linux/include/drm/ttm/ttm_kmap_iter.h

/* SPDX-License-Identifier: MIT */
/*
 * Copyright © 2021 Intel Corporation
 */
#ifndef __TTM_KMAP_ITER_H__
#define __TTM_KMAP_ITER_H__

#include <linux/types.h>

struct ttm_kmap_iter;
struct iosys_map;

/**
 * struct ttm_kmap_iter_ops - Ops structure for a struct
 * ttm_kmap_iter.
 * @maps_tt: Whether the iterator maps TT memory directly, as opposed
 * mapping a TT through an aperture. Both these modes have
 * struct ttm_resource_manager::use_tt set, but the latter typically
 * returns is_iomem == true from ttm_mem_io_reserve.
 */
struct ttm_kmap_iter_ops { … };

/**
 * struct ttm_kmap_iter - Iterator for kmap_local type operations on a
 * resource.
 * @ops: Pointer to the operations struct.
 *
 * This struct is intended to be embedded in a resource-specific specialization
 * implementing operations for the resource.
 *
 * Nothing stops us from extending the operations to vmap, vmap_pfn etc,
 * replacing some or parts of the ttm_bo_util. cpu-map functionality.
 */
struct ttm_kmap_iter { … };

#endif /* __TTM_KMAP_ITER_H__ */