FreeBSD/Linux Kernel Cross Reference
sys/cam/cam_xpt.c
1 /*-
2 * Implementation of the Common Access Method Transport (XPT) layer.
3 *
4 * Copyright (c) 1997, 1998, 1999 Justin T. Gibbs.
5 * Copyright (c) 1997, 1998, 1999 Kenneth D. Merry.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions, and the following disclaimer,
13 * without modification, immediately at the beginning of the file.
14 * 2. The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
21 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD$");
32
33 #include <sys/param.h>
34 #include <sys/bus.h>
35 #include <sys/systm.h>
36 #include <sys/types.h>
37 #include <sys/malloc.h>
38 #include <sys/kernel.h>
39 #include <sys/time.h>
40 #include <sys/conf.h>
41 #include <sys/fcntl.h>
42 #include <sys/interrupt.h>
43 #include <sys/sbuf.h>
44 #include <sys/taskqueue.h>
45
46 #include <sys/lock.h>
47 #include <sys/mutex.h>
48 #include <sys/sysctl.h>
49 #include <sys/kthread.h>
50
51 #include <cam/cam.h>
52 #include <cam/cam_ccb.h>
53 #include <cam/cam_periph.h>
54 #include <cam/cam_queue.h>
55 #include <cam/cam_sim.h>
56 #include <cam/cam_xpt.h>
57 #include <cam/cam_xpt_sim.h>
58 #include <cam/cam_xpt_periph.h>
59 #include <cam/cam_xpt_internal.h>
60 #include <cam/cam_debug.h>
61 #include <cam/cam_compat.h>
62
63 #include <cam/scsi/scsi_all.h>
64 #include <cam/scsi/scsi_message.h>
65 #include <cam/scsi/scsi_pass.h>
66
67 #include <machine/md_var.h> /* geometry translation */
68 #include <machine/stdarg.h> /* for xpt_print below */
69
70 #include "opt_cam.h"
71
72 /*
73 * This is the maximum number of high powered commands (e.g. start unit)
74 * that can be outstanding at a particular time.
75 */
76 #ifndef CAM_MAX_HIGHPOWER
77 #define CAM_MAX_HIGHPOWER 4
78 #endif
79
80 /* Datastructures internal to the xpt layer */
81 MALLOC_DEFINE(M_CAMXPT, "CAM XPT", "CAM XPT buffers");
82 MALLOC_DEFINE(M_CAMDEV, "CAM DEV", "CAM devices");
83 MALLOC_DEFINE(M_CAMCCB, "CAM CCB", "CAM CCBs");
84 MALLOC_DEFINE(M_CAMPATH, "CAM path", "CAM paths");
85
86 /* Object for defering XPT actions to a taskqueue */
87 struct xpt_task {
88 struct task task;
89 void *data1;
90 uintptr_t data2;
91 };
92
93 typedef enum {
94 XPT_FLAG_OPEN = 0x01
95 } xpt_flags;
96
97 struct xpt_softc {
98 xpt_flags flags;
99
100 /* number of high powered commands that can go through right now */
101 STAILQ_HEAD(highpowerlist, cam_ed) highpowerq;
102 int num_highpower;
103
104 /* queue for handling async rescan requests. */
105 TAILQ_HEAD(, ccb_hdr) ccb_scanq;
106 int buses_to_config;
107 int buses_config_done;
108
109 /* Registered busses */
110 TAILQ_HEAD(,cam_eb) xpt_busses;
111 u_int bus_generation;
112
113 struct intr_config_hook *xpt_config_hook;
114
115 int boot_delay;
116 struct callout boot_callout;
117
118 struct mtx xpt_topo_lock;
119 struct mtx xpt_lock;
120 };
121
122 typedef enum {
123 DM_RET_COPY = 0x01,
124 DM_RET_FLAG_MASK = 0x0f,
125 DM_RET_NONE = 0x00,
126 DM_RET_STOP = 0x10,
127 DM_RET_DESCEND = 0x20,
128 DM_RET_ERROR = 0x30,
129 DM_RET_ACTION_MASK = 0xf0
130 } dev_match_ret;
131
132 typedef enum {
133 XPT_DEPTH_BUS,
134 XPT_DEPTH_TARGET,
135 XPT_DEPTH_DEVICE,
136 XPT_DEPTH_PERIPH
137 } xpt_traverse_depth;
138
139 struct xpt_traverse_config {
140 xpt_traverse_depth depth;
141 void *tr_func;
142 void *tr_arg;
143 };
144
145 typedef int xpt_busfunc_t (struct cam_eb *bus, void *arg);
146 typedef int xpt_targetfunc_t (struct cam_et *target, void *arg);
147 typedef int xpt_devicefunc_t (struct cam_ed *device, void *arg);
148 typedef int xpt_periphfunc_t (struct cam_periph *periph, void *arg);
149 typedef int xpt_pdrvfunc_t (struct periph_driver **pdrv, void *arg);
150
151 /* Transport layer configuration information */
152 static struct xpt_softc xsoftc;
153
154 TUNABLE_INT("kern.cam.boot_delay", &xsoftc.boot_delay);
155 SYSCTL_INT(_kern_cam, OID_AUTO, boot_delay, CTLFLAG_RDTUN,
156 &xsoftc.boot_delay, 0, "Bus registration wait time");
157
158 /* Queues for our software interrupt handler */
159 typedef TAILQ_HEAD(cam_isrq, ccb_hdr) cam_isrq_t;
160 typedef TAILQ_HEAD(cam_simq, cam_sim) cam_simq_t;
161 static cam_simq_t cam_simq;
162 static struct mtx cam_simq_lock;
163
164 /* Pointers to software interrupt handlers */
165 static void *cambio_ih;
166
167 struct cam_periph *xpt_periph;
168
169 static periph_init_t xpt_periph_init;
170
171 static struct periph_driver xpt_driver =
172 {
173 xpt_periph_init, "xpt",
174 TAILQ_HEAD_INITIALIZER(xpt_driver.units), /* generation */ 0,
175 CAM_PERIPH_DRV_EARLY
176 };
177
178 PERIPHDRIVER_DECLARE(xpt, xpt_driver);
179
180 static d_open_t xptopen;
181 static d_close_t xptclose;
182 static d_ioctl_t xptioctl;
183 static d_ioctl_t xptdoioctl;
184
185 static struct cdevsw xpt_cdevsw = {
186 .d_version = D_VERSION,
187 .d_flags = 0,
188 .d_open = xptopen,
189 .d_close = xptclose,
190 .d_ioctl = xptioctl,
191 .d_name = "xpt",
192 };
193
194 /* Storage for debugging datastructures */
195 struct cam_path *cam_dpath;
196 u_int32_t cam_dflags = CAM_DEBUG_FLAGS;
197 TUNABLE_INT("kern.cam.dflags", &cam_dflags);
198 SYSCTL_UINT(_kern_cam, OID_AUTO, dflags, CTLFLAG_RW,
199 &cam_dflags, 0, "Enabled debug flags");
200 u_int32_t cam_debug_delay = CAM_DEBUG_DELAY;
201 TUNABLE_INT("kern.cam.debug_delay", &cam_debug_delay);
202 SYSCTL_UINT(_kern_cam, OID_AUTO, debug_delay, CTLFLAG_RW,
203 &cam_debug_delay, 0, "Delay in us after each debug message");
204
205 /* Our boot-time initialization hook */
206 static int cam_module_event_handler(module_t, int /*modeventtype_t*/, void *);
207
208 static moduledata_t cam_moduledata = {
209 "cam",
210 cam_module_event_handler,
211 NULL
212 };
213
214 static int xpt_init(void *);
215
216 DECLARE_MODULE(cam, cam_moduledata, SI_SUB_CONFIGURE, SI_ORDER_SECOND);
217 MODULE_VERSION(cam, 1);
218
219
220 static void xpt_async_bcast(struct async_list *async_head,
221 u_int32_t async_code,
222 struct cam_path *path,
223 void *async_arg);
224 static path_id_t xptnextfreepathid(void);
225 static path_id_t xptpathid(const char *sim_name, int sim_unit, int sim_bus);
226 static union ccb *xpt_get_ccb(struct cam_ed *device);
227 static void xpt_run_dev_allocq(struct cam_ed *device);
228 static void xpt_run_devq(struct cam_devq *devq);
229 static timeout_t xpt_release_devq_timeout;
230 static void xpt_release_simq_timeout(void *arg) __unused;
231 static void xpt_release_bus(struct cam_eb *bus);
232 static void xpt_release_devq_device(struct cam_ed *dev, u_int count,
233 int run_queue);
234 static struct cam_et*
235 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id);
236 static void xpt_release_target(struct cam_et *target);
237 static struct cam_eb*
238 xpt_find_bus(path_id_t path_id);
239 static struct cam_et*
240 xpt_find_target(struct cam_eb *bus, target_id_t target_id);
241 static struct cam_ed*
242 xpt_find_device(struct cam_et *target, lun_id_t lun_id);
243 static void xpt_config(void *arg);
244 static xpt_devicefunc_t xptpassannouncefunc;
245 static void xptaction(struct cam_sim *sim, union ccb *work_ccb);
246 static void xptpoll(struct cam_sim *sim);
247 static void camisr(void *);
248 static void camisr_runqueue(struct cam_sim *);
249 static dev_match_ret xptbusmatch(struct dev_match_pattern *patterns,
250 u_int num_patterns, struct cam_eb *bus);
251 static dev_match_ret xptdevicematch(struct dev_match_pattern *patterns,
252 u_int num_patterns,
253 struct cam_ed *device);
254 static dev_match_ret xptperiphmatch(struct dev_match_pattern *patterns,
255 u_int num_patterns,
256 struct cam_periph *periph);
257 static xpt_busfunc_t xptedtbusfunc;
258 static xpt_targetfunc_t xptedttargetfunc;
259 static xpt_devicefunc_t xptedtdevicefunc;
260 static xpt_periphfunc_t xptedtperiphfunc;
261 static xpt_pdrvfunc_t xptplistpdrvfunc;
262 static xpt_periphfunc_t xptplistperiphfunc;
263 static int xptedtmatch(struct ccb_dev_match *cdm);
264 static int xptperiphlistmatch(struct ccb_dev_match *cdm);
265 static int xptbustraverse(struct cam_eb *start_bus,
266 xpt_busfunc_t *tr_func, void *arg);
267 static int xpttargettraverse(struct cam_eb *bus,
268 struct cam_et *start_target,
269 xpt_targetfunc_t *tr_func, void *arg);
270 static int xptdevicetraverse(struct cam_et *target,
271 struct cam_ed *start_device,
272 xpt_devicefunc_t *tr_func, void *arg);
273 static int xptperiphtraverse(struct cam_ed *device,
274 struct cam_periph *start_periph,
275 xpt_periphfunc_t *tr_func, void *arg);
276 static int xptpdrvtraverse(struct periph_driver **start_pdrv,
277 xpt_pdrvfunc_t *tr_func, void *arg);
278 static int xptpdperiphtraverse(struct periph_driver **pdrv,
279 struct cam_periph *start_periph,
280 xpt_periphfunc_t *tr_func,
281 void *arg);
282 static xpt_busfunc_t xptdefbusfunc;
283 static xpt_targetfunc_t xptdeftargetfunc;
284 static xpt_devicefunc_t xptdefdevicefunc;
285 static xpt_periphfunc_t xptdefperiphfunc;
286 static void xpt_finishconfig_task(void *context, int pending);
287 static void xpt_dev_async_default(u_int32_t async_code,
288 struct cam_eb *bus,
289 struct cam_et *target,
290 struct cam_ed *device,
291 void *async_arg);
292 static struct cam_ed * xpt_alloc_device_default(struct cam_eb *bus,
293 struct cam_et *target,
294 lun_id_t lun_id);
295 static xpt_devicefunc_t xptsetasyncfunc;
296 static xpt_busfunc_t xptsetasyncbusfunc;
297 static cam_status xptregister(struct cam_periph *periph,
298 void *arg);
299 static __inline int periph_is_queued(struct cam_periph *periph);
300 static __inline int device_is_queued(struct cam_ed *device);
301
302 static __inline int
303 xpt_schedule_devq(struct cam_devq *devq, struct cam_ed *dev)
304 {
305 int retval;
306
307 if ((dev->ccbq.queue.entries > 0) &&
308 (dev->ccbq.dev_openings > 0) &&
309 (dev->ccbq.queue.qfrozen_cnt == 0)) {
310 /*
311 * The priority of a device waiting for controller
312 * resources is that of the highest priority CCB
313 * enqueued.
314 */
315 retval =
316 xpt_schedule_dev(&devq->send_queue,
317 &dev->devq_entry.pinfo,
318 CAMQ_GET_PRIO(&dev->ccbq.queue));
319 } else {
320 retval = 0;
321 }
322 return (retval);
323 }
324
325 static __inline int
326 periph_is_queued(struct cam_periph *periph)
327 {
328 return (periph->pinfo.index != CAM_UNQUEUED_INDEX);
329 }
330
331 static __inline int
332 device_is_queued(struct cam_ed *device)
333 {
334 return (device->devq_entry.pinfo.index != CAM_UNQUEUED_INDEX);
335 }
336
337 static void
338 xpt_periph_init()
339 {
340 make_dev(&xpt_cdevsw, 0, UID_ROOT, GID_OPERATOR, 0600, "xpt0");
341 }
342
343 static void
344 xptdone(struct cam_periph *periph, union ccb *done_ccb)
345 {
346 /* Caller will release the CCB */
347 wakeup(&done_ccb->ccb_h.cbfcnp);
348 }
349
350 static int
351 xptopen(struct cdev *dev, int flags, int fmt, struct thread *td)
352 {
353
354 /*
355 * Only allow read-write access.
356 */
357 if (((flags & FWRITE) == 0) || ((flags & FREAD) == 0))
358 return(EPERM);
359
360 /*
361 * We don't allow nonblocking access.
362 */
363 if ((flags & O_NONBLOCK) != 0) {
364 printf("%s: can't do nonblocking access\n", devtoname(dev));
365 return(ENODEV);
366 }
367
368 /* Mark ourselves open */
369 mtx_lock(&xsoftc.xpt_lock);
370 xsoftc.flags |= XPT_FLAG_OPEN;
371 mtx_unlock(&xsoftc.xpt_lock);
372
373 return(0);
374 }
375
376 static int
377 xptclose(struct cdev *dev, int flag, int fmt, struct thread *td)
378 {
379
380 /* Mark ourselves closed */
381 mtx_lock(&xsoftc.xpt_lock);
382 xsoftc.flags &= ~XPT_FLAG_OPEN;
383 mtx_unlock(&xsoftc.xpt_lock);
384
385 return(0);
386 }
387
388 /*
389 * Don't automatically grab the xpt softc lock here even though this is going
390 * through the xpt device. The xpt device is really just a back door for
391 * accessing other devices and SIMs, so the right thing to do is to grab
392 * the appropriate SIM lock once the bus/SIM is located.
393 */
394 static int
395 xptioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
396 {
397 int error;
398
399 if ((error = xptdoioctl(dev, cmd, addr, flag, td)) == ENOTTY) {
400 error = cam_compat_ioctl(dev, &cmd, &addr, &flag, td);
401 if (error == EAGAIN)
402 return (xptdoioctl(dev, cmd, addr, flag, td));
403 }
404 return (error);
405 }
406
407 static int
408 xptdoioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
409 {
410 int error;
411
412 error = 0;
413
414 switch(cmd) {
415 /*
416 * For the transport layer CAMIOCOMMAND ioctl, we really only want
417 * to accept CCB types that don't quite make sense to send through a
418 * passthrough driver. XPT_PATH_INQ is an exception to this, as stated
419 * in the CAM spec.
420 */
421 case CAMIOCOMMAND: {
422 union ccb *ccb;
423 union ccb *inccb;
424 struct cam_eb *bus;
425
426 inccb = (union ccb *)addr;
427
428 bus = xpt_find_bus(inccb->ccb_h.path_id);
429 if (bus == NULL)
430 return (EINVAL);
431
432 switch (inccb->ccb_h.func_code) {
433 case XPT_SCAN_BUS:
434 case XPT_RESET_BUS:
435 if (inccb->ccb_h.target_id != CAM_TARGET_WILDCARD ||
436 inccb->ccb_h.target_lun != CAM_LUN_WILDCARD) {
437 xpt_release_bus(bus);
438 return (EINVAL);
439 }
440 break;
441 case XPT_SCAN_TGT:
442 if (inccb->ccb_h.target_id == CAM_TARGET_WILDCARD ||
443 inccb->ccb_h.target_lun != CAM_LUN_WILDCARD) {
444 xpt_release_bus(bus);
445 return (EINVAL);
446 }
447 break;
448 default:
449 break;
450 }
451
452 switch(inccb->ccb_h.func_code) {
453 case XPT_SCAN_BUS:
454 case XPT_RESET_BUS:
455 case XPT_PATH_INQ:
456 case XPT_ENG_INQ:
457 case XPT_SCAN_LUN:
458 case XPT_SCAN_TGT:
459
460 ccb = xpt_alloc_ccb();
461
462 CAM_SIM_LOCK(bus->sim);
463
464 /*
465 * Create a path using the bus, target, and lun the
466 * user passed in.
467 */
468 if (xpt_create_path(&ccb->ccb_h.path, NULL,
469 inccb->ccb_h.path_id,
470 inccb->ccb_h.target_id,
471 inccb->ccb_h.target_lun) !=
472 CAM_REQ_CMP){
473 error = EINVAL;
474 CAM_SIM_UNLOCK(bus->sim);
475 xpt_free_ccb(ccb);
476 break;
477 }
478 /* Ensure all of our fields are correct */
479 xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path,
480 inccb->ccb_h.pinfo.priority);
481 xpt_merge_ccb(ccb, inccb);
482 ccb->ccb_h.cbfcnp = xptdone;
483 cam_periph_runccb(ccb, NULL, 0, 0, NULL);
484 bcopy(ccb, inccb, sizeof(union ccb));
485 xpt_free_path(ccb->ccb_h.path);
486 xpt_free_ccb(ccb);
487 CAM_SIM_UNLOCK(bus->sim);
488 break;
489
490 case XPT_DEBUG: {
491 union ccb ccb;
492
493 /*
494 * This is an immediate CCB, so it's okay to
495 * allocate it on the stack.
496 */
497
498 CAM_SIM_LOCK(bus->sim);
499
500 /*
501 * Create a path using the bus, target, and lun the
502 * user passed in.
503 */
504 if (xpt_create_path(&ccb.ccb_h.path, NULL,
505 inccb->ccb_h.path_id,
506 inccb->ccb_h.target_id,
507 inccb->ccb_h.target_lun) !=
508 CAM_REQ_CMP){
509 error = EINVAL;
510 CAM_SIM_UNLOCK(bus->sim);
511 break;
512 }
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);
517 ccb.ccb_h.cbfcnp = xptdone;
518 xpt_action(&ccb);
519 bcopy(&ccb, inccb, sizeof(union ccb));
520 xpt_free_path(ccb.ccb_h.path);
521 CAM_SIM_UNLOCK(bus->sim);
522 break;
523
524 }
525 case XPT_DEV_MATCH: {
526 struct cam_periph_map_info mapinfo;
527 struct cam_path *old_path;
528
529 /*
530 * We can't deal with physical addresses for this
531 * type of transaction.
532 */
533 if ((inccb->ccb_h.flags & CAM_DATA_MASK) !=
534 CAM_DATA_VADDR) {
535 error = EINVAL;
536 break;
537 }
538
539 /*
540 * Save this in case the caller had it set to
541 * something in particular.
542 */
543 old_path = inccb->ccb_h.path;
544
545 /*
546 * We really don't need a path for the matching
547 * code. The path is needed because of the
548 * debugging statements in xpt_action(). They
549 * assume that the CCB has a valid path.
550 */
551 inccb->ccb_h.path = xpt_periph->path;
552
553 bzero(&mapinfo, sizeof(mapinfo));
554
555 /*
556 * Map the pattern and match buffers into kernel
557 * virtual address space.
558 */
559 error = cam_periph_mapmem(inccb, &mapinfo);
560
561 if (error) {
562 inccb->ccb_h.path = old_path;
563 break;
564 }
565
566 /*
567 * This is an immediate CCB, we can send it on directly.
568 */
569 CAM_SIM_LOCK(xpt_path_sim(xpt_periph->path));
570 xpt_action(inccb);
571 CAM_SIM_UNLOCK(xpt_path_sim(xpt_periph->path));
572
573 /*
574 * Map the buffers back into user space.
575 */
576 cam_periph_unmapmem(inccb, &mapinfo);
577
578 inccb->ccb_h.path = old_path;
579
580 error = 0;
581 break;
582 }
583 default:
584 error = ENOTSUP;
585 break;
586 }
587 xpt_release_bus(bus);
588 break;
589 }
590 /*
591 * This is the getpassthru ioctl. It takes a XPT_GDEVLIST ccb as input,
592 * with the periphal driver name and unit name filled in. The other
593 * fields don't really matter as input. The passthrough driver name
594 * ("pass"), and unit number are passed back in the ccb. The current
595 * device generation number, and the index into the device peripheral
596 * driver list, and the status are also passed back. Note that
597 * since we do everything in one pass, unlike the XPT_GDEVLIST ccb,
598 * we never return a status of CAM_GDEVLIST_LIST_CHANGED. It is
599 * (or rather should be) impossible for the device peripheral driver
600 * list to change since we look at the whole thing in one pass, and
601 * we do it with lock protection.
602 *
603 */
604 case CAMGETPASSTHRU: {
605 union ccb *ccb;
606 struct cam_periph *periph;
607 struct periph_driver **p_drv;
608 char *name;
609 u_int unit;
610 int base_periph_found;
611
612 ccb = (union ccb *)addr;
613 unit = ccb->cgdl.unit_number;
614 name = ccb->cgdl.periph_name;
615 base_periph_found = 0;
616
617 /*
618 * Sanity check -- make sure we don't get a null peripheral
619 * driver name.
620 */
621 if (*ccb->cgdl.periph_name == '\0') {
622 error = EINVAL;
623 break;
624 }
625
626 /* Keep the list from changing while we traverse it */
627 xpt_lock_buses();
628
629 /* first find our driver in the list of drivers */
630 for (p_drv = periph_drivers; *p_drv != NULL; p_drv++)
631 if (strcmp((*p_drv)->driver_name, name) == 0)
632 break;
633
634 if (*p_drv == NULL) {
635 xpt_unlock_buses();
636 ccb->ccb_h.status = CAM_REQ_CMP_ERR;
637 ccb->cgdl.status = CAM_GDEVLIST_ERROR;
638 *ccb->cgdl.periph_name = '\0';
639 ccb->cgdl.unit_number = 0;
640 error = ENOENT;
641 break;
642 }
643
644 /*
645 * Run through every peripheral instance of this driver
646 * and check to see whether it matches the unit passed
647 * in by the user. If it does, get out of the loops and
648 * find the passthrough driver associated with that
649 * peripheral driver.
650 */
651 for (periph = TAILQ_FIRST(&(*p_drv)->units); periph != NULL;
652 periph = TAILQ_NEXT(periph, unit_links)) {
653
654 if (periph->unit_number == unit)
655 break;
656 }
657 /*
658 * If we found the peripheral driver that the user passed
659 * in, go through all of the peripheral drivers for that
660 * particular device and look for a passthrough driver.
661 */
662 if (periph != NULL) {
663 struct cam_ed *device;
664 int i;
665
666 base_periph_found = 1;
667 device = periph->path->device;
668 for (i = 0, periph = SLIST_FIRST(&device->periphs);
669 periph != NULL;
670 periph = SLIST_NEXT(periph, periph_links), i++) {
671 /*
672 * Check to see whether we have a
673 * passthrough device or not.
674 */
675 if (strcmp(periph->periph_name, "pass") == 0) {
676 /*
677 * Fill in the getdevlist fields.
678 */
679 strcpy(ccb->cgdl.periph_name,
680 periph->periph_name);
681 ccb->cgdl.unit_number =
682 periph->unit_number;
683 if (SLIST_NEXT(periph, periph_links))
684 ccb->cgdl.status =
685 CAM_GDEVLIST_MORE_DEVS;
686 else
687 ccb->cgdl.status =
688 CAM_GDEVLIST_LAST_DEVICE;
689 ccb->cgdl.generation =
690 device->generation;
691 ccb->cgdl.index = i;
692 /*
693 * Fill in some CCB header fields
694 * that the user may want.
695 */
696 ccb->ccb_h.path_id =
697 periph->path->bus->path_id;
698 ccb->ccb_h.target_id =
699 periph->path->target->target_id;
700 ccb->ccb_h.target_lun =
701 periph->path->device->lun_id;
702 ccb->ccb_h.status = CAM_REQ_CMP;
703 break;
704 }
705 }
706 }
707
708 /*
709 * If the periph is null here, one of two things has
710 * happened. The first possibility is that we couldn't
711 * find the unit number of the particular peripheral driver
712 * that the user is asking about. e.g. the user asks for
713 * the passthrough driver for "da11". We find the list of
714 * "da" peripherals all right, but there is no unit 11.
715 * The other possibility is that we went through the list
716 * of peripheral drivers attached to the device structure,
717 * but didn't find one with the name "pass". Either way,
718 * we return ENOENT, since we couldn't find something.
719 */
720 if (periph == NULL) {
721 ccb->ccb_h.status = CAM_REQ_CMP_ERR;
722 ccb->cgdl.status = CAM_GDEVLIST_ERROR;
723 *ccb->cgdl.periph_name = '\0';
724 ccb->cgdl.unit_number = 0;
725 error = ENOENT;
726 /*
727 * It is unfortunate that this is even necessary,
728 * but there are many, many clueless users out there.
729 * If this is true, the user is looking for the
730 * passthrough driver, but doesn't have one in his
731 * kernel.
732 */
733 if (base_periph_found == 1) {
734 printf("xptioctl: pass driver is not in the "
735 "kernel\n");
736 printf("xptioctl: put \"device pass\" in "
737 "your kernel config file\n");
738 }
739 }
740 xpt_unlock_buses();
741 break;
742 }
743 default:
744 error = ENOTTY;
745 break;
746 }
747
748 return(error);
749 }
750
751 static int
752 cam_module_event_handler(module_t mod, int what, void *arg)
753 {
754 int error;
755
756 switch (what) {
757 case MOD_LOAD:
758 if ((error = xpt_init(NULL)) != 0)
759 return (error);
760 break;
761 case MOD_UNLOAD:
762 return EBUSY;
763 default:
764 return EOPNOTSUPP;
765 }
766
767 return 0;
768 }
769
770 static void
771 xpt_rescan_done(struct cam_periph *periph, union ccb *done_ccb)
772 {
773
774 if (done_ccb->ccb_h.ppriv_ptr1 == NULL) {
775 xpt_free_path(done_ccb->ccb_h.path);
776 xpt_free_ccb(done_ccb);
777 } else {
778 done_ccb->ccb_h.cbfcnp = done_ccb->ccb_h.ppriv_ptr1;
779 (*done_ccb->ccb_h.cbfcnp)(periph, done_ccb);
780 }
781 xpt_release_boot();
782 }
783
784 /* thread to handle bus rescans */
785 static void
786 xpt_scanner_thread(void *dummy)
787 {
788 union ccb *ccb;
789 struct cam_sim *sim;
790
791 xpt_lock_buses();
792 for (;;) {
793 if (TAILQ_EMPTY(&xsoftc.ccb_scanq))
794 msleep(&xsoftc.ccb_scanq, &xsoftc.xpt_topo_lock, PRIBIO,
795 "-", 0);
796 if ((ccb = (union ccb *)TAILQ_FIRST(&xsoftc.ccb_scanq)) != NULL) {
797 TAILQ_REMOVE(&xsoftc.ccb_scanq, &ccb->ccb_h, sim_links.tqe);
798 xpt_unlock_buses();
799
800 sim = ccb->ccb_h.path->bus->sim;
801 CAM_SIM_LOCK(sim);
802 xpt_action(ccb);
803 CAM_SIM_UNLOCK(sim);
804
805 xpt_lock_buses();
806 }
807 }
808 }
809
810 void
811 xpt_rescan(union ccb *ccb)
812 {
813 struct ccb_hdr *hdr;
814
815 /* Prepare request */
816 if (ccb->ccb_h.path->target->target_id == CAM_TARGET_WILDCARD &&
817 ccb->ccb_h.path->device->lun_id == CAM_LUN_WILDCARD)
818 ccb->ccb_h.func_code = XPT_SCAN_BUS;
819 else if (ccb->ccb_h.path->target->target_id != CAM_TARGET_WILDCARD &&
820 ccb->ccb_h.path->device->lun_id == CAM_LUN_WILDCARD)
821 ccb->ccb_h.func_code = XPT_SCAN_TGT;
822 else if (ccb->ccb_h.path->target->target_id != CAM_TARGET_WILDCARD &&
823 ccb->ccb_h.path->device->lun_id != CAM_LUN_WILDCARD)
824 ccb->ccb_h.func_code = XPT_SCAN_LUN;
825 else {
826 xpt_print(ccb->ccb_h.path, "illegal scan path\n");
827 xpt_free_path(ccb->ccb_h.path);
828 xpt_free_ccb(ccb);
829 return;
830 }
831 ccb->ccb_h.ppriv_ptr1 = ccb->ccb_h.cbfcnp;
832 ccb->ccb_h.cbfcnp = xpt_rescan_done;
833 xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path, CAM_PRIORITY_XPT);
834 /* Don't make duplicate entries for the same paths. */
835 xpt_lock_buses();
836 if (ccb->ccb_h.ppriv_ptr1 == NULL) {
837 TAILQ_FOREACH(hdr, &xsoftc.ccb_scanq, sim_links.tqe) {
838 if (xpt_path_comp(hdr->path, ccb->ccb_h.path) == 0) {
839 wakeup(&xsoftc.ccb_scanq);
840 xpt_unlock_buses();
841 xpt_print(ccb->ccb_h.path, "rescan already queued\n");
842 xpt_free_path(ccb->ccb_h.path);
843 xpt_free_ccb(ccb);
844 return;
845 }
846 }
847 }
848 TAILQ_INSERT_TAIL(&xsoftc.ccb_scanq, &ccb->ccb_h, sim_links.tqe);
849 xsoftc.buses_to_config++;
850 wakeup(&xsoftc.ccb_scanq);
851 xpt_unlock_buses();
852 }
853
854 /* Functions accessed by the peripheral drivers */
855 static int
856 xpt_init(void *dummy)
857 {
858 struct cam_sim *xpt_sim;
859 struct cam_path *path;
860 struct cam_devq *devq;
861 cam_status status;
862
863 TAILQ_INIT(&xsoftc.xpt_busses);
864 TAILQ_INIT(&cam_simq);
865 TAILQ_INIT(&xsoftc.ccb_scanq);
866 STAILQ_INIT(&xsoftc.highpowerq);
867 xsoftc.num_highpower = CAM_MAX_HIGHPOWER;
868
869 mtx_init(&cam_simq_lock, "CAM SIMQ lock", NULL, MTX_DEF);
870 mtx_init(&xsoftc.xpt_lock, "XPT lock", NULL, MTX_DEF);
871 mtx_init(&xsoftc.xpt_topo_lock, "XPT topology lock", NULL, MTX_DEF);
872
873 #ifdef CAM_BOOT_DELAY
874 /*
875 * Override this value at compile time to assist our users
876 * who don't use loader to boot a kernel.
877 */
878 xsoftc.boot_delay = CAM_BOOT_DELAY;
879 #endif
880 /*
881 * The xpt layer is, itself, the equivelent of a SIM.
882 * Allow 16 ccbs in the ccb pool for it. This should
883 * give decent parallelism when we probe busses and
884 * perform other XPT functions.
885 */
886 devq = cam_simq_alloc(16);
887 xpt_sim = cam_sim_alloc(xptaction,
888 xptpoll,
889 "xpt",
890 /*softc*/NULL,
891 /*unit*/0,
892 /*mtx*/&xsoftc.xpt_lock,
893 /*max_dev_transactions*/0,
894 /*max_tagged_dev_transactions*/0,
895 devq);
896 if (xpt_sim == NULL)
897 return (ENOMEM);
898
899 mtx_lock(&xsoftc.xpt_lock);
900 if ((status = xpt_bus_register(xpt_sim, NULL, 0)) != CAM_SUCCESS) {
901 mtx_unlock(&xsoftc.xpt_lock);
902 printf("xpt_init: xpt_bus_register failed with status %#x,"
903 " failing attach\n", status);
904 return (EINVAL);
905 }
906
907 /*
908 * Looking at the XPT from the SIM layer, the XPT is
909 * the equivelent of a peripheral driver. Allocate
910 * a peripheral driver entry for us.
911 */
912 if ((status = xpt_create_path(&path, NULL, CAM_XPT_PATH_ID,
913 CAM_TARGET_WILDCARD,
914 CAM_LUN_WILDCARD)) != CAM_REQ_CMP) {
915 mtx_unlock(&xsoftc.xpt_lock);
916 printf("xpt_init: xpt_create_path failed with status %#x,"
917 " failing attach\n", status);
918 return (EINVAL);
919 }
920
921 cam_periph_alloc(xptregister, NULL, NULL, NULL, "xpt", CAM_PERIPH_BIO,
922 path, NULL, 0, xpt_sim);
923 xpt_free_path(path);
924 mtx_unlock(&xsoftc.xpt_lock);
925 /* Install our software interrupt handlers */
926 swi_add(NULL, "cambio", camisr, NULL, SWI_CAMBIO, INTR_MPSAFE, &cambio_ih);
927 /*
928 * Register a callback for when interrupts are enabled.
929 */
930 xsoftc.xpt_config_hook =
931 (struct intr_config_hook *)malloc(sizeof(struct intr_config_hook),
932 M_CAMXPT, M_NOWAIT | M_ZERO);
933 if (xsoftc.xpt_config_hook == NULL) {
934 printf("xpt_init: Cannot malloc config hook "
935 "- failing attach\n");
936 return (ENOMEM);
937 }
938 xsoftc.xpt_config_hook->ich_func = xpt_config;
939 if (config_intrhook_establish(xsoftc.xpt_config_hook) != 0) {
940 free (xsoftc.xpt_config_hook, M_CAMXPT);
941 printf("xpt_init: config_intrhook_establish failed "
942 "- failing attach\n");
943 }
944
945 return (0);
946 }
947
948 static cam_status
949 xptregister(struct cam_periph *periph, void *arg)
950 {
951 struct cam_sim *xpt_sim;
952
953 if (periph == NULL) {
954 printf("xptregister: periph was NULL!!\n");
955 return(CAM_REQ_CMP_ERR);
956 }
957
958 xpt_sim = (struct cam_sim *)arg;
959 xpt_sim->softc = periph;
960 xpt_periph = periph;
961 periph->softc = NULL;
962
963 return(CAM_REQ_CMP);
964 }
965
966 int32_t
967 xpt_add_periph(struct cam_periph *periph)
968 {
969 struct cam_ed *device;
970 int32_t status;
971 struct periph_list *periph_head;
972
973 mtx_assert(periph->sim->mtx, MA_OWNED);
974
975 device = periph->path->device;
976
977 periph_head = &device->periphs;
978
979 status = CAM_REQ_CMP;
980
981 if (device != NULL) {
982 /*
983 * Make room for this peripheral
984 * so it will fit in the queue
985 * when it's scheduled to run
986 */
987 status = camq_resize(&device->drvq,
988 device->drvq.array_size + 1);
989
990 device->generation++;
991
992 SLIST_INSERT_HEAD(periph_head, periph, periph_links);
993 }
994
995 return (status);
996 }
997
998 void
999 xpt_remove_periph(struct cam_periph *periph)
1000 {
1001 struct cam_ed *device;
1002
1003 mtx_assert(periph->sim->mtx, MA_OWNED);
1004
1005 device = periph->path->device;
1006
1007 if (device != NULL) {
1008 struct periph_list *periph_head;
1009
1010 periph_head = &device->periphs;
1011
1012 /* Release the slot for this peripheral */
1013 camq_resize(&device->drvq, device->drvq.array_size - 1);
1014
1015 device->generation++;
1016
1017 SLIST_REMOVE(periph_head, periph, cam_periph, periph_links);
1018 }
1019 }
1020
1021
1022 void
1023 xpt_announce_periph(struct cam_periph *periph, char *announce_string)
1024 {
1025 struct cam_path *path = periph->path;
1026
1027 mtx_assert(periph->sim->mtx, MA_OWNED);
1028 periph->flags |= CAM_PERIPH_ANNOUNCED;
1029
1030 printf("%s%d at %s%d bus %d scbus%d target %d lun %d\n",
1031 periph->periph_name, periph->unit_number,
1032 path->bus->sim->sim_name,
1033 path->bus->sim->unit_number,
1034 path->bus->sim->bus_id,
1035 path->bus->path_id,
1036 path->target->target_id,
1037 path->device->lun_id);
1038 printf("%s%d: ", periph->periph_name, periph->unit_number);
1039 if (path->device->protocol == PROTO_SCSI)
1040 scsi_print_inquiry(&path->device->inq_data);
1041 else if (path->device->protocol == PROTO_ATA ||
1042 path->device->protocol == PROTO_SATAPM)
1043 ata_print_ident(&path->device->ident_data);
1044 else if (path->device->protocol == PROTO_SEMB)
1045 semb_print_ident(
1046 (struct sep_identify_data *)&path->device->ident_data);
1047 else
1048 printf("Unknown protocol device\n");
1049 if (path->device->serial_num_len > 0) {
1050 /* Don't wrap the screen - print only the first 60 chars */
1051 printf("%s%d: Serial Number %.60s\n", periph->periph_name,
1052 periph->unit_number, path->device->serial_num);
1053 }
1054 /* Announce transport details. */
1055 (*(path->bus->xport->announce))(periph);
1056 /* Announce command queueing. */
1057 if (path->device->inq_flags & SID_CmdQue
1058 || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) {
1059 printf("%s%d: Command Queueing enabled\n",
1060 periph->periph_name, periph->unit_number);
1061 }
1062 /* Announce caller's details if they've passed in. */
1063 if (announce_string != NULL)
1064 printf("%s%d: %s\n", periph->periph_name,
1065 periph->unit_number, announce_string);
1066 }
1067
1068 void
1069 xpt_announce_quirks(struct cam_periph *periph, int quirks, char *bit_string)
1070 {
1071 if (quirks != 0) {
1072 printf("%s%d: quirks=0x%b\n", periph->periph_name,
1073 periph->unit_number, quirks, bit_string);
1074 }
1075 }
1076
1077 void
1078 xpt_denounce_periph(struct cam_periph *periph)
1079 {
1080 struct cam_path *path = periph->path;
1081
1082 mtx_assert(periph->sim->mtx, MA_OWNED);
1083 printf("%s%d at %s%d bus %d scbus%d target %d lun %d\n",
1084 periph->periph_name, periph->unit_number,
1085 path->bus->sim->sim_name,
1086 path->bus->sim->unit_number,
1087 path->bus->sim->bus_id,
1088 path->bus->path_id,
1089 path->target->target_id,
1090 path->device->lun_id);
1091 printf("%s%d: ", periph->periph_name, periph->unit_number);
1092 if (path->device->protocol == PROTO_SCSI)
1093 scsi_print_inquiry_short(&path->device->inq_data);
1094 else if (path->device->protocol == PROTO_ATA ||
1095 path->device->protocol == PROTO_SATAPM)
1096 ata_print_ident_short(&path->device->ident_data);
1097 else if (path->device->protocol == PROTO_SEMB)
1098 semb_print_ident_short(
1099 (struct sep_identify_data *)&path->device->ident_data);
1100 else
1101 printf("Unknown protocol device");
1102 if (path->device->serial_num_len > 0)
1103 printf(" s/n %.60s", path->device->serial_num);
1104 printf(" detached\n");
1105 }
1106
1107
1108 int
1109 xpt_getattr(char *buf, size_t len, const char *attr, struct cam_path *path)
1110 {
1111 int ret = -1, l;
1112 struct ccb_dev_advinfo cdai;
1113 struct scsi_vpd_id_descriptor *idd;
1114
1115 mtx_assert(path->bus->sim->mtx, MA_OWNED);
1116
1117 memset(&cdai, 0, sizeof(cdai));
1118 xpt_setup_ccb(&cdai.ccb_h, path, CAM_PRIORITY_NORMAL);
1119 cdai.ccb_h.func_code = XPT_DEV_ADVINFO;
1120 cdai.bufsiz = len;
1121
1122 if (!strcmp(attr, "GEOM::ident"))
1123 cdai.buftype = CDAI_TYPE_SERIAL_NUM;
1124 else if (!strcmp(attr, "GEOM::physpath"))
1125 cdai.buftype = CDAI_TYPE_PHYS_PATH;
1126 else if (strcmp(attr, "GEOM::lunid") == 0 ||
1127 strcmp(attr, "GEOM::lunname") == 0) {
1128 cdai.buftype = CDAI_TYPE_SCSI_DEVID;
1129 cdai.bufsiz = CAM_SCSI_DEVID_MAXLEN;
1130 } else
1131 goto out;
1132
1133 cdai.buf = malloc(cdai.bufsiz, M_CAMXPT, M_NOWAIT|M_ZERO);
1134 if (cdai.buf == NULL) {
1135 ret = ENOMEM;
1136 goto out;
1137 }
1138 xpt_action((union ccb *)&cdai); /* can only be synchronous */
1139 if ((cdai.ccb_h.status & CAM_DEV_QFRZN) != 0)
1140 cam_release_devq(cdai.ccb_h.path, 0, 0, 0, FALSE);
1141 if (cdai.provsiz == 0)
1142 goto out;
1143 if (cdai.buftype == CDAI_TYPE_SCSI_DEVID) {
1144 if (strcmp(attr, "GEOM::lunid") == 0) {
1145 idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf,
1146 cdai.provsiz, scsi_devid_is_lun_naa);
1147 if (idd == NULL)
1148 idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf,
1149 cdai.provsiz, scsi_devid_is_lun_eui64);
1150 } else
1151 idd = NULL;
1152 if (idd == NULL)
1153 idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf,
1154 cdai.provsiz, scsi_devid_is_lun_t10);
1155 if (idd == NULL)
1156 idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf,
1157 cdai.provsiz, scsi_devid_is_lun_name);
1158 if (idd == NULL)
1159 goto out;
1160 ret = 0;
1161 if ((idd->proto_codeset & SVPD_ID_CODESET_MASK) == SVPD_ID_CODESET_ASCII) {
1162 if (idd->length < len) {
1163 for (l = 0; l < idd->length; l++)
1164 buf[l] = idd->identifier[l] ?
1165 idd->identifier[l] : ' ';
1166 buf[l] = 0;
1167 } else
1168 ret = EFAULT;
1169 } else if ((idd->proto_codeset & SVPD_ID_CODESET_MASK) == SVPD_ID_CODESET_UTF8) {
1170 l = strnlen(idd->identifier, idd->length);
1171 if (l < len) {
1172 bcopy(idd->identifier, buf, l);
1173 buf[l] = 0;
1174 } else
1175 ret = EFAULT;
1176 } else {
1177 if (idd->length * 2 < len) {
1178 for (l = 0; l < idd->length; l++)
1179 sprintf(buf + l * 2, "%02x",
1180 idd->identifier[l]);
1181 } else
1182 ret = EFAULT;
1183 }
1184 } else {
1185 ret = 0;
1186 if (strlcpy(buf, cdai.buf, len) >= len)
1187 ret = EFAULT;
1188 }
1189
1190 out:
1191 if (cdai.buf != NULL)
1192 free(cdai.buf, M_CAMXPT);
1193 return ret;
1194 }
1195
1196 static dev_match_ret
1197 xptbusmatch(struct dev_match_pattern *patterns, u_int num_patterns,
1198 struct cam_eb *bus)
1199 {
1200 dev_match_ret retval;
1201 int i;
1202
1203 retval = DM_RET_NONE;
1204
1205 /*
1206 * If we aren't given something to match against, that's an error.
1207 */
1208 if (bus == NULL)
1209 return(DM_RET_ERROR);
1210
1211 /*
1212 * If there are no match entries, then this bus matches no
1213 * matter what.
1214 */
1215 if ((patterns == NULL) || (num_patterns == 0))
1216 return(DM_RET_DESCEND | DM_RET_COPY);
1217
1218 for (i = 0; i < num_patterns; i++) {
1219 struct bus_match_pattern *cur_pattern;
1220
1221 /*
1222 * If the pattern in question isn't for a bus node, we
1223 * aren't interested. However, we do indicate to the
1224 * calling routine that we should continue descending the
1225 * tree, since the user wants to match against lower-level
1226 * EDT elements.
1227 */
1228 if (patterns[i].type != DEV_MATCH_BUS) {
1229 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1230 retval |= DM_RET_DESCEND;
1231 continue;
1232 }
1233
1234 cur_pattern = &patterns[i].pattern.bus_pattern;
1235
1236 /*
1237 * If they want to match any bus node, we give them any
1238 * device node.
1239 */
1240 if (cur_pattern->flags == BUS_MATCH_ANY) {
1241 /* set the copy flag */
1242 retval |= DM_RET_COPY;
1243
1244 /*
1245 * If we've already decided on an action, go ahead
1246 * and return.
1247 */
1248 if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE)
1249 return(retval);
1250 }
1251
1252 /*
1253 * Not sure why someone would do this...
1254 */
1255 if (cur_pattern->flags == BUS_MATCH_NONE)
1256 continue;
1257
1258 if (((cur_pattern->flags & BUS_MATCH_PATH) != 0)
1259 && (cur_pattern->path_id != bus->path_id))
1260 continue;
1261
1262 if (((cur_pattern->flags & BUS_MATCH_BUS_ID) != 0)
1263 && (cur_pattern->bus_id != bus->sim->bus_id))
1264 continue;
1265
1266 if (((cur_pattern->flags & BUS_MATCH_UNIT) != 0)
1267 && (cur_pattern->unit_number != bus->sim->unit_number))
1268 continue;
1269
1270 if (((cur_pattern->flags & BUS_MATCH_NAME) != 0)
1271 && (strncmp(cur_pattern->dev_name, bus->sim->sim_name,
1272 DEV_IDLEN) != 0))
1273 continue;
1274
1275 /*
1276 * If we get to this point, the user definitely wants
1277 * information on this bus. So tell the caller to copy the
1278 * data out.
1279 */
1280 retval |= DM_RET_COPY;
1281
1282 /*
1283 * If the return action has been set to descend, then we
1284 * know that we've already seen a non-bus matching
1285 * expression, therefore we need to further descend the tree.
1286 * This won't change by continuing around the loop, so we
1287 * go ahead and return. If we haven't seen a non-bus
1288 * matching expression, we keep going around the loop until
1289 * we exhaust the matching expressions. We'll set the stop
1290 * flag once we fall out of the loop.
1291 */
1292 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND)
1293 return(retval);
1294 }
1295
1296 /*
1297 * If the return action hasn't been set to descend yet, that means
1298 * we haven't seen anything other than bus matching patterns. So
1299 * tell the caller to stop descending the tree -- the user doesn't
1300 * want to match against lower level tree elements.
1301 */
1302 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1303 retval |= DM_RET_STOP;
1304
1305 return(retval);
1306 }
1307
1308 static dev_match_ret
1309 xptdevicematch(struct dev_match_pattern *patterns, u_int num_patterns,
1310 struct cam_ed *device)
1311 {
1312 dev_match_ret retval;
1313 int i;
1314
1315 retval = DM_RET_NONE;
1316
1317 /*
1318 * If we aren't given something to match against, that's an error.
1319 */
1320 if (device == NULL)
1321 return(DM_RET_ERROR);
1322
1323 /*
1324 * If there are no match entries, then this device matches no
1325 * matter what.
1326 */
1327 if ((patterns == NULL) || (num_patterns == 0))
1328 return(DM_RET_DESCEND | DM_RET_COPY);
1329
1330 for (i = 0; i < num_patterns; i++) {
1331 struct device_match_pattern *cur_pattern;
1332 struct scsi_vpd_device_id *device_id_page;
1333
1334 /*
1335 * If the pattern in question isn't for a device node, we
1336 * aren't interested.
1337 */
1338 if (patterns[i].type != DEV_MATCH_DEVICE) {
1339 if ((patterns[i].type == DEV_MATCH_PERIPH)
1340 && ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE))
1341 retval |= DM_RET_DESCEND;
1342 continue;
1343 }
1344
1345 cur_pattern = &patterns[i].pattern.device_pattern;
1346
1347 /* Error out if mutually exclusive options are specified. */
1348 if ((cur_pattern->flags & (DEV_MATCH_INQUIRY|DEV_MATCH_DEVID))
1349 == (DEV_MATCH_INQUIRY|DEV_MATCH_DEVID))
1350 return(DM_RET_ERROR);
1351
1352 /*
1353 * If they want to match any device node, we give them any
1354 * device node.
1355 */
1356 if (cur_pattern->flags == DEV_MATCH_ANY)
1357 goto copy_dev_node;
1358
1359 /*
1360 * Not sure why someone would do this...
1361 */
1362 if (cur_pattern->flags == DEV_MATCH_NONE)
1363 continue;
1364
1365 if (((cur_pattern->flags & DEV_MATCH_PATH) != 0)
1366 && (cur_pattern->path_id != device->target->bus->path_id))
1367 continue;
1368
1369 if (((cur_pattern->flags & DEV_MATCH_TARGET) != 0)
1370 && (cur_pattern->target_id != device->target->target_id))
1371 continue;
1372
1373 if (((cur_pattern->flags & DEV_MATCH_LUN) != 0)
1374 && (cur_pattern->target_lun != device->lun_id))
1375 continue;
1376
1377 if (((cur_pattern->flags & DEV_MATCH_INQUIRY) != 0)
1378 && (cam_quirkmatch((caddr_t)&device->inq_data,
1379 (caddr_t)&cur_pattern->data.inq_pat,
1380 1, sizeof(cur_pattern->data.inq_pat),
1381 scsi_static_inquiry_match) == NULL))
1382 continue;
1383
1384 device_id_page = (struct scsi_vpd_device_id *)device->device_id;
1385 if (((cur_pattern->flags & DEV_MATCH_DEVID) != 0)
1386 && (device->device_id_len < SVPD_DEVICE_ID_HDR_LEN
1387 || scsi_devid_match((uint8_t *)device_id_page->desc_list,
1388 device->device_id_len
1389 - SVPD_DEVICE_ID_HDR_LEN,
1390 cur_pattern->data.devid_pat.id,
1391 cur_pattern->data.devid_pat.id_len) != 0))
1392 continue;
1393
1394 copy_dev_node:
1395 /*
1396 * If we get to this point, the user definitely wants
1397 * information on this device. So tell the caller to copy
1398 * the data out.
1399 */
1400 retval |= DM_RET_COPY;
1401
1402 /*
1403 * If the return action has been set to descend, then we
1404 * know that we've already seen a peripheral matching
1405 * expression, therefore we need to further descend the tree.
1406 * This won't change by continuing around the loop, so we
1407 * go ahead and return. If we haven't seen a peripheral
1408 * matching expression, we keep going around the loop until
1409 * we exhaust the matching expressions. We'll set the stop
1410 * flag once we fall out of the loop.
1411 */
1412 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND)
1413 return(retval);
1414 }
1415
1416 /*
1417 * If the return action hasn't been set to descend yet, that means
1418 * we haven't seen any peripheral matching patterns. So tell the
1419 * caller to stop descending the tree -- the user doesn't want to
1420 * match against lower level tree elements.
1421 */
1422 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1423 retval |= DM_RET_STOP;
1424
1425 return(retval);
1426 }
1427
1428 /*
1429 * Match a single peripheral against any number of match patterns.
1430 */
1431 static dev_match_ret
1432 xptperiphmatch(struct dev_match_pattern *patterns, u_int num_patterns,
1433 struct cam_periph *periph)
1434 {
1435 dev_match_ret retval;
1436 int i;
1437
1438 /*
1439 * If we aren't given something to match against, that's an error.
1440 */
1441 if (periph == NULL)
1442 return(DM_RET_ERROR);
1443
1444 /*
1445 * If there are no match entries, then this peripheral matches no
1446 * matter what.
1447 */
1448 if ((patterns == NULL) || (num_patterns == 0))
1449 return(DM_RET_STOP | DM_RET_COPY);
1450
1451 /*
1452 * There aren't any nodes below a peripheral node, so there's no
1453 * reason to descend the tree any further.
1454 */
1455 retval = DM_RET_STOP;
1456
1457 for (i = 0; i < num_patterns; i++) {
1458 struct periph_match_pattern *cur_pattern;
1459
1460 /*
1461 * If the pattern in question isn't for a peripheral, we
1462 * aren't interested.
1463 */
1464 if (patterns[i].type != DEV_MATCH_PERIPH)
1465 continue;
1466
1467 cur_pattern = &patterns[i].pattern.periph_pattern;
1468
1469 /*
1470 * If they want to match on anything, then we will do so.
1471 */
1472 if (cur_pattern->flags == PERIPH_MATCH_ANY) {
1473 /* set the copy flag */
1474 retval |= DM_RET_COPY;
1475
1476 /*
1477 * We've already set the return action to stop,
1478 * since there are no nodes below peripherals in
1479 * the tree.
1480 */
1481 return(retval);
1482 }
1483
1484 /*
1485 * Not sure why someone would do this...
1486 */
1487 if (cur_pattern->flags == PERIPH_MATCH_NONE)
1488 continue;
1489
1490 if (((cur_pattern->flags & PERIPH_MATCH_PATH) != 0)
1491 && (cur_pattern->path_id != periph->path->bus->path_id))
1492 continue;
1493
1494 /*
1495 * For the target and lun id's, we have to make sure the
1496 * target and lun pointers aren't NULL. The xpt peripheral
1497 * has a wildcard target and device.
1498 */
1499 if (((cur_pattern->flags & PERIPH_MATCH_TARGET) != 0)
1500 && ((periph->path->target == NULL)
1501 ||(cur_pattern->target_id != periph->path->target->target_id)))
1502 continue;
1503
1504 if (((cur_pattern->flags & PERIPH_MATCH_LUN) != 0)
1505 && ((periph->path->device == NULL)
1506 || (cur_pattern->target_lun != periph->path->device->lun_id)))
1507 continue;
1508
1509 if (((cur_pattern->flags & PERIPH_MATCH_UNIT) != 0)
1510 && (cur_pattern->unit_number != periph->unit_number))
1511 continue;
1512
1513 if (((cur_pattern->flags & PERIPH_MATCH_NAME) != 0)
1514 && (strncmp(cur_pattern->periph_name, periph->periph_name,
1515 DEV_IDLEN) != 0))
1516 continue;
1517
1518 /*
1519 * If we get to this point, the user definitely wants
1520 * information on this peripheral. So tell the caller to
1521 * copy the data out.
1522 */
1523 retval |= DM_RET_COPY;
1524
1525 /*
1526 * The return action has already been set to stop, since
1527 * peripherals don't have any nodes below them in the EDT.
1528 */
1529 return(retval);
1530 }
1531
1532 /*
1533 * If we get to this point, the peripheral that was passed in
1534 * doesn't match any of the patterns.
1535 */
1536 return(retval);
1537 }
1538
1539 static int
1540 xptedtbusfunc(struct cam_eb *bus, void *arg)
1541 {
1542 struct ccb_dev_match *cdm;
1543 dev_match_ret retval;
1544
1545 cdm = (struct ccb_dev_match *)arg;
1546
1547 /*
1548 * If our position is for something deeper in the tree, that means
1549 * that we've already seen this node. So, we keep going down.
1550 */
1551 if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1552 && (cdm->pos.cookie.bus == bus)
1553 && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1554 && (cdm->pos.cookie.target != NULL))
1555 retval = DM_RET_DESCEND;
1556 else
1557 retval = xptbusmatch(cdm->patterns, cdm->num_patterns, bus);
1558
1559 /*
1560 * If we got an error, bail out of the search.
1561 */
1562 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1563 cdm->status = CAM_DEV_MATCH_ERROR;
1564 return(0);
1565 }
1566
1567 /*
1568 * If the copy flag is set, copy this bus out.
1569 */
1570 if (retval & DM_RET_COPY) {
1571 int spaceleft, j;
1572
1573 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1574 sizeof(struct dev_match_result));
1575
1576 /*
1577 * If we don't have enough space to put in another
1578 * match result, save our position and tell the
1579 * user there are more devices to check.
1580 */
1581 if (spaceleft < sizeof(struct dev_match_result)) {
1582 bzero(&cdm->pos, sizeof(cdm->pos));
1583 cdm->pos.position_type =
1584 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS;
1585
1586 cdm->pos.cookie.bus = bus;
1587 cdm->pos.generations[CAM_BUS_GENERATION]=
1588 xsoftc.bus_generation;
1589 cdm->status = CAM_DEV_MATCH_MORE;
1590 return(0);
1591 }
1592 j = cdm->num_matches;
1593 cdm->num_matches++;
1594 cdm->matches[j].type = DEV_MATCH_BUS;
1595 cdm->matches[j].result.bus_result.path_id = bus->path_id;
1596 cdm->matches[j].result.bus_result.bus_id = bus->sim->bus_id;
1597 cdm->matches[j].result.bus_result.unit_number =
1598 bus->sim->unit_number;
1599 strncpy(cdm->matches[j].result.bus_result.dev_name,
1600 bus->sim->sim_name, DEV_IDLEN);
1601 }
1602
1603 /*
1604 * If the user is only interested in busses, there's no
1605 * reason to descend to the next level in the tree.
1606 */
1607 if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP)
1608 return(1);
1609
1610 /*
1611 * If there is a target generation recorded, check it to
1612 * make sure the target list hasn't changed.
1613 */
1614 if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1615 && (bus == cdm->pos.cookie.bus)
1616 && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1617 && (cdm->pos.generations[CAM_TARGET_GENERATION] != 0)
1618 && (cdm->pos.generations[CAM_TARGET_GENERATION] !=
1619 bus->generation)) {
1620 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1621 return(0);
1622 }
1623
1624 if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1625 && (cdm->pos.cookie.bus == bus)
1626 && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1627 && (cdm->pos.cookie.target != NULL))
1628 return(xpttargettraverse(bus,
1629 (struct cam_et *)cdm->pos.cookie.target,
1630 xptedttargetfunc, arg));
1631 else
1632 return(xpttargettraverse(bus, NULL, xptedttargetfunc, arg));
1633 }
1634
1635 static int
1636 xptedttargetfunc(struct cam_et *target, void *arg)
1637 {
1638 struct ccb_dev_match *cdm;
1639
1640 cdm = (struct ccb_dev_match *)arg;
1641
1642 /*
1643 * If there is a device list generation recorded, check it to
1644 * make sure the device list hasn't changed.
1645 */
1646 if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1647 && (cdm->pos.cookie.bus == target->bus)
1648 && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1649 && (cdm->pos.cookie.target == target)
1650 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1651 && (cdm->pos.generations[CAM_DEV_GENERATION] != 0)
1652 && (cdm->pos.generations[CAM_DEV_GENERATION] !=
1653 target->generation)) {
1654 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1655 return(0);
1656 }
1657
1658 if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1659 && (cdm->pos.cookie.bus == target->bus)
1660 && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1661 && (cdm->pos.cookie.target == target)
1662 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1663 && (cdm->pos.cookie.device != NULL))
1664 return(xptdevicetraverse(target,
1665 (struct cam_ed *)cdm->pos.cookie.device,
1666 xptedtdevicefunc, arg));
1667 else
1668 return(xptdevicetraverse(target, NULL, xptedtdevicefunc, arg));
1669 }
1670
1671 static int
1672 xptedtdevicefunc(struct cam_ed *device, void *arg)
1673 {
1674
1675 struct ccb_dev_match *cdm;
1676 dev_match_ret retval;
1677
1678 cdm = (struct ccb_dev_match *)arg;
1679
1680 /*
1681 * If our position is for something deeper in the tree, that means
1682 * that we've already seen this node. So, we keep going down.
1683 */
1684 if ((cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1685 && (cdm->pos.cookie.device == device)
1686 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
1687 && (cdm->pos.cookie.periph != NULL))
1688 retval = DM_RET_DESCEND;
1689 else
1690 retval = xptdevicematch(cdm->patterns, cdm->num_patterns,
1691 device);
1692
1693 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1694 cdm->status = CAM_DEV_MATCH_ERROR;
1695 return(0);
1696 }
1697
1698 /*
1699 * If the copy flag is set, copy this device out.
1700 */
1701 if (retval & DM_RET_COPY) {
1702 int spaceleft, j;
1703
1704 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1705 sizeof(struct dev_match_result));
1706
1707 /*
1708 * If we don't have enough space to put in another
1709 * match result, save our position and tell the
1710 * user there are more devices to check.
1711 */
1712 if (spaceleft < sizeof(struct dev_match_result)) {
1713 bzero(&cdm->pos, sizeof(cdm->pos));
1714 cdm->pos.position_type =
1715 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS |
1716 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE;
1717
1718 cdm->pos.cookie.bus = device->target->bus;
1719 cdm->pos.generations[CAM_BUS_GENERATION]=
1720 xsoftc.bus_generation;
1721 cdm->pos.cookie.target = device->target;
1722 cdm->pos.generations[CAM_TARGET_GENERATION] =
1723 device->target->bus->generation;
1724 cdm->pos.cookie.device = device;
1725 cdm->pos.generations[CAM_DEV_GENERATION] =
1726 device->target->generation;
1727 cdm->status = CAM_DEV_MATCH_MORE;
1728 return(0);
1729 }
1730 j = cdm->num_matches;
1731 cdm->num_matches++;
1732 cdm->matches[j].type = DEV_MATCH_DEVICE;
1733 cdm->matches[j].result.device_result.path_id =
1734 device->target->bus->path_id;
1735 cdm->matches[j].result.device_result.target_id =
1736 device->target->target_id;
1737 cdm->matches[j].result.device_result.target_lun =
1738 device->lun_id;
1739 cdm->matches[j].result.device_result.protocol =
1740 device->protocol;
1741 bcopy(&device->inq_data,
1742 &cdm->matches[j].result.device_result.inq_data,
1743 sizeof(struct scsi_inquiry_data));
1744 bcopy(&device->ident_data,
1745 &cdm->matches[j].result.device_result.ident_data,
1746 sizeof(struct ata_params));
1747
1748 /* Let the user know whether this device is unconfigured */
1749 if (device->flags & CAM_DEV_UNCONFIGURED)
1750 cdm->matches[j].result.device_result.flags =
1751 DEV_RESULT_UNCONFIGURED;
1752 else
1753 cdm->matches[j].result.device_result.flags =
1754 DEV_RESULT_NOFLAG;
1755 }
1756
1757 /*
1758 * If the user isn't interested in peripherals, don't descend
1759 * the tree any further.
1760 */
1761 if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP)
1762 return(1);
1763
1764 /*
1765 * If there is a peripheral list generation recorded, make sure
1766 * it hasn't changed.
1767 */
1768 if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1769 && (device->target->bus == cdm->pos.cookie.bus)
1770 && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1771 && (device->target == cdm->pos.cookie.target)
1772 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1773 && (device == cdm->pos.cookie.device)
1774 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
1775 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 0)
1776 && (cdm->pos.generations[CAM_PERIPH_GENERATION] !=
1777 device->generation)){
1778 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1779 return(0);
1780 }
1781
1782 if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1783 && (cdm->pos.cookie.bus == device->target->bus)
1784 && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1785 && (cdm->pos.cookie.target == device->target)
1786 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1787 && (cdm->pos.cookie.device == device)
1788 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
1789 && (cdm->pos.cookie.periph != NULL))
1790 return(xptperiphtraverse(device,
1791 (struct cam_periph *)cdm->pos.cookie.periph,
1792 xptedtperiphfunc, arg));
1793 else
1794 return(xptperiphtraverse(device, NULL, xptedtperiphfunc, arg));
1795 }
1796
1797 static int
1798 xptedtperiphfunc(struct cam_periph *periph, void *arg)
1799 {
1800 struct ccb_dev_match *cdm;
1801 dev_match_ret retval;
1802
1803 cdm = (struct ccb_dev_match *)arg;
1804
1805 retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph);
1806
1807 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1808 cdm->status = CAM_DEV_MATCH_ERROR;
1809 return(0);
1810 }
1811
1812 /*
1813 * If the copy flag is set, copy this peripheral out.
1814 */
1815 if (retval & DM_RET_COPY) {
1816 int spaceleft, j;
1817
1818 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1819 sizeof(struct dev_match_result));
1820
1821 /*
1822 * If we don't have enough space to put in another
1823 * match result, save our position and tell the
1824 * user there are more devices to check.
1825 */
1826 if (spaceleft < sizeof(struct dev_match_result)) {
1827 bzero(&cdm->pos, sizeof(cdm->pos));
1828 cdm->pos.position_type =
1829 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS |
1830 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE |
1831 CAM_DEV_POS_PERIPH;
1832
1833 cdm->pos.cookie.bus = periph->path->bus;
1834 cdm->pos.generations[CAM_BUS_GENERATION]=
1835 xsoftc.bus_generation;
1836 cdm->pos.cookie.target = periph->path->target;
1837 cdm->pos.generations[CAM_TARGET_GENERATION] =
1838 periph->path->bus->generation;
1839 cdm->pos.cookie.device = periph->path->device;
1840 cdm->pos.generations[CAM_DEV_GENERATION] =
1841 periph->path->target->generation;
1842 cdm->pos.cookie.periph = periph;
1843 cdm->pos.generations[CAM_PERIPH_GENERATION] =
1844 periph->path->device->generation;
1845 cdm->status = CAM_DEV_MATCH_MORE;
1846 return(0);
1847 }
1848
1849 j = cdm->num_matches;
1850 cdm->num_matches++;
1851 cdm->matches[j].type = DEV_MATCH_PERIPH;
1852 cdm->matches[j].result.periph_result.path_id =
1853 periph->path->bus->path_id;
1854 cdm->matches[j].result.periph_result.target_id =
1855 periph->path->target->target_id;
1856 cdm->matches[j].result.periph_result.target_lun =
1857 periph->path->device->lun_id;
1858 cdm->matches[j].result.periph_result.unit_number =
1859 periph->unit_number;
1860 strncpy(cdm->matches[j].result.periph_result.periph_name,
1861 periph->periph_name, DEV_IDLEN);
1862 }
1863
1864 return(1);
1865 }
1866
1867 static int
1868 xptedtmatch(struct ccb_dev_match *cdm)
1869 {
1870 int ret;
1871
1872 cdm->num_matches = 0;
1873
1874 /*
1875 * Check the bus list generation. If it has changed, the user
1876 * needs to reset everything and start over.
1877 */
1878 if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1879 && (cdm->pos.generations[CAM_BUS_GENERATION] != 0)
1880 && (cdm->pos.generations[CAM_BUS_GENERATION] != xsoftc.bus_generation)) {
1881 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1882 return(0);
1883 }
1884
1885 if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1886 && (cdm->pos.cookie.bus != NULL))
1887 ret = xptbustraverse((struct cam_eb *)cdm->pos.cookie.bus,
1888 xptedtbusfunc, cdm);
1889 else
1890 ret = xptbustraverse(NULL, xptedtbusfunc, cdm);
1891
1892 /*
1893 * If we get back 0, that means that we had to stop before fully
1894 * traversing the EDT. It also means that one of the subroutines
1895 * has set the status field to the proper value. If we get back 1,
1896 * we've fully traversed the EDT and copied out any matching entries.
1897 */
1898 if (ret == 1)
1899 cdm->status = CAM_DEV_MATCH_LAST;
1900
1901 return(ret);
1902 }
1903
1904 static int
1905 xptplistpdrvfunc(struct periph_driver **pdrv, void *arg)
1906 {
1907 struct ccb_dev_match *cdm;
1908
1909 cdm = (struct ccb_dev_match *)arg;
1910
1911 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
1912 && (cdm->pos.cookie.pdrv == pdrv)
1913 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
1914 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 0)
1915 && (cdm->pos.generations[CAM_PERIPH_GENERATION] !=
1916 (*pdrv)->generation)) {
1917 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1918 return(0);
1919 }
1920
1921 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
1922 && (cdm->pos.cookie.pdrv == pdrv)
1923 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
1924 && (cdm->pos.cookie.periph != NULL))
1925 return(xptpdperiphtraverse(pdrv,
1926 (struct cam_periph *)cdm->pos.cookie.periph,
1927 xptplistperiphfunc, arg));
1928 else
1929 return(xptpdperiphtraverse(pdrv, NULL,xptplistperiphfunc, arg));
1930 }
1931
1932 static int
1933 xptplistperiphfunc(struct cam_periph *periph, void *arg)
1934 {
1935 struct ccb_dev_match *cdm;
1936 dev_match_ret retval;
1937
1938 cdm = (struct ccb_dev_match *)arg;
1939
1940 retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph);
1941
1942 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1943 cdm->status = CAM_DEV_MATCH_ERROR;
1944 return(0);
1945 }
1946
1947 /*
1948 * If the copy flag is set, copy this peripheral out.
1949 */
1950 if (retval & DM_RET_COPY) {
1951 int spaceleft, j;
1952
1953 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1954 sizeof(struct dev_match_result));
1955
1956 /*
1957 * If we don't have enough space to put in another
1958 * match result, save our position and tell the
1959 * user there are more devices to check.
1960 */
1961 if (spaceleft < sizeof(struct dev_match_result)) {
1962 struct periph_driver **pdrv;
1963
1964 pdrv = NULL;
1965 bzero(&cdm->pos, sizeof(cdm->pos));
1966 cdm->pos.position_type =
1967 CAM_DEV_POS_PDRV | CAM_DEV_POS_PDPTR |
1968 CAM_DEV_POS_PERIPH;
1969
1970 /*
1971 * This may look a bit non-sensical, but it is
1972 * actually quite logical. There are very few
1973 * peripheral drivers, and bloating every peripheral
1974 * structure with a pointer back to its parent
1975 * peripheral driver linker set entry would cost
1976 * more in the long run than doing this quick lookup.
1977 */
1978 for (pdrv = periph_drivers; *pdrv != NULL; pdrv++) {
1979 if (strcmp((*pdrv)->driver_name,
1980 periph->periph_name) == 0)
1981 break;
1982 }
1983
1984 if (*pdrv == NULL) {
1985 cdm->status = CAM_DEV_MATCH_ERROR;
1986 return(0);
1987 }
1988
1989 cdm->pos.cookie.pdrv = pdrv;
1990 /*
1991 * The periph generation slot does double duty, as
1992 * does the periph pointer slot. They are used for
1993 * both edt and pdrv lookups and positioning.
1994 */
1995 cdm->pos.cookie.periph = periph;
1996 cdm->pos.generations[CAM_PERIPH_GENERATION] =
1997 (*pdrv)->generation;
1998 cdm->status = CAM_DEV_MATCH_MORE;
1999 return(0);
2000 }
2001
2002 j = cdm->num_matches;
2003 cdm->num_matches++;
2004 cdm->matches[j].type = DEV_MATCH_PERIPH;
2005 cdm->matches[j].result.periph_result.path_id =
2006 periph->path->bus->path_id;
2007
2008 /*
2009 * The transport layer peripheral doesn't have a target or
2010 * lun.
2011 */
2012 if (periph->path->target)
2013 cdm->matches[j].result.periph_result.target_id =
2014 periph->path->target->target_id;
2015 else
2016 cdm->matches[j].result.periph_result.target_id =
2017 CAM_TARGET_WILDCARD;
2018
2019 if (periph->path->device)
2020 cdm->matches[j].result.periph_result.target_lun =
2021 periph->path->device->lun_id;
2022 else
2023 cdm->matches[j].result.periph_result.target_lun =
2024 CAM_LUN_WILDCARD;
2025
2026 cdm->matches[j].result.periph_result.unit_number =
2027 periph->unit_number;
2028 strncpy(cdm->matches[j].result.periph_result.periph_name,
2029 periph->periph_name, DEV_IDLEN);
2030 }
2031
2032 return(1);
2033 }
2034
2035 static int
2036 xptperiphlistmatch(struct ccb_dev_match *cdm)
2037 {
2038 int ret;
2039
2040 cdm->num_matches = 0;
2041
2042 /*
2043 * At this point in the edt traversal function, we check the bus
2044 * list generation to make sure that no busses have been added or
2045 * removed since the user last sent a XPT_DEV_MATCH ccb through.
2046 * For the peripheral driver list traversal function, however, we
2047 * don't have to worry about new peripheral driver types coming or
2048 * going; they're in a linker set, and therefore can't change
2049 * without a recompile.
2050 */
2051
2052 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
2053 && (cdm->pos.cookie.pdrv != NULL))
2054 ret = xptpdrvtraverse(
2055 (struct periph_driver **)cdm->pos.cookie.pdrv,
2056 xptplistpdrvfunc, cdm);
2057 else
2058 ret = xptpdrvtraverse(NULL, xptplistpdrvfunc, cdm);
2059
2060 /*
2061 * If we get back 0, that means that we had to stop before fully
2062 * traversing the peripheral driver tree. It also means that one of
2063 * the subroutines has set the status field to the proper value. If
2064 * we get back 1, we've fully traversed the EDT and copied out any
2065 * matching entries.
2066 */
2067 if (ret == 1)
2068 cdm->status = CAM_DEV_MATCH_LAST;
2069
2070 return(ret);
2071 }
2072
2073 static int
2074 xptbustraverse(struct cam_eb *start_bus, xpt_busfunc_t *tr_func, void *arg)
2075 {
2076 struct cam_eb *bus, *next_bus;
2077 int retval;
2078
2079 retval = 1;
2080
2081 xpt_lock_buses();
2082 for (bus = (start_bus ? start_bus : TAILQ_FIRST(&xsoftc.xpt_busses));
2083 bus != NULL;
2084 bus = next_bus) {
2085
2086 bus->refcount++;
2087
2088 /*
2089 * XXX The locking here is obviously very complex. We
2090 * should work to simplify it.
2091 */
2092 xpt_unlock_buses();
2093 CAM_SIM_LOCK(bus->sim);
2094 retval = tr_func(bus, arg);
2095 CAM_SIM_UNLOCK(bus->sim);
2096
2097 xpt_lock_buses();
2098 next_bus = TAILQ_NEXT(bus, links);
2099 xpt_unlock_buses();
2100
2101 xpt_release_bus(bus);
2102
2103 if (retval == 0)
2104 return(retval);
2105 xpt_lock_buses();
2106 }
2107 xpt_unlock_buses();
2108
2109 return(retval);
2110 }
2111
2112 int
2113 xpt_sim_opened(struct cam_sim *sim)
2114 {
2115 struct cam_eb *bus;
2116 struct cam_et *target;
2117 struct cam_ed *device;
2118 struct cam_periph *periph;
2119
2120 KASSERT(sim->refcount >= 1, ("sim->refcount >= 1"));
2121 mtx_assert(sim->mtx, MA_OWNED);
2122
2123 xpt_lock_buses();
2124 TAILQ_FOREACH(bus, &xsoftc.xpt_busses, links) {
2125 if (bus->sim != sim)
2126 continue;
2127
2128 TAILQ_FOREACH(target, &bus->et_entries, links) {
2129 TAILQ_FOREACH(device, &target->ed_entries, links) {
2130 SLIST_FOREACH(periph, &device->periphs,
2131 periph_links) {
2132 if (periph->refcount > 0) {
2133 xpt_unlock_buses();
2134 return (1);
2135 }
2136 }
2137 }
2138 }
2139 }
2140
2141 xpt_unlock_buses();
2142 return (0);
2143 }
2144
2145 static int
2146 xpttargettraverse(struct cam_eb *bus, struct cam_et *start_target,
2147 xpt_targetfunc_t *tr_func, void *arg)
2148 {
2149 struct cam_et *target, *next_target;
2150 int retval;
2151
2152 mtx_assert(bus->sim->mtx, MA_OWNED);
2153 retval = 1;
2154 for (target = (start_target ? start_target :
2155 TAILQ_FIRST(&bus->et_entries));
2156 target != NULL; target = next_target) {
2157
2158 target->refcount++;
2159
2160 retval = tr_func(target, arg);
2161
2162 next_target = TAILQ_NEXT(target, links);
2163
2164 xpt_release_target(target);
2165
2166 if (retval == 0)
2167 return(retval);
2168 }
2169
2170 return(retval);
2171 }
2172
2173 static int
2174 xptdevicetraverse(struct cam_et *target, struct cam_ed *start_device,
2175 xpt_devicefunc_t *tr_func, void *arg)
2176 {
2177 struct cam_ed *device, *next_device;
2178 int retval;
2179
2180 mtx_assert(target->bus->sim->mtx, MA_OWNED);
2181 retval = 1;
2182 for (device = (start_device ? start_device :
2183 TAILQ_FIRST(&target->ed_entries));
2184 device != NULL;
2185 device = next_device) {
2186
2187 /*
2188 * Hold a reference so the current device does not go away
2189 * on us.
2190 */
2191 device->refcount++;
2192
2193 retval = tr_func(device, arg);
2194
2195 /*
2196 * Grab our next pointer before we release the current
2197 * device.
2198 */
2199 next_device = TAILQ_NEXT(device, links);
2200
2201 xpt_release_device(device);
2202
2203 if (retval == 0)
2204 return(retval);
2205 }
2206
2207 return(retval);
2208 }
2209
2210 static int
2211 xptperiphtraverse(struct cam_ed *device, struct cam_periph *start_periph,
2212 xpt_periphfunc_t *tr_func, void *arg)
2213 {
2214 struct cam_periph *periph, *next_periph;
2215 int retval;
2216
2217 retval = 1;
2218
2219 mtx_assert(device->sim->mtx, MA_OWNED);
2220 xpt_lock_buses();
2221 for (periph = (start_periph ? start_periph :
2222 SLIST_FIRST(&device->periphs));
2223 periph != NULL;
2224 periph = next_periph) {
2225
2226
2227 /*
2228 * In this case, we want to show peripherals that have been
2229 * invalidated, but not peripherals that are scheduled to
2230 * be freed. So instead of calling cam_periph_acquire(),
2231 * which will fail if the periph has been invalidated, we
2232 * just check for the free flag here. If it is in the
2233 * process of being freed, we skip to the next periph.
2234 */
2235 if (periph->flags & CAM_PERIPH_FREE) {
2236 next_periph = SLIST_NEXT(periph, periph_links);
2237 continue;
2238 }
2239
2240 /*
2241 * Acquire a reference to this periph while we call the
2242 * traversal function, so it can't go away.
2243 */
2244 periph->refcount++;
2245
2246 retval = tr_func(periph, arg);
2247
2248 /*
2249 * Grab the next peripheral before we release this one, so
2250 * our next pointer is still valid.
2251 */
2252 next_periph = SLIST_NEXT(periph, periph_links);
2253
2254 cam_periph_release_locked_buses(periph);
2255
2256 if (retval == 0)
2257 goto bailout_done;
2258 }
2259
2260 bailout_done:
2261
2262 xpt_unlock_buses();
2263
2264 return(retval);
2265 }
2266
2267 static int
2268 xptpdrvtraverse(struct periph_driver **start_pdrv,
2269 xpt_pdrvfunc_t *tr_func, void *arg)
2270 {
2271 struct periph_driver **pdrv;
2272 int retval;
2273
2274 retval = 1;
2275
2276 /*
2277 * We don't traverse the peripheral driver list like we do the
2278 * other lists, because it is a linker set, and therefore cannot be
2279 * changed during runtime. If the peripheral driver list is ever
2280 * re-done to be something other than a linker set (i.e. it can
2281 * change while the system is running), the list traversal should
2282 * be modified to work like the other traversal functions.
2283 */
2284 for (pdrv = (start_pdrv ? start_pdrv : periph_drivers);
2285 *pdrv != NULL; pdrv++) {
2286 retval = tr_func(pdrv, arg);
2287
2288 if (retval == 0)
2289 return(retval);
2290 }
2291
2292 return(retval);
2293 }
2294
2295 static int
2296 xptpdperiphtraverse(struct periph_driver **pdrv,
2297 struct cam_periph *start_periph,
2298 xpt_periphfunc_t *tr_func, void *arg)
2299 {
2300 struct cam_periph *periph, *next_periph;
2301 struct cam_sim *sim;
2302 int retval;
2303
2304 retval = 1;
2305
2306 xpt_lock_buses();
2307 for (periph = (start_periph ? start_periph :
2308 TAILQ_FIRST(&(*pdrv)->units)); periph != NULL;
2309 periph = next_periph) {
2310
2311
2312 /*
2313 * In this case, we want to show peripherals that have been
2314 * invalidated, but not peripherals that are scheduled to
2315 * be freed. So instead of calling cam_periph_acquire(),
2316 * which will fail if the periph has been invalidated, we
2317 * just check for the free flag here. If it is free, we
2318 * skip to the next periph.
2319 */
2320 if (periph->flags & CAM_PERIPH_FREE) {
2321 next_periph = TAILQ_NEXT(periph, unit_links);
2322 continue;
2323 }
2324
2325 /*
2326 * Acquire a reference to this periph while we call the
2327 * traversal function, so it can't go away.
2328 */
2329 periph->refcount++;
2330 sim = periph->sim;
2331 xpt_unlock_buses();
2332 CAM_SIM_LOCK(sim);
2333 xpt_lock_buses();
2334 retval = tr_func(periph, arg);
2335
2336 /*
2337 * Grab the next peripheral before we release this one, so
2338 * our next pointer is still valid.
2339 */
2340 next_periph = TAILQ_NEXT(periph, unit_links);
2341
2342 cam_periph_release_locked_buses(periph);
2343 CAM_SIM_UNLOCK(sim);
2344
2345 if (retval == 0)
2346 goto bailout_done;
2347 }
2348 bailout_done:
2349
2350 xpt_unlock_buses();
2351
2352 return(retval);
2353 }
2354
2355 static int
2356 xptdefbusfunc(struct cam_eb *bus, void *arg)
2357 {
2358 struct xpt_traverse_config *tr_config;
2359
2360 tr_config = (struct xpt_traverse_config *)arg;
2361
2362 if (tr_config->depth == XPT_DEPTH_BUS) {
2363 xpt_busfunc_t *tr_func;
2364
2365 tr_func = (xpt_busfunc_t *)tr_config->tr_func;
2366
2367 return(tr_func(bus, tr_config->tr_arg));
2368 } else
2369 return(xpttargettraverse(bus, NULL, xptdeftargetfunc, arg));
2370 }
2371
2372 static int
2373 xptdeftargetfunc(struct cam_et *target, void *arg)
2374 {
2375 struct xpt_traverse_config *tr_config;
2376
2377 tr_config = (struct xpt_traverse_config *)arg;
2378
2379 if (tr_config->depth == XPT_DEPTH_TARGET) {
2380 xpt_targetfunc_t *tr_func;
2381
2382 tr_func = (xpt_targetfunc_t *)tr_config->tr_func;
2383
2384 return(tr_func(target, tr_config->tr_arg));
2385 } else
2386 return(xptdevicetraverse(target, NULL, xptdefdevicefunc, arg));
2387 }
2388
2389 static int
2390 xptdefdevicefunc(struct cam_ed *device, void *arg)
2391 {
2392 struct xpt_traverse_config *tr_config;
2393
2394 tr_config = (struct xpt_traverse_config *)arg;
2395
2396 if (tr_config->depth == XPT_DEPTH_DEVICE) {
2397 xpt_devicefunc_t *tr_func;
2398
2399 tr_func = (xpt_devicefunc_t *)tr_config->tr_func;
2400
2401 return(tr_func(device, tr_config->tr_arg));
2402 } else
2403 return(xptperiphtraverse(device, NULL, xptdefperiphfunc, arg));
2404 }
2405
2406 static int
2407 xptdefperiphfunc(struct cam_periph *periph, void *arg)
2408 {
2409 struct xpt_traverse_config *tr_config;
2410 xpt_periphfunc_t *tr_func;
2411
2412 tr_config = (struct xpt_traverse_config *)arg;
2413
2414 tr_func = (xpt_periphfunc_t *)tr_config->tr_func;
2415
2416 /*
2417 * Unlike the other default functions, we don't check for depth
2418 * here. The peripheral driver level is the last level in the EDT,
2419 * so if we're here, we should execute the function in question.
2420 */
2421 return(tr_func(periph, tr_config->tr_arg));
2422 }
2423
2424 /*
2425 * Execute the given function for every bus in the EDT.
2426 */
2427 static int
2428 xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg)
2429 {
2430 struct xpt_traverse_config tr_config;
2431
2432 tr_config.depth = XPT_DEPTH_BUS;
2433 tr_config.tr_func = tr_func;
2434 tr_config.tr_arg = arg;
2435
2436 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2437 }
2438
2439 /*
2440 * Execute the given function for every device in the EDT.
2441 */
2442 static int
2443 xpt_for_all_devices(xpt_devicefunc_t *tr_func, void *arg)
2444 {
2445 struct xpt_traverse_config tr_config;
2446
2447 tr_config.depth = XPT_DEPTH_DEVICE;
2448 tr_config.tr_func = tr_func;
2449 tr_config.tr_arg = arg;
2450
2451 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2452 }
2453
2454 static int
2455 xptsetasyncfunc(struct cam_ed *device, void *arg)
2456 {
2457 struct cam_path path;
2458 struct ccb_getdev cgd;
2459 struct ccb_setasync *csa = (struct ccb_setasync *)arg;
2460
2461 /*
2462 * Don't report unconfigured devices (Wildcard devs,
2463 * devices only for target mode, device instances
2464 * that have been invalidated but are waiting for
2465 * their last reference count to be released).
2466 */
2467 if ((device->flags & CAM_DEV_UNCONFIGURED) != 0)
2468 return (1);
2469
2470 xpt_compile_path(&path,
2471 NULL,
2472 device->target->bus->path_id,
2473 device->target->target_id,
2474 device->lun_id);
2475 xpt_setup_ccb(&cgd.ccb_h, &path, CAM_PRIORITY_NORMAL);
2476 cgd.ccb_h.func_code = XPT_GDEV_TYPE;
2477 xpt_action((union ccb *)&cgd);
2478 csa->callback(csa->callback_arg,
2479 AC_FOUND_DEVICE,
2480 &path, &cgd);
2481 xpt_release_path(&path);
2482
2483 return(1);
2484 }
2485
2486 static int
2487 xptsetasyncbusfunc(struct cam_eb *bus, void *arg)
2488 {
2489 struct cam_path path;
2490 struct ccb_pathinq cpi;
2491 struct ccb_setasync *csa = (struct ccb_setasync *)arg;
2492
2493 xpt_compile_path(&path, /*periph*/NULL,
2494 bus->path_id,
2495 CAM_TARGET_WILDCARD,
2496 CAM_LUN_WILDCARD);
2497 xpt_setup_ccb(&cpi.ccb_h, &path, CAM_PRIORITY_NORMAL);
2498 cpi.ccb_h.func_code = XPT_PATH_INQ;
2499 xpt_action((union ccb *)&cpi);
2500 csa->callback(csa->callback_arg,
2501 AC_PATH_REGISTERED,
2502 &path, &cpi);
2503 xpt_release_path(&path);
2504
2505 return(1);
2506 }
2507
2508 void
2509 xpt_action(union ccb *start_ccb)
2510 {
2511
2512 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_action\n"));
2513
2514 start_ccb->ccb_h.status = CAM_REQ_INPROG;
2515 (*(start_ccb->ccb_h.path->bus->xport->action))(start_ccb);
2516 }
2517
2518 void
2519 xpt_action_default(union ccb *start_ccb)
2520 {
2521 struct cam_path *path;
2522
2523 path = start_ccb->ccb_h.path;
2524 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_action_default\n"));
2525
2526 switch (start_ccb->ccb_h.func_code) {
2527 case XPT_SCSI_IO:
2528 {
2529 struct cam_ed *device;
2530
2531 /*
2532 * For the sake of compatibility with SCSI-1
2533 * devices that may not understand the identify
2534 * message, we include lun information in the
2535 * second byte of all commands. SCSI-1 specifies
2536 * that luns are a 3 bit value and reserves only 3
2537 * bits for lun information in the CDB. Later
2538 * revisions of the SCSI spec allow for more than 8
2539 * luns, but have deprecated lun information in the
2540 * CDB. So, if the lun won't fit, we must omit.
2541 *
2542 * Also be aware that during initial probing for devices,
2543 * the inquiry information is unknown but initialized to 0.
2544 * This means that this code will be exercised while probing
2545 * devices with an ANSI revision greater than 2.
2546 */
2547 device = path->device;
2548 if (device->protocol_version <= SCSI_REV_2
2549 && start_ccb->ccb_h.target_lun < 8
2550 && (start_ccb->ccb_h.flags & CAM_CDB_POINTER) == 0) {
2551
2552 start_ccb->csio.cdb_io.cdb_bytes[1] |=
2553 start_ccb->ccb_h.target_lun << 5;
2554 }
2555 start_ccb->csio.scsi_status = SCSI_STATUS_OK;
2556 }
2557 /* FALLTHROUGH */
2558 case XPT_TARGET_IO:
2559 case XPT_CONT_TARGET_IO:
2560 start_ccb->csio.sense_resid = 0;
2561 start_ccb->csio.resid = 0;
2562 /* FALLTHROUGH */
2563 case XPT_ATA_IO:
2564 if (start_ccb->ccb_h.func_code == XPT_ATA_IO)
2565 start_ccb->ataio.resid = 0;
2566 /* FALLTHROUGH */
2567 case XPT_RESET_DEV:
2568 case XPT_ENG_EXEC:
2569 case XPT_SMP_IO:
2570 cam_ccbq_insert_ccb(&path->device->ccbq, start_ccb);
2571 if (xpt_schedule_devq(path->bus->sim->devq, path->device))
2572 xpt_run_devq(path->bus->sim->devq);
2573 break;
2574 case XPT_CALC_GEOMETRY:
2575 {
2576 struct cam_sim *sim;
2577
2578 /* Filter out garbage */
2579 if (start_ccb->ccg.block_size == 0
2580 || start_ccb->ccg.volume_size == 0) {
2581 start_ccb->ccg.cylinders = 0;
2582 start_ccb->ccg.heads = 0;
2583 start_ccb->ccg.secs_per_track = 0;
2584 start_ccb->ccb_h.status = CAM_REQ_CMP;
2585 break;
2586 }
2587 #if defined(PC98) || defined(__sparc64__)
2588 /*
2589 * In a PC-98 system, geometry translation depens on
2590 * the "real" device geometry obtained from mode page 4.
2591 * SCSI geometry translation is performed in the
2592 * initialization routine of the SCSI BIOS and the result
2593 * stored in host memory. If the translation is available
2594 * in host memory, use it. If not, rely on the default
2595 * translation the device driver performs.
2596 * For sparc64, we may need adjust the geometry of large
2597 * disks in order to fit the limitations of the 16-bit
2598 * fields of the VTOC8 disk label.
2599 */
2600 if (scsi_da_bios_params(&start_ccb->ccg) != 0) {
2601 start_ccb->ccb_h.status = CAM_REQ_CMP;
2602 break;
2603 }
2604 #endif
2605 sim = path->bus->sim;
2606 (*(sim->sim_action))(sim, start_ccb);
2607 break;
2608 }
2609 case XPT_ABORT:
2610 {
2611 union ccb* abort_ccb;
2612
2613 abort_ccb = start_ccb->cab.abort_ccb;
2614 if (XPT_FC_IS_DEV_QUEUED(abort_ccb)) {
2615
2616 if (abort_ccb->ccb_h.pinfo.index >= 0) {
2617 struct cam_ccbq *ccbq;
2618 struct cam_ed *device;
2619
2620 device = abort_ccb->ccb_h.path->device;
2621 ccbq = &device->ccbq;
2622 cam_ccbq_remove_ccb(ccbq, abort_ccb);
2623 abort_ccb->ccb_h.status =
2624 CAM_REQ_ABORTED|CAM_DEV_QFRZN;
2625 xpt_freeze_devq(abort_ccb->ccb_h.path, 1);
2626 xpt_done(abort_ccb);
2627 start_ccb->ccb_h.status = CAM_REQ_CMP;
2628 break;
2629 }
2630 if (abort_ccb->ccb_h.pinfo.index == CAM_UNQUEUED_INDEX
2631 && (abort_ccb->ccb_h.status & CAM_SIM_QUEUED) == 0) {
2632 /*
2633 * We've caught this ccb en route to
2634 * the SIM. Flag it for abort and the
2635 * SIM will do so just before starting
2636 * real work on the CCB.
2637 */
2638 abort_ccb->ccb_h.status =
2639 CAM_REQ_ABORTED|CAM_DEV_QFRZN;
2640 xpt_freeze_devq(abort_ccb->ccb_h.path, 1);
2641 start_ccb->ccb_h.status = CAM_REQ_CMP;
2642 break;
2643 }
2644 }
2645 if (XPT_FC_IS_QUEUED(abort_ccb)
2646 && (abort_ccb->ccb_h.pinfo.index == CAM_DONEQ_INDEX)) {
2647 /*
2648 * It's already completed but waiting
2649 * for our SWI to get to it.
2650 */
2651 start_ccb->ccb_h.status = CAM_UA_ABORT;
2652 break;
2653 }
2654 /*
2655 * If we weren't able to take care of the abort request
2656 * in the XPT, pass the request down to the SIM for processing.
2657 */
2658 }
2659 /* FALLTHROUGH */
2660 case XPT_ACCEPT_TARGET_IO:
2661 case XPT_EN_LUN:
2662 case XPT_IMMED_NOTIFY:
2663 case XPT_NOTIFY_ACK:
2664 case XPT_RESET_BUS:
2665 case XPT_IMMEDIATE_NOTIFY:
2666 case XPT_NOTIFY_ACKNOWLEDGE:
2667 case XPT_GET_SIM_KNOB:
2668 case XPT_SET_SIM_KNOB:
2669 {
2670 struct cam_sim *sim;
2671
2672 sim = path->bus->sim;
2673 (*(sim->sim_action))(sim, start_ccb);
2674 break;
2675 }
2676 case XPT_PATH_INQ:
2677 {
2678 struct cam_sim *sim;
2679
2680 sim = path->bus->sim;
2681 (*(sim->sim_action))(sim, start_ccb);
2682 break;
2683 }
2684 case XPT_PATH_STATS:
2685 start_ccb->cpis.last_reset = path->bus->last_reset;
2686 start_ccb->ccb_h.status = CAM_REQ_CMP;
2687 break;
2688 case XPT_GDEV_TYPE:
2689 {
2690 struct cam_ed *dev;
2691
2692 dev = path->device;
2693 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) {
2694 start_ccb->ccb_h.status = CAM_DEV_NOT_THERE;
2695 } else {
2696 struct ccb_getdev *cgd;
2697
2698 cgd = &start_ccb->cgd;
2699 cgd->protocol = dev->protocol;
2700 cgd->inq_data = dev->inq_data;
2701 cgd->ident_data = dev->ident_data;
2702 cgd->inq_flags = dev->inq_flags;
2703 cgd->ccb_h.status = CAM_REQ_CMP;
2704 cgd->serial_num_len = dev->serial_num_len;
2705 if ((dev->serial_num_len > 0)
2706 && (dev->serial_num != NULL))
2707 bcopy(dev->serial_num, cgd->serial_num,
2708 dev->serial_num_len);
2709 }
2710 break;
2711 }
2712 case XPT_GDEV_STATS:
2713 {
2714 struct cam_ed *dev;
2715
2716 dev = path->device;
2717 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) {
2718 start_ccb->ccb_h.status = CAM_DEV_NOT_THERE;
2719 } else {
2720 struct ccb_getdevstats *cgds;
2721 struct cam_eb *bus;
2722 struct cam_et *tar;
2723
2724 cgds = &start_ccb->cgds;
2725 bus = path->bus;
2726 tar = path->target;
2727 cgds->dev_openings = dev->ccbq.dev_openings;
2728 cgds->dev_active = dev->ccbq.dev_active;
2729 cgds->devq_openings = dev->ccbq.devq_openings;
2730 cgds->devq_queued = cam_ccbq_pending_ccb_count(&dev->ccbq);
2731 cgds->held = dev->ccbq.held;
2732 cgds->last_reset = tar->last_reset;
2733 cgds->maxtags = dev->maxtags;
2734 cgds->mintags = dev->mintags;
2735 if (timevalcmp(&tar->last_reset, &bus->last_reset, <))
2736 cgds->last_reset = bus->last_reset;
2737 cgds->ccb_h.status = CAM_REQ_CMP;
2738 }
2739 break;
2740 }
2741 case XPT_GDEVLIST:
2742 {
2743 struct cam_periph *nperiph;
2744 struct periph_list *periph_head;
2745 struct ccb_getdevlist *cgdl;
2746 u_int i;
2747 struct cam_ed *device;
2748 int found;
2749
2750
2751 found = 0;
2752
2753 /*
2754 * Don't want anyone mucking with our data.
2755 */
2756 device = path->device;
2757 periph_head = &device->periphs;
2758 cgdl = &start_ccb->cgdl;
2759
2760 /*
2761 * Check and see if the list has changed since the user
2762 * last requested a list member. If so, tell them that the
2763 * list has changed, and therefore they need to start over
2764 * from the beginning.
2765 */
2766 if ((cgdl->index != 0) &&
2767 (cgdl->generation != device->generation)) {
2768 cgdl->status = CAM_GDEVLIST_LIST_CHANGED;
2769 break;
2770 }
2771
2772 /*
2773 * Traverse the list of peripherals and attempt to find
2774 * the requested peripheral.
2775 */
2776 for (nperiph = SLIST_FIRST(periph_head), i = 0;
2777 (nperiph != NULL) && (i <= cgdl->index);
2778 nperiph = SLIST_NEXT(nperiph, periph_links), i++) {
2779 if (i == cgdl->index) {
2780 strncpy(cgdl->periph_name,
2781 nperiph->periph_name,
2782 DEV_IDLEN);
2783 cgdl->unit_number = nperiph->unit_number;
2784 found = 1;
2785 }
2786 }
2787 if (found == 0) {
2788 cgdl->status = CAM_GDEVLIST_ERROR;
2789 break;
2790 }
2791
2792 if (nperiph == NULL)
2793 cgdl->status = CAM_GDEVLIST_LAST_DEVICE;
2794 else
2795 cgdl->status = CAM_GDEVLIST_MORE_DEVS;
2796
2797 cgdl->index++;
2798 cgdl->generation = device->generation;
2799
2800 cgdl->ccb_h.status = CAM_REQ_CMP;
2801 break;
2802 }
2803 case XPT_DEV_MATCH:
2804 {
2805 dev_pos_type position_type;
2806 struct ccb_dev_match *cdm;
2807
2808 cdm = &start_ccb->cdm;
2809
2810 /*
2811 * There are two ways of getting at information in the EDT.
2812 * The first way is via the primary EDT tree. It starts
2813 * with a list of busses, then a list of targets on a bus,
2814 * then devices/luns on a target, and then peripherals on a
2815 * device/lun. The "other" way is by the peripheral driver
2816 * lists. The peripheral driver lists are organized by
2817 * peripheral driver. (obviously) So it makes sense to
2818 * use the peripheral driver list if the user is looking
2819 * for something like "da1", or all "da" devices. If the
2820 * user is looking for something on a particular bus/target
2821 * or lun, it's generally better to go through the EDT tree.
2822 */
2823
2824 if (cdm->pos.position_type != CAM_DEV_POS_NONE)
2825 position_type = cdm->pos.position_type;
2826 else {
2827 u_int i;
2828
2829 position_type = CAM_DEV_POS_NONE;
2830
2831 for (i = 0; i < cdm->num_patterns; i++) {
2832 if ((cdm->patterns[i].type == DEV_MATCH_BUS)
2833 ||(cdm->patterns[i].type == DEV_MATCH_DEVICE)){
2834 position_type = CAM_DEV_POS_EDT;
2835 break;
2836 }
2837 }
2838
2839 if (cdm->num_patterns == 0)
2840 position_type = CAM_DEV_POS_EDT;
2841 else if (position_type == CAM_DEV_POS_NONE)
2842 position_type = CAM_DEV_POS_PDRV;
2843 }
2844
2845 /*
2846 * Note that we drop the SIM lock here, because the EDT
2847 * traversal code needs to do its own locking.
2848 */
2849 CAM_SIM_UNLOCK(xpt_path_sim(cdm->ccb_h.path));
2850 switch(position_type & CAM_DEV_POS_TYPEMASK) {
2851 case CAM_DEV_POS_EDT:
2852 xptedtmatch(cdm);
2853 break;
2854 case CAM_DEV_POS_PDRV:
2855 xptperiphlistmatch(cdm);
2856 break;
2857 default:
2858 cdm->status = CAM_DEV_MATCH_ERROR;
2859 break;
2860 }
2861 CAM_SIM_LOCK(xpt_path_sim(cdm->ccb_h.path));
2862
2863 if (cdm->status == CAM_DEV_MATCH_ERROR)
2864 start_ccb->ccb_h.status = CAM_REQ_CMP_ERR;
2865 else
2866 start_ccb->ccb_h.status = CAM_REQ_CMP;
2867
2868 break;
2869 }
2870 case XPT_SASYNC_CB:
2871 {
2872 struct ccb_setasync *csa;
2873 struct async_node *cur_entry;
2874 struct async_list *async_head;
2875 u_int32_t added;
2876
2877 csa = &start_ccb->csa;
2878 added = csa->event_enable;
2879 async_head = &path->device->asyncs;
2880
2881 /*
2882 * If there is already an entry for us, simply
2883 * update it.
2884 */
2885 cur_entry = SLIST_FIRST(async_head);
2886 while (cur_entry != NULL) {
2887 if ((cur_entry->callback_arg == csa->callback_arg)
2888 && (cur_entry->callback == csa->callback))
2889 break;
2890 cur_entry = SLIST_NEXT(cur_entry, links);
2891 }
2892
2893 if (cur_entry != NULL) {
2894 /*
2895 * If the request has no flags set,
2896 * remove the entry.
2897 */
2898 added &= ~cur_entry->event_enable;
2899 if (csa->event_enable == 0) {
2900 SLIST_REMOVE(async_head, cur_entry,
2901 async_node, links);
2902 xpt_release_device(path->device);
2903 free(cur_entry, M_CAMXPT);
2904 } else {
2905 cur_entry->event_enable = csa->event_enable;
2906 }
2907 csa->event_enable = added;
2908 } else {
2909 cur_entry = malloc(sizeof(*cur_entry), M_CAMXPT,
2910 M_NOWAIT);
2911 if (cur_entry == NULL) {
2912 csa->ccb_h.status = CAM_RESRC_UNAVAIL;
2913 break;
2914 }
2915 cur_entry->event_enable = csa->event_enable;
2916 cur_entry->callback_arg = csa->callback_arg;
2917 cur_entry->callback = csa->callback;
2918 SLIST_INSERT_HEAD(async_head, cur_entry, links);
2919 xpt_acquire_device(path->device);
2920 }
2921 start_ccb->ccb_h.status = CAM_REQ_CMP;
2922 break;
2923 }
2924 case XPT_REL_SIMQ:
2925 {
2926 struct ccb_relsim *crs;
2927 struct cam_ed *dev;
2928
2929 crs = &start_ccb->crs;
2930 dev = path->device;
2931 if (dev == NULL) {
2932
2933 crs->ccb_h.status = CAM_DEV_NOT_THERE;
2934 break;
2935 }
2936
2937 if ((crs->release_flags & RELSIM_ADJUST_OPENINGS) != 0) {
2938
2939 /* Don't ever go below one opening */
2940 if (crs->openings > 0) {
2941 xpt_dev_ccbq_resize(path, crs->openings);
2942 if (bootverbose) {
2943 xpt_print(path,
2944 "number of openings is now %d\n",
2945 crs->openings);
2946 }
2947 }
2948 }
2949
2950 if ((crs->release_flags & RELSIM_RELEASE_AFTER_TIMEOUT) != 0) {
2951
2952 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) {
2953
2954 /*
2955 * Just extend the old timeout and decrement
2956 * the freeze count so that a single timeout
2957 * is sufficient for releasing the queue.
2958 */
2959 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
2960 callout_stop(&dev->callout);
2961 } else {
2962
2963 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
2964 }
2965
2966 callout_reset(&dev->callout,
2967 (crs->release_timeout * hz) / 1000,
2968 xpt_release_devq_timeout, dev);
2969
2970 dev->flags |= CAM_DEV_REL_TIMEOUT_PENDING;
2971
2972 }
2973
2974 if ((crs->release_flags & RELSIM_RELEASE_AFTER_CMDCMPLT) != 0) {
2975
2976 if ((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0) {
2977 /*
2978 * Decrement the freeze count so that a single
2979 * completion is still sufficient to unfreeze
2980 * the queue.
2981 */
2982 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
2983 } else {
2984
2985 dev->flags |= CAM_DEV_REL_ON_COMPLETE;
2986 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
2987 }
2988 }
2989
2990 if ((crs->release_flags & RELSIM_RELEASE_AFTER_QEMPTY) != 0) {
2991
2992 if ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0
2993 || (dev->ccbq.dev_active == 0)) {
2994
2995 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
2996 } else {
2997
2998 dev->flags |= CAM_DEV_REL_ON_QUEUE_EMPTY;
2999 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
3000 }
3001 }
3002
3003 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) == 0)
3004 xpt_release_devq(path, /*count*/1, /*run_queue*/TRUE);
3005 start_ccb->crs.qfrozen_cnt = dev->ccbq.queue.qfrozen_cnt;
3006 start_ccb->ccb_h.status = CAM_REQ_CMP;
3007 break;
3008 }
3009 case XPT_DEBUG: {
3010 struct cam_path *oldpath;
3011 struct cam_sim *oldsim;
3012
3013 /* Check that all request bits are supported. */
3014 if (start_ccb->cdbg.flags & ~(CAM_DEBUG_COMPILE)) {
3015 start_ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
3016 break;
3017 }
3018
3019 cam_dflags = CAM_DEBUG_NONE;
3020 if (cam_dpath != NULL) {
3021 /* To release the old path we must hold proper lock. */
3022 oldpath = cam_dpath;
3023 cam_dpath = NULL;
3024 oldsim = xpt_path_sim(oldpath);
3025 CAM_SIM_UNLOCK(xpt_path_sim(start_ccb->ccb_h.path));
3026 CAM_SIM_LOCK(oldsim);
3027 xpt_free_path(oldpath);
3028 CAM_SIM_UNLOCK(oldsim);
3029 CAM_SIM_LOCK(xpt_path_sim(start_ccb->ccb_h.path));
3030 }
3031 if (start_ccb->cdbg.flags != CAM_DEBUG_NONE) {
3032 if (xpt_create_path(&cam_dpath, NULL,
3033 start_ccb->ccb_h.path_id,
3034 start_ccb->ccb_h.target_id,
3035 start_ccb->ccb_h.target_lun) !=
3036 CAM_REQ_CMP) {
3037 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
3038 } else {
3039 cam_dflags = start_ccb->cdbg.flags;
3040 start_ccb->ccb_h.status = CAM_REQ_CMP;
3041 xpt_print(cam_dpath, "debugging flags now %x\n",
3042 cam_dflags);
3043 }
3044 } else
3045 start_ccb->ccb_h.status = CAM_REQ_CMP;
3046 break;
3047 }
3048 case XPT_NOOP:
3049 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0)
3050 xpt_freeze_devq(path, 1);
3051 start_ccb->ccb_h.status = CAM_REQ_CMP;
3052 break;
3053 default:
3054 case XPT_SDEV_TYPE:
3055 case XPT_TERM_IO:
3056 case XPT_ENG_INQ:
3057 /* XXX Implement */
3058 printf("%s: CCB type %#x not supported\n", __func__,
3059 start_ccb->ccb_h.func_code);
3060 start_ccb->ccb_h.status = CAM_PROVIDE_FAIL;
3061 if (start_ccb->ccb_h.func_code & XPT_FC_DEV_QUEUED) {
3062 xpt_done(start_ccb);
3063 }
3064 break;
3065 }
3066 }
3067
3068 void
3069 xpt_polled_action(union ccb *start_ccb)
3070 {
3071 u_int32_t timeout;
3072 struct cam_sim *sim;
3073 struct cam_devq *devq;
3074 struct cam_ed *dev;
3075
3076
3077 timeout = start_ccb->ccb_h.timeout * 10;
3078 sim = start_ccb->ccb_h.path->bus->sim;
3079 devq = sim->devq;
3080 dev = start_ccb->ccb_h.path->device;
3081
3082 mtx_assert(sim->mtx, MA_OWNED);
3083
3084 /* Don't use ISR for this SIM while polling. */
3085 sim->flags |= CAM_SIM_POLLED;
3086
3087 /*
3088 * Steal an opening so that no other queued requests
3089 * can get it before us while we simulate interrupts.
3090 */
3091 dev->ccbq.devq_openings--;
3092 dev->ccbq.dev_openings--;
3093
3094 while(((devq != NULL && devq->send_openings <= 0) ||
3095 dev->ccbq.dev_openings < 0) && (--timeout > 0)) {
3096 DELAY(100);
3097 (*(sim->sim_poll))(sim);
3098 camisr_runqueue(sim);
3099 }
3100
3101 dev->ccbq.devq_openings++;
3102 dev->ccbq.dev_openings++;
3103
3104 if (timeout != 0) {
3105 xpt_action(start_ccb);
3106 while(--timeout > 0) {
3107 (*(sim->sim_poll))(sim);
3108 camisr_runqueue(sim);
3109 if ((start_ccb->ccb_h.status & CAM_STATUS_MASK)
3110 != CAM_REQ_INPROG)
3111 break;
3112 DELAY(100);
3113 }
3114 if (timeout == 0) {
3115 /*
3116 * XXX Is it worth adding a sim_timeout entry
3117 * point so we can attempt recovery? If
3118 * this is only used for dumps, I don't think
3119 * it is.
3120 */
3121 start_ccb->ccb_h.status = CAM_CMD_TIMEOUT;
3122 }
3123 } else {
3124 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
3125 }
3126
3127 /* We will use CAM ISR for this SIM again. */
3128 sim->flags &= ~CAM_SIM_POLLED;
3129 }
3130
3131 /*
3132 * Schedule a peripheral driver to receive a ccb when it's
3133 * target device has space for more transactions.
3134 */
3135 void
3136 xpt_schedule(struct cam_periph *perph, u_int32_t new_priority)
3137 {
3138 struct cam_ed *device;
3139 int runq = 0;
3140
3141 mtx_assert(perph->sim->mtx, MA_OWNED);
3142
3143 CAM_DEBUG(perph->path, CAM_DEBUG_TRACE, ("xpt_schedule\n"));
3144 device = perph->path->device;
3145 if (periph_is_queued(perph)) {
3146 /* Simply reorder based on new priority */
3147 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE,
3148 (" change priority to %d\n", new_priority));
3149 if (new_priority < perph->pinfo.priority) {
3150 camq_change_priority(&device->drvq,
3151 perph->pinfo.index,
3152 new_priority);
3153 runq = 1;
3154 }
3155 } else {
3156 /* New entry on the queue */
3157 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE,
3158 (" added periph to queue\n"));
3159 perph->pinfo.priority = new_priority;
3160 perph->pinfo.generation = ++device->drvq.generation;
3161 camq_insert(&device->drvq, &perph->pinfo);
3162 runq = 1;
3163 }
3164 if (runq != 0) {
3165 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE,
3166 (" calling xpt_run_dev_allocq\n"));
3167 xpt_run_dev_allocq(device);
3168 }
3169 }
3170
3171
3172 /*
3173 * Schedule a device to run on a given queue.
3174 * If the device was inserted as a new entry on the queue,
3175 * return 1 meaning the device queue should be run. If we
3176 * were already queued, implying someone else has already
3177 * started the queue, return 0 so the caller doesn't attempt
3178 * to run the queue.
3179 */
3180 int
3181 xpt_schedule_dev(struct camq *queue, cam_pinfo *pinfo,
3182 u_int32_t new_priority)
3183 {
3184 int retval;
3185 u_int32_t old_priority;
3186
3187 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_schedule_dev\n"));
3188
3189 old_priority = pinfo->priority;
3190
3191 /*
3192 * Are we already queued?
3193 */
3194 if (pinfo->index != CAM_UNQUEUED_INDEX) {
3195 /* Simply reorder based on new priority */
3196 if (new_priority < old_priority) {
3197 camq_change_priority(queue, pinfo->index,
3198 new_priority);
3199 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3200 ("changed priority to %d\n",
3201 new_priority));
3202 retval = 1;
3203 } else
3204 retval = 0;
3205 } else {
3206 /* New entry on the queue */
3207 if (new_priority < old_priority)
3208 pinfo->priority = new_priority;
3209
3210 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3211 ("Inserting onto queue\n"));
3212 pinfo->generation = ++queue->generation;
3213 camq_insert(queue, pinfo);
3214 retval = 1;
3215 }
3216 return (retval);
3217 }
3218
3219 static void
3220 xpt_run_dev_allocq(struct cam_ed *device)
3221 {
3222 struct camq *drvq;
3223
3224 if (device->ccbq.devq_allocating)
3225 return;
3226 device->ccbq.devq_allocating = 1;
3227 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_allocq(%p)\n", device));
3228 drvq = &device->drvq;
3229 while ((drvq->entries > 0) &&
3230 (device->ccbq.devq_openings > 0 ||
3231 CAMQ_GET_PRIO(drvq) <= CAM_PRIORITY_OOB) &&
3232 (device->ccbq.queue.qfrozen_cnt == 0)) {
3233 union ccb *work_ccb;
3234 struct cam_periph *drv;
3235
3236 KASSERT(drvq->entries > 0, ("xpt_run_dev_allocq: "
3237 "Device on queue without any work to do"));
3238 if ((work_ccb = xpt_get_ccb(device)) != NULL) {
3239 drv = (struct cam_periph*)camq_remove(drvq, CAMQ_HEAD);
3240 xpt_setup_ccb(&work_ccb->ccb_h, drv->path,
3241 drv->pinfo.priority);
3242 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3243 ("calling periph start\n"));
3244 drv->periph_start(drv, work_ccb);
3245 } else {
3246 /*
3247 * Malloc failure in alloc_ccb
3248 */
3249 /*
3250 * XXX add us to a list to be run from free_ccb
3251 * if we don't have any ccbs active on this
3252 * device queue otherwise we may never get run
3253 * again.
3254 */
3255 break;
3256 }
3257 }
3258 device->ccbq.devq_allocating = 0;
3259 }
3260
3261 static void
3262 xpt_run_devq(struct cam_devq *devq)
3263 {
3264 char cdb_str[(SCSI_MAX_CDBLEN * 3) + 1];
3265
3266 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_devq\n"));
3267
3268 devq->send_queue.qfrozen_cnt++;
3269 while ((devq->send_queue.entries > 0)
3270 && (devq->send_openings > 0)
3271 && (devq->send_queue.qfrozen_cnt <= 1)) {
3272 struct cam_ed_qinfo *qinfo;
3273 struct cam_ed *device;
3274 union ccb *work_ccb;
3275 struct cam_sim *sim;
3276
3277 qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->send_queue,
3278 CAMQ_HEAD);
3279 device = qinfo->device;
3280 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3281 ("running device %p\n", device));
3282
3283 work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD);
3284 if (work_ccb == NULL) {
3285 printf("device on run queue with no ccbs???\n");
3286 continue;
3287 }
3288
3289 if ((work_ccb->ccb_h.flags & CAM_HIGH_POWER) != 0) {
3290
3291 mtx_lock(&xsoftc.xpt_lock);
3292 if (xsoftc.num_highpower <= 0) {
3293 /*
3294 * We got a high power command, but we
3295 * don't have any available slots. Freeze
3296 * the device queue until we have a slot
3297 * available.
3298 */
3299 xpt_freeze_devq(work_ccb->ccb_h.path, 1);
3300 STAILQ_INSERT_TAIL(&xsoftc.highpowerq,
3301 work_ccb->ccb_h.path->device,
3302 highpowerq_entry);
3303
3304 mtx_unlock(&xsoftc.xpt_lock);
3305 continue;
3306 } else {
3307 /*
3308 * Consume a high power slot while
3309 * this ccb runs.
3310 */
3311 xsoftc.num_highpower--;
3312 }
3313 mtx_unlock(&xsoftc.xpt_lock);
3314 }
3315 cam_ccbq_remove_ccb(&device->ccbq, work_ccb);
3316 cam_ccbq_send_ccb(&device->ccbq, work_ccb);
3317
3318 devq->send_openings--;
3319 devq->send_active++;
3320
3321 xpt_schedule_devq(devq, device);
3322
3323 if ((work_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0) {
3324 /*
3325 * The client wants to freeze the queue
3326 * after this CCB is sent.
3327 */
3328 xpt_freeze_devq(work_ccb->ccb_h.path, 1);
3329 }
3330
3331 /* In Target mode, the peripheral driver knows best... */
3332 if (work_ccb->ccb_h.func_code == XPT_SCSI_IO) {
3333 if ((device->inq_flags & SID_CmdQue) != 0
3334 && work_ccb->csio.tag_action != CAM_TAG_ACTION_NONE)
3335 work_ccb->ccb_h.flags |= CAM_TAG_ACTION_VALID;
3336 else
3337 /*
3338 * Clear this in case of a retried CCB that
3339 * failed due to a rejected tag.
3340 */
3341 work_ccb->ccb_h.flags &= ~CAM_TAG_ACTION_VALID;
3342 }
3343
3344 switch (work_ccb->ccb_h.func_code) {
3345 case XPT_SCSI_IO:
3346 CAM_DEBUG(work_ccb->ccb_h.path,
3347 CAM_DEBUG_CDB,("%s. CDB: %s\n",
3348 scsi_op_desc(work_ccb->csio.cdb_io.cdb_bytes[0],
3349 &device->inq_data),
3350 scsi_cdb_string(work_ccb->csio.cdb_io.cdb_bytes,
3351 cdb_str, sizeof(cdb_str))));
3352 break;
3353 case XPT_ATA_IO:
3354 CAM_DEBUG(work_ccb->ccb_h.path,
3355 CAM_DEBUG_CDB,("%s. ACB: %s\n",
3356 ata_op_string(&work_ccb->ataio.cmd),
3357 ata_cmd_string(&work_ccb->ataio.cmd,
3358 cdb_str, sizeof(cdb_str))));
3359 break;
3360 default:
3361 break;
3362 }
3363
3364 /*
3365 * Device queues can be shared among multiple sim instances
3366 * that reside on different busses. Use the SIM in the queue
3367 * CCB's path, rather than the one in the bus that was passed
3368 * into this function.
3369 */
3370 sim = work_ccb->ccb_h.path->bus->sim;
3371 (*(sim->sim_action))(sim, work_ccb);
3372 }
3373 devq->send_queue.qfrozen_cnt--;
3374 }
3375
3376 /*
3377 * This function merges stuff from the slave ccb into the master ccb, while
3378 * keeping important fields in the master ccb constant.
3379 */
3380 void
3381 xpt_merge_ccb(union ccb *master_ccb, union ccb *slave_ccb)
3382 {
3383
3384 /*
3385 * Pull fields that are valid for peripheral drivers to set
3386 * into the master CCB along with the CCB "payload".
3387 */
3388 master_ccb->ccb_h.retry_count = slave_ccb->ccb_h.retry_count;
3389 master_ccb->ccb_h.func_code = slave_ccb->ccb_h.func_code;
3390 master_ccb->ccb_h.timeout = slave_ccb->ccb_h.timeout;
3391 master_ccb->ccb_h.flags = slave_ccb->ccb_h.flags;
3392 bcopy(&(&slave_ccb->ccb_h)[1], &(&master_ccb->ccb_h)[1],
3393 sizeof(union ccb) - sizeof(struct ccb_hdr));
3394 }
3395
3396 void
3397 xpt_setup_ccb(struct ccb_hdr *ccb_h, struct cam_path *path, u_int32_t priority)
3398 {
3399
3400 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_setup_ccb\n"));
3401 ccb_h->pinfo.priority = priority;
3402 ccb_h->path = path;
3403 ccb_h->path_id = path->bus->path_id;
3404 if (path->target)
3405 ccb_h->target_id = path->target->target_id;
3406 else
3407 ccb_h->target_id = CAM_TARGET_WILDCARD;
3408 if (path->device) {
3409 ccb_h->target_lun = path->device->lun_id;
3410 ccb_h->pinfo.generation = ++path->device->ccbq.queue.generation;
3411 } else {
3412 ccb_h->target_lun = CAM_TARGET_WILDCARD;
3413 }
3414 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX;
3415 ccb_h->flags = 0;
3416 }
3417
3418 /* Path manipulation functions */
3419 cam_status
3420 xpt_create_path(struct cam_path **new_path_ptr, struct cam_periph *perph,
3421 path_id_t path_id, target_id_t target_id, lun_id_t lun_id)
3422 {
3423 struct cam_path *path;
3424 cam_status status;
3425
3426 path = (struct cam_path *)malloc(sizeof(*path), M_CAMPATH, M_NOWAIT);
3427
3428 if (path == NULL) {
3429 status = CAM_RESRC_UNAVAIL;
3430 return(status);
3431 }
3432 status = xpt_compile_path(path, perph, path_id, target_id, lun_id);
3433 if (status != CAM_REQ_CMP) {
3434 free(path, M_CAMPATH);
3435 path = NULL;
3436 }
3437 *new_path_ptr = path;
3438 return (status);
3439 }
3440
3441 cam_status
3442 xpt_create_path_unlocked(struct cam_path **new_path_ptr,
3443 struct cam_periph *periph, path_id_t path_id,
3444 target_id_t target_id, lun_id_t lun_id)
3445 {
3446 struct cam_path *path;
3447 struct cam_eb *bus = NULL;
3448 cam_status status;
3449
3450 path = (struct cam_path *)malloc(sizeof(*path), M_CAMPATH, M_WAITOK);
3451
3452 bus = xpt_find_bus(path_id);
3453 if (bus != NULL)
3454 CAM_SIM_LOCK(bus->sim);
3455 status = xpt_compile_path(path, periph, path_id, target_id, lun_id);
3456 if (bus != NULL) {
3457 CAM_SIM_UNLOCK(bus->sim);
3458 xpt_release_bus(bus);
3459 }
3460 if (status != CAM_REQ_CMP) {
3461 free(path, M_CAMPATH);
3462 path = NULL;
3463 }
3464 *new_path_ptr = path;
3465 return (status);
3466 }
3467
3468 cam_status
3469 xpt_compile_path(struct cam_path *new_path, struct cam_periph *perph,
3470 path_id_t path_id, target_id_t target_id, lun_id_t lun_id)
3471 {
3472 struct cam_eb *bus;
3473 struct cam_et *target;
3474 struct cam_ed *device;
3475 cam_status status;
3476
3477 status = CAM_REQ_CMP; /* Completed without error */
3478 target = NULL; /* Wildcarded */
3479 device = NULL; /* Wildcarded */
3480
3481 /*
3482 * We will potentially modify the EDT, so block interrupts
3483 * that may attempt to create cam paths.
3484 */
3485 bus = xpt_find_bus(path_id);
3486 if (bus == NULL) {
3487 status = CAM_PATH_INVALID;
3488 } else {
3489 target = xpt_find_target(bus, target_id);
3490 if (target == NULL) {
3491 /* Create one */
3492 struct cam_et *new_target;
3493
3494 new_target = xpt_alloc_target(bus, target_id);
3495 if (new_target == NULL) {
3496 status = CAM_RESRC_UNAVAIL;
3497 } else {
3498 target = new_target;
3499 }
3500 }
3501 if (target != NULL) {
3502 device = xpt_find_device(target, lun_id);
3503 if (device == NULL) {
3504 /* Create one */
3505 struct cam_ed *new_device;
3506
3507 new_device =
3508 (*(bus->xport->alloc_device))(bus,
3509 target,
3510 lun_id);
3511 if (new_device == NULL) {
3512 status = CAM_RESRC_UNAVAIL;
3513 } else {
3514 device = new_device;
3515 }
3516 }
3517 }
3518 }
3519
3520 /*
3521 * Only touch the user's data if we are successful.
3522 */
3523 if (status == CAM_REQ_CMP) {
3524 new_path->periph = perph;
3525 new_path->bus = bus;
3526 new_path->target = target;
3527 new_path->device = device;
3528 CAM_DEBUG(new_path, CAM_DEBUG_TRACE, ("xpt_compile_path\n"));
3529 } else {
3530 if (device != NULL)
3531 xpt_release_device(device);
3532 if (target != NULL)
3533 xpt_release_target(target);
3534 if (bus != NULL)
3535 xpt_release_bus(bus);
3536 }
3537 return (status);
3538 }
3539
3540 void
3541 xpt_release_path(struct cam_path *path)
3542 {
3543 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_path\n"));
3544 if (path->device != NULL) {
3545 xpt_release_device(path->device);
3546 path->device = NULL;
3547 }
3548 if (path->target != NULL) {
3549 xpt_release_target(path->target);
3550 path->target = NULL;
3551 }
3552 if (path->bus != NULL) {
3553 xpt_release_bus(path->bus);
3554 path->bus = NULL;
3555 }
3556 }
3557
3558 void
3559 xpt_free_path(struct cam_path *path)
3560 {
3561
3562 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_free_path\n"));
3563 xpt_release_path(path);
3564 free(path, M_CAMPATH);
3565 }
3566
3567 void
3568 xpt_path_counts(struct cam_path *path, uint32_t *bus_ref,
3569 uint32_t *periph_ref, uint32_t *target_ref, uint32_t *device_ref)
3570 {
3571
3572 xpt_lock_buses();
3573 if (bus_ref) {
3574 if (path->bus)
3575 *bus_ref = path->bus->refcount;
3576 else
3577 *bus_ref = 0;
3578 }
3579 if (periph_ref) {
3580 if (path->periph)
3581 *periph_ref = path->periph->refcount;
3582 else
3583 *periph_ref = 0;
3584 }
3585 xpt_unlock_buses();
3586 if (target_ref) {
3587 if (path->target)
3588 *target_ref = path->target->refcount;
3589 else
3590 *target_ref = 0;
3591 }
3592 if (device_ref) {
3593 if (path->device)
3594 *device_ref = path->device->refcount;
3595 else
3596 *device_ref = 0;
3597 }
3598 }
3599
3600 /*
3601 * Return -1 for failure, 0 for exact match, 1 for match with wildcards
3602 * in path1, 2 for match with wildcards in path2.
3603 */
3604 int
3605 xpt_path_comp(struct cam_path *path1, struct cam_path *path2)
3606 {
3607 int retval = 0;
3608
3609 if (path1->bus != path2->bus) {
3610 if (path1->bus->path_id == CAM_BUS_WILDCARD)
3611 retval = 1;
3612 else if (path2->bus->path_id == CAM_BUS_WILDCARD)
3613 retval = 2;
3614 else
3615 return (-1);
3616 }
3617 if (path1->target != path2->target) {
3618 if (path1->target->target_id == CAM_TARGET_WILDCARD) {
3619 if (retval == 0)
3620 retval = 1;
3621 } else if (path2->target->target_id == CAM_TARGET_WILDCARD)
3622 retval = 2;
3623 else
3624 return (-1);
3625 }
3626 if (path1->device != path2->device) {
3627 if (path1->device->lun_id == CAM_LUN_WILDCARD) {
3628 if (retval == 0)
3629 retval = 1;
3630 } else if (path2->device->lun_id == CAM_LUN_WILDCARD)
3631 retval = 2;
3632 else
3633 return (-1);
3634 }
3635 return (retval);
3636 }
3637
3638 int
3639 xpt_path_comp_dev(struct cam_path *path, struct cam_ed *dev)
3640 {
3641 int retval = 0;
3642
3643 if (path->bus != dev->target->bus) {
3644 if (path->bus->path_id == CAM_BUS_WILDCARD)
3645 retval = 1;
3646 else if (dev->target->bus->path_id == CAM_BUS_WILDCARD)
3647 retval = 2;
3648 else
3649 return (-1);
3650 }
3651 if (path->target != dev->target) {
3652 if (path->target->target_id == CAM_TARGET_WILDCARD) {
3653 if (retval == 0)
3654 retval = 1;
3655 } else if (dev->target->target_id == CAM_TARGET_WILDCARD)
3656 retval = 2;
3657 else
3658 return (-1);
3659 }
3660 if (path->device != dev) {
3661 if (path->device->lun_id == CAM_LUN_WILDCARD) {
3662 if (retval == 0)
3663 retval = 1;
3664 } else if (dev->lun_id == CAM_LUN_WILDCARD)
3665 retval = 2;
3666 else
3667 return (-1);
3668 }
3669 return (retval);
3670 }
3671
3672 void
3673 xpt_print_path(struct cam_path *path)
3674 {
3675
3676 if (path == NULL)
3677 printf("(nopath): ");
3678 else {
3679 if (path->periph != NULL)
3680 printf("(%s%d:", path->periph->periph_name,
3681 path->periph->unit_number);
3682 else
3683 printf("(noperiph:");
3684
3685 if (path->bus != NULL)
3686 printf("%s%d:%d:", path->bus->sim->sim_name,
3687 path->bus->sim->unit_number,
3688 path->bus->sim->bus_id);
3689 else
3690 printf("nobus:");
3691
3692 if (path->target != NULL)
3693 printf("%d:", path->target->target_id);
3694 else
3695 printf("X:");
3696
3697 if (path->device != NULL)
3698 printf("%d): ", path->device->lun_id);
3699 else
3700 printf("X): ");
3701 }
3702 }
3703
3704 void
3705 xpt_print_device(struct cam_ed *device)
3706 {
3707
3708 if (device == NULL)
3709 printf("(nopath): ");
3710 else {
3711 printf("(noperiph:%s%d:%d:%d:%d): ", device->sim->sim_name,
3712 device->sim->unit_number,
3713 device->sim->bus_id,
3714 device->target->target_id,
3715 device->lun_id);
3716 }
3717 }
3718
3719 void
3720 xpt_print(struct cam_path *path, const char *fmt, ...)
3721 {
3722 va_list ap;
3723 xpt_print_path(path);
3724 va_start(ap, fmt);
3725 vprintf(fmt, ap);
3726 va_end(ap);
3727 }
3728
3729 int
3730 xpt_path_string(struct cam_path *path, char *str, size_t str_len)
3731 {
3732 struct sbuf sb;
3733
3734 #ifdef INVARIANTS
3735 if (path != NULL && path->bus != NULL)
3736 mtx_assert(path->bus->sim->mtx, MA_OWNED);
3737 #endif
3738
3739 sbuf_new(&sb, str, str_len, 0);
3740
3741 if (path == NULL)
3742 sbuf_printf(&sb, "(nopath): ");
3743 else {
3744 if (path->periph != NULL)
3745 sbuf_printf(&sb, "(%s%d:", path->periph->periph_name,
3746 path->periph->unit_number);
3747 else
3748 sbuf_printf(&sb, "(noperiph:");
3749
3750 if (path->bus != NULL)
3751 sbuf_printf(&sb, "%s%d:%d:", path->bus->sim->sim_name,
3752 path->bus->sim->unit_number,
3753 path->bus->sim->bus_id);
3754 else
3755 sbuf_printf(&sb, "nobus:");
3756
3757 if (path->target != NULL)
3758 sbuf_printf(&sb, "%d:", path->target->target_id);
3759 else
3760 sbuf_printf(&sb, "X:");
3761
3762 if (path->device != NULL)
3763 sbuf_printf(&sb, "%d): ", path->device->lun_id);
3764 else
3765 sbuf_printf(&sb, "X): ");
3766 }
3767 sbuf_finish(&sb);
3768
3769 return(sbuf_len(&sb));
3770 }
3771
3772 path_id_t
3773 xpt_path_path_id(struct cam_path *path)
3774 {
3775 return(path->bus->path_id);
3776 }
3777
3778 target_id_t
3779 xpt_path_target_id(struct cam_path *path)
3780 {
3781 if (path->target != NULL)
3782 return (path->target->target_id);
3783 else
3784 return (CAM_TARGET_WILDCARD);
3785 }
3786
3787 lun_id_t
3788 xpt_path_lun_id(struct cam_path *path)
3789 {
3790 if (path->device != NULL)
3791 return (path->device->lun_id);
3792 else
3793 return (CAM_LUN_WILDCARD);
3794 }
3795
3796 struct cam_sim *
3797 xpt_path_sim(struct cam_path *path)
3798 {
3799
3800 return (path->bus->sim);
3801 }
3802
3803 struct cam_periph*
3804 xpt_path_periph(struct cam_path *path)
3805 {
3806 mtx_assert(path->bus->sim->mtx, MA_OWNED);
3807
3808 return (path->periph);
3809 }
3810
3811 int
3812 xpt_path_legacy_ata_id(struct cam_path *path)
3813 {
3814 struct cam_eb *bus;
3815 int bus_id;
3816
3817 if ((strcmp(path->bus->sim->sim_name, "ata") != 0) &&
3818 strcmp(path->bus->sim->sim_name, "ahcich") != 0 &&
3819 strcmp(path->bus->sim->sim_name, "mvsch") != 0 &&
3820 strcmp(path->bus->sim->sim_name, "siisch") != 0)
3821 return (-1);
3822
3823 if (strcmp(path->bus->sim->sim_name, "ata") == 0 &&
3824 path->bus->sim->unit_number < 2) {
3825 bus_id = path->bus->sim->unit_number;
3826 } else {
3827 bus_id = 2;
3828 xpt_lock_buses();
3829 TAILQ_FOREACH(bus, &xsoftc.xpt_busses, links) {
3830 if (bus == path->bus)
3831 break;
3832 if ((strcmp(bus->sim->sim_name, "ata") == 0 &&
3833 bus->sim->unit_number >= 2) ||
3834 strcmp(bus->sim->sim_name, "ahcich") == 0 ||
3835 strcmp(bus->sim->sim_name, "mvsch") == 0 ||
3836 strcmp(bus->sim->sim_name, "siisch") == 0)
3837 bus_id++;
3838 }
3839 xpt_unlock_buses();
3840 }
3841 if (path->target != NULL) {
3842 if (path->target->target_id < 2)
3843 return (bus_id * 2 + path->target->target_id);
3844 else
3845 return (-1);
3846 } else
3847 return (bus_id * 2);
3848 }
3849
3850 /*
3851 * Release a CAM control block for the caller. Remit the cost of the structure
3852 * to the device referenced by the path. If the this device had no 'credits'
3853 * and peripheral drivers have registered async callbacks for this notification
3854 * call them now.
3855 */
3856 void
3857 xpt_release_ccb(union ccb *free_ccb)
3858 {
3859 struct cam_path *path;
3860 struct cam_ed *device;
3861 struct cam_eb *bus;
3862 struct cam_sim *sim;
3863
3864 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_release_ccb\n"));
3865 path = free_ccb->ccb_h.path;
3866 device = path->device;
3867 bus = path->bus;
3868 sim = bus->sim;
3869
3870 mtx_assert(sim->mtx, MA_OWNED);
3871
3872 cam_ccbq_release_opening(&device->ccbq);
3873 if (sim->ccb_count > sim->max_ccbs) {
3874 xpt_free_ccb(free_ccb);
3875 sim->ccb_count--;
3876 } else {
3877 SLIST_INSERT_HEAD(&sim->ccb_freeq, &free_ccb->ccb_h,
3878 xpt_links.sle);
3879 }
3880 xpt_run_dev_allocq(device);
3881 }
3882
3883 /* Functions accessed by SIM drivers */
3884
3885 static struct xpt_xport xport_default = {
3886 .alloc_device = xpt_alloc_device_default,
3887 .action = xpt_action_default,
3888 .async = xpt_dev_async_default,
3889 };
3890
3891 /*
3892 * A sim structure, listing the SIM entry points and instance
3893 * identification info is passed to xpt_bus_register to hook the SIM
3894 * into the CAM framework. xpt_bus_register creates a cam_eb entry
3895 * for this new bus and places it in the array of busses and assigns
3896 * it a path_id. The path_id may be influenced by "hard wiring"
3897 * information specified by the user. Once interrupt services are
3898 * available, the bus will be probed.
3899 */
3900 int32_t
3901 xpt_bus_register(struct cam_sim *sim, device_t parent, u_int32_t bus)
3902 {
3903 struct cam_eb *new_bus;
3904 struct cam_eb *old_bus;
3905 struct ccb_pathinq cpi;
3906 struct cam_path *path;
3907 cam_status status;
3908
3909 mtx_assert(sim->mtx, MA_OWNED);
3910
3911 sim->bus_id = bus;
3912 new_bus = (struct cam_eb *)malloc(sizeof(*new_bus),
3913 M_CAMXPT, M_NOWAIT);
3914 if (new_bus == NULL) {
3915 /* Couldn't satisfy request */
3916 return (CAM_RESRC_UNAVAIL);
3917 }
3918
3919 TAILQ_INIT(&new_bus->et_entries);
3920 cam_sim_hold(sim);
3921 new_bus->sim = sim;
3922 timevalclear(&new_bus->last_reset);
3923 new_bus->flags = 0;
3924 new_bus->refcount = 1; /* Held until a bus_deregister event */
3925 new_bus->generation = 0;
3926
3927 xpt_lock_buses();
3928 sim->path_id = new_bus->path_id =
3929 xptpathid(sim->sim_name, sim->unit_number, sim->bus_id);
3930 old_bus = TAILQ_FIRST(&xsoftc.xpt_busses);
3931 while (old_bus != NULL
3932 && old_bus->path_id < new_bus->path_id)
3933 old_bus = TAILQ_NEXT(old_bus, links);
3934 if (old_bus != NULL)
3935 TAILQ_INSERT_BEFORE(old_bus, new_bus, links);
3936 else
3937 TAILQ_INSERT_TAIL(&xsoftc.xpt_busses, new_bus, links);
3938 xsoftc.bus_generation++;
3939 xpt_unlock_buses();
3940
3941 /*
3942 * Set a default transport so that a PATH_INQ can be issued to
3943 * the SIM. This will then allow for probing and attaching of
3944 * a more appropriate transport.
3945 */
3946 new_bus->xport = &xport_default;
3947
3948 status = xpt_create_path(&path, /*periph*/NULL, sim->path_id,
3949 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
3950 if (status != CAM_REQ_CMP) {
3951 xpt_release_bus(new_bus);
3952 free(path, M_CAMXPT);
3953 return (CAM_RESRC_UNAVAIL);
3954 }
3955
3956 xpt_setup_ccb(&cpi.ccb_h, path, CAM_PRIORITY_NORMAL);
3957 cpi.ccb_h.func_code = XPT_PATH_INQ;
3958 xpt_action((union ccb *)&cpi);
3959
3960 if (cpi.ccb_h.status == CAM_REQ_CMP) {
3961 switch (cpi.transport) {
3962 case XPORT_SPI:
3963 case XPORT_SAS:
3964 case XPORT_FC:
3965 case XPORT_USB:
3966 case XPORT_ISCSI:
3967 case XPORT_PPB:
3968 new_bus->xport = scsi_get_xport();
3969 break;
3970 case XPORT_ATA:
3971 case XPORT_SATA:
3972 new_bus->xport = ata_get_xport();
3973 break;
3974 default:
3975 new_bus->xport = &xport_default;
3976 break;
3977 }
3978 }
3979
3980 /* Notify interested parties */
3981 if (sim->path_id != CAM_XPT_PATH_ID) {
3982
3983 xpt_async(AC_PATH_REGISTERED, path, &cpi);
3984 if ((cpi.hba_misc & PIM_NOSCAN) == 0) {
3985 union ccb *scan_ccb;
3986
3987 /* Initiate bus rescan. */
3988 scan_ccb = xpt_alloc_ccb_nowait();
3989 if (scan_ccb != NULL) {
3990 scan_ccb->ccb_h.path = path;
3991 scan_ccb->ccb_h.func_code = XPT_SCAN_BUS;
3992 scan_ccb->crcn.flags = 0;
3993 xpt_rescan(scan_ccb);
3994 } else {
3995 xpt_print(path,
3996 "Can't allocate CCB to scan bus\n");
3997 xpt_free_path(path);
3998 }
3999 } else
4000 xpt_free_path(path);
4001 } else
4002 xpt_free_path(path);
4003 return (CAM_SUCCESS);
4004 }
4005
4006 int32_t
4007 xpt_bus_deregister(path_id_t pathid)
4008 {
4009 struct cam_path bus_path;
4010 cam_status status;
4011
4012 status = xpt_compile_path(&bus_path, NULL, pathid,
4013 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
4014 if (status != CAM_REQ_CMP)
4015 return (status);
4016
4017 xpt_async(AC_LOST_DEVICE, &bus_path, NULL);
4018 xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL);
4019
4020 /* Release the reference count held while registered. */
4021 xpt_release_bus(bus_path.bus);
4022 xpt_release_path(&bus_path);
4023
4024 return (CAM_REQ_CMP);
4025 }
4026
4027 static path_id_t
4028 xptnextfreepathid(void)
4029 {
4030 struct cam_eb *bus;
4031 path_id_t pathid;
4032 const char *strval;
4033
4034 mtx_assert(&xsoftc.xpt_topo_lock, MA_OWNED);
4035 pathid = 0;
4036 bus = TAILQ_FIRST(&xsoftc.xpt_busses);
4037 retry:
4038 /* Find an unoccupied pathid */
4039 while (bus != NULL && bus->path_id <= pathid) {
4040 if (bus->path_id == pathid)
4041 pathid++;
4042 bus = TAILQ_NEXT(bus, links);
4043 }
4044
4045 /*
4046 * Ensure that this pathid is not reserved for
4047 * a bus that may be registered in the future.
4048 */
4049 if (resource_string_value("scbus", pathid, "at", &strval) == 0) {
4050 ++pathid;
4051 /* Start the search over */
4052 goto retry;
4053 }
4054 return (pathid);
4055 }
4056
4057 static path_id_t
4058 xptpathid(const char *sim_name, int sim_unit, int sim_bus)
4059 {
4060 path_id_t pathid;
4061 int i, dunit, val;
4062 char buf[32];
4063 const char *dname;
4064
4065 pathid = CAM_XPT_PATH_ID;
4066 snprintf(buf, sizeof(buf), "%s%d", sim_name, sim_unit);
4067 if (strcmp(buf, "xpt0") == 0 && sim_bus == 0)
4068 return (pathid);
4069 i = 0;
4070 while ((resource_find_match(&i, &dname, &dunit, "at", buf)) == 0) {
4071 if (strcmp(dname, "scbus")) {
4072 /* Avoid a bit of foot shooting. */
4073 continue;
4074 }
4075 if (dunit < 0) /* unwired?! */
4076 continue;
4077 if (resource_int_value("scbus", dunit, "bus", &val) == 0) {
4078 if (sim_bus == val) {
4079 pathid = dunit;
4080 break;
4081 }
4082 } else if (sim_bus == 0) {
4083 /* Unspecified matches bus 0 */
4084 pathid = dunit;
4085 break;
4086 } else {
4087 printf("Ambiguous scbus configuration for %s%d "
4088 "bus %d, cannot wire down. The kernel "
4089 "config entry for scbus%d should "
4090 "specify a controller bus.\n"
4091 "Scbus will be assigned dynamically.\n",
4092 sim_name, sim_unit, sim_bus, dunit);
4093 break;
4094 }
4095 }
4096
4097 if (pathid == CAM_XPT_PATH_ID)
4098 pathid = xptnextfreepathid();
4099 return (pathid);
4100 }
4101
4102 static const char *
4103 xpt_async_string(u_int32_t async_code)
4104 {
4105
4106 switch (async_code) {
4107 case AC_BUS_RESET: return ("AC_BUS_RESET");
4108 case AC_UNSOL_RESEL: return ("AC_UNSOL_RESEL");
4109 case AC_SCSI_AEN: return ("AC_SCSI_AEN");
4110 case AC_SENT_BDR: return ("AC_SENT_BDR");
4111 case AC_PATH_REGISTERED: return ("AC_PATH_REGISTERED");
4112 case AC_PATH_DEREGISTERED: return ("AC_PATH_DEREGISTERED");
4113 case AC_FOUND_DEVICE: return ("AC_FOUND_DEVICE");
4114 case AC_LOST_DEVICE: return ("AC_LOST_DEVICE");
4115 case AC_TRANSFER_NEG: return ("AC_TRANSFER_NEG");
4116 case AC_INQ_CHANGED: return ("AC_INQ_CHANGED");
4117 case AC_GETDEV_CHANGED: return ("AC_GETDEV_CHANGED");
4118 case AC_CONTRACT: return ("AC_CONTRACT");
4119 case AC_ADVINFO_CHANGED: return ("AC_ADVINFO_CHANGED");
4120 case AC_UNIT_ATTENTION: return ("AC_UNIT_ATTENTION");
4121 }
4122 return ("AC_UNKNOWN");
4123 }
4124
4125 void
4126 xpt_async(u_int32_t async_code, struct cam_path *path, void *async_arg)
4127 {
4128 struct cam_eb *bus;
4129 struct cam_et *target, *next_target;
4130 struct cam_ed *device, *next_device;
4131
4132 mtx_assert(path->bus->sim->mtx, MA_OWNED);
4133 CAM_DEBUG(path, CAM_DEBUG_TRACE | CAM_DEBUG_INFO,
4134 ("xpt_async(%s)\n", xpt_async_string(async_code)));
4135
4136 /*
4137 * Most async events come from a CAM interrupt context. In
4138 * a few cases, the error recovery code at the peripheral layer,
4139 * which may run from our SWI or a process context, may signal
4140 * deferred events with a call to xpt_async.
4141 */
4142
4143 bus = path->bus;
4144
4145 if (async_code == AC_BUS_RESET) {
4146 /* Update our notion of when the last reset occurred */
4147 microtime(&bus->last_reset);
4148 }
4149
4150 for (target = TAILQ_FIRST(&bus->et_entries);
4151 target != NULL;
4152 target = next_target) {
4153
4154 next_target = TAILQ_NEXT(target, links);
4155
4156 if (path->target != target
4157 && path->target->target_id != CAM_TARGET_WILDCARD
4158 && target->target_id != CAM_TARGET_WILDCARD)
4159 continue;
4160
4161 if (async_code == AC_SENT_BDR) {
4162 /* Update our notion of when the last reset occurred */
4163 microtime(&path->target->last_reset);
4164 }
4165
4166 for (device = TAILQ_FIRST(&target->ed_entries);
4167 device != NULL;
4168 device = next_device) {
4169
4170 next_device = TAILQ_NEXT(device, links);
4171
4172 if (path->device != device
4173 && path->device->lun_id != CAM_LUN_WILDCARD
4174 && device->lun_id != CAM_LUN_WILDCARD)
4175 continue;
4176 /*
4177 * The async callback could free the device.
4178 * If it is a broadcast async, it doesn't hold
4179 * device reference, so take our own reference.
4180 */
4181 xpt_acquire_device(device);
4182 (*(bus->xport->async))(async_code, bus,
4183 target, device,
4184 async_arg);
4185
4186 xpt_async_bcast(&device->asyncs, async_code,
4187 path, async_arg);
4188 xpt_release_device(device);
4189 }
4190 }
4191
4192 /*
4193 * If this wasn't a fully wildcarded async, tell all
4194 * clients that want all async events.
4195 */
4196 if (bus != xpt_periph->path->bus)
4197 xpt_async_bcast(&xpt_periph->path->device->asyncs, async_code,
4198 path, async_arg);
4199 }
4200
4201 static void
4202 xpt_async_bcast(struct async_list *async_head,
4203 u_int32_t async_code,
4204 struct cam_path *path, void *async_arg)
4205 {
4206 struct async_node *cur_entry;
4207
4208 cur_entry = SLIST_FIRST(async_head);
4209 while (cur_entry != NULL) {
4210 struct async_node *next_entry;
4211 /*
4212 * Grab the next list entry before we call the current
4213 * entry's callback. This is because the callback function
4214 * can delete its async callback entry.
4215 */
4216 next_entry = SLIST_NEXT(cur_entry, links);
4217 if ((cur_entry->event_enable & async_code) != 0)
4218 cur_entry->callback(cur_entry->callback_arg,
4219 async_code, path,
4220 async_arg);
4221 cur_entry = next_entry;
4222 }
4223 }
4224
4225 static void
4226 xpt_dev_async_default(u_int32_t async_code, struct cam_eb *bus,
4227 struct cam_et *target, struct cam_ed *device,
4228 void *async_arg)
4229 {
4230 printf("%s called\n", __func__);
4231 }
4232
4233 u_int32_t
4234 xpt_freeze_devq(struct cam_path *path, u_int count)
4235 {
4236 struct cam_ed *dev = path->device;
4237
4238 mtx_assert(path->bus->sim->mtx, MA_OWNED);
4239 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_freeze_devq() %u->%u\n",
4240 dev->ccbq.queue.qfrozen_cnt, dev->ccbq.queue.qfrozen_cnt + count));
4241 dev->ccbq.queue.qfrozen_cnt += count;
4242 /* Remove frozen device from sendq. */
4243 if (device_is_queued(dev)) {
4244 camq_remove(&dev->sim->devq->send_queue,
4245 dev->devq_entry.pinfo.index);
4246 }
4247 return (dev->ccbq.queue.qfrozen_cnt);
4248 }
4249
4250 u_int32_t
4251 xpt_freeze_simq(struct cam_sim *sim, u_int count)
4252 {
4253
4254 mtx_assert(sim->mtx, MA_OWNED);
4255 sim->devq->send_queue.qfrozen_cnt += count;
4256 return (sim->devq->send_queue.qfrozen_cnt);
4257 }
4258
4259 static void
4260 xpt_release_devq_timeout(void *arg)
4261 {
4262 struct cam_ed *device;
4263
4264 device = (struct cam_ed *)arg;
4265 CAM_DEBUG_DEV(device, CAM_DEBUG_TRACE, ("xpt_release_devq_timeout\n"));
4266 xpt_release_devq_device(device, /*count*/1, /*run_queue*/TRUE);
4267 }
4268
4269 void
4270 xpt_release_devq(struct cam_path *path, u_int count, int run_queue)
4271 {
4272
4273 mtx_assert(path->bus->sim->mtx, MA_OWNED);
4274 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_devq(%d, %d)\n",
4275 count, run_queue));
4276 xpt_release_devq_device(path->device, count, run_queue);
4277 }
4278
4279 void
4280 xpt_release_devq_device(struct cam_ed *dev, u_int count, int run_queue)
4281 {
4282
4283 CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE,
4284 ("xpt_release_devq_device(%d, %d) %u->%u\n", count, run_queue,
4285 dev->ccbq.queue.qfrozen_cnt, dev->ccbq.queue.qfrozen_cnt - count));
4286 if (count > dev->ccbq.queue.qfrozen_cnt) {
4287 #ifdef INVARIANTS
4288 printf("xpt_release_devq(): requested %u > present %u\n",
4289 count, dev->ccbq.queue.qfrozen_cnt);
4290 #endif
4291 count = dev->ccbq.queue.qfrozen_cnt;
4292 }
4293 dev->ccbq.queue.qfrozen_cnt -= count;
4294 if (dev->ccbq.queue.qfrozen_cnt == 0) {
4295 /*
4296 * No longer need to wait for a successful
4297 * command completion.
4298 */
4299 dev->flags &= ~CAM_DEV_REL_ON_COMPLETE;
4300 /*
4301 * Remove any timeouts that might be scheduled
4302 * to release this queue.
4303 */
4304 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) {
4305 callout_stop(&dev->callout);
4306 dev->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING;
4307 }
4308 xpt_run_dev_allocq(dev);
4309 if (run_queue == 0)
4310 return;
4311 /*
4312 * Now that we are unfrozen schedule the
4313 * device so any pending transactions are
4314 * run.
4315 */
4316 if (xpt_schedule_devq(dev->sim->devq, dev))
4317 xpt_run_devq(dev->sim->devq);
4318 }
4319 }
4320
4321 void
4322 xpt_release_simq(struct cam_sim *sim, int run_queue)
4323 {
4324 struct camq *sendq;
4325
4326 mtx_assert(sim->mtx, MA_OWNED);
4327 sendq = &(sim->devq->send_queue);
4328 if (sendq->qfrozen_cnt <= 0) {
4329 #ifdef INVARIANTS
4330 printf("xpt_release_simq: requested 1 > present %u\n",
4331 sendq->qfrozen_cnt);
4332 #endif
4333 } else
4334 sendq->qfrozen_cnt--;
4335 if (sendq->qfrozen_cnt == 0) {
4336 /*
4337 * If there is a timeout scheduled to release this
4338 * sim queue, remove it. The queue frozen count is
4339 * already at 0.
4340 */
4341 if ((sim->flags & CAM_SIM_REL_TIMEOUT_PENDING) != 0){
4342 callout_stop(&sim->callout);
4343 sim->flags &= ~CAM_SIM_REL_TIMEOUT_PENDING;
4344 }
4345 if (run_queue) {
4346 /*
4347 * Now that we are unfrozen run the send queue.
4348 */
4349 xpt_run_devq(sim->devq);
4350 }
4351 }
4352 }
4353
4354 /*
4355 * XXX Appears to be unused.
4356 */
4357 static void
4358 xpt_release_simq_timeout(void *arg)
4359 {
4360 struct cam_sim *sim;
4361
4362 sim = (struct cam_sim *)arg;
4363 xpt_release_simq(sim, /* run_queue */ TRUE);
4364 }
4365
4366 void
4367 xpt_done(union ccb *done_ccb)
4368 {
4369 struct cam_sim *sim;
4370 int first;
4371
4372 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_done\n"));
4373 if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) != 0) {
4374 /*
4375 * Queue up the request for handling by our SWI handler
4376 * any of the "non-immediate" type of ccbs.
4377 */
4378 sim = done_ccb->ccb_h.path->bus->sim;
4379 TAILQ_INSERT_TAIL(&sim->sim_doneq, &done_ccb->ccb_h,
4380 sim_links.tqe);
4381 done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX;
4382 if ((sim->flags & (CAM_SIM_ON_DONEQ | CAM_SIM_POLLED |
4383 CAM_SIM_BATCH)) == 0) {
4384 mtx_lock(&cam_simq_lock);
4385 first = TAILQ_EMPTY(&cam_simq);
4386 TAILQ_INSERT_TAIL(&cam_simq, sim, links);
4387 mtx_unlock(&cam_simq_lock);
4388 sim->flags |= CAM_SIM_ON_DONEQ;
4389 if (first)
4390 swi_sched(cambio_ih, 0);
4391 }
4392 }
4393 }
4394
4395 void
4396 xpt_batch_start(struct cam_sim *sim)
4397 {
4398
4399 KASSERT((sim->flags & CAM_SIM_BATCH) == 0, ("Batch flag already set"));
4400 sim->flags |= CAM_SIM_BATCH;
4401 }
4402
4403 void
4404 xpt_batch_done(struct cam_sim *sim)
4405 {
4406
4407 KASSERT((sim->flags & CAM_SIM_BATCH) != 0, ("Batch flag was not set"));
4408 sim->flags &= ~CAM_SIM_BATCH;
4409 if (!TAILQ_EMPTY(&sim->sim_doneq) &&
4410 (sim->flags & CAM_SIM_ON_DONEQ) == 0)
4411 camisr_runqueue(sim);
4412 }
4413
4414 union ccb *
4415 xpt_alloc_ccb()
4416 {
4417 union ccb *new_ccb;
4418
4419 new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_WAITOK);
4420 return (new_ccb);
4421 }
4422
4423 union ccb *
4424 xpt_alloc_ccb_nowait()
4425 {
4426 union ccb *new_ccb;
4427
4428 new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_NOWAIT);
4429 return (new_ccb);
4430 }
4431
4432 void
4433 xpt_free_ccb(union ccb *free_ccb)
4434 {
4435 free(free_ccb, M_CAMCCB);
4436 }
4437
4438
4439
4440 /* Private XPT functions */
4441
4442 /*
4443 * Get a CAM control block for the caller. Charge the structure to the device
4444 * referenced by the path. If the this device has no 'credits' then the
4445 * device already has the maximum number of outstanding operations under way
4446 * and we return NULL. If we don't have sufficient resources to allocate more
4447 * ccbs, we also return NULL.
4448 */
4449 static union ccb *
4450 xpt_get_ccb(struct cam_ed *device)
4451 {
4452 union ccb *new_ccb;
4453 struct cam_sim *sim;
4454
4455 sim = device->sim;
4456 if ((new_ccb = (union ccb *)SLIST_FIRST(&sim->ccb_freeq)) == NULL) {
4457 new_ccb = xpt_alloc_ccb_nowait();
4458 if (new_ccb == NULL) {
4459 return (NULL);
4460 }
4461 if ((sim->flags & CAM_SIM_MPSAFE) == 0)
4462 callout_handle_init(&new_ccb->ccb_h.timeout_ch);
4463 SLIST_INSERT_HEAD(&sim->ccb_freeq, &new_ccb->ccb_h,
4464 xpt_links.sle);
4465 sim->ccb_count++;
4466 }
4467 cam_ccbq_take_opening(&device->ccbq);
4468 SLIST_REMOVE_HEAD(&sim->ccb_freeq, xpt_links.sle);
4469 return (new_ccb);
4470 }
4471
4472 static void
4473 xpt_release_bus(struct cam_eb *bus)
4474 {
4475
4476 xpt_lock_buses();
4477 KASSERT(bus->refcount >= 1, ("bus->refcount >= 1"));
4478 if (--bus->refcount > 0) {
4479 xpt_unlock_buses();
4480 return;
4481 }
4482 KASSERT(TAILQ_EMPTY(&bus->et_entries),
4483 ("refcount is zero, but target list is not empty"));
4484 TAILQ_REMOVE(&xsoftc.xpt_busses, bus, links);
4485 xsoftc.bus_generation++;
4486 xpt_unlock_buses();
4487 cam_sim_release(bus->sim);
4488 free(bus, M_CAMXPT);
4489 }
4490
4491 static struct cam_et *
4492 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id)
4493 {
4494 struct cam_et *cur_target, *target;
4495
4496 mtx_assert(bus->sim->mtx, MA_OWNED);
4497 target = (struct cam_et *)malloc(sizeof(*target), M_CAMXPT,
4498 M_NOWAIT|M_ZERO);
4499 if (target == NULL)
4500 return (NULL);
4501
4502 TAILQ_INIT(&target->ed_entries);
4503 target->bus = bus;
4504 target->target_id = target_id;
4505 target->refcount = 1;
4506 target->generation = 0;
4507 target->luns = NULL;
4508 timevalclear(&target->last_reset);
4509 /*
4510 * Hold a reference to our parent bus so it
4511 * will not go away before we do.
4512 */
4513 xpt_lock_buses();
4514 bus->refcount++;
4515 xpt_unlock_buses();
4516
4517 /* Insertion sort into our bus's target list */
4518 cur_target = TAILQ_FIRST(&bus->et_entries);
4519 while (cur_target != NULL && cur_target->target_id < target_id)
4520 cur_target = TAILQ_NEXT(cur_target, links);
4521 if (cur_target != NULL) {
4522 TAILQ_INSERT_BEFORE(cur_target, target, links);
4523 } else {
4524 TAILQ_INSERT_TAIL(&bus->et_entries, target, links);
4525 }
4526 bus->generation++;
4527 return (target);
4528 }
4529
4530 static void
4531 xpt_release_target(struct cam_et *target)
4532 {
4533
4534 mtx_assert(target->bus->sim->mtx, MA_OWNED);
4535 if (--target->refcount > 0)
4536 return;
4537 KASSERT(TAILQ_EMPTY(&target->ed_entries),
4538 ("refcount is zero, but device list is not empty"));
4539 TAILQ_REMOVE(&target->bus->et_entries, target, links);
4540 target->bus->generation++;
4541 xpt_release_bus(target->bus);
4542 if (target->luns)
4543 free(target->luns, M_CAMXPT);
4544 free(target, M_CAMXPT);
4545 }
4546
4547 static struct cam_ed *
4548 xpt_alloc_device_default(struct cam_eb *bus, struct cam_et *target,
4549 lun_id_t lun_id)
4550 {
4551 struct cam_ed *device;
4552
4553 device = xpt_alloc_device(bus, target, lun_id);
4554 if (device == NULL)
4555 return (NULL);
4556
4557 device->mintags = 1;
4558 device->maxtags = 1;
4559 bus->sim->max_ccbs += device->ccbq.devq_openings;
4560 return (device);
4561 }
4562
4563 struct cam_ed *
4564 xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, lun_id_t lun_id)
4565 {
4566 struct cam_ed *cur_device, *device;
4567 struct cam_devq *devq;
4568 cam_status status;
4569
4570 mtx_assert(target->bus->sim->mtx, MA_OWNED);
4571 /* Make space for us in the device queue on our bus */
4572 devq = bus->sim->devq;
4573 status = cam_devq_resize(devq, devq->send_queue.array_size + 1);
4574 if (status != CAM_REQ_CMP)
4575 return (NULL);
4576
4577 device = (struct cam_ed *)malloc(sizeof(*device),
4578 M_CAMDEV, M_NOWAIT|M_ZERO);
4579 if (device == NULL)
4580 return (NULL);
4581
4582 cam_init_pinfo(&device->devq_entry.pinfo);
4583 device->devq_entry.device = device;
4584 device->target = target;
4585 device->lun_id = lun_id;
4586 device->sim = bus->sim;
4587 /* Initialize our queues */
4588 if (camq_init(&device->drvq, 0) != 0) {
4589 free(device, M_CAMDEV);
4590 return (NULL);
4591 }
4592 if (cam_ccbq_init(&device->ccbq,
4593 bus->sim->max_dev_openings) != 0) {
4594 camq_fini(&device->drvq);
4595 free(device, M_CAMDEV);
4596 return (NULL);
4597 }
4598 SLIST_INIT(&device->asyncs);
4599 SLIST_INIT(&device->periphs);
4600 device->generation = 0;
4601 device->owner = NULL;
4602 device->flags = CAM_DEV_UNCONFIGURED;
4603 device->tag_delay_count = 0;
4604 device->tag_saved_openings = 0;
4605 device->refcount = 1;
4606 callout_init_mtx(&device->callout, bus->sim->mtx, 0);
4607
4608 cur_device = TAILQ_FIRST(&target->ed_entries);
4609 while (cur_device != NULL && cur_device->lun_id < lun_id)
4610 cur_device = TAILQ_NEXT(cur_device, links);
4611 if (cur_device != NULL)
4612 TAILQ_INSERT_BEFORE(cur_device, device, links);
4613 else
4614 TAILQ_INSERT_TAIL(&target->ed_entries, device, links);
4615 target->refcount++;
4616 target->generation++;
4617 return (device);
4618 }
4619
4620 void
4621 xpt_acquire_device(struct cam_ed *device)
4622 {
4623
4624 mtx_assert(device->sim->mtx, MA_OWNED);
4625 device->refcount++;
4626 }
4627
4628 void
4629 xpt_release_device(struct cam_ed *device)
4630 {
4631 struct cam_devq *devq;
4632
4633 mtx_assert(device->sim->mtx, MA_OWNED);
4634 if (--device->refcount > 0)
4635 return;
4636
4637 KASSERT(SLIST_EMPTY(&device->periphs),
4638 ("refcount is zero, but periphs list is not empty"));
4639 if (device->devq_entry.pinfo.index != CAM_UNQUEUED_INDEX)
4640 panic("Removing device while still queued for ccbs");
4641
4642 if ((device->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0)
4643 callout_stop(&device->callout);
4644
4645 TAILQ_REMOVE(&device->target->ed_entries, device,links);
4646 device->target->generation++;
4647 device->target->bus->sim->max_ccbs -= device->ccbq.devq_openings;
4648 /* Release our slot in the devq */
4649 devq = device->target->bus->sim->devq;
4650 cam_devq_resize(devq, devq->send_queue.array_size - 1);
4651 camq_fini(&device->drvq);
4652 cam_ccbq_fini(&device->ccbq);
4653 /*
4654 * Free allocated memory. free(9) does nothing if the
4655 * supplied pointer is NULL, so it is safe to call without
4656 * checking.
4657 */
4658 free(device->supported_vpds, M_CAMXPT);
4659 free(device->device_id, M_CAMXPT);
4660 free(device->physpath, M_CAMXPT);
4661 free(device->rcap_buf, M_CAMXPT);
4662 free(device->serial_num, M_CAMXPT);
4663
4664 xpt_release_target(device->target);
4665 free(device, M_CAMDEV);
4666 }
4667
4668 u_int32_t
4669 xpt_dev_ccbq_resize(struct cam_path *path, int newopenings)
4670 {
4671 int diff;
4672 int result;
4673 struct cam_ed *dev;
4674
4675 dev = path->device;
4676
4677 diff = newopenings - (dev->ccbq.dev_active + dev->ccbq.dev_openings);
4678 result = cam_ccbq_resize(&dev->ccbq, newopenings);
4679 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
4680 || (dev->inq_flags & SID_CmdQue) != 0)
4681 dev->tag_saved_openings = newopenings;
4682 /* Adjust the global limit */
4683 dev->sim->max_ccbs += diff;
4684 return (result);
4685 }
4686
4687 static struct cam_eb *
4688 xpt_find_bus(path_id_t path_id)
4689 {
4690 struct cam_eb *bus;
4691
4692 xpt_lock_buses();
4693 for (bus = TAILQ_FIRST(&xsoftc.xpt_busses);
4694 bus != NULL;
4695 bus = TAILQ_NEXT(bus, links)) {
4696 if (bus->path_id == path_id) {
4697 bus->refcount++;
4698 break;
4699 }
4700 }
4701 xpt_unlock_buses();
4702 return (bus);
4703 }
4704
4705 static struct cam_et *
4706 xpt_find_target(struct cam_eb *bus, target_id_t target_id)
4707 {
4708 struct cam_et *target;
4709
4710 mtx_assert(bus->sim->mtx, MA_OWNED);
4711 for (target = TAILQ_FIRST(&bus->et_entries);
4712 target != NULL;
4713 target = TAILQ_NEXT(target, links)) {
4714 if (target->target_id == target_id) {
4715 target->refcount++;
4716 break;
4717 }
4718 }
4719 return (target);
4720 }
4721
4722 static struct cam_ed *
4723 xpt_find_device(struct cam_et *target, lun_id_t lun_id)
4724 {
4725 struct cam_ed *device;
4726
4727 mtx_assert(target->bus->sim->mtx, MA_OWNED);
4728 for (device = TAILQ_FIRST(&target->ed_entries);
4729 device != NULL;
4730 device = TAILQ_NEXT(device, links)) {
4731 if (device->lun_id == lun_id) {
4732 device->refcount++;
4733 break;
4734 }
4735 }
4736 return (device);
4737 }
4738
4739 void
4740 xpt_start_tags(struct cam_path *path)
4741 {
4742 struct ccb_relsim crs;
4743 struct cam_ed *device;
4744 struct cam_sim *sim;
4745 int newopenings;
4746
4747 device = path->device;
4748 sim = path->bus->sim;
4749 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT;
4750 xpt_freeze_devq(path, /*count*/1);
4751 device->inq_flags |= SID_CmdQue;
4752 if (device->tag_saved_openings != 0)
4753 newopenings = device->tag_saved_openings;
4754 else
4755 newopenings = min(device->maxtags,
4756 sim->max_tagged_dev_openings);
4757 xpt_dev_ccbq_resize(path, newopenings);
4758 xpt_async(AC_GETDEV_CHANGED, path, NULL);
4759 xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL);
4760 crs.ccb_h.func_code = XPT_REL_SIMQ;
4761 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY;
4762 crs.openings
4763 = crs.release_timeout
4764 = crs.qfrozen_cnt
4765 = 0;
4766 xpt_action((union ccb *)&crs);
4767 }
4768
4769 void
4770 xpt_stop_tags(struct cam_path *path)
4771 {
4772 struct ccb_relsim crs;
4773 struct cam_ed *device;
4774 struct cam_sim *sim;
4775
4776 device = path->device;
4777 sim = path->bus->sim;
4778 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT;
4779 device->tag_delay_count = 0;
4780 xpt_freeze_devq(path, /*count*/1);
4781 device->inq_flags &= ~SID_CmdQue;
4782 xpt_dev_ccbq_resize(path, sim->max_dev_openings);
4783 xpt_async(AC_GETDEV_CHANGED, path, NULL);
4784 xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL);
4785 crs.ccb_h.func_code = XPT_REL_SIMQ;
4786 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY;
4787 crs.openings
4788 = crs.release_timeout
4789 = crs.qfrozen_cnt
4790 = 0;
4791 xpt_action((union ccb *)&crs);
4792 }
4793
4794 static void
4795 xpt_boot_delay(void *arg)
4796 {
4797
4798 xpt_release_boot();
4799 }
4800
4801 static void
4802 xpt_config(void *arg)
4803 {
4804 /*
4805 * Now that interrupts are enabled, go find our devices
4806 */
4807
4808 /* Setup debugging path */
4809 if (cam_dflags != CAM_DEBUG_NONE) {
4810 if (xpt_create_path_unlocked(&cam_dpath, NULL,
4811 CAM_DEBUG_BUS, CAM_DEBUG_TARGET,
4812 CAM_DEBUG_LUN) != CAM_REQ_CMP) {
4813 printf("xpt_config: xpt_create_path() failed for debug"
4814 " target %d:%d:%d, debugging disabled\n",
4815 CAM_DEBUG_BUS, CAM_DEBUG_TARGET, CAM_DEBUG_LUN);
4816 cam_dflags = CAM_DEBUG_NONE;
4817 }
4818 } else
4819 cam_dpath = NULL;
4820
4821 periphdriver_init(1);
4822 xpt_hold_boot();
4823 callout_init(&xsoftc.boot_callout, 1);
4824 callout_reset(&xsoftc.boot_callout, hz * xsoftc.boot_delay / 1000,
4825 xpt_boot_delay, NULL);
4826 /* Fire up rescan thread. */
4827 if (kproc_create(xpt_scanner_thread, NULL, NULL, 0, 0, "xpt_thrd")) {
4828 printf("xpt_config: failed to create rescan thread.\n");
4829 }
4830 }
4831
4832 void
4833 xpt_hold_boot(void)
4834 {
4835 xpt_lock_buses();
4836 xsoftc.buses_to_config++;
4837 xpt_unlock_buses();
4838 }
4839
4840 void
4841 xpt_release_boot(void)
4842 {
4843 xpt_lock_buses();
4844 xsoftc.buses_to_config--;
4845 if (xsoftc.buses_to_config == 0 && xsoftc.buses_config_done == 0) {
4846 struct xpt_task *task;
4847
4848 xsoftc.buses_config_done = 1;
4849 xpt_unlock_buses();
4850 /* Call manually because we don't have any busses */
4851 task = malloc(sizeof(struct xpt_task), M_CAMXPT, M_NOWAIT);
4852 if (task != NULL) {
4853 TASK_INIT(&task->task, 0, xpt_finishconfig_task, task);
4854 taskqueue_enqueue(taskqueue_thread, &task->task);
4855 }
4856 } else
4857 xpt_unlock_buses();
4858 }
4859
4860 /*
4861 * If the given device only has one peripheral attached to it, and if that
4862 * peripheral is the passthrough driver, announce it. This insures that the
4863 * user sees some sort of announcement for every peripheral in their system.
4864 */
4865 static int
4866 xptpassannouncefunc(struct cam_ed *device, void *arg)
4867 {
4868 struct cam_periph *periph;
4869 int i;
4870
4871 for (periph = SLIST_FIRST(&device->periphs), i = 0; periph != NULL;
4872 periph = SLIST_NEXT(periph, periph_links), i++);
4873
4874 periph = SLIST_FIRST(&device->periphs);
4875 if ((i == 1)
4876 && (strncmp(periph->periph_name, "pass", 4) == 0))
4877 xpt_announce_periph(periph, NULL);
4878
4879 return(1);
4880 }
4881
4882 static void
4883 xpt_finishconfig_task(void *context, int pending)
4884 {
4885
4886 periphdriver_init(2);
4887 /*
4888 * Check for devices with no "standard" peripheral driver
4889 * attached. For any devices like that, announce the
4890 * passthrough driver so the user will see something.
4891 */
4892 if (!bootverbose)
4893 xpt_for_all_devices(xptpassannouncefunc, NULL);
4894
4895 /* Release our hook so that the boot can continue. */
4896 config_intrhook_disestablish(xsoftc.xpt_config_hook);
4897 free(xsoftc.xpt_config_hook, M_CAMXPT);
4898 xsoftc.xpt_config_hook = NULL;
4899
4900 free(context, M_CAMXPT);
4901 }
4902
4903 cam_status
4904 xpt_register_async(int event, ac_callback_t *cbfunc, void *cbarg,
4905 struct cam_path *path)
4906 {
4907 struct ccb_setasync csa;
4908 cam_status status;
4909 int xptpath = 0;
4910
4911 if (path == NULL) {
4912 mtx_lock(&xsoftc.xpt_lock);
4913 status = xpt_create_path(&path, /*periph*/NULL, CAM_XPT_PATH_ID,
4914 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
4915 if (status != CAM_REQ_CMP) {
4916 mtx_unlock(&xsoftc.xpt_lock);
4917 return (status);
4918 }
4919 xptpath = 1;
4920 }
4921
4922 xpt_setup_ccb(&csa.ccb_h, path, CAM_PRIORITY_NORMAL);
4923 csa.ccb_h.func_code = XPT_SASYNC_CB;
4924 csa.event_enable = event;
4925 csa.callback = cbfunc;
4926 csa.callback_arg = cbarg;
4927 xpt_action((union ccb *)&csa);
4928 status = csa.ccb_h.status;
4929
4930 if (xptpath) {
4931 xpt_free_path(path);
4932 mtx_unlock(&xsoftc.xpt_lock);
4933 }
4934
4935 if ((status == CAM_REQ_CMP) &&
4936 (csa.event_enable & AC_FOUND_DEVICE)) {
4937 /*
4938 * Get this peripheral up to date with all
4939 * the currently existing devices.
4940 */
4941 xpt_for_all_devices(xptsetasyncfunc, &csa);
4942 }
4943 if ((status == CAM_REQ_CMP) &&
4944 (csa.event_enable & AC_PATH_REGISTERED)) {
4945 /*
4946 * Get this peripheral up to date with all
4947 * the currently existing busses.
4948 */
4949 xpt_for_all_busses(xptsetasyncbusfunc, &csa);
4950 }
4951
4952 return (status);
4953 }
4954
4955 static void
4956 xptaction(struct cam_sim *sim, union ccb *work_ccb)
4957 {
4958 CAM_DEBUG(work_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xptaction\n"));
4959
4960 switch (work_ccb->ccb_h.func_code) {
4961 /* Common cases first */
4962 case XPT_PATH_INQ: /* Path routing inquiry */
4963 {
4964 struct ccb_pathinq *cpi;
4965
4966 cpi = &work_ccb->cpi;
4967 cpi->version_num = 1; /* XXX??? */
4968 cpi->hba_inquiry = 0;
4969 cpi->target_sprt = 0;
4970 cpi->hba_misc = 0;
4971 cpi->hba_eng_cnt = 0;
4972 cpi->max_target = 0;
4973 cpi->max_lun = 0;
4974 cpi->initiator_id = 0;
4975 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
4976 strncpy(cpi->hba_vid, "", HBA_IDLEN);
4977 strncpy(cpi->dev_name, sim->sim_name, DEV_IDLEN);
4978 cpi->unit_number = sim->unit_number;
4979 cpi->bus_id = sim->bus_id;
4980 cpi->base_transfer_speed = 0;
4981 cpi->protocol = PROTO_UNSPECIFIED;
4982 cpi->protocol_version = PROTO_VERSION_UNSPECIFIED;
4983 cpi->transport = XPORT_UNSPECIFIED;
4984 cpi->transport_version = XPORT_VERSION_UNSPECIFIED;
4985 cpi->ccb_h.status = CAM_REQ_CMP;
4986 xpt_done(work_ccb);
4987 break;
4988 }
4989 default:
4990 work_ccb->ccb_h.status = CAM_REQ_INVALID;
4991 xpt_done(work_ccb);
4992 break;
4993 }
4994 }
4995
4996 /*
4997 * The xpt as a "controller" has no interrupt sources, so polling
4998 * is a no-op.
4999 */
5000 static void
5001 xptpoll(struct cam_sim *sim)
5002 {
5003 }
5004
5005 void
5006 xpt_lock_buses(void)
5007 {
5008 mtx_lock(&xsoftc.xpt_topo_lock);
5009 }
5010
5011 void
5012 xpt_unlock_buses(void)
5013 {
5014 mtx_unlock(&xsoftc.xpt_topo_lock);
5015 }
5016
5017 static void
5018 camisr(void *dummy)
5019 {
5020 cam_simq_t queue;
5021 struct cam_sim *sim;
5022
5023 mtx_lock(&cam_simq_lock);
5024 TAILQ_INIT(&queue);
5025 while (!TAILQ_EMPTY(&cam_simq)) {
5026 TAILQ_CONCAT(&queue, &cam_simq, links);
5027 mtx_unlock(&cam_simq_lock);
5028
5029 while ((sim = TAILQ_FIRST(&queue)) != NULL) {
5030 TAILQ_REMOVE(&queue, sim, links);
5031 CAM_SIM_LOCK(sim);
5032 camisr_runqueue(sim);
5033 sim->flags &= ~CAM_SIM_ON_DONEQ;
5034 CAM_SIM_UNLOCK(sim);
5035 }
5036 mtx_lock(&cam_simq_lock);
5037 }
5038 mtx_unlock(&cam_simq_lock);
5039 }
5040
5041 static void
5042 camisr_runqueue(struct cam_sim *sim)
5043 {
5044 struct ccb_hdr *ccb_h;
5045
5046 while ((ccb_h = TAILQ_FIRST(&sim->sim_doneq)) != NULL) {
5047 int runq;
5048
5049 TAILQ_REMOVE(&sim->sim_doneq, ccb_h, sim_links.tqe);
5050 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX;
5051
5052 CAM_DEBUG(ccb_h->path, CAM_DEBUG_TRACE,
5053 ("camisr\n"));
5054
5055 runq = FALSE;
5056
5057 if (ccb_h->flags & CAM_HIGH_POWER) {
5058 struct highpowerlist *hphead;
5059 struct cam_ed *device;
5060
5061 mtx_lock(&xsoftc.xpt_lock);
5062 hphead = &xsoftc.highpowerq;
5063
5064 device = STAILQ_FIRST(hphead);
5065
5066 /*
5067 * Increment the count since this command is done.
5068 */
5069 xsoftc.num_highpower++;
5070
5071 /*
5072 * Any high powered commands queued up?
5073 */
5074 if (device != NULL) {
5075
5076 STAILQ_REMOVE_HEAD(hphead, highpowerq_entry);
5077 mtx_unlock(&xsoftc.xpt_lock);
5078
5079 xpt_release_devq_device(device,
5080 /*count*/1, /*runqueue*/TRUE);
5081 } else
5082 mtx_unlock(&xsoftc.xpt_lock);
5083 }
5084
5085 if ((ccb_h->func_code & XPT_FC_USER_CCB) == 0) {
5086 struct cam_ed *dev;
5087
5088 dev = ccb_h->path->device;
5089
5090 cam_ccbq_ccb_done(&dev->ccbq, (union ccb *)ccb_h);
5091 sim->devq->send_active--;
5092 sim->devq->send_openings++;
5093 runq = TRUE;
5094
5095 if (((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0
5096 && (dev->ccbq.dev_active == 0))) {
5097 dev->flags &= ~CAM_DEV_REL_ON_QUEUE_EMPTY;
5098 xpt_release_devq(ccb_h->path, /*count*/1,
5099 /*run_queue*/FALSE);
5100 }
5101
5102 if (((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0
5103 && (ccb_h->status&CAM_STATUS_MASK) != CAM_REQUEUE_REQ)) {
5104 dev->flags &= ~CAM_DEV_REL_ON_COMPLETE;
5105 xpt_release_devq(ccb_h->path, /*count*/1,
5106 /*run_queue*/FALSE);
5107 }
5108
5109 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
5110 && (--dev->tag_delay_count == 0))
5111 xpt_start_tags(ccb_h->path);
5112 if (!device_is_queued(dev)) {
5113 (void)xpt_schedule_devq(sim->devq, dev);
5114 }
5115 }
5116
5117 if (ccb_h->status & CAM_RELEASE_SIMQ) {
5118 xpt_release_simq(sim, /*run_queue*/TRUE);
5119 ccb_h->status &= ~CAM_RELEASE_SIMQ;
5120 runq = FALSE;
5121 }
5122
5123 if ((ccb_h->flags & CAM_DEV_QFRZDIS)
5124 && (ccb_h->status & CAM_DEV_QFRZN)) {
5125 xpt_release_devq(ccb_h->path, /*count*/1,
5126 /*run_queue*/TRUE);
5127 ccb_h->status &= ~CAM_DEV_QFRZN;
5128 } else if (runq) {
5129 xpt_run_devq(sim->devq);
5130 }
5131
5132 /* Call the peripheral driver's callback */
5133 (*ccb_h->cbfcnp)(ccb_h->path->periph, (union ccb *)ccb_h);
5134 }
5135 }
Cache object: bc0018dabebfc0e44898d2884d6f7a18
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