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30e53bb8 TW |
1 | /* |
2 | * | |
3 | * Intel Management Engine Interface (Intel MEI) Linux driver | |
4 | * Copyright (c) 2012-2013, Intel Corporation. | |
5 | * | |
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. | |
9 | * | |
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 | |
13 | * more details. | |
14 | * | |
15 | */ | |
16 | #include <linux/slab.h> | |
17 | #include <linux/kernel.h> | |
18 | #include <linux/device.h> | |
19 | #include <linux/debugfs.h> | |
30e53bb8 TW |
20 | |
21 | #include <linux/mei.h> | |
22 | ||
23 | #include "mei_dev.h" | |
79563db9 | 24 | #include "client.h" |
30e53bb8 TW |
25 | #include "hw.h" |
26 | ||
30e53bb8 TW |
27 | static ssize_t mei_dbgfs_read_meclients(struct file *fp, char __user *ubuf, |
28 | size_t cnt, loff_t *ppos) | |
29 | { | |
30 | struct mei_device *dev = fp->private_data; | |
79563db9 | 31 | struct mei_me_client *me_cl, *n; |
c4495200 AU |
32 | size_t bufsz = 1; |
33 | char *buf; | |
5ca2d388 | 34 | int i = 0; |
30e53bb8 TW |
35 | int pos = 0; |
36 | int ret; | |
37 | ||
79563db9 TW |
38 | #define HDR \ |
39 | " |id|fix| UUID |con|msg len|sb|refc|\n" | |
30e53bb8 TW |
40 | |
41 | mutex_lock(&dev->device_lock); | |
42 | ||
c4495200 AU |
43 | list_for_each_entry(me_cl, &dev->me_clients, list) |
44 | bufsz++; | |
45 | ||
46 | bufsz *= sizeof(HDR) + 1; | |
47 | buf = kzalloc(bufsz, GFP_KERNEL); | |
48 | if (!buf) { | |
49 | mutex_unlock(&dev->device_lock); | |
50 | return -ENOMEM; | |
51 | } | |
52 | ||
53 | pos += scnprintf(buf + pos, bufsz - pos, HDR); | |
54 | ||
83ce0741 | 55 | /* if the driver is not enabled the list won't be consistent */ |
30e53bb8 TW |
56 | if (dev->dev_state != MEI_DEV_ENABLED) |
57 | goto out; | |
58 | ||
79563db9 | 59 | list_for_each_entry_safe(me_cl, n, &dev->me_clients, list) { |
30e53bb8 | 60 | |
79563db9 TW |
61 | me_cl = mei_me_cl_get(me_cl); |
62 | if (me_cl) { | |
63 | pos += scnprintf(buf + pos, bufsz - pos, | |
64 | "%2d|%2d|%3d|%pUl|%3d|%7d|%2d|%4d|\n", | |
65 | i++, me_cl->client_id, | |
66 | me_cl->props.fixed_address, | |
67 | &me_cl->props.protocol_name, | |
68 | me_cl->props.max_number_of_connections, | |
69 | me_cl->props.max_msg_length, | |
70 | me_cl->props.single_recv_buf, | |
71 | atomic_read(&me_cl->refcnt.refcount)); | |
72 | } | |
73 | ||
74 | mei_me_cl_put(me_cl); | |
30e53bb8 TW |
75 | } |
76 | out: | |
77 | mutex_unlock(&dev->device_lock); | |
78 | ret = simple_read_from_buffer(ubuf, cnt, ppos, buf, pos); | |
79 | kfree(buf); | |
80 | return ret; | |
81 | } | |
82 | ||
83 | static const struct file_operations mei_dbgfs_fops_meclients = { | |
a42f82f5 | 84 | .open = simple_open, |
30e53bb8 TW |
85 | .read = mei_dbgfs_read_meclients, |
86 | .llseek = generic_file_llseek, | |
87 | }; | |
88 | ||
5baaf71f TW |
89 | static ssize_t mei_dbgfs_read_active(struct file *fp, char __user *ubuf, |
90 | size_t cnt, loff_t *ppos) | |
91 | { | |
92 | struct mei_device *dev = fp->private_data; | |
93 | struct mei_cl *cl; | |
94 | const size_t bufsz = 1024; | |
95 | char *buf; | |
96 | int i = 0; | |
97 | int pos = 0; | |
98 | int ret; | |
99 | ||
100 | if (!dev) | |
101 | return -ENODEV; | |
102 | ||
103 | buf = kzalloc(bufsz, GFP_KERNEL); | |
104 | if (!buf) | |
105 | return -ENOMEM; | |
106 | ||
107 | pos += scnprintf(buf + pos, bufsz - pos, | |
108 | " |me|host|state|rd|wr|\n"); | |
109 | ||
110 | mutex_lock(&dev->device_lock); | |
111 | ||
0a01e974 | 112 | /* if the driver is not enabled the list won't be consistent */ |
5baaf71f TW |
113 | if (dev->dev_state != MEI_DEV_ENABLED) |
114 | goto out; | |
115 | ||
116 | list_for_each_entry(cl, &dev->file_list, link) { | |
117 | ||
118 | pos += scnprintf(buf + pos, bufsz - pos, | |
119 | "%2d|%2d|%4d|%5d|%2d|%2d|\n", | |
120 | i, cl->me_client_id, cl->host_client_id, cl->state, | |
121 | cl->reading_state, cl->writing_state); | |
122 | i++; | |
123 | } | |
124 | out: | |
125 | mutex_unlock(&dev->device_lock); | |
126 | ret = simple_read_from_buffer(ubuf, cnt, ppos, buf, pos); | |
127 | kfree(buf); | |
128 | return ret; | |
129 | } | |
130 | ||
131 | static const struct file_operations mei_dbgfs_fops_active = { | |
132 | .open = simple_open, | |
133 | .read = mei_dbgfs_read_active, | |
134 | .llseek = generic_file_llseek, | |
135 | }; | |
136 | ||
30e53bb8 TW |
137 | static ssize_t mei_dbgfs_read_devstate(struct file *fp, char __user *ubuf, |
138 | size_t cnt, loff_t *ppos) | |
139 | { | |
140 | struct mei_device *dev = fp->private_data; | |
141 | const size_t bufsz = 1024; | |
142 | char *buf = kzalloc(bufsz, GFP_KERNEL); | |
143 | int pos = 0; | |
144 | int ret; | |
145 | ||
146 | if (!buf) | |
147 | return -ENOMEM; | |
148 | ||
1beeb4b9 | 149 | pos += scnprintf(buf + pos, bufsz - pos, "dev: %s\n", |
30e53bb8 | 150 | mei_dev_state_str(dev->dev_state)); |
1beeb4b9 AU |
151 | pos += scnprintf(buf + pos, bufsz - pos, "hbm: %s\n", |
152 | mei_hbm_state_str(dev->hbm_state)); | |
153 | pos += scnprintf(buf + pos, bufsz - pos, "pg: %s, %s\n", | |
154 | mei_pg_is_enabled(dev) ? "ENABLED" : "DISABLED", | |
155 | mei_pg_state_str(mei_pg_state(dev))); | |
30e53bb8 TW |
156 | ret = simple_read_from_buffer(ubuf, cnt, ppos, buf, pos); |
157 | kfree(buf); | |
158 | return ret; | |
159 | } | |
160 | static const struct file_operations mei_dbgfs_fops_devstate = { | |
a42f82f5 | 161 | .open = simple_open, |
30e53bb8 TW |
162 | .read = mei_dbgfs_read_devstate, |
163 | .llseek = generic_file_llseek, | |
164 | }; | |
165 | ||
166 | /** | |
167 | * mei_dbgfs_deregister - Remove the debugfs files and directories | |
a8605ea2 AU |
168 | * |
169 | * @dev: the mei device structure | |
30e53bb8 TW |
170 | */ |
171 | void mei_dbgfs_deregister(struct mei_device *dev) | |
172 | { | |
173 | if (!dev->dbgfs_dir) | |
174 | return; | |
175 | debugfs_remove_recursive(dev->dbgfs_dir); | |
176 | dev->dbgfs_dir = NULL; | |
177 | } | |
178 | ||
179 | /** | |
a8605ea2 | 180 | * mei_dbgfs_register - Add the debugfs files |
30e53bb8 | 181 | * |
a8605ea2 AU |
182 | * @dev: the mei device structure |
183 | * @name: the mei device name | |
ce23139c AU |
184 | * |
185 | * Return: 0 on success, <0 on failure. | |
30e53bb8 TW |
186 | */ |
187 | int mei_dbgfs_register(struct mei_device *dev, const char *name) | |
188 | { | |
189 | struct dentry *dir, *f; | |
92db1555 | 190 | |
30e53bb8 TW |
191 | dir = debugfs_create_dir(name, NULL); |
192 | if (!dir) | |
193 | return -ENOMEM; | |
194 | ||
195 | f = debugfs_create_file("meclients", S_IRUSR, dir, | |
196 | dev, &mei_dbgfs_fops_meclients); | |
197 | if (!f) { | |
2bf94cab | 198 | dev_err(dev->dev, "meclients: registration failed\n"); |
30e53bb8 TW |
199 | goto err; |
200 | } | |
5baaf71f TW |
201 | f = debugfs_create_file("active", S_IRUSR, dir, |
202 | dev, &mei_dbgfs_fops_active); | |
203 | if (!f) { | |
2bf94cab | 204 | dev_err(dev->dev, "meclients: registration failed\n"); |
5baaf71f TW |
205 | goto err; |
206 | } | |
30e53bb8 TW |
207 | f = debugfs_create_file("devstate", S_IRUSR, dir, |
208 | dev, &mei_dbgfs_fops_devstate); | |
209 | if (!f) { | |
2bf94cab | 210 | dev_err(dev->dev, "devstate: registration failed\n"); |
30e53bb8 TW |
211 | goto err; |
212 | } | |
213 | dev->dbgfs_dir = dir; | |
214 | return 0; | |
215 | err: | |
216 | mei_dbgfs_deregister(dev); | |
217 | return -ENODEV; | |
218 | } | |
219 |