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scsi: libsas: Define NCQ Priority sysfs attributes for SATA devices

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libata sysfs attributes cannot be used for libsas-managed SATA devices
because the ata_port location is different for libsas.

Defined sysfs attributes (visible for SATA devices only):

 - /sys/block/sda/device/ncq_prio_enable
 - /sys/block/sda/device/ncq_prio_supported

The newly defined attributes will pass the correct ata_port to libata
helper functions.

Reviewed-by: John Garry <john.g.garry@oracle.com>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Jason Yan <yanaijie@huawei.com>
Signed-off-by: Igor Pylypiv <ipylypiv@google.com>
Link: https://lore.kernel.org/r/20240307214418.3812290-3-ipylypiv@google.com
Reviewed-by: Niklas Cassel <cassel@kernel.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Igor Pylypiv 2024-03-07 13:44:13 -08:00 committed by Martin K. Petersen
parent abeded46bc
commit b4d3ddd2df
2 changed files with 88 additions and 0 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

82
drivers/scsi/libsas/sas_ata.c
View file

@ -964,3 +964,85 @@ int sas_execute_ata_cmd(struct domain_device *device, u8 *fis, int force_phy_id)
force_phy_id, &tmf_task);
}
EXPORT_SYMBOL_GPL(sas_execute_ata_cmd);
static ssize_t sas_ncq_prio_supported_show(struct device *device,
struct device_attribute *attr,
char *buf)
{
struct scsi_device *sdev = to_scsi_device(device);
struct domain_device *ddev = sdev_to_domain_dev(sdev);
bool supported;
int rc;
rc = ata_ncq_prio_supported(ddev->sata_dev.ap, sdev, &supported);
if (rc)
return rc;
return sysfs_emit(buf, "%d\n", supported);
}
DEVICE_ATTR(ncq_prio_supported, S_IRUGO, sas_ncq_prio_supported_show, NULL);
static ssize_t sas_ncq_prio_enable_show(struct device *device,
struct device_attribute *attr,
char *buf)
{
struct scsi_device *sdev = to_scsi_device(device);
struct domain_device *ddev = sdev_to_domain_dev(sdev);
bool enabled;
int rc;
rc = ata_ncq_prio_enabled(ddev->sata_dev.ap, sdev, &enabled);
if (rc)
return rc;
return sysfs_emit(buf, "%d\n", enabled);
}
static ssize_t sas_ncq_prio_enable_store(struct device *device,
struct device_attribute *attr,
const char *buf, size_t len)
{
struct scsi_device *sdev = to_scsi_device(device);
struct domain_device *ddev = sdev_to_domain_dev(sdev);
bool enable;
int rc;
rc = kstrtobool(buf, &enable);
if (rc)
return rc;
rc = ata_ncq_prio_enable(ddev->sata_dev.ap, sdev, enable);
if (rc)
return rc;
return len;
}
DEVICE_ATTR(ncq_prio_enable, S_IRUGO | S_IWUSR,
sas_ncq_prio_enable_show, sas_ncq_prio_enable_store);
static struct attribute *sas_ata_sdev_attrs[] = {
&dev_attr_ncq_prio_supported.attr,
&dev_attr_ncq_prio_enable.attr,
NULL
};
static umode_t sas_ata_attr_is_visible(struct kobject *kobj,
struct attribute *attr, int i)
{
struct device *dev = kobj_to_dev(kobj);
struct scsi_device *sdev = to_scsi_device(dev);
struct domain_device *ddev = sdev_to_domain_dev(sdev);
if (!dev_is_sata(ddev))
return 0;
return attr->mode;
}
const struct attribute_group sas_ata_sdev_attr_group = {
.attrs = sas_ata_sdev_attrs,
.is_visible = sas_ata_attr_is_visible,
};
EXPORT_SYMBOL_GPL(sas_ata_sdev_attr_group);

6
include/scsi/sas_ata.h
View file

@ -39,6 +39,9 @@ int smp_ata_check_ready_type(struct ata_link *link);
int sas_discover_sata(struct domain_device *dev);
int sas_ata_add_dev(struct domain_device *parent, struct ex_phy *phy,
struct domain_device *child, int phy_id);
extern const struct attribute_group sas_ata_sdev_attr_group;
#else
static inline void sas_ata_disabled_notice(void)
@ -123,6 +126,9 @@ static inline int sas_ata_add_dev(struct domain_device *parent, struct ex_phy *p
sas_ata_disabled_notice();
return -ENODEV;
}
#define sas_ata_sdev_attr_group ((struct attribute_group) {})
#endif
#endif /* _SAS_ATA_H_ */