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(1500)
  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         unsigned long duration;
1138         s32 retry;
1139
1140         brcmf_dbg(TRACE, "Enter\n");
1141
1142         pri_vif = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif;
1143
1144         reinit_completion(&afx_hdl->act_frm_scan);
1145         set_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status);
1146         afx_hdl->is_active = true;
1147         afx_hdl->peer_chan = P2P_INVALID_CHANNEL;
1148
1149         /* Loop to wait until we find a peer's channel or the
1150          * pending action frame tx is cancelled.
1151          */
1152         retry = 0;
1153         duration = msecs_to_jiffies(P2P_AF_FRM_SCAN_MAX_WAIT);
1154         while ((retry < P2P_CHANNEL_SYNC_RETRY) &&
1155                (afx_hdl->peer_chan == P2P_INVALID_CHANNEL)) {
1156                 afx_hdl->is_listen = false;
1157                 brcmf_dbg(TRACE, "Scheduling action frame for sending.. (%d)\n",
1158                           retry);
1159                 /* search peer on peer's listen channel */
1160                 schedule_work(&afx_hdl->afx_work);
1161                 wait_for_completion_timeout(&afx_hdl->act_frm_scan, duration);
1162                 if ((afx_hdl->peer_chan != P2P_INVALID_CHANNEL) ||
1163                     (!test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL,
1164                                &p2p->status)))
1165                         break;
1166
1167                 if (afx_hdl->my_listen_chan) {
1168                         brcmf_dbg(TRACE, "Scheduling listen peer, channel=%d\n",
1169                                   afx_hdl->my_listen_chan);
1170                         /* listen on my listen channel */
1171                         afx_hdl->is_listen = true;
1172                         schedule_work(&afx_hdl->afx_work);
1173                         wait_for_completion_timeout(&afx_hdl->act_frm_scan,
1174                                                     duration);
1175                 }
1176                 if ((afx_hdl->peer_chan != P2P_INVALID_CHANNEL) ||
1177                     (!test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL,
1178                                &p2p->status)))
1179                         break;
1180                 retry++;
1181
1182                 /* if sta is connected or connecting, sleep for a while before
1183                  * retry af tx or finding a peer
1184                  */
1185                 if (test_bit(BRCMF_VIF_STATUS_CONNECTED, &pri_vif->sme_state) ||
1186                     test_bit(BRCMF_VIF_STATUS_CONNECTING, &pri_vif->sme_state))
1187                         msleep(P2P_DEFAULT_SLEEP_TIME_VSDB);
1188         }
1189
1190         brcmf_dbg(TRACE, "Completed search/listen peer_chan=%d\n",
1191                   afx_hdl->peer_chan);
1192         afx_hdl->is_active = false;
1193
1194         clear_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status);
1195
1196         return afx_hdl->peer_chan;
1197 }
1198
1199
1200 /**
1201  * brcmf_p2p_scan_finding_common_channel() - was escan used for finding channel
1202  *
1203  * @cfg: common configuration struct.
1204  * @bi: bss info struct, result from scan.
1205  *
1206  */
1207 bool brcmf_p2p_scan_finding_common_channel(struct brcmf_cfg80211_info *cfg,
1208                                            struct brcmf_bss_info_le *bi)
1209
1210 {
1211         struct brcmf_p2p_info *p2p = &cfg->p2p;
1212         struct afx_hdl *afx_hdl = &p2p->afx_hdl;
1213         struct brcmu_chan ch;
1214         u8 *ie;
1215         s32 err;
1216         u8 p2p_dev_addr[ETH_ALEN];
1217
1218         if (!test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status))
1219                 return false;
1220
1221         if (bi == NULL) {
1222                 brcmf_dbg(TRACE, "ACTION FRAME SCAN Done\n");
1223                 if (afx_hdl->peer_chan == P2P_INVALID_CHANNEL)
1224                         complete(&afx_hdl->act_frm_scan);
1225                 return true;
1226         }
1227
1228         ie = ((u8 *)bi) + le16_to_cpu(bi->ie_offset);
1229         memset(p2p_dev_addr, 0, sizeof(p2p_dev_addr));
1230         err = cfg80211_get_p2p_attr(ie, le32_to_cpu(bi->ie_length),
1231                                     IEEE80211_P2P_ATTR_DEVICE_INFO,
1232                                     p2p_dev_addr, sizeof(p2p_dev_addr));
1233         if (err < 0)
1234                 err = cfg80211_get_p2p_attr(ie, le32_to_cpu(bi->ie_length),
1235                                             IEEE80211_P2P_ATTR_DEVICE_ID,
1236                                             p2p_dev_addr, sizeof(p2p_dev_addr));
1237         if ((err >= 0) &&
1238             (ether_addr_equal(p2p_dev_addr, afx_hdl->tx_dst_addr))) {
1239                 if (!bi->ctl_ch) {
1240                         ch.chspec = le16_to_cpu(bi->chanspec);
1241                         cfg->d11inf.decchspec(&ch);
1242                         bi->ctl_ch = ch.control_ch_num;
1243                 }
1244                 afx_hdl->peer_chan = bi->ctl_ch;
1245                 brcmf_dbg(TRACE, "ACTION FRAME SCAN : Peer %pM found, channel : %d\n",
1246                           afx_hdl->tx_dst_addr, afx_hdl->peer_chan);
1247                 complete(&afx_hdl->act_frm_scan);
1248         }
1249         return true;
1250 }
1251
1252 /**
1253  * brcmf_p2p_stop_wait_next_action_frame() - finish scan if af tx complete.
1254  *
1255  * @cfg: common configuration struct.
1256  *
1257  */
1258 static void
1259 brcmf_p2p_stop_wait_next_action_frame(struct brcmf_cfg80211_info *cfg)
1260 {
1261         struct brcmf_p2p_info *p2p = &cfg->p2p;
1262         struct brcmf_if *ifp = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->ifp;
1263
1264         if (test_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status) &&
1265             (test_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status) ||
1266              test_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status))) {
1267                 brcmf_dbg(TRACE, "*** Wake UP ** abort actframe iovar\n");
1268                 /* if channel is not zero, "actfame" uses off channel scan.
1269                  * So abort scan for off channel completion.
1270                  */
1271                 if (p2p->af_sent_channel)
1272                         brcmf_notify_escan_complete(cfg, ifp, true, true);
1273         } else if (test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_AF_LISTEN,
1274                             &p2p->status)) {
1275                 brcmf_dbg(TRACE, "*** Wake UP ** abort listen for next af frame\n");
1276                 /* So abort scan to cancel listen */
1277                 brcmf_notify_escan_complete(cfg, ifp, true, true);
1278         }
1279 }
1280
1281
1282 /**
1283  * brcmf_p2p_gon_req_collision() - Check if go negotiaton collission
1284  *
1285  * @p2p: p2p device info struct.
1286  *
1287  * return true if recevied action frame is to be dropped.
1288  */
1289 static bool
1290 brcmf_p2p_gon_req_collision(struct brcmf_p2p_info *p2p, u8 *mac)
1291 {
1292         struct brcmf_cfg80211_info *cfg = p2p->cfg;
1293         struct brcmf_if *ifp;
1294
1295         brcmf_dbg(TRACE, "Enter\n");
1296
1297         if (!test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status) ||
1298             !p2p->gon_req_action)
1299                 return false;
1300
1301         brcmf_dbg(TRACE, "GO Negotiation Request COLLISION !!!\n");
1302         /* if sa(peer) addr is less than da(my) addr, then this device
1303          * process peer's gon request and block to send gon req.
1304          * if not (sa addr > da addr),
1305          * this device will process gon request and drop gon req of peer.
1306          */
1307         ifp = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif->ifp;
1308         if (memcmp(mac, ifp->mac_addr, ETH_ALEN) < 0) {
1309                 brcmf_dbg(INFO, "Block transmit gon req !!!\n");
1310                 p2p->block_gon_req_tx = true;
1311                 /* if we are finding a common channel for sending af,
1312                  * do not scan more to block to send current gon req
1313                  */
1314                 if (test_and_clear_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL,
1315                                        &p2p->status))
1316                         complete(&p2p->afx_hdl.act_frm_scan);
1317                 if (test_and_clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME,
1318                                        &p2p->status))
1319                         brcmf_p2p_stop_wait_next_action_frame(cfg);
1320                 return false;
1321         }
1322
1323         /* drop gon request of peer to process gon request by this device. */
1324         brcmf_dbg(INFO, "Drop received gon req !!!\n");
1325
1326         return true;
1327 }
1328
1329
1330 /**
1331  * brcmf_p2p_notify_action_frame_rx() - received action frame.
1332  *
1333  * @ifp: interfac control.
1334  * @e: event message. Not used, to make it usable for fweh event dispatcher.
1335  * @data: payload of message, containing action frame data.
1336  *
1337  */
1338 int brcmf_p2p_notify_action_frame_rx(struct brcmf_if *ifp,
1339                                      const struct brcmf_event_msg *e,
1340                                      void *data)
1341 {
1342         struct brcmf_cfg80211_info *cfg = ifp->drvr->config;
1343         struct brcmf_p2p_info *p2p = &cfg->p2p;
1344         struct afx_hdl *afx_hdl = &p2p->afx_hdl;
1345         struct wireless_dev *wdev;
1346         u32 mgmt_frame_len = e->datalen - sizeof(struct brcmf_rx_mgmt_data);
1347         struct brcmf_rx_mgmt_data *rxframe = (struct brcmf_rx_mgmt_data *)data;
1348         u8 *frame = (u8 *)(rxframe + 1);
1349         struct brcmf_p2p_pub_act_frame *act_frm;
1350         struct brcmf_p2psd_gas_pub_act_frame *sd_act_frm;
1351         struct brcmu_chan ch;
1352         struct ieee80211_mgmt *mgmt_frame;
1353         s32 freq;
1354         u16 mgmt_type;
1355         u8 action;
1356
1357         if (e->datalen < sizeof(*rxframe)) {
1358                 brcmf_dbg(SCAN, "Event data to small. Ignore\n");
1359                 return 0;
1360         }
1361
1362         ch.chspec = be16_to_cpu(rxframe->chanspec);
1363         cfg->d11inf.decchspec(&ch);
1364         /* Check if wpa_supplicant has registered for this frame */
1365         brcmf_dbg(INFO, "ifp->vif->mgmt_rx_reg %04x\n", ifp->vif->mgmt_rx_reg);
1366         mgmt_type = (IEEE80211_STYPE_ACTION & IEEE80211_FCTL_STYPE) >> 4;
1367         if ((ifp->vif->mgmt_rx_reg & BIT(mgmt_type)) == 0)
1368                 return 0;
1369
1370         brcmf_p2p_print_actframe(false, frame, mgmt_frame_len);
1371
1372         action = P2P_PAF_SUBTYPE_INVALID;
1373         if (brcmf_p2p_is_pub_action(frame, mgmt_frame_len)) {
1374                 act_frm = (struct brcmf_p2p_pub_act_frame *)frame;
1375                 action = act_frm->subtype;
1376                 if ((action == P2P_PAF_GON_REQ) &&
1377                     (brcmf_p2p_gon_req_collision(p2p, (u8 *)e->addr))) {
1378                         if (test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL,
1379                                      &p2p->status) &&
1380                             (ether_addr_equal(afx_hdl->tx_dst_addr, e->addr))) {
1381                                 afx_hdl->peer_chan = ch.control_ch_num;
1382                                 brcmf_dbg(INFO, "GON request: Peer found, channel=%d\n",
1383                                           afx_hdl->peer_chan);
1384                                 complete(&afx_hdl->act_frm_scan);
1385                         }
1386                         return 0;
1387                 }
1388                 /* After complete GO Negotiation, roll back to mpc mode */
1389                 if ((action == P2P_PAF_GON_CONF) ||
1390                     (action == P2P_PAF_PROVDIS_RSP))
1391                         brcmf_set_mpc(ifp, 1);
1392                 if (action == P2P_PAF_GON_CONF) {
1393                         brcmf_dbg(TRACE, "P2P: GO_NEG_PHASE status cleared\n");
1394                         clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status);
1395                 }
1396         } else if (brcmf_p2p_is_gas_action(frame, mgmt_frame_len)) {
1397                 sd_act_frm = (struct brcmf_p2psd_gas_pub_act_frame *)frame;
1398                 action = sd_act_frm->action;
1399         }
1400
1401         if (test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status) &&
1402             (p2p->next_af_subtype == action)) {
1403                 brcmf_dbg(TRACE, "We got a right next frame! (%d)\n", action);
1404                 clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME,
1405                           &p2p->status);
1406                 /* Stop waiting for next AF. */
1407                 brcmf_p2p_stop_wait_next_action_frame(cfg);
1408         }
1409
1410         mgmt_frame = kzalloc(offsetof(struct ieee80211_mgmt, u) +
1411                              mgmt_frame_len, GFP_KERNEL);
1412         if (!mgmt_frame) {
1413                 brcmf_err("No memory available for action frame\n");
1414                 return -ENOMEM;
1415         }
1416         memcpy(mgmt_frame->da, ifp->mac_addr, ETH_ALEN);
1417         brcmf_fil_cmd_data_get(ifp, BRCMF_C_GET_BSSID, mgmt_frame->bssid,
1418                                ETH_ALEN);
1419         memcpy(mgmt_frame->sa, e->addr, ETH_ALEN);
1420         mgmt_frame->frame_control = cpu_to_le16(IEEE80211_STYPE_ACTION);
1421         memcpy(&mgmt_frame->u, frame, mgmt_frame_len);
1422         mgmt_frame_len += offsetof(struct ieee80211_mgmt, u);
1423
1424         freq = ieee80211_channel_to_frequency(ch.control_ch_num,
1425                                               ch.band == BRCMU_CHAN_BAND_2G ?
1426                                               NL80211_BAND_2GHZ :
1427                                               NL80211_BAND_5GHZ);
1428
1429         wdev = &ifp->vif->wdev;
1430         cfg80211_rx_mgmt(wdev, freq, 0, (u8 *)mgmt_frame, mgmt_frame_len, 0);
1431
1432         kfree(mgmt_frame);
1433         return 0;
1434 }
1435
1436
1437 /**
1438  * brcmf_p2p_notify_action_tx_complete() - transmit action frame complete
1439  *
1440  * @ifp: interfac control.
1441  * @e: event message. Not used, to make it usable for fweh event dispatcher.
1442  * @data: not used.
1443  *
1444  */
1445 int brcmf_p2p_notify_action_tx_complete(struct brcmf_if *ifp,
1446                                         const struct brcmf_event_msg *e,
1447                                         void *data)
1448 {
1449         struct brcmf_cfg80211_info *cfg = ifp->drvr->config;
1450         struct brcmf_p2p_info *p2p = &cfg->p2p;
1451
1452         brcmf_dbg(INFO, "Enter: event %s, status=%d\n",
1453                   e->event_code == BRCMF_E_ACTION_FRAME_OFF_CHAN_COMPLETE ?
1454                   "ACTION_FRAME_OFF_CHAN_COMPLETE" : "ACTION_FRAME_COMPLETE",
1455                   e->status);
1456
1457         if (!test_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status))
1458                 return 0;
1459
1460         if (e->event_code == BRCMF_E_ACTION_FRAME_COMPLETE) {
1461                 if (e->status == BRCMF_E_STATUS_SUCCESS)
1462                         set_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED,
1463                                 &p2p->status);
1464                 else {
1465                         set_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status);
1466                         /* If there is no ack, we don't need to wait for
1467                          * WLC_E_ACTION_FRAME_OFFCHAN_COMPLETE event
1468                          */
1469                         brcmf_p2p_stop_wait_next_action_frame(cfg);
1470                 }
1471
1472         } else {
1473                 complete(&p2p->send_af_done);
1474         }
1475         return 0;
1476 }
1477
1478
1479 /**
1480  * brcmf_p2p_tx_action_frame() - send action frame over fil.
1481  *
1482  * @p2p: p2p info struct for vif.
1483  * @af_params: action frame data/info.
1484  *
1485  * Send an action frame immediately without doing channel synchronization.
1486  *
1487  * This function waits for a completion event before returning.
1488  * The WLC_E_ACTION_FRAME_COMPLETE event will be received when the action
1489  * frame is transmitted.
1490  */
1491 static s32 brcmf_p2p_tx_action_frame(struct brcmf_p2p_info *p2p,
1492                                      struct brcmf_fil_af_params_le *af_params)
1493 {
1494         struct brcmf_cfg80211_vif *vif;
1495         s32 err = 0;
1496         s32 timeout = 0;
1497
1498         brcmf_dbg(TRACE, "Enter\n");
1499
1500         reinit_completion(&p2p->send_af_done);
1501         clear_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status);
1502         clear_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status);
1503
1504         vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif;
1505         err = brcmf_fil_bsscfg_data_set(vif->ifp, "actframe", af_params,
1506                                         sizeof(*af_params));
1507         if (err) {
1508                 brcmf_err(" sending action frame has failed\n");
1509                 goto exit;
1510         }
1511
1512         p2p->af_sent_channel = le32_to_cpu(af_params->channel);
1513         p2p->af_tx_sent_jiffies = jiffies;
1514
1515         timeout = wait_for_completion_timeout(&p2p->send_af_done,
1516                                               P2P_AF_MAX_WAIT_TIME);
1517
1518         if (test_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status)) {
1519                 brcmf_dbg(TRACE, "TX action frame operation is success\n");
1520         } else {
1521                 err = -EIO;
1522                 brcmf_dbg(TRACE, "TX action frame operation has failed\n");
1523         }
1524         /* clear status bit for action tx */
1525         clear_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status);
1526         clear_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status);
1527
1528 exit:
1529         return err;
1530 }
1531
1532
1533 /**
1534  * brcmf_p2p_pub_af_tx() - public action frame tx routine.
1535  *
1536  * @cfg: driver private data for cfg80211 interface.
1537  * @af_params: action frame data/info.
1538  * @config_af_params: configuration data for action frame.
1539  *
1540  * routine which transmits ation frame public type.
1541  */
1542 static s32 brcmf_p2p_pub_af_tx(struct brcmf_cfg80211_info *cfg,
1543                                struct brcmf_fil_af_params_le *af_params,
1544                                struct brcmf_config_af_params *config_af_params)
1545 {
1546         struct brcmf_p2p_info *p2p = &cfg->p2p;
1547         struct brcmf_fil_action_frame_le *action_frame;
1548         struct brcmf_p2p_pub_act_frame *act_frm;
1549         s32 err = 0;
1550         u16 ie_len;
1551
1552         action_frame = &af_params->action_frame;
1553         act_frm = (struct brcmf_p2p_pub_act_frame *)(action_frame->data);
1554
1555         config_af_params->extra_listen = true;
1556
1557         switch (act_frm->subtype) {
1558         case P2P_PAF_GON_REQ:
1559                 brcmf_dbg(TRACE, "P2P: GO_NEG_PHASE status set\n");
1560                 set_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status);
1561                 config_af_params->mpc_onoff = 0;
1562                 config_af_params->search_channel = true;
1563                 p2p->next_af_subtype = act_frm->subtype + 1;
1564                 p2p->gon_req_action = true;
1565                 /* increase dwell time to wait for RESP frame */
1566                 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME);
1567                 break;
1568         case P2P_PAF_GON_RSP:
1569                 p2p->next_af_subtype = act_frm->subtype + 1;
1570                 /* increase dwell time to wait for CONF frame */
1571                 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME);
1572                 break;
1573         case P2P_PAF_GON_CONF:
1574                 /* If we reached till GO Neg confirmation reset the filter */
1575                 brcmf_dbg(TRACE, "P2P: GO_NEG_PHASE status cleared\n");
1576                 clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status);
1577                 /* turn on mpc again if go nego is done */
1578                 config_af_params->mpc_onoff = 1;
1579                 /* minimize dwell time */
1580                 af_params->dwell_time = cpu_to_le32(P2P_AF_MIN_DWELL_TIME);
1581                 config_af_params->extra_listen = false;
1582                 break;
1583         case P2P_PAF_INVITE_REQ:
1584                 config_af_params->search_channel = true;
1585                 p2p->next_af_subtype = act_frm->subtype + 1;
1586                 /* increase dwell time */
1587                 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME);
1588                 break;
1589         case P2P_PAF_INVITE_RSP:
1590                 /* minimize dwell time */
1591                 af_params->dwell_time = cpu_to_le32(P2P_AF_MIN_DWELL_TIME);
1592                 config_af_params->extra_listen = false;
1593                 break;
1594         case P2P_PAF_DEVDIS_REQ:
1595                 config_af_params->search_channel = true;
1596                 p2p->next_af_subtype = act_frm->subtype + 1;
1597                 /* maximize dwell time to wait for RESP frame */
1598                 af_params->dwell_time = cpu_to_le32(P2P_AF_LONG_DWELL_TIME);
1599                 break;
1600         case P2P_PAF_DEVDIS_RSP:
1601                 /* minimize dwell time */
1602                 af_params->dwell_time = cpu_to_le32(P2P_AF_MIN_DWELL_TIME);
1603                 config_af_params->extra_listen = false;
1604                 break;
1605         case P2P_PAF_PROVDIS_REQ:
1606                 ie_len = le16_to_cpu(action_frame->len) -
1607                          offsetof(struct brcmf_p2p_pub_act_frame, elts);
1608                 if (cfg80211_get_p2p_attr(&act_frm->elts[0], ie_len,
1609                                           IEEE80211_P2P_ATTR_GROUP_ID,
1610                                           NULL, 0) < 0)
1611                         config_af_params->search_channel = true;
1612                 config_af_params->mpc_onoff = 0;
1613                 p2p->next_af_subtype = act_frm->subtype + 1;
1614                 /* increase dwell time to wait for RESP frame */
1615                 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME);
1616                 break;
1617         case P2P_PAF_PROVDIS_RSP:
1618                 /* wpa_supplicant send go nego req right after prov disc */
1619                 p2p->next_af_subtype = P2P_PAF_GON_REQ;
1620                 /* increase dwell time to MED level */
1621                 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME);
1622                 config_af_params->extra_listen = false;
1623                 break;
1624         default:
1625                 brcmf_err("Unknown p2p pub act frame subtype: %d\n",
1626                           act_frm->subtype);
1627                 err = -EINVAL;
1628         }
1629         return err;
1630 }
1631
1632 /**
1633  * brcmf_p2p_send_action_frame() - send action frame .
1634  *
1635  * @cfg: driver private data for cfg80211 interface.
1636  * @ndev: net device to transmit on.
1637  * @af_params: configuration data for action frame.
1638  */
1639 bool brcmf_p2p_send_action_frame(struct brcmf_cfg80211_info *cfg,
1640                                  struct net_device *ndev,
1641                                  struct brcmf_fil_af_params_le *af_params)
1642 {
1643         struct brcmf_p2p_info *p2p = &cfg->p2p;
1644         struct brcmf_if *ifp = netdev_priv(ndev);
1645         struct brcmf_fil_action_frame_le *action_frame;
1646         struct brcmf_config_af_params config_af_params;
1647         struct afx_hdl *afx_hdl = &p2p->afx_hdl;
1648         u16 action_frame_len;
1649         bool ack = false;
1650         u8 category;
1651         u8 action;
1652         s32 tx_retry;
1653         s32 extra_listen_time;
1654         uint delta_ms;
1655
1656         action_frame = &af_params->action_frame;
1657         action_frame_len = le16_to_cpu(action_frame->len);
1658
1659         brcmf_p2p_print_actframe(true, action_frame->data, action_frame_len);
1660
1661         /* Add the default dwell time. Dwell time to stay off-channel */
1662         /* to wait for a response action frame after transmitting an  */
1663         /* GO Negotiation action frame                                */
1664         af_params->dwell_time = cpu_to_le32(P2P_AF_DWELL_TIME);
1665
1666         category = action_frame->data[DOT11_ACTION_CAT_OFF];
1667         action = action_frame->data[DOT11_ACTION_ACT_OFF];
1668
1669         /* initialize variables */
1670         p2p->next_af_subtype = P2P_PAF_SUBTYPE_INVALID;
1671         p2p->gon_req_action = false;
1672
1673         /* config parameters */
1674         config_af_params.mpc_onoff = -1;
1675         config_af_params.search_channel = false;
1676         config_af_params.extra_listen = false;
1677
1678         if (brcmf_p2p_is_pub_action(action_frame->data, action_frame_len)) {
1679                 /* p2p public action frame process */
1680                 if (brcmf_p2p_pub_af_tx(cfg, af_params, &config_af_params)) {
1681                         /* Just send unknown subtype frame with */
1682                         /* default parameters.                  */
1683                         brcmf_err("P2P Public action frame, unknown subtype.\n");
1684                 }
1685         } else if (brcmf_p2p_is_gas_action(action_frame->data,
1686                                            action_frame_len)) {
1687                 /* service discovery process */
1688                 if (action == P2PSD_ACTION_ID_GAS_IREQ ||
1689                     action == P2PSD_ACTION_ID_GAS_CREQ) {
1690                         /* configure service discovery query frame */
1691                         config_af_params.search_channel = true;
1692
1693                         /* save next af suptype to cancel */
1694                         /* remaining dwell time           */
1695                         p2p->next_af_subtype = action + 1;
1696
1697                         af_params->dwell_time =
1698                                 cpu_to_le32(P2P_AF_MED_DWELL_TIME);
1699                 } else if (action == P2PSD_ACTION_ID_GAS_IRESP ||
1700                            action == P2PSD_ACTION_ID_GAS_CRESP) {
1701                         /* configure service discovery response frame */
1702                         af_params->dwell_time =
1703                                 cpu_to_le32(P2P_AF_MIN_DWELL_TIME);
1704                 } else {
1705                         brcmf_err("Unknown action type: %d\n", action);
1706                         goto exit;
1707                 }
1708         } else if (brcmf_p2p_is_p2p_action(action_frame->data,
1709                                            action_frame_len)) {
1710                 /* do not configure anything. it will be */
1711                 /* sent with a default configuration     */
1712         } else {
1713                 brcmf_err("Unknown Frame: category 0x%x, action 0x%x\n",
1714                           category, action);
1715                 return false;
1716         }
1717
1718         /* if connecting on primary iface, sleep for a while before sending
1719          * af tx for VSDB
1720          */
1721         if (test_bit(BRCMF_VIF_STATUS_CONNECTING,
1722                      &p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->sme_state))
1723                 msleep(50);
1724
1725         /* if scan is ongoing, abort current scan. */
1726         if (test_bit(BRCMF_SCAN_STATUS_BUSY, &cfg->scan_status))
1727                 brcmf_abort_scanning(cfg);
1728
1729         memcpy(afx_hdl->tx_dst_addr, action_frame->da, ETH_ALEN);
1730
1731         /* To make sure to send successfully action frame, turn off mpc */
1732         if (config_af_params.mpc_onoff == 0)
1733                 brcmf_set_mpc(ifp, 0);
1734
1735         /* set status and destination address before sending af */
1736         if (p2p->next_af_subtype != P2P_PAF_SUBTYPE_INVALID) {
1737                 /* set status to cancel the remained dwell time in rx process */
1738                 set_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status);
1739         }
1740
1741         p2p->af_sent_channel = 0;
1742         set_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status);
1743         /* validate channel and p2p ies */
1744         if (config_af_params.search_channel &&
1745             IS_P2P_SOCIAL_CHANNEL(le32_to_cpu(af_params->channel)) &&
1746             p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif->saved_ie.probe_req_ie_len) {
1747                 afx_hdl = &p2p->afx_hdl;
1748                 afx_hdl->peer_listen_chan = le32_to_cpu(af_params->channel);
1749
1750                 if (brcmf_p2p_af_searching_channel(p2p) ==
1751                                                         P2P_INVALID_CHANNEL) {
1752                         brcmf_err("Couldn't find peer's channel.\n");
1753                         goto exit;
1754                 }
1755
1756                 /* Abort scan even for VSDB scenarios. Scan gets aborted in
1757                  * firmware but after the check of piggyback algorithm. To take
1758                  * care of current piggback algo, lets abort the scan here
1759                  * itself.
1760                  */
1761                 brcmf_notify_escan_complete(cfg, ifp, true, true);
1762
1763                 /* update channel */
1764                 af_params->channel = cpu_to_le32(afx_hdl->peer_chan);
1765         }
1766
1767         tx_retry = 0;
1768         while (!p2p->block_gon_req_tx &&
1769                (ack == false) && (tx_retry < P2P_AF_TX_MAX_RETRY)) {
1770                 ack = !brcmf_p2p_tx_action_frame(p2p, af_params);
1771                 tx_retry++;
1772         }
1773         if (ack == false) {
1774                 brcmf_err("Failed to send Action Frame(retry %d)\n", tx_retry);
1775                 clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status);
1776         }
1777
1778 exit:
1779         clear_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status);
1780
1781         /* WAR: sometimes dongle does not keep the dwell time of 'actframe'.
1782          * if we coundn't get the next action response frame and dongle does
1783          * not keep the dwell time, go to listen state again to get next action
1784          * response frame.
1785          */
1786         if (ack && config_af_params.extra_listen && !p2p->block_gon_req_tx &&
1787             test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status) &&
1788             p2p->af_sent_channel == afx_hdl->my_listen_chan) {
1789                 delta_ms = jiffies_to_msecs(jiffies - p2p->af_tx_sent_jiffies);
1790                 if (le32_to_cpu(af_params->dwell_time) > delta_ms)
1791                         extra_listen_time = le32_to_cpu(af_params->dwell_time) -
1792                                             delta_ms;
1793                 else
1794                         extra_listen_time = 0;
1795                 if (extra_listen_time > 50) {
1796                         set_bit(BRCMF_P2P_STATUS_WAITING_NEXT_AF_LISTEN,
1797                                 &p2p->status);
1798                         brcmf_dbg(INFO, "Wait more time! actual af time:%d, calculated extra listen:%d\n",
1799                                   le32_to_cpu(af_params->dwell_time),
1800                                   extra_listen_time);
1801                         extra_listen_time += 100;
1802                         if (!brcmf_p2p_discover_listen(p2p,
1803                                                        p2p->af_sent_channel,
1804                                                        extra_listen_time)) {
1805                                 unsigned long duration;
1806
1807                                 extra_listen_time += 100;
1808                                 duration = msecs_to_jiffies(extra_listen_time);
1809                                 wait_for_completion_timeout(&p2p->wait_next_af,
1810                                                             duration);
1811                         }
1812                         clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_AF_LISTEN,
1813                                   &p2p->status);
1814                 }
1815         }
1816
1817         if (p2p->block_gon_req_tx) {
1818                 /* if ack is true, supplicant will wait more time(100ms).
1819                  * so we will return it as a success to get more time .
1820                  */
1821                 p2p->block_gon_req_tx = false;
1822                 ack = true;
1823         }
1824
1825         clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status);
1826         /* if all done, turn mpc on again */
1827         if (config_af_params.mpc_onoff == 1)
1828                 brcmf_set_mpc(ifp, 1);
1829
1830         return ack;
1831 }
1832
1833 /**
1834  * brcmf_p2p_notify_rx_mgmt_p2p_probereq() - Event handler for p2p probe req.
1835  *
1836  * @ifp: interface pointer for which event was received.
1837  * @e: even message.
1838  * @data: payload of event message (probe request).
1839  */
1840 s32 brcmf_p2p_notify_rx_mgmt_p2p_probereq(struct brcmf_if *ifp,
1841                                           const struct brcmf_event_msg *e,
1842                                           void *data)
1843 {
1844         struct brcmf_cfg80211_info *cfg = ifp->drvr->config;
1845         struct brcmf_p2p_info *p2p = &cfg->p2p;
1846         struct afx_hdl *afx_hdl = &p2p->afx_hdl;
1847         struct brcmf_cfg80211_vif *vif = ifp->vif;
1848         struct brcmf_rx_mgmt_data *rxframe = (struct brcmf_rx_mgmt_data *)data;
1849         struct brcmu_chan ch;
1850         u8 *mgmt_frame;
1851         u32 mgmt_frame_len;
1852         s32 freq;
1853         u16 mgmt_type;
1854
1855         brcmf_dbg(INFO, "Enter: event %d reason %d\n", e->event_code,
1856                   e->reason);
1857
1858         if (e->datalen < sizeof(*rxframe)) {
1859                 brcmf_dbg(SCAN, "Event data to small. Ignore\n");
1860                 return 0;
1861         }
1862
1863         ch.chspec = be16_to_cpu(rxframe->chanspec);
1864         cfg->d11inf.decchspec(&ch);
1865
1866         if (test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status) &&
1867             (ether_addr_equal(afx_hdl->tx_dst_addr, e->addr))) {
1868                 afx_hdl->peer_chan = ch.control_ch_num;
1869                 brcmf_dbg(INFO, "PROBE REQUEST: Peer found, channel=%d\n",
1870                           afx_hdl->peer_chan);
1871                 complete(&afx_hdl->act_frm_scan);
1872         }
1873
1874         /* Firmware sends us two proberesponses for each idx one. At the */
1875         /* moment anything but bsscfgidx 0 is passed up to supplicant    */
1876         if (e->bsscfgidx == 0)
1877                 return 0;
1878
1879         /* Filter any P2P probe reqs arriving during the GO-NEG Phase */
1880         if (test_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status)) {
1881                 brcmf_dbg(INFO, "Filtering P2P probe_req in GO-NEG phase\n");
1882                 return 0;
1883         }
1884
1885         /* Check if wpa_supplicant has registered for this frame */
1886         brcmf_dbg(INFO, "vif->mgmt_rx_reg %04x\n", vif->mgmt_rx_reg);
1887         mgmt_type = (IEEE80211_STYPE_PROBE_REQ & IEEE80211_FCTL_STYPE) >> 4;
1888         if ((vif->mgmt_rx_reg & BIT(mgmt_type)) == 0)
1889                 return 0;
1890
1891         mgmt_frame = (u8 *)(rxframe + 1);
1892         mgmt_frame_len = e->datalen - sizeof(*rxframe);
1893         freq = ieee80211_channel_to_frequency(ch.control_ch_num,
1894                                               ch.band == BRCMU_CHAN_BAND_2G ?
1895                                               NL80211_BAND_2GHZ :
1896                                               NL80211_BAND_5GHZ);
1897
1898         cfg80211_rx_mgmt(&vif->wdev, freq, 0, mgmt_frame, mgmt_frame_len, 0);
1899
1900         brcmf_dbg(INFO, "mgmt_frame_len (%d) , e->datalen (%d), chanspec (%04x), freq (%d)\n",
1901                   mgmt_frame_len, e->datalen, ch.chspec, freq);
1902
1903         return 0;
1904 }
1905
1906
1907 /**
1908  * brcmf_p2p_get_current_chanspec() - Get current operation channel.
1909  *
1910  * @p2p: P2P specific data.
1911  * @chanspec: chanspec to be returned.
1912  */
1913 static void brcmf_p2p_get_current_chanspec(struct brcmf_p2p_info *p2p,
1914                                            u16 *chanspec)
1915 {
1916         struct brcmf_if *ifp;
1917         u8 mac_addr[ETH_ALEN];
1918         struct brcmu_chan ch;
1919         struct brcmf_bss_info_le *bi;
1920         u8 *buf;
1921
1922         ifp = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->ifp;
1923
1924         if (brcmf_fil_cmd_data_get(ifp, BRCMF_C_GET_BSSID, mac_addr,
1925                                    ETH_ALEN) == 0) {
1926                 buf = kzalloc(WL_BSS_INFO_MAX, GFP_KERNEL);
1927                 if (buf != NULL) {
1928                         *(__le32 *)buf = cpu_to_le32(WL_BSS_INFO_MAX);
1929                         if (brcmf_fil_cmd_data_get(ifp, BRCMF_C_GET_BSS_INFO,
1930                                                    buf, WL_BSS_INFO_MAX) == 0) {
1931                                 bi = (struct brcmf_bss_info_le *)(buf + 4);
1932                                 *chanspec = le16_to_cpu(bi->chanspec);
1933                                 kfree(buf);
1934                                 return;
1935                         }
1936                         kfree(buf);
1937                 }
1938         }
1939         /* Use default channel for P2P */
1940         ch.chnum = BRCMF_P2P_TEMP_CHAN;
1941         ch.bw = BRCMU_CHAN_BW_20;
1942         p2p->cfg->d11inf.encchspec(&ch);
1943         *chanspec = ch.chspec;
1944 }
1945
1946 /**
1947  * Change a P2P Role.
1948  * Parameters:
1949  * @mac: MAC address of the BSS to change a role
1950  * Returns 0 if success.
1951  */
1952 int brcmf_p2p_ifchange(struct brcmf_cfg80211_info *cfg,
1953                        enum brcmf_fil_p2p_if_types if_type)
1954 {
1955         struct brcmf_p2p_info *p2p = &cfg->p2p;
1956         struct brcmf_cfg80211_vif *vif;
1957         struct brcmf_fil_p2p_if_le if_request;
1958         s32 err;
1959         u16 chanspec;
1960
1961         brcmf_dbg(TRACE, "Enter\n");
1962
1963         vif = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif;
1964         if (!vif) {
1965                 brcmf_err("vif for P2PAPI_BSSCFG_PRIMARY does not exist\n");
1966                 return -EPERM;
1967         }
1968         brcmf_notify_escan_complete(cfg, vif->ifp, true, true);
1969         vif = p2p->bss_idx[P2PAPI_BSSCFG_CONNECTION].vif;
1970         if (!vif) {
1971                 brcmf_err("vif for P2PAPI_BSSCFG_CONNECTION does not exist\n");
1972                 return -EPERM;
1973         }
1974         brcmf_set_mpc(vif->ifp, 0);
1975
1976         /* In concurrency case, STA may be already associated in a particular */
1977         /* channel. so retrieve the current channel of primary interface and  */
1978         /* then start the virtual interface on that.                          */
1979         brcmf_p2p_get_current_chanspec(p2p, &chanspec);
1980
1981         if_request.type = cpu_to_le16((u16)if_type);
1982         if_request.chspec = cpu_to_le16(chanspec);
1983         memcpy(if_request.addr, p2p->int_addr, sizeof(if_request.addr));
1984
1985         brcmf_cfg80211_arm_vif_event(cfg, vif);
1986         err = brcmf_fil_iovar_data_set(vif->ifp, "p2p_ifupd", &if_request,
1987                                        sizeof(if_request));
1988         if (err) {
1989                 brcmf_err("p2p_ifupd FAILED, err=%d\n", err);
1990                 brcmf_cfg80211_arm_vif_event(cfg, NULL);
1991                 return err;
1992         }
1993         err = brcmf_cfg80211_wait_vif_event(cfg, BRCMF_E_IF_CHANGE,
1994                                             BRCMF_VIF_EVENT_TIMEOUT);
1995         brcmf_cfg80211_arm_vif_event(cfg, NULL);
1996         if (!err)  {
1997                 brcmf_err("No BRCMF_E_IF_CHANGE event received\n");
1998                 return -EIO;
1999         }
2000
2001         err = brcmf_fil_cmd_int_set(vif->ifp, BRCMF_C_SET_SCB_TIMEOUT,
2002                                     BRCMF_SCB_TIMEOUT_VALUE);
2003
2004         return err;
2005 }
2006
2007 static int brcmf_p2p_request_p2p_if(struct brcmf_p2p_info *p2p,
2008                                     struct brcmf_if *ifp, u8 ea[ETH_ALEN],
2009                                     enum brcmf_fil_p2p_if_types iftype)
2010 {
2011         struct brcmf_fil_p2p_if_le if_request;
2012         int err;
2013         u16 chanspec;
2014
2015         /* we need a default channel */
2016         brcmf_p2p_get_current_chanspec(p2p, &chanspec);
2017
2018         /* fill the firmware request */
2019         memcpy(if_request.addr, ea, ETH_ALEN);
2020         if_request.type = cpu_to_le16((u16)iftype);
2021         if_request.chspec = cpu_to_le16(chanspec);
2022
2023         err = brcmf_fil_iovar_data_set(ifp, "p2p_ifadd", &if_request,
2024                                        sizeof(if_request));
2025
2026         return err;
2027 }
2028
2029 static int brcmf_p2p_disable_p2p_if(struct brcmf_cfg80211_vif *vif)
2030 {
2031         struct brcmf_cfg80211_info *cfg = wdev_to_cfg(&vif->wdev);
2032         struct net_device *pri_ndev = cfg_to_ndev(cfg);
2033         struct brcmf_if *ifp = netdev_priv(pri_ndev);
2034         u8 *addr = vif->wdev.netdev->dev_addr;
2035
2036         return brcmf_fil_iovar_data_set(ifp, "p2p_ifdis", addr, ETH_ALEN);
2037 }
2038
2039 static int brcmf_p2p_release_p2p_if(struct brcmf_cfg80211_vif *vif)
2040 {
2041         struct brcmf_cfg80211_info *cfg = wdev_to_cfg(&vif->wdev);
2042         struct net_device *pri_ndev = cfg_to_ndev(cfg);
2043         struct brcmf_if *ifp = netdev_priv(pri_ndev);
2044         u8 *addr = vif->wdev.netdev->dev_addr;
2045
2046         return brcmf_fil_iovar_data_set(ifp, "p2p_ifdel", addr, ETH_ALEN);
2047 }
2048
2049 /**
2050  * brcmf_p2p_create_p2pdev() - create a P2P_DEVICE virtual interface.
2051  *
2052  * @p2p: P2P specific data.
2053  * @wiphy: wiphy device of new interface.
2054  * @addr: mac address for this new interface.
2055  */
2056 static struct wireless_dev *brcmf_p2p_create_p2pdev(struct brcmf_p2p_info *p2p,
2057                                                     struct wiphy *wiphy,
2058                                                     u8 *addr)
2059 {
2060         struct brcmf_cfg80211_vif *p2p_vif;
2061         struct brcmf_if *p2p_ifp;
2062         struct brcmf_if *pri_ifp;
2063         int err;
2064         u32 bsscfgidx;
2065
2066         if (p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif)
2067                 return ERR_PTR(-ENOSPC);
2068
2069         p2p_vif = brcmf_alloc_vif(p2p->cfg, NL80211_IFTYPE_P2P_DEVICE);
2070         if (IS_ERR(p2p_vif)) {
2071                 brcmf_err("could not create discovery vif\n");
2072                 return (struct wireless_dev *)p2p_vif;
2073         }
2074
2075         pri_ifp = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->ifp;
2076
2077         /* firmware requires unique mac address for p2pdev interface */
2078         if (addr && ether_addr_equal(addr, pri_ifp->mac_addr)) {
2079                 brcmf_err("discovery vif must be different from primary interface\n");
2080                 return ERR_PTR(-EINVAL);
2081         }
2082
2083         brcmf_p2p_generate_bss_mac(p2p, addr);
2084         brcmf_p2p_set_firmware(pri_ifp, p2p->dev_addr);
2085
2086         brcmf_cfg80211_arm_vif_event(p2p->cfg, p2p_vif);
2087         brcmf_fweh_p2pdev_setup(pri_ifp, true);
2088
2089         /* Initialize P2P Discovery in the firmware */
2090         err = brcmf_fil_iovar_int_set(pri_ifp, "p2p_disc", 1);
2091         if (err < 0) {
2092                 brcmf_err("set p2p_disc error\n");
2093                 brcmf_fweh_p2pdev_setup(pri_ifp, false);
2094                 brcmf_cfg80211_arm_vif_event(p2p->cfg, NULL);
2095                 goto fail;
2096         }
2097
2098         /* wait for firmware event */
2099         err = brcmf_cfg80211_wait_vif_event(p2p->cfg, BRCMF_E_IF_ADD,
2100                                             BRCMF_VIF_EVENT_TIMEOUT);
2101         brcmf_cfg80211_arm_vif_event(p2p->cfg, NULL);
2102         brcmf_fweh_p2pdev_setup(pri_ifp, false);
2103         if (!err) {
2104                 brcmf_err("timeout occurred\n");
2105                 err = -EIO;
2106                 goto fail;
2107         }
2108
2109         /* discovery interface created */
2110         p2p_ifp = p2p_vif->ifp;
2111         p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif = p2p_vif;
2112         memcpy(p2p_ifp->mac_addr, p2p->dev_addr, ETH_ALEN);
2113         memcpy(&p2p_vif->wdev.address, p2p->dev_addr, sizeof(p2p->dev_addr));
2114
2115         /* verify bsscfg index for P2P discovery */
2116         err = brcmf_fil_iovar_int_get(pri_ifp, "p2p_dev", &bsscfgidx);
2117         if (err < 0) {
2118                 brcmf_err("retrieving discover bsscfg index failed\n");
2119                 goto fail;
2120         }
2121
2122         WARN_ON(p2p_ifp->bsscfgidx != bsscfgidx);
2123
2124         init_completion(&p2p->send_af_done);
2125         INIT_WORK(&p2p->afx_hdl.afx_work, brcmf_p2p_afx_handler);
2126         init_completion(&p2p->afx_hdl.act_frm_scan);
2127         init_completion(&p2p->wait_next_af);
2128
2129         return &p2p_vif->wdev;
2130
2131 fail:
2132         brcmf_free_vif(p2p_vif);
2133         return ERR_PTR(err);
2134 }
2135
2136 /**
2137  * brcmf_p2p_add_vif() - create a new P2P virtual interface.
2138  *
2139  * @wiphy: wiphy device of new interface.
2140  * @name: name of the new interface.
2141  * @name_assign_type: origin of the interface name
2142  * @type: nl80211 interface type.
2143  * @params: contains mac address for P2P device.
2144  */
2145 struct wireless_dev *brcmf_p2p_add_vif(struct wiphy *wiphy, const char *name,
2146                                        unsigned char name_assign_type,
2147                                        enum nl80211_iftype type,
2148                                        struct vif_params *params)
2149 {
2150         struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
2151         struct brcmf_if *ifp = netdev_priv(cfg_to_ndev(cfg));
2152         struct brcmf_cfg80211_vif *vif;
2153         enum brcmf_fil_p2p_if_types iftype;
2154         int err;
2155
2156         if (brcmf_cfg80211_vif_event_armed(cfg))
2157                 return ERR_PTR(-EBUSY);
2158
2159         brcmf_dbg(INFO, "adding vif \"%s\" (type=%d)\n", name, type);
2160
2161         switch (type) {
2162         case NL80211_IFTYPE_P2P_CLIENT:
2163                 iftype = BRCMF_FIL_P2P_IF_CLIENT;
2164                 break;
2165         case NL80211_IFTYPE_P2P_GO:
2166                 iftype = BRCMF_FIL_P2P_IF_GO;
2167                 break;
2168         case NL80211_IFTYPE_P2P_DEVICE:
2169                 return brcmf_p2p_create_p2pdev(&cfg->p2p, wiphy,
2170                                                params->macaddr);
2171         default:
2172                 return ERR_PTR(-EOPNOTSUPP);
2173         }
2174
2175         vif = brcmf_alloc_vif(cfg, type);
2176         if (IS_ERR(vif))
2177                 return (struct wireless_dev *)vif;
2178         brcmf_cfg80211_arm_vif_event(cfg, vif);
2179
2180         err = brcmf_p2p_request_p2p_if(&cfg->p2p, ifp, cfg->p2p.int_addr,
2181                                        iftype);
2182         if (err) {
2183                 brcmf_cfg80211_arm_vif_event(cfg, NULL);
2184                 goto fail;
2185         }
2186
2187         /* wait for firmware event */
2188         err = brcmf_cfg80211_wait_vif_event(cfg, BRCMF_E_IF_ADD,
2189                                             BRCMF_VIF_EVENT_TIMEOUT);
2190         brcmf_cfg80211_arm_vif_event(cfg, NULL);
2191         if (!err) {
2192                 brcmf_err("timeout occurred\n");
2193                 err = -EIO;
2194                 goto fail;
2195         }
2196
2197         /* interface created in firmware */
2198         ifp = vif->ifp;
2199         if (!ifp) {
2200                 brcmf_err("no if pointer provided\n");
2201                 err = -ENOENT;
2202                 goto fail;
2203         }
2204
2205         strncpy(ifp->ndev->name, name, sizeof(ifp->ndev->name) - 1);
2206         ifp->ndev->name_assign_type = name_assign_type;
2207         err = brcmf_net_attach(ifp, true);
2208         if (err) {
2209                 brcmf_err("Registering netdevice failed\n");
2210                 free_netdev(ifp->ndev);
2211                 goto fail;
2212         }
2213
2214         cfg->p2p.bss_idx[P2PAPI_BSSCFG_CONNECTION].vif = vif;
2215         /* Disable firmware roaming for P2P interface  */
2216         brcmf_fil_iovar_int_set(ifp, "roam_off", 1);
2217         if (iftype == BRCMF_FIL_P2P_IF_GO) {
2218                 /* set station timeout for p2p */
2219                 brcmf_fil_cmd_int_set(ifp, BRCMF_C_SET_SCB_TIMEOUT,
2220                                       BRCMF_SCB_TIMEOUT_VALUE);
2221         }
2222         return &ifp->vif->wdev;
2223
2224 fail:
2225         brcmf_free_vif(vif);
2226         return ERR_PTR(err);
2227 }
2228
2229 /**
2230  * brcmf_p2p_del_vif() - delete a P2P virtual interface.
2231  *
2232  * @wiphy: wiphy device of interface.
2233  * @wdev: wireless device of interface.
2234  */
2235 int brcmf_p2p_del_vif(struct wiphy *wiphy, struct wireless_dev *wdev)
2236 {
2237         struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
2238         struct brcmf_p2p_info *p2p = &cfg->p2p;
2239         struct brcmf_cfg80211_vif *vif;
2240         enum nl80211_iftype iftype;
2241         bool wait_for_disable = false;
2242         int err;
2243
2244         brcmf_dbg(TRACE, "delete P2P vif\n");
2245         vif = container_of(wdev, struct brcmf_cfg80211_vif, wdev);
2246
2247         iftype = vif->wdev.iftype;
2248         brcmf_cfg80211_arm_vif_event(cfg, vif);
2249         switch (iftype) {
2250         case NL80211_IFTYPE_P2P_CLIENT:
2251                 if (test_bit(BRCMF_VIF_STATUS_DISCONNECTING, &vif->sme_state))
2252                         wait_for_disable = true;
2253                 break;
2254
2255         case NL80211_IFTYPE_P2P_GO:
2256                 if (!brcmf_p2p_disable_p2p_if(vif))
2257                         wait_for_disable = true;
2258                 break;
2259
2260         case NL80211_IFTYPE_P2P_DEVICE:
2261                 if (!p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif)
2262                         return 0;
2263                 brcmf_p2p_cancel_remain_on_channel(vif->ifp);
2264                 brcmf_p2p_deinit_discovery(p2p);
2265                 break;
2266
2267         default:
2268                 return -ENOTSUPP;
2269         }
2270
2271         clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status);
2272         brcmf_dbg(INFO, "P2P: GO_NEG_PHASE status cleared\n");
2273
2274         if (wait_for_disable)
2275                 wait_for_completion_timeout(&cfg->vif_disabled,
2276                                             BRCMF_P2P_DISABLE_TIMEOUT);
2277
2278         err = 0;
2279         if (iftype != NL80211_IFTYPE_P2P_DEVICE) {
2280                 brcmf_vif_clear_mgmt_ies(vif);
2281                 err = brcmf_p2p_release_p2p_if(vif);
2282         }
2283         if (!err) {
2284                 /* wait for firmware event */
2285                 err = brcmf_cfg80211_wait_vif_event(cfg, BRCMF_E_IF_DEL,
2286                                                     BRCMF_VIF_EVENT_TIMEOUT);
2287                 if (!err)
2288                         err = -EIO;
2289                 else
2290                         err = 0;
2291         }
2292         brcmf_remove_interface(vif->ifp, true);
2293
2294         brcmf_cfg80211_arm_vif_event(cfg, NULL);
2295         if (iftype != NL80211_IFTYPE_P2P_DEVICE)
2296                 p2p->bss_idx[P2PAPI_BSSCFG_CONNECTION].vif = NULL;
2297
2298         return err;
2299 }
2300
2301 void brcmf_p2p_ifp_removed(struct brcmf_if *ifp, bool rtnl_locked)
2302 {
2303         struct brcmf_cfg80211_info *cfg;
2304         struct brcmf_cfg80211_vif *vif;
2305
2306         brcmf_dbg(INFO, "P2P: device interface removed\n");
2307         vif = ifp->vif;
2308         cfg = wdev_to_cfg(&vif->wdev);
2309         cfg->p2p.bss_idx[P2PAPI_BSSCFG_DEVICE].vif = NULL;
2310         if (!rtnl_locked)
2311                 rtnl_lock();
2312         cfg80211_unregister_wdev(&vif->wdev);
2313         if (!rtnl_locked)
2314                 rtnl_unlock();
2315         brcmf_free_vif(vif);
2316 }
2317
2318 int brcmf_p2p_start_device(struct wiphy *wiphy, struct wireless_dev *wdev)
2319 {
2320         struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
2321         struct brcmf_p2p_info *p2p = &cfg->p2p;
2322         struct brcmf_cfg80211_vif *vif;
2323         int err;
2324
2325         vif = container_of(wdev, struct brcmf_cfg80211_vif, wdev);
2326         mutex_lock(&cfg->usr_sync);
2327         err = brcmf_p2p_enable_discovery(p2p);
2328         if (!err)
2329                 set_bit(BRCMF_VIF_STATUS_READY, &vif->sme_state);
2330         mutex_unlock(&cfg->usr_sync);
2331         return err;
2332 }
2333
2334 void brcmf_p2p_stop_device(struct wiphy *wiphy, struct wireless_dev *wdev)
2335 {
2336         struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
2337         struct brcmf_p2p_info *p2p = &cfg->p2p;
2338         struct brcmf_cfg80211_vif *vif;
2339
2340         vif = container_of(wdev, struct brcmf_cfg80211_vif, wdev);
2341         /* This call can be result of the unregister_wdev call. In that case
2342          * we dont want to do anything anymore. Just return. The config vif
2343          * will have been cleared at this point.
2344          */
2345         if (p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif == vif) {
2346                 mutex_lock(&cfg->usr_sync);
2347                 /* Set the discovery state to SCAN */
2348                 (void)brcmf_p2p_set_discover_state(vif->ifp,
2349                                                    WL_P2P_DISC_ST_SCAN, 0, 0);
2350                 brcmf_abort_scanning(cfg);
2351                 clear_bit(BRCMF_VIF_STATUS_READY, &vif->sme_state);
2352                 mutex_unlock(&cfg->usr_sync);
2353         }
2354 }
2355
2356 /**
2357  * brcmf_p2p_attach() - attach for P2P.
2358  *
2359  * @cfg: driver private data for cfg80211 interface.
2360  * @p2pdev_forced: create p2p device interface at attach.
2361  */
2362 s32 brcmf_p2p_attach(struct brcmf_cfg80211_info *cfg, bool p2pdev_forced)
2363 {
2364         struct brcmf_p2p_info *p2p;
2365         struct brcmf_if *pri_ifp;
2366         s32 err = 0;
2367         void *err_ptr;
2368
2369         p2p = &cfg->p2p;
2370         p2p->cfg = cfg;
2371
2372         pri_ifp = brcmf_get_ifp(cfg->pub, 0);
2373         p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif = pri_ifp->vif;
2374
2375         if (p2pdev_forced) {
2376                 err_ptr = brcmf_p2p_create_p2pdev(p2p, NULL, NULL);
2377                 if (IS_ERR(err_ptr)) {
2378                         brcmf_err("P2P device creation failed.\n");
2379                         err = PTR_ERR(err_ptr);
2380                 }
2381         } else {
2382                 p2p->p2pdev_dynamically = true;
2383         }
2384         return err;
2385 }
2386
2387 /**
2388  * brcmf_p2p_detach() - detach P2P.
2389  *
2390  * @p2p: P2P specific data.
2391  */
2392 void brcmf_p2p_detach(struct brcmf_p2p_info *p2p)
2393 {
2394         struct brcmf_cfg80211_vif *vif;
2395
2396         vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif;
2397         if (vif != NULL) {
2398                 brcmf_p2p_cancel_remain_on_channel(vif->ifp);
2399                 brcmf_p2p_deinit_discovery(p2p);
2400                 brcmf_remove_interface(vif->ifp, false);
2401         }
2402         /* just set it all to zero */
2403         memset(p2p, 0, sizeof(*p2p));
2404 }
2405