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libata: detect Device Attention support 

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>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
This commit is contained in:
Lin Ming 2012-06-25 16:13:08 +08:00 committed by Jeff Garzik
parent a606dac368
commit b1354cbb5b
3 changed files with 6 additions and 0 deletions
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3
drivers/ata/libata-core.c
View File

@ -2374,6 +2374,9 @@ int ata_dev_configure(struct ata_device *dev)
dma_dir_string = ", DMADIR"; dma_dir_string = ", DMADIR";
} }
if (ata_id_has_da(dev->id))
dev->flags |= ATA_DFLAG_DA;
/* print device info to dmesg */ /* print device info to dmesg */
if (ata_msg_drv(ap) && print_info) if (ata_msg_drv(ap) && print_info)
ata_dev_info(dev, ata_dev_info(dev,

1
include/linux/ata.h
View File

@ -578,6 +578,7 @@ static inline int ata_is_data(u8 prot)
((u64) (id)[(n) + 0]) ) ((u64) (id)[(n) + 0]) )
#define ata_id_cdb_intr(id) (((id)[ATA_ID_CONFIG] & 0x60) == 0x20) #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) static inline bool ata_id_has_hipm(const u16 *id)
{ {

2
include/linux/libata.h
View File

@ -161,6 +161,8 @@ enum {
ATA_DFLAG_DETACH = (1 << 24), ATA_DFLAG_DETACH = (1 << 24),
ATA_DFLAG_DETACHED = (1 << 25), ATA_DFLAG_DETACHED = (1 << 25),
ATA_DFLAG_DA = (1 << 26), /* device supports Device Attention */
ATA_DEV_UNKNOWN = 0, /* unknown device */ ATA_DEV_UNKNOWN = 0, /* unknown device */
ATA_DEV_ATA = 1, /* ATA device */ ATA_DEV_ATA = 1, /* ATA device */
ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */ ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */