From: Marc Carino <marc.ceeeee@xxxxxxxxx>
Add a new port flag, ATA_FLAG_FPDMA_AUX, used to indicate
support for transmission of the H2D FIS 'auxiliary' field.
Signed-off-by: Marc Carino <marc.ceeeee@xxxxxxxxx>
---
drivers/ata/ahci.c | 8 ++++++++
include/linux/libata.h | 1 +
2 files changed, 9 insertions(+)
diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index 5064f3e..8d41c57 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -1288,6 +1288,14 @@ static int ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
*/
if (!(hpriv->flags & AHCI_HFLAG_NO_FPDMA_AA))
pi.flags |= ATA_FLAG_FPDMA_AA;
+
+ /*
+ * All AHCI controllers should be forward-compatible
+ * with the new auxiliary field. This code should be
+ * conditionalized if any buggy AHCI controllers are
+ * encountered.
+ */
+ pi.flags |= ATA_FLAG_FPDMA_AUX;
}
if (hpriv->cap & HOST_CAP_PMP)
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 47122f4..6539c50 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -223,6 +223,7 @@ enum {
ATA_FLAG_ACPI_SATA = (1 << 17), /* need native SATA ACPI layout */
ATA_FLAG_AN = (1 << 18), /* controller supports AN */
ATA_FLAG_PMP = (1 << 19), /* controller supports PMP */
+ ATA_FLAG_FPDMA_AUX = (1 << 20), /* controller supports H2DFIS aux field */
ATA_FLAG_EM = (1 << 21), /* driver supports enclosure
* management */
ATA_FLAG_SW_ACTIVITY = (1 << 22), /* driver supports sw activity
--
1.8.1.2
--
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