[libata] Add ATA transport class

This is a scheleton for libata transport class.
All information is read only, exporting information from libata:
- ata_port class: one per ATA port
- ata_link class: one per ATA port or 15 for SATA Port Multiplier
- ata_device class: up to 2 for PATA link, usually one for SATA.

Signed-off-by: Gwendal Grignou <gwendal@google.com>
Reviewed-by: Grant Grundler <grundler@google.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

1 files changed, 4 insertions, 17 deletions

diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index a89172c100f5..c16f5c151735 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -51,6 +51,7 @@
 #include <asm/unaligned.h>
 
 #include "libata.h"
+#include "libata-transport.h"
 
 #define SECTOR_SIZE             512
 #define ATA_SCSI_RBUF_SIZE      4096
@@ -64,9 +65,6 @@ static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
                                         const struct scsi_device *scsidev);
 static struct ata_device *ata_scsi_find_dev(struct ata_port *ap,
                                             const struct scsi_device *scsidev);
-static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
-                              unsigned int id, unsigned int lun);
-
 
 #define RW_RECOVERY_MPAGE 0x1
 #define RW_RECOVERY_MPAGE_LEN 12
@@ -106,17 +104,6 @@ static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = {
         0, 30   /* extended self test time, see 05-359r1 */
 };
 
-/*
- * libata transport template.  libata doesn't do real transport stuff.
- * It just needs the eh_timed_out hook.
- */
-static struct scsi_transport_template ata_scsi_transport_template = {
-        .eh_strategy_handler    = ata_scsi_error,
-        .eh_timed_out           = ata_scsi_timed_out,
-        .user_scan              = ata_scsi_user_scan,
-};
-
-
 static const struct {
         enum link_pm    value;
         const char      *name;
@@ -3334,7 +3321,7 @@ int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht)
                 *(struct ata_port **)&shost->hostdata[0] = ap;
                 ap->scsi_host = shost;
 
-                shost->transportt = &ata_scsi_transport_template;
+                shost->transportt = ata_scsi_transport_template;
                 shost->unique_id = ap->print_id;
                 shost->max_id = 16;
                 shost->max_lun = 1;
@@ -3616,8 +3603,8 @@ void ata_scsi_hotplug(struct work_struct *work)
  *      RETURNS:
  *      Zero.
  */
-static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
-                              unsigned int id, unsigned int lun)
+int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
+                       unsigned int id, unsigned int lun)
 {
         struct ata_port *ap = ata_shost_to_port(shost);
         unsigned long flags;