From 307d9075a02b696e817b775c565e45c4fa3c32f2 Mon Sep 17 00:00:00 2001 From: Adam Manzanares Date: Mon, 12 Dec 2016 16:31:40 -0800 Subject: scsi: mpt3sas: Recognize and act on iopriority info This patch adds support for request iopriority handling in the mpt3sas layer. This works only when a ATA device is behind the SATL. The ATA device also has to indicate that it supports command priorities in the identify information that is pulled from the SATL. Signed-off-by: Adam Manzanares Acked-by: Sreekanth Reddy Signed-off-by: Martin K. Petersen --- drivers/scsi/mpt3sas/mpt3sas_ctl.c | 43 ++++++++++++++++++++++++++++++++++++-- 1 file changed, 41 insertions(+), 2 deletions(-) (limited to 'drivers/scsi/mpt3sas/mpt3sas_ctl.c') diff --git a/drivers/scsi/mpt3sas/mpt3sas_ctl.c b/drivers/scsi/mpt3sas/mpt3sas_ctl.c index 050bd788ad02..95f0f24bac05 100644 --- a/drivers/scsi/mpt3sas/mpt3sas_ctl.c +++ b/drivers/scsi/mpt3sas/mpt3sas_ctl.c @@ -3325,8 +3325,6 @@ static DEVICE_ATTR(diag_trigger_mpi, S_IRUGO | S_IWUSR, /*********** diagnostic trigger suppport *** END ****************************/ - - /*****************************************/ struct device_attribute *mpt3sas_host_attrs[] = { @@ -3402,9 +3400,50 @@ _ctl_device_handle_show(struct device *dev, struct device_attribute *attr, } static DEVICE_ATTR(sas_device_handle, S_IRUGO, _ctl_device_handle_show, NULL); +/** + * _ctl_device_ncq_io_prio_show - send prioritized io commands to device + * @dev - pointer to embedded device + * @buf - the buffer returned + * + * A sysfs 'read/write' sdev attribute, only works with SATA + */ +static ssize_t +_ctl_device_ncq_prio_enable_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct scsi_device *sdev = to_scsi_device(dev); + struct MPT3SAS_DEVICE *sas_device_priv_data = sdev->hostdata; + + return snprintf(buf, PAGE_SIZE, "%d\n", + sas_device_priv_data->ncq_prio_enable); +} + +static ssize_t +_ctl_device_ncq_prio_enable_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct scsi_device *sdev = to_scsi_device(dev); + struct MPT3SAS_DEVICE *sas_device_priv_data = sdev->hostdata; + bool ncq_prio_enable = 0; + + if (kstrtobool(buf, &ncq_prio_enable)) + return -EINVAL; + + if (!scsih_ncq_prio_supp(sdev)) + return -EINVAL; + + sas_device_priv_data->ncq_prio_enable = ncq_prio_enable; + return strlen(buf); +} +static DEVICE_ATTR(sas_ncq_prio_enable, S_IRUGO | S_IWUSR, + _ctl_device_ncq_prio_enable_show, + _ctl_device_ncq_prio_enable_store); + struct device_attribute *mpt3sas_dev_attrs[] = { &dev_attr_sas_address, &dev_attr_sas_device_handle, + &dev_attr_sas_ncq_prio_enable, NULL, }; -- cgit v1.2.3