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29942bc1 ZK |
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 | ||
b96f20b3 ZK |
24 | |
25 | struct ath_dfs_pool_stats global_dfs_pool_stats = { 0 }; | |
26 | ||
29942bc1 ZK |
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); | |
b96f20b3 ZK |
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); | |
29942bc1 ZK |
33 | |
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"); | |
b96f20b3 ZK |
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); | |
29942bc1 ZK |
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); | |
b96f20b3 ZK |
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); | |
29942bc1 ZK |
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 | ||
b96f20b3 ZK |
84 | /* magic number to prevent accidental reset of DFS statistics */ |
85 | #define DFS_STATS_RESET_MAGIC 0x80000000 | |
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 | ||
29942bc1 ZK |
108 | static const struct file_operations fops_dfs_stats = { |
109 | .read = read_file_dfs, | |
b96f20b3 | 110 | .write = write_file_dfs, |
234e3405 | 111 | .open = simple_open, |
29942bc1 ZK |
112 | .owner = THIS_MODULE, |
113 | .llseek = default_llseek, | |
114 | }; | |
115 | ||
116 | void ath9k_dfs_init_debug(struct ath_softc *sc) | |
117 | { | |
118 | debugfs_create_file("dfs_stats", S_IRUSR, | |
119 | sc->debug.debugfs_phy, sc, &fops_dfs_stats); | |
120 | } |