linux/drivers/gpu/drm/xe/xe_bo_evict.c

// SPDX-License-Identifier: MIT
/*
 * Copyright © 2022 Intel Corporation
 */

#include "xe_bo_evict.h"

#include "xe_bo.h"
#include "xe_device.h"
#include "xe_ggtt.h"
#include "xe_tile.h"

/**
 * xe_bo_evict_all - evict all BOs from VRAM
 *
 * @xe: xe device
 *
 * Evict non-pinned user BOs first (via GPU), evict pinned external BOs next
 * (via GPU), wait for evictions, and finally evict pinned kernel BOs via CPU.
 * All eviction magic done via TTM calls.
 *
 * Evict == move VRAM BOs to temporary (typically system) memory.
 *
 * This function should be called before the device goes into a suspend state
 * where the VRAM loses power.
 */
int xe_bo_evict_all(struct xe_device *xe)
{ … }

/**
 * xe_bo_restore_kernel - restore kernel BOs to VRAM
 *
 * @xe: xe device
 *
 * Move kernel BOs from temporary (typically system) memory to VRAM via CPU. All
 * moves done via TTM calls.
 *
 * This function should be called early, before trying to init the GT, on device
 * resume.
 */
int xe_bo_restore_kernel(struct xe_device *xe)
{ … }

/**
 * xe_bo_restore_user - restore pinned user BOs to VRAM
 *
 * @xe: xe device
 *
 * Move pinned user BOs from temporary (typically system) memory to VRAM via
 * CPU. All moves done via TTM calls.
 *
 * This function should be called late, after GT init, on device resume.
 */
int xe_bo_restore_user(struct xe_device *xe)
{ … }