2 * Implementation of the Common Access Method Transport (XPT) layer.
4 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
6 * Copyright (c) 1997, 1998, 1999 Justin T. Gibbs.
7 * Copyright (c) 1997, 1998, 1999 Kenneth D. Merry.
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions, and the following disclaimer,
15 * without modification, immediately at the beginning of the file.
16 * 2. The name of the author may not be used to endorse or promote products
17 * derived from this software without specific prior written permission.
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
23 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 #include "opt_printf.h"
34 #include <sys/cdefs.h>
35 __FBSDID("$FreeBSD$");
37 #include <sys/param.h>
40 #include <sys/systm.h>
41 #include <sys/types.h>
42 #include <sys/malloc.h>
43 #include <sys/kernel.h>
46 #include <sys/fcntl.h>
50 #include <sys/taskqueue.h>
53 #include <sys/mutex.h>
54 #include <sys/sysctl.h>
55 #include <sys/kthread.h>
58 #include <cam/cam_ccb.h>
59 #include <cam/cam_iosched.h>
60 #include <cam/cam_periph.h>
61 #include <cam/cam_queue.h>
62 #include <cam/cam_sim.h>
63 #include <cam/cam_xpt.h>
64 #include <cam/cam_xpt_sim.h>
65 #include <cam/cam_xpt_periph.h>
66 #include <cam/cam_xpt_internal.h>
67 #include <cam/cam_debug.h>
68 #include <cam/cam_compat.h>
70 #include <cam/scsi/scsi_all.h>
71 #include <cam/scsi/scsi_message.h>
72 #include <cam/scsi/scsi_pass.h>
74 #include <machine/stdarg.h> /* for xpt_print below */
78 /* Wild guess based on not wanting to grow the stack too much */
79 #define XPT_PRINT_MAXLEN 512
80 #ifdef PRINTF_BUFR_SIZE
81 #define XPT_PRINT_LEN PRINTF_BUFR_SIZE
83 #define XPT_PRINT_LEN 128
85 _Static_assert(XPT_PRINT_LEN <= XPT_PRINT_MAXLEN, "XPT_PRINT_LEN is too large");
88 * This is the maximum number of high powered commands (e.g. start unit)
89 * that can be outstanding at a particular time.
91 #ifndef CAM_MAX_HIGHPOWER
92 #define CAM_MAX_HIGHPOWER 4
95 /* Datastructures internal to the xpt layer */
96 MALLOC_DEFINE(M_CAMXPT, "CAM XPT", "CAM XPT buffers");
97 MALLOC_DEFINE(M_CAMDEV, "CAM DEV", "CAM devices");
98 MALLOC_DEFINE(M_CAMCCB, "CAM CCB", "CAM CCBs");
99 MALLOC_DEFINE(M_CAMPATH, "CAM path", "CAM paths");
102 uint32_t xpt_generation;
104 /* number of high powered commands that can go through right now */
105 struct mtx xpt_highpower_lock;
106 STAILQ_HEAD(highpowerlist, cam_ed) highpowerq;
109 /* queue for handling async rescan requests. */
110 TAILQ_HEAD(, ccb_hdr) ccb_scanq;
112 int buses_config_done;
118 * N.B., "busses" is an archaic spelling of "buses". In new code
119 * "buses" is preferred.
121 TAILQ_HEAD(,cam_eb) xpt_busses;
122 u_int bus_generation;
125 struct callout boot_callout;
126 struct task boot_task;
127 struct root_hold_token xpt_rootmount;
129 struct mtx xpt_topo_lock;
130 struct taskqueue *xpt_taskq;
135 DM_RET_FLAG_MASK = 0x0f,
138 DM_RET_DESCEND = 0x20,
140 DM_RET_ACTION_MASK = 0xf0
148 } xpt_traverse_depth;
150 struct xpt_traverse_config {
151 xpt_traverse_depth depth;
156 typedef int xpt_busfunc_t (struct cam_eb *bus, void *arg);
157 typedef int xpt_targetfunc_t (struct cam_et *target, void *arg);
158 typedef int xpt_devicefunc_t (struct cam_ed *device, void *arg);
159 typedef int xpt_periphfunc_t (struct cam_periph *periph, void *arg);
160 typedef int xpt_pdrvfunc_t (struct periph_driver **pdrv, void *arg);
162 /* Transport layer configuration information */
163 static struct xpt_softc xsoftc;
165 MTX_SYSINIT(xpt_topo_init, &xsoftc.xpt_topo_lock, "XPT topology lock", MTX_DEF);
167 SYSCTL_INT(_kern_cam, OID_AUTO, boot_delay, CTLFLAG_RDTUN,
168 &xsoftc.boot_delay, 0, "Bus registration wait time");
169 SYSCTL_UINT(_kern_cam, OID_AUTO, xpt_generation, CTLFLAG_RD,
170 &xsoftc.xpt_generation, 0, "CAM peripheral generation count");
171 SYSCTL_INT(_kern_cam, OID_AUTO, announce_nosbuf, CTLFLAG_RWTUN,
172 &xsoftc.announce_nosbuf, 0, "Don't use sbuf for announcements");
175 struct mtx_padalign cam_doneq_mtx;
176 STAILQ_HEAD(, ccb_hdr) cam_doneq;
180 static struct cam_doneq cam_doneqs[MAXCPU];
181 static u_int __read_mostly cam_num_doneqs;
182 static struct proc *cam_proc;
184 SYSCTL_INT(_kern_cam, OID_AUTO, num_doneqs, CTLFLAG_RDTUN,
185 &cam_num_doneqs, 0, "Number of completion queues/threads");
187 struct cam_periph *xpt_periph;
189 static periph_init_t xpt_periph_init;
191 static struct periph_driver xpt_driver =
193 xpt_periph_init, "xpt",
194 TAILQ_HEAD_INITIALIZER(xpt_driver.units), /* generation */ 0,
198 PERIPHDRIVER_DECLARE(xpt, xpt_driver);
200 static d_open_t xptopen;
201 static d_close_t xptclose;
202 static d_ioctl_t xptioctl;
203 static d_ioctl_t xptdoioctl;
205 static struct cdevsw xpt_cdevsw = {
206 .d_version = D_VERSION,
214 /* Storage for debugging datastructures */
215 struct cam_path *cam_dpath;
216 u_int32_t __read_mostly cam_dflags = CAM_DEBUG_FLAGS;
217 SYSCTL_UINT(_kern_cam, OID_AUTO, dflags, CTLFLAG_RWTUN,
218 &cam_dflags, 0, "Enabled debug flags");
219 u_int32_t cam_debug_delay = CAM_DEBUG_DELAY;
220 SYSCTL_UINT(_kern_cam, OID_AUTO, debug_delay, CTLFLAG_RWTUN,
221 &cam_debug_delay, 0, "Delay in us after each debug message");
223 /* Our boot-time initialization hook */
224 static int cam_module_event_handler(module_t, int /*modeventtype_t*/, void *);
226 static moduledata_t cam_moduledata = {
228 cam_module_event_handler,
232 static int xpt_init(void *);
234 DECLARE_MODULE(cam, cam_moduledata, SI_SUB_CONFIGURE, SI_ORDER_SECOND);
235 MODULE_VERSION(cam, 1);
237 static void xpt_async_bcast(struct async_list *async_head,
238 u_int32_t async_code,
239 struct cam_path *path,
241 static path_id_t xptnextfreepathid(void);
242 static path_id_t xptpathid(const char *sim_name, int sim_unit, int sim_bus);
243 static union ccb *xpt_get_ccb(struct cam_periph *periph);
244 static union ccb *xpt_get_ccb_nowait(struct cam_periph *periph);
245 static void xpt_run_allocq(struct cam_periph *periph, int sleep);
246 static void xpt_run_allocq_task(void *context, int pending);
247 static void xpt_run_devq(struct cam_devq *devq);
248 static callout_func_t xpt_release_devq_timeout;
249 static void xpt_acquire_bus(struct cam_eb *bus);
250 static void xpt_release_bus(struct cam_eb *bus);
251 static uint32_t xpt_freeze_devq_device(struct cam_ed *dev, u_int count);
252 static int xpt_release_devq_device(struct cam_ed *dev, u_int count,
254 static struct cam_et*
255 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id);
256 static void xpt_acquire_target(struct cam_et *target);
257 static void xpt_release_target(struct cam_et *target);
258 static struct cam_eb*
259 xpt_find_bus(path_id_t path_id);
260 static struct cam_et*
261 xpt_find_target(struct cam_eb *bus, target_id_t target_id);
262 static struct cam_ed*
263 xpt_find_device(struct cam_et *target, lun_id_t lun_id);
264 static void xpt_config(void *arg);
265 static void xpt_hold_boot_locked(void);
266 static int xpt_schedule_dev(struct camq *queue, cam_pinfo *dev_pinfo,
267 u_int32_t new_priority);
268 static xpt_devicefunc_t xptpassannouncefunc;
269 static void xptaction(struct cam_sim *sim, union ccb *work_ccb);
270 static void xptpoll(struct cam_sim *sim);
271 static void camisr_runqueue(void);
272 static void xpt_done_process(struct ccb_hdr *ccb_h);
273 static void xpt_done_td(void *);
274 static dev_match_ret xptbusmatch(struct dev_match_pattern *patterns,
275 u_int num_patterns, struct cam_eb *bus);
276 static dev_match_ret xptdevicematch(struct dev_match_pattern *patterns,
278 struct cam_ed *device);
279 static dev_match_ret xptperiphmatch(struct dev_match_pattern *patterns,
281 struct cam_periph *periph);
282 static xpt_busfunc_t xptedtbusfunc;
283 static xpt_targetfunc_t xptedttargetfunc;
284 static xpt_devicefunc_t xptedtdevicefunc;
285 static xpt_periphfunc_t xptedtperiphfunc;
286 static xpt_pdrvfunc_t xptplistpdrvfunc;
287 static xpt_periphfunc_t xptplistperiphfunc;
288 static int xptedtmatch(struct ccb_dev_match *cdm);
289 static int xptperiphlistmatch(struct ccb_dev_match *cdm);
290 static int xptbustraverse(struct cam_eb *start_bus,
291 xpt_busfunc_t *tr_func, void *arg);
292 static int xpttargettraverse(struct cam_eb *bus,
293 struct cam_et *start_target,
294 xpt_targetfunc_t *tr_func, void *arg);
295 static int xptdevicetraverse(struct cam_et *target,
296 struct cam_ed *start_device,
297 xpt_devicefunc_t *tr_func, void *arg);
298 static int xptperiphtraverse(struct cam_ed *device,
299 struct cam_periph *start_periph,
300 xpt_periphfunc_t *tr_func, void *arg);
301 static int xptpdrvtraverse(struct periph_driver **start_pdrv,
302 xpt_pdrvfunc_t *tr_func, void *arg);
303 static int xptpdperiphtraverse(struct periph_driver **pdrv,
304 struct cam_periph *start_periph,
305 xpt_periphfunc_t *tr_func,
307 static xpt_busfunc_t xptdefbusfunc;
308 static xpt_targetfunc_t xptdeftargetfunc;
309 static xpt_devicefunc_t xptdefdevicefunc;
310 static xpt_periphfunc_t xptdefperiphfunc;
311 static void xpt_finishconfig_task(void *context, int pending);
312 static void xpt_dev_async_default(u_int32_t async_code,
314 struct cam_et *target,
315 struct cam_ed *device,
317 static struct cam_ed * xpt_alloc_device_default(struct cam_eb *bus,
318 struct cam_et *target,
320 static xpt_devicefunc_t xptsetasyncfunc;
321 static xpt_busfunc_t xptsetasyncbusfunc;
322 static cam_status xptregister(struct cam_periph *periph,
326 xpt_schedule_devq(struct cam_devq *devq, struct cam_ed *dev)
330 mtx_assert(&devq->send_mtx, MA_OWNED);
331 if ((dev->ccbq.queue.entries > 0) &&
332 (dev->ccbq.dev_openings > 0) &&
333 (dev->ccbq.queue.qfrozen_cnt == 0)) {
335 * The priority of a device waiting for controller
336 * resources is that of the highest priority CCB
340 xpt_schedule_dev(&devq->send_queue,
342 CAMQ_GET_PRIO(&dev->ccbq.queue));
350 device_is_queued(struct cam_ed *device)
352 return (device->devq_entry.index != CAM_UNQUEUED_INDEX);
356 xpt_periph_init(void)
358 make_dev(&xpt_cdevsw, 0, UID_ROOT, GID_OPERATOR, 0600, "xpt0");
362 xptopen(struct cdev *dev, int flags, int fmt, struct thread *td)
366 * Only allow read-write access.
368 if (((flags & FWRITE) == 0) || ((flags & FREAD) == 0))
372 * We don't allow nonblocking access.
374 if ((flags & O_NONBLOCK) != 0) {
375 printf("%s: can't do nonblocking access\n", devtoname(dev));
383 xptclose(struct cdev *dev, int flag, int fmt, struct thread *td)
390 * Don't automatically grab the xpt softc lock here even though this is going
391 * through the xpt device. The xpt device is really just a back door for
392 * accessing other devices and SIMs, so the right thing to do is to grab
393 * the appropriate SIM lock once the bus/SIM is located.
396 xptioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
400 if ((error = xptdoioctl(dev, cmd, addr, flag, td)) == ENOTTY) {
401 error = cam_compat_ioctl(dev, cmd, addr, flag, td, xptdoioctl);
407 xptdoioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
415 * For the transport layer CAMIOCOMMAND ioctl, we really only want
416 * to accept CCB types that don't quite make sense to send through a
417 * passthrough driver. XPT_PATH_INQ is an exception to this, as stated
425 inccb = (union ccb *)addr;
426 #if defined(BUF_TRACKING) || defined(FULL_BUF_TRACKING)
427 if (inccb->ccb_h.func_code == XPT_SCSI_IO)
428 inccb->csio.bio = NULL;
431 if (inccb->ccb_h.flags & CAM_UNLOCKED)
434 bus = xpt_find_bus(inccb->ccb_h.path_id);
438 switch (inccb->ccb_h.func_code) {
441 if (inccb->ccb_h.target_id != CAM_TARGET_WILDCARD ||
442 inccb->ccb_h.target_lun != CAM_LUN_WILDCARD) {
443 xpt_release_bus(bus);
448 if (inccb->ccb_h.target_id == CAM_TARGET_WILDCARD ||
449 inccb->ccb_h.target_lun != CAM_LUN_WILDCARD) {
450 xpt_release_bus(bus);
458 switch(inccb->ccb_h.func_code) {
466 ccb = xpt_alloc_ccb();
469 * Create a path using the bus, target, and lun the
472 if (xpt_create_path(&ccb->ccb_h.path, NULL,
473 inccb->ccb_h.path_id,
474 inccb->ccb_h.target_id,
475 inccb->ccb_h.target_lun) !=
481 /* Ensure all of our fields are correct */
482 xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path,
483 inccb->ccb_h.pinfo.priority);
484 xpt_merge_ccb(ccb, inccb);
485 xpt_path_lock(ccb->ccb_h.path);
486 cam_periph_runccb(ccb, NULL, 0, 0, NULL);
487 xpt_path_unlock(ccb->ccb_h.path);
488 bcopy(ccb, inccb, sizeof(union ccb));
489 xpt_free_path(ccb->ccb_h.path);
497 * This is an immediate CCB, so it's okay to
498 * allocate it on the stack.
502 * Create a path using the bus, target, and lun the
505 if (xpt_create_path(&ccb.ccb_h.path, NULL,
506 inccb->ccb_h.path_id,
507 inccb->ccb_h.target_id,
508 inccb->ccb_h.target_lun) !=
513 /* Ensure all of our fields are correct */
514 xpt_setup_ccb(&ccb.ccb_h, ccb.ccb_h.path,
515 inccb->ccb_h.pinfo.priority);
516 xpt_merge_ccb(&ccb, inccb);
518 bcopy(&ccb, inccb, sizeof(union ccb));
519 xpt_free_path(ccb.ccb_h.path);
522 case XPT_DEV_MATCH: {
523 struct cam_periph_map_info mapinfo;
524 struct cam_path *old_path;
527 * We can't deal with physical addresses for this
528 * type of transaction.
530 if ((inccb->ccb_h.flags & CAM_DATA_MASK) !=
537 * Save this in case the caller had it set to
538 * something in particular.
540 old_path = inccb->ccb_h.path;
543 * We really don't need a path for the matching
544 * code. The path is needed because of the
545 * debugging statements in xpt_action(). They
546 * assume that the CCB has a valid path.
548 inccb->ccb_h.path = xpt_periph->path;
550 bzero(&mapinfo, sizeof(mapinfo));
553 * Map the pattern and match buffers into kernel
554 * virtual address space.
556 error = cam_periph_mapmem(inccb, &mapinfo, maxphys);
559 inccb->ccb_h.path = old_path;
564 * This is an immediate CCB, we can send it on directly.
569 * Map the buffers back into user space.
571 cam_periph_unmapmem(inccb, &mapinfo);
573 inccb->ccb_h.path = old_path;
582 xpt_release_bus(bus);
586 * This is the getpassthru ioctl. It takes a XPT_GDEVLIST ccb as input,
587 * with the periphal driver name and unit name filled in. The other
588 * fields don't really matter as input. The passthrough driver name
589 * ("pass"), and unit number are passed back in the ccb. The current
590 * device generation number, and the index into the device peripheral
591 * driver list, and the status are also passed back. Note that
592 * since we do everything in one pass, unlike the XPT_GDEVLIST ccb,
593 * we never return a status of CAM_GDEVLIST_LIST_CHANGED. It is
594 * (or rather should be) impossible for the device peripheral driver
595 * list to change since we look at the whole thing in one pass, and
596 * we do it with lock protection.
599 case CAMGETPASSTHRU: {
601 struct cam_periph *periph;
602 struct periph_driver **p_drv;
605 int base_periph_found;
607 ccb = (union ccb *)addr;
608 unit = ccb->cgdl.unit_number;
609 name = ccb->cgdl.periph_name;
610 base_periph_found = 0;
611 #if defined(BUF_TRACKING) || defined(FULL_BUF_TRACKING)
612 if (ccb->ccb_h.func_code == XPT_SCSI_IO)
613 ccb->csio.bio = NULL;
617 * Sanity check -- make sure we don't get a null peripheral
620 if (*ccb->cgdl.periph_name == '\0') {
625 /* Keep the list from changing while we traverse it */
628 /* first find our driver in the list of drivers */
629 for (p_drv = periph_drivers; *p_drv != NULL; p_drv++)
630 if (strcmp((*p_drv)->driver_name, name) == 0)
633 if (*p_drv == NULL) {
635 ccb->ccb_h.status = CAM_REQ_CMP_ERR;
636 ccb->cgdl.status = CAM_GDEVLIST_ERROR;
637 *ccb->cgdl.periph_name = '\0';
638 ccb->cgdl.unit_number = 0;
644 * Run through every peripheral instance of this driver
645 * and check to see whether it matches the unit passed
646 * in by the user. If it does, get out of the loops and
647 * find the passthrough driver associated with that
650 for (periph = TAILQ_FIRST(&(*p_drv)->units); periph != NULL;
651 periph = TAILQ_NEXT(periph, unit_links)) {
652 if (periph->unit_number == unit)
656 * If we found the peripheral driver that the user passed
657 * in, go through all of the peripheral drivers for that
658 * particular device and look for a passthrough driver.
660 if (periph != NULL) {
661 struct cam_ed *device;
664 base_periph_found = 1;
665 device = periph->path->device;
666 for (i = 0, periph = SLIST_FIRST(&device->periphs);
668 periph = SLIST_NEXT(periph, periph_links), i++) {
670 * Check to see whether we have a
671 * passthrough device or not.
673 if (strcmp(periph->periph_name, "pass") == 0) {
675 * Fill in the getdevlist fields.
677 strlcpy(ccb->cgdl.periph_name,
679 sizeof(ccb->cgdl.periph_name));
680 ccb->cgdl.unit_number =
682 if (SLIST_NEXT(periph, periph_links))
684 CAM_GDEVLIST_MORE_DEVS;
687 CAM_GDEVLIST_LAST_DEVICE;
688 ccb->cgdl.generation =
692 * Fill in some CCB header fields
693 * that the user may want.
696 periph->path->bus->path_id;
697 ccb->ccb_h.target_id =
698 periph->path->target->target_id;
699 ccb->ccb_h.target_lun =
700 periph->path->device->lun_id;
701 ccb->ccb_h.status = CAM_REQ_CMP;
708 * If the periph is null here, one of two things has
709 * happened. The first possibility is that we couldn't
710 * find the unit number of the particular peripheral driver
711 * that the user is asking about. e.g. the user asks for
712 * the passthrough driver for "da11". We find the list of
713 * "da" peripherals all right, but there is no unit 11.
714 * The other possibility is that we went through the list
715 * of peripheral drivers attached to the device structure,
716 * but didn't find one with the name "pass". Either way,
717 * we return ENOENT, since we couldn't find something.
719 if (periph == NULL) {
720 ccb->ccb_h.status = CAM_REQ_CMP_ERR;
721 ccb->cgdl.status = CAM_GDEVLIST_ERROR;
722 *ccb->cgdl.periph_name = '\0';
723 ccb->cgdl.unit_number = 0;
726 * It is unfortunate that this is even necessary,
727 * but there are many, many clueless users out there.
728 * If this is true, the user is looking for the
729 * passthrough driver, but doesn't have one in his
732 if (base_periph_found == 1) {
733 printf("xptioctl: pass driver is not in the "
735 printf("xptioctl: put \"device pass\" in "
736 "your kernel config file\n");
751 cam_module_event_handler(module_t mod, int what, void *arg)
757 if ((error = xpt_init(NULL)) != 0)
769 static struct xpt_proto *
770 xpt_proto_find(cam_proto proto)
772 struct xpt_proto **pp;
774 SET_FOREACH(pp, cam_xpt_proto_set) {
775 if ((*pp)->proto == proto)
783 xpt_rescan_done(struct cam_periph *periph, union ccb *done_ccb)
786 if (done_ccb->ccb_h.ppriv_ptr1 == NULL) {
787 xpt_free_path(done_ccb->ccb_h.path);
788 xpt_free_ccb(done_ccb);
790 done_ccb->ccb_h.cbfcnp = done_ccb->ccb_h.ppriv_ptr1;
791 (*done_ccb->ccb_h.cbfcnp)(periph, done_ccb);
796 /* thread to handle bus rescans */
798 xpt_scanner_thread(void *dummy)
802 struct cam_ed *device;
806 if (TAILQ_EMPTY(&xsoftc.ccb_scanq))
807 msleep(&xsoftc.ccb_scanq, &xsoftc.xpt_topo_lock, PRIBIO,
809 if ((ccb = (union ccb *)TAILQ_FIRST(&xsoftc.ccb_scanq)) != NULL) {
810 TAILQ_REMOVE(&xsoftc.ccb_scanq, &ccb->ccb_h, sim_links.tqe);
814 * We need to lock the device's mutex which we use as
815 * the path mutex. We can't do it directly because the
816 * cam_path in the ccb may wind up going away because
817 * the path lock may be dropped and the path retired in
818 * the completion callback. We do this directly to keep
819 * the reference counts in cam_path sane. We also have
820 * to copy the device pointer because ccb_h.path may
821 * be freed in the callback.
823 mtx = xpt_path_mtx(ccb->ccb_h.path);
824 device = ccb->ccb_h.path->device;
825 xpt_acquire_device(device);
829 xpt_release_device(device);
837 xpt_rescan(union ccb *ccb)
841 /* Prepare request */
842 if (ccb->ccb_h.path->target->target_id == CAM_TARGET_WILDCARD &&
843 ccb->ccb_h.path->device->lun_id == CAM_LUN_WILDCARD)
844 ccb->ccb_h.func_code = XPT_SCAN_BUS;
845 else 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_TGT;
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_LUN;
852 xpt_print(ccb->ccb_h.path, "illegal scan path\n");
853 xpt_free_path(ccb->ccb_h.path);
857 CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE,
858 ("xpt_rescan: func %#x %s\n", ccb->ccb_h.func_code,
859 xpt_action_name(ccb->ccb_h.func_code)));
861 ccb->ccb_h.ppriv_ptr1 = ccb->ccb_h.cbfcnp;
862 ccb->ccb_h.cbfcnp = xpt_rescan_done;
863 xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path, CAM_PRIORITY_XPT);
864 /* Don't make duplicate entries for the same paths. */
866 if (ccb->ccb_h.ppriv_ptr1 == NULL) {
867 TAILQ_FOREACH(hdr, &xsoftc.ccb_scanq, sim_links.tqe) {
868 if (xpt_path_comp(hdr->path, ccb->ccb_h.path) == 0) {
869 wakeup(&xsoftc.ccb_scanq);
871 xpt_print(ccb->ccb_h.path, "rescan already queued\n");
872 xpt_free_path(ccb->ccb_h.path);
878 TAILQ_INSERT_TAIL(&xsoftc.ccb_scanq, &ccb->ccb_h, sim_links.tqe);
879 xpt_hold_boot_locked();
880 wakeup(&xsoftc.ccb_scanq);
884 /* Functions accessed by the peripheral drivers */
886 xpt_init(void *dummy)
888 struct cam_sim *xpt_sim;
889 struct cam_path *path;
890 struct cam_devq *devq;
894 TAILQ_INIT(&xsoftc.xpt_busses);
895 TAILQ_INIT(&xsoftc.ccb_scanq);
896 STAILQ_INIT(&xsoftc.highpowerq);
897 xsoftc.num_highpower = CAM_MAX_HIGHPOWER;
899 mtx_init(&xsoftc.xpt_highpower_lock, "XPT highpower lock", NULL, MTX_DEF);
900 xsoftc.xpt_taskq = taskqueue_create("CAM XPT task", M_WAITOK,
901 taskqueue_thread_enqueue, /*context*/&xsoftc.xpt_taskq);
903 #ifdef CAM_BOOT_DELAY
905 * Override this value at compile time to assist our users
906 * who don't use loader to boot a kernel.
908 xsoftc.boot_delay = CAM_BOOT_DELAY;
912 * The xpt layer is, itself, the equivalent of a SIM.
913 * Allow 16 ccbs in the ccb pool for it. This should
914 * give decent parallelism when we probe buses and
915 * perform other XPT functions.
917 devq = cam_simq_alloc(16);
918 xpt_sim = cam_sim_alloc(xptaction,
924 /*max_dev_transactions*/0,
925 /*max_tagged_dev_transactions*/0,
930 if ((status = xpt_bus_register(xpt_sim, NULL, 0)) != CAM_SUCCESS) {
931 printf("xpt_init: xpt_bus_register failed with status %#x,"
932 " failing attach\n", status);
937 * Looking at the XPT from the SIM layer, the XPT is
938 * the equivalent of a peripheral driver. Allocate
939 * a peripheral driver entry for us.
941 if ((status = xpt_create_path(&path, NULL, CAM_XPT_PATH_ID,
943 CAM_LUN_WILDCARD)) != CAM_REQ_CMP) {
944 printf("xpt_init: xpt_create_path failed with status %#x,"
945 " failing attach\n", status);
949 cam_periph_alloc(xptregister, NULL, NULL, NULL, "xpt", CAM_PERIPH_BIO,
950 path, NULL, 0, xpt_sim);
951 xpt_path_unlock(path);
954 if (cam_num_doneqs < 1)
955 cam_num_doneqs = 1 + mp_ncpus / 6;
956 else if (cam_num_doneqs > MAXCPU)
957 cam_num_doneqs = MAXCPU;
958 for (i = 0; i < cam_num_doneqs; i++) {
959 mtx_init(&cam_doneqs[i].cam_doneq_mtx, "CAM doneq", NULL,
961 STAILQ_INIT(&cam_doneqs[i].cam_doneq);
962 error = kproc_kthread_add(xpt_done_td, &cam_doneqs[i],
963 &cam_proc, NULL, 0, 0, "cam", "doneq%d", i);
969 if (cam_num_doneqs < 1) {
970 printf("xpt_init: Cannot init completion queues "
971 "- failing attach\n");
976 * Register a callback for when interrupts are enabled.
978 config_intrhook_oneshot(xpt_config, NULL);
984 xptregister(struct cam_periph *periph, void *arg)
986 struct cam_sim *xpt_sim;
988 if (periph == NULL) {
989 printf("xptregister: periph was NULL!!\n");
990 return(CAM_REQ_CMP_ERR);
993 xpt_sim = (struct cam_sim *)arg;
994 xpt_sim->softc = periph;
996 periph->softc = NULL;
1002 xpt_add_periph(struct cam_periph *periph)
1004 struct cam_ed *device;
1007 TASK_INIT(&periph->periph_run_task, 0, xpt_run_allocq_task, periph);
1008 device = periph->path->device;
1009 status = CAM_REQ_CMP;
1010 if (device != NULL) {
1011 mtx_lock(&device->target->bus->eb_mtx);
1012 device->generation++;
1013 SLIST_INSERT_HEAD(&device->periphs, periph, periph_links);
1014 mtx_unlock(&device->target->bus->eb_mtx);
1015 atomic_add_32(&xsoftc.xpt_generation, 1);
1022 xpt_remove_periph(struct cam_periph *periph)
1024 struct cam_ed *device;
1026 device = periph->path->device;
1027 if (device != NULL) {
1028 mtx_lock(&device->target->bus->eb_mtx);
1029 device->generation++;
1030 SLIST_REMOVE(&device->periphs, periph, cam_periph, periph_links);
1031 mtx_unlock(&device->target->bus->eb_mtx);
1032 atomic_add_32(&xsoftc.xpt_generation, 1);
1037 xpt_announce_periph(struct cam_periph *periph, char *announce_string)
1039 struct cam_path *path = periph->path;
1040 struct xpt_proto *proto;
1042 cam_periph_assert(periph, MA_OWNED);
1043 periph->flags |= CAM_PERIPH_ANNOUNCED;
1045 printf("%s%d at %s%d bus %d scbus%d target %d lun %jx\n",
1046 periph->periph_name, periph->unit_number,
1047 path->bus->sim->sim_name,
1048 path->bus->sim->unit_number,
1049 path->bus->sim->bus_id,
1051 path->target->target_id,
1052 (uintmax_t)path->device->lun_id);
1053 printf("%s%d: ", periph->periph_name, periph->unit_number);
1054 proto = xpt_proto_find(path->device->protocol);
1056 proto->ops->announce(path->device);
1058 printf("%s%d: Unknown protocol device %d\n",
1059 periph->periph_name, periph->unit_number,
1060 path->device->protocol);
1061 if (path->device->serial_num_len > 0) {
1062 /* Don't wrap the screen - print only the first 60 chars */
1063 printf("%s%d: Serial Number %.60s\n", periph->periph_name,
1064 periph->unit_number, path->device->serial_num);
1066 /* Announce transport details. */
1067 path->bus->xport->ops->announce(periph);
1068 /* Announce command queueing. */
1069 if (path->device->inq_flags & SID_CmdQue
1070 || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) {
1071 printf("%s%d: Command Queueing enabled\n",
1072 periph->periph_name, periph->unit_number);
1074 /* Announce caller's details if they've passed in. */
1075 if (announce_string != NULL)
1076 printf("%s%d: %s\n", periph->periph_name,
1077 periph->unit_number, announce_string);
1081 xpt_announce_periph_sbuf(struct cam_periph *periph, struct sbuf *sb,
1082 char *announce_string)
1084 struct cam_path *path = periph->path;
1085 struct xpt_proto *proto;
1087 cam_periph_assert(periph, MA_OWNED);
1088 periph->flags |= CAM_PERIPH_ANNOUNCED;
1090 /* Fall back to the non-sbuf method if necessary */
1091 if (xsoftc.announce_nosbuf != 0) {
1092 xpt_announce_periph(periph, announce_string);
1095 proto = xpt_proto_find(path->device->protocol);
1096 if (((proto != NULL) && (proto->ops->announce_sbuf == NULL)) ||
1097 (path->bus->xport->ops->announce_sbuf == NULL)) {
1098 xpt_announce_periph(periph, announce_string);
1102 sbuf_printf(sb, "%s%d at %s%d bus %d scbus%d target %d lun %jx\n",
1103 periph->periph_name, periph->unit_number,
1104 path->bus->sim->sim_name,
1105 path->bus->sim->unit_number,
1106 path->bus->sim->bus_id,
1108 path->target->target_id,
1109 (uintmax_t)path->device->lun_id);
1110 sbuf_printf(sb, "%s%d: ", periph->periph_name, periph->unit_number);
1113 proto->ops->announce_sbuf(path->device, sb);
1115 sbuf_printf(sb, "%s%d: Unknown protocol device %d\n",
1116 periph->periph_name, periph->unit_number,
1117 path->device->protocol);
1118 if (path->device->serial_num_len > 0) {
1119 /* Don't wrap the screen - print only the first 60 chars */
1120 sbuf_printf(sb, "%s%d: Serial Number %.60s\n",
1121 periph->periph_name, periph->unit_number,
1122 path->device->serial_num);
1124 /* Announce transport details. */
1125 path->bus->xport->ops->announce_sbuf(periph, sb);
1126 /* Announce command queueing. */
1127 if (path->device->inq_flags & SID_CmdQue
1128 || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) {
1129 sbuf_printf(sb, "%s%d: Command Queueing enabled\n",
1130 periph->periph_name, periph->unit_number);
1132 /* Announce caller's details if they've passed in. */
1133 if (announce_string != NULL)
1134 sbuf_printf(sb, "%s%d: %s\n", periph->periph_name,
1135 periph->unit_number, announce_string);
1139 xpt_announce_quirks(struct cam_periph *periph, int quirks, char *bit_string)
1142 printf("%s%d: quirks=0x%b\n", periph->periph_name,
1143 periph->unit_number, quirks, bit_string);
1148 xpt_announce_quirks_sbuf(struct cam_periph *periph, struct sbuf *sb,
1149 int quirks, char *bit_string)
1151 if (xsoftc.announce_nosbuf != 0) {
1152 xpt_announce_quirks(periph, quirks, bit_string);
1157 sbuf_printf(sb, "%s%d: quirks=0x%b\n", periph->periph_name,
1158 periph->unit_number, quirks, bit_string);
1163 xpt_denounce_periph(struct cam_periph *periph)
1165 struct cam_path *path = periph->path;
1166 struct xpt_proto *proto;
1168 cam_periph_assert(periph, MA_OWNED);
1169 printf("%s%d at %s%d bus %d scbus%d target %d lun %jx\n",
1170 periph->periph_name, periph->unit_number,
1171 path->bus->sim->sim_name,
1172 path->bus->sim->unit_number,
1173 path->bus->sim->bus_id,
1175 path->target->target_id,
1176 (uintmax_t)path->device->lun_id);
1177 printf("%s%d: ", periph->periph_name, periph->unit_number);
1178 proto = xpt_proto_find(path->device->protocol);
1180 proto->ops->denounce(path->device);
1182 printf("%s%d: Unknown protocol device %d\n",
1183 periph->periph_name, periph->unit_number,
1184 path->device->protocol);
1185 if (path->device->serial_num_len > 0)
1186 printf(" s/n %.60s", path->device->serial_num);
1187 printf(" detached\n");
1191 xpt_denounce_periph_sbuf(struct cam_periph *periph, struct sbuf *sb)
1193 struct cam_path *path = periph->path;
1194 struct xpt_proto *proto;
1196 cam_periph_assert(periph, MA_OWNED);
1198 /* Fall back to the non-sbuf method if necessary */
1199 if (xsoftc.announce_nosbuf != 0) {
1200 xpt_denounce_periph(periph);
1203 proto = xpt_proto_find(path->device->protocol);
1204 if ((proto != NULL) && (proto->ops->denounce_sbuf == NULL)) {
1205 xpt_denounce_periph(periph);
1209 sbuf_printf(sb, "%s%d at %s%d bus %d scbus%d target %d lun %jx\n",
1210 periph->periph_name, periph->unit_number,
1211 path->bus->sim->sim_name,
1212 path->bus->sim->unit_number,
1213 path->bus->sim->bus_id,
1215 path->target->target_id,
1216 (uintmax_t)path->device->lun_id);
1217 sbuf_printf(sb, "%s%d: ", periph->periph_name, periph->unit_number);
1220 proto->ops->denounce_sbuf(path->device, sb);
1222 sbuf_printf(sb, "%s%d: Unknown protocol device %d\n",
1223 periph->periph_name, periph->unit_number,
1224 path->device->protocol);
1225 if (path->device->serial_num_len > 0)
1226 sbuf_printf(sb, " s/n %.60s", path->device->serial_num);
1227 sbuf_printf(sb, " detached\n");
1231 xpt_getattr(char *buf, size_t len, const char *attr, struct cam_path *path)
1234 struct ccb_dev_advinfo cdai;
1235 struct scsi_vpd_device_id *did;
1236 struct scsi_vpd_id_descriptor *idd;
1238 xpt_path_assert(path, MA_OWNED);
1240 memset(&cdai, 0, sizeof(cdai));
1241 xpt_setup_ccb(&cdai.ccb_h, path, CAM_PRIORITY_NORMAL);
1242 cdai.ccb_h.func_code = XPT_DEV_ADVINFO;
1243 cdai.flags = CDAI_FLAG_NONE;
1247 if (!strcmp(attr, "GEOM::ident"))
1248 cdai.buftype = CDAI_TYPE_SERIAL_NUM;
1249 else if (!strcmp(attr, "GEOM::physpath"))
1250 cdai.buftype = CDAI_TYPE_PHYS_PATH;
1251 else if (strcmp(attr, "GEOM::lunid") == 0 ||
1252 strcmp(attr, "GEOM::lunname") == 0) {
1253 cdai.buftype = CDAI_TYPE_SCSI_DEVID;
1254 cdai.bufsiz = CAM_SCSI_DEVID_MAXLEN;
1255 cdai.buf = malloc(cdai.bufsiz, M_CAMXPT, M_NOWAIT);
1256 if (cdai.buf == NULL) {
1263 xpt_action((union ccb *)&cdai); /* can only be synchronous */
1264 if ((cdai.ccb_h.status & CAM_DEV_QFRZN) != 0)
1265 cam_release_devq(cdai.ccb_h.path, 0, 0, 0, FALSE);
1266 if (cdai.provsiz == 0)
1268 switch(cdai.buftype) {
1269 case CDAI_TYPE_SCSI_DEVID:
1270 did = (struct scsi_vpd_device_id *)cdai.buf;
1271 if (strcmp(attr, "GEOM::lunid") == 0) {
1272 idd = scsi_get_devid(did, cdai.provsiz,
1273 scsi_devid_is_lun_naa);
1275 idd = scsi_get_devid(did, cdai.provsiz,
1276 scsi_devid_is_lun_eui64);
1278 idd = scsi_get_devid(did, cdai.provsiz,
1279 scsi_devid_is_lun_uuid);
1281 idd = scsi_get_devid(did, cdai.provsiz,
1282 scsi_devid_is_lun_md5);
1287 idd = scsi_get_devid(did, cdai.provsiz,
1288 scsi_devid_is_lun_t10);
1290 idd = scsi_get_devid(did, cdai.provsiz,
1291 scsi_devid_is_lun_name);
1296 if ((idd->proto_codeset & SVPD_ID_CODESET_MASK) ==
1297 SVPD_ID_CODESET_ASCII) {
1298 if (idd->length < len) {
1299 for (l = 0; l < idd->length; l++)
1300 buf[l] = idd->identifier[l] ?
1301 idd->identifier[l] : ' ';
1307 if ((idd->proto_codeset & SVPD_ID_CODESET_MASK) ==
1308 SVPD_ID_CODESET_UTF8) {
1309 l = strnlen(idd->identifier, idd->length);
1311 bcopy(idd->identifier, buf, l);
1317 if ((idd->id_type & SVPD_ID_TYPE_MASK) ==
1318 SVPD_ID_TYPE_UUID && idd->identifier[0] == 0x10) {
1319 if ((idd->length - 2) * 2 + 4 >= len) {
1323 for (l = 2, o = 0; l < idd->length; l++) {
1324 if (l == 6 || l == 8 || l == 10 || l == 12)
1325 o += sprintf(buf + o, "-");
1326 o += sprintf(buf + o, "%02x",
1327 idd->identifier[l]);
1331 if (idd->length * 2 < len) {
1332 for (l = 0; l < idd->length; l++)
1333 sprintf(buf + l * 2, "%02x",
1334 idd->identifier[l]);
1339 if (cdai.provsiz < len) {
1340 cdai.buf[cdai.provsiz] = 0;
1348 if ((char *)cdai.buf != buf)
1349 free(cdai.buf, M_CAMXPT);
1353 static dev_match_ret
1354 xptbusmatch(struct dev_match_pattern *patterns, u_int num_patterns,
1357 dev_match_ret retval;
1360 retval = DM_RET_NONE;
1363 * If we aren't given something to match against, that's an error.
1366 return(DM_RET_ERROR);
1369 * If there are no match entries, then this bus matches no
1372 if ((patterns == NULL) || (num_patterns == 0))
1373 return(DM_RET_DESCEND | DM_RET_COPY);
1375 for (i = 0; i < num_patterns; i++) {
1376 struct bus_match_pattern *cur_pattern;
1379 * If the pattern in question isn't for a bus node, we
1380 * aren't interested. However, we do indicate to the
1381 * calling routine that we should continue descending the
1382 * tree, since the user wants to match against lower-level
1385 if (patterns[i].type != DEV_MATCH_BUS) {
1386 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1387 retval |= DM_RET_DESCEND;
1391 cur_pattern = &patterns[i].pattern.bus_pattern;
1394 * If they want to match any bus node, we give them any
1397 if (cur_pattern->flags == BUS_MATCH_ANY) {
1398 /* set the copy flag */
1399 retval |= DM_RET_COPY;
1402 * If we've already decided on an action, go ahead
1405 if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE)
1410 * Not sure why someone would do this...
1412 if (cur_pattern->flags == BUS_MATCH_NONE)
1415 if (((cur_pattern->flags & BUS_MATCH_PATH) != 0)
1416 && (cur_pattern->path_id != bus->path_id))
1419 if (((cur_pattern->flags & BUS_MATCH_BUS_ID) != 0)
1420 && (cur_pattern->bus_id != bus->sim->bus_id))
1423 if (((cur_pattern->flags & BUS_MATCH_UNIT) != 0)
1424 && (cur_pattern->unit_number != bus->sim->unit_number))
1427 if (((cur_pattern->flags & BUS_MATCH_NAME) != 0)
1428 && (strncmp(cur_pattern->dev_name, bus->sim->sim_name,
1433 * If we get to this point, the user definitely wants
1434 * information on this bus. So tell the caller to copy the
1437 retval |= DM_RET_COPY;
1440 * If the return action has been set to descend, then we
1441 * know that we've already seen a non-bus matching
1442 * expression, therefore we need to further descend the tree.
1443 * This won't change by continuing around the loop, so we
1444 * go ahead and return. If we haven't seen a non-bus
1445 * matching expression, we keep going around the loop until
1446 * we exhaust the matching expressions. We'll set the stop
1447 * flag once we fall out of the loop.
1449 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND)
1454 * If the return action hasn't been set to descend yet, that means
1455 * we haven't seen anything other than bus matching patterns. So
1456 * tell the caller to stop descending the tree -- the user doesn't
1457 * want to match against lower level tree elements.
1459 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1460 retval |= DM_RET_STOP;
1465 static dev_match_ret
1466 xptdevicematch(struct dev_match_pattern *patterns, u_int num_patterns,
1467 struct cam_ed *device)
1469 dev_match_ret retval;
1472 retval = DM_RET_NONE;
1475 * If we aren't given something to match against, that's an error.
1478 return(DM_RET_ERROR);
1481 * If there are no match entries, then this device matches no
1484 if ((patterns == NULL) || (num_patterns == 0))
1485 return(DM_RET_DESCEND | DM_RET_COPY);
1487 for (i = 0; i < num_patterns; i++) {
1488 struct device_match_pattern *cur_pattern;
1489 struct scsi_vpd_device_id *device_id_page;
1492 * If the pattern in question isn't for a device node, we
1493 * aren't interested.
1495 if (patterns[i].type != DEV_MATCH_DEVICE) {
1496 if ((patterns[i].type == DEV_MATCH_PERIPH)
1497 && ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE))
1498 retval |= DM_RET_DESCEND;
1502 cur_pattern = &patterns[i].pattern.device_pattern;
1504 /* Error out if mutually exclusive options are specified. */
1505 if ((cur_pattern->flags & (DEV_MATCH_INQUIRY|DEV_MATCH_DEVID))
1506 == (DEV_MATCH_INQUIRY|DEV_MATCH_DEVID))
1507 return(DM_RET_ERROR);
1510 * If they want to match any device node, we give them any
1513 if (cur_pattern->flags == DEV_MATCH_ANY)
1517 * Not sure why someone would do this...
1519 if (cur_pattern->flags == DEV_MATCH_NONE)
1522 if (((cur_pattern->flags & DEV_MATCH_PATH) != 0)
1523 && (cur_pattern->path_id != device->target->bus->path_id))
1526 if (((cur_pattern->flags & DEV_MATCH_TARGET) != 0)
1527 && (cur_pattern->target_id != device->target->target_id))
1530 if (((cur_pattern->flags & DEV_MATCH_LUN) != 0)
1531 && (cur_pattern->target_lun != device->lun_id))
1534 if (((cur_pattern->flags & DEV_MATCH_INQUIRY) != 0)
1535 && (cam_quirkmatch((caddr_t)&device->inq_data,
1536 (caddr_t)&cur_pattern->data.inq_pat,
1537 1, sizeof(cur_pattern->data.inq_pat),
1538 scsi_static_inquiry_match) == NULL))
1541 device_id_page = (struct scsi_vpd_device_id *)device->device_id;
1542 if (((cur_pattern->flags & DEV_MATCH_DEVID) != 0)
1543 && (device->device_id_len < SVPD_DEVICE_ID_HDR_LEN
1544 || scsi_devid_match((uint8_t *)device_id_page->desc_list,
1545 device->device_id_len
1546 - SVPD_DEVICE_ID_HDR_LEN,
1547 cur_pattern->data.devid_pat.id,
1548 cur_pattern->data.devid_pat.id_len) != 0))
1553 * If we get to this point, the user definitely wants
1554 * information on this device. So tell the caller to copy
1557 retval |= DM_RET_COPY;
1560 * If the return action has been set to descend, then we
1561 * know that we've already seen a peripheral matching
1562 * expression, therefore we need to further descend the tree.
1563 * This won't change by continuing around the loop, so we
1564 * go ahead and return. If we haven't seen a peripheral
1565 * matching expression, we keep going around the loop until
1566 * we exhaust the matching expressions. We'll set the stop
1567 * flag once we fall out of the loop.
1569 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND)
1574 * If the return action hasn't been set to descend yet, that means
1575 * we haven't seen any peripheral matching patterns. So tell the
1576 * caller to stop descending the tree -- the user doesn't want to
1577 * match against lower level tree elements.
1579 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1580 retval |= DM_RET_STOP;
1586 * Match a single peripheral against any number of match patterns.
1588 static dev_match_ret
1589 xptperiphmatch(struct dev_match_pattern *patterns, u_int num_patterns,
1590 struct cam_periph *periph)
1592 dev_match_ret retval;
1596 * If we aren't given something to match against, that's an error.
1599 return(DM_RET_ERROR);
1602 * If there are no match entries, then this peripheral matches no
1605 if ((patterns == NULL) || (num_patterns == 0))
1606 return(DM_RET_STOP | DM_RET_COPY);
1609 * There aren't any nodes below a peripheral node, so there's no
1610 * reason to descend the tree any further.
1612 retval = DM_RET_STOP;
1614 for (i = 0; i < num_patterns; i++) {
1615 struct periph_match_pattern *cur_pattern;
1618 * If the pattern in question isn't for a peripheral, we
1619 * aren't interested.
1621 if (patterns[i].type != DEV_MATCH_PERIPH)
1624 cur_pattern = &patterns[i].pattern.periph_pattern;
1627 * If they want to match on anything, then we will do so.
1629 if (cur_pattern->flags == PERIPH_MATCH_ANY) {
1630 /* set the copy flag */
1631 retval |= DM_RET_COPY;
1634 * We've already set the return action to stop,
1635 * since there are no nodes below peripherals in
1642 * Not sure why someone would do this...
1644 if (cur_pattern->flags == PERIPH_MATCH_NONE)
1647 if (((cur_pattern->flags & PERIPH_MATCH_PATH) != 0)
1648 && (cur_pattern->path_id != periph->path->bus->path_id))
1652 * For the target and lun id's, we have to make sure the
1653 * target and lun pointers aren't NULL. The xpt peripheral
1654 * has a wildcard target and device.
1656 if (((cur_pattern->flags & PERIPH_MATCH_TARGET) != 0)
1657 && ((periph->path->target == NULL)
1658 ||(cur_pattern->target_id != periph->path->target->target_id)))
1661 if (((cur_pattern->flags & PERIPH_MATCH_LUN) != 0)
1662 && ((periph->path->device == NULL)
1663 || (cur_pattern->target_lun != periph->path->device->lun_id)))
1666 if (((cur_pattern->flags & PERIPH_MATCH_UNIT) != 0)
1667 && (cur_pattern->unit_number != periph->unit_number))
1670 if (((cur_pattern->flags & PERIPH_MATCH_NAME) != 0)
1671 && (strncmp(cur_pattern->periph_name, periph->periph_name,
1676 * If we get to this point, the user definitely wants
1677 * information on this peripheral. So tell the caller to
1678 * copy the data out.
1680 retval |= DM_RET_COPY;
1683 * The return action has already been set to stop, since
1684 * peripherals don't have any nodes below them in the EDT.
1690 * If we get to this point, the peripheral that was passed in
1691 * doesn't match any of the patterns.
1697 xptedtbusfunc(struct cam_eb *bus, void *arg)
1699 struct ccb_dev_match *cdm;
1700 struct cam_et *target;
1701 dev_match_ret retval;
1703 cdm = (struct ccb_dev_match *)arg;
1706 * If our position is for something deeper in the tree, that means
1707 * that we've already seen this node. So, we keep going down.
1709 if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1710 && (cdm->pos.cookie.bus == bus)
1711 && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1712 && (cdm->pos.cookie.target != NULL))
1713 retval = DM_RET_DESCEND;
1715 retval = xptbusmatch(cdm->patterns, cdm->num_patterns, bus);
1718 * If we got an error, bail out of the search.
1720 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1721 cdm->status = CAM_DEV_MATCH_ERROR;
1726 * If the copy flag is set, copy this bus out.
1728 if (retval & DM_RET_COPY) {
1731 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1732 sizeof(struct dev_match_result));
1735 * If we don't have enough space to put in another
1736 * match result, save our position and tell the
1737 * user there are more devices to check.
1739 if (spaceleft < sizeof(struct dev_match_result)) {
1740 bzero(&cdm->pos, sizeof(cdm->pos));
1741 cdm->pos.position_type =
1742 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS;
1744 cdm->pos.cookie.bus = bus;
1745 cdm->pos.generations[CAM_BUS_GENERATION]=
1746 xsoftc.bus_generation;
1747 cdm->status = CAM_DEV_MATCH_MORE;
1750 j = cdm->num_matches;
1752 cdm->matches[j].type = DEV_MATCH_BUS;
1753 cdm->matches[j].result.bus_result.path_id = bus->path_id;
1754 cdm->matches[j].result.bus_result.bus_id = bus->sim->bus_id;
1755 cdm->matches[j].result.bus_result.unit_number =
1756 bus->sim->unit_number;
1757 strlcpy(cdm->matches[j].result.bus_result.dev_name,
1759 sizeof(cdm->matches[j].result.bus_result.dev_name));
1763 * If the user is only interested in buses, there's no
1764 * reason to descend to the next level in the tree.
1766 if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP)
1770 * If there is a target generation recorded, check it to
1771 * make sure the target list hasn't changed.
1773 mtx_lock(&bus->eb_mtx);
1774 if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1775 && (cdm->pos.cookie.bus == bus)
1776 && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1777 && (cdm->pos.cookie.target != NULL)) {
1778 if ((cdm->pos.generations[CAM_TARGET_GENERATION] !=
1780 mtx_unlock(&bus->eb_mtx);
1781 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1784 target = (struct cam_et *)cdm->pos.cookie.target;
1788 mtx_unlock(&bus->eb_mtx);
1790 return (xpttargettraverse(bus, target, xptedttargetfunc, arg));
1794 xptedttargetfunc(struct cam_et *target, void *arg)
1796 struct ccb_dev_match *cdm;
1798 struct cam_ed *device;
1800 cdm = (struct ccb_dev_match *)arg;
1804 * If there is a device list generation recorded, check it to
1805 * make sure the device list hasn't changed.
1807 mtx_lock(&bus->eb_mtx);
1808 if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1809 && (cdm->pos.cookie.bus == bus)
1810 && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1811 && (cdm->pos.cookie.target == target)
1812 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1813 && (cdm->pos.cookie.device != NULL)) {
1814 if (cdm->pos.generations[CAM_DEV_GENERATION] !=
1815 target->generation) {
1816 mtx_unlock(&bus->eb_mtx);
1817 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1820 device = (struct cam_ed *)cdm->pos.cookie.device;
1824 mtx_unlock(&bus->eb_mtx);
1826 return (xptdevicetraverse(target, device, xptedtdevicefunc, arg));
1830 xptedtdevicefunc(struct cam_ed *device, void *arg)
1833 struct cam_periph *periph;
1834 struct ccb_dev_match *cdm;
1835 dev_match_ret retval;
1837 cdm = (struct ccb_dev_match *)arg;
1838 bus = device->target->bus;
1841 * If our position is for something deeper in the tree, that means
1842 * that we've already seen this node. So, we keep going down.
1844 if ((cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1845 && (cdm->pos.cookie.device == device)
1846 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
1847 && (cdm->pos.cookie.periph != NULL))
1848 retval = DM_RET_DESCEND;
1850 retval = xptdevicematch(cdm->patterns, cdm->num_patterns,
1853 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1854 cdm->status = CAM_DEV_MATCH_ERROR;
1859 * If the copy flag is set, copy this device out.
1861 if (retval & DM_RET_COPY) {
1864 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1865 sizeof(struct dev_match_result));
1868 * If we don't have enough space to put in another
1869 * match result, save our position and tell the
1870 * user there are more devices to check.
1872 if (spaceleft < sizeof(struct dev_match_result)) {
1873 bzero(&cdm->pos, sizeof(cdm->pos));
1874 cdm->pos.position_type =
1875 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS |
1876 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE;
1878 cdm->pos.cookie.bus = device->target->bus;
1879 cdm->pos.generations[CAM_BUS_GENERATION]=
1880 xsoftc.bus_generation;
1881 cdm->pos.cookie.target = device->target;
1882 cdm->pos.generations[CAM_TARGET_GENERATION] =
1883 device->target->bus->generation;
1884 cdm->pos.cookie.device = device;
1885 cdm->pos.generations[CAM_DEV_GENERATION] =
1886 device->target->generation;
1887 cdm->status = CAM_DEV_MATCH_MORE;
1890 j = cdm->num_matches;
1892 cdm->matches[j].type = DEV_MATCH_DEVICE;
1893 cdm->matches[j].result.device_result.path_id =
1894 device->target->bus->path_id;
1895 cdm->matches[j].result.device_result.target_id =
1896 device->target->target_id;
1897 cdm->matches[j].result.device_result.target_lun =
1899 cdm->matches[j].result.device_result.protocol =
1901 bcopy(&device->inq_data,
1902 &cdm->matches[j].result.device_result.inq_data,
1903 sizeof(struct scsi_inquiry_data));
1904 bcopy(&device->ident_data,
1905 &cdm->matches[j].result.device_result.ident_data,
1906 sizeof(struct ata_params));
1908 /* Let the user know whether this device is unconfigured */
1909 if (device->flags & CAM_DEV_UNCONFIGURED)
1910 cdm->matches[j].result.device_result.flags =
1911 DEV_RESULT_UNCONFIGURED;
1913 cdm->matches[j].result.device_result.flags =
1918 * If the user isn't interested in peripherals, don't descend
1919 * the tree any further.
1921 if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP)
1925 * If there is a peripheral list generation recorded, make sure
1926 * it hasn't changed.
1929 mtx_lock(&bus->eb_mtx);
1930 if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1931 && (cdm->pos.cookie.bus == bus)
1932 && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1933 && (cdm->pos.cookie.target == device->target)
1934 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1935 && (cdm->pos.cookie.device == device)
1936 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
1937 && (cdm->pos.cookie.periph != NULL)) {
1938 if (cdm->pos.generations[CAM_PERIPH_GENERATION] !=
1939 device->generation) {
1940 mtx_unlock(&bus->eb_mtx);
1942 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1945 periph = (struct cam_periph *)cdm->pos.cookie.periph;
1949 mtx_unlock(&bus->eb_mtx);
1952 return (xptperiphtraverse(device, periph, xptedtperiphfunc, arg));
1956 xptedtperiphfunc(struct cam_periph *periph, void *arg)
1958 struct ccb_dev_match *cdm;
1959 dev_match_ret retval;
1961 cdm = (struct ccb_dev_match *)arg;
1963 retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph);
1965 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1966 cdm->status = CAM_DEV_MATCH_ERROR;
1971 * If the copy flag is set, copy this peripheral out.
1973 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 l = sizeof(cdm->matches[j].result.periph_result.periph_name);
2020 strlcpy(cdm->matches[j].result.periph_result.periph_name,
2021 periph->periph_name, l);
2028 xptedtmatch(struct ccb_dev_match *cdm)
2033 cdm->num_matches = 0;
2036 * Check the bus list generation. If it has changed, the user
2037 * needs to reset everything and start over.
2040 if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2041 && (cdm->pos.cookie.bus != NULL)) {
2042 if (cdm->pos.generations[CAM_BUS_GENERATION] !=
2043 xsoftc.bus_generation) {
2045 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
2048 bus = (struct cam_eb *)cdm->pos.cookie.bus;
2054 ret = xptbustraverse(bus, xptedtbusfunc, cdm);
2057 * If we get back 0, that means that we had to stop before fully
2058 * traversing the EDT. It also means that one of the subroutines
2059 * has set the status field to the proper value. If we get back 1,
2060 * we've fully traversed the EDT and copied out any matching entries.
2063 cdm->status = CAM_DEV_MATCH_LAST;
2069 xptplistpdrvfunc(struct periph_driver **pdrv, void *arg)
2071 struct cam_periph *periph;
2072 struct ccb_dev_match *cdm;
2074 cdm = (struct ccb_dev_match *)arg;
2077 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
2078 && (cdm->pos.cookie.pdrv == pdrv)
2079 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
2080 && (cdm->pos.cookie.periph != NULL)) {
2081 if (cdm->pos.generations[CAM_PERIPH_GENERATION] !=
2082 (*pdrv)->generation) {
2084 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
2087 periph = (struct cam_periph *)cdm->pos.cookie.periph;
2093 return (xptpdperiphtraverse(pdrv, periph, xptplistperiphfunc, arg));
2097 xptplistperiphfunc(struct cam_periph *periph, void *arg)
2099 struct ccb_dev_match *cdm;
2100 dev_match_ret retval;
2102 cdm = (struct ccb_dev_match *)arg;
2104 retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph);
2106 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
2107 cdm->status = CAM_DEV_MATCH_ERROR;
2112 * If the copy flag is set, copy this peripheral out.
2114 if (retval & DM_RET_COPY) {
2118 spaceleft = cdm->match_buf_len - (cdm->num_matches *
2119 sizeof(struct dev_match_result));
2122 * If we don't have enough space to put in another
2123 * match result, save our position and tell the
2124 * user there are more devices to check.
2126 if (spaceleft < sizeof(struct dev_match_result)) {
2127 struct periph_driver **pdrv;
2130 bzero(&cdm->pos, sizeof(cdm->pos));
2131 cdm->pos.position_type =
2132 CAM_DEV_POS_PDRV | CAM_DEV_POS_PDPTR |
2136 * This may look a bit non-sensical, but it is
2137 * actually quite logical. There are very few
2138 * peripheral drivers, and bloating every peripheral
2139 * structure with a pointer back to its parent
2140 * peripheral driver linker set entry would cost
2141 * more in the long run than doing this quick lookup.
2143 for (pdrv = periph_drivers; *pdrv != NULL; pdrv++) {
2144 if (strcmp((*pdrv)->driver_name,
2145 periph->periph_name) == 0)
2149 if (*pdrv == NULL) {
2150 cdm->status = CAM_DEV_MATCH_ERROR;
2154 cdm->pos.cookie.pdrv = pdrv;
2156 * The periph generation slot does double duty, as
2157 * does the periph pointer slot. They are used for
2158 * both edt and pdrv lookups and positioning.
2160 cdm->pos.cookie.periph = periph;
2161 cdm->pos.generations[CAM_PERIPH_GENERATION] =
2162 (*pdrv)->generation;
2163 cdm->status = CAM_DEV_MATCH_MORE;
2167 j = cdm->num_matches;
2169 cdm->matches[j].type = DEV_MATCH_PERIPH;
2170 cdm->matches[j].result.periph_result.path_id =
2171 periph->path->bus->path_id;
2174 * The transport layer peripheral doesn't have a target or
2177 if (periph->path->target)
2178 cdm->matches[j].result.periph_result.target_id =
2179 periph->path->target->target_id;
2181 cdm->matches[j].result.periph_result.target_id =
2182 CAM_TARGET_WILDCARD;
2184 if (periph->path->device)
2185 cdm->matches[j].result.periph_result.target_lun =
2186 periph->path->device->lun_id;
2188 cdm->matches[j].result.periph_result.target_lun =
2191 cdm->matches[j].result.periph_result.unit_number =
2192 periph->unit_number;
2193 l = sizeof(cdm->matches[j].result.periph_result.periph_name);
2194 strlcpy(cdm->matches[j].result.periph_result.periph_name,
2195 periph->periph_name, l);
2202 xptperiphlistmatch(struct ccb_dev_match *cdm)
2206 cdm->num_matches = 0;
2209 * At this point in the edt traversal function, we check the bus
2210 * list generation to make sure that no buses have been added or
2211 * removed since the user last sent a XPT_DEV_MATCH ccb through.
2212 * For the peripheral driver list traversal function, however, we
2213 * don't have to worry about new peripheral driver types coming or
2214 * going; they're in a linker set, and therefore can't change
2215 * without a recompile.
2218 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
2219 && (cdm->pos.cookie.pdrv != NULL))
2220 ret = xptpdrvtraverse(
2221 (struct periph_driver **)cdm->pos.cookie.pdrv,
2222 xptplistpdrvfunc, cdm);
2224 ret = xptpdrvtraverse(NULL, xptplistpdrvfunc, cdm);
2227 * If we get back 0, that means that we had to stop before fully
2228 * traversing the peripheral driver tree. It also means that one of
2229 * the subroutines has set the status field to the proper value. If
2230 * we get back 1, we've fully traversed the EDT and copied out any
2234 cdm->status = CAM_DEV_MATCH_LAST;
2240 xptbustraverse(struct cam_eb *start_bus, xpt_busfunc_t *tr_func, void *arg)
2242 struct cam_eb *bus, *next_bus;
2250 bus = TAILQ_FIRST(&xsoftc.xpt_busses);
2258 for (; bus != NULL; bus = next_bus) {
2259 retval = tr_func(bus, arg);
2261 xpt_release_bus(bus);
2265 next_bus = TAILQ_NEXT(bus, links);
2267 next_bus->refcount++;
2269 xpt_release_bus(bus);
2275 xpttargettraverse(struct cam_eb *bus, struct cam_et *start_target,
2276 xpt_targetfunc_t *tr_func, void *arg)
2278 struct cam_et *target, *next_target;
2283 target = start_target;
2285 mtx_lock(&bus->eb_mtx);
2286 target = TAILQ_FIRST(&bus->et_entries);
2287 if (target == NULL) {
2288 mtx_unlock(&bus->eb_mtx);
2292 mtx_unlock(&bus->eb_mtx);
2294 for (; target != NULL; target = next_target) {
2295 retval = tr_func(target, arg);
2297 xpt_release_target(target);
2300 mtx_lock(&bus->eb_mtx);
2301 next_target = TAILQ_NEXT(target, links);
2303 next_target->refcount++;
2304 mtx_unlock(&bus->eb_mtx);
2305 xpt_release_target(target);
2311 xptdevicetraverse(struct cam_et *target, struct cam_ed *start_device,
2312 xpt_devicefunc_t *tr_func, void *arg)
2315 struct cam_ed *device, *next_device;
2321 device = start_device;
2323 mtx_lock(&bus->eb_mtx);
2324 device = TAILQ_FIRST(&target->ed_entries);
2325 if (device == NULL) {
2326 mtx_unlock(&bus->eb_mtx);
2330 mtx_unlock(&bus->eb_mtx);
2332 for (; device != NULL; device = next_device) {
2333 mtx_lock(&device->device_mtx);
2334 retval = tr_func(device, arg);
2335 mtx_unlock(&device->device_mtx);
2337 xpt_release_device(device);
2340 mtx_lock(&bus->eb_mtx);
2341 next_device = TAILQ_NEXT(device, links);
2343 next_device->refcount++;
2344 mtx_unlock(&bus->eb_mtx);
2345 xpt_release_device(device);
2351 xptperiphtraverse(struct cam_ed *device, struct cam_periph *start_periph,
2352 xpt_periphfunc_t *tr_func, void *arg)
2355 struct cam_periph *periph, *next_periph;
2360 bus = device->target->bus;
2362 periph = start_periph;
2365 mtx_lock(&bus->eb_mtx);
2366 periph = SLIST_FIRST(&device->periphs);
2367 while (periph != NULL && (periph->flags & CAM_PERIPH_FREE) != 0)
2368 periph = SLIST_NEXT(periph, periph_links);
2369 if (periph == NULL) {
2370 mtx_unlock(&bus->eb_mtx);
2375 mtx_unlock(&bus->eb_mtx);
2378 for (; periph != NULL; periph = next_periph) {
2379 retval = tr_func(periph, arg);
2381 cam_periph_release_locked(periph);
2385 mtx_lock(&bus->eb_mtx);
2386 next_periph = SLIST_NEXT(periph, periph_links);
2387 while (next_periph != NULL &&
2388 (next_periph->flags & CAM_PERIPH_FREE) != 0)
2389 next_periph = SLIST_NEXT(next_periph, periph_links);
2391 next_periph->refcount++;
2392 mtx_unlock(&bus->eb_mtx);
2394 cam_periph_release_locked(periph);
2400 xptpdrvtraverse(struct periph_driver **start_pdrv,
2401 xpt_pdrvfunc_t *tr_func, void *arg)
2403 struct periph_driver **pdrv;
2409 * We don't traverse the peripheral driver list like we do the
2410 * other lists, because it is a linker set, and therefore cannot be
2411 * changed during runtime. If the peripheral driver list is ever
2412 * re-done to be something other than a linker set (i.e. it can
2413 * change while the system is running), the list traversal should
2414 * be modified to work like the other traversal functions.
2416 for (pdrv = (start_pdrv ? start_pdrv : periph_drivers);
2417 *pdrv != NULL; pdrv++) {
2418 retval = tr_func(pdrv, arg);
2428 xptpdperiphtraverse(struct periph_driver **pdrv,
2429 struct cam_periph *start_periph,
2430 xpt_periphfunc_t *tr_func, void *arg)
2432 struct cam_periph *periph, *next_periph;
2438 periph = start_periph;
2441 periph = TAILQ_FIRST(&(*pdrv)->units);
2442 while (periph != NULL && (periph->flags & CAM_PERIPH_FREE) != 0)
2443 periph = TAILQ_NEXT(periph, unit_links);
2444 if (periph == NULL) {
2451 for (; periph != NULL; periph = next_periph) {
2452 cam_periph_lock(periph);
2453 retval = tr_func(periph, arg);
2454 cam_periph_unlock(periph);
2456 cam_periph_release(periph);
2460 next_periph = TAILQ_NEXT(periph, unit_links);
2461 while (next_periph != NULL &&
2462 (next_periph->flags & CAM_PERIPH_FREE) != 0)
2463 next_periph = TAILQ_NEXT(next_periph, unit_links);
2465 next_periph->refcount++;
2467 cam_periph_release(periph);
2473 xptdefbusfunc(struct cam_eb *bus, void *arg)
2475 struct xpt_traverse_config *tr_config;
2477 tr_config = (struct xpt_traverse_config *)arg;
2479 if (tr_config->depth == XPT_DEPTH_BUS) {
2480 xpt_busfunc_t *tr_func;
2482 tr_func = (xpt_busfunc_t *)tr_config->tr_func;
2484 return(tr_func(bus, tr_config->tr_arg));
2486 return(xpttargettraverse(bus, NULL, xptdeftargetfunc, arg));
2490 xptdeftargetfunc(struct cam_et *target, void *arg)
2492 struct xpt_traverse_config *tr_config;
2494 tr_config = (struct xpt_traverse_config *)arg;
2496 if (tr_config->depth == XPT_DEPTH_TARGET) {
2497 xpt_targetfunc_t *tr_func;
2499 tr_func = (xpt_targetfunc_t *)tr_config->tr_func;
2501 return(tr_func(target, tr_config->tr_arg));
2503 return(xptdevicetraverse(target, NULL, xptdefdevicefunc, arg));
2507 xptdefdevicefunc(struct cam_ed *device, void *arg)
2509 struct xpt_traverse_config *tr_config;
2511 tr_config = (struct xpt_traverse_config *)arg;
2513 if (tr_config->depth == XPT_DEPTH_DEVICE) {
2514 xpt_devicefunc_t *tr_func;
2516 tr_func = (xpt_devicefunc_t *)tr_config->tr_func;
2518 return(tr_func(device, tr_config->tr_arg));
2520 return(xptperiphtraverse(device, NULL, xptdefperiphfunc, arg));
2524 xptdefperiphfunc(struct cam_periph *periph, void *arg)
2526 struct xpt_traverse_config *tr_config;
2527 xpt_periphfunc_t *tr_func;
2529 tr_config = (struct xpt_traverse_config *)arg;
2531 tr_func = (xpt_periphfunc_t *)tr_config->tr_func;
2534 * Unlike the other default functions, we don't check for depth
2535 * here. The peripheral driver level is the last level in the EDT,
2536 * so if we're here, we should execute the function in question.
2538 return(tr_func(periph, tr_config->tr_arg));
2542 * Execute the given function for every bus in the EDT.
2545 xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg)
2547 struct xpt_traverse_config tr_config;
2549 tr_config.depth = XPT_DEPTH_BUS;
2550 tr_config.tr_func = tr_func;
2551 tr_config.tr_arg = arg;
2553 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2557 * Execute the given function for every device in the EDT.
2560 xpt_for_all_devices(xpt_devicefunc_t *tr_func, void *arg)
2562 struct xpt_traverse_config tr_config;
2564 tr_config.depth = XPT_DEPTH_DEVICE;
2565 tr_config.tr_func = tr_func;
2566 tr_config.tr_arg = arg;
2568 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2572 xptsetasyncfunc(struct cam_ed *device, void *arg)
2574 struct cam_path path;
2575 struct ccb_getdev cgd;
2576 struct ccb_setasync *csa = (struct ccb_setasync *)arg;
2579 * Don't report unconfigured devices (Wildcard devs,
2580 * devices only for target mode, device instances
2581 * that have been invalidated but are waiting for
2582 * their last reference count to be released).
2584 if ((device->flags & CAM_DEV_UNCONFIGURED) != 0)
2587 xpt_compile_path(&path,
2589 device->target->bus->path_id,
2590 device->target->target_id,
2592 xpt_setup_ccb(&cgd.ccb_h, &path, CAM_PRIORITY_NORMAL);
2593 cgd.ccb_h.func_code = XPT_GDEV_TYPE;
2594 xpt_action((union ccb *)&cgd);
2595 csa->callback(csa->callback_arg,
2598 xpt_release_path(&path);
2604 xptsetasyncbusfunc(struct cam_eb *bus, void *arg)
2606 struct cam_path path;
2607 struct ccb_pathinq cpi;
2608 struct ccb_setasync *csa = (struct ccb_setasync *)arg;
2610 xpt_compile_path(&path, /*periph*/NULL,
2612 CAM_TARGET_WILDCARD,
2614 xpt_path_lock(&path);
2615 xpt_path_inq(&cpi, &path);
2616 csa->callback(csa->callback_arg,
2619 xpt_path_unlock(&path);
2620 xpt_release_path(&path);
2626 xpt_action(union ccb *start_ccb)
2629 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE,
2630 ("xpt_action: func %#x %s\n", start_ccb->ccb_h.func_code,
2631 xpt_action_name(start_ccb->ccb_h.func_code)));
2633 start_ccb->ccb_h.status = CAM_REQ_INPROG;
2634 (*(start_ccb->ccb_h.path->bus->xport->ops->action))(start_ccb);
2638 xpt_action_default(union ccb *start_ccb)
2640 struct cam_path *path;
2641 struct cam_sim *sim;
2644 path = start_ccb->ccb_h.path;
2645 CAM_DEBUG(path, CAM_DEBUG_TRACE,
2646 ("xpt_action_default: func %#x %s\n", start_ccb->ccb_h.func_code,
2647 xpt_action_name(start_ccb->ccb_h.func_code)));
2649 switch (start_ccb->ccb_h.func_code) {
2652 struct cam_ed *device;
2655 * For the sake of compatibility with SCSI-1
2656 * devices that may not understand the identify
2657 * message, we include lun information in the
2658 * second byte of all commands. SCSI-1 specifies
2659 * that luns are a 3 bit value and reserves only 3
2660 * bits for lun information in the CDB. Later
2661 * revisions of the SCSI spec allow for more than 8
2662 * luns, but have deprecated lun information in the
2663 * CDB. So, if the lun won't fit, we must omit.
2665 * Also be aware that during initial probing for devices,
2666 * the inquiry information is unknown but initialized to 0.
2667 * This means that this code will be exercised while probing
2668 * devices with an ANSI revision greater than 2.
2670 device = path->device;
2671 if (device->protocol_version <= SCSI_REV_2
2672 && start_ccb->ccb_h.target_lun < 8
2673 && (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 case XPT_NVME_ADMIN:
2696 struct cam_devq *devq;
2698 devq = path->bus->sim->devq;
2699 mtx_lock(&devq->send_mtx);
2700 cam_ccbq_insert_ccb(&path->device->ccbq, start_ccb);
2701 if (xpt_schedule_devq(devq, path->device) != 0)
2703 mtx_unlock(&devq->send_mtx);
2706 case XPT_CALC_GEOMETRY:
2707 /* Filter out garbage */
2708 if (start_ccb->ccg.block_size == 0
2709 || start_ccb->ccg.volume_size == 0) {
2710 start_ccb->ccg.cylinders = 0;
2711 start_ccb->ccg.heads = 0;
2712 start_ccb->ccg.secs_per_track = 0;
2713 start_ccb->ccb_h.status = CAM_REQ_CMP;
2719 union ccb* abort_ccb;
2721 abort_ccb = start_ccb->cab.abort_ccb;
2722 if (XPT_FC_IS_DEV_QUEUED(abort_ccb)) {
2723 struct cam_ed *device;
2724 struct cam_devq *devq;
2726 device = abort_ccb->ccb_h.path->device;
2727 devq = device->sim->devq;
2729 mtx_lock(&devq->send_mtx);
2730 if (abort_ccb->ccb_h.pinfo.index > 0) {
2731 cam_ccbq_remove_ccb(&device->ccbq, abort_ccb);
2732 abort_ccb->ccb_h.status =
2733 CAM_REQ_ABORTED|CAM_DEV_QFRZN;
2734 xpt_freeze_devq_device(device, 1);
2735 mtx_unlock(&devq->send_mtx);
2736 xpt_done(abort_ccb);
2737 start_ccb->ccb_h.status = CAM_REQ_CMP;
2740 mtx_unlock(&devq->send_mtx);
2742 if (abort_ccb->ccb_h.pinfo.index == CAM_UNQUEUED_INDEX
2743 && (abort_ccb->ccb_h.status & CAM_SIM_QUEUED) == 0) {
2745 * We've caught this ccb en route to
2746 * the SIM. Flag it for abort and the
2747 * SIM will do so just before starting
2748 * real work on the CCB.
2750 abort_ccb->ccb_h.status =
2751 CAM_REQ_ABORTED|CAM_DEV_QFRZN;
2752 xpt_freeze_devq(abort_ccb->ccb_h.path, 1);
2753 start_ccb->ccb_h.status = CAM_REQ_CMP;
2757 if (XPT_FC_IS_QUEUED(abort_ccb)
2758 && (abort_ccb->ccb_h.pinfo.index == CAM_DONEQ_INDEX)) {
2760 * It's already completed but waiting
2761 * for our SWI to get to it.
2763 start_ccb->ccb_h.status = CAM_UA_ABORT;
2767 * If we weren't able to take care of the abort request
2768 * in the XPT, pass the request down to the SIM for processing.
2772 case XPT_ACCEPT_TARGET_IO:
2774 case XPT_IMMED_NOTIFY:
2775 case XPT_NOTIFY_ACK:
2777 case XPT_IMMEDIATE_NOTIFY:
2778 case XPT_NOTIFY_ACKNOWLEDGE:
2779 case XPT_GET_SIM_KNOB_OLD:
2780 case XPT_GET_SIM_KNOB:
2781 case XPT_SET_SIM_KNOB:
2782 case XPT_GET_TRAN_SETTINGS:
2783 case XPT_SET_TRAN_SETTINGS:
2786 sim = path->bus->sim;
2788 if (mtx && !mtx_owned(mtx))
2793 CAM_DEBUG(path, CAM_DEBUG_TRACE,
2794 ("Calling sim->sim_action(): func=%#x\n", start_ccb->ccb_h.func_code));
2795 (*(sim->sim_action))(sim, start_ccb);
2796 CAM_DEBUG(path, CAM_DEBUG_TRACE,
2797 ("sim->sim_action returned: status=%#x\n", start_ccb->ccb_h.status));
2801 case XPT_PATH_STATS:
2802 start_ccb->cpis.last_reset = path->bus->last_reset;
2803 start_ccb->ccb_h.status = CAM_REQ_CMP;
2810 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) {
2811 start_ccb->ccb_h.status = CAM_DEV_NOT_THERE;
2813 struct ccb_getdev *cgd;
2815 cgd = &start_ccb->cgd;
2816 cgd->protocol = dev->protocol;
2817 cgd->inq_data = dev->inq_data;
2818 cgd->ident_data = dev->ident_data;
2819 cgd->inq_flags = dev->inq_flags;
2820 cgd->ccb_h.status = CAM_REQ_CMP;
2821 cgd->serial_num_len = dev->serial_num_len;
2822 if ((dev->serial_num_len > 0)
2823 && (dev->serial_num != NULL))
2824 bcopy(dev->serial_num, cgd->serial_num,
2825 dev->serial_num_len);
2829 case XPT_GDEV_STATS:
2831 struct ccb_getdevstats *cgds = &start_ccb->cgds;
2832 struct cam_ed *dev = path->device;
2833 struct cam_eb *bus = path->bus;
2834 struct cam_et *tar = path->target;
2835 struct cam_devq *devq = bus->sim->devq;
2837 mtx_lock(&devq->send_mtx);
2838 cgds->dev_openings = dev->ccbq.dev_openings;
2839 cgds->dev_active = dev->ccbq.dev_active;
2840 cgds->allocated = dev->ccbq.allocated;
2841 cgds->queued = cam_ccbq_pending_ccb_count(&dev->ccbq);
2842 cgds->held = cgds->allocated - cgds->dev_active - cgds->queued;
2843 cgds->last_reset = tar->last_reset;
2844 cgds->maxtags = dev->maxtags;
2845 cgds->mintags = dev->mintags;
2846 if (timevalcmp(&tar->last_reset, &bus->last_reset, <))
2847 cgds->last_reset = bus->last_reset;
2848 mtx_unlock(&devq->send_mtx);
2849 cgds->ccb_h.status = CAM_REQ_CMP;
2854 struct cam_periph *nperiph;
2855 struct periph_list *periph_head;
2856 struct ccb_getdevlist *cgdl;
2858 struct cam_ed *device;
2864 * Don't want anyone mucking with our data.
2866 device = path->device;
2867 periph_head = &device->periphs;
2868 cgdl = &start_ccb->cgdl;
2871 * Check and see if the list has changed since the user
2872 * last requested a list member. If so, tell them that the
2873 * list has changed, and therefore they need to start over
2874 * from the beginning.
2876 if ((cgdl->index != 0) &&
2877 (cgdl->generation != device->generation)) {
2878 cgdl->status = CAM_GDEVLIST_LIST_CHANGED;
2883 * Traverse the list of peripherals and attempt to find
2884 * the requested peripheral.
2886 for (nperiph = SLIST_FIRST(periph_head), i = 0;
2887 (nperiph != NULL) && (i <= cgdl->index);
2888 nperiph = SLIST_NEXT(nperiph, periph_links), i++) {
2889 if (i == cgdl->index) {
2890 strlcpy(cgdl->periph_name,
2891 nperiph->periph_name,
2892 sizeof(cgdl->periph_name));
2893 cgdl->unit_number = nperiph->unit_number;
2898 cgdl->status = CAM_GDEVLIST_ERROR;
2902 if (nperiph == NULL)
2903 cgdl->status = CAM_GDEVLIST_LAST_DEVICE;
2905 cgdl->status = CAM_GDEVLIST_MORE_DEVS;
2908 cgdl->generation = device->generation;
2910 cgdl->ccb_h.status = CAM_REQ_CMP;
2915 dev_pos_type position_type;
2916 struct ccb_dev_match *cdm;
2918 cdm = &start_ccb->cdm;
2921 * There are two ways of getting at information in the EDT.
2922 * The first way is via the primary EDT tree. It starts
2923 * with a list of buses, then a list of targets on a bus,
2924 * then devices/luns on a target, and then peripherals on a
2925 * device/lun. The "other" way is by the peripheral driver
2926 * lists. The peripheral driver lists are organized by
2927 * peripheral driver. (obviously) So it makes sense to
2928 * use the peripheral driver list if the user is looking
2929 * for something like "da1", or all "da" devices. If the
2930 * user is looking for something on a particular bus/target
2931 * or lun, it's generally better to go through the EDT tree.
2934 if (cdm->pos.position_type != CAM_DEV_POS_NONE)
2935 position_type = cdm->pos.position_type;
2939 position_type = CAM_DEV_POS_NONE;
2941 for (i = 0; i < cdm->num_patterns; i++) {
2942 if ((cdm->patterns[i].type == DEV_MATCH_BUS)
2943 ||(cdm->patterns[i].type == DEV_MATCH_DEVICE)){
2944 position_type = CAM_DEV_POS_EDT;
2949 if (cdm->num_patterns == 0)
2950 position_type = CAM_DEV_POS_EDT;
2951 else if (position_type == CAM_DEV_POS_NONE)
2952 position_type = CAM_DEV_POS_PDRV;
2955 switch(position_type & CAM_DEV_POS_TYPEMASK) {
2956 case CAM_DEV_POS_EDT:
2959 case CAM_DEV_POS_PDRV:
2960 xptperiphlistmatch(cdm);
2963 cdm->status = CAM_DEV_MATCH_ERROR;
2967 if (cdm->status == CAM_DEV_MATCH_ERROR)
2968 start_ccb->ccb_h.status = CAM_REQ_CMP_ERR;
2970 start_ccb->ccb_h.status = CAM_REQ_CMP;
2976 struct ccb_setasync *csa;
2977 struct async_node *cur_entry;
2978 struct async_list *async_head;
2981 csa = &start_ccb->csa;
2982 added = csa->event_enable;
2983 async_head = &path->device->asyncs;
2986 * If there is already an entry for us, simply
2989 cur_entry = SLIST_FIRST(async_head);
2990 while (cur_entry != NULL) {
2991 if ((cur_entry->callback_arg == csa->callback_arg)
2992 && (cur_entry->callback == csa->callback))
2994 cur_entry = SLIST_NEXT(cur_entry, links);
2997 if (cur_entry != NULL) {
2999 * If the request has no flags set,
3002 added &= ~cur_entry->event_enable;
3003 if (csa->event_enable == 0) {
3004 SLIST_REMOVE(async_head, cur_entry,
3006 xpt_release_device(path->device);
3007 free(cur_entry, M_CAMXPT);
3009 cur_entry->event_enable = csa->event_enable;
3011 csa->event_enable = added;
3013 cur_entry = malloc(sizeof(*cur_entry), M_CAMXPT,
3015 if (cur_entry == NULL) {
3016 csa->ccb_h.status = CAM_RESRC_UNAVAIL;
3019 cur_entry->event_enable = csa->event_enable;
3020 cur_entry->event_lock = (path->bus->sim->mtx &&
3021 mtx_owned(path->bus->sim->mtx)) ? 1 : 0;
3022 cur_entry->callback_arg = csa->callback_arg;
3023 cur_entry->callback = csa->callback;
3024 SLIST_INSERT_HEAD(async_head, cur_entry, links);
3025 xpt_acquire_device(path->device);
3027 start_ccb->ccb_h.status = CAM_REQ_CMP;
3032 struct ccb_relsim *crs;
3035 crs = &start_ccb->crs;
3038 crs->ccb_h.status = CAM_DEV_NOT_THERE;
3042 if ((crs->release_flags & RELSIM_ADJUST_OPENINGS) != 0) {
3043 /* Don't ever go below one opening */
3044 if (crs->openings > 0) {
3045 xpt_dev_ccbq_resize(path, crs->openings);
3048 "number of openings is now %d\n",
3054 mtx_lock(&dev->sim->devq->send_mtx);
3055 if ((crs->release_flags & RELSIM_RELEASE_AFTER_TIMEOUT) != 0) {
3056 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) {
3058 * Just extend the old timeout and decrement
3059 * the freeze count so that a single timeout
3060 * is sufficient for releasing the queue.
3062 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
3063 callout_stop(&dev->callout);
3065 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
3068 callout_reset_sbt(&dev->callout,
3069 SBT_1MS * crs->release_timeout, 0,
3070 xpt_release_devq_timeout, dev, 0);
3072 dev->flags |= CAM_DEV_REL_TIMEOUT_PENDING;
3075 if ((crs->release_flags & RELSIM_RELEASE_AFTER_CMDCMPLT) != 0) {
3076 if ((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0) {
3078 * Decrement the freeze count so that a single
3079 * completion is still sufficient to unfreeze
3082 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
3084 dev->flags |= CAM_DEV_REL_ON_COMPLETE;
3085 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
3089 if ((crs->release_flags & RELSIM_RELEASE_AFTER_QEMPTY) != 0) {
3090 if ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0
3091 || (dev->ccbq.dev_active == 0)) {
3092 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
3094 dev->flags |= CAM_DEV_REL_ON_QUEUE_EMPTY;
3095 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
3098 mtx_unlock(&dev->sim->devq->send_mtx);
3100 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) == 0)
3101 xpt_release_devq(path, /*count*/1, /*run_queue*/TRUE);
3102 start_ccb->crs.qfrozen_cnt = dev->ccbq.queue.qfrozen_cnt;
3103 start_ccb->ccb_h.status = CAM_REQ_CMP;
3107 struct cam_path *oldpath;
3109 /* Check that all request bits are supported. */
3110 if (start_ccb->cdbg.flags & ~(CAM_DEBUG_COMPILE)) {
3111 start_ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
3115 cam_dflags = CAM_DEBUG_NONE;
3116 if (cam_dpath != NULL) {
3117 oldpath = cam_dpath;
3119 xpt_free_path(oldpath);
3121 if (start_ccb->cdbg.flags != CAM_DEBUG_NONE) {
3122 if (xpt_create_path(&cam_dpath, NULL,
3123 start_ccb->ccb_h.path_id,
3124 start_ccb->ccb_h.target_id,
3125 start_ccb->ccb_h.target_lun) !=
3127 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
3129 cam_dflags = start_ccb->cdbg.flags;
3130 start_ccb->ccb_h.status = CAM_REQ_CMP;
3131 xpt_print(cam_dpath, "debugging flags now %x\n",
3135 start_ccb->ccb_h.status = CAM_REQ_CMP;
3139 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0)
3140 xpt_freeze_devq(path, 1);
3141 start_ccb->ccb_h.status = CAM_REQ_CMP;
3143 case XPT_REPROBE_LUN:
3144 xpt_async(AC_INQ_CHANGED, path, NULL);
3145 start_ccb->ccb_h.status = CAM_REQ_CMP;
3146 xpt_done(start_ccb);
3149 start_ccb->ccb_h.status = CAM_REQ_CMP;
3150 xpt_done(start_ccb);
3157 xpt_print(start_ccb->ccb_h.path,
3158 "%s: CCB type %#x %s not supported\n", __func__,
3159 start_ccb->ccb_h.func_code,
3160 xpt_action_name(start_ccb->ccb_h.func_code));
3161 start_ccb->ccb_h.status = CAM_PROVIDE_FAIL;
3162 if (start_ccb->ccb_h.func_code & XPT_FC_DEV_QUEUED) {
3163 xpt_done(start_ccb);
3167 CAM_DEBUG(path, CAM_DEBUG_TRACE,
3168 ("xpt_action_default: func= %#x %s status %#x\n",
3169 start_ccb->ccb_h.func_code,
3170 xpt_action_name(start_ccb->ccb_h.func_code),
3171 start_ccb->ccb_h.status));
3175 * Call the sim poll routine to allow the sim to complete
3176 * any inflight requests, then call camisr_runqueue to
3177 * complete any CCB that the polling completed.
3180 xpt_sim_poll(struct cam_sim *sim)
3184 KASSERT(cam_sim_pollable(sim), ("%s: non-pollable sim", __func__));
3188 (*(sim->sim_poll))(sim);
3195 xpt_poll_setup(union ccb *start_ccb)
3198 struct cam_sim *sim;
3199 struct cam_devq *devq;
3202 timeout = start_ccb->ccb_h.timeout * 10;
3203 sim = start_ccb->ccb_h.path->bus->sim;
3205 dev = start_ccb->ccb_h.path->device;
3207 KASSERT(cam_sim_pollable(sim), ("%s: non-pollable sim", __func__));
3210 * Steal an opening so that no other queued requests
3211 * can get it before us while we simulate interrupts.
3213 mtx_lock(&devq->send_mtx);
3214 dev->ccbq.dev_openings--;
3215 while((devq->send_openings <= 0 || dev->ccbq.dev_openings < 0) &&
3217 mtx_unlock(&devq->send_mtx);
3220 mtx_lock(&devq->send_mtx);
3222 dev->ccbq.dev_openings++;
3223 mtx_unlock(&devq->send_mtx);
3229 xpt_pollwait(union ccb *start_ccb, uint32_t timeout)
3232 KASSERT(cam_sim_pollable(start_ccb->ccb_h.path->bus->sim),
3233 ("%s: non-pollable sim", __func__));
3234 while (--timeout > 0) {
3235 xpt_sim_poll(start_ccb->ccb_h.path->bus->sim);
3236 if ((start_ccb->ccb_h.status & CAM_STATUS_MASK)
3244 * XXX Is it worth adding a sim_timeout entry
3245 * point so we can attempt recovery? If
3246 * this is only used for dumps, I don't think
3249 start_ccb->ccb_h.status = CAM_CMD_TIMEOUT;
3254 xpt_polled_action(union ccb *start_ccb)
3259 timeout = start_ccb->ccb_h.timeout * 10;
3260 dev = start_ccb->ccb_h.path->device;
3262 mtx_unlock(&dev->device_mtx);
3264 timeout = xpt_poll_setup(start_ccb);
3266 xpt_action(start_ccb);
3267 xpt_pollwait(start_ccb, timeout);
3269 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
3272 mtx_lock(&dev->device_mtx);
3276 * Schedule a peripheral driver to receive a ccb when its
3277 * target device has space for more transactions.
3280 xpt_schedule(struct cam_periph *periph, u_int32_t new_priority)
3283 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("xpt_schedule\n"));
3284 cam_periph_assert(periph, MA_OWNED);
3285 if (new_priority < periph->scheduled_priority) {
3286 periph->scheduled_priority = new_priority;
3287 xpt_run_allocq(periph, 0);
3292 * Schedule a device to run on a given queue.
3293 * If the device was inserted as a new entry on the queue,
3294 * return 1 meaning the device queue should be run. If we
3295 * were already queued, implying someone else has already
3296 * started the queue, return 0 so the caller doesn't attempt
3300 xpt_schedule_dev(struct camq *queue, cam_pinfo *pinfo,
3301 u_int32_t new_priority)
3304 u_int32_t old_priority;
3306 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_schedule_dev\n"));
3308 old_priority = pinfo->priority;
3311 * Are we already queued?
3313 if (pinfo->index != CAM_UNQUEUED_INDEX) {
3314 /* Simply reorder based on new priority */
3315 if (new_priority < old_priority) {
3316 camq_change_priority(queue, pinfo->index,
3318 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3319 ("changed priority to %d\n",
3325 /* New entry on the queue */
3326 if (new_priority < old_priority)
3327 pinfo->priority = new_priority;
3329 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3330 ("Inserting onto queue\n"));
3331 pinfo->generation = ++queue->generation;
3332 camq_insert(queue, pinfo);
3339 xpt_run_allocq_task(void *context, int pending)
3341 struct cam_periph *periph = context;
3343 cam_periph_lock(periph);
3344 periph->flags &= ~CAM_PERIPH_RUN_TASK;
3345 xpt_run_allocq(periph, 1);
3346 cam_periph_unlock(periph);
3347 cam_periph_release(periph);
3351 xpt_run_allocq(struct cam_periph *periph, int sleep)
3353 struct cam_ed *device;
3357 cam_periph_assert(periph, MA_OWNED);
3358 if (periph->periph_allocating)
3360 cam_periph_doacquire(periph);
3361 periph->periph_allocating = 1;
3362 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_allocq(%p)\n", periph));
3363 device = periph->path->device;
3366 while ((prio = min(periph->scheduled_priority,
3367 periph->immediate_priority)) != CAM_PRIORITY_NONE &&
3368 (periph->periph_allocated - (ccb != NULL ? 1 : 0) <
3369 device->ccbq.total_openings || prio <= CAM_PRIORITY_OOB)) {
3371 (ccb = xpt_get_ccb_nowait(periph)) == NULL) {
3373 ccb = xpt_get_ccb(periph);
3376 if (periph->flags & CAM_PERIPH_RUN_TASK)
3378 cam_periph_doacquire(periph);
3379 periph->flags |= CAM_PERIPH_RUN_TASK;
3380 taskqueue_enqueue(xsoftc.xpt_taskq,
3381 &periph->periph_run_task);
3384 xpt_setup_ccb(&ccb->ccb_h, periph->path, prio);
3385 if (prio == periph->immediate_priority) {
3386 periph->immediate_priority = CAM_PRIORITY_NONE;
3387 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3388 ("waking cam_periph_getccb()\n"));
3389 SLIST_INSERT_HEAD(&periph->ccb_list, &ccb->ccb_h,
3391 wakeup(&periph->ccb_list);
3393 periph->scheduled_priority = CAM_PRIORITY_NONE;
3394 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3395 ("calling periph_start()\n"));
3396 periph->periph_start(periph, ccb);
3401 xpt_release_ccb(ccb);
3402 periph->periph_allocating = 0;
3403 cam_periph_release_locked(periph);
3407 xpt_run_devq(struct cam_devq *devq)
3411 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_devq\n"));
3413 devq->send_queue.qfrozen_cnt++;
3414 while ((devq->send_queue.entries > 0)
3415 && (devq->send_openings > 0)
3416 && (devq->send_queue.qfrozen_cnt <= 1)) {
3417 struct cam_ed *device;
3418 union ccb *work_ccb;
3419 struct cam_sim *sim;
3420 struct xpt_proto *proto;
3422 device = (struct cam_ed *)camq_remove(&devq->send_queue,
3424 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3425 ("running device %p\n", device));
3427 work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD);
3428 if (work_ccb == NULL) {
3429 printf("device on run queue with no ccbs???\n");
3433 if ((work_ccb->ccb_h.flags & CAM_HIGH_POWER) != 0) {
3434 mtx_lock(&xsoftc.xpt_highpower_lock);
3435 if (xsoftc.num_highpower <= 0) {
3437 * We got a high power command, but we
3438 * don't have any available slots. Freeze
3439 * the device queue until we have a slot
3442 xpt_freeze_devq_device(device, 1);
3443 STAILQ_INSERT_TAIL(&xsoftc.highpowerq, device,
3446 mtx_unlock(&xsoftc.xpt_highpower_lock);
3450 * Consume a high power slot while
3453 xsoftc.num_highpower--;
3455 mtx_unlock(&xsoftc.xpt_highpower_lock);
3457 cam_ccbq_remove_ccb(&device->ccbq, work_ccb);
3458 cam_ccbq_send_ccb(&device->ccbq, work_ccb);
3459 devq->send_openings--;
3460 devq->send_active++;
3461 xpt_schedule_devq(devq, device);
3462 mtx_unlock(&devq->send_mtx);
3464 if ((work_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0) {
3466 * The client wants to freeze the queue
3467 * after this CCB is sent.
3469 xpt_freeze_devq(work_ccb->ccb_h.path, 1);
3472 /* In Target mode, the peripheral driver knows best... */
3473 if (work_ccb->ccb_h.func_code == XPT_SCSI_IO) {
3474 if ((device->inq_flags & SID_CmdQue) != 0
3475 && work_ccb->csio.tag_action != CAM_TAG_ACTION_NONE)
3476 work_ccb->ccb_h.flags |= CAM_TAG_ACTION_VALID;
3479 * Clear this in case of a retried CCB that
3480 * failed due to a rejected tag.
3482 work_ccb->ccb_h.flags &= ~CAM_TAG_ACTION_VALID;
3485 KASSERT(device == work_ccb->ccb_h.path->device,
3486 ("device (%p) / path->device (%p) mismatch",
3487 device, work_ccb->ccb_h.path->device));
3488 proto = xpt_proto_find(device->protocol);
3489 if (proto && proto->ops->debug_out)
3490 proto->ops->debug_out(work_ccb);
3493 * Device queues can be shared among multiple SIM instances
3494 * that reside on different buses. Use the SIM from the
3495 * queued device, rather than the one from the calling bus.
3499 if (mtx && !mtx_owned(mtx))
3503 work_ccb->ccb_h.qos.periph_data = cam_iosched_now();
3504 (*(sim->sim_action))(sim, work_ccb);
3507 mtx_lock(&devq->send_mtx);
3509 devq->send_queue.qfrozen_cnt--;
3513 * This function merges stuff from the src ccb into the dst ccb, while keeping
3514 * important fields in the dst ccb constant.
3517 xpt_merge_ccb(union ccb *dst_ccb, union ccb *src_ccb)
3521 * Pull fields that are valid for peripheral drivers to set
3522 * into the dst CCB along with the CCB "payload".
3524 dst_ccb->ccb_h.retry_count = src_ccb->ccb_h.retry_count;
3525 dst_ccb->ccb_h.func_code = src_ccb->ccb_h.func_code;
3526 dst_ccb->ccb_h.timeout = src_ccb->ccb_h.timeout;
3527 dst_ccb->ccb_h.flags = src_ccb->ccb_h.flags;
3528 bcopy(&(&src_ccb->ccb_h)[1], &(&dst_ccb->ccb_h)[1],
3529 sizeof(union ccb) - sizeof(struct ccb_hdr));
3533 xpt_setup_ccb_flags(struct ccb_hdr *ccb_h, struct cam_path *path,
3534 u_int32_t priority, u_int32_t flags)
3537 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_setup_ccb\n"));
3538 ccb_h->pinfo.priority = priority;
3540 ccb_h->path_id = path->bus->path_id;
3542 ccb_h->target_id = path->target->target_id;
3544 ccb_h->target_id = CAM_TARGET_WILDCARD;
3546 ccb_h->target_lun = path->device->lun_id;
3547 ccb_h->pinfo.generation = ++path->device->ccbq.queue.generation;
3549 ccb_h->target_lun = CAM_TARGET_WILDCARD;
3551 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX;
3552 ccb_h->flags = flags;
3557 xpt_setup_ccb(struct ccb_hdr *ccb_h, struct cam_path *path, u_int32_t priority)
3559 xpt_setup_ccb_flags(ccb_h, path, priority, /*flags*/ 0);
3562 /* Path manipulation functions */
3564 xpt_create_path(struct cam_path **new_path_ptr, struct cam_periph *perph,
3565 path_id_t path_id, target_id_t target_id, lun_id_t lun_id)
3567 struct cam_path *path;
3570 path = (struct cam_path *)malloc(sizeof(*path), M_CAMPATH, M_NOWAIT);
3573 status = CAM_RESRC_UNAVAIL;
3576 status = xpt_compile_path(path, perph, path_id, target_id, lun_id);
3577 if (status != CAM_REQ_CMP) {
3578 free(path, M_CAMPATH);
3581 *new_path_ptr = path;
3586 xpt_create_path_unlocked(struct cam_path **new_path_ptr,
3587 struct cam_periph *periph, path_id_t path_id,
3588 target_id_t target_id, lun_id_t lun_id)
3591 return (xpt_create_path(new_path_ptr, periph, path_id, target_id,
3596 xpt_compile_path(struct cam_path *new_path, struct cam_periph *perph,
3597 path_id_t path_id, target_id_t target_id, lun_id_t lun_id)
3600 struct cam_et *target;
3601 struct cam_ed *device;
3604 status = CAM_REQ_CMP; /* Completed without error */
3605 target = NULL; /* Wildcarded */
3606 device = NULL; /* Wildcarded */
3609 * We will potentially modify the EDT, so block interrupts
3610 * that may attempt to create cam paths.
3612 bus = xpt_find_bus(path_id);
3614 status = CAM_PATH_INVALID;
3617 mtx_lock(&bus->eb_mtx);
3618 target = xpt_find_target(bus, target_id);
3619 if (target == NULL) {
3621 struct cam_et *new_target;
3623 new_target = xpt_alloc_target(bus, target_id);
3624 if (new_target == NULL) {
3625 status = CAM_RESRC_UNAVAIL;
3627 target = new_target;
3631 if (target != NULL) {
3632 device = xpt_find_device(target, lun_id);
3633 if (device == NULL) {
3635 struct cam_ed *new_device;
3638 (*(bus->xport->ops->alloc_device))(bus,
3641 if (new_device == NULL) {
3642 status = CAM_RESRC_UNAVAIL;
3644 device = new_device;
3648 mtx_unlock(&bus->eb_mtx);
3652 * Only touch the user's data if we are successful.
3654 if (status == CAM_REQ_CMP) {
3655 new_path->periph = perph;
3656 new_path->bus = bus;
3657 new_path->target = target;
3658 new_path->device = device;
3659 CAM_DEBUG(new_path, CAM_DEBUG_TRACE, ("xpt_compile_path\n"));
3662 xpt_release_device(device);
3664 xpt_release_target(target);
3666 xpt_release_bus(bus);
3672 xpt_clone_path(struct cam_path **new_path_ptr, struct cam_path *path)
3674 struct cam_path *new_path;
3676 new_path = (struct cam_path *)malloc(sizeof(*path), M_CAMPATH, M_NOWAIT);
3677 if (new_path == NULL)
3678 return(CAM_RESRC_UNAVAIL);
3680 if (path->bus != NULL)
3681 xpt_acquire_bus(path->bus);
3682 if (path->target != NULL)
3683 xpt_acquire_target(path->target);
3684 if (path->device != NULL)
3685 xpt_acquire_device(path->device);
3686 *new_path_ptr = new_path;
3687 return (CAM_REQ_CMP);
3691 xpt_release_path(struct cam_path *path)
3693 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_path\n"));
3694 if (path->device != NULL) {
3695 xpt_release_device(path->device);
3696 path->device = NULL;
3698 if (path->target != NULL) {
3699 xpt_release_target(path->target);
3700 path->target = NULL;
3702 if (path->bus != NULL) {
3703 xpt_release_bus(path->bus);
3709 xpt_free_path(struct cam_path *path)
3712 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_free_path\n"));
3713 xpt_release_path(path);
3714 free(path, M_CAMPATH);
3718 xpt_path_counts(struct cam_path *path, uint32_t *bus_ref,
3719 uint32_t *periph_ref, uint32_t *target_ref, uint32_t *device_ref)
3725 *bus_ref = path->bus->refcount;
3731 *periph_ref = path->periph->refcount;
3738 *target_ref = path->target->refcount;
3744 *device_ref = path->device->refcount;
3751 * Return -1 for failure, 0 for exact match, 1 for match with wildcards
3752 * in path1, 2 for match with wildcards in path2.
3755 xpt_path_comp(struct cam_path *path1, struct cam_path *path2)
3759 if (path1->bus != path2->bus) {
3760 if (path1->bus->path_id == CAM_BUS_WILDCARD)
3762 else if (path2->bus->path_id == CAM_BUS_WILDCARD)
3767 if (path1->target != path2->target) {
3768 if (path1->target->target_id == CAM_TARGET_WILDCARD) {
3771 } else if (path2->target->target_id == CAM_TARGET_WILDCARD)
3776 if (path1->device != path2->device) {
3777 if (path1->device->lun_id == CAM_LUN_WILDCARD) {
3780 } else if (path2->device->lun_id == CAM_LUN_WILDCARD)
3789 xpt_path_comp_dev(struct cam_path *path, struct cam_ed *dev)
3793 if (path->bus != dev->target->bus) {
3794 if (path->bus->path_id == CAM_BUS_WILDCARD)
3796 else if (dev->target->bus->path_id == CAM_BUS_WILDCARD)
3801 if (path->target != dev->target) {
3802 if (path->target->target_id == CAM_TARGET_WILDCARD) {
3805 } else if (dev->target->target_id == CAM_TARGET_WILDCARD)
3810 if (path->device != dev) {
3811 if (path->device->lun_id == CAM_LUN_WILDCARD) {
3814 } else if (dev->lun_id == CAM_LUN_WILDCARD)
3823 xpt_print_path(struct cam_path *path)
3826 char buffer[XPT_PRINT_LEN];
3828 sbuf_new(&sb, buffer, XPT_PRINT_LEN, SBUF_FIXEDLEN);
3829 xpt_path_sbuf(path, &sb);
3831 printf("%s", sbuf_data(&sb));
3836 xpt_print_device(struct cam_ed *device)
3840 printf("(nopath): ");
3842 printf("(noperiph:%s%d:%d:%d:%jx): ", device->sim->sim_name,
3843 device->sim->unit_number,
3844 device->sim->bus_id,
3845 device->target->target_id,
3846 (uintmax_t)device->lun_id);
3851 xpt_print(struct cam_path *path, const char *fmt, ...)
3855 char buffer[XPT_PRINT_LEN];
3857 sbuf_new(&sb, buffer, XPT_PRINT_LEN, SBUF_FIXEDLEN);
3859 xpt_path_sbuf(path, &sb);
3861 sbuf_vprintf(&sb, fmt, ap);
3865 printf("%s", sbuf_data(&sb));
3870 xpt_path_string(struct cam_path *path, char *str, size_t str_len)
3875 sbuf_new(&sb, str, str_len, 0);
3876 len = xpt_path_sbuf(path, &sb);
3882 xpt_path_sbuf(struct cam_path *path, struct sbuf *sb)
3886 sbuf_printf(sb, "(nopath): ");
3888 if (path->periph != NULL)
3889 sbuf_printf(sb, "(%s%d:", path->periph->periph_name,
3890 path->periph->unit_number);
3892 sbuf_printf(sb, "(noperiph:");
3894 if (path->bus != NULL)
3895 sbuf_printf(sb, "%s%d:%d:", path->bus->sim->sim_name,
3896 path->bus->sim->unit_number,
3897 path->bus->sim->bus_id);
3899 sbuf_printf(sb, "nobus:");
3901 if (path->target != NULL)
3902 sbuf_printf(sb, "%d:", path->target->target_id);
3904 sbuf_printf(sb, "X:");
3906 if (path->device != NULL)
3907 sbuf_printf(sb, "%jx): ",
3908 (uintmax_t)path->device->lun_id);
3910 sbuf_printf(sb, "X): ");
3913 return(sbuf_len(sb));
3917 xpt_path_path_id(struct cam_path *path)
3919 return(path->bus->path_id);
3923 xpt_path_target_id(struct cam_path *path)
3925 if (path->target != NULL)
3926 return (path->target->target_id);
3928 return (CAM_TARGET_WILDCARD);
3932 xpt_path_lun_id(struct cam_path *path)
3934 if (path->device != NULL)
3935 return (path->device->lun_id);
3937 return (CAM_LUN_WILDCARD);
3941 xpt_path_sim(struct cam_path *path)
3944 return (path->bus->sim);
3948 xpt_path_periph(struct cam_path *path)
3951 return (path->periph);
3955 * Release a CAM control block for the caller. Remit the cost of the structure
3956 * to the device referenced by the path. If the this device had no 'credits'
3957 * and peripheral drivers have registered async callbacks for this notification
3961 xpt_release_ccb(union ccb *free_ccb)
3963 struct cam_ed *device;
3964 struct cam_periph *periph;
3966 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_release_ccb\n"));
3967 xpt_path_assert(free_ccb->ccb_h.path, MA_OWNED);
3968 device = free_ccb->ccb_h.path->device;
3969 periph = free_ccb->ccb_h.path->periph;
3971 xpt_free_ccb(free_ccb);
3972 periph->periph_allocated--;
3973 cam_ccbq_release_opening(&device->ccbq);
3974 xpt_run_allocq(periph, 0);
3977 /* Functions accessed by SIM drivers */
3979 static struct xpt_xport_ops xport_default_ops = {
3980 .alloc_device = xpt_alloc_device_default,
3981 .action = xpt_action_default,
3982 .async = xpt_dev_async_default,
3984 static struct xpt_xport xport_default = {
3985 .xport = XPORT_UNKNOWN,
3987 .ops = &xport_default_ops,
3990 CAM_XPT_XPORT(xport_default);
3993 * A sim structure, listing the SIM entry points and instance
3994 * identification info is passed to xpt_bus_register to hook the SIM
3995 * into the CAM framework. xpt_bus_register creates a cam_eb entry
3996 * for this new bus and places it in the array of buses and assigns
3997 * it a path_id. The path_id may be influenced by "hard wiring"
3998 * information specified by the user. Once interrupt services are
3999 * available, the bus will be probed.
4002 xpt_bus_register(struct cam_sim *sim, device_t parent, u_int32_t bus)
4004 struct cam_eb *new_bus;
4005 struct cam_eb *old_bus;
4006 struct ccb_pathinq cpi;
4007 struct cam_path *path;
4011 new_bus = (struct cam_eb *)malloc(sizeof(*new_bus),
4012 M_CAMXPT, M_NOWAIT|M_ZERO);
4013 if (new_bus == NULL) {
4014 /* Couldn't satisfy request */
4015 return (CAM_RESRC_UNAVAIL);
4018 mtx_init(&new_bus->eb_mtx, "CAM bus lock", NULL, MTX_DEF);
4019 TAILQ_INIT(&new_bus->et_entries);
4022 timevalclear(&new_bus->last_reset);
4024 new_bus->refcount = 1; /* Held until a bus_deregister event */
4025 new_bus->generation = 0;
4028 sim->path_id = new_bus->path_id =
4029 xptpathid(sim->sim_name, sim->unit_number, sim->bus_id);
4030 old_bus = TAILQ_FIRST(&xsoftc.xpt_busses);
4031 while (old_bus != NULL
4032 && old_bus->path_id < new_bus->path_id)
4033 old_bus = TAILQ_NEXT(old_bus, links);
4034 if (old_bus != NULL)
4035 TAILQ_INSERT_BEFORE(old_bus, new_bus, links);
4037 TAILQ_INSERT_TAIL(&xsoftc.xpt_busses, new_bus, links);
4038 xsoftc.bus_generation++;
4042 * Set a default transport so that a PATH_INQ can be issued to
4043 * the SIM. This will then allow for probing and attaching of
4044 * a more appropriate transport.
4046 new_bus->xport = &xport_default;
4048 status = xpt_create_path(&path, /*periph*/NULL, sim->path_id,
4049 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
4050 if (status != CAM_REQ_CMP) {
4051 xpt_release_bus(new_bus);
4052 return (CAM_RESRC_UNAVAIL);
4055 xpt_path_inq(&cpi, path);
4057 if (cpi.ccb_h.status == CAM_REQ_CMP) {
4058 struct xpt_xport **xpt;
4060 SET_FOREACH(xpt, cam_xpt_xport_set) {
4061 if ((*xpt)->xport == cpi.transport) {
4062 new_bus->xport = *xpt;
4066 if (new_bus->xport == NULL) {
4068 "No transport found for %d\n", cpi.transport);
4069 xpt_release_bus(new_bus);
4070 free(path, M_CAMXPT);
4071 return (CAM_RESRC_UNAVAIL);
4075 /* Notify interested parties */
4076 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 xpt_done(union ccb *done_ccb)
4609 struct cam_doneq *queue;
4612 #if defined(BUF_TRACKING) || defined(FULL_BUF_TRACKING)
4613 if (done_ccb->ccb_h.func_code == XPT_SCSI_IO &&
4614 done_ccb->csio.bio != NULL)
4615 biotrack(done_ccb->csio.bio, __func__);
4618 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE,
4619 ("xpt_done: func= %#x %s status %#x\n",
4620 done_ccb->ccb_h.func_code,
4621 xpt_action_name(done_ccb->ccb_h.func_code),
4622 done_ccb->ccb_h.status));
4623 if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) == 0)
4626 /* Store the time the ccb was in the sim */
4627 done_ccb->ccb_h.qos.periph_data = cam_iosched_delta_t(done_ccb->ccb_h.qos.periph_data);
4628 hash = (u_int)(done_ccb->ccb_h.path_id + done_ccb->ccb_h.target_id +
4629 done_ccb->ccb_h.target_lun) % cam_num_doneqs;
4630 queue = &cam_doneqs[hash];
4631 mtx_lock(&queue->cam_doneq_mtx);
4632 run = (queue->cam_doneq_sleep && STAILQ_EMPTY(&queue->cam_doneq));
4633 STAILQ_INSERT_TAIL(&queue->cam_doneq, &done_ccb->ccb_h, sim_links.stqe);
4634 done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX;
4635 mtx_unlock(&queue->cam_doneq_mtx);
4637 wakeup(&queue->cam_doneq);
4641 xpt_done_direct(union ccb *done_ccb)
4644 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE,
4645 ("xpt_done_direct: status %#x\n", done_ccb->ccb_h.status));
4646 if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) == 0)
4649 /* Store the time the ccb was in the sim */
4650 done_ccb->ccb_h.qos.periph_data = cam_iosched_delta_t(done_ccb->ccb_h.qos.periph_data);
4651 xpt_done_process(&done_ccb->ccb_h);
4659 new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_WAITOK);
4664 xpt_alloc_ccb_nowait(void)
4668 new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_NOWAIT);
4673 xpt_free_ccb(union ccb *free_ccb)
4675 free(free_ccb, M_CAMCCB);
4678 /* Private XPT functions */
4681 * Get a CAM control block for the caller. Charge the structure to the device
4682 * referenced by the path. If we don't have sufficient resources to allocate
4683 * more ccbs, we return NULL.
4686 xpt_get_ccb_nowait(struct cam_periph *periph)
4690 new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_NOWAIT);
4691 if (new_ccb == NULL)
4693 periph->periph_allocated++;
4694 cam_ccbq_take_opening(&periph->path->device->ccbq);
4699 xpt_get_ccb(struct cam_periph *periph)
4703 cam_periph_unlock(periph);
4704 new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_WAITOK);
4705 cam_periph_lock(periph);
4706 periph->periph_allocated++;
4707 cam_ccbq_take_opening(&periph->path->device->ccbq);
4712 cam_periph_getccb(struct cam_periph *periph, u_int32_t priority)
4714 struct ccb_hdr *ccb_h;
4716 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("cam_periph_getccb\n"));
4717 cam_periph_assert(periph, MA_OWNED);
4718 while ((ccb_h = SLIST_FIRST(&periph->ccb_list)) == NULL ||
4719 ccb_h->pinfo.priority != priority) {
4720 if (priority < periph->immediate_priority) {
4721 periph->immediate_priority = priority;
4722 xpt_run_allocq(periph, 0);
4724 cam_periph_sleep(periph, &periph->ccb_list, PRIBIO,
4727 SLIST_REMOVE_HEAD(&periph->ccb_list, periph_links.sle);
4728 return ((union ccb *)ccb_h);
4732 xpt_acquire_bus(struct cam_eb *bus)
4741 xpt_release_bus(struct cam_eb *bus)
4745 KASSERT(bus->refcount >= 1, ("bus->refcount >= 1"));
4746 if (--bus->refcount > 0) {
4750 TAILQ_REMOVE(&xsoftc.xpt_busses, bus, links);
4751 xsoftc.bus_generation++;
4753 KASSERT(TAILQ_EMPTY(&bus->et_entries),
4754 ("destroying bus, but target list is not empty"));
4755 cam_sim_release(bus->sim);
4756 mtx_destroy(&bus->eb_mtx);
4757 free(bus, M_CAMXPT);
4760 static struct cam_et *
4761 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id)
4763 struct cam_et *cur_target, *target;
4765 mtx_assert(&xsoftc.xpt_topo_lock, MA_OWNED);
4766 mtx_assert(&bus->eb_mtx, MA_OWNED);
4767 target = (struct cam_et *)malloc(sizeof(*target), M_CAMXPT,
4772 TAILQ_INIT(&target->ed_entries);
4774 target->target_id = target_id;
4775 target->refcount = 1;
4776 target->generation = 0;
4777 target->luns = NULL;
4778 mtx_init(&target->luns_mtx, "CAM LUNs lock", NULL, MTX_DEF);
4779 timevalclear(&target->last_reset);
4781 * Hold a reference to our parent bus so it
4782 * will not go away before we do.
4786 /* Insertion sort into our bus's target list */
4787 cur_target = TAILQ_FIRST(&bus->et_entries);
4788 while (cur_target != NULL && cur_target->target_id < target_id)
4789 cur_target = TAILQ_NEXT(cur_target, links);
4790 if (cur_target != NULL) {
4791 TAILQ_INSERT_BEFORE(cur_target, target, links);
4793 TAILQ_INSERT_TAIL(&bus->et_entries, target, links);
4800 xpt_acquire_target(struct cam_et *target)
4802 struct cam_eb *bus = target->bus;
4804 mtx_lock(&bus->eb_mtx);
4806 mtx_unlock(&bus->eb_mtx);
4810 xpt_release_target(struct cam_et *target)
4812 struct cam_eb *bus = target->bus;
4814 mtx_lock(&bus->eb_mtx);
4815 if (--target->refcount > 0) {
4816 mtx_unlock(&bus->eb_mtx);
4819 TAILQ_REMOVE(&bus->et_entries, target, links);
4821 mtx_unlock(&bus->eb_mtx);
4822 KASSERT(TAILQ_EMPTY(&target->ed_entries),
4823 ("destroying target, but device list is not empty"));
4824 xpt_release_bus(bus);
4825 mtx_destroy(&target->luns_mtx);
4827 free(target->luns, M_CAMXPT);
4828 free(target, M_CAMXPT);
4831 static struct cam_ed *
4832 xpt_alloc_device_default(struct cam_eb *bus, struct cam_et *target,
4835 struct cam_ed *device;
4837 device = xpt_alloc_device(bus, target, lun_id);
4841 device->mintags = 1;
4842 device->maxtags = 1;
4847 xpt_destroy_device(void *context, int pending)
4849 struct cam_ed *device = context;
4851 mtx_lock(&device->device_mtx);
4852 mtx_destroy(&device->device_mtx);
4853 free(device, M_CAMDEV);
4857 xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, lun_id_t lun_id)
4859 struct cam_ed *cur_device, *device;
4860 struct cam_devq *devq;
4863 mtx_assert(&bus->eb_mtx, MA_OWNED);
4864 /* Make space for us in the device queue on our bus */
4865 devq = bus->sim->devq;
4866 mtx_lock(&devq->send_mtx);
4867 status = cam_devq_resize(devq, devq->send_queue.array_size + 1);
4868 mtx_unlock(&devq->send_mtx);
4869 if (status != CAM_REQ_CMP)
4872 device = (struct cam_ed *)malloc(sizeof(*device),
4873 M_CAMDEV, M_NOWAIT|M_ZERO);
4877 cam_init_pinfo(&device->devq_entry);
4878 device->target = target;
4879 device->lun_id = lun_id;
4880 device->sim = bus->sim;
4881 if (cam_ccbq_init(&device->ccbq,
4882 bus->sim->max_dev_openings) != 0) {
4883 free(device, M_CAMDEV);
4886 SLIST_INIT(&device->asyncs);
4887 SLIST_INIT(&device->periphs);
4888 device->generation = 0;
4889 device->flags = CAM_DEV_UNCONFIGURED;
4890 device->tag_delay_count = 0;
4891 device->tag_saved_openings = 0;
4892 device->refcount = 1;
4893 mtx_init(&device->device_mtx, "CAM device lock", NULL, MTX_DEF);
4894 callout_init_mtx(&device->callout, &devq->send_mtx, 0);
4895 TASK_INIT(&device->device_destroy_task, 0, xpt_destroy_device, device);
4897 * Hold a reference to our parent bus so it
4898 * will not go away before we do.
4902 cur_device = TAILQ_FIRST(&target->ed_entries);
4903 while (cur_device != NULL && cur_device->lun_id < lun_id)
4904 cur_device = TAILQ_NEXT(cur_device, links);
4905 if (cur_device != NULL)
4906 TAILQ_INSERT_BEFORE(cur_device, device, links);
4908 TAILQ_INSERT_TAIL(&target->ed_entries, device, links);
4909 target->generation++;
4914 xpt_acquire_device(struct cam_ed *device)
4916 struct cam_eb *bus = device->target->bus;
4918 mtx_lock(&bus->eb_mtx);
4920 mtx_unlock(&bus->eb_mtx);
4924 xpt_release_device(struct cam_ed *device)
4926 struct cam_eb *bus = device->target->bus;
4927 struct cam_devq *devq;
4929 mtx_lock(&bus->eb_mtx);
4930 if (--device->refcount > 0) {
4931 mtx_unlock(&bus->eb_mtx);
4935 TAILQ_REMOVE(&device->target->ed_entries, device,links);
4936 device->target->generation++;
4937 mtx_unlock(&bus->eb_mtx);
4939 /* Release our slot in the devq */
4940 devq = bus->sim->devq;
4941 mtx_lock(&devq->send_mtx);
4942 cam_devq_resize(devq, devq->send_queue.array_size - 1);
4944 KASSERT(SLIST_EMPTY(&device->periphs),
4945 ("destroying device, but periphs list is not empty"));
4946 KASSERT(device->devq_entry.index == CAM_UNQUEUED_INDEX,
4947 ("destroying device while still queued for ccbs"));
4949 /* The send_mtx must be held when accessing the callout */
4950 if ((device->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0)
4951 callout_stop(&device->callout);
4953 mtx_unlock(&devq->send_mtx);
4955 xpt_release_target(device->target);
4957 cam_ccbq_fini(&device->ccbq);
4959 * Free allocated memory. free(9) does nothing if the
4960 * supplied pointer is NULL, so it is safe to call without
4963 free(device->supported_vpds, M_CAMXPT);
4964 free(device->device_id, M_CAMXPT);
4965 free(device->ext_inq, M_CAMXPT);
4966 free(device->physpath, M_CAMXPT);
4967 free(device->rcap_buf, M_CAMXPT);
4968 free(device->serial_num, M_CAMXPT);
4969 free(device->nvme_data, M_CAMXPT);
4970 free(device->nvme_cdata, M_CAMXPT);
4971 taskqueue_enqueue(xsoftc.xpt_taskq, &device->device_destroy_task);
4975 xpt_dev_ccbq_resize(struct cam_path *path, int newopenings)
4981 mtx_lock(&dev->sim->devq->send_mtx);
4982 result = cam_ccbq_resize(&dev->ccbq, newopenings);
4983 mtx_unlock(&dev->sim->devq->send_mtx);
4984 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
4985 || (dev->inq_flags & SID_CmdQue) != 0)
4986 dev->tag_saved_openings = newopenings;
4990 static struct cam_eb *
4991 xpt_find_bus(path_id_t path_id)
4996 for (bus = TAILQ_FIRST(&xsoftc.xpt_busses);
4998 bus = TAILQ_NEXT(bus, links)) {
4999 if (bus->path_id == path_id) {
5008 static struct cam_et *
5009 xpt_find_target(struct cam_eb *bus, target_id_t target_id)
5011 struct cam_et *target;
5013 mtx_assert(&bus->eb_mtx, MA_OWNED);
5014 for (target = TAILQ_FIRST(&bus->et_entries);
5016 target = TAILQ_NEXT(target, links)) {
5017 if (target->target_id == target_id) {
5025 static struct cam_ed *
5026 xpt_find_device(struct cam_et *target, lun_id_t lun_id)
5028 struct cam_ed *device;
5030 mtx_assert(&target->bus->eb_mtx, MA_OWNED);
5031 for (device = TAILQ_FIRST(&target->ed_entries);
5033 device = TAILQ_NEXT(device, links)) {
5034 if (device->lun_id == lun_id) {
5043 xpt_start_tags(struct cam_path *path)
5045 struct ccb_relsim crs;
5046 struct cam_ed *device;
5047 struct cam_sim *sim;
5050 device = path->device;
5051 sim = path->bus->sim;
5052 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT;
5053 xpt_freeze_devq(path, /*count*/1);
5054 device->inq_flags |= SID_CmdQue;
5055 if (device->tag_saved_openings != 0)
5056 newopenings = device->tag_saved_openings;
5058 newopenings = min(device->maxtags,
5059 sim->max_tagged_dev_openings);
5060 xpt_dev_ccbq_resize(path, newopenings);
5061 xpt_async(AC_GETDEV_CHANGED, path, NULL);
5062 xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL);
5063 crs.ccb_h.func_code = XPT_REL_SIMQ;
5064 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY;
5066 = crs.release_timeout
5069 xpt_action((union ccb *)&crs);
5073 xpt_stop_tags(struct cam_path *path)
5075 struct ccb_relsim crs;
5076 struct cam_ed *device;
5077 struct cam_sim *sim;
5079 device = path->device;
5080 sim = path->bus->sim;
5081 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT;
5082 device->tag_delay_count = 0;
5083 xpt_freeze_devq(path, /*count*/1);
5084 device->inq_flags &= ~SID_CmdQue;
5085 xpt_dev_ccbq_resize(path, sim->max_dev_openings);
5086 xpt_async(AC_GETDEV_CHANGED, path, NULL);
5087 xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL);
5088 crs.ccb_h.func_code = XPT_REL_SIMQ;
5089 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY;
5091 = crs.release_timeout
5094 xpt_action((union ccb *)&crs);
5098 * Assume all possible buses are detected by this time, so allow boot
5099 * as soon as they all are scanned.
5102 xpt_boot_delay(void *arg)
5109 * Now that all config hooks have completed, start boot_delay timer,
5110 * waiting for possibly still undetected buses (USB) to appear.
5113 xpt_ch_done(void *arg)
5116 callout_init(&xsoftc.boot_callout, 1);
5117 callout_reset_sbt(&xsoftc.boot_callout, SBT_1MS * xsoftc.boot_delay, 0,
5118 xpt_boot_delay, NULL, 0);
5120 SYSINIT(xpt_hw_delay, SI_SUB_INT_CONFIG_HOOKS, SI_ORDER_ANY, xpt_ch_done, NULL);
5123 * Now that interrupts are enabled, go find our devices
5126 xpt_config(void *arg)
5128 if (taskqueue_start_threads(&xsoftc.xpt_taskq, 1, PRIBIO, "CAM taskq"))
5129 printf("xpt_config: failed to create taskqueue thread.\n");
5131 /* Setup debugging path */
5132 if (cam_dflags != CAM_DEBUG_NONE) {
5133 if (xpt_create_path(&cam_dpath, NULL,
5134 CAM_DEBUG_BUS, CAM_DEBUG_TARGET,
5135 CAM_DEBUG_LUN) != CAM_REQ_CMP) {
5136 printf("xpt_config: xpt_create_path() failed for debug"
5137 " target %d:%d:%d, debugging disabled\n",
5138 CAM_DEBUG_BUS, CAM_DEBUG_TARGET, CAM_DEBUG_LUN);
5139 cam_dflags = CAM_DEBUG_NONE;
5144 periphdriver_init(1);
5147 /* Fire up rescan thread. */
5148 if (kproc_kthread_add(xpt_scanner_thread, NULL, &cam_proc, NULL, 0, 0,
5149 "cam", "scanner")) {
5150 printf("xpt_config: failed to create rescan thread.\n");
5155 xpt_hold_boot_locked(void)
5158 if (xsoftc.buses_to_config++ == 0)
5159 root_mount_hold_token("CAM", &xsoftc.xpt_rootmount);
5167 xpt_hold_boot_locked();
5172 xpt_release_boot(void)
5176 if (--xsoftc.buses_to_config == 0) {
5177 if (xsoftc.buses_config_done == 0) {
5178 xsoftc.buses_config_done = 1;
5179 xsoftc.buses_to_config++;
5180 TASK_INIT(&xsoftc.boot_task, 0, xpt_finishconfig_task,
5182 taskqueue_enqueue(taskqueue_thread, &xsoftc.boot_task);
5184 root_mount_rel(&xsoftc.xpt_rootmount);
5190 * If the given device only has one peripheral attached to it, and if that
5191 * peripheral is the passthrough driver, announce it. This insures that the
5192 * user sees some sort of announcement for every peripheral in their system.
5195 xptpassannouncefunc(struct cam_ed *device, void *arg)
5197 struct cam_periph *periph;
5200 for (periph = SLIST_FIRST(&device->periphs), i = 0; periph != NULL;
5201 periph = SLIST_NEXT(periph, periph_links), i++);
5203 periph = SLIST_FIRST(&device->periphs);
5205 && (strncmp(periph->periph_name, "pass", 4) == 0))
5206 xpt_announce_periph(periph, NULL);
5212 xpt_finishconfig_task(void *context, int pending)
5215 periphdriver_init(2);
5217 * Check for devices with no "standard" peripheral driver
5218 * attached. For any devices like that, announce the
5219 * passthrough driver so the user will see something.
5222 xpt_for_all_devices(xptpassannouncefunc, NULL);
5228 xpt_register_async(int event, ac_callback_t *cbfunc, void *cbarg,
5229 struct cam_path *path)
5231 struct ccb_setasync csa;
5236 status = xpt_create_path(&path, /*periph*/NULL, CAM_XPT_PATH_ID,
5237 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
5238 if (status != CAM_REQ_CMP)
5240 xpt_path_lock(path);
5244 xpt_setup_ccb(&csa.ccb_h, path, CAM_PRIORITY_NORMAL);
5245 csa.ccb_h.func_code = XPT_SASYNC_CB;
5246 csa.event_enable = event;
5247 csa.callback = cbfunc;
5248 csa.callback_arg = cbarg;
5249 xpt_action((union ccb *)&csa);
5250 status = csa.ccb_h.status;
5252 CAM_DEBUG(csa.ccb_h.path, CAM_DEBUG_TRACE,
5253 ("xpt_register_async: func %p\n", cbfunc));
5256 xpt_path_unlock(path);
5257 xpt_free_path(path);
5260 if ((status == CAM_REQ_CMP) &&
5261 (csa.event_enable & AC_FOUND_DEVICE)) {
5263 * Get this peripheral up to date with all
5264 * the currently existing devices.
5266 xpt_for_all_devices(xptsetasyncfunc, &csa);
5268 if ((status == CAM_REQ_CMP) &&
5269 (csa.event_enable & AC_PATH_REGISTERED)) {
5271 * Get this peripheral up to date with all
5272 * the currently existing buses.
5274 xpt_for_all_busses(xptsetasyncbusfunc, &csa);
5281 xptaction(struct cam_sim *sim, union ccb *work_ccb)
5283 CAM_DEBUG(work_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xptaction\n"));
5285 switch (work_ccb->ccb_h.func_code) {
5286 /* Common cases first */
5287 case XPT_PATH_INQ: /* Path routing inquiry */
5289 struct ccb_pathinq *cpi;
5291 cpi = &work_ccb->cpi;
5292 cpi->version_num = 1; /* XXX??? */
5293 cpi->hba_inquiry = 0;
5294 cpi->target_sprt = 0;
5296 cpi->hba_eng_cnt = 0;
5297 cpi->max_target = 0;
5299 cpi->initiator_id = 0;
5300 strlcpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
5301 strlcpy(cpi->hba_vid, "", HBA_IDLEN);
5302 strlcpy(cpi->dev_name, sim->sim_name, DEV_IDLEN);
5303 cpi->unit_number = sim->unit_number;
5304 cpi->bus_id = sim->bus_id;
5305 cpi->base_transfer_speed = 0;
5306 cpi->protocol = PROTO_UNSPECIFIED;
5307 cpi->protocol_version = PROTO_VERSION_UNSPECIFIED;
5308 cpi->transport = XPORT_UNSPECIFIED;
5309 cpi->transport_version = XPORT_VERSION_UNSPECIFIED;
5310 cpi->ccb_h.status = CAM_REQ_CMP;
5314 work_ccb->ccb_h.status = CAM_REQ_INVALID;
5321 * The xpt as a "controller" has no interrupt sources, so polling
5325 xptpoll(struct cam_sim *sim)
5330 xpt_lock_buses(void)
5332 mtx_lock(&xsoftc.xpt_topo_lock);
5336 xpt_unlock_buses(void)
5338 mtx_unlock(&xsoftc.xpt_topo_lock);
5342 xpt_path_mtx(struct cam_path *path)
5345 return (&path->device->device_mtx);
5349 xpt_done_process(struct ccb_hdr *ccb_h)
5351 struct cam_sim *sim = NULL;
5352 struct cam_devq *devq = NULL;
5353 struct mtx *mtx = NULL;
5355 #if defined(BUF_TRACKING) || defined(FULL_BUF_TRACKING)
5356 struct ccb_scsiio *csio;
5358 if (ccb_h->func_code == XPT_SCSI_IO) {
5359 csio = &((union ccb *)ccb_h)->csio;
5360 if (csio->bio != NULL)
5361 biotrack(csio->bio, __func__);
5365 if (ccb_h->flags & CAM_HIGH_POWER) {
5366 struct highpowerlist *hphead;
5367 struct cam_ed *device;
5369 mtx_lock(&xsoftc.xpt_highpower_lock);
5370 hphead = &xsoftc.highpowerq;
5372 device = STAILQ_FIRST(hphead);
5375 * Increment the count since this command is done.
5377 xsoftc.num_highpower++;
5380 * Any high powered commands queued up?
5382 if (device != NULL) {
5383 STAILQ_REMOVE_HEAD(hphead, highpowerq_entry);
5384 mtx_unlock(&xsoftc.xpt_highpower_lock);
5386 mtx_lock(&device->sim->devq->send_mtx);
5387 xpt_release_devq_device(device,
5388 /*count*/1, /*runqueue*/TRUE);
5389 mtx_unlock(&device->sim->devq->send_mtx);
5391 mtx_unlock(&xsoftc.xpt_highpower_lock);
5395 * Insulate against a race where the periph is destroyed but CCBs are
5396 * still not all processed. This shouldn't happen, but allows us better
5397 * bug diagnostic when it does.
5399 if (ccb_h->path->bus)
5400 sim = ccb_h->path->bus->sim;
5402 if (ccb_h->status & CAM_RELEASE_SIMQ) {
5403 KASSERT(sim, ("sim missing for CAM_RELEASE_SIMQ request"));
5404 xpt_release_simq(sim, /*run_queue*/FALSE);
5405 ccb_h->status &= ~CAM_RELEASE_SIMQ;
5408 if ((ccb_h->flags & CAM_DEV_QFRZDIS)
5409 && (ccb_h->status & CAM_DEV_QFRZN)) {
5410 xpt_release_devq(ccb_h->path, /*count*/1, /*run_queue*/TRUE);
5411 ccb_h->status &= ~CAM_DEV_QFRZN;
5414 if ((ccb_h->func_code & XPT_FC_USER_CCB) == 0) {
5415 struct cam_ed *dev = ccb_h->path->device;
5419 KASSERT(devq, ("Periph disappeared with CCB %p %s request pending.",
5420 ccb_h, xpt_action_name(ccb_h->func_code)));
5422 mtx_lock(&devq->send_mtx);
5423 devq->send_active--;
5424 devq->send_openings++;
5425 cam_ccbq_ccb_done(&dev->ccbq, (union ccb *)ccb_h);
5427 if (((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0
5428 && (dev->ccbq.dev_active == 0))) {
5429 dev->flags &= ~CAM_DEV_REL_ON_QUEUE_EMPTY;
5430 xpt_release_devq_device(dev, /*count*/1,
5431 /*run_queue*/FALSE);
5434 if (((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0
5435 && (ccb_h->status&CAM_STATUS_MASK) != CAM_REQUEUE_REQ)) {
5436 dev->flags &= ~CAM_DEV_REL_ON_COMPLETE;
5437 xpt_release_devq_device(dev, /*count*/1,
5438 /*run_queue*/FALSE);
5441 if (!device_is_queued(dev))
5442 (void)xpt_schedule_devq(devq, dev);
5444 mtx_unlock(&devq->send_mtx);
5446 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0) {
5447 mtx = xpt_path_mtx(ccb_h->path);
5450 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
5451 && (--dev->tag_delay_count == 0))
5452 xpt_start_tags(ccb_h->path);
5456 if ((ccb_h->flags & CAM_UNLOCKED) == 0) {
5458 mtx = xpt_path_mtx(ccb_h->path);
5468 /* Call the peripheral driver's callback */
5469 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX;
5470 (*ccb_h->cbfcnp)(ccb_h->path->periph, (union ccb *)ccb_h);
5476 xpt_done_td(void *arg)
5478 struct cam_doneq *queue = arg;
5479 struct ccb_hdr *ccb_h;
5480 STAILQ_HEAD(, ccb_hdr) doneq;
5482 STAILQ_INIT(&doneq);
5483 mtx_lock(&queue->cam_doneq_mtx);
5485 while (STAILQ_EMPTY(&queue->cam_doneq)) {
5486 queue->cam_doneq_sleep = 1;
5487 msleep(&queue->cam_doneq, &queue->cam_doneq_mtx,
5489 queue->cam_doneq_sleep = 0;
5491 STAILQ_CONCAT(&doneq, &queue->cam_doneq);
5492 mtx_unlock(&queue->cam_doneq_mtx);
5494 THREAD_NO_SLEEPING();
5495 while ((ccb_h = STAILQ_FIRST(&doneq)) != NULL) {
5496 STAILQ_REMOVE_HEAD(&doneq, sim_links.stqe);
5497 xpt_done_process(ccb_h);
5499 THREAD_SLEEPING_OK();
5501 mtx_lock(&queue->cam_doneq_mtx);
5506 camisr_runqueue(void)
5508 struct ccb_hdr *ccb_h;
5509 struct cam_doneq *queue;
5512 /* Process global queues. */
5513 for (i = 0; i < cam_num_doneqs; i++) {
5514 queue = &cam_doneqs[i];
5515 mtx_lock(&queue->cam_doneq_mtx);
5516 while ((ccb_h = STAILQ_FIRST(&queue->cam_doneq)) != NULL) {
5517 STAILQ_REMOVE_HEAD(&queue->cam_doneq, sim_links.stqe);
5518 mtx_unlock(&queue->cam_doneq_mtx);
5519 xpt_done_process(ccb_h);
5520 mtx_lock(&queue->cam_doneq_mtx);
5522 mtx_unlock(&queue->cam_doneq_mtx);
5532 static struct kv map[] = {
5533 { XPT_NOOP, "XPT_NOOP" },
5534 { XPT_SCSI_IO, "XPT_SCSI_IO" },
5535 { XPT_GDEV_TYPE, "XPT_GDEV_TYPE" },
5536 { XPT_GDEVLIST, "XPT_GDEVLIST" },
5537 { XPT_PATH_INQ, "XPT_PATH_INQ" },
5538 { XPT_REL_SIMQ, "XPT_REL_SIMQ" },
5539 { XPT_SASYNC_CB, "XPT_SASYNC_CB" },
5540 { XPT_SDEV_TYPE, "XPT_SDEV_TYPE" },
5541 { XPT_SCAN_BUS, "XPT_SCAN_BUS" },
5542 { XPT_DEV_MATCH, "XPT_DEV_MATCH" },
5543 { XPT_DEBUG, "XPT_DEBUG" },
5544 { XPT_PATH_STATS, "XPT_PATH_STATS" },
5545 { XPT_GDEV_STATS, "XPT_GDEV_STATS" },
5546 { XPT_DEV_ADVINFO, "XPT_DEV_ADVINFO" },
5547 { XPT_ASYNC, "XPT_ASYNC" },
5548 { XPT_ABORT, "XPT_ABORT" },
5549 { XPT_RESET_BUS, "XPT_RESET_BUS" },
5550 { XPT_RESET_DEV, "XPT_RESET_DEV" },
5551 { XPT_TERM_IO, "XPT_TERM_IO" },
5552 { XPT_SCAN_LUN, "XPT_SCAN_LUN" },
5553 { XPT_GET_TRAN_SETTINGS, "XPT_GET_TRAN_SETTINGS" },
5554 { XPT_SET_TRAN_SETTINGS, "XPT_SET_TRAN_SETTINGS" },
5555 { XPT_CALC_GEOMETRY, "XPT_CALC_GEOMETRY" },
5556 { XPT_ATA_IO, "XPT_ATA_IO" },
5557 { XPT_GET_SIM_KNOB, "XPT_GET_SIM_KNOB" },
5558 { XPT_SET_SIM_KNOB, "XPT_SET_SIM_KNOB" },
5559 { XPT_NVME_IO, "XPT_NVME_IO" },
5560 { XPT_MMC_IO, "XPT_MMC_IO" },
5561 { XPT_SMP_IO, "XPT_SMP_IO" },
5562 { XPT_SCAN_TGT, "XPT_SCAN_TGT" },
5563 { XPT_NVME_ADMIN, "XPT_NVME_ADMIN" },
5564 { XPT_ENG_INQ, "XPT_ENG_INQ" },
5565 { XPT_ENG_EXEC, "XPT_ENG_EXEC" },
5566 { XPT_EN_LUN, "XPT_EN_LUN" },
5567 { XPT_TARGET_IO, "XPT_TARGET_IO" },
5568 { XPT_ACCEPT_TARGET_IO, "XPT_ACCEPT_TARGET_IO" },
5569 { XPT_CONT_TARGET_IO, "XPT_CONT_TARGET_IO" },
5570 { XPT_IMMED_NOTIFY, "XPT_IMMED_NOTIFY" },
5571 { XPT_NOTIFY_ACK, "XPT_NOTIFY_ACK" },
5572 { XPT_IMMEDIATE_NOTIFY, "XPT_IMMEDIATE_NOTIFY" },
5573 { XPT_NOTIFY_ACKNOWLEDGE, "XPT_NOTIFY_ACKNOWLEDGE" },
5578 xpt_action_name(uint32_t action)
5580 static char buffer[32]; /* Only for unknown messages -- racy */
5581 struct kv *walker = map;
5583 while (walker->name != NULL) {
5584 if (walker->v == action)
5585 return (walker->name);
5589 snprintf(buffer, sizeof(buffer), "%#x", action);