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 <net/cfg80211.h> 20 21#include <brcmu_wifi.h> 22#include <brcmu_utils.h> 23#include <defs.h> 24#include "core.h" 25#include "debug.h" 26#include "fwil.h" 27#include "fwil_types.h" 28#include "p2p.h" 29#include "cfg80211.h" 30 31/* parameters used for p2p escan */ 32#define P2PAPI_SCAN_NPROBES 1 33#define P2PAPI_SCAN_DWELL_TIME_MS 80 34#define P2PAPI_SCAN_SOCIAL_DWELL_TIME_MS 40 35#define P2PAPI_SCAN_HOME_TIME_MS 60 36#define P2PAPI_SCAN_NPROBS_TIME_MS 30 37#define P2PAPI_SCAN_AF_SEARCH_DWELL_TIME_MS 100 38#define WL_SCAN_CONNECT_DWELL_TIME_MS 200 39#define WL_SCAN_JOIN_PROBE_INTERVAL_MS 20 40 41#define BRCMF_P2P_WILDCARD_SSID "DIRECT-" 42#define BRCMF_P2P_WILDCARD_SSID_LEN (sizeof(BRCMF_P2P_WILDCARD_SSID) - 1) 43 44#define SOCIAL_CHAN_1 1 45#define SOCIAL_CHAN_2 6 46#define SOCIAL_CHAN_3 11 47#define IS_P2P_SOCIAL_CHANNEL(channel) ((channel == SOCIAL_CHAN_1) || \ 48 (channel == SOCIAL_CHAN_2) || \ 49 (channel == SOCIAL_CHAN_3)) 50#define BRCMF_P2P_TEMP_CHAN SOCIAL_CHAN_3 51#define SOCIAL_CHAN_CNT 3 52#define AF_PEER_SEARCH_CNT 2 53 54#define BRCMF_SCB_TIMEOUT_VALUE 20 55 56#define P2P_VER 9 /* P2P version: 9=WiFi P2P v1.0 */ 57#define P2P_PUB_AF_CATEGORY 0x04 58#define P2P_PUB_AF_ACTION 0x09 59#define P2P_AF_CATEGORY 0x7f 60#define P2P_OUI "\x50\x6F\x9A" /* P2P OUI */ 61#define P2P_OUI_LEN 3 /* P2P OUI length */ 62 63/* Action Frame Constants */ 64#define DOT11_ACTION_HDR_LEN 2 /* action frame category + action */ 65#define DOT11_ACTION_CAT_OFF 0 /* category offset */ 66#define DOT11_ACTION_ACT_OFF 1 /* action offset */ 67 68#define P2P_AF_DWELL_TIME 200 69#define P2P_AF_MIN_DWELL_TIME 100 70#define P2P_AF_MED_DWELL_TIME 400 71#define P2P_AF_LONG_DWELL_TIME 1000 72#define P2P_AF_TX_MAX_RETRY 1 73#define P2P_AF_MAX_WAIT_TIME 2000 74#define P2P_INVALID_CHANNEL -1 75#define P2P_CHANNEL_SYNC_RETRY 5 76#define P2P_AF_FRM_SCAN_MAX_WAIT 1500 77#define P2P_DEFAULT_SLEEP_TIME_VSDB 200 78 79/* WiFi P2P Public Action Frame OUI Subtypes */ 80#define P2P_PAF_GON_REQ 0 /* Group Owner Negotiation Req */ 81#define P2P_PAF_GON_RSP 1 /* Group Owner Negotiation Rsp */ 82#define P2P_PAF_GON_CONF 2 /* Group Owner Negotiation Confirm */ 83#define P2P_PAF_INVITE_REQ 3 /* P2P Invitation Request */ 84#define P2P_PAF_INVITE_RSP 4 /* P2P Invitation Response */ 85#define P2P_PAF_DEVDIS_REQ 5 /* Device Discoverability Request */ 86#define P2P_PAF_DEVDIS_RSP 6 /* Device Discoverability Response */ 87#define P2P_PAF_PROVDIS_REQ 7 /* Provision Discovery Request */ 88#define P2P_PAF_PROVDIS_RSP 8 /* Provision Discovery Response */ 89#define P2P_PAF_SUBTYPE_INVALID 255 /* Invalid Subtype */ 90 91/* WiFi P2P Action Frame OUI Subtypes */ 92#define P2P_AF_NOTICE_OF_ABSENCE 0 /* Notice of Absence */ 93#define P2P_AF_PRESENCE_REQ 1 /* P2P Presence Request */ 94#define P2P_AF_PRESENCE_RSP 2 /* P2P Presence Response */ 95#define P2P_AF_GO_DISC_REQ 3 /* GO Discoverability Request */ 96 97/* P2P Service Discovery related */ 98#define P2PSD_ACTION_CATEGORY 0x04 /* Public action frame */ 99#define P2PSD_ACTION_ID_GAS_IREQ 0x0a /* GAS Initial Request AF */ 100#define P2PSD_ACTION_ID_GAS_IRESP 0x0b /* GAS Initial Response AF */ 101#define P2PSD_ACTION_ID_GAS_CREQ 0x0c /* GAS Comback Request AF */ 102#define P2PSD_ACTION_ID_GAS_CRESP 0x0d /* GAS Comback Response AF */ 103 104/** 105 * struct brcmf_p2p_disc_st_le - set discovery state in firmware. 106 * 107 * @state: requested discovery state (see enum brcmf_p2p_disc_state). 108 * @chspec: channel parameter for %WL_P2P_DISC_ST_LISTEN state. 109 * @dwell: dwell time in ms for %WL_P2P_DISC_ST_LISTEN state. 110 */ 111struct brcmf_p2p_disc_st_le { 112 u8 state; 113 __le16 chspec; 114 __le16 dwell; 115}; 116 117/** 118 * enum brcmf_p2p_disc_state - P2P discovery state values 119 * 120 * @WL_P2P_DISC_ST_SCAN: P2P discovery with wildcard SSID and P2P IE. 121 * @WL_P2P_DISC_ST_LISTEN: P2P discovery off-channel for specified time. 122 * @WL_P2P_DISC_ST_SEARCH: P2P discovery with P2P wildcard SSID and P2P IE. 123 */ 124enum brcmf_p2p_disc_state { 125 WL_P2P_DISC_ST_SCAN, 126 WL_P2P_DISC_ST_LISTEN, 127 WL_P2P_DISC_ST_SEARCH 128}; 129 130/** 131 * struct brcmf_p2p_scan_le - P2P specific scan request. 132 * 133 * @type: type of scan method requested (values: 'E' or 'S'). 134 * @reserved: reserved (ignored). 135 * @eparams: parameters used for type 'E'. 136 * @sparams: parameters used for type 'S'. 137 */ 138struct brcmf_p2p_scan_le { 139 u8 type; 140 u8 reserved[3]; 141 union { 142 struct brcmf_escan_params_le eparams; 143 struct brcmf_scan_params_le sparams; 144 }; 145}; 146 147/** 148 * struct brcmf_p2p_pub_act_frame - WiFi P2P Public Action Frame 149 * 150 * @category: P2P_PUB_AF_CATEGORY 151 * @action: P2P_PUB_AF_ACTION 152 * @oui[3]: P2P_OUI 153 * @oui_type: OUI type - P2P_VER 154 * @subtype: OUI subtype - P2P_TYPE_* 155 * @dialog_token: nonzero, identifies req/rsp transaction 156 * @elts[1]: Variable length information elements. 157 */ 158struct brcmf_p2p_pub_act_frame { 159 u8 category; 160 u8 action; 161 u8 oui[3]; 162 u8 oui_type; 163 u8 subtype; 164 u8 dialog_token; 165 u8 elts[1]; 166}; 167 168/** 169 * struct brcmf_p2p_action_frame - WiFi P2P Action Frame 170 * 171 * @category: P2P_AF_CATEGORY 172 * @OUI[3]: OUI - P2P_OUI 173 * @type: OUI Type - P2P_VER 174 * @subtype: OUI Subtype - P2P_AF_* 175 * @dialog_token: nonzero, identifies req/resp tranaction 176 * @elts[1]: Variable length information elements. 177 */ 178struct brcmf_p2p_action_frame { 179 u8 category; 180 u8 oui[3]; 181 u8 type; 182 u8 subtype; 183 u8 dialog_token; 184 u8 elts[1]; 185}; 186 187/** 188 * struct brcmf_p2psd_gas_pub_act_frame - Wi-Fi GAS Public Action Frame 189 * 190 * @category: 0x04 Public Action Frame 191 * @action: 0x6c Advertisement Protocol 192 * @dialog_token: nonzero, identifies req/rsp transaction 193 * @query_data[1]: Query Data. SD gas ireq SD gas iresp 194 */ 195struct brcmf_p2psd_gas_pub_act_frame { 196 u8 category; 197 u8 action; 198 u8 dialog_token; 199 u8 query_data[1]; 200}; 201 202/** 203 * struct brcmf_config_af_params - Action Frame Parameters for tx. 204 * 205 * @mpc_onoff: To make sure to send successfully action frame, we have to 206 * turn off mpc 0: off, 1: on, (-1): do nothing 207 * @search_channel: 1: search peer's channel to send af 208 * extra_listen: keep the dwell time to get af response frame. 209 */ 210struct brcmf_config_af_params { 211 s32 mpc_onoff; 212 bool search_channel; 213 bool extra_listen; 214}; 215 216/** 217 * brcmf_p2p_is_pub_action() - true if p2p public type frame. 218 * 219 * @frame: action frame data. 220 * @frame_len: length of action frame data. 221 * 222 * Determine if action frame is p2p public action type 223 */ 224static bool brcmf_p2p_is_pub_action(void *frame, u32 frame_len) 225{ 226 struct brcmf_p2p_pub_act_frame *pact_frm; 227 228 if (frame == NULL) 229 return false; 230 231 pact_frm = (struct brcmf_p2p_pub_act_frame *)frame; 232 if (frame_len < sizeof(struct brcmf_p2p_pub_act_frame) - 1) 233 return false; 234 235 if (pact_frm->category == P2P_PUB_AF_CATEGORY && 236 pact_frm->action == P2P_PUB_AF_ACTION && 237 pact_frm->oui_type == P2P_VER && 238 memcmp(pact_frm->oui, P2P_OUI, P2P_OUI_LEN) == 0) 239 return true; 240 241 return false; 242} 243 244/** 245 * brcmf_p2p_is_p2p_action() - true if p2p action type frame. 246 * 247 * @frame: action frame data. 248 * @frame_len: length of action frame data. 249 * 250 * Determine if action frame is p2p action type 251 */ 252static bool brcmf_p2p_is_p2p_action(void *frame, u32 frame_len) 253{ 254 struct brcmf_p2p_action_frame *act_frm; 255 256 if (frame == NULL) 257 return false; 258 259 act_frm = (struct brcmf_p2p_action_frame *)frame; 260 if (frame_len < sizeof(struct brcmf_p2p_action_frame) - 1) 261 return false; 262 263 if (act_frm->category == P2P_AF_CATEGORY && 264 act_frm->type == P2P_VER && 265 memcmp(act_frm->oui, P2P_OUI, P2P_OUI_LEN) == 0) 266 return true; 267 268 return false; 269} 270 271/** 272 * brcmf_p2p_is_gas_action() - true if p2p gas action type frame. 273 * 274 * @frame: action frame data. 275 * @frame_len: length of action frame data. 276 * 277 * Determine if action frame is p2p gas action type 278 */ 279static bool brcmf_p2p_is_gas_action(void *frame, u32 frame_len) 280{ 281 struct brcmf_p2psd_gas_pub_act_frame *sd_act_frm; 282 283 if (frame == NULL) 284 return false; 285 286 sd_act_frm = (struct brcmf_p2psd_gas_pub_act_frame *)frame; 287 if (frame_len < sizeof(struct brcmf_p2psd_gas_pub_act_frame) - 1) 288 return false; 289 290 if (sd_act_frm->category != P2PSD_ACTION_CATEGORY) 291 return false; 292 293 if (sd_act_frm->action == P2PSD_ACTION_ID_GAS_IREQ || 294 sd_act_frm->action == P2PSD_ACTION_ID_GAS_IRESP || 295 sd_act_frm->action == P2PSD_ACTION_ID_GAS_CREQ || 296 sd_act_frm->action == P2PSD_ACTION_ID_GAS_CRESP) 297 return true; 298 299 return false; 300} 301 302/** 303 * brcmf_p2p_print_actframe() - debug print routine. 304 * 305 * @tx: Received or to be transmitted 306 * @frame: action frame data. 307 * @frame_len: length of action frame data. 308 * 309 * Print information about the p2p action frame 310 */ 311 312#ifdef DEBUG 313 314static void brcmf_p2p_print_actframe(bool tx, void *frame, u32 frame_len) 315{ 316 struct brcmf_p2p_pub_act_frame *pact_frm; 317 struct brcmf_p2p_action_frame *act_frm; 318 struct brcmf_p2psd_gas_pub_act_frame *sd_act_frm; 319 320 if (!frame || frame_len <= 2) 321 return; 322 323 if (brcmf_p2p_is_pub_action(frame, frame_len)) { 324 pact_frm = (struct brcmf_p2p_pub_act_frame *)frame; 325 switch (pact_frm->subtype) { 326 case P2P_PAF_GON_REQ: 327 brcmf_dbg(TRACE, "%s P2P Group Owner Negotiation Req Frame\n", 328 (tx) ? "TX" : "RX"); 329 break; 330 case P2P_PAF_GON_RSP: 331 brcmf_dbg(TRACE, "%s P2P Group Owner Negotiation Rsp Frame\n", 332 (tx) ? "TX" : "RX"); 333 break; 334 case P2P_PAF_GON_CONF: 335 brcmf_dbg(TRACE, "%s P2P Group Owner Negotiation Confirm Frame\n", 336 (tx) ? "TX" : "RX"); 337 break; 338 case P2P_PAF_INVITE_REQ: 339 brcmf_dbg(TRACE, "%s P2P Invitation Request Frame\n", 340 (tx) ? "TX" : "RX"); 341 break; 342 case P2P_PAF_INVITE_RSP: 343 brcmf_dbg(TRACE, "%s P2P Invitation Response Frame\n", 344 (tx) ? "TX" : "RX"); 345 break; 346 case P2P_PAF_DEVDIS_REQ: 347 brcmf_dbg(TRACE, "%s P2P Device Discoverability Request Frame\n", 348 (tx) ? "TX" : "RX"); 349 break; 350 case P2P_PAF_DEVDIS_RSP: 351 brcmf_dbg(TRACE, "%s P2P Device Discoverability Response Frame\n", 352 (tx) ? "TX" : "RX"); 353 break; 354 case P2P_PAF_PROVDIS_REQ: 355 brcmf_dbg(TRACE, "%s P2P Provision Discovery Request Frame\n", 356 (tx) ? "TX" : "RX"); 357 break; 358 case P2P_PAF_PROVDIS_RSP: 359 brcmf_dbg(TRACE, "%s P2P Provision Discovery Response Frame\n", 360 (tx) ? "TX" : "RX"); 361 break; 362 default: 363 brcmf_dbg(TRACE, "%s Unknown P2P Public Action Frame\n", 364 (tx) ? "TX" : "RX"); 365 break; 366 } 367 } else if (brcmf_p2p_is_p2p_action(frame, frame_len)) { 368 act_frm = (struct brcmf_p2p_action_frame *)frame; 369 switch (act_frm->subtype) { 370 case P2P_AF_NOTICE_OF_ABSENCE: 371 brcmf_dbg(TRACE, "%s P2P Notice of Absence Frame\n", 372 (tx) ? "TX" : "RX"); 373 break; 374 case P2P_AF_PRESENCE_REQ: 375 brcmf_dbg(TRACE, "%s P2P Presence Request Frame\n", 376 (tx) ? "TX" : "RX"); 377 break; 378 case P2P_AF_PRESENCE_RSP: 379 brcmf_dbg(TRACE, "%s P2P Presence Response Frame\n", 380 (tx) ? "TX" : "RX"); 381 break; 382 case P2P_AF_GO_DISC_REQ: 383 brcmf_dbg(TRACE, "%s P2P Discoverability Request Frame\n", 384 (tx) ? "TX" : "RX"); 385 break; 386 default: 387 brcmf_dbg(TRACE, "%s Unknown P2P Action Frame\n", 388 (tx) ? "TX" : "RX"); 389 } 390 391 } else if (brcmf_p2p_is_gas_action(frame, frame_len)) { 392 sd_act_frm = (struct brcmf_p2psd_gas_pub_act_frame *)frame; 393 switch (sd_act_frm->action) { 394 case P2PSD_ACTION_ID_GAS_IREQ: 395 brcmf_dbg(TRACE, "%s P2P GAS Initial Request\n", 396 (tx) ? "TX" : "RX"); 397 break; 398 case P2PSD_ACTION_ID_GAS_IRESP: 399 brcmf_dbg(TRACE, "%s P2P GAS Initial Response\n", 400 (tx) ? "TX" : "RX"); 401 break; 402 case P2PSD_ACTION_ID_GAS_CREQ: 403 brcmf_dbg(TRACE, "%s P2P GAS Comback Request\n", 404 (tx) ? "TX" : "RX"); 405 break; 406 case P2PSD_ACTION_ID_GAS_CRESP: 407 brcmf_dbg(TRACE, "%s P2P GAS Comback Response\n", 408 (tx) ? "TX" : "RX"); 409 break; 410 default: 411 brcmf_dbg(TRACE, "%s Unknown P2P GAS Frame\n", 412 (tx) ? "TX" : "RX"); 413 break; 414 } 415 } 416} 417 418#else 419 420static void brcmf_p2p_print_actframe(bool tx, void *frame, u32 frame_len) 421{ 422} 423 424#endif 425 426 427/** 428 * brcmf_p2p_set_firmware() - prepare firmware for peer-to-peer operation. 429 * 430 * @ifp: ifp to use for iovars (primary). 431 * @p2p_mac: mac address to configure for p2p_da_override 432 */ 433static int brcmf_p2p_set_firmware(struct brcmf_if *ifp, u8 *p2p_mac) 434{ 435 s32 ret = 0; 436 437 brcmf_fil_cmd_int_set(ifp, BRCMF_C_DOWN, 1); 438 brcmf_fil_iovar_int_set(ifp, "apsta", 1); 439 brcmf_fil_cmd_int_set(ifp, BRCMF_C_UP, 1); 440 441 /* In case of COB type, firmware has default mac address 442 * After Initializing firmware, we have to set current mac address to 443 * firmware for P2P device address. This must be done with discovery 444 * disabled. 445 */ 446 brcmf_fil_iovar_int_set(ifp, "p2p_disc", 0); 447 448 ret = brcmf_fil_iovar_data_set(ifp, "p2p_da_override", p2p_mac, 449 ETH_ALEN); 450 if (ret) 451 brcmf_err("failed to update device address ret %d\n", ret); 452 453 return ret; 454} 455 456/** 457 * brcmf_p2p_generate_bss_mac() - derive mac addresses for P2P. 458 * 459 * @p2p: P2P specific data. 460 * @dev_addr: optional device address. 461 * 462 * P2P needs mac addresses for P2P device and interface. If no device 463 * address it specified, these are derived from the primary net device, ie. 464 * the permanent ethernet address of the device. 465 */ 466static void brcmf_p2p_generate_bss_mac(struct brcmf_p2p_info *p2p, u8 *dev_addr) 467{ 468 struct brcmf_if *pri_ifp = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->ifp; 469 bool local_admin = false; 470 471 if (!dev_addr || is_zero_ether_addr(dev_addr)) { 472 dev_addr = pri_ifp->mac_addr; 473 local_admin = true; 474 } 475 476 /* Generate the P2P Device Address. This consists of the device's 477 * primary MAC address with the locally administered bit set. 478 */ 479 memcpy(p2p->dev_addr, dev_addr, ETH_ALEN); 480 if (local_admin) 481 p2p->dev_addr[0] |= 0x02; 482 483 /* Generate the P2P Interface Address. If the discovery and connection 484 * BSSCFGs need to simultaneously co-exist, then this address must be 485 * different from the P2P Device Address, but also locally administered. 486 */ 487 memcpy(p2p->int_addr, p2p->dev_addr, ETH_ALEN); 488 p2p->int_addr[0] |= 0x02; 489 p2p->int_addr[4] ^= 0x80; 490} 491 492/** 493 * brcmf_p2p_scan_is_p2p_request() - is cfg80211 scan request a P2P scan. 494 * 495 * @request: the scan request as received from cfg80211. 496 * 497 * returns true if one of the ssids in the request matches the 498 * P2P wildcard ssid; otherwise returns false. 499 */ 500static bool brcmf_p2p_scan_is_p2p_request(struct cfg80211_scan_request *request) 501{ 502 struct cfg80211_ssid *ssids = request->ssids; 503 int i; 504 505 for (i = 0; i < request->n_ssids; i++) { 506 if (ssids[i].ssid_len != BRCMF_P2P_WILDCARD_SSID_LEN) 507 continue; 508 509 brcmf_dbg(INFO, "comparing ssid \"%s\"", ssids[i].ssid); 510 if (!memcmp(BRCMF_P2P_WILDCARD_SSID, ssids[i].ssid, 511 BRCMF_P2P_WILDCARD_SSID_LEN)) 512 return true; 513 } 514 return false; 515} 516 517/** 518 * brcmf_p2p_set_discover_state - set discover state in firmware. 519 * 520 * @ifp: low-level interface object. 521 * @state: discover state to set. 522 * @chanspec: channel parameters (for state @WL_P2P_DISC_ST_LISTEN only). 523 * @listen_ms: duration to listen (for state @WL_P2P_DISC_ST_LISTEN only). 524 */ 525static s32 brcmf_p2p_set_discover_state(struct brcmf_if *ifp, u8 state, 526 u16 chanspec, u16 listen_ms) 527{ 528 struct brcmf_p2p_disc_st_le discover_state; 529 s32 ret = 0; 530 brcmf_dbg(TRACE, "enter\n"); 531 532 discover_state.state = state; 533 discover_state.chspec = cpu_to_le16(chanspec); 534 discover_state.dwell = cpu_to_le16(listen_ms); 535 ret = brcmf_fil_bsscfg_data_set(ifp, "p2p_state", &discover_state, 536 sizeof(discover_state)); 537 return ret; 538} 539 540/** 541 * brcmf_p2p_deinit_discovery() - disable P2P device discovery. 542 * 543 * @p2p: P2P specific data. 544 * 545 * Resets the discovery state and disables it in firmware. 546 */ 547static s32 brcmf_p2p_deinit_discovery(struct brcmf_p2p_info *p2p) 548{ 549 struct brcmf_cfg80211_vif *vif; 550 551 brcmf_dbg(TRACE, "enter\n"); 552 553 /* Set the discovery state to SCAN */ 554 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif; 555 (void)brcmf_p2p_set_discover_state(vif->ifp, WL_P2P_DISC_ST_SCAN, 0, 0); 556 557 /* Disable P2P discovery in the firmware */ 558 vif = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif; 559 (void)brcmf_fil_iovar_int_set(vif->ifp, "p2p_disc", 0); 560 561 return 0; 562} 563 564/** 565 * brcmf_p2p_enable_discovery() - initialize and configure discovery. 566 * 567 * @p2p: P2P specific data. 568 * 569 * Initializes the discovery device and configure the virtual interface. 570 */ 571static int brcmf_p2p_enable_discovery(struct brcmf_p2p_info *p2p) 572{ 573 struct brcmf_cfg80211_vif *vif; 574 s32 ret = 0; 575 576 brcmf_dbg(TRACE, "enter\n"); 577 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif; 578 if (!vif) { 579 brcmf_err("P2P config device not available\n"); 580 ret = -EPERM; 581 goto exit; 582 } 583 584 if (test_bit(BRCMF_P2P_STATUS_ENABLED, &p2p->status)) { 585 brcmf_dbg(INFO, "P2P config device already configured\n"); 586 goto exit; 587 } 588 589 /* Re-initialize P2P Discovery in the firmware */ 590 vif = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif; 591 ret = brcmf_fil_iovar_int_set(vif->ifp, "p2p_disc", 1); 592 if (ret < 0) { 593 brcmf_err("set p2p_disc error\n"); 594 goto exit; 595 } 596 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif; 597 ret = brcmf_p2p_set_discover_state(vif->ifp, WL_P2P_DISC_ST_SCAN, 0, 0); 598 if (ret < 0) { 599 brcmf_err("unable to set WL_P2P_DISC_ST_SCAN\n"); 600 goto exit; 601 } 602 603 /* 604 * Set wsec to any non-zero value in the discovery bsscfg 605 * to ensure our P2P probe responses have the privacy bit 606 * set in the 802.11 WPA IE. Some peer devices may not 607 * initiate WPS with us if this bit is not set. 608 */ 609 ret = brcmf_fil_bsscfg_int_set(vif->ifp, "wsec", AES_ENABLED); 610 if (ret < 0) { 611 brcmf_err("wsec error %d\n", ret); 612 goto exit; 613 } 614 615 set_bit(BRCMF_P2P_STATUS_ENABLED, &p2p->status); 616exit: 617 return ret; 618} 619 620/** 621 * brcmf_p2p_escan() - initiate a P2P scan. 622 * 623 * @p2p: P2P specific data. 624 * @num_chans: number of channels to scan. 625 * @chanspecs: channel parameters for @num_chans channels. 626 * @search_state: P2P discover state to use. 627 * @action: scan action to pass to firmware. 628 * @bss_type: type of P2P bss. 629 */ 630static s32 brcmf_p2p_escan(struct brcmf_p2p_info *p2p, u32 num_chans, 631 u16 chanspecs[], s32 search_state, u16 action, 632 enum p2p_bss_type bss_type) 633{ 634 s32 ret = 0; 635 s32 memsize = offsetof(struct brcmf_p2p_scan_le, 636 eparams.params_le.channel_list); 637 s32 nprobes; 638 s32 active; 639 u32 i; 640 u8 *memblk; 641 struct brcmf_cfg80211_vif *vif; 642 struct brcmf_p2p_scan_le *p2p_params; 643 struct brcmf_scan_params_le *sparams; 644 struct brcmf_ssid ssid; 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 } 657 658 switch (search_state) { 659 case WL_P2P_DISC_ST_SEARCH: 660 /* 661 * If we in SEARCH STATE, we don't need to set SSID explictly 662 * because dongle use P2P WILDCARD internally by default 663 */ 664 /* use null ssid */ 665 ssid.SSID_len = 0; 666 memset(ssid.SSID, 0, sizeof(ssid.SSID)); 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 ssid.SSID_len = BRCMF_P2P_WILDCARD_SSID_LEN; 676 memcpy(ssid.SSID, BRCMF_P2P_WILDCARD_SSID, ssid.SSID_len); 677 break; 678 default: 679 brcmf_err(" invalid search state %d\n", search_state); 680 ret = -EINVAL; 681 goto exit; 682 } 683 684 brcmf_p2p_set_discover_state(vif->ifp, search_state, 0, 0); 685 686 /* 687 * set p2p scan parameters. 688 */ 689 p2p_params = (struct brcmf_p2p_scan_le *)memblk; 690 p2p_params->type = 'E'; 691 692 /* determine the scan engine parameters */ 693 sparams = &p2p_params->eparams.params_le; 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 if (ssid.SSID_len) 702 memcpy(sparams->ssid_le.SSID, ssid.SSID, ssid.SSID_len); 703 sparams->ssid_le.SSID_len = cpu_to_le32(ssid.SSID_len); 704 sparams->home_time = cpu_to_le32(P2PAPI_SCAN_HOME_TIME_MS); 705 706 /* 707 * SOCIAL_CHAN_CNT + 1 takes care of the Progressive scan 708 * supported by the supplicant. 709 */ 710 if (num_chans == SOCIAL_CHAN_CNT || num_chans == (SOCIAL_CHAN_CNT + 1)) 711 active = P2PAPI_SCAN_SOCIAL_DWELL_TIME_MS; 712 else if (num_chans == AF_PEER_SEARCH_CNT) 713 active = P2PAPI_SCAN_AF_SEARCH_DWELL_TIME_MS; 714 else if (brcmf_get_vif_state_any(p2p->cfg, BRCMF_VIF_STATUS_CONNECTED)) 715 active = -1; 716 else 717 active = P2PAPI_SCAN_DWELL_TIME_MS; 718 719 /* Override scan params to find a peer for a connection */ 720 if (num_chans == 1) { 721 active = WL_SCAN_CONNECT_DWELL_TIME_MS; 722 /* WAR to sync with presence period of VSDB GO. 723 * send probe request more frequently 724 */ 725 nprobes = active / WL_SCAN_JOIN_PROBE_INTERVAL_MS; 726 } else { 727 nprobes = active / P2PAPI_SCAN_NPROBS_TIME_MS; 728 } 729 730 if (nprobes <= 0) 731 nprobes = 1; 732 733 brcmf_dbg(INFO, "nprobes # %d, active_time %d\n", nprobes, active); 734 sparams->active_time = cpu_to_le32(active); 735 sparams->nprobes = cpu_to_le32(nprobes); 736 sparams->passive_time = cpu_to_le32(-1); 737 sparams->channel_num = cpu_to_le32(num_chans & 738 BRCMF_SCAN_PARAMS_COUNT_MASK); 739 for (i = 0; i < num_chans; i++) 740 sparams->channel_list[i] = cpu_to_le16(chanspecs[i]); 741 742 /* set the escan specific parameters */ 743 p2p_params->eparams.version = cpu_to_le32(BRCMF_ESCAN_REQ_VERSION); 744 p2p_params->eparams.action = cpu_to_le16(action); 745 p2p_params->eparams.sync_id = cpu_to_le16(0x1234); 746 /* perform p2p scan on primary device */ 747 ret = brcmf_fil_bsscfg_data_set(vif->ifp, "p2p_scan", memblk, memsize); 748 if (!ret) 749 set_bit(BRCMF_SCAN_STATUS_BUSY, &p2p->cfg->scan_status); 750exit: 751 kfree(memblk); 752 return ret; 753} 754 755/** 756 * brcmf_p2p_run_escan() - escan callback for peer-to-peer. 757 * 758 * @cfg: driver private data for cfg80211 interface. 759 * @ndev: net device for which scan is requested. 760 * @request: scan request from cfg80211. 761 * @action: scan action. 762 * 763 * Determines the P2P discovery state based to scan request parameters and 764 * validates the channels in the request. 765 */ 766static s32 brcmf_p2p_run_escan(struct brcmf_cfg80211_info *cfg, 767 struct brcmf_if *ifp, 768 struct cfg80211_scan_request *request, 769 u16 action) 770{ 771 struct brcmf_p2p_info *p2p = &cfg->p2p; 772 s32 err = 0; 773 s32 search_state = WL_P2P_DISC_ST_SCAN; 774 struct brcmf_cfg80211_vif *vif; 775 struct net_device *dev = NULL; 776 int i, num_nodfs = 0; 777 u16 *chanspecs; 778 779 brcmf_dbg(TRACE, "enter\n"); 780 781 if (!request) { 782 err = -EINVAL; 783 goto exit; 784 } 785 786 if (request->n_channels) { 787 chanspecs = kcalloc(request->n_channels, sizeof(*chanspecs), 788 GFP_KERNEL); 789 if (!chanspecs) { 790 err = -ENOMEM; 791 goto exit; 792 } 793 vif = p2p->bss_idx[P2PAPI_BSSCFG_CONNECTION].vif; 794 if (vif) 795 dev = vif->wdev.netdev; 796 if (request->n_channels == 3 && 797 request->channels[0]->hw_value == SOCIAL_CHAN_1 && 798 request->channels[1]->hw_value == SOCIAL_CHAN_2 && 799 request->channels[2]->hw_value == SOCIAL_CHAN_3) { 800 /* SOCIAL CHANNELS 1, 6, 11 */ 801 search_state = WL_P2P_DISC_ST_SEARCH; 802 brcmf_dbg(INFO, "P2P SEARCH PHASE START\n"); 803 } else if (dev != NULL && 804 vif->wdev.iftype == NL80211_IFTYPE_P2P_GO) { 805 /* If you are already a GO, then do SEARCH only */ 806 brcmf_dbg(INFO, "Already a GO. Do SEARCH Only\n"); 807 search_state = WL_P2P_DISC_ST_SEARCH; 808 } else { 809 brcmf_dbg(INFO, "P2P SCAN STATE START\n"); 810 } 811 812 /* 813 * no P2P scanning on passive or DFS channels. 814 */ 815 for (i = 0; i < request->n_channels; i++) { 816 struct ieee80211_channel *chan = request->channels[i]; 817 818 if (chan->flags & (IEEE80211_CHAN_RADAR | 819 IEEE80211_CHAN_NO_IR)) 820 continue; 821 822 chanspecs[i] = channel_to_chanspec(&p2p->cfg->d11inf, 823 chan); 824 brcmf_dbg(INFO, "%d: chan=%d, channel spec=%x\n", 825 num_nodfs, chan->hw_value, chanspecs[i]); 826 num_nodfs++; 827 } 828 err = brcmf_p2p_escan(p2p, num_nodfs, chanspecs, search_state, 829 action, P2PAPI_BSSCFG_DEVICE); 830 kfree(chanspecs); 831 } 832exit: 833 if (err) 834 brcmf_err("error (%d)\n", err); 835 return err; 836} 837 838 839/** 840 * brcmf_p2p_find_listen_channel() - find listen channel in ie string. 841 * 842 * @ie: string of information elements. 843 * @ie_len: length of string. 844 * 845 * Scan ie for p2p ie and look for attribute 6 channel. If available determine 846 * channel and return it. 847 */ 848static s32 brcmf_p2p_find_listen_channel(const u8 *ie, u32 ie_len) 849{ 850 u8 channel_ie[5]; 851 s32 listen_channel; 852 s32 err; 853 854 err = cfg80211_get_p2p_attr(ie, ie_len, 855 IEEE80211_P2P_ATTR_LISTEN_CHANNEL, 856 channel_ie, sizeof(channel_ie)); 857 if (err < 0) 858 return err; 859 860 /* listen channel subel length format: */ 861 /* 3(country) + 1(op. class) + 1(chan num) */ 862 listen_channel = (s32)channel_ie[3 + 1]; 863 864 if (listen_channel == SOCIAL_CHAN_1 || 865 listen_channel == SOCIAL_CHAN_2 || 866 listen_channel == SOCIAL_CHAN_3) { 867 brcmf_dbg(INFO, "Found my Listen Channel %d\n", listen_channel); 868 return listen_channel; 869 } 870 871 return -EPERM; 872} 873 874 875/** 876 * brcmf_p2p_scan_prep() - prepare scan based on request. 877 * 878 * @wiphy: wiphy device. 879 * @request: scan request from cfg80211. 880 * @vif: vif on which scan request is to be executed. 881 * 882 * Prepare the scan appropriately for type of scan requested. Overrides the 883 * escan .run() callback for peer-to-peer scanning. 884 */ 885int brcmf_p2p_scan_prep(struct wiphy *wiphy, 886 struct cfg80211_scan_request *request, 887 struct brcmf_cfg80211_vif *vif) 888{ 889 struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy); 890 struct brcmf_p2p_info *p2p = &cfg->p2p; 891 int err = 0; 892 893 if (brcmf_p2p_scan_is_p2p_request(request)) { 894 /* find my listen channel */ 895 err = brcmf_p2p_find_listen_channel(request->ie, 896 request->ie_len); 897 if (err < 0) 898 return err; 899 900 p2p->afx_hdl.my_listen_chan = err; 901 902 clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status); 903 brcmf_dbg(INFO, "P2P: GO_NEG_PHASE status cleared\n"); 904 905 err = brcmf_p2p_enable_discovery(p2p); 906 if (err) 907 return err; 908 909 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif; 910 911 /* override .run_escan() callback. */ 912 cfg->escan_info.run = brcmf_p2p_run_escan; 913 } 914 err = brcmf_vif_set_mgmt_ie(vif, BRCMF_VNDR_IE_PRBREQ_FLAG, 915 request->ie, request->ie_len); 916 return err; 917} 918 919 920/** 921 * brcmf_p2p_discover_listen() - set firmware to discover listen state. 922 * 923 * @p2p: p2p device. 924 * @channel: channel nr for discover listen. 925 * @duration: time in ms to stay on channel. 926 * 927 */ 928static s32 929brcmf_p2p_discover_listen(struct brcmf_p2p_info *p2p, u16 channel, u32 duration) 930{ 931 struct brcmf_cfg80211_vif *vif; 932 struct brcmu_chan ch; 933 s32 err = 0; 934 935 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif; 936 if (!vif) { 937 brcmf_err("Discovery is not set, so we have nothing to do\n"); 938 err = -EPERM; 939 goto exit; 940 } 941 942 if (test_bit(BRCMF_P2P_STATUS_DISCOVER_LISTEN, &p2p->status)) { 943 brcmf_err("Previous LISTEN is not completed yet\n"); 944 /* WAR: prevent cookie mismatch in wpa_supplicant return OK */ 945 goto exit; 946 } 947 948 ch.chnum = channel; 949 ch.bw = BRCMU_CHAN_BW_20; 950 p2p->cfg->d11inf.encchspec(&ch); 951 err = brcmf_p2p_set_discover_state(vif->ifp, WL_P2P_DISC_ST_LISTEN, 952 ch.chspec, (u16)duration); 953 if (!err) { 954 set_bit(BRCMF_P2P_STATUS_DISCOVER_LISTEN, &p2p->status); 955 p2p->remain_on_channel_cookie++; 956 } 957exit: 958 return err; 959} 960 961 962/** 963 * brcmf_p2p_remain_on_channel() - put device on channel and stay there. 964 * 965 * @wiphy: wiphy device. 966 * @channel: channel to stay on. 967 * @duration: time in ms to remain on channel. 968 * 969 */ 970int brcmf_p2p_remain_on_channel(struct wiphy *wiphy, struct wireless_dev *wdev, 971 struct ieee80211_channel *channel, 972 unsigned int duration, u64 *cookie) 973{ 974 struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy); 975 struct brcmf_p2p_info *p2p = &cfg->p2p; 976 s32 err; 977 u16 channel_nr; 978 979 channel_nr = ieee80211_frequency_to_channel(channel->center_freq); 980 brcmf_dbg(TRACE, "Enter, channel: %d, duration ms (%d)\n", channel_nr, 981 duration); 982 983 err = brcmf_p2p_enable_discovery(p2p); 984 if (err) 985 goto exit; 986 err = brcmf_p2p_discover_listen(p2p, channel_nr, duration); 987 if (err) 988 goto exit; 989 990 memcpy(&p2p->remain_on_channel, channel, sizeof(*channel)); 991 *cookie = p2p->remain_on_channel_cookie; 992 cfg80211_ready_on_channel(wdev, *cookie, channel, duration, GFP_KERNEL); 993 994exit: 995 return err; 996} 997 998 999/** 1000 * brcmf_p2p_notify_listen_complete() - p2p listen has completed. 1001 * 1002 * @ifp: interfac control. 1003 * @e: event message. Not used, to make it usable for fweh event dispatcher. 1004 * @data: payload of message. Not used. 1005 * 1006 */ 1007int brcmf_p2p_notify_listen_complete(struct brcmf_if *ifp, 1008 const struct brcmf_event_msg *e, 1009 void *data) 1010{ 1011 struct brcmf_cfg80211_info *cfg = ifp->drvr->config; 1012 struct brcmf_p2p_info *p2p = &cfg->p2p; 1013 1014 brcmf_dbg(TRACE, "Enter\n"); 1015 if (test_and_clear_bit(BRCMF_P2P_STATUS_DISCOVER_LISTEN, 1016 &p2p->status)) { 1017 if (test_and_clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_AF_LISTEN, 1018 &p2p->status)) { 1019 clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, 1020 &p2p->status); 1021 brcmf_dbg(INFO, "Listen DONE, wake up wait_next_af\n"); 1022 complete(&p2p->wait_next_af); 1023 } 1024 1025 cfg80211_remain_on_channel_expired(&ifp->vif->wdev, 1026 p2p->remain_on_channel_cookie, 1027 &p2p->remain_on_channel, 1028 GFP_KERNEL); 1029 } 1030 return 0; 1031} 1032 1033 1034/** 1035 * brcmf_p2p_cancel_remain_on_channel() - cancel p2p listen state. 1036 * 1037 * @ifp: interfac control. 1038 * 1039 */ 1040void brcmf_p2p_cancel_remain_on_channel(struct brcmf_if *ifp) 1041{ 1042 if (!ifp) 1043 return; 1044 brcmf_p2p_set_discover_state(ifp, WL_P2P_DISC_ST_SCAN, 0, 0); 1045 brcmf_p2p_notify_listen_complete(ifp, NULL, NULL); 1046} 1047 1048 1049/** 1050 * brcmf_p2p_act_frm_search() - search function for action frame. 1051 * 1052 * @p2p: p2p device. 1053 * channel: channel on which action frame is to be trasmitted. 1054 * 1055 * search function to reach at common channel to send action frame. When 1056 * channel is 0 then all social channels will be used to send af 1057 */ 1058static s32 brcmf_p2p_act_frm_search(struct brcmf_p2p_info *p2p, u16 channel) 1059{ 1060 s32 err; 1061 u32 channel_cnt; 1062 u16 *default_chan_list; 1063 u32 i; 1064 struct brcmu_chan ch; 1065 1066 brcmf_dbg(TRACE, "Enter\n"); 1067 1068 if (channel) 1069 channel_cnt = AF_PEER_SEARCH_CNT; 1070 else 1071 channel_cnt = SOCIAL_CHAN_CNT; 1072 default_chan_list = kzalloc(channel_cnt * sizeof(*default_chan_list), 1073 GFP_KERNEL); 1074 if (default_chan_list == NULL) { 1075 brcmf_err("channel list allocation failed\n"); 1076 err = -ENOMEM; 1077 goto exit; 1078 } 1079 ch.bw = BRCMU_CHAN_BW_20; 1080 if (channel) { 1081 ch.chnum = channel; 1082 p2p->cfg->d11inf.encchspec(&ch); 1083 /* insert same channel to the chan_list */ 1084 for (i = 0; i < channel_cnt; i++) 1085 default_chan_list[i] = ch.chspec; 1086 } else { 1087 ch.chnum = SOCIAL_CHAN_1; 1088 p2p->cfg->d11inf.encchspec(&ch); 1089 default_chan_list[0] = ch.chspec; 1090 ch.chnum = SOCIAL_CHAN_2; 1091 p2p->cfg->d11inf.encchspec(&ch); 1092 default_chan_list[1] = ch.chspec; 1093 ch.chnum = SOCIAL_CHAN_3; 1094 p2p->cfg->d11inf.encchspec(&ch); 1095 default_chan_list[2] = ch.chspec; 1096 } 1097 err = brcmf_p2p_escan(p2p, channel_cnt, default_chan_list, 1098 WL_P2P_DISC_ST_SEARCH, WL_ESCAN_ACTION_START, 1099 P2PAPI_BSSCFG_DEVICE); 1100 kfree(default_chan_list); 1101exit: 1102 return err; 1103} 1104 1105 1106/** 1107 * brcmf_p2p_afx_handler() - afx worker thread. 1108 * 1109 * @work: 1110 * 1111 */ 1112static void brcmf_p2p_afx_handler(struct work_struct *work) 1113{ 1114 struct afx_hdl *afx_hdl = container_of(work, struct afx_hdl, afx_work); 1115 struct brcmf_p2p_info *p2p = container_of(afx_hdl, 1116 struct brcmf_p2p_info, 1117 afx_hdl); 1118 s32 err; 1119 1120 if (!afx_hdl->is_active) 1121 return; 1122 1123 if (afx_hdl->is_listen && afx_hdl->my_listen_chan) 1124 /* 100ms ~ 300ms */ 1125 err = brcmf_p2p_discover_listen(p2p, afx_hdl->my_listen_chan, 1126 100 * (1 + prandom_u32() % 3)); 1127 else 1128 err = brcmf_p2p_act_frm_search(p2p, afx_hdl->peer_listen_chan); 1129 1130 if (err) { 1131 brcmf_err("ERROR occurred! value is (%d)\n", err); 1132 if (test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, 1133 &p2p->status)) 1134 complete(&afx_hdl->act_frm_scan); 1135 } 1136} 1137 1138 1139/** 1140 * brcmf_p2p_af_searching_channel() - search channel. 1141 * 1142 * @p2p: p2p device info struct. 1143 * 1144 */ 1145static s32 brcmf_p2p_af_searching_channel(struct brcmf_p2p_info *p2p) 1146{ 1147 struct afx_hdl *afx_hdl = &p2p->afx_hdl; 1148 struct brcmf_cfg80211_vif *pri_vif; 1149 unsigned long duration; 1150 s32 retry; 1151 1152 brcmf_dbg(TRACE, "Enter\n"); 1153 1154 pri_vif = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif; 1155 1156 reinit_completion(&afx_hdl->act_frm_scan); 1157 set_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status); 1158 afx_hdl->is_active = true; 1159 afx_hdl->peer_chan = P2P_INVALID_CHANNEL; 1160 1161 /* Loop to wait until we find a peer's channel or the 1162 * pending action frame tx is cancelled. 1163 */ 1164 retry = 0; 1165 duration = msecs_to_jiffies(P2P_AF_FRM_SCAN_MAX_WAIT); 1166 while ((retry < P2P_CHANNEL_SYNC_RETRY) && 1167 (afx_hdl->peer_chan == P2P_INVALID_CHANNEL)) { 1168 afx_hdl->is_listen = false; 1169 brcmf_dbg(TRACE, "Scheduling action frame for sending.. (%d)\n", 1170 retry); 1171 /* search peer on peer's listen channel */ 1172 schedule_work(&afx_hdl->afx_work); 1173 wait_for_completion_timeout(&afx_hdl->act_frm_scan, duration); 1174 if ((afx_hdl->peer_chan != P2P_INVALID_CHANNEL) || 1175 (!test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, 1176 &p2p->status))) 1177 break; 1178 1179 if (afx_hdl->my_listen_chan) { 1180 brcmf_dbg(TRACE, "Scheduling listen peer, channel=%d\n", 1181 afx_hdl->my_listen_chan); 1182 /* listen on my listen channel */ 1183 afx_hdl->is_listen = true; 1184 schedule_work(&afx_hdl->afx_work); 1185 wait_for_completion_timeout(&afx_hdl->act_frm_scan, 1186 duration); 1187 } 1188 if ((afx_hdl->peer_chan != P2P_INVALID_CHANNEL) || 1189 (!test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, 1190 &p2p->status))) 1191 break; 1192 retry++; 1193 1194 /* if sta is connected or connecting, sleep for a while before 1195 * retry af tx or finding a peer 1196 */ 1197 if (test_bit(BRCMF_VIF_STATUS_CONNECTED, &pri_vif->sme_state) || 1198 test_bit(BRCMF_VIF_STATUS_CONNECTING, &pri_vif->sme_state)) 1199 msleep(P2P_DEFAULT_SLEEP_TIME_VSDB); 1200 } 1201 1202 brcmf_dbg(TRACE, "Completed search/listen peer_chan=%d\n", 1203 afx_hdl->peer_chan); 1204 afx_hdl->is_active = false; 1205 1206 clear_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status); 1207 1208 return afx_hdl->peer_chan; 1209} 1210 1211 1212/** 1213 * brcmf_p2p_scan_finding_common_channel() - was escan used for finding channel 1214 * 1215 * @cfg: common configuration struct. 1216 * @bi: bss info struct, result from scan. 1217 * 1218 */ 1219bool brcmf_p2p_scan_finding_common_channel(struct brcmf_cfg80211_info *cfg, 1220 struct brcmf_bss_info_le *bi) 1221 1222{ 1223 struct brcmf_p2p_info *p2p = &cfg->p2p; 1224 struct afx_hdl *afx_hdl = &p2p->afx_hdl; 1225 struct brcmu_chan ch; 1226 u8 *ie; 1227 s32 err; 1228 u8 p2p_dev_addr[ETH_ALEN]; 1229 1230 if (!test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status)) 1231 return false; 1232 1233 if (bi == NULL) { 1234 brcmf_dbg(TRACE, "ACTION FRAME SCAN Done\n"); 1235 if (afx_hdl->peer_chan == P2P_INVALID_CHANNEL) 1236 complete(&afx_hdl->act_frm_scan); 1237 return true; 1238 } 1239 1240 ie = ((u8 *)bi) + le16_to_cpu(bi->ie_offset); 1241 memset(p2p_dev_addr, 0, sizeof(p2p_dev_addr)); 1242 err = cfg80211_get_p2p_attr(ie, le32_to_cpu(bi->ie_length), 1243 IEEE80211_P2P_ATTR_DEVICE_INFO, 1244 p2p_dev_addr, sizeof(p2p_dev_addr)); 1245 if (err < 0) 1246 err = cfg80211_get_p2p_attr(ie, le32_to_cpu(bi->ie_length), 1247 IEEE80211_P2P_ATTR_DEVICE_ID, 1248 p2p_dev_addr, sizeof(p2p_dev_addr)); 1249 if ((err >= 0) && 1250 (ether_addr_equal(p2p_dev_addr, afx_hdl->tx_dst_addr))) { 1251 if (!bi->ctl_ch) { 1252 ch.chspec = le16_to_cpu(bi->chanspec); 1253 cfg->d11inf.decchspec(&ch); 1254 bi->ctl_ch = ch.chnum; 1255 } 1256 afx_hdl->peer_chan = bi->ctl_ch; 1257 brcmf_dbg(TRACE, "ACTION FRAME SCAN : Peer %pM found, channel : %d\n", 1258 afx_hdl->tx_dst_addr, afx_hdl->peer_chan); 1259 complete(&afx_hdl->act_frm_scan); 1260 } 1261 return true; 1262} 1263 1264/** 1265 * brcmf_p2p_stop_wait_next_action_frame() - finish scan if af tx complete. 1266 * 1267 * @cfg: common configuration struct. 1268 * 1269 */ 1270static void 1271brcmf_p2p_stop_wait_next_action_frame(struct brcmf_cfg80211_info *cfg) 1272{ 1273 struct brcmf_p2p_info *p2p = &cfg->p2p; 1274 struct brcmf_if *ifp = cfg->escan_info.ifp; 1275 1276 if (test_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status) && 1277 (test_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status) || 1278 test_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status))) { 1279 brcmf_dbg(TRACE, "*** Wake UP ** abort actframe iovar\n"); 1280 /* if channel is not zero, "actfame" uses off channel scan. 1281 * So abort scan for off channel completion. 1282 */ 1283 if (p2p->af_sent_channel) 1284 brcmf_notify_escan_complete(cfg, ifp, true, true); 1285 } else if (test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_AF_LISTEN, 1286 &p2p->status)) { 1287 brcmf_dbg(TRACE, "*** Wake UP ** abort listen for next af frame\n"); 1288 /* So abort scan to cancel listen */ 1289 brcmf_notify_escan_complete(cfg, ifp, true, true); 1290 } 1291} 1292 1293 1294/** 1295 * brcmf_p2p_gon_req_collision() - Check if go negotiaton collission 1296 * 1297 * @p2p: p2p device info struct. 1298 * 1299 * return true if recevied action frame is to be dropped. 1300 */ 1301static bool 1302brcmf_p2p_gon_req_collision(struct brcmf_p2p_info *p2p, u8 *mac) 1303{ 1304 struct brcmf_cfg80211_info *cfg = p2p->cfg; 1305 struct brcmf_if *ifp; 1306 1307 brcmf_dbg(TRACE, "Enter\n"); 1308 1309 if (!test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status) || 1310 !p2p->gon_req_action) 1311 return false; 1312 1313 brcmf_dbg(TRACE, "GO Negotiation Request COLLISION !!!\n"); 1314 /* if sa(peer) addr is less than da(my) addr, then this device 1315 * process peer's gon request and block to send gon req. 1316 * if not (sa addr > da addr), 1317 * this device will process gon request and drop gon req of peer. 1318 */ 1319 ifp = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif->ifp; 1320 if (memcmp(mac, ifp->mac_addr, ETH_ALEN) < 0) { 1321 brcmf_dbg(INFO, "Block transmit gon req !!!\n"); 1322 p2p->block_gon_req_tx = true; 1323 /* if we are finding a common channel for sending af, 1324 * do not scan more to block to send current gon req 1325 */ 1326 if (test_and_clear_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, 1327 &p2p->status)) 1328 complete(&p2p->afx_hdl.act_frm_scan); 1329 if (test_and_clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, 1330 &p2p->status)) 1331 brcmf_p2p_stop_wait_next_action_frame(cfg); 1332 return false; 1333 } 1334 1335 /* drop gon request of peer to process gon request by this device. */ 1336 brcmf_dbg(INFO, "Drop received gon req !!!\n"); 1337 1338 return true; 1339} 1340 1341 1342/** 1343 * brcmf_p2p_notify_action_frame_rx() - received action frame. 1344 * 1345 * @ifp: interfac control. 1346 * @e: event message. Not used, to make it usable for fweh event dispatcher. 1347 * @data: payload of message, containing action frame data. 1348 * 1349 */ 1350int brcmf_p2p_notify_action_frame_rx(struct brcmf_if *ifp, 1351 const struct brcmf_event_msg *e, 1352 void *data) 1353{ 1354 struct brcmf_cfg80211_info *cfg = ifp->drvr->config; 1355 struct brcmf_p2p_info *p2p = &cfg->p2p; 1356 struct afx_hdl *afx_hdl = &p2p->afx_hdl; 1357 struct wireless_dev *wdev; 1358 u32 mgmt_frame_len = e->datalen - sizeof(struct brcmf_rx_mgmt_data); 1359 struct brcmf_rx_mgmt_data *rxframe = (struct brcmf_rx_mgmt_data *)data; 1360 u8 *frame = (u8 *)(rxframe + 1); 1361 struct brcmf_p2p_pub_act_frame *act_frm; 1362 struct brcmf_p2psd_gas_pub_act_frame *sd_act_frm; 1363 struct brcmu_chan ch; 1364 struct ieee80211_mgmt *mgmt_frame; 1365 s32 freq; 1366 u16 mgmt_type; 1367 u8 action; 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.chnum; 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 brcmf_err("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.chnum, 1432 ch.band == BRCMU_CHAN_BAND_2G ? 1433 IEEE80211_BAND_2GHZ : 1434 IEEE80211_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 */ 1452int 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 else { 1472 set_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status); 1473 /* If there is no ack, we don't need to wait for 1474 * WLC_E_ACTION_FRAME_OFFCHAN_COMPLETE event 1475 */ 1476 brcmf_p2p_stop_wait_next_action_frame(cfg); 1477 } 1478 1479 } else { 1480 complete(&p2p->send_af_done); 1481 } 1482 return 0; 1483} 1484 1485 1486/** 1487 * brcmf_p2p_tx_action_frame() - send action frame over fil. 1488 * 1489 * @p2p: p2p info struct for vif. 1490 * @af_params: action frame data/info. 1491 * 1492 * Send an action frame immediately without doing channel synchronization. 1493 * 1494 * This function waits for a completion event before returning. 1495 * The WLC_E_ACTION_FRAME_COMPLETE event will be received when the action 1496 * frame is transmitted. 1497 */ 1498static s32 brcmf_p2p_tx_action_frame(struct brcmf_p2p_info *p2p, 1499 struct brcmf_fil_af_params_le *af_params) 1500{ 1501 struct brcmf_cfg80211_vif *vif; 1502 s32 err = 0; 1503 s32 timeout = 0; 1504 1505 brcmf_dbg(TRACE, "Enter\n"); 1506 1507 reinit_completion(&p2p->send_af_done); 1508 clear_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status); 1509 clear_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status); 1510 1511 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif; 1512 err = brcmf_fil_bsscfg_data_set(vif->ifp, "actframe", af_params, 1513 sizeof(*af_params)); 1514 if (err) { 1515 brcmf_err(" sending action frame has failed\n"); 1516 goto exit; 1517 } 1518 1519 p2p->af_sent_channel = le32_to_cpu(af_params->channel); 1520 p2p->af_tx_sent_jiffies = jiffies; 1521 1522 timeout = wait_for_completion_timeout(&p2p->send_af_done, 1523 msecs_to_jiffies(P2P_AF_MAX_WAIT_TIME)); 1524 1525 if (test_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status)) { 1526 brcmf_dbg(TRACE, "TX action frame operation is success\n"); 1527 } else { 1528 err = -EIO; 1529 brcmf_dbg(TRACE, "TX action frame operation has failed\n"); 1530 } 1531 /* clear status bit for action tx */ 1532 clear_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status); 1533 clear_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status); 1534 1535exit: 1536 return err; 1537} 1538 1539 1540/** 1541 * brcmf_p2p_pub_af_tx() - public action frame tx routine. 1542 * 1543 * @cfg: driver private data for cfg80211 interface. 1544 * @af_params: action frame data/info. 1545 * @config_af_params: configuration data for action frame. 1546 * 1547 * routine which transmits ation frame public type. 1548 */ 1549static s32 brcmf_p2p_pub_af_tx(struct brcmf_cfg80211_info *cfg, 1550 struct brcmf_fil_af_params_le *af_params, 1551 struct brcmf_config_af_params *config_af_params) 1552{ 1553 struct brcmf_p2p_info *p2p = &cfg->p2p; 1554 struct brcmf_fil_action_frame_le *action_frame; 1555 struct brcmf_p2p_pub_act_frame *act_frm; 1556 s32 err = 0; 1557 u16 ie_len; 1558 1559 action_frame = &af_params->action_frame; 1560 act_frm = (struct brcmf_p2p_pub_act_frame *)(action_frame->data); 1561 1562 config_af_params->extra_listen = true; 1563 1564 switch (act_frm->subtype) { 1565 case P2P_PAF_GON_REQ: 1566 brcmf_dbg(TRACE, "P2P: GO_NEG_PHASE status set\n"); 1567 set_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status); 1568 config_af_params->mpc_onoff = 0; 1569 config_af_params->search_channel = true; 1570 p2p->next_af_subtype = act_frm->subtype + 1; 1571 p2p->gon_req_action = true; 1572 /* increase dwell time to wait for RESP frame */ 1573 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME); 1574 break; 1575 case P2P_PAF_GON_RSP: 1576 p2p->next_af_subtype = act_frm->subtype + 1; 1577 /* increase dwell time to wait for CONF frame */ 1578 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME); 1579 break; 1580 case P2P_PAF_GON_CONF: 1581 /* If we reached till GO Neg confirmation reset the filter */ 1582 brcmf_dbg(TRACE, "P2P: GO_NEG_PHASE status cleared\n"); 1583 clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status); 1584 /* turn on mpc again if go nego is done */ 1585 config_af_params->mpc_onoff = 1; 1586 /* minimize dwell time */ 1587 af_params->dwell_time = cpu_to_le32(P2P_AF_MIN_DWELL_TIME); 1588 config_af_params->extra_listen = false; 1589 break; 1590 case P2P_PAF_INVITE_REQ: 1591 config_af_params->search_channel = true; 1592 p2p->next_af_subtype = act_frm->subtype + 1; 1593 /* increase dwell time */ 1594 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME); 1595 break; 1596 case P2P_PAF_INVITE_RSP: 1597 /* minimize dwell time */ 1598 af_params->dwell_time = cpu_to_le32(P2P_AF_MIN_DWELL_TIME); 1599 config_af_params->extra_listen = false; 1600 break; 1601 case P2P_PAF_DEVDIS_REQ: 1602 config_af_params->search_channel = true; 1603 p2p->next_af_subtype = act_frm->subtype + 1; 1604 /* maximize dwell time to wait for RESP frame */ 1605 af_params->dwell_time = cpu_to_le32(P2P_AF_LONG_DWELL_TIME); 1606 break; 1607 case P2P_PAF_DEVDIS_RSP: 1608 /* minimize dwell time */ 1609 af_params->dwell_time = cpu_to_le32(P2P_AF_MIN_DWELL_TIME); 1610 config_af_params->extra_listen = false; 1611 break; 1612 case P2P_PAF_PROVDIS_REQ: 1613 ie_len = le16_to_cpu(action_frame->len) - 1614 offsetof(struct brcmf_p2p_pub_act_frame, elts); 1615 if (cfg80211_get_p2p_attr(&act_frm->elts[0], ie_len, 1616 IEEE80211_P2P_ATTR_GROUP_ID, 1617 NULL, 0) < 0) 1618 config_af_params->search_channel = true; 1619 config_af_params->mpc_onoff = 0; 1620 p2p->next_af_subtype = act_frm->subtype + 1; 1621 /* increase dwell time to wait for RESP frame */ 1622 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME); 1623 break; 1624 case P2P_PAF_PROVDIS_RSP: 1625 /* wpa_supplicant send go nego req right after prov disc */ 1626 p2p->next_af_subtype = P2P_PAF_GON_REQ; 1627 /* increase dwell time to MED level */ 1628 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME); 1629 config_af_params->extra_listen = false; 1630 break; 1631 default: 1632 brcmf_err("Unknown p2p pub act frame subtype: %d\n", 1633 act_frm->subtype); 1634 err = -EINVAL; 1635 } 1636 return err; 1637} 1638 1639/** 1640 * brcmf_p2p_send_action_frame() - send action frame . 1641 * 1642 * @cfg: driver private data for cfg80211 interface. 1643 * @ndev: net device to transmit on. 1644 * @af_params: configuration data for action frame. 1645 */ 1646bool brcmf_p2p_send_action_frame(struct brcmf_cfg80211_info *cfg, 1647 struct net_device *ndev, 1648 struct brcmf_fil_af_params_le *af_params) 1649{ 1650 struct brcmf_p2p_info *p2p = &cfg->p2p; 1651 struct brcmf_if *ifp = netdev_priv(ndev); 1652 struct brcmf_fil_action_frame_le *action_frame; 1653 struct brcmf_config_af_params config_af_params; 1654 struct afx_hdl *afx_hdl = &p2p->afx_hdl; 1655 u16 action_frame_len; 1656 bool ack = false; 1657 u8 category; 1658 u8 action; 1659 s32 tx_retry; 1660 s32 extra_listen_time; 1661 uint delta_ms; 1662 1663 action_frame = &af_params->action_frame; 1664 action_frame_len = le16_to_cpu(action_frame->len); 1665 1666 brcmf_p2p_print_actframe(true, action_frame->data, action_frame_len); 1667 1668 /* Add the default dwell time. Dwell time to stay off-channel */ 1669 /* to wait for a response action frame after transmitting an */ 1670 /* GO Negotiation action frame */ 1671 af_params->dwell_time = cpu_to_le32(P2P_AF_DWELL_TIME); 1672 1673 category = action_frame->data[DOT11_ACTION_CAT_OFF]; 1674 action = action_frame->data[DOT11_ACTION_ACT_OFF]; 1675 1676 /* initialize variables */ 1677 p2p->next_af_subtype = P2P_PAF_SUBTYPE_INVALID; 1678 p2p->gon_req_action = false; 1679 1680 /* config parameters */ 1681 config_af_params.mpc_onoff = -1; 1682 config_af_params.search_channel = false; 1683 config_af_params.extra_listen = false; 1684 1685 if (brcmf_p2p_is_pub_action(action_frame->data, action_frame_len)) { 1686 /* p2p public action frame process */ 1687 if (brcmf_p2p_pub_af_tx(cfg, af_params, &config_af_params)) { 1688 /* Just send unknown subtype frame with */ 1689 /* default parameters. */ 1690 brcmf_err("P2P Public action frame, unknown subtype.\n"); 1691 } 1692 } else if (brcmf_p2p_is_gas_action(action_frame->data, 1693 action_frame_len)) { 1694 /* service discovery process */ 1695 if (action == P2PSD_ACTION_ID_GAS_IREQ || 1696 action == P2PSD_ACTION_ID_GAS_CREQ) { 1697 /* configure service discovery query frame */ 1698 config_af_params.search_channel = true; 1699 1700 /* save next af suptype to cancel */ 1701 /* remaining dwell time */ 1702 p2p->next_af_subtype = action + 1; 1703 1704 af_params->dwell_time = 1705 cpu_to_le32(P2P_AF_MED_DWELL_TIME); 1706 } else if (action == P2PSD_ACTION_ID_GAS_IRESP || 1707 action == P2PSD_ACTION_ID_GAS_CRESP) { 1708 /* configure service discovery response frame */ 1709 af_params->dwell_time = 1710 cpu_to_le32(P2P_AF_MIN_DWELL_TIME); 1711 } else { 1712 brcmf_err("Unknown action type: %d\n", action); 1713 goto exit; 1714 } 1715 } else if (brcmf_p2p_is_p2p_action(action_frame->data, 1716 action_frame_len)) { 1717 /* do not configure anything. it will be */ 1718 /* sent with a default configuration */ 1719 } else { 1720 brcmf_err("Unknown Frame: category 0x%x, action 0x%x\n", 1721 category, action); 1722 return false; 1723 } 1724 1725 /* if connecting on primary iface, sleep for a while before sending 1726 * af tx for VSDB 1727 */ 1728 if (test_bit(BRCMF_VIF_STATUS_CONNECTING, 1729 &p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->sme_state)) 1730 msleep(50); 1731 1732 /* if scan is ongoing, abort current scan. */ 1733 if (test_bit(BRCMF_SCAN_STATUS_BUSY, &cfg->scan_status)) 1734 brcmf_abort_scanning(cfg); 1735 1736 memcpy(afx_hdl->tx_dst_addr, action_frame->da, ETH_ALEN); 1737 1738 /* To make sure to send successfully action frame, turn off mpc */ 1739 if (config_af_params.mpc_onoff == 0) 1740 brcmf_set_mpc(ifp, 0); 1741 1742 /* set status and destination address before sending af */ 1743 if (p2p->next_af_subtype != P2P_PAF_SUBTYPE_INVALID) { 1744 /* set status to cancel the remained dwell time in rx process */ 1745 set_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status); 1746 } 1747 1748 p2p->af_sent_channel = 0; 1749 set_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status); 1750 /* validate channel and p2p ies */ 1751 if (config_af_params.search_channel && 1752 IS_P2P_SOCIAL_CHANNEL(le32_to_cpu(af_params->channel)) && 1753 p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif->saved_ie.probe_req_ie_len) { 1754 afx_hdl = &p2p->afx_hdl; 1755 afx_hdl->peer_listen_chan = le32_to_cpu(af_params->channel); 1756 1757 if (brcmf_p2p_af_searching_channel(p2p) == 1758 P2P_INVALID_CHANNEL) { 1759 brcmf_err("Couldn't find peer's channel.\n"); 1760 goto exit; 1761 } 1762 1763 /* Abort scan even for VSDB scenarios. Scan gets aborted in 1764 * firmware but after the check of piggyback algorithm. To take 1765 * care of current piggback algo, lets abort the scan here 1766 * itself. 1767 */ 1768 brcmf_notify_escan_complete(cfg, ifp, true, true); 1769 1770 /* update channel */ 1771 af_params->channel = cpu_to_le32(afx_hdl->peer_chan); 1772 } 1773 1774 tx_retry = 0; 1775 while (!p2p->block_gon_req_tx && 1776 (ack == false) && (tx_retry < P2P_AF_TX_MAX_RETRY)) { 1777 ack = !brcmf_p2p_tx_action_frame(p2p, af_params); 1778 tx_retry++; 1779 } 1780 if (ack == false) { 1781 brcmf_err("Failed to send Action Frame(retry %d)\n", tx_retry); 1782 clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status); 1783 } 1784 1785exit: 1786 clear_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status); 1787 1788 /* WAR: sometimes dongle does not keep the dwell time of 'actframe'. 1789 * if we coundn't get the next action response frame and dongle does 1790 * not keep the dwell time, go to listen state again to get next action 1791 * response frame. 1792 */ 1793 if (ack && config_af_params.extra_listen && !p2p->block_gon_req_tx && 1794 test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status) && 1795 p2p->af_sent_channel == afx_hdl->my_listen_chan) { 1796 delta_ms = jiffies_to_msecs(jiffies - p2p->af_tx_sent_jiffies); 1797 if (le32_to_cpu(af_params->dwell_time) > delta_ms) 1798 extra_listen_time = le32_to_cpu(af_params->dwell_time) - 1799 delta_ms; 1800 else 1801 extra_listen_time = 0; 1802 if (extra_listen_time > 50) { 1803 set_bit(BRCMF_P2P_STATUS_WAITING_NEXT_AF_LISTEN, 1804 &p2p->status); 1805 brcmf_dbg(INFO, "Wait more time! actual af time:%d, calculated extra listen:%d\n", 1806 le32_to_cpu(af_params->dwell_time), 1807 extra_listen_time); 1808 extra_listen_time += 100; 1809 if (!brcmf_p2p_discover_listen(p2p, 1810 p2p->af_sent_channel, 1811 extra_listen_time)) { 1812 unsigned long duration; 1813 1814 extra_listen_time += 100; 1815 duration = msecs_to_jiffies(extra_listen_time); 1816 wait_for_completion_timeout(&p2p->wait_next_af, 1817 duration); 1818 } 1819 clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_AF_LISTEN, 1820 &p2p->status); 1821 } 1822 } 1823 1824 if (p2p->block_gon_req_tx) { 1825 /* if ack is true, supplicant will wait more time(100ms). 1826 * so we will return it as a success to get more time . 1827 */ 1828 p2p->block_gon_req_tx = false; 1829 ack = true; 1830 } 1831 1832 clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status); 1833 /* if all done, turn mpc on again */ 1834 if (config_af_params.mpc_onoff == 1) 1835 brcmf_set_mpc(ifp, 1); 1836 1837 return ack; 1838} 1839 1840/** 1841 * brcmf_p2p_notify_rx_mgmt_p2p_probereq() - Event handler for p2p probe req. 1842 * 1843 * @ifp: interface pointer for which event was received. 1844 * @e: even message. 1845 * @data: payload of event message (probe request). 1846 */ 1847s32 brcmf_p2p_notify_rx_mgmt_p2p_probereq(struct brcmf_if *ifp, 1848 const struct brcmf_event_msg *e, 1849 void *data) 1850{ 1851 struct brcmf_cfg80211_info *cfg = ifp->drvr->config; 1852 struct brcmf_p2p_info *p2p = &cfg->p2p; 1853 struct afx_hdl *afx_hdl = &p2p->afx_hdl; 1854 struct brcmf_cfg80211_vif *vif = ifp->vif; 1855 struct brcmf_rx_mgmt_data *rxframe = (struct brcmf_rx_mgmt_data *)data; 1856 u16 chanspec = be16_to_cpu(rxframe->chanspec); 1857 struct brcmu_chan ch; 1858 u8 *mgmt_frame; 1859 u32 mgmt_frame_len; 1860 s32 freq; 1861 u16 mgmt_type; 1862 1863 brcmf_dbg(INFO, "Enter: event %d reason %d\n", e->event_code, 1864 e->reason); 1865 1866 ch.chspec = be16_to_cpu(rxframe->chanspec); 1867 cfg->d11inf.decchspec(&ch); 1868 1869 if (test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status) && 1870 (ether_addr_equal(afx_hdl->tx_dst_addr, e->addr))) { 1871 afx_hdl->peer_chan = ch.chnum; 1872 brcmf_dbg(INFO, "PROBE REQUEST: Peer found, channel=%d\n", 1873 afx_hdl->peer_chan); 1874 complete(&afx_hdl->act_frm_scan); 1875 } 1876 1877 /* Firmware sends us two proberesponses for each idx one. At the */ 1878 /* moment anything but bsscfgidx 0 is passed up to supplicant */ 1879 if (e->bsscfgidx == 0) 1880 return 0; 1881 1882 /* Filter any P2P probe reqs arriving during the GO-NEG Phase */ 1883 if (test_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status)) { 1884 brcmf_dbg(INFO, "Filtering P2P probe_req in GO-NEG phase\n"); 1885 return 0; 1886 } 1887 1888 /* Check if wpa_supplicant has registered for this frame */ 1889 brcmf_dbg(INFO, "vif->mgmt_rx_reg %04x\n", vif->mgmt_rx_reg); 1890 mgmt_type = (IEEE80211_STYPE_PROBE_REQ & IEEE80211_FCTL_STYPE) >> 4; 1891 if ((vif->mgmt_rx_reg & BIT(mgmt_type)) == 0) 1892 return 0; 1893 1894 mgmt_frame = (u8 *)(rxframe + 1); 1895 mgmt_frame_len = e->datalen - sizeof(*rxframe); 1896 freq = ieee80211_channel_to_frequency(ch.chnum, 1897 ch.band == BRCMU_CHAN_BAND_2G ? 1898 IEEE80211_BAND_2GHZ : 1899 IEEE80211_BAND_5GHZ); 1900 1901 cfg80211_rx_mgmt(&vif->wdev, freq, 0, mgmt_frame, mgmt_frame_len, 0); 1902 1903 brcmf_dbg(INFO, "mgmt_frame_len (%d) , e->datalen (%d), chanspec (%04x), freq (%d)\n", 1904 mgmt_frame_len, e->datalen, chanspec, freq); 1905 1906 return 0; 1907} 1908 1909 1910/** 1911 * brcmf_p2p_attach() - attach for P2P. 1912 * 1913 * @cfg: driver private data for cfg80211 interface. 1914 */ 1915s32 brcmf_p2p_attach(struct brcmf_cfg80211_info *cfg) 1916{ 1917 struct brcmf_if *pri_ifp; 1918 struct brcmf_if *p2p_ifp; 1919 struct brcmf_cfg80211_vif *p2p_vif; 1920 struct brcmf_p2p_info *p2p; 1921 struct brcmf_pub *drvr; 1922 s32 bssidx; 1923 s32 err = 0; 1924 1925 p2p = &cfg->p2p; 1926 p2p->cfg = cfg; 1927 1928 drvr = cfg->pub; 1929 1930 pri_ifp = drvr->iflist[0]; 1931 p2p_ifp = drvr->iflist[1]; 1932 1933 p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif = pri_ifp->vif; 1934 1935 if (p2p_ifp) { 1936 p2p_vif = brcmf_alloc_vif(cfg, NL80211_IFTYPE_P2P_DEVICE, 1937 false); 1938 if (IS_ERR(p2p_vif)) { 1939 brcmf_err("could not create discovery vif\n"); 1940 err = -ENOMEM; 1941 goto exit; 1942 } 1943 1944 p2p_vif->ifp = p2p_ifp; 1945 p2p_ifp->vif = p2p_vif; 1946 p2p_vif->wdev.netdev = p2p_ifp->ndev; 1947 p2p_ifp->ndev->ieee80211_ptr = &p2p_vif->wdev; 1948 SET_NETDEV_DEV(p2p_ifp->ndev, wiphy_dev(cfg->wiphy)); 1949 1950 p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif = p2p_vif; 1951 1952 brcmf_p2p_generate_bss_mac(p2p, NULL); 1953 memcpy(p2p_ifp->mac_addr, p2p->dev_addr, ETH_ALEN); 1954 brcmf_p2p_set_firmware(pri_ifp, p2p->dev_addr); 1955 1956 /* Initialize P2P Discovery in the firmware */ 1957 err = brcmf_fil_iovar_int_set(pri_ifp, "p2p_disc", 1); 1958 if (err < 0) { 1959 brcmf_err("set p2p_disc error\n"); 1960 brcmf_free_vif(p2p_vif); 1961 goto exit; 1962 } 1963 /* obtain bsscfg index for P2P discovery */ 1964 err = brcmf_fil_iovar_int_get(pri_ifp, "p2p_dev", &bssidx); 1965 if (err < 0) { 1966 brcmf_err("retrieving discover bsscfg index failed\n"); 1967 brcmf_free_vif(p2p_vif); 1968 goto exit; 1969 } 1970 /* Verify that firmware uses same bssidx as driver !! */ 1971 if (p2p_ifp->bssidx != bssidx) { 1972 brcmf_err("Incorrect bssidx=%d, compared to p2p_ifp->bssidx=%d\n", 1973 bssidx, p2p_ifp->bssidx); 1974 brcmf_free_vif(p2p_vif); 1975 goto exit; 1976 } 1977 1978 init_completion(&p2p->send_af_done); 1979 INIT_WORK(&p2p->afx_hdl.afx_work, brcmf_p2p_afx_handler); 1980 init_completion(&p2p->afx_hdl.act_frm_scan); 1981 init_completion(&p2p->wait_next_af); 1982 } 1983exit: 1984 return err; 1985} 1986 1987 1988/** 1989 * brcmf_p2p_detach() - detach P2P. 1990 * 1991 * @p2p: P2P specific data. 1992 */ 1993void brcmf_p2p_detach(struct brcmf_p2p_info *p2p) 1994{ 1995 struct brcmf_cfg80211_vif *vif; 1996 1997 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif; 1998 if (vif != NULL) { 1999 brcmf_p2p_cancel_remain_on_channel(vif->ifp); 2000 brcmf_p2p_deinit_discovery(p2p); 2001 /* remove discovery interface */ 2002 brcmf_free_vif(vif); 2003 p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif = NULL; 2004 } 2005 /* just set it all to zero */ 2006 memset(p2p, 0, sizeof(*p2p)); 2007} 2008 2009/** 2010 * brcmf_p2p_get_current_chanspec() - Get current operation channel. 2011 * 2012 * @p2p: P2P specific data. 2013 * @chanspec: chanspec to be returned. 2014 */ 2015static void brcmf_p2p_get_current_chanspec(struct brcmf_p2p_info *p2p, 2016 u16 *chanspec) 2017{ 2018 struct brcmf_if *ifp; 2019 u8 mac_addr[ETH_ALEN]; 2020 struct brcmu_chan ch; 2021 struct brcmf_bss_info_le *bi; 2022 u8 *buf; 2023 2024 ifp = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->ifp; 2025 2026 if (brcmf_fil_cmd_data_get(ifp, BRCMF_C_GET_BSSID, mac_addr, 2027 ETH_ALEN) == 0) { 2028 buf = kzalloc(WL_BSS_INFO_MAX, GFP_KERNEL); 2029 if (buf != NULL) { 2030 *(__le32 *)buf = cpu_to_le32(WL_BSS_INFO_MAX); 2031 if (brcmf_fil_cmd_data_get(ifp, BRCMF_C_GET_BSS_INFO, 2032 buf, WL_BSS_INFO_MAX) == 0) { 2033 bi = (struct brcmf_bss_info_le *)(buf + 4); 2034 *chanspec = le16_to_cpu(bi->chanspec); 2035 kfree(buf); 2036 return; 2037 } 2038 kfree(buf); 2039 } 2040 } 2041 /* Use default channel for P2P */ 2042 ch.chnum = BRCMF_P2P_TEMP_CHAN; 2043 ch.bw = BRCMU_CHAN_BW_20; 2044 p2p->cfg->d11inf.encchspec(&ch); 2045 *chanspec = ch.chspec; 2046} 2047 2048/** 2049 * Change a P2P Role. 2050 * Parameters: 2051 * @mac: MAC address of the BSS to change a role 2052 * Returns 0 if success. 2053 */ 2054int brcmf_p2p_ifchange(struct brcmf_cfg80211_info *cfg, 2055 enum brcmf_fil_p2p_if_types if_type) 2056{ 2057 struct brcmf_p2p_info *p2p = &cfg->p2p; 2058 struct brcmf_cfg80211_vif *vif; 2059 struct brcmf_fil_p2p_if_le if_request; 2060 s32 err; 2061 u16 chanspec; 2062 2063 brcmf_dbg(TRACE, "Enter\n"); 2064 2065 vif = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif; 2066 if (!vif) { 2067 brcmf_err("vif for P2PAPI_BSSCFG_PRIMARY does not exist\n"); 2068 return -EPERM; 2069 } 2070 brcmf_notify_escan_complete(cfg, vif->ifp, true, true); 2071 vif = p2p->bss_idx[P2PAPI_BSSCFG_CONNECTION].vif; 2072 if (!vif) { 2073 brcmf_err("vif for P2PAPI_BSSCFG_CONNECTION does not exist\n"); 2074 return -EPERM; 2075 } 2076 brcmf_set_mpc(vif->ifp, 0); 2077 2078 /* In concurrency case, STA may be already associated in a particular */ 2079 /* channel. so retrieve the current channel of primary interface and */ 2080 /* then start the virtual interface on that. */ 2081 brcmf_p2p_get_current_chanspec(p2p, &chanspec); 2082 2083 if_request.type = cpu_to_le16((u16)if_type); 2084 if_request.chspec = cpu_to_le16(chanspec); 2085 memcpy(if_request.addr, p2p->int_addr, sizeof(if_request.addr)); 2086 2087 brcmf_cfg80211_arm_vif_event(cfg, vif); 2088 err = brcmf_fil_iovar_data_set(vif->ifp, "p2p_ifupd", &if_request, 2089 sizeof(if_request)); 2090 if (err) { 2091 brcmf_err("p2p_ifupd FAILED, err=%d\n", err); 2092 brcmf_cfg80211_arm_vif_event(cfg, NULL); 2093 return err; 2094 } 2095 err = brcmf_cfg80211_wait_vif_event_timeout(cfg, BRCMF_E_IF_CHANGE, 2096 msecs_to_jiffies(1500)); 2097 brcmf_cfg80211_arm_vif_event(cfg, NULL); 2098 if (!err) { 2099 brcmf_err("No BRCMF_E_IF_CHANGE event received\n"); 2100 return -EIO; 2101 } 2102 2103 err = brcmf_fil_cmd_int_set(vif->ifp, BRCMF_C_SET_SCB_TIMEOUT, 2104 BRCMF_SCB_TIMEOUT_VALUE); 2105 2106 return err; 2107} 2108 2109static int brcmf_p2p_request_p2p_if(struct brcmf_p2p_info *p2p, 2110 struct brcmf_if *ifp, u8 ea[ETH_ALEN], 2111 enum brcmf_fil_p2p_if_types iftype) 2112{ 2113 struct brcmf_fil_p2p_if_le if_request; 2114 int err; 2115 u16 chanspec; 2116 2117 /* we need a default channel */ 2118 brcmf_p2p_get_current_chanspec(p2p, &chanspec); 2119 2120 /* fill the firmware request */ 2121 memcpy(if_request.addr, ea, ETH_ALEN); 2122 if_request.type = cpu_to_le16((u16)iftype); 2123 if_request.chspec = cpu_to_le16(chanspec); 2124 2125 err = brcmf_fil_iovar_data_set(ifp, "p2p_ifadd", &if_request, 2126 sizeof(if_request)); 2127 if (err) 2128 return err; 2129 2130 return err; 2131} 2132 2133static int brcmf_p2p_disable_p2p_if(struct brcmf_cfg80211_vif *vif) 2134{ 2135 struct brcmf_cfg80211_info *cfg = wdev_to_cfg(&vif->wdev); 2136 struct net_device *pri_ndev = cfg_to_ndev(cfg); 2137 struct brcmf_if *ifp = netdev_priv(pri_ndev); 2138 u8 *addr = vif->wdev.netdev->dev_addr; 2139 2140 return brcmf_fil_iovar_data_set(ifp, "p2p_ifdis", addr, ETH_ALEN); 2141} 2142 2143static int brcmf_p2p_release_p2p_if(struct brcmf_cfg80211_vif *vif) 2144{ 2145 struct brcmf_cfg80211_info *cfg = wdev_to_cfg(&vif->wdev); 2146 struct net_device *pri_ndev = cfg_to_ndev(cfg); 2147 struct brcmf_if *ifp = netdev_priv(pri_ndev); 2148 u8 *addr = vif->wdev.netdev->dev_addr; 2149 2150 return brcmf_fil_iovar_data_set(ifp, "p2p_ifdel", addr, ETH_ALEN); 2151} 2152 2153/** 2154 * brcmf_p2p_create_p2pdev() - create a P2P_DEVICE virtual interface. 2155 * 2156 * @p2p: P2P specific data. 2157 * @wiphy: wiphy device of new interface. 2158 * @addr: mac address for this new interface. 2159 */ 2160static struct wireless_dev *brcmf_p2p_create_p2pdev(struct brcmf_p2p_info *p2p, 2161 struct wiphy *wiphy, 2162 u8 *addr) 2163{ 2164 struct brcmf_cfg80211_vif *p2p_vif; 2165 struct brcmf_if *p2p_ifp; 2166 struct brcmf_if *pri_ifp; 2167 int err; 2168 u32 bssidx; 2169 2170 if (p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif) 2171 return ERR_PTR(-ENOSPC); 2172 2173 p2p_vif = brcmf_alloc_vif(p2p->cfg, NL80211_IFTYPE_P2P_DEVICE, 2174 false); 2175 if (IS_ERR(p2p_vif)) { 2176 brcmf_err("could not create discovery vif\n"); 2177 return (struct wireless_dev *)p2p_vif; 2178 } 2179 2180 pri_ifp = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->ifp; 2181 brcmf_p2p_generate_bss_mac(p2p, addr); 2182 brcmf_p2p_set_firmware(pri_ifp, p2p->dev_addr); 2183 2184 brcmf_cfg80211_arm_vif_event(p2p->cfg, p2p_vif); 2185 2186 /* Initialize P2P Discovery in the firmware */ 2187 err = brcmf_fil_iovar_int_set(pri_ifp, "p2p_disc", 1); 2188 if (err < 0) { 2189 brcmf_err("set p2p_disc error\n"); 2190 brcmf_cfg80211_arm_vif_event(p2p->cfg, NULL); 2191 goto fail; 2192 } 2193 2194 /* wait for firmware event */ 2195 err = brcmf_cfg80211_wait_vif_event_timeout(p2p->cfg, BRCMF_E_IF_ADD, 2196 msecs_to_jiffies(1500)); 2197 brcmf_cfg80211_arm_vif_event(p2p->cfg, NULL); 2198 if (!err) { 2199 brcmf_err("timeout occurred\n"); 2200 err = -EIO; 2201 goto fail; 2202 } 2203 2204 /* discovery interface created */ 2205 p2p_ifp = p2p_vif->ifp; 2206 p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif = p2p_vif; 2207 memcpy(p2p_ifp->mac_addr, p2p->dev_addr, ETH_ALEN); 2208 memcpy(&p2p_vif->wdev.address, p2p->dev_addr, sizeof(p2p->dev_addr)); 2209 2210 /* verify bsscfg index for P2P discovery */ 2211 err = brcmf_fil_iovar_int_get(pri_ifp, "p2p_dev", &bssidx); 2212 if (err < 0) { 2213 brcmf_err("retrieving discover bsscfg index failed\n"); 2214 goto fail; 2215 } 2216 2217 WARN_ON(p2p_ifp->bssidx != bssidx); 2218 2219 init_completion(&p2p->send_af_done); 2220 INIT_WORK(&p2p->afx_hdl.afx_work, brcmf_p2p_afx_handler); 2221 init_completion(&p2p->afx_hdl.act_frm_scan); 2222 init_completion(&p2p->wait_next_af); 2223 2224 return &p2p_vif->wdev; 2225 2226fail: 2227 brcmf_free_vif(p2p_vif); 2228 return ERR_PTR(err); 2229} 2230 2231/** 2232 * brcmf_p2p_delete_p2pdev() - delete P2P_DEVICE virtual interface. 2233 * 2234 * @vif: virtual interface object to delete. 2235 */ 2236static void brcmf_p2p_delete_p2pdev(struct brcmf_p2p_info *p2p, 2237 struct brcmf_cfg80211_vif *vif) 2238{ 2239 cfg80211_unregister_wdev(&vif->wdev); 2240 p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif = NULL; 2241 brcmf_free_vif(vif); 2242} 2243 2244/** 2245 * brcmf_p2p_add_vif() - create a new P2P virtual interface. 2246 * 2247 * @wiphy: wiphy device of new interface. 2248 * @name: name of the new interface. 2249 * @name_assign_type: origin of the interface name 2250 * @type: nl80211 interface type. 2251 * @flags: not used. 2252 * @params: contains mac address for P2P device. 2253 */ 2254struct wireless_dev *brcmf_p2p_add_vif(struct wiphy *wiphy, const char *name, 2255 unsigned char name_assign_type, 2256 enum nl80211_iftype type, u32 *flags, 2257 struct vif_params *params) 2258{ 2259 struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy); 2260 struct brcmf_if *ifp = netdev_priv(cfg_to_ndev(cfg)); 2261 struct brcmf_cfg80211_vif *vif; 2262 enum brcmf_fil_p2p_if_types iftype; 2263 int err; 2264 2265 if (brcmf_cfg80211_vif_event_armed(cfg)) 2266 return ERR_PTR(-EBUSY); 2267 2268 brcmf_dbg(INFO, "adding vif \"%s\" (type=%d)\n", name, type); 2269 2270 switch (type) { 2271 case NL80211_IFTYPE_P2P_CLIENT: 2272 iftype = BRCMF_FIL_P2P_IF_CLIENT; 2273 break; 2274 case NL80211_IFTYPE_P2P_GO: 2275 iftype = BRCMF_FIL_P2P_IF_GO; 2276 break; 2277 case NL80211_IFTYPE_P2P_DEVICE: 2278 return brcmf_p2p_create_p2pdev(&cfg->p2p, wiphy, 2279 params->macaddr); 2280 default: 2281 return ERR_PTR(-EOPNOTSUPP); 2282 } 2283 2284 vif = brcmf_alloc_vif(cfg, type, false); 2285 if (IS_ERR(vif)) 2286 return (struct wireless_dev *)vif; 2287 brcmf_cfg80211_arm_vif_event(cfg, vif); 2288 2289 err = brcmf_p2p_request_p2p_if(&cfg->p2p, ifp, cfg->p2p.int_addr, 2290 iftype); 2291 if (err) { 2292 brcmf_cfg80211_arm_vif_event(cfg, NULL); 2293 goto fail; 2294 } 2295 2296 /* wait for firmware event */ 2297 err = brcmf_cfg80211_wait_vif_event_timeout(cfg, BRCMF_E_IF_ADD, 2298 msecs_to_jiffies(1500)); 2299 brcmf_cfg80211_arm_vif_event(cfg, NULL); 2300 if (!err) { 2301 brcmf_err("timeout occurred\n"); 2302 err = -EIO; 2303 goto fail; 2304 } 2305 2306 /* interface created in firmware */ 2307 ifp = vif->ifp; 2308 if (!ifp) { 2309 brcmf_err("no if pointer provided\n"); 2310 err = -ENOENT; 2311 goto fail; 2312 } 2313 2314 strncpy(ifp->ndev->name, name, sizeof(ifp->ndev->name) - 1); 2315 ifp->ndev->name_assign_type = name_assign_type; 2316 err = brcmf_net_attach(ifp, true); 2317 if (err) { 2318 brcmf_err("Registering netdevice failed\n"); 2319 goto fail; 2320 } 2321 2322 cfg->p2p.bss_idx[P2PAPI_BSSCFG_CONNECTION].vif = vif; 2323 /* Disable firmware roaming for P2P interface */ 2324 brcmf_fil_iovar_int_set(ifp, "roam_off", 1); 2325 if (iftype == BRCMF_FIL_P2P_IF_GO) { 2326 /* set station timeout for p2p */ 2327 brcmf_fil_cmd_int_set(ifp, BRCMF_C_SET_SCB_TIMEOUT, 2328 BRCMF_SCB_TIMEOUT_VALUE); 2329 } 2330 return &ifp->vif->wdev; 2331 2332fail: 2333 brcmf_free_vif(vif); 2334 return ERR_PTR(err); 2335} 2336 2337/** 2338 * brcmf_p2p_del_vif() - delete a P2P virtual interface. 2339 * 2340 * @wiphy: wiphy device of interface. 2341 * @wdev: wireless device of interface. 2342 */ 2343int brcmf_p2p_del_vif(struct wiphy *wiphy, struct wireless_dev *wdev) 2344{ 2345 struct brcmf_cfg80211_info *cfg = wiphy_priv(wiphy); 2346 struct brcmf_p2p_info *p2p = &cfg->p2p; 2347 struct brcmf_cfg80211_vif *vif; 2348 unsigned long jiffie_timeout = msecs_to_jiffies(1500); 2349 bool wait_for_disable = false; 2350 int err; 2351 2352 brcmf_dbg(TRACE, "delete P2P vif\n"); 2353 vif = container_of(wdev, struct brcmf_cfg80211_vif, wdev); 2354 2355 switch (vif->wdev.iftype) { 2356 case NL80211_IFTYPE_P2P_CLIENT: 2357 if (test_bit(BRCMF_VIF_STATUS_DISCONNECTING, &vif->sme_state)) 2358 wait_for_disable = true; 2359 break; 2360 2361 case NL80211_IFTYPE_P2P_GO: 2362 if (!brcmf_p2p_disable_p2p_if(vif)) 2363 wait_for_disable = true; 2364 break; 2365 2366 case NL80211_IFTYPE_P2P_DEVICE: 2367 brcmf_p2p_delete_p2pdev(p2p, vif); 2368 return 0; 2369 default: 2370 return -ENOTSUPP; 2371 } 2372 2373 clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status); 2374 brcmf_dbg(INFO, "P2P: GO_NEG_PHASE status cleared\n"); 2375 2376 if (wait_for_disable) 2377 wait_for_completion_timeout(&cfg->vif_disabled, 2378 msecs_to_jiffies(500)); 2379 2380 brcmf_vif_clear_mgmt_ies(vif); 2381 2382 brcmf_cfg80211_arm_vif_event(cfg, vif); 2383 err = brcmf_p2p_release_p2p_if(vif); 2384 if (!err) { 2385 /* wait for firmware event */ 2386 err = brcmf_cfg80211_wait_vif_event_timeout(cfg, BRCMF_E_IF_DEL, 2387 jiffie_timeout); 2388 if (!err) 2389 err = -EIO; 2390 else 2391 err = 0; 2392 } 2393 brcmf_cfg80211_arm_vif_event(cfg, NULL); 2394 p2p->bss_idx[P2PAPI_BSSCFG_CONNECTION].vif = NULL; 2395 2396 return err; 2397} 2398 2399int brcmf_p2p_start_device(struct wiphy *wiphy, struct wireless_dev *wdev) 2400{ 2401 struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy); 2402 struct brcmf_p2p_info *p2p = &cfg->p2p; 2403 struct brcmf_cfg80211_vif *vif; 2404 int err; 2405 2406 vif = container_of(wdev, struct brcmf_cfg80211_vif, wdev); 2407 mutex_lock(&cfg->usr_sync); 2408 err = brcmf_p2p_enable_discovery(p2p); 2409 if (!err) 2410 set_bit(BRCMF_VIF_STATUS_READY, &vif->sme_state); 2411 mutex_unlock(&cfg->usr_sync); 2412 return err; 2413} 2414 2415void brcmf_p2p_stop_device(struct wiphy *wiphy, struct wireless_dev *wdev) 2416{ 2417 struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy); 2418 struct brcmf_p2p_info *p2p = &cfg->p2p; 2419 struct brcmf_cfg80211_vif *vif; 2420 2421 vif = container_of(wdev, struct brcmf_cfg80211_vif, wdev); 2422 mutex_lock(&cfg->usr_sync); 2423 (void)brcmf_p2p_deinit_discovery(p2p); 2424 brcmf_abort_scanning(cfg); 2425 clear_bit(BRCMF_VIF_STATUS_READY, &vif->sme_state); 2426 mutex_unlock(&cfg->usr_sync); 2427} 2428