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