Add blob property create/destroy ioctl wrappers

v2: Use memclear to zero out structure.

Signed-off-by: Daniel Stone <daniels@collabora.com>
Reviewed-by: Rob Clark <robclark@freedesktop.org>

include/drm/drm.h

@@ -766,6 +766,8 @@ struct drm_prime_handle {
 #define DRM_IOCTL_MODE_OBJ_SETPROPERTY	DRM_IOWR(0xBA, struct drm_mode_obj_set_property)
 #define DRM_IOCTL_MODE_CURSOR2		DRM_IOWR(0xBB, struct drm_mode_cursor2)
 #define DRM_IOCTL_MODE_ATOMIC		DRM_IOWR(0xBC, struct drm_mode_atomic)
+#define DRM_IOCTL_MODE_CREATEPROPBLOB	DRM_IOWR(0xBD, struct drm_mode_create_blob)
+#define DRM_IOCTL_MODE_DESTROYPROPBLOB	DRM_IOWR(0xBE, struct drm_mode_destroy_blob)
 
 /**
  * Device specific ioctls should only be in their respective headers

include/drm/drm_mode.h

@@ -523,4 +523,25 @@ struct drm_mode_atomic {
 	__u64 user_data;
 };
 
+/**
+ * Create a new 'blob' data property, copying length bytes from data pointer,
+ * and returning new blob ID.
+ */
+struct drm_mode_create_blob {
+	/** Pointer to data to copy. */
+	__u64 data;
+	/** Length of data to copy. */
+	__u32 length;
+	/** Return: new property ID. */
+	__u32 blob_id;
+};
+
+/**
+ * Destroy a user-created blob property.
+ */
+struct drm_mode_destroy_blob {
+	__u32 blob_id;
+};
+
+
 #endif

xf86drmMode.c

@@ -1387,3 +1387,37 @@ out:
 
 	return ret;
 }
+
+int
+drmModeCreatePropertyBlob(int fd, const void *data, size_t length, uint32_t *id)
+{
+	struct drm_mode_create_blob create;
+	int ret;
+
+	if (length >= 0xffffffff)
+		return -ERANGE;
+
+	memclear(create);
+
+	create.length = length;
+	create.data = (uintptr_t) data;
+	create.blob_id = 0;
+	*id = 0;
+
+	ret = DRM_IOCTL(fd, DRM_IOCTL_MODE_CREATEPROPBLOB, &create);
+	if (ret != 0)
+		return ret;
+
+	*id = create.blob_id;
+	return 0;
+}
+
+int
+drmModeDestroyPropertyBlob(int fd, uint32_t id)
+{
+	struct drm_mode_destroy_blob destroy;
+
+	memclear(destroy);
+	destroy.blob_id = id;
+	return DRM_IOCTL(fd, DRM_IOCTL_MODE_DESTROYPROPBLOB, &destroy);
+}

xf86drmMode.h

@@ -503,6 +503,11 @@ extern int drmModeAtomicCommit(int fd,
 			       uint32_t flags,
 			       void *user_data);
 
+extern int drmModeCreatePropertyBlob(int fd, const void *data, size_t size,
+				     uint32_t *id);
+extern int drmModeDestroyPropertyBlob(int fd, uint32_t id);
+
+
 #if defined(__cplusplus) || defined(c_plusplus)
 }
 #endif