hmm.h

 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
10#ifndef	__HMM_H__
11#define	__HMM_H__
12
13#include <linux/kernel.h>
14#include <linux/types.h>
15#include <linux/slab.h>
16#include <linux/mm.h>
17
18#include "hmm_common.h"
19#include "hmm/hmm_bo.h"
20#include "ia_css_types.h"
21
22#define mmgr_NULL              ((ia_css_ptr)0)
23#define mmgr_EXCEPTION         ((ia_css_ptr) - 1)
24
25int hmm_init(void);
26void hmm_cleanup(void);
27
28ia_css_ptr hmm_alloc(size_t bytes);
29ia_css_ptr hmm_create_from_vmalloc_buf(size_t bytes, void *vmalloc_addr);
30
31void hmm_free(ia_css_ptr ptr);
32int hmm_load(ia_css_ptr virt, void *data, unsigned int bytes);
33int hmm_store(ia_css_ptr virt, const void *data, unsigned int bytes);
34int hmm_set(ia_css_ptr virt, int c, unsigned int bytes);
35int hmm_flush(ia_css_ptr virt, unsigned int bytes);
36
37/*
38 * get kernel memory physical address from ISP virtual address.
39 */
40phys_addr_t hmm_virt_to_phys(ia_css_ptr virt);
41
42/*
43 * map ISP memory starts with virt to kernel virtual address
44 * by using vmap. return NULL if failed.
45 *
46 * virt must be the start address of ISP memory (return by hmm_alloc),
47 * do not pass any other address.
48 */
49void *hmm_vmap(ia_css_ptr virt, bool cached);
50void hmm_vunmap(ia_css_ptr virt);
51
52/*
53 * flush the cache for the vmapped buffer.
54 * if the buffer has not been vmapped, return directly.
55 */
56void hmm_flush_vmap(ia_css_ptr virt);
57
58/*
59 * map ISP memory starts with virt to specific vma.
60 *
61 * used for mmap operation.
62 *
63 * virt must be the start address of ISP memory (return by hmm_alloc),
64 * do not pass any other address.
65 */
66int hmm_mmap(struct vm_area_struct *vma, ia_css_ptr virt);
67
68extern struct hmm_bo_device bo_device;
69
70#endif