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path: root/drivers/ata/libata-core.c
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Diffstat (limited to 'drivers/ata/libata-core.c')
-rw-r--r--drivers/ata/libata-core.c35
1 files changed, 34 insertions, 1 deletions
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 59ce0dd50701..f79d09c9419b 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -739,6 +739,7 @@ u64 ata_tf_read_block(const struct ata_taskfile *tf, struct ata_device *dev)
* @n_block: Number of blocks
* @tf_flags: RW/FUA etc...
* @tag: tag
+ * @class: IO priority class
*
* LOCKING:
* None.
@@ -753,7 +754,7 @@ u64 ata_tf_read_block(const struct ata_taskfile *tf, struct ata_device *dev)
*/
int ata_build_rw_tf(struct ata_taskfile *tf, struct ata_device *dev,
u64 block, u32 n_block, unsigned int tf_flags,
- unsigned int tag)
+ unsigned int tag, int class)
{
tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
tf->flags |= tf_flags;
@@ -785,6 +786,12 @@ int ata_build_rw_tf(struct ata_taskfile *tf, struct ata_device *dev,
tf->device = ATA_LBA;
if (tf->flags & ATA_TFLAG_FUA)
tf->device |= 1 << 7;
+
+ if (dev->flags & ATA_DFLAG_NCQ_PRIO_ENABLE) {
+ if (class == IOPRIO_CLASS_RT)
+ tf->hob_nsect |= ATA_PRIO_HIGH <<
+ ATA_SHIFT_PRIO;
+ }
} else if (dev->flags & ATA_DFLAG_LBA) {
tf->flags |= ATA_TFLAG_LBA;
@@ -2156,6 +2163,30 @@ static void ata_dev_config_ncq_non_data(struct ata_device *dev)
}
}
+static void ata_dev_config_ncq_prio(struct ata_device *dev)
+{
+ struct ata_port *ap = dev->link->ap;
+ unsigned int err_mask;
+
+ err_mask = ata_read_log_page(dev,
+ ATA_LOG_SATA_ID_DEV_DATA,
+ ATA_LOG_SATA_SETTINGS,
+ ap->sector_buf,
+ 1);
+ if (err_mask) {
+ ata_dev_dbg(dev,
+ "failed to get Identify Device data, Emask 0x%x\n",
+ err_mask);
+ return;
+ }
+
+ if (ap->sector_buf[ATA_LOG_NCQ_PRIO_OFFSET] & BIT(3))
+ dev->flags |= ATA_DFLAG_NCQ_PRIO;
+ else
+ ata_dev_dbg(dev, "SATA page does not support priority\n");
+
+}
+
static int ata_dev_config_ncq(struct ata_device *dev,
char *desc, size_t desc_sz)
{
@@ -2205,6 +2236,8 @@ static int ata_dev_config_ncq(struct ata_device *dev,
ata_dev_config_ncq_send_recv(dev);
if (ata_id_has_ncq_non_data(dev->id))
ata_dev_config_ncq_non_data(dev);
+ if (ata_id_has_ncq_prio(dev->id))
+ ata_dev_config_ncq_prio(dev);
}
return 0;