1 files changed, 127 insertions, 35 deletions

diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index f3b4b15a8dc4..4b95c4387e9e 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -183,6 +183,105 @@ DEVICE_ATTR(link_power_management_policy, S_IRUGO | S_IWUSR,
                 ata_scsi_lpm_show, ata_scsi_lpm_put);
 EXPORT_SYMBOL_GPL(dev_attr_link_power_management_policy);
 
+static ssize_t ata_scsi_park_show(struct device *device,
+                                  struct device_attribute *attr, char *buf)
+{
+        struct scsi_device *sdev = to_scsi_device(device);
+        struct ata_port *ap;
+        struct ata_link *link;
+        struct ata_device *dev;
+        unsigned long flags;
+        unsigned int uninitialized_var(msecs);
+        int rc = 0;
+
+        ap = ata_shost_to_port(sdev->host);
+
+        spin_lock_irqsave(ap->lock, flags);
+        dev = ata_scsi_find_dev(ap, sdev);
+        if (!dev) {
+                rc = -ENODEV;
+                goto unlock;
+        }
+        if (dev->flags & ATA_DFLAG_NO_UNLOAD) {
+                rc = -EOPNOTSUPP;
+                goto unlock;
+        }
+
+        link = dev->link;
+        if (ap->pflags & ATA_PFLAG_EH_IN_PROGRESS &&
+            link->eh_context.unloaded_mask & (1 << dev->devno) &&
+            time_after(dev->unpark_deadline, jiffies))
+                msecs = jiffies_to_msecs(dev->unpark_deadline - jiffies);
+        else
+                msecs = 0;
+
+unlock:
+        spin_unlock_irq(ap->lock);
+
+        return rc ? rc : snprintf(buf, 20, "%u\n", msecs);
+}
+
+static ssize_t ata_scsi_park_store(struct device *device,
+                                   struct device_attribute *attr,
+                                   const char *buf, size_t len)
+{
+        struct scsi_device *sdev = to_scsi_device(device);
+        struct ata_port *ap;
+        struct ata_device *dev;
+        long int input;
+        unsigned long flags;
+        int rc;
+
+        rc = strict_strtol(buf, 10, &input);
+        if (rc || input < -2)
+                return -EINVAL;
+        if (input > ATA_TMOUT_MAX_PARK) {
+                rc = -EOVERFLOW;
+                input = ATA_TMOUT_MAX_PARK;
+        }
+
+        ap = ata_shost_to_port(sdev->host);
+
+        spin_lock_irqsave(ap->lock, flags);
+        dev = ata_scsi_find_dev(ap, sdev);
+        if (unlikely(!dev)) {
+                rc = -ENODEV;
+                goto unlock;
+        }
+        if (dev->class != ATA_DEV_ATA) {
+                rc = -EOPNOTSUPP;
+                goto unlock;
+        }
+
+        if (input >= 0) {
+                if (dev->flags & ATA_DFLAG_NO_UNLOAD) {
+                        rc = -EOPNOTSUPP;
+                        goto unlock;
+                }
+
+                dev->unpark_deadline = ata_deadline(jiffies, input);
+                dev->link->eh_info.dev_action[dev->devno] |= ATA_EH_PARK;
+                ata_port_schedule_eh(ap);
+                complete(&ap->park_req_pending);
+        } else {
+                switch (input) {
+                case -1:
+                        dev->flags &= ~ATA_DFLAG_NO_UNLOAD;
+                        break;
+                case -2:
+                        dev->flags |= ATA_DFLAG_NO_UNLOAD;
+                        break;
+                }
+        }
+unlock:
+        spin_unlock_irqrestore(ap->lock, flags);
+
+        return rc ? rc : len;
+}
+DEVICE_ATTR(unload_heads, S_IRUGO | S_IWUSR,
+            ata_scsi_park_show, ata_scsi_park_store);
+EXPORT_SYMBOL_GPL(dev_attr_unload_heads);
+
 static void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq)
 {
         cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
@@ -269,6 +368,12 @@ DEVICE_ATTR(sw_activity, S_IWUGO | S_IRUGO, ata_scsi_activity_show,
                         ata_scsi_activity_store);
 EXPORT_SYMBOL_GPL(dev_attr_sw_activity);
 
+struct device_attribute *ata_common_sdev_attrs[] = {
+        &dev_attr_unload_heads,
+        NULL
+};
+EXPORT_SYMBOL_GPL(ata_common_sdev_attrs);
+
 static void ata_scsi_invalid_field(struct scsi_cmnd *cmd,
                                    void (*done)(struct scsi_cmnd *))
 {
@@ -398,7 +503,7 @@ int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg)
         scsi_cmd[0] = ATA_16;
 
         scsi_cmd[4] = args[2];
-        if (args[0] == WIN_SMART) { /* hack -- ide driver does this too... */
+        if (args[0] == ATA_CMD_SMART) { /* hack -- ide driver does this too */
                 scsi_cmd[6]  = args[3];
                 scsi_cmd[8]  = args[1];
                 scsi_cmd[10] = 0x4f;
@@ -603,7 +708,11 @@ static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev,
 {
         struct ata_queued_cmd *qc;
 
-        qc = ata_qc_new_init(dev);
+        if (cmd->request->tag != -1)
+                qc = ata_qc_new_init(dev, cmd->request->tag);
+        else
+                qc = ata_qc_new_init(dev, 0);
+
         if (qc) {
                 qc->scsicmd = cmd;
                 qc->scsidone = done;
@@ -954,6 +1063,9 @@ static int atapi_drain_needed(struct request *rq)
 static int ata_scsi_dev_config(struct scsi_device *sdev,
                                struct ata_device *dev)
 {
+        if (!ata_id_has_unload(dev->id))
+                dev->flags |= ATA_DFLAG_NO_UNLOAD;
+
         /* configure max sectors */
         blk_queue_max_sectors(sdev->request_queue, dev->max_sectors);
 
@@ -977,6 +1089,10 @@ static int ata_scsi_dev_config(struct scsi_device *sdev,
 
                 blk_queue_dma_drain(q, atapi_drain_needed, buf, ATAPI_MAX_DRAIN);
         } else {
+                if (ata_id_is_ssd(dev->id))
+                        queue_flag_set_unlocked(QUEUE_FLAG_NONROT,
+                                                sdev->request_queue);
+
                 /* ATA devices must be sector aligned */
                 blk_queue_update_dma_alignment(sdev->request_queue,
                                                ATA_SECT_SIZE - 1);
@@ -991,7 +1107,8 @@ static int ata_scsi_dev_config(struct scsi_device *sdev,
 
                 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
                 depth = min(ATA_MAX_QUEUE - 1, depth);
-                scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, depth);
+                scsi_set_tag_type(sdev, MSG_SIMPLE_TAG);
+                scsi_activate_tcq(sdev, depth);
         }
 
         return 0;
@@ -1831,6 +1948,11 @@ static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf)
                 hdr[1] |= (1 << 7);
 
         memcpy(rbuf, hdr, sizeof(hdr));
+
+        /* if ncq, set tags supported */
+        if (ata_id_has_ncq(args->id))
+                rbuf[7] |= (1 << 1);
+
         memcpy(&rbuf[8], "ATA     ", 8);
         ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16);
         ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
@@ -2551,36 +2673,6 @@ static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
 }
 
 /**
- *      ata_scsi_dev_enabled - determine if device is enabled
- *      @dev: ATA device
- *
- *      Determine if commands should be sent to the specified device.
- *
- *      LOCKING:
- *      spin_lock_irqsave(host lock)
- *
- *      RETURNS:
- *      0 if commands are not allowed / 1 if commands are allowed
- */
-
-static int ata_scsi_dev_enabled(struct ata_device *dev)
-{
-        if (unlikely(!ata_dev_enabled(dev)))
-                return 0;
-
-        if (!atapi_enabled || (dev->link->ap->flags & ATA_FLAG_NO_ATAPI)) {
-                if (unlikely(dev->class == ATA_DEV_ATAPI)) {
-                        ata_dev_printk(dev, KERN_WARNING,
-                                       "WARNING: ATAPI is %s, device ignored.\n",
-                                       atapi_enabled ? "not supported with this driver" : "disabled");
-                        return 0;
-                }
-        }
-
-        return 1;
-}
-
-/**
  *      ata_scsi_find_dev - lookup ata_device from scsi_cmnd
  *      @ap: ATA port to which the device is attached
  *      @scsidev: SCSI device from which we derive the ATA device
@@ -2601,7 +2693,7 @@ ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
 {
         struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev);
 
-        if (unlikely(!dev || !ata_scsi_dev_enabled(dev)))
+        if (unlikely(!dev || !ata_dev_enabled(dev)))
                 return NULL;
 
         return dev;
@@ -3622,7 +3714,7 @@ int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
 
         ata_scsi_dump_cdb(ap, cmd);
 
-        if (likely(ata_scsi_dev_enabled(ap->link.device)))
+        if (likely(ata_dev_enabled(ap->link.device)))
                 rc = __ata_scsi_queuecmd(cmd, done, ap->link.device);
         else {
                 cmd->result = (DID_BAD_TARGET << 16);