drivers/net/wireless/brcm80211/brcmfmac/p2p.c

   1 /*
   2  * Copyright (c) 2012 Broadcom Corporation
   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 ANY
  11  * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
  13  * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
  14  * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15  */
  16 #include <linux/slab.h>
  17 #include <linux/netdevice.h>
  18 #include <linux/etherdevice.h>
  19 #include <net/cfg80211.h>
  20
  21 #include <brcmu_wifi.h>
  22 #include <brcmu_utils.h>
  23 #include <defs.h>
  24 #include <dhd.h>
  25 #include <dhd_dbg.h>
  26 #include "fwil.h"
  27 #include "fwil_types.h"
  28 #include "p2p.h"
  29 #include "wl_cfg80211.h"
  30
  31 /* parameters used for p2p escan */
  32 #define P2PAPI_SCAN_NPROBES 1
  33 #define P2PAPI_SCAN_DWELL_TIME_MS 80
  34 #define P2PAPI_SCAN_SOCIAL_DWELL_TIME_MS 40
  35 #define P2PAPI_SCAN_HOME_TIME_MS 60
  36 #define P2PAPI_SCAN_NPROBS_TIME_MS 30
  37 #define P2PAPI_SCAN_AF_SEARCH_DWELL_TIME_MS 100
  38 #define WL_SCAN_CONNECT_DWELL_TIME_MS 200
  39 #define WL_SCAN_JOIN_PROBE_INTERVAL_MS 20
  40
  41 #define BRCMF_P2P_WILDCARD_SSID         "DIRECT-"
  42 #define BRCMF_P2P_WILDCARD_SSID_LEN     (sizeof(BRCMF_P2P_WILDCARD_SSID) - 1)
  43
  44 #define SOCIAL_CHAN_1           1
  45 #define SOCIAL_CHAN_2           6
  46 #define SOCIAL_CHAN_3           11
  47 #define IS_P2P_SOCIAL_CHANNEL(channel) ((channel == SOCIAL_CHAN_1) || \
  48                                          (channel == SOCIAL_CHAN_2) || \
  49                                          (channel == SOCIAL_CHAN_3))
  50 #define BRCMF_P2P_TEMP_CHAN     SOCIAL_CHAN_3
  51 #define SOCIAL_CHAN_CNT         3
  52 #define AF_PEER_SEARCH_CNT      2
  53
  54 #define BRCMF_SCB_TIMEOUT_VALUE 20
  55
  56 #define P2P_VER                 9       /* P2P version: 9=WiFi P2P v1.0 */
  57 #define P2P_PUB_AF_CATEGORY     0x04
  58 #define P2P_PUB_AF_ACTION       0x09
  59 #define P2P_AF_CATEGORY         0x7f
  60 #define P2P_OUI                 "\x50\x6F\x9A"  /* P2P OUI */
  61 #define P2P_OUI_LEN             3               /* P2P OUI length */
  62
  63 /* Action Frame Constants */
  64 #define DOT11_ACTION_HDR_LEN    2       /* action frame category + action */
  65 #define DOT11_ACTION_CAT_OFF    0       /* category offset */
  66 #define DOT11_ACTION_ACT_OFF    1       /* action offset */
  67
  68 #define P2P_AF_DWELL_TIME               200
  69 #define P2P_AF_MIN_DWELL_TIME           100
  70 #define P2P_AF_MED_DWELL_TIME           400
  71 #define P2P_AF_LONG_DWELL_TIME          1000
  72 #define P2P_AF_TX_MAX_RETRY             1
  73 #define P2P_AF_MAX_WAIT_TIME            2000
  74 #define P2P_INVALID_CHANNEL             -1
  75 #define P2P_CHANNEL_SYNC_RETRY          5
  76 #define P2P_AF_FRM_SCAN_MAX_WAIT        1500
  77 #define P2P_DEFAULT_SLEEP_TIME_VSDB     200
  78
  79 /* WiFi P2P Public Action Frame OUI Subtypes */
  80 #define P2P_PAF_GON_REQ         0       /* Group Owner Negotiation Req */
  81 #define P2P_PAF_GON_RSP         1       /* Group Owner Negotiation Rsp */
  82 #define P2P_PAF_GON_CONF        2       /* Group Owner Negotiation Confirm */
  83 #define P2P_PAF_INVITE_REQ      3       /* P2P Invitation Request */
  84 #define P2P_PAF_INVITE_RSP      4       /* P2P Invitation Response */
  85 #define P2P_PAF_DEVDIS_REQ      5       /* Device Discoverability Request */
  86 #define P2P_PAF_DEVDIS_RSP      6       /* Device Discoverability Response */
  87 #define P2P_PAF_PROVDIS_REQ     7       /* Provision Discovery Request */
  88 #define P2P_PAF_PROVDIS_RSP     8       /* Provision Discovery Response */
  89 #define P2P_PAF_SUBTYPE_INVALID 255     /* Invalid Subtype */
  90
  91 /* WiFi P2P Action Frame OUI Subtypes */
  92 #define P2P_AF_NOTICE_OF_ABSENCE        0       /* Notice of Absence */
  93 #define P2P_AF_PRESENCE_REQ             1       /* P2P Presence Request */
  94 #define P2P_AF_PRESENCE_RSP             2       /* P2P Presence Response */
  95 #define P2P_AF_GO_DISC_REQ              3       /* GO Discoverability Request */
  96
  97 /* P2P Service Discovery related */
  98 #define P2PSD_ACTION_CATEGORY           0x04    /* Public action frame */
  99 #define P2PSD_ACTION_ID_GAS_IREQ        0x0a    /* GAS Initial Request AF */
 100 #define P2PSD_ACTION_ID_GAS_IRESP       0x0b    /* GAS Initial Response AF */
 101 #define P2PSD_ACTION_ID_GAS_CREQ        0x0c    /* GAS Comback Request AF */
 102 #define P2PSD_ACTION_ID_GAS_CRESP       0x0d    /* GAS Comback Response AF */
 103
 104 /**
 105  * struct brcmf_p2p_disc_st_le - set discovery state in firmware.
 106  *
 107  * @state: requested discovery state (see enum brcmf_p2p_disc_state).
 108  * @chspec: channel parameter for %WL_P2P_DISC_ST_LISTEN state.
 109  * @dwell: dwell time in ms for %WL_P2P_DISC_ST_LISTEN state.
 110  */
 111 struct brcmf_p2p_disc_st_le {
 112         u8 state;
 113         __le16 chspec;
 114         __le16 dwell;
 115 };
 116
 117 /**
 118  * enum brcmf_p2p_disc_state - P2P discovery state values
 119  *
 120  * @WL_P2P_DISC_ST_SCAN: P2P discovery with wildcard SSID and P2P IE.
 121  * @WL_P2P_DISC_ST_LISTEN: P2P discovery off-channel for specified time.
 122  * @WL_P2P_DISC_ST_SEARCH: P2P discovery with P2P wildcard SSID and P2P IE.
 123  */
 124 enum brcmf_p2p_disc_state {
 125         WL_P2P_DISC_ST_SCAN,
 126         WL_P2P_DISC_ST_LISTEN,
 127         WL_P2P_DISC_ST_SEARCH
 128 };
 129
 130 /**
 131  * struct brcmf_p2p_scan_le - P2P specific scan request.
 132  *
 133  * @type: type of scan method requested (values: 'E' or 'S').
 134  * @reserved: reserved (ignored).
 135  * @eparams: parameters used for type 'E'.
 136  * @sparams: parameters used for type 'S'.
 137  */
 138 struct brcmf_p2p_scan_le {
 139         u8 type;
 140         u8 reserved[3];
 141         union {
 142                 struct brcmf_escan_params_le eparams;
 143                 struct brcmf_scan_params_le sparams;
 144         };
 145 };
 146
 147 /**
 148  * struct brcmf_p2p_pub_act_frame - WiFi P2P Public Action Frame
 149  *
 150  * @category: P2P_PUB_AF_CATEGORY
 151  * @action: P2P_PUB_AF_ACTION
 152  * @oui[3]: P2P_OUI
 153  * @oui_type: OUI type - P2P_VER
 154  * @subtype: OUI subtype - P2P_TYPE_*
 155  * @dialog_token: nonzero, identifies req/rsp transaction
 156  * @elts[1]: Variable length information elements.
 157  */
 158 struct brcmf_p2p_pub_act_frame {
 159         u8      category;
 160         u8      action;
 161         u8      oui[3];
 162         u8      oui_type;
 163         u8      subtype;
 164         u8      dialog_token;
 165         u8      elts[1];
 166 };
 167
 168 /**
 169  * struct brcmf_p2p_action_frame - WiFi P2P Action Frame
 170  *
 171  * @category: P2P_AF_CATEGORY
 172  * @OUI[3]: OUI - P2P_OUI
 173  * @type: OUI Type - P2P_VER
 174  * @subtype: OUI Subtype - P2P_AF_*
 175  * @dialog_token: nonzero, identifies req/resp tranaction
 176  * @elts[1]: Variable length information elements.
 177  */
 178 struct brcmf_p2p_action_frame {
 179         u8      category;
 180         u8      oui[3];
 181         u8      type;
 182         u8      subtype;
 183         u8      dialog_token;
 184         u8      elts[1];
 185 };
 186
 187 /**
 188  * struct brcmf_p2psd_gas_pub_act_frame - Wi-Fi GAS Public Action Frame
 189  *
 190  * @category: 0x04 Public Action Frame
 191  * @action: 0x6c Advertisement Protocol
 192  * @dialog_token: nonzero, identifies req/rsp transaction
 193  * @query_data[1]: Query Data. SD gas ireq SD gas iresp
 194  */
 195 struct brcmf_p2psd_gas_pub_act_frame {
 196         u8      category;
 197         u8      action;
 198         u8      dialog_token;
 199         u8      query_data[1];
 200 };
 201
 202 /**
 203  * struct brcmf_config_af_params - Action Frame Parameters for tx.
 204  *
 205  * @mpc_onoff: To make sure to send successfully action frame, we have to
 206  *             turn off mpc  0: off, 1: on,  (-1): do nothing
 207  * @search_channel: 1: search peer's channel to send af
 208  * extra_listen: keep the dwell time to get af response frame.
 209  */
 210 struct brcmf_config_af_params {
 211         s32 mpc_onoff;
 212         bool search_channel;
 213         bool extra_listen;
 214 };
 215
 216 /**
 217  * brcmf_p2p_is_pub_action() - true if p2p public type frame.
 218  *
 219  * @frame: action frame data.
 220  * @frame_len: length of action frame data.
 221  *
 222  * Determine if action frame is p2p public action type
 223  */
 224 static bool brcmf_p2p_is_pub_action(void *frame, u32 frame_len)
 225 {
 226         struct brcmf_p2p_pub_act_frame *pact_frm;
 227
 228         if (frame == NULL)
 229                 return false;
 230
 231         pact_frm = (struct brcmf_p2p_pub_act_frame *)frame;
 232         if (frame_len < sizeof(struct brcmf_p2p_pub_act_frame) - 1)
 233                 return false;
 234
 235         if (pact_frm->category == P2P_PUB_AF_CATEGORY &&
 236             pact_frm->action == P2P_PUB_AF_ACTION &&
 237             pact_frm->oui_type == P2P_VER &&
 238             memcmp(pact_frm->oui, P2P_OUI, P2P_OUI_LEN) == 0)
 239                 return true;
 240
 241         return false;
 242 }
 243
 244 /**
 245  * brcmf_p2p_is_p2p_action() - true if p2p action type frame.
 246  *
 247  * @frame: action frame data.
 248  * @frame_len: length of action frame data.
 249  *
 250  * Determine if action frame is p2p action type
 251  */
 252 static bool brcmf_p2p_is_p2p_action(void *frame, u32 frame_len)
 253 {
 254         struct brcmf_p2p_action_frame *act_frm;
 255
 256         if (frame == NULL)
 257                 return false;
 258
 259         act_frm = (struct brcmf_p2p_action_frame *)frame;
 260         if (frame_len < sizeof(struct brcmf_p2p_action_frame) - 1)
 261                 return false;
 262
 263         if (act_frm->category == P2P_AF_CATEGORY &&
 264             act_frm->type  == P2P_VER &&
 265             memcmp(act_frm->oui, P2P_OUI, P2P_OUI_LEN) == 0)
 266                 return true;
 267
 268         return false;
 269 }
 270
 271 /**
 272  * brcmf_p2p_is_gas_action() - true if p2p gas action type frame.
 273  *
 274  * @frame: action frame data.
 275  * @frame_len: length of action frame data.
 276  *
 277  * Determine if action frame is p2p gas action type
 278  */
 279 static bool brcmf_p2p_is_gas_action(void *frame, u32 frame_len)
 280 {
 281         struct brcmf_p2psd_gas_pub_act_frame *sd_act_frm;
 282
 283         if (frame == NULL)
 284                 return false;
 285
 286         sd_act_frm = (struct brcmf_p2psd_gas_pub_act_frame *)frame;
 287         if (frame_len < sizeof(struct brcmf_p2psd_gas_pub_act_frame) - 1)
 288                 return false;
 289
 290         if (sd_act_frm->category != P2PSD_ACTION_CATEGORY)
 291                 return false;
 292
 293         if (sd_act_frm->action == P2PSD_ACTION_ID_GAS_IREQ ||
 294             sd_act_frm->action == P2PSD_ACTION_ID_GAS_IRESP ||
 295             sd_act_frm->action == P2PSD_ACTION_ID_GAS_CREQ ||
 296             sd_act_frm->action == P2PSD_ACTION_ID_GAS_CRESP)
 297                 return true;
 298
 299         return false;
 300 }
 301
 302 /**
 303  * brcmf_p2p_print_actframe() - debug print routine.
 304  *
 305  * @tx: Received or to be transmitted
 306  * @frame: action frame data.
 307  * @frame_len: length of action frame data.
 308  *
 309  * Print information about the p2p action frame
 310  */
 311
 312 #ifdef DEBUG
 313
 314 static void brcmf_p2p_print_actframe(bool tx, void *frame, u32 frame_len)
 315 {
 316         struct brcmf_p2p_pub_act_frame *pact_frm;
 317         struct brcmf_p2p_action_frame *act_frm;
 318         struct brcmf_p2psd_gas_pub_act_frame *sd_act_frm;
 319
 320         if (!frame || frame_len <= 2)
 321                 return;
 322
 323         if (brcmf_p2p_is_pub_action(frame, frame_len)) {
 324                 pact_frm = (struct brcmf_p2p_pub_act_frame *)frame;
 325                 switch (pact_frm->subtype) {
 326                 case P2P_PAF_GON_REQ:
 327                         brcmf_dbg(TRACE, "%s P2P Group Owner Negotiation Req Frame\n",
 328                                   (tx) ? "TX" : "RX");
 329                         break;
 330                 case P2P_PAF_GON_RSP:
 331                         brcmf_dbg(TRACE, "%s P2P Group Owner Negotiation Rsp Frame\n",
 332                                   (tx) ? "TX" : "RX");
 333                         break;
 334                 case P2P_PAF_GON_CONF:
 335                         brcmf_dbg(TRACE, "%s P2P Group Owner Negotiation Confirm Frame\n",
 336                                   (tx) ? "TX" : "RX");
 337                         break;
 338                 case P2P_PAF_INVITE_REQ:
 339                         brcmf_dbg(TRACE, "%s P2P Invitation Request  Frame\n",
 340                                   (tx) ? "TX" : "RX");
 341                         break;
 342                 case P2P_PAF_INVITE_RSP:
 343                         brcmf_dbg(TRACE, "%s P2P Invitation Response Frame\n",
 344                                   (tx) ? "TX" : "RX");
 345                         break;
 346                 case P2P_PAF_DEVDIS_REQ:
 347                         brcmf_dbg(TRACE, "%s P2P Device Discoverability Request Frame\n",
 348                                   (tx) ? "TX" : "RX");
 349                         break;
 350                 case P2P_PAF_DEVDIS_RSP:
 351                         brcmf_dbg(TRACE, "%s P2P Device Discoverability Response Frame\n",
 352                                   (tx) ? "TX" : "RX");
 353                         break;
 354                 case P2P_PAF_PROVDIS_REQ:
 355                         brcmf_dbg(TRACE, "%s P2P Provision Discovery Request Frame\n",
 356                                   (tx) ? "TX" : "RX");
 357                         break;
 358                 case P2P_PAF_PROVDIS_RSP:
 359                         brcmf_dbg(TRACE, "%s P2P Provision Discovery Response Frame\n",
 360                                   (tx) ? "TX" : "RX");
 361                         break;
 362                 default:
 363                         brcmf_dbg(TRACE, "%s Unknown P2P Public Action Frame\n",
 364                                   (tx) ? "TX" : "RX");
 365                         break;
 366                 }
 367         } else if (brcmf_p2p_is_p2p_action(frame, frame_len)) {
 368                 act_frm = (struct brcmf_p2p_action_frame *)frame;
 369                 switch (act_frm->subtype) {
 370                 case P2P_AF_NOTICE_OF_ABSENCE:
 371                         brcmf_dbg(TRACE, "%s P2P Notice of Absence Frame\n",
 372                                   (tx) ? "TX" : "RX");
 373                         break;
 374                 case P2P_AF_PRESENCE_REQ:
 375                         brcmf_dbg(TRACE, "%s P2P Presence Request Frame\n",
 376                                   (tx) ? "TX" : "RX");
 377                         break;
 378                 case P2P_AF_PRESENCE_RSP:
 379                         brcmf_dbg(TRACE, "%s P2P Presence Response Frame\n",
 380                                   (tx) ? "TX" : "RX");
 381                         break;
 382                 case P2P_AF_GO_DISC_REQ:
 383                         brcmf_dbg(TRACE, "%s P2P Discoverability Request Frame\n",
 384                                   (tx) ? "TX" : "RX");
 385                         break;
 386                 default:
 387                         brcmf_dbg(TRACE, "%s Unknown P2P Action Frame\n",
 388                                   (tx) ? "TX" : "RX");
 389                 }
 390
 391         } else if (brcmf_p2p_is_gas_action(frame, frame_len)) {
 392                 sd_act_frm = (struct brcmf_p2psd_gas_pub_act_frame *)frame;
 393                 switch (sd_act_frm->action) {
 394                 case P2PSD_ACTION_ID_GAS_IREQ:
 395                         brcmf_dbg(TRACE, "%s P2P GAS Initial Request\n",
 396                                   (tx) ? "TX" : "RX");
 397                         break;
 398                 case P2PSD_ACTION_ID_GAS_IRESP:
 399                         brcmf_dbg(TRACE, "%s P2P GAS Initial Response\n",
 400                                   (tx) ? "TX" : "RX");
 401                         break;
 402                 case P2PSD_ACTION_ID_GAS_CREQ:
 403                         brcmf_dbg(TRACE, "%s P2P GAS Comback Request\n",
 404                                   (tx) ? "TX" : "RX");
 405                         break;
 406                 case P2PSD_ACTION_ID_GAS_CRESP:
 407                         brcmf_dbg(TRACE, "%s P2P GAS Comback Response\n",
 408                                   (tx) ? "TX" : "RX");
 409                         break;
 410                 default:
 411                         brcmf_dbg(TRACE, "%s Unknown P2P GAS Frame\n",
 412                                   (tx) ? "TX" : "RX");
 413                         break;
 414                 }
 415         }
 416 }
 417
 418 #else
 419
 420 static void brcmf_p2p_print_actframe(bool tx, void *frame, u32 frame_len)
 421 {
 422 }
 423
 424 #endif
 425
 426
 427 /**
 428  * brcmf_p2p_set_firmware() - prepare firmware for peer-to-peer operation.
 429  *
 430  * @ifp: ifp to use for iovars (primary).
 431  * @p2p_mac: mac address to configure for p2p_da_override
 432  */
 433 static int brcmf_p2p_set_firmware(struct brcmf_if *ifp, u8 *p2p_mac)
 434 {
 435         s32 ret = 0;
 436
 437         brcmf_fil_cmd_int_set(ifp, BRCMF_C_DOWN, 1);
 438         brcmf_fil_iovar_int_set(ifp, "apsta", 1);
 439         brcmf_fil_cmd_int_set(ifp, BRCMF_C_UP, 1);
 440
 441         /* In case of COB type, firmware has default mac address
 442          * After Initializing firmware, we have to set current mac address to
 443          * firmware for P2P device address
 444          */
 445         ret = brcmf_fil_iovar_data_set(ifp, "p2p_da_override", p2p_mac,
 446                                        ETH_ALEN);
 447         if (ret)
 448                 brcmf_err("failed to update device address ret %d\n", ret);
 449
 450         return ret;
 451 }
 452
 453 /**
 454  * brcmf_p2p_generate_bss_mac() - derive mac addresses for P2P.
 455  *
 456  * @p2p: P2P specific data.
 457  * @dev_addr: optional device address.
 458  *
 459  * P2P needs mac addresses for P2P device and interface. If no device
 460  * address it specified, these are derived from the primary net device, ie.
 461  * the permanent ethernet address of the device.
 462  */
 463 static void brcmf_p2p_generate_bss_mac(struct brcmf_p2p_info *p2p, u8 *dev_addr)
 464 {
 465         struct brcmf_if *pri_ifp = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->ifp;
 466         bool local_admin = false;
 467
 468         if (!dev_addr || is_zero_ether_addr(dev_addr)) {
 469                 dev_addr = pri_ifp->mac_addr;
 470                 local_admin = true;
 471         }
 472
 473         /* Generate the P2P Device Address.  This consists of the device's
 474          * primary MAC address with the locally administered bit set.
 475          */
 476         memcpy(p2p->dev_addr, dev_addr, ETH_ALEN);
 477         if (local_admin)
 478                 p2p->dev_addr[0] |= 0x02;
 479
 480         /* Generate the P2P Interface Address.  If the discovery and connection
 481          * BSSCFGs need to simultaneously co-exist, then this address must be
 482          * different from the P2P Device Address, but also locally administered.
 483          */
 484         memcpy(p2p->int_addr, p2p->dev_addr, ETH_ALEN);
 485         p2p->int_addr[0] |= 0x02;
 486         p2p->int_addr[4] ^= 0x80;
 487 }
 488
 489 /**
 490  * brcmf_p2p_scan_is_p2p_request() - is cfg80211 scan request a P2P scan.
 491  *
 492  * @request: the scan request as received from cfg80211.
 493  *
 494  * returns true if one of the ssids in the request matches the
 495  * P2P wildcard ssid; otherwise returns false.
 496  */
 497 static bool brcmf_p2p_scan_is_p2p_request(struct cfg80211_scan_request *request)
 498 {
 499         struct cfg80211_ssid *ssids = request->ssids;
 500         int i;
 501
 502         for (i = 0; i < request->n_ssids; i++) {
 503                 if (ssids[i].ssid_len != BRCMF_P2P_WILDCARD_SSID_LEN)
 504                         continue;
 505
 506                 brcmf_dbg(INFO, "comparing ssid \"%s\"", ssids[i].ssid);
 507                 if (!memcmp(BRCMF_P2P_WILDCARD_SSID, ssids[i].ssid,
 508                             BRCMF_P2P_WILDCARD_SSID_LEN))
 509                         return true;
 510         }
 511         return false;
 512 }
 513
 514 /**
 515  * brcmf_p2p_set_discover_state - set discover state in firmware.
 516  *
 517  * @ifp: low-level interface object.
 518  * @state: discover state to set.
 519  * @chanspec: channel parameters (for state @WL_P2P_DISC_ST_LISTEN only).
 520  * @listen_ms: duration to listen (for state @WL_P2P_DISC_ST_LISTEN only).
 521  */
 522 static s32 brcmf_p2p_set_discover_state(struct brcmf_if *ifp, u8 state,
 523                                         u16 chanspec, u16 listen_ms)
 524 {
 525         struct brcmf_p2p_disc_st_le discover_state;
 526         s32 ret = 0;
 527         brcmf_dbg(TRACE, "enter\n");
 528
 529         discover_state.state = state;
 530         discover_state.chspec = cpu_to_le16(chanspec);
 531         discover_state.dwell = cpu_to_le16(listen_ms);
 532         ret = brcmf_fil_bsscfg_data_set(ifp, "p2p_state", &discover_state,
 533                                         sizeof(discover_state));
 534         return ret;
 535 }
 536
 537 /**
 538  * brcmf_p2p_deinit_discovery() - disable P2P device discovery.
 539  *
 540  * @p2p: P2P specific data.
 541  *
 542  * Resets the discovery state and disables it in firmware.
 543  */
 544 static s32 brcmf_p2p_deinit_discovery(struct brcmf_p2p_info *p2p)
 545 {
 546         struct brcmf_cfg80211_vif *vif;
 547
 548         brcmf_dbg(TRACE, "enter\n");
 549
 550         /* Set the discovery state to SCAN */
 551         vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif;
 552         (void)brcmf_p2p_set_discover_state(vif->ifp, WL_P2P_DISC_ST_SCAN, 0, 0);
 553
 554         /* Disable P2P discovery in the firmware */
 555         vif = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif;
 556         (void)brcmf_fil_iovar_int_set(vif->ifp, "p2p_disc", 0);
 557
 558         return 0;
 559 }
 560
 561 /**
 562  * brcmf_p2p_enable_discovery() - initialize and configure discovery.
 563  *
 564  * @p2p: P2P specific data.
 565  *
 566  * Initializes the discovery device and configure the virtual interface.
 567  */
 568 static int brcmf_p2p_enable_discovery(struct brcmf_p2p_info *p2p)
 569 {
 570         struct brcmf_cfg80211_vif *vif;
 571         s32 ret = 0;
 572
 573         brcmf_dbg(TRACE, "enter\n");
 574         vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif;
 575         if (!vif) {
 576                 brcmf_err("P2P config device not available\n");
 577                 ret = -EPERM;
 578                 goto exit;
 579         }
 580
 581         if (test_bit(BRCMF_P2P_STATUS_ENABLED, &p2p->status)) {
 582                 brcmf_dbg(INFO, "P2P config device already configured\n");
 583                 goto exit;
 584         }
 585
 586         /* Re-initialize P2P Discovery in the firmware */
 587         vif = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif;
 588         ret = brcmf_fil_iovar_int_set(vif->ifp, "p2p_disc", 1);
 589         if (ret < 0) {
 590                 brcmf_err("set p2p_disc error\n");
 591                 goto exit;
 592         }
 593         vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif;
 594         ret = brcmf_p2p_set_discover_state(vif->ifp, WL_P2P_DISC_ST_SCAN, 0, 0);
 595         if (ret < 0) {
 596                 brcmf_err("unable to set WL_P2P_DISC_ST_SCAN\n");
 597                 goto exit;
 598         }
 599
 600         /*
 601          * Set wsec to any non-zero value in the discovery bsscfg
 602          * to ensure our P2P probe responses have the privacy bit
 603          * set in the 802.11 WPA IE. Some peer devices may not
 604          * initiate WPS with us if this bit is not set.
 605          */
 606         ret = brcmf_fil_bsscfg_int_set(vif->ifp, "wsec", AES_ENABLED);
 607         if (ret < 0) {
 608                 brcmf_err("wsec error %d\n", ret);
 609                 goto exit;
 610         }
 611
 612         set_bit(BRCMF_P2P_STATUS_ENABLED, &p2p->status);
 613 exit:
 614         return ret;
 615 }
 616
 617 /**
 618  * brcmf_p2p_escan() - initiate a P2P scan.
 619  *
 620  * @p2p: P2P specific data.
 621  * @num_chans: number of channels to scan.
 622  * @chanspecs: channel parameters for @num_chans channels.
 623  * @search_state: P2P discover state to use.
 624  * @action: scan action to pass to firmware.
 625  * @bss_type: type of P2P bss.
 626  */
 627 static s32 brcmf_p2p_escan(struct brcmf_p2p_info *p2p, u32 num_chans,
 628                            u16 chanspecs[], s32 search_state, u16 action,
 629                            enum p2p_bss_type bss_type)
 630 {
 631         s32 ret = 0;
 632         s32 memsize = offsetof(struct brcmf_p2p_scan_le,
 633                                eparams.params_le.channel_list);
 634         s32 nprobes;
 635         s32 active;
 636         u32 i;
 637         u8 *memblk;
 638         struct brcmf_cfg80211_vif *vif;
 639         struct brcmf_p2p_scan_le *p2p_params;
 640         struct brcmf_scan_params_le *sparams;
 641         struct brcmf_ssid ssid;
 642
 643         memsize += num_chans * sizeof(__le16);
 644         memblk = kzalloc(memsize, GFP_KERNEL);
 645         if (!memblk)
 646                 return -ENOMEM;
 647
 648         vif = p2p->bss_idx[bss_type].vif;
 649         if (vif == NULL) {
 650                 brcmf_err("no vif for bss type %d\n", bss_type);
 651                 ret = -EINVAL;
 652                 goto exit;
 653         }
 654
 655         switch (search_state) {
 656         case WL_P2P_DISC_ST_SEARCH:
 657                 /*
 658                  * If we in SEARCH STATE, we don't need to set SSID explictly
 659                  * because dongle use P2P WILDCARD internally by default
 660                  */
 661                 /* use null ssid */
 662                 ssid.SSID_len = 0;
 663                 memset(ssid.SSID, 0, sizeof(ssid.SSID));
 664                 break;
 665         case WL_P2P_DISC_ST_SCAN:
 666                 /*
 667                  * wpa_supplicant has p2p_find command with type social or
 668                  * progressive. For progressive, we need to set the ssid to
 669                  * P2P WILDCARD because we just do broadcast scan unless
 670                  * setting SSID.
 671                  */
 672                 ssid.SSID_len = BRCMF_P2P_WILDCARD_SSID_LEN;
 673                 memcpy(ssid.SSID, BRCMF_P2P_WILDCARD_SSID, ssid.SSID_len);
 674                 break;
 675         default:
 676                 brcmf_err(" invalid search state %d\n", search_state);
 677                 ret = -EINVAL;
 678                 goto exit;
 679         }
 680
 681         brcmf_p2p_set_discover_state(vif->ifp, search_state, 0, 0);
 682
 683         /*
 684          * set p2p scan parameters.
 685          */
 686         p2p_params = (struct brcmf_p2p_scan_le *)memblk;
 687         p2p_params->type = 'E';
 688
 689         /* determine the scan engine parameters */
 690         sparams = &p2p_params->eparams.params_le;
 691         sparams->bss_type = DOT11_BSSTYPE_ANY;
 692         if (p2p->cfg->active_scan)
 693                 sparams->scan_type = 0;
 694         else
 695                 sparams->scan_type = 1;
 696
 697         memset(&sparams->bssid, 0xFF, ETH_ALEN);
 698         if (ssid.SSID_len)
 699                 memcpy(sparams->ssid_le.SSID, ssid.SSID, ssid.SSID_len);
 700         sparams->ssid_le.SSID_len = cpu_to_le32(ssid.SSID_len);
 701         sparams->home_time = cpu_to_le32(P2PAPI_SCAN_HOME_TIME_MS);
 702
 703         /*
 704          * SOCIAL_CHAN_CNT + 1 takes care of the Progressive scan
 705          * supported by the supplicant.
 706          */
 707         if (num_chans == SOCIAL_CHAN_CNT || num_chans == (SOCIAL_CHAN_CNT + 1))
 708                 active = P2PAPI_SCAN_SOCIAL_DWELL_TIME_MS;
 709         else if (num_chans == AF_PEER_SEARCH_CNT)
 710                 active = P2PAPI_SCAN_AF_SEARCH_DWELL_TIME_MS;
 711         else if (wl_get_vif_state_all(p2p->cfg, BRCMF_VIF_STATUS_CONNECTED))
 712                 active = -1;
 713         else
 714                 active = P2PAPI_SCAN_DWELL_TIME_MS;
 715
 716         /* Override scan params to find a peer for a connection */
 717         if (num_chans == 1) {
 718                 active = WL_SCAN_CONNECT_DWELL_TIME_MS;
 719                 /* WAR to sync with presence period of VSDB GO.
 720                  * send probe request more frequently
 721                  */
 722                 nprobes = active / WL_SCAN_JOIN_PROBE_INTERVAL_MS;
 723         } else {
 724                 nprobes = active / P2PAPI_SCAN_NPROBS_TIME_MS;
 725         }
 726
 727         if (nprobes <= 0)
 728                 nprobes = 1;
 729
 730         brcmf_dbg(INFO, "nprobes # %d, active_time %d\n", nprobes, active);
 731         sparams->active_time = cpu_to_le32(active);
 732         sparams->nprobes = cpu_to_le32(nprobes);
 733         sparams->passive_time = cpu_to_le32(-1);
 734         sparams->channel_num = cpu_to_le32(num_chans &
 735                                            BRCMF_SCAN_PARAMS_COUNT_MASK);
 736         for (i = 0; i < num_chans; i++)
 737                 sparams->channel_list[i] = cpu_to_le16(chanspecs[i]);
 738
 739         /* set the escan specific parameters */
 740         p2p_params->eparams.version = cpu_to_le32(BRCMF_ESCAN_REQ_VERSION);
 741         p2p_params->eparams.action =  cpu_to_le16(action);
 742         p2p_params->eparams.sync_id = cpu_to_le16(0x1234);
 743         /* perform p2p scan on primary device */
 744         ret = brcmf_fil_bsscfg_data_set(vif->ifp, "p2p_scan", memblk, memsize);
 745         if (!ret)
 746                 set_bit(BRCMF_SCAN_STATUS_BUSY, &p2p->cfg->scan_status);
 747 exit:
 748         kfree(memblk);
 749         return ret;
 750 }
 751
 752 /**
 753  * brcmf_p2p_run_escan() - escan callback for peer-to-peer.
 754  *
 755  * @cfg: driver private data for cfg80211 interface.
 756  * @ndev: net device for which scan is requested.
 757  * @request: scan request from cfg80211.
 758  * @action: scan action.
 759  *
 760  * Determines the P2P discovery state based to scan request parameters and
 761  * validates the channels in the request.
 762  */
 763 static s32 brcmf_p2p_run_escan(struct brcmf_cfg80211_info *cfg,
 764                                struct brcmf_if *ifp,
 765                                struct cfg80211_scan_request *request,
 766                                u16 action)
 767 {
 768         struct brcmf_p2p_info *p2p = &cfg->p2p;
 769         s32 err = 0;
 770         s32 search_state = WL_P2P_DISC_ST_SCAN;
 771         struct brcmf_cfg80211_vif *vif;
 772         struct net_device *dev = NULL;
 773         int i, num_nodfs = 0;
 774         u16 *chanspecs;
 775
 776         brcmf_dbg(TRACE, "enter\n");
 777
 778         if (!request) {
 779                 err = -EINVAL;
 780                 goto exit;
 781         }
 782
 783         if (request->n_channels) {
 784                 chanspecs = kcalloc(request->n_channels, sizeof(*chanspecs),
 785                                     GFP_KERNEL);
 786                 if (!chanspecs) {
 787                         err = -ENOMEM;
 788                         goto exit;
 789                 }
 790                 vif = p2p->bss_idx[P2PAPI_BSSCFG_CONNECTION].vif;
 791                 if (vif)
 792                         dev = vif->wdev.netdev;
 793                 if (request->n_channels == 3 &&
 794                     request->channels[0]->hw_value == SOCIAL_CHAN_1 &&
 795                     request->channels[1]->hw_value == SOCIAL_CHAN_2 &&
 796                     request->channels[2]->hw_value == SOCIAL_CHAN_3) {
 797                         /* SOCIAL CHANNELS 1, 6, 11 */
 798                         search_state = WL_P2P_DISC_ST_SEARCH;
 799                         brcmf_dbg(INFO, "P2P SEARCH PHASE START\n");
 800                 } else if (dev != NULL && vif->mode == WL_MODE_AP) {
 801                         /* If you are already a GO, then do SEARCH only */
 802                         brcmf_dbg(INFO, "Already a GO. Do SEARCH Only\n");
 803                         search_state = WL_P2P_DISC_ST_SEARCH;
 804                 } else {
 805                         brcmf_dbg(INFO, "P2P SCAN STATE START\n");
 806                 }
 807
 808                 /*
 809                  * no P2P scanning on passive or DFS channels.
 810                  */
 811                 for (i = 0; i < request->n_channels; i++) {
 812                         struct ieee80211_channel *chan = request->channels[i];
 813
 814                         if (chan->flags & (IEEE80211_CHAN_RADAR |
 815                                            IEEE80211_CHAN_NO_IR))
 816                                 continue;
 817
 818                         chanspecs[i] = channel_to_chanspec(&p2p->cfg->d11inf,
 819                                                            chan);
 820                         brcmf_dbg(INFO, "%d: chan=%d, channel spec=%x\n",
 821                                   num_nodfs, chan->hw_value, chanspecs[i]);
 822                         num_nodfs++;
 823                 }
 824                 err = brcmf_p2p_escan(p2p, num_nodfs, chanspecs, search_state,
 825                                       action, P2PAPI_BSSCFG_DEVICE);
 826                 kfree(chanspecs);
 827         }
 828 exit:
 829         if (err)
 830                 brcmf_err("error (%d)\n", err);
 831         return err;
 832 }
 833
 834
 835 /**
 836  * brcmf_p2p_find_listen_channel() - find listen channel in ie string.
 837  *
 838  * @ie: string of information elements.
 839  * @ie_len: length of string.
 840  *
 841  * Scan ie for p2p ie and look for attribute 6 channel. If available determine
 842  * channel and return it.
 843  */
 844 static s32 brcmf_p2p_find_listen_channel(const u8 *ie, u32 ie_len)
 845 {
 846         u8 channel_ie[5];
 847         s32 listen_channel;
 848         s32 err;
 849
 850         err = cfg80211_get_p2p_attr(ie, ie_len,
 851                                     IEEE80211_P2P_ATTR_LISTEN_CHANNEL,
 852                                     channel_ie, sizeof(channel_ie));
 853         if (err < 0)
 854                 return err;
 855
 856         /* listen channel subel length format:     */
 857         /* 3(country) + 1(op. class) + 1(chan num) */
 858         listen_channel = (s32)channel_ie[3 + 1];
 859
 860         if (listen_channel == SOCIAL_CHAN_1 ||
 861             listen_channel == SOCIAL_CHAN_2 ||
 862             listen_channel == SOCIAL_CHAN_3) {
 863                 brcmf_dbg(INFO, "Found my Listen Channel %d\n", listen_channel);
 864                 return listen_channel;
 865         }
 866
 867         return -EPERM;
 868 }
 869
 870
 871 /**
 872  * brcmf_p2p_scan_prep() - prepare scan based on request.
 873  *
 874  * @wiphy: wiphy device.
 875  * @request: scan request from cfg80211.
 876  * @vif: vif on which scan request is to be executed.
 877  *
 878  * Prepare the scan appropriately for type of scan requested. Overrides the
 879  * escan .run() callback for peer-to-peer scanning.
 880  */
 881 int brcmf_p2p_scan_prep(struct wiphy *wiphy,
 882                         struct cfg80211_scan_request *request,
 883                         struct brcmf_cfg80211_vif *vif)
 884 {
 885         struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
 886         struct brcmf_p2p_info *p2p = &cfg->p2p;
 887         int err = 0;
 888
 889         if (brcmf_p2p_scan_is_p2p_request(request)) {
 890                 /* find my listen channel */
 891                 err = brcmf_p2p_find_listen_channel(request->ie,
 892                                                     request->ie_len);
 893                 if (err < 0)
 894                         return err;
 895
 896                 p2p->afx_hdl.my_listen_chan = err;
 897
 898                 clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status);
 899                 brcmf_dbg(INFO, "P2P: GO_NEG_PHASE status cleared\n");
 900
 901                 err = brcmf_p2p_enable_discovery(p2p);
 902                 if (err)
 903                         return err;
 904
 905                 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif;
 906
 907                 /* override .run_escan() callback. */
 908                 cfg->escan_info.run = brcmf_p2p_run_escan;
 909         }
 910         err = brcmf_vif_set_mgmt_ie(vif, BRCMF_VNDR_IE_PRBREQ_FLAG,
 911                                     request->ie, request->ie_len);
 912         return err;
 913 }
 914
 915
 916 /**
 917  * brcmf_p2p_discover_listen() - set firmware to discover listen state.
 918  *
 919  * @p2p: p2p device.
 920  * @channel: channel nr for discover listen.
 921  * @duration: time in ms to stay on channel.
 922  *
 923  */
 924 static s32
 925 brcmf_p2p_discover_listen(struct brcmf_p2p_info *p2p, u16 channel, u32 duration)
 926 {
 927         struct brcmf_cfg80211_vif *vif;
 928         struct brcmu_chan ch;
 929         s32 err = 0;
 930
 931         vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif;
 932         if (!vif) {
 933                 brcmf_err("Discovery is not set, so we have nothing to do\n");
 934                 err = -EPERM;
 935                 goto exit;
 936         }
 937
 938         if (test_bit(BRCMF_P2P_STATUS_DISCOVER_LISTEN, &p2p->status)) {
 939                 brcmf_err("Previous LISTEN is not completed yet\n");
 940                 /* WAR: prevent cookie mismatch in wpa_supplicant return OK */
 941                 goto exit;
 942         }
 943
 944         ch.chnum = channel;
 945         ch.bw = BRCMU_CHAN_BW_20;
 946         p2p->cfg->d11inf.encchspec(&ch);
 947         err = brcmf_p2p_set_discover_state(vif->ifp, WL_P2P_DISC_ST_LISTEN,
 948                                            ch.chspec, (u16)duration);
 949         if (!err) {
 950                 set_bit(BRCMF_P2P_STATUS_DISCOVER_LISTEN, &p2p->status);
 951                 p2p->remain_on_channel_cookie++;
 952         }
 953 exit:
 954         return err;
 955 }
 956
 957
 958 /**
 959  * brcmf_p2p_remain_on_channel() - put device on channel and stay there.
 960  *
 961  * @wiphy: wiphy device.
 962  * @channel: channel to stay on.
 963  * @duration: time in ms to remain on channel.
 964  *
 965  */
 966 int brcmf_p2p_remain_on_channel(struct wiphy *wiphy, struct wireless_dev *wdev,
 967                                 struct ieee80211_channel *channel,
 968                                 unsigned int duration, u64 *cookie)
 969 {
 970         struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
 971         struct brcmf_p2p_info *p2p = &cfg->p2p;
 972         s32 err;
 973         u16 channel_nr;
 974
 975         channel_nr = ieee80211_frequency_to_channel(channel->center_freq);
 976         brcmf_dbg(TRACE, "Enter, channel: %d, duration ms (%d)\n", channel_nr,
 977                   duration);
 978
 979         err = brcmf_p2p_enable_discovery(p2p);
 980         if (err)
 981                 goto exit;
 982         err = brcmf_p2p_discover_listen(p2p, channel_nr, duration);
 983         if (err)
 984                 goto exit;
 985
 986         memcpy(&p2p->remain_on_channel, channel, sizeof(*channel));
 987         *cookie = p2p->remain_on_channel_cookie;
 988         cfg80211_ready_on_channel(wdev, *cookie, channel, duration, GFP_KERNEL);
 989
 990 exit:
 991         return err;
 992 }
 993
 994
 995 /**
 996  * brcmf_p2p_notify_listen_complete() - p2p listen has completed.
 997  *
 998  * @ifp: interfac control.
 999  * @e: event message. Not used, to make it usable for fweh event dispatcher.
1000  * @data: payload of message. Not used.
1001  *
1002  */
1003 int brcmf_p2p_notify_listen_complete(struct brcmf_if *ifp,
1004                                      const struct brcmf_event_msg *e,
1005                                      void *data)
1006 {
1007         struct brcmf_cfg80211_info *cfg = ifp->drvr->config;
1008         struct brcmf_p2p_info *p2p = &cfg->p2p;
1009
1010         brcmf_dbg(TRACE, "Enter\n");
1011         if (test_and_clear_bit(BRCMF_P2P_STATUS_DISCOVER_LISTEN,
1012                                &p2p->status)) {
1013                 if (test_and_clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_AF_LISTEN,
1014                                        &p2p->status)) {
1015                         clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME,
1016                                   &p2p->status);
1017                         brcmf_dbg(INFO, "Listen DONE, wake up wait_next_af\n");
1018                         complete(&p2p->wait_next_af);
1019                 }
1020
1021                 cfg80211_remain_on_channel_expired(&ifp->vif->wdev,
1022                                                    p2p->remain_on_channel_cookie,
1023                                                    &p2p->remain_on_channel,
1024                                                    GFP_KERNEL);
1025         }
1026         return 0;
1027 }
1028
1029
1030 /**
1031  * brcmf_p2p_cancel_remain_on_channel() - cancel p2p listen state.
1032  *
1033  * @ifp: interfac control.
1034  *
1035  */
1036 void brcmf_p2p_cancel_remain_on_channel(struct brcmf_if *ifp)
1037 {
1038         if (!ifp)
1039                 return;
1040         brcmf_p2p_set_discover_state(ifp, WL_P2P_DISC_ST_SCAN, 0, 0);
1041         brcmf_p2p_notify_listen_complete(ifp, NULL, NULL);
1042 }
1043
1044
1045 /**
1046  * brcmf_p2p_act_frm_search() - search function for action frame.
1047  *
1048  * @p2p: p2p device.
1049  * channel: channel on which action frame is to be trasmitted.
1050  *
1051  * search function to reach at common channel to send action frame. When
1052  * channel is 0 then all social channels will be used to send af
1053  */
1054 static s32 brcmf_p2p_act_frm_search(struct brcmf_p2p_info *p2p, u16 channel)
1055 {
1056         s32 err;
1057         u32 channel_cnt;
1058         u16 *default_chan_list;
1059         u32 i;
1060         struct brcmu_chan ch;
1061
1062         brcmf_dbg(TRACE, "Enter\n");
1063
1064         if (channel)
1065                 channel_cnt = AF_PEER_SEARCH_CNT;
1066         else
1067                 channel_cnt = SOCIAL_CHAN_CNT;
1068         default_chan_list = kzalloc(channel_cnt * sizeof(*default_chan_list),
1069                                     GFP_KERNEL);
1070         if (default_chan_list == NULL) {
1071                 brcmf_err("channel list allocation failed\n");
1072                 err = -ENOMEM;
1073                 goto exit;
1074         }
1075         ch.bw = BRCMU_CHAN_BW_20;
1076         if (channel) {
1077                 ch.chnum = channel;
1078                 p2p->cfg->d11inf.encchspec(&ch);
1079                 /* insert same channel to the chan_list */
1080                 for (i = 0; i < channel_cnt; i++)
1081                         default_chan_list[i] = ch.chspec;
1082         } else {
1083                 ch.chnum = SOCIAL_CHAN_1;
1084                 p2p->cfg->d11inf.encchspec(&ch);
1085                 default_chan_list[0] = ch.chspec;
1086                 ch.chnum = SOCIAL_CHAN_2;
1087                 p2p->cfg->d11inf.encchspec(&ch);
1088                 default_chan_list[1] = ch.chspec;
1089                 ch.chnum = SOCIAL_CHAN_3;
1090                 p2p->cfg->d11inf.encchspec(&ch);
1091                 default_chan_list[2] = ch.chspec;
1092         }
1093         err = brcmf_p2p_escan(p2p, channel_cnt, default_chan_list,
1094                               WL_P2P_DISC_ST_SEARCH, WL_ESCAN_ACTION_START,
1095                               P2PAPI_BSSCFG_DEVICE);
1096         kfree(default_chan_list);
1097 exit:
1098         return err;
1099 }
1100
1101
1102 /**
1103  * brcmf_p2p_afx_handler() - afx worker thread.
1104  *
1105  * @work:
1106  *
1107  */
1108 static void brcmf_p2p_afx_handler(struct work_struct *work)
1109 {
1110         struct afx_hdl *afx_hdl = container_of(work, struct afx_hdl, afx_work);
1111         struct brcmf_p2p_info *p2p = container_of(afx_hdl,
1112                                                   struct brcmf_p2p_info,
1113                                                   afx_hdl);
1114         s32 err;
1115
1116         if (!afx_hdl->is_active)
1117                 return;
1118
1119         if (afx_hdl->is_listen && afx_hdl->my_listen_chan)
1120                 /* 100ms ~ 300ms */
1121                 err = brcmf_p2p_discover_listen(p2p, afx_hdl->my_listen_chan,
1122                                                 100 * (1 + prandom_u32() % 3));
1123         else
1124                 err = brcmf_p2p_act_frm_search(p2p, afx_hdl->peer_listen_chan);
1125
1126         if (err) {
1127                 brcmf_err("ERROR occurred! value is (%d)\n", err);
1128                 if (test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL,
1129                              &p2p->status))
1130                         complete(&afx_hdl->act_frm_scan);
1131         }
1132 }
1133
1134
1135 /**
1136  * brcmf_p2p_af_searching_channel() - search channel.
1137  *
1138  * @p2p: p2p device info struct.
1139  *
1140  */
1141 static s32 brcmf_p2p_af_searching_channel(struct brcmf_p2p_info *p2p)
1142 {
1143         struct afx_hdl *afx_hdl = &p2p->afx_hdl;
1144         struct brcmf_cfg80211_vif *pri_vif;
1145         unsigned long duration;
1146         s32 retry;
1147
1148         brcmf_dbg(TRACE, "Enter\n");
1149
1150         pri_vif = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif;
1151
1152         reinit_completion(&afx_hdl->act_frm_scan);
1153         set_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status);
1154         afx_hdl->is_active = true;
1155         afx_hdl->peer_chan = P2P_INVALID_CHANNEL;
1156
1157         /* Loop to wait until we find a peer's channel or the
1158          * pending action frame tx is cancelled.
1159          */
1160         retry = 0;
1161         duration = msecs_to_jiffies(P2P_AF_FRM_SCAN_MAX_WAIT);
1162         while ((retry < P2P_CHANNEL_SYNC_RETRY) &&
1163                (afx_hdl->peer_chan == P2P_INVALID_CHANNEL)) {
1164                 afx_hdl->is_listen = false;
1165                 brcmf_dbg(TRACE, "Scheduling action frame for sending.. (%d)\n",
1166                           retry);
1167                 /* search peer on peer's listen channel */
1168                 schedule_work(&afx_hdl->afx_work);
1169                 wait_for_completion_timeout(&afx_hdl->act_frm_scan, duration);
1170                 if ((afx_hdl->peer_chan != P2P_INVALID_CHANNEL) ||
1171                     (!test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL,
1172                                &p2p->status)))
1173                         break;
1174
1175                 if (afx_hdl->my_listen_chan) {
1176                         brcmf_dbg(TRACE, "Scheduling listen peer, channel=%d\n",
1177                                   afx_hdl->my_listen_chan);
1178                         /* listen on my listen channel */
1179                         afx_hdl->is_listen = true;
1180                         schedule_work(&afx_hdl->afx_work);
1181                         wait_for_completion_timeout(&afx_hdl->act_frm_scan,
1182                                                     duration);
1183                 }
1184                 if ((afx_hdl->peer_chan != P2P_INVALID_CHANNEL) ||
1185                     (!test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL,
1186                                &p2p->status)))
1187                         break;
1188                 retry++;
1189
1190                 /* if sta is connected or connecting, sleep for a while before
1191                  * retry af tx or finding a peer
1192                  */
1193                 if (test_bit(BRCMF_VIF_STATUS_CONNECTED, &pri_vif->sme_state) ||
1194                     test_bit(BRCMF_VIF_STATUS_CONNECTING, &pri_vif->sme_state))
1195                         msleep(P2P_DEFAULT_SLEEP_TIME_VSDB);
1196         }
1197
1198         brcmf_dbg(TRACE, "Completed search/listen peer_chan=%d\n",
1199                   afx_hdl->peer_chan);
1200         afx_hdl->is_active = false;
1201
1202         clear_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status);
1203
1204         return afx_hdl->peer_chan;
1205 }
1206
1207
1208 /**
1209  * brcmf_p2p_scan_finding_common_channel() - was escan used for finding channel
1210  *
1211  * @cfg: common configuration struct.
1212  * @bi: bss info struct, result from scan.
1213  *
1214  */
1215 bool brcmf_p2p_scan_finding_common_channel(struct brcmf_cfg80211_info *cfg,
1216                                            struct brcmf_bss_info_le *bi)
1217
1218 {
1219         struct brcmf_p2p_info *p2p = &cfg->p2p;
1220         struct afx_hdl *afx_hdl = &p2p->afx_hdl;
1221         struct brcmu_chan ch;
1222         u8 *ie;
1223         s32 err;
1224         u8 p2p_dev_addr[ETH_ALEN];
1225
1226         if (!test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status))
1227                 return false;
1228
1229         if (bi == NULL) {
1230                 brcmf_dbg(TRACE, "ACTION FRAME SCAN Done\n");
1231                 if (afx_hdl->peer_chan == P2P_INVALID_CHANNEL)
1232                         complete(&afx_hdl->act_frm_scan);
1233                 return true;
1234         }
1235
1236         ie = ((u8 *)bi) + le16_to_cpu(bi->ie_offset);
1237         memset(p2p_dev_addr, 0, sizeof(p2p_dev_addr));
1238         err = cfg80211_get_p2p_attr(ie, le32_to_cpu(bi->ie_length),
1239                                     IEEE80211_P2P_ATTR_DEVICE_INFO,
1240                                     p2p_dev_addr, sizeof(p2p_dev_addr));
1241         if (err < 0)
1242                 err = cfg80211_get_p2p_attr(ie, le32_to_cpu(bi->ie_length),
1243                                             IEEE80211_P2P_ATTR_DEVICE_ID,
1244                                             p2p_dev_addr, sizeof(p2p_dev_addr));
1245         if ((err >= 0) &&
1246             (!memcmp(p2p_dev_addr, afx_hdl->tx_dst_addr, ETH_ALEN))) {
1247                 if (!bi->ctl_ch) {
1248                         ch.chspec = le16_to_cpu(bi->chanspec);
1249                         cfg->d11inf.decchspec(&ch);
1250                         bi->ctl_ch = ch.chnum;
1251                 }
1252                 afx_hdl->peer_chan = bi->ctl_ch;
1253                 brcmf_dbg(TRACE, "ACTION FRAME SCAN : Peer %pM found, channel : %d\n",
1254                           afx_hdl->tx_dst_addr, afx_hdl->peer_chan);
1255                 complete(&afx_hdl->act_frm_scan);
1256         }
1257         return true;
1258 }
1259
1260 /**
1261  * brcmf_p2p_stop_wait_next_action_frame() - finish scan if af tx complete.
1262  *
1263  * @cfg: common configuration struct.
1264  *
1265  */
1266 static void
1267 brcmf_p2p_stop_wait_next_action_frame(struct brcmf_cfg80211_info *cfg)
1268 {
1269         struct brcmf_p2p_info *p2p = &cfg->p2p;
1270         struct brcmf_if *ifp = cfg->escan_info.ifp;
1271
1272         if (test_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status) &&
1273             (test_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status) ||
1274              test_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status))) {
1275                 brcmf_dbg(TRACE, "*** Wake UP ** abort actframe iovar\n");
1276                 /* if channel is not zero, "actfame" uses off channel scan.
1277                  * So abort scan for off channel completion.
1278                  */
1279                 if (p2p->af_sent_channel)
1280                         brcmf_notify_escan_complete(cfg, ifp, true, true);
1281         } else if (test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_AF_LISTEN,
1282                             &p2p->status)) {
1283                 brcmf_dbg(TRACE, "*** Wake UP ** abort listen for next af frame\n");
1284                 /* So abort scan to cancel listen */
1285                 brcmf_notify_escan_complete(cfg, ifp, true, true);
1286         }
1287 }
1288
1289
1290 /**
1291  * brcmf_p2p_gon_req_collision() - Check if go negotiaton collission
1292  *
1293  * @p2p: p2p device info struct.
1294  *
1295  * return true if recevied action frame is to be dropped.
1296  */
1297 static bool
1298 brcmf_p2p_gon_req_collision(struct brcmf_p2p_info *p2p, u8 *mac)
1299 {
1300         struct brcmf_cfg80211_info *cfg = p2p->cfg;
1301         struct brcmf_if *ifp;
1302
1303         brcmf_dbg(TRACE, "Enter\n");
1304
1305         if (!test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status) ||
1306             !p2p->gon_req_action)
1307                 return false;
1308
1309         brcmf_dbg(TRACE, "GO Negotiation Request COLLISION !!!\n");
1310         /* if sa(peer) addr is less than da(my) addr, then this device
1311          * process peer's gon request and block to send gon req.
1312          * if not (sa addr > da addr),
1313          * this device will process gon request and drop gon req of peer.
1314          */
1315         ifp = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif->ifp;
1316         if (memcmp(mac, ifp->mac_addr, ETH_ALEN) < 0) {
1317                 brcmf_dbg(INFO, "Block transmit gon req !!!\n");
1318                 p2p->block_gon_req_tx = true;
1319                 /* if we are finding a common channel for sending af,
1320                  * do not scan more to block to send current gon req
1321                  */
1322                 if (test_and_clear_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL,
1323                                        &p2p->status))
1324                         complete(&p2p->afx_hdl.act_frm_scan);
1325                 if (test_and_clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME,
1326                                        &p2p->status))
1327                         brcmf_p2p_stop_wait_next_action_frame(cfg);
1328                 return false;
1329         }
1330
1331         /* drop gon request of peer to process gon request by this device. */
1332         brcmf_dbg(INFO, "Drop received gon req !!!\n");
1333
1334         return true;
1335 }
1336
1337
1338 /**
1339  * brcmf_p2p_notify_action_frame_rx() - received action frame.
1340  *
1341  * @ifp: interfac control.
1342  * @e: event message. Not used, to make it usable for fweh event dispatcher.
1343  * @data: payload of message, containing action frame data.
1344  *
1345  */
1346 int brcmf_p2p_notify_action_frame_rx(struct brcmf_if *ifp,
1347                                      const struct brcmf_event_msg *e,
1348                                      void *data)
1349 {
1350         struct brcmf_cfg80211_info *cfg = ifp->drvr->config;
1351         struct brcmf_p2p_info *p2p = &cfg->p2p;
1352         struct afx_hdl *afx_hdl = &p2p->afx_hdl;
1353         struct wireless_dev *wdev;
1354         u32 mgmt_frame_len = e->datalen - sizeof(struct brcmf_rx_mgmt_data);
1355         struct brcmf_rx_mgmt_data *rxframe = (struct brcmf_rx_mgmt_data *)data;
1356         u8 *frame = (u8 *)(rxframe + 1);
1357         struct brcmf_p2p_pub_act_frame *act_frm;
1358         struct brcmf_p2psd_gas_pub_act_frame *sd_act_frm;
1359         struct brcmu_chan ch;
1360         struct ieee80211_mgmt *mgmt_frame;
1361         s32 freq;
1362         u16 mgmt_type;
1363         u8 action;
1364
1365         ch.chspec = be16_to_cpu(rxframe->chanspec);
1366         cfg->d11inf.decchspec(&ch);
1367         /* Check if wpa_supplicant has registered for this frame */
1368         brcmf_dbg(INFO, "ifp->vif->mgmt_rx_reg %04x\n", ifp->vif->mgmt_rx_reg);
1369         mgmt_type = (IEEE80211_STYPE_ACTION & IEEE80211_FCTL_STYPE) >> 4;
1370         if ((ifp->vif->mgmt_rx_reg & BIT(mgmt_type)) == 0)
1371                 return 0;
1372
1373         brcmf_p2p_print_actframe(false, frame, mgmt_frame_len);
1374
1375         action = P2P_PAF_SUBTYPE_INVALID;
1376         if (brcmf_p2p_is_pub_action(frame, mgmt_frame_len)) {
1377                 act_frm = (struct brcmf_p2p_pub_act_frame *)frame;
1378                 action = act_frm->subtype;
1379                 if ((action == P2P_PAF_GON_REQ) &&
1380                     (brcmf_p2p_gon_req_collision(p2p, (u8 *)e->addr))) {
1381                         if (test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL,
1382                                      &p2p->status) &&
1383                             (memcmp(afx_hdl->tx_dst_addr, e->addr,
1384                                     ETH_ALEN) == 0)) {
1385                                 afx_hdl->peer_chan = ch.chnum;
1386                                 brcmf_dbg(INFO, "GON request: Peer found, channel=%d\n",
1387                                           afx_hdl->peer_chan);
1388                                 complete(&afx_hdl->act_frm_scan);
1389                         }
1390                         return 0;
1391                 }
1392                 /* After complete GO Negotiation, roll back to mpc mode */
1393                 if ((action == P2P_PAF_GON_CONF) ||
1394                     (action == P2P_PAF_PROVDIS_RSP))
1395                         brcmf_set_mpc(ifp, 1);
1396                 if (action == P2P_PAF_GON_CONF) {
1397                         brcmf_dbg(TRACE, "P2P: GO_NEG_PHASE status cleared\n");
1398                         clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status);
1399                 }
1400         } else if (brcmf_p2p_is_gas_action(frame, mgmt_frame_len)) {
1401                 sd_act_frm = (struct brcmf_p2psd_gas_pub_act_frame *)frame;
1402                 action = sd_act_frm->action;
1403         }
1404
1405         if (test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status) &&
1406             (p2p->next_af_subtype == action)) {
1407                 brcmf_dbg(TRACE, "We got a right next frame! (%d)\n", action);
1408                 clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME,
1409                           &p2p->status);
1410                 /* Stop waiting for next AF. */
1411                 brcmf_p2p_stop_wait_next_action_frame(cfg);
1412         }
1413
1414         mgmt_frame = kzalloc(offsetof(struct ieee80211_mgmt, u) +
1415                              mgmt_frame_len, GFP_KERNEL);
1416         if (!mgmt_frame) {
1417                 brcmf_err("No memory available for action frame\n");
1418                 return -ENOMEM;
1419         }
1420         memcpy(mgmt_frame->da, ifp->mac_addr, ETH_ALEN);
1421         brcmf_fil_cmd_data_get(ifp, BRCMF_C_GET_BSSID, mgmt_frame->bssid,
1422                                ETH_ALEN);
1423         memcpy(mgmt_frame->sa, e->addr, ETH_ALEN);
1424         mgmt_frame->frame_control = cpu_to_le16(IEEE80211_STYPE_ACTION);
1425         memcpy(&mgmt_frame->u, frame, mgmt_frame_len);
1426         mgmt_frame_len += offsetof(struct ieee80211_mgmt, u);
1427
1428         freq = ieee80211_channel_to_frequency(ch.chnum,
1429                                               ch.band == BRCMU_CHAN_BAND_2G ?
1430                                               IEEE80211_BAND_2GHZ :
1431                                               IEEE80211_BAND_5GHZ);
1432
1433         wdev = &ifp->vif->wdev;
1434         cfg80211_rx_mgmt(wdev, freq, 0, (u8 *)mgmt_frame, mgmt_frame_len, 0,
1435                          GFP_ATOMIC);
1436
1437         kfree(mgmt_frame);
1438         return 0;
1439 }
1440
1441
1442 /**
1443  * brcmf_p2p_notify_action_tx_complete() - transmit action frame complete
1444  *
1445  * @ifp: interfac control.
1446  * @e: event message. Not used, to make it usable for fweh event dispatcher.
1447  * @data: not used.
1448  *
1449  */
1450 int brcmf_p2p_notify_action_tx_complete(struct brcmf_if *ifp,
1451                                         const struct brcmf_event_msg *e,
1452                                         void *data)
1453 {
1454         struct brcmf_cfg80211_info *cfg = ifp->drvr->config;
1455         struct brcmf_p2p_info *p2p = &cfg->p2p;
1456
1457         brcmf_dbg(INFO, "Enter: event %s, status=%d\n",
1458                   e->event_code == BRCMF_E_ACTION_FRAME_OFF_CHAN_COMPLETE ?
1459                   "ACTION_FRAME_OFF_CHAN_COMPLETE" : "ACTION_FRAME_COMPLETE",
1460                   e->status);
1461
1462         if (!test_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status))
1463                 return 0;
1464
1465         if (e->event_code == BRCMF_E_ACTION_FRAME_COMPLETE) {
1466                 if (e->status == BRCMF_E_STATUS_SUCCESS)
1467                         set_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED,
1468                                 &p2p->status);
1469                 else {
1470                         set_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status);
1471                         /* If there is no ack, we don't need to wait for
1472                          * WLC_E_ACTION_FRAME_OFFCHAN_COMPLETE event
1473                          */
1474                         brcmf_p2p_stop_wait_next_action_frame(cfg);
1475                 }
1476
1477         } else {
1478                 complete(&p2p->send_af_done);
1479         }
1480         return 0;
1481 }
1482
1483
1484 /**
1485  * brcmf_p2p_tx_action_frame() - send action frame over fil.
1486  *
1487  * @p2p: p2p info struct for vif.
1488  * @af_params: action frame data/info.
1489  *
1490  * Send an action frame immediately without doing channel synchronization.
1491  *
1492  * This function waits for a completion event before returning.
1493  * The WLC_E_ACTION_FRAME_COMPLETE event will be received when the action
1494  * frame is transmitted.
1495  */
1496 static s32 brcmf_p2p_tx_action_frame(struct brcmf_p2p_info *p2p,
1497                                      struct brcmf_fil_af_params_le *af_params)
1498 {
1499         struct brcmf_cfg80211_vif *vif;
1500         s32 err = 0;
1501         s32 timeout = 0;
1502
1503         brcmf_dbg(TRACE, "Enter\n");
1504
1505         reinit_completion(&p2p->send_af_done);
1506         clear_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status);
1507         clear_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status);
1508
1509         vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif;
1510         err = brcmf_fil_bsscfg_data_set(vif->ifp, "actframe", af_params,
1511                                         sizeof(*af_params));
1512         if (err) {
1513                 brcmf_err(" sending action frame has failed\n");
1514                 goto exit;
1515         }
1516
1517         p2p->af_sent_channel = le32_to_cpu(af_params->channel);
1518         p2p->af_tx_sent_jiffies = jiffies;
1519
1520         timeout = wait_for_completion_timeout(&p2p->send_af_done,
1521                                         msecs_to_jiffies(P2P_AF_MAX_WAIT_TIME));
1522
1523         if (test_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status)) {
1524                 brcmf_dbg(TRACE, "TX action frame operation is success\n");
1525         } else {
1526                 err = -EIO;
1527                 brcmf_dbg(TRACE, "TX action frame operation has failed\n");
1528         }
1529         /* clear status bit for action tx */
1530         clear_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status);
1531         clear_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status);
1532
1533 exit:
1534         return err;
1535 }
1536
1537
1538 /**
1539  * brcmf_p2p_pub_af_tx() - public action frame tx routine.
1540  *
1541  * @cfg: driver private data for cfg80211 interface.
1542  * @af_params: action frame data/info.
1543  * @config_af_params: configuration data for action frame.
1544  *
1545  * routine which transmits ation frame public type.
1546  */
1547 static s32 brcmf_p2p_pub_af_tx(struct brcmf_cfg80211_info *cfg,
1548                                struct brcmf_fil_af_params_le *af_params,
1549                                struct brcmf_config_af_params *config_af_params)
1550 {
1551         struct brcmf_p2p_info *p2p = &cfg->p2p;
1552         struct brcmf_fil_action_frame_le *action_frame;
1553         struct brcmf_p2p_pub_act_frame *act_frm;
1554         s32 err = 0;
1555         u16 ie_len;
1556
1557         action_frame = &af_params->action_frame;
1558         act_frm = (struct brcmf_p2p_pub_act_frame *)(action_frame->data);
1559
1560         config_af_params->extra_listen = true;
1561
1562         switch (act_frm->subtype) {
1563         case P2P_PAF_GON_REQ:
1564                 brcmf_dbg(TRACE, "P2P: GO_NEG_PHASE status set\n");
1565                 set_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status);
1566                 config_af_params->mpc_onoff = 0;
1567                 config_af_params->search_channel = true;
1568                 p2p->next_af_subtype = act_frm->subtype + 1;
1569                 p2p->gon_req_action = true;
1570                 /* increase dwell time to wait for RESP frame */
1571                 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME);
1572                 break;
1573         case P2P_PAF_GON_RSP:
1574                 p2p->next_af_subtype = act_frm->subtype + 1;
1575                 /* increase dwell time to wait for CONF frame */
1576                 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME);
1577                 break;
1578         case P2P_PAF_GON_CONF:
1579                 /* If we reached till GO Neg confirmation reset the filter */
1580                 brcmf_dbg(TRACE, "P2P: GO_NEG_PHASE status cleared\n");
1581                 clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status);
1582                 /* turn on mpc again if go nego is done */
1583                 config_af_params->mpc_onoff = 1;
1584                 /* minimize dwell time */
1585                 af_params->dwell_time = cpu_to_le32(P2P_AF_MIN_DWELL_TIME);
1586                 config_af_params->extra_listen = false;
1587                 break;
1588         case P2P_PAF_INVITE_REQ:
1589                 config_af_params->search_channel = true;
1590                 p2p->next_af_subtype = act_frm->subtype + 1;
1591                 /* increase dwell time */
1592                 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME);
1593                 break;
1594         case P2P_PAF_INVITE_RSP:
1595                 /* minimize dwell time */
1596                 af_params->dwell_time = cpu_to_le32(P2P_AF_MIN_DWELL_TIME);
1597                 config_af_params->extra_listen = false;
1598                 break;
1599         case P2P_PAF_DEVDIS_REQ:
1600                 config_af_params->search_channel = true;
1601                 p2p->next_af_subtype = act_frm->subtype + 1;
1602                 /* maximize dwell time to wait for RESP frame */
1603                 af_params->dwell_time = cpu_to_le32(P2P_AF_LONG_DWELL_TIME);
1604                 break;
1605         case P2P_PAF_DEVDIS_RSP:
1606                 /* minimize dwell time */
1607                 af_params->dwell_time = cpu_to_le32(P2P_AF_MIN_DWELL_TIME);
1608                 config_af_params->extra_listen = false;
1609                 break;
1610         case P2P_PAF_PROVDIS_REQ:
1611                 ie_len = le16_to_cpu(action_frame->len) -
1612                          offsetof(struct brcmf_p2p_pub_act_frame, elts);
1613                 if (cfg80211_get_p2p_attr(&act_frm->elts[0], ie_len,
1614                                           IEEE80211_P2P_ATTR_GROUP_ID,
1615                                           NULL, 0) < 0)
1616                         config_af_params->search_channel = true;
1617                 config_af_params->mpc_onoff = 0;
1618                 p2p->next_af_subtype = act_frm->subtype + 1;
1619                 /* increase dwell time to wait for RESP frame */
1620                 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME);
1621                 break;
1622         case P2P_PAF_PROVDIS_RSP:
1623                 /* wpa_supplicant send go nego req right after prov disc */
1624                 p2p->next_af_subtype = P2P_PAF_GON_REQ;
1625                 /* increase dwell time to MED level */
1626                 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME);
1627                 config_af_params->extra_listen = false;
1628                 break;
1629         default:
1630                 brcmf_err("Unknown p2p pub act frame subtype: %d\n",
1631                           act_frm->subtype);
1632                 err = -EINVAL;
1633         }
1634         return err;
1635 }
1636
1637 /**
1638  * brcmf_p2p_send_action_frame() - send action frame .
1639  *
1640  * @cfg: driver private data for cfg80211 interface.
1641  * @ndev: net device to transmit on.
1642  * @af_params: configuration data for action frame.
1643  */
1644 bool brcmf_p2p_send_action_frame(struct brcmf_cfg80211_info *cfg,
1645                                  struct net_device *ndev,
1646                                  struct brcmf_fil_af_params_le *af_params)
1647 {
1648         struct brcmf_p2p_info *p2p = &cfg->p2p;
1649         struct brcmf_if *ifp = netdev_priv(ndev);
1650         struct brcmf_fil_action_frame_le *action_frame;
1651         struct brcmf_config_af_params config_af_params;
1652         struct afx_hdl *afx_hdl = &p2p->afx_hdl;
1653         u16 action_frame_len;
1654         bool ack = false;
1655         u8 category;
1656         u8 action;
1657         s32 tx_retry;
1658         s32 extra_listen_time;
1659         uint delta_ms;
1660
1661         action_frame = &af_params->action_frame;
1662         action_frame_len = le16_to_cpu(action_frame->len);
1663
1664         brcmf_p2p_print_actframe(true, action_frame->data, action_frame_len);
1665
1666         /* Add the default dwell time. Dwell time to stay off-channel */
1667         /* to wait for a response action frame after transmitting an  */
1668         /* GO Negotiation action frame                                */
1669         af_params->dwell_time = cpu_to_le32(P2P_AF_DWELL_TIME);
1670
1671         category = action_frame->data[DOT11_ACTION_CAT_OFF];
1672         action = action_frame->data[DOT11_ACTION_ACT_OFF];
1673
1674         /* initialize variables */
1675         p2p->next_af_subtype = P2P_PAF_SUBTYPE_INVALID;
1676         p2p->gon_req_action = false;
1677
1678         /* config parameters */
1679         config_af_params.mpc_onoff = -1;
1680         config_af_params.search_channel = false;
1681         config_af_params.extra_listen = false;
1682
1683         if (brcmf_p2p_is_pub_action(action_frame->data, action_frame_len)) {
1684                 /* p2p public action frame process */
1685                 if (brcmf_p2p_pub_af_tx(cfg, af_params, &config_af_params)) {
1686                         /* Just send unknown subtype frame with */
1687                         /* default parameters.                  */
1688                         brcmf_err("P2P Public action frame, unknown subtype.\n");
1689                 }
1690         } else if (brcmf_p2p_is_gas_action(action_frame->data,
1691                                            action_frame_len)) {
1692                 /* service discovery process */
1693                 if (action == P2PSD_ACTION_ID_GAS_IREQ ||
1694                     action == P2PSD_ACTION_ID_GAS_CREQ) {
1695                         /* configure service discovery query frame */
1696                         config_af_params.search_channel = true;
1697
1698                         /* save next af suptype to cancel */
1699                         /* remaining dwell time           */
1700                         p2p->next_af_subtype = action + 1;
1701
1702                         af_params->dwell_time =
1703                                 cpu_to_le32(P2P_AF_MED_DWELL_TIME);
1704                 } else if (action == P2PSD_ACTION_ID_GAS_IRESP ||
1705                            action == P2PSD_ACTION_ID_GAS_CRESP) {
1706                         /* configure service discovery response frame */
1707                         af_params->dwell_time =
1708                                 cpu_to_le32(P2P_AF_MIN_DWELL_TIME);
1709                 } else {
1710                         brcmf_err("Unknown action type: %d\n", action);
1711                         goto exit;
1712                 }
1713         } else if (brcmf_p2p_is_p2p_action(action_frame->data,
1714                                            action_frame_len)) {
1715                 /* do not configure anything. it will be */
1716                 /* sent with a default configuration     */
1717         } else {
1718                 brcmf_err("Unknown Frame: category 0x%x, action 0x%x\n",
1719                           category, action);
1720                 return false;
1721         }
1722
1723         /* if connecting on primary iface, sleep for a while before sending
1724          * af tx for VSDB
1725          */
1726         if (test_bit(BRCMF_VIF_STATUS_CONNECTING,
1727                      &p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->sme_state))
1728                 msleep(50);
1729
1730         /* if scan is ongoing, abort current scan. */
1731         if (test_bit(BRCMF_SCAN_STATUS_BUSY, &cfg->scan_status))
1732                 brcmf_abort_scanning(cfg);
1733
1734         memcpy(afx_hdl->tx_dst_addr, action_frame->da, ETH_ALEN);
1735
1736         /* To make sure to send successfully action frame, turn off mpc */
1737         if (config_af_params.mpc_onoff == 0)
1738                 brcmf_set_mpc(ifp, 0);
1739
1740         /* set status and destination address before sending af */
1741         if (p2p->next_af_subtype != P2P_PAF_SUBTYPE_INVALID) {
1742                 /* set status to cancel the remained dwell time in rx process */
1743                 set_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status);
1744         }
1745
1746         p2p->af_sent_channel = 0;
1747         set_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status);
1748         /* validate channel and p2p ies */
1749         if (config_af_params.search_channel &&
1750             IS_P2P_SOCIAL_CHANNEL(le32_to_cpu(af_params->channel)) &&
1751             p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif->saved_ie.probe_req_ie_len) {
1752                 afx_hdl = &p2p->afx_hdl;
1753                 afx_hdl->peer_listen_chan = le32_to_cpu(af_params->channel);
1754
1755                 if (brcmf_p2p_af_searching_channel(p2p) ==
1756                                                         P2P_INVALID_CHANNEL) {
1757                         brcmf_err("Couldn't find peer's channel.\n");
1758                         goto exit;
1759                 }
1760
1761                 /* Abort scan even for VSDB scenarios. Scan gets aborted in
1762                  * firmware but after the check of piggyback algorithm. To take
1763                  * care of current piggback algo, lets abort the scan here
1764                  * itself.
1765                  */
1766                 brcmf_notify_escan_complete(cfg, ifp, true, true);
1767
1768                 /* update channel */
1769                 af_params->channel = cpu_to_le32(afx_hdl->peer_chan);
1770         }
1771
1772         tx_retry = 0;
1773         while (!p2p->block_gon_req_tx &&
1774                (ack == false) && (tx_retry < P2P_AF_TX_MAX_RETRY)) {
1775                 ack = !brcmf_p2p_tx_action_frame(p2p, af_params);
1776                 tx_retry++;
1777         }
1778         if (ack == false) {
1779                 brcmf_err("Failed to send Action Frame(retry %d)\n", tx_retry);
1780                 clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status);
1781         }
1782
1783 exit:
1784         clear_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status);
1785
1786         /* WAR: sometimes dongle does not keep the dwell time of 'actframe'.
1787          * if we coundn't get the next action response frame and dongle does
1788          * not keep the dwell time, go to listen state again to get next action
1789          * response frame.
1790          */
1791         if (ack && config_af_params.extra_listen && !p2p->block_gon_req_tx &&
1792             test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status) &&
1793             p2p->af_sent_channel == afx_hdl->my_listen_chan) {
1794                 delta_ms = jiffies_to_msecs(jiffies - p2p->af_tx_sent_jiffies);
1795                 if (le32_to_cpu(af_params->dwell_time) > delta_ms)
1796                         extra_listen_time = le32_to_cpu(af_params->dwell_time) -
1797                                             delta_ms;
1798                 else
1799                         extra_listen_time = 0;
1800                 if (extra_listen_time > 50) {
1801                         set_bit(BRCMF_P2P_STATUS_WAITING_NEXT_AF_LISTEN,
1802                                 &p2p->status);
1803                         brcmf_dbg(INFO, "Wait more time! actual af time:%d, calculated extra listen:%d\n",
1804                                   le32_to_cpu(af_params->dwell_time),
1805                                   extra_listen_time);
1806                         extra_listen_time += 100;
1807                         if (!brcmf_p2p_discover_listen(p2p,
1808                                                        p2p->af_sent_channel,
1809                                                        extra_listen_time)) {
1810                                 unsigned long duration;
1811
1812                                 extra_listen_time += 100;
1813                                 duration = msecs_to_jiffies(extra_listen_time);
1814                                 wait_for_completion_timeout(&p2p->wait_next_af,
1815                                                             duration);
1816                         }
1817                         clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_AF_LISTEN,
1818                                   &p2p->status);
1819                 }
1820         }
1821
1822         if (p2p->block_gon_req_tx) {
1823                 /* if ack is true, supplicant will wait more time(100ms).
1824                  * so we will return it as a success to get more time .
1825                  */
1826                 p2p->block_gon_req_tx = false;
1827                 ack = true;
1828         }
1829
1830         clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status);
1831         /* if all done, turn mpc on again */
1832         if (config_af_params.mpc_onoff == 1)
1833                 brcmf_set_mpc(ifp, 1);
1834
1835         return ack;
1836 }
1837
1838 /**
1839  * brcmf_p2p_notify_rx_mgmt_p2p_probereq() - Event handler for p2p probe req.
1840  *
1841  * @ifp: interface pointer for which event was received.
1842  * @e: even message.
1843  * @data: payload of event message (probe request).
1844  */
1845 s32 brcmf_p2p_notify_rx_mgmt_p2p_probereq(struct brcmf_if *ifp,
1846                                           const struct brcmf_event_msg *e,
1847                                           void *data)
1848 {
1849         struct brcmf_cfg80211_info *cfg = ifp->drvr->config;
1850         struct brcmf_p2p_info *p2p = &cfg->p2p;
1851         struct afx_hdl *afx_hdl = &p2p->afx_hdl;
1852         struct brcmf_cfg80211_vif *vif = ifp->vif;
1853         struct brcmf_rx_mgmt_data *rxframe = (struct brcmf_rx_mgmt_data *)data;
1854         u16 chanspec = be16_to_cpu(rxframe->chanspec);
1855         struct brcmu_chan ch;
1856         u8 *mgmt_frame;
1857         u32 mgmt_frame_len;
1858         s32 freq;
1859         u16 mgmt_type;
1860
1861         brcmf_dbg(INFO, "Enter: event %d reason %d\n", e->event_code,
1862                   e->reason);
1863
1864         ch.chspec = be16_to_cpu(rxframe->chanspec);
1865         cfg->d11inf.decchspec(&ch);
1866
1867         if (test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status) &&
1868             (memcmp(afx_hdl->tx_dst_addr, e->addr, ETH_ALEN) == 0)) {
1869                 afx_hdl->peer_chan = ch.chnum;
1870                 brcmf_dbg(INFO, "PROBE REQUEST: Peer found, channel=%d\n",
1871                           afx_hdl->peer_chan);
1872                 complete(&afx_hdl->act_frm_scan);
1873         }
1874
1875         /* Firmware sends us two proberesponses for each idx one. At the */
1876         /* moment anything but bsscfgidx 0 is passed up to supplicant    */
1877         if (e->bsscfgidx == 0)
1878                 return 0;
1879
1880         /* Filter any P2P probe reqs arriving during the GO-NEG Phase */
1881         if (test_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status)) {
1882                 brcmf_dbg(INFO, "Filtering P2P probe_req in GO-NEG phase\n");
1883                 return 0;
1884         }
1885
1886         /* Check if wpa_supplicant has registered for this frame */
1887         brcmf_dbg(INFO, "vif->mgmt_rx_reg %04x\n", vif->mgmt_rx_reg);
1888         mgmt_type = (IEEE80211_STYPE_PROBE_REQ & IEEE80211_FCTL_STYPE) >> 4;
1889         if ((vif->mgmt_rx_reg & BIT(mgmt_type)) == 0)
1890                 return 0;
1891
1892         mgmt_frame = (u8 *)(rxframe + 1);
1893         mgmt_frame_len = e->datalen - sizeof(*rxframe);
1894         freq = ieee80211_channel_to_frequency(ch.chnum,
1895                                               ch.band == BRCMU_CHAN_BAND_2G ?
1896                                               IEEE80211_BAND_2GHZ :
1897                                               IEEE80211_BAND_5GHZ);
1898
1899         cfg80211_rx_mgmt(&vif->wdev, freq, 0, mgmt_frame, mgmt_frame_len, 0,
1900                          GFP_ATOMIC);
1901
1902         brcmf_dbg(INFO, "mgmt_frame_len (%d) , e->datalen (%d), chanspec (%04x), freq (%d)\n",
1903                   mgmt_frame_len, e->datalen, chanspec, freq);
1904
1905         return 0;
1906 }
1907
1908
1909 /**
1910  * brcmf_p2p_attach() - attach for P2P.
1911  *
1912  * @cfg: driver private data for cfg80211 interface.
1913  */
1914 s32 brcmf_p2p_attach(struct brcmf_cfg80211_info *cfg)
1915 {
1916         struct brcmf_if *pri_ifp;
1917         struct brcmf_if *p2p_ifp;
1918         struct brcmf_cfg80211_vif *p2p_vif;
1919         struct brcmf_p2p_info *p2p;
1920         struct brcmf_pub *drvr;
1921         s32 bssidx;
1922         s32 err = 0;
1923
1924         p2p = &cfg->p2p;
1925         p2p->cfg = cfg;
1926
1927         drvr = cfg->pub;
1928
1929         pri_ifp = drvr->iflist[0];
1930         p2p_ifp = drvr->iflist[1];
1931
1932         p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif = pri_ifp->vif;
1933
1934         if (p2p_ifp) {
1935                 p2p_vif = brcmf_alloc_vif(cfg, NL80211_IFTYPE_P2P_DEVICE,
1936                                           false);
1937                 if (IS_ERR(p2p_vif)) {
1938                         brcmf_err("could not create discovery vif\n");
1939                         err = -ENOMEM;
1940                         goto exit;
1941                 }
1942
1943                 p2p_vif->ifp = p2p_ifp;
1944                 p2p_ifp->vif = p2p_vif;
1945                 p2p_vif->wdev.netdev = p2p_ifp->ndev;
1946                 p2p_ifp->ndev->ieee80211_ptr = &p2p_vif->wdev;
1947                 SET_NETDEV_DEV(p2p_ifp->ndev, wiphy_dev(cfg->wiphy));
1948
1949                 p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif = p2p_vif;
1950
1951                 brcmf_p2p_generate_bss_mac(p2p, NULL);
1952                 memcpy(p2p_ifp->mac_addr, p2p->dev_addr, ETH_ALEN);
1953                 brcmf_p2p_set_firmware(pri_ifp, p2p->dev_addr);
1954
1955                 /* Initialize P2P Discovery in the firmware */
1956                 err = brcmf_fil_iovar_int_set(pri_ifp, "p2p_disc", 1);
1957                 if (err < 0) {
1958                         brcmf_err("set p2p_disc error\n");
1959                         brcmf_free_vif(cfg, p2p_vif);
1960                         goto exit;
1961                 }
1962                 /* obtain bsscfg index for P2P discovery */
1963                 err = brcmf_fil_iovar_int_get(pri_ifp, "p2p_dev", &bssidx);
1964                 if (err < 0) {
1965                         brcmf_err("retrieving discover bsscfg index failed\n");
1966                         brcmf_free_vif(cfg, p2p_vif);
1967                         goto exit;
1968                 }
1969                 /* Verify that firmware uses same bssidx as driver !! */
1970                 if (p2p_ifp->bssidx != bssidx) {
1971                         brcmf_err("Incorrect bssidx=%d, compared to p2p_ifp->bssidx=%d\n",
1972                                   bssidx, p2p_ifp->bssidx);
1973                         brcmf_free_vif(cfg, p2p_vif);
1974                         goto exit;
1975                 }
1976
1977                 init_completion(&p2p->send_af_done);
1978                 INIT_WORK(&p2p->afx_hdl.afx_work, brcmf_p2p_afx_handler);
1979                 init_completion(&p2p->afx_hdl.act_frm_scan);
1980                 init_completion(&p2p->wait_next_af);
1981         }
1982 exit:
1983         return err;
1984 }
1985
1986
1987 /**
1988  * brcmf_p2p_detach() - detach P2P.
1989  *
1990  * @p2p: P2P specific data.
1991  */
1992 void brcmf_p2p_detach(struct brcmf_p2p_info *p2p)
1993 {
1994         struct brcmf_cfg80211_vif *vif;
1995
1996         vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif;
1997         if (vif != NULL) {
1998                 brcmf_p2p_cancel_remain_on_channel(vif->ifp);
1999                 brcmf_p2p_deinit_discovery(p2p);
2000                 /* remove discovery interface */
2001                 brcmf_free_vif(p2p->cfg, vif);
2002                 p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif = NULL;
2003         }
2004         /* just set it all to zero */
2005         memset(p2p, 0, sizeof(*p2p));
2006 }
2007
2008 /**
2009  * brcmf_p2p_get_current_chanspec() - Get current operation channel.
2010  *
2011  * @p2p: P2P specific data.
2012  * @chanspec: chanspec to be returned.
2013  */
2014 static void brcmf_p2p_get_current_chanspec(struct brcmf_p2p_info *p2p,
2015                                            u16 *chanspec)
2016 {
2017         struct brcmf_if *ifp;
2018         u8 mac_addr[ETH_ALEN];
2019         struct brcmu_chan ch;
2020         struct brcmf_bss_info_le *bi;
2021         u8 *buf;
2022
2023         ifp = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->ifp;
2024
2025         if (brcmf_fil_cmd_data_get(ifp, BRCMF_C_GET_BSSID, mac_addr,
2026                                    ETH_ALEN) == 0) {
2027                 buf = kzalloc(WL_BSS_INFO_MAX, GFP_KERNEL);
2028                 if (buf != NULL) {
2029                         *(__le32 *)buf = cpu_to_le32(WL_BSS_INFO_MAX);
2030                         if (brcmf_fil_cmd_data_get(ifp, BRCMF_C_GET_BSS_INFO,
2031                                                    buf, WL_BSS_INFO_MAX) == 0) {
2032                                 bi = (struct brcmf_bss_info_le *)(buf + 4);
2033                                 *chanspec = le16_to_cpu(bi->chanspec);
2034                                 kfree(buf);
2035                                 return;
2036                         }
2037                         kfree(buf);
2038                 }
2039         }
2040         /* Use default channel for P2P */
2041         ch.chnum = BRCMF_P2P_TEMP_CHAN;
2042         ch.bw = BRCMU_CHAN_BW_20;
2043         p2p->cfg->d11inf.encchspec(&ch);
2044         *chanspec = ch.chspec;
2045 }
2046
2047 /**
2048  * Change a P2P Role.
2049  * Parameters:
2050  * @mac: MAC address of the BSS to change a role
2051  * Returns 0 if success.
2052  */
2053 int brcmf_p2p_ifchange(struct brcmf_cfg80211_info *cfg,
2054                        enum brcmf_fil_p2p_if_types if_type)
2055 {
2056         struct brcmf_p2p_info *p2p = &cfg->p2p;
2057         struct brcmf_cfg80211_vif *vif;
2058         struct brcmf_fil_p2p_if_le if_request;
2059         s32 err;
2060         u16 chanspec;
2061
2062         brcmf_dbg(TRACE, "Enter\n");
2063
2064         vif = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif;
2065         if (!vif) {
2066                 brcmf_err("vif for P2PAPI_BSSCFG_PRIMARY does not exist\n");
2067                 return -EPERM;
2068         }
2069         brcmf_notify_escan_complete(cfg, vif->ifp, true, true);
2070         vif = p2p->bss_idx[P2PAPI_BSSCFG_CONNECTION].vif;
2071         if (!vif) {
2072                 brcmf_err("vif for P2PAPI_BSSCFG_CONNECTION does not exist\n");
2073                 return -EPERM;
2074         }
2075         brcmf_set_mpc(vif->ifp, 0);
2076
2077         /* In concurrency case, STA may be already associated in a particular */
2078         /* channel. so retrieve the current channel of primary interface and  */
2079         /* then start the virtual interface on that.                          */
2080         brcmf_p2p_get_current_chanspec(p2p, &chanspec);
2081
2082         if_request.type = cpu_to_le16((u16)if_type);
2083         if_request.chspec = cpu_to_le16(chanspec);
2084         memcpy(if_request.addr, p2p->int_addr, sizeof(if_request.addr));
2085
2086         brcmf_cfg80211_arm_vif_event(cfg, vif);
2087         err = brcmf_fil_iovar_data_set(vif->ifp, "p2p_ifupd", &if_request,
2088                                        sizeof(if_request));
2089         if (err) {
2090                 brcmf_err("p2p_ifupd FAILED, err=%d\n", err);
2091                 brcmf_cfg80211_arm_vif_event(cfg, NULL);
2092                 return err;
2093         }
2094         err = brcmf_cfg80211_wait_vif_event_timeout(cfg, BRCMF_E_IF_CHANGE,
2095                                                     msecs_to_jiffies(1500));
2096         brcmf_cfg80211_arm_vif_event(cfg, NULL);
2097         if (!err)  {
2098                 brcmf_err("No BRCMF_E_IF_CHANGE event received\n");
2099                 return -EIO;
2100         }
2101
2102         err = brcmf_fil_cmd_int_set(vif->ifp, BRCMF_C_SET_SCB_TIMEOUT,
2103                                     BRCMF_SCB_TIMEOUT_VALUE);
2104
2105         return err;
2106 }
2107
2108 static int brcmf_p2p_request_p2p_if(struct brcmf_p2p_info *p2p,
2109                                     struct brcmf_if *ifp, u8 ea[ETH_ALEN],
2110                                     enum brcmf_fil_p2p_if_types iftype)
2111 {
2112         struct brcmf_fil_p2p_if_le if_request;
2113         int err;
2114         u16 chanspec;
2115
2116         /* we need a default channel */
2117         brcmf_p2p_get_current_chanspec(p2p, &chanspec);
2118
2119         /* fill the firmware request */
2120         memcpy(if_request.addr, ea, ETH_ALEN);
2121         if_request.type = cpu_to_le16((u16)iftype);
2122         if_request.chspec = cpu_to_le16(chanspec);
2123
2124         err = brcmf_fil_iovar_data_set(ifp, "p2p_ifadd", &if_request,
2125                                        sizeof(if_request));
2126         if (err)
2127                 return err;
2128
2129         return err;
2130 }
2131
2132 static int brcmf_p2p_disable_p2p_if(struct brcmf_cfg80211_vif *vif)
2133 {
2134         struct brcmf_cfg80211_info *cfg = wdev_to_cfg(&vif->wdev);
2135         struct net_device *pri_ndev = cfg_to_ndev(cfg);
2136         struct brcmf_if *ifp = netdev_priv(pri_ndev);
2137         u8 *addr = vif->wdev.netdev->dev_addr;
2138
2139         return brcmf_fil_iovar_data_set(ifp, "p2p_ifdis", addr, ETH_ALEN);
2140 }
2141
2142 static int brcmf_p2p_release_p2p_if(struct brcmf_cfg80211_vif *vif)
2143 {
2144         struct brcmf_cfg80211_info *cfg = wdev_to_cfg(&vif->wdev);
2145         struct net_device *pri_ndev = cfg_to_ndev(cfg);
2146         struct brcmf_if *ifp = netdev_priv(pri_ndev);
2147         u8 *addr = vif->wdev.netdev->dev_addr;
2148
2149         return brcmf_fil_iovar_data_set(ifp, "p2p_ifdel", addr, ETH_ALEN);
2150 }
2151
2152 /**
2153  * brcmf_p2p_create_p2pdev() - create a P2P_DEVICE virtual interface.
2154  *
2155  * @p2p: P2P specific data.
2156  * @wiphy: wiphy device of new interface.
2157  * @addr: mac address for this new interface.
2158  */
2159 static struct wireless_dev *brcmf_p2p_create_p2pdev(struct brcmf_p2p_info *p2p,
2160                                                     struct wiphy *wiphy,
2161                                                     u8 *addr)
2162 {
2163         struct brcmf_cfg80211_vif *p2p_vif;
2164         struct brcmf_if *p2p_ifp;
2165         struct brcmf_if *pri_ifp;
2166         int err;
2167         u32 bssidx;
2168
2169         if (p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif)
2170                 return ERR_PTR(-ENOSPC);
2171
2172         p2p_vif = brcmf_alloc_vif(p2p->cfg, NL80211_IFTYPE_P2P_DEVICE,
2173                                   false);
2174         if (IS_ERR(p2p_vif)) {
2175                 brcmf_err("could not create discovery vif\n");
2176                 return (struct wireless_dev *)p2p_vif;
2177         }
2178
2179         pri_ifp = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->ifp;
2180         brcmf_p2p_generate_bss_mac(p2p, addr);
2181         brcmf_p2p_set_firmware(pri_ifp, p2p->dev_addr);
2182
2183         brcmf_cfg80211_arm_vif_event(p2p->cfg, p2p_vif);
2184
2185         /* Initialize P2P Discovery in the firmware */
2186         err = brcmf_fil_iovar_int_set(pri_ifp, "p2p_disc", 1);
2187         if (err < 0) {
2188                 brcmf_err("set p2p_disc error\n");
2189                 brcmf_cfg80211_arm_vif_event(p2p->cfg, NULL);
2190                 goto fail;
2191         }
2192
2193         /* wait for firmware event */
2194         err = brcmf_cfg80211_wait_vif_event_timeout(p2p->cfg, BRCMF_E_IF_ADD,
2195                                                     msecs_to_jiffies(1500));
2196         brcmf_cfg80211_arm_vif_event(p2p->cfg, NULL);
2197         if (!err) {
2198                 brcmf_err("timeout occurred\n");
2199                 err = -EIO;
2200                 goto fail;
2201         }
2202
2203         /* discovery interface created */
2204         p2p_ifp = p2p_vif->ifp;
2205         p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif = p2p_vif;
2206         memcpy(p2p_ifp->mac_addr, p2p->dev_addr, ETH_ALEN);
2207         memcpy(&p2p_vif->wdev.address, p2p->dev_addr, sizeof(p2p->dev_addr));
2208
2209         /* verify bsscfg index for P2P discovery */
2210         err = brcmf_fil_iovar_int_get(pri_ifp, "p2p_dev", &bssidx);
2211         if (err < 0) {
2212                 brcmf_err("retrieving discover bsscfg index failed\n");
2213                 goto fail;
2214         }
2215
2216         WARN_ON(p2p_ifp->bssidx != bssidx);
2217
2218         init_completion(&p2p->send_af_done);
2219         INIT_WORK(&p2p->afx_hdl.afx_work, brcmf_p2p_afx_handler);
2220         init_completion(&p2p->afx_hdl.act_frm_scan);
2221         init_completion(&p2p->wait_next_af);
2222
2223         return &p2p_vif->wdev;
2224
2225 fail:
2226         brcmf_free_vif(p2p->cfg, p2p_vif);
2227         return ERR_PTR(err);
2228 }
2229
2230 /**
2231  * brcmf_p2p_delete_p2pdev() - delete P2P_DEVICE virtual interface.
2232  *
2233  * @vif: virtual interface object to delete.
2234  */
2235 static void brcmf_p2p_delete_p2pdev(struct brcmf_cfg80211_info *cfg,
2236                                     struct brcmf_cfg80211_vif *vif)
2237 {
2238         cfg80211_unregister_wdev(&vif->wdev);
2239         cfg->p2p.bss_idx[P2PAPI_BSSCFG_DEVICE].vif = NULL;
2240         brcmf_free_vif(cfg, vif);
2241 }
2242
2243 /**
2244  * brcmf_p2p_free_p2p_if() - free up net device related data.
2245  *
2246  * @ndev: net device that needs to be freed.
2247  */
2248 static void brcmf_p2p_free_p2p_if(struct net_device *ndev)
2249 {
2250         struct brcmf_cfg80211_info *cfg;
2251         struct brcmf_cfg80211_vif *vif;
2252         struct brcmf_if *ifp;
2253
2254         ifp = netdev_priv(ndev);
2255         cfg = ifp->drvr->config;
2256         vif = ifp->vif;
2257
2258         brcmf_free_vif(cfg, vif);
2259         free_netdev(ifp->ndev);
2260 }
2261
2262 /**
2263  * brcmf_p2p_add_vif() - create a new P2P virtual interface.
2264  *
2265  * @wiphy: wiphy device of new interface.
2266  * @name: name of the new interface.
2267  * @type: nl80211 interface type.
2268  * @flags: not used.
2269  * @params: contains mac address for P2P device.
2270  */
2271 struct wireless_dev *brcmf_p2p_add_vif(struct wiphy *wiphy, const char *name,
2272                                        enum nl80211_iftype type, u32 *flags,
2273                                        struct vif_params *params)
2274 {
2275         struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
2276         struct brcmf_if *ifp = netdev_priv(cfg_to_ndev(cfg));
2277         struct brcmf_cfg80211_vif *vif;
2278         enum brcmf_fil_p2p_if_types iftype;
2279         enum wl_mode mode;
2280         int err;
2281
2282         if (brcmf_cfg80211_vif_event_armed(cfg))
2283                 return ERR_PTR(-EBUSY);
2284
2285         brcmf_dbg(INFO, "adding vif \"%s\" (type=%d)\n", name, type);
2286
2287         switch (type) {
2288         case NL80211_IFTYPE_P2P_CLIENT:
2289                 iftype = BRCMF_FIL_P2P_IF_CLIENT;
2290                 mode = WL_MODE_BSS;
2291                 break;
2292         case NL80211_IFTYPE_P2P_GO:
2293                 iftype = BRCMF_FIL_P2P_IF_GO;
2294                 mode = WL_MODE_AP;
2295                 break;
2296         case NL80211_IFTYPE_P2P_DEVICE:
2297                 return brcmf_p2p_create_p2pdev(&cfg->p2p, wiphy,
2298                                                params->macaddr);
2299         default:
2300                 return ERR_PTR(-EOPNOTSUPP);
2301         }
2302
2303         vif = brcmf_alloc_vif(cfg, type, false);
2304         if (IS_ERR(vif))
2305                 return (struct wireless_dev *)vif;
2306         brcmf_cfg80211_arm_vif_event(cfg, vif);
2307
2308         err = brcmf_p2p_request_p2p_if(&cfg->p2p, ifp, cfg->p2p.int_addr,
2309                                        iftype);
2310         if (err) {
2311                 brcmf_cfg80211_arm_vif_event(cfg, NULL);
2312                 goto fail;
2313         }
2314
2315         /* wait for firmware event */
2316         err = brcmf_cfg80211_wait_vif_event_timeout(cfg, BRCMF_E_IF_ADD,
2317                                                     msecs_to_jiffies(1500));
2318         brcmf_cfg80211_arm_vif_event(cfg, NULL);
2319         if (!err) {
2320                 brcmf_err("timeout occurred\n");
2321                 err = -EIO;
2322                 goto fail;
2323         }
2324
2325         /* interface created in firmware */
2326         ifp = vif->ifp;
2327         if (!ifp) {
2328                 brcmf_err("no if pointer provided\n");
2329                 err = -ENOENT;
2330                 goto fail;
2331         }
2332
2333         strncpy(ifp->ndev->name, name, sizeof(ifp->ndev->name) - 1);
2334         err = brcmf_net_attach(ifp, true);
2335         if (err) {
2336                 brcmf_err("Registering netdevice failed\n");
2337                 goto fail;
2338         }
2339         /* override destructor */
2340         ifp->ndev->destructor = brcmf_p2p_free_p2p_if;
2341
2342         cfg->p2p.bss_idx[P2PAPI_BSSCFG_CONNECTION].vif = vif;
2343         /* Disable firmware roaming for P2P interface  */
2344         brcmf_fil_iovar_int_set(ifp, "roam_off", 1);
2345         if (iftype == BRCMF_FIL_P2P_IF_GO) {
2346                 /* set station timeout for p2p */
2347                 brcmf_fil_cmd_int_set(ifp, BRCMF_C_SET_SCB_TIMEOUT,
2348                                       BRCMF_SCB_TIMEOUT_VALUE);
2349         }
2350         return &ifp->vif->wdev;
2351
2352 fail:
2353         brcmf_free_vif(cfg, vif);
2354         return ERR_PTR(err);
2355 }
2356
2357 /**
2358  * brcmf_p2p_del_vif() - delete a P2P virtual interface.
2359  *
2360  * @wiphy: wiphy device of interface.
2361  * @wdev: wireless device of interface.
2362  *
2363  * TODO: not yet supported.
2364  */
2365 int brcmf_p2p_del_vif(struct wiphy *wiphy, struct wireless_dev *wdev)
2366 {
2367         struct brcmf_cfg80211_info *cfg = wiphy_priv(wiphy);
2368         struct brcmf_p2p_info *p2p = &cfg->p2p;
2369         struct brcmf_cfg80211_vif *vif;
2370         unsigned long jiffie_timeout = msecs_to_jiffies(1500);
2371         bool wait_for_disable = false;
2372         int err;
2373
2374         brcmf_dbg(TRACE, "delete P2P vif\n");
2375         vif = container_of(wdev, struct brcmf_cfg80211_vif, wdev);
2376
2377         switch (vif->wdev.iftype) {
2378         case NL80211_IFTYPE_P2P_CLIENT:
2379                 if (test_bit(BRCMF_VIF_STATUS_DISCONNECTING, &vif->sme_state))
2380                         wait_for_disable = true;
2381                 break;
2382
2383         case NL80211_IFTYPE_P2P_GO:
2384                 if (!brcmf_p2p_disable_p2p_if(vif))
2385                         wait_for_disable = true;
2386                 break;
2387
2388         case NL80211_IFTYPE_P2P_DEVICE:
2389                 brcmf_p2p_delete_p2pdev(cfg, vif);
2390                 return 0;
2391         default:
2392                 return -ENOTSUPP;
2393                 break;
2394         }
2395
2396         clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status);
2397         brcmf_dbg(INFO, "P2P: GO_NEG_PHASE status cleared\n");
2398
2399         if (wait_for_disable)
2400                 wait_for_completion_timeout(&cfg->vif_disabled,
2401                                             msecs_to_jiffies(500));
2402
2403         brcmf_vif_clear_mgmt_ies(vif);
2404
2405         brcmf_cfg80211_arm_vif_event(cfg, vif);
2406         err = brcmf_p2p_release_p2p_if(vif);
2407         if (!err) {
2408                 /* wait for firmware event */
2409                 err = brcmf_cfg80211_wait_vif_event_timeout(cfg, BRCMF_E_IF_DEL,
2410                                                             jiffie_timeout);
2411                 if (!err)
2412                         err = -EIO;
2413                 else
2414                         err = 0;
2415         }
2416         brcmf_cfg80211_arm_vif_event(cfg, NULL);
2417         p2p->bss_idx[P2PAPI_BSSCFG_CONNECTION].vif = NULL;
2418
2419         return err;
2420 }
2421
2422 int brcmf_p2p_start_device(struct wiphy *wiphy, struct wireless_dev *wdev)
2423 {
2424         struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
2425         struct brcmf_p2p_info *p2p = &cfg->p2p;
2426         struct brcmf_cfg80211_vif *vif;
2427         int err;
2428
2429         vif = container_of(wdev, struct brcmf_cfg80211_vif, wdev);
2430         mutex_lock(&cfg->usr_sync);
2431         err = brcmf_p2p_enable_discovery(p2p);
2432         if (!err)
2433                 set_bit(BRCMF_VIF_STATUS_READY, &vif->sme_state);
2434         mutex_unlock(&cfg->usr_sync);
2435         return err;
2436 }
2437
2438 void brcmf_p2p_stop_device(struct wiphy *wiphy, struct wireless_dev *wdev)
2439 {
2440         struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
2441         struct brcmf_p2p_info *p2p = &cfg->p2p;
2442         struct brcmf_cfg80211_vif *vif;
2443
2444         vif = container_of(wdev, struct brcmf_cfg80211_vif, wdev);
2445         mutex_lock(&cfg->usr_sync);
2446         (void)brcmf_p2p_deinit_discovery(p2p);
2447         brcmf_abort_scanning(cfg);
2448         clear_bit(BRCMF_VIF_STATUS_READY, &vif->sme_state);
2449         mutex_unlock(&cfg->usr_sync);
2450 }