1 /*
2  * Support for Medifield PNW Camera Imaging ISP subsystem.
3  *
4  * Copyright (c) 2010 Intel Corporation. All Rights Reserved.
5  *
6  * Copyright (c) 2010 Silicon Hive www.siliconhive.com.
7  *
8  * This program is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU General Public License version
10  * 2 as published by the Free Software Foundation.
11  *
12  * This program is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15  * GNU General Public License for more details.
16  *
17  *
18  */
19 
20 #ifndef	__HMM_H__
21 #define	__HMM_H__
22 
23 #include <linux/kernel.h>
24 #include <linux/types.h>
25 #include <linux/slab.h>
26 #include <linux/mm.h>
27 
28 #include "hmm/hmm_pool.h"
29 #include "ia_css_types.h"
30 
31 int hmm_pool_register(unsigned int pool_size, enum hmm_pool_type pool_type);
32 void hmm_pool_unregister(enum hmm_pool_type pool_type);
33 
34 int hmm_init(void);
35 void hmm_cleanup(void);
36 
37 ia_css_ptr hmm_alloc(size_t bytes, enum hmm_bo_type type,
38 		     int from_highmem, const void __user *userptr,
39 		     const uint16_t attrs);
40 void hmm_free(ia_css_ptr ptr);
41 int hmm_load(ia_css_ptr virt, void *data, unsigned int bytes);
42 int hmm_store(ia_css_ptr virt, const void *data, unsigned int bytes);
43 int hmm_set(ia_css_ptr virt, int c, unsigned int bytes);
44 int hmm_flush(ia_css_ptr virt, unsigned int bytes);
45 
46 /*
47  * get kernel memory physical address from ISP virtual address.
48  */
49 phys_addr_t hmm_virt_to_phys(ia_css_ptr virt);
50 
51 /*
52  * map ISP memory starts with virt to kernel virtual address
53  * by using vmap. return NULL if failed.
54  *
55  * virt must be the start address of ISP memory (return by hmm_alloc),
56  * do not pass any other address.
57  */
58 void *hmm_vmap(ia_css_ptr virt, bool cached);
59 void hmm_vunmap(ia_css_ptr virt);
60 
61 /*
62  * flush the cache for the vmapped buffer.
63  * if the buffer has not been vmapped, return directly.
64  */
65 void hmm_flush_vmap(ia_css_ptr virt);
66 
67 /*
68  * Address translation from ISP shared memory address to kernel virtual address
69  * if the memory is not vmmaped,  then do it.
70  */
71 void *hmm_isp_vaddr_to_host_vaddr(ia_css_ptr ptr, bool cached);
72 
73 /*
74  * Address translation from kernel virtual address to ISP shared memory address
75  */
76 ia_css_ptr hmm_host_vaddr_to_hrt_vaddr(const void *ptr);
77 
78 /*
79  * map ISP memory starts with virt to specific vma.
80  *
81  * used for mmap operation.
82  *
83  * virt must be the start address of ISP memory (return by hmm_alloc),
84  * do not pass any other address.
85  */
86 int hmm_mmap(struct vm_area_struct *vma, ia_css_ptr virt);
87 
88 /* show memory statistic
89  */
90 void hmm_show_mem_stat(const char *func, const int line);
91 
92 /* init memory statistic
93  */
94 void hmm_init_mem_stat(int res_pgnr, int dyc_en, int dyc_pgnr);
95 
96 extern bool dypool_enable;
97 extern unsigned int dypool_pgnr;
98 extern struct hmm_bo_device bo_device;
99 
100 #endif
101