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Message-ID: <20240305005103.1849325-3-ipylypiv@google.com>
Date: Mon, 4 Mar 2024 16:50:58 -0800
From: Igor Pylypiv <ipylypiv@...gle.com>
To: Damien Le Moal <dlemoal@...nel.org>, Niklas Cassel <cassel@...nel.org>,
John Garry <john.g.garry@...cle.com>, Jason Yan <yanaijie@...wei.com>,
"James E.J. Bottomley" <jejb@...ux.ibm.com>, "Martin K. Petersen" <martin.petersen@...cle.com>,
Jack Wang <jinpu.wang@...ud.ionos.com>, Hannes Reinecke <hare@...e.de>,
Xiang Chen <chenxiang66@...ilicon.com>, Artur Paszkiewicz <artur.paszkiewicz@...el.com>,
Bart Van Assche <bvanassche@....org>
Cc: TJ Adams <tadamsjr@...gle.com>, linux-ide@...r.kernel.org,
linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org,
Igor Pylypiv <ipylypiv@...gle.com>
Subject: [PATCH v5 2/7] scsi: libsas: Define NCQ Priority sysfs attributes for
SATA devices
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@...cle.com>
Reviewed-by: Damien Le Moal <dlemoal@...nel.org>
Signed-off-by: Igor Pylypiv <ipylypiv@...gle.com>
---
drivers/scsi/libsas/sas_ata.c | 94 +++++++++++++++++++++++++++++++++++
include/scsi/sas_ata.h | 6 +++
2 files changed, 100 insertions(+)
diff --git a/drivers/scsi/libsas/sas_ata.c b/drivers/scsi/libsas/sas_ata.c
index 12e2653846e3..04b0bd9a4e01 100644
--- a/drivers/scsi/libsas/sas_ata.c
+++ b/drivers/scsi/libsas/sas_ata.c
@@ -964,3 +964,97 @@ 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;
+
+ /* This attribute shall be visible for SATA devices only */
+ if (WARN_ON_ONCE(!dev_is_sata(ddev)))
+ return -EINVAL;
+
+ 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;
+
+ /* This attribute shall be visible for SATA devices only */
+ if (WARN_ON_ONCE(!dev_is_sata(ddev)))
+ return -EINVAL;
+
+ 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;
+
+ /* This attribute shall be visible for SATA devices only */
+ if (WARN_ON_ONCE(!dev_is_sata(ddev)))
+ return -EINVAL;
+
+ 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);
diff --git a/include/scsi/sas_ata.h b/include/scsi/sas_ata.h
index 2f8c719840a6..cded782fdf33 100644
--- a/include/scsi/sas_ata.h
+++ b/include/scsi/sas_ata.h
@@ -39,6 +39,8 @@ 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 +125,10 @@ static inline int sas_ata_add_dev(struct domain_device *parent, struct ex_phy *p
sas_ata_disabled_notice();
return -ENODEV;
}
+
+static const struct attribute_group sas_ata_sdev_attr_group = {
+ .attrs = NULL,
+};
#endif
#endif /* _SAS_ATA_H_ */
--
2.44.0.278.ge034bb2e1d-goog
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