Add a timings line for UDMA6 in two places. The drivers in question may or
[dragonfly.git] / sys / dev / disk / nata / atapi-cam.c
CommitLineData
c1b3d7c5
TS
1/*-
2 * Copyright (c) 2001-2003 Thomas Quinot <thomas@cuivre.fr.eu.org>
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. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. 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 ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * $FreeBSD: src/sys/dev/ata/atapi-cam.c,v 1.44 2006/03/31 08:09:05 sos Exp $
dbcd0c9b 29 * $DragonFly: src/sys/dev/disk/nata/atapi-cam.c,v 1.5 2007/05/01 00:05:17 dillon Exp $
c1b3d7c5
TS
30 */
31
32#include "opt_ata.h"
d6aaf612 33#include "opt_scsi.h"
c1b3d7c5
TS
34
35#include <sys/param.h>
36#include <sys/bus.h>
37#include <sys/libkern.h>
38#include <sys/lock.h> /* for {get,rel}_mplock() */
39#include <sys/malloc.h>
40#include <sys/module.h>
41#include <sys/nata.h>
42#include <sys/spinlock.h>
43#include <sys/spinlock2.h>
44#include <sys/queue.h>
45#include <sys/systm.h>
46#include <sys/thread2.h>
47
48#include <bus/cam/cam.h>
49#include <bus/cam/cam_ccb.h>
50#include <bus/cam/cam_periph.h>
51#include <bus/cam/cam_sim.h>
52#include <bus/cam/cam_xpt_sim.h>
53#include <bus/cam/cam_debug.h>
54#include <bus/cam/scsi/scsi_all.h>
55
56#include "ata-all.h"
c1b3d7c5
TS
57#include "ata_if.h"
58
59/* private data associated with an ATA bus */
60struct atapi_xpt_softc {
61 struct ata_device atapi_cam_dev; /* must be first */
62 device_t dev;
63 device_t parent;
64 struct ata_channel *ata_ch;
65 struct cam_path *path;
66 struct cam_sim *sim;
67 int flags;
68#define BUS_REGISTERED 0x01
69#define RESOURCE_SHORTAGE 0x02
70#define DETACHING 0x04
71
72 TAILQ_HEAD(,atapi_hcb) pending_hcbs;
73 struct ata_device *atadev[2];
74 struct spinlock state_lock;
75};
76
77/* hardware command descriptor block */
78struct atapi_hcb {
79 struct atapi_xpt_softc *softc;
80 int unit;
81 int bus;
82 int target;
83 int lun;
84 union ccb *ccb;
85 int flags;
86#define QUEUED 0x0001
87#define AUTOSENSE 0x0002
88 char *dxfer_alloc;
89 TAILQ_ENTRY(atapi_hcb) chain;
90};
91
dbcd0c9b 92enum reinit_reason { ATTACH, RESET };
c1b3d7c5
TS
93
94/* Device methods */
95static void atapi_cam_identify(device_t *dev, device_t parent);
96static int atapi_cam_probe(device_t dev);
97static int atapi_cam_attach(device_t dev);
98static int atapi_cam_detach(device_t dev);
99static int atapi_cam_reinit(device_t dev);
100
101/* CAM XPT methods */
102static void atapi_action(struct cam_sim *, union ccb *);
103static void atapi_poll(struct cam_sim *);
104static void atapi_async(void *, u_int32_t, struct cam_path *, void *);
105static void atapi_cb(struct ata_request *);
106
107/* Module methods */
108static int atapi_cam_event_handler(module_t mod, int what, void *arg);
109
110/* internal functions */
111static void reinit_bus(struct atapi_xpt_softc *scp, enum reinit_reason reason);
112static void setup_async_cb(struct atapi_xpt_softc *, uint32_t);
113static void cam_rescan_callback(struct cam_periph *, union ccb *);
114static void cam_rescan(struct cam_sim *);
115static void free_hcb_and_ccb_done(struct atapi_hcb *, u_int32_t);
116static struct atapi_hcb *allocate_hcb(struct atapi_xpt_softc *, int, int, union ccb *);
117static void free_hcb(struct atapi_hcb *hcb);
118static void free_softc(struct atapi_xpt_softc *scp);
119
120static MALLOC_DEFINE(M_ATACAM, "ata_cam", "ATA driver CAM-XPT layer");
121
122static device_method_t atapi_cam_methods[] = {
123 DEVMETHOD(device_identify, atapi_cam_identify),
124 DEVMETHOD(device_probe, atapi_cam_probe),
125 DEVMETHOD(device_attach, atapi_cam_attach),
126 DEVMETHOD(device_detach, atapi_cam_detach),
127 DEVMETHOD(ata_reinit, atapi_cam_reinit),
128 {0, 0}
129};
130
131static driver_t atapi_cam_driver = {
132 "atapicam",
133 atapi_cam_methods,
134 sizeof(struct atapi_xpt_softc)
135};
136
137static devclass_t atapi_cam_devclass;
138DRIVER_MODULE(atapicam, ata,
139 atapi_cam_driver,
140 atapi_cam_devclass,
141 atapi_cam_event_handler,
142 /*arg*/NULL);
143MODULE_VERSION(atapicam, 1);
144MODULE_DEPEND(atapicam, ata, 1, 1, 1);
145MODULE_DEPEND(atapicam, cam, 1, 1, 1);
146
147static void
148atapi_cam_identify(device_t *dev, device_t parent)
149{
150 struct atapi_xpt_softc *scp =
151 kmalloc(sizeof(struct atapi_xpt_softc), M_ATACAM, M_NOWAIT|M_ZERO);
152 device_t child;
153
154 if (scp == NULL) {
155 /* XXX TGEN Use device_printf()? */
e3869ec7 156 kprintf("atapi_cam_identify: out of memory");
c1b3d7c5
TS
157 return;
158 }
159
160 /* Assume one atapicam instance per parent channel instance. */
161 child = device_add_child(parent, "atapicam", -1);
162 if (child == NULL) {
163 /* XXX TGEN Use device_printf()? */
e3869ec7 164 kprintf("atapi_cam_identify: out of memory, can't add child");
c1b3d7c5
TS
165 kfree(scp, M_ATACAM);
166 return;
167 }
168 scp->atapi_cam_dev.unit = -1;
169 scp->atapi_cam_dev.dev = child;
170 device_quiet(child);
171 device_set_softc(child, scp);
172}
173
174static int
175atapi_cam_probe(device_t dev)
176{
177 struct ata_device *atadev = device_get_softc (dev);
178
179 KASSERT(atadev != NULL, ("expect valid struct ata_device"));
180 if (atadev->unit < 0) {
181 device_set_desc(dev, "ATAPI CAM Attachment");
182 return(0);
183 } else {
184 return ENXIO;
185 }
186}
187
188static int
189atapi_cam_attach(device_t dev)
190{
191 struct atapi_xpt_softc *scp = NULL;
192 struct cam_devq *devq = NULL;
193 struct cam_sim *sim = NULL;
194 struct cam_path *path = NULL;
195 int unit, error;
196
197 scp = (struct atapi_xpt_softc *)device_get_softc(dev);
198 if (scp == NULL) {
199 device_printf(dev, "Cannot get softc\n");
200 return ENOMEM;
201 }
202
203 spin_init(&scp->state_lock);
204
205 scp->dev = dev;
206 scp->parent = device_get_parent(dev);
207 scp->ata_ch = device_get_softc(scp->parent);
208 TAILQ_INIT(&scp->pending_hcbs);
209 unit = device_get_unit(dev);
210
211 if ((devq = cam_simq_alloc(16)) == NULL) {
212 error = ENOMEM;
213 goto out;
214 }
215
216 if ((sim = cam_sim_alloc(atapi_action, atapi_poll, "ata",
217 (void *)scp, unit, 1, 1, devq)) == NULL) {
218 error = ENOMEM;
219 goto out;
220 }
221 scp->sim = sim;
222
223 if (xpt_bus_register(sim, 0) != CAM_SUCCESS) {
224 error = EINVAL;
225 goto out;
226 }
227 scp->flags |= BUS_REGISTERED;
228
229 if (xpt_create_path(&path, /*periph*/ NULL,
230 cam_sim_path(sim), CAM_TARGET_WILDCARD,
231 CAM_LUN_WILDCARD) != CAM_REQ_CMP) {
232 error = ENOMEM;
233 goto out;
234 }
235 scp->path = path;
236
237 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("Registered SIM for ata%d\n", unit));
238
239 setup_async_cb(scp, AC_LOST_DEVICE);
dbcd0c9b 240 reinit_bus(scp, ATTACH);
c1b3d7c5
TS
241 error = 0;
242
243out:
244 if (error != 0)
245 free_softc(scp);
246
247 return(error);
248}
249
250static int
251atapi_cam_detach(device_t dev)
252{
253 struct atapi_xpt_softc *scp = device_get_softc(dev);
254
255 get_mplock();
256 xpt_freeze_simq(scp->sim, 1 /*count*/);
257 rel_mplock();
258 spin_lock_wr(&scp->state_lock);
259 scp->flags |= DETACHING;
260 spin_unlock_wr(&scp->state_lock);
261 free_softc(scp);
262 return (0);
263}
264
265static int
266atapi_cam_reinit(device_t dev) {
267 struct atapi_xpt_softc *scp = device_get_softc(dev);
268
269 /*
270 * scp might be null if the bus is being reinitialised during
271 * the boot-up sequence, before the ATAPI bus is registered.
272 */
273
274 if (scp != NULL) {
275 reinit_bus(scp, RESET);
276 }
277 return 0;
278}
279
280static void
281reinit_bus(struct atapi_xpt_softc *scp, enum reinit_reason reason) {
282 struct ata_device *atadev;
283 device_t *children;
284 int nchildren, i;
285
286 if (device_get_children(scp->parent, &children, &nchildren) != 0) {
287 return;
288 }
289
290 spin_lock_wr(&scp->state_lock);
291 scp->atadev[0] = NULL;
292 scp->atadev[1] = NULL;
293
294 for (i = 0; i < nchildren; i++) {
295 /* XXX Does the child need to actually be attached yet? */
296 if (children[i] != NULL) {
297 atadev = device_get_softc(children[i]);
298 if ((atadev->unit == ATA_MASTER) &&
299 (scp->ata_ch->devices & ATA_ATAPI_MASTER) != 0)
300 scp->atadev[0] = atadev;
301 if ((atadev->unit == ATA_SLAVE) &&
302 (scp->ata_ch->devices & ATA_ATAPI_SLAVE) != 0)
303 scp->atadev[1] = atadev;
304 }
305 }
306 spin_unlock_wr(&scp->state_lock);
307 kfree(children, M_TEMP);
308
309 switch (reason) {
c1b3d7c5
TS
310 case RESET:
311 xpt_async(AC_BUS_RESET, scp->path, NULL);
312 /*FALLTHROUGH*/
313 case ATTACH:
314 cam_rescan(scp->sim);
315 break;
316 }
317}
318
319static void
320setup_async_cb(struct atapi_xpt_softc *scp, uint32_t events)
321{
322 struct ccb_setasync csa;
323
324 get_mplock();
325 xpt_setup_ccb(&csa.ccb_h, scp->path, /*priority*/ 5);
326 csa.ccb_h.func_code = XPT_SASYNC_CB;
327 csa.event_enable = events;
328 csa.callback = &atapi_async;
329 csa.callback_arg = scp->sim;
330 xpt_action((union ccb *) &csa);
331 rel_mplock();
332}
333
334static void
335atapi_action(struct cam_sim *sim, union ccb *ccb)
336{
337 struct atapi_xpt_softc *softc = (struct atapi_xpt_softc*)cam_sim_softc(sim);
338 struct ccb_hdr *ccb_h = &ccb->ccb_h;
339 struct atapi_hcb *hcb = NULL;
340 struct ata_request *request = NULL;
341 int unit = cam_sim_unit(sim);
342 int bus = cam_sim_bus(sim);
343 int len;
344 char *buf;
345
346 switch (ccb_h->func_code) {
347 case XPT_PATH_INQ: {
348 struct ccb_pathinq *cpi = &ccb->cpi;
349 int tid = ccb_h->target_id;
350
351 cpi->version_num = 1;
352 cpi->hba_inquiry = 0;
353 cpi->target_sprt = 0;
354 cpi->hba_misc = PIM_NO_6_BYTE;
355 cpi->hba_eng_cnt = 0;
356 bzero(cpi->vuhba_flags, sizeof(cpi->vuhba_flags));
357 cpi->max_target = 1;
358 cpi->max_lun = 0;
359 cpi->async_flags = 0;
360 cpi->hpath_id = 0;
361 cpi->initiator_id = 7;
362 strncpy(cpi->sim_vid, "FreeBSD", sizeof(cpi->sim_vid));
363 strncpy(cpi->hba_vid, "ATAPI", sizeof(cpi->hba_vid));
364 strncpy(cpi->dev_name, cam_sim_name(sim), sizeof cpi->dev_name);
365 cpi->unit_number = cam_sim_unit(sim);
366 cpi->bus_id = cam_sim_bus(sim);
367 cpi->base_transfer_speed = 3300;
368
369 if (softc->ata_ch && tid != CAM_TARGET_WILDCARD) {
370 spin_lock_wr(&softc->state_lock);
371 if (softc->atadev[tid] == NULL) {
372 ccb->ccb_h.status = CAM_DEV_NOT_THERE;
373 xpt_done(ccb);
374 spin_unlock_wr(&softc->state_lock);
375 return;
376 }
377 switch (softc->atadev[ccb_h->target_id]->mode) {
378 case ATA_PIO1:
379 cpi->base_transfer_speed = 5200;
380 break;
381 case ATA_PIO2:
382 cpi->base_transfer_speed = 7000;
383 break;
384 case ATA_PIO3:
385 cpi->base_transfer_speed = 11000;
386 break;
387 case ATA_PIO4:
388 case ATA_DMA:
389 case ATA_WDMA2:
390 cpi->base_transfer_speed = 16000;
391 break;
392 case ATA_UDMA2:
393 cpi->base_transfer_speed = 33000;
394 break;
395 case ATA_UDMA4:
396 cpi->base_transfer_speed = 66000;
397 break;
398 case ATA_UDMA5:
399 cpi->base_transfer_speed = 100000;
400 break;
401 case ATA_UDMA6:
402 cpi->base_transfer_speed = 133000;
403 break;
404 default:
405 break;
406 }
407 spin_unlock_wr(&softc->state_lock);
408 }
409 ccb->ccb_h.status = CAM_REQ_CMP;
410 xpt_done(ccb);
411 return;
412 }
413
414 case XPT_RESET_DEV: {
415 int tid = ccb_h->target_id;
416
417 CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_SUBTRACE, ("dev reset\n"));
418 ata_controlcmd(softc->atadev[tid]->dev, ATA_DEVICE_RESET, 0, 0, 0);
419 ccb->ccb_h.status = CAM_REQ_CMP;
420 xpt_done(ccb);
421 return;
422 }
423
424 case XPT_RESET_BUS:
425 CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_SUBTRACE, ("bus reset\n"));
426 ata_reinit(softc->parent);
427 ccb->ccb_h.status = CAM_REQ_CMP;
428 xpt_done(ccb);
429 return;
430
431 case XPT_SET_TRAN_SETTINGS:
432 /* ignore these, we're not doing SCSI here */
433 CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_SUBTRACE,
434 ("SET_TRAN_SETTINGS not supported\n"));
435 ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
436 xpt_done(ccb);
437 return;
438
439 case XPT_GET_TRAN_SETTINGS: {
440 struct ccb_trans_settings *cts = &ccb->cts;
441
442 /*
443 * XXX The default CAM transport code is very SCSI-specific and
444 * doesn't understand IDE speeds very well. Be silent about it
445 * here and let it default to what is set in XPT_PATH_INQ
446 */
447 CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_SUBTRACE, ("GET_TRAN_SETTINGS\n"));
448 cts->valid = (CCB_TRANS_DISC_VALID | CCB_TRANS_TQ_VALID);
449 cts->flags &= ~(CCB_TRANS_DISC_ENB | CCB_TRANS_TAG_ENB);
450 ccb->ccb_h.status = CAM_REQ_CMP;
451 xpt_done(ccb);
452 return;
453 }
454
455 case XPT_CALC_GEOMETRY: {
456 CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_SUBTRACE, ("CALC_GEOMETRY\n"));
457 cam_calc_geometry(&ccb->ccg, /*extended*/1);
458 xpt_done(ccb);
459 return;
460 }
461
462 case XPT_SCSI_IO: {
463 struct ccb_scsiio *csio = &ccb->csio;
464 int tid = ccb_h->target_id, lid = ccb_h->target_lun;
465 int request_flags = ATA_R_QUIET | ATA_R_ATAPI;
466
467 CAM_DEBUG(ccb_h->path, CAM_DEBUG_SUBTRACE, ("XPT_SCSI_IO\n"));
468
469 spin_lock_wr(&softc->state_lock);
470 if (softc->flags & DETACHING) {
471 ccb->ccb_h.status = CAM_REQ_ABORTED;
472 xpt_done(ccb);
473 spin_unlock_wr(&softc->state_lock);
474 return;
475 }
476
477 if (softc->atadev[tid] == NULL) {
478 ccb->ccb_h.status = CAM_DEV_NOT_THERE;
479 xpt_done(ccb);
480 spin_unlock_wr(&softc->state_lock);
481 return;
482 }
483
484 /* check that this request was not aborted already */
485 if ((ccb_h->status & CAM_STATUS_MASK) != CAM_REQ_INPROG) {
e3869ec7 486 kprintf("XPT_SCSI_IO received but already in progress?\n");
c1b3d7c5
TS
487 xpt_done(ccb);
488 spin_unlock_wr(&softc->state_lock);
489 return;
490 }
491 if (lid > 0) {
492 CAM_DEBUG(ccb_h->path, CAM_DEBUG_SUBTRACE,
493 ("SCSI IO received for invalid lun %d\n", lid));
494 goto action_invalid;
495 }
496 if (csio->cdb_len > sizeof request->u.atapi.ccb) {
497 CAM_DEBUG(ccb_h->path, CAM_DEBUG_SUBTRACE,
498 ("CAM CCB too long for ATAPI"));
499 goto action_invalid;
500 }
501 if ((ccb_h->flags & CAM_SCATTER_VALID)) {
502 /* scatter-gather not supported */
503 xpt_print_path(ccb_h->path);
e3869ec7 504 kprintf("ATAPI/CAM does not support scatter-gather yet!\n");
c1b3d7c5
TS
505 goto action_invalid;
506 }
507
508 switch (ccb_h->flags & CAM_DIR_MASK) {
509 case CAM_DIR_IN:
510 request_flags |= ATA_R_READ|ATA_R_DMA;
511 break;
512 case CAM_DIR_OUT:
513 request_flags |= ATA_R_WRITE|ATA_R_DMA;
514 break;
515 case CAM_DIR_NONE:
516 /* No flags need to be set */
517 break;
518 default:
519 device_printf(softc->dev, "unknown IO operation\n");
520 goto action_invalid;
521 }
522 if (softc->atadev[tid]->mode < ATA_DMA)
523 request_flags &= ~ATA_R_DMA;
524
525 if ((hcb = allocate_hcb(softc, unit, bus, ccb)) == NULL) {
e3869ec7 526 kprintf("cannot allocate ATAPI/CAM hcb\n");
c1b3d7c5
TS
527 goto action_oom;
528 }
529 if ((request = ata_alloc_request()) == NULL) {
e3869ec7 530 kprintf("cannot allocate ATAPI/CAM request\n");
c1b3d7c5
TS
531 goto action_oom;
532 }
533
534 bcopy((ccb_h->flags & CAM_CDB_POINTER) ?
535 csio->cdb_io.cdb_ptr : csio->cdb_io.cdb_bytes,
536 request->u.atapi.ccb, csio->cdb_len);
537#ifdef CAMDEBUG
538 if (CAM_DEBUGGED(ccb_h->path, CAM_DEBUG_CDB)) {
539 char cdb_str[(SCSI_MAX_CDBLEN * 3) + 1];
540
e3869ec7 541 kprintf("atapi_action: hcb@%p: %s\n", hcb,
c1b3d7c5
TS
542 scsi_cdb_string(request->u.atapi.ccb, cdb_str, sizeof(cdb_str)));
543 }
544#endif
545
546 len = csio->dxfer_len;
547 buf = csio->data_ptr;
548
549 /* some SCSI commands require special processing */
550 switch (request->u.atapi.ccb[0]) {
551 case INQUIRY: {
552 /*
553 * many ATAPI devices seem to report more than
554 * SHORT_INQUIRY_LENGTH bytes of available INQUIRY
555 * information, but respond with some incorrect condition
556 * when actually asked for it, so we are going to pretend
557 * that only SHORT_INQUIRY_LENGTH are expected, anyway.
558 */
559 struct scsi_inquiry *inq = (struct scsi_inquiry *) &request->u.atapi.ccb[0];
560
561 if (inq->byte2 == 0 && inq->page_code == 0 &&
562 inq->length > SHORT_INQUIRY_LENGTH) {
563 bzero(buf, len);
564 len = inq->length = SHORT_INQUIRY_LENGTH;
565 }
566 break;
567 }
568 case READ_6:
569 /* FALLTHROUGH */
570
571 case WRITE_6:
572 CAM_DEBUG(ccb_h->path, CAM_DEBUG_SUBTRACE,
573 ("Translating %s into _10 equivalent\n",
574 (request->u.atapi.ccb[0] == READ_6) ? "READ_6" : "WRITE_6"));
575 request->u.atapi.ccb[0] |= 0x20;
576 request->u.atapi.ccb[9] = request->u.atapi.ccb[5];
577 request->u.atapi.ccb[8] = request->u.atapi.ccb[4];
578 request->u.atapi.ccb[7] = 0;
579 request->u.atapi.ccb[6] = 0;
580 request->u.atapi.ccb[5] = request->u.atapi.ccb[3];
581 request->u.atapi.ccb[4] = request->u.atapi.ccb[2];
582 request->u.atapi.ccb[3] = request->u.atapi.ccb[1] & 0x1f;
583 request->u.atapi.ccb[2] = 0;
584 request->u.atapi.ccb[1] = 0;
585 break;
586 }
587
588 if ((ccb_h->flags & CAM_DIR_MASK) == CAM_DIR_IN && (len & 1)) {
589 /* ATA always transfers an even number of bytes */
590 if ((buf = hcb->dxfer_alloc
591 = kmalloc(++len, M_ATACAM, M_NOWAIT | M_ZERO)) == NULL) {
e3869ec7 592 kprintf("cannot allocate ATAPI/CAM buffer\n");
c1b3d7c5
TS
593 goto action_oom;
594 }
595 }
596 request->dev = softc->atadev[tid]->dev;
597 request->driver = hcb;
598 request->data = buf;
599 request->bytecount = len;
600 request->transfersize = min(request->bytecount, 65534);
601 request->timeout = ccb_h->timeout / 1000; /* XXX lost granularity */
602 request->retries = 2;
603 request->callback = &atapi_cb;
604 request->flags = request_flags;
605
606 TAILQ_INSERT_TAIL(&softc->pending_hcbs, hcb, chain);
607 hcb->flags |= QUEUED;
608 ccb_h->status |= CAM_SIM_QUEUED;
609 spin_unlock_wr(&softc->state_lock);
610
611 ata_queue_request(request);
612 return;
613 }
614
615 default:
616 CAM_DEBUG(ccb_h->path, CAM_DEBUG_SUBTRACE,
617 ("unsupported function code 0x%02x\n", ccb_h->func_code));
618 goto action_invalid;
619 }
620
621 /* NOTREACHED */
622
623action_oom:
624 if (request != NULL)
625 ata_free_request(request);
626 if (hcb != NULL)
627 free_hcb(hcb);
628 spin_unlock_wr(&softc->state_lock);
629 get_mplock();
630 xpt_print_path(ccb_h->path);
e3869ec7 631 kprintf("out of memory, freezing queue.\n");
c1b3d7c5
TS
632 softc->flags |= RESOURCE_SHORTAGE;
633 xpt_freeze_simq(sim, /*count*/ 1);
634 rel_mplock();
635 ccb_h->status = CAM_REQUEUE_REQ;
636 xpt_done(ccb);
637 return;
638
639action_invalid:
640 spin_unlock_wr(&softc->state_lock);
641 ccb_h->status = CAM_REQ_INVALID;
642 xpt_done(ccb);
643 return;
644}
645
646static void
647atapi_poll(struct cam_sim *sim)
648{
649 /* do nothing - we do not actually service any interrupts */
e3869ec7 650 kprintf("atapi_poll called!\n");
c1b3d7c5
TS
651}
652
653static void
654atapi_cb(struct ata_request *request)
655{
656 struct atapi_xpt_softc *scp;
657 struct atapi_hcb *hcb;
658 struct ccb_scsiio *csio;
659 u_int32_t rc;
660
661 hcb = (struct atapi_hcb *)request->driver;
662 scp = hcb->softc;
663 csio = &hcb->ccb->csio;
664
665#ifdef CAMDEBUG
666# define err (request->u.atapi.sense.key)
667 if (CAM_DEBUGGED(csio->ccb_h.path, CAM_DEBUG_CDB)) {
e3869ec7 668 kprintf("atapi_cb: hcb@%p error = %02x: (sk = %02x%s%s%s)\n",
c1b3d7c5
TS
669 hcb, err, err >> 4,
670 (err & 4) ? " ABRT" : "",
671 (err & 2) ? " EOM" : "",
672 (err & 1) ? " ILI" : "");
e3869ec7 673 kprintf("dev %s: cmd %02x status %02x result %02x\n",
c1b3d7c5
TS
674 device_get_nameunit(request->dev), request->u.atapi.ccb[0],
675 request->status, request->result);
676 }
677#endif
678
679 if ((hcb->flags & AUTOSENSE) != 0) {
680 rc = CAM_SCSI_STATUS_ERROR;
681 if (request->result == 0) {
682 csio->ccb_h.status |= CAM_AUTOSNS_VALID;
683 }
684 } else if (request->result != 0) {
685 rc = CAM_SCSI_STATUS_ERROR;
686 csio->scsi_status = SCSI_STATUS_CHECK_COND;
687
688 if ((csio->ccb_h.flags & CAM_DIS_AUTOSENSE) == 0) {
689#if 0
690 static const int8_t ccb[16] = { ATAPI_REQUEST_SENSE, 0, 0, 0,
691 sizeof(struct atapi_sense), 0, 0, 0, 0, 0, 0,
692 0, 0, 0, 0, 0 };
693
694 bcopy (ccb, request->u.atapi.ccb, sizeof ccb);
695 request->data = (caddr_t)&csio->sense_data;
696 request->bytecount = sizeof(struct atapi_sense);
697 request->transfersize = min(request->bytecount, 65534);
698 request->timeout = csio->ccb_h.timeout / 1000;
699 request->retries = 2;
700 request->flags = ATA_R_QUIET|ATA_R_ATAPI|ATA_R_IMMEDIATE;
701 hcb->flags |= AUTOSENSE;
702
703 ata_queue_request(request);
704 return;
705#else
706 /* The ATA driver has already requested sense for us. */
707 if (request->error == 0) {
708 /* The ATA autosense suceeded. */
709 bcopy (&request->u.atapi.sense, &csio->sense_data, sizeof(struct atapi_sense));
710 csio->ccb_h.status |= CAM_AUTOSNS_VALID;
711 }
712#endif
713 }
714 } else {
715 rc = CAM_REQ_CMP;
716 csio->scsi_status = SCSI_STATUS_OK;
717 if (((csio->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN) &&
718 hcb->dxfer_alloc != NULL)
719 {
720 bcopy(hcb->dxfer_alloc, csio->data_ptr, csio->dxfer_len);
721 }
722 }
723
724 spin_lock_wr(&scp->state_lock);
725 free_hcb_and_ccb_done(hcb, rc);
726 spin_unlock_wr(&scp->state_lock);
727
728 ata_free_request(request);
729}
730
731static void
732free_hcb_and_ccb_done(struct atapi_hcb *hcb, u_int32_t status)
733{
734 struct atapi_xpt_softc *softc;
735 union ccb *ccb;
736
737 if (hcb == NULL)
738 return;
739
740 softc = hcb->softc;
741 ccb = hcb->ccb;
742
743 /* we're about to free a hcb, so the shortage has ended */
744 if (softc->flags & RESOURCE_SHORTAGE) {
745 softc->flags &= ~RESOURCE_SHORTAGE;
746 status |= CAM_RELEASE_SIMQ;
747 }
748 free_hcb(hcb);
749 ccb->ccb_h.status =
750 status | (ccb->ccb_h.status & ~(CAM_STATUS_MASK | CAM_SIM_QUEUED));
751 xpt_done(ccb);
752}
753
754static void
755atapi_async(void *callback_arg, u_int32_t code,
756 struct cam_path* path, void *arg)
757{
758 struct atapi_xpt_softc *softc;
759 struct cam_sim *sim;
760 int targ;
761
762 crit_enter();
763
764 sim = (struct cam_sim *) callback_arg;
765 softc = (struct atapi_xpt_softc *) cam_sim_softc(sim);
766 switch (code) {
767 case AC_LOST_DEVICE:
768 targ = xpt_path_target_id(path);
769 xpt_print_path(path);
770 if (targ == -1)
e3869ec7 771 kprintf("Lost host adapter\n");
c1b3d7c5 772 else
e3869ec7 773 kprintf("Lost target %d???\n", targ);
c1b3d7c5
TS
774 break;
775
776 default:
777 break;
778 }
779
780 crit_exit();
781}
782
783static void
784cam_rescan_callback(struct cam_periph *periph, union ccb *ccb)
785{
786 if (ccb->ccb_h.status != CAM_REQ_CMP) {
787 CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE,
788 ("Rescan failed, 0x%04x\n", ccb->ccb_h.status));
789 } else {
790 CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE,
791 ("Rescan succeeded\n"));
792 }
793 xpt_free_path(ccb->ccb_h.path);
794 kfree(ccb, M_ATACAM);
795}
796
797static void
798cam_rescan(struct cam_sim *sim)
799{
800 struct cam_path *path;
801 union ccb *ccb = kmalloc(sizeof(union ccb), M_ATACAM, M_WAITOK | M_ZERO);
802
803 get_mplock();
804 if (xpt_create_path(&path, xpt_periph, cam_sim_path(sim),
805 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD) != CAM_REQ_CMP) {
806 rel_mplock();
807 kfree(ccb, M_ATACAM);
808 return;
809 }
810
811 CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE, ("Rescanning ATAPI bus.\n"));
812 xpt_setup_ccb(&ccb->ccb_h, path, 5/*priority (low)*/);
813 ccb->ccb_h.func_code = XPT_SCAN_BUS;
814 ccb->ccb_h.cbfcnp = cam_rescan_callback;
815 ccb->crcn.flags = CAM_FLAG_NONE;
816 xpt_action(ccb);
817 /* scan is in progress now */
818 rel_mplock();
819}
820
821static struct atapi_hcb *
822allocate_hcb(struct atapi_xpt_softc *softc, int unit, int bus, union ccb *ccb)
823{
824 struct atapi_hcb *hcb = (struct atapi_hcb *)
825 kmalloc(sizeof(struct atapi_hcb), M_ATACAM, M_NOWAIT | M_ZERO);
826
827 if (hcb != NULL) {
828 hcb->softc = softc;
829 hcb->unit = unit;
830 hcb->bus = bus;
831 hcb->ccb = ccb;
832 }
833 return hcb;
834}
835
836static void
837free_hcb(struct atapi_hcb *hcb)
838{
839 if ((hcb->flags & QUEUED) != 0)
840 TAILQ_REMOVE(&hcb->softc->pending_hcbs, hcb, chain);
841 if (hcb->dxfer_alloc != NULL)
842 kfree(hcb->dxfer_alloc, M_ATACAM);
843 kfree(hcb, M_ATACAM);
844}
845
846static void
847free_softc(struct atapi_xpt_softc *scp)
848{
849 struct atapi_hcb *hcb;
850
851 if (scp != NULL) {
852 spin_lock_wr(&scp->state_lock);
853 TAILQ_FOREACH(hcb, &scp->pending_hcbs, chain) {
854 free_hcb_and_ccb_done(hcb, CAM_UNREC_HBA_ERROR);
855 }
856 spin_unlock_wr(&scp->state_lock);
857 get_mplock();
858 if (scp->path != NULL) {
859 setup_async_cb(scp, 0);
860 xpt_free_path(scp->path);
861 }
862 if ((scp->flags & BUS_REGISTERED) != 0) {
863 if (xpt_bus_deregister(cam_sim_path(scp->sim)) == CAM_REQ_CMP)
864 scp->flags &= ~BUS_REGISTERED;
865 }
866 if (scp->sim != NULL) {
867 if ((scp->flags & BUS_REGISTERED) == 0)
d6aaf612 868 cam_sim_free(scp->sim);
c1b3d7c5 869 else
e3869ec7 870 kprintf("Can't free %s SIM (still registered)\n",
c1b3d7c5
TS
871 cam_sim_name(scp->sim));
872 }
873 rel_mplock();
874 spin_uninit(&scp->state_lock);
875 }
876}
877
878static int
879atapi_cam_event_handler(module_t mod, int what, void *arg) {
880 device_t *devlist;
881 int devcount;
882
883 switch (what) {
884 case MOD_UNLOAD:
885 if (devclass_get_devices(atapi_cam_devclass, &devlist, &devcount)
886 != 0)
887 return ENXIO;
888 if (devlist != NULL) {
889 while (devlist != NULL && devcount > 0) {
890 device_t child = devlist[--devcount];
891 struct atapi_xpt_softc *scp = device_get_softc(child);
892
893 device_delete_child(device_get_parent(child),child);
894 if (scp != NULL)
895 kfree(scp, M_ATACAM);
896 }
897 kfree(devlist, M_TEMP);
898 }
899 break;
900
901 default:
902 break;
903 }
904 return 0;
905}