drivers/net/wireless/ath/wil6210/cfg80211.c

   1 /*
   2  * Copyright (c) 2012 Qualcomm Atheros, Inc.
   3  *
   4  * Permission to use, copy, modify, and/or distribute this software for any
   5  * purpose with or without fee is hereby granted, provided that the above
   6  * copyright notice and this permission notice appear in all copies.
   7  *
   8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15  */
  16
  17 #include "wil6210.h"
  18 #include "wmi.h"
  19
  20 #define CHAN60G(_channel, _flags) {                             \
  21         .band                   = IEEE80211_BAND_60GHZ,         \
  22         .center_freq            = 56160 + (2160 * (_channel)),  \
  23         .hw_value               = (_channel),                   \
  24         .flags                  = (_flags),                     \
  25         .max_antenna_gain       = 0,                            \
  26         .max_power              = 40,                           \
  27 }
  28
  29 static struct ieee80211_channel wil_60ghz_channels[] = {
  30         CHAN60G(1, 0),
  31         CHAN60G(2, 0),
  32         CHAN60G(3, 0),
  33 /* channel 4 not supported yet */
  34 };
  35
  36 static struct ieee80211_supported_band wil_band_60ghz = {
  37         .channels = wil_60ghz_channels,
  38         .n_channels = ARRAY_SIZE(wil_60ghz_channels),
  39         .ht_cap = {
  40                 .ht_supported = true,
  41                 .cap = 0, /* TODO */
  42                 .ampdu_factor = IEEE80211_HT_MAX_AMPDU_64K, /* TODO */
  43                 .ampdu_density = IEEE80211_HT_MPDU_DENSITY_8, /* TODO */
  44                 .mcs = {
  45                                 /* MCS 1..12 - SC PHY */
  46                         .rx_mask = {0xfe, 0x1f}, /* 1..12 */
  47                         .tx_params = IEEE80211_HT_MCS_TX_DEFINED, /* TODO */
  48                 },
  49         },
  50 };
  51
  52 static const struct ieee80211_txrx_stypes
  53 wil_mgmt_stypes[NUM_NL80211_IFTYPES] = {
  54         [NL80211_IFTYPE_STATION] = {
  55                 .tx = BIT(IEEE80211_STYPE_ACTION >> 4) |
  56                 BIT(IEEE80211_STYPE_PROBE_RESP >> 4),
  57                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
  58                 BIT(IEEE80211_STYPE_PROBE_REQ >> 4)
  59         },
  60         [NL80211_IFTYPE_AP] = {
  61                 .tx = BIT(IEEE80211_STYPE_ACTION >> 4) |
  62                 BIT(IEEE80211_STYPE_PROBE_RESP >> 4),
  63                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
  64                 BIT(IEEE80211_STYPE_PROBE_REQ >> 4)
  65         },
  66         [NL80211_IFTYPE_P2P_CLIENT] = {
  67                 .tx = BIT(IEEE80211_STYPE_ACTION >> 4) |
  68                 BIT(IEEE80211_STYPE_PROBE_RESP >> 4),
  69                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
  70                 BIT(IEEE80211_STYPE_PROBE_REQ >> 4)
  71         },
  72         [NL80211_IFTYPE_P2P_GO] = {
  73                 .tx = BIT(IEEE80211_STYPE_ACTION >> 4) |
  74                 BIT(IEEE80211_STYPE_PROBE_RESP >> 4),
  75                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
  76                 BIT(IEEE80211_STYPE_PROBE_REQ >> 4)
  77         },
  78 };
  79
  80 static const u32 wil_cipher_suites[] = {
  81         WLAN_CIPHER_SUITE_GCMP,
  82 };
  83
  84 int wil_iftype_nl2wmi(enum nl80211_iftype type)
  85 {
  86         static const struct {
  87                 enum nl80211_iftype nl;
  88                 enum wmi_network_type wmi;
  89         } __nl2wmi[] = {
  90                 {NL80211_IFTYPE_ADHOC,          WMI_NETTYPE_ADHOC},
  91                 {NL80211_IFTYPE_STATION,        WMI_NETTYPE_INFRA},
  92                 {NL80211_IFTYPE_AP,             WMI_NETTYPE_AP},
  93                 {NL80211_IFTYPE_P2P_CLIENT,     WMI_NETTYPE_P2P},
  94                 {NL80211_IFTYPE_P2P_GO,         WMI_NETTYPE_P2P},
  95                 {NL80211_IFTYPE_MONITOR,        WMI_NETTYPE_ADHOC}, /* FIXME */
  96         };
  97         uint i;
  98
  99         for (i = 0; i < ARRAY_SIZE(__nl2wmi); i++) {
 100                 if (__nl2wmi[i].nl == type)
 101                         return __nl2wmi[i].wmi;
 102         }
 103
 104         return -EOPNOTSUPP;
 105 }
 106
 107 static int wil_cfg80211_get_station(struct wiphy *wiphy,
 108                                     struct net_device *ndev,
 109                                     u8 *mac, struct station_info *sinfo)
 110 {
 111         struct wil6210_priv *wil = wiphy_to_wil(wiphy);
 112         int rc;
 113         struct wmi_notify_req_cmd cmd = {
 114                 .cid = 0,
 115                 .interval_usec = 0,
 116         };
 117
 118         if (memcmp(mac, wil->dst_addr[0], ETH_ALEN))
 119                 return -ENOENT;
 120
 121         /* WMI_NOTIFY_REQ_DONE_EVENTID handler fills wil->stats.bf_mcs */
 122         rc = wmi_call(wil, WMI_NOTIFY_REQ_CMDID, &cmd, sizeof(cmd),
 123                       WMI_NOTIFY_REQ_DONE_EVENTID, NULL, 0, 20);
 124         if (rc)
 125                 return rc;
 126
 127         sinfo->generation = wil->sinfo_gen;
 128
 129         sinfo->filled |= STATION_INFO_TX_BITRATE;
 130         sinfo->txrate.flags = RATE_INFO_FLAGS_MCS | RATE_INFO_FLAGS_60G;
 131         sinfo->txrate.mcs = wil->stats.bf_mcs;
 132         sinfo->filled |= STATION_INFO_RX_BITRATE;
 133         sinfo->rxrate.flags = RATE_INFO_FLAGS_MCS | RATE_INFO_FLAGS_60G;
 134         sinfo->rxrate.mcs = wil->stats.last_mcs_rx;
 135
 136         if (test_bit(wil_status_fwconnected, &wil->status)) {
 137                 sinfo->filled |= STATION_INFO_SIGNAL;
 138                 sinfo->signal = 12; /* TODO: provide real value */
 139         }
 140
 141         return 0;
 142 }
 143
 144 static int wil_cfg80211_change_iface(struct wiphy *wiphy,
 145                                      struct net_device *ndev,
 146                                      enum nl80211_iftype type, u32 *flags,
 147                                      struct vif_params *params)
 148 {
 149         struct wil6210_priv *wil = wiphy_to_wil(wiphy);
 150         struct wireless_dev *wdev = wil->wdev;
 151
 152         switch (type) {
 153         case NL80211_IFTYPE_STATION:
 154         case NL80211_IFTYPE_AP:
 155         case NL80211_IFTYPE_P2P_CLIENT:
 156         case NL80211_IFTYPE_P2P_GO:
 157                 break;
 158         case NL80211_IFTYPE_MONITOR:
 159                 if (flags)
 160                         wil->monitor_flags = *flags;
 161                 else
 162                         wil->monitor_flags = 0;
 163
 164                 break;
 165         default:
 166                 return -EOPNOTSUPP;
 167         }
 168
 169         wdev->iftype = type;
 170
 171         return 0;
 172 }
 173
 174 static int wil_cfg80211_scan(struct wiphy *wiphy,
 175                              struct cfg80211_scan_request *request)
 176 {
 177         struct wil6210_priv *wil = wiphy_to_wil(wiphy);
 178         struct wireless_dev *wdev = wil->wdev;
 179         struct {
 180                 struct wmi_start_scan_cmd cmd;
 181                 u16 chnl[4];
 182         } __packed cmd;
 183         uint i, n;
 184
 185         if (wil->scan_request) {
 186                 wil_err(wil, "Already scanning\n");
 187                 return -EAGAIN;
 188         }
 189
 190         /* check we are client side */
 191         switch (wdev->iftype) {
 192         case NL80211_IFTYPE_STATION:
 193         case NL80211_IFTYPE_P2P_CLIENT:
 194                 break;
 195         default:
 196                 return -EOPNOTSUPP;
 197         }
 198
 199         /* FW don't support scan after connection attempt */
 200         if (test_bit(wil_status_dontscan, &wil->status)) {
 201                 wil_err(wil, "Scan after connect attempt not supported\n");
 202                 return -EBUSY;
 203         }
 204
 205         wil->scan_request = request;
 206
 207         memset(&cmd, 0, sizeof(cmd));
 208         cmd.cmd.num_channels = 0;
 209         n = min(request->n_channels, 4U);
 210         for (i = 0; i < n; i++) {
 211                 int ch = request->channels[i]->hw_value;
 212                 if (ch == 0) {
 213                         wil_err(wil,
 214                                 "Scan requested for unknown frequency %dMhz\n",
 215                                 request->channels[i]->center_freq);
 216                         continue;
 217                 }
 218                 /* 0-based channel indexes */
 219                 cmd.cmd.channel_list[cmd.cmd.num_channels++].channel = ch - 1;
 220                 wil_dbg_misc(wil, "Scan for ch %d  : %d MHz\n", ch,
 221                              request->channels[i]->center_freq);
 222         }
 223
 224         return wmi_send(wil, WMI_START_SCAN_CMDID, &cmd, sizeof(cmd.cmd) +
 225                         cmd.cmd.num_channels * sizeof(cmd.cmd.channel_list[0]));
 226 }
 227
 228 static int wil_cfg80211_connect(struct wiphy *wiphy,
 229                                 struct net_device *ndev,
 230                                 struct cfg80211_connect_params *sme)
 231 {
 232         struct wil6210_priv *wil = wiphy_to_wil(wiphy);
 233         struct cfg80211_bss *bss;
 234         struct wmi_connect_cmd conn;
 235         const u8 *ssid_eid;
 236         const u8 *rsn_eid;
 237         int ch;
 238         int rc = 0;
 239
 240         bss = cfg80211_get_bss(wiphy, sme->channel, sme->bssid,
 241                                sme->ssid, sme->ssid_len,
 242                                WLAN_CAPABILITY_ESS, WLAN_CAPABILITY_ESS);
 243         if (!bss) {
 244                 wil_err(wil, "Unable to find BSS\n");
 245                 return -ENOENT;
 246         }
 247
 248         ssid_eid = ieee80211_bss_get_ie(bss, WLAN_EID_SSID);
 249         if (!ssid_eid) {
 250                 wil_err(wil, "No SSID\n");
 251                 rc = -ENOENT;
 252                 goto out;
 253         }
 254
 255         rsn_eid = sme->ie ?
 256                         cfg80211_find_ie(WLAN_EID_RSN, sme->ie, sme->ie_len) :
 257                         NULL;
 258         if (rsn_eid) {
 259                 if (sme->ie_len > WMI_MAX_IE_LEN) {
 260                         rc = -ERANGE;
 261                         wil_err(wil, "IE too large (%td bytes)\n",
 262                                 sme->ie_len);
 263                         goto out;
 264                 }
 265                 /*
 266                  * For secure assoc, send:
 267                  * (1) WMI_DELETE_CIPHER_KEY_CMD
 268                  * (2) WMI_SET_APPIE_CMD
 269                  */
 270                 rc = wmi_del_cipher_key(wil, 0, bss->bssid);
 271                 if (rc) {
 272                         wil_err(wil, "WMI_DELETE_CIPHER_KEY_CMD failed\n");
 273                         goto out;
 274                 }
 275                 /* WMI_SET_APPIE_CMD */
 276                 rc = wmi_set_ie(wil, WMI_FRAME_ASSOC_REQ, sme->ie_len, sme->ie);
 277                 if (rc) {
 278                         wil_err(wil, "WMI_SET_APPIE_CMD failed\n");
 279                         goto out;
 280                 }
 281         }
 282
 283         /* WMI_CONNECT_CMD */
 284         memset(&conn, 0, sizeof(conn));
 285         switch (bss->capability & WLAN_CAPABILITY_DMG_TYPE_MASK) {
 286         case WLAN_CAPABILITY_DMG_TYPE_AP:
 287                 conn.network_type = WMI_NETTYPE_INFRA;
 288                 break;
 289         case WLAN_CAPABILITY_DMG_TYPE_PBSS:
 290                 conn.network_type = WMI_NETTYPE_P2P;
 291                 break;
 292         default:
 293                 wil_err(wil, "Unsupported BSS type, capability= 0x%04x\n",
 294                         bss->capability);
 295                 goto out;
 296         }
 297         if (rsn_eid) {
 298                 conn.dot11_auth_mode = WMI_AUTH11_SHARED;
 299                 conn.auth_mode = WMI_AUTH_WPA2_PSK;
 300                 conn.pairwise_crypto_type = WMI_CRYPT_AES_GCMP;
 301                 conn.pairwise_crypto_len = 16;
 302         } else {
 303                 conn.dot11_auth_mode = WMI_AUTH11_OPEN;
 304                 conn.auth_mode = WMI_AUTH_NONE;
 305         }
 306
 307         conn.ssid_len = min_t(u8, ssid_eid[1], 32);
 308         memcpy(conn.ssid, ssid_eid+2, conn.ssid_len);
 309
 310         ch = bss->channel->hw_value;
 311         if (ch == 0) {
 312                 wil_err(wil, "BSS at unknown frequency %dMhz\n",
 313                         bss->channel->center_freq);
 314                 rc = -EOPNOTSUPP;
 315                 goto out;
 316         }
 317         conn.channel = ch - 1;
 318
 319         memcpy(conn.bssid, bss->bssid, 6);
 320         memcpy(conn.dst_mac, bss->bssid, 6);
 321         /*
 322          * FW don't support scan after connection attempt
 323          */
 324         set_bit(wil_status_dontscan, &wil->status);
 325
 326         rc = wmi_send(wil, WMI_CONNECT_CMDID, &conn, sizeof(conn));
 327         if (rc == 0) {
 328                 /* Connect can take lots of time */
 329                 mod_timer(&wil->connect_timer,
 330                           jiffies + msecs_to_jiffies(2000));
 331         }
 332
 333  out:
 334         cfg80211_put_bss(wiphy, bss);
 335
 336         return rc;
 337 }
 338
 339 static int wil_cfg80211_disconnect(struct wiphy *wiphy,
 340                                    struct net_device *ndev,
 341                                    u16 reason_code)
 342 {
 343         int rc;
 344         struct wil6210_priv *wil = wiphy_to_wil(wiphy);
 345
 346         rc = wmi_send(wil, WMI_DISCONNECT_CMDID, NULL, 0);
 347
 348         return rc;
 349 }
 350
 351 static int wil_cfg80211_set_channel(struct wiphy *wiphy,
 352                                     struct cfg80211_chan_def *chandef)
 353 {
 354         struct wil6210_priv *wil = wiphy_to_wil(wiphy);
 355         struct wireless_dev *wdev = wil->wdev;
 356
 357         wdev->preset_chandef = *chandef;
 358
 359         return 0;
 360 }
 361
 362 static int wil_cfg80211_add_key(struct wiphy *wiphy,
 363                                 struct net_device *ndev,
 364                                 u8 key_index, bool pairwise,
 365                                 const u8 *mac_addr,
 366                                 struct key_params *params)
 367 {
 368         struct wil6210_priv *wil = wiphy_to_wil(wiphy);
 369
 370         /* group key is not used */
 371         if (!pairwise)
 372                 return 0;
 373
 374         return wmi_add_cipher_key(wil, key_index, mac_addr,
 375                                   params->key_len, params->key);
 376 }
 377
 378 static int wil_cfg80211_del_key(struct wiphy *wiphy,
 379                                 struct net_device *ndev,
 380                                 u8 key_index, bool pairwise,
 381                                 const u8 *mac_addr)
 382 {
 383         struct wil6210_priv *wil = wiphy_to_wil(wiphy);
 384
 385         /* group key is not used */
 386         if (!pairwise)
 387                 return 0;
 388
 389         return wmi_del_cipher_key(wil, key_index, mac_addr);
 390 }
 391
 392 /* Need to be present or wiphy_new() will WARN */
 393 static int wil_cfg80211_set_default_key(struct wiphy *wiphy,
 394                                         struct net_device *ndev,
 395                                         u8 key_index, bool unicast,
 396                                         bool multicast)
 397 {
 398         return 0;
 399 }
 400
 401 static int wil_cfg80211_start_ap(struct wiphy *wiphy,
 402                                  struct net_device *ndev,
 403                                  struct cfg80211_ap_settings *info)
 404 {
 405         int rc = 0;
 406         struct wil6210_priv *wil = wiphy_to_wil(wiphy);
 407         struct wireless_dev *wdev = ndev->ieee80211_ptr;
 408         struct ieee80211_channel *channel = info->chandef.chan;
 409         struct cfg80211_beacon_data *bcon = &info->beacon;
 410         u8 wmi_nettype = wil_iftype_nl2wmi(wdev->iftype);
 411
 412         if (!channel) {
 413                 wil_err(wil, "AP: No channel???\n");
 414                 return -EINVAL;
 415         }
 416
 417         wil_dbg_misc(wil, "AP on Channel %d %d MHz, %s\n", channel->hw_value,
 418                      channel->center_freq, info->privacy ? "secure" : "open");
 419         print_hex_dump_bytes("SSID ", DUMP_PREFIX_OFFSET,
 420                              info->ssid, info->ssid_len);
 421
 422         rc = wil_reset(wil);
 423         if (rc)
 424                 return rc;
 425
 426         rc = wmi_set_ssid(wil, info->ssid_len, info->ssid);
 427         if (rc)
 428                 return rc;
 429
 430         /* MAC address - pre-requisite for other commands */
 431         wmi_set_mac_address(wil, ndev->dev_addr);
 432
 433         /* IE's */
 434         /* bcon 'head IE's are not relevant for 60g band */
 435         /*
 436          * FW do not form regular beacon, so bcon IE's are not set
 437          * For the DMG bcon, when it will be supported, bcon IE's will
 438          * be reused; add something like:
 439          * wmi_set_ie(wil, WMI_FRAME_BEACON, bcon->beacon_ies_len,
 440          * bcon->beacon_ies);
 441          */
 442         wmi_set_ie(wil, WMI_FRAME_PROBE_RESP, bcon->proberesp_ies_len,
 443                    bcon->proberesp_ies);
 444         wmi_set_ie(wil, WMI_FRAME_ASSOC_RESP, bcon->assocresp_ies_len,
 445                    bcon->assocresp_ies);
 446
 447         wil->secure_pcp = info->privacy;
 448
 449         rc = wmi_pcp_start(wil, info->beacon_interval, wmi_nettype,
 450                            channel->hw_value);
 451         if (rc)
 452                 return rc;
 453
 454         /* Rx VRING. After MAC and beacon */
 455         rc = wil_rx_init(wil);
 456
 457         netif_carrier_on(ndev);
 458
 459         return rc;
 460 }
 461
 462 static int wil_cfg80211_stop_ap(struct wiphy *wiphy,
 463                                 struct net_device *ndev)
 464 {
 465         int rc = 0;
 466         struct wil6210_priv *wil = wiphy_to_wil(wiphy);
 467
 468         rc = wmi_pcp_stop(wil);
 469
 470         return rc;
 471 }
 472
 473 static struct cfg80211_ops wil_cfg80211_ops = {
 474         .scan = wil_cfg80211_scan,
 475         .connect = wil_cfg80211_connect,
 476         .disconnect = wil_cfg80211_disconnect,
 477         .change_virtual_intf = wil_cfg80211_change_iface,
 478         .get_station = wil_cfg80211_get_station,
 479         .set_monitor_channel = wil_cfg80211_set_channel,
 480         .add_key = wil_cfg80211_add_key,
 481         .del_key = wil_cfg80211_del_key,
 482         .set_default_key = wil_cfg80211_set_default_key,
 483         /* AP mode */
 484         .start_ap = wil_cfg80211_start_ap,
 485         .stop_ap = wil_cfg80211_stop_ap,
 486 };
 487
 488 static void wil_wiphy_init(struct wiphy *wiphy)
 489 {
 490         /* TODO: set real value */
 491         wiphy->max_scan_ssids = 10;
 492         wiphy->max_num_pmkids = 0 /* TODO: */;
 493         wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
 494                                  BIT(NL80211_IFTYPE_AP) |
 495                                  BIT(NL80211_IFTYPE_MONITOR);
 496         /* TODO: enable P2P when integrated with supplicant:
 497          * BIT(NL80211_IFTYPE_P2P_CLIENT) | BIT(NL80211_IFTYPE_P2P_GO)
 498          */
 499         wiphy->flags |= WIPHY_FLAG_HAVE_AP_SME |
 500                         WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD;
 501         dev_warn(wiphy_dev(wiphy), "%s : flags = 0x%08x\n",
 502                  __func__, wiphy->flags);
 503         wiphy->probe_resp_offload =
 504                 NL80211_PROBE_RESP_OFFLOAD_SUPPORT_WPS |
 505                 NL80211_PROBE_RESP_OFFLOAD_SUPPORT_WPS2 |
 506                 NL80211_PROBE_RESP_OFFLOAD_SUPPORT_P2P;
 507
 508         wiphy->bands[IEEE80211_BAND_60GHZ] = &wil_band_60ghz;
 509
 510         /* TODO: figure this out */
 511         wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
 512
 513         wiphy->cipher_suites = wil_cipher_suites;
 514         wiphy->n_cipher_suites = ARRAY_SIZE(wil_cipher_suites);
 515         wiphy->mgmt_stypes = wil_mgmt_stypes;
 516 }
 517
 518 struct wireless_dev *wil_cfg80211_init(struct device *dev)
 519 {
 520         int rc = 0;
 521         struct wireless_dev *wdev;
 522
 523         wdev = kzalloc(sizeof(struct wireless_dev), GFP_KERNEL);
 524         if (!wdev)
 525                 return ERR_PTR(-ENOMEM);
 526
 527         wdev->wiphy = wiphy_new(&wil_cfg80211_ops,
 528                                 sizeof(struct wil6210_priv));
 529         if (!wdev->wiphy) {
 530                 rc = -ENOMEM;
 531                 goto out;
 532         }
 533
 534         set_wiphy_dev(wdev->wiphy, dev);
 535         wil_wiphy_init(wdev->wiphy);
 536
 537         rc = wiphy_register(wdev->wiphy);
 538         if (rc < 0)
 539                 goto out_failed_reg;
 540
 541         return wdev;
 542
 543 out_failed_reg:
 544         wiphy_free(wdev->wiphy);
 545 out:
 546         kfree(wdev);
 547
 548         return ERR_PTR(rc);
 549 }
 550
 551 void wil_wdev_free(struct wil6210_priv *wil)
 552 {
 553         struct wireless_dev *wdev = wil_to_wdev(wil);
 554
 555         if (!wdev)
 556                 return;
 557
 558         wiphy_unregister(wdev->wiphy);
 559         wiphy_free(wdev->wiphy);
 560         kfree(wdev);
 561 }