diff options
Diffstat (limited to 'include/drm/drm_gem.h')
| -rw-r--r-- | include/drm/drm_gem.h | 110 |
1 files changed, 94 insertions, 16 deletions
diff --git a/include/drm/drm_gem.h b/include/drm/drm_gem.h index 449a41b56ffc..663d80358057 100644 --- a/include/drm/drm_gem.h +++ b/include/drm/drm_gem.h @@ -34,6 +34,10 @@ * OTHER DEALINGS IN THE SOFTWARE. */ +#include <linux/kref.h> + +#include <drm/drm_vma_manager.h> + /** * struct drm_gem_object - GEM buffer object * @@ -48,9 +52,9 @@ struct drm_gem_object { * * Reference count of this object * - * Please use drm_gem_object_reference() to acquire and - * drm_gem_object_unreference() or drm_gem_object_unreference_unlocked() - * to release a reference to a GEM buffer object. + * Please use drm_gem_object_get() to acquire and drm_gem_object_put() + * or drm_gem_object_put_unlocked() to release a reference to a GEM + * buffer object. */ struct kref refcount; @@ -174,6 +178,32 @@ struct drm_gem_object { struct dma_buf_attachment *import_attach; }; +/** + * DEFINE_DRM_GEM_FOPS() - macro to generate file operations for GEM drivers + * @name: name for the generated structure + * + * This macro autogenerates a suitable &struct file_operations for GEM based + * drivers, which can be assigned to &drm_driver.fops. Note that this structure + * cannot be shared between drivers, because it contains a reference to the + * current module using THIS_MODULE. + * + * Note that the declaration is already marked as static - if you need a + * non-static version of this you're probably doing it wrong and will break the + * THIS_MODULE reference by accident. + */ +#define DEFINE_DRM_GEM_FOPS(name) \ + static const struct file_operations name = {\ + .owner = THIS_MODULE,\ + .open = drm_open,\ + .release = drm_release,\ + .unlocked_ioctl = drm_ioctl,\ + .compat_ioctl = drm_compat_ioctl,\ + .poll = drm_poll,\ + .read = drm_read,\ + .llseek = noop_llseek,\ + .mmap = drm_gem_mmap,\ + } + void drm_gem_object_release(struct drm_gem_object *obj); void drm_gem_object_free(struct kref *kref); int drm_gem_object_init(struct drm_device *dev, @@ -187,42 +217,90 @@ int drm_gem_mmap_obj(struct drm_gem_object *obj, unsigned long obj_size, int drm_gem_mmap(struct file *filp, struct vm_area_struct *vma); /** - * drm_gem_object_reference - acquire a GEM BO reference + * drm_gem_object_get - acquire a GEM buffer object reference * @obj: GEM buffer object * - * This acquires additional reference to @obj. It is illegal to call this - * without already holding a reference. No locks required. + * This function acquires an additional reference to @obj. It is illegal to + * call this without already holding a reference. No locks required. */ -static inline void -drm_gem_object_reference(struct drm_gem_object *obj) +static inline void drm_gem_object_get(struct drm_gem_object *obj) { kref_get(&obj->refcount); } /** - * __drm_gem_object_unreference - raw function to release a GEM BO reference + * __drm_gem_object_put - raw function to release a GEM buffer object reference * @obj: GEM buffer object * * This function is meant to be used by drivers which are not encumbered with * &drm_device.struct_mutex legacy locking and which are using the * gem_free_object_unlocked callback. It avoids all the locking checks and - * locking overhead of drm_gem_object_unreference() and - * drm_gem_object_unreference_unlocked(). + * locking overhead of drm_gem_object_put() and drm_gem_object_put_unlocked(). * * Drivers should never call this directly in their code. Instead they should - * wrap it up into a ``driver_gem_object_unreference(struct driver_gem_object - * *obj)`` wrapper function, and use that. Shared code should never call this, to + * wrap it up into a ``driver_gem_object_put(struct driver_gem_object *obj)`` + * wrapper function, and use that. Shared code should never call this, to * avoid breaking drivers by accident which still depend upon * &drm_device.struct_mutex locking. */ static inline void -__drm_gem_object_unreference(struct drm_gem_object *obj) +__drm_gem_object_put(struct drm_gem_object *obj) { kref_put(&obj->refcount, drm_gem_object_free); } -void drm_gem_object_unreference_unlocked(struct drm_gem_object *obj); -void drm_gem_object_unreference(struct drm_gem_object *obj); +void drm_gem_object_put_unlocked(struct drm_gem_object *obj); +void drm_gem_object_put(struct drm_gem_object *obj); + +/** + * drm_gem_object_reference - acquire a GEM buffer object reference + * @obj: GEM buffer object + * + * This is a compatibility alias for drm_gem_object_get() and should not be + * used by new code. + */ +static inline void drm_gem_object_reference(struct drm_gem_object *obj) +{ + drm_gem_object_get(obj); +} + +/** + * __drm_gem_object_unreference - raw function to release a GEM buffer object + * reference + * @obj: GEM buffer object + * + * This is a compatibility alias for __drm_gem_object_put() and should not be + * used by new code. + */ +static inline void __drm_gem_object_unreference(struct drm_gem_object *obj) +{ + __drm_gem_object_put(obj); +} + +/** + * drm_gem_object_unreference_unlocked - release a GEM buffer object reference + * @obj: GEM buffer object + * + * This is a compatibility alias for drm_gem_object_put_unlocked() and should + * not be used by new code. + */ +static inline void +drm_gem_object_unreference_unlocked(struct drm_gem_object *obj) +{ + drm_gem_object_put_unlocked(obj); +} + +/** + * drm_gem_object_unreference - release a GEM buffer object reference + * @obj: GEM buffer object + * + * This is a compatibility alias for drm_gem_object_put() and should not be + * used by new code. + */ +static inline void drm_gem_object_unreference(struct drm_gem_object *obj) +{ + drm_gem_object_put(obj); +} int drm_gem_handle_create(struct drm_file *file_priv, struct drm_gem_object *obj, |