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Diffstat (limited to 'drivers/staging/android/ion/ion_test.c')
-rw-r--r--drivers/staging/android/ion/ion_test.c305
1 files changed, 0 insertions, 305 deletions
diff --git a/drivers/staging/android/ion/ion_test.c b/drivers/staging/android/ion/ion_test.c
deleted file mode 100644
index 5abf8320..0000000
--- a/drivers/staging/android/ion/ion_test.c
+++ /dev/null
@@ -1,305 +0,0 @@
-/*
- *
- * Copyright (C) 2013 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.
- *
- */
-
-#define pr_fmt(fmt) "ion-test: " fmt
-
-#include <linux/dma-buf.h>
-#include <linux/dma-direction.h>
-#include <linux/fs.h>
-#include <linux/miscdevice.h>
-#include <linux/mm.h>
-#include <linux/module.h>
-#include <linux/platform_device.h>
-#include <linux/sched.h>
-#include <linux/slab.h>
-#include <linux/uaccess.h>
-#include <linux/vmalloc.h>
-
-#include "ion.h"
-#include "../uapi/ion_test.h"
-
-#define u64_to_uptr(x) ((void __user *)(unsigned long)(x))
-
-struct ion_test_device {
- struct miscdevice misc;
-};
-
-struct ion_test_data {
- struct dma_buf *dma_buf;
- struct device *dev;
-};
-
-static int ion_handle_test_dma(struct device *dev, struct dma_buf *dma_buf,
- void __user *ptr, size_t offset, size_t size,
- bool write)
-{
- int ret = 0;
- struct dma_buf_attachment *attach;
- struct sg_table *table;
- pgprot_t pgprot = pgprot_writecombine(PAGE_KERNEL);
- enum dma_data_direction dir = write ? DMA_FROM_DEVICE : DMA_TO_DEVICE;
- struct sg_page_iter sg_iter;
- unsigned long offset_page;
-
- attach = dma_buf_attach(dma_buf, dev);
- if (IS_ERR(attach))
- return PTR_ERR(attach);
-
- table = dma_buf_map_attachment(attach, dir);
- if (IS_ERR(table))
- return PTR_ERR(table);
-
- offset_page = offset >> PAGE_SHIFT;
- offset %= PAGE_SIZE;
-
- for_each_sg_page(table->sgl, &sg_iter, table->nents, offset_page) {
- struct page *page = sg_page_iter_page(&sg_iter);
- void *vaddr = vmap(&page, 1, VM_MAP, pgprot);
- size_t to_copy = PAGE_SIZE - offset;
-
- to_copy = min(to_copy, size);
- if (!vaddr) {
- ret = -ENOMEM;
- goto err;
- }
-
- if (write)
- ret = copy_from_user(vaddr + offset, ptr, to_copy);
- else
- ret = copy_to_user(ptr, vaddr + offset, to_copy);
-
- vunmap(vaddr);
- if (ret) {
- ret = -EFAULT;
- goto err;
- }
- size -= to_copy;
- if (!size)
- break;
- ptr += to_copy;
- offset = 0;
- }
-
-err:
- dma_buf_unmap_attachment(attach, table, dir);
- dma_buf_detach(dma_buf, attach);
- return ret;
-}
-
-static int ion_handle_test_kernel(struct dma_buf *dma_buf, void __user *ptr,
- size_t offset, size_t size, bool write)
-{
- int ret;
- unsigned long page_offset = offset >> PAGE_SHIFT;
- size_t copy_offset = offset % PAGE_SIZE;
- size_t copy_size = size;
- enum dma_data_direction dir = write ? DMA_FROM_DEVICE : DMA_TO_DEVICE;
-
- if (offset > dma_buf->size || size > dma_buf->size - offset)
- return -EINVAL;
-
- ret = dma_buf_begin_cpu_access(dma_buf, dir);
- if (ret)
- return ret;
-
- while (copy_size > 0) {
- size_t to_copy;
- void *vaddr = dma_buf_kmap(dma_buf, page_offset);
-
- if (!vaddr)
- goto err;
-
- to_copy = min_t(size_t, PAGE_SIZE - copy_offset, copy_size);
-
- if (write)
- ret = copy_from_user(vaddr + copy_offset, ptr, to_copy);
- else
- ret = copy_to_user(ptr, vaddr + copy_offset, to_copy);
-
- dma_buf_kunmap(dma_buf, page_offset, vaddr);
- if (ret) {
- ret = -EFAULT;
- goto err;
- }
-
- copy_size -= to_copy;
- ptr += to_copy;
- page_offset++;
- copy_offset = 0;
- }
-err:
- dma_buf_end_cpu_access(dma_buf, dir);
- return ret;
-}
-
-static long ion_test_ioctl(struct file *filp, unsigned int cmd,
- unsigned long arg)
-{
- struct ion_test_data *test_data = filp->private_data;
- int ret = 0;
-
- union {
- struct ion_test_rw_data test_rw;
- } data;
-
- if (_IOC_SIZE(cmd) > sizeof(data))
- return -EINVAL;
-
- if (_IOC_DIR(cmd) & _IOC_WRITE)
- if (copy_from_user(&data, (void __user *)arg, _IOC_SIZE(cmd)))
- return -EFAULT;
-
- switch (cmd) {
- case ION_IOC_TEST_SET_FD:
- {
- struct dma_buf *dma_buf = NULL;
- int fd = arg;
-
- if (fd >= 0) {
- dma_buf = dma_buf_get((int)arg);
- if (IS_ERR(dma_buf))
- return PTR_ERR(dma_buf);
- }
- if (test_data->dma_buf)
- dma_buf_put(test_data->dma_buf);
- test_data->dma_buf = dma_buf;
- break;
- }
- case ION_IOC_TEST_DMA_MAPPING:
- {
- ret = ion_handle_test_dma(test_data->dev, test_data->dma_buf,
- u64_to_uptr(data.test_rw.ptr),
- data.test_rw.offset,
- data.test_rw.size,
- data.test_rw.write);
- break;
- }
- case ION_IOC_TEST_KERNEL_MAPPING:
- {
- ret = ion_handle_test_kernel(test_data->dma_buf,
- u64_to_uptr(data.test_rw.ptr),
- data.test_rw.offset,
- data.test_rw.size,
- data.test_rw.write);
- break;
- }
- default:
- return -ENOTTY;
- }
-
- if (_IOC_DIR(cmd) & _IOC_READ) {
- if (copy_to_user((void __user *)arg, &data, sizeof(data)))
- return -EFAULT;
- }
- return ret;
-}
-
-static int ion_test_open(struct inode *inode, struct file *file)
-{
- struct ion_test_data *data;
- struct miscdevice *miscdev = file->private_data;
-
- data = kzalloc(sizeof(*data), GFP_KERNEL);
- if (!data)
- return -ENOMEM;
-
- data->dev = miscdev->parent;
-
- file->private_data = data;
-
- return 0;
-}
-
-static int ion_test_release(struct inode *inode, struct file *file)
-{
- struct ion_test_data *data = file->private_data;
-
- kfree(data);
-
- return 0;
-}
-
-static const struct file_operations ion_test_fops = {
- .owner = THIS_MODULE,
- .unlocked_ioctl = ion_test_ioctl,
- .compat_ioctl = ion_test_ioctl,
- .open = ion_test_open,
- .release = ion_test_release,
-};
-
-static int __init ion_test_probe(struct platform_device *pdev)
-{
- int ret;
- struct ion_test_device *testdev;
-
- testdev = devm_kzalloc(&pdev->dev, sizeof(struct ion_test_device),
- GFP_KERNEL);
- if (!testdev)
- return -ENOMEM;
-
- testdev->misc.minor = MISC_DYNAMIC_MINOR;
- testdev->misc.name = "ion-test";
- testdev->misc.fops = &ion_test_fops;
- testdev->misc.parent = &pdev->dev;
- ret = misc_register(&testdev->misc);
- if (ret) {
- pr_err("failed to register misc device.\n");
- return ret;
- }
-
- platform_set_drvdata(pdev, testdev);
-
- return 0;
-}
-
-static int ion_test_remove(struct platform_device *pdev)
-{
- struct ion_test_device *testdev;
-
- testdev = platform_get_drvdata(pdev);
- if (!testdev)
- return -ENODATA;
-
- misc_deregister(&testdev->misc);
- return 0;
-}
-
-static struct platform_device *ion_test_pdev;
-static struct platform_driver ion_test_platform_driver = {
- .remove = ion_test_remove,
- .driver = {
- .name = "ion-test",
- },
-};
-
-static int __init ion_test_init(void)
-{
- ion_test_pdev = platform_device_register_simple("ion-test",
- -1, NULL, 0);
- if (IS_ERR(ion_test_pdev))
- return PTR_ERR(ion_test_pdev);
-
- return platform_driver_probe(&ion_test_platform_driver, ion_test_probe);
-}
-
-static void __exit ion_test_exit(void)
-{
- platform_driver_unregister(&ion_test_platform_driver);
- platform_device_unregister(ion_test_pdev);
-}
-
-module_init(ion_test_init);
-module_exit(ion_test_exit);
-MODULE_LICENSE("GPL v2");
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