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Date:      Mon, 21 Oct 2013 08:57:28 +0000 (UTC)
From:      Alexander Motin <mav@FreeBSD.org>
To:        src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org
Subject:   svn commit: r256836 - head/sys/cam/ata
Message-ID:  <201310210857.r9L8vSmf056945@svn.freebsd.org>
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Author: mav
Date: Mon Oct 21 08:57:27 2013
New Revision: 256836
URL: http://svnweb.freebsd.org/changeset/base/256836

Log:
  MFprojects/camlock:
  Remove hard limit on number of BIOs handled with one ATA TRIM request.

Modified:
  head/sys/cam/ata/ata_da.c

Modified: head/sys/cam/ata/ata_da.c
==============================================================================
--- head/sys/cam/ata/ata_da.c	Mon Oct 21 08:49:46 2013	(r256835)
+++ head/sys/cam/ata/ata_da.c	Mon Oct 21 08:57:27 2013	(r256836)
@@ -123,10 +123,9 @@ struct disk_params {
 
 #define TRIM_MAX_BLOCKS	8
 #define TRIM_MAX_RANGES	(TRIM_MAX_BLOCKS * ATA_DSM_BLK_RANGES)
-#define TRIM_MAX_BIOS	(TRIM_MAX_RANGES * 4)
 struct trim_request {
 	uint8_t		data[TRIM_MAX_RANGES * ATA_DSM_RANGE_SIZE];
-	struct bio	*bps[TRIM_MAX_BIOS];
+	TAILQ_HEAD(, bio) bps;
 };
 
 struct ada_softc {
@@ -1427,10 +1426,11 @@ adastart(struct cam_periph *periph, unio
 			struct trim_request *req = &softc->trim_req;
 			struct bio *bp1;
 			uint64_t lastlba = (uint64_t)-1;
-			int bps = 0, c, lastcount = 0, off, ranges = 0;
+			int c, lastcount = 0, off, ranges = 0;
 
 			softc->trim_running = 1;
 			bzero(req, sizeof(*req));
+			TAILQ_INIT(&req->bps);
 			bp1 = bp;
 			do {
 				uint64_t lba = bp1->bio_pblkno;
@@ -1473,10 +1473,9 @@ adastart(struct cam_periph *periph, unio
 					 */
 				}
 				lastlba = lba;
-				req->bps[bps++] = bp1;
+				TAILQ_INSERT_TAIL(&req->bps, bp1, bio_queue);
 				bp1 = bioq_first(&softc->trim_queue);
-				if (bps >= TRIM_MAX_BIOS ||
-				    bp1 == NULL ||
+				if (bp1 == NULL ||
 				    bp1->bio_bcount / softc->params.secsize >
 				    (softc->trim_max_ranges - ranges) *
 				    ATA_DSM_RANGE_MAX)
@@ -1764,23 +1763,22 @@ adadone(struct cam_periph *periph, union
 		if (softc->outstanding_cmds == 0)
 			softc->flags |= ADA_FLAG_WENT_IDLE;
 		if (state == ADA_CCB_TRIM) {
-			struct trim_request *req =
-			    (struct trim_request *)ataio->data_ptr;
-			int i;
-
-			for (i = 1; i < TRIM_MAX_BIOS && req->bps[i]; i++) {
-				struct bio *bp1 = req->bps[i];
+			TAILQ_HEAD(, bio) queue;
+			struct bio *bp1;
 
-				bp1->bio_error = bp->bio_error;
-				if (bp->bio_flags & BIO_ERROR) {
+			TAILQ_INIT(&queue);
+			TAILQ_CONCAT(&queue, &softc->trim_req.bps, bio_queue);
+			softc->trim_running = 0;
+			while ((bp1 = TAILQ_FIRST(&queue)) != NULL) {
+				TAILQ_REMOVE(&queue, bp1, bio_queue);
+				bp1->bio_error = error;
+				if (error != 0) {
 					bp1->bio_flags |= BIO_ERROR;
 					bp1->bio_resid = bp1->bio_bcount;
 				} else
 					bp1->bio_resid = 0;
 				biodone(bp1);
 			}
-			softc->trim_running = 0;
-			biodone(bp);
 			adaschedule(periph);
 		} else
 			biodone(bp);

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