path: root/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c

/*
 * Copyright 2009 Jerome Glisse.
 * All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sub license, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
 * USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial portions
 * of the Software.
 *
 */
/*
 * Authors:
 *    Jerome Glisse <glisse@freedesktop.org>
 *    Thomas Hellstrom <thomas-at-tungstengraphics-dot-com>
 *    Dave Airlie
 */
#include <linux/list.h>
#include <linux/slab.h>

#include <drm/amdgpu_drm.h>
#include <drm/drm_cache.h>
#include "amdgpu.h"
#include "amdgpu_trace.h"
#include "amdgpu_amdkfd.h"

/**
 * DOC: amdgpu_object
 *
 * This defines the interfaces to operate on an &amdgpu_bo buffer object which
 * represents memory used by driver (VRAM, system memory, etc.). The driver
 * provides DRM/GEM APIs to userspace. DRM/GEM APIs then use these interfaces
 * to create/destroy/set buffer object which are then managed by the kernel TTM
 * memory manager.
 * The interfaces are also used internally by kernel clients, including gfx,
 * uvd, etc. for kernel managed allocations used by the GPU.
 *
 */

/**
 * amdgpu_bo_subtract_pin_size - Remove BO from pin_size accounting
 *
 * @bo: &amdgpu_bo buffer object
 *
 * This function is called when a BO stops being pinned, and updates the
 * &amdgpu_device pin_size values accordingly.
 */
static void amdgpu_bo_subtract_pin_size(struct amdgpu_bo *bo)
{
	struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);

	if (bo->tbo.mem.mem_type == TTM_PL_VRAM) {
		atomic64_sub(amdgpu_bo_size(bo), &adev->vram_pin_size);
		atomic64_sub(amdgpu_vram_mgr_bo_visible_size(bo),
			     &adev->visible_pin_size);
	} else if (bo->tbo.mem.mem_type == TTM_PL_TT) {
		atomic64_sub(amdgpu_bo_size(bo), &adev->gart_pin_size);
	}
}

static void amdgpu_bo_destroy(struct ttm_buffer_object *tbo)
{
	struct amdgpu_device *adev = amdgpu_ttm_adev(tbo->bdev);
	struct amdgpu_bo *bo = ttm_to_amdgpu_bo(tbo);

	if (bo->pin_count > 0)
		amdgpu_bo_subtract_pin_size(bo);

	if (bo->kfd_bo)
		amdgpu_amdkfd_unreserve_memory_limit(bo);

	amdgpu_bo_kunmap(bo);

	if (bo->gem_base.import_attach)
		drm_prime_gem_destroy(&bo->gem_base, bo->tbo.sg);
	drm_gem_object_release(