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04672fe6 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
c71228ca IPG |
2 | /* |
3 | * Intel Wireless WiMAX Connection 2400m | |
4 | * Debugfs interfaces to manipulate driver and device information | |
5 | * | |
c71228ca IPG |
6 | * Copyright (C) 2007 Intel Corporation <linux-wimax@intel.com> |
7 | * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com> | |
c71228ca IPG |
8 | */ |
9 | ||
10 | #include <linux/debugfs.h> | |
11 | #include <linux/netdevice.h> | |
12 | #include <linux/etherdevice.h> | |
13 | #include <linux/spinlock.h> | |
14 | #include <linux/device.h> | |
ee40fa06 | 15 | #include <linux/export.h> |
c71228ca IPG |
16 | #include "i2400m.h" |
17 | ||
18 | ||
19 | #define D_SUBMODULE debugfs | |
20 | #include "debug-levels.h" | |
21 | ||
22 | static | |
23 | int debugfs_netdev_queue_stopped_get(void *data, u64 *val) | |
24 | { | |
25 | struct i2400m *i2400m = data; | |
26 | *val = netif_queue_stopped(i2400m->wimax_dev.net_dev); | |
27 | return 0; | |
28 | } | |
29 | DEFINE_SIMPLE_ATTRIBUTE(fops_netdev_queue_stopped, | |
30 | debugfs_netdev_queue_stopped_get, | |
31 | NULL, "%llu\n"); | |
32 | ||
33 | ||
34 | static | |
35 | struct dentry *debugfs_create_netdev_queue_stopped( | |
36 | const char *name, struct dentry *parent, struct i2400m *i2400m) | |
37 | { | |
38 | return debugfs_create_file(name, 0400, parent, i2400m, | |
39 | &fops_netdev_queue_stopped); | |
40 | } | |
41 | ||
c71228ca IPG |
42 | /* |
43 | * We don't allow partial reads of this file, as then the reader would | |
44 | * get weirdly confused data as it is updated. | |
45 | * | |
46 | * So or you read it all or nothing; if you try to read with an offset | |
47 | * != 0, we consider you are done reading. | |
48 | */ | |
49 | static | |
50 | ssize_t i2400m_rx_stats_read(struct file *filp, char __user *buffer, | |
51 | size_t count, loff_t *ppos) | |
52 | { | |
53 | struct i2400m *i2400m = filp->private_data; | |
54 | char buf[128]; | |
55 | unsigned long flags; | |
56 | ||
57 | if (*ppos != 0) | |
58 | return 0; | |
59 | if (count < sizeof(buf)) | |
60 | return -ENOSPC; | |
61 | spin_lock_irqsave(&i2400m->rx_lock, flags); | |
62 | snprintf(buf, sizeof(buf), "%u %u %u %u %u %u %u\n", | |
63 | i2400m->rx_pl_num, i2400m->rx_pl_min, | |
64 | i2400m->rx_pl_max, i2400m->rx_num, | |
65 | i2400m->rx_size_acc, | |
66 | i2400m->rx_size_min, i2400m->rx_size_max); | |
67 | spin_unlock_irqrestore(&i2400m->rx_lock, flags); | |
68 | return simple_read_from_buffer(buffer, count, ppos, buf, strlen(buf)); | |
69 | } | |
70 | ||
71 | ||
72 | /* Any write clears the stats */ | |
73 | static | |
74 | ssize_t i2400m_rx_stats_write(struct file *filp, const char __user *buffer, | |
75 | size_t count, loff_t *ppos) | |
76 | { | |
77 | struct i2400m *i2400m = filp->private_data; | |
78 | unsigned long flags; | |
79 | ||
80 | spin_lock_irqsave(&i2400m->rx_lock, flags); | |
81 | i2400m->rx_pl_num = 0; | |
82 | i2400m->rx_pl_max = 0; | |
83 | i2400m->rx_pl_min = UINT_MAX; | |
84 | i2400m->rx_num = 0; | |
85 | i2400m->rx_size_acc = 0; | |
86 | i2400m->rx_size_min = UINT_MAX; | |
87 | i2400m->rx_size_max = 0; | |
88 | spin_unlock_irqrestore(&i2400m->rx_lock, flags); | |
89 | return count; | |
90 | } | |
91 | ||
92 | static | |
93 | const struct file_operations i2400m_rx_stats_fops = { | |
94 | .owner = THIS_MODULE, | |
234e3405 | 95 | .open = simple_open, |
c71228ca IPG |
96 | .read = i2400m_rx_stats_read, |
97 | .write = i2400m_rx_stats_write, | |
6038f373 | 98 | .llseek = default_llseek, |
c71228ca IPG |
99 | }; |
100 | ||
101 | ||
102 | /* See i2400m_rx_stats_read() */ | |
103 | static | |
104 | ssize_t i2400m_tx_stats_read(struct file *filp, char __user *buffer, | |
105 | size_t count, loff_t *ppos) | |
106 | { | |
107 | struct i2400m *i2400m = filp->private_data; | |
108 | char buf[128]; | |
109 | unsigned long flags; | |
110 | ||
111 | if (*ppos != 0) | |
112 | return 0; | |
113 | if (count < sizeof(buf)) | |
114 | return -ENOSPC; | |
115 | spin_lock_irqsave(&i2400m->tx_lock, flags); | |
116 | snprintf(buf, sizeof(buf), "%u %u %u %u %u %u %u\n", | |
117 | i2400m->tx_pl_num, i2400m->tx_pl_min, | |
118 | i2400m->tx_pl_max, i2400m->tx_num, | |
119 | i2400m->tx_size_acc, | |
120 | i2400m->tx_size_min, i2400m->tx_size_max); | |
121 | spin_unlock_irqrestore(&i2400m->tx_lock, flags); | |
122 | return simple_read_from_buffer(buffer, count, ppos, buf, strlen(buf)); | |
123 | } | |
124 | ||
125 | /* Any write clears the stats */ | |
126 | static | |
127 | ssize_t i2400m_tx_stats_write(struct file *filp, const char __user *buffer, | |
128 | size_t count, loff_t *ppos) | |
129 | { | |
130 | struct i2400m *i2400m = filp->private_data; | |
131 | unsigned long flags; | |
132 | ||
133 | spin_lock_irqsave(&i2400m->tx_lock, flags); | |
134 | i2400m->tx_pl_num = 0; | |
135 | i2400m->tx_pl_max = 0; | |
136 | i2400m->tx_pl_min = UINT_MAX; | |
137 | i2400m->tx_num = 0; | |
138 | i2400m->tx_size_acc = 0; | |
139 | i2400m->tx_size_min = UINT_MAX; | |
140 | i2400m->tx_size_max = 0; | |
141 | spin_unlock_irqrestore(&i2400m->tx_lock, flags); | |
142 | return count; | |
143 | } | |
144 | ||
145 | static | |
146 | const struct file_operations i2400m_tx_stats_fops = { | |
147 | .owner = THIS_MODULE, | |
234e3405 | 148 | .open = simple_open, |
c71228ca IPG |
149 | .read = i2400m_tx_stats_read, |
150 | .write = i2400m_tx_stats_write, | |
6038f373 | 151 | .llseek = default_llseek, |
c71228ca IPG |
152 | }; |
153 | ||
154 | ||
155 | /* Write 1 to ask the device to go into suspend */ | |
156 | static | |
157 | int debugfs_i2400m_suspend_set(void *data, u64 val) | |
158 | { | |
159 | int result; | |
160 | struct i2400m *i2400m = data; | |
161 | result = i2400m_cmd_enter_powersave(i2400m); | |
162 | if (result >= 0) | |
163 | result = 0; | |
164 | return result; | |
165 | } | |
166 | DEFINE_SIMPLE_ATTRIBUTE(fops_i2400m_suspend, | |
167 | NULL, debugfs_i2400m_suspend_set, | |
168 | "%llu\n"); | |
169 | ||
170 | static | |
171 | struct dentry *debugfs_create_i2400m_suspend( | |
172 | const char *name, struct dentry *parent, struct i2400m *i2400m) | |
173 | { | |
174 | return debugfs_create_file(name, 0200, parent, i2400m, | |
175 | &fops_i2400m_suspend); | |
176 | } | |
177 | ||
178 | ||
179 | /* | |
180 | * Reset the device | |
181 | * | |
182 | * Write 0 to ask the device to soft reset, 1 to cold reset, 2 to bus | |
183 | * reset (as defined by enum i2400m_reset_type). | |
184 | */ | |
185 | static | |
186 | int debugfs_i2400m_reset_set(void *data, u64 val) | |
187 | { | |
188 | int result; | |
189 | struct i2400m *i2400m = data; | |
190 | enum i2400m_reset_type rt = val; | |
191 | switch(rt) { | |
192 | case I2400M_RT_WARM: | |
193 | case I2400M_RT_COLD: | |
194 | case I2400M_RT_BUS: | |
c931ceeb | 195 | result = i2400m_reset(i2400m, rt); |
c71228ca IPG |
196 | if (result >= 0) |
197 | result = 0; | |
01872c64 | 198 | break; |
c71228ca IPG |
199 | default: |
200 | result = -EINVAL; | |
201 | } | |
202 | return result; | |
203 | } | |
204 | DEFINE_SIMPLE_ATTRIBUTE(fops_i2400m_reset, | |
205 | NULL, debugfs_i2400m_reset_set, | |
206 | "%llu\n"); | |
207 | ||
208 | static | |
209 | struct dentry *debugfs_create_i2400m_reset( | |
210 | const char *name, struct dentry *parent, struct i2400m *i2400m) | |
211 | { | |
212 | return debugfs_create_file(name, 0200, parent, i2400m, | |
213 | &fops_i2400m_reset); | |
214 | } | |
215 | ||
c71228ca IPG |
216 | |
217 | #define __debugfs_register(prefix, name, parent) \ | |
218 | do { \ | |
219 | result = d_level_register_debugfs(prefix, name, parent); \ | |
220 | if (result < 0) \ | |
221 | goto error; \ | |
222 | } while (0) | |
223 | ||
224 | ||
225 | int i2400m_debugfs_add(struct i2400m *i2400m) | |
226 | { | |
227 | int result; | |
228 | struct device *dev = i2400m_dev(i2400m); | |
229 | struct dentry *dentry = i2400m->wimax_dev.debugfs_dentry; | |
230 | struct dentry *fd; | |
231 | ||
232 | dentry = debugfs_create_dir("i2400m", dentry); | |
233 | result = PTR_ERR(dentry); | |
234 | if (IS_ERR(dentry)) { | |
235 | if (result == -ENODEV) | |
236 | result = 0; /* No debugfs support */ | |
237 | goto error; | |
238 | } | |
239 | i2400m->debugfs_dentry = dentry; | |
240 | __debugfs_register("dl_", control, dentry); | |
241 | __debugfs_register("dl_", driver, dentry); | |
242 | __debugfs_register("dl_", debugfs, dentry); | |
243 | __debugfs_register("dl_", fw, dentry); | |
244 | __debugfs_register("dl_", netdev, dentry); | |
245 | __debugfs_register("dl_", rfkill, dentry); | |
246 | __debugfs_register("dl_", rx, dentry); | |
247 | __debugfs_register("dl_", tx, dentry); | |
248 | ||
249 | fd = debugfs_create_size_t("tx_in", 0400, dentry, | |
250 | &i2400m->tx_in); | |
251 | result = PTR_ERR(fd); | |
252 | if (IS_ERR(fd) && result != -ENODEV) { | |
253 | dev_err(dev, "Can't create debugfs entry " | |
254 | "tx_in: %d\n", result); | |
255 | goto error; | |
256 | } | |
257 | ||
258 | fd = debugfs_create_size_t("tx_out", 0400, dentry, | |
259 | &i2400m->tx_out); | |
260 | result = PTR_ERR(fd); | |
261 | if (IS_ERR(fd) && result != -ENODEV) { | |
262 | dev_err(dev, "Can't create debugfs entry " | |
263 | "tx_out: %d\n", result); | |
264 | goto error; | |
265 | } | |
266 | ||
267 | fd = debugfs_create_u32("state", 0600, dentry, | |
268 | &i2400m->state); | |
269 | result = PTR_ERR(fd); | |
270 | if (IS_ERR(fd) && result != -ENODEV) { | |
271 | dev_err(dev, "Can't create debugfs entry " | |
272 | "state: %d\n", result); | |
273 | goto error; | |
274 | } | |
275 | ||
276 | /* | |
277 | * Trace received messages from user space | |
278 | * | |
279 | * In order to tap the bidirectional message stream in the | |
280 | * 'msg' pipe, user space can read from the 'msg' pipe; | |
281 | * however, due to limitations in libnl, we can't know what | |
282 | * the different applications are sending down to the kernel. | |
283 | * | |
284 | * So we have this hack where the driver will echo any message | |
285 | * received on the msg pipe from user space [through a call to | |
286 | * wimax_dev->op_msg_from_user() into | |
287 | * i2400m_op_msg_from_user()] into the 'trace' pipe that this | |
288 | * driver creates. | |
289 | * | |
290 | * So then, reading from both the 'trace' and 'msg' pipes in | |
291 | * user space will provide a full dump of the traffic. | |
292 | * | |
293 | * Write 1 to activate, 0 to clear. | |
294 | * | |
295 | * It is not really very atomic, but it is also not too | |
296 | * critical. | |
297 | */ | |
298 | fd = debugfs_create_u8("trace_msg_from_user", 0600, dentry, | |
299 | &i2400m->trace_msg_from_user); | |
300 | result = PTR_ERR(fd); | |
301 | if (IS_ERR(fd) && result != -ENODEV) { | |
302 | dev_err(dev, "Can't create debugfs entry " | |
303 | "trace_msg_from_user: %d\n", result); | |
304 | goto error; | |
305 | } | |
306 | ||
307 | fd = debugfs_create_netdev_queue_stopped("netdev_queue_stopped", | |
308 | dentry, i2400m); | |
309 | result = PTR_ERR(fd); | |
310 | if (IS_ERR(fd) && result != -ENODEV) { | |
311 | dev_err(dev, "Can't create debugfs entry " | |
312 | "netdev_queue_stopped: %d\n", result); | |
313 | goto error; | |
314 | } | |
315 | ||
316 | fd = debugfs_create_file("rx_stats", 0600, dentry, i2400m, | |
317 | &i2400m_rx_stats_fops); | |
318 | result = PTR_ERR(fd); | |
319 | if (IS_ERR(fd) && result != -ENODEV) { | |
320 | dev_err(dev, "Can't create debugfs entry " | |
321 | "rx_stats: %d\n", result); | |
322 | goto error; | |
323 | } | |
324 | ||
325 | fd = debugfs_create_file("tx_stats", 0600, dentry, i2400m, | |
326 | &i2400m_tx_stats_fops); | |
327 | result = PTR_ERR(fd); | |
328 | if (IS_ERR(fd) && result != -ENODEV) { | |
329 | dev_err(dev, "Can't create debugfs entry " | |
330 | "tx_stats: %d\n", result); | |
331 | goto error; | |
332 | } | |
333 | ||
334 | fd = debugfs_create_i2400m_suspend("suspend", dentry, i2400m); | |
335 | result = PTR_ERR(fd); | |
336 | if (IS_ERR(fd) && result != -ENODEV) { | |
337 | dev_err(dev, "Can't create debugfs entry suspend: %d\n", | |
338 | result); | |
339 | goto error; | |
340 | } | |
341 | ||
342 | fd = debugfs_create_i2400m_reset("reset", dentry, i2400m); | |
343 | result = PTR_ERR(fd); | |
344 | if (IS_ERR(fd) && result != -ENODEV) { | |
345 | dev_err(dev, "Can't create debugfs entry reset: %d\n", result); | |
346 | goto error; | |
347 | } | |
348 | ||
349 | result = 0; | |
350 | error: | |
351 | return result; | |
352 | } | |
353 | ||
354 | void i2400m_debugfs_rm(struct i2400m *i2400m) | |
355 | { | |
356 | debugfs_remove_recursive(i2400m->debugfs_dentry); | |
357 | } |