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 static ssize_t reset_write(struct file *file, const char __user *user_buf, 74 size_t count, loff_t *ppos) 75 { 76 struct ieee80211_local *local = file->private_data; 77 78 rtnl_lock(); 79 __ieee80211_suspend(&local->hw, NULL); 80 __ieee80211_resume(&local->hw); 81 rtnl_unlock(); 82 83 return count; 84 } 85 86 static const struct file_operations reset_ops = { 87 .write = reset_write, 88 .open = simple_open, 89 .llseek = noop_llseek, 90 }; 91 92 static ssize_t hwflags_read(struct file *file, char __user *user_buf, 93 size_t count, loff_t *ppos) 94 { 95 struct ieee80211_local *local = file->private_data; 96 int mxln = 500; 97 ssize_t rv; 98 char *buf = kzalloc(mxln, GFP_KERNEL); 99 int sf = 0; /* how many written so far */ 100 101 if (!buf) 102 return 0; 103 104 sf += snprintf(buf, mxln - sf, "0x%x\n", local->hw.flags); 105 if (local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL) 106 sf += snprintf(buf + sf, mxln - sf, "HAS_RATE_CONTROL\n"); 107 if (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS) 108 sf += snprintf(buf + sf, mxln - sf, "RX_INCLUDES_FCS\n"); 109 if (local->hw.flags & IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING) 110 sf += snprintf(buf + sf, mxln - sf, 111 "HOST_BCAST_PS_BUFFERING\n"); 112 if (local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE) 113 sf += snprintf(buf + sf, mxln - sf, 114 "2GHZ_SHORT_SLOT_INCAPABLE\n"); 115 if (local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE) 116 sf += snprintf(buf + sf, mxln - sf, 117 "2GHZ_SHORT_PREAMBLE_INCAPABLE\n"); 118 if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC) 119 sf += snprintf(buf + sf, mxln - sf, "SIGNAL_UNSPEC\n"); 120 if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) 121 sf += snprintf(buf + sf, mxln - sf, "SIGNAL_DBM\n"); 122 if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD) 123 sf += snprintf(buf + sf, mxln - sf, "NEED_DTIM_PERIOD\n"); 124 if (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT) 125 sf += snprintf(buf + sf, mxln - sf, "SPECTRUM_MGMT\n"); 126 if (local->hw.flags & IEEE80211_HW_AMPDU_AGGREGATION) 127 sf += snprintf(buf + sf, mxln - sf, "AMPDU_AGGREGATION\n"); 128 if (local->hw.flags & IEEE80211_HW_SUPPORTS_PS) 129 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_PS\n"); 130 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) 131 sf += snprintf(buf + sf, mxln - sf, "PS_NULLFUNC_STACK\n"); 132 if (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS) 133 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_DYNAMIC_PS\n"); 134 if (local->hw.flags & IEEE80211_HW_MFP_CAPABLE) 135 sf += snprintf(buf + sf, mxln - sf, "MFP_CAPABLE\n"); 136 if (local->hw.flags & IEEE80211_HW_SUPPORTS_STATIC_SMPS) 137 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_STATIC_SMPS\n"); 138 if (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS) 139 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_DYNAMIC_SMPS\n"); 140 if (local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD) 141 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_UAPSD\n"); 142 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) 143 sf += snprintf(buf + sf, mxln - sf, "REPORTS_TX_ACK_STATUS\n"); 144 if (local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR) 145 sf += snprintf(buf + sf, mxln - sf, "CONNECTION_MONITOR\n"); 146 if (local->hw.flags & IEEE80211_HW_SUPPORTS_PER_STA_GTK) 147 sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_PER_STA_GTK\n"); 148 if (local->hw.flags & IEEE80211_HW_AP_LINK_PS) 149 sf += snprintf(buf + sf, mxln - sf, "AP_LINK_PS\n"); 150 if (local->hw.flags & IEEE80211_HW_TX_AMPDU_SETUP_IN_HW) 151 sf += snprintf(buf + sf, mxln - sf, "TX_AMPDU_SETUP_IN_HW\n"); 152 if (local->hw.flags & IEEE80211_HW_SCAN_WHILE_IDLE) 153 sf += snprintf(buf + sf, mxln - sf, "SCAN_WHILE_IDLE\n"); 154 155 rv = simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf)); 156 kfree(buf); 157 return rv; 158 } 159 160 static ssize_t queues_read(struct file *file, char __user *user_buf, 161 size_t count, loff_t *ppos) 162 { 163 struct ieee80211_local *local = file->private_data; 164 unsigned long flags; 165 char buf[IEEE80211_MAX_QUEUES * 20]; 166 int q, res = 0; 167 168 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 169 for (q = 0; q < local->hw.queues; q++) 170 res += sprintf(buf + res, "%02d: %#.8lx/%d\n", q, 171 local->queue_stop_reasons[q], 172 skb_queue_len(&local->pending[q])); 173 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 174 175 return simple_read_from_buffer(user_buf, count, ppos, buf, res); 176 } 177 178 DEBUGFS_READONLY_FILE_OPS(hwflags); 179 DEBUGFS_READONLY_FILE_OPS(queues); 180 181 /* statistics stuff */ 182 183 static ssize_t format_devstat_counter(struct ieee80211_local *local, 184 char __user *userbuf, 185 size_t count, loff_t *ppos, 186 int (*printvalue)(struct ieee80211_low_level_stats *stats, char *buf, 187 int buflen)) 188 { 189 struct ieee80211_low_level_stats stats; 190 char buf[20]; 191 int res; 192 193 rtnl_lock(); 194 res = drv_get_stats(local, &stats); 195 rtnl_unlock(); 196 if (res) 197 return res; 198 res = printvalue(&stats, buf, sizeof(buf)); 199 return simple_read_from_buffer(userbuf, count, ppos, buf, res); 200 } 201 202 #define DEBUGFS_DEVSTATS_FILE(name) \ 203 static int print_devstats_##name(struct ieee80211_low_level_stats *stats,\ 204 char *buf, int buflen) \ 205 { \ 206 return scnprintf(buf, buflen, "%u\n", stats->name); \ 207 } \ 208 static ssize_t stats_ ##name## _read(struct file *file, \ 209 char __user *userbuf, \ 210 size_t count, loff_t *ppos) \ 211 { \ 212 return format_devstat_counter(file->private_data, \ 213 userbuf, \ 214 count, \ 215 ppos, \ 216 print_devstats_##name); \ 217 } \ 218 \ 219 static const struct file_operations stats_ ##name## _ops = { \ 220 .read = stats_ ##name## _read, \ 221 .open = simple_open, \ 222 .llseek = generic_file_llseek, \ 223 }; 224 225 #define DEBUGFS_STATS_ADD(name, field) \ 226 debugfs_create_u32(#name, 0400, statsd, (u32 *) &field); 227 #define DEBUGFS_DEVSTATS_ADD(name) \ 228 debugfs_create_file(#name, 0400, statsd, local, &stats_ ##name## _ops); 229 230 DEBUGFS_DEVSTATS_FILE(dot11ACKFailureCount); 231 DEBUGFS_DEVSTATS_FILE(dot11RTSFailureCount); 232 DEBUGFS_DEVSTATS_FILE(dot11FCSErrorCount); 233 DEBUGFS_DEVSTATS_FILE(dot11RTSSuccessCount); 234 235 void debugfs_hw_add(struct ieee80211_local *local) 236 { 237 struct dentry *phyd = local->hw.wiphy->debugfsdir; 238 struct dentry *statsd; 239 240 if (!phyd) 241 return; 242 243 local->debugfs.keys = debugfs_create_dir("keys", phyd); 244 245 DEBUGFS_ADD(total_ps_buffered); 246 DEBUGFS_ADD(wep_iv); 247 DEBUGFS_ADD(queues); 248 DEBUGFS_ADD_MODE(reset, 0200); 249 DEBUGFS_ADD(hwflags); 250 DEBUGFS_ADD(user_power); 251 DEBUGFS_ADD(power); 252 253 statsd = debugfs_create_dir("statistics", phyd); 254 255 /* if the dir failed, don't put all the other things into the root! */ 256 if (!statsd) 257 return; 258 259 DEBUGFS_STATS_ADD(transmitted_fragment_count, 260 local->dot11TransmittedFragmentCount); 261 DEBUGFS_STATS_ADD(multicast_transmitted_frame_count, 262 local->dot11MulticastTransmittedFrameCount); 263 DEBUGFS_STATS_ADD(failed_count, local->dot11FailedCount); 264 DEBUGFS_STATS_ADD(retry_count, local->dot11RetryCount); 265 DEBUGFS_STATS_ADD(multiple_retry_count, 266 local->dot11MultipleRetryCount); 267 DEBUGFS_STATS_ADD(frame_duplicate_count, 268 local->dot11FrameDuplicateCount); 269 DEBUGFS_STATS_ADD(received_fragment_count, 270 local->dot11ReceivedFragmentCount); 271 DEBUGFS_STATS_ADD(multicast_received_frame_count, 272 local->dot11MulticastReceivedFrameCount); 273 DEBUGFS_STATS_ADD(transmitted_frame_count, 274 local->dot11TransmittedFrameCount); 275 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS 276 DEBUGFS_STATS_ADD(tx_handlers_drop, local->tx_handlers_drop); 277 DEBUGFS_STATS_ADD(tx_handlers_queued, local->tx_handlers_queued); 278 DEBUGFS_STATS_ADD(tx_handlers_drop_unencrypted, 279 local->tx_handlers_drop_unencrypted); 280 DEBUGFS_STATS_ADD(tx_handlers_drop_fragment, 281 local->tx_handlers_drop_fragment); 282 DEBUGFS_STATS_ADD(tx_handlers_drop_wep, 283 local->tx_handlers_drop_wep); 284 DEBUGFS_STATS_ADD(tx_handlers_drop_not_assoc, 285 local->tx_handlers_drop_not_assoc); 286 DEBUGFS_STATS_ADD(tx_handlers_drop_unauth_port, 287 local->tx_handlers_drop_unauth_port); 288 DEBUGFS_STATS_ADD(rx_handlers_drop, local->rx_handlers_drop); 289 DEBUGFS_STATS_ADD(rx_handlers_queued, local->rx_handlers_queued); 290 DEBUGFS_STATS_ADD(rx_handlers_drop_nullfunc, 291 local->rx_handlers_drop_nullfunc); 292 DEBUGFS_STATS_ADD(rx_handlers_drop_defrag, 293 local->rx_handlers_drop_defrag); 294 DEBUGFS_STATS_ADD(rx_handlers_drop_short, 295 local->rx_handlers_drop_short); 296 DEBUGFS_STATS_ADD(tx_expand_skb_head, 297 local->tx_expand_skb_head); 298 DEBUGFS_STATS_ADD(tx_expand_skb_head_cloned, 299 local->tx_expand_skb_head_cloned); 300 DEBUGFS_STATS_ADD(rx_expand_skb_head, 301 local->rx_expand_skb_head); 302 DEBUGFS_STATS_ADD(rx_expand_skb_head2, 303 local->rx_expand_skb_head2); 304 DEBUGFS_STATS_ADD(rx_handlers_fragments, 305 local->rx_handlers_fragments); 306 DEBUGFS_STATS_ADD(tx_status_drop, 307 local->tx_status_drop); 308 #endif 309 DEBUGFS_DEVSTATS_ADD(dot11ACKFailureCount); 310 DEBUGFS_DEVSTATS_ADD(dot11RTSFailureCount); 311 DEBUGFS_DEVSTATS_ADD(dot11FCSErrorCount); 312 DEBUGFS_DEVSTATS_ADD(dot11RTSSuccessCount); 313 } 314