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    Subject[PATCH v6 07/11] libata: detect Device Attention support
    Date
    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 7705191..c14f88c 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


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