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/*
* drivers/gpu/ion/ion_dummy_driver.c
*
* Copyright (C) 2013 Linaro, Inc
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#include <linux/err.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/bootmem.h>
#include <linux/memblock.h>
#include <linux/sizes.h>
#include <linux/io.h>
#include "ion.h"
#include "ion_priv.h"
static struct ion_device *idev;
static struct ion_heap **heaps;
static void *carveout_ptr;
static void *chunk_ptr;
static struct ion_platform_heap dummy_heaps[] = {
{
.id = ION_HEAP_TYPE_SYSTEM,
.type = ION_HEAP_TYPE_SYSTEM,
.name = "system",
},
{
.id = ION_HEAP_TYPE_SYSTEM_CONTIG,
.type = ION_HEAP_TYPE_SYSTEM_CONTIG,
.name = "system contig",
},
{
.id = ION_HEAP_TYPE_CARVEOUT,
.type = ION_HEAP_TYPE_CARVEOUT,
.name = "carveout",
.size = SZ_4M,
},
{
.id = ION_HEAP_TYPE_CHUNK,
.type = ION_HEAP_TYPE_CHUNK,
.name = "chunk",
.size = SZ_4M,
.align = SZ_16K,
.priv = (void *)(SZ_16K),
},
};
static struct ion_platform_data dummy_ion_pdata = {
.nr = ARRAY_SIZE(dummy_heaps),
.heaps = dummy_heaps,
};
static int __init ion_dummy_init(void)
{
int i, err;
idev = ion_device_create(NULL);
heaps = kcalloc(dummy_ion_pdata.nr, sizeof(struct ion_heap *),
GFP_KERNEL);
if (!heaps)
return -ENOMEM;
/* Allocate a dummy carveout heap */
carveout_ptr = alloc_pages_exact(
dummy_heaps[ION_HEAP_TYPE_CARVEOUT].size,
GFP_KERNEL);
if (carveout_ptr)
dummy_heaps[ION_HEAP_TYPE_CARVEOUT].base =
virt_to_phys(carveout_ptr);
else
pr_err("ion_dummy: Could not allocate carveout\n");
/* Allocate a dummy chunk heap */
chunk_ptr = alloc_pages_exact(
dummy_heaps[ION_HEAP_TYPE_CHUNK].size,
GFP_KERNEL);
if (chunk_ptr)
dummy_heaps[ION_HEAP_TYPE_CHUNK].base = virt_to_phys(chunk_ptr);
else
pr_err("ion_dummy: Could not allocate chunk\n");
for (i = 0; i < dummy_ion_pdata.nr; i++) {
struct ion_platform_heap *heap_data = &dummy_ion_pdata.heaps[i];
if (heap_data->type == ION_HEAP_TYPE_CARVEOUT &&
!heap_data->base)
continue;
if (heap_data->type == ION_HEAP_TYPE_CHUNK && !heap_data->base)
continue;
heaps[i] = ion_heap_create(heap_data);
if (IS_ERR_OR_NULL(heaps[i])) {
err = PTR_ERR(heaps[i]);
goto err;
}
ion_device_add_heap(idev, heaps[i]);
}
return 0;
err:
for (i = 0; i < dummy_ion_pdata.nr; i++) {
if (heaps[i])
ion_heap_destroy(heaps[i]);
}
kfree(heaps);
if (carveout_ptr) {
free_pages_exact(carveout_ptr,
dummy_heaps[ION_HEAP_TYPE_CARVEOUT].size);
carveout_ptr = NULL;
}
if (chunk_ptr) {
free_pages_exact(chunk_ptr,
dummy_heaps[ION_HEAP_TYPE_CHUNK].size);
chunk_ptr = NULL;
}
return err;
}
device_initcall(ion_dummy_init);
static void __exit ion_dummy_exit(void)
{
int i;
ion_device_destroy(idev);
for (i = 0; i < dummy_ion_pdata.nr; i++)
ion_heap_destroy(heaps[i]);
kfree(heaps);
if (carveout_ptr) {
free_pages_exact(carveout_ptr,
dummy_heaps[ION_HEAP_TYPE_CARVEOUT].size);
carveout_ptr = NULL;
}
if (chunk_ptr) {
free_pages_exact(chunk_ptr,
dummy_heaps[ION_HEAP_TYPE_CHUNK].size);
chunk_ptr = NULL;
}
}
__exitcall(ion_dummy_exit);
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