Refactor the various delete methods out of dastart(). Cleans up a bunch
of style and adds more modularity and clarity. Obtained from: Netflix MFC after: 3 days
This commit is contained in:
parent
e08aa295d0
commit
b27b6b66c0
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=253228
@ -144,6 +144,22 @@ typedef enum {
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DA_DELETE_MAX = DA_DELETE_ZERO
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} da_delete_methods;
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typedef void da_delete_func_t (struct cam_periph *periph, union ccb *ccb,
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struct bio *bp);
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static da_delete_func_t da_delete_trim;
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static da_delete_func_t da_delete_unmap;
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static da_delete_func_t da_delete_ws;
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static void * da_delete_functions[] = {
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NULL,
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NULL,
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da_delete_trim,
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da_delete_unmap,
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da_delete_ws,
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da_delete_ws,
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da_delete_ws
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};
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static const char *da_delete_method_names[] =
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{ "NONE", "DISABLE", "ATA_TRIM", "UNMAP", "WS16", "WS10", "ZERO" };
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static const char *da_delete_method_desc[] =
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@ -198,6 +214,7 @@ struct da_softc {
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uint32_t unmap_max_lba;
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uint64_t ws_max_blks;
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da_delete_methods delete_method;
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da_delete_func_t *delete_func;
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struct disk_params params;
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struct disk *disk;
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union ccb saved_ccb;
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@ -1801,6 +1818,10 @@ dadeletemethodset(struct da_softc *softc, da_delete_methods delete_method)
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softc->delete_method = delete_method;
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softc->disk->d_delmaxsize = dadeletemaxsize(softc, delete_method);
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if (delete_method <= DA_DELETE_MAX)
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softc->delete_func = da_delete_functions[delete_method];
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else
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softc->delete_func = NULL;
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if (softc->delete_method > DA_DELETE_DISABLE)
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softc->disk->d_flags |= DISKFLAG_CANDELETE;
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@ -2160,7 +2181,7 @@ dastart(struct cam_periph *periph, union ccb *start_ccb)
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switch (softc->state) {
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case DA_STATE_NORMAL:
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{
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struct bio *bp, *bp1;
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struct bio *bp;
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uint8_t tag_code;
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/* Execute immediate CCB if waiting. */
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@ -2180,232 +2201,8 @@ dastart(struct cam_periph *periph, union ccb *start_ccb)
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/* Run BIO_DELETE if not running yet. */
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if (!softc->delete_running &&
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(bp = bioq_first(&softc->delete_queue)) != NULL) {
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uint64_t lba;
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uint64_t count; /* forward compat with WS32 */
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/*
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* In each of the methods below, while its the caller's
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* responsibility to ensure the request will fit into a
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* single device request, we might have changed the delete
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* method due to the device incorrectly advertising either
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* its supported methods or limits.
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*
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* To prevent this causing further issues we validate the
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* against the methods limits, and warn which would
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* otherwise be unnecessary.
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*/
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if (softc->delete_method == DA_DELETE_UNMAP) {
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uint8_t *buf = softc->unmap_buf;
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uint64_t lastlba = (uint64_t)-1;
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uint32_t lastcount = 0, c;
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uint64_t totalcount = 0;
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uint32_t off, ranges = 0;
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/*
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* Currently this doesn't take the UNMAP
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* Granularity and Granularity Alignment
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* fields into account.
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*
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* This could result in both unoptimal unmap
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* requests as as well as UNMAP calls unmapping
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* fewer LBA's than requested.
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*/
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softc->delete_running = 1;
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bzero(softc->unmap_buf, sizeof(softc->unmap_buf));
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bp1 = bp;
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do {
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bioq_remove(&softc->delete_queue, bp1);
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if (bp1 != bp)
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bioq_insert_tail(&softc->delete_run_queue, bp1);
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lba = bp1->bio_pblkno;
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count = bp1->bio_bcount / softc->params.secsize;
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/* Try to extend the previous range. */
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if (lba == lastlba) {
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c = min(count, softc->unmap_max_lba -
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lastcount);
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lastcount += c;
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off = ((ranges - 1) * UNMAP_RANGE_SIZE) +
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UNMAP_HEAD_SIZE;
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scsi_ulto4b(lastcount, &buf[off + 8]);
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count -= c;
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lba +=c;
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totalcount += c;
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}
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while (count > 0) {
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c = min(count, softc->unmap_max_lba);
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if (totalcount + c > softc->unmap_max_lba ||
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ranges >= softc->unmap_max_ranges) {
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xpt_print(periph->path,
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"%s issuing short delete %ld > %ld"
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"|| %d >= %d",
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da_delete_method_desc[softc->delete_method],
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totalcount + c, softc->unmap_max_lba,
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ranges, softc->unmap_max_ranges);
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break;
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}
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off = (ranges * UNMAP_RANGE_SIZE) +
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UNMAP_HEAD_SIZE;
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scsi_u64to8b(lba, &buf[off + 0]);
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scsi_ulto4b(c, &buf[off + 8]);
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lba += c;
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totalcount += c;
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ranges++;
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count -= c;
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lastcount = c;
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}
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lastlba = lba;
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bp1 = bioq_first(&softc->delete_queue);
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if (bp1 == NULL ||
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ranges >= softc->unmap_max_ranges ||
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totalcount + bp1->bio_bcount /
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softc->params.secsize > softc->unmap_max_lba)
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break;
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} while (1);
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scsi_ulto2b(ranges * 16 + 6, &buf[0]);
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scsi_ulto2b(ranges * 16, &buf[2]);
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scsi_unmap(&start_ccb->csio,
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/*retries*/da_retry_count,
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/*cbfcnp*/dadone,
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/*tag_action*/MSG_SIMPLE_Q_TAG,
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/*byte2*/0,
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/*data_ptr*/ buf,
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/*dxfer_len*/ ranges * 16 + 8,
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/*sense_len*/SSD_FULL_SIZE,
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da_default_timeout * 1000);
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start_ccb->ccb_h.ccb_state = DA_CCB_DELETE;
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goto out;
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} else if (softc->delete_method == DA_DELETE_ATA_TRIM) {
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uint8_t *buf = softc->unmap_buf;
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uint64_t lastlba = (uint64_t)-1;
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uint32_t lastcount = 0, c, requestcount;
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int ranges = 0, off, block_count;
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softc->delete_running = 1;
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bzero(softc->unmap_buf, sizeof(softc->unmap_buf));
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bp1 = bp;
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do {
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bioq_remove(&softc->delete_queue, bp1);
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if (bp1 != bp)
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bioq_insert_tail(&softc->delete_run_queue, bp1);
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lba = bp1->bio_pblkno;
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count = bp1->bio_bcount / softc->params.secsize;
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requestcount = count;
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/* Try to extend the previous range. */
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if (lba == lastlba) {
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c = min(count, ATA_DSM_RANGE_MAX - lastcount);
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lastcount += c;
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off = (ranges - 1) * 8;
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buf[off + 6] = lastcount & 0xff;
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buf[off + 7] = (lastcount >> 8) & 0xff;
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count -= c;
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lba += c;
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}
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while (count > 0) {
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c = min(count, ATA_DSM_RANGE_MAX);
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off = ranges * 8;
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buf[off + 0] = lba & 0xff;
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buf[off + 1] = (lba >> 8) & 0xff;
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buf[off + 2] = (lba >> 16) & 0xff;
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buf[off + 3] = (lba >> 24) & 0xff;
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buf[off + 4] = (lba >> 32) & 0xff;
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buf[off + 5] = (lba >> 40) & 0xff;
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buf[off + 6] = c & 0xff;
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buf[off + 7] = (c >> 8) & 0xff;
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lba += c;
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ranges++;
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count -= c;
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lastcount = c;
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if (count != 0 && ranges == softc->trim_max_ranges) {
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xpt_print(periph->path,
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"%s issuing short delete %ld > %ld",
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da_delete_method_desc[softc->delete_method],
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requestcount,
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(softc->trim_max_ranges - ranges) *
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ATA_DSM_RANGE_MAX);
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break;
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}
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}
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lastlba = lba;
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bp1 = bioq_first(&softc->delete_queue);
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if (bp1 == NULL ||
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bp1->bio_bcount / softc->params.secsize >
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(softc->trim_max_ranges - ranges) *
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ATA_DSM_RANGE_MAX)
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break;
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} while (1);
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block_count = (ranges + ATA_DSM_BLK_RANGES - 1) /
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ATA_DSM_BLK_RANGES;
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scsi_ata_trim(&start_ccb->csio,
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/*retries*/da_retry_count,
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/*cbfcnp*/dadone,
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/*tag_action*/MSG_SIMPLE_Q_TAG,
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block_count,
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/*data_ptr*/buf,
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/*dxfer_len*/block_count * ATA_DSM_BLK_SIZE,
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/*sense_len*/SSD_FULL_SIZE,
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da_default_timeout * 1000);
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start_ccb->ccb_h.ccb_state = DA_CCB_DELETE;
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goto out;
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} else if (softc->delete_method == DA_DELETE_ZERO ||
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softc->delete_method == DA_DELETE_WS10 ||
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softc->delete_method == DA_DELETE_WS16) {
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/*
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* We calculate ws_max_blks here based off d_delmaxsize instead
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* of using softc->ws_max_blks as it is absolute max for the
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* device not the protocol max which may well be lower
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*/
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uint64_t ws_max_blks;
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ws_max_blks = softc->disk->d_delmaxsize / softc->params.secsize;
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softc->delete_running = 1;
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lba = bp->bio_pblkno;
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count = 0;
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bp1 = bp;
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do {
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bioq_remove(&softc->delete_queue, bp1);
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if (bp1 != bp)
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bioq_insert_tail(&softc->delete_run_queue, bp1);
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count += bp1->bio_bcount / softc->params.secsize;
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if (count > ws_max_blks) {
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count = min(count, ws_max_blks);
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xpt_print(periph->path,
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"%s issuing short delete %ld > %ld",
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da_delete_method_desc[softc->delete_method],
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count, ws_max_blks);
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break;
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}
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bp1 = bioq_first(&softc->delete_queue);
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if (bp1 == NULL ||
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lba + count != bp1->bio_pblkno ||
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count + bp1->bio_bcount /
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softc->params.secsize > ws_max_blks)
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break;
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} while (1);
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scsi_write_same(&start_ccb->csio,
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/*retries*/da_retry_count,
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/*cbfcnp*/dadone,
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/*tag_action*/MSG_SIMPLE_Q_TAG,
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/*byte2*/softc->delete_method ==
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DA_DELETE_ZERO ? 0 : SWS_UNMAP,
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softc->delete_method ==
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DA_DELETE_WS16 ? 16 : 10,
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/*lba*/lba,
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/*block_count*/count,
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/*data_ptr*/ __DECONST(void *,
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zero_region),
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/*dxfer_len*/ softc->params.secsize,
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/*sense_len*/SSD_FULL_SIZE,
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da_default_timeout * 1000);
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start_ccb->ccb_h.ccb_state = DA_CCB_DELETE;
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if (softc->delete_func != NULL) {
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softc->delete_func(periph, start_ccb, bp);
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goto out;
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} else {
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bioq_flush(&softc->delete_queue, NULL, 0);
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@ -2703,6 +2500,240 @@ dastart(struct cam_periph *periph, union ccb *start_ccb)
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}
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}
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/*
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* In each of the methods below, while its the caller's
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* responsibility to ensure the request will fit into a
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* single device request, we might have changed the delete
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* method due to the device incorrectly advertising either
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* its supported methods or limits.
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*
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* To prevent this causing further issues we validate the
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* against the methods limits, and warn which would
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* otherwise be unnecessary.
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*/
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static void
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da_delete_unmap(struct cam_periph *periph, union ccb *ccb, struct bio *bp)
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{
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struct da_softc *softc = (struct da_softc *)periph->softc;;
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struct bio *bp1;
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uint8_t *buf = softc->unmap_buf;
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uint64_t lba, lastlba = (uint64_t)-1;
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uint64_t totalcount = 0;
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uint64_t count;
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uint32_t lastcount = 0, c;
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uint32_t off, ranges = 0;
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/*
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* Currently this doesn't take the UNMAP
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* Granularity and Granularity Alignment
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* fields into account.
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*
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* This could result in both unoptimal unmap
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* requests as as well as UNMAP calls unmapping
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* fewer LBA's than requested.
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*/
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softc->delete_running = 1;
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bzero(softc->unmap_buf, sizeof(softc->unmap_buf));
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bp1 = bp;
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do {
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bioq_remove(&softc->delete_queue, bp1);
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if (bp1 != bp)
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bioq_insert_tail(&softc->delete_run_queue, bp1);
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lba = bp1->bio_pblkno;
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count = bp1->bio_bcount / softc->params.secsize;
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/* Try to extend the previous range. */
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if (lba == lastlba) {
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c = min(count, softc->unmap_max_lba - lastcount);
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lastcount += c;
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off = ((ranges - 1) * UNMAP_RANGE_SIZE) +
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UNMAP_HEAD_SIZE;
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scsi_ulto4b(lastcount, &buf[off + 8]);
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count -= c;
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lba +=c;
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totalcount += c;
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}
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while (count > 0) {
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c = min(count, softc->unmap_max_lba);
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if (totalcount + c > softc->unmap_max_lba ||
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ranges >= softc->unmap_max_ranges) {
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xpt_print(periph->path,
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"%s issuing short delete %ld > %ld"
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"|| %d >= %d",
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da_delete_method_desc[softc->delete_method],
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totalcount + c, softc->unmap_max_lba,
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ranges, softc->unmap_max_ranges);
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break;
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}
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off = (ranges * UNMAP_RANGE_SIZE) + UNMAP_HEAD_SIZE;
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scsi_u64to8b(lba, &buf[off + 0]);
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scsi_ulto4b(c, &buf[off + 8]);
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lba += c;
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totalcount += c;
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ranges++;
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count -= c;
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lastcount = c;
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}
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lastlba = lba;
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bp1 = bioq_first(&softc->delete_queue);
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if (bp1 == NULL || ranges >= softc->unmap_max_ranges ||
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totalcount + bp1->bio_bcount /
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softc->params.secsize > softc->unmap_max_lba)
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break;
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} while (1);
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scsi_ulto2b(ranges * 16 + 6, &buf[0]);
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scsi_ulto2b(ranges * 16, &buf[2]);
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scsi_unmap(&ccb->csio,
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/*retries*/da_retry_count,
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/*cbfcnp*/dadone,
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/*tag_action*/MSG_SIMPLE_Q_TAG,
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/*byte2*/0,
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/*data_ptr*/ buf,
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/*dxfer_len*/ ranges * 16 + 8,
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/*sense_len*/SSD_FULL_SIZE,
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da_default_timeout * 1000);
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ccb->ccb_h.ccb_state = DA_CCB_DELETE;
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}
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static void
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da_delete_trim(struct cam_periph *periph, union ccb *ccb, struct bio *bp)
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{
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struct da_softc *softc = (struct da_softc *)periph->softc;
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struct bio *bp1;
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uint8_t *buf = softc->unmap_buf;
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uint64_t lastlba = (uint64_t)-1;
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uint64_t count;
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uint64_t lba;
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uint32_t lastcount = 0, c, requestcount;
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int ranges = 0, off, block_count;
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softc->delete_running = 1;
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bzero(softc->unmap_buf, sizeof(softc->unmap_buf));
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bp1 = bp;
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do {
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bioq_remove(&softc->delete_queue, bp1);
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if (bp1 != bp)
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bioq_insert_tail(&softc->delete_run_queue, bp1);
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lba = bp1->bio_pblkno;
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count = bp1->bio_bcount / softc->params.secsize;
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requestcount = count;
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/* Try to extend the previous range. */
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if (lba == lastlba) {
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c = min(count, ATA_DSM_RANGE_MAX - lastcount);
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lastcount += c;
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off = (ranges - 1) * 8;
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buf[off + 6] = lastcount & 0xff;
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buf[off + 7] = (lastcount >> 8) & 0xff;
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count -= c;
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lba += c;
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}
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while (count > 0) {
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c = min(count, ATA_DSM_RANGE_MAX);
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off = ranges * 8;
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buf[off + 0] = lba & 0xff;
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buf[off + 1] = (lba >> 8) & 0xff;
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buf[off + 2] = (lba >> 16) & 0xff;
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buf[off + 3] = (lba >> 24) & 0xff;
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buf[off + 4] = (lba >> 32) & 0xff;
|
||||
buf[off + 5] = (lba >> 40) & 0xff;
|
||||
buf[off + 6] = c & 0xff;
|
||||
buf[off + 7] = (c >> 8) & 0xff;
|
||||
lba += c;
|
||||
ranges++;
|
||||
count -= c;
|
||||
lastcount = c;
|
||||
if (count != 0 && ranges == softc->trim_max_ranges) {
|
||||
xpt_print(periph->path,
|
||||
"%s issuing short delete %ld > %ld",
|
||||
da_delete_method_desc[softc->delete_method],
|
||||
requestcount,
|
||||
(softc->trim_max_ranges - ranges) *
|
||||
ATA_DSM_RANGE_MAX);
|
||||
break;
|
||||
}
|
||||
}
|
||||
lastlba = lba;
|
||||
bp1 = bioq_first(&softc->delete_queue);
|
||||
if (bp1 == NULL || bp1->bio_bcount / softc->params.secsize >
|
||||
(softc->trim_max_ranges - ranges) * ATA_DSM_RANGE_MAX)
|
||||
break;
|
||||
} while (1);
|
||||
|
||||
block_count = (ranges + ATA_DSM_BLK_RANGES - 1) / ATA_DSM_BLK_RANGES;
|
||||
scsi_ata_trim(&ccb->csio,
|
||||
/*retries*/da_retry_count,
|
||||
/*cbfcnp*/dadone,
|
||||
/*tag_action*/MSG_SIMPLE_Q_TAG,
|
||||
block_count,
|
||||
/*data_ptr*/buf,
|
||||
/*dxfer_len*/block_count * ATA_DSM_BLK_SIZE,
|
||||
/*sense_len*/SSD_FULL_SIZE,
|
||||
da_default_timeout * 1000);
|
||||
ccb->ccb_h.ccb_state = DA_CCB_DELETE;
|
||||
}
|
||||
|
||||
/*
|
||||
* We calculate ws_max_blks here based off d_delmaxsize instead
|
||||
* of using softc->ws_max_blks as it is absolute max for the
|
||||
* device not the protocol max which may well be lower
|
||||
*/
|
||||
static void
|
||||
da_delete_ws(struct cam_periph *periph, union ccb *ccb, struct bio *bp)
|
||||
{
|
||||
struct da_softc *softc;
|
||||
struct bio *bp1;
|
||||
uint64_t ws_max_blks;
|
||||
uint64_t lba;
|
||||
uint64_t count; /* forward compat with WS32 */
|
||||
|
||||
softc = (struct da_softc *)periph->softc;
|
||||
ws_max_blks = softc->disk->d_delmaxsize / softc->params.secsize;
|
||||
softc->delete_running = 1;
|
||||
lba = bp->bio_pblkno;
|
||||
count = 0;
|
||||
bp1 = bp;
|
||||
do {
|
||||
bioq_remove(&softc->delete_queue, bp1);
|
||||
if (bp1 != bp)
|
||||
bioq_insert_tail(&softc->delete_run_queue, bp1);
|
||||
count += bp1->bio_bcount / softc->params.secsize;
|
||||
if (count > ws_max_blks) {
|
||||
count = min(count, ws_max_blks);
|
||||
xpt_print(periph->path,
|
||||
"%s issuing short delete %ld > %ld",
|
||||
da_delete_method_desc[softc->delete_method],
|
||||
count, ws_max_blks);
|
||||
break;
|
||||
}
|
||||
bp1 = bioq_first(&softc->delete_queue);
|
||||
if (bp1 == NULL || lba + count != bp1->bio_pblkno ||
|
||||
count + bp1->bio_bcount /
|
||||
softc->params.secsize > ws_max_blks)
|
||||
break;
|
||||
} while (1);
|
||||
|
||||
scsi_write_same(&ccb->csio,
|
||||
/*retries*/da_retry_count,
|
||||
/*cbfcnp*/dadone,
|
||||
/*tag_action*/MSG_SIMPLE_Q_TAG,
|
||||
/*byte2*/softc->delete_method ==
|
||||
DA_DELETE_ZERO ? 0 : SWS_UNMAP,
|
||||
softc->delete_method == DA_DELETE_WS16 ? 16 : 10,
|
||||
/*lba*/lba,
|
||||
/*block_count*/count,
|
||||
/*data_ptr*/ __DECONST(void *, zero_region),
|
||||
/*dxfer_len*/ softc->params.secsize,
|
||||
/*sense_len*/SSD_FULL_SIZE,
|
||||
da_default_timeout * 1000);
|
||||
ccb->ccb_h.ccb_state = DA_CCB_DELETE;
|
||||
}
|
||||
|
||||
static int
|
||||
cmd6workaround(union ccb *ccb)
|
||||
{
|
||||
|
Loading…
Reference in New Issue
Block a user