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 += 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); 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 += 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); 75 76 if (len > size) 77 len = size; 78 79 retval = simple_read_from_buffer(user_buf, count, ppos, buf, len); 80 kfree(buf); 81 82 return retval; 83 } 84 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) 89 { 90 struct ath_softc *sc = file->private_data; 91 unsigned long val; 92 char buf[32]; 93 ssize_t len; 94 95 len = min(count, sizeof(buf) - 1); 96 if (copy_from_user(buf, user_buf, len)) 97 return -EFAULT; 98 99 buf[len] = '\0'; 100 if (kstrtoul(buf, 0, &val)) 101 return -EINVAL; 102 103 if (val == DFS_STATS_RESET_MAGIC) 104 memset(&sc->debug.stats.dfs_stats, 0, 105 sizeof(sc->debug.stats.dfs_stats)); 106 return count; 107 } 108 109 static ssize_t write_file_simulate_radar(struct file *file, 110 const char __user *user_buf, 111 size_t count, loff_t *ppos) 112 { 113 struct ath_softc *sc = file->private_data; 114 115 ieee80211_radar_detected(sc->hw); 116 117 return count; 118 } 119 120 static const struct file_operations fops_simulate_radar = { 121 .write = write_file_simulate_radar, 122 .open = simple_open, 123 .owner = THIS_MODULE, 124 .llseek = default_llseek, 125 }; 126 127 static const struct file_operations fops_dfs_stats = { 128 .read = read_file_dfs, 129 .write = write_file_dfs, 130 .open = simple_open, 131 .owner = THIS_MODULE, 132 .llseek = default_llseek, 133 }; 134 135 void ath9k_dfs_init_debug(struct ath_softc *sc) 136 { 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); 141 } 142