DEVFS - remove dev_ops_add(), dev_ops_get(), and get_dev()
[dragonfly.git] / sys / bus / cam / scsi / scsi_pt.c
CommitLineData
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1/*
2 * Implementation of SCSI Processor Target Peripheral driver for CAM.
3 *
4 * Copyright (c) 1998 Justin T. Gibbs.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions, and the following disclaimer,
12 * without modification, immediately at the beginning of the file.
13 * 2. The name of the author may not be used to endorse or promote products
14 * derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
20 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 *
28 * $FreeBSD: src/sys/cam/scsi/scsi_pt.c,v 1.17 2000/01/17 06:27:37 mjacob Exp $
1c8b7a9a 29 * $DragonFly: src/sys/bus/cam/scsi/scsi_pt.c,v 1.23 2008/05/18 20:30:20 pavalos Exp $
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30 */
31
32#include <sys/param.h>
33#include <sys/queue.h>
34#include <sys/systm.h>
35#include <sys/kernel.h>
36#include <sys/types.h>
37#include <sys/buf.h>
38#include <sys/devicestat.h>
39#include <sys/malloc.h>
40#include <sys/conf.h>
41#include <sys/ptio.h>
f15db79e 42#include <sys/buf2.h>
4e01b467 43#include <sys/thread2.h>
984263bc 44
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45#include "../cam.h"
46#include "../cam_ccb.h"
47#include "../cam_extend.h"
48#include "../cam_periph.h"
49#include "../cam_xpt_periph.h"
50#include "../cam_debug.h"
984263bc 51
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52#include "scsi_all.h"
53#include "scsi_message.h"
54#include "scsi_pt.h"
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55
56#include "opt_pt.h"
57
58typedef enum {
59 PT_STATE_PROBE,
60 PT_STATE_NORMAL
61} pt_state;
62
63typedef enum {
64 PT_FLAG_NONE = 0x00,
65 PT_FLAG_OPEN = 0x01,
66 PT_FLAG_DEVICE_INVALID = 0x02,
67 PT_FLAG_RETRY_UA = 0x04
68} pt_flags;
69
70typedef enum {
71 PT_CCB_BUFFER_IO = 0x01,
72 PT_CCB_WAITING = 0x02,
73 PT_CCB_RETRY_UA = 0x04,
74 PT_CCB_BUFFER_IO_UA = PT_CCB_BUFFER_IO|PT_CCB_RETRY_UA
75} pt_ccb_state;
76
77/* Offsets into our private area for storing information */
78#define ccb_state ppriv_field0
81b5c339 79#define ccb_bio ppriv_ptr1
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80
81struct pt_softc {
81b5c339 82 struct bio_queue_head bio_queue;
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83 struct devstat device_stats;
84 LIST_HEAD(, ccb_hdr) pending_ccbs;
85 pt_state state;
86 pt_flags flags;
87 union ccb saved_ccb;
88 int io_timeout;
b13267a5 89 cdev_t dev;
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90};
91
92static d_open_t ptopen;
93static d_close_t ptclose;
94static d_strategy_t ptstrategy;
95static periph_init_t ptinit;
96static void ptasync(void *callback_arg, u_int32_t code,
97 struct cam_path *path, void *arg);
98static periph_ctor_t ptctor;
99static periph_oninv_t ptoninvalidate;
100static periph_dtor_t ptdtor;
101static periph_start_t ptstart;
102static void ptdone(struct cam_periph *periph,
103 union ccb *done_ccb);
104static d_ioctl_t ptioctl;
105static int pterror(union ccb *ccb, u_int32_t cam_flags,
106 u_int32_t sense_flags);
107
108void scsi_send_receive(struct ccb_scsiio *csio, u_int32_t retries,
109 void (*cbfcnp)(struct cam_periph *, union ccb *),
110 u_int tag_action, int readop, u_int byte2,
111 u_int32_t xfer_len, u_int8_t *data_ptr,
112 u_int8_t sense_len, u_int32_t timeout);
113
114static struct periph_driver ptdriver =
115{
116 ptinit, "pt",
117 TAILQ_HEAD_INITIALIZER(ptdriver.units), /* generation */ 0
118};
119
2ad14cb5 120PERIPHDRIVER_DECLARE(pt, ptdriver);
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121
122#define PT_CDEV_MAJOR 61
123
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124static struct dev_ops pt_ops = {
125 { "pt", PT_CDEV_MAJOR, 0 },
126 .d_open = ptopen,
127 .d_close = ptclose,
128 .d_read = physread,
129 .d_write = physwrite,
130 .d_ioctl = ptioctl,
131 .d_strategy = ptstrategy,
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132};
133
134static struct extend_array *ptperiphs;
135
136#ifndef SCSI_PT_DEFAULT_TIMEOUT
137#define SCSI_PT_DEFAULT_TIMEOUT 60
138#endif
139
140static int
fef8985e 141ptopen(struct dev_open_args *ap)
984263bc 142{
b13267a5 143 cdev_t dev = ap->a_head.a_dev;
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144 struct cam_periph *periph;
145 struct pt_softc *softc;
146 int unit;
1c8b7a9a 147 int error = 0;
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148
149 unit = minor(dev);
150 periph = cam_extend_get(ptperiphs, unit);
1c8b7a9a 151 if (cam_periph_acquire(periph) != CAM_REQ_CMP)
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152 return (ENXIO);
153
154 softc = (struct pt_softc *)periph->softc;
155
1c8b7a9a 156 cam_periph_lock(periph);
984263bc 157 if (softc->flags & PT_FLAG_DEVICE_INVALID) {
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158 cam_periph_unlock(periph);
159 cam_periph_release(periph);
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160 return(ENXIO);
161 }
162
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163 if ((softc->flags & PT_FLAG_OPEN) == 0)
164 softc->flags |= PT_FLAG_OPEN;
165 else {
166 error = EBUSY;
167 cam_periph_release(periph);
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168 }
169
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170 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE,
171 ("ptopen: dev=%s\n", devtoname(dev)));
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172
173 cam_periph_unlock(periph);
174 return (error);
175}
176
177static int
fef8985e 178ptclose(struct dev_close_args *ap)
984263bc 179{
b13267a5 180 cdev_t dev = ap->a_head.a_dev;
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181 struct cam_periph *periph;
182 struct pt_softc *softc;
183 int unit;
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184
185 unit = minor(dev);
186 periph = cam_extend_get(ptperiphs, unit);
187 if (periph == NULL)
188 return (ENXIO);
189
190 softc = (struct pt_softc *)periph->softc;
191
1c8b7a9a 192 cam_periph_lock(periph);
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193
194 softc->flags &= ~PT_FLAG_OPEN;
195 cam_periph_unlock(periph);
196 cam_periph_release(periph);
197 return (0);
198}
199
200/*
201 * Actually translate the requested transfer into one the physical driver
202 * can understand. The transfer is described by a buf and will include
203 * only one physical transfer.
204 */
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205static int
206ptstrategy(struct dev_strategy_args *ap)
984263bc 207{
b13267a5 208 cdev_t dev = ap->a_head.a_dev;
fef8985e 209 struct bio *bio = ap->a_bio;
81b5c339 210 struct buf *bp = bio->bio_buf;
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211 struct cam_periph *periph;
212 struct pt_softc *softc;
213 u_int unit;
984263bc 214
81b5c339 215 unit = minor(dev);
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216 periph = cam_extend_get(ptperiphs, unit);
217 if (periph == NULL) {
218 bp->b_error = ENXIO;
219 goto bad;
220 }
1c8b7a9a 221 cam_periph_lock(periph);
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222 softc = (struct pt_softc *)periph->softc;
223
224 /*
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225 * If the device has been made invalid, error out
226 */
227 if ((softc->flags & PT_FLAG_DEVICE_INVALID)) {
1c8b7a9a 228 cam_periph_unlock(periph);
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229 bp->b_error = ENXIO;
230 goto bad;
231 }
232
233 /*
234 * Place it in the queue of disk activities for this disk
235 */
81b5c339 236 bioq_insert_tail(&softc->bio_queue, bio);
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237
238 /*
239 * Schedule ourselves for performing the work.
240 */
241 xpt_schedule(periph, /* XXX priority */1);
1c8b7a9a 242 cam_periph_unlock(periph);
984263bc 243
fef8985e 244 return(0);
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245bad:
246 bp->b_flags |= B_ERROR;
247
248 /*
249 * Correctly set the buf to indicate a completed xfer
250 */
251 bp->b_resid = bp->b_bcount;
81b5c339 252 biodone(bio);
fef8985e 253 return(0);
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254}
255
256static void
257ptinit(void)
258{
259 cam_status status;
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260
261 /*
262 * Create our extend array for storing the devices we attach to.
263 */
264 ptperiphs = cam_extend_new();
265 if (ptperiphs == NULL) {
85f8e2ea 266 kprintf("pt: Failed to alloc extend array!\n");
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267 return;
268 }
269
270 /*
271 * Install a global async callback. This callback will
272 * receive async callbacks like "new device found".
273 */
1c8b7a9a 274 status = xpt_register_async(AC_FOUND_DEVICE, ptasync, NULL, NULL);
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275
276 if (status != CAM_REQ_CMP) {
85f8e2ea 277 kprintf("pt: Failed to attach master async callback "
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278 "due to status 0x%x!\n", status);
279 }
280}
281
282static cam_status
283ptctor(struct cam_periph *periph, void *arg)
284{
285 struct pt_softc *softc;
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286 struct ccb_getdev *cgd;
287
288 cgd = (struct ccb_getdev *)arg;
289 if (periph == NULL) {
85f8e2ea 290 kprintf("ptregister: periph was NULL!!\n");
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291 return(CAM_REQ_CMP_ERR);
292 }
293
294 if (cgd == NULL) {
85f8e2ea 295 kprintf("ptregister: no getdev CCB, can't register device\n");
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296 return(CAM_REQ_CMP_ERR);
297 }
298
efda3bd0 299 softc = kmalloc(sizeof(*softc), M_DEVBUF, M_INTWAIT | M_ZERO);
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300 LIST_INIT(&softc->pending_ccbs);
301 softc->state = PT_STATE_NORMAL;
81b5c339 302 bioq_init(&softc->bio_queue);
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303
304 softc->io_timeout = SCSI_PT_DEFAULT_TIMEOUT * 1000;
305
306 periph->softc = softc;
307
1c8b7a9a 308 cam_periph_unlock(periph);
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309 cam_extend_set(ptperiphs, periph->unit_number, periph);
310
311 devstat_add_entry(&softc->device_stats, "pt",
312 periph->unit_number, 0,
313 DEVSTAT_NO_BLOCKSIZE,
314 SID_TYPE(&cgd->inq_data) | DEVSTAT_TYPE_IF_SCSI,
315 DEVSTAT_PRIORITY_OTHER);
316
fef8985e 317 make_dev(&pt_ops, periph->unit_number, UID_ROOT,
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318 GID_OPERATOR, 0600, "%s%d", periph->periph_name,
319 periph->unit_number);
1c8b7a9a 320 cam_periph_lock(periph);
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321 /*
322 * Add async callbacks for bus reset and
323 * bus device reset calls. I don't bother
324 * checking if this fails as, in most cases,
325 * the system will function just fine without
326 * them and the only alternative would be to
327 * not attach the device on failure.
328 */
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PA
329 xpt_register_async(AC_SENT_BDR | AC_BUS_RESET | AC_LOST_DEVICE,
330 ptasync, periph, periph->path);
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331
332 /* Tell the user we've attached to the device */
333 xpt_announce_periph(periph, NULL);
334
335 return(CAM_REQ_CMP);
336}
337
338static void
339ptoninvalidate(struct cam_periph *periph)
340{
984263bc 341 struct pt_softc *softc;
81b5c339 342 struct bio *q_bio;
984263bc 343 struct buf *q_bp;
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344
345 softc = (struct pt_softc *)periph->softc;
346
347 /*
348 * De-register any async callbacks.
349 */
1c8b7a9a 350 xpt_register_async(0, ptasync, periph, periph->path);
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351
352 softc->flags |= PT_FLAG_DEVICE_INVALID;
353
354 /*
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355 * Return all queued I/O with ENXIO.
356 * XXX Handle any transactions queued to the card
357 * with XPT_ABORT_CCB.
358 */
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MD
359 while ((q_bio = bioq_first(&softc->bio_queue)) != NULL){
360 bioq_remove(&softc->bio_queue, q_bio);
361 q_bp = q_bio->bio_buf;
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362 q_bp->b_resid = q_bp->b_bcount;
363 q_bp->b_error = ENXIO;
364 q_bp->b_flags |= B_ERROR;
81b5c339 365 biodone(q_bio);
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366 }
367
1c8b7a9a 368 xpt_print(periph->path, "lost device\n");
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369}
370
371static void
372ptdtor(struct cam_periph *periph)
373{
374 struct pt_softc *softc;
375
376 softc = (struct pt_softc *)periph->softc;
377
378 devstat_remove_entry(&softc->device_stats);
379
984263bc 380 cam_extend_release(ptperiphs, periph->unit_number);
1c8b7a9a 381 xpt_print(periph->path, "removing device entry\n");
cd29885a 382 dev_ops_remove_minor(&pt_ops, periph->unit_number);
efda3bd0 383 kfree(softc, M_DEVBUF);
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384}
385
386static void
387ptasync(void *callback_arg, u_int32_t code, struct cam_path *path, void *arg)
388{
389 struct cam_periph *periph;
390
391 periph = (struct cam_periph *)callback_arg;
392 switch (code) {
393 case AC_FOUND_DEVICE:
394 {
395 struct ccb_getdev *cgd;
396 cam_status status;
397
398 cgd = (struct ccb_getdev *)arg;
e9936c96
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399 if (cgd == NULL)
400 break;
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401
402 if (SID_TYPE(&cgd->inq_data) != T_PROCESSOR)
403 break;
404
405 /*
406 * Allocate a peripheral instance for
407 * this device and start the probe
408 * process.
409 */
410 status = cam_periph_alloc(ptctor, ptoninvalidate, ptdtor,
411 ptstart, "pt", CAM_PERIPH_BIO,
412 cgd->ccb_h.path, ptasync,
413 AC_FOUND_DEVICE, cgd);
414
415 if (status != CAM_REQ_CMP
416 && status != CAM_REQ_INPROG)
85f8e2ea 417 kprintf("ptasync: Unable to attach to new device "
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418 "due to status 0x%x\n", status);
419 break;
420 }
421 case AC_SENT_BDR:
422 case AC_BUS_RESET:
423 {
424 struct pt_softc *softc;
425 struct ccb_hdr *ccbh;
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426
427 softc = (struct pt_softc *)periph->softc;
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428 /*
429 * Don't fail on the expected unit attention
430 * that will occur.
431 */
432 softc->flags |= PT_FLAG_RETRY_UA;
1c8b7a9a 433 LIST_FOREACH(ccbh, &softc->pending_ccbs, periph_links.le)
984263bc 434 ccbh->ccb_state |= PT_CCB_RETRY_UA;
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435 /* FALLTHROUGH */
436 }
437 default:
438 cam_periph_async(periph, code, path, arg);
439 break;
440 }
441}
442
443static void
444ptstart(struct cam_periph *periph, union ccb *start_ccb)
445{
446 struct pt_softc *softc;
447 struct buf *bp;
81b5c339 448 struct bio *bio;
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449
450 softc = (struct pt_softc *)periph->softc;
451
452 /*
453 * See if there is a buf with work for us to do..
454 */
81b5c339 455 bio = bioq_first(&softc->bio_queue);
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456 if (periph->immediate_priority <= periph->pinfo.priority) {
457 CAM_DEBUG_PRINT(CAM_DEBUG_SUBTRACE,
458 ("queuing for immediate ccb\n"));
459 start_ccb->ccb_h.ccb_state = PT_CCB_WAITING;
460 SLIST_INSERT_HEAD(&periph->ccb_list, &start_ccb->ccb_h,
461 periph_links.sle);
462 periph->immediate_priority = CAM_PRIORITY_NONE;
984263bc 463 wakeup(&periph->ccb_list);
81b5c339 464 } else if (bio == NULL) {
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465 xpt_release_ccb(start_ccb);
466 } else {
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467 bioq_remove(&softc->bio_queue, bio);
468 bp = bio->bio_buf;
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469
470 devstat_start_transaction(&softc->device_stats);
471
472 scsi_send_receive(&start_ccb->csio,
473 /*retries*/4,
474 ptdone,
475 MSG_SIMPLE_Q_TAG,
10f3fee5 476 (bp->b_cmd == BUF_CMD_READ),
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477 /*byte2*/0,
478 bp->b_bcount,
479 bp->b_data,
480 /*sense_len*/SSD_FULL_SIZE,
481 /*timeout*/softc->io_timeout);
482
3f499af5 483 start_ccb->ccb_h.ccb_state = PT_CCB_BUFFER_IO_UA;
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484
485 /*
486 * Block out any asyncronous callbacks
487 * while we touch the pending ccb list.
488 */
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489 LIST_INSERT_HEAD(&softc->pending_ccbs, &start_ccb->ccb_h,
490 periph_links.le);
984263bc 491
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492 start_ccb->ccb_h.ccb_bio = bio;
493 bio = bioq_first(&softc->bio_queue);
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494
495 xpt_action(start_ccb);
496
81b5c339 497 if (bio != NULL) {
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498 /* Have more work to do, so ensure we stay scheduled */
499 xpt_schedule(periph, /* XXX priority */1);
500 }
501 }
502}
503
504static void
505ptdone(struct cam_periph *periph, union ccb *done_ccb)
506{
507 struct pt_softc *softc;
508 struct ccb_scsiio *csio;
509
510 softc = (struct pt_softc *)periph->softc;
511 csio = &done_ccb->csio;
512 switch (csio->ccb_h.ccb_state) {
513 case PT_CCB_BUFFER_IO:
514 case PT_CCB_BUFFER_IO_UA:
515 {
516 struct buf *bp;
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517 struct bio *bio;
518
519 bio = (struct bio *)done_ccb->ccb_h.ccb_bio;
520 bp = bio->bio_buf;
984263bc 521
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522 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
523 int error;
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524 int sf;
525
526 if ((csio->ccb_h.ccb_state & PT_CCB_RETRY_UA) != 0)
527 sf = SF_RETRY_UA;
528 else
529 sf = 0;
530
b05e84c9
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531 error = pterror(done_ccb, CAM_RETRY_SELTO, sf);
532 if (error == ERESTART) {
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533 /*
534 * A retry was scheuled, so
535 * just return.
536 */
537 return;
538 }
539 if (error != 0) {
540 struct buf *q_bp;
81b5c339 541 struct bio *q_bio;
984263bc 542
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543 if (error == ENXIO) {
544 /*
545 * Catastrophic error. Mark our device
546 * as invalid.
547 */
1c8b7a9a
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548 xpt_print(periph->path,
549 "Invalidating device\n");
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550 softc->flags |= PT_FLAG_DEVICE_INVALID;
551 }
552
553 /*
554 * return all queued I/O with EIO, so that
555 * the client can retry these I/Os in the
556 * proper order should it attempt to recover.
557 */
81b5c339 558 while ((q_bio = bioq_first(&softc->bio_queue))
984263bc 559 != NULL) {
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560 bioq_remove(&softc->bio_queue, q_bio);
561 q_bp = q_bio->bio_buf;
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562 q_bp->b_resid = q_bp->b_bcount;
563 q_bp->b_error = EIO;
564 q_bp->b_flags |= B_ERROR;
81b5c339 565 biodone(q_bio);
984263bc 566 }
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567 bp->b_error = error;
568 bp->b_resid = bp->b_bcount;
569 bp->b_flags |= B_ERROR;
570 } else {
571 bp->b_resid = csio->resid;
572 bp->b_error = 0;
573 if (bp->b_resid != 0) {
574 /* Short transfer ??? */
575 bp->b_flags |= B_ERROR;
576 }
577 }
578 if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
579 cam_release_devq(done_ccb->ccb_h.path,
580 /*relsim_flags*/0,
581 /*reduction*/0,
582 /*timeout*/0,
583 /*getcount_only*/0);
584 } else {
585 bp->b_resid = csio->resid;
586 if (bp->b_resid != 0)
587 bp->b_flags |= B_ERROR;
588 }
589
590 /*
591 * Block out any asyncronous callbacks
592 * while we touch the pending ccb list.
593 */
984263bc 594 LIST_REMOVE(&done_ccb->ccb_h, periph_links.le);
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595
596 devstat_end_transaction_buf(&softc->device_stats, bp);
81b5c339 597 biodone(bio);
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598 break;
599 }
600 case PT_CCB_WAITING:
601 /* Caller will release the CCB */
602 wakeup(&done_ccb->ccb_h.cbfcnp);
603 return;
604 }
605 xpt_release_ccb(done_ccb);
606}
607
608static int
609pterror(union ccb *ccb, u_int32_t cam_flags, u_int32_t sense_flags)
610{
611 struct pt_softc *softc;
612 struct cam_periph *periph;
613
614 periph = xpt_path_periph(ccb->ccb_h.path);
615 softc = (struct pt_softc *)periph->softc;
616
617 return(cam_periph_error(ccb, cam_flags, sense_flags,
618 &softc->saved_ccb));
619}
620
621static int
fef8985e 622ptioctl(struct dev_ioctl_args *ap)
984263bc 623{
b13267a5 624 cdev_t dev = ap->a_head.a_dev;
fef8985e 625 caddr_t addr = ap->a_data;
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626 struct cam_periph *periph;
627 struct pt_softc *softc;
628 int unit;
1c8b7a9a 629 int error = 0;
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630
631 unit = minor(dev);
632 periph = cam_extend_get(ptperiphs, unit);
633
634 if (periph == NULL)
635 return(ENXIO);
636
637 softc = (struct pt_softc *)periph->softc;
638
1c8b7a9a 639 cam_periph_lock(periph);
984263bc 640
fef8985e 641 switch(ap->a_cmd) {
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642 case PTIOCGETTIMEOUT:
643 if (softc->io_timeout >= 1000)
644 *(int *)addr = softc->io_timeout / 1000;
645 else
646 *(int *)addr = 0;
647 break;
648 case PTIOCSETTIMEOUT:
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649 if (*(int *)addr < 1) {
650 error = EINVAL;
651 break;
652 }
653
984263bc 654 softc->io_timeout = *(int *)addr * 1000;
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655
656 break;
984263bc 657 default:
fef8985e 658 error = cam_periph_ioctl(periph, ap->a_cmd, addr, pterror);
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659 break;
660 }
661
662 cam_periph_unlock(periph);
663
664 return(error);
665}
666
667void
668scsi_send_receive(struct ccb_scsiio *csio, u_int32_t retries,
669 void (*cbfcnp)(struct cam_periph *, union ccb *),
670 u_int tag_action, int readop, u_int byte2,
671 u_int32_t xfer_len, u_int8_t *data_ptr, u_int8_t sense_len,
672 u_int32_t timeout)
673{
674 struct scsi_send_receive *scsi_cmd;
675
676 scsi_cmd = (struct scsi_send_receive *)&csio->cdb_io.cdb_bytes;
677 scsi_cmd->opcode = readop ? RECEIVE : SEND;
678 scsi_cmd->byte2 = byte2;
679 scsi_ulto3b(xfer_len, scsi_cmd->xfer_len);
680 scsi_cmd->control = 0;
681
682 cam_fill_csio(csio,
683 retries,
684 cbfcnp,
685 /*flags*/readop ? CAM_DIR_IN : CAM_DIR_OUT,
686 tag_action,
687 data_ptr,
688 xfer_len,
689 sense_len,
690 sizeof(*scsi_cmd),
691 timeout);
692}