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Message-Id: <1427471198-62676-8-git-send-email-hare@suse.de>
Date: Fri, 27 Mar 2015 16:46:36 +0100
From: Hannes Reinecke <hare@...e.de>
To: Tejun Heo <tj@...nel.org>
Cc: linux-ide@...r.kernel.org, linux-kernel@...r.kernel.org,
Hannes Reinecke <hare@...e.de>
Subject: [PATCH 7/9] 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@...e.de>
---
drivers/ata/libata-core.c | 20 ++++++++++-
drivers/ata/libata-eh.c | 86 +++++++++++++++++++++++++++++++++++++++++++++--
include/linux/ata.h | 18 ++++++++++
3 files changed, 120 insertions(+), 4 deletions(-)
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index ef150eb..2ff3ab6 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -2144,6 +2144,24 @@ static int ata_dev_config_ncq(struct ata_device *dev,
return 0;
}
+static void ata_dev_config_sense_reporting(struct ata_device *dev)
+{
+ unsigned int err_mask;
+
+ if (!ata_id_has_sense_reporting(dev->id))
+ return;
+
+ if (ata_id_sense_reporting_enabled(dev->id))
+ return;
+
+ err_mask = ata_dev_set_feature(dev, SETFEATURE_SENSE_DATA, 0x1);
+ if (err_mask) {
+ ata_dev_dbg(dev,
+ "failed to enable Sense Data Reporting, Emask 0x%x\n",
+ err_mask);
+ }
+}
+
/**
* ata_dev_configure - Configure the specified ATA/ATAPI device
* @dev: Target device to configure
@@ -2366,7 +2384,7 @@ int ata_dev_configure(struct ata_device *dev)
dev->devslp_timing[i] = sata_setting[j];
}
}
-
+ ata_dev_config_sense_reporting(dev);
dev->cdb_len = 16;
}
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 @@ unsigned int atapi_eh_tur(struct ata_device *dev, u8 *r_sense_key)
}
/**
+ * 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 @@ static unsigned int ata_eh_analyze_tf(struct ata_queued_cmd *qc,
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 @@ static void ata_eh_link_report(struct ata_link *link)
#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 " : "");
}
diff --git a/include/linux/ata.h b/include/linux/ata.h
index 0c65526..b666b77 100644
--- a/include/linux/ata.h
+++ b/include/linux/ata.h
@@ -94,6 +94,8 @@ enum {
ATA_ID_SECTOR_SIZE = 106,
ATA_ID_WWN = 108,
ATA_ID_LOGICAL_SECTOR_SIZE = 117, /* and 118 */
+ ATA_ID_COMMAND_SET_3 = 119,
+ ATA_ID_COMMAND_SET_4 = 120,
ATA_ID_LAST_LUN = 126,
ATA_ID_DLF = 128,
ATA_ID_CSFO = 129,
@@ -382,6 +384,8 @@ enum {
SATA_SSP = 0x06, /* Software Settings Preservation */
SATA_DEVSLP = 0x09, /* Device Sleep */
+ SETFEATURE_SENSE_DATA = 0xC3, /* Sense Data Reporting feature */
+
/* feature values for SET_MAX */
ATA_SET_MAX_ADDR = 0x00,
ATA_SET_MAX_PASSWD = 0x01,
@@ -705,6 +709,20 @@ static inline bool ata_id_has_read_log_dma_ext(const u16 *id)
return id[ATA_ID_COMMAND_SET_3] & (1 << 3);
}
+static inline bool ata_id_has_sense_reporting(const u16 *id)
+{
+ if (!(id[ATA_ID_CFS_ENABLE_2] & (1 << 15)))
+ return false;
+ return id[ATA_ID_COMMAND_SET_3] & (1 << 6);
+}
+
+static inline bool ata_id_sense_reporting_enabled(const u16 *id)
+{
+ if (!(id[ATA_ID_CFS_ENABLE_2] & (1 << 15)))
+ return false;
+ return id[ATA_ID_COMMAND_SET_4] & (1 << 6);
+}
+
/**
* ata_id_major_version - get ATA level of drive
* @id: Identify data
--
1.8.5.2
--
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