1 /* 2 * Copyright (c) 2012 Broadcom Corporation 3 * 4 * Permission to use, copy, modify, and/or distribute this software for any 5 * purpose with or without fee is hereby granted, provided that the above 6 * copyright notice and this permission notice appear in all copies. 7 * 8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY 11 * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION 13 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN 14 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 15 */ 16 #include <linux/slab.h> 17 #include <linux/netdevice.h> 18 #include <linux/etherdevice.h> 19 #include <linux/rtnetlink.h> 20 #include <net/cfg80211.h> 21 22 #include <brcmu_wifi.h> 23 #include <brcmu_utils.h> 24 #include <defs.h> 25 #include "core.h" 26 #include "debug.h" 27 #include "fwil.h" 28 #include "fwil_types.h" 29 #include "p2p.h" 30 #include "cfg80211.h" 31 32 /* parameters used for p2p escan */ 33 #define P2PAPI_SCAN_NPROBES 1 34 #define P2PAPI_SCAN_DWELL_TIME_MS 80 35 #define P2PAPI_SCAN_SOCIAL_DWELL_TIME_MS 40 36 #define P2PAPI_SCAN_HOME_TIME_MS 60 37 #define P2PAPI_SCAN_NPROBS_TIME_MS 30 38 #define P2PAPI_SCAN_AF_SEARCH_DWELL_TIME_MS 100 39 #define WL_SCAN_CONNECT_DWELL_TIME_MS 200 40 #define WL_SCAN_JOIN_PROBE_INTERVAL_MS 20 41 42 #define BRCMF_P2P_WILDCARD_SSID "DIRECT-" 43 #define BRCMF_P2P_WILDCARD_SSID_LEN (sizeof(BRCMF_P2P_WILDCARD_SSID) - 1) 44 45 #define SOCIAL_CHAN_1 1 46 #define SOCIAL_CHAN_2 6 47 #define SOCIAL_CHAN_3 11 48 #define IS_P2P_SOCIAL_CHANNEL(channel) ((channel == SOCIAL_CHAN_1) || \ 49 (channel == SOCIAL_CHAN_2) || \ 50 (channel == SOCIAL_CHAN_3)) 51 #define BRCMF_P2P_TEMP_CHAN SOCIAL_CHAN_3 52 #define SOCIAL_CHAN_CNT 3 53 #define AF_PEER_SEARCH_CNT 2 54 55 #define BRCMF_SCB_TIMEOUT_VALUE 20 56 57 #define P2P_VER 9 /* P2P version: 9=WiFi P2P v1.0 */ 58 #define P2P_PUB_AF_CATEGORY 0x04 59 #define P2P_PUB_AF_ACTION 0x09 60 #define P2P_AF_CATEGORY 0x7f 61 #define P2P_OUI "\x50\x6F\x9A" /* P2P OUI */ 62 #define P2P_OUI_LEN 3 /* P2P OUI length */ 63 64 /* Action Frame Constants */ 65 #define DOT11_ACTION_HDR_LEN 2 /* action frame category + action */ 66 #define DOT11_ACTION_CAT_OFF 0 /* category offset */ 67 #define DOT11_ACTION_ACT_OFF 1 /* action offset */ 68 69 #define P2P_AF_DWELL_TIME 200 70 #define P2P_AF_MIN_DWELL_TIME 100 71 #define P2P_AF_MED_DWELL_TIME 400 72 #define P2P_AF_LONG_DWELL_TIME 1000 73 #define P2P_AF_TX_MAX_RETRY 1 74 #define P2P_AF_MAX_WAIT_TIME msecs_to_jiffies(2000) 75 #define P2P_INVALID_CHANNEL -1 76 #define P2P_CHANNEL_SYNC_RETRY 5 77 #define P2P_AF_FRM_SCAN_MAX_WAIT msecs_to_jiffies(1500) 78 #define P2P_DEFAULT_SLEEP_TIME_VSDB 200 79 80 /* WiFi P2P Public Action Frame OUI Subtypes */ 81 #define P2P_PAF_GON_REQ 0 /* Group Owner Negotiation Req */ 82 #define P2P_PAF_GON_RSP 1 /* Group Owner Negotiation Rsp */ 83 #define P2P_PAF_GON_CONF 2 /* Group Owner Negotiation Confirm */ 84 #define P2P_PAF_INVITE_REQ 3 /* P2P Invitation Request */ 85 #define P2P_PAF_INVITE_RSP 4 /* P2P Invitation Response */ 86 #define P2P_PAF_DEVDIS_REQ 5 /* Device Discoverability Request */ 87 #define P2P_PAF_DEVDIS_RSP 6 /* Device Discoverability Response */ 88 #define P2P_PAF_PROVDIS_REQ 7 /* Provision Discovery Request */ 89 #define P2P_PAF_PROVDIS_RSP 8 /* Provision Discovery Response */ 90 #define P2P_PAF_SUBTYPE_INVALID 255 /* Invalid Subtype */ 91 92 /* WiFi P2P Action Frame OUI Subtypes */ 93 #define P2P_AF_NOTICE_OF_ABSENCE 0 /* Notice of Absence */ 94 #define P2P_AF_PRESENCE_REQ 1 /* P2P Presence Request */ 95 #define P2P_AF_PRESENCE_RSP 2 /* P2P Presence Response */ 96 #define P2P_AF_GO_DISC_REQ 3 /* GO Discoverability Request */ 97 98 /* P2P Service Discovery related */ 99 #define P2PSD_ACTION_CATEGORY 0x04 /* Public action frame */ 100 #define P2PSD_ACTION_ID_GAS_IREQ 0x0a /* GAS Initial Request AF */ 101 #define P2PSD_ACTION_ID_GAS_IRESP 0x0b /* GAS Initial Response AF */ 102 #define P2PSD_ACTION_ID_GAS_CREQ 0x0c /* GAS Comback Request AF */ 103 #define P2PSD_ACTION_ID_GAS_CRESP 0x0d /* GAS Comback Response AF */ 104 105 #define BRCMF_P2P_DISABLE_TIMEOUT msecs_to_jiffies(500) 106 /** 107 * struct brcmf_p2p_disc_st_le - set discovery state in firmware. 108 * 109 * @state: requested discovery state (see enum brcmf_p2p_disc_state). 110 * @chspec: channel parameter for %WL_P2P_DISC_ST_LISTEN state. 111 * @dwell: dwell time in ms for %WL_P2P_DISC_ST_LISTEN state. 112 */ 113 struct brcmf_p2p_disc_st_le { 114 u8 state; 115 __le16 chspec; 116 __le16 dwell; 117 }; 118 119 /** 120 * enum brcmf_p2p_disc_state - P2P discovery state values 121 * 122 * @WL_P2P_DISC_ST_SCAN: P2P discovery with wildcard SSID and P2P IE. 123 * @WL_P2P_DISC_ST_LISTEN: P2P discovery off-channel for specified time. 124 * @WL_P2P_DISC_ST_SEARCH: P2P discovery with P2P wildcard SSID and P2P IE. 125 */ 126 enum brcmf_p2p_disc_state { 127 WL_P2P_DISC_ST_SCAN, 128 WL_P2P_DISC_ST_LISTEN, 129 WL_P2P_DISC_ST_SEARCH 130 }; 131 132 /** 133 * struct brcmf_p2p_scan_le - P2P specific scan request. 134 * 135 * @type: type of scan method requested (values: 'E' or 'S'). 136 * @reserved: reserved (ignored). 137 * @eparams: parameters used for type 'E'. 138 * @sparams: parameters used for type 'S'. 139 */ 140 struct brcmf_p2p_scan_le { 141 u8 type; 142 u8 reserved[3]; 143 union { 144 struct brcmf_escan_params_le eparams; 145 struct brcmf_scan_params_le sparams; 146 }; 147 }; 148 149 /** 150 * struct brcmf_p2p_pub_act_frame - WiFi P2P Public Action Frame 151 * 152 * @category: P2P_PUB_AF_CATEGORY 153 * @action: P2P_PUB_AF_ACTION 154 * @oui[3]: P2P_OUI 155 * @oui_type: OUI type - P2P_VER 156 * @subtype: OUI subtype - P2P_TYPE_* 157 * @dialog_token: nonzero, identifies req/rsp transaction 158 * @elts[1]: Variable length information elements. 159 */ 160 struct brcmf_p2p_pub_act_frame { 161 u8 category; 162 u8 action; 163 u8 oui[3]; 164 u8 oui_type; 165 u8 subtype; 166 u8 dialog_token; 167 u8 elts[1]; 168 }; 169 170 /** 171 * struct brcmf_p2p_action_frame - WiFi P2P Action Frame 172 * 173 * @category: P2P_AF_CATEGORY 174 * @OUI[3]: OUI - P2P_OUI 175 * @type: OUI Type - P2P_VER 176 * @subtype: OUI Subtype - P2P_AF_* 177 * @dialog_token: nonzero, identifies req/resp tranaction 178 * @elts[1]: Variable length information elements. 179 */ 180 struct brcmf_p2p_action_frame { 181 u8 category; 182 u8 oui[3]; 183 u8 type; 184 u8 subtype; 185 u8 dialog_token; 186 u8 elts[1]; 187 }; 188 189 /** 190 * struct brcmf_p2psd_gas_pub_act_frame - Wi-Fi GAS Public Action Frame 191 * 192 * @category: 0x04 Public Action Frame 193 * @action: 0x6c Advertisement Protocol 194 * @dialog_token: nonzero, identifies req/rsp transaction 195 * @query_data[1]: Query Data. SD gas ireq SD gas iresp 196 */ 197 struct brcmf_p2psd_gas_pub_act_frame { 198 u8 category; 199 u8 action; 200 u8 dialog_token; 201 u8 query_data[1]; 202 }; 203 204 /** 205 * struct brcmf_config_af_params - Action Frame Parameters for tx. 206 * 207 * @mpc_onoff: To make sure to send successfully action frame, we have to 208 * turn off mpc 0: off, 1: on, (-1): do nothing 209 * @search_channel: 1: search peer's channel to send af 210 * extra_listen: keep the dwell time to get af response frame. 211 */ 212 struct brcmf_config_af_params { 213 s32 mpc_onoff; 214 bool search_channel; 215 bool extra_listen; 216 }; 217 218 /** 219 * brcmf_p2p_is_pub_action() - true if p2p public type frame. 220 * 221 * @frame: action frame data. 222 * @frame_len: length of action frame data. 223 * 224 * Determine if action frame is p2p public action type 225 */ 226 static bool brcmf_p2p_is_pub_action(void *frame, u32 frame_len) 227 { 228 struct brcmf_p2p_pub_act_frame *pact_frm; 229 230 if (frame == NULL) 231 return false; 232 233 pact_frm = (struct brcmf_p2p_pub_act_frame *)frame; 234 if (frame_len < sizeof(struct brcmf_p2p_pub_act_frame) - 1) 235 return false; 236 237 if (pact_frm->category == P2P_PUB_AF_CATEGORY && 238 pact_frm->action == P2P_PUB_AF_ACTION && 239 pact_frm->oui_type == P2P_VER && 240 memcmp(pact_frm->oui, P2P_OUI, P2P_OUI_LEN) == 0) 241 return true; 242 243 return false; 244 } 245 246 /** 247 * brcmf_p2p_is_p2p_action() - true if p2p action type frame. 248 * 249 * @frame: action frame data. 250 * @frame_len: length of action frame data. 251 * 252 * Determine if action frame is p2p action type 253 */ 254 static bool brcmf_p2p_is_p2p_action(void *frame, u32 frame_len) 255 { 256 struct brcmf_p2p_action_frame *act_frm; 257 258 if (frame == NULL) 259 return false; 260 261 act_frm = (struct brcmf_p2p_action_frame *)frame; 262 if (frame_len < sizeof(struct brcmf_p2p_action_frame) - 1) 263 return false; 264 265 if (act_frm->category == P2P_AF_CATEGORY && 266 act_frm->type == P2P_VER && 267 memcmp(act_frm->oui, P2P_OUI, P2P_OUI_LEN) == 0) 268 return true; 269 270 return false; 271 } 272 273 /** 274 * brcmf_p2p_is_gas_action() - true if p2p gas action type frame. 275 * 276 * @frame: action frame data. 277 * @frame_len: length of action frame data. 278 * 279 * Determine if action frame is p2p gas action type 280 */ 281 static bool brcmf_p2p_is_gas_action(void *frame, u32 frame_len) 282 { 283 struct brcmf_p2psd_gas_pub_act_frame *sd_act_frm; 284 285 if (frame == NULL) 286 return false; 287 288 sd_act_frm = (struct brcmf_p2psd_gas_pub_act_frame *)frame; 289 if (frame_len < sizeof(struct brcmf_p2psd_gas_pub_act_frame) - 1) 290 return false; 291 292 if (sd_act_frm->category != P2PSD_ACTION_CATEGORY) 293 return false; 294 295 if (sd_act_frm->action == P2PSD_ACTION_ID_GAS_IREQ || 296 sd_act_frm->action == P2PSD_ACTION_ID_GAS_IRESP || 297 sd_act_frm->action == P2PSD_ACTION_ID_GAS_CREQ || 298 sd_act_frm->action == P2PSD_ACTION_ID_GAS_CRESP) 299 return true; 300 301 return false; 302 } 303 304 /** 305 * brcmf_p2p_print_actframe() - debug print routine. 306 * 307 * @tx: Received or to be transmitted 308 * @frame: action frame data. 309 * @frame_len: length of action frame data. 310 * 311 * Print information about the p2p action frame 312 */ 313 314 #ifdef DEBUG 315 316 static void brcmf_p2p_print_actframe(bool tx, void *frame, u32 frame_len) 317 { 318 struct brcmf_p2p_pub_act_frame *pact_frm; 319 struct brcmf_p2p_action_frame *act_frm; 320 struct brcmf_p2psd_gas_pub_act_frame *sd_act_frm; 321 322 if (!frame || frame_len <= 2) 323 return; 324 325 if (brcmf_p2p_is_pub_action(frame, frame_len)) { 326 pact_frm = (struct brcmf_p2p_pub_act_frame *)frame; 327 switch (pact_frm->subtype) { 328 case P2P_PAF_GON_REQ: 329 brcmf_dbg(TRACE, "%s P2P Group Owner Negotiation Req Frame\n", 330 (tx) ? "TX" : "RX"); 331 break; 332 case P2P_PAF_GON_RSP: 333 brcmf_dbg(TRACE, "%s P2P Group Owner Negotiation Rsp Frame\n", 334 (tx) ? "TX" : "RX"); 335 break; 336 case P2P_PAF_GON_CONF: 337 brcmf_dbg(TRACE, "%s P2P Group Owner Negotiation Confirm Frame\n", 338 (tx) ? "TX" : "RX"); 339 break; 340 case P2P_PAF_INVITE_REQ: 341 brcmf_dbg(TRACE, "%s P2P Invitation Request Frame\n", 342 (tx) ? "TX" : "RX"); 343 break; 344 case P2P_PAF_INVITE_RSP: 345 brcmf_dbg(TRACE, "%s P2P Invitation Response Frame\n", 346 (tx) ? "TX" : "RX"); 347 break; 348 case P2P_PAF_DEVDIS_REQ: 349 brcmf_dbg(TRACE, "%s P2P Device Discoverability Request Frame\n", 350 (tx) ? "TX" : "RX"); 351 break; 352 case P2P_PAF_DEVDIS_RSP: 353 brcmf_dbg(TRACE, "%s P2P Device Discoverability Response Frame\n", 354 (tx) ? "TX" : "RX"); 355 break; 356 case P2P_PAF_PROVDIS_REQ: 357 brcmf_dbg(TRACE, "%s P2P Provision Discovery Request Frame\n", 358 (tx) ? "TX" : "RX"); 359 break; 360 case P2P_PAF_PROVDIS_RSP: 361 brcmf_dbg(TRACE, "%s P2P Provision Discovery Response Frame\n", 362 (tx) ? "TX" : "RX"); 363 break; 364 default: 365 brcmf_dbg(TRACE, "%s Unknown P2P Public Action Frame\n", 366 (tx) ? "TX" : "RX"); 367 break; 368 } 369 } else if (brcmf_p2p_is_p2p_action(frame, frame_len)) { 370 act_frm = (struct brcmf_p2p_action_frame *)frame; 371 switch (act_frm->subtype) { 372 case P2P_AF_NOTICE_OF_ABSENCE: 373 brcmf_dbg(TRACE, "%s P2P Notice of Absence Frame\n", 374 (tx) ? "TX" : "RX"); 375 break; 376 case P2P_AF_PRESENCE_REQ: 377 brcmf_dbg(TRACE, "%s P2P Presence Request Frame\n", 378 (tx) ? "TX" : "RX"); 379 break; 380 case P2P_AF_PRESENCE_RSP: 381 brcmf_dbg(TRACE, "%s P2P Presence Response Frame\n", 382 (tx) ? "TX" : "RX"); 383 break; 384 case P2P_AF_GO_DISC_REQ: 385 brcmf_dbg(TRACE, "%s P2P Discoverability Request Frame\n", 386 (tx) ? "TX" : "RX"); 387 break; 388 default: 389 brcmf_dbg(TRACE, "%s Unknown P2P Action Frame\n", 390 (tx) ? "TX" : "RX"); 391 } 392 393 } else if (brcmf_p2p_is_gas_action(frame, frame_len)) { 394 sd_act_frm = (struct brcmf_p2psd_gas_pub_act_frame *)frame; 395 switch (sd_act_frm->action) { 396 case P2PSD_ACTION_ID_GAS_IREQ: 397 brcmf_dbg(TRACE, "%s P2P GAS Initial Request\n", 398 (tx) ? "TX" : "RX"); 399 break; 400 case P2PSD_ACTION_ID_GAS_IRESP: 401 brcmf_dbg(TRACE, "%s P2P GAS Initial Response\n", 402 (tx) ? "TX" : "RX"); 403 break; 404 case P2PSD_ACTION_ID_GAS_CREQ: 405 brcmf_dbg(TRACE, "%s P2P GAS Comback Request\n", 406 (tx) ? "TX" : "RX"); 407 break; 408 case P2PSD_ACTION_ID_GAS_CRESP: 409 brcmf_dbg(TRACE, "%s P2P GAS Comback Response\n", 410 (tx) ? "TX" : "RX"); 411 break; 412 default: 413 brcmf_dbg(TRACE, "%s Unknown P2P GAS Frame\n", 414 (tx) ? "TX" : "RX"); 415 break; 416 } 417 } 418 } 419 420 #else 421 422 static void brcmf_p2p_print_actframe(bool tx, void *frame, u32 frame_len) 423 { 424 } 425 426 #endif 427 428 429 /** 430 * brcmf_p2p_set_firmware() - prepare firmware for peer-to-peer operation. 431 * 432 * @ifp: ifp to use for iovars (primary). 433 * @p2p_mac: mac address to configure for p2p_da_override 434 */ 435 static int brcmf_p2p_set_firmware(struct brcmf_if *ifp, u8 *p2p_mac) 436 { 437 s32 ret = 0; 438 439 brcmf_fil_cmd_int_set(ifp, BRCMF_C_DOWN, 1); 440 brcmf_fil_iovar_int_set(ifp, "apsta", 1); 441 brcmf_fil_cmd_int_set(ifp, BRCMF_C_UP, 1); 442 443 /* In case of COB type, firmware has default mac address 444 * After Initializing firmware, we have to set current mac address to 445 * firmware for P2P device address. This must be done with discovery 446 * disabled. 447 */ 448 brcmf_fil_iovar_int_set(ifp, "p2p_disc", 0); 449 450 ret = brcmf_fil_iovar_data_set(ifp, "p2p_da_override", p2p_mac, 451 ETH_ALEN); 452 if (ret) 453 brcmf_err("failed to update device address ret %d\n", ret); 454 455 return ret; 456 } 457 458 /** 459 * brcmf_p2p_generate_bss_mac() - derive mac addresses for P2P. 460 * 461 * @p2p: P2P specific data. 462 * @dev_addr: optional device address. 463 * 464 * P2P needs mac addresses for P2P device and interface. If no device 465 * address it specified, these are derived from the primary net device, ie. 466 * the permanent ethernet address of the device. 467 */ 468 static void brcmf_p2p_generate_bss_mac(struct brcmf_p2p_info *p2p, u8 *dev_addr) 469 { 470 struct brcmf_if *pri_ifp = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->ifp; 471 bool local_admin = false; 472 473 if (!dev_addr || is_zero_ether_addr(dev_addr)) { 474 dev_addr = pri_ifp->mac_addr; 475 local_admin = true; 476 } 477 478 /* Generate the P2P Device Address. This consists of the device's 479 * primary MAC address with the locally administered bit set. 480 */ 481 memcpy(p2p->dev_addr, dev_addr, ETH_ALEN); 482 if (local_admin) 483 p2p->dev_addr[0] |= 0x02; 484 485 /* Generate the P2P Interface Address. If the discovery and connection 486 * BSSCFGs need to simultaneously co-exist, then this address must be 487 * different from the P2P Device Address, but also locally administered. 488 */ 489 memcpy(p2p->int_addr, p2p->dev_addr, ETH_ALEN); 490 p2p->int_addr[0] |= 0x02; 491 p2p->int_addr[4] ^= 0x80; 492 } 493 494 /** 495 * brcmf_p2p_scan_is_p2p_request() - is cfg80211 scan request a P2P scan. 496 * 497 * @request: the scan request as received from cfg80211. 498 * 499 * returns true if one of the ssids in the request matches the 500 * P2P wildcard ssid; otherwise returns false. 501 */ 502 static bool brcmf_p2p_scan_is_p2p_request(struct cfg80211_scan_request *request) 503 { 504 struct cfg80211_ssid *ssids = request->ssids; 505 int i; 506 507 for (i = 0; i < request->n_ssids; i++) { 508 if (ssids[i].ssid_len != BRCMF_P2P_WILDCARD_SSID_LEN) 509 continue; 510 511 brcmf_dbg(INFO, "comparing ssid \"%s\"", ssids[i].ssid); 512 if (!memcmp(BRCMF_P2P_WILDCARD_SSID, ssids[i].ssid, 513 BRCMF_P2P_WILDCARD_SSID_LEN)) 514 return true; 515 } 516 return false; 517 } 518 519 /** 520 * brcmf_p2p_set_discover_state - set discover state in firmware. 521 * 522 * @ifp: low-level interface object. 523 * @state: discover state to set. 524 * @chanspec: channel parameters (for state @WL_P2P_DISC_ST_LISTEN only). 525 * @listen_ms: duration to listen (for state @WL_P2P_DISC_ST_LISTEN only). 526 */ 527 static s32 brcmf_p2p_set_discover_state(struct brcmf_if *ifp, u8 state, 528 u16 chanspec, u16 listen_ms) 529 { 530 struct brcmf_p2p_disc_st_le discover_state; 531 s32 ret = 0; 532 brcmf_dbg(TRACE, "enter\n"); 533 534 discover_state.state = state; 535 discover_state.chspec = cpu_to_le16(chanspec); 536 discover_state.dwell = cpu_to_le16(listen_ms); 537 ret = brcmf_fil_bsscfg_data_set(ifp, "p2p_state", &discover_state, 538 sizeof(discover_state)); 539 return ret; 540 } 541 542 /** 543 * brcmf_p2p_deinit_discovery() - disable P2P device discovery. 544 * 545 * @p2p: P2P specific data. 546 * 547 * Resets the discovery state and disables it in firmware. 548 */ 549 static s32 brcmf_p2p_deinit_discovery(struct brcmf_p2p_info *p2p) 550 { 551 struct brcmf_cfg80211_vif *vif; 552 553 brcmf_dbg(TRACE, "enter\n"); 554 555 /* Set the discovery state to SCAN */ 556 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif; 557 (void)brcmf_p2p_set_discover_state(vif->ifp, WL_P2P_DISC_ST_SCAN, 0, 0); 558 559 /* Disable P2P discovery in the firmware */ 560 vif = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif; 561 (void)brcmf_fil_iovar_int_set(vif->ifp, "p2p_disc", 0); 562 563 return 0; 564 } 565 566 /** 567 * brcmf_p2p_enable_discovery() - initialize and configure discovery. 568 * 569 * @p2p: P2P specific data. 570 * 571 * Initializes the discovery device and configure the virtual interface. 572 */ 573 static int brcmf_p2p_enable_discovery(struct brcmf_p2p_info *p2p) 574 { 575 struct brcmf_cfg80211_vif *vif; 576 s32 ret = 0; 577 578 brcmf_dbg(TRACE, "enter\n"); 579 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif; 580 if (!vif) { 581 brcmf_err("P2P config device not available\n"); 582 ret = -EPERM; 583 goto exit; 584 } 585 586 if (test_bit(BRCMF_P2P_STATUS_ENABLED, &p2p->status)) { 587 brcmf_dbg(INFO, "P2P config device already configured\n"); 588 goto exit; 589 } 590 591 /* Re-initialize P2P Discovery in the firmware */ 592 vif = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif; 593 ret = brcmf_fil_iovar_int_set(vif->ifp, "p2p_disc", 1); 594 if (ret < 0) { 595 brcmf_err("set p2p_disc error\n"); 596 goto exit; 597 } 598 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif; 599 ret = brcmf_p2p_set_discover_state(vif->ifp, WL_P2P_DISC_ST_SCAN, 0, 0); 600 if (ret < 0) { 601 brcmf_err("unable to set WL_P2P_DISC_ST_SCAN\n"); 602 goto exit; 603 } 604 605 /* 606 * Set wsec to any non-zero value in the discovery bsscfg 607 * to ensure our P2P probe responses have the privacy bit 608 * set in the 802.11 WPA IE. Some peer devices may not 609 * initiate WPS with us if this bit is not set. 610 */ 611 ret = brcmf_fil_bsscfg_int_set(vif->ifp, "wsec", AES_ENABLED); 612 if (ret < 0) { 613 brcmf_err("wsec error %d\n", ret); 614 goto exit; 615 } 616 617 set_bit(BRCMF_P2P_STATUS_ENABLED, &p2p->status); 618 exit: 619 return ret; 620 } 621 622 /** 623 * brcmf_p2p_escan() - initiate a P2P scan. 624 * 625 * @p2p: P2P specific data. 626 * @num_chans: number of channels to scan. 627 * @chanspecs: channel parameters for @num_chans channels. 628 * @search_state: P2P discover state to use. 629 * @bss_type: type of P2P bss. 630 */ 631 static s32 brcmf_p2p_escan(struct brcmf_p2p_info *p2p, u32 num_chans, 632 u16 chanspecs[], s32 search_state, 633 enum p2p_bss_type bss_type) 634 { 635 s32 ret = 0; 636 s32 memsize = offsetof(struct brcmf_p2p_scan_le, 637 eparams.params_le.channel_list); 638 s32 nprobes; 639 s32 active; 640 u32 i; 641 u8 *memblk; 642 struct brcmf_cfg80211_vif *vif; 643 struct brcmf_p2p_scan_le *p2p_params; 644 struct brcmf_scan_params_le *sparams; 645 646 memsize += num_chans * sizeof(__le16); 647 memblk = kzalloc(memsize, GFP_KERNEL); 648 if (!memblk) 649 return -ENOMEM; 650 651 vif = p2p->bss_idx[bss_type].vif; 652 if (vif == NULL) { 653 brcmf_err("no vif for bss type %d\n", bss_type); 654 ret = -EINVAL; 655 goto exit; 656 } 657 p2p_params = (struct brcmf_p2p_scan_le *)memblk; 658 sparams = &p2p_params->eparams.params_le; 659 660 switch (search_state) { 661 case WL_P2P_DISC_ST_SEARCH: 662 /* 663 * If we in SEARCH STATE, we don't need to set SSID explictly 664 * because dongle use P2P WILDCARD internally by default, use 665 * null ssid, which it is already due to kzalloc. 666 */ 667 break; 668 case WL_P2P_DISC_ST_SCAN: 669 /* 670 * wpa_supplicant has p2p_find command with type social or 671 * progressive. For progressive, we need to set the ssid to 672 * P2P WILDCARD because we just do broadcast scan unless 673 * setting SSID. 674 */ 675 sparams->ssid_le.SSID_len = 676 cpu_to_le32(BRCMF_P2P_WILDCARD_SSID_LEN); 677 memcpy(sparams->ssid_le.SSID, BRCMF_P2P_WILDCARD_SSID, 678 BRCMF_P2P_WILDCARD_SSID_LEN); 679 break; 680 default: 681 brcmf_err(" invalid search state %d\n", search_state); 682 ret = -EINVAL; 683 goto exit; 684 } 685 686 brcmf_p2p_set_discover_state(vif->ifp, search_state, 0, 0); 687 688 /* 689 * set p2p scan parameters. 690 */ 691 p2p_params->type = 'E'; 692 693 /* determine the scan engine parameters */ 694 sparams->bss_type = DOT11_BSSTYPE_ANY; 695 if (p2p->cfg->active_scan) 696 sparams->scan_type = 0; 697 else 698 sparams->scan_type = 1; 699 700 eth_broadcast_addr(sparams->bssid); 701 sparams->home_time = cpu_to_le32(P2PAPI_SCAN_HOME_TIME_MS); 702 703 /* 704 * SOCIAL_CHAN_CNT + 1 takes care of the Progressive scan 705 * supported by the supplicant. 706 */ 707 if (num_chans == SOCIAL_CHAN_CNT || num_chans == (SOCIAL_CHAN_CNT + 1)) 708 active = P2PAPI_SCAN_SOCIAL_DWELL_TIME_MS; 709 else if (num_chans == AF_PEER_SEARCH_CNT) 710 active = P2PAPI_SCAN_AF_SEARCH_DWELL_TIME_MS; 711 else if (brcmf_get_vif_state_any(p2p->cfg, BRCMF_VIF_STATUS_CONNECTED)) 712 active = -1; 713 else 714 active = P2PAPI_SCAN_DWELL_TIME_MS; 715 716 /* Override scan params to find a peer for a connection */ 717 if (num_chans == 1) { 718 active = WL_SCAN_CONNECT_DWELL_TIME_MS; 719 /* WAR to sync with presence period of VSDB GO. 720 * send probe request more frequently 721 */ 722 nprobes = active / WL_SCAN_JOIN_PROBE_INTERVAL_MS; 723 } else { 724 nprobes = active / P2PAPI_SCAN_NPROBS_TIME_MS; 725 } 726 727 if (nprobes <= 0) 728 nprobes = 1; 729 730 brcmf_dbg(INFO, "nprobes # %d, active_time %d\n", nprobes, active); 731 sparams->active_time = cpu_to_le32(active); 732 sparams->nprobes = cpu_to_le32(nprobes); 733 sparams->passive_time = cpu_to_le32(-1); 734 sparams->channel_num = cpu_to_le32(num_chans & 735 BRCMF_SCAN_PARAMS_COUNT_MASK); 736 for (i = 0; i < num_chans; i++) 737 sparams->channel_list[i] = cpu_to_le16(chanspecs[i]); 738 739 /* set the escan specific parameters */ 740 p2p_params->eparams.version = cpu_to_le32(BRCMF_ESCAN_REQ_VERSION); 741 p2p_params->eparams.action = cpu_to_le16(WL_ESCAN_ACTION_START); 742 p2p_params->eparams.sync_id = cpu_to_le16(0x1234); 743 /* perform p2p scan on primary device */ 744 ret = brcmf_fil_bsscfg_data_set(vif->ifp, "p2p_scan", memblk, memsize); 745 if (!ret) 746 set_bit(BRCMF_SCAN_STATUS_BUSY, &p2p->cfg->scan_status); 747 exit: 748 kfree(memblk); 749 return ret; 750 } 751 752 /** 753 * brcmf_p2p_run_escan() - escan callback for peer-to-peer. 754 * 755 * @cfg: driver private data for cfg80211 interface. 756 * @ndev: net device for which scan is requested. 757 * @request: scan request from cfg80211. 758 * @action: scan action. 759 * 760 * Determines the P2P discovery state based to scan request parameters and 761 * validates the channels in the request. 762 */ 763 static s32 brcmf_p2p_run_escan(struct brcmf_cfg80211_info *cfg, 764 struct brcmf_if *ifp, 765 struct cfg80211_scan_request *request) 766 { 767 struct brcmf_p2p_info *p2p = &cfg->p2p; 768 s32 err = 0; 769 s32 search_state = WL_P2P_DISC_ST_SCAN; 770 struct brcmf_cfg80211_vif *vif; 771 struct net_device *dev = NULL; 772 int i, num_nodfs = 0; 773 u16 *chanspecs; 774 775 brcmf_dbg(TRACE, "enter\n"); 776 777 if (!request) { 778 err = -EINVAL; 779 goto exit; 780 } 781 782 if (request->n_channels) { 783 chanspecs = kcalloc(request->n_channels, sizeof(*chanspecs), 784 GFP_KERNEL); 785 if (!chanspecs) { 786 err = -ENOMEM; 787 goto exit; 788 } 789 vif = p2p->bss_idx[P2PAPI_BSSCFG_CONNECTION].vif; 790 if (vif) 791 dev = vif->wdev.netdev; 792 if (request->n_channels == 3 && 793 request->channels[0]->hw_value == SOCIAL_CHAN_1 && 794 request->channels[1]->hw_value == SOCIAL_CHAN_2 && 795 request->channels[2]->hw_value == SOCIAL_CHAN_3) { 796 /* SOCIAL CHANNELS 1, 6, 11 */ 797 search_state = WL_P2P_DISC_ST_SEARCH; 798 brcmf_dbg(INFO, "P2P SEARCH PHASE START\n"); 799 } else if (dev != NULL && 800 vif->wdev.iftype == NL80211_IFTYPE_P2P_GO) { 801 /* If you are already a GO, then do SEARCH only */ 802 brcmf_dbg(INFO, "Already a GO. Do SEARCH Only\n"); 803 search_state = WL_P2P_DISC_ST_SEARCH; 804 } else { 805 brcmf_dbg(INFO, "P2P SCAN STATE START\n"); 806 } 807 808 /* 809 * no P2P scanning on passive or DFS channels. 810 */ 811 for (i = 0; i < request->n_channels; i++) { 812 struct ieee80211_channel *chan = request->channels[i]; 813 814 if (chan->flags & (IEEE80211_CHAN_RADAR | 815 IEEE80211_CHAN_NO_IR)) 816 continue; 817 818 chanspecs[i] = channel_to_chanspec(&p2p->cfg->d11inf, 819 chan); 820 brcmf_dbg(INFO, "%d: chan=%d, channel spec=%x\n", 821 num_nodfs, chan->hw_value, chanspecs[i]); 822 num_nodfs++; 823 } 824 err = brcmf_p2p_escan(p2p, num_nodfs, chanspecs, search_state, 825 P2PAPI_BSSCFG_DEVICE); 826 kfree(chanspecs); 827 } 828 exit: 829 if (err) 830 brcmf_err("error (%d)\n", err); 831 return err; 832 } 833 834 835 /** 836 * brcmf_p2p_find_listen_channel() - find listen channel in ie string. 837 * 838 * @ie: string of information elements. 839 * @ie_len: length of string. 840 * 841 * Scan ie for p2p ie and look for attribute 6 channel. If available determine 842 * channel and return it. 843 */ 844 static s32 brcmf_p2p_find_listen_channel(const u8 *ie, u32 ie_len) 845 { 846 u8 channel_ie[5]; 847 s32 listen_channel; 848 s32 err; 849 850 err = cfg80211_get_p2p_attr(ie, ie_len, 851 IEEE80211_P2P_ATTR_LISTEN_CHANNEL, 852 channel_ie, sizeof(channel_ie)); 853 if (err < 0) 854 return err; 855 856 /* listen channel subel length format: */ 857 /* 3(country) + 1(op. class) + 1(chan num) */ 858 listen_channel = (s32)channel_ie[3 + 1]; 859 860 if (listen_channel == SOCIAL_CHAN_1 || 861 listen_channel == SOCIAL_CHAN_2 || 862 listen_channel == SOCIAL_CHAN_3) { 863 brcmf_dbg(INFO, "Found my Listen Channel %d\n", listen_channel); 864 return listen_channel; 865 } 866 867 return -EPERM; 868 } 869 870 871 /** 872 * brcmf_p2p_scan_prep() - prepare scan based on request. 873 * 874 * @wiphy: wiphy device. 875 * @request: scan request from cfg80211. 876 * @vif: vif on which scan request is to be executed. 877 * 878 * Prepare the scan appropriately for type of scan requested. Overrides the 879 * escan .run() callback for peer-to-peer scanning. 880 */ 881 int brcmf_p2p_scan_prep(struct wiphy *wiphy, 882 struct cfg80211_scan_request *request, 883 struct brcmf_cfg80211_vif *vif) 884 { 885 struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy); 886 struct brcmf_p2p_info *p2p = &cfg->p2p; 887 int err = 0; 888 889 if (brcmf_p2p_scan_is_p2p_request(request)) { 890 /* find my listen channel */ 891 err = brcmf_p2p_find_listen_channel(request->ie, 892 request->ie_len); 893 if (err < 0) 894 return err; 895 896 p2p->afx_hdl.my_listen_chan = err; 897 898 clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status); 899 brcmf_dbg(INFO, "P2P: GO_NEG_PHASE status cleared\n"); 900 901 err = brcmf_p2p_enable_discovery(p2p); 902 if (err) 903 return err; 904 905 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif; 906 907 /* override .run_escan() callback. */ 908 cfg->escan_info.run = brcmf_p2p_run_escan; 909 } 910 err = brcmf_vif_set_mgmt_ie(vif, BRCMF_VNDR_IE_PRBREQ_FLAG, 911 request->ie, request->ie_len); 912 return err; 913 } 914 915 916 /** 917 * brcmf_p2p_discover_listen() - set firmware to discover listen state. 918 * 919 * @p2p: p2p device. 920 * @channel: channel nr for discover listen. 921 * @duration: time in ms to stay on channel. 922 * 923 */ 924 static s32 925 brcmf_p2p_discover_listen(struct brcmf_p2p_info *p2p, u16 channel, u32 duration) 926 { 927 struct brcmf_cfg80211_vif *vif; 928 struct brcmu_chan ch; 929 s32 err = 0; 930 931 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif; 932 if (!vif) { 933 brcmf_err("Discovery is not set, so we have nothing to do\n"); 934 err = -EPERM; 935 goto exit; 936 } 937 938 if (test_bit(BRCMF_P2P_STATUS_DISCOVER_LISTEN, &p2p->status)) { 939 brcmf_err("Previous LISTEN is not completed yet\n"); 940 /* WAR: prevent cookie mismatch in wpa_supplicant return OK */ 941 goto exit; 942 } 943 944 ch.chnum = channel; 945 ch.bw = BRCMU_CHAN_BW_20; 946 p2p->cfg->d11inf.encchspec(&ch); 947 err = brcmf_p2p_set_discover_state(vif->ifp, WL_P2P_DISC_ST_LISTEN, 948 ch.chspec, (u16)duration); 949 if (!err) { 950 set_bit(BRCMF_P2P_STATUS_DISCOVER_LISTEN, &p2p->status); 951 p2p->remain_on_channel_cookie++; 952 } 953 exit: 954 return err; 955 } 956 957 958 /** 959 * brcmf_p2p_remain_on_channel() - put device on channel and stay there. 960 * 961 * @wiphy: wiphy device. 962 * @channel: channel to stay on. 963 * @duration: time in ms to remain on channel. 964 * 965 */ 966 int brcmf_p2p_remain_on_channel(struct wiphy *wiphy, struct wireless_dev *wdev, 967 struct ieee80211_channel *channel, 968 unsigned int duration, u64 *cookie) 969 { 970 struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy); 971 struct brcmf_p2p_info *p2p = &cfg->p2p; 972 s32 err; 973 u16 channel_nr; 974 975 channel_nr = ieee80211_frequency_to_channel(channel->center_freq); 976 brcmf_dbg(TRACE, "Enter, channel: %d, duration ms (%d)\n", channel_nr, 977 duration); 978 979 err = brcmf_p2p_enable_discovery(p2p); 980 if (err) 981 goto exit; 982 err = brcmf_p2p_discover_listen(p2p, channel_nr, duration); 983 if (err) 984 goto exit; 985 986 memcpy(&p2p->remain_on_channel, channel, sizeof(*channel)); 987 *cookie = p2p->remain_on_channel_cookie; 988 cfg80211_ready_on_channel(wdev, *cookie, channel, duration, GFP_KERNEL); 989 990 exit: 991 return err; 992 } 993 994 995 /** 996 * brcmf_p2p_notify_listen_complete() - p2p listen has completed. 997 * 998 * @ifp: interfac control. 999 * @e: event message. Not used, to make it usable for fweh event dispatcher. 1000 * @data: payload of message. Not used. 1001 * 1002 */ 1003 int brcmf_p2p_notify_listen_complete(struct brcmf_if *ifp, 1004 const struct brcmf_event_msg *e, 1005 void *data) 1006 { 1007 struct brcmf_cfg80211_info *cfg = ifp->drvr->config; 1008 struct brcmf_p2p_info *p2p = &cfg->p2p; 1009 1010 brcmf_dbg(TRACE, "Enter\n"); 1011 if (test_and_clear_bit(BRCMF_P2P_STATUS_DISCOVER_LISTEN, 1012 &p2p->status)) { 1013 if (test_and_clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_AF_LISTEN, 1014 &p2p->status)) { 1015 clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, 1016 &p2p->status); 1017 brcmf_dbg(INFO, "Listen DONE, wake up wait_next_af\n"); 1018 complete(&p2p->wait_next_af); 1019 } 1020 1021 cfg80211_remain_on_channel_expired(&ifp->vif->wdev, 1022 p2p->remain_on_channel_cookie, 1023 &p2p->remain_on_channel, 1024 GFP_KERNEL); 1025 } 1026 return 0; 1027 } 1028 1029 1030 /** 1031 * brcmf_p2p_cancel_remain_on_channel() - cancel p2p listen state. 1032 * 1033 * @ifp: interfac control. 1034 * 1035 */ 1036 void brcmf_p2p_cancel_remain_on_channel(struct brcmf_if *ifp) 1037 { 1038 if (!ifp) 1039 return; 1040 brcmf_p2p_set_discover_state(ifp, WL_P2P_DISC_ST_SCAN, 0, 0); 1041 brcmf_p2p_notify_listen_complete(ifp, NULL, NULL); 1042 } 1043 1044 1045 /** 1046 * brcmf_p2p_act_frm_search() - search function for action frame. 1047 * 1048 * @p2p: p2p device. 1049 * channel: channel on which action frame is to be trasmitted. 1050 * 1051 * search function to reach at common channel to send action frame. When 1052 * channel is 0 then all social channels will be used to send af 1053 */ 1054 static s32 brcmf_p2p_act_frm_search(struct brcmf_p2p_info *p2p, u16 channel) 1055 { 1056 s32 err; 1057 u32 channel_cnt; 1058 u16 *default_chan_list; 1059 u32 i; 1060 struct brcmu_chan ch; 1061 1062 brcmf_dbg(TRACE, "Enter\n"); 1063 1064 if (channel) 1065 channel_cnt = AF_PEER_SEARCH_CNT; 1066 else 1067 channel_cnt = SOCIAL_CHAN_CNT; 1068 default_chan_list = kzalloc(channel_cnt * sizeof(*default_chan_list), 1069 GFP_KERNEL); 1070 if (default_chan_list == NULL) { 1071 brcmf_err("channel list allocation failed\n"); 1072 err = -ENOMEM; 1073 goto exit; 1074 } 1075 ch.bw = BRCMU_CHAN_BW_20; 1076 if (channel) { 1077 ch.chnum = channel; 1078 p2p->cfg->d11inf.encchspec(&ch); 1079 /* insert same channel to the chan_list */ 1080 for (i = 0; i < channel_cnt; i++) 1081 default_chan_list[i] = ch.chspec; 1082 } else { 1083 ch.chnum = SOCIAL_CHAN_1; 1084 p2p->cfg->d11inf.encchspec(&ch); 1085 default_chan_list[0] = ch.chspec; 1086 ch.chnum = SOCIAL_CHAN_2; 1087 p2p->cfg->d11inf.encchspec(&ch); 1088 default_chan_list[1] = ch.chspec; 1089 ch.chnum = SOCIAL_CHAN_3; 1090 p2p->cfg->d11inf.encchspec(&ch); 1091 default_chan_list[2] = ch.chspec; 1092 } 1093 err = brcmf_p2p_escan(p2p, channel_cnt, default_chan_list, 1094 WL_P2P_DISC_ST_SEARCH, P2PAPI_BSSCFG_DEVICE); 1095 kfree(default_chan_list); 1096 exit: 1097 return err; 1098 } 1099 1100 1101 /** 1102 * brcmf_p2p_afx_handler() - afx worker thread. 1103 * 1104 * @work: 1105 * 1106 */ 1107 static void brcmf_p2p_afx_handler(struct work_struct *work) 1108 { 1109 struct afx_hdl *afx_hdl = container_of(work, struct afx_hdl, afx_work); 1110 struct brcmf_p2p_info *p2p = container_of(afx_hdl, 1111 struct brcmf_p2p_info, 1112 afx_hdl); 1113 s32 err; 1114 1115 if (!afx_hdl->is_active) 1116 return; 1117 1118 if (afx_hdl->is_listen && afx_hdl->my_listen_chan) 1119 /* 100ms ~ 300ms */ 1120 err = brcmf_p2p_discover_listen(p2p, afx_hdl->my_listen_chan, 1121 100 * (1 + prandom_u32() % 3)); 1122 else 1123 err = brcmf_p2p_act_frm_search(p2p, afx_hdl->peer_listen_chan); 1124 1125 if (err) { 1126 brcmf_err("ERROR occurred! value is (%d)\n", err); 1127 if (test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, 1128 &p2p->status)) 1129 complete(&afx_hdl->act_frm_scan); 1130 } 1131 } 1132 1133 1134 /** 1135 * brcmf_p2p_af_searching_channel() - search channel. 1136 * 1137 * @p2p: p2p device info struct. 1138 * 1139 */ 1140 static s32 brcmf_p2p_af_searching_channel(struct brcmf_p2p_info *p2p) 1141 { 1142 struct afx_hdl *afx_hdl = &p2p->afx_hdl; 1143 struct brcmf_cfg80211_vif *pri_vif; 1144 unsigned long duration; 1145 s32 retry; 1146 1147 brcmf_dbg(TRACE, "Enter\n"); 1148 1149 pri_vif = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif; 1150 1151 reinit_completion(&afx_hdl->act_frm_scan); 1152 set_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status); 1153 afx_hdl->is_active = true; 1154 afx_hdl->peer_chan = P2P_INVALID_CHANNEL; 1155 1156 /* Loop to wait until we find a peer's channel or the 1157 * pending action frame tx is cancelled. 1158 */ 1159 retry = 0; 1160 duration = msecs_to_jiffies(P2P_AF_FRM_SCAN_MAX_WAIT); 1161 while ((retry < P2P_CHANNEL_SYNC_RETRY) && 1162 (afx_hdl->peer_chan == P2P_INVALID_CHANNEL)) { 1163 afx_hdl->is_listen = false; 1164 brcmf_dbg(TRACE, "Scheduling action frame for sending.. (%d)\n", 1165 retry); 1166 /* search peer on peer's listen channel */ 1167 schedule_work(&afx_hdl->afx_work); 1168 wait_for_completion_timeout(&afx_hdl->act_frm_scan, duration); 1169 if ((afx_hdl->peer_chan != P2P_INVALID_CHANNEL) || 1170 (!test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, 1171 &p2p->status))) 1172 break; 1173 1174 if (afx_hdl->my_listen_chan) { 1175 brcmf_dbg(TRACE, "Scheduling listen peer, channel=%d\n", 1176 afx_hdl->my_listen_chan); 1177 /* listen on my listen channel */ 1178 afx_hdl->is_listen = true; 1179 schedule_work(&afx_hdl->afx_work); 1180 wait_for_completion_timeout(&afx_hdl->act_frm_scan, 1181 duration); 1182 } 1183 if ((afx_hdl->peer_chan != P2P_INVALID_CHANNEL) || 1184 (!test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, 1185 &p2p->status))) 1186 break; 1187 retry++; 1188 1189 /* if sta is connected or connecting, sleep for a while before 1190 * retry af tx or finding a peer 1191 */ 1192 if (test_bit(BRCMF_VIF_STATUS_CONNECTED, &pri_vif->sme_state) || 1193 test_bit(BRCMF_VIF_STATUS_CONNECTING, &pri_vif->sme_state)) 1194 msleep(P2P_DEFAULT_SLEEP_TIME_VSDB); 1195 } 1196 1197 brcmf_dbg(TRACE, "Completed search/listen peer_chan=%d\n", 1198 afx_hdl->peer_chan); 1199 afx_hdl->is_active = false; 1200 1201 clear_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status); 1202 1203 return afx_hdl->peer_chan; 1204 } 1205 1206 1207 /** 1208 * brcmf_p2p_scan_finding_common_channel() - was escan used for finding channel 1209 * 1210 * @cfg: common configuration struct. 1211 * @bi: bss info struct, result from scan. 1212 * 1213 */ 1214 bool brcmf_p2p_scan_finding_common_channel(struct brcmf_cfg80211_info *cfg, 1215 struct brcmf_bss_info_le *bi) 1216 1217 { 1218 struct brcmf_p2p_info *p2p = &cfg->p2p; 1219 struct afx_hdl *afx_hdl = &p2p->afx_hdl; 1220 struct brcmu_chan ch; 1221 u8 *ie; 1222 s32 err; 1223 u8 p2p_dev_addr[ETH_ALEN]; 1224 1225 if (!test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status)) 1226 return false; 1227 1228 if (bi == NULL) { 1229 brcmf_dbg(TRACE, "ACTION FRAME SCAN Done\n"); 1230 if (afx_hdl->peer_chan == P2P_INVALID_CHANNEL) 1231 complete(&afx_hdl->act_frm_scan); 1232 return true; 1233 } 1234 1235 ie = ((u8 *)bi) + le16_to_cpu(bi->ie_offset); 1236 memset(p2p_dev_addr, 0, sizeof(p2p_dev_addr)); 1237 err = cfg80211_get_p2p_attr(ie, le32_to_cpu(bi->ie_length), 1238 IEEE80211_P2P_ATTR_DEVICE_INFO, 1239 p2p_dev_addr, sizeof(p2p_dev_addr)); 1240 if (err < 0) 1241 err = cfg80211_get_p2p_attr(ie, le32_to_cpu(bi->ie_length), 1242 IEEE80211_P2P_ATTR_DEVICE_ID, 1243 p2p_dev_addr, sizeof(p2p_dev_addr)); 1244 if ((err >= 0) && 1245 (ether_addr_equal(p2p_dev_addr, afx_hdl->tx_dst_addr))) { 1246 if (!bi->ctl_ch) { 1247 ch.chspec = le16_to_cpu(bi->chanspec); 1248 cfg->d11inf.decchspec(&ch); 1249 bi->ctl_ch = ch.chnum; 1250 } 1251 afx_hdl->peer_chan = bi->ctl_ch; 1252 brcmf_dbg(TRACE, "ACTION FRAME SCAN : Peer %pM found, channel : %d\n", 1253 afx_hdl->tx_dst_addr, afx_hdl->peer_chan); 1254 complete(&afx_hdl->act_frm_scan); 1255 } 1256 return true; 1257 } 1258 1259 /** 1260 * brcmf_p2p_stop_wait_next_action_frame() - finish scan if af tx complete. 1261 * 1262 * @cfg: common configuration struct. 1263 * 1264 */ 1265 static void 1266 brcmf_p2p_stop_wait_next_action_frame(struct brcmf_cfg80211_info *cfg) 1267 { 1268 struct brcmf_p2p_info *p2p = &cfg->p2p; 1269 struct brcmf_if *ifp = cfg->escan_info.ifp; 1270 1271 if (test_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status) && 1272 (test_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status) || 1273 test_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status))) { 1274 brcmf_dbg(TRACE, "*** Wake UP ** abort actframe iovar\n"); 1275 /* if channel is not zero, "actfame" uses off channel scan. 1276 * So abort scan for off channel completion. 1277 */ 1278 if (p2p->af_sent_channel) 1279 brcmf_notify_escan_complete(cfg, ifp, true, true); 1280 } else if (test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_AF_LISTEN, 1281 &p2p->status)) { 1282 brcmf_dbg(TRACE, "*** Wake UP ** abort listen for next af frame\n"); 1283 /* So abort scan to cancel listen */ 1284 brcmf_notify_escan_complete(cfg, ifp, true, true); 1285 } 1286 } 1287 1288 1289 /** 1290 * brcmf_p2p_gon_req_collision() - Check if go negotiaton collission 1291 * 1292 * @p2p: p2p device info struct. 1293 * 1294 * return true if recevied action frame is to be dropped. 1295 */ 1296 static bool 1297 brcmf_p2p_gon_req_collision(struct brcmf_p2p_info *p2p, u8 *mac) 1298 { 1299 struct brcmf_cfg80211_info *cfg = p2p->cfg; 1300 struct brcmf_if *ifp; 1301 1302 brcmf_dbg(TRACE, "Enter\n"); 1303 1304 if (!test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status) || 1305 !p2p->gon_req_action) 1306 return false; 1307 1308 brcmf_dbg(TRACE, "GO Negotiation Request COLLISION !!!\n"); 1309 /* if sa(peer) addr is less than da(my) addr, then this device 1310 * process peer's gon request and block to send gon req. 1311 * if not (sa addr > da addr), 1312 * this device will process gon request and drop gon req of peer. 1313 */ 1314 ifp = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif->ifp; 1315 if (memcmp(mac, ifp->mac_addr, ETH_ALEN) < 0) { 1316 brcmf_dbg(INFO, "Block transmit gon req !!!\n"); 1317 p2p->block_gon_req_tx = true; 1318 /* if we are finding a common channel for sending af, 1319 * do not scan more to block to send current gon req 1320 */ 1321 if (test_and_clear_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, 1322 &p2p->status)) 1323 complete(&p2p->afx_hdl.act_frm_scan); 1324 if (test_and_clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, 1325 &p2p->status)) 1326 brcmf_p2p_stop_wait_next_action_frame(cfg); 1327 return false; 1328 } 1329 1330 /* drop gon request of peer to process gon request by this device. */ 1331 brcmf_dbg(INFO, "Drop received gon req !!!\n"); 1332 1333 return true; 1334 } 1335 1336 1337 /** 1338 * brcmf_p2p_notify_action_frame_rx() - received action frame. 1339 * 1340 * @ifp: interfac control. 1341 * @e: event message. Not used, to make it usable for fweh event dispatcher. 1342 * @data: payload of message, containing action frame data. 1343 * 1344 */ 1345 int brcmf_p2p_notify_action_frame_rx(struct brcmf_if *ifp, 1346 const struct brcmf_event_msg *e, 1347 void *data) 1348 { 1349 struct brcmf_cfg80211_info *cfg = ifp->drvr->config; 1350 struct brcmf_p2p_info *p2p = &cfg->p2p; 1351 struct afx_hdl *afx_hdl = &p2p->afx_hdl; 1352 struct wireless_dev *wdev; 1353 u32 mgmt_frame_len = e->datalen - sizeof(struct brcmf_rx_mgmt_data); 1354 struct brcmf_rx_mgmt_data *rxframe = (struct brcmf_rx_mgmt_data *)data; 1355 u8 *frame = (u8 *)(rxframe + 1); 1356 struct brcmf_p2p_pub_act_frame *act_frm; 1357 struct brcmf_p2psd_gas_pub_act_frame *sd_act_frm; 1358 struct brcmu_chan ch; 1359 struct ieee80211_mgmt *mgmt_frame; 1360 s32 freq; 1361 u16 mgmt_type; 1362 u8 action; 1363 1364 ch.chspec = be16_to_cpu(rxframe->chanspec); 1365 cfg->d11inf.decchspec(&ch); 1366 /* Check if wpa_supplicant has registered for this frame */ 1367 brcmf_dbg(INFO, "ifp->vif->mgmt_rx_reg %04x\n", ifp->vif->mgmt_rx_reg); 1368 mgmt_type = (IEEE80211_STYPE_ACTION & IEEE80211_FCTL_STYPE) >> 4; 1369 if ((ifp->vif->mgmt_rx_reg & BIT(mgmt_type)) == 0) 1370 return 0; 1371 1372 brcmf_p2p_print_actframe(false, frame, mgmt_frame_len); 1373 1374 action = P2P_PAF_SUBTYPE_INVALID; 1375 if (brcmf_p2p_is_pub_action(frame, mgmt_frame_len)) { 1376 act_frm = (struct brcmf_p2p_pub_act_frame *)frame; 1377 action = act_frm->subtype; 1378 if ((action == P2P_PAF_GON_REQ) && 1379 (brcmf_p2p_gon_req_collision(p2p, (u8 *)e->addr))) { 1380 if (test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, 1381 &p2p->status) && 1382 (ether_addr_equal(afx_hdl->tx_dst_addr, e->addr))) { 1383 afx_hdl->peer_chan = ch.chnum; 1384 brcmf_dbg(INFO, "GON request: Peer found, channel=%d\n", 1385 afx_hdl->peer_chan); 1386 complete(&afx_hdl->act_frm_scan); 1387 } 1388 return 0; 1389 } 1390 /* After complete GO Negotiation, roll back to mpc mode */ 1391 if ((action == P2P_PAF_GON_CONF) || 1392 (action == P2P_PAF_PROVDIS_RSP)) 1393 brcmf_set_mpc(ifp, 1); 1394 if (action == P2P_PAF_GON_CONF) { 1395 brcmf_dbg(TRACE, "P2P: GO_NEG_PHASE status cleared\n"); 1396 clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status); 1397 } 1398 } else if (brcmf_p2p_is_gas_action(frame, mgmt_frame_len)) { 1399 sd_act_frm = (struct brcmf_p2psd_gas_pub_act_frame *)frame; 1400 action = sd_act_frm->action; 1401 } 1402 1403 if (test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status) && 1404 (p2p->next_af_subtype == action)) { 1405 brcmf_dbg(TRACE, "We got a right next frame! (%d)\n", action); 1406 clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, 1407 &p2p->status); 1408 /* Stop waiting for next AF. */ 1409 brcmf_p2p_stop_wait_next_action_frame(cfg); 1410 } 1411 1412 mgmt_frame = kzalloc(offsetof(struct ieee80211_mgmt, u) + 1413 mgmt_frame_len, GFP_KERNEL); 1414 if (!mgmt_frame) { 1415 brcmf_err("No memory available for action frame\n"); 1416 return -ENOMEM; 1417 } 1418 memcpy(mgmt_frame->da, ifp->mac_addr, ETH_ALEN); 1419 brcmf_fil_cmd_data_get(ifp, BRCMF_C_GET_BSSID, mgmt_frame->bssid, 1420 ETH_ALEN); 1421 memcpy(mgmt_frame->sa, e->addr, ETH_ALEN); 1422 mgmt_frame->frame_control = cpu_to_le16(IEEE80211_STYPE_ACTION); 1423 memcpy(&mgmt_frame->u, frame, mgmt_frame_len); 1424 mgmt_frame_len += offsetof(struct ieee80211_mgmt, u); 1425 1426 freq = ieee80211_channel_to_frequency(ch.chnum, 1427 ch.band == BRCMU_CHAN_BAND_2G ? 1428 IEEE80211_BAND_2GHZ : 1429 IEEE80211_BAND_5GHZ); 1430 1431 wdev = &ifp->vif->wdev; 1432 cfg80211_rx_mgmt(wdev, freq, 0, (u8 *)mgmt_frame, mgmt_frame_len, 0); 1433 1434 kfree(mgmt_frame); 1435 return 0; 1436 } 1437 1438 1439 /** 1440 * brcmf_p2p_notify_action_tx_complete() - transmit action frame complete 1441 * 1442 * @ifp: interfac control. 1443 * @e: event message. Not used, to make it usable for fweh event dispatcher. 1444 * @data: not used. 1445 * 1446 */ 1447 int brcmf_p2p_notify_action_tx_complete(struct brcmf_if *ifp, 1448 const struct brcmf_event_msg *e, 1449 void *data) 1450 { 1451 struct brcmf_cfg80211_info *cfg = ifp->drvr->config; 1452 struct brcmf_p2p_info *p2p = &cfg->p2p; 1453 1454 brcmf_dbg(INFO, "Enter: event %s, status=%d\n", 1455 e->event_code == BRCMF_E_ACTION_FRAME_OFF_CHAN_COMPLETE ? 1456 "ACTION_FRAME_OFF_CHAN_COMPLETE" : "ACTION_FRAME_COMPLETE", 1457 e->status); 1458 1459 if (!test_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status)) 1460 return 0; 1461 1462 if (e->event_code == BRCMF_E_ACTION_FRAME_COMPLETE) { 1463 if (e->status == BRCMF_E_STATUS_SUCCESS) 1464 set_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, 1465 &p2p->status); 1466 else { 1467 set_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status); 1468 /* If there is no ack, we don't need to wait for 1469 * WLC_E_ACTION_FRAME_OFFCHAN_COMPLETE event 1470 */ 1471 brcmf_p2p_stop_wait_next_action_frame(cfg); 1472 } 1473 1474 } else { 1475 complete(&p2p->send_af_done); 1476 } 1477 return 0; 1478 } 1479 1480 1481 /** 1482 * brcmf_p2p_tx_action_frame() - send action frame over fil. 1483 * 1484 * @p2p: p2p info struct for vif. 1485 * @af_params: action frame data/info. 1486 * 1487 * Send an action frame immediately without doing channel synchronization. 1488 * 1489 * This function waits for a completion event before returning. 1490 * The WLC_E_ACTION_FRAME_COMPLETE event will be received when the action 1491 * frame is transmitted. 1492 */ 1493 static s32 brcmf_p2p_tx_action_frame(struct brcmf_p2p_info *p2p, 1494 struct brcmf_fil_af_params_le *af_params) 1495 { 1496 struct brcmf_cfg80211_vif *vif; 1497 s32 err = 0; 1498 s32 timeout = 0; 1499 1500 brcmf_dbg(TRACE, "Enter\n"); 1501 1502 reinit_completion(&p2p->send_af_done); 1503 clear_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status); 1504 clear_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status); 1505 1506 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif; 1507 err = brcmf_fil_bsscfg_data_set(vif->ifp, "actframe", af_params, 1508 sizeof(*af_params)); 1509 if (err) { 1510 brcmf_err(" sending action frame has failed\n"); 1511 goto exit; 1512 } 1513 1514 p2p->af_sent_channel = le32_to_cpu(af_params->channel); 1515 p2p->af_tx_sent_jiffies = jiffies; 1516 1517 timeout = wait_for_completion_timeout(&p2p->send_af_done, 1518 P2P_AF_MAX_WAIT_TIME); 1519 1520 if (test_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status)) { 1521 brcmf_dbg(TRACE, "TX action frame operation is success\n"); 1522 } else { 1523 err = -EIO; 1524 brcmf_dbg(TRACE, "TX action frame operation has failed\n"); 1525 } 1526 /* clear status bit for action tx */ 1527 clear_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status); 1528 clear_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status); 1529 1530 exit: 1531 return err; 1532 } 1533 1534 1535 /** 1536 * brcmf_p2p_pub_af_tx() - public action frame tx routine. 1537 * 1538 * @cfg: driver private data for cfg80211 interface. 1539 * @af_params: action frame data/info. 1540 * @config_af_params: configuration data for action frame. 1541 * 1542 * routine which transmits ation frame public type. 1543 */ 1544 static s32 brcmf_p2p_pub_af_tx(struct brcmf_cfg80211_info *cfg, 1545 struct brcmf_fil_af_params_le *af_params, 1546 struct brcmf_config_af_params *config_af_params) 1547 { 1548 struct brcmf_p2p_info *p2p = &cfg->p2p; 1549 struct brcmf_fil_action_frame_le *action_frame; 1550 struct brcmf_p2p_pub_act_frame *act_frm; 1551 s32 err = 0; 1552 u16 ie_len; 1553 1554 action_frame = &af_params->action_frame; 1555 act_frm = (struct brcmf_p2p_pub_act_frame *)(action_frame->data); 1556 1557 config_af_params->extra_listen = true; 1558 1559 switch (act_frm->subtype) { 1560 case P2P_PAF_GON_REQ: 1561 brcmf_dbg(TRACE, "P2P: GO_NEG_PHASE status set\n"); 1562 set_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status); 1563 config_af_params->mpc_onoff = 0; 1564 config_af_params->search_channel = true; 1565 p2p->next_af_subtype = act_frm->subtype + 1; 1566 p2p->gon_req_action = true; 1567 /* increase dwell time to wait for RESP frame */ 1568 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME); 1569 break; 1570 case P2P_PAF_GON_RSP: 1571 p2p->next_af_subtype = act_frm->subtype + 1; 1572 /* increase dwell time to wait for CONF frame */ 1573 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME); 1574 break; 1575 case P2P_PAF_GON_CONF: 1576 /* If we reached till GO Neg confirmation reset the filter */ 1577 brcmf_dbg(TRACE, "P2P: GO_NEG_PHASE status cleared\n"); 1578 clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status); 1579 /* turn on mpc again if go nego is done */ 1580 config_af_params->mpc_onoff = 1; 1581 /* minimize dwell time */ 1582 af_params->dwell_time = cpu_to_le32(P2P_AF_MIN_DWELL_TIME); 1583 config_af_params->extra_listen = false; 1584 break; 1585 case P2P_PAF_INVITE_REQ: 1586 config_af_params->search_channel = true; 1587 p2p->next_af_subtype = act_frm->subtype + 1; 1588 /* increase dwell time */ 1589 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME); 1590 break; 1591 case P2P_PAF_INVITE_RSP: 1592 /* minimize dwell time */ 1593 af_params->dwell_time = cpu_to_le32(P2P_AF_MIN_DWELL_TIME); 1594 config_af_params->extra_listen = false; 1595 break; 1596 case P2P_PAF_DEVDIS_REQ: 1597 config_af_params->search_channel = true; 1598 p2p->next_af_subtype = act_frm->subtype + 1; 1599 /* maximize dwell time to wait for RESP frame */ 1600 af_params->dwell_time = cpu_to_le32(P2P_AF_LONG_DWELL_TIME); 1601 break; 1602 case P2P_PAF_DEVDIS_RSP: 1603 /* minimize dwell time */ 1604 af_params->dwell_time = cpu_to_le32(P2P_AF_MIN_DWELL_TIME); 1605 config_af_params->extra_listen = false; 1606 break; 1607 case P2P_PAF_PROVDIS_REQ: 1608 ie_len = le16_to_cpu(action_frame->len) - 1609 offsetof(struct brcmf_p2p_pub_act_frame, elts); 1610 if (cfg80211_get_p2p_attr(&act_frm->elts[0], ie_len, 1611 IEEE80211_P2P_ATTR_GROUP_ID, 1612 NULL, 0) < 0) 1613 config_af_params->search_channel = true; 1614 config_af_params->mpc_onoff = 0; 1615 p2p->next_af_subtype = act_frm->subtype + 1; 1616 /* increase dwell time to wait for RESP frame */ 1617 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME); 1618 break; 1619 case P2P_PAF_PROVDIS_RSP: 1620 /* wpa_supplicant send go nego req right after prov disc */ 1621 p2p->next_af_subtype = P2P_PAF_GON_REQ; 1622 /* increase dwell time to MED level */ 1623 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME); 1624 config_af_params->extra_listen = false; 1625 break; 1626 default: 1627 brcmf_err("Unknown p2p pub act frame subtype: %d\n", 1628 act_frm->subtype); 1629 err = -EINVAL; 1630 } 1631 return err; 1632 } 1633 1634 /** 1635 * brcmf_p2p_send_action_frame() - send action frame . 1636 * 1637 * @cfg: driver private data for cfg80211 interface. 1638 * @ndev: net device to transmit on. 1639 * @af_params: configuration data for action frame. 1640 */ 1641 bool brcmf_p2p_send_action_frame(struct brcmf_cfg80211_info *cfg, 1642 struct net_device *ndev, 1643 struct brcmf_fil_af_params_le *af_params) 1644 { 1645 struct brcmf_p2p_info *p2p = &cfg->p2p; 1646 struct brcmf_if *ifp = netdev_priv(ndev); 1647 struct brcmf_fil_action_frame_le *action_frame; 1648 struct brcmf_config_af_params config_af_params; 1649 struct afx_hdl *afx_hdl = &p2p->afx_hdl; 1650 u16 action_frame_len; 1651 bool ack = false; 1652 u8 category; 1653 u8 action; 1654 s32 tx_retry; 1655 s32 extra_listen_time; 1656 uint delta_ms; 1657 1658 action_frame = &af_params->action_frame; 1659 action_frame_len = le16_to_cpu(action_frame->len); 1660 1661 brcmf_p2p_print_actframe(true, action_frame->data, action_frame_len); 1662 1663 /* Add the default dwell time. Dwell time to stay off-channel */ 1664 /* to wait for a response action frame after transmitting an */ 1665 /* GO Negotiation action frame */ 1666 af_params->dwell_time = cpu_to_le32(P2P_AF_DWELL_TIME); 1667 1668 category = action_frame->data[DOT11_ACTION_CAT_OFF]; 1669 action = action_frame->data[DOT11_ACTION_ACT_OFF]; 1670 1671 /* initialize variables */ 1672 p2p->next_af_subtype = P2P_PAF_SUBTYPE_INVALID; 1673 p2p->gon_req_action = false; 1674 1675 /* config parameters */ 1676 config_af_params.mpc_onoff = -1; 1677 config_af_params.search_channel = false; 1678 config_af_params.extra_listen = false; 1679 1680 if (brcmf_p2p_is_pub_action(action_frame->data, action_frame_len)) { 1681 /* p2p public action frame process */ 1682 if (brcmf_p2p_pub_af_tx(cfg, af_params, &config_af_params)) { 1683 /* Just send unknown subtype frame with */ 1684 /* default parameters. */ 1685 brcmf_err("P2P Public action frame, unknown subtype.\n"); 1686 } 1687 } else if (brcmf_p2p_is_gas_action(action_frame->data, 1688 action_frame_len)) { 1689 /* service discovery process */ 1690 if (action == P2PSD_ACTION_ID_GAS_IREQ || 1691 action == P2PSD_ACTION_ID_GAS_CREQ) { 1692 /* configure service discovery query frame */ 1693 config_af_params.search_channel = true; 1694 1695 /* save next af suptype to cancel */ 1696 /* remaining dwell time */ 1697 p2p->next_af_subtype = action + 1; 1698 1699 af_params->dwell_time = 1700 cpu_to_le32(P2P_AF_MED_DWELL_TIME); 1701 } else if (action == P2PSD_ACTION_ID_GAS_IRESP || 1702 action == P2PSD_ACTION_ID_GAS_CRESP) { 1703 /* configure service discovery response frame */ 1704 af_params->dwell_time = 1705 cpu_to_le32(P2P_AF_MIN_DWELL_TIME); 1706 } else { 1707 brcmf_err("Unknown action type: %d\n", action); 1708 goto exit; 1709 } 1710 } else if (brcmf_p2p_is_p2p_action(action_frame->data, 1711 action_frame_len)) { 1712 /* do not configure anything. it will be */ 1713 /* sent with a default configuration */ 1714 } else { 1715 brcmf_err("Unknown Frame: category 0x%x, action 0x%x\n", 1716 category, action); 1717 return false; 1718 } 1719 1720 /* if connecting on primary iface, sleep for a while before sending 1721 * af tx for VSDB 1722 */ 1723 if (test_bit(BRCMF_VIF_STATUS_CONNECTING, 1724 &p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->sme_state)) 1725 msleep(50); 1726 1727 /* if scan is ongoing, abort current scan. */ 1728 if (test_bit(BRCMF_SCAN_STATUS_BUSY, &cfg->scan_status)) 1729 brcmf_abort_scanning(cfg); 1730 1731 memcpy(afx_hdl->tx_dst_addr, action_frame->da, ETH_ALEN); 1732 1733 /* To make sure to send successfully action frame, turn off mpc */ 1734 if (config_af_params.mpc_onoff == 0) 1735 brcmf_set_mpc(ifp, 0); 1736 1737 /* set status and destination address before sending af */ 1738 if (p2p->next_af_subtype != P2P_PAF_SUBTYPE_INVALID) { 1739 /* set status to cancel the remained dwell time in rx process */ 1740 set_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status); 1741 } 1742 1743 p2p->af_sent_channel = 0; 1744 set_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status); 1745 /* validate channel and p2p ies */ 1746 if (config_af_params.search_channel && 1747 IS_P2P_SOCIAL_CHANNEL(le32_to_cpu(af_params->channel)) && 1748 p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif->saved_ie.probe_req_ie_len) { 1749 afx_hdl = &p2p->afx_hdl; 1750 afx_hdl->peer_listen_chan = le32_to_cpu(af_params->channel); 1751 1752 if (brcmf_p2p_af_searching_channel(p2p) == 1753 P2P_INVALID_CHANNEL) { 1754 brcmf_err("Couldn't find peer's channel.\n"); 1755 goto exit; 1756 } 1757 1758 /* Abort scan even for VSDB scenarios. Scan gets aborted in 1759 * firmware but after the check of piggyback algorithm. To take 1760 * care of current piggback algo, lets abort the scan here 1761 * itself. 1762 */ 1763 brcmf_notify_escan_complete(cfg, ifp, true, true); 1764 1765 /* update channel */ 1766 af_params->channel = cpu_to_le32(afx_hdl->peer_chan); 1767 } 1768 1769 tx_retry = 0; 1770 while (!p2p->block_gon_req_tx && 1771 (ack == false) && (tx_retry < P2P_AF_TX_MAX_RETRY)) { 1772 ack = !brcmf_p2p_tx_action_frame(p2p, af_params); 1773 tx_retry++; 1774 } 1775 if (ack == false) { 1776 brcmf_err("Failed to send Action Frame(retry %d)\n", tx_retry); 1777 clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status); 1778 } 1779 1780 exit: 1781 clear_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status); 1782 1783 /* WAR: sometimes dongle does not keep the dwell time of 'actframe'. 1784 * if we coundn't get the next action response frame and dongle does 1785 * not keep the dwell time, go to listen state again to get next action 1786 * response frame. 1787 */ 1788 if (ack && config_af_params.extra_listen && !p2p->block_gon_req_tx && 1789 test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status) && 1790 p2p->af_sent_channel == afx_hdl->my_listen_chan) { 1791 delta_ms = jiffies_to_msecs(jiffies - p2p->af_tx_sent_jiffies); 1792 if (le32_to_cpu(af_params->dwell_time) > delta_ms) 1793 extra_listen_time = le32_to_cpu(af_params->dwell_time) - 1794 delta_ms; 1795 else 1796 extra_listen_time = 0; 1797 if (extra_listen_time > 50) { 1798 set_bit(BRCMF_P2P_STATUS_WAITING_NEXT_AF_LISTEN, 1799 &p2p->status); 1800 brcmf_dbg(INFO, "Wait more time! actual af time:%d, calculated extra listen:%d\n", 1801 le32_to_cpu(af_params->dwell_time), 1802 extra_listen_time); 1803 extra_listen_time += 100; 1804 if (!brcmf_p2p_discover_listen(p2p, 1805 p2p->af_sent_channel, 1806 extra_listen_time)) { 1807 unsigned long duration; 1808 1809 extra_listen_time += 100; 1810 duration = msecs_to_jiffies(extra_listen_time); 1811 wait_for_completion_timeout(&p2p->wait_next_af, 1812 duration); 1813 } 1814 clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_AF_LISTEN, 1815 &p2p->status); 1816 } 1817 } 1818 1819 if (p2p->block_gon_req_tx) { 1820 /* if ack is true, supplicant will wait more time(100ms). 1821 * so we will return it as a success to get more time . 1822 */ 1823 p2p->block_gon_req_tx = false; 1824 ack = true; 1825 } 1826 1827 clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status); 1828 /* if all done, turn mpc on again */ 1829 if (config_af_params.mpc_onoff == 1) 1830 brcmf_set_mpc(ifp, 1); 1831 1832 return ack; 1833 } 1834 1835 /** 1836 * brcmf_p2p_notify_rx_mgmt_p2p_probereq() - Event handler for p2p probe req. 1837 * 1838 * @ifp: interface pointer for which event was received. 1839 * @e: even message. 1840 * @data: payload of event message (probe request). 1841 */ 1842 s32 brcmf_p2p_notify_rx_mgmt_p2p_probereq(struct brcmf_if *ifp, 1843 const struct brcmf_event_msg *e, 1844 void *data) 1845 { 1846 struct brcmf_cfg80211_info *cfg = ifp->drvr->config; 1847 struct brcmf_p2p_info *p2p = &cfg->p2p; 1848 struct afx_hdl *afx_hdl = &p2p->afx_hdl; 1849 struct brcmf_cfg80211_vif *vif = ifp->vif; 1850 struct brcmf_rx_mgmt_data *rxframe = (struct brcmf_rx_mgmt_data *)data; 1851 u16 chanspec = be16_to_cpu(rxframe->chanspec); 1852 struct brcmu_chan ch; 1853 u8 *mgmt_frame; 1854 u32 mgmt_frame_len; 1855 s32 freq; 1856 u16 mgmt_type; 1857 1858 brcmf_dbg(INFO, "Enter: event %d reason %d\n", e->event_code, 1859 e->reason); 1860 1861 ch.chspec = be16_to_cpu(rxframe->chanspec); 1862 cfg->d11inf.decchspec(&ch); 1863 1864 if (test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status) && 1865 (ether_addr_equal(afx_hdl->tx_dst_addr, e->addr))) { 1866 afx_hdl->peer_chan = ch.chnum; 1867 brcmf_dbg(INFO, "PROBE REQUEST: Peer found, channel=%d\n", 1868 afx_hdl->peer_chan); 1869 complete(&afx_hdl->act_frm_scan); 1870 } 1871 1872 /* Firmware sends us two proberesponses for each idx one. At the */ 1873 /* moment anything but bsscfgidx 0 is passed up to supplicant */ 1874 if (e->bsscfgidx == 0) 1875 return 0; 1876 1877 /* Filter any P2P probe reqs arriving during the GO-NEG Phase */ 1878 if (test_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status)) { 1879 brcmf_dbg(INFO, "Filtering P2P probe_req in GO-NEG phase\n"); 1880 return 0; 1881 } 1882 1883 /* Check if wpa_supplicant has registered for this frame */ 1884 brcmf_dbg(INFO, "vif->mgmt_rx_reg %04x\n", vif->mgmt_rx_reg); 1885 mgmt_type = (IEEE80211_STYPE_PROBE_REQ & IEEE80211_FCTL_STYPE) >> 4; 1886 if ((vif->mgmt_rx_reg & BIT(mgmt_type)) == 0) 1887 return 0; 1888 1889 mgmt_frame = (u8 *)(rxframe + 1); 1890 mgmt_frame_len = e->datalen - sizeof(*rxframe); 1891 freq = ieee80211_channel_to_frequency(ch.chnum, 1892 ch.band == BRCMU_CHAN_BAND_2G ? 1893 IEEE80211_BAND_2GHZ : 1894 IEEE80211_BAND_5GHZ); 1895 1896 cfg80211_rx_mgmt(&vif->wdev, freq, 0, mgmt_frame, mgmt_frame_len, 0); 1897 1898 brcmf_dbg(INFO, "mgmt_frame_len (%d) , e->datalen (%d), chanspec (%04x), freq (%d)\n", 1899 mgmt_frame_len, e->datalen, chanspec, freq); 1900 1901 return 0; 1902 } 1903 1904 1905 /** 1906 * brcmf_p2p_get_current_chanspec() - Get current operation channel. 1907 * 1908 * @p2p: P2P specific data. 1909 * @chanspec: chanspec to be returned. 1910 */ 1911 static void brcmf_p2p_get_current_chanspec(struct brcmf_p2p_info *p2p, 1912 u16 *chanspec) 1913 { 1914 struct brcmf_if *ifp; 1915 u8 mac_addr[ETH_ALEN]; 1916 struct brcmu_chan ch; 1917 struct brcmf_bss_info_le *bi; 1918 u8 *buf; 1919 1920 ifp = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->ifp; 1921 1922 if (brcmf_fil_cmd_data_get(ifp, BRCMF_C_GET_BSSID, mac_addr, 1923 ETH_ALEN) == 0) { 1924 buf = kzalloc(WL_BSS_INFO_MAX, GFP_KERNEL); 1925 if (buf != NULL) { 1926 *(__le32 *)buf = cpu_to_le32(WL_BSS_INFO_MAX); 1927 if (brcmf_fil_cmd_data_get(ifp, BRCMF_C_GET_BSS_INFO, 1928 buf, WL_BSS_INFO_MAX) == 0) { 1929 bi = (struct brcmf_bss_info_le *)(buf + 4); 1930 *chanspec = le16_to_cpu(bi->chanspec); 1931 kfree(buf); 1932 return; 1933 } 1934 kfree(buf); 1935 } 1936 } 1937 /* Use default channel for P2P */ 1938 ch.chnum = BRCMF_P2P_TEMP_CHAN; 1939 ch.bw = BRCMU_CHAN_BW_20; 1940 p2p->cfg->d11inf.encchspec(&ch); 1941 *chanspec = ch.chspec; 1942 } 1943 1944 /** 1945 * Change a P2P Role. 1946 * Parameters: 1947 * @mac: MAC address of the BSS to change a role 1948 * Returns 0 if success. 1949 */ 1950 int brcmf_p2p_ifchange(struct brcmf_cfg80211_info *cfg, 1951 enum brcmf_fil_p2p_if_types if_type) 1952 { 1953 struct brcmf_p2p_info *p2p = &cfg->p2p; 1954 struct brcmf_cfg80211_vif *vif; 1955 struct brcmf_fil_p2p_if_le if_request; 1956 s32 err; 1957 u16 chanspec; 1958 1959 brcmf_dbg(TRACE, "Enter\n"); 1960 1961 vif = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif; 1962 if (!vif) { 1963 brcmf_err("vif for P2PAPI_BSSCFG_PRIMARY does not exist\n"); 1964 return -EPERM; 1965 } 1966 brcmf_notify_escan_complete(cfg, vif->ifp, true, true); 1967 vif = p2p->bss_idx[P2PAPI_BSSCFG_CONNECTION].vif; 1968 if (!vif) { 1969 brcmf_err("vif for P2PAPI_BSSCFG_CONNECTION does not exist\n"); 1970 return -EPERM; 1971 } 1972 brcmf_set_mpc(vif->ifp, 0); 1973 1974 /* In concurrency case, STA may be already associated in a particular */ 1975 /* channel. so retrieve the current channel of primary interface and */ 1976 /* then start the virtual interface on that. */ 1977 brcmf_p2p_get_current_chanspec(p2p, &chanspec); 1978 1979 if_request.type = cpu_to_le16((u16)if_type); 1980 if_request.chspec = cpu_to_le16(chanspec); 1981 memcpy(if_request.addr, p2p->int_addr, sizeof(if_request.addr)); 1982 1983 brcmf_cfg80211_arm_vif_event(cfg, vif); 1984 err = brcmf_fil_iovar_data_set(vif->ifp, "p2p_ifupd", &if_request, 1985 sizeof(if_request)); 1986 if (err) { 1987 brcmf_err("p2p_ifupd FAILED, err=%d\n", err); 1988 brcmf_cfg80211_arm_vif_event(cfg, NULL); 1989 return err; 1990 } 1991 err = brcmf_cfg80211_wait_vif_event_timeout(cfg, BRCMF_E_IF_CHANGE, 1992 BRCMF_VIF_EVENT_TIMEOUT); 1993 brcmf_cfg80211_arm_vif_event(cfg, NULL); 1994 if (!err) { 1995 brcmf_err("No BRCMF_E_IF_CHANGE event received\n"); 1996 return -EIO; 1997 } 1998 1999 err = brcmf_fil_cmd_int_set(vif->ifp, BRCMF_C_SET_SCB_TIMEOUT, 2000 BRCMF_SCB_TIMEOUT_VALUE); 2001 2002 return err; 2003 } 2004 2005 static int brcmf_p2p_request_p2p_if(struct brcmf_p2p_info *p2p, 2006 struct brcmf_if *ifp, u8 ea[ETH_ALEN], 2007 enum brcmf_fil_p2p_if_types iftype) 2008 { 2009 struct brcmf_fil_p2p_if_le if_request; 2010 int err; 2011 u16 chanspec; 2012 2013 /* we need a default channel */ 2014 brcmf_p2p_get_current_chanspec(p2p, &chanspec); 2015 2016 /* fill the firmware request */ 2017 memcpy(if_request.addr, ea, ETH_ALEN); 2018 if_request.type = cpu_to_le16((u16)iftype); 2019 if_request.chspec = cpu_to_le16(chanspec); 2020 2021 err = brcmf_fil_iovar_data_set(ifp, "p2p_ifadd", &if_request, 2022 sizeof(if_request)); 2023 if (err) 2024 return err; 2025 2026 return err; 2027 } 2028 2029 static int brcmf_p2p_disable_p2p_if(struct brcmf_cfg80211_vif *vif) 2030 { 2031 struct brcmf_cfg80211_info *cfg = wdev_to_cfg(&vif->wdev); 2032 struct net_device *pri_ndev = cfg_to_ndev(cfg); 2033 struct brcmf_if *ifp = netdev_priv(pri_ndev); 2034 u8 *addr = vif->wdev.netdev->dev_addr; 2035 2036 return brcmf_fil_iovar_data_set(ifp, "p2p_ifdis", addr, ETH_ALEN); 2037 } 2038 2039 static int brcmf_p2p_release_p2p_if(struct brcmf_cfg80211_vif *vif) 2040 { 2041 struct brcmf_cfg80211_info *cfg = wdev_to_cfg(&vif->wdev); 2042 struct net_device *pri_ndev = cfg_to_ndev(cfg); 2043 struct brcmf_if *ifp = netdev_priv(pri_ndev); 2044 u8 *addr = vif->wdev.netdev->dev_addr; 2045 2046 return brcmf_fil_iovar_data_set(ifp, "p2p_ifdel", addr, ETH_ALEN); 2047 } 2048 2049 /** 2050 * brcmf_p2p_create_p2pdev() - create a P2P_DEVICE virtual interface. 2051 * 2052 * @p2p: P2P specific data. 2053 * @wiphy: wiphy device of new interface. 2054 * @addr: mac address for this new interface. 2055 */ 2056 static struct wireless_dev *brcmf_p2p_create_p2pdev(struct brcmf_p2p_info *p2p, 2057 struct wiphy *wiphy, 2058 u8 *addr) 2059 { 2060 struct brcmf_cfg80211_vif *p2p_vif; 2061 struct brcmf_if *p2p_ifp; 2062 struct brcmf_if *pri_ifp; 2063 int err; 2064 u32 bsscfgidx; 2065 2066 if (p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif) 2067 return ERR_PTR(-ENOSPC); 2068 2069 p2p_vif = brcmf_alloc_vif(p2p->cfg, NL80211_IFTYPE_P2P_DEVICE, 2070 false); 2071 if (IS_ERR(p2p_vif)) { 2072 brcmf_err("could not create discovery vif\n"); 2073 return (struct wireless_dev *)p2p_vif; 2074 } 2075 2076 pri_ifp = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->ifp; 2077 brcmf_p2p_generate_bss_mac(p2p, addr); 2078 brcmf_p2p_set_firmware(pri_ifp, p2p->dev_addr); 2079 2080 brcmf_cfg80211_arm_vif_event(p2p->cfg, p2p_vif); 2081 brcmf_fweh_p2pdev_setup(pri_ifp, true); 2082 2083 /* Initialize P2P Discovery in the firmware */ 2084 err = brcmf_fil_iovar_int_set(pri_ifp, "p2p_disc", 1); 2085 if (err < 0) { 2086 brcmf_err("set p2p_disc error\n"); 2087 brcmf_fweh_p2pdev_setup(pri_ifp, false); 2088 brcmf_cfg80211_arm_vif_event(p2p->cfg, NULL); 2089 goto fail; 2090 } 2091 2092 /* wait for firmware event */ 2093 err = brcmf_cfg80211_wait_vif_event_timeout(p2p->cfg, BRCMF_E_IF_ADD, 2094 BRCMF_VIF_EVENT_TIMEOUT); 2095 brcmf_cfg80211_arm_vif_event(p2p->cfg, NULL); 2096 brcmf_fweh_p2pdev_setup(pri_ifp, false); 2097 if (!err) { 2098 brcmf_err("timeout occurred\n"); 2099 err = -EIO; 2100 goto fail; 2101 } 2102 2103 /* discovery interface created */ 2104 p2p_ifp = p2p_vif->ifp; 2105 p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif = p2p_vif; 2106 memcpy(p2p_ifp->mac_addr, p2p->dev_addr, ETH_ALEN); 2107 memcpy(&p2p_vif->wdev.address, p2p->dev_addr, sizeof(p2p->dev_addr)); 2108 2109 /* verify bsscfg index for P2P discovery */ 2110 err = brcmf_fil_iovar_int_get(pri_ifp, "p2p_dev", &bsscfgidx); 2111 if (err < 0) { 2112 brcmf_err("retrieving discover bsscfg index failed\n"); 2113 goto fail; 2114 } 2115 2116 WARN_ON(p2p_ifp->bsscfgidx != bsscfgidx); 2117 2118 init_completion(&p2p->send_af_done); 2119 INIT_WORK(&p2p->afx_hdl.afx_work, brcmf_p2p_afx_handler); 2120 init_completion(&p2p->afx_hdl.act_frm_scan); 2121 init_completion(&p2p->wait_next_af); 2122 2123 return &p2p_vif->wdev; 2124 2125 fail: 2126 brcmf_free_vif(p2p_vif); 2127 return ERR_PTR(err); 2128 } 2129 2130 /** 2131 * brcmf_p2p_add_vif() - create a new P2P virtual interface. 2132 * 2133 * @wiphy: wiphy device of new interface. 2134 * @name: name of the new interface. 2135 * @name_assign_type: origin of the interface name 2136 * @type: nl80211 interface type. 2137 * @flags: not used. 2138 * @params: contains mac address for P2P device. 2139 */ 2140 struct wireless_dev *brcmf_p2p_add_vif(struct wiphy *wiphy, const char *name, 2141 unsigned char name_assign_type, 2142 enum nl80211_iftype type, u32 *flags, 2143 struct vif_params *params) 2144 { 2145 struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy); 2146 struct brcmf_if *ifp = netdev_priv(cfg_to_ndev(cfg)); 2147 struct brcmf_cfg80211_vif *vif; 2148 enum brcmf_fil_p2p_if_types iftype; 2149 int err; 2150 2151 if (brcmf_cfg80211_vif_event_armed(cfg)) 2152 return ERR_PTR(-EBUSY); 2153 2154 brcmf_dbg(INFO, "adding vif \"%s\" (type=%d)\n", name, type); 2155 2156 switch (type) { 2157 case NL80211_IFTYPE_P2P_CLIENT: 2158 iftype = BRCMF_FIL_P2P_IF_CLIENT; 2159 break; 2160 case NL80211_IFTYPE_P2P_GO: 2161 iftype = BRCMF_FIL_P2P_IF_GO; 2162 break; 2163 case NL80211_IFTYPE_P2P_DEVICE: 2164 return brcmf_p2p_create_p2pdev(&cfg->p2p, wiphy, 2165 params->macaddr); 2166 default: 2167 return ERR_PTR(-EOPNOTSUPP); 2168 } 2169 2170 vif = brcmf_alloc_vif(cfg, type, false); 2171 if (IS_ERR(vif)) 2172 return (struct wireless_dev *)vif; 2173 brcmf_cfg80211_arm_vif_event(cfg, vif); 2174 2175 err = brcmf_p2p_request_p2p_if(&cfg->p2p, ifp, cfg->p2p.int_addr, 2176 iftype); 2177 if (err) { 2178 brcmf_cfg80211_arm_vif_event(cfg, NULL); 2179 goto fail; 2180 } 2181 2182 /* wait for firmware event */ 2183 err = brcmf_cfg80211_wait_vif_event_timeout(cfg, BRCMF_E_IF_ADD, 2184 BRCMF_VIF_EVENT_TIMEOUT); 2185 brcmf_cfg80211_arm_vif_event(cfg, NULL); 2186 if (!err) { 2187 brcmf_err("timeout occurred\n"); 2188 err = -EIO; 2189 goto fail; 2190 } 2191 2192 /* interface created in firmware */ 2193 ifp = vif->ifp; 2194 if (!ifp) { 2195 brcmf_err("no if pointer provided\n"); 2196 err = -ENOENT; 2197 goto fail; 2198 } 2199 2200 strncpy(ifp->ndev->name, name, sizeof(ifp->ndev->name) - 1); 2201 ifp->ndev->name_assign_type = name_assign_type; 2202 err = brcmf_net_attach(ifp, true); 2203 if (err) { 2204 brcmf_err("Registering netdevice failed\n"); 2205 goto fail; 2206 } 2207 2208 cfg->p2p.bss_idx[P2PAPI_BSSCFG_CONNECTION].vif = vif; 2209 /* Disable firmware roaming for P2P interface */ 2210 brcmf_fil_iovar_int_set(ifp, "roam_off", 1); 2211 if (iftype == BRCMF_FIL_P2P_IF_GO) { 2212 /* set station timeout for p2p */ 2213 brcmf_fil_cmd_int_set(ifp, BRCMF_C_SET_SCB_TIMEOUT, 2214 BRCMF_SCB_TIMEOUT_VALUE); 2215 } 2216 return &ifp->vif->wdev; 2217 2218 fail: 2219 brcmf_free_vif(vif); 2220 return ERR_PTR(err); 2221 } 2222 2223 /** 2224 * brcmf_p2p_del_vif() - delete a P2P virtual interface. 2225 * 2226 * @wiphy: wiphy device of interface. 2227 * @wdev: wireless device of interface. 2228 */ 2229 int brcmf_p2p_del_vif(struct wiphy *wiphy, struct wireless_dev *wdev) 2230 { 2231 struct brcmf_cfg80211_info *cfg = wiphy_priv(wiphy); 2232 struct brcmf_p2p_info *p2p = &cfg->p2p; 2233 struct brcmf_cfg80211_vif *vif; 2234 bool wait_for_disable = false; 2235 int err; 2236 2237 brcmf_dbg(TRACE, "delete P2P vif\n"); 2238 vif = container_of(wdev, struct brcmf_cfg80211_vif, wdev); 2239 2240 brcmf_cfg80211_arm_vif_event(cfg, vif); 2241 switch (vif->wdev.iftype) { 2242 case NL80211_IFTYPE_P2P_CLIENT: 2243 if (test_bit(BRCMF_VIF_STATUS_DISCONNECTING, &vif->sme_state)) 2244 wait_for_disable = true; 2245 break; 2246 2247 case NL80211_IFTYPE_P2P_GO: 2248 if (!brcmf_p2p_disable_p2p_if(vif)) 2249 wait_for_disable = true; 2250 break; 2251 2252 case NL80211_IFTYPE_P2P_DEVICE: 2253 if (!p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif) 2254 return 0; 2255 brcmf_p2p_cancel_remain_on_channel(vif->ifp); 2256 brcmf_p2p_deinit_discovery(p2p); 2257 default: 2258 return -ENOTSUPP; 2259 } 2260 2261 clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status); 2262 brcmf_dbg(INFO, "P2P: GO_NEG_PHASE status cleared\n"); 2263 2264 if (wait_for_disable) 2265 wait_for_completion_timeout(&cfg->vif_disabled, 2266 BRCMF_P2P_DISABLE_TIMEOUT); 2267 2268 err = 0; 2269 if (vif->wdev.iftype != NL80211_IFTYPE_P2P_DEVICE) { 2270 brcmf_vif_clear_mgmt_ies(vif); 2271 err = brcmf_p2p_release_p2p_if(vif); 2272 } 2273 if (!err) { 2274 /* wait for firmware event */ 2275 err = brcmf_cfg80211_wait_vif_event_timeout(cfg, BRCMF_E_IF_DEL, 2276 BRCMF_VIF_EVENT_TIMEOUT); 2277 if (!err) 2278 err = -EIO; 2279 else 2280 err = 0; 2281 } 2282 if (err) 2283 brcmf_remove_interface(vif->ifp); 2284 2285 brcmf_cfg80211_arm_vif_event(cfg, NULL); 2286 if (vif->wdev.iftype != NL80211_IFTYPE_P2P_DEVICE) 2287 p2p->bss_idx[P2PAPI_BSSCFG_CONNECTION].vif = NULL; 2288 2289 return err; 2290 } 2291 2292 void brcmf_p2p_ifp_removed(struct brcmf_if *ifp) 2293 { 2294 struct brcmf_cfg80211_info *cfg; 2295 struct brcmf_cfg80211_vif *vif; 2296 2297 brcmf_dbg(INFO, "P2P: device interface removed\n"); 2298 vif = ifp->vif; 2299 cfg = wdev_to_cfg(&vif->wdev); 2300 cfg->p2p.bss_idx[P2PAPI_BSSCFG_DEVICE].vif = NULL; 2301 rtnl_lock(); 2302 cfg80211_unregister_wdev(&vif->wdev); 2303 rtnl_unlock(); 2304 brcmf_free_vif(vif); 2305 } 2306 2307 int brcmf_p2p_start_device(struct wiphy *wiphy, struct wireless_dev *wdev) 2308 { 2309 struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy); 2310 struct brcmf_p2p_info *p2p = &cfg->p2p; 2311 struct brcmf_cfg80211_vif *vif; 2312 int err; 2313 2314 vif = container_of(wdev, struct brcmf_cfg80211_vif, wdev); 2315 mutex_lock(&cfg->usr_sync); 2316 err = brcmf_p2p_enable_discovery(p2p); 2317 if (!err) 2318 set_bit(BRCMF_VIF_STATUS_READY, &vif->sme_state); 2319 mutex_unlock(&cfg->usr_sync); 2320 return err; 2321 } 2322 2323 void brcmf_p2p_stop_device(struct wiphy *wiphy, struct wireless_dev *wdev) 2324 { 2325 struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy); 2326 struct brcmf_p2p_info *p2p = &cfg->p2p; 2327 struct brcmf_cfg80211_vif *vif; 2328 2329 vif = container_of(wdev, struct brcmf_cfg80211_vif, wdev); 2330 /* This call can be result of the unregister_wdev call. In that case 2331 * we dont want to do anything anymore. Just return. The config vif 2332 * will have been cleared at this point. 2333 */ 2334 if (p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif == vif) { 2335 mutex_lock(&cfg->usr_sync); 2336 /* Set the discovery state to SCAN */ 2337 (void)brcmf_p2p_set_discover_state(vif->ifp, 2338 WL_P2P_DISC_ST_SCAN, 0, 0); 2339 brcmf_abort_scanning(cfg); 2340 clear_bit(BRCMF_VIF_STATUS_READY, &vif->sme_state); 2341 mutex_unlock(&cfg->usr_sync); 2342 } 2343 } 2344 2345 /** 2346 * brcmf_p2p_attach() - attach for P2P. 2347 * 2348 * @cfg: driver private data for cfg80211 interface. 2349 * @p2pdev_forced: create p2p device interface at attach. 2350 */ 2351 s32 brcmf_p2p_attach(struct brcmf_cfg80211_info *cfg, bool p2pdev_forced) 2352 { 2353 struct brcmf_p2p_info *p2p; 2354 struct brcmf_if *pri_ifp; 2355 s32 err = 0; 2356 void *err_ptr; 2357 2358 p2p = &cfg->p2p; 2359 p2p->cfg = cfg; 2360 2361 pri_ifp = brcmf_get_ifp(cfg->pub, 0); 2362 p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif = pri_ifp->vif; 2363 2364 if (p2pdev_forced) { 2365 err_ptr = brcmf_p2p_create_p2pdev(p2p, NULL, NULL); 2366 if (IS_ERR(err_ptr)) { 2367 brcmf_err("P2P device creation failed.\n"); 2368 err = PTR_ERR(err_ptr); 2369 } 2370 } else { 2371 p2p->p2pdev_dynamically = true; 2372 } 2373 return err; 2374 } 2375 2376 /** 2377 * brcmf_p2p_detach() - detach P2P. 2378 * 2379 * @p2p: P2P specific data. 2380 */ 2381 void brcmf_p2p_detach(struct brcmf_p2p_info *p2p) 2382 { 2383 struct brcmf_cfg80211_vif *vif; 2384 2385 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif; 2386 if (vif != NULL) { 2387 brcmf_p2p_cancel_remain_on_channel(vif->ifp); 2388 brcmf_p2p_deinit_discovery(p2p); 2389 brcmf_remove_interface(vif->ifp); 2390 } 2391 /* just set it all to zero */ 2392 memset(p2p, 0, sizeof(*p2p)); 2393 } 2394 2395