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/*
* drivers/gpu/omap/omap_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/omap_ion.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/uaccess.h>
#include "../ion_priv.h"
#include "omap_ion_priv.h"
struct ion_device *omap_ion_device;
EXPORT_SYMBOL(omap_ion_device);
int num_heaps;
struct ion_heap **heaps;
struct ion_heap *tiler_heap;
static struct ion_heap *nonsecure_tiler_heap;
int omap_ion_tiler_alloc(struct ion_client *client,
struct omap_ion_tiler_alloc_data *data)
{
return omap_tiler_alloc(tiler_heap, client, data);
}
int omap_ion_nonsecure_tiler_alloc(struct ion_client *client,
struct omap_ion_tiler_alloc_data *data)
{
if (!nonsecure_tiler_heap)
return -ENOMEM;
return omap_tiler_alloc(nonsecure_tiler_heap, client, data);
}
long omap_ion_ioctl(struct ion_client *client, unsigned int cmd,
unsigned long arg)
{
switch (cmd) {
case OMAP_ION_TILER_ALLOC:
{
struct omap_ion_tiler_alloc_data data;
int ret;
if (!tiler_heap) {
pr_err("%s: Tiler heap requested but no tiler "
"heap exists on this platform\n", __func__);
return -EINVAL;
}
if (copy_from_user(&data, (void __user *)arg, sizeof(data)))
return -EFAULT;
ret = omap_ion_tiler_alloc(client, &data);
if (ret)
return ret;
if (copy_to_user((void __user *)arg, &data,
sizeof(data)))
return -EFAULT;
break;
}
default:
pr_err("%s: Unknown custom ioctl\n", __func__);
return -ENOTTY;
}
return 0;
}
int omap_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);
omap_ion_device = ion_device_create(omap_ion_ioctl);
if (IS_ERR_OR_NULL(omap_ion_device)) {
kfree(heaps);
return PTR_ERR(omap_ion_device);
}
/* 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];
if (heap_data->type == OMAP_ION_HEAP_TYPE_TILER) {
heaps[i] = omap_tiler_heap_create(heap_data);
if (heap_data->id == OMAP_ION_HEAP_NONSECURE_TILER)
nonsecure_tiler_heap = heaps[i];
else
tiler_heap = heaps[i];
} else {
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(omap_ion_device, heaps[i]);
pr_info("%s: adding heap %s of type %d with %lx@%x\n",
__func__, heap_data->name, heap_data->type,
heap_data->base, heap_data->size);
}
platform_set_drvdata(pdev, omap_ion_device);
return 0;
err:
for (i = 0; i < num_heaps; i++) {
if (heaps[i]) {
if (heaps[i]->type == OMAP_ION_HEAP_TYPE_TILER)
omap_tiler_heap_destroy(heaps[i]);
else
ion_heap_destroy(heaps[i]);
}
}
kfree(heaps);
return err;
}
int omap_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++)
if (heaps[i]->type == OMAP_ION_HEAP_TYPE_TILER)
omap_tiler_heap_destroy(heaps[i]);
else
ion_heap_destroy(heaps[i]);
kfree(heaps);
return 0;
}
static struct platform_driver ion_driver = {
.probe = omap_ion_probe,
.remove = omap_ion_remove,
.driver = { .name = "ion-omap4" }
};
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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