X-Git-Url: http://git.monstr.eu/?a=blobdiff_plain;f=drivers%2Fdma%2Fidxd%2Fsysfs.c;fp=drivers%2Fdma%2Fidxd%2Fsysfs.c;h=85644e5bde8398b1eb2cc2e6a23565b86cdc3f6f;hb=1649091f9180470f96f001724a4902d5d82bbd75;hp=2eba8cab25a1e93660311571642cecf3ae95281e;hpb=0c40bfb4c2dfad00a15337bb6213f92a797e3695;p=linux-2.6-microblaze.git

diff --git a/drivers/dma/idxd/sysfs.c b/drivers/dma/idxd/sysfs.c
index 2eba8cab25a1..85644e5bde83 100644
--- a/drivers/dma/idxd/sysfs.c
+++ b/drivers/dma/idxd/sysfs.c
@@ -1573,6 +1573,46 @@ static ssize_t iaa_cap_show(struct device *dev,
 }
 static DEVICE_ATTR_RO(iaa_cap);
 
+static ssize_t event_log_size_show(struct device *dev,
+				   struct device_attribute *attr, char *buf)
+{
+	struct idxd_device *idxd = confdev_to_idxd(dev);
+
+	if (!idxd->evl)
+		return -EOPNOTSUPP;
+
+	return sysfs_emit(buf, "%u\n", idxd->evl->size);
+}
+
+static ssize_t event_log_size_store(struct device *dev,
+				    struct device_attribute *attr,
+				    const char *buf, size_t count)
+{
+	struct idxd_device *idxd = confdev_to_idxd(dev);
+	unsigned long val;
+	int rc;
+
+	if (!idxd->evl)
+		return -EOPNOTSUPP;
+
+	rc = kstrtoul(buf, 10, &val);
+	if (rc < 0)
+		return -EINVAL;
+
+	if (idxd->state == IDXD_DEV_ENABLED)
+		return -EPERM;
+
+	if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))
+		return -EPERM;
+
+	if (val < IDXD_EVL_SIZE_MIN || val > IDXD_EVL_SIZE_MAX)
+		return -EINVAL;
+
+	idxd->evl->size = val;
+	return count;
+}
+static DEVICE_ATTR_RW(event_log_size);
+
 static bool idxd_device_attr_max_batch_size_invisible(struct attribute *attr,
 						      struct idxd_device *idxd)
 {
@@ -1603,6 +1643,13 @@ static bool idxd_device_attr_iaa_cap_invisible(struct attribute *attr,
 	       idxd->hw.version < DEVICE_VERSION_2);
 }
 
+static bool idxd_device_attr_event_log_size_invisible(struct attribute *attr,
+						      struct idxd_device *idxd)
+{
+	return (attr == &dev_attr_event_log_size.attr &&
+		!idxd->hw.gen_cap.evl_support);
+}
+
 static umode_t idxd_device_attr_visible(struct kobject *kobj,
 					struct attribute *attr, int n)
 {
@@ -1618,6 +1665,9 @@ static umode_t idxd_device_attr_visible(struct kobject *kobj,
 	if (idxd_device_attr_iaa_cap_invisible(attr, idxd))
 		return 0;
 
+	if (idxd_device_attr_event_log_size_invisible(attr, idxd))
+		return 0;
+
 	return attr->mode;
 }
 
@@ -1644,6 +1694,7 @@ static struct attribute *idxd_device_attributes[] = {
 	&dev_attr_cdev_major.attr,
 	&dev_attr_cmd_status.attr,
 	&dev_attr_iaa_cap.attr,
+	&dev_attr_event_log_size.attr,
 	NULL,
 };
 
@@ -1665,6 +1716,7 @@ static void idxd_conf_device_release(struct device *dev)
 	bitmap_free(idxd->wq_enable_map);
 	kfree(idxd->wqs);
 	kfree(idxd->engines);
+	kfree(idxd->evl);
 	ida_free(&idxd_ida, idxd->id);
 	bitmap_free(idxd->opcap_bmap);
 	kfree(idxd);