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 <sys/ioctl.h>
31 #include <linux/msm_ion.h>
32 #include "mm_jpeg_ionbuf.h"
33
34 /** buffer_allocate:
35 *
36 * Arguments:
37 * @p_buffer: ION buffer
38 *
39 * Return:
40 * buffer address
41 *
42 * Description:
43 * allocates ION buffer
44 *
45 **/
buffer_allocate(buffer_test_t * p_buffer)46 void *buffer_allocate(buffer_test_t *p_buffer)
47 {
48 void *l_buffer = NULL;
49
50 int lrc = 0;
51 struct ion_handle_data lhandle_data;
52
53 p_buffer->alloc.len = p_buffer->size;
54 p_buffer->alloc.align = 4096;
55 p_buffer->alloc.flags = ION_FLAG_CACHED;
56 p_buffer->alloc.heap_id_mask = 0x1 << ION_IOMMU_HEAP_ID;
57
58 p_buffer->ion_fd = open("/dev/ion", O_RDONLY);
59 if(p_buffer->ion_fd < 0) {
60 CDBG_ERROR("%s :Ion open failed", __func__);
61 goto ION_ALLOC_FAILED;
62 }
63
64 /* Make it page size aligned */
65 p_buffer->alloc.len = (p_buffer->alloc.len + 4095) & (~4095);
66 lrc = ioctl(p_buffer->ion_fd, ION_IOC_ALLOC, &p_buffer->alloc);
67 if (lrc < 0) {
68 CDBG_ERROR("%s :ION allocation failed len %d", __func__,
69 p_buffer->alloc.len);
70 goto ION_ALLOC_FAILED;
71 }
72
73 p_buffer->ion_info_fd.handle = p_buffer->alloc.handle;
74 lrc = ioctl(p_buffer->ion_fd, ION_IOC_SHARE,
75 &p_buffer->ion_info_fd);
76 if (lrc < 0) {
77 CDBG_ERROR("%s :ION map failed %s", __func__, strerror(errno));
78 goto ION_MAP_FAILED;
79 }
80
81 p_buffer->p_pmem_fd = p_buffer->ion_info_fd.fd;
82
83 l_buffer = mmap(NULL, p_buffer->alloc.len, PROT_READ | PROT_WRITE,
84 MAP_SHARED,p_buffer->p_pmem_fd, 0);
85
86 if (l_buffer == MAP_FAILED) {
87 CDBG_ERROR("%s :ION_MMAP_FAILED: %s (%d)", __func__,
88 strerror(errno), errno);
89 goto ION_MAP_FAILED;
90 }
91
92 return l_buffer;
93
94 ION_MAP_FAILED:
95 lhandle_data.handle = p_buffer->ion_info_fd.handle;
96 ioctl(p_buffer->ion_fd, ION_IOC_FREE, &lhandle_data);
97 return NULL;
98 ION_ALLOC_FAILED:
99 return NULL;
100
101 }
102
103 /** buffer_deallocate:
104 *
105 * Arguments:
106 * @p_buffer: ION buffer
107 *
108 * Return:
109 * buffer address
110 *
111 * Description:
112 * deallocates ION buffer
113 *
114 **/
buffer_deallocate(buffer_test_t * p_buffer)115 int buffer_deallocate(buffer_test_t *p_buffer)
116 {
117 int lrc = 0;
118 int lsize = (p_buffer->size + 4095) & (~4095);
119
120 struct ion_handle_data lhandle_data;
121 lrc = munmap(p_buffer->addr, lsize);
122
123 close(p_buffer->ion_info_fd.fd);
124
125 lhandle_data.handle = p_buffer->ion_info_fd.handle;
126 ioctl(p_buffer->ion_fd, ION_IOC_FREE, &lhandle_data);
127
128 close(p_buffer->ion_fd);
129 return lrc;
130 }
131
132
133