diff options
Diffstat (limited to 'drivers/dma/idxd/sysfs.c')
-rw-r--r-- | drivers/dma/idxd/sysfs.c | 57 |
1 files changed, 55 insertions, 2 deletions
diff --git a/drivers/dma/idxd/sysfs.c b/drivers/dma/idxd/sysfs.c index 465d2e7627e4..293739ac5596 100644 --- a/drivers/dma/idxd/sysfs.c +++ b/drivers/dma/idxd/sysfs.c @@ -822,10 +822,14 @@ static ssize_t wq_block_on_fault_store(struct device *dev, if (rc < 0) return rc; - if (bof) + if (bof) { + if (test_bit(WQ_FLAG_PRS_DISABLE, &wq->flags)) + return -EOPNOTSUPP; + set_bit(WQ_FLAG_BLOCK_ON_FAULT, &wq->flags); - else + } else { clear_bit(WQ_FLAG_BLOCK_ON_FAULT, &wq->flags); + } return count; } @@ -1109,6 +1113,44 @@ static ssize_t wq_ats_disable_store(struct device *dev, struct device_attribute static struct device_attribute dev_attr_wq_ats_disable = __ATTR(ats_disable, 0644, wq_ats_disable_show, wq_ats_disable_store); +static ssize_t wq_prs_disable_show(struct device *dev, struct device_attribute *attr, char *buf) +{ + struct idxd_wq *wq = confdev_to_wq(dev); + + return sysfs_emit(buf, "%u\n", test_bit(WQ_FLAG_PRS_DISABLE, &wq->flags)); +} + +static ssize_t wq_prs_disable_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct idxd_wq *wq = confdev_to_wq(dev); + struct idxd_device *idxd = wq->idxd; + bool prs_dis; + int rc; + + if (wq->state != IDXD_WQ_DISABLED) + return -EPERM; + + if (!idxd->hw.wq_cap.wq_prs_support) + return -EOPNOTSUPP; + + rc = kstrtobool(buf, &prs_dis); + if (rc < 0) + return rc; + + if (prs_dis) { + set_bit(WQ_FLAG_PRS_DISABLE, &wq->flags); + /* when PRS is disabled, BOF needs to be off as well */ + clear_bit(WQ_FLAG_BLOCK_ON_FAULT, &wq->flags); + } else { + clear_bit(WQ_FLAG_PRS_DISABLE, &wq->flags); + } + return count; +} + +static struct device_attribute dev_attr_wq_prs_disable = + __ATTR(prs_disable, 0644, wq_prs_disable_show, wq_prs_disable_store); + static ssize_t wq_occupancy_show(struct device *dev, struct device_attribute *attr, char *buf) { struct idxd_wq *wq = confdev_to_wq(dev); @@ -1239,6 +1281,7 @@ static struct attribute *idxd_wq_attributes[] = { &dev_attr_wq_max_transfer_size.attr, &dev_attr_wq_max_batch_size.attr, &dev_attr_wq_ats_disable.attr, + &dev_attr_wq_prs_disable.attr, &dev_attr_wq_occupancy.attr, &dev_attr_wq_enqcmds_retries.attr, &dev_attr_wq_op_config.attr, @@ -1260,6 +1303,13 @@ static bool idxd_wq_attr_max_batch_size_invisible(struct attribute *attr, idxd->data->type == IDXD_TYPE_IAX; } +static bool idxd_wq_attr_wq_prs_disable_invisible(struct attribute *attr, + struct idxd_device *idxd) +{ + return attr == &dev_attr_wq_prs_disable.attr && + !idxd->hw.wq_cap.wq_prs_support; +} + static umode_t idxd_wq_attr_visible(struct kobject *kobj, struct attribute *attr, int n) { @@ -1273,6 +1323,9 @@ static umode_t idxd_wq_attr_visible(struct kobject *kobj, if (idxd_wq_attr_max_batch_size_invisible(attr, idxd)) return 0; + if (idxd_wq_attr_wq_prs_disable_invisible(attr, idxd)) + return 0; + return attr->mode; } |