[PATCH] libata irq-pio: add read/write multiple support
- add is_multi_taskfile() to ata.h
- initialize ata_device->multi_count with device identify data
- use ata_pio_sectors() to support r/w multiple commands
Signed-off-by: Albert Lee <albertcc@tw.ibm.com>
========
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
diff --git a/include/linux/ata.h b/include/linux/ata.h
index d54da33..f512104 100644
--- a/include/linux/ata.h
+++ b/include/linux/ata.h
@@ -293,6 +293,14 @@
(tf->protocol == ATA_PROT_ATAPI_DMA);
}
+static inline int is_multi_taskfile(struct ata_taskfile *tf)
+{
+ return (tf->command == ATA_CMD_READ_MULTI) ||
+ (tf->command == ATA_CMD_WRITE_MULTI) ||
+ (tf->command == ATA_CMD_READ_MULTI_EXT) ||
+ (tf->command == ATA_CMD_WRITE_MULTI_EXT);
+}
+
static inline int ata_ok(u8 status)
{
return ((status & (ATA_BUSY | ATA_DRDY | ATA_DF | ATA_DRQ | ATA_ERR))