1 /* $OpenBSD: if_iwm.c,v 1.39 2015/03/23 00:35:19 jsg Exp $ */ 2 3 /* 4 * Copyright (c) 2014 genua mbh <info@genua.de> 5 * Copyright (c) 2014 Fixup Software Ltd. 6 * 7 * Permission to use, copy, modify, and distribute this software for any 8 * purpose with or without fee is hereby granted, provided that the above 9 * copyright notice and this permission notice appear in all copies. 10 * 11 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 17 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 18 */ 19 20 /*- 21 * Based on BSD-licensed source modules in the Linux iwlwifi driver, 22 * which were used as the reference documentation for this implementation. 23 * 24 * Driver version we are currently based off of is 25 * Linux 3.14.3 (tag id a2df521e42b1d9a23f620ac79dbfe8655a8391dd) 26 * 27 *********************************************************************** 28 * 29 * This file is provided under a dual BSD/GPLv2 license. When using or 30 * redistributing this file, you may do so under either license. 31 * 32 * GPL LICENSE SUMMARY 33 * 34 * Copyright(c) 2007 - 2013 Intel Corporation. All rights reserved. 35 * 36 * This program is free software; you can redistribute it and/or modify 37 * it under the terms of version 2 of the GNU General Public License as 38 * published by the Free Software Foundation. 39 * 40 * This program is distributed in the hope that it will be useful, but 41 * WITHOUT ANY WARRANTY; without even the implied warranty of 42 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 43 * General Public License for more details. 44 * 45 * You should have received a copy of the GNU General Public License 46 * along with this program; if not, write to the Free Software 47 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, 48 * USA 49 * 50 * The full GNU General Public License is included in this distribution 51 * in the file called COPYING. 52 * 53 * Contact Information: 54 * Intel Linux Wireless <ilw@linux.intel.com> 55 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 56 * 57 * 58 * BSD LICENSE 59 * 60 * Copyright(c) 2005 - 2013 Intel Corporation. All rights reserved. 61 * All rights reserved. 62 * 63 * Redistribution and use in source and binary forms, with or without 64 * modification, are permitted provided that the following conditions 65 * are met: 66 * 67 * * Redistributions of source code must retain the above copyright 68 * notice, this list of conditions and the following disclaimer. 69 * * Redistributions in binary form must reproduce the above copyright 70 * notice, this list of conditions and the following disclaimer in 71 * the documentation and/or other materials provided with the 72 * distribution. 73 * * Neither the name Intel Corporation nor the names of its 74 * contributors may be used to endorse or promote products derived 75 * from this software without specific prior written permission. 76 * 77 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 78 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 79 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 80 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 81 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 82 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 83 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 84 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 85 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 86 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 87 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 88 */ 89 90 /*- 91 * Copyright (c) 2007-2010 Damien Bergamini <damien.bergamini@free.fr> 92 * 93 * Permission to use, copy, modify, and distribute this software for any 94 * purpose with or without fee is hereby granted, provided that the above 95 * copyright notice and this permission notice appear in all copies. 96 * 97 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 98 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 99 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 100 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 101 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 102 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 103 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 104 */ 105 #include <sys/cdefs.h> 106 __FBSDID("$FreeBSD$"); 107 108 #include <sys/param.h> 109 #include <sys/bus.h> 110 #include <sys/endian.h> 111 #include <sys/firmware.h> 112 #include <sys/kernel.h> 113 #include <sys/malloc.h> 114 #include <sys/mbuf.h> 115 #include <sys/rman.h> 116 #include <sys/sysctl.h> 117 #include <sys/linker.h> 118 119 #include <machine/endian.h> 120 121 #include <bus/pci/pcivar.h> 122 #include <bus/pci/pcireg.h> 123 124 #include <net/bpf.h> 125 126 #include <net/if.h> 127 #include <net/if_var.h> 128 #include <net/if_arp.h> 129 #include <net/if_dl.h> 130 #include <net/if_media.h> 131 #include <net/if_types.h> 132 133 #include <netinet/in.h> 134 #include <netinet/in_systm.h> 135 #include <netinet/if_ether.h> 136 #include <netinet/ip.h> 137 138 #include <netproto/802_11/ieee80211_var.h> 139 #include <netproto/802_11/ieee80211_regdomain.h> 140 #include <netproto/802_11/ieee80211_ratectl.h> 141 #include <netproto/802_11/ieee80211_radiotap.h> 142 143 #include "if_iwmreg.h" 144 #include "if_iwmvar.h" 145 #include "if_iwm_debug.h" 146 #include "if_iwm_notif_wait.h" 147 #include "if_iwm_util.h" 148 #include "if_iwm_scan.h" 149 150 #define IWM_DENSE_EBS_SCAN_RATIO 5 151 #define IWM_SPARSE_EBS_SCAN_RATIO 1 152 153 static uint16_t 154 iwm_mvm_scan_rx_chain(struct iwm_softc *sc) 155 { 156 uint16_t rx_chain; 157 uint8_t rx_ant; 158 159 rx_ant = iwm_mvm_get_valid_rx_ant(sc); 160 rx_chain = rx_ant << IWM_PHY_RX_CHAIN_VALID_POS; 161 rx_chain |= rx_ant << IWM_PHY_RX_CHAIN_FORCE_MIMO_SEL_POS; 162 rx_chain |= rx_ant << IWM_PHY_RX_CHAIN_FORCE_SEL_POS; 163 rx_chain |= 0x1 << IWM_PHY_RX_CHAIN_DRIVER_FORCE_POS; 164 return htole16(rx_chain); 165 } 166 167 static uint32_t 168 iwm_mvm_scan_rxon_flags(struct ieee80211_channel *c) 169 { 170 if (IEEE80211_IS_CHAN_2GHZ(c)) 171 return htole32(IWM_PHY_BAND_24); 172 else 173 return htole32(IWM_PHY_BAND_5); 174 } 175 176 static uint32_t 177 iwm_mvm_scan_rate_n_flags(struct iwm_softc *sc, int flags, int no_cck) 178 { 179 uint32_t tx_ant; 180 int i, ind; 181 182 for (i = 0, ind = sc->sc_scan_last_antenna; 183 i < IWM_RATE_MCS_ANT_NUM; i++) { 184 ind = (ind + 1) % IWM_RATE_MCS_ANT_NUM; 185 if (iwm_mvm_get_valid_tx_ant(sc) & (1 << ind)) { 186 sc->sc_scan_last_antenna = ind; 187 break; 188 } 189 } 190 tx_ant = (1 << sc->sc_scan_last_antenna) << IWM_RATE_MCS_ANT_POS; 191 192 if ((flags & IEEE80211_CHAN_2GHZ) && !no_cck) 193 return htole32(IWM_RATE_1M_PLCP | IWM_RATE_MCS_CCK_MSK | 194 tx_ant); 195 else 196 return htole32(IWM_RATE_6M_PLCP | tx_ant); 197 } 198 199 static inline boolean_t 200 iwm_mvm_rrm_scan_needed(struct iwm_softc *sc) 201 { 202 /* require rrm scan whenever the fw supports it */ 203 return fw_has_capa(&sc->sc_fw.ucode_capa, 204 IWM_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT); 205 } 206 207 #ifdef IWM_DEBUG 208 static const char * 209 iwm_mvm_ebs_status_str(enum iwm_scan_ebs_status status) 210 { 211 switch (status) { 212 case IWM_SCAN_EBS_SUCCESS: 213 return "successful"; 214 case IWM_SCAN_EBS_INACTIVE: 215 return "inactive"; 216 case IWM_SCAN_EBS_FAILED: 217 case IWM_SCAN_EBS_CHAN_NOT_FOUND: 218 default: 219 return "failed"; 220 } 221 } 222 #endif 223 224 void 225 iwm_mvm_rx_lmac_scan_complete_notif(struct iwm_softc *sc, 226 struct iwm_rx_packet *pkt) 227 { 228 struct iwm_periodic_scan_complete *scan_notif = (void *)pkt->data; 229 #ifdef IWM_DEBUG 230 boolean_t aborted = (scan_notif->status == IWM_SCAN_OFFLOAD_ABORTED); 231 #endif 232 233 /* If this happens, the firmware has mistakenly sent an LMAC 234 * notification during UMAC scans -- warn and ignore it. 235 */ 236 if (fw_has_capa(&sc->sc_fw.ucode_capa, IWM_UCODE_TLV_CAPA_UMAC_SCAN)) { 237 device_printf(sc->sc_dev, 238 "%s: Mistakenly got LMAC notification during UMAC scan\n", 239 __func__); 240 return; 241 } 242 243 IWM_DPRINTF(sc, IWM_DEBUG_SCAN, "Regular scan %s, EBS status %s (FW)\n", 244 aborted ? "aborted" : "completed", 245 iwm_mvm_ebs_status_str(scan_notif->ebs_status)); 246 247 sc->last_ebs_successful = 248 scan_notif->ebs_status == IWM_SCAN_EBS_SUCCESS || 249 scan_notif->ebs_status == IWM_SCAN_EBS_INACTIVE; 250 251 } 252 253 void 254 iwm_mvm_rx_umac_scan_complete_notif(struct iwm_softc *sc, 255 struct iwm_rx_packet *pkt) 256 { 257 struct iwm_umac_scan_complete *notif = (void *)pkt->data; 258 #ifdef IWM_DEBUG 259 uint32_t uid = le32toh(notif->uid); 260 boolean_t aborted = (notif->status == IWM_SCAN_OFFLOAD_ABORTED); 261 #endif 262 263 IWM_DPRINTF(sc, IWM_DEBUG_SCAN, 264 "Scan completed, uid %u, status %s, EBS status %s\n", 265 uid, 266 aborted ? "aborted" : "completed", 267 iwm_mvm_ebs_status_str(notif->ebs_status)); 268 269 if (notif->ebs_status != IWM_SCAN_EBS_SUCCESS && 270 notif->ebs_status != IWM_SCAN_EBS_INACTIVE) 271 sc->last_ebs_successful = FALSE; 272 } 273 274 static int 275 iwm_mvm_scan_skip_channel(struct ieee80211_channel *c) 276 { 277 if (IEEE80211_IS_CHAN_2GHZ(c) && IEEE80211_IS_CHAN_B(c)) 278 return 0; 279 else if (IEEE80211_IS_CHAN_5GHZ(c) && IEEE80211_IS_CHAN_A(c)) 280 return 0; 281 else 282 return 1; 283 } 284 285 static uint8_t 286 iwm_mvm_lmac_scan_fill_channels(struct iwm_softc *sc, 287 struct iwm_scan_channel_cfg_lmac *chan, int n_ssids) 288 { 289 struct ieee80211com *ic = &sc->sc_ic; 290 struct ieee80211_scan_state *ss = ic->ic_scan; 291 struct ieee80211_channel *c; 292 uint8_t nchan; 293 int j; 294 295 for (nchan = j = 0; 296 j < ss->ss_last && nchan < sc->sc_fw.ucode_capa.n_scan_channels; 297 j++) { 298 c = ss->ss_chans[j]; 299 /* 300 * Catch other channels, in case we have 900MHz channels or 301 * something in the chanlist. 302 */ 303 if (!IEEE80211_IS_CHAN_2GHZ(c) && !IEEE80211_IS_CHAN_5GHZ(c)) { 304 IWM_DPRINTF(sc, IWM_DEBUG_RESET | IWM_DEBUG_EEPROM, 305 "%s: skipping channel (freq=%d, ieee=%d, flags=0x%08x)\n", 306 __func__, c->ic_freq, c->ic_ieee, c->ic_flags); 307 continue; 308 } 309 310 IWM_DPRINTF(sc, IWM_DEBUG_RESET | IWM_DEBUG_EEPROM, 311 "Adding channel %d (%d Mhz) to the list\n", 312 nchan, c->ic_freq); 313 chan->channel_num = htole16(ieee80211_mhz2ieee(c->ic_freq, 0)); 314 chan->iter_count = htole16(1); 315 chan->iter_interval = htole32(0); 316 chan->flags = htole32(IWM_UNIFIED_SCAN_CHANNEL_PARTIAL); 317 #if 0 /* makes scanning while associated less useful */ 318 if (n_ssids != 0) 319 chan->flags |= htole32(1 << 1); /* select SSID 0 */ 320 #endif 321 chan++; 322 nchan++; 323 } 324 325 return nchan; 326 } 327 328 static uint8_t 329 iwm_mvm_umac_scan_fill_channels(struct iwm_softc *sc, 330 struct iwm_scan_channel_cfg_umac *chan, int n_ssids) 331 { 332 struct ieee80211com *ic = &sc->sc_ic; 333 struct ieee80211_scan_state *ss = ic->ic_scan; 334 struct ieee80211_channel *c; 335 uint8_t nchan; 336 int j; 337 338 for (nchan = j = 0; 339 j < ss->ss_last && nchan < sc->sc_fw.ucode_capa.n_scan_channels; 340 j++) { 341 c = ss->ss_chans[j]; 342 /* 343 * Catch other channels, in case we have 900MHz channels or 344 * something in the chanlist. 345 */ 346 if (!IEEE80211_IS_CHAN_2GHZ(c) && !IEEE80211_IS_CHAN_5GHZ(c)) { 347 IWM_DPRINTF(sc, IWM_DEBUG_RESET | IWM_DEBUG_EEPROM, 348 "%s: skipping channel (freq=%d, ieee=%d, flags=0x%08x)\n", 349 __func__, c->ic_freq, c->ic_ieee, c->ic_flags); 350 continue; 351 } 352 353 IWM_DPRINTF(sc, IWM_DEBUG_RESET | IWM_DEBUG_EEPROM, 354 "Adding channel %d (%d Mhz) to the list\n", 355 nchan, c->ic_freq); 356 chan->channel_num = ieee80211_mhz2ieee(c->ic_freq, 0); 357 chan->iter_count = 1; 358 chan->iter_interval = htole16(0); 359 chan->flags = htole32(0); 360 #if 0 /* makes scanning while associated less useful */ 361 if (n_ssids != 0) 362 chan->flags = htole32(1 << 0); /* select SSID 0 */ 363 #endif 364 chan++; 365 nchan++; 366 } 367 368 return nchan; 369 } 370 371 static int 372 iwm_mvm_fill_probe_req(struct iwm_softc *sc, struct iwm_scan_probe_req *preq) 373 { 374 struct ieee80211com *ic = &sc->sc_ic; 375 struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps); 376 struct ieee80211_frame *wh = (struct ieee80211_frame *)preq->buf; 377 struct ieee80211_rateset *rs; 378 size_t remain = sizeof(preq->buf); 379 uint8_t *frm, *pos; 380 int ssid_len = 0; 381 const uint8_t *ssid = NULL; 382 383 memset(preq, 0, sizeof(*preq)); 384 385 /* Ensure enough space for header and SSID IE. */ 386 if (remain < sizeof(*wh) + 2 + ssid_len) 387 return ENOBUFS; 388 389 /* 390 * Build a probe request frame. Most of the following code is a 391 * copy & paste of what is done in net80211. 392 */ 393 wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_MGT | 394 IEEE80211_FC0_SUBTYPE_PROBE_REQ; 395 wh->i_fc[1] = IEEE80211_FC1_DIR_NODS; 396 IEEE80211_ADDR_COPY(wh->i_addr1, ieee80211broadcastaddr); 397 IEEE80211_ADDR_COPY(wh->i_addr2, vap ? vap->iv_myaddr : ic->ic_macaddr); 398 IEEE80211_ADDR_COPY(wh->i_addr3, ieee80211broadcastaddr); 399 *(uint16_t *)&wh->i_dur[0] = 0; /* filled by HW */ 400 *(uint16_t *)&wh->i_seq[0] = 0; /* filled by HW */ 401 402 frm = (uint8_t *)(wh + 1); 403 frm = ieee80211_add_ssid(frm, ssid, ssid_len); 404 405 /* Tell the firmware where the MAC header is. */ 406 preq->mac_header.offset = 0; 407 preq->mac_header.len = htole16(frm - (uint8_t *)wh); 408 remain -= frm - (uint8_t *)wh; 409 410 /* Fill in 2GHz IEs and tell firmware where they are. */ 411 rs = &ic->ic_sup_rates[IEEE80211_MODE_11G]; 412 if (rs->rs_nrates > IEEE80211_RATE_SIZE) { 413 if (remain < 4 + rs->rs_nrates) 414 return ENOBUFS; 415 } else if (remain < 2 + rs->rs_nrates) { 416 return ENOBUFS; 417 } 418 preq->band_data[0].offset = htole16(frm - (uint8_t *)wh); 419 pos = frm; 420 frm = ieee80211_add_rates(frm, rs); 421 if (rs->rs_nrates > IEEE80211_RATE_SIZE) 422 frm = ieee80211_add_xrates(frm, rs); 423 preq->band_data[0].len = htole16(frm - pos); 424 remain -= frm - pos; 425 426 if (iwm_mvm_rrm_scan_needed(sc)) { 427 if (remain < 3) 428 return ENOBUFS; 429 *frm++ = IEEE80211_ELEMID_DSPARMS; 430 *frm++ = 1; 431 *frm++ = 0; 432 remain -= 3; 433 } 434 435 if (sc->nvm_data->sku_cap_band_52GHz_enable) { 436 /* Fill in 5GHz IEs. */ 437 rs = &ic->ic_sup_rates[IEEE80211_MODE_11A]; 438 if (rs->rs_nrates > IEEE80211_RATE_SIZE) { 439 if (remain < 4 + rs->rs_nrates) 440 return ENOBUFS; 441 } else if (remain < 2 + rs->rs_nrates) { 442 return ENOBUFS; 443 } 444 preq->band_data[1].offset = htole16(frm - (uint8_t *)wh); 445 pos = frm; 446 frm = ieee80211_add_rates(frm, rs); 447 if (rs->rs_nrates > IEEE80211_RATE_SIZE) 448 frm = ieee80211_add_xrates(frm, rs); 449 preq->band_data[1].len = htole16(frm - pos); 450 remain -= frm - pos; 451 } 452 453 /* Send 11n IEs on both 2GHz and 5GHz bands. */ 454 preq->common_data.offset = htole16(frm - (uint8_t *)wh); 455 pos = frm; 456 #if 0 457 if (ic->ic_flags & IEEE80211_F_HTON) { 458 if (remain < 28) 459 return ENOBUFS; 460 frm = ieee80211_add_htcaps(frm, ic); 461 /* XXX add WME info? */ 462 } 463 #endif 464 preq->common_data.len = htole16(frm - pos); 465 466 return 0; 467 } 468 469 int 470 iwm_mvm_config_umac_scan(struct iwm_softc *sc) 471 { 472 struct ieee80211com *ic = &sc->sc_ic; 473 struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps); 474 475 struct iwm_scan_config *scan_config; 476 int ret, j, nchan; 477 size_t cmd_size; 478 struct ieee80211_channel *c; 479 struct iwm_host_cmd hcmd = { 480 .id = iwm_cmd_id(IWM_SCAN_CFG_CMD, IWM_ALWAYS_LONG_GROUP, 0), 481 .flags = IWM_CMD_SYNC, 482 }; 483 static const uint32_t rates = (IWM_SCAN_CONFIG_RATE_1M | 484 IWM_SCAN_CONFIG_RATE_2M | IWM_SCAN_CONFIG_RATE_5M | 485 IWM_SCAN_CONFIG_RATE_11M | IWM_SCAN_CONFIG_RATE_6M | 486 IWM_SCAN_CONFIG_RATE_9M | IWM_SCAN_CONFIG_RATE_12M | 487 IWM_SCAN_CONFIG_RATE_18M | IWM_SCAN_CONFIG_RATE_24M | 488 IWM_SCAN_CONFIG_RATE_36M | IWM_SCAN_CONFIG_RATE_48M | 489 IWM_SCAN_CONFIG_RATE_54M); 490 491 cmd_size = sizeof(*scan_config) + sc->sc_fw.ucode_capa.n_scan_channels; 492 493 scan_config = kmalloc(cmd_size, M_DEVBUF, M_INTWAIT | M_ZERO); 494 if (scan_config == NULL) 495 return ENOMEM; 496 497 scan_config->tx_chains = htole32(iwm_mvm_get_valid_tx_ant(sc)); 498 scan_config->rx_chains = htole32(iwm_mvm_get_valid_rx_ant(sc)); 499 scan_config->legacy_rates = htole32(rates | 500 IWM_SCAN_CONFIG_SUPPORTED_RATE(rates)); 501 502 /* These timings correspond to iwlwifi's UNASSOC scan. */ 503 scan_config->dwell_active = 10; 504 scan_config->dwell_passive = 110; 505 scan_config->dwell_fragmented = 44; 506 scan_config->dwell_extended = 90; 507 scan_config->out_of_channel_time = htole32(0); 508 scan_config->suspend_time = htole32(0); 509 510 IEEE80211_ADDR_COPY(scan_config->mac_addr, 511 vap ? vap->iv_myaddr : ic->ic_macaddr); 512 513 scan_config->bcast_sta_id = sc->sc_aux_sta.sta_id; 514 scan_config->channel_flags = IWM_CHANNEL_FLAG_EBS | 515 IWM_CHANNEL_FLAG_ACCURATE_EBS | IWM_CHANNEL_FLAG_EBS_ADD | 516 IWM_CHANNEL_FLAG_PRE_SCAN_PASSIVE2ACTIVE; 517 518 for (nchan = j = 0; 519 j < ic->ic_nchans && nchan < sc->sc_fw.ucode_capa.n_scan_channels; 520 j++) { 521 c = &ic->ic_channels[j]; 522 /* For 2GHz, only populate 11b channels */ 523 /* For 5GHz, only populate 11a channels */ 524 /* 525 * Catch other channels, in case we have 900MHz channels or 526 * something in the chanlist. 527 */ 528 if (iwm_mvm_scan_skip_channel(c)) 529 continue; 530 scan_config->channel_array[nchan++] = 531 ieee80211_mhz2ieee(c->ic_freq, 0); 532 } 533 534 scan_config->flags = htole32(IWM_SCAN_CONFIG_FLAG_ACTIVATE | 535 IWM_SCAN_CONFIG_FLAG_ALLOW_CHUB_REQS | 536 IWM_SCAN_CONFIG_FLAG_SET_TX_CHAINS | 537 IWM_SCAN_CONFIG_FLAG_SET_RX_CHAINS | 538 IWM_SCAN_CONFIG_FLAG_SET_AUX_STA_ID | 539 IWM_SCAN_CONFIG_FLAG_SET_ALL_TIMES | 540 IWM_SCAN_CONFIG_FLAG_SET_LEGACY_RATES | 541 IWM_SCAN_CONFIG_FLAG_SET_MAC_ADDR | 542 IWM_SCAN_CONFIG_FLAG_SET_CHANNEL_FLAGS| 543 IWM_SCAN_CONFIG_N_CHANNELS(nchan) | 544 IWM_SCAN_CONFIG_FLAG_CLEAR_FRAGMENTED); 545 546 hcmd.data[0] = scan_config; 547 hcmd.len[0] = cmd_size; 548 549 IWM_DPRINTF(sc, IWM_DEBUG_SCAN, "Sending UMAC scan config\n"); 550 551 ret = iwm_send_cmd(sc, &hcmd); 552 if (!ret) 553 IWM_DPRINTF(sc, IWM_DEBUG_SCAN, 554 "UMAC scan config was sent successfully\n"); 555 556 kfree(scan_config, M_DEVBUF); 557 return ret; 558 } 559 560 static boolean_t 561 iwm_mvm_scan_use_ebs(struct iwm_softc *sc) 562 { 563 const struct iwm_ucode_capabilities *capa = &sc->sc_fw.ucode_capa; 564 565 /* We can only use EBS if: 566 * 1. the feature is supported; 567 * 2. the last EBS was successful; 568 * 3. if only single scan, the single scan EBS API is supported; 569 * 4. it's not a p2p find operation. 570 */ 571 return ((capa->flags & IWM_UCODE_TLV_FLAGS_EBS_SUPPORT) && 572 sc->last_ebs_successful); 573 } 574 575 int 576 iwm_mvm_umac_scan(struct iwm_softc *sc) 577 { 578 struct iwm_host_cmd hcmd = { 579 .id = iwm_cmd_id(IWM_SCAN_REQ_UMAC, IWM_ALWAYS_LONG_GROUP, 0), 580 .len = { 0, }, 581 .data = { NULL, }, 582 .flags = IWM_CMD_SYNC, 583 }; 584 struct iwm_scan_req_umac *req; 585 struct iwm_scan_req_umac_tail *tail; 586 size_t req_len; 587 int ssid_len = 0; 588 const uint8_t *ssid = NULL; 589 int ret; 590 591 req_len = sizeof(struct iwm_scan_req_umac) + 592 (sizeof(struct iwm_scan_channel_cfg_umac) * 593 sc->sc_fw.ucode_capa.n_scan_channels) + 594 sizeof(struct iwm_scan_req_umac_tail); 595 if (req_len > IWM_MAX_CMD_PAYLOAD_SIZE) 596 return ENOMEM; 597 req = kmalloc(req_len, M_DEVBUF, M_INTWAIT | M_ZERO); 598 if (req == NULL) 599 return ENOMEM; 600 601 hcmd.len[0] = (uint16_t)req_len; 602 hcmd.data[0] = (void *)req; 603 604 IWM_DPRINTF(sc, IWM_DEBUG_SCAN, "Handling ieee80211 scan request\n"); 605 606 /* These timings correspond to iwlwifi's UNASSOC scan. */ 607 req->active_dwell = 10; 608 req->passive_dwell = 110; 609 req->fragmented_dwell = 44; 610 req->extended_dwell = 90; 611 req->max_out_time = 0; 612 req->suspend_time = 0; 613 614 req->scan_priority = htole32(IWM_SCAN_PRIORITY_HIGH); 615 req->ooc_priority = htole32(IWM_SCAN_PRIORITY_HIGH); 616 617 req->n_channels = iwm_mvm_umac_scan_fill_channels(sc, 618 (struct iwm_scan_channel_cfg_umac *)req->data, ssid_len != 0); 619 620 req->general_flags = htole32(IWM_UMAC_SCAN_GEN_FLAGS_PASS_ALL | 621 IWM_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE | 622 IWM_UMAC_SCAN_GEN_FLAGS_EXTENDED_DWELL); 623 624 if (iwm_mvm_rrm_scan_needed(sc)) 625 req->general_flags |= 626 htole32(IWM_UMAC_SCAN_GEN_FLAGS_RRM_ENABLED); 627 628 tail = (void *)((char *)&req->data + 629 sizeof(struct iwm_scan_channel_cfg_umac) * 630 sc->sc_fw.ucode_capa.n_scan_channels); 631 632 /* Check if we're doing an active directed scan. */ 633 if (ssid_len != 0) { 634 tail->direct_scan[0].id = IEEE80211_ELEMID_SSID; 635 tail->direct_scan[0].len = ssid_len; 636 memcpy(tail->direct_scan[0].ssid, ssid, ssid_len); 637 req->general_flags |= 638 htole32(IWM_UMAC_SCAN_GEN_FLAGS_PRE_CONNECT); 639 } else { 640 req->general_flags |= htole32(IWM_UMAC_SCAN_GEN_FLAGS_PASSIVE); 641 } 642 643 if (iwm_mvm_scan_use_ebs(sc)) 644 req->channel_flags = IWM_SCAN_CHANNEL_FLAG_EBS | 645 IWM_SCAN_CHANNEL_FLAG_EBS_ACCURATE | 646 IWM_SCAN_CHANNEL_FLAG_CACHE_ADD; 647 648 ret = iwm_mvm_fill_probe_req(sc, &tail->preq); 649 if (ret) { 650 kfree(req, M_DEVBUF); 651 return ret; 652 } 653 654 /* Specify the scan plan: We'll do one iteration. */ 655 tail->schedule[0].interval = 0; 656 tail->schedule[0].iter_count = 1; 657 658 ret = iwm_send_cmd(sc, &hcmd); 659 if (!ret) 660 IWM_DPRINTF(sc, IWM_DEBUG_SCAN, 661 "Scan request was sent successfully\n"); 662 kfree(req, M_DEVBUF); 663 return ret; 664 } 665 666 int 667 iwm_mvm_lmac_scan(struct iwm_softc *sc) 668 { 669 struct iwm_host_cmd hcmd = { 670 .id = IWM_SCAN_OFFLOAD_REQUEST_CMD, 671 .len = { 0, }, 672 .data = { NULL, }, 673 .flags = IWM_CMD_SYNC, 674 }; 675 struct iwm_scan_req_lmac *req; 676 size_t req_len; 677 int ret; 678 int ssid_len = 0; 679 const uint8_t *ssid = NULL; 680 681 IWM_DPRINTF(sc, IWM_DEBUG_SCAN, 682 "Handling ieee80211 scan request\n"); 683 684 req_len = sizeof(struct iwm_scan_req_lmac) + 685 (sizeof(struct iwm_scan_channel_cfg_lmac) * 686 sc->sc_fw.ucode_capa.n_scan_channels) + 687 sizeof(struct iwm_scan_probe_req); 688 if (req_len > IWM_MAX_CMD_PAYLOAD_SIZE) 689 return ENOMEM; 690 req = kmalloc(req_len, M_DEVBUF, M_INTWAIT | M_ZERO); 691 if (req == NULL) 692 return ENOMEM; 693 694 hcmd.len[0] = (uint16_t)req_len; 695 hcmd.data[0] = (void *)req; 696 697 /* These timings correspond to iwlwifi's UNASSOC scan. */ 698 req->active_dwell = 10; 699 req->passive_dwell = 110; 700 req->fragmented_dwell = 44; 701 req->extended_dwell = 90; 702 req->max_out_time = 0; 703 req->suspend_time = 0; 704 705 req->scan_prio = htole32(IWM_SCAN_PRIORITY_HIGH); 706 req->rx_chain_select = iwm_mvm_scan_rx_chain(sc); 707 req->iter_num = htole32(1); 708 req->delay = 0; 709 710 req->scan_flags = htole32(IWM_MVM_LMAC_SCAN_FLAG_PASS_ALL | 711 IWM_MVM_LMAC_SCAN_FLAG_ITER_COMPLETE | 712 IWM_MVM_LMAC_SCAN_FLAG_EXTENDED_DWELL); 713 if (ssid_len == 0) 714 req->scan_flags |= htole32(IWM_MVM_LMAC_SCAN_FLAG_PASSIVE); 715 else 716 req->scan_flags |= 717 htole32(IWM_MVM_LMAC_SCAN_FLAG_PRE_CONNECTION); 718 if (iwm_mvm_rrm_scan_needed(sc)) 719 req->scan_flags |= htole32(IWM_MVM_LMAC_SCAN_FLAGS_RRM_ENABLED); 720 721 req->flags = iwm_mvm_scan_rxon_flags(sc->sc_ic.ic_scan->ss_chans[0]); 722 req->filter_flags = 723 htole32(IWM_MAC_FILTER_ACCEPT_GRP | IWM_MAC_FILTER_IN_BEACON); 724 725 /* Tx flags 2 GHz. */ 726 req->tx_cmd[0].tx_flags = htole32(IWM_TX_CMD_FLG_SEQ_CTL | 727 IWM_TX_CMD_FLG_BT_DIS); 728 req->tx_cmd[0].rate_n_flags = 729 iwm_mvm_scan_rate_n_flags(sc, IEEE80211_CHAN_2GHZ, 1/*XXX*/); 730 req->tx_cmd[0].sta_id = sc->sc_aux_sta.sta_id; 731 732 /* Tx flags 5 GHz. */ 733 req->tx_cmd[1].tx_flags = htole32(IWM_TX_CMD_FLG_SEQ_CTL | 734 IWM_TX_CMD_FLG_BT_DIS); 735 req->tx_cmd[1].rate_n_flags = 736 iwm_mvm_scan_rate_n_flags(sc, IEEE80211_CHAN_5GHZ, 1/*XXX*/); 737 req->tx_cmd[1].sta_id = sc->sc_aux_sta.sta_id; 738 739 /* Check if we're doing an active directed scan. */ 740 if (ssid_len != 0) { 741 req->direct_scan[0].id = IEEE80211_ELEMID_SSID; 742 req->direct_scan[0].len = ssid_len; 743 memcpy(req->direct_scan[0].ssid, ssid, ssid_len); 744 } 745 746 req->n_channels = iwm_mvm_lmac_scan_fill_channels(sc, 747 (struct iwm_scan_channel_cfg_lmac *)req->data, 748 ssid_len != 0); 749 750 ret = iwm_mvm_fill_probe_req(sc, 751 (struct iwm_scan_probe_req *)(req->data + 752 (sizeof(struct iwm_scan_channel_cfg_lmac) * 753 sc->sc_fw.ucode_capa.n_scan_channels))); 754 if (ret) { 755 kfree(req, M_DEVBUF); 756 return ret; 757 } 758 759 /* Specify the scan plan: We'll do one iteration. */ 760 req->schedule[0].iterations = 1; 761 req->schedule[0].full_scan_mul = 1; 762 763 if (iwm_mvm_scan_use_ebs(sc)) { 764 req->channel_opt[0].flags = 765 htole16(IWM_SCAN_CHANNEL_FLAG_EBS | 766 IWM_SCAN_CHANNEL_FLAG_EBS_ACCURATE | 767 IWM_SCAN_CHANNEL_FLAG_CACHE_ADD); 768 req->channel_opt[0].non_ebs_ratio = 769 htole16(IWM_DENSE_EBS_SCAN_RATIO); 770 req->channel_opt[1].flags = 771 htole16(IWM_SCAN_CHANNEL_FLAG_EBS | 772 IWM_SCAN_CHANNEL_FLAG_EBS_ACCURATE | 773 IWM_SCAN_CHANNEL_FLAG_CACHE_ADD); 774 req->channel_opt[1].non_ebs_ratio = 775 htole16(IWM_SPARSE_EBS_SCAN_RATIO); 776 } 777 778 ret = iwm_send_cmd(sc, &hcmd); 779 if (!ret) { 780 IWM_DPRINTF(sc, IWM_DEBUG_SCAN, 781 "Scan request was sent successfully\n"); 782 } 783 kfree(req, M_DEVBUF); 784 return ret; 785 } 786 787 static int 788 iwm_mvm_lmac_scan_abort(struct iwm_softc *sc) 789 { 790 int ret; 791 struct iwm_host_cmd hcmd = { 792 .id = IWM_SCAN_OFFLOAD_ABORT_CMD, 793 .len = { 0, }, 794 .data = { NULL, }, 795 .flags = IWM_CMD_SYNC, 796 }; 797 uint32_t status; 798 799 ret = iwm_mvm_send_cmd_status(sc, &hcmd, &status); 800 if (ret) 801 return ret; 802 803 if (status != IWM_CAN_ABORT_STATUS) { 804 /* 805 * The scan abort will return 1 for success or 806 * 2 for "failure". A failure condition can be 807 * due to simply not being in an active scan which 808 * can occur if we send the scan abort before the 809 * microcode has notified us that a scan is completed. 810 */ 811 IWM_DPRINTF(sc, IWM_DEBUG_SCAN, 812 "SCAN OFFLOAD ABORT ret %d.\n", status); 813 ret = ENOENT; 814 } 815 816 return ret; 817 } 818 819 static int 820 iwm_mvm_umac_scan_abort(struct iwm_softc *sc) 821 { 822 struct iwm_umac_scan_abort cmd = {}; 823 int uid, ret; 824 825 uid = 0; 826 cmd.uid = htole32(uid); 827 828 IWM_DPRINTF(sc, IWM_DEBUG_SCAN, "Sending scan abort, uid %u\n", uid); 829 830 ret = iwm_mvm_send_cmd_pdu(sc, 831 iwm_cmd_id(IWM_SCAN_ABORT_UMAC, 832 IWM_ALWAYS_LONG_GROUP, 0), 833 0, sizeof(cmd), &cmd); 834 835 return ret; 836 } 837 838 int 839 iwm_mvm_scan_stop_wait(struct iwm_softc *sc) 840 { 841 struct iwm_notification_wait wait_scan_done; 842 static const uint16_t scan_done_notif[] = { IWM_SCAN_COMPLETE_UMAC, 843 IWM_SCAN_OFFLOAD_COMPLETE, }; 844 int ret; 845 846 iwm_init_notification_wait(sc->sc_notif_wait, &wait_scan_done, 847 scan_done_notif, NELEM(scan_done_notif), 848 NULL, NULL); 849 850 IWM_DPRINTF(sc, IWM_DEBUG_SCAN, "Preparing to stop scan\n"); 851 852 if (fw_has_capa(&sc->sc_fw.ucode_capa, IWM_UCODE_TLV_CAPA_UMAC_SCAN)) 853 ret = iwm_mvm_umac_scan_abort(sc); 854 else 855 ret = iwm_mvm_lmac_scan_abort(sc); 856 857 if (ret) { 858 IWM_DPRINTF(sc, IWM_DEBUG_SCAN, "couldn't stop scan\n"); 859 iwm_remove_notification(sc->sc_notif_wait, &wait_scan_done); 860 return ret; 861 } 862 863 IWM_UNLOCK(sc); 864 ret = iwm_wait_notification(sc->sc_notif_wait, &wait_scan_done, hz); 865 IWM_LOCK(sc); 866 867 return ret; 868 } 869