linux/drivers/misc/bcm-vk/bcm_vk_sg.h

/* SPDX-License-Identifier: GPL-2.0 */
/*
 * Copyright 2018-2020 Broadcom.
 */

#ifndef BCM_VK_SG_H
#define BCM_VK_SG_H

#include <linux/dma-mapping.h>

struct bcm_vk_dma { … };

struct _vk_data { … } __packed;

/*
 * Scatter-gather DMA buffer API.
 *
 * These functions provide a simple way to create a page list and a
 * scatter-gather list from userspace address and map the memory
 * for DMA operation.
 */
int bcm_vk_sg_alloc(struct device *dev,
		    struct bcm_vk_dma *dma,
		    int dir,
		    struct _vk_data *vkdata,
		    int num);

int bcm_vk_sg_free(struct device *dev, struct bcm_vk_dma *dma, int num,
		   int *proc_cnt);

#endif