1 /* 2 * Copyright (c) 2012 Broadcom Corporation 3 * 4 * Permission to use, copy, modify, and/or distribute this software for any 5 * purpose with or without fee is hereby granted, provided that the above 6 * copyright notice and this permission notice appear in all copies. 7 * 8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY 11 * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION 13 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN 14 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 15 */ 16 #include <linux/slab.h> 17 #include <linux/netdevice.h> 18 #include <linux/etherdevice.h> 19 #include <linux/rtnetlink.h> 20 #include <net/cfg80211.h> 21 22 #include <brcmu_wifi.h> 23 #include <brcmu_utils.h> 24 #include <defs.h> 25 #include "core.h" 26 #include "debug.h" 27 #include "fwil.h" 28 #include "fwil_types.h" 29 #include "p2p.h" 30 #include "cfg80211.h" 31 32 /* parameters used for p2p escan */ 33 #define P2PAPI_SCAN_NPROBES 1 34 #define P2PAPI_SCAN_DWELL_TIME_MS 80 35 #define P2PAPI_SCAN_SOCIAL_DWELL_TIME_MS 40 36 #define P2PAPI_SCAN_HOME_TIME_MS 60 37 #define P2PAPI_SCAN_NPROBS_TIME_MS 30 38 #define P2PAPI_SCAN_AF_SEARCH_DWELL_TIME_MS 100 39 #define WL_SCAN_CONNECT_DWELL_TIME_MS 200 40 #define WL_SCAN_JOIN_PROBE_INTERVAL_MS 20 41 42 #define BRCMF_P2P_WILDCARD_SSID "DIRECT-" 43 #define BRCMF_P2P_WILDCARD_SSID_LEN (sizeof(BRCMF_P2P_WILDCARD_SSID) - 1) 44 45 #define SOCIAL_CHAN_1 1 46 #define SOCIAL_CHAN_2 6 47 #define SOCIAL_CHAN_3 11 48 #define IS_P2P_SOCIAL_CHANNEL(channel) ((channel == SOCIAL_CHAN_1) || \ 49 (channel == SOCIAL_CHAN_2) || \ 50 (channel == SOCIAL_CHAN_3)) 51 #define BRCMF_P2P_TEMP_CHAN SOCIAL_CHAN_3 52 #define SOCIAL_CHAN_CNT 3 53 #define AF_PEER_SEARCH_CNT 2 54 55 #define BRCMF_SCB_TIMEOUT_VALUE 20 56 57 #define P2P_VER 9 /* P2P version: 9=WiFi P2P v1.0 */ 58 #define P2P_PUB_AF_CATEGORY 0x04 59 #define P2P_PUB_AF_ACTION 0x09 60 #define P2P_AF_CATEGORY 0x7f 61 #define P2P_OUI "\x50\x6F\x9A" /* P2P OUI */ 62 #define P2P_OUI_LEN 3 /* P2P OUI length */ 63 64 /* Action Frame Constants */ 65 #define DOT11_ACTION_HDR_LEN 2 /* action frame category + action */ 66 #define DOT11_ACTION_CAT_OFF 0 /* category offset */ 67 #define DOT11_ACTION_ACT_OFF 1 /* action offset */ 68 69 #define P2P_AF_DWELL_TIME 200 70 #define P2P_AF_MIN_DWELL_TIME 100 71 #define P2P_AF_MED_DWELL_TIME 400 72 #define P2P_AF_LONG_DWELL_TIME 1000 73 #define P2P_AF_TX_MAX_RETRY 1 74 #define P2P_AF_MAX_WAIT_TIME msecs_to_jiffies(2000) 75 #define P2P_INVALID_CHANNEL -1 76 #define P2P_CHANNEL_SYNC_RETRY 5 77 #define P2P_AF_FRM_SCAN_MAX_WAIT msecs_to_jiffies(450) 78 #define P2P_DEFAULT_SLEEP_TIME_VSDB 200 79 80 /* WiFi P2P Public Action Frame OUI Subtypes */ 81 #define P2P_PAF_GON_REQ 0 /* Group Owner Negotiation Req */ 82 #define P2P_PAF_GON_RSP 1 /* Group Owner Negotiation Rsp */ 83 #define P2P_PAF_GON_CONF 2 /* Group Owner Negotiation Confirm */ 84 #define P2P_PAF_INVITE_REQ 3 /* P2P Invitation Request */ 85 #define P2P_PAF_INVITE_RSP 4 /* P2P Invitation Response */ 86 #define P2P_PAF_DEVDIS_REQ 5 /* Device Discoverability Request */ 87 #define P2P_PAF_DEVDIS_RSP 6 /* Device Discoverability Response */ 88 #define P2P_PAF_PROVDIS_REQ 7 /* Provision Discovery Request */ 89 #define P2P_PAF_PROVDIS_RSP 8 /* Provision Discovery Response */ 90 #define P2P_PAF_SUBTYPE_INVALID 255 /* Invalid Subtype */ 91 92 /* WiFi P2P Action Frame OUI Subtypes */ 93 #define P2P_AF_NOTICE_OF_ABSENCE 0 /* Notice of Absence */ 94 #define P2P_AF_PRESENCE_REQ 1 /* P2P Presence Request */ 95 #define P2P_AF_PRESENCE_RSP 2 /* P2P Presence Response */ 96 #define P2P_AF_GO_DISC_REQ 3 /* GO Discoverability Request */ 97 98 /* P2P Service Discovery related */ 99 #define P2PSD_ACTION_CATEGORY 0x04 /* Public action frame */ 100 #define P2PSD_ACTION_ID_GAS_IREQ 0x0a /* GAS Initial Request AF */ 101 #define P2PSD_ACTION_ID_GAS_IRESP 0x0b /* GAS Initial Response AF */ 102 #define P2PSD_ACTION_ID_GAS_CREQ 0x0c /* GAS Comback Request AF */ 103 #define P2PSD_ACTION_ID_GAS_CRESP 0x0d /* GAS Comback Response AF */ 104 105 #define BRCMF_P2P_DISABLE_TIMEOUT msecs_to_jiffies(500) 106 /** 107 * struct brcmf_p2p_disc_st_le - set discovery state in firmware. 108 * 109 * @state: requested discovery state (see enum brcmf_p2p_disc_state). 110 * @chspec: channel parameter for %WL_P2P_DISC_ST_LISTEN state. 111 * @dwell: dwell time in ms for %WL_P2P_DISC_ST_LISTEN state. 112 */ 113 struct brcmf_p2p_disc_st_le { 114 u8 state; 115 __le16 chspec; 116 __le16 dwell; 117 }; 118 119 /** 120 * enum brcmf_p2p_disc_state - P2P discovery state values 121 * 122 * @WL_P2P_DISC_ST_SCAN: P2P discovery with wildcard SSID and P2P IE. 123 * @WL_P2P_DISC_ST_LISTEN: P2P discovery off-channel for specified time. 124 * @WL_P2P_DISC_ST_SEARCH: P2P discovery with P2P wildcard SSID and P2P IE. 125 */ 126 enum brcmf_p2p_disc_state { 127 WL_P2P_DISC_ST_SCAN, 128 WL_P2P_DISC_ST_LISTEN, 129 WL_P2P_DISC_ST_SEARCH 130 }; 131 132 /** 133 * struct brcmf_p2p_scan_le - P2P specific scan request. 134 * 135 * @type: type of scan method requested (values: 'E' or 'S'). 136 * @reserved: reserved (ignored). 137 * @eparams: parameters used for type 'E'. 138 * @sparams: parameters used for type 'S'. 139 */ 140 struct brcmf_p2p_scan_le { 141 u8 type; 142 u8 reserved[3]; 143 union { 144 struct brcmf_escan_params_le eparams; 145 struct brcmf_scan_params_le sparams; 146 }; 147 }; 148 149 /** 150 * struct brcmf_p2p_pub_act_frame - WiFi P2P Public Action Frame 151 * 152 * @category: P2P_PUB_AF_CATEGORY 153 * @action: P2P_PUB_AF_ACTION 154 * @oui[3]: P2P_OUI 155 * @oui_type: OUI type - P2P_VER 156 * @subtype: OUI subtype - P2P_TYPE_* 157 * @dialog_token: nonzero, identifies req/rsp transaction 158 * @elts[1]: Variable length information elements. 159 */ 160 struct brcmf_p2p_pub_act_frame { 161 u8 category; 162 u8 action; 163 u8 oui[3]; 164 u8 oui_type; 165 u8 subtype; 166 u8 dialog_token; 167 u8 elts[1]; 168 }; 169 170 /** 171 * struct brcmf_p2p_action_frame - WiFi P2P Action Frame 172 * 173 * @category: P2P_AF_CATEGORY 174 * @OUI[3]: OUI - P2P_OUI 175 * @type: OUI Type - P2P_VER 176 * @subtype: OUI Subtype - P2P_AF_* 177 * @dialog_token: nonzero, identifies req/resp tranaction 178 * @elts[1]: Variable length information elements. 179 */ 180 struct brcmf_p2p_action_frame { 181 u8 category; 182 u8 oui[3]; 183 u8 type; 184 u8 subtype; 185 u8 dialog_token; 186 u8 elts[1]; 187 }; 188 189 /** 190 * struct brcmf_p2psd_gas_pub_act_frame - Wi-Fi GAS Public Action Frame 191 * 192 * @category: 0x04 Public Action Frame 193 * @action: 0x6c Advertisement Protocol 194 * @dialog_token: nonzero, identifies req/rsp transaction 195 * @query_data[1]: Query Data. SD gas ireq SD gas iresp 196 */ 197 struct brcmf_p2psd_gas_pub_act_frame { 198 u8 category; 199 u8 action; 200 u8 dialog_token; 201 u8 query_data[1]; 202 }; 203 204 /** 205 * struct brcmf_config_af_params - Action Frame Parameters for tx. 206 * 207 * @mpc_onoff: To make sure to send successfully action frame, we have to 208 * turn off mpc 0: off, 1: on, (-1): do nothing 209 * @search_channel: 1: search peer's channel to send af 210 * extra_listen: keep the dwell time to get af response frame. 211 */ 212 struct brcmf_config_af_params { 213 s32 mpc_onoff; 214 bool search_channel; 215 bool extra_listen; 216 }; 217 218 /** 219 * brcmf_p2p_is_pub_action() - true if p2p public type frame. 220 * 221 * @frame: action frame data. 222 * @frame_len: length of action frame data. 223 * 224 * Determine if action frame is p2p public action type 225 */ 226 static bool brcmf_p2p_is_pub_action(void *frame, u32 frame_len) 227 { 228 struct brcmf_p2p_pub_act_frame *pact_frm; 229 230 if (frame == NULL) 231 return false; 232 233 pact_frm = (struct brcmf_p2p_pub_act_frame *)frame; 234 if (frame_len < sizeof(struct brcmf_p2p_pub_act_frame) - 1) 235 return false; 236 237 if (pact_frm->category == P2P_PUB_AF_CATEGORY && 238 pact_frm->action == P2P_PUB_AF_ACTION && 239 pact_frm->oui_type == P2P_VER && 240 memcmp(pact_frm->oui, P2P_OUI, P2P_OUI_LEN) == 0) 241 return true; 242 243 return false; 244 } 245 246 /** 247 * brcmf_p2p_is_p2p_action() - true if p2p action type frame. 248 * 249 * @frame: action frame data. 250 * @frame_len: length of action frame data. 251 * 252 * Determine if action frame is p2p action type 253 */ 254 static bool brcmf_p2p_is_p2p_action(void *frame, u32 frame_len) 255 { 256 struct brcmf_p2p_action_frame *act_frm; 257 258 if (frame == NULL) 259 return false; 260 261 act_frm = (struct brcmf_p2p_action_frame *)frame; 262 if (frame_len < sizeof(struct brcmf_p2p_action_frame) - 1) 263 return false; 264 265 if (act_frm->category == P2P_AF_CATEGORY && 266 act_frm->type == P2P_VER && 267 memcmp(act_frm->oui, P2P_OUI, P2P_OUI_LEN) == 0) 268 return true; 269 270 return false; 271 } 272 273 /** 274 * brcmf_p2p_is_gas_action() - true if p2p gas action type frame. 275 * 276 * @frame: action frame data. 277 * @frame_len: length of action frame data. 278 * 279 * Determine if action frame is p2p gas action type 280 */ 281 static bool brcmf_p2p_is_gas_action(void *frame, u32 frame_len) 282 { 283 struct brcmf_p2psd_gas_pub_act_frame *sd_act_frm; 284 285 if (frame == NULL) 286 return false; 287 288 sd_act_frm = (struct brcmf_p2psd_gas_pub_act_frame *)frame; 289 if (frame_len < sizeof(struct brcmf_p2psd_gas_pub_act_frame) - 1) 290 return false; 291 292 if (sd_act_frm->category != P2PSD_ACTION_CATEGORY) 293 return false; 294 295 if (sd_act_frm->action == P2PSD_ACTION_ID_GAS_IREQ || 296 sd_act_frm->action == P2PSD_ACTION_ID_GAS_IRESP || 297 sd_act_frm->action == P2PSD_ACTION_ID_GAS_CREQ || 298 sd_act_frm->action == P2PSD_ACTION_ID_GAS_CRESP) 299 return true; 300 301 return false; 302 } 303 304 /** 305 * brcmf_p2p_print_actframe() - debug print routine. 306 * 307 * @tx: Received or to be transmitted 308 * @frame: action frame data. 309 * @frame_len: length of action frame data. 310 * 311 * Print information about the p2p action frame 312 */ 313 314 #ifdef DEBUG 315 316 static void brcmf_p2p_print_actframe(bool tx, void *frame, u32 frame_len) 317 { 318 struct brcmf_p2p_pub_act_frame *pact_frm; 319 struct brcmf_p2p_action_frame *act_frm; 320 struct brcmf_p2psd_gas_pub_act_frame *sd_act_frm; 321 322 if (!frame || frame_len <= 2) 323 return; 324 325 if (brcmf_p2p_is_pub_action(frame, frame_len)) { 326 pact_frm = (struct brcmf_p2p_pub_act_frame *)frame; 327 switch (pact_frm->subtype) { 328 case P2P_PAF_GON_REQ: 329 brcmf_dbg(TRACE, "%s P2P Group Owner Negotiation Req Frame\n", 330 (tx) ? "TX" : "RX"); 331 break; 332 case P2P_PAF_GON_RSP: 333 brcmf_dbg(TRACE, "%s P2P Group Owner Negotiation Rsp Frame\n", 334 (tx) ? "TX" : "RX"); 335 break; 336 case P2P_PAF_GON_CONF: 337 brcmf_dbg(TRACE, "%s P2P Group Owner Negotiation Confirm Frame\n", 338 (tx) ? "TX" : "RX"); 339 break; 340 case P2P_PAF_INVITE_REQ: 341 brcmf_dbg(TRACE, "%s P2P Invitation Request Frame\n", 342 (tx) ? "TX" : "RX"); 343 break; 344 case P2P_PAF_INVITE_RSP: 345 brcmf_dbg(TRACE, "%s P2P Invitation Response Frame\n", 346 (tx) ? "TX" : "RX"); 347 break; 348 case P2P_PAF_DEVDIS_REQ: 349 brcmf_dbg(TRACE, "%s P2P Device Discoverability Request Frame\n", 350 (tx) ? "TX" : "RX"); 351 break; 352 case P2P_PAF_DEVDIS_RSP: 353 brcmf_dbg(TRACE, "%s P2P Device Discoverability Response Frame\n", 354 (tx) ? "TX" : "RX"); 355 break; 356 case P2P_PAF_PROVDIS_REQ: 357 brcmf_dbg(TRACE, "%s P2P Provision Discovery Request Frame\n", 358 (tx) ? "TX" : "RX"); 359 break; 360 case P2P_PAF_PROVDIS_RSP: 361 brcmf_dbg(TRACE, "%s P2P Provision Discovery Response Frame\n", 362 (tx) ? "TX" : "RX"); 363 break; 364 default: 365 brcmf_dbg(TRACE, "%s Unknown P2P Public Action Frame\n", 366 (tx) ? "TX" : "RX"); 367 break; 368 } 369 } else if (brcmf_p2p_is_p2p_action(frame, frame_len)) { 370 act_frm = (struct brcmf_p2p_action_frame *)frame; 371 switch (act_frm->subtype) { 372 case P2P_AF_NOTICE_OF_ABSENCE: 373 brcmf_dbg(TRACE, "%s P2P Notice of Absence Frame\n", 374 (tx) ? "TX" : "RX"); 375 break; 376 case P2P_AF_PRESENCE_REQ: 377 brcmf_dbg(TRACE, "%s P2P Presence Request Frame\n", 378 (tx) ? "TX" : "RX"); 379 break; 380 case P2P_AF_PRESENCE_RSP: 381 brcmf_dbg(TRACE, "%s P2P Presence Response Frame\n", 382 (tx) ? "TX" : "RX"); 383 break; 384 case P2P_AF_GO_DISC_REQ: 385 brcmf_dbg(TRACE, "%s P2P Discoverability Request Frame\n", 386 (tx) ? "TX" : "RX"); 387 break; 388 default: 389 brcmf_dbg(TRACE, "%s Unknown P2P Action Frame\n", 390 (tx) ? "TX" : "RX"); 391 } 392 393 } else if (brcmf_p2p_is_gas_action(frame, frame_len)) { 394 sd_act_frm = (struct brcmf_p2psd_gas_pub_act_frame *)frame; 395 switch (sd_act_frm->action) { 396 case P2PSD_ACTION_ID_GAS_IREQ: 397 brcmf_dbg(TRACE, "%s P2P GAS Initial Request\n", 398 (tx) ? "TX" : "RX"); 399 break; 400 case P2PSD_ACTION_ID_GAS_IRESP: 401 brcmf_dbg(TRACE, "%s P2P GAS Initial Response\n", 402 (tx) ? "TX" : "RX"); 403 break; 404 case P2PSD_ACTION_ID_GAS_CREQ: 405 brcmf_dbg(TRACE, "%s P2P GAS Comback Request\n", 406 (tx) ? "TX" : "RX"); 407 break; 408 case P2PSD_ACTION_ID_GAS_CRESP: 409 brcmf_dbg(TRACE, "%s P2P GAS Comback Response\n", 410 (tx) ? "TX" : "RX"); 411 break; 412 default: 413 brcmf_dbg(TRACE, "%s Unknown P2P GAS Frame\n", 414 (tx) ? "TX" : "RX"); 415 break; 416 } 417 } 418 } 419 420 #else 421 422 static void brcmf_p2p_print_actframe(bool tx, void *frame, u32 frame_len) 423 { 424 } 425 426 #endif 427 428 429 /** 430 * brcmf_p2p_set_firmware() - prepare firmware for peer-to-peer operation. 431 * 432 * @ifp: ifp to use for iovars (primary). 433 * @p2p_mac: mac address to configure for p2p_da_override 434 */ 435 static int brcmf_p2p_set_firmware(struct brcmf_if *ifp, u8 *p2p_mac) 436 { 437 s32 ret = 0; 438 439 brcmf_fil_cmd_int_set(ifp, BRCMF_C_DOWN, 1); 440 brcmf_fil_iovar_int_set(ifp, "apsta", 1); 441 brcmf_fil_cmd_int_set(ifp, BRCMF_C_UP, 1); 442 443 /* In case of COB type, firmware has default mac address 444 * After Initializing firmware, we have to set current mac address to 445 * firmware for P2P device address. This must be done with discovery 446 * disabled. 447 */ 448 brcmf_fil_iovar_int_set(ifp, "p2p_disc", 0); 449 450 ret = brcmf_fil_iovar_data_set(ifp, "p2p_da_override", p2p_mac, 451 ETH_ALEN); 452 if (ret) 453 brcmf_err("failed to update device address ret %d\n", ret); 454 455 return ret; 456 } 457 458 /** 459 * brcmf_p2p_generate_bss_mac() - derive mac addresses for P2P. 460 * 461 * @p2p: P2P specific data. 462 * @dev_addr: optional device address. 463 * 464 * P2P needs mac addresses for P2P device and interface. If no device 465 * address it specified, these are derived from a random ethernet 466 * address. 467 */ 468 static void brcmf_p2p_generate_bss_mac(struct brcmf_p2p_info *p2p, u8 *dev_addr) 469 { 470 bool random_addr = false; 471 472 if (!dev_addr || is_zero_ether_addr(dev_addr)) 473 random_addr = true; 474 475 /* Generate the P2P Device Address obtaining a random ethernet 476 * address with the locally administered bit set. 477 */ 478 if (random_addr) 479 eth_random_addr(p2p->dev_addr); 480 else 481 memcpy(p2p->dev_addr, dev_addr, ETH_ALEN); 482 483 /* Generate the P2P Interface Address. If the discovery and connection 484 * BSSCFGs need to simultaneously co-exist, then this address must be 485 * different from the P2P Device Address, but also locally administered. 486 */ 487 memcpy(p2p->int_addr, p2p->dev_addr, ETH_ALEN); 488 p2p->int_addr[0] |= 0x02; 489 p2p->int_addr[4] ^= 0x80; 490 } 491 492 /** 493 * brcmf_p2p_scan_is_p2p_request() - is cfg80211 scan request a P2P scan. 494 * 495 * @request: the scan request as received from cfg80211. 496 * 497 * returns true if one of the ssids in the request matches the 498 * P2P wildcard ssid; otherwise returns false. 499 */ 500 static bool brcmf_p2p_scan_is_p2p_request(struct cfg80211_scan_request *request) 501 { 502 struct cfg80211_ssid *ssids = request->ssids; 503 int i; 504 505 for (i = 0; i < request->n_ssids; i++) { 506 if (ssids[i].ssid_len != BRCMF_P2P_WILDCARD_SSID_LEN) 507 continue; 508 509 brcmf_dbg(INFO, "comparing ssid \"%s\"", ssids[i].ssid); 510 if (!memcmp(BRCMF_P2P_WILDCARD_SSID, ssids[i].ssid, 511 BRCMF_P2P_WILDCARD_SSID_LEN)) 512 return true; 513 } 514 return false; 515 } 516 517 /** 518 * brcmf_p2p_set_discover_state - set discover state in firmware. 519 * 520 * @ifp: low-level interface object. 521 * @state: discover state to set. 522 * @chanspec: channel parameters (for state @WL_P2P_DISC_ST_LISTEN only). 523 * @listen_ms: duration to listen (for state @WL_P2P_DISC_ST_LISTEN only). 524 */ 525 static s32 brcmf_p2p_set_discover_state(struct brcmf_if *ifp, u8 state, 526 u16 chanspec, u16 listen_ms) 527 { 528 struct brcmf_p2p_disc_st_le discover_state; 529 s32 ret = 0; 530 brcmf_dbg(TRACE, "enter\n"); 531 532 discover_state.state = state; 533 discover_state.chspec = cpu_to_le16(chanspec); 534 discover_state.dwell = cpu_to_le16(listen_ms); 535 ret = brcmf_fil_bsscfg_data_set(ifp, "p2p_state", &discover_state, 536 sizeof(discover_state)); 537 return ret; 538 } 539 540 /** 541 * brcmf_p2p_deinit_discovery() - disable P2P device discovery. 542 * 543 * @p2p: P2P specific data. 544 * 545 * Resets the discovery state and disables it in firmware. 546 */ 547 static s32 brcmf_p2p_deinit_discovery(struct brcmf_p2p_info *p2p) 548 { 549 struct brcmf_cfg80211_vif *vif; 550 551 brcmf_dbg(TRACE, "enter\n"); 552 553 /* Set the discovery state to SCAN */ 554 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif; 555 (void)brcmf_p2p_set_discover_state(vif->ifp, WL_P2P_DISC_ST_SCAN, 0, 0); 556 557 /* Disable P2P discovery in the firmware */ 558 vif = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif; 559 (void)brcmf_fil_iovar_int_set(vif->ifp, "p2p_disc", 0); 560 561 return 0; 562 } 563 564 /** 565 * brcmf_p2p_enable_discovery() - initialize and configure discovery. 566 * 567 * @p2p: P2P specific data. 568 * 569 * Initializes the discovery device and configure the virtual interface. 570 */ 571 static int brcmf_p2p_enable_discovery(struct brcmf_p2p_info *p2p) 572 { 573 struct brcmf_cfg80211_vif *vif; 574 s32 ret = 0; 575 576 brcmf_dbg(TRACE, "enter\n"); 577 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif; 578 if (!vif) { 579 brcmf_err("P2P config device not available\n"); 580 ret = -EPERM; 581 goto exit; 582 } 583 584 if (test_bit(BRCMF_P2P_STATUS_ENABLED, &p2p->status)) { 585 brcmf_dbg(INFO, "P2P config device already configured\n"); 586 goto exit; 587 } 588 589 /* Re-initialize P2P Discovery in the firmware */ 590 vif = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif; 591 ret = brcmf_fil_iovar_int_set(vif->ifp, "p2p_disc", 1); 592 if (ret < 0) { 593 brcmf_err("set p2p_disc error\n"); 594 goto exit; 595 } 596 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif; 597 ret = brcmf_p2p_set_discover_state(vif->ifp, WL_P2P_DISC_ST_SCAN, 0, 0); 598 if (ret < 0) { 599 brcmf_err("unable to set WL_P2P_DISC_ST_SCAN\n"); 600 goto exit; 601 } 602 603 /* 604 * Set wsec to any non-zero value in the discovery bsscfg 605 * to ensure our P2P probe responses have the privacy bit 606 * set in the 802.11 WPA IE. Some peer devices may not 607 * initiate WPS with us if this bit is not set. 608 */ 609 ret = brcmf_fil_bsscfg_int_set(vif->ifp, "wsec", AES_ENABLED); 610 if (ret < 0) { 611 brcmf_err("wsec error %d\n", ret); 612 goto exit; 613 } 614 615 set_bit(BRCMF_P2P_STATUS_ENABLED, &p2p->status); 616 exit: 617 return ret; 618 } 619 620 /** 621 * brcmf_p2p_escan() - initiate a P2P scan. 622 * 623 * @p2p: P2P specific data. 624 * @num_chans: number of channels to scan. 625 * @chanspecs: channel parameters for @num_chans channels. 626 * @search_state: P2P discover state to use. 627 * @bss_type: type of P2P bss. 628 */ 629 static s32 brcmf_p2p_escan(struct brcmf_p2p_info *p2p, u32 num_chans, 630 u16 chanspecs[], s32 search_state, 631 enum p2p_bss_type bss_type) 632 { 633 s32 ret = 0; 634 s32 memsize = offsetof(struct brcmf_p2p_scan_le, 635 eparams.params_le.channel_list); 636 s32 nprobes; 637 s32 active; 638 u32 i; 639 u8 *memblk; 640 struct brcmf_cfg80211_vif *vif; 641 struct brcmf_p2p_scan_le *p2p_params; 642 struct brcmf_scan_params_le *sparams; 643 644 memsize += num_chans * sizeof(__le16); 645 memblk = kzalloc(memsize, GFP_KERNEL); 646 if (!memblk) 647 return -ENOMEM; 648 649 vif = p2p->bss_idx[bss_type].vif; 650 if (vif == NULL) { 651 brcmf_err("no vif for bss type %d\n", bss_type); 652 ret = -EINVAL; 653 goto exit; 654 } 655 p2p_params = (struct brcmf_p2p_scan_le *)memblk; 656 sparams = &p2p_params->eparams.params_le; 657 658 switch (search_state) { 659 case WL_P2P_DISC_ST_SEARCH: 660 /* 661 * If we in SEARCH STATE, we don't need to set SSID explictly 662 * because dongle use P2P WILDCARD internally by default, use 663 * null ssid, which it is already due to kzalloc. 664 */ 665 break; 666 case WL_P2P_DISC_ST_SCAN: 667 /* 668 * wpa_supplicant has p2p_find command with type social or 669 * progressive. For progressive, we need to set the ssid to 670 * P2P WILDCARD because we just do broadcast scan unless 671 * setting SSID. 672 */ 673 sparams->ssid_le.SSID_len = 674 cpu_to_le32(BRCMF_P2P_WILDCARD_SSID_LEN); 675 memcpy(sparams->ssid_le.SSID, BRCMF_P2P_WILDCARD_SSID, 676 BRCMF_P2P_WILDCARD_SSID_LEN); 677 break; 678 default: 679 brcmf_err(" invalid search state %d\n", search_state); 680 ret = -EINVAL; 681 goto exit; 682 } 683 684 brcmf_p2p_set_discover_state(vif->ifp, search_state, 0, 0); 685 686 /* 687 * set p2p scan parameters. 688 */ 689 p2p_params->type = 'E'; 690 691 /* determine the scan engine parameters */ 692 sparams->bss_type = DOT11_BSSTYPE_ANY; 693 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 s32 retry; 1138 1139 brcmf_dbg(TRACE, "Enter\n"); 1140 1141 pri_vif = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif; 1142 1143 reinit_completion(&afx_hdl->act_frm_scan); 1144 set_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status); 1145 afx_hdl->is_active = true; 1146 afx_hdl->peer_chan = P2P_INVALID_CHANNEL; 1147 1148 /* Loop to wait until we find a peer's channel or the 1149 * pending action frame tx is cancelled. 1150 */ 1151 retry = 0; 1152 while ((retry < P2P_CHANNEL_SYNC_RETRY) && 1153 (afx_hdl->peer_chan == P2P_INVALID_CHANNEL)) { 1154 afx_hdl->is_listen = false; 1155 brcmf_dbg(TRACE, "Scheduling action frame for sending.. (%d)\n", 1156 retry); 1157 /* search peer on peer's listen channel */ 1158 schedule_work(&afx_hdl->afx_work); 1159 wait_for_completion_timeout(&afx_hdl->act_frm_scan, 1160 P2P_AF_FRM_SCAN_MAX_WAIT); 1161 if ((afx_hdl->peer_chan != P2P_INVALID_CHANNEL) || 1162 (!test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, 1163 &p2p->status))) 1164 break; 1165 1166 if (afx_hdl->my_listen_chan) { 1167 brcmf_dbg(TRACE, "Scheduling listen peer, channel=%d\n", 1168 afx_hdl->my_listen_chan); 1169 /* listen on my listen channel */ 1170 afx_hdl->is_listen = true; 1171 schedule_work(&afx_hdl->afx_work); 1172 wait_for_completion_timeout(&afx_hdl->act_frm_scan, 1173 P2P_AF_FRM_SCAN_MAX_WAIT); 1174 } 1175 if ((afx_hdl->peer_chan != P2P_INVALID_CHANNEL) || 1176 (!test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, 1177 &p2p->status))) 1178 break; 1179 retry++; 1180 1181 /* if sta is connected or connecting, sleep for a while before 1182 * retry af tx or finding a peer 1183 */ 1184 if (test_bit(BRCMF_VIF_STATUS_CONNECTED, &pri_vif->sme_state) || 1185 test_bit(BRCMF_VIF_STATUS_CONNECTING, &pri_vif->sme_state)) 1186 msleep(P2P_DEFAULT_SLEEP_TIME_VSDB); 1187 } 1188 1189 brcmf_dbg(TRACE, "Completed search/listen peer_chan=%d\n", 1190 afx_hdl->peer_chan); 1191 afx_hdl->is_active = false; 1192 1193 clear_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status); 1194 1195 return afx_hdl->peer_chan; 1196 } 1197 1198 1199 /** 1200 * brcmf_p2p_scan_finding_common_channel() - was escan used for finding channel 1201 * 1202 * @cfg: common configuration struct. 1203 * @bi: bss info struct, result from scan. 1204 * 1205 */ 1206 bool brcmf_p2p_scan_finding_common_channel(struct brcmf_cfg80211_info *cfg, 1207 struct brcmf_bss_info_le *bi) 1208 1209 { 1210 struct brcmf_p2p_info *p2p = &cfg->p2p; 1211 struct afx_hdl *afx_hdl = &p2p->afx_hdl; 1212 struct brcmu_chan ch; 1213 u8 *ie; 1214 s32 err; 1215 u8 p2p_dev_addr[ETH_ALEN]; 1216 1217 if (!test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status)) 1218 return false; 1219 1220 if (bi == NULL) { 1221 brcmf_dbg(TRACE, "ACTION FRAME SCAN Done\n"); 1222 if (afx_hdl->peer_chan == P2P_INVALID_CHANNEL) 1223 complete(&afx_hdl->act_frm_scan); 1224 return true; 1225 } 1226 1227 ie = ((u8 *)bi) + le16_to_cpu(bi->ie_offset); 1228 memset(p2p_dev_addr, 0, sizeof(p2p_dev_addr)); 1229 err = cfg80211_get_p2p_attr(ie, le32_to_cpu(bi->ie_length), 1230 IEEE80211_P2P_ATTR_DEVICE_INFO, 1231 p2p_dev_addr, sizeof(p2p_dev_addr)); 1232 if (err < 0) 1233 err = cfg80211_get_p2p_attr(ie, le32_to_cpu(bi->ie_length), 1234 IEEE80211_P2P_ATTR_DEVICE_ID, 1235 p2p_dev_addr, sizeof(p2p_dev_addr)); 1236 if ((err >= 0) && 1237 (ether_addr_equal(p2p_dev_addr, afx_hdl->tx_dst_addr))) { 1238 if (!bi->ctl_ch) { 1239 ch.chspec = le16_to_cpu(bi->chanspec); 1240 cfg->d11inf.decchspec(&ch); 1241 bi->ctl_ch = ch.control_ch_num; 1242 } 1243 afx_hdl->peer_chan = bi->ctl_ch; 1244 brcmf_dbg(TRACE, "ACTION FRAME SCAN : Peer %pM found, channel : %d\n", 1245 afx_hdl->tx_dst_addr, afx_hdl->peer_chan); 1246 complete(&afx_hdl->act_frm_scan); 1247 } 1248 return true; 1249 } 1250 1251 /** 1252 * brcmf_p2p_stop_wait_next_action_frame() - finish scan if af tx complete. 1253 * 1254 * @cfg: common configuration struct. 1255 * 1256 */ 1257 static void 1258 brcmf_p2p_stop_wait_next_action_frame(struct brcmf_cfg80211_info *cfg) 1259 { 1260 struct brcmf_p2p_info *p2p = &cfg->p2p; 1261 struct brcmf_if *ifp = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->ifp; 1262 1263 if (test_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status) && 1264 (test_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status) || 1265 test_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status))) { 1266 brcmf_dbg(TRACE, "*** Wake UP ** abort actframe iovar\n"); 1267 /* if channel is not zero, "actfame" uses off channel scan. 1268 * So abort scan for off channel completion. 1269 */ 1270 if (p2p->af_sent_channel) 1271 brcmf_notify_escan_complete(cfg, ifp, true, true); 1272 } else if (test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_AF_LISTEN, 1273 &p2p->status)) { 1274 brcmf_dbg(TRACE, "*** Wake UP ** abort listen for next af frame\n"); 1275 /* So abort scan to cancel listen */ 1276 brcmf_notify_escan_complete(cfg, ifp, true, true); 1277 } 1278 } 1279 1280 1281 /** 1282 * brcmf_p2p_gon_req_collision() - Check if go negotiaton collission 1283 * 1284 * @p2p: p2p device info struct. 1285 * 1286 * return true if recevied action frame is to be dropped. 1287 */ 1288 static bool 1289 brcmf_p2p_gon_req_collision(struct brcmf_p2p_info *p2p, u8 *mac) 1290 { 1291 struct brcmf_cfg80211_info *cfg = p2p->cfg; 1292 struct brcmf_if *ifp; 1293 1294 brcmf_dbg(TRACE, "Enter\n"); 1295 1296 if (!test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status) || 1297 !p2p->gon_req_action) 1298 return false; 1299 1300 brcmf_dbg(TRACE, "GO Negotiation Request COLLISION !!!\n"); 1301 /* if sa(peer) addr is less than da(my) addr, then this device 1302 * process peer's gon request and block to send gon req. 1303 * if not (sa addr > da addr), 1304 * this device will process gon request and drop gon req of peer. 1305 */ 1306 ifp = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif->ifp; 1307 if (memcmp(mac, ifp->mac_addr, ETH_ALEN) < 0) { 1308 brcmf_dbg(INFO, "Block transmit gon req !!!\n"); 1309 p2p->block_gon_req_tx = true; 1310 /* if we are finding a common channel for sending af, 1311 * do not scan more to block to send current gon req 1312 */ 1313 if (test_and_clear_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, 1314 &p2p->status)) 1315 complete(&p2p->afx_hdl.act_frm_scan); 1316 if (test_and_clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, 1317 &p2p->status)) 1318 brcmf_p2p_stop_wait_next_action_frame(cfg); 1319 return false; 1320 } 1321 1322 /* drop gon request of peer to process gon request by this device. */ 1323 brcmf_dbg(INFO, "Drop received gon req !!!\n"); 1324 1325 return true; 1326 } 1327 1328 1329 /** 1330 * brcmf_p2p_notify_action_frame_rx() - received action frame. 1331 * 1332 * @ifp: interfac control. 1333 * @e: event message. Not used, to make it usable for fweh event dispatcher. 1334 * @data: payload of message, containing action frame data. 1335 * 1336 */ 1337 int brcmf_p2p_notify_action_frame_rx(struct brcmf_if *ifp, 1338 const struct brcmf_event_msg *e, 1339 void *data) 1340 { 1341 struct brcmf_cfg80211_info *cfg = ifp->drvr->config; 1342 struct brcmf_p2p_info *p2p = &cfg->p2p; 1343 struct afx_hdl *afx_hdl = &p2p->afx_hdl; 1344 struct wireless_dev *wdev; 1345 u32 mgmt_frame_len = e->datalen - sizeof(struct brcmf_rx_mgmt_data); 1346 struct brcmf_rx_mgmt_data *rxframe = (struct brcmf_rx_mgmt_data *)data; 1347 u8 *frame = (u8 *)(rxframe + 1); 1348 struct brcmf_p2p_pub_act_frame *act_frm; 1349 struct brcmf_p2psd_gas_pub_act_frame *sd_act_frm; 1350 struct brcmu_chan ch; 1351 struct ieee80211_mgmt *mgmt_frame; 1352 s32 freq; 1353 u16 mgmt_type; 1354 u8 action; 1355 1356 if (e->datalen < sizeof(*rxframe)) { 1357 brcmf_dbg(SCAN, "Event data to small. Ignore\n"); 1358 return 0; 1359 } 1360 1361 ch.chspec = be16_to_cpu(rxframe->chanspec); 1362 cfg->d11inf.decchspec(&ch); 1363 /* Check if wpa_supplicant has registered for this frame */ 1364 brcmf_dbg(INFO, "ifp->vif->mgmt_rx_reg %04x\n", ifp->vif->mgmt_rx_reg); 1365 mgmt_type = (IEEE80211_STYPE_ACTION & IEEE80211_FCTL_STYPE) >> 4; 1366 if ((ifp->vif->mgmt_rx_reg & BIT(mgmt_type)) == 0) 1367 return 0; 1368 1369 brcmf_p2p_print_actframe(false, frame, mgmt_frame_len); 1370 1371 action = P2P_PAF_SUBTYPE_INVALID; 1372 if (brcmf_p2p_is_pub_action(frame, mgmt_frame_len)) { 1373 act_frm = (struct brcmf_p2p_pub_act_frame *)frame; 1374 action = act_frm->subtype; 1375 if ((action == P2P_PAF_GON_REQ) && 1376 (brcmf_p2p_gon_req_collision(p2p, (u8 *)e->addr))) { 1377 if (test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, 1378 &p2p->status) && 1379 (ether_addr_equal(afx_hdl->tx_dst_addr, e->addr))) { 1380 afx_hdl->peer_chan = ch.control_ch_num; 1381 brcmf_dbg(INFO, "GON request: Peer found, channel=%d\n", 1382 afx_hdl->peer_chan); 1383 complete(&afx_hdl->act_frm_scan); 1384 } 1385 return 0; 1386 } 1387 /* After complete GO Negotiation, roll back to mpc mode */ 1388 if ((action == P2P_PAF_GON_CONF) || 1389 (action == P2P_PAF_PROVDIS_RSP)) 1390 brcmf_set_mpc(ifp, 1); 1391 if (action == P2P_PAF_GON_CONF) { 1392 brcmf_dbg(TRACE, "P2P: GO_NEG_PHASE status cleared\n"); 1393 clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status); 1394 } 1395 } else if (brcmf_p2p_is_gas_action(frame, mgmt_frame_len)) { 1396 sd_act_frm = (struct brcmf_p2psd_gas_pub_act_frame *)frame; 1397 action = sd_act_frm->action; 1398 } 1399 1400 if (test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status) && 1401 (p2p->next_af_subtype == action)) { 1402 brcmf_dbg(TRACE, "We got a right next frame! (%d)\n", action); 1403 clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, 1404 &p2p->status); 1405 /* Stop waiting for next AF. */ 1406 brcmf_p2p_stop_wait_next_action_frame(cfg); 1407 } 1408 1409 mgmt_frame = kzalloc(offsetof(struct ieee80211_mgmt, u) + 1410 mgmt_frame_len, GFP_KERNEL); 1411 if (!mgmt_frame) { 1412 brcmf_err("No memory available for action frame\n"); 1413 return -ENOMEM; 1414 } 1415 memcpy(mgmt_frame->da, ifp->mac_addr, ETH_ALEN); 1416 brcmf_fil_cmd_data_get(ifp, BRCMF_C_GET_BSSID, mgmt_frame->bssid, 1417 ETH_ALEN); 1418 memcpy(mgmt_frame->sa, e->addr, ETH_ALEN); 1419 mgmt_frame->frame_control = cpu_to_le16(IEEE80211_STYPE_ACTION); 1420 memcpy(&mgmt_frame->u, frame, mgmt_frame_len); 1421 mgmt_frame_len += offsetof(struct ieee80211_mgmt, u); 1422 1423 freq = ieee80211_channel_to_frequency(ch.control_ch_num, 1424 ch.band == BRCMU_CHAN_BAND_2G ? 1425 NL80211_BAND_2GHZ : 1426 NL80211_BAND_5GHZ); 1427 1428 wdev = &ifp->vif->wdev; 1429 cfg80211_rx_mgmt(wdev, freq, 0, (u8 *)mgmt_frame, mgmt_frame_len, 0); 1430 1431 kfree(mgmt_frame); 1432 return 0; 1433 } 1434 1435 1436 /** 1437 * brcmf_p2p_notify_action_tx_complete() - transmit action frame complete 1438 * 1439 * @ifp: interfac control. 1440 * @e: event message. Not used, to make it usable for fweh event dispatcher. 1441 * @data: not used. 1442 * 1443 */ 1444 int brcmf_p2p_notify_action_tx_complete(struct brcmf_if *ifp, 1445 const struct brcmf_event_msg *e, 1446 void *data) 1447 { 1448 struct brcmf_cfg80211_info *cfg = ifp->drvr->config; 1449 struct brcmf_p2p_info *p2p = &cfg->p2p; 1450 1451 brcmf_dbg(INFO, "Enter: event %s, status=%d\n", 1452 e->event_code == BRCMF_E_ACTION_FRAME_OFF_CHAN_COMPLETE ? 1453 "ACTION_FRAME_OFF_CHAN_COMPLETE" : "ACTION_FRAME_COMPLETE", 1454 e->status); 1455 1456 if (!test_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status)) 1457 return 0; 1458 1459 if (e->event_code == BRCMF_E_ACTION_FRAME_COMPLETE) { 1460 if (e->status == BRCMF_E_STATUS_SUCCESS) { 1461 set_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, 1462 &p2p->status); 1463 if (!p2p->wait_for_offchan_complete) 1464 complete(&p2p->send_af_done); 1465 } else { 1466 set_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status); 1467 /* If there is no ack, we don't need to wait for 1468 * WLC_E_ACTION_FRAME_OFFCHAN_COMPLETE event 1469 */ 1470 brcmf_p2p_stop_wait_next_action_frame(cfg); 1471 } 1472 1473 } else { 1474 complete(&p2p->send_af_done); 1475 } 1476 return 0; 1477 } 1478 1479 1480 /** 1481 * brcmf_p2p_tx_action_frame() - send action frame over fil. 1482 * 1483 * @p2p: p2p info struct for vif. 1484 * @af_params: action frame data/info. 1485 * 1486 * Send an action frame immediately without doing channel synchronization. 1487 * 1488 * This function waits for a completion event before returning. 1489 * The WLC_E_ACTION_FRAME_COMPLETE event will be received when the action 1490 * frame is transmitted. 1491 */ 1492 static s32 brcmf_p2p_tx_action_frame(struct brcmf_p2p_info *p2p, 1493 struct brcmf_fil_af_params_le *af_params) 1494 { 1495 struct brcmf_cfg80211_vif *vif; 1496 s32 err = 0; 1497 s32 timeout = 0; 1498 1499 brcmf_dbg(TRACE, "Enter\n"); 1500 1501 reinit_completion(&p2p->send_af_done); 1502 clear_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status); 1503 clear_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status); 1504 1505 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif; 1506 err = brcmf_fil_bsscfg_data_set(vif->ifp, "actframe", af_params, 1507 sizeof(*af_params)); 1508 if (err) { 1509 brcmf_err(" sending action frame has failed\n"); 1510 goto exit; 1511 } 1512 1513 p2p->af_sent_channel = le32_to_cpu(af_params->channel); 1514 p2p->af_tx_sent_jiffies = jiffies; 1515 1516 if (test_bit(BRCMF_P2P_STATUS_DISCOVER_LISTEN, &p2p->status) && 1517 p2p->af_sent_channel == 1518 ieee80211_frequency_to_channel(p2p->remain_on_channel.center_freq)) 1519 p2p->wait_for_offchan_complete = false; 1520 else 1521 p2p->wait_for_offchan_complete = true; 1522 1523 brcmf_dbg(TRACE, "Waiting for %s tx completion event\n", 1524 (p2p->wait_for_offchan_complete) ? 1525 "off-channel" : "on-channel"); 1526 1527 timeout = wait_for_completion_timeout(&p2p->send_af_done, 1528 P2P_AF_MAX_WAIT_TIME); 1529 1530 if (test_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status)) { 1531 brcmf_dbg(TRACE, "TX action frame operation is success\n"); 1532 } else { 1533 err = -EIO; 1534 brcmf_dbg(TRACE, "TX action frame operation has failed\n"); 1535 } 1536 /* clear status bit for action tx */ 1537 clear_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status); 1538 clear_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status); 1539 1540 exit: 1541 return err; 1542 } 1543 1544 1545 /** 1546 * brcmf_p2p_pub_af_tx() - public action frame tx routine. 1547 * 1548 * @cfg: driver private data for cfg80211 interface. 1549 * @af_params: action frame data/info. 1550 * @config_af_params: configuration data for action frame. 1551 * 1552 * routine which transmits ation frame public type. 1553 */ 1554 static s32 brcmf_p2p_pub_af_tx(struct brcmf_cfg80211_info *cfg, 1555 struct brcmf_fil_af_params_le *af_params, 1556 struct brcmf_config_af_params *config_af_params) 1557 { 1558 struct brcmf_p2p_info *p2p = &cfg->p2p; 1559 struct brcmf_fil_action_frame_le *action_frame; 1560 struct brcmf_p2p_pub_act_frame *act_frm; 1561 s32 err = 0; 1562 u16 ie_len; 1563 1564 action_frame = &af_params->action_frame; 1565 act_frm = (struct brcmf_p2p_pub_act_frame *)(action_frame->data); 1566 1567 config_af_params->extra_listen = true; 1568 1569 switch (act_frm->subtype) { 1570 case P2P_PAF_GON_REQ: 1571 brcmf_dbg(TRACE, "P2P: GO_NEG_PHASE status set\n"); 1572 set_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status); 1573 config_af_params->mpc_onoff = 0; 1574 config_af_params->search_channel = true; 1575 p2p->next_af_subtype = act_frm->subtype + 1; 1576 p2p->gon_req_action = true; 1577 /* increase dwell time to wait for RESP frame */ 1578 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME); 1579 break; 1580 case P2P_PAF_GON_RSP: 1581 p2p->next_af_subtype = act_frm->subtype + 1; 1582 /* increase dwell time to wait for CONF frame */ 1583 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME); 1584 break; 1585 case P2P_PAF_GON_CONF: 1586 /* If we reached till GO Neg confirmation reset the filter */ 1587 brcmf_dbg(TRACE, "P2P: GO_NEG_PHASE status cleared\n"); 1588 clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status); 1589 /* turn on mpc again if go nego is done */ 1590 config_af_params->mpc_onoff = 1; 1591 /* minimize dwell time */ 1592 af_params->dwell_time = cpu_to_le32(P2P_AF_MIN_DWELL_TIME); 1593 config_af_params->extra_listen = false; 1594 break; 1595 case P2P_PAF_INVITE_REQ: 1596 config_af_params->search_channel = true; 1597 p2p->next_af_subtype = act_frm->subtype + 1; 1598 /* increase dwell time */ 1599 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME); 1600 break; 1601 case P2P_PAF_INVITE_RSP: 1602 /* minimize dwell time */ 1603 af_params->dwell_time = cpu_to_le32(P2P_AF_MIN_DWELL_TIME); 1604 config_af_params->extra_listen = false; 1605 break; 1606 case P2P_PAF_DEVDIS_REQ: 1607 config_af_params->search_channel = true; 1608 p2p->next_af_subtype = act_frm->subtype + 1; 1609 /* maximize dwell time to wait for RESP frame */ 1610 af_params->dwell_time = cpu_to_le32(P2P_AF_LONG_DWELL_TIME); 1611 break; 1612 case P2P_PAF_DEVDIS_RSP: 1613 /* minimize dwell time */ 1614 af_params->dwell_time = cpu_to_le32(P2P_AF_MIN_DWELL_TIME); 1615 config_af_params->extra_listen = false; 1616 break; 1617 case P2P_PAF_PROVDIS_REQ: 1618 ie_len = le16_to_cpu(action_frame->len) - 1619 offsetof(struct brcmf_p2p_pub_act_frame, elts); 1620 if (cfg80211_get_p2p_attr(&act_frm->elts[0], ie_len, 1621 IEEE80211_P2P_ATTR_GROUP_ID, 1622 NULL, 0) < 0) 1623 config_af_params->search_channel = true; 1624 config_af_params->mpc_onoff = 0; 1625 p2p->next_af_subtype = act_frm->subtype + 1; 1626 /* increase dwell time to wait for RESP frame */ 1627 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME); 1628 break; 1629 case P2P_PAF_PROVDIS_RSP: 1630 /* wpa_supplicant send go nego req right after prov disc */ 1631 p2p->next_af_subtype = P2P_PAF_GON_REQ; 1632 /* increase dwell time to MED level */ 1633 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME); 1634 config_af_params->extra_listen = false; 1635 break; 1636 default: 1637 brcmf_err("Unknown p2p pub act frame subtype: %d\n", 1638 act_frm->subtype); 1639 err = -EINVAL; 1640 } 1641 return err; 1642 } 1643 1644 /** 1645 * brcmf_p2p_send_action_frame() - send action frame . 1646 * 1647 * @cfg: driver private data for cfg80211 interface. 1648 * @ndev: net device to transmit on. 1649 * @af_params: configuration data for action frame. 1650 */ 1651 bool brcmf_p2p_send_action_frame(struct brcmf_cfg80211_info *cfg, 1652 struct net_device *ndev, 1653 struct brcmf_fil_af_params_le *af_params) 1654 { 1655 struct brcmf_p2p_info *p2p = &cfg->p2p; 1656 struct brcmf_if *ifp = netdev_priv(ndev); 1657 struct brcmf_fil_action_frame_le *action_frame; 1658 struct brcmf_config_af_params config_af_params; 1659 struct afx_hdl *afx_hdl = &p2p->afx_hdl; 1660 u16 action_frame_len; 1661 bool ack = false; 1662 u8 category; 1663 u8 action; 1664 s32 tx_retry; 1665 s32 extra_listen_time; 1666 uint delta_ms; 1667 1668 action_frame = &af_params->action_frame; 1669 action_frame_len = le16_to_cpu(action_frame->len); 1670 1671 brcmf_p2p_print_actframe(true, action_frame->data, action_frame_len); 1672 1673 /* Add the default dwell time. Dwell time to stay off-channel */ 1674 /* to wait for a response action frame after transmitting an */ 1675 /* GO Negotiation action frame */ 1676 af_params->dwell_time = cpu_to_le32(P2P_AF_DWELL_TIME); 1677 1678 category = action_frame->data[DOT11_ACTION_CAT_OFF]; 1679 action = action_frame->data[DOT11_ACTION_ACT_OFF]; 1680 1681 /* initialize variables */ 1682 p2p->next_af_subtype = P2P_PAF_SUBTYPE_INVALID; 1683 p2p->gon_req_action = false; 1684 1685 /* config parameters */ 1686 config_af_params.mpc_onoff = -1; 1687 config_af_params.search_channel = false; 1688 config_af_params.extra_listen = false; 1689 1690 if (brcmf_p2p_is_pub_action(action_frame->data, action_frame_len)) { 1691 /* p2p public action frame process */ 1692 if (brcmf_p2p_pub_af_tx(cfg, af_params, &config_af_params)) { 1693 /* Just send unknown subtype frame with */ 1694 /* default parameters. */ 1695 brcmf_err("P2P Public action frame, unknown subtype.\n"); 1696 } 1697 } else if (brcmf_p2p_is_gas_action(action_frame->data, 1698 action_frame_len)) { 1699 /* service discovery process */ 1700 if (action == P2PSD_ACTION_ID_GAS_IREQ || 1701 action == P2PSD_ACTION_ID_GAS_CREQ) { 1702 /* configure service discovery query frame */ 1703 config_af_params.search_channel = true; 1704 1705 /* save next af suptype to cancel */ 1706 /* remaining dwell time */ 1707 p2p->next_af_subtype = action + 1; 1708 1709 af_params->dwell_time = 1710 cpu_to_le32(P2P_AF_MED_DWELL_TIME); 1711 } else if (action == P2PSD_ACTION_ID_GAS_IRESP || 1712 action == P2PSD_ACTION_ID_GAS_CRESP) { 1713 /* configure service discovery response frame */ 1714 af_params->dwell_time = 1715 cpu_to_le32(P2P_AF_MIN_DWELL_TIME); 1716 } else { 1717 brcmf_err("Unknown action type: %d\n", action); 1718 goto exit; 1719 } 1720 } else if (brcmf_p2p_is_p2p_action(action_frame->data, 1721 action_frame_len)) { 1722 /* do not configure anything. it will be */ 1723 /* sent with a default configuration */ 1724 } else { 1725 brcmf_err("Unknown Frame: category 0x%x, action 0x%x\n", 1726 category, action); 1727 return false; 1728 } 1729 1730 /* if connecting on primary iface, sleep for a while before sending 1731 * af tx for VSDB 1732 */ 1733 if (test_bit(BRCMF_VIF_STATUS_CONNECTING, 1734 &p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->sme_state)) 1735 msleep(50); 1736 1737 /* if scan is ongoing, abort current scan. */ 1738 if (test_bit(BRCMF_SCAN_STATUS_BUSY, &cfg->scan_status)) 1739 brcmf_abort_scanning(cfg); 1740 1741 memcpy(afx_hdl->tx_dst_addr, action_frame->da, ETH_ALEN); 1742 1743 /* To make sure to send successfully action frame, turn off mpc */ 1744 if (config_af_params.mpc_onoff == 0) 1745 brcmf_set_mpc(ifp, 0); 1746 1747 /* set status and destination address before sending af */ 1748 if (p2p->next_af_subtype != P2P_PAF_SUBTYPE_INVALID) { 1749 /* set status to cancel the remained dwell time in rx process */ 1750 set_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status); 1751 } 1752 1753 p2p->af_sent_channel = 0; 1754 set_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status); 1755 /* validate channel and p2p ies */ 1756 if (config_af_params.search_channel && 1757 IS_P2P_SOCIAL_CHANNEL(le32_to_cpu(af_params->channel)) && 1758 p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif->saved_ie.probe_req_ie_len) { 1759 afx_hdl = &p2p->afx_hdl; 1760 afx_hdl->peer_listen_chan = le32_to_cpu(af_params->channel); 1761 1762 if (brcmf_p2p_af_searching_channel(p2p) == 1763 P2P_INVALID_CHANNEL) { 1764 brcmf_err("Couldn't find peer's channel.\n"); 1765 goto exit; 1766 } 1767 1768 /* Abort scan even for VSDB scenarios. Scan gets aborted in 1769 * firmware but after the check of piggyback algorithm. To take 1770 * care of current piggback algo, lets abort the scan here 1771 * itself. 1772 */ 1773 brcmf_notify_escan_complete(cfg, ifp, true, true); 1774 1775 /* update channel */ 1776 af_params->channel = cpu_to_le32(afx_hdl->peer_chan); 1777 } 1778 1779 tx_retry = 0; 1780 while (!p2p->block_gon_req_tx && 1781 (ack == false) && (tx_retry < P2P_AF_TX_MAX_RETRY)) { 1782 ack = !brcmf_p2p_tx_action_frame(p2p, af_params); 1783 tx_retry++; 1784 } 1785 if (ack == false) { 1786 brcmf_err("Failed to send Action Frame(retry %d)\n", tx_retry); 1787 clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status); 1788 } 1789 1790 exit: 1791 clear_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status); 1792 1793 /* WAR: sometimes dongle does not keep the dwell time of 'actframe'. 1794 * if we coundn't get the next action response frame and dongle does 1795 * not keep the dwell time, go to listen state again to get next action 1796 * response frame. 1797 */ 1798 if (ack && config_af_params.extra_listen && !p2p->block_gon_req_tx && 1799 test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status) && 1800 p2p->af_sent_channel == afx_hdl->my_listen_chan) { 1801 delta_ms = jiffies_to_msecs(jiffies - p2p->af_tx_sent_jiffies); 1802 if (le32_to_cpu(af_params->dwell_time) > delta_ms) 1803 extra_listen_time = le32_to_cpu(af_params->dwell_time) - 1804 delta_ms; 1805 else 1806 extra_listen_time = 0; 1807 if (extra_listen_time > 50) { 1808 set_bit(BRCMF_P2P_STATUS_WAITING_NEXT_AF_LISTEN, 1809 &p2p->status); 1810 brcmf_dbg(INFO, "Wait more time! actual af time:%d, calculated extra listen:%d\n", 1811 le32_to_cpu(af_params->dwell_time), 1812 extra_listen_time); 1813 extra_listen_time += 100; 1814 if (!brcmf_p2p_discover_listen(p2p, 1815 p2p->af_sent_channel, 1816 extra_listen_time)) { 1817 unsigned long duration; 1818 1819 extra_listen_time += 100; 1820 duration = msecs_to_jiffies(extra_listen_time); 1821 wait_for_completion_timeout(&p2p->wait_next_af, 1822 duration); 1823 } 1824 clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_AF_LISTEN, 1825 &p2p->status); 1826 } 1827 } 1828 1829 if (p2p->block_gon_req_tx) { 1830 /* if ack is true, supplicant will wait more time(100ms). 1831 * so we will return it as a success to get more time . 1832 */ 1833 p2p->block_gon_req_tx = false; 1834 ack = true; 1835 } 1836 1837 clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status); 1838 /* if all done, turn mpc on again */ 1839 if (config_af_params.mpc_onoff == 1) 1840 brcmf_set_mpc(ifp, 1); 1841 1842 return ack; 1843 } 1844 1845 /** 1846 * brcmf_p2p_notify_rx_mgmt_p2p_probereq() - Event handler for p2p probe req. 1847 * 1848 * @ifp: interface pointer for which event was received. 1849 * @e: even message. 1850 * @data: payload of event message (probe request). 1851 */ 1852 s32 brcmf_p2p_notify_rx_mgmt_p2p_probereq(struct brcmf_if *ifp, 1853 const struct brcmf_event_msg *e, 1854 void *data) 1855 { 1856 struct brcmf_cfg80211_info *cfg = ifp->drvr->config; 1857 struct brcmf_p2p_info *p2p = &cfg->p2p; 1858 struct afx_hdl *afx_hdl = &p2p->afx_hdl; 1859 struct brcmf_cfg80211_vif *vif = ifp->vif; 1860 struct brcmf_rx_mgmt_data *rxframe = (struct brcmf_rx_mgmt_data *)data; 1861 struct brcmu_chan ch; 1862 u8 *mgmt_frame; 1863 u32 mgmt_frame_len; 1864 s32 freq; 1865 u16 mgmt_type; 1866 1867 brcmf_dbg(INFO, "Enter: event %d reason %d\n", e->event_code, 1868 e->reason); 1869 1870 if (e->datalen < sizeof(*rxframe)) { 1871 brcmf_dbg(SCAN, "Event data to small. Ignore\n"); 1872 return 0; 1873 } 1874 1875 ch.chspec = be16_to_cpu(rxframe->chanspec); 1876 cfg->d11inf.decchspec(&ch); 1877 1878 if (test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status) && 1879 (ether_addr_equal(afx_hdl->tx_dst_addr, e->addr))) { 1880 afx_hdl->peer_chan = ch.control_ch_num; 1881 brcmf_dbg(INFO, "PROBE REQUEST: Peer found, channel=%d\n", 1882 afx_hdl->peer_chan); 1883 complete(&afx_hdl->act_frm_scan); 1884 } 1885 1886 /* Firmware sends us two proberesponses for each idx one. At the */ 1887 /* moment anything but bsscfgidx 0 is passed up to supplicant */ 1888 if (e->bsscfgidx == 0) 1889 return 0; 1890 1891 /* Filter any P2P probe reqs arriving during the GO-NEG Phase */ 1892 if (test_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status)) { 1893 brcmf_dbg(INFO, "Filtering P2P probe_req in GO-NEG phase\n"); 1894 return 0; 1895 } 1896 1897 /* Check if wpa_supplicant has registered for this frame */ 1898 brcmf_dbg(INFO, "vif->mgmt_rx_reg %04x\n", vif->mgmt_rx_reg); 1899 mgmt_type = (IEEE80211_STYPE_PROBE_REQ & IEEE80211_FCTL_STYPE) >> 4; 1900 if ((vif->mgmt_rx_reg & BIT(mgmt_type)) == 0) 1901 return 0; 1902 1903 mgmt_frame = (u8 *)(rxframe + 1); 1904 mgmt_frame_len = e->datalen - sizeof(*rxframe); 1905 freq = ieee80211_channel_to_frequency(ch.control_ch_num, 1906 ch.band == BRCMU_CHAN_BAND_2G ? 1907 NL80211_BAND_2GHZ : 1908 NL80211_BAND_5GHZ); 1909 1910 cfg80211_rx_mgmt(&vif->wdev, freq, 0, mgmt_frame, mgmt_frame_len, 0); 1911 1912 brcmf_dbg(INFO, "mgmt_frame_len (%d) , e->datalen (%d), chanspec (%04x), freq (%d)\n", 1913 mgmt_frame_len, e->datalen, ch.chspec, freq); 1914 1915 return 0; 1916 } 1917 1918 1919 /** 1920 * brcmf_p2p_get_current_chanspec() - Get current operation channel. 1921 * 1922 * @p2p: P2P specific data. 1923 * @chanspec: chanspec to be returned. 1924 */ 1925 static void brcmf_p2p_get_current_chanspec(struct brcmf_p2p_info *p2p, 1926 u16 *chanspec) 1927 { 1928 struct brcmf_if *ifp; 1929 u8 mac_addr[ETH_ALEN]; 1930 struct brcmu_chan ch; 1931 struct brcmf_bss_info_le *bi; 1932 u8 *buf; 1933 1934 ifp = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->ifp; 1935 1936 if (brcmf_fil_cmd_data_get(ifp, BRCMF_C_GET_BSSID, mac_addr, 1937 ETH_ALEN) == 0) { 1938 buf = kzalloc(WL_BSS_INFO_MAX, GFP_KERNEL); 1939 if (buf != NULL) { 1940 *(__le32 *)buf = cpu_to_le32(WL_BSS_INFO_MAX); 1941 if (brcmf_fil_cmd_data_get(ifp, BRCMF_C_GET_BSS_INFO, 1942 buf, WL_BSS_INFO_MAX) == 0) { 1943 bi = (struct brcmf_bss_info_le *)(buf + 4); 1944 *chanspec = le16_to_cpu(bi->chanspec); 1945 kfree(buf); 1946 return; 1947 } 1948 kfree(buf); 1949 } 1950 } 1951 /* Use default channel for P2P */ 1952 ch.chnum = BRCMF_P2P_TEMP_CHAN; 1953 ch.bw = BRCMU_CHAN_BW_20; 1954 p2p->cfg->d11inf.encchspec(&ch); 1955 *chanspec = ch.chspec; 1956 } 1957 1958 /** 1959 * Change a P2P Role. 1960 * Parameters: 1961 * @mac: MAC address of the BSS to change a role 1962 * Returns 0 if success. 1963 */ 1964 int brcmf_p2p_ifchange(struct brcmf_cfg80211_info *cfg, 1965 enum brcmf_fil_p2p_if_types if_type) 1966 { 1967 struct brcmf_p2p_info *p2p = &cfg->p2p; 1968 struct brcmf_cfg80211_vif *vif; 1969 struct brcmf_fil_p2p_if_le if_request; 1970 s32 err; 1971 u16 chanspec; 1972 1973 brcmf_dbg(TRACE, "Enter\n"); 1974 1975 vif = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif; 1976 if (!vif) { 1977 brcmf_err("vif for P2PAPI_BSSCFG_PRIMARY does not exist\n"); 1978 return -EPERM; 1979 } 1980 brcmf_notify_escan_complete(cfg, vif->ifp, true, true); 1981 vif = p2p->bss_idx[P2PAPI_BSSCFG_CONNECTION].vif; 1982 if (!vif) { 1983 brcmf_err("vif for P2PAPI_BSSCFG_CONNECTION does not exist\n"); 1984 return -EPERM; 1985 } 1986 brcmf_set_mpc(vif->ifp, 0); 1987 1988 /* In concurrency case, STA may be already associated in a particular */ 1989 /* channel. so retrieve the current channel of primary interface and */ 1990 /* then start the virtual interface on that. */ 1991 brcmf_p2p_get_current_chanspec(p2p, &chanspec); 1992 1993 if_request.type = cpu_to_le16((u16)if_type); 1994 if_request.chspec = cpu_to_le16(chanspec); 1995 memcpy(if_request.addr, p2p->int_addr, sizeof(if_request.addr)); 1996 1997 brcmf_cfg80211_arm_vif_event(cfg, vif); 1998 err = brcmf_fil_iovar_data_set(vif->ifp, "p2p_ifupd", &if_request, 1999 sizeof(if_request)); 2000 if (err) { 2001 brcmf_err("p2p_ifupd FAILED, err=%d\n", err); 2002 brcmf_cfg80211_arm_vif_event(cfg, NULL); 2003 return err; 2004 } 2005 err = brcmf_cfg80211_wait_vif_event(cfg, BRCMF_E_IF_CHANGE, 2006 BRCMF_VIF_EVENT_TIMEOUT); 2007 brcmf_cfg80211_arm_vif_event(cfg, NULL); 2008 if (!err) { 2009 brcmf_err("No BRCMF_E_IF_CHANGE event received\n"); 2010 return -EIO; 2011 } 2012 2013 err = brcmf_fil_cmd_int_set(vif->ifp, BRCMF_C_SET_SCB_TIMEOUT, 2014 BRCMF_SCB_TIMEOUT_VALUE); 2015 2016 return err; 2017 } 2018 2019 static int brcmf_p2p_request_p2p_if(struct brcmf_p2p_info *p2p, 2020 struct brcmf_if *ifp, u8 ea[ETH_ALEN], 2021 enum brcmf_fil_p2p_if_types iftype) 2022 { 2023 struct brcmf_fil_p2p_if_le if_request; 2024 int err; 2025 u16 chanspec; 2026 2027 /* we need a default channel */ 2028 brcmf_p2p_get_current_chanspec(p2p, &chanspec); 2029 2030 /* fill the firmware request */ 2031 memcpy(if_request.addr, ea, ETH_ALEN); 2032 if_request.type = cpu_to_le16((u16)iftype); 2033 if_request.chspec = cpu_to_le16(chanspec); 2034 2035 err = brcmf_fil_iovar_data_set(ifp, "p2p_ifadd", &if_request, 2036 sizeof(if_request)); 2037 2038 return err; 2039 } 2040 2041 static int brcmf_p2p_disable_p2p_if(struct brcmf_cfg80211_vif *vif) 2042 { 2043 struct brcmf_cfg80211_info *cfg = wdev_to_cfg(&vif->wdev); 2044 struct net_device *pri_ndev = cfg_to_ndev(cfg); 2045 struct brcmf_if *ifp = netdev_priv(pri_ndev); 2046 u8 *addr = vif->wdev.netdev->dev_addr; 2047 2048 return brcmf_fil_iovar_data_set(ifp, "p2p_ifdis", addr, ETH_ALEN); 2049 } 2050 2051 static int brcmf_p2p_release_p2p_if(struct brcmf_cfg80211_vif *vif) 2052 { 2053 struct brcmf_cfg80211_info *cfg = wdev_to_cfg(&vif->wdev); 2054 struct net_device *pri_ndev = cfg_to_ndev(cfg); 2055 struct brcmf_if *ifp = netdev_priv(pri_ndev); 2056 u8 *addr = vif->wdev.netdev->dev_addr; 2057 2058 return brcmf_fil_iovar_data_set(ifp, "p2p_ifdel", addr, ETH_ALEN); 2059 } 2060 2061 /** 2062 * brcmf_p2p_create_p2pdev() - create a P2P_DEVICE virtual interface. 2063 * 2064 * @p2p: P2P specific data. 2065 * @wiphy: wiphy device of new interface. 2066 * @addr: mac address for this new interface. 2067 */ 2068 static struct wireless_dev *brcmf_p2p_create_p2pdev(struct brcmf_p2p_info *p2p, 2069 struct wiphy *wiphy, 2070 u8 *addr) 2071 { 2072 struct brcmf_cfg80211_vif *p2p_vif; 2073 struct brcmf_if *p2p_ifp; 2074 struct brcmf_if *pri_ifp; 2075 int err; 2076 u32 bsscfgidx; 2077 2078 if (p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif) 2079 return ERR_PTR(-ENOSPC); 2080 2081 p2p_vif = brcmf_alloc_vif(p2p->cfg, NL80211_IFTYPE_P2P_DEVICE); 2082 if (IS_ERR(p2p_vif)) { 2083 brcmf_err("could not create discovery vif\n"); 2084 return (struct wireless_dev *)p2p_vif; 2085 } 2086 2087 pri_ifp = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->ifp; 2088 2089 /* firmware requires unique mac address for p2pdev interface */ 2090 if (addr && ether_addr_equal(addr, pri_ifp->mac_addr)) { 2091 brcmf_err("discovery vif must be different from primary interface\n"); 2092 return ERR_PTR(-EINVAL); 2093 } 2094 2095 brcmf_p2p_generate_bss_mac(p2p, addr); 2096 brcmf_p2p_set_firmware(pri_ifp, p2p->dev_addr); 2097 2098 brcmf_cfg80211_arm_vif_event(p2p->cfg, p2p_vif); 2099 brcmf_fweh_p2pdev_setup(pri_ifp, true); 2100 2101 /* Initialize P2P Discovery in the firmware */ 2102 err = brcmf_fil_iovar_int_set(pri_ifp, "p2p_disc", 1); 2103 if (err < 0) { 2104 brcmf_err("set p2p_disc error\n"); 2105 brcmf_fweh_p2pdev_setup(pri_ifp, false); 2106 brcmf_cfg80211_arm_vif_event(p2p->cfg, NULL); 2107 goto fail; 2108 } 2109 2110 /* wait for firmware event */ 2111 err = brcmf_cfg80211_wait_vif_event(p2p->cfg, BRCMF_E_IF_ADD, 2112 BRCMF_VIF_EVENT_TIMEOUT); 2113 brcmf_cfg80211_arm_vif_event(p2p->cfg, NULL); 2114 brcmf_fweh_p2pdev_setup(pri_ifp, false); 2115 if (!err) { 2116 brcmf_err("timeout occurred\n"); 2117 err = -EIO; 2118 goto fail; 2119 } 2120 2121 /* discovery interface created */ 2122 p2p_ifp = p2p_vif->ifp; 2123 p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif = p2p_vif; 2124 memcpy(p2p_ifp->mac_addr, p2p->dev_addr, ETH_ALEN); 2125 memcpy(&p2p_vif->wdev.address, p2p->dev_addr, sizeof(p2p->dev_addr)); 2126 2127 /* verify bsscfg index for P2P discovery */ 2128 err = brcmf_fil_iovar_int_get(pri_ifp, "p2p_dev", &bsscfgidx); 2129 if (err < 0) { 2130 brcmf_err("retrieving discover bsscfg index failed\n"); 2131 goto fail; 2132 } 2133 2134 WARN_ON(p2p_ifp->bsscfgidx != bsscfgidx); 2135 2136 init_completion(&p2p->send_af_done); 2137 INIT_WORK(&p2p->afx_hdl.afx_work, brcmf_p2p_afx_handler); 2138 init_completion(&p2p->afx_hdl.act_frm_scan); 2139 init_completion(&p2p->wait_next_af); 2140 2141 return &p2p_vif->wdev; 2142 2143 fail: 2144 brcmf_free_vif(p2p_vif); 2145 return ERR_PTR(err); 2146 } 2147 2148 /** 2149 * brcmf_p2p_add_vif() - create a new P2P virtual interface. 2150 * 2151 * @wiphy: wiphy device of new interface. 2152 * @name: name of the new interface. 2153 * @name_assign_type: origin of the interface name 2154 * @type: nl80211 interface type. 2155 * @params: contains mac address for P2P device. 2156 */ 2157 struct wireless_dev *brcmf_p2p_add_vif(struct wiphy *wiphy, const char *name, 2158 unsigned char name_assign_type, 2159 enum nl80211_iftype type, 2160 struct vif_params *params) 2161 { 2162 struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy); 2163 struct brcmf_if *ifp = netdev_priv(cfg_to_ndev(cfg)); 2164 struct brcmf_cfg80211_vif *vif; 2165 enum brcmf_fil_p2p_if_types iftype; 2166 int err; 2167 2168 if (brcmf_cfg80211_vif_event_armed(cfg)) 2169 return ERR_PTR(-EBUSY); 2170 2171 brcmf_dbg(INFO, "adding vif \"%s\" (type=%d)\n", name, type); 2172 2173 switch (type) { 2174 case NL80211_IFTYPE_P2P_CLIENT: 2175 iftype = BRCMF_FIL_P2P_IF_CLIENT; 2176 break; 2177 case NL80211_IFTYPE_P2P_GO: 2178 iftype = BRCMF_FIL_P2P_IF_GO; 2179 break; 2180 case NL80211_IFTYPE_P2P_DEVICE: 2181 return brcmf_p2p_create_p2pdev(&cfg->p2p, wiphy, 2182 params->macaddr); 2183 default: 2184 return ERR_PTR(-EOPNOTSUPP); 2185 } 2186 2187 vif = brcmf_alloc_vif(cfg, type); 2188 if (IS_ERR(vif)) 2189 return (struct wireless_dev *)vif; 2190 brcmf_cfg80211_arm_vif_event(cfg, vif); 2191 2192 err = brcmf_p2p_request_p2p_if(&cfg->p2p, ifp, cfg->p2p.int_addr, 2193 iftype); 2194 if (err) { 2195 brcmf_cfg80211_arm_vif_event(cfg, NULL); 2196 goto fail; 2197 } 2198 2199 /* wait for firmware event */ 2200 err = brcmf_cfg80211_wait_vif_event(cfg, BRCMF_E_IF_ADD, 2201 BRCMF_VIF_EVENT_TIMEOUT); 2202 brcmf_cfg80211_arm_vif_event(cfg, NULL); 2203 if (!err) { 2204 brcmf_err("timeout occurred\n"); 2205 err = -EIO; 2206 goto fail; 2207 } 2208 2209 /* interface created in firmware */ 2210 ifp = vif->ifp; 2211 if (!ifp) { 2212 brcmf_err("no if pointer provided\n"); 2213 err = -ENOENT; 2214 goto fail; 2215 } 2216 2217 strncpy(ifp->ndev->name, name, sizeof(ifp->ndev->name) - 1); 2218 ifp->ndev->name_assign_type = name_assign_type; 2219 err = brcmf_net_attach(ifp, true); 2220 if (err) { 2221 brcmf_err("Registering netdevice failed\n"); 2222 free_netdev(ifp->ndev); 2223 goto fail; 2224 } 2225 2226 cfg->p2p.bss_idx[P2PAPI_BSSCFG_CONNECTION].vif = vif; 2227 /* Disable firmware roaming for P2P interface */ 2228 brcmf_fil_iovar_int_set(ifp, "roam_off", 1); 2229 if (iftype == BRCMF_FIL_P2P_IF_GO) { 2230 /* set station timeout for p2p */ 2231 brcmf_fil_cmd_int_set(ifp, BRCMF_C_SET_SCB_TIMEOUT, 2232 BRCMF_SCB_TIMEOUT_VALUE); 2233 } 2234 return &ifp->vif->wdev; 2235 2236 fail: 2237 brcmf_free_vif(vif); 2238 return ERR_PTR(err); 2239 } 2240 2241 /** 2242 * brcmf_p2p_del_vif() - delete a P2P virtual interface. 2243 * 2244 * @wiphy: wiphy device of interface. 2245 * @wdev: wireless device of interface. 2246 */ 2247 int brcmf_p2p_del_vif(struct wiphy *wiphy, struct wireless_dev *wdev) 2248 { 2249 struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy); 2250 struct brcmf_p2p_info *p2p = &cfg->p2p; 2251 struct brcmf_cfg80211_vif *vif; 2252 enum nl80211_iftype iftype; 2253 bool wait_for_disable = false; 2254 int err; 2255 2256 brcmf_dbg(TRACE, "delete P2P vif\n"); 2257 vif = container_of(wdev, struct brcmf_cfg80211_vif, wdev); 2258 2259 iftype = vif->wdev.iftype; 2260 brcmf_cfg80211_arm_vif_event(cfg, vif); 2261 switch (iftype) { 2262 case NL80211_IFTYPE_P2P_CLIENT: 2263 if (test_bit(BRCMF_VIF_STATUS_DISCONNECTING, &vif->sme_state)) 2264 wait_for_disable = true; 2265 break; 2266 2267 case NL80211_IFTYPE_P2P_GO: 2268 if (!brcmf_p2p_disable_p2p_if(vif)) 2269 wait_for_disable = true; 2270 break; 2271 2272 case NL80211_IFTYPE_P2P_DEVICE: 2273 if (!p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif) 2274 return 0; 2275 brcmf_p2p_cancel_remain_on_channel(vif->ifp); 2276 brcmf_p2p_deinit_discovery(p2p); 2277 break; 2278 2279 default: 2280 return -ENOTSUPP; 2281 } 2282 2283 clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status); 2284 brcmf_dbg(INFO, "P2P: GO_NEG_PHASE status cleared\n"); 2285 2286 if (wait_for_disable) 2287 wait_for_completion_timeout(&cfg->vif_disabled, 2288 BRCMF_P2P_DISABLE_TIMEOUT); 2289 2290 err = 0; 2291 if (iftype != NL80211_IFTYPE_P2P_DEVICE) { 2292 brcmf_vif_clear_mgmt_ies(vif); 2293 err = brcmf_p2p_release_p2p_if(vif); 2294 } 2295 if (!err) { 2296 /* wait for firmware event */ 2297 err = brcmf_cfg80211_wait_vif_event(cfg, BRCMF_E_IF_DEL, 2298 BRCMF_VIF_EVENT_TIMEOUT); 2299 if (!err) 2300 err = -EIO; 2301 else 2302 err = 0; 2303 } 2304 brcmf_remove_interface(vif->ifp, true); 2305 2306 brcmf_cfg80211_arm_vif_event(cfg, NULL); 2307 if (iftype != NL80211_IFTYPE_P2P_DEVICE) 2308 p2p->bss_idx[P2PAPI_BSSCFG_CONNECTION].vif = NULL; 2309 2310 return err; 2311 } 2312 2313 void brcmf_p2p_ifp_removed(struct brcmf_if *ifp, bool rtnl_locked) 2314 { 2315 struct brcmf_cfg80211_info *cfg; 2316 struct brcmf_cfg80211_vif *vif; 2317 2318 brcmf_dbg(INFO, "P2P: device interface removed\n"); 2319 vif = ifp->vif; 2320 cfg = wdev_to_cfg(&vif->wdev); 2321 cfg->p2p.bss_idx[P2PAPI_BSSCFG_DEVICE].vif = NULL; 2322 if (!rtnl_locked) 2323 rtnl_lock(); 2324 cfg80211_unregister_wdev(&vif->wdev); 2325 if (!rtnl_locked) 2326 rtnl_unlock(); 2327 brcmf_free_vif(vif); 2328 } 2329 2330 int brcmf_p2p_start_device(struct wiphy *wiphy, struct wireless_dev *wdev) 2331 { 2332 struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy); 2333 struct brcmf_p2p_info *p2p = &cfg->p2p; 2334 struct brcmf_cfg80211_vif *vif; 2335 int err; 2336 2337 vif = container_of(wdev, struct brcmf_cfg80211_vif, wdev); 2338 mutex_lock(&cfg->usr_sync); 2339 err = brcmf_p2p_enable_discovery(p2p); 2340 if (!err) 2341 set_bit(BRCMF_VIF_STATUS_READY, &vif->sme_state); 2342 mutex_unlock(&cfg->usr_sync); 2343 return err; 2344 } 2345 2346 void brcmf_p2p_stop_device(struct wiphy *wiphy, struct wireless_dev *wdev) 2347 { 2348 struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy); 2349 struct brcmf_p2p_info *p2p = &cfg->p2p; 2350 struct brcmf_cfg80211_vif *vif; 2351 2352 vif = container_of(wdev, struct brcmf_cfg80211_vif, wdev); 2353 /* This call can be result of the unregister_wdev call. In that case 2354 * we dont want to do anything anymore. Just return. The config vif 2355 * will have been cleared at this point. 2356 */ 2357 if (p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif == vif) { 2358 mutex_lock(&cfg->usr_sync); 2359 /* Set the discovery state to SCAN */ 2360 (void)brcmf_p2p_set_discover_state(vif->ifp, 2361 WL_P2P_DISC_ST_SCAN, 0, 0); 2362 brcmf_abort_scanning(cfg); 2363 clear_bit(BRCMF_VIF_STATUS_READY, &vif->sme_state); 2364 mutex_unlock(&cfg->usr_sync); 2365 } 2366 } 2367 2368 /** 2369 * brcmf_p2p_attach() - attach for P2P. 2370 * 2371 * @cfg: driver private data for cfg80211 interface. 2372 * @p2pdev_forced: create p2p device interface at attach. 2373 */ 2374 s32 brcmf_p2p_attach(struct brcmf_cfg80211_info *cfg, bool p2pdev_forced) 2375 { 2376 struct brcmf_p2p_info *p2p; 2377 struct brcmf_if *pri_ifp; 2378 s32 err = 0; 2379 void *err_ptr; 2380 2381 p2p = &cfg->p2p; 2382 p2p->cfg = cfg; 2383 2384 pri_ifp = brcmf_get_ifp(cfg->pub, 0); 2385 p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif = pri_ifp->vif; 2386 2387 if (p2pdev_forced) { 2388 err_ptr = brcmf_p2p_create_p2pdev(p2p, NULL, NULL); 2389 if (IS_ERR(err_ptr)) { 2390 brcmf_err("P2P device creation failed.\n"); 2391 err = PTR_ERR(err_ptr); 2392 } 2393 } else { 2394 p2p->p2pdev_dynamically = true; 2395 } 2396 return err; 2397 } 2398 2399 /** 2400 * brcmf_p2p_detach() - detach P2P. 2401 * 2402 * @p2p: P2P specific data. 2403 */ 2404 void brcmf_p2p_detach(struct brcmf_p2p_info *p2p) 2405 { 2406 struct brcmf_cfg80211_vif *vif; 2407 2408 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif; 2409 if (vif != NULL) { 2410 brcmf_p2p_cancel_remain_on_channel(vif->ifp); 2411 brcmf_p2p_deinit_discovery(p2p); 2412 brcmf_remove_interface(vif->ifp, false); 2413 } 2414 /* just set it all to zero */ 2415 memset(p2p, 0, sizeof(*p2p)); 2416 } 2417 2418