Commit | Line | Data |
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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; | |
b7d88514 | 31 | struct mei_me_client *me_cl; |
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 | 40 | |
b7d88514 | 41 | down_read(&dev->me_clients_rwsem); |
c4495200 AU |
42 | list_for_each_entry(me_cl, &dev->me_clients, list) |
43 | bufsz++; | |
44 | ||
45 | bufsz *= sizeof(HDR) + 1; | |
46 | buf = kzalloc(bufsz, GFP_KERNEL); | |
47 | if (!buf) { | |
b7d88514 | 48 | up_read(&dev->me_clients_rwsem); |
c4495200 AU |
49 | return -ENOMEM; |
50 | } | |
51 | ||
52 | pos += scnprintf(buf + pos, bufsz - pos, HDR); | |
53 | ||
83ce0741 | 54 | /* if the driver is not enabled the list won't be consistent */ |
30e53bb8 TW |
55 | if (dev->dev_state != MEI_DEV_ENABLED) |
56 | goto out; | |
57 | ||
b7d88514 | 58 | list_for_each_entry(me_cl, &dev->me_clients, list) { |
30e53bb8 | 59 | |
b7d88514 | 60 | if (mei_me_cl_get(me_cl)) { |
79563db9 TW |
61 | pos += scnprintf(buf + pos, bufsz - pos, |
62 | "%2d|%2d|%3d|%pUl|%3d|%7d|%2d|%4d|\n", | |
63 | i++, me_cl->client_id, | |
64 | me_cl->props.fixed_address, | |
65 | &me_cl->props.protocol_name, | |
66 | me_cl->props.max_number_of_connections, | |
67 | me_cl->props.max_msg_length, | |
68 | me_cl->props.single_recv_buf, | |
69 | atomic_read(&me_cl->refcnt.refcount)); | |
79563db9 | 70 | |
b7d88514 TW |
71 | mei_me_cl_put(me_cl); |
72 | } | |
30e53bb8 | 73 | } |
b7d88514 | 74 | |
30e53bb8 | 75 | out: |
b7d88514 | 76 | up_read(&dev->me_clients_rwsem); |
30e53bb8 TW |
77 | ret = simple_read_from_buffer(ubuf, cnt, ppos, buf, pos); |
78 | kfree(buf); | |
79 | return ret; | |
80 | } | |
81 | ||
82 | static const struct file_operations mei_dbgfs_fops_meclients = { | |
a42f82f5 | 83 | .open = simple_open, |
30e53bb8 TW |
84 | .read = mei_dbgfs_read_meclients, |
85 | .llseek = generic_file_llseek, | |
86 | }; | |
87 | ||
5baaf71f TW |
88 | static ssize_t mei_dbgfs_read_active(struct file *fp, char __user *ubuf, |
89 | size_t cnt, loff_t *ppos) | |
90 | { | |
91 | struct mei_device *dev = fp->private_data; | |
92 | struct mei_cl *cl; | |
93 | const size_t bufsz = 1024; | |
94 | char *buf; | |
95 | int i = 0; | |
96 | int pos = 0; | |
97 | int ret; | |
98 | ||
99 | if (!dev) | |
100 | return -ENODEV; | |
101 | ||
102 | buf = kzalloc(bufsz, GFP_KERNEL); | |
103 | if (!buf) | |
104 | return -ENOMEM; | |
105 | ||
106 | pos += scnprintf(buf + pos, bufsz - pos, | |
107 | " |me|host|state|rd|wr|\n"); | |
108 | ||
109 | mutex_lock(&dev->device_lock); | |
110 | ||
0a01e974 | 111 | /* if the driver is not enabled the list won't be consistent */ |
5baaf71f TW |
112 | if (dev->dev_state != MEI_DEV_ENABLED) |
113 | goto out; | |
114 | ||
115 | list_for_each_entry(cl, &dev->file_list, link) { | |
116 | ||
117 | pos += scnprintf(buf + pos, bufsz - pos, | |
118 | "%2d|%2d|%4d|%5d|%2d|%2d|\n", | |
d49ed64a | 119 | i, mei_cl_me_id(cl), cl->host_client_id, cl->state, |
a9bed610 | 120 | !list_empty(&cl->rd_completed), cl->writing_state); |
5baaf71f TW |
121 | i++; |
122 | } | |
123 | out: | |
124 | mutex_unlock(&dev->device_lock); | |
125 | ret = simple_read_from_buffer(ubuf, cnt, ppos, buf, pos); | |
126 | kfree(buf); | |
127 | return ret; | |
128 | } | |
129 | ||
130 | static const struct file_operations mei_dbgfs_fops_active = { | |
131 | .open = simple_open, | |
132 | .read = mei_dbgfs_read_active, | |
133 | .llseek = generic_file_llseek, | |
134 | }; | |
135 | ||
30e53bb8 TW |
136 | static ssize_t mei_dbgfs_read_devstate(struct file *fp, char __user *ubuf, |
137 | size_t cnt, loff_t *ppos) | |
138 | { | |
139 | struct mei_device *dev = fp->private_data; | |
140 | const size_t bufsz = 1024; | |
141 | char *buf = kzalloc(bufsz, GFP_KERNEL); | |
142 | int pos = 0; | |
143 | int ret; | |
144 | ||
145 | if (!buf) | |
146 | return -ENOMEM; | |
147 | ||
1beeb4b9 | 148 | pos += scnprintf(buf + pos, bufsz - pos, "dev: %s\n", |
30e53bb8 | 149 | mei_dev_state_str(dev->dev_state)); |
1beeb4b9 AU |
150 | pos += scnprintf(buf + pos, bufsz - pos, "hbm: %s\n", |
151 | mei_hbm_state_str(dev->hbm_state)); | |
5b20a028 TW |
152 | |
153 | if (dev->hbm_state == MEI_HBM_STARTED) { | |
154 | pos += scnprintf(buf + pos, bufsz - pos, "hbm features:\n"); | |
155 | pos += scnprintf(buf + pos, bufsz - pos, "\tPG: %01d\n", | |
156 | dev->hbm_f_pg_supported); | |
157 | } | |
158 | ||
1beeb4b9 AU |
159 | pos += scnprintf(buf + pos, bufsz - pos, "pg: %s, %s\n", |
160 | mei_pg_is_enabled(dev) ? "ENABLED" : "DISABLED", | |
161 | mei_pg_state_str(mei_pg_state(dev))); | |
30e53bb8 TW |
162 | ret = simple_read_from_buffer(ubuf, cnt, ppos, buf, pos); |
163 | kfree(buf); | |
164 | return ret; | |
165 | } | |
166 | static const struct file_operations mei_dbgfs_fops_devstate = { | |
a42f82f5 | 167 | .open = simple_open, |
30e53bb8 TW |
168 | .read = mei_dbgfs_read_devstate, |
169 | .llseek = generic_file_llseek, | |
170 | }; | |
171 | ||
172 | /** | |
173 | * mei_dbgfs_deregister - Remove the debugfs files and directories | |
a8605ea2 AU |
174 | * |
175 | * @dev: the mei device structure | |
30e53bb8 TW |
176 | */ |
177 | void mei_dbgfs_deregister(struct mei_device *dev) | |
178 | { | |
179 | if (!dev->dbgfs_dir) | |
180 | return; | |
181 | debugfs_remove_recursive(dev->dbgfs_dir); | |
182 | dev->dbgfs_dir = NULL; | |
183 | } | |
184 | ||
185 | /** | |
a8605ea2 | 186 | * mei_dbgfs_register - Add the debugfs files |
30e53bb8 | 187 | * |
a8605ea2 AU |
188 | * @dev: the mei device structure |
189 | * @name: the mei device name | |
ce23139c AU |
190 | * |
191 | * Return: 0 on success, <0 on failure. | |
30e53bb8 TW |
192 | */ |
193 | int mei_dbgfs_register(struct mei_device *dev, const char *name) | |
194 | { | |
195 | struct dentry *dir, *f; | |
92db1555 | 196 | |
30e53bb8 TW |
197 | dir = debugfs_create_dir(name, NULL); |
198 | if (!dir) | |
199 | return -ENOMEM; | |
200 | ||
201 | f = debugfs_create_file("meclients", S_IRUSR, dir, | |
202 | dev, &mei_dbgfs_fops_meclients); | |
203 | if (!f) { | |
2bf94cab | 204 | dev_err(dev->dev, "meclients: registration failed\n"); |
30e53bb8 TW |
205 | goto err; |
206 | } | |
5baaf71f TW |
207 | f = debugfs_create_file("active", S_IRUSR, dir, |
208 | dev, &mei_dbgfs_fops_active); | |
209 | if (!f) { | |
2bf94cab | 210 | dev_err(dev->dev, "meclients: registration failed\n"); |
5baaf71f TW |
211 | goto err; |
212 | } | |
30e53bb8 TW |
213 | f = debugfs_create_file("devstate", S_IRUSR, dir, |
214 | dev, &mei_dbgfs_fops_devstate); | |
215 | if (!f) { | |
2bf94cab | 216 | dev_err(dev->dev, "devstate: registration failed\n"); |
30e53bb8 TW |
217 | goto err; |
218 | } | |
eeabfcf5 AU |
219 | f = debugfs_create_bool("allow_fixed_address", S_IRUSR | S_IWUSR, dir, |
220 | &dev->allow_fixed_address); | |
221 | if (!f) { | |
222 | dev_err(dev->dev, "allow_fixed_address: registration failed\n"); | |
223 | goto err; | |
224 | } | |
30e53bb8 TW |
225 | dev->dbgfs_dir = dir; |
226 | return 0; | |
227 | err: | |
228 | mei_dbgfs_deregister(dev); | |
229 | return -ENODEV; | |
230 | } | |
231 |