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/* Copyright (c) 2013-2014, 2016, The Linux Foundation. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
* * Neither the name of The Linux Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
// System dependencies
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <string.h>
#include <linux/msm_ion.h>
#define MMAN_H <SYSTEM_HEADER_PREFIX/mman.h>
#include MMAN_H
// JPEG dependencies
#include "mm_jpeg_ionbuf.h"
/** buffer_allocate:
*
* Arguments:
* @p_buffer: ION buffer
*
* Return:
* buffer address
*
* Description:
* allocates ION buffer
*
**/
void *buffer_allocate(buffer_t *p_buffer, int cached)
{
void *l_buffer = NULL;
int lrc = 0;
struct ion_handle_data lhandle_data;
p_buffer->alloc.len = p_buffer->size;
p_buffer->alloc.align = 4096;
p_buffer->alloc.flags = (cached) ? ION_FLAG_CACHED : 0;
p_buffer->alloc.heap_id_mask = 0x1 << ION_IOMMU_HEAP_ID;
p_buffer->ion_fd = open("/dev/ion", O_RDONLY);
if(p_buffer->ion_fd < 0) {
LOGE("Ion open failed");
goto ION_ALLOC_FAILED;
}
/* Make it page size aligned */
p_buffer->alloc.len = (p_buffer->alloc.len + 4095U) & (~4095U);
lrc = ioctl(p_buffer->ion_fd, ION_IOC_ALLOC, &p_buffer->alloc);
if (lrc < 0) {
LOGE("ION allocation failed len %zu",
p_buffer->alloc.len);
goto ION_ALLOC_FAILED;
}
p_buffer->ion_info_fd.handle = p_buffer->alloc.handle;
lrc = ioctl(p_buffer->ion_fd, ION_IOC_SHARE,
&p_buffer->ion_info_fd);
if (lrc < 0) {
LOGE("ION map failed %s", strerror(errno));
goto ION_MAP_FAILED;
}
p_buffer->p_pmem_fd = p_buffer->ion_info_fd.fd;
l_buffer = mmap(NULL, p_buffer->alloc.len, PROT_READ | PROT_WRITE,
MAP_SHARED,p_buffer->p_pmem_fd, 0);
if (l_buffer == MAP_FAILED) {
LOGE("ION_MMAP_FAILED: %s (%d)",
strerror(errno), errno);
goto ION_MAP_FAILED;
}
return l_buffer;
ION_MAP_FAILED:
lhandle_data.handle = p_buffer->ion_info_fd.handle;
ioctl(p_buffer->ion_fd, ION_IOC_FREE, &lhandle_data);
return NULL;
ION_ALLOC_FAILED:
return NULL;
}
/** buffer_deallocate:
*
* Arguments:
* @p_buffer: ION buffer
*
* Return:
* buffer address
*
* Description:
* deallocates ION buffer
*
**/
int buffer_deallocate(buffer_t *p_buffer)
{
int lrc = 0;
size_t lsize = (p_buffer->size + 4095U) & (~4095U);
struct ion_handle_data lhandle_data;
lrc = munmap(p_buffer->addr, lsize);
close(p_buffer->ion_info_fd.fd);
lhandle_data.handle = p_buffer->ion_info_fd.handle;
ioctl(p_buffer->ion_fd, ION_IOC_FREE, &lhandle_data);
close(p_buffer->ion_fd);
return lrc;
}
/** buffer_invalidate:
*
* Arguments:
* @p_buffer: ION buffer
*
* Return:
* error val
*
* Description:
* Invalidates the cached buffer
*
**/
int buffer_invalidate(buffer_t *p_buffer)
{
int lrc = 0;
struct ion_flush_data cache_inv_data;
struct ion_custom_data custom_data;
memset(&cache_inv_data, 0, sizeof(cache_inv_data));
memset(&custom_data, 0, sizeof(custom_data));
cache_inv_data.vaddr = p_buffer->addr;
cache_inv_data.fd = p_buffer->ion_info_fd.fd;
cache_inv_data.handle = p_buffer->ion_info_fd.handle;
cache_inv_data.length = (unsigned int)p_buffer->size;
custom_data.cmd = (unsigned int)ION_IOC_INV_CACHES;
custom_data.arg = (unsigned long)&cache_inv_data;
lrc = ioctl(p_buffer->ion_fd, ION_IOC_CUSTOM, &custom_data);
if (lrc < 0)
LOGW("Cache Invalidate failed: %s\n", strerror(errno));
return lrc;
}
/** buffer_clean:
*
* Arguments:
* @p_buffer: ION buffer
*
* Return:
* error val
*
* Description:
* Clean the cached buffer
*
**/
int buffer_clean(buffer_t *p_buffer)
{
int lrc = 0;
struct ion_flush_data cache_clean_data;
struct ion_custom_data custom_data;
memset(&cache_clean_data, 0, sizeof(cache_clean_data));
memset(&custom_data, 0, sizeof(custom_data));
cache_clean_data.vaddr = p_buffer->addr;
cache_clean_data.fd = p_buffer->ion_info_fd.fd;
cache_clean_data.handle = p_buffer->ion_info_fd.handle;
cache_clean_data.length = (unsigned int)p_buffer->size;
custom_data.cmd = (unsigned int)ION_IOC_CLEAN_CACHES;
custom_data.arg = (unsigned long)&cache_clean_data;
lrc = ioctl(p_buffer->ion_fd, ION_IOC_CUSTOM, &custom_data);
if (lrc < 0)
LOGW("Cache clean failed: %s\n", strerror(errno));
return lrc;
}
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