linux/drivers/gpu/drm/ttm/ttm_device.c

/* SPDX-License-Identifier: GPL-2.0 OR MIT */

/*
 * Copyright (c) 2006-2009 VMware, Inc., Palo Alto, CA., USA
 * Copyright 2020 Advanced Micro Devices, Inc.
 *
 * 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, sublicense,
 * 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 above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * 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 NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) 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.
 *
 * Authors: Christian König
 */

#define pr_fmt(fmt) …

#include <linux/debugfs.h>
#include <linux/mm.h>

#include <drm/ttm/ttm_bo.h>
#include <drm/ttm/ttm_device.h>
#include <drm/ttm/ttm_tt.h>
#include <drm/ttm/ttm_placement.h>

#include "ttm_module.h"

/*
 * ttm_global_mutex - protecting the global state
 */
static DEFINE_MUTEX(ttm_global_mutex);
static unsigned ttm_glob_use_count;
struct ttm_global ttm_glob;
EXPORT_SYMBOL(…);

struct dentry *ttm_debugfs_root;

static void ttm_global_release(void)
{ … }

static int ttm_global_init(void)
{ … }

/*
 * A buffer object shrink method that tries to swap out the first
 * buffer object on the global::swap_lru list.
 */
int ttm_global_swapout(struct ttm_operation_ctx *ctx, gfp_t gfp_flags)
{ … }

int ttm_device_swapout(struct ttm_device *bdev, struct ttm_operation_ctx *ctx,
		       gfp_t gfp_flags)
{ … }
EXPORT_SYMBOL(…);

/**
 * ttm_device_init
 *
 * @bdev: A pointer to a struct ttm_device to initialize.
 * @funcs: Function table for the device.
 * @dev: The core kernel device pointer for DMA mappings and allocations.
 * @mapping: The address space to use for this bo.
 * @vma_manager: A pointer to a vma manager.
 * @use_dma_alloc: If coherent DMA allocation API should be used.
 * @use_dma32: If we should use GFP_DMA32 for device memory allocations.
 *
 * Initializes a struct ttm_device:
 * Returns:
 * !0: Failure.
 */
int ttm_device_init(struct ttm_device *bdev, const struct ttm_device_funcs *funcs,
		    struct device *dev, struct address_space *mapping,
		    struct drm_vma_offset_manager *vma_manager,
		    bool use_dma_alloc, bool use_dma32)
{ … }
EXPORT_SYMBOL(…);

void ttm_device_fini(struct ttm_device *bdev)
{ … }
EXPORT_SYMBOL(…);

static void ttm_device_clear_lru_dma_mappings(struct ttm_device *bdev,
					      struct list_head *list)
{ … }

void ttm_device_clear_dma_mappings(struct ttm_device *bdev)
{ … }
EXPORT_SYMBOL(…);