1/****************************************************************************** 2 * 3 * GPL LICENSE SUMMARY 4 * 5 * Copyright(c) 2008 - 2010 Intel Corporation. All rights reserved. 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of version 2 of the GNU General Public License as 9 * published by the Free Software Foundation. 10 * 11 * This program is distributed in the hope that it will be useful, but 12 * WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write to the Free Software 18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, 19 * USA 20 * 21 * The full GNU General Public License is included in this distribution 22 * in the file called LICENSE.GPL. 23 * 24 * Contact Information: 25 * Intel Linux Wireless <ilw@linux.intel.com> 26 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 27 *****************************************************************************/ 28 29#include <linux/kernel.h> 30#include <linux/module.h> 31#include <linux/etherdevice.h> 32#include <linux/sched.h> 33#include <linux/slab.h> 34#include <net/mac80211.h> 35 36#include "iwl-eeprom.h" 37#include "iwl-dev.h" 38#include "iwl-debug.h" 39#include "iwl-core.h" 40#include "iwl-io.h" 41#include "iwl-power.h" 42#include "iwl-sta.h" 43#include "iwl-helpers.h" 44 45 46MODULE_DESCRIPTION("iwl core"); 47MODULE_VERSION(IWLWIFI_VERSION); 48MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR); 49MODULE_LICENSE("GPL"); 50 51/* 52 * set bt_coex_active to true, uCode will do kill/defer 53 * every time the priority line is asserted (BT is sending signals on the 54 * priority line in the PCIx). 55 * set bt_coex_active to false, uCode will ignore the BT activity and 56 * perform the normal operation 57 * 58 * User might experience transmit issue on some platform due to WiFi/BT 59 * co-exist problem. The possible behaviors are: 60 * Able to scan and finding all the available AP 61 * Not able to associate with any AP 62 * On those platforms, WiFi communication can be restored by set 63 * "bt_coex_active" module parameter to "false" 64 * 65 * default: bt_coex_active = true (BT_COEX_ENABLE) 66 */ 67static bool bt_coex_active = true; 68module_param(bt_coex_active, bool, S_IRUGO); 69MODULE_PARM_DESC(bt_coex_active, "enable wifi/bluetooth co-exist"); 70 71#define IWL_DECLARE_RATE_INFO(r, s, ip, in, rp, rn, pp, np) \ 72 [IWL_RATE_##r##M_INDEX] = { IWL_RATE_##r##M_PLCP, \ 73 IWL_RATE_SISO_##s##M_PLCP, \ 74 IWL_RATE_MIMO2_##s##M_PLCP,\ 75 IWL_RATE_MIMO3_##s##M_PLCP,\ 76 IWL_RATE_##r##M_IEEE, \ 77 IWL_RATE_##ip##M_INDEX, \ 78 IWL_RATE_##in##M_INDEX, \ 79 IWL_RATE_##rp##M_INDEX, \ 80 IWL_RATE_##rn##M_INDEX, \ 81 IWL_RATE_##pp##M_INDEX, \ 82 IWL_RATE_##np##M_INDEX } 83 84u32 iwl_debug_level; 85EXPORT_SYMBOL(iwl_debug_level); 86 87/* 88 * Parameter order: 89 * rate, ht rate, prev rate, next rate, prev tgg rate, next tgg rate 90 * 91 * If there isn't a valid next or previous rate then INV is used which 92 * maps to IWL_RATE_INVALID 93 * 94 */ 95const struct iwl_rate_info iwl_rates[IWL_RATE_COUNT] = { 96 IWL_DECLARE_RATE_INFO(1, INV, INV, 2, INV, 2, INV, 2), /* 1mbps */ 97 IWL_DECLARE_RATE_INFO(2, INV, 1, 5, 1, 5, 1, 5), /* 2mbps */ 98 IWL_DECLARE_RATE_INFO(5, INV, 2, 6, 2, 11, 2, 11), /*5.5mbps */ 99 IWL_DECLARE_RATE_INFO(11, INV, 9, 12, 9, 12, 5, 18), /* 11mbps */ 100 IWL_DECLARE_RATE_INFO(6, 6, 5, 9, 5, 11, 5, 11), /* 6mbps */ 101 IWL_DECLARE_RATE_INFO(9, 6, 6, 11, 6, 11, 5, 11), /* 9mbps */ 102 IWL_DECLARE_RATE_INFO(12, 12, 11, 18, 11, 18, 11, 18), /* 12mbps */ 103 IWL_DECLARE_RATE_INFO(18, 18, 12, 24, 12, 24, 11, 24), /* 18mbps */ 104 IWL_DECLARE_RATE_INFO(24, 24, 18, 36, 18, 36, 18, 36), /* 24mbps */ 105 IWL_DECLARE_RATE_INFO(36, 36, 24, 48, 24, 48, 24, 48), /* 36mbps */ 106 IWL_DECLARE_RATE_INFO(48, 48, 36, 54, 36, 54, 36, 54), /* 48mbps */ 107 IWL_DECLARE_RATE_INFO(54, 54, 48, INV, 48, INV, 48, INV),/* 54mbps */ 108 IWL_DECLARE_RATE_INFO(60, 60, 48, INV, 48, INV, 48, INV),/* 60mbps */ 109}; 110EXPORT_SYMBOL(iwl_rates); 111 112int iwl_hwrate_to_plcp_idx(u32 rate_n_flags) 113{ 114 int idx = 0; 115 116 /* HT rate format */ 117 if (rate_n_flags & RATE_MCS_HT_MSK) { 118 idx = (rate_n_flags & 0xff); 119 120 if (idx >= IWL_RATE_MIMO3_6M_PLCP) 121 idx = idx - IWL_RATE_MIMO3_6M_PLCP; 122 else if (idx >= IWL_RATE_MIMO2_6M_PLCP) 123 idx = idx - IWL_RATE_MIMO2_6M_PLCP; 124 125 idx += IWL_FIRST_OFDM_RATE; 126 /* skip 9M not supported in ht*/ 127 if (idx >= IWL_RATE_9M_INDEX) 128 idx += 1; 129 if ((idx >= IWL_FIRST_OFDM_RATE) && (idx <= IWL_LAST_OFDM_RATE)) 130 return idx; 131 132 /* legacy rate format, search for match in table */ 133 } else { 134 for (idx = 0; idx < ARRAY_SIZE(iwl_rates); idx++) 135 if (iwl_rates[idx].plcp == (rate_n_flags & 0xFF)) 136 return idx; 137 } 138 139 return -1; 140} 141EXPORT_SYMBOL(iwl_hwrate_to_plcp_idx); 142 143u8 iwl_toggle_tx_ant(struct iwl_priv *priv, u8 ant, u8 valid) 144{ 145 int i; 146 u8 ind = ant; 147 148 for (i = 0; i < RATE_ANT_NUM - 1; i++) { 149 ind = (ind + 1) < RATE_ANT_NUM ? ind + 1 : 0; 150 if (valid & BIT(ind)) 151 return ind; 152 } 153 return ant; 154} 155EXPORT_SYMBOL(iwl_toggle_tx_ant); 156 157const u8 iwl_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF }; 158EXPORT_SYMBOL(iwl_bcast_addr); 159 160 161/* This function both allocates and initializes hw and priv. */ 162struct ieee80211_hw *iwl_alloc_all(struct iwl_cfg *cfg, 163 struct ieee80211_ops *hw_ops) 164{ 165 struct iwl_priv *priv; 166 167 /* mac80211 allocates memory for this device instance, including 168 * space for this driver's private structure */ 169 struct ieee80211_hw *hw = 170 ieee80211_alloc_hw(sizeof(struct iwl_priv), hw_ops); 171 if (hw == NULL) { 172 pr_err("%s: Can not allocate network device\n", 173 cfg->name); 174 goto out; 175 } 176 177 priv = hw->priv; 178 priv->hw = hw; 179 180out: 181 return hw; 182} 183EXPORT_SYMBOL(iwl_alloc_all); 184 185void iwl_hw_detect(struct iwl_priv *priv) 186{ 187 priv->hw_rev = _iwl_read32(priv, CSR_HW_REV); 188 priv->hw_wa_rev = _iwl_read32(priv, CSR_HW_REV_WA_REG); 189 pci_read_config_byte(priv->pci_dev, PCI_REVISION_ID, &priv->rev_id); 190} 191EXPORT_SYMBOL(iwl_hw_detect); 192 193/* 194 * QoS support 195*/ 196static void iwl_update_qos(struct iwl_priv *priv) 197{ 198 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) 199 return; 200 201 priv->qos_data.def_qos_parm.qos_flags = 0; 202 203 if (priv->qos_data.qos_active) 204 priv->qos_data.def_qos_parm.qos_flags |= 205 QOS_PARAM_FLG_UPDATE_EDCA_MSK; 206 207 if (priv->current_ht_config.is_ht) 208 priv->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK; 209 210 IWL_DEBUG_QOS(priv, "send QoS cmd with Qos active=%d FLAGS=0x%X\n", 211 priv->qos_data.qos_active, 212 priv->qos_data.def_qos_parm.qos_flags); 213 214 iwl_send_cmd_pdu_async(priv, REPLY_QOS_PARAM, 215 sizeof(struct iwl_qosparam_cmd), 216 &priv->qos_data.def_qos_parm, NULL); 217} 218 219#define MAX_BIT_RATE_40_MHZ 150 /* Mbps */ 220#define MAX_BIT_RATE_20_MHZ 72 /* Mbps */ 221static void iwlcore_init_ht_hw_capab(const struct iwl_priv *priv, 222 struct ieee80211_sta_ht_cap *ht_info, 223 enum ieee80211_band band) 224{ 225 u16 max_bit_rate = 0; 226 u8 rx_chains_num = priv->hw_params.rx_chains_num; 227 u8 tx_chains_num = priv->hw_params.tx_chains_num; 228 229 ht_info->cap = 0; 230 memset(&ht_info->mcs, 0, sizeof(ht_info->mcs)); 231 232 ht_info->ht_supported = true; 233 234 if (priv->cfg->ht_greenfield_support) 235 ht_info->cap |= IEEE80211_HT_CAP_GRN_FLD; 236 ht_info->cap |= IEEE80211_HT_CAP_SGI_20; 237 max_bit_rate = MAX_BIT_RATE_20_MHZ; 238 if (priv->hw_params.ht40_channel & BIT(band)) { 239 ht_info->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40; 240 ht_info->cap |= IEEE80211_HT_CAP_SGI_40; 241 ht_info->mcs.rx_mask[4] = 0x01; 242 max_bit_rate = MAX_BIT_RATE_40_MHZ; 243 } 244 245 if (priv->cfg->mod_params->amsdu_size_8K) 246 ht_info->cap |= IEEE80211_HT_CAP_MAX_AMSDU; 247 248 ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF; 249 ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF; 250 251 ht_info->mcs.rx_mask[0] = 0xFF; 252 if (rx_chains_num >= 2) 253 ht_info->mcs.rx_mask[1] = 0xFF; 254 if (rx_chains_num >= 3) 255 ht_info->mcs.rx_mask[2] = 0xFF; 256 257 /* Highest supported Rx data rate */ 258 max_bit_rate *= rx_chains_num; 259 WARN_ON(max_bit_rate & ~IEEE80211_HT_MCS_RX_HIGHEST_MASK); 260 ht_info->mcs.rx_highest = cpu_to_le16(max_bit_rate); 261 262 /* Tx MCS capabilities */ 263 ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED; 264 if (tx_chains_num != rx_chains_num) { 265 ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF; 266 ht_info->mcs.tx_params |= ((tx_chains_num - 1) << 267 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT); 268 } 269} 270 271/** 272 * iwlcore_init_geos - Initialize mac80211's geo/channel info based from eeprom 273 */ 274int iwlcore_init_geos(struct iwl_priv *priv) 275{ 276 struct iwl_channel_info *ch; 277 struct ieee80211_supported_band *sband; 278 struct ieee80211_channel *channels; 279 struct ieee80211_channel *geo_ch; 280 struct ieee80211_rate *rates; 281 int i = 0; 282 283 if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates || 284 priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) { 285 IWL_DEBUG_INFO(priv, "Geography modes already initialized.\n"); 286 set_bit(STATUS_GEO_CONFIGURED, &priv->status); 287 return 0; 288 } 289 290 channels = kzalloc(sizeof(struct ieee80211_channel) * 291 priv->channel_count, GFP_KERNEL); 292 if (!channels) 293 return -ENOMEM; 294 295 rates = kzalloc((sizeof(struct ieee80211_rate) * IWL_RATE_COUNT_LEGACY), 296 GFP_KERNEL); 297 if (!rates) { 298 kfree(channels); 299 return -ENOMEM; 300 } 301 302 /* 5.2GHz channels start after the 2.4GHz channels */ 303 sband = &priv->bands[IEEE80211_BAND_5GHZ]; 304 sband->channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)]; 305 /* just OFDM */ 306 sband->bitrates = &rates[IWL_FIRST_OFDM_RATE]; 307 sband->n_bitrates = IWL_RATE_COUNT_LEGACY - IWL_FIRST_OFDM_RATE; 308 309 if (priv->cfg->sku & IWL_SKU_N) 310 iwlcore_init_ht_hw_capab(priv, &sband->ht_cap, 311 IEEE80211_BAND_5GHZ); 312 313 sband = &priv->bands[IEEE80211_BAND_2GHZ]; 314 sband->channels = channels; 315 /* OFDM & CCK */ 316 sband->bitrates = rates; 317 sband->n_bitrates = IWL_RATE_COUNT_LEGACY; 318 319 if (priv->cfg->sku & IWL_SKU_N) 320 iwlcore_init_ht_hw_capab(priv, &sband->ht_cap, 321 IEEE80211_BAND_2GHZ); 322 323 priv->ieee_channels = channels; 324 priv->ieee_rates = rates; 325 326 for (i = 0; i < priv->channel_count; i++) { 327 ch = &priv->channel_info[i]; 328 329 if (!is_channel_valid(ch)) 330 continue; 331 332 if (is_channel_a_band(ch)) 333 sband = &priv->bands[IEEE80211_BAND_5GHZ]; 334 else 335 sband = &priv->bands[IEEE80211_BAND_2GHZ]; 336 337 geo_ch = &sband->channels[sband->n_channels++]; 338 339 geo_ch->center_freq = 340 ieee80211_channel_to_frequency(ch->channel); 341 geo_ch->max_power = ch->max_power_avg; 342 geo_ch->max_antenna_gain = 0xff; 343 geo_ch->hw_value = ch->channel; 344 345 if (is_channel_valid(ch)) { 346 if (!(ch->flags & EEPROM_CHANNEL_IBSS)) 347 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS; 348 349 if (!(ch->flags & EEPROM_CHANNEL_ACTIVE)) 350 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN; 351 352 if (ch->flags & EEPROM_CHANNEL_RADAR) 353 geo_ch->flags |= IEEE80211_CHAN_RADAR; 354 355 geo_ch->flags |= ch->ht40_extension_channel; 356 357 if (ch->max_power_avg > priv->tx_power_device_lmt) 358 priv->tx_power_device_lmt = ch->max_power_avg; 359 } else { 360 geo_ch->flags |= IEEE80211_CHAN_DISABLED; 361 } 362 363 IWL_DEBUG_INFO(priv, "Channel %d Freq=%d[%sGHz] %s flag=0x%X\n", 364 ch->channel, geo_ch->center_freq, 365 is_channel_a_band(ch) ? "5.2" : "2.4", 366 geo_ch->flags & IEEE80211_CHAN_DISABLED ? 367 "restricted" : "valid", 368 geo_ch->flags); 369 } 370 371 if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) && 372 priv->cfg->sku & IWL_SKU_A) { 373 IWL_INFO(priv, "Incorrectly detected BG card as ABG. " 374 "Please send your PCI ID 0x%04X:0x%04X to maintainer.\n", 375 priv->pci_dev->device, 376 priv->pci_dev->subsystem_device); 377 priv->cfg->sku &= ~IWL_SKU_A; 378 } 379 380 IWL_INFO(priv, "Tunable channels: %d 802.11bg, %d 802.11a channels\n", 381 priv->bands[IEEE80211_BAND_2GHZ].n_channels, 382 priv->bands[IEEE80211_BAND_5GHZ].n_channels); 383 384 set_bit(STATUS_GEO_CONFIGURED, &priv->status); 385 386 return 0; 387} 388EXPORT_SYMBOL(iwlcore_init_geos); 389 390/* 391 * iwlcore_free_geos - undo allocations in iwlcore_init_geos 392 */ 393void iwlcore_free_geos(struct iwl_priv *priv) 394{ 395 kfree(priv->ieee_channels); 396 kfree(priv->ieee_rates); 397 clear_bit(STATUS_GEO_CONFIGURED, &priv->status); 398} 399EXPORT_SYMBOL(iwlcore_free_geos); 400 401/* 402 * iwlcore_tx_cmd_protection: Set rts/cts. 3945 and 4965 only share this 403 * function. 404 */ 405void iwlcore_tx_cmd_protection(struct iwl_priv *priv, 406 struct ieee80211_tx_info *info, 407 __le16 fc, __le32 *tx_flags) 408{ 409 if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) { 410 *tx_flags |= TX_CMD_FLG_RTS_MSK; 411 *tx_flags &= ~TX_CMD_FLG_CTS_MSK; 412 *tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK; 413 414 if (!ieee80211_is_mgmt(fc)) 415 return; 416 417 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) { 418 case cpu_to_le16(IEEE80211_STYPE_AUTH): 419 case cpu_to_le16(IEEE80211_STYPE_DEAUTH): 420 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ): 421 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ): 422 *tx_flags &= ~TX_CMD_FLG_RTS_MSK; 423 *tx_flags |= TX_CMD_FLG_CTS_MSK; 424 break; 425 } 426 } else if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) { 427 *tx_flags &= ~TX_CMD_FLG_RTS_MSK; 428 *tx_flags |= TX_CMD_FLG_CTS_MSK; 429 *tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK; 430 } 431} 432EXPORT_SYMBOL(iwlcore_tx_cmd_protection); 433 434 435static bool is_single_rx_stream(struct iwl_priv *priv) 436{ 437 return priv->current_ht_config.smps == IEEE80211_SMPS_STATIC || 438 priv->current_ht_config.single_chain_sufficient; 439} 440 441static u8 iwl_is_channel_extension(struct iwl_priv *priv, 442 enum ieee80211_band band, 443 u16 channel, u8 extension_chan_offset) 444{ 445 const struct iwl_channel_info *ch_info; 446 447 ch_info = iwl_get_channel_info(priv, band, channel); 448 if (!is_channel_valid(ch_info)) 449 return 0; 450 451 if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE) 452 return !(ch_info->ht40_extension_channel & 453 IEEE80211_CHAN_NO_HT40PLUS); 454 else if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW) 455 return !(ch_info->ht40_extension_channel & 456 IEEE80211_CHAN_NO_HT40MINUS); 457 458 return 0; 459} 460 461u8 iwl_is_ht40_tx_allowed(struct iwl_priv *priv, 462 struct ieee80211_sta_ht_cap *sta_ht_inf) 463{ 464 struct iwl_ht_config *ht_conf = &priv->current_ht_config; 465 466 if (!ht_conf->is_ht || !ht_conf->is_40mhz) 467 return 0; 468 469 /* We do not check for IEEE80211_HT_CAP_SUP_WIDTH_20_40 470 * the bit will not set if it is pure 40MHz case 471 */ 472 if (sta_ht_inf) { 473 if (!sta_ht_inf->ht_supported) 474 return 0; 475 } 476#ifdef CONFIG_IWLWIFI_DEBUGFS 477 if (priv->disable_ht40) 478 return 0; 479#endif 480 return iwl_is_channel_extension(priv, priv->band, 481 le16_to_cpu(priv->staging_rxon.channel), 482 ht_conf->extension_chan_offset); 483} 484EXPORT_SYMBOL(iwl_is_ht40_tx_allowed); 485 486static u16 iwl_adjust_beacon_interval(u16 beacon_val, u16 max_beacon_val) 487{ 488 u16 new_val = 0; 489 u16 beacon_factor = 0; 490 491 beacon_factor = (beacon_val + max_beacon_val) / max_beacon_val; 492 new_val = beacon_val / beacon_factor; 493 494 if (!new_val) 495 new_val = max_beacon_val; 496 497 return new_val; 498} 499 500void iwl_setup_rxon_timing(struct iwl_priv *priv, struct ieee80211_vif *vif) 501{ 502 u64 tsf; 503 s32 interval_tm, rem; 504 unsigned long flags; 505 struct ieee80211_conf *conf = NULL; 506 u16 beacon_int; 507 508 conf = ieee80211_get_hw_conf(priv->hw); 509 510 spin_lock_irqsave(&priv->lock, flags); 511 priv->rxon_timing.timestamp = cpu_to_le64(priv->timestamp); 512 priv->rxon_timing.listen_interval = cpu_to_le16(conf->listen_interval); 513 514 beacon_int = vif->bss_conf.beacon_int; 515 516 if (vif->type == NL80211_IFTYPE_ADHOC) { 517 /* TODO: we need to get atim_window from upper stack 518 * for now we set to 0 */ 519 priv->rxon_timing.atim_window = 0; 520 } else { 521 priv->rxon_timing.atim_window = 0; 522 } 523 524 beacon_int = iwl_adjust_beacon_interval(beacon_int, 525 priv->hw_params.max_beacon_itrvl * TIME_UNIT); 526 priv->rxon_timing.beacon_interval = cpu_to_le16(beacon_int); 527 528 tsf = priv->timestamp; /* tsf is modifed by do_div: copy it */ 529 interval_tm = beacon_int * TIME_UNIT; 530 rem = do_div(tsf, interval_tm); 531 priv->rxon_timing.beacon_init_val = cpu_to_le32(interval_tm - rem); 532 533 spin_unlock_irqrestore(&priv->lock, flags); 534 IWL_DEBUG_ASSOC(priv, 535 "beacon interval %d beacon timer %d beacon tim %d\n", 536 le16_to_cpu(priv->rxon_timing.beacon_interval), 537 le32_to_cpu(priv->rxon_timing.beacon_init_val), 538 le16_to_cpu(priv->rxon_timing.atim_window)); 539} 540EXPORT_SYMBOL(iwl_setup_rxon_timing); 541 542void iwl_set_rxon_hwcrypto(struct iwl_priv *priv, int hw_decrypt) 543{ 544 struct iwl_rxon_cmd *rxon = &priv->staging_rxon; 545 546 if (hw_decrypt) 547 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK; 548 else 549 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK; 550 551} 552EXPORT_SYMBOL(iwl_set_rxon_hwcrypto); 553 554/** 555 * iwl_check_rxon_cmd - validate RXON structure is valid 556 * 557 * NOTE: This is really only useful during development and can eventually 558 * be #ifdef'd out once the driver is stable and folks aren't actively 559 * making changes 560 */ 561int iwl_check_rxon_cmd(struct iwl_priv *priv) 562{ 563 int error = 0; 564 int counter = 1; 565 struct iwl_rxon_cmd *rxon = &priv->staging_rxon; 566 567 if (rxon->flags & RXON_FLG_BAND_24G_MSK) { 568 error |= le32_to_cpu(rxon->flags & 569 (RXON_FLG_TGJ_NARROW_BAND_MSK | 570 RXON_FLG_RADAR_DETECT_MSK)); 571 if (error) 572 IWL_WARN(priv, "check 24G fields %d | %d\n", 573 counter++, error); 574 } else { 575 error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ? 576 0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK); 577 if (error) 578 IWL_WARN(priv, "check 52 fields %d | %d\n", 579 counter++, error); 580 error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK); 581 if (error) 582 IWL_WARN(priv, "check 52 CCK %d | %d\n", 583 counter++, error); 584 } 585 error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1; 586 if (error) 587 IWL_WARN(priv, "check mac addr %d | %d\n", counter++, error); 588 589 /* make sure basic rates 6Mbps and 1Mbps are supported */ 590 error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) && 591 ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0)); 592 if (error) 593 IWL_WARN(priv, "check basic rate %d | %d\n", counter++, error); 594 595 error |= (le16_to_cpu(rxon->assoc_id) > 2007); 596 if (error) 597 IWL_WARN(priv, "check assoc id %d | %d\n", counter++, error); 598 599 error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK)) 600 == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK)); 601 if (error) 602 IWL_WARN(priv, "check CCK and short slot %d | %d\n", 603 counter++, error); 604 605 error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK)) 606 == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK)); 607 if (error) 608 IWL_WARN(priv, "check CCK & auto detect %d | %d\n", 609 counter++, error); 610 611 error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK | 612 RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK); 613 if (error) 614 IWL_WARN(priv, "check TGG and auto detect %d | %d\n", 615 counter++, error); 616 617 if (error) 618 IWL_WARN(priv, "Tuning to channel %d\n", 619 le16_to_cpu(rxon->channel)); 620 621 if (error) { 622 IWL_ERR(priv, "Not a valid iwl_rxon_assoc_cmd field values\n"); 623 return -1; 624 } 625 return 0; 626} 627EXPORT_SYMBOL(iwl_check_rxon_cmd); 628 629/** 630 * iwl_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed 631 * @priv: staging_rxon is compared to active_rxon 632 * 633 * If the RXON structure is changing enough to require a new tune, 634 * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that 635 * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required. 636 */ 637int iwl_full_rxon_required(struct iwl_priv *priv) 638{ 639 640 /* These items are only settable from the full RXON command */ 641 if (!(iwl_is_associated(priv)) || 642 compare_ether_addr(priv->staging_rxon.bssid_addr, 643 priv->active_rxon.bssid_addr) || 644 compare_ether_addr(priv->staging_rxon.node_addr, 645 priv->active_rxon.node_addr) || 646 compare_ether_addr(priv->staging_rxon.wlap_bssid_addr, 647 priv->active_rxon.wlap_bssid_addr) || 648 (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) || 649 (priv->staging_rxon.channel != priv->active_rxon.channel) || 650 (priv->staging_rxon.air_propagation != 651 priv->active_rxon.air_propagation) || 652 (priv->staging_rxon.ofdm_ht_single_stream_basic_rates != 653 priv->active_rxon.ofdm_ht_single_stream_basic_rates) || 654 (priv->staging_rxon.ofdm_ht_dual_stream_basic_rates != 655 priv->active_rxon.ofdm_ht_dual_stream_basic_rates) || 656 (priv->staging_rxon.ofdm_ht_triple_stream_basic_rates != 657 priv->active_rxon.ofdm_ht_triple_stream_basic_rates) || 658 (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id)) 659 return 1; 660 661 /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can 662 * be updated with the RXON_ASSOC command -- however only some 663 * flag transitions are allowed using RXON_ASSOC */ 664 665 /* Check if we are not switching bands */ 666 if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) != 667 (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)) 668 return 1; 669 670 /* Check if we are switching association toggle */ 671 if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) != 672 (priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK)) 673 return 1; 674 675 return 0; 676} 677EXPORT_SYMBOL(iwl_full_rxon_required); 678 679u8 iwl_rate_get_lowest_plcp(struct iwl_priv *priv) 680{ 681 /* 682 * Assign the lowest rate -- should really get this from 683 * the beacon skb from mac80211. 684 */ 685 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) 686 return IWL_RATE_1M_PLCP; 687 else 688 return IWL_RATE_6M_PLCP; 689} 690EXPORT_SYMBOL(iwl_rate_get_lowest_plcp); 691 692void iwl_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_config *ht_conf) 693{ 694 struct iwl_rxon_cmd *rxon = &priv->staging_rxon; 695 696 if (!ht_conf->is_ht) { 697 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK | 698 RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK | 699 RXON_FLG_HT40_PROT_MSK | 700 RXON_FLG_HT_PROT_MSK); 701 return; 702 } 703 704 rxon->flags |= cpu_to_le32(ht_conf->ht_protection << RXON_FLG_HT_OPERATING_MODE_POS); 705 706 /* Set up channel bandwidth: 707 * 20 MHz only, 20/40 mixed or pure 40 if ht40 ok */ 708 /* clear the HT channel mode before set the mode */ 709 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK | 710 RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK); 711 if (iwl_is_ht40_tx_allowed(priv, NULL)) { 712 /* pure ht40 */ 713 if (ht_conf->ht_protection == IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) { 714 rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40; 715 /* Note: control channel is opposite of extension channel */ 716 switch (ht_conf->extension_chan_offset) { 717 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 718 rxon->flags &= ~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK; 719 break; 720 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 721 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK; 722 break; 723 } 724 } else { 725 /* Note: control channel is opposite of extension channel */ 726 switch (ht_conf->extension_chan_offset) { 727 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 728 rxon->flags &= ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK); 729 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED; 730 break; 731 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 732 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK; 733 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED; 734 break; 735 case IEEE80211_HT_PARAM_CHA_SEC_NONE: 736 default: 737 /* channel location only valid if in Mixed mode */ 738 IWL_ERR(priv, "invalid extension channel offset\n"); 739 break; 740 } 741 } 742 } else { 743 rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY; 744 } 745 746 if (priv->cfg->ops->hcmd->set_rxon_chain) 747 priv->cfg->ops->hcmd->set_rxon_chain(priv); 748 749 IWL_DEBUG_ASSOC(priv, "rxon flags 0x%X operation mode :0x%X " 750 "extension channel offset 0x%x\n", 751 le32_to_cpu(rxon->flags), ht_conf->ht_protection, 752 ht_conf->extension_chan_offset); 753} 754EXPORT_SYMBOL(iwl_set_rxon_ht); 755 756#define IWL_NUM_RX_CHAINS_MULTIPLE 3 757#define IWL_NUM_RX_CHAINS_SINGLE 2 758#define IWL_NUM_IDLE_CHAINS_DUAL 2 759#define IWL_NUM_IDLE_CHAINS_SINGLE 1 760 761/* 762 * Determine how many receiver/antenna chains to use. 763 * 764 * More provides better reception via diversity. Fewer saves power 765 * at the expense of throughput, but only when not in powersave to 766 * start with. 767 * 768 * MIMO (dual stream) requires at least 2, but works better with 3. 769 * This does not determine *which* chains to use, just how many. 770 */ 771static int iwl_get_active_rx_chain_count(struct iwl_priv *priv) 772{ 773 /* # of Rx chains to use when expecting MIMO. */ 774 if (is_single_rx_stream(priv)) 775 return IWL_NUM_RX_CHAINS_SINGLE; 776 else 777 return IWL_NUM_RX_CHAINS_MULTIPLE; 778} 779 780/* 781 * When we are in power saving mode, unless device support spatial 782 * multiplexing power save, use the active count for rx chain count. 783 */ 784static int iwl_get_idle_rx_chain_count(struct iwl_priv *priv, int active_cnt) 785{ 786 /* # Rx chains when idling, depending on SMPS mode */ 787 switch (priv->current_ht_config.smps) { 788 case IEEE80211_SMPS_STATIC: 789 case IEEE80211_SMPS_DYNAMIC: 790 return IWL_NUM_IDLE_CHAINS_SINGLE; 791 case IEEE80211_SMPS_OFF: 792 return active_cnt; 793 default: 794 WARN(1, "invalid SMPS mode %d", 795 priv->current_ht_config.smps); 796 return active_cnt; 797 } 798} 799 800/* up to 4 chains */ 801static u8 iwl_count_chain_bitmap(u32 chain_bitmap) 802{ 803 u8 res; 804 res = (chain_bitmap & BIT(0)) >> 0; 805 res += (chain_bitmap & BIT(1)) >> 1; 806 res += (chain_bitmap & BIT(2)) >> 2; 807 res += (chain_bitmap & BIT(3)) >> 3; 808 return res; 809} 810 811/** 812 * iwl_set_rxon_chain - Set up Rx chain usage in "staging" RXON image 813 * 814 * Selects how many and which Rx receivers/antennas/chains to use. 815 * This should not be used for scan command ... it puts data in wrong place. 816 */ 817void iwl_set_rxon_chain(struct iwl_priv *priv) 818{ 819 bool is_single = is_single_rx_stream(priv); 820 bool is_cam = !test_bit(STATUS_POWER_PMI, &priv->status); 821 u8 idle_rx_cnt, active_rx_cnt, valid_rx_cnt; 822 u32 active_chains; 823 u16 rx_chain; 824 825 /* Tell uCode which antennas are actually connected. 826 * Before first association, we assume all antennas are connected. 827 * Just after first association, iwl_chain_noise_calibration() 828 * checks which antennas actually *are* connected. */ 829 if (priv->chain_noise_data.active_chains) 830 active_chains = priv->chain_noise_data.active_chains; 831 else 832 active_chains = priv->hw_params.valid_rx_ant; 833 834 rx_chain = active_chains << RXON_RX_CHAIN_VALID_POS; 835 836 /* How many receivers should we use? */ 837 active_rx_cnt = iwl_get_active_rx_chain_count(priv); 838 idle_rx_cnt = iwl_get_idle_rx_chain_count(priv, active_rx_cnt); 839 840 841 /* correct rx chain count according hw settings 842 * and chain noise calibration 843 */ 844 valid_rx_cnt = iwl_count_chain_bitmap(active_chains); 845 if (valid_rx_cnt < active_rx_cnt) 846 active_rx_cnt = valid_rx_cnt; 847 848 if (valid_rx_cnt < idle_rx_cnt) 849 idle_rx_cnt = valid_rx_cnt; 850 851 rx_chain |= active_rx_cnt << RXON_RX_CHAIN_MIMO_CNT_POS; 852 rx_chain |= idle_rx_cnt << RXON_RX_CHAIN_CNT_POS; 853 854 priv->staging_rxon.rx_chain = cpu_to_le16(rx_chain); 855 856 if (!is_single && (active_rx_cnt >= IWL_NUM_RX_CHAINS_SINGLE) && is_cam) 857 priv->staging_rxon.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK; 858 else 859 priv->staging_rxon.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK; 860 861 IWL_DEBUG_ASSOC(priv, "rx_chain=0x%X active=%d idle=%d\n", 862 priv->staging_rxon.rx_chain, 863 active_rx_cnt, idle_rx_cnt); 864 865 WARN_ON(active_rx_cnt == 0 || idle_rx_cnt == 0 || 866 active_rx_cnt < idle_rx_cnt); 867} 868EXPORT_SYMBOL(iwl_set_rxon_chain); 869 870/* Return valid channel */ 871u8 iwl_get_single_channel_number(struct iwl_priv *priv, 872 enum ieee80211_band band) 873{ 874 const struct iwl_channel_info *ch_info; 875 int i; 876 u8 channel = 0; 877 878 /* only scan single channel, good enough to reset the RF */ 879 /* pick the first valid not in-use channel */ 880 if (band == IEEE80211_BAND_5GHZ) { 881 for (i = 14; i < priv->channel_count; i++) { 882 if (priv->channel_info[i].channel != 883 le16_to_cpu(priv->staging_rxon.channel)) { 884 channel = priv->channel_info[i].channel; 885 ch_info = iwl_get_channel_info(priv, 886 band, channel); 887 if (is_channel_valid(ch_info)) 888 break; 889 } 890 } 891 } else { 892 for (i = 0; i < 14; i++) { 893 if (priv->channel_info[i].channel != 894 le16_to_cpu(priv->staging_rxon.channel)) { 895 channel = 896 priv->channel_info[i].channel; 897 ch_info = iwl_get_channel_info(priv, 898 band, channel); 899 if (is_channel_valid(ch_info)) 900 break; 901 } 902 } 903 } 904 905 return channel; 906} 907EXPORT_SYMBOL(iwl_get_single_channel_number); 908 909/** 910 * iwl_set_rxon_channel - Set the phymode and channel values in staging RXON 911 * @phymode: MODE_IEEE80211A sets to 5.2GHz; all else set to 2.4GHz 912 * @channel: Any channel valid for the requested phymode 913 914 * In addition to setting the staging RXON, priv->phymode is also set. 915 * 916 * NOTE: Does not commit to the hardware; it sets appropriate bit fields 917 * in the staging RXON flag structure based on the phymode 918 */ 919int iwl_set_rxon_channel(struct iwl_priv *priv, struct ieee80211_channel *ch) 920{ 921 enum ieee80211_band band = ch->band; 922 u16 channel = ieee80211_frequency_to_channel(ch->center_freq); 923 924 if (!iwl_get_channel_info(priv, band, channel)) { 925 IWL_DEBUG_INFO(priv, "Could not set channel to %d [%d]\n", 926 channel, band); 927 return -EINVAL; 928 } 929 930 if ((le16_to_cpu(priv->staging_rxon.channel) == channel) && 931 (priv->band == band)) 932 return 0; 933 934 priv->staging_rxon.channel = cpu_to_le16(channel); 935 if (band == IEEE80211_BAND_5GHZ) 936 priv->staging_rxon.flags &= ~RXON_FLG_BAND_24G_MSK; 937 else 938 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK; 939 940 priv->band = band; 941 942 IWL_DEBUG_INFO(priv, "Staging channel set to %d [%d]\n", channel, band); 943 944 return 0; 945} 946EXPORT_SYMBOL(iwl_set_rxon_channel); 947 948void iwl_set_flags_for_band(struct iwl_priv *priv, 949 enum ieee80211_band band, 950 struct ieee80211_vif *vif) 951{ 952 if (band == IEEE80211_BAND_5GHZ) { 953 priv->staging_rxon.flags &= 954 ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK 955 | RXON_FLG_CCK_MSK); 956 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK; 957 } else { 958 /* Copied from iwl_post_associate() */ 959 if (vif && vif->bss_conf.use_short_slot) 960 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK; 961 else 962 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK; 963 964 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK; 965 priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK; 966 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK; 967 } 968} 969EXPORT_SYMBOL(iwl_set_flags_for_band); 970 971/* 972 * initialize rxon structure with default values from eeprom 973 */ 974void iwl_connection_init_rx_config(struct iwl_priv *priv, 975 struct ieee80211_vif *vif) 976{ 977 const struct iwl_channel_info *ch_info; 978 enum nl80211_iftype type = NL80211_IFTYPE_STATION; 979 980 if (vif) 981 type = vif->type; 982 983 memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon)); 984 985 switch (type) { 986 case NL80211_IFTYPE_AP: 987 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP; 988 break; 989 990 case NL80211_IFTYPE_STATION: 991 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS; 992 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK; 993 break; 994 995 case NL80211_IFTYPE_ADHOC: 996 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS; 997 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK; 998 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK | 999 RXON_FILTER_ACCEPT_GRP_MSK; 1000 break; 1001 1002 default: 1003 IWL_ERR(priv, "Unsupported interface type %d\n", type); 1004 break; 1005 } 1006 1007 1008 ch_info = iwl_get_channel_info(priv, priv->band, 1009 le16_to_cpu(priv->active_rxon.channel)); 1010 1011 if (!ch_info) 1012 ch_info = &priv->channel_info[0]; 1013 1014 priv->staging_rxon.channel = cpu_to_le16(ch_info->channel); 1015 priv->band = ch_info->band; 1016 1017 iwl_set_flags_for_band(priv, priv->band, vif); 1018 1019 priv->staging_rxon.ofdm_basic_rates = 1020 (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF; 1021 priv->staging_rxon.cck_basic_rates = 1022 (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF; 1023 1024 /* clear both MIX and PURE40 mode flag */ 1025 priv->staging_rxon.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED | 1026 RXON_FLG_CHANNEL_MODE_PURE_40); 1027 1028 if (vif) 1029 memcpy(priv->staging_rxon.node_addr, vif->addr, ETH_ALEN); 1030 1031 priv->staging_rxon.ofdm_ht_single_stream_basic_rates = 0xff; 1032 priv->staging_rxon.ofdm_ht_dual_stream_basic_rates = 0xff; 1033 priv->staging_rxon.ofdm_ht_triple_stream_basic_rates = 0xff; 1034} 1035EXPORT_SYMBOL(iwl_connection_init_rx_config); 1036 1037void iwl_set_rate(struct iwl_priv *priv) 1038{ 1039 const struct ieee80211_supported_band *hw = NULL; 1040 struct ieee80211_rate *rate; 1041 int i; 1042 1043 hw = iwl_get_hw_mode(priv, priv->band); 1044 if (!hw) { 1045 IWL_ERR(priv, "Failed to set rate: unable to get hw mode\n"); 1046 return; 1047 } 1048 1049 priv->active_rate = 0; 1050 1051 for (i = 0; i < hw->n_bitrates; i++) { 1052 rate = &(hw->bitrates[i]); 1053 if (rate->hw_value < IWL_RATE_COUNT_LEGACY) 1054 priv->active_rate |= (1 << rate->hw_value); 1055 } 1056 1057 IWL_DEBUG_RATE(priv, "Set active_rate = %0x\n", priv->active_rate); 1058 1059 priv->staging_rxon.cck_basic_rates = 1060 (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF; 1061 1062 priv->staging_rxon.ofdm_basic_rates = 1063 (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF; 1064} 1065EXPORT_SYMBOL(iwl_set_rate); 1066 1067void iwl_chswitch_done(struct iwl_priv *priv, bool is_success) 1068{ 1069 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) 1070 return; 1071 1072 if (priv->switch_rxon.switch_in_progress) { 1073 ieee80211_chswitch_done(priv->vif, is_success); 1074 mutex_lock(&priv->mutex); 1075 priv->switch_rxon.switch_in_progress = false; 1076 mutex_unlock(&priv->mutex); 1077 } 1078} 1079EXPORT_SYMBOL(iwl_chswitch_done); 1080 1081void iwl_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb) 1082{ 1083 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1084 struct iwl_rxon_cmd *rxon = (void *)&priv->active_rxon; 1085 struct iwl_csa_notification *csa = &(pkt->u.csa_notif); 1086 1087 if (priv->switch_rxon.switch_in_progress) { 1088 if (!le32_to_cpu(csa->status) && 1089 (csa->channel == priv->switch_rxon.channel)) { 1090 rxon->channel = csa->channel; 1091 priv->staging_rxon.channel = csa->channel; 1092 IWL_DEBUG_11H(priv, "CSA notif: channel %d\n", 1093 le16_to_cpu(csa->channel)); 1094 iwl_chswitch_done(priv, true); 1095 } else { 1096 IWL_ERR(priv, "CSA notif (fail) : channel %d\n", 1097 le16_to_cpu(csa->channel)); 1098 iwl_chswitch_done(priv, false); 1099 } 1100 } 1101} 1102EXPORT_SYMBOL(iwl_rx_csa); 1103 1104#ifdef CONFIG_IWLWIFI_DEBUG 1105void iwl_print_rx_config_cmd(struct iwl_priv *priv) 1106{ 1107 struct iwl_rxon_cmd *rxon = &priv->staging_rxon; 1108 1109 IWL_DEBUG_RADIO(priv, "RX CONFIG:\n"); 1110 iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon)); 1111 IWL_DEBUG_RADIO(priv, "u16 channel: 0x%x\n", le16_to_cpu(rxon->channel)); 1112 IWL_DEBUG_RADIO(priv, "u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags)); 1113 IWL_DEBUG_RADIO(priv, "u32 filter_flags: 0x%08x\n", 1114 le32_to_cpu(rxon->filter_flags)); 1115 IWL_DEBUG_RADIO(priv, "u8 dev_type: 0x%x\n", rxon->dev_type); 1116 IWL_DEBUG_RADIO(priv, "u8 ofdm_basic_rates: 0x%02x\n", 1117 rxon->ofdm_basic_rates); 1118 IWL_DEBUG_RADIO(priv, "u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates); 1119 IWL_DEBUG_RADIO(priv, "u8[6] node_addr: %pM\n", rxon->node_addr); 1120 IWL_DEBUG_RADIO(priv, "u8[6] bssid_addr: %pM\n", rxon->bssid_addr); 1121 IWL_DEBUG_RADIO(priv, "u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id)); 1122} 1123EXPORT_SYMBOL(iwl_print_rx_config_cmd); 1124#endif 1125/** 1126 * iwl_irq_handle_error - called for HW or SW error interrupt from card 1127 */ 1128void iwl_irq_handle_error(struct iwl_priv *priv) 1129{ 1130 /* Set the FW error flag -- cleared on iwl_down */ 1131 set_bit(STATUS_FW_ERROR, &priv->status); 1132 1133 /* Cancel currently queued command. */ 1134 clear_bit(STATUS_HCMD_ACTIVE, &priv->status); 1135 1136 IWL_ERR(priv, "Loaded firmware version: %s\n", 1137 priv->hw->wiphy->fw_version); 1138 1139 priv->cfg->ops->lib->dump_nic_error_log(priv); 1140 if (priv->cfg->ops->lib->dump_csr) 1141 priv->cfg->ops->lib->dump_csr(priv); 1142 if (priv->cfg->ops->lib->dump_fh) 1143 priv->cfg->ops->lib->dump_fh(priv, NULL, false); 1144 priv->cfg->ops->lib->dump_nic_event_log(priv, false, NULL, false); 1145#ifdef CONFIG_IWLWIFI_DEBUG 1146 if (iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) 1147 iwl_print_rx_config_cmd(priv); 1148#endif 1149 1150 wake_up_interruptible(&priv->wait_command_queue); 1151 1152 /* Keep the restart process from trying to send host 1153 * commands by clearing the INIT status bit */ 1154 clear_bit(STATUS_READY, &priv->status); 1155 1156 if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) { 1157 IWL_DEBUG(priv, IWL_DL_FW_ERRORS, 1158 "Restarting adapter due to uCode error.\n"); 1159 1160 if (priv->cfg->mod_params->restart_fw) 1161 queue_work(priv->workqueue, &priv->restart); 1162 } 1163} 1164EXPORT_SYMBOL(iwl_irq_handle_error); 1165 1166static int iwl_apm_stop_master(struct iwl_priv *priv) 1167{ 1168 int ret = 0; 1169 1170 /* stop device's busmaster DMA activity */ 1171 iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER); 1172 1173 ret = iwl_poll_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_MASTER_DISABLED, 1174 CSR_RESET_REG_FLAG_MASTER_DISABLED, 100); 1175 if (ret) 1176 IWL_WARN(priv, "Master Disable Timed Out, 100 usec\n"); 1177 1178 IWL_DEBUG_INFO(priv, "stop master\n"); 1179 1180 return ret; 1181} 1182 1183void iwl_apm_stop(struct iwl_priv *priv) 1184{ 1185 IWL_DEBUG_INFO(priv, "Stop card, put in low power state\n"); 1186 1187 /* Stop device's DMA activity */ 1188 iwl_apm_stop_master(priv); 1189 1190 /* Reset the entire device */ 1191 iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET); 1192 1193 udelay(10); 1194 1195 /* 1196 * Clear "initialization complete" bit to move adapter from 1197 * D0A* (powered-up Active) --> D0U* (Uninitialized) state. 1198 */ 1199 iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE); 1200} 1201EXPORT_SYMBOL(iwl_apm_stop); 1202 1203 1204/* 1205 * Start up NIC's basic functionality after it has been reset 1206 * (e.g. after platform boot, or shutdown via iwl_apm_stop()) 1207 * NOTE: This does not load uCode nor start the embedded processor 1208 */ 1209int iwl_apm_init(struct iwl_priv *priv) 1210{ 1211 int ret = 0; 1212 u16 lctl; 1213 1214 IWL_DEBUG_INFO(priv, "Init card's basic functions\n"); 1215 1216 /* 1217 * Use "set_bit" below rather than "write", to preserve any hardware 1218 * bits already set by default after reset. 1219 */ 1220 1221 /* Disable L0S exit timer (platform NMI Work/Around) */ 1222 iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS, 1223 CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER); 1224 1225 /* 1226 * Disable L0s without affecting L1; 1227 * don't wait for ICH L0s (ICH bug W/A) 1228 */ 1229 iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS, 1230 CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX); 1231 1232 /* Set FH wait threshold to maximum (HW error during stress W/A) */ 1233 iwl_set_bit(priv, CSR_DBG_HPET_MEM_REG, CSR_DBG_HPET_MEM_REG_VAL); 1234 1235 /* 1236 * Enable HAP INTA (interrupt from management bus) to 1237 * wake device's PCI Express link L1a -> L0s 1238 * NOTE: This is no-op for 3945 (non-existant bit) 1239 */ 1240 iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG, 1241 CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A); 1242 1243 /* 1244 * HW bug W/A for instability in PCIe bus L0->L0S->L1 transition. 1245 * Check if BIOS (or OS) enabled L1-ASPM on this device. 1246 * If so (likely), disable L0S, so device moves directly L0->L1; 1247 * costs negligible amount of power savings. 1248 * If not (unlikely), enable L0S, so there is at least some 1249 * power savings, even without L1. 1250 */ 1251 if (priv->cfg->set_l0s) { 1252 lctl = iwl_pcie_link_ctl(priv); 1253 if ((lctl & PCI_CFG_LINK_CTRL_VAL_L1_EN) == 1254 PCI_CFG_LINK_CTRL_VAL_L1_EN) { 1255 /* L1-ASPM enabled; disable(!) L0S */ 1256 iwl_set_bit(priv, CSR_GIO_REG, 1257 CSR_GIO_REG_VAL_L0S_ENABLED); 1258 IWL_DEBUG_POWER(priv, "L1 Enabled; Disabling L0S\n"); 1259 } else { 1260 /* L1-ASPM disabled; enable(!) L0S */ 1261 iwl_clear_bit(priv, CSR_GIO_REG, 1262 CSR_GIO_REG_VAL_L0S_ENABLED); 1263 IWL_DEBUG_POWER(priv, "L1 Disabled; Enabling L0S\n"); 1264 } 1265 } 1266 1267 /* Configure analog phase-lock-loop before activating to D0A */ 1268 if (priv->cfg->pll_cfg_val) 1269 iwl_set_bit(priv, CSR_ANA_PLL_CFG, priv->cfg->pll_cfg_val); 1270 1271 /* 1272 * Set "initialization complete" bit to move adapter from 1273 * D0U* --> D0A* (powered-up active) state. 1274 */ 1275 iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE); 1276 1277 /* 1278 * Wait for clock stabilization; once stabilized, access to 1279 * device-internal resources is supported, e.g. iwl_write_prph() 1280 * and accesses to uCode SRAM. 1281 */ 1282 ret = iwl_poll_bit(priv, CSR_GP_CNTRL, 1283 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 1284 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000); 1285 if (ret < 0) { 1286 IWL_DEBUG_INFO(priv, "Failed to init the card\n"); 1287 goto out; 1288 } 1289 1290 /* 1291 * Enable DMA and BSM (if used) clocks, wait for them to stabilize. 1292 * BSM (Boostrap State Machine) is only in 3945 and 4965; 1293 * later devices (i.e. 5000 and later) have non-volatile SRAM, 1294 * and don't need BSM to restore data after power-saving sleep. 1295 * 1296 * Write to "CLK_EN_REG"; "1" bits enable clocks, while "0" bits 1297 * do not disable clocks. This preserves any hardware bits already 1298 * set by default in "CLK_CTRL_REG" after reset. 1299 */ 1300 if (priv->cfg->use_bsm) 1301 iwl_write_prph(priv, APMG_CLK_EN_REG, 1302 APMG_CLK_VAL_DMA_CLK_RQT | APMG_CLK_VAL_BSM_CLK_RQT); 1303 else 1304 iwl_write_prph(priv, APMG_CLK_EN_REG, 1305 APMG_CLK_VAL_DMA_CLK_RQT); 1306 udelay(20); 1307 1308 /* Disable L1-Active */ 1309 iwl_set_bits_prph(priv, APMG_PCIDEV_STT_REG, 1310 APMG_PCIDEV_STT_VAL_L1_ACT_DIS); 1311 1312out: 1313 return ret; 1314} 1315EXPORT_SYMBOL(iwl_apm_init); 1316 1317 1318int iwl_set_hw_params(struct iwl_priv *priv) 1319{ 1320 priv->hw_params.max_rxq_size = RX_QUEUE_SIZE; 1321 priv->hw_params.max_rxq_log = RX_QUEUE_SIZE_LOG; 1322 if (priv->cfg->mod_params->amsdu_size_8K) 1323 priv->hw_params.rx_page_order = get_order(IWL_RX_BUF_SIZE_8K); 1324 else 1325 priv->hw_params.rx_page_order = get_order(IWL_RX_BUF_SIZE_4K); 1326 1327 priv->hw_params.max_beacon_itrvl = IWL_MAX_UCODE_BEACON_INTERVAL; 1328 1329 if (priv->cfg->mod_params->disable_11n) 1330 priv->cfg->sku &= ~IWL_SKU_N; 1331 1332 /* Device-specific setup */ 1333 return priv->cfg->ops->lib->set_hw_params(priv); 1334} 1335EXPORT_SYMBOL(iwl_set_hw_params); 1336 1337int iwl_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force) 1338{ 1339 int ret = 0; 1340 s8 prev_tx_power = priv->tx_power_user_lmt; 1341 1342 if (tx_power < IWLAGN_TX_POWER_TARGET_POWER_MIN) { 1343 IWL_WARN(priv, 1344 "Requested user TXPOWER %d below lower limit %d.\n", 1345 tx_power, 1346 IWLAGN_TX_POWER_TARGET_POWER_MIN); 1347 return -EINVAL; 1348 } 1349 1350 if (tx_power > priv->tx_power_device_lmt) { 1351 IWL_WARN(priv, 1352 "Requested user TXPOWER %d above upper limit %d.\n", 1353 tx_power, priv->tx_power_device_lmt); 1354 return -EINVAL; 1355 } 1356 1357 if (priv->tx_power_user_lmt != tx_power) 1358 force = true; 1359 1360 /* if nic is not up don't send command */ 1361 if (iwl_is_ready_rf(priv)) { 1362 priv->tx_power_user_lmt = tx_power; 1363 if (force && priv->cfg->ops->lib->send_tx_power) 1364 ret = priv->cfg->ops->lib->send_tx_power(priv); 1365 else if (!priv->cfg->ops->lib->send_tx_power) 1366 ret = -EOPNOTSUPP; 1367 /* 1368 * if fail to set tx_power, restore the orig. tx power 1369 */ 1370 if (ret) 1371 priv->tx_power_user_lmt = prev_tx_power; 1372 } 1373 1374 /* 1375 * Even this is an async host command, the command 1376 * will always report success from uCode 1377 * So once driver can placing the command into the queue 1378 * successfully, driver can use priv->tx_power_user_lmt 1379 * to reflect the current tx power 1380 */ 1381 return ret; 1382} 1383EXPORT_SYMBOL(iwl_set_tx_power); 1384 1385irqreturn_t iwl_isr_legacy(int irq, void *data) 1386{ 1387 struct iwl_priv *priv = data; 1388 u32 inta, inta_mask; 1389 u32 inta_fh; 1390 unsigned long flags; 1391 if (!priv) 1392 return IRQ_NONE; 1393 1394 spin_lock_irqsave(&priv->lock, flags); 1395 1396 /* Disable (but don't clear!) interrupts here to avoid 1397 * back-to-back ISRs and sporadic interrupts from our NIC. 1398 * If we have something to service, the tasklet will re-enable ints. 1399 * If we *don't* have something, we'll re-enable before leaving here. */ 1400 inta_mask = iwl_read32(priv, CSR_INT_MASK); /* just for debug */ 1401 iwl_write32(priv, CSR_INT_MASK, 0x00000000); 1402 1403 /* Discover which interrupts are active/pending */ 1404 inta = iwl_read32(priv, CSR_INT); 1405 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS); 1406 1407 /* Ignore interrupt if there's nothing in NIC to service. 1408 * This may be due to IRQ shared with another device, 1409 * or due to sporadic interrupts thrown from our NIC. */ 1410 if (!inta && !inta_fh) { 1411 IWL_DEBUG_ISR(priv, "Ignore interrupt, inta == 0, inta_fh == 0\n"); 1412 goto none; 1413 } 1414 1415 if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) { 1416 /* Hardware disappeared. It might have already raised 1417 * an interrupt */ 1418 IWL_WARN(priv, "HARDWARE GONE?? INTA == 0x%08x\n", inta); 1419 goto unplugged; 1420 } 1421 1422 IWL_DEBUG_ISR(priv, "ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n", 1423 inta, inta_mask, inta_fh); 1424 1425 inta &= ~CSR_INT_BIT_SCD; 1426 1427 /* iwl_irq_tasklet() will service interrupts and re-enable them */ 1428 if (likely(inta || inta_fh)) 1429 tasklet_schedule(&priv->irq_tasklet); 1430 1431 unplugged: 1432 spin_unlock_irqrestore(&priv->lock, flags); 1433 return IRQ_HANDLED; 1434 1435 none: 1436 /* re-enable interrupts here since we don't have anything to service. */ 1437 /* only Re-enable if diabled by irq */ 1438 if (test_bit(STATUS_INT_ENABLED, &priv->status)) 1439 iwl_enable_interrupts(priv); 1440 spin_unlock_irqrestore(&priv->lock, flags); 1441 return IRQ_NONE; 1442} 1443EXPORT_SYMBOL(iwl_isr_legacy); 1444 1445void iwl_send_bt_config(struct iwl_priv *priv) 1446{ 1447 struct iwl_bt_cmd bt_cmd = { 1448 .lead_time = BT_LEAD_TIME_DEF, 1449 .max_kill = BT_MAX_KILL_DEF, 1450 .kill_ack_mask = 0, 1451 .kill_cts_mask = 0, 1452 }; 1453 1454 if (!bt_coex_active) 1455 bt_cmd.flags = BT_COEX_DISABLE; 1456 else 1457 bt_cmd.flags = BT_COEX_ENABLE; 1458 1459 IWL_DEBUG_INFO(priv, "BT coex %s\n", 1460 (bt_cmd.flags == BT_COEX_DISABLE) ? "disable" : "active"); 1461 1462 if (iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG, 1463 sizeof(struct iwl_bt_cmd), &bt_cmd)) 1464 IWL_ERR(priv, "failed to send BT Coex Config\n"); 1465} 1466EXPORT_SYMBOL(iwl_send_bt_config); 1467 1468int iwl_send_statistics_request(struct iwl_priv *priv, u8 flags, bool clear) 1469{ 1470 struct iwl_statistics_cmd statistics_cmd = { 1471 .configuration_flags = 1472 clear ? IWL_STATS_CONF_CLEAR_STATS : 0, 1473 }; 1474 1475 if (flags & CMD_ASYNC) 1476 return iwl_send_cmd_pdu_async(priv, REPLY_STATISTICS_CMD, 1477 sizeof(struct iwl_statistics_cmd), 1478 &statistics_cmd, NULL); 1479 else 1480 return iwl_send_cmd_pdu(priv, REPLY_STATISTICS_CMD, 1481 sizeof(struct iwl_statistics_cmd), 1482 &statistics_cmd); 1483} 1484EXPORT_SYMBOL(iwl_send_statistics_request); 1485 1486void iwl_rf_kill_ct_config(struct iwl_priv *priv) 1487{ 1488 struct iwl_ct_kill_config cmd; 1489 struct iwl_ct_kill_throttling_config adv_cmd; 1490 unsigned long flags; 1491 int ret = 0; 1492 1493 spin_lock_irqsave(&priv->lock, flags); 1494 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, 1495 CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT); 1496 spin_unlock_irqrestore(&priv->lock, flags); 1497 priv->thermal_throttle.ct_kill_toggle = false; 1498 1499 if (priv->cfg->support_ct_kill_exit) { 1500 adv_cmd.critical_temperature_enter = 1501 cpu_to_le32(priv->hw_params.ct_kill_threshold); 1502 adv_cmd.critical_temperature_exit = 1503 cpu_to_le32(priv->hw_params.ct_kill_exit_threshold); 1504 1505 ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD, 1506 sizeof(adv_cmd), &adv_cmd); 1507 if (ret) 1508 IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n"); 1509 else 1510 IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD " 1511 "succeeded, " 1512 "critical temperature enter is %d," 1513 "exit is %d\n", 1514 priv->hw_params.ct_kill_threshold, 1515 priv->hw_params.ct_kill_exit_threshold); 1516 } else { 1517 cmd.critical_temperature_R = 1518 cpu_to_le32(priv->hw_params.ct_kill_threshold); 1519 1520 ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD, 1521 sizeof(cmd), &cmd); 1522 if (ret) 1523 IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n"); 1524 else 1525 IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD " 1526 "succeeded, " 1527 "critical temperature is %d\n", 1528 priv->hw_params.ct_kill_threshold); 1529 } 1530} 1531EXPORT_SYMBOL(iwl_rf_kill_ct_config); 1532 1533 1534/* 1535 * CARD_STATE_CMD 1536 * 1537 * Use: Sets the device's internal card state to enable, disable, or halt 1538 * 1539 * When in the 'enable' state the card operates as normal. 1540 * When in the 'disable' state, the card enters into a low power mode. 1541 * When in the 'halt' state, the card is shut down and must be fully 1542 * restarted to come back on. 1543 */ 1544int iwl_send_card_state(struct iwl_priv *priv, u32 flags, u8 meta_flag) 1545{ 1546 struct iwl_host_cmd cmd = { 1547 .id = REPLY_CARD_STATE_CMD, 1548 .len = sizeof(u32), 1549 .data = &flags, 1550 .flags = meta_flag, 1551 }; 1552 1553 return iwl_send_cmd(priv, &cmd); 1554} 1555 1556void iwl_rx_pm_sleep_notif(struct iwl_priv *priv, 1557 struct iwl_rx_mem_buffer *rxb) 1558{ 1559#ifdef CONFIG_IWLWIFI_DEBUG 1560 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1561 struct iwl_sleep_notification *sleep = &(pkt->u.sleep_notif); 1562 IWL_DEBUG_RX(priv, "sleep mode: %d, src: %d\n", 1563 sleep->pm_sleep_mode, sleep->pm_wakeup_src); 1564#endif 1565} 1566EXPORT_SYMBOL(iwl_rx_pm_sleep_notif); 1567 1568void iwl_rx_pm_debug_statistics_notif(struct iwl_priv *priv, 1569 struct iwl_rx_mem_buffer *rxb) 1570{ 1571 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1572 u32 len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK; 1573 IWL_DEBUG_RADIO(priv, "Dumping %d bytes of unhandled " 1574 "notification for %s:\n", len, 1575 get_cmd_string(pkt->hdr.cmd)); 1576 iwl_print_hex_dump(priv, IWL_DL_RADIO, pkt->u.raw, len); 1577} 1578EXPORT_SYMBOL(iwl_rx_pm_debug_statistics_notif); 1579 1580void iwl_rx_reply_error(struct iwl_priv *priv, 1581 struct iwl_rx_mem_buffer *rxb) 1582{ 1583 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1584 1585 IWL_ERR(priv, "Error Reply type 0x%08X cmd %s (0x%02X) " 1586 "seq 0x%04X ser 0x%08X\n", 1587 le32_to_cpu(pkt->u.err_resp.error_type), 1588 get_cmd_string(pkt->u.err_resp.cmd_id), 1589 pkt->u.err_resp.cmd_id, 1590 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num), 1591 le32_to_cpu(pkt->u.err_resp.error_info)); 1592} 1593EXPORT_SYMBOL(iwl_rx_reply_error); 1594 1595void iwl_clear_isr_stats(struct iwl_priv *priv) 1596{ 1597 memset(&priv->isr_stats, 0, sizeof(priv->isr_stats)); 1598} 1599 1600int iwl_mac_conf_tx(struct ieee80211_hw *hw, u16 queue, 1601 const struct ieee80211_tx_queue_params *params) 1602{ 1603 struct iwl_priv *priv = hw->priv; 1604 unsigned long flags; 1605 int q; 1606 1607 IWL_DEBUG_MAC80211(priv, "enter\n"); 1608 1609 if (!iwl_is_ready_rf(priv)) { 1610 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n"); 1611 return -EIO; 1612 } 1613 1614 if (queue >= AC_NUM) { 1615 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue); 1616 return 0; 1617 } 1618 1619 q = AC_NUM - 1 - queue; 1620 1621 spin_lock_irqsave(&priv->lock, flags); 1622 1623 priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min); 1624 priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max); 1625 priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs; 1626 priv->qos_data.def_qos_parm.ac[q].edca_txop = 1627 cpu_to_le16((params->txop * 32)); 1628 1629 priv->qos_data.def_qos_parm.ac[q].reserved1 = 0; 1630 1631 spin_unlock_irqrestore(&priv->lock, flags); 1632 1633 IWL_DEBUG_MAC80211(priv, "leave\n"); 1634 return 0; 1635} 1636EXPORT_SYMBOL(iwl_mac_conf_tx); 1637 1638static void iwl_ht_conf(struct iwl_priv *priv, 1639 struct ieee80211_vif *vif) 1640{ 1641 struct iwl_ht_config *ht_conf = &priv->current_ht_config; 1642 struct ieee80211_sta *sta; 1643 struct ieee80211_bss_conf *bss_conf = &vif->bss_conf; 1644 1645 IWL_DEBUG_MAC80211(priv, "enter:\n"); 1646 1647 if (!ht_conf->is_ht) 1648 return; 1649 1650 ht_conf->ht_protection = 1651 bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_PROTECTION; 1652 ht_conf->non_GF_STA_present = 1653 !!(bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT); 1654 1655 ht_conf->single_chain_sufficient = false; 1656 1657 switch (vif->type) { 1658 case NL80211_IFTYPE_STATION: 1659 rcu_read_lock(); 1660 sta = ieee80211_find_sta(vif, bss_conf->bssid); 1661 if (sta) { 1662 struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap; 1663 int maxstreams; 1664 1665 maxstreams = (ht_cap->mcs.tx_params & 1666 IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK) 1667 >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT; 1668 maxstreams += 1; 1669 1670 if ((ht_cap->mcs.rx_mask[1] == 0) && 1671 (ht_cap->mcs.rx_mask[2] == 0)) 1672 ht_conf->single_chain_sufficient = true; 1673 if (maxstreams <= 1) 1674 ht_conf->single_chain_sufficient = true; 1675 } else { 1676 /* 1677 * If at all, this can only happen through a race 1678 * when the AP disconnects us while we're still 1679 * setting up the connection, in that case mac80211 1680 * will soon tell us about that. 1681 */ 1682 ht_conf->single_chain_sufficient = true; 1683 } 1684 rcu_read_unlock(); 1685 break; 1686 case NL80211_IFTYPE_ADHOC: 1687 ht_conf->single_chain_sufficient = true; 1688 break; 1689 default: 1690 break; 1691 } 1692 1693 IWL_DEBUG_MAC80211(priv, "leave\n"); 1694} 1695 1696static inline void iwl_set_no_assoc(struct iwl_priv *priv) 1697{ 1698 iwl_led_disassociate(priv); 1699 /* 1700 * inform the ucode that there is no longer an 1701 * association and that no more packets should be 1702 * sent 1703 */ 1704 priv->staging_rxon.filter_flags &= 1705 ~RXON_FILTER_ASSOC_MSK; 1706 priv->staging_rxon.assoc_id = 0; 1707 iwlcore_commit_rxon(priv); 1708} 1709 1710static int iwl_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb) 1711{ 1712 struct iwl_priv *priv = hw->priv; 1713 unsigned long flags; 1714 __le64 timestamp; 1715 1716 IWL_DEBUG_MAC80211(priv, "enter\n"); 1717 1718 if (!iwl_is_ready_rf(priv)) { 1719 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n"); 1720 return -EIO; 1721 } 1722 1723 spin_lock_irqsave(&priv->lock, flags); 1724 1725 if (priv->ibss_beacon) 1726 dev_kfree_skb(priv->ibss_beacon); 1727 1728 priv->ibss_beacon = skb; 1729 1730 timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp; 1731 priv->timestamp = le64_to_cpu(timestamp); 1732 1733 IWL_DEBUG_MAC80211(priv, "leave\n"); 1734 spin_unlock_irqrestore(&priv->lock, flags); 1735 1736 priv->cfg->ops->lib->post_associate(priv, priv->vif); 1737 1738 return 0; 1739} 1740 1741void iwl_bss_info_changed(struct ieee80211_hw *hw, 1742 struct ieee80211_vif *vif, 1743 struct ieee80211_bss_conf *bss_conf, 1744 u32 changes) 1745{ 1746 struct iwl_priv *priv = hw->priv; 1747 int ret; 1748 1749 IWL_DEBUG_MAC80211(priv, "changes = 0x%X\n", changes); 1750 1751 if (!iwl_is_alive(priv)) 1752 return; 1753 1754 mutex_lock(&priv->mutex); 1755 1756 if (changes & BSS_CHANGED_QOS) { 1757 unsigned long flags; 1758 1759 spin_lock_irqsave(&priv->lock, flags); 1760 priv->qos_data.qos_active = bss_conf->qos; 1761 iwl_update_qos(priv); 1762 spin_unlock_irqrestore(&priv->lock, flags); 1763 } 1764 1765 if (changes & BSS_CHANGED_BEACON && vif->type == NL80211_IFTYPE_AP) { 1766 dev_kfree_skb(priv->ibss_beacon); 1767 priv->ibss_beacon = ieee80211_beacon_get(hw, vif); 1768 } 1769 1770 if (changes & BSS_CHANGED_BEACON_INT) { 1771 /* TODO: in AP mode, do something to make this take effect */ 1772 } 1773 1774 if (changes & BSS_CHANGED_BSSID) { 1775 IWL_DEBUG_MAC80211(priv, "BSSID %pM\n", bss_conf->bssid); 1776 1777 /* 1778 * If there is currently a HW scan going on in the 1779 * background then we need to cancel it else the RXON 1780 * below/in post_associate will fail. 1781 */ 1782 if (iwl_scan_cancel_timeout(priv, 100)) { 1783 IWL_WARN(priv, "Aborted scan still in progress after 100ms\n"); 1784 IWL_DEBUG_MAC80211(priv, "leaving - scan abort failed.\n"); 1785 mutex_unlock(&priv->mutex); 1786 return; 1787 } 1788 1789 /* mac80211 only sets assoc when in STATION mode */ 1790 if (vif->type == NL80211_IFTYPE_ADHOC || bss_conf->assoc) { 1791 memcpy(priv->staging_rxon.bssid_addr, 1792 bss_conf->bssid, ETH_ALEN); 1793 1794 /* currently needed in a few places */ 1795 memcpy(priv->bssid, bss_conf->bssid, ETH_ALEN); 1796 } else { 1797 priv->staging_rxon.filter_flags &= 1798 ~RXON_FILTER_ASSOC_MSK; 1799 } 1800 1801 } 1802 1803 /* 1804 * This needs to be after setting the BSSID in case 1805 * mac80211 decides to do both changes at once because 1806 * it will invoke post_associate. 1807 */ 1808 if (vif->type == NL80211_IFTYPE_ADHOC && 1809 changes & BSS_CHANGED_BEACON) { 1810 struct sk_buff *beacon = ieee80211_beacon_get(hw, vif); 1811 1812 if (beacon) 1813 iwl_mac_beacon_update(hw, beacon); 1814 } 1815 1816 if (changes & BSS_CHANGED_ERP_PREAMBLE) { 1817 IWL_DEBUG_MAC80211(priv, "ERP_PREAMBLE %d\n", 1818 bss_conf->use_short_preamble); 1819 if (bss_conf->use_short_preamble) 1820 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK; 1821 else 1822 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK; 1823 } 1824 1825 if (changes & BSS_CHANGED_ERP_CTS_PROT) { 1826 IWL_DEBUG_MAC80211(priv, "ERP_CTS %d\n", bss_conf->use_cts_prot); 1827 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ)) 1828 priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK; 1829 else 1830 priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK; 1831 if (bss_conf->use_cts_prot) 1832 priv->staging_rxon.flags |= RXON_FLG_SELF_CTS_EN; 1833 else 1834 priv->staging_rxon.flags &= ~RXON_FLG_SELF_CTS_EN; 1835 } 1836 1837 if (changes & BSS_CHANGED_BASIC_RATES) { 1838 } 1839 1840 if (changes & BSS_CHANGED_HT) { 1841 iwl_ht_conf(priv, vif); 1842 1843 if (priv->cfg->ops->hcmd->set_rxon_chain) 1844 priv->cfg->ops->hcmd->set_rxon_chain(priv); 1845 } 1846 1847 if (changes & BSS_CHANGED_ASSOC) { 1848 IWL_DEBUG_MAC80211(priv, "ASSOC %d\n", bss_conf->assoc); 1849 if (bss_conf->assoc) { 1850 priv->timestamp = bss_conf->timestamp; 1851 1852 iwl_led_associate(priv); 1853 1854 if (!iwl_is_rfkill(priv)) 1855 priv->cfg->ops->lib->post_associate(priv, vif); 1856 } else 1857 iwl_set_no_assoc(priv); 1858 } 1859 1860 if (changes && iwl_is_associated(priv) && bss_conf->aid) { 1861 IWL_DEBUG_MAC80211(priv, "Changes (%#x) while associated\n", 1862 changes); 1863 ret = iwl_send_rxon_assoc(priv); 1864 if (!ret) { 1865 /* Sync active_rxon with latest change. */ 1866 memcpy((void *)&priv->active_rxon, 1867 &priv->staging_rxon, 1868 sizeof(struct iwl_rxon_cmd)); 1869 } 1870 } 1871 1872 if (changes & BSS_CHANGED_BEACON_ENABLED) { 1873 if (vif->bss_conf.enable_beacon) { 1874 memcpy(priv->staging_rxon.bssid_addr, 1875 bss_conf->bssid, ETH_ALEN); 1876 memcpy(priv->bssid, bss_conf->bssid, ETH_ALEN); 1877 iwlcore_config_ap(priv, vif); 1878 } else 1879 iwl_set_no_assoc(priv); 1880 } 1881 1882 if (changes & BSS_CHANGED_IBSS) { 1883 ret = priv->cfg->ops->lib->manage_ibss_station(priv, vif, 1884 bss_conf->ibss_joined); 1885 if (ret) 1886 IWL_ERR(priv, "failed to %s IBSS station %pM\n", 1887 bss_conf->ibss_joined ? "add" : "remove", 1888 bss_conf->bssid); 1889 } 1890 1891 mutex_unlock(&priv->mutex); 1892 1893 IWL_DEBUG_MAC80211(priv, "leave\n"); 1894} 1895EXPORT_SYMBOL(iwl_bss_info_changed); 1896 1897static int iwl_set_mode(struct iwl_priv *priv, struct ieee80211_vif *vif) 1898{ 1899 iwl_connection_init_rx_config(priv, vif); 1900 1901 if (priv->cfg->ops->hcmd->set_rxon_chain) 1902 priv->cfg->ops->hcmd->set_rxon_chain(priv); 1903 1904 return iwlcore_commit_rxon(priv); 1905} 1906 1907int iwl_mac_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif) 1908{ 1909 struct iwl_priv *priv = hw->priv; 1910 int err = 0; 1911 1912 IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n", 1913 vif->type, vif->addr); 1914 1915 mutex_lock(&priv->mutex); 1916 1917 if (WARN_ON(!iwl_is_ready_rf(priv))) { 1918 err = -EINVAL; 1919 goto out; 1920 } 1921 1922 if (priv->vif) { 1923 IWL_DEBUG_MAC80211(priv, "leave - vif != NULL\n"); 1924 err = -EOPNOTSUPP; 1925 goto out; 1926 } 1927 1928 priv->vif = vif; 1929 priv->iw_mode = vif->type; 1930 1931 err = iwl_set_mode(priv, vif); 1932 if (err) 1933 goto out_err; 1934 1935 goto out; 1936 1937 out_err: 1938 priv->vif = NULL; 1939 priv->iw_mode = NL80211_IFTYPE_STATION; 1940 out: 1941 mutex_unlock(&priv->mutex); 1942 1943 IWL_DEBUG_MAC80211(priv, "leave\n"); 1944 return err; 1945} 1946EXPORT_SYMBOL(iwl_mac_add_interface); 1947 1948void iwl_mac_remove_interface(struct ieee80211_hw *hw, 1949 struct ieee80211_vif *vif) 1950{ 1951 struct iwl_priv *priv = hw->priv; 1952 bool scan_completed = false; 1953 1954 IWL_DEBUG_MAC80211(priv, "enter\n"); 1955 1956 mutex_lock(&priv->mutex); 1957 1958 if (iwl_is_ready_rf(priv)) { 1959 iwl_scan_cancel_timeout(priv, 100); 1960 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK; 1961 iwlcore_commit_rxon(priv); 1962 } 1963 if (priv->vif == vif) { 1964 priv->vif = NULL; 1965 if (priv->scan_vif == vif) { 1966 scan_completed = true; 1967 priv->scan_vif = NULL; 1968 priv->scan_request = NULL; 1969 } 1970 memset(priv->bssid, 0, ETH_ALEN); 1971 } 1972 mutex_unlock(&priv->mutex); 1973 1974 if (scan_completed) 1975 ieee80211_scan_completed(priv->hw, true); 1976 1977 IWL_DEBUG_MAC80211(priv, "leave\n"); 1978 1979} 1980EXPORT_SYMBOL(iwl_mac_remove_interface); 1981 1982/** 1983 * iwl_mac_config - mac80211 config callback 1984 */ 1985int iwl_mac_config(struct ieee80211_hw *hw, u32 changed) 1986{ 1987 struct iwl_priv *priv = hw->priv; 1988 const struct iwl_channel_info *ch_info; 1989 struct ieee80211_conf *conf = &hw->conf; 1990 struct iwl_ht_config *ht_conf = &priv->current_ht_config; 1991 unsigned long flags = 0; 1992 int ret = 0; 1993 u16 ch; 1994 int scan_active = 0; 1995 1996 mutex_lock(&priv->mutex); 1997 1998 IWL_DEBUG_MAC80211(priv, "enter to channel %d changed 0x%X\n", 1999 conf->channel->hw_value, changed); 2000 2001 if (unlikely(!priv->cfg->mod_params->disable_hw_scan && 2002 test_bit(STATUS_SCANNING, &priv->status))) { 2003 scan_active = 1; 2004 IWL_DEBUG_MAC80211(priv, "leave - scanning\n"); 2005 } 2006 2007 if (changed & (IEEE80211_CONF_CHANGE_SMPS | 2008 IEEE80211_CONF_CHANGE_CHANNEL)) { 2009 /* mac80211 uses static for non-HT which is what we want */ 2010 priv->current_ht_config.smps = conf->smps_mode; 2011 2012 /* 2013 * Recalculate chain counts. 2014 * 2015 * If monitor mode is enabled then mac80211 will 2016 * set up the SM PS mode to OFF if an HT channel is 2017 * configured. 2018 */ 2019 if (priv->cfg->ops->hcmd->set_rxon_chain) 2020 priv->cfg->ops->hcmd->set_rxon_chain(priv); 2021 } 2022 2023 /* during scanning mac80211 will delay channel setting until 2024 * scan finish with changed = 0 2025 */ 2026 if (!changed || (changed & IEEE80211_CONF_CHANGE_CHANNEL)) { 2027 if (scan_active) 2028 goto set_ch_out; 2029 2030 ch = ieee80211_frequency_to_channel(conf->channel->center_freq); 2031 ch_info = iwl_get_channel_info(priv, conf->channel->band, ch); 2032 if (!is_channel_valid(ch_info)) { 2033 IWL_DEBUG_MAC80211(priv, "leave - invalid channel\n"); 2034 ret = -EINVAL; 2035 goto set_ch_out; 2036 } 2037 2038 spin_lock_irqsave(&priv->lock, flags); 2039 2040 /* Configure HT40 channels */ 2041 ht_conf->is_ht = conf_is_ht(conf); 2042 if (ht_conf->is_ht) { 2043 if (conf_is_ht40_minus(conf)) { 2044 ht_conf->extension_chan_offset = 2045 IEEE80211_HT_PARAM_CHA_SEC_BELOW; 2046 ht_conf->is_40mhz = true; 2047 } else if (conf_is_ht40_plus(conf)) { 2048 ht_conf->extension_chan_offset = 2049 IEEE80211_HT_PARAM_CHA_SEC_ABOVE; 2050 ht_conf->is_40mhz = true; 2051 } else { 2052 ht_conf->extension_chan_offset = 2053 IEEE80211_HT_PARAM_CHA_SEC_NONE; 2054 ht_conf->is_40mhz = false; 2055 } 2056 } else 2057 ht_conf->is_40mhz = false; 2058 /* Default to no protection. Protection mode will later be set 2059 * from BSS config in iwl_ht_conf */ 2060 ht_conf->ht_protection = IEEE80211_HT_OP_MODE_PROTECTION_NONE; 2061 2062 /* if we are switching from ht to 2.4 clear flags 2063 * from any ht related info since 2.4 does not 2064 * support ht */ 2065 if ((le16_to_cpu(priv->staging_rxon.channel) != ch)) 2066 priv->staging_rxon.flags = 0; 2067 2068 iwl_set_rxon_channel(priv, conf->channel); 2069 iwl_set_rxon_ht(priv, ht_conf); 2070 2071 iwl_set_flags_for_band(priv, conf->channel->band, priv->vif); 2072 spin_unlock_irqrestore(&priv->lock, flags); 2073 2074 if (priv->cfg->ops->lib->update_bcast_station) 2075 ret = priv->cfg->ops->lib->update_bcast_station(priv); 2076 2077 set_ch_out: 2078 /* The list of supported rates and rate mask can be different 2079 * for each band; since the band may have changed, reset 2080 * the rate mask to what mac80211 lists */ 2081 iwl_set_rate(priv); 2082 } 2083 2084 if (changed & (IEEE80211_CONF_CHANGE_PS | 2085 IEEE80211_CONF_CHANGE_IDLE)) { 2086 ret = iwl_power_update_mode(priv, false); 2087 if (ret) 2088 IWL_DEBUG_MAC80211(priv, "Error setting sleep level\n"); 2089 } 2090 2091 if (changed & IEEE80211_CONF_CHANGE_POWER) { 2092 IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n", 2093 priv->tx_power_user_lmt, conf->power_level); 2094 2095 iwl_set_tx_power(priv, conf->power_level, false); 2096 } 2097 2098 if (!iwl_is_ready(priv)) { 2099 IWL_DEBUG_MAC80211(priv, "leave - not ready\n"); 2100 goto out; 2101 } 2102 2103 if (scan_active) 2104 goto out; 2105 2106 if (memcmp(&priv->active_rxon, 2107 &priv->staging_rxon, sizeof(priv->staging_rxon))) 2108 iwlcore_commit_rxon(priv); 2109 else 2110 IWL_DEBUG_INFO(priv, "Not re-sending same RXON configuration.\n"); 2111 2112 2113out: 2114 IWL_DEBUG_MAC80211(priv, "leave\n"); 2115 mutex_unlock(&priv->mutex); 2116 return ret; 2117} 2118EXPORT_SYMBOL(iwl_mac_config); 2119 2120void iwl_mac_reset_tsf(struct ieee80211_hw *hw) 2121{ 2122 struct iwl_priv *priv = hw->priv; 2123 unsigned long flags; 2124 2125 mutex_lock(&priv->mutex); 2126 IWL_DEBUG_MAC80211(priv, "enter\n"); 2127 2128 spin_lock_irqsave(&priv->lock, flags); 2129 memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_config)); 2130 spin_unlock_irqrestore(&priv->lock, flags); 2131 2132 spin_lock_irqsave(&priv->lock, flags); 2133 2134 /* new association get rid of ibss beacon skb */ 2135 if (priv->ibss_beacon) 2136 dev_kfree_skb(priv->ibss_beacon); 2137 2138 priv->ibss_beacon = NULL; 2139 2140 priv->timestamp = 0; 2141 2142 spin_unlock_irqrestore(&priv->lock, flags); 2143 2144 if (!iwl_is_ready_rf(priv)) { 2145 IWL_DEBUG_MAC80211(priv, "leave - not ready\n"); 2146 mutex_unlock(&priv->mutex); 2147 return; 2148 } 2149 2150 /* we are restarting association process 2151 * clear RXON_FILTER_ASSOC_MSK bit 2152 */ 2153 iwl_scan_cancel_timeout(priv, 100); 2154 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK; 2155 iwlcore_commit_rxon(priv); 2156 2157 iwl_set_rate(priv); 2158 2159 mutex_unlock(&priv->mutex); 2160 2161 IWL_DEBUG_MAC80211(priv, "leave\n"); 2162} 2163EXPORT_SYMBOL(iwl_mac_reset_tsf); 2164 2165int iwl_alloc_txq_mem(struct iwl_priv *priv) 2166{ 2167 if (!priv->txq) 2168 priv->txq = kzalloc( 2169 sizeof(struct iwl_tx_queue) * priv->cfg->num_of_queues, 2170 GFP_KERNEL); 2171 if (!priv->txq) { 2172 IWL_ERR(priv, "Not enough memory for txq\n"); 2173 return -ENOMEM; 2174 } 2175 return 0; 2176} 2177EXPORT_SYMBOL(iwl_alloc_txq_mem); 2178 2179void iwl_free_txq_mem(struct iwl_priv *priv) 2180{ 2181 kfree(priv->txq); 2182 priv->txq = NULL; 2183} 2184EXPORT_SYMBOL(iwl_free_txq_mem); 2185 2186#ifdef CONFIG_IWLWIFI_DEBUGFS 2187 2188#define IWL_TRAFFIC_DUMP_SIZE (IWL_TRAFFIC_ENTRY_SIZE * IWL_TRAFFIC_ENTRIES) 2189 2190void iwl_reset_traffic_log(struct iwl_priv *priv) 2191{ 2192 priv->tx_traffic_idx = 0; 2193 priv->rx_traffic_idx = 0; 2194 if (priv->tx_traffic) 2195 memset(priv->tx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE); 2196 if (priv->rx_traffic) 2197 memset(priv->rx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE); 2198} 2199 2200int iwl_alloc_traffic_mem(struct iwl_priv *priv) 2201{ 2202 u32 traffic_size = IWL_TRAFFIC_DUMP_SIZE; 2203 2204 if (iwl_debug_level & IWL_DL_TX) { 2205 if (!priv->tx_traffic) { 2206 priv->tx_traffic = 2207 kzalloc(traffic_size, GFP_KERNEL); 2208 if (!priv->tx_traffic) 2209 return -ENOMEM; 2210 } 2211 } 2212 if (iwl_debug_level & IWL_DL_RX) { 2213 if (!priv->rx_traffic) { 2214 priv->rx_traffic = 2215 kzalloc(traffic_size, GFP_KERNEL); 2216 if (!priv->rx_traffic) 2217 return -ENOMEM; 2218 } 2219 } 2220 iwl_reset_traffic_log(priv); 2221 return 0; 2222} 2223EXPORT_SYMBOL(iwl_alloc_traffic_mem); 2224 2225void iwl_free_traffic_mem(struct iwl_priv *priv) 2226{ 2227 kfree(priv->tx_traffic); 2228 priv->tx_traffic = NULL; 2229 2230 kfree(priv->rx_traffic); 2231 priv->rx_traffic = NULL; 2232} 2233EXPORT_SYMBOL(iwl_free_traffic_mem); 2234 2235void iwl_dbg_log_tx_data_frame(struct iwl_priv *priv, 2236 u16 length, struct ieee80211_hdr *header) 2237{ 2238 __le16 fc; 2239 u16 len; 2240 2241 if (likely(!(iwl_debug_level & IWL_DL_TX))) 2242 return; 2243 2244 if (!priv->tx_traffic) 2245 return; 2246 2247 fc = header->frame_control; 2248 if (ieee80211_is_data(fc)) { 2249 len = (length > IWL_TRAFFIC_ENTRY_SIZE) 2250 ? IWL_TRAFFIC_ENTRY_SIZE : length; 2251 memcpy((priv->tx_traffic + 2252 (priv->tx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)), 2253 header, len); 2254 priv->tx_traffic_idx = 2255 (priv->tx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES; 2256 } 2257} 2258EXPORT_SYMBOL(iwl_dbg_log_tx_data_frame); 2259 2260void iwl_dbg_log_rx_data_frame(struct iwl_priv *priv, 2261 u16 length, struct ieee80211_hdr *header) 2262{ 2263 __le16 fc; 2264 u16 len; 2265 2266 if (likely(!(iwl_debug_level & IWL_DL_RX))) 2267 return; 2268 2269 if (!priv->rx_traffic) 2270 return; 2271 2272 fc = header->frame_control; 2273 if (ieee80211_is_data(fc)) { 2274 len = (length > IWL_TRAFFIC_ENTRY_SIZE) 2275 ? IWL_TRAFFIC_ENTRY_SIZE : length; 2276 memcpy((priv->rx_traffic + 2277 (priv->rx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)), 2278 header, len); 2279 priv->rx_traffic_idx = 2280 (priv->rx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES; 2281 } 2282} 2283EXPORT_SYMBOL(iwl_dbg_log_rx_data_frame); 2284 2285const char *get_mgmt_string(int cmd) 2286{ 2287 switch (cmd) { 2288 IWL_CMD(MANAGEMENT_ASSOC_REQ); 2289 IWL_CMD(MANAGEMENT_ASSOC_RESP); 2290 IWL_CMD(MANAGEMENT_REASSOC_REQ); 2291 IWL_CMD(MANAGEMENT_REASSOC_RESP); 2292 IWL_CMD(MANAGEMENT_PROBE_REQ); 2293 IWL_CMD(MANAGEMENT_PROBE_RESP); 2294 IWL_CMD(MANAGEMENT_BEACON); 2295 IWL_CMD(MANAGEMENT_ATIM); 2296 IWL_CMD(MANAGEMENT_DISASSOC); 2297 IWL_CMD(MANAGEMENT_AUTH); 2298 IWL_CMD(MANAGEMENT_DEAUTH); 2299 IWL_CMD(MANAGEMENT_ACTION); 2300 default: 2301 return "UNKNOWN"; 2302 2303 } 2304} 2305 2306const char *get_ctrl_string(int cmd) 2307{ 2308 switch (cmd) { 2309 IWL_CMD(CONTROL_BACK_REQ); 2310 IWL_CMD(CONTROL_BACK); 2311 IWL_CMD(CONTROL_PSPOLL); 2312 IWL_CMD(CONTROL_RTS); 2313 IWL_CMD(CONTROL_CTS); 2314 IWL_CMD(CONTROL_ACK); 2315 IWL_CMD(CONTROL_CFEND); 2316 IWL_CMD(CONTROL_CFENDACK); 2317 default: 2318 return "UNKNOWN"; 2319 2320 } 2321} 2322 2323void iwl_clear_traffic_stats(struct iwl_priv *priv) 2324{ 2325 memset(&priv->tx_stats, 0, sizeof(struct traffic_stats)); 2326 memset(&priv->rx_stats, 0, sizeof(struct traffic_stats)); 2327 priv->led_tpt = 0; 2328} 2329 2330/* 2331 * if CONFIG_IWLWIFI_DEBUGFS defined, iwl_update_stats function will 2332 * record all the MGMT, CTRL and DATA pkt for both TX and Rx pass. 2333 * Use debugFs to display the rx/rx_statistics 2334 * if CONFIG_IWLWIFI_DEBUGFS not being defined, then no MGMT and CTRL 2335 * information will be recorded, but DATA pkt still will be recorded 2336 * for the reason of iwl_led.c need to control the led blinking based on 2337 * number of tx and rx data. 2338 * 2339 */ 2340void iwl_update_stats(struct iwl_priv *priv, bool is_tx, __le16 fc, u16 len) 2341{ 2342 struct traffic_stats *stats; 2343 2344 if (is_tx) 2345 stats = &priv->tx_stats; 2346 else 2347 stats = &priv->rx_stats; 2348 2349 if (ieee80211_is_mgmt(fc)) { 2350 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) { 2351 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ): 2352 stats->mgmt[MANAGEMENT_ASSOC_REQ]++; 2353 break; 2354 case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP): 2355 stats->mgmt[MANAGEMENT_ASSOC_RESP]++; 2356 break; 2357 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ): 2358 stats->mgmt[MANAGEMENT_REASSOC_REQ]++; 2359 break; 2360 case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP): 2361 stats->mgmt[MANAGEMENT_REASSOC_RESP]++; 2362 break; 2363 case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ): 2364 stats->mgmt[MANAGEMENT_PROBE_REQ]++; 2365 break; 2366 case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP): 2367 stats->mgmt[MANAGEMENT_PROBE_RESP]++; 2368 break; 2369 case cpu_to_le16(IEEE80211_STYPE_BEACON): 2370 stats->mgmt[MANAGEMENT_BEACON]++; 2371 break; 2372 case cpu_to_le16(IEEE80211_STYPE_ATIM): 2373 stats->mgmt[MANAGEMENT_ATIM]++; 2374 break; 2375 case cpu_to_le16(IEEE80211_STYPE_DISASSOC): 2376 stats->mgmt[MANAGEMENT_DISASSOC]++; 2377 break; 2378 case cpu_to_le16(IEEE80211_STYPE_AUTH): 2379 stats->mgmt[MANAGEMENT_AUTH]++; 2380 break; 2381 case cpu_to_le16(IEEE80211_STYPE_DEAUTH): 2382 stats->mgmt[MANAGEMENT_DEAUTH]++; 2383 break; 2384 case cpu_to_le16(IEEE80211_STYPE_ACTION): 2385 stats->mgmt[MANAGEMENT_ACTION]++; 2386 break; 2387 } 2388 } else if (ieee80211_is_ctl(fc)) { 2389 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) { 2390 case cpu_to_le16(IEEE80211_STYPE_BACK_REQ): 2391 stats->ctrl[CONTROL_BACK_REQ]++; 2392 break; 2393 case cpu_to_le16(IEEE80211_STYPE_BACK): 2394 stats->ctrl[CONTROL_BACK]++; 2395 break; 2396 case cpu_to_le16(IEEE80211_STYPE_PSPOLL): 2397 stats->ctrl[CONTROL_PSPOLL]++; 2398 break; 2399 case cpu_to_le16(IEEE80211_STYPE_RTS): 2400 stats->ctrl[CONTROL_RTS]++; 2401 break; 2402 case cpu_to_le16(IEEE80211_STYPE_CTS): 2403 stats->ctrl[CONTROL_CTS]++; 2404 break; 2405 case cpu_to_le16(IEEE80211_STYPE_ACK): 2406 stats->ctrl[CONTROL_ACK]++; 2407 break; 2408 case cpu_to_le16(IEEE80211_STYPE_CFEND): 2409 stats->ctrl[CONTROL_CFEND]++; 2410 break; 2411 case cpu_to_le16(IEEE80211_STYPE_CFENDACK): 2412 stats->ctrl[CONTROL_CFENDACK]++; 2413 break; 2414 } 2415 } else { 2416 /* data */ 2417 stats->data_cnt++; 2418 stats->data_bytes += len; 2419 } 2420 iwl_leds_background(priv); 2421} 2422EXPORT_SYMBOL(iwl_update_stats); 2423#endif 2424 2425static const char *get_csr_string(int cmd) 2426{ 2427 switch (cmd) { 2428 IWL_CMD(CSR_HW_IF_CONFIG_REG); 2429 IWL_CMD(CSR_INT_COALESCING); 2430 IWL_CMD(CSR_INT); 2431 IWL_CMD(CSR_INT_MASK); 2432 IWL_CMD(CSR_FH_INT_STATUS); 2433 IWL_CMD(CSR_GPIO_IN); 2434 IWL_CMD(CSR_RESET); 2435 IWL_CMD(CSR_GP_CNTRL); 2436 IWL_CMD(CSR_HW_REV); 2437 IWL_CMD(CSR_EEPROM_REG); 2438 IWL_CMD(CSR_EEPROM_GP); 2439 IWL_CMD(CSR_OTP_GP_REG); 2440 IWL_CMD(CSR_GIO_REG); 2441 IWL_CMD(CSR_GP_UCODE_REG); 2442 IWL_CMD(CSR_GP_DRIVER_REG); 2443 IWL_CMD(CSR_UCODE_DRV_GP1); 2444 IWL_CMD(CSR_UCODE_DRV_GP2); 2445 IWL_CMD(CSR_LED_REG); 2446 IWL_CMD(CSR_DRAM_INT_TBL_REG); 2447 IWL_CMD(CSR_GIO_CHICKEN_BITS); 2448 IWL_CMD(CSR_ANA_PLL_CFG); 2449 IWL_CMD(CSR_HW_REV_WA_REG); 2450 IWL_CMD(CSR_DBG_HPET_MEM_REG); 2451 default: 2452 return "UNKNOWN"; 2453 2454 } 2455} 2456 2457void iwl_dump_csr(struct iwl_priv *priv) 2458{ 2459 int i; 2460 u32 csr_tbl[] = { 2461 CSR_HW_IF_CONFIG_REG, 2462 CSR_INT_COALESCING, 2463 CSR_INT, 2464 CSR_INT_MASK, 2465 CSR_FH_INT_STATUS, 2466 CSR_GPIO_IN, 2467 CSR_RESET, 2468 CSR_GP_CNTRL, 2469 CSR_HW_REV, 2470 CSR_EEPROM_REG, 2471 CSR_EEPROM_GP, 2472 CSR_OTP_GP_REG, 2473 CSR_GIO_REG, 2474 CSR_GP_UCODE_REG, 2475 CSR_GP_DRIVER_REG, 2476 CSR_UCODE_DRV_GP1, 2477 CSR_UCODE_DRV_GP2, 2478 CSR_LED_REG, 2479 CSR_DRAM_INT_TBL_REG, 2480 CSR_GIO_CHICKEN_BITS, 2481 CSR_ANA_PLL_CFG, 2482 CSR_HW_REV_WA_REG, 2483 CSR_DBG_HPET_MEM_REG 2484 }; 2485 IWL_ERR(priv, "CSR values:\n"); 2486 IWL_ERR(priv, "(2nd byte of CSR_INT_COALESCING is " 2487 "CSR_INT_PERIODIC_REG)\n"); 2488 for (i = 0; i < ARRAY_SIZE(csr_tbl); i++) { 2489 IWL_ERR(priv, " %25s: 0X%08x\n", 2490 get_csr_string(csr_tbl[i]), 2491 iwl_read32(priv, csr_tbl[i])); 2492 } 2493} 2494EXPORT_SYMBOL(iwl_dump_csr); 2495 2496static const char *get_fh_string(int cmd) 2497{ 2498 switch (cmd) { 2499 IWL_CMD(FH_RSCSR_CHNL0_STTS_WPTR_REG); 2500 IWL_CMD(FH_RSCSR_CHNL0_RBDCB_BASE_REG); 2501 IWL_CMD(FH_RSCSR_CHNL0_WPTR); 2502 IWL_CMD(FH_MEM_RCSR_CHNL0_CONFIG_REG); 2503 IWL_CMD(FH_MEM_RSSR_SHARED_CTRL_REG); 2504 IWL_CMD(FH_MEM_RSSR_RX_STATUS_REG); 2505 IWL_CMD(FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV); 2506 IWL_CMD(FH_TSSR_TX_STATUS_REG); 2507 IWL_CMD(FH_TSSR_TX_ERROR_REG); 2508 default: 2509 return "UNKNOWN"; 2510 2511 } 2512} 2513 2514int iwl_dump_fh(struct iwl_priv *priv, char **buf, bool display) 2515{ 2516 int i; 2517#ifdef CONFIG_IWLWIFI_DEBUG 2518 int pos = 0; 2519 size_t bufsz = 0; 2520#endif 2521 u32 fh_tbl[] = { 2522 FH_RSCSR_CHNL0_STTS_WPTR_REG, 2523 FH_RSCSR_CHNL0_RBDCB_BASE_REG, 2524 FH_RSCSR_CHNL0_WPTR, 2525 FH_MEM_RCSR_CHNL0_CONFIG_REG, 2526 FH_MEM_RSSR_SHARED_CTRL_REG, 2527 FH_MEM_RSSR_RX_STATUS_REG, 2528 FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV, 2529 FH_TSSR_TX_STATUS_REG, 2530 FH_TSSR_TX_ERROR_REG 2531 }; 2532#ifdef CONFIG_IWLWIFI_DEBUG 2533 if (display) { 2534 bufsz = ARRAY_SIZE(fh_tbl) * 48 + 40; 2535 *buf = kmalloc(bufsz, GFP_KERNEL); 2536 if (!*buf) 2537 return -ENOMEM; 2538 pos += scnprintf(*buf + pos, bufsz - pos, 2539 "FH register values:\n"); 2540 for (i = 0; i < ARRAY_SIZE(fh_tbl); i++) { 2541 pos += scnprintf(*buf + pos, bufsz - pos, 2542 " %34s: 0X%08x\n", 2543 get_fh_string(fh_tbl[i]), 2544 iwl_read_direct32(priv, fh_tbl[i])); 2545 } 2546 return pos; 2547 } 2548#endif 2549 IWL_ERR(priv, "FH register values:\n"); 2550 for (i = 0; i < ARRAY_SIZE(fh_tbl); i++) { 2551 IWL_ERR(priv, " %34s: 0X%08x\n", 2552 get_fh_string(fh_tbl[i]), 2553 iwl_read_direct32(priv, fh_tbl[i])); 2554 } 2555 return 0; 2556} 2557EXPORT_SYMBOL(iwl_dump_fh); 2558 2559static void iwl_force_rf_reset(struct iwl_priv *priv) 2560{ 2561 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) 2562 return; 2563 2564 if (!iwl_is_associated(priv)) { 2565 IWL_DEBUG_SCAN(priv, "force reset rejected: not associated\n"); 2566 return; 2567 } 2568 /* 2569 * There is no easy and better way to force reset the radio, 2570 * the only known method is switching channel which will force to 2571 * reset and tune the radio. 2572 * Use internal short scan (single channel) operation to should 2573 * achieve this objective. 2574 * Driver should reset the radio when number of consecutive missed 2575 * beacon, or any other uCode error condition detected. 2576 */ 2577 IWL_DEBUG_INFO(priv, "perform radio reset.\n"); 2578 iwl_internal_short_hw_scan(priv); 2579} 2580 2581 2582int iwl_force_reset(struct iwl_priv *priv, int mode, bool external) 2583{ 2584 struct iwl_force_reset *force_reset; 2585 2586 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) 2587 return -EINVAL; 2588 2589 if (test_bit(STATUS_SCANNING, &priv->status)) { 2590 IWL_DEBUG_INFO(priv, "scan in progress.\n"); 2591 return -EINVAL; 2592 } 2593 2594 if (mode >= IWL_MAX_FORCE_RESET) { 2595 IWL_DEBUG_INFO(priv, "invalid reset request.\n"); 2596 return -EINVAL; 2597 } 2598 force_reset = &priv->force_reset[mode]; 2599 force_reset->reset_request_count++; 2600 if (!external) { 2601 if (force_reset->last_force_reset_jiffies && 2602 time_after(force_reset->last_force_reset_jiffies + 2603 force_reset->reset_duration, jiffies)) { 2604 IWL_DEBUG_INFO(priv, "force reset rejected\n"); 2605 force_reset->reset_reject_count++; 2606 return -EAGAIN; 2607 } 2608 } 2609 force_reset->reset_success_count++; 2610 force_reset->last_force_reset_jiffies = jiffies; 2611 IWL_DEBUG_INFO(priv, "perform force reset (%d)\n", mode); 2612 switch (mode) { 2613 case IWL_RF_RESET: 2614 iwl_force_rf_reset(priv); 2615 break; 2616 case IWL_FW_RESET: 2617 /* 2618 * if the request is from external(ex: debugfs), 2619 * then always perform the request in regardless the module 2620 * parameter setting 2621 * if the request is from internal (uCode error or driver 2622 * detect failure), then fw_restart module parameter 2623 * need to be check before performing firmware reload 2624 */ 2625 if (!external && !priv->cfg->mod_params->restart_fw) { 2626 IWL_DEBUG_INFO(priv, "Cancel firmware reload based on " 2627 "module parameter setting\n"); 2628 break; 2629 } 2630 IWL_ERR(priv, "On demand firmware reload\n"); 2631 /* Set the FW error flag -- cleared on iwl_down */ 2632 set_bit(STATUS_FW_ERROR, &priv->status); 2633 wake_up_interruptible(&priv->wait_command_queue); 2634 /* 2635 * Keep the restart process from trying to send host 2636 * commands by clearing the INIT status bit 2637 */ 2638 clear_bit(STATUS_READY, &priv->status); 2639 queue_work(priv->workqueue, &priv->restart); 2640 break; 2641 } 2642 return 0; 2643} 2644EXPORT_SYMBOL(iwl_force_reset); 2645 2646/** 2647 * iwl_bg_monitor_recover - Timer callback to check for stuck queue and recover 2648 * 2649 * During normal condition (no queue is stuck), the timer is continually set to 2650 * execute every monitor_recover_period milliseconds after the last timer 2651 * expired. When the queue read_ptr is at the same place, the timer is 2652 * shorten to 100mSecs. This is 2653 * 1) to reduce the chance that the read_ptr may wrap around (not stuck) 2654 * 2) to detect the stuck queues quicker before the station and AP can 2655 * disassociate each other. 2656 * 2657 * This function monitors all the tx queues and recover from it if any 2658 * of the queues are stuck. 2659 * 1. It first check the cmd queue for stuck conditions. If it is stuck, 2660 * it will recover by resetting the firmware and return. 2661 * 2. Then, it checks for station association. If it associates it will check 2662 * other queues. If any queue is stuck, it will recover by resetting 2663 * the firmware. 2664 * Note: It the number of times the queue read_ptr to be at the same place to 2665 * be MAX_REPEAT+1 in order to consider to be stuck. 2666 */ 2667/* 2668 * The maximum number of times the read pointer of the tx queue at the 2669 * same place without considering to be stuck. 2670 */ 2671#define MAX_REPEAT (2) 2672static int iwl_check_stuck_queue(struct iwl_priv *priv, int cnt) 2673{ 2674 struct iwl_tx_queue *txq; 2675 struct iwl_queue *q; 2676 2677 txq = &priv->txq[cnt]; 2678 q = &txq->q; 2679 /* queue is empty, skip */ 2680 if (q->read_ptr != q->write_ptr) { 2681 if (q->read_ptr == q->last_read_ptr) { 2682 /* a queue has not been read from last time */ 2683 if (q->repeat_same_read_ptr > MAX_REPEAT) { 2684 IWL_ERR(priv, 2685 "queue %d stuck %d time. Fw reload.\n", 2686 q->id, q->repeat_same_read_ptr); 2687 q->repeat_same_read_ptr = 0; 2688 iwl_force_reset(priv, IWL_FW_RESET, false); 2689 } else { 2690 q->repeat_same_read_ptr++; 2691 IWL_DEBUG_RADIO(priv, 2692 "queue %d, not read %d time\n", 2693 q->id, 2694 q->repeat_same_read_ptr); 2695 mod_timer(&priv->monitor_recover, jiffies + 2696 msecs_to_jiffies(IWL_ONE_HUNDRED_MSECS)); 2697 } 2698 return 1; 2699 } else { 2700 q->last_read_ptr = q->read_ptr; 2701 q->repeat_same_read_ptr = 0; 2702 } 2703 } 2704 return 0; 2705} 2706 2707void iwl_bg_monitor_recover(unsigned long data) 2708{ 2709 struct iwl_priv *priv = (struct iwl_priv *)data; 2710 int cnt; 2711 2712 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) 2713 return; 2714 2715 /* monitor and check for stuck cmd queue */ 2716 if (iwl_check_stuck_queue(priv, IWL_CMD_QUEUE_NUM)) 2717 return; 2718 2719 /* monitor and check for other stuck queues */ 2720 if (iwl_is_associated(priv)) { 2721 for (cnt = 0; cnt < priv->hw_params.max_txq_num; cnt++) { 2722 /* skip as we already checked the command queue */ 2723 if (cnt == IWL_CMD_QUEUE_NUM) 2724 continue; 2725 if (iwl_check_stuck_queue(priv, cnt)) 2726 return; 2727 } 2728 } 2729 /* 2730 * Reschedule the timer to occur in 2731 * priv->cfg->monitor_recover_period 2732 */ 2733 mod_timer(&priv->monitor_recover, 2734 jiffies + msecs_to_jiffies(priv->cfg->monitor_recover_period)); 2735} 2736EXPORT_SYMBOL(iwl_bg_monitor_recover); 2737 2738 2739/* 2740 * extended beacon time format 2741 * time in usec will be changed into a 32-bit value in extended:internal format 2742 * the extended part is the beacon counts 2743 * the internal part is the time in usec within one beacon interval 2744 */ 2745u32 iwl_usecs_to_beacons(struct iwl_priv *priv, u32 usec, u32 beacon_interval) 2746{ 2747 u32 quot; 2748 u32 rem; 2749 u32 interval = beacon_interval * TIME_UNIT; 2750 2751 if (!interval || !usec) 2752 return 0; 2753 2754 quot = (usec / interval) & 2755 (iwl_beacon_time_mask_high(priv, 2756 priv->hw_params.beacon_time_tsf_bits) >> 2757 priv->hw_params.beacon_time_tsf_bits); 2758 rem = (usec % interval) & iwl_beacon_time_mask_low(priv, 2759 priv->hw_params.beacon_time_tsf_bits); 2760 2761 return (quot << priv->hw_params.beacon_time_tsf_bits) + rem; 2762} 2763EXPORT_SYMBOL(iwl_usecs_to_beacons); 2764 2765/* base is usually what we get from ucode with each received frame, 2766 * the same as HW timer counter counting down 2767 */ 2768__le32 iwl_add_beacon_time(struct iwl_priv *priv, u32 base, 2769 u32 addon, u32 beacon_interval) 2770{ 2771 u32 base_low = base & iwl_beacon_time_mask_low(priv, 2772 priv->hw_params.beacon_time_tsf_bits); 2773 u32 addon_low = addon & iwl_beacon_time_mask_low(priv, 2774 priv->hw_params.beacon_time_tsf_bits); 2775 u32 interval = beacon_interval * TIME_UNIT; 2776 u32 res = (base & iwl_beacon_time_mask_high(priv, 2777 priv->hw_params.beacon_time_tsf_bits)) + 2778 (addon & iwl_beacon_time_mask_high(priv, 2779 priv->hw_params.beacon_time_tsf_bits)); 2780 2781 if (base_low > addon_low) 2782 res += base_low - addon_low; 2783 else if (base_low < addon_low) { 2784 res += interval + base_low - addon_low; 2785 res += (1 << priv->hw_params.beacon_time_tsf_bits); 2786 } else 2787 res += (1 << priv->hw_params.beacon_time_tsf_bits); 2788 2789 return cpu_to_le32(res); 2790} 2791EXPORT_SYMBOL(iwl_add_beacon_time); 2792 2793#ifdef CONFIG_PM 2794 2795int iwl_pci_suspend(struct pci_dev *pdev, pm_message_t state) 2796{ 2797 struct iwl_priv *priv = pci_get_drvdata(pdev); 2798 2799 /* 2800 * This function is called when system goes into suspend state 2801 * mac80211 will call iwl_mac_stop() from the mac80211 suspend function 2802 * first but since iwl_mac_stop() has no knowledge of who the caller is, 2803 * it will not call apm_ops.stop() to stop the DMA operation. 2804 * Calling apm_ops.stop here to make sure we stop the DMA. 2805 */ 2806 priv->cfg->ops->lib->apm_ops.stop(priv); 2807 2808 pci_save_state(pdev); 2809 pci_disable_device(pdev); 2810 pci_set_power_state(pdev, PCI_D3hot); 2811 2812 return 0; 2813} 2814EXPORT_SYMBOL(iwl_pci_suspend); 2815 2816int iwl_pci_resume(struct pci_dev *pdev) 2817{ 2818 struct iwl_priv *priv = pci_get_drvdata(pdev); 2819 int ret; 2820 bool hw_rfkill = false; 2821 2822 /* 2823 * We disable the RETRY_TIMEOUT register (0x41) to keep 2824 * PCI Tx retries from interfering with C3 CPU state. 2825 */ 2826 pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00); 2827 2828 pci_set_power_state(pdev, PCI_D0); 2829 ret = pci_enable_device(pdev); 2830 if (ret) 2831 return ret; 2832 pci_restore_state(pdev); 2833 iwl_enable_interrupts(priv); 2834 2835 if (!(iwl_read32(priv, CSR_GP_CNTRL) & 2836 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)) 2837 hw_rfkill = true; 2838 2839 if (hw_rfkill) 2840 set_bit(STATUS_RF_KILL_HW, &priv->status); 2841 else 2842 clear_bit(STATUS_RF_KILL_HW, &priv->status); 2843 2844 wiphy_rfkill_set_hw_state(priv->hw->wiphy, hw_rfkill); 2845 2846 return 0; 2847} 2848EXPORT_SYMBOL(iwl_pci_resume); 2849 2850#endif /* CONFIG_PM */ 2851