1/* Copyright (c) 2013-2014, 2016, 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// System dependencies
31#include <errno.h>
32#include <fcntl.h>
33#include <stdio.h>
34#include <string.h>
35#include <linux/msm_ion.h>
36#define MMAN_H <SYSTEM_HEADER_PREFIX/mman.h>
37#include MMAN_H
38
39// JPEG dependencies
40#include "mm_jpeg_ionbuf.h"
41
42/** buffer_allocate:
43 *
44 *  Arguments:
45 *     @p_buffer: ION buffer
46 *
47 *  Return:
48 *     buffer address
49 *
50 *  Description:
51 *      allocates ION buffer
52 *
53 **/
54void *buffer_allocate(buffer_t *p_buffer, int cached)
55{
56  void *l_buffer = NULL;
57
58  int lrc = 0;
59  struct ion_handle_data lhandle_data;
60
61   p_buffer->alloc.len = p_buffer->size;
62   p_buffer->alloc.align = 4096;
63   p_buffer->alloc.flags = (cached) ? ION_FLAG_CACHED : 0;
64   p_buffer->alloc.heap_id_mask = 0x1 << ION_IOMMU_HEAP_ID;
65
66   p_buffer->ion_fd = open("/dev/ion", O_RDONLY);
67   if(p_buffer->ion_fd < 0) {
68    LOGE("Ion open failed");
69    goto ION_ALLOC_FAILED;
70  }
71
72  /* Make it page size aligned */
73  p_buffer->alloc.len = (p_buffer->alloc.len + 4095U) & (~4095U);
74  lrc = ioctl(p_buffer->ion_fd, ION_IOC_ALLOC, &p_buffer->alloc);
75  if (lrc < 0) {
76    LOGE("ION allocation failed len %zu",
77      p_buffer->alloc.len);
78    goto ION_ALLOC_FAILED;
79  }
80
81  p_buffer->ion_info_fd.handle = p_buffer->alloc.handle;
82  lrc = ioctl(p_buffer->ion_fd, ION_IOC_SHARE,
83    &p_buffer->ion_info_fd);
84  if (lrc < 0) {
85    LOGE("ION map failed %s", strerror(errno));
86    goto ION_MAP_FAILED;
87  }
88
89  p_buffer->p_pmem_fd = p_buffer->ion_info_fd.fd;
90
91  l_buffer = mmap(NULL, p_buffer->alloc.len, PROT_READ  | PROT_WRITE,
92    MAP_SHARED,p_buffer->p_pmem_fd, 0);
93
94  if (l_buffer == MAP_FAILED) {
95    LOGE("ION_MMAP_FAILED: %s (%d)",
96      strerror(errno), errno);
97    goto ION_MAP_FAILED;
98  }
99
100  return l_buffer;
101
102ION_MAP_FAILED:
103  lhandle_data.handle = p_buffer->ion_info_fd.handle;
104  ioctl(p_buffer->ion_fd, ION_IOC_FREE, &lhandle_data);
105  return NULL;
106ION_ALLOC_FAILED:
107  return NULL;
108
109}
110
111/** buffer_deallocate:
112 *
113 *  Arguments:
114 *     @p_buffer: ION buffer
115 *
116 *  Return:
117 *     buffer address
118 *
119 *  Description:
120 *      deallocates ION buffer
121 *
122 **/
123int buffer_deallocate(buffer_t *p_buffer)
124{
125  int lrc = 0;
126  size_t lsize = (p_buffer->size + 4095U) & (~4095U);
127
128  struct ion_handle_data lhandle_data;
129  lrc = munmap(p_buffer->addr, lsize);
130
131  close(p_buffer->ion_info_fd.fd);
132
133  lhandle_data.handle = p_buffer->ion_info_fd.handle;
134  ioctl(p_buffer->ion_fd, ION_IOC_FREE, &lhandle_data);
135
136  close(p_buffer->ion_fd);
137  return lrc;
138}
139
140/** buffer_invalidate:
141 *
142 *  Arguments:
143 *     @p_buffer: ION buffer
144 *
145 *  Return:
146 *     error val
147 *
148 *  Description:
149 *      Invalidates the cached buffer
150 *
151 **/
152int buffer_invalidate(buffer_t *p_buffer)
153{
154  int lrc = 0;
155  struct ion_flush_data cache_inv_data;
156  struct ion_custom_data custom_data;
157
158  memset(&cache_inv_data, 0, sizeof(cache_inv_data));
159  memset(&custom_data, 0, sizeof(custom_data));
160  cache_inv_data.vaddr = p_buffer->addr;
161  cache_inv_data.fd = p_buffer->ion_info_fd.fd;
162  cache_inv_data.handle = p_buffer->ion_info_fd.handle;
163  cache_inv_data.length = (unsigned int)p_buffer->size;
164  custom_data.cmd = (unsigned int)ION_IOC_INV_CACHES;
165  custom_data.arg = (unsigned long)&cache_inv_data;
166
167  lrc = ioctl(p_buffer->ion_fd, ION_IOC_CUSTOM, &custom_data);
168  if (lrc < 0)
169    LOGW("Cache Invalidate failed: %s\n", strerror(errno));
170
171  return lrc;
172}
173
174/** buffer_clean:
175 *
176 *  Arguments:
177 *     @p_buffer: ION buffer
178 *
179 *  Return:
180 *     error val
181 *
182 *  Description:
183 *      Clean the cached buffer
184 *
185 **/
186int buffer_clean(buffer_t *p_buffer)
187{
188  int lrc = 0;
189  struct ion_flush_data cache_clean_data;
190  struct ion_custom_data custom_data;
191
192  memset(&cache_clean_data, 0, sizeof(cache_clean_data));
193  memset(&custom_data, 0, sizeof(custom_data));
194  cache_clean_data.vaddr = p_buffer->addr;
195  cache_clean_data.fd = p_buffer->ion_info_fd.fd;
196  cache_clean_data.handle = p_buffer->ion_info_fd.handle;
197  cache_clean_data.length = (unsigned int)p_buffer->size;
198  custom_data.cmd = (unsigned int)ION_IOC_CLEAN_CACHES;
199  custom_data.arg = (unsigned long)&cache_clean_data;
200
201  lrc = ioctl(p_buffer->ion_fd, ION_IOC_CUSTOM, &custom_data);
202  if (lrc < 0)
203    LOGW("Cache clean failed: %s\n", strerror(errno));
204
205  return lrc;
206}
207