1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * Support for Medifield PNW Camera Imaging ISP subsystem.
4 *
5 * Copyright (c) 2010 Intel Corporation. All Rights Reserved.
6 *
7 * Copyright (c) 2010 Silicon Hive www.siliconhive.com.
8 *
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License version
11 * 2 as published by the Free Software Foundation.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16 * GNU General Public License for more details.
17 *
18 *
19 */
20
21#ifndef	__HMM_H__
22#define	__HMM_H__
23
24#include <linux/kernel.h>
25#include <linux/types.h>
26#include <linux/slab.h>
27#include <linux/mm.h>
28
29#include "hmm_common.h"
30#include "hmm/hmm_bo.h"
31#include "ia_css_types.h"
32
33#define mmgr_NULL              ((ia_css_ptr)0)
34#define mmgr_EXCEPTION         ((ia_css_ptr) - 1)
35
36int hmm_init(void);
37void hmm_cleanup(void);
38
39ia_css_ptr hmm_alloc(size_t bytes);
40ia_css_ptr hmm_create_from_vmalloc_buf(size_t bytes, void *vmalloc_addr);
41
42void hmm_free(ia_css_ptr ptr);
43int hmm_load(ia_css_ptr virt, void *data, unsigned int bytes);
44int hmm_store(ia_css_ptr virt, const void *data, unsigned int bytes);
45int hmm_set(ia_css_ptr virt, int c, unsigned int bytes);
46int hmm_flush(ia_css_ptr virt, unsigned int bytes);
47
48/*
49 * get kernel memory physical address from ISP virtual address.
50 */
51phys_addr_t hmm_virt_to_phys(ia_css_ptr virt);
52
53/*
54 * map ISP memory starts with virt to kernel virtual address
55 * by using vmap. return NULL if failed.
56 *
57 * virt must be the start address of ISP memory (return by hmm_alloc),
58 * do not pass any other address.
59 */
60void *hmm_vmap(ia_css_ptr virt, bool cached);
61void hmm_vunmap(ia_css_ptr virt);
62
63/*
64 * flush the cache for the vmapped buffer.
65 * if the buffer has not been vmapped, return directly.
66 */
67void hmm_flush_vmap(ia_css_ptr virt);
68
69/*
70 * map ISP memory starts with virt to specific vma.
71 *
72 * used for mmap operation.
73 *
74 * virt must be the start address of ISP memory (return by hmm_alloc),
75 * do not pass any other address.
76 */
77int hmm_mmap(struct vm_area_struct *vma, ia_css_ptr virt);
78
79extern struct hmm_bo_device bo_device;
80
81#endif
82