1 /* 2 * mac80211 debugfs for wireless PHYs 3 * 4 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> 5 * Copyright 2013-2014 Intel Mobile Communications GmbH 6 * 7 * GPLv2 8 * 9 */ 10 11 #include <linux/debugfs.h> 12 #include <linux/rtnetlink.h> 13 #include "ieee80211_i.h" 14 #include "driver-ops.h" 15 #include "rate.h" 16 #include "debugfs.h" 17 18 #define DEBUGFS_FORMAT_BUFFER_SIZE 100 19 20 int mac80211_format_buffer(char __user *userbuf, size_t count, 21 loff_t *ppos, char *fmt, ...) 22 { 23 va_list args; 24 char buf[DEBUGFS_FORMAT_BUFFER_SIZE]; 25 int res; 26 27 va_start(args, fmt); 28 res = vscnprintf(buf, sizeof(buf), fmt, args); 29 va_end(args); 30 31 return simple_read_from_buffer(userbuf, count, ppos, buf, res); 32 } 33 34 #define DEBUGFS_READONLY_FILE_FN(name, fmt, value...) \ 35 static ssize_t name## _read(struct file *file, char __user *userbuf, \ 36 size_t count, loff_t *ppos) \ 37 { \ 38 struct ieee80211_local *local = file->private_data; \ 39 \ 40 return mac80211_format_buffer(userbuf, count, ppos, \ 41 fmt "\n", ##value); \ 42 } 43 44 #define DEBUGFS_READONLY_FILE_OPS(name) \ 45 static const struct file_operations name## _ops = { \ 46 .read = name## _read, \ 47 .open = simple_open, \ 48 .llseek = generic_file_llseek, \ 49 }; 50 51 #define DEBUGFS_READONLY_FILE(name, fmt, value...) \ 52 DEBUGFS_READONLY_FILE_FN(name, fmt, value) \ 53 DEBUGFS_READONLY_FILE_OPS(name) 54 55 #define DEBUGFS_ADD(name) \ 56 debugfs_create_file(#name, 0400, phyd, local, &name## _ops); 57 58 #define DEBUGFS_ADD_MODE(name, mode) \ 59 debugfs_create_file(#name, mode, phyd, local, &name## _ops); 60 61 62 DEBUGFS_READONLY_FILE(user_power, "%d", 63 local->user_power_level); 64 DEBUGFS_READONLY_FILE(power, "%d", 65 local->hw.conf.power_level); 66 DEBUGFS_READONLY_FILE(total_ps_buffered, "%d", 67 local->total_ps_buffered); 68 DEBUGFS_READONLY_FILE(wep_iv, "%#08x", 69 local->wep_iv & 0xffffff); 70 DEBUGFS_READONLY_FILE(rate_ctrl_alg, "%s", 71 local->rate_ctrl ? local->rate_ctrl->ops->name : "hw/driver"); 72 73 #ifdef CONFIG_PM 74 static ssize_t reset_write(struct file *file, const char __user *user_buf, 75 size_t count, loff_t *ppos) 76 { 77 struct ieee80211_local *local = file->private_data; 78 79 rtnl_lock(); 80 __ieee80211_suspend(&local->hw, NULL); 81 __ieee80211_resume(&local->hw); 82 rtnl_unlock(); 83 84 return count; 85 } 86 87 static const struct file_operations reset_ops = { 88 .write = reset_write, 89 .open = simple_open, 90 .llseek = noop_llseek, 91 }; 92 #endif 93 94 static const char *hw_flag_names[] = { 95 #define FLAG(F) [IEEE80211_HW_##F] = #F 96 FLAG(HAS_RATE_CONTROL), 97 FLAG(RX_INCLUDES_FCS), 98 FLAG(HOST_BROADCAST_PS_BUFFERING), 99 FLAG(SIGNAL_UNSPEC), 100 FLAG(SIGNAL_DBM), 101 FLAG(NEED_DTIM_BEFORE_ASSOC), 102 FLAG(SPECTRUM_MGMT), 103 FLAG(AMPDU_AGGREGATION), 104 FLAG(SUPPORTS_PS), 105 FLAG(PS_NULLFUNC_STACK), 106 FLAG(SUPPORTS_DYNAMIC_PS), 107 FLAG(MFP_CAPABLE), 108 FLAG(WANT_MONITOR_VIF), 109 FLAG(NO_AUTO_VIF), 110 FLAG(SW_CRYPTO_CONTROL), 111 FLAG(SUPPORT_FAST_XMIT), 112 FLAG(REPORTS_TX_ACK_STATUS), 113 FLAG(CONNECTION_MONITOR), 114 FLAG(QUEUE_CONTROL), 115 FLAG(SUPPORTS_PER_STA_GTK), 116 FLAG(AP_LINK_PS), 117 FLAG(TX_AMPDU_SETUP_IN_HW), 118 FLAG(SUPPORTS_RC_TABLE), 119 FLAG(P2P_DEV_ADDR_FOR_INTF), 120 FLAG(TIMING_BEACON_ONLY), 121 FLAG(SUPPORTS_HT_CCK_RATES), 122 FLAG(CHANCTX_STA_CSA), 123 FLAG(SUPPORTS_CLONED_SKBS), 124 FLAG(SINGLE_SCAN_ON_ALL_BANDS), 125 FLAG(TDLS_WIDER_BW), 126 FLAG(SUPPORTS_AMSDU_IN_AMPDU), 127 FLAG(BEACON_TX_STATUS), 128 FLAG(NEEDS_UNIQUE_STA_ADDR), 129 FLAG(SUPPORTS_REORDERING_BUFFER), 130 #undef FLAG 131 }; 132 133 static ssize_t hwflags_read(struct file *file, char __user *user_buf, 134 size_t count, loff_t *ppos) 135 { 136 struct ieee80211_local *local = file->private_data; 137 size_t bufsz = 30 * NUM_IEEE80211_HW_FLAGS; 138 char *buf = kzalloc(bufsz, GFP_KERNEL); 139 char *pos = buf, *end = buf + bufsz - 1; 140 ssize_t rv; 141 int i; 142 143 if (!buf) 144 return -ENOMEM; 145 146 /* fail compilation if somebody adds or removes 147 * a flag without updating the name array above 148 */ 149 BUILD_BUG_ON(ARRAY_SIZE(hw_flag_names) != NUM_IEEE80211_HW_FLAGS); 150 151 for (i = 0; i < NUM_IEEE80211_HW_FLAGS; i++) { 152 if (test_bit(i, local->hw.flags)) 153 pos += scnprintf(pos, end - pos, "%s\n", 154 hw_flag_names[i]); 155 } 156 157 rv = simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf)); 158 kfree(buf); 159 return rv; 160 } 161 162 static ssize_t queues_read(struct file *file, char __user *user_buf, 163 size_t count, loff_t *ppos) 164 { 165 struct ieee80211_local *local = file->private_data; 166 unsigned long flags; 167 char buf[IEEE80211_MAX_QUEUES * 20]; 168 int q, res = 0; 169 170 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 171 for (q = 0; q < local->hw.queues; q++) 172 res += sprintf(buf + res, "%02d: %#.8lx/%d\n", q, 173 local->queue_stop_reasons[q], 174 skb_queue_len(&local->pending[q])); 175 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 176 177 return simple_read_from_buffer(user_buf, count, ppos, buf, res); 178 } 179 180 DEBUGFS_READONLY_FILE_OPS(hwflags); 181 DEBUGFS_READONLY_FILE_OPS(queues); 182 183 /* statistics stuff */ 184 185 static ssize_t format_devstat_counter(struct ieee80211_local *local, 186 char __user *userbuf, 187 size_t count, loff_t *ppos, 188 int (*printvalue)(struct ieee80211_low_level_stats *stats, char *buf, 189 int buflen)) 190 { 191 struct ieee80211_low_level_stats stats; 192 char buf[20]; 193 int res; 194 195 rtnl_lock(); 196 res = drv_get_stats(local, &stats); 197 rtnl_unlock(); 198 if (res) 199 return res; 200 res = printvalue(&stats, buf, sizeof(buf)); 201 return simple_read_from_buffer(userbuf, count, ppos, buf, res); 202 } 203 204 #define DEBUGFS_DEVSTATS_FILE(name) \ 205 static int print_devstats_##name(struct ieee80211_low_level_stats *stats,\ 206 char *buf, int buflen) \ 207 { \ 208 return scnprintf(buf, buflen, "%u\n", stats->name); \ 209 } \ 210 static ssize_t stats_ ##name## _read(struct file *file, \ 211 char __user *userbuf, \ 212 size_t count, loff_t *ppos) \ 213 { \ 214 return format_devstat_counter(file->private_data, \ 215 userbuf, \ 216 count, \ 217 ppos, \ 218 print_devstats_##name); \ 219 } \ 220 \ 221 static const struct file_operations stats_ ##name## _ops = { \ 222 .read = stats_ ##name## _read, \ 223 .open = simple_open, \ 224 .llseek = generic_file_llseek, \ 225 }; 226 227 #define DEBUGFS_STATS_ADD(name) \ 228 debugfs_create_u32(#name, 0400, statsd, &local->name); 229 #define DEBUGFS_DEVSTATS_ADD(name) \ 230 debugfs_create_file(#name, 0400, statsd, local, &stats_ ##name## _ops); 231 232 DEBUGFS_DEVSTATS_FILE(dot11ACKFailureCount); 233 DEBUGFS_DEVSTATS_FILE(dot11RTSFailureCount); 234 DEBUGFS_DEVSTATS_FILE(dot11FCSErrorCount); 235 DEBUGFS_DEVSTATS_FILE(dot11RTSSuccessCount); 236 237 void debugfs_hw_add(struct ieee80211_local *local) 238 { 239 struct dentry *phyd = local->hw.wiphy->debugfsdir; 240 struct dentry *statsd; 241 242 if (!phyd) 243 return; 244 245 local->debugfs.keys = debugfs_create_dir("keys", phyd); 246 247 DEBUGFS_ADD(total_ps_buffered); 248 DEBUGFS_ADD(wep_iv); 249 DEBUGFS_ADD(queues); 250 #ifdef CONFIG_PM 251 DEBUGFS_ADD_MODE(reset, 0200); 252 #endif 253 DEBUGFS_ADD(hwflags); 254 DEBUGFS_ADD(user_power); 255 DEBUGFS_ADD(power); 256 257 statsd = debugfs_create_dir("statistics", phyd); 258 259 /* if the dir failed, don't put all the other things into the root! */ 260 if (!statsd) 261 return; 262 263 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS 264 DEBUGFS_STATS_ADD(dot11TransmittedFragmentCount); 265 DEBUGFS_STATS_ADD(dot11MulticastTransmittedFrameCount); 266 DEBUGFS_STATS_ADD(dot11FailedCount); 267 DEBUGFS_STATS_ADD(dot11RetryCount); 268 DEBUGFS_STATS_ADD(dot11MultipleRetryCount); 269 DEBUGFS_STATS_ADD(dot11FrameDuplicateCount); 270 DEBUGFS_STATS_ADD(dot11ReceivedFragmentCount); 271 DEBUGFS_STATS_ADD(dot11MulticastReceivedFrameCount); 272 DEBUGFS_STATS_ADD(dot11TransmittedFrameCount); 273 DEBUGFS_STATS_ADD(tx_handlers_drop); 274 DEBUGFS_STATS_ADD(tx_handlers_queued); 275 DEBUGFS_STATS_ADD(tx_handlers_drop_wep); 276 DEBUGFS_STATS_ADD(tx_handlers_drop_not_assoc); 277 DEBUGFS_STATS_ADD(tx_handlers_drop_unauth_port); 278 DEBUGFS_STATS_ADD(rx_handlers_drop); 279 DEBUGFS_STATS_ADD(rx_handlers_queued); 280 DEBUGFS_STATS_ADD(rx_handlers_drop_nullfunc); 281 DEBUGFS_STATS_ADD(rx_handlers_drop_defrag); 282 DEBUGFS_STATS_ADD(tx_expand_skb_head); 283 DEBUGFS_STATS_ADD(tx_expand_skb_head_cloned); 284 DEBUGFS_STATS_ADD(rx_expand_skb_head_defrag); 285 DEBUGFS_STATS_ADD(rx_handlers_fragments); 286 DEBUGFS_STATS_ADD(tx_status_drop); 287 #endif 288 DEBUGFS_DEVSTATS_ADD(dot11ACKFailureCount); 289 DEBUGFS_DEVSTATS_ADD(dot11RTSFailureCount); 290 DEBUGFS_DEVSTATS_ADD(dot11FCSErrorCount); 291 DEBUGFS_DEVSTATS_ADD(dot11RTSSuccessCount); 292 } 293