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/*
* drivers/gpu/tegra/tegra_ion.c
*
* Copyright (C) 2011 Google, 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/ion.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include "../ion_priv.h"
struct ion_device *idev;
struct ion_mapper *tegra_user_mapper;
int num_heaps;
struct ion_heap **heaps;
int tegra_ion_probe(struct platform_device *pdev)
{
struct ion_platform_data *pdata = pdev->dev.platform_data;
int err;
int i;
num_heaps = pdata->nr;
heaps = kzalloc(sizeof(struct ion_heap *) * pdata->nr, GFP_KERNEL);
idev = ion_device_create(NULL);
if (IS_ERR_OR_NULL(idev)) {
kfree(heaps);
return PTR_ERR(idev);
}
/* create the heaps as specified in the board file */
for (i = 0; i < num_heaps; i++) {
struct ion_platform_heap *heap_data = &pdata->heaps[i];
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]);
}
platform_set_drvdata(pdev, idev);
return 0;
err:
for (i = 0; i < num_heaps; i++) {
if (heaps[i])
ion_heap_destroy(heaps[i]);
}
kfree(heaps);
return err;
}
int tegra_ion_remove(struct platform_device *pdev)
{
struct ion_device *idev = platform_get_drvdata(pdev);
int i;
ion_device_destroy(idev);
for (i = 0; i < num_heaps; i++)
ion_heap_destroy(heaps[i]);
kfree(heaps);
return 0;
}
static struct platform_driver ion_driver = {
.probe = tegra_ion_probe,
.remove = tegra_ion_remove,
.driver = { .name = "ion-tegra" }
};
static int __init ion_init(void)
{
return platform_driver_register(&ion_driver);
}
static void __exit ion_exit(void)
{
platform_driver_unregister(&ion_driver);
}
module_init(ion_init);
module_exit(ion_exit);
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