1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause 2 /* 3 * Copyright (C) 2012-2014, 2018-2021 Intel Corporation 4 * Copyright (C) 2013-2015 Intel Mobile Communications GmbH 5 * Copyright (C) 2016-2017 Intel Deutschland GmbH 6 */ 7 #include "mvm.h" 8 #include "debugfs.h" 9 10 static void iwl_dbgfs_update_pm(struct iwl_mvm *mvm, 11 struct ieee80211_vif *vif, 12 enum iwl_dbgfs_pm_mask param, int val) 13 { 14 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 15 struct iwl_dbgfs_pm *dbgfs_pm = &mvmvif->dbgfs_pm; 16 17 dbgfs_pm->mask |= param; 18 19 switch (param) { 20 case MVM_DEBUGFS_PM_KEEP_ALIVE: { 21 int dtimper = vif->bss_conf.dtim_period ?: 1; 22 int dtimper_msec = dtimper * vif->bss_conf.beacon_int; 23 24 IWL_DEBUG_POWER(mvm, "debugfs: set keep_alive= %d sec\n", val); 25 if (val * MSEC_PER_SEC < 3 * dtimper_msec) 26 IWL_WARN(mvm, 27 "debugfs: keep alive period (%ld msec) is less than minimum required (%d msec)\n", 28 val * MSEC_PER_SEC, 3 * dtimper_msec); 29 dbgfs_pm->keep_alive_seconds = val; 30 break; 31 } 32 case MVM_DEBUGFS_PM_SKIP_OVER_DTIM: 33 IWL_DEBUG_POWER(mvm, "skip_over_dtim %s\n", 34 val ? "enabled" : "disabled"); 35 dbgfs_pm->skip_over_dtim = val; 36 break; 37 case MVM_DEBUGFS_PM_SKIP_DTIM_PERIODS: 38 IWL_DEBUG_POWER(mvm, "skip_dtim_periods=%d\n", val); 39 dbgfs_pm->skip_dtim_periods = val; 40 break; 41 case MVM_DEBUGFS_PM_RX_DATA_TIMEOUT: 42 IWL_DEBUG_POWER(mvm, "rx_data_timeout=%d\n", val); 43 dbgfs_pm->rx_data_timeout = val; 44 break; 45 case MVM_DEBUGFS_PM_TX_DATA_TIMEOUT: 46 IWL_DEBUG_POWER(mvm, "tx_data_timeout=%d\n", val); 47 dbgfs_pm->tx_data_timeout = val; 48 break; 49 case MVM_DEBUGFS_PM_LPRX_ENA: 50 IWL_DEBUG_POWER(mvm, "lprx %s\n", val ? "enabled" : "disabled"); 51 dbgfs_pm->lprx_ena = val; 52 break; 53 case MVM_DEBUGFS_PM_LPRX_RSSI_THRESHOLD: 54 IWL_DEBUG_POWER(mvm, "lprx_rssi_threshold=%d\n", val); 55 dbgfs_pm->lprx_rssi_threshold = val; 56 break; 57 case MVM_DEBUGFS_PM_SNOOZE_ENABLE: 58 IWL_DEBUG_POWER(mvm, "snooze_enable=%d\n", val); 59 dbgfs_pm->snooze_ena = val; 60 break; 61 case MVM_DEBUGFS_PM_UAPSD_MISBEHAVING: 62 IWL_DEBUG_POWER(mvm, "uapsd_misbehaving_enable=%d\n", val); 63 dbgfs_pm->uapsd_misbehaving = val; 64 break; 65 case MVM_DEBUGFS_PM_USE_PS_POLL: 66 IWL_DEBUG_POWER(mvm, "use_ps_poll=%d\n", val); 67 dbgfs_pm->use_ps_poll = val; 68 break; 69 } 70 } 71 72 static ssize_t iwl_dbgfs_pm_params_write(struct ieee80211_vif *vif, char *buf, 73 size_t count, loff_t *ppos) 74 { 75 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 76 struct iwl_mvm *mvm = mvmvif->mvm; 77 enum iwl_dbgfs_pm_mask param; 78 int val, ret; 79 80 if (!strncmp("keep_alive=", buf, 11)) { 81 if (sscanf(buf + 11, "%d", &val) != 1) 82 return -EINVAL; 83 param = MVM_DEBUGFS_PM_KEEP_ALIVE; 84 } else if (!strncmp("skip_over_dtim=", buf, 15)) { 85 if (sscanf(buf + 15, "%d", &val) != 1) 86 return -EINVAL; 87 param = MVM_DEBUGFS_PM_SKIP_OVER_DTIM; 88 } else if (!strncmp("skip_dtim_periods=", buf, 18)) { 89 if (sscanf(buf + 18, "%d", &val) != 1) 90 return -EINVAL; 91 param = MVM_DEBUGFS_PM_SKIP_DTIM_PERIODS; 92 } else if (!strncmp("rx_data_timeout=", buf, 16)) { 93 if (sscanf(buf + 16, "%d", &val) != 1) 94 return -EINVAL; 95 param = MVM_DEBUGFS_PM_RX_DATA_TIMEOUT; 96 } else if (!strncmp("tx_data_timeout=", buf, 16)) { 97 if (sscanf(buf + 16, "%d", &val) != 1) 98 return -EINVAL; 99 param = MVM_DEBUGFS_PM_TX_DATA_TIMEOUT; 100 } else if (!strncmp("lprx=", buf, 5)) { 101 if (sscanf(buf + 5, "%d", &val) != 1) 102 return -EINVAL; 103 param = MVM_DEBUGFS_PM_LPRX_ENA; 104 } else if (!strncmp("lprx_rssi_threshold=", buf, 20)) { 105 if (sscanf(buf + 20, "%d", &val) != 1) 106 return -EINVAL; 107 if (val > POWER_LPRX_RSSI_THRESHOLD_MAX || val < 108 POWER_LPRX_RSSI_THRESHOLD_MIN) 109 return -EINVAL; 110 param = MVM_DEBUGFS_PM_LPRX_RSSI_THRESHOLD; 111 } else if (!strncmp("snooze_enable=", buf, 14)) { 112 if (sscanf(buf + 14, "%d", &val) != 1) 113 return -EINVAL; 114 param = MVM_DEBUGFS_PM_SNOOZE_ENABLE; 115 } else if (!strncmp("uapsd_misbehaving=", buf, 18)) { 116 if (sscanf(buf + 18, "%d", &val) != 1) 117 return -EINVAL; 118 param = MVM_DEBUGFS_PM_UAPSD_MISBEHAVING; 119 } else if (!strncmp("use_ps_poll=", buf, 12)) { 120 if (sscanf(buf + 12, "%d", &val) != 1) 121 return -EINVAL; 122 param = MVM_DEBUGFS_PM_USE_PS_POLL; 123 } else { 124 return -EINVAL; 125 } 126 127 mutex_lock(&mvm->mutex); 128 iwl_dbgfs_update_pm(mvm, vif, param, val); 129 ret = iwl_mvm_power_update_mac(mvm); 130 mutex_unlock(&mvm->mutex); 131 132 return ret ?: count; 133 } 134 135 static ssize_t iwl_dbgfs_tx_pwr_lmt_read(struct file *file, 136 char __user *user_buf, 137 size_t count, loff_t *ppos) 138 { 139 struct ieee80211_vif *vif = file->private_data; 140 char buf[64]; 141 int bufsz = sizeof(buf); 142 int pos; 143 144 pos = scnprintf(buf, bufsz, "bss limit = %d\n", 145 vif->bss_conf.txpower); 146 147 return simple_read_from_buffer(user_buf, count, ppos, buf, pos); 148 } 149 150 static ssize_t iwl_dbgfs_pm_params_read(struct file *file, 151 char __user *user_buf, 152 size_t count, loff_t *ppos) 153 { 154 struct ieee80211_vif *vif = file->private_data; 155 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 156 struct iwl_mvm *mvm = mvmvif->mvm; 157 char buf[512]; 158 int bufsz = sizeof(buf); 159 int pos; 160 161 pos = iwl_mvm_power_mac_dbgfs_read(mvm, vif, buf, bufsz); 162 163 return simple_read_from_buffer(user_buf, count, ppos, buf, pos); 164 } 165 166 static ssize_t iwl_dbgfs_mac_params_read(struct file *file, 167 char __user *user_buf, 168 size_t count, loff_t *ppos) 169 { 170 struct ieee80211_vif *vif = file->private_data; 171 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 172 struct iwl_mvm *mvm = mvmvif->mvm; 173 u8 ap_sta_id; 174 struct ieee80211_chanctx_conf *chanctx_conf; 175 char buf[512]; 176 int bufsz = sizeof(buf); 177 int pos = 0; 178 int i; 179 180 mutex_lock(&mvm->mutex); 181 182 ap_sta_id = mvmvif->ap_sta_id; 183 184 switch (ieee80211_vif_type_p2p(vif)) { 185 case NL80211_IFTYPE_ADHOC: 186 pos += scnprintf(buf+pos, bufsz-pos, "type: ibss\n"); 187 break; 188 case NL80211_IFTYPE_STATION: 189 pos += scnprintf(buf+pos, bufsz-pos, "type: bss\n"); 190 break; 191 case NL80211_IFTYPE_AP: 192 pos += scnprintf(buf+pos, bufsz-pos, "type: ap\n"); 193 break; 194 case NL80211_IFTYPE_P2P_CLIENT: 195 pos += scnprintf(buf+pos, bufsz-pos, "type: p2p client\n"); 196 break; 197 case NL80211_IFTYPE_P2P_GO: 198 pos += scnprintf(buf+pos, bufsz-pos, "type: p2p go\n"); 199 break; 200 case NL80211_IFTYPE_P2P_DEVICE: 201 pos += scnprintf(buf+pos, bufsz-pos, "type: p2p dev\n"); 202 break; 203 default: 204 break; 205 } 206 207 pos += scnprintf(buf+pos, bufsz-pos, "mac id/color: %d / %d\n", 208 mvmvif->id, mvmvif->color); 209 pos += scnprintf(buf+pos, bufsz-pos, "bssid: %pM\n", 210 vif->bss_conf.bssid); 211 pos += scnprintf(buf+pos, bufsz-pos, "Load: %d\n", 212 mvm->tcm.result.load[mvmvif->id]); 213 pos += scnprintf(buf+pos, bufsz-pos, "QoS:\n"); 214 for (i = 0; i < ARRAY_SIZE(mvmvif->queue_params); i++) 215 pos += scnprintf(buf+pos, bufsz-pos, 216 "\t%d: txop:%d - cw_min:%d - cw_max = %d - aifs = %d upasd = %d\n", 217 i, mvmvif->queue_params[i].txop, 218 mvmvif->queue_params[i].cw_min, 219 mvmvif->queue_params[i].cw_max, 220 mvmvif->queue_params[i].aifs, 221 mvmvif->queue_params[i].uapsd); 222 223 if (vif->type == NL80211_IFTYPE_STATION && 224 ap_sta_id != IWL_MVM_INVALID_STA) { 225 struct iwl_mvm_sta *mvm_sta; 226 227 mvm_sta = iwl_mvm_sta_from_staid_protected(mvm, ap_sta_id); 228 if (mvm_sta) { 229 pos += scnprintf(buf+pos, bufsz-pos, 230 "ap_sta_id %d - reduced Tx power %d\n", 231 ap_sta_id, 232 mvm_sta->bt_reduced_txpower); 233 } 234 } 235 236 rcu_read_lock(); 237 chanctx_conf = rcu_dereference(vif->chanctx_conf); 238 if (chanctx_conf) 239 pos += scnprintf(buf+pos, bufsz-pos, 240 "idle rx chains %d, active rx chains: %d\n", 241 chanctx_conf->rx_chains_static, 242 chanctx_conf->rx_chains_dynamic); 243 rcu_read_unlock(); 244 245 mutex_unlock(&mvm->mutex); 246 247 return simple_read_from_buffer(user_buf, count, ppos, buf, pos); 248 } 249 250 static void iwl_dbgfs_update_bf(struct ieee80211_vif *vif, 251 enum iwl_dbgfs_bf_mask param, int value) 252 { 253 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 254 struct iwl_dbgfs_bf *dbgfs_bf = &mvmvif->dbgfs_bf; 255 256 dbgfs_bf->mask |= param; 257 258 switch (param) { 259 case MVM_DEBUGFS_BF_ENERGY_DELTA: 260 dbgfs_bf->bf_energy_delta = value; 261 break; 262 case MVM_DEBUGFS_BF_ROAMING_ENERGY_DELTA: 263 dbgfs_bf->bf_roaming_energy_delta = value; 264 break; 265 case MVM_DEBUGFS_BF_ROAMING_STATE: 266 dbgfs_bf->bf_roaming_state = value; 267 break; 268 case MVM_DEBUGFS_BF_TEMP_THRESHOLD: 269 dbgfs_bf->bf_temp_threshold = value; 270 break; 271 case MVM_DEBUGFS_BF_TEMP_FAST_FILTER: 272 dbgfs_bf->bf_temp_fast_filter = value; 273 break; 274 case MVM_DEBUGFS_BF_TEMP_SLOW_FILTER: 275 dbgfs_bf->bf_temp_slow_filter = value; 276 break; 277 case MVM_DEBUGFS_BF_ENABLE_BEACON_FILTER: 278 dbgfs_bf->bf_enable_beacon_filter = value; 279 break; 280 case MVM_DEBUGFS_BF_DEBUG_FLAG: 281 dbgfs_bf->bf_debug_flag = value; 282 break; 283 case MVM_DEBUGFS_BF_ESCAPE_TIMER: 284 dbgfs_bf->bf_escape_timer = value; 285 break; 286 case MVM_DEBUGFS_BA_ENABLE_BEACON_ABORT: 287 dbgfs_bf->ba_enable_beacon_abort = value; 288 break; 289 case MVM_DEBUGFS_BA_ESCAPE_TIMER: 290 dbgfs_bf->ba_escape_timer = value; 291 break; 292 } 293 } 294 295 static ssize_t iwl_dbgfs_bf_params_write(struct ieee80211_vif *vif, char *buf, 296 size_t count, loff_t *ppos) 297 { 298 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 299 struct iwl_mvm *mvm = mvmvif->mvm; 300 enum iwl_dbgfs_bf_mask param; 301 int value, ret = 0; 302 303 if (!strncmp("bf_energy_delta=", buf, 16)) { 304 if (sscanf(buf+16, "%d", &value) != 1) 305 return -EINVAL; 306 if (value < IWL_BF_ENERGY_DELTA_MIN || 307 value > IWL_BF_ENERGY_DELTA_MAX) 308 return -EINVAL; 309 param = MVM_DEBUGFS_BF_ENERGY_DELTA; 310 } else if (!strncmp("bf_roaming_energy_delta=", buf, 24)) { 311 if (sscanf(buf+24, "%d", &value) != 1) 312 return -EINVAL; 313 if (value < IWL_BF_ROAMING_ENERGY_DELTA_MIN || 314 value > IWL_BF_ROAMING_ENERGY_DELTA_MAX) 315 return -EINVAL; 316 param = MVM_DEBUGFS_BF_ROAMING_ENERGY_DELTA; 317 } else if (!strncmp("bf_roaming_state=", buf, 17)) { 318 if (sscanf(buf+17, "%d", &value) != 1) 319 return -EINVAL; 320 if (value < IWL_BF_ROAMING_STATE_MIN || 321 value > IWL_BF_ROAMING_STATE_MAX) 322 return -EINVAL; 323 param = MVM_DEBUGFS_BF_ROAMING_STATE; 324 } else if (!strncmp("bf_temp_threshold=", buf, 18)) { 325 if (sscanf(buf+18, "%d", &value) != 1) 326 return -EINVAL; 327 if (value < IWL_BF_TEMP_THRESHOLD_MIN || 328 value > IWL_BF_TEMP_THRESHOLD_MAX) 329 return -EINVAL; 330 param = MVM_DEBUGFS_BF_TEMP_THRESHOLD; 331 } else if (!strncmp("bf_temp_fast_filter=", buf, 20)) { 332 if (sscanf(buf+20, "%d", &value) != 1) 333 return -EINVAL; 334 if (value < IWL_BF_TEMP_FAST_FILTER_MIN || 335 value > IWL_BF_TEMP_FAST_FILTER_MAX) 336 return -EINVAL; 337 param = MVM_DEBUGFS_BF_TEMP_FAST_FILTER; 338 } else if (!strncmp("bf_temp_slow_filter=", buf, 20)) { 339 if (sscanf(buf+20, "%d", &value) != 1) 340 return -EINVAL; 341 if (value < IWL_BF_TEMP_SLOW_FILTER_MIN || 342 value > IWL_BF_TEMP_SLOW_FILTER_MAX) 343 return -EINVAL; 344 param = MVM_DEBUGFS_BF_TEMP_SLOW_FILTER; 345 } else if (!strncmp("bf_enable_beacon_filter=", buf, 24)) { 346 if (sscanf(buf+24, "%d", &value) != 1) 347 return -EINVAL; 348 if (value < 0 || value > 1) 349 return -EINVAL; 350 param = MVM_DEBUGFS_BF_ENABLE_BEACON_FILTER; 351 } else if (!strncmp("bf_debug_flag=", buf, 14)) { 352 if (sscanf(buf+14, "%d", &value) != 1) 353 return -EINVAL; 354 if (value < 0 || value > 1) 355 return -EINVAL; 356 param = MVM_DEBUGFS_BF_DEBUG_FLAG; 357 } else if (!strncmp("bf_escape_timer=", buf, 16)) { 358 if (sscanf(buf+16, "%d", &value) != 1) 359 return -EINVAL; 360 if (value < IWL_BF_ESCAPE_TIMER_MIN || 361 value > IWL_BF_ESCAPE_TIMER_MAX) 362 return -EINVAL; 363 param = MVM_DEBUGFS_BF_ESCAPE_TIMER; 364 } else if (!strncmp("ba_escape_timer=", buf, 16)) { 365 if (sscanf(buf+16, "%d", &value) != 1) 366 return -EINVAL; 367 if (value < IWL_BA_ESCAPE_TIMER_MIN || 368 value > IWL_BA_ESCAPE_TIMER_MAX) 369 return -EINVAL; 370 param = MVM_DEBUGFS_BA_ESCAPE_TIMER; 371 } else if (!strncmp("ba_enable_beacon_abort=", buf, 23)) { 372 if (sscanf(buf+23, "%d", &value) != 1) 373 return -EINVAL; 374 if (value < 0 || value > 1) 375 return -EINVAL; 376 param = MVM_DEBUGFS_BA_ENABLE_BEACON_ABORT; 377 } else { 378 return -EINVAL; 379 } 380 381 mutex_lock(&mvm->mutex); 382 iwl_dbgfs_update_bf(vif, param, value); 383 if (param == MVM_DEBUGFS_BF_ENABLE_BEACON_FILTER && !value) 384 ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0); 385 else 386 ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0); 387 mutex_unlock(&mvm->mutex); 388 389 return ret ?: count; 390 } 391 392 static ssize_t iwl_dbgfs_bf_params_read(struct file *file, 393 char __user *user_buf, 394 size_t count, loff_t *ppos) 395 { 396 struct ieee80211_vif *vif = file->private_data; 397 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 398 char buf[256]; 399 int pos = 0; 400 const size_t bufsz = sizeof(buf); 401 struct iwl_beacon_filter_cmd cmd = { 402 IWL_BF_CMD_CONFIG_DEFAULTS, 403 .bf_enable_beacon_filter = 404 cpu_to_le32(IWL_BF_ENABLE_BEACON_FILTER_DEFAULT), 405 .ba_enable_beacon_abort = 406 cpu_to_le32(IWL_BA_ENABLE_BEACON_ABORT_DEFAULT), 407 }; 408 409 iwl_mvm_beacon_filter_debugfs_parameters(vif, &cmd); 410 if (mvmvif->bf_data.bf_enabled) 411 cmd.bf_enable_beacon_filter = cpu_to_le32(1); 412 else 413 cmd.bf_enable_beacon_filter = 0; 414 415 pos += scnprintf(buf+pos, bufsz-pos, "bf_energy_delta = %d\n", 416 le32_to_cpu(cmd.bf_energy_delta)); 417 pos += scnprintf(buf+pos, bufsz-pos, "bf_roaming_energy_delta = %d\n", 418 le32_to_cpu(cmd.bf_roaming_energy_delta)); 419 pos += scnprintf(buf+pos, bufsz-pos, "bf_roaming_state = %d\n", 420 le32_to_cpu(cmd.bf_roaming_state)); 421 pos += scnprintf(buf+pos, bufsz-pos, "bf_temp_threshold = %d\n", 422 le32_to_cpu(cmd.bf_temp_threshold)); 423 pos += scnprintf(buf+pos, bufsz-pos, "bf_temp_fast_filter = %d\n", 424 le32_to_cpu(cmd.bf_temp_fast_filter)); 425 pos += scnprintf(buf+pos, bufsz-pos, "bf_temp_slow_filter = %d\n", 426 le32_to_cpu(cmd.bf_temp_slow_filter)); 427 pos += scnprintf(buf+pos, bufsz-pos, "bf_enable_beacon_filter = %d\n", 428 le32_to_cpu(cmd.bf_enable_beacon_filter)); 429 pos += scnprintf(buf+pos, bufsz-pos, "bf_debug_flag = %d\n", 430 le32_to_cpu(cmd.bf_debug_flag)); 431 pos += scnprintf(buf+pos, bufsz-pos, "bf_escape_timer = %d\n", 432 le32_to_cpu(cmd.bf_escape_timer)); 433 pos += scnprintf(buf+pos, bufsz-pos, "ba_escape_timer = %d\n", 434 le32_to_cpu(cmd.ba_escape_timer)); 435 pos += scnprintf(buf+pos, bufsz-pos, "ba_enable_beacon_abort = %d\n", 436 le32_to_cpu(cmd.ba_enable_beacon_abort)); 437 438 return simple_read_from_buffer(user_buf, count, ppos, buf, pos); 439 } 440 441 static inline char *iwl_dbgfs_is_match(char *name, char *buf) 442 { 443 int len = strlen(name); 444 445 return !strncmp(name, buf, len) ? buf + len : NULL; 446 } 447 448 static ssize_t iwl_dbgfs_os_device_timediff_read(struct file *file, 449 char __user *user_buf, 450 size_t count, loff_t *ppos) 451 { 452 struct ieee80211_vif *vif = file->private_data; 453 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 454 struct iwl_mvm *mvm = mvmvif->mvm; 455 u32 curr_gp2; 456 u64 curr_os; 457 s64 diff; 458 char buf[64]; 459 const size_t bufsz = sizeof(buf); 460 int pos = 0; 461 462 mutex_lock(&mvm->mutex); 463 iwl_mvm_get_sync_time(mvm, CLOCK_BOOTTIME, &curr_gp2, &curr_os, NULL); 464 mutex_unlock(&mvm->mutex); 465 466 do_div(curr_os, NSEC_PER_USEC); 467 diff = curr_os - curr_gp2; 468 pos += scnprintf(buf + pos, bufsz - pos, "diff=%lld\n", diff); 469 470 return simple_read_from_buffer(user_buf, count, ppos, buf, pos); 471 } 472 473 static ssize_t iwl_dbgfs_low_latency_write(struct ieee80211_vif *vif, char *buf, 474 size_t count, loff_t *ppos) 475 { 476 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 477 struct iwl_mvm *mvm = mvmvif->mvm; 478 u8 value; 479 int ret; 480 481 ret = kstrtou8(buf, 0, &value); 482 if (ret) 483 return ret; 484 if (value > 1) 485 return -EINVAL; 486 487 mutex_lock(&mvm->mutex); 488 iwl_mvm_update_low_latency(mvm, vif, value, LOW_LATENCY_DEBUGFS); 489 mutex_unlock(&mvm->mutex); 490 491 return count; 492 } 493 494 static ssize_t 495 iwl_dbgfs_low_latency_force_write(struct ieee80211_vif *vif, char *buf, 496 size_t count, loff_t *ppos) 497 { 498 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 499 struct iwl_mvm *mvm = mvmvif->mvm; 500 u8 value; 501 int ret; 502 503 ret = kstrtou8(buf, 0, &value); 504 if (ret) 505 return ret; 506 507 if (value > NUM_LOW_LATENCY_FORCE) 508 return -EINVAL; 509 510 mutex_lock(&mvm->mutex); 511 if (value == LOW_LATENCY_FORCE_UNSET) { 512 iwl_mvm_update_low_latency(mvm, vif, false, 513 LOW_LATENCY_DEBUGFS_FORCE); 514 iwl_mvm_update_low_latency(mvm, vif, false, 515 LOW_LATENCY_DEBUGFS_FORCE_ENABLE); 516 } else { 517 iwl_mvm_update_low_latency(mvm, vif, 518 value == LOW_LATENCY_FORCE_ON, 519 LOW_LATENCY_DEBUGFS_FORCE); 520 iwl_mvm_update_low_latency(mvm, vif, true, 521 LOW_LATENCY_DEBUGFS_FORCE_ENABLE); 522 } 523 mutex_unlock(&mvm->mutex); 524 return count; 525 } 526 527 static ssize_t iwl_dbgfs_low_latency_read(struct file *file, 528 char __user *user_buf, 529 size_t count, loff_t *ppos) 530 { 531 struct ieee80211_vif *vif = file->private_data; 532 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 533 char format[] = "traffic=%d\ndbgfs=%d\nvcmd=%d\nvif_type=%d\n" 534 "dbgfs_force_enable=%d\ndbgfs_force=%d\nactual=%d\n"; 535 536 /* 537 * all values in format are boolean so the size of format is enough 538 * for holding the result string 539 */ 540 char buf[sizeof(format) + 1] = {}; 541 int len; 542 543 len = scnprintf(buf, sizeof(buf) - 1, format, 544 !!(mvmvif->low_latency & LOW_LATENCY_TRAFFIC), 545 !!(mvmvif->low_latency & LOW_LATENCY_DEBUGFS), 546 !!(mvmvif->low_latency & LOW_LATENCY_VCMD), 547 !!(mvmvif->low_latency & LOW_LATENCY_VIF_TYPE), 548 !!(mvmvif->low_latency & 549 LOW_LATENCY_DEBUGFS_FORCE_ENABLE), 550 !!(mvmvif->low_latency & LOW_LATENCY_DEBUGFS_FORCE), 551 !!(mvmvif->low_latency_actual)); 552 return simple_read_from_buffer(user_buf, count, ppos, buf, len); 553 } 554 555 static ssize_t iwl_dbgfs_uapsd_misbehaving_read(struct file *file, 556 char __user *user_buf, 557 size_t count, loff_t *ppos) 558 { 559 struct ieee80211_vif *vif = file->private_data; 560 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 561 char buf[20]; 562 int len; 563 564 len = sprintf(buf, "%pM\n", mvmvif->uapsd_misbehaving_bssid); 565 return simple_read_from_buffer(user_buf, count, ppos, buf, len); 566 } 567 568 static ssize_t iwl_dbgfs_uapsd_misbehaving_write(struct ieee80211_vif *vif, 569 char *buf, size_t count, 570 loff_t *ppos) 571 { 572 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 573 struct iwl_mvm *mvm = mvmvif->mvm; 574 bool ret; 575 576 mutex_lock(&mvm->mutex); 577 ret = mac_pton(buf, mvmvif->uapsd_misbehaving_bssid); 578 mutex_unlock(&mvm->mutex); 579 580 return ret ? count : -EINVAL; 581 } 582 583 static ssize_t iwl_dbgfs_rx_phyinfo_write(struct ieee80211_vif *vif, char *buf, 584 size_t count, loff_t *ppos) 585 { 586 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 587 struct iwl_mvm *mvm = mvmvif->mvm; 588 struct ieee80211_chanctx_conf *chanctx_conf; 589 struct iwl_mvm_phy_ctxt *phy_ctxt; 590 u16 value; 591 int ret; 592 593 ret = kstrtou16(buf, 0, &value); 594 if (ret) 595 return ret; 596 597 mutex_lock(&mvm->mutex); 598 rcu_read_lock(); 599 600 chanctx_conf = rcu_dereference(vif->chanctx_conf); 601 /* make sure the channel context is assigned */ 602 if (!chanctx_conf) { 603 rcu_read_unlock(); 604 mutex_unlock(&mvm->mutex); 605 return -EINVAL; 606 } 607 608 phy_ctxt = &mvm->phy_ctxts[*(u16 *)chanctx_conf->drv_priv]; 609 rcu_read_unlock(); 610 611 mvm->dbgfs_rx_phyinfo = value; 612 613 ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &chanctx_conf->min_def, 614 chanctx_conf->rx_chains_static, 615 chanctx_conf->rx_chains_dynamic); 616 mutex_unlock(&mvm->mutex); 617 618 return ret ?: count; 619 } 620 621 static ssize_t iwl_dbgfs_rx_phyinfo_read(struct file *file, 622 char __user *user_buf, 623 size_t count, loff_t *ppos) 624 { 625 struct ieee80211_vif *vif = file->private_data; 626 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 627 char buf[8]; 628 int len; 629 630 len = scnprintf(buf, sizeof(buf), "0x%04x\n", 631 mvmvif->mvm->dbgfs_rx_phyinfo); 632 633 return simple_read_from_buffer(user_buf, count, ppos, buf, len); 634 } 635 636 static void iwl_dbgfs_quota_check(void *data, u8 *mac, 637 struct ieee80211_vif *vif) 638 { 639 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 640 int *ret = data; 641 642 if (mvmvif->dbgfs_quota_min) 643 *ret = -EINVAL; 644 } 645 646 static ssize_t iwl_dbgfs_quota_min_write(struct ieee80211_vif *vif, char *buf, 647 size_t count, loff_t *ppos) 648 { 649 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 650 struct iwl_mvm *mvm = mvmvif->mvm; 651 u16 value; 652 int ret; 653 654 ret = kstrtou16(buf, 0, &value); 655 if (ret) 656 return ret; 657 658 if (value > 95) 659 return -EINVAL; 660 661 mutex_lock(&mvm->mutex); 662 663 mvmvif->dbgfs_quota_min = 0; 664 ieee80211_iterate_interfaces(mvm->hw, IEEE80211_IFACE_ITER_NORMAL, 665 iwl_dbgfs_quota_check, &ret); 666 if (ret == 0) { 667 mvmvif->dbgfs_quota_min = value; 668 iwl_mvm_update_quotas(mvm, false, NULL); 669 } 670 mutex_unlock(&mvm->mutex); 671 672 return ret ?: count; 673 } 674 675 static ssize_t iwl_dbgfs_quota_min_read(struct file *file, 676 char __user *user_buf, 677 size_t count, loff_t *ppos) 678 { 679 struct ieee80211_vif *vif = file->private_data; 680 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 681 char buf[10]; 682 int len; 683 684 len = scnprintf(buf, sizeof(buf), "%d\n", mvmvif->dbgfs_quota_min); 685 686 return simple_read_from_buffer(user_buf, count, ppos, buf, len); 687 } 688 689 #define MVM_DEBUGFS_WRITE_FILE_OPS(name, bufsz) \ 690 _MVM_DEBUGFS_WRITE_FILE_OPS(name, bufsz, struct ieee80211_vif) 691 #define MVM_DEBUGFS_READ_WRITE_FILE_OPS(name, bufsz) \ 692 _MVM_DEBUGFS_READ_WRITE_FILE_OPS(name, bufsz, struct ieee80211_vif) 693 #define MVM_DEBUGFS_ADD_FILE_VIF(name, parent, mode) do { \ 694 debugfs_create_file(#name, mode, parent, vif, \ 695 &iwl_dbgfs_##name##_ops); \ 696 } while (0) 697 698 MVM_DEBUGFS_READ_FILE_OPS(mac_params); 699 MVM_DEBUGFS_READ_FILE_OPS(tx_pwr_lmt); 700 MVM_DEBUGFS_READ_WRITE_FILE_OPS(pm_params, 32); 701 MVM_DEBUGFS_READ_WRITE_FILE_OPS(bf_params, 256); 702 MVM_DEBUGFS_READ_WRITE_FILE_OPS(low_latency, 10); 703 MVM_DEBUGFS_WRITE_FILE_OPS(low_latency_force, 10); 704 MVM_DEBUGFS_READ_WRITE_FILE_OPS(uapsd_misbehaving, 20); 705 MVM_DEBUGFS_READ_WRITE_FILE_OPS(rx_phyinfo, 10); 706 MVM_DEBUGFS_READ_WRITE_FILE_OPS(quota_min, 32); 707 MVM_DEBUGFS_READ_FILE_OPS(os_device_timediff); 708 709 710 void iwl_mvm_vif_dbgfs_register(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 711 { 712 struct dentry *dbgfs_dir = vif->debugfs_dir; 713 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 714 char buf[100]; 715 716 /* 717 * Check if debugfs directory already exist before creating it. 718 * This may happen when, for example, resetting hw or suspend-resume 719 */ 720 if (!dbgfs_dir || mvmvif->dbgfs_dir) 721 return; 722 723 mvmvif->dbgfs_dir = debugfs_create_dir("iwlmvm", dbgfs_dir); 724 if (IS_ERR_OR_NULL(mvmvif->dbgfs_dir)) { 725 IWL_ERR(mvm, "Failed to create debugfs directory under %pd\n", 726 dbgfs_dir); 727 return; 728 } 729 730 if (iwlmvm_mod_params.power_scheme != IWL_POWER_SCHEME_CAM && 731 ((vif->type == NL80211_IFTYPE_STATION && !vif->p2p) || 732 (vif->type == NL80211_IFTYPE_STATION && vif->p2p))) 733 MVM_DEBUGFS_ADD_FILE_VIF(pm_params, mvmvif->dbgfs_dir, 0600); 734 735 MVM_DEBUGFS_ADD_FILE_VIF(tx_pwr_lmt, mvmvif->dbgfs_dir, 0400); 736 MVM_DEBUGFS_ADD_FILE_VIF(mac_params, mvmvif->dbgfs_dir, 0400); 737 MVM_DEBUGFS_ADD_FILE_VIF(low_latency, mvmvif->dbgfs_dir, 0600); 738 MVM_DEBUGFS_ADD_FILE_VIF(low_latency_force, mvmvif->dbgfs_dir, 0600); 739 MVM_DEBUGFS_ADD_FILE_VIF(uapsd_misbehaving, mvmvif->dbgfs_dir, 0600); 740 MVM_DEBUGFS_ADD_FILE_VIF(rx_phyinfo, mvmvif->dbgfs_dir, 0600); 741 MVM_DEBUGFS_ADD_FILE_VIF(quota_min, mvmvif->dbgfs_dir, 0600); 742 MVM_DEBUGFS_ADD_FILE_VIF(os_device_timediff, mvmvif->dbgfs_dir, 0400); 743 744 if (vif->type == NL80211_IFTYPE_STATION && !vif->p2p && 745 mvmvif == mvm->bf_allowed_vif) 746 MVM_DEBUGFS_ADD_FILE_VIF(bf_params, mvmvif->dbgfs_dir, 0600); 747 748 /* 749 * Create symlink for convenience pointing to interface specific 750 * debugfs entries for the driver. For example, under 751 * /sys/kernel/debug/iwlwifi/0000\:02\:00.0/iwlmvm/ 752 * find 753 * netdev:wlan0 -> ../../../ieee80211/phy0/netdev:wlan0/iwlmvm/ 754 */ 755 snprintf(buf, 100, "../../../%pd3/%pd", 756 dbgfs_dir, 757 mvmvif->dbgfs_dir); 758 759 mvmvif->dbgfs_slink = debugfs_create_symlink(dbgfs_dir->d_name.name, 760 mvm->debugfs_dir, buf); 761 } 762 763 void iwl_mvm_vif_dbgfs_clean(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 764 { 765 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 766 767 debugfs_remove(mvmvif->dbgfs_slink); 768 mvmvif->dbgfs_slink = NULL; 769 770 debugfs_remove_recursive(mvmvif->dbgfs_dir); 771 mvmvif->dbgfs_dir = NULL; 772 } 773