62 lines
1.1 KiB
C
62 lines
1.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2021 MediaTek Inc.
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*/
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#include <linux/slab.h>
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#include <linux/uaccess.h>
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#include "mdw_ioctl.h"
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#include "mdw_cmn.h"
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long mdw_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
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{
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int ret = 0;
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unsigned int usize = 0;
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void *kdata = NULL;
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struct mdw_fpriv *mpriv = filp->private_data;
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/* allocate for user data */
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usize = _IOC_SIZE(cmd);
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kdata = kzalloc(usize, GFP_KERNEL);
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if (!kdata)
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return -ENOMEM;
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/* copy from user data */
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if (cmd & IOC_IN) {
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if (copy_from_user(kdata, (void __user *)arg, usize)) {
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ret = -EFAULT;
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goto out;
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}
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}
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switch (cmd) {
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case APU_MDW_IOCTL_HANDSHAKE:
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ret = mdw_hs_ioctl(mpriv, kdata);
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break;
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case APU_MDW_IOCTL_MEM:
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ret = mdw_mem_ioctl(mpriv, kdata);
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break;
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case APU_MDW_IOCTL_CMD:
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ret = mdw_cmd_ioctl(mpriv, kdata);
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break;
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case APU_MDW_IOCTL_UTIL:
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ret = mdw_util_ioctl(mpriv, kdata);
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break;
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default:
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ret = -EFAULT;
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goto out;
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}
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/* copy to user data */
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if (cmd & IOC_OUT) {
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if (copy_to_user((void __user *)arg, kdata, usize)) {
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ret = -EFAULT;
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goto out;
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}
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}
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out:
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kfree(kdata);
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return ret;
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}
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