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

   1 /*
   2  * Copyright (c) 2012 Broadcom Corporation
   3  *
   4  * Permission to use, copy, modify, and/or distribute this software for any
   5  * purpose with or without fee is hereby granted, provided that the above
   6  * copyright notice and this permission notice appear in all copies.
   7  *
   8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
  11  * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
  13  * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
  14  * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15  */
  16 #include <linux/slab.h>
  17 #include <linux/netdevice.h>
  18 #include <linux/etherdevice.h>
  19 #include <linux/rtnetlink.h>
  20 #include <net/cfg80211.h>
  21
  22 #include <brcmu_wifi.h>
  23 #include <brcmu_utils.h>
  24 #include <defs.h>
  25 #include "core.h"
  26 #include "debug.h"
  27 #include "fwil.h"
  28 #include "fwil_types.h"
  29 #include "p2p.h"
  30 #include "cfg80211.h"
  31
  32 /* parameters used for p2p escan */
  33 #define P2PAPI_SCAN_NPROBES 1
  34 #define P2PAPI_SCAN_DWELL_TIME_MS 80
  35 #define P2PAPI_SCAN_SOCIAL_DWELL_TIME_MS 40
  36 #define P2PAPI_SCAN_HOME_TIME_MS 60
  37 #define P2PAPI_SCAN_NPROBS_TIME_MS 30
  38 #define P2PAPI_SCAN_AF_SEARCH_DWELL_TIME_MS 100
  39 #define WL_SCAN_CONNECT_DWELL_TIME_MS 200
  40 #define WL_SCAN_JOIN_PROBE_INTERVAL_MS 20
  41
  42 #define BRCMF_P2P_WILDCARD_SSID         "DIRECT-"
  43 #define BRCMF_P2P_WILDCARD_SSID_LEN     (sizeof(BRCMF_P2P_WILDCARD_SSID) - 1)
  44
  45 #define SOCIAL_CHAN_1           1
  46 #define SOCIAL_CHAN_2           6
  47 #define SOCIAL_CHAN_3           11
  48 #define IS_P2P_SOCIAL_CHANNEL(channel) ((channel == SOCIAL_CHAN_1) || \
  49                                          (channel == SOCIAL_CHAN_2) || \
  50                                          (channel == SOCIAL_CHAN_3))
  51 #define BRCMF_P2P_TEMP_CHAN     SOCIAL_CHAN_3
  52 #define SOCIAL_CHAN_CNT         3
  53 #define AF_PEER_SEARCH_CNT      2
  54
  55 #define BRCMF_SCB_TIMEOUT_VALUE 20
  56
  57 #define P2P_VER                 9       /* P2P version: 9=WiFi P2P v1.0 */
  58 #define P2P_PUB_AF_CATEGORY     0x04
  59 #define P2P_PUB_AF_ACTION       0x09
  60 #define P2P_AF_CATEGORY         0x7f
  61 #define P2P_OUI                 "\x50\x6F\x9A"  /* P2P OUI */
  62 #define P2P_OUI_LEN             3               /* P2P OUI length */
  63
  64 /* Action Frame Constants */
  65 #define DOT11_ACTION_HDR_LEN    2       /* action frame category + action */
  66 #define DOT11_ACTION_CAT_OFF    0       /* category offset */
  67 #define DOT11_ACTION_ACT_OFF    1       /* action offset */
  68
  69 #define P2P_AF_DWELL_TIME               200
  70 #define P2P_AF_MIN_DWELL_TIME           100
  71 #define P2P_AF_MED_DWELL_TIME           400
  72 #define P2P_AF_LONG_DWELL_TIME          1000
  73 #define P2P_AF_TX_MAX_RETRY             1
  74 #define P2P_AF_MAX_WAIT_TIME            msecs_to_jiffies(2000)
  75 #define P2P_INVALID_CHANNEL             -1
  76 #define P2P_CHANNEL_SYNC_RETRY          5
  77 #define P2P_AF_FRM_SCAN_MAX_WAIT        msecs_to_jiffies(450)
  78 #define P2P_DEFAULT_SLEEP_TIME_VSDB     200
  79
  80 /* WiFi P2P Public Action Frame OUI Subtypes */
  81 #define P2P_PAF_GON_REQ         0       /* Group Owner Negotiation Req */
  82 #define P2P_PAF_GON_RSP         1       /* Group Owner Negotiation Rsp */
  83 #define P2P_PAF_GON_CONF        2       /* Group Owner Negotiation Confirm */
  84 #define P2P_PAF_INVITE_REQ      3       /* P2P Invitation Request */
  85 #define P2P_PAF_INVITE_RSP      4       /* P2P Invitation Response */
  86 #define P2P_PAF_DEVDIS_REQ      5       /* Device Discoverability Request */
  87 #define P2P_PAF_DEVDIS_RSP      6       /* Device Discoverability Response */
  88 #define P2P_PAF_PROVDIS_REQ     7       /* Provision Discovery Request */
  89 #define P2P_PAF_PROVDIS_RSP     8       /* Provision Discovery Response */
  90 #define P2P_PAF_SUBTYPE_INVALID 255     /* Invalid Subtype */
  91
  92 /* WiFi P2P Action Frame OUI Subtypes */
  93 #define P2P_AF_NOTICE_OF_ABSENCE        0       /* Notice of Absence */
  94 #define P2P_AF_PRESENCE_REQ             1       /* P2P Presence Request */
  95 #define P2P_AF_PRESENCE_RSP             2       /* P2P Presence Response */
  96 #define P2P_AF_GO_DISC_REQ              3       /* GO Discoverability Request */
  97
  98 /* P2P Service Discovery related */
  99 #define P2PSD_ACTION_CATEGORY           0x04    /* Public action frame */
 100 #define P2PSD_ACTION_ID_GAS_IREQ        0x0a    /* GAS Initial Request AF */
 101 #define P2PSD_ACTION_ID_GAS_IRESP       0x0b    /* GAS Initial Response AF */
 102 #define P2PSD_ACTION_ID_GAS_CREQ        0x0c    /* GAS Comback Request AF */
 103 #define P2PSD_ACTION_ID_GAS_CRESP       0x0d    /* GAS Comback Response AF */
 104
 105 #define BRCMF_P2P_DISABLE_TIMEOUT       msecs_to_jiffies(500)
 106 /**
 107  * struct brcmf_p2p_disc_st_le - set discovery state in firmware.
 108  *
 109  * @state: requested discovery state (see enum brcmf_p2p_disc_state).
 110  * @chspec: channel parameter for %WL_P2P_DISC_ST_LISTEN state.
 111  * @dwell: dwell time in ms for %WL_P2P_DISC_ST_LISTEN state.
 112  */
 113 struct brcmf_p2p_disc_st_le {
 114         u8 state;
 115         __le16 chspec;
 116         __le16 dwell;
 117 };
 118
 119 /**
 120  * enum brcmf_p2p_disc_state - P2P discovery state values
 121  *
 122  * @WL_P2P_DISC_ST_SCAN: P2P discovery with wildcard SSID and P2P IE.
 123  * @WL_P2P_DISC_ST_LISTEN: P2P discovery off-channel for specified time.
 124  * @WL_P2P_DISC_ST_SEARCH: P2P discovery with P2P wildcard SSID and P2P IE.
 125  */
 126 enum brcmf_p2p_disc_state {
 127         WL_P2P_DISC_ST_SCAN,
 128         WL_P2P_DISC_ST_LISTEN,
 129         WL_P2P_DISC_ST_SEARCH
 130 };
 131
 132 /**
 133  * struct brcmf_p2p_scan_le - P2P specific scan request.
 134  *
 135  * @type: type of scan method requested (values: 'E' or 'S').
 136  * @reserved: reserved (ignored).
 137  * @eparams: parameters used for type 'E'.
 138  * @sparams: parameters used for type 'S'.
 139  */
 140 struct brcmf_p2p_scan_le {
 141         u8 type;
 142         u8 reserved[3];
 143         union {
 144                 struct brcmf_escan_params_le eparams;
 145                 struct brcmf_scan_params_le sparams;
 146         };
 147 };
 148
 149 /**
 150  * struct brcmf_p2p_pub_act_frame - WiFi P2P Public Action Frame
 151  *
 152  * @category: P2P_PUB_AF_CATEGORY
 153  * @action: P2P_PUB_AF_ACTION
 154  * @oui[3]: P2P_OUI
 155  * @oui_type: OUI type - P2P_VER
 156  * @subtype: OUI subtype - P2P_TYPE_*
 157  * @dialog_token: nonzero, identifies req/rsp transaction
 158  * @elts[1]: Variable length information elements.
 159  */
 160 struct brcmf_p2p_pub_act_frame {
 161         u8      category;
 162         u8      action;
 163         u8      oui[3];
 164         u8      oui_type;
 165         u8      subtype;
 166         u8      dialog_token;
 167         u8      elts[1];
 168 };
 169
 170 /**
 171  * struct brcmf_p2p_action_frame - WiFi P2P Action Frame
 172  *
 173  * @category: P2P_AF_CATEGORY
 174  * @OUI[3]: OUI - P2P_OUI
 175  * @type: OUI Type - P2P_VER
 176  * @subtype: OUI Subtype - P2P_AF_*
 177  * @dialog_token: nonzero, identifies req/resp tranaction
 178  * @elts[1]: Variable length information elements.
 179  */
 180 struct brcmf_p2p_action_frame {
 181         u8      category;
 182         u8      oui[3];
 183         u8      type;
 184         u8      subtype;
 185         u8      dialog_token;
 186         u8      elts[1];
 187 };
 188
 189 /**
 190  * struct brcmf_p2psd_gas_pub_act_frame - Wi-Fi GAS Public Action Frame
 191  *
 192  * @category: 0x04 Public Action Frame
 193  * @action: 0x6c Advertisement Protocol
 194  * @dialog_token: nonzero, identifies req/rsp transaction
 195  * @query_data[1]: Query Data. SD gas ireq SD gas iresp
 196  */
 197 struct brcmf_p2psd_gas_pub_act_frame {
 198         u8      category;
 199         u8      action;
 200         u8      dialog_token;
 201         u8      query_data[1];
 202 };
 203
 204 /**
 205  * struct brcmf_config_af_params - Action Frame Parameters for tx.
 206  *
 207  * @mpc_onoff: To make sure to send successfully action frame, we have to
 208  *             turn off mpc  0: off, 1: on,  (-1): do nothing
 209  * @search_channel: 1: search peer's channel to send af
 210  * extra_listen: keep the dwell time to get af response frame.
 211  */
 212 struct brcmf_config_af_params {
 213         s32 mpc_onoff;
 214         bool search_channel;
 215         bool extra_listen;
 216 };
 217
 218 /**
 219  * brcmf_p2p_is_pub_action() - true if p2p public type frame.
 220  *
 221  * @frame: action frame data.
 222  * @frame_len: length of action frame data.
 223  *
 224  * Determine if action frame is p2p public action type
 225  */
 226 static bool brcmf_p2p_is_pub_action(void *frame, u32 frame_len)
 227 {
 228         struct brcmf_p2p_pub_act_frame *pact_frm;
 229
 230         if (frame == NULL)
 231                 return false;
 232
 233         pact_frm = (struct brcmf_p2p_pub_act_frame *)frame;
 234         if (frame_len < sizeof(struct brcmf_p2p_pub_act_frame) - 1)
 235                 return false;
 236
 237         if (pact_frm->category == P2P_PUB_AF_CATEGORY &&
 238             pact_frm->action == P2P_PUB_AF_ACTION &&
 239             pact_frm->oui_type == P2P_VER &&
 240             memcmp(pact_frm->oui, P2P_OUI, P2P_OUI_LEN) == 0)
 241                 return true;
 242
 243         return false;
 244 }
 245
 246 /**
 247  * brcmf_p2p_is_p2p_action() - true if p2p action type frame.
 248  *
 249  * @frame: action frame data.
 250  * @frame_len: length of action frame data.
 251  *
 252  * Determine if action frame is p2p action type
 253  */
 254 static bool brcmf_p2p_is_p2p_action(void *frame, u32 frame_len)
 255 {
 256         struct brcmf_p2p_action_frame *act_frm;
 257
 258         if (frame == NULL)
 259                 return false;
 260
 261         act_frm = (struct brcmf_p2p_action_frame *)frame;
 262         if (frame_len < sizeof(struct brcmf_p2p_action_frame) - 1)
 263                 return false;
 264
 265         if (act_frm->category == P2P_AF_CATEGORY &&
 266             act_frm->type  == P2P_VER &&
 267             memcmp(act_frm->oui, P2P_OUI, P2P_OUI_LEN) == 0)
 268                 return true;
 269
 270         return false;
 271 }
 272
 273 /**
 274  * brcmf_p2p_is_gas_action() - true if p2p gas action type frame.
 275  *
 276  * @frame: action frame data.
 277  * @frame_len: length of action frame data.
 278  *
 279  * Determine if action frame is p2p gas action type
 280  */
 281 static bool brcmf_p2p_is_gas_action(void *frame, u32 frame_len)
 282 {
 283         struct brcmf_p2psd_gas_pub_act_frame *sd_act_frm;
 284
 285         if (frame == NULL)
 286                 return false;
 287
 288         sd_act_frm = (struct brcmf_p2psd_gas_pub_act_frame *)frame;
 289         if (frame_len < sizeof(struct brcmf_p2psd_gas_pub_act_frame) - 1)
 290                 return false;
 291
 292         if (sd_act_frm->category != P2PSD_ACTION_CATEGORY)
 293                 return false;
 294
 295         if (sd_act_frm->action == P2PSD_ACTION_ID_GAS_IREQ ||
 296             sd_act_frm->action == P2PSD_ACTION_ID_GAS_IRESP ||
 297             sd_act_frm->action == P2PSD_ACTION_ID_GAS_CREQ ||
 298             sd_act_frm->action == P2PSD_ACTION_ID_GAS_CRESP)
 299                 return true;
 300
 301         return false;
 302 }
 303
 304 /**
 305  * brcmf_p2p_print_actframe() - debug print routine.
 306  *
 307  * @tx: Received or to be transmitted
 308  * @frame: action frame data.
 309  * @frame_len: length of action frame data.
 310  *
 311  * Print information about the p2p action frame
 312  */
 313
 314 #ifdef DEBUG
 315
 316 static void brcmf_p2p_print_actframe(bool tx, void *frame, u32 frame_len)
 317 {
 318         struct brcmf_p2p_pub_act_frame *pact_frm;
 319         struct brcmf_p2p_action_frame *act_frm;
 320         struct brcmf_p2psd_gas_pub_act_frame *sd_act_frm;
 321
 322         if (!frame || frame_len <= 2)
 323                 return;
 324
 325         if (brcmf_p2p_is_pub_action(frame, frame_len)) {
 326                 pact_frm = (struct brcmf_p2p_pub_act_frame *)frame;
 327                 switch (pact_frm->subtype) {
 328                 case P2P_PAF_GON_REQ:
 329                         brcmf_dbg(TRACE, "%s P2P Group Owner Negotiation Req Frame\n",
 330                                   (tx) ? "TX" : "RX");
 331                         break;
 332                 case P2P_PAF_GON_RSP:
 333                         brcmf_dbg(TRACE, "%s P2P Group Owner Negotiation Rsp Frame\n",
 334                                   (tx) ? "TX" : "RX");
 335                         break;
 336                 case P2P_PAF_GON_CONF:
 337                         brcmf_dbg(TRACE, "%s P2P Group Owner Negotiation Confirm Frame\n",
 338                                   (tx) ? "TX" : "RX");
 339                         break;
 340                 case P2P_PAF_INVITE_REQ:
 341                         brcmf_dbg(TRACE, "%s P2P Invitation Request  Frame\n",
 342                                   (tx) ? "TX" : "RX");
 343                         break;
 344                 case P2P_PAF_INVITE_RSP:
 345                         brcmf_dbg(TRACE, "%s P2P Invitation Response Frame\n",
 346                                   (tx) ? "TX" : "RX");
 347                         break;
 348                 case P2P_PAF_DEVDIS_REQ:
 349                         brcmf_dbg(TRACE, "%s P2P Device Discoverability Request Frame\n",
 350                                   (tx) ? "TX" : "RX");
 351                         break;
 352                 case P2P_PAF_DEVDIS_RSP:
 353                         brcmf_dbg(TRACE, "%s P2P Device Discoverability Response Frame\n",
 354                                   (tx) ? "TX" : "RX");
 355                         break;
 356                 case P2P_PAF_PROVDIS_REQ:
 357                         brcmf_dbg(TRACE, "%s P2P Provision Discovery Request Frame\n",
 358                                   (tx) ? "TX" : "RX");
 359                         break;
 360                 case P2P_PAF_PROVDIS_RSP:
 361                         brcmf_dbg(TRACE, "%s P2P Provision Discovery Response Frame\n",
 362                                   (tx) ? "TX" : "RX");
 363                         break;
 364                 default:
 365                         brcmf_dbg(TRACE, "%s Unknown P2P Public Action Frame\n",
 366                                   (tx) ? "TX" : "RX");
 367                         break;
 368                 }
 369         } else if (brcmf_p2p_is_p2p_action(frame, frame_len)) {
 370                 act_frm = (struct brcmf_p2p_action_frame *)frame;
 371                 switch (act_frm->subtype) {
 372                 case P2P_AF_NOTICE_OF_ABSENCE:
 373                         brcmf_dbg(TRACE, "%s P2P Notice of Absence Frame\n",
 374                                   (tx) ? "TX" : "RX");
 375                         break;
 376                 case P2P_AF_PRESENCE_REQ:
 377                         brcmf_dbg(TRACE, "%s P2P Presence Request Frame\n",
 378                                   (tx) ? "TX" : "RX");
 379                         break;
 380                 case P2P_AF_PRESENCE_RSP:
 381                         brcmf_dbg(TRACE, "%s P2P Presence Response Frame\n",
 382                                   (tx) ? "TX" : "RX");
 383                         break;
 384                 case P2P_AF_GO_DISC_REQ:
 385                         brcmf_dbg(TRACE, "%s P2P Discoverability Request Frame\n",
 386                                   (tx) ? "TX" : "RX");
 387                         break;
 388                 default:
 389                         brcmf_dbg(TRACE, "%s Unknown P2P Action Frame\n",
 390                                   (tx) ? "TX" : "RX");
 391                 }
 392
 393         } else if (brcmf_p2p_is_gas_action(frame, frame_len)) {
 394                 sd_act_frm = (struct brcmf_p2psd_gas_pub_act_frame *)frame;
 395                 switch (sd_act_frm->action) {
 396                 case P2PSD_ACTION_ID_GAS_IREQ:
 397                         brcmf_dbg(TRACE, "%s P2P GAS Initial Request\n",
 398                                   (tx) ? "TX" : "RX");
 399                         break;
 400                 case P2PSD_ACTION_ID_GAS_IRESP:
 401                         brcmf_dbg(TRACE, "%s P2P GAS Initial Response\n",
 402                                   (tx) ? "TX" : "RX");
 403                         break;
 404                 case P2PSD_ACTION_ID_GAS_CREQ:
 405                         brcmf_dbg(TRACE, "%s P2P GAS Comback Request\n",
 406                                   (tx) ? "TX" : "RX");
 407                         break;
 408                 case P2PSD_ACTION_ID_GAS_CRESP:
 409                         brcmf_dbg(TRACE, "%s P2P GAS Comback Response\n",
 410                                   (tx) ? "TX" : "RX");
 411                         break;
 412                 default:
 413                         brcmf_dbg(TRACE, "%s Unknown P2P GAS Frame\n",
 414                                   (tx) ? "TX" : "RX");
 415                         break;
 416                 }
 417         }
 418 }
 419
 420 #else
 421
 422 static void brcmf_p2p_print_actframe(bool tx, void *frame, u32 frame_len)
 423 {
 424 }
 425
 426 #endif
 427
 428
 429 /**
 430  * brcmf_p2p_set_firmware() - prepare firmware for peer-to-peer operation.
 431  *
 432  * @ifp: ifp to use for iovars (primary).
 433  * @p2p_mac: mac address to configure for p2p_da_override
 434  */
 435 static int brcmf_p2p_set_firmware(struct brcmf_if *ifp, u8 *p2p_mac)
 436 {
 437         s32 ret = 0;
 438
 439         brcmf_fil_cmd_int_set(ifp, BRCMF_C_DOWN, 1);
 440         brcmf_fil_iovar_int_set(ifp, "apsta", 1);
 441         brcmf_fil_cmd_int_set(ifp, BRCMF_C_UP, 1);
 442
 443         /* In case of COB type, firmware has default mac address
 444          * After Initializing firmware, we have to set current mac address to
 445          * firmware for P2P device address. This must be done with discovery
 446          * disabled.
 447          */
 448         brcmf_fil_iovar_int_set(ifp, "p2p_disc", 0);
 449
 450         ret = brcmf_fil_iovar_data_set(ifp, "p2p_da_override", p2p_mac,
 451                                        ETH_ALEN);
 452         if (ret)
 453                 brcmf_err("failed to update device address ret %d\n", ret);
 454
 455         return ret;
 456 }
 457
 458 /**
 459  * brcmf_p2p_generate_bss_mac() - derive mac addresses for P2P.
 460  *
 461  * @p2p: P2P specific data.
 462  * @dev_addr: optional device address.
 463  *
 464  * P2P needs mac addresses for P2P device and interface. If no device
 465  * address it specified, these are derived from a random ethernet
 466  * address.
 467  */
 468 static void brcmf_p2p_generate_bss_mac(struct brcmf_p2p_info *p2p, u8 *dev_addr)
 469 {
 470         bool random_addr = false;
 471
 472         if (!dev_addr || is_zero_ether_addr(dev_addr))
 473                 random_addr = true;
 474
 475         /* Generate the P2P Device Address obtaining a random ethernet
 476          * address with the locally administered bit set.
 477          */
 478         if (random_addr)
 479                 eth_random_addr(p2p->dev_addr);
 480         else
 481                 memcpy(p2p->dev_addr, dev_addr, ETH_ALEN);
 482
 483         /* Generate the P2P Interface Address.  If the discovery and connection
 484          * BSSCFGs need to simultaneously co-exist, then this address must be
 485          * different from the P2P Device Address, but also locally administered.
 486          */
 487         memcpy(p2p->int_addr, p2p->dev_addr, ETH_ALEN);
 488         p2p->int_addr[0] |= 0x02;
 489         p2p->int_addr[4] ^= 0x80;
 490 }
 491
 492 /**
 493  * brcmf_p2p_scan_is_p2p_request() - is cfg80211 scan request a P2P scan.
 494  *
 495  * @request: the scan request as received from cfg80211.
 496  *
 497  * returns true if one of the ssids in the request matches the
 498  * P2P wildcard ssid; otherwise returns false.
 499  */
 500 static bool brcmf_p2p_scan_is_p2p_request(struct cfg80211_scan_request *request)
 501 {
 502         struct cfg80211_ssid *ssids = request->ssids;
 503         int i;
 504
 505         for (i = 0; i < request->n_ssids; i++) {
 506                 if (ssids[i].ssid_len != BRCMF_P2P_WILDCARD_SSID_LEN)
 507                         continue;
 508
 509                 brcmf_dbg(INFO, "comparing ssid \"%s\"", ssids[i].ssid);
 510                 if (!memcmp(BRCMF_P2P_WILDCARD_SSID, ssids[i].ssid,
 511                             BRCMF_P2P_WILDCARD_SSID_LEN))
 512                         return true;
 513         }
 514         return false;
 515 }
 516
 517 /**
 518  * brcmf_p2p_set_discover_state - set discover state in firmware.
 519  *
 520  * @ifp: low-level interface object.
 521  * @state: discover state to set.
 522  * @chanspec: channel parameters (for state @WL_P2P_DISC_ST_LISTEN only).
 523  * @listen_ms: duration to listen (for state @WL_P2P_DISC_ST_LISTEN only).
 524  */
 525 static s32 brcmf_p2p_set_discover_state(struct brcmf_if *ifp, u8 state,
 526                                         u16 chanspec, u16 listen_ms)
 527 {
 528         struct brcmf_p2p_disc_st_le discover_state;
 529         s32 ret = 0;
 530         brcmf_dbg(TRACE, "enter\n");
 531
 532         discover_state.state = state;
 533         discover_state.chspec = cpu_to_le16(chanspec);
 534         discover_state.dwell = cpu_to_le16(listen_ms);
 535         ret = brcmf_fil_bsscfg_data_set(ifp, "p2p_state", &discover_state,
 536                                         sizeof(discover_state));
 537         return ret;
 538 }
 539
 540 /**
 541  * brcmf_p2p_deinit_discovery() - disable P2P device discovery.
 542  *
 543  * @p2p: P2P specific data.
 544  *
 545  * Resets the discovery state and disables it in firmware.
 546  */
 547 static s32 brcmf_p2p_deinit_discovery(struct brcmf_p2p_info *p2p)
 548 {
 549         struct brcmf_cfg80211_vif *vif;
 550
 551         brcmf_dbg(TRACE, "enter\n");
 552
 553         /* Set the discovery state to SCAN */
 554         vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif;
 555         (void)brcmf_p2p_set_discover_state(vif->ifp, WL_P2P_DISC_ST_SCAN, 0, 0);
 556
 557         /* Disable P2P discovery in the firmware */
 558         vif = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif;
 559         (void)brcmf_fil_iovar_int_set(vif->ifp, "p2p_disc", 0);
 560
 561         return 0;
 562 }
 563
 564 /**
 565  * brcmf_p2p_enable_discovery() - initialize and configure discovery.
 566  *
 567  * @p2p: P2P specific data.
 568  *
 569  * Initializes the discovery device and configure the virtual interface.
 570  */
 571 static int brcmf_p2p_enable_discovery(struct brcmf_p2p_info *p2p)
 572 {
 573         struct brcmf_cfg80211_vif *vif;
 574         s32 ret = 0;
 575
 576         brcmf_dbg(TRACE, "enter\n");
 577         vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif;
 578         if (!vif) {
 579                 brcmf_err("P2P config device not available\n");
 580                 ret = -EPERM;
 581                 goto exit;
 582         }
 583
 584         if (test_bit(BRCMF_P2P_STATUS_ENABLED, &p2p->status)) {
 585                 brcmf_dbg(INFO, "P2P config device already configured\n");
 586                 goto exit;
 587         }
 588
 589         /* Re-initialize P2P Discovery in the firmware */
 590         vif = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif;
 591         ret = brcmf_fil_iovar_int_set(vif->ifp, "p2p_disc", 1);
 592         if (ret < 0) {
 593                 brcmf_err("set p2p_disc error\n");
 594                 goto exit;
 595         }
 596         vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif;
 597         ret = brcmf_p2p_set_discover_state(vif->ifp, WL_P2P_DISC_ST_SCAN, 0, 0);
 598         if (ret < 0) {
 599                 brcmf_err("unable to set WL_P2P_DISC_ST_SCAN\n");
 600                 goto exit;
 601         }
 602
 603         /*
 604          * Set wsec to any non-zero value in the discovery bsscfg
 605          * to ensure our P2P probe responses have the privacy bit
 606          * set in the 802.11 WPA IE. Some peer devices may not
 607          * initiate WPS with us if this bit is not set.
 608          */
 609         ret = brcmf_fil_bsscfg_int_set(vif->ifp, "wsec", AES_ENABLED);
 610         if (ret < 0) {
 611                 brcmf_err("wsec error %d\n", ret);
 612                 goto exit;
 613         }
 614
 615         set_bit(BRCMF_P2P_STATUS_ENABLED, &p2p->status);
 616 exit:
 617         return ret;
 618 }
 619
 620 /**
 621  * brcmf_p2p_escan() - initiate a P2P scan.
 622  *
 623  * @p2p: P2P specific data.
 624  * @num_chans: number of channels to scan.
 625  * @chanspecs: channel parameters for @num_chans channels.
 626  * @search_state: P2P discover state to use.
 627  * @bss_type: type of P2P bss.
 628  */
 629 static s32 brcmf_p2p_escan(struct brcmf_p2p_info *p2p, u32 num_chans,
 630                            u16 chanspecs[], s32 search_state,
 631                            enum p2p_bss_type bss_type)
 632 {
 633         s32 ret = 0;
 634         s32 memsize = offsetof(struct brcmf_p2p_scan_le,
 635                                eparams.params_le.channel_list);
 636         s32 nprobes;
 637         s32 active;
 638         u32 i;
 639         u8 *memblk;
 640         struct brcmf_cfg80211_vif *vif;
 641         struct brcmf_p2p_scan_le *p2p_params;
 642         struct brcmf_scan_params_le *sparams;
 643
 644         memsize += num_chans * sizeof(__le16);
 645         memblk = kzalloc(memsize, GFP_KERNEL);
 646         if (!memblk)
 647                 return -ENOMEM;
 648
 649         vif = p2p->bss_idx[bss_type].vif;
 650         if (vif == NULL) {
 651                 brcmf_err("no vif for bss type %d\n", bss_type);
 652                 ret = -EINVAL;
 653                 goto exit;
 654         }
 655         p2p_params = (struct brcmf_p2p_scan_le *)memblk;
 656         sparams = &p2p_params->eparams.params_le;
 657
 658         switch (search_state) {
 659         case WL_P2P_DISC_ST_SEARCH:
 660                 /*
 661                  * If we in SEARCH STATE, we don't need to set SSID explictly
 662                  * because dongle use P2P WILDCARD internally by default, use
 663                  * null ssid, which it is already due to kzalloc.
 664                  */
 665                 break;
 666         case WL_P2P_DISC_ST_SCAN:
 667                 /*
 668                  * wpa_supplicant has p2p_find command with type social or
 669                  * progressive. For progressive, we need to set the ssid to
 670                  * P2P WILDCARD because we just do broadcast scan unless
 671                  * setting SSID.
 672                  */
 673                 sparams->ssid_le.SSID_len =
 674                                 cpu_to_le32(BRCMF_P2P_WILDCARD_SSID_LEN);
 675                 memcpy(sparams->ssid_le.SSID, BRCMF_P2P_WILDCARD_SSID,
 676                        BRCMF_P2P_WILDCARD_SSID_LEN);
 677                 break;
 678         default:
 679                 brcmf_err(" invalid search state %d\n", search_state);
 680                 ret = -EINVAL;
 681                 goto exit;
 682         }
 683
 684         brcmf_p2p_set_discover_state(vif->ifp, search_state, 0, 0);
 685
 686         /*
 687          * set p2p scan parameters.
 688          */
 689         p2p_params->type = 'E';
 690
 691         /* determine the scan engine parameters */
 692         sparams->bss_type = DOT11_BSSTYPE_ANY;
 693         if (p2p->cfg->active_scan)
 694                 sparams->scan_type = 0;
 695         else
 696                 sparams->scan_type = 1;
 697
 698         eth_broadcast_addr(sparams->bssid);
 699         sparams->home_time = cpu_to_le32(P2PAPI_SCAN_HOME_TIME_MS);
 700
 701         /*
 702          * SOCIAL_CHAN_CNT + 1 takes care of the Progressive scan
 703          * supported by the supplicant.
 704          */
 705         if (num_chans == SOCIAL_CHAN_CNT || num_chans == (SOCIAL_CHAN_CNT + 1))
 706                 active = P2PAPI_SCAN_SOCIAL_DWELL_TIME_MS;
 707         else if (num_chans == AF_PEER_SEARCH_CNT)
 708                 active = P2PAPI_SCAN_AF_SEARCH_DWELL_TIME_MS;
 709         else if (brcmf_get_vif_state_any(p2p->cfg, BRCMF_VIF_STATUS_CONNECTED))
 710                 active = -1;
 711         else
 712                 active = P2PAPI_SCAN_DWELL_TIME_MS;
 713
 714         /* Override scan params to find a peer for a connection */
 715         if (num_chans == 1) {
 716                 active = WL_SCAN_CONNECT_DWELL_TIME_MS;
 717                 /* WAR to sync with presence period of VSDB GO.
 718                  * send probe request more frequently
 719                  */
 720                 nprobes = active / WL_SCAN_JOIN_PROBE_INTERVAL_MS;
 721         } else {
 722                 nprobes = active / P2PAPI_SCAN_NPROBS_TIME_MS;
 723         }
 724
 725         if (nprobes <= 0)
 726                 nprobes = 1;
 727
 728         brcmf_dbg(INFO, "nprobes # %d, active_time %d\n", nprobes, active);
 729         sparams->active_time = cpu_to_le32(active);
 730         sparams->nprobes = cpu_to_le32(nprobes);
 731         sparams->passive_time = cpu_to_le32(-1);
 732         sparams->channel_num = cpu_to_le32(num_chans &
 733                                            BRCMF_SCAN_PARAMS_COUNT_MASK);
 734         for (i = 0; i < num_chans; i++)
 735                 sparams->channel_list[i] = cpu_to_le16(chanspecs[i]);
 736
 737         /* set the escan specific parameters */
 738         p2p_params->eparams.version = cpu_to_le32(BRCMF_ESCAN_REQ_VERSION);
 739         p2p_params->eparams.action =  cpu_to_le16(WL_ESCAN_ACTION_START);
 740         p2p_params->eparams.sync_id = cpu_to_le16(0x1234);
 741         /* perform p2p scan on primary device */
 742         ret = brcmf_fil_bsscfg_data_set(vif->ifp, "p2p_scan", memblk, memsize);
 743         if (!ret)
 744                 set_bit(BRCMF_SCAN_STATUS_BUSY, &p2p->cfg->scan_status);
 745 exit:
 746         kfree(memblk);
 747         return ret;
 748 }
 749
 750 /**
 751  * brcmf_p2p_run_escan() - escan callback for peer-to-peer.
 752  *
 753  * @cfg: driver private data for cfg80211 interface.
 754  * @ndev: net device for which scan is requested.
 755  * @request: scan request from cfg80211.
 756  * @action: scan action.
 757  *
 758  * Determines the P2P discovery state based to scan request parameters and
 759  * validates the channels in the request.
 760  */
 761 static s32 brcmf_p2p_run_escan(struct brcmf_cfg80211_info *cfg,
 762                                struct brcmf_if *ifp,
 763                                struct cfg80211_scan_request *request)
 764 {
 765         struct brcmf_p2p_info *p2p = &cfg->p2p;
 766         s32 err = 0;
 767         s32 search_state = WL_P2P_DISC_ST_SCAN;
 768         struct brcmf_cfg80211_vif *vif;
 769         struct net_device *dev = NULL;
 770         int i, num_nodfs = 0;
 771         u16 *chanspecs;
 772
 773         brcmf_dbg(TRACE, "enter\n");
 774
 775         if (!request) {
 776                 err = -EINVAL;
 777                 goto exit;
 778         }
 779
 780         if (request->n_channels) {
 781                 chanspecs = kcalloc(request->n_channels, sizeof(*chanspecs),
 782                                     GFP_KERNEL);
 783                 if (!chanspecs) {
 784                         err = -ENOMEM;
 785                         goto exit;
 786                 }
 787                 vif = p2p->bss_idx[P2PAPI_BSSCFG_CONNECTION].vif;
 788                 if (vif)
 789                         dev = vif->wdev.netdev;
 790                 if (request->n_channels == 3 &&
 791                     request->channels[0]->hw_value == SOCIAL_CHAN_1 &&
 792                     request->channels[1]->hw_value == SOCIAL_CHAN_2 &&
 793                     request->channels[2]->hw_value == SOCIAL_CHAN_3) {
 794                         /* SOCIAL CHANNELS 1, 6, 11 */
 795                         search_state = WL_P2P_DISC_ST_SEARCH;
 796                         brcmf_dbg(INFO, "P2P SEARCH PHASE START\n");
 797                 } else if (dev != NULL &&
 798                            vif->wdev.iftype == NL80211_IFTYPE_P2P_GO) {
 799                         /* If you are already a GO, then do SEARCH only */
 800                         brcmf_dbg(INFO, "Already a GO. Do SEARCH Only\n");
 801                         search_state = WL_P2P_DISC_ST_SEARCH;
 802                 } else {
 803                         brcmf_dbg(INFO, "P2P SCAN STATE START\n");
 804                 }
 805
 806                 /*
 807                  * no P2P scanning on passive or DFS channels.
 808                  */
 809                 for (i = 0; i < request->n_channels; i++) {
 810                         struct ieee80211_channel *chan = request->channels[i];
 811
 812                         if (chan->flags & (IEEE80211_CHAN_RADAR |
 813                                            IEEE80211_CHAN_NO_IR))
 814                                 continue;
 815
 816                         chanspecs[i] = channel_to_chanspec(&p2p->cfg->d11inf,
 817                                                            chan);
 818                         brcmf_dbg(INFO, "%d: chan=%d, channel spec=%x\n",
 819                                   num_nodfs, chan->hw_value, chanspecs[i]);
 820                         num_nodfs++;
 821                 }
 822                 err = brcmf_p2p_escan(p2p, num_nodfs, chanspecs, search_state,
 823                                       P2PAPI_BSSCFG_DEVICE);
 824                 kfree(chanspecs);
 825         }
 826 exit:
 827         if (err)
 828                 brcmf_err("error (%d)\n", err);
 829         return err;
 830 }
 831
 832
 833 /**
 834  * brcmf_p2p_find_listen_channel() - find listen channel in ie string.
 835  *
 836  * @ie: string of information elements.
 837  * @ie_len: length of string.
 838  *
 839  * Scan ie for p2p ie and look for attribute 6 channel. If available determine
 840  * channel and return it.
 841  */
 842 static s32 brcmf_p2p_find_listen_channel(const u8 *ie, u32 ie_len)
 843 {
 844         u8 channel_ie[5];
 845         s32 listen_channel;
 846         s32 err;
 847
 848         err = cfg80211_get_p2p_attr(ie, ie_len,
 849                                     IEEE80211_P2P_ATTR_LISTEN_CHANNEL,
 850                                     channel_ie, sizeof(channel_ie));
 851         if (err < 0)
 852                 return err;
 853
 854         /* listen channel subel length format:     */
 855         /* 3(country) + 1(op. class) + 1(chan num) */
 856         listen_channel = (s32)channel_ie[3 + 1];
 857
 858         if (listen_channel == SOCIAL_CHAN_1 ||
 859             listen_channel == SOCIAL_CHAN_2 ||
 860             listen_channel == SOCIAL_CHAN_3) {
 861                 brcmf_dbg(INFO, "Found my Listen Channel %d\n", listen_channel);
 862                 return listen_channel;
 863         }
 864
 865         return -EPERM;
 866 }
 867
 868
 869 /**
 870  * brcmf_p2p_scan_prep() - prepare scan based on request.
 871  *
 872  * @wiphy: wiphy device.
 873  * @request: scan request from cfg80211.
 874  * @vif: vif on which scan request is to be executed.
 875  *
 876  * Prepare the scan appropriately for type of scan requested. Overrides the
 877  * escan .run() callback for peer-to-peer scanning.
 878  */
 879 int brcmf_p2p_scan_prep(struct wiphy *wiphy,
 880                         struct cfg80211_scan_request *request,
 881                         struct brcmf_cfg80211_vif *vif)
 882 {
 883         struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
 884         struct brcmf_p2p_info *p2p = &cfg->p2p;
 885         int err = 0;
 886
 887         if (brcmf_p2p_scan_is_p2p_request(request)) {
 888                 /* find my listen channel */
 889                 err = brcmf_p2p_find_listen_channel(request->ie,
 890                                                     request->ie_len);
 891                 if (err < 0)
 892                         return err;
 893
 894                 p2p->afx_hdl.my_listen_chan = err;
 895
 896                 clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status);
 897                 brcmf_dbg(INFO, "P2P: GO_NEG_PHASE status cleared\n");
 898
 899                 err = brcmf_p2p_enable_discovery(p2p);
 900                 if (err)
 901                         return err;
 902
 903                 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif;
 904
 905                 /* override .run_escan() callback. */
 906                 cfg->escan_info.run = brcmf_p2p_run_escan;
 907         }
 908         err = brcmf_vif_set_mgmt_ie(vif, BRCMF_VNDR_IE_PRBREQ_FLAG,
 909                                     request->ie, request->ie_len);
 910         return err;
 911 }
 912
 913
 914 /**
 915  * brcmf_p2p_discover_listen() - set firmware to discover listen state.
 916  *
 917  * @p2p: p2p device.
 918  * @channel: channel nr for discover listen.
 919  * @duration: time in ms to stay on channel.
 920  *
 921  */
 922 static s32
 923 brcmf_p2p_discover_listen(struct brcmf_p2p_info *p2p, u16 channel, u32 duration)
 924 {
 925         struct brcmf_cfg80211_vif *vif;
 926         struct brcmu_chan ch;
 927         s32 err = 0;
 928
 929         vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif;
 930         if (!vif) {
 931                 brcmf_err("Discovery is not set, so we have nothing to do\n");
 932                 err = -EPERM;
 933                 goto exit;
 934         }
 935
 936         if (test_bit(BRCMF_P2P_STATUS_DISCOVER_LISTEN, &p2p->status)) {
 937                 brcmf_err("Previous LISTEN is not completed yet\n");
 938                 /* WAR: prevent cookie mismatch in wpa_supplicant return OK */
 939                 goto exit;
 940         }
 941
 942         ch.chnum = channel;
 943         ch.bw = BRCMU_CHAN_BW_20;
 944         p2p->cfg->d11inf.encchspec(&ch);
 945         err = brcmf_p2p_set_discover_state(vif->ifp, WL_P2P_DISC_ST_LISTEN,
 946                                            ch.chspec, (u16)duration);
 947         if (!err) {
 948                 set_bit(BRCMF_P2P_STATUS_DISCOVER_LISTEN, &p2p->status);
 949                 p2p->remain_on_channel_cookie++;
 950         }
 951 exit:
 952         return err;
 953 }
 954
 955
 956 /**
 957  * brcmf_p2p_remain_on_channel() - put device on channel and stay there.
 958  *
 959  * @wiphy: wiphy device.
 960  * @channel: channel to stay on.
 961  * @duration: time in ms to remain on channel.
 962  *
 963  */
 964 int brcmf_p2p_remain_on_channel(struct wiphy *wiphy, struct wireless_dev *wdev,
 965                                 struct ieee80211_channel *channel,
 966                                 unsigned int duration, u64 *cookie)
 967 {
 968         struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
 969         struct brcmf_p2p_info *p2p = &cfg->p2p;
 970         s32 err;
 971         u16 channel_nr;
 972
 973         channel_nr = ieee80211_frequency_to_channel(channel->center_freq);
 974         brcmf_dbg(TRACE, "Enter, channel: %d, duration ms (%d)\n", channel_nr,
 975                   duration);
 976
 977         err = brcmf_p2p_enable_discovery(p2p);
 978         if (err)
 979                 goto exit;
 980         err = brcmf_p2p_discover_listen(p2p, channel_nr, duration);
 981         if (err)
 982                 goto exit;
 983
 984         memcpy(&p2p->remain_on_channel, channel, sizeof(*channel));
 985         *cookie = p2p->remain_on_channel_cookie;
 986         cfg80211_ready_on_channel(wdev, *cookie, channel, duration, GFP_KERNEL);
 987
 988 exit:
 989         return err;
 990 }
 991
 992
 993 /**
 994  * brcmf_p2p_notify_listen_complete() - p2p listen has completed.
 995  *
 996  * @ifp: interfac control.
 997  * @e: event message. Not used, to make it usable for fweh event dispatcher.
 998  * @data: payload of message. Not used.
 999  *
1000  */
1001 int brcmf_p2p_notify_listen_complete(struct brcmf_if *ifp,
1002                                      const struct brcmf_event_msg *e,
1003                                      void *data)
1004 {
1005         struct brcmf_cfg80211_info *cfg = ifp->drvr->config;
1006         struct brcmf_p2p_info *p2p = &cfg->p2p;
1007
1008         brcmf_dbg(TRACE, "Enter\n");
1009         if (test_and_clear_bit(BRCMF_P2P_STATUS_DISCOVER_LISTEN,
1010                                &p2p->status)) {
1011                 if (test_and_clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_AF_LISTEN,
1012                                        &p2p->status)) {
1013                         clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME,
1014                                   &p2p->status);
1015                         brcmf_dbg(INFO, "Listen DONE, wake up wait_next_af\n");
1016                         complete(&p2p->wait_next_af);
1017                 }
1018
1019                 cfg80211_remain_on_channel_expired(&ifp->vif->wdev,
1020                                                    p2p->remain_on_channel_cookie,
1021                                                    &p2p->remain_on_channel,
1022                                                    GFP_KERNEL);
1023         }
1024         return 0;
1025 }
1026
1027
1028 /**
1029  * brcmf_p2p_cancel_remain_on_channel() - cancel p2p listen state.
1030  *
1031  * @ifp: interfac control.
1032  *
1033  */
1034 void brcmf_p2p_cancel_remain_on_channel(struct brcmf_if *ifp)
1035 {
1036         if (!ifp)
1037                 return;
1038         brcmf_p2p_set_discover_state(ifp, WL_P2P_DISC_ST_SCAN, 0, 0);
1039         brcmf_p2p_notify_listen_complete(ifp, NULL, NULL);
1040 }
1041
1042
1043 /**
1044  * brcmf_p2p_act_frm_search() - search function for action frame.
1045  *
1046  * @p2p: p2p device.
1047  * channel: channel on which action frame is to be trasmitted.
1048  *
1049  * search function to reach at common channel to send action frame. When
1050  * channel is 0 then all social channels will be used to send af
1051  */
1052 static s32 brcmf_p2p_act_frm_search(struct brcmf_p2p_info *p2p, u16 channel)
1053 {
1054         s32 err;
1055         u32 channel_cnt;
1056         u16 *default_chan_list;
1057         u32 i;
1058         struct brcmu_chan ch;
1059
1060         brcmf_dbg(TRACE, "Enter\n");
1061
1062         if (channel)
1063                 channel_cnt = AF_PEER_SEARCH_CNT;
1064         else
1065                 channel_cnt = SOCIAL_CHAN_CNT;
1066         default_chan_list = kzalloc(channel_cnt * sizeof(*default_chan_list),
1067                                     GFP_KERNEL);
1068         if (default_chan_list == NULL) {
1069                 brcmf_err("channel list allocation failed\n");
1070                 err = -ENOMEM;
1071                 goto exit;
1072         }
1073         ch.bw = BRCMU_CHAN_BW_20;
1074         if (channel) {
1075                 ch.chnum = channel;
1076                 p2p->cfg->d11inf.encchspec(&ch);
1077                 /* insert same channel to the chan_list */
1078                 for (i = 0; i < channel_cnt; i++)
1079                         default_chan_list[i] = ch.chspec;
1080         } else {
1081                 ch.chnum = SOCIAL_CHAN_1;
1082                 p2p->cfg->d11inf.encchspec(&ch);
1083                 default_chan_list[0] = ch.chspec;
1084                 ch.chnum = SOCIAL_CHAN_2;
1085                 p2p->cfg->d11inf.encchspec(&ch);
1086                 default_chan_list[1] = ch.chspec;
1087                 ch.chnum = SOCIAL_CHAN_3;
1088                 p2p->cfg->d11inf.encchspec(&ch);
1089                 default_chan_list[2] = ch.chspec;
1090         }
1091         err = brcmf_p2p_escan(p2p, channel_cnt, default_chan_list,
1092                               WL_P2P_DISC_ST_SEARCH, P2PAPI_BSSCFG_DEVICE);
1093         kfree(default_chan_list);
1094 exit:
1095         return err;
1096 }
1097
1098
1099 /**
1100  * brcmf_p2p_afx_handler() - afx worker thread.
1101  *
1102  * @work:
1103  *
1104  */
1105 static void brcmf_p2p_afx_handler(struct work_struct *work)
1106 {
1107         struct afx_hdl *afx_hdl = container_of(work, struct afx_hdl, afx_work);
1108         struct brcmf_p2p_info *p2p = container_of(afx_hdl,
1109                                                   struct brcmf_p2p_info,
1110                                                   afx_hdl);
1111         s32 err;
1112
1113         if (!afx_hdl->is_active)
1114                 return;
1115
1116         if (afx_hdl->is_listen && afx_hdl->my_listen_chan)
1117                 /* 100ms ~ 300ms */
1118                 err = brcmf_p2p_discover_listen(p2p, afx_hdl->my_listen_chan,
1119                                                 100 * (1 + prandom_u32() % 3));
1120         else
1121                 err = brcmf_p2p_act_frm_search(p2p, afx_hdl->peer_listen_chan);
1122
1123         if (err) {
1124                 brcmf_err("ERROR occurred! value is (%d)\n", err);
1125                 if (test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL,
1126                              &p2p->status))
1127                         complete(&afx_hdl->act_frm_scan);
1128         }
1129 }
1130
1131
1132 /**
1133  * brcmf_p2p_af_searching_channel() - search channel.
1134  *
1135  * @p2p: p2p device info struct.
1136  *
1137  */
1138 static s32 brcmf_p2p_af_searching_channel(struct brcmf_p2p_info *p2p)
1139 {
1140         struct afx_hdl *afx_hdl = &p2p->afx_hdl;
1141         struct brcmf_cfg80211_vif *pri_vif;
1142         s32 retry;
1143
1144         brcmf_dbg(TRACE, "Enter\n");
1145
1146         pri_vif = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif;
1147
1148         reinit_completion(&afx_hdl->act_frm_scan);
1149         set_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status);
1150         afx_hdl->is_active = true;
1151         afx_hdl->peer_chan = P2P_INVALID_CHANNEL;
1152
1153         /* Loop to wait until we find a peer's channel or the
1154          * pending action frame tx is cancelled.
1155          */
1156         retry = 0;
1157         while ((retry < P2P_CHANNEL_SYNC_RETRY) &&
1158                (afx_hdl->peer_chan == P2P_INVALID_CHANNEL)) {
1159                 afx_hdl->is_listen = false;
1160                 brcmf_dbg(TRACE, "Scheduling action frame for sending.. (%d)\n",
1161                           retry);
1162                 /* search peer on peer's listen channel */
1163                 schedule_work(&afx_hdl->afx_work);
1164                 wait_for_completion_timeout(&afx_hdl->act_frm_scan,
1165                                             P2P_AF_FRM_SCAN_MAX_WAIT);
1166                 if ((afx_hdl->peer_chan != P2P_INVALID_CHANNEL) ||
1167                     (!test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL,
1168                                &p2p->status)))
1169                         break;
1170
1171                 if (afx_hdl->my_listen_chan) {
1172                         brcmf_dbg(TRACE, "Scheduling listen peer, channel=%d\n",
1173                                   afx_hdl->my_listen_chan);
1174                         /* listen on my listen channel */
1175                         afx_hdl->is_listen = true;
1176                         schedule_work(&afx_hdl->afx_work);
1177                         wait_for_completion_timeout(&afx_hdl->act_frm_scan,
1178                                                     P2P_AF_FRM_SCAN_MAX_WAIT);
1179                 }
1180                 if ((afx_hdl->peer_chan != P2P_INVALID_CHANNEL) ||
1181                     (!test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL,
1182                                &p2p->status)))
1183                         break;
1184                 retry++;
1185
1186                 /* if sta is connected or connecting, sleep for a while before
1187                  * retry af tx or finding a peer
1188                  */
1189                 if (test_bit(BRCMF_VIF_STATUS_CONNECTED, &pri_vif->sme_state) ||
1190                     test_bit(BRCMF_VIF_STATUS_CONNECTING, &pri_vif->sme_state))
1191                         msleep(P2P_DEFAULT_SLEEP_TIME_VSDB);
1192         }
1193
1194         brcmf_dbg(TRACE, "Completed search/listen peer_chan=%d\n",
1195                   afx_hdl->peer_chan);
1196         afx_hdl->is_active = false;
1197
1198         clear_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status);
1199
1200         return afx_hdl->peer_chan;
1201 }
1202
1203
1204 /**
1205  * brcmf_p2p_scan_finding_common_channel() - was escan used for finding channel
1206  *
1207  * @cfg: common configuration struct.
1208  * @bi: bss info struct, result from scan.
1209  *
1210  */
1211 bool brcmf_p2p_scan_finding_common_channel(struct brcmf_cfg80211_info *cfg,
1212                                            struct brcmf_bss_info_le *bi)
1213
1214 {
1215         struct brcmf_p2p_info *p2p = &cfg->p2p;
1216         struct afx_hdl *afx_hdl = &p2p->afx_hdl;
1217         struct brcmu_chan ch;
1218         u8 *ie;
1219         s32 err;
1220         u8 p2p_dev_addr[ETH_ALEN];
1221
1222         if (!test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status))
1223                 return false;
1224
1225         if (bi == NULL) {
1226                 brcmf_dbg(TRACE, "ACTION FRAME SCAN Done\n");
1227                 if (afx_hdl->peer_chan == P2P_INVALID_CHANNEL)
1228                         complete(&afx_hdl->act_frm_scan);
1229                 return true;
1230         }
1231
1232         ie = ((u8 *)bi) + le16_to_cpu(bi->ie_offset);
1233         memset(p2p_dev_addr, 0, sizeof(p2p_dev_addr));
1234         err = cfg80211_get_p2p_attr(ie, le32_to_cpu(bi->ie_length),
1235                                     IEEE80211_P2P_ATTR_DEVICE_INFO,
1236                                     p2p_dev_addr, sizeof(p2p_dev_addr));
1237         if (err < 0)
1238                 err = cfg80211_get_p2p_attr(ie, le32_to_cpu(bi->ie_length),
1239                                             IEEE80211_P2P_ATTR_DEVICE_ID,
1240                                             p2p_dev_addr, sizeof(p2p_dev_addr));
1241         if ((err >= 0) &&
1242             (ether_addr_equal(p2p_dev_addr, afx_hdl->tx_dst_addr))) {
1243                 if (!bi->ctl_ch) {
1244                         ch.chspec = le16_to_cpu(bi->chanspec);
1245                         cfg->d11inf.decchspec(&ch);
1246                         bi->ctl_ch = ch.control_ch_num;
1247                 }
1248                 afx_hdl->peer_chan = bi->ctl_ch;
1249                 brcmf_dbg(TRACE, "ACTION FRAME SCAN : Peer %pM found, channel : %d\n",
1250                           afx_hdl->tx_dst_addr, afx_hdl->peer_chan);
1251                 complete(&afx_hdl->act_frm_scan);
1252         }
1253         return true;
1254 }
1255
1256 /**
1257  * brcmf_p2p_stop_wait_next_action_frame() - finish scan if af tx complete.
1258  *
1259  * @cfg: common configuration struct.
1260  *
1261  */
1262 static void
1263 brcmf_p2p_stop_wait_next_action_frame(struct brcmf_cfg80211_info *cfg)
1264 {
1265         struct brcmf_p2p_info *p2p = &cfg->p2p;
1266         struct brcmf_if *ifp = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->ifp;
1267
1268         if (test_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status) &&
1269             (test_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status) ||
1270              test_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status))) {
1271                 brcmf_dbg(TRACE, "*** Wake UP ** abort actframe iovar\n");
1272                 /* if channel is not zero, "actfame" uses off channel scan.
1273                  * So abort scan for off channel completion.
1274                  */
1275                 if (p2p->af_sent_channel)
1276                         brcmf_notify_escan_complete(cfg, ifp, true, true);
1277         } else if (test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_AF_LISTEN,
1278                             &p2p->status)) {
1279                 brcmf_dbg(TRACE, "*** Wake UP ** abort listen for next af frame\n");
1280                 /* So abort scan to cancel listen */
1281                 brcmf_notify_escan_complete(cfg, ifp, true, true);
1282         }
1283 }
1284
1285
1286 /**
1287  * brcmf_p2p_gon_req_collision() - Check if go negotiaton collission
1288  *
1289  * @p2p: p2p device info struct.
1290  *
1291  * return true if recevied action frame is to be dropped.
1292  */
1293 static bool
1294 brcmf_p2p_gon_req_collision(struct brcmf_p2p_info *p2p, u8 *mac)
1295 {
1296         struct brcmf_cfg80211_info *cfg = p2p->cfg;
1297         struct brcmf_if *ifp;
1298
1299         brcmf_dbg(TRACE, "Enter\n");
1300
1301         if (!test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status) ||
1302             !p2p->gon_req_action)
1303                 return false;
1304
1305         brcmf_dbg(TRACE, "GO Negotiation Request COLLISION !!!\n");
1306         /* if sa(peer) addr is less than da(my) addr, then this device
1307          * process peer's gon request and block to send gon req.
1308          * if not (sa addr > da addr),
1309          * this device will process gon request and drop gon req of peer.
1310          */
1311         ifp = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif->ifp;
1312         if (memcmp(mac, ifp->mac_addr, ETH_ALEN) < 0) {
1313                 brcmf_dbg(INFO, "Block transmit gon req !!!\n");
1314                 p2p->block_gon_req_tx = true;
1315                 /* if we are finding a common channel for sending af,
1316                  * do not scan more to block to send current gon req
1317                  */
1318                 if (test_and_clear_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL,
1319                                        &p2p->status))
1320                         complete(&p2p->afx_hdl.act_frm_scan);
1321                 if (test_and_clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME,
1322                                        &p2p->status))
1323                         brcmf_p2p_stop_wait_next_action_frame(cfg);
1324                 return false;
1325         }
1326
1327         /* drop gon request of peer to process gon request by this device. */
1328         brcmf_dbg(INFO, "Drop received gon req !!!\n");
1329
1330         return true;
1331 }
1332
1333
1334 /**
1335  * brcmf_p2p_notify_action_frame_rx() - received action frame.
1336  *
1337  * @ifp: interfac control.
1338  * @e: event message. Not used, to make it usable for fweh event dispatcher.
1339  * @data: payload of message, containing action frame data.
1340  *
1341  */
1342 int brcmf_p2p_notify_action_frame_rx(struct brcmf_if *ifp,
1343                                      const struct brcmf_event_msg *e,
1344                                      void *data)
1345 {
1346         struct brcmf_cfg80211_info *cfg = ifp->drvr->config;
1347         struct brcmf_p2p_info *p2p = &cfg->p2p;
1348         struct afx_hdl *afx_hdl = &p2p->afx_hdl;
1349         struct wireless_dev *wdev;
1350         u32 mgmt_frame_len = e->datalen - sizeof(struct brcmf_rx_mgmt_data);
1351         struct brcmf_rx_mgmt_data *rxframe = (struct brcmf_rx_mgmt_data *)data;
1352         u8 *frame = (u8 *)(rxframe + 1);
1353         struct brcmf_p2p_pub_act_frame *act_frm;
1354         struct brcmf_p2psd_gas_pub_act_frame *sd_act_frm;
1355         struct brcmu_chan ch;
1356         struct ieee80211_mgmt *mgmt_frame;
1357         s32 freq;
1358         u16 mgmt_type;
1359         u8 action;
1360
1361         if (e->datalen < sizeof(*rxframe)) {
1362                 brcmf_dbg(SCAN, "Event data to small. Ignore\n");
1363                 return 0;
1364         }
1365
1366         ch.chspec = be16_to_cpu(rxframe->chanspec);
1367         cfg->d11inf.decchspec(&ch);
1368         /* Check if wpa_supplicant has registered for this frame */
1369         brcmf_dbg(INFO, "ifp->vif->mgmt_rx_reg %04x\n", ifp->vif->mgmt_rx_reg);
1370         mgmt_type = (IEEE80211_STYPE_ACTION & IEEE80211_FCTL_STYPE) >> 4;
1371         if ((ifp->vif->mgmt_rx_reg & BIT(mgmt_type)) == 0)
1372                 return 0;
1373
1374         brcmf_p2p_print_actframe(false, frame, mgmt_frame_len);
1375
1376         action = P2P_PAF_SUBTYPE_INVALID;
1377         if (brcmf_p2p_is_pub_action(frame, mgmt_frame_len)) {
1378                 act_frm = (struct brcmf_p2p_pub_act_frame *)frame;
1379                 action = act_frm->subtype;
1380                 if ((action == P2P_PAF_GON_REQ) &&
1381                     (brcmf_p2p_gon_req_collision(p2p, (u8 *)e->addr))) {
1382                         if (test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL,
1383                                      &p2p->status) &&
1384                             (ether_addr_equal(afx_hdl->tx_dst_addr, e->addr))) {
1385                                 afx_hdl->peer_chan = ch.control_ch_num;
1386                                 brcmf_dbg(INFO, "GON request: Peer found, channel=%d\n",
1387                                           afx_hdl->peer_chan);
1388                                 complete(&afx_hdl->act_frm_scan);
1389                         }
1390                         return 0;
1391                 }
1392                 /* After complete GO Negotiation, roll back to mpc mode */
1393                 if ((action == P2P_PAF_GON_CONF) ||
1394                     (action == P2P_PAF_PROVDIS_RSP))
1395                         brcmf_set_mpc(ifp, 1);
1396                 if (action == P2P_PAF_GON_CONF) {
1397                         brcmf_dbg(TRACE, "P2P: GO_NEG_PHASE status cleared\n");
1398                         clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status);
1399                 }
1400         } else if (brcmf_p2p_is_gas_action(frame, mgmt_frame_len)) {
1401                 sd_act_frm = (struct brcmf_p2psd_gas_pub_act_frame *)frame;
1402                 action = sd_act_frm->action;
1403         }
1404
1405         if (test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status) &&
1406             (p2p->next_af_subtype == action)) {
1407                 brcmf_dbg(TRACE, "We got a right next frame! (%d)\n", action);
1408                 clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME,
1409                           &p2p->status);
1410                 /* Stop waiting for next AF. */
1411                 brcmf_p2p_stop_wait_next_action_frame(cfg);
1412         }
1413
1414         mgmt_frame = kzalloc(offsetof(struct ieee80211_mgmt, u) +
1415                              mgmt_frame_len, GFP_KERNEL);
1416         if (!mgmt_frame) {
1417                 brcmf_err("No memory available for action frame\n");
1418                 return -ENOMEM;
1419         }
1420         memcpy(mgmt_frame->da, ifp->mac_addr, ETH_ALEN);
1421         brcmf_fil_cmd_data_get(ifp, BRCMF_C_GET_BSSID, mgmt_frame->bssid,
1422                                ETH_ALEN);
1423         memcpy(mgmt_frame->sa, e->addr, ETH_ALEN);
1424         mgmt_frame->frame_control = cpu_to_le16(IEEE80211_STYPE_ACTION);
1425         memcpy(&mgmt_frame->u, frame, mgmt_frame_len);
1426         mgmt_frame_len += offsetof(struct ieee80211_mgmt, u);
1427
1428         freq = ieee80211_channel_to_frequency(ch.control_ch_num,
1429                                               ch.band == BRCMU_CHAN_BAND_2G ?
1430                                               NL80211_BAND_2GHZ :
1431                                               NL80211_BAND_5GHZ);
1432
1433         wdev = &ifp->vif->wdev;
1434         cfg80211_rx_mgmt(wdev, freq, 0, (u8 *)mgmt_frame, mgmt_frame_len, 0);
1435
1436         kfree(mgmt_frame);
1437         return 0;
1438 }
1439
1440
1441 /**
1442  * brcmf_p2p_notify_action_tx_complete() - transmit action frame complete
1443  *
1444  * @ifp: interfac control.
1445  * @e: event message. Not used, to make it usable for fweh event dispatcher.
1446  * @data: not used.
1447  *
1448  */
1449 int brcmf_p2p_notify_action_tx_complete(struct brcmf_if *ifp,
1450                                         const struct brcmf_event_msg *e,
1451                                         void *data)
1452 {
1453         struct brcmf_cfg80211_info *cfg = ifp->drvr->config;
1454         struct brcmf_p2p_info *p2p = &cfg->p2p;
1455
1456         brcmf_dbg(INFO, "Enter: event %s, status=%d\n",
1457                   e->event_code == BRCMF_E_ACTION_FRAME_OFF_CHAN_COMPLETE ?
1458                   "ACTION_FRAME_OFF_CHAN_COMPLETE" : "ACTION_FRAME_COMPLETE",
1459                   e->status);
1460
1461         if (!test_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status))
1462                 return 0;
1463
1464         if (e->event_code == BRCMF_E_ACTION_FRAME_COMPLETE) {
1465                 if (e->status == BRCMF_E_STATUS_SUCCESS) {
1466                         set_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED,
1467                                 &p2p->status);
1468                         if (!p2p->wait_for_offchan_complete)
1469                                 complete(&p2p->send_af_done);
1470                 } else {
1471                         set_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status);
1472                         /* If there is no ack, we don't need to wait for
1473                          * WLC_E_ACTION_FRAME_OFFCHAN_COMPLETE event
1474                          */
1475                         brcmf_p2p_stop_wait_next_action_frame(cfg);
1476                 }
1477
1478         } else {
1479                 complete(&p2p->send_af_done);
1480         }
1481         return 0;
1482 }
1483
1484
1485 /**
1486  * brcmf_p2p_tx_action_frame() - send action frame over fil.
1487  *
1488  * @p2p: p2p info struct for vif.
1489  * @af_params: action frame data/info.
1490  *
1491  * Send an action frame immediately without doing channel synchronization.
1492  *
1493  * This function waits for a completion event before returning.
1494  * The WLC_E_ACTION_FRAME_COMPLETE event will be received when the action
1495  * frame is transmitted.
1496  */
1497 static s32 brcmf_p2p_tx_action_frame(struct brcmf_p2p_info *p2p,
1498                                      struct brcmf_fil_af_params_le *af_params)
1499 {
1500         struct brcmf_cfg80211_vif *vif;
1501         s32 err = 0;
1502         s32 timeout = 0;
1503
1504         brcmf_dbg(TRACE, "Enter\n");
1505
1506         reinit_completion(&p2p->send_af_done);
1507         clear_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status);
1508         clear_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status);
1509
1510         vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif;
1511         err = brcmf_fil_bsscfg_data_set(vif->ifp, "actframe", af_params,
1512                                         sizeof(*af_params));
1513         if (err) {
1514                 brcmf_err(" sending action frame has failed\n");
1515                 goto exit;
1516         }
1517
1518         p2p->af_sent_channel = le32_to_cpu(af_params->channel);
1519         p2p->af_tx_sent_jiffies = jiffies;
1520
1521         if (test_bit(BRCMF_P2P_STATUS_DISCOVER_LISTEN, &p2p->status) &&
1522             p2p->af_sent_channel ==
1523             ieee80211_frequency_to_channel(p2p->remain_on_channel.center_freq))
1524                 p2p->wait_for_offchan_complete = false;
1525         else
1526                 p2p->wait_for_offchan_complete = true;
1527
1528         brcmf_dbg(TRACE, "Waiting for %s tx completion event\n",
1529                   (p2p->wait_for_offchan_complete) ?
1530                    "off-channel" : "on-channel");
1531
1532         timeout = wait_for_completion_timeout(&p2p->send_af_done,
1533                                               P2P_AF_MAX_WAIT_TIME);
1534
1535         if (test_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status)) {
1536                 brcmf_dbg(TRACE, "TX action frame operation is success\n");
1537         } else {
1538                 err = -EIO;
1539                 brcmf_dbg(TRACE, "TX action frame operation has failed\n");
1540         }
1541         /* clear status bit for action tx */
1542         clear_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status);
1543         clear_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status);
1544
1545 exit:
1546         return err;
1547 }
1548
1549
1550 /**
1551  * brcmf_p2p_pub_af_tx() - public action frame tx routine.
1552  *
1553  * @cfg: driver private data for cfg80211 interface.
1554  * @af_params: action frame data/info.
1555  * @config_af_params: configuration data for action frame.
1556  *
1557  * routine which transmits ation frame public type.
1558  */
1559 static s32 brcmf_p2p_pub_af_tx(struct brcmf_cfg80211_info *cfg,
1560                                struct brcmf_fil_af_params_le *af_params,
1561                                struct brcmf_config_af_params *config_af_params)
1562 {
1563         struct brcmf_p2p_info *p2p = &cfg->p2p;
1564         struct brcmf_fil_action_frame_le *action_frame;
1565         struct brcmf_p2p_pub_act_frame *act_frm;
1566         s32 err = 0;
1567         u16 ie_len;
1568
1569         action_frame = &af_params->action_frame;
1570         act_frm = (struct brcmf_p2p_pub_act_frame *)(action_frame->data);
1571
1572         config_af_params->extra_listen = true;
1573
1574         switch (act_frm->subtype) {
1575         case P2P_PAF_GON_REQ:
1576                 brcmf_dbg(TRACE, "P2P: GO_NEG_PHASE status set\n");
1577                 set_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status);
1578                 config_af_params->mpc_onoff = 0;
1579                 config_af_params->search_channel = true;
1580                 p2p->next_af_subtype = act_frm->subtype + 1;
1581                 p2p->gon_req_action = true;
1582                 /* increase dwell time to wait for RESP frame */
1583                 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME);
1584                 break;
1585         case P2P_PAF_GON_RSP:
1586                 p2p->next_af_subtype = act_frm->subtype + 1;
1587                 /* increase dwell time to wait for CONF frame */
1588                 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME);
1589                 break;
1590         case P2P_PAF_GON_CONF:
1591                 /* If we reached till GO Neg confirmation reset the filter */
1592                 brcmf_dbg(TRACE, "P2P: GO_NEG_PHASE status cleared\n");
1593                 clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status);
1594                 /* turn on mpc again if go nego is done */
1595                 config_af_params->mpc_onoff = 1;
1596                 /* minimize dwell time */
1597                 af_params->dwell_time = cpu_to_le32(P2P_AF_MIN_DWELL_TIME);
1598                 config_af_params->extra_listen = false;
1599                 break;
1600         case P2P_PAF_INVITE_REQ:
1601                 config_af_params->search_channel = true;
1602                 p2p->next_af_subtype = act_frm->subtype + 1;
1603                 /* increase dwell time */
1604                 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME);
1605                 break;
1606         case P2P_PAF_INVITE_RSP:
1607                 /* minimize dwell time */
1608                 af_params->dwell_time = cpu_to_le32(P2P_AF_MIN_DWELL_TIME);
1609                 config_af_params->extra_listen = false;
1610                 break;
1611         case P2P_PAF_DEVDIS_REQ:
1612                 config_af_params->search_channel = true;
1613                 p2p->next_af_subtype = act_frm->subtype + 1;
1614                 /* maximize dwell time to wait for RESP frame */
1615                 af_params->dwell_time = cpu_to_le32(P2P_AF_LONG_DWELL_TIME);
1616                 break;
1617         case P2P_PAF_DEVDIS_RSP:
1618                 /* minimize dwell time */
1619                 af_params->dwell_time = cpu_to_le32(P2P_AF_MIN_DWELL_TIME);
1620                 config_af_params->extra_listen = false;
1621                 break;
1622         case P2P_PAF_PROVDIS_REQ:
1623                 ie_len = le16_to_cpu(action_frame->len) -
1624                          offsetof(struct brcmf_p2p_pub_act_frame, elts);
1625                 if (cfg80211_get_p2p_attr(&act_frm->elts[0], ie_len,
1626                                           IEEE80211_P2P_ATTR_GROUP_ID,
1627                                           NULL, 0) < 0)
1628                         config_af_params->search_channel = true;
1629                 config_af_params->mpc_onoff = 0;
1630                 p2p->next_af_subtype = act_frm->subtype + 1;
1631                 /* increase dwell time to wait for RESP frame */
1632                 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME);
1633                 break;
1634         case P2P_PAF_PROVDIS_RSP:
1635                 /* wpa_supplicant send go nego req right after prov disc */
1636                 p2p->next_af_subtype = P2P_PAF_GON_REQ;
1637                 /* increase dwell time to MED level */
1638                 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME);
1639                 config_af_params->extra_listen = false;
1640                 break;
1641         default:
1642                 brcmf_err("Unknown p2p pub act frame subtype: %d\n",
1643                           act_frm->subtype);
1644                 err = -EINVAL;
1645         }
1646         return err;
1647 }
1648
1649 /**
1650  * brcmf_p2p_send_action_frame() - send action frame .
1651  *
1652  * @cfg: driver private data for cfg80211 interface.
1653  * @ndev: net device to transmit on.
1654  * @af_params: configuration data for action frame.
1655  */
1656 bool brcmf_p2p_send_action_frame(struct brcmf_cfg80211_info *cfg,
1657                                  struct net_device *ndev,
1658                                  struct brcmf_fil_af_params_le *af_params)
1659 {
1660         struct brcmf_p2p_info *p2p = &cfg->p2p;
1661         struct brcmf_if *ifp = netdev_priv(ndev);
1662         struct brcmf_fil_action_frame_le *action_frame;
1663         struct brcmf_config_af_params config_af_params;
1664         struct afx_hdl *afx_hdl = &p2p->afx_hdl;
1665         u16 action_frame_len;
1666         bool ack = false;
1667         u8 category;
1668         u8 action;
1669         s32 tx_retry;
1670         s32 extra_listen_time;
1671         uint delta_ms;
1672
1673         action_frame = &af_params->action_frame;
1674         action_frame_len = le16_to_cpu(action_frame->len);
1675
1676         brcmf_p2p_print_actframe(true, action_frame->data, action_frame_len);
1677
1678         /* Add the default dwell time. Dwell time to stay off-channel */
1679         /* to wait for a response action frame after transmitting an  */
1680         /* GO Negotiation action frame                                */
1681         af_params->dwell_time = cpu_to_le32(P2P_AF_DWELL_TIME);
1682
1683         category = action_frame->data[DOT11_ACTION_CAT_OFF];
1684         action = action_frame->data[DOT11_ACTION_ACT_OFF];
1685
1686         /* initialize variables */
1687         p2p->next_af_subtype = P2P_PAF_SUBTYPE_INVALID;
1688         p2p->gon_req_action = false;
1689
1690         /* config parameters */
1691         config_af_params.mpc_onoff = -1;
1692         config_af_params.search_channel = false;
1693         config_af_params.extra_listen = false;
1694
1695         if (brcmf_p2p_is_pub_action(action_frame->data, action_frame_len)) {
1696                 /* p2p public action frame process */
1697                 if (brcmf_p2p_pub_af_tx(cfg, af_params, &config_af_params)) {
1698                         /* Just send unknown subtype frame with */
1699                         /* default parameters.                  */
1700                         brcmf_err("P2P Public action frame, unknown subtype.\n");
1701                 }
1702         } else if (brcmf_p2p_is_gas_action(action_frame->data,
1703                                            action_frame_len)) {
1704                 /* service discovery process */
1705                 if (action == P2PSD_ACTION_ID_GAS_IREQ ||
1706                     action == P2PSD_ACTION_ID_GAS_CREQ) {
1707                         /* configure service discovery query frame */
1708                         config_af_params.search_channel = true;
1709
1710                         /* save next af suptype to cancel */
1711                         /* remaining dwell time           */
1712                         p2p->next_af_subtype = action + 1;
1713
1714                         af_params->dwell_time =
1715                                 cpu_to_le32(P2P_AF_MED_DWELL_TIME);
1716                 } else if (action == P2PSD_ACTION_ID_GAS_IRESP ||
1717                            action == P2PSD_ACTION_ID_GAS_CRESP) {
1718                         /* configure service discovery response frame */
1719                         af_params->dwell_time =
1720                                 cpu_to_le32(P2P_AF_MIN_DWELL_TIME);
1721                 } else {
1722                         brcmf_err("Unknown action type: %d\n", action);
1723                         goto exit;
1724                 }
1725         } else if (brcmf_p2p_is_p2p_action(action_frame->data,
1726                                            action_frame_len)) {
1727                 /* do not configure anything. it will be */
1728                 /* sent with a default configuration     */
1729         } else {
1730                 brcmf_err("Unknown Frame: category 0x%x, action 0x%x\n",
1731                           category, action);
1732                 return false;
1733         }
1734
1735         /* if connecting on primary iface, sleep for a while before sending
1736          * af tx for VSDB
1737          */
1738         if (test_bit(BRCMF_VIF_STATUS_CONNECTING,
1739                      &p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->sme_state))
1740                 msleep(50);
1741
1742         /* if scan is ongoing, abort current scan. */
1743         if (test_bit(BRCMF_SCAN_STATUS_BUSY, &cfg->scan_status))
1744                 brcmf_abort_scanning(cfg);
1745
1746         memcpy(afx_hdl->tx_dst_addr, action_frame->da, ETH_ALEN);
1747
1748         /* To make sure to send successfully action frame, turn off mpc */
1749         if (config_af_params.mpc_onoff == 0)
1750                 brcmf_set_mpc(ifp, 0);
1751
1752         /* set status and destination address before sending af */
1753         if (p2p->next_af_subtype != P2P_PAF_SUBTYPE_INVALID) {
1754                 /* set status to cancel the remained dwell time in rx process */
1755                 set_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status);
1756         }
1757
1758         p2p->af_sent_channel = 0;
1759         set_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status);
1760         /* validate channel and p2p ies */
1761         if (config_af_params.search_channel &&
1762             IS_P2P_SOCIAL_CHANNEL(le32_to_cpu(af_params->channel)) &&
1763             p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif->saved_ie.probe_req_ie_len) {
1764                 afx_hdl = &p2p->afx_hdl;
1765                 afx_hdl->peer_listen_chan = le32_to_cpu(af_params->channel);
1766
1767                 if (brcmf_p2p_af_searching_channel(p2p) ==
1768                                                         P2P_INVALID_CHANNEL) {
1769                         brcmf_err("Couldn't find peer's channel.\n");
1770                         goto exit;
1771                 }
1772
1773                 /* Abort scan even for VSDB scenarios. Scan gets aborted in
1774                  * firmware but after the check of piggyback algorithm. To take
1775                  * care of current piggback algo, lets abort the scan here
1776                  * itself.
1777                  */
1778                 brcmf_notify_escan_complete(cfg, ifp, true, true);
1779
1780                 /* update channel */
1781                 af_params->channel = cpu_to_le32(afx_hdl->peer_chan);
1782         }
1783
1784         tx_retry = 0;
1785         while (!p2p->block_gon_req_tx &&
1786                (ack == false) && (tx_retry < P2P_AF_TX_MAX_RETRY)) {
1787                 ack = !brcmf_p2p_tx_action_frame(p2p, af_params);
1788                 tx_retry++;
1789         }
1790         if (ack == false) {
1791                 brcmf_err("Failed to send Action Frame(retry %d)\n", tx_retry);
1792                 clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status);
1793         }
1794
1795 exit:
1796         clear_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status);
1797
1798         /* WAR: sometimes dongle does not keep the dwell time of 'actframe'.
1799          * if we coundn't get the next action response frame and dongle does
1800          * not keep the dwell time, go to listen state again to get next action
1801          * response frame.
1802          */
1803         if (ack && config_af_params.extra_listen && !p2p->block_gon_req_tx &&
1804             test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status) &&
1805             p2p->af_sent_channel == afx_hdl->my_listen_chan) {
1806                 delta_ms = jiffies_to_msecs(jiffies - p2p->af_tx_sent_jiffies);
1807                 if (le32_to_cpu(af_params->dwell_time) > delta_ms)
1808                         extra_listen_time = le32_to_cpu(af_params->dwell_time) -
1809                                             delta_ms;
1810                 else
1811                         extra_listen_time = 0;
1812                 if (extra_listen_time > 50) {
1813                         set_bit(BRCMF_P2P_STATUS_WAITING_NEXT_AF_LISTEN,
1814                                 &p2p->status);
1815                         brcmf_dbg(INFO, "Wait more time! actual af time:%d, calculated extra listen:%d\n",
1816                                   le32_to_cpu(af_params->dwell_time),
1817                                   extra_listen_time);
1818                         extra_listen_time += 100;
1819                         if (!brcmf_p2p_discover_listen(p2p,
1820                                                        p2p->af_sent_channel,
1821                                                        extra_listen_time)) {
1822                                 unsigned long duration;
1823
1824                                 extra_listen_time += 100;
1825                                 duration = msecs_to_jiffies(extra_listen_time);
1826                                 wait_for_completion_timeout(&p2p->wait_next_af,
1827                                                             duration);
1828                         }
1829                         clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_AF_LISTEN,
1830                                   &p2p->status);
1831                 }
1832         }
1833
1834         if (p2p->block_gon_req_tx) {
1835                 /* if ack is true, supplicant will wait more time(100ms).
1836                  * so we will return it as a success to get more time .
1837                  */
1838                 p2p->block_gon_req_tx = false;
1839                 ack = true;
1840         }
1841
1842         clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status);
1843         /* if all done, turn mpc on again */
1844         if (config_af_params.mpc_onoff == 1)
1845                 brcmf_set_mpc(ifp, 1);
1846
1847         return ack;
1848 }
1849
1850 /**
1851  * brcmf_p2p_notify_rx_mgmt_p2p_probereq() - Event handler for p2p probe req.
1852  *
1853  * @ifp: interface pointer for which event was received.
1854  * @e: even message.
1855  * @data: payload of event message (probe request).
1856  */
1857 s32 brcmf_p2p_notify_rx_mgmt_p2p_probereq(struct brcmf_if *ifp,
1858                                           const struct brcmf_event_msg *e,
1859                                           void *data)
1860 {
1861         struct brcmf_cfg80211_info *cfg = ifp->drvr->config;
1862         struct brcmf_p2p_info *p2p = &cfg->p2p;
1863         struct afx_hdl *afx_hdl = &p2p->afx_hdl;
1864         struct brcmf_cfg80211_vif *vif = ifp->vif;
1865         struct brcmf_rx_mgmt_data *rxframe = (struct brcmf_rx_mgmt_data *)data;
1866         u16 chanspec = be16_to_cpu(rxframe->chanspec);
1867         struct brcmu_chan ch;
1868         u8 *mgmt_frame;
1869         u32 mgmt_frame_len;
1870         s32 freq;
1871         u16 mgmt_type;
1872
1873         brcmf_dbg(INFO, "Enter: event %d reason %d\n", e->event_code,
1874                   e->reason);
1875
1876         if (e->datalen < sizeof(*rxframe)) {
1877                 brcmf_dbg(SCAN, "Event data to small. Ignore\n");
1878                 return 0;
1879         }
1880
1881         ch.chspec = be16_to_cpu(rxframe->chanspec);
1882         cfg->d11inf.decchspec(&ch);
1883
1884         if (test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status) &&
1885             (ether_addr_equal(afx_hdl->tx_dst_addr, e->addr))) {
1886                 afx_hdl->peer_chan = ch.control_ch_num;
1887                 brcmf_dbg(INFO, "PROBE REQUEST: Peer found, channel=%d\n",
1888                           afx_hdl->peer_chan);
1889                 complete(&afx_hdl->act_frm_scan);
1890         }
1891
1892         /* Firmware sends us two proberesponses for each idx one. At the */
1893         /* moment anything but bsscfgidx 0 is passed up to supplicant    */
1894         if (e->bsscfgidx == 0)
1895                 return 0;
1896
1897         /* Filter any P2P probe reqs arriving during the GO-NEG Phase */
1898         if (test_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status)) {
1899                 brcmf_dbg(INFO, "Filtering P2P probe_req in GO-NEG phase\n");
1900                 return 0;
1901         }
1902
1903         /* Check if wpa_supplicant has registered for this frame */
1904         brcmf_dbg(INFO, "vif->mgmt_rx_reg %04x\n", vif->mgmt_rx_reg);
1905         mgmt_type = (IEEE80211_STYPE_PROBE_REQ & IEEE80211_FCTL_STYPE) >> 4;
1906         if ((vif->mgmt_rx_reg & BIT(mgmt_type)) == 0)
1907                 return 0;
1908
1909         mgmt_frame = (u8 *)(rxframe + 1);
1910         mgmt_frame_len = e->datalen - sizeof(*rxframe);
1911         freq = ieee80211_channel_to_frequency(ch.control_ch_num,
1912                                               ch.band == BRCMU_CHAN_BAND_2G ?
1913                                               NL80211_BAND_2GHZ :
1914                                               NL80211_BAND_5GHZ);
1915
1916         cfg80211_rx_mgmt(&vif->wdev, freq, 0, mgmt_frame, mgmt_frame_len, 0);
1917
1918         brcmf_dbg(INFO, "mgmt_frame_len (%d) , e->datalen (%d), chanspec (%04x), freq (%d)\n",
1919                   mgmt_frame_len, e->datalen, chanspec, freq);
1920
1921         return 0;
1922 }
1923
1924
1925 /**
1926  * brcmf_p2p_get_current_chanspec() - Get current operation channel.
1927  *
1928  * @p2p: P2P specific data.
1929  * @chanspec: chanspec to be returned.
1930  */
1931 static void brcmf_p2p_get_current_chanspec(struct brcmf_p2p_info *p2p,
1932                                            u16 *chanspec)
1933 {
1934         struct brcmf_if *ifp;
1935         u8 mac_addr[ETH_ALEN];
1936         struct brcmu_chan ch;
1937         struct brcmf_bss_info_le *bi;
1938         u8 *buf;
1939
1940         ifp = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->ifp;
1941
1942         if (brcmf_fil_cmd_data_get(ifp, BRCMF_C_GET_BSSID, mac_addr,
1943                                    ETH_ALEN) == 0) {
1944                 buf = kzalloc(WL_BSS_INFO_MAX, GFP_KERNEL);
1945                 if (buf != NULL) {
1946                         *(__le32 *)buf = cpu_to_le32(WL_BSS_INFO_MAX);
1947                         if (brcmf_fil_cmd_data_get(ifp, BRCMF_C_GET_BSS_INFO,
1948                                                    buf, WL_BSS_INFO_MAX) == 0) {
1949                                 bi = (struct brcmf_bss_info_le *)(buf + 4);
1950                                 *chanspec = le16_to_cpu(bi->chanspec);
1951                                 kfree(buf);
1952                                 return;
1953                         }
1954                         kfree(buf);
1955                 }
1956         }
1957         /* Use default channel for P2P */
1958         ch.chnum = BRCMF_P2P_TEMP_CHAN;
1959         ch.bw = BRCMU_CHAN_BW_20;
1960         p2p->cfg->d11inf.encchspec(&ch);
1961         *chanspec = ch.chspec;
1962 }
1963
1964 /**
1965  * Change a P2P Role.
1966  * Parameters:
1967  * @mac: MAC address of the BSS to change a role
1968  * Returns 0 if success.
1969  */
1970 int brcmf_p2p_ifchange(struct brcmf_cfg80211_info *cfg,
1971                        enum brcmf_fil_p2p_if_types if_type)
1972 {
1973         struct brcmf_p2p_info *p2p = &cfg->p2p;
1974         struct brcmf_cfg80211_vif *vif;
1975         struct brcmf_fil_p2p_if_le if_request;
1976         s32 err;
1977         u16 chanspec;
1978
1979         brcmf_dbg(TRACE, "Enter\n");
1980
1981         vif = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif;
1982         if (!vif) {
1983                 brcmf_err("vif for P2PAPI_BSSCFG_PRIMARY does not exist\n");
1984                 return -EPERM;
1985         }
1986         brcmf_notify_escan_complete(cfg, vif->ifp, true, true);
1987         vif = p2p->bss_idx[P2PAPI_BSSCFG_CONNECTION].vif;
1988         if (!vif) {
1989                 brcmf_err("vif for P2PAPI_BSSCFG_CONNECTION does not exist\n");
1990                 return -EPERM;
1991         }
1992         brcmf_set_mpc(vif->ifp, 0);
1993
1994         /* In concurrency case, STA may be already associated in a particular */
1995         /* channel. so retrieve the current channel of primary interface and  */
1996         /* then start the virtual interface on that.                          */
1997         brcmf_p2p_get_current_chanspec(p2p, &chanspec);
1998
1999         if_request.type = cpu_to_le16((u16)if_type);
2000         if_request.chspec = cpu_to_le16(chanspec);
2001         memcpy(if_request.addr, p2p->int_addr, sizeof(if_request.addr));
2002
2003         brcmf_cfg80211_arm_vif_event(cfg, vif);
2004         err = brcmf_fil_iovar_data_set(vif->ifp, "p2p_ifupd", &if_request,
2005                                        sizeof(if_request));
2006         if (err) {
2007                 brcmf_err("p2p_ifupd FAILED, err=%d\n", err);
2008                 brcmf_cfg80211_arm_vif_event(cfg, NULL);
2009                 return err;
2010         }
2011         err = brcmf_cfg80211_wait_vif_event(cfg, BRCMF_E_IF_CHANGE,
2012                                             BRCMF_VIF_EVENT_TIMEOUT);
2013         brcmf_cfg80211_arm_vif_event(cfg, NULL);
2014         if (!err)  {
2015                 brcmf_err("No BRCMF_E_IF_CHANGE event received\n");
2016                 return -EIO;
2017         }
2018
2019         err = brcmf_fil_cmd_int_set(vif->ifp, BRCMF_C_SET_SCB_TIMEOUT,
2020                                     BRCMF_SCB_TIMEOUT_VALUE);
2021
2022         return err;
2023 }
2024
2025 static int brcmf_p2p_request_p2p_if(struct brcmf_p2p_info *p2p,
2026                                     struct brcmf_if *ifp, u8 ea[ETH_ALEN],
2027                                     enum brcmf_fil_p2p_if_types iftype)
2028 {
2029         struct brcmf_fil_p2p_if_le if_request;
2030         int err;
2031         u16 chanspec;
2032
2033         /* we need a default channel */
2034         brcmf_p2p_get_current_chanspec(p2p, &chanspec);
2035
2036         /* fill the firmware request */
2037         memcpy(if_request.addr, ea, ETH_ALEN);
2038         if_request.type = cpu_to_le16((u16)iftype);
2039         if_request.chspec = cpu_to_le16(chanspec);
2040
2041         err = brcmf_fil_iovar_data_set(ifp, "p2p_ifadd", &if_request,
2042                                        sizeof(if_request));
2043
2044         return err;
2045 }
2046
2047 static int brcmf_p2p_disable_p2p_if(struct brcmf_cfg80211_vif *vif)
2048 {
2049         struct brcmf_cfg80211_info *cfg = wdev_to_cfg(&vif->wdev);
2050         struct net_device *pri_ndev = cfg_to_ndev(cfg);
2051         struct brcmf_if *ifp = netdev_priv(pri_ndev);
2052         u8 *addr = vif->wdev.netdev->dev_addr;
2053
2054         return brcmf_fil_iovar_data_set(ifp, "p2p_ifdis", addr, ETH_ALEN);
2055 }
2056
2057 static int brcmf_p2p_release_p2p_if(struct brcmf_cfg80211_vif *vif)
2058 {
2059         struct brcmf_cfg80211_info *cfg = wdev_to_cfg(&vif->wdev);
2060         struct net_device *pri_ndev = cfg_to_ndev(cfg);
2061         struct brcmf_if *ifp = netdev_priv(pri_ndev);
2062         u8 *addr = vif->wdev.netdev->dev_addr;
2063
2064         return brcmf_fil_iovar_data_set(ifp, "p2p_ifdel", addr, ETH_ALEN);
2065 }
2066
2067 /**
2068  * brcmf_p2p_create_p2pdev() - create a P2P_DEVICE virtual interface.
2069  *
2070  * @p2p: P2P specific data.
2071  * @wiphy: wiphy device of new interface.
2072  * @addr: mac address for this new interface.
2073  */
2074 static struct wireless_dev *brcmf_p2p_create_p2pdev(struct brcmf_p2p_info *p2p,
2075                                                     struct wiphy *wiphy,
2076                                                     u8 *addr)
2077 {
2078         struct brcmf_cfg80211_vif *p2p_vif;
2079         struct brcmf_if *p2p_ifp;
2080         struct brcmf_if *pri_ifp;
2081         int err;
2082         u32 bsscfgidx;
2083
2084         if (p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif)
2085                 return ERR_PTR(-ENOSPC);
2086
2087         p2p_vif = brcmf_alloc_vif(p2p->cfg, NL80211_IFTYPE_P2P_DEVICE);
2088         if (IS_ERR(p2p_vif)) {
2089                 brcmf_err("could not create discovery vif\n");
2090                 return (struct wireless_dev *)p2p_vif;
2091         }
2092
2093         pri_ifp = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->ifp;
2094         brcmf_p2p_generate_bss_mac(p2p, addr);
2095         brcmf_p2p_set_firmware(pri_ifp, p2p->dev_addr);
2096
2097         brcmf_cfg80211_arm_vif_event(p2p->cfg, p2p_vif);
2098         brcmf_fweh_p2pdev_setup(pri_ifp, true);
2099
2100         /* Initialize P2P Discovery in the firmware */
2101         err = brcmf_fil_iovar_int_set(pri_ifp, "p2p_disc", 1);
2102         if (err < 0) {
2103                 brcmf_err("set p2p_disc error\n");
2104                 brcmf_fweh_p2pdev_setup(pri_ifp, false);
2105                 brcmf_cfg80211_arm_vif_event(p2p->cfg, NULL);
2106                 goto fail;
2107         }
2108
2109         /* wait for firmware event */
2110         err = brcmf_cfg80211_wait_vif_event(p2p->cfg, BRCMF_E_IF_ADD,
2111                                             BRCMF_VIF_EVENT_TIMEOUT);
2112         brcmf_cfg80211_arm_vif_event(p2p->cfg, NULL);
2113         brcmf_fweh_p2pdev_setup(pri_ifp, false);
2114         if (!err) {
2115                 brcmf_err("timeout occurred\n");
2116                 err = -EIO;
2117                 goto fail;
2118         }
2119
2120         /* discovery interface created */
2121         p2p_ifp = p2p_vif->ifp;
2122         p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif = p2p_vif;
2123         memcpy(p2p_ifp->mac_addr, p2p->dev_addr, ETH_ALEN);
2124         memcpy(&p2p_vif->wdev.address, p2p->dev_addr, sizeof(p2p->dev_addr));
2125
2126         /* verify bsscfg index for P2P discovery */
2127         err = brcmf_fil_iovar_int_get(pri_ifp, "p2p_dev", &bsscfgidx);
2128         if (err < 0) {
2129                 brcmf_err("retrieving discover bsscfg index failed\n");
2130                 goto fail;
2131         }
2132
2133         WARN_ON(p2p_ifp->bsscfgidx != bsscfgidx);
2134
2135         init_completion(&p2p->send_af_done);
2136         INIT_WORK(&p2p->afx_hdl.afx_work, brcmf_p2p_afx_handler);
2137         init_completion(&p2p->afx_hdl.act_frm_scan);
2138         init_completion(&p2p->wait_next_af);
2139
2140         return &p2p_vif->wdev;
2141
2142 fail:
2143         brcmf_free_vif(p2p_vif);
2144         return ERR_PTR(err);
2145 }
2146
2147 /**
2148  * brcmf_p2p_add_vif() - create a new P2P virtual interface.
2149  *
2150  * @wiphy: wiphy device of new interface.
2151  * @name: name of the new interface.
2152  * @name_assign_type: origin of the interface name
2153  * @type: nl80211 interface type.
2154  * @flags: not used.
2155  * @params: contains mac address for P2P device.
2156  */
2157 struct wireless_dev *brcmf_p2p_add_vif(struct wiphy *wiphy, const char *name,
2158                                        unsigned char name_assign_type,
2159                                        enum nl80211_iftype type, u32 *flags,
2160                                        struct vif_params *params)
2161 {
2162         struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
2163         struct brcmf_if *ifp = netdev_priv(cfg_to_ndev(cfg));
2164         struct brcmf_cfg80211_vif *vif;
2165         enum brcmf_fil_p2p_if_types iftype;
2166         int err;
2167
2168         if (brcmf_cfg80211_vif_event_armed(cfg))
2169                 return ERR_PTR(-EBUSY);
2170
2171         brcmf_dbg(INFO, "adding vif \"%s\" (type=%d)\n", name, type);
2172
2173         switch (type) {
2174         case NL80211_IFTYPE_P2P_CLIENT:
2175                 iftype = BRCMF_FIL_P2P_IF_CLIENT;
2176                 break;
2177         case NL80211_IFTYPE_P2P_GO:
2178                 iftype = BRCMF_FIL_P2P_IF_GO;
2179                 break;
2180         case NL80211_IFTYPE_P2P_DEVICE:
2181                 return brcmf_p2p_create_p2pdev(&cfg->p2p, wiphy,
2182                                                params->macaddr);
2183         default:
2184                 return ERR_PTR(-EOPNOTSUPP);
2185         }
2186
2187         vif = brcmf_alloc_vif(cfg, type);
2188         if (IS_ERR(vif))
2189                 return (struct wireless_dev *)vif;
2190         brcmf_cfg80211_arm_vif_event(cfg, vif);
2191
2192         err = brcmf_p2p_request_p2p_if(&cfg->p2p, ifp, cfg->p2p.int_addr,
2193                                        iftype);
2194         if (err) {
2195                 brcmf_cfg80211_arm_vif_event(cfg, NULL);
2196                 goto fail;
2197         }
2198
2199         /* wait for firmware event */
2200         err = brcmf_cfg80211_wait_vif_event(cfg, BRCMF_E_IF_ADD,
2201                                             BRCMF_VIF_EVENT_TIMEOUT);
2202         brcmf_cfg80211_arm_vif_event(cfg, NULL);
2203         if (!err) {
2204                 brcmf_err("timeout occurred\n");
2205                 err = -EIO;
2206                 goto fail;
2207         }
2208
2209         /* interface created in firmware */
2210         ifp = vif->ifp;
2211         if (!ifp) {
2212                 brcmf_err("no if pointer provided\n");
2213                 err = -ENOENT;
2214                 goto fail;
2215         }
2216
2217         strncpy(ifp->ndev->name, name, sizeof(ifp->ndev->name) - 1);
2218         ifp->ndev->name_assign_type = name_assign_type;
2219         err = brcmf_net_attach(ifp, true);
2220         if (err) {
2221                 brcmf_err("Registering netdevice failed\n");
2222                 goto fail;
2223         }
2224
2225         cfg->p2p.bss_idx[P2PAPI_BSSCFG_CONNECTION].vif = vif;
2226         /* Disable firmware roaming for P2P interface  */
2227         brcmf_fil_iovar_int_set(ifp, "roam_off", 1);
2228         if (iftype == BRCMF_FIL_P2P_IF_GO) {
2229                 /* set station timeout for p2p */
2230                 brcmf_fil_cmd_int_set(ifp, BRCMF_C_SET_SCB_TIMEOUT,
2231                                       BRCMF_SCB_TIMEOUT_VALUE);
2232         }
2233         return &ifp->vif->wdev;
2234
2235 fail:
2236         brcmf_free_vif(vif);
2237         return ERR_PTR(err);
2238 }
2239
2240 /**
2241  * brcmf_p2p_del_vif() - delete a P2P virtual interface.
2242  *
2243  * @wiphy: wiphy device of interface.
2244  * @wdev: wireless device of interface.
2245  */
2246 int brcmf_p2p_del_vif(struct wiphy *wiphy, struct wireless_dev *wdev)
2247 {
2248         struct brcmf_cfg80211_info *cfg = wiphy_priv(wiphy);
2249         struct brcmf_p2p_info *p2p = &cfg->p2p;
2250         struct brcmf_cfg80211_vif *vif;
2251         enum nl80211_iftype iftype;
2252         bool wait_for_disable = false;
2253         int err;
2254
2255         brcmf_dbg(TRACE, "delete P2P vif\n");
2256         vif = container_of(wdev, struct brcmf_cfg80211_vif, wdev);
2257
2258         iftype = vif->wdev.iftype;
2259         brcmf_cfg80211_arm_vif_event(cfg, vif);
2260         switch (iftype) {
2261         case NL80211_IFTYPE_P2P_CLIENT:
2262                 if (test_bit(BRCMF_VIF_STATUS_DISCONNECTING, &vif->sme_state))
2263                         wait_for_disable = true;
2264                 break;
2265
2266         case NL80211_IFTYPE_P2P_GO:
2267                 if (!brcmf_p2p_disable_p2p_if(vif))
2268                         wait_for_disable = true;
2269                 break;
2270
2271         case NL80211_IFTYPE_P2P_DEVICE:
2272                 if (!p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif)
2273                         return 0;
2274                 brcmf_p2p_cancel_remain_on_channel(vif->ifp);
2275                 brcmf_p2p_deinit_discovery(p2p);
2276                 break;
2277
2278         default:
2279                 return -ENOTSUPP;
2280         }
2281
2282         clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status);
2283         brcmf_dbg(INFO, "P2P: GO_NEG_PHASE status cleared\n");
2284
2285         if (wait_for_disable)
2286                 wait_for_completion_timeout(&cfg->vif_disabled,
2287                                             BRCMF_P2P_DISABLE_TIMEOUT);
2288
2289         err = 0;
2290         if (iftype != NL80211_IFTYPE_P2P_DEVICE) {
2291                 brcmf_vif_clear_mgmt_ies(vif);
2292                 err = brcmf_p2p_release_p2p_if(vif);
2293         }
2294         if (!err) {
2295                 /* wait for firmware event */
2296                 err = brcmf_cfg80211_wait_vif_event(cfg, BRCMF_E_IF_DEL,
2297                                                     BRCMF_VIF_EVENT_TIMEOUT);
2298                 if (!err)
2299                         err = -EIO;
2300                 else
2301                         err = 0;
2302         }
2303         brcmf_remove_interface(vif->ifp, true);
2304
2305         brcmf_cfg80211_arm_vif_event(cfg, NULL);
2306         if (iftype != NL80211_IFTYPE_P2P_DEVICE)
2307                 p2p->bss_idx[P2PAPI_BSSCFG_CONNECTION].vif = NULL;
2308
2309         return err;
2310 }
2311
2312 void brcmf_p2p_ifp_removed(struct brcmf_if *ifp, bool rtnl_locked)
2313 {
2314         struct brcmf_cfg80211_info *cfg;
2315         struct brcmf_cfg80211_vif *vif;
2316
2317         brcmf_dbg(INFO, "P2P: device interface removed\n");
2318         vif = ifp->vif;
2319         cfg = wdev_to_cfg(&vif->wdev);
2320         cfg->p2p.bss_idx[P2PAPI_BSSCFG_DEVICE].vif = NULL;
2321         if (!rtnl_locked)
2322                 rtnl_lock();
2323         cfg80211_unregister_wdev(&vif->wdev);
2324         if (!rtnl_locked)
2325                 rtnl_unlock();
2326         brcmf_free_vif(vif);
2327 }
2328
2329 int brcmf_p2p_start_device(struct wiphy *wiphy, struct wireless_dev *wdev)
2330 {
2331         struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
2332         struct brcmf_p2p_info *p2p = &cfg->p2p;
2333         struct brcmf_cfg80211_vif *vif;
2334         int err;
2335
2336         vif = container_of(wdev, struct brcmf_cfg80211_vif, wdev);
2337         mutex_lock(&cfg->usr_sync);
2338         err = brcmf_p2p_enable_discovery(p2p);
2339         if (!err)
2340                 set_bit(BRCMF_VIF_STATUS_READY, &vif->sme_state);
2341         mutex_unlock(&cfg->usr_sync);
2342         return err;
2343 }
2344
2345 void brcmf_p2p_stop_device(struct wiphy *wiphy, struct wireless_dev *wdev)
2346 {
2347         struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
2348         struct brcmf_p2p_info *p2p = &cfg->p2p;
2349         struct brcmf_cfg80211_vif *vif;
2350
2351         vif = container_of(wdev, struct brcmf_cfg80211_vif, wdev);
2352         /* This call can be result of the unregister_wdev call. In that case
2353          * we dont want to do anything anymore. Just return. The config vif
2354          * will have been cleared at this point.
2355          */
2356         if (p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif == vif) {
2357                 mutex_lock(&cfg->usr_sync);
2358                 /* Set the discovery state to SCAN */
2359                 (void)brcmf_p2p_set_discover_state(vif->ifp,
2360                                                    WL_P2P_DISC_ST_SCAN, 0, 0);
2361                 brcmf_abort_scanning(cfg);
2362                 clear_bit(BRCMF_VIF_STATUS_READY, &vif->sme_state);
2363                 mutex_unlock(&cfg->usr_sync);
2364         }
2365 }
2366
2367 /**
2368  * brcmf_p2p_attach() - attach for P2P.
2369  *
2370  * @cfg: driver private data for cfg80211 interface.
2371  * @p2pdev_forced: create p2p device interface at attach.
2372  */
2373 s32 brcmf_p2p_attach(struct brcmf_cfg80211_info *cfg, bool p2pdev_forced)
2374 {
2375         struct brcmf_p2p_info *p2p;
2376         struct brcmf_if *pri_ifp;
2377         s32 err = 0;
2378         void *err_ptr;
2379
2380         p2p = &cfg->p2p;
2381         p2p->cfg = cfg;
2382
2383         pri_ifp = brcmf_get_ifp(cfg->pub, 0);
2384         p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif = pri_ifp->vif;
2385
2386         if (p2pdev_forced) {
2387                 err_ptr = brcmf_p2p_create_p2pdev(p2p, NULL, NULL);
2388                 if (IS_ERR(err_ptr)) {
2389                         brcmf_err("P2P device creation failed.\n");
2390                         err = PTR_ERR(err_ptr);
2391                 }
2392         } else {
2393                 p2p->p2pdev_dynamically = true;
2394         }
2395         return err;
2396 }
2397
2398 /**
2399  * brcmf_p2p_detach() - detach P2P.
2400  *
2401  * @p2p: P2P specific data.
2402  */
2403 void brcmf_p2p_detach(struct brcmf_p2p_info *p2p)
2404 {
2405         struct brcmf_cfg80211_vif *vif;
2406
2407         vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif;
2408         if (vif != NULL) {
2409                 brcmf_p2p_cancel_remain_on_channel(vif->ifp);
2410                 brcmf_p2p_deinit_discovery(p2p);
2411                 brcmf_remove_interface(vif->ifp, false);
2412         }
2413         /* just set it all to zero */
2414         memset(p2p, 0, sizeof(*p2p));
2415 }
2416