• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
1 /*
2  * Copyright (c) 2008-2011 Atheros Communications Inc.
3  * Copyright (c) 2011 Neratec Solutions AG
4  *
5  * Permission to use, copy, modify, and/or distribute this software for any
6  * purpose with or without fee is hereby granted, provided that the above
7  * copyright notice and this permission notice appear in all copies.
8  *
9  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16  */
17 
18 #include <linux/debugfs.h>
19 #include <linux/export.h>
20 
21 #include "ath9k.h"
22 #include "dfs_debug.h"
23 
24 
25 struct ath_dfs_pool_stats global_dfs_pool_stats = { 0 };
26 
27 #define ATH9K_DFS_STAT(s, p) \
28 	len += snprintf(buf + len, size - len, "%28s : %10u\n", s, \
29 			sc->debug.stats.dfs_stats.p);
30 #define ATH9K_DFS_POOL_STAT(s, p) \
31 	len += snprintf(buf + len, size - len, "%28s : %10u\n", s, \
32 			global_dfs_pool_stats.p);
33 
read_file_dfs(struct file * file,char __user * user_buf,size_t count,loff_t * ppos)34 static ssize_t read_file_dfs(struct file *file, char __user *user_buf,
35 			     size_t count, loff_t *ppos)
36 {
37 	struct ath_softc *sc = file->private_data;
38 	struct ath9k_hw_version *hw_ver = &sc->sc_ah->hw_version;
39 	char *buf;
40 	unsigned int len = 0, size = 8000;
41 	ssize_t retval = 0;
42 
43 	buf = kzalloc(size, GFP_KERNEL);
44 	if (buf == NULL)
45 		return -ENOMEM;
46 
47 	len += snprintf(buf + len, size - len, "DFS support for "
48 			"macVersion = 0x%x, macRev = 0x%x: %s\n",
49 			hw_ver->macVersion, hw_ver->macRev,
50 			(sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_DFS) ?
51 					"enabled" : "disabled");
52 	len += snprintf(buf + len, size - len, "Pulse detector statistics:\n");
53 	ATH9K_DFS_STAT("pulse events reported   ", pulses_total);
54 	ATH9K_DFS_STAT("invalid pulse events    ", pulses_no_dfs);
55 	ATH9K_DFS_STAT("DFS pulses detected     ", pulses_detected);
56 	ATH9K_DFS_STAT("Datalen discards        ", datalen_discards);
57 	ATH9K_DFS_STAT("RSSI discards           ", rssi_discards);
58 	ATH9K_DFS_STAT("BW info discards        ", bwinfo_discards);
59 	ATH9K_DFS_STAT("Primary channel pulses  ", pri_phy_errors);
60 	ATH9K_DFS_STAT("Secondary channel pulses", ext_phy_errors);
61 	ATH9K_DFS_STAT("Dual channel pulses     ", dc_phy_errors);
62 	len += snprintf(buf + len, size - len, "Radar detector statistics "
63 			"(current DFS region: %d)\n", sc->dfs_detector->region);
64 	ATH9K_DFS_STAT("Pulse events processed  ", pulses_processed);
65 	ATH9K_DFS_STAT("Radars detected         ", radar_detected);
66 	len += snprintf(buf + len, size - len, "Global Pool statistics:\n");
67 	ATH9K_DFS_POOL_STAT("Pool references         ", pool_reference);
68 	ATH9K_DFS_POOL_STAT("Pulses allocated        ", pulse_allocated);
69 	ATH9K_DFS_POOL_STAT("Pulses alloc error      ", pulse_alloc_error);
70 	ATH9K_DFS_POOL_STAT("Pulses in use           ", pulse_used);
71 	ATH9K_DFS_POOL_STAT("Seqs. allocated         ", pseq_allocated);
72 	ATH9K_DFS_POOL_STAT("Seqs. alloc error       ", pseq_alloc_error);
73 	ATH9K_DFS_POOL_STAT("Seqs. in use            ", pseq_used);
74 
75 	if (len > size)
76 		len = size;
77 
78 	retval = simple_read_from_buffer(user_buf, count, ppos, buf, len);
79 	kfree(buf);
80 
81 	return retval;
82 }
83 
84 /* magic number to prevent accidental reset of DFS statistics */
85 #define DFS_STATS_RESET_MAGIC	0x80000000
write_file_dfs(struct file * file,const char __user * user_buf,size_t count,loff_t * ppos)86 static ssize_t write_file_dfs(struct file *file, const char __user *user_buf,
87 			      size_t count, loff_t *ppos)
88 {
89 	struct ath_softc *sc = file->private_data;
90 	unsigned long val;
91 	char buf[32];
92 	ssize_t len;
93 
94 	len = min(count, sizeof(buf) - 1);
95 	if (copy_from_user(buf, user_buf, len))
96 		return -EFAULT;
97 
98 	buf[len] = '\0';
99 	if (strict_strtoul(buf, 0, &val))
100 		return -EINVAL;
101 
102 	if (val == DFS_STATS_RESET_MAGIC)
103 		memset(&sc->debug.stats.dfs_stats, 0,
104 		       sizeof(sc->debug.stats.dfs_stats));
105 	return count;
106 }
107 
write_file_simulate_radar(struct file * file,const char __user * user_buf,size_t count,loff_t * ppos)108 static ssize_t write_file_simulate_radar(struct file *file,
109 					 const char __user *user_buf,
110 					 size_t count, loff_t *ppos)
111 {
112 	struct ath_softc *sc = file->private_data;
113 
114 	ieee80211_radar_detected(sc->hw);
115 
116 	return count;
117 }
118 
119 static const struct file_operations fops_simulate_radar = {
120 	.write = write_file_simulate_radar,
121 	.open = simple_open,
122 	.owner = THIS_MODULE,
123 	.llseek = default_llseek,
124 };
125 
126 static const struct file_operations fops_dfs_stats = {
127 	.read = read_file_dfs,
128 	.write = write_file_dfs,
129 	.open = simple_open,
130 	.owner = THIS_MODULE,
131 	.llseek = default_llseek,
132 };
133 
ath9k_dfs_init_debug(struct ath_softc * sc)134 void ath9k_dfs_init_debug(struct ath_softc *sc)
135 {
136 	debugfs_create_file("dfs_stats", S_IRUSR,
137 			    sc->debug.debugfs_phy, sc, &fops_dfs_stats);
138 	debugfs_create_file("dfs_simulate_radar", S_IWUSR,
139 			    sc->debug.debugfs_phy, sc, &fops_simulate_radar);
140 }
141