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1/*2 * Copyright (c) 2008-2011 Atheros Communications Inc.3 * Copyright (c) 2011 Neratec Solutions AG4 *5 * Permission to use, copy, modify, and/or distribute this software for any6 * purpose with or without fee is hereby granted, provided that the above7 * copyright notice and this permission notice appear in all copies.8 *9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF15 * 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#include "../dfs_pattern_detector.h"24 25static struct ath_dfs_pool_stats dfs_pool_stats = { 0 };26 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 dfs_pool_stats.p);33 34static 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 += 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 53 if (!sc->dfs_detector) {54 len += scnprintf(buf + len, size - len,55 "DFS detector not enabled\n");56 goto exit;57 }58 59 dfs_pool_stats = sc->dfs_detector->get_stats(sc->dfs_detector);60 61 len += scnprintf(buf + len, size - len, "Pulse detector statistics:\n");62 ATH9K_DFS_STAT("pulse events reported ", pulses_total);63 ATH9K_DFS_STAT("invalid pulse events ", pulses_no_dfs);64 ATH9K_DFS_STAT("DFS pulses detected ", pulses_detected);65 ATH9K_DFS_STAT("Datalen discards ", datalen_discards);66 ATH9K_DFS_STAT("RSSI discards ", rssi_discards);67 ATH9K_DFS_STAT("BW info discards ", bwinfo_discards);68 ATH9K_DFS_STAT("Primary channel pulses ", pri_phy_errors);69 ATH9K_DFS_STAT("Secondary channel pulses", ext_phy_errors);70 ATH9K_DFS_STAT("Dual channel pulses ", dc_phy_errors);71 len += scnprintf(buf + len, size - len, "Radar detector statistics "72 "(current DFS region: %d)\n",73 sc->dfs_detector->region);74 ATH9K_DFS_STAT("Pulse events processed ", pulses_processed);75 ATH9K_DFS_STAT("Radars detected ", radar_detected);76 len += scnprintf(buf + len, size - len, "Global Pool statistics:\n");77 ATH9K_DFS_POOL_STAT("Pool references ", pool_reference);78 ATH9K_DFS_POOL_STAT("Pulses allocated ", pulse_allocated);79 ATH9K_DFS_POOL_STAT("Pulses alloc error ", pulse_alloc_error);80 ATH9K_DFS_POOL_STAT("Pulses in use ", pulse_used);81 ATH9K_DFS_POOL_STAT("Seqs. allocated ", pseq_allocated);82 ATH9K_DFS_POOL_STAT("Seqs. alloc error ", pseq_alloc_error);83 ATH9K_DFS_POOL_STAT("Seqs. in use ", pseq_used);84 85exit:86 if (len > size)87 len = size;88 89 retval = simple_read_from_buffer(user_buf, count, ppos, buf, len);90 kfree(buf);91 92 return retval;93}94 95/* magic number to prevent accidental reset of DFS statistics */96#define DFS_STATS_RESET_MAGIC 0x8000000097static ssize_t write_file_dfs(struct file *file, const char __user *user_buf,98 size_t count, loff_t *ppos)99{100 struct ath_softc *sc = file->private_data;101 unsigned long val;102 ssize_t ret;103 104 ret = kstrtoul_from_user(user_buf, count, 0, &val);105 if (ret)106 return ret;107 if (val == DFS_STATS_RESET_MAGIC)108 memset(&sc->debug.stats.dfs_stats, 0,109 sizeof(sc->debug.stats.dfs_stats));110 return count;111}112 113static ssize_t write_file_simulate_radar(struct file *file,114 const char __user *user_buf,115 size_t count, loff_t *ppos)116{117 struct ath_softc *sc = file->private_data;118 119 ieee80211_radar_detected(sc->hw, NULL);120 121 return count;122}123 124static const struct file_operations fops_simulate_radar = {125 .write = write_file_simulate_radar,126 .open = simple_open,127 .owner = THIS_MODULE,128 .llseek = default_llseek,129};130 131static const struct file_operations fops_dfs_stats = {132 .read = read_file_dfs,133 .write = write_file_dfs,134 .open = simple_open,135 .owner = THIS_MODULE,136 .llseek = default_llseek,137};138 139void ath9k_dfs_init_debug(struct ath_softc *sc)140{141 debugfs_create_file("dfs_stats", 0400,142 sc->debug.debugfs_phy, sc, &fops_dfs_stats);143 debugfs_create_file("dfs_simulate_radar", 0200,144 sc->debug.debugfs_phy, sc, &fops_simulate_radar);145}146