3 * Intel Management Engine Interface (Intel MEI) Linux driver
4 * Copyright (c) 2012-2013, Intel Corporation.
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms and conditions of the GNU General Public License,
8 * version 2, as published by the Free Software Foundation.
10 * This program is distributed in the hope it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
16 #include <linux/slab.h>
17 #include <linux/kernel.h>
18 #include <linux/device.h>
19 #include <linux/debugfs.h>
20 #include <linux/pci.h>
22 #include <linux/mei.h>
27 static ssize_t mei_dbgfs_read_meclients(struct file *fp, char __user *ubuf,
28 size_t cnt, loff_t *ppos)
30 struct mei_device *dev = fp->private_data;
31 struct mei_me_client *cl;
32 const size_t bufsz = 1024;
33 char *buf = kzalloc(bufsz, GFP_KERNEL);
41 pos += scnprintf(buf + pos, bufsz - pos,
42 " |id|addr| UUID |con|msg len|\n");
44 mutex_lock(&dev->device_lock);
46 /* if the driver is not enabled the list won't be consistent */
47 if (dev->dev_state != MEI_DEV_ENABLED)
50 for (i = 0; i < dev->me_clients_num; i++) {
51 cl = &dev->me_clients[i];
53 /* skip me clients that cannot be connected */
54 if (cl->props.max_number_of_connections == 0)
57 pos += scnprintf(buf + pos, bufsz - pos,
58 "%2d|%2d|%4d|%pUl|%3d|%7d|\n",
60 cl->props.fixed_address,
61 &cl->props.protocol_name,
62 cl->props.max_number_of_connections,
63 cl->props.max_msg_length);
66 mutex_unlock(&dev->device_lock);
67 ret = simple_read_from_buffer(ubuf, cnt, ppos, buf, pos);
72 static const struct file_operations mei_dbgfs_fops_meclients = {
74 .read = mei_dbgfs_read_meclients,
75 .llseek = generic_file_llseek,
78 static ssize_t mei_dbgfs_read_active(struct file *fp, char __user *ubuf,
79 size_t cnt, loff_t *ppos)
81 struct mei_device *dev = fp->private_data;
83 const size_t bufsz = 1024;
92 buf = kzalloc(bufsz, GFP_KERNEL);
96 pos += scnprintf(buf + pos, bufsz - pos,
97 " |me|host|state|rd|wr|\n");
99 mutex_lock(&dev->device_lock);
101 /* if the driver is not enabled the list won't b consitent */
102 if (dev->dev_state != MEI_DEV_ENABLED)
105 list_for_each_entry(cl, &dev->file_list, link) {
107 pos += scnprintf(buf + pos, bufsz - pos,
108 "%2d|%2d|%4d|%5d|%2d|%2d|\n",
109 i, cl->me_client_id, cl->host_client_id, cl->state,
110 cl->reading_state, cl->writing_state);
114 mutex_unlock(&dev->device_lock);
115 ret = simple_read_from_buffer(ubuf, cnt, ppos, buf, pos);
120 static const struct file_operations mei_dbgfs_fops_active = {
122 .read = mei_dbgfs_read_active,
123 .llseek = generic_file_llseek,
126 static ssize_t mei_dbgfs_read_devstate(struct file *fp, char __user *ubuf,
127 size_t cnt, loff_t *ppos)
129 struct mei_device *dev = fp->private_data;
130 const size_t bufsz = 1024;
131 char *buf = kzalloc(bufsz, GFP_KERNEL);
138 pos += scnprintf(buf + pos, bufsz - pos, "%s\n",
139 mei_dev_state_str(dev->dev_state));
140 ret = simple_read_from_buffer(ubuf, cnt, ppos, buf, pos);
144 static const struct file_operations mei_dbgfs_fops_devstate = {
146 .read = mei_dbgfs_read_devstate,
147 .llseek = generic_file_llseek,
151 * mei_dbgfs_deregister - Remove the debugfs files and directories
152 * @mei - pointer to mei device private data
154 void mei_dbgfs_deregister(struct mei_device *dev)
158 debugfs_remove_recursive(dev->dbgfs_dir);
159 dev->dbgfs_dir = NULL;
163 * Add the debugfs files
166 int mei_dbgfs_register(struct mei_device *dev, const char *name)
168 struct dentry *dir, *f;
169 dir = debugfs_create_dir(name, NULL);
173 f = debugfs_create_file("meclients", S_IRUSR, dir,
174 dev, &mei_dbgfs_fops_meclients);
176 dev_err(&dev->pdev->dev, "meclients: registration failed\n");
179 f = debugfs_create_file("active", S_IRUSR, dir,
180 dev, &mei_dbgfs_fops_active);
182 dev_err(&dev->pdev->dev, "meclients: registration failed\n");
185 f = debugfs_create_file("devstate", S_IRUSR, dir,
186 dev, &mei_dbgfs_fops_devstate);
188 dev_err(&dev->pdev->dev, "devstate: registration failed\n");
191 dev->dbgfs_dir = dir;
194 mei_dbgfs_deregister(dev);