From ab5b296feb0bec49dfe5ed44f70967ac706e5ec5 Mon Sep 17 00:00:00 2001
From: Kenneth R Westerback <krw@cvs.openbsd.org>
Date: Mon, 25 Oct 2010 10:36:50 +0000
Subject: Iopoolification. Tested by mcbride@, dlg@, and Gabriel Kihlman on
 tech@.

ok dlg@
---
 sys/dev/sdmmc/sdmmc_scsi.c | 50 +++++++++++++++++++++++-----------------------
 1 file changed, 25 insertions(+), 25 deletions(-)

(limited to 'sys/dev/sdmmc/sdmmc_scsi.c')

diff --git a/sys/dev/sdmmc/sdmmc_scsi.c b/sys/dev/sdmmc/sdmmc_scsi.c
index 2393278b082..98256ceab30 100644
--- a/sys/dev/sdmmc/sdmmc_scsi.c
+++ b/sys/dev/sdmmc/sdmmc_scsi.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: sdmmc_scsi.c,v 1.25 2010/08/24 14:52:23 blambert Exp $	*/
+/*	$OpenBSD: sdmmc_scsi.c,v 1.26 2010/10/25 10:36:49 krw Exp $	*/
 
 /*
  * Copyright (c) 2006 Uwe Stuehler <uwe@openbsd.org>
@@ -70,12 +70,14 @@ struct sdmmc_scsi_softc {
 	struct sdmmc_ccb *sc_ccbs;		/* allocated ccbs */
 	struct sdmmc_ccb_list sc_ccb_freeq;	/* free ccbs */
 	struct sdmmc_ccb_list sc_ccb_runq;	/* queued ccbs */
+	struct mutex sc_ccb_mtx;
+	struct scsi_iopool sc_iopool;
 };
 
 int	sdmmc_alloc_ccbs(struct sdmmc_scsi_softc *, int);
 void	sdmmc_free_ccbs(struct sdmmc_scsi_softc *);
-struct sdmmc_ccb *sdmmc_get_ccb(struct sdmmc_scsi_softc *, int);
-void	sdmmc_put_ccb(struct sdmmc_ccb *);
+void	*sdmmc_ccb_alloc(void *);
+void	sdmmc_ccb_free(void *, void *);
 
 void	sdmmc_scsi_cmd(struct scsi_xfer *);
 void	sdmmc_start_xs(struct sdmmc_softc *, struct sdmmc_ccb *);
@@ -133,6 +135,7 @@ sdmmc_scsi_attach(struct sdmmc_softc *sc)
 	scbus->sc_link.luns = 1;
 	scbus->sc_link.openings = 1;
 	scbus->sc_link.adapter = &scbus->sc_adapter;
+	scbus->sc_link.pool = &scbus->sc_iopool;
 
 	bzero(&saa, sizeof(saa));
 	saa.scsi_link = &scbus->sc_link;
@@ -200,6 +203,9 @@ sdmmc_alloc_ccbs(struct sdmmc_scsi_softc *scbus, int nccbs)
 
 	TAILQ_INIT(&scbus->sc_ccb_freeq);
 	TAILQ_INIT(&scbus->sc_ccb_runq);
+	mtx_init(&scbus->sc_ccb_mtx, IPL_BIO);
+	scsi_iopool_init(&scbus->sc_iopool, scbus, sdmmc_ccb_alloc,
+	    sdmmc_ccb_free);
 
 	for (i = 0; i < nccbs; i++) {
 		ccb = &scbus->sc_ccbs[i];
@@ -222,40 +228,42 @@ sdmmc_free_ccbs(struct sdmmc_scsi_softc *scbus)
 	}
 }
 
-struct sdmmc_ccb *
-sdmmc_get_ccb(struct sdmmc_scsi_softc *scbus, int flags)
+void *
+sdmmc_ccb_alloc(void *xscbus)
 {
+	struct sdmmc_scsi_softc *scbus = xscbus;
 	struct sdmmc_ccb *ccb;
-	int s;
 
-	s = splbio();
-	while ((ccb = TAILQ_FIRST(&scbus->sc_ccb_freeq)) == NULL &&
-	    !ISSET(flags, SCSI_NOSLEEP))
-		tsleep(&scbus->sc_ccb_freeq, PRIBIO, "getccb", 0);
+	mtx_enter(&scbus->sc_ccb_mtx);
+	ccb = TAILQ_FIRST(&scbus->sc_ccb_freeq);
 	if (ccb != NULL) {
 		TAILQ_REMOVE(&scbus->sc_ccb_freeq, ccb, ccb_link);
 		ccb->ccb_state = SDMMC_CCB_READY;
 	}
-	splx(s);
+	mtx_leave(&scbus->sc_ccb_mtx);
+
 	return ccb;
 }
 
 void
-sdmmc_put_ccb(struct sdmmc_ccb *ccb)
+sdmmc_ccb_free(void *xscbus, void *xccb)
 {
-	struct sdmmc_scsi_softc *scbus = ccb->ccb_scbus;
+	struct sdmmc_scsi_softc *scbus = xscbus;
+	struct sdmmc_ccb *ccb = xccb;
 	int s;
 
 	s = splbio();
 	if (ccb->ccb_state == SDMMC_CCB_QUEUED)
 		TAILQ_REMOVE(&scbus->sc_ccb_runq, ccb, ccb_link);
+	splx(s);
+
 	ccb->ccb_state = SDMMC_CCB_FREE;
 	ccb->ccb_flags = 0;
 	ccb->ccb_xs = NULL;
+
+	mtx_enter(&scbus->sc_ccb_mtx);
 	TAILQ_INSERT_TAIL(&scbus->sc_ccb_freeq, ccb, ccb_link);
-	if (TAILQ_NEXT(ccb, ccb_link) == NULL)
-		wakeup(&scbus->sc_ccb_freeq);
-	splx(s);
+	mtx_leave(&scbus->sc_ccb_mtx);
 }
 
 /*
@@ -366,16 +374,9 @@ sdmmc_scsi_cmd(struct scsi_xfer *xs)
 		return;
 	}
 
-	ccb = sdmmc_get_ccb(sc->sc_scsibus, xs->flags);
-	if (ccb == NULL) {
-		printf("%s: out of ccbs\n", DEVNAME(sc));
-		xs->error = XS_DRIVER_STUFFUP;
-		scsi_done(xs);
-		return;
-	}
+	ccb = xs->io;
 
 	ccb->ccb_xs = xs;
-
 	ccb->ccb_blockcnt = blockcnt;
 	ccb->ccb_blockno = blockno;
 
@@ -458,7 +459,6 @@ sdmmc_done_xs(struct sdmmc_ccb *ccb)
 	if (ISSET(ccb->ccb_flags, SDMMC_CCB_F_ERR))
 		xs->error = XS_DRIVER_STUFFUP;
 
-	sdmmc_put_ccb(ccb);
 	scsi_done(xs);
 }
 
-- 
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