path: root/drivers/gpu/drm/radeon/radeon_ttm.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/dma-mapping.h>
#include <linux/pagemap.h>
#include <linux/pci.h>
#include <linux/seq_file.h>
#include <linux/slab.h>
#include <linux/swap.h>
#include <linux/swiotlb.h>

#include <drm/drm_agpsupport.h>
#include <drm/drm_debugfs.h>
#include <drm/drm_device.h>
#include <drm/drm_file.h>
#include <drm/drm_prime.h>
#include <drm/radeon_drm.h>
#include <drm/ttm/ttm_bo_api.h>
#include <drm/ttm/ttm_bo_driver.h>
#include <drm/ttm/ttm_module.h>
#include <drm/ttm/ttm_page_alloc.h>
#include <drm/ttm/ttm_placement.h>

#include "radeon_reg.h"
#include "radeon.h"

static int radeon_ttm_debugfs_init(struct radeon_device *rdev);
static void radeon_ttm_debugfs_fini(struct radeon_device *rdev);

static int radeon_ttm_tt_bind(struct ttm_bo_device *bdev,
			      struct ttm_tt *ttm,
			      struct ttm_resource *bo_mem);

struct radeon_device *radeon_get_rdev(struct ttm_bo_device *bdev)
{
	struct radeon_mman *mman;
	struct radeon_device *rdev;

	mman = container_of(bdev, struct radeon_mman, bdev);
	rdev = container_of(mman, struct radeon_device, mman);
	return rdev;
}

static int radeon_ttm_init_vram(struct radeon_device *rdev)
{
	return ttm_range_man_init(&rdev->mman.bdev, TTM_PL_VRAM,
				  false, rdev->mc.real_vram_size >> PAGE_SHIFT);
}

static int radeon_ttm_init_gtt(struct radeon_device *rdev)
{
	return ttm_range_man_init(&rdev->mman.bdev, TTM_PL_TT,
				  true, rdev->mc.gtt_size >> PAGE_SHIFT);
}

static void radeon_evict_flags(struct ttm_buffer_object *bo,
				struct ttm_placement *placement)
{
	static const struct ttm_place placements = {
		.fpfn = 0,
		.lpfn = 0,
		.mem_type = TTM_PL_SYSTEM,
		.flags = TTM_PL_MASK_CACHING
	};

	struct radeon_bo *rbo;

	if (!radeon_ttm_bo_is_radeon_bo(bo)) {
		placement->placement = &placements;
		placement->busy_placement = &placements;
		placement->num_placement = 1;
		placement->num_busy_placement = 1;
		return;
	}
	rbo = container_of(bo, struct radeon_bo, tbo);
	switch (bo->mem.mem_type) {
	case TTM_PL_VRAM:
		if (rbo->rdev->ring[radeon_copy_ring_index(rbo->rdev)].ready == false)
			radeon_ttm_placement_from_domain(rbo, RADEON_GEM_DOMAIN_CPU);
		else if (rbo->rdev->mc.visible_vram_size < rbo->rdev->mc.real_vram_size &&
			 bo->mem.start < (rbo->rdev->mc.visible_vram_size >> PAGE_SHIFT)) {
			unsigned fpfn = rbo->rdev->mc.visible_vram_size >> PAGE_SHIFT;
			int i;

			/* Try evicting to the CPU inaccessible part of VRAM
			 * first, but only set GTT as busy placement, so this
			 * BO will be evicted to GTT rather than causing other
			 * BOs to be evicted from VRAM
			 */
			radeon_ttm_placement_from_domain(rbo, RADEON_GEM_DOMAIN_VRAM |
							 RADEON_GEM_DOMAIN_GTT);
			rbo->placement.num_busy_placement = 0;
			for (i = 0; i < rbo->placement.num_placement; i++) {
				if (rbo->placements[i].mem_type == TTM_PL_VRAM) {
					if (rbo->placements[i].fpfn < fpfn)
						rbo->placements[i].fpfn = fpfn;
				} else {
					rbo->placement.busy_placement =
						&rbo->placements[i];
					rbo->placement.num_busy_placement = 1;
				}
			}
		} else
			radeon_ttm_placement_from_domain(rbo, RADEON_GEM_DOMAIN_GTT);
		break;
	case TTM_PL_TT:
	default:
		radeon_ttm_placement_from_domain(rbo, RADEON_GEM_DOMAIN_CPU);
	}
	*placement = rbo->placement;
}

static int radeon_verify_access(struct ttm_buffer_object *bo, struct file *filp)