97 lines
2.1 KiB
C
97 lines
2.1 KiB
C
/*
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* drivers/gpu/tegra/tegra_ion.c
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*
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* Copyright (C) 2011 Google, Inc.
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#include <linux/err.h>
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#include <linux/ion.h>
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#include <linux/platform_device.h>
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#include <linux/slab.h>
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#include "../ion_priv.h"
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struct ion_device *idev;
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struct ion_mapper *tegra_user_mapper;
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int num_heaps;
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struct ion_heap **heaps;
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int tegra_ion_probe(struct platform_device *pdev)
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{
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struct ion_platform_data *pdata = pdev->dev.platform_data;
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int err;
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int i;
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num_heaps = pdata->nr;
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heaps = kzalloc(sizeof(struct ion_heap *) * pdata->nr, GFP_KERNEL);
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idev = ion_device_create(NULL);
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if (IS_ERR_OR_NULL(idev)) {
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kfree(heaps);
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return PTR_ERR(idev);
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}
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/* create the heaps as specified in the board file */
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for (i = 0; i < num_heaps; i++) {
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struct ion_platform_heap *heap_data = &pdata->heaps[i];
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heaps[i] = ion_heap_create(heap_data);
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if (IS_ERR_OR_NULL(heaps[i])) {
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err = PTR_ERR(heaps[i]);
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goto err;
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}
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ion_device_add_heap(idev, heaps[i]);
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}
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platform_set_drvdata(pdev, idev);
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return 0;
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err:
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for (i = 0; i < num_heaps; i++) {
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if (heaps[i])
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ion_heap_destroy(heaps[i]);
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}
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kfree(heaps);
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return err;
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}
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int tegra_ion_remove(struct platform_device *pdev)
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{
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struct ion_device *idev = platform_get_drvdata(pdev);
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int i;
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ion_device_destroy(idev);
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for (i = 0; i < num_heaps; i++)
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ion_heap_destroy(heaps[i]);
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kfree(heaps);
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return 0;
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}
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static struct platform_driver ion_driver = {
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.probe = tegra_ion_probe,
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.remove = tegra_ion_remove,
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.driver = { .name = "ion-tegra" }
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};
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static int __init ion_init(void)
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{
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return platform_driver_register(&ion_driver);
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}
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static void __exit ion_exit(void)
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{
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platform_driver_unregister(&ion_driver);
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}
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module_init(ion_init);
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module_exit(ion_exit);
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