sys/dev/iwm/if_iwm_scan.c

   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->sc_fw.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->sc_fw.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->sc_fw.ucode_capa.n_scan_channels;
 311             j++) {
 312                 c = ss->ss_chans[j];
 313                 /*
 314                  * Catch other channels, in case we have 900MHz channels or
 315                  * something in the chanlist.
 316                  */
 317                 if (!IEEE80211_IS_CHAN_2GHZ(c) && !IEEE80211_IS_CHAN_5GHZ(c)) {
 318                         IWM_DPRINTF(sc, IWM_DEBUG_RESET | IWM_DEBUG_EEPROM,
 319                             "%s: skipping channel (freq=%d, ieee=%d, flags=0x%08x)\n",
 320                             __func__, c->ic_freq, c->ic_ieee, c->ic_flags);
 321                         continue;
 322                 }
 323
 324                 IWM_DPRINTF(sc, IWM_DEBUG_RESET | IWM_DEBUG_EEPROM,
 325                     "Adding channel %d (%d Mhz) to the list\n",
 326                     nchan, c->ic_freq);
 327                 chan->channel_num = htole16(ieee80211_mhz2ieee(c->ic_freq, 0));
 328                 chan->iter_count = htole16(1);
 329                 chan->iter_interval = htole32(0);
 330                 chan->flags = htole32(IWM_UNIFIED_SCAN_CHANNEL_PARTIAL);
 331                 chan->flags |= htole32(IWM_SCAN_CHANNEL_NSSIDS(n_ssids));
 332                 /* XXX IEEE80211_SCAN_NOBCAST flag is never set. */
 333                 if (!IEEE80211_IS_CHAN_PASSIVE(c) &&
 334                     (!(ss->ss_flags & IEEE80211_SCAN_NOBCAST) || n_ssids != 0))
 335                         chan->flags |= htole32(IWM_SCAN_CHANNEL_TYPE_ACTIVE);
 336                 chan++;
 337                 nchan++;
 338         }
 339
 340         return nchan;
 341 }
 342
 343 static uint8_t
 344 iwm_mvm_umac_scan_fill_channels(struct iwm_softc *sc,
 345     struct iwm_scan_channel_cfg_umac *chan, int n_ssids)
 346 {
 347         struct ieee80211com *ic = &sc->sc_ic;
 348         struct ieee80211_scan_state *ss = ic->ic_scan;
 349         struct ieee80211_channel *c;
 350         uint8_t nchan;
 351         int j;
 352
 353         for (nchan = j = 0;
 354             j < ss->ss_last && nchan < sc->sc_fw.ucode_capa.n_scan_channels;
 355             j++) {
 356                 c = ss->ss_chans[j];
 357                 /*
 358                  * Catch other channels, in case we have 900MHz channels or
 359                  * something in the chanlist.
 360                  */
 361                 if (!IEEE80211_IS_CHAN_2GHZ(c) && !IEEE80211_IS_CHAN_5GHZ(c)) {
 362                         IWM_DPRINTF(sc, IWM_DEBUG_RESET | IWM_DEBUG_EEPROM,
 363                             "%s: skipping channel (freq=%d, ieee=%d, flags=0x%08x)\n",
 364                             __func__, c->ic_freq, c->ic_ieee, c->ic_flags);
 365                         continue;
 366                 }
 367
 368                 IWM_DPRINTF(sc, IWM_DEBUG_RESET | IWM_DEBUG_EEPROM,
 369                     "Adding channel %d (%d Mhz) to the list\n",
 370                     nchan, c->ic_freq);
 371                 chan->channel_num = ieee80211_mhz2ieee(c->ic_freq, 0);
 372                 chan->iter_count = 1;
 373                 chan->iter_interval = htole16(0);
 374                 chan->flags = htole32(IWM_SCAN_CHANNEL_UMAC_NSSIDS(n_ssids));
 375                 chan++;
 376                 nchan++;
 377         }
 378
 379         return nchan;
 380 }
 381
 382 static int
 383 iwm_mvm_fill_probe_req(struct iwm_softc *sc, struct iwm_scan_probe_req *preq)
 384 {
 385         struct ieee80211com *ic = &sc->sc_ic;
 386         struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps);
 387         struct ieee80211_frame *wh = (struct ieee80211_frame *)preq->buf;
 388         struct ieee80211_rateset *rs;
 389         size_t remain = sizeof(preq->buf);
 390         uint8_t *frm, *pos;
 391
 392         memset(preq, 0, sizeof(*preq));
 393
 394         /* Ensure enough space for header and SSID IE. */
 395         if (remain < sizeof(*wh) + 2)
 396                 return ENOBUFS;
 397
 398         /*
 399          * Build a probe request frame.  Most of the following code is a
 400          * copy & paste of what is done in net80211.
 401          */
 402         wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_MGT |
 403             IEEE80211_FC0_SUBTYPE_PROBE_REQ;
 404         wh->i_fc[1] = IEEE80211_FC1_DIR_NODS;
 405         IEEE80211_ADDR_COPY(wh->i_addr1, ieee80211broadcastaddr);
 406         IEEE80211_ADDR_COPY(wh->i_addr2, vap ? vap->iv_myaddr : ic->ic_macaddr);
 407         IEEE80211_ADDR_COPY(wh->i_addr3, ieee80211broadcastaddr);
 408         *(uint16_t *)&wh->i_dur[0] = 0; /* filled by HW */
 409         *(uint16_t *)&wh->i_seq[0] = 0; /* filled by HW */
 410
 411         frm = (uint8_t *)(wh + 1);
 412         frm = ieee80211_add_ssid(frm, NULL, 0);
 413
 414         /* Tell the firmware where the MAC header is. */
 415         preq->mac_header.offset = 0;
 416         preq->mac_header.len = htole16(frm - (uint8_t *)wh);
 417         remain -= frm - (uint8_t *)wh;
 418
 419         /* Fill in 2GHz IEs and tell firmware where they are. */
 420         rs = &ic->ic_sup_rates[IEEE80211_MODE_11G];
 421         if (rs->rs_nrates > IEEE80211_RATE_SIZE) {
 422                 if (remain < 4 + rs->rs_nrates)
 423                         return ENOBUFS;
 424         } else if (remain < 2 + rs->rs_nrates) {
 425                 return ENOBUFS;
 426         }
 427         preq->band_data[0].offset = htole16(frm - (uint8_t *)wh);
 428         pos = frm;
 429         frm = ieee80211_add_rates(frm, rs);
 430         if (rs->rs_nrates > IEEE80211_RATE_SIZE)
 431                 frm = ieee80211_add_xrates(frm, rs);
 432         preq->band_data[0].len = htole16(frm - pos);
 433         remain -= frm - pos;
 434
 435         if (iwm_mvm_rrm_scan_needed(sc)) {
 436                 if (remain < 3)
 437                         return ENOBUFS;
 438                 *frm++ = IEEE80211_ELEMID_DSPARMS;
 439                 *frm++ = 1;
 440                 *frm++ = 0;
 441                 remain -= 3;
 442         }
 443
 444         if (sc->nvm_data->sku_cap_band_52GHz_enable) {
 445                 /* Fill in 5GHz IEs. */
 446                 rs = &ic->ic_sup_rates[IEEE80211_MODE_11A];
 447                 if (rs->rs_nrates > IEEE80211_RATE_SIZE) {
 448                         if (remain < 4 + rs->rs_nrates)
 449                                 return ENOBUFS;
 450                 } else if (remain < 2 + rs->rs_nrates) {
 451                         return ENOBUFS;
 452                 }
 453                 preq->band_data[1].offset = htole16(frm - (uint8_t *)wh);
 454                 pos = frm;
 455                 frm = ieee80211_add_rates(frm, rs);
 456                 if (rs->rs_nrates > IEEE80211_RATE_SIZE)
 457                         frm = ieee80211_add_xrates(frm, rs);
 458                 preq->band_data[1].len = htole16(frm - pos);
 459                 remain -= frm - pos;
 460         }
 461
 462         /* Send 11n IEs on both 2GHz and 5GHz bands. */
 463         preq->common_data.offset = htole16(frm - (uint8_t *)wh);
 464         pos = frm;
 465 #if 0
 466         if (ic->ic_flags & IEEE80211_F_HTON) {
 467                 if (remain < 28)
 468                         return ENOBUFS;
 469                 frm = ieee80211_add_htcaps(frm, ic);
 470                 /* XXX add WME info? */
 471         }
 472 #endif
 473         preq->common_data.len = htole16(frm - pos);
 474
 475         return 0;
 476 }
 477
 478 int
 479 iwm_mvm_config_umac_scan(struct iwm_softc *sc)
 480 {
 481         struct ieee80211com *ic = &sc->sc_ic;
 482         struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps);
 483
 484         struct iwm_scan_config *scan_config;
 485         int ret, j, nchan;
 486         size_t cmd_size;
 487         struct ieee80211_channel *c;
 488         struct iwm_host_cmd hcmd = {
 489                 .id = iwm_cmd_id(IWM_SCAN_CFG_CMD, IWM_ALWAYS_LONG_GROUP, 0),
 490                 .flags = IWM_CMD_SYNC,
 491         };
 492         static const uint32_t rates = (IWM_SCAN_CONFIG_RATE_1M |
 493             IWM_SCAN_CONFIG_RATE_2M | IWM_SCAN_CONFIG_RATE_5M |
 494             IWM_SCAN_CONFIG_RATE_11M | IWM_SCAN_CONFIG_RATE_6M |
 495             IWM_SCAN_CONFIG_RATE_9M | IWM_SCAN_CONFIG_RATE_12M |
 496             IWM_SCAN_CONFIG_RATE_18M | IWM_SCAN_CONFIG_RATE_24M |
 497             IWM_SCAN_CONFIG_RATE_36M | IWM_SCAN_CONFIG_RATE_48M |
 498             IWM_SCAN_CONFIG_RATE_54M);
 499
 500         cmd_size = sizeof(*scan_config) + sc->sc_fw.ucode_capa.n_scan_channels;
 501
 502         scan_config = malloc(cmd_size, M_DEVBUF, M_NOWAIT | M_ZERO);
 503         if (scan_config == NULL)
 504                 return ENOMEM;
 505
 506         scan_config->tx_chains = htole32(iwm_mvm_get_valid_tx_ant(sc));
 507         scan_config->rx_chains = htole32(iwm_mvm_get_valid_rx_ant(sc));
 508         scan_config->legacy_rates = htole32(rates |
 509             IWM_SCAN_CONFIG_SUPPORTED_RATE(rates));
 510
 511         /* These timings correspond to iwlwifi's UNASSOC scan. */
 512         scan_config->dwell_active = 10;
 513         scan_config->dwell_passive = 110;
 514         scan_config->dwell_fragmented = 44;
 515         scan_config->dwell_extended = 90;
 516         scan_config->out_of_channel_time = htole32(0);
 517         scan_config->suspend_time = htole32(0);
 518
 519         IEEE80211_ADDR_COPY(scan_config->mac_addr,
 520             vap ? vap->iv_myaddr : ic->ic_macaddr);
 521
 522         scan_config->bcast_sta_id = sc->sc_aux_sta.sta_id;
 523         scan_config->channel_flags = IWM_CHANNEL_FLAG_EBS |
 524             IWM_CHANNEL_FLAG_ACCURATE_EBS | IWM_CHANNEL_FLAG_EBS_ADD |
 525             IWM_CHANNEL_FLAG_PRE_SCAN_PASSIVE2ACTIVE;
 526
 527         for (nchan = j = 0;
 528             j < ic->ic_nchans && nchan < sc->sc_fw.ucode_capa.n_scan_channels;
 529             j++) {
 530                 c = &ic->ic_channels[j];
 531                 /* For 2GHz, only populate 11b channels */
 532                 /* For 5GHz, only populate 11a channels */
 533                 /*
 534                  * Catch other channels, in case we have 900MHz channels or
 535                  * something in the chanlist.
 536                  */
 537                 if (iwm_mvm_scan_skip_channel(c))
 538                         continue;
 539                 scan_config->channel_array[nchan++] =
 540                     ieee80211_mhz2ieee(c->ic_freq, 0);
 541         }
 542
 543         scan_config->flags = htole32(IWM_SCAN_CONFIG_FLAG_ACTIVATE |
 544             IWM_SCAN_CONFIG_FLAG_ALLOW_CHUB_REQS |
 545             IWM_SCAN_CONFIG_FLAG_SET_TX_CHAINS |
 546             IWM_SCAN_CONFIG_FLAG_SET_RX_CHAINS |
 547             IWM_SCAN_CONFIG_FLAG_SET_AUX_STA_ID |
 548             IWM_SCAN_CONFIG_FLAG_SET_ALL_TIMES |
 549             IWM_SCAN_CONFIG_FLAG_SET_LEGACY_RATES |
 550             IWM_SCAN_CONFIG_FLAG_SET_MAC_ADDR |
 551             IWM_SCAN_CONFIG_FLAG_SET_CHANNEL_FLAGS|
 552             IWM_SCAN_CONFIG_N_CHANNELS(nchan) |
 553             IWM_SCAN_CONFIG_FLAG_CLEAR_FRAGMENTED);
 554
 555         hcmd.data[0] = scan_config;
 556         hcmd.len[0] = cmd_size;
 557
 558         IWM_DPRINTF(sc, IWM_DEBUG_SCAN, "Sending UMAC scan config\n");
 559
 560         ret = iwm_send_cmd(sc, &hcmd);
 561         if (!ret)
 562                 IWM_DPRINTF(sc, IWM_DEBUG_SCAN,
 563                     "UMAC scan config was sent successfully\n");
 564
 565         free(scan_config, M_DEVBUF);
 566         return ret;
 567 }
 568
 569 static boolean_t
 570 iwm_mvm_scan_use_ebs(struct iwm_softc *sc)
 571 {
 572         const struct iwm_ucode_capabilities *capa = &sc->sc_fw.ucode_capa;
 573
 574         /* We can only use EBS if:
 575          *      1. the feature is supported;
 576          *      2. the last EBS was successful;
 577          *      3. if only single scan, the single scan EBS API is supported;
 578          *      4. it's not a p2p find operation.
 579          */
 580         return ((capa->flags & IWM_UCODE_TLV_FLAGS_EBS_SUPPORT) &&
 581                 sc->last_ebs_successful);
 582 }
 583
 584 int
 585 iwm_mvm_umac_scan(struct iwm_softc *sc)
 586 {
 587         struct iwm_host_cmd hcmd = {
 588                 .id = iwm_cmd_id(IWM_SCAN_REQ_UMAC, IWM_ALWAYS_LONG_GROUP, 0),
 589                 .len = { 0, },
 590                 .data = { NULL, },
 591                 .flags = IWM_CMD_SYNC,
 592         };
 593         struct ieee80211_scan_state *ss = sc->sc_ic.ic_scan;
 594         struct iwm_scan_req_umac *req;
 595         struct iwm_scan_req_umac_tail *tail;
 596         size_t req_len;
 597         uint8_t i, nssid;
 598         int ret;
 599
 600         req_len = sizeof(struct iwm_scan_req_umac) +
 601             (sizeof(struct iwm_scan_channel_cfg_umac) *
 602             sc->sc_fw.ucode_capa.n_scan_channels) +
 603             sizeof(struct iwm_scan_req_umac_tail);
 604         if (req_len > IWM_MAX_CMD_PAYLOAD_SIZE)
 605                 return ENOMEM;
 606         req = malloc(req_len, M_DEVBUF, M_NOWAIT | M_ZERO);
 607         if (req == NULL)
 608                 return ENOMEM;
 609
 610         hcmd.len[0] = (uint16_t)req_len;
 611         hcmd.data[0] = (void *)req;
 612
 613         IWM_DPRINTF(sc, IWM_DEBUG_SCAN, "Handling ieee80211 scan request\n");
 614
 615         /* These timings correspond to iwlwifi's UNASSOC scan. */
 616         req->active_dwell = 10;
 617         req->passive_dwell = 110;
 618         req->fragmented_dwell = 44;
 619         req->extended_dwell = 90;
 620         req->max_out_time = 0;
 621         req->suspend_time = 0;
 622
 623         req->scan_priority = htole32(IWM_SCAN_PRIORITY_HIGH);
 624         req->ooc_priority = htole32(IWM_SCAN_PRIORITY_HIGH);
 625
 626         nssid = MIN(ss->ss_nssid, IWM_PROBE_OPTION_MAX);
 627         req->n_channels = iwm_mvm_umac_scan_fill_channels(sc,
 628             (struct iwm_scan_channel_cfg_umac *)req->data, nssid);
 629
 630         req->general_flags = htole32(IWM_UMAC_SCAN_GEN_FLAGS_PASS_ALL |
 631             IWM_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE |
 632             IWM_UMAC_SCAN_GEN_FLAGS_EXTENDED_DWELL);
 633
 634         tail = (void *)((char *)&req->data +
 635                 sizeof(struct iwm_scan_channel_cfg_umac) *
 636                         sc->sc_fw.ucode_capa.n_scan_channels);
 637
 638         /* Check if we're doing an active directed scan. */
 639         for (i = 0; i < nssid; i++) {
 640                 tail->direct_scan[i].id = IEEE80211_ELEMID_SSID;
 641                 tail->direct_scan[i].len = MIN(ss->ss_ssid[i].len,
 642                     IEEE80211_NWID_LEN);
 643                 memcpy(tail->direct_scan[i].ssid, ss->ss_ssid[i].ssid,
 644                     tail->direct_scan[i].len);
 645                 /* XXX debug */
 646         }
 647         if (nssid != 0) {
 648                 req->general_flags |=
 649                     htole32(IWM_UMAC_SCAN_GEN_FLAGS_PRE_CONNECT);
 650         } else
 651                 req->general_flags |= htole32(IWM_UMAC_SCAN_GEN_FLAGS_PASSIVE);
 652
 653         if (iwm_mvm_scan_use_ebs(sc))
 654                 req->channel_flags = IWM_SCAN_CHANNEL_FLAG_EBS |
 655                                      IWM_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
 656                                      IWM_SCAN_CHANNEL_FLAG_CACHE_ADD;
 657
 658         if (iwm_mvm_rrm_scan_needed(sc))
 659                 req->general_flags |=
 660                     htole32(IWM_UMAC_SCAN_GEN_FLAGS_RRM_ENABLED);
 661
 662         ret = iwm_mvm_fill_probe_req(sc, &tail->preq);
 663         if (ret) {
 664                 free(req, M_DEVBUF);
 665                 return ret;
 666         }
 667
 668         /* Specify the scan plan: We'll do one iteration. */
 669         tail->schedule[0].interval = 0;
 670         tail->schedule[0].iter_count = 1;
 671
 672         ret = iwm_send_cmd(sc, &hcmd);
 673         if (!ret)
 674                 IWM_DPRINTF(sc, IWM_DEBUG_SCAN,
 675                     "Scan request was sent successfully\n");
 676         free(req, M_DEVBUF);
 677         return ret;
 678 }
 679
 680 int
 681 iwm_mvm_lmac_scan(struct iwm_softc *sc)
 682 {
 683         struct iwm_host_cmd hcmd = {
 684                 .id = IWM_SCAN_OFFLOAD_REQUEST_CMD,
 685                 .len = { 0, },
 686                 .data = { NULL, },
 687                 .flags = IWM_CMD_SYNC,
 688         };
 689         struct ieee80211_scan_state *ss = sc->sc_ic.ic_scan;
 690         struct iwm_scan_req_lmac *req;
 691         size_t req_len;
 692         uint8_t i, nssid;
 693         int ret;
 694
 695         IWM_DPRINTF(sc, IWM_DEBUG_SCAN,
 696             "Handling ieee80211 scan request\n");
 697
 698         req_len = sizeof(struct iwm_scan_req_lmac) +
 699             (sizeof(struct iwm_scan_channel_cfg_lmac) *
 700             sc->sc_fw.ucode_capa.n_scan_channels) + sizeof(struct iwm_scan_probe_req);
 701         if (req_len > IWM_MAX_CMD_PAYLOAD_SIZE)
 702                 return ENOMEM;
 703         req = malloc(req_len, M_DEVBUF, M_NOWAIT | M_ZERO);
 704         if (req == NULL)
 705                 return ENOMEM;
 706
 707         hcmd.len[0] = (uint16_t)req_len;
 708         hcmd.data[0] = (void *)req;
 709
 710         /* These timings correspond to iwlwifi's UNASSOC scan. */
 711         req->active_dwell = 10;
 712         req->passive_dwell = 110;
 713         req->fragmented_dwell = 44;
 714         req->extended_dwell = 90;
 715         req->max_out_time = 0;
 716         req->suspend_time = 0;
 717
 718         req->scan_prio = htole32(IWM_SCAN_PRIORITY_HIGH);
 719         req->rx_chain_select = iwm_mvm_scan_rx_chain(sc);
 720         req->iter_num = htole32(1);
 721         req->delay = 0;
 722
 723         req->scan_flags = htole32(IWM_MVM_LMAC_SCAN_FLAG_PASS_ALL |
 724             IWM_MVM_LMAC_SCAN_FLAG_ITER_COMPLETE |
 725             IWM_MVM_LMAC_SCAN_FLAG_EXTENDED_DWELL);
 726         if (iwm_mvm_rrm_scan_needed(sc))
 727                 req->scan_flags |= htole32(IWM_MVM_LMAC_SCAN_FLAGS_RRM_ENABLED);
 728
 729         req->flags = iwm_mvm_scan_rxon_flags(sc->sc_ic.ic_scan->ss_chans[0]);
 730
 731         req->filter_flags =
 732             htole32(IWM_MAC_FILTER_ACCEPT_GRP | IWM_MAC_FILTER_IN_BEACON);
 733
 734         /* Tx flags 2 GHz. */
 735         req->tx_cmd[0].tx_flags = htole32(IWM_TX_CMD_FLG_SEQ_CTL |
 736             IWM_TX_CMD_FLG_BT_DIS);
 737         req->tx_cmd[0].rate_n_flags =
 738             iwm_mvm_scan_rate_n_flags(sc, IEEE80211_CHAN_2GHZ, 1/*XXX*/);
 739         req->tx_cmd[0].sta_id = sc->sc_aux_sta.sta_id;
 740
 741         /* Tx flags 5 GHz. */
 742         req->tx_cmd[1].tx_flags = htole32(IWM_TX_CMD_FLG_SEQ_CTL |
 743             IWM_TX_CMD_FLG_BT_DIS);
 744         req->tx_cmd[1].rate_n_flags =
 745             iwm_mvm_scan_rate_n_flags(sc, IEEE80211_CHAN_5GHZ, 1/*XXX*/);
 746         req->tx_cmd[1].sta_id = sc->sc_aux_sta.sta_id;
 747
 748         /* Check if we're doing an active directed scan. */
 749         nssid = MIN(ss->ss_nssid, IWM_PROBE_OPTION_MAX);
 750         for (i = 0; i < nssid; i++) {
 751                 req->direct_scan[i].id = IEEE80211_ELEMID_SSID;
 752                 req->direct_scan[i].len = MIN(ss->ss_ssid[i].len,
 753                     IEEE80211_NWID_LEN);
 754                 memcpy(req->direct_scan[i].ssid, ss->ss_ssid[i].ssid,
 755                     req->direct_scan[i].len);
 756                 /* XXX debug */
 757         }
 758         if (nssid != 0) {
 759                 req->scan_flags |=
 760                     htole32(IWM_MVM_LMAC_SCAN_FLAG_PRE_CONNECTION);
 761         } else
 762                 req->scan_flags |= htole32(IWM_MVM_LMAC_SCAN_FLAG_PASSIVE);
 763
 764         req->n_channels = iwm_mvm_lmac_scan_fill_channels(sc,
 765             (struct iwm_scan_channel_cfg_lmac *)req->data, nssid);
 766
 767         ret = iwm_mvm_fill_probe_req(sc,
 768                             (struct iwm_scan_probe_req *)(req->data +
 769                             (sizeof(struct iwm_scan_channel_cfg_lmac) *
 770                             sc->sc_fw.ucode_capa.n_scan_channels)));
 771         if (ret) {
 772                 free(req, M_DEVBUF);
 773                 return ret;
 774         }
 775
 776         /* Specify the scan plan: We'll do one iteration. */
 777         req->schedule[0].iterations = 1;
 778         req->schedule[0].full_scan_mul = 1;
 779
 780         if (iwm_mvm_scan_use_ebs(sc)) {
 781                 req->channel_opt[0].flags =
 782                         htole16(IWM_SCAN_CHANNEL_FLAG_EBS |
 783                                 IWM_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
 784                                 IWM_SCAN_CHANNEL_FLAG_CACHE_ADD);
 785                 req->channel_opt[0].non_ebs_ratio =
 786                         htole16(IWM_DENSE_EBS_SCAN_RATIO);
 787                 req->channel_opt[1].flags =
 788                         htole16(IWM_SCAN_CHANNEL_FLAG_EBS |
 789                                 IWM_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
 790                                 IWM_SCAN_CHANNEL_FLAG_CACHE_ADD);
 791                 req->channel_opt[1].non_ebs_ratio =
 792                         htole16(IWM_SPARSE_EBS_SCAN_RATIO);
 793         }
 794
 795         ret = iwm_send_cmd(sc, &hcmd);
 796         if (!ret) {
 797                 IWM_DPRINTF(sc, IWM_DEBUG_SCAN,
 798                     "Scan request was sent successfully\n");
 799         }
 800         free(req, M_DEVBUF);
 801         return ret;
 802 }
 803
 804 static int
 805 iwm_mvm_lmac_scan_abort(struct iwm_softc *sc)
 806 {
 807         int ret;
 808         struct iwm_host_cmd hcmd = {
 809                 .id = IWM_SCAN_OFFLOAD_ABORT_CMD,
 810                 .len = { 0, },
 811                 .data = { NULL, },
 812                 .flags = IWM_CMD_SYNC,
 813         };
 814         uint32_t status;
 815
 816         ret = iwm_mvm_send_cmd_status(sc, &hcmd, &status);
 817         if (ret)
 818                 return ret;
 819
 820         if (status != IWM_CAN_ABORT_STATUS) {
 821                 /*
 822                  * The scan abort will return 1 for success or
 823                  * 2 for "failure".  A failure condition can be
 824                  * due to simply not being in an active scan which
 825                  * can occur if we send the scan abort before the
 826                  * microcode has notified us that a scan is completed.
 827                  */
 828                 IWM_DPRINTF(sc, IWM_DEBUG_SCAN,
 829                     "SCAN OFFLOAD ABORT ret %d.\n", status);
 830                 ret = ENOENT;
 831         }
 832
 833         return ret;
 834 }
 835
 836 static int
 837 iwm_mvm_umac_scan_abort(struct iwm_softc *sc)
 838 {
 839         struct iwm_umac_scan_abort cmd = {};
 840         int uid, ret;
 841
 842         uid = 0;
 843         cmd.uid = htole32(uid);
 844
 845         IWM_DPRINTF(sc, IWM_DEBUG_SCAN, "Sending scan abort, uid %u\n", uid);
 846
 847         ret = iwm_mvm_send_cmd_pdu(sc,
 848                                    iwm_cmd_id(IWM_SCAN_ABORT_UMAC,
 849                                               IWM_ALWAYS_LONG_GROUP, 0),
 850                                    0, sizeof(cmd), &cmd);
 851
 852         return ret;
 853 }
 854
 855 int
 856 iwm_mvm_scan_stop_wait(struct iwm_softc *sc)
 857 {
 858         struct iwm_notification_wait wait_scan_done;
 859         static const uint16_t scan_done_notif[] = { IWM_SCAN_COMPLETE_UMAC,
 860                                                    IWM_SCAN_OFFLOAD_COMPLETE, };
 861         int ret;
 862
 863         iwm_init_notification_wait(sc->sc_notif_wait, &wait_scan_done,
 864                                    scan_done_notif, nitems(scan_done_notif),
 865                                    NULL, NULL);
 866
 867         IWM_DPRINTF(sc, IWM_DEBUG_SCAN, "Preparing to stop scan\n");
 868
 869         if (fw_has_capa(&sc->sc_fw.ucode_capa, IWM_UCODE_TLV_CAPA_UMAC_SCAN))
 870                 ret = iwm_mvm_umac_scan_abort(sc);
 871         else
 872                 ret = iwm_mvm_lmac_scan_abort(sc);
 873
 874         if (ret) {
 875                 IWM_DPRINTF(sc, IWM_DEBUG_SCAN, "couldn't stop scan\n");
 876                 iwm_remove_notification(sc->sc_notif_wait, &wait_scan_done);
 877                 return ret;
 878         }
 879
 880         IWM_UNLOCK(sc);
 881         ret = iwm_wait_notification(sc->sc_notif_wait, &wait_scan_done, hz);
 882         IWM_LOCK(sc);
 883
 884         return ret;
 885 }