xref: /openbmc/linux/drivers/staging/media/atomisp/include/hmm/hmm.h (revision 931d87d2)

/* SPDX-License-Identifier: GPL-2.0 */
/*
 * Support for Medifield PNW Camera Imaging ISP subsystem.
 *
 * Copyright (c) 2010 Intel Corporation. All Rights Reserved.
 *
 * Copyright (c) 2010 Silicon Hive www.siliconhive.com.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License version
 * 2 as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 *
 */

#ifndef	__HMM_H__
#define	__HMM_H__

#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/slab.h>
#include <linux/mm.h>

#include "hmm_common.h"
#include "hmm/hmm_bo.h"
#include "ia_css_types.h"

#define mmgr_NULL              ((ia_css_ptr)0)
#define mmgr_EXCEPTION         ((ia_css_ptr) - 1)

int hmm_init(void);
void hmm_cleanup(void);

ia_css_ptr hmm_alloc(size_t bytes);
ia_css_ptr hmm_create_from_userdata(size_t bytes, const void __user *userptr);
ia_css_ptr hmm_create_from_vmalloc_buf(size_t bytes, void *vmalloc_addr);

void hmm_free(ia_css_ptr ptr);
int hmm_load(ia_css_ptr virt, void *data, unsigned int bytes);
int hmm_store(ia_css_ptr virt, const void *data, unsigned int bytes);
int hmm_set(ia_css_ptr virt, int c, unsigned int bytes);
int hmm_flush(ia_css_ptr virt, unsigned int bytes);

/*
 * get kernel memory physical address from ISP virtual address.
 */
phys_addr_t hmm_virt_to_phys(ia_css_ptr virt);

/*
 * map ISP memory starts with virt to kernel virtual address
 * by using vmap. return NULL if failed.
 *
 * virt must be the start address of ISP memory (return by hmm_alloc),
 * do not pass any other address.
 */
void *hmm_vmap(ia_css_ptr virt, bool cached);
void hmm_vunmap(ia_css_ptr virt);

/*
 * flush the cache for the vmapped buffer.
 * if the buffer has not been vmapped, return directly.
 */
void hmm_flush_vmap(ia_css_ptr virt);

/*
 * map ISP memory starts with virt to specific vma.
 *
 * used for mmap operation.
 *
 * virt must be the start address of ISP memory (return by hmm_alloc),
 * do not pass any other address.
 */
int hmm_mmap(struct vm_area_struct *vma, ia_css_ptr virt);

extern struct hmm_bo_device bo_device;

#endif