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 <linux/dma-buf.h>

#include <drm/drm_drv.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.
 *
 */

static void amdgpu_bo_destroy(struct ttm_buffer_object *tbo)
{
	struct amdgpu_bo *bo = ttm_to_amdgpu_bo(tbo);

	amdgpu_bo_kunmap(bo);

	if (bo->tbo.base.import_attach)
		drm_prime_gem_destroy(&bo->tbo.base, bo->tbo.sg);
	drm_gem_object_release(&bo->tbo.base);
	amdgpu_bo_unref(&bo->parent);
	kvfree(bo);
}

static void amdgpu_bo_user_destroy(struct ttm_buffer_object *tbo)
{
	struct amdgpu_bo *bo = ttm_to_amdgpu_bo(tbo);
	struct amdgpu_bo_user *ubo;

	ubo = to_amdgpu_bo_user(bo);
	kfree(ubo->metadata);
	amdgpu_bo_destroy(tbo);
}

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

	vmbo = to_amdgpu_bo_vm(bo);
	/* in case amdgpu_device_recover_vram got NULL of bo->parent */
	if (!list_empty(&vmbo->shadow_list)) {
		mutex_lock(&adev->shadow_list_lock);
		list_del_init(&vmbo->shadow_list);
		mutex_unlock(&adev->shadow_list_lock);
	}

	amdgpu_bo_destroy(tbo);
}

/**
 * amdgpu_bo_is_amdgpu_bo - check if the buffer object is an &amdgpu_bo
 * @bo: buffer object to be checked
 *
 * Uses destroy function associated with the object to determine if this is
 * an &amdgpu_bo.
 *
 * Returns:
 * true if the object belongs to &amdgpu_bo, false if not.
 */
bool amdgpu_bo_is_amdgpu_bo(struct ttm_buffer_object *bo)
{
	if (bo->destroy == &amdgpu_bo_destroy ||
	    bo->destroy == &amdgpu_bo_user_destroy ||
	    bo->destroy == &amdgpu_bo_vm_destroy)
		return true;

	return false;
}

/**
 * amdgpu_bo_placement_from_domain - set buffer's placement
 * @abo: &amdgpu_bo buffer object whose placement is to be set
 * @domain: requested domain
 *
 * Sets buffer's placement according to requested domain and the buffer's
 * flags.
 */
void amdgpu_bo_placement_from_domain(struct amdgpu_bo *abo, u32 domain)
{
	struct amdgpu_device *adev = amdgpu_ttm_adev(abo->tbo.bdev);
	struct ttm_placement *placement = &abo->placement;
	struct ttm_place *places = abo->placements;
	u64 flags = abo->flags;
	u32 c = 0;

	if (domain & AMDGPU_GEM_DOMAIN_VRAM) {
		unsigned visible_pfn = adev->gmc.visible_vram_size >> PAGE_SHIFT;

		places[c].fpfn = 0;
		places[c].lpfn = 0;
		places[c].mem_type = TTM_PL_VRAM;
		places[c].flags = 0;

		if (flags & AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED)
			places[c].lpfn = visible_pfn;
		else
			places[c].flags |= TTM_PL_FLAG_TOPDOWN;

		if (flags & AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS)
			places[c].flags |= TTM_PL_FLAG_CONTIGUOUS;
		c++;
	}

	if (domain & AMDGPU_GEM_DOMAIN_GTT) {
		places[c].fpfn