFRZN;
5402 if ((ccb_h->func_code & XPT_FC_USER_CCB) == 0) {
5403 struct cam_ed *dev = ccb_h->path->device;
5405 mtx_lock(&devq->send_mtx);
5406 devq->send_active--;
5407 devq->send_openings++;
5408 cam_ccbq_ccb_done(&dev->ccbq, (union ccb *)ccb_h);
5410 if (((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0
5411 && (dev->ccbq.dev_active == 0))) {
5412 dev->flags &= ~CAM_DEV_REL_ON_QUEUE_EMPTY;
5413 xpt_release_devq_device(dev, /*count*/1,
5414 /*run_queue*/FALSE);
5417 if (((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0
5418 && (ccb_h->status&CAM_STATUS_MASK) != CAM_REQUEUE_REQ)) {
5419 dev->flags &= ~CAM_DEV_REL_ON_COMPLETE;
5420 xpt_release_devq_device(dev, /*count*/1,
5421 /*run_queue*/FALSE);
5424 if (!device_is_queued(dev))
5425 (void)xpt_schedule_devq(devq, dev);
5427 mtx_unlock(&devq->send_mtx);
5429 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0) {
5430 mtx = xpt_path_mtx(ccb_h->path);
5433 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
5434 && (--dev->tag_delay_count == 0))
5435 xpt_start_tags(ccb_h->path);
5439 if ((ccb_h->flags & CAM_UNLOCKED) == 0) {
5441 mtx = xpt_path_mtx(ccb_h->path);
5451 /* Call the peripheral driver's callback */
5452 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX;
5453 (*ccb_h->cbfcnp)(ccb_h->path->periph, (union ccb *)ccb_h);
5459 xpt_done_td(void *arg)
5461 struct cam_doneq *queue = arg;
5462 struct ccb_hdr *ccb_h;
5463 STAILQ_HEAD(, ccb_hdr) doneq;
5465 STAILQ_INIT(&doneq);
5466 mtx_lock(&queue->cam_doneq_mtx);
5468 while (STAILQ_EMPTY(&queue->cam_doneq)) {
5469 queue->cam_doneq_sleep = 1;
5470 msleep(&queue->cam_doneq, &queue->cam_doneq_mtx,
5472 queue->cam_doneq_sleep = 0;
5474 STAILQ_CONCAT(&doneq, &queue->cam_doneq);
5475 mtx_unlock(&queue->cam_doneq_mtx);
5477 THREAD_NO_SLEEPING();
5478 while ((ccb_h = STAILQ_FIRST(&doneq)) != NULL) {
5479 STAILQ_REMOVE_HEAD(&doneq, sim_links.stqe);
5480 xpt_done_process(ccb_h);
5482 THREAD_SLEEPING_OK();
5484 mtx_lock(&queue->cam_doneq_mtx);
5489 camisr_runqueue(void)
5491 struct ccb_hdr *ccb_h;
5492 struct cam_doneq *queue;
5495 /* Process global queues. */
5496 for (i = 0; i < cam_num_doneqs; i++) {
5497 queue = &cam_doneqs[i];
5498 mtx_lock(&queue->cam_doneq_mtx);
5499 while ((ccb_h = STAILQ_FIRST(&queue->cam_doneq)) != NULL) {
5500 STAILQ_REMOVE_HEAD(&queue->cam_doneq, sim_links.stqe);
5501 mtx_unlock(&queue->cam_doneq_mtx);
5502 xpt_done_process(ccb_h);
5503 mtx_lock(&queue->cam_doneq_mtx);
5505 mtx_unlock(&queue->cam_doneq_mtx);
5515 static struct kv map[] = {
5516 { XPT_NOOP, "XPT_NOOP" },
5517 { XPT_SCSI_IO, "XPT_SCSI_IO" },
5518 { XPT_GDEV_TYPE, "XPT_GDEV_TYPE" },
5519 { XPT_GDEVLIST, "XPT_GDEVLIST" },
5520 { XPT_PATH_INQ, "XPT_PATH_INQ" },
5521 { XPT_REL_SIMQ, "XPT_REL_SIMQ" },
5522 { XPT_SASYNC_CB, "XPT_SASYNC_CB" },
5523 { XPT_SDEV_TYPE, "XPT_SDEV_TYPE" },
5524 { XPT_SCAN_BUS, "XPT_SCAN_BUS" },
5525 { XPT_DEV_MATCH, "XPT_DEV_MATCH" },
5526 { XPT_DEBUG, "XPT_DEBUG" },
5527 { XPT_PATH_STATS, "XPT_PATH_STATS" },
5528 { XPT_GDEV_STATS, "XPT_GDEV_STATS" },
5529 { XPT_DEV_ADVINFO, "XPT_DEV_ADVINFO" },
5530 { XPT_ASYNC, "XPT_ASYNC" },
5531 { XPT_ABORT, "XPT_ABORT" },
5532 { XPT_RESET_BUS, "XPT_RESET_BUS" },
5533 { XPT_RESET_DEV, "XPT_RESET_DEV" },
5534 { XPT_TERM_IO, "XPT_TERM_IO" },
5535 { XPT_SCAN_LUN, "XPT_SCAN_LUN" },
5536 { XPT_GET_TRAN_SETTINGS, "XPT_GET_TRAN_SETTINGS" },
5537 { XPT_SET_TRAN_SETTINGS, "XPT_SET_TRAN_SETTINGS" },
5538 { XPT_CALC_GEOMETRY, "XPT_CALC_GEOMETRY" },
5539 { XPT_ATA_IO, "XPT_ATA_IO" },
5540 { XPT_GET_SIM_KNOB, "XPT_GET_SIM_KNOB" },
5541 { XPT_SET_SIM_KNOB, "XPT_SET_SIM_KNOB" },
5542 { XPT_NVME_IO, "XPT_NVME_IO" },
5543 { XPT_MMCSD_IO, "XPT_MMCSD_IO" },
5544 { XPT_SMP_IO, "XPT_SMP_IO" },
5545 { XPT_SCAN_TGT, "XPT_SCAN_TGT" },
5546 { XPT_ENG_INQ, "XPT_ENG_INQ" },
5547 { XPT_ENG_EXEC, "XPT_ENG_EXEC" },
5548 { XPT_EN_LUN, "XPT_EN_LUN" },
5549 { XPT_TARGET_IO, "XPT_TARGET_IO" },
5550 { XPT_ACCEPT_TARGET_IO, "XPT_ACCEPT_TARGET_IO" },
5551 { XPT_CONT_TARGET_IO, "XPT_CONT_TARGET_IO" },
5552 { XPT_IMMED_NOTIFY, "XPT_IMMED_NOTIFY" },
5553 { XPT_NOTIFY_ACK, "XPT_NOTIFY_ACK" },
5554 { XPT_IMMEDIATE_NOTIFY, "XPT_IMMEDIATE_NOTIFY" },
5555 { XPT_NOTIFY_ACKNOWLEDGE, "XPT_NOTIFY_ACKNOWLEDGE" },
5560 xpt_action_name(uint32_t action)
5562 static char buffer[32]; /* Only for unknown messages -- racy */
5563 struct kv *walker = map;
5565 while (walker->name != NULL) {
5566 if (walker->v == action)
5567 return (walker->name);
5571 snprintf(buffer, sizeof(buffer), "%#x", action);