ide: add ide_tf_load() helper

Based on the earlier work by Tejun Heo.

* Add 'tf_flags' field (for taskfile flags) to ide_task_t.

* Add IDE_TFLAG_LBA48 taskfile flag for LBA48 taskfiles.

* Add IDE_TFLAG_NO_SELECT_MASK taskfile flag for __ide_do_rw_disk()
  which doesn't use SELECT_MASK() (looks like a bug but it requires
  some more investigation).

* Split off ide_tf_load() helper from do_rw_taskfile().

* Convert __ide_do_rw_disk() to use ide_tf_load().

There should be no functionality changes caused by this patch.

Cc: Tejun Heo <htejun@gmail.com>
Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/include/linux/ide.h b/include/linux/ide.h
index 69b78bb39caf..e25fd0b1dd79 100644
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -1060,6 +1060,11 @@ extern void ide_end_drive_cmd(ide_drive_t *, u8, u8);
  */
 extern int ide_wait_cmd(ide_drive_t *, u8, u8, u8, u8, u8 *);
 
+enum {
+        IDE_TFLAG_LBA48                 = (1 << 0),
+        IDE_TFLAG_NO_SELECT_MASK        = (1 << 1),
+};
+
 struct ide_taskfile {
         u8      hob_data;       /*  0: high data byte (for TASKFILE IOCTL) */
 
@@ -1094,6 +1099,7 @@ typedef struct ide_task_s {
                 struct ide_taskfile     tf;
                 u8                      tf_array[14];
         };
+        u8                      tf_flags;
         ide_reg_valid_t         tf_out_flags;
         ide_reg_valid_t         tf_in_flags;
         int                     data_phase;
@@ -1104,6 +1110,8 @@ typedef struct ide_task_s {
         void                    *special;       /* valid_t generally */
 } ide_task_t;
 
+void ide_tf_load(ide_drive_t *, ide_task_t *);
+
 extern u32 ide_read_24(ide_drive_t *);
 
 extern void SELECT_DRIVE(ide_drive_t *);