1 2 /* 3 * mac80211 debugfs for wireless PHYs 4 * 5 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> 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 ssize_t hwflags_read(struct file *file, char __user *user_buf, 95 size_t count, loff_t *ppos) 96 { 97 struct ieee80211_local *local = file->private_data; 98 int mxln = 500; 99 ssize_t rv; 100 char *buf = kzalloc(mxln, GFP_KERNEL); 101 int sf = 0; /* how many written so far */ 102 103 if (!buf) 104 return 0; 105 106 sf += scnprintf(buf, mxln - sf, "0x%x\n", local->hw.flags); 107 if (local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL) 108 sf += scnprintf(buf + sf, mxln - sf, "HAS_RATE_CONTROL\n"); 109 if (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS) 110 sf += scnprintf(buf + sf, mxln - sf, "RX_INCLUDES_FCS\n"); 111 if (local->hw.flags & IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING) 112 sf += scnprintf(buf + sf, mxln - sf, 113 "HOST_BCAST_PS_BUFFERING\n"); 114 if (local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE) 115 sf += scnprintf(buf + sf, mxln - sf, 116 "2GHZ_SHORT_SLOT_INCAPABLE\n"); 117 if (local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE) 118 sf += scnprintf(buf + sf, mxln - sf, 119 "2GHZ_SHORT_PREAMBLE_INCAPABLE\n"); 120 if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC) 121 sf += scnprintf(buf + sf, mxln - sf, "SIGNAL_UNSPEC\n"); 122 if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) 123 sf += scnprintf(buf + sf, mxln - sf, "SIGNAL_DBM\n"); 124 if (local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC) 125 sf += scnprintf(buf + sf, mxln - sf, 126 "NEED_DTIM_BEFORE_ASSOC\n"); 127 if (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT) 128 sf += scnprintf(buf + sf, mxln - sf, "SPECTRUM_MGMT\n"); 129 if (local->hw.flags & IEEE80211_HW_AMPDU_AGGREGATION) 130 sf += scnprintf(buf + sf, mxln - sf, "AMPDU_AGGREGATION\n"); 131 if (local->hw.flags & IEEE80211_HW_SUPPORTS_PS) 132 sf += scnprintf(buf + sf, mxln - sf, "SUPPORTS_PS\n"); 133 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) 134 sf += scnprintf(buf + sf, mxln - sf, "PS_NULLFUNC_STACK\n"); 135 if (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS) 136 sf += scnprintf(buf + sf, mxln - sf, "SUPPORTS_DYNAMIC_PS\n"); 137 if (local->hw.flags & IEEE80211_HW_MFP_CAPABLE) 138 sf += scnprintf(buf + sf, mxln - sf, "MFP_CAPABLE\n"); 139 if (local->hw.flags & IEEE80211_HW_SUPPORTS_STATIC_SMPS) 140 sf += scnprintf(buf + sf, mxln - sf, "SUPPORTS_STATIC_SMPS\n"); 141 if (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS) 142 sf += scnprintf(buf + sf, mxln - sf, 143 "SUPPORTS_DYNAMIC_SMPS\n"); 144 if (local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD) 145 sf += scnprintf(buf + sf, mxln - sf, "SUPPORTS_UAPSD\n"); 146 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) 147 sf += scnprintf(buf + sf, mxln - sf, 148 "REPORTS_TX_ACK_STATUS\n"); 149 if (local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR) 150 sf += scnprintf(buf + sf, mxln - sf, "CONNECTION_MONITOR\n"); 151 if (local->hw.flags & IEEE80211_HW_SUPPORTS_PER_STA_GTK) 152 sf += scnprintf(buf + sf, mxln - sf, "SUPPORTS_PER_STA_GTK\n"); 153 if (local->hw.flags & IEEE80211_HW_AP_LINK_PS) 154 sf += scnprintf(buf + sf, mxln - sf, "AP_LINK_PS\n"); 155 if (local->hw.flags & IEEE80211_HW_TX_AMPDU_SETUP_IN_HW) 156 sf += scnprintf(buf + sf, mxln - sf, "TX_AMPDU_SETUP_IN_HW\n"); 157 158 rv = simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf)); 159 kfree(buf); 160 return rv; 161 } 162 163 static ssize_t queues_read(struct file *file, char __user *user_buf, 164 size_t count, loff_t *ppos) 165 { 166 struct ieee80211_local *local = file->private_data; 167 unsigned long flags; 168 char buf[IEEE80211_MAX_QUEUES * 20]; 169 int q, res = 0; 170 171 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 172 for (q = 0; q < local->hw.queues; q++) 173 res += sprintf(buf + res, "%02d: %#.8lx/%d\n", q, 174 local->queue_stop_reasons[q], 175 skb_queue_len(&local->pending[q])); 176 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 177 178 return simple_read_from_buffer(user_buf, count, ppos, buf, res); 179 } 180 181 DEBUGFS_READONLY_FILE_OPS(hwflags); 182 DEBUGFS_READONLY_FILE_OPS(queues); 183 184 /* statistics stuff */ 185 186 static ssize_t format_devstat_counter(struct ieee80211_local *local, 187 char __user *userbuf, 188 size_t count, loff_t *ppos, 189 int (*printvalue)(struct ieee80211_low_level_stats *stats, char *buf, 190 int buflen)) 191 { 192 struct ieee80211_low_level_stats stats; 193 char buf[20]; 194 int res; 195 196 rtnl_lock(); 197 res = drv_get_stats(local, &stats); 198 rtnl_unlock(); 199 if (res) 200 return res; 201 res = printvalue(&stats, buf, sizeof(buf)); 202 return simple_read_from_buffer(userbuf, count, ppos, buf, res); 203 } 204 205 #define DEBUGFS_DEVSTATS_FILE(name) \ 206 static int print_devstats_##name(struct ieee80211_low_level_stats *stats,\ 207 char *buf, int buflen) \ 208 { \ 209 return scnprintf(buf, buflen, "%u\n", stats->name); \ 210 } \ 211 static ssize_t stats_ ##name## _read(struct file *file, \ 212 char __user *userbuf, \ 213 size_t count, loff_t *ppos) \ 214 { \ 215 return format_devstat_counter(file->private_data, \ 216 userbuf, \ 217 count, \ 218 ppos, \ 219 print_devstats_##name); \ 220 } \ 221 \ 222 static const struct file_operations stats_ ##name## _ops = { \ 223 .read = stats_ ##name## _read, \ 224 .open = simple_open, \ 225 .llseek = generic_file_llseek, \ 226 }; 227 228 #define DEBUGFS_STATS_ADD(name, field) \ 229 debugfs_create_u32(#name, 0400, statsd, (u32 *) &field); 230 #define DEBUGFS_DEVSTATS_ADD(name) \ 231 debugfs_create_file(#name, 0400, statsd, local, &stats_ ##name## _ops); 232 233 DEBUGFS_DEVSTATS_FILE(dot11ACKFailureCount); 234 DEBUGFS_DEVSTATS_FILE(dot11RTSFailureCount); 235 DEBUGFS_DEVSTATS_FILE(dot11FCSErrorCount); 236 DEBUGFS_DEVSTATS_FILE(dot11RTSSuccessCount); 237 238 void debugfs_hw_add(struct ieee80211_local *local) 239 { 240 struct dentry *phyd = local->hw.wiphy->debugfsdir; 241 struct dentry *statsd; 242 243 if (!phyd) 244 return; 245 246 local->debugfs.keys = debugfs_create_dir("keys", phyd); 247 248 DEBUGFS_ADD(total_ps_buffered); 249 DEBUGFS_ADD(wep_iv); 250 DEBUGFS_ADD(queues); 251 #ifdef CONFIG_PM 252 DEBUGFS_ADD_MODE(reset, 0200); 253 #endif 254 DEBUGFS_ADD(hwflags); 255 DEBUGFS_ADD(user_power); 256 DEBUGFS_ADD(power); 257 258 statsd = debugfs_create_dir("statistics", phyd); 259 260 /* if the dir failed, don't put all the other things into the root! */ 261 if (!statsd) 262 return; 263 264 DEBUGFS_STATS_ADD(transmitted_fragment_count, 265 local->dot11TransmittedFragmentCount); 266 DEBUGFS_STATS_ADD(multicast_transmitted_frame_count, 267 local->dot11MulticastTransmittedFrameCount); 268 DEBUGFS_STATS_ADD(failed_count, local->dot11FailedCount); 269 DEBUGFS_STATS_ADD(retry_count, local->dot11RetryCount); 270 DEBUGFS_STATS_ADD(multiple_retry_count, 271 local->dot11MultipleRetryCount); 272 DEBUGFS_STATS_ADD(frame_duplicate_count, 273 local->dot11FrameDuplicateCount); 274 DEBUGFS_STATS_ADD(received_fragment_count, 275 local->dot11ReceivedFragmentCount); 276 DEBUGFS_STATS_ADD(multicast_received_frame_count, 277 local->dot11MulticastReceivedFrameCount); 278 DEBUGFS_STATS_ADD(transmitted_frame_count, 279 local->dot11TransmittedFrameCount); 280 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS 281 DEBUGFS_STATS_ADD(tx_handlers_drop, local->tx_handlers_drop); 282 DEBUGFS_STATS_ADD(tx_handlers_queued, local->tx_handlers_queued); 283 DEBUGFS_STATS_ADD(tx_handlers_drop_unencrypted, 284 local->tx_handlers_drop_unencrypted); 285 DEBUGFS_STATS_ADD(tx_handlers_drop_fragment, 286 local->tx_handlers_drop_fragment); 287 DEBUGFS_STATS_ADD(tx_handlers_drop_wep, 288 local->tx_handlers_drop_wep); 289 DEBUGFS_STATS_ADD(tx_handlers_drop_not_assoc, 290 local->tx_handlers_drop_not_assoc); 291 DEBUGFS_STATS_ADD(tx_handlers_drop_unauth_port, 292 local->tx_handlers_drop_unauth_port); 293 DEBUGFS_STATS_ADD(rx_handlers_drop, local->rx_handlers_drop); 294 DEBUGFS_STATS_ADD(rx_handlers_queued, local->rx_handlers_queued); 295 DEBUGFS_STATS_ADD(rx_handlers_drop_nullfunc, 296 local->rx_handlers_drop_nullfunc); 297 DEBUGFS_STATS_ADD(rx_handlers_drop_defrag, 298 local->rx_handlers_drop_defrag); 299 DEBUGFS_STATS_ADD(rx_handlers_drop_short, 300 local->rx_handlers_drop_short); 301 DEBUGFS_STATS_ADD(tx_expand_skb_head, 302 local->tx_expand_skb_head); 303 DEBUGFS_STATS_ADD(tx_expand_skb_head_cloned, 304 local->tx_expand_skb_head_cloned); 305 DEBUGFS_STATS_ADD(rx_expand_skb_head, 306 local->rx_expand_skb_head); 307 DEBUGFS_STATS_ADD(rx_expand_skb_head2, 308 local->rx_expand_skb_head2); 309 DEBUGFS_STATS_ADD(rx_handlers_fragments, 310 local->rx_handlers_fragments); 311 DEBUGFS_STATS_ADD(tx_status_drop, 312 local->tx_status_drop); 313 #endif 314 DEBUGFS_DEVSTATS_ADD(dot11ACKFailureCount); 315 DEBUGFS_DEVSTATS_ADD(dot11RTSFailureCount); 316 DEBUGFS_DEVSTATS_ADD(dot11FCSErrorCount); 317 DEBUGFS_DEVSTATS_ADD(dot11RTSSuccessCount); 318 } 319