drm: add drm_dev_alloc() helper
Instead of managing device allocation+initialization in each bus-driver,
we should do that in a central place. drm_fill_in_dev() already does most
of it, but also requires the global drm lock for partial AGP device
registration.
Split both apart so we have a clean device initialization/allocation
phase, and a registration phase.
Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/drm_stub.c b/drivers/gpu/drm/drm_stub.c
index 39d8645..64bd52f 100644
--- a/drivers/gpu/drm/drm_stub.c
+++ b/drivers/gpu/drm/drm_stub.c
@@ -260,60 +260,15 @@
{
int retcode;
- INIT_LIST_HEAD(&dev->filelist);
- INIT_LIST_HEAD(&dev->ctxlist);
- INIT_LIST_HEAD(&dev->vmalist);
- INIT_LIST_HEAD(&dev->maplist);
- INIT_LIST_HEAD(&dev->vblank_event_list);
-
- spin_lock_init(&dev->count_lock);
- spin_lock_init(&dev->event_lock);
- mutex_init(&dev->struct_mutex);
- mutex_init(&dev->ctxlist_mutex);
-
- if (drm_ht_create(&dev->map_hash, 12)) {
- return -ENOMEM;
- }
-
- /* the DRM has 6 basic counters */
- dev->counters = 6;
- dev->types[0] = _DRM_STAT_LOCK;
- dev->types[1] = _DRM_STAT_OPENS;
- dev->types[2] = _DRM_STAT_CLOSES;
- dev->types[3] = _DRM_STAT_IOCTLS;
- dev->types[4] = _DRM_STAT_LOCKS;
- dev->types[5] = _DRM_STAT_UNLOCKS;
-
- dev->driver = driver;
-
if (dev->driver->bus->agp_init) {
retcode = dev->driver->bus->agp_init(dev);
- if (retcode)
- goto error_out_unreg;
- }
-
-
-
- retcode = drm_ctxbitmap_init(dev);
- if (retcode) {
- DRM_ERROR("Cannot allocate memory for context bitmap.\n");
- goto error_out_unreg;
- }
-
- if (driver->driver_features & DRIVER_GEM) {
- retcode = drm_gem_init(dev);
if (retcode) {
- DRM_ERROR("Cannot initialize graphics execution "
- "manager (GEM)\n");
- goto error_out_unreg;
+ drm_lastclose(dev);
+ return retcode;
}
}
return 0;
-
- error_out_unreg:
- drm_lastclose(dev);
- return retcode;
}
EXPORT_SYMBOL(drm_fill_in_dev);
@@ -490,3 +445,75 @@
mutex_unlock(&drm_global_mutex);
}
EXPORT_SYMBOL(drm_unplug_dev);
+
+/**
+ * drm_dev_alloc - Allocate new drm device
+ * @driver: DRM driver to allocate device for
+ * @parent: Parent device object
+ *
+ * Allocate and initialize a new DRM device. No device registration is done.
+ *
+ * RETURNS:
+ * Pointer to new DRM device, or NULL if out of memory.
+ */
+struct drm_device *drm_dev_alloc(struct drm_driver *driver,
+ struct device *parent)
+{
+ struct drm_device *dev;
+ int ret;
+
+ dev = kzalloc(sizeof(*dev), GFP_KERNEL);
+ if (!dev)
+ return NULL;
+
+ dev->dev = parent;
+ dev->driver = driver;
+
+ INIT_LIST_HEAD(&dev->filelist);
+ INIT_LIST_HEAD(&dev->ctxlist);
+ INIT_LIST_HEAD(&dev->vmalist);
+ INIT_LIST_HEAD(&dev->maplist);
+ INIT_LIST_HEAD(&dev->vblank_event_list);
+
+ spin_lock_init(&dev->count_lock);
+ spin_lock_init(&dev->event_lock);
+ mutex_init(&dev->struct_mutex);
+ mutex_init(&dev->ctxlist_mutex);
+
+ /* the DRM has 6 basic counters */
+ dev->counters = 6;
+ dev->types[0] = _DRM_STAT_LOCK;
+ dev->types[1] = _DRM_STAT_OPENS;
+ dev->types[2] = _DRM_STAT_CLOSES;
+ dev->types[3] = _DRM_STAT_IOCTLS;
+ dev->types[4] = _DRM_STAT_LOCKS;
+ dev->types[5] = _DRM_STAT_UNLOCKS;
+
+ if (drm_ht_create(&dev->map_hash, 12))
+ goto err_free;
+
+ ret = drm_ctxbitmap_init(dev);
+ if (ret) {
+ DRM_ERROR("Cannot allocate memory for context bitmap.\n");
+ goto err_ht;
+ }
+
+ if (driver->driver_features & DRIVER_GEM) {
+ ret = drm_gem_init(dev);
+ if (ret) {
+ DRM_ERROR("Cannot initialize graphics execution manager (GEM)\n");
+ goto err_ctxbitmap;
+ }
+ }
+
+ return dev;
+
+err_ctxbitmap:
+ drm_ctxbitmap_cleanup(dev);
+err_ht:
+ drm_ht_remove(&dev->map_hash);
+err_free:
+ kfree(dev);
+ return NULL;
+}
+EXPORT_SYMBOL(drm_dev_alloc);