1 /* 2 * Copyright (c) 2012 Broadcom Corporation 3 * 4 * Permission to use, copy, modify, and/or distribute this software for any 5 * purpose with or without fee is hereby granted, provided that the above 6 * copyright notice and this permission notice appear in all copies. 7 * 8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY 11 * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION 13 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN 14 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 15 */ 16 #include <linux/slab.h> 17 #include <linux/netdevice.h> 18 #include <linux/etherdevice.h> 19 #include <linux/rtnetlink.h> 20 #include <net/cfg80211.h> 21 22 #include <brcmu_wifi.h> 23 #include <brcmu_utils.h> 24 #include <defs.h> 25 #include "core.h" 26 #include "debug.h" 27 #include "fwil.h" 28 #include "fwil_types.h" 29 #include "p2p.h" 30 #include "cfg80211.h" 31 32 /* parameters used for p2p escan */ 33 #define P2PAPI_SCAN_NPROBES 1 34 #define P2PAPI_SCAN_DWELL_TIME_MS 80 35 #define P2PAPI_SCAN_SOCIAL_DWELL_TIME_MS 40 36 #define P2PAPI_SCAN_HOME_TIME_MS 60 37 #define P2PAPI_SCAN_NPROBS_TIME_MS 30 38 #define P2PAPI_SCAN_AF_SEARCH_DWELL_TIME_MS 100 39 #define WL_SCAN_CONNECT_DWELL_TIME_MS 200 40 #define WL_SCAN_JOIN_PROBE_INTERVAL_MS 20 41 42 #define BRCMF_P2P_WILDCARD_SSID "DIRECT-" 43 #define BRCMF_P2P_WILDCARD_SSID_LEN (sizeof(BRCMF_P2P_WILDCARD_SSID) - 1) 44 45 #define SOCIAL_CHAN_1 1 46 #define SOCIAL_CHAN_2 6 47 #define SOCIAL_CHAN_3 11 48 #define IS_P2P_SOCIAL_CHANNEL(channel) ((channel == SOCIAL_CHAN_1) || \ 49 (channel == SOCIAL_CHAN_2) || \ 50 (channel == SOCIAL_CHAN_3)) 51 #define BRCMF_P2P_TEMP_CHAN SOCIAL_CHAN_3 52 #define SOCIAL_CHAN_CNT 3 53 #define AF_PEER_SEARCH_CNT 2 54 55 #define BRCMF_SCB_TIMEOUT_VALUE 20 56 57 #define P2P_VER 9 /* P2P version: 9=WiFi P2P v1.0 */ 58 #define P2P_PUB_AF_CATEGORY 0x04 59 #define P2P_PUB_AF_ACTION 0x09 60 #define P2P_AF_CATEGORY 0x7f 61 #define P2P_OUI "\x50\x6F\x9A" /* P2P OUI */ 62 #define P2P_OUI_LEN 3 /* P2P OUI length */ 63 64 /* Action Frame Constants */ 65 #define DOT11_ACTION_HDR_LEN 2 /* action frame category + action */ 66 #define DOT11_ACTION_CAT_OFF 0 /* category offset */ 67 #define DOT11_ACTION_ACT_OFF 1 /* action offset */ 68 69 #define P2P_AF_DWELL_TIME 200 70 #define P2P_AF_MIN_DWELL_TIME 100 71 #define P2P_AF_MED_DWELL_TIME 400 72 #define P2P_AF_LONG_DWELL_TIME 1000 73 #define P2P_AF_TX_MAX_RETRY 1 74 #define P2P_AF_MAX_WAIT_TIME msecs_to_jiffies(2000) 75 #define P2P_INVALID_CHANNEL -1 76 #define P2P_CHANNEL_SYNC_RETRY 5 77 #define P2P_AF_FRM_SCAN_MAX_WAIT msecs_to_jiffies(1500) 78 #define P2P_DEFAULT_SLEEP_TIME_VSDB 200 79 80 /* WiFi P2P Public Action Frame OUI Subtypes */ 81 #define P2P_PAF_GON_REQ 0 /* Group Owner Negotiation Req */ 82 #define P2P_PAF_GON_RSP 1 /* Group Owner Negotiation Rsp */ 83 #define P2P_PAF_GON_CONF 2 /* Group Owner Negotiation Confirm */ 84 #define P2P_PAF_INVITE_REQ 3 /* P2P Invitation Request */ 85 #define P2P_PAF_INVITE_RSP 4 /* P2P Invitation Response */ 86 #define P2P_PAF_DEVDIS_REQ 5 /* Device Discoverability Request */ 87 #define P2P_PAF_DEVDIS_RSP 6 /* Device Discoverability Response */ 88 #define P2P_PAF_PROVDIS_REQ 7 /* Provision Discovery Request */ 89 #define P2P_PAF_PROVDIS_RSP 8 /* Provision Discovery Response */ 90 #define P2P_PAF_SUBTYPE_INVALID 255 /* Invalid Subtype */ 91 92 /* WiFi P2P Action Frame OUI Subtypes */ 93 #define P2P_AF_NOTICE_OF_ABSENCE 0 /* Notice of Absence */ 94 #define P2P_AF_PRESENCE_REQ 1 /* P2P Presence Request */ 95 #define P2P_AF_PRESENCE_RSP 2 /* P2P Presence Response */ 96 #define P2P_AF_GO_DISC_REQ 3 /* GO Discoverability Request */ 97 98 /* P2P Service Discovery related */ 99 #define P2PSD_ACTION_CATEGORY 0x04 /* Public action frame */ 100 #define P2PSD_ACTION_ID_GAS_IREQ 0x0a /* GAS Initial Request AF */ 101 #define P2PSD_ACTION_ID_GAS_IRESP 0x0b /* GAS Initial Response AF */ 102 #define P2PSD_ACTION_ID_GAS_CREQ 0x0c /* GAS Comback Request AF */ 103 #define P2PSD_ACTION_ID_GAS_CRESP 0x0d /* GAS Comback Response AF */ 104 105 #define BRCMF_P2P_DISABLE_TIMEOUT msecs_to_jiffies(500) 106 /** 107 * struct brcmf_p2p_disc_st_le - set discovery state in firmware. 108 * 109 * @state: requested discovery state (see enum brcmf_p2p_disc_state). 110 * @chspec: channel parameter for %WL_P2P_DISC_ST_LISTEN state. 111 * @dwell: dwell time in ms for %WL_P2P_DISC_ST_LISTEN state. 112 */ 113 struct brcmf_p2p_disc_st_le { 114 u8 state; 115 __le16 chspec; 116 __le16 dwell; 117 }; 118 119 /** 120 * enum brcmf_p2p_disc_state - P2P discovery state values 121 * 122 * @WL_P2P_DISC_ST_SCAN: P2P discovery with wildcard SSID and P2P IE. 123 * @WL_P2P_DISC_ST_LISTEN: P2P discovery off-channel for specified time. 124 * @WL_P2P_DISC_ST_SEARCH: P2P discovery with P2P wildcard SSID and P2P IE. 125 */ 126 enum brcmf_p2p_disc_state { 127 WL_P2P_DISC_ST_SCAN, 128 WL_P2P_DISC_ST_LISTEN, 129 WL_P2P_DISC_ST_SEARCH 130 }; 131 132 /** 133 * struct brcmf_p2p_scan_le - P2P specific scan request. 134 * 135 * @type: type of scan method requested (values: 'E' or 'S'). 136 * @reserved: reserved (ignored). 137 * @eparams: parameters used for type 'E'. 138 * @sparams: parameters used for type 'S'. 139 */ 140 struct brcmf_p2p_scan_le { 141 u8 type; 142 u8 reserved[3]; 143 union { 144 struct brcmf_escan_params_le eparams; 145 struct brcmf_scan_params_le sparams; 146 }; 147 }; 148 149 /** 150 * struct brcmf_p2p_pub_act_frame - WiFi P2P Public Action Frame 151 * 152 * @category: P2P_PUB_AF_CATEGORY 153 * @action: P2P_PUB_AF_ACTION 154 * @oui[3]: P2P_OUI 155 * @oui_type: OUI type - P2P_VER 156 * @subtype: OUI subtype - P2P_TYPE_* 157 * @dialog_token: nonzero, identifies req/rsp transaction 158 * @elts[1]: Variable length information elements. 159 */ 160 struct brcmf_p2p_pub_act_frame { 161 u8 category; 162 u8 action; 163 u8 oui[3]; 164 u8 oui_type; 165 u8 subtype; 166 u8 dialog_token; 167 u8 elts[1]; 168 }; 169 170 /** 171 * struct brcmf_p2p_action_frame - WiFi P2P Action Frame 172 * 173 * @category: P2P_AF_CATEGORY 174 * @OUI[3]: OUI - P2P_OUI 175 * @type: OUI Type - P2P_VER 176 * @subtype: OUI Subtype - P2P_AF_* 177 * @dialog_token: nonzero, identifies req/resp tranaction 178 * @elts[1]: Variable length information elements. 179 */ 180 struct brcmf_p2p_action_frame { 181 u8 category; 182 u8 oui[3]; 183 u8 type; 184 u8 subtype; 185 u8 dialog_token; 186 u8 elts[1]; 187 }; 188 189 /** 190 * struct brcmf_p2psd_gas_pub_act_frame - Wi-Fi GAS Public Action Frame 191 * 192 * @category: 0x04 Public Action Frame 193 * @action: 0x6c Advertisement Protocol 194 * @dialog_token: nonzero, identifies req/rsp transaction 195 * @query_data[1]: Query Data. SD gas ireq SD gas iresp 196 */ 197 struct brcmf_p2psd_gas_pub_act_frame { 198 u8 category; 199 u8 action; 200 u8 dialog_token; 201 u8 query_data[1]; 202 }; 203 204 /** 205 * struct brcmf_config_af_params - Action Frame Parameters for tx. 206 * 207 * @mpc_onoff: To make sure to send successfully action frame, we have to 208 * turn off mpc 0: off, 1: on, (-1): do nothing 209 * @search_channel: 1: search peer's channel to send af 210 * extra_listen: keep the dwell time to get af response frame. 211 */ 212 struct brcmf_config_af_params { 213 s32 mpc_onoff; 214 bool search_channel; 215 bool extra_listen; 216 }; 217 218 /** 219 * brcmf_p2p_is_pub_action() - true if p2p public type frame. 220 * 221 * @frame: action frame data. 222 * @frame_len: length of action frame data. 223 * 224 * Determine if action frame is p2p public action type 225 */ 226 static bool brcmf_p2p_is_pub_action(void *frame, u32 frame_len) 227 { 228 struct brcmf_p2p_pub_act_frame *pact_frm; 229 230 if (frame == NULL) 231 return false; 232 233 pact_frm = (struct brcmf_p2p_pub_act_frame *)frame; 234 if (frame_len < sizeof(struct brcmf_p2p_pub_act_frame) - 1) 235 return false; 236 237 if (pact_frm->category == P2P_PUB_AF_CATEGORY && 238 pact_frm->action == P2P_PUB_AF_ACTION && 239 pact_frm->oui_type == P2P_VER && 240 memcmp(pact_frm->oui, P2P_OUI, P2P_OUI_LEN) == 0) 241 return true; 242 243 return false; 244 } 245 246 /** 247 * brcmf_p2p_is_p2p_action() - true if p2p action type frame. 248 * 249 * @frame: action frame data. 250 * @frame_len: length of action frame data. 251 * 252 * Determine if action frame is p2p action type 253 */ 254 static bool brcmf_p2p_is_p2p_action(void *frame, u32 frame_len) 255 { 256 struct brcmf_p2p_action_frame *act_frm; 257 258 if (frame == NULL) 259 return false; 260 261 act_frm = (struct brcmf_p2p_action_frame *)frame; 262 if (frame_len < sizeof(struct brcmf_p2p_action_frame) - 1) 263 return false; 264 265 if (act_frm->category == P2P_AF_CATEGORY && 266 act_frm->type == P2P_VER && 267 memcmp(act_frm->oui, P2P_OUI, P2P_OUI_LEN) == 0) 268 return true; 269 270 return false; 271 } 272 273 /** 274 * brcmf_p2p_is_gas_action() - true if p2p gas action type frame. 275 * 276 * @frame: action frame data. 277 * @frame_len: length of action frame data. 278 * 279 * Determine if action frame is p2p gas action type 280 */ 281 static bool brcmf_p2p_is_gas_action(void *frame, u32 frame_len) 282 { 283 struct brcmf_p2psd_gas_pub_act_frame *sd_act_frm; 284 285 if (frame == NULL) 286 return false; 287 288 sd_act_frm = (struct brcmf_p2psd_gas_pub_act_frame *)frame; 289 if (frame_len < sizeof(struct brcmf_p2psd_gas_pub_act_frame) - 1) 290 return false; 291 292 if (sd_act_frm->category != P2PSD_ACTION_CATEGORY) 293 return false; 294 295 if (sd_act_frm->action == P2PSD_ACTION_ID_GAS_IREQ || 296 sd_act_frm->action == P2PSD_ACTION_ID_GAS_IRESP || 297 sd_act_frm->action == P2PSD_ACTION_ID_GAS_CREQ || 298 sd_act_frm->action == P2PSD_ACTION_ID_GAS_CRESP) 299 return true; 300 301 return false; 302 } 303 304 /** 305 * brcmf_p2p_print_actframe() - debug print routine. 306 * 307 * @tx: Received or to be transmitted 308 * @frame: action frame data. 309 * @frame_len: length of action frame data. 310 * 311 * Print information about the p2p action frame 312 */ 313 314 #ifdef DEBUG 315 316 static void brcmf_p2p_print_actframe(bool tx, void *frame, u32 frame_len) 317 { 318 struct brcmf_p2p_pub_act_frame *pact_frm; 319 struct brcmf_p2p_action_frame *act_frm; 320 struct brcmf_p2psd_gas_pub_act_frame *sd_act_frm; 321 322 if (!frame || frame_len <= 2) 323 return; 324 325 if (brcmf_p2p_is_pub_action(frame, frame_len)) { 326 pact_frm = (struct brcmf_p2p_pub_act_frame *)frame; 327 switch (pact_frm->subtype) { 328 case P2P_PAF_GON_REQ: 329 brcmf_dbg(TRACE, "%s P2P Group Owner Negotiation Req Frame\n", 330 (tx) ? "TX" : "RX"); 331 break; 332 case P2P_PAF_GON_RSP: 333 brcmf_dbg(TRACE, "%s P2P Group Owner Negotiation Rsp Frame\n", 334 (tx) ? "TX" : "RX"); 335 break; 336 case P2P_PAF_GON_CONF: 337 brcmf_dbg(TRACE, "%s P2P Group Owner Negotiation Confirm Frame\n", 338 (tx) ? "TX" : "RX"); 339 break; 340 case P2P_PAF_INVITE_REQ: 341 brcmf_dbg(TRACE, "%s P2P Invitation Request Frame\n", 342 (tx) ? "TX" : "RX"); 343 break; 344 case P2P_PAF_INVITE_RSP: 345 brcmf_dbg(TRACE, "%s P2P Invitation Response Frame\n", 346 (tx) ? "TX" : "RX"); 347 break; 348 case P2P_PAF_DEVDIS_REQ: 349 brcmf_dbg(TRACE, "%s P2P Device Discoverability Request Frame\n", 350 (tx) ? "TX" : "RX"); 351 break; 352 case P2P_PAF_DEVDIS_RSP: 353 brcmf_dbg(TRACE, "%s P2P Device Discoverability Response Frame\n", 354 (tx) ? "TX" : "RX"); 355 break; 356 case P2P_PAF_PROVDIS_REQ: 357 brcmf_dbg(TRACE, "%s P2P Provision Discovery Request Frame\n", 358 (tx) ? "TX" : "RX"); 359 break; 360 case P2P_PAF_PROVDIS_RSP: 361 brcmf_dbg(TRACE, "%s P2P Provision Discovery Response Frame\n", 362 (tx) ? "TX" : "RX"); 363 break; 364 default: 365 brcmf_dbg(TRACE, "%s Unknown P2P Public Action Frame\n", 366 (tx) ? "TX" : "RX"); 367 break; 368 } 369 } else if (brcmf_p2p_is_p2p_action(frame, frame_len)) { 370 act_frm = (struct brcmf_p2p_action_frame *)frame; 371 switch (act_frm->subtype) { 372 case P2P_AF_NOTICE_OF_ABSENCE: 373 brcmf_dbg(TRACE, "%s P2P Notice of Absence Frame\n", 374 (tx) ? "TX" : "RX"); 375 break; 376 case P2P_AF_PRESENCE_REQ: 377 brcmf_dbg(TRACE, "%s P2P Presence Request Frame\n", 378 (tx) ? "TX" : "RX"); 379 break; 380 case P2P_AF_PRESENCE_RSP: 381 brcmf_dbg(TRACE, "%s P2P Presence Response Frame\n", 382 (tx) ? "TX" : "RX"); 383 break; 384 case P2P_AF_GO_DISC_REQ: 385 brcmf_dbg(TRACE, "%s P2P Discoverability Request Frame\n", 386 (tx) ? "TX" : "RX"); 387 break; 388 default: 389 brcmf_dbg(TRACE, "%s Unknown P2P Action Frame\n", 390 (tx) ? "TX" : "RX"); 391 } 392 393 } else if (brcmf_p2p_is_gas_action(frame, frame_len)) { 394 sd_act_frm = (struct brcmf_p2psd_gas_pub_act_frame *)frame; 395 switch (sd_act_frm->action) { 396 case P2PSD_ACTION_ID_GAS_IREQ: 397 brcmf_dbg(TRACE, "%s P2P GAS Initial Request\n", 398 (tx) ? "TX" : "RX"); 399 break; 400 case P2PSD_ACTION_ID_GAS_IRESP: 401 brcmf_dbg(TRACE, "%s P2P GAS Initial Response\n", 402 (tx) ? "TX" : "RX"); 403 break; 404 case P2PSD_ACTION_ID_GAS_CREQ: 405 brcmf_dbg(TRACE, "%s P2P GAS Comback Request\n", 406 (tx) ? "TX" : "RX"); 407 break; 408 case P2PSD_ACTION_ID_GAS_CRESP: 409 brcmf_dbg(TRACE, "%s P2P GAS Comback Response\n", 410 (tx) ? "TX" : "RX"); 411 break; 412 default: 413 brcmf_dbg(TRACE, "%s Unknown P2P GAS Frame\n", 414 (tx) ? "TX" : "RX"); 415 break; 416 } 417 } 418 } 419 420 #else 421 422 static void brcmf_p2p_print_actframe(bool tx, void *frame, u32 frame_len) 423 { 424 } 425 426 #endif 427 428 429 /** 430 * brcmf_p2p_set_firmware() - prepare firmware for peer-to-peer operation. 431 * 432 * @ifp: ifp to use for iovars (primary). 433 * @p2p_mac: mac address to configure for p2p_da_override 434 */ 435 static int brcmf_p2p_set_firmware(struct brcmf_if *ifp, u8 *p2p_mac) 436 { 437 s32 ret = 0; 438 439 brcmf_fil_cmd_int_set(ifp, BRCMF_C_DOWN, 1); 440 brcmf_fil_iovar_int_set(ifp, "apsta", 1); 441 brcmf_fil_cmd_int_set(ifp, BRCMF_C_UP, 1); 442 443 /* In case of COB type, firmware has default mac address 444 * After Initializing firmware, we have to set current mac address to 445 * firmware for P2P device address. This must be done with discovery 446 * disabled. 447 */ 448 brcmf_fil_iovar_int_set(ifp, "p2p_disc", 0); 449 450 ret = brcmf_fil_iovar_data_set(ifp, "p2p_da_override", p2p_mac, 451 ETH_ALEN); 452 if (ret) 453 brcmf_err("failed to update device address ret %d\n", ret); 454 455 return ret; 456 } 457 458 /** 459 * brcmf_p2p_generate_bss_mac() - derive mac addresses for P2P. 460 * 461 * @p2p: P2P specific data. 462 * @dev_addr: optional device address. 463 * 464 * P2P needs mac addresses for P2P device and interface. If no device 465 * address it specified, these are derived from a random ethernet 466 * address. 467 */ 468 static void brcmf_p2p_generate_bss_mac(struct brcmf_p2p_info *p2p, u8 *dev_addr) 469 { 470 bool random_addr = false; 471 472 if (!dev_addr || is_zero_ether_addr(dev_addr)) 473 random_addr = true; 474 475 /* Generate the P2P Device Address obtaining a random ethernet 476 * address with the locally administered bit set. 477 */ 478 if (random_addr) 479 eth_random_addr(p2p->dev_addr); 480 else 481 memcpy(p2p->dev_addr, dev_addr, ETH_ALEN); 482 483 /* Generate the P2P Interface Address. If the discovery and connection 484 * BSSCFGs need to simultaneously co-exist, then this address must be 485 * different from the P2P Device Address, but also locally administered. 486 */ 487 memcpy(p2p->int_addr, p2p->dev_addr, ETH_ALEN); 488 p2p->int_addr[0] |= 0x02; 489 p2p->int_addr[4] ^= 0x80; 490 } 491 492 /** 493 * brcmf_p2p_scan_is_p2p_request() - is cfg80211 scan request a P2P scan. 494 * 495 * @request: the scan request as received from cfg80211. 496 * 497 * returns true if one of the ssids in the request matches the 498 * P2P wildcard ssid; otherwise returns false. 499 */ 500 static bool brcmf_p2p_scan_is_p2p_request(struct cfg80211_scan_request *request) 501 { 502 struct cfg80211_ssid *ssids = request->ssids; 503 int i; 504 505 for (i = 0; i < request->n_ssids; i++) { 506 if (ssids[i].ssid_len != BRCMF_P2P_WILDCARD_SSID_LEN) 507 continue; 508 509 brcmf_dbg(INFO, "comparing ssid \"%s\"", ssids[i].ssid); 510 if (!memcmp(BRCMF_P2P_WILDCARD_SSID, ssids[i].ssid, 511 BRCMF_P2P_WILDCARD_SSID_LEN)) 512 return true; 513 } 514 return false; 515 } 516 517 /** 518 * brcmf_p2p_set_discover_state - set discover state in firmware. 519 * 520 * @ifp: low-level interface object. 521 * @state: discover state to set. 522 * @chanspec: channel parameters (for state @WL_P2P_DISC_ST_LISTEN only). 523 * @listen_ms: duration to listen (for state @WL_P2P_DISC_ST_LISTEN only). 524 */ 525 static s32 brcmf_p2p_set_discover_state(struct brcmf_if *ifp, u8 state, 526 u16 chanspec, u16 listen_ms) 527 { 528 struct brcmf_p2p_disc_st_le discover_state; 529 s32 ret = 0; 530 brcmf_dbg(TRACE, "enter\n"); 531 532 discover_state.state = state; 533 discover_state.chspec = cpu_to_le16(chanspec); 534 discover_state.dwell = cpu_to_le16(listen_ms); 535 ret = brcmf_fil_bsscfg_data_set(ifp, "p2p_state", &discover_state, 536 sizeof(discover_state)); 537 return ret; 538 } 539 540 /** 541 * brcmf_p2p_deinit_discovery() - disable P2P device discovery. 542 * 543 * @p2p: P2P specific data. 544 * 545 * Resets the discovery state and disables it in firmware. 546 */ 547 static s32 brcmf_p2p_deinit_discovery(struct brcmf_p2p_info *p2p) 548 { 549 struct brcmf_cfg80211_vif *vif; 550 551 brcmf_dbg(TRACE, "enter\n"); 552 553 /* Set the discovery state to SCAN */ 554 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif; 555 (void)brcmf_p2p_set_discover_state(vif->ifp, WL_P2P_DISC_ST_SCAN, 0, 0); 556 557 /* Disable P2P discovery in the firmware */ 558 vif = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif; 559 (void)brcmf_fil_iovar_int_set(vif->ifp, "p2p_disc", 0); 560 561 return 0; 562 } 563 564 /** 565 * brcmf_p2p_enable_discovery() - initialize and configure discovery. 566 * 567 * @p2p: P2P specific data. 568 * 569 * Initializes the discovery device and configure the virtual interface. 570 */ 571 static int brcmf_p2p_enable_discovery(struct brcmf_p2p_info *p2p) 572 { 573 struct brcmf_cfg80211_vif *vif; 574 s32 ret = 0; 575 576 brcmf_dbg(TRACE, "enter\n"); 577 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif; 578 if (!vif) { 579 brcmf_err("P2P config device not available\n"); 580 ret = -EPERM; 581 goto exit; 582 } 583 584 if (test_bit(BRCMF_P2P_STATUS_ENABLED, &p2p->status)) { 585 brcmf_dbg(INFO, "P2P config device already configured\n"); 586 goto exit; 587 } 588 589 /* Re-initialize P2P Discovery in the firmware */ 590 vif = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif; 591 ret = brcmf_fil_iovar_int_set(vif->ifp, "p2p_disc", 1); 592 if (ret < 0) { 593 brcmf_err("set p2p_disc error\n"); 594 goto exit; 595 } 596 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif; 597 ret = brcmf_p2p_set_discover_state(vif->ifp, WL_P2P_DISC_ST_SCAN, 0, 0); 598 if (ret < 0) { 599 brcmf_err("unable to set WL_P2P_DISC_ST_SCAN\n"); 600 goto exit; 601 } 602 603 /* 604 * Set wsec to any non-zero value in the discovery bsscfg 605 * to ensure our P2P probe responses have the privacy bit 606 * set in the 802.11 WPA IE. Some peer devices may not 607 * initiate WPS with us if this bit is not set. 608 */ 609 ret = brcmf_fil_bsscfg_int_set(vif->ifp, "wsec", AES_ENABLED); 610 if (ret < 0) { 611 brcmf_err("wsec error %d\n", ret); 612 goto exit; 613 } 614 615 set_bit(BRCMF_P2P_STATUS_ENABLED, &p2p->status); 616 exit: 617 return ret; 618 } 619 620 /** 621 * brcmf_p2p_escan() - initiate a P2P scan. 622 * 623 * @p2p: P2P specific data. 624 * @num_chans: number of channels to scan. 625 * @chanspecs: channel parameters for @num_chans channels. 626 * @search_state: P2P discover state to use. 627 * @bss_type: type of P2P bss. 628 */ 629 static s32 brcmf_p2p_escan(struct brcmf_p2p_info *p2p, u32 num_chans, 630 u16 chanspecs[], s32 search_state, 631 enum p2p_bss_type bss_type) 632 { 633 s32 ret = 0; 634 s32 memsize = offsetof(struct brcmf_p2p_scan_le, 635 eparams.params_le.channel_list); 636 s32 nprobes; 637 s32 active; 638 u32 i; 639 u8 *memblk; 640 struct brcmf_cfg80211_vif *vif; 641 struct brcmf_p2p_scan_le *p2p_params; 642 struct brcmf_scan_params_le *sparams; 643 644 memsize += num_chans * sizeof(__le16); 645 memblk = kzalloc(memsize, GFP_KERNEL); 646 if (!memblk) 647 return -ENOMEM; 648 649 vif = p2p->bss_idx[bss_type].vif; 650 if (vif == NULL) { 651 brcmf_err("no vif for bss type %d\n", bss_type); 652 ret = -EINVAL; 653 goto exit; 654 } 655 p2p_params = (struct brcmf_p2p_scan_le *)memblk; 656 sparams = &p2p_params->eparams.params_le; 657 658 switch (search_state) { 659 case WL_P2P_DISC_ST_SEARCH: 660 /* 661 * If we in SEARCH STATE, we don't need to set SSID explictly 662 * because dongle use P2P WILDCARD internally by default, use 663 * null ssid, which it is already due to kzalloc. 664 */ 665 break; 666 case WL_P2P_DISC_ST_SCAN: 667 /* 668 * wpa_supplicant has p2p_find command with type social or 669 * progressive. For progressive, we need to set the ssid to 670 * P2P WILDCARD because we just do broadcast scan unless 671 * setting SSID. 672 */ 673 sparams->ssid_le.SSID_len = 674 cpu_to_le32(BRCMF_P2P_WILDCARD_SSID_LEN); 675 memcpy(sparams->ssid_le.SSID, BRCMF_P2P_WILDCARD_SSID, 676 BRCMF_P2P_WILDCARD_SSID_LEN); 677 break; 678 default: 679 brcmf_err(" invalid search state %d\n", search_state); 680 ret = -EINVAL; 681 goto exit; 682 } 683 684 brcmf_p2p_set_discover_state(vif->ifp, search_state, 0, 0); 685 686 /* 687 * set p2p scan parameters. 688 */ 689 p2p_params->type = 'E'; 690 691 /* determine the scan engine parameters */ 692 sparams->bss_type = DOT11_BSSTYPE_ANY; 693 sparams->scan_type = BRCMF_SCANTYPE_ACTIVE; 694 695 eth_broadcast_addr(sparams->bssid); 696 sparams->home_time = cpu_to_le32(P2PAPI_SCAN_HOME_TIME_MS); 697 698 /* 699 * SOCIAL_CHAN_CNT + 1 takes care of the Progressive scan 700 * supported by the supplicant. 701 */ 702 if (num_chans == SOCIAL_CHAN_CNT || num_chans == (SOCIAL_CHAN_CNT + 1)) 703 active = P2PAPI_SCAN_SOCIAL_DWELL_TIME_MS; 704 else if (num_chans == AF_PEER_SEARCH_CNT) 705 active = P2PAPI_SCAN_AF_SEARCH_DWELL_TIME_MS; 706 else if (brcmf_get_vif_state_any(p2p->cfg, BRCMF_VIF_STATUS_CONNECTED)) 707 active = -1; 708 else 709 active = P2PAPI_SCAN_DWELL_TIME_MS; 710 711 /* Override scan params to find a peer for a connection */ 712 if (num_chans == 1) { 713 active = WL_SCAN_CONNECT_DWELL_TIME_MS; 714 /* WAR to sync with presence period of VSDB GO. 715 * send probe request more frequently 716 */ 717 nprobes = active / WL_SCAN_JOIN_PROBE_INTERVAL_MS; 718 } else { 719 nprobes = active / P2PAPI_SCAN_NPROBS_TIME_MS; 720 } 721 722 if (nprobes <= 0) 723 nprobes = 1; 724 725 brcmf_dbg(INFO, "nprobes # %d, active_time %d\n", nprobes, active); 726 sparams->active_time = cpu_to_le32(active); 727 sparams->nprobes = cpu_to_le32(nprobes); 728 sparams->passive_time = cpu_to_le32(-1); 729 sparams->channel_num = cpu_to_le32(num_chans & 730 BRCMF_SCAN_PARAMS_COUNT_MASK); 731 for (i = 0; i < num_chans; i++) 732 sparams->channel_list[i] = cpu_to_le16(chanspecs[i]); 733 734 /* set the escan specific parameters */ 735 p2p_params->eparams.version = cpu_to_le32(BRCMF_ESCAN_REQ_VERSION); 736 p2p_params->eparams.action = cpu_to_le16(WL_ESCAN_ACTION_START); 737 p2p_params->eparams.sync_id = cpu_to_le16(0x1234); 738 /* perform p2p scan on primary device */ 739 ret = brcmf_fil_bsscfg_data_set(vif->ifp, "p2p_scan", memblk, memsize); 740 if (!ret) 741 set_bit(BRCMF_SCAN_STATUS_BUSY, &p2p->cfg->scan_status); 742 exit: 743 kfree(memblk); 744 return ret; 745 } 746 747 /** 748 * brcmf_p2p_run_escan() - escan callback for peer-to-peer. 749 * 750 * @cfg: driver private data for cfg80211 interface. 751 * @ndev: net device for which scan is requested. 752 * @request: scan request from cfg80211. 753 * @action: scan action. 754 * 755 * Determines the P2P discovery state based to scan request parameters and 756 * validates the channels in the request. 757 */ 758 static s32 brcmf_p2p_run_escan(struct brcmf_cfg80211_info *cfg, 759 struct brcmf_if *ifp, 760 struct cfg80211_scan_request *request) 761 { 762 struct brcmf_p2p_info *p2p = &cfg->p2p; 763 s32 err = 0; 764 s32 search_state = WL_P2P_DISC_ST_SCAN; 765 struct brcmf_cfg80211_vif *vif; 766 struct net_device *dev = NULL; 767 int i, num_nodfs = 0; 768 u16 *chanspecs; 769 770 brcmf_dbg(TRACE, "enter\n"); 771 772 if (!request) { 773 err = -EINVAL; 774 goto exit; 775 } 776 777 if (request->n_channels) { 778 chanspecs = kcalloc(request->n_channels, sizeof(*chanspecs), 779 GFP_KERNEL); 780 if (!chanspecs) { 781 err = -ENOMEM; 782 goto exit; 783 } 784 vif = p2p->bss_idx[P2PAPI_BSSCFG_CONNECTION].vif; 785 if (vif) 786 dev = vif->wdev.netdev; 787 if (request->n_channels == 3 && 788 request->channels[0]->hw_value == SOCIAL_CHAN_1 && 789 request->channels[1]->hw_value == SOCIAL_CHAN_2 && 790 request->channels[2]->hw_value == SOCIAL_CHAN_3) { 791 /* SOCIAL CHANNELS 1, 6, 11 */ 792 search_state = WL_P2P_DISC_ST_SEARCH; 793 brcmf_dbg(INFO, "P2P SEARCH PHASE START\n"); 794 } else if (dev != NULL && 795 vif->wdev.iftype == NL80211_IFTYPE_P2P_GO) { 796 /* If you are already a GO, then do SEARCH only */ 797 brcmf_dbg(INFO, "Already a GO. Do SEARCH Only\n"); 798 search_state = WL_P2P_DISC_ST_SEARCH; 799 } else { 800 brcmf_dbg(INFO, "P2P SCAN STATE START\n"); 801 } 802 803 /* 804 * no P2P scanning on passive or DFS channels. 805 */ 806 for (i = 0; i < request->n_channels; i++) { 807 struct ieee80211_channel *chan = request->channels[i]; 808 809 if (chan->flags & (IEEE80211_CHAN_RADAR | 810 IEEE80211_CHAN_NO_IR)) 811 continue; 812 813 chanspecs[i] = channel_to_chanspec(&p2p->cfg->d11inf, 814 chan); 815 brcmf_dbg(INFO, "%d: chan=%d, channel spec=%x\n", 816 num_nodfs, chan->hw_value, chanspecs[i]); 817 num_nodfs++; 818 } 819 err = brcmf_p2p_escan(p2p, num_nodfs, chanspecs, search_state, 820 P2PAPI_BSSCFG_DEVICE); 821 kfree(chanspecs); 822 } 823 exit: 824 if (err) 825 brcmf_err("error (%d)\n", err); 826 return err; 827 } 828 829 830 /** 831 * brcmf_p2p_find_listen_channel() - find listen channel in ie string. 832 * 833 * @ie: string of information elements. 834 * @ie_len: length of string. 835 * 836 * Scan ie for p2p ie and look for attribute 6 channel. If available determine 837 * channel and return it. 838 */ 839 static s32 brcmf_p2p_find_listen_channel(const u8 *ie, u32 ie_len) 840 { 841 u8 channel_ie[5]; 842 s32 listen_channel; 843 s32 err; 844 845 err = cfg80211_get_p2p_attr(ie, ie_len, 846 IEEE80211_P2P_ATTR_LISTEN_CHANNEL, 847 channel_ie, sizeof(channel_ie)); 848 if (err < 0) 849 return err; 850 851 /* listen channel subel length format: */ 852 /* 3(country) + 1(op. class) + 1(chan num) */ 853 listen_channel = (s32)channel_ie[3 + 1]; 854 855 if (listen_channel == SOCIAL_CHAN_1 || 856 listen_channel == SOCIAL_CHAN_2 || 857 listen_channel == SOCIAL_CHAN_3) { 858 brcmf_dbg(INFO, "Found my Listen Channel %d\n", listen_channel); 859 return listen_channel; 860 } 861 862 return -EPERM; 863 } 864 865 866 /** 867 * brcmf_p2p_scan_prep() - prepare scan based on request. 868 * 869 * @wiphy: wiphy device. 870 * @request: scan request from cfg80211. 871 * @vif: vif on which scan request is to be executed. 872 * 873 * Prepare the scan appropriately for type of scan requested. Overrides the 874 * escan .run() callback for peer-to-peer scanning. 875 */ 876 int brcmf_p2p_scan_prep(struct wiphy *wiphy, 877 struct cfg80211_scan_request *request, 878 struct brcmf_cfg80211_vif *vif) 879 { 880 struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy); 881 struct brcmf_p2p_info *p2p = &cfg->p2p; 882 int err; 883 884 if (brcmf_p2p_scan_is_p2p_request(request)) { 885 /* find my listen channel */ 886 err = brcmf_p2p_find_listen_channel(request->ie, 887 request->ie_len); 888 if (err < 0) 889 return err; 890 891 p2p->afx_hdl.my_listen_chan = err; 892 893 clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status); 894 brcmf_dbg(INFO, "P2P: GO_NEG_PHASE status cleared\n"); 895 896 err = brcmf_p2p_enable_discovery(p2p); 897 if (err) 898 return err; 899 900 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif; 901 902 /* override .run_escan() callback. */ 903 cfg->escan_info.run = brcmf_p2p_run_escan; 904 } 905 return 0; 906 } 907 908 909 /** 910 * brcmf_p2p_discover_listen() - set firmware to discover listen state. 911 * 912 * @p2p: p2p device. 913 * @channel: channel nr for discover listen. 914 * @duration: time in ms to stay on channel. 915 * 916 */ 917 static s32 918 brcmf_p2p_discover_listen(struct brcmf_p2p_info *p2p, u16 channel, u32 duration) 919 { 920 struct brcmf_cfg80211_vif *vif; 921 struct brcmu_chan ch; 922 s32 err = 0; 923 924 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif; 925 if (!vif) { 926 brcmf_err("Discovery is not set, so we have nothing to do\n"); 927 err = -EPERM; 928 goto exit; 929 } 930 931 if (test_bit(BRCMF_P2P_STATUS_DISCOVER_LISTEN, &p2p->status)) { 932 brcmf_err("Previous LISTEN is not completed yet\n"); 933 /* WAR: prevent cookie mismatch in wpa_supplicant return OK */ 934 goto exit; 935 } 936 937 ch.chnum = channel; 938 ch.bw = BRCMU_CHAN_BW_20; 939 p2p->cfg->d11inf.encchspec(&ch); 940 err = brcmf_p2p_set_discover_state(vif->ifp, WL_P2P_DISC_ST_LISTEN, 941 ch.chspec, (u16)duration); 942 if (!err) { 943 set_bit(BRCMF_P2P_STATUS_DISCOVER_LISTEN, &p2p->status); 944 p2p->remain_on_channel_cookie++; 945 } 946 exit: 947 return err; 948 } 949 950 951 /** 952 * brcmf_p2p_remain_on_channel() - put device on channel and stay there. 953 * 954 * @wiphy: wiphy device. 955 * @channel: channel to stay on. 956 * @duration: time in ms to remain on channel. 957 * 958 */ 959 int brcmf_p2p_remain_on_channel(struct wiphy *wiphy, struct wireless_dev *wdev, 960 struct ieee80211_channel *channel, 961 unsigned int duration, u64 *cookie) 962 { 963 struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy); 964 struct brcmf_p2p_info *p2p = &cfg->p2p; 965 s32 err; 966 u16 channel_nr; 967 968 channel_nr = ieee80211_frequency_to_channel(channel->center_freq); 969 brcmf_dbg(TRACE, "Enter, channel: %d, duration ms (%d)\n", channel_nr, 970 duration); 971 972 err = brcmf_p2p_enable_discovery(p2p); 973 if (err) 974 goto exit; 975 err = brcmf_p2p_discover_listen(p2p, channel_nr, duration); 976 if (err) 977 goto exit; 978 979 memcpy(&p2p->remain_on_channel, channel, sizeof(*channel)); 980 *cookie = p2p->remain_on_channel_cookie; 981 cfg80211_ready_on_channel(wdev, *cookie, channel, duration, GFP_KERNEL); 982 983 exit: 984 return err; 985 } 986 987 988 /** 989 * brcmf_p2p_notify_listen_complete() - p2p listen has completed. 990 * 991 * @ifp: interfac control. 992 * @e: event message. Not used, to make it usable for fweh event dispatcher. 993 * @data: payload of message. Not used. 994 * 995 */ 996 int brcmf_p2p_notify_listen_complete(struct brcmf_if *ifp, 997 const struct brcmf_event_msg *e, 998 void *data) 999 { 1000 struct brcmf_cfg80211_info *cfg = ifp->drvr->config; 1001 struct brcmf_p2p_info *p2p = &cfg->p2p; 1002 1003 brcmf_dbg(TRACE, "Enter\n"); 1004 if (test_and_clear_bit(BRCMF_P2P_STATUS_DISCOVER_LISTEN, 1005 &p2p->status)) { 1006 if (test_and_clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_AF_LISTEN, 1007 &p2p->status)) { 1008 clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, 1009 &p2p->status); 1010 brcmf_dbg(INFO, "Listen DONE, wake up wait_next_af\n"); 1011 complete(&p2p->wait_next_af); 1012 } 1013 1014 cfg80211_remain_on_channel_expired(&ifp->vif->wdev, 1015 p2p->remain_on_channel_cookie, 1016 &p2p->remain_on_channel, 1017 GFP_KERNEL); 1018 } 1019 return 0; 1020 } 1021 1022 1023 /** 1024 * brcmf_p2p_cancel_remain_on_channel() - cancel p2p listen state. 1025 * 1026 * @ifp: interfac control. 1027 * 1028 */ 1029 void brcmf_p2p_cancel_remain_on_channel(struct brcmf_if *ifp) 1030 { 1031 if (!ifp) 1032 return; 1033 brcmf_p2p_set_discover_state(ifp, WL_P2P_DISC_ST_SCAN, 0, 0); 1034 brcmf_p2p_notify_listen_complete(ifp, NULL, NULL); 1035 } 1036 1037 1038 /** 1039 * brcmf_p2p_act_frm_search() - search function for action frame. 1040 * 1041 * @p2p: p2p device. 1042 * channel: channel on which action frame is to be trasmitted. 1043 * 1044 * search function to reach at common channel to send action frame. When 1045 * channel is 0 then all social channels will be used to send af 1046 */ 1047 static s32 brcmf_p2p_act_frm_search(struct brcmf_p2p_info *p2p, u16 channel) 1048 { 1049 s32 err; 1050 u32 channel_cnt; 1051 u16 *default_chan_list; 1052 u32 i; 1053 struct brcmu_chan ch; 1054 1055 brcmf_dbg(TRACE, "Enter\n"); 1056 1057 if (channel) 1058 channel_cnt = AF_PEER_SEARCH_CNT; 1059 else 1060 channel_cnt = SOCIAL_CHAN_CNT; 1061 default_chan_list = kcalloc(channel_cnt, sizeof(*default_chan_list), 1062 GFP_KERNEL); 1063 if (default_chan_list == NULL) { 1064 brcmf_err("channel list allocation failed\n"); 1065 err = -ENOMEM; 1066 goto exit; 1067 } 1068 ch.bw = BRCMU_CHAN_BW_20; 1069 if (channel) { 1070 ch.chnum = channel; 1071 p2p->cfg->d11inf.encchspec(&ch); 1072 /* insert same channel to the chan_list */ 1073 for (i = 0; i < channel_cnt; i++) 1074 default_chan_list[i] = ch.chspec; 1075 } else { 1076 ch.chnum = SOCIAL_CHAN_1; 1077 p2p->cfg->d11inf.encchspec(&ch); 1078 default_chan_list[0] = ch.chspec; 1079 ch.chnum = SOCIAL_CHAN_2; 1080 p2p->cfg->d11inf.encchspec(&ch); 1081 default_chan_list[1] = ch.chspec; 1082 ch.chnum = SOCIAL_CHAN_3; 1083 p2p->cfg->d11inf.encchspec(&ch); 1084 default_chan_list[2] = ch.chspec; 1085 } 1086 err = brcmf_p2p_escan(p2p, channel_cnt, default_chan_list, 1087 WL_P2P_DISC_ST_SEARCH, P2PAPI_BSSCFG_DEVICE); 1088 kfree(default_chan_list); 1089 exit: 1090 return err; 1091 } 1092 1093 1094 /** 1095 * brcmf_p2p_afx_handler() - afx worker thread. 1096 * 1097 * @work: 1098 * 1099 */ 1100 static void brcmf_p2p_afx_handler(struct work_struct *work) 1101 { 1102 struct afx_hdl *afx_hdl = container_of(work, struct afx_hdl, afx_work); 1103 struct brcmf_p2p_info *p2p = container_of(afx_hdl, 1104 struct brcmf_p2p_info, 1105 afx_hdl); 1106 s32 err; 1107 1108 if (!afx_hdl->is_active) 1109 return; 1110 1111 if (afx_hdl->is_listen && afx_hdl->my_listen_chan) 1112 /* 100ms ~ 300ms */ 1113 err = brcmf_p2p_discover_listen(p2p, afx_hdl->my_listen_chan, 1114 100 * (1 + prandom_u32() % 3)); 1115 else 1116 err = brcmf_p2p_act_frm_search(p2p, afx_hdl->peer_listen_chan); 1117 1118 if (err) { 1119 brcmf_err("ERROR occurred! value is (%d)\n", err); 1120 if (test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, 1121 &p2p->status)) 1122 complete(&afx_hdl->act_frm_scan); 1123 } 1124 } 1125 1126 1127 /** 1128 * brcmf_p2p_af_searching_channel() - search channel. 1129 * 1130 * @p2p: p2p device info struct. 1131 * 1132 */ 1133 static s32 brcmf_p2p_af_searching_channel(struct brcmf_p2p_info *p2p) 1134 { 1135 struct afx_hdl *afx_hdl = &p2p->afx_hdl; 1136 struct brcmf_cfg80211_vif *pri_vif; 1137 unsigned long duration; 1138 s32 retry; 1139 1140 brcmf_dbg(TRACE, "Enter\n"); 1141 1142 pri_vif = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif; 1143 1144 reinit_completion(&afx_hdl->act_frm_scan); 1145 set_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status); 1146 afx_hdl->is_active = true; 1147 afx_hdl->peer_chan = P2P_INVALID_CHANNEL; 1148 1149 /* Loop to wait until we find a peer's channel or the 1150 * pending action frame tx is cancelled. 1151 */ 1152 retry = 0; 1153 duration = msecs_to_jiffies(P2P_AF_FRM_SCAN_MAX_WAIT); 1154 while ((retry < P2P_CHANNEL_SYNC_RETRY) && 1155 (afx_hdl->peer_chan == P2P_INVALID_CHANNEL)) { 1156 afx_hdl->is_listen = false; 1157 brcmf_dbg(TRACE, "Scheduling action frame for sending.. (%d)\n", 1158 retry); 1159 /* search peer on peer's listen channel */ 1160 schedule_work(&afx_hdl->afx_work); 1161 wait_for_completion_timeout(&afx_hdl->act_frm_scan, duration); 1162 if ((afx_hdl->peer_chan != P2P_INVALID_CHANNEL) || 1163 (!test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, 1164 &p2p->status))) 1165 break; 1166 1167 if (afx_hdl->my_listen_chan) { 1168 brcmf_dbg(TRACE, "Scheduling listen peer, channel=%d\n", 1169 afx_hdl->my_listen_chan); 1170 /* listen on my listen channel */ 1171 afx_hdl->is_listen = true; 1172 schedule_work(&afx_hdl->afx_work); 1173 wait_for_completion_timeout(&afx_hdl->act_frm_scan, 1174 duration); 1175 } 1176 if ((afx_hdl->peer_chan != P2P_INVALID_CHANNEL) || 1177 (!test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, 1178 &p2p->status))) 1179 break; 1180 retry++; 1181 1182 /* if sta is connected or connecting, sleep for a while before 1183 * retry af tx or finding a peer 1184 */ 1185 if (test_bit(BRCMF_VIF_STATUS_CONNECTED, &pri_vif->sme_state) || 1186 test_bit(BRCMF_VIF_STATUS_CONNECTING, &pri_vif->sme_state)) 1187 msleep(P2P_DEFAULT_SLEEP_TIME_VSDB); 1188 } 1189 1190 brcmf_dbg(TRACE, "Completed search/listen peer_chan=%d\n", 1191 afx_hdl->peer_chan); 1192 afx_hdl->is_active = false; 1193 1194 clear_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status); 1195 1196 return afx_hdl->peer_chan; 1197 } 1198 1199 1200 /** 1201 * brcmf_p2p_scan_finding_common_channel() - was escan used for finding channel 1202 * 1203 * @cfg: common configuration struct. 1204 * @bi: bss info struct, result from scan. 1205 * 1206 */ 1207 bool brcmf_p2p_scan_finding_common_channel(struct brcmf_cfg80211_info *cfg, 1208 struct brcmf_bss_info_le *bi) 1209 1210 { 1211 struct brcmf_p2p_info *p2p = &cfg->p2p; 1212 struct afx_hdl *afx_hdl = &p2p->afx_hdl; 1213 struct brcmu_chan ch; 1214 u8 *ie; 1215 s32 err; 1216 u8 p2p_dev_addr[ETH_ALEN]; 1217 1218 if (!test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status)) 1219 return false; 1220 1221 if (bi == NULL) { 1222 brcmf_dbg(TRACE, "ACTION FRAME SCAN Done\n"); 1223 if (afx_hdl->peer_chan == P2P_INVALID_CHANNEL) 1224 complete(&afx_hdl->act_frm_scan); 1225 return true; 1226 } 1227 1228 ie = ((u8 *)bi) + le16_to_cpu(bi->ie_offset); 1229 memset(p2p_dev_addr, 0, sizeof(p2p_dev_addr)); 1230 err = cfg80211_get_p2p_attr(ie, le32_to_cpu(bi->ie_length), 1231 IEEE80211_P2P_ATTR_DEVICE_INFO, 1232 p2p_dev_addr, sizeof(p2p_dev_addr)); 1233 if (err < 0) 1234 err = cfg80211_get_p2p_attr(ie, le32_to_cpu(bi->ie_length), 1235 IEEE80211_P2P_ATTR_DEVICE_ID, 1236 p2p_dev_addr, sizeof(p2p_dev_addr)); 1237 if ((err >= 0) && 1238 (ether_addr_equal(p2p_dev_addr, afx_hdl->tx_dst_addr))) { 1239 if (!bi->ctl_ch) { 1240 ch.chspec = le16_to_cpu(bi->chanspec); 1241 cfg->d11inf.decchspec(&ch); 1242 bi->ctl_ch = ch.control_ch_num; 1243 } 1244 afx_hdl->peer_chan = bi->ctl_ch; 1245 brcmf_dbg(TRACE, "ACTION FRAME SCAN : Peer %pM found, channel : %d\n", 1246 afx_hdl->tx_dst_addr, afx_hdl->peer_chan); 1247 complete(&afx_hdl->act_frm_scan); 1248 } 1249 return true; 1250 } 1251 1252 /** 1253 * brcmf_p2p_stop_wait_next_action_frame() - finish scan if af tx complete. 1254 * 1255 * @cfg: common configuration struct. 1256 * 1257 */ 1258 static void 1259 brcmf_p2p_stop_wait_next_action_frame(struct brcmf_cfg80211_info *cfg) 1260 { 1261 struct brcmf_p2p_info *p2p = &cfg->p2p; 1262 struct brcmf_if *ifp = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->ifp; 1263 1264 if (test_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status) && 1265 (test_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status) || 1266 test_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status))) { 1267 brcmf_dbg(TRACE, "*** Wake UP ** abort actframe iovar\n"); 1268 /* if channel is not zero, "actfame" uses off channel scan. 1269 * So abort scan for off channel completion. 1270 */ 1271 if (p2p->af_sent_channel) 1272 brcmf_notify_escan_complete(cfg, ifp, true, true); 1273 } else if (test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_AF_LISTEN, 1274 &p2p->status)) { 1275 brcmf_dbg(TRACE, "*** Wake UP ** abort listen for next af frame\n"); 1276 /* So abort scan to cancel listen */ 1277 brcmf_notify_escan_complete(cfg, ifp, true, true); 1278 } 1279 } 1280 1281 1282 /** 1283 * brcmf_p2p_gon_req_collision() - Check if go negotiaton collission 1284 * 1285 * @p2p: p2p device info struct. 1286 * 1287 * return true if recevied action frame is to be dropped. 1288 */ 1289 static bool 1290 brcmf_p2p_gon_req_collision(struct brcmf_p2p_info *p2p, u8 *mac) 1291 { 1292 struct brcmf_cfg80211_info *cfg = p2p->cfg; 1293 struct brcmf_if *ifp; 1294 1295 brcmf_dbg(TRACE, "Enter\n"); 1296 1297 if (!test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status) || 1298 !p2p->gon_req_action) 1299 return false; 1300 1301 brcmf_dbg(TRACE, "GO Negotiation Request COLLISION !!!\n"); 1302 /* if sa(peer) addr is less than da(my) addr, then this device 1303 * process peer's gon request and block to send gon req. 1304 * if not (sa addr > da addr), 1305 * this device will process gon request and drop gon req of peer. 1306 */ 1307 ifp = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif->ifp; 1308 if (memcmp(mac, ifp->mac_addr, ETH_ALEN) < 0) { 1309 brcmf_dbg(INFO, "Block transmit gon req !!!\n"); 1310 p2p->block_gon_req_tx = true; 1311 /* if we are finding a common channel for sending af, 1312 * do not scan more to block to send current gon req 1313 */ 1314 if (test_and_clear_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, 1315 &p2p->status)) 1316 complete(&p2p->afx_hdl.act_frm_scan); 1317 if (test_and_clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, 1318 &p2p->status)) 1319 brcmf_p2p_stop_wait_next_action_frame(cfg); 1320 return false; 1321 } 1322 1323 /* drop gon request of peer to process gon request by this device. */ 1324 brcmf_dbg(INFO, "Drop received gon req !!!\n"); 1325 1326 return true; 1327 } 1328 1329 1330 /** 1331 * brcmf_p2p_notify_action_frame_rx() - received action frame. 1332 * 1333 * @ifp: interfac control. 1334 * @e: event message. Not used, to make it usable for fweh event dispatcher. 1335 * @data: payload of message, containing action frame data. 1336 * 1337 */ 1338 int brcmf_p2p_notify_action_frame_rx(struct brcmf_if *ifp, 1339 const struct brcmf_event_msg *e, 1340 void *data) 1341 { 1342 struct brcmf_cfg80211_info *cfg = ifp->drvr->config; 1343 struct brcmf_p2p_info *p2p = &cfg->p2p; 1344 struct afx_hdl *afx_hdl = &p2p->afx_hdl; 1345 struct wireless_dev *wdev; 1346 u32 mgmt_frame_len = e->datalen - sizeof(struct brcmf_rx_mgmt_data); 1347 struct brcmf_rx_mgmt_data *rxframe = (struct brcmf_rx_mgmt_data *)data; 1348 u8 *frame = (u8 *)(rxframe + 1); 1349 struct brcmf_p2p_pub_act_frame *act_frm; 1350 struct brcmf_p2psd_gas_pub_act_frame *sd_act_frm; 1351 struct brcmu_chan ch; 1352 struct ieee80211_mgmt *mgmt_frame; 1353 s32 freq; 1354 u16 mgmt_type; 1355 u8 action; 1356 1357 if (e->datalen < sizeof(*rxframe)) { 1358 brcmf_dbg(SCAN, "Event data to small. Ignore\n"); 1359 return 0; 1360 } 1361 1362 ch.chspec = be16_to_cpu(rxframe->chanspec); 1363 cfg->d11inf.decchspec(&ch); 1364 /* Check if wpa_supplicant has registered for this frame */ 1365 brcmf_dbg(INFO, "ifp->vif->mgmt_rx_reg %04x\n", ifp->vif->mgmt_rx_reg); 1366 mgmt_type = (IEEE80211_STYPE_ACTION & IEEE80211_FCTL_STYPE) >> 4; 1367 if ((ifp->vif->mgmt_rx_reg & BIT(mgmt_type)) == 0) 1368 return 0; 1369 1370 brcmf_p2p_print_actframe(false, frame, mgmt_frame_len); 1371 1372 action = P2P_PAF_SUBTYPE_INVALID; 1373 if (brcmf_p2p_is_pub_action(frame, mgmt_frame_len)) { 1374 act_frm = (struct brcmf_p2p_pub_act_frame *)frame; 1375 action = act_frm->subtype; 1376 if ((action == P2P_PAF_GON_REQ) && 1377 (brcmf_p2p_gon_req_collision(p2p, (u8 *)e->addr))) { 1378 if (test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, 1379 &p2p->status) && 1380 (ether_addr_equal(afx_hdl->tx_dst_addr, e->addr))) { 1381 afx_hdl->peer_chan = ch.control_ch_num; 1382 brcmf_dbg(INFO, "GON request: Peer found, channel=%d\n", 1383 afx_hdl->peer_chan); 1384 complete(&afx_hdl->act_frm_scan); 1385 } 1386 return 0; 1387 } 1388 /* After complete GO Negotiation, roll back to mpc mode */ 1389 if ((action == P2P_PAF_GON_CONF) || 1390 (action == P2P_PAF_PROVDIS_RSP)) 1391 brcmf_set_mpc(ifp, 1); 1392 if (action == P2P_PAF_GON_CONF) { 1393 brcmf_dbg(TRACE, "P2P: GO_NEG_PHASE status cleared\n"); 1394 clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status); 1395 } 1396 } else if (brcmf_p2p_is_gas_action(frame, mgmt_frame_len)) { 1397 sd_act_frm = (struct brcmf_p2psd_gas_pub_act_frame *)frame; 1398 action = sd_act_frm->action; 1399 } 1400 1401 if (test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status) && 1402 (p2p->next_af_subtype == action)) { 1403 brcmf_dbg(TRACE, "We got a right next frame! (%d)\n", action); 1404 clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, 1405 &p2p->status); 1406 /* Stop waiting for next AF. */ 1407 brcmf_p2p_stop_wait_next_action_frame(cfg); 1408 } 1409 1410 mgmt_frame = kzalloc(offsetof(struct ieee80211_mgmt, u) + 1411 mgmt_frame_len, GFP_KERNEL); 1412 if (!mgmt_frame) { 1413 brcmf_err("No memory available for action frame\n"); 1414 return -ENOMEM; 1415 } 1416 memcpy(mgmt_frame->da, ifp->mac_addr, ETH_ALEN); 1417 brcmf_fil_cmd_data_get(ifp, BRCMF_C_GET_BSSID, mgmt_frame->bssid, 1418 ETH_ALEN); 1419 memcpy(mgmt_frame->sa, e->addr, ETH_ALEN); 1420 mgmt_frame->frame_control = cpu_to_le16(IEEE80211_STYPE_ACTION); 1421 memcpy(&mgmt_frame->u, frame, mgmt_frame_len); 1422 mgmt_frame_len += offsetof(struct ieee80211_mgmt, u); 1423 1424 freq = ieee80211_channel_to_frequency(ch.control_ch_num, 1425 ch.band == BRCMU_CHAN_BAND_2G ? 1426 NL80211_BAND_2GHZ : 1427 NL80211_BAND_5GHZ); 1428 1429 wdev = &ifp->vif->wdev; 1430 cfg80211_rx_mgmt(wdev, freq, 0, (u8 *)mgmt_frame, mgmt_frame_len, 0); 1431 1432 kfree(mgmt_frame); 1433 return 0; 1434 } 1435 1436 1437 /** 1438 * brcmf_p2p_notify_action_tx_complete() - transmit action frame complete 1439 * 1440 * @ifp: interfac control. 1441 * @e: event message. Not used, to make it usable for fweh event dispatcher. 1442 * @data: not used. 1443 * 1444 */ 1445 int brcmf_p2p_notify_action_tx_complete(struct brcmf_if *ifp, 1446 const struct brcmf_event_msg *e, 1447 void *data) 1448 { 1449 struct brcmf_cfg80211_info *cfg = ifp->drvr->config; 1450 struct brcmf_p2p_info *p2p = &cfg->p2p; 1451 1452 brcmf_dbg(INFO, "Enter: event %s, status=%d\n", 1453 e->event_code == BRCMF_E_ACTION_FRAME_OFF_CHAN_COMPLETE ? 1454 "ACTION_FRAME_OFF_CHAN_COMPLETE" : "ACTION_FRAME_COMPLETE", 1455 e->status); 1456 1457 if (!test_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status)) 1458 return 0; 1459 1460 if (e->event_code == BRCMF_E_ACTION_FRAME_COMPLETE) { 1461 if (e->status == BRCMF_E_STATUS_SUCCESS) 1462 set_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, 1463 &p2p->status); 1464 else { 1465 set_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status); 1466 /* If there is no ack, we don't need to wait for 1467 * WLC_E_ACTION_FRAME_OFFCHAN_COMPLETE event 1468 */ 1469 brcmf_p2p_stop_wait_next_action_frame(cfg); 1470 } 1471 1472 } else { 1473 complete(&p2p->send_af_done); 1474 } 1475 return 0; 1476 } 1477 1478 1479 /** 1480 * brcmf_p2p_tx_action_frame() - send action frame over fil. 1481 * 1482 * @p2p: p2p info struct for vif. 1483 * @af_params: action frame data/info. 1484 * 1485 * Send an action frame immediately without doing channel synchronization. 1486 * 1487 * This function waits for a completion event before returning. 1488 * The WLC_E_ACTION_FRAME_COMPLETE event will be received when the action 1489 * frame is transmitted. 1490 */ 1491 static s32 brcmf_p2p_tx_action_frame(struct brcmf_p2p_info *p2p, 1492 struct brcmf_fil_af_params_le *af_params) 1493 { 1494 struct brcmf_cfg80211_vif *vif; 1495 s32 err = 0; 1496 s32 timeout = 0; 1497 1498 brcmf_dbg(TRACE, "Enter\n"); 1499 1500 reinit_completion(&p2p->send_af_done); 1501 clear_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status); 1502 clear_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status); 1503 1504 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif; 1505 err = brcmf_fil_bsscfg_data_set(vif->ifp, "actframe", af_params, 1506 sizeof(*af_params)); 1507 if (err) { 1508 brcmf_err(" sending action frame has failed\n"); 1509 goto exit; 1510 } 1511 1512 p2p->af_sent_channel = le32_to_cpu(af_params->channel); 1513 p2p->af_tx_sent_jiffies = jiffies; 1514 1515 timeout = wait_for_completion_timeout(&p2p->send_af_done, 1516 P2P_AF_MAX_WAIT_TIME); 1517 1518 if (test_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status)) { 1519 brcmf_dbg(TRACE, "TX action frame operation is success\n"); 1520 } else { 1521 err = -EIO; 1522 brcmf_dbg(TRACE, "TX action frame operation has failed\n"); 1523 } 1524 /* clear status bit for action tx */ 1525 clear_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status); 1526 clear_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status); 1527 1528 exit: 1529 return err; 1530 } 1531 1532 1533 /** 1534 * brcmf_p2p_pub_af_tx() - public action frame tx routine. 1535 * 1536 * @cfg: driver private data for cfg80211 interface. 1537 * @af_params: action frame data/info. 1538 * @config_af_params: configuration data for action frame. 1539 * 1540 * routine which transmits ation frame public type. 1541 */ 1542 static s32 brcmf_p2p_pub_af_tx(struct brcmf_cfg80211_info *cfg, 1543 struct brcmf_fil_af_params_le *af_params, 1544 struct brcmf_config_af_params *config_af_params) 1545 { 1546 struct brcmf_p2p_info *p2p = &cfg->p2p; 1547 struct brcmf_fil_action_frame_le *action_frame; 1548 struct brcmf_p2p_pub_act_frame *act_frm; 1549 s32 err = 0; 1550 u16 ie_len; 1551 1552 action_frame = &af_params->action_frame; 1553 act_frm = (struct brcmf_p2p_pub_act_frame *)(action_frame->data); 1554 1555 config_af_params->extra_listen = true; 1556 1557 switch (act_frm->subtype) { 1558 case P2P_PAF_GON_REQ: 1559 brcmf_dbg(TRACE, "P2P: GO_NEG_PHASE status set\n"); 1560 set_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status); 1561 config_af_params->mpc_onoff = 0; 1562 config_af_params->search_channel = true; 1563 p2p->next_af_subtype = act_frm->subtype + 1; 1564 p2p->gon_req_action = true; 1565 /* increase dwell time to wait for RESP frame */ 1566 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME); 1567 break; 1568 case P2P_PAF_GON_RSP: 1569 p2p->next_af_subtype = act_frm->subtype + 1; 1570 /* increase dwell time to wait for CONF frame */ 1571 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME); 1572 break; 1573 case P2P_PAF_GON_CONF: 1574 /* If we reached till GO Neg confirmation reset the filter */ 1575 brcmf_dbg(TRACE, "P2P: GO_NEG_PHASE status cleared\n"); 1576 clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status); 1577 /* turn on mpc again if go nego is done */ 1578 config_af_params->mpc_onoff = 1; 1579 /* minimize dwell time */ 1580 af_params->dwell_time = cpu_to_le32(P2P_AF_MIN_DWELL_TIME); 1581 config_af_params->extra_listen = false; 1582 break; 1583 case P2P_PAF_INVITE_REQ: 1584 config_af_params->search_channel = true; 1585 p2p->next_af_subtype = act_frm->subtype + 1; 1586 /* increase dwell time */ 1587 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME); 1588 break; 1589 case P2P_PAF_INVITE_RSP: 1590 /* minimize dwell time */ 1591 af_params->dwell_time = cpu_to_le32(P2P_AF_MIN_DWELL_TIME); 1592 config_af_params->extra_listen = false; 1593 break; 1594 case P2P_PAF_DEVDIS_REQ: 1595 config_af_params->search_channel = true; 1596 p2p->next_af_subtype = act_frm->subtype + 1; 1597 /* maximize dwell time to wait for RESP frame */ 1598 af_params->dwell_time = cpu_to_le32(P2P_AF_LONG_DWELL_TIME); 1599 break; 1600 case P2P_PAF_DEVDIS_RSP: 1601 /* minimize dwell time */ 1602 af_params->dwell_time = cpu_to_le32(P2P_AF_MIN_DWELL_TIME); 1603 config_af_params->extra_listen = false; 1604 break; 1605 case P2P_PAF_PROVDIS_REQ: 1606 ie_len = le16_to_cpu(action_frame->len) - 1607 offsetof(struct brcmf_p2p_pub_act_frame, elts); 1608 if (cfg80211_get_p2p_attr(&act_frm->elts[0], ie_len, 1609 IEEE80211_P2P_ATTR_GROUP_ID, 1610 NULL, 0) < 0) 1611 config_af_params->search_channel = true; 1612 config_af_params->mpc_onoff = 0; 1613 p2p->next_af_subtype = act_frm->subtype + 1; 1614 /* increase dwell time to wait for RESP frame */ 1615 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME); 1616 break; 1617 case P2P_PAF_PROVDIS_RSP: 1618 /* wpa_supplicant send go nego req right after prov disc */ 1619 p2p->next_af_subtype = P2P_PAF_GON_REQ; 1620 /* increase dwell time to MED level */ 1621 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME); 1622 config_af_params->extra_listen = false; 1623 break; 1624 default: 1625 brcmf_err("Unknown p2p pub act frame subtype: %d\n", 1626 act_frm->subtype); 1627 err = -EINVAL; 1628 } 1629 return err; 1630 } 1631 1632 /** 1633 * brcmf_p2p_send_action_frame() - send action frame . 1634 * 1635 * @cfg: driver private data for cfg80211 interface. 1636 * @ndev: net device to transmit on. 1637 * @af_params: configuration data for action frame. 1638 */ 1639 bool brcmf_p2p_send_action_frame(struct brcmf_cfg80211_info *cfg, 1640 struct net_device *ndev, 1641 struct brcmf_fil_af_params_le *af_params) 1642 { 1643 struct brcmf_p2p_info *p2p = &cfg->p2p; 1644 struct brcmf_if *ifp = netdev_priv(ndev); 1645 struct brcmf_fil_action_frame_le *action_frame; 1646 struct brcmf_config_af_params config_af_params; 1647 struct afx_hdl *afx_hdl = &p2p->afx_hdl; 1648 u16 action_frame_len; 1649 bool ack = false; 1650 u8 category; 1651 u8 action; 1652 s32 tx_retry; 1653 s32 extra_listen_time; 1654 uint delta_ms; 1655 1656 action_frame = &af_params->action_frame; 1657 action_frame_len = le16_to_cpu(action_frame->len); 1658 1659 brcmf_p2p_print_actframe(true, action_frame->data, action_frame_len); 1660 1661 /* Add the default dwell time. Dwell time to stay off-channel */ 1662 /* to wait for a response action frame after transmitting an */ 1663 /* GO Negotiation action frame */ 1664 af_params->dwell_time = cpu_to_le32(P2P_AF_DWELL_TIME); 1665 1666 category = action_frame->data[DOT11_ACTION_CAT_OFF]; 1667 action = action_frame->data[DOT11_ACTION_ACT_OFF]; 1668 1669 /* initialize variables */ 1670 p2p->next_af_subtype = P2P_PAF_SUBTYPE_INVALID; 1671 p2p->gon_req_action = false; 1672 1673 /* config parameters */ 1674 config_af_params.mpc_onoff = -1; 1675 config_af_params.search_channel = false; 1676 config_af_params.extra_listen = false; 1677 1678 if (brcmf_p2p_is_pub_action(action_frame->data, action_frame_len)) { 1679 /* p2p public action frame process */ 1680 if (brcmf_p2p_pub_af_tx(cfg, af_params, &config_af_params)) { 1681 /* Just send unknown subtype frame with */ 1682 /* default parameters. */ 1683 brcmf_err("P2P Public action frame, unknown subtype.\n"); 1684 } 1685 } else if (brcmf_p2p_is_gas_action(action_frame->data, 1686 action_frame_len)) { 1687 /* service discovery process */ 1688 if (action == P2PSD_ACTION_ID_GAS_IREQ || 1689 action == P2PSD_ACTION_ID_GAS_CREQ) { 1690 /* configure service discovery query frame */ 1691 config_af_params.search_channel = true; 1692 1693 /* save next af suptype to cancel */ 1694 /* remaining dwell time */ 1695 p2p->next_af_subtype = action + 1; 1696 1697 af_params->dwell_time = 1698 cpu_to_le32(P2P_AF_MED_DWELL_TIME); 1699 } else if (action == P2PSD_ACTION_ID_GAS_IRESP || 1700 action == P2PSD_ACTION_ID_GAS_CRESP) { 1701 /* configure service discovery response frame */ 1702 af_params->dwell_time = 1703 cpu_to_le32(P2P_AF_MIN_DWELL_TIME); 1704 } else { 1705 brcmf_err("Unknown action type: %d\n", action); 1706 goto exit; 1707 } 1708 } else if (brcmf_p2p_is_p2p_action(action_frame->data, 1709 action_frame_len)) { 1710 /* do not configure anything. it will be */ 1711 /* sent with a default configuration */ 1712 } else { 1713 brcmf_err("Unknown Frame: category 0x%x, action 0x%x\n", 1714 category, action); 1715 return false; 1716 } 1717 1718 /* if connecting on primary iface, sleep for a while before sending 1719 * af tx for VSDB 1720 */ 1721 if (test_bit(BRCMF_VIF_STATUS_CONNECTING, 1722 &p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->sme_state)) 1723 msleep(50); 1724 1725 /* if scan is ongoing, abort current scan. */ 1726 if (test_bit(BRCMF_SCAN_STATUS_BUSY, &cfg->scan_status)) 1727 brcmf_abort_scanning(cfg); 1728 1729 memcpy(afx_hdl->tx_dst_addr, action_frame->da, ETH_ALEN); 1730 1731 /* To make sure to send successfully action frame, turn off mpc */ 1732 if (config_af_params.mpc_onoff == 0) 1733 brcmf_set_mpc(ifp, 0); 1734 1735 /* set status and destination address before sending af */ 1736 if (p2p->next_af_subtype != P2P_PAF_SUBTYPE_INVALID) { 1737 /* set status to cancel the remained dwell time in rx process */ 1738 set_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status); 1739 } 1740 1741 p2p->af_sent_channel = 0; 1742 set_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status); 1743 /* validate channel and p2p ies */ 1744 if (config_af_params.search_channel && 1745 IS_P2P_SOCIAL_CHANNEL(le32_to_cpu(af_params->channel)) && 1746 p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif->saved_ie.probe_req_ie_len) { 1747 afx_hdl = &p2p->afx_hdl; 1748 afx_hdl->peer_listen_chan = le32_to_cpu(af_params->channel); 1749 1750 if (brcmf_p2p_af_searching_channel(p2p) == 1751 P2P_INVALID_CHANNEL) { 1752 brcmf_err("Couldn't find peer's channel.\n"); 1753 goto exit; 1754 } 1755 1756 /* Abort scan even for VSDB scenarios. Scan gets aborted in 1757 * firmware but after the check of piggyback algorithm. To take 1758 * care of current piggback algo, lets abort the scan here 1759 * itself. 1760 */ 1761 brcmf_notify_escan_complete(cfg, ifp, true, true); 1762 1763 /* update channel */ 1764 af_params->channel = cpu_to_le32(afx_hdl->peer_chan); 1765 } 1766 1767 tx_retry = 0; 1768 while (!p2p->block_gon_req_tx && 1769 (ack == false) && (tx_retry < P2P_AF_TX_MAX_RETRY)) { 1770 ack = !brcmf_p2p_tx_action_frame(p2p, af_params); 1771 tx_retry++; 1772 } 1773 if (ack == false) { 1774 brcmf_err("Failed to send Action Frame(retry %d)\n", tx_retry); 1775 clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status); 1776 } 1777 1778 exit: 1779 clear_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status); 1780 1781 /* WAR: sometimes dongle does not keep the dwell time of 'actframe'. 1782 * if we coundn't get the next action response frame and dongle does 1783 * not keep the dwell time, go to listen state again to get next action 1784 * response frame. 1785 */ 1786 if (ack && config_af_params.extra_listen && !p2p->block_gon_req_tx && 1787 test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status) && 1788 p2p->af_sent_channel == afx_hdl->my_listen_chan) { 1789 delta_ms = jiffies_to_msecs(jiffies - p2p->af_tx_sent_jiffies); 1790 if (le32_to_cpu(af_params->dwell_time) > delta_ms) 1791 extra_listen_time = le32_to_cpu(af_params->dwell_time) - 1792 delta_ms; 1793 else 1794 extra_listen_time = 0; 1795 if (extra_listen_time > 50) { 1796 set_bit(BRCMF_P2P_STATUS_WAITING_NEXT_AF_LISTEN, 1797 &p2p->status); 1798 brcmf_dbg(INFO, "Wait more time! actual af time:%d, calculated extra listen:%d\n", 1799 le32_to_cpu(af_params->dwell_time), 1800 extra_listen_time); 1801 extra_listen_time += 100; 1802 if (!brcmf_p2p_discover_listen(p2p, 1803 p2p->af_sent_channel, 1804 extra_listen_time)) { 1805 unsigned long duration; 1806 1807 extra_listen_time += 100; 1808 duration = msecs_to_jiffies(extra_listen_time); 1809 wait_for_completion_timeout(&p2p->wait_next_af, 1810 duration); 1811 } 1812 clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_AF_LISTEN, 1813 &p2p->status); 1814 } 1815 } 1816 1817 if (p2p->block_gon_req_tx) { 1818 /* if ack is true, supplicant will wait more time(100ms). 1819 * so we will return it as a success to get more time . 1820 */ 1821 p2p->block_gon_req_tx = false; 1822 ack = true; 1823 } 1824 1825 clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status); 1826 /* if all done, turn mpc on again */ 1827 if (config_af_params.mpc_onoff == 1) 1828 brcmf_set_mpc(ifp, 1); 1829 1830 return ack; 1831 } 1832 1833 /** 1834 * brcmf_p2p_notify_rx_mgmt_p2p_probereq() - Event handler for p2p probe req. 1835 * 1836 * @ifp: interface pointer for which event was received. 1837 * @e: even message. 1838 * @data: payload of event message (probe request). 1839 */ 1840 s32 brcmf_p2p_notify_rx_mgmt_p2p_probereq(struct brcmf_if *ifp, 1841 const struct brcmf_event_msg *e, 1842 void *data) 1843 { 1844 struct brcmf_cfg80211_info *cfg = ifp->drvr->config; 1845 struct brcmf_p2p_info *p2p = &cfg->p2p; 1846 struct afx_hdl *afx_hdl = &p2p->afx_hdl; 1847 struct brcmf_cfg80211_vif *vif = ifp->vif; 1848 struct brcmf_rx_mgmt_data *rxframe = (struct brcmf_rx_mgmt_data *)data; 1849 struct brcmu_chan ch; 1850 u8 *mgmt_frame; 1851 u32 mgmt_frame_len; 1852 s32 freq; 1853 u16 mgmt_type; 1854 1855 brcmf_dbg(INFO, "Enter: event %d reason %d\n", e->event_code, 1856 e->reason); 1857 1858 if (e->datalen < sizeof(*rxframe)) { 1859 brcmf_dbg(SCAN, "Event data to small. Ignore\n"); 1860 return 0; 1861 } 1862 1863 ch.chspec = be16_to_cpu(rxframe->chanspec); 1864 cfg->d11inf.decchspec(&ch); 1865 1866 if (test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status) && 1867 (ether_addr_equal(afx_hdl->tx_dst_addr, e->addr))) { 1868 afx_hdl->peer_chan = ch.control_ch_num; 1869 brcmf_dbg(INFO, "PROBE REQUEST: Peer found, channel=%d\n", 1870 afx_hdl->peer_chan); 1871 complete(&afx_hdl->act_frm_scan); 1872 } 1873 1874 /* Firmware sends us two proberesponses for each idx one. At the */ 1875 /* moment anything but bsscfgidx 0 is passed up to supplicant */ 1876 if (e->bsscfgidx == 0) 1877 return 0; 1878 1879 /* Filter any P2P probe reqs arriving during the GO-NEG Phase */ 1880 if (test_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status)) { 1881 brcmf_dbg(INFO, "Filtering P2P probe_req in GO-NEG phase\n"); 1882 return 0; 1883 } 1884 1885 /* Check if wpa_supplicant has registered for this frame */ 1886 brcmf_dbg(INFO, "vif->mgmt_rx_reg %04x\n", vif->mgmt_rx_reg); 1887 mgmt_type = (IEEE80211_STYPE_PROBE_REQ & IEEE80211_FCTL_STYPE) >> 4; 1888 if ((vif->mgmt_rx_reg & BIT(mgmt_type)) == 0) 1889 return 0; 1890 1891 mgmt_frame = (u8 *)(rxframe + 1); 1892 mgmt_frame_len = e->datalen - sizeof(*rxframe); 1893 freq = ieee80211_channel_to_frequency(ch.control_ch_num, 1894 ch.band == BRCMU_CHAN_BAND_2G ? 1895 NL80211_BAND_2GHZ : 1896 NL80211_BAND_5GHZ); 1897 1898 cfg80211_rx_mgmt(&vif->wdev, freq, 0, mgmt_frame, mgmt_frame_len, 0); 1899 1900 brcmf_dbg(INFO, "mgmt_frame_len (%d) , e->datalen (%d), chanspec (%04x), freq (%d)\n", 1901 mgmt_frame_len, e->datalen, ch.chspec, freq); 1902 1903 return 0; 1904 } 1905 1906 1907 /** 1908 * brcmf_p2p_get_current_chanspec() - Get current operation channel. 1909 * 1910 * @p2p: P2P specific data. 1911 * @chanspec: chanspec to be returned. 1912 */ 1913 static void brcmf_p2p_get_current_chanspec(struct brcmf_p2p_info *p2p, 1914 u16 *chanspec) 1915 { 1916 struct brcmf_if *ifp; 1917 u8 mac_addr[ETH_ALEN]; 1918 struct brcmu_chan ch; 1919 struct brcmf_bss_info_le *bi; 1920 u8 *buf; 1921 1922 ifp = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->ifp; 1923 1924 if (brcmf_fil_cmd_data_get(ifp, BRCMF_C_GET_BSSID, mac_addr, 1925 ETH_ALEN) == 0) { 1926 buf = kzalloc(WL_BSS_INFO_MAX, GFP_KERNEL); 1927 if (buf != NULL) { 1928 *(__le32 *)buf = cpu_to_le32(WL_BSS_INFO_MAX); 1929 if (brcmf_fil_cmd_data_get(ifp, BRCMF_C_GET_BSS_INFO, 1930 buf, WL_BSS_INFO_MAX) == 0) { 1931 bi = (struct brcmf_bss_info_le *)(buf + 4); 1932 *chanspec = le16_to_cpu(bi->chanspec); 1933 kfree(buf); 1934 return; 1935 } 1936 kfree(buf); 1937 } 1938 } 1939 /* Use default channel for P2P */ 1940 ch.chnum = BRCMF_P2P_TEMP_CHAN; 1941 ch.bw = BRCMU_CHAN_BW_20; 1942 p2p->cfg->d11inf.encchspec(&ch); 1943 *chanspec = ch.chspec; 1944 } 1945 1946 /** 1947 * Change a P2P Role. 1948 * Parameters: 1949 * @mac: MAC address of the BSS to change a role 1950 * Returns 0 if success. 1951 */ 1952 int brcmf_p2p_ifchange(struct brcmf_cfg80211_info *cfg, 1953 enum brcmf_fil_p2p_if_types if_type) 1954 { 1955 struct brcmf_p2p_info *p2p = &cfg->p2p; 1956 struct brcmf_cfg80211_vif *vif; 1957 struct brcmf_fil_p2p_if_le if_request; 1958 s32 err; 1959 u16 chanspec; 1960 1961 brcmf_dbg(TRACE, "Enter\n"); 1962 1963 vif = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif; 1964 if (!vif) { 1965 brcmf_err("vif for P2PAPI_BSSCFG_PRIMARY does not exist\n"); 1966 return -EPERM; 1967 } 1968 brcmf_notify_escan_complete(cfg, vif->ifp, true, true); 1969 vif = p2p->bss_idx[P2PAPI_BSSCFG_CONNECTION].vif; 1970 if (!vif) { 1971 brcmf_err("vif for P2PAPI_BSSCFG_CONNECTION does not exist\n"); 1972 return -EPERM; 1973 } 1974 brcmf_set_mpc(vif->ifp, 0); 1975 1976 /* In concurrency case, STA may be already associated in a particular */ 1977 /* channel. so retrieve the current channel of primary interface and */ 1978 /* then start the virtual interface on that. */ 1979 brcmf_p2p_get_current_chanspec(p2p, &chanspec); 1980 1981 if_request.type = cpu_to_le16((u16)if_type); 1982 if_request.chspec = cpu_to_le16(chanspec); 1983 memcpy(if_request.addr, p2p->int_addr, sizeof(if_request.addr)); 1984 1985 brcmf_cfg80211_arm_vif_event(cfg, vif); 1986 err = brcmf_fil_iovar_data_set(vif->ifp, "p2p_ifupd", &if_request, 1987 sizeof(if_request)); 1988 if (err) { 1989 brcmf_err("p2p_ifupd FAILED, err=%d\n", err); 1990 brcmf_cfg80211_arm_vif_event(cfg, NULL); 1991 return err; 1992 } 1993 err = brcmf_cfg80211_wait_vif_event(cfg, BRCMF_E_IF_CHANGE, 1994 BRCMF_VIF_EVENT_TIMEOUT); 1995 brcmf_cfg80211_arm_vif_event(cfg, NULL); 1996 if (!err) { 1997 brcmf_err("No BRCMF_E_IF_CHANGE event received\n"); 1998 return -EIO; 1999 } 2000 2001 err = brcmf_fil_cmd_int_set(vif->ifp, BRCMF_C_SET_SCB_TIMEOUT, 2002 BRCMF_SCB_TIMEOUT_VALUE); 2003 2004 return err; 2005 } 2006 2007 static int brcmf_p2p_request_p2p_if(struct brcmf_p2p_info *p2p, 2008 struct brcmf_if *ifp, u8 ea[ETH_ALEN], 2009 enum brcmf_fil_p2p_if_types iftype) 2010 { 2011 struct brcmf_fil_p2p_if_le if_request; 2012 int err; 2013 u16 chanspec; 2014 2015 /* we need a default channel */ 2016 brcmf_p2p_get_current_chanspec(p2p, &chanspec); 2017 2018 /* fill the firmware request */ 2019 memcpy(if_request.addr, ea, ETH_ALEN); 2020 if_request.type = cpu_to_le16((u16)iftype); 2021 if_request.chspec = cpu_to_le16(chanspec); 2022 2023 err = brcmf_fil_iovar_data_set(ifp, "p2p_ifadd", &if_request, 2024 sizeof(if_request)); 2025 2026 return err; 2027 } 2028 2029 static int brcmf_p2p_disable_p2p_if(struct brcmf_cfg80211_vif *vif) 2030 { 2031 struct brcmf_cfg80211_info *cfg = wdev_to_cfg(&vif->wdev); 2032 struct net_device *pri_ndev = cfg_to_ndev(cfg); 2033 struct brcmf_if *ifp = netdev_priv(pri_ndev); 2034 u8 *addr = vif->wdev.netdev->dev_addr; 2035 2036 return brcmf_fil_iovar_data_set(ifp, "p2p_ifdis", addr, ETH_ALEN); 2037 } 2038 2039 static int brcmf_p2p_release_p2p_if(struct brcmf_cfg80211_vif *vif) 2040 { 2041 struct brcmf_cfg80211_info *cfg = wdev_to_cfg(&vif->wdev); 2042 struct net_device *pri_ndev = cfg_to_ndev(cfg); 2043 struct brcmf_if *ifp = netdev_priv(pri_ndev); 2044 u8 *addr = vif->wdev.netdev->dev_addr; 2045 2046 return brcmf_fil_iovar_data_set(ifp, "p2p_ifdel", addr, ETH_ALEN); 2047 } 2048 2049 /** 2050 * brcmf_p2p_create_p2pdev() - create a P2P_DEVICE virtual interface. 2051 * 2052 * @p2p: P2P specific data. 2053 * @wiphy: wiphy device of new interface. 2054 * @addr: mac address for this new interface. 2055 */ 2056 static struct wireless_dev *brcmf_p2p_create_p2pdev(struct brcmf_p2p_info *p2p, 2057 struct wiphy *wiphy, 2058 u8 *addr) 2059 { 2060 struct brcmf_cfg80211_vif *p2p_vif; 2061 struct brcmf_if *p2p_ifp; 2062 struct brcmf_if *pri_ifp; 2063 int err; 2064 u32 bsscfgidx; 2065 2066 if (p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif) 2067 return ERR_PTR(-ENOSPC); 2068 2069 p2p_vif = brcmf_alloc_vif(p2p->cfg, NL80211_IFTYPE_P2P_DEVICE); 2070 if (IS_ERR(p2p_vif)) { 2071 brcmf_err("could not create discovery vif\n"); 2072 return (struct wireless_dev *)p2p_vif; 2073 } 2074 2075 pri_ifp = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->ifp; 2076 2077 /* firmware requires unique mac address for p2pdev interface */ 2078 if (addr && ether_addr_equal(addr, pri_ifp->mac_addr)) { 2079 brcmf_err("discovery vif must be different from primary interface\n"); 2080 return ERR_PTR(-EINVAL); 2081 } 2082 2083 brcmf_p2p_generate_bss_mac(p2p, addr); 2084 brcmf_p2p_set_firmware(pri_ifp, p2p->dev_addr); 2085 2086 brcmf_cfg80211_arm_vif_event(p2p->cfg, p2p_vif); 2087 brcmf_fweh_p2pdev_setup(pri_ifp, true); 2088 2089 /* Initialize P2P Discovery in the firmware */ 2090 err = brcmf_fil_iovar_int_set(pri_ifp, "p2p_disc", 1); 2091 if (err < 0) { 2092 brcmf_err("set p2p_disc error\n"); 2093 brcmf_fweh_p2pdev_setup(pri_ifp, false); 2094 brcmf_cfg80211_arm_vif_event(p2p->cfg, NULL); 2095 goto fail; 2096 } 2097 2098 /* wait for firmware event */ 2099 err = brcmf_cfg80211_wait_vif_event(p2p->cfg, BRCMF_E_IF_ADD, 2100 BRCMF_VIF_EVENT_TIMEOUT); 2101 brcmf_cfg80211_arm_vif_event(p2p->cfg, NULL); 2102 brcmf_fweh_p2pdev_setup(pri_ifp, false); 2103 if (!err) { 2104 brcmf_err("timeout occurred\n"); 2105 err = -EIO; 2106 goto fail; 2107 } 2108 2109 /* discovery interface created */ 2110 p2p_ifp = p2p_vif->ifp; 2111 p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif = p2p_vif; 2112 memcpy(p2p_ifp->mac_addr, p2p->dev_addr, ETH_ALEN); 2113 memcpy(&p2p_vif->wdev.address, p2p->dev_addr, sizeof(p2p->dev_addr)); 2114 2115 /* verify bsscfg index for P2P discovery */ 2116 err = brcmf_fil_iovar_int_get(pri_ifp, "p2p_dev", &bsscfgidx); 2117 if (err < 0) { 2118 brcmf_err("retrieving discover bsscfg index failed\n"); 2119 goto fail; 2120 } 2121 2122 WARN_ON(p2p_ifp->bsscfgidx != bsscfgidx); 2123 2124 init_completion(&p2p->send_af_done); 2125 INIT_WORK(&p2p->afx_hdl.afx_work, brcmf_p2p_afx_handler); 2126 init_completion(&p2p->afx_hdl.act_frm_scan); 2127 init_completion(&p2p->wait_next_af); 2128 2129 return &p2p_vif->wdev; 2130 2131 fail: 2132 brcmf_free_vif(p2p_vif); 2133 return ERR_PTR(err); 2134 } 2135 2136 /** 2137 * brcmf_p2p_add_vif() - create a new P2P virtual interface. 2138 * 2139 * @wiphy: wiphy device of new interface. 2140 * @name: name of the new interface. 2141 * @name_assign_type: origin of the interface name 2142 * @type: nl80211 interface type. 2143 * @params: contains mac address for P2P device. 2144 */ 2145 struct wireless_dev *brcmf_p2p_add_vif(struct wiphy *wiphy, const char *name, 2146 unsigned char name_assign_type, 2147 enum nl80211_iftype type, 2148 struct vif_params *params) 2149 { 2150 struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy); 2151 struct brcmf_if *ifp = netdev_priv(cfg_to_ndev(cfg)); 2152 struct brcmf_cfg80211_vif *vif; 2153 enum brcmf_fil_p2p_if_types iftype; 2154 int err; 2155 2156 if (brcmf_cfg80211_vif_event_armed(cfg)) 2157 return ERR_PTR(-EBUSY); 2158 2159 brcmf_dbg(INFO, "adding vif \"%s\" (type=%d)\n", name, type); 2160 2161 switch (type) { 2162 case NL80211_IFTYPE_P2P_CLIENT: 2163 iftype = BRCMF_FIL_P2P_IF_CLIENT; 2164 break; 2165 case NL80211_IFTYPE_P2P_GO: 2166 iftype = BRCMF_FIL_P2P_IF_GO; 2167 break; 2168 case NL80211_IFTYPE_P2P_DEVICE: 2169 return brcmf_p2p_create_p2pdev(&cfg->p2p, wiphy, 2170 params->macaddr); 2171 default: 2172 return ERR_PTR(-EOPNOTSUPP); 2173 } 2174 2175 vif = brcmf_alloc_vif(cfg, type); 2176 if (IS_ERR(vif)) 2177 return (struct wireless_dev *)vif; 2178 brcmf_cfg80211_arm_vif_event(cfg, vif); 2179 2180 err = brcmf_p2p_request_p2p_if(&cfg->p2p, ifp, cfg->p2p.int_addr, 2181 iftype); 2182 if (err) { 2183 brcmf_cfg80211_arm_vif_event(cfg, NULL); 2184 goto fail; 2185 } 2186 2187 /* wait for firmware event */ 2188 err = brcmf_cfg80211_wait_vif_event(cfg, BRCMF_E_IF_ADD, 2189 BRCMF_VIF_EVENT_TIMEOUT); 2190 brcmf_cfg80211_arm_vif_event(cfg, NULL); 2191 if (!err) { 2192 brcmf_err("timeout occurred\n"); 2193 err = -EIO; 2194 goto fail; 2195 } 2196 2197 /* interface created in firmware */ 2198 ifp = vif->ifp; 2199 if (!ifp) { 2200 brcmf_err("no if pointer provided\n"); 2201 err = -ENOENT; 2202 goto fail; 2203 } 2204 2205 strncpy(ifp->ndev->name, name, sizeof(ifp->ndev->name) - 1); 2206 ifp->ndev->name_assign_type = name_assign_type; 2207 err = brcmf_net_attach(ifp, true); 2208 if (err) { 2209 brcmf_err("Registering netdevice failed\n"); 2210 free_netdev(ifp->ndev); 2211 goto fail; 2212 } 2213 2214 cfg->p2p.bss_idx[P2PAPI_BSSCFG_CONNECTION].vif = vif; 2215 /* Disable firmware roaming for P2P interface */ 2216 brcmf_fil_iovar_int_set(ifp, "roam_off", 1); 2217 if (iftype == BRCMF_FIL_P2P_IF_GO) { 2218 /* set station timeout for p2p */ 2219 brcmf_fil_cmd_int_set(ifp, BRCMF_C_SET_SCB_TIMEOUT, 2220 BRCMF_SCB_TIMEOUT_VALUE); 2221 } 2222 return &ifp->vif->wdev; 2223 2224 fail: 2225 brcmf_free_vif(vif); 2226 return ERR_PTR(err); 2227 } 2228 2229 /** 2230 * brcmf_p2p_del_vif() - delete a P2P virtual interface. 2231 * 2232 * @wiphy: wiphy device of interface. 2233 * @wdev: wireless device of interface. 2234 */ 2235 int brcmf_p2p_del_vif(struct wiphy *wiphy, struct wireless_dev *wdev) 2236 { 2237 struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy); 2238 struct brcmf_p2p_info *p2p = &cfg->p2p; 2239 struct brcmf_cfg80211_vif *vif; 2240 enum nl80211_iftype iftype; 2241 bool wait_for_disable = false; 2242 int err; 2243 2244 brcmf_dbg(TRACE, "delete P2P vif\n"); 2245 vif = container_of(wdev, struct brcmf_cfg80211_vif, wdev); 2246 2247 iftype = vif->wdev.iftype; 2248 brcmf_cfg80211_arm_vif_event(cfg, vif); 2249 switch (iftype) { 2250 case NL80211_IFTYPE_P2P_CLIENT: 2251 if (test_bit(BRCMF_VIF_STATUS_DISCONNECTING, &vif->sme_state)) 2252 wait_for_disable = true; 2253 break; 2254 2255 case NL80211_IFTYPE_P2P_GO: 2256 if (!brcmf_p2p_disable_p2p_if(vif)) 2257 wait_for_disable = true; 2258 break; 2259 2260 case NL80211_IFTYPE_P2P_DEVICE: 2261 if (!p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif) 2262 return 0; 2263 brcmf_p2p_cancel_remain_on_channel(vif->ifp); 2264 brcmf_p2p_deinit_discovery(p2p); 2265 break; 2266 2267 default: 2268 return -ENOTSUPP; 2269 } 2270 2271 clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status); 2272 brcmf_dbg(INFO, "P2P: GO_NEG_PHASE status cleared\n"); 2273 2274 if (wait_for_disable) 2275 wait_for_completion_timeout(&cfg->vif_disabled, 2276 BRCMF_P2P_DISABLE_TIMEOUT); 2277 2278 err = 0; 2279 if (iftype != NL80211_IFTYPE_P2P_DEVICE) { 2280 brcmf_vif_clear_mgmt_ies(vif); 2281 err = brcmf_p2p_release_p2p_if(vif); 2282 } 2283 if (!err) { 2284 /* wait for firmware event */ 2285 err = brcmf_cfg80211_wait_vif_event(cfg, BRCMF_E_IF_DEL, 2286 BRCMF_VIF_EVENT_TIMEOUT); 2287 if (!err) 2288 err = -EIO; 2289 else 2290 err = 0; 2291 } 2292 brcmf_remove_interface(vif->ifp, true); 2293 2294 brcmf_cfg80211_arm_vif_event(cfg, NULL); 2295 if (iftype != NL80211_IFTYPE_P2P_DEVICE) 2296 p2p->bss_idx[P2PAPI_BSSCFG_CONNECTION].vif = NULL; 2297 2298 return err; 2299 } 2300 2301 void brcmf_p2p_ifp_removed(struct brcmf_if *ifp, bool rtnl_locked) 2302 { 2303 struct brcmf_cfg80211_info *cfg; 2304 struct brcmf_cfg80211_vif *vif; 2305 2306 brcmf_dbg(INFO, "P2P: device interface removed\n"); 2307 vif = ifp->vif; 2308 cfg = wdev_to_cfg(&vif->wdev); 2309 cfg->p2p.bss_idx[P2PAPI_BSSCFG_DEVICE].vif = NULL; 2310 if (!rtnl_locked) 2311 rtnl_lock(); 2312 cfg80211_unregister_wdev(&vif->wdev); 2313 if (!rtnl_locked) 2314 rtnl_unlock(); 2315 brcmf_free_vif(vif); 2316 } 2317 2318 int brcmf_p2p_start_device(struct wiphy *wiphy, struct wireless_dev *wdev) 2319 { 2320 struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy); 2321 struct brcmf_p2p_info *p2p = &cfg->p2p; 2322 struct brcmf_cfg80211_vif *vif; 2323 int err; 2324 2325 vif = container_of(wdev, struct brcmf_cfg80211_vif, wdev); 2326 mutex_lock(&cfg->usr_sync); 2327 err = brcmf_p2p_enable_discovery(p2p); 2328 if (!err) 2329 set_bit(BRCMF_VIF_STATUS_READY, &vif->sme_state); 2330 mutex_unlock(&cfg->usr_sync); 2331 return err; 2332 } 2333 2334 void brcmf_p2p_stop_device(struct wiphy *wiphy, struct wireless_dev *wdev) 2335 { 2336 struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy); 2337 struct brcmf_p2p_info *p2p = &cfg->p2p; 2338 struct brcmf_cfg80211_vif *vif; 2339 2340 vif = container_of(wdev, struct brcmf_cfg80211_vif, wdev); 2341 /* This call can be result of the unregister_wdev call. In that case 2342 * we dont want to do anything anymore. Just return. The config vif 2343 * will have been cleared at this point. 2344 */ 2345 if (p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif == vif) { 2346 mutex_lock(&cfg->usr_sync); 2347 /* Set the discovery state to SCAN */ 2348 (void)brcmf_p2p_set_discover_state(vif->ifp, 2349 WL_P2P_DISC_ST_SCAN, 0, 0); 2350 brcmf_abort_scanning(cfg); 2351 clear_bit(BRCMF_VIF_STATUS_READY, &vif->sme_state); 2352 mutex_unlock(&cfg->usr_sync); 2353 } 2354 } 2355 2356 /** 2357 * brcmf_p2p_attach() - attach for P2P. 2358 * 2359 * @cfg: driver private data for cfg80211 interface. 2360 * @p2pdev_forced: create p2p device interface at attach. 2361 */ 2362 s32 brcmf_p2p_attach(struct brcmf_cfg80211_info *cfg, bool p2pdev_forced) 2363 { 2364 struct brcmf_p2p_info *p2p; 2365 struct brcmf_if *pri_ifp; 2366 s32 err = 0; 2367 void *err_ptr; 2368 2369 p2p = &cfg->p2p; 2370 p2p->cfg = cfg; 2371 2372 pri_ifp = brcmf_get_ifp(cfg->pub, 0); 2373 p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif = pri_ifp->vif; 2374 2375 if (p2pdev_forced) { 2376 err_ptr = brcmf_p2p_create_p2pdev(p2p, NULL, NULL); 2377 if (IS_ERR(err_ptr)) { 2378 brcmf_err("P2P device creation failed.\n"); 2379 err = PTR_ERR(err_ptr); 2380 } 2381 } else { 2382 p2p->p2pdev_dynamically = true; 2383 } 2384 return err; 2385 } 2386 2387 /** 2388 * brcmf_p2p_detach() - detach P2P. 2389 * 2390 * @p2p: P2P specific data. 2391 */ 2392 void brcmf_p2p_detach(struct brcmf_p2p_info *p2p) 2393 { 2394 struct brcmf_cfg80211_vif *vif; 2395 2396 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif; 2397 if (vif != NULL) { 2398 brcmf_p2p_cancel_remain_on_channel(vif->ifp); 2399 brcmf_p2p_deinit_discovery(p2p); 2400 brcmf_remove_interface(vif->ifp, false); 2401 } 2402 /* just set it all to zero */ 2403 memset(p2p, 0, sizeof(*p2p)); 2404 } 2405 2406