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 #define mmgr_NULL              ((ia_css_ptr)0)
32 #define mmgr_EXCEPTION         ((ia_css_ptr) - 1)
33 
34 int hmm_pool_register(unsigned int pool_size, enum hmm_pool_type pool_type);
35 void hmm_pool_unregister(enum hmm_pool_type pool_type);
36 
37 int hmm_init(void);
38 void hmm_cleanup(void);
39 
40 ia_css_ptr hmm_alloc(size_t bytes, enum hmm_bo_type type,
41 		     int from_highmem, const void __user *userptr,
42 		     const uint16_t attrs);
43 void hmm_free(ia_css_ptr ptr);
44 int hmm_load(ia_css_ptr virt, void *data, unsigned int bytes);
45 int hmm_store(ia_css_ptr virt, const void *data, unsigned int bytes);
46 int hmm_set(ia_css_ptr virt, int c, unsigned int bytes);
47 int hmm_flush(ia_css_ptr virt, unsigned int bytes);
48 
49 /*
50  * get kernel memory physical address from ISP virtual address.
51  */
52 phys_addr_t hmm_virt_to_phys(ia_css_ptr virt);
53 
54 /*
55  * map ISP memory starts with virt to kernel virtual address
56  * by using vmap. return NULL if failed.
57  *
58  * virt must be the start address of ISP memory (return by hmm_alloc),
59  * do not pass any other address.
60  */
61 void *hmm_vmap(ia_css_ptr virt, bool cached);
62 void hmm_vunmap(ia_css_ptr virt);
63 
64 /*
65  * flush the cache for the vmapped buffer.
66  * if the buffer has not been vmapped, return directly.
67  */
68 void hmm_flush_vmap(ia_css_ptr virt);
69 
70 /*
71  * Address translation from ISP shared memory address to kernel virtual address
72  * if the memory is not vmmaped,  then do it.
73  */
74 void *hmm_isp_vaddr_to_host_vaddr(ia_css_ptr ptr, bool cached);
75 
76 /*
77  * Address translation from kernel virtual address to ISP shared memory address
78  */
79 ia_css_ptr hmm_host_vaddr_to_hrt_vaddr(const void *ptr);
80 
81 /*
82  * map ISP memory starts with virt to specific vma.
83  *
84  * used for mmap operation.
85  *
86  * virt must be the start address of ISP memory (return by hmm_alloc),
87  * do not pass any other address.
88  */
89 int hmm_mmap(struct vm_area_struct *vma, ia_css_ptr virt);
90 
91 /* show memory statistic
92  */
93 void hmm_show_mem_stat(const char *func, const int line);
94 
95 /* init memory statistic
96  */
97 void hmm_init_mem_stat(int res_pgnr, int dyc_en, int dyc_pgnr);
98 
99 extern bool dypool_enable;
100 extern unsigned int dypool_pgnr;
101 extern struct hmm_bo_device bo_device;
102 
103 #endif
104