[PATCH] libata-ncq: implement NCQ device configuration

Now that all NCQ related stuff are in place, implement NCQ device
configuration and bump ATA_MAX_QUEUE to 32 thus activating NCQ
support.

Original implementation is from Jens Axboe.

Signed-off-by: Tejun Heo <htejun@gmail.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/include/linux/libata.h b/include/linux/libata.h
index dd0db2d21bc5..fcdd798bb086 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -109,7 +109,7 @@ enum {
         ATA_MAX_PORTS           = 8,
         ATA_DEF_QUEUE           = 1,
         /* tag ATA_MAX_QUEUE - 1 is reserved for internal commands */
-        ATA_MAX_QUEUE           = 2,
+        ATA_MAX_QUEUE           = 32,
         ATA_TAG_INTERNAL        = ATA_MAX_QUEUE - 1,
         ATA_MAX_SECTORS         = 200,  /* FIXME */
         ATA_MAX_BUS             = 2,
@@ -679,6 +679,8 @@ extern int ata_std_bios_param(struct scsi_device *sdev,
                               struct block_device *bdev,
                               sector_t capacity, int geom[]);
 extern int ata_scsi_slave_config(struct scsi_device *sdev);
+extern int ata_scsi_change_queue_depth(struct scsi_device *sdev,
+                                       int queue_depth);
 extern struct ata_device *ata_dev_pair(struct ata_device *adev);
 
 /*