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388705e4 MD |
1 | /*- |
2 | * Copyright (c) 2007 Scott Long | |
3 | * All rights reserved. | |
4 | * | |
5 | * Redistribution and use in source and binary forms, with or without | |
6 | * modification, are permitted provided that the following conditions | |
7 | * are met: | |
8 | * 1. Redistributions of source code must retain the above copyright | |
9 | * notice, this list of conditions, and the following disclaimer, | |
10 | * without modification, immediately at the beginning of the file. | |
11 | * 2. The name of the author may not be used to endorse or promote products | |
12 | * derived from this software without specific prior written permission. | |
13 | * | |
14 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND | |
15 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
16 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
17 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR | |
18 | * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
19 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
20 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
21 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
22 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
23 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
24 | * SUCH DAMAGE. | |
25 | */ | |
26 | ||
27 | /* | |
28 | * scsi_sg peripheral driver. This driver is meant to implement the Linux | |
29 | * SG passthrough interface for SCSI. | |
30 | */ | |
31 | ||
388705e4 MD |
32 | #include <sys/param.h> |
33 | #include <sys/systm.h> | |
34 | #include <sys/kernel.h> | |
35 | #include <sys/types.h> | |
36 | #include <sys/bio.h> | |
857fcb57 MD |
37 | #include <sys/caps.h> |
38 | #include <sys/conf.h> | |
388705e4 MD |
39 | #include <sys/malloc.h> |
40 | #include <sys/fcntl.h> | |
388705e4 MD |
41 | #include <sys/errno.h> |
42 | #include <sys/devicestat.h> | |
43 | #include <sys/proc.h> | |
44 | #include <sys/uio.h> | |
45 | #include <sys/device.h> | |
46 | #include <sys/sysmsg.h> | |
47 | ||
48 | #include "../cam.h" | |
49 | #include "../cam_ccb.h" | |
50 | #include "../cam_periph.h" | |
51 | #include "../cam_queue.h" | |
52 | #include "../cam_xpt_periph.h" | |
53 | #include "../cam_debug.h" | |
54 | #include "../cam_sim.h" | |
55 | ||
388705e4 MD |
56 | #include "scsi_all.h" |
57 | #include "scsi_message.h" | |
58 | #include "scsi_sg.h" | |
59 | ||
60 | typedef enum { | |
61 | SG_FLAG_OPEN = 0x01, | |
62 | SG_FLAG_LOCKED = 0x02, | |
63 | SG_FLAG_INVALID = 0x04 | |
64 | } sg_flags; | |
65 | ||
66 | typedef enum { | |
67 | SG_STATE_NORMAL | |
68 | } sg_state; | |
69 | ||
70 | typedef enum { | |
71 | SG_RDWR_FREE, | |
72 | SG_RDWR_INPROG, | |
73 | SG_RDWR_DONE | |
74 | } sg_rdwr_state; | |
75 | ||
76 | typedef enum { | |
a9f09b75 | 77 | SG_CCB_POLLED, |
388705e4 MD |
78 | SG_CCB_RDWR_IO, |
79 | SG_CCB_WAITING | |
80 | } sg_ccb_types; | |
81 | ||
82 | #define ccb_type ppriv_field0 | |
83 | #define ccb_rdwr ppriv_ptr1 | |
84 | ||
85 | struct sg_rdwr { | |
86 | TAILQ_ENTRY(sg_rdwr) rdwr_link; | |
87 | int tag; | |
88 | int state; | |
89 | int buf_len; | |
90 | char *buf; | |
91 | union ccb *ccb; | |
92 | union { | |
93 | struct sg_header hdr; | |
94 | struct sg_io_hdr io_hdr; | |
95 | } hdr; | |
96 | }; | |
97 | ||
98 | struct sg_softc { | |
99 | sg_state state; | |
100 | sg_flags flags; | |
101 | struct devstat device_stats; | |
102 | TAILQ_HEAD(, sg_rdwr) rdwr_done; | |
103 | cdev_t dev; | |
104 | int sg_timeout; | |
105 | int sg_user_timeout; | |
106 | uint8_t pd_type; | |
107 | union ccb saved_ccb; | |
108 | }; | |
109 | ||
110 | static d_open_t sgopen; | |
111 | static d_close_t sgclose; | |
112 | static d_ioctl_t sgioctl; | |
113 | static d_write_t sgwrite; | |
114 | static d_read_t sgread; | |
115 | ||
116 | static periph_init_t sginit; | |
117 | static periph_ctor_t sgregister; | |
118 | static periph_oninv_t sgoninvalidate; | |
119 | static periph_dtor_t sgcleanup; | |
120 | static periph_start_t sgstart; | |
121 | static void sgasync(void *callback_arg, uint32_t code, | |
122 | struct cam_path *path, void *arg); | |
123 | static void sgdone(struct cam_periph *periph, union ccb *done_ccb); | |
124 | static int sgsendccb(struct cam_periph *periph, union ccb *ccb); | |
125 | static int sgsendrdwr(struct cam_periph *periph, union ccb *ccb); | |
126 | static int sgerror(union ccb *ccb, uint32_t cam_flags, | |
127 | uint32_t sense_flags); | |
128 | static void sg_scsiio_status(struct ccb_scsiio *csio, | |
129 | u_short *hoststat, u_short *drvstat); | |
130 | ||
131 | static int scsi_group_len(u_char cmd); | |
132 | ||
133 | static struct periph_driver sgdriver = | |
134 | { | |
135 | sginit, "sg", | |
136 | TAILQ_HEAD_INITIALIZER(sgdriver.units), /* gen */ 0 | |
137 | }; | |
138 | PERIPHDRIVER_DECLARE(sg, sgdriver); | |
139 | ||
140 | static struct dev_ops sg_ops = { | |
0c4341b9 | 141 | { "sg", 0, D_DISK | D_MPSAFE }, |
388705e4 MD |
142 | .d_open = sgopen, |
143 | .d_close = sgclose, | |
144 | .d_read = sgread, | |
145 | .d_write = sgwrite, | |
146 | .d_ioctl = sgioctl | |
147 | }; | |
148 | ||
149 | static int sg_version = 30125; | |
150 | ||
151 | static void | |
152 | sginit(void) | |
153 | { | |
154 | cam_status status; | |
155 | ||
156 | /* | |
157 | * Install a global async callback. This callback will receive aync | |
158 | * callbacks like "new device found". | |
159 | */ | |
160 | status = xpt_register_async(AC_FOUND_DEVICE, sgasync, NULL, NULL); | |
161 | ||
162 | if (status != CAM_REQ_CMP) { | |
163 | kprintf("sg: Failed to attach master async callbac " | |
164 | "due to status 0x%x!\n", status); | |
165 | } | |
166 | } | |
167 | ||
168 | static void | |
169 | sgoninvalidate(struct cam_periph *periph) | |
170 | { | |
171 | struct sg_softc *softc; | |
172 | ||
173 | softc = (struct sg_softc *)periph->softc; | |
174 | ||
175 | /* | |
176 | * Deregister any async callbacks. | |
177 | */ | |
178 | xpt_register_async(0, sgasync, periph, periph->path); | |
179 | ||
180 | softc->flags |= SG_FLAG_INVALID; | |
181 | ||
182 | /* | |
183 | * XXX Return all queued I/O with ENXIO. | |
184 | * XXX Handle any transactions queued to the card | |
185 | * with XPT_ABORT_CCB. | |
186 | */ | |
187 | ||
188 | if (bootverbose) { | |
189 | xpt_print(periph->path, "lost device\n"); | |
190 | } | |
191 | } | |
192 | ||
193 | static void | |
194 | sgcleanup(struct cam_periph *periph) | |
195 | { | |
196 | struct sg_softc *softc; | |
197 | ||
198 | softc = (struct sg_softc *)periph->softc; | |
199 | if (bootverbose) | |
200 | xpt_print(periph->path, "removing device entry\n"); | |
201 | devstat_remove_entry(&softc->device_stats); | |
202 | cam_periph_unlock(periph); | |
203 | destroy_dev(softc->dev); | |
204 | cam_periph_lock(periph); | |
205 | kfree(softc, M_DEVBUF); | |
206 | } | |
207 | ||
208 | static void | |
209 | sgasync(void *callback_arg, uint32_t code, struct cam_path *path, void *arg) | |
210 | { | |
211 | struct cam_periph *periph; | |
212 | ||
213 | periph = (struct cam_periph *)callback_arg; | |
214 | ||
215 | switch (code) { | |
216 | case AC_FOUND_DEVICE: | |
217 | { | |
218 | struct ccb_getdev *cgd; | |
219 | cam_status status; | |
220 | ||
221 | cgd = (struct ccb_getdev *)arg; | |
222 | if (cgd == NULL) | |
223 | break; | |
224 | ||
225 | #if 0 | |
226 | if (cgd->protocol != PROTO_SCSI) | |
227 | break; | |
228 | #endif | |
229 | ||
230 | /* | |
231 | * Allocate a peripheral instance for this device and | |
232 | * start the probe process. | |
233 | */ | |
234 | status = cam_periph_alloc(sgregister, sgoninvalidate, | |
235 | sgcleanup, sgstart, | |
236 | "sg", CAM_PERIPH_BIO, cgd->ccb_h.path, | |
237 | sgasync, AC_FOUND_DEVICE, cgd); | |
238 | if ((status != CAM_REQ_CMP) && (status != CAM_REQ_INPROG)) { | |
239 | const struct cam_status_entry *entry; | |
240 | ||
241 | entry = cam_fetch_status_entry(status); | |
242 | kprintf("sgasync: Unable to attach new device " | |
243 | "due to status %#x: %s\n", status, entry ? | |
244 | entry->status_text : "Unknown"); | |
245 | } | |
246 | break; | |
247 | } | |
248 | default: | |
249 | cam_periph_async(periph, code, path, arg); | |
250 | break; | |
251 | } | |
252 | } | |
253 | ||
254 | static cam_status | |
255 | sgregister(struct cam_periph *periph, void *arg) | |
256 | { | |
257 | struct sg_softc *softc; | |
258 | struct ccb_getdev *cgd; | |
259 | int no_tags; | |
260 | ||
261 | cgd = (struct ccb_getdev *)arg; | |
262 | if (periph == NULL) { | |
263 | kprintf("sgregister: periph was NULL!!\n"); | |
264 | return (CAM_REQ_CMP_ERR); | |
265 | } | |
266 | ||
267 | if (cgd == NULL) { | |
268 | kprintf("sgregister: no getdev CCB, can't register device\n"); | |
269 | return (CAM_REQ_CMP_ERR); | |
270 | } | |
271 | ||
272 | softc = kmalloc(sizeof(*softc), M_DEVBUF, M_WAITOK | M_ZERO); | |
388705e4 MD |
273 | softc->state = SG_STATE_NORMAL; |
274 | softc->pd_type = SID_TYPE(&cgd->inq_data); | |
275 | softc->sg_timeout = SG_DEFAULT_TIMEOUT / SG_DEFAULT_HZ * hz; | |
276 | softc->sg_user_timeout = SG_DEFAULT_TIMEOUT; | |
277 | TAILQ_INIT(&softc->rdwr_done); | |
278 | periph->softc = softc; | |
279 | ||
280 | /* | |
281 | * We pass in 0 for all blocksize, since we don't know what the | |
282 | * blocksize of the device is, if it even has a blocksize. | |
283 | */ | |
284 | cam_periph_unlock(periph); | |
285 | no_tags = (cgd->inq_data.flags & SID_CmdQue) == 0; | |
286 | devstat_add_entry(&softc->device_stats, "sg", | |
287 | periph->unit_number, 0, | |
288 | DEVSTAT_NO_BLOCKSIZE | | |
289 | (no_tags ? DEVSTAT_NO_ORDERED_TAGS : 0), | |
290 | softc->pd_type | | |
291 | DEVSTAT_TYPE_IF_SCSI | DEVSTAT_PRIORITY_PASS, | |
292 | DEVSTAT_PRIORITY_PASS); | |
293 | ||
294 | /* Register the device */ | |
295 | softc->dev = make_dev(&sg_ops, periph->unit_number, | |
296 | UID_ROOT, GID_OPERATOR, 0600, "%s%d", | |
297 | periph->periph_name, periph->unit_number); | |
298 | make_dev_alias(softc->dev, "sg%c", 'a' + periph->unit_number); | |
299 | cam_periph_lock(periph); | |
300 | softc->dev->si_drv1 = periph; | |
301 | ||
302 | /* | |
303 | * Add as async callback so that we get | |
304 | * notified if this device goes away. | |
305 | */ | |
306 | xpt_register_async(AC_LOST_DEVICE, sgasync, periph, periph->path); | |
307 | ||
d1ee0e77 | 308 | #if 0 |
388705e4 MD |
309 | if (bootverbose) |
310 | xpt_announce_periph(periph, NULL); | |
d1ee0e77 | 311 | #endif |
388705e4 MD |
312 | |
313 | return (CAM_REQ_CMP); | |
314 | } | |
315 | ||
316 | static void | |
317 | sgstart(struct cam_periph *periph, union ccb *start_ccb) | |
318 | { | |
319 | struct sg_softc *softc; | |
320 | ||
321 | softc = (struct sg_softc *)periph->softc; | |
322 | ||
323 | switch (softc->state) { | |
324 | case SG_STATE_NORMAL: | |
325 | start_ccb->ccb_h.ccb_type = SG_CCB_WAITING; | |
326 | SLIST_INSERT_HEAD(&periph->ccb_list, &start_ccb->ccb_h, | |
327 | periph_links.sle); | |
328 | periph->immediate_priority = CAM_PRIORITY_NONE; | |
329 | wakeup(&periph->ccb_list); | |
330 | break; | |
331 | } | |
332 | } | |
333 | ||
334 | static void | |
335 | sgdone(struct cam_periph *periph, union ccb *done_ccb) | |
336 | { | |
337 | struct sg_softc *softc; | |
338 | struct ccb_scsiio *csio; | |
339 | ||
340 | softc = (struct sg_softc *)periph->softc; | |
341 | csio = &done_ccb->csio; | |
a9f09b75 | 342 | |
388705e4 MD |
343 | switch (csio->ccb_h.ccb_type) { |
344 | case SG_CCB_WAITING: | |
345 | /* Caller will release the CCB */ | |
346 | wakeup(&done_ccb->ccb_h.cbfcnp); | |
347 | return; | |
348 | case SG_CCB_RDWR_IO: | |
349 | { | |
350 | struct sg_rdwr *rdwr; | |
388705e4 MD |
351 | |
352 | devstat_end_transaction( | |
353 | &softc->device_stats, | |
354 | csio->dxfer_len, | |
355 | csio->tag_action & 0xf, | |
356 | ((csio->ccb_h.flags & CAM_DIR_MASK) == | |
357 | CAM_DIR_NONE) ? DEVSTAT_NO_DATA : | |
358 | ((csio->ccb_h.flags & CAM_DIR_OUT) ? | |
359 | DEVSTAT_WRITE : DEVSTAT_READ)); | |
360 | ||
361 | rdwr = done_ccb->ccb_h.ccb_rdwr; | |
388705e4 MD |
362 | rdwr->state = SG_RDWR_DONE; |
363 | wakeup(rdwr); | |
364 | break; | |
365 | } | |
a9f09b75 MD |
366 | case SG_CCB_POLLED: |
367 | wakeup(&done_ccb->ccb_h.cbfcnp); | |
368 | return; | |
388705e4 MD |
369 | default: |
370 | panic("unknown sg CCB type"); | |
371 | } | |
372 | } | |
373 | ||
374 | static int | |
375 | sgopen(struct dev_open_args *ap) | |
376 | /*cdev_t dev, int flags, int fmt, struct thread *td)*/ | |
377 | { | |
378 | struct cam_periph *periph; | |
379 | struct sg_softc *softc; | |
380 | int error = 0; | |
381 | ||
857fcb57 MD |
382 | /* |
383 | * Disallow CAM access if RESTRICTEDROOT | |
384 | */ | |
385 | if (caps_priv_check_self(SYSCAP_RESTRICTEDROOT)) | |
386 | return (EPERM); | |
387 | ||
388705e4 MD |
388 | periph = (struct cam_periph *)ap->a_head.a_dev->si_drv1; |
389 | if (periph == NULL) | |
390 | return (ENXIO); | |
391 | ||
392 | /* | |
393 | * Don't allow access when we're running at a high securelevel. | |
394 | */ | |
395 | if (securelevel > 1) { | |
396 | cam_periph_unlock(periph); | |
397 | cam_periph_release(periph); | |
398 | return(EPERM); | |
399 | } | |
400 | cam_periph_lock(periph); | |
401 | ||
402 | softc = (struct sg_softc *)periph->softc; | |
403 | if (softc->flags & SG_FLAG_INVALID) { | |
404 | cam_periph_unlock(periph); | |
405 | return (ENXIO); | |
406 | } | |
407 | ||
408 | if ((softc->flags & SG_FLAG_OPEN) == 0) { | |
409 | softc->flags |= SG_FLAG_OPEN; | |
410 | cam_periph_unlock(periph); | |
411 | } else { | |
412 | /* Device closes aren't symmetrical, fix up the refcount. */ | |
413 | cam_periph_unlock(periph); | |
414 | cam_periph_release(periph); | |
415 | } | |
416 | ||
417 | return (error); | |
418 | } | |
419 | ||
420 | static int | |
421 | sgclose(struct dev_close_args *ap) | |
422 | /* cdev_t dev, int flag, int fmt, struct thread *td) */ | |
423 | { | |
424 | struct cam_periph *periph; | |
425 | struct sg_softc *softc; | |
426 | ||
427 | periph = (struct cam_periph *)ap->a_head.a_dev->si_drv1; | |
428 | if (periph == NULL) | |
429 | return (ENXIO); | |
430 | ||
431 | cam_periph_lock(periph); | |
432 | ||
433 | softc = (struct sg_softc *)periph->softc; | |
434 | softc->flags &= ~SG_FLAG_OPEN; | |
435 | ||
436 | cam_periph_unlock(periph); | |
437 | cam_periph_release(periph); | |
438 | ||
439 | return (0); | |
440 | } | |
441 | ||
442 | static int | |
443 | sgioctl(struct dev_ioctl_args *ap) | |
444 | /* cdev_t dev, u_long cmd, caddr_t arg, int flag, struct thread *td) */ | |
445 | { | |
446 | union ccb *ccb; | |
447 | struct ccb_scsiio *csio; | |
448 | struct cam_periph *periph; | |
449 | struct sg_softc *softc; | |
450 | struct sg_io_hdr req; | |
451 | int dir, error; | |
452 | ||
453 | periph = (struct cam_periph *)ap->a_head.a_dev->si_drv1; | |
454 | if (periph == NULL) | |
455 | return (ENXIO); | |
456 | ||
457 | cam_periph_lock(periph); | |
458 | ||
459 | softc = (struct sg_softc *)periph->softc; | |
460 | error = 0; | |
461 | ||
462 | switch (ap->a_cmd) { | |
85aae976 | 463 | #if 0 |
388705e4 MD |
464 | case LINUX_SCSI_GET_BUS_NUMBER: { |
465 | int busno; | |
466 | ||
467 | busno = xpt_path_path_id(periph->path); | |
468 | error = copyout(&busno, ap->a_data, sizeof(busno)); | |
469 | break; | |
470 | } | |
471 | case LINUX_SCSI_GET_IDLUN: { | |
472 | struct scsi_idlun idlun; | |
473 | struct cam_sim *sim; | |
474 | ||
475 | idlun.dev_id = xpt_path_target_id(periph->path); | |
476 | sim = xpt_path_sim(periph->path); | |
477 | idlun.host_unique_id = sim->unit_number; | |
478 | error = copyout(&idlun, ap->a_data, sizeof(idlun)); | |
479 | break; | |
480 | } | |
85aae976 | 481 | #endif |
388705e4 | 482 | case SG_GET_VERSION_NUM: |
388705e4 MD |
483 | error = copyout(&sg_version, ap->a_data, sizeof(sg_version)); |
484 | break; | |
85aae976 | 485 | case SG_SET_TIMEOUT: { |
388705e4 MD |
486 | u_int user_timeout; |
487 | ||
488 | error = copyin(ap->a_data, &user_timeout, sizeof(u_int)); | |
489 | if (error == 0) { | |
490 | softc->sg_user_timeout = user_timeout; | |
491 | softc->sg_timeout = user_timeout / SG_DEFAULT_HZ * hz; | |
492 | } | |
493 | break; | |
494 | } | |
495 | case SG_GET_TIMEOUT: | |
388705e4 MD |
496 | /* |
497 | * The value is returned directly to the syscall. | |
498 | */ | |
1ff2c2bf | 499 | ap->a_sysmsg->sysmsg_result = softc->sg_user_timeout; |
388705e4 MD |
500 | error = 0; |
501 | break; | |
502 | case SG_IO: | |
388705e4 MD |
503 | error = copyin(ap->a_data, &req, sizeof(req)); |
504 | if (error) | |
505 | break; | |
506 | ||
507 | if (req.cmd_len > IOCDBLEN) { | |
508 | error = EINVAL; | |
509 | break; | |
510 | } | |
511 | ||
512 | if (req.iovec_count != 0) { | |
513 | error = EOPNOTSUPP; | |
514 | break; | |
515 | } | |
516 | ||
517 | ccb = cam_periph_getccb(periph, /*priority*/5); | |
a9f09b75 | 518 | ccb->ccb_h.ccb_type = SG_CCB_POLLED; |
388705e4 MD |
519 | csio = &ccb->csio; |
520 | ||
a9f09b75 | 521 | error = copyin(req.cmdp, &csio->cdb_io.cdb_bytes, req.cmd_len); |
388705e4 MD |
522 | if (error) { |
523 | xpt_release_ccb(ccb); | |
524 | break; | |
525 | } | |
526 | ||
527 | switch(req.dxfer_direction) { | |
528 | case SG_DXFER_TO_DEV: | |
529 | dir = CAM_DIR_OUT; | |
530 | break; | |
531 | case SG_DXFER_FROM_DEV: | |
532 | dir = CAM_DIR_IN; | |
533 | break; | |
534 | case SG_DXFER_TO_FROM_DEV: | |
535 | dir = CAM_DIR_IN | CAM_DIR_OUT; | |
536 | break; | |
537 | case SG_DXFER_NONE: | |
538 | default: | |
539 | dir = CAM_DIR_NONE; | |
540 | break; | |
541 | } | |
542 | ||
543 | cam_fill_csio(csio, | |
544 | /*retries*/1, | |
545 | sgdone, | |
546 | dir|CAM_DEV_QFRZDIS, | |
547 | MSG_SIMPLE_Q_TAG, | |
548 | req.dxferp, | |
549 | req.dxfer_len, | |
550 | req.mx_sb_len, | |
551 | req.cmd_len, | |
552 | req.timeout); | |
553 | ||
554 | error = sgsendccb(periph, ccb); | |
555 | if (error) { | |
556 | req.host_status = DID_ERROR; | |
557 | req.driver_status = DRIVER_INVALID; | |
558 | xpt_release_ccb(ccb); | |
559 | break; | |
560 | } | |
561 | ||
562 | req.status = csio->scsi_status; | |
563 | req.masked_status = (csio->scsi_status >> 1) & 0x7f; | |
564 | sg_scsiio_status(csio, &req.host_status, &req.driver_status); | |
565 | req.resid = csio->resid; | |
566 | req.duration = csio->ccb_h.timeout; | |
567 | req.info = 0; | |
568 | ||
569 | error = copyout(&req, ap->a_data, sizeof(req)); | |
570 | if ((error == 0) && (csio->ccb_h.status & CAM_AUTOSNS_VALID) | |
571 | && (req.sbp != NULL)) { | |
572 | req.sb_len_wr = req.mx_sb_len - csio->sense_resid; | |
573 | error = copyout(&csio->sense_data, req.sbp, | |
574 | req.sb_len_wr); | |
575 | } | |
576 | ||
577 | xpt_release_ccb(ccb); | |
578 | break; | |
579 | ||
85aae976 | 580 | case SG_GET_RESERVED_SIZE: { |
388705e4 MD |
581 | int size = 32768; |
582 | ||
583 | error = copyout(&size, ap->a_data, sizeof(size)); | |
584 | break; | |
585 | } | |
586 | ||
587 | case SG_GET_SCSI_ID: | |
388705e4 MD |
588 | { |
589 | struct sg_scsi_id id; | |
590 | ||
591 | id.host_no = 0; /* XXX */ | |
592 | id.channel = xpt_path_path_id(periph->path); | |
593 | id.scsi_id = xpt_path_target_id(periph->path); | |
594 | id.lun = xpt_path_lun_id(periph->path); | |
595 | id.scsi_type = softc->pd_type; | |
596 | id.h_cmd_per_lun = 1; | |
597 | id.d_queue_depth = 1; | |
598 | id.unused[0] = 0; | |
599 | id.unused[1] = 0; | |
600 | ||
601 | error = copyout(&id, ap->a_data, sizeof(id)); | |
602 | break; | |
603 | } | |
604 | ||
605 | case SG_EMULATED_HOST: | |
606 | case SG_SET_TRANSFORM: | |
607 | case SG_GET_TRANSFORM: | |
608 | case SG_GET_NUM_WAITING: | |
609 | case SG_SCSI_RESET: | |
610 | case SG_GET_REQUEST_TABLE: | |
611 | case SG_SET_KEEP_ORPHAN: | |
612 | case SG_GET_KEEP_ORPHAN: | |
613 | case SG_GET_ACCESS_COUNT: | |
614 | case SG_SET_FORCE_LOW_DMA: | |
615 | case SG_GET_LOW_DMA: | |
616 | case SG_GET_SG_TABLESIZE: | |
617 | case SG_SET_FORCE_PACK_ID: | |
618 | case SG_GET_PACK_ID: | |
619 | case SG_SET_RESERVED_SIZE: | |
620 | case SG_GET_COMMAND_Q: | |
621 | case SG_SET_COMMAND_Q: | |
622 | case SG_SET_DEBUG: | |
623 | case SG_NEXT_CMD_LEN: | |
388705e4 MD |
624 | default: |
625 | #ifdef CAMDEBUG | |
fc58f882 | 626 | kprintf("sgioctl: rejecting cmd 0x%lx\n", ap->a_cmd); |
388705e4 MD |
627 | #endif |
628 | error = ENODEV; | |
629 | break; | |
630 | } | |
631 | ||
632 | cam_periph_unlock(periph); | |
633 | return (error); | |
634 | } | |
635 | ||
636 | static int | |
637 | sgwrite(struct dev_write_args *ap) | |
638 | /*cdev_t dev, struct uio *uio, int ioflag)*/ | |
639 | { | |
640 | union ccb *ccb; | |
641 | struct cam_periph *periph; | |
642 | struct ccb_scsiio *csio; | |
643 | struct sg_softc *sc; | |
644 | struct sg_header *hdr; | |
645 | struct sg_rdwr *rdwr; | |
646 | u_char cdb_cmd; | |
647 | char *buf; | |
648 | int error = 0, cdb_len, buf_len, dir; | |
649 | struct uio *uio = ap->a_uio; | |
650 | ||
651 | periph = ap->a_head.a_dev->si_drv1; | |
652 | rdwr = kmalloc(sizeof(*rdwr), M_DEVBUF, M_WAITOK | M_ZERO); | |
653 | hdr = &rdwr->hdr.hdr; | |
654 | ||
655 | /* Copy in the header block and sanity check it */ | |
656 | if (uio->uio_resid < sizeof(*hdr)) { | |
657 | error = EINVAL; | |
658 | goto out_hdr; | |
659 | } | |
660 | error = uiomove((char *)hdr, sizeof(*hdr), uio); | |
661 | if (error) | |
662 | goto out_hdr; | |
663 | ||
664 | ccb = xpt_alloc_ccb(); | |
665 | if (ccb == NULL) { | |
666 | error = ENOMEM; | |
667 | goto out_hdr; | |
668 | } | |
669 | csio = &ccb->csio; | |
670 | ||
671 | /* | |
672 | * Copy in the CDB block. The designers of the interface didn't | |
673 | * bother to provide a size for this in the header, so we have to | |
674 | * figure it out ourselves. | |
675 | */ | |
676 | if (uio->uio_resid < 1) | |
677 | goto out_ccb; | |
678 | error = uiomove(&cdb_cmd, 1, uio); | |
679 | if (error) | |
680 | goto out_ccb; | |
681 | if (hdr->twelve_byte) | |
682 | cdb_len = 12; | |
683 | else | |
684 | cdb_len = scsi_group_len(cdb_cmd); | |
685 | /* | |
686 | * We've already read the first byte of the CDB and advanced the uio | |
687 | * pointer. Just read the rest. | |
688 | */ | |
689 | csio->cdb_io.cdb_bytes[0] = cdb_cmd; | |
690 | error = uiomove(&csio->cdb_io.cdb_bytes[1], cdb_len - 1, uio); | |
691 | if (error) | |
692 | goto out_ccb; | |
693 | ||
694 | /* | |
695 | * Now set up the data block. Again, the designers didn't bother | |
696 | * to make this reliable. | |
697 | */ | |
698 | buf_len = uio->uio_resid; | |
699 | if (buf_len != 0) { | |
700 | buf = kmalloc(buf_len, M_DEVBUF, M_WAITOK | M_ZERO); | |
701 | error = uiomove(buf, buf_len, uio); | |
702 | if (error) | |
703 | goto out_buf; | |
704 | dir = CAM_DIR_OUT; | |
705 | } else if (hdr->reply_len != 0) { | |
706 | buf = kmalloc(hdr->reply_len, M_DEVBUF, M_WAITOK | M_ZERO); | |
707 | buf_len = hdr->reply_len; | |
708 | dir = CAM_DIR_IN; | |
709 | } else { | |
710 | buf = NULL; | |
711 | buf_len = 0; | |
712 | dir = CAM_DIR_NONE; | |
713 | } | |
714 | ||
715 | cam_periph_lock(periph); | |
716 | sc = periph->softc; | |
717 | xpt_setup_ccb(&ccb->ccb_h, periph->path, /*priority*/5); | |
718 | cam_fill_csio(csio, | |
719 | /*retries*/1, | |
720 | sgdone, | |
721 | dir|CAM_DEV_QFRZDIS, | |
722 | MSG_SIMPLE_Q_TAG, | |
723 | buf, | |
724 | buf_len, | |
725 | SG_MAX_SENSE, | |
726 | cdb_len, | |
727 | sc->sg_timeout); | |
728 | ||
729 | /* | |
730 | * Send off the command and hope that it works. This path does not | |
731 | * go through sgstart because the I/O is supposed to be asynchronous. | |
732 | */ | |
733 | rdwr->buf = buf; | |
734 | rdwr->buf_len = buf_len; | |
735 | rdwr->tag = hdr->pack_id; | |
736 | rdwr->ccb = ccb; | |
737 | rdwr->state = SG_RDWR_INPROG; | |
738 | ccb->ccb_h.ccb_rdwr = rdwr; | |
739 | ccb->ccb_h.ccb_type = SG_CCB_RDWR_IO; | |
740 | TAILQ_INSERT_TAIL(&sc->rdwr_done, rdwr, rdwr_link); | |
741 | error = sgsendrdwr(periph, ccb); | |
742 | cam_periph_unlock(periph); | |
743 | return (error); | |
744 | ||
745 | out_buf: | |
746 | kfree(buf, M_DEVBUF); | |
747 | out_ccb: | |
cec957e9 | 748 | xpt_free_ccb(&ccb->ccb_h); |
388705e4 MD |
749 | out_hdr: |
750 | kfree(rdwr, M_DEVBUF); | |
751 | return (error); | |
752 | } | |
753 | ||
754 | static int | |
755 | sgread(struct dev_read_args *ap) | |
756 | /*cdev_t dev, struct uio *uio, int ioflag)*/ | |
757 | { | |
758 | struct ccb_scsiio *csio; | |
759 | struct cam_periph *periph; | |
760 | struct sg_softc *sc; | |
761 | struct sg_header *hdr; | |
762 | struct sg_rdwr *rdwr; | |
763 | u_short hstat, dstat; | |
764 | int error, pack_len, reply_len, pack_id; | |
765 | struct uio *uio = ap->a_uio; | |
766 | ||
767 | periph = ap->a_head.a_dev->si_drv1; | |
768 | ||
769 | /* XXX The pack len field needs to be updated and written out instead | |
770 | * of discarded. Not sure how to do that. | |
771 | */ | |
772 | uio->uio_rw = UIO_WRITE; | |
773 | if ((error = uiomove((char *)&pack_len, 4, uio)) != 0) | |
774 | return (error); | |
775 | if ((error = uiomove((char *)&reply_len, 4, uio)) != 0) | |
776 | return (error); | |
777 | if ((error = uiomove((char *)&pack_id, 4, uio)) != 0) | |
778 | return (error); | |
779 | uio->uio_rw = UIO_READ; | |
780 | ||
781 | cam_periph_lock(periph); | |
782 | sc = periph->softc; | |
783 | search: | |
784 | TAILQ_FOREACH(rdwr, &sc->rdwr_done, rdwr_link) { | |
785 | if (rdwr->tag == pack_id) | |
786 | break; | |
787 | } | |
788 | if (rdwr == NULL) { | |
789 | cam_periph_unlock(periph); | |
790 | if (tsleep(&hstat, PCATCH, "sgnull", 0) == ERESTART) | |
791 | return(EAGAIN); | |
792 | cam_periph_lock(periph); | |
793 | goto search; | |
794 | } | |
795 | if (rdwr->state != SG_RDWR_DONE) { | |
796 | tsleep_interlock(rdwr, PCATCH); | |
797 | cam_periph_unlock(periph); | |
798 | if (rdwr->state != SG_RDWR_DONE) { | |
799 | if (tsleep(rdwr, PCATCH | PINTERLOCKED, "sgread", 0) == | |
800 | ERESTART) { | |
801 | return (EAGAIN); | |
802 | } | |
803 | } | |
804 | cam_periph_lock(periph); | |
805 | goto search; | |
806 | } | |
807 | TAILQ_REMOVE(&sc->rdwr_done, rdwr, rdwr_link); | |
808 | cam_periph_unlock(periph); | |
809 | ||
810 | hdr = &rdwr->hdr.hdr; | |
811 | csio = &rdwr->ccb->csio; | |
812 | sg_scsiio_status(csio, &hstat, &dstat); | |
813 | hdr->host_status = hstat; | |
814 | hdr->driver_status = dstat; | |
815 | hdr->target_status = csio->scsi_status >> 1; | |
816 | ||
817 | switch (hstat) { | |
818 | case DID_OK: | |
819 | case DID_PASSTHROUGH: | |
820 | case DID_SOFT_ERROR: | |
821 | hdr->result = 0; | |
822 | break; | |
823 | case DID_NO_CONNECT: | |
824 | case DID_BUS_BUSY: | |
825 | case DID_TIME_OUT: | |
826 | hdr->result = EBUSY; | |
827 | break; | |
828 | case DID_BAD_TARGET: | |
829 | case DID_ABORT: | |
830 | case DID_PARITY: | |
831 | case DID_RESET: | |
832 | case DID_BAD_INTR: | |
833 | case DID_ERROR: | |
834 | default: | |
835 | hdr->result = EIO; | |
836 | break; | |
837 | } | |
838 | ||
839 | if (dstat == DRIVER_SENSE) { | |
840 | bcopy(&csio->sense_data, hdr->sense_buffer, | |
841 | min(csio->sense_len, SG_MAX_SENSE)); | |
842 | #ifdef CAMDEBUG | |
843 | scsi_sense_print(csio); | |
844 | #endif | |
845 | } | |
846 | ||
847 | error = uiomove((char *)&hdr->result, sizeof(*hdr) - | |
848 | offsetof(struct sg_header, result), uio); | |
849 | if ((error == 0) && (hdr->result == 0)) | |
850 | error = uiomove(rdwr->buf, rdwr->buf_len, uio); | |
851 | ||
852 | cam_periph_lock(periph); | |
cec957e9 | 853 | xpt_free_ccb(&rdwr->ccb->ccb_h); |
388705e4 MD |
854 | cam_periph_unlock(periph); |
855 | kfree(rdwr->buf, M_DEVBUF); | |
856 | kfree(rdwr, M_DEVBUF); | |
857 | return (error); | |
858 | } | |
859 | ||
860 | static int | |
861 | sgsendccb(struct cam_periph *periph, union ccb *ccb) | |
862 | { | |
863 | struct sg_softc *softc; | |
864 | struct cam_periph_map_info mapinfo; | |
865 | int error, need_unmap = 0; | |
866 | ||
867 | softc = periph->softc; | |
868 | if (((ccb->ccb_h.flags & CAM_DIR_MASK) != CAM_DIR_NONE) | |
869 | && (ccb->csio.data_ptr != NULL)) { | |
870 | bzero(&mapinfo, sizeof(mapinfo)); | |
871 | ||
872 | /* | |
873 | * cam_periph_mapmem calls into proc and vm functions that can | |
874 | * sleep as well as trigger I/O, so we can't hold the lock. | |
875 | * Dropping it here is reasonably safe. | |
876 | */ | |
877 | cam_periph_unlock(periph); | |
878 | error = cam_periph_mapmem(ccb, &mapinfo); | |
879 | cam_periph_lock(periph); | |
880 | if (error) | |
881 | return (error); | |
882 | need_unmap = 1; | |
883 | } | |
884 | ||
885 | error = cam_periph_runccb(ccb, sgerror, CAM_RETRY_SELTO, | |
886 | SF_RETRY_UA, &softc->device_stats); | |
887 | ||
888 | if (need_unmap) | |
889 | cam_periph_unmapmem(ccb, &mapinfo); | |
890 | ||
891 | return (error); | |
892 | } | |
893 | ||
894 | static int | |
895 | sgsendrdwr(struct cam_periph *periph, union ccb *ccb) | |
896 | { | |
897 | struct sg_softc *softc; | |
898 | ||
899 | softc = periph->softc; | |
900 | devstat_start_transaction(&softc->device_stats); | |
901 | xpt_action(ccb); | |
902 | return (0); | |
903 | } | |
904 | ||
905 | static int | |
906 | sgerror(union ccb *ccb, uint32_t cam_flags, uint32_t sense_flags) | |
907 | { | |
908 | struct cam_periph *periph; | |
909 | struct sg_softc *softc; | |
910 | ||
911 | periph = xpt_path_periph(ccb->ccb_h.path); | |
912 | softc = (struct sg_softc *)periph->softc; | |
913 | ||
914 | return (cam_periph_error(ccb, cam_flags, sense_flags, | |
915 | &softc->saved_ccb)); | |
916 | } | |
917 | ||
918 | static void | |
919 | sg_scsiio_status(struct ccb_scsiio *csio, u_short *hoststat, u_short *drvstat) | |
920 | { | |
921 | int status; | |
922 | ||
923 | status = csio->ccb_h.status; | |
924 | ||
925 | switch (status & CAM_STATUS_MASK) { | |
926 | case CAM_REQ_CMP: | |
927 | *hoststat = DID_OK; | |
928 | *drvstat = 0; | |
929 | break; | |
930 | case CAM_REQ_CMP_ERR: | |
931 | *hoststat = DID_ERROR; | |
932 | *drvstat = 0; | |
933 | break; | |
934 | case CAM_REQ_ABORTED: | |
935 | *hoststat = DID_ABORT; | |
936 | *drvstat = 0; | |
937 | break; | |
938 | case CAM_REQ_INVALID: | |
939 | *hoststat = DID_ERROR; | |
940 | *drvstat = DRIVER_INVALID; | |
941 | break; | |
942 | case CAM_DEV_NOT_THERE: | |
943 | *hoststat = DID_BAD_TARGET; | |
944 | *drvstat = 0; | |
945 | break; | |
946 | case CAM_SEL_TIMEOUT: | |
947 | *hoststat = DID_NO_CONNECT; | |
948 | *drvstat = 0; | |
949 | break; | |
950 | case CAM_CMD_TIMEOUT: | |
951 | *hoststat = DID_TIME_OUT; | |
952 | *drvstat = 0; | |
953 | break; | |
954 | case CAM_SCSI_STATUS_ERROR: | |
955 | *hoststat = DID_ERROR; | |
956 | *drvstat = 0; | |
957 | break; | |
958 | case CAM_SCSI_BUS_RESET: | |
959 | *hoststat = DID_RESET; | |
960 | *drvstat = 0; | |
961 | break; | |
962 | case CAM_UNCOR_PARITY: | |
963 | *hoststat = DID_PARITY; | |
964 | *drvstat = 0; | |
965 | break; | |
966 | case CAM_SCSI_BUSY: | |
967 | *hoststat = DID_BUS_BUSY; | |
968 | *drvstat = 0; | |
969 | break; | |
970 | default: | |
971 | *hoststat = DID_ERROR; | |
972 | *drvstat = DRIVER_ERROR; | |
973 | } | |
974 | ||
975 | if (status & CAM_AUTOSNS_VALID) | |
976 | *drvstat = DRIVER_SENSE; | |
977 | } | |
978 | ||
979 | static int | |
980 | scsi_group_len(u_char cmd) | |
981 | { | |
982 | int len[] = {6, 10, 10, 12, 12, 12, 10, 10}; | |
983 | int group; | |
984 | ||
985 | group = (cmd >> 5) & 0x7; | |
986 | return (len[group]); | |
987 | } |