drivers/net/wireless/broadcom/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 <linux/rtnetlink.h>
  20 #include <net/cfg80211.h>
  21
  22 #include <brcmu_wifi.h>
  23 #include <brcmu_utils.h>
  24 #include <defs.h>
  25 #include "core.h"
  26 #include "debug.h"
  27 #include "fwil.h"
  28 #include "fwil_types.h"
  29 #include "p2p.h"
  30 #include "cfg80211.h"
  31
  32 /* parameters used for p2p escan */
  33 #define P2PAPI_SCAN_NPROBES 1
  34 #define P2PAPI_SCAN_DWELL_TIME_MS 80
  35 #define P2PAPI_SCAN_SOCIAL_DWELL_TIME_MS 40
  36 #define P2PAPI_SCAN_HOME_TIME_MS 60
  37 #define P2PAPI_SCAN_NPROBS_TIME_MS 30
  38 #define P2PAPI_SCAN_AF_SEARCH_DWELL_TIME_MS 100
  39 #define WL_SCAN_CONNECT_DWELL_TIME_MS 200
  40 #define WL_SCAN_JOIN_PROBE_INTERVAL_MS 20
  41
  42 #define BRCMF_P2P_WILDCARD_SSID         "DIRECT-"
  43 #define BRCMF_P2P_WILDCARD_SSID_LEN     (sizeof(BRCMF_P2P_WILDCARD_SSID) - 1)
  44
  45 #define SOCIAL_CHAN_1           1
  46 #define SOCIAL_CHAN_2           6
  47 #define SOCIAL_CHAN_3           11
  48 #define IS_P2P_SOCIAL_CHANNEL(channel) ((channel == SOCIAL_CHAN_1) || \
  49                                          (channel == SOCIAL_CHAN_2) || \
  50                                          (channel == SOCIAL_CHAN_3))
  51 #define BRCMF_P2P_TEMP_CHAN     SOCIAL_CHAN_3
  52 #define SOCIAL_CHAN_CNT         3
  53 #define AF_PEER_SEARCH_CNT      2
  54
  55 #define BRCMF_SCB_TIMEOUT_VALUE 20
  56
  57 #define P2P_VER                 9       /* P2P version: 9=WiFi P2P v1.0 */
  58 #define P2P_PUB_AF_CATEGORY     0x04
  59 #define P2P_PUB_AF_ACTION       0x09
  60 #define P2P_AF_CATEGORY         0x7f
  61 #define P2P_OUI                 "\x50\x6F\x9A"  /* P2P OUI */
  62 #define P2P_OUI_LEN             3               /* P2P OUI length */
  63
  64 /* Action Frame Constants */
  65 #define DOT11_ACTION_HDR_LEN    2       /* action frame category + action */
  66 #define DOT11_ACTION_CAT_OFF    0       /* category offset */
  67 #define DOT11_ACTION_ACT_OFF    1       /* action offset */
  68
  69 #define P2P_AF_DWELL_TIME               200
  70 #define P2P_AF_MIN_DWELL_TIME           100
  71 #define P2P_AF_MED_DWELL_TIME           400
  72 #define P2P_AF_LONG_DWELL_TIME          1000
  73 #define P2P_AF_TX_MAX_RETRY             1
  74 #define P2P_AF_MAX_WAIT_TIME            msecs_to_jiffies(2000)
  75 #define P2P_INVALID_CHANNEL             -1
  76 #define P2P_CHANNEL_SYNC_RETRY          5
  77 #define P2P_AF_FRM_SCAN_MAX_WAIT        msecs_to_jiffies(450)
  78 #define P2P_DEFAULT_SLEEP_TIME_VSDB     200
  79
  80 /* WiFi P2P Public Action Frame OUI Subtypes */
  81 #define P2P_PAF_GON_REQ         0       /* Group Owner Negotiation Req */
  82 #define P2P_PAF_GON_RSP         1       /* Group Owner Negotiation Rsp */
  83 #define P2P_PAF_GON_CONF        2       /* Group Owner Negotiation Confirm */
  84 #define P2P_PAF_INVITE_REQ      3       /* P2P Invitation Request */
  85 #define P2P_PAF_INVITE_RSP      4       /* P2P Invitation Response */
  86 #define P2P_PAF_DEVDIS_REQ      5       /* Device Discoverability Request */
  87 #define P2P_PAF_DEVDIS_RSP      6       /* Device Discoverability Response */
  88 #define P2P_PAF_PROVDIS_REQ     7       /* Provision Discovery Request */
  89 #define P2P_PAF_PROVDIS_RSP     8       /* Provision Discovery Response */
  90 #define P2P_PAF_SUBTYPE_INVALID 255     /* Invalid Subtype */
  91
  92 /* WiFi P2P Action Frame OUI Subtypes */
  93 #define P2P_AF_NOTICE_OF_ABSENCE        0       /* Notice of Absence */
  94 #define P2P_AF_PRESENCE_REQ             1       /* P2P Presence Request */
  95 #define P2P_AF_PRESENCE_RSP             2       /* P2P Presence Response */
  96 #define P2P_AF_GO_DISC_REQ              3       /* GO Discoverability Request */
  97
  98 /* P2P Service Discovery related */
  99 #define P2PSD_ACTION_CATEGORY           0x04    /* Public action frame */
 100 #define P2PSD_ACTION_ID_GAS_IREQ        0x0a    /* GAS Initial Request AF */
 101 #define P2PSD_ACTION_ID_GAS_IRESP       0x0b    /* GAS Initial Response AF */
 102 #define P2PSD_ACTION_ID_GAS_CREQ        0x0c    /* GAS Comback Request AF */
 103 #define P2PSD_ACTION_ID_GAS_CRESP       0x0d    /* GAS Comback Response AF */
 104
 105 #define BRCMF_P2P_DISABLE_TIMEOUT       msecs_to_jiffies(500)
 106 /**
 107  * struct brcmf_p2p_disc_st_le - set discovery state in firmware.
 108  *
 109  * @state: requested discovery state (see enum brcmf_p2p_disc_state).
 110  * @chspec: channel parameter for %WL_P2P_DISC_ST_LISTEN state.
 111  * @dwell: dwell time in ms for %WL_P2P_DISC_ST_LISTEN state.
 112  */
 113 struct brcmf_p2p_disc_st_le {
 114         u8 state;
 115         __le16 chspec;
 116         __le16 dwell;
 117 };
 118
 119 /**
 120  * enum brcmf_p2p_disc_state - P2P discovery state values
 121  *
 122  * @WL_P2P_DISC_ST_SCAN: P2P discovery with wildcard SSID and P2P IE.
 123  * @WL_P2P_DISC_ST_LISTEN: P2P discovery off-channel for specified time.
 124  * @WL_P2P_DISC_ST_SEARCH: P2P discovery with P2P wildcard SSID and P2P IE.
 125  */
 126 enum brcmf_p2p_disc_state {
 127         WL_P2P_DISC_ST_SCAN,
 128         WL_P2P_DISC_ST_LISTEN,
 129         WL_P2P_DISC_ST_SEARCH
 130 };
 131
 132 /**
 133  * struct brcmf_p2p_scan_le - P2P specific scan request.
 134  *
 135  * @type: type of scan method requested (values: 'E' or 'S').
 136  * @reserved: reserved (ignored).
 137  * @eparams: parameters used for type 'E'.
 138  * @sparams: parameters used for type 'S'.
 139  */
 140 struct brcmf_p2p_scan_le {
 141         u8 type;
 142         u8 reserved[3];
 143         union {
 144                 struct brcmf_escan_params_le eparams;
 145                 struct brcmf_scan_params_le sparams;
 146         };
 147 };
 148
 149 /**
 150  * struct brcmf_p2p_pub_act_frame - WiFi P2P Public Action Frame
 151  *
 152  * @category: P2P_PUB_AF_CATEGORY
 153  * @action: P2P_PUB_AF_ACTION
 154  * @oui[3]: P2P_OUI
 155  * @oui_type: OUI type - P2P_VER
 156  * @subtype: OUI subtype - P2P_TYPE_*
 157  * @dialog_token: nonzero, identifies req/rsp transaction
 158  * @elts[1]: Variable length information elements.
 159  */
 160 struct brcmf_p2p_pub_act_frame {
 161         u8      category;
 162         u8      action;
 163         u8      oui[3];
 164         u8      oui_type;
 165         u8      subtype;
 166         u8      dialog_token;
 167         u8      elts[1];
 168 };
 169
 170 /**
 171  * struct brcmf_p2p_action_frame - WiFi P2P Action Frame
 172  *
 173  * @category: P2P_AF_CATEGORY
 174  * @OUI[3]: OUI - P2P_OUI
 175  * @type: OUI Type - P2P_VER
 176  * @subtype: OUI Subtype - P2P_AF_*
 177  * @dialog_token: nonzero, identifies req/resp tranaction
 178  * @elts[1]: Variable length information elements.
 179  */
 180 struct brcmf_p2p_action_frame {
 181         u8      category;
 182         u8      oui[3];
 183         u8      type;
 184         u8      subtype;
 185         u8      dialog_token;
 186         u8      elts[1];
 187 };
 188
 189 /**
 190  * struct brcmf_p2psd_gas_pub_act_frame - Wi-Fi GAS Public Action Frame
 191  *
 192  * @category: 0x04 Public Action Frame
 193  * @action: 0x6c Advertisement Protocol
 194  * @dialog_token: nonzero, identifies req/rsp transaction
 195  * @query_data[1]: Query Data. SD gas ireq SD gas iresp
 196  */
 197 struct brcmf_p2psd_gas_pub_act_frame {
 198         u8      category;
 199         u8      action;
 200         u8      dialog_token;
 201         u8      query_data[1];
 202 };
 203
 204 /**
 205  * struct brcmf_config_af_params - Action Frame Parameters for tx.
 206  *
 207  * @mpc_onoff: To make sure to send successfully action frame, we have to
 208  *             turn off mpc  0: off, 1: on,  (-1): do nothing
 209  * @search_channel: 1: search peer's channel to send af
 210  * extra_listen: keep the dwell time to get af response frame.
 211  */
 212 struct brcmf_config_af_params {
 213         s32 mpc_onoff;
 214         bool search_channel;
 215         bool extra_listen;
 216 };
 217
 218 /**
 219  * brcmf_p2p_is_pub_action() - true if p2p public type frame.
 220  *
 221  * @frame: action frame data.
 222  * @frame_len: length of action frame data.
 223  *
 224  * Determine if action frame is p2p public action type
 225  */
 226 static bool brcmf_p2p_is_pub_action(void *frame, u32 frame_len)
 227 {
 228         struct brcmf_p2p_pub_act_frame *pact_frm;
 229
 230         if (frame == NULL)
 231                 return false;
 232
 233         pact_frm = (struct brcmf_p2p_pub_act_frame *)frame;
 234         if (frame_len < sizeof(struct brcmf_p2p_pub_act_frame) - 1)
 235                 return false;
 236
 237         if (pact_frm->category == P2P_PUB_AF_CATEGORY &&
 238             pact_frm->action == P2P_PUB_AF_ACTION &&
 239             pact_frm->oui_type == P2P_VER &&
 240             memcmp(pact_frm->oui, P2P_OUI, P2P_OUI_LEN) == 0)
 241                 return true;
 242
 243         return false;
 244 }
 245
 246 /**
 247  * brcmf_p2p_is_p2p_action() - true if p2p action type frame.
 248  *
 249  * @frame: action frame data.
 250  * @frame_len: length of action frame data.
 251  *
 252  * Determine if action frame is p2p action type
 253  */
 254 static bool brcmf_p2p_is_p2p_action(void *frame, u32 frame_len)
 255 {
 256         struct brcmf_p2p_action_frame *act_frm;
 257
 258         if (frame == NULL)
 259                 return false;
 260
 261         act_frm = (struct brcmf_p2p_action_frame *)frame;
 262         if (frame_len < sizeof(struct brcmf_p2p_action_frame) - 1)
 263                 return false;
 264
 265         if (act_frm->category == P2P_AF_CATEGORY &&
 266             act_frm->type  == P2P_VER &&
 267             memcmp(act_frm->oui, P2P_OUI, P2P_OUI_LEN) == 0)
 268                 return true;
 269
 270         return false;
 271 }
 272
 273 /**
 274  * brcmf_p2p_is_gas_action() - true if p2p gas action type frame.
 275  *
 276  * @frame: action frame data.
 277  * @frame_len: length of action frame data.
 278  *
 279  * Determine if action frame is p2p gas action type
 280  */
 281 static bool brcmf_p2p_is_gas_action(void *frame, u32 frame_len)
 282 {
 283         struct brcmf_p2psd_gas_pub_act_frame *sd_act_frm;
 284
 285         if (frame == NULL)
 286                 return false;
 287
 288         sd_act_frm = (struct brcmf_p2psd_gas_pub_act_frame *)frame;
 289         if (frame_len < sizeof(struct brcmf_p2psd_gas_pub_act_frame) - 1)
 290                 return false;
 291
 292         if (sd_act_frm->category != P2PSD_ACTION_CATEGORY)
 293                 return false;
 294
 295         if (sd_act_frm->action == P2PSD_ACTION_ID_GAS_IREQ ||
 296             sd_act_frm->action == P2PSD_ACTION_ID_GAS_IRESP ||
 297             sd_act_frm->action == P2PSD_ACTION_ID_GAS_CREQ ||
 298             sd_act_frm->action == P2PSD_ACTION_ID_GAS_CRESP)
 299                 return true;
 300
 301         return false;
 302 }
 303
 304 /**
 305  * brcmf_p2p_print_actframe() - debug print routine.
 306  *
 307  * @tx: Received or to be transmitted
 308  * @frame: action frame data.
 309  * @frame_len: length of action frame data.
 310  *
 311  * Print information about the p2p action frame
 312  */
 313
 314 #ifdef DEBUG
 315
 316 static void brcmf_p2p_print_actframe(bool tx, void *frame, u32 frame_len)
 317 {
 318         struct brcmf_p2p_pub_act_frame *pact_frm;
 319         struct brcmf_p2p_action_frame *act_frm;
 320         struct brcmf_p2psd_gas_pub_act_frame *sd_act_frm;
 321
 322         if (!frame || frame_len <= 2)
 323                 return;
 324
 325         if (brcmf_p2p_is_pub_action(frame, frame_len)) {
 326                 pact_frm = (struct brcmf_p2p_pub_act_frame *)frame;
 327                 switch (pact_frm->subtype) {
 328                 case P2P_PAF_GON_REQ:
 329                         brcmf_dbg(TRACE, "%s P2P Group Owner Negotiation Req Frame\n",
 330                                   (tx) ? "TX" : "RX");
 331                         break;
 332                 case P2P_PAF_GON_RSP:
 333                         brcmf_dbg(TRACE, "%s P2P Group Owner Negotiation Rsp Frame\n",
 334                                   (tx) ? "TX" : "RX");
 335                         break;
 336                 case P2P_PAF_GON_CONF:
 337                         brcmf_dbg(TRACE, "%s P2P Group Owner Negotiation Confirm Frame\n",
 338                                   (tx) ? "TX" : "RX");
 339                         break;
 340                 case P2P_PAF_INVITE_REQ:
 341                         brcmf_dbg(TRACE, "%s P2P Invitation Request  Frame\n",
 342                                   (tx) ? "TX" : "RX");
 343                         break;
 344                 case P2P_PAF_INVITE_RSP:
 345                         brcmf_dbg(TRACE, "%s P2P Invitation Response Frame\n",
 346                                   (tx) ? "TX" : "RX");
 347                         break;
 348                 case P2P_PAF_DEVDIS_REQ:
 349                         brcmf_dbg(TRACE, "%s P2P Device Discoverability Request Frame\n",
 350                                   (tx) ? "TX" : "RX");
 351                         break;
 352                 case P2P_PAF_DEVDIS_RSP:
 353                         brcmf_dbg(TRACE, "%s P2P Device Discoverability Response Frame\n",
 354                                   (tx) ? "TX" : "RX");
 355                         break;
 356                 case P2P_PAF_PROVDIS_REQ:
 357                         brcmf_dbg(TRACE, "%s P2P Provision Discovery Request Frame\n",
 358                                   (tx) ? "TX" : "RX");
 359                         break;
 360                 case P2P_PAF_PROVDIS_RSP:
 361                         brcmf_dbg(TRACE, "%s P2P Provision Discovery Response Frame\n",
 362                                   (tx) ? "TX" : "RX");
 363                         break;
 364                 default:
 365                         brcmf_dbg(TRACE, "%s Unknown P2P Public Action Frame\n",
 366                                   (tx) ? "TX" : "RX");
 367                         break;
 368                 }
 369         } else if (brcmf_p2p_is_p2p_action(frame, frame_len)) {
 370                 act_frm = (struct brcmf_p2p_action_frame *)frame;
 371                 switch (act_frm->subtype) {
 372                 case P2P_AF_NOTICE_OF_ABSENCE:
 373                         brcmf_dbg(TRACE, "%s P2P Notice of Absence Frame\n",
 374                                   (tx) ? "TX" : "RX");
 375                         break;
 376                 case P2P_AF_PRESENCE_REQ:
 377                         brcmf_dbg(TRACE, "%s P2P Presence Request Frame\n",
 378                                   (tx) ? "TX" : "RX");
 379                         break;
 380                 case P2P_AF_PRESENCE_RSP:
 381                         brcmf_dbg(TRACE, "%s P2P Presence Response Frame\n",
 382                                   (tx) ? "TX" : "RX");
 383                         break;
 384                 case P2P_AF_GO_DISC_REQ:
 385                         brcmf_dbg(TRACE, "%s P2P Discoverability Request Frame\n",
 386                                   (tx) ? "TX" : "RX");
 387                         break;
 388                 default:
 389                         brcmf_dbg(TRACE, "%s Unknown P2P Action Frame\n",
 390                                   (tx) ? "TX" : "RX");
 391                 }
 392
 393         } else if (brcmf_p2p_is_gas_action(frame, frame_len)) {
 394                 sd_act_frm = (struct brcmf_p2psd_gas_pub_act_frame *)frame;
 395                 switch (sd_act_frm->action) {
 396                 case P2PSD_ACTION_ID_GAS_IREQ:
 397                         brcmf_dbg(TRACE, "%s P2P GAS Initial Request\n",
 398                                   (tx) ? "TX" : "RX");
 399                         break;
 400                 case P2PSD_ACTION_ID_GAS_IRESP:
 401                         brcmf_dbg(TRACE, "%s P2P GAS Initial Response\n",
 402                                   (tx) ? "TX" : "RX");
 403                         break;
 404                 case P2PSD_ACTION_ID_GAS_CREQ:
 405                         brcmf_dbg(TRACE, "%s P2P GAS Comback Request\n",
 406                                   (tx) ? "TX" : "RX");
 407                         break;
 408                 case P2PSD_ACTION_ID_GAS_CRESP:
 409                         brcmf_dbg(TRACE, "%s P2P GAS Comback Response\n",
 410                                   (tx) ? "TX" : "RX");
 411                         break;
 412                 default:
 413                         brcmf_dbg(TRACE, "%s Unknown P2P GAS Frame\n",
 414                                   (tx) ? "TX" : "RX");
 415                         break;
 416                 }
 417         }
 418 }
 419
 420 #else
 421
 422 static void brcmf_p2p_print_actframe(bool tx, void *frame, u32 frame_len)
 423 {
 424 }
 425
 426 #endif
 427
 428
 429 /**
 430  * brcmf_p2p_set_firmware() - prepare firmware for peer-to-peer operation.
 431  *
 432  * @ifp: ifp to use for iovars (primary).
 433  * @p2p_mac: mac address to configure for p2p_da_override
 434  */
 435 static int brcmf_p2p_set_firmware(struct brcmf_if *ifp, u8 *p2p_mac)
 436 {
 437         s32 ret = 0;
 438
 439         brcmf_fil_cmd_int_set(ifp, BRCMF_C_DOWN, 1);
 440         brcmf_fil_iovar_int_set(ifp, "apsta", 1);
 441         brcmf_fil_cmd_int_set(ifp, BRCMF_C_UP, 1);
 442
 443         /* In case of COB type, firmware has default mac address
 444          * After Initializing firmware, we have to set current mac address to
 445          * firmware for P2P device address. This must be done with discovery
 446          * disabled.
 447          */
 448         brcmf_fil_iovar_int_set(ifp, "p2p_disc", 0);
 449
 450         ret = brcmf_fil_iovar_data_set(ifp, "p2p_da_override", p2p_mac,
 451                                        ETH_ALEN);
 452         if (ret)
 453                 brcmf_err("failed to update device address ret %d\n", ret);
 454
 455         return ret;
 456 }
 457
 458 /**
 459  * brcmf_p2p_generate_bss_mac() - derive mac addresses for P2P.
 460  *
 461  * @p2p: P2P specific data.
 462  * @dev_addr: optional device address.
 463  *
 464  * P2P needs mac addresses for P2P device and interface. If no device
 465  * address it specified, these are derived from a random ethernet
 466  * address.
 467  */
 468 static void brcmf_p2p_generate_bss_mac(struct brcmf_p2p_info *p2p, u8 *dev_addr)
 469 {
 470         bool random_addr = false;
 471
 472         if (!dev_addr || is_zero_ether_addr(dev_addr))
 473                 random_addr = true;
 474
 475         /* Generate the P2P Device Address obtaining a random ethernet
 476          * address with the locally administered bit set.
 477          */
 478         if (random_addr)
 479                 eth_random_addr(p2p->dev_addr);
 480         else
 481                 memcpy(p2p->dev_addr, dev_addr, ETH_ALEN);
 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  * @bss_type: type of P2P bss.
 628  */
 629 static s32 brcmf_p2p_escan(struct brcmf_p2p_info *p2p, u32 num_chans,
 630                            u16 chanspecs[], s32 search_state,
 631                            enum p2p_bss_type bss_type)
 632 {
 633         s32 ret = 0;
 634         s32 memsize = offsetof(struct brcmf_p2p_scan_le,
 635                                eparams.params_le.channel_list);
 636         s32 nprobes;
 637         s32 active;
 638         u32 i;
 639         u8 *memblk;
 640         struct brcmf_cfg80211_vif *vif;
 641         struct brcmf_p2p_scan_le *p2p_params;
 642         struct brcmf_scan_params_le *sparams;
 643
 644         memsize += num_chans * sizeof(__le16);
 645         memblk = kzalloc(memsize, GFP_KERNEL);
 646         if (!memblk)
 647                 return -ENOMEM;
 648
 649         vif = p2p->bss_idx[bss_type].vif;
 650         if (vif == NULL) {
 651                 brcmf_err("no vif for bss type %d\n", bss_type);
 652                 ret = -EINVAL;
 653                 goto exit;
 654         }
 655         p2p_params = (struct brcmf_p2p_scan_le *)memblk;
 656         sparams = &p2p_params->eparams.params_le;
 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, use
 663                  * null ssid, which it is already due to kzalloc.
 664                  */
 665                 break;
 666         case WL_P2P_DISC_ST_SCAN:
 667                 /*
 668                  * wpa_supplicant has p2p_find command with type social or
 669                  * progressive. For progressive, we need to set the ssid to
 670                  * P2P WILDCARD because we just do broadcast scan unless
 671                  * setting SSID.
 672                  */
 673                 sparams->ssid_le.SSID_len =
 674                                 cpu_to_le32(BRCMF_P2P_WILDCARD_SSID_LEN);
 675                 memcpy(sparams->ssid_le.SSID, BRCMF_P2P_WILDCARD_SSID,
 676                        BRCMF_P2P_WILDCARD_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->type = 'E';
 690
 691         /* determine the scan engine parameters */
 692         sparams->bss_type = DOT11_BSSTYPE_ANY;
 693         sparams->scan_type = BRCMF_SCANTYPE_ACTIVE;
 694
 695         eth_broadcast_addr(sparams->bssid);
 696         sparams->home_time = cpu_to_le32(P2PAPI_SCAN_HOME_TIME_MS);
 697
 698         /*
 699          * SOCIAL_CHAN_CNT + 1 takes care of the Progressive scan
 700          * supported by the supplicant.
 701          */
 702         if (num_chans == SOCIAL_CHAN_CNT || num_chans == (SOCIAL_CHAN_CNT + 1))
 703                 active = P2PAPI_SCAN_SOCIAL_DWELL_TIME_MS;
 704         else if (num_chans == AF_PEER_SEARCH_CNT)
 705                 active = P2PAPI_SCAN_AF_SEARCH_DWELL_TIME_MS;
 706         else if (brcmf_get_vif_state_any(p2p->cfg, BRCMF_VIF_STATUS_CONNECTED))
 707                 active = -1;
 708         else
 709                 active = P2PAPI_SCAN_DWELL_TIME_MS;
 710
 711         /* Override scan params to find a peer for a connection */
 712         if (num_chans == 1) {
 713                 active = WL_SCAN_CONNECT_DWELL_TIME_MS;
 714                 /* WAR to sync with presence period of VSDB GO.
 715                  * send probe request more frequently
 716                  */
 717                 nprobes = active / WL_SCAN_JOIN_PROBE_INTERVAL_MS;
 718         } else {
 719                 nprobes = active / P2PAPI_SCAN_NPROBS_TIME_MS;
 720         }
 721
 722         if (nprobes <= 0)
 723                 nprobes = 1;
 724
 725         brcmf_dbg(INFO, "nprobes # %d, active_time %d\n", nprobes, active);
 726         sparams->active_time = cpu_to_le32(active);
 727         sparams->nprobes = cpu_to_le32(nprobes);
 728         sparams->passive_time = cpu_to_le32(-1);
 729         sparams->channel_num = cpu_to_le32(num_chans &
 730                                            BRCMF_SCAN_PARAMS_COUNT_MASK);
 731         for (i = 0; i < num_chans; i++)
 732                 sparams->channel_list[i] = cpu_to_le16(chanspecs[i]);
 733
 734         /* set the escan specific parameters */
 735         p2p_params->eparams.version = cpu_to_le32(BRCMF_ESCAN_REQ_VERSION);
 736         p2p_params->eparams.action =  cpu_to_le16(WL_ESCAN_ACTION_START);
 737         p2p_params->eparams.sync_id = cpu_to_le16(0x1234);
 738         /* perform p2p scan on primary device */
 739         ret = brcmf_fil_bsscfg_data_set(vif->ifp, "p2p_scan", memblk, memsize);
 740         if (!ret)
 741                 set_bit(BRCMF_SCAN_STATUS_BUSY, &p2p->cfg->scan_status);
 742 exit:
 743         kfree(memblk);
 744         return ret;
 745 }
 746
 747 /**
 748  * brcmf_p2p_run_escan() - escan callback for peer-to-peer.
 749  *
 750  * @cfg: driver private data for cfg80211 interface.
 751  * @ndev: net device for which scan is requested.
 752  * @request: scan request from cfg80211.
 753  * @action: scan action.
 754  *
 755  * Determines the P2P discovery state based to scan request parameters and
 756  * validates the channels in the request.
 757  */
 758 static s32 brcmf_p2p_run_escan(struct brcmf_cfg80211_info *cfg,
 759                                struct brcmf_if *ifp,
 760                                struct cfg80211_scan_request *request)
 761 {
 762         struct brcmf_p2p_info *p2p = &cfg->p2p;
 763         s32 err = 0;
 764         s32 search_state = WL_P2P_DISC_ST_SCAN;
 765         struct brcmf_cfg80211_vif *vif;
 766         struct net_device *dev = NULL;
 767         int i, num_nodfs = 0;
 768         u16 *chanspecs;
 769
 770         brcmf_dbg(TRACE, "enter\n");
 771
 772         if (!request) {
 773                 err = -EINVAL;
 774                 goto exit;
 775         }
 776
 777         if (request->n_channels) {
 778                 chanspecs = kcalloc(request->n_channels, sizeof(*chanspecs),
 779                                     GFP_KERNEL);
 780                 if (!chanspecs) {
 781                         err = -ENOMEM;
 782                         goto exit;
 783                 }
 784                 vif = p2p->bss_idx[P2PAPI_BSSCFG_CONNECTION].vif;
 785                 if (vif)
 786                         dev = vif->wdev.netdev;
 787                 if (request->n_channels == 3 &&
 788                     request->channels[0]->hw_value == SOCIAL_CHAN_1 &&
 789                     request->channels[1]->hw_value == SOCIAL_CHAN_2 &&
 790                     request->channels[2]->hw_value == SOCIAL_CHAN_3) {
 791                         /* SOCIAL CHANNELS 1, 6, 11 */
 792                         search_state = WL_P2P_DISC_ST_SEARCH;
 793                         brcmf_dbg(INFO, "P2P SEARCH PHASE START\n");
 794                 } else if (dev != NULL &&
 795                            vif->wdev.iftype == NL80211_IFTYPE_P2P_GO) {
 796                         /* If you are already a GO, then do SEARCH only */
 797                         brcmf_dbg(INFO, "Already a GO. Do SEARCH Only\n");
 798                         search_state = WL_P2P_DISC_ST_SEARCH;
 799                 } else {
 800                         brcmf_dbg(INFO, "P2P SCAN STATE START\n");
 801                 }
 802
 803                 /*
 804                  * no P2P scanning on passive or DFS channels.
 805                  */
 806                 for (i = 0; i < request->n_channels; i++) {
 807                         struct ieee80211_channel *chan = request->channels[i];
 808
 809                         if (chan->flags & (IEEE80211_CHAN_RADAR |
 810                                            IEEE80211_CHAN_NO_IR))
 811                                 continue;
 812
 813                         chanspecs[i] = channel_to_chanspec(&p2p->cfg->d11inf,
 814                                                            chan);
 815                         brcmf_dbg(INFO, "%d: chan=%d, channel spec=%x\n",
 816                                   num_nodfs, chan->hw_value, chanspecs[i]);
 817                         num_nodfs++;
 818                 }
 819                 err = brcmf_p2p_escan(p2p, num_nodfs, chanspecs, search_state,
 820                                       P2PAPI_BSSCFG_DEVICE);
 821                 kfree(chanspecs);
 822         }
 823 exit:
 824         if (err)
 825                 brcmf_err("error (%d)\n", err);
 826         return err;
 827 }
 828
 829
 830 /**
 831  * brcmf_p2p_find_listen_channel() - find listen channel in ie string.
 832  *
 833  * @ie: string of information elements.
 834  * @ie_len: length of string.
 835  *
 836  * Scan ie for p2p ie and look for attribute 6 channel. If available determine
 837  * channel and return it.
 838  */
 839 static s32 brcmf_p2p_find_listen_channel(const u8 *ie, u32 ie_len)
 840 {
 841         u8 channel_ie[5];
 842         s32 listen_channel;
 843         s32 err;
 844
 845         err = cfg80211_get_p2p_attr(ie, ie_len,
 846                                     IEEE80211_P2P_ATTR_LISTEN_CHANNEL,
 847                                     channel_ie, sizeof(channel_ie));
 848         if (err < 0)
 849                 return err;
 850
 851         /* listen channel subel length format:     */
 852         /* 3(country) + 1(op. class) + 1(chan num) */
 853         listen_channel = (s32)channel_ie[3 + 1];
 854
 855         if (listen_channel == SOCIAL_CHAN_1 ||
 856             listen_channel == SOCIAL_CHAN_2 ||
 857             listen_channel == SOCIAL_CHAN_3) {
 858                 brcmf_dbg(INFO, "Found my Listen Channel %d\n", listen_channel);
 859                 return listen_channel;
 860         }
 861
 862         return -EPERM;
 863 }
 864
 865
 866 /**
 867  * brcmf_p2p_scan_prep() - prepare scan based on request.
 868  *
 869  * @wiphy: wiphy device.
 870  * @request: scan request from cfg80211.
 871  * @vif: vif on which scan request is to be executed.
 872  *
 873  * Prepare the scan appropriately for type of scan requested. Overrides the
 874  * escan .run() callback for peer-to-peer scanning.
 875  */
 876 int brcmf_p2p_scan_prep(struct wiphy *wiphy,
 877                         struct cfg80211_scan_request *request,
 878                         struct brcmf_cfg80211_vif *vif)
 879 {
 880         struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
 881         struct brcmf_p2p_info *p2p = &cfg->p2p;
 882         int err;
 883
 884         if (brcmf_p2p_scan_is_p2p_request(request)) {
 885                 /* find my listen channel */
 886                 err = brcmf_p2p_find_listen_channel(request->ie,
 887                                                     request->ie_len);
 888                 if (err < 0)
 889                         return err;
 890
 891                 p2p->afx_hdl.my_listen_chan = err;
 892
 893                 clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status);
 894                 brcmf_dbg(INFO, "P2P: GO_NEG_PHASE status cleared\n");
 895
 896                 err = brcmf_p2p_enable_discovery(p2p);
 897                 if (err)
 898                         return err;
 899
 900                 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif;
 901
 902                 /* override .run_escan() callback. */
 903                 cfg->escan_info.run = brcmf_p2p_run_escan;
 904         }
 905         return 0;
 906 }
 907
 908
 909 /**
 910  * brcmf_p2p_discover_listen() - set firmware to discover listen state.
 911  *
 912  * @p2p: p2p device.
 913  * @channel: channel nr for discover listen.
 914  * @duration: time in ms to stay on channel.
 915  *
 916  */
 917 static s32
 918 brcmf_p2p_discover_listen(struct brcmf_p2p_info *p2p, u16 channel, u32 duration)
 919 {
 920         struct brcmf_cfg80211_vif *vif;
 921         struct brcmu_chan ch;
 922         s32 err = 0;
 923
 924         vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif;
 925         if (!vif) {
 926                 brcmf_err("Discovery is not set, so we have nothing to do\n");
 927                 err = -EPERM;
 928                 goto exit;
 929         }
 930
 931         if (test_bit(BRCMF_P2P_STATUS_DISCOVER_LISTEN, &p2p->status)) {
 932                 brcmf_err("Previous LISTEN is not completed yet\n");
 933                 /* WAR: prevent cookie mismatch in wpa_supplicant return OK */
 934                 goto exit;
 935         }
 936
 937         ch.chnum = channel;
 938         ch.bw = BRCMU_CHAN_BW_20;
 939         p2p->cfg->d11inf.encchspec(&ch);
 940         err = brcmf_p2p_set_discover_state(vif->ifp, WL_P2P_DISC_ST_LISTEN,
 941                                            ch.chspec, (u16)duration);
 942         if (!err) {
 943                 set_bit(BRCMF_P2P_STATUS_DISCOVER_LISTEN, &p2p->status);
 944                 p2p->remain_on_channel_cookie++;
 945         }
 946 exit:
 947         return err;
 948 }
 949
 950
 951 /**
 952  * brcmf_p2p_remain_on_channel() - put device on channel and stay there.
 953  *
 954  * @wiphy: wiphy device.
 955  * @channel: channel to stay on.
 956  * @duration: time in ms to remain on channel.
 957  *
 958  */
 959 int brcmf_p2p_remain_on_channel(struct wiphy *wiphy, struct wireless_dev *wdev,
 960                                 struct ieee80211_channel *channel,
 961                                 unsigned int duration, u64 *cookie)
 962 {
 963         struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
 964         struct brcmf_p2p_info *p2p = &cfg->p2p;
 965         s32 err;
 966         u16 channel_nr;
 967
 968         channel_nr = ieee80211_frequency_to_channel(channel->center_freq);
 969         brcmf_dbg(TRACE, "Enter, channel: %d, duration ms (%d)\n", channel_nr,
 970                   duration);
 971
 972         err = brcmf_p2p_enable_discovery(p2p);
 973         if (err)
 974                 goto exit;
 975         err = brcmf_p2p_discover_listen(p2p, channel_nr, duration);
 976         if (err)
 977                 goto exit;
 978
 979         memcpy(&p2p->remain_on_channel, channel, sizeof(*channel));
 980         *cookie = p2p->remain_on_channel_cookie;
 981         cfg80211_ready_on_channel(wdev, *cookie, channel, duration, GFP_KERNEL);
 982
 983 exit:
 984         return err;
 985 }
 986
 987
 988 /**
 989  * brcmf_p2p_notify_listen_complete() - p2p listen has completed.
 990  *
 991  * @ifp: interfac control.
 992  * @e: event message. Not used, to make it usable for fweh event dispatcher.
 993  * @data: payload of message. Not used.
 994  *
 995  */
 996 int brcmf_p2p_notify_listen_complete(struct brcmf_if *ifp,
 997                                      const struct brcmf_event_msg *e,
 998                                      void *data)
 999 {
1000         struct brcmf_cfg80211_info *cfg = ifp->drvr->config;
1001         struct brcmf_p2p_info *p2p = &cfg->p2p;
1002
1003         brcmf_dbg(TRACE, "Enter\n");
1004         if (test_and_clear_bit(BRCMF_P2P_STATUS_DISCOVER_LISTEN,
1005                                &p2p->status)) {
1006                 if (test_and_clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_AF_LISTEN,
1007                                        &p2p->status)) {
1008                         clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME,
1009                                   &p2p->status);
1010                         brcmf_dbg(INFO, "Listen DONE, wake up wait_next_af\n");
1011                         complete(&p2p->wait_next_af);
1012                 }
1013
1014                 cfg80211_remain_on_channel_expired(&ifp->vif->wdev,
1015                                                    p2p->remain_on_channel_cookie,
1016                                                    &p2p->remain_on_channel,
1017                                                    GFP_KERNEL);
1018         }
1019         return 0;
1020 }
1021
1022
1023 /**
1024  * brcmf_p2p_cancel_remain_on_channel() - cancel p2p listen state.
1025  *
1026  * @ifp: interfac control.
1027  *
1028  */
1029 void brcmf_p2p_cancel_remain_on_channel(struct brcmf_if *ifp)
1030 {
1031         if (!ifp)
1032                 return;
1033         brcmf_p2p_set_discover_state(ifp, WL_P2P_DISC_ST_SCAN, 0, 0);
1034         brcmf_p2p_notify_listen_complete(ifp, NULL, NULL);
1035 }
1036
1037
1038 /**
1039  * brcmf_p2p_act_frm_search() - search function for action frame.
1040  *
1041  * @p2p: p2p device.
1042  * channel: channel on which action frame is to be trasmitted.
1043  *
1044  * search function to reach at common channel to send action frame. When
1045  * channel is 0 then all social channels will be used to send af
1046  */
1047 static s32 brcmf_p2p_act_frm_search(struct brcmf_p2p_info *p2p, u16 channel)
1048 {
1049         s32 err;
1050         u32 channel_cnt;
1051         u16 *default_chan_list;
1052         u32 i;
1053         struct brcmu_chan ch;
1054
1055         brcmf_dbg(TRACE, "Enter\n");
1056
1057         if (channel)
1058                 channel_cnt = AF_PEER_SEARCH_CNT;
1059         else
1060                 channel_cnt = SOCIAL_CHAN_CNT;
1061         default_chan_list = kcalloc(channel_cnt, sizeof(*default_chan_list),
1062                                     GFP_KERNEL);
1063         if (default_chan_list == NULL) {
1064                 brcmf_err("channel list allocation failed\n");
1065                 err = -ENOMEM;
1066                 goto exit;
1067         }
1068         ch.bw = BRCMU_CHAN_BW_20;
1069         if (channel) {
1070                 ch.chnum = channel;
1071                 p2p->cfg->d11inf.encchspec(&ch);
1072                 /* insert same channel to the chan_list */
1073                 for (i = 0; i < channel_cnt; i++)
1074                         default_chan_list[i] = ch.chspec;
1075         } else {
1076                 ch.chnum = SOCIAL_CHAN_1;
1077                 p2p->cfg->d11inf.encchspec(&ch);
1078                 default_chan_list[0] = ch.chspec;
1079                 ch.chnum = SOCIAL_CHAN_2;
1080                 p2p->cfg->d11inf.encchspec(&ch);
1081                 default_chan_list[1] = ch.chspec;
1082                 ch.chnum = SOCIAL_CHAN_3;
1083                 p2p->cfg->d11inf.encchspec(&ch);
1084                 default_chan_list[2] = ch.chspec;
1085         }
1086         err = brcmf_p2p_escan(p2p, channel_cnt, default_chan_list,
1087                               WL_P2P_DISC_ST_SEARCH, P2PAPI_BSSCFG_DEVICE);
1088         kfree(default_chan_list);
1089 exit:
1090         return err;
1091 }
1092
1093
1094 /**
1095  * brcmf_p2p_afx_handler() - afx worker thread.
1096  *
1097  * @work:
1098  *
1099  */
1100 static void brcmf_p2p_afx_handler(struct work_struct *work)
1101 {
1102         struct afx_hdl *afx_hdl = container_of(work, struct afx_hdl, afx_work);
1103         struct brcmf_p2p_info *p2p = container_of(afx_hdl,
1104                                                   struct brcmf_p2p_info,
1105                                                   afx_hdl);
1106         s32 err;
1107
1108         if (!afx_hdl->is_active)
1109                 return;
1110
1111         if (afx_hdl->is_listen && afx_hdl->my_listen_chan)
1112                 /* 100ms ~ 300ms */
1113                 err = brcmf_p2p_discover_listen(p2p, afx_hdl->my_listen_chan,
1114                                                 100 * (1 + prandom_u32() % 3));
1115         else
1116                 err = brcmf_p2p_act_frm_search(p2p, afx_hdl->peer_listen_chan);
1117
1118         if (err) {
1119                 brcmf_err("ERROR occurred! value is (%d)\n", err);
1120                 if (test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL,
1121                              &p2p->status))
1122                         complete(&afx_hdl->act_frm_scan);
1123         }
1124 }
1125
1126
1127 /**
1128  * brcmf_p2p_af_searching_channel() - search channel.
1129  *
1130  * @p2p: p2p device info struct.
1131  *
1132  */
1133 static s32 brcmf_p2p_af_searching_channel(struct brcmf_p2p_info *p2p)
1134 {
1135         struct afx_hdl *afx_hdl = &p2p->afx_hdl;
1136         struct brcmf_cfg80211_vif *pri_vif;
1137         s32 retry;
1138
1139         brcmf_dbg(TRACE, "Enter\n");
1140
1141         pri_vif = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif;
1142
1143         reinit_completion(&afx_hdl->act_frm_scan);
1144         set_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status);
1145         afx_hdl->is_active = true;
1146         afx_hdl->peer_chan = P2P_INVALID_CHANNEL;
1147
1148         /* Loop to wait until we find a peer's channel or the
1149          * pending action frame tx is cancelled.
1150          */
1151         retry = 0;
1152         while ((retry < P2P_CHANNEL_SYNC_RETRY) &&
1153                (afx_hdl->peer_chan == P2P_INVALID_CHANNEL)) {
1154                 afx_hdl->is_listen = false;
1155                 brcmf_dbg(TRACE, "Scheduling action frame for sending.. (%d)\n",
1156                           retry);
1157                 /* search peer on peer's listen channel */
1158                 schedule_work(&afx_hdl->afx_work);
1159                 wait_for_completion_timeout(&afx_hdl->act_frm_scan,
1160                                             P2P_AF_FRM_SCAN_MAX_WAIT);
1161                 if ((afx_hdl->peer_chan != P2P_INVALID_CHANNEL) ||
1162                     (!test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL,
1163                                &p2p->status)))
1164                         break;
1165
1166                 if (afx_hdl->my_listen_chan) {
1167                         brcmf_dbg(TRACE, "Scheduling listen peer, channel=%d\n",
1168                                   afx_hdl->my_listen_chan);
1169                         /* listen on my listen channel */
1170                         afx_hdl->is_listen = true;
1171                         schedule_work(&afx_hdl->afx_work);
1172                         wait_for_completion_timeout(&afx_hdl->act_frm_scan,
1173                                                     P2P_AF_FRM_SCAN_MAX_WAIT);
1174                 }
1175                 if ((afx_hdl->peer_chan != P2P_INVALID_CHANNEL) ||
1176                     (!test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL,
1177                                &p2p->status)))
1178                         break;
1179                 retry++;
1180
1181                 /* if sta is connected or connecting, sleep for a while before
1182                  * retry af tx or finding a peer
1183                  */
1184                 if (test_bit(BRCMF_VIF_STATUS_CONNECTED, &pri_vif->sme_state) ||
1185                     test_bit(BRCMF_VIF_STATUS_CONNECTING, &pri_vif->sme_state))
1186                         msleep(P2P_DEFAULT_SLEEP_TIME_VSDB);
1187         }
1188
1189         brcmf_dbg(TRACE, "Completed search/listen peer_chan=%d\n",
1190                   afx_hdl->peer_chan);
1191         afx_hdl->is_active = false;
1192
1193         clear_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status);
1194
1195         return afx_hdl->peer_chan;
1196 }
1197
1198
1199 /**
1200  * brcmf_p2p_scan_finding_common_channel() - was escan used for finding channel
1201  *
1202  * @cfg: common configuration struct.
1203  * @bi: bss info struct, result from scan.
1204  *
1205  */
1206 bool brcmf_p2p_scan_finding_common_channel(struct brcmf_cfg80211_info *cfg,
1207                                            struct brcmf_bss_info_le *bi)
1208
1209 {
1210         struct brcmf_p2p_info *p2p = &cfg->p2p;
1211         struct afx_hdl *afx_hdl = &p2p->afx_hdl;
1212         struct brcmu_chan ch;
1213         u8 *ie;
1214         s32 err;
1215         u8 p2p_dev_addr[ETH_ALEN];
1216
1217         if (!test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status))
1218                 return false;
1219
1220         if (bi == NULL) {
1221                 brcmf_dbg(TRACE, "ACTION FRAME SCAN Done\n");
1222                 if (afx_hdl->peer_chan == P2P_INVALID_CHANNEL)
1223                         complete(&afx_hdl->act_frm_scan);
1224                 return true;
1225         }
1226
1227         ie = ((u8 *)bi) + le16_to_cpu(bi->ie_offset);
1228         memset(p2p_dev_addr, 0, sizeof(p2p_dev_addr));
1229         err = cfg80211_get_p2p_attr(ie, le32_to_cpu(bi->ie_length),
1230                                     IEEE80211_P2P_ATTR_DEVICE_INFO,
1231                                     p2p_dev_addr, sizeof(p2p_dev_addr));
1232         if (err < 0)
1233                 err = cfg80211_get_p2p_attr(ie, le32_to_cpu(bi->ie_length),
1234                                             IEEE80211_P2P_ATTR_DEVICE_ID,
1235                                             p2p_dev_addr, sizeof(p2p_dev_addr));
1236         if ((err >= 0) &&
1237             (ether_addr_equal(p2p_dev_addr, afx_hdl->tx_dst_addr))) {
1238                 if (!bi->ctl_ch) {
1239                         ch.chspec = le16_to_cpu(bi->chanspec);
1240                         cfg->d11inf.decchspec(&ch);
1241                         bi->ctl_ch = ch.control_ch_num;
1242                 }
1243                 afx_hdl->peer_chan = bi->ctl_ch;
1244                 brcmf_dbg(TRACE, "ACTION FRAME SCAN : Peer %pM found, channel : %d\n",
1245                           afx_hdl->tx_dst_addr, afx_hdl->peer_chan);
1246                 complete(&afx_hdl->act_frm_scan);
1247         }
1248         return true;
1249 }
1250
1251 /**
1252  * brcmf_p2p_stop_wait_next_action_frame() - finish scan if af tx complete.
1253  *
1254  * @cfg: common configuration struct.
1255  *
1256  */
1257 static void
1258 brcmf_p2p_stop_wait_next_action_frame(struct brcmf_cfg80211_info *cfg)
1259 {
1260         struct brcmf_p2p_info *p2p = &cfg->p2p;
1261         struct brcmf_if *ifp = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->ifp;
1262
1263         if (test_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status) &&
1264             (test_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status) ||
1265              test_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status))) {
1266                 brcmf_dbg(TRACE, "*** Wake UP ** abort actframe iovar\n");
1267                 /* if channel is not zero, "actfame" uses off channel scan.
1268                  * So abort scan for off channel completion.
1269                  */
1270                 if (p2p->af_sent_channel)
1271                         brcmf_notify_escan_complete(cfg, ifp, true, true);
1272         } else if (test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_AF_LISTEN,
1273                             &p2p->status)) {
1274                 brcmf_dbg(TRACE, "*** Wake UP ** abort listen for next af frame\n");
1275                 /* So abort scan to cancel listen */
1276                 brcmf_notify_escan_complete(cfg, ifp, true, true);
1277         }
1278 }
1279
1280
1281 /**
1282  * brcmf_p2p_gon_req_collision() - Check if go negotiaton collission
1283  *
1284  * @p2p: p2p device info struct.
1285  *
1286  * return true if recevied action frame is to be dropped.
1287  */
1288 static bool
1289 brcmf_p2p_gon_req_collision(struct brcmf_p2p_info *p2p, u8 *mac)
1290 {
1291         struct brcmf_cfg80211_info *cfg = p2p->cfg;
1292         struct brcmf_if *ifp;
1293
1294         brcmf_dbg(TRACE, "Enter\n");
1295
1296         if (!test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status) ||
1297             !p2p->gon_req_action)
1298                 return false;
1299
1300         brcmf_dbg(TRACE, "GO Negotiation Request COLLISION !!!\n");
1301         /* if sa(peer) addr is less than da(my) addr, then this device
1302          * process peer's gon request and block to send gon req.
1303          * if not (sa addr > da addr),
1304          * this device will process gon request and drop gon req of peer.
1305          */
1306         ifp = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif->ifp;
1307         if (memcmp(mac, ifp->mac_addr, ETH_ALEN) < 0) {
1308                 brcmf_dbg(INFO, "Block transmit gon req !!!\n");
1309                 p2p->block_gon_req_tx = true;
1310                 /* if we are finding a common channel for sending af,
1311                  * do not scan more to block to send current gon req
1312                  */
1313                 if (test_and_clear_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL,
1314                                        &p2p->status))
1315                         complete(&p2p->afx_hdl.act_frm_scan);
1316                 if (test_and_clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME,
1317                                        &p2p->status))
1318                         brcmf_p2p_stop_wait_next_action_frame(cfg);
1319                 return false;
1320         }
1321
1322         /* drop gon request of peer to process gon request by this device. */
1323         brcmf_dbg(INFO, "Drop received gon req !!!\n");
1324
1325         return true;
1326 }
1327
1328
1329 /**
1330  * brcmf_p2p_notify_action_frame_rx() - received action frame.
1331  *
1332  * @ifp: interfac control.
1333  * @e: event message. Not used, to make it usable for fweh event dispatcher.
1334  * @data: payload of message, containing action frame data.
1335  *
1336  */
1337 int brcmf_p2p_notify_action_frame_rx(struct brcmf_if *ifp,
1338                                      const struct brcmf_event_msg *e,
1339                                      void *data)
1340 {
1341         struct brcmf_cfg80211_info *cfg = ifp->drvr->config;
1342         struct brcmf_p2p_info *p2p = &cfg->p2p;
1343         struct afx_hdl *afx_hdl = &p2p->afx_hdl;
1344         struct wireless_dev *wdev;
1345         u32 mgmt_frame_len = e->datalen - sizeof(struct brcmf_rx_mgmt_data);
1346         struct brcmf_rx_mgmt_data *rxframe = (struct brcmf_rx_mgmt_data *)data;
1347         u8 *frame = (u8 *)(rxframe + 1);
1348         struct brcmf_p2p_pub_act_frame *act_frm;
1349         struct brcmf_p2psd_gas_pub_act_frame *sd_act_frm;
1350         struct brcmu_chan ch;
1351         struct ieee80211_mgmt *mgmt_frame;
1352         s32 freq;
1353         u16 mgmt_type;
1354         u8 action;
1355
1356         if (e->datalen < sizeof(*rxframe)) {
1357                 brcmf_dbg(SCAN, "Event data to small. Ignore\n");
1358                 return 0;
1359         }
1360
1361         ch.chspec = be16_to_cpu(rxframe->chanspec);
1362         cfg->d11inf.decchspec(&ch);
1363         /* Check if wpa_supplicant has registered for this frame */
1364         brcmf_dbg(INFO, "ifp->vif->mgmt_rx_reg %04x\n", ifp->vif->mgmt_rx_reg);
1365         mgmt_type = (IEEE80211_STYPE_ACTION & IEEE80211_FCTL_STYPE) >> 4;
1366         if ((ifp->vif->mgmt_rx_reg & BIT(mgmt_type)) == 0)
1367                 return 0;
1368
1369         brcmf_p2p_print_actframe(false, frame, mgmt_frame_len);
1370
1371         action = P2P_PAF_SUBTYPE_INVALID;
1372         if (brcmf_p2p_is_pub_action(frame, mgmt_frame_len)) {
1373                 act_frm = (struct brcmf_p2p_pub_act_frame *)frame;
1374                 action = act_frm->subtype;
1375                 if ((action == P2P_PAF_GON_REQ) &&
1376                     (brcmf_p2p_gon_req_collision(p2p, (u8 *)e->addr))) {
1377                         if (test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL,
1378                                      &p2p->status) &&
1379                             (ether_addr_equal(afx_hdl->tx_dst_addr, e->addr))) {
1380                                 afx_hdl->peer_chan = ch.control_ch_num;
1381                                 brcmf_dbg(INFO, "GON request: Peer found, channel=%d\n",
1382                                           afx_hdl->peer_chan);
1383                                 complete(&afx_hdl->act_frm_scan);
1384                         }
1385                         return 0;
1386                 }
1387                 /* After complete GO Negotiation, roll back to mpc mode */
1388                 if ((action == P2P_PAF_GON_CONF) ||
1389                     (action == P2P_PAF_PROVDIS_RSP))
1390                         brcmf_set_mpc(ifp, 1);
1391                 if (action == P2P_PAF_GON_CONF) {
1392                         brcmf_dbg(TRACE, "P2P: GO_NEG_PHASE status cleared\n");
1393                         clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status);
1394                 }
1395         } else if (brcmf_p2p_is_gas_action(frame, mgmt_frame_len)) {
1396                 sd_act_frm = (struct brcmf_p2psd_gas_pub_act_frame *)frame;
1397                 action = sd_act_frm->action;
1398         }
1399
1400         if (test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status) &&
1401             (p2p->next_af_subtype == action)) {
1402                 brcmf_dbg(TRACE, "We got a right next frame! (%d)\n", action);
1403                 clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME,
1404                           &p2p->status);
1405                 /* Stop waiting for next AF. */
1406                 brcmf_p2p_stop_wait_next_action_frame(cfg);
1407         }
1408
1409         mgmt_frame = kzalloc(offsetof(struct ieee80211_mgmt, u) +
1410                              mgmt_frame_len, GFP_KERNEL);
1411         if (!mgmt_frame) {
1412                 brcmf_err("No memory available for action frame\n");
1413                 return -ENOMEM;
1414         }
1415         memcpy(mgmt_frame->da, ifp->mac_addr, ETH_ALEN);
1416         brcmf_fil_cmd_data_get(ifp, BRCMF_C_GET_BSSID, mgmt_frame->bssid,
1417                                ETH_ALEN);
1418         memcpy(mgmt_frame->sa, e->addr, ETH_ALEN);
1419         mgmt_frame->frame_control = cpu_to_le16(IEEE80211_STYPE_ACTION);
1420         memcpy(&mgmt_frame->u, frame, mgmt_frame_len);
1421         mgmt_frame_len += offsetof(struct ieee80211_mgmt, u);
1422
1423         freq = ieee80211_channel_to_frequency(ch.control_ch_num,
1424                                               ch.band == BRCMU_CHAN_BAND_2G ?
1425                                               NL80211_BAND_2GHZ :
1426                                               NL80211_BAND_5GHZ);
1427
1428         wdev = &ifp->vif->wdev;
1429         cfg80211_rx_mgmt(wdev, freq, 0, (u8 *)mgmt_frame, mgmt_frame_len, 0);
1430
1431         kfree(mgmt_frame);
1432         return 0;
1433 }
1434
1435
1436 /**
1437  * brcmf_p2p_notify_action_tx_complete() - transmit action frame complete
1438  *
1439  * @ifp: interfac control.
1440  * @e: event message. Not used, to make it usable for fweh event dispatcher.
1441  * @data: not used.
1442  *
1443  */
1444 int brcmf_p2p_notify_action_tx_complete(struct brcmf_if *ifp,
1445                                         const struct brcmf_event_msg *e,
1446                                         void *data)
1447 {
1448         struct brcmf_cfg80211_info *cfg = ifp->drvr->config;
1449         struct brcmf_p2p_info *p2p = &cfg->p2p;
1450
1451         brcmf_dbg(INFO, "Enter: event %s, status=%d\n",
1452                   e->event_code == BRCMF_E_ACTION_FRAME_OFF_CHAN_COMPLETE ?
1453                   "ACTION_FRAME_OFF_CHAN_COMPLETE" : "ACTION_FRAME_COMPLETE",
1454                   e->status);
1455
1456         if (!test_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status))
1457                 return 0;
1458
1459         if (e->event_code == BRCMF_E_ACTION_FRAME_COMPLETE) {
1460                 if (e->status == BRCMF_E_STATUS_SUCCESS) {
1461                         set_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED,
1462                                 &p2p->status);
1463                         if (!p2p->wait_for_offchan_complete)
1464                                 complete(&p2p->send_af_done);
1465                 } else {
1466                         set_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status);
1467                         /* If there is no ack, we don't need to wait for
1468                          * WLC_E_ACTION_FRAME_OFFCHAN_COMPLETE event
1469                          */
1470                         brcmf_p2p_stop_wait_next_action_frame(cfg);
1471                 }
1472
1473         } else {
1474                 complete(&p2p->send_af_done);
1475         }
1476         return 0;
1477 }
1478
1479
1480 /**
1481  * brcmf_p2p_tx_action_frame() - send action frame over fil.
1482  *
1483  * @p2p: p2p info struct for vif.
1484  * @af_params: action frame data/info.
1485  *
1486  * Send an action frame immediately without doing channel synchronization.
1487  *
1488  * This function waits for a completion event before returning.
1489  * The WLC_E_ACTION_FRAME_COMPLETE event will be received when the action
1490  * frame is transmitted.
1491  */
1492 static s32 brcmf_p2p_tx_action_frame(struct brcmf_p2p_info *p2p,
1493                                      struct brcmf_fil_af_params_le *af_params)
1494 {
1495         struct brcmf_cfg80211_vif *vif;
1496         s32 err = 0;
1497         s32 timeout = 0;
1498
1499         brcmf_dbg(TRACE, "Enter\n");
1500
1501         reinit_completion(&p2p->send_af_done);
1502         clear_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status);
1503         clear_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status);
1504
1505         vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif;
1506         err = brcmf_fil_bsscfg_data_set(vif->ifp, "actframe", af_params,
1507                                         sizeof(*af_params));
1508         if (err) {
1509                 brcmf_err(" sending action frame has failed\n");
1510                 goto exit;
1511         }
1512
1513         p2p->af_sent_channel = le32_to_cpu(af_params->channel);
1514         p2p->af_tx_sent_jiffies = jiffies;
1515
1516         if (test_bit(BRCMF_P2P_STATUS_DISCOVER_LISTEN, &p2p->status) &&
1517             p2p->af_sent_channel ==
1518             ieee80211_frequency_to_channel(p2p->remain_on_channel.center_freq))
1519                 p2p->wait_for_offchan_complete = false;
1520         else
1521                 p2p->wait_for_offchan_complete = true;
1522
1523         brcmf_dbg(TRACE, "Waiting for %s tx completion event\n",
1524                   (p2p->wait_for_offchan_complete) ?
1525                    "off-channel" : "on-channel");
1526
1527         timeout = wait_for_completion_timeout(&p2p->send_af_done,
1528                                               P2P_AF_MAX_WAIT_TIME);
1529
1530         if (test_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status)) {
1531                 brcmf_dbg(TRACE, "TX action frame operation is success\n");
1532         } else {
1533                 err = -EIO;
1534                 brcmf_dbg(TRACE, "TX action frame operation has failed\n");
1535         }
1536         /* clear status bit for action tx */
1537         clear_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status);
1538         clear_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status);
1539
1540 exit:
1541         return err;
1542 }
1543
1544
1545 /**
1546  * brcmf_p2p_pub_af_tx() - public action frame tx routine.
1547  *
1548  * @cfg: driver private data for cfg80211 interface.
1549  * @af_params: action frame data/info.
1550  * @config_af_params: configuration data for action frame.
1551  *
1552  * routine which transmits ation frame public type.
1553  */
1554 static s32 brcmf_p2p_pub_af_tx(struct brcmf_cfg80211_info *cfg,
1555                                struct brcmf_fil_af_params_le *af_params,
1556                                struct brcmf_config_af_params *config_af_params)
1557 {
1558         struct brcmf_p2p_info *p2p = &cfg->p2p;
1559         struct brcmf_fil_action_frame_le *action_frame;
1560         struct brcmf_p2p_pub_act_frame *act_frm;
1561         s32 err = 0;
1562         u16 ie_len;
1563
1564         action_frame = &af_params->action_frame;
1565         act_frm = (struct brcmf_p2p_pub_act_frame *)(action_frame->data);
1566
1567         config_af_params->extra_listen = true;
1568
1569         switch (act_frm->subtype) {
1570         case P2P_PAF_GON_REQ:
1571                 brcmf_dbg(TRACE, "P2P: GO_NEG_PHASE status set\n");
1572                 set_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status);
1573                 config_af_params->mpc_onoff = 0;
1574                 config_af_params->search_channel = true;
1575                 p2p->next_af_subtype = act_frm->subtype + 1;
1576                 p2p->gon_req_action = true;
1577                 /* increase dwell time to wait for RESP frame */
1578                 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME);
1579                 break;
1580         case P2P_PAF_GON_RSP:
1581                 p2p->next_af_subtype = act_frm->subtype + 1;
1582                 /* increase dwell time to wait for CONF frame */
1583                 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME);
1584                 break;
1585         case P2P_PAF_GON_CONF:
1586                 /* If we reached till GO Neg confirmation reset the filter */
1587                 brcmf_dbg(TRACE, "P2P: GO_NEG_PHASE status cleared\n");
1588                 clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status);
1589                 /* turn on mpc again if go nego is done */
1590                 config_af_params->mpc_onoff = 1;
1591                 /* minimize dwell time */
1592                 af_params->dwell_time = cpu_to_le32(P2P_AF_MIN_DWELL_TIME);
1593                 config_af_params->extra_listen = false;
1594                 break;
1595         case P2P_PAF_INVITE_REQ:
1596                 config_af_params->search_channel = true;
1597                 p2p->next_af_subtype = act_frm->subtype + 1;
1598                 /* increase dwell time */
1599                 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME);
1600                 break;
1601         case P2P_PAF_INVITE_RSP:
1602                 /* minimize dwell time */
1603                 af_params->dwell_time = cpu_to_le32(P2P_AF_MIN_DWELL_TIME);
1604                 config_af_params->extra_listen = false;
1605                 break;
1606         case P2P_PAF_DEVDIS_REQ:
1607                 config_af_params->search_channel = true;
1608                 p2p->next_af_subtype = act_frm->subtype + 1;
1609                 /* maximize dwell time to wait for RESP frame */
1610                 af_params->dwell_time = cpu_to_le32(P2P_AF_LONG_DWELL_TIME);
1611                 break;
1612         case P2P_PAF_DEVDIS_RSP:
1613                 /* minimize dwell time */
1614                 af_params->dwell_time = cpu_to_le32(P2P_AF_MIN_DWELL_TIME);
1615                 config_af_params->extra_listen = false;
1616                 break;
1617         case P2P_PAF_PROVDIS_REQ:
1618                 ie_len = le16_to_cpu(action_frame->len) -
1619                          offsetof(struct brcmf_p2p_pub_act_frame, elts);
1620                 if (cfg80211_get_p2p_attr(&act_frm->elts[0], ie_len,
1621                                           IEEE80211_P2P_ATTR_GROUP_ID,
1622                                           NULL, 0) < 0)
1623                         config_af_params->search_channel = true;
1624                 config_af_params->mpc_onoff = 0;
1625                 p2p->next_af_subtype = act_frm->subtype + 1;
1626                 /* increase dwell time to wait for RESP frame */
1627                 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME);
1628                 break;
1629         case P2P_PAF_PROVDIS_RSP:
1630                 /* wpa_supplicant send go nego req right after prov disc */
1631                 p2p->next_af_subtype = P2P_PAF_GON_REQ;
1632                 /* increase dwell time to MED level */
1633                 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME);
1634                 config_af_params->extra_listen = false;
1635                 break;
1636         default:
1637                 brcmf_err("Unknown p2p pub act frame subtype: %d\n",
1638                           act_frm->subtype);
1639                 err = -EINVAL;
1640         }
1641         return err;
1642 }
1643
1644 /**
1645  * brcmf_p2p_send_action_frame() - send action frame .
1646  *
1647  * @cfg: driver private data for cfg80211 interface.
1648  * @ndev: net device to transmit on.
1649  * @af_params: configuration data for action frame.
1650  */
1651 bool brcmf_p2p_send_action_frame(struct brcmf_cfg80211_info *cfg,
1652                                  struct net_device *ndev,
1653                                  struct brcmf_fil_af_params_le *af_params)
1654 {
1655         struct brcmf_p2p_info *p2p = &cfg->p2p;
1656         struct brcmf_if *ifp = netdev_priv(ndev);
1657         struct brcmf_fil_action_frame_le *action_frame;
1658         struct brcmf_config_af_params config_af_params;
1659         struct afx_hdl *afx_hdl = &p2p->afx_hdl;
1660         u16 action_frame_len;
1661         bool ack = false;
1662         u8 category;
1663         u8 action;
1664         s32 tx_retry;
1665         s32 extra_listen_time;
1666         uint delta_ms;
1667
1668         action_frame = &af_params->action_frame;
1669         action_frame_len = le16_to_cpu(action_frame->len);
1670
1671         brcmf_p2p_print_actframe(true, action_frame->data, action_frame_len);
1672
1673         /* Add the default dwell time. Dwell time to stay off-channel */
1674         /* to wait for a response action frame after transmitting an  */
1675         /* GO Negotiation action frame                                */
1676         af_params->dwell_time = cpu_to_le32(P2P_AF_DWELL_TIME);
1677
1678         category = action_frame->data[DOT11_ACTION_CAT_OFF];
1679         action = action_frame->data[DOT11_ACTION_ACT_OFF];
1680
1681         /* initialize variables */
1682         p2p->next_af_subtype = P2P_PAF_SUBTYPE_INVALID;
1683         p2p->gon_req_action = false;
1684
1685         /* config parameters */
1686         config_af_params.mpc_onoff = -1;
1687         config_af_params.search_channel = false;
1688         config_af_params.extra_listen = false;
1689
1690         if (brcmf_p2p_is_pub_action(action_frame->data, action_frame_len)) {
1691                 /* p2p public action frame process */
1692                 if (brcmf_p2p_pub_af_tx(cfg, af_params, &config_af_params)) {
1693                         /* Just send unknown subtype frame with */
1694                         /* default parameters.                  */
1695                         brcmf_err("P2P Public action frame, unknown subtype.\n");
1696                 }
1697         } else if (brcmf_p2p_is_gas_action(action_frame->data,
1698                                            action_frame_len)) {
1699                 /* service discovery process */
1700                 if (action == P2PSD_ACTION_ID_GAS_IREQ ||
1701                     action == P2PSD_ACTION_ID_GAS_CREQ) {
1702                         /* configure service discovery query frame */
1703                         config_af_params.search_channel = true;
1704
1705                         /* save next af suptype to cancel */
1706                         /* remaining dwell time           */
1707                         p2p->next_af_subtype = action + 1;
1708
1709                         af_params->dwell_time =
1710                                 cpu_to_le32(P2P_AF_MED_DWELL_TIME);
1711                 } else if (action == P2PSD_ACTION_ID_GAS_IRESP ||
1712                            action == P2PSD_ACTION_ID_GAS_CRESP) {
1713                         /* configure service discovery response frame */
1714                         af_params->dwell_time =
1715                                 cpu_to_le32(P2P_AF_MIN_DWELL_TIME);
1716                 } else {
1717                         brcmf_err("Unknown action type: %d\n", action);
1718                         goto exit;
1719                 }
1720         } else if (brcmf_p2p_is_p2p_action(action_frame->data,
1721                                            action_frame_len)) {
1722                 /* do not configure anything. it will be */
1723                 /* sent with a default configuration     */
1724         } else {
1725                 brcmf_err("Unknown Frame: category 0x%x, action 0x%x\n",
1726                           category, action);
1727                 return false;
1728         }
1729
1730         /* if connecting on primary iface, sleep for a while before sending
1731          * af tx for VSDB
1732          */
1733         if (test_bit(BRCMF_VIF_STATUS_CONNECTING,
1734                      &p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->sme_state))
1735                 msleep(50);
1736
1737         /* if scan is ongoing, abort current scan. */
1738         if (test_bit(BRCMF_SCAN_STATUS_BUSY, &cfg->scan_status))
1739                 brcmf_abort_scanning(cfg);
1740
1741         memcpy(afx_hdl->tx_dst_addr, action_frame->da, ETH_ALEN);
1742
1743         /* To make sure to send successfully action frame, turn off mpc */
1744         if (config_af_params.mpc_onoff == 0)
1745                 brcmf_set_mpc(ifp, 0);
1746
1747         /* set status and destination address before sending af */
1748         if (p2p->next_af_subtype != P2P_PAF_SUBTYPE_INVALID) {
1749                 /* set status to cancel the remained dwell time in rx process */
1750                 set_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status);
1751         }
1752
1753         p2p->af_sent_channel = 0;
1754         set_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status);
1755         /* validate channel and p2p ies */
1756         if (config_af_params.search_channel &&
1757             IS_P2P_SOCIAL_CHANNEL(le32_to_cpu(af_params->channel)) &&
1758             p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif->saved_ie.probe_req_ie_len) {
1759                 afx_hdl = &p2p->afx_hdl;
1760                 afx_hdl->peer_listen_chan = le32_to_cpu(af_params->channel);
1761
1762                 if (brcmf_p2p_af_searching_channel(p2p) ==
1763                                                         P2P_INVALID_CHANNEL) {
1764                         brcmf_err("Couldn't find peer's channel.\n");
1765                         goto exit;
1766                 }
1767
1768                 /* Abort scan even for VSDB scenarios. Scan gets aborted in
1769                  * firmware but after the check of piggyback algorithm. To take
1770                  * care of current piggback algo, lets abort the scan here
1771                  * itself.
1772                  */
1773                 brcmf_notify_escan_complete(cfg, ifp, true, true);
1774
1775                 /* update channel */
1776                 af_params->channel = cpu_to_le32(afx_hdl->peer_chan);
1777         }
1778
1779         tx_retry = 0;
1780         while (!p2p->block_gon_req_tx &&
1781                (ack == false) && (tx_retry < P2P_AF_TX_MAX_RETRY)) {
1782                 ack = !brcmf_p2p_tx_action_frame(p2p, af_params);
1783                 tx_retry++;
1784         }
1785         if (ack == false) {
1786                 brcmf_err("Failed to send Action Frame(retry %d)\n", tx_retry);
1787                 clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status);
1788         }
1789
1790 exit:
1791         clear_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status);
1792
1793         /* WAR: sometimes dongle does not keep the dwell time of 'actframe'.
1794          * if we coundn't get the next action response frame and dongle does
1795          * not keep the dwell time, go to listen state again to get next action
1796          * response frame.
1797          */
1798         if (ack && config_af_params.extra_listen && !p2p->block_gon_req_tx &&
1799             test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status) &&
1800             p2p->af_sent_channel == afx_hdl->my_listen_chan) {
1801                 delta_ms = jiffies_to_msecs(jiffies - p2p->af_tx_sent_jiffies);
1802                 if (le32_to_cpu(af_params->dwell_time) > delta_ms)
1803                         extra_listen_time = le32_to_cpu(af_params->dwell_time) -
1804                                             delta_ms;
1805                 else
1806                         extra_listen_time = 0;
1807                 if (extra_listen_time > 50) {
1808                         set_bit(BRCMF_P2P_STATUS_WAITING_NEXT_AF_LISTEN,
1809                                 &p2p->status);
1810                         brcmf_dbg(INFO, "Wait more time! actual af time:%d, calculated extra listen:%d\n",
1811                                   le32_to_cpu(af_params->dwell_time),
1812                                   extra_listen_time);
1813                         extra_listen_time += 100;
1814                         if (!brcmf_p2p_discover_listen(p2p,
1815                                                        p2p->af_sent_channel,
1816                                                        extra_listen_time)) {
1817                                 unsigned long duration;
1818
1819                                 extra_listen_time += 100;
1820                                 duration = msecs_to_jiffies(extra_listen_time);
1821                                 wait_for_completion_timeout(&p2p->wait_next_af,
1822                                                             duration);
1823                         }
1824                         clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_AF_LISTEN,
1825                                   &p2p->status);
1826                 }
1827         }
1828
1829         if (p2p->block_gon_req_tx) {
1830                 /* if ack is true, supplicant will wait more time(100ms).
1831                  * so we will return it as a success to get more time .
1832                  */
1833                 p2p->block_gon_req_tx = false;
1834                 ack = true;
1835         }
1836
1837         clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status);
1838         /* if all done, turn mpc on again */
1839         if (config_af_params.mpc_onoff == 1)
1840                 brcmf_set_mpc(ifp, 1);
1841
1842         return ack;
1843 }
1844
1845 /**
1846  * brcmf_p2p_notify_rx_mgmt_p2p_probereq() - Event handler for p2p probe req.
1847  *
1848  * @ifp: interface pointer for which event was received.
1849  * @e: even message.
1850  * @data: payload of event message (probe request).
1851  */
1852 s32 brcmf_p2p_notify_rx_mgmt_p2p_probereq(struct brcmf_if *ifp,
1853                                           const struct brcmf_event_msg *e,
1854                                           void *data)
1855 {
1856         struct brcmf_cfg80211_info *cfg = ifp->drvr->config;
1857         struct brcmf_p2p_info *p2p = &cfg->p2p;
1858         struct afx_hdl *afx_hdl = &p2p->afx_hdl;
1859         struct brcmf_cfg80211_vif *vif = ifp->vif;
1860         struct brcmf_rx_mgmt_data *rxframe = (struct brcmf_rx_mgmt_data *)data;
1861         struct brcmu_chan ch;
1862         u8 *mgmt_frame;
1863         u32 mgmt_frame_len;
1864         s32 freq;
1865         u16 mgmt_type;
1866
1867         brcmf_dbg(INFO, "Enter: event %d reason %d\n", e->event_code,
1868                   e->reason);
1869
1870         if (e->datalen < sizeof(*rxframe)) {
1871                 brcmf_dbg(SCAN, "Event data to small. Ignore\n");
1872                 return 0;
1873         }
1874
1875         ch.chspec = be16_to_cpu(rxframe->chanspec);
1876         cfg->d11inf.decchspec(&ch);
1877
1878         if (test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status) &&
1879             (ether_addr_equal(afx_hdl->tx_dst_addr, e->addr))) {
1880                 afx_hdl->peer_chan = ch.control_ch_num;
1881                 brcmf_dbg(INFO, "PROBE REQUEST: Peer found, channel=%d\n",
1882                           afx_hdl->peer_chan);
1883                 complete(&afx_hdl->act_frm_scan);
1884         }
1885
1886         /* Firmware sends us two proberesponses for each idx one. At the */
1887         /* moment anything but bsscfgidx 0 is passed up to supplicant    */
1888         if (e->bsscfgidx == 0)
1889                 return 0;
1890
1891         /* Filter any P2P probe reqs arriving during the GO-NEG Phase */
1892         if (test_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status)) {
1893                 brcmf_dbg(INFO, "Filtering P2P probe_req in GO-NEG phase\n");
1894                 return 0;
1895         }
1896
1897         /* Check if wpa_supplicant has registered for this frame */
1898         brcmf_dbg(INFO, "vif->mgmt_rx_reg %04x\n", vif->mgmt_rx_reg);
1899         mgmt_type = (IEEE80211_STYPE_PROBE_REQ & IEEE80211_FCTL_STYPE) >> 4;
1900         if ((vif->mgmt_rx_reg & BIT(mgmt_type)) == 0)
1901                 return 0;
1902
1903         mgmt_frame = (u8 *)(rxframe + 1);
1904         mgmt_frame_len = e->datalen - sizeof(*rxframe);
1905         freq = ieee80211_channel_to_frequency(ch.control_ch_num,
1906                                               ch.band == BRCMU_CHAN_BAND_2G ?
1907                                               NL80211_BAND_2GHZ :
1908                                               NL80211_BAND_5GHZ);
1909
1910         cfg80211_rx_mgmt(&vif->wdev, freq, 0, mgmt_frame, mgmt_frame_len, 0);
1911
1912         brcmf_dbg(INFO, "mgmt_frame_len (%d) , e->datalen (%d), chanspec (%04x), freq (%d)\n",
1913                   mgmt_frame_len, e->datalen, ch.chspec, freq);
1914
1915         return 0;
1916 }
1917
1918
1919 /**
1920  * brcmf_p2p_get_current_chanspec() - Get current operation channel.
1921  *
1922  * @p2p: P2P specific data.
1923  * @chanspec: chanspec to be returned.
1924  */
1925 static void brcmf_p2p_get_current_chanspec(struct brcmf_p2p_info *p2p,
1926                                            u16 *chanspec)
1927 {
1928         struct brcmf_if *ifp;
1929         u8 mac_addr[ETH_ALEN];
1930         struct brcmu_chan ch;
1931         struct brcmf_bss_info_le *bi;
1932         u8 *buf;
1933
1934         ifp = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->ifp;
1935
1936         if (brcmf_fil_cmd_data_get(ifp, BRCMF_C_GET_BSSID, mac_addr,
1937                                    ETH_ALEN) == 0) {
1938                 buf = kzalloc(WL_BSS_INFO_MAX, GFP_KERNEL);
1939                 if (buf != NULL) {
1940                         *(__le32 *)buf = cpu_to_le32(WL_BSS_INFO_MAX);
1941                         if (brcmf_fil_cmd_data_get(ifp, BRCMF_C_GET_BSS_INFO,
1942                                                    buf, WL_BSS_INFO_MAX) == 0) {
1943                                 bi = (struct brcmf_bss_info_le *)(buf + 4);
1944                                 *chanspec = le16_to_cpu(bi->chanspec);
1945                                 kfree(buf);
1946                                 return;
1947                         }
1948                         kfree(buf);
1949                 }
1950         }
1951         /* Use default channel for P2P */
1952         ch.chnum = BRCMF_P2P_TEMP_CHAN;
1953         ch.bw = BRCMU_CHAN_BW_20;
1954         p2p->cfg->d11inf.encchspec(&ch);
1955         *chanspec = ch.chspec;
1956 }
1957
1958 /**
1959  * Change a P2P Role.
1960  * Parameters:
1961  * @mac: MAC address of the BSS to change a role
1962  * Returns 0 if success.
1963  */
1964 int brcmf_p2p_ifchange(struct brcmf_cfg80211_info *cfg,
1965                        enum brcmf_fil_p2p_if_types if_type)
1966 {
1967         struct brcmf_p2p_info *p2p = &cfg->p2p;
1968         struct brcmf_cfg80211_vif *vif;
1969         struct brcmf_fil_p2p_if_le if_request;
1970         s32 err;
1971         u16 chanspec;
1972
1973         brcmf_dbg(TRACE, "Enter\n");
1974
1975         vif = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif;
1976         if (!vif) {
1977                 brcmf_err("vif for P2PAPI_BSSCFG_PRIMARY does not exist\n");
1978                 return -EPERM;
1979         }
1980         brcmf_notify_escan_complete(cfg, vif->ifp, true, true);
1981         vif = p2p->bss_idx[P2PAPI_BSSCFG_CONNECTION].vif;
1982         if (!vif) {
1983                 brcmf_err("vif for P2PAPI_BSSCFG_CONNECTION does not exist\n");
1984                 return -EPERM;
1985         }
1986         brcmf_set_mpc(vif->ifp, 0);
1987
1988         /* In concurrency case, STA may be already associated in a particular */
1989         /* channel. so retrieve the current channel of primary interface and  */
1990         /* then start the virtual interface on that.                          */
1991         brcmf_p2p_get_current_chanspec(p2p, &chanspec);
1992
1993         if_request.type = cpu_to_le16((u16)if_type);
1994         if_request.chspec = cpu_to_le16(chanspec);
1995         memcpy(if_request.addr, p2p->int_addr, sizeof(if_request.addr));
1996
1997         brcmf_cfg80211_arm_vif_event(cfg, vif);
1998         err = brcmf_fil_iovar_data_set(vif->ifp, "p2p_ifupd", &if_request,
1999                                        sizeof(if_request));
2000         if (err) {
2001                 brcmf_err("p2p_ifupd FAILED, err=%d\n", err);
2002                 brcmf_cfg80211_arm_vif_event(cfg, NULL);
2003                 return err;
2004         }
2005         err = brcmf_cfg80211_wait_vif_event(cfg, BRCMF_E_IF_CHANGE,
2006                                             BRCMF_VIF_EVENT_TIMEOUT);
2007         brcmf_cfg80211_arm_vif_event(cfg, NULL);
2008         if (!err)  {
2009                 brcmf_err("No BRCMF_E_IF_CHANGE event received\n");
2010                 return -EIO;
2011         }
2012
2013         err = brcmf_fil_cmd_int_set(vif->ifp, BRCMF_C_SET_SCB_TIMEOUT,
2014                                     BRCMF_SCB_TIMEOUT_VALUE);
2015
2016         return err;
2017 }
2018
2019 static int brcmf_p2p_request_p2p_if(struct brcmf_p2p_info *p2p,
2020                                     struct brcmf_if *ifp, u8 ea[ETH_ALEN],
2021                                     enum brcmf_fil_p2p_if_types iftype)
2022 {
2023         struct brcmf_fil_p2p_if_le if_request;
2024         int err;
2025         u16 chanspec;
2026
2027         /* we need a default channel */
2028         brcmf_p2p_get_current_chanspec(p2p, &chanspec);
2029
2030         /* fill the firmware request */
2031         memcpy(if_request.addr, ea, ETH_ALEN);
2032         if_request.type = cpu_to_le16((u16)iftype);
2033         if_request.chspec = cpu_to_le16(chanspec);
2034
2035         err = brcmf_fil_iovar_data_set(ifp, "p2p_ifadd", &if_request,
2036                                        sizeof(if_request));
2037
2038         return err;
2039 }
2040
2041 static int brcmf_p2p_disable_p2p_if(struct brcmf_cfg80211_vif *vif)
2042 {
2043         struct brcmf_cfg80211_info *cfg = wdev_to_cfg(&vif->wdev);
2044         struct net_device *pri_ndev = cfg_to_ndev(cfg);
2045         struct brcmf_if *ifp = netdev_priv(pri_ndev);
2046         u8 *addr = vif->wdev.netdev->dev_addr;
2047
2048         return brcmf_fil_iovar_data_set(ifp, "p2p_ifdis", addr, ETH_ALEN);
2049 }
2050
2051 static int brcmf_p2p_release_p2p_if(struct brcmf_cfg80211_vif *vif)
2052 {
2053         struct brcmf_cfg80211_info *cfg = wdev_to_cfg(&vif->wdev);
2054         struct net_device *pri_ndev = cfg_to_ndev(cfg);
2055         struct brcmf_if *ifp = netdev_priv(pri_ndev);
2056         u8 *addr = vif->wdev.netdev->dev_addr;
2057
2058         return brcmf_fil_iovar_data_set(ifp, "p2p_ifdel", addr, ETH_ALEN);
2059 }
2060
2061 /**
2062  * brcmf_p2p_create_p2pdev() - create a P2P_DEVICE virtual interface.
2063  *
2064  * @p2p: P2P specific data.
2065  * @wiphy: wiphy device of new interface.
2066  * @addr: mac address for this new interface.
2067  */
2068 static struct wireless_dev *brcmf_p2p_create_p2pdev(struct brcmf_p2p_info *p2p,
2069                                                     struct wiphy *wiphy,
2070                                                     u8 *addr)
2071 {
2072         struct brcmf_cfg80211_vif *p2p_vif;
2073         struct brcmf_if *p2p_ifp;
2074         struct brcmf_if *pri_ifp;
2075         int err;
2076         u32 bsscfgidx;
2077
2078         if (p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif)
2079                 return ERR_PTR(-ENOSPC);
2080
2081         p2p_vif = brcmf_alloc_vif(p2p->cfg, NL80211_IFTYPE_P2P_DEVICE);
2082         if (IS_ERR(p2p_vif)) {
2083                 brcmf_err("could not create discovery vif\n");
2084                 return (struct wireless_dev *)p2p_vif;
2085         }
2086
2087         pri_ifp = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->ifp;
2088
2089         /* firmware requires unique mac address for p2pdev interface */
2090         if (addr && ether_addr_equal(addr, pri_ifp->mac_addr)) {
2091                 brcmf_err("discovery vif must be different from primary interface\n");
2092                 return ERR_PTR(-EINVAL);
2093         }
2094
2095         brcmf_p2p_generate_bss_mac(p2p, addr);
2096         brcmf_p2p_set_firmware(pri_ifp, p2p->dev_addr);
2097
2098         brcmf_cfg80211_arm_vif_event(p2p->cfg, p2p_vif);
2099         brcmf_fweh_p2pdev_setup(pri_ifp, true);
2100
2101         /* Initialize P2P Discovery in the firmware */
2102         err = brcmf_fil_iovar_int_set(pri_ifp, "p2p_disc", 1);
2103         if (err < 0) {
2104                 brcmf_err("set p2p_disc error\n");
2105                 brcmf_fweh_p2pdev_setup(pri_ifp, false);
2106                 brcmf_cfg80211_arm_vif_event(p2p->cfg, NULL);
2107                 goto fail;
2108         }
2109
2110         /* wait for firmware event */
2111         err = brcmf_cfg80211_wait_vif_event(p2p->cfg, BRCMF_E_IF_ADD,
2112                                             BRCMF_VIF_EVENT_TIMEOUT);
2113         brcmf_cfg80211_arm_vif_event(p2p->cfg, NULL);
2114         brcmf_fweh_p2pdev_setup(pri_ifp, false);
2115         if (!err) {
2116                 brcmf_err("timeout occurred\n");
2117                 err = -EIO;
2118                 goto fail;
2119         }
2120
2121         /* discovery interface created */
2122         p2p_ifp = p2p_vif->ifp;
2123         p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif = p2p_vif;
2124         memcpy(p2p_ifp->mac_addr, p2p->dev_addr, ETH_ALEN);
2125         memcpy(&p2p_vif->wdev.address, p2p->dev_addr, sizeof(p2p->dev_addr));
2126
2127         /* verify bsscfg index for P2P discovery */
2128         err = brcmf_fil_iovar_int_get(pri_ifp, "p2p_dev", &bsscfgidx);
2129         if (err < 0) {
2130                 brcmf_err("retrieving discover bsscfg index failed\n");
2131                 goto fail;
2132         }
2133
2134         WARN_ON(p2p_ifp->bsscfgidx != bsscfgidx);
2135
2136         init_completion(&p2p->send_af_done);
2137         INIT_WORK(&p2p->afx_hdl.afx_work, brcmf_p2p_afx_handler);
2138         init_completion(&p2p->afx_hdl.act_frm_scan);
2139         init_completion(&p2p->wait_next_af);
2140
2141         return &p2p_vif->wdev;
2142
2143 fail:
2144         brcmf_free_vif(p2p_vif);
2145         return ERR_PTR(err);
2146 }
2147
2148 /**
2149  * brcmf_p2p_add_vif() - create a new P2P virtual interface.
2150  *
2151  * @wiphy: wiphy device of new interface.
2152  * @name: name of the new interface.
2153  * @name_assign_type: origin of the interface name
2154  * @type: nl80211 interface type.
2155  * @params: contains mac address for P2P device.
2156  */
2157 struct wireless_dev *brcmf_p2p_add_vif(struct wiphy *wiphy, const char *name,
2158                                        unsigned char name_assign_type,
2159                                        enum nl80211_iftype type,
2160                                        struct vif_params *params)
2161 {
2162         struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
2163         struct brcmf_if *ifp = netdev_priv(cfg_to_ndev(cfg));
2164         struct brcmf_cfg80211_vif *vif;
2165         enum brcmf_fil_p2p_if_types iftype;
2166         int err;
2167
2168         if (brcmf_cfg80211_vif_event_armed(cfg))
2169                 return ERR_PTR(-EBUSY);
2170
2171         brcmf_dbg(INFO, "adding vif \"%s\" (type=%d)\n", name, type);
2172
2173         switch (type) {
2174         case NL80211_IFTYPE_P2P_CLIENT:
2175                 iftype = BRCMF_FIL_P2P_IF_CLIENT;
2176                 break;
2177         case NL80211_IFTYPE_P2P_GO:
2178                 iftype = BRCMF_FIL_P2P_IF_GO;
2179                 break;
2180         case NL80211_IFTYPE_P2P_DEVICE:
2181                 return brcmf_p2p_create_p2pdev(&cfg->p2p, wiphy,
2182                                                params->macaddr);
2183         default:
2184                 return ERR_PTR(-EOPNOTSUPP);
2185         }
2186
2187         vif = brcmf_alloc_vif(cfg, type);
2188         if (IS_ERR(vif))
2189                 return (struct wireless_dev *)vif;
2190         brcmf_cfg80211_arm_vif_event(cfg, vif);
2191
2192         err = brcmf_p2p_request_p2p_if(&cfg->p2p, ifp, cfg->p2p.int_addr,
2193                                        iftype);
2194         if (err) {
2195                 brcmf_cfg80211_arm_vif_event(cfg, NULL);
2196                 goto fail;
2197         }
2198
2199         /* wait for firmware event */
2200         err = brcmf_cfg80211_wait_vif_event(cfg, BRCMF_E_IF_ADD,
2201                                             BRCMF_VIF_EVENT_TIMEOUT);
2202         brcmf_cfg80211_arm_vif_event(cfg, NULL);
2203         if (!err) {
2204                 brcmf_err("timeout occurred\n");
2205                 err = -EIO;
2206                 goto fail;
2207         }
2208
2209         /* interface created in firmware */
2210         ifp = vif->ifp;
2211         if (!ifp) {
2212                 brcmf_err("no if pointer provided\n");
2213                 err = -ENOENT;
2214                 goto fail;
2215         }
2216
2217         strncpy(ifp->ndev->name, name, sizeof(ifp->ndev->name) - 1);
2218         ifp->ndev->name_assign_type = name_assign_type;
2219         err = brcmf_net_attach(ifp, true);
2220         if (err) {
2221                 brcmf_err("Registering netdevice failed\n");
2222                 free_netdev(ifp->ndev);
2223                 goto fail;
2224         }
2225
2226         cfg->p2p.bss_idx[P2PAPI_BSSCFG_CONNECTION].vif = vif;
2227         /* Disable firmware roaming for P2P interface  */
2228         brcmf_fil_iovar_int_set(ifp, "roam_off", 1);
2229         if (iftype == BRCMF_FIL_P2P_IF_GO) {
2230                 /* set station timeout for p2p */
2231                 brcmf_fil_cmd_int_set(ifp, BRCMF_C_SET_SCB_TIMEOUT,
2232                                       BRCMF_SCB_TIMEOUT_VALUE);
2233         }
2234         return &ifp->vif->wdev;
2235
2236 fail:
2237         brcmf_free_vif(vif);
2238         return ERR_PTR(err);
2239 }
2240
2241 /**
2242  * brcmf_p2p_del_vif() - delete a P2P virtual interface.
2243  *
2244  * @wiphy: wiphy device of interface.
2245  * @wdev: wireless device of interface.
2246  */
2247 int brcmf_p2p_del_vif(struct wiphy *wiphy, struct wireless_dev *wdev)
2248 {
2249         struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
2250         struct brcmf_p2p_info *p2p = &cfg->p2p;
2251         struct brcmf_cfg80211_vif *vif;
2252         enum nl80211_iftype iftype;
2253         bool wait_for_disable = false;
2254         int err;
2255
2256         brcmf_dbg(TRACE, "delete P2P vif\n");
2257         vif = container_of(wdev, struct brcmf_cfg80211_vif, wdev);
2258
2259         iftype = vif->wdev.iftype;
2260         brcmf_cfg80211_arm_vif_event(cfg, vif);
2261         switch (iftype) {
2262         case NL80211_IFTYPE_P2P_CLIENT:
2263                 if (test_bit(BRCMF_VIF_STATUS_DISCONNECTING, &vif->sme_state))
2264                         wait_for_disable = true;
2265                 break;
2266
2267         case NL80211_IFTYPE_P2P_GO:
2268                 if (!brcmf_p2p_disable_p2p_if(vif))
2269                         wait_for_disable = true;
2270                 break;
2271
2272         case NL80211_IFTYPE_P2P_DEVICE:
2273                 if (!p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif)
2274                         return 0;
2275                 brcmf_p2p_cancel_remain_on_channel(vif->ifp);
2276                 brcmf_p2p_deinit_discovery(p2p);
2277                 break;
2278
2279         default:
2280                 return -ENOTSUPP;
2281         }
2282
2283         clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status);
2284         brcmf_dbg(INFO, "P2P: GO_NEG_PHASE status cleared\n");
2285
2286         if (wait_for_disable)
2287                 wait_for_completion_timeout(&cfg->vif_disabled,
2288                                             BRCMF_P2P_DISABLE_TIMEOUT);
2289
2290         err = 0;
2291         if (iftype != NL80211_IFTYPE_P2P_DEVICE) {
2292                 brcmf_vif_clear_mgmt_ies(vif);
2293                 err = brcmf_p2p_release_p2p_if(vif);
2294         }
2295         if (!err) {
2296                 /* wait for firmware event */
2297                 err = brcmf_cfg80211_wait_vif_event(cfg, BRCMF_E_IF_DEL,
2298                                                     BRCMF_VIF_EVENT_TIMEOUT);
2299                 if (!err)
2300                         err = -EIO;
2301                 else
2302                         err = 0;
2303         }
2304         brcmf_remove_interface(vif->ifp, true);
2305
2306         brcmf_cfg80211_arm_vif_event(cfg, NULL);
2307         if (iftype != NL80211_IFTYPE_P2P_DEVICE)
2308                 p2p->bss_idx[P2PAPI_BSSCFG_CONNECTION].vif = NULL;
2309
2310         return err;
2311 }
2312
2313 void brcmf_p2p_ifp_removed(struct brcmf_if *ifp, bool rtnl_locked)
2314 {
2315         struct brcmf_cfg80211_info *cfg;
2316         struct brcmf_cfg80211_vif *vif;
2317
2318         brcmf_dbg(INFO, "P2P: device interface removed\n");
2319         vif = ifp->vif;
2320         cfg = wdev_to_cfg(&vif->wdev);
2321         cfg->p2p.bss_idx[P2PAPI_BSSCFG_DEVICE].vif = NULL;
2322         if (!rtnl_locked)
2323                 rtnl_lock();
2324         cfg80211_unregister_wdev(&vif->wdev);
2325         if (!rtnl_locked)
2326                 rtnl_unlock();
2327         brcmf_free_vif(vif);
2328 }
2329
2330 int brcmf_p2p_start_device(struct wiphy *wiphy, struct wireless_dev *wdev)
2331 {
2332         struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
2333         struct brcmf_p2p_info *p2p = &cfg->p2p;
2334         struct brcmf_cfg80211_vif *vif;
2335         int err;
2336
2337         vif = container_of(wdev, struct brcmf_cfg80211_vif, wdev);
2338         mutex_lock(&cfg->usr_sync);
2339         err = brcmf_p2p_enable_discovery(p2p);
2340         if (!err)
2341                 set_bit(BRCMF_VIF_STATUS_READY, &vif->sme_state);
2342         mutex_unlock(&cfg->usr_sync);
2343         return err;
2344 }
2345
2346 void brcmf_p2p_stop_device(struct wiphy *wiphy, struct wireless_dev *wdev)
2347 {
2348         struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
2349         struct brcmf_p2p_info *p2p = &cfg->p2p;
2350         struct brcmf_cfg80211_vif *vif;
2351
2352         vif = container_of(wdev, struct brcmf_cfg80211_vif, wdev);
2353         /* This call can be result of the unregister_wdev call. In that case
2354          * we dont want to do anything anymore. Just return. The config vif
2355          * will have been cleared at this point.
2356          */
2357         if (p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif == vif) {
2358                 mutex_lock(&cfg->usr_sync);
2359                 /* Set the discovery state to SCAN */
2360                 (void)brcmf_p2p_set_discover_state(vif->ifp,
2361                                                    WL_P2P_DISC_ST_SCAN, 0, 0);
2362                 brcmf_abort_scanning(cfg);
2363                 clear_bit(BRCMF_VIF_STATUS_READY, &vif->sme_state);
2364                 mutex_unlock(&cfg->usr_sync);
2365         }
2366 }
2367
2368 /**
2369  * brcmf_p2p_attach() - attach for P2P.
2370  *
2371  * @cfg: driver private data for cfg80211 interface.
2372  * @p2pdev_forced: create p2p device interface at attach.
2373  */
2374 s32 brcmf_p2p_attach(struct brcmf_cfg80211_info *cfg, bool p2pdev_forced)
2375 {
2376         struct brcmf_p2p_info *p2p;
2377         struct brcmf_if *pri_ifp;
2378         s32 err = 0;
2379         void *err_ptr;
2380
2381         p2p = &cfg->p2p;
2382         p2p->cfg = cfg;
2383
2384         pri_ifp = brcmf_get_ifp(cfg->pub, 0);
2385         p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif = pri_ifp->vif;
2386
2387         if (p2pdev_forced) {
2388                 err_ptr = brcmf_p2p_create_p2pdev(p2p, NULL, NULL);
2389                 if (IS_ERR(err_ptr)) {
2390                         brcmf_err("P2P device creation failed.\n");
2391                         err = PTR_ERR(err_ptr);
2392                 }
2393         } else {
2394                 p2p->p2pdev_dynamically = true;
2395         }
2396         return err;
2397 }
2398
2399 /**
2400  * brcmf_p2p_detach() - detach P2P.
2401  *
2402  * @p2p: P2P specific data.
2403  */
2404 void brcmf_p2p_detach(struct brcmf_p2p_info *p2p)
2405 {
2406         struct brcmf_cfg80211_vif *vif;
2407
2408         vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif;
2409         if (vif != NULL) {
2410                 brcmf_p2p_cancel_remain_on_channel(vif->ifp);
2411                 brcmf_p2p_deinit_discovery(p2p);
2412                 brcmf_remove_interface(vif->ifp, false);
2413         }
2414         /* just set it all to zero */
2415         memset(p2p, 0, sizeof(*p2p));
2416 }
2417