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 struct brcmf_pub *drvr = ifp->drvr; 438 s32 ret = 0; 439 440 brcmf_fil_cmd_int_set(ifp, BRCMF_C_DOWN, 1); 441 brcmf_fil_iovar_int_set(ifp, "apsta", 1); 442 brcmf_fil_cmd_int_set(ifp, BRCMF_C_UP, 1); 443 444 /* In case of COB type, firmware has default mac address 445 * After Initializing firmware, we have to set current mac address to 446 * firmware for P2P device address. This must be done with discovery 447 * disabled. 448 */ 449 brcmf_fil_iovar_int_set(ifp, "p2p_disc", 0); 450 451 ret = brcmf_fil_iovar_data_set(ifp, "p2p_da_override", p2p_mac, 452 ETH_ALEN); 453 if (ret) 454 bphy_err(drvr, "failed to update device address ret %d\n", ret); 455 456 return ret; 457 } 458 459 /** 460 * brcmf_p2p_generate_bss_mac() - derive mac addresses for P2P. 461 * 462 * @p2p: P2P specific data. 463 * @dev_addr: optional device address. 464 * 465 * P2P needs mac addresses for P2P device and interface. If no device 466 * address it specified, these are derived from a random ethernet 467 * address. 468 */ 469 static void brcmf_p2p_generate_bss_mac(struct brcmf_p2p_info *p2p, u8 *dev_addr) 470 { 471 bool random_addr = false; 472 473 if (!dev_addr || is_zero_ether_addr(dev_addr)) 474 random_addr = true; 475 476 /* Generate the P2P Device Address obtaining a random ethernet 477 * address with the locally administered bit set. 478 */ 479 if (random_addr) 480 eth_random_addr(p2p->dev_addr); 481 else 482 memcpy(p2p->dev_addr, dev_addr, ETH_ALEN); 483 484 /* Generate the P2P Interface Address. If the discovery and connection 485 * BSSCFGs need to simultaneously co-exist, then this address must be 486 * different from the P2P Device Address, but also locally administered. 487 */ 488 memcpy(p2p->int_addr, p2p->dev_addr, ETH_ALEN); 489 p2p->int_addr[0] |= 0x02; 490 p2p->int_addr[4] ^= 0x80; 491 } 492 493 /** 494 * brcmf_p2p_scan_is_p2p_request() - is cfg80211 scan request a P2P scan. 495 * 496 * @request: the scan request as received from cfg80211. 497 * 498 * returns true if one of the ssids in the request matches the 499 * P2P wildcard ssid; otherwise returns false. 500 */ 501 static bool brcmf_p2p_scan_is_p2p_request(struct cfg80211_scan_request *request) 502 { 503 struct cfg80211_ssid *ssids = request->ssids; 504 int i; 505 506 for (i = 0; i < request->n_ssids; i++) { 507 if (ssids[i].ssid_len != BRCMF_P2P_WILDCARD_SSID_LEN) 508 continue; 509 510 brcmf_dbg(INFO, "comparing ssid \"%s\"", ssids[i].ssid); 511 if (!memcmp(BRCMF_P2P_WILDCARD_SSID, ssids[i].ssid, 512 BRCMF_P2P_WILDCARD_SSID_LEN)) 513 return true; 514 } 515 return false; 516 } 517 518 /** 519 * brcmf_p2p_set_discover_state - set discover state in firmware. 520 * 521 * @ifp: low-level interface object. 522 * @state: discover state to set. 523 * @chanspec: channel parameters (for state @WL_P2P_DISC_ST_LISTEN only). 524 * @listen_ms: duration to listen (for state @WL_P2P_DISC_ST_LISTEN only). 525 */ 526 static s32 brcmf_p2p_set_discover_state(struct brcmf_if *ifp, u8 state, 527 u16 chanspec, u16 listen_ms) 528 { 529 struct brcmf_p2p_disc_st_le discover_state; 530 s32 ret = 0; 531 brcmf_dbg(TRACE, "enter\n"); 532 533 discover_state.state = state; 534 discover_state.chspec = cpu_to_le16(chanspec); 535 discover_state.dwell = cpu_to_le16(listen_ms); 536 ret = brcmf_fil_bsscfg_data_set(ifp, "p2p_state", &discover_state, 537 sizeof(discover_state)); 538 return ret; 539 } 540 541 /** 542 * brcmf_p2p_deinit_discovery() - disable P2P device discovery. 543 * 544 * @p2p: P2P specific data. 545 * 546 * Resets the discovery state and disables it in firmware. 547 */ 548 static s32 brcmf_p2p_deinit_discovery(struct brcmf_p2p_info *p2p) 549 { 550 struct brcmf_cfg80211_vif *vif; 551 552 brcmf_dbg(TRACE, "enter\n"); 553 554 /* Set the discovery state to SCAN */ 555 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif; 556 (void)brcmf_p2p_set_discover_state(vif->ifp, WL_P2P_DISC_ST_SCAN, 0, 0); 557 558 /* Disable P2P discovery in the firmware */ 559 vif = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif; 560 (void)brcmf_fil_iovar_int_set(vif->ifp, "p2p_disc", 0); 561 562 return 0; 563 } 564 565 /** 566 * brcmf_p2p_enable_discovery() - initialize and configure discovery. 567 * 568 * @p2p: P2P specific data. 569 * 570 * Initializes the discovery device and configure the virtual interface. 571 */ 572 static int brcmf_p2p_enable_discovery(struct brcmf_p2p_info *p2p) 573 { 574 struct brcmf_pub *drvr = p2p->cfg->pub; 575 struct brcmf_cfg80211_vif *vif; 576 s32 ret = 0; 577 578 brcmf_dbg(TRACE, "enter\n"); 579 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif; 580 if (!vif) { 581 bphy_err(drvr, "P2P config device not available\n"); 582 ret = -EPERM; 583 goto exit; 584 } 585 586 if (test_bit(BRCMF_P2P_STATUS_ENABLED, &p2p->status)) { 587 brcmf_dbg(INFO, "P2P config device already configured\n"); 588 goto exit; 589 } 590 591 /* Re-initialize P2P Discovery in the firmware */ 592 vif = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif; 593 ret = brcmf_fil_iovar_int_set(vif->ifp, "p2p_disc", 1); 594 if (ret < 0) { 595 bphy_err(drvr, "set p2p_disc error\n"); 596 goto exit; 597 } 598 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif; 599 ret = brcmf_p2p_set_discover_state(vif->ifp, WL_P2P_DISC_ST_SCAN, 0, 0); 600 if (ret < 0) { 601 bphy_err(drvr, "unable to set WL_P2P_DISC_ST_SCAN\n"); 602 goto exit; 603 } 604 605 /* 606 * Set wsec to any non-zero value in the discovery bsscfg 607 * to ensure our P2P probe responses have the privacy bit 608 * set in the 802.11 WPA IE. Some peer devices may not 609 * initiate WPS with us if this bit is not set. 610 */ 611 ret = brcmf_fil_bsscfg_int_set(vif->ifp, "wsec", AES_ENABLED); 612 if (ret < 0) { 613 bphy_err(drvr, "wsec error %d\n", ret); 614 goto exit; 615 } 616 617 set_bit(BRCMF_P2P_STATUS_ENABLED, &p2p->status); 618 exit: 619 return ret; 620 } 621 622 /** 623 * brcmf_p2p_escan() - initiate a P2P scan. 624 * 625 * @p2p: P2P specific data. 626 * @num_chans: number of channels to scan. 627 * @chanspecs: channel parameters for @num_chans channels. 628 * @search_state: P2P discover state to use. 629 * @bss_type: type of P2P bss. 630 */ 631 static s32 brcmf_p2p_escan(struct brcmf_p2p_info *p2p, u32 num_chans, 632 u16 chanspecs[], s32 search_state, 633 enum p2p_bss_type bss_type) 634 { 635 struct brcmf_pub *drvr = p2p->cfg->pub; 636 s32 ret = 0; 637 s32 memsize = offsetof(struct brcmf_p2p_scan_le, 638 eparams.params_le.channel_list); 639 s32 nprobes; 640 s32 active; 641 u32 i; 642 u8 *memblk; 643 struct brcmf_cfg80211_vif *vif; 644 struct brcmf_p2p_scan_le *p2p_params; 645 struct brcmf_scan_params_le *sparams; 646 647 memsize += num_chans * sizeof(__le16); 648 memblk = kzalloc(memsize, GFP_KERNEL); 649 if (!memblk) 650 return -ENOMEM; 651 652 vif = p2p->bss_idx[bss_type].vif; 653 if (vif == NULL) { 654 bphy_err(drvr, "no vif for bss type %d\n", bss_type); 655 ret = -EINVAL; 656 goto exit; 657 } 658 p2p_params = (struct brcmf_p2p_scan_le *)memblk; 659 sparams = &p2p_params->eparams.params_le; 660 661 switch (search_state) { 662 case WL_P2P_DISC_ST_SEARCH: 663 /* 664 * If we in SEARCH STATE, we don't need to set SSID explictly 665 * because dongle use P2P WILDCARD internally by default, use 666 * null ssid, which it is already due to kzalloc. 667 */ 668 break; 669 case WL_P2P_DISC_ST_SCAN: 670 /* 671 * wpa_supplicant has p2p_find command with type social or 672 * progressive. For progressive, we need to set the ssid to 673 * P2P WILDCARD because we just do broadcast scan unless 674 * setting SSID. 675 */ 676 sparams->ssid_le.SSID_len = 677 cpu_to_le32(BRCMF_P2P_WILDCARD_SSID_LEN); 678 memcpy(sparams->ssid_le.SSID, BRCMF_P2P_WILDCARD_SSID, 679 BRCMF_P2P_WILDCARD_SSID_LEN); 680 break; 681 default: 682 bphy_err(drvr, " invalid search state %d\n", search_state); 683 ret = -EINVAL; 684 goto exit; 685 } 686 687 brcmf_p2p_set_discover_state(vif->ifp, search_state, 0, 0); 688 689 /* 690 * set p2p scan parameters. 691 */ 692 p2p_params->type = 'E'; 693 694 /* determine the scan engine parameters */ 695 sparams->bss_type = DOT11_BSSTYPE_ANY; 696 sparams->scan_type = BRCMF_SCANTYPE_ACTIVE; 697 698 eth_broadcast_addr(sparams->bssid); 699 sparams->home_time = cpu_to_le32(P2PAPI_SCAN_HOME_TIME_MS); 700 701 /* 702 * SOCIAL_CHAN_CNT + 1 takes care of the Progressive scan 703 * supported by the supplicant. 704 */ 705 if (num_chans == SOCIAL_CHAN_CNT || num_chans == (SOCIAL_CHAN_CNT + 1)) 706 active = P2PAPI_SCAN_SOCIAL_DWELL_TIME_MS; 707 else if (num_chans == AF_PEER_SEARCH_CNT) 708 active = P2PAPI_SCAN_AF_SEARCH_DWELL_TIME_MS; 709 else if (brcmf_get_vif_state_any(p2p->cfg, BRCMF_VIF_STATUS_CONNECTED)) 710 active = -1; 711 else 712 active = P2PAPI_SCAN_DWELL_TIME_MS; 713 714 /* Override scan params to find a peer for a connection */ 715 if (num_chans == 1) { 716 active = WL_SCAN_CONNECT_DWELL_TIME_MS; 717 /* WAR to sync with presence period of VSDB GO. 718 * send probe request more frequently 719 */ 720 nprobes = active / WL_SCAN_JOIN_PROBE_INTERVAL_MS; 721 } else { 722 nprobes = active / P2PAPI_SCAN_NPROBS_TIME_MS; 723 } 724 725 if (nprobes <= 0) 726 nprobes = 1; 727 728 brcmf_dbg(INFO, "nprobes # %d, active_time %d\n", nprobes, active); 729 sparams->active_time = cpu_to_le32(active); 730 sparams->nprobes = cpu_to_le32(nprobes); 731 sparams->passive_time = cpu_to_le32(-1); 732 sparams->channel_num = cpu_to_le32(num_chans & 733 BRCMF_SCAN_PARAMS_COUNT_MASK); 734 for (i = 0; i < num_chans; i++) 735 sparams->channel_list[i] = cpu_to_le16(chanspecs[i]); 736 737 /* set the escan specific parameters */ 738 p2p_params->eparams.version = cpu_to_le32(BRCMF_ESCAN_REQ_VERSION); 739 p2p_params->eparams.action = cpu_to_le16(WL_ESCAN_ACTION_START); 740 p2p_params->eparams.sync_id = cpu_to_le16(0x1234); 741 /* perform p2p scan on primary device */ 742 ret = brcmf_fil_bsscfg_data_set(vif->ifp, "p2p_scan", memblk, memsize); 743 if (!ret) 744 set_bit(BRCMF_SCAN_STATUS_BUSY, &p2p->cfg->scan_status); 745 exit: 746 kfree(memblk); 747 return ret; 748 } 749 750 /** 751 * brcmf_p2p_run_escan() - escan callback for peer-to-peer. 752 * 753 * @cfg: driver private data for cfg80211 interface. 754 * @ndev: net device for which scan is requested. 755 * @request: scan request from cfg80211. 756 * @action: scan action. 757 * 758 * Determines the P2P discovery state based to scan request parameters and 759 * validates the channels in the request. 760 */ 761 static s32 brcmf_p2p_run_escan(struct brcmf_cfg80211_info *cfg, 762 struct brcmf_if *ifp, 763 struct cfg80211_scan_request *request) 764 { 765 struct brcmf_p2p_info *p2p = &cfg->p2p; 766 struct brcmf_pub *drvr = cfg->pub; 767 s32 err = 0; 768 s32 search_state = WL_P2P_DISC_ST_SCAN; 769 struct brcmf_cfg80211_vif *vif; 770 struct net_device *dev = NULL; 771 int i, num_nodfs = 0; 772 u16 *chanspecs; 773 774 brcmf_dbg(TRACE, "enter\n"); 775 776 if (!request) { 777 err = -EINVAL; 778 goto exit; 779 } 780 781 if (request->n_channels) { 782 chanspecs = kcalloc(request->n_channels, sizeof(*chanspecs), 783 GFP_KERNEL); 784 if (!chanspecs) { 785 err = -ENOMEM; 786 goto exit; 787 } 788 vif = p2p->bss_idx[P2PAPI_BSSCFG_CONNECTION].vif; 789 if (vif) 790 dev = vif->wdev.netdev; 791 if (request->n_channels == 3 && 792 request->channels[0]->hw_value == SOCIAL_CHAN_1 && 793 request->channels[1]->hw_value == SOCIAL_CHAN_2 && 794 request->channels[2]->hw_value == SOCIAL_CHAN_3) { 795 /* SOCIAL CHANNELS 1, 6, 11 */ 796 search_state = WL_P2P_DISC_ST_SEARCH; 797 brcmf_dbg(INFO, "P2P SEARCH PHASE START\n"); 798 } else if (dev != NULL && 799 vif->wdev.iftype == NL80211_IFTYPE_P2P_GO) { 800 /* If you are already a GO, then do SEARCH only */ 801 brcmf_dbg(INFO, "Already a GO. Do SEARCH Only\n"); 802 search_state = WL_P2P_DISC_ST_SEARCH; 803 } else { 804 brcmf_dbg(INFO, "P2P SCAN STATE START\n"); 805 } 806 807 /* 808 * no P2P scanning on passive or DFS channels. 809 */ 810 for (i = 0; i < request->n_channels; i++) { 811 struct ieee80211_channel *chan = request->channels[i]; 812 813 if (chan->flags & (IEEE80211_CHAN_RADAR | 814 IEEE80211_CHAN_NO_IR)) 815 continue; 816 817 chanspecs[i] = channel_to_chanspec(&p2p->cfg->d11inf, 818 chan); 819 brcmf_dbg(INFO, "%d: chan=%d, channel spec=%x\n", 820 num_nodfs, chan->hw_value, chanspecs[i]); 821 num_nodfs++; 822 } 823 err = brcmf_p2p_escan(p2p, num_nodfs, chanspecs, search_state, 824 P2PAPI_BSSCFG_DEVICE); 825 kfree(chanspecs); 826 } 827 exit: 828 if (err) 829 bphy_err(drvr, "error (%d)\n", err); 830 return err; 831 } 832 833 834 /** 835 * brcmf_p2p_find_listen_channel() - find listen channel in ie string. 836 * 837 * @ie: string of information elements. 838 * @ie_len: length of string. 839 * 840 * Scan ie for p2p ie and look for attribute 6 channel. If available determine 841 * channel and return it. 842 */ 843 static s32 brcmf_p2p_find_listen_channel(const u8 *ie, u32 ie_len) 844 { 845 u8 channel_ie[5]; 846 s32 listen_channel; 847 s32 err; 848 849 err = cfg80211_get_p2p_attr(ie, ie_len, 850 IEEE80211_P2P_ATTR_LISTEN_CHANNEL, 851 channel_ie, sizeof(channel_ie)); 852 if (err < 0) 853 return err; 854 855 /* listen channel subel length format: */ 856 /* 3(country) + 1(op. class) + 1(chan num) */ 857 listen_channel = (s32)channel_ie[3 + 1]; 858 859 if (listen_channel == SOCIAL_CHAN_1 || 860 listen_channel == SOCIAL_CHAN_2 || 861 listen_channel == SOCIAL_CHAN_3) { 862 brcmf_dbg(INFO, "Found my Listen Channel %d\n", listen_channel); 863 return listen_channel; 864 } 865 866 return -EPERM; 867 } 868 869 870 /** 871 * brcmf_p2p_scan_prep() - prepare scan based on request. 872 * 873 * @wiphy: wiphy device. 874 * @request: scan request from cfg80211. 875 * @vif: vif on which scan request is to be executed. 876 * 877 * Prepare the scan appropriately for type of scan requested. Overrides the 878 * escan .run() callback for peer-to-peer scanning. 879 */ 880 int brcmf_p2p_scan_prep(struct wiphy *wiphy, 881 struct cfg80211_scan_request *request, 882 struct brcmf_cfg80211_vif *vif) 883 { 884 struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy); 885 struct brcmf_p2p_info *p2p = &cfg->p2p; 886 int err; 887 888 if (brcmf_p2p_scan_is_p2p_request(request)) { 889 /* find my listen channel */ 890 err = brcmf_p2p_find_listen_channel(request->ie, 891 request->ie_len); 892 if (err < 0) 893 return err; 894 895 p2p->afx_hdl.my_listen_chan = err; 896 897 clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status); 898 brcmf_dbg(INFO, "P2P: GO_NEG_PHASE status cleared\n"); 899 900 err = brcmf_p2p_enable_discovery(p2p); 901 if (err) 902 return err; 903 904 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif; 905 906 /* override .run_escan() callback. */ 907 cfg->escan_info.run = brcmf_p2p_run_escan; 908 } 909 return 0; 910 } 911 912 913 /** 914 * brcmf_p2p_discover_listen() - set firmware to discover listen state. 915 * 916 * @p2p: p2p device. 917 * @channel: channel nr for discover listen. 918 * @duration: time in ms to stay on channel. 919 * 920 */ 921 static s32 922 brcmf_p2p_discover_listen(struct brcmf_p2p_info *p2p, u16 channel, u32 duration) 923 { 924 struct brcmf_pub *drvr = p2p->cfg->pub; 925 struct brcmf_cfg80211_vif *vif; 926 struct brcmu_chan ch; 927 s32 err = 0; 928 929 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif; 930 if (!vif) { 931 bphy_err(drvr, "Discovery is not set, so we have nothing to do\n"); 932 err = -EPERM; 933 goto exit; 934 } 935 936 if (test_bit(BRCMF_P2P_STATUS_DISCOVER_LISTEN, &p2p->status)) { 937 bphy_err(drvr, "Previous LISTEN is not completed yet\n"); 938 /* WAR: prevent cookie mismatch in wpa_supplicant return OK */ 939 goto exit; 940 } 941 942 ch.chnum = channel; 943 ch.bw = BRCMU_CHAN_BW_20; 944 p2p->cfg->d11inf.encchspec(&ch); 945 err = brcmf_p2p_set_discover_state(vif->ifp, WL_P2P_DISC_ST_LISTEN, 946 ch.chspec, (u16)duration); 947 if (!err) { 948 set_bit(BRCMF_P2P_STATUS_DISCOVER_LISTEN, &p2p->status); 949 p2p->remain_on_channel_cookie++; 950 } 951 exit: 952 return err; 953 } 954 955 956 /** 957 * brcmf_p2p_remain_on_channel() - put device on channel and stay there. 958 * 959 * @wiphy: wiphy device. 960 * @channel: channel to stay on. 961 * @duration: time in ms to remain on channel. 962 * 963 */ 964 int brcmf_p2p_remain_on_channel(struct wiphy *wiphy, struct wireless_dev *wdev, 965 struct ieee80211_channel *channel, 966 unsigned int duration, u64 *cookie) 967 { 968 struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy); 969 struct brcmf_p2p_info *p2p = &cfg->p2p; 970 s32 err; 971 u16 channel_nr; 972 973 channel_nr = ieee80211_frequency_to_channel(channel->center_freq); 974 brcmf_dbg(TRACE, "Enter, channel: %d, duration ms (%d)\n", channel_nr, 975 duration); 976 977 err = brcmf_p2p_enable_discovery(p2p); 978 if (err) 979 goto exit; 980 err = brcmf_p2p_discover_listen(p2p, channel_nr, duration); 981 if (err) 982 goto exit; 983 984 memcpy(&p2p->remain_on_channel, channel, sizeof(*channel)); 985 *cookie = p2p->remain_on_channel_cookie; 986 cfg80211_ready_on_channel(wdev, *cookie, channel, duration, GFP_KERNEL); 987 988 exit: 989 return err; 990 } 991 992 993 /** 994 * brcmf_p2p_notify_listen_complete() - p2p listen has completed. 995 * 996 * @ifp: interfac control. 997 * @e: event message. Not used, to make it usable for fweh event dispatcher. 998 * @data: payload of message. Not used. 999 * 1000 */ 1001 int brcmf_p2p_notify_listen_complete(struct brcmf_if *ifp, 1002 const struct brcmf_event_msg *e, 1003 void *data) 1004 { 1005 struct brcmf_cfg80211_info *cfg = ifp->drvr->config; 1006 struct brcmf_p2p_info *p2p = &cfg->p2p; 1007 1008 brcmf_dbg(TRACE, "Enter\n"); 1009 if (test_and_clear_bit(BRCMF_P2P_STATUS_DISCOVER_LISTEN, 1010 &p2p->status)) { 1011 if (test_and_clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_AF_LISTEN, 1012 &p2p->status)) { 1013 clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, 1014 &p2p->status); 1015 brcmf_dbg(INFO, "Listen DONE, wake up wait_next_af\n"); 1016 complete(&p2p->wait_next_af); 1017 } 1018 1019 cfg80211_remain_on_channel_expired(&ifp->vif->wdev, 1020 p2p->remain_on_channel_cookie, 1021 &p2p->remain_on_channel, 1022 GFP_KERNEL); 1023 } 1024 return 0; 1025 } 1026 1027 1028 /** 1029 * brcmf_p2p_cancel_remain_on_channel() - cancel p2p listen state. 1030 * 1031 * @ifp: interfac control. 1032 * 1033 */ 1034 void brcmf_p2p_cancel_remain_on_channel(struct brcmf_if *ifp) 1035 { 1036 if (!ifp) 1037 return; 1038 brcmf_p2p_set_discover_state(ifp, WL_P2P_DISC_ST_SCAN, 0, 0); 1039 brcmf_p2p_notify_listen_complete(ifp, NULL, NULL); 1040 } 1041 1042 1043 /** 1044 * brcmf_p2p_act_frm_search() - search function for action frame. 1045 * 1046 * @p2p: p2p device. 1047 * channel: channel on which action frame is to be trasmitted. 1048 * 1049 * search function to reach at common channel to send action frame. When 1050 * channel is 0 then all social channels will be used to send af 1051 */ 1052 static s32 brcmf_p2p_act_frm_search(struct brcmf_p2p_info *p2p, u16 channel) 1053 { 1054 struct brcmf_pub *drvr = p2p->cfg->pub; 1055 s32 err; 1056 u32 channel_cnt; 1057 u16 *default_chan_list; 1058 u32 i; 1059 struct brcmu_chan ch; 1060 1061 brcmf_dbg(TRACE, "Enter\n"); 1062 1063 if (channel) 1064 channel_cnt = AF_PEER_SEARCH_CNT; 1065 else 1066 channel_cnt = SOCIAL_CHAN_CNT; 1067 default_chan_list = kcalloc(channel_cnt, sizeof(*default_chan_list), 1068 GFP_KERNEL); 1069 if (default_chan_list == NULL) { 1070 bphy_err(drvr, "channel list allocation failed\n"); 1071 err = -ENOMEM; 1072 goto exit; 1073 } 1074 ch.bw = BRCMU_CHAN_BW_20; 1075 if (channel) { 1076 ch.chnum = channel; 1077 p2p->cfg->d11inf.encchspec(&ch); 1078 /* insert same channel to the chan_list */ 1079 for (i = 0; i < channel_cnt; i++) 1080 default_chan_list[i] = ch.chspec; 1081 } else { 1082 ch.chnum = SOCIAL_CHAN_1; 1083 p2p->cfg->d11inf.encchspec(&ch); 1084 default_chan_list[0] = ch.chspec; 1085 ch.chnum = SOCIAL_CHAN_2; 1086 p2p->cfg->d11inf.encchspec(&ch); 1087 default_chan_list[1] = ch.chspec; 1088 ch.chnum = SOCIAL_CHAN_3; 1089 p2p->cfg->d11inf.encchspec(&ch); 1090 default_chan_list[2] = ch.chspec; 1091 } 1092 err = brcmf_p2p_escan(p2p, channel_cnt, default_chan_list, 1093 WL_P2P_DISC_ST_SEARCH, P2PAPI_BSSCFG_DEVICE); 1094 kfree(default_chan_list); 1095 exit: 1096 return err; 1097 } 1098 1099 1100 /** 1101 * brcmf_p2p_afx_handler() - afx worker thread. 1102 * 1103 * @work: 1104 * 1105 */ 1106 static void brcmf_p2p_afx_handler(struct work_struct *work) 1107 { 1108 struct afx_hdl *afx_hdl = container_of(work, struct afx_hdl, afx_work); 1109 struct brcmf_p2p_info *p2p = container_of(afx_hdl, 1110 struct brcmf_p2p_info, 1111 afx_hdl); 1112 struct brcmf_pub *drvr = p2p->cfg->pub; 1113 s32 err; 1114 1115 if (!afx_hdl->is_active) 1116 return; 1117 1118 if (afx_hdl->is_listen && afx_hdl->my_listen_chan) 1119 /* 100ms ~ 300ms */ 1120 err = brcmf_p2p_discover_listen(p2p, afx_hdl->my_listen_chan, 1121 100 * (1 + prandom_u32() % 3)); 1122 else 1123 err = brcmf_p2p_act_frm_search(p2p, afx_hdl->peer_listen_chan); 1124 1125 if (err) { 1126 bphy_err(drvr, "ERROR occurred! value is (%d)\n", err); 1127 if (test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, 1128 &p2p->status)) 1129 complete(&afx_hdl->act_frm_scan); 1130 } 1131 } 1132 1133 1134 /** 1135 * brcmf_p2p_af_searching_channel() - search channel. 1136 * 1137 * @p2p: p2p device info struct. 1138 * 1139 */ 1140 static s32 brcmf_p2p_af_searching_channel(struct brcmf_p2p_info *p2p) 1141 { 1142 struct afx_hdl *afx_hdl = &p2p->afx_hdl; 1143 struct brcmf_cfg80211_vif *pri_vif; 1144 s32 retry; 1145 1146 brcmf_dbg(TRACE, "Enter\n"); 1147 1148 pri_vif = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif; 1149 1150 reinit_completion(&afx_hdl->act_frm_scan); 1151 set_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status); 1152 afx_hdl->is_active = true; 1153 afx_hdl->peer_chan = P2P_INVALID_CHANNEL; 1154 1155 /* Loop to wait until we find a peer's channel or the 1156 * pending action frame tx is cancelled. 1157 */ 1158 retry = 0; 1159 while ((retry < P2P_CHANNEL_SYNC_RETRY) && 1160 (afx_hdl->peer_chan == P2P_INVALID_CHANNEL)) { 1161 afx_hdl->is_listen = false; 1162 brcmf_dbg(TRACE, "Scheduling action frame for sending.. (%d)\n", 1163 retry); 1164 /* search peer on peer's listen channel */ 1165 schedule_work(&afx_hdl->afx_work); 1166 wait_for_completion_timeout(&afx_hdl->act_frm_scan, 1167 P2P_AF_FRM_SCAN_MAX_WAIT); 1168 if ((afx_hdl->peer_chan != P2P_INVALID_CHANNEL) || 1169 (!test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, 1170 &p2p->status))) 1171 break; 1172 1173 if (afx_hdl->my_listen_chan) { 1174 brcmf_dbg(TRACE, "Scheduling listen peer, channel=%d\n", 1175 afx_hdl->my_listen_chan); 1176 /* listen on my listen channel */ 1177 afx_hdl->is_listen = true; 1178 schedule_work(&afx_hdl->afx_work); 1179 wait_for_completion_timeout(&afx_hdl->act_frm_scan, 1180 P2P_AF_FRM_SCAN_MAX_WAIT); 1181 } 1182 if ((afx_hdl->peer_chan != P2P_INVALID_CHANNEL) || 1183 (!test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, 1184 &p2p->status))) 1185 break; 1186 retry++; 1187 1188 /* if sta is connected or connecting, sleep for a while before 1189 * retry af tx or finding a peer 1190 */ 1191 if (test_bit(BRCMF_VIF_STATUS_CONNECTED, &pri_vif->sme_state) || 1192 test_bit(BRCMF_VIF_STATUS_CONNECTING, &pri_vif->sme_state)) 1193 msleep(P2P_DEFAULT_SLEEP_TIME_VSDB); 1194 } 1195 1196 brcmf_dbg(TRACE, "Completed search/listen peer_chan=%d\n", 1197 afx_hdl->peer_chan); 1198 afx_hdl->is_active = false; 1199 1200 clear_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status); 1201 1202 return afx_hdl->peer_chan; 1203 } 1204 1205 1206 /** 1207 * brcmf_p2p_scan_finding_common_channel() - was escan used for finding channel 1208 * 1209 * @cfg: common configuration struct. 1210 * @bi: bss info struct, result from scan. 1211 * 1212 */ 1213 bool brcmf_p2p_scan_finding_common_channel(struct brcmf_cfg80211_info *cfg, 1214 struct brcmf_bss_info_le *bi) 1215 1216 { 1217 struct brcmf_p2p_info *p2p = &cfg->p2p; 1218 struct afx_hdl *afx_hdl = &p2p->afx_hdl; 1219 struct brcmu_chan ch; 1220 u8 *ie; 1221 s32 err; 1222 u8 p2p_dev_addr[ETH_ALEN]; 1223 1224 if (!test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status)) 1225 return false; 1226 1227 if (bi == NULL) { 1228 brcmf_dbg(TRACE, "ACTION FRAME SCAN Done\n"); 1229 if (afx_hdl->peer_chan == P2P_INVALID_CHANNEL) 1230 complete(&afx_hdl->act_frm_scan); 1231 return true; 1232 } 1233 1234 ie = ((u8 *)bi) + le16_to_cpu(bi->ie_offset); 1235 memset(p2p_dev_addr, 0, sizeof(p2p_dev_addr)); 1236 err = cfg80211_get_p2p_attr(ie, le32_to_cpu(bi->ie_length), 1237 IEEE80211_P2P_ATTR_DEVICE_INFO, 1238 p2p_dev_addr, sizeof(p2p_dev_addr)); 1239 if (err < 0) 1240 err = cfg80211_get_p2p_attr(ie, le32_to_cpu(bi->ie_length), 1241 IEEE80211_P2P_ATTR_DEVICE_ID, 1242 p2p_dev_addr, sizeof(p2p_dev_addr)); 1243 if ((err >= 0) && 1244 (ether_addr_equal(p2p_dev_addr, afx_hdl->tx_dst_addr))) { 1245 if (!bi->ctl_ch) { 1246 ch.chspec = le16_to_cpu(bi->chanspec); 1247 cfg->d11inf.decchspec(&ch); 1248 bi->ctl_ch = ch.control_ch_num; 1249 } 1250 afx_hdl->peer_chan = bi->ctl_ch; 1251 brcmf_dbg(TRACE, "ACTION FRAME SCAN : Peer %pM found, channel : %d\n", 1252 afx_hdl->tx_dst_addr, afx_hdl->peer_chan); 1253 complete(&afx_hdl->act_frm_scan); 1254 } 1255 return true; 1256 } 1257 1258 /** 1259 * brcmf_p2p_stop_wait_next_action_frame() - finish scan if af tx complete. 1260 * 1261 * @cfg: common configuration struct. 1262 * 1263 */ 1264 static void 1265 brcmf_p2p_stop_wait_next_action_frame(struct brcmf_cfg80211_info *cfg) 1266 { 1267 struct brcmf_p2p_info *p2p = &cfg->p2p; 1268 struct brcmf_if *ifp = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->ifp; 1269 1270 if (test_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status) && 1271 (test_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status) || 1272 test_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status))) { 1273 brcmf_dbg(TRACE, "*** Wake UP ** abort actframe iovar\n"); 1274 /* if channel is not zero, "actfame" uses off channel scan. 1275 * So abort scan for off channel completion. 1276 */ 1277 if (p2p->af_sent_channel) 1278 brcmf_notify_escan_complete(cfg, ifp, true, true); 1279 } else if (test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_AF_LISTEN, 1280 &p2p->status)) { 1281 brcmf_dbg(TRACE, "*** Wake UP ** abort listen for next af frame\n"); 1282 /* So abort scan to cancel listen */ 1283 brcmf_notify_escan_complete(cfg, ifp, true, true); 1284 } 1285 } 1286 1287 1288 /** 1289 * brcmf_p2p_gon_req_collision() - Check if go negotiaton collission 1290 * 1291 * @p2p: p2p device info struct. 1292 * 1293 * return true if recevied action frame is to be dropped. 1294 */ 1295 static bool 1296 brcmf_p2p_gon_req_collision(struct brcmf_p2p_info *p2p, u8 *mac) 1297 { 1298 struct brcmf_cfg80211_info *cfg = p2p->cfg; 1299 struct brcmf_if *ifp; 1300 1301 brcmf_dbg(TRACE, "Enter\n"); 1302 1303 if (!test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status) || 1304 !p2p->gon_req_action) 1305 return false; 1306 1307 brcmf_dbg(TRACE, "GO Negotiation Request COLLISION !!!\n"); 1308 /* if sa(peer) addr is less than da(my) addr, then this device 1309 * process peer's gon request and block to send gon req. 1310 * if not (sa addr > da addr), 1311 * this device will process gon request and drop gon req of peer. 1312 */ 1313 ifp = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif->ifp; 1314 if (memcmp(mac, ifp->mac_addr, ETH_ALEN) < 0) { 1315 brcmf_dbg(INFO, "Block transmit gon req !!!\n"); 1316 p2p->block_gon_req_tx = true; 1317 /* if we are finding a common channel for sending af, 1318 * do not scan more to block to send current gon req 1319 */ 1320 if (test_and_clear_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, 1321 &p2p->status)) 1322 complete(&p2p->afx_hdl.act_frm_scan); 1323 if (test_and_clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, 1324 &p2p->status)) 1325 brcmf_p2p_stop_wait_next_action_frame(cfg); 1326 return false; 1327 } 1328 1329 /* drop gon request of peer to process gon request by this device. */ 1330 brcmf_dbg(INFO, "Drop received gon req !!!\n"); 1331 1332 return true; 1333 } 1334 1335 1336 /** 1337 * brcmf_p2p_notify_action_frame_rx() - received action frame. 1338 * 1339 * @ifp: interfac control. 1340 * @e: event message. Not used, to make it usable for fweh event dispatcher. 1341 * @data: payload of message, containing action frame data. 1342 * 1343 */ 1344 int brcmf_p2p_notify_action_frame_rx(struct brcmf_if *ifp, 1345 const struct brcmf_event_msg *e, 1346 void *data) 1347 { 1348 struct brcmf_pub *drvr = ifp->drvr; 1349 struct brcmf_cfg80211_info *cfg = drvr->config; 1350 struct brcmf_p2p_info *p2p = &cfg->p2p; 1351 struct afx_hdl *afx_hdl = &p2p->afx_hdl; 1352 struct wireless_dev *wdev; 1353 u32 mgmt_frame_len = e->datalen - sizeof(struct brcmf_rx_mgmt_data); 1354 struct brcmf_rx_mgmt_data *rxframe = (struct brcmf_rx_mgmt_data *)data; 1355 u8 *frame = (u8 *)(rxframe + 1); 1356 struct brcmf_p2p_pub_act_frame *act_frm; 1357 struct brcmf_p2psd_gas_pub_act_frame *sd_act_frm; 1358 struct brcmu_chan ch; 1359 struct ieee80211_mgmt *mgmt_frame; 1360 s32 freq; 1361 u16 mgmt_type; 1362 u8 action; 1363 1364 if (e->datalen < sizeof(*rxframe)) { 1365 brcmf_dbg(SCAN, "Event data to small. Ignore\n"); 1366 return 0; 1367 } 1368 1369 ch.chspec = be16_to_cpu(rxframe->chanspec); 1370 cfg->d11inf.decchspec(&ch); 1371 /* Check if wpa_supplicant has registered for this frame */ 1372 brcmf_dbg(INFO, "ifp->vif->mgmt_rx_reg %04x\n", ifp->vif->mgmt_rx_reg); 1373 mgmt_type = (IEEE80211_STYPE_ACTION & IEEE80211_FCTL_STYPE) >> 4; 1374 if ((ifp->vif->mgmt_rx_reg & BIT(mgmt_type)) == 0) 1375 return 0; 1376 1377 brcmf_p2p_print_actframe(false, frame, mgmt_frame_len); 1378 1379 action = P2P_PAF_SUBTYPE_INVALID; 1380 if (brcmf_p2p_is_pub_action(frame, mgmt_frame_len)) { 1381 act_frm = (struct brcmf_p2p_pub_act_frame *)frame; 1382 action = act_frm->subtype; 1383 if ((action == P2P_PAF_GON_REQ) && 1384 (brcmf_p2p_gon_req_collision(p2p, (u8 *)e->addr))) { 1385 if (test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, 1386 &p2p->status) && 1387 (ether_addr_equal(afx_hdl->tx_dst_addr, e->addr))) { 1388 afx_hdl->peer_chan = ch.control_ch_num; 1389 brcmf_dbg(INFO, "GON request: Peer found, channel=%d\n", 1390 afx_hdl->peer_chan); 1391 complete(&afx_hdl->act_frm_scan); 1392 } 1393 return 0; 1394 } 1395 /* After complete GO Negotiation, roll back to mpc mode */ 1396 if ((action == P2P_PAF_GON_CONF) || 1397 (action == P2P_PAF_PROVDIS_RSP)) 1398 brcmf_set_mpc(ifp, 1); 1399 if (action == P2P_PAF_GON_CONF) { 1400 brcmf_dbg(TRACE, "P2P: GO_NEG_PHASE status cleared\n"); 1401 clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status); 1402 } 1403 } else if (brcmf_p2p_is_gas_action(frame, mgmt_frame_len)) { 1404 sd_act_frm = (struct brcmf_p2psd_gas_pub_act_frame *)frame; 1405 action = sd_act_frm->action; 1406 } 1407 1408 if (test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status) && 1409 (p2p->next_af_subtype == action)) { 1410 brcmf_dbg(TRACE, "We got a right next frame! (%d)\n", action); 1411 clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, 1412 &p2p->status); 1413 /* Stop waiting for next AF. */ 1414 brcmf_p2p_stop_wait_next_action_frame(cfg); 1415 } 1416 1417 mgmt_frame = kzalloc(offsetof(struct ieee80211_mgmt, u) + 1418 mgmt_frame_len, GFP_KERNEL); 1419 if (!mgmt_frame) { 1420 bphy_err(drvr, "No memory available for action frame\n"); 1421 return -ENOMEM; 1422 } 1423 memcpy(mgmt_frame->da, ifp->mac_addr, ETH_ALEN); 1424 brcmf_fil_cmd_data_get(ifp, BRCMF_C_GET_BSSID, mgmt_frame->bssid, 1425 ETH_ALEN); 1426 memcpy(mgmt_frame->sa, e->addr, ETH_ALEN); 1427 mgmt_frame->frame_control = cpu_to_le16(IEEE80211_STYPE_ACTION); 1428 memcpy(&mgmt_frame->u, frame, mgmt_frame_len); 1429 mgmt_frame_len += offsetof(struct ieee80211_mgmt, u); 1430 1431 freq = ieee80211_channel_to_frequency(ch.control_ch_num, 1432 ch.band == BRCMU_CHAN_BAND_2G ? 1433 NL80211_BAND_2GHZ : 1434 NL80211_BAND_5GHZ); 1435 1436 wdev = &ifp->vif->wdev; 1437 cfg80211_rx_mgmt(wdev, freq, 0, (u8 *)mgmt_frame, mgmt_frame_len, 0); 1438 1439 kfree(mgmt_frame); 1440 return 0; 1441 } 1442 1443 1444 /** 1445 * brcmf_p2p_notify_action_tx_complete() - transmit action frame complete 1446 * 1447 * @ifp: interfac control. 1448 * @e: event message. Not used, to make it usable for fweh event dispatcher. 1449 * @data: not used. 1450 * 1451 */ 1452 int brcmf_p2p_notify_action_tx_complete(struct brcmf_if *ifp, 1453 const struct brcmf_event_msg *e, 1454 void *data) 1455 { 1456 struct brcmf_cfg80211_info *cfg = ifp->drvr->config; 1457 struct brcmf_p2p_info *p2p = &cfg->p2p; 1458 1459 brcmf_dbg(INFO, "Enter: event %s, status=%d\n", 1460 e->event_code == BRCMF_E_ACTION_FRAME_OFF_CHAN_COMPLETE ? 1461 "ACTION_FRAME_OFF_CHAN_COMPLETE" : "ACTION_FRAME_COMPLETE", 1462 e->status); 1463 1464 if (!test_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status)) 1465 return 0; 1466 1467 if (e->event_code == BRCMF_E_ACTION_FRAME_COMPLETE) { 1468 if (e->status == BRCMF_E_STATUS_SUCCESS) { 1469 set_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, 1470 &p2p->status); 1471 if (!p2p->wait_for_offchan_complete) 1472 complete(&p2p->send_af_done); 1473 } else { 1474 set_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status); 1475 /* If there is no ack, we don't need to wait for 1476 * WLC_E_ACTION_FRAME_OFFCHAN_COMPLETE event 1477 */ 1478 brcmf_p2p_stop_wait_next_action_frame(cfg); 1479 } 1480 1481 } else { 1482 complete(&p2p->send_af_done); 1483 } 1484 return 0; 1485 } 1486 1487 1488 /** 1489 * brcmf_p2p_tx_action_frame() - send action frame over fil. 1490 * 1491 * @p2p: p2p info struct for vif. 1492 * @af_params: action frame data/info. 1493 * 1494 * Send an action frame immediately without doing channel synchronization. 1495 * 1496 * This function waits for a completion event before returning. 1497 * The WLC_E_ACTION_FRAME_COMPLETE event will be received when the action 1498 * frame is transmitted. 1499 */ 1500 static s32 brcmf_p2p_tx_action_frame(struct brcmf_p2p_info *p2p, 1501 struct brcmf_fil_af_params_le *af_params) 1502 { 1503 struct brcmf_pub *drvr = p2p->cfg->pub; 1504 struct brcmf_cfg80211_vif *vif; 1505 s32 err = 0; 1506 s32 timeout = 0; 1507 1508 brcmf_dbg(TRACE, "Enter\n"); 1509 1510 reinit_completion(&p2p->send_af_done); 1511 clear_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status); 1512 clear_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status); 1513 1514 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif; 1515 err = brcmf_fil_bsscfg_data_set(vif->ifp, "actframe", af_params, 1516 sizeof(*af_params)); 1517 if (err) { 1518 bphy_err(drvr, " sending action frame has failed\n"); 1519 goto exit; 1520 } 1521 1522 p2p->af_sent_channel = le32_to_cpu(af_params->channel); 1523 p2p->af_tx_sent_jiffies = jiffies; 1524 1525 if (test_bit(BRCMF_P2P_STATUS_DISCOVER_LISTEN, &p2p->status) && 1526 p2p->af_sent_channel == 1527 ieee80211_frequency_to_channel(p2p->remain_on_channel.center_freq)) 1528 p2p->wait_for_offchan_complete = false; 1529 else 1530 p2p->wait_for_offchan_complete = true; 1531 1532 brcmf_dbg(TRACE, "Waiting for %s tx completion event\n", 1533 (p2p->wait_for_offchan_complete) ? 1534 "off-channel" : "on-channel"); 1535 1536 timeout = wait_for_completion_timeout(&p2p->send_af_done, 1537 P2P_AF_MAX_WAIT_TIME); 1538 1539 if (test_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status)) { 1540 brcmf_dbg(TRACE, "TX action frame operation is success\n"); 1541 } else { 1542 err = -EIO; 1543 brcmf_dbg(TRACE, "TX action frame operation has failed\n"); 1544 } 1545 /* clear status bit for action tx */ 1546 clear_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status); 1547 clear_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status); 1548 1549 exit: 1550 return err; 1551 } 1552 1553 1554 /** 1555 * brcmf_p2p_pub_af_tx() - public action frame tx routine. 1556 * 1557 * @cfg: driver private data for cfg80211 interface. 1558 * @af_params: action frame data/info. 1559 * @config_af_params: configuration data for action frame. 1560 * 1561 * routine which transmits ation frame public type. 1562 */ 1563 static s32 brcmf_p2p_pub_af_tx(struct brcmf_cfg80211_info *cfg, 1564 struct brcmf_fil_af_params_le *af_params, 1565 struct brcmf_config_af_params *config_af_params) 1566 { 1567 struct brcmf_p2p_info *p2p = &cfg->p2p; 1568 struct brcmf_pub *drvr = cfg->pub; 1569 struct brcmf_fil_action_frame_le *action_frame; 1570 struct brcmf_p2p_pub_act_frame *act_frm; 1571 s32 err = 0; 1572 u16 ie_len; 1573 1574 action_frame = &af_params->action_frame; 1575 act_frm = (struct brcmf_p2p_pub_act_frame *)(action_frame->data); 1576 1577 config_af_params->extra_listen = true; 1578 1579 switch (act_frm->subtype) { 1580 case P2P_PAF_GON_REQ: 1581 brcmf_dbg(TRACE, "P2P: GO_NEG_PHASE status set\n"); 1582 set_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status); 1583 config_af_params->mpc_onoff = 0; 1584 config_af_params->search_channel = true; 1585 p2p->next_af_subtype = act_frm->subtype + 1; 1586 p2p->gon_req_action = true; 1587 /* increase dwell time to wait for RESP frame */ 1588 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME); 1589 break; 1590 case P2P_PAF_GON_RSP: 1591 p2p->next_af_subtype = act_frm->subtype + 1; 1592 /* increase dwell time to wait for CONF frame */ 1593 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME); 1594 break; 1595 case P2P_PAF_GON_CONF: 1596 /* If we reached till GO Neg confirmation reset the filter */ 1597 brcmf_dbg(TRACE, "P2P: GO_NEG_PHASE status cleared\n"); 1598 clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status); 1599 /* turn on mpc again if go nego is done */ 1600 config_af_params->mpc_onoff = 1; 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_INVITE_REQ: 1606 config_af_params->search_channel = true; 1607 p2p->next_af_subtype = act_frm->subtype + 1; 1608 /* increase dwell time */ 1609 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME); 1610 break; 1611 case P2P_PAF_INVITE_RSP: 1612 /* minimize dwell time */ 1613 af_params->dwell_time = cpu_to_le32(P2P_AF_MIN_DWELL_TIME); 1614 config_af_params->extra_listen = false; 1615 break; 1616 case P2P_PAF_DEVDIS_REQ: 1617 config_af_params->search_channel = true; 1618 p2p->next_af_subtype = act_frm->subtype + 1; 1619 /* maximize dwell time to wait for RESP frame */ 1620 af_params->dwell_time = cpu_to_le32(P2P_AF_LONG_DWELL_TIME); 1621 break; 1622 case P2P_PAF_DEVDIS_RSP: 1623 /* minimize dwell time */ 1624 af_params->dwell_time = cpu_to_le32(P2P_AF_MIN_DWELL_TIME); 1625 config_af_params->extra_listen = false; 1626 break; 1627 case P2P_PAF_PROVDIS_REQ: 1628 ie_len = le16_to_cpu(action_frame->len) - 1629 offsetof(struct brcmf_p2p_pub_act_frame, elts); 1630 if (cfg80211_get_p2p_attr(&act_frm->elts[0], ie_len, 1631 IEEE80211_P2P_ATTR_GROUP_ID, 1632 NULL, 0) < 0) 1633 config_af_params->search_channel = true; 1634 config_af_params->mpc_onoff = 0; 1635 p2p->next_af_subtype = act_frm->subtype + 1; 1636 /* increase dwell time to wait for RESP frame */ 1637 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME); 1638 break; 1639 case P2P_PAF_PROVDIS_RSP: 1640 /* wpa_supplicant send go nego req right after prov disc */ 1641 p2p->next_af_subtype = P2P_PAF_GON_REQ; 1642 /* increase dwell time to MED level */ 1643 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME); 1644 config_af_params->extra_listen = false; 1645 break; 1646 default: 1647 bphy_err(drvr, "Unknown p2p pub act frame subtype: %d\n", 1648 act_frm->subtype); 1649 err = -EINVAL; 1650 } 1651 return err; 1652 } 1653 1654 /** 1655 * brcmf_p2p_send_action_frame() - send action frame . 1656 * 1657 * @cfg: driver private data for cfg80211 interface. 1658 * @ndev: net device to transmit on. 1659 * @af_params: configuration data for action frame. 1660 */ 1661 bool brcmf_p2p_send_action_frame(struct brcmf_cfg80211_info *cfg, 1662 struct net_device *ndev, 1663 struct brcmf_fil_af_params_le *af_params) 1664 { 1665 struct brcmf_p2p_info *p2p = &cfg->p2p; 1666 struct brcmf_if *ifp = netdev_priv(ndev); 1667 struct brcmf_fil_action_frame_le *action_frame; 1668 struct brcmf_config_af_params config_af_params; 1669 struct afx_hdl *afx_hdl = &p2p->afx_hdl; 1670 struct brcmf_pub *drvr = cfg->pub; 1671 u16 action_frame_len; 1672 bool ack = false; 1673 u8 category; 1674 u8 action; 1675 s32 tx_retry; 1676 s32 extra_listen_time; 1677 uint delta_ms; 1678 1679 action_frame = &af_params->action_frame; 1680 action_frame_len = le16_to_cpu(action_frame->len); 1681 1682 brcmf_p2p_print_actframe(true, action_frame->data, action_frame_len); 1683 1684 /* Add the default dwell time. Dwell time to stay off-channel */ 1685 /* to wait for a response action frame after transmitting an */ 1686 /* GO Negotiation action frame */ 1687 af_params->dwell_time = cpu_to_le32(P2P_AF_DWELL_TIME); 1688 1689 category = action_frame->data[DOT11_ACTION_CAT_OFF]; 1690 action = action_frame->data[DOT11_ACTION_ACT_OFF]; 1691 1692 /* initialize variables */ 1693 p2p->next_af_subtype = P2P_PAF_SUBTYPE_INVALID; 1694 p2p->gon_req_action = false; 1695 1696 /* config parameters */ 1697 config_af_params.mpc_onoff = -1; 1698 config_af_params.search_channel = false; 1699 config_af_params.extra_listen = false; 1700 1701 if (brcmf_p2p_is_pub_action(action_frame->data, action_frame_len)) { 1702 /* p2p public action frame process */ 1703 if (brcmf_p2p_pub_af_tx(cfg, af_params, &config_af_params)) { 1704 /* Just send unknown subtype frame with */ 1705 /* default parameters. */ 1706 bphy_err(drvr, "P2P Public action frame, unknown subtype.\n"); 1707 } 1708 } else if (brcmf_p2p_is_gas_action(action_frame->data, 1709 action_frame_len)) { 1710 /* service discovery process */ 1711 if (action == P2PSD_ACTION_ID_GAS_IREQ || 1712 action == P2PSD_ACTION_ID_GAS_CREQ) { 1713 /* configure service discovery query frame */ 1714 config_af_params.search_channel = true; 1715 1716 /* save next af suptype to cancel */ 1717 /* remaining dwell time */ 1718 p2p->next_af_subtype = action + 1; 1719 1720 af_params->dwell_time = 1721 cpu_to_le32(P2P_AF_MED_DWELL_TIME); 1722 } else if (action == P2PSD_ACTION_ID_GAS_IRESP || 1723 action == P2PSD_ACTION_ID_GAS_CRESP) { 1724 /* configure service discovery response frame */ 1725 af_params->dwell_time = 1726 cpu_to_le32(P2P_AF_MIN_DWELL_TIME); 1727 } else { 1728 bphy_err(drvr, "Unknown action type: %d\n", action); 1729 goto exit; 1730 } 1731 } else if (brcmf_p2p_is_p2p_action(action_frame->data, 1732 action_frame_len)) { 1733 /* do not configure anything. it will be */ 1734 /* sent with a default configuration */ 1735 } else { 1736 bphy_err(drvr, "Unknown Frame: category 0x%x, action 0x%x\n", 1737 category, action); 1738 return false; 1739 } 1740 1741 /* if connecting on primary iface, sleep for a while before sending 1742 * af tx for VSDB 1743 */ 1744 if (test_bit(BRCMF_VIF_STATUS_CONNECTING, 1745 &p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->sme_state)) 1746 msleep(50); 1747 1748 /* if scan is ongoing, abort current scan. */ 1749 if (test_bit(BRCMF_SCAN_STATUS_BUSY, &cfg->scan_status)) 1750 brcmf_abort_scanning(cfg); 1751 1752 memcpy(afx_hdl->tx_dst_addr, action_frame->da, ETH_ALEN); 1753 1754 /* To make sure to send successfully action frame, turn off mpc */ 1755 if (config_af_params.mpc_onoff == 0) 1756 brcmf_set_mpc(ifp, 0); 1757 1758 /* set status and destination address before sending af */ 1759 if (p2p->next_af_subtype != P2P_PAF_SUBTYPE_INVALID) { 1760 /* set status to cancel the remained dwell time in rx process */ 1761 set_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status); 1762 } 1763 1764 p2p->af_sent_channel = 0; 1765 set_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status); 1766 /* validate channel and p2p ies */ 1767 if (config_af_params.search_channel && 1768 IS_P2P_SOCIAL_CHANNEL(le32_to_cpu(af_params->channel)) && 1769 p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif->saved_ie.probe_req_ie_len) { 1770 afx_hdl = &p2p->afx_hdl; 1771 afx_hdl->peer_listen_chan = le32_to_cpu(af_params->channel); 1772 1773 if (brcmf_p2p_af_searching_channel(p2p) == 1774 P2P_INVALID_CHANNEL) { 1775 bphy_err(drvr, "Couldn't find peer's channel.\n"); 1776 goto exit; 1777 } 1778 1779 /* Abort scan even for VSDB scenarios. Scan gets aborted in 1780 * firmware but after the check of piggyback algorithm. To take 1781 * care of current piggback algo, lets abort the scan here 1782 * itself. 1783 */ 1784 brcmf_notify_escan_complete(cfg, ifp, true, true); 1785 1786 /* update channel */ 1787 af_params->channel = cpu_to_le32(afx_hdl->peer_chan); 1788 } 1789 1790 tx_retry = 0; 1791 while (!p2p->block_gon_req_tx && 1792 (ack == false) && (tx_retry < P2P_AF_TX_MAX_RETRY)) { 1793 ack = !brcmf_p2p_tx_action_frame(p2p, af_params); 1794 tx_retry++; 1795 } 1796 if (ack == false) { 1797 bphy_err(drvr, "Failed to send Action Frame(retry %d)\n", 1798 tx_retry); 1799 clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status); 1800 } 1801 1802 exit: 1803 clear_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status); 1804 1805 /* WAR: sometimes dongle does not keep the dwell time of 'actframe'. 1806 * if we coundn't get the next action response frame and dongle does 1807 * not keep the dwell time, go to listen state again to get next action 1808 * response frame. 1809 */ 1810 if (ack && config_af_params.extra_listen && !p2p->block_gon_req_tx && 1811 test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status) && 1812 p2p->af_sent_channel == afx_hdl->my_listen_chan) { 1813 delta_ms = jiffies_to_msecs(jiffies - p2p->af_tx_sent_jiffies); 1814 if (le32_to_cpu(af_params->dwell_time) > delta_ms) 1815 extra_listen_time = le32_to_cpu(af_params->dwell_time) - 1816 delta_ms; 1817 else 1818 extra_listen_time = 0; 1819 if (extra_listen_time > 50) { 1820 set_bit(BRCMF_P2P_STATUS_WAITING_NEXT_AF_LISTEN, 1821 &p2p->status); 1822 brcmf_dbg(INFO, "Wait more time! actual af time:%d, calculated extra listen:%d\n", 1823 le32_to_cpu(af_params->dwell_time), 1824 extra_listen_time); 1825 extra_listen_time += 100; 1826 if (!brcmf_p2p_discover_listen(p2p, 1827 p2p->af_sent_channel, 1828 extra_listen_time)) { 1829 unsigned long duration; 1830 1831 extra_listen_time += 100; 1832 duration = msecs_to_jiffies(extra_listen_time); 1833 wait_for_completion_timeout(&p2p->wait_next_af, 1834 duration); 1835 } 1836 clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_AF_LISTEN, 1837 &p2p->status); 1838 } 1839 } 1840 1841 if (p2p->block_gon_req_tx) { 1842 /* if ack is true, supplicant will wait more time(100ms). 1843 * so we will return it as a success to get more time . 1844 */ 1845 p2p->block_gon_req_tx = false; 1846 ack = true; 1847 } 1848 1849 clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status); 1850 /* if all done, turn mpc on again */ 1851 if (config_af_params.mpc_onoff == 1) 1852 brcmf_set_mpc(ifp, 1); 1853 1854 return ack; 1855 } 1856 1857 /** 1858 * brcmf_p2p_notify_rx_mgmt_p2p_probereq() - Event handler for p2p probe req. 1859 * 1860 * @ifp: interface pointer for which event was received. 1861 * @e: even message. 1862 * @data: payload of event message (probe request). 1863 */ 1864 s32 brcmf_p2p_notify_rx_mgmt_p2p_probereq(struct brcmf_if *ifp, 1865 const struct brcmf_event_msg *e, 1866 void *data) 1867 { 1868 struct brcmf_cfg80211_info *cfg = ifp->drvr->config; 1869 struct brcmf_p2p_info *p2p = &cfg->p2p; 1870 struct afx_hdl *afx_hdl = &p2p->afx_hdl; 1871 struct brcmf_cfg80211_vif *vif = ifp->vif; 1872 struct brcmf_rx_mgmt_data *rxframe = (struct brcmf_rx_mgmt_data *)data; 1873 struct brcmu_chan ch; 1874 u8 *mgmt_frame; 1875 u32 mgmt_frame_len; 1876 s32 freq; 1877 u16 mgmt_type; 1878 1879 brcmf_dbg(INFO, "Enter: event %d reason %d\n", e->event_code, 1880 e->reason); 1881 1882 if (e->datalen < sizeof(*rxframe)) { 1883 brcmf_dbg(SCAN, "Event data to small. Ignore\n"); 1884 return 0; 1885 } 1886 1887 ch.chspec = be16_to_cpu(rxframe->chanspec); 1888 cfg->d11inf.decchspec(&ch); 1889 1890 if (test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status) && 1891 (ether_addr_equal(afx_hdl->tx_dst_addr, e->addr))) { 1892 afx_hdl->peer_chan = ch.control_ch_num; 1893 brcmf_dbg(INFO, "PROBE REQUEST: Peer found, channel=%d\n", 1894 afx_hdl->peer_chan); 1895 complete(&afx_hdl->act_frm_scan); 1896 } 1897 1898 /* Firmware sends us two proberesponses for each idx one. At the */ 1899 /* moment anything but bsscfgidx 0 is passed up to supplicant */ 1900 if (e->bsscfgidx == 0) 1901 return 0; 1902 1903 /* Filter any P2P probe reqs arriving during the GO-NEG Phase */ 1904 if (test_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status)) { 1905 brcmf_dbg(INFO, "Filtering P2P probe_req in GO-NEG phase\n"); 1906 return 0; 1907 } 1908 1909 /* Check if wpa_supplicant has registered for this frame */ 1910 brcmf_dbg(INFO, "vif->mgmt_rx_reg %04x\n", vif->mgmt_rx_reg); 1911 mgmt_type = (IEEE80211_STYPE_PROBE_REQ & IEEE80211_FCTL_STYPE) >> 4; 1912 if ((vif->mgmt_rx_reg & BIT(mgmt_type)) == 0) 1913 return 0; 1914 1915 mgmt_frame = (u8 *)(rxframe + 1); 1916 mgmt_frame_len = e->datalen - sizeof(*rxframe); 1917 freq = ieee80211_channel_to_frequency(ch.control_ch_num, 1918 ch.band == BRCMU_CHAN_BAND_2G ? 1919 NL80211_BAND_2GHZ : 1920 NL80211_BAND_5GHZ); 1921 1922 cfg80211_rx_mgmt(&vif->wdev, freq, 0, mgmt_frame, mgmt_frame_len, 0); 1923 1924 brcmf_dbg(INFO, "mgmt_frame_len (%d) , e->datalen (%d), chanspec (%04x), freq (%d)\n", 1925 mgmt_frame_len, e->datalen, ch.chspec, freq); 1926 1927 return 0; 1928 } 1929 1930 1931 /** 1932 * brcmf_p2p_get_current_chanspec() - Get current operation channel. 1933 * 1934 * @p2p: P2P specific data. 1935 * @chanspec: chanspec to be returned. 1936 */ 1937 static void brcmf_p2p_get_current_chanspec(struct brcmf_p2p_info *p2p, 1938 u16 *chanspec) 1939 { 1940 struct brcmf_if *ifp; 1941 u8 mac_addr[ETH_ALEN]; 1942 struct brcmu_chan ch; 1943 struct brcmf_bss_info_le *bi; 1944 u8 *buf; 1945 1946 ifp = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->ifp; 1947 1948 if (brcmf_fil_cmd_data_get(ifp, BRCMF_C_GET_BSSID, mac_addr, 1949 ETH_ALEN) == 0) { 1950 buf = kzalloc(WL_BSS_INFO_MAX, GFP_KERNEL); 1951 if (buf != NULL) { 1952 *(__le32 *)buf = cpu_to_le32(WL_BSS_INFO_MAX); 1953 if (brcmf_fil_cmd_data_get(ifp, BRCMF_C_GET_BSS_INFO, 1954 buf, WL_BSS_INFO_MAX) == 0) { 1955 bi = (struct brcmf_bss_info_le *)(buf + 4); 1956 *chanspec = le16_to_cpu(bi->chanspec); 1957 kfree(buf); 1958 return; 1959 } 1960 kfree(buf); 1961 } 1962 } 1963 /* Use default channel for P2P */ 1964 ch.chnum = BRCMF_P2P_TEMP_CHAN; 1965 ch.bw = BRCMU_CHAN_BW_20; 1966 p2p->cfg->d11inf.encchspec(&ch); 1967 *chanspec = ch.chspec; 1968 } 1969 1970 /** 1971 * Change a P2P Role. 1972 * Parameters: 1973 * @mac: MAC address of the BSS to change a role 1974 * Returns 0 if success. 1975 */ 1976 int brcmf_p2p_ifchange(struct brcmf_cfg80211_info *cfg, 1977 enum brcmf_fil_p2p_if_types if_type) 1978 { 1979 struct brcmf_p2p_info *p2p = &cfg->p2p; 1980 struct brcmf_pub *drvr = cfg->pub; 1981 struct brcmf_cfg80211_vif *vif; 1982 struct brcmf_fil_p2p_if_le if_request; 1983 s32 err; 1984 u16 chanspec; 1985 1986 brcmf_dbg(TRACE, "Enter\n"); 1987 1988 vif = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif; 1989 if (!vif) { 1990 bphy_err(drvr, "vif for P2PAPI_BSSCFG_PRIMARY does not exist\n"); 1991 return -EPERM; 1992 } 1993 brcmf_notify_escan_complete(cfg, vif->ifp, true, true); 1994 vif = p2p->bss_idx[P2PAPI_BSSCFG_CONNECTION].vif; 1995 if (!vif) { 1996 bphy_err(drvr, "vif for P2PAPI_BSSCFG_CONNECTION does not exist\n"); 1997 return -EPERM; 1998 } 1999 brcmf_set_mpc(vif->ifp, 0); 2000 2001 /* In concurrency case, STA may be already associated in a particular */ 2002 /* channel. so retrieve the current channel of primary interface and */ 2003 /* then start the virtual interface on that. */ 2004 brcmf_p2p_get_current_chanspec(p2p, &chanspec); 2005 2006 if_request.type = cpu_to_le16((u16)if_type); 2007 if_request.chspec = cpu_to_le16(chanspec); 2008 memcpy(if_request.addr, p2p->int_addr, sizeof(if_request.addr)); 2009 2010 brcmf_cfg80211_arm_vif_event(cfg, vif); 2011 err = brcmf_fil_iovar_data_set(vif->ifp, "p2p_ifupd", &if_request, 2012 sizeof(if_request)); 2013 if (err) { 2014 bphy_err(drvr, "p2p_ifupd FAILED, err=%d\n", err); 2015 brcmf_cfg80211_arm_vif_event(cfg, NULL); 2016 return err; 2017 } 2018 err = brcmf_cfg80211_wait_vif_event(cfg, BRCMF_E_IF_CHANGE, 2019 BRCMF_VIF_EVENT_TIMEOUT); 2020 brcmf_cfg80211_arm_vif_event(cfg, NULL); 2021 if (!err) { 2022 bphy_err(drvr, "No BRCMF_E_IF_CHANGE event received\n"); 2023 return -EIO; 2024 } 2025 2026 err = brcmf_fil_cmd_int_set(vif->ifp, BRCMF_C_SET_SCB_TIMEOUT, 2027 BRCMF_SCB_TIMEOUT_VALUE); 2028 2029 return err; 2030 } 2031 2032 static int brcmf_p2p_request_p2p_if(struct brcmf_p2p_info *p2p, 2033 struct brcmf_if *ifp, u8 ea[ETH_ALEN], 2034 enum brcmf_fil_p2p_if_types iftype) 2035 { 2036 struct brcmf_fil_p2p_if_le if_request; 2037 int err; 2038 u16 chanspec; 2039 2040 /* we need a default channel */ 2041 brcmf_p2p_get_current_chanspec(p2p, &chanspec); 2042 2043 /* fill the firmware request */ 2044 memcpy(if_request.addr, ea, ETH_ALEN); 2045 if_request.type = cpu_to_le16((u16)iftype); 2046 if_request.chspec = cpu_to_le16(chanspec); 2047 2048 err = brcmf_fil_iovar_data_set(ifp, "p2p_ifadd", &if_request, 2049 sizeof(if_request)); 2050 2051 return err; 2052 } 2053 2054 static int brcmf_p2p_disable_p2p_if(struct brcmf_cfg80211_vif *vif) 2055 { 2056 struct brcmf_cfg80211_info *cfg = wdev_to_cfg(&vif->wdev); 2057 struct net_device *pri_ndev = cfg_to_ndev(cfg); 2058 struct brcmf_if *ifp = netdev_priv(pri_ndev); 2059 u8 *addr = vif->wdev.netdev->dev_addr; 2060 2061 return brcmf_fil_iovar_data_set(ifp, "p2p_ifdis", addr, ETH_ALEN); 2062 } 2063 2064 static int brcmf_p2p_release_p2p_if(struct brcmf_cfg80211_vif *vif) 2065 { 2066 struct brcmf_cfg80211_info *cfg = wdev_to_cfg(&vif->wdev); 2067 struct net_device *pri_ndev = cfg_to_ndev(cfg); 2068 struct brcmf_if *ifp = netdev_priv(pri_ndev); 2069 u8 *addr = vif->wdev.netdev->dev_addr; 2070 2071 return brcmf_fil_iovar_data_set(ifp, "p2p_ifdel", addr, ETH_ALEN); 2072 } 2073 2074 /** 2075 * brcmf_p2p_create_p2pdev() - create a P2P_DEVICE virtual interface. 2076 * 2077 * @p2p: P2P specific data. 2078 * @wiphy: wiphy device of new interface. 2079 * @addr: mac address for this new interface. 2080 */ 2081 static struct wireless_dev *brcmf_p2p_create_p2pdev(struct brcmf_p2p_info *p2p, 2082 struct wiphy *wiphy, 2083 u8 *addr) 2084 { 2085 struct brcmf_pub *drvr = p2p->cfg->pub; 2086 struct brcmf_cfg80211_vif *p2p_vif; 2087 struct brcmf_if *p2p_ifp; 2088 struct brcmf_if *pri_ifp; 2089 int err; 2090 u32 bsscfgidx; 2091 2092 if (p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif) 2093 return ERR_PTR(-ENOSPC); 2094 2095 p2p_vif = brcmf_alloc_vif(p2p->cfg, NL80211_IFTYPE_P2P_DEVICE); 2096 if (IS_ERR(p2p_vif)) { 2097 bphy_err(drvr, "could not create discovery vif\n"); 2098 return (struct wireless_dev *)p2p_vif; 2099 } 2100 2101 pri_ifp = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->ifp; 2102 2103 /* firmware requires unique mac address for p2pdev interface */ 2104 if (addr && ether_addr_equal(addr, pri_ifp->mac_addr)) { 2105 bphy_err(drvr, "discovery vif must be different from primary interface\n"); 2106 return ERR_PTR(-EINVAL); 2107 } 2108 2109 brcmf_p2p_generate_bss_mac(p2p, addr); 2110 brcmf_p2p_set_firmware(pri_ifp, p2p->dev_addr); 2111 2112 brcmf_cfg80211_arm_vif_event(p2p->cfg, p2p_vif); 2113 brcmf_fweh_p2pdev_setup(pri_ifp, true); 2114 2115 /* Initialize P2P Discovery in the firmware */ 2116 err = brcmf_fil_iovar_int_set(pri_ifp, "p2p_disc", 1); 2117 if (err < 0) { 2118 bphy_err(drvr, "set p2p_disc error\n"); 2119 brcmf_fweh_p2pdev_setup(pri_ifp, false); 2120 brcmf_cfg80211_arm_vif_event(p2p->cfg, NULL); 2121 goto fail; 2122 } 2123 2124 /* wait for firmware event */ 2125 err = brcmf_cfg80211_wait_vif_event(p2p->cfg, BRCMF_E_IF_ADD, 2126 BRCMF_VIF_EVENT_TIMEOUT); 2127 brcmf_cfg80211_arm_vif_event(p2p->cfg, NULL); 2128 brcmf_fweh_p2pdev_setup(pri_ifp, false); 2129 if (!err) { 2130 bphy_err(drvr, "timeout occurred\n"); 2131 err = -EIO; 2132 goto fail; 2133 } 2134 2135 /* discovery interface created */ 2136 p2p_ifp = p2p_vif->ifp; 2137 p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif = p2p_vif; 2138 memcpy(p2p_ifp->mac_addr, p2p->dev_addr, ETH_ALEN); 2139 memcpy(&p2p_vif->wdev.address, p2p->dev_addr, sizeof(p2p->dev_addr)); 2140 2141 /* verify bsscfg index for P2P discovery */ 2142 err = brcmf_fil_iovar_int_get(pri_ifp, "p2p_dev", &bsscfgidx); 2143 if (err < 0) { 2144 bphy_err(drvr, "retrieving discover bsscfg index failed\n"); 2145 goto fail; 2146 } 2147 2148 WARN_ON(p2p_ifp->bsscfgidx != bsscfgidx); 2149 2150 init_completion(&p2p->send_af_done); 2151 INIT_WORK(&p2p->afx_hdl.afx_work, brcmf_p2p_afx_handler); 2152 init_completion(&p2p->afx_hdl.act_frm_scan); 2153 init_completion(&p2p->wait_next_af); 2154 2155 return &p2p_vif->wdev; 2156 2157 fail: 2158 brcmf_free_vif(p2p_vif); 2159 return ERR_PTR(err); 2160 } 2161 2162 /** 2163 * brcmf_p2p_add_vif() - create a new P2P virtual interface. 2164 * 2165 * @wiphy: wiphy device of new interface. 2166 * @name: name of the new interface. 2167 * @name_assign_type: origin of the interface name 2168 * @type: nl80211 interface type. 2169 * @params: contains mac address for P2P device. 2170 */ 2171 struct wireless_dev *brcmf_p2p_add_vif(struct wiphy *wiphy, const char *name, 2172 unsigned char name_assign_type, 2173 enum nl80211_iftype type, 2174 struct vif_params *params) 2175 { 2176 struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy); 2177 struct brcmf_if *ifp = netdev_priv(cfg_to_ndev(cfg)); 2178 struct brcmf_pub *drvr = cfg->pub; 2179 struct brcmf_cfg80211_vif *vif; 2180 enum brcmf_fil_p2p_if_types iftype; 2181 int err; 2182 2183 if (brcmf_cfg80211_vif_event_armed(cfg)) 2184 return ERR_PTR(-EBUSY); 2185 2186 brcmf_dbg(INFO, "adding vif \"%s\" (type=%d)\n", name, type); 2187 2188 switch (type) { 2189 case NL80211_IFTYPE_P2P_CLIENT: 2190 iftype = BRCMF_FIL_P2P_IF_CLIENT; 2191 break; 2192 case NL80211_IFTYPE_P2P_GO: 2193 iftype = BRCMF_FIL_P2P_IF_GO; 2194 break; 2195 case NL80211_IFTYPE_P2P_DEVICE: 2196 return brcmf_p2p_create_p2pdev(&cfg->p2p, wiphy, 2197 params->macaddr); 2198 default: 2199 return ERR_PTR(-EOPNOTSUPP); 2200 } 2201 2202 vif = brcmf_alloc_vif(cfg, type); 2203 if (IS_ERR(vif)) 2204 return (struct wireless_dev *)vif; 2205 brcmf_cfg80211_arm_vif_event(cfg, vif); 2206 2207 err = brcmf_p2p_request_p2p_if(&cfg->p2p, ifp, cfg->p2p.int_addr, 2208 iftype); 2209 if (err) { 2210 brcmf_cfg80211_arm_vif_event(cfg, NULL); 2211 goto fail; 2212 } 2213 2214 /* wait for firmware event */ 2215 err = brcmf_cfg80211_wait_vif_event(cfg, BRCMF_E_IF_ADD, 2216 BRCMF_VIF_EVENT_TIMEOUT); 2217 brcmf_cfg80211_arm_vif_event(cfg, NULL); 2218 if (!err) { 2219 bphy_err(drvr, "timeout occurred\n"); 2220 err = -EIO; 2221 goto fail; 2222 } 2223 2224 /* interface created in firmware */ 2225 ifp = vif->ifp; 2226 if (!ifp) { 2227 bphy_err(drvr, "no if pointer provided\n"); 2228 err = -ENOENT; 2229 goto fail; 2230 } 2231 2232 strncpy(ifp->ndev->name, name, sizeof(ifp->ndev->name) - 1); 2233 ifp->ndev->name_assign_type = name_assign_type; 2234 err = brcmf_net_attach(ifp, true); 2235 if (err) { 2236 bphy_err(drvr, "Registering netdevice failed\n"); 2237 free_netdev(ifp->ndev); 2238 goto fail; 2239 } 2240 2241 cfg->p2p.bss_idx[P2PAPI_BSSCFG_CONNECTION].vif = vif; 2242 /* Disable firmware roaming for P2P interface */ 2243 brcmf_fil_iovar_int_set(ifp, "roam_off", 1); 2244 if (iftype == BRCMF_FIL_P2P_IF_GO) { 2245 /* set station timeout for p2p */ 2246 brcmf_fil_cmd_int_set(ifp, BRCMF_C_SET_SCB_TIMEOUT, 2247 BRCMF_SCB_TIMEOUT_VALUE); 2248 } 2249 return &ifp->vif->wdev; 2250 2251 fail: 2252 brcmf_free_vif(vif); 2253 return ERR_PTR(err); 2254 } 2255 2256 /** 2257 * brcmf_p2p_del_vif() - delete a P2P virtual interface. 2258 * 2259 * @wiphy: wiphy device of interface. 2260 * @wdev: wireless device of interface. 2261 */ 2262 int brcmf_p2p_del_vif(struct wiphy *wiphy, struct wireless_dev *wdev) 2263 { 2264 struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy); 2265 struct brcmf_p2p_info *p2p = &cfg->p2p; 2266 struct brcmf_cfg80211_vif *vif; 2267 enum nl80211_iftype iftype; 2268 bool wait_for_disable = false; 2269 int err; 2270 2271 brcmf_dbg(TRACE, "delete P2P vif\n"); 2272 vif = container_of(wdev, struct brcmf_cfg80211_vif, wdev); 2273 2274 iftype = vif->wdev.iftype; 2275 brcmf_cfg80211_arm_vif_event(cfg, vif); 2276 switch (iftype) { 2277 case NL80211_IFTYPE_P2P_CLIENT: 2278 if (test_bit(BRCMF_VIF_STATUS_DISCONNECTING, &vif->sme_state)) 2279 wait_for_disable = true; 2280 break; 2281 2282 case NL80211_IFTYPE_P2P_GO: 2283 if (!brcmf_p2p_disable_p2p_if(vif)) 2284 wait_for_disable = true; 2285 break; 2286 2287 case NL80211_IFTYPE_P2P_DEVICE: 2288 if (!p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif) 2289 return 0; 2290 brcmf_p2p_cancel_remain_on_channel(vif->ifp); 2291 brcmf_p2p_deinit_discovery(p2p); 2292 break; 2293 2294 default: 2295 return -ENOTSUPP; 2296 } 2297 2298 clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status); 2299 brcmf_dbg(INFO, "P2P: GO_NEG_PHASE status cleared\n"); 2300 2301 if (wait_for_disable) 2302 wait_for_completion_timeout(&cfg->vif_disabled, 2303 BRCMF_P2P_DISABLE_TIMEOUT); 2304 2305 err = 0; 2306 if (iftype != NL80211_IFTYPE_P2P_DEVICE) { 2307 brcmf_vif_clear_mgmt_ies(vif); 2308 err = brcmf_p2p_release_p2p_if(vif); 2309 } 2310 if (!err) { 2311 /* wait for firmware event */ 2312 err = brcmf_cfg80211_wait_vif_event(cfg, BRCMF_E_IF_DEL, 2313 BRCMF_VIF_EVENT_TIMEOUT); 2314 if (!err) 2315 err = -EIO; 2316 else 2317 err = 0; 2318 } 2319 brcmf_remove_interface(vif->ifp, true); 2320 2321 brcmf_cfg80211_arm_vif_event(cfg, NULL); 2322 if (iftype != NL80211_IFTYPE_P2P_DEVICE) 2323 p2p->bss_idx[P2PAPI_BSSCFG_CONNECTION].vif = NULL; 2324 2325 return err; 2326 } 2327 2328 void brcmf_p2p_ifp_removed(struct brcmf_if *ifp, bool rtnl_locked) 2329 { 2330 struct brcmf_cfg80211_info *cfg; 2331 struct brcmf_cfg80211_vif *vif; 2332 2333 brcmf_dbg(INFO, "P2P: device interface removed\n"); 2334 vif = ifp->vif; 2335 cfg = wdev_to_cfg(&vif->wdev); 2336 cfg->p2p.bss_idx[P2PAPI_BSSCFG_DEVICE].vif = NULL; 2337 if (!rtnl_locked) 2338 rtnl_lock(); 2339 cfg80211_unregister_wdev(&vif->wdev); 2340 if (!rtnl_locked) 2341 rtnl_unlock(); 2342 brcmf_free_vif(vif); 2343 } 2344 2345 int brcmf_p2p_start_device(struct wiphy *wiphy, struct wireless_dev *wdev) 2346 { 2347 struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy); 2348 struct brcmf_p2p_info *p2p = &cfg->p2p; 2349 struct brcmf_cfg80211_vif *vif; 2350 int err; 2351 2352 vif = container_of(wdev, struct brcmf_cfg80211_vif, wdev); 2353 mutex_lock(&cfg->usr_sync); 2354 err = brcmf_p2p_enable_discovery(p2p); 2355 if (!err) 2356 set_bit(BRCMF_VIF_STATUS_READY, &vif->sme_state); 2357 mutex_unlock(&cfg->usr_sync); 2358 return err; 2359 } 2360 2361 void brcmf_p2p_stop_device(struct wiphy *wiphy, struct wireless_dev *wdev) 2362 { 2363 struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy); 2364 struct brcmf_p2p_info *p2p = &cfg->p2p; 2365 struct brcmf_cfg80211_vif *vif; 2366 2367 vif = container_of(wdev, struct brcmf_cfg80211_vif, wdev); 2368 /* This call can be result of the unregister_wdev call. In that case 2369 * we dont want to do anything anymore. Just return. The config vif 2370 * will have been cleared at this point. 2371 */ 2372 if (p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif == vif) { 2373 mutex_lock(&cfg->usr_sync); 2374 /* Set the discovery state to SCAN */ 2375 (void)brcmf_p2p_set_discover_state(vif->ifp, 2376 WL_P2P_DISC_ST_SCAN, 0, 0); 2377 brcmf_abort_scanning(cfg); 2378 clear_bit(BRCMF_VIF_STATUS_READY, &vif->sme_state); 2379 mutex_unlock(&cfg->usr_sync); 2380 } 2381 } 2382 2383 /** 2384 * brcmf_p2p_attach() - attach for P2P. 2385 * 2386 * @cfg: driver private data for cfg80211 interface. 2387 * @p2pdev_forced: create p2p device interface at attach. 2388 */ 2389 s32 brcmf_p2p_attach(struct brcmf_cfg80211_info *cfg, bool p2pdev_forced) 2390 { 2391 struct brcmf_pub *drvr = cfg->pub; 2392 struct brcmf_p2p_info *p2p; 2393 struct brcmf_if *pri_ifp; 2394 s32 err = 0; 2395 void *err_ptr; 2396 2397 p2p = &cfg->p2p; 2398 p2p->cfg = cfg; 2399 2400 pri_ifp = brcmf_get_ifp(cfg->pub, 0); 2401 p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif = pri_ifp->vif; 2402 2403 if (p2pdev_forced) { 2404 err_ptr = brcmf_p2p_create_p2pdev(p2p, NULL, NULL); 2405 if (IS_ERR(err_ptr)) { 2406 bphy_err(drvr, "P2P device creation failed.\n"); 2407 err = PTR_ERR(err_ptr); 2408 } 2409 } else { 2410 p2p->p2pdev_dynamically = true; 2411 } 2412 return err; 2413 } 2414 2415 /** 2416 * brcmf_p2p_detach() - detach P2P. 2417 * 2418 * @p2p: P2P specific data. 2419 */ 2420 void brcmf_p2p_detach(struct brcmf_p2p_info *p2p) 2421 { 2422 struct brcmf_cfg80211_vif *vif; 2423 2424 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif; 2425 if (vif != NULL) { 2426 brcmf_p2p_cancel_remain_on_channel(vif->ifp); 2427 brcmf_p2p_deinit_discovery(p2p); 2428 brcmf_remove_interface(vif->ifp, false); 2429 } 2430 /* just set it all to zero */ 2431 memset(p2p, 0, sizeof(*p2p)); 2432 } 2433 2434