1 // SPDX-License-Identifier: ISC 2 /* 3 * Copyright (c) 2012 Broadcom Corporation 4 */ 5 #include <linux/slab.h> 6 #include <linux/netdevice.h> 7 #include <linux/etherdevice.h> 8 #include <linux/rtnetlink.h> 9 #include <net/cfg80211.h> 10 11 #include <brcmu_wifi.h> 12 #include <brcmu_utils.h> 13 #include <defs.h> 14 #include "core.h" 15 #include "debug.h" 16 #include "fwil.h" 17 #include "fwil_types.h" 18 #include "p2p.h" 19 #include "cfg80211.h" 20 #include "feature.h" 21 22 /* parameters used for p2p escan */ 23 #define P2PAPI_SCAN_NPROBES 1 24 #define P2PAPI_SCAN_DWELL_TIME_MS 80 25 #define P2PAPI_SCAN_SOCIAL_DWELL_TIME_MS 40 26 #define P2PAPI_SCAN_HOME_TIME_MS 60 27 #define P2PAPI_SCAN_NPROBS_TIME_MS 30 28 #define P2PAPI_SCAN_AF_SEARCH_DWELL_TIME_MS 100 29 #define WL_SCAN_CONNECT_DWELL_TIME_MS 200 30 #define WL_SCAN_JOIN_PROBE_INTERVAL_MS 20 31 32 #define BRCMF_P2P_WILDCARD_SSID "DIRECT-" 33 #define BRCMF_P2P_WILDCARD_SSID_LEN (sizeof(BRCMF_P2P_WILDCARD_SSID) - 1) 34 35 #define SOCIAL_CHAN_1 1 36 #define SOCIAL_CHAN_2 6 37 #define SOCIAL_CHAN_3 11 38 #define IS_P2P_SOCIAL_CHANNEL(channel) ((channel == SOCIAL_CHAN_1) || \ 39 (channel == SOCIAL_CHAN_2) || \ 40 (channel == SOCIAL_CHAN_3)) 41 #define BRCMF_P2P_TEMP_CHAN SOCIAL_CHAN_3 42 #define SOCIAL_CHAN_CNT 3 43 #define AF_PEER_SEARCH_CNT 2 44 45 #define BRCMF_SCB_TIMEOUT_VALUE 20 46 47 #define P2P_VER 9 /* P2P version: 9=WiFi P2P v1.0 */ 48 #define P2P_PUB_AF_CATEGORY 0x04 49 #define P2P_PUB_AF_ACTION 0x09 50 #define P2P_AF_CATEGORY 0x7f 51 #define P2P_OUI "\x50\x6F\x9A" /* P2P OUI */ 52 #define P2P_OUI_LEN 3 /* P2P OUI length */ 53 54 /* Action Frame Constants */ 55 #define DOT11_ACTION_HDR_LEN 2 /* action frame category + action */ 56 #define DOT11_ACTION_CAT_OFF 0 /* category offset */ 57 #define DOT11_ACTION_ACT_OFF 1 /* action offset */ 58 59 #define P2P_AF_DWELL_TIME 200 60 #define P2P_AF_MIN_DWELL_TIME 100 61 #define P2P_AF_MED_DWELL_TIME 400 62 #define P2P_AF_LONG_DWELL_TIME 1000 63 #define P2P_AF_TX_MAX_RETRY 5 64 #define P2P_AF_MAX_WAIT_TIME msecs_to_jiffies(2000) 65 #define P2P_INVALID_CHANNEL -1 66 #define P2P_CHANNEL_SYNC_RETRY 5 67 #define P2P_AF_FRM_SCAN_MAX_WAIT msecs_to_jiffies(450) 68 #define P2P_DEFAULT_SLEEP_TIME_VSDB 200 69 #define P2P_AF_RETRY_DELAY_TIME 40 70 71 /* WiFi P2P Public Action Frame OUI Subtypes */ 72 #define P2P_PAF_GON_REQ 0 /* Group Owner Negotiation Req */ 73 #define P2P_PAF_GON_RSP 1 /* Group Owner Negotiation Rsp */ 74 #define P2P_PAF_GON_CONF 2 /* Group Owner Negotiation Confirm */ 75 #define P2P_PAF_INVITE_REQ 3 /* P2P Invitation Request */ 76 #define P2P_PAF_INVITE_RSP 4 /* P2P Invitation Response */ 77 #define P2P_PAF_DEVDIS_REQ 5 /* Device Discoverability Request */ 78 #define P2P_PAF_DEVDIS_RSP 6 /* Device Discoverability Response */ 79 #define P2P_PAF_PROVDIS_REQ 7 /* Provision Discovery Request */ 80 #define P2P_PAF_PROVDIS_RSP 8 /* Provision Discovery Response */ 81 #define P2P_PAF_SUBTYPE_INVALID 255 /* Invalid Subtype */ 82 83 /* WiFi P2P Action Frame OUI Subtypes */ 84 #define P2P_AF_NOTICE_OF_ABSENCE 0 /* Notice of Absence */ 85 #define P2P_AF_PRESENCE_REQ 1 /* P2P Presence Request */ 86 #define P2P_AF_PRESENCE_RSP 2 /* P2P Presence Response */ 87 #define P2P_AF_GO_DISC_REQ 3 /* GO Discoverability Request */ 88 89 /* P2P Service Discovery related */ 90 #define P2PSD_ACTION_CATEGORY 0x04 /* Public action frame */ 91 #define P2PSD_ACTION_ID_GAS_IREQ 0x0a /* GAS Initial Request AF */ 92 #define P2PSD_ACTION_ID_GAS_IRESP 0x0b /* GAS Initial Response AF */ 93 #define P2PSD_ACTION_ID_GAS_CREQ 0x0c /* GAS Comeback Request AF */ 94 #define P2PSD_ACTION_ID_GAS_CRESP 0x0d /* GAS Comeback Response AF */ 95 96 #define BRCMF_P2P_DISABLE_TIMEOUT msecs_to_jiffies(500) 97 98 /* Mask for retry counter of custom dwell time */ 99 #define CUSTOM_RETRY_MASK 0xff000000 100 /** 101 * struct brcmf_p2p_disc_st_le - set discovery state in firmware. 102 * 103 * @state: requested discovery state (see enum brcmf_p2p_disc_state). 104 * @chspec: channel parameter for %WL_P2P_DISC_ST_LISTEN state. 105 * @dwell: dwell time in ms for %WL_P2P_DISC_ST_LISTEN state. 106 */ 107 struct brcmf_p2p_disc_st_le { 108 u8 state; 109 __le16 chspec; 110 __le16 dwell; 111 }; 112 113 /** 114 * enum brcmf_p2p_disc_state - P2P discovery state values 115 * 116 * @WL_P2P_DISC_ST_SCAN: P2P discovery with wildcard SSID and P2P IE. 117 * @WL_P2P_DISC_ST_LISTEN: P2P discovery off-channel for specified time. 118 * @WL_P2P_DISC_ST_SEARCH: P2P discovery with P2P wildcard SSID and P2P IE. 119 */ 120 enum brcmf_p2p_disc_state { 121 WL_P2P_DISC_ST_SCAN, 122 WL_P2P_DISC_ST_LISTEN, 123 WL_P2P_DISC_ST_SEARCH 124 }; 125 126 /** 127 * struct brcmf_p2p_scan_le - P2P specific scan request. 128 * 129 * @type: type of scan method requested (values: 'E' or 'S'). 130 * @reserved: reserved (ignored). 131 * @eparams: parameters used for type 'E'. 132 * @sparams: parameters used for type 'S'. 133 */ 134 struct brcmf_p2p_scan_le { 135 u8 type; 136 u8 reserved[3]; 137 union { 138 struct brcmf_escan_params_le eparams; 139 struct brcmf_scan_params_le sparams; 140 }; 141 }; 142 143 /** 144 * struct brcmf_p2p_pub_act_frame - WiFi P2P Public Action Frame 145 * 146 * @category: P2P_PUB_AF_CATEGORY 147 * @action: P2P_PUB_AF_ACTION 148 * @oui: P2P_OUI 149 * @oui_type: OUI type - P2P_VER 150 * @subtype: OUI subtype - P2P_TYPE_* 151 * @dialog_token: nonzero, identifies req/rsp transaction 152 * @elts: Variable length information elements. 153 */ 154 struct brcmf_p2p_pub_act_frame { 155 u8 category; 156 u8 action; 157 u8 oui[3]; 158 u8 oui_type; 159 u8 subtype; 160 u8 dialog_token; 161 u8 elts[]; 162 }; 163 164 /** 165 * struct brcmf_p2p_action_frame - WiFi P2P Action Frame 166 * 167 * @category: P2P_AF_CATEGORY 168 * @oui: OUI - P2P_OUI 169 * @type: OUI Type - P2P_VER 170 * @subtype: OUI Subtype - P2P_AF_* 171 * @dialog_token: nonzero, identifies req/resp tranaction 172 * @elts: Variable length information elements. 173 */ 174 struct brcmf_p2p_action_frame { 175 u8 category; 176 u8 oui[3]; 177 u8 type; 178 u8 subtype; 179 u8 dialog_token; 180 u8 elts[]; 181 }; 182 183 /** 184 * struct brcmf_p2psd_gas_pub_act_frame - Wi-Fi GAS Public Action Frame 185 * 186 * @category: 0x04 Public Action Frame 187 * @action: 0x6c Advertisement Protocol 188 * @dialog_token: nonzero, identifies req/rsp transaction 189 * @query_data: Query Data. SD gas ireq SD gas iresp 190 */ 191 struct brcmf_p2psd_gas_pub_act_frame { 192 u8 category; 193 u8 action; 194 u8 dialog_token; 195 u8 query_data[]; 196 }; 197 198 /** 199 * struct brcmf_config_af_params - Action Frame Parameters for tx. 200 * 201 * @mpc_onoff: To make sure to send successfully action frame, we have to 202 * turn off mpc 0: off, 1: on, (-1): do nothing 203 * @search_channel: 1: search peer's channel to send af 204 * @extra_listen: keep the dwell time to get af response frame. 205 */ 206 struct brcmf_config_af_params { 207 s32 mpc_onoff; 208 bool search_channel; 209 bool extra_listen; 210 }; 211 212 /** 213 * brcmf_p2p_is_pub_action() - true if p2p public type frame. 214 * 215 * @frame: action frame data. 216 * @frame_len: length of action frame data. 217 * 218 * Determine if action frame is p2p public action type 219 */ 220 static bool brcmf_p2p_is_pub_action(void *frame, u32 frame_len) 221 { 222 struct brcmf_p2p_pub_act_frame *pact_frm; 223 224 if (frame == NULL) 225 return false; 226 227 pact_frm = (struct brcmf_p2p_pub_act_frame *)frame; 228 if (frame_len < sizeof(*pact_frm)) 229 return false; 230 231 if (pact_frm->category == P2P_PUB_AF_CATEGORY && 232 pact_frm->action == P2P_PUB_AF_ACTION && 233 pact_frm->oui_type == P2P_VER && 234 memcmp(pact_frm->oui, P2P_OUI, P2P_OUI_LEN) == 0) 235 return true; 236 237 return false; 238 } 239 240 /** 241 * brcmf_p2p_is_p2p_action() - true if p2p action type frame. 242 * 243 * @frame: action frame data. 244 * @frame_len: length of action frame data. 245 * 246 * Determine if action frame is p2p action type 247 */ 248 static bool brcmf_p2p_is_p2p_action(void *frame, u32 frame_len) 249 { 250 struct brcmf_p2p_action_frame *act_frm; 251 252 if (frame == NULL) 253 return false; 254 255 act_frm = (struct brcmf_p2p_action_frame *)frame; 256 if (frame_len < sizeof(*act_frm)) 257 return false; 258 259 if (act_frm->category == P2P_AF_CATEGORY && 260 act_frm->type == P2P_VER && 261 memcmp(act_frm->oui, P2P_OUI, P2P_OUI_LEN) == 0) 262 return true; 263 264 return false; 265 } 266 267 /** 268 * brcmf_p2p_is_gas_action() - true if p2p gas action type frame. 269 * 270 * @frame: action frame data. 271 * @frame_len: length of action frame data. 272 * 273 * Determine if action frame is p2p gas action type 274 */ 275 static bool brcmf_p2p_is_gas_action(void *frame, u32 frame_len) 276 { 277 struct brcmf_p2psd_gas_pub_act_frame *sd_act_frm; 278 279 if (frame == NULL) 280 return false; 281 282 sd_act_frm = (struct brcmf_p2psd_gas_pub_act_frame *)frame; 283 if (frame_len < sizeof(*sd_act_frm)) 284 return false; 285 286 if (sd_act_frm->category != P2PSD_ACTION_CATEGORY) 287 return false; 288 289 if (sd_act_frm->action == P2PSD_ACTION_ID_GAS_IREQ || 290 sd_act_frm->action == P2PSD_ACTION_ID_GAS_IRESP || 291 sd_act_frm->action == P2PSD_ACTION_ID_GAS_CREQ || 292 sd_act_frm->action == P2PSD_ACTION_ID_GAS_CRESP) 293 return true; 294 295 return false; 296 } 297 298 /** 299 * brcmf_p2p_print_actframe() - debug print routine. 300 * 301 * @tx: Received or to be transmitted 302 * @frame: action frame data. 303 * @frame_len: length of action frame data. 304 * 305 * Print information about the p2p action frame 306 */ 307 308 #ifdef DEBUG 309 310 static void brcmf_p2p_print_actframe(bool tx, void *frame, u32 frame_len) 311 { 312 struct brcmf_p2p_pub_act_frame *pact_frm; 313 struct brcmf_p2p_action_frame *act_frm; 314 struct brcmf_p2psd_gas_pub_act_frame *sd_act_frm; 315 316 if (!frame || frame_len <= 2) 317 return; 318 319 if (brcmf_p2p_is_pub_action(frame, frame_len)) { 320 pact_frm = (struct brcmf_p2p_pub_act_frame *)frame; 321 switch (pact_frm->subtype) { 322 case P2P_PAF_GON_REQ: 323 brcmf_dbg(TRACE, "%s P2P Group Owner Negotiation Req Frame\n", 324 (tx) ? "TX" : "RX"); 325 break; 326 case P2P_PAF_GON_RSP: 327 brcmf_dbg(TRACE, "%s P2P Group Owner Negotiation Rsp Frame\n", 328 (tx) ? "TX" : "RX"); 329 break; 330 case P2P_PAF_GON_CONF: 331 brcmf_dbg(TRACE, "%s P2P Group Owner Negotiation Confirm Frame\n", 332 (tx) ? "TX" : "RX"); 333 break; 334 case P2P_PAF_INVITE_REQ: 335 brcmf_dbg(TRACE, "%s P2P Invitation Request Frame\n", 336 (tx) ? "TX" : "RX"); 337 break; 338 case P2P_PAF_INVITE_RSP: 339 brcmf_dbg(TRACE, "%s P2P Invitation Response Frame\n", 340 (tx) ? "TX" : "RX"); 341 break; 342 case P2P_PAF_DEVDIS_REQ: 343 brcmf_dbg(TRACE, "%s P2P Device Discoverability Request Frame\n", 344 (tx) ? "TX" : "RX"); 345 break; 346 case P2P_PAF_DEVDIS_RSP: 347 brcmf_dbg(TRACE, "%s P2P Device Discoverability Response Frame\n", 348 (tx) ? "TX" : "RX"); 349 break; 350 case P2P_PAF_PROVDIS_REQ: 351 brcmf_dbg(TRACE, "%s P2P Provision Discovery Request Frame\n", 352 (tx) ? "TX" : "RX"); 353 break; 354 case P2P_PAF_PROVDIS_RSP: 355 brcmf_dbg(TRACE, "%s P2P Provision Discovery Response Frame\n", 356 (tx) ? "TX" : "RX"); 357 break; 358 default: 359 brcmf_dbg(TRACE, "%s Unknown P2P Public Action Frame\n", 360 (tx) ? "TX" : "RX"); 361 break; 362 } 363 } else if (brcmf_p2p_is_p2p_action(frame, frame_len)) { 364 act_frm = (struct brcmf_p2p_action_frame *)frame; 365 switch (act_frm->subtype) { 366 case P2P_AF_NOTICE_OF_ABSENCE: 367 brcmf_dbg(TRACE, "%s P2P Notice of Absence Frame\n", 368 (tx) ? "TX" : "RX"); 369 break; 370 case P2P_AF_PRESENCE_REQ: 371 brcmf_dbg(TRACE, "%s P2P Presence Request Frame\n", 372 (tx) ? "TX" : "RX"); 373 break; 374 case P2P_AF_PRESENCE_RSP: 375 brcmf_dbg(TRACE, "%s P2P Presence Response Frame\n", 376 (tx) ? "TX" : "RX"); 377 break; 378 case P2P_AF_GO_DISC_REQ: 379 brcmf_dbg(TRACE, "%s P2P Discoverability Request Frame\n", 380 (tx) ? "TX" : "RX"); 381 break; 382 default: 383 brcmf_dbg(TRACE, "%s Unknown P2P Action Frame\n", 384 (tx) ? "TX" : "RX"); 385 } 386 387 } else if (brcmf_p2p_is_gas_action(frame, frame_len)) { 388 sd_act_frm = (struct brcmf_p2psd_gas_pub_act_frame *)frame; 389 switch (sd_act_frm->action) { 390 case P2PSD_ACTION_ID_GAS_IREQ: 391 brcmf_dbg(TRACE, "%s P2P GAS Initial Request\n", 392 (tx) ? "TX" : "RX"); 393 break; 394 case P2PSD_ACTION_ID_GAS_IRESP: 395 brcmf_dbg(TRACE, "%s P2P GAS Initial Response\n", 396 (tx) ? "TX" : "RX"); 397 break; 398 case P2PSD_ACTION_ID_GAS_CREQ: 399 brcmf_dbg(TRACE, "%s P2P GAS Comeback Request\n", 400 (tx) ? "TX" : "RX"); 401 break; 402 case P2PSD_ACTION_ID_GAS_CRESP: 403 brcmf_dbg(TRACE, "%s P2P GAS Comeback Response\n", 404 (tx) ? "TX" : "RX"); 405 break; 406 default: 407 brcmf_dbg(TRACE, "%s Unknown P2P GAS Frame\n", 408 (tx) ? "TX" : "RX"); 409 break; 410 } 411 } 412 } 413 414 #else 415 416 static void brcmf_p2p_print_actframe(bool tx, void *frame, u32 frame_len) 417 { 418 } 419 420 #endif 421 422 423 /** 424 * brcmf_p2p_set_firmware() - prepare firmware for peer-to-peer operation. 425 * 426 * @ifp: ifp to use for iovars (primary). 427 * @p2p_mac: mac address to configure for p2p_da_override 428 */ 429 static int brcmf_p2p_set_firmware(struct brcmf_if *ifp, u8 *p2p_mac) 430 { 431 struct brcmf_pub *drvr = ifp->drvr; 432 s32 ret = 0; 433 434 brcmf_fil_cmd_int_set(ifp, BRCMF_C_DOWN, 1); 435 brcmf_fil_iovar_int_set(ifp, "apsta", 1); 436 brcmf_fil_cmd_int_set(ifp, BRCMF_C_UP, 1); 437 438 /* In case of COB type, firmware has default mac address 439 * After Initializing firmware, we have to set current mac address to 440 * firmware for P2P device address. This must be done with discovery 441 * disabled. 442 */ 443 brcmf_fil_iovar_int_set(ifp, "p2p_disc", 0); 444 445 ret = brcmf_fil_iovar_data_set(ifp, "p2p_da_override", p2p_mac, 446 ETH_ALEN); 447 if (ret) 448 bphy_err(drvr, "failed to update device address ret %d\n", ret); 449 450 return ret; 451 } 452 453 /** 454 * brcmf_p2p_generate_bss_mac() - derive mac addresses for P2P. 455 * 456 * @p2p: P2P specific data. 457 * @dev_addr: optional device address. 458 * 459 * P2P needs mac addresses for P2P device and interface. If no device 460 * address it specified, these are derived from a random ethernet 461 * address. 462 */ 463 static void brcmf_p2p_generate_bss_mac(struct brcmf_p2p_info *p2p, u8 *dev_addr) 464 { 465 struct brcmf_if *pri_ifp = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->ifp; 466 bool random_addr = false; 467 bool local_admin = false; 468 469 if (!dev_addr || is_zero_ether_addr(dev_addr)) { 470 /* If the primary interface address is already locally 471 * administered, create a new random address. 472 */ 473 if (pri_ifp->mac_addr[0] & 0x02) { 474 random_addr = true; 475 } else { 476 dev_addr = pri_ifp->mac_addr; 477 local_admin = true; 478 } 479 } 480 481 /* Generate the P2P Device Address obtaining a random ethernet 482 * address with the locally administered bit set. 483 */ 484 if (random_addr) 485 eth_random_addr(p2p->dev_addr); 486 else 487 memcpy(p2p->dev_addr, dev_addr, ETH_ALEN); 488 489 if (local_admin) 490 p2p->dev_addr[0] |= 0x02; 491 492 /* Generate the P2P Interface Address. If the discovery and connection 493 * BSSCFGs need to simultaneously co-exist, then this address must be 494 * different from the P2P Device Address, but also locally administered. 495 */ 496 memcpy(p2p->conn_int_addr, p2p->dev_addr, ETH_ALEN); 497 p2p->conn_int_addr[0] |= 0x02; 498 p2p->conn_int_addr[4] ^= 0x80; 499 500 memcpy(p2p->conn2_int_addr, p2p->dev_addr, ETH_ALEN); 501 p2p->conn2_int_addr[0] |= 0x02; 502 p2p->conn2_int_addr[4] ^= 0x90; 503 } 504 505 /** 506 * brcmf_p2p_scan_is_p2p_request() - is cfg80211 scan request a P2P scan. 507 * 508 * @request: the scan request as received from cfg80211. 509 * 510 * returns true if one of the ssids in the request matches the 511 * P2P wildcard ssid; otherwise returns false. 512 */ 513 static bool brcmf_p2p_scan_is_p2p_request(struct cfg80211_scan_request *request) 514 { 515 struct cfg80211_ssid *ssids = request->ssids; 516 int i; 517 518 for (i = 0; i < request->n_ssids; i++) { 519 if (ssids[i].ssid_len != BRCMF_P2P_WILDCARD_SSID_LEN) 520 continue; 521 522 brcmf_dbg(INFO, "comparing ssid \"%s\"", ssids[i].ssid); 523 if (!memcmp(BRCMF_P2P_WILDCARD_SSID, ssids[i].ssid, 524 BRCMF_P2P_WILDCARD_SSID_LEN)) 525 return true; 526 } 527 return false; 528 } 529 530 /** 531 * brcmf_p2p_set_discover_state - set discover state in firmware. 532 * 533 * @ifp: low-level interface object. 534 * @state: discover state to set. 535 * @chanspec: channel parameters (for state @WL_P2P_DISC_ST_LISTEN only). 536 * @listen_ms: duration to listen (for state @WL_P2P_DISC_ST_LISTEN only). 537 */ 538 static s32 brcmf_p2p_set_discover_state(struct brcmf_if *ifp, u8 state, 539 u16 chanspec, u16 listen_ms) 540 { 541 struct brcmf_p2p_disc_st_le discover_state; 542 s32 ret = 0; 543 brcmf_dbg(TRACE, "enter\n"); 544 545 discover_state.state = state; 546 discover_state.chspec = cpu_to_le16(chanspec); 547 discover_state.dwell = cpu_to_le16(listen_ms); 548 ret = brcmf_fil_bsscfg_data_set(ifp, "p2p_state", &discover_state, 549 sizeof(discover_state)); 550 return ret; 551 } 552 553 /** 554 * brcmf_p2p_deinit_discovery() - disable P2P device discovery. 555 * 556 * @p2p: P2P specific data. 557 * 558 * Resets the discovery state and disables it in firmware. 559 */ 560 static s32 brcmf_p2p_deinit_discovery(struct brcmf_p2p_info *p2p) 561 { 562 struct brcmf_cfg80211_vif *vif; 563 564 brcmf_dbg(TRACE, "enter\n"); 565 566 /* Set the discovery state to SCAN */ 567 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif; 568 (void)brcmf_p2p_set_discover_state(vif->ifp, WL_P2P_DISC_ST_SCAN, 0, 0); 569 570 /* Disable P2P discovery in the firmware */ 571 vif = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif; 572 (void)brcmf_fil_iovar_int_set(vif->ifp, "p2p_disc", 0); 573 574 return 0; 575 } 576 577 /** 578 * brcmf_p2p_enable_discovery() - initialize and configure discovery. 579 * 580 * @p2p: P2P specific data. 581 * 582 * Initializes the discovery device and configure the virtual interface. 583 */ 584 static int brcmf_p2p_enable_discovery(struct brcmf_p2p_info *p2p) 585 { 586 struct brcmf_pub *drvr = p2p->cfg->pub; 587 struct brcmf_cfg80211_vif *vif; 588 s32 ret = 0; 589 590 brcmf_dbg(TRACE, "enter\n"); 591 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif; 592 if (!vif) { 593 bphy_err(drvr, "P2P config device not available\n"); 594 ret = -EPERM; 595 goto exit; 596 } 597 598 if (test_bit(BRCMF_P2P_STATUS_ENABLED, &p2p->status)) { 599 brcmf_dbg(INFO, "P2P config device already configured\n"); 600 goto exit; 601 } 602 603 /* Re-initialize P2P Discovery in the firmware */ 604 vif = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif; 605 ret = brcmf_fil_iovar_int_set(vif->ifp, "p2p_disc", 1); 606 if (ret < 0) { 607 bphy_err(drvr, "set p2p_disc error\n"); 608 goto exit; 609 } 610 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif; 611 ret = brcmf_p2p_set_discover_state(vif->ifp, WL_P2P_DISC_ST_SCAN, 0, 0); 612 if (ret < 0) { 613 bphy_err(drvr, "unable to set WL_P2P_DISC_ST_SCAN\n"); 614 goto exit; 615 } 616 617 /* 618 * Set wsec to any non-zero value in the discovery bsscfg 619 * to ensure our P2P probe responses have the privacy bit 620 * set in the 802.11 WPA IE. Some peer devices may not 621 * initiate WPS with us if this bit is not set. 622 */ 623 ret = brcmf_fil_bsscfg_int_set(vif->ifp, "wsec", AES_ENABLED); 624 if (ret < 0) { 625 bphy_err(drvr, "wsec error %d\n", ret); 626 goto exit; 627 } 628 629 set_bit(BRCMF_P2P_STATUS_ENABLED, &p2p->status); 630 exit: 631 return ret; 632 } 633 634 /** 635 * brcmf_p2p_escan() - initiate a P2P scan. 636 * 637 * @p2p: P2P specific data. 638 * @num_chans: number of channels to scan. 639 * @chanspecs: channel parameters for @num_chans channels. 640 * @search_state: P2P discover state to use. 641 * @bss_type: type of P2P bss. 642 */ 643 static s32 brcmf_p2p_escan(struct brcmf_p2p_info *p2p, u32 num_chans, 644 u16 chanspecs[], s32 search_state, 645 enum p2p_bss_type bss_type) 646 { 647 struct brcmf_pub *drvr = p2p->cfg->pub; 648 s32 ret = 0; 649 s32 memsize = offsetof(struct brcmf_p2p_scan_le, 650 eparams.params_le.channel_list); 651 s32 nprobes; 652 s32 active; 653 u32 i; 654 u8 *memblk; 655 struct brcmf_cfg80211_vif *vif; 656 struct brcmf_p2p_scan_le *p2p_params; 657 struct brcmf_scan_params_le *sparams; 658 659 memsize += num_chans * sizeof(__le16); 660 memblk = kzalloc(memsize, GFP_KERNEL); 661 if (!memblk) 662 return -ENOMEM; 663 664 vif = p2p->bss_idx[bss_type].vif; 665 if (vif == NULL) { 666 bphy_err(drvr, "no vif for bss type %d\n", bss_type); 667 ret = -EINVAL; 668 goto exit; 669 } 670 p2p_params = (struct brcmf_p2p_scan_le *)memblk; 671 sparams = &p2p_params->eparams.params_le; 672 673 switch (search_state) { 674 case WL_P2P_DISC_ST_SEARCH: 675 /* 676 * If we in SEARCH STATE, we don't need to set SSID explictly 677 * because dongle use P2P WILDCARD internally by default, use 678 * null ssid, which it is already due to kzalloc. 679 */ 680 break; 681 case WL_P2P_DISC_ST_SCAN: 682 /* 683 * wpa_supplicant has p2p_find command with type social or 684 * progressive. For progressive, we need to set the ssid to 685 * P2P WILDCARD because we just do broadcast scan unless 686 * setting SSID. 687 */ 688 sparams->ssid_le.SSID_len = 689 cpu_to_le32(BRCMF_P2P_WILDCARD_SSID_LEN); 690 memcpy(sparams->ssid_le.SSID, BRCMF_P2P_WILDCARD_SSID, 691 BRCMF_P2P_WILDCARD_SSID_LEN); 692 break; 693 default: 694 bphy_err(drvr, " invalid search state %d\n", search_state); 695 ret = -EINVAL; 696 goto exit; 697 } 698 699 brcmf_p2p_set_discover_state(vif->ifp, search_state, 0, 0); 700 701 /* 702 * set p2p scan parameters. 703 */ 704 p2p_params->type = 'E'; 705 706 /* determine the scan engine parameters */ 707 sparams->bss_type = DOT11_BSSTYPE_ANY; 708 sparams->scan_type = BRCMF_SCANTYPE_ACTIVE; 709 710 eth_broadcast_addr(sparams->bssid); 711 sparams->home_time = cpu_to_le32(P2PAPI_SCAN_HOME_TIME_MS); 712 713 /* 714 * SOCIAL_CHAN_CNT + 1 takes care of the Progressive scan 715 * supported by the supplicant. 716 */ 717 if (num_chans == SOCIAL_CHAN_CNT || num_chans == (SOCIAL_CHAN_CNT + 1)) 718 active = P2PAPI_SCAN_SOCIAL_DWELL_TIME_MS; 719 else if (num_chans == AF_PEER_SEARCH_CNT) 720 active = P2PAPI_SCAN_AF_SEARCH_DWELL_TIME_MS; 721 else if (brcmf_get_vif_state_any(p2p->cfg, BRCMF_VIF_STATUS_CONNECTED)) 722 active = -1; 723 else 724 active = P2PAPI_SCAN_DWELL_TIME_MS; 725 726 /* Override scan params to find a peer for a connection */ 727 if (num_chans == 1) { 728 active = WL_SCAN_CONNECT_DWELL_TIME_MS; 729 /* WAR to sync with presence period of VSDB GO. 730 * send probe request more frequently 731 */ 732 nprobes = active / WL_SCAN_JOIN_PROBE_INTERVAL_MS; 733 } else { 734 nprobes = active / P2PAPI_SCAN_NPROBS_TIME_MS; 735 } 736 737 if (nprobes <= 0) 738 nprobes = 1; 739 740 brcmf_dbg(INFO, "nprobes # %d, active_time %d\n", nprobes, active); 741 sparams->active_time = cpu_to_le32(active); 742 sparams->nprobes = cpu_to_le32(nprobes); 743 sparams->passive_time = cpu_to_le32(-1); 744 sparams->channel_num = cpu_to_le32(num_chans & 745 BRCMF_SCAN_PARAMS_COUNT_MASK); 746 for (i = 0; i < num_chans; i++) 747 sparams->channel_list[i] = cpu_to_le16(chanspecs[i]); 748 749 /* set the escan specific parameters */ 750 p2p_params->eparams.version = cpu_to_le32(BRCMF_ESCAN_REQ_VERSION); 751 p2p_params->eparams.action = cpu_to_le16(WL_ESCAN_ACTION_START); 752 p2p_params->eparams.sync_id = cpu_to_le16(0x1234); 753 /* perform p2p scan on primary device */ 754 ret = brcmf_fil_bsscfg_data_set(vif->ifp, "p2p_scan", memblk, memsize); 755 if (!ret) 756 set_bit(BRCMF_SCAN_STATUS_BUSY, &p2p->cfg->scan_status); 757 exit: 758 kfree(memblk); 759 return ret; 760 } 761 762 /** 763 * brcmf_p2p_run_escan() - escan callback for peer-to-peer. 764 * 765 * @cfg: driver private data for cfg80211 interface. 766 * @ifp: interface control. 767 * @request: scan request from cfg80211. 768 * 769 * Determines the P2P discovery state based to scan request parameters and 770 * validates the channels in the request. 771 */ 772 static s32 brcmf_p2p_run_escan(struct brcmf_cfg80211_info *cfg, 773 struct brcmf_if *ifp, 774 struct cfg80211_scan_request *request) 775 { 776 struct brcmf_p2p_info *p2p = &cfg->p2p; 777 struct brcmf_pub *drvr = cfg->pub; 778 s32 err = 0; 779 s32 search_state = WL_P2P_DISC_ST_SCAN; 780 struct brcmf_cfg80211_vif *vif; 781 struct net_device *dev = NULL; 782 int i, num_nodfs = 0; 783 u16 *chanspecs; 784 785 brcmf_dbg(TRACE, "enter\n"); 786 787 if (!request) { 788 err = -EINVAL; 789 goto exit; 790 } 791 792 if (request->n_channels) { 793 chanspecs = kcalloc(request->n_channels, sizeof(*chanspecs), 794 GFP_KERNEL); 795 if (!chanspecs) { 796 err = -ENOMEM; 797 goto exit; 798 } 799 vif = p2p->bss_idx[P2PAPI_BSSCFG_CONNECTION].vif; 800 if (vif) 801 dev = vif->wdev.netdev; 802 if (request->n_channels == 3 && 803 request->channels[0]->hw_value == SOCIAL_CHAN_1 && 804 request->channels[1]->hw_value == SOCIAL_CHAN_2 && 805 request->channels[2]->hw_value == SOCIAL_CHAN_3) { 806 /* SOCIAL CHANNELS 1, 6, 11 */ 807 search_state = WL_P2P_DISC_ST_SEARCH; 808 brcmf_dbg(INFO, "P2P SEARCH PHASE START\n"); 809 } else if (dev != NULL && 810 vif->wdev.iftype == NL80211_IFTYPE_P2P_GO) { 811 /* If you are already a GO, then do SEARCH only */ 812 brcmf_dbg(INFO, "Already a GO. Do SEARCH Only\n"); 813 search_state = WL_P2P_DISC_ST_SEARCH; 814 } else { 815 brcmf_dbg(INFO, "P2P SCAN STATE START\n"); 816 } 817 818 /* 819 * no P2P scanning on passive or DFS channels. 820 */ 821 for (i = 0; i < request->n_channels; i++) { 822 struct ieee80211_channel *chan = request->channels[i]; 823 824 if (chan->flags & (IEEE80211_CHAN_RADAR | 825 IEEE80211_CHAN_NO_IR)) 826 continue; 827 828 chanspecs[i] = channel_to_chanspec(&p2p->cfg->d11inf, 829 chan); 830 brcmf_dbg(INFO, "%d: chan=%d, channel spec=%x\n", 831 num_nodfs, chan->hw_value, chanspecs[i]); 832 num_nodfs++; 833 } 834 err = brcmf_p2p_escan(p2p, num_nodfs, chanspecs, search_state, 835 P2PAPI_BSSCFG_DEVICE); 836 kfree(chanspecs); 837 } 838 exit: 839 if (err) 840 bphy_err(drvr, "error (%d)\n", err); 841 return err; 842 } 843 844 845 /** 846 * brcmf_p2p_find_listen_channel() - find listen channel in ie string. 847 * 848 * @ie: string of information elements. 849 * @ie_len: length of string. 850 * 851 * Scan ie for p2p ie and look for attribute 6 channel. If available determine 852 * channel and return it. 853 */ 854 static s32 brcmf_p2p_find_listen_channel(const u8 *ie, u32 ie_len) 855 { 856 u8 channel_ie[5]; 857 s32 listen_channel; 858 s32 err; 859 860 err = cfg80211_get_p2p_attr(ie, ie_len, 861 IEEE80211_P2P_ATTR_LISTEN_CHANNEL, 862 channel_ie, sizeof(channel_ie)); 863 if (err < 0) 864 return err; 865 866 /* listen channel subel length format: */ 867 /* 3(country) + 1(op. class) + 1(chan num) */ 868 listen_channel = (s32)channel_ie[3 + 1]; 869 870 if (listen_channel == SOCIAL_CHAN_1 || 871 listen_channel == SOCIAL_CHAN_2 || 872 listen_channel == SOCIAL_CHAN_3) { 873 brcmf_dbg(INFO, "Found my Listen Channel %d\n", listen_channel); 874 return listen_channel; 875 } 876 877 return -EPERM; 878 } 879 880 881 /** 882 * brcmf_p2p_scan_prep() - prepare scan based on request. 883 * 884 * @wiphy: wiphy device. 885 * @request: scan request from cfg80211. 886 * @vif: vif on which scan request is to be executed. 887 * 888 * Prepare the scan appropriately for type of scan requested. Overrides the 889 * escan .run() callback for peer-to-peer scanning. 890 */ 891 int brcmf_p2p_scan_prep(struct wiphy *wiphy, 892 struct cfg80211_scan_request *request, 893 struct brcmf_cfg80211_vif *vif) 894 { 895 struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy); 896 struct brcmf_p2p_info *p2p = &cfg->p2p; 897 int err; 898 899 if (brcmf_p2p_scan_is_p2p_request(request)) { 900 /* find my listen channel */ 901 err = brcmf_p2p_find_listen_channel(request->ie, 902 request->ie_len); 903 if (err < 0) 904 return err; 905 906 p2p->afx_hdl.my_listen_chan = err; 907 908 clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status); 909 brcmf_dbg(INFO, "P2P: GO_NEG_PHASE status cleared\n"); 910 911 err = brcmf_p2p_enable_discovery(p2p); 912 if (err) 913 return err; 914 915 /* override .run_escan() callback. */ 916 cfg->escan_info.run = brcmf_p2p_run_escan; 917 } 918 return 0; 919 } 920 921 922 /** 923 * brcmf_p2p_discover_listen() - set firmware to discover listen state. 924 * 925 * @p2p: p2p device. 926 * @channel: channel nr for discover listen. 927 * @duration: time in ms to stay on channel. 928 * 929 */ 930 static s32 931 brcmf_p2p_discover_listen(struct brcmf_p2p_info *p2p, u16 channel, u32 duration) 932 { 933 struct brcmf_pub *drvr = p2p->cfg->pub; 934 struct brcmf_cfg80211_vif *vif; 935 struct brcmu_chan ch; 936 s32 err = 0; 937 938 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif; 939 if (!vif) { 940 bphy_err(drvr, "Discovery is not set, so we have nothing to do\n"); 941 err = -EPERM; 942 goto exit; 943 } 944 945 if (test_bit(BRCMF_P2P_STATUS_DISCOVER_LISTEN, &p2p->status)) { 946 bphy_err(drvr, "Previous LISTEN is not completed yet\n"); 947 /* WAR: prevent cookie mismatch in wpa_supplicant return OK */ 948 goto exit; 949 } 950 951 ch.chnum = channel; 952 ch.bw = BRCMU_CHAN_BW_20; 953 p2p->cfg->d11inf.encchspec(&ch); 954 err = brcmf_p2p_set_discover_state(vif->ifp, WL_P2P_DISC_ST_LISTEN, 955 ch.chspec, (u16)duration); 956 if (!err) { 957 set_bit(BRCMF_P2P_STATUS_DISCOVER_LISTEN, &p2p->status); 958 p2p->remain_on_channel_cookie++; 959 } 960 exit: 961 return err; 962 } 963 964 965 /** 966 * brcmf_p2p_remain_on_channel() - put device on channel and stay there. 967 * 968 * @wiphy: wiphy device. 969 * @wdev: wireless device. 970 * @channel: channel to stay on. 971 * @duration: time in ms to remain on channel. 972 * @cookie: cookie. 973 * @rx_addr: Address to match against the destination of received frames 974 */ 975 int brcmf_p2p_remain_on_channel(struct wiphy *wiphy, struct wireless_dev *wdev, 976 struct ieee80211_channel *channel, 977 unsigned int duration, u64 *cookie, 978 const u8 *rx_addr) 979 { 980 struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy); 981 struct brcmf_p2p_info *p2p = &cfg->p2p; 982 s32 err; 983 u16 channel_nr; 984 985 channel_nr = ieee80211_frequency_to_channel(channel->center_freq); 986 brcmf_dbg(TRACE, "Enter, channel: %d, duration ms (%d)\n", channel_nr, 987 duration); 988 989 err = brcmf_p2p_enable_discovery(p2p); 990 if (err) 991 goto exit; 992 err = brcmf_p2p_discover_listen(p2p, channel_nr, duration); 993 if (err) 994 goto exit; 995 996 memcpy(&p2p->remain_on_channel, channel, sizeof(*channel)); 997 *cookie = p2p->remain_on_channel_cookie; 998 cfg80211_ready_on_channel(wdev, *cookie, channel, duration, GFP_KERNEL); 999 1000 exit: 1001 return err; 1002 } 1003 1004 1005 /** 1006 * brcmf_p2p_notify_listen_complete() - p2p listen has completed. 1007 * 1008 * @ifp: interfac control. 1009 * @e: event message. Not used, to make it usable for fweh event dispatcher. 1010 * @data: payload of message. Not used. 1011 * 1012 */ 1013 int brcmf_p2p_notify_listen_complete(struct brcmf_if *ifp, 1014 const struct brcmf_event_msg *e, 1015 void *data) 1016 { 1017 struct brcmf_cfg80211_info *cfg = ifp->drvr->config; 1018 struct brcmf_p2p_info *p2p = &cfg->p2p; 1019 1020 brcmf_dbg(TRACE, "Enter\n"); 1021 if (test_and_clear_bit(BRCMF_P2P_STATUS_DISCOVER_LISTEN, 1022 &p2p->status)) { 1023 if (test_and_clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_AF_LISTEN, 1024 &p2p->status)) { 1025 clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, 1026 &p2p->status); 1027 brcmf_dbg(INFO, "Listen DONE, wake up wait_next_af\n"); 1028 complete(&p2p->wait_next_af); 1029 } 1030 1031 cfg80211_remain_on_channel_expired(&ifp->vif->wdev, 1032 p2p->remain_on_channel_cookie, 1033 &p2p->remain_on_channel, 1034 GFP_KERNEL); 1035 } 1036 return 0; 1037 } 1038 1039 1040 /** 1041 * brcmf_p2p_cancel_remain_on_channel() - cancel p2p listen state. 1042 * 1043 * @ifp: interfac control. 1044 * 1045 */ 1046 void brcmf_p2p_cancel_remain_on_channel(struct brcmf_if *ifp) 1047 { 1048 if (!ifp) 1049 return; 1050 brcmf_p2p_set_discover_state(ifp, WL_P2P_DISC_ST_SCAN, 0, 0); 1051 brcmf_p2p_notify_listen_complete(ifp, NULL, NULL); 1052 } 1053 1054 1055 /** 1056 * brcmf_p2p_act_frm_search() - search function for action frame. 1057 * 1058 * @p2p: p2p device. 1059 * @channel: channel on which action frame is to be trasmitted. 1060 * 1061 * search function to reach at common channel to send action frame. When 1062 * channel is 0 then all social channels will be used to send af 1063 */ 1064 static s32 brcmf_p2p_act_frm_search(struct brcmf_p2p_info *p2p, u16 channel) 1065 { 1066 struct brcmf_pub *drvr = p2p->cfg->pub; 1067 s32 err; 1068 u32 channel_cnt; 1069 u16 *default_chan_list; 1070 u32 i; 1071 struct brcmu_chan ch; 1072 1073 brcmf_dbg(TRACE, "Enter\n"); 1074 1075 if (channel) 1076 channel_cnt = AF_PEER_SEARCH_CNT; 1077 else 1078 channel_cnt = SOCIAL_CHAN_CNT; 1079 default_chan_list = kcalloc(channel_cnt, sizeof(*default_chan_list), 1080 GFP_KERNEL); 1081 if (default_chan_list == NULL) { 1082 bphy_err(drvr, "channel list allocation failed\n"); 1083 err = -ENOMEM; 1084 goto exit; 1085 } 1086 ch.bw = BRCMU_CHAN_BW_20; 1087 if (channel) { 1088 ch.chnum = channel; 1089 p2p->cfg->d11inf.encchspec(&ch); 1090 /* insert same channel to the chan_list */ 1091 for (i = 0; i < channel_cnt; i++) 1092 default_chan_list[i] = ch.chspec; 1093 } else { 1094 ch.chnum = SOCIAL_CHAN_1; 1095 p2p->cfg->d11inf.encchspec(&ch); 1096 default_chan_list[0] = ch.chspec; 1097 ch.chnum = SOCIAL_CHAN_2; 1098 p2p->cfg->d11inf.encchspec(&ch); 1099 default_chan_list[1] = ch.chspec; 1100 ch.chnum = SOCIAL_CHAN_3; 1101 p2p->cfg->d11inf.encchspec(&ch); 1102 default_chan_list[2] = ch.chspec; 1103 } 1104 err = brcmf_p2p_escan(p2p, channel_cnt, default_chan_list, 1105 WL_P2P_DISC_ST_SEARCH, P2PAPI_BSSCFG_DEVICE); 1106 kfree(default_chan_list); 1107 exit: 1108 return err; 1109 } 1110 1111 1112 /** 1113 * brcmf_p2p_afx_handler() - afx worker thread. 1114 * 1115 * @work: 1116 * 1117 */ 1118 static void brcmf_p2p_afx_handler(struct work_struct *work) 1119 { 1120 struct afx_hdl *afx_hdl = container_of(work, struct afx_hdl, afx_work); 1121 struct brcmf_p2p_info *p2p = container_of(afx_hdl, 1122 struct brcmf_p2p_info, 1123 afx_hdl); 1124 struct brcmf_pub *drvr = p2p->cfg->pub; 1125 s32 err; 1126 1127 if (!afx_hdl->is_active) 1128 return; 1129 1130 if (afx_hdl->is_listen && afx_hdl->my_listen_chan) 1131 /* 100ms ~ 300ms */ 1132 err = brcmf_p2p_discover_listen(p2p, afx_hdl->my_listen_chan, 1133 100 * get_random_u32_inclusive(1, 3)); 1134 else 1135 err = brcmf_p2p_act_frm_search(p2p, afx_hdl->peer_listen_chan); 1136 1137 if (err) { 1138 bphy_err(drvr, "ERROR occurred! value is (%d)\n", err); 1139 if (test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, 1140 &p2p->status)) 1141 complete(&afx_hdl->act_frm_scan); 1142 } 1143 } 1144 1145 1146 /** 1147 * brcmf_p2p_af_searching_channel() - search channel. 1148 * 1149 * @p2p: p2p device info struct. 1150 * 1151 */ 1152 static s32 brcmf_p2p_af_searching_channel(struct brcmf_p2p_info *p2p) 1153 { 1154 struct afx_hdl *afx_hdl = &p2p->afx_hdl; 1155 struct brcmf_cfg80211_vif *pri_vif; 1156 s32 retry; 1157 1158 brcmf_dbg(TRACE, "Enter\n"); 1159 1160 pri_vif = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif; 1161 1162 reinit_completion(&afx_hdl->act_frm_scan); 1163 set_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status); 1164 afx_hdl->is_active = true; 1165 afx_hdl->peer_chan = P2P_INVALID_CHANNEL; 1166 1167 /* Loop to wait until we find a peer's channel or the 1168 * pending action frame tx is cancelled. 1169 */ 1170 retry = 0; 1171 while ((retry < P2P_CHANNEL_SYNC_RETRY) && 1172 (afx_hdl->peer_chan == P2P_INVALID_CHANNEL)) { 1173 afx_hdl->is_listen = false; 1174 brcmf_dbg(TRACE, "Scheduling action frame for sending.. (%d)\n", 1175 retry); 1176 /* search peer on peer's listen channel */ 1177 schedule_work(&afx_hdl->afx_work); 1178 wait_for_completion_timeout(&afx_hdl->act_frm_scan, 1179 P2P_AF_FRM_SCAN_MAX_WAIT); 1180 if ((afx_hdl->peer_chan != P2P_INVALID_CHANNEL) || 1181 (!test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, 1182 &p2p->status))) 1183 break; 1184 1185 if (afx_hdl->my_listen_chan) { 1186 brcmf_dbg(TRACE, "Scheduling listen peer, channel=%d\n", 1187 afx_hdl->my_listen_chan); 1188 /* listen on my listen channel */ 1189 afx_hdl->is_listen = true; 1190 schedule_work(&afx_hdl->afx_work); 1191 wait_for_completion_timeout(&afx_hdl->act_frm_scan, 1192 P2P_AF_FRM_SCAN_MAX_WAIT); 1193 } 1194 if ((afx_hdl->peer_chan != P2P_INVALID_CHANNEL) || 1195 (!test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, 1196 &p2p->status))) 1197 break; 1198 retry++; 1199 1200 /* if sta is connected or connecting, sleep for a while before 1201 * retry af tx or finding a peer 1202 */ 1203 if (test_bit(BRCMF_VIF_STATUS_CONNECTED, &pri_vif->sme_state) || 1204 test_bit(BRCMF_VIF_STATUS_CONNECTING, &pri_vif->sme_state)) 1205 msleep(P2P_DEFAULT_SLEEP_TIME_VSDB); 1206 } 1207 1208 brcmf_dbg(TRACE, "Completed search/listen peer_chan=%d\n", 1209 afx_hdl->peer_chan); 1210 afx_hdl->is_active = false; 1211 1212 clear_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status); 1213 1214 return afx_hdl->peer_chan; 1215 } 1216 1217 1218 /** 1219 * brcmf_p2p_scan_finding_common_channel() - was escan used for finding channel 1220 * 1221 * @cfg: common configuration struct. 1222 * @bi: bss info struct, result from scan. 1223 * 1224 */ 1225 bool brcmf_p2p_scan_finding_common_channel(struct brcmf_cfg80211_info *cfg, 1226 struct brcmf_bss_info_le *bi) 1227 1228 { 1229 struct brcmf_p2p_info *p2p = &cfg->p2p; 1230 struct afx_hdl *afx_hdl = &p2p->afx_hdl; 1231 struct brcmu_chan ch; 1232 u8 *ie; 1233 s32 err; 1234 u8 p2p_dev_addr[ETH_ALEN]; 1235 1236 if (!test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status)) 1237 return false; 1238 1239 if (bi == NULL) { 1240 brcmf_dbg(TRACE, "ACTION FRAME SCAN Done\n"); 1241 if (afx_hdl->peer_chan == P2P_INVALID_CHANNEL) 1242 complete(&afx_hdl->act_frm_scan); 1243 return true; 1244 } 1245 1246 ie = ((u8 *)bi) + le16_to_cpu(bi->ie_offset); 1247 memset(p2p_dev_addr, 0, sizeof(p2p_dev_addr)); 1248 err = cfg80211_get_p2p_attr(ie, le32_to_cpu(bi->ie_length), 1249 IEEE80211_P2P_ATTR_DEVICE_INFO, 1250 p2p_dev_addr, sizeof(p2p_dev_addr)); 1251 if (err < 0) 1252 err = cfg80211_get_p2p_attr(ie, le32_to_cpu(bi->ie_length), 1253 IEEE80211_P2P_ATTR_DEVICE_ID, 1254 p2p_dev_addr, sizeof(p2p_dev_addr)); 1255 if ((err >= 0) && 1256 (ether_addr_equal(p2p_dev_addr, afx_hdl->tx_dst_addr))) { 1257 if (!bi->ctl_ch) { 1258 ch.chspec = le16_to_cpu(bi->chanspec); 1259 cfg->d11inf.decchspec(&ch); 1260 bi->ctl_ch = ch.control_ch_num; 1261 } 1262 afx_hdl->peer_chan = bi->ctl_ch; 1263 brcmf_dbg(TRACE, "ACTION FRAME SCAN : Peer %pM found, channel : %d\n", 1264 afx_hdl->tx_dst_addr, afx_hdl->peer_chan); 1265 complete(&afx_hdl->act_frm_scan); 1266 } 1267 return true; 1268 } 1269 1270 /** 1271 * brcmf_p2p_abort_action_frame() - abort action frame. 1272 * 1273 * @cfg: common configuration struct. 1274 * 1275 */ 1276 static s32 brcmf_p2p_abort_action_frame(struct brcmf_cfg80211_info *cfg) 1277 { 1278 struct brcmf_p2p_info *p2p = &cfg->p2p; 1279 struct brcmf_cfg80211_vif *vif; 1280 s32 err; 1281 s32 int_val = 1; 1282 1283 brcmf_dbg(TRACE, "Enter\n"); 1284 1285 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif; 1286 err = brcmf_fil_bsscfg_data_set(vif->ifp, "actframe_abort", &int_val, 1287 sizeof(s32)); 1288 if (err) 1289 brcmf_err(" aborting action frame has failed (%d)\n", err); 1290 1291 return err; 1292 } 1293 1294 /** 1295 * brcmf_p2p_stop_wait_next_action_frame() - finish scan if af tx complete. 1296 * 1297 * @cfg: common configuration struct. 1298 * 1299 */ 1300 static void 1301 brcmf_p2p_stop_wait_next_action_frame(struct brcmf_cfg80211_info *cfg) 1302 { 1303 struct brcmf_p2p_info *p2p = &cfg->p2p; 1304 struct brcmf_if *ifp = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->ifp; 1305 s32 err; 1306 1307 if (test_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status) && 1308 (test_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status) || 1309 test_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status))) { 1310 brcmf_dbg(TRACE, "*** Wake UP ** abort actframe iovar\n"); 1311 /* if channel is not zero, "actfame" uses off channel scan. 1312 * So abort scan for off channel completion. 1313 */ 1314 if (p2p->af_sent_channel) { 1315 /* abort actframe using actframe_abort or abort scan */ 1316 err = brcmf_p2p_abort_action_frame(cfg); 1317 if (err) 1318 brcmf_notify_escan_complete(cfg, ifp, true, 1319 true); 1320 } 1321 } else if (test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_AF_LISTEN, 1322 &p2p->status)) { 1323 brcmf_dbg(TRACE, "*** Wake UP ** abort listen for next af frame\n"); 1324 /* So abort scan to cancel listen */ 1325 brcmf_notify_escan_complete(cfg, ifp, true, true); 1326 } 1327 } 1328 1329 1330 /** 1331 * brcmf_p2p_gon_req_collision() - Check if go negotiaton collission 1332 * 1333 * @p2p: p2p device info struct. 1334 * @mac: MAC address. 1335 * 1336 * return true if recevied action frame is to be dropped. 1337 */ 1338 static bool 1339 brcmf_p2p_gon_req_collision(struct brcmf_p2p_info *p2p, u8 *mac) 1340 { 1341 struct brcmf_cfg80211_info *cfg = p2p->cfg; 1342 struct brcmf_if *ifp; 1343 1344 brcmf_dbg(TRACE, "Enter\n"); 1345 1346 if (!test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status) || 1347 !p2p->gon_req_action) 1348 return false; 1349 1350 brcmf_dbg(TRACE, "GO Negotiation Request COLLISION !!!\n"); 1351 /* if sa(peer) addr is less than da(my) addr, then this device 1352 * process peer's gon request and block to send gon req. 1353 * if not (sa addr > da addr), 1354 * this device will process gon request and drop gon req of peer. 1355 */ 1356 ifp = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif->ifp; 1357 if (memcmp(mac, ifp->mac_addr, ETH_ALEN) < 0) { 1358 brcmf_dbg(INFO, "Block transmit gon req !!!\n"); 1359 p2p->block_gon_req_tx = true; 1360 /* if we are finding a common channel for sending af, 1361 * do not scan more to block to send current gon req 1362 */ 1363 if (test_and_clear_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, 1364 &p2p->status)) 1365 complete(&p2p->afx_hdl.act_frm_scan); 1366 if (test_and_clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, 1367 &p2p->status)) 1368 brcmf_p2p_stop_wait_next_action_frame(cfg); 1369 return false; 1370 } 1371 1372 /* drop gon request of peer to process gon request by this device. */ 1373 brcmf_dbg(INFO, "Drop received gon req !!!\n"); 1374 1375 return true; 1376 } 1377 1378 1379 /** 1380 * brcmf_p2p_notify_action_frame_rx() - received action frame. 1381 * 1382 * @ifp: interfac control. 1383 * @e: event message. Not used, to make it usable for fweh event dispatcher. 1384 * @data: payload of message, containing action frame data. 1385 * 1386 */ 1387 int brcmf_p2p_notify_action_frame_rx(struct brcmf_if *ifp, 1388 const struct brcmf_event_msg *e, 1389 void *data) 1390 { 1391 struct brcmf_pub *drvr = ifp->drvr; 1392 struct brcmf_cfg80211_info *cfg = drvr->config; 1393 struct brcmf_p2p_info *p2p = &cfg->p2p; 1394 struct afx_hdl *afx_hdl = &p2p->afx_hdl; 1395 struct wireless_dev *wdev; 1396 u32 mgmt_frame_len = e->datalen - sizeof(struct brcmf_rx_mgmt_data); 1397 struct brcmf_rx_mgmt_data *rxframe = (struct brcmf_rx_mgmt_data *)data; 1398 u8 *frame = (u8 *)(rxframe + 1); 1399 struct brcmf_p2p_pub_act_frame *act_frm; 1400 struct brcmf_p2psd_gas_pub_act_frame *sd_act_frm; 1401 struct brcmu_chan ch; 1402 struct ieee80211_mgmt *mgmt_frame; 1403 s32 freq; 1404 u16 mgmt_type; 1405 u8 action; 1406 1407 if (e->datalen < sizeof(*rxframe)) { 1408 brcmf_dbg(SCAN, "Event data too small. Ignore\n"); 1409 return 0; 1410 } 1411 1412 ch.chspec = be16_to_cpu(rxframe->chanspec); 1413 cfg->d11inf.decchspec(&ch); 1414 /* Check if wpa_supplicant has registered for this frame */ 1415 brcmf_dbg(INFO, "ifp->vif->mgmt_rx_reg %04x\n", ifp->vif->mgmt_rx_reg); 1416 mgmt_type = (IEEE80211_STYPE_ACTION & IEEE80211_FCTL_STYPE) >> 4; 1417 if ((ifp->vif->mgmt_rx_reg & BIT(mgmt_type)) == 0) 1418 return 0; 1419 1420 brcmf_p2p_print_actframe(false, frame, mgmt_frame_len); 1421 1422 action = P2P_PAF_SUBTYPE_INVALID; 1423 if (brcmf_p2p_is_pub_action(frame, mgmt_frame_len)) { 1424 act_frm = (struct brcmf_p2p_pub_act_frame *)frame; 1425 action = act_frm->subtype; 1426 if ((action == P2P_PAF_GON_REQ) && 1427 (brcmf_p2p_gon_req_collision(p2p, (u8 *)e->addr))) { 1428 if (test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, 1429 &p2p->status) && 1430 (ether_addr_equal(afx_hdl->tx_dst_addr, e->addr))) { 1431 afx_hdl->peer_chan = ch.control_ch_num; 1432 brcmf_dbg(INFO, "GON request: Peer found, channel=%d\n", 1433 afx_hdl->peer_chan); 1434 complete(&afx_hdl->act_frm_scan); 1435 } 1436 return 0; 1437 } 1438 /* After complete GO Negotiation, roll back to mpc mode */ 1439 if ((action == P2P_PAF_GON_CONF) || 1440 (action == P2P_PAF_PROVDIS_RSP)) 1441 brcmf_set_mpc(ifp, 1); 1442 if (action == P2P_PAF_GON_CONF) { 1443 brcmf_dbg(TRACE, "P2P: GO_NEG_PHASE status cleared\n"); 1444 clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status); 1445 } 1446 } else if (brcmf_p2p_is_gas_action(frame, mgmt_frame_len)) { 1447 sd_act_frm = (struct brcmf_p2psd_gas_pub_act_frame *)frame; 1448 action = sd_act_frm->action; 1449 } 1450 1451 if (test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status) && 1452 (p2p->next_af_subtype == action)) { 1453 brcmf_dbg(TRACE, "We got a right next frame! (%d)\n", action); 1454 clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, 1455 &p2p->status); 1456 /* Stop waiting for next AF. */ 1457 brcmf_p2p_stop_wait_next_action_frame(cfg); 1458 } 1459 1460 mgmt_frame = kzalloc(offsetof(struct ieee80211_mgmt, u) + 1461 mgmt_frame_len, GFP_KERNEL); 1462 if (!mgmt_frame) { 1463 bphy_err(drvr, "No memory available for action frame\n"); 1464 return -ENOMEM; 1465 } 1466 memcpy(mgmt_frame->da, ifp->mac_addr, ETH_ALEN); 1467 brcmf_fil_cmd_data_get(ifp, BRCMF_C_GET_BSSID, mgmt_frame->bssid, 1468 ETH_ALEN); 1469 memcpy(mgmt_frame->sa, e->addr, ETH_ALEN); 1470 mgmt_frame->frame_control = cpu_to_le16(IEEE80211_STYPE_ACTION); 1471 memcpy(mgmt_frame->u.body, frame, mgmt_frame_len); 1472 mgmt_frame_len += offsetof(struct ieee80211_mgmt, u.body); 1473 1474 freq = ieee80211_channel_to_frequency(ch.control_ch_num, 1475 ch.band == BRCMU_CHAN_BAND_2G ? 1476 NL80211_BAND_2GHZ : 1477 NL80211_BAND_5GHZ); 1478 1479 wdev = &ifp->vif->wdev; 1480 cfg80211_rx_mgmt(wdev, freq, 0, (u8 *)mgmt_frame, mgmt_frame_len, 0); 1481 1482 kfree(mgmt_frame); 1483 return 0; 1484 } 1485 1486 1487 /** 1488 * brcmf_p2p_notify_action_tx_complete() - transmit action frame complete 1489 * 1490 * @ifp: interfac control. 1491 * @e: event message. Not used, to make it usable for fweh event dispatcher. 1492 * @data: not used. 1493 * 1494 */ 1495 int brcmf_p2p_notify_action_tx_complete(struct brcmf_if *ifp, 1496 const struct brcmf_event_msg *e, 1497 void *data) 1498 { 1499 struct brcmf_cfg80211_info *cfg = ifp->drvr->config; 1500 struct brcmf_p2p_info *p2p = &cfg->p2p; 1501 1502 brcmf_dbg(INFO, "Enter: event %s, status=%d\n", 1503 e->event_code == BRCMF_E_ACTION_FRAME_OFF_CHAN_COMPLETE ? 1504 "ACTION_FRAME_OFF_CHAN_COMPLETE" : "ACTION_FRAME_COMPLETE", 1505 e->status); 1506 1507 if (!test_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status)) 1508 return 0; 1509 1510 if (e->event_code == BRCMF_E_ACTION_FRAME_COMPLETE) { 1511 if (e->status == BRCMF_E_STATUS_SUCCESS) { 1512 set_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, 1513 &p2p->status); 1514 if (!p2p->wait_for_offchan_complete) 1515 complete(&p2p->send_af_done); 1516 } else { 1517 set_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status); 1518 /* If there is no ack, we don't need to wait for 1519 * WLC_E_ACTION_FRAME_OFFCHAN_COMPLETE event 1520 */ 1521 brcmf_p2p_stop_wait_next_action_frame(cfg); 1522 } 1523 1524 } else { 1525 complete(&p2p->send_af_done); 1526 } 1527 return 0; 1528 } 1529 1530 1531 /** 1532 * brcmf_p2p_tx_action_frame() - send action frame over fil. 1533 * 1534 * @ifp: interface to transmit on. 1535 * @p2p: p2p info struct for vif. 1536 * @af_params: action frame data/info. 1537 * 1538 * Send an action frame immediately without doing channel synchronization. 1539 * 1540 * This function waits for a completion event before returning. 1541 * The WLC_E_ACTION_FRAME_COMPLETE event will be received when the action 1542 * frame is transmitted. 1543 */ 1544 static s32 brcmf_p2p_tx_action_frame(struct brcmf_if *ifp, 1545 struct brcmf_p2p_info *p2p, 1546 struct brcmf_fil_af_params_le *af_params) 1547 { 1548 struct brcmf_pub *drvr = p2p->cfg->pub; 1549 s32 err = 0; 1550 1551 brcmf_dbg(TRACE, "Enter\n"); 1552 1553 reinit_completion(&p2p->send_af_done); 1554 clear_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status); 1555 clear_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status); 1556 1557 err = brcmf_fil_bsscfg_data_set(ifp, "actframe", af_params, 1558 sizeof(*af_params)); 1559 if (err) { 1560 bphy_err(drvr, " sending action frame has failed\n"); 1561 goto exit; 1562 } 1563 1564 p2p->af_sent_channel = le32_to_cpu(af_params->channel); 1565 p2p->af_tx_sent_jiffies = jiffies; 1566 1567 if (test_bit(BRCMF_P2P_STATUS_DISCOVER_LISTEN, &p2p->status) && 1568 p2p->af_sent_channel == 1569 ieee80211_frequency_to_channel(p2p->remain_on_channel.center_freq)) 1570 p2p->wait_for_offchan_complete = false; 1571 else 1572 p2p->wait_for_offchan_complete = true; 1573 1574 brcmf_dbg(TRACE, "Waiting for %s tx completion event\n", 1575 (p2p->wait_for_offchan_complete) ? 1576 "off-channel" : "on-channel"); 1577 1578 wait_for_completion_timeout(&p2p->send_af_done, P2P_AF_MAX_WAIT_TIME); 1579 1580 if (test_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status)) { 1581 brcmf_dbg(TRACE, "TX action frame operation is success\n"); 1582 } else { 1583 err = -EIO; 1584 brcmf_dbg(TRACE, "TX action frame operation has failed\n"); 1585 } 1586 /* clear status bit for action tx */ 1587 clear_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status); 1588 clear_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status); 1589 1590 exit: 1591 return err; 1592 } 1593 1594 1595 /** 1596 * brcmf_p2p_pub_af_tx() - public action frame tx routine. 1597 * 1598 * @cfg: driver private data for cfg80211 interface. 1599 * @af_params: action frame data/info. 1600 * @config_af_params: configuration data for action frame. 1601 * 1602 * routine which transmits ation frame public type. 1603 */ 1604 static s32 brcmf_p2p_pub_af_tx(struct brcmf_cfg80211_info *cfg, 1605 struct brcmf_fil_af_params_le *af_params, 1606 struct brcmf_config_af_params *config_af_params) 1607 { 1608 struct brcmf_p2p_info *p2p = &cfg->p2p; 1609 struct brcmf_pub *drvr = cfg->pub; 1610 struct brcmf_fil_action_frame_le *action_frame; 1611 struct brcmf_p2p_pub_act_frame *act_frm; 1612 s32 err = 0; 1613 u16 ie_len; 1614 1615 action_frame = &af_params->action_frame; 1616 act_frm = (struct brcmf_p2p_pub_act_frame *)(action_frame->data); 1617 1618 config_af_params->extra_listen = true; 1619 1620 switch (act_frm->subtype) { 1621 case P2P_PAF_GON_REQ: 1622 brcmf_dbg(TRACE, "P2P: GO_NEG_PHASE status set\n"); 1623 set_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status); 1624 config_af_params->mpc_onoff = 0; 1625 config_af_params->search_channel = true; 1626 p2p->next_af_subtype = act_frm->subtype + 1; 1627 p2p->gon_req_action = true; 1628 /* increase dwell time to wait for RESP frame */ 1629 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME); 1630 break; 1631 case P2P_PAF_GON_RSP: 1632 p2p->next_af_subtype = act_frm->subtype + 1; 1633 /* increase dwell time to wait for CONF frame */ 1634 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME); 1635 break; 1636 case P2P_PAF_GON_CONF: 1637 /* If we reached till GO Neg confirmation reset the filter */ 1638 brcmf_dbg(TRACE, "P2P: GO_NEG_PHASE status cleared\n"); 1639 clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status); 1640 /* turn on mpc again if go nego is done */ 1641 config_af_params->mpc_onoff = 1; 1642 /* minimize dwell time */ 1643 af_params->dwell_time = cpu_to_le32(P2P_AF_MIN_DWELL_TIME); 1644 config_af_params->extra_listen = false; 1645 break; 1646 case P2P_PAF_INVITE_REQ: 1647 config_af_params->search_channel = true; 1648 p2p->next_af_subtype = act_frm->subtype + 1; 1649 /* increase dwell time */ 1650 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME); 1651 break; 1652 case P2P_PAF_INVITE_RSP: 1653 /* minimize dwell time */ 1654 af_params->dwell_time = cpu_to_le32(P2P_AF_MIN_DWELL_TIME); 1655 config_af_params->extra_listen = false; 1656 break; 1657 case P2P_PAF_DEVDIS_REQ: 1658 config_af_params->search_channel = true; 1659 p2p->next_af_subtype = act_frm->subtype + 1; 1660 /* maximize dwell time to wait for RESP frame */ 1661 af_params->dwell_time = cpu_to_le32(P2P_AF_LONG_DWELL_TIME); 1662 break; 1663 case P2P_PAF_DEVDIS_RSP: 1664 /* minimize dwell time */ 1665 af_params->dwell_time = cpu_to_le32(P2P_AF_MIN_DWELL_TIME); 1666 config_af_params->extra_listen = false; 1667 break; 1668 case P2P_PAF_PROVDIS_REQ: 1669 ie_len = le16_to_cpu(action_frame->len) - 1670 offsetof(struct brcmf_p2p_pub_act_frame, elts); 1671 if (cfg80211_get_p2p_attr(&act_frm->elts[0], ie_len, 1672 IEEE80211_P2P_ATTR_GROUP_ID, 1673 NULL, 0) < 0) 1674 config_af_params->search_channel = true; 1675 config_af_params->mpc_onoff = 0; 1676 p2p->next_af_subtype = act_frm->subtype + 1; 1677 /* increase dwell time to wait for RESP frame */ 1678 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME); 1679 break; 1680 case P2P_PAF_PROVDIS_RSP: 1681 /* wpa_supplicant send go nego req right after prov disc */ 1682 p2p->next_af_subtype = P2P_PAF_GON_REQ; 1683 /* increase dwell time to MED level */ 1684 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME); 1685 config_af_params->extra_listen = false; 1686 break; 1687 default: 1688 bphy_err(drvr, "Unknown p2p pub act frame subtype: %d\n", 1689 act_frm->subtype); 1690 err = -EINVAL; 1691 } 1692 return err; 1693 } 1694 1695 static bool brcmf_p2p_check_dwell_overflow(u32 requested_dwell, 1696 unsigned long dwell_jiffies) 1697 { 1698 if ((requested_dwell & CUSTOM_RETRY_MASK) && 1699 (jiffies_to_msecs(jiffies - dwell_jiffies) > 1700 (requested_dwell & ~CUSTOM_RETRY_MASK))) { 1701 brcmf_err("Action frame TX retry time over dwell time!\n"); 1702 return true; 1703 } 1704 return false; 1705 } 1706 /** 1707 * brcmf_p2p_send_action_frame() - send action frame . 1708 * 1709 * @ifp: interface to transmit on. 1710 * @af_params: configuration data for action frame. 1711 */ 1712 bool brcmf_p2p_send_action_frame(struct brcmf_if *ifp, 1713 struct brcmf_fil_af_params_le *af_params) 1714 { 1715 struct brcmf_cfg80211_info *cfg = ifp->drvr->config; 1716 struct brcmf_p2p_info *p2p = &cfg->p2p; 1717 struct brcmf_fil_action_frame_le *action_frame; 1718 struct brcmf_config_af_params config_af_params; 1719 struct afx_hdl *afx_hdl = &p2p->afx_hdl; 1720 struct brcmf_pub *drvr = cfg->pub; 1721 u16 action_frame_len; 1722 bool ack = false; 1723 u8 category; 1724 u8 action; 1725 s32 tx_retry; 1726 s32 extra_listen_time; 1727 uint delta_ms; 1728 unsigned long dwell_jiffies = 0; 1729 bool dwell_overflow = false; 1730 1731 u32 requested_dwell = le32_to_cpu(af_params->dwell_time); 1732 action_frame = &af_params->action_frame; 1733 action_frame_len = le16_to_cpu(action_frame->len); 1734 1735 brcmf_p2p_print_actframe(true, action_frame->data, action_frame_len); 1736 1737 /* Add the default dwell time. Dwell time to stay off-channel */ 1738 /* to wait for a response action frame after transmitting an */ 1739 /* GO Negotiation action frame */ 1740 af_params->dwell_time = cpu_to_le32(P2P_AF_DWELL_TIME); 1741 1742 category = action_frame->data[DOT11_ACTION_CAT_OFF]; 1743 action = action_frame->data[DOT11_ACTION_ACT_OFF]; 1744 1745 /* initialize variables */ 1746 p2p->next_af_subtype = P2P_PAF_SUBTYPE_INVALID; 1747 p2p->gon_req_action = false; 1748 1749 /* config parameters */ 1750 config_af_params.mpc_onoff = -1; 1751 config_af_params.search_channel = false; 1752 config_af_params.extra_listen = false; 1753 1754 if (brcmf_p2p_is_pub_action(action_frame->data, action_frame_len)) { 1755 /* p2p public action frame process */ 1756 if (brcmf_p2p_pub_af_tx(cfg, af_params, &config_af_params)) { 1757 /* Just send unknown subtype frame with */ 1758 /* default parameters. */ 1759 bphy_err(drvr, "P2P Public action frame, unknown subtype.\n"); 1760 } 1761 } else if (brcmf_p2p_is_gas_action(action_frame->data, 1762 action_frame_len)) { 1763 /* service discovery process */ 1764 if (action == P2PSD_ACTION_ID_GAS_IREQ || 1765 action == P2PSD_ACTION_ID_GAS_CREQ) { 1766 /* configure service discovery query frame */ 1767 config_af_params.search_channel = true; 1768 1769 /* save next af suptype to cancel */ 1770 /* remaining dwell time */ 1771 p2p->next_af_subtype = action + 1; 1772 1773 af_params->dwell_time = 1774 cpu_to_le32(P2P_AF_MED_DWELL_TIME); 1775 } else if (action == P2PSD_ACTION_ID_GAS_IRESP || 1776 action == P2PSD_ACTION_ID_GAS_CRESP) { 1777 /* configure service discovery response frame */ 1778 af_params->dwell_time = 1779 cpu_to_le32(P2P_AF_MIN_DWELL_TIME); 1780 } else { 1781 bphy_err(drvr, "Unknown action type: %d\n", action); 1782 goto exit; 1783 } 1784 } else if (brcmf_p2p_is_p2p_action(action_frame->data, 1785 action_frame_len)) { 1786 /* do not configure anything. it will be */ 1787 /* sent with a default configuration */ 1788 } else { 1789 bphy_err(drvr, "Unknown Frame: category 0x%x, action 0x%x\n", 1790 category, action); 1791 return false; 1792 } 1793 1794 /* if connecting on primary iface, sleep for a while before sending 1795 * af tx for VSDB 1796 */ 1797 if (test_bit(BRCMF_VIF_STATUS_CONNECTING, 1798 &p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->sme_state)) 1799 msleep(50); 1800 1801 /* if scan is ongoing, abort current scan. */ 1802 if (test_bit(BRCMF_SCAN_STATUS_BUSY, &cfg->scan_status)) 1803 brcmf_abort_scanning(cfg); 1804 1805 memcpy(afx_hdl->tx_dst_addr, action_frame->da, ETH_ALEN); 1806 1807 /* To make sure to send successfully action frame, turn off mpc */ 1808 if (config_af_params.mpc_onoff == 0) 1809 brcmf_set_mpc(ifp, 0); 1810 1811 /* set status and destination address before sending af */ 1812 if (p2p->next_af_subtype != P2P_PAF_SUBTYPE_INVALID) { 1813 /* set status to cancel the remained dwell time in rx process */ 1814 set_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status); 1815 } 1816 1817 p2p->af_sent_channel = 0; 1818 set_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status); 1819 /* validate channel and p2p ies */ 1820 if (config_af_params.search_channel && 1821 IS_P2P_SOCIAL_CHANNEL(le32_to_cpu(af_params->channel)) && 1822 p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif->saved_ie.probe_req_ie_len) { 1823 afx_hdl = &p2p->afx_hdl; 1824 afx_hdl->peer_listen_chan = le32_to_cpu(af_params->channel); 1825 1826 if (brcmf_p2p_af_searching_channel(p2p) == 1827 P2P_INVALID_CHANNEL) { 1828 bphy_err(drvr, "Couldn't find peer's channel.\n"); 1829 goto exit; 1830 } 1831 1832 /* Abort scan even for VSDB scenarios. Scan gets aborted in 1833 * firmware but after the check of piggyback algorithm. To take 1834 * care of current piggback algo, lets abort the scan here 1835 * itself. 1836 */ 1837 brcmf_notify_escan_complete(cfg, ifp, true, true); 1838 1839 /* update channel */ 1840 af_params->channel = cpu_to_le32(afx_hdl->peer_chan); 1841 } 1842 dwell_jiffies = jiffies; 1843 dwell_overflow = brcmf_p2p_check_dwell_overflow(requested_dwell, 1844 dwell_jiffies); 1845 1846 tx_retry = 0; 1847 while (!p2p->block_gon_req_tx && 1848 (!ack) && (tx_retry < P2P_AF_TX_MAX_RETRY) && 1849 !dwell_overflow) { 1850 if (af_params->channel) 1851 msleep(P2P_AF_RETRY_DELAY_TIME); 1852 1853 ack = !brcmf_p2p_tx_action_frame(ifp, p2p, af_params); 1854 tx_retry++; 1855 dwell_overflow = brcmf_p2p_check_dwell_overflow(requested_dwell, 1856 dwell_jiffies); 1857 } 1858 if (!ack) { 1859 bphy_err(drvr, "Failed to send Action Frame(retry %d)\n", 1860 tx_retry); 1861 clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status); 1862 } 1863 1864 exit: 1865 clear_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status); 1866 1867 /* WAR: sometimes dongle does not keep the dwell time of 'actframe'. 1868 * if we coundn't get the next action response frame and dongle does 1869 * not keep the dwell time, go to listen state again to get next action 1870 * response frame. 1871 */ 1872 if (ack && config_af_params.extra_listen && !p2p->block_gon_req_tx && 1873 test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status) && 1874 p2p->af_sent_channel == afx_hdl->my_listen_chan) { 1875 delta_ms = jiffies_to_msecs(jiffies - p2p->af_tx_sent_jiffies); 1876 if (le32_to_cpu(af_params->dwell_time) > delta_ms) 1877 extra_listen_time = le32_to_cpu(af_params->dwell_time) - 1878 delta_ms; 1879 else 1880 extra_listen_time = 0; 1881 if (extra_listen_time > 50) { 1882 set_bit(BRCMF_P2P_STATUS_WAITING_NEXT_AF_LISTEN, 1883 &p2p->status); 1884 brcmf_dbg(INFO, "Wait more time! actual af time:%d, calculated extra listen:%d\n", 1885 le32_to_cpu(af_params->dwell_time), 1886 extra_listen_time); 1887 extra_listen_time += 100; 1888 if (!brcmf_p2p_discover_listen(p2p, 1889 p2p->af_sent_channel, 1890 extra_listen_time)) { 1891 unsigned long duration; 1892 1893 extra_listen_time += 100; 1894 duration = msecs_to_jiffies(extra_listen_time); 1895 wait_for_completion_timeout(&p2p->wait_next_af, 1896 duration); 1897 } 1898 clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_AF_LISTEN, 1899 &p2p->status); 1900 } 1901 } 1902 1903 if (p2p->block_gon_req_tx) { 1904 /* if ack is true, supplicant will wait more time(100ms). 1905 * so we will return it as a success to get more time . 1906 */ 1907 p2p->block_gon_req_tx = false; 1908 ack = true; 1909 } 1910 1911 clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status); 1912 /* if all done, turn mpc on again */ 1913 if (config_af_params.mpc_onoff == 1) 1914 brcmf_set_mpc(ifp, 1); 1915 1916 return ack; 1917 } 1918 1919 /** 1920 * brcmf_p2p_notify_rx_mgmt_p2p_probereq() - Event handler for p2p probe req. 1921 * 1922 * @ifp: interface pointer for which event was received. 1923 * @e: even message. 1924 * @data: payload of event message (probe request). 1925 */ 1926 s32 brcmf_p2p_notify_rx_mgmt_p2p_probereq(struct brcmf_if *ifp, 1927 const struct brcmf_event_msg *e, 1928 void *data) 1929 { 1930 struct brcmf_cfg80211_info *cfg = ifp->drvr->config; 1931 struct brcmf_p2p_info *p2p = &cfg->p2p; 1932 struct afx_hdl *afx_hdl = &p2p->afx_hdl; 1933 struct brcmf_cfg80211_vif *vif = ifp->vif; 1934 struct brcmf_rx_mgmt_data *rxframe = (struct brcmf_rx_mgmt_data *)data; 1935 struct brcmu_chan ch; 1936 u8 *mgmt_frame; 1937 u32 mgmt_frame_len; 1938 s32 freq; 1939 u16 mgmt_type; 1940 1941 brcmf_dbg(INFO, "Enter: event %d reason %d\n", e->event_code, 1942 e->reason); 1943 1944 if (e->datalen < sizeof(*rxframe)) { 1945 brcmf_dbg(SCAN, "Event data too small. Ignore\n"); 1946 return 0; 1947 } 1948 1949 ch.chspec = be16_to_cpu(rxframe->chanspec); 1950 cfg->d11inf.decchspec(&ch); 1951 1952 if (test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status) && 1953 (ether_addr_equal(afx_hdl->tx_dst_addr, e->addr))) { 1954 afx_hdl->peer_chan = ch.control_ch_num; 1955 brcmf_dbg(INFO, "PROBE REQUEST: Peer found, channel=%d\n", 1956 afx_hdl->peer_chan); 1957 complete(&afx_hdl->act_frm_scan); 1958 } 1959 1960 /* Firmware sends us two proberesponses for each idx one. At the */ 1961 /* moment anything but bsscfgidx 0 is passed up to supplicant */ 1962 if (e->bsscfgidx == 0) 1963 return 0; 1964 1965 /* Filter any P2P probe reqs arriving during the GO-NEG Phase */ 1966 if (test_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status)) { 1967 brcmf_dbg(INFO, "Filtering P2P probe_req in GO-NEG phase\n"); 1968 return 0; 1969 } 1970 1971 /* Check if wpa_supplicant has registered for this frame */ 1972 brcmf_dbg(INFO, "vif->mgmt_rx_reg %04x\n", vif->mgmt_rx_reg); 1973 mgmt_type = (IEEE80211_STYPE_PROBE_REQ & IEEE80211_FCTL_STYPE) >> 4; 1974 if ((vif->mgmt_rx_reg & BIT(mgmt_type)) == 0) 1975 return 0; 1976 1977 mgmt_frame = (u8 *)(rxframe + 1); 1978 mgmt_frame_len = e->datalen - sizeof(*rxframe); 1979 freq = ieee80211_channel_to_frequency(ch.control_ch_num, 1980 ch.band == BRCMU_CHAN_BAND_2G ? 1981 NL80211_BAND_2GHZ : 1982 NL80211_BAND_5GHZ); 1983 1984 cfg80211_rx_mgmt(&vif->wdev, freq, 0, mgmt_frame, mgmt_frame_len, 0); 1985 1986 brcmf_dbg(INFO, "mgmt_frame_len (%d) , e->datalen (%d), chanspec (%04x), freq (%d)\n", 1987 mgmt_frame_len, e->datalen, ch.chspec, freq); 1988 1989 return 0; 1990 } 1991 1992 1993 /** 1994 * brcmf_p2p_get_current_chanspec() - Get current operation channel. 1995 * 1996 * @p2p: P2P specific data. 1997 * @chanspec: chanspec to be returned. 1998 */ 1999 static void brcmf_p2p_get_current_chanspec(struct brcmf_p2p_info *p2p, 2000 u16 *chanspec) 2001 { 2002 struct brcmf_if *ifp; 2003 u8 mac_addr[ETH_ALEN]; 2004 struct brcmu_chan ch; 2005 struct brcmf_bss_info_le *bi; 2006 u8 *buf; 2007 2008 ifp = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->ifp; 2009 2010 if (brcmf_fil_cmd_data_get(ifp, BRCMF_C_GET_BSSID, mac_addr, 2011 ETH_ALEN) == 0) { 2012 buf = kzalloc(WL_BSS_INFO_MAX, GFP_KERNEL); 2013 if (buf != NULL) { 2014 *(__le32 *)buf = cpu_to_le32(WL_BSS_INFO_MAX); 2015 if (brcmf_fil_cmd_data_get(ifp, BRCMF_C_GET_BSS_INFO, 2016 buf, WL_BSS_INFO_MAX) == 0) { 2017 bi = (struct brcmf_bss_info_le *)(buf + 4); 2018 *chanspec = le16_to_cpu(bi->chanspec); 2019 kfree(buf); 2020 return; 2021 } 2022 kfree(buf); 2023 } 2024 } 2025 /* Use default channel for P2P */ 2026 ch.chnum = BRCMF_P2P_TEMP_CHAN; 2027 ch.bw = BRCMU_CHAN_BW_20; 2028 p2p->cfg->d11inf.encchspec(&ch); 2029 *chanspec = ch.chspec; 2030 } 2031 2032 /** 2033 * brcmf_p2p_ifchange - Change a P2P Role. 2034 * @cfg: driver private data for cfg80211 interface. 2035 * @if_type: interface type. 2036 * Returns 0 if success. 2037 */ 2038 int brcmf_p2p_ifchange(struct brcmf_cfg80211_info *cfg, 2039 enum brcmf_fil_p2p_if_types if_type) 2040 { 2041 struct brcmf_p2p_info *p2p = &cfg->p2p; 2042 struct brcmf_pub *drvr = cfg->pub; 2043 struct brcmf_cfg80211_vif *vif; 2044 struct brcmf_fil_p2p_if_le if_request; 2045 s32 err; 2046 u16 chanspec; 2047 2048 brcmf_dbg(TRACE, "Enter\n"); 2049 2050 vif = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif; 2051 if (!vif) { 2052 bphy_err(drvr, "vif for P2PAPI_BSSCFG_PRIMARY does not exist\n"); 2053 return -EPERM; 2054 } 2055 brcmf_notify_escan_complete(cfg, vif->ifp, true, true); 2056 vif = p2p->bss_idx[P2PAPI_BSSCFG_CONNECTION].vif; 2057 if (!vif) { 2058 bphy_err(drvr, "vif for P2PAPI_BSSCFG_CONNECTION does not exist\n"); 2059 return -EPERM; 2060 } 2061 brcmf_set_mpc(vif->ifp, 0); 2062 2063 /* In concurrency case, STA may be already associated in a particular */ 2064 /* channel. so retrieve the current channel of primary interface and */ 2065 /* then start the virtual interface on that. */ 2066 brcmf_p2p_get_current_chanspec(p2p, &chanspec); 2067 2068 if_request.type = cpu_to_le16((u16)if_type); 2069 if_request.chspec = cpu_to_le16(chanspec); 2070 memcpy(if_request.addr, p2p->conn_int_addr, sizeof(if_request.addr)); 2071 2072 brcmf_cfg80211_arm_vif_event(cfg, vif); 2073 err = brcmf_fil_iovar_data_set(vif->ifp, "p2p_ifupd", &if_request, 2074 sizeof(if_request)); 2075 if (err) { 2076 bphy_err(drvr, "p2p_ifupd FAILED, err=%d\n", err); 2077 brcmf_cfg80211_arm_vif_event(cfg, NULL); 2078 return err; 2079 } 2080 err = brcmf_cfg80211_wait_vif_event(cfg, BRCMF_E_IF_CHANGE, 2081 BRCMF_VIF_EVENT_TIMEOUT); 2082 brcmf_cfg80211_arm_vif_event(cfg, NULL); 2083 if (!err) { 2084 bphy_err(drvr, "No BRCMF_E_IF_CHANGE event received\n"); 2085 return -EIO; 2086 } 2087 2088 err = brcmf_fil_cmd_int_set(vif->ifp, BRCMF_C_SET_SCB_TIMEOUT, 2089 BRCMF_SCB_TIMEOUT_VALUE); 2090 2091 return err; 2092 } 2093 2094 static int brcmf_p2p_request_p2p_if(struct brcmf_p2p_info *p2p, 2095 struct brcmf_if *ifp, u8 ea[ETH_ALEN], 2096 enum brcmf_fil_p2p_if_types iftype) 2097 { 2098 struct brcmf_fil_p2p_if_le if_request; 2099 int err; 2100 u16 chanspec; 2101 2102 /* we need a default channel */ 2103 brcmf_p2p_get_current_chanspec(p2p, &chanspec); 2104 2105 /* fill the firmware request */ 2106 memcpy(if_request.addr, ea, ETH_ALEN); 2107 if_request.type = cpu_to_le16((u16)iftype); 2108 if_request.chspec = cpu_to_le16(chanspec); 2109 2110 err = brcmf_fil_iovar_data_set(ifp, "p2p_ifadd", &if_request, 2111 sizeof(if_request)); 2112 2113 return err; 2114 } 2115 2116 static int brcmf_p2p_disable_p2p_if(struct brcmf_cfg80211_vif *vif) 2117 { 2118 struct brcmf_cfg80211_info *cfg = wdev_to_cfg(&vif->wdev); 2119 struct net_device *pri_ndev = cfg_to_ndev(cfg); 2120 struct brcmf_if *ifp = netdev_priv(pri_ndev); 2121 const u8 *addr = vif->wdev.netdev->dev_addr; 2122 2123 return brcmf_fil_iovar_data_set(ifp, "p2p_ifdis", addr, ETH_ALEN); 2124 } 2125 2126 static int brcmf_p2p_release_p2p_if(struct brcmf_cfg80211_vif *vif) 2127 { 2128 struct brcmf_cfg80211_info *cfg = wdev_to_cfg(&vif->wdev); 2129 struct net_device *pri_ndev = cfg_to_ndev(cfg); 2130 struct brcmf_if *ifp = netdev_priv(pri_ndev); 2131 const u8 *addr = vif->wdev.netdev->dev_addr; 2132 2133 return brcmf_fil_iovar_data_set(ifp, "p2p_ifdel", addr, ETH_ALEN); 2134 } 2135 2136 /** 2137 * brcmf_p2p_create_p2pdev() - create a P2P_DEVICE virtual interface. 2138 * 2139 * @p2p: P2P specific data. 2140 * @wiphy: wiphy device of new interface. 2141 * @addr: mac address for this new interface. 2142 */ 2143 static struct wireless_dev *brcmf_p2p_create_p2pdev(struct brcmf_p2p_info *p2p, 2144 struct wiphy *wiphy, 2145 u8 *addr) 2146 { 2147 struct brcmf_pub *drvr = p2p->cfg->pub; 2148 struct brcmf_cfg80211_vif *p2p_vif; 2149 struct brcmf_if *p2p_ifp; 2150 struct brcmf_if *pri_ifp; 2151 int err; 2152 u32 bsscfgidx; 2153 2154 if (p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif) 2155 return ERR_PTR(-ENOSPC); 2156 2157 p2p_vif = brcmf_alloc_vif(p2p->cfg, NL80211_IFTYPE_P2P_DEVICE); 2158 if (IS_ERR(p2p_vif)) { 2159 bphy_err(drvr, "could not create discovery vif\n"); 2160 return (struct wireless_dev *)p2p_vif; 2161 } 2162 2163 pri_ifp = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->ifp; 2164 2165 /* firmware requires unique mac address for p2pdev interface */ 2166 if (addr && ether_addr_equal(addr, pri_ifp->mac_addr)) { 2167 bphy_err(drvr, "discovery vif must be different from primary interface\n"); 2168 err = -EINVAL; 2169 goto fail; 2170 } 2171 2172 brcmf_p2p_generate_bss_mac(p2p, addr); 2173 brcmf_p2p_set_firmware(pri_ifp, p2p->dev_addr); 2174 2175 brcmf_cfg80211_arm_vif_event(p2p->cfg, p2p_vif); 2176 brcmf_fweh_p2pdev_setup(pri_ifp, true); 2177 2178 /* Initialize P2P Discovery in the firmware */ 2179 err = brcmf_fil_iovar_int_set(pri_ifp, "p2p_disc", 1); 2180 if (err < 0) { 2181 bphy_err(drvr, "set p2p_disc error\n"); 2182 brcmf_fweh_p2pdev_setup(pri_ifp, false); 2183 brcmf_cfg80211_arm_vif_event(p2p->cfg, NULL); 2184 goto fail; 2185 } 2186 2187 /* wait for firmware event */ 2188 err = brcmf_cfg80211_wait_vif_event(p2p->cfg, BRCMF_E_IF_ADD, 2189 BRCMF_VIF_EVENT_TIMEOUT); 2190 brcmf_cfg80211_arm_vif_event(p2p->cfg, NULL); 2191 brcmf_fweh_p2pdev_setup(pri_ifp, false); 2192 if (!err) { 2193 bphy_err(drvr, "timeout occurred\n"); 2194 err = -EIO; 2195 goto fail; 2196 } 2197 2198 /* discovery interface created */ 2199 p2p_ifp = p2p_vif->ifp; 2200 p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif = p2p_vif; 2201 memcpy(p2p_ifp->mac_addr, p2p->dev_addr, ETH_ALEN); 2202 memcpy(&p2p_vif->wdev.address, p2p->dev_addr, sizeof(p2p->dev_addr)); 2203 2204 /* verify bsscfg index for P2P discovery */ 2205 err = brcmf_fil_iovar_int_get(pri_ifp, "p2p_dev", &bsscfgidx); 2206 if (err < 0) { 2207 bphy_err(drvr, "retrieving discover bsscfg index failed\n"); 2208 goto fail; 2209 } 2210 2211 WARN_ON(p2p_ifp->bsscfgidx != bsscfgidx); 2212 2213 INIT_WORK(&p2p->afx_hdl.afx_work, brcmf_p2p_afx_handler); 2214 init_completion(&p2p->afx_hdl.act_frm_scan); 2215 init_completion(&p2p->wait_next_af); 2216 2217 return &p2p_vif->wdev; 2218 2219 fail: 2220 brcmf_free_vif(p2p_vif); 2221 return ERR_PTR(err); 2222 } 2223 2224 static int brcmf_p2p_get_conn_idx(struct brcmf_cfg80211_info *cfg) 2225 { 2226 int i; 2227 struct brcmf_if *ifp = netdev_priv(cfg_to_ndev(cfg)); 2228 2229 if (!ifp) 2230 return -ENODEV; 2231 2232 for (i = P2PAPI_BSSCFG_CONNECTION; i < P2PAPI_BSSCFG_MAX; i++) { 2233 if (!cfg->p2p.bss_idx[i].vif) { 2234 if (i == P2PAPI_BSSCFG_CONNECTION2 && 2235 !(brcmf_feat_is_enabled(ifp, BRCMF_FEAT_RSDB))) { 2236 brcmf_err("Multi p2p not supported"); 2237 return -EIO; 2238 } 2239 return i; 2240 } 2241 } 2242 return -EIO; 2243 } 2244 2245 /** 2246 * brcmf_p2p_add_vif() - create a new P2P virtual interface. 2247 * 2248 * @wiphy: wiphy device of new interface. 2249 * @name: name of the new interface. 2250 * @name_assign_type: origin of the interface name 2251 * @type: nl80211 interface type. 2252 * @params: contains mac address for P2P device. 2253 */ 2254 struct wireless_dev *brcmf_p2p_add_vif(struct wiphy *wiphy, const char *name, 2255 unsigned char name_assign_type, 2256 enum nl80211_iftype type, 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_pub *drvr = cfg->pub; 2262 struct brcmf_cfg80211_vif *vif; 2263 enum brcmf_fil_p2p_if_types iftype; 2264 int err = 0; 2265 int connidx; 2266 u8 *p2p_intf_addr; 2267 2268 if (brcmf_cfg80211_vif_event_armed(cfg)) 2269 return ERR_PTR(-EBUSY); 2270 2271 brcmf_dbg(INFO, "adding vif \"%s\" (type=%d)\n", name, type); 2272 2273 switch (type) { 2274 case NL80211_IFTYPE_P2P_CLIENT: 2275 iftype = BRCMF_FIL_P2P_IF_CLIENT; 2276 break; 2277 case NL80211_IFTYPE_P2P_GO: 2278 iftype = BRCMF_FIL_P2P_IF_GO; 2279 break; 2280 case NL80211_IFTYPE_P2P_DEVICE: 2281 return brcmf_p2p_create_p2pdev(&cfg->p2p, wiphy, 2282 params->macaddr); 2283 default: 2284 return ERR_PTR(-EOPNOTSUPP); 2285 } 2286 2287 vif = brcmf_alloc_vif(cfg, type); 2288 if (IS_ERR(vif)) 2289 return (struct wireless_dev *)vif; 2290 brcmf_cfg80211_arm_vif_event(cfg, vif); 2291 2292 connidx = brcmf_p2p_get_conn_idx(cfg); 2293 2294 if (connidx == P2PAPI_BSSCFG_CONNECTION) 2295 p2p_intf_addr = cfg->p2p.conn_int_addr; 2296 else if (connidx == P2PAPI_BSSCFG_CONNECTION2) 2297 p2p_intf_addr = cfg->p2p.conn2_int_addr; 2298 else 2299 err = -EINVAL; 2300 2301 if (!err) 2302 err = brcmf_p2p_request_p2p_if(&cfg->p2p, ifp, 2303 p2p_intf_addr, iftype); 2304 2305 if (err) { 2306 brcmf_err("request p2p interface failed\n"); 2307 brcmf_cfg80211_arm_vif_event(cfg, NULL); 2308 goto fail; 2309 } 2310 2311 /* wait for firmware event */ 2312 err = brcmf_cfg80211_wait_vif_event(cfg, BRCMF_E_IF_ADD, 2313 BRCMF_VIF_EVENT_TIMEOUT); 2314 brcmf_cfg80211_arm_vif_event(cfg, NULL); 2315 if (!err) { 2316 bphy_err(drvr, "timeout occurred\n"); 2317 err = -EIO; 2318 goto fail; 2319 } 2320 2321 /* interface created in firmware */ 2322 ifp = vif->ifp; 2323 if (!ifp) { 2324 bphy_err(drvr, "no if pointer provided\n"); 2325 err = -ENOENT; 2326 goto fail; 2327 } 2328 2329 strscpy(ifp->ndev->name, name, sizeof(ifp->ndev->name)); 2330 ifp->ndev->name_assign_type = name_assign_type; 2331 err = brcmf_net_attach(ifp, true); 2332 if (err) { 2333 bphy_err(drvr, "Registering netdevice failed\n"); 2334 free_netdev(ifp->ndev); 2335 goto fail; 2336 } 2337 2338 cfg->p2p.bss_idx[connidx].vif = vif; 2339 /* Disable firmware roaming for P2P interface */ 2340 brcmf_fil_iovar_int_set(ifp, "roam_off", 1); 2341 if (iftype == BRCMF_FIL_P2P_IF_GO) { 2342 /* set station timeout for p2p */ 2343 brcmf_fil_cmd_int_set(ifp, BRCMF_C_SET_SCB_TIMEOUT, 2344 BRCMF_SCB_TIMEOUT_VALUE); 2345 } 2346 return &ifp->vif->wdev; 2347 2348 fail: 2349 brcmf_free_vif(vif); 2350 return ERR_PTR(err); 2351 } 2352 2353 /** 2354 * brcmf_p2p_del_vif() - delete a P2P virtual interface. 2355 * 2356 * @wiphy: wiphy device of interface. 2357 * @wdev: wireless device of interface. 2358 */ 2359 int brcmf_p2p_del_vif(struct wiphy *wiphy, struct wireless_dev *wdev) 2360 { 2361 struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy); 2362 struct brcmf_p2p_info *p2p = &cfg->p2p; 2363 struct brcmf_cfg80211_vif *vif; 2364 enum nl80211_iftype iftype; 2365 bool wait_for_disable = false; 2366 int err; 2367 2368 brcmf_dbg(TRACE, "delete P2P vif\n"); 2369 vif = container_of(wdev, struct brcmf_cfg80211_vif, wdev); 2370 2371 iftype = vif->wdev.iftype; 2372 brcmf_cfg80211_arm_vif_event(cfg, vif); 2373 switch (iftype) { 2374 case NL80211_IFTYPE_P2P_CLIENT: 2375 if (test_bit(BRCMF_VIF_STATUS_DISCONNECTING, &vif->sme_state)) 2376 wait_for_disable = true; 2377 break; 2378 2379 case NL80211_IFTYPE_P2P_GO: 2380 if (!brcmf_p2p_disable_p2p_if(vif)) 2381 wait_for_disable = true; 2382 break; 2383 2384 case NL80211_IFTYPE_P2P_DEVICE: 2385 if (!p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif) 2386 return 0; 2387 brcmf_p2p_cancel_remain_on_channel(vif->ifp); 2388 brcmf_p2p_deinit_discovery(p2p); 2389 break; 2390 2391 default: 2392 return -ENOTSUPP; 2393 } 2394 2395 clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status); 2396 brcmf_dbg(INFO, "P2P: GO_NEG_PHASE status cleared\n"); 2397 2398 if (wait_for_disable) 2399 wait_for_completion_timeout(&cfg->vif_disabled, 2400 BRCMF_P2P_DISABLE_TIMEOUT); 2401 2402 err = 0; 2403 if (iftype != NL80211_IFTYPE_P2P_DEVICE) { 2404 brcmf_vif_clear_mgmt_ies(vif); 2405 err = brcmf_p2p_release_p2p_if(vif); 2406 } 2407 if (!err) { 2408 /* wait for firmware event */ 2409 err = brcmf_cfg80211_wait_vif_event(cfg, BRCMF_E_IF_DEL, 2410 BRCMF_VIF_EVENT_TIMEOUT); 2411 if (!err) 2412 err = -EIO; 2413 else 2414 err = 0; 2415 } 2416 brcmf_remove_interface(vif->ifp, true); 2417 2418 brcmf_cfg80211_arm_vif_event(cfg, NULL); 2419 if (iftype != NL80211_IFTYPE_P2P_DEVICE) { 2420 if (vif == p2p->bss_idx[P2PAPI_BSSCFG_CONNECTION].vif) 2421 p2p->bss_idx[P2PAPI_BSSCFG_CONNECTION].vif = NULL; 2422 if (vif == p2p->bss_idx[P2PAPI_BSSCFG_CONNECTION2].vif) 2423 p2p->bss_idx[P2PAPI_BSSCFG_CONNECTION2].vif = NULL; 2424 } 2425 2426 return err; 2427 } 2428 2429 void brcmf_p2p_ifp_removed(struct brcmf_if *ifp, bool locked) 2430 { 2431 struct brcmf_cfg80211_info *cfg; 2432 struct brcmf_cfg80211_vif *vif; 2433 2434 brcmf_dbg(INFO, "P2P: device interface removed\n"); 2435 vif = ifp->vif; 2436 cfg = wdev_to_cfg(&vif->wdev); 2437 cfg->p2p.bss_idx[P2PAPI_BSSCFG_DEVICE].vif = NULL; 2438 if (!locked) { 2439 rtnl_lock(); 2440 wiphy_lock(cfg->wiphy); 2441 cfg80211_unregister_wdev(&vif->wdev); 2442 wiphy_unlock(cfg->wiphy); 2443 rtnl_unlock(); 2444 } else { 2445 cfg80211_unregister_wdev(&vif->wdev); 2446 } 2447 brcmf_free_vif(vif); 2448 } 2449 2450 int brcmf_p2p_start_device(struct wiphy *wiphy, struct wireless_dev *wdev) 2451 { 2452 struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy); 2453 struct brcmf_p2p_info *p2p = &cfg->p2p; 2454 struct brcmf_cfg80211_vif *vif; 2455 int err; 2456 2457 vif = container_of(wdev, struct brcmf_cfg80211_vif, wdev); 2458 mutex_lock(&cfg->usr_sync); 2459 err = brcmf_p2p_enable_discovery(p2p); 2460 if (!err) 2461 set_bit(BRCMF_VIF_STATUS_READY, &vif->sme_state); 2462 mutex_unlock(&cfg->usr_sync); 2463 return err; 2464 } 2465 2466 void brcmf_p2p_stop_device(struct wiphy *wiphy, struct wireless_dev *wdev) 2467 { 2468 struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy); 2469 struct brcmf_p2p_info *p2p = &cfg->p2p; 2470 struct brcmf_cfg80211_vif *vif; 2471 2472 vif = container_of(wdev, struct brcmf_cfg80211_vif, wdev); 2473 /* This call can be result of the unregister_wdev call. In that case 2474 * we dont want to do anything anymore. Just return. The config vif 2475 * will have been cleared at this point. 2476 */ 2477 if (p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif == vif) { 2478 mutex_lock(&cfg->usr_sync); 2479 /* Set the discovery state to SCAN */ 2480 (void)brcmf_p2p_set_discover_state(vif->ifp, 2481 WL_P2P_DISC_ST_SCAN, 0, 0); 2482 brcmf_abort_scanning(cfg); 2483 clear_bit(BRCMF_VIF_STATUS_READY, &vif->sme_state); 2484 mutex_unlock(&cfg->usr_sync); 2485 } 2486 } 2487 2488 /** 2489 * brcmf_p2p_attach() - attach for P2P. 2490 * 2491 * @cfg: driver private data for cfg80211 interface. 2492 * @p2pdev_forced: create p2p device interface at attach. 2493 */ 2494 s32 brcmf_p2p_attach(struct brcmf_cfg80211_info *cfg, bool p2pdev_forced) 2495 { 2496 struct brcmf_pub *drvr = cfg->pub; 2497 struct brcmf_p2p_info *p2p; 2498 struct brcmf_if *pri_ifp; 2499 s32 err = 0; 2500 void *err_ptr; 2501 2502 p2p = &cfg->p2p; 2503 p2p->cfg = cfg; 2504 2505 pri_ifp = brcmf_get_ifp(cfg->pub, 0); 2506 p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif = pri_ifp->vif; 2507 2508 init_completion(&p2p->send_af_done); 2509 2510 if (p2pdev_forced) { 2511 err_ptr = brcmf_p2p_create_p2pdev(p2p, NULL, NULL); 2512 if (IS_ERR(err_ptr)) { 2513 bphy_err(drvr, "P2P device creation failed.\n"); 2514 err = PTR_ERR(err_ptr); 2515 } 2516 } else { 2517 p2p->p2pdev_dynamically = true; 2518 } 2519 return err; 2520 } 2521 2522 /** 2523 * brcmf_p2p_detach() - detach P2P. 2524 * 2525 * @p2p: P2P specific data. 2526 */ 2527 void brcmf_p2p_detach(struct brcmf_p2p_info *p2p) 2528 { 2529 struct brcmf_cfg80211_vif *vif; 2530 2531 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif; 2532 if (vif != NULL) { 2533 brcmf_p2p_cancel_remain_on_channel(vif->ifp); 2534 brcmf_p2p_deinit_discovery(p2p); 2535 brcmf_remove_interface(vif->ifp, false); 2536 } 2537 /* just set it all to zero */ 2538 memset(p2p, 0, sizeof(*p2p)); 2539 } 2540 2541