[PATCH v5 08/12] libata: detect Device Attention support

Lin Ming
2012-06-18T06:26:02Z

Add a new flag ATA_DFLAG_DA to indicate that device supports "Device
Attention".

Acked-by: Aaron Lu <aaron.lu@amd.com>
Signed-off-by: Lin Ming <ming.m.lin@intel.com>
---
drivers/ata/libata-core.c | 3 +++
include/linux/ata.h | 1 +
include/linux/libata.h | 2 ++
3 files changed, 6 insertions(+)

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index cebf18e..ba169c4 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -2374,6 +2374,9 @@ int ata_dev_configure(struct ata_device *dev)
dma_dir_string = ", DMADIR";
}

+ if (ata_id_has_da(dev->id))
+ dev->flags |= ATA_DFLAG_DA;
+
/* print device info to dmesg */
if (ata_msg_drv(ap) && print_info)
ata_dev_info(dev,
diff --git a/include/linux/ata.h b/include/linux/ata.h
index 32df2b6..5713d3a 100644
--- a/include/linux/ata.h
+++ b/include/linux/ata.h
@@ -578,6 +578,7 @@ static inline int ata_is_data(u8 prot)
((u64) (id)[(n) + 0]) )

#define ata_id_cdb_intr(id) (((id)[ATA_ID_CONFIG] & 0x60) == 0x20)
+#define ata_id_has_da(id) ((id)[77] & (1 << 4))

static inline bool ata_id_has_hipm(const u16 *id)
{
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 888feef..cc22b943 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -161,6 +161,8 @@ enum {
ATA_DFLAG_DETACH = (1 << 24),
ATA_DFLAG_DETACHED = (1 << 25),

+ ATA_DFLAG_DA = (1 << 26), /* device supports Device Attention */
+
ATA_DEV_UNKNOWN = 0, /* unknown device */
ATA_DEV_ATA = 1, /* ATA device */
ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */
--
1.7.10