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scsi_pt.c (58934) scsi_pt.c (59249)
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

--- 11 unchanged lines hidden (view full) ---

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 *
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

--- 11 unchanged lines hidden (view full) ---

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: head/sys/cam/scsi/scsi_pt.c 58934 2000-04-02 15:24:56Z phk $
28 * $FreeBSD: head/sys/cam/scsi/scsi_pt.c 59249 2000-04-15 05:54:02Z phk $
29 */
30
31#include <sys/param.h>
32#include <sys/queue.h>
33#include <sys/systm.h>
34#include <sys/kernel.h>
35#include <sys/types.h>
36#include <sys/buf.h>

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71 PT_CCB_BUFFER_IO_UA = PT_CCB_BUFFER_IO|PT_CCB_RETRY_UA
72} pt_ccb_state;
73
74/* Offsets into our private area for storing information */
75#define ccb_state ppriv_field0
76#define ccb_bp ppriv_ptr1
77
78struct pt_softc {
29 */
30
31#include <sys/param.h>
32#include <sys/queue.h>
33#include <sys/systm.h>
34#include <sys/kernel.h>
35#include <sys/types.h>
36#include <sys/buf.h>

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71 PT_CCB_BUFFER_IO_UA = PT_CCB_BUFFER_IO|PT_CCB_RETRY_UA
72} pt_ccb_state;
73
74/* Offsets into our private area for storing information */
75#define ccb_state ppriv_field0
76#define ccb_bp ppriv_ptr1
77
78struct pt_softc {
79 struct buf_queue_head buf_queue;
79 struct bio_queue_head bio_queue;
80 struct devstat device_stats;
81 LIST_HEAD(, ccb_hdr) pending_ccbs;
82 pt_state state;
83 pt_flags flags;
84 union ccb saved_ccb;
85 int io_timeout;
86 dev_t dev;
87};

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210}
211
212/*
213 * Actually translate the requested transfer into one the physical driver
214 * can understand. The transfer is described by a buf and will include
215 * only one physical transfer.
216 */
217static void
80 struct devstat device_stats;
81 LIST_HEAD(, ccb_hdr) pending_ccbs;
82 pt_state state;
83 pt_flags flags;
84 union ccb saved_ccb;
85 int io_timeout;
86 dev_t dev;
87};

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210}
211
212/*
213 * Actually translate the requested transfer into one the physical driver
214 * can understand. The transfer is described by a buf and will include
215 * only one physical transfer.
216 */
217static void
218ptstrategy(struct buf *bp)
218ptstrategy(struct bio *bp)
219{
220 struct cam_periph *periph;
221 struct pt_softc *softc;
222 u_int unit;
223 int s;
224
219{
220 struct cam_periph *periph;
221 struct pt_softc *softc;
222 u_int unit;
223 int s;
224
225 unit = minor(bp->b_dev);
225 unit = minor(bp->bio_dev);
226 periph = cam_extend_get(ptperiphs, unit);
227 if (periph == NULL) {
226 periph = cam_extend_get(ptperiphs, unit);
227 if (periph == NULL) {
228 bp->b_error = ENXIO;
228 bp->bio_error = ENXIO;
229 goto bad;
230 }
231 softc = (struct pt_softc *)periph->softc;
232
233 /*
234 * Mask interrupts so that the pack cannot be invalidated until
235 * after we are in the queue. Otherwise, we might not properly
236 * clean up one of the buffers.
237 */
238 s = splbio();
239
240 /*
241 * If the device has been made invalid, error out
242 */
243 if ((softc->flags & PT_FLAG_DEVICE_INVALID)) {
244 splx(s);
229 goto bad;
230 }
231 softc = (struct pt_softc *)periph->softc;
232
233 /*
234 * Mask interrupts so that the pack cannot be invalidated until
235 * after we are in the queue. Otherwise, we might not properly
236 * clean up one of the buffers.
237 */
238 s = splbio();
239
240 /*
241 * If the device has been made invalid, error out
242 */
243 if ((softc->flags & PT_FLAG_DEVICE_INVALID)) {
244 splx(s);
245 bp->b_error = ENXIO;
245 bp->bio_error = ENXIO;
246 goto bad;
247 }
248
249 /*
250 * Place it in the queue of disk activities for this disk
251 */
246 goto bad;
247 }
248
249 /*
250 * Place it in the queue of disk activities for this disk
251 */
252 bufq_insert_tail(&softc->buf_queue, bp);
252 bioq_insert_tail(&softc->bio_queue, bp);
253
254 splx(s);
255
256 /*
257 * Schedule ourselves for performing the work.
258 */
259 xpt_schedule(periph, /* XXX priority */1);
260
261 return;
262bad:
253
254 splx(s);
255
256 /*
257 * Schedule ourselves for performing the work.
258 */
259 xpt_schedule(periph, /* XXX priority */1);
260
261 return;
262bad:
263 bp->b_ioflags |= BIO_ERROR;
263 bp->bio_flags |= BIO_ERROR;
264
265 /*
266 * Correctly set the buf to indicate a completed xfer
267 */
264
265 /*
266 * Correctly set the buf to indicate a completed xfer
267 */
268 bp->b_resid = bp->b_bcount;
268 bp->bio_resid = bp->bio_bcount;
269 biodone(bp);
270}
271
272static void
273ptinit(void)
274{
275 cam_status status;
276 struct cam_path *path;

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334 printf("daregister: Unable to probe new device. "
335 "Unable to allocate softc\n");
336 return(CAM_REQ_CMP_ERR);
337 }
338
339 bzero(softc, sizeof(*softc));
340 LIST_INIT(&softc->pending_ccbs);
341 softc->state = PT_STATE_NORMAL;
269 biodone(bp);
270}
271
272static void
273ptinit(void)
274{
275 cam_status status;
276 struct cam_path *path;

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334 printf("daregister: Unable to probe new device. "
335 "Unable to allocate softc\n");
336 return(CAM_REQ_CMP_ERR);
337 }
338
339 bzero(softc, sizeof(*softc));
340 LIST_INIT(&softc->pending_ccbs);
341 softc->state = PT_STATE_NORMAL;
342 bufq_init(&softc->buf_queue);
342 bioq_init(&softc->bio_queue);
343
344 softc->io_timeout = SCSI_PT_DEFAULT_TIMEOUT * 1000;
345
346 periph->softc = softc;
347
348 cam_extend_set(ptperiphs, periph->unit_number, periph);
349
350 devstat_add_entry(&softc->device_stats, "pt",

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377 return(CAM_REQ_CMP);
378}
379
380static void
381ptoninvalidate(struct cam_periph *periph)
382{
383 int s;
384 struct pt_softc *softc;
343
344 softc->io_timeout = SCSI_PT_DEFAULT_TIMEOUT * 1000;
345
346 periph->softc = softc;
347
348 cam_extend_set(ptperiphs, periph->unit_number, periph);
349
350 devstat_add_entry(&softc->device_stats, "pt",

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377 return(CAM_REQ_CMP);
378}
379
380static void
381ptoninvalidate(struct cam_periph *periph)
382{
383 int s;
384 struct pt_softc *softc;
385 struct buf *q_bp;
385 struct bio *q_bp;
386 struct ccb_setasync csa;
387
388 softc = (struct pt_softc *)periph->softc;
389
390 /*
391 * De-register any async callbacks.
392 */
393 xpt_setup_ccb(&csa.ccb_h, periph->path,

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407 */
408 s = splbio();
409
410 /*
411 * Return all queued I/O with ENXIO.
412 * XXX Handle any transactions queued to the card
413 * with XPT_ABORT_CCB.
414 */
386 struct ccb_setasync csa;
387
388 softc = (struct pt_softc *)periph->softc;
389
390 /*
391 * De-register any async callbacks.
392 */
393 xpt_setup_ccb(&csa.ccb_h, periph->path,

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407 */
408 s = splbio();
409
410 /*
411 * Return all queued I/O with ENXIO.
412 * XXX Handle any transactions queued to the card
413 * with XPT_ABORT_CCB.
414 */
415 while ((q_bp = bufq_first(&softc->buf_queue)) != NULL){
416 bufq_remove(&softc->buf_queue, q_bp);
417 q_bp->b_resid = q_bp->b_bcount;
418 q_bp->b_error = ENXIO;
419 q_bp->b_ioflags |= BIO_ERROR;
415 while ((q_bp = bioq_first(&softc->bio_queue)) != NULL){
416 bioq_remove(&softc->bio_queue, q_bp);
417 q_bp->bio_resid = q_bp->bio_bcount;
418 q_bp->bio_error = ENXIO;
419 q_bp->bio_flags |= BIO_ERROR;
420 biodone(q_bp);
421 }
422
423 splx(s);
424
425 xpt_print_path(periph->path);
426 printf("lost device\n");
427}

--- 73 unchanged lines hidden (view full) ---

501 break;
502 }
503}
504
505static void
506ptstart(struct cam_periph *periph, union ccb *start_ccb)
507{
508 struct pt_softc *softc;
420 biodone(q_bp);
421 }
422
423 splx(s);
424
425 xpt_print_path(periph->path);
426 printf("lost device\n");
427}

--- 73 unchanged lines hidden (view full) ---

501 break;
502 }
503}
504
505static void
506ptstart(struct cam_periph *periph, union ccb *start_ccb)
507{
508 struct pt_softc *softc;
509 struct buf *bp;
509 struct bio *bp;
510 int s;
511
512 softc = (struct pt_softc *)periph->softc;
513
514 /*
515 * See if there is a buf with work for us to do..
516 */
517 s = splbio();
510 int s;
511
512 softc = (struct pt_softc *)periph->softc;
513
514 /*
515 * See if there is a buf with work for us to do..
516 */
517 s = splbio();
518 bp = bufq_first(&softc->buf_queue);
518 bp = bioq_first(&softc->bio_queue);
519 if (periph->immediate_priority <= periph->pinfo.priority) {
520 CAM_DEBUG_PRINT(CAM_DEBUG_SUBTRACE,
521 ("queuing for immediate ccb\n"));
522 start_ccb->ccb_h.ccb_state = PT_CCB_WAITING;
523 SLIST_INSERT_HEAD(&periph->ccb_list, &start_ccb->ccb_h,
524 periph_links.sle);
525 periph->immediate_priority = CAM_PRIORITY_NONE;
526 splx(s);
527 wakeup(&periph->ccb_list);
528 } else if (bp == NULL) {
529 splx(s);
530 xpt_release_ccb(start_ccb);
531 } else {
532 int oldspl;
533
519 if (periph->immediate_priority <= periph->pinfo.priority) {
520 CAM_DEBUG_PRINT(CAM_DEBUG_SUBTRACE,
521 ("queuing for immediate ccb\n"));
522 start_ccb->ccb_h.ccb_state = PT_CCB_WAITING;
523 SLIST_INSERT_HEAD(&periph->ccb_list, &start_ccb->ccb_h,
524 periph_links.sle);
525 periph->immediate_priority = CAM_PRIORITY_NONE;
526 splx(s);
527 wakeup(&periph->ccb_list);
528 } else if (bp == NULL) {
529 splx(s);
530 xpt_release_ccb(start_ccb);
531 } else {
532 int oldspl;
533
534 bufq_remove(&softc->buf_queue, bp);
534 bioq_remove(&softc->bio_queue, bp);
535
536 devstat_start_transaction(&softc->device_stats);
537
538 scsi_send_receive(&start_ccb->csio,
539 /*retries*/4,
540 ptdone,
541 MSG_SIMPLE_Q_TAG,
535
536 devstat_start_transaction(&softc->device_stats);
537
538 scsi_send_receive(&start_ccb->csio,
539 /*retries*/4,
540 ptdone,
541 MSG_SIMPLE_Q_TAG,
542 bp->b_iocmd == BIO_READ,
542 bp->bio_cmd == BIO_READ,
543 /*byte2*/0,
543 /*byte2*/0,
544 bp->b_bcount,
545 bp->b_data,
544 bp->bio_bcount,
545 bp->bio_data,
546 /*sense_len*/SSD_FULL_SIZE,
547 /*timeout*/softc->io_timeout);
548
549 start_ccb->ccb_h.ccb_state = PT_CCB_BUFFER_IO;
550
551 /*
552 * Block out any asyncronous callbacks
553 * while we touch the pending ccb list.
554 */
555 oldspl = splcam();
556 LIST_INSERT_HEAD(&softc->pending_ccbs, &start_ccb->ccb_h,
557 periph_links.le);
558 splx(oldspl);
559
560 start_ccb->ccb_h.ccb_bp = bp;
546 /*sense_len*/SSD_FULL_SIZE,
547 /*timeout*/softc->io_timeout);
548
549 start_ccb->ccb_h.ccb_state = PT_CCB_BUFFER_IO;
550
551 /*
552 * Block out any asyncronous callbacks
553 * while we touch the pending ccb list.
554 */
555 oldspl = splcam();
556 LIST_INSERT_HEAD(&softc->pending_ccbs, &start_ccb->ccb_h,
557 periph_links.le);
558 splx(oldspl);
559
560 start_ccb->ccb_h.ccb_bp = bp;
561 bp = bufq_first(&softc->buf_queue);
561 bp = bioq_first(&softc->bio_queue);
562 splx(s);
563
564 xpt_action(start_ccb);
565
566 if (bp != NULL) {
567 /* Have more work to do, so ensure we stay scheduled */
568 xpt_schedule(periph, /* XXX priority */1);
569 }

--- 7 unchanged lines hidden (view full) ---

577 struct ccb_scsiio *csio;
578
579 softc = (struct pt_softc *)periph->softc;
580 csio = &done_ccb->csio;
581 switch (csio->ccb_h.ccb_state) {
582 case PT_CCB_BUFFER_IO:
583 case PT_CCB_BUFFER_IO_UA:
584 {
562 splx(s);
563
564 xpt_action(start_ccb);
565
566 if (bp != NULL) {
567 /* Have more work to do, so ensure we stay scheduled */
568 xpt_schedule(periph, /* XXX priority */1);
569 }

--- 7 unchanged lines hidden (view full) ---

577 struct ccb_scsiio *csio;
578
579 softc = (struct pt_softc *)periph->softc;
580 csio = &done_ccb->csio;
581 switch (csio->ccb_h.ccb_state) {
582 case PT_CCB_BUFFER_IO:
583 case PT_CCB_BUFFER_IO_UA:
584 {
585 struct buf *bp;
585 struct bio *bp;
586 int oldspl;
587
586 int oldspl;
587
588 bp = (struct buf *)done_ccb->ccb_h.ccb_bp;
588 bp = (struct bio *)done_ccb->ccb_h.ccb_bp;
589 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
590 int error;
591 int s;
592 int sf;
593
594 if ((csio->ccb_h.ccb_state & PT_CCB_RETRY_UA) != 0)
595 sf = SF_RETRY_UA;
596 else

--- 4 unchanged lines hidden (view full) ---

601 if ((error = pterror(done_ccb, 0, sf)) == ERESTART) {
602 /*
603 * A retry was scheuled, so
604 * just return.
605 */
606 return;
607 }
608 if (error != 0) {
589 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
590 int error;
591 int s;
592 int sf;
593
594 if ((csio->ccb_h.ccb_state & PT_CCB_RETRY_UA) != 0)
595 sf = SF_RETRY_UA;
596 else

--- 4 unchanged lines hidden (view full) ---

601 if ((error = pterror(done_ccb, 0, sf)) == ERESTART) {
602 /*
603 * A retry was scheuled, so
604 * just return.
605 */
606 return;
607 }
608 if (error != 0) {
609 struct buf *q_bp;
609 struct bio *q_bp;
610
611 s = splbio();
612
613 if (error == ENXIO) {
614 /*
615 * Catastrophic error. Mark our device
616 * as invalid.
617 */
618 xpt_print_path(periph->path);
619 printf("Invalidating device\n");
620 softc->flags |= PT_FLAG_DEVICE_INVALID;
621 }
622
623 /*
624 * return all queued I/O with EIO, so that
625 * the client can retry these I/Os in the
626 * proper order should it attempt to recover.
627 */
610
611 s = splbio();
612
613 if (error == ENXIO) {
614 /*
615 * Catastrophic error. Mark our device
616 * as invalid.
617 */
618 xpt_print_path(periph->path);
619 printf("Invalidating device\n");
620 softc->flags |= PT_FLAG_DEVICE_INVALID;
621 }
622
623 /*
624 * return all queued I/O with EIO, so that
625 * the client can retry these I/Os in the
626 * proper order should it attempt to recover.
627 */
628 while ((q_bp = bufq_first(&softc->buf_queue))
628 while ((q_bp = bioq_first(&softc->bio_queue))
629 != NULL) {
629 != NULL) {
630 bufq_remove(&softc->buf_queue, q_bp);
631 q_bp->b_resid = q_bp->b_bcount;
632 q_bp->b_error = EIO;
633 q_bp->b_ioflags |= BIO_ERROR;
630 bioq_remove(&softc->bio_queue, q_bp);
631 q_bp->bio_resid = q_bp->bio_bcount;
632 q_bp->bio_error = EIO;
633 q_bp->bio_flags |= BIO_ERROR;
634 biodone(q_bp);
635 }
636 splx(s);
634 biodone(q_bp);
635 }
636 splx(s);
637 bp->b_error = error;
638 bp->b_resid = bp->b_bcount;
639 bp->b_ioflags |= BIO_ERROR;
637 bp->bio_error = error;
638 bp->bio_resid = bp->bio_bcount;
639 bp->bio_flags |= BIO_ERROR;
640 } else {
640 } else {
641 bp->b_resid = csio->resid;
642 bp->b_error = 0;
643 if (bp->b_resid != 0) {
641 bp->bio_resid = csio->resid;
642 bp->bio_error = 0;
643 if (bp->bio_resid != 0) {
644 /* Short transfer ??? */
644 /* Short transfer ??? */
645 bp->b_ioflags |= BIO_ERROR;
645 bp->bio_flags |= BIO_ERROR;
646 }
647 }
648 if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
649 cam_release_devq(done_ccb->ccb_h.path,
650 /*relsim_flags*/0,
651 /*reduction*/0,
652 /*timeout*/0,
653 /*getcount_only*/0);
654 } else {
646 }
647 }
648 if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
649 cam_release_devq(done_ccb->ccb_h.path,
650 /*relsim_flags*/0,
651 /*reduction*/0,
652 /*timeout*/0,
653 /*getcount_only*/0);
654 } else {
655 bp->b_resid = csio->resid;
656 if (bp->b_resid != 0)
657 bp->b_ioflags |= BIO_ERROR;
655 bp->bio_resid = csio->resid;
656 if (bp->bio_resid != 0)
657 bp->bio_flags |= BIO_ERROR;
658 }
659
660 /*
661 * Block out any asyncronous callbacks
662 * while we touch the pending ccb list.
663 */
664 oldspl = splcam();
665 LIST_REMOVE(&done_ccb->ccb_h, periph_links.le);
666 splx(oldspl);
667
658 }
659
660 /*
661 * Block out any asyncronous callbacks
662 * while we touch the pending ccb list.
663 */
664 oldspl = splcam();
665 LIST_REMOVE(&done_ccb->ccb_h, periph_links.le);
666 splx(oldspl);
667
668 devstat_end_transaction_buf(&softc->device_stats, bp);
668 devstat_end_transaction_bio(&softc->device_stats, bp);
669 biodone(bp);
670 break;
671 }
672 case PT_CCB_WAITING:
673 /* Caller will release the CCB */
674 wakeup(&done_ccb->ccb_h.cbfcnp);
675 return;
676 }

--- 94 unchanged lines hidden --- 		669 biodone(bp);
670 break;
671 }
672 case PT_CCB_WAITING:
673 /* Caller will release the CCB */
674 wakeup(&done_ccb->ccb_h.cbfcnp);
675 return;
676 }

--- 94 unchanged lines hidden ---