libata: Implement support for sense data reporting
ACS-4 defines a sense data reporting feature set.
This patch implements support for it.
Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Tejun Heo <tj@kernel.org>
diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index c9b1994..9fa81d9 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -1618,6 +1618,70 @@
}
/**
+ * ata_eh_request_sense - perform REQUEST_SENSE_DATA_EXT
+ * @dev: device to perform REQUEST_SENSE_SENSE_DATA_EXT to
+ * @sense_buf: result sense data buffer (SCSI_SENSE_BUFFERSIZE bytes long)
+ * @dfl_sense_key: default sense key to use
+ *
+ * Perform REQUEST_SENSE_DATA_EXT after the device reported CHECK
+ * SENSE. This function is EH helper.
+ *
+ * LOCKING:
+ * Kernel thread context (may sleep).
+ *
+ * RETURNS:
+ * encoded sense data on success, 0 on failure or if sense data
+ * is not available.
+ */
+static u32 ata_eh_request_sense(struct ata_queued_cmd *qc,
+ struct scsi_cmnd *cmd)
+{
+ struct ata_device *dev = qc->dev;
+ struct ata_taskfile tf;
+ unsigned int err_mask;
+
+ if (!cmd)
+ return 0;
+
+ DPRINTK("ATA request sense\n");
+ ata_dev_warn(dev, "request sense\n");
+ if (!ata_id_sense_reporting_enabled(dev->id)) {
+ ata_dev_warn(qc->dev, "sense data reporting disabled\n");
+ return 0;
+ }
+ ata_tf_init(dev, &tf);
+
+ tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
+ tf.flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48;
+ tf.command = ATA_CMD_REQ_SENSE_DATA;
+ tf.protocol = ATA_PROT_NODATA;
+
+ err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
+ /*
+ * ACS-4 states:
+ * The device may set the SENSE DATA AVAILABLE bit to one in the
+ * STATUS field and clear the ERROR bit to zero in the STATUS field
+ * to indicate that the command returned completion without an error
+ * and the sense data described in table 306 is available.
+ *
+ * IOW the 'ATA_SENSE' bit might not be set even though valid
+ * sense data is available.
+ * So check for both.
+ */
+ if ((tf.command & ATA_SENSE) ||
+ tf.lbah != 0 || tf.lbam != 0 || tf.lbal != 0) {
+ ata_scsi_set_sense(cmd, tf.lbah, tf.lbam, tf.lbal);
+ qc->flags |= ATA_QCFLAG_SENSE_VALID;
+ ata_dev_warn(dev, "sense data %02x/%02x/%02x\n",
+ tf.lbah, tf.lbam, tf.lbal);
+ } else {
+ ata_dev_warn(dev, "request sense failed stat %02x emask %x\n",
+ tf.command, err_mask);
+ }
+ return err_mask;
+}
+
+/**
* atapi_eh_request_sense - perform ATAPI REQUEST_SENSE
* @dev: device to perform REQUEST_SENSE to
* @sense_buf: result sense data buffer (SCSI_SENSE_BUFFERSIZE bytes long)
@@ -1820,7 +1884,22 @@
return ATA_EH_RESET;
}
- /* Set by NCQ autosense */
+ /*
+ * Sense data reporting does not work if the
+ * device fault bit is set.
+ */
+ if ((stat & ATA_SENSE) && !(stat & ATA_DF) &&
+ !(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
+ if (!(qc->ap->pflags & ATA_PFLAG_FROZEN)) {
+ tmp = ata_eh_request_sense(qc, qc->scsicmd);
+ if (tmp)
+ qc->err_mask |= tmp;
+ } else {
+ ata_dev_warn(qc->dev, "sense data available but port frozen\n");
+ }
+ }
+
+ /* Set by NCQ autosense or request sense above */
if (qc->flags & ATA_QCFLAG_SENSE_VALID)
return 0;
@@ -2566,14 +2645,15 @@
#ifdef CONFIG_ATA_VERBOSE_ERROR
if (res->command & (ATA_BUSY | ATA_DRDY | ATA_DF | ATA_DRQ |
- ATA_ERR)) {
+ ATA_SENSE | ATA_ERR)) {
if (res->command & ATA_BUSY)
ata_dev_err(qc->dev, "status: { Busy }\n");
else
- ata_dev_err(qc->dev, "status: { %s%s%s%s}\n",
+ ata_dev_err(qc->dev, "status: { %s%s%s%s%s}\n",
res->command & ATA_DRDY ? "DRDY " : "",
res->command & ATA_DF ? "DF " : "",
res->command & ATA_DRQ ? "DRQ " : "",
+ res->command & ATA_SENSE ? "SENSE " : "",
res->command & ATA_ERR ? "ERR " : "");
}