Add support for using DMA on dump, greatly speeds up the dump process.

Add dump support in ataraid.

1 files changed, 19 insertions, 5 deletions

diff --git a/sys/dev/ata/ata-lowlevel.c b/sys/dev/ata/ata-lowlevel.c
index cca8cc8..0d50ccf 100644
--- a/sys/dev/ata/ata-lowlevel.c
+++ b/sys/dev/ata/ata-lowlevel.c
@@ -46,8 +46,7 @@ __FBSDID("$FreeBSD$");
 #include <ata_if.h>
 
 /* prototypes */
-static int ata_begin_transaction(struct ata_request *);
-static int ata_end_transaction(struct ata_request *);
+static int ata_generic_status(device_t dev);
 static int ata_wait(struct ata_channel *ch, struct ata_device *, u_int8_t);
 static void ata_pio_read(struct ata_request *, int);
 static void ata_pio_write(struct ata_request *, int);
@@ -62,11 +61,12 @@ ata_generic_hw(device_t dev)
 
     ch->hw.begin_transaction = ata_begin_transaction;
     ch->hw.end_transaction = ata_end_transaction;
+    ch->hw.status = ata_generic_status;
     ch->hw.command = ata_generic_command;
 }
 
 /* must be called with ATA channel locked and state_mtx held */
-static int
+int
 ata_begin_transaction(struct ata_request *request)
 {
     struct ata_channel *ch = device_get_softc(device_get_parent(request->dev));
@@ -220,7 +220,7 @@ begin_continue:
 }
 
 /* must be called with ATA channel locked and state_mtx held */
-static int
+int
 ata_end_transaction(struct ata_request *request)
 {
     struct ata_channel *ch = device_get_softc(device_get_parent(request->dev));
@@ -470,7 +470,7 @@ end_continue:
     return ATA_OP_CONTINUES;
 }
 
-/* must be called with ATA channel locked */
+/* must be called with ATA channel locked and state_mtx held */
 void
 ata_generic_reset(device_t dev)
 {
@@ -605,6 +605,20 @@ ata_generic_reset(device_t dev)
 		      "\20\4ATAPI_SLAVE\3ATAPI_MASTER\2ATA_SLAVE\1ATA_MASTER");
 }
 
+/* must be called with ATA channel locked and state_mtx held */
+int
+ata_generic_status(device_t dev)
+{
+    struct ata_channel *ch = device_get_softc(dev);
+
+    if (ATA_IDX_INB(ch, ATA_ALTSTAT) & ATA_S_BUSY) {
+	DELAY(100);
+	if (ATA_IDX_INB(ch, ATA_ALTSTAT) & ATA_S_BUSY)
+	    return 0;
+    }
+    return 1;
+}
+
 static int
 ata_wait(struct ata_channel *ch, struct ata_device *atadev, u_int8_t mask)
 {