static void drm_dev_release(struct kref *ref)
{
struct drm_device *dev = container_of(ref, struct drm_device, ref);
if (drm_core_check_feature(dev, DRIVER_GEM))
drm_gem_destroy(dev);
drm_legacy_ctxbitmap_cleanup(dev);
drm_ht_remove(&dev->map_hash);
drm_fs_inode_free(dev->anon_inode);
drm_minor_free(dev, DRM_MINOR_PRIMARY);
drm_minor_free(dev, DRM_MINOR_RENDER);
drm_minor_free(dev, DRM_MINOR_CONTROL);
mutex_destroy(&dev->master_mutex);
kfree(dev->unique);
kfree(dev);
}
/**
* drm_dev_init - Initialise new DRM device
* @dev: DRM device
* @driver: DRM driver
* @parent: Parent device object
*
* Initialize a new DRM device. No device registration is done.
* Call drm_dev_register() to advertice the device to user space and register it
* with other core subsystems. This should be done last in the device
* initialization sequence to make sure userspace can't access an inconsistent
* state.
*
* The initial ref-count of the object is 1. Use drm_dev_ref() and
* drm_dev_unref() to take and drop further ref-counts.
*
* Note that for purely virtual devices @parent can be NULL.
*
* Drivers that do not want to allocate their own device struct
* embedding struct &drm_device can call drm_dev_alloc() instead.
*
* RETURNS:
* 0 on success, or error code on failure.
*/
int drm_dev_init(struct drm_device *dev,
struct drm_driver *driver,
struct device *parent)
{
int ret;
kref_init(&dev->ref);
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->buf_lock);
spin_lock_init(&dev->event_lock);
mutex_init(&dev->struct_mutex);
mutex_init(&dev->filelist_mutex);
mutex_init(&dev->ctxlist_mutex);
mutex_init(&dev->master_mutex);
dev->anon_inode = drm_fs_inode_new();
if (IS_ERR(dev->anon_inode)) {
ret = PTR_ERR(dev->anon_inode);
DRM_ERROR("Cannot allocate anonymous inode: %d\n", ret);
goto err_free;
}
if (drm_core_check_feature(dev, DRIVER_MODESET)) {
ret = drm_minor_alloc(dev, DRM_MINOR_CONTROL);
if (ret)
goto err_minors;
}
if (drm_core_check_feature(dev, DRIVER_RENDER)) {
ret = drm_minor_alloc(dev, DRM_MINOR_RENDER);
if (ret)
goto err_minors;
}
ret = drm_minor_alloc(dev, DRM_MINOR_PRIMARY);
if (ret)
goto err_minors;
ret = drm_ht_create(&dev->map_hash, 12);
if (ret)
goto err_minors;
drm_legacy_ctxbitmap_init(dev);
if (drm_core_check_feature(dev, DRIVER_GEM)) {
ret = drm_gem_init(dev);
if (ret) {
DRM_ERROR("Cannot initialize graphics execution manager (GEM)\n");
goto err_ctxbitmap;
}
}
/* Use the parent device name as DRM device unique identifier, but fall
* back to the driver name for virtual devices like vgem. */
ret = drm_dev_set_unique(dev, parent ? dev_name(parent) : driver->name);
if (ret)
goto err_setunique;
return 0;
err_setunique:
if (drm_core_check_feature(dev, DRIVER_GEM))
drm_gem_destroy(dev);
err_ctxbitmap:
drm_legacy_ctxbitmap_cleanup(dev);
drm_ht_remove(&dev->map_hash);
err_minors:
drm_minor_free(dev, DRM_MINOR_PRIMARY);
drm_minor_free(dev, DRM_MINOR_RENDER);
drm_minor_free(dev, DRM_MINOR_CONTROL);
drm_fs_inode_free(dev->anon_inode);
err_free:
mutex_destroy(&dev->master_mutex);
return ret;
}
static void drm_unload(struct drm_device *dev)
{
int i;
DRM_DEBUG("\n");
drm_sysctl_cleanup(dev);
if (dev->devnode != NULL)
destroy_dev(dev->devnode);
drm_ctxbitmap_cleanup(dev);
if (dev->driver->driver_features & DRIVER_GEM)
drm_gem_destroy(dev);
if (dev->agp && dev->agp->agp_mtrr) {
int __unused retcode;
retcode = drm_mtrr_del(0, dev->agp->agp_info.ai_aperture_base,
dev->agp->agp_info.ai_aperture_size, DRM_MTRR_WC);
DRM_DEBUG("mtrr_del = %d", retcode);
}
drm_vblank_cleanup(dev);
DRM_LOCK(dev);
drm_lastclose(dev);
DRM_UNLOCK(dev);
/* Clean up PCI resources allocated by drm_bufs.c. We're not really
* worried about resource consumption while the DRM is inactive (between
* lastclose and firstopen or unload) because these aren't actually
* taking up KVA, just keeping the PCI resource allocated.
*/
for (i = 0; i < DRM_MAX_PCI_RESOURCE; i++) {
if (dev->pcir[i] == NULL)
continue;
bus_release_resource(dev->dev, SYS_RES_MEMORY,
dev->pcirid[i], dev->pcir[i]);
dev->pcir[i] = NULL;
}
if (dev->agp) {
drm_free(dev->agp, M_DRM);
dev->agp = NULL;
}
if (dev->driver->unload != NULL) {
DRM_LOCK(dev);
dev->driver->unload(dev);
DRM_UNLOCK(dev);
}
drm_mem_uninit();
if (pci_disable_busmaster(dev->dev))
DRM_ERROR("Request to disable bus-master failed.\n");
lockuninit(&dev->vbl_lock);
lockuninit(&dev->dev_lock);
lockuninit(&dev->event_lock);
lockuninit(&dev->struct_mutex);
}
