2 * Copyright (c) 2008-2011 Atheros Communications Inc.
3 * Copyright (c) 2011 Neratec Solutions AG
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.
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.
18 #include <linux/debugfs.h>
19 #include <linux/export.h>
22 #include "dfs_debug.h"
25 struct ath_dfs_pool_stats global_dfs_pool_stats = { 0 };
27 #define ATH9K_DFS_STAT(s, p) \
28 len += scnprintf(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 += scnprintf(buf + len, size - len, "%28s : %10u\n", s, \
32 global_dfs_pool_stats.p);
34 static ssize_t read_file_dfs(struct file *file, char __user *user_buf,
35 size_t count, loff_t *ppos)
37 struct ath_softc *sc = file->private_data;
38 struct ath9k_hw_version *hw_ver = &sc->sc_ah->hw_version;
40 unsigned int len = 0, size = 8000;
43 buf = kzalloc(size, GFP_KERNEL);
47 len += scnprintf(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 += scnprintf(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 += scnprintf(buf + len, size - len, "Radar detector statistics "
63 "(current DFS region: %d)\n",
64 sc->dfs_detector->region);
65 ATH9K_DFS_STAT("Pulse events processed ", pulses_processed);
66 ATH9K_DFS_STAT("Radars detected ", radar_detected);
67 len += scnprintf(buf + len, size - len, "Global Pool statistics:\n");
68 ATH9K_DFS_POOL_STAT("Pool references ", pool_reference);
69 ATH9K_DFS_POOL_STAT("Pulses allocated ", pulse_allocated);
70 ATH9K_DFS_POOL_STAT("Pulses alloc error ", pulse_alloc_error);
71 ATH9K_DFS_POOL_STAT("Pulses in use ", pulse_used);
72 ATH9K_DFS_POOL_STAT("Seqs. allocated ", pseq_allocated);
73 ATH9K_DFS_POOL_STAT("Seqs. alloc error ", pseq_alloc_error);
74 ATH9K_DFS_POOL_STAT("Seqs. in use ", pseq_used);
79 retval = simple_read_from_buffer(user_buf, count, ppos, buf, len);
85 /* magic number to prevent accidental reset of DFS statistics */
86 #define DFS_STATS_RESET_MAGIC 0x80000000
87 static ssize_t write_file_dfs(struct file *file, const char __user *user_buf,
88 size_t count, loff_t *ppos)
90 struct ath_softc *sc = file->private_data;
95 len = min(count, sizeof(buf) - 1);
96 if (copy_from_user(buf, user_buf, len))
100 if (kstrtoul(buf, 0, &val))
103 if (val == DFS_STATS_RESET_MAGIC)
104 memset(&sc->debug.stats.dfs_stats, 0,
105 sizeof(sc->debug.stats.dfs_stats));
109 static ssize_t write_file_simulate_radar(struct file *file,
110 const char __user *user_buf,
111 size_t count, loff_t *ppos)
113 struct ath_softc *sc = file->private_data;
115 ieee80211_radar_detected(sc->hw);
120 static const struct file_operations fops_simulate_radar = {
121 .write = write_file_simulate_radar,
123 .owner = THIS_MODULE,
124 .llseek = default_llseek,
127 static const struct file_operations fops_dfs_stats = {
128 .read = read_file_dfs,
129 .write = write_file_dfs,
131 .owner = THIS_MODULE,
132 .llseek = default_llseek,
135 void ath9k_dfs_init_debug(struct ath_softc *sc)
137 debugfs_create_file("dfs_stats", S_IRUSR,
138 sc->debug.debugfs_phy, sc, &fops_dfs_stats);
139 debugfs_create_file("dfs_simulate_radar", S_IWUSR,
140 sc->debug.debugfs_phy, sc, &fops_simulate_radar);