libata: add @is_cmd to ata_tf_to_fis()

Add @is_cmd to ata_tf_to_fis().  This controls bit 7 of the second
byte which tells the device whether this H2D FIS is for a command or
not.  This cleans up ahci a bit and will be used by PMP.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

5 files changed, 16 insertions, 15 deletions

diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index eaec5e506f5e..61c5b6e68de4 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -1020,8 +1020,7 @@ static int ahci_softreset(struct ata_port *ap, unsigned int *class,
                            cmd_fis_len | AHCI_CMD_RESET | AHCI_CMD_CLR_BUSY);
 
         tf.ctl |= ATA_SRST;
-        ata_tf_to_fis(&tf, fis, 0);
-        fis[1] &= ~(1 << 7);    /* turn off Command FIS bit */
+        ata_tf_to_fis(&tf, 0, 0, fis);
 
         writel(1, port_mmio + PORT_CMD_ISSUE);
 
@@ -1039,8 +1038,7 @@ static int ahci_softreset(struct ata_port *ap, unsigned int *class,
         ahci_fill_cmd_slot(pp, 0, cmd_fis_len);
 
         tf.ctl &= ~ATA_SRST;
-        ata_tf_to_fis(&tf, fis, 0);
-        fis[1] &= ~(1 << 7);    /* turn off Command FIS bit */
+        ata_tf_to_fis(&tf, 0, 0, fis);
 
         writel(1, port_mmio + PORT_CMD_ISSUE);
         readl(port_mmio + PORT_CMD_ISSUE);      /* flush */
@@ -1088,7 +1086,7 @@ static int ahci_hardreset(struct ata_port *ap, unsigned int *class,
         /* clear D2H reception area to properly wait for D2H FIS */
         ata_tf_init(ap->device, &tf);
         tf.command = 0x80;
-        ata_tf_to_fis(&tf, d2h_fis, 0);
+        ata_tf_to_fis(&tf, 0, 0, d2h_fis);
 
         rc = sata_std_hardreset(ap, class, deadline);
 
@@ -1205,7 +1203,7 @@ static void ahci_qc_prep(struct ata_queued_cmd *qc)
          */
         cmd_tbl = pp->cmd_tbl + qc->tag * AHCI_CMD_TBL_SZ;
 
-        ata_tf_to_fis(&qc->tf, cmd_tbl, 0);
+        ata_tf_to_fis(&qc->tf, 0, 1, cmd_tbl);
         if (is_atapi) {
                 memset(cmd_tbl + AHCI_CMD_TBL_CDB, 0, 32);
                 memcpy(cmd_tbl + AHCI_CMD_TBL_CDB, qc->cdb, qc->dev->cdb_len);
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index e2ecb7a4628e..39a8e986a4ea 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -111,8 +111,9 @@ MODULE_VERSION(DRV_VERSION);
 /**
  *      ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure
  *      @tf: Taskfile to convert
- *      @fis: Buffer into which data will output
  *      @pmp: Port multiplier port
+ *      @is_cmd: This FIS is for command
+ *      @fis: Buffer into which data will output
  *
  *      Converts a standard ATA taskfile to a Serial ATA
  *      FIS structure (Register - Host to Device).
@@ -120,12 +121,13 @@ MODULE_VERSION(DRV_VERSION);
  *      LOCKING:
  *      Inherited from caller.
  */
-
-void ata_tf_to_fis(const struct ata_taskfile *tf, u8 *fis, u8 pmp)
+void ata_tf_to_fis(const struct ata_taskfile *tf, u8 pmp, int is_cmd, u8 *fis)
 {
-        fis[0] = 0x27;  /* Register - Host to Device FIS */
-        fis[1] = (pmp & 0xf) | (1 << 7); /* Port multiplier number,
-                                            bit 7 indicates Command FIS */
+        fis[0] = 0x27;                  /* Register - Host to Device FIS */
+        fis[1] = pmp & 0xf;             /* Port multiplier number*/
+        if (is_cmd)
+                fis[1] |= (1 << 7);     /* bit 7 indicates Command FIS */
+
         fis[2] = tf->command;
         fis[3] = tf->feature;
 
diff --git a/drivers/ata/sata_qstor.c b/drivers/ata/sata_qstor.c
index 9ab554da89bf..5aef4ac37012 100644
--- a/drivers/ata/sata_qstor.c
+++ b/drivers/ata/sata_qstor.c
@@ -337,7 +337,7 @@ static void qs_qc_prep(struct ata_queued_cmd *qc)
         buf[28] = dflags;
 
         /* frame information structure (FIS) */
-        ata_tf_to_fis(&qc->tf, &buf[32], 0);
+        ata_tf_to_fis(&qc->tf, 0, 1, &buf[32]);
 }
 
 static inline void qs_packet_start(struct ata_queued_cmd *qc)
diff --git a/drivers/ata/sata_sil24.c b/drivers/ata/sata_sil24.c
index ac43a30ebe29..a11007b5071e 100644
--- a/drivers/ata/sata_sil24.c
+++ b/drivers/ata/sata_sil24.c
@@ -699,7 +699,7 @@ static void sil24_qc_prep(struct ata_queued_cmd *qc)
         }
 
         prb->ctrl = cpu_to_le16(ctrl);
-        ata_tf_to_fis(&qc->tf, prb->fis, 0);
+        ata_tf_to_fis(&qc->tf, 0, 1, prb->fis);
 
         if (qc->flags & ATA_QCFLAG_DMAMAP)
                 sil24_fill_sg(qc, sge);
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 47cd2a1c5544..5d3df6cde272 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -764,7 +764,8 @@ extern unsigned int ata_dev_try_classify(struct ata_port *, unsigned int, u8 *);
  */
 extern void ata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
 extern void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
-extern void ata_tf_to_fis(const struct ata_taskfile *tf, u8 *fis, u8 pmp);
+extern void ata_tf_to_fis(const struct ata_taskfile *tf,
+                          u8 pmp, int is_cmd, u8 *fis);
 extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
 extern void ata_noop_dev_select (struct ata_port *ap, unsigned int device);
 extern void ata_std_dev_select (struct ata_port *ap, unsigned int device);