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authorGabriel Krisman Bertazi <krisman@collabora.co.uk>2017-01-02 15:20:08 +0100
committerDaniel Vetter <daniel.vetter@ffwll.ch>2017-01-04 09:55:57 +0100
commit569265002782503d40fb32a45a950f2ac42af353 (patch)
tree301602aca46c2c45078f5bef0d24cb88f75c5215 /include/drm/drm_drv.h
parentdrm: nouveau: fix build when LEDS_CLASS=m (diff)
downloadlinux-569265002782503d40fb32a45a950f2ac42af353.tar.xz
linux-569265002782503d40fb32a45a950f2ac42af353.zip
drm: Document deprecated load/unload hook
v2: - Replace discouraged with deprecated - Link to new initialization/teardown functions Signed-off-by: Gabriel Krisman Bertazi <krisman@collabora.co.uk> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: http://patchwork.freedesktop.org/patch/msgid/20170102142008.22174-3-krisman@collabora.co.uk
Diffstat (limited to 'include/drm/drm_drv.h')
-rw-r--r--include/drm/drm_drv.h35
1 files changed, 35 insertions, 0 deletions
diff --git a/include/drm/drm_drv.h b/include/drm/drm_drv.h
index c4fc49583dc0..9c2d9f0bb043 100644
--- a/include/drm/drm_drv.h
+++ b/include/drm/drm_drv.h
@@ -64,12 +64,47 @@ struct drm_mode_create_dumb;
* structure for GEM drivers.
*/
struct drm_driver {
+
+ /**
+ * @load:
+ *
+ * Backward-compatible driver callback to complete
+ * initialization steps after the driver is registered. For
+ * this reason, may suffer from race conditions and its use is
+ * deprecated for new drivers. It is therefore only supported
+ * for existing drivers not yet converted to the new scheme.
+ * See drm_dev_init() and drm_dev_register() for proper and
+ * race-free way to set up a &struct drm_device.
+ *
+ * Returns:
+ *
+ * Zero on success, non-zero value on failure.
+ */
int (*load) (struct drm_device *, unsigned long flags);
int (*firstopen) (struct drm_device *);
int (*open) (struct drm_device *, struct drm_file *);
void (*preclose) (struct drm_device *, struct drm_file *file_priv);
void (*postclose) (struct drm_device *, struct drm_file *);
void (*lastclose) (struct drm_device *);
+
+ /**
+ * @unload:
+ *
+ * Reverse the effects of the driver load callback. Ideally,
+ * the clean up performed by the driver should happen in the
+ * reverse order of the initialization. Similarly to the load
+ * hook, this handler is deprecated and its usage should be
+ * dropped in favor of an open-coded teardown function at the
+ * driver layer. See drm_dev_unregister() and drm_dev_unref()
+ * for the proper way to remove a &struct drm_device.
+ *
+ * The unload() hook is called right after unregistering
+ * the device.
+ *
+ * Returns:
+ *
+ * The return value is ignored.
+ */
int (*unload) (struct drm_device *);
int (*dma_ioctl) (struct drm_device *dev, void *data, struct drm_file *file_priv);
int (*dma_quiescent) (struct drm_device *);