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[NUM_IEEE80211_HW_FLAGS + 1] = { 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), 126 127 /* keep last for the build bug below */ 128 (void *)0x1 129 #undef FLAG 130 }; 131 132 static ssize_t hwflags_read(struct file *file, char __user *user_buf, 133 size_t count, loff_t *ppos) 134 { 135 struct ieee80211_local *local = file->private_data; 136 size_t bufsz = 30 * NUM_IEEE80211_HW_FLAGS; 137 char *buf = kzalloc(bufsz, GFP_KERNEL); 138 char *pos = buf, *end = buf + bufsz - 1; 139 ssize_t rv; 140 int i; 141 142 if (!buf) 143 return -ENOMEM; 144 145 /* fail compilation if somebody adds or removes 146 * a flag without updating the name array above 147 */ 148 BUILD_BUG_ON(hw_flag_names[NUM_IEEE80211_HW_FLAGS] != (void *)0x1); 149 150 for (i = 0; i < NUM_IEEE80211_HW_FLAGS; i++) { 151 if (test_bit(i, local->hw.flags)) 152 pos += scnprintf(pos, end - pos, "%s", 153 hw_flag_names[i]); 154 } 155 156 rv = simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf)); 157 kfree(buf); 158 return rv; 159 } 160 161 static ssize_t queues_read(struct file *file, char __user *user_buf, 162 size_t count, loff_t *ppos) 163 { 164 struct ieee80211_local *local = file->private_data; 165 unsigned long flags; 166 char buf[IEEE80211_MAX_QUEUES * 20]; 167 int q, res = 0; 168 169 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 170 for (q = 0; q < local->hw.queues; q++) 171 res += sprintf(buf + res, "%02d: %#.8lx/%d\n", q, 172 local->queue_stop_reasons[q], 173 skb_queue_len(&local->pending[q])); 174 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 175 176 return simple_read_from_buffer(user_buf, count, ppos, buf, res); 177 } 178 179 DEBUGFS_READONLY_FILE_OPS(hwflags); 180 DEBUGFS_READONLY_FILE_OPS(queues); 181 182 /* statistics stuff */ 183 184 static ssize_t format_devstat_counter(struct ieee80211_local *local, 185 char __user *userbuf, 186 size_t count, loff_t *ppos, 187 int (*printvalue)(struct ieee80211_low_level_stats *stats, char *buf, 188 int buflen)) 189 { 190 struct ieee80211_low_level_stats stats; 191 char buf[20]; 192 int res; 193 194 rtnl_lock(); 195 res = drv_get_stats(local, &stats); 196 rtnl_unlock(); 197 if (res) 198 return res; 199 res = printvalue(&stats, buf, sizeof(buf)); 200 return simple_read_from_buffer(userbuf, count, ppos, buf, res); 201 } 202 203 #define DEBUGFS_DEVSTATS_FILE(name) \ 204 static int print_devstats_##name(struct ieee80211_low_level_stats *stats,\ 205 char *buf, int buflen) \ 206 { \ 207 return scnprintf(buf, buflen, "%u\n", stats->name); \ 208 } \ 209 static ssize_t stats_ ##name## _read(struct file *file, \ 210 char __user *userbuf, \ 211 size_t count, loff_t *ppos) \ 212 { \ 213 return format_devstat_counter(file->private_data, \ 214 userbuf, \ 215 count, \ 216 ppos, \ 217 print_devstats_##name); \ 218 } \ 219 \ 220 static const struct file_operations stats_ ##name## _ops = { \ 221 .read = stats_ ##name## _read, \ 222 .open = simple_open, \ 223 .llseek = generic_file_llseek, \ 224 }; 225 226 #define DEBUGFS_STATS_ADD(name) \ 227 debugfs_create_u32(#name, 0400, statsd, &local->name); 228 #define DEBUGFS_DEVSTATS_ADD(name) \ 229 debugfs_create_file(#name, 0400, statsd, local, &stats_ ##name## _ops); 230 231 DEBUGFS_DEVSTATS_FILE(dot11ACKFailureCount); 232 DEBUGFS_DEVSTATS_FILE(dot11RTSFailureCount); 233 DEBUGFS_DEVSTATS_FILE(dot11FCSErrorCount); 234 DEBUGFS_DEVSTATS_FILE(dot11RTSSuccessCount); 235 236 void debugfs_hw_add(struct ieee80211_local *local) 237 { 238 struct dentry *phyd = local->hw.wiphy->debugfsdir; 239 struct dentry *statsd; 240 241 if (!phyd) 242 return; 243 244 local->debugfs.keys = debugfs_create_dir("keys", phyd); 245 246 DEBUGFS_ADD(total_ps_buffered); 247 DEBUGFS_ADD(wep_iv); 248 DEBUGFS_ADD(queues); 249 #ifdef CONFIG_PM 250 DEBUGFS_ADD_MODE(reset, 0200); 251 #endif 252 DEBUGFS_ADD(hwflags); 253 DEBUGFS_ADD(user_power); 254 DEBUGFS_ADD(power); 255 256 statsd = debugfs_create_dir("statistics", phyd); 257 258 /* if the dir failed, don't put all the other things into the root! */ 259 if (!statsd) 260 return; 261 262 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS 263 DEBUGFS_STATS_ADD(dot11TransmittedFragmentCount); 264 DEBUGFS_STATS_ADD(dot11MulticastTransmittedFrameCount); 265 DEBUGFS_STATS_ADD(dot11FailedCount); 266 DEBUGFS_STATS_ADD(dot11RetryCount); 267 DEBUGFS_STATS_ADD(dot11MultipleRetryCount); 268 DEBUGFS_STATS_ADD(dot11FrameDuplicateCount); 269 DEBUGFS_STATS_ADD(dot11ReceivedFragmentCount); 270 DEBUGFS_STATS_ADD(dot11MulticastReceivedFrameCount); 271 DEBUGFS_STATS_ADD(dot11TransmittedFrameCount); 272 DEBUGFS_STATS_ADD(tx_handlers_drop); 273 DEBUGFS_STATS_ADD(tx_handlers_queued); 274 DEBUGFS_STATS_ADD(tx_handlers_drop_wep); 275 DEBUGFS_STATS_ADD(tx_handlers_drop_not_assoc); 276 DEBUGFS_STATS_ADD(tx_handlers_drop_unauth_port); 277 DEBUGFS_STATS_ADD(rx_handlers_drop); 278 DEBUGFS_STATS_ADD(rx_handlers_queued); 279 DEBUGFS_STATS_ADD(rx_handlers_drop_nullfunc); 280 DEBUGFS_STATS_ADD(rx_handlers_drop_defrag); 281 DEBUGFS_STATS_ADD(tx_expand_skb_head); 282 DEBUGFS_STATS_ADD(tx_expand_skb_head_cloned); 283 DEBUGFS_STATS_ADD(rx_expand_skb_head_defrag); 284 DEBUGFS_STATS_ADD(rx_handlers_fragments); 285 DEBUGFS_STATS_ADD(tx_status_drop); 286 #endif 287 DEBUGFS_DEVSTATS_ADD(dot11ACKFailureCount); 288 DEBUGFS_DEVSTATS_ADD(dot11RTSFailureCount); 289 DEBUGFS_DEVSTATS_ADD(dot11FCSErrorCount); 290 DEBUGFS_DEVSTATS_ADD(dot11RTSSuccessCount); 291 } 292