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

   1 /*
   2  * Copyright (c) 2012 Broadcom Corporation
   3  *
   4  * Permission to use, copy, modify, and/or distribute this software for any
   5  * purpose with or without fee is hereby granted, provided that the above
   6  * copyright notice and this permission notice appear in all copies.
   7  *
   8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
  11  * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
  13  * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
  14  * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15  */
  16 #include <linux/slab.h>
  17 #include <linux/netdevice.h>
  18 #include <linux/etherdevice.h>
  19 #include <linux/rtnetlink.h>
  20 #include <net/cfg80211.h>
  21
  22 #include <brcmu_wifi.h>
  23 #include <brcmu_utils.h>
  24 #include <defs.h>
  25 #include "core.h"
  26 #include "debug.h"
  27 #include "fwil.h"
  28 #include "fwil_types.h"
  29 #include "p2p.h"
  30 #include "cfg80211.h"
  31
  32 /* parameters used for p2p escan */
  33 #define P2PAPI_SCAN_NPROBES 1
  34 #define P2PAPI_SCAN_DWELL_TIME_MS 80
  35 #define P2PAPI_SCAN_SOCIAL_DWELL_TIME_MS 40
  36 #define P2PAPI_SCAN_HOME_TIME_MS 60
  37 #define P2PAPI_SCAN_NPROBS_TIME_MS 30
  38 #define P2PAPI_SCAN_AF_SEARCH_DWELL_TIME_MS 100
  39 #define WL_SCAN_CONNECT_DWELL_TIME_MS 200
  40 #define WL_SCAN_JOIN_PROBE_INTERVAL_MS 20
  41
  42 #define BRCMF_P2P_WILDCARD_SSID         "DIRECT-"
  43 #define BRCMF_P2P_WILDCARD_SSID_LEN     (sizeof(BRCMF_P2P_WILDCARD_SSID) - 1)
  44
  45 #define SOCIAL_CHAN_1           1
  46 #define SOCIAL_CHAN_2           6
  47 #define SOCIAL_CHAN_3           11
  48 #define IS_P2P_SOCIAL_CHANNEL(channel) ((channel == SOCIAL_CHAN_1) || \
  49                                          (channel == SOCIAL_CHAN_2) || \
  50                                          (channel == SOCIAL_CHAN_3))
  51 #define BRCMF_P2P_TEMP_CHAN     SOCIAL_CHAN_3
  52 #define SOCIAL_CHAN_CNT         3
  53 #define AF_PEER_SEARCH_CNT      2
  54
  55 #define BRCMF_SCB_TIMEOUT_VALUE 20
  56
  57 #define P2P_VER                 9       /* P2P version: 9=WiFi P2P v1.0 */
  58 #define P2P_PUB_AF_CATEGORY     0x04
  59 #define P2P_PUB_AF_ACTION       0x09
  60 #define P2P_AF_CATEGORY         0x7f
  61 #define P2P_OUI                 "\x50\x6F\x9A"  /* P2P OUI */
  62 #define P2P_OUI_LEN             3               /* P2P OUI length */
  63
  64 /* Action Frame Constants */
  65 #define DOT11_ACTION_HDR_LEN    2       /* action frame category + action */
  66 #define DOT11_ACTION_CAT_OFF    0       /* category offset */
  67 #define DOT11_ACTION_ACT_OFF    1       /* action offset */
  68
  69 #define P2P_AF_DWELL_TIME               200
  70 #define P2P_AF_MIN_DWELL_TIME           100
  71 #define P2P_AF_MED_DWELL_TIME           400
  72 #define P2P_AF_LONG_DWELL_TIME          1000
  73 #define P2P_AF_TX_MAX_RETRY             1
  74 #define P2P_AF_MAX_WAIT_TIME            2000
  75 #define P2P_INVALID_CHANNEL             -1
  76 #define P2P_CHANNEL_SYNC_RETRY          5
  77 #define P2P_AF_FRM_SCAN_MAX_WAIT        1500
  78 #define P2P_DEFAULT_SLEEP_TIME_VSDB     200
  79
  80 /* WiFi P2P Public Action Frame OUI Subtypes */
  81 #define P2P_PAF_GON_REQ         0       /* Group Owner Negotiation Req */
  82 #define P2P_PAF_GON_RSP         1       /* Group Owner Negotiation Rsp */
  83 #define P2P_PAF_GON_CONF        2       /* Group Owner Negotiation Confirm */
  84 #define P2P_PAF_INVITE_REQ      3       /* P2P Invitation Request */
  85 #define P2P_PAF_INVITE_RSP      4       /* P2P Invitation Response */
  86 #define P2P_PAF_DEVDIS_REQ      5       /* Device Discoverability Request */
  87 #define P2P_PAF_DEVDIS_RSP      6       /* Device Discoverability Response */
  88 #define P2P_PAF_PROVDIS_REQ     7       /* Provision Discovery Request */
  89 #define P2P_PAF_PROVDIS_RSP     8       /* Provision Discovery Response */
  90 #define P2P_PAF_SUBTYPE_INVALID 255     /* Invalid Subtype */
  91
  92 /* WiFi P2P Action Frame OUI Subtypes */
  93 #define P2P_AF_NOTICE_OF_ABSENCE        0       /* Notice of Absence */
  94 #define P2P_AF_PRESENCE_REQ             1       /* P2P Presence Request */
  95 #define P2P_AF_PRESENCE_RSP             2       /* P2P Presence Response */
  96 #define P2P_AF_GO_DISC_REQ              3       /* GO Discoverability Request */
  97
  98 /* P2P Service Discovery related */
  99 #define P2PSD_ACTION_CATEGORY           0x04    /* Public action frame */
 100 #define P2PSD_ACTION_ID_GAS_IREQ        0x0a    /* GAS Initial Request AF */
 101 #define P2PSD_ACTION_ID_GAS_IRESP       0x0b    /* GAS Initial Response AF */
 102 #define P2PSD_ACTION_ID_GAS_CREQ        0x0c    /* GAS Comback Request AF */
 103 #define P2PSD_ACTION_ID_GAS_CRESP       0x0d    /* GAS Comback Response AF */
 104
 105 /**
 106  * struct brcmf_p2p_disc_st_le - set discovery state in firmware.
 107  *
 108  * @state: requested discovery state (see enum brcmf_p2p_disc_state).
 109  * @chspec: channel parameter for %WL_P2P_DISC_ST_LISTEN state.
 110  * @dwell: dwell time in ms for %WL_P2P_DISC_ST_LISTEN state.
 111  */
 112 struct brcmf_p2p_disc_st_le {
 113         u8 state;
 114         __le16 chspec;
 115         __le16 dwell;
 116 };
 117
 118 /**
 119  * enum brcmf_p2p_disc_state - P2P discovery state values
 120  *
 121  * @WL_P2P_DISC_ST_SCAN: P2P discovery with wildcard SSID and P2P IE.
 122  * @WL_P2P_DISC_ST_LISTEN: P2P discovery off-channel for specified time.
 123  * @WL_P2P_DISC_ST_SEARCH: P2P discovery with P2P wildcard SSID and P2P IE.
 124  */
 125 enum brcmf_p2p_disc_state {
 126         WL_P2P_DISC_ST_SCAN,
 127         WL_P2P_DISC_ST_LISTEN,
 128         WL_P2P_DISC_ST_SEARCH
 129 };
 130
 131 /**
 132  * struct brcmf_p2p_scan_le - P2P specific scan request.
 133  *
 134  * @type: type of scan method requested (values: 'E' or 'S').
 135  * @reserved: reserved (ignored).
 136  * @eparams: parameters used for type 'E'.
 137  * @sparams: parameters used for type 'S'.
 138  */
 139 struct brcmf_p2p_scan_le {
 140         u8 type;
 141         u8 reserved[3];
 142         union {
 143                 struct brcmf_escan_params_le eparams;
 144                 struct brcmf_scan_params_le sparams;
 145         };
 146 };
 147
 148 /**
 149  * struct brcmf_p2p_pub_act_frame - WiFi P2P Public Action Frame
 150  *
 151  * @category: P2P_PUB_AF_CATEGORY
 152  * @action: P2P_PUB_AF_ACTION
 153  * @oui[3]: P2P_OUI
 154  * @oui_type: OUI type - P2P_VER
 155  * @subtype: OUI subtype - P2P_TYPE_*
 156  * @dialog_token: nonzero, identifies req/rsp transaction
 157  * @elts[1]: Variable length information elements.
 158  */
 159 struct brcmf_p2p_pub_act_frame {
 160         u8      category;
 161         u8      action;
 162         u8      oui[3];
 163         u8      oui_type;
 164         u8      subtype;
 165         u8      dialog_token;
 166         u8      elts[1];
 167 };
 168
 169 /**
 170  * struct brcmf_p2p_action_frame - WiFi P2P Action Frame
 171  *
 172  * @category: P2P_AF_CATEGORY
 173  * @OUI[3]: OUI - P2P_OUI
 174  * @type: OUI Type - P2P_VER
 175  * @subtype: OUI Subtype - P2P_AF_*
 176  * @dialog_token: nonzero, identifies req/resp tranaction
 177  * @elts[1]: Variable length information elements.
 178  */
 179 struct brcmf_p2p_action_frame {
 180         u8      category;
 181         u8      oui[3];
 182         u8      type;
 183         u8      subtype;
 184         u8      dialog_token;
 185         u8      elts[1];
 186 };
 187
 188 /**
 189  * struct brcmf_p2psd_gas_pub_act_frame - Wi-Fi GAS Public Action Frame
 190  *
 191  * @category: 0x04 Public Action Frame
 192  * @action: 0x6c Advertisement Protocol
 193  * @dialog_token: nonzero, identifies req/rsp transaction
 194  * @query_data[1]: Query Data. SD gas ireq SD gas iresp
 195  */
 196 struct brcmf_p2psd_gas_pub_act_frame {
 197         u8      category;
 198         u8      action;
 199         u8      dialog_token;
 200         u8      query_data[1];
 201 };
 202
 203 /**
 204  * struct brcmf_config_af_params - Action Frame Parameters for tx.
 205  *
 206  * @mpc_onoff: To make sure to send successfully action frame, we have to
 207  *             turn off mpc  0: off, 1: on,  (-1): do nothing
 208  * @search_channel: 1: search peer's channel to send af
 209  * extra_listen: keep the dwell time to get af response frame.
 210  */
 211 struct brcmf_config_af_params {
 212         s32 mpc_onoff;
 213         bool search_channel;
 214         bool extra_listen;
 215 };
 216
 217 /**
 218  * brcmf_p2p_is_pub_action() - true if p2p public type frame.
 219  *
 220  * @frame: action frame data.
 221  * @frame_len: length of action frame data.
 222  *
 223  * Determine if action frame is p2p public action type
 224  */
 225 static bool brcmf_p2p_is_pub_action(void *frame, u32 frame_len)
 226 {
 227         struct brcmf_p2p_pub_act_frame *pact_frm;
 228
 229         if (frame == NULL)
 230                 return false;
 231
 232         pact_frm = (struct brcmf_p2p_pub_act_frame *)frame;
 233         if (frame_len < sizeof(struct brcmf_p2p_pub_act_frame) - 1)
 234                 return false;
 235
 236         if (pact_frm->category == P2P_PUB_AF_CATEGORY &&
 237             pact_frm->action == P2P_PUB_AF_ACTION &&
 238             pact_frm->oui_type == P2P_VER &&
 239             memcmp(pact_frm->oui, P2P_OUI, P2P_OUI_LEN) == 0)
 240                 return true;
 241
 242         return false;
 243 }
 244
 245 /**
 246  * brcmf_p2p_is_p2p_action() - true if p2p action type frame.
 247  *
 248  * @frame: action frame data.
 249  * @frame_len: length of action frame data.
 250  *
 251  * Determine if action frame is p2p action type
 252  */
 253 static bool brcmf_p2p_is_p2p_action(void *frame, u32 frame_len)
 254 {
 255         struct brcmf_p2p_action_frame *act_frm;
 256
 257         if (frame == NULL)
 258                 return false;
 259
 260         act_frm = (struct brcmf_p2p_action_frame *)frame;
 261         if (frame_len < sizeof(struct brcmf_p2p_action_frame) - 1)
 262                 return false;
 263
 264         if (act_frm->category == P2P_AF_CATEGORY &&
 265             act_frm->type  == P2P_VER &&
 266             memcmp(act_frm->oui, P2P_OUI, P2P_OUI_LEN) == 0)
 267                 return true;
 268
 269         return false;
 270 }
 271
 272 /**
 273  * brcmf_p2p_is_gas_action() - true if p2p gas action type frame.
 274  *
 275  * @frame: action frame data.
 276  * @frame_len: length of action frame data.
 277  *
 278  * Determine if action frame is p2p gas action type
 279  */
 280 static bool brcmf_p2p_is_gas_action(void *frame, u32 frame_len)
 281 {
 282         struct brcmf_p2psd_gas_pub_act_frame *sd_act_frm;
 283
 284         if (frame == NULL)
 285                 return false;
 286
 287         sd_act_frm = (struct brcmf_p2psd_gas_pub_act_frame *)frame;
 288         if (frame_len < sizeof(struct brcmf_p2psd_gas_pub_act_frame) - 1)
 289                 return false;
 290
 291         if (sd_act_frm->category != P2PSD_ACTION_CATEGORY)
 292                 return false;
 293
 294         if (sd_act_frm->action == P2PSD_ACTION_ID_GAS_IREQ ||
 295             sd_act_frm->action == P2PSD_ACTION_ID_GAS_IRESP ||
 296             sd_act_frm->action == P2PSD_ACTION_ID_GAS_CREQ ||
 297             sd_act_frm->action == P2PSD_ACTION_ID_GAS_CRESP)
 298                 return true;
 299
 300         return false;
 301 }
 302
 303 /**
 304  * brcmf_p2p_print_actframe() - debug print routine.
 305  *
 306  * @tx: Received or to be transmitted
 307  * @frame: action frame data.
 308  * @frame_len: length of action frame data.
 309  *
 310  * Print information about the p2p action frame
 311  */
 312
 313 #ifdef DEBUG
 314
 315 static void brcmf_p2p_print_actframe(bool tx, void *frame, u32 frame_len)
 316 {
 317         struct brcmf_p2p_pub_act_frame *pact_frm;
 318         struct brcmf_p2p_action_frame *act_frm;
 319         struct brcmf_p2psd_gas_pub_act_frame *sd_act_frm;
 320
 321         if (!frame || frame_len <= 2)
 322                 return;
 323
 324         if (brcmf_p2p_is_pub_action(frame, frame_len)) {
 325                 pact_frm = (struct brcmf_p2p_pub_act_frame *)frame;
 326                 switch (pact_frm->subtype) {
 327                 case P2P_PAF_GON_REQ:
 328                         brcmf_dbg(TRACE, "%s P2P Group Owner Negotiation Req Frame\n",
 329                                   (tx) ? "TX" : "RX");
 330                         break;
 331                 case P2P_PAF_GON_RSP:
 332                         brcmf_dbg(TRACE, "%s P2P Group Owner Negotiation Rsp Frame\n",
 333                                   (tx) ? "TX" : "RX");
 334                         break;
 335                 case P2P_PAF_GON_CONF:
 336                         brcmf_dbg(TRACE, "%s P2P Group Owner Negotiation Confirm Frame\n",
 337                                   (tx) ? "TX" : "RX");
 338                         break;
 339                 case P2P_PAF_INVITE_REQ:
 340                         brcmf_dbg(TRACE, "%s P2P Invitation Request  Frame\n",
 341                                   (tx) ? "TX" : "RX");
 342                         break;
 343                 case P2P_PAF_INVITE_RSP:
 344                         brcmf_dbg(TRACE, "%s P2P Invitation Response Frame\n",
 345                                   (tx) ? "TX" : "RX");
 346                         break;
 347                 case P2P_PAF_DEVDIS_REQ:
 348                         brcmf_dbg(TRACE, "%s P2P Device Discoverability Request Frame\n",
 349                                   (tx) ? "TX" : "RX");
 350                         break;
 351                 case P2P_PAF_DEVDIS_RSP:
 352                         brcmf_dbg(TRACE, "%s P2P Device Discoverability Response Frame\n",
 353                                   (tx) ? "TX" : "RX");
 354                         break;
 355                 case P2P_PAF_PROVDIS_REQ:
 356                         brcmf_dbg(TRACE, "%s P2P Provision Discovery Request Frame\n",
 357                                   (tx) ? "TX" : "RX");
 358                         break;
 359                 case P2P_PAF_PROVDIS_RSP:
 360                         brcmf_dbg(TRACE, "%s P2P Provision Discovery Response Frame\n",
 361                                   (tx) ? "TX" : "RX");
 362                         break;
 363                 default:
 364                         brcmf_dbg(TRACE, "%s Unknown P2P Public Action Frame\n",
 365                                   (tx) ? "TX" : "RX");
 366                         break;
 367                 }
 368         } else if (brcmf_p2p_is_p2p_action(frame, frame_len)) {
 369                 act_frm = (struct brcmf_p2p_action_frame *)frame;
 370                 switch (act_frm->subtype) {
 371                 case P2P_AF_NOTICE_OF_ABSENCE:
 372                         brcmf_dbg(TRACE, "%s P2P Notice of Absence Frame\n",
 373                                   (tx) ? "TX" : "RX");
 374                         break;
 375                 case P2P_AF_PRESENCE_REQ:
 376                         brcmf_dbg(TRACE, "%s P2P Presence Request Frame\n",
 377                                   (tx) ? "TX" : "RX");
 378                         break;
 379                 case P2P_AF_PRESENCE_RSP:
 380                         brcmf_dbg(TRACE, "%s P2P Presence Response Frame\n",
 381                                   (tx) ? "TX" : "RX");
 382                         break;
 383                 case P2P_AF_GO_DISC_REQ:
 384                         brcmf_dbg(TRACE, "%s P2P Discoverability Request Frame\n",
 385                                   (tx) ? "TX" : "RX");
 386                         break;
 387                 default:
 388                         brcmf_dbg(TRACE, "%s Unknown P2P Action Frame\n",
 389                                   (tx) ? "TX" : "RX");
 390                 }
 391
 392         } else if (brcmf_p2p_is_gas_action(frame, frame_len)) {
 393                 sd_act_frm = (struct brcmf_p2psd_gas_pub_act_frame *)frame;
 394                 switch (sd_act_frm->action) {
 395                 case P2PSD_ACTION_ID_GAS_IREQ:
 396                         brcmf_dbg(TRACE, "%s P2P GAS Initial Request\n",
 397                                   (tx) ? "TX" : "RX");
 398                         break;
 399                 case P2PSD_ACTION_ID_GAS_IRESP:
 400                         brcmf_dbg(TRACE, "%s P2P GAS Initial Response\n",
 401                                   (tx) ? "TX" : "RX");
 402                         break;
 403                 case P2PSD_ACTION_ID_GAS_CREQ:
 404                         brcmf_dbg(TRACE, "%s P2P GAS Comback Request\n",
 405                                   (tx) ? "TX" : "RX");
 406                         break;
 407                 case P2PSD_ACTION_ID_GAS_CRESP:
 408                         brcmf_dbg(TRACE, "%s P2P GAS Comback Response\n",
 409                                   (tx) ? "TX" : "RX");
 410                         break;
 411                 default:
 412                         brcmf_dbg(TRACE, "%s Unknown P2P GAS Frame\n",
 413                                   (tx) ? "TX" : "RX");
 414                         break;
 415                 }
 416         }
 417 }
 418
 419 #else
 420
 421 static void brcmf_p2p_print_actframe(bool tx, void *frame, u32 frame_len)
 422 {
 423 }
 424
 425 #endif
 426
 427
 428 /**
 429  * brcmf_p2p_set_firmware() - prepare firmware for peer-to-peer operation.
 430  *
 431  * @ifp: ifp to use for iovars (primary).
 432  * @p2p_mac: mac address to configure for p2p_da_override
 433  */
 434 static int brcmf_p2p_set_firmware(struct brcmf_if *ifp, u8 *p2p_mac)
 435 {
 436         s32 ret = 0;
 437
 438         brcmf_fil_cmd_int_set(ifp, BRCMF_C_DOWN, 1);
 439         brcmf_fil_iovar_int_set(ifp, "apsta", 1);
 440         brcmf_fil_cmd_int_set(ifp, BRCMF_C_UP, 1);
 441
 442         /* In case of COB type, firmware has default mac address
 443          * After Initializing firmware, we have to set current mac address to
 444          * firmware for P2P device address. This must be done with discovery
 445          * disabled.
 446          */
 447         brcmf_fil_iovar_int_set(ifp, "p2p_disc", 0);
 448
 449         ret = brcmf_fil_iovar_data_set(ifp, "p2p_da_override", p2p_mac,
 450                                        ETH_ALEN);
 451         if (ret)
 452                 brcmf_err("failed to update device address ret %d\n", ret);
 453
 454         return ret;
 455 }
 456
 457 /**
 458  * brcmf_p2p_generate_bss_mac() - derive mac addresses for P2P.
 459  *
 460  * @p2p: P2P specific data.
 461  * @dev_addr: optional device address.
 462  *
 463  * P2P needs mac addresses for P2P device and interface. If no device
 464  * address it specified, these are derived from a random ethernet
 465  * address.
 466  */
 467 static void brcmf_p2p_generate_bss_mac(struct brcmf_p2p_info *p2p, u8 *dev_addr)
 468 {
 469         bool random_addr = false;
 470
 471         if (!dev_addr || is_zero_ether_addr(dev_addr))
 472                 random_addr = true;
 473
 474         /* Generate the P2P Device Address obtaining a random ethernet
 475          * address with the locally administered bit set.
 476          */
 477         if (random_addr)
 478                 eth_random_addr(p2p->dev_addr);
 479         else
 480                 memcpy(p2p->dev_addr, dev_addr, ETH_ALEN);
 481
 482         /* Generate the P2P Interface Address.  If the discovery and connection
 483          * BSSCFGs need to simultaneously co-exist, then this address must be
 484          * different from the P2P Device Address, but also locally administered.
 485          */
 486         memcpy(p2p->int_addr, p2p->dev_addr, ETH_ALEN);
 487         p2p->int_addr[0] |= 0x02;
 488         p2p->int_addr[4] ^= 0x80;
 489 }
 490
 491 /**
 492  * brcmf_p2p_scan_is_p2p_request() - is cfg80211 scan request a P2P scan.
 493  *
 494  * @request: the scan request as received from cfg80211.
 495  *
 496  * returns true if one of the ssids in the request matches the
 497  * P2P wildcard ssid; otherwise returns false.
 498  */
 499 static bool brcmf_p2p_scan_is_p2p_request(struct cfg80211_scan_request *request)
 500 {
 501         struct cfg80211_ssid *ssids = request->ssids;
 502         int i;
 503
 504         for (i = 0; i < request->n_ssids; i++) {
 505                 if (ssids[i].ssid_len != BRCMF_P2P_WILDCARD_SSID_LEN)
 506                         continue;
 507
 508                 brcmf_dbg(INFO, "comparing ssid \"%s\"", ssids[i].ssid);
 509                 if (!memcmp(BRCMF_P2P_WILDCARD_SSID, ssids[i].ssid,
 510                             BRCMF_P2P_WILDCARD_SSID_LEN))
 511                         return true;
 512         }
 513         return false;
 514 }
 515
 516 /**
 517  * brcmf_p2p_set_discover_state - set discover state in firmware.
 518  *
 519  * @ifp: low-level interface object.
 520  * @state: discover state to set.
 521  * @chanspec: channel parameters (for state @WL_P2P_DISC_ST_LISTEN only).
 522  * @listen_ms: duration to listen (for state @WL_P2P_DISC_ST_LISTEN only).
 523  */
 524 static s32 brcmf_p2p_set_discover_state(struct brcmf_if *ifp, u8 state,
 525                                         u16 chanspec, u16 listen_ms)
 526 {
 527         struct brcmf_p2p_disc_st_le discover_state;
 528         s32 ret = 0;
 529         brcmf_dbg(TRACE, "enter\n");
 530
 531         discover_state.state = state;
 532         discover_state.chspec = cpu_to_le16(chanspec);
 533         discover_state.dwell = cpu_to_le16(listen_ms);
 534         ret = brcmf_fil_bsscfg_data_set(ifp, "p2p_state", &discover_state,
 535                                         sizeof(discover_state));
 536         return ret;
 537 }
 538
 539 /**
 540  * brcmf_p2p_deinit_discovery() - disable P2P device discovery.
 541  *
 542  * @p2p: P2P specific data.
 543  *
 544  * Resets the discovery state and disables it in firmware.
 545  */
 546 static s32 brcmf_p2p_deinit_discovery(struct brcmf_p2p_info *p2p)
 547 {
 548         struct brcmf_cfg80211_vif *vif;
 549
 550         brcmf_dbg(TRACE, "enter\n");
 551
 552         /* Set the discovery state to SCAN */
 553         vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif;
 554         (void)brcmf_p2p_set_discover_state(vif->ifp, WL_P2P_DISC_ST_SCAN, 0, 0);
 555
 556         /* Disable P2P discovery in the firmware */
 557         vif = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif;
 558         (void)brcmf_fil_iovar_int_set(vif->ifp, "p2p_disc", 0);
 559
 560         return 0;
 561 }
 562
 563 /**
 564  * brcmf_p2p_enable_discovery() - initialize and configure discovery.
 565  *
 566  * @p2p: P2P specific data.
 567  *
 568  * Initializes the discovery device and configure the virtual interface.
 569  */
 570 static int brcmf_p2p_enable_discovery(struct brcmf_p2p_info *p2p)
 571 {
 572         struct brcmf_cfg80211_vif *vif;
 573         s32 ret = 0;
 574
 575         brcmf_dbg(TRACE, "enter\n");
 576         vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif;
 577         if (!vif) {
 578                 brcmf_err("P2P config device not available\n");
 579                 ret = -EPERM;
 580                 goto exit;
 581         }
 582
 583         if (test_bit(BRCMF_P2P_STATUS_ENABLED, &p2p->status)) {
 584                 brcmf_dbg(INFO, "P2P config device already configured\n");
 585                 goto exit;
 586         }
 587
 588         /* Re-initialize P2P Discovery in the firmware */
 589         vif = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif;
 590         ret = brcmf_fil_iovar_int_set(vif->ifp, "p2p_disc", 1);
 591         if (ret < 0) {
 592                 brcmf_err("set p2p_disc error\n");
 593                 goto exit;
 594         }
 595         vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif;
 596         ret = brcmf_p2p_set_discover_state(vif->ifp, WL_P2P_DISC_ST_SCAN, 0, 0);
 597         if (ret < 0) {
 598                 brcmf_err("unable to set WL_P2P_DISC_ST_SCAN\n");
 599                 goto exit;
 600         }
 601
 602         /*
 603          * Set wsec to any non-zero value in the discovery bsscfg
 604          * to ensure our P2P probe responses have the privacy bit
 605          * set in the 802.11 WPA IE. Some peer devices may not
 606          * initiate WPS with us if this bit is not set.
 607          */
 608         ret = brcmf_fil_bsscfg_int_set(vif->ifp, "wsec", AES_ENABLED);
 609         if (ret < 0) {
 610                 brcmf_err("wsec error %d\n", ret);
 611                 goto exit;
 612         }
 613
 614         set_bit(BRCMF_P2P_STATUS_ENABLED, &p2p->status);
 615 exit:
 616         return ret;
 617 }
 618
 619 /**
 620  * brcmf_p2p_escan() - initiate a P2P scan.
 621  *
 622  * @p2p: P2P specific data.
 623  * @num_chans: number of channels to scan.
 624  * @chanspecs: channel parameters for @num_chans channels.
 625  * @search_state: P2P discover state to use.
 626  * @action: scan action to pass to firmware.
 627  * @bss_type: type of P2P bss.
 628  */
 629 static s32 brcmf_p2p_escan(struct brcmf_p2p_info *p2p, u32 num_chans,
 630                            u16 chanspecs[], s32 search_state, u16 action,
 631                            enum p2p_bss_type bss_type)
 632 {
 633         s32 ret = 0;
 634         s32 memsize = offsetof(struct brcmf_p2p_scan_le,
 635                                eparams.params_le.channel_list);
 636         s32 nprobes;
 637         s32 active;
 638         u32 i;
 639         u8 *memblk;
 640         struct brcmf_cfg80211_vif *vif;
 641         struct brcmf_p2p_scan_le *p2p_params;
 642         struct brcmf_scan_params_le *sparams;
 643         struct brcmf_ssid ssid;
 644
 645         memsize += num_chans * sizeof(__le16);
 646         memblk = kzalloc(memsize, GFP_KERNEL);
 647         if (!memblk)
 648                 return -ENOMEM;
 649
 650         vif = p2p->bss_idx[bss_type].vif;
 651         if (vif == NULL) {
 652                 brcmf_err("no vif for bss type %d\n", bss_type);
 653                 ret = -EINVAL;
 654                 goto exit;
 655         }
 656
 657         switch (search_state) {
 658         case WL_P2P_DISC_ST_SEARCH:
 659                 /*
 660                  * If we in SEARCH STATE, we don't need to set SSID explictly
 661                  * because dongle use P2P WILDCARD internally by default
 662                  */
 663                 /* use null ssid */
 664                 ssid.SSID_len = 0;
 665                 memset(ssid.SSID, 0, sizeof(ssid.SSID));
 666                 break;
 667         case WL_P2P_DISC_ST_SCAN:
 668                 /*
 669                  * wpa_supplicant has p2p_find command with type social or
 670                  * progressive. For progressive, we need to set the ssid to
 671                  * P2P WILDCARD because we just do broadcast scan unless
 672                  * setting SSID.
 673                  */
 674                 ssid.SSID_len = BRCMF_P2P_WILDCARD_SSID_LEN;
 675                 memcpy(ssid.SSID, BRCMF_P2P_WILDCARD_SSID, ssid.SSID_len);
 676                 break;
 677         default:
 678                 brcmf_err(" invalid search state %d\n", search_state);
 679                 ret = -EINVAL;
 680                 goto exit;
 681         }
 682
 683         brcmf_p2p_set_discover_state(vif->ifp, search_state, 0, 0);
 684
 685         /*
 686          * set p2p scan parameters.
 687          */
 688         p2p_params = (struct brcmf_p2p_scan_le *)memblk;
 689         p2p_params->type = 'E';
 690
 691         /* determine the scan engine parameters */
 692         sparams = &p2p_params->eparams.params_le;
 693         sparams->bss_type = DOT11_BSSTYPE_ANY;
 694         if (p2p->cfg->active_scan)
 695                 sparams->scan_type = 0;
 696         else
 697                 sparams->scan_type = 1;
 698
 699         eth_broadcast_addr(sparams->bssid);
 700         if (ssid.SSID_len)
 701                 memcpy(sparams->ssid_le.SSID, ssid.SSID, ssid.SSID_len);
 702         sparams->ssid_le.SSID_len = cpu_to_le32(ssid.SSID_len);
 703         sparams->home_time = cpu_to_le32(P2PAPI_SCAN_HOME_TIME_MS);
 704
 705         /*
 706          * SOCIAL_CHAN_CNT + 1 takes care of the Progressive scan
 707          * supported by the supplicant.
 708          */
 709         if (num_chans == SOCIAL_CHAN_CNT || num_chans == (SOCIAL_CHAN_CNT + 1))
 710                 active = P2PAPI_SCAN_SOCIAL_DWELL_TIME_MS;
 711         else if (num_chans == AF_PEER_SEARCH_CNT)
 712                 active = P2PAPI_SCAN_AF_SEARCH_DWELL_TIME_MS;
 713         else if (brcmf_get_vif_state_any(p2p->cfg, BRCMF_VIF_STATUS_CONNECTED))
 714                 active = -1;
 715         else
 716                 active = P2PAPI_SCAN_DWELL_TIME_MS;
 717
 718         /* Override scan params to find a peer for a connection */
 719         if (num_chans == 1) {
 720                 active = WL_SCAN_CONNECT_DWELL_TIME_MS;
 721                 /* WAR to sync with presence period of VSDB GO.
 722                  * send probe request more frequently
 723                  */
 724                 nprobes = active / WL_SCAN_JOIN_PROBE_INTERVAL_MS;
 725         } else {
 726                 nprobes = active / P2PAPI_SCAN_NPROBS_TIME_MS;
 727         }
 728
 729         if (nprobes <= 0)
 730                 nprobes = 1;
 731
 732         brcmf_dbg(INFO, "nprobes # %d, active_time %d\n", nprobes, active);
 733         sparams->active_time = cpu_to_le32(active);
 734         sparams->nprobes = cpu_to_le32(nprobes);
 735         sparams->passive_time = cpu_to_le32(-1);
 736         sparams->channel_num = cpu_to_le32(num_chans &
 737                                            BRCMF_SCAN_PARAMS_COUNT_MASK);
 738         for (i = 0; i < num_chans; i++)
 739                 sparams->channel_list[i] = cpu_to_le16(chanspecs[i]);
 740
 741         /* set the escan specific parameters */
 742         p2p_params->eparams.version = cpu_to_le32(BRCMF_ESCAN_REQ_VERSION);
 743         p2p_params->eparams.action =  cpu_to_le16(action);
 744         p2p_params->eparams.sync_id = cpu_to_le16(0x1234);
 745         /* perform p2p scan on primary device */
 746         ret = brcmf_fil_bsscfg_data_set(vif->ifp, "p2p_scan", memblk, memsize);
 747         if (!ret)
 748                 set_bit(BRCMF_SCAN_STATUS_BUSY, &p2p->cfg->scan_status);
 749 exit:
 750         kfree(memblk);
 751         return ret;
 752 }
 753
 754 /**
 755  * brcmf_p2p_run_escan() - escan callback for peer-to-peer.
 756  *
 757  * @cfg: driver private data for cfg80211 interface.
 758  * @ndev: net device for which scan is requested.
 759  * @request: scan request from cfg80211.
 760  * @action: scan action.
 761  *
 762  * Determines the P2P discovery state based to scan request parameters and
 763  * validates the channels in the request.
 764  */
 765 static s32 brcmf_p2p_run_escan(struct brcmf_cfg80211_info *cfg,
 766                                struct brcmf_if *ifp,
 767                                struct cfg80211_scan_request *request,
 768                                u16 action)
 769 {
 770         struct brcmf_p2p_info *p2p = &cfg->p2p;
 771         s32 err = 0;
 772         s32 search_state = WL_P2P_DISC_ST_SCAN;
 773         struct brcmf_cfg80211_vif *vif;
 774         struct net_device *dev = NULL;
 775         int i, num_nodfs = 0;
 776         u16 *chanspecs;
 777
 778         brcmf_dbg(TRACE, "enter\n");
 779
 780         if (!request) {
 781                 err = -EINVAL;
 782                 goto exit;
 783         }
 784
 785         if (request->n_channels) {
 786                 chanspecs = kcalloc(request->n_channels, sizeof(*chanspecs),
 787                                     GFP_KERNEL);
 788                 if (!chanspecs) {
 789                         err = -ENOMEM;
 790                         goto exit;
 791                 }
 792                 vif = p2p->bss_idx[P2PAPI_BSSCFG_CONNECTION].vif;
 793                 if (vif)
 794                         dev = vif->wdev.netdev;
 795                 if (request->n_channels == 3 &&
 796                     request->channels[0]->hw_value == SOCIAL_CHAN_1 &&
 797                     request->channels[1]->hw_value == SOCIAL_CHAN_2 &&
 798                     request->channels[2]->hw_value == SOCIAL_CHAN_3) {
 799                         /* SOCIAL CHANNELS 1, 6, 11 */
 800                         search_state = WL_P2P_DISC_ST_SEARCH;
 801                         brcmf_dbg(INFO, "P2P SEARCH PHASE START\n");
 802                 } else if (dev != NULL &&
 803                            vif->wdev.iftype == NL80211_IFTYPE_P2P_GO) {
 804                         /* If you are already a GO, then do SEARCH only */
 805                         brcmf_dbg(INFO, "Already a GO. Do SEARCH Only\n");
 806                         search_state = WL_P2P_DISC_ST_SEARCH;
 807                 } else {
 808                         brcmf_dbg(INFO, "P2P SCAN STATE START\n");
 809                 }
 810
 811                 /*
 812                  * no P2P scanning on passive or DFS channels.
 813                  */
 814                 for (i = 0; i < request->n_channels; i++) {
 815                         struct ieee80211_channel *chan = request->channels[i];
 816
 817                         if (chan->flags & (IEEE80211_CHAN_RADAR |
 818                                            IEEE80211_CHAN_NO_IR))
 819                                 continue;
 820
 821                         chanspecs[i] = channel_to_chanspec(&p2p->cfg->d11inf,
 822                                                            chan);
 823                         brcmf_dbg(INFO, "%d: chan=%d, channel spec=%x\n",
 824                                   num_nodfs, chan->hw_value, chanspecs[i]);
 825                         num_nodfs++;
 826                 }
 827                 err = brcmf_p2p_escan(p2p, num_nodfs, chanspecs, search_state,
 828                                       action, P2PAPI_BSSCFG_DEVICE);
 829                 kfree(chanspecs);
 830         }
 831 exit:
 832         if (err)
 833                 brcmf_err("error (%d)\n", err);
 834         return err;
 835 }
 836
 837
 838 /**
 839  * brcmf_p2p_find_listen_channel() - find listen channel in ie string.
 840  *
 841  * @ie: string of information elements.
 842  * @ie_len: length of string.
 843  *
 844  * Scan ie for p2p ie and look for attribute 6 channel. If available determine
 845  * channel and return it.
 846  */
 847 static s32 brcmf_p2p_find_listen_channel(const u8 *ie, u32 ie_len)
 848 {
 849         u8 channel_ie[5];
 850         s32 listen_channel;
 851         s32 err;
 852
 853         err = cfg80211_get_p2p_attr(ie, ie_len,
 854                                     IEEE80211_P2P_ATTR_LISTEN_CHANNEL,
 855                                     channel_ie, sizeof(channel_ie));
 856         if (err < 0)
 857                 return err;
 858
 859         /* listen channel subel length format:     */
 860         /* 3(country) + 1(op. class) + 1(chan num) */
 861         listen_channel = (s32)channel_ie[3 + 1];
 862
 863         if (listen_channel == SOCIAL_CHAN_1 ||
 864             listen_channel == SOCIAL_CHAN_2 ||
 865             listen_channel == SOCIAL_CHAN_3) {
 866                 brcmf_dbg(INFO, "Found my Listen Channel %d\n", listen_channel);
 867                 return listen_channel;
 868         }
 869
 870         return -EPERM;
 871 }
 872
 873
 874 /**
 875  * brcmf_p2p_scan_prep() - prepare scan based on request.
 876  *
 877  * @wiphy: wiphy device.
 878  * @request: scan request from cfg80211.
 879  * @vif: vif on which scan request is to be executed.
 880  *
 881  * Prepare the scan appropriately for type of scan requested. Overrides the
 882  * escan .run() callback for peer-to-peer scanning.
 883  */
 884 int brcmf_p2p_scan_prep(struct wiphy *wiphy,
 885                         struct cfg80211_scan_request *request,
 886                         struct brcmf_cfg80211_vif *vif)
 887 {
 888         struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
 889         struct brcmf_p2p_info *p2p = &cfg->p2p;
 890         int err = 0;
 891
 892         if (brcmf_p2p_scan_is_p2p_request(request)) {
 893                 /* find my listen channel */
 894                 err = brcmf_p2p_find_listen_channel(request->ie,
 895                                                     request->ie_len);
 896                 if (err < 0)
 897                         return err;
 898
 899                 p2p->afx_hdl.my_listen_chan = err;
 900
 901                 clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status);
 902                 brcmf_dbg(INFO, "P2P: GO_NEG_PHASE status cleared\n");
 903
 904                 err = brcmf_p2p_enable_discovery(p2p);
 905                 if (err)
 906                         return err;
 907
 908                 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif;
 909
 910                 /* override .run_escan() callback. */
 911                 cfg->escan_info.run = brcmf_p2p_run_escan;
 912         }
 913         err = brcmf_vif_set_mgmt_ie(vif, BRCMF_VNDR_IE_PRBREQ_FLAG,
 914                                     request->ie, request->ie_len);
 915         return err;
 916 }
 917
 918
 919 /**
 920  * brcmf_p2p_discover_listen() - set firmware to discover listen state.
 921  *
 922  * @p2p: p2p device.
 923  * @channel: channel nr for discover listen.
 924  * @duration: time in ms to stay on channel.
 925  *
 926  */
 927 static s32
 928 brcmf_p2p_discover_listen(struct brcmf_p2p_info *p2p, u16 channel, u32 duration)
 929 {
 930         struct brcmf_cfg80211_vif *vif;
 931         struct brcmu_chan ch;
 932         s32 err = 0;
 933
 934         vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif;
 935         if (!vif) {
 936                 brcmf_err("Discovery is not set, so we have nothing to do\n");
 937                 err = -EPERM;
 938                 goto exit;
 939         }
 940
 941         if (test_bit(BRCMF_P2P_STATUS_DISCOVER_LISTEN, &p2p->status)) {
 942                 brcmf_err("Previous LISTEN is not completed yet\n");
 943                 /* WAR: prevent cookie mismatch in wpa_supplicant return OK */
 944                 goto exit;
 945         }
 946
 947         ch.chnum = channel;
 948         ch.bw = BRCMU_CHAN_BW_20;
 949         p2p->cfg->d11inf.encchspec(&ch);
 950         err = brcmf_p2p_set_discover_state(vif->ifp, WL_P2P_DISC_ST_LISTEN,
 951                                            ch.chspec, (u16)duration);
 952         if (!err) {
 953                 set_bit(BRCMF_P2P_STATUS_DISCOVER_LISTEN, &p2p->status);
 954                 p2p->remain_on_channel_cookie++;
 955         }
 956 exit:
 957         return err;
 958 }
 959
 960
 961 /**
 962  * brcmf_p2p_remain_on_channel() - put device on channel and stay there.
 963  *
 964  * @wiphy: wiphy device.
 965  * @channel: channel to stay on.
 966  * @duration: time in ms to remain on channel.
 967  *
 968  */
 969 int brcmf_p2p_remain_on_channel(struct wiphy *wiphy, struct wireless_dev *wdev,
 970                                 struct ieee80211_channel *channel,
 971                                 unsigned int duration, u64 *cookie)
 972 {
 973         struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
 974         struct brcmf_p2p_info *p2p = &cfg->p2p;
 975         s32 err;
 976         u16 channel_nr;
 977
 978         channel_nr = ieee80211_frequency_to_channel(channel->center_freq);
 979         brcmf_dbg(TRACE, "Enter, channel: %d, duration ms (%d)\n", channel_nr,
 980                   duration);
 981
 982         err = brcmf_p2p_enable_discovery(p2p);
 983         if (err)
 984                 goto exit;
 985         err = brcmf_p2p_discover_listen(p2p, channel_nr, duration);
 986         if (err)
 987                 goto exit;
 988
 989         memcpy(&p2p->remain_on_channel, channel, sizeof(*channel));
 990         *cookie = p2p->remain_on_channel_cookie;
 991         cfg80211_ready_on_channel(wdev, *cookie, channel, duration, GFP_KERNEL);
 992
 993 exit:
 994         return err;
 995 }
 996
 997
 998 /**
 999  * brcmf_p2p_notify_listen_complete() - p2p listen has completed.
1000  *
1001  * @ifp: interfac control.
1002  * @e: event message. Not used, to make it usable for fweh event dispatcher.
1003  * @data: payload of message. Not used.
1004  *
1005  */
1006 int brcmf_p2p_notify_listen_complete(struct brcmf_if *ifp,
1007                                      const struct brcmf_event_msg *e,
1008                                      void *data)
1009 {
1010         struct brcmf_cfg80211_info *cfg = ifp->drvr->config;
1011         struct brcmf_p2p_info *p2p = &cfg->p2p;
1012
1013         brcmf_dbg(TRACE, "Enter\n");
1014         if (test_and_clear_bit(BRCMF_P2P_STATUS_DISCOVER_LISTEN,
1015                                &p2p->status)) {
1016                 if (test_and_clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_AF_LISTEN,
1017                                        &p2p->status)) {
1018                         clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME,
1019                                   &p2p->status);
1020                         brcmf_dbg(INFO, "Listen DONE, wake up wait_next_af\n");
1021                         complete(&p2p->wait_next_af);
1022                 }
1023
1024                 cfg80211_remain_on_channel_expired(&ifp->vif->wdev,
1025                                                    p2p->remain_on_channel_cookie,
1026                                                    &p2p->remain_on_channel,
1027                                                    GFP_KERNEL);
1028         }
1029         return 0;
1030 }
1031
1032
1033 /**
1034  * brcmf_p2p_cancel_remain_on_channel() - cancel p2p listen state.
1035  *
1036  * @ifp: interfac control.
1037  *
1038  */
1039 void brcmf_p2p_cancel_remain_on_channel(struct brcmf_if *ifp)
1040 {
1041         if (!ifp)
1042                 return;
1043         brcmf_p2p_set_discover_state(ifp, WL_P2P_DISC_ST_SCAN, 0, 0);
1044         brcmf_p2p_notify_listen_complete(ifp, NULL, NULL);
1045 }
1046
1047
1048 /**
1049  * brcmf_p2p_act_frm_search() - search function for action frame.
1050  *
1051  * @p2p: p2p device.
1052  * channel: channel on which action frame is to be trasmitted.
1053  *
1054  * search function to reach at common channel to send action frame. When
1055  * channel is 0 then all social channels will be used to send af
1056  */
1057 static s32 brcmf_p2p_act_frm_search(struct brcmf_p2p_info *p2p, u16 channel)
1058 {
1059         s32 err;
1060         u32 channel_cnt;
1061         u16 *default_chan_list;
1062         u32 i;
1063         struct brcmu_chan ch;
1064
1065         brcmf_dbg(TRACE, "Enter\n");
1066
1067         if (channel)
1068                 channel_cnt = AF_PEER_SEARCH_CNT;
1069         else
1070                 channel_cnt = SOCIAL_CHAN_CNT;
1071         default_chan_list = kzalloc(channel_cnt * sizeof(*default_chan_list),
1072                                     GFP_KERNEL);
1073         if (default_chan_list == NULL) {
1074                 brcmf_err("channel list allocation failed\n");
1075                 err = -ENOMEM;
1076                 goto exit;
1077         }
1078         ch.bw = BRCMU_CHAN_BW_20;
1079         if (channel) {
1080                 ch.chnum = channel;
1081                 p2p->cfg->d11inf.encchspec(&ch);
1082                 /* insert same channel to the chan_list */
1083                 for (i = 0; i < channel_cnt; i++)
1084                         default_chan_list[i] = ch.chspec;
1085         } else {
1086                 ch.chnum = SOCIAL_CHAN_1;
1087                 p2p->cfg->d11inf.encchspec(&ch);
1088                 default_chan_list[0] = ch.chspec;
1089                 ch.chnum = SOCIAL_CHAN_2;
1090                 p2p->cfg->d11inf.encchspec(&ch);
1091                 default_chan_list[1] = ch.chspec;
1092                 ch.chnum = SOCIAL_CHAN_3;
1093                 p2p->cfg->d11inf.encchspec(&ch);
1094                 default_chan_list[2] = ch.chspec;
1095         }
1096         err = brcmf_p2p_escan(p2p, channel_cnt, default_chan_list,
1097                               WL_P2P_DISC_ST_SEARCH, WL_ESCAN_ACTION_START,
1098                               P2PAPI_BSSCFG_DEVICE);
1099         kfree(default_chan_list);
1100 exit:
1101         return err;
1102 }
1103
1104
1105 /**
1106  * brcmf_p2p_afx_handler() - afx worker thread.
1107  *
1108  * @work:
1109  *
1110  */
1111 static void brcmf_p2p_afx_handler(struct work_struct *work)
1112 {
1113         struct afx_hdl *afx_hdl = container_of(work, struct afx_hdl, afx_work);
1114         struct brcmf_p2p_info *p2p = container_of(afx_hdl,
1115                                                   struct brcmf_p2p_info,
1116                                                   afx_hdl);
1117         s32 err;
1118
1119         if (!afx_hdl->is_active)
1120                 return;
1121
1122         if (afx_hdl->is_listen && afx_hdl->my_listen_chan)
1123                 /* 100ms ~ 300ms */
1124                 err = brcmf_p2p_discover_listen(p2p, afx_hdl->my_listen_chan,
1125                                                 100 * (1 + prandom_u32() % 3));
1126         else
1127                 err = brcmf_p2p_act_frm_search(p2p, afx_hdl->peer_listen_chan);
1128
1129         if (err) {
1130                 brcmf_err("ERROR occurred! value is (%d)\n", err);
1131                 if (test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL,
1132                              &p2p->status))
1133                         complete(&afx_hdl->act_frm_scan);
1134         }
1135 }
1136
1137
1138 /**
1139  * brcmf_p2p_af_searching_channel() - search channel.
1140  *
1141  * @p2p: p2p device info struct.
1142  *
1143  */
1144 static s32 brcmf_p2p_af_searching_channel(struct brcmf_p2p_info *p2p)
1145 {
1146         struct afx_hdl *afx_hdl = &p2p->afx_hdl;
1147         struct brcmf_cfg80211_vif *pri_vif;
1148         unsigned long duration;
1149         s32 retry;
1150
1151         brcmf_dbg(TRACE, "Enter\n");
1152
1153         pri_vif = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif;
1154
1155         reinit_completion(&afx_hdl->act_frm_scan);
1156         set_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status);
1157         afx_hdl->is_active = true;
1158         afx_hdl->peer_chan = P2P_INVALID_CHANNEL;
1159
1160         /* Loop to wait until we find a peer's channel or the
1161          * pending action frame tx is cancelled.
1162          */
1163         retry = 0;
1164         duration = msecs_to_jiffies(P2P_AF_FRM_SCAN_MAX_WAIT);
1165         while ((retry < P2P_CHANNEL_SYNC_RETRY) &&
1166                (afx_hdl->peer_chan == P2P_INVALID_CHANNEL)) {
1167                 afx_hdl->is_listen = false;
1168                 brcmf_dbg(TRACE, "Scheduling action frame for sending.. (%d)\n",
1169                           retry);
1170                 /* search peer on peer's listen channel */
1171                 schedule_work(&afx_hdl->afx_work);
1172                 wait_for_completion_timeout(&afx_hdl->act_frm_scan, duration);
1173                 if ((afx_hdl->peer_chan != P2P_INVALID_CHANNEL) ||
1174                     (!test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL,
1175                                &p2p->status)))
1176                         break;
1177
1178                 if (afx_hdl->my_listen_chan) {
1179                         brcmf_dbg(TRACE, "Scheduling listen peer, channel=%d\n",
1180                                   afx_hdl->my_listen_chan);
1181                         /* listen on my listen channel */
1182                         afx_hdl->is_listen = true;
1183                         schedule_work(&afx_hdl->afx_work);
1184                         wait_for_completion_timeout(&afx_hdl->act_frm_scan,
1185                                                     duration);
1186                 }
1187                 if ((afx_hdl->peer_chan != P2P_INVALID_CHANNEL) ||
1188                     (!test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL,
1189                                &p2p->status)))
1190                         break;
1191                 retry++;
1192
1193                 /* if sta is connected or connecting, sleep for a while before
1194                  * retry af tx or finding a peer
1195                  */
1196                 if (test_bit(BRCMF_VIF_STATUS_CONNECTED, &pri_vif->sme_state) ||
1197                     test_bit(BRCMF_VIF_STATUS_CONNECTING, &pri_vif->sme_state))
1198                         msleep(P2P_DEFAULT_SLEEP_TIME_VSDB);
1199         }
1200
1201         brcmf_dbg(TRACE, "Completed search/listen peer_chan=%d\n",
1202                   afx_hdl->peer_chan);
1203         afx_hdl->is_active = false;
1204
1205         clear_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status);
1206
1207         return afx_hdl->peer_chan;
1208 }
1209
1210
1211 /**
1212  * brcmf_p2p_scan_finding_common_channel() - was escan used for finding channel
1213  *
1214  * @cfg: common configuration struct.
1215  * @bi: bss info struct, result from scan.
1216  *
1217  */
1218 bool brcmf_p2p_scan_finding_common_channel(struct brcmf_cfg80211_info *cfg,
1219                                            struct brcmf_bss_info_le *bi)
1220
1221 {
1222         struct brcmf_p2p_info *p2p = &cfg->p2p;
1223         struct afx_hdl *afx_hdl = &p2p->afx_hdl;
1224         struct brcmu_chan ch;
1225         u8 *ie;
1226         s32 err;
1227         u8 p2p_dev_addr[ETH_ALEN];
1228
1229         if (!test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status))
1230                 return false;
1231
1232         if (bi == NULL) {
1233                 brcmf_dbg(TRACE, "ACTION FRAME SCAN Done\n");
1234                 if (afx_hdl->peer_chan == P2P_INVALID_CHANNEL)
1235                         complete(&afx_hdl->act_frm_scan);
1236                 return true;
1237         }
1238
1239         ie = ((u8 *)bi) + le16_to_cpu(bi->ie_offset);
1240         memset(p2p_dev_addr, 0, sizeof(p2p_dev_addr));
1241         err = cfg80211_get_p2p_attr(ie, le32_to_cpu(bi->ie_length),
1242                                     IEEE80211_P2P_ATTR_DEVICE_INFO,
1243                                     p2p_dev_addr, sizeof(p2p_dev_addr));
1244         if (err < 0)
1245                 err = cfg80211_get_p2p_attr(ie, le32_to_cpu(bi->ie_length),
1246                                             IEEE80211_P2P_ATTR_DEVICE_ID,
1247                                             p2p_dev_addr, sizeof(p2p_dev_addr));
1248         if ((err >= 0) &&
1249             (ether_addr_equal(p2p_dev_addr, afx_hdl->tx_dst_addr))) {
1250                 if (!bi->ctl_ch) {
1251                         ch.chspec = le16_to_cpu(bi->chanspec);
1252                         cfg->d11inf.decchspec(&ch);
1253                         bi->ctl_ch = ch.chnum;
1254                 }
1255                 afx_hdl->peer_chan = bi->ctl_ch;
1256                 brcmf_dbg(TRACE, "ACTION FRAME SCAN : Peer %pM found, channel : %d\n",
1257                           afx_hdl->tx_dst_addr, afx_hdl->peer_chan);
1258                 complete(&afx_hdl->act_frm_scan);
1259         }
1260         return true;
1261 }
1262
1263 /**
1264  * brcmf_p2p_stop_wait_next_action_frame() - finish scan if af tx complete.
1265  *
1266  * @cfg: common configuration struct.
1267  *
1268  */
1269 static void
1270 brcmf_p2p_stop_wait_next_action_frame(struct brcmf_cfg80211_info *cfg)
1271 {
1272         struct brcmf_p2p_info *p2p = &cfg->p2p;
1273         struct brcmf_if *ifp = cfg->escan_info.ifp;
1274
1275         if (test_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status) &&
1276             (test_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status) ||
1277              test_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status))) {
1278                 brcmf_dbg(TRACE, "*** Wake UP ** abort actframe iovar\n");
1279                 /* if channel is not zero, "actfame" uses off channel scan.
1280                  * So abort scan for off channel completion.
1281                  */
1282                 if (p2p->af_sent_channel)
1283                         brcmf_notify_escan_complete(cfg, ifp, true, true);
1284         } else if (test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_AF_LISTEN,
1285                             &p2p->status)) {
1286                 brcmf_dbg(TRACE, "*** Wake UP ** abort listen for next af frame\n");
1287                 /* So abort scan to cancel listen */
1288                 brcmf_notify_escan_complete(cfg, ifp, true, true);
1289         }
1290 }
1291
1292
1293 /**
1294  * brcmf_p2p_gon_req_collision() - Check if go negotiaton collission
1295  *
1296  * @p2p: p2p device info struct.
1297  *
1298  * return true if recevied action frame is to be dropped.
1299  */
1300 static bool
1301 brcmf_p2p_gon_req_collision(struct brcmf_p2p_info *p2p, u8 *mac)
1302 {
1303         struct brcmf_cfg80211_info *cfg = p2p->cfg;
1304         struct brcmf_if *ifp;
1305
1306         brcmf_dbg(TRACE, "Enter\n");
1307
1308         if (!test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status) ||
1309             !p2p->gon_req_action)
1310                 return false;
1311
1312         brcmf_dbg(TRACE, "GO Negotiation Request COLLISION !!!\n");
1313         /* if sa(peer) addr is less than da(my) addr, then this device
1314          * process peer's gon request and block to send gon req.
1315          * if not (sa addr > da addr),
1316          * this device will process gon request and drop gon req of peer.
1317          */
1318         ifp = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif->ifp;
1319         if (memcmp(mac, ifp->mac_addr, ETH_ALEN) < 0) {
1320                 brcmf_dbg(INFO, "Block transmit gon req !!!\n");
1321                 p2p->block_gon_req_tx = true;
1322                 /* if we are finding a common channel for sending af,
1323                  * do not scan more to block to send current gon req
1324                  */
1325                 if (test_and_clear_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL,
1326                                        &p2p->status))
1327                         complete(&p2p->afx_hdl.act_frm_scan);
1328                 if (test_and_clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME,
1329                                        &p2p->status))
1330                         brcmf_p2p_stop_wait_next_action_frame(cfg);
1331                 return false;
1332         }
1333
1334         /* drop gon request of peer to process gon request by this device. */
1335         brcmf_dbg(INFO, "Drop received gon req !!!\n");
1336
1337         return true;
1338 }
1339
1340
1341 /**
1342  * brcmf_p2p_notify_action_frame_rx() - received action frame.
1343  *
1344  * @ifp: interfac control.
1345  * @e: event message. Not used, to make it usable for fweh event dispatcher.
1346  * @data: payload of message, containing action frame data.
1347  *
1348  */
1349 int brcmf_p2p_notify_action_frame_rx(struct brcmf_if *ifp,
1350                                      const struct brcmf_event_msg *e,
1351                                      void *data)
1352 {
1353         struct brcmf_cfg80211_info *cfg = ifp->drvr->config;
1354         struct brcmf_p2p_info *p2p = &cfg->p2p;
1355         struct afx_hdl *afx_hdl = &p2p->afx_hdl;
1356         struct wireless_dev *wdev;
1357         u32 mgmt_frame_len = e->datalen - sizeof(struct brcmf_rx_mgmt_data);
1358         struct brcmf_rx_mgmt_data *rxframe = (struct brcmf_rx_mgmt_data *)data;
1359         u8 *frame = (u8 *)(rxframe + 1);
1360         struct brcmf_p2p_pub_act_frame *act_frm;
1361         struct brcmf_p2psd_gas_pub_act_frame *sd_act_frm;
1362         struct brcmu_chan ch;
1363         struct ieee80211_mgmt *mgmt_frame;
1364         s32 freq;
1365         u16 mgmt_type;
1366         u8 action;
1367
1368         if (e->datalen < sizeof(*rxframe)) {
1369                 brcmf_dbg(SCAN, "Event data to small. Ignore\n");
1370                 return 0;
1371         }
1372
1373         ch.chspec = be16_to_cpu(rxframe->chanspec);
1374         cfg->d11inf.decchspec(&ch);
1375         /* Check if wpa_supplicant has registered for this frame */
1376         brcmf_dbg(INFO, "ifp->vif->mgmt_rx_reg %04x\n", ifp->vif->mgmt_rx_reg);
1377         mgmt_type = (IEEE80211_STYPE_ACTION & IEEE80211_FCTL_STYPE) >> 4;
1378         if ((ifp->vif->mgmt_rx_reg & BIT(mgmt_type)) == 0)
1379                 return 0;
1380
1381         brcmf_p2p_print_actframe(false, frame, mgmt_frame_len);
1382
1383         action = P2P_PAF_SUBTYPE_INVALID;
1384         if (brcmf_p2p_is_pub_action(frame, mgmt_frame_len)) {
1385                 act_frm = (struct brcmf_p2p_pub_act_frame *)frame;
1386                 action = act_frm->subtype;
1387                 if ((action == P2P_PAF_GON_REQ) &&
1388                     (brcmf_p2p_gon_req_collision(p2p, (u8 *)e->addr))) {
1389                         if (test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL,
1390                                      &p2p->status) &&
1391                             (ether_addr_equal(afx_hdl->tx_dst_addr, e->addr))) {
1392                                 afx_hdl->peer_chan = ch.chnum;
1393                                 brcmf_dbg(INFO, "GON request: Peer found, channel=%d\n",
1394                                           afx_hdl->peer_chan);
1395                                 complete(&afx_hdl->act_frm_scan);
1396                         }
1397                         return 0;
1398                 }
1399                 /* After complete GO Negotiation, roll back to mpc mode */
1400                 if ((action == P2P_PAF_GON_CONF) ||
1401                     (action == P2P_PAF_PROVDIS_RSP))
1402                         brcmf_set_mpc(ifp, 1);
1403                 if (action == P2P_PAF_GON_CONF) {
1404                         brcmf_dbg(TRACE, "P2P: GO_NEG_PHASE status cleared\n");
1405                         clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status);
1406                 }
1407         } else if (brcmf_p2p_is_gas_action(frame, mgmt_frame_len)) {
1408                 sd_act_frm = (struct brcmf_p2psd_gas_pub_act_frame *)frame;
1409                 action = sd_act_frm->action;
1410         }
1411
1412         if (test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status) &&
1413             (p2p->next_af_subtype == action)) {
1414                 brcmf_dbg(TRACE, "We got a right next frame! (%d)\n", action);
1415                 clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME,
1416                           &p2p->status);
1417                 /* Stop waiting for next AF. */
1418                 brcmf_p2p_stop_wait_next_action_frame(cfg);
1419         }
1420
1421         mgmt_frame = kzalloc(offsetof(struct ieee80211_mgmt, u) +
1422                              mgmt_frame_len, GFP_KERNEL);
1423         if (!mgmt_frame) {
1424                 brcmf_err("No memory available for action frame\n");
1425                 return -ENOMEM;
1426         }
1427         memcpy(mgmt_frame->da, ifp->mac_addr, ETH_ALEN);
1428         brcmf_fil_cmd_data_get(ifp, BRCMF_C_GET_BSSID, mgmt_frame->bssid,
1429                                ETH_ALEN);
1430         memcpy(mgmt_frame->sa, e->addr, ETH_ALEN);
1431         mgmt_frame->frame_control = cpu_to_le16(IEEE80211_STYPE_ACTION);
1432         memcpy(&mgmt_frame->u, frame, mgmt_frame_len);
1433         mgmt_frame_len += offsetof(struct ieee80211_mgmt, u);
1434
1435         freq = ieee80211_channel_to_frequency(ch.chnum,
1436                                               ch.band == BRCMU_CHAN_BAND_2G ?
1437                                               IEEE80211_BAND_2GHZ :
1438                                               IEEE80211_BAND_5GHZ);
1439
1440         wdev = &ifp->vif->wdev;
1441         cfg80211_rx_mgmt(wdev, freq, 0, (u8 *)mgmt_frame, mgmt_frame_len, 0);
1442
1443         kfree(mgmt_frame);
1444         return 0;
1445 }
1446
1447
1448 /**
1449  * brcmf_p2p_notify_action_tx_complete() - transmit action frame complete
1450  *
1451  * @ifp: interfac control.
1452  * @e: event message. Not used, to make it usable for fweh event dispatcher.
1453  * @data: not used.
1454  *
1455  */
1456 int brcmf_p2p_notify_action_tx_complete(struct brcmf_if *ifp,
1457                                         const struct brcmf_event_msg *e,
1458                                         void *data)
1459 {
1460         struct brcmf_cfg80211_info *cfg = ifp->drvr->config;
1461         struct brcmf_p2p_info *p2p = &cfg->p2p;
1462
1463         brcmf_dbg(INFO, "Enter: event %s, status=%d\n",
1464                   e->event_code == BRCMF_E_ACTION_FRAME_OFF_CHAN_COMPLETE ?
1465                   "ACTION_FRAME_OFF_CHAN_COMPLETE" : "ACTION_FRAME_COMPLETE",
1466                   e->status);
1467
1468         if (!test_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status))
1469                 return 0;
1470
1471         if (e->event_code == BRCMF_E_ACTION_FRAME_COMPLETE) {
1472                 if (e->status == BRCMF_E_STATUS_SUCCESS) {
1473                         set_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED,
1474                                 &p2p->status);
1475                         if (!p2p->wait_for_offchan_complete)
1476                                 complete(&p2p->send_af_done);
1477                 } else {
1478                         set_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status);
1479                         /* If there is no ack, we don't need to wait for
1480                          * WLC_E_ACTION_FRAME_OFFCHAN_COMPLETE event
1481                          */
1482                         brcmf_p2p_stop_wait_next_action_frame(cfg);
1483                 }
1484
1485         } else {
1486                 complete(&p2p->send_af_done);
1487         }
1488         return 0;
1489 }
1490
1491
1492 /**
1493  * brcmf_p2p_tx_action_frame() - send action frame over fil.
1494  *
1495  * @p2p: p2p info struct for vif.
1496  * @af_params: action frame data/info.
1497  *
1498  * Send an action frame immediately without doing channel synchronization.
1499  *
1500  * This function waits for a completion event before returning.
1501  * The WLC_E_ACTION_FRAME_COMPLETE event will be received when the action
1502  * frame is transmitted.
1503  */
1504 static s32 brcmf_p2p_tx_action_frame(struct brcmf_p2p_info *p2p,
1505                                      struct brcmf_fil_af_params_le *af_params)
1506 {
1507         struct brcmf_cfg80211_vif *vif;
1508         s32 err = 0;
1509         s32 timeout = 0;
1510
1511         brcmf_dbg(TRACE, "Enter\n");
1512
1513         reinit_completion(&p2p->send_af_done);
1514         clear_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status);
1515         clear_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status);
1516
1517         vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif;
1518         err = brcmf_fil_bsscfg_data_set(vif->ifp, "actframe", af_params,
1519                                         sizeof(*af_params));
1520         if (err) {
1521                 brcmf_err(" sending action frame has failed\n");
1522                 goto exit;
1523         }
1524
1525         p2p->af_sent_channel = le32_to_cpu(af_params->channel);
1526         p2p->af_tx_sent_jiffies = jiffies;
1527
1528         if (test_bit(BRCMF_P2P_STATUS_DISCOVER_LISTEN, &p2p->status) &&
1529             p2p->af_sent_channel ==
1530             ieee80211_frequency_to_channel(p2p->remain_on_channel.center_freq))
1531                 p2p->wait_for_offchan_complete = false;
1532         else
1533                 p2p->wait_for_offchan_complete = true;
1534
1535         brcmf_dbg(TRACE, "Waiting for %s tx completion event\n",
1536                   (p2p->wait_for_offchan_complete) ?
1537                    "off-channel" : "on-channel");
1538
1539         timeout = wait_for_completion_timeout(&p2p->send_af_done,
1540                                         msecs_to_jiffies(P2P_AF_MAX_WAIT_TIME));
1541
1542         if (test_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status)) {
1543                 brcmf_dbg(TRACE, "TX action frame operation is success\n");
1544         } else {
1545                 err = -EIO;
1546                 brcmf_dbg(TRACE, "TX action frame operation has failed\n");
1547         }
1548         /* clear status bit for action tx */
1549         clear_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status);
1550         clear_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status);
1551
1552 exit:
1553         return err;
1554 }
1555
1556
1557 /**
1558  * brcmf_p2p_pub_af_tx() - public action frame tx routine.
1559  *
1560  * @cfg: driver private data for cfg80211 interface.
1561  * @af_params: action frame data/info.
1562  * @config_af_params: configuration data for action frame.
1563  *
1564  * routine which transmits ation frame public type.
1565  */
1566 static s32 brcmf_p2p_pub_af_tx(struct brcmf_cfg80211_info *cfg,
1567                                struct brcmf_fil_af_params_le *af_params,
1568                                struct brcmf_config_af_params *config_af_params)
1569 {
1570         struct brcmf_p2p_info *p2p = &cfg->p2p;
1571         struct brcmf_fil_action_frame_le *action_frame;
1572         struct brcmf_p2p_pub_act_frame *act_frm;
1573         s32 err = 0;
1574         u16 ie_len;
1575
1576         action_frame = &af_params->action_frame;
1577         act_frm = (struct brcmf_p2p_pub_act_frame *)(action_frame->data);
1578
1579         config_af_params->extra_listen = true;
1580
1581         switch (act_frm->subtype) {
1582         case P2P_PAF_GON_REQ:
1583                 brcmf_dbg(TRACE, "P2P: GO_NEG_PHASE status set\n");
1584                 set_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status);
1585                 config_af_params->mpc_onoff = 0;
1586                 config_af_params->search_channel = true;
1587                 p2p->next_af_subtype = act_frm->subtype + 1;
1588                 p2p->gon_req_action = true;
1589                 /* increase dwell time to wait for RESP frame */
1590                 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME);
1591                 break;
1592         case P2P_PAF_GON_RSP:
1593                 p2p->next_af_subtype = act_frm->subtype + 1;
1594                 /* increase dwell time to wait for CONF frame */
1595                 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME);
1596                 break;
1597         case P2P_PAF_GON_CONF:
1598                 /* If we reached till GO Neg confirmation reset the filter */
1599                 brcmf_dbg(TRACE, "P2P: GO_NEG_PHASE status cleared\n");
1600                 clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status);
1601                 /* turn on mpc again if go nego is done */
1602                 config_af_params->mpc_onoff = 1;
1603                 /* minimize dwell time */
1604                 af_params->dwell_time = cpu_to_le32(P2P_AF_MIN_DWELL_TIME);
1605                 config_af_params->extra_listen = false;
1606                 break;
1607         case P2P_PAF_INVITE_REQ:
1608                 config_af_params->search_channel = true;
1609                 p2p->next_af_subtype = act_frm->subtype + 1;
1610                 /* increase dwell time */
1611                 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME);
1612                 break;
1613         case P2P_PAF_INVITE_RSP:
1614                 /* minimize dwell time */
1615                 af_params->dwell_time = cpu_to_le32(P2P_AF_MIN_DWELL_TIME);
1616                 config_af_params->extra_listen = false;
1617                 break;
1618         case P2P_PAF_DEVDIS_REQ:
1619                 config_af_params->search_channel = true;
1620                 p2p->next_af_subtype = act_frm->subtype + 1;
1621                 /* maximize dwell time to wait for RESP frame */
1622                 af_params->dwell_time = cpu_to_le32(P2P_AF_LONG_DWELL_TIME);
1623                 break;
1624         case P2P_PAF_DEVDIS_RSP:
1625                 /* minimize dwell time */
1626                 af_params->dwell_time = cpu_to_le32(P2P_AF_MIN_DWELL_TIME);
1627                 config_af_params->extra_listen = false;
1628                 break;
1629         case P2P_PAF_PROVDIS_REQ:
1630                 ie_len = le16_to_cpu(action_frame->len) -
1631                          offsetof(struct brcmf_p2p_pub_act_frame, elts);
1632                 if (cfg80211_get_p2p_attr(&act_frm->elts[0], ie_len,
1633                                           IEEE80211_P2P_ATTR_GROUP_ID,
1634                                           NULL, 0) < 0)
1635                         config_af_params->search_channel = true;
1636                 config_af_params->mpc_onoff = 0;
1637                 p2p->next_af_subtype = act_frm->subtype + 1;
1638                 /* increase dwell time to wait for RESP frame */
1639                 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME);
1640                 break;
1641         case P2P_PAF_PROVDIS_RSP:
1642                 /* wpa_supplicant send go nego req right after prov disc */
1643                 p2p->next_af_subtype = P2P_PAF_GON_REQ;
1644                 /* increase dwell time to MED level */
1645                 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME);
1646                 config_af_params->extra_listen = false;
1647                 break;
1648         default:
1649                 brcmf_err("Unknown p2p pub act frame subtype: %d\n",
1650                           act_frm->subtype);
1651                 err = -EINVAL;
1652         }
1653         return err;
1654 }
1655
1656 /**
1657  * brcmf_p2p_send_action_frame() - send action frame .
1658  *
1659  * @cfg: driver private data for cfg80211 interface.
1660  * @ndev: net device to transmit on.
1661  * @af_params: configuration data for action frame.
1662  */
1663 bool brcmf_p2p_send_action_frame(struct brcmf_cfg80211_info *cfg,
1664                                  struct net_device *ndev,
1665                                  struct brcmf_fil_af_params_le *af_params)
1666 {
1667         struct brcmf_p2p_info *p2p = &cfg->p2p;
1668         struct brcmf_if *ifp = netdev_priv(ndev);
1669         struct brcmf_fil_action_frame_le *action_frame;
1670         struct brcmf_config_af_params config_af_params;
1671         struct afx_hdl *afx_hdl = &p2p->afx_hdl;
1672         u16 action_frame_len;
1673         bool ack = false;
1674         u8 category;
1675         u8 action;
1676         s32 tx_retry;
1677         s32 extra_listen_time;
1678         uint delta_ms;
1679
1680         action_frame = &af_params->action_frame;
1681         action_frame_len = le16_to_cpu(action_frame->len);
1682
1683         brcmf_p2p_print_actframe(true, action_frame->data, action_frame_len);
1684
1685         /* Add the default dwell time. Dwell time to stay off-channel */
1686         /* to wait for a response action frame after transmitting an  */
1687         /* GO Negotiation action frame                                */
1688         af_params->dwell_time = cpu_to_le32(P2P_AF_DWELL_TIME);
1689
1690         category = action_frame->data[DOT11_ACTION_CAT_OFF];
1691         action = action_frame->data[DOT11_ACTION_ACT_OFF];
1692
1693         /* initialize variables */
1694         p2p->next_af_subtype = P2P_PAF_SUBTYPE_INVALID;
1695         p2p->gon_req_action = false;
1696
1697         /* config parameters */
1698         config_af_params.mpc_onoff = -1;
1699         config_af_params.search_channel = false;
1700         config_af_params.extra_listen = false;
1701
1702         if (brcmf_p2p_is_pub_action(action_frame->data, action_frame_len)) {
1703                 /* p2p public action frame process */
1704                 if (brcmf_p2p_pub_af_tx(cfg, af_params, &config_af_params)) {
1705                         /* Just send unknown subtype frame with */
1706                         /* default parameters.                  */
1707                         brcmf_err("P2P Public action frame, unknown subtype.\n");
1708                 }
1709         } else if (brcmf_p2p_is_gas_action(action_frame->data,
1710                                            action_frame_len)) {
1711                 /* service discovery process */
1712                 if (action == P2PSD_ACTION_ID_GAS_IREQ ||
1713                     action == P2PSD_ACTION_ID_GAS_CREQ) {
1714                         /* configure service discovery query frame */
1715                         config_af_params.search_channel = true;
1716
1717                         /* save next af suptype to cancel */
1718                         /* remaining dwell time           */
1719                         p2p->next_af_subtype = action + 1;
1720
1721                         af_params->dwell_time =
1722                                 cpu_to_le32(P2P_AF_MED_DWELL_TIME);
1723                 } else if (action == P2PSD_ACTION_ID_GAS_IRESP ||
1724                            action == P2PSD_ACTION_ID_GAS_CRESP) {
1725                         /* configure service discovery response frame */
1726                         af_params->dwell_time =
1727                                 cpu_to_le32(P2P_AF_MIN_DWELL_TIME);
1728                 } else {
1729                         brcmf_err("Unknown action type: %d\n", action);
1730                         goto exit;
1731                 }
1732         } else if (brcmf_p2p_is_p2p_action(action_frame->data,
1733                                            action_frame_len)) {
1734                 /* do not configure anything. it will be */
1735                 /* sent with a default configuration     */
1736         } else {
1737                 brcmf_err("Unknown Frame: category 0x%x, action 0x%x\n",
1738                           category, action);
1739                 return false;
1740         }
1741
1742         /* if connecting on primary iface, sleep for a while before sending
1743          * af tx for VSDB
1744          */
1745         if (test_bit(BRCMF_VIF_STATUS_CONNECTING,
1746                      &p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->sme_state))
1747                 msleep(50);
1748
1749         /* if scan is ongoing, abort current scan. */
1750         if (test_bit(BRCMF_SCAN_STATUS_BUSY, &cfg->scan_status))
1751                 brcmf_abort_scanning(cfg);
1752
1753         memcpy(afx_hdl->tx_dst_addr, action_frame->da, ETH_ALEN);
1754
1755         /* To make sure to send successfully action frame, turn off mpc */
1756         if (config_af_params.mpc_onoff == 0)
1757                 brcmf_set_mpc(ifp, 0);
1758
1759         /* set status and destination address before sending af */
1760         if (p2p->next_af_subtype != P2P_PAF_SUBTYPE_INVALID) {
1761                 /* set status to cancel the remained dwell time in rx process */
1762                 set_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status);
1763         }
1764
1765         p2p->af_sent_channel = 0;
1766         set_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status);
1767         /* validate channel and p2p ies */
1768         if (config_af_params.search_channel &&
1769             IS_P2P_SOCIAL_CHANNEL(le32_to_cpu(af_params->channel)) &&
1770             p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif->saved_ie.probe_req_ie_len) {
1771                 afx_hdl = &p2p->afx_hdl;
1772                 afx_hdl->peer_listen_chan = le32_to_cpu(af_params->channel);
1773
1774                 if (brcmf_p2p_af_searching_channel(p2p) ==
1775                                                         P2P_INVALID_CHANNEL) {
1776                         brcmf_err("Couldn't find peer's channel.\n");
1777                         goto exit;
1778                 }
1779
1780                 /* Abort scan even for VSDB scenarios. Scan gets aborted in
1781                  * firmware but after the check of piggyback algorithm. To take
1782                  * care of current piggback algo, lets abort the scan here
1783                  * itself.
1784                  */
1785                 brcmf_notify_escan_complete(cfg, ifp, true, true);
1786
1787                 /* update channel */
1788                 af_params->channel = cpu_to_le32(afx_hdl->peer_chan);
1789         }
1790
1791         tx_retry = 0;
1792         while (!p2p->block_gon_req_tx &&
1793                (ack == false) && (tx_retry < P2P_AF_TX_MAX_RETRY)) {
1794                 ack = !brcmf_p2p_tx_action_frame(p2p, af_params);
1795                 tx_retry++;
1796         }
1797         if (ack == false) {
1798                 brcmf_err("Failed to send Action Frame(retry %d)\n", tx_retry);
1799                 clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status);
1800         }
1801
1802 exit:
1803         clear_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status);
1804
1805         /* WAR: sometimes dongle does not keep the dwell time of 'actframe'.
1806          * if we coundn't get the next action response frame and dongle does
1807          * not keep the dwell time, go to listen state again to get next action
1808          * response frame.
1809          */
1810         if (ack && config_af_params.extra_listen && !p2p->block_gon_req_tx &&
1811             test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status) &&
1812             p2p->af_sent_channel == afx_hdl->my_listen_chan) {
1813                 delta_ms = jiffies_to_msecs(jiffies - p2p->af_tx_sent_jiffies);
1814                 if (le32_to_cpu(af_params->dwell_time) > delta_ms)
1815                         extra_listen_time = le32_to_cpu(af_params->dwell_time) -
1816                                             delta_ms;
1817                 else
1818                         extra_listen_time = 0;
1819                 if (extra_listen_time > 50) {
1820                         set_bit(BRCMF_P2P_STATUS_WAITING_NEXT_AF_LISTEN,
1821                                 &p2p->status);
1822                         brcmf_dbg(INFO, "Wait more time! actual af time:%d, calculated extra listen:%d\n",
1823                                   le32_to_cpu(af_params->dwell_time),
1824                                   extra_listen_time);
1825                         extra_listen_time += 100;
1826                         if (!brcmf_p2p_discover_listen(p2p,
1827                                                        p2p->af_sent_channel,
1828                                                        extra_listen_time)) {
1829                                 unsigned long duration;
1830
1831                                 extra_listen_time += 100;
1832                                 duration = msecs_to_jiffies(extra_listen_time);
1833                                 wait_for_completion_timeout(&p2p->wait_next_af,
1834                                                             duration);
1835                         }
1836                         clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_AF_LISTEN,
1837                                   &p2p->status);
1838                 }
1839         }
1840
1841         if (p2p->block_gon_req_tx) {
1842                 /* if ack is true, supplicant will wait more time(100ms).
1843                  * so we will return it as a success to get more time .
1844                  */
1845                 p2p->block_gon_req_tx = false;
1846                 ack = true;
1847         }
1848
1849         clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status);
1850         /* if all done, turn mpc on again */
1851         if (config_af_params.mpc_onoff == 1)
1852                 brcmf_set_mpc(ifp, 1);
1853
1854         return ack;
1855 }
1856
1857 /**
1858  * brcmf_p2p_notify_rx_mgmt_p2p_probereq() - Event handler for p2p probe req.
1859  *
1860  * @ifp: interface pointer for which event was received.
1861  * @e: even message.
1862  * @data: payload of event message (probe request).
1863  */
1864 s32 brcmf_p2p_notify_rx_mgmt_p2p_probereq(struct brcmf_if *ifp,
1865                                           const struct brcmf_event_msg *e,
1866                                           void *data)
1867 {
1868         struct brcmf_cfg80211_info *cfg = ifp->drvr->config;
1869         struct brcmf_p2p_info *p2p = &cfg->p2p;
1870         struct afx_hdl *afx_hdl = &p2p->afx_hdl;
1871         struct brcmf_cfg80211_vif *vif = ifp->vif;
1872         struct brcmf_rx_mgmt_data *rxframe = (struct brcmf_rx_mgmt_data *)data;
1873         u16 chanspec = be16_to_cpu(rxframe->chanspec);
1874         struct brcmu_chan ch;
1875         u8 *mgmt_frame;
1876         u32 mgmt_frame_len;
1877         s32 freq;
1878         u16 mgmt_type;
1879
1880         brcmf_dbg(INFO, "Enter: event %d reason %d\n", e->event_code,
1881                   e->reason);
1882
1883         if (e->datalen < sizeof(*rxframe)) {
1884                 brcmf_dbg(SCAN, "Event data to small. Ignore\n");
1885                 return 0;
1886         }
1887
1888         ch.chspec = be16_to_cpu(rxframe->chanspec);
1889         cfg->d11inf.decchspec(&ch);
1890
1891         if (test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status) &&
1892             (ether_addr_equal(afx_hdl->tx_dst_addr, e->addr))) {
1893                 afx_hdl->peer_chan = ch.chnum;
1894                 brcmf_dbg(INFO, "PROBE REQUEST: Peer found, channel=%d\n",
1895                           afx_hdl->peer_chan);
1896                 complete(&afx_hdl->act_frm_scan);
1897         }
1898
1899         /* Firmware sends us two proberesponses for each idx one. At the */
1900         /* moment anything but bsscfgidx 0 is passed up to supplicant    */
1901         if (e->bsscfgidx == 0)
1902                 return 0;
1903
1904         /* Filter any P2P probe reqs arriving during the GO-NEG Phase */
1905         if (test_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status)) {
1906                 brcmf_dbg(INFO, "Filtering P2P probe_req in GO-NEG phase\n");
1907                 return 0;
1908         }
1909
1910         /* Check if wpa_supplicant has registered for this frame */
1911         brcmf_dbg(INFO, "vif->mgmt_rx_reg %04x\n", vif->mgmt_rx_reg);
1912         mgmt_type = (IEEE80211_STYPE_PROBE_REQ & IEEE80211_FCTL_STYPE) >> 4;
1913         if ((vif->mgmt_rx_reg & BIT(mgmt_type)) == 0)
1914                 return 0;
1915
1916         mgmt_frame = (u8 *)(rxframe + 1);
1917         mgmt_frame_len = e->datalen - sizeof(*rxframe);
1918         freq = ieee80211_channel_to_frequency(ch.chnum,
1919                                               ch.band == BRCMU_CHAN_BAND_2G ?
1920                                               IEEE80211_BAND_2GHZ :
1921                                               IEEE80211_BAND_5GHZ);
1922
1923         cfg80211_rx_mgmt(&vif->wdev, freq, 0, mgmt_frame, mgmt_frame_len, 0);
1924
1925         brcmf_dbg(INFO, "mgmt_frame_len (%d) , e->datalen (%d), chanspec (%04x), freq (%d)\n",
1926                   mgmt_frame_len, e->datalen, chanspec, freq);
1927
1928         return 0;
1929 }
1930
1931
1932 /**
1933  * brcmf_p2p_get_current_chanspec() - Get current operation channel.
1934  *
1935  * @p2p: P2P specific data.
1936  * @chanspec: chanspec to be returned.
1937  */
1938 static void brcmf_p2p_get_current_chanspec(struct brcmf_p2p_info *p2p,
1939                                            u16 *chanspec)
1940 {
1941         struct brcmf_if *ifp;
1942         u8 mac_addr[ETH_ALEN];
1943         struct brcmu_chan ch;
1944         struct brcmf_bss_info_le *bi;
1945         u8 *buf;
1946
1947         ifp = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->ifp;
1948
1949         if (brcmf_fil_cmd_data_get(ifp, BRCMF_C_GET_BSSID, mac_addr,
1950                                    ETH_ALEN) == 0) {
1951                 buf = kzalloc(WL_BSS_INFO_MAX, GFP_KERNEL);
1952                 if (buf != NULL) {
1953                         *(__le32 *)buf = cpu_to_le32(WL_BSS_INFO_MAX);
1954                         if (brcmf_fil_cmd_data_get(ifp, BRCMF_C_GET_BSS_INFO,
1955                                                    buf, WL_BSS_INFO_MAX) == 0) {
1956                                 bi = (struct brcmf_bss_info_le *)(buf + 4);
1957                                 *chanspec = le16_to_cpu(bi->chanspec);
1958                                 kfree(buf);
1959                                 return;
1960                         }
1961                         kfree(buf);
1962                 }
1963         }
1964         /* Use default channel for P2P */
1965         ch.chnum = BRCMF_P2P_TEMP_CHAN;
1966         ch.bw = BRCMU_CHAN_BW_20;
1967         p2p->cfg->d11inf.encchspec(&ch);
1968         *chanspec = ch.chspec;
1969 }
1970
1971 /**
1972  * Change a P2P Role.
1973  * Parameters:
1974  * @mac: MAC address of the BSS to change a role
1975  * Returns 0 if success.
1976  */
1977 int brcmf_p2p_ifchange(struct brcmf_cfg80211_info *cfg,
1978                        enum brcmf_fil_p2p_if_types if_type)
1979 {
1980         struct brcmf_p2p_info *p2p = &cfg->p2p;
1981         struct brcmf_cfg80211_vif *vif;
1982         struct brcmf_fil_p2p_if_le if_request;
1983         s32 err;
1984         u16 chanspec;
1985
1986         brcmf_dbg(TRACE, "Enter\n");
1987
1988         vif = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif;
1989         if (!vif) {
1990                 brcmf_err("vif for P2PAPI_BSSCFG_PRIMARY does not exist\n");
1991                 return -EPERM;
1992         }
1993         brcmf_notify_escan_complete(cfg, vif->ifp, true, true);
1994         vif = p2p->bss_idx[P2PAPI_BSSCFG_CONNECTION].vif;
1995         if (!vif) {
1996                 brcmf_err("vif for P2PAPI_BSSCFG_CONNECTION does not exist\n");
1997                 return -EPERM;
1998         }
1999         brcmf_set_mpc(vif->ifp, 0);
2000
2001         /* In concurrency case, STA may be already associated in a particular */
2002         /* channel. so retrieve the current channel of primary interface and  */
2003         /* then start the virtual interface on that.                          */
2004         brcmf_p2p_get_current_chanspec(p2p, &chanspec);
2005
2006         if_request.type = cpu_to_le16((u16)if_type);
2007         if_request.chspec = cpu_to_le16(chanspec);
2008         memcpy(if_request.addr, p2p->int_addr, sizeof(if_request.addr));
2009
2010         brcmf_cfg80211_arm_vif_event(cfg, vif);
2011         err = brcmf_fil_iovar_data_set(vif->ifp, "p2p_ifupd", &if_request,
2012                                        sizeof(if_request));
2013         if (err) {
2014                 brcmf_err("p2p_ifupd FAILED, err=%d\n", err);
2015                 brcmf_cfg80211_arm_vif_event(cfg, NULL);
2016                 return err;
2017         }
2018         err = brcmf_cfg80211_wait_vif_event_timeout(cfg, BRCMF_E_IF_CHANGE,
2019                                                     msecs_to_jiffies(1500));
2020         brcmf_cfg80211_arm_vif_event(cfg, NULL);
2021         if (!err)  {
2022                 brcmf_err("No BRCMF_E_IF_CHANGE event received\n");
2023                 return -EIO;
2024         }
2025
2026         err = brcmf_fil_cmd_int_set(vif->ifp, BRCMF_C_SET_SCB_TIMEOUT,
2027                                     BRCMF_SCB_TIMEOUT_VALUE);
2028
2029         return err;
2030 }
2031
2032 static int brcmf_p2p_request_p2p_if(struct brcmf_p2p_info *p2p,
2033                                     struct brcmf_if *ifp, u8 ea[ETH_ALEN],
2034                                     enum brcmf_fil_p2p_if_types iftype)
2035 {
2036         struct brcmf_fil_p2p_if_le if_request;
2037         int err;
2038         u16 chanspec;
2039
2040         /* we need a default channel */
2041         brcmf_p2p_get_current_chanspec(p2p, &chanspec);
2042
2043         /* fill the firmware request */
2044         memcpy(if_request.addr, ea, ETH_ALEN);
2045         if_request.type = cpu_to_le16((u16)iftype);
2046         if_request.chspec = cpu_to_le16(chanspec);
2047
2048         err = brcmf_fil_iovar_data_set(ifp, "p2p_ifadd", &if_request,
2049                                        sizeof(if_request));
2050         if (err)
2051                 return err;
2052
2053         return err;
2054 }
2055
2056 static int brcmf_p2p_disable_p2p_if(struct brcmf_cfg80211_vif *vif)
2057 {
2058         struct brcmf_cfg80211_info *cfg = wdev_to_cfg(&vif->wdev);
2059         struct net_device *pri_ndev = cfg_to_ndev(cfg);
2060         struct brcmf_if *ifp = netdev_priv(pri_ndev);
2061         u8 *addr = vif->wdev.netdev->dev_addr;
2062
2063         return brcmf_fil_iovar_data_set(ifp, "p2p_ifdis", addr, ETH_ALEN);
2064 }
2065
2066 static int brcmf_p2p_release_p2p_if(struct brcmf_cfg80211_vif *vif)
2067 {
2068         struct brcmf_cfg80211_info *cfg = wdev_to_cfg(&vif->wdev);
2069         struct net_device *pri_ndev = cfg_to_ndev(cfg);
2070         struct brcmf_if *ifp = netdev_priv(pri_ndev);
2071         u8 *addr = vif->wdev.netdev->dev_addr;
2072
2073         return brcmf_fil_iovar_data_set(ifp, "p2p_ifdel", addr, ETH_ALEN);
2074 }
2075
2076 /**
2077  * brcmf_p2p_create_p2pdev() - create a P2P_DEVICE virtual interface.
2078  *
2079  * @p2p: P2P specific data.
2080  * @wiphy: wiphy device of new interface.
2081  * @addr: mac address for this new interface.
2082  */
2083 static struct wireless_dev *brcmf_p2p_create_p2pdev(struct brcmf_p2p_info *p2p,
2084                                                     struct wiphy *wiphy,
2085                                                     u8 *addr)
2086 {
2087         struct brcmf_cfg80211_vif *p2p_vif;
2088         struct brcmf_if *p2p_ifp;
2089         struct brcmf_if *pri_ifp;
2090         int err;
2091         u32 bssidx;
2092
2093         if (p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif)
2094                 return ERR_PTR(-ENOSPC);
2095
2096         p2p_vif = brcmf_alloc_vif(p2p->cfg, NL80211_IFTYPE_P2P_DEVICE,
2097                                   false);
2098         if (IS_ERR(p2p_vif)) {
2099                 brcmf_err("could not create discovery vif\n");
2100                 return (struct wireless_dev *)p2p_vif;
2101         }
2102
2103         pri_ifp = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->ifp;
2104         brcmf_p2p_generate_bss_mac(p2p, addr);
2105         brcmf_p2p_set_firmware(pri_ifp, p2p->dev_addr);
2106
2107         brcmf_cfg80211_arm_vif_event(p2p->cfg, p2p_vif);
2108         brcmf_fweh_p2pdev_setup(pri_ifp, true);
2109
2110         /* Initialize P2P Discovery in the firmware */
2111         err = brcmf_fil_iovar_int_set(pri_ifp, "p2p_disc", 1);
2112         if (err < 0) {
2113                 brcmf_err("set p2p_disc error\n");
2114                 brcmf_fweh_p2pdev_setup(pri_ifp, false);
2115                 brcmf_cfg80211_arm_vif_event(p2p->cfg, NULL);
2116                 goto fail;
2117         }
2118
2119         /* wait for firmware event */
2120         err = brcmf_cfg80211_wait_vif_event_timeout(p2p->cfg, BRCMF_E_IF_ADD,
2121                                                     msecs_to_jiffies(1500));
2122         brcmf_cfg80211_arm_vif_event(p2p->cfg, NULL);
2123         brcmf_fweh_p2pdev_setup(pri_ifp, false);
2124         if (!err) {
2125                 brcmf_err("timeout occurred\n");
2126                 err = -EIO;
2127                 goto fail;
2128         }
2129
2130         /* discovery interface created */
2131         p2p_ifp = p2p_vif->ifp;
2132         p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif = p2p_vif;
2133         memcpy(p2p_ifp->mac_addr, p2p->dev_addr, ETH_ALEN);
2134         memcpy(&p2p_vif->wdev.address, p2p->dev_addr, sizeof(p2p->dev_addr));
2135
2136         /* verify bsscfg index for P2P discovery */
2137         err = brcmf_fil_iovar_int_get(pri_ifp, "p2p_dev", &bssidx);
2138         if (err < 0) {
2139                 brcmf_err("retrieving discover bsscfg index failed\n");
2140                 goto fail;
2141         }
2142
2143         WARN_ON(p2p_ifp->bssidx != bssidx);
2144
2145         init_completion(&p2p->send_af_done);
2146         INIT_WORK(&p2p->afx_hdl.afx_work, brcmf_p2p_afx_handler);
2147         init_completion(&p2p->afx_hdl.act_frm_scan);
2148         init_completion(&p2p->wait_next_af);
2149
2150         return &p2p_vif->wdev;
2151
2152 fail:
2153         brcmf_free_vif(p2p_vif);
2154         return ERR_PTR(err);
2155 }
2156
2157 /**
2158  * brcmf_p2p_add_vif() - create a new P2P virtual interface.
2159  *
2160  * @wiphy: wiphy device of new interface.
2161  * @name: name of the new interface.
2162  * @name_assign_type: origin of the interface name
2163  * @type: nl80211 interface type.
2164  * @flags: not used.
2165  * @params: contains mac address for P2P device.
2166  */
2167 struct wireless_dev *brcmf_p2p_add_vif(struct wiphy *wiphy, const char *name,
2168                                        unsigned char name_assign_type,
2169                                        enum nl80211_iftype type, u32 *flags,
2170                                        struct vif_params *params)
2171 {
2172         struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
2173         struct brcmf_if *ifp = netdev_priv(cfg_to_ndev(cfg));
2174         struct brcmf_cfg80211_vif *vif;
2175         enum brcmf_fil_p2p_if_types iftype;
2176         int err;
2177
2178         if (brcmf_cfg80211_vif_event_armed(cfg))
2179                 return ERR_PTR(-EBUSY);
2180
2181         brcmf_dbg(INFO, "adding vif \"%s\" (type=%d)\n", name, type);
2182
2183         switch (type) {
2184         case NL80211_IFTYPE_P2P_CLIENT:
2185                 iftype = BRCMF_FIL_P2P_IF_CLIENT;
2186                 break;
2187         case NL80211_IFTYPE_P2P_GO:
2188                 iftype = BRCMF_FIL_P2P_IF_GO;
2189                 break;
2190         case NL80211_IFTYPE_P2P_DEVICE:
2191                 return brcmf_p2p_create_p2pdev(&cfg->p2p, wiphy,
2192                                                params->macaddr);
2193         default:
2194                 return ERR_PTR(-EOPNOTSUPP);
2195         }
2196
2197         vif = brcmf_alloc_vif(cfg, type, false);
2198         if (IS_ERR(vif))
2199                 return (struct wireless_dev *)vif;
2200         brcmf_cfg80211_arm_vif_event(cfg, vif);
2201
2202         err = brcmf_p2p_request_p2p_if(&cfg->p2p, ifp, cfg->p2p.int_addr,
2203                                        iftype);
2204         if (err) {
2205                 brcmf_cfg80211_arm_vif_event(cfg, NULL);
2206                 goto fail;
2207         }
2208
2209         /* wait for firmware event */
2210         err = brcmf_cfg80211_wait_vif_event_timeout(cfg, BRCMF_E_IF_ADD,
2211                                                     msecs_to_jiffies(1500));
2212         brcmf_cfg80211_arm_vif_event(cfg, NULL);
2213         if (!err) {
2214                 brcmf_err("timeout occurred\n");
2215                 err = -EIO;
2216                 goto fail;
2217         }
2218
2219         /* interface created in firmware */
2220         ifp = vif->ifp;
2221         if (!ifp) {
2222                 brcmf_err("no if pointer provided\n");
2223                 err = -ENOENT;
2224                 goto fail;
2225         }
2226
2227         strncpy(ifp->ndev->name, name, sizeof(ifp->ndev->name) - 1);
2228         ifp->ndev->name_assign_type = name_assign_type;
2229         err = brcmf_net_attach(ifp, true);
2230         if (err) {
2231                 brcmf_err("Registering netdevice failed\n");
2232                 goto fail;
2233         }
2234
2235         cfg->p2p.bss_idx[P2PAPI_BSSCFG_CONNECTION].vif = vif;
2236         /* Disable firmware roaming for P2P interface  */
2237         brcmf_fil_iovar_int_set(ifp, "roam_off", 1);
2238         if (iftype == BRCMF_FIL_P2P_IF_GO) {
2239                 /* set station timeout for p2p */
2240                 brcmf_fil_cmd_int_set(ifp, BRCMF_C_SET_SCB_TIMEOUT,
2241                                       BRCMF_SCB_TIMEOUT_VALUE);
2242         }
2243         return &ifp->vif->wdev;
2244
2245 fail:
2246         brcmf_free_vif(vif);
2247         return ERR_PTR(err);
2248 }
2249
2250 /**
2251  * brcmf_p2p_del_vif() - delete a P2P virtual interface.
2252  *
2253  * @wiphy: wiphy device of interface.
2254  * @wdev: wireless device of interface.
2255  */
2256 int brcmf_p2p_del_vif(struct wiphy *wiphy, struct wireless_dev *wdev)
2257 {
2258         struct brcmf_cfg80211_info *cfg = wiphy_priv(wiphy);
2259         struct brcmf_p2p_info *p2p = &cfg->p2p;
2260         struct brcmf_cfg80211_vif *vif;
2261         unsigned long jiffie_timeout = msecs_to_jiffies(1500);
2262         bool wait_for_disable = false;
2263         int err;
2264
2265         brcmf_dbg(TRACE, "delete P2P vif\n");
2266         vif = container_of(wdev, struct brcmf_cfg80211_vif, wdev);
2267
2268         brcmf_cfg80211_arm_vif_event(cfg, vif);
2269         switch (vif->wdev.iftype) {
2270         case NL80211_IFTYPE_P2P_CLIENT:
2271                 if (test_bit(BRCMF_VIF_STATUS_DISCONNECTING, &vif->sme_state))
2272                         wait_for_disable = true;
2273                 break;
2274
2275         case NL80211_IFTYPE_P2P_GO:
2276                 if (!brcmf_p2p_disable_p2p_if(vif))
2277                         wait_for_disable = true;
2278                 break;
2279
2280         case NL80211_IFTYPE_P2P_DEVICE:
2281                 if (!p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif)
2282                         return 0;
2283                 brcmf_p2p_cancel_remain_on_channel(vif->ifp);
2284                 brcmf_p2p_deinit_discovery(p2p);
2285         default:
2286                 return -ENOTSUPP;
2287         }
2288
2289         clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status);
2290         brcmf_dbg(INFO, "P2P: GO_NEG_PHASE status cleared\n");
2291
2292         if (wait_for_disable)
2293                 wait_for_completion_timeout(&cfg->vif_disabled,
2294                                             msecs_to_jiffies(500));
2295
2296         err = 0;
2297         if (vif->wdev.iftype != NL80211_IFTYPE_P2P_DEVICE) {
2298                 brcmf_vif_clear_mgmt_ies(vif);
2299                 err = brcmf_p2p_release_p2p_if(vif);
2300         }
2301         if (!err) {
2302                 /* wait for firmware event */
2303                 err = brcmf_cfg80211_wait_vif_event_timeout(cfg, BRCMF_E_IF_DEL,
2304                                                             jiffie_timeout);
2305                 if (!err)
2306                         err = -EIO;
2307                 else
2308                         err = 0;
2309         }
2310         if (err)
2311                 brcmf_remove_interface(vif->ifp);
2312
2313         brcmf_cfg80211_arm_vif_event(cfg, NULL);
2314         if (vif->wdev.iftype != NL80211_IFTYPE_P2P_DEVICE)
2315                 p2p->bss_idx[P2PAPI_BSSCFG_CONNECTION].vif = NULL;
2316
2317         return err;
2318 }
2319
2320 void brcmf_p2p_ifp_removed(struct brcmf_if *ifp)
2321 {
2322         struct brcmf_cfg80211_info *cfg;
2323         struct brcmf_cfg80211_vif *vif;
2324
2325         brcmf_dbg(INFO, "P2P: device interface removed\n");
2326         vif = ifp->vif;
2327         cfg = wdev_to_cfg(&vif->wdev);
2328         cfg->p2p.bss_idx[P2PAPI_BSSCFG_DEVICE].vif = NULL;
2329         rtnl_lock();
2330         cfg80211_unregister_wdev(&vif->wdev);
2331         rtnl_unlock();
2332         brcmf_free_vif(vif);
2333 }
2334
2335 int brcmf_p2p_start_device(struct wiphy *wiphy, struct wireless_dev *wdev)
2336 {
2337         struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
2338         struct brcmf_p2p_info *p2p = &cfg->p2p;
2339         struct brcmf_cfg80211_vif *vif;
2340         int err;
2341
2342         vif = container_of(wdev, struct brcmf_cfg80211_vif, wdev);
2343         mutex_lock(&cfg->usr_sync);
2344         err = brcmf_p2p_enable_discovery(p2p);
2345         if (!err)
2346                 set_bit(BRCMF_VIF_STATUS_READY, &vif->sme_state);
2347         mutex_unlock(&cfg->usr_sync);
2348         return err;
2349 }
2350
2351 void brcmf_p2p_stop_device(struct wiphy *wiphy, struct wireless_dev *wdev)
2352 {
2353         struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
2354         struct brcmf_p2p_info *p2p = &cfg->p2p;
2355         struct brcmf_cfg80211_vif *vif;
2356
2357         vif = container_of(wdev, struct brcmf_cfg80211_vif, wdev);
2358         /* This call can be result of the unregister_wdev call. In that case
2359          * we dont want to do anything anymore. Just return. The config vif
2360          * will have been cleared at this point.
2361          */
2362         if (p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif == vif) {
2363                 mutex_lock(&cfg->usr_sync);
2364                 /* Set the discovery state to SCAN */
2365                 (void)brcmf_p2p_set_discover_state(vif->ifp,
2366                                                    WL_P2P_DISC_ST_SCAN, 0, 0);
2367                 brcmf_abort_scanning(cfg);
2368                 clear_bit(BRCMF_VIF_STATUS_READY, &vif->sme_state);
2369                 mutex_unlock(&cfg->usr_sync);
2370         }
2371 }
2372
2373 /**
2374  * brcmf_p2p_attach() - attach for P2P.
2375  *
2376  * @cfg: driver private data for cfg80211 interface.
2377  * @p2pdev_forced: create p2p device interface at attach.
2378  */
2379 s32 brcmf_p2p_attach(struct brcmf_cfg80211_info *cfg, bool p2pdev_forced)
2380 {
2381         struct brcmf_p2p_info *p2p;
2382         struct brcmf_if *pri_ifp;
2383         s32 err = 0;
2384         void *err_ptr;
2385
2386         p2p = &cfg->p2p;
2387         p2p->cfg = cfg;
2388
2389         pri_ifp = brcmf_get_ifp(cfg->pub, 0);
2390         p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif = pri_ifp->vif;
2391
2392         if (p2pdev_forced) {
2393                 err_ptr = brcmf_p2p_create_p2pdev(p2p, NULL, NULL);
2394                 if (IS_ERR(err_ptr)) {
2395                         brcmf_err("P2P device creation failed.\n");
2396                         err = PTR_ERR(err_ptr);
2397                 }
2398         } else {
2399                 p2p->p2pdev_dynamically = true;
2400         }
2401         return err;
2402 }
2403
2404 /**
2405  * brcmf_p2p_detach() - detach P2P.
2406  *
2407  * @p2p: P2P specific data.
2408  */
2409 void brcmf_p2p_detach(struct brcmf_p2p_info *p2p)
2410 {
2411         struct brcmf_cfg80211_vif *vif;
2412
2413         vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif;
2414         if (vif != NULL) {
2415                 brcmf_p2p_cancel_remain_on_channel(vif->ifp);
2416                 brcmf_p2p_deinit_discovery(p2p);
2417                 brcmf_remove_interface(vif->ifp);
2418         }
2419         /* just set it all to zero */
2420         memset(p2p, 0, sizeof(*p2p));
2421 }
2422