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Commit 39a01d1f authored by Chris Wilson's avatar Chris Wilson
Browse files

drm/i915: Remove mmap_offset 



Since we rarely use the mmap_offset and it is easily computable from the
obj->map_list.hash, remove it.

Signed-off-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
parent 17250b71

drivers/gpu/drm/i915/i915_drv.h

+0 −5
Original line number Diff line number Diff line
@@ -796,11 +796,6 @@ struct drm_i915_gem_object { 
	/* Which ring is refering to is this object */

	struct intel_ring_buffer *ring;



	/**

	 * Fake offset for use by mmap(2)

	 */

	uint64_t mmap_offset;



	/** Breadcrumb of last rendering to the buffer. */

	uint32_t last_rendering_seqno;

drivers/gpu/drm/i915/i915_gem.c

+11 −35
Original line number Diff line number Diff line
@@ -1392,7 +1392,6 @@ i915_gem_create_mmap_offset(struct drm_gem_object *obj) 
{

	struct drm_device *dev = obj->dev;

	struct drm_gem_mm *mm = dev->mm_private;

	struct drm_i915_gem_object *obj_priv = to_intel_bo(obj);

	struct drm_map_list *list;

	struct drm_local_map *map;

	int ret = 0;
@@ -1431,16 +1430,13 @@ i915_gem_create_mmap_offset(struct drm_gem_object *obj) 
		goto out_free_mm;

	}



	/* By now we should be all set, any drm_mmap request on the offset

	 * below will get to our mmap & fault handler */

	obj_priv->mmap_offset = ((uint64_t) list->hash.key) << PAGE_SHIFT;



	return 0;



out_free_mm:

	drm_mm_put_block(list->file_offset_node);

out_free_list:

	kfree(list->map);

	list->map = NULL;



	return ret;

}
@@ -1466,9 +1462,10 @@ i915_gem_release_mmap(struct drm_gem_object *obj) 
	struct drm_i915_private *dev_priv = dev->dev_private;

	struct drm_i915_gem_object *obj_priv = to_intel_bo(obj);



	if (dev->dev_mapping)

	if (unlikely(obj->map_list.map && dev->dev_mapping))

		unmap_mapping_range(dev->dev_mapping,

				    obj_priv->mmap_offset, obj->size, 1);

				    (loff_t)obj->map_list.hash.key<<PAGE_SHIFT,

				    obj->size, 1);



	if (obj_priv->fault_mappable) {

		obj_priv->fault_mappable = false;
@@ -1480,26 +1477,15 @@ static void 
i915_gem_free_mmap_offset(struct drm_gem_object *obj)

{

	struct drm_device *dev = obj->dev;

	struct drm_i915_gem_object *obj_priv = to_intel_bo(obj);

	struct drm_gem_mm *mm = dev->mm_private;

	struct drm_map_list *list;

	struct drm_map_list *list = &obj->map_list;



	list = &obj->map_list;

	drm_ht_remove_item(&mm->offset_hash, &list->hash);



	if (list->file_offset_node) {

	drm_mm_put_block(list->file_offset_node);

		list->file_offset_node = NULL;

	}



	if (list->map) {

	kfree(list->map);

	list->map = NULL;

}



	obj_priv->mmap_offset = 0;

}



/**

 * i915_gem_get_gtt_alignment - return required GTT alignment for an object

 * @obj: object to check
@@ -1586,23 +1572,13 @@ i915_gem_mmap_gtt_ioctl(struct drm_device *dev, void *data, 
		goto out;

	}



	if (!obj_priv->mmap_offset) {

	if (!obj->map_list.map) {

		ret = i915_gem_create_mmap_offset(obj);

		if (ret)

			goto out;

	}



	args->offset = obj_priv->mmap_offset;



	/*

	 * Pull it into the GTT so that we have a page list (makes the

	 * initial fault faster and any subsequent flushing possible).

	 */

	if (!obj_priv->agp_mem) {

		ret = i915_gem_object_bind_to_gtt(obj, 0, true);

		if (ret)

			goto out;

	}

	args->offset = (u64)obj->map_list.hash.key << PAGE_SHIFT;



out:

	drm_gem_object_unreference(obj);
@@ -4477,7 +4453,7 @@ static void i915_gem_free_object_tail(struct drm_gem_object *obj) 
		return;

	}



	if (obj_priv->mmap_offset)

	if (obj->map_list.map)

		i915_gem_free_mmap_offset(obj);



	drm_gem_object_release(obj);