[libata] ATA passthru (arbitrary ATA command execution)

Authors:
Brett Russ <russb@emc.com>
John W. Linville <linville@tuxdriver.com>
Andy Warner <andyw@pobox.com>

drivers/scsi/libata.h

@@ -44,10 +44,11 @@ extern void ata_dev_select(struct ata_port *ap, unsigned int device,
                            unsigned int wait, unsigned int can_sleep);
 extern void ata_tf_to_host_nolock(struct ata_port *ap, struct ata_taskfile *tf);
 extern void swap_buf_le16(u16 *buf, unsigned int buf_words);
+extern int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg);
+extern int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg);
 
 
 /* libata-scsi.c */
-extern void ata_to_sense_error(struct ata_queued_cmd *qc, u8 drv_stat);
 extern int ata_scsi_error(struct Scsi_Host *host);
 extern unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf,
 			       unsigned int buflen);

include/scsi/scsi.h

@@ -113,6 +113,9 @@ extern const char *const scsi_device_types[MAX_SCSI_DEVICE_CODE];
 /* values for service action in */
 #define	SAI_READ_CAPACITY_16  0x10
 
+/* Values for T10/04-262r7 */
+#define	ATA_16		      0x85	/* 16-byte pass-thru */
+#define	ATA_12		      0xa1	/* 12-byte pass-thru */
 
 /*
  *  SCSI Architecture Model (SAM) Status codes. Taken from SAM-3 draft