diff options
Diffstat (limited to 'drivers/dma/idxd/sysfs.c')
| -rw-r--r-- | drivers/dma/idxd/sysfs.c | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/drivers/dma/idxd/sysfs.c b/drivers/dma/idxd/sysfs.c index dcba60953217..07a5db06a29a 100644 --- a/drivers/dma/idxd/sysfs.c +++ b/drivers/dma/idxd/sysfs.c @@ -1064,6 +1064,89 @@ static ssize_t wq_cdev_minor_show(struct device *dev, static struct device_attribute dev_attr_wq_cdev_minor = __ATTR(cdev_minor, 0444, wq_cdev_minor_show, NULL); +static int __get_sysfs_u64(const char *buf, u64 *val) +{ + int rc; + + rc = kstrtou64(buf, 0, val); + if (rc < 0) + return -EINVAL; + + if (*val == 0) + return -EINVAL; + + *val = roundup_pow_of_two(*val); + return 0; +} + +static ssize_t wq_max_transfer_size_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct idxd_wq *wq = container_of(dev, struct idxd_wq, conf_dev); + + return sprintf(buf, "%llu\n", wq->max_xfer_bytes); +} + +static ssize_t wq_max_transfer_size_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct idxd_wq *wq = container_of(dev, struct idxd_wq, conf_dev); + struct idxd_device *idxd = wq->idxd; + u64 xfer_size; + int rc; + + if (wq->state != IDXD_WQ_DISABLED) + return -EPERM; + + rc = __get_sysfs_u64(buf, &xfer_size); + if (rc < 0) + return rc; + + if (xfer_size > idxd->max_xfer_bytes) + return -EINVAL; + + wq->max_xfer_bytes = xfer_size; + + return count; +} + +static struct device_attribute dev_attr_wq_max_transfer_size = + __ATTR(max_transfer_size, 0644, + wq_max_transfer_size_show, wq_max_transfer_size_store); + +static ssize_t wq_max_batch_size_show(struct device *dev, struct device_attribute *attr, char *buf) +{ + struct idxd_wq *wq = container_of(dev, struct idxd_wq, conf_dev); + + return sprintf(buf, "%u\n", wq->max_batch_size); +} + +static ssize_t wq_max_batch_size_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct idxd_wq *wq = container_of(dev, struct idxd_wq, conf_dev); + struct idxd_device *idxd = wq->idxd; + u64 batch_size; + int rc; + + if (wq->state != IDXD_WQ_DISABLED) + return -EPERM; + + rc = __get_sysfs_u64(buf, &batch_size); + if (rc < 0) + return rc; + + if (batch_size > idxd->max_batch_size) + return -EINVAL; + + wq->max_batch_size = (u32)batch_size; + + return count; +} + +static struct device_attribute dev_attr_wq_max_batch_size = + __ATTR(max_batch_size, 0644, wq_max_batch_size_show, wq_max_batch_size_store); + static struct attribute *idxd_wq_attributes[] = { &dev_attr_wq_clients.attr, &dev_attr_wq_state.attr, @@ -1074,6 +1157,8 @@ static struct attribute *idxd_wq_attributes[] = { &dev_attr_wq_type.attr, &dev_attr_wq_name.attr, &dev_attr_wq_cdev_minor.attr, + &dev_attr_wq_max_transfer_size.attr, + &dev_attr_wq_max_batch_size.attr, NULL, }; @@ -1317,6 +1402,15 @@ static ssize_t cdev_major_show(struct device *dev, } static DEVICE_ATTR_RO(cdev_major); +static ssize_t cmd_status_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct idxd_device *idxd = container_of(dev, struct idxd_device, conf_dev); + + return sprintf(buf, "%#x\n", idxd->cmd_status); +} +static DEVICE_ATTR_RO(cmd_status); + static struct attribute *idxd_device_attributes[] = { &dev_attr_version.attr, &dev_attr_max_groups.attr, @@ -1335,6 +1429,7 @@ static struct attribute *idxd_device_attributes[] = { &dev_attr_max_tokens.attr, &dev_attr_token_limit.attr, &dev_attr_cdev_major.attr, + &dev_attr_cmd_status.attr, NULL, }; |