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/ktr.h>
40 #include <sys/time.h>
41 #include <sys/conf.h>
42 #include <sys/fcntl.h>
43 #include <sys/interrupt.h>
44 #include <sys/proc.h>
45 #include <sys/sbuf.h>
46 #include <sys/smp.h>
47 #include <sys/taskqueue.h>
48
49 #include <sys/lock.h>
50 #include <sys/mutex.h>
51 #include <sys/sysctl.h>
52 #include <sys/kthread.h>
53
54 #include <cam/cam.h>
55 #include <cam/cam_ccb.h>
56 #include <cam/cam_periph.h>
57 #include <cam/cam_queue.h>
58 #include <cam/cam_sim.h>
59 #include <cam/cam_xpt.h>
60 #include <cam/cam_xpt_sim.h>
61 #include <cam/cam_xpt_periph.h>
62 #include <cam/cam_xpt_internal.h>
63 #include <cam/cam_debug.h>
64 #include <cam/cam_compat.h>
65
66 #include <cam/scsi/scsi_all.h>
67 #include <cam/scsi/scsi_message.h>
68 #include <cam/scsi/scsi_pass.h>
69
70 #include <machine/md_var.h> /* geometry translation */
71 #include <machine/stdarg.h> /* for xpt_print below */
72
73 #include "opt_cam.h"
74
75 /*
76 * This is the maximum number of high powered commands (e.g. start unit)
77 * that can be outstanding at a particular time.
78 */
79 #ifndef CAM_MAX_HIGHPOWER
80 #define CAM_MAX_HIGHPOWER 4
81 #endif
82
83 /* Datastructures internal to the xpt layer */
84 MALLOC_DEFINE(M_CAMXPT, "CAM XPT", "CAM XPT buffers");
85 MALLOC_DEFINE(M_CAMDEV, "CAM DEV", "CAM devices");
86 MALLOC_DEFINE(M_CAMCCB, "CAM CCB", "CAM CCBs");
87 MALLOC_DEFINE(M_CAMPATH, "CAM path", "CAM paths");
88
89 /* Object for defering XPT actions to a taskqueue */
90 struct xpt_task {
91 struct task task;
92 void *data1;
93 uintptr_t data2;
94 };
95
96 struct xpt_softc {
97 /* number of high powered commands that can go through right now */
98 struct mtx xpt_highpower_lock;
99 STAILQ_HEAD(highpowerlist, cam_ed) highpowerq;
100 int num_highpower;
101
102 /* queue for handling async rescan requests. */
103 TAILQ_HEAD(, ccb_hdr) ccb_scanq;
104 int buses_to_config;
105 int buses_config_done;
106
107 /* Registered busses */
108 TAILQ_HEAD(,cam_eb) xpt_busses;
109 u_int bus_generation;
110
111 struct intr_config_hook *xpt_config_hook;
112
113 int boot_delay;
114 struct callout boot_callout;
115
116 struct mtx xpt_topo_lock;
117 struct mtx xpt_lock;
118 struct taskqueue *xpt_taskq;
119 };
120
121 typedef enum {
122 DM_RET_COPY = 0x01,
123 DM_RET_FLAG_MASK = 0x0f,
124 DM_RET_NONE = 0x00,
125 DM_RET_STOP = 0x10,
126 DM_RET_DESCEND = 0x20,
127 DM_RET_ERROR = 0x30,
128 DM_RET_ACTION_MASK = 0xf0
129 } dev_match_ret;
130
131 typedef enum {
132 XPT_DEPTH_BUS,
133 XPT_DEPTH_TARGET,
134 XPT_DEPTH_DEVICE,
135 XPT_DEPTH_PERIPH
136 } xpt_traverse_depth;
137
138 struct xpt_traverse_config {
139 xpt_traverse_depth depth;
140 void *tr_func;
141 void *tr_arg;
142 };
143
144 typedef int xpt_busfunc_t (struct cam_eb *bus, void *arg);
145 typedef int xpt_targetfunc_t (struct cam_et *target, void *arg);
146 typedef int xpt_devicefunc_t (struct cam_ed *device, void *arg);
147 typedef int xpt_periphfunc_t (struct cam_periph *periph, void *arg);
148 typedef int xpt_pdrvfunc_t (struct periph_driver **pdrv, void *arg);
149
150 /* Transport layer configuration information */
151 static struct xpt_softc xsoftc;
152
153 MTX_SYSINIT(xpt_topo_init, &xsoftc.xpt_topo_lock, "XPT topology lock", MTX_DEF);
154
155 TUNABLE_INT("kern.cam.boot_delay", &xsoftc.boot_delay);
156 SYSCTL_INT(_kern_cam, OID_AUTO, boot_delay, CTLFLAG_RDTUN,
157 &xsoftc.boot_delay, 0, "Bus registration wait time");
158
159 /* Queues for our software interrupt handler */
160 typedef TAILQ_HEAD(cam_isrq, ccb_hdr) cam_isrq_t;
161 typedef TAILQ_HEAD(cam_simq, cam_sim) cam_simq_t;
162
163 struct cam_doneq {
164 struct mtx_padalign cam_doneq_mtx;
165 STAILQ_HEAD(, ccb_hdr) cam_doneq;
166 int cam_doneq_sleep;
167 };
168
169 static struct cam_doneq cam_doneqs[MAXCPU];
170 static int cam_num_doneqs;
171 static struct proc *cam_proc;
172
173 TUNABLE_INT("kern.cam.num_doneqs", &cam_num_doneqs);
174 SYSCTL_INT(_kern_cam, OID_AUTO, num_doneqs, CTLFLAG_RDTUN,
175 &cam_num_doneqs, 0, "Number of completion queues/threads");
176
177 struct cam_periph *xpt_periph;
178
179 static periph_init_t xpt_periph_init;
180
181 static struct periph_driver xpt_driver =
182 {
183 xpt_periph_init, "xpt",
184 TAILQ_HEAD_INITIALIZER(xpt_driver.units), /* generation */ 0,
185 CAM_PERIPH_DRV_EARLY
186 };
187
188 PERIPHDRIVER_DECLARE(xpt, xpt_driver);
189
190 static d_open_t xptopen;
191 static d_close_t xptclose;
192 static d_ioctl_t xptioctl;
193 static d_ioctl_t xptdoioctl;
194
195 static struct cdevsw xpt_cdevsw = {
196 .d_version = D_VERSION,
197 .d_flags = 0,
198 .d_open = xptopen,
199 .d_close = xptclose,
200 .d_ioctl = xptioctl,
201 .d_name = "xpt",
202 };
203
204 /* Storage for debugging datastructures */
205 struct cam_path *cam_dpath;
206 u_int32_t cam_dflags = CAM_DEBUG_FLAGS;
207 TUNABLE_INT("kern.cam.dflags", &cam_dflags);
208 SYSCTL_UINT(_kern_cam, OID_AUTO, dflags, CTLFLAG_RW,
209 &cam_dflags, 0, "Enabled debug flags");
210 u_int32_t cam_debug_delay = CAM_DEBUG_DELAY;
211 TUNABLE_INT("kern.cam.debug_delay", &cam_debug_delay);
212 SYSCTL_UINT(_kern_cam, OID_AUTO, debug_delay, CTLFLAG_RW,
213 &cam_debug_delay, 0, "Delay in us after each debug message");
214
215 /* Our boot-time initialization hook */
216 static int cam_module_event_handler(module_t, int /*modeventtype_t*/, void *);
217
218 static moduledata_t cam_moduledata = {
219 "cam",
220 cam_module_event_handler,
221 NULL
222 };
223
224 static int xpt_init(void *);
225
226 DECLARE_MODULE(cam, cam_moduledata, SI_SUB_CONFIGURE, SI_ORDER_SECOND);
227 MODULE_VERSION(cam, 1);
228
229
230 static void xpt_async_bcast(struct async_list *async_head,
231 u_int32_t async_code,
232 struct cam_path *path,
233 void *async_arg);
234 static path_id_t xptnextfreepathid(void);
235 static path_id_t xptpathid(const char *sim_name, int sim_unit, int sim_bus);
236 static union ccb *xpt_get_ccb(struct cam_periph *periph);
237 static union ccb *xpt_get_ccb_nowait(struct cam_periph *periph);
238 static void xpt_run_allocq(struct cam_periph *periph, int sleep);
239 static void xpt_run_allocq_task(void *context, int pending);
240 static void xpt_run_devq(struct cam_devq *devq);
241 static timeout_t xpt_release_devq_timeout;
242 static void xpt_release_simq_timeout(void *arg) __unused;
243 static void xpt_acquire_bus(struct cam_eb *bus);
244 static void xpt_release_bus(struct cam_eb *bus);
245 static uint32_t xpt_freeze_devq_device(struct cam_ed *dev, u_int count);
246 static int xpt_release_devq_device(struct cam_ed *dev, u_int count,
247 int run_queue);
248 static struct cam_et*
249 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id);
250 static void xpt_acquire_target(struct cam_et *target);
251 static void xpt_release_target(struct cam_et *target);
252 static struct cam_eb*
253 xpt_find_bus(path_id_t path_id);
254 static struct cam_et*
255 xpt_find_target(struct cam_eb *bus, target_id_t target_id);
256 static struct cam_ed*
257 xpt_find_device(struct cam_et *target, lun_id_t lun_id);
258 static void xpt_config(void *arg);
259 static int xpt_schedule_dev(struct camq *queue, cam_pinfo *dev_pinfo,
260 u_int32_t new_priority);
261 static xpt_devicefunc_t xptpassannouncefunc;
262 static void xptaction(struct cam_sim *sim, union ccb *work_ccb);
263 static void xptpoll(struct cam_sim *sim);
264 static void camisr_runqueue(void);
265 static void xpt_done_process(struct ccb_hdr *ccb_h);
266 static void xpt_done_td(void *);
267 static dev_match_ret xptbusmatch(struct dev_match_pattern *patterns,
268 u_int num_patterns, struct cam_eb *bus);
269 static dev_match_ret xptdevicematch(struct dev_match_pattern *patterns,
270 u_int num_patterns,
271 struct cam_ed *device);
272 static dev_match_ret xptperiphmatch(struct dev_match_pattern *patterns,
273 u_int num_patterns,
274 struct cam_periph *periph);
275 static xpt_busfunc_t xptedtbusfunc;
276 static xpt_targetfunc_t xptedttargetfunc;
277 static xpt_devicefunc_t xptedtdevicefunc;
278 static xpt_periphfunc_t xptedtperiphfunc;
279 static xpt_pdrvfunc_t xptplistpdrvfunc;
280 static xpt_periphfunc_t xptplistperiphfunc;
281 static int xptedtmatch(struct ccb_dev_match *cdm);
282 static int xptperiphlistmatch(struct ccb_dev_match *cdm);
283 static int xptbustraverse(struct cam_eb *start_bus,
284 xpt_busfunc_t *tr_func, void *arg);
285 static int xpttargettraverse(struct cam_eb *bus,
286 struct cam_et *start_target,
287 xpt_targetfunc_t *tr_func, void *arg);
288 static int xptdevicetraverse(struct cam_et *target,
289 struct cam_ed *start_device,
290 xpt_devicefunc_t *tr_func, void *arg);
291 static int xptperiphtraverse(struct cam_ed *device,
292 struct cam_periph *start_periph,
293 xpt_periphfunc_t *tr_func, void *arg);
294 static int xptpdrvtraverse(struct periph_driver **start_pdrv,
295 xpt_pdrvfunc_t *tr_func, void *arg);
296 static int xptpdperiphtraverse(struct periph_driver **pdrv,
297 struct cam_periph *start_periph,
298 xpt_periphfunc_t *tr_func,
299 void *arg);
300 static xpt_busfunc_t xptdefbusfunc;
301 static xpt_targetfunc_t xptdeftargetfunc;
302 static xpt_devicefunc_t xptdefdevicefunc;
303 static xpt_periphfunc_t xptdefperiphfunc;
304 static void xpt_finishconfig_task(void *context, int pending);
305 static void xpt_dev_async_default(u_int32_t async_code,
306 struct cam_eb *bus,
307 struct cam_et *target,
308 struct cam_ed *device,
309 void *async_arg);
310 static struct cam_ed * xpt_alloc_device_default(struct cam_eb *bus,
311 struct cam_et *target,
312 lun_id_t lun_id);
313 static xpt_devicefunc_t xptsetasyncfunc;
314 static xpt_busfunc_t xptsetasyncbusfunc;
315 static cam_status xptregister(struct cam_periph *periph,
316 void *arg);
317 static __inline int device_is_queued(struct cam_ed *device);
318
319 static __inline int
xpt_schedule_devq(struct cam_devq * devq,struct cam_ed * dev)320 xpt_schedule_devq(struct cam_devq *devq, struct cam_ed *dev)
321 {
322 int retval;
323
324 mtx_assert(&devq->send_mtx, MA_OWNED);
325 if ((dev->ccbq.queue.entries > 0) &&
326 (dev->ccbq.dev_openings > 0) &&
327 (dev->ccbq.queue.qfrozen_cnt == 0)) {
328 /*
329 * The priority of a device waiting for controller
330 * resources is that of the highest priority CCB
331 * enqueued.
332 */
333 retval =
334 xpt_schedule_dev(&devq->send_queue,
335 &dev->devq_entry,
336 CAMQ_GET_PRIO(&dev->ccbq.queue));
337 } else {
338 retval = 0;
339 }
340 return (retval);
341 }
342
343 static __inline int
device_is_queued(struct cam_ed * device)344 device_is_queued(struct cam_ed *device)
345 {
346 return (device->devq_entry.index != CAM_UNQUEUED_INDEX);
347 }
348
349 static void
xpt_periph_init()350 xpt_periph_init()
351 {
352 make_dev(&xpt_cdevsw, 0, UID_ROOT, GID_OPERATOR, 0600, "xpt0");
353 }
354
355 static int
xptopen(struct cdev * dev,int flags,int fmt,struct thread * td)356 xptopen(struct cdev *dev, int flags, int fmt, struct thread *td)
357 {
358
359 /*
360 * Only allow read-write access.
361 */
362 if (((flags & FWRITE) == 0) || ((flags & FREAD) == 0))
363 return(EPERM);
364
365 /*
366 * We don't allow nonblocking access.
367 */
368 if ((flags & O_NONBLOCK) != 0) {
369 printf("%s: can't do nonblocking access\n", devtoname(dev));
370 return(ENODEV);
371 }
372
373 return(0);
374 }
375
376 static int
xptclose(struct cdev * dev,int flag,int fmt,struct thread * td)377 xptclose(struct cdev *dev, int flag, int fmt, struct thread *td)
378 {
379
380 return(0);
381 }
382
383 /*
384 * Don't automatically grab the xpt softc lock here even though this is going
385 * through the xpt device. The xpt device is really just a back door for
386 * accessing other devices and SIMs, so the right thing to do is to grab
387 * the appropriate SIM lock once the bus/SIM is located.
388 */
389 static int
xptioctl(struct cdev * dev,u_long cmd,caddr_t addr,int flag,struct thread * td)390 xptioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
391 {
392 int error;
393
394 if ((error = xptdoioctl(dev, cmd, addr, flag, td)) == ENOTTY) {
395 error = cam_compat_ioctl(dev, cmd, addr, flag, td, xptdoioctl);
396 }
397 return (error);
398 }
399
400 static int
xptdoioctl(struct cdev * dev,u_long cmd,caddr_t addr,int flag,struct thread * td)401 xptdoioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
402 {
403 int error;
404
405 error = 0;
406
407 switch(cmd) {
408 /*
409 * For the transport layer CAMIOCOMMAND ioctl, we really only want
410 * to accept CCB types that don't quite make sense to send through a
411 * passthrough driver. XPT_PATH_INQ is an exception to this, as stated
412 * in the CAM spec.
413 */
414 case CAMIOCOMMAND: {
415 union ccb *ccb;
416 union ccb *inccb;
417 struct cam_eb *bus;
418
419 inccb = (union ccb *)addr;
420
421 bus = xpt_find_bus(inccb->ccb_h.path_id);
422 if (bus == NULL)
423 return (EINVAL);
424
425 switch (inccb->ccb_h.func_code) {
426 case XPT_SCAN_BUS:
427 case XPT_RESET_BUS:
428 if (inccb->ccb_h.target_id != CAM_TARGET_WILDCARD ||
429 inccb->ccb_h.target_lun != CAM_LUN_WILDCARD) {
430 xpt_release_bus(bus);
431 return (EINVAL);
432 }
433 break;
434 case XPT_SCAN_TGT:
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 default:
442 break;
443 }
444
445 switch(inccb->ccb_h.func_code) {
446 case XPT_SCAN_BUS:
447 case XPT_RESET_BUS:
448 case XPT_PATH_INQ:
449 case XPT_ENG_INQ:
450 case XPT_SCAN_LUN:
451 case XPT_SCAN_TGT:
452
453 ccb = xpt_alloc_ccb();
454
455 /*
456 * Create a path using the bus, target, and lun the
457 * user passed in.
458 */
459 if (xpt_create_path(&ccb->ccb_h.path, NULL,
460 inccb->ccb_h.path_id,
461 inccb->ccb_h.target_id,
462 inccb->ccb_h.target_lun) !=
463 CAM_REQ_CMP){
464 error = EINVAL;
465 xpt_free_ccb(ccb);
466 break;
467 }
468 /* Ensure all of our fields are correct */
469 xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path,
470 inccb->ccb_h.pinfo.priority);
471 xpt_merge_ccb(ccb, inccb);
472 xpt_path_lock(ccb->ccb_h.path);
473 cam_periph_runccb(ccb, NULL, 0, 0, NULL);
474 xpt_path_unlock(ccb->ccb_h.path);
475 bcopy(ccb, inccb, sizeof(union ccb));
476 xpt_free_path(ccb->ccb_h.path);
477 xpt_free_ccb(ccb);
478 break;
479
480 case XPT_DEBUG: {
481 union ccb ccb;
482
483 /*
484 * This is an immediate CCB, so it's okay to
485 * allocate it on the stack.
486 */
487
488 /*
489 * Create a path using the bus, target, and lun the
490 * user passed in.
491 */
492 if (xpt_create_path(&ccb.ccb_h.path, NULL,
493 inccb->ccb_h.path_id,
494 inccb->ccb_h.target_id,
495 inccb->ccb_h.target_lun) !=
496 CAM_REQ_CMP){
497 error = EINVAL;
498 break;
499 }
500 /* Ensure all of our fields are correct */
501 xpt_setup_ccb(&ccb.ccb_h, ccb.ccb_h.path,
502 inccb->ccb_h.pinfo.priority);
503 xpt_merge_ccb(&ccb, inccb);
504 xpt_action(&ccb);
505 bcopy(&ccb, inccb, sizeof(union ccb));
506 xpt_free_path(ccb.ccb_h.path);
507 break;
508
509 }
510 case XPT_DEV_MATCH: {
511 struct cam_periph_map_info mapinfo;
512 struct cam_path *old_path;
513
514 /*
515 * We can't deal with physical addresses for this
516 * type of transaction.
517 */
518 if ((inccb->ccb_h.flags & CAM_DATA_MASK) !=
519 CAM_DATA_VADDR) {
520 error = EINVAL;
521 break;
522 }
523
524 /*
525 * Save this in case the caller had it set to
526 * something in particular.
527 */
528 old_path = inccb->ccb_h.path;
529
530 /*
531 * We really don't need a path for the matching
532 * code. The path is needed because of the
533 * debugging statements in xpt_action(). They
534 * assume that the CCB has a valid path.
535 */
536 inccb->ccb_h.path = xpt_periph->path;
537
538 bzero(&mapinfo, sizeof(mapinfo));
539
540 /*
541 * Map the pattern and match buffers into kernel
542 * virtual address space.
543 */
544 error = cam_periph_mapmem(inccb, &mapinfo);
545
546 if (error) {
547 inccb->ccb_h.path = old_path;
548 break;
549 }
550
551 /*
552 * This is an immediate CCB, we can send it on directly.
553 */
554 xpt_action(inccb);
555
556 /*
557 * Map the buffers back into user space.
558 */
559 cam_periph_unmapmem(inccb, &mapinfo);
560
561 inccb->ccb_h.path = old_path;
562
563 error = 0;
564 break;
565 }
566 default:
567 error = ENOTSUP;
568 break;
569 }
570 xpt_release_bus(bus);
571 break;
572 }
573 /*
574 * This is the getpassthru ioctl. It takes a XPT_GDEVLIST ccb as input,
575 * with the periphal driver name and unit name filled in. The other
576 * fields don't really matter as input. The passthrough driver name
577 * ("pass"), and unit number are passed back in the ccb. The current
578 * device generation number, and the index into the device peripheral
579 * driver list, and the status are also passed back. Note that
580 * since we do everything in one pass, unlike the XPT_GDEVLIST ccb,
581 * we never return a status of CAM_GDEVLIST_LIST_CHANGED. It is
582 * (or rather should be) impossible for the device peripheral driver
583 * list to change since we look at the whole thing in one pass, and
584 * we do it with lock protection.
585 *
586 */
587 case CAMGETPASSTHRU: {
588 union ccb *ccb;
589 struct cam_periph *periph;
590 struct periph_driver **p_drv;
591 char *name;
592 u_int unit;
593 int base_periph_found;
594
595 ccb = (union ccb *)addr;
596 unit = ccb->cgdl.unit_number;
597 name = ccb->cgdl.periph_name;
598 base_periph_found = 0;
599
600 /*
601 * Sanity check -- make sure we don't get a null peripheral
602 * driver name.
603 */
604 if (*ccb->cgdl.periph_name == '\0') {
605 error = EINVAL;
606 break;
607 }
608
609 /* Keep the list from changing while we traverse it */
610 xpt_lock_buses();
611
612 /* first find our driver in the list of drivers */
613 for (p_drv = periph_drivers; *p_drv != NULL; p_drv++)
614 if (strcmp((*p_drv)->driver_name, name) == 0)
615 break;
616
617 if (*p_drv == NULL) {
618 xpt_unlock_buses();
619 ccb->ccb_h.status = CAM_REQ_CMP_ERR;
620 ccb->cgdl.status = CAM_GDEVLIST_ERROR;
621 *ccb->cgdl.periph_name = '\0';
622 ccb->cgdl.unit_number = 0;
623 error = ENOENT;
624 break;
625 }
626
627 /*
628 * Run through every peripheral instance of this driver
629 * and check to see whether it matches the unit passed
630 * in by the user. If it does, get out of the loops and
631 * find the passthrough driver associated with that
632 * peripheral driver.
633 */
634 for (periph = TAILQ_FIRST(&(*p_drv)->units); periph != NULL;
635 periph = TAILQ_NEXT(periph, unit_links)) {
636
637 if (periph->unit_number == unit)
638 break;
639 }
640 /*
641 * If we found the peripheral driver that the user passed
642 * in, go through all of the peripheral drivers for that
643 * particular device and look for a passthrough driver.
644 */
645 if (periph != NULL) {
646 struct cam_ed *device;
647 int i;
648
649 base_periph_found = 1;
650 device = periph->path->device;
651 for (i = 0, periph = SLIST_FIRST(&device->periphs);
652 periph != NULL;
653 periph = SLIST_NEXT(periph, periph_links), i++) {
654 /*
655 * Check to see whether we have a
656 * passthrough device or not.
657 */
658 if (strcmp(periph->periph_name, "pass") == 0) {
659 /*
660 * Fill in the getdevlist fields.
661 */
662 strcpy(ccb->cgdl.periph_name,
663 periph->periph_name);
664 ccb->cgdl.unit_number =
665 periph->unit_number;
666 if (SLIST_NEXT(periph, periph_links))
667 ccb->cgdl.status =
668 CAM_GDEVLIST_MORE_DEVS;
669 else
670 ccb->cgdl.status =
671 CAM_GDEVLIST_LAST_DEVICE;
672 ccb->cgdl.generation =
673 device->generation;
674 ccb->cgdl.index = i;
675 /*
676 * Fill in some CCB header fields
677 * that the user may want.
678 */
679 ccb->ccb_h.path_id =
680 periph->path->bus->path_id;
681 ccb->ccb_h.target_id =
682 periph->path->target->target_id;
683 ccb->ccb_h.target_lun =
684 periph->path->device->lun_id;
685 ccb->ccb_h.status = CAM_REQ_CMP;
686 break;
687 }
688 }
689 }
690
691 /*
692 * If the periph is null here, one of two things has
693 * happened. The first possibility is that we couldn't
694 * find the unit number of the particular peripheral driver
695 * that the user is asking about. e.g. the user asks for
696 * the passthrough driver for "da11". We find the list of
697 * "da" peripherals all right, but there is no unit 11.
698 * The other possibility is that we went through the list
699 * of peripheral drivers attached to the device structure,
700 * but didn't find one with the name "pass". Either way,
701 * we return ENOENT, since we couldn't find something.
702 */
703 if (periph == NULL) {
704 ccb->ccb_h.status = CAM_REQ_CMP_ERR;
705 ccb->cgdl.status = CAM_GDEVLIST_ERROR;
706 *ccb->cgdl.periph_name = '\0';
707 ccb->cgdl.unit_number = 0;
708 error = ENOENT;
709 /*
710 * It is unfortunate that this is even necessary,
711 * but there are many, many clueless users out there.
712 * If this is true, the user is looking for the
713 * passthrough driver, but doesn't have one in his
714 * kernel.
715 */
716 #if 0
717 if (base_periph_found == 1) {
718 printf("xptioctl: pass driver is not in the "
719 "kernel\n");
720 printf("xptioctl: put \"device pass\" in "
721 "your kernel config file\n");
722 }
723 #endif
724 }
725 xpt_unlock_buses();
726 break;
727 }
728 default:
729 error = ENOTTY;
730 break;
731 }
732
733 return(error);
734 }
735
736 static int
cam_module_event_handler(module_t mod,int what,void * arg)737 cam_module_event_handler(module_t mod, int what, void *arg)
738 {
739 int error;
740
741 switch (what) {
742 case MOD_LOAD:
743 if ((error = xpt_init(NULL)) != 0)
744 return (error);
745 break;
746 case MOD_UNLOAD:
747 return EBUSY;
748 default:
749 return EOPNOTSUPP;
750 }
751
752 return 0;
753 }
754
755 static void
xpt_rescan_done(struct cam_periph * periph,union ccb * done_ccb)756 xpt_rescan_done(struct cam_periph *periph, union ccb *done_ccb)
757 {
758
759 if (done_ccb->ccb_h.ppriv_ptr1 == NULL) {
760 xpt_free_path(done_ccb->ccb_h.path);
761 xpt_free_ccb(done_ccb);
762 } else {
763 done_ccb->ccb_h.cbfcnp = done_ccb->ccb_h.ppriv_ptr1;
764 (*done_ccb->ccb_h.cbfcnp)(periph, done_ccb);
765 }
766 xpt_release_boot();
767 }
768
769 /* thread to handle bus rescans */
770 static void
xpt_scanner_thread(void * dummy)771 xpt_scanner_thread(void *dummy)
772 {
773 union ccb *ccb;
774 struct cam_path path;
775
776 xpt_lock_buses();
777 for (;;) {
778 if (TAILQ_EMPTY(&xsoftc.ccb_scanq))
779 msleep(&xsoftc.ccb_scanq, &xsoftc.xpt_topo_lock, PRIBIO,
780 "-", 0);
781 if ((ccb = (union ccb *)TAILQ_FIRST(&xsoftc.ccb_scanq)) != NULL) {
782 TAILQ_REMOVE(&xsoftc.ccb_scanq, &ccb->ccb_h, sim_links.tqe);
783 xpt_unlock_buses();
784
785 /*
786 * Since lock can be dropped inside and path freed
787 * by completion callback even before return here,
788 * take our own path copy for reference.
789 */
790 xpt_copy_path(&path, ccb->ccb_h.path);
791 xpt_path_lock(&path);
792 xpt_action(ccb);
793 xpt_path_unlock(&path);
794 xpt_release_path(&path);
795
796 xpt_lock_buses();
797 }
798 }
799 }
800
801 void
xpt_rescan(union ccb * ccb)802 xpt_rescan(union ccb *ccb)
803 {
804 struct ccb_hdr *hdr;
805
806 /* Prepare request */
807 if (ccb->ccb_h.path->target->target_id == CAM_TARGET_WILDCARD &&
808 ccb->ccb_h.path->device->lun_id == CAM_LUN_WILDCARD)
809 ccb->ccb_h.func_code = XPT_SCAN_BUS;
810 else if (ccb->ccb_h.path->target->target_id != CAM_TARGET_WILDCARD &&
811 ccb->ccb_h.path->device->lun_id == CAM_LUN_WILDCARD)
812 ccb->ccb_h.func_code = XPT_SCAN_TGT;
813 else if (ccb->ccb_h.path->target->target_id != CAM_TARGET_WILDCARD &&
814 ccb->ccb_h.path->device->lun_id != CAM_LUN_WILDCARD)
815 ccb->ccb_h.func_code = XPT_SCAN_LUN;
816 else {
817 xpt_print(ccb->ccb_h.path, "illegal scan path\n");
818 xpt_free_path(ccb->ccb_h.path);
819 xpt_free_ccb(ccb);
820 return;
821 }
822 ccb->ccb_h.ppriv_ptr1 = ccb->ccb_h.cbfcnp;
823 ccb->ccb_h.cbfcnp = xpt_rescan_done;
824 xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path, CAM_PRIORITY_XPT);
825 /* Don't make duplicate entries for the same paths. */
826 xpt_lock_buses();
827 if (ccb->ccb_h.ppriv_ptr1 == NULL) {
828 TAILQ_FOREACH(hdr, &xsoftc.ccb_scanq, sim_links.tqe) {
829 if (xpt_path_comp(hdr->path, ccb->ccb_h.path) == 0) {
830 wakeup(&xsoftc.ccb_scanq);
831 xpt_unlock_buses();
832 xpt_print(ccb->ccb_h.path, "rescan already queued\n");
833 xpt_free_path(ccb->ccb_h.path);
834 xpt_free_ccb(ccb);
835 return;
836 }
837 }
838 }
839 TAILQ_INSERT_TAIL(&xsoftc.ccb_scanq, &ccb->ccb_h, sim_links.tqe);
840 xsoftc.buses_to_config++;
841 wakeup(&xsoftc.ccb_scanq);
842 xpt_unlock_buses();
843 }
844
845 /* Functions accessed by the peripheral drivers */
846 static int
xpt_init(void * dummy)847 xpt_init(void *dummy)
848 {
849 struct cam_sim *xpt_sim;
850 struct cam_path *path;
851 struct cam_devq *devq;
852 cam_status status;
853 int error, i;
854
855 TAILQ_INIT(&xsoftc.xpt_busses);
856 TAILQ_INIT(&xsoftc.ccb_scanq);
857 STAILQ_INIT(&xsoftc.highpowerq);
858 xsoftc.num_highpower = CAM_MAX_HIGHPOWER;
859
860 mtx_init(&xsoftc.xpt_lock, "XPT lock", NULL, MTX_DEF);
861 mtx_init(&xsoftc.xpt_highpower_lock, "XPT highpower lock", NULL, MTX_DEF);
862 xsoftc.xpt_taskq = taskqueue_create("CAM XPT task", M_WAITOK,
863 taskqueue_thread_enqueue, /*context*/&xsoftc.xpt_taskq);
864
865 #ifdef CAM_BOOT_DELAY
866 /*
867 * Override this value at compile time to assist our users
868 * who don't use loader to boot a kernel.
869 */
870 xsoftc.boot_delay = CAM_BOOT_DELAY;
871 #endif
872 /*
873 * The xpt layer is, itself, the equivelent of a SIM.
874 * Allow 16 ccbs in the ccb pool for it. This should
875 * give decent parallelism when we probe busses and
876 * perform other XPT functions.
877 */
878 devq = cam_simq_alloc(16);
879 xpt_sim = cam_sim_alloc(xptaction,
880 xptpoll,
881 "xpt",
882 /*softc*/NULL,
883 /*unit*/0,
884 /*mtx*/&xsoftc.xpt_lock,
885 /*max_dev_transactions*/0,
886 /*max_tagged_dev_transactions*/0,
887 devq);
888 if (xpt_sim == NULL)
889 return (ENOMEM);
890
891 mtx_lock(&xsoftc.xpt_lock);
892 if ((status = xpt_bus_register(xpt_sim, NULL, 0)) != CAM_SUCCESS) {
893 mtx_unlock(&xsoftc.xpt_lock);
894 printf("xpt_init: xpt_bus_register failed with status %#x,"
895 " failing attach\n", status);
896 return (EINVAL);
897 }
898 mtx_unlock(&xsoftc.xpt_lock);
899
900 /*
901 * Looking at the XPT from the SIM layer, the XPT is
902 * the equivelent of a peripheral driver. Allocate
903 * a peripheral driver entry for us.
904 */
905 if ((status = xpt_create_path(&path, NULL, CAM_XPT_PATH_ID,
906 CAM_TARGET_WILDCARD,
907 CAM_LUN_WILDCARD)) != CAM_REQ_CMP) {
908 printf("xpt_init: xpt_create_path failed with status %#x,"
909 " failing attach\n", status);
910 return (EINVAL);
911 }
912 xpt_path_lock(path);
913 cam_periph_alloc(xptregister, NULL, NULL, NULL, "xpt", CAM_PERIPH_BIO,
914 path, NULL, 0, xpt_sim);
915 xpt_path_unlock(path);
916 xpt_free_path(path);
917
918 if (cam_num_doneqs < 1)
919 cam_num_doneqs = 1 + mp_ncpus / 6;
920 else if (cam_num_doneqs > MAXCPU)
921 cam_num_doneqs = MAXCPU;
922 for (i = 0; i < cam_num_doneqs; i++) {
923 mtx_init(&cam_doneqs[i].cam_doneq_mtx, "CAM doneq", NULL,
924 MTX_DEF);
925 STAILQ_INIT(&cam_doneqs[i].cam_doneq);
926 error = kproc_kthread_add(xpt_done_td, &cam_doneqs[i],
927 &cam_proc, NULL, 0, 0, "cam", "doneq%d", i);
928 if (error != 0) {
929 cam_num_doneqs = i;
930 break;
931 }
932 }
933 if (cam_num_doneqs < 1) {
934 printf("xpt_init: Cannot init completion queues "
935 "- failing attach\n");
936 return (ENOMEM);
937 }
938 /*
939 * Register a callback for when interrupts are enabled.
940 */
941 xsoftc.xpt_config_hook =
942 (struct intr_config_hook *)malloc(sizeof(struct intr_config_hook),
943 M_CAMXPT, M_NOWAIT | M_ZERO);
944 if (xsoftc.xpt_config_hook == NULL) {
945 printf("xpt_init: Cannot malloc config hook "
946 "- failing attach\n");
947 return (ENOMEM);
948 }
949 xsoftc.xpt_config_hook->ich_func = xpt_config;
950 if (config_intrhook_establish(xsoftc.xpt_config_hook) != 0) {
951 free (xsoftc.xpt_config_hook, M_CAMXPT);
952 printf("xpt_init: config_intrhook_establish failed "
953 "- failing attach\n");
954 }
955
956 return (0);
957 }
958
959 static cam_status
xptregister(struct cam_periph * periph,void * arg)960 xptregister(struct cam_periph *periph, void *arg)
961 {
962 struct cam_sim *xpt_sim;
963
964 if (periph == NULL) {
965 printf("xptregister: periph was NULL!!\n");
966 return(CAM_REQ_CMP_ERR);
967 }
968
969 xpt_sim = (struct cam_sim *)arg;
970 xpt_sim->softc = periph;
971 xpt_periph = periph;
972 periph->softc = NULL;
973
974 return(CAM_REQ_CMP);
975 }
976
977 int32_t
xpt_add_periph(struct cam_periph * periph)978 xpt_add_periph(struct cam_periph *periph)
979 {
980 struct cam_ed *device;
981 int32_t status;
982
983 TASK_INIT(&periph->periph_run_task, 0, xpt_run_allocq_task, periph);
984 device = periph->path->device;
985 status = CAM_REQ_CMP;
986 if (device != NULL) {
987 mtx_lock(&device->target->bus->eb_mtx);
988 device->generation++;
989 SLIST_INSERT_HEAD(&device->periphs, periph, periph_links);
990 mtx_unlock(&device->target->bus->eb_mtx);
991 }
992
993 return (status);
994 }
995
996 void
xpt_remove_periph(struct cam_periph * periph)997 xpt_remove_periph(struct cam_periph *periph)
998 {
999 struct cam_ed *device;
1000
1001 device = periph->path->device;
1002 if (device != NULL) {
1003 mtx_lock(&device->target->bus->eb_mtx);
1004 device->generation++;
1005 SLIST_REMOVE(&device->periphs, periph, cam_periph, periph_links);
1006 mtx_unlock(&device->target->bus->eb_mtx);
1007 }
1008 }
1009
1010
1011 void
xpt_announce_periph(struct cam_periph * periph,char * announce_string)1012 xpt_announce_periph(struct cam_periph *periph, char *announce_string)
1013 {
1014 struct cam_path *path = periph->path;
1015
1016 cam_periph_assert(periph, MA_OWNED);
1017 periph->flags |= CAM_PERIPH_ANNOUNCED;
1018
1019 printf("%s%d at %s%d bus %d scbus%d target %d lun %jx\n",
1020 periph->periph_name, periph->unit_number,
1021 path->bus->sim->sim_name,
1022 path->bus->sim->unit_number,
1023 path->bus->sim->bus_id,
1024 path->bus->path_id,
1025 path->target->target_id,
1026 (uintmax_t)path->device->lun_id);
1027 printf("%s%d: ", periph->periph_name, periph->unit_number);
1028 if (path->device->protocol == PROTO_SCSI)
1029 scsi_print_inquiry(&path->device->inq_data);
1030 else if (path->device->protocol == PROTO_ATA ||
1031 path->device->protocol == PROTO_SATAPM)
1032 ata_print_ident(&path->device->ident_data);
1033 else if (path->device->protocol == PROTO_SEMB)
1034 semb_print_ident(
1035 (struct sep_identify_data *)&path->device->ident_data);
1036 else
1037 printf("Unknown protocol device\n");
1038 if (path->device->serial_num_len > 0) {
1039 /* Don't wrap the screen - print only the first 60 chars */
1040 printf("%s%d: Serial Number %.60s\n", periph->periph_name,
1041 periph->unit_number, path->device->serial_num);
1042 }
1043 /* Announce transport details. */
1044 (*(path->bus->xport->announce))(periph);
1045 /* Announce command queueing. */
1046 if (path->device->inq_flags & SID_CmdQue
1047 || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) {
1048 printf("%s%d: Command Queueing enabled\n",
1049 periph->periph_name, periph->unit_number);
1050 }
1051 /* Announce caller's details if they've passed in. */
1052 if (announce_string != NULL)
1053 printf("%s%d: %s\n", periph->periph_name,
1054 periph->unit_number, announce_string);
1055 }
1056
1057 void
xpt_announce_quirks(struct cam_periph * periph,int quirks,char * bit_string)1058 xpt_announce_quirks(struct cam_periph *periph, int quirks, char *bit_string)
1059 {
1060 if (quirks != 0) {
1061 printf("%s%d: quirks=0x%b\n", periph->periph_name,
1062 periph->unit_number, quirks, bit_string);
1063 }
1064 }
1065
1066 void
xpt_denounce_periph(struct cam_periph * periph)1067 xpt_denounce_periph(struct cam_periph *periph)
1068 {
1069 struct cam_path *path = periph->path;
1070
1071 cam_periph_assert(periph, MA_OWNED);
1072 printf("%s%d at %s%d bus %d scbus%d target %d lun %jx\n",
1073 periph->periph_name, periph->unit_number,
1074 path->bus->sim->sim_name,
1075 path->bus->sim->unit_number,
1076 path->bus->sim->bus_id,
1077 path->bus->path_id,
1078 path->target->target_id,
1079 (uintmax_t)path->device->lun_id);
1080 printf("%s%d: ", periph->periph_name, periph->unit_number);
1081 if (path->device->protocol == PROTO_SCSI)
1082 scsi_print_inquiry_short(&path->device->inq_data);
1083 else if (path->device->protocol == PROTO_ATA ||
1084 path->device->protocol == PROTO_SATAPM)
1085 ata_print_ident_short(&path->device->ident_data);
1086 else if (path->device->protocol == PROTO_SEMB)
1087 semb_print_ident_short(
1088 (struct sep_identify_data *)&path->device->ident_data);
1089 else
1090 printf("Unknown protocol device");
1091 if (path->device->serial_num_len > 0)
1092 printf(" s/n %.60s", path->device->serial_num);
1093 printf(" detached\n");
1094 }
1095
1096
1097 int
xpt_getattr(char * buf,size_t len,const char * attr,struct cam_path * path)1098 xpt_getattr(char *buf, size_t len, const char *attr, struct cam_path *path)
1099 {
1100 int ret = -1, l;
1101 struct ccb_dev_advinfo cdai;
1102 struct scsi_vpd_id_descriptor *idd;
1103
1104 xpt_path_assert(path, MA_OWNED);
1105
1106 memset(&cdai, 0, sizeof(cdai));
1107 xpt_setup_ccb(&cdai.ccb_h, path, CAM_PRIORITY_NORMAL);
1108 cdai.ccb_h.func_code = XPT_DEV_ADVINFO;
1109 cdai.bufsiz = len;
1110
1111 if (!strcmp(attr, "GEOM::ident"))
1112 cdai.buftype = CDAI_TYPE_SERIAL_NUM;
1113 else if (!strcmp(attr, "GEOM::physpath"))
1114 cdai.buftype = CDAI_TYPE_PHYS_PATH;
1115 else if (strcmp(attr, "GEOM::lunid") == 0 ||
1116 strcmp(attr, "GEOM::lunname") == 0) {
1117 cdai.buftype = CDAI_TYPE_SCSI_DEVID;
1118 cdai.bufsiz = CAM_SCSI_DEVID_MAXLEN;
1119 } else
1120 goto out;
1121
1122 cdai.buf = malloc(cdai.bufsiz, M_CAMXPT, M_NOWAIT|M_ZERO);
1123 if (cdai.buf == NULL) {
1124 ret = ENOMEM;
1125 goto out;
1126 }
1127 xpt_action((union ccb *)&cdai); /* can only be synchronous */
1128 if ((cdai.ccb_h.status & CAM_DEV_QFRZN) != 0)
1129 cam_release_devq(cdai.ccb_h.path, 0, 0, 0, FALSE);
1130 if (cdai.provsiz == 0)
1131 goto out;
1132 if (cdai.buftype == CDAI_TYPE_SCSI_DEVID) {
1133 if (strcmp(attr, "GEOM::lunid") == 0) {
1134 idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf,
1135 cdai.provsiz, scsi_devid_is_lun_naa);
1136 if (idd == NULL)
1137 idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf,
1138 cdai.provsiz, scsi_devid_is_lun_eui64);
1139 } else
1140 idd = NULL;
1141 if (idd == NULL)
1142 idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf,
1143 cdai.provsiz, scsi_devid_is_lun_t10);
1144 if (idd == NULL)
1145 idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf,
1146 cdai.provsiz, scsi_devid_is_lun_name);
1147 if (idd == NULL)
1148 goto out;
1149 ret = 0;
1150 if ((idd->proto_codeset & SVPD_ID_CODESET_MASK) == SVPD_ID_CODESET_ASCII) {
1151 if (idd->length < len) {
1152 for (l = 0; l < idd->length; l++)
1153 buf[l] = idd->identifier[l] ?
1154 idd->identifier[l] : ' ';
1155 buf[l] = 0;
1156 } else
1157 ret = EFAULT;
1158 } else if ((idd->proto_codeset & SVPD_ID_CODESET_MASK) == SVPD_ID_CODESET_UTF8) {
1159 l = strnlen(idd->identifier, idd->length);
1160 if (l < len) {
1161 bcopy(idd->identifier, buf, l);
1162 buf[l] = 0;
1163 } else
1164 ret = EFAULT;
1165 } else {
1166 if (idd->length * 2 < len) {
1167 for (l = 0; l < idd->length; l++)
1168 sprintf(buf + l * 2, "%02x",
1169 idd->identifier[l]);
1170 } else
1171 ret = EFAULT;
1172 }
1173 } else {
1174 ret = 0;
1175 if (strlcpy(buf, cdai.buf, len) >= len)
1176 ret = EFAULT;
1177 }
1178
1179 out:
1180 if (cdai.buf != NULL)
1181 free(cdai.buf, M_CAMXPT);
1182 return ret;
1183 }
1184
1185 static dev_match_ret
xptbusmatch(struct dev_match_pattern * patterns,u_int num_patterns,struct cam_eb * bus)1186 xptbusmatch(struct dev_match_pattern *patterns, u_int num_patterns,
1187 struct cam_eb *bus)
1188 {
1189 dev_match_ret retval;
1190 int i;
1191
1192 retval = DM_RET_NONE;
1193
1194 /*
1195 * If we aren't given something to match against, that's an error.
1196 */
1197 if (bus == NULL)
1198 return(DM_RET_ERROR);
1199
1200 /*
1201 * If there are no match entries, then this bus matches no
1202 * matter what.
1203 */
1204 if ((patterns == NULL) || (num_patterns == 0))
1205 return(DM_RET_DESCEND | DM_RET_COPY);
1206
1207 for (i = 0; i < num_patterns; i++) {
1208 struct bus_match_pattern *cur_pattern;
1209
1210 /*
1211 * If the pattern in question isn't for a bus node, we
1212 * aren't interested. However, we do indicate to the
1213 * calling routine that we should continue descending the
1214 * tree, since the user wants to match against lower-level
1215 * EDT elements.
1216 */
1217 if (patterns[i].type != DEV_MATCH_BUS) {
1218 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1219 retval |= DM_RET_DESCEND;
1220 continue;
1221 }
1222
1223 cur_pattern = &patterns[i].pattern.bus_pattern;
1224
1225 /*
1226 * If they want to match any bus node, we give them any
1227 * device node.
1228 */
1229 if (cur_pattern->flags == BUS_MATCH_ANY) {
1230 /* set the copy flag */
1231 retval |= DM_RET_COPY;
1232
1233 /*
1234 * If we've already decided on an action, go ahead
1235 * and return.
1236 */
1237 if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE)
1238 return(retval);
1239 }
1240
1241 /*
1242 * Not sure why someone would do this...
1243 */
1244 if (cur_pattern->flags == BUS_MATCH_NONE)
1245 continue;
1246
1247 if (((cur_pattern->flags & BUS_MATCH_PATH) != 0)
1248 && (cur_pattern->path_id != bus->path_id))
1249 continue;
1250
1251 if (((cur_pattern->flags & BUS_MATCH_BUS_ID) != 0)
1252 && (cur_pattern->bus_id != bus->sim->bus_id))
1253 continue;
1254
1255 if (((cur_pattern->flags & BUS_MATCH_UNIT) != 0)
1256 && (cur_pattern->unit_number != bus->sim->unit_number))
1257 continue;
1258
1259 if (((cur_pattern->flags & BUS_MATCH_NAME) != 0)
1260 && (strncmp(cur_pattern->dev_name, bus->sim->sim_name,
1261 DEV_IDLEN) != 0))
1262 continue;
1263
1264 /*
1265 * If we get to this point, the user definitely wants
1266 * information on this bus. So tell the caller to copy the
1267 * data out.
1268 */
1269 retval |= DM_RET_COPY;
1270
1271 /*
1272 * If the return action has been set to descend, then we
1273 * know that we've already seen a non-bus matching
1274 * expression, therefore we need to further descend the tree.
1275 * This won't change by continuing around the loop, so we
1276 * go ahead and return. If we haven't seen a non-bus
1277 * matching expression, we keep going around the loop until
1278 * we exhaust the matching expressions. We'll set the stop
1279 * flag once we fall out of the loop.
1280 */
1281 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND)
1282 return(retval);
1283 }
1284
1285 /*
1286 * If the return action hasn't been set to descend yet, that means
1287 * we haven't seen anything other than bus matching patterns. So
1288 * tell the caller to stop descending the tree -- the user doesn't
1289 * want to match against lower level tree elements.
1290 */
1291 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1292 retval |= DM_RET_STOP;
1293
1294 return(retval);
1295 }
1296
1297 static dev_match_ret
xptdevicematch(struct dev_match_pattern * patterns,u_int num_patterns,struct cam_ed * device)1298 xptdevicematch(struct dev_match_pattern *patterns, u_int num_patterns,
1299 struct cam_ed *device)
1300 {
1301 dev_match_ret retval;
1302 int i;
1303
1304 retval = DM_RET_NONE;
1305
1306 /*
1307 * If we aren't given something to match against, that's an error.
1308 */
1309 if (device == NULL)
1310 return(DM_RET_ERROR);
1311
1312 /*
1313 * If there are no match entries, then this device matches no
1314 * matter what.
1315 */
1316 if ((patterns == NULL) || (num_patterns == 0))
1317 return(DM_RET_DESCEND | DM_RET_COPY);
1318
1319 for (i = 0; i < num_patterns; i++) {
1320 struct device_match_pattern *cur_pattern;
1321 struct scsi_vpd_device_id *device_id_page;
1322
1323 /*
1324 * If the pattern in question isn't for a device node, we
1325 * aren't interested.
1326 */
1327 if (patterns[i].type != DEV_MATCH_DEVICE) {
1328 if ((patterns[i].type == DEV_MATCH_PERIPH)
1329 && ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE))
1330 retval |= DM_RET_DESCEND;
1331 continue;
1332 }
1333
1334 cur_pattern = &patterns[i].pattern.device_pattern;
1335
1336 /* Error out if mutually exclusive options are specified. */
1337 if ((cur_pattern->flags & (DEV_MATCH_INQUIRY|DEV_MATCH_DEVID))
1338 == (DEV_MATCH_INQUIRY|DEV_MATCH_DEVID))
1339 return(DM_RET_ERROR);
1340
1341 /*
1342 * If they want to match any device node, we give them any
1343 * device node.
1344 */
1345 if (cur_pattern->flags == DEV_MATCH_ANY)
1346 goto copy_dev_node;
1347
1348 /*
1349 * Not sure why someone would do this...
1350 */
1351 if (cur_pattern->flags == DEV_MATCH_NONE)
1352 continue;
1353
1354 if (((cur_pattern->flags & DEV_MATCH_PATH) != 0)
1355 && (cur_pattern->path_id != device->target->bus->path_id))
1356 continue;
1357
1358 if (((cur_pattern->flags & DEV_MATCH_TARGET) != 0)
1359 && (cur_pattern->target_id != device->target->target_id))
1360 continue;
1361
1362 if (((cur_pattern->flags & DEV_MATCH_LUN) != 0)
1363 && (cur_pattern->target_lun != device->lun_id))
1364 continue;
1365
1366 if (((cur_pattern->flags & DEV_MATCH_INQUIRY) != 0)
1367 && (cam_quirkmatch((caddr_t)&device->inq_data,
1368 (caddr_t)&cur_pattern->data.inq_pat,
1369 1, sizeof(cur_pattern->data.inq_pat),
1370 scsi_static_inquiry_match) == NULL))
1371 continue;
1372
1373 device_id_page = (struct scsi_vpd_device_id *)device->device_id;
1374 if (((cur_pattern->flags & DEV_MATCH_DEVID) != 0)
1375 && (device->device_id_len < SVPD_DEVICE_ID_HDR_LEN
1376 || scsi_devid_match((uint8_t *)device_id_page->desc_list,
1377 device->device_id_len
1378 - SVPD_DEVICE_ID_HDR_LEN,
1379 cur_pattern->data.devid_pat.id,
1380 cur_pattern->data.devid_pat.id_len) != 0))
1381 continue;
1382
1383 copy_dev_node:
1384 /*
1385 * If we get to this point, the user definitely wants
1386 * information on this device. So tell the caller to copy
1387 * the data out.
1388 */
1389 retval |= DM_RET_COPY;
1390
1391 /*
1392 * If the return action has been set to descend, then we
1393 * know that we've already seen a peripheral matching
1394 * expression, therefore we need to further descend the tree.
1395 * This won't change by continuing around the loop, so we
1396 * go ahead and return. If we haven't seen a peripheral
1397 * matching expression, we keep going around the loop until
1398 * we exhaust the matching expressions. We'll set the stop
1399 * flag once we fall out of the loop.
1400 */
1401 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND)
1402 return(retval);
1403 }
1404
1405 /*
1406 * If the return action hasn't been set to descend yet, that means
1407 * we haven't seen any peripheral matching patterns. So tell the
1408 * caller to stop descending the tree -- the user doesn't want to
1409 * match against lower level tree elements.
1410 */
1411 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1412 retval |= DM_RET_STOP;
1413
1414 return(retval);
1415 }
1416
1417 /*
1418 * Match a single peripheral against any number of match patterns.
1419 */
1420 static dev_match_ret
xptperiphmatch(struct dev_match_pattern * patterns,u_int num_patterns,struct cam_periph * periph)1421 xptperiphmatch(struct dev_match_pattern *patterns, u_int num_patterns,
1422 struct cam_periph *periph)
1423 {
1424 dev_match_ret retval;
1425 int i;
1426
1427 /*
1428 * If we aren't given something to match against, that's an error.
1429 */
1430 if (periph == NULL)
1431 return(DM_RET_ERROR);
1432
1433 /*
1434 * If there are no match entries, then this peripheral matches no
1435 * matter what.
1436 */
1437 if ((patterns == NULL) || (num_patterns == 0))
1438 return(DM_RET_STOP | DM_RET_COPY);
1439
1440 /*
1441 * There aren't any nodes below a peripheral node, so there's no
1442 * reason to descend the tree any further.
1443 */
1444 retval = DM_RET_STOP;
1445
1446 for (i = 0; i < num_patterns; i++) {
1447 struct periph_match_pattern *cur_pattern;
1448
1449 /*
1450 * If the pattern in question isn't for a peripheral, we
1451 * aren't interested.
1452 */
1453 if (patterns[i].type != DEV_MATCH_PERIPH)
1454 continue;
1455
1456 cur_pattern = &patterns[i].pattern.periph_pattern;
1457
1458 /*
1459 * If they want to match on anything, then we will do so.
1460 */
1461 if (cur_pattern->flags == PERIPH_MATCH_ANY) {
1462 /* set the copy flag */
1463 retval |= DM_RET_COPY;
1464
1465 /*
1466 * We've already set the return action to stop,
1467 * since there are no nodes below peripherals in
1468 * the tree.
1469 */
1470 return(retval);
1471 }
1472
1473 /*
1474 * Not sure why someone would do this...
1475 */
1476 if (cur_pattern->flags == PERIPH_MATCH_NONE)
1477 continue;
1478
1479 if (((cur_pattern->flags & PERIPH_MATCH_PATH) != 0)
1480 && (cur_pattern->path_id != periph->path->bus->path_id))
1481 continue;
1482
1483 /*
1484 * For the target and lun id's, we have to make sure the
1485 * target and lun pointers aren't NULL. The xpt peripheral
1486 * has a wildcard target and device.
1487 */
1488 if (((cur_pattern->flags & PERIPH_MATCH_TARGET) != 0)
1489 && ((periph->path->target == NULL)
1490 ||(cur_pattern->target_id != periph->path->target->target_id)))
1491 continue;
1492
1493 if (((cur_pattern->flags & PERIPH_MATCH_LUN) != 0)
1494 && ((periph->path->device == NULL)
1495 || (cur_pattern->target_lun != periph->path->device->lun_id)))
1496 continue;
1497
1498 if (((cur_pattern->flags & PERIPH_MATCH_UNIT) != 0)
1499 && (cur_pattern->unit_number != periph->unit_number))
1500 continue;
1501
1502 if (((cur_pattern->flags & PERIPH_MATCH_NAME) != 0)
1503 && (strncmp(cur_pattern->periph_name, periph->periph_name,
1504 DEV_IDLEN) != 0))
1505 continue;
1506
1507 /*
1508 * If we get to this point, the user definitely wants
1509 * information on this peripheral. So tell the caller to
1510 * copy the data out.
1511 */
1512 retval |= DM_RET_COPY;
1513
1514 /*
1515 * The return action has already been set to stop, since
1516 * peripherals don't have any nodes below them in the EDT.
1517 */
1518 return(retval);
1519 }
1520
1521 /*
1522 * If we get to this point, the peripheral that was passed in
1523 * doesn't match any of the patterns.
1524 */
1525 return(retval);
1526 }
1527
1528 static int
xptedtbusfunc(struct cam_eb * bus,void * arg)1529 xptedtbusfunc(struct cam_eb *bus, void *arg)
1530 {
1531 struct ccb_dev_match *cdm;
1532 struct cam_et *target;
1533 dev_match_ret retval;
1534
1535 cdm = (struct ccb_dev_match *)arg;
1536
1537 /*
1538 * If our position is for something deeper in the tree, that means
1539 * that we've already seen this node. So, we keep going down.
1540 */
1541 if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1542 && (cdm->pos.cookie.bus == bus)
1543 && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1544 && (cdm->pos.cookie.target != NULL))
1545 retval = DM_RET_DESCEND;
1546 else
1547 retval = xptbusmatch(cdm->patterns, cdm->num_patterns, bus);
1548
1549 /*
1550 * If we got an error, bail out of the search.
1551 */
1552 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1553 cdm->status = CAM_DEV_MATCH_ERROR;
1554 return(0);
1555 }
1556
1557 /*
1558 * If the copy flag is set, copy this bus out.
1559 */
1560 if (retval & DM_RET_COPY) {
1561 int spaceleft, j;
1562
1563 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1564 sizeof(struct dev_match_result));
1565
1566 /*
1567 * If we don't have enough space to put in another
1568 * match result, save our position and tell the
1569 * user there are more devices to check.
1570 */
1571 if (spaceleft < sizeof(struct dev_match_result)) {
1572 bzero(&cdm->pos, sizeof(cdm->pos));
1573 cdm->pos.position_type =
1574 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS;
1575
1576 cdm->pos.cookie.bus = bus;
1577 cdm->pos.generations[CAM_BUS_GENERATION]=
1578 xsoftc.bus_generation;
1579 cdm->status = CAM_DEV_MATCH_MORE;
1580 return(0);
1581 }
1582 j = cdm->num_matches;
1583 cdm->num_matches++;
1584 cdm->matches[j].type = DEV_MATCH_BUS;
1585 cdm->matches[j].result.bus_result.path_id = bus->path_id;
1586 cdm->matches[j].result.bus_result.bus_id = bus->sim->bus_id;
1587 cdm->matches[j].result.bus_result.unit_number =
1588 bus->sim->unit_number;
1589 strncpy(cdm->matches[j].result.bus_result.dev_name,
1590 bus->sim->sim_name, DEV_IDLEN);
1591 }
1592
1593 /*
1594 * If the user is only interested in busses, there's no
1595 * reason to descend to the next level in the tree.
1596 */
1597 if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP)
1598 return(1);
1599
1600 /*
1601 * If there is a target generation recorded, check it to
1602 * make sure the target list hasn't changed.
1603 */
1604 mtx_lock(&bus->eb_mtx);
1605 if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1606 && (cdm->pos.cookie.bus == bus)
1607 && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1608 && (cdm->pos.cookie.target != NULL)) {
1609 if ((cdm->pos.generations[CAM_TARGET_GENERATION] !=
1610 bus->generation)) {
1611 mtx_unlock(&bus->eb_mtx);
1612 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1613 return (0);
1614 }
1615 target = (struct cam_et *)cdm->pos.cookie.target;
1616 target->refcount++;
1617 } else
1618 target = NULL;
1619 mtx_unlock(&bus->eb_mtx);
1620
1621 return (xpttargettraverse(bus, target, xptedttargetfunc, arg));
1622 }
1623
1624 static int
xptedttargetfunc(struct cam_et * target,void * arg)1625 xptedttargetfunc(struct cam_et *target, void *arg)
1626 {
1627 struct ccb_dev_match *cdm;
1628 struct cam_eb *bus;
1629 struct cam_ed *device;
1630
1631 cdm = (struct ccb_dev_match *)arg;
1632 bus = target->bus;
1633
1634 /*
1635 * If there is a device list generation recorded, check it to
1636 * make sure the device list hasn't changed.
1637 */
1638 mtx_lock(&bus->eb_mtx);
1639 if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1640 && (cdm->pos.cookie.bus == bus)
1641 && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1642 && (cdm->pos.cookie.target == target)
1643 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1644 && (cdm->pos.cookie.device != NULL)) {
1645 if (cdm->pos.generations[CAM_DEV_GENERATION] !=
1646 target->generation) {
1647 mtx_unlock(&bus->eb_mtx);
1648 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1649 return(0);
1650 }
1651 device = (struct cam_ed *)cdm->pos.cookie.device;
1652 device->refcount++;
1653 } else
1654 device = NULL;
1655 mtx_unlock(&bus->eb_mtx);
1656
1657 return (xptdevicetraverse(target, device, xptedtdevicefunc, arg));
1658 }
1659
1660 static int
xptedtdevicefunc(struct cam_ed * device,void * arg)1661 xptedtdevicefunc(struct cam_ed *device, void *arg)
1662 {
1663 struct cam_eb *bus;
1664 struct cam_periph *periph;
1665 struct ccb_dev_match *cdm;
1666 dev_match_ret retval;
1667
1668 cdm = (struct ccb_dev_match *)arg;
1669 bus = device->target->bus;
1670
1671 /*
1672 * If our position is for something deeper in the tree, that means
1673 * that we've already seen this node. So, we keep going down.
1674 */
1675 if ((cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1676 && (cdm->pos.cookie.device == device)
1677 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
1678 && (cdm->pos.cookie.periph != NULL))
1679 retval = DM_RET_DESCEND;
1680 else
1681 retval = xptdevicematch(cdm->patterns, cdm->num_patterns,
1682 device);
1683
1684 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1685 cdm->status = CAM_DEV_MATCH_ERROR;
1686 return(0);
1687 }
1688
1689 /*
1690 * If the copy flag is set, copy this device out.
1691 */
1692 if (retval & DM_RET_COPY) {
1693 int spaceleft, j;
1694
1695 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1696 sizeof(struct dev_match_result));
1697
1698 /*
1699 * If we don't have enough space to put in another
1700 * match result, save our position and tell the
1701 * user there are more devices to check.
1702 */
1703 if (spaceleft < sizeof(struct dev_match_result)) {
1704 bzero(&cdm->pos, sizeof(cdm->pos));
1705 cdm->pos.position_type =
1706 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS |
1707 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE;
1708
1709 cdm->pos.cookie.bus = device->target->bus;
1710 cdm->pos.generations[CAM_BUS_GENERATION]=
1711 xsoftc.bus_generation;
1712 cdm->pos.cookie.target = device->target;
1713 cdm->pos.generations[CAM_TARGET_GENERATION] =
1714 device->target->bus->generation;
1715 cdm->pos.cookie.device = device;
1716 cdm->pos.generations[CAM_DEV_GENERATION] =
1717 device->target->generation;
1718 cdm->status = CAM_DEV_MATCH_MORE;
1719 return(0);
1720 }
1721 j = cdm->num_matches;
1722 cdm->num_matches++;
1723 cdm->matches[j].type = DEV_MATCH_DEVICE;
1724 cdm->matches[j].result.device_result.path_id =
1725 device->target->bus->path_id;
1726 cdm->matches[j].result.device_result.target_id =
1727 device->target->target_id;
1728 cdm->matches[j].result.device_result.target_lun =
1729 device->lun_id;
1730 cdm->matches[j].result.device_result.protocol =
1731 device->protocol;
1732 bcopy(&device->inq_data,
1733 &cdm->matches[j].result.device_result.inq_data,
1734 sizeof(struct scsi_inquiry_data));
1735 bcopy(&device->ident_data,
1736 &cdm->matches[j].result.device_result.ident_data,
1737 sizeof(struct ata_params));
1738
1739 /* Let the user know whether this device is unconfigured */
1740 if (device->flags & CAM_DEV_UNCONFIGURED)
1741 cdm->matches[j].result.device_result.flags =
1742 DEV_RESULT_UNCONFIGURED;
1743 else
1744 cdm->matches[j].result.device_result.flags =
1745 DEV_RESULT_NOFLAG;
1746 }
1747
1748 /*
1749 * If the user isn't interested in peripherals, don't descend
1750 * the tree any further.
1751 */
1752 if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP)
1753 return(1);
1754
1755 /*
1756 * If there is a peripheral list generation recorded, make sure
1757 * it hasn't changed.
1758 */
1759 xpt_lock_buses();
1760 mtx_lock(&bus->eb_mtx);
1761 if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1762 && (cdm->pos.cookie.bus == bus)
1763 && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1764 && (cdm->pos.cookie.target == device->target)
1765 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1766 && (cdm->pos.cookie.device == device)
1767 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
1768 && (cdm->pos.cookie.periph != NULL)) {
1769 if (cdm->pos.generations[CAM_PERIPH_GENERATION] !=
1770 device->generation) {
1771 mtx_unlock(&bus->eb_mtx);
1772 xpt_unlock_buses();
1773 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1774 return(0);
1775 }
1776 periph = (struct cam_periph *)cdm->pos.cookie.periph;
1777 periph->refcount++;
1778 } else
1779 periph = NULL;
1780 mtx_unlock(&bus->eb_mtx);
1781 xpt_unlock_buses();
1782
1783 return (xptperiphtraverse(device, periph, xptedtperiphfunc, arg));
1784 }
1785
1786 static int
xptedtperiphfunc(struct cam_periph * periph,void * arg)1787 xptedtperiphfunc(struct cam_periph *periph, void *arg)
1788 {
1789 struct ccb_dev_match *cdm;
1790 dev_match_ret retval;
1791
1792 cdm = (struct ccb_dev_match *)arg;
1793
1794 retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph);
1795
1796 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1797 cdm->status = CAM_DEV_MATCH_ERROR;
1798 return(0);
1799 }
1800
1801 /*
1802 * If the copy flag is set, copy this peripheral out.
1803 */
1804 if (retval & DM_RET_COPY) {
1805 int spaceleft, j;
1806
1807 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1808 sizeof(struct dev_match_result));
1809
1810 /*
1811 * If we don't have enough space to put in another
1812 * match result, save our position and tell the
1813 * user there are more devices to check.
1814 */
1815 if (spaceleft < sizeof(struct dev_match_result)) {
1816 bzero(&cdm->pos, sizeof(cdm->pos));
1817 cdm->pos.position_type =
1818 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS |
1819 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE |
1820 CAM_DEV_POS_PERIPH;
1821
1822 cdm->pos.cookie.bus = periph->path->bus;
1823 cdm->pos.generations[CAM_BUS_GENERATION]=
1824 xsoftc.bus_generation;
1825 cdm->pos.cookie.target = periph->path->target;
1826 cdm->pos.generations[CAM_TARGET_GENERATION] =
1827 periph->path->bus->generation;
1828 cdm->pos.cookie.device = periph->path->device;
1829 cdm->pos.generations[CAM_DEV_GENERATION] =
1830 periph->path->target->generation;
1831 cdm->pos.cookie.periph = periph;
1832 cdm->pos.generations[CAM_PERIPH_GENERATION] =
1833 periph->path->device->generation;
1834 cdm->status = CAM_DEV_MATCH_MORE;
1835 return(0);
1836 }
1837
1838 j = cdm->num_matches;
1839 cdm->num_matches++;
1840 cdm->matches[j].type = DEV_MATCH_PERIPH;
1841 cdm->matches[j].result.periph_result.path_id =
1842 periph->path->bus->path_id;
1843 cdm->matches[j].result.periph_result.target_id =
1844 periph->path->target->target_id;
1845 cdm->matches[j].result.periph_result.target_lun =
1846 periph->path->device->lun_id;
1847 cdm->matches[j].result.periph_result.unit_number =
1848 periph->unit_number;
1849 strncpy(cdm->matches[j].result.periph_result.periph_name,
1850 periph->periph_name, DEV_IDLEN);
1851 }
1852
1853 return(1);
1854 }
1855
1856 static int
xptedtmatch(struct ccb_dev_match * cdm)1857 xptedtmatch(struct ccb_dev_match *cdm)
1858 {
1859 struct cam_eb *bus;
1860 int ret;
1861
1862 cdm->num_matches = 0;
1863
1864 /*
1865 * Check the bus list generation. If it has changed, the user
1866 * needs to reset everything and start over.
1867 */
1868 xpt_lock_buses();
1869 if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1870 && (cdm->pos.cookie.bus != NULL)) {
1871 if (cdm->pos.generations[CAM_BUS_GENERATION] !=
1872 xsoftc.bus_generation) {
1873 xpt_unlock_buses();
1874 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1875 return(0);
1876 }
1877 bus = (struct cam_eb *)cdm->pos.cookie.bus;
1878 bus->refcount++;
1879 } else
1880 bus = NULL;
1881 xpt_unlock_buses();
1882
1883 ret = xptbustraverse(bus, xptedtbusfunc, cdm);
1884
1885 /*
1886 * If we get back 0, that means that we had to stop before fully
1887 * traversing the EDT. It also means that one of the subroutines
1888 * has set the status field to the proper value. If we get back 1,
1889 * we've fully traversed the EDT and copied out any matching entries.
1890 */
1891 if (ret == 1)
1892 cdm->status = CAM_DEV_MATCH_LAST;
1893
1894 return(ret);
1895 }
1896
1897 static int
xptplistpdrvfunc(struct periph_driver ** pdrv,void * arg)1898 xptplistpdrvfunc(struct periph_driver **pdrv, void *arg)
1899 {
1900 struct cam_periph *periph;
1901 struct ccb_dev_match *cdm;
1902
1903 cdm = (struct ccb_dev_match *)arg;
1904
1905 xpt_lock_buses();
1906 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
1907 && (cdm->pos.cookie.pdrv == pdrv)
1908 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
1909 && (cdm->pos.cookie.periph != NULL)) {
1910 if (cdm->pos.generations[CAM_PERIPH_GENERATION] !=
1911 (*pdrv)->generation) {
1912 xpt_unlock_buses();
1913 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1914 return(0);
1915 }
1916 periph = (struct cam_periph *)cdm->pos.cookie.periph;
1917 periph->refcount++;
1918 } else
1919 periph = NULL;
1920 xpt_unlock_buses();
1921
1922 return (xptpdperiphtraverse(pdrv, periph, xptplistperiphfunc, arg));
1923 }
1924
1925 static int
xptplistperiphfunc(struct cam_periph * periph,void * arg)1926 xptplistperiphfunc(struct cam_periph *periph, void *arg)
1927 {
1928 struct ccb_dev_match *cdm;
1929 dev_match_ret retval;
1930
1931 cdm = (struct ccb_dev_match *)arg;
1932
1933 retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph);
1934
1935 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1936 cdm->status = CAM_DEV_MATCH_ERROR;
1937 return(0);
1938 }
1939
1940 /*
1941 * If the copy flag is set, copy this peripheral out.
1942 */
1943 if (retval & DM_RET_COPY) {
1944 int spaceleft, j;
1945
1946 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1947 sizeof(struct dev_match_result));
1948
1949 /*
1950 * If we don't have enough space to put in another
1951 * match result, save our position and tell the
1952 * user there are more devices to check.
1953 */
1954 if (spaceleft < sizeof(struct dev_match_result)) {
1955 struct periph_driver **pdrv;
1956
1957 pdrv = NULL;
1958 bzero(&cdm->pos, sizeof(cdm->pos));
1959 cdm->pos.position_type =
1960 CAM_DEV_POS_PDRV | CAM_DEV_POS_PDPTR |
1961 CAM_DEV_POS_PERIPH;
1962
1963 /*
1964 * This may look a bit non-sensical, but it is
1965 * actually quite logical. There are very few
1966 * peripheral drivers, and bloating every peripheral
1967 * structure with a pointer back to its parent
1968 * peripheral driver linker set entry would cost
1969 * more in the long run than doing this quick lookup.
1970 */
1971 for (pdrv = periph_drivers; *pdrv != NULL; pdrv++) {
1972 if (strcmp((*pdrv)->driver_name,
1973 periph->periph_name) == 0)
1974 break;
1975 }
1976
1977 if (*pdrv == NULL) {
1978 cdm->status = CAM_DEV_MATCH_ERROR;
1979 return(0);
1980 }
1981
1982 cdm->pos.cookie.pdrv = pdrv;
1983 /*
1984 * The periph generation slot does double duty, as
1985 * does the periph pointer slot. They are used for
1986 * both edt and pdrv lookups and positioning.
1987 */
1988 cdm->pos.cookie.periph = periph;
1989 cdm->pos.generations[CAM_PERIPH_GENERATION] =
1990 (*pdrv)->generation;
1991 cdm->status = CAM_DEV_MATCH_MORE;
1992 return(0);
1993 }
1994
1995 j = cdm->num_matches;
1996 cdm->num_matches++;
1997 cdm->matches[j].type = DEV_MATCH_PERIPH;
1998 cdm->matches[j].result.periph_result.path_id =
1999 periph->path->bus->path_id;
2000
2001 /*
2002 * The transport layer peripheral doesn't have a target or
2003 * lun.
2004 */
2005 if (periph->path->target)
2006 cdm->matches[j].result.periph_result.target_id =
2007 periph->path->target->target_id;
2008 else
2009 cdm->matches[j].result.periph_result.target_id =
2010 CAM_TARGET_WILDCARD;
2011
2012 if (periph->path->device)
2013 cdm->matches[j].result.periph_result.target_lun =
2014 periph->path->device->lun_id;
2015 else
2016 cdm->matches[j].result.periph_result.target_lun =
2017 CAM_LUN_WILDCARD;
2018
2019 cdm->matches[j].result.periph_result.unit_number =
2020 periph->unit_number;
2021 strncpy(cdm->matches[j].result.periph_result.periph_name,
2022 periph->periph_name, DEV_IDLEN);
2023 }
2024
2025 return(1);
2026 }
2027
2028 static int
xptperiphlistmatch(struct ccb_dev_match * cdm)2029 xptperiphlistmatch(struct ccb_dev_match *cdm)
2030 {
2031 int ret;
2032
2033 cdm->num_matches = 0;
2034
2035 /*
2036 * At this point in the edt traversal function, we check the bus
2037 * list generation to make sure that no busses have been added or
2038 * removed since the user last sent a XPT_DEV_MATCH ccb through.
2039 * For the peripheral driver list traversal function, however, we
2040 * don't have to worry about new peripheral driver types coming or
2041 * going; they're in a linker set, and therefore can't change
2042 * without a recompile.
2043 */
2044
2045 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
2046 && (cdm->pos.cookie.pdrv != NULL))
2047 ret = xptpdrvtraverse(
2048 (struct periph_driver **)cdm->pos.cookie.pdrv,
2049 xptplistpdrvfunc, cdm);
2050 else
2051 ret = xptpdrvtraverse(NULL, xptplistpdrvfunc, cdm);
2052
2053 /*
2054 * If we get back 0, that means that we had to stop before fully
2055 * traversing the peripheral driver tree. It also means that one of
2056 * the subroutines has set the status field to the proper value. If
2057 * we get back 1, we've fully traversed the EDT and copied out any
2058 * matching entries.
2059 */
2060 if (ret == 1)
2061 cdm->status = CAM_DEV_MATCH_LAST;
2062
2063 return(ret);
2064 }
2065
2066 static int
xptbustraverse(struct cam_eb * start_bus,xpt_busfunc_t * tr_func,void * arg)2067 xptbustraverse(struct cam_eb *start_bus, xpt_busfunc_t *tr_func, void *arg)
2068 {
2069 struct cam_eb *bus, *next_bus;
2070 int retval;
2071
2072 retval = 1;
2073 if (start_bus)
2074 bus = start_bus;
2075 else {
2076 xpt_lock_buses();
2077 bus = TAILQ_FIRST(&xsoftc.xpt_busses);
2078 if (bus == NULL) {
2079 xpt_unlock_buses();
2080 return (retval);
2081 }
2082 bus->refcount++;
2083 xpt_unlock_buses();
2084 }
2085 for (; bus != NULL; bus = next_bus) {
2086 retval = tr_func(bus, arg);
2087 if (retval == 0) {
2088 xpt_release_bus(bus);
2089 break;
2090 }
2091 xpt_lock_buses();
2092 next_bus = TAILQ_NEXT(bus, links);
2093 if (next_bus)
2094 next_bus->refcount++;
2095 xpt_unlock_buses();
2096 xpt_release_bus(bus);
2097 }
2098 return(retval);
2099 }
2100
2101 static int
xpttargettraverse(struct cam_eb * bus,struct cam_et * start_target,xpt_targetfunc_t * tr_func,void * arg)2102 xpttargettraverse(struct cam_eb *bus, struct cam_et *start_target,
2103 xpt_targetfunc_t *tr_func, void *arg)
2104 {
2105 struct cam_et *target, *next_target;
2106 int retval;
2107
2108 retval = 1;
2109 if (start_target)
2110 target = start_target;
2111 else {
2112 mtx_lock(&bus->eb_mtx);
2113 target = TAILQ_FIRST(&bus->et_entries);
2114 if (target == NULL) {
2115 mtx_unlock(&bus->eb_mtx);
2116 return (retval);
2117 }
2118 target->refcount++;
2119 mtx_unlock(&bus->eb_mtx);
2120 }
2121 for (; target != NULL; target = next_target) {
2122 retval = tr_func(target, arg);
2123 if (retval == 0) {
2124 xpt_release_target(target);
2125 break;
2126 }
2127 mtx_lock(&bus->eb_mtx);
2128 next_target = TAILQ_NEXT(target, links);
2129 if (next_target)
2130 next_target->refcount++;
2131 mtx_unlock(&bus->eb_mtx);
2132 xpt_release_target(target);
2133 }
2134 return(retval);
2135 }
2136
2137 static int
xptdevicetraverse(struct cam_et * target,struct cam_ed * start_device,xpt_devicefunc_t * tr_func,void * arg)2138 xptdevicetraverse(struct cam_et *target, struct cam_ed *start_device,
2139 xpt_devicefunc_t *tr_func, void *arg)
2140 {
2141 struct cam_eb *bus;
2142 struct cam_ed *device, *next_device;
2143 int retval;
2144
2145 retval = 1;
2146 bus = target->bus;
2147 if (start_device)
2148 device = start_device;
2149 else {
2150 mtx_lock(&bus->eb_mtx);
2151 device = TAILQ_FIRST(&target->ed_entries);
2152 if (device == NULL) {
2153 mtx_unlock(&bus->eb_mtx);
2154 return (retval);
2155 }
2156 device->refcount++;
2157 mtx_unlock(&bus->eb_mtx);
2158 }
2159 for (; device != NULL; device = next_device) {
2160 mtx_lock(&device->device_mtx);
2161 retval = tr_func(device, arg);
2162 mtx_unlock(&device->device_mtx);
2163 if (retval == 0) {
2164 xpt_release_device(device);
2165 break;
2166 }
2167 mtx_lock(&bus->eb_mtx);
2168 next_device = TAILQ_NEXT(device, links);
2169 if (next_device)
2170 next_device->refcount++;
2171 mtx_unlock(&bus->eb_mtx);
2172 xpt_release_device(device);
2173 }
2174 return(retval);
2175 }
2176
2177 static int
xptperiphtraverse(struct cam_ed * device,struct cam_periph * start_periph,xpt_periphfunc_t * tr_func,void * arg)2178 xptperiphtraverse(struct cam_ed *device, struct cam_periph *start_periph,
2179 xpt_periphfunc_t *tr_func, void *arg)
2180 {
2181 struct cam_eb *bus;
2182 struct cam_periph *periph, *next_periph;
2183 int retval;
2184
2185 retval = 1;
2186
2187 bus = device->target->bus;
2188 if (start_periph)
2189 periph = start_periph;
2190 else {
2191 xpt_lock_buses();
2192 mtx_lock(&bus->eb_mtx);
2193 periph = SLIST_FIRST(&device->periphs);
2194 while (periph != NULL && (periph->flags & CAM_PERIPH_FREE) != 0)
2195 periph = SLIST_NEXT(periph, periph_links);
2196 if (periph == NULL) {
2197 mtx_unlock(&bus->eb_mtx);
2198 xpt_unlock_buses();
2199 return (retval);
2200 }
2201 periph->refcount++;
2202 mtx_unlock(&bus->eb_mtx);
2203 xpt_unlock_buses();
2204 }
2205 for (; periph != NULL; periph = next_periph) {
2206 retval = tr_func(periph, arg);
2207 if (retval == 0) {
2208 cam_periph_release_locked(periph);
2209 break;
2210 }
2211 xpt_lock_buses();
2212 mtx_lock(&bus->eb_mtx);
2213 next_periph = SLIST_NEXT(periph, periph_links);
2214 while (next_periph != NULL &&
2215 (next_periph->flags & CAM_PERIPH_FREE) != 0)
2216 next_periph = SLIST_NEXT(next_periph, periph_links);
2217 if (next_periph)
2218 next_periph->refcount++;
2219 mtx_unlock(&bus->eb_mtx);
2220 xpt_unlock_buses();
2221 cam_periph_release_locked(periph);
2222 }
2223 return(retval);
2224 }
2225
2226 static int
xptpdrvtraverse(struct periph_driver ** start_pdrv,xpt_pdrvfunc_t * tr_func,void * arg)2227 xptpdrvtraverse(struct periph_driver **start_pdrv,
2228 xpt_pdrvfunc_t *tr_func, void *arg)
2229 {
2230 struct periph_driver **pdrv;
2231 int retval;
2232
2233 retval = 1;
2234
2235 /*
2236 * We don't traverse the peripheral driver list like we do the
2237 * other lists, because it is a linker set, and therefore cannot be
2238 * changed during runtime. If the peripheral driver list is ever
2239 * re-done to be something other than a linker set (i.e. it can
2240 * change while the system is running), the list traversal should
2241 * be modified to work like the other traversal functions.
2242 */
2243 for (pdrv = (start_pdrv ? start_pdrv : periph_drivers);
2244 *pdrv != NULL; pdrv++) {
2245 retval = tr_func(pdrv, arg);
2246
2247 if (retval == 0)
2248 return(retval);
2249 }
2250
2251 return(retval);
2252 }
2253
2254 static int
xptpdperiphtraverse(struct periph_driver ** pdrv,struct cam_periph * start_periph,xpt_periphfunc_t * tr_func,void * arg)2255 xptpdperiphtraverse(struct periph_driver **pdrv,
2256 struct cam_periph *start_periph,
2257 xpt_periphfunc_t *tr_func, void *arg)
2258 {
2259 struct cam_periph *periph, *next_periph;
2260 int retval;
2261
2262 retval = 1;
2263
2264 if (start_periph)
2265 periph = start_periph;
2266 else {
2267 xpt_lock_buses();
2268 periph = TAILQ_FIRST(&(*pdrv)->units);
2269 while (periph != NULL && (periph->flags & CAM_PERIPH_FREE) != 0)
2270 periph = TAILQ_NEXT(periph, unit_links);
2271 if (periph == NULL) {
2272 xpt_unlock_buses();
2273 return (retval);
2274 }
2275 periph->refcount++;
2276 xpt_unlock_buses();
2277 }
2278 for (; periph != NULL; periph = next_periph) {
2279 cam_periph_lock(periph);
2280 retval = tr_func(periph, arg);
2281 cam_periph_unlock(periph);
2282 if (retval == 0) {
2283 cam_periph_release(periph);
2284 break;
2285 }
2286 xpt_lock_buses();
2287 next_periph = TAILQ_NEXT(periph, unit_links);
2288 while (next_periph != NULL &&
2289 (next_periph->flags & CAM_PERIPH_FREE) != 0)
2290 next_periph = TAILQ_NEXT(next_periph, unit_links);
2291 if (next_periph)
2292 next_periph->refcount++;
2293 xpt_unlock_buses();
2294 cam_periph_release(periph);
2295 }
2296 return(retval);
2297 }
2298
2299 static int
xptdefbusfunc(struct cam_eb * bus,void * arg)2300 xptdefbusfunc(struct cam_eb *bus, void *arg)
2301 {
2302 struct xpt_traverse_config *tr_config;
2303
2304 tr_config = (struct xpt_traverse_config *)arg;
2305
2306 if (tr_config->depth == XPT_DEPTH_BUS) {
2307 xpt_busfunc_t *tr_func;
2308
2309 tr_func = (xpt_busfunc_t *)tr_config->tr_func;
2310
2311 return(tr_func(bus, tr_config->tr_arg));
2312 } else
2313 return(xpttargettraverse(bus, NULL, xptdeftargetfunc, arg));
2314 }
2315
2316 static int
xptdeftargetfunc(struct cam_et * target,void * arg)2317 xptdeftargetfunc(struct cam_et *target, void *arg)
2318 {
2319 struct xpt_traverse_config *tr_config;
2320
2321 tr_config = (struct xpt_traverse_config *)arg;
2322
2323 if (tr_config->depth == XPT_DEPTH_TARGET) {
2324 xpt_targetfunc_t *tr_func;
2325
2326 tr_func = (xpt_targetfunc_t *)tr_config->tr_func;
2327
2328 return(tr_func(target, tr_config->tr_arg));
2329 } else
2330 return(xptdevicetraverse(target, NULL, xptdefdevicefunc, arg));
2331 }
2332
2333 static int
xptdefdevicefunc(struct cam_ed * device,void * arg)2334 xptdefdevicefunc(struct cam_ed *device, void *arg)
2335 {
2336 struct xpt_traverse_config *tr_config;
2337
2338 tr_config = (struct xpt_traverse_config *)arg;
2339
2340 if (tr_config->depth == XPT_DEPTH_DEVICE) {
2341 xpt_devicefunc_t *tr_func;
2342
2343 tr_func = (xpt_devicefunc_t *)tr_config->tr_func;
2344
2345 return(tr_func(device, tr_config->tr_arg));
2346 } else
2347 return(xptperiphtraverse(device, NULL, xptdefperiphfunc, arg));
2348 }
2349
2350 static int
xptdefperiphfunc(struct cam_periph * periph,void * arg)2351 xptdefperiphfunc(struct cam_periph *periph, void *arg)
2352 {
2353 struct xpt_traverse_config *tr_config;
2354 xpt_periphfunc_t *tr_func;
2355
2356 tr_config = (struct xpt_traverse_config *)arg;
2357
2358 tr_func = (xpt_periphfunc_t *)tr_config->tr_func;
2359
2360 /*
2361 * Unlike the other default functions, we don't check for depth
2362 * here. The peripheral driver level is the last level in the EDT,
2363 * so if we're here, we should execute the function in question.
2364 */
2365 return(tr_func(periph, tr_config->tr_arg));
2366 }
2367
2368 /*
2369 * Execute the given function for every bus in the EDT.
2370 */
2371 static int
xpt_for_all_busses(xpt_busfunc_t * tr_func,void * arg)2372 xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg)
2373 {
2374 struct xpt_traverse_config tr_config;
2375
2376 tr_config.depth = XPT_DEPTH_BUS;
2377 tr_config.tr_func = tr_func;
2378 tr_config.tr_arg = arg;
2379
2380 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2381 }
2382
2383 /*
2384 * Execute the given function for every device in the EDT.
2385 */
2386 static int
xpt_for_all_devices(xpt_devicefunc_t * tr_func,void * arg)2387 xpt_for_all_devices(xpt_devicefunc_t *tr_func, void *arg)
2388 {
2389 struct xpt_traverse_config tr_config;
2390
2391 tr_config.depth = XPT_DEPTH_DEVICE;
2392 tr_config.tr_func = tr_func;
2393 tr_config.tr_arg = arg;
2394
2395 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2396 }
2397
2398 static int
xptsetasyncfunc(struct cam_ed * device,void * arg)2399 xptsetasyncfunc(struct cam_ed *device, void *arg)
2400 {
2401 struct cam_path path;
2402 struct ccb_getdev cgd;
2403 struct ccb_setasync *csa = (struct ccb_setasync *)arg;
2404
2405 /*
2406 * Don't report unconfigured devices (Wildcard devs,
2407 * devices only for target mode, device instances
2408 * that have been invalidated but are waiting for
2409 * their last reference count to be released).
2410 */
2411 if ((device->flags & CAM_DEV_UNCONFIGURED) != 0)
2412 return (1);
2413
2414 xpt_compile_path(&path,
2415 NULL,
2416 device->target->bus->path_id,
2417 device->target->target_id,
2418 device->lun_id);
2419 xpt_setup_ccb(&cgd.ccb_h, &path, CAM_PRIORITY_NORMAL);
2420 cgd.ccb_h.func_code = XPT_GDEV_TYPE;
2421 xpt_action((union ccb *)&cgd);
2422 csa->callback(csa->callback_arg,
2423 AC_FOUND_DEVICE,
2424 &path, &cgd);
2425 xpt_release_path(&path);
2426
2427 return(1);
2428 }
2429
2430 static int
xptsetasyncbusfunc(struct cam_eb * bus,void * arg)2431 xptsetasyncbusfunc(struct cam_eb *bus, void *arg)
2432 {
2433 struct cam_path path;
2434 struct ccb_pathinq cpi;
2435 struct ccb_setasync *csa = (struct ccb_setasync *)arg;
2436
2437 xpt_compile_path(&path, /*periph*/NULL,
2438 bus->path_id,
2439 CAM_TARGET_WILDCARD,
2440 CAM_LUN_WILDCARD);
2441 xpt_path_lock(&path);
2442 xpt_setup_ccb(&cpi.ccb_h, &path, CAM_PRIORITY_NORMAL);
2443 cpi.ccb_h.func_code = XPT_PATH_INQ;
2444 xpt_action((union ccb *)&cpi);
2445 csa->callback(csa->callback_arg,
2446 AC_PATH_REGISTERED,
2447 &path, &cpi);
2448 xpt_path_unlock(&path);
2449 xpt_release_path(&path);
2450
2451 return(1);
2452 }
2453
2454 void
xpt_action(union ccb * start_ccb)2455 xpt_action(union ccb *start_ccb)
2456 {
2457
2458 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_action\n"));
2459
2460 start_ccb->ccb_h.status = CAM_REQ_INPROG;
2461 (*(start_ccb->ccb_h.path->bus->xport->action))(start_ccb);
2462 }
2463
2464 void
xpt_action_default(union ccb * start_ccb)2465 xpt_action_default(union ccb *start_ccb)
2466 {
2467 struct cam_path *path;
2468 struct cam_sim *sim;
2469 int lock;
2470
2471 path = start_ccb->ccb_h.path;
2472 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_action_default\n"));
2473
2474 switch (start_ccb->ccb_h.func_code) {
2475 case XPT_SCSI_IO:
2476 {
2477 struct cam_ed *device;
2478
2479 /*
2480 * For the sake of compatibility with SCSI-1
2481 * devices that may not understand the identify
2482 * message, we include lun information in the
2483 * second byte of all commands. SCSI-1 specifies
2484 * that luns are a 3 bit value and reserves only 3
2485 * bits for lun information in the CDB. Later
2486 * revisions of the SCSI spec allow for more than 8
2487 * luns, but have deprecated lun information in the
2488 * CDB. So, if the lun won't fit, we must omit.
2489 *
2490 * Also be aware that during initial probing for devices,
2491 * the inquiry information is unknown but initialized to 0.
2492 * This means that this code will be exercised while probing
2493 * devices with an ANSI revision greater than 2.
2494 */
2495 device = path->device;
2496 if (device->protocol_version <= SCSI_REV_2
2497 && start_ccb->ccb_h.target_lun < 8
2498 && (start_ccb->ccb_h.flags & CAM_CDB_POINTER) == 0) {
2499
2500 start_ccb->csio.cdb_io.cdb_bytes[1] |=
2501 start_ccb->ccb_h.target_lun << 5;
2502 }
2503 start_ccb->csio.scsi_status = SCSI_STATUS_OK;
2504 }
2505 /* FALLTHROUGH */
2506 case XPT_TARGET_IO:
2507 case XPT_CONT_TARGET_IO:
2508 start_ccb->csio.sense_resid = 0;
2509 start_ccb->csio.resid = 0;
2510 /* FALLTHROUGH */
2511 case XPT_ATA_IO:
2512 if (start_ccb->ccb_h.func_code == XPT_ATA_IO)
2513 start_ccb->ataio.resid = 0;
2514 /* FALLTHROUGH */
2515 case XPT_RESET_DEV:
2516 case XPT_ENG_EXEC:
2517 case XPT_SMP_IO:
2518 {
2519 struct cam_devq *devq;
2520
2521 devq = path->bus->sim->devq;
2522 mtx_lock(&devq->send_mtx);
2523 cam_ccbq_insert_ccb(&path->device->ccbq, start_ccb);
2524 if (xpt_schedule_devq(devq, path->device) != 0)
2525 xpt_run_devq(devq);
2526 mtx_unlock(&devq->send_mtx);
2527 break;
2528 }
2529 case XPT_CALC_GEOMETRY:
2530 /* Filter out garbage */
2531 if (start_ccb->ccg.block_size == 0
2532 || start_ccb->ccg.volume_size == 0) {
2533 start_ccb->ccg.cylinders = 0;
2534 start_ccb->ccg.heads = 0;
2535 start_ccb->ccg.secs_per_track = 0;
2536 start_ccb->ccb_h.status = CAM_REQ_CMP;
2537 break;
2538 }
2539 #if defined(PC98) || defined(__sparc64__)
2540 /*
2541 * In a PC-98 system, geometry translation depens on
2542 * the "real" device geometry obtained from mode page 4.
2543 * SCSI geometry translation is performed in the
2544 * initialization routine of the SCSI BIOS and the result
2545 * stored in host memory. If the translation is available
2546 * in host memory, use it. If not, rely on the default
2547 * translation the device driver performs.
2548 * For sparc64, we may need adjust the geometry of large
2549 * disks in order to fit the limitations of the 16-bit
2550 * fields of the VTOC8 disk label.
2551 */
2552 if (scsi_da_bios_params(&start_ccb->ccg) != 0) {
2553 start_ccb->ccb_h.status = CAM_REQ_CMP;
2554 break;
2555 }
2556 #endif
2557 goto call_sim;
2558 case XPT_ABORT:
2559 {
2560 union ccb* abort_ccb;
2561
2562 abort_ccb = start_ccb->cab.abort_ccb;
2563 if (XPT_FC_IS_DEV_QUEUED(abort_ccb)) {
2564
2565 if (abort_ccb->ccb_h.pinfo.index >= 0) {
2566 struct cam_ccbq *ccbq;
2567 struct cam_ed *device;
2568
2569 device = abort_ccb->ccb_h.path->device;
2570 ccbq = &device->ccbq;
2571 cam_ccbq_remove_ccb(ccbq, abort_ccb);
2572 abort_ccb->ccb_h.status =
2573 CAM_REQ_ABORTED|CAM_DEV_QFRZN;
2574 xpt_freeze_devq(abort_ccb->ccb_h.path, 1);
2575 xpt_done(abort_ccb);
2576 start_ccb->ccb_h.status = CAM_REQ_CMP;
2577 break;
2578 }
2579 if (abort_ccb->ccb_h.pinfo.index == CAM_UNQUEUED_INDEX
2580 && (abort_ccb->ccb_h.status & CAM_SIM_QUEUED) == 0) {
2581 /*
2582 * We've caught this ccb en route to
2583 * the SIM. Flag it for abort and the
2584 * SIM will do so just before starting
2585 * real work on the CCB.
2586 */
2587 abort_ccb->ccb_h.status =
2588 CAM_REQ_ABORTED|CAM_DEV_QFRZN;
2589 xpt_freeze_devq(abort_ccb->ccb_h.path, 1);
2590 start_ccb->ccb_h.status = CAM_REQ_CMP;
2591 break;
2592 }
2593 }
2594 if (XPT_FC_IS_QUEUED(abort_ccb)
2595 && (abort_ccb->ccb_h.pinfo.index == CAM_DONEQ_INDEX)) {
2596 /*
2597 * It's already completed but waiting
2598 * for our SWI to get to it.
2599 */
2600 start_ccb->ccb_h.status = CAM_UA_ABORT;
2601 break;
2602 }
2603 /*
2604 * If we weren't able to take care of the abort request
2605 * in the XPT, pass the request down to the SIM for processing.
2606 */
2607 }
2608 /* FALLTHROUGH */
2609 case XPT_ACCEPT_TARGET_IO:
2610 case XPT_EN_LUN:
2611 case XPT_IMMED_NOTIFY:
2612 case XPT_NOTIFY_ACK:
2613 case XPT_RESET_BUS:
2614 case XPT_IMMEDIATE_NOTIFY:
2615 case XPT_NOTIFY_ACKNOWLEDGE:
2616 case XPT_GET_SIM_KNOB:
2617 case XPT_SET_SIM_KNOB:
2618 case XPT_GET_TRAN_SETTINGS:
2619 case XPT_SET_TRAN_SETTINGS:
2620 case XPT_PATH_INQ:
2621 call_sim:
2622 sim = path->bus->sim;
2623 lock = (mtx_owned(sim->mtx) == 0);
2624 if (lock)
2625 CAM_SIM_LOCK(sim);
2626 (*(sim->sim_action))(sim, start_ccb);
2627 if (lock)
2628 CAM_SIM_UNLOCK(sim);
2629 break;
2630 case XPT_PATH_STATS:
2631 start_ccb->cpis.last_reset = path->bus->last_reset;
2632 start_ccb->ccb_h.status = CAM_REQ_CMP;
2633 break;
2634 case XPT_GDEV_TYPE:
2635 {
2636 struct cam_ed *dev;
2637
2638 dev = path->device;
2639 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) {
2640 start_ccb->ccb_h.status = CAM_DEV_NOT_THERE;
2641 } else {
2642 struct ccb_getdev *cgd;
2643
2644 cgd = &start_ccb->cgd;
2645 cgd->protocol = dev->protocol;
2646 cgd->inq_data = dev->inq_data;
2647 cgd->ident_data = dev->ident_data;
2648 cgd->inq_flags = dev->inq_flags;
2649 cgd->ccb_h.status = CAM_REQ_CMP;
2650 cgd->serial_num_len = dev->serial_num_len;
2651 if ((dev->serial_num_len > 0)
2652 && (dev->serial_num != NULL))
2653 bcopy(dev->serial_num, cgd->serial_num,
2654 dev->serial_num_len);
2655 }
2656 break;
2657 }
2658 case XPT_GDEV_STATS:
2659 {
2660 struct cam_ed *dev;
2661
2662 dev = path->device;
2663 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) {
2664 start_ccb->ccb_h.status = CAM_DEV_NOT_THERE;
2665 } else {
2666 struct ccb_getdevstats *cgds;
2667 struct cam_eb *bus;
2668 struct cam_et *tar;
2669 struct cam_devq *devq;
2670
2671 cgds = &start_ccb->cgds;
2672 bus = path->bus;
2673 tar = path->target;
2674 devq = bus->sim->devq;
2675 mtx_lock(&devq->send_mtx);
2676 cgds->dev_openings = dev->ccbq.dev_openings;
2677 cgds->dev_active = dev->ccbq.dev_active;
2678 cgds->allocated = dev->ccbq.allocated;
2679 cgds->queued = cam_ccbq_pending_ccb_count(&dev->ccbq);
2680 cgds->held = cgds->allocated - cgds->dev_active -
2681 cgds->queued;
2682 cgds->last_reset = tar->last_reset;
2683 cgds->maxtags = dev->maxtags;
2684 cgds->mintags = dev->mintags;
2685 if (timevalcmp(&tar->last_reset, &bus->last_reset, <))
2686 cgds->last_reset = bus->last_reset;
2687 mtx_unlock(&devq->send_mtx);
2688 cgds->ccb_h.status = CAM_REQ_CMP;
2689 }
2690 break;
2691 }
2692 case XPT_GDEVLIST:
2693 {
2694 struct cam_periph *nperiph;
2695 struct periph_list *periph_head;
2696 struct ccb_getdevlist *cgdl;
2697 u_int i;
2698 struct cam_ed *device;
2699 int found;
2700
2701
2702 found = 0;
2703
2704 /*
2705 * Don't want anyone mucking with our data.
2706 */
2707 device = path->device;
2708 periph_head = &device->periphs;
2709 cgdl = &start_ccb->cgdl;
2710
2711 /*
2712 * Check and see if the list has changed since the user
2713 * last requested a list member. If so, tell them that the
2714 * list has changed, and therefore they need to start over
2715 * from the beginning.
2716 */
2717 if ((cgdl->index != 0) &&
2718 (cgdl->generation != device->generation)) {
2719 cgdl->status = CAM_GDEVLIST_LIST_CHANGED;
2720 break;
2721 }
2722
2723 /*
2724 * Traverse the list of peripherals and attempt to find
2725 * the requested peripheral.
2726 */
2727 for (nperiph = SLIST_FIRST(periph_head), i = 0;
2728 (nperiph != NULL) && (i <= cgdl->index);
2729 nperiph = SLIST_NEXT(nperiph, periph_links), i++) {
2730 if (i == cgdl->index) {
2731 strncpy(cgdl->periph_name,
2732 nperiph->periph_name,
2733 DEV_IDLEN);
2734 cgdl->unit_number = nperiph->unit_number;
2735 found = 1;
2736 }
2737 }
2738 if (found == 0) {
2739 cgdl->status = CAM_GDEVLIST_ERROR;
2740 break;
2741 }
2742
2743 if (nperiph == NULL)
2744 cgdl->status = CAM_GDEVLIST_LAST_DEVICE;
2745 else
2746 cgdl->status = CAM_GDEVLIST_MORE_DEVS;
2747
2748 cgdl->index++;
2749 cgdl->generation = device->generation;
2750
2751 cgdl->ccb_h.status = CAM_REQ_CMP;
2752 break;
2753 }
2754 case XPT_DEV_MATCH:
2755 {
2756 dev_pos_type position_type;
2757 struct ccb_dev_match *cdm;
2758
2759 cdm = &start_ccb->cdm;
2760
2761 /*
2762 * There are two ways of getting at information in the EDT.
2763 * The first way is via the primary EDT tree. It starts
2764 * with a list of busses, then a list of targets on a bus,
2765 * then devices/luns on a target, and then peripherals on a
2766 * device/lun. The "other" way is by the peripheral driver
2767 * lists. The peripheral driver lists are organized by
2768 * peripheral driver. (obviously) So it makes sense to
2769 * use the peripheral driver list if the user is looking
2770 * for something like "da1", or all "da" devices. If the
2771 * user is looking for something on a particular bus/target
2772 * or lun, it's generally better to go through the EDT tree.
2773 */
2774
2775 if (cdm->pos.position_type != CAM_DEV_POS_NONE)
2776 position_type = cdm->pos.position_type;
2777 else {
2778 u_int i;
2779
2780 position_type = CAM_DEV_POS_NONE;
2781
2782 for (i = 0; i < cdm->num_patterns; i++) {
2783 if ((cdm->patterns[i].type == DEV_MATCH_BUS)
2784 ||(cdm->patterns[i].type == DEV_MATCH_DEVICE)){
2785 position_type = CAM_DEV_POS_EDT;
2786 break;
2787 }
2788 }
2789
2790 if (cdm->num_patterns == 0)
2791 position_type = CAM_DEV_POS_EDT;
2792 else if (position_type == CAM_DEV_POS_NONE)
2793 position_type = CAM_DEV_POS_PDRV;
2794 }
2795
2796 switch(position_type & CAM_DEV_POS_TYPEMASK) {
2797 case CAM_DEV_POS_EDT:
2798 xptedtmatch(cdm);
2799 break;
2800 case CAM_DEV_POS_PDRV:
2801 xptperiphlistmatch(cdm);
2802 break;
2803 default:
2804 cdm->status = CAM_DEV_MATCH_ERROR;
2805 break;
2806 }
2807
2808 if (cdm->status == CAM_DEV_MATCH_ERROR)
2809 start_ccb->ccb_h.status = CAM_REQ_CMP_ERR;
2810 else
2811 start_ccb->ccb_h.status = CAM_REQ_CMP;
2812
2813 break;
2814 }
2815 case XPT_SASYNC_CB:
2816 {
2817 struct ccb_setasync *csa;
2818 struct async_node *cur_entry;
2819 struct async_list *async_head;
2820 u_int32_t added;
2821
2822 csa = &start_ccb->csa;
2823 added = csa->event_enable;
2824 async_head = &path->device->asyncs;
2825
2826 /*
2827 * If there is already an entry for us, simply
2828 * update it.
2829 */
2830 cur_entry = SLIST_FIRST(async_head);
2831 while (cur_entry != NULL) {
2832 if ((cur_entry->callback_arg == csa->callback_arg)
2833 && (cur_entry->callback == csa->callback))
2834 break;
2835 cur_entry = SLIST_NEXT(cur_entry, links);
2836 }
2837
2838 if (cur_entry != NULL) {
2839 /*
2840 * If the request has no flags set,
2841 * remove the entry.
2842 */
2843 added &= ~cur_entry->event_enable;
2844 if (csa->event_enable == 0) {
2845 SLIST_REMOVE(async_head, cur_entry,
2846 async_node, links);
2847 xpt_release_device(path->device);
2848 free(cur_entry, M_CAMXPT);
2849 } else {
2850 cur_entry->event_enable = csa->event_enable;
2851 }
2852 csa->event_enable = added;
2853 } else {
2854 cur_entry = malloc(sizeof(*cur_entry), M_CAMXPT,
2855 M_NOWAIT);
2856 if (cur_entry == NULL) {
2857 csa->ccb_h.status = CAM_RESRC_UNAVAIL;
2858 break;
2859 }
2860 cur_entry->event_enable = csa->event_enable;
2861 cur_entry->event_lock =
2862 mtx_owned(path->bus->sim->mtx) ? 1 : 0;
2863 cur_entry->callback_arg = csa->callback_arg;
2864 cur_entry->callback = csa->callback;
2865 SLIST_INSERT_HEAD(async_head, cur_entry, links);
2866 xpt_acquire_device(path->device);
2867 }
2868 start_ccb->ccb_h.status = CAM_REQ_CMP;
2869 break;
2870 }
2871 case XPT_REL_SIMQ:
2872 {
2873 struct ccb_relsim *crs;
2874 struct cam_ed *dev;
2875
2876 crs = &start_ccb->crs;
2877 dev = path->device;
2878 if (dev == NULL) {
2879
2880 crs->ccb_h.status = CAM_DEV_NOT_THERE;
2881 break;
2882 }
2883
2884 if ((crs->release_flags & RELSIM_ADJUST_OPENINGS) != 0) {
2885
2886 /* Don't ever go below one opening */
2887 if (crs->openings > 0) {
2888 xpt_dev_ccbq_resize(path, crs->openings);
2889 if (bootverbose) {
2890 xpt_print(path,
2891 "number of openings is now %d\n",
2892 crs->openings);
2893 }
2894 }
2895 }
2896
2897 mtx_lock(&dev->sim->devq->send_mtx);
2898 if ((crs->release_flags & RELSIM_RELEASE_AFTER_TIMEOUT) != 0) {
2899
2900 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) {
2901
2902 /*
2903 * Just extend the old timeout and decrement
2904 * the freeze count so that a single timeout
2905 * is sufficient for releasing the queue.
2906 */
2907 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
2908 callout_stop(&dev->callout);
2909 } else {
2910
2911 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
2912 }
2913
2914 callout_reset_sbt(&dev->callout,
2915 SBT_1MS * crs->release_timeout, 0,
2916 xpt_release_devq_timeout, dev, 0);
2917
2918 dev->flags |= CAM_DEV_REL_TIMEOUT_PENDING;
2919
2920 }
2921
2922 if ((crs->release_flags & RELSIM_RELEASE_AFTER_CMDCMPLT) != 0) {
2923
2924 if ((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0) {
2925 /*
2926 * Decrement the freeze count so that a single
2927 * completion is still sufficient to unfreeze
2928 * the queue.
2929 */
2930 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
2931 } else {
2932
2933 dev->flags |= CAM_DEV_REL_ON_COMPLETE;
2934 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
2935 }
2936 }
2937
2938 if ((crs->release_flags & RELSIM_RELEASE_AFTER_QEMPTY) != 0) {
2939
2940 if ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0
2941 || (dev->ccbq.dev_active == 0)) {
2942
2943 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
2944 } else {
2945
2946 dev->flags |= CAM_DEV_REL_ON_QUEUE_EMPTY;
2947 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
2948 }
2949 }
2950 mtx_unlock(&dev->sim->devq->send_mtx);
2951
2952 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) == 0)
2953 xpt_release_devq(path, /*count*/1, /*run_queue*/TRUE);
2954 start_ccb->crs.qfrozen_cnt = dev->ccbq.queue.qfrozen_cnt;
2955 start_ccb->ccb_h.status = CAM_REQ_CMP;
2956 break;
2957 }
2958 case XPT_DEBUG: {
2959 struct cam_path *oldpath;
2960
2961 /* Check that all request bits are supported. */
2962 if (start_ccb->cdbg.flags & ~(CAM_DEBUG_COMPILE)) {
2963 start_ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
2964 break;
2965 }
2966
2967 cam_dflags = CAM_DEBUG_NONE;
2968 if (cam_dpath != NULL) {
2969 oldpath = cam_dpath;
2970 cam_dpath = NULL;
2971 xpt_free_path(oldpath);
2972 }
2973 if (start_ccb->cdbg.flags != CAM_DEBUG_NONE) {
2974 if (xpt_create_path(&cam_dpath, NULL,
2975 start_ccb->ccb_h.path_id,
2976 start_ccb->ccb_h.target_id,
2977 start_ccb->ccb_h.target_lun) !=
2978 CAM_REQ_CMP) {
2979 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
2980 } else {
2981 cam_dflags = start_ccb->cdbg.flags;
2982 start_ccb->ccb_h.status = CAM_REQ_CMP;
2983 xpt_print(cam_dpath, "debugging flags now %x\n",
2984 cam_dflags);
2985 }
2986 } else
2987 start_ccb->ccb_h.status = CAM_REQ_CMP;
2988 break;
2989 }
2990 case XPT_NOOP:
2991 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0)
2992 xpt_freeze_devq(path, 1);
2993 start_ccb->ccb_h.status = CAM_REQ_CMP;
2994 break;
2995 default:
2996 case XPT_SDEV_TYPE:
2997 case XPT_TERM_IO:
2998 case XPT_ENG_INQ:
2999 /* XXX Implement */
3000 printf("%s: CCB type %#x not supported\n", __func__,
3001 start_ccb->ccb_h.func_code);
3002 start_ccb->ccb_h.status = CAM_PROVIDE_FAIL;
3003 if (start_ccb->ccb_h.func_code & XPT_FC_DEV_QUEUED) {
3004 xpt_done(start_ccb);
3005 }
3006 break;
3007 }
3008 }
3009
3010 void
xpt_polled_action(union ccb * start_ccb)3011 xpt_polled_action(union ccb *start_ccb)
3012 {
3013 u_int32_t timeout;
3014 struct cam_sim *sim;
3015 struct cam_devq *devq;
3016 struct cam_ed *dev;
3017
3018 timeout = start_ccb->ccb_h.timeout * 10;
3019 sim = start_ccb->ccb_h.path->bus->sim;
3020 devq = sim->devq;
3021 dev = start_ccb->ccb_h.path->device;
3022
3023 mtx_unlock(&dev->device_mtx);
3024
3025 /*
3026 * Steal an opening so that no other queued requests
3027 * can get it before us while we simulate interrupts.
3028 */
3029 mtx_lock(&devq->send_mtx);
3030 dev->ccbq.dev_openings--;
3031 while((devq->send_openings <= 0 || dev->ccbq.dev_openings < 0) &&
3032 (--timeout > 0)) {
3033 mtx_unlock(&devq->send_mtx);
3034 DELAY(100);
3035 CAM_SIM_LOCK(sim);
3036 (*(sim->sim_poll))(sim);
3037 CAM_SIM_UNLOCK(sim);
3038 camisr_runqueue();
3039 mtx_lock(&devq->send_mtx);
3040 }
3041 dev->ccbq.dev_openings++;
3042 mtx_unlock(&devq->send_mtx);
3043
3044 if (timeout != 0) {
3045 xpt_action(start_ccb);
3046 while(--timeout > 0) {
3047 CAM_SIM_LOCK(sim);
3048 (*(sim->sim_poll))(sim);
3049 CAM_SIM_UNLOCK(sim);
3050 camisr_runqueue();
3051 if ((start_ccb->ccb_h.status & CAM_STATUS_MASK)
3052 != CAM_REQ_INPROG)
3053 break;
3054 DELAY(100);
3055 }
3056 if (timeout == 0) {
3057 /*
3058 * XXX Is it worth adding a sim_timeout entry
3059 * point so we can attempt recovery? If
3060 * this is only used for dumps, I don't think
3061 * it is.
3062 */
3063 start_ccb->ccb_h.status = CAM_CMD_TIMEOUT;
3064 }
3065 } else {
3066 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
3067 }
3068
3069 mtx_lock(&dev->device_mtx);
3070 }
3071
3072 /*
3073 * Schedule a peripheral driver to receive a ccb when its
3074 * target device has space for more transactions.
3075 */
3076 void
xpt_schedule(struct cam_periph * periph,u_int32_t new_priority)3077 xpt_schedule(struct cam_periph *periph, u_int32_t new_priority)
3078 {
3079
3080 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("xpt_schedule\n"));
3081 cam_periph_assert(periph, MA_OWNED);
3082 if (new_priority < periph->scheduled_priority) {
3083 periph->scheduled_priority = new_priority;
3084 xpt_run_allocq(periph, 0);
3085 }
3086 }
3087
3088
3089 /*
3090 * Schedule a device to run on a given queue.
3091 * If the device was inserted as a new entry on the queue,
3092 * return 1 meaning the device queue should be run. If we
3093 * were already queued, implying someone else has already
3094 * started the queue, return 0 so the caller doesn't attempt
3095 * to run the queue.
3096 */
3097 static int
xpt_schedule_dev(struct camq * queue,cam_pinfo * pinfo,u_int32_t new_priority)3098 xpt_schedule_dev(struct camq *queue, cam_pinfo *pinfo,
3099 u_int32_t new_priority)
3100 {
3101 int retval;
3102 u_int32_t old_priority;
3103
3104 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_schedule_dev\n"));
3105
3106 old_priority = pinfo->priority;
3107
3108 /*
3109 * Are we already queued?
3110 */
3111 if (pinfo->index != CAM_UNQUEUED_INDEX) {
3112 /* Simply reorder based on new priority */
3113 if (new_priority < old_priority) {
3114 camq_change_priority(queue, pinfo->index,
3115 new_priority);
3116 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3117 ("changed priority to %d\n",
3118 new_priority));
3119 retval = 1;
3120 } else
3121 retval = 0;
3122 } else {
3123 /* New entry on the queue */
3124 if (new_priority < old_priority)
3125 pinfo->priority = new_priority;
3126
3127 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3128 ("Inserting onto queue\n"));
3129 pinfo->generation = ++queue->generation;
3130 camq_insert(queue, pinfo);
3131 retval = 1;
3132 }
3133 return (retval);
3134 }
3135
3136 static void
xpt_run_allocq_task(void * context,int pending)3137 xpt_run_allocq_task(void *context, int pending)
3138 {
3139 struct cam_periph *periph = context;
3140
3141 cam_periph_lock(periph);
3142 periph->flags &= ~CAM_PERIPH_RUN_TASK;
3143 xpt_run_allocq(periph, 1);
3144 cam_periph_unlock(periph);
3145 cam_periph_release(periph);
3146 }
3147
3148 static void
xpt_run_allocq(struct cam_periph * periph,int sleep)3149 xpt_run_allocq(struct cam_periph *periph, int sleep)
3150 {
3151 struct cam_ed *device;
3152 union ccb *ccb;
3153 uint32_t prio;
3154
3155 cam_periph_assert(periph, MA_OWNED);
3156 if (periph->periph_allocating)
3157 return;
3158 periph->periph_allocating = 1;
3159 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_allocq(%p)\n", periph));
3160 device = periph->path->device;
3161 ccb = NULL;
3162 restart:
3163 while ((prio = min(periph->scheduled_priority,
3164 periph->immediate_priority)) != CAM_PRIORITY_NONE &&
3165 (periph->periph_allocated - (ccb != NULL ? 1 : 0) <
3166 device->ccbq.total_openings || prio <= CAM_PRIORITY_OOB)) {
3167
3168 if (ccb == NULL &&
3169 (ccb = xpt_get_ccb_nowait(periph)) == NULL) {
3170 if (sleep) {
3171 ccb = xpt_get_ccb(periph);
3172 goto restart;
3173 }
3174 if (periph->flags & CAM_PERIPH_RUN_TASK)
3175 break;
3176 cam_periph_doacquire(periph);
3177 periph->flags |= CAM_PERIPH_RUN_TASK;
3178 taskqueue_enqueue(xsoftc.xpt_taskq,
3179 &periph->periph_run_task);
3180 break;
3181 }
3182 xpt_setup_ccb(&ccb->ccb_h, periph->path, prio);
3183 if (prio == periph->immediate_priority) {
3184 periph->immediate_priority = CAM_PRIORITY_NONE;
3185 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3186 ("waking cam_periph_getccb()\n"));
3187 SLIST_INSERT_HEAD(&periph->ccb_list, &ccb->ccb_h,
3188 periph_links.sle);
3189 wakeup(&periph->ccb_list);
3190 } else {
3191 periph->scheduled_priority = CAM_PRIORITY_NONE;
3192 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3193 ("calling periph_start()\n"));
3194 periph->periph_start(periph, ccb);
3195 }
3196 ccb = NULL;
3197 }
3198 if (ccb != NULL)
3199 xpt_release_ccb(ccb);
3200 periph->periph_allocating = 0;
3201 }
3202
3203 static void
xpt_run_devq(struct cam_devq * devq)3204 xpt_run_devq(struct cam_devq *devq)
3205 {
3206 char cdb_str[(SCSI_MAX_CDBLEN * 3) + 1];
3207 int lock;
3208
3209 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_devq\n"));
3210
3211 devq->send_queue.qfrozen_cnt++;
3212 while ((devq->send_queue.entries > 0)
3213 && (devq->send_openings > 0)
3214 && (devq->send_queue.qfrozen_cnt <= 1)) {
3215 struct cam_ed *device;
3216 union ccb *work_ccb;
3217 struct cam_sim *sim;
3218
3219 device = (struct cam_ed *)camq_remove(&devq->send_queue,
3220 CAMQ_HEAD);
3221 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3222 ("running device %p\n", device));
3223
3224 work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD);
3225 if (work_ccb == NULL) {
3226 printf("device on run queue with no ccbs???\n");
3227 continue;
3228 }
3229
3230 if ((work_ccb->ccb_h.flags & CAM_HIGH_POWER) != 0) {
3231
3232 mtx_lock(&xsoftc.xpt_highpower_lock);
3233 if (xsoftc.num_highpower <= 0) {
3234 /*
3235 * We got a high power command, but we
3236 * don't have any available slots. Freeze
3237 * the device queue until we have a slot
3238 * available.
3239 */
3240 xpt_freeze_devq_device(device, 1);
3241 STAILQ_INSERT_TAIL(&xsoftc.highpowerq, device,
3242 highpowerq_entry);
3243
3244 mtx_unlock(&xsoftc.xpt_highpower_lock);
3245 continue;
3246 } else {
3247 /*
3248 * Consume a high power slot while
3249 * this ccb runs.
3250 */
3251 xsoftc.num_highpower--;
3252 }
3253 mtx_unlock(&xsoftc.xpt_highpower_lock);
3254 }
3255 cam_ccbq_remove_ccb(&device->ccbq, work_ccb);
3256 cam_ccbq_send_ccb(&device->ccbq, work_ccb);
3257 devq->send_openings--;
3258 devq->send_active++;
3259 xpt_schedule_devq(devq, device);
3260 mtx_unlock(&devq->send_mtx);
3261
3262 if ((work_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0) {
3263 /*
3264 * The client wants to freeze the queue
3265 * after this CCB is sent.
3266 */
3267 xpt_freeze_devq(work_ccb->ccb_h.path, 1);
3268 }
3269
3270 /* In Target mode, the peripheral driver knows best... */
3271 if (work_ccb->ccb_h.func_code == XPT_SCSI_IO) {
3272 if ((device->inq_flags & SID_CmdQue) != 0
3273 && work_ccb->csio.tag_action != CAM_TAG_ACTION_NONE)
3274 work_ccb->ccb_h.flags |= CAM_TAG_ACTION_VALID;
3275 else
3276 /*
3277 * Clear this in case of a retried CCB that
3278 * failed due to a rejected tag.
3279 */
3280 work_ccb->ccb_h.flags &= ~CAM_TAG_ACTION_VALID;
3281 }
3282
3283 switch (work_ccb->ccb_h.func_code) {
3284 case XPT_SCSI_IO:
3285 CAM_DEBUG(work_ccb->ccb_h.path,
3286 CAM_DEBUG_CDB,("%s. CDB: %s\n",
3287 scsi_op_desc(work_ccb->csio.cdb_io.cdb_bytes[0],
3288 &device->inq_data),
3289 scsi_cdb_string(work_ccb->csio.cdb_io.cdb_bytes,
3290 cdb_str, sizeof(cdb_str))));
3291 break;
3292 case XPT_ATA_IO:
3293 CAM_DEBUG(work_ccb->ccb_h.path,
3294 CAM_DEBUG_CDB,("%s. ACB: %s\n",
3295 ata_op_string(&work_ccb->ataio.cmd),
3296 ata_cmd_string(&work_ccb->ataio.cmd,
3297 cdb_str, sizeof(cdb_str))));
3298 break;
3299 default:
3300 break;
3301 }
3302
3303 /*
3304 * Device queues can be shared among multiple SIM instances
3305 * that reside on different busses. Use the SIM from the
3306 * queued device, rather than the one from the calling bus.
3307 */
3308 sim = device->sim;
3309 lock = (mtx_owned(sim->mtx) == 0);
3310 if (lock)
3311 CAM_SIM_LOCK(sim);
3312 (*(sim->sim_action))(sim, work_ccb);
3313 if (lock)
3314 CAM_SIM_UNLOCK(sim);
3315 mtx_lock(&devq->send_mtx);
3316 }
3317 devq->send_queue.qfrozen_cnt--;
3318 }
3319
3320 /*
3321 * This function merges stuff from the slave ccb into the master ccb, while
3322 * keeping important fields in the master ccb constant.
3323 */
3324 void
xpt_merge_ccb(union ccb * master_ccb,union ccb * slave_ccb)3325 xpt_merge_ccb(union ccb *master_ccb, union ccb *slave_ccb)
3326 {
3327
3328 /*
3329 * Pull fields that are valid for peripheral drivers to set
3330 * into the master CCB along with the CCB "payload".
3331 */
3332 master_ccb->ccb_h.retry_count = slave_ccb->ccb_h.retry_count;
3333 master_ccb->ccb_h.func_code = slave_ccb->ccb_h.func_code;
3334 master_ccb->ccb_h.timeout = slave_ccb->ccb_h.timeout;
3335 master_ccb->ccb_h.flags = slave_ccb->ccb_h.flags;
3336 bcopy(&(&slave_ccb->ccb_h)[1], &(&master_ccb->ccb_h)[1],
3337 sizeof(union ccb) - sizeof(struct ccb_hdr));
3338 }
3339
3340 void
xpt_setup_ccb(struct ccb_hdr * ccb_h,struct cam_path * path,u_int32_t priority)3341 xpt_setup_ccb(struct ccb_hdr *ccb_h, struct cam_path *path, u_int32_t priority)
3342 {
3343
3344 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_setup_ccb\n"));
3345 ccb_h->pinfo.priority = priority;
3346 ccb_h->path = path;
3347 ccb_h->path_id = path->bus->path_id;
3348 if (path->target)
3349 ccb_h->target_id = path->target->target_id;
3350 else
3351 ccb_h->target_id = CAM_TARGET_WILDCARD;
3352 if (path->device) {
3353 ccb_h->target_lun = path->device->lun_id;
3354 ccb_h->pinfo.generation = ++path->device->ccbq.queue.generation;
3355 } else {
3356 ccb_h->target_lun = CAM_TARGET_WILDCARD;
3357 }
3358 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX;
3359 ccb_h->flags = 0;
3360 ccb_h->xflags = 0;
3361 }
3362
3363 /* Path manipulation functions */
3364 cam_status
xpt_create_path(struct cam_path ** new_path_ptr,struct cam_periph * perph,path_id_t path_id,target_id_t target_id,lun_id_t lun_id)3365 xpt_create_path(struct cam_path **new_path_ptr, struct cam_periph *perph,
3366 path_id_t path_id, target_id_t target_id, lun_id_t lun_id)
3367 {
3368 struct cam_path *path;
3369 cam_status status;
3370
3371 path = (struct cam_path *)malloc(sizeof(*path), M_CAMPATH, M_NOWAIT);
3372
3373 if (path == NULL) {
3374 status = CAM_RESRC_UNAVAIL;
3375 return(status);
3376 }
3377 status = xpt_compile_path(path, perph, path_id, target_id, lun_id);
3378 if (status != CAM_REQ_CMP) {
3379 free(path, M_CAMPATH);
3380 path = NULL;
3381 }
3382 *new_path_ptr = path;
3383 return (status);
3384 }
3385
3386 cam_status
xpt_create_path_unlocked(struct cam_path ** new_path_ptr,struct cam_periph * periph,path_id_t path_id,target_id_t target_id,lun_id_t lun_id)3387 xpt_create_path_unlocked(struct cam_path **new_path_ptr,
3388 struct cam_periph *periph, path_id_t path_id,
3389 target_id_t target_id, lun_id_t lun_id)
3390 {
3391
3392 return (xpt_create_path(new_path_ptr, periph, path_id, target_id,
3393 lun_id));
3394 }
3395
3396 cam_status
xpt_compile_path(struct cam_path * new_path,struct cam_periph * perph,path_id_t path_id,target_id_t target_id,lun_id_t lun_id)3397 xpt_compile_path(struct cam_path *new_path, struct cam_periph *perph,
3398 path_id_t path_id, target_id_t target_id, lun_id_t lun_id)
3399 {
3400 struct cam_eb *bus;
3401 struct cam_et *target;
3402 struct cam_ed *device;
3403 cam_status status;
3404
3405 status = CAM_REQ_CMP; /* Completed without error */
3406 target = NULL; /* Wildcarded */
3407 device = NULL; /* Wildcarded */
3408
3409 /*
3410 * We will potentially modify the EDT, so block interrupts
3411 * that may attempt to create cam paths.
3412 */
3413 bus = xpt_find_bus(path_id);
3414 if (bus == NULL) {
3415 status = CAM_PATH_INVALID;
3416 } else {
3417 xpt_lock_buses();
3418 mtx_lock(&bus->eb_mtx);
3419 target = xpt_find_target(bus, target_id);
3420 if (target == NULL) {
3421 /* Create one */
3422 struct cam_et *new_target;
3423
3424 new_target = xpt_alloc_target(bus, target_id);
3425 if (new_target == NULL) {
3426 status = CAM_RESRC_UNAVAIL;
3427 } else {
3428 target = new_target;
3429 }
3430 }
3431 xpt_unlock_buses();
3432 if (target != NULL) {
3433 device = xpt_find_device(target, lun_id);
3434 if (device == NULL) {
3435 /* Create one */
3436 struct cam_ed *new_device;
3437
3438 new_device =
3439 (*(bus->xport->alloc_device))(bus,
3440 target,
3441 lun_id);
3442 if (new_device == NULL) {
3443 status = CAM_RESRC_UNAVAIL;
3444 } else {
3445 device = new_device;
3446 }
3447 }
3448 }
3449 mtx_unlock(&bus->eb_mtx);
3450 }
3451
3452 /*
3453 * Only touch the user's data if we are successful.
3454 */
3455 if (status == CAM_REQ_CMP) {
3456 new_path->periph = perph;
3457 new_path->bus = bus;
3458 new_path->target = target;
3459 new_path->device = device;
3460 CAM_DEBUG(new_path, CAM_DEBUG_TRACE, ("xpt_compile_path\n"));
3461 } else {
3462 if (device != NULL)
3463 xpt_release_device(device);
3464 if (target != NULL)
3465 xpt_release_target(target);
3466 if (bus != NULL)
3467 xpt_release_bus(bus);
3468 }
3469 return (status);
3470 }
3471
3472 cam_status
xpt_clone_path(struct cam_path ** new_path_ptr,struct cam_path * path)3473 xpt_clone_path(struct cam_path **new_path_ptr, struct cam_path *path)
3474 {
3475 struct cam_path *new_path;
3476
3477 new_path = (struct cam_path *)malloc(sizeof(*path), M_CAMPATH, M_NOWAIT);
3478 if (new_path == NULL)
3479 return(CAM_RESRC_UNAVAIL);
3480 xpt_copy_path(new_path, path);
3481 *new_path_ptr = new_path;
3482 return (CAM_REQ_CMP);
3483 }
3484
3485 void
xpt_copy_path(struct cam_path * new_path,struct cam_path * path)3486 xpt_copy_path(struct cam_path *new_path, struct cam_path *path)
3487 {
3488
3489 *new_path = *path;
3490 if (path->bus != NULL)
3491 xpt_acquire_bus(path->bus);
3492 if (path->target != NULL)
3493 xpt_acquire_target(path->target);
3494 if (path->device != NULL)
3495 xpt_acquire_device(path->device);
3496 }
3497
3498 void
xpt_release_path(struct cam_path * path)3499 xpt_release_path(struct cam_path *path)
3500 {
3501 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_path\n"));
3502 if (path->device != NULL) {
3503 xpt_release_device(path->device);
3504 path->device = NULL;
3505 }
3506 if (path->target != NULL) {
3507 xpt_release_target(path->target);
3508 path->target = NULL;
3509 }
3510 if (path->bus != NULL) {
3511 xpt_release_bus(path->bus);
3512 path->bus = NULL;
3513 }
3514 }
3515
3516 void
xpt_free_path(struct cam_path * path)3517 xpt_free_path(struct cam_path *path)
3518 {
3519
3520 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_free_path\n"));
3521 xpt_release_path(path);
3522 free(path, M_CAMPATH);
3523 }
3524
3525 void
xpt_path_counts(struct cam_path * path,uint32_t * bus_ref,uint32_t * periph_ref,uint32_t * target_ref,uint32_t * device_ref)3526 xpt_path_counts(struct cam_path *path, uint32_t *bus_ref,
3527 uint32_t *periph_ref, uint32_t *target_ref, uint32_t *device_ref)
3528 {
3529
3530 xpt_lock_buses();
3531 if (bus_ref) {
3532 if (path->bus)
3533 *bus_ref = path->bus->refcount;
3534 else
3535 *bus_ref = 0;
3536 }
3537 if (periph_ref) {
3538 if (path->periph)
3539 *periph_ref = path->periph->refcount;
3540 else
3541 *periph_ref = 0;
3542 }
3543 xpt_unlock_buses();
3544 if (target_ref) {
3545 if (path->target)
3546 *target_ref = path->target->refcount;
3547 else
3548 *target_ref = 0;
3549 }
3550 if (device_ref) {
3551 if (path->device)
3552 *device_ref = path->device->refcount;
3553 else
3554 *device_ref = 0;
3555 }
3556 }
3557
3558 /*
3559 * Return -1 for failure, 0 for exact match, 1 for match with wildcards
3560 * in path1, 2 for match with wildcards in path2.
3561 */
3562 int
xpt_path_comp(struct cam_path * path1,struct cam_path * path2)3563 xpt_path_comp(struct cam_path *path1, struct cam_path *path2)
3564 {
3565 int retval = 0;
3566
3567 if (path1->bus != path2->bus) {
3568 if (path1->bus->path_id == CAM_BUS_WILDCARD)
3569 retval = 1;
3570 else if (path2->bus->path_id == CAM_BUS_WILDCARD)
3571 retval = 2;
3572 else
3573 return (-1);
3574 }
3575 if (path1->target != path2->target) {
3576 if (path1->target->target_id == CAM_TARGET_WILDCARD) {
3577 if (retval == 0)
3578 retval = 1;
3579 } else if (path2->target->target_id == CAM_TARGET_WILDCARD)
3580 retval = 2;
3581 else
3582 return (-1);
3583 }
3584 if (path1->device != path2->device) {
3585 if (path1->device->lun_id == CAM_LUN_WILDCARD) {
3586 if (retval == 0)
3587 retval = 1;
3588 } else if (path2->device->lun_id == CAM_LUN_WILDCARD)
3589 retval = 2;
3590 else
3591 return (-1);
3592 }
3593 return (retval);
3594 }
3595
3596 int
xpt_path_comp_dev(struct cam_path * path,struct cam_ed * dev)3597 xpt_path_comp_dev(struct cam_path *path, struct cam_ed *dev)
3598 {
3599 int retval = 0;
3600
3601 if (path->bus != dev->target->bus) {
3602 if (path->bus->path_id == CAM_BUS_WILDCARD)
3603 retval = 1;
3604 else if (dev->target->bus->path_id == CAM_BUS_WILDCARD)
3605 retval = 2;
3606 else
3607 return (-1);
3608 }
3609 if (path->target != dev->target) {
3610 if (path->target->target_id == CAM_TARGET_WILDCARD) {
3611 if (retval == 0)
3612 retval = 1;
3613 } else if (dev->target->target_id == CAM_TARGET_WILDCARD)
3614 retval = 2;
3615 else
3616 return (-1);
3617 }
3618 if (path->device != dev) {
3619 if (path->device->lun_id == CAM_LUN_WILDCARD) {
3620 if (retval == 0)
3621 retval = 1;
3622 } else if (dev->lun_id == CAM_LUN_WILDCARD)
3623 retval = 2;
3624 else
3625 return (-1);
3626 }
3627 return (retval);
3628 }
3629
3630 void
xpt_print_path(struct cam_path * path)3631 xpt_print_path(struct cam_path *path)
3632 {
3633
3634 if (path == NULL)
3635 printf("(nopath): ");
3636 else {
3637 if (path->periph != NULL)
3638 printf("(%s%d:", path->periph->periph_name,
3639 path->periph->unit_number);
3640 else
3641 printf("(noperiph:");
3642
3643 if (path->bus != NULL)
3644 printf("%s%d:%d:", path->bus->sim->sim_name,
3645 path->bus->sim->unit_number,
3646 path->bus->sim->bus_id);
3647 else
3648 printf("nobus:");
3649
3650 if (path->target != NULL)
3651 printf("%d:", path->target->target_id);
3652 else
3653 printf("X:");
3654
3655 if (path->device != NULL)
3656 printf("%jx): ", (uintmax_t)path->device->lun_id);
3657 else
3658 printf("X): ");
3659 }
3660 }
3661
3662 void
xpt_print_device(struct cam_ed * device)3663 xpt_print_device(struct cam_ed *device)
3664 {
3665
3666 if (device == NULL)
3667 printf("(nopath): ");
3668 else {
3669 printf("(noperiph:%s%d:%d:%d:%jx): ", device->sim->sim_name,
3670 device->sim->unit_number,
3671 device->sim->bus_id,
3672 device->target->target_id,
3673 (uintmax_t)device->lun_id);
3674 }
3675 }
3676
3677 void
xpt_print(struct cam_path * path,const char * fmt,...)3678 xpt_print(struct cam_path *path, const char *fmt, ...)
3679 {
3680 va_list ap;
3681 xpt_print_path(path);
3682 va_start(ap, fmt);
3683 vprintf(fmt, ap);
3684 va_end(ap);
3685 }
3686
3687 int
xpt_path_string(struct cam_path * path,char * str,size_t str_len)3688 xpt_path_string(struct cam_path *path, char *str, size_t str_len)
3689 {
3690 struct sbuf sb;
3691
3692 sbuf_new(&sb, str, str_len, 0);
3693
3694 if (path == NULL)
3695 sbuf_printf(&sb, "(nopath): ");
3696 else {
3697 if (path->periph != NULL)
3698 sbuf_printf(&sb, "(%s%d:", path->periph->periph_name,
3699 path->periph->unit_number);
3700 else
3701 sbuf_printf(&sb, "(noperiph:");
3702
3703 if (path->bus != NULL)
3704 sbuf_printf(&sb, "%s%d:%d:", path->bus->sim->sim_name,
3705 path->bus->sim->unit_number,
3706 path->bus->sim->bus_id);
3707 else
3708 sbuf_printf(&sb, "nobus:");
3709
3710 if (path->target != NULL)
3711 sbuf_printf(&sb, "%d:", path->target->target_id);
3712 else
3713 sbuf_printf(&sb, "X:");
3714
3715 if (path->device != NULL)
3716 sbuf_printf(&sb, "%jx): ",
3717 (uintmax_t)path->device->lun_id);
3718 else
3719 sbuf_printf(&sb, "X): ");
3720 }
3721 sbuf_finish(&sb);
3722
3723 return(sbuf_len(&sb));
3724 }
3725
3726 path_id_t
xpt_path_path_id(struct cam_path * path)3727 xpt_path_path_id(struct cam_path *path)
3728 {
3729 return(path->bus->path_id);
3730 }
3731
3732 target_id_t
xpt_path_target_id(struct cam_path * path)3733 xpt_path_target_id(struct cam_path *path)
3734 {
3735 if (path->target != NULL)
3736 return (path->target->target_id);
3737 else
3738 return (CAM_TARGET_WILDCARD);
3739 }
3740
3741 lun_id_t
xpt_path_lun_id(struct cam_path * path)3742 xpt_path_lun_id(struct cam_path *path)
3743 {
3744 if (path->device != NULL)
3745 return (path->device->lun_id);
3746 else
3747 return (CAM_LUN_WILDCARD);
3748 }
3749
3750 struct cam_sim *
xpt_path_sim(struct cam_path * path)3751 xpt_path_sim(struct cam_path *path)
3752 {
3753
3754 return (path->bus->sim);
3755 }
3756
3757 struct cam_periph*
xpt_path_periph(struct cam_path * path)3758 xpt_path_periph(struct cam_path *path)
3759 {
3760
3761 return (path->periph);
3762 }
3763
3764 int
xpt_path_legacy_ata_id(struct cam_path * path)3765 xpt_path_legacy_ata_id(struct cam_path *path)
3766 {
3767 struct cam_eb *bus;
3768 int bus_id;
3769
3770 if ((strcmp(path->bus->sim->sim_name, "ata") != 0) &&
3771 strcmp(path->bus->sim->sim_name, "ahcich") != 0 &&
3772 strcmp(path->bus->sim->sim_name, "mvsch") != 0 &&
3773 strcmp(path->bus->sim->sim_name, "siisch") != 0)
3774 return (-1);
3775
3776 if (strcmp(path->bus->sim->sim_name, "ata") == 0 &&
3777 path->bus->sim->unit_number < 2) {
3778 bus_id = path->bus->sim->unit_number;
3779 } else {
3780 bus_id = 2;
3781 xpt_lock_buses();
3782 TAILQ_FOREACH(bus, &xsoftc.xpt_busses, links) {
3783 if (bus == path->bus)
3784 break;
3785 if ((strcmp(bus->sim->sim_name, "ata") == 0 &&
3786 bus->sim->unit_number >= 2) ||
3787 strcmp(bus->sim->sim_name, "ahcich") == 0 ||
3788 strcmp(bus->sim->sim_name, "mvsch") == 0 ||
3789 strcmp(bus->sim->sim_name, "siisch") == 0)
3790 bus_id++;
3791 }
3792 xpt_unlock_buses();
3793 }
3794 if (path->target != NULL) {
3795 if (path->target->target_id < 2)
3796 return (bus_id * 2 + path->target->target_id);
3797 else
3798 return (-1);
3799 } else
3800 return (bus_id * 2);
3801 }
3802
3803 /*
3804 * Release a CAM control block for the caller. Remit the cost of the structure
3805 * to the device referenced by the path. If the this device had no 'credits'
3806 * and peripheral drivers have registered async callbacks for this notification
3807 * call them now.
3808 */
3809 void
xpt_release_ccb(union ccb * free_ccb)3810 xpt_release_ccb(union ccb *free_ccb)
3811 {
3812 struct cam_ed *device;
3813 struct cam_periph *periph;
3814
3815 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_release_ccb\n"));
3816 xpt_path_assert(free_ccb->ccb_h.path, MA_OWNED);
3817 device = free_ccb->ccb_h.path->device;
3818 periph = free_ccb->ccb_h.path->periph;
3819
3820 xpt_free_ccb(free_ccb);
3821 periph->periph_allocated--;
3822 cam_ccbq_release_opening(&device->ccbq);
3823 xpt_run_allocq(periph, 0);
3824 }
3825
3826 /* Functions accessed by SIM drivers */
3827
3828 static struct xpt_xport xport_default = {
3829 .alloc_device = xpt_alloc_device_default,
3830 .action = xpt_action_default,
3831 .async = xpt_dev_async_default,
3832 };
3833
3834 /*
3835 * A sim structure, listing the SIM entry points and instance
3836 * identification info is passed to xpt_bus_register to hook the SIM
3837 * into the CAM framework. xpt_bus_register creates a cam_eb entry
3838 * for this new bus and places it in the array of busses and assigns
3839 * it a path_id. The path_id may be influenced by "hard wiring"
3840 * information specified by the user. Once interrupt services are
3841 * available, the bus will be probed.
3842 */
3843 int32_t
xpt_bus_register(struct cam_sim * sim,device_t parent,u_int32_t bus)3844 xpt_bus_register(struct cam_sim *sim, device_t parent, u_int32_t bus)
3845 {
3846 struct cam_eb *new_bus;
3847 struct cam_eb *old_bus;
3848 struct ccb_pathinq cpi;
3849 struct cam_path *path;
3850 cam_status status;
3851
3852 mtx_assert(sim->mtx, MA_OWNED);
3853
3854 sim->bus_id = bus;
3855 new_bus = (struct cam_eb *)malloc(sizeof(*new_bus),
3856 M_CAMXPT, M_NOWAIT|M_ZERO);
3857 if (new_bus == NULL) {
3858 /* Couldn't satisfy request */
3859 return (CAM_RESRC_UNAVAIL);
3860 }
3861
3862 mtx_init(&new_bus->eb_mtx, "CAM bus lock", NULL, MTX_DEF);
3863 TAILQ_INIT(&new_bus->et_entries);
3864 cam_sim_hold(sim);
3865 new_bus->sim = sim;
3866 timevalclear(&new_bus->last_reset);
3867 new_bus->flags = 0;
3868 new_bus->refcount = 1; /* Held until a bus_deregister event */
3869 new_bus->generation = 0;
3870
3871 xpt_lock_buses();
3872 sim->path_id = new_bus->path_id =
3873 xptpathid(sim->sim_name, sim->unit_number, sim->bus_id);
3874 old_bus = TAILQ_FIRST(&xsoftc.xpt_busses);
3875 while (old_bus != NULL
3876 && old_bus->path_id < new_bus->path_id)
3877 old_bus = TAILQ_NEXT(old_bus, links);
3878 if (old_bus != NULL)
3879 TAILQ_INSERT_BEFORE(old_bus, new_bus, links);
3880 else
3881 TAILQ_INSERT_TAIL(&xsoftc.xpt_busses, new_bus, links);
3882 xsoftc.bus_generation++;
3883 xpt_unlock_buses();
3884
3885 /*
3886 * Set a default transport so that a PATH_INQ can be issued to
3887 * the SIM. This will then allow for probing and attaching of
3888 * a more appropriate transport.
3889 */
3890 new_bus->xport = &xport_default;
3891
3892 status = xpt_create_path(&path, /*periph*/NULL, sim->path_id,
3893 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
3894 if (status != CAM_REQ_CMP) {
3895 xpt_release_bus(new_bus);
3896 free(path, M_CAMXPT);
3897 return (CAM_RESRC_UNAVAIL);
3898 }
3899
3900 xpt_setup_ccb(&cpi.ccb_h, path, CAM_PRIORITY_NORMAL);
3901 cpi.ccb_h.func_code = XPT_PATH_INQ;
3902 xpt_action((union ccb *)&cpi);
3903
3904 if (cpi.ccb_h.status == CAM_REQ_CMP) {
3905 switch (cpi.transport) {
3906 case XPORT_SPI:
3907 case XPORT_SAS:
3908 case XPORT_FC:
3909 case XPORT_USB:
3910 case XPORT_ISCSI:
3911 case XPORT_SRP:
3912 case XPORT_PPB:
3913 new_bus->xport = scsi_get_xport();
3914 break;
3915 case XPORT_ATA:
3916 case XPORT_SATA:
3917 new_bus->xport = ata_get_xport();
3918 break;
3919 default:
3920 new_bus->xport = &xport_default;
3921 break;
3922 }
3923 }
3924
3925 /* Notify interested parties */
3926 if (sim->path_id != CAM_XPT_PATH_ID) {
3927
3928 xpt_async(AC_PATH_REGISTERED, path, &cpi);
3929 if ((cpi.hba_misc & PIM_NOSCAN) == 0) {
3930 union ccb *scan_ccb;
3931
3932 /* Initiate bus rescan. */
3933 scan_ccb = xpt_alloc_ccb_nowait();
3934 if (scan_ccb != NULL) {
3935 scan_ccb->ccb_h.path = path;
3936 scan_ccb->ccb_h.func_code = XPT_SCAN_BUS;
3937 scan_ccb->crcn.flags = 0;
3938 xpt_rescan(scan_ccb);
3939 } else {
3940 xpt_print(path,
3941 "Can't allocate CCB to scan bus\n");
3942 xpt_free_path(path);
3943 }
3944 } else
3945 xpt_free_path(path);
3946 } else
3947 xpt_free_path(path);
3948 return (CAM_SUCCESS);
3949 }
3950
3951 int32_t
xpt_bus_deregister(path_id_t pathid)3952 xpt_bus_deregister(path_id_t pathid)
3953 {
3954 struct cam_path bus_path;
3955 cam_status status;
3956
3957 status = xpt_compile_path(&bus_path, NULL, pathid,
3958 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
3959 if (status != CAM_REQ_CMP)
3960 return (status);
3961
3962 xpt_async(AC_LOST_DEVICE, &bus_path, NULL);
3963 xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL);
3964
3965 /* Release the reference count held while registered. */
3966 xpt_release_bus(bus_path.bus);
3967 xpt_release_path(&bus_path);
3968
3969 return (CAM_REQ_CMP);
3970 }
3971
3972 static path_id_t
xptnextfreepathid(void)3973 xptnextfreepathid(void)
3974 {
3975 struct cam_eb *bus;
3976 path_id_t pathid;
3977 const char *strval;
3978
3979 mtx_assert(&xsoftc.xpt_topo_lock, MA_OWNED);
3980 pathid = 0;
3981 bus = TAILQ_FIRST(&xsoftc.xpt_busses);
3982 retry:
3983 /* Find an unoccupied pathid */
3984 while (bus != NULL && bus->path_id <= pathid) {
3985 if (bus->path_id == pathid)
3986 pathid++;
3987 bus = TAILQ_NEXT(bus, links);
3988 }
3989
3990 /*
3991 * Ensure that this pathid is not reserved for
3992 * a bus that may be registered in the future.
3993 */
3994 if (resource_string_value("scbus", pathid, "at", &strval) == 0) {
3995 ++pathid;
3996 /* Start the search over */
3997 goto retry;
3998 }
3999 return (pathid);
4000 }
4001
4002 static path_id_t
xptpathid(const char * sim_name,int sim_unit,int sim_bus)4003 xptpathid(const char *sim_name, int sim_unit, int sim_bus)
4004 {
4005 path_id_t pathid;
4006 int i, dunit, val;
4007 char buf[32];
4008 const char *dname;
4009
4010 pathid = CAM_XPT_PATH_ID;
4011 snprintf(buf, sizeof(buf), "%s%d", sim_name, sim_unit);
4012 if (strcmp(buf, "xpt0") == 0 && sim_bus == 0)
4013 return (pathid);
4014 i = 0;
4015 while ((resource_find_match(&i, &dname, &dunit, "at", buf)) == 0) {
4016 if (strcmp(dname, "scbus")) {
4017 /* Avoid a bit of foot shooting. */
4018 continue;
4019 }
4020 if (dunit < 0) /* unwired?! */
4021 continue;
4022 if (resource_int_value("scbus", dunit, "bus", &val) == 0) {
4023 if (sim_bus == val) {
4024 pathid = dunit;
4025 break;
4026 }
4027 } else if (sim_bus == 0) {
4028 /* Unspecified matches bus 0 */
4029 pathid = dunit;
4030 break;
4031 } else {
4032 printf("Ambiguous scbus configuration for %s%d "
4033 "bus %d, cannot wire down. The kernel "
4034 "config entry for scbus%d should "
4035 "specify a controller bus.\n"
4036 "Scbus will be assigned dynamically.\n",
4037 sim_name, sim_unit, sim_bus, dunit);
4038 break;
4039 }
4040 }
4041
4042 if (pathid == CAM_XPT_PATH_ID)
4043 pathid = xptnextfreepathid();
4044 return (pathid);
4045 }
4046
4047 static const char *
xpt_async_string(u_int32_t async_code)4048 xpt_async_string(u_int32_t async_code)
4049 {
4050
4051 switch (async_code) {
4052 case AC_BUS_RESET: return ("AC_BUS_RESET");
4053 case AC_UNSOL_RESEL: return ("AC_UNSOL_RESEL");
4054 case AC_SCSI_AEN: return ("AC_SCSI_AEN");
4055 case AC_SENT_BDR: return ("AC_SENT_BDR");
4056 case AC_PATH_REGISTERED: return ("AC_PATH_REGISTERED");
4057 case AC_PATH_DEREGISTERED: return ("AC_PATH_DEREGISTERED");
4058 case AC_FOUND_DEVICE: return ("AC_FOUND_DEVICE");
4059 case AC_LOST_DEVICE: return ("AC_LOST_DEVICE");
4060 case AC_TRANSFER_NEG: return ("AC_TRANSFER_NEG");
4061 case AC_INQ_CHANGED: return ("AC_INQ_CHANGED");
4062 case AC_GETDEV_CHANGED: return ("AC_GETDEV_CHANGED");
4063 case AC_CONTRACT: return ("AC_CONTRACT");
4064 case AC_ADVINFO_CHANGED: return ("AC_ADVINFO_CHANGED");
4065 case AC_UNIT_ATTENTION: return ("AC_UNIT_ATTENTION");
4066 }
4067 return ("AC_UNKNOWN");
4068 }
4069
4070 static int
xpt_async_size(u_int32_t async_code)4071 xpt_async_size(u_int32_t async_code)
4072 {
4073
4074 switch (async_code) {
4075 case AC_BUS_RESET: return (0);
4076 case AC_UNSOL_RESEL: return (0);
4077 case AC_SCSI_AEN: return (0);
4078 case AC_SENT_BDR: return (0);
4079 case AC_PATH_REGISTERED: return (sizeof(struct ccb_pathinq));
4080 case AC_PATH_DEREGISTERED: return (0);
4081 case AC_FOUND_DEVICE: return (sizeof(struct ccb_getdev));
4082 case AC_LOST_DEVICE: return (0);
4083 case AC_TRANSFER_NEG: return (sizeof(struct ccb_trans_settings));
4084 case AC_INQ_CHANGED: return (0);
4085 case AC_GETDEV_CHANGED: return (0);
4086 case AC_CONTRACT: return (sizeof(struct ac_contract));
4087 case AC_ADVINFO_CHANGED: return (-1);
4088 case AC_UNIT_ATTENTION: return (sizeof(struct ccb_scsiio));
4089 }
4090 return (0);
4091 }
4092
4093 static int
xpt_async_process_dev(struct cam_ed * device,void * arg)4094 xpt_async_process_dev(struct cam_ed *device, void *arg)
4095 {
4096 union ccb *ccb = arg;
4097 struct cam_path *path = ccb->ccb_h.path;
4098 void *async_arg = ccb->casync.async_arg_ptr;
4099 u_int32_t async_code = ccb->casync.async_code;
4100 int relock;
4101
4102 if (path->device != device
4103 && path->device->lun_id != CAM_LUN_WILDCARD
4104 && device->lun_id != CAM_LUN_WILDCARD)
4105 return (1);
4106
4107 /*
4108 * The async callback could free the device.
4109 * If it is a broadcast async, it doesn't hold
4110 * device reference, so take our own reference.
4111 */
4112 xpt_acquire_device(device);
4113
4114 /*
4115 * If async for specific device is to be delivered to
4116 * the wildcard client, take the specific device lock.
4117 * XXX: We may need a way for client to specify it.
4118 */
4119 if ((device->lun_id == CAM_LUN_WILDCARD &&
4120 path->device->lun_id != CAM_LUN_WILDCARD) ||
4121 (device->target->target_id == CAM_TARGET_WILDCARD &&
4122 path->target->target_id != CAM_TARGET_WILDCARD) ||
4123 (device->target->bus->path_id == CAM_BUS_WILDCARD &&
4124 path->target->bus->path_id != CAM_BUS_WILDCARD)) {
4125 mtx_unlock(&device->device_mtx);
4126 xpt_path_lock(path);
4127 relock = 1;
4128 } else
4129 relock = 0;
4130
4131 (*(device->target->bus->xport->async))(async_code,
4132 device->target->bus, device->target, device, async_arg);
4133 xpt_async_bcast(&device->asyncs, async_code, path, async_arg);
4134
4135 if (relock) {
4136 xpt_path_unlock(path);
4137 mtx_lock(&device->device_mtx);
4138 }
4139 xpt_release_device(device);
4140 return (1);
4141 }
4142
4143 static int
xpt_async_process_tgt(struct cam_et * target,void * arg)4144 xpt_async_process_tgt(struct cam_et *target, void *arg)
4145 {
4146 union ccb *ccb = arg;
4147 struct cam_path *path = ccb->ccb_h.path;
4148
4149 if (path->target != target
4150 && path->target->target_id != CAM_TARGET_WILDCARD
4151 && target->target_id != CAM_TARGET_WILDCARD)
4152 return (1);
4153
4154 if (ccb->casync.async_code == AC_SENT_BDR) {
4155 /* Update our notion of when the last reset occurred */
4156 microtime(&target->last_reset);
4157 }
4158
4159 return (xptdevicetraverse(target, NULL, xpt_async_process_dev, ccb));
4160 }
4161
4162 static void
xpt_async_process(struct cam_periph * periph,union ccb * ccb)4163 xpt_async_process(struct cam_periph *periph, union ccb *ccb)
4164 {
4165 struct cam_eb *bus;
4166 struct cam_path *path;
4167 void *async_arg;
4168 u_int32_t async_code;
4169
4170 path = ccb->ccb_h.path;
4171 async_code = ccb->casync.async_code;
4172 async_arg = ccb->casync.async_arg_ptr;
4173 CAM_DEBUG(path, CAM_DEBUG_TRACE | CAM_DEBUG_INFO,
4174 ("xpt_async(%s)\n", xpt_async_string(async_code)));
4175 bus = path->bus;
4176
4177 if (async_code == AC_BUS_RESET) {
4178 /* Update our notion of when the last reset occurred */
4179 microtime(&bus->last_reset);
4180 }
4181
4182 xpttargettraverse(bus, NULL, xpt_async_process_tgt, ccb);
4183
4184 /*
4185 * If this wasn't a fully wildcarded async, tell all
4186 * clients that want all async events.
4187 */
4188 if (bus != xpt_periph->path->bus) {
4189 xpt_path_lock(xpt_periph->path);
4190 xpt_async_process_dev(xpt_periph->path->device, ccb);
4191 xpt_path_unlock(xpt_periph->path);
4192 }
4193
4194 if (path->device != NULL && path->device->lun_id != CAM_LUN_WILDCARD)
4195 xpt_release_devq(path, 1, TRUE);
4196 else
4197 xpt_release_simq(path->bus->sim, TRUE);
4198 if (ccb->casync.async_arg_size > 0)
4199 free(async_arg, M_CAMXPT);
4200 xpt_free_path(path);
4201 xpt_free_ccb(ccb);
4202 }
4203
4204 static void
xpt_async_bcast(struct async_list * async_head,u_int32_t async_code,struct cam_path * path,void * async_arg)4205 xpt_async_bcast(struct async_list *async_head,
4206 u_int32_t async_code,
4207 struct cam_path *path, void *async_arg)
4208 {
4209 struct async_node *cur_entry;
4210 int lock;
4211
4212 cur_entry = SLIST_FIRST(async_head);
4213 while (cur_entry != NULL) {
4214 struct async_node *next_entry;
4215 /*
4216 * Grab the next list entry before we call the current
4217 * entry's callback. This is because the callback function
4218 * can delete its async callback entry.
4219 */
4220 next_entry = SLIST_NEXT(cur_entry, links);
4221 if ((cur_entry->event_enable & async_code) != 0) {
4222 lock = cur_entry->event_lock;
4223 if (lock)
4224 CAM_SIM_LOCK(path->device->sim);
4225 cur_entry->callback(cur_entry->callback_arg,
4226 async_code, path,
4227 async_arg);
4228 if (lock)
4229 CAM_SIM_UNLOCK(path->device->sim);
4230 }
4231 cur_entry = next_entry;
4232 }
4233 }
4234
4235 void
xpt_async(u_int32_t async_code,struct cam_path * path,void * async_arg)4236 xpt_async(u_int32_t async_code, struct cam_path *path, void *async_arg)
4237 {
4238 union ccb *ccb;
4239 int size;
4240
4241 ccb = xpt_alloc_ccb_nowait();
4242 if (ccb == NULL) {
4243 xpt_print(path, "Can't allocate CCB to send %s\n",
4244 xpt_async_string(async_code));
4245 return;
4246 }
4247
4248 if (xpt_clone_path(&ccb->ccb_h.path, path) != CAM_REQ_CMP) {
4249 xpt_print(path, "Can't allocate path to send %s\n",
4250 xpt_async_string(async_code));
4251 xpt_free_ccb(ccb);
4252 return;
4253 }
4254 ccb->ccb_h.path->periph = NULL;
4255 ccb->ccb_h.func_code = XPT_ASYNC;
4256 ccb->ccb_h.cbfcnp = xpt_async_process;
4257 ccb->ccb_h.flags |= CAM_UNLOCKED;
4258 ccb->casync.async_code = async_code;
4259 ccb->casync.async_arg_size = 0;
4260 size = xpt_async_size(async_code);
4261 if (size > 0 && async_arg != NULL) {
4262 ccb->casync.async_arg_ptr = malloc(size, M_CAMXPT, M_NOWAIT);
4263 if (ccb->casync.async_arg_ptr == NULL) {
4264 xpt_print(path, "Can't allocate argument to send %s\n",
4265 xpt_async_string(async_code));
4266 xpt_free_path(ccb->ccb_h.path);
4267 xpt_free_ccb(ccb);
4268 return;
4269 }
4270 memcpy(ccb->casync.async_arg_ptr, async_arg, size);
4271 ccb->casync.async_arg_size = size;
4272 } else if (size < 0)
4273 ccb->casync.async_arg_size = size;
4274 if (path->device != NULL && path->device->lun_id != CAM_LUN_WILDCARD)
4275 xpt_freeze_devq(path, 1);
4276 else
4277 xpt_freeze_simq(path->bus->sim, 1);
4278 xpt_done(ccb);
4279 }
4280
4281 static void
xpt_dev_async_default(u_int32_t async_code,struct cam_eb * bus,struct cam_et * target,struct cam_ed * device,void * async_arg)4282 xpt_dev_async_default(u_int32_t async_code, struct cam_eb *bus,
4283 struct cam_et *target, struct cam_ed *device,
4284 void *async_arg)
4285 {
4286
4287 /*
4288 * We only need to handle events for real devices.
4289 */
4290 if (target->target_id == CAM_TARGET_WILDCARD
4291 || device->lun_id == CAM_LUN_WILDCARD)
4292 return;
4293
4294 printf("%s called\n", __func__);
4295 }
4296
4297 static uint32_t
xpt_freeze_devq_device(struct cam_ed * dev,u_int count)4298 xpt_freeze_devq_device(struct cam_ed *dev, u_int count)
4299 {
4300 struct cam_devq *devq;
4301 uint32_t freeze;
4302
4303 devq = dev->sim->devq;
4304 mtx_assert(&devq->send_mtx, MA_OWNED);
4305 CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE,
4306 ("xpt_freeze_devq_device(%d) %u->%u\n", count,
4307 dev->ccbq.queue.qfrozen_cnt, dev->ccbq.queue.qfrozen_cnt + count));
4308 freeze = (dev->ccbq.queue.qfrozen_cnt += count);
4309 /* Remove frozen device from sendq. */
4310 if (device_is_queued(dev))
4311 camq_remove(&devq->send_queue, dev->devq_entry.index);
4312 return (freeze);
4313 }
4314
4315 u_int32_t
xpt_freeze_devq(struct cam_path * path,u_int count)4316 xpt_freeze_devq(struct cam_path *path, u_int count)
4317 {
4318 struct cam_ed *dev = path->device;
4319 struct cam_devq *devq;
4320 uint32_t freeze;
4321
4322 devq = dev->sim->devq;
4323 mtx_lock(&devq->send_mtx);
4324 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_freeze_devq(%d)\n", count));
4325 freeze = xpt_freeze_devq_device(dev, count);
4326 mtx_unlock(&devq->send_mtx);
4327 return (freeze);
4328 }
4329
4330 u_int32_t
xpt_freeze_simq(struct cam_sim * sim,u_int count)4331 xpt_freeze_simq(struct cam_sim *sim, u_int count)
4332 {
4333 struct cam_devq *devq;
4334 uint32_t freeze;
4335
4336 devq = sim->devq;
4337 mtx_lock(&devq->send_mtx);
4338 freeze = (devq->send_queue.qfrozen_cnt += count);
4339 mtx_unlock(&devq->send_mtx);
4340 return (freeze);
4341 }
4342
4343 static void
xpt_release_devq_timeout(void * arg)4344 xpt_release_devq_timeout(void *arg)
4345 {
4346 struct cam_ed *dev;
4347 struct cam_devq *devq;
4348
4349 dev = (struct cam_ed *)arg;
4350 CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE, ("xpt_release_devq_timeout\n"));
4351 devq = dev->sim->devq;
4352 mtx_assert(&devq->send_mtx, MA_OWNED);
4353 if (xpt_release_devq_device(dev, /*count*/1, /*run_queue*/TRUE))
4354 xpt_run_devq(devq);
4355 }
4356
4357 void
xpt_release_devq(struct cam_path * path,u_int count,int run_queue)4358 xpt_release_devq(struct cam_path *path, u_int count, int run_queue)
4359 {
4360 struct cam_ed *dev;
4361 struct cam_devq *devq;
4362
4363 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_devq(%d, %d)\n",
4364 count, run_queue));
4365 dev = path->device;
4366 devq = dev->sim->devq;
4367 mtx_lock(&devq->send_mtx);
4368 if (xpt_release_devq_device(dev, count, run_queue))
4369 xpt_run_devq(dev->sim->devq);
4370 mtx_unlock(&devq->send_mtx);
4371 }
4372
4373 static int
xpt_release_devq_device(struct cam_ed * dev,u_int count,int run_queue)4374 xpt_release_devq_device(struct cam_ed *dev, u_int count, int run_queue)
4375 {
4376
4377 mtx_assert(&dev->sim->devq->send_mtx, MA_OWNED);
4378 CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE,
4379 ("xpt_release_devq_device(%d, %d) %u->%u\n", count, run_queue,
4380 dev->ccbq.queue.qfrozen_cnt, dev->ccbq.queue.qfrozen_cnt - count));
4381 if (count > dev->ccbq.queue.qfrozen_cnt) {
4382 #ifdef INVARIANTS
4383 printf("xpt_release_devq(): requested %u > present %u\n",
4384 count, dev->ccbq.queue.qfrozen_cnt);
4385 #endif
4386 count = dev->ccbq.queue.qfrozen_cnt;
4387 }
4388 dev->ccbq.queue.qfrozen_cnt -= count;
4389 if (dev->ccbq.queue.qfrozen_cnt == 0) {
4390 /*
4391 * No longer need to wait for a successful
4392 * command completion.
4393 */
4394 dev->flags &= ~CAM_DEV_REL_ON_COMPLETE;
4395 /*
4396 * Remove any timeouts that might be scheduled
4397 * to release this queue.
4398 */
4399 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) {
4400 callout_stop(&dev->callout);
4401 dev->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING;
4402 }
4403 /*
4404 * Now that we are unfrozen schedule the
4405 * device so any pending transactions are
4406 * run.
4407 */
4408 xpt_schedule_devq(dev->sim->devq, dev);
4409 } else
4410 run_queue = 0;
4411 return (run_queue);
4412 }
4413
4414 void
xpt_release_simq(struct cam_sim * sim,int run_queue)4415 xpt_release_simq(struct cam_sim *sim, int run_queue)
4416 {
4417 struct cam_devq *devq;
4418
4419 devq = sim->devq;
4420 mtx_lock(&devq->send_mtx);
4421 if (devq->send_queue.qfrozen_cnt <= 0) {
4422 #ifdef INVARIANTS
4423 printf("xpt_release_simq: requested 1 > present %u\n",
4424 devq->send_queue.qfrozen_cnt);
4425 #endif
4426 } else
4427 devq->send_queue.qfrozen_cnt--;
4428 if (devq->send_queue.qfrozen_cnt == 0) {
4429 /*
4430 * If there is a timeout scheduled to release this
4431 * sim queue, remove it. The queue frozen count is
4432 * already at 0.
4433 */
4434 if ((sim->flags & CAM_SIM_REL_TIMEOUT_PENDING) != 0){
4435 callout_stop(&sim->callout);
4436 sim->flags &= ~CAM_SIM_REL_TIMEOUT_PENDING;
4437 }
4438 if (run_queue) {
4439 /*
4440 * Now that we are unfrozen run the send queue.
4441 */
4442 xpt_run_devq(sim->devq);
4443 }
4444 }
4445 mtx_unlock(&devq->send_mtx);
4446 }
4447
4448 /*
4449 * XXX Appears to be unused.
4450 */
4451 static void
xpt_release_simq_timeout(void * arg)4452 xpt_release_simq_timeout(void *arg)
4453 {
4454 struct cam_sim *sim;
4455
4456 sim = (struct cam_sim *)arg;
4457 xpt_release_simq(sim, /* run_queue */ TRUE);
4458 }
4459
4460 void
xpt_done(union ccb * done_ccb)4461 xpt_done(union ccb *done_ccb)
4462 {
4463 struct cam_doneq *queue;
4464 int run, hash;
4465
4466 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_done\n"));
4467 if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) == 0)
4468 return;
4469
4470 hash = (done_ccb->ccb_h.path_id + done_ccb->ccb_h.target_id +
4471 done_ccb->ccb_h.target_lun) % cam_num_doneqs;
4472 queue = &cam_doneqs[hash];
4473 mtx_lock(&queue->cam_doneq_mtx);
4474 run = (queue->cam_doneq_sleep && STAILQ_EMPTY(&queue->cam_doneq));
4475 STAILQ_INSERT_TAIL(&queue->cam_doneq, &done_ccb->ccb_h, sim_links.stqe);
4476 done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX;
4477 mtx_unlock(&queue->cam_doneq_mtx);
4478 if (run)
4479 wakeup(&queue->cam_doneq);
4480 }
4481
4482 void
xpt_done_direct(union ccb * done_ccb)4483 xpt_done_direct(union ccb *done_ccb)
4484 {
4485
4486 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_done_direct\n"));
4487 if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) == 0)
4488 return;
4489
4490 xpt_done_process(&done_ccb->ccb_h);
4491 }
4492
4493 union ccb *
xpt_alloc_ccb()4494 xpt_alloc_ccb()
4495 {
4496 union ccb *new_ccb;
4497
4498 new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_WAITOK);
4499 return (new_ccb);
4500 }
4501
4502 union ccb *
xpt_alloc_ccb_nowait()4503 xpt_alloc_ccb_nowait()
4504 {
4505 union ccb *new_ccb;
4506
4507 new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_NOWAIT);
4508 return (new_ccb);
4509 }
4510
4511 void
xpt_free_ccb(union ccb * free_ccb)4512 xpt_free_ccb(union ccb *free_ccb)
4513 {
4514 free(free_ccb, M_CAMCCB);
4515 }
4516
4517
4518
4519 /* Private XPT functions */
4520
4521 /*
4522 * Get a CAM control block for the caller. Charge the structure to the device
4523 * referenced by the path. If we don't have sufficient resources to allocate
4524 * more ccbs, we return NULL.
4525 */
4526 static union ccb *
xpt_get_ccb_nowait(struct cam_periph * periph)4527 xpt_get_ccb_nowait(struct cam_periph *periph)
4528 {
4529 union ccb *new_ccb;
4530
4531 new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_NOWAIT);
4532 if (new_ccb == NULL)
4533 return (NULL);
4534 periph->periph_allocated++;
4535 cam_ccbq_take_opening(&periph->path->device->ccbq);
4536 return (new_ccb);
4537 }
4538
4539 static union ccb *
xpt_get_ccb(struct cam_periph * periph)4540 xpt_get_ccb(struct cam_periph *periph)
4541 {
4542 union ccb *new_ccb;
4543
4544 cam_periph_unlock(periph);
4545 new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_WAITOK);
4546 cam_periph_lock(periph);
4547 periph->periph_allocated++;
4548 cam_ccbq_take_opening(&periph->path->device->ccbq);
4549 return (new_ccb);
4550 }
4551
4552 union ccb *
cam_periph_getccb(struct cam_periph * periph,u_int32_t priority)4553 cam_periph_getccb(struct cam_periph *periph, u_int32_t priority)
4554 {
4555 struct ccb_hdr *ccb_h;
4556
4557 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("cam_periph_getccb\n"));
4558 cam_periph_assert(periph, MA_OWNED);
4559 while ((ccb_h = SLIST_FIRST(&periph->ccb_list)) == NULL ||
4560 ccb_h->pinfo.priority != priority) {
4561 if (priority < periph->immediate_priority) {
4562 periph->immediate_priority = priority;
4563 xpt_run_allocq(periph, 0);
4564 } else
4565 cam_periph_sleep(periph, &periph->ccb_list, PRIBIO,
4566 "cgticb", 0);
4567 }
4568 SLIST_REMOVE_HEAD(&periph->ccb_list, periph_links.sle);
4569 return ((union ccb *)ccb_h);
4570 }
4571
4572 static void
xpt_acquire_bus(struct cam_eb * bus)4573 xpt_acquire_bus(struct cam_eb *bus)
4574 {
4575
4576 xpt_lock_buses();
4577 bus->refcount++;
4578 xpt_unlock_buses();
4579 }
4580
4581 static void
xpt_release_bus(struct cam_eb * bus)4582 xpt_release_bus(struct cam_eb *bus)
4583 {
4584
4585 xpt_lock_buses();
4586 KASSERT(bus->refcount >= 1, ("bus->refcount >= 1"));
4587 if (--bus->refcount > 0) {
4588 xpt_unlock_buses();
4589 return;
4590 }
4591 TAILQ_REMOVE(&xsoftc.xpt_busses, bus, links);
4592 xsoftc.bus_generation++;
4593 xpt_unlock_buses();
4594 KASSERT(TAILQ_EMPTY(&bus->et_entries),
4595 ("destroying bus, but target list is not empty"));
4596 cam_sim_release(bus->sim);
4597 mtx_destroy(&bus->eb_mtx);
4598 free(bus, M_CAMXPT);
4599 }
4600
4601 static struct cam_et *
xpt_alloc_target(struct cam_eb * bus,target_id_t target_id)4602 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id)
4603 {
4604 struct cam_et *cur_target, *target;
4605
4606 mtx_assert(&xsoftc.xpt_topo_lock, MA_OWNED);
4607 mtx_assert(&bus->eb_mtx, MA_OWNED);
4608 target = (struct cam_et *)malloc(sizeof(*target), M_CAMXPT,
4609 M_NOWAIT|M_ZERO);
4610 if (target == NULL)
4611 return (NULL);
4612
4613 TAILQ_INIT(&target->ed_entries);
4614 target->bus = bus;
4615 target->target_id = target_id;
4616 target->refcount = 1;
4617 target->generation = 0;
4618 target->luns = NULL;
4619 mtx_init(&target->luns_mtx, "CAM LUNs lock", NULL, MTX_DEF);
4620 timevalclear(&target->last_reset);
4621 /*
4622 * Hold a reference to our parent bus so it
4623 * will not go away before we do.
4624 */
4625 bus->refcount++;
4626
4627 /* Insertion sort into our bus's target list */
4628 cur_target = TAILQ_FIRST(&bus->et_entries);
4629 while (cur_target != NULL && cur_target->target_id < target_id)
4630 cur_target = TAILQ_NEXT(cur_target, links);
4631 if (cur_target != NULL) {
4632 TAILQ_INSERT_BEFORE(cur_target, target, links);
4633 } else {
4634 TAILQ_INSERT_TAIL(&bus->et_entries, target, links);
4635 }
4636 bus->generation++;
4637 return (target);
4638 }
4639
4640 static void
xpt_acquire_target(struct cam_et * target)4641 xpt_acquire_target(struct cam_et *target)
4642 {
4643 struct cam_eb *bus = target->bus;
4644
4645 mtx_lock(&bus->eb_mtx);
4646 target->refcount++;
4647 mtx_unlock(&bus->eb_mtx);
4648 }
4649
4650 static void
xpt_release_target(struct cam_et * target)4651 xpt_release_target(struct cam_et *target)
4652 {
4653 struct cam_eb *bus = target->bus;
4654
4655 mtx_lock(&bus->eb_mtx);
4656 if (--target->refcount > 0) {
4657 mtx_unlock(&bus->eb_mtx);
4658 return;
4659 }
4660 TAILQ_REMOVE(&bus->et_entries, target, links);
4661 bus->generation++;
4662 mtx_unlock(&bus->eb_mtx);
4663 KASSERT(TAILQ_EMPTY(&target->ed_entries),
4664 ("destroying target, but device list is not empty"));
4665 xpt_release_bus(bus);
4666 mtx_destroy(&target->luns_mtx);
4667 if (target->luns)
4668 free(target->luns, M_CAMXPT);
4669 free(target, M_CAMXPT);
4670 }
4671
4672 static struct cam_ed *
xpt_alloc_device_default(struct cam_eb * bus,struct cam_et * target,lun_id_t lun_id)4673 xpt_alloc_device_default(struct cam_eb *bus, struct cam_et *target,
4674 lun_id_t lun_id)
4675 {
4676 struct cam_ed *device;
4677
4678 device = xpt_alloc_device(bus, target, lun_id);
4679 if (device == NULL)
4680 return (NULL);
4681
4682 device->mintags = 1;
4683 device->maxtags = 1;
4684 return (device);
4685 }
4686
4687 static void
xpt_destroy_device(void * context,int pending)4688 xpt_destroy_device(void *context, int pending)
4689 {
4690 struct cam_ed *device = context;
4691
4692 mtx_lock(&device->device_mtx);
4693 mtx_destroy(&device->device_mtx);
4694 free(device, M_CAMDEV);
4695 }
4696
4697 struct cam_ed *
xpt_alloc_device(struct cam_eb * bus,struct cam_et * target,lun_id_t lun_id)4698 xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, lun_id_t lun_id)
4699 {
4700 struct cam_ed *cur_device, *device;
4701 struct cam_devq *devq;
4702 cam_status status;
4703
4704 mtx_assert(&bus->eb_mtx, MA_OWNED);
4705 /* Make space for us in the device queue on our bus */
4706 devq = bus->sim->devq;
4707 mtx_lock(&devq->send_mtx);
4708 status = cam_devq_resize(devq, devq->send_queue.array_size + 1);
4709 mtx_unlock(&devq->send_mtx);
4710 if (status != CAM_REQ_CMP)
4711 return (NULL);
4712
4713 device = (struct cam_ed *)malloc(sizeof(*device),
4714 M_CAMDEV, M_NOWAIT|M_ZERO);
4715 if (device == NULL)
4716 return (NULL);
4717
4718 cam_init_pinfo(&device->devq_entry);
4719 device->target = target;
4720 device->lun_id = lun_id;
4721 device->sim = bus->sim;
4722 if (cam_ccbq_init(&device->ccbq,
4723 bus->sim->max_dev_openings) != 0) {
4724 free(device, M_CAMDEV);
4725 return (NULL);
4726 }
4727 SLIST_INIT(&device->asyncs);
4728 SLIST_INIT(&device->periphs);
4729 device->generation = 0;
4730 device->flags = CAM_DEV_UNCONFIGURED;
4731 device->tag_delay_count = 0;
4732 device->tag_saved_openings = 0;
4733 device->refcount = 1;
4734 mtx_init(&device->device_mtx, "CAM device lock", NULL, MTX_DEF);
4735 callout_init_mtx(&device->callout, &devq->send_mtx, 0);
4736 TASK_INIT(&device->device_destroy_task, 0, xpt_destroy_device, device);
4737 /*
4738 * Hold a reference to our parent bus so it
4739 * will not go away before we do.
4740 */
4741 target->refcount++;
4742
4743 cur_device = TAILQ_FIRST(&target->ed_entries);
4744 while (cur_device != NULL && cur_device->lun_id < lun_id)
4745 cur_device = TAILQ_NEXT(cur_device, links);
4746 if (cur_device != NULL)
4747 TAILQ_INSERT_BEFORE(cur_device, device, links);
4748 else
4749 TAILQ_INSERT_TAIL(&target->ed_entries, device, links);
4750 target->generation++;
4751 return (device);
4752 }
4753
4754 void
xpt_acquire_device(struct cam_ed * device)4755 xpt_acquire_device(struct cam_ed *device)
4756 {
4757 struct cam_eb *bus = device->target->bus;
4758
4759 mtx_lock(&bus->eb_mtx);
4760 device->refcount++;
4761 mtx_unlock(&bus->eb_mtx);
4762 }
4763
4764 void
xpt_release_device(struct cam_ed * device)4765 xpt_release_device(struct cam_ed *device)
4766 {
4767 struct cam_eb *bus = device->target->bus;
4768 struct cam_devq *devq;
4769
4770 mtx_lock(&bus->eb_mtx);
4771 if (--device->refcount > 0) {
4772 mtx_unlock(&bus->eb_mtx);
4773 return;
4774 }
4775
4776 TAILQ_REMOVE(&device->target->ed_entries, device,links);
4777 device->target->generation++;
4778 mtx_unlock(&bus->eb_mtx);
4779
4780 /* Release our slot in the devq */
4781 devq = bus->sim->devq;
4782 mtx_lock(&devq->send_mtx);
4783 cam_devq_resize(devq, devq->send_queue.array_size - 1);
4784 mtx_unlock(&devq->send_mtx);
4785
4786 KASSERT(SLIST_EMPTY(&device->periphs),
4787 ("destroying device, but periphs list is not empty"));
4788 KASSERT(device->devq_entry.index == CAM_UNQUEUED_INDEX,
4789 ("destroying device while still queued for ccbs"));
4790
4791 if ((device->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0)
4792 callout_stop(&device->callout);
4793
4794 xpt_release_target(device->target);
4795
4796 cam_ccbq_fini(&device->ccbq);
4797 /*
4798 * Free allocated memory. free(9) does nothing if the
4799 * supplied pointer is NULL, so it is safe to call without
4800 * checking.
4801 */
4802 free(device->supported_vpds, M_CAMXPT);
4803 free(device->device_id, M_CAMXPT);
4804 free(device->ext_inq, M_CAMXPT);
4805 free(device->physpath, M_CAMXPT);
4806 free(device->rcap_buf, M_CAMXPT);
4807 free(device->serial_num, M_CAMXPT);
4808 taskqueue_enqueue(xsoftc.xpt_taskq, &device->device_destroy_task);
4809 }
4810
4811 u_int32_t
xpt_dev_ccbq_resize(struct cam_path * path,int newopenings)4812 xpt_dev_ccbq_resize(struct cam_path *path, int newopenings)
4813 {
4814 int result;
4815 struct cam_ed *dev;
4816
4817 dev = path->device;
4818 mtx_lock(&dev->sim->devq->send_mtx);
4819 result = cam_ccbq_resize(&dev->ccbq, newopenings);
4820 mtx_unlock(&dev->sim->devq->send_mtx);
4821 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
4822 || (dev->inq_flags & SID_CmdQue) != 0)
4823 dev->tag_saved_openings = newopenings;
4824 return (result);
4825 }
4826
4827 static struct cam_eb *
xpt_find_bus(path_id_t path_id)4828 xpt_find_bus(path_id_t path_id)
4829 {
4830 struct cam_eb *bus;
4831
4832 xpt_lock_buses();
4833 for (bus = TAILQ_FIRST(&xsoftc.xpt_busses);
4834 bus != NULL;
4835 bus = TAILQ_NEXT(bus, links)) {
4836 if (bus->path_id == path_id) {
4837 bus->refcount++;
4838 break;
4839 }
4840 }
4841 xpt_unlock_buses();
4842 return (bus);
4843 }
4844
4845 static struct cam_et *
xpt_find_target(struct cam_eb * bus,target_id_t target_id)4846 xpt_find_target(struct cam_eb *bus, target_id_t target_id)
4847 {
4848 struct cam_et *target;
4849
4850 mtx_assert(&bus->eb_mtx, MA_OWNED);
4851 for (target = TAILQ_FIRST(&bus->et_entries);
4852 target != NULL;
4853 target = TAILQ_NEXT(target, links)) {
4854 if (target->target_id == target_id) {
4855 target->refcount++;
4856 break;
4857 }
4858 }
4859 return (target);
4860 }
4861
4862 static struct cam_ed *
xpt_find_device(struct cam_et * target,lun_id_t lun_id)4863 xpt_find_device(struct cam_et *target, lun_id_t lun_id)
4864 {
4865 struct cam_ed *device;
4866
4867 mtx_assert(&target->bus->eb_mtx, MA_OWNED);
4868 for (device = TAILQ_FIRST(&target->ed_entries);
4869 device != NULL;
4870 device = TAILQ_NEXT(device, links)) {
4871 if (device->lun_id == lun_id) {
4872 device->refcount++;
4873 break;
4874 }
4875 }
4876 return (device);
4877 }
4878
4879 void
xpt_start_tags(struct cam_path * path)4880 xpt_start_tags(struct cam_path *path)
4881 {
4882 struct ccb_relsim crs;
4883 struct cam_ed *device;
4884 struct cam_sim *sim;
4885 int newopenings;
4886
4887 device = path->device;
4888 sim = path->bus->sim;
4889 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT;
4890 xpt_freeze_devq(path, /*count*/1);
4891 device->inq_flags |= SID_CmdQue;
4892 if (device->tag_saved_openings != 0)
4893 newopenings = device->tag_saved_openings;
4894 else
4895 newopenings = min(device->maxtags,
4896 sim->max_tagged_dev_openings);
4897 xpt_dev_ccbq_resize(path, newopenings);
4898 xpt_async(AC_GETDEV_CHANGED, path, NULL);
4899 xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL);
4900 crs.ccb_h.func_code = XPT_REL_SIMQ;
4901 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY;
4902 crs.openings
4903 = crs.release_timeout
4904 = crs.qfrozen_cnt
4905 = 0;
4906 xpt_action((union ccb *)&crs);
4907 }
4908
4909 void
xpt_stop_tags(struct cam_path * path)4910 xpt_stop_tags(struct cam_path *path)
4911 {
4912 struct ccb_relsim crs;
4913 struct cam_ed *device;
4914 struct cam_sim *sim;
4915
4916 device = path->device;
4917 sim = path->bus->sim;
4918 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT;
4919 device->tag_delay_count = 0;
4920 xpt_freeze_devq(path, /*count*/1);
4921 device->inq_flags &= ~SID_CmdQue;
4922 xpt_dev_ccbq_resize(path, sim->max_dev_openings);
4923 xpt_async(AC_GETDEV_CHANGED, path, NULL);
4924 xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL);
4925 crs.ccb_h.func_code = XPT_REL_SIMQ;
4926 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY;
4927 crs.openings
4928 = crs.release_timeout
4929 = crs.qfrozen_cnt
4930 = 0;
4931 xpt_action((union ccb *)&crs);
4932 }
4933
4934 static void
xpt_boot_delay(void * arg)4935 xpt_boot_delay(void *arg)
4936 {
4937
4938 xpt_release_boot();
4939 }
4940
4941 static void
xpt_config(void * arg)4942 xpt_config(void *arg)
4943 {
4944 /*
4945 * Now that interrupts are enabled, go find our devices
4946 */
4947 if (taskqueue_start_threads(&xsoftc.xpt_taskq, 1, PRIBIO, "CAM taskq"))
4948 printf("xpt_config: failed to create taskqueue thread.\n");
4949
4950 /* Setup debugging path */
4951 if (cam_dflags != CAM_DEBUG_NONE) {
4952 if (xpt_create_path(&cam_dpath, NULL,
4953 CAM_DEBUG_BUS, CAM_DEBUG_TARGET,
4954 CAM_DEBUG_LUN) != CAM_REQ_CMP) {
4955 printf("xpt_config: xpt_create_path() failed for debug"
4956 " target %d:%d:%d, debugging disabled\n",
4957 CAM_DEBUG_BUS, CAM_DEBUG_TARGET, CAM_DEBUG_LUN);
4958 cam_dflags = CAM_DEBUG_NONE;
4959 }
4960 } else
4961 cam_dpath = NULL;
4962
4963 periphdriver_init(1);
4964 xpt_hold_boot();
4965 callout_init(&xsoftc.boot_callout, 1);
4966 callout_reset_sbt(&xsoftc.boot_callout, SBT_1MS * xsoftc.boot_delay, 0,
4967 xpt_boot_delay, NULL, 0);
4968 /* Fire up rescan thread. */
4969 if (kproc_kthread_add(xpt_scanner_thread, NULL, &cam_proc, NULL, 0, 0,
4970 "cam", "scanner")) {
4971 printf("xpt_config: failed to create rescan thread.\n");
4972 }
4973 }
4974
4975 void
xpt_hold_boot(void)4976 xpt_hold_boot(void)
4977 {
4978 xpt_lock_buses();
4979 xsoftc.buses_to_config++;
4980 xpt_unlock_buses();
4981 }
4982
4983 void
xpt_release_boot(void)4984 xpt_release_boot(void)
4985 {
4986 xpt_lock_buses();
4987 xsoftc.buses_to_config--;
4988 if (xsoftc.buses_to_config == 0 && xsoftc.buses_config_done == 0) {
4989 struct xpt_task *task;
4990
4991 xsoftc.buses_config_done = 1;
4992 xpt_unlock_buses();
4993 /* Call manually because we don't have any busses */
4994 task = malloc(sizeof(struct xpt_task), M_CAMXPT, M_NOWAIT);
4995 if (task != NULL) {
4996 TASK_INIT(&task->task, 0, xpt_finishconfig_task, task);
4997 taskqueue_enqueue(taskqueue_thread, &task->task);
4998 }
4999 } else
5000 xpt_unlock_buses();
5001 }
5002
5003 /*
5004 * If the given device only has one peripheral attached to it, and if that
5005 * peripheral is the passthrough driver, announce it. This insures that the
5006 * user sees some sort of announcement for every peripheral in their system.
5007 */
5008 static int
xptpassannouncefunc(struct cam_ed * device,void * arg)5009 xptpassannouncefunc(struct cam_ed *device, void *arg)
5010 {
5011 struct cam_periph *periph;
5012 int i;
5013
5014 for (periph = SLIST_FIRST(&device->periphs), i = 0; periph != NULL;
5015 periph = SLIST_NEXT(periph, periph_links), i++);
5016
5017 periph = SLIST_FIRST(&device->periphs);
5018 if ((i == 1)
5019 && (strncmp(periph->periph_name, "pass", 4) == 0))
5020 xpt_announce_periph(periph, NULL);
5021
5022 return(1);
5023 }
5024
5025 static void
xpt_finishconfig_task(void * context,int pending)5026 xpt_finishconfig_task(void *context, int pending)
5027 {
5028
5029 periphdriver_init(2);
5030 /*
5031 * Check for devices with no "standard" peripheral driver
5032 * attached. For any devices like that, announce the
5033 * passthrough driver so the user will see something.
5034 */
5035 if (!bootverbose)
5036 xpt_for_all_devices(xptpassannouncefunc, NULL);
5037
5038 /* Release our hook so that the boot can continue. */
5039 config_intrhook_disestablish(xsoftc.xpt_config_hook);
5040 free(xsoftc.xpt_config_hook, M_CAMXPT);
5041 xsoftc.xpt_config_hook = NULL;
5042
5043 free(context, M_CAMXPT);
5044 }
5045
5046 cam_status
xpt_register_async(int event,ac_callback_t * cbfunc,void * cbarg,struct cam_path * path)5047 xpt_register_async(int event, ac_callback_t *cbfunc, void *cbarg,
5048 struct cam_path *path)
5049 {
5050 struct ccb_setasync csa;
5051 cam_status status;
5052 int xptpath = 0;
5053
5054 if (path == NULL) {
5055 status = xpt_create_path(&path, /*periph*/NULL, CAM_XPT_PATH_ID,
5056 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
5057 if (status != CAM_REQ_CMP)
5058 return (status);
5059 xpt_path_lock(path);
5060 xptpath = 1;
5061 }
5062
5063 xpt_setup_ccb(&csa.ccb_h, path, CAM_PRIORITY_NORMAL);
5064 csa.ccb_h.func_code = XPT_SASYNC_CB;
5065 csa.event_enable = event;
5066 csa.callback = cbfunc;
5067 csa.callback_arg = cbarg;
5068 xpt_action((union ccb *)&csa);
5069 status = csa.ccb_h.status;
5070
5071 if (xptpath) {
5072 xpt_path_unlock(path);
5073 xpt_free_path(path);
5074 }
5075
5076 if ((status == CAM_REQ_CMP) &&
5077 (csa.event_enable & AC_FOUND_DEVICE)) {
5078 /*
5079 * Get this peripheral up to date with all
5080 * the currently existing devices.
5081 */
5082 xpt_for_all_devices(xptsetasyncfunc, &csa);
5083 }
5084 if ((status == CAM_REQ_CMP) &&
5085 (csa.event_enable & AC_PATH_REGISTERED)) {
5086 /*
5087 * Get this peripheral up to date with all
5088 * the currently existing busses.
5089 */
5090 xpt_for_all_busses(xptsetasyncbusfunc, &csa);
5091 }
5092
5093 return (status);
5094 }
5095
5096 static void
xptaction(struct cam_sim * sim,union ccb * work_ccb)5097 xptaction(struct cam_sim *sim, union ccb *work_ccb)
5098 {
5099 CAM_DEBUG(work_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xptaction\n"));
5100
5101 switch (work_ccb->ccb_h.func_code) {
5102 /* Common cases first */
5103 case XPT_PATH_INQ: /* Path routing inquiry */
5104 {
5105 struct ccb_pathinq *cpi;
5106
5107 cpi = &work_ccb->cpi;
5108 cpi->version_num = 1; /* XXX??? */
5109 cpi->hba_inquiry = 0;
5110 cpi->target_sprt = 0;
5111 cpi->hba_misc = 0;
5112 cpi->hba_eng_cnt = 0;
5113 cpi->max_target = 0;
5114 cpi->max_lun = 0;
5115 cpi->initiator_id = 0;
5116 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
5117 strncpy(cpi->hba_vid, "", HBA_IDLEN);
5118 strncpy(cpi->dev_name, sim->sim_name, DEV_IDLEN);
5119 cpi->unit_number = sim->unit_number;
5120 cpi->bus_id = sim->bus_id;
5121 cpi->base_transfer_speed = 0;
5122 cpi->protocol = PROTO_UNSPECIFIED;
5123 cpi->protocol_version = PROTO_VERSION_UNSPECIFIED;
5124 cpi->transport = XPORT_UNSPECIFIED;
5125 cpi->transport_version = XPORT_VERSION_UNSPECIFIED;
5126 cpi->ccb_h.status = CAM_REQ_CMP;
5127 xpt_done(work_ccb);
5128 break;
5129 }
5130 default:
5131 work_ccb->ccb_h.status = CAM_REQ_INVALID;
5132 xpt_done(work_ccb);
5133 break;
5134 }
5135 }
5136
5137 /*
5138 * The xpt as a "controller" has no interrupt sources, so polling
5139 * is a no-op.
5140 */
5141 static void
xptpoll(struct cam_sim * sim)5142 xptpoll(struct cam_sim *sim)
5143 {
5144 }
5145
5146 void
xpt_lock_buses(void)5147 xpt_lock_buses(void)
5148 {
5149 mtx_lock(&xsoftc.xpt_topo_lock);
5150 }
5151
5152 void
xpt_unlock_buses(void)5153 xpt_unlock_buses(void)
5154 {
5155 mtx_unlock(&xsoftc.xpt_topo_lock);
5156 }
5157
5158 struct mtx *
xpt_path_mtx(struct cam_path * path)5159 xpt_path_mtx(struct cam_path *path)
5160 {
5161 return (&path->device->device_mtx);
5162 }
5163
5164 static void
xpt_done_process(struct ccb_hdr * ccb_h)5165 xpt_done_process(struct ccb_hdr *ccb_h)
5166 {
5167 struct cam_sim *sim;
5168 struct cam_devq *devq;
5169 struct mtx *mtx = NULL;
5170
5171 if (ccb_h->flags & CAM_HIGH_POWER) {
5172 struct highpowerlist *hphead;
5173 struct cam_ed *device;
5174
5175 mtx_lock(&xsoftc.xpt_highpower_lock);
5176 hphead = &xsoftc.highpowerq;
5177
5178 device = STAILQ_FIRST(hphead);
5179
5180 /*
5181 * Increment the count since this command is done.
5182 */
5183 xsoftc.num_highpower++;
5184
5185 /*
5186 * Any high powered commands queued up?
5187 */
5188 if (device != NULL) {
5189
5190 STAILQ_REMOVE_HEAD(hphead, highpowerq_entry);
5191 mtx_unlock(&xsoftc.xpt_highpower_lock);
5192
5193 mtx_lock(&device->sim->devq->send_mtx);
5194 xpt_release_devq_device(device,
5195 /*count*/1, /*runqueue*/TRUE);
5196 mtx_unlock(&device->sim->devq->send_mtx);
5197 } else
5198 mtx_unlock(&xsoftc.xpt_highpower_lock);
5199 }
5200
5201 sim = ccb_h->path->bus->sim;
5202
5203 if (ccb_h->status & CAM_RELEASE_SIMQ) {
5204 xpt_release_simq(sim, /*run_queue*/FALSE);
5205 ccb_h->status &= ~CAM_RELEASE_SIMQ;
5206 }
5207
5208 if ((ccb_h->flags & CAM_DEV_QFRZDIS)
5209 && (ccb_h->status & CAM_DEV_QFRZN)) {
5210 xpt_release_devq(ccb_h->path, /*count*/1, /*run_queue*/TRUE);
5211 ccb_h->status &= ~CAM_DEV_QFRZN;
5212 }
5213
5214 devq = sim->devq;
5215 if ((ccb_h->func_code & XPT_FC_USER_CCB) == 0) {
5216 struct cam_ed *dev = ccb_h->path->device;
5217
5218 mtx_lock(&devq->send_mtx);
5219 devq->send_active--;
5220 devq->send_openings++;
5221 cam_ccbq_ccb_done(&dev->ccbq, (union ccb *)ccb_h);
5222
5223 if (((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0
5224 && (dev->ccbq.dev_active == 0))) {
5225 dev->flags &= ~CAM_DEV_REL_ON_QUEUE_EMPTY;
5226 xpt_release_devq_device(dev, /*count*/1,
5227 /*run_queue*/FALSE);
5228 }
5229
5230 if (((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0
5231 && (ccb_h->status&CAM_STATUS_MASK) != CAM_REQUEUE_REQ)) {
5232 dev->flags &= ~CAM_DEV_REL_ON_COMPLETE;
5233 xpt_release_devq_device(dev, /*count*/1,
5234 /*run_queue*/FALSE);
5235 }
5236
5237 if (!device_is_queued(dev))
5238 (void)xpt_schedule_devq(devq, dev);
5239 xpt_run_devq(devq);
5240 mtx_unlock(&devq->send_mtx);
5241
5242 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0) {
5243 mtx = xpt_path_mtx(ccb_h->path);
5244 mtx_lock(mtx);
5245
5246 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
5247 && (--dev->tag_delay_count == 0))
5248 xpt_start_tags(ccb_h->path);
5249 }
5250 }
5251
5252 if ((ccb_h->flags & CAM_UNLOCKED) == 0) {
5253 if (mtx == NULL) {
5254 mtx = xpt_path_mtx(ccb_h->path);
5255 mtx_lock(mtx);
5256 }
5257 } else {
5258 if (mtx != NULL) {
5259 mtx_unlock(mtx);
5260 mtx = NULL;
5261 }
5262 }
5263
5264 /* Call the peripheral driver's callback */
5265 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX;
5266 (*ccb_h->cbfcnp)(ccb_h->path->periph, (union ccb *)ccb_h);
5267 if (mtx != NULL)
5268 mtx_unlock(mtx);
5269 }
5270
5271 void
xpt_done_td(void * arg)5272 xpt_done_td(void *arg)
5273 {
5274 struct cam_doneq *queue = arg;
5275 struct ccb_hdr *ccb_h;
5276 STAILQ_HEAD(, ccb_hdr) doneq;
5277
5278 STAILQ_INIT(&doneq);
5279 mtx_lock(&queue->cam_doneq_mtx);
5280 while (1) {
5281 while (STAILQ_EMPTY(&queue->cam_doneq)) {
5282 queue->cam_doneq_sleep = 1;
5283 msleep(&queue->cam_doneq, &queue->cam_doneq_mtx,
5284 PRIBIO, "-", 0);
5285 queue->cam_doneq_sleep = 0;
5286 }
5287 STAILQ_CONCAT(&doneq, &queue->cam_doneq);
5288 mtx_unlock(&queue->cam_doneq_mtx);
5289
5290 THREAD_NO_SLEEPING();
5291 while ((ccb_h = STAILQ_FIRST(&doneq)) != NULL) {
5292 STAILQ_REMOVE_HEAD(&doneq, sim_links.stqe);
5293 xpt_done_process(ccb_h);
5294 }
5295 THREAD_SLEEPING_OK();
5296
5297 mtx_lock(&queue->cam_doneq_mtx);
5298 }
5299 }
5300
5301 static void
camisr_runqueue(void)5302 camisr_runqueue(void)
5303 {
5304 struct ccb_hdr *ccb_h;
5305 struct cam_doneq *queue;
5306 int i;
5307
5308 /* Process global queues. */
5309 for (i = 0; i < cam_num_doneqs; i++) {
5310 queue = &cam_doneqs[i];
5311 mtx_lock(&queue->cam_doneq_mtx);
5312 while ((ccb_h = STAILQ_FIRST(&queue->cam_doneq)) != NULL) {
5313 STAILQ_REMOVE_HEAD(&queue->cam_doneq, sim_links.stqe);
5314 mtx_unlock(&queue->cam_doneq_mtx);
5315 xpt_done_process(ccb_h);
5316 mtx_lock(&queue->cam_doneq_mtx);
5317 }
5318 mtx_unlock(&queue->cam_doneq_mtx);
5319 }
5320 }
5321