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

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