libata: export xfermode / PATA timing related functions

Export the following xfermode related functions.

* ata_pack_xfermask()
* ata_unpack_xfermask()
* ata_xfer_mask2mode()
* ata_xfer_mode2mask()
* ata_xfer_mode2shift()
* ata_mode_string()
* ata_id_xfermask()
* ata_timing_find_mode()

These functions will be used later by LLD updates.  While at it,
change unsigned short @speed to u8 @xfer_mode in
ata_timing_find_mode() for consistency.

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

2 files changed, 29 insertions, 14 deletions

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 124b6f111cc3..a2f2ff864b37 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -454,9 +454,8 @@ int ata_build_rw_tf(struct ata_taskfile *tf, struct ata_device *dev,
  *      RETURNS:
  *      Packed xfer_mask.
  */
-static unsigned int ata_pack_xfermask(unsigned int pio_mask,
-                                      unsigned int mwdma_mask,
-                                      unsigned int udma_mask)
+unsigned int ata_pack_xfermask(unsigned int pio_mask,
+                               unsigned int mwdma_mask, unsigned int udma_mask)
 {
         return ((pio_mask << ATA_SHIFT_PIO) & ATA_MASK_PIO) |
                 ((mwdma_mask << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA) |
@@ -473,10 +472,8 @@ static unsigned int ata_pack_xfermask(unsigned int pio_mask,
  *      Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask.
  *      Any NULL distination masks will be ignored.
  */
-static void ata_unpack_xfermask(unsigned int xfer_mask,
-                                unsigned int *pio_mask,
-                                unsigned int *mwdma_mask,
-                                unsigned int *udma_mask)
+void ata_unpack_xfermask(unsigned int xfer_mask, unsigned int *pio_mask,
+                         unsigned int *mwdma_mask, unsigned int *udma_mask)
 {
         if (pio_mask)
                 *pio_mask = (xfer_mask & ATA_MASK_PIO) >> ATA_SHIFT_PIO;
@@ -509,7 +506,7 @@ static const struct ata_xfer_ent {
  *      RETURNS:
  *      Matching XFER_* value, 0 if no match found.
  */
-static u8 ata_xfer_mask2mode(unsigned int xfer_mask)
+u8 ata_xfer_mask2mode(unsigned int xfer_mask)
 {
         int highbit = fls(xfer_mask) - 1;
         const struct ata_xfer_ent *ent;
@@ -532,7 +529,7 @@ static u8 ata_xfer_mask2mode(unsigned int xfer_mask)
  *      RETURNS:
  *      Matching xfer_mask, 0 if no match found.
  */
-static unsigned int ata_xfer_mode2mask(u8 xfer_mode)
+unsigned int ata_xfer_mode2mask(u8 xfer_mode)
 {
         const struct ata_xfer_ent *ent;
 
@@ -554,7 +551,7 @@ static unsigned int ata_xfer_mode2mask(u8 xfer_mode)
  *      RETURNS:
  *      Matching xfer_shift, -1 if no match found.
  */
-static int ata_xfer_mode2shift(unsigned int xfer_mode)
+int ata_xfer_mode2shift(unsigned int xfer_mode)
 {
         const struct ata_xfer_ent *ent;
 
@@ -578,7 +575,7 @@ static int ata_xfer_mode2shift(unsigned int xfer_mode)
  *      Constant C string representing highest speed listed in
  *      @mode_mask, or the constant C string "<n/a>".
  */
-static const char *ata_mode_string(unsigned int xfer_mask)
+const char *ata_mode_string(unsigned int xfer_mask)
 {
         static const char * const xfer_mode_str[] = {
                 "PIO0",
@@ -1468,7 +1465,7 @@ static inline void ata_dump_id(const u16 *id)
  *      RETURNS:
  *      Computed xfermask
  */
-static unsigned int ata_id_xfermask(const u16 *id)
+unsigned int ata_id_xfermask(const u16 *id)
 {
         unsigned int pio_mask, mwdma_mask, udma_mask;
 
@@ -2855,11 +2852,11 @@ void ata_timing_merge(const struct ata_timing *a, const struct ata_timing *b,
         if (what & ATA_TIMING_UDMA   ) m->udma    = max(a->udma,    b->udma);
 }
 
-static const struct ata_timing *ata_timing_find_mode(unsigned short speed)
+const struct ata_timing *ata_timing_find_mode(u8 xfer_mode)
 {
         const struct ata_timing *t;
 
-        for (t = ata_timing; t->mode != speed; t++)
+        for (t = ata_timing; t->mode != xfer_mode; t++)
                 if (t->mode == 0xFF)
                         return NULL;
         return t;
@@ -7590,6 +7587,13 @@ EXPORT_SYMBOL_GPL(ata_std_dev_select);
 EXPORT_SYMBOL_GPL(sata_print_link_status);
 EXPORT_SYMBOL_GPL(ata_tf_to_fis);
 EXPORT_SYMBOL_GPL(ata_tf_from_fis);
+EXPORT_SYMBOL_GPL(ata_pack_xfermask);
+EXPORT_SYMBOL_GPL(ata_unpack_xfermask);
+EXPORT_SYMBOL_GPL(ata_xfer_mask2mode);
+EXPORT_SYMBOL_GPL(ata_xfer_mode2mask);
+EXPORT_SYMBOL_GPL(ata_xfer_mode2shift);
+EXPORT_SYMBOL_GPL(ata_mode_string);
+EXPORT_SYMBOL_GPL(ata_id_xfermask);
 EXPORT_SYMBOL_GPL(ata_check_status);
 EXPORT_SYMBOL_GPL(ata_altstatus);
 EXPORT_SYMBOL_GPL(ata_exec_command);
@@ -7655,6 +7659,7 @@ EXPORT_SYMBOL_GPL(ata_id_to_dma_mode);
 EXPORT_SYMBOL_GPL(ata_scsi_simulate);
 
 EXPORT_SYMBOL_GPL(ata_pio_need_iordy);
+EXPORT_SYMBOL_GPL(ata_timing_find_mode);
 EXPORT_SYMBOL_GPL(ata_timing_compute);
 EXPORT_SYMBOL_GPL(ata_timing_merge);
 
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 131fb6625e14..083dd77b120d 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -851,6 +851,15 @@ 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 pmp, int is_cmd, u8 *fis);
 extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
+extern unsigned int ata_pack_xfermask(unsigned int pio_mask,
+                        unsigned int mwdma_mask, unsigned int udma_mask);
+extern void ata_unpack_xfermask(unsigned int xfer_mask, unsigned int *pio_mask,
+                        unsigned int *mwdma_mask, unsigned int *udma_mask);
+extern u8 ata_xfer_mask2mode(unsigned int xfer_mask);
+extern unsigned int ata_xfer_mode2mask(u8 xfer_mode);
+extern int ata_xfer_mode2shift(unsigned int xfer_mode);
+extern const char *ata_mode_string(unsigned int xfer_mask);
+extern unsigned int ata_id_xfermask(const u16 *id);
 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);
 extern u8 ata_check_status(struct ata_port *ap);
@@ -920,6 +929,7 @@ extern int ata_cable_unknown(struct ata_port *ap);
  */
 
 extern unsigned int ata_pio_need_iordy(const struct ata_device *);
+extern const struct ata_timing *ata_timing_find_mode(u8 xfer_mode);
 extern int ata_timing_compute(struct ata_device *, unsigned short,
                               struct ata_timing *, int, int);
 extern void ata_timing_merge(const struct ata_timing *,