85 lines
2 KiB
C
Executable file
85 lines
2 KiB
C
Executable file
/*
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* Copyright (c) 2014, STMicroelectronics International N.V.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License Version 2 as
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* published by the Free Software Foundation.
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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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#include <linux/kernel.h>
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#include <linux/debugfs.h>
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#include <linux/device.h>
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#include <linux/uaccess.h>
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#include "linux/tee_core.h"
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#include "tee_debugfs.h"
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static struct dentry *tee_debugfs_dir;
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static ssize_t tee_trace_read(struct file *filp, char __user *userbuf,
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size_t count, loff_t *ppos)
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{
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struct tee *tee = filp->private_data;
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char buff[258];
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int len = sprintf(buff, "device=%s\n NO LOG AVAILABLE\n", tee->name);
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return simple_read_from_buffer(userbuf, count, ppos, buff, len);
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}
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static const struct file_operations log_tee_ops = {
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.read = tee_trace_read,
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.open = simple_open,
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.llseek = generic_file_llseek,
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};
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void tee_create_debug_dir(struct tee *tee)
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{
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struct dentry *entry;
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struct device *dev = tee->miscdev.this_device;
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if (!tee_debugfs_dir)
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return;
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tee->dbg_dir = debugfs_create_dir(dev_name(dev), tee_debugfs_dir);
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if (!tee->dbg_dir)
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goto error_create_file;
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entry = debugfs_create_file("log", S_IRUGO, tee->dbg_dir,
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tee, &log_tee_ops);
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if (!entry)
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goto error_create_file;
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return;
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error_create_file:
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dev_err(dev, "can't create debugfs file\n");
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tee_delete_debug_dir(tee);
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}
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void tee_delete_debug_dir(struct tee *tee)
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{
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if (!tee || !tee->dbg_dir)
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return;
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debugfs_remove_recursive(tee->dbg_dir);
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}
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void __init tee_init_debugfs(void)
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{
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if (debugfs_initialized()) {
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tee_debugfs_dir = debugfs_create_dir("tee", NULL);
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if (IS_ERR(tee_debugfs_dir))
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pr_err("can't create debugfs dir\n");
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}
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}
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void __exit tee_exit_debugfs(void)
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{
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if (tee_debugfs_dir)
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debugfs_remove(tee_debugfs_dir);
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}
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