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

   1 /*
   2  * Copyright (c) 2012 Broadcom Corporation
   3  *
   4  * Permission to use, copy, modify, and/or distribute this software for any
   5  * purpose with or without fee is hereby granted, provided that the above
   6  * copyright notice and this permission notice appear in all copies.
   7  *
   8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
  11  * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
  13  * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
  14  * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15  */
  16 #include <linux/slab.h>
  17 #include <linux/netdevice.h>
  18 #include <linux/etherdevice.h>
  19 #include <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            2000
  75 #define P2P_INVALID_CHANNEL             -1
  76 #define P2P_CHANNEL_SYNC_RETRY          5
  77 #define P2P_AF_FRM_SCAN_MAX_WAIT        1500
  78 #define P2P_DEFAULT_SLEEP_TIME_VSDB     200
  79
  80 /* WiFi P2P Public Action Frame OUI Subtypes */
  81 #define P2P_PAF_GON_REQ         0       /* Group Owner Negotiation Req */
  82 #define P2P_PAF_GON_RSP         1       /* Group Owner Negotiation Rsp */
  83 #define P2P_PAF_GON_CONF        2       /* Group Owner Negotiation Confirm */
  84 #define P2P_PAF_INVITE_REQ      3       /* P2P Invitation Request */
  85 #define P2P_PAF_INVITE_RSP      4       /* P2P Invitation Response */
  86 #define P2P_PAF_DEVDIS_REQ      5       /* Device Discoverability Request */
  87 #define P2P_PAF_DEVDIS_RSP      6       /* Device Discoverability Response */
  88 #define P2P_PAF_PROVDIS_REQ     7       /* Provision Discovery Request */
  89 #define P2P_PAF_PROVDIS_RSP     8       /* Provision Discovery Response */
  90 #define P2P_PAF_SUBTYPE_INVALID 255     /* Invalid Subtype */
  91
  92 /* WiFi P2P Action Frame OUI Subtypes */
  93 #define P2P_AF_NOTICE_OF_ABSENCE        0       /* Notice of Absence */
  94 #define P2P_AF_PRESENCE_REQ             1       /* P2P Presence Request */
  95 #define P2P_AF_PRESENCE_RSP             2       /* P2P Presence Response */
  96 #define P2P_AF_GO_DISC_REQ              3       /* GO Discoverability Request */
  97
  98 /* P2P Service Discovery related */
  99 #define P2PSD_ACTION_CATEGORY           0x04    /* Public action frame */
 100 #define P2PSD_ACTION_ID_GAS_IREQ        0x0a    /* GAS Initial Request AF */
 101 #define P2PSD_ACTION_ID_GAS_IRESP       0x0b    /* GAS Initial Response AF */
 102 #define P2PSD_ACTION_ID_GAS_CREQ        0x0c    /* GAS Comback Request AF */
 103 #define P2PSD_ACTION_ID_GAS_CRESP       0x0d    /* GAS Comback Response AF */
 104
 105 /**
 106  * struct brcmf_p2p_disc_st_le - set discovery state in firmware.
 107  *
 108  * @state: requested discovery state (see enum brcmf_p2p_disc_state).
 109  * @chspec: channel parameter for %WL_P2P_DISC_ST_LISTEN state.
 110  * @dwell: dwell time in ms for %WL_P2P_DISC_ST_LISTEN state.
 111  */
 112 struct brcmf_p2p_disc_st_le {
 113         u8 state;
 114         __le16 chspec;
 115         __le16 dwell;
 116 };
 117
 118 /**
 119  * enum brcmf_p2p_disc_state - P2P discovery state values
 120  *
 121  * @WL_P2P_DISC_ST_SCAN: P2P discovery with wildcard SSID and P2P IE.
 122  * @WL_P2P_DISC_ST_LISTEN: P2P discovery off-channel for specified time.
 123  * @WL_P2P_DISC_ST_SEARCH: P2P discovery with P2P wildcard SSID and P2P IE.
 124  */
 125 enum brcmf_p2p_disc_state {
 126         WL_P2P_DISC_ST_SCAN,
 127         WL_P2P_DISC_ST_LISTEN,
 128         WL_P2P_DISC_ST_SEARCH
 129 };
 130
 131 /**
 132  * struct brcmf_p2p_scan_le - P2P specific scan request.
 133  *
 134  * @type: type of scan method requested (values: 'E' or 'S').
 135  * @reserved: reserved (ignored).
 136  * @eparams: parameters used for type 'E'.
 137  * @sparams: parameters used for type 'S'.
 138  */
 139 struct brcmf_p2p_scan_le {
 140         u8 type;
 141         u8 reserved[3];
 142         union {
 143                 struct brcmf_escan_params_le eparams;
 144                 struct brcmf_scan_params_le sparams;
 145         };
 146 };
 147
 148 /**
 149  * struct brcmf_p2p_pub_act_frame - WiFi P2P Public Action Frame
 150  *
 151  * @category: P2P_PUB_AF_CATEGORY
 152  * @action: P2P_PUB_AF_ACTION
 153  * @oui[3]: P2P_OUI
 154  * @oui_type: OUI type - P2P_VER
 155  * @subtype: OUI subtype - P2P_TYPE_*
 156  * @dialog_token: nonzero, identifies req/rsp transaction
 157  * @elts[1]: Variable length information elements.
 158  */
 159 struct brcmf_p2p_pub_act_frame {
 160         u8      category;
 161         u8      action;
 162         u8      oui[3];
 163         u8      oui_type;
 164         u8      subtype;
 165         u8      dialog_token;
 166         u8      elts[1];
 167 };
 168
 169 /**
 170  * struct brcmf_p2p_action_frame - WiFi P2P Action Frame
 171  *
 172  * @category: P2P_AF_CATEGORY
 173  * @OUI[3]: OUI - P2P_OUI
 174  * @type: OUI Type - P2P_VER
 175  * @subtype: OUI Subtype - P2P_AF_*
 176  * @dialog_token: nonzero, identifies req/resp tranaction
 177  * @elts[1]: Variable length information elements.
 178  */
 179 struct brcmf_p2p_action_frame {
 180         u8      category;
 181         u8      oui[3];
 182         u8      type;
 183         u8      subtype;
 184         u8      dialog_token;
 185         u8      elts[1];
 186 };
 187
 188 /**
 189  * struct brcmf_p2psd_gas_pub_act_frame - Wi-Fi GAS Public Action Frame
 190  *
 191  * @category: 0x04 Public Action Frame
 192  * @action: 0x6c Advertisement Protocol
 193  * @dialog_token: nonzero, identifies req/rsp transaction
 194  * @query_data[1]: Query Data. SD gas ireq SD gas iresp
 195  */
 196 struct brcmf_p2psd_gas_pub_act_frame {
 197         u8      category;
 198         u8      action;
 199         u8      dialog_token;
 200         u8      query_data[1];
 201 };
 202
 203 /**
 204  * struct brcmf_config_af_params - Action Frame Parameters for tx.
 205  *
 206  * @mpc_onoff: To make sure to send successfully action frame, we have to
 207  *             turn off mpc  0: off, 1: on,  (-1): do nothing
 208  * @search_channel: 1: search peer's channel to send af
 209  * extra_listen: keep the dwell time to get af response frame.
 210  */
 211 struct brcmf_config_af_params {
 212         s32 mpc_onoff;
 213         bool search_channel;
 214         bool extra_listen;
 215 };
 216
 217 /**
 218  * brcmf_p2p_is_pub_action() - true if p2p public type frame.
 219  *
 220  * @frame: action frame data.
 221  * @frame_len: length of action frame data.
 222  *
 223  * Determine if action frame is p2p public action type
 224  */
 225 static bool brcmf_p2p_is_pub_action(void *frame, u32 frame_len)
 226 {
 227         struct brcmf_p2p_pub_act_frame *pact_frm;
 228
 229         if (frame == NULL)
 230                 return false;
 231
 232         pact_frm = (struct brcmf_p2p_pub_act_frame *)frame;
 233         if (frame_len < sizeof(struct brcmf_p2p_pub_act_frame) - 1)
 234                 return false;
 235
 236         if (pact_frm->category == P2P_PUB_AF_CATEGORY &&
 237             pact_frm->action == P2P_PUB_AF_ACTION &&
 238             pact_frm->oui_type == P2P_VER &&
 239             memcmp(pact_frm->oui, P2P_OUI, P2P_OUI_LEN) == 0)
 240                 return true;
 241
 242         return false;
 243 }
 244
 245 /**
 246  * brcmf_p2p_is_p2p_action() - true if p2p action type frame.
 247  *
 248  * @frame: action frame data.
 249  * @frame_len: length of action frame data.
 250  *
 251  * Determine if action frame is p2p action type
 252  */
 253 static bool brcmf_p2p_is_p2p_action(void *frame, u32 frame_len)
 254 {
 255         struct brcmf_p2p_action_frame *act_frm;
 256
 257         if (frame == NULL)
 258                 return false;
 259
 260         act_frm = (struct brcmf_p2p_action_frame *)frame;
 261         if (frame_len < sizeof(struct brcmf_p2p_action_frame) - 1)
 262                 return false;
 263
 264         if (act_frm->category == P2P_AF_CATEGORY &&
 265             act_frm->type  == P2P_VER &&
 266             memcmp(act_frm->oui, P2P_OUI, P2P_OUI_LEN) == 0)
 267                 return true;
 268
 269         return false;
 270 }
 271
 272 /**
 273  * brcmf_p2p_is_gas_action() - true if p2p gas action type frame.
 274  *
 275  * @frame: action frame data.
 276  * @frame_len: length of action frame data.
 277  *
 278  * Determine if action frame is p2p gas action type
 279  */
 280 static bool brcmf_p2p_is_gas_action(void *frame, u32 frame_len)
 281 {
 282         struct brcmf_p2psd_gas_pub_act_frame *sd_act_frm;
 283
 284         if (frame == NULL)
 285                 return false;
 286
 287         sd_act_frm = (struct brcmf_p2psd_gas_pub_act_frame *)frame;
 288         if (frame_len < sizeof(struct brcmf_p2psd_gas_pub_act_frame) - 1)
 289                 return false;
 290
 291         if (sd_act_frm->category != P2PSD_ACTION_CATEGORY)
 292                 return false;
 293
 294         if (sd_act_frm->action == P2PSD_ACTION_ID_GAS_IREQ ||
 295             sd_act_frm->action == P2PSD_ACTION_ID_GAS_IRESP ||
 296             sd_act_frm->action == P2PSD_ACTION_ID_GAS_CREQ ||
 297             sd_act_frm->action == P2PSD_ACTION_ID_GAS_CRESP)
 298                 return true;
 299
 300         return false;
 301 }
 302
 303 /**
 304  * brcmf_p2p_print_actframe() - debug print routine.
 305  *
 306  * @tx: Received or to be transmitted
 307  * @frame: action frame data.
 308  * @frame_len: length of action frame data.
 309  *
 310  * Print information about the p2p action frame
 311  */
 312
 313 #ifdef DEBUG
 314
 315 static void brcmf_p2p_print_actframe(bool tx, void *frame, u32 frame_len)
 316 {
 317         struct brcmf_p2p_pub_act_frame *pact_frm;
 318         struct brcmf_p2p_action_frame *act_frm;
 319         struct brcmf_p2psd_gas_pub_act_frame *sd_act_frm;
 320
 321         if (!frame || frame_len <= 2)
 322                 return;
 323
 324         if (brcmf_p2p_is_pub_action(frame, frame_len)) {
 325                 pact_frm = (struct brcmf_p2p_pub_act_frame *)frame;
 326                 switch (pact_frm->subtype) {
 327                 case P2P_PAF_GON_REQ:
 328                         brcmf_dbg(TRACE, "%s P2P Group Owner Negotiation Req Frame\n",
 329                                   (tx) ? "TX" : "RX");
 330                         break;
 331                 case P2P_PAF_GON_RSP:
 332                         brcmf_dbg(TRACE, "%s P2P Group Owner Negotiation Rsp Frame\n",
 333                                   (tx) ? "TX" : "RX");
 334                         break;
 335                 case P2P_PAF_GON_CONF:
 336                         brcmf_dbg(TRACE, "%s P2P Group Owner Negotiation Confirm Frame\n",
 337                                   (tx) ? "TX" : "RX");
 338                         break;
 339                 case P2P_PAF_INVITE_REQ:
 340                         brcmf_dbg(TRACE, "%s P2P Invitation Request  Frame\n",
 341                                   (tx) ? "TX" : "RX");
 342                         break;
 343                 case P2P_PAF_INVITE_RSP:
 344                         brcmf_dbg(TRACE, "%s P2P Invitation Response Frame\n",
 345                                   (tx) ? "TX" : "RX");
 346                         break;
 347                 case P2P_PAF_DEVDIS_REQ:
 348                         brcmf_dbg(TRACE, "%s P2P Device Discoverability Request Frame\n",
 349                                   (tx) ? "TX" : "RX");
 350                         break;
 351                 case P2P_PAF_DEVDIS_RSP:
 352                         brcmf_dbg(TRACE, "%s P2P Device Discoverability Response Frame\n",
 353                                   (tx) ? "TX" : "RX");
 354                         break;
 355                 case P2P_PAF_PROVDIS_REQ:
 356                         brcmf_dbg(TRACE, "%s P2P Provision Discovery Request Frame\n",
 357                                   (tx) ? "TX" : "RX");
 358                         break;
 359                 case P2P_PAF_PROVDIS_RSP:
 360                         brcmf_dbg(TRACE, "%s P2P Provision Discovery Response Frame\n",
 361                                   (tx) ? "TX" : "RX");
 362                         break;
 363                 default:
 364                         brcmf_dbg(TRACE, "%s Unknown P2P Public Action Frame\n",
 365                                   (tx) ? "TX" : "RX");
 366                         break;
 367                 }
 368         } else if (brcmf_p2p_is_p2p_action(frame, frame_len)) {
 369                 act_frm = (struct brcmf_p2p_action_frame *)frame;
 370                 switch (act_frm->subtype) {
 371                 case P2P_AF_NOTICE_OF_ABSENCE:
 372                         brcmf_dbg(TRACE, "%s P2P Notice of Absence Frame\n",
 373                                   (tx) ? "TX" : "RX");
 374                         break;
 375                 case P2P_AF_PRESENCE_REQ:
 376                         brcmf_dbg(TRACE, "%s P2P Presence Request Frame\n",
 377                                   (tx) ? "TX" : "RX");
 378                         break;
 379                 case P2P_AF_PRESENCE_RSP:
 380                         brcmf_dbg(TRACE, "%s P2P Presence Response Frame\n",
 381                                   (tx) ? "TX" : "RX");
 382                         break;
 383                 case P2P_AF_GO_DISC_REQ:
 384                         brcmf_dbg(TRACE, "%s P2P Discoverability Request Frame\n",
 385                                   (tx) ? "TX" : "RX");
 386                         break;
 387                 default:
 388                         brcmf_dbg(TRACE, "%s Unknown P2P Action Frame\n",
 389                                   (tx) ? "TX" : "RX");
 390                 }
 391
 392         } else if (brcmf_p2p_is_gas_action(frame, frame_len)) {
 393                 sd_act_frm = (struct brcmf_p2psd_gas_pub_act_frame *)frame;
 394                 switch (sd_act_frm->action) {
 395                 case P2PSD_ACTION_ID_GAS_IREQ:
 396                         brcmf_dbg(TRACE, "%s P2P GAS Initial Request\n",
 397                                   (tx) ? "TX" : "RX");
 398                         break;
 399                 case P2PSD_ACTION_ID_GAS_IRESP:
 400                         brcmf_dbg(TRACE, "%s P2P GAS Initial Response\n",
 401                                   (tx) ? "TX" : "RX");
 402                         break;
 403                 case P2PSD_ACTION_ID_GAS_CREQ:
 404                         brcmf_dbg(TRACE, "%s P2P GAS Comback Request\n",
 405                                   (tx) ? "TX" : "RX");
 406                         break;
 407                 case P2PSD_ACTION_ID_GAS_CRESP:
 408                         brcmf_dbg(TRACE, "%s P2P GAS Comback Response\n",
 409                                   (tx) ? "TX" : "RX");
 410                         break;
 411                 default:
 412                         brcmf_dbg(TRACE, "%s Unknown P2P GAS Frame\n",
 413                                   (tx) ? "TX" : "RX");
 414                         break;
 415                 }
 416         }
 417 }
 418
 419 #else
 420
 421 static void brcmf_p2p_print_actframe(bool tx, void *frame, u32 frame_len)
 422 {
 423 }
 424
 425 #endif
 426
 427
 428 /**
 429  * brcmf_p2p_set_firmware() - prepare firmware for peer-to-peer operation.
 430  *
 431  * @ifp: ifp to use for iovars (primary).
 432  * @p2p_mac: mac address to configure for p2p_da_override
 433  */
 434 static int brcmf_p2p_set_firmware(struct brcmf_if *ifp, u8 *p2p_mac)
 435 {
 436         s32 ret = 0;
 437
 438         brcmf_fil_cmd_int_set(ifp, BRCMF_C_DOWN, 1);
 439         brcmf_fil_iovar_int_set(ifp, "apsta", 1);
 440         brcmf_fil_cmd_int_set(ifp, BRCMF_C_UP, 1);
 441
 442         /* In case of COB type, firmware has default mac address
 443          * After Initializing firmware, we have to set current mac address to
 444          * firmware for P2P device address. This must be done with discovery
 445          * disabled.
 446          */
 447         brcmf_fil_iovar_int_set(ifp, "p2p_disc", 0);
 448
 449         ret = brcmf_fil_iovar_data_set(ifp, "p2p_da_override", p2p_mac,
 450                                        ETH_ALEN);
 451         if (ret)
 452                 brcmf_err("failed to update device address ret %d\n", ret);
 453
 454         return ret;
 455 }
 456
 457 /**
 458  * brcmf_p2p_generate_bss_mac() - derive mac addresses for P2P.
 459  *
 460  * @p2p: P2P specific data.
 461  * @dev_addr: optional device address.
 462  *
 463  * P2P needs mac addresses for P2P device and interface. If no device
 464  * address it specified, these are derived from the primary net device, ie.
 465  * the permanent ethernet address of the device.
 466  */
 467 static void brcmf_p2p_generate_bss_mac(struct brcmf_p2p_info *p2p, u8 *dev_addr)
 468 {
 469         struct brcmf_if *pri_ifp = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->ifp;
 470         bool local_admin = false;
 471
 472         if (!dev_addr || is_zero_ether_addr(dev_addr)) {
 473                 dev_addr = pri_ifp->mac_addr;
 474                 local_admin = true;
 475         }
 476
 477         /* Generate the P2P Device Address.  This consists of the device's
 478          * primary MAC address with the locally administered bit set.
 479          */
 480         memcpy(p2p->dev_addr, dev_addr, ETH_ALEN);
 481         if (local_admin)
 482                 p2p->dev_addr[0] |= 0x02;
 483
 484         /* Generate the P2P Interface Address.  If the discovery and connection
 485          * BSSCFGs need to simultaneously co-exist, then this address must be
 486          * different from the P2P Device Address, but also locally administered.
 487          */
 488         memcpy(p2p->int_addr, p2p->dev_addr, ETH_ALEN);
 489         p2p->int_addr[0] |= 0x02;
 490         p2p->int_addr[4] ^= 0x80;
 491 }
 492
 493 /**
 494  * brcmf_p2p_scan_is_p2p_request() - is cfg80211 scan request a P2P scan.
 495  *
 496  * @request: the scan request as received from cfg80211.
 497  *
 498  * returns true if one of the ssids in the request matches the
 499  * P2P wildcard ssid; otherwise returns false.
 500  */
 501 static bool brcmf_p2p_scan_is_p2p_request(struct cfg80211_scan_request *request)
 502 {
 503         struct cfg80211_ssid *ssids = request->ssids;
 504         int i;
 505
 506         for (i = 0; i < request->n_ssids; i++) {
 507                 if (ssids[i].ssid_len != BRCMF_P2P_WILDCARD_SSID_LEN)
 508                         continue;
 509
 510                 brcmf_dbg(INFO, "comparing ssid \"%s\"", ssids[i].ssid);
 511                 if (!memcmp(BRCMF_P2P_WILDCARD_SSID, ssids[i].ssid,
 512                             BRCMF_P2P_WILDCARD_SSID_LEN))
 513                         return true;
 514         }
 515         return false;
 516 }
 517
 518 /**
 519  * brcmf_p2p_set_discover_state - set discover state in firmware.
 520  *
 521  * @ifp: low-level interface object.
 522  * @state: discover state to set.
 523  * @chanspec: channel parameters (for state @WL_P2P_DISC_ST_LISTEN only).
 524  * @listen_ms: duration to listen (for state @WL_P2P_DISC_ST_LISTEN only).
 525  */
 526 static s32 brcmf_p2p_set_discover_state(struct brcmf_if *ifp, u8 state,
 527                                         u16 chanspec, u16 listen_ms)
 528 {
 529         struct brcmf_p2p_disc_st_le discover_state;
 530         s32 ret = 0;
 531         brcmf_dbg(TRACE, "enter\n");
 532
 533         discover_state.state = state;
 534         discover_state.chspec = cpu_to_le16(chanspec);
 535         discover_state.dwell = cpu_to_le16(listen_ms);
 536         ret = brcmf_fil_bsscfg_data_set(ifp, "p2p_state", &discover_state,
 537                                         sizeof(discover_state));
 538         return ret;
 539 }
 540
 541 /**
 542  * brcmf_p2p_deinit_discovery() - disable P2P device discovery.
 543  *
 544  * @p2p: P2P specific data.
 545  *
 546  * Resets the discovery state and disables it in firmware.
 547  */
 548 static s32 brcmf_p2p_deinit_discovery(struct brcmf_p2p_info *p2p)
 549 {
 550         struct brcmf_cfg80211_vif *vif;
 551
 552         brcmf_dbg(TRACE, "enter\n");
 553
 554         /* Set the discovery state to SCAN */
 555         vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif;
 556         (void)brcmf_p2p_set_discover_state(vif->ifp, WL_P2P_DISC_ST_SCAN, 0, 0);
 557
 558         /* Disable P2P discovery in the firmware */
 559         vif = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif;
 560         (void)brcmf_fil_iovar_int_set(vif->ifp, "p2p_disc", 0);
 561
 562         return 0;
 563 }
 564
 565 /**
 566  * brcmf_p2p_enable_discovery() - initialize and configure discovery.
 567  *
 568  * @p2p: P2P specific data.
 569  *
 570  * Initializes the discovery device and configure the virtual interface.
 571  */
 572 static int brcmf_p2p_enable_discovery(struct brcmf_p2p_info *p2p)
 573 {
 574         struct brcmf_cfg80211_vif *vif;
 575         s32 ret = 0;
 576
 577         brcmf_dbg(TRACE, "enter\n");
 578         vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif;
 579         if (!vif) {
 580                 brcmf_err("P2P config device not available\n");
 581                 ret = -EPERM;
 582                 goto exit;
 583         }
 584
 585         if (test_bit(BRCMF_P2P_STATUS_ENABLED, &p2p->status)) {
 586                 brcmf_dbg(INFO, "P2P config device already configured\n");
 587                 goto exit;
 588         }
 589
 590         /* Re-initialize P2P Discovery in the firmware */
 591         vif = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif;
 592         ret = brcmf_fil_iovar_int_set(vif->ifp, "p2p_disc", 1);
 593         if (ret < 0) {
 594                 brcmf_err("set p2p_disc error\n");
 595                 goto exit;
 596         }
 597         vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif;
 598         ret = brcmf_p2p_set_discover_state(vif->ifp, WL_P2P_DISC_ST_SCAN, 0, 0);
 599         if (ret < 0) {
 600                 brcmf_err("unable to set WL_P2P_DISC_ST_SCAN\n");
 601                 goto exit;
 602         }
 603
 604         /*
 605          * Set wsec to any non-zero value in the discovery bsscfg
 606          * to ensure our P2P probe responses have the privacy bit
 607          * set in the 802.11 WPA IE. Some peer devices may not
 608          * initiate WPS with us if this bit is not set.
 609          */
 610         ret = brcmf_fil_bsscfg_int_set(vif->ifp, "wsec", AES_ENABLED);
 611         if (ret < 0) {
 612                 brcmf_err("wsec error %d\n", ret);
 613                 goto exit;
 614         }
 615
 616         set_bit(BRCMF_P2P_STATUS_ENABLED, &p2p->status);
 617 exit:
 618         return ret;
 619 }
 620
 621 /**
 622  * brcmf_p2p_escan() - initiate a P2P scan.
 623  *
 624  * @p2p: P2P specific data.
 625  * @num_chans: number of channels to scan.
 626  * @chanspecs: channel parameters for @num_chans channels.
 627  * @search_state: P2P discover state to use.
 628  * @action: scan action to pass to firmware.
 629  * @bss_type: type of P2P bss.
 630  */
 631 static s32 brcmf_p2p_escan(struct brcmf_p2p_info *p2p, u32 num_chans,
 632                            u16 chanspecs[], s32 search_state, u16 action,
 633                            enum p2p_bss_type bss_type)
 634 {
 635         s32 ret = 0;
 636         s32 memsize = offsetof(struct brcmf_p2p_scan_le,
 637                                eparams.params_le.channel_list);
 638         s32 nprobes;
 639         s32 active;
 640         u32 i;
 641         u8 *memblk;
 642         struct brcmf_cfg80211_vif *vif;
 643         struct brcmf_p2p_scan_le *p2p_params;
 644         struct brcmf_scan_params_le *sparams;
 645         struct brcmf_ssid ssid;
 646
 647         memsize += num_chans * sizeof(__le16);
 648         memblk = kzalloc(memsize, GFP_KERNEL);
 649         if (!memblk)
 650                 return -ENOMEM;
 651
 652         vif = p2p->bss_idx[bss_type].vif;
 653         if (vif == NULL) {
 654                 brcmf_err("no vif for bss type %d\n", bss_type);
 655                 ret = -EINVAL;
 656                 goto exit;
 657         }
 658
 659         switch (search_state) {
 660         case WL_P2P_DISC_ST_SEARCH:
 661                 /*
 662                  * If we in SEARCH STATE, we don't need to set SSID explictly
 663                  * because dongle use P2P WILDCARD internally by default
 664                  */
 665                 /* use null ssid */
 666                 ssid.SSID_len = 0;
 667                 memset(ssid.SSID, 0, sizeof(ssid.SSID));
 668                 break;
 669         case WL_P2P_DISC_ST_SCAN:
 670                 /*
 671                  * wpa_supplicant has p2p_find command with type social or
 672                  * progressive. For progressive, we need to set the ssid to
 673                  * P2P WILDCARD because we just do broadcast scan unless
 674                  * setting SSID.
 675                  */
 676                 ssid.SSID_len = BRCMF_P2P_WILDCARD_SSID_LEN;
 677                 memcpy(ssid.SSID, BRCMF_P2P_WILDCARD_SSID, ssid.SSID_len);
 678                 break;
 679         default:
 680                 brcmf_err(" invalid search state %d\n", search_state);
 681                 ret = -EINVAL;
 682                 goto exit;
 683         }
 684
 685         brcmf_p2p_set_discover_state(vif->ifp, search_state, 0, 0);
 686
 687         /*
 688          * set p2p scan parameters.
 689          */
 690         p2p_params = (struct brcmf_p2p_scan_le *)memblk;
 691         p2p_params->type = 'E';
 692
 693         /* determine the scan engine parameters */
 694         sparams = &p2p_params->eparams.params_le;
 695         sparams->bss_type = DOT11_BSSTYPE_ANY;
 696         if (p2p->cfg->active_scan)
 697                 sparams->scan_type = 0;
 698         else
 699                 sparams->scan_type = 1;
 700
 701         eth_broadcast_addr(sparams->bssid);
 702         if (ssid.SSID_len)
 703                 memcpy(sparams->ssid_le.SSID, ssid.SSID, ssid.SSID_len);
 704         sparams->ssid_le.SSID_len = cpu_to_le32(ssid.SSID_len);
 705         sparams->home_time = cpu_to_le32(P2PAPI_SCAN_HOME_TIME_MS);
 706
 707         /*
 708          * SOCIAL_CHAN_CNT + 1 takes care of the Progressive scan
 709          * supported by the supplicant.
 710          */
 711         if (num_chans == SOCIAL_CHAN_CNT || num_chans == (SOCIAL_CHAN_CNT + 1))
 712                 active = P2PAPI_SCAN_SOCIAL_DWELL_TIME_MS;
 713         else if (num_chans == AF_PEER_SEARCH_CNT)
 714                 active = P2PAPI_SCAN_AF_SEARCH_DWELL_TIME_MS;
 715         else if (brcmf_get_vif_state_any(p2p->cfg, BRCMF_VIF_STATUS_CONNECTED))
 716                 active = -1;
 717         else
 718                 active = P2PAPI_SCAN_DWELL_TIME_MS;
 719
 720         /* Override scan params to find a peer for a connection */
 721         if (num_chans == 1) {
 722                 active = WL_SCAN_CONNECT_DWELL_TIME_MS;
 723                 /* WAR to sync with presence period of VSDB GO.
 724                  * send probe request more frequently
 725                  */
 726                 nprobes = active / WL_SCAN_JOIN_PROBE_INTERVAL_MS;
 727         } else {
 728                 nprobes = active / P2PAPI_SCAN_NPROBS_TIME_MS;
 729         }
 730
 731         if (nprobes <= 0)
 732                 nprobes = 1;
 733
 734         brcmf_dbg(INFO, "nprobes # %d, active_time %d\n", nprobes, active);
 735         sparams->active_time = cpu_to_le32(active);
 736         sparams->nprobes = cpu_to_le32(nprobes);
 737         sparams->passive_time = cpu_to_le32(-1);
 738         sparams->channel_num = cpu_to_le32(num_chans &
 739                                            BRCMF_SCAN_PARAMS_COUNT_MASK);
 740         for (i = 0; i < num_chans; i++)
 741                 sparams->channel_list[i] = cpu_to_le16(chanspecs[i]);
 742
 743         /* set the escan specific parameters */
 744         p2p_params->eparams.version = cpu_to_le32(BRCMF_ESCAN_REQ_VERSION);
 745         p2p_params->eparams.action =  cpu_to_le16(action);
 746         p2p_params->eparams.sync_id = cpu_to_le16(0x1234);
 747         /* perform p2p scan on primary device */
 748         ret = brcmf_fil_bsscfg_data_set(vif->ifp, "p2p_scan", memblk, memsize);
 749         if (!ret)
 750                 set_bit(BRCMF_SCAN_STATUS_BUSY, &p2p->cfg->scan_status);
 751 exit:
 752         kfree(memblk);
 753         return ret;
 754 }
 755
 756 /**
 757  * brcmf_p2p_run_escan() - escan callback for peer-to-peer.
 758  *
 759  * @cfg: driver private data for cfg80211 interface.
 760  * @ndev: net device for which scan is requested.
 761  * @request: scan request from cfg80211.
 762  * @action: scan action.
 763  *
 764  * Determines the P2P discovery state based to scan request parameters and
 765  * validates the channels in the request.
 766  */
 767 static s32 brcmf_p2p_run_escan(struct brcmf_cfg80211_info *cfg,
 768                                struct brcmf_if *ifp,
 769                                struct cfg80211_scan_request *request,
 770                                u16 action)
 771 {
 772         struct brcmf_p2p_info *p2p = &cfg->p2p;
 773         s32 err = 0;
 774         s32 search_state = WL_P2P_DISC_ST_SCAN;
 775         struct brcmf_cfg80211_vif *vif;
 776         struct net_device *dev = NULL;
 777         int i, num_nodfs = 0;
 778         u16 *chanspecs;
 779
 780         brcmf_dbg(TRACE, "enter\n");
 781
 782         if (!request) {
 783                 err = -EINVAL;
 784                 goto exit;
 785         }
 786
 787         if (request->n_channels) {
 788                 chanspecs = kcalloc(request->n_channels, sizeof(*chanspecs),
 789                                     GFP_KERNEL);
 790                 if (!chanspecs) {
 791                         err = -ENOMEM;
 792                         goto exit;
 793                 }
 794                 vif = p2p->bss_idx[P2PAPI_BSSCFG_CONNECTION].vif;
 795                 if (vif)
 796                         dev = vif->wdev.netdev;
 797                 if (request->n_channels == 3 &&
 798                     request->channels[0]->hw_value == SOCIAL_CHAN_1 &&
 799                     request->channels[1]->hw_value == SOCIAL_CHAN_2 &&
 800                     request->channels[2]->hw_value == SOCIAL_CHAN_3) {
 801                         /* SOCIAL CHANNELS 1, 6, 11 */
 802                         search_state = WL_P2P_DISC_ST_SEARCH;
 803                         brcmf_dbg(INFO, "P2P SEARCH PHASE START\n");
 804                 } else if (dev != NULL &&
 805                            vif->wdev.iftype == NL80211_IFTYPE_P2P_GO) {
 806                         /* If you are already a GO, then do SEARCH only */
 807                         brcmf_dbg(INFO, "Already a GO. Do SEARCH Only\n");
 808                         search_state = WL_P2P_DISC_ST_SEARCH;
 809                 } else {
 810                         brcmf_dbg(INFO, "P2P SCAN STATE START\n");
 811                 }
 812
 813                 /*
 814                  * no P2P scanning on passive or DFS channels.
 815                  */
 816                 for (i = 0; i < request->n_channels; i++) {
 817                         struct ieee80211_channel *chan = request->channels[i];
 818
 819                         if (chan->flags & (IEEE80211_CHAN_RADAR |
 820                                            IEEE80211_CHAN_NO_IR))
 821                                 continue;
 822
 823                         chanspecs[i] = channel_to_chanspec(&p2p->cfg->d11inf,
 824                                                            chan);
 825                         brcmf_dbg(INFO, "%d: chan=%d, channel spec=%x\n",
 826                                   num_nodfs, chan->hw_value, chanspecs[i]);
 827                         num_nodfs++;
 828                 }
 829                 err = brcmf_p2p_escan(p2p, num_nodfs, chanspecs, search_state,
 830                                       action, P2PAPI_BSSCFG_DEVICE);
 831                 kfree(chanspecs);
 832         }
 833 exit:
 834         if (err)
 835                 brcmf_err("error (%d)\n", err);
 836         return err;
 837 }
 838
 839
 840 /**
 841  * brcmf_p2p_find_listen_channel() - find listen channel in ie string.
 842  *
 843  * @ie: string of information elements.
 844  * @ie_len: length of string.
 845  *
 846  * Scan ie for p2p ie and look for attribute 6 channel. If available determine
 847  * channel and return it.
 848  */
 849 static s32 brcmf_p2p_find_listen_channel(const u8 *ie, u32 ie_len)
 850 {
 851         u8 channel_ie[5];
 852         s32 listen_channel;
 853         s32 err;
 854
 855         err = cfg80211_get_p2p_attr(ie, ie_len,
 856                                     IEEE80211_P2P_ATTR_LISTEN_CHANNEL,
 857                                     channel_ie, sizeof(channel_ie));
 858         if (err < 0)
 859                 return err;
 860
 861         /* listen channel subel length format:     */
 862         /* 3(country) + 1(op. class) + 1(chan num) */
 863         listen_channel = (s32)channel_ie[3 + 1];
 864
 865         if (listen_channel == SOCIAL_CHAN_1 ||
 866             listen_channel == SOCIAL_CHAN_2 ||
 867             listen_channel == SOCIAL_CHAN_3) {
 868                 brcmf_dbg(INFO, "Found my Listen Channel %d\n", listen_channel);
 869                 return listen_channel;
 870         }
 871
 872         return -EPERM;
 873 }
 874
 875
 876 /**
 877  * brcmf_p2p_scan_prep() - prepare scan based on request.
 878  *
 879  * @wiphy: wiphy device.
 880  * @request: scan request from cfg80211.
 881  * @vif: vif on which scan request is to be executed.
 882  *
 883  * Prepare the scan appropriately for type of scan requested. Overrides the
 884  * escan .run() callback for peer-to-peer scanning.
 885  */
 886 int brcmf_p2p_scan_prep(struct wiphy *wiphy,
 887                         struct cfg80211_scan_request *request,
 888                         struct brcmf_cfg80211_vif *vif)
 889 {
 890         struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
 891         struct brcmf_p2p_info *p2p = &cfg->p2p;
 892         int err = 0;
 893
 894         if (brcmf_p2p_scan_is_p2p_request(request)) {
 895                 /* find my listen channel */
 896                 err = brcmf_p2p_find_listen_channel(request->ie,
 897                                                     request->ie_len);
 898                 if (err < 0)
 899                         return err;
 900
 901                 p2p->afx_hdl.my_listen_chan = err;
 902
 903                 clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status);
 904                 brcmf_dbg(INFO, "P2P: GO_NEG_PHASE status cleared\n");
 905
 906                 err = brcmf_p2p_enable_discovery(p2p);
 907                 if (err)
 908                         return err;
 909
 910                 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif;
 911
 912                 /* override .run_escan() callback. */
 913                 cfg->escan_info.run = brcmf_p2p_run_escan;
 914         }
 915         err = brcmf_vif_set_mgmt_ie(vif, BRCMF_VNDR_IE_PRBREQ_FLAG,
 916                                     request->ie, request->ie_len);
 917         return err;
 918 }
 919
 920
 921 /**
 922  * brcmf_p2p_discover_listen() - set firmware to discover listen state.
 923  *
 924  * @p2p: p2p device.
 925  * @channel: channel nr for discover listen.
 926  * @duration: time in ms to stay on channel.
 927  *
 928  */
 929 static s32
 930 brcmf_p2p_discover_listen(struct brcmf_p2p_info *p2p, u16 channel, u32 duration)
 931 {
 932         struct brcmf_cfg80211_vif *vif;
 933         struct brcmu_chan ch;
 934         s32 err = 0;
 935
 936         vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif;
 937         if (!vif) {
 938                 brcmf_err("Discovery is not set, so we have nothing to do\n");
 939                 err = -EPERM;
 940                 goto exit;
 941         }
 942
 943         if (test_bit(BRCMF_P2P_STATUS_DISCOVER_LISTEN, &p2p->status)) {
 944                 brcmf_err("Previous LISTEN is not completed yet\n");
 945                 /* WAR: prevent cookie mismatch in wpa_supplicant return OK */
 946                 goto exit;
 947         }
 948
 949         ch.chnum = channel;
 950         ch.bw = BRCMU_CHAN_BW_20;
 951         p2p->cfg->d11inf.encchspec(&ch);
 952         err = brcmf_p2p_set_discover_state(vif->ifp, WL_P2P_DISC_ST_LISTEN,
 953                                            ch.chspec, (u16)duration);
 954         if (!err) {
 955                 set_bit(BRCMF_P2P_STATUS_DISCOVER_LISTEN, &p2p->status);
 956                 p2p->remain_on_channel_cookie++;
 957         }
 958 exit:
 959         return err;
 960 }
 961
 962
 963 /**
 964  * brcmf_p2p_remain_on_channel() - put device on channel and stay there.
 965  *
 966  * @wiphy: wiphy device.
 967  * @channel: channel to stay on.
 968  * @duration: time in ms to remain on channel.
 969  *
 970  */
 971 int brcmf_p2p_remain_on_channel(struct wiphy *wiphy, struct wireless_dev *wdev,
 972                                 struct ieee80211_channel *channel,
 973                                 unsigned int duration, u64 *cookie)
 974 {
 975         struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
 976         struct brcmf_p2p_info *p2p = &cfg->p2p;
 977         s32 err;
 978         u16 channel_nr;
 979
 980         channel_nr = ieee80211_frequency_to_channel(channel->center_freq);
 981         brcmf_dbg(TRACE, "Enter, channel: %d, duration ms (%d)\n", channel_nr,
 982                   duration);
 983
 984         err = brcmf_p2p_enable_discovery(p2p);
 985         if (err)
 986                 goto exit;
 987         err = brcmf_p2p_discover_listen(p2p, channel_nr, duration);
 988         if (err)
 989                 goto exit;
 990
 991         memcpy(&p2p->remain_on_channel, channel, sizeof(*channel));
 992         *cookie = p2p->remain_on_channel_cookie;
 993         cfg80211_ready_on_channel(wdev, *cookie, channel, duration, GFP_KERNEL);
 994
 995 exit:
 996         return err;
 997 }
 998
 999
1000 /**
1001  * brcmf_p2p_notify_listen_complete() - p2p listen has completed.
1002  *
1003  * @ifp: interfac control.
1004  * @e: event message. Not used, to make it usable for fweh event dispatcher.
1005  * @data: payload of message. Not used.
1006  *
1007  */
1008 int brcmf_p2p_notify_listen_complete(struct brcmf_if *ifp,
1009                                      const struct brcmf_event_msg *e,
1010                                      void *data)
1011 {
1012         struct brcmf_cfg80211_info *cfg = ifp->drvr->config;
1013         struct brcmf_p2p_info *p2p = &cfg->p2p;
1014
1015         brcmf_dbg(TRACE, "Enter\n");
1016         if (test_and_clear_bit(BRCMF_P2P_STATUS_DISCOVER_LISTEN,
1017                                &p2p->status)) {
1018                 if (test_and_clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_AF_LISTEN,
1019                                        &p2p->status)) {
1020                         clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME,
1021                                   &p2p->status);
1022                         brcmf_dbg(INFO, "Listen DONE, wake up wait_next_af\n");
1023                         complete(&p2p->wait_next_af);
1024                 }
1025
1026                 cfg80211_remain_on_channel_expired(&ifp->vif->wdev,
1027                                                    p2p->remain_on_channel_cookie,
1028                                                    &p2p->remain_on_channel,
1029                                                    GFP_KERNEL);
1030         }
1031         return 0;
1032 }
1033
1034
1035 /**
1036  * brcmf_p2p_cancel_remain_on_channel() - cancel p2p listen state.
1037  *
1038  * @ifp: interfac control.
1039  *
1040  */
1041 void brcmf_p2p_cancel_remain_on_channel(struct brcmf_if *ifp)
1042 {
1043         if (!ifp)
1044                 return;
1045         brcmf_p2p_set_discover_state(ifp, WL_P2P_DISC_ST_SCAN, 0, 0);
1046         brcmf_p2p_notify_listen_complete(ifp, NULL, NULL);
1047 }
1048
1049
1050 /**
1051  * brcmf_p2p_act_frm_search() - search function for action frame.
1052  *
1053  * @p2p: p2p device.
1054  * channel: channel on which action frame is to be trasmitted.
1055  *
1056  * search function to reach at common channel to send action frame. When
1057  * channel is 0 then all social channels will be used to send af
1058  */
1059 static s32 brcmf_p2p_act_frm_search(struct brcmf_p2p_info *p2p, u16 channel)
1060 {
1061         s32 err;
1062         u32 channel_cnt;
1063         u16 *default_chan_list;
1064         u32 i;
1065         struct brcmu_chan ch;
1066
1067         brcmf_dbg(TRACE, "Enter\n");
1068
1069         if (channel)
1070                 channel_cnt = AF_PEER_SEARCH_CNT;
1071         else
1072                 channel_cnt = SOCIAL_CHAN_CNT;
1073         default_chan_list = kzalloc(channel_cnt * sizeof(*default_chan_list),
1074                                     GFP_KERNEL);
1075         if (default_chan_list == NULL) {
1076                 brcmf_err("channel list allocation failed\n");
1077                 err = -ENOMEM;
1078                 goto exit;
1079         }
1080         ch.bw = BRCMU_CHAN_BW_20;
1081         if (channel) {
1082                 ch.chnum = channel;
1083                 p2p->cfg->d11inf.encchspec(&ch);
1084                 /* insert same channel to the chan_list */
1085                 for (i = 0; i < channel_cnt; i++)
1086                         default_chan_list[i] = ch.chspec;
1087         } else {
1088                 ch.chnum = SOCIAL_CHAN_1;
1089                 p2p->cfg->d11inf.encchspec(&ch);
1090                 default_chan_list[0] = ch.chspec;
1091                 ch.chnum = SOCIAL_CHAN_2;
1092                 p2p->cfg->d11inf.encchspec(&ch);
1093                 default_chan_list[1] = ch.chspec;
1094                 ch.chnum = SOCIAL_CHAN_3;
1095                 p2p->cfg->d11inf.encchspec(&ch);
1096                 default_chan_list[2] = ch.chspec;
1097         }
1098         err = brcmf_p2p_escan(p2p, channel_cnt, default_chan_list,
1099                               WL_P2P_DISC_ST_SEARCH, WL_ESCAN_ACTION_START,
1100                               P2PAPI_BSSCFG_DEVICE);
1101         kfree(default_chan_list);
1102 exit:
1103         return err;
1104 }
1105
1106
1107 /**
1108  * brcmf_p2p_afx_handler() - afx worker thread.
1109  *
1110  * @work:
1111  *
1112  */
1113 static void brcmf_p2p_afx_handler(struct work_struct *work)
1114 {
1115         struct afx_hdl *afx_hdl = container_of(work, struct afx_hdl, afx_work);
1116         struct brcmf_p2p_info *p2p = container_of(afx_hdl,
1117                                                   struct brcmf_p2p_info,
1118                                                   afx_hdl);
1119         s32 err;
1120
1121         if (!afx_hdl->is_active)
1122                 return;
1123
1124         if (afx_hdl->is_listen && afx_hdl->my_listen_chan)
1125                 /* 100ms ~ 300ms */
1126                 err = brcmf_p2p_discover_listen(p2p, afx_hdl->my_listen_chan,
1127                                                 100 * (1 + prandom_u32() % 3));
1128         else
1129                 err = brcmf_p2p_act_frm_search(p2p, afx_hdl->peer_listen_chan);
1130
1131         if (err) {
1132                 brcmf_err("ERROR occurred! value is (%d)\n", err);
1133                 if (test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL,
1134                              &p2p->status))
1135                         complete(&afx_hdl->act_frm_scan);
1136         }
1137 }
1138
1139
1140 /**
1141  * brcmf_p2p_af_searching_channel() - search channel.
1142  *
1143  * @p2p: p2p device info struct.
1144  *
1145  */
1146 static s32 brcmf_p2p_af_searching_channel(struct brcmf_p2p_info *p2p)
1147 {
1148         struct afx_hdl *afx_hdl = &p2p->afx_hdl;
1149         struct brcmf_cfg80211_vif *pri_vif;
1150         unsigned long duration;
1151         s32 retry;
1152
1153         brcmf_dbg(TRACE, "Enter\n");
1154
1155         pri_vif = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif;
1156
1157         reinit_completion(&afx_hdl->act_frm_scan);
1158         set_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status);
1159         afx_hdl->is_active = true;
1160         afx_hdl->peer_chan = P2P_INVALID_CHANNEL;
1161
1162         /* Loop to wait until we find a peer's channel or the
1163          * pending action frame tx is cancelled.
1164          */
1165         retry = 0;
1166         duration = msecs_to_jiffies(P2P_AF_FRM_SCAN_MAX_WAIT);
1167         while ((retry < P2P_CHANNEL_SYNC_RETRY) &&
1168                (afx_hdl->peer_chan == P2P_INVALID_CHANNEL)) {
1169                 afx_hdl->is_listen = false;
1170                 brcmf_dbg(TRACE, "Scheduling action frame for sending.. (%d)\n",
1171                           retry);
1172                 /* search peer on peer's listen channel */
1173                 schedule_work(&afx_hdl->afx_work);
1174                 wait_for_completion_timeout(&afx_hdl->act_frm_scan, duration);
1175                 if ((afx_hdl->peer_chan != P2P_INVALID_CHANNEL) ||
1176                     (!test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL,
1177                                &p2p->status)))
1178                         break;
1179
1180                 if (afx_hdl->my_listen_chan) {
1181                         brcmf_dbg(TRACE, "Scheduling listen peer, channel=%d\n",
1182                                   afx_hdl->my_listen_chan);
1183                         /* listen on my listen channel */
1184                         afx_hdl->is_listen = true;
1185                         schedule_work(&afx_hdl->afx_work);
1186                         wait_for_completion_timeout(&afx_hdl->act_frm_scan,
1187                                                     duration);
1188                 }
1189                 if ((afx_hdl->peer_chan != P2P_INVALID_CHANNEL) ||
1190                     (!test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL,
1191                                &p2p->status)))
1192                         break;
1193                 retry++;
1194
1195                 /* if sta is connected or connecting, sleep for a while before
1196                  * retry af tx or finding a peer
1197                  */
1198                 if (test_bit(BRCMF_VIF_STATUS_CONNECTED, &pri_vif->sme_state) ||
1199                     test_bit(BRCMF_VIF_STATUS_CONNECTING, &pri_vif->sme_state))
1200                         msleep(P2P_DEFAULT_SLEEP_TIME_VSDB);
1201         }
1202
1203         brcmf_dbg(TRACE, "Completed search/listen peer_chan=%d\n",
1204                   afx_hdl->peer_chan);
1205         afx_hdl->is_active = false;
1206
1207         clear_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status);
1208
1209         return afx_hdl->peer_chan;
1210 }
1211
1212
1213 /**
1214  * brcmf_p2p_scan_finding_common_channel() - was escan used for finding channel
1215  *
1216  * @cfg: common configuration struct.
1217  * @bi: bss info struct, result from scan.
1218  *
1219  */
1220 bool brcmf_p2p_scan_finding_common_channel(struct brcmf_cfg80211_info *cfg,
1221                                            struct brcmf_bss_info_le *bi)
1222
1223 {
1224         struct brcmf_p2p_info *p2p = &cfg->p2p;
1225         struct afx_hdl *afx_hdl = &p2p->afx_hdl;
1226         struct brcmu_chan ch;
1227         u8 *ie;
1228         s32 err;
1229         u8 p2p_dev_addr[ETH_ALEN];
1230
1231         if (!test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status))
1232                 return false;
1233
1234         if (bi == NULL) {
1235                 brcmf_dbg(TRACE, "ACTION FRAME SCAN Done\n");
1236                 if (afx_hdl->peer_chan == P2P_INVALID_CHANNEL)
1237                         complete(&afx_hdl->act_frm_scan);
1238                 return true;
1239         }
1240
1241         ie = ((u8 *)bi) + le16_to_cpu(bi->ie_offset);
1242         memset(p2p_dev_addr, 0, sizeof(p2p_dev_addr));
1243         err = cfg80211_get_p2p_attr(ie, le32_to_cpu(bi->ie_length),
1244                                     IEEE80211_P2P_ATTR_DEVICE_INFO,
1245                                     p2p_dev_addr, sizeof(p2p_dev_addr));
1246         if (err < 0)
1247                 err = cfg80211_get_p2p_attr(ie, le32_to_cpu(bi->ie_length),
1248                                             IEEE80211_P2P_ATTR_DEVICE_ID,
1249                                             p2p_dev_addr, sizeof(p2p_dev_addr));
1250         if ((err >= 0) &&
1251             (ether_addr_equal(p2p_dev_addr, afx_hdl->tx_dst_addr))) {
1252                 if (!bi->ctl_ch) {
1253                         ch.chspec = le16_to_cpu(bi->chanspec);
1254                         cfg->d11inf.decchspec(&ch);
1255                         bi->ctl_ch = ch.chnum;
1256                 }
1257                 afx_hdl->peer_chan = bi->ctl_ch;
1258                 brcmf_dbg(TRACE, "ACTION FRAME SCAN : Peer %pM found, channel : %d\n",
1259                           afx_hdl->tx_dst_addr, afx_hdl->peer_chan);
1260                 complete(&afx_hdl->act_frm_scan);
1261         }
1262         return true;
1263 }
1264
1265 /**
1266  * brcmf_p2p_stop_wait_next_action_frame() - finish scan if af tx complete.
1267  *
1268  * @cfg: common configuration struct.
1269  *
1270  */
1271 static void
1272 brcmf_p2p_stop_wait_next_action_frame(struct brcmf_cfg80211_info *cfg)
1273 {
1274         struct brcmf_p2p_info *p2p = &cfg->p2p;
1275         struct brcmf_if *ifp = cfg->escan_info.ifp;
1276
1277         if (test_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status) &&
1278             (test_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status) ||
1279              test_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status))) {
1280                 brcmf_dbg(TRACE, "*** Wake UP ** abort actframe iovar\n");
1281                 /* if channel is not zero, "actfame" uses off channel scan.
1282                  * So abort scan for off channel completion.
1283                  */
1284                 if (p2p->af_sent_channel)
1285                         brcmf_notify_escan_complete(cfg, ifp, true, true);
1286         } else if (test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_AF_LISTEN,
1287                             &p2p->status)) {
1288                 brcmf_dbg(TRACE, "*** Wake UP ** abort listen for next af frame\n");
1289                 /* So abort scan to cancel listen */
1290                 brcmf_notify_escan_complete(cfg, ifp, true, true);
1291         }
1292 }
1293
1294
1295 /**
1296  * brcmf_p2p_gon_req_collision() - Check if go negotiaton collission
1297  *
1298  * @p2p: p2p device info struct.
1299  *
1300  * return true if recevied action frame is to be dropped.
1301  */
1302 static bool
1303 brcmf_p2p_gon_req_collision(struct brcmf_p2p_info *p2p, u8 *mac)
1304 {
1305         struct brcmf_cfg80211_info *cfg = p2p->cfg;
1306         struct brcmf_if *ifp;
1307
1308         brcmf_dbg(TRACE, "Enter\n");
1309
1310         if (!test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status) ||
1311             !p2p->gon_req_action)
1312                 return false;
1313
1314         brcmf_dbg(TRACE, "GO Negotiation Request COLLISION !!!\n");
1315         /* if sa(peer) addr is less than da(my) addr, then this device
1316          * process peer's gon request and block to send gon req.
1317          * if not (sa addr > da addr),
1318          * this device will process gon request and drop gon req of peer.
1319          */
1320         ifp = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif->ifp;
1321         if (memcmp(mac, ifp->mac_addr, ETH_ALEN) < 0) {
1322                 brcmf_dbg(INFO, "Block transmit gon req !!!\n");
1323                 p2p->block_gon_req_tx = true;
1324                 /* if we are finding a common channel for sending af,
1325                  * do not scan more to block to send current gon req
1326                  */
1327                 if (test_and_clear_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL,
1328                                        &p2p->status))
1329                         complete(&p2p->afx_hdl.act_frm_scan);
1330                 if (test_and_clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME,
1331                                        &p2p->status))
1332                         brcmf_p2p_stop_wait_next_action_frame(cfg);
1333                 return false;
1334         }
1335
1336         /* drop gon request of peer to process gon request by this device. */
1337         brcmf_dbg(INFO, "Drop received gon req !!!\n");
1338
1339         return true;
1340 }
1341
1342
1343 /**
1344  * brcmf_p2p_notify_action_frame_rx() - received action frame.
1345  *
1346  * @ifp: interfac control.
1347  * @e: event message. Not used, to make it usable for fweh event dispatcher.
1348  * @data: payload of message, containing action frame data.
1349  *
1350  */
1351 int brcmf_p2p_notify_action_frame_rx(struct brcmf_if *ifp,
1352                                      const struct brcmf_event_msg *e,
1353                                      void *data)
1354 {
1355         struct brcmf_cfg80211_info *cfg = ifp->drvr->config;
1356         struct brcmf_p2p_info *p2p = &cfg->p2p;
1357         struct afx_hdl *afx_hdl = &p2p->afx_hdl;
1358         struct wireless_dev *wdev;
1359         u32 mgmt_frame_len = e->datalen - sizeof(struct brcmf_rx_mgmt_data);
1360         struct brcmf_rx_mgmt_data *rxframe = (struct brcmf_rx_mgmt_data *)data;
1361         u8 *frame = (u8 *)(rxframe + 1);
1362         struct brcmf_p2p_pub_act_frame *act_frm;
1363         struct brcmf_p2psd_gas_pub_act_frame *sd_act_frm;
1364         struct brcmu_chan ch;
1365         struct ieee80211_mgmt *mgmt_frame;
1366         s32 freq;
1367         u16 mgmt_type;
1368         u8 action;
1369
1370         ch.chspec = be16_to_cpu(rxframe->chanspec);
1371         cfg->d11inf.decchspec(&ch);
1372         /* Check if wpa_supplicant has registered for this frame */
1373         brcmf_dbg(INFO, "ifp->vif->mgmt_rx_reg %04x\n", ifp->vif->mgmt_rx_reg);
1374         mgmt_type = (IEEE80211_STYPE_ACTION & IEEE80211_FCTL_STYPE) >> 4;
1375         if ((ifp->vif->mgmt_rx_reg & BIT(mgmt_type)) == 0)
1376                 return 0;
1377
1378         brcmf_p2p_print_actframe(false, frame, mgmt_frame_len);
1379
1380         action = P2P_PAF_SUBTYPE_INVALID;
1381         if (brcmf_p2p_is_pub_action(frame, mgmt_frame_len)) {
1382                 act_frm = (struct brcmf_p2p_pub_act_frame *)frame;
1383                 action = act_frm->subtype;
1384                 if ((action == P2P_PAF_GON_REQ) &&
1385                     (brcmf_p2p_gon_req_collision(p2p, (u8 *)e->addr))) {
1386                         if (test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL,
1387                                      &p2p->status) &&
1388                             (ether_addr_equal(afx_hdl->tx_dst_addr, e->addr))) {
1389                                 afx_hdl->peer_chan = ch.chnum;
1390                                 brcmf_dbg(INFO, "GON request: Peer found, channel=%d\n",
1391                                           afx_hdl->peer_chan);
1392                                 complete(&afx_hdl->act_frm_scan);
1393                         }
1394                         return 0;
1395                 }
1396                 /* After complete GO Negotiation, roll back to mpc mode */
1397                 if ((action == P2P_PAF_GON_CONF) ||
1398                     (action == P2P_PAF_PROVDIS_RSP))
1399                         brcmf_set_mpc(ifp, 1);
1400                 if (action == P2P_PAF_GON_CONF) {
1401                         brcmf_dbg(TRACE, "P2P: GO_NEG_PHASE status cleared\n");
1402                         clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status);
1403                 }
1404         } else if (brcmf_p2p_is_gas_action(frame, mgmt_frame_len)) {
1405                 sd_act_frm = (struct brcmf_p2psd_gas_pub_act_frame *)frame;
1406                 action = sd_act_frm->action;
1407         }
1408
1409         if (test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status) &&
1410             (p2p->next_af_subtype == action)) {
1411                 brcmf_dbg(TRACE, "We got a right next frame! (%d)\n", action);
1412                 clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME,
1413                           &p2p->status);
1414                 /* Stop waiting for next AF. */
1415                 brcmf_p2p_stop_wait_next_action_frame(cfg);
1416         }
1417
1418         mgmt_frame = kzalloc(offsetof(struct ieee80211_mgmt, u) +
1419                              mgmt_frame_len, GFP_KERNEL);
1420         if (!mgmt_frame) {
1421                 brcmf_err("No memory available for action frame\n");
1422                 return -ENOMEM;
1423         }
1424         memcpy(mgmt_frame->da, ifp->mac_addr, ETH_ALEN);
1425         brcmf_fil_cmd_data_get(ifp, BRCMF_C_GET_BSSID, mgmt_frame->bssid,
1426                                ETH_ALEN);
1427         memcpy(mgmt_frame->sa, e->addr, ETH_ALEN);
1428         mgmt_frame->frame_control = cpu_to_le16(IEEE80211_STYPE_ACTION);
1429         memcpy(&mgmt_frame->u, frame, mgmt_frame_len);
1430         mgmt_frame_len += offsetof(struct ieee80211_mgmt, u);
1431
1432         freq = ieee80211_channel_to_frequency(ch.chnum,
1433                                               ch.band == BRCMU_CHAN_BAND_2G ?
1434                                               IEEE80211_BAND_2GHZ :
1435                                               IEEE80211_BAND_5GHZ);
1436
1437         wdev = &ifp->vif->wdev;
1438         cfg80211_rx_mgmt(wdev, freq, 0, (u8 *)mgmt_frame, mgmt_frame_len, 0);
1439
1440         kfree(mgmt_frame);
1441         return 0;
1442 }
1443
1444
1445 /**
1446  * brcmf_p2p_notify_action_tx_complete() - transmit action frame complete
1447  *
1448  * @ifp: interfac control.
1449  * @e: event message. Not used, to make it usable for fweh event dispatcher.
1450  * @data: not used.
1451  *
1452  */
1453 int brcmf_p2p_notify_action_tx_complete(struct brcmf_if *ifp,
1454                                         const struct brcmf_event_msg *e,
1455                                         void *data)
1456 {
1457         struct brcmf_cfg80211_info *cfg = ifp->drvr->config;
1458         struct brcmf_p2p_info *p2p = &cfg->p2p;
1459
1460         brcmf_dbg(INFO, "Enter: event %s, status=%d\n",
1461                   e->event_code == BRCMF_E_ACTION_FRAME_OFF_CHAN_COMPLETE ?
1462                   "ACTION_FRAME_OFF_CHAN_COMPLETE" : "ACTION_FRAME_COMPLETE",
1463                   e->status);
1464
1465         if (!test_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status))
1466                 return 0;
1467
1468         if (e->event_code == BRCMF_E_ACTION_FRAME_COMPLETE) {
1469                 if (e->status == BRCMF_E_STATUS_SUCCESS)
1470                         set_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED,
1471                                 &p2p->status);
1472                 else {
1473                         set_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status);
1474                         /* If there is no ack, we don't need to wait for
1475                          * WLC_E_ACTION_FRAME_OFFCHAN_COMPLETE event
1476                          */
1477                         brcmf_p2p_stop_wait_next_action_frame(cfg);
1478                 }
1479
1480         } else {
1481                 complete(&p2p->send_af_done);
1482         }
1483         return 0;
1484 }
1485
1486
1487 /**
1488  * brcmf_p2p_tx_action_frame() - send action frame over fil.
1489  *
1490  * @p2p: p2p info struct for vif.
1491  * @af_params: action frame data/info.
1492  *
1493  * Send an action frame immediately without doing channel synchronization.
1494  *
1495  * This function waits for a completion event before returning.
1496  * The WLC_E_ACTION_FRAME_COMPLETE event will be received when the action
1497  * frame is transmitted.
1498  */
1499 static s32 brcmf_p2p_tx_action_frame(struct brcmf_p2p_info *p2p,
1500                                      struct brcmf_fil_af_params_le *af_params)
1501 {
1502         struct brcmf_cfg80211_vif *vif;
1503         s32 err = 0;
1504         s32 timeout = 0;
1505
1506         brcmf_dbg(TRACE, "Enter\n");
1507
1508         reinit_completion(&p2p->send_af_done);
1509         clear_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status);
1510         clear_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status);
1511
1512         vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif;
1513         err = brcmf_fil_bsscfg_data_set(vif->ifp, "actframe", af_params,
1514                                         sizeof(*af_params));
1515         if (err) {
1516                 brcmf_err(" sending action frame has failed\n");
1517                 goto exit;
1518         }
1519
1520         p2p->af_sent_channel = le32_to_cpu(af_params->channel);
1521         p2p->af_tx_sent_jiffies = jiffies;
1522
1523         timeout = wait_for_completion_timeout(&p2p->send_af_done,
1524                                         msecs_to_jiffies(P2P_AF_MAX_WAIT_TIME));
1525
1526         if (test_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status)) {
1527                 brcmf_dbg(TRACE, "TX action frame operation is success\n");
1528         } else {
1529                 err = -EIO;
1530                 brcmf_dbg(TRACE, "TX action frame operation has failed\n");
1531         }
1532         /* clear status bit for action tx */
1533         clear_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status);
1534         clear_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status);
1535
1536 exit:
1537         return err;
1538 }
1539
1540
1541 /**
1542  * brcmf_p2p_pub_af_tx() - public action frame tx routine.
1543  *
1544  * @cfg: driver private data for cfg80211 interface.
1545  * @af_params: action frame data/info.
1546  * @config_af_params: configuration data for action frame.
1547  *
1548  * routine which transmits ation frame public type.
1549  */
1550 static s32 brcmf_p2p_pub_af_tx(struct brcmf_cfg80211_info *cfg,
1551                                struct brcmf_fil_af_params_le *af_params,
1552                                struct brcmf_config_af_params *config_af_params)
1553 {
1554         struct brcmf_p2p_info *p2p = &cfg->p2p;
1555         struct brcmf_fil_action_frame_le *action_frame;
1556         struct brcmf_p2p_pub_act_frame *act_frm;
1557         s32 err = 0;
1558         u16 ie_len;
1559
1560         action_frame = &af_params->action_frame;
1561         act_frm = (struct brcmf_p2p_pub_act_frame *)(action_frame->data);
1562
1563         config_af_params->extra_listen = true;
1564
1565         switch (act_frm->subtype) {
1566         case P2P_PAF_GON_REQ:
1567                 brcmf_dbg(TRACE, "P2P: GO_NEG_PHASE status set\n");
1568                 set_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status);
1569                 config_af_params->mpc_onoff = 0;
1570                 config_af_params->search_channel = true;
1571                 p2p->next_af_subtype = act_frm->subtype + 1;
1572                 p2p->gon_req_action = true;
1573                 /* increase dwell time to wait for RESP frame */
1574                 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME);
1575                 break;
1576         case P2P_PAF_GON_RSP:
1577                 p2p->next_af_subtype = act_frm->subtype + 1;
1578                 /* increase dwell time to wait for CONF frame */
1579                 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME);
1580                 break;
1581         case P2P_PAF_GON_CONF:
1582                 /* If we reached till GO Neg confirmation reset the filter */
1583                 brcmf_dbg(TRACE, "P2P: GO_NEG_PHASE status cleared\n");
1584                 clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status);
1585                 /* turn on mpc again if go nego is done */
1586                 config_af_params->mpc_onoff = 1;
1587                 /* minimize dwell time */
1588                 af_params->dwell_time = cpu_to_le32(P2P_AF_MIN_DWELL_TIME);
1589                 config_af_params->extra_listen = false;
1590                 break;
1591         case P2P_PAF_INVITE_REQ:
1592                 config_af_params->search_channel = true;
1593                 p2p->next_af_subtype = act_frm->subtype + 1;
1594                 /* increase dwell time */
1595                 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME);
1596                 break;
1597         case P2P_PAF_INVITE_RSP:
1598                 /* minimize dwell time */
1599                 af_params->dwell_time = cpu_to_le32(P2P_AF_MIN_DWELL_TIME);
1600                 config_af_params->extra_listen = false;
1601                 break;
1602         case P2P_PAF_DEVDIS_REQ:
1603                 config_af_params->search_channel = true;
1604                 p2p->next_af_subtype = act_frm->subtype + 1;
1605                 /* maximize dwell time to wait for RESP frame */
1606                 af_params->dwell_time = cpu_to_le32(P2P_AF_LONG_DWELL_TIME);
1607                 break;
1608         case P2P_PAF_DEVDIS_RSP:
1609                 /* minimize dwell time */
1610                 af_params->dwell_time = cpu_to_le32(P2P_AF_MIN_DWELL_TIME);
1611                 config_af_params->extra_listen = false;
1612                 break;
1613         case P2P_PAF_PROVDIS_REQ:
1614                 ie_len = le16_to_cpu(action_frame->len) -
1615                          offsetof(struct brcmf_p2p_pub_act_frame, elts);
1616                 if (cfg80211_get_p2p_attr(&act_frm->elts[0], ie_len,
1617                                           IEEE80211_P2P_ATTR_GROUP_ID,
1618                                           NULL, 0) < 0)
1619                         config_af_params->search_channel = true;
1620                 config_af_params->mpc_onoff = 0;
1621                 p2p->next_af_subtype = act_frm->subtype + 1;
1622                 /* increase dwell time to wait for RESP frame */
1623                 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME);
1624                 break;
1625         case P2P_PAF_PROVDIS_RSP:
1626                 /* wpa_supplicant send go nego req right after prov disc */
1627                 p2p->next_af_subtype = P2P_PAF_GON_REQ;
1628                 /* increase dwell time to MED level */
1629                 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME);
1630                 config_af_params->extra_listen = false;
1631                 break;
1632         default:
1633                 brcmf_err("Unknown p2p pub act frame subtype: %d\n",
1634                           act_frm->subtype);
1635                 err = -EINVAL;
1636         }
1637         return err;
1638 }
1639
1640 /**
1641  * brcmf_p2p_send_action_frame() - send action frame .
1642  *
1643  * @cfg: driver private data for cfg80211 interface.
1644  * @ndev: net device to transmit on.
1645  * @af_params: configuration data for action frame.
1646  */
1647 bool brcmf_p2p_send_action_frame(struct brcmf_cfg80211_info *cfg,
1648                                  struct net_device *ndev,
1649                                  struct brcmf_fil_af_params_le *af_params)
1650 {
1651         struct brcmf_p2p_info *p2p = &cfg->p2p;
1652         struct brcmf_if *ifp = netdev_priv(ndev);
1653         struct brcmf_fil_action_frame_le *action_frame;
1654         struct brcmf_config_af_params config_af_params;
1655         struct afx_hdl *afx_hdl = &p2p->afx_hdl;
1656         u16 action_frame_len;
1657         bool ack = false;
1658         u8 category;
1659         u8 action;
1660         s32 tx_retry;
1661         s32 extra_listen_time;
1662         uint delta_ms;
1663
1664         action_frame = &af_params->action_frame;
1665         action_frame_len = le16_to_cpu(action_frame->len);
1666
1667         brcmf_p2p_print_actframe(true, action_frame->data, action_frame_len);
1668
1669         /* Add the default dwell time. Dwell time to stay off-channel */
1670         /* to wait for a response action frame after transmitting an  */
1671         /* GO Negotiation action frame                                */
1672         af_params->dwell_time = cpu_to_le32(P2P_AF_DWELL_TIME);
1673
1674         category = action_frame->data[DOT11_ACTION_CAT_OFF];
1675         action = action_frame->data[DOT11_ACTION_ACT_OFF];
1676
1677         /* initialize variables */
1678         p2p->next_af_subtype = P2P_PAF_SUBTYPE_INVALID;
1679         p2p->gon_req_action = false;
1680
1681         /* config parameters */
1682         config_af_params.mpc_onoff = -1;
1683         config_af_params.search_channel = false;
1684         config_af_params.extra_listen = false;
1685
1686         if (brcmf_p2p_is_pub_action(action_frame->data, action_frame_len)) {
1687                 /* p2p public action frame process */
1688                 if (brcmf_p2p_pub_af_tx(cfg, af_params, &config_af_params)) {
1689                         /* Just send unknown subtype frame with */
1690                         /* default parameters.                  */
1691                         brcmf_err("P2P Public action frame, unknown subtype.\n");
1692                 }
1693         } else if (brcmf_p2p_is_gas_action(action_frame->data,
1694                                            action_frame_len)) {
1695                 /* service discovery process */
1696                 if (action == P2PSD_ACTION_ID_GAS_IREQ ||
1697                     action == P2PSD_ACTION_ID_GAS_CREQ) {
1698                         /* configure service discovery query frame */
1699                         config_af_params.search_channel = true;
1700
1701                         /* save next af suptype to cancel */
1702                         /* remaining dwell time           */
1703                         p2p->next_af_subtype = action + 1;
1704
1705                         af_params->dwell_time =
1706                                 cpu_to_le32(P2P_AF_MED_DWELL_TIME);
1707                 } else if (action == P2PSD_ACTION_ID_GAS_IRESP ||
1708                            action == P2PSD_ACTION_ID_GAS_CRESP) {
1709                         /* configure service discovery response frame */
1710                         af_params->dwell_time =
1711                                 cpu_to_le32(P2P_AF_MIN_DWELL_TIME);
1712                 } else {
1713                         brcmf_err("Unknown action type: %d\n", action);
1714                         goto exit;
1715                 }
1716         } else if (brcmf_p2p_is_p2p_action(action_frame->data,
1717                                            action_frame_len)) {
1718                 /* do not configure anything. it will be */
1719                 /* sent with a default configuration     */
1720         } else {
1721                 brcmf_err("Unknown Frame: category 0x%x, action 0x%x\n",
1722                           category, action);
1723                 return false;
1724         }
1725
1726         /* if connecting on primary iface, sleep for a while before sending
1727          * af tx for VSDB
1728          */
1729         if (test_bit(BRCMF_VIF_STATUS_CONNECTING,
1730                      &p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->sme_state))
1731                 msleep(50);
1732
1733         /* if scan is ongoing, abort current scan. */
1734         if (test_bit(BRCMF_SCAN_STATUS_BUSY, &cfg->scan_status))
1735                 brcmf_abort_scanning(cfg);
1736
1737         memcpy(afx_hdl->tx_dst_addr, action_frame->da, ETH_ALEN);
1738
1739         /* To make sure to send successfully action frame, turn off mpc */
1740         if (config_af_params.mpc_onoff == 0)
1741                 brcmf_set_mpc(ifp, 0);
1742
1743         /* set status and destination address before sending af */
1744         if (p2p->next_af_subtype != P2P_PAF_SUBTYPE_INVALID) {
1745                 /* set status to cancel the remained dwell time in rx process */
1746                 set_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status);
1747         }
1748
1749         p2p->af_sent_channel = 0;
1750         set_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status);
1751         /* validate channel and p2p ies */
1752         if (config_af_params.search_channel &&
1753             IS_P2P_SOCIAL_CHANNEL(le32_to_cpu(af_params->channel)) &&
1754             p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif->saved_ie.probe_req_ie_len) {
1755                 afx_hdl = &p2p->afx_hdl;
1756                 afx_hdl->peer_listen_chan = le32_to_cpu(af_params->channel);
1757
1758                 if (brcmf_p2p_af_searching_channel(p2p) ==
1759                                                         P2P_INVALID_CHANNEL) {
1760                         brcmf_err("Couldn't find peer's channel.\n");
1761                         goto exit;
1762                 }
1763
1764                 /* Abort scan even for VSDB scenarios. Scan gets aborted in
1765                  * firmware but after the check of piggyback algorithm. To take
1766                  * care of current piggback algo, lets abort the scan here
1767                  * itself.
1768                  */
1769                 brcmf_notify_escan_complete(cfg, ifp, true, true);
1770
1771                 /* update channel */
1772                 af_params->channel = cpu_to_le32(afx_hdl->peer_chan);
1773         }
1774
1775         tx_retry = 0;
1776         while (!p2p->block_gon_req_tx &&
1777                (ack == false) && (tx_retry < P2P_AF_TX_MAX_RETRY)) {
1778                 ack = !brcmf_p2p_tx_action_frame(p2p, af_params);
1779                 tx_retry++;
1780         }
1781         if (ack == false) {
1782                 brcmf_err("Failed to send Action Frame(retry %d)\n", tx_retry);
1783                 clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status);
1784         }
1785
1786 exit:
1787         clear_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status);
1788
1789         /* WAR: sometimes dongle does not keep the dwell time of 'actframe'.
1790          * if we coundn't get the next action response frame and dongle does
1791          * not keep the dwell time, go to listen state again to get next action
1792          * response frame.
1793          */
1794         if (ack && config_af_params.extra_listen && !p2p->block_gon_req_tx &&
1795             test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status) &&
1796             p2p->af_sent_channel == afx_hdl->my_listen_chan) {
1797                 delta_ms = jiffies_to_msecs(jiffies - p2p->af_tx_sent_jiffies);
1798                 if (le32_to_cpu(af_params->dwell_time) > delta_ms)
1799                         extra_listen_time = le32_to_cpu(af_params->dwell_time) -
1800                                             delta_ms;
1801                 else
1802                         extra_listen_time = 0;
1803                 if (extra_listen_time > 50) {
1804                         set_bit(BRCMF_P2P_STATUS_WAITING_NEXT_AF_LISTEN,
1805                                 &p2p->status);
1806                         brcmf_dbg(INFO, "Wait more time! actual af time:%d, calculated extra listen:%d\n",
1807                                   le32_to_cpu(af_params->dwell_time),
1808                                   extra_listen_time);
1809                         extra_listen_time += 100;
1810                         if (!brcmf_p2p_discover_listen(p2p,
1811                                                        p2p->af_sent_channel,
1812                                                        extra_listen_time)) {
1813                                 unsigned long duration;
1814
1815                                 extra_listen_time += 100;
1816                                 duration = msecs_to_jiffies(extra_listen_time);
1817                                 wait_for_completion_timeout(&p2p->wait_next_af,
1818                                                             duration);
1819                         }
1820                         clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_AF_LISTEN,
1821                                   &p2p->status);
1822                 }
1823         }
1824
1825         if (p2p->block_gon_req_tx) {
1826                 /* if ack is true, supplicant will wait more time(100ms).
1827                  * so we will return it as a success to get more time .
1828                  */
1829                 p2p->block_gon_req_tx = false;
1830                 ack = true;
1831         }
1832
1833         clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status);
1834         /* if all done, turn mpc on again */
1835         if (config_af_params.mpc_onoff == 1)
1836                 brcmf_set_mpc(ifp, 1);
1837
1838         return ack;
1839 }
1840
1841 /**
1842  * brcmf_p2p_notify_rx_mgmt_p2p_probereq() - Event handler for p2p probe req.
1843  *
1844  * @ifp: interface pointer for which event was received.
1845  * @e: even message.
1846  * @data: payload of event message (probe request).
1847  */
1848 s32 brcmf_p2p_notify_rx_mgmt_p2p_probereq(struct brcmf_if *ifp,
1849                                           const struct brcmf_event_msg *e,
1850                                           void *data)
1851 {
1852         struct brcmf_cfg80211_info *cfg = ifp->drvr->config;
1853         struct brcmf_p2p_info *p2p = &cfg->p2p;
1854         struct afx_hdl *afx_hdl = &p2p->afx_hdl;
1855         struct brcmf_cfg80211_vif *vif = ifp->vif;
1856         struct brcmf_rx_mgmt_data *rxframe = (struct brcmf_rx_mgmt_data *)data;
1857         u16 chanspec = be16_to_cpu(rxframe->chanspec);
1858         struct brcmu_chan ch;
1859         u8 *mgmt_frame;
1860         u32 mgmt_frame_len;
1861         s32 freq;
1862         u16 mgmt_type;
1863
1864         brcmf_dbg(INFO, "Enter: event %d reason %d\n", e->event_code,
1865                   e->reason);
1866
1867         ch.chspec = be16_to_cpu(rxframe->chanspec);
1868         cfg->d11inf.decchspec(&ch);
1869
1870         if (test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status) &&
1871             (ether_addr_equal(afx_hdl->tx_dst_addr, e->addr))) {
1872                 afx_hdl->peer_chan = ch.chnum;
1873                 brcmf_dbg(INFO, "PROBE REQUEST: Peer found, channel=%d\n",
1874                           afx_hdl->peer_chan);
1875                 complete(&afx_hdl->act_frm_scan);
1876         }
1877
1878         /* Firmware sends us two proberesponses for each idx one. At the */
1879         /* moment anything but bsscfgidx 0 is passed up to supplicant    */
1880         if (e->bsscfgidx == 0)
1881                 return 0;
1882
1883         /* Filter any P2P probe reqs arriving during the GO-NEG Phase */
1884         if (test_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status)) {
1885                 brcmf_dbg(INFO, "Filtering P2P probe_req in GO-NEG phase\n");
1886                 return 0;
1887         }
1888
1889         /* Check if wpa_supplicant has registered for this frame */
1890         brcmf_dbg(INFO, "vif->mgmt_rx_reg %04x\n", vif->mgmt_rx_reg);
1891         mgmt_type = (IEEE80211_STYPE_PROBE_REQ & IEEE80211_FCTL_STYPE) >> 4;
1892         if ((vif->mgmt_rx_reg & BIT(mgmt_type)) == 0)
1893                 return 0;
1894
1895         mgmt_frame = (u8 *)(rxframe + 1);
1896         mgmt_frame_len = e->datalen - sizeof(*rxframe);
1897         freq = ieee80211_channel_to_frequency(ch.chnum,
1898                                               ch.band == BRCMU_CHAN_BAND_2G ?
1899                                               IEEE80211_BAND_2GHZ :
1900                                               IEEE80211_BAND_5GHZ);
1901
1902         cfg80211_rx_mgmt(&vif->wdev, freq, 0, mgmt_frame, mgmt_frame_len, 0);
1903
1904         brcmf_dbg(INFO, "mgmt_frame_len (%d) , e->datalen (%d), chanspec (%04x), freq (%d)\n",
1905                   mgmt_frame_len, e->datalen, chanspec, freq);
1906
1907         return 0;
1908 }
1909
1910
1911 /**
1912  * brcmf_p2p_get_current_chanspec() - Get current operation channel.
1913  *
1914  * @p2p: P2P specific data.
1915  * @chanspec: chanspec to be returned.
1916  */
1917 static void brcmf_p2p_get_current_chanspec(struct brcmf_p2p_info *p2p,
1918                                            u16 *chanspec)
1919 {
1920         struct brcmf_if *ifp;
1921         u8 mac_addr[ETH_ALEN];
1922         struct brcmu_chan ch;
1923         struct brcmf_bss_info_le *bi;
1924         u8 *buf;
1925
1926         ifp = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->ifp;
1927
1928         if (brcmf_fil_cmd_data_get(ifp, BRCMF_C_GET_BSSID, mac_addr,
1929                                    ETH_ALEN) == 0) {
1930                 buf = kzalloc(WL_BSS_INFO_MAX, GFP_KERNEL);
1931                 if (buf != NULL) {
1932                         *(__le32 *)buf = cpu_to_le32(WL_BSS_INFO_MAX);
1933                         if (brcmf_fil_cmd_data_get(ifp, BRCMF_C_GET_BSS_INFO,
1934                                                    buf, WL_BSS_INFO_MAX) == 0) {
1935                                 bi = (struct brcmf_bss_info_le *)(buf + 4);
1936                                 *chanspec = le16_to_cpu(bi->chanspec);
1937                                 kfree(buf);
1938                                 return;
1939                         }
1940                         kfree(buf);
1941                 }
1942         }
1943         /* Use default channel for P2P */
1944         ch.chnum = BRCMF_P2P_TEMP_CHAN;
1945         ch.bw = BRCMU_CHAN_BW_20;
1946         p2p->cfg->d11inf.encchspec(&ch);
1947         *chanspec = ch.chspec;
1948 }
1949
1950 /**
1951  * Change a P2P Role.
1952  * Parameters:
1953  * @mac: MAC address of the BSS to change a role
1954  * Returns 0 if success.
1955  */
1956 int brcmf_p2p_ifchange(struct brcmf_cfg80211_info *cfg,
1957                        enum brcmf_fil_p2p_if_types if_type)
1958 {
1959         struct brcmf_p2p_info *p2p = &cfg->p2p;
1960         struct brcmf_cfg80211_vif *vif;
1961         struct brcmf_fil_p2p_if_le if_request;
1962         s32 err;
1963         u16 chanspec;
1964
1965         brcmf_dbg(TRACE, "Enter\n");
1966
1967         vif = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif;
1968         if (!vif) {
1969                 brcmf_err("vif for P2PAPI_BSSCFG_PRIMARY does not exist\n");
1970                 return -EPERM;
1971         }
1972         brcmf_notify_escan_complete(cfg, vif->ifp, true, true);
1973         vif = p2p->bss_idx[P2PAPI_BSSCFG_CONNECTION].vif;
1974         if (!vif) {
1975                 brcmf_err("vif for P2PAPI_BSSCFG_CONNECTION does not exist\n");
1976                 return -EPERM;
1977         }
1978         brcmf_set_mpc(vif->ifp, 0);
1979
1980         /* In concurrency case, STA may be already associated in a particular */
1981         /* channel. so retrieve the current channel of primary interface and  */
1982         /* then start the virtual interface on that.                          */
1983         brcmf_p2p_get_current_chanspec(p2p, &chanspec);
1984
1985         if_request.type = cpu_to_le16((u16)if_type);
1986         if_request.chspec = cpu_to_le16(chanspec);
1987         memcpy(if_request.addr, p2p->int_addr, sizeof(if_request.addr));
1988
1989         brcmf_cfg80211_arm_vif_event(cfg, vif);
1990         err = brcmf_fil_iovar_data_set(vif->ifp, "p2p_ifupd", &if_request,
1991                                        sizeof(if_request));
1992         if (err) {
1993                 brcmf_err("p2p_ifupd FAILED, err=%d\n", err);
1994                 brcmf_cfg80211_arm_vif_event(cfg, NULL);
1995                 return err;
1996         }
1997         err = brcmf_cfg80211_wait_vif_event_timeout(cfg, BRCMF_E_IF_CHANGE,
1998                                                     msecs_to_jiffies(1500));
1999         brcmf_cfg80211_arm_vif_event(cfg, NULL);
2000         if (!err)  {
2001                 brcmf_err("No BRCMF_E_IF_CHANGE event received\n");
2002                 return -EIO;
2003         }
2004
2005         err = brcmf_fil_cmd_int_set(vif->ifp, BRCMF_C_SET_SCB_TIMEOUT,
2006                                     BRCMF_SCB_TIMEOUT_VALUE);
2007
2008         return err;
2009 }
2010
2011 static int brcmf_p2p_request_p2p_if(struct brcmf_p2p_info *p2p,
2012                                     struct brcmf_if *ifp, u8 ea[ETH_ALEN],
2013                                     enum brcmf_fil_p2p_if_types iftype)
2014 {
2015         struct brcmf_fil_p2p_if_le if_request;
2016         int err;
2017         u16 chanspec;
2018
2019         /* we need a default channel */
2020         brcmf_p2p_get_current_chanspec(p2p, &chanspec);
2021
2022         /* fill the firmware request */
2023         memcpy(if_request.addr, ea, ETH_ALEN);
2024         if_request.type = cpu_to_le16((u16)iftype);
2025         if_request.chspec = cpu_to_le16(chanspec);
2026
2027         err = brcmf_fil_iovar_data_set(ifp, "p2p_ifadd", &if_request,
2028                                        sizeof(if_request));
2029         if (err)
2030                 return err;
2031
2032         return err;
2033 }
2034
2035 static int brcmf_p2p_disable_p2p_if(struct brcmf_cfg80211_vif *vif)
2036 {
2037         struct brcmf_cfg80211_info *cfg = wdev_to_cfg(&vif->wdev);
2038         struct net_device *pri_ndev = cfg_to_ndev(cfg);
2039         struct brcmf_if *ifp = netdev_priv(pri_ndev);
2040         u8 *addr = vif->wdev.netdev->dev_addr;
2041
2042         return brcmf_fil_iovar_data_set(ifp, "p2p_ifdis", addr, ETH_ALEN);
2043 }
2044
2045 static int brcmf_p2p_release_p2p_if(struct brcmf_cfg80211_vif *vif)
2046 {
2047         struct brcmf_cfg80211_info *cfg = wdev_to_cfg(&vif->wdev);
2048         struct net_device *pri_ndev = cfg_to_ndev(cfg);
2049         struct brcmf_if *ifp = netdev_priv(pri_ndev);
2050         u8 *addr = vif->wdev.netdev->dev_addr;
2051
2052         return brcmf_fil_iovar_data_set(ifp, "p2p_ifdel", addr, ETH_ALEN);
2053 }
2054
2055 /**
2056  * brcmf_p2p_create_p2pdev() - create a P2P_DEVICE virtual interface.
2057  *
2058  * @p2p: P2P specific data.
2059  * @wiphy: wiphy device of new interface.
2060  * @addr: mac address for this new interface.
2061  */
2062 static struct wireless_dev *brcmf_p2p_create_p2pdev(struct brcmf_p2p_info *p2p,
2063                                                     struct wiphy *wiphy,
2064                                                     u8 *addr)
2065 {
2066         struct brcmf_cfg80211_vif *p2p_vif;
2067         struct brcmf_if *p2p_ifp;
2068         struct brcmf_if *pri_ifp;
2069         int err;
2070         u32 bssidx;
2071
2072         if (p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif)
2073                 return ERR_PTR(-ENOSPC);
2074
2075         p2p_vif = brcmf_alloc_vif(p2p->cfg, NL80211_IFTYPE_P2P_DEVICE,
2076                                   false);
2077         if (IS_ERR(p2p_vif)) {
2078                 brcmf_err("could not create discovery vif\n");
2079                 return (struct wireless_dev *)p2p_vif;
2080         }
2081
2082         pri_ifp = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->ifp;
2083         brcmf_p2p_generate_bss_mac(p2p, addr);
2084         brcmf_p2p_set_firmware(pri_ifp, p2p->dev_addr);
2085
2086         brcmf_cfg80211_arm_vif_event(p2p->cfg, p2p_vif);
2087         brcmf_fweh_p2pdev_setup(pri_ifp, true);
2088
2089         /* Initialize P2P Discovery in the firmware */
2090         err = brcmf_fil_iovar_int_set(pri_ifp, "p2p_disc", 1);
2091         if (err < 0) {
2092                 brcmf_err("set p2p_disc error\n");
2093                 brcmf_fweh_p2pdev_setup(pri_ifp, false);
2094                 brcmf_cfg80211_arm_vif_event(p2p->cfg, NULL);
2095                 goto fail;
2096         }
2097
2098         /* wait for firmware event */
2099         err = brcmf_cfg80211_wait_vif_event_timeout(p2p->cfg, BRCMF_E_IF_ADD,
2100                                                     msecs_to_jiffies(1500));
2101         brcmf_cfg80211_arm_vif_event(p2p->cfg, NULL);
2102         brcmf_fweh_p2pdev_setup(pri_ifp, false);
2103         if (!err) {
2104                 brcmf_err("timeout occurred\n");
2105                 err = -EIO;
2106                 goto fail;
2107         }
2108
2109         /* discovery interface created */
2110         p2p_ifp = p2p_vif->ifp;
2111         p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif = p2p_vif;
2112         memcpy(p2p_ifp->mac_addr, p2p->dev_addr, ETH_ALEN);
2113         memcpy(&p2p_vif->wdev.address, p2p->dev_addr, sizeof(p2p->dev_addr));
2114
2115         /* verify bsscfg index for P2P discovery */
2116         err = brcmf_fil_iovar_int_get(pri_ifp, "p2p_dev", &bssidx);
2117         if (err < 0) {
2118                 brcmf_err("retrieving discover bsscfg index failed\n");
2119                 goto fail;
2120         }
2121
2122         WARN_ON(p2p_ifp->bssidx != bssidx);
2123
2124         init_completion(&p2p->send_af_done);
2125         INIT_WORK(&p2p->afx_hdl.afx_work, brcmf_p2p_afx_handler);
2126         init_completion(&p2p->afx_hdl.act_frm_scan);
2127         init_completion(&p2p->wait_next_af);
2128
2129         return &p2p_vif->wdev;
2130
2131 fail:
2132         brcmf_free_vif(p2p_vif);
2133         return ERR_PTR(err);
2134 }
2135
2136 /**
2137  * brcmf_p2p_add_vif() - create a new P2P virtual interface.
2138  *
2139  * @wiphy: wiphy device of new interface.
2140  * @name: name of the new interface.
2141  * @name_assign_type: origin of the interface name
2142  * @type: nl80211 interface type.
2143  * @flags: not used.
2144  * @params: contains mac address for P2P device.
2145  */
2146 struct wireless_dev *brcmf_p2p_add_vif(struct wiphy *wiphy, const char *name,
2147                                        unsigned char name_assign_type,
2148                                        enum nl80211_iftype type, u32 *flags,
2149                                        struct vif_params *params)
2150 {
2151         struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
2152         struct brcmf_if *ifp = netdev_priv(cfg_to_ndev(cfg));
2153         struct brcmf_cfg80211_vif *vif;
2154         enum brcmf_fil_p2p_if_types iftype;
2155         int err;
2156
2157         if (brcmf_cfg80211_vif_event_armed(cfg))
2158                 return ERR_PTR(-EBUSY);
2159
2160         brcmf_dbg(INFO, "adding vif \"%s\" (type=%d)\n", name, type);
2161
2162         switch (type) {
2163         case NL80211_IFTYPE_P2P_CLIENT:
2164                 iftype = BRCMF_FIL_P2P_IF_CLIENT;
2165                 break;
2166         case NL80211_IFTYPE_P2P_GO:
2167                 iftype = BRCMF_FIL_P2P_IF_GO;
2168                 break;
2169         case NL80211_IFTYPE_P2P_DEVICE:
2170                 return brcmf_p2p_create_p2pdev(&cfg->p2p, wiphy,
2171                                                params->macaddr);
2172         default:
2173                 return ERR_PTR(-EOPNOTSUPP);
2174         }
2175
2176         vif = brcmf_alloc_vif(cfg, type, false);
2177         if (IS_ERR(vif))
2178                 return (struct wireless_dev *)vif;
2179         brcmf_cfg80211_arm_vif_event(cfg, vif);
2180
2181         err = brcmf_p2p_request_p2p_if(&cfg->p2p, ifp, cfg->p2p.int_addr,
2182                                        iftype);
2183         if (err) {
2184                 brcmf_cfg80211_arm_vif_event(cfg, NULL);
2185                 goto fail;
2186         }
2187
2188         /* wait for firmware event */
2189         err = brcmf_cfg80211_wait_vif_event_timeout(cfg, BRCMF_E_IF_ADD,
2190                                                     msecs_to_jiffies(1500));
2191         brcmf_cfg80211_arm_vif_event(cfg, NULL);
2192         if (!err) {
2193                 brcmf_err("timeout occurred\n");
2194                 err = -EIO;
2195                 goto fail;
2196         }
2197
2198         /* interface created in firmware */
2199         ifp = vif->ifp;
2200         if (!ifp) {
2201                 brcmf_err("no if pointer provided\n");
2202                 err = -ENOENT;
2203                 goto fail;
2204         }
2205
2206         strncpy(ifp->ndev->name, name, sizeof(ifp->ndev->name) - 1);
2207         ifp->ndev->name_assign_type = name_assign_type;
2208         err = brcmf_net_attach(ifp, true);
2209         if (err) {
2210                 brcmf_err("Registering netdevice failed\n");
2211                 goto fail;
2212         }
2213
2214         cfg->p2p.bss_idx[P2PAPI_BSSCFG_CONNECTION].vif = vif;
2215         /* Disable firmware roaming for P2P interface  */
2216         brcmf_fil_iovar_int_set(ifp, "roam_off", 1);
2217         if (iftype == BRCMF_FIL_P2P_IF_GO) {
2218                 /* set station timeout for p2p */
2219                 brcmf_fil_cmd_int_set(ifp, BRCMF_C_SET_SCB_TIMEOUT,
2220                                       BRCMF_SCB_TIMEOUT_VALUE);
2221         }
2222         return &ifp->vif->wdev;
2223
2224 fail:
2225         brcmf_free_vif(vif);
2226         return ERR_PTR(err);
2227 }
2228
2229 /**
2230  * brcmf_p2p_del_vif() - delete a P2P virtual interface.
2231  *
2232  * @wiphy: wiphy device of interface.
2233  * @wdev: wireless device of interface.
2234  */
2235 int brcmf_p2p_del_vif(struct wiphy *wiphy, struct wireless_dev *wdev)
2236 {
2237         struct brcmf_cfg80211_info *cfg = wiphy_priv(wiphy);
2238         struct brcmf_p2p_info *p2p = &cfg->p2p;
2239         struct brcmf_cfg80211_vif *vif;
2240         unsigned long jiffie_timeout = msecs_to_jiffies(1500);
2241         bool wait_for_disable = false;
2242         int err;
2243
2244         brcmf_dbg(TRACE, "delete P2P vif\n");
2245         vif = container_of(wdev, struct brcmf_cfg80211_vif, wdev);
2246
2247         brcmf_cfg80211_arm_vif_event(cfg, vif);
2248         switch (vif->wdev.iftype) {
2249         case NL80211_IFTYPE_P2P_CLIENT:
2250                 if (test_bit(BRCMF_VIF_STATUS_DISCONNECTING, &vif->sme_state))
2251                         wait_for_disable = true;
2252                 break;
2253
2254         case NL80211_IFTYPE_P2P_GO:
2255                 if (!brcmf_p2p_disable_p2p_if(vif))
2256                         wait_for_disable = true;
2257                 break;
2258
2259         case NL80211_IFTYPE_P2P_DEVICE:
2260                 if (!p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif)
2261                         return 0;
2262                 brcmf_p2p_cancel_remain_on_channel(vif->ifp);
2263                 brcmf_p2p_deinit_discovery(p2p);
2264         default:
2265                 return -ENOTSUPP;
2266         }
2267
2268         clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status);
2269         brcmf_dbg(INFO, "P2P: GO_NEG_PHASE status cleared\n");
2270
2271         if (wait_for_disable)
2272                 wait_for_completion_timeout(&cfg->vif_disabled,
2273                                             msecs_to_jiffies(500));
2274
2275         err = 0;
2276         if (vif->wdev.iftype != NL80211_IFTYPE_P2P_DEVICE) {
2277                 brcmf_vif_clear_mgmt_ies(vif);
2278                 err = brcmf_p2p_release_p2p_if(vif);
2279         }
2280         if (!err) {
2281                 /* wait for firmware event */
2282                 err = brcmf_cfg80211_wait_vif_event_timeout(cfg, BRCMF_E_IF_DEL,
2283                                                             jiffie_timeout);
2284                 if (!err)
2285                         err = -EIO;
2286                 else
2287                         err = 0;
2288         }
2289         if (err)
2290                 brcmf_remove_interface(vif->ifp);
2291
2292         brcmf_cfg80211_arm_vif_event(cfg, NULL);
2293         if (vif->wdev.iftype != NL80211_IFTYPE_P2P_DEVICE)
2294                 p2p->bss_idx[P2PAPI_BSSCFG_CONNECTION].vif = NULL;
2295
2296         return err;
2297 }
2298
2299 void brcmf_p2p_ifp_removed(struct brcmf_if *ifp)
2300 {
2301         struct brcmf_cfg80211_info *cfg;
2302         struct brcmf_cfg80211_vif *vif;
2303
2304         brcmf_dbg(INFO, "P2P: device interface removed\n");
2305         vif = ifp->vif;
2306         cfg = wdev_to_cfg(&vif->wdev);
2307         cfg->p2p.bss_idx[P2PAPI_BSSCFG_DEVICE].vif = NULL;
2308         rtnl_lock();
2309         cfg80211_unregister_wdev(&vif->wdev);
2310         rtnl_unlock();
2311         brcmf_free_vif(vif);
2312 }
2313
2314 int brcmf_p2p_start_device(struct wiphy *wiphy, struct wireless_dev *wdev)
2315 {
2316         struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
2317         struct brcmf_p2p_info *p2p = &cfg->p2p;
2318         struct brcmf_cfg80211_vif *vif;
2319         int err;
2320
2321         vif = container_of(wdev, struct brcmf_cfg80211_vif, wdev);
2322         mutex_lock(&cfg->usr_sync);
2323         err = brcmf_p2p_enable_discovery(p2p);
2324         if (!err)
2325                 set_bit(BRCMF_VIF_STATUS_READY, &vif->sme_state);
2326         mutex_unlock(&cfg->usr_sync);
2327         return err;
2328 }
2329
2330 void brcmf_p2p_stop_device(struct wiphy *wiphy, struct wireless_dev *wdev)
2331 {
2332         struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
2333         struct brcmf_p2p_info *p2p = &cfg->p2p;
2334         struct brcmf_cfg80211_vif *vif;
2335
2336         vif = container_of(wdev, struct brcmf_cfg80211_vif, wdev);
2337         /* This call can be result of the unregister_wdev call. In that case
2338          * we dont want to do anything anymore. Just return. The config vif
2339          * will have been cleared at this point.
2340          */
2341         if (p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif == vif) {
2342                 mutex_lock(&cfg->usr_sync);
2343                 /* Set the discovery state to SCAN */
2344                 (void)brcmf_p2p_set_discover_state(vif->ifp,
2345                                                    WL_P2P_DISC_ST_SCAN, 0, 0);
2346                 brcmf_abort_scanning(cfg);
2347                 clear_bit(BRCMF_VIF_STATUS_READY, &vif->sme_state);
2348                 mutex_unlock(&cfg->usr_sync);
2349         }
2350 }
2351
2352 /**
2353  * brcmf_p2p_attach() - attach for P2P.
2354  *
2355  * @cfg: driver private data for cfg80211 interface.
2356  * @p2pdev_forced: create p2p device interface at attach.
2357  */
2358 s32 brcmf_p2p_attach(struct brcmf_cfg80211_info *cfg, bool p2pdev_forced)
2359 {
2360         struct brcmf_p2p_info *p2p;
2361         struct brcmf_if *pri_ifp;
2362         s32 err = 0;
2363         void *err_ptr;
2364
2365         p2p = &cfg->p2p;
2366         p2p->cfg = cfg;
2367
2368         pri_ifp = brcmf_get_ifp(cfg->pub, 0);
2369         p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif = pri_ifp->vif;
2370
2371         if (p2pdev_forced) {
2372                 err_ptr = brcmf_p2p_create_p2pdev(p2p, NULL, NULL);
2373                 if (IS_ERR(err_ptr)) {
2374                         brcmf_err("P2P device creation failed.\n");
2375                         err = PTR_ERR(err_ptr);
2376                 }
2377         } else {
2378                 p2p->p2pdev_dynamically = true;
2379         }
2380         return err;
2381 }
2382
2383 /**
2384  * brcmf_p2p_detach() - detach P2P.
2385  *
2386  * @p2p: P2P specific data.
2387  */
2388 void brcmf_p2p_detach(struct brcmf_p2p_info *p2p)
2389 {
2390         struct brcmf_cfg80211_vif *vif;
2391
2392         vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif;
2393         if (vif != NULL) {
2394                 brcmf_p2p_cancel_remain_on_channel(vif->ifp);
2395                 brcmf_p2p_deinit_discovery(p2p);
2396                 brcmf_remove_interface(vif->ifp);
2397         }
2398         /* just set it all to zero */
2399         memset(p2p, 0, sizeof(*p2p));
2400 }
2401