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 "opt_wlan.h" 109 #include "opt_iwm.h" 110 111 #include <sys/param.h> 112 #include <sys/bus.h> 113 #include <sys/conf.h> 114 #include <sys/endian.h> 115 #include <sys/firmware.h> 116 #include <sys/kernel.h> 117 #include <sys/malloc.h> 118 #include <sys/mbuf.h> 119 #include <sys/mutex.h> 120 #include <sys/module.h> 121 #include <sys/proc.h> 122 #include <sys/rman.h> 123 #include <sys/socket.h> 124 #include <sys/sockio.h> 125 #include <sys/sysctl.h> 126 #include <sys/linker.h> 127 128 #include <machine/bus.h> 129 #include <machine/endian.h> 130 #include <machine/resource.h> 131 132 #include <dev/pci/pcivar.h> 133 #include <dev/pci/pcireg.h> 134 135 #include <net/bpf.h> 136 137 #include <net/if.h> 138 #include <net/if_var.h> 139 #include <net/if_arp.h> 140 #include <net/if_dl.h> 141 #include <net/if_media.h> 142 #include <net/if_types.h> 143 144 #include <netinet/in.h> 145 #include <netinet/in_systm.h> 146 #include <netinet/if_ether.h> 147 #include <netinet/ip.h> 148 149 #include <net80211/ieee80211_var.h> 150 #include <net80211/ieee80211_regdomain.h> 151 #include <net80211/ieee80211_ratectl.h> 152 #include <net80211/ieee80211_radiotap.h> 153 154 #include <dev/iwm/if_iwmreg.h> 155 #include <dev/iwm/if_iwmvar.h> 156 #include <dev/iwm/if_iwm_debug.h> 157 #include <dev/iwm/if_iwm_notif_wait.h> 158 #include <dev/iwm/if_iwm_util.h> 159 #include <dev/iwm/if_iwm_scan.h> 160 161 /* 162 * BEGIN mvm/scan.c 163 */ 164 165 #define IWM_DENSE_EBS_SCAN_RATIO 5 166 #define IWM_SPARSE_EBS_SCAN_RATIO 1 167 168 static uint16_t 169 iwm_mvm_scan_rx_chain(struct iwm_softc *sc) 170 { 171 uint16_t rx_chain; 172 uint8_t rx_ant; 173 174 rx_ant = iwm_mvm_get_valid_rx_ant(sc); 175 rx_chain = rx_ant << IWM_PHY_RX_CHAIN_VALID_POS; 176 rx_chain |= rx_ant << IWM_PHY_RX_CHAIN_FORCE_MIMO_SEL_POS; 177 rx_chain |= rx_ant << IWM_PHY_RX_CHAIN_FORCE_SEL_POS; 178 rx_chain |= 0x1 << IWM_PHY_RX_CHAIN_DRIVER_FORCE_POS; 179 return htole16(rx_chain); 180 } 181 182 static uint32_t 183 iwm_mvm_scan_rxon_flags(struct ieee80211_channel *c) 184 { 185 if (IEEE80211_IS_CHAN_2GHZ(c)) 186 return htole32(IWM_PHY_BAND_24); 187 else 188 return htole32(IWM_PHY_BAND_5); 189 } 190 191 static uint32_t 192 iwm_mvm_scan_rate_n_flags(struct iwm_softc *sc, int flags, int no_cck) 193 { 194 uint32_t tx_ant; 195 int i, ind; 196 197 for (i = 0, ind = sc->sc_scan_last_antenna; 198 i < IWM_RATE_MCS_ANT_NUM; i++) { 199 ind = (ind + 1) % IWM_RATE_MCS_ANT_NUM; 200 if (iwm_mvm_get_valid_tx_ant(sc) & (1 << ind)) { 201 sc->sc_scan_last_antenna = ind; 202 break; 203 } 204 } 205 tx_ant = (1 << sc->sc_scan_last_antenna) << IWM_RATE_MCS_ANT_POS; 206 207 if ((flags & IEEE80211_CHAN_2GHZ) && !no_cck) 208 return htole32(IWM_RATE_1M_PLCP | IWM_RATE_MCS_CCK_MSK | 209 tx_ant); 210 else 211 return htole32(IWM_RATE_6M_PLCP | tx_ant); 212 } 213 214 static inline boolean_t 215 iwm_mvm_rrm_scan_needed(struct iwm_softc *sc) 216 { 217 /* require rrm scan whenever the fw supports it */ 218 return fw_has_capa(&sc->ucode_capa, 219 IWM_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT); 220 } 221 222 #ifdef IWM_DEBUG 223 static const char * 224 iwm_mvm_ebs_status_str(enum iwm_scan_ebs_status status) 225 { 226 switch (status) { 227 case IWM_SCAN_EBS_SUCCESS: 228 return "successful"; 229 case IWM_SCAN_EBS_INACTIVE: 230 return "inactive"; 231 case IWM_SCAN_EBS_FAILED: 232 case IWM_SCAN_EBS_CHAN_NOT_FOUND: 233 default: 234 return "failed"; 235 } 236 } 237 238 static const char * 239 iwm_mvm_offload_status_str(enum iwm_scan_offload_complete_status status) 240 { 241 return (status == IWM_SCAN_OFFLOAD_ABORTED) ? "aborted" : "completed"; 242 } 243 #endif 244 245 void 246 iwm_mvm_rx_lmac_scan_complete_notif(struct iwm_softc *sc, 247 struct iwm_rx_packet *pkt) 248 { 249 struct iwm_periodic_scan_complete *scan_notif = (void *)pkt->data; 250 251 /* If this happens, the firmware has mistakenly sent an LMAC 252 * notification during UMAC scans -- warn and ignore it. 253 */ 254 if (fw_has_capa(&sc->ucode_capa, IWM_UCODE_TLV_CAPA_UMAC_SCAN)) { 255 device_printf(sc->sc_dev, 256 "%s: Mistakenly got LMAC notification during UMAC scan\n", 257 __func__); 258 return; 259 } 260 261 IWM_DPRINTF(sc, IWM_DEBUG_SCAN, "Regular scan %s, EBS status %s (FW)\n", 262 iwm_mvm_offload_status_str(scan_notif->status), 263 iwm_mvm_ebs_status_str(scan_notif->ebs_status)); 264 265 sc->last_ebs_successful = 266 scan_notif->ebs_status == IWM_SCAN_EBS_SUCCESS || 267 scan_notif->ebs_status == IWM_SCAN_EBS_INACTIVE; 268 269 } 270 271 void 272 iwm_mvm_rx_umac_scan_complete_notif(struct iwm_softc *sc, 273 struct iwm_rx_packet *pkt) 274 { 275 struct iwm_umac_scan_complete *notif = (void *)pkt->data; 276 277 IWM_DPRINTF(sc, IWM_DEBUG_SCAN, 278 "Scan completed, uid %u, status %s, EBS status %s\n", 279 le32toh(notif->uid), 280 iwm_mvm_offload_status_str(notif->status), 281 iwm_mvm_ebs_status_str(notif->ebs_status)); 282 283 if (notif->ebs_status != IWM_SCAN_EBS_SUCCESS && 284 notif->ebs_status != IWM_SCAN_EBS_INACTIVE) 285 sc->last_ebs_successful = FALSE; 286 } 287 288 static int 289 iwm_mvm_scan_skip_channel(struct ieee80211_channel *c) 290 { 291 if (IEEE80211_IS_CHAN_2GHZ(c) && IEEE80211_IS_CHAN_B(c)) 292 return 0; 293 else if (IEEE80211_IS_CHAN_5GHZ(c) && IEEE80211_IS_CHAN_A(c)) 294 return 0; 295 else 296 return 1; 297 } 298 299 static uint8_t 300 iwm_mvm_lmac_scan_fill_channels(struct iwm_softc *sc, 301 struct iwm_scan_channel_cfg_lmac *chan, int n_ssids) 302 { 303 struct ieee80211com *ic = &sc->sc_ic; 304 struct ieee80211_scan_state *ss = ic->ic_scan; 305 struct ieee80211_channel *c; 306 uint8_t nchan; 307 int j; 308 309 for (nchan = j = 0; 310 j < ss->ss_last && nchan < sc->ucode_capa.n_scan_channels; j++) { 311 c = ss->ss_chans[j]; 312 /* 313 * Catch other channels, in case we have 900MHz channels or 314 * something in the chanlist. 315 */ 316 if (!IEEE80211_IS_CHAN_2GHZ(c) && !IEEE80211_IS_CHAN_5GHZ(c)) { 317 IWM_DPRINTF(sc, IWM_DEBUG_RESET | IWM_DEBUG_EEPROM, 318 "%s: skipping channel (freq=%d, ieee=%d, flags=0x%08x)\n", 319 __func__, c->ic_freq, c->ic_ieee, c->ic_flags); 320 continue; 321 } 322 323 IWM_DPRINTF(sc, IWM_DEBUG_RESET | IWM_DEBUG_EEPROM, 324 "Adding channel %d (%d Mhz) to the list\n", 325 nchan, c->ic_freq); 326 chan->channel_num = htole16(ieee80211_mhz2ieee(c->ic_freq, 0)); 327 chan->iter_count = htole16(1); 328 chan->iter_interval = htole32(0); 329 chan->flags = htole32(IWM_UNIFIED_SCAN_CHANNEL_PARTIAL); 330 chan->flags |= htole32(IWM_SCAN_CHANNEL_NSSIDS(n_ssids)); 331 /* XXX IEEE80211_SCAN_NOBCAST flag is never set. */ 332 if (!IEEE80211_IS_CHAN_PASSIVE(c) && 333 (!(ss->ss_flags & IEEE80211_SCAN_NOBCAST) || n_ssids != 0)) 334 chan->flags |= htole32(IWM_SCAN_CHANNEL_TYPE_ACTIVE); 335 chan++; 336 nchan++; 337 } 338 339 return nchan; 340 } 341 342 static uint8_t 343 iwm_mvm_umac_scan_fill_channels(struct iwm_softc *sc, 344 struct iwm_scan_channel_cfg_umac *chan, int n_ssids) 345 { 346 struct ieee80211com *ic = &sc->sc_ic; 347 struct ieee80211_scan_state *ss = ic->ic_scan; 348 struct ieee80211_channel *c; 349 uint8_t nchan; 350 int j; 351 352 for (nchan = j = 0; 353 j < ss->ss_last && nchan < sc->ucode_capa.n_scan_channels; j++) { 354 c = ss->ss_chans[j]; 355 /* 356 * Catch other channels, in case we have 900MHz channels or 357 * something in the chanlist. 358 */ 359 if (!IEEE80211_IS_CHAN_2GHZ(c) && !IEEE80211_IS_CHAN_5GHZ(c)) { 360 IWM_DPRINTF(sc, IWM_DEBUG_RESET | IWM_DEBUG_EEPROM, 361 "%s: skipping channel (freq=%d, ieee=%d, flags=0x%08x)\n", 362 __func__, c->ic_freq, c->ic_ieee, c->ic_flags); 363 continue; 364 } 365 366 IWM_DPRINTF(sc, IWM_DEBUG_RESET | IWM_DEBUG_EEPROM, 367 "Adding channel %d (%d Mhz) to the list\n", 368 nchan, c->ic_freq); 369 chan->channel_num = ieee80211_mhz2ieee(c->ic_freq, 0); 370 chan->iter_count = 1; 371 chan->iter_interval = htole16(0); 372 chan->flags = htole32(IWM_SCAN_CHANNEL_UMAC_NSSIDS(n_ssids)); 373 chan++; 374 nchan++; 375 } 376 377 return nchan; 378 } 379 380 static int 381 iwm_mvm_fill_probe_req(struct iwm_softc *sc, struct iwm_scan_probe_req *preq) 382 { 383 struct ieee80211com *ic = &sc->sc_ic; 384 struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps); 385 struct ieee80211_frame *wh = (struct ieee80211_frame *)preq->buf; 386 struct ieee80211_rateset *rs; 387 size_t remain = sizeof(preq->buf); 388 uint8_t *frm, *pos; 389 390 memset(preq, 0, sizeof(*preq)); 391 392 /* Ensure enough space for header and SSID IE. */ 393 if (remain < sizeof(*wh) + 2) 394 return ENOBUFS; 395 396 /* 397 * Build a probe request frame. Most of the following code is a 398 * copy & paste of what is done in net80211. 399 */ 400 wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_MGT | 401 IEEE80211_FC0_SUBTYPE_PROBE_REQ; 402 wh->i_fc[1] = IEEE80211_FC1_DIR_NODS; 403 IEEE80211_ADDR_COPY(wh->i_addr1, ieee80211broadcastaddr); 404 IEEE80211_ADDR_COPY(wh->i_addr2, vap ? vap->iv_myaddr : ic->ic_macaddr); 405 IEEE80211_ADDR_COPY(wh->i_addr3, ieee80211broadcastaddr); 406 *(uint16_t *)&wh->i_dur[0] = 0; /* filled by HW */ 407 *(uint16_t *)&wh->i_seq[0] = 0; /* filled by HW */ 408 409 frm = (uint8_t *)(wh + 1); 410 frm = ieee80211_add_ssid(frm, NULL, 0); 411 412 /* Tell the firmware where the MAC header is. */ 413 preq->mac_header.offset = 0; 414 preq->mac_header.len = htole16(frm - (uint8_t *)wh); 415 remain -= frm - (uint8_t *)wh; 416 417 /* Fill in 2GHz IEs and tell firmware where they are. */ 418 rs = &ic->ic_sup_rates[IEEE80211_MODE_11G]; 419 if (rs->rs_nrates > IEEE80211_RATE_SIZE) { 420 if (remain < 4 + rs->rs_nrates) 421 return ENOBUFS; 422 } else if (remain < 2 + rs->rs_nrates) { 423 return ENOBUFS; 424 } 425 preq->band_data[0].offset = htole16(frm - (uint8_t *)wh); 426 pos = frm; 427 frm = ieee80211_add_rates(frm, rs); 428 if (rs->rs_nrates > IEEE80211_RATE_SIZE) 429 frm = ieee80211_add_xrates(frm, rs); 430 preq->band_data[0].len = htole16(frm - pos); 431 remain -= frm - pos; 432 433 if (iwm_mvm_rrm_scan_needed(sc)) { 434 if (remain < 3) 435 return ENOBUFS; 436 *frm++ = IEEE80211_ELEMID_DSPARMS; 437 *frm++ = 1; 438 *frm++ = 0; 439 remain -= 3; 440 } 441 442 if (sc->nvm_data->sku_cap_band_52GHz_enable) { 443 /* Fill in 5GHz IEs. */ 444 rs = &ic->ic_sup_rates[IEEE80211_MODE_11A]; 445 if (rs->rs_nrates > IEEE80211_RATE_SIZE) { 446 if (remain < 4 + rs->rs_nrates) 447 return ENOBUFS; 448 } else if (remain < 2 + rs->rs_nrates) { 449 return ENOBUFS; 450 } 451 preq->band_data[1].offset = htole16(frm - (uint8_t *)wh); 452 pos = frm; 453 frm = ieee80211_add_rates(frm, rs); 454 if (rs->rs_nrates > IEEE80211_RATE_SIZE) 455 frm = ieee80211_add_xrates(frm, rs); 456 preq->band_data[1].len = htole16(frm - pos); 457 remain -= frm - pos; 458 } 459 460 /* Send 11n IEs on both 2GHz and 5GHz bands. */ 461 preq->common_data.offset = htole16(frm - (uint8_t *)wh); 462 pos = frm; 463 #if 0 464 if (ic->ic_flags & IEEE80211_F_HTON) { 465 if (remain < 28) 466 return ENOBUFS; 467 frm = ieee80211_add_htcaps(frm, ic); 468 /* XXX add WME info? */ 469 } 470 #endif 471 preq->common_data.len = htole16(frm - pos); 472 473 return 0; 474 } 475 476 int 477 iwm_mvm_config_umac_scan(struct iwm_softc *sc) 478 { 479 struct ieee80211com *ic = &sc->sc_ic; 480 struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps); 481 482 struct iwm_scan_config *scan_config; 483 int ret, j, nchan; 484 size_t cmd_size; 485 struct ieee80211_channel *c; 486 struct iwm_host_cmd hcmd = { 487 .id = iwm_cmd_id(IWM_SCAN_CFG_CMD, IWM_ALWAYS_LONG_GROUP, 0), 488 .flags = IWM_CMD_SYNC, 489 }; 490 static const uint32_t rates = (IWM_SCAN_CONFIG_RATE_1M | 491 IWM_SCAN_CONFIG_RATE_2M | IWM_SCAN_CONFIG_RATE_5M | 492 IWM_SCAN_CONFIG_RATE_11M | IWM_SCAN_CONFIG_RATE_6M | 493 IWM_SCAN_CONFIG_RATE_9M | IWM_SCAN_CONFIG_RATE_12M | 494 IWM_SCAN_CONFIG_RATE_18M | IWM_SCAN_CONFIG_RATE_24M | 495 IWM_SCAN_CONFIG_RATE_36M | IWM_SCAN_CONFIG_RATE_48M | 496 IWM_SCAN_CONFIG_RATE_54M); 497 498 cmd_size = sizeof(*scan_config) + sc->ucode_capa.n_scan_channels; 499 500 scan_config = malloc(cmd_size, M_DEVBUF, M_NOWAIT | M_ZERO); 501 if (scan_config == NULL) 502 return ENOMEM; 503 504 scan_config->tx_chains = htole32(iwm_mvm_get_valid_tx_ant(sc)); 505 scan_config->rx_chains = htole32(iwm_mvm_get_valid_rx_ant(sc)); 506 scan_config->legacy_rates = htole32(rates | 507 IWM_SCAN_CONFIG_SUPPORTED_RATE(rates)); 508 509 /* These timings correspond to iwlwifi's UNASSOC scan. */ 510 scan_config->dwell_active = 10; 511 scan_config->dwell_passive = 110; 512 scan_config->dwell_fragmented = 44; 513 scan_config->dwell_extended = 90; 514 scan_config->out_of_channel_time = htole32(0); 515 scan_config->suspend_time = htole32(0); 516 517 IEEE80211_ADDR_COPY(scan_config->mac_addr, 518 vap ? vap->iv_myaddr : ic->ic_macaddr); 519 520 scan_config->bcast_sta_id = sc->sc_aux_sta.sta_id; 521 scan_config->channel_flags = IWM_CHANNEL_FLAG_EBS | 522 IWM_CHANNEL_FLAG_ACCURATE_EBS | IWM_CHANNEL_FLAG_EBS_ADD | 523 IWM_CHANNEL_FLAG_PRE_SCAN_PASSIVE2ACTIVE; 524 525 for (nchan = j = 0; 526 j < ic->ic_nchans && nchan < sc->ucode_capa.n_scan_channels; j++) { 527 c = &ic->ic_channels[j]; 528 /* For 2GHz, only populate 11b channels */ 529 /* For 5GHz, only populate 11a channels */ 530 /* 531 * Catch other channels, in case we have 900MHz channels or 532 * something in the chanlist. 533 */ 534 if (iwm_mvm_scan_skip_channel(c)) 535 continue; 536 scan_config->channel_array[nchan++] = 537 ieee80211_mhz2ieee(c->ic_freq, 0); 538 } 539 540 scan_config->flags = htole32(IWM_SCAN_CONFIG_FLAG_ACTIVATE | 541 IWM_SCAN_CONFIG_FLAG_ALLOW_CHUB_REQS | 542 IWM_SCAN_CONFIG_FLAG_SET_TX_CHAINS | 543 IWM_SCAN_CONFIG_FLAG_SET_RX_CHAINS | 544 IWM_SCAN_CONFIG_FLAG_SET_AUX_STA_ID | 545 IWM_SCAN_CONFIG_FLAG_SET_ALL_TIMES | 546 IWM_SCAN_CONFIG_FLAG_SET_LEGACY_RATES | 547 IWM_SCAN_CONFIG_FLAG_SET_MAC_ADDR | 548 IWM_SCAN_CONFIG_FLAG_SET_CHANNEL_FLAGS| 549 IWM_SCAN_CONFIG_N_CHANNELS(nchan) | 550 IWM_SCAN_CONFIG_FLAG_CLEAR_FRAGMENTED); 551 552 hcmd.data[0] = scan_config; 553 hcmd.len[0] = cmd_size; 554 555 IWM_DPRINTF(sc, IWM_DEBUG_SCAN, "Sending UMAC scan config\n"); 556 557 ret = iwm_send_cmd(sc, &hcmd); 558 if (!ret) 559 IWM_DPRINTF(sc, IWM_DEBUG_SCAN, 560 "UMAC scan config was sent successfully\n"); 561 562 free(scan_config, M_DEVBUF); 563 return ret; 564 } 565 566 static boolean_t 567 iwm_mvm_scan_use_ebs(struct iwm_softc *sc) 568 { 569 const struct iwm_ucode_capabilities *capa = &sc->ucode_capa; 570 571 /* We can only use EBS if: 572 * 1. the feature is supported; 573 * 2. the last EBS was successful; 574 * 3. if only single scan, the single scan EBS API is supported; 575 * 4. it's not a p2p find operation. 576 */ 577 return ((capa->flags & IWM_UCODE_TLV_FLAGS_EBS_SUPPORT) && 578 sc->last_ebs_successful); 579 } 580 581 int 582 iwm_mvm_umac_scan(struct iwm_softc *sc) 583 { 584 struct iwm_host_cmd hcmd = { 585 .id = iwm_cmd_id(IWM_SCAN_REQ_UMAC, IWM_ALWAYS_LONG_GROUP, 0), 586 .len = { 0, }, 587 .data = { NULL, }, 588 .flags = IWM_CMD_SYNC, 589 }; 590 struct ieee80211_scan_state *ss = sc->sc_ic.ic_scan; 591 struct iwm_scan_req_umac *req; 592 struct iwm_scan_req_umac_tail *tail; 593 size_t req_len; 594 uint8_t i, nssid; 595 int ret; 596 597 req_len = sizeof(struct iwm_scan_req_umac) + 598 (sizeof(struct iwm_scan_channel_cfg_umac) * 599 sc->ucode_capa.n_scan_channels) + 600 sizeof(struct iwm_scan_req_umac_tail); 601 if (req_len > IWM_MAX_CMD_PAYLOAD_SIZE) 602 return ENOMEM; 603 req = malloc(req_len, M_DEVBUF, M_NOWAIT | M_ZERO); 604 if (req == NULL) 605 return ENOMEM; 606 607 hcmd.len[0] = (uint16_t)req_len; 608 hcmd.data[0] = (void *)req; 609 610 IWM_DPRINTF(sc, IWM_DEBUG_SCAN, "Handling ieee80211 scan request\n"); 611 612 /* These timings correspond to iwlwifi's UNASSOC scan. */ 613 req->active_dwell = 10; 614 req->passive_dwell = 110; 615 req->fragmented_dwell = 44; 616 req->extended_dwell = 90; 617 req->max_out_time = 0; 618 req->suspend_time = 0; 619 620 req->scan_priority = htole32(IWM_SCAN_PRIORITY_HIGH); 621 req->ooc_priority = htole32(IWM_SCAN_PRIORITY_HIGH); 622 623 nssid = MIN(ss->ss_nssid, IWM_PROBE_OPTION_MAX); 624 req->n_channels = iwm_mvm_umac_scan_fill_channels(sc, 625 (struct iwm_scan_channel_cfg_umac *)req->data, nssid); 626 627 req->general_flags = htole32(IWM_UMAC_SCAN_GEN_FLAGS_PASS_ALL | 628 IWM_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE | 629 IWM_UMAC_SCAN_GEN_FLAGS_EXTENDED_DWELL); 630 631 tail = (void *)((char *)&req->data + 632 sizeof(struct iwm_scan_channel_cfg_umac) * 633 sc->ucode_capa.n_scan_channels); 634 635 /* Check if we're doing an active directed scan. */ 636 for (i = 0; i < nssid; i++) { 637 tail->direct_scan[i].id = IEEE80211_ELEMID_SSID; 638 tail->direct_scan[i].len = MIN(ss->ss_ssid[i].len, 639 IEEE80211_NWID_LEN); 640 memcpy(tail->direct_scan[i].ssid, ss->ss_ssid[i].ssid, 641 tail->direct_scan[i].len); 642 /* XXX debug */ 643 } 644 if (nssid != 0) { 645 req->general_flags |= 646 htole32(IWM_UMAC_SCAN_GEN_FLAGS_PRE_CONNECT); 647 } else 648 req->general_flags |= htole32(IWM_UMAC_SCAN_GEN_FLAGS_PASSIVE); 649 650 if (iwm_mvm_scan_use_ebs(sc)) 651 req->channel_flags = IWM_SCAN_CHANNEL_FLAG_EBS | 652 IWM_SCAN_CHANNEL_FLAG_EBS_ACCURATE | 653 IWM_SCAN_CHANNEL_FLAG_CACHE_ADD; 654 655 if (iwm_mvm_rrm_scan_needed(sc)) 656 req->general_flags |= 657 htole32(IWM_UMAC_SCAN_GEN_FLAGS_RRM_ENABLED); 658 659 ret = iwm_mvm_fill_probe_req(sc, &tail->preq); 660 if (ret) { 661 free(req, M_DEVBUF); 662 return ret; 663 } 664 665 /* Specify the scan plan: We'll do one iteration. */ 666 tail->schedule[0].interval = 0; 667 tail->schedule[0].iter_count = 1; 668 669 ret = iwm_send_cmd(sc, &hcmd); 670 if (!ret) 671 IWM_DPRINTF(sc, IWM_DEBUG_SCAN, 672 "Scan request was sent successfully\n"); 673 free(req, M_DEVBUF); 674 return ret; 675 } 676 677 int 678 iwm_mvm_lmac_scan(struct iwm_softc *sc) 679 { 680 struct iwm_host_cmd hcmd = { 681 .id = IWM_SCAN_OFFLOAD_REQUEST_CMD, 682 .len = { 0, }, 683 .data = { NULL, }, 684 .flags = IWM_CMD_SYNC, 685 }; 686 struct ieee80211_scan_state *ss = sc->sc_ic.ic_scan; 687 struct iwm_scan_req_lmac *req; 688 size_t req_len; 689 uint8_t i, nssid; 690 int ret; 691 692 IWM_DPRINTF(sc, IWM_DEBUG_SCAN, 693 "Handling ieee80211 scan request\n"); 694 695 req_len = sizeof(struct iwm_scan_req_lmac) + 696 (sizeof(struct iwm_scan_channel_cfg_lmac) * 697 sc->ucode_capa.n_scan_channels) + sizeof(struct iwm_scan_probe_req); 698 if (req_len > IWM_MAX_CMD_PAYLOAD_SIZE) 699 return ENOMEM; 700 req = malloc(req_len, M_DEVBUF, M_NOWAIT | M_ZERO); 701 if (req == NULL) 702 return ENOMEM; 703 704 hcmd.len[0] = (uint16_t)req_len; 705 hcmd.data[0] = (void *)req; 706 707 /* These timings correspond to iwlwifi's UNASSOC scan. */ 708 req->active_dwell = 10; 709 req->passive_dwell = 110; 710 req->fragmented_dwell = 44; 711 req->extended_dwell = 90; 712 req->max_out_time = 0; 713 req->suspend_time = 0; 714 715 req->scan_prio = htole32(IWM_SCAN_PRIORITY_HIGH); 716 req->rx_chain_select = iwm_mvm_scan_rx_chain(sc); 717 req->iter_num = htole32(1); 718 req->delay = 0; 719 720 req->scan_flags = htole32(IWM_MVM_LMAC_SCAN_FLAG_PASS_ALL | 721 IWM_MVM_LMAC_SCAN_FLAG_ITER_COMPLETE | 722 IWM_MVM_LMAC_SCAN_FLAG_EXTENDED_DWELL); 723 if (iwm_mvm_rrm_scan_needed(sc)) 724 req->scan_flags |= htole32(IWM_MVM_LMAC_SCAN_FLAGS_RRM_ENABLED); 725 726 req->flags = iwm_mvm_scan_rxon_flags(sc->sc_ic.ic_scan->ss_chans[0]); 727 728 req->filter_flags = 729 htole32(IWM_MAC_FILTER_ACCEPT_GRP | IWM_MAC_FILTER_IN_BEACON); 730 731 /* Tx flags 2 GHz. */ 732 req->tx_cmd[0].tx_flags = htole32(IWM_TX_CMD_FLG_SEQ_CTL | 733 IWM_TX_CMD_FLG_BT_DIS); 734 req->tx_cmd[0].rate_n_flags = 735 iwm_mvm_scan_rate_n_flags(sc, IEEE80211_CHAN_2GHZ, 1/*XXX*/); 736 req->tx_cmd[0].sta_id = sc->sc_aux_sta.sta_id; 737 738 /* Tx flags 5 GHz. */ 739 req->tx_cmd[1].tx_flags = htole32(IWM_TX_CMD_FLG_SEQ_CTL | 740 IWM_TX_CMD_FLG_BT_DIS); 741 req->tx_cmd[1].rate_n_flags = 742 iwm_mvm_scan_rate_n_flags(sc, IEEE80211_CHAN_5GHZ, 1/*XXX*/); 743 req->tx_cmd[1].sta_id = sc->sc_aux_sta.sta_id; 744 745 /* Check if we're doing an active directed scan. */ 746 nssid = MIN(ss->ss_nssid, IWM_PROBE_OPTION_MAX); 747 for (i = 0; i < nssid; i++) { 748 req->direct_scan[i].id = IEEE80211_ELEMID_SSID; 749 req->direct_scan[i].len = MIN(ss->ss_ssid[i].len, 750 IEEE80211_NWID_LEN); 751 memcpy(req->direct_scan[i].ssid, ss->ss_ssid[i].ssid, 752 req->direct_scan[i].len); 753 /* XXX debug */ 754 } 755 if (nssid != 0) { 756 req->scan_flags |= 757 htole32(IWM_MVM_LMAC_SCAN_FLAG_PRE_CONNECTION); 758 } else 759 req->scan_flags |= htole32(IWM_MVM_LMAC_SCAN_FLAG_PASSIVE); 760 761 req->n_channels = iwm_mvm_lmac_scan_fill_channels(sc, 762 (struct iwm_scan_channel_cfg_lmac *)req->data, nssid); 763 764 ret = iwm_mvm_fill_probe_req(sc, 765 (struct iwm_scan_probe_req *)(req->data + 766 (sizeof(struct iwm_scan_channel_cfg_lmac) * 767 sc->ucode_capa.n_scan_channels))); 768 if (ret) { 769 free(req, M_DEVBUF); 770 return ret; 771 } 772 773 /* Specify the scan plan: We'll do one iteration. */ 774 req->schedule[0].iterations = 1; 775 req->schedule[0].full_scan_mul = 1; 776 777 if (iwm_mvm_scan_use_ebs(sc)) { 778 req->channel_opt[0].flags = 779 htole16(IWM_SCAN_CHANNEL_FLAG_EBS | 780 IWM_SCAN_CHANNEL_FLAG_EBS_ACCURATE | 781 IWM_SCAN_CHANNEL_FLAG_CACHE_ADD); 782 req->channel_opt[0].non_ebs_ratio = 783 htole16(IWM_DENSE_EBS_SCAN_RATIO); 784 req->channel_opt[1].flags = 785 htole16(IWM_SCAN_CHANNEL_FLAG_EBS | 786 IWM_SCAN_CHANNEL_FLAG_EBS_ACCURATE | 787 IWM_SCAN_CHANNEL_FLAG_CACHE_ADD); 788 req->channel_opt[1].non_ebs_ratio = 789 htole16(IWM_SPARSE_EBS_SCAN_RATIO); 790 } 791 792 ret = iwm_send_cmd(sc, &hcmd); 793 if (!ret) { 794 IWM_DPRINTF(sc, IWM_DEBUG_SCAN, 795 "Scan request was sent successfully\n"); 796 } 797 free(req, M_DEVBUF); 798 return ret; 799 } 800 801 static int 802 iwm_mvm_lmac_scan_abort(struct iwm_softc *sc) 803 { 804 int ret; 805 struct iwm_host_cmd hcmd = { 806 .id = IWM_SCAN_OFFLOAD_ABORT_CMD, 807 .len = { 0, }, 808 .data = { NULL, }, 809 .flags = IWM_CMD_SYNC, 810 }; 811 uint32_t status; 812 813 ret = iwm_mvm_send_cmd_status(sc, &hcmd, &status); 814 if (ret) 815 return ret; 816 817 if (status != IWM_CAN_ABORT_STATUS) { 818 /* 819 * The scan abort will return 1 for success or 820 * 2 for "failure". A failure condition can be 821 * due to simply not being in an active scan which 822 * can occur if we send the scan abort before the 823 * microcode has notified us that a scan is completed. 824 */ 825 IWM_DPRINTF(sc, IWM_DEBUG_SCAN, 826 "SCAN OFFLOAD ABORT ret %d.\n", status); 827 ret = ENOENT; 828 } 829 830 return ret; 831 } 832 833 static int 834 iwm_mvm_umac_scan_abort(struct iwm_softc *sc) 835 { 836 struct iwm_umac_scan_abort cmd = {}; 837 int uid, ret; 838 839 uid = 0; 840 cmd.uid = htole32(uid); 841 842 IWM_DPRINTF(sc, IWM_DEBUG_SCAN, "Sending scan abort, uid %u\n", uid); 843 844 ret = iwm_mvm_send_cmd_pdu(sc, 845 iwm_cmd_id(IWM_SCAN_ABORT_UMAC, 846 IWM_ALWAYS_LONG_GROUP, 0), 847 0, sizeof(cmd), &cmd); 848 849 return ret; 850 } 851 852 int 853 iwm_mvm_scan_stop_wait(struct iwm_softc *sc) 854 { 855 struct iwm_notification_wait wait_scan_done; 856 static const uint16_t scan_done_notif[] = { IWM_SCAN_COMPLETE_UMAC, 857 IWM_SCAN_OFFLOAD_COMPLETE, }; 858 int ret; 859 860 iwm_init_notification_wait(sc->sc_notif_wait, &wait_scan_done, 861 scan_done_notif, nitems(scan_done_notif), 862 NULL, NULL); 863 864 IWM_DPRINTF(sc, IWM_DEBUG_SCAN, "Preparing to stop scan\n"); 865 866 if (fw_has_capa(&sc->ucode_capa, IWM_UCODE_TLV_CAPA_UMAC_SCAN)) 867 ret = iwm_mvm_umac_scan_abort(sc); 868 else 869 ret = iwm_mvm_lmac_scan_abort(sc); 870 871 if (ret) { 872 IWM_DPRINTF(sc, IWM_DEBUG_SCAN, "couldn't stop scan\n"); 873 iwm_remove_notification(sc->sc_notif_wait, &wait_scan_done); 874 return ret; 875 } 876 877 IWM_UNLOCK(sc); 878 ret = iwm_wait_notification(sc->sc_notif_wait, &wait_scan_done, hz); 879 IWM_LOCK(sc); 880 881 return ret; 882 } 883