1 /* Copyright (c) 2013, The Linux Foundation. All rights reserved.
2 *
3 * Redistribution and use in source and binary forms, with or without
4 * modification, are permitted provided that the following conditions are
5 * met:
6 * * Redistributions of source code must retain the above copyright
7 * notice, this list of conditions and the following disclaimer.
8 * * Redistributions in binary form must reproduce the above
9 * copyright notice, this list of conditions and the following
10 * disclaimer in the documentation and/or other materials provided
11 * with the distribution.
12 * * Neither the name of The Linux Foundation nor the names of its
13 * contributors may be used to endorse or promote products derived
14 * from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
23 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
25 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
26 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 */
29
30 #include "mm_jpeg_ionbuf.h"
31 #include <linux/msm_ion.h>
32
33 /** buffer_allocate:
34 *
35 * Arguments:
36 * @p_buffer: ION buffer
37 *
38 * Return:
39 * buffer address
40 *
41 * Description:
42 * allocates ION buffer
43 *
44 **/
buffer_allocate(buffer_t * p_buffer,int cached)45 void *buffer_allocate(buffer_t *p_buffer, int cached)
46 {
47 void *l_buffer = NULL;
48
49 int lrc = 0;
50 struct ion_handle_data lhandle_data;
51
52 p_buffer->alloc.len = p_buffer->size;
53 p_buffer->alloc.align = 4096;
54 p_buffer->alloc.flags = (cached) ? ION_FLAG_CACHED : 0;
55 p_buffer->alloc.heap_mask = 0x1 << ION_IOMMU_HEAP_ID;
56
57 p_buffer->ion_fd = open("/dev/ion", O_RDONLY);
58 if(p_buffer->ion_fd < 0) {
59 CDBG_ERROR("%s :Ion open failed", __func__);
60 goto ION_ALLOC_FAILED;
61 }
62
63 /* Make it page size aligned */
64 p_buffer->alloc.len = (p_buffer->alloc.len + 4095) & (~4095);
65 lrc = ioctl(p_buffer->ion_fd, ION_IOC_ALLOC, &p_buffer->alloc);
66 if (lrc < 0) {
67 CDBG_ERROR("%s :ION allocation failed len %d", __func__,
68 p_buffer->alloc.len);
69 goto ION_ALLOC_FAILED;
70 }
71
72 p_buffer->ion_info_fd.handle = p_buffer->alloc.handle;
73 lrc = ioctl(p_buffer->ion_fd, ION_IOC_SHARE,
74 &p_buffer->ion_info_fd);
75 if (lrc < 0) {
76 CDBG_ERROR("%s :ION map failed %s", __func__, strerror(errno));
77 goto ION_MAP_FAILED;
78 }
79
80 p_buffer->p_pmem_fd = p_buffer->ion_info_fd.fd;
81
82 l_buffer = mmap(NULL, p_buffer->alloc.len, PROT_READ | PROT_WRITE,
83 MAP_SHARED,p_buffer->p_pmem_fd, 0);
84
85 if (l_buffer == MAP_FAILED) {
86 CDBG_ERROR("%s :ION_MMAP_FAILED: %s (%d)", __func__,
87 strerror(errno), errno);
88 goto ION_MAP_FAILED;
89 }
90
91 return l_buffer;
92
93 ION_MAP_FAILED:
94 lhandle_data.handle = p_buffer->ion_info_fd.handle;
95 ioctl(p_buffer->ion_fd, ION_IOC_FREE, &lhandle_data);
96 return NULL;
97 ION_ALLOC_FAILED:
98 return NULL;
99
100 }
101
102 /** buffer_deallocate:
103 *
104 * Arguments:
105 * @p_buffer: ION buffer
106 *
107 * Return:
108 * buffer address
109 *
110 * Description:
111 * deallocates ION buffer
112 *
113 **/
buffer_deallocate(buffer_t * p_buffer)114 int buffer_deallocate(buffer_t *p_buffer)
115 {
116 int lrc = 0;
117 int lsize = (p_buffer->size + 4095) & (~4095);
118
119 struct ion_handle_data lhandle_data;
120 lrc = munmap(p_buffer->addr, lsize);
121
122 close(p_buffer->ion_info_fd.fd);
123
124 lhandle_data.handle = p_buffer->ion_info_fd.handle;
125 ioctl(p_buffer->ion_fd, ION_IOC_FREE, &lhandle_data);
126
127 close(p_buffer->ion_fd);
128 return lrc;
129 }
130
131 /** buffer_invalidate:
132 *
133 * Arguments:
134 * @p_buffer: ION buffer
135 *
136 * Return:
137 * error val
138 *
139 * Description:
140 * Invalidates the cached buffer
141 *
142 **/
buffer_invalidate(buffer_t * p_buffer)143 int buffer_invalidate(buffer_t *p_buffer)
144 {
145 int lrc = 0;
146 struct ion_flush_data cache_inv_data;
147 struct ion_custom_data custom_data;
148
149 memset(&cache_inv_data, 0, sizeof(cache_inv_data));
150 memset(&custom_data, 0, sizeof(custom_data));
151 cache_inv_data.vaddr = p_buffer->addr;
152 cache_inv_data.fd = p_buffer->ion_info_fd.fd;
153 cache_inv_data.handle = p_buffer->ion_info_fd.handle;
154 cache_inv_data.length = p_buffer->size;
155 custom_data.cmd = ION_IOC_INV_CACHES;
156 custom_data.arg = (unsigned long)&cache_inv_data;
157
158 lrc = ioctl(p_buffer->ion_info_fd.fd, ION_IOC_CUSTOM, &custom_data);
159 if (lrc < 0)
160 CDBG_ERROR("%s: Cache Invalidate failed: %s\n", __func__, strerror(errno));
161
162 return lrc;
163 }
164