1 // SPDX-License-Identifier: GPL-2.0-only
3 * Intel Wireless WiMAX Connection 2400m
4 * Debugfs interfaces to manipulate driver and device information
6 * Copyright (C) 2007 Intel Corporation <linux-wimax@intel.com>
7 * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
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>
15 #include <linux/export.h>
19 #define D_SUBMODULE debugfs
20 #include "debug-levels.h"
23 int debugfs_netdev_queue_stopped_get(void *data
, u64
*val
)
25 struct i2400m
*i2400m
= data
;
26 *val
= netif_queue_stopped(i2400m
->wimax_dev
.net_dev
);
29 DEFINE_SIMPLE_ATTRIBUTE(fops_netdev_queue_stopped
,
30 debugfs_netdev_queue_stopped_get
,
35 struct dentry
*debugfs_create_netdev_queue_stopped(
36 const char *name
, struct dentry
*parent
, struct i2400m
*i2400m
)
38 return debugfs_create_file(name
, 0400, parent
, i2400m
,
39 &fops_netdev_queue_stopped
);
43 * We don't allow partial reads of this file, as then the reader would
44 * get weirdly confused data as it is updated.
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.
50 ssize_t
i2400m_rx_stats_read(struct file
*filp
, char __user
*buffer
,
51 size_t count
, loff_t
*ppos
)
53 struct i2400m
*i2400m
= filp
->private_data
;
59 if (count
< sizeof(buf
))
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
,
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
));
72 /* Any write clears the stats */
74 ssize_t
i2400m_rx_stats_write(struct file
*filp
, const char __user
*buffer
,
75 size_t count
, loff_t
*ppos
)
77 struct i2400m
*i2400m
= filp
->private_data
;
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
;
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
);
93 const struct file_operations i2400m_rx_stats_fops
= {
96 .read
= i2400m_rx_stats_read
,
97 .write
= i2400m_rx_stats_write
,
98 .llseek
= default_llseek
,
102 /* See i2400m_rx_stats_read() */
104 ssize_t
i2400m_tx_stats_read(struct file
*filp
, char __user
*buffer
,
105 size_t count
, loff_t
*ppos
)
107 struct i2400m
*i2400m
= filp
->private_data
;
113 if (count
< sizeof(buf
))
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
,
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
));
125 /* Any write clears the stats */
127 ssize_t
i2400m_tx_stats_write(struct file
*filp
, const char __user
*buffer
,
128 size_t count
, loff_t
*ppos
)
130 struct i2400m
*i2400m
= filp
->private_data
;
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
;
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
);
146 const struct file_operations i2400m_tx_stats_fops
= {
147 .owner
= THIS_MODULE
,
149 .read
= i2400m_tx_stats_read
,
150 .write
= i2400m_tx_stats_write
,
151 .llseek
= default_llseek
,
155 /* Write 1 to ask the device to go into suspend */
157 int debugfs_i2400m_suspend_set(void *data
, u64 val
)
160 struct i2400m
*i2400m
= data
;
161 result
= i2400m_cmd_enter_powersave(i2400m
);
166 DEFINE_SIMPLE_ATTRIBUTE(fops_i2400m_suspend
,
167 NULL
, debugfs_i2400m_suspend_set
,
171 struct dentry
*debugfs_create_i2400m_suspend(
172 const char *name
, struct dentry
*parent
, struct i2400m
*i2400m
)
174 return debugfs_create_file(name
, 0200, parent
, i2400m
,
175 &fops_i2400m_suspend
);
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).
186 int debugfs_i2400m_reset_set(void *data
, u64 val
)
189 struct i2400m
*i2400m
= data
;
190 enum i2400m_reset_type rt
= val
;
195 result
= i2400m_reset(i2400m
, rt
);
204 DEFINE_SIMPLE_ATTRIBUTE(fops_i2400m_reset
,
205 NULL
, debugfs_i2400m_reset_set
,
209 struct dentry
*debugfs_create_i2400m_reset(
210 const char *name
, struct dentry
*parent
, struct i2400m
*i2400m
)
212 return debugfs_create_file(name
, 0200, parent
, i2400m
,
217 #define __debugfs_register(prefix, name, parent) \
219 result = d_level_register_debugfs(prefix, name, parent); \
225 int i2400m_debugfs_add(struct i2400m
*i2400m
)
228 struct device
*dev
= i2400m_dev(i2400m
);
229 struct dentry
*dentry
= i2400m
->wimax_dev
.debugfs_dentry
;
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 */
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
);
249 fd
= debugfs_create_size_t("tx_in", 0400, dentry
,
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
);
258 fd
= debugfs_create_size_t("tx_out", 0400, dentry
,
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
);
267 fd
= debugfs_create_u32("state", 0600, dentry
,
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
);
277 * Trace received messages from user space
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.
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
290 * So then, reading from both the 'trace' and 'msg' pipes in
291 * user space will provide a full dump of the traffic.
293 * Write 1 to activate, 0 to clear.
295 * It is not really very atomic, but it is also not too
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
);
307 fd
= debugfs_create_netdev_queue_stopped("netdev_queue_stopped",
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
);
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
);
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
);
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",
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
);
354 void i2400m_debugfs_rm(struct i2400m
*i2400m
)
356 debugfs_remove_recursive(i2400m
->debugfs_dentry
);