libata-eh: Set 'information' field for autosense

If NCQ autosense or the sense data reporting feature is enabled
the LBA of the offending command should be stored in the sense
data 'information' field.

Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Tejun Heo <tj@kernel.org>

drivers/ata/libata-core.c

@@ -691,11 +691,11 @@ static int ata_rwcmd_protocol(struct ata_taskfile *tf, struct ata_device *dev)
  *	RETURNS:
  *	Block address read from @tf.
  */
-u64 ata_tf_read_block(struct ata_taskfile *tf, struct ata_device *dev)
+u64 ata_tf_read_block(const struct ata_taskfile *tf, struct ata_device *dev)
 {
 	u64 block = 0;
 
-	if (tf->flags & ATA_TFLAG_LBA) {
+	if (!dev || tf->flags & ATA_TFLAG_LBA) {
 		if (tf->flags & ATA_TFLAG_LBA48) {
 			block |= (u64)tf->hob_lbah << 40;
 			block |= (u64)tf->hob_lbam << 32;

drivers/ata/libata-eh.c

@@ -1852,6 +1852,7 @@ void ata_eh_analyze_ncq_error(struct ata_link *link)
 		ata_dev_dbg(dev, "NCQ Autosense %02x/%02x/%02x\n",
 			    sense_key, asc, ascq);
 		ata_scsi_set_sense(qc->scsicmd, sense_key, asc, ascq);
+		ata_scsi_set_sense_information(qc->scsicmd, &qc->result_tf);
 		qc->flags |= ATA_QCFLAG_SENSE_VALID;
 	}
 
@@ -1894,6 +1895,8 @@ static unsigned int ata_eh_analyze_tf(struct ata_queued_cmd *qc,
 			tmp = ata_eh_request_sense(qc, qc->scsicmd);
 			if (tmp)
 				qc->err_mask |= tmp;
+			else
+				ata_scsi_set_sense_information(qc->scsicmd, tf);
 		} else {
 			ata_dev_warn(qc->dev, "sense data available but port frozen\n");
 		}

drivers/ata/libata-scsi.c

@@ -280,6 +280,18 @@ void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq)
 	scsi_build_sense_buffer(0, cmd->sense_buffer, sk, asc, ascq);
 }
 
+void ata_scsi_set_sense_information(struct scsi_cmnd *cmd,
+				    const struct ata_taskfile *tf)
+{
+	u64 information;
+
+	if (!cmd)
+		return;
+
+	information = ata_tf_read_block(tf, NULL);
+	scsi_set_sense_information(cmd->sense_buffer, information);
+}
+
 static ssize_t
 ata_scsi_em_message_store(struct device *dev, struct device_attribute *attr,
 			  const char *buf, size_t count)

drivers/ata/libata.h

@@ -67,7 +67,8 @@ extern struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev, int tag);
 extern int ata_build_rw_tf(struct ata_taskfile *tf, struct ata_device *dev,
 			   u64 block, u32 n_block, unsigned int tf_flags,
 			   unsigned int tag);
-extern u64 ata_tf_read_block(struct ata_taskfile *tf, struct ata_device *dev);
+extern u64 ata_tf_read_block(const struct ata_taskfile *tf,
+			     struct ata_device *dev);
 extern unsigned ata_exec_internal(struct ata_device *dev,
 				  struct ata_taskfile *tf, const u8 *cdb,
 				  int dma_dir, void *buf, unsigned int buflen,
@@ -138,6 +139,8 @@ extern int ata_scsi_add_hosts(struct ata_host *host,
 extern void ata_scsi_scan_host(struct ata_port *ap, int sync);
 extern int ata_scsi_offline_dev(struct ata_device *dev);
 extern void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq);
+extern void ata_scsi_set_sense_information(struct scsi_cmnd *cmd,
+					   const struct ata_taskfile *tf);
 extern void ata_scsi_media_change_notify(struct ata_device *dev);
 extern void ata_scsi_hotplug(struct work_struct *work);
 extern void ata_schedule_scsi_eh(struct Scsi_Host *shost);

drivers/scsi/scsi_error.c

@@ -26,6 +26,7 @@
 #include <linux/blkdev.h>
 #include <linux/delay.h>
 #include <linux/jiffies.h>
+#include <asm/unaligned.h>
 
 #include <scsi/scsi.h>
 #include <scsi/scsi_cmnd.h>
@@ -2586,3 +2587,33 @@ void scsi_build_sense_buffer(int desc, u8 *buf, u8 key, u8 asc, u8 ascq)
 	}
 }
 EXPORT_SYMBOL(scsi_build_sense_buffer);
+
+/**
+ * scsi_set_sense_information - set the information field in a
+ *		formatted sense data buffer
+ * @buf:	Where to build sense data
+ * @info:	64-bit information value to be set
+ *
+ **/
+void scsi_set_sense_information(u8 *buf, u64 info)
+{
+	if ((buf[0] & 0x7f) == 0x72) {
+		u8 *ucp, len;
+
+		len = buf[7];
+		ucp = (char *)scsi_sense_desc_find(buf, len + 8, 0);
+		if (!ucp) {
+			buf[7] = len + 0xa;
+			ucp = buf + 8 + len;
+		}
+		ucp[0] = 0;
+		ucp[1] = 0xa;
+		ucp[2] = 0x80; /* Valid bit */
+		ucp[3] = 0;
+		put_unaligned_be64(info, &ucp[4]);
+	} else if ((buf[0] & 0x7f) == 0x70) {
+		buf[0] |= 0x80;
+		put_unaligned_be64(info, &buf[3]);
+	}
+}
+EXPORT_SYMBOL(scsi_set_sense_information);

include/scsi/scsi_eh.h

@@ -59,6 +59,7 @@ extern int scsi_get_sense_info_fld(const u8 * sense_buffer, int sb_len,
 				   u64 * info_out);
 
 extern void scsi_build_sense_buffer(int desc, u8 *buf, u8 key, u8 asc, u8 ascq);
+extern void scsi_set_sense_information(u8 *buf, u64 info);
 
 extern int scsi_ioctl_reset(struct scsi_device *, int __user *);