fcd2ba62ee
Allow setting constraints from userspace for more convenient testing. Example usage: cd /sys/kernel/debug/interconnect-test/ echo -n 3 > src_port echo -n 53 > dst_port echo -n 1 > get echo -n 80000000 > avg_bw echo -n 90000000 > peak_bw echo -n 1 > commit Change-Id: I8a47c45a8060607470edc870b1eb4245bb7ffc54 Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org> Signed-off-by: David Dai <daidavid1@codeaurora.org> Git-commit: 8b9e75c3e826f6a719ff02fa409f6b9c92aee66c Git-repo: https://git.linaro.org/people/georgi.djakov/linux.git Signed-off-by: Georgi Djakov <gdjako@codeaurora.org>
116 lines
2.7 KiB
C
116 lines
2.7 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2017, Linaro Ltd.
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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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#ifdef CONFIG_DEBUG_FS
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#include <linux/debugfs.h>
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#include <linux/interconnect.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/uaccess.h>
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static struct platform_device *icc_pdev;
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static struct dentry *debugfs_dir;
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static struct icc_path *path;
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static u32 src_port;
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static u32 dst_port;
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static u32 avg_bw;
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static u32 peak_bw;
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static ssize_t get_write_op(struct file *file, char const __user *buf,
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size_t count, loff_t *ppos)
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{
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unsigned long val;
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int ret;
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ret = kstrtoul_from_user(buf, count, 10, &val);
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if (ret)
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return ret;
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path = icc_get(&icc_pdev->dev, src_port, dst_port);
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if (IS_ERR(path))
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return PTR_ERR(path);
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*ppos += count;
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return count;
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}
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static const struct file_operations get_fops = {
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.owner = THIS_MODULE,
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.write = get_write_op
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};
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static ssize_t commit_write_op(struct file *file, char const __user *buf,
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size_t count, loff_t *ppos)
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{
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unsigned long val;
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int ret;
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ret = kstrtoul_from_user(buf, count, 10, &val);
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if (ret)
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return ret;
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if (IS_ERR(path))
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return PTR_ERR(path);
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ret = icc_set_bw(path, avg_bw, peak_bw);
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if (ret)
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return ret;
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*ppos += count;
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return count;
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}
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static const struct file_operations commit_fops = {
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.owner = THIS_MODULE,
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.write = commit_write_op
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};
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static void __exit icc_test_exit(void)
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{
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if (!IS_ERR(path))
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icc_put(path);
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debugfs_remove_recursive(debugfs_dir);
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platform_device_del(icc_pdev);
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platform_device_put(icc_pdev);
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}
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static int __init icc_test_init(void)
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{
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icc_pdev = platform_device_alloc("icc-test", PLATFORM_DEVID_AUTO);
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platform_device_add(icc_pdev);
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debugfs_dir = debugfs_create_dir("interconnect-test", NULL);
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if (!debugfs_dir)
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pr_err("interconnect: error creating debugfs directory\n");
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debugfs_create_u32("src_port", 0600, debugfs_dir, &src_port);
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debugfs_create_u32("dst_port", 0600, debugfs_dir, &dst_port);
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debugfs_create_file("get", 0200, debugfs_dir, NULL, &get_fops);
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debugfs_create_u32("avg_bw", 0600, debugfs_dir, &avg_bw);
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debugfs_create_u32("peak_bw", 0600, debugfs_dir, &peak_bw);
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debugfs_create_file("commit", 0200, debugfs_dir, NULL, &commit_fops);
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return 0;
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}
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module_init(icc_test_init);
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module_exit(icc_test_exit);
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MODULE_LICENSE("GPL v2");
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#endif
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