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Bottomley" , "Martin K. Petersen" , Jack Wang , Hannes Reinecke , Xiang Chen , Artur Paszkiewicz , Bart Van Assche Cc: TJ Adams , linux-ide@vger.kernel.org, linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org, Igor Pylypiv Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Export libata NCQ Priority configuration helpers to be reused for libsas managed SATA devices. Acked-by: Damien Le Moal Reviewed-by: Jason Yan Signed-off-by: Igor Pylypiv Reviewed-by: Hannes Reinecke --- drivers/ata/libata-sata.c | 140 +++++++++++++++++++++++++++----------- include/linux/libata.h | 6 ++ 2 files changed, 107 insertions(+), 39 deletions(-) diff --git a/drivers/ata/libata-sata.c b/drivers/ata/libata-sata.c index 0fb1934875f2..f00dd02dc6f8 100644 --- a/drivers/ata/libata-sata.c +++ b/drivers/ata/libata-sata.c @@ -848,80 +848,122 @@ DEVICE_ATTR(link_power_management_policy, S_IRUGO | = S_IWUSR, ata_scsi_lpm_show, ata_scsi_lpm_store); EXPORT_SYMBOL_GPL(dev_attr_link_power_management_policy); =20 -static ssize_t ata_ncq_prio_supported_show(struct device *device, - struct device_attribute *attr, - char *buf) +/** + * ata_ncq_prio_supported - Check if device supports NCQ Priority + * @ap: ATA port of the target device + * @sdev: SCSI device + * @supported: Address of a boolean to store the result + * + * Helper to check if device supports NCQ Priority feature. + */ +int ata_ncq_prio_supported(struct ata_port *ap, struct scsi_device *sdev, + bool *supported) { - struct scsi_device *sdev =3D to_scsi_device(device); - struct ata_port *ap =3D ata_shost_to_port(sdev->host); struct ata_device *dev; - bool ncq_prio_supported; + unsigned long flags; int rc =3D 0; =20 - spin_lock_irq(ap->lock); + spin_lock_irqsave(ap->lock, flags); dev =3D ata_scsi_find_dev(ap, sdev); if (!dev) rc =3D -ENODEV; else - ncq_prio_supported =3D dev->flags & ATA_DFLAG_NCQ_PRIO; - spin_unlock_irq(ap->lock); + *supported =3D dev->flags & ATA_DFLAG_NCQ_PRIO; + spin_unlock_irqrestore(ap->lock, flags); + return rc; +} +EXPORT_SYMBOL_GPL(ata_ncq_prio_supported); + +static ssize_t ata_ncq_prio_supported_show(struct device *device, + struct device_attribute *attr, + char *buf) +{ + struct scsi_device *sdev =3D to_scsi_device(device); + struct ata_port *ap =3D ata_shost_to_port(sdev->host); + bool supported; + int rc; =20 - return rc ? rc : sysfs_emit(buf, "%u\n", ncq_prio_supported); + rc =3D ata_ncq_prio_supported(ap, sdev, &supported); + if (rc) + return rc; + + return sysfs_emit(buf, "%d\n", supported); } =20 DEVICE_ATTR(ncq_prio_supported, S_IRUGO, ata_ncq_prio_supported_show, NULL= ); EXPORT_SYMBOL_GPL(dev_attr_ncq_prio_supported); =20 -static ssize_t ata_ncq_prio_enable_show(struct device *device, - struct device_attribute *attr, - char *buf) +/** + * ata_ncq_prio_enabled - Check if NCQ Priority is enabled + * @ap: ATA port of the target device + * @sdev: SCSI device + * @enabled: Address of a boolean to store the result + * + * Helper to check if NCQ Priority feature is enabled. + */ +int ata_ncq_prio_enabled(struct ata_port *ap, struct scsi_device *sdev, + bool *enabled) { - struct scsi_device *sdev =3D to_scsi_device(device); - struct ata_port *ap =3D ata_shost_to_port(sdev->host); struct ata_device *dev; - bool ncq_prio_enable; + unsigned long flags; int rc =3D 0; =20 - spin_lock_irq(ap->lock); + spin_lock_irqsave(ap->lock, flags); dev =3D ata_scsi_find_dev(ap, sdev); if (!dev) rc =3D -ENODEV; else - ncq_prio_enable =3D dev->flags & ATA_DFLAG_NCQ_PRIO_ENABLED; - spin_unlock_irq(ap->lock); - - return rc ? rc : sysfs_emit(buf, "%u\n", ncq_prio_enable); + *enabled =3D dev->flags & ATA_DFLAG_NCQ_PRIO_ENABLED; + spin_unlock_irqrestore(ap->lock, flags); + return rc; } +EXPORT_SYMBOL_GPL(ata_ncq_prio_enabled); =20 -static ssize_t ata_ncq_prio_enable_store(struct device *device, - struct device_attribute *attr, - const char *buf, size_t len) +static ssize_t ata_ncq_prio_enable_show(struct device *device, + struct device_attribute *attr, + char *buf) { struct scsi_device *sdev =3D to_scsi_device(device); - struct ata_port *ap; - struct ata_device *dev; - long int input; - int rc =3D 0; + struct ata_port *ap =3D ata_shost_to_port(sdev->host); + bool enabled; + int rc; =20 - rc =3D kstrtol(buf, 10, &input); + rc =3D ata_ncq_prio_enabled(ap, sdev, &enabled); if (rc) return rc; - if ((input < 0) || (input > 1)) - return -EINVAL; =20 - ap =3D ata_shost_to_port(sdev->host); - dev =3D ata_scsi_find_dev(ap, sdev); - if (unlikely(!dev)) - return -ENODEV; + return sysfs_emit(buf, "%d\n", enabled); +} + +/** + * ata_ncq_prio_enable - Enable/disable NCQ Priority + * @ap: ATA port of the target device + * @sdev: SCSI device + * @enable: true - enable NCQ Priority, false - disable NCQ Priority + * + * Helper to enable/disable NCQ Priority feature. + */ +int ata_ncq_prio_enable(struct ata_port *ap, struct scsi_device *sdev, + bool enable) +{ + struct ata_device *dev; + unsigned long flags; + int rc =3D 0; + + spin_lock_irqsave(ap->lock, flags); =20 - spin_lock_irq(ap->lock); + dev =3D ata_scsi_find_dev(ap, sdev); + if (!dev) { + rc =3D -ENODEV; + goto unlock; + } =20 if (!(dev->flags & ATA_DFLAG_NCQ_PRIO)) { rc =3D -EINVAL; goto unlock; } =20 - if (input) { + if (enable) { if (dev->flags & ATA_DFLAG_CDL_ENABLED) { ata_dev_err(dev, "CDL must be disabled to enable NCQ priority\n"); @@ -934,9 +976,29 @@ static ssize_t ata_ncq_prio_enable_store(struct device= *device, } =20 unlock: - spin_unlock_irq(ap->lock); + spin_unlock_irqrestore(ap->lock, flags); + return rc; +} +EXPORT_SYMBOL_GPL(ata_ncq_prio_enable); + +static ssize_t ata_ncq_prio_enable_store(struct device *device, + struct device_attribute *attr, + const char *buf, size_t len) +{ + struct scsi_device *sdev =3D to_scsi_device(device); + struct ata_port *ap =3D ata_shost_to_port(sdev->host); + bool enable; + int rc; + + rc =3D kstrtobool(buf, &enable); + if (rc) + return rc; + + rc =3D ata_ncq_prio_enable(ap, sdev, enable); + if (rc) + return rc; =20 - return rc ? rc : len; + return len; } =20 DEVICE_ATTR(ncq_prio_enable, S_IRUGO | S_IWUSR, diff --git a/include/linux/libata.h b/include/linux/libata.h index 26d68115afb8..6dd9a4f9ca7c 100644 --- a/include/linux/libata.h +++ b/include/linux/libata.h @@ -1157,6 +1157,12 @@ extern int ata_scsi_change_queue_depth(struct scsi_d= evice *sdev, int queue_depth); extern int ata_change_queue_depth(struct ata_port *ap, struct scsi_device = *sdev, int queue_depth); +extern int ata_ncq_prio_supported(struct ata_port *ap, struct scsi_device = *sdev, + bool *supported); +extern int ata_ncq_prio_enabled(struct ata_port *ap, struct scsi_device *s= dev, + bool *enabled); +extern int ata_ncq_prio_enable(struct ata_port *ap, struct scsi_device *sd= ev, + bool enable); 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_fa= iled_dev); extern void ata_scsi_port_error_handler(struct Scsi_Host *host, struct ata= _port *ap); --=20 2.44.0.278.ge034bb2e1d-goog