libata/ahci: enclosure management support

Add Enclosure Management support to libata and ahci.

Signed-off-by:  Kristen Carlson Accardi <kristen.c.accardi@intel.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

1 files changed, 79 insertions, 0 deletions

diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index 57a43649a461..b578b11caa7b 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -190,6 +190,85 @@ static 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);
 }
 
+static ssize_t
+ata_scsi_em_message_store(struct device *dev, struct device_attribute *attr,
+                          const char *buf, size_t count)
+{
+        struct Scsi_Host *shost = class_to_shost(dev);
+        struct ata_port *ap = ata_shost_to_port(shost);
+        if (ap->ops->em_store && (ap->flags & ATA_FLAG_EM))
+                return ap->ops->em_store(ap, buf, count);
+        return -EINVAL;
+}
+
+static ssize_t
+ata_scsi_em_message_show(struct device *dev, struct device_attribute *attr,
+                         char *buf)
+{
+        struct Scsi_Host *shost = class_to_shost(dev);
+        struct ata_port *ap = ata_shost_to_port(shost);
+
+        if (ap->ops->em_show && (ap->flags & ATA_FLAG_EM))
+                return ap->ops->em_show(ap, buf);
+        return -EINVAL;
+}
+DEVICE_ATTR(em_message, S_IRUGO | S_IWUGO,
+                ata_scsi_em_message_show, ata_scsi_em_message_store);
+EXPORT_SYMBOL_GPL(dev_attr_em_message);
+
+static ssize_t
+ata_scsi_em_message_type_show(struct device *dev, struct device_attribute *attr,
+                              char *buf)
+{
+        struct Scsi_Host *shost = class_to_shost(dev);
+        struct ata_port *ap = ata_shost_to_port(shost);
+
+        return snprintf(buf, 23, "%d\n", ap->em_message_type);
+}
+DEVICE_ATTR(em_message_type, S_IRUGO,
+                  ata_scsi_em_message_type_show, NULL);
+EXPORT_SYMBOL_GPL(dev_attr_em_message_type);
+
+static ssize_t
+ata_scsi_activity_show(struct device *dev, struct device_attribute *attr,
+                char *buf)
+{
+        struct scsi_device *sdev = to_scsi_device(dev);
+        struct ata_port *ap = ata_shost_to_port(sdev->host);
+        struct ata_device *atadev = ata_scsi_find_dev(ap, sdev);
+
+        if (ap->ops->sw_activity_show && (ap->flags & ATA_FLAG_SW_ACTIVITY))
+                return ap->ops->sw_activity_show(atadev, buf);
+        return -EINVAL;
+}
+
+static ssize_t
+ata_scsi_activity_store(struct device *dev, struct device_attribute *attr,
+        const char *buf, size_t count)
+{
+        struct scsi_device *sdev = to_scsi_device(dev);
+        struct ata_port *ap = ata_shost_to_port(sdev->host);
+        struct ata_device *atadev = ata_scsi_find_dev(ap, sdev);
+        enum sw_activity val;
+        int rc;
+
+        if (ap->ops->sw_activity_store && (ap->flags & ATA_FLAG_SW_ACTIVITY)) {
+                val = simple_strtoul(buf, NULL, 0);
+                switch (val) {
+                case OFF: case BLINK_ON: case BLINK_OFF:
+                        rc = ap->ops->sw_activity_store(atadev, val);
+                        if (!rc)
+                                return count;
+                        else
+                                return rc;
+                }
+        }
+        return -EINVAL;
+}
+DEVICE_ATTR(sw_activity, S_IWUGO | S_IRUGO, ata_scsi_activity_show,
+                        ata_scsi_activity_store);
+EXPORT_SYMBOL_GPL(dev_attr_sw_activity);
+
 static void ata_scsi_invalid_field(struct scsi_cmnd *cmd,
                                    void (*done)(struct scsi_cmnd *))
 {