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[SCSI] libsas,libata: fix ->change_queue_{depth|type} for sata devices

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Pass queue_depth change requests to libata, and prevent queue_type
changes for ATA devices.

Otherwise:
1/ we do not honor the libata specific restrictions on the queue depth
2/ libsas drivers that do not set sdev->tagged_supported are unable to
   change the queue_depth of ata devices via sysfs

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Acked-by: Jeff Garzik <jgarzik@redhat.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
This commit is contained in:
Dan Williams 2011-09-20 15:10:33 -07:00 committed by James Bottomley
parent 2fc62e2ac3
commit f6e67035a9
4 changed files with 42 additions and 16 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

1
drivers/ata/libata-core.c
View file

@ -6713,6 +6713,7 @@ EXPORT_SYMBOL_GPL(ata_scsi_queuecmd);
EXPORT_SYMBOL_GPL(ata_scsi_slave_config);
EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy);
EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth);
EXPORT_SYMBOL_GPL(__ata_change_queue_depth);
EXPORT_SYMBOL_GPL(sata_scr_valid);
EXPORT_SYMBOL_GPL(sata_scr_read);
EXPORT_SYMBOL_GPL(sata_scr_write);

44
drivers/ata/libata-scsi.c
View file

@ -1215,25 +1215,15 @@ void ata_scsi_slave_destroy(struct scsi_device *sdev)
}
/**
* ata_scsi_change_queue_depth - SCSI callback for queue depth config
* @sdev: SCSI device to configure queue depth for
* @queue_depth: new queue depth
* @reason: calling context
* __ata_change_queue_depth - helper for ata_scsi_change_queue_depth
*
* This is libata standard hostt->change_queue_depth callback.
* SCSI will call into this callback when user tries to set queue
* depth via sysfs.
* libsas and libata have different approaches for associating a sdev to
* its ata_port.
*
* LOCKING:
* SCSI layer (we don't care)
*
* RETURNS:
* Newly configured queue depth.
*/
int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth,
int reason)
int __ata_change_queue_depth(struct ata_port *ap, struct scsi_device *sdev,
int queue_depth, int reason)
{
struct ata_port *ap = ata_shost_to_port(sdev->host);
struct ata_device *dev;
unsigned long flags;
@ -1268,6 +1258,30 @@ int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth,
return queue_depth;
}
/**
* ata_scsi_change_queue_depth - SCSI callback for queue depth config
* @sdev: SCSI device to configure queue depth for
* @queue_depth: new queue depth
* @reason: calling context
*
* This is libata standard hostt->change_queue_depth callback.
* SCSI will call into this callback when user tries to set queue
* depth via sysfs.
*
* LOCKING:
* SCSI layer (we don't care)
*
* RETURNS:
* Newly configured queue depth.
*/
int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth,
int reason)
{
struct ata_port *ap = ata_shost_to_port(sdev->host);
return __ata_change_queue_depth(ap, sdev, queue_depth, reason);
}
/**
* ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
* @qc: Storage for translated ATA taskfile

11
drivers/scsi/libsas/sas_scsi_host.c
View file

@ -808,8 +808,13 @@ void sas_slave_destroy(struct scsi_device *scsi_dev)
int sas_change_queue_depth(struct scsi_device *scsi_dev, int new_depth,
int reason)
{
struct domain_device *dev = sdev_to_domain_dev(scsi_dev);
int res = min(new_depth, SAS_MAX_QD);
if (dev_is_sata(dev))
return __ata_change_queue_depth(dev->sata_dev.ap, scsi_dev,
new_depth, reason);
if (reason != SCSI_QDEPTH_DEFAULT)
return -EOPNOTSUPP;
@ -817,7 +822,6 @@ int sas_change_queue_depth(struct scsi_device *scsi_dev, int new_depth,
scsi_adjust_queue_depth(scsi_dev, scsi_get_tag_type(scsi_dev),
res);
else {
struct domain_device *dev = sdev_to_domain_dev(scsi_dev);
sas_printk("device %llx LUN %x queue depth changed to 1\n",
SAS_ADDR(dev->sas_addr),
scsi_dev->lun);
@ -830,6 +834,11 @@ int sas_change_queue_depth(struct scsi_device *scsi_dev, int new_depth,
int sas_change_queue_type(struct scsi_device *scsi_dev, int qt)
{
struct domain_device *dev = sdev_to_domain_dev(scsi_dev);
if (dev_is_sata(dev))
return -EINVAL;
if (!scsi_dev->tagged_supported)
return 0;

2
include/linux/libata.h
View file

@ -1052,6 +1052,8 @@ extern int ata_scsi_slave_config(struct scsi_device *sdev);
extern void ata_scsi_slave_destroy(struct scsi_device *sdev);
extern int ata_scsi_change_queue_depth(struct scsi_device *sdev,
int queue_depth, int reason);
extern int __ata_change_queue_depth(struct ata_port *ap, struct scsi_device *sdev,
int queue_depth, int reason);
extern struct ata_device *ata_dev_pair(struct ata_device *adev);
extern int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev);
extern void ata_scsi_port_error_handler(struct Scsi_Host *host, struct ata_port *ap);