2 * Copyright (c) 2001-2003 Thomas Quinot <thomas@cuivre.fr.eu.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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.
28 * $FreeBSD: src/sys/dev/ata/atapi-cam.c,v 1.44 2006/03/31 08:09:05 sos Exp $
34 #include <sys/param.h>
36 #include <sys/libkern.h>
37 #include <sys/lock.h> /* for {get,rel}_mplock() */
38 #include <sys/malloc.h>
39 #include <sys/module.h>
41 #include <sys/spinlock.h>
42 #include <sys/queue.h>
43 #include <sys/systm.h>
45 #include <sys/thread2.h>
46 #include <sys/spinlock2.h>
47 #include <sys/mplock2.h>
49 #include <bus/cam/cam.h>
50 #include <bus/cam/cam_ccb.h>
51 #include <bus/cam/cam_periph.h>
52 #include <bus/cam/cam_sim.h>
53 #include <bus/cam/cam_xpt_sim.h>
54 #include <bus/cam/cam_debug.h>
55 #include <bus/cam/scsi/scsi_all.h>
60 /* private data associated with an ATA bus */
61 struct atapi_xpt_softc {
62 struct ata_device atapi_cam_dev; /* must be first */
65 struct ata_channel *ata_ch;
66 struct cam_path *path;
69 #define BUS_REGISTERED 0x01
70 #define RESOURCE_SHORTAGE 0x02
71 #define DETACHING 0x04
73 TAILQ_HEAD(,atapi_hcb) pending_hcbs;
74 struct ata_device *atadev[2];
75 struct spinlock state_lock;
78 /* hardware command descriptor block */
80 struct atapi_xpt_softc *softc;
88 #define AUTOSENSE 0x0002
90 TAILQ_ENTRY(atapi_hcb) chain;
93 enum reinit_reason { ATTACH, RESET };
96 static void atapi_cam_identify(device_t *dev, device_t parent);
97 static int atapi_cam_probe(device_t dev);
98 static int atapi_cam_attach(device_t dev);
99 static int atapi_cam_detach(device_t dev);
100 static int atapi_cam_reinit(device_t dev);
102 /* CAM XPT methods */
103 static void atapi_action(struct cam_sim *, union ccb *);
104 static void atapi_poll(struct cam_sim *);
105 static void atapi_async(void *, u_int32_t, struct cam_path *, void *);
106 static void atapi_cb(struct ata_request *);
109 static int atapi_cam_event_handler(module_t mod, int what, void *arg);
111 /* internal functions */
112 static void reinit_bus(struct atapi_xpt_softc *scp, enum reinit_reason reason);
113 static void setup_async_cb(struct atapi_xpt_softc *, uint32_t);
114 static void cam_rescan_callback(struct cam_periph *, union ccb *);
115 static void cam_rescan(struct cam_sim *);
116 static void free_hcb_and_ccb_done(struct atapi_hcb *, u_int32_t);
117 static struct atapi_hcb *allocate_hcb(struct atapi_xpt_softc *, int, int, union ccb *);
118 static void free_hcb(struct atapi_hcb *hcb);
119 static void free_softc(struct atapi_xpt_softc *scp);
121 static MALLOC_DEFINE(M_ATACAM, "ata_cam", "ATA driver CAM-XPT layer");
123 static device_method_t atapi_cam_methods[] = {
124 DEVMETHOD(device_identify, atapi_cam_identify),
125 DEVMETHOD(device_probe, atapi_cam_probe),
126 DEVMETHOD(device_attach, atapi_cam_attach),
127 DEVMETHOD(device_detach, atapi_cam_detach),
128 DEVMETHOD(ata_reinit, atapi_cam_reinit),
132 static driver_t atapi_cam_driver = {
135 sizeof(struct atapi_xpt_softc)
138 static devclass_t atapi_cam_devclass;
139 DRIVER_MODULE(atapicam, ata,
142 atapi_cam_event_handler,
144 MODULE_VERSION(atapicam, 1);
145 MODULE_DEPEND(atapicam, ata, 1, 1, 1);
146 MODULE_DEPEND(atapicam, cam, 1, 1, 1);
149 atapi_cam_identify(device_t *dev, device_t parent)
151 struct atapi_xpt_softc *scp =
152 kmalloc(sizeof(struct atapi_xpt_softc), M_ATACAM, M_INTWAIT|M_ZERO);
155 /* Assume one atapicam instance per parent channel instance. */
156 child = device_add_child(parent, "atapicam", -1);
158 /* XXX TGEN Use device_printf()? */
159 kprintf("atapi_cam_identify: out of memory, can't add child");
160 kfree(scp, M_ATACAM);
163 scp->atapi_cam_dev.unit = -1;
164 scp->atapi_cam_dev.dev = child;
166 device_set_softc(child, scp);
170 atapi_cam_probe(device_t dev)
172 struct ata_device *atadev = device_get_softc (dev);
174 KASSERT(atadev != NULL, ("expect valid struct ata_device"));
175 if (atadev->unit < 0) {
176 device_set_desc(dev, "ATAPI CAM Attachment");
184 atapi_cam_attach(device_t dev)
186 struct atapi_xpt_softc *scp = NULL;
187 struct cam_devq *devq = NULL;
188 struct cam_sim *sim = NULL;
189 struct cam_path *path = NULL;
192 scp = (struct atapi_xpt_softc *)device_get_softc(dev);
194 device_printf(dev, "Cannot get softc\n");
198 spin_init(&scp->state_lock, "atapicamattach");
201 scp->parent = device_get_parent(dev);
202 scp->ata_ch = device_get_softc(scp->parent);
203 TAILQ_INIT(&scp->pending_hcbs);
204 unit = device_get_unit(dev);
206 if ((devq = cam_simq_alloc(16)) == NULL) {
211 if ((sim = cam_sim_alloc(atapi_action, atapi_poll, "ata",
212 (void *)scp, unit, &sim_mplock, 1, 1, devq)) == NULL) {
218 if (xpt_bus_register(sim, 0) != CAM_SUCCESS) {
222 scp->flags |= BUS_REGISTERED;
224 if (xpt_create_path(&path, /*periph*/ NULL,
225 cam_sim_path(sim), CAM_TARGET_WILDCARD,
226 CAM_LUN_WILDCARD) != CAM_REQ_CMP) {
232 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("Registered SIM for ata%d\n", unit));
234 setup_async_cb(scp, AC_LOST_DEVICE);
235 reinit_bus(scp, ATTACH);
246 atapi_cam_detach(device_t dev)
248 struct atapi_xpt_softc *scp = device_get_softc(dev);
251 xpt_freeze_simq(scp->sim, 1 /*count*/);
253 spin_lock(&scp->state_lock);
254 scp->flags |= DETACHING;
255 spin_unlock(&scp->state_lock);
261 atapi_cam_reinit(device_t dev) {
262 struct atapi_xpt_softc *scp = device_get_softc(dev);
265 * scp might be null if the bus is being reinitialised during
266 * the boot-up sequence, before the ATAPI bus is registered.
270 reinit_bus(scp, RESET);
276 reinit_bus(struct atapi_xpt_softc *scp, enum reinit_reason reason) {
277 struct ata_device *old_atadev[2], *atadev;
279 int nchildren, i, dev_changed;
281 if (device_get_children(scp->parent, &children, &nchildren) != 0) {
285 spin_lock(&scp->state_lock);
286 old_atadev[0] = scp->atadev[0];
287 old_atadev[1] = scp->atadev[1];
288 scp->atadev[0] = NULL;
289 scp->atadev[1] = NULL;
291 for (i = 0; i < nchildren; i++) {
292 /* XXX Does the child need to actually be attached yet? */
293 if (children[i] != NULL) {
294 atadev = device_get_softc(children[i]);
295 if ((atadev->unit == ATA_MASTER) &&
296 (scp->ata_ch->devices & ATA_ATAPI_MASTER) != 0)
297 scp->atadev[0] = atadev;
298 if ((atadev->unit == ATA_SLAVE) &&
299 (scp->ata_ch->devices & ATA_ATAPI_SLAVE) != 0)
300 scp->atadev[1] = atadev;
303 dev_changed = (old_atadev[0] != scp->atadev[0])
304 || (old_atadev[1] != scp->atadev[1]);
305 spin_unlock(&scp->state_lock);
306 kfree(children, M_TEMP);
310 xpt_async(AC_BUS_RESET, scp->path, NULL);
317 cam_rescan(scp->sim);
323 setup_async_cb(struct atapi_xpt_softc *scp, uint32_t events)
325 struct ccb_setasync csa;
328 xpt_setup_ccb(&csa.ccb_h, scp->path, /*priority*/ 5);
329 csa.ccb_h.func_code = XPT_SASYNC_CB;
330 csa.event_enable = events;
331 csa.callback = &atapi_async;
332 csa.callback_arg = scp->sim;
333 xpt_action((union ccb *) &csa);
338 atapi_action(struct cam_sim *sim, union ccb *ccb)
340 struct atapi_xpt_softc *softc = (struct atapi_xpt_softc*)cam_sim_softc(sim);
341 struct ccb_hdr *ccb_h = &ccb->ccb_h;
342 struct atapi_hcb *hcb = NULL;
343 struct ata_request *request = NULL;
344 int unit = cam_sim_unit(sim);
345 int bus = cam_sim_bus(sim);
349 switch (ccb_h->func_code) {
351 struct ccb_pathinq *cpi = &ccb->cpi;
352 int tid = ccb_h->target_id;
354 cpi->version_num = 1;
355 cpi->hba_inquiry = 0;
356 cpi->target_sprt = 0;
357 cpi->hba_misc = PIM_NO_6_BYTE;
358 cpi->hba_eng_cnt = 0;
359 bzero(cpi->vuhba_flags, sizeof(cpi->vuhba_flags));
362 cpi->async_flags = 0;
364 cpi->initiator_id = 7;
365 strncpy(cpi->sim_vid, "FreeBSD", sizeof(cpi->sim_vid));
366 strncpy(cpi->hba_vid, "ATAPI", sizeof(cpi->hba_vid));
367 strncpy(cpi->dev_name, cam_sim_name(sim), sizeof cpi->dev_name);
368 cpi->unit_number = cam_sim_unit(sim);
369 cpi->bus_id = cam_sim_bus(sim);
370 cpi->base_transfer_speed = 3300;
371 cpi->transport = XPORT_ATA;
372 cpi->transport_version = 2;
373 cpi->protocol = PROTO_SCSI;
374 cpi->protocol_version = SCSI_REV_2;
376 if (softc->ata_ch && tid != CAM_TARGET_WILDCARD) {
377 spin_lock(&softc->state_lock);
378 if (softc->atadev[tid] == NULL) {
379 ccb->ccb_h.status = CAM_DEV_NOT_THERE;
381 spin_unlock(&softc->state_lock);
384 switch (softc->atadev[ccb_h->target_id]->mode) {
386 cpi->base_transfer_speed = 5200;
389 cpi->base_transfer_speed = 7000;
392 cpi->base_transfer_speed = 11000;
397 cpi->base_transfer_speed = 16000;
400 cpi->base_transfer_speed = 33000;
403 cpi->base_transfer_speed = 66000;
406 cpi->base_transfer_speed = 100000;
409 cpi->base_transfer_speed = 133000;
414 spin_unlock(&softc->state_lock);
416 ccb->ccb_h.status = CAM_REQ_CMP;
421 case XPT_RESET_DEV: {
422 int tid = ccb_h->target_id;
424 CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_SUBTRACE, ("dev reset\n"));
425 ata_controlcmd(softc->atadev[tid]->dev, ATA_DEVICE_RESET, 0, 0, 0);
426 ccb->ccb_h.status = CAM_REQ_CMP;
432 CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_SUBTRACE, ("bus reset\n"));
433 ata_reinit(softc->parent);
434 ccb->ccb_h.status = CAM_REQ_CMP;
438 case XPT_SET_TRAN_SETTINGS:
439 /* ignore these, we're not doing SCSI here */
440 CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_SUBTRACE,
441 ("SET_TRAN_SETTINGS not supported\n"));
442 ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
446 case XPT_GET_TRAN_SETTINGS: {
447 struct ccb_trans_settings *cts = &ccb->cts;
448 cts->protocol = PROTO_SCSI;
449 cts->protocol_version = SCSI_REV_2;
450 cts->transport = XPORT_ATA;
451 cts->transport_version = XPORT_VERSION_UNSPECIFIED;
452 cts->proto_specific.valid = 0;
453 cts->xport_specific.valid = 0;
454 /* nothing more to do */
455 ccb->ccb_h.status = CAM_REQ_CMP;
456 CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_SUBTRACE, ("GET_TRAN_SETTINGS\n"));
461 case XPT_CALC_GEOMETRY: {
462 CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_SUBTRACE, ("CALC_GEOMETRY\n"));
463 cam_calc_geometry(&ccb->ccg, /*extended*/1);
469 struct ccb_scsiio *csio = &ccb->csio;
470 int tid = ccb_h->target_id, lid = ccb_h->target_lun;
471 int request_flags = ATA_R_QUIET | ATA_R_ATAPI;
473 CAM_DEBUG(ccb_h->path, CAM_DEBUG_SUBTRACE, ("XPT_SCSI_IO\n"));
475 spin_lock(&softc->state_lock);
476 if (softc->flags & DETACHING) {
477 ccb->ccb_h.status = CAM_REQ_ABORTED;
479 spin_unlock(&softc->state_lock);
483 if (softc->atadev[tid] == NULL) {
484 ccb->ccb_h.status = CAM_DEV_NOT_THERE;
486 spin_unlock(&softc->state_lock);
490 /* check that this request was not aborted already */
491 if ((ccb_h->status & CAM_STATUS_MASK) != CAM_REQ_INPROG) {
492 kprintf("XPT_SCSI_IO received but already in progress?\n");
494 spin_unlock(&softc->state_lock);
498 CAM_DEBUG(ccb_h->path, CAM_DEBUG_SUBTRACE,
499 ("SCSI IO received for invalid lun %d\n", lid));
502 if (csio->cdb_len > sizeof request->u.atapi.ccb) {
503 CAM_DEBUG(ccb_h->path, CAM_DEBUG_SUBTRACE,
504 ("CAM CCB too long for ATAPI"));
507 if ((ccb_h->flags & CAM_SCATTER_VALID)) {
508 /* scatter-gather not supported */
509 xpt_print_path(ccb_h->path);
510 kprintf("ATAPI/CAM does not support scatter-gather yet!\n");
514 switch (ccb_h->flags & CAM_DIR_MASK) {
516 request_flags |= ATA_R_READ;
519 request_flags |= ATA_R_WRITE;
522 /* No flags need to be set */
525 device_printf(softc->dev, "unknown IO operation\n");
529 if ((hcb = allocate_hcb(softc, unit, bus, ccb)) == NULL) {
530 kprintf("cannot allocate ATAPI/CAM hcb\n");
533 if ((request = ata_alloc_request()) == NULL) {
534 kprintf("cannot allocate ATAPI/CAM request\n");
538 bcopy((ccb_h->flags & CAM_CDB_POINTER) ?
539 csio->cdb_io.cdb_ptr : csio->cdb_io.cdb_bytes,
540 request->u.atapi.ccb, csio->cdb_len);
542 if (CAM_DEBUGGED(ccb_h->path, CAM_DEBUG_CDB)) {
543 char cdb_str[(SCSI_MAX_CDBLEN * 3) + 1];
545 kprintf("atapi_action: hcb@%p: %s\n", hcb,
546 scsi_cdb_string(request->u.atapi.ccb, cdb_str, sizeof(cdb_str)));
548 if (CAM_DEBUGGED(ccb_h->path, CAM_DEBUG_SUBTRACE)) {
549 request_flags |= ATA_R_DEBUG;
553 len = csio->dxfer_len;
554 buf = csio->data_ptr;
556 /* some SCSI commands require special processing */
557 switch (request->u.atapi.ccb[0]) {
560 * many ATAPI devices seem to report more than
561 * SHORT_INQUIRY_LENGTH bytes of available INQUIRY
562 * information, but respond with some incorrect condition
563 * when actually asked for it, so we are going to pretend
564 * that only SHORT_INQUIRY_LENGTH are expected, anyway.
566 struct scsi_inquiry *inq = (struct scsi_inquiry *) &request->u.atapi.ccb[0];
568 if (inq->byte2 == 0 && inq->page_code == 0 &&
569 inq->length > SHORT_INQUIRY_LENGTH) {
571 len = inq->length = SHORT_INQUIRY_LENGTH;
579 CAM_DEBUG(ccb_h->path, CAM_DEBUG_SUBTRACE,
580 ("Translating %s into _10 equivalent\n",
581 (request->u.atapi.ccb[0] == READ_6) ? "READ_6" : "WRITE_6"));
582 request->u.atapi.ccb[0] |= 0x20;
583 request->u.atapi.ccb[9] = request->u.atapi.ccb[5];
584 request->u.atapi.ccb[8] = request->u.atapi.ccb[4];
585 request->u.atapi.ccb[7] = 0;
586 request->u.atapi.ccb[6] = 0;
587 request->u.atapi.ccb[5] = request->u.atapi.ccb[3];
588 request->u.atapi.ccb[4] = request->u.atapi.ccb[2];
589 request->u.atapi.ccb[3] = request->u.atapi.ccb[1] & 0x1f;
590 request->u.atapi.ccb[2] = 0;
591 request->u.atapi.ccb[1] = 0;
595 if ((ccb_h->flags & CAM_DIR_MASK) == CAM_DIR_IN && (len & 1)) {
596 /* ATA always transfers an even number of bytes */
597 buf = hcb->dxfer_alloc =
598 kmalloc(++len, M_ATACAM, M_INTWAIT | M_ZERO);
602 * Don't allow DMA for requests with length not multiple of 16 bytes.
603 * Some ATAPI devices don't like it.
605 if ((softc->atadev[tid]->mode >= ATA_DMA) && len > 0 && !(len & 15))
606 request_flags |= ATA_R_DMA;
608 request->dev = softc->atadev[tid]->dev;
609 request->driver = hcb;
611 request->bytecount = len;
612 request->transfersize = min(request->bytecount,
613 min(softc->ata_ch->dma->max_iosize, 65534));
614 request->timeout = ccb_h->timeout / 1000; /* XXX lost granularity */
615 request->callback = &atapi_cb;
616 request->flags = request_flags;
619 * no retries are to be performed at the ATA level; any retries
620 * will be done by CAM .
622 request->retries = 0;
624 TAILQ_INSERT_TAIL(&softc->pending_hcbs, hcb, chain);
625 hcb->flags |= QUEUED;
626 ccb_h->status |= CAM_SIM_QUEUED;
627 spin_unlock(&softc->state_lock);
629 ata_queue_request(request);
634 CAM_DEBUG(ccb_h->path, CAM_DEBUG_SUBTRACE,
635 ("unsupported function code 0x%02x\n", ccb_h->func_code));
643 ata_free_request(request);
646 spin_unlock(&softc->state_lock);
648 xpt_print_path(ccb_h->path);
649 kprintf("out of memory, freezing queue.\n");
650 softc->flags |= RESOURCE_SHORTAGE;
651 xpt_freeze_simq(sim, /*count*/ 1);
653 ccb_h->status = CAM_REQUEUE_REQ;
658 spin_unlock(&softc->state_lock);
659 ccb_h->status = CAM_REQ_INVALID;
665 atapi_poll(struct cam_sim *sim)
667 /* do nothing - we do not actually service any interrupts */
668 kprintf("atapi_poll called!\n");
672 atapi_cb(struct ata_request *request)
674 struct atapi_xpt_softc *scp;
675 struct atapi_hcb *hcb;
676 struct ccb_scsiio *csio;
679 hcb = (struct atapi_hcb *)request->driver;
681 csio = &hcb->ccb->csio;
684 # define err (request->u.atapi.sense.key)
685 if (CAM_DEBUGGED(csio->ccb_h.path, CAM_DEBUG_CDB)) {
686 kprintf("atapi_cb: hcb@%p sense = %02x: sk = %01x%s%s%s\n",
687 hcb, err, err & 0x0f,
688 (err & 0x80) ? ", Filemark" : "",
689 (err & 0x40) ? ", EOM" : "",
690 (err & 0x20) ? ", ILI" : "");
691 device_printf(request->dev,
692 "cmd %s status %02x result %02x error %02x\n",
693 ata_cmd2str(request),
694 request->status, request->result, request->error);
698 if ((hcb->flags & AUTOSENSE) != 0) {
699 rc = CAM_SCSI_STATUS_ERROR;
700 if (request->result == 0) {
701 csio->ccb_h.status |= CAM_AUTOSNS_VALID;
703 } else if (request->result != 0) {
704 if ((request->flags & ATA_R_TIMEOUT) != 0) {
705 rc = CAM_CMD_TIMEOUT;
707 rc = CAM_SCSI_STATUS_ERROR;
708 csio->scsi_status = SCSI_STATUS_CHECK_COND;
710 if ((csio->ccb_h.flags & CAM_DIS_AUTOSENSE) == 0) {
712 static const int8_t ccb[16] = { ATAPI_REQUEST_SENSE, 0, 0, 0,
713 sizeof(struct atapi_sense), 0, 0, 0, 0, 0, 0,
716 bcopy (ccb, request->u.atapi.ccb, sizeof ccb);
717 request->data = (caddr_t)&csio->sense_data;
718 request->bytecount = sizeof(struct atapi_sense);
719 request->transfersize = min(request->bytecount, 65534);
720 request->timeout = csio->ccb_h.timeout / 1000;
721 request->retries = 2;
722 request->flags = ATA_R_QUIET|ATA_R_ATAPI|ATA_R_IMMEDIATE;
723 hcb->flags |= AUTOSENSE;
725 ata_queue_request(request);
729 * Use auto-sense data from the ATA layer, if it has
730 * issued a REQUEST SENSE automatically and that operation
731 * returned without error.
733 if (request->u.atapi.sense.key != 0 && request->error == 0) {
734 bcopy (&request->u.atapi.sense, &csio->sense_data, sizeof(struct atapi_sense));
735 csio->ccb_h.status |= CAM_AUTOSNS_VALID;
742 csio->scsi_status = SCSI_STATUS_OK;
743 if (((csio->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN) &&
744 hcb->dxfer_alloc != NULL)
746 bcopy(hcb->dxfer_alloc, csio->data_ptr, csio->dxfer_len);
750 spin_lock(&scp->state_lock);
751 free_hcb_and_ccb_done(hcb, rc);
752 spin_unlock(&scp->state_lock);
754 ata_free_request(request);
758 free_hcb_and_ccb_done(struct atapi_hcb *hcb, u_int32_t status)
760 struct atapi_xpt_softc *softc;
769 /* we're about to free a hcb, so the shortage has ended */
770 if (softc->flags & RESOURCE_SHORTAGE) {
771 softc->flags &= ~RESOURCE_SHORTAGE;
772 status |= CAM_RELEASE_SIMQ;
776 status | (ccb->ccb_h.status & ~(CAM_STATUS_MASK | CAM_SIM_QUEUED));
781 atapi_async(void *callback_arg, u_int32_t code,
782 struct cam_path* path, void *arg)
790 targ = xpt_path_target_id(path);
791 xpt_print_path(path);
793 kprintf("Lost host adapter\n");
795 kprintf("Lost target %d???\n", targ);
806 cam_rescan_callback(struct cam_periph *periph, union ccb *ccb)
808 if (ccb->ccb_h.status != CAM_REQ_CMP) {
809 CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE,
810 ("Rescan failed, 0x%04x\n", ccb->ccb_h.status));
812 CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE,
813 ("Rescan succeeded\n"));
815 xpt_free_path(ccb->ccb_h.path);
816 kfree(ccb, M_ATACAM);
820 cam_rescan(struct cam_sim *sim)
822 struct cam_path *path;
823 union ccb *ccb = kmalloc(sizeof(union ccb), M_ATACAM, M_WAITOK | M_ZERO);
826 if (xpt_create_path(&path, xpt_periph, cam_sim_path(sim),
827 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD) != CAM_REQ_CMP) {
829 kfree(ccb, M_ATACAM);
833 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("Rescanning ATAPI bus.\n"));
834 xpt_setup_ccb(&ccb->ccb_h, path, 5/*priority (low)*/);
835 ccb->ccb_h.func_code = XPT_SCAN_BUS;
836 ccb->ccb_h.cbfcnp = cam_rescan_callback;
837 ccb->crcn.flags = CAM_FLAG_NONE;
839 /* scan is in progress now */
843 static struct atapi_hcb *
844 allocate_hcb(struct atapi_xpt_softc *softc, int unit, int bus, union ccb *ccb)
846 struct atapi_hcb *hcb = (struct atapi_hcb *)
847 kmalloc(sizeof(struct atapi_hcb), M_ATACAM, M_INTWAIT | M_ZERO);
857 free_hcb(struct atapi_hcb *hcb)
859 if ((hcb->flags & QUEUED) != 0)
860 TAILQ_REMOVE(&hcb->softc->pending_hcbs, hcb, chain);
861 if (hcb->dxfer_alloc != NULL)
862 kfree(hcb->dxfer_alloc, M_ATACAM);
863 kfree(hcb, M_ATACAM);
867 free_softc(struct atapi_xpt_softc *scp)
869 struct atapi_hcb *hcb;
872 spin_lock(&scp->state_lock);
873 TAILQ_FOREACH(hcb, &scp->pending_hcbs, chain) {
874 free_hcb_and_ccb_done(hcb, CAM_UNREC_HBA_ERROR);
876 spin_unlock(&scp->state_lock);
878 if (scp->path != NULL) {
879 setup_async_cb(scp, 0);
880 xpt_free_path(scp->path);
882 if ((scp->flags & BUS_REGISTERED) != 0) {
883 if (xpt_bus_deregister(cam_sim_path(scp->sim)) == CAM_REQ_CMP)
884 scp->flags &= ~BUS_REGISTERED;
886 if (scp->sim != NULL) {
887 if ((scp->flags & BUS_REGISTERED) == 0)
888 cam_sim_free(scp->sim);
890 kprintf("Can't free %s SIM (still registered)\n",
891 cam_sim_name(scp->sim));
894 spin_uninit(&scp->state_lock);
899 atapi_cam_event_handler(module_t mod, int what, void *arg) {
905 if (devclass_get_devices(atapi_cam_devclass, &devlist, &devcount)
908 if (devlist != NULL) {
909 while (devlist != NULL && devcount > 0) {
910 device_t child = devlist[--devcount];
911 struct atapi_xpt_softc *scp = device_get_softc(child);
913 device_delete_child(device_get_parent(child),child);
915 kfree(scp, M_ATACAM);
917 kfree(devlist, M_TEMP);