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 #include "opt_wlan.h" 107 #include "opt_iwm.h" 108 109 #include <sys/param.h> 110 #include <sys/bus.h> 111 #include <sys/conf.h> 112 #include <sys/endian.h> 113 #include <sys/firmware.h> 114 #include <sys/kernel.h> 115 #include <sys/malloc.h> 116 #include <sys/mbuf.h> 117 #include <sys/mutex.h> 118 #include <sys/module.h> 119 #include <sys/proc.h> 120 #include <sys/rman.h> 121 #include <sys/socket.h> 122 #include <sys/sockio.h> 123 #include <sys/sysctl.h> 124 #include <sys/linker.h> 125 126 #include <machine/bus.h> 127 #include <machine/endian.h> 128 #include <machine/resource.h> 129 130 #include <dev/pci/pcivar.h> 131 #include <dev/pci/pcireg.h> 132 133 #include <net/bpf.h> 134 135 #include <net/if.h> 136 #include <net/if_var.h> 137 #include <net/if_arp.h> 138 #include <net/if_dl.h> 139 #include <net/if_media.h> 140 #include <net/if_types.h> 141 142 #include <netinet/in.h> 143 #include <netinet/in_systm.h> 144 #include <netinet/if_ether.h> 145 #include <netinet/ip.h> 146 147 #include <net80211/ieee80211_var.h> 148 #include <net80211/ieee80211_regdomain.h> 149 #include <net80211/ieee80211_ratectl.h> 150 #include <net80211/ieee80211_radiotap.h> 151 152 #include <dev/iwm/if_iwmreg.h> 153 #include <dev/iwm/if_iwmvar.h> 154 #include <dev/iwm/if_iwm_debug.h> 155 #include <dev/iwm/if_iwm_notif_wait.h> 156 #include <dev/iwm/if_iwm_util.h> 157 #include <dev/iwm/if_iwm_scan.h> 158 159 /* 160 * BEGIN mvm/scan.c 161 */ 162 163 #define IWM_DENSE_EBS_SCAN_RATIO 5 164 #define IWM_SPARSE_EBS_SCAN_RATIO 1 165 166 static uint16_t 167 iwm_scan_rx_chain(struct iwm_softc *sc) 168 { 169 uint16_t rx_chain; 170 uint8_t rx_ant; 171 172 rx_ant = iwm_get_valid_rx_ant(sc); 173 rx_chain = rx_ant << IWM_PHY_RX_CHAIN_VALID_POS; 174 rx_chain |= rx_ant << IWM_PHY_RX_CHAIN_FORCE_MIMO_SEL_POS; 175 rx_chain |= rx_ant << IWM_PHY_RX_CHAIN_FORCE_SEL_POS; 176 rx_chain |= 0x1 << IWM_PHY_RX_CHAIN_DRIVER_FORCE_POS; 177 return htole16(rx_chain); 178 } 179 180 static uint32_t 181 iwm_scan_rxon_flags(struct ieee80211_channel *c) 182 { 183 if (IEEE80211_IS_CHAN_2GHZ(c)) 184 return htole32(IWM_PHY_BAND_24); 185 else 186 return htole32(IWM_PHY_BAND_5); 187 } 188 189 static uint32_t 190 iwm_scan_rate_n_flags(struct iwm_softc *sc, int flags, int no_cck) 191 { 192 uint32_t tx_ant; 193 int i, ind; 194 195 for (i = 0, ind = sc->sc_scan_last_antenna; 196 i < IWM_RATE_MCS_ANT_NUM; i++) { 197 ind = (ind + 1) % IWM_RATE_MCS_ANT_NUM; 198 if (iwm_get_valid_tx_ant(sc) & (1 << ind)) { 199 sc->sc_scan_last_antenna = ind; 200 break; 201 } 202 } 203 tx_ant = (1 << sc->sc_scan_last_antenna) << IWM_RATE_MCS_ANT_POS; 204 205 if ((flags & IEEE80211_CHAN_2GHZ) && !no_cck) 206 return htole32(IWM_RATE_1M_PLCP | IWM_RATE_MCS_CCK_MSK | 207 tx_ant); 208 else 209 return htole32(IWM_RATE_6M_PLCP | tx_ant); 210 } 211 212 static inline boolean_t 213 iwm_rrm_scan_needed(struct iwm_softc *sc) 214 { 215 /* require rrm scan whenever the fw supports it */ 216 return iwm_fw_has_capa(sc, IWM_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT); 217 } 218 219 #ifdef IWM_DEBUG 220 static const char * 221 iwm_ebs_status_str(enum iwm_scan_ebs_status status) 222 { 223 switch (status) { 224 case IWM_SCAN_EBS_SUCCESS: 225 return "successful"; 226 case IWM_SCAN_EBS_INACTIVE: 227 return "inactive"; 228 case IWM_SCAN_EBS_FAILED: 229 case IWM_SCAN_EBS_CHAN_NOT_FOUND: 230 default: 231 return "failed"; 232 } 233 } 234 235 static const char * 236 iwm_offload_status_str(enum iwm_scan_offload_complete_status status) 237 { 238 return (status == IWM_SCAN_OFFLOAD_ABORTED) ? "aborted" : "completed"; 239 } 240 #endif 241 242 void 243 iwm_rx_lmac_scan_complete_notif(struct iwm_softc *sc, 244 struct iwm_rx_packet *pkt) 245 { 246 struct iwm_periodic_scan_complete *scan_notif = (void *)pkt->data; 247 248 /* If this happens, the firmware has mistakenly sent an LMAC 249 * notification during UMAC scans -- warn and ignore it. 250 */ 251 if (iwm_fw_has_capa(sc, IWM_UCODE_TLV_CAPA_UMAC_SCAN)) { 252 device_printf(sc->sc_dev, 253 "%s: Mistakenly got LMAC notification during UMAC scan\n", 254 __func__); 255 return; 256 } 257 258 IWM_DPRINTF(sc, IWM_DEBUG_SCAN, "Regular scan %s, EBS status %s (FW)\n", 259 iwm_offload_status_str(scan_notif->status), 260 iwm_ebs_status_str(scan_notif->ebs_status)); 261 262 sc->last_ebs_successful = 263 scan_notif->ebs_status == IWM_SCAN_EBS_SUCCESS || 264 scan_notif->ebs_status == IWM_SCAN_EBS_INACTIVE; 265 266 } 267 268 void 269 iwm_rx_umac_scan_complete_notif(struct iwm_softc *sc, 270 struct iwm_rx_packet *pkt) 271 { 272 struct iwm_umac_scan_complete *notif = (void *)pkt->data; 273 274 IWM_DPRINTF(sc, IWM_DEBUG_SCAN, 275 "Scan completed, uid %u, status %s, EBS status %s\n", 276 le32toh(notif->uid), 277 iwm_offload_status_str(notif->status), 278 iwm_ebs_status_str(notif->ebs_status)); 279 280 if (notif->ebs_status != IWM_SCAN_EBS_SUCCESS && 281 notif->ebs_status != IWM_SCAN_EBS_INACTIVE) 282 sc->last_ebs_successful = FALSE; 283 } 284 285 static int 286 iwm_scan_skip_channel(struct ieee80211_channel *c) 287 { 288 if (IEEE80211_IS_CHAN_2GHZ(c) && IEEE80211_IS_CHAN_B(c)) 289 return 0; 290 else if (IEEE80211_IS_CHAN_5GHZ(c) && IEEE80211_IS_CHAN_A(c)) 291 return 0; 292 else 293 return 1; 294 } 295 296 static uint8_t 297 iwm_lmac_scan_fill_channels(struct iwm_softc *sc, 298 struct iwm_scan_channel_cfg_lmac *chan, int n_ssids) 299 { 300 struct ieee80211com *ic = &sc->sc_ic; 301 struct ieee80211_scan_state *ss = ic->ic_scan; 302 struct ieee80211_channel *c; 303 uint8_t nchan; 304 int j; 305 306 for (nchan = j = 0; 307 j < ss->ss_last && nchan < sc->sc_fw.ucode_capa.n_scan_channels; 308 j++) { 309 c = ss->ss_chans[j]; 310 /* 311 * Catch other channels, in case we have 900MHz channels or 312 * something in the chanlist. 313 */ 314 if (!IEEE80211_IS_CHAN_2GHZ(c) && !IEEE80211_IS_CHAN_5GHZ(c)) { 315 IWM_DPRINTF(sc, IWM_DEBUG_RESET | IWM_DEBUG_EEPROM, 316 "%s: skipping channel (freq=%d, ieee=%d, flags=0x%08x)\n", 317 __func__, c->ic_freq, c->ic_ieee, c->ic_flags); 318 continue; 319 } 320 321 IWM_DPRINTF(sc, IWM_DEBUG_RESET | IWM_DEBUG_EEPROM, 322 "Adding channel %d (%d Mhz) to the list\n", 323 nchan, c->ic_freq); 324 chan->channel_num = htole16(ieee80211_mhz2ieee(c->ic_freq, 0)); 325 chan->iter_count = htole16(1); 326 chan->iter_interval = htole32(0); 327 chan->flags = htole32(IWM_UNIFIED_SCAN_CHANNEL_PARTIAL); 328 chan->flags |= htole32(IWM_SCAN_CHANNEL_NSSIDS(n_ssids)); 329 /* XXX IEEE80211_SCAN_NOBCAST flag is never set. */ 330 if (!IEEE80211_IS_CHAN_PASSIVE(c) && 331 (!(ss->ss_flags & IEEE80211_SCAN_NOBCAST) || n_ssids != 0)) 332 chan->flags |= htole32(IWM_SCAN_CHANNEL_TYPE_ACTIVE); 333 chan++; 334 nchan++; 335 } 336 337 return nchan; 338 } 339 340 static uint8_t 341 iwm_umac_scan_fill_channels(struct iwm_softc *sc, 342 struct iwm_scan_channel_cfg_umac *chan, int n_ssids) 343 { 344 struct ieee80211com *ic = &sc->sc_ic; 345 struct ieee80211_scan_state *ss = ic->ic_scan; 346 struct ieee80211_channel *c; 347 uint8_t nchan; 348 int j; 349 350 for (nchan = j = 0; 351 j < ss->ss_last && nchan < sc->sc_fw.ucode_capa.n_scan_channels; 352 j++) { 353 c = ss->ss_chans[j]; 354 /* 355 * Catch other channels, in case we have 900MHz channels or 356 * something in the chanlist. 357 */ 358 if (!IEEE80211_IS_CHAN_2GHZ(c) && !IEEE80211_IS_CHAN_5GHZ(c)) { 359 IWM_DPRINTF(sc, IWM_DEBUG_RESET | IWM_DEBUG_EEPROM, 360 "%s: skipping channel (freq=%d, ieee=%d, flags=0x%08x)\n", 361 __func__, c->ic_freq, c->ic_ieee, c->ic_flags); 362 continue; 363 } 364 365 IWM_DPRINTF(sc, IWM_DEBUG_RESET | IWM_DEBUG_EEPROM, 366 "Adding channel %d (%d Mhz) to the list\n", 367 nchan, c->ic_freq); 368 chan->channel_num = ieee80211_mhz2ieee(c->ic_freq, 0); 369 chan->iter_count = 1; 370 chan->iter_interval = htole16(0); 371 chan->flags = htole32(IWM_SCAN_CHANNEL_UMAC_NSSIDS(n_ssids)); 372 chan++; 373 nchan++; 374 } 375 376 return nchan; 377 } 378 379 static int 380 iwm_fill_probe_req(struct iwm_softc *sc, struct iwm_scan_probe_req_v1 *preq) 381 { 382 struct ieee80211com *ic = &sc->sc_ic; 383 struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps); 384 struct ieee80211_frame *wh = (struct ieee80211_frame *)preq->buf; 385 struct ieee80211_rateset *rs; 386 size_t remain = sizeof(preq->buf); 387 uint8_t *frm, *pos; 388 389 memset(preq, 0, sizeof(*preq)); 390 391 /* Ensure enough space for header and SSID IE. */ 392 if (remain < sizeof(*wh) + 2) 393 return ENOBUFS; 394 395 /* 396 * Build a probe request frame. Most of the following code is a 397 * copy & paste of what is done in net80211. 398 */ 399 wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_MGT | 400 IEEE80211_FC0_SUBTYPE_PROBE_REQ; 401 wh->i_fc[1] = IEEE80211_FC1_DIR_NODS; 402 IEEE80211_ADDR_COPY(wh->i_addr1, ieee80211broadcastaddr); 403 IEEE80211_ADDR_COPY(wh->i_addr2, vap ? vap->iv_myaddr : ic->ic_macaddr); 404 IEEE80211_ADDR_COPY(wh->i_addr3, ieee80211broadcastaddr); 405 *(uint16_t *)&wh->i_dur[0] = 0; /* filled by HW */ 406 *(uint16_t *)&wh->i_seq[0] = 0; /* filled by HW */ 407 408 frm = (uint8_t *)(wh + 1); 409 frm = ieee80211_add_ssid(frm, NULL, 0); 410 411 /* Tell the firmware where the MAC header is. */ 412 preq->mac_header.offset = 0; 413 preq->mac_header.len = htole16(frm - (uint8_t *)wh); 414 remain -= frm - (uint8_t *)wh; 415 416 /* Fill in 2GHz IEs and tell firmware where they are. */ 417 rs = &ic->ic_sup_rates[IEEE80211_MODE_11G]; 418 if (rs->rs_nrates > IEEE80211_RATE_SIZE) { 419 if (remain < 4 + rs->rs_nrates) 420 return ENOBUFS; 421 } else if (remain < 2 + rs->rs_nrates) { 422 return ENOBUFS; 423 } 424 preq->band_data[0].offset = htole16(frm - (uint8_t *)wh); 425 pos = frm; 426 frm = ieee80211_add_rates(frm, rs); 427 if (rs->rs_nrates > IEEE80211_RATE_SIZE) 428 frm = ieee80211_add_xrates(frm, rs); 429 preq->band_data[0].len = htole16(frm - pos); 430 remain -= frm - pos; 431 432 if (iwm_rrm_scan_needed(sc)) { 433 if (remain < 3) 434 return ENOBUFS; 435 *frm++ = IEEE80211_ELEMID_DSPARMS; 436 *frm++ = 1; 437 *frm++ = 0; 438 remain -= 3; 439 } 440 441 if (sc->nvm_data->sku_cap_band_52GHz_enable) { 442 /* Fill in 5GHz IEs. */ 443 rs = &ic->ic_sup_rates[IEEE80211_MODE_11A]; 444 if (rs->rs_nrates > IEEE80211_RATE_SIZE) { 445 if (remain < 4 + rs->rs_nrates) 446 return ENOBUFS; 447 } else if (remain < 2 + rs->rs_nrates) { 448 return ENOBUFS; 449 } 450 preq->band_data[1].offset = htole16(frm - (uint8_t *)wh); 451 pos = frm; 452 frm = ieee80211_add_rates(frm, rs); 453 if (rs->rs_nrates > IEEE80211_RATE_SIZE) 454 frm = ieee80211_add_xrates(frm, rs); 455 preq->band_data[1].len = htole16(frm - pos); 456 remain -= frm - pos; 457 } 458 459 /* Send 11n IEs on both 2GHz and 5GHz bands. */ 460 preq->common_data.offset = htole16(frm - (uint8_t *)wh); 461 pos = frm; 462 #if 0 463 if (ic->ic_flags & IEEE80211_F_HTON) { 464 if (remain < 28) 465 return ENOBUFS; 466 frm = ieee80211_add_htcaps(frm, ic); 467 /* XXX add WME info? */ 468 } 469 #endif 470 preq->common_data.len = htole16(frm - pos); 471 472 return 0; 473 } 474 475 int 476 iwm_config_umac_scan(struct iwm_softc *sc) 477 { 478 struct ieee80211com *ic = &sc->sc_ic; 479 struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps); 480 481 struct iwm_scan_config *scan_config; 482 int ret, j, nchan; 483 size_t cmd_size; 484 struct ieee80211_channel *c; 485 struct iwm_host_cmd hcmd = { 486 .id = iwm_cmd_id(IWM_SCAN_CFG_CMD, IWM_ALWAYS_LONG_GROUP, 0), 487 .flags = IWM_CMD_SYNC, 488 }; 489 static const uint32_t rates = (IWM_SCAN_CONFIG_RATE_1M | 490 IWM_SCAN_CONFIG_RATE_2M | IWM_SCAN_CONFIG_RATE_5M | 491 IWM_SCAN_CONFIG_RATE_11M | IWM_SCAN_CONFIG_RATE_6M | 492 IWM_SCAN_CONFIG_RATE_9M | IWM_SCAN_CONFIG_RATE_12M | 493 IWM_SCAN_CONFIG_RATE_18M | IWM_SCAN_CONFIG_RATE_24M | 494 IWM_SCAN_CONFIG_RATE_36M | IWM_SCAN_CONFIG_RATE_48M | 495 IWM_SCAN_CONFIG_RATE_54M); 496 497 cmd_size = sizeof(*scan_config) + sc->sc_fw.ucode_capa.n_scan_channels; 498 499 scan_config = malloc(cmd_size, M_DEVBUF, M_NOWAIT | M_ZERO); 500 if (scan_config == NULL) 501 return ENOMEM; 502 503 scan_config->tx_chains = htole32(iwm_get_valid_tx_ant(sc)); 504 scan_config->rx_chains = htole32(iwm_get_valid_rx_ant(sc)); 505 scan_config->legacy_rates = htole32(rates | 506 IWM_SCAN_CONFIG_SUPPORTED_RATE(rates)); 507 508 /* These timings correspond to iwlwifi's UNASSOC scan. */ 509 scan_config->dwell_active = 10; 510 scan_config->dwell_passive = 110; 511 scan_config->dwell_fragmented = 44; 512 scan_config->dwell_extended = 90; 513 scan_config->out_of_channel_time = htole32(0); 514 scan_config->suspend_time = htole32(0); 515 516 IEEE80211_ADDR_COPY(scan_config->mac_addr, 517 vap ? vap->iv_myaddr : ic->ic_macaddr); 518 519 scan_config->bcast_sta_id = sc->sc_aux_sta.sta_id; 520 scan_config->channel_flags = IWM_CHANNEL_FLAG_EBS | 521 IWM_CHANNEL_FLAG_ACCURATE_EBS | IWM_CHANNEL_FLAG_EBS_ADD | 522 IWM_CHANNEL_FLAG_PRE_SCAN_PASSIVE2ACTIVE; 523 524 for (nchan = j = 0; 525 j < ic->ic_nchans && nchan < sc->sc_fw.ucode_capa.n_scan_channels; 526 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_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_scan_use_ebs(struct iwm_softc *sc) 568 { 569 const struct iwm_ucode_capabilities *capa = &sc->sc_fw.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 static int 582 iwm_scan_size(struct iwm_softc *sc) 583 { 584 int base_size; 585 586 if (iwm_fw_has_capa(sc, IWM_UCODE_TLV_CAPA_UMAC_SCAN)) { 587 if (iwm_fw_has_api(sc, IWM_UCODE_TLV_API_ADAPTIVE_DWELL)) 588 base_size = IWM_SCAN_REQ_UMAC_SIZE_V7; 589 else 590 base_size = IWM_SCAN_REQ_UMAC_SIZE_V1; 591 592 return base_size + 593 sizeof(struct iwm_scan_channel_cfg_umac) * 594 sc->sc_fw.ucode_capa.n_scan_channels + 595 sizeof(struct iwm_scan_req_umac_tail_v1); 596 } else { 597 return sizeof(struct iwm_scan_req_lmac) + 598 sizeof(struct iwm_scan_channel_cfg_lmac) * 599 sc->sc_fw.ucode_capa.n_scan_channels + 600 sizeof(struct iwm_scan_probe_req_v1); 601 } 602 } 603 604 int 605 iwm_umac_scan(struct iwm_softc *sc) 606 { 607 struct iwm_host_cmd hcmd = { 608 .id = iwm_cmd_id(IWM_SCAN_REQ_UMAC, IWM_ALWAYS_LONG_GROUP, 0), 609 .len = { 0, }, 610 .data = { NULL, }, 611 .flags = IWM_CMD_SYNC, 612 }; 613 struct ieee80211_scan_state *ss = sc->sc_ic.ic_scan; 614 struct iwm_scan_req_umac *req; 615 struct iwm_scan_req_umac_tail_v1 *tail; 616 size_t req_len; 617 uint16_t general_flags; 618 uint8_t channel_flags, i, nssid; 619 int ret; 620 621 req_len = iwm_scan_size(sc); 622 if (req_len > IWM_MAX_CMD_PAYLOAD_SIZE) 623 return ENOMEM; 624 req = malloc(req_len, M_DEVBUF, M_NOWAIT | M_ZERO); 625 if (req == NULL) 626 return ENOMEM; 627 628 hcmd.len[0] = (uint16_t)req_len; 629 hcmd.data[0] = (void *)req; 630 631 IWM_DPRINTF(sc, IWM_DEBUG_SCAN, "Handling ieee80211 scan request\n"); 632 633 nssid = MIN(ss->ss_nssid, IWM_PROBE_OPTION_MAX); 634 635 general_flags = IWM_UMAC_SCAN_GEN_FLAGS_PASS_ALL | 636 IWM_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE; 637 if (!iwm_fw_has_api(sc, IWM_UCODE_TLV_API_ADAPTIVE_DWELL)) 638 general_flags |= IWM_UMAC_SCAN_GEN_FLAGS_EXTENDED_DWELL; 639 if (iwm_rrm_scan_needed(sc)) 640 general_flags |= IWM_UMAC_SCAN_GEN_FLAGS_RRM_ENABLED; 641 if (nssid != 0) 642 general_flags |= IWM_UMAC_SCAN_GEN_FLAGS_PRE_CONNECT; 643 else 644 general_flags |= IWM_UMAC_SCAN_GEN_FLAGS_PASSIVE; 645 646 channel_flags = 0; 647 if (iwm_scan_use_ebs(sc)) 648 channel_flags = IWM_SCAN_CHANNEL_FLAG_EBS | 649 IWM_SCAN_CHANNEL_FLAG_EBS_ACCURATE | 650 IWM_SCAN_CHANNEL_FLAG_CACHE_ADD; 651 652 req->general_flags = htole16(general_flags); 653 req->ooc_priority = htole32(IWM_SCAN_PRIORITY_HIGH); 654 655 /* These timings correspond to iwlwifi's UNASSOC scan. */ 656 if (iwm_fw_has_api(sc, IWM_UCODE_TLV_API_ADAPTIVE_DWELL)) { 657 req->v7.active_dwell = 10; 658 req->v7.passive_dwell = 110; 659 req->v7.fragmented_dwell = 44; 660 req->v7.adwell_default_n_aps_social = 10; 661 req->v7.adwell_default_n_aps = 2; 662 req->v7.adwell_max_budget = htole16(300); 663 req->v7.scan_priority = htole32(IWM_SCAN_PRIORITY_HIGH); 664 req->v7.channel.flags = channel_flags; 665 req->v7.channel.count = iwm_umac_scan_fill_channels(sc, 666 (struct iwm_scan_channel_cfg_umac *)req->v7.data, nssid); 667 668 tail = (void *)((char *)&req->v7.data + 669 sizeof(struct iwm_scan_channel_cfg_umac) * 670 sc->sc_fw.ucode_capa.n_scan_channels); 671 } else { 672 req->v1.active_dwell = 10; 673 req->v1.passive_dwell = 110; 674 req->v1.fragmented_dwell = 44; 675 req->v1.extended_dwell = 90; 676 req->v1.scan_priority = htole32(IWM_SCAN_PRIORITY_HIGH); 677 req->v1.channel.flags = channel_flags; 678 req->v1.channel.count = iwm_umac_scan_fill_channels(sc, 679 (struct iwm_scan_channel_cfg_umac *)req->v1.data, nssid); 680 681 tail = (void *)((char *)&req->v1.data + 682 sizeof(struct iwm_scan_channel_cfg_umac) * 683 sc->sc_fw.ucode_capa.n_scan_channels); 684 } 685 686 /* Check if we're doing an active directed scan. */ 687 for (i = 0; i < nssid; i++) { 688 tail->direct_scan[i].id = IEEE80211_ELEMID_SSID; 689 tail->direct_scan[i].len = MIN(ss->ss_ssid[i].len, 690 IEEE80211_NWID_LEN); 691 memcpy(tail->direct_scan[i].ssid, ss->ss_ssid[i].ssid, 692 tail->direct_scan[i].len); 693 /* XXX debug */ 694 } 695 696 ret = iwm_fill_probe_req(sc, &tail->preq); 697 if (ret) { 698 free(req, M_DEVBUF); 699 return ret; 700 } 701 702 /* Specify the scan plan: We'll do one iteration. */ 703 tail->schedule[0].interval = 0; 704 tail->schedule[0].iter_count = 1; 705 706 ret = iwm_send_cmd(sc, &hcmd); 707 if (!ret) 708 IWM_DPRINTF(sc, IWM_DEBUG_SCAN, 709 "Scan request was sent successfully\n"); 710 free(req, M_DEVBUF); 711 return ret; 712 } 713 714 int 715 iwm_lmac_scan(struct iwm_softc *sc) 716 { 717 struct iwm_host_cmd hcmd = { 718 .id = IWM_SCAN_OFFLOAD_REQUEST_CMD, 719 .len = { 0, }, 720 .data = { NULL, }, 721 .flags = IWM_CMD_SYNC, 722 }; 723 struct ieee80211_scan_state *ss = sc->sc_ic.ic_scan; 724 struct iwm_scan_req_lmac *req; 725 size_t req_len; 726 uint8_t i, nssid; 727 int ret; 728 729 IWM_DPRINTF(sc, IWM_DEBUG_SCAN, 730 "Handling ieee80211 scan request\n"); 731 732 req_len = iwm_scan_size(sc); 733 if (req_len > IWM_MAX_CMD_PAYLOAD_SIZE) 734 return ENOMEM; 735 req = malloc(req_len, M_DEVBUF, M_NOWAIT | M_ZERO); 736 if (req == NULL) 737 return ENOMEM; 738 739 hcmd.len[0] = (uint16_t)req_len; 740 hcmd.data[0] = (void *)req; 741 742 /* These timings correspond to iwlwifi's UNASSOC scan. */ 743 req->active_dwell = 10; 744 req->passive_dwell = 110; 745 req->fragmented_dwell = 44; 746 req->extended_dwell = 90; 747 req->max_out_time = 0; 748 req->suspend_time = 0; 749 750 req->scan_prio = htole32(IWM_SCAN_PRIORITY_HIGH); 751 req->rx_chain_select = iwm_scan_rx_chain(sc); 752 req->iter_num = htole32(1); 753 req->delay = 0; 754 755 req->scan_flags = htole32(IWM_LMAC_SCAN_FLAG_PASS_ALL | 756 IWM_LMAC_SCAN_FLAG_ITER_COMPLETE | 757 IWM_LMAC_SCAN_FLAG_EXTENDED_DWELL); 758 if (iwm_rrm_scan_needed(sc)) 759 req->scan_flags |= htole32(IWM_LMAC_SCAN_FLAGS_RRM_ENABLED); 760 761 req->flags = iwm_scan_rxon_flags(sc->sc_ic.ic_scan->ss_chans[0]); 762 763 req->filter_flags = 764 htole32(IWM_MAC_FILTER_ACCEPT_GRP | IWM_MAC_FILTER_IN_BEACON); 765 766 /* Tx flags 2 GHz. */ 767 req->tx_cmd[0].tx_flags = htole32(IWM_TX_CMD_FLG_SEQ_CTL | 768 IWM_TX_CMD_FLG_BT_DIS); 769 req->tx_cmd[0].rate_n_flags = 770 iwm_scan_rate_n_flags(sc, IEEE80211_CHAN_2GHZ, 1/*XXX*/); 771 req->tx_cmd[0].sta_id = sc->sc_aux_sta.sta_id; 772 773 /* Tx flags 5 GHz. */ 774 req->tx_cmd[1].tx_flags = htole32(IWM_TX_CMD_FLG_SEQ_CTL | 775 IWM_TX_CMD_FLG_BT_DIS); 776 req->tx_cmd[1].rate_n_flags = 777 iwm_scan_rate_n_flags(sc, IEEE80211_CHAN_5GHZ, 1/*XXX*/); 778 req->tx_cmd[1].sta_id = sc->sc_aux_sta.sta_id; 779 780 /* Check if we're doing an active directed scan. */ 781 nssid = MIN(ss->ss_nssid, IWM_PROBE_OPTION_MAX); 782 for (i = 0; i < nssid; i++) { 783 req->direct_scan[i].id = IEEE80211_ELEMID_SSID; 784 req->direct_scan[i].len = MIN(ss->ss_ssid[i].len, 785 IEEE80211_NWID_LEN); 786 memcpy(req->direct_scan[i].ssid, ss->ss_ssid[i].ssid, 787 req->direct_scan[i].len); 788 /* XXX debug */ 789 } 790 if (nssid != 0) { 791 req->scan_flags |= 792 htole32(IWM_LMAC_SCAN_FLAG_PRE_CONNECTION); 793 } else 794 req->scan_flags |= htole32(IWM_LMAC_SCAN_FLAG_PASSIVE); 795 796 req->n_channels = iwm_lmac_scan_fill_channels(sc, 797 (struct iwm_scan_channel_cfg_lmac *)req->data, nssid); 798 799 ret = iwm_fill_probe_req(sc, 800 (struct iwm_scan_probe_req_v1 *)(req->data + 801 (sizeof(struct iwm_scan_channel_cfg_lmac) * 802 sc->sc_fw.ucode_capa.n_scan_channels))); 803 if (ret) { 804 free(req, M_DEVBUF); 805 return ret; 806 } 807 808 /* Specify the scan plan: We'll do one iteration. */ 809 req->schedule[0].iterations = 1; 810 req->schedule[0].full_scan_mul = 1; 811 812 if (iwm_scan_use_ebs(sc)) { 813 req->channel_opt[0].flags = 814 htole16(IWM_SCAN_CHANNEL_FLAG_EBS | 815 IWM_SCAN_CHANNEL_FLAG_EBS_ACCURATE | 816 IWM_SCAN_CHANNEL_FLAG_CACHE_ADD); 817 req->channel_opt[0].non_ebs_ratio = 818 htole16(IWM_DENSE_EBS_SCAN_RATIO); 819 req->channel_opt[1].flags = 820 htole16(IWM_SCAN_CHANNEL_FLAG_EBS | 821 IWM_SCAN_CHANNEL_FLAG_EBS_ACCURATE | 822 IWM_SCAN_CHANNEL_FLAG_CACHE_ADD); 823 req->channel_opt[1].non_ebs_ratio = 824 htole16(IWM_SPARSE_EBS_SCAN_RATIO); 825 } 826 827 ret = iwm_send_cmd(sc, &hcmd); 828 if (!ret) { 829 IWM_DPRINTF(sc, IWM_DEBUG_SCAN, 830 "Scan request was sent successfully\n"); 831 } 832 free(req, M_DEVBUF); 833 return ret; 834 } 835 836 static int 837 iwm_lmac_scan_abort(struct iwm_softc *sc) 838 { 839 int ret; 840 struct iwm_host_cmd hcmd = { 841 .id = IWM_SCAN_OFFLOAD_ABORT_CMD, 842 .len = { 0, }, 843 .data = { NULL, }, 844 .flags = IWM_CMD_SYNC, 845 }; 846 uint32_t status; 847 848 ret = iwm_send_cmd_status(sc, &hcmd, &status); 849 if (ret) 850 return ret; 851 852 if (status != IWM_CAN_ABORT_STATUS) { 853 /* 854 * The scan abort will return 1 for success or 855 * 2 for "failure". A failure condition can be 856 * due to simply not being in an active scan which 857 * can occur if we send the scan abort before the 858 * microcode has notified us that a scan is completed. 859 */ 860 IWM_DPRINTF(sc, IWM_DEBUG_SCAN, 861 "SCAN OFFLOAD ABORT ret %d.\n", status); 862 ret = ENOENT; 863 } 864 865 return ret; 866 } 867 868 static int 869 iwm_umac_scan_abort(struct iwm_softc *sc) 870 { 871 struct iwm_umac_scan_abort cmd = {}; 872 int uid, ret; 873 874 uid = 0; 875 cmd.uid = htole32(uid); 876 877 IWM_DPRINTF(sc, IWM_DEBUG_SCAN, "Sending scan abort, uid %u\n", uid); 878 879 ret = iwm_send_cmd_pdu(sc, 880 iwm_cmd_id(IWM_SCAN_ABORT_UMAC, 881 IWM_ALWAYS_LONG_GROUP, 0), 882 0, sizeof(cmd), &cmd); 883 884 return ret; 885 } 886 887 int 888 iwm_scan_stop_wait(struct iwm_softc *sc) 889 { 890 struct iwm_notification_wait wait_scan_done; 891 static const uint16_t scan_done_notif[] = { IWM_SCAN_COMPLETE_UMAC, 892 IWM_SCAN_OFFLOAD_COMPLETE, }; 893 int ret; 894 895 iwm_init_notification_wait(sc->sc_notif_wait, &wait_scan_done, 896 scan_done_notif, nitems(scan_done_notif), 897 NULL, NULL); 898 899 IWM_DPRINTF(sc, IWM_DEBUG_SCAN, "Preparing to stop scan\n"); 900 901 if (iwm_fw_has_capa(sc, IWM_UCODE_TLV_CAPA_UMAC_SCAN)) 902 ret = iwm_umac_scan_abort(sc); 903 else 904 ret = iwm_lmac_scan_abort(sc); 905 906 if (ret) { 907 IWM_DPRINTF(sc, IWM_DEBUG_SCAN, "couldn't stop scan\n"); 908 iwm_remove_notification(sc->sc_notif_wait, &wait_scan_done); 909 return ret; 910 } 911 912 IWM_UNLOCK(sc); 913 ret = iwm_wait_notification(sc->sc_notif_wait, &wait_scan_done, hz); 914 IWM_LOCK(sc); 915 916 return ret; 917 } 918