drm: Export drm_dev_init() for subclassing
In order to allow drivers to pack their privates and drm_device into one struct (e.g. for subclassing), export the initialisation routines for struct drm_device. v2: Missed return ret. That error path had only one job to do! v3: Cross-referencing drm_dev_init/drm_dev_alloc in kerneldoc, fix missed error code for goto err_minors. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Dave Airlie <airlied@redhat.com> Cc: Daniel Vetter <daniel.vetter@ffwll.ch> Cc: dri-devel@lists.freedesktop.org Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: http://patchwork.freedesktop.org/patch/msgid/1465993109-19523-2-git-send-email-chris@chris-wilson.co.uk
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@ -441,11 +441,12 @@ static void drm_fs_inode_free(struct inode *inode)
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}
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/**
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* drm_dev_alloc - Allocate new DRM device
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* @driver: DRM driver to allocate device for
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* drm_dev_init - Initialise new DRM device
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* @dev: DRM device
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* @driver: DRM driver
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* @parent: Parent device object
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*
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* Allocate and initialize a new DRM device. No device registration is done.
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* Initialize a new DRM device. No device registration is done.
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* Call drm_dev_register() to advertice the device to user space and register it
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* with other core subsystems. This should be done last in the device
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* initialization sequence to make sure userspace can't access an inconsistent
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@ -456,19 +457,18 @@ static void drm_fs_inode_free(struct inode *inode)
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*
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* Note that for purely virtual devices @parent can be NULL.
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*
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* Drivers that do not want to allocate their own device struct
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* embedding struct &drm_device can call drm_dev_alloc() instead.
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*
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* RETURNS:
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* Pointer to new DRM device, or NULL if out of memory.
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* 0 on success, or error code on failure.
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*/
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struct drm_device *drm_dev_alloc(struct drm_driver *driver,
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int drm_dev_init(struct drm_device *dev,
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struct drm_driver *driver,
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struct device *parent)
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{
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struct drm_device *dev;
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int ret;
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dev = kzalloc(sizeof(*dev), GFP_KERNEL);
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if (!dev)
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return NULL;
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kref_init(&dev->ref);
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dev->dev = parent;
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dev->driver = driver;
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@ -509,7 +509,8 @@ struct drm_device *drm_dev_alloc(struct drm_driver *driver,
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if (ret)
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goto err_minors;
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if (drm_ht_create(&dev->map_hash, 12))
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ret = drm_ht_create(&dev->map_hash, 12);
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if (ret)
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goto err_minors;
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drm_legacy_ctxbitmap_init(dev);
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@ -528,7 +529,7 @@ struct drm_device *drm_dev_alloc(struct drm_driver *driver,
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goto err_setunique;
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}
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return dev;
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return 0;
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err_setunique:
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if (drm_core_check_feature(dev, DRIVER_GEM))
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@ -543,8 +544,49 @@ err_minors:
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drm_fs_inode_free(dev->anon_inode);
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err_free:
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mutex_destroy(&dev->master_mutex);
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return ret;
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}
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EXPORT_SYMBOL(drm_dev_init);
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/**
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* drm_dev_alloc - Allocate new DRM device
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* @driver: DRM driver to allocate device for
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* @parent: Parent device object
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*
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* Allocate and initialize a new DRM device. No device registration is done.
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* Call drm_dev_register() to advertice the device to user space and register it
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* with other core subsystems. This should be done last in the device
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* initialization sequence to make sure userspace can't access an inconsistent
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* state.
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*
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* The initial ref-count of the object is 1. Use drm_dev_ref() and
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* drm_dev_unref() to take and drop further ref-counts.
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*
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* Note that for purely virtual devices @parent can be NULL.
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*
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* Drivers that wish to subclass or embed struct &drm_device into their
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* own struct should look at using drm_dev_init() instead.
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*
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* RETURNS:
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* Pointer to new DRM device, or NULL if out of memory.
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*/
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struct drm_device *drm_dev_alloc(struct drm_driver *driver,
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struct device *parent)
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{
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struct drm_device *dev;
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int ret;
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dev = kzalloc(sizeof(*dev), GFP_KERNEL);
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if (!dev)
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return NULL;
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ret = drm_dev_init(dev, driver, parent);
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if (ret) {
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kfree(dev);
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return NULL;
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}
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return dev;
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}
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EXPORT_SYMBOL(drm_dev_alloc);
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@ -1072,6 +1072,9 @@ extern void drm_sysfs_hotplug_event(struct drm_device *dev);
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struct drm_device *drm_dev_alloc(struct drm_driver *driver,
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struct device *parent);
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int drm_dev_init(struct drm_device *dev,
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struct drm_driver *driver,
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struct device *parent);
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void drm_dev_ref(struct drm_device *dev);
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void drm_dev_unref(struct drm_device *dev);
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int drm_dev_register(struct drm_device *dev, unsigned long flags);
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