libata: Populate host-to-device FIS "auxiliary" field

SATA 3.1 added an "auxiliary" field to the host-to-device FIS.
Populate the host-to-device FIS with the new field via the
taskfile struct.

Signed-off-by: Marc Carino <marc.ceeeee@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>

2 files changed, 10 insertions, 4 deletions

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 39e78e4524a3..2b4e92568850 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -546,6 +546,8 @@ int atapi_cmd_type(u8 opcode)
  */
 void ata_tf_to_fis(const struct ata_taskfile *tf, u8 pmp, int is_cmd, u8 *fis)
 {
+        const __le32 aux = cpu_to_le32(tf->auxiliary);
+
         fis[0] = 0x27;                  /* Register - Host to Device FIS */
         fis[1] = pmp & 0xf;             /* Port multiplier number*/
         if (is_cmd)
@@ -569,10 +571,10 @@ void ata_tf_to_fis(const struct ata_taskfile *tf, u8 pmp, int is_cmd, u8 *fis)
         fis[14] = 0;
         fis[15] = tf->ctl;
 
-        fis[16] = 0;
-        fis[17] = 0;
-        fis[18] = 0;
-        fis[19] = 0;
+        fis[16] = aux & 0xff;
+        fis[17] = (aux >> 8) & 0xff;
+        fis[18] = (aux >> 16) & 0xff;
+        fis[19] = (aux >> 24) & 0xff;
 }
 
 /**
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 3198617905e1..9b6ba196179f 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -555,6 +555,10 @@ struct ata_taskfile {
         u8                      device;
 
         u8                      command;        /* IO operation */
+
+        u32                     auxiliary;      /* auxiliary field */
+                                                /* from SATA 3.1 and */
+                                                /* ATA-8 ACS-3 */
 };
 
 #ifdef CONFIG_ATA_SFF