Allow unmapped I/O via aacd(4). It shouldn't be too hard to add the

same support for aacp(4), I'm lacking the necessary hardware for
testing, though.

3 files changed, 13 insertions, 6 deletions

diff --git a/sys/dev/aac/aac.c b/sys/dev/aac/aac.c
index 3ceda47..c56aeca 100644
--- a/sys/dev/aac/aac.c
+++ b/sys/dev/aac/aac.c
@@ -987,14 +987,18 @@ aac_startio(struct aac_softc *sc)
 		 * busdma.
 		 */
 		if (cm->cm_datalen != 0) {
-			error = bus_dmamap_load(sc->aac_buffer_dmat,
-						cm->cm_datamap, cm->cm_data,
-						cm->cm_datalen,
-						aac_map_command_sg, cm, 0);
+			if (cm->cm_flags & AAC_REQ_BIO)
+				error = bus_dmamap_load_bio(
+				    sc->aac_buffer_dmat, cm->cm_datamap,
+				    (struct bio *)cm->cm_private,
+				    aac_map_command_sg, cm, 0);
+			else
+				error = bus_dmamap_load(sc->aac_buffer_dmat,
+				    cm->cm_datamap, cm->cm_data,
+				    cm->cm_datalen, aac_map_command_sg, cm, 0);
 			if (error == EINPROGRESS) {
 				fwprintf(sc, HBA_FLAGS_DBG_COMM_B, "freezing queue\n");
 				sc->flags |= AAC_QUEUE_FRZN;
-				error = 0;
 			} else if (error != 0)
 				panic("aac_startio: unexpected error %d from "
 				      "busdma", error);
@@ -1199,9 +1203,9 @@ aac_bio_command(struct aac_softc *sc, struct aac_command **cmp)
 		goto fail;
 
 	/* fill out the command */
-	cm->cm_data = (void *)bp->bio_data;
 	cm->cm_datalen = bp->bio_bcount;
 	cm->cm_complete = aac_bio_complete;
+	cm->cm_flags = AAC_REQ_BIO;
 	cm->cm_private = bp;
 	cm->cm_timestamp = time_uptime;
 
diff --git a/sys/dev/aac/aac_disk.c b/sys/dev/aac/aac_disk.c
index fd89f5e..394e057 100644
--- a/sys/dev/aac/aac_disk.c
+++ b/sys/dev/aac/aac_disk.c
@@ -397,6 +397,7 @@ aac_disk_attach(device_t dev)
 	sc->unit = device_get_unit(dev);
 	sc->ad_disk = disk_alloc();
 	sc->ad_disk->d_drv1 = sc;
+	sc->ad_disk->d_flags = DISKFLAG_UNMAPPED_BIO;
 	sc->ad_disk->d_name = "aacd";
 	sc->ad_disk->d_maxsize = sc->ad_controller->aac_max_sectors << 9;
 	sc->ad_disk->d_open = aac_disk_open;
diff --git a/sys/dev/aac/aacvar.h b/sys/dev/aac/aacvar.h
index f856234..18ae0b2 100644
--- a/sys/dev/aac/aacvar.h
+++ b/sys/dev/aac/aacvar.h
@@ -181,6 +181,8 @@ struct aac_command
 #define AAC_ON_AACQ_MASK	((1<<5)|(1<<6)|(1<<7)|(1<<8)|(1<<10))
 #define AAC_QUEUE_FRZN		(1<<9)		/* Freeze the processing of
 						 * commands on the queue. */
+#define	AAC_REQ_BIO		(1 << 11)
+#define	AAC_REQ_CCB		(1 << 12)
 
 	void			(*cm_complete)(struct aac_command *cm);
 	void			*cm_private;