drivers/gpu/drm/xe/xe_sa.h

/* SPDX-License-Identifier: MIT */
/*
 * Copyright © 2022 Intel Corporation
 */
#ifndef _XE_SA_H_
#define _XE_SA_H_

#include <linux/sizes.h>
#include <linux/types.h>

#include "xe_bo.h"
#include "xe_sa_types.h"

struct dma_fence;
struct xe_tile;

#define XE_SA_BO_MANAGER_FLAG_SHADOW	BIT(0)
struct xe_sa_manager *__xe_sa_bo_manager_init(struct xe_tile *tile, u32 size,
					      u32 guard, u32 align, u32 flags);
struct drm_suballoc *__xe_sa_bo_new(struct xe_sa_manager *sa_manager, u32 size, gfp_t gfp);

static inline struct xe_sa_manager *xe_sa_bo_manager_init(struct xe_tile *tile, u32 size, u32 align)
{
	return __xe_sa_bo_manager_init(tile, size, SZ_4K, align, 0);
}

/**
 * xe_sa_bo_new() - Make a suballocation.
 * @sa_manager: the &xe_sa_manager
 * @size: number of bytes we want to suballocate
 *
 * Try to make a suballocation of size @size.
 *
 * Return: a &drm_suballoc, or an ERR_PTR.
 */
static inline struct drm_suballoc *xe_sa_bo_new(struct xe_sa_manager *sa_manager, u32 size)
{
	return __xe_sa_bo_new(sa_manager, size, GFP_KERNEL);
}

struct drm_suballoc *xe_sa_bo_alloc(gfp_t gfp);
int xe_sa_bo_init(struct xe_sa_manager *sa_manager, struct drm_suballoc *sa, size_t size);
void xe_sa_bo_flush_write(struct drm_suballoc *sa_bo);
void xe_sa_bo_sync_read(struct drm_suballoc *sa_bo);
void xe_sa_bo_free(struct drm_suballoc *sa_bo, struct dma_fence *fence);

static inline struct xe_sa_manager *
to_xe_sa_manager(struct drm_suballoc_manager *mng)
{
	return container_of(mng, struct xe_sa_manager, base);
}

/**
 * xe_sa_manager_gpu_addr - Retrieve GPU address of a back storage BO
 * within suballocator.
 * @sa_manager: the &xe_sa_manager struct instance
 * Return: GGTT address of the back storage BO.
 */
static inline u64 xe_sa_manager_gpu_addr(struct xe_sa_manager *sa_manager)
{
	return xe_bo_ggtt_addr(sa_manager->bo);
}

static inline u64 xe_sa_bo_gpu_addr(struct drm_suballoc *sa)
{
	return xe_sa_manager_gpu_addr(to_xe_sa_manager(sa->manager)) +
		drm_suballoc_soffset(sa);
}

static inline void *xe_sa_bo_cpu_addr(struct drm_suballoc *sa)
{
	return to_xe_sa_manager(sa->manager)->cpu_ptr +
		drm_suballoc_soffset(sa);
}

void xe_sa_bo_swap_shadow(struct xe_sa_manager *sa_manager);
void xe_sa_bo_sync_shadow(struct drm_suballoc *sa_bo);

/**
 * xe_sa_bo_swap_guard() - Retrieve the SA BO swap guard within sub-allocator.
 * @sa_manager: the &xe_sa_manager
 *
 * Return: Sub alloctor swap guard mutex.
 */
static inline struct mutex *xe_sa_bo_swap_guard(struct xe_sa_manager *sa_manager)
{
	return &sa_manager->swap_guard;
}

#endif