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 */ 974 int brcmf_p2p_remain_on_channel(struct wiphy *wiphy, struct wireless_dev *wdev, 975 struct ieee80211_channel *channel, 976 unsigned int duration, u64 *cookie) 977 { 978 struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy); 979 struct brcmf_p2p_info *p2p = &cfg->p2p; 980 s32 err; 981 u16 channel_nr; 982 983 channel_nr = ieee80211_frequency_to_channel(channel->center_freq); 984 brcmf_dbg(TRACE, "Enter, channel: %d, duration ms (%d)\n", channel_nr, 985 duration); 986 987 err = brcmf_p2p_enable_discovery(p2p); 988 if (err) 989 goto exit; 990 err = brcmf_p2p_discover_listen(p2p, channel_nr, duration); 991 if (err) 992 goto exit; 993 994 memcpy(&p2p->remain_on_channel, channel, sizeof(*channel)); 995 *cookie = p2p->remain_on_channel_cookie; 996 cfg80211_ready_on_channel(wdev, *cookie, channel, duration, GFP_KERNEL); 997 998 exit: 999 return err; 1000 } 1001 1002 1003 /** 1004 * brcmf_p2p_notify_listen_complete() - p2p listen has completed. 1005 * 1006 * @ifp: interfac control. 1007 * @e: event message. Not used, to make it usable for fweh event dispatcher. 1008 * @data: payload of message. Not used. 1009 * 1010 */ 1011 int brcmf_p2p_notify_listen_complete(struct brcmf_if *ifp, 1012 const struct brcmf_event_msg *e, 1013 void *data) 1014 { 1015 struct brcmf_cfg80211_info *cfg = ifp->drvr->config; 1016 struct brcmf_p2p_info *p2p = &cfg->p2p; 1017 1018 brcmf_dbg(TRACE, "Enter\n"); 1019 if (test_and_clear_bit(BRCMF_P2P_STATUS_DISCOVER_LISTEN, 1020 &p2p->status)) { 1021 if (test_and_clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_AF_LISTEN, 1022 &p2p->status)) { 1023 clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, 1024 &p2p->status); 1025 brcmf_dbg(INFO, "Listen DONE, wake up wait_next_af\n"); 1026 complete(&p2p->wait_next_af); 1027 } 1028 1029 cfg80211_remain_on_channel_expired(&ifp->vif->wdev, 1030 p2p->remain_on_channel_cookie, 1031 &p2p->remain_on_channel, 1032 GFP_KERNEL); 1033 } 1034 return 0; 1035 } 1036 1037 1038 /** 1039 * brcmf_p2p_cancel_remain_on_channel() - cancel p2p listen state. 1040 * 1041 * @ifp: interfac control. 1042 * 1043 */ 1044 void brcmf_p2p_cancel_remain_on_channel(struct brcmf_if *ifp) 1045 { 1046 if (!ifp) 1047 return; 1048 brcmf_p2p_set_discover_state(ifp, WL_P2P_DISC_ST_SCAN, 0, 0); 1049 brcmf_p2p_notify_listen_complete(ifp, NULL, NULL); 1050 } 1051 1052 1053 /** 1054 * brcmf_p2p_act_frm_search() - search function for action frame. 1055 * 1056 * @p2p: p2p device. 1057 * @channel: channel on which action frame is to be trasmitted. 1058 * 1059 * search function to reach at common channel to send action frame. When 1060 * channel is 0 then all social channels will be used to send af 1061 */ 1062 static s32 brcmf_p2p_act_frm_search(struct brcmf_p2p_info *p2p, u16 channel) 1063 { 1064 struct brcmf_pub *drvr = p2p->cfg->pub; 1065 s32 err; 1066 u32 channel_cnt; 1067 u16 *default_chan_list; 1068 u32 i; 1069 struct brcmu_chan ch; 1070 1071 brcmf_dbg(TRACE, "Enter\n"); 1072 1073 if (channel) 1074 channel_cnt = AF_PEER_SEARCH_CNT; 1075 else 1076 channel_cnt = SOCIAL_CHAN_CNT; 1077 default_chan_list = kcalloc(channel_cnt, sizeof(*default_chan_list), 1078 GFP_KERNEL); 1079 if (default_chan_list == NULL) { 1080 bphy_err(drvr, "channel list allocation failed\n"); 1081 err = -ENOMEM; 1082 goto exit; 1083 } 1084 ch.bw = BRCMU_CHAN_BW_20; 1085 if (channel) { 1086 ch.chnum = channel; 1087 p2p->cfg->d11inf.encchspec(&ch); 1088 /* insert same channel to the chan_list */ 1089 for (i = 0; i < channel_cnt; i++) 1090 default_chan_list[i] = ch.chspec; 1091 } else { 1092 ch.chnum = SOCIAL_CHAN_1; 1093 p2p->cfg->d11inf.encchspec(&ch); 1094 default_chan_list[0] = ch.chspec; 1095 ch.chnum = SOCIAL_CHAN_2; 1096 p2p->cfg->d11inf.encchspec(&ch); 1097 default_chan_list[1] = ch.chspec; 1098 ch.chnum = SOCIAL_CHAN_3; 1099 p2p->cfg->d11inf.encchspec(&ch); 1100 default_chan_list[2] = ch.chspec; 1101 } 1102 err = brcmf_p2p_escan(p2p, channel_cnt, default_chan_list, 1103 WL_P2P_DISC_ST_SEARCH, P2PAPI_BSSCFG_DEVICE); 1104 kfree(default_chan_list); 1105 exit: 1106 return err; 1107 } 1108 1109 1110 /** 1111 * brcmf_p2p_afx_handler() - afx worker thread. 1112 * 1113 * @work: 1114 * 1115 */ 1116 static void brcmf_p2p_afx_handler(struct work_struct *work) 1117 { 1118 struct afx_hdl *afx_hdl = container_of(work, struct afx_hdl, afx_work); 1119 struct brcmf_p2p_info *p2p = container_of(afx_hdl, 1120 struct brcmf_p2p_info, 1121 afx_hdl); 1122 struct brcmf_pub *drvr = p2p->cfg->pub; 1123 s32 err; 1124 1125 if (!afx_hdl->is_active) 1126 return; 1127 1128 if (afx_hdl->is_listen && afx_hdl->my_listen_chan) 1129 /* 100ms ~ 300ms */ 1130 err = brcmf_p2p_discover_listen(p2p, afx_hdl->my_listen_chan, 1131 100 * (1 + prandom_u32_max(3))); 1132 else 1133 err = brcmf_p2p_act_frm_search(p2p, afx_hdl->peer_listen_chan); 1134 1135 if (err) { 1136 bphy_err(drvr, "ERROR occurred! value is (%d)\n", err); 1137 if (test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, 1138 &p2p->status)) 1139 complete(&afx_hdl->act_frm_scan); 1140 } 1141 } 1142 1143 1144 /** 1145 * brcmf_p2p_af_searching_channel() - search channel. 1146 * 1147 * @p2p: p2p device info struct. 1148 * 1149 */ 1150 static s32 brcmf_p2p_af_searching_channel(struct brcmf_p2p_info *p2p) 1151 { 1152 struct afx_hdl *afx_hdl = &p2p->afx_hdl; 1153 struct brcmf_cfg80211_vif *pri_vif; 1154 s32 retry; 1155 1156 brcmf_dbg(TRACE, "Enter\n"); 1157 1158 pri_vif = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif; 1159 1160 reinit_completion(&afx_hdl->act_frm_scan); 1161 set_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status); 1162 afx_hdl->is_active = true; 1163 afx_hdl->peer_chan = P2P_INVALID_CHANNEL; 1164 1165 /* Loop to wait until we find a peer's channel or the 1166 * pending action frame tx is cancelled. 1167 */ 1168 retry = 0; 1169 while ((retry < P2P_CHANNEL_SYNC_RETRY) && 1170 (afx_hdl->peer_chan == P2P_INVALID_CHANNEL)) { 1171 afx_hdl->is_listen = false; 1172 brcmf_dbg(TRACE, "Scheduling action frame for sending.. (%d)\n", 1173 retry); 1174 /* search peer on peer's listen channel */ 1175 schedule_work(&afx_hdl->afx_work); 1176 wait_for_completion_timeout(&afx_hdl->act_frm_scan, 1177 P2P_AF_FRM_SCAN_MAX_WAIT); 1178 if ((afx_hdl->peer_chan != P2P_INVALID_CHANNEL) || 1179 (!test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, 1180 &p2p->status))) 1181 break; 1182 1183 if (afx_hdl->my_listen_chan) { 1184 brcmf_dbg(TRACE, "Scheduling listen peer, channel=%d\n", 1185 afx_hdl->my_listen_chan); 1186 /* listen on my listen channel */ 1187 afx_hdl->is_listen = true; 1188 schedule_work(&afx_hdl->afx_work); 1189 wait_for_completion_timeout(&afx_hdl->act_frm_scan, 1190 P2P_AF_FRM_SCAN_MAX_WAIT); 1191 } 1192 if ((afx_hdl->peer_chan != P2P_INVALID_CHANNEL) || 1193 (!test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, 1194 &p2p->status))) 1195 break; 1196 retry++; 1197 1198 /* if sta is connected or connecting, sleep for a while before 1199 * retry af tx or finding a peer 1200 */ 1201 if (test_bit(BRCMF_VIF_STATUS_CONNECTED, &pri_vif->sme_state) || 1202 test_bit(BRCMF_VIF_STATUS_CONNECTING, &pri_vif->sme_state)) 1203 msleep(P2P_DEFAULT_SLEEP_TIME_VSDB); 1204 } 1205 1206 brcmf_dbg(TRACE, "Completed search/listen peer_chan=%d\n", 1207 afx_hdl->peer_chan); 1208 afx_hdl->is_active = false; 1209 1210 clear_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status); 1211 1212 return afx_hdl->peer_chan; 1213 } 1214 1215 1216 /** 1217 * brcmf_p2p_scan_finding_common_channel() - was escan used for finding channel 1218 * 1219 * @cfg: common configuration struct. 1220 * @bi: bss info struct, result from scan. 1221 * 1222 */ 1223 bool brcmf_p2p_scan_finding_common_channel(struct brcmf_cfg80211_info *cfg, 1224 struct brcmf_bss_info_le *bi) 1225 1226 { 1227 struct brcmf_p2p_info *p2p = &cfg->p2p; 1228 struct afx_hdl *afx_hdl = &p2p->afx_hdl; 1229 struct brcmu_chan ch; 1230 u8 *ie; 1231 s32 err; 1232 u8 p2p_dev_addr[ETH_ALEN]; 1233 1234 if (!test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status)) 1235 return false; 1236 1237 if (bi == NULL) { 1238 brcmf_dbg(TRACE, "ACTION FRAME SCAN Done\n"); 1239 if (afx_hdl->peer_chan == P2P_INVALID_CHANNEL) 1240 complete(&afx_hdl->act_frm_scan); 1241 return true; 1242 } 1243 1244 ie = ((u8 *)bi) + le16_to_cpu(bi->ie_offset); 1245 memset(p2p_dev_addr, 0, sizeof(p2p_dev_addr)); 1246 err = cfg80211_get_p2p_attr(ie, le32_to_cpu(bi->ie_length), 1247 IEEE80211_P2P_ATTR_DEVICE_INFO, 1248 p2p_dev_addr, sizeof(p2p_dev_addr)); 1249 if (err < 0) 1250 err = cfg80211_get_p2p_attr(ie, le32_to_cpu(bi->ie_length), 1251 IEEE80211_P2P_ATTR_DEVICE_ID, 1252 p2p_dev_addr, sizeof(p2p_dev_addr)); 1253 if ((err >= 0) && 1254 (ether_addr_equal(p2p_dev_addr, afx_hdl->tx_dst_addr))) { 1255 if (!bi->ctl_ch) { 1256 ch.chspec = le16_to_cpu(bi->chanspec); 1257 cfg->d11inf.decchspec(&ch); 1258 bi->ctl_ch = ch.control_ch_num; 1259 } 1260 afx_hdl->peer_chan = bi->ctl_ch; 1261 brcmf_dbg(TRACE, "ACTION FRAME SCAN : Peer %pM found, channel : %d\n", 1262 afx_hdl->tx_dst_addr, afx_hdl->peer_chan); 1263 complete(&afx_hdl->act_frm_scan); 1264 } 1265 return true; 1266 } 1267 1268 /** 1269 * brcmf_p2p_abort_action_frame() - abort action frame. 1270 * 1271 * @cfg: common configuration struct. 1272 * 1273 */ 1274 static s32 brcmf_p2p_abort_action_frame(struct brcmf_cfg80211_info *cfg) 1275 { 1276 struct brcmf_p2p_info *p2p = &cfg->p2p; 1277 struct brcmf_cfg80211_vif *vif; 1278 s32 err; 1279 s32 int_val = 1; 1280 1281 brcmf_dbg(TRACE, "Enter\n"); 1282 1283 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif; 1284 err = brcmf_fil_bsscfg_data_set(vif->ifp, "actframe_abort", &int_val, 1285 sizeof(s32)); 1286 if (err) 1287 brcmf_err(" aborting action frame has failed (%d)\n", err); 1288 1289 return err; 1290 } 1291 1292 /** 1293 * brcmf_p2p_stop_wait_next_action_frame() - finish scan if af tx complete. 1294 * 1295 * @cfg: common configuration struct. 1296 * 1297 */ 1298 static void 1299 brcmf_p2p_stop_wait_next_action_frame(struct brcmf_cfg80211_info *cfg) 1300 { 1301 struct brcmf_p2p_info *p2p = &cfg->p2p; 1302 struct brcmf_if *ifp = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->ifp; 1303 s32 err; 1304 1305 if (test_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status) && 1306 (test_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status) || 1307 test_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status))) { 1308 brcmf_dbg(TRACE, "*** Wake UP ** abort actframe iovar\n"); 1309 /* if channel is not zero, "actfame" uses off channel scan. 1310 * So abort scan for off channel completion. 1311 */ 1312 if (p2p->af_sent_channel) { 1313 /* abort actframe using actframe_abort or abort scan */ 1314 err = brcmf_p2p_abort_action_frame(cfg); 1315 if (err) 1316 brcmf_notify_escan_complete(cfg, ifp, true, 1317 true); 1318 } 1319 } else if (test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_AF_LISTEN, 1320 &p2p->status)) { 1321 brcmf_dbg(TRACE, "*** Wake UP ** abort listen for next af frame\n"); 1322 /* So abort scan to cancel listen */ 1323 brcmf_notify_escan_complete(cfg, ifp, true, true); 1324 } 1325 } 1326 1327 1328 /** 1329 * brcmf_p2p_gon_req_collision() - Check if go negotiaton collission 1330 * 1331 * @p2p: p2p device info struct. 1332 * @mac: MAC address. 1333 * 1334 * return true if recevied action frame is to be dropped. 1335 */ 1336 static bool 1337 brcmf_p2p_gon_req_collision(struct brcmf_p2p_info *p2p, u8 *mac) 1338 { 1339 struct brcmf_cfg80211_info *cfg = p2p->cfg; 1340 struct brcmf_if *ifp; 1341 1342 brcmf_dbg(TRACE, "Enter\n"); 1343 1344 if (!test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status) || 1345 !p2p->gon_req_action) 1346 return false; 1347 1348 brcmf_dbg(TRACE, "GO Negotiation Request COLLISION !!!\n"); 1349 /* if sa(peer) addr is less than da(my) addr, then this device 1350 * process peer's gon request and block to send gon req. 1351 * if not (sa addr > da addr), 1352 * this device will process gon request and drop gon req of peer. 1353 */ 1354 ifp = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif->ifp; 1355 if (memcmp(mac, ifp->mac_addr, ETH_ALEN) < 0) { 1356 brcmf_dbg(INFO, "Block transmit gon req !!!\n"); 1357 p2p->block_gon_req_tx = true; 1358 /* if we are finding a common channel for sending af, 1359 * do not scan more to block to send current gon req 1360 */ 1361 if (test_and_clear_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, 1362 &p2p->status)) 1363 complete(&p2p->afx_hdl.act_frm_scan); 1364 if (test_and_clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, 1365 &p2p->status)) 1366 brcmf_p2p_stop_wait_next_action_frame(cfg); 1367 return false; 1368 } 1369 1370 /* drop gon request of peer to process gon request by this device. */ 1371 brcmf_dbg(INFO, "Drop received gon req !!!\n"); 1372 1373 return true; 1374 } 1375 1376 1377 /** 1378 * brcmf_p2p_notify_action_frame_rx() - received action frame. 1379 * 1380 * @ifp: interfac control. 1381 * @e: event message. Not used, to make it usable for fweh event dispatcher. 1382 * @data: payload of message, containing action frame data. 1383 * 1384 */ 1385 int brcmf_p2p_notify_action_frame_rx(struct brcmf_if *ifp, 1386 const struct brcmf_event_msg *e, 1387 void *data) 1388 { 1389 struct brcmf_pub *drvr = ifp->drvr; 1390 struct brcmf_cfg80211_info *cfg = drvr->config; 1391 struct brcmf_p2p_info *p2p = &cfg->p2p; 1392 struct afx_hdl *afx_hdl = &p2p->afx_hdl; 1393 struct wireless_dev *wdev; 1394 u32 mgmt_frame_len = e->datalen - sizeof(struct brcmf_rx_mgmt_data); 1395 struct brcmf_rx_mgmt_data *rxframe = (struct brcmf_rx_mgmt_data *)data; 1396 u8 *frame = (u8 *)(rxframe + 1); 1397 struct brcmf_p2p_pub_act_frame *act_frm; 1398 struct brcmf_p2psd_gas_pub_act_frame *sd_act_frm; 1399 struct brcmu_chan ch; 1400 struct ieee80211_mgmt *mgmt_frame; 1401 s32 freq; 1402 u16 mgmt_type; 1403 u8 action; 1404 1405 if (e->datalen < sizeof(*rxframe)) { 1406 brcmf_dbg(SCAN, "Event data to small. Ignore\n"); 1407 return 0; 1408 } 1409 1410 ch.chspec = be16_to_cpu(rxframe->chanspec); 1411 cfg->d11inf.decchspec(&ch); 1412 /* Check if wpa_supplicant has registered for this frame */ 1413 brcmf_dbg(INFO, "ifp->vif->mgmt_rx_reg %04x\n", ifp->vif->mgmt_rx_reg); 1414 mgmt_type = (IEEE80211_STYPE_ACTION & IEEE80211_FCTL_STYPE) >> 4; 1415 if ((ifp->vif->mgmt_rx_reg & BIT(mgmt_type)) == 0) 1416 return 0; 1417 1418 brcmf_p2p_print_actframe(false, frame, mgmt_frame_len); 1419 1420 action = P2P_PAF_SUBTYPE_INVALID; 1421 if (brcmf_p2p_is_pub_action(frame, mgmt_frame_len)) { 1422 act_frm = (struct brcmf_p2p_pub_act_frame *)frame; 1423 action = act_frm->subtype; 1424 if ((action == P2P_PAF_GON_REQ) && 1425 (brcmf_p2p_gon_req_collision(p2p, (u8 *)e->addr))) { 1426 if (test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, 1427 &p2p->status) && 1428 (ether_addr_equal(afx_hdl->tx_dst_addr, e->addr))) { 1429 afx_hdl->peer_chan = ch.control_ch_num; 1430 brcmf_dbg(INFO, "GON request: Peer found, channel=%d\n", 1431 afx_hdl->peer_chan); 1432 complete(&afx_hdl->act_frm_scan); 1433 } 1434 return 0; 1435 } 1436 /* After complete GO Negotiation, roll back to mpc mode */ 1437 if ((action == P2P_PAF_GON_CONF) || 1438 (action == P2P_PAF_PROVDIS_RSP)) 1439 brcmf_set_mpc(ifp, 1); 1440 if (action == P2P_PAF_GON_CONF) { 1441 brcmf_dbg(TRACE, "P2P: GO_NEG_PHASE status cleared\n"); 1442 clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status); 1443 } 1444 } else if (brcmf_p2p_is_gas_action(frame, mgmt_frame_len)) { 1445 sd_act_frm = (struct brcmf_p2psd_gas_pub_act_frame *)frame; 1446 action = sd_act_frm->action; 1447 } 1448 1449 if (test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status) && 1450 (p2p->next_af_subtype == action)) { 1451 brcmf_dbg(TRACE, "We got a right next frame! (%d)\n", action); 1452 clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, 1453 &p2p->status); 1454 /* Stop waiting for next AF. */ 1455 brcmf_p2p_stop_wait_next_action_frame(cfg); 1456 } 1457 1458 mgmt_frame = kzalloc(offsetof(struct ieee80211_mgmt, u) + 1459 mgmt_frame_len, GFP_KERNEL); 1460 if (!mgmt_frame) { 1461 bphy_err(drvr, "No memory available for action frame\n"); 1462 return -ENOMEM; 1463 } 1464 memcpy(mgmt_frame->da, ifp->mac_addr, ETH_ALEN); 1465 brcmf_fil_cmd_data_get(ifp, BRCMF_C_GET_BSSID, mgmt_frame->bssid, 1466 ETH_ALEN); 1467 memcpy(mgmt_frame->sa, e->addr, ETH_ALEN); 1468 mgmt_frame->frame_control = cpu_to_le16(IEEE80211_STYPE_ACTION); 1469 memcpy(&mgmt_frame->u, frame, mgmt_frame_len); 1470 mgmt_frame_len += offsetof(struct ieee80211_mgmt, u); 1471 1472 freq = ieee80211_channel_to_frequency(ch.control_ch_num, 1473 ch.band == BRCMU_CHAN_BAND_2G ? 1474 NL80211_BAND_2GHZ : 1475 NL80211_BAND_5GHZ); 1476 1477 wdev = &ifp->vif->wdev; 1478 cfg80211_rx_mgmt(wdev, freq, 0, (u8 *)mgmt_frame, mgmt_frame_len, 0); 1479 1480 kfree(mgmt_frame); 1481 return 0; 1482 } 1483 1484 1485 /** 1486 * brcmf_p2p_notify_action_tx_complete() - transmit action frame complete 1487 * 1488 * @ifp: interfac control. 1489 * @e: event message. Not used, to make it usable for fweh event dispatcher. 1490 * @data: not used. 1491 * 1492 */ 1493 int brcmf_p2p_notify_action_tx_complete(struct brcmf_if *ifp, 1494 const struct brcmf_event_msg *e, 1495 void *data) 1496 { 1497 struct brcmf_cfg80211_info *cfg = ifp->drvr->config; 1498 struct brcmf_p2p_info *p2p = &cfg->p2p; 1499 1500 brcmf_dbg(INFO, "Enter: event %s, status=%d\n", 1501 e->event_code == BRCMF_E_ACTION_FRAME_OFF_CHAN_COMPLETE ? 1502 "ACTION_FRAME_OFF_CHAN_COMPLETE" : "ACTION_FRAME_COMPLETE", 1503 e->status); 1504 1505 if (!test_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status)) 1506 return 0; 1507 1508 if (e->event_code == BRCMF_E_ACTION_FRAME_COMPLETE) { 1509 if (e->status == BRCMF_E_STATUS_SUCCESS) { 1510 set_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, 1511 &p2p->status); 1512 if (!p2p->wait_for_offchan_complete) 1513 complete(&p2p->send_af_done); 1514 } else { 1515 set_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status); 1516 /* If there is no ack, we don't need to wait for 1517 * WLC_E_ACTION_FRAME_OFFCHAN_COMPLETE event 1518 */ 1519 brcmf_p2p_stop_wait_next_action_frame(cfg); 1520 } 1521 1522 } else { 1523 complete(&p2p->send_af_done); 1524 } 1525 return 0; 1526 } 1527 1528 1529 /** 1530 * brcmf_p2p_tx_action_frame() - send action frame over fil. 1531 * 1532 * @p2p: p2p info struct for vif. 1533 * @af_params: action frame data/info. 1534 * 1535 * Send an action frame immediately without doing channel synchronization. 1536 * 1537 * This function waits for a completion event before returning. 1538 * The WLC_E_ACTION_FRAME_COMPLETE event will be received when the action 1539 * frame is transmitted. 1540 */ 1541 static s32 brcmf_p2p_tx_action_frame(struct brcmf_p2p_info *p2p, 1542 struct brcmf_fil_af_params_le *af_params) 1543 { 1544 struct brcmf_pub *drvr = p2p->cfg->pub; 1545 struct brcmf_cfg80211_vif *vif; 1546 struct brcmf_p2p_action_frame *p2p_af; 1547 s32 err = 0; 1548 1549 brcmf_dbg(TRACE, "Enter\n"); 1550 1551 reinit_completion(&p2p->send_af_done); 1552 clear_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status); 1553 clear_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status); 1554 1555 /* check if it is a p2p_presence response */ 1556 p2p_af = (struct brcmf_p2p_action_frame *)af_params->action_frame.data; 1557 if (p2p_af->subtype == P2P_AF_PRESENCE_RSP) 1558 vif = p2p->bss_idx[P2PAPI_BSSCFG_CONNECTION].vif; 1559 else 1560 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif; 1561 1562 err = brcmf_fil_bsscfg_data_set(vif->ifp, "actframe", af_params, 1563 sizeof(*af_params)); 1564 if (err) { 1565 bphy_err(drvr, " sending action frame has failed\n"); 1566 goto exit; 1567 } 1568 1569 p2p->af_sent_channel = le32_to_cpu(af_params->channel); 1570 p2p->af_tx_sent_jiffies = jiffies; 1571 1572 if (test_bit(BRCMF_P2P_STATUS_DISCOVER_LISTEN, &p2p->status) && 1573 p2p->af_sent_channel == 1574 ieee80211_frequency_to_channel(p2p->remain_on_channel.center_freq)) 1575 p2p->wait_for_offchan_complete = false; 1576 else 1577 p2p->wait_for_offchan_complete = true; 1578 1579 brcmf_dbg(TRACE, "Waiting for %s tx completion event\n", 1580 (p2p->wait_for_offchan_complete) ? 1581 "off-channel" : "on-channel"); 1582 1583 wait_for_completion_timeout(&p2p->send_af_done, P2P_AF_MAX_WAIT_TIME); 1584 1585 if (test_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status)) { 1586 brcmf_dbg(TRACE, "TX action frame operation is success\n"); 1587 } else { 1588 err = -EIO; 1589 brcmf_dbg(TRACE, "TX action frame operation has failed\n"); 1590 } 1591 /* clear status bit for action tx */ 1592 clear_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status); 1593 clear_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status); 1594 1595 exit: 1596 return err; 1597 } 1598 1599 1600 /** 1601 * brcmf_p2p_pub_af_tx() - public action frame tx routine. 1602 * 1603 * @cfg: driver private data for cfg80211 interface. 1604 * @af_params: action frame data/info. 1605 * @config_af_params: configuration data for action frame. 1606 * 1607 * routine which transmits ation frame public type. 1608 */ 1609 static s32 brcmf_p2p_pub_af_tx(struct brcmf_cfg80211_info *cfg, 1610 struct brcmf_fil_af_params_le *af_params, 1611 struct brcmf_config_af_params *config_af_params) 1612 { 1613 struct brcmf_p2p_info *p2p = &cfg->p2p; 1614 struct brcmf_pub *drvr = cfg->pub; 1615 struct brcmf_fil_action_frame_le *action_frame; 1616 struct brcmf_p2p_pub_act_frame *act_frm; 1617 s32 err = 0; 1618 u16 ie_len; 1619 1620 action_frame = &af_params->action_frame; 1621 act_frm = (struct brcmf_p2p_pub_act_frame *)(action_frame->data); 1622 1623 config_af_params->extra_listen = true; 1624 1625 switch (act_frm->subtype) { 1626 case P2P_PAF_GON_REQ: 1627 brcmf_dbg(TRACE, "P2P: GO_NEG_PHASE status set\n"); 1628 set_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status); 1629 config_af_params->mpc_onoff = 0; 1630 config_af_params->search_channel = true; 1631 p2p->next_af_subtype = act_frm->subtype + 1; 1632 p2p->gon_req_action = true; 1633 /* increase dwell time to wait for RESP frame */ 1634 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME); 1635 break; 1636 case P2P_PAF_GON_RSP: 1637 p2p->next_af_subtype = act_frm->subtype + 1; 1638 /* increase dwell time to wait for CONF frame */ 1639 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME); 1640 break; 1641 case P2P_PAF_GON_CONF: 1642 /* If we reached till GO Neg confirmation reset the filter */ 1643 brcmf_dbg(TRACE, "P2P: GO_NEG_PHASE status cleared\n"); 1644 clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status); 1645 /* turn on mpc again if go nego is done */ 1646 config_af_params->mpc_onoff = 1; 1647 /* minimize dwell time */ 1648 af_params->dwell_time = cpu_to_le32(P2P_AF_MIN_DWELL_TIME); 1649 config_af_params->extra_listen = false; 1650 break; 1651 case P2P_PAF_INVITE_REQ: 1652 config_af_params->search_channel = true; 1653 p2p->next_af_subtype = act_frm->subtype + 1; 1654 /* increase dwell time */ 1655 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME); 1656 break; 1657 case P2P_PAF_INVITE_RSP: 1658 /* minimize dwell time */ 1659 af_params->dwell_time = cpu_to_le32(P2P_AF_MIN_DWELL_TIME); 1660 config_af_params->extra_listen = false; 1661 break; 1662 case P2P_PAF_DEVDIS_REQ: 1663 config_af_params->search_channel = true; 1664 p2p->next_af_subtype = act_frm->subtype + 1; 1665 /* maximize dwell time to wait for RESP frame */ 1666 af_params->dwell_time = cpu_to_le32(P2P_AF_LONG_DWELL_TIME); 1667 break; 1668 case P2P_PAF_DEVDIS_RSP: 1669 /* minimize dwell time */ 1670 af_params->dwell_time = cpu_to_le32(P2P_AF_MIN_DWELL_TIME); 1671 config_af_params->extra_listen = false; 1672 break; 1673 case P2P_PAF_PROVDIS_REQ: 1674 ie_len = le16_to_cpu(action_frame->len) - 1675 offsetof(struct brcmf_p2p_pub_act_frame, elts); 1676 if (cfg80211_get_p2p_attr(&act_frm->elts[0], ie_len, 1677 IEEE80211_P2P_ATTR_GROUP_ID, 1678 NULL, 0) < 0) 1679 config_af_params->search_channel = true; 1680 config_af_params->mpc_onoff = 0; 1681 p2p->next_af_subtype = act_frm->subtype + 1; 1682 /* increase dwell time to wait for RESP frame */ 1683 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME); 1684 break; 1685 case P2P_PAF_PROVDIS_RSP: 1686 /* wpa_supplicant send go nego req right after prov disc */ 1687 p2p->next_af_subtype = P2P_PAF_GON_REQ; 1688 /* increase dwell time to MED level */ 1689 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME); 1690 config_af_params->extra_listen = false; 1691 break; 1692 default: 1693 bphy_err(drvr, "Unknown p2p pub act frame subtype: %d\n", 1694 act_frm->subtype); 1695 err = -EINVAL; 1696 } 1697 return err; 1698 } 1699 1700 static bool brcmf_p2p_check_dwell_overflow(u32 requested_dwell, 1701 unsigned long dwell_jiffies) 1702 { 1703 if ((requested_dwell & CUSTOM_RETRY_MASK) && 1704 (jiffies_to_msecs(jiffies - dwell_jiffies) > 1705 (requested_dwell & ~CUSTOM_RETRY_MASK))) { 1706 brcmf_err("Action frame TX retry time over dwell time!\n"); 1707 return true; 1708 } 1709 return false; 1710 } 1711 /** 1712 * brcmf_p2p_send_action_frame() - send action frame . 1713 * 1714 * @cfg: driver private data for cfg80211 interface. 1715 * @ndev: net device to transmit on. 1716 * @af_params: configuration data for action frame. 1717 */ 1718 bool brcmf_p2p_send_action_frame(struct brcmf_cfg80211_info *cfg, 1719 struct net_device *ndev, 1720 struct brcmf_fil_af_params_le *af_params) 1721 { 1722 struct brcmf_p2p_info *p2p = &cfg->p2p; 1723 struct brcmf_if *ifp = netdev_priv(ndev); 1724 struct brcmf_fil_action_frame_le *action_frame; 1725 struct brcmf_config_af_params config_af_params; 1726 struct afx_hdl *afx_hdl = &p2p->afx_hdl; 1727 struct brcmf_pub *drvr = cfg->pub; 1728 u16 action_frame_len; 1729 bool ack = false; 1730 u8 category; 1731 u8 action; 1732 s32 tx_retry; 1733 s32 extra_listen_time; 1734 uint delta_ms; 1735 unsigned long dwell_jiffies = 0; 1736 bool dwell_overflow = false; 1737 1738 u32 requested_dwell = le32_to_cpu(af_params->dwell_time); 1739 action_frame = &af_params->action_frame; 1740 action_frame_len = le16_to_cpu(action_frame->len); 1741 1742 brcmf_p2p_print_actframe(true, action_frame->data, action_frame_len); 1743 1744 /* Add the default dwell time. Dwell time to stay off-channel */ 1745 /* to wait for a response action frame after transmitting an */ 1746 /* GO Negotiation action frame */ 1747 af_params->dwell_time = cpu_to_le32(P2P_AF_DWELL_TIME); 1748 1749 category = action_frame->data[DOT11_ACTION_CAT_OFF]; 1750 action = action_frame->data[DOT11_ACTION_ACT_OFF]; 1751 1752 /* initialize variables */ 1753 p2p->next_af_subtype = P2P_PAF_SUBTYPE_INVALID; 1754 p2p->gon_req_action = false; 1755 1756 /* config parameters */ 1757 config_af_params.mpc_onoff = -1; 1758 config_af_params.search_channel = false; 1759 config_af_params.extra_listen = false; 1760 1761 if (brcmf_p2p_is_pub_action(action_frame->data, action_frame_len)) { 1762 /* p2p public action frame process */ 1763 if (brcmf_p2p_pub_af_tx(cfg, af_params, &config_af_params)) { 1764 /* Just send unknown subtype frame with */ 1765 /* default parameters. */ 1766 bphy_err(drvr, "P2P Public action frame, unknown subtype.\n"); 1767 } 1768 } else if (brcmf_p2p_is_gas_action(action_frame->data, 1769 action_frame_len)) { 1770 /* service discovery process */ 1771 if (action == P2PSD_ACTION_ID_GAS_IREQ || 1772 action == P2PSD_ACTION_ID_GAS_CREQ) { 1773 /* configure service discovery query frame */ 1774 config_af_params.search_channel = true; 1775 1776 /* save next af suptype to cancel */ 1777 /* remaining dwell time */ 1778 p2p->next_af_subtype = action + 1; 1779 1780 af_params->dwell_time = 1781 cpu_to_le32(P2P_AF_MED_DWELL_TIME); 1782 } else if (action == P2PSD_ACTION_ID_GAS_IRESP || 1783 action == P2PSD_ACTION_ID_GAS_CRESP) { 1784 /* configure service discovery response frame */ 1785 af_params->dwell_time = 1786 cpu_to_le32(P2P_AF_MIN_DWELL_TIME); 1787 } else { 1788 bphy_err(drvr, "Unknown action type: %d\n", action); 1789 goto exit; 1790 } 1791 } else if (brcmf_p2p_is_p2p_action(action_frame->data, 1792 action_frame_len)) { 1793 /* do not configure anything. it will be */ 1794 /* sent with a default configuration */ 1795 } else { 1796 bphy_err(drvr, "Unknown Frame: category 0x%x, action 0x%x\n", 1797 category, action); 1798 return false; 1799 } 1800 1801 /* if connecting on primary iface, sleep for a while before sending 1802 * af tx for VSDB 1803 */ 1804 if (test_bit(BRCMF_VIF_STATUS_CONNECTING, 1805 &p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->sme_state)) 1806 msleep(50); 1807 1808 /* if scan is ongoing, abort current scan. */ 1809 if (test_bit(BRCMF_SCAN_STATUS_BUSY, &cfg->scan_status)) 1810 brcmf_abort_scanning(cfg); 1811 1812 memcpy(afx_hdl->tx_dst_addr, action_frame->da, ETH_ALEN); 1813 1814 /* To make sure to send successfully action frame, turn off mpc */ 1815 if (config_af_params.mpc_onoff == 0) 1816 brcmf_set_mpc(ifp, 0); 1817 1818 /* set status and destination address before sending af */ 1819 if (p2p->next_af_subtype != P2P_PAF_SUBTYPE_INVALID) { 1820 /* set status to cancel the remained dwell time in rx process */ 1821 set_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status); 1822 } 1823 1824 p2p->af_sent_channel = 0; 1825 set_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status); 1826 /* validate channel and p2p ies */ 1827 if (config_af_params.search_channel && 1828 IS_P2P_SOCIAL_CHANNEL(le32_to_cpu(af_params->channel)) && 1829 p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif->saved_ie.probe_req_ie_len) { 1830 afx_hdl = &p2p->afx_hdl; 1831 afx_hdl->peer_listen_chan = le32_to_cpu(af_params->channel); 1832 1833 if (brcmf_p2p_af_searching_channel(p2p) == 1834 P2P_INVALID_CHANNEL) { 1835 bphy_err(drvr, "Couldn't find peer's channel.\n"); 1836 goto exit; 1837 } 1838 1839 /* Abort scan even for VSDB scenarios. Scan gets aborted in 1840 * firmware but after the check of piggyback algorithm. To take 1841 * care of current piggback algo, lets abort the scan here 1842 * itself. 1843 */ 1844 brcmf_notify_escan_complete(cfg, ifp, true, true); 1845 1846 /* update channel */ 1847 af_params->channel = cpu_to_le32(afx_hdl->peer_chan); 1848 } 1849 dwell_jiffies = jiffies; 1850 dwell_overflow = brcmf_p2p_check_dwell_overflow(requested_dwell, 1851 dwell_jiffies); 1852 1853 tx_retry = 0; 1854 while (!p2p->block_gon_req_tx && 1855 (!ack) && (tx_retry < P2P_AF_TX_MAX_RETRY) && 1856 !dwell_overflow) { 1857 if (af_params->channel) 1858 msleep(P2P_AF_RETRY_DELAY_TIME); 1859 1860 ack = !brcmf_p2p_tx_action_frame(p2p, af_params); 1861 tx_retry++; 1862 dwell_overflow = brcmf_p2p_check_dwell_overflow(requested_dwell, 1863 dwell_jiffies); 1864 } 1865 if (!ack) { 1866 bphy_err(drvr, "Failed to send Action Frame(retry %d)\n", 1867 tx_retry); 1868 clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status); 1869 } 1870 1871 exit: 1872 clear_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status); 1873 1874 /* WAR: sometimes dongle does not keep the dwell time of 'actframe'. 1875 * if we coundn't get the next action response frame and dongle does 1876 * not keep the dwell time, go to listen state again to get next action 1877 * response frame. 1878 */ 1879 if (ack && config_af_params.extra_listen && !p2p->block_gon_req_tx && 1880 test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status) && 1881 p2p->af_sent_channel == afx_hdl->my_listen_chan) { 1882 delta_ms = jiffies_to_msecs(jiffies - p2p->af_tx_sent_jiffies); 1883 if (le32_to_cpu(af_params->dwell_time) > delta_ms) 1884 extra_listen_time = le32_to_cpu(af_params->dwell_time) - 1885 delta_ms; 1886 else 1887 extra_listen_time = 0; 1888 if (extra_listen_time > 50) { 1889 set_bit(BRCMF_P2P_STATUS_WAITING_NEXT_AF_LISTEN, 1890 &p2p->status); 1891 brcmf_dbg(INFO, "Wait more time! actual af time:%d, calculated extra listen:%d\n", 1892 le32_to_cpu(af_params->dwell_time), 1893 extra_listen_time); 1894 extra_listen_time += 100; 1895 if (!brcmf_p2p_discover_listen(p2p, 1896 p2p->af_sent_channel, 1897 extra_listen_time)) { 1898 unsigned long duration; 1899 1900 extra_listen_time += 100; 1901 duration = msecs_to_jiffies(extra_listen_time); 1902 wait_for_completion_timeout(&p2p->wait_next_af, 1903 duration); 1904 } 1905 clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_AF_LISTEN, 1906 &p2p->status); 1907 } 1908 } 1909 1910 if (p2p->block_gon_req_tx) { 1911 /* if ack is true, supplicant will wait more time(100ms). 1912 * so we will return it as a success to get more time . 1913 */ 1914 p2p->block_gon_req_tx = false; 1915 ack = true; 1916 } 1917 1918 clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status); 1919 /* if all done, turn mpc on again */ 1920 if (config_af_params.mpc_onoff == 1) 1921 brcmf_set_mpc(ifp, 1); 1922 1923 return ack; 1924 } 1925 1926 /** 1927 * brcmf_p2p_notify_rx_mgmt_p2p_probereq() - Event handler for p2p probe req. 1928 * 1929 * @ifp: interface pointer for which event was received. 1930 * @e: even message. 1931 * @data: payload of event message (probe request). 1932 */ 1933 s32 brcmf_p2p_notify_rx_mgmt_p2p_probereq(struct brcmf_if *ifp, 1934 const struct brcmf_event_msg *e, 1935 void *data) 1936 { 1937 struct brcmf_cfg80211_info *cfg = ifp->drvr->config; 1938 struct brcmf_p2p_info *p2p = &cfg->p2p; 1939 struct afx_hdl *afx_hdl = &p2p->afx_hdl; 1940 struct brcmf_cfg80211_vif *vif = ifp->vif; 1941 struct brcmf_rx_mgmt_data *rxframe = (struct brcmf_rx_mgmt_data *)data; 1942 struct brcmu_chan ch; 1943 u8 *mgmt_frame; 1944 u32 mgmt_frame_len; 1945 s32 freq; 1946 u16 mgmt_type; 1947 1948 brcmf_dbg(INFO, "Enter: event %d reason %d\n", e->event_code, 1949 e->reason); 1950 1951 if (e->datalen < sizeof(*rxframe)) { 1952 brcmf_dbg(SCAN, "Event data to small. Ignore\n"); 1953 return 0; 1954 } 1955 1956 ch.chspec = be16_to_cpu(rxframe->chanspec); 1957 cfg->d11inf.decchspec(&ch); 1958 1959 if (test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status) && 1960 (ether_addr_equal(afx_hdl->tx_dst_addr, e->addr))) { 1961 afx_hdl->peer_chan = ch.control_ch_num; 1962 brcmf_dbg(INFO, "PROBE REQUEST: Peer found, channel=%d\n", 1963 afx_hdl->peer_chan); 1964 complete(&afx_hdl->act_frm_scan); 1965 } 1966 1967 /* Firmware sends us two proberesponses for each idx one. At the */ 1968 /* moment anything but bsscfgidx 0 is passed up to supplicant */ 1969 if (e->bsscfgidx == 0) 1970 return 0; 1971 1972 /* Filter any P2P probe reqs arriving during the GO-NEG Phase */ 1973 if (test_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status)) { 1974 brcmf_dbg(INFO, "Filtering P2P probe_req in GO-NEG phase\n"); 1975 return 0; 1976 } 1977 1978 /* Check if wpa_supplicant has registered for this frame */ 1979 brcmf_dbg(INFO, "vif->mgmt_rx_reg %04x\n", vif->mgmt_rx_reg); 1980 mgmt_type = (IEEE80211_STYPE_PROBE_REQ & IEEE80211_FCTL_STYPE) >> 4; 1981 if ((vif->mgmt_rx_reg & BIT(mgmt_type)) == 0) 1982 return 0; 1983 1984 mgmt_frame = (u8 *)(rxframe + 1); 1985 mgmt_frame_len = e->datalen - sizeof(*rxframe); 1986 freq = ieee80211_channel_to_frequency(ch.control_ch_num, 1987 ch.band == BRCMU_CHAN_BAND_2G ? 1988 NL80211_BAND_2GHZ : 1989 NL80211_BAND_5GHZ); 1990 1991 cfg80211_rx_mgmt(&vif->wdev, freq, 0, mgmt_frame, mgmt_frame_len, 0); 1992 1993 brcmf_dbg(INFO, "mgmt_frame_len (%d) , e->datalen (%d), chanspec (%04x), freq (%d)\n", 1994 mgmt_frame_len, e->datalen, ch.chspec, freq); 1995 1996 return 0; 1997 } 1998 1999 2000 /** 2001 * brcmf_p2p_get_current_chanspec() - Get current operation channel. 2002 * 2003 * @p2p: P2P specific data. 2004 * @chanspec: chanspec to be returned. 2005 */ 2006 static void brcmf_p2p_get_current_chanspec(struct brcmf_p2p_info *p2p, 2007 u16 *chanspec) 2008 { 2009 struct brcmf_if *ifp; 2010 u8 mac_addr[ETH_ALEN]; 2011 struct brcmu_chan ch; 2012 struct brcmf_bss_info_le *bi; 2013 u8 *buf; 2014 2015 ifp = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->ifp; 2016 2017 if (brcmf_fil_cmd_data_get(ifp, BRCMF_C_GET_BSSID, mac_addr, 2018 ETH_ALEN) == 0) { 2019 buf = kzalloc(WL_BSS_INFO_MAX, GFP_KERNEL); 2020 if (buf != NULL) { 2021 *(__le32 *)buf = cpu_to_le32(WL_BSS_INFO_MAX); 2022 if (brcmf_fil_cmd_data_get(ifp, BRCMF_C_GET_BSS_INFO, 2023 buf, WL_BSS_INFO_MAX) == 0) { 2024 bi = (struct brcmf_bss_info_le *)(buf + 4); 2025 *chanspec = le16_to_cpu(bi->chanspec); 2026 kfree(buf); 2027 return; 2028 } 2029 kfree(buf); 2030 } 2031 } 2032 /* Use default channel for P2P */ 2033 ch.chnum = BRCMF_P2P_TEMP_CHAN; 2034 ch.bw = BRCMU_CHAN_BW_20; 2035 p2p->cfg->d11inf.encchspec(&ch); 2036 *chanspec = ch.chspec; 2037 } 2038 2039 /** 2040 * brcmf_p2p_ifchange - Change a P2P Role. 2041 * @cfg: driver private data for cfg80211 interface. 2042 * @if_type: interface type. 2043 * Returns 0 if success. 2044 */ 2045 int brcmf_p2p_ifchange(struct brcmf_cfg80211_info *cfg, 2046 enum brcmf_fil_p2p_if_types if_type) 2047 { 2048 struct brcmf_p2p_info *p2p = &cfg->p2p; 2049 struct brcmf_pub *drvr = cfg->pub; 2050 struct brcmf_cfg80211_vif *vif; 2051 struct brcmf_fil_p2p_if_le if_request; 2052 s32 err; 2053 u16 chanspec; 2054 2055 brcmf_dbg(TRACE, "Enter\n"); 2056 2057 vif = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif; 2058 if (!vif) { 2059 bphy_err(drvr, "vif for P2PAPI_BSSCFG_PRIMARY does not exist\n"); 2060 return -EPERM; 2061 } 2062 brcmf_notify_escan_complete(cfg, vif->ifp, true, true); 2063 vif = p2p->bss_idx[P2PAPI_BSSCFG_CONNECTION].vif; 2064 if (!vif) { 2065 bphy_err(drvr, "vif for P2PAPI_BSSCFG_CONNECTION does not exist\n"); 2066 return -EPERM; 2067 } 2068 brcmf_set_mpc(vif->ifp, 0); 2069 2070 /* In concurrency case, STA may be already associated in a particular */ 2071 /* channel. so retrieve the current channel of primary interface and */ 2072 /* then start the virtual interface on that. */ 2073 brcmf_p2p_get_current_chanspec(p2p, &chanspec); 2074 2075 if_request.type = cpu_to_le16((u16)if_type); 2076 if_request.chspec = cpu_to_le16(chanspec); 2077 memcpy(if_request.addr, p2p->conn_int_addr, sizeof(if_request.addr)); 2078 2079 brcmf_cfg80211_arm_vif_event(cfg, vif); 2080 err = brcmf_fil_iovar_data_set(vif->ifp, "p2p_ifupd", &if_request, 2081 sizeof(if_request)); 2082 if (err) { 2083 bphy_err(drvr, "p2p_ifupd FAILED, err=%d\n", err); 2084 brcmf_cfg80211_arm_vif_event(cfg, NULL); 2085 return err; 2086 } 2087 err = brcmf_cfg80211_wait_vif_event(cfg, BRCMF_E_IF_CHANGE, 2088 BRCMF_VIF_EVENT_TIMEOUT); 2089 brcmf_cfg80211_arm_vif_event(cfg, NULL); 2090 if (!err) { 2091 bphy_err(drvr, "No BRCMF_E_IF_CHANGE event received\n"); 2092 return -EIO; 2093 } 2094 2095 err = brcmf_fil_cmd_int_set(vif->ifp, BRCMF_C_SET_SCB_TIMEOUT, 2096 BRCMF_SCB_TIMEOUT_VALUE); 2097 2098 return err; 2099 } 2100 2101 static int brcmf_p2p_request_p2p_if(struct brcmf_p2p_info *p2p, 2102 struct brcmf_if *ifp, u8 ea[ETH_ALEN], 2103 enum brcmf_fil_p2p_if_types iftype) 2104 { 2105 struct brcmf_fil_p2p_if_le if_request; 2106 int err; 2107 u16 chanspec; 2108 2109 /* we need a default channel */ 2110 brcmf_p2p_get_current_chanspec(p2p, &chanspec); 2111 2112 /* fill the firmware request */ 2113 memcpy(if_request.addr, ea, ETH_ALEN); 2114 if_request.type = cpu_to_le16((u16)iftype); 2115 if_request.chspec = cpu_to_le16(chanspec); 2116 2117 err = brcmf_fil_iovar_data_set(ifp, "p2p_ifadd", &if_request, 2118 sizeof(if_request)); 2119 2120 return err; 2121 } 2122 2123 static int brcmf_p2p_disable_p2p_if(struct brcmf_cfg80211_vif *vif) 2124 { 2125 struct brcmf_cfg80211_info *cfg = wdev_to_cfg(&vif->wdev); 2126 struct net_device *pri_ndev = cfg_to_ndev(cfg); 2127 struct brcmf_if *ifp = netdev_priv(pri_ndev); 2128 const u8 *addr = vif->wdev.netdev->dev_addr; 2129 2130 return brcmf_fil_iovar_data_set(ifp, "p2p_ifdis", addr, ETH_ALEN); 2131 } 2132 2133 static int brcmf_p2p_release_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 const u8 *addr = vif->wdev.netdev->dev_addr; 2139 2140 return brcmf_fil_iovar_data_set(ifp, "p2p_ifdel", addr, ETH_ALEN); 2141 } 2142 2143 /** 2144 * brcmf_p2p_create_p2pdev() - create a P2P_DEVICE virtual interface. 2145 * 2146 * @p2p: P2P specific data. 2147 * @wiphy: wiphy device of new interface. 2148 * @addr: mac address for this new interface. 2149 */ 2150 static struct wireless_dev *brcmf_p2p_create_p2pdev(struct brcmf_p2p_info *p2p, 2151 struct wiphy *wiphy, 2152 u8 *addr) 2153 { 2154 struct brcmf_pub *drvr = p2p->cfg->pub; 2155 struct brcmf_cfg80211_vif *p2p_vif; 2156 struct brcmf_if *p2p_ifp; 2157 struct brcmf_if *pri_ifp; 2158 int err; 2159 u32 bsscfgidx; 2160 2161 if (p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif) 2162 return ERR_PTR(-ENOSPC); 2163 2164 p2p_vif = brcmf_alloc_vif(p2p->cfg, NL80211_IFTYPE_P2P_DEVICE); 2165 if (IS_ERR(p2p_vif)) { 2166 bphy_err(drvr, "could not create discovery vif\n"); 2167 return (struct wireless_dev *)p2p_vif; 2168 } 2169 2170 pri_ifp = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->ifp; 2171 2172 /* firmware requires unique mac address for p2pdev interface */ 2173 if (addr && ether_addr_equal(addr, pri_ifp->mac_addr)) { 2174 bphy_err(drvr, "discovery vif must be different from primary interface\n"); 2175 err = -EINVAL; 2176 goto fail; 2177 } 2178 2179 brcmf_p2p_generate_bss_mac(p2p, addr); 2180 brcmf_p2p_set_firmware(pri_ifp, p2p->dev_addr); 2181 2182 brcmf_cfg80211_arm_vif_event(p2p->cfg, p2p_vif); 2183 brcmf_fweh_p2pdev_setup(pri_ifp, true); 2184 2185 /* Initialize P2P Discovery in the firmware */ 2186 err = brcmf_fil_iovar_int_set(pri_ifp, "p2p_disc", 1); 2187 if (err < 0) { 2188 bphy_err(drvr, "set p2p_disc error\n"); 2189 brcmf_fweh_p2pdev_setup(pri_ifp, false); 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(p2p->cfg, BRCMF_E_IF_ADD, 2196 BRCMF_VIF_EVENT_TIMEOUT); 2197 brcmf_cfg80211_arm_vif_event(p2p->cfg, NULL); 2198 brcmf_fweh_p2pdev_setup(pri_ifp, false); 2199 if (!err) { 2200 bphy_err(drvr, "timeout occurred\n"); 2201 err = -EIO; 2202 goto fail; 2203 } 2204 2205 /* discovery interface created */ 2206 p2p_ifp = p2p_vif->ifp; 2207 p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif = p2p_vif; 2208 memcpy(p2p_ifp->mac_addr, p2p->dev_addr, ETH_ALEN); 2209 memcpy(&p2p_vif->wdev.address, p2p->dev_addr, sizeof(p2p->dev_addr)); 2210 2211 /* verify bsscfg index for P2P discovery */ 2212 err = brcmf_fil_iovar_int_get(pri_ifp, "p2p_dev", &bsscfgidx); 2213 if (err < 0) { 2214 bphy_err(drvr, "retrieving discover bsscfg index failed\n"); 2215 goto fail; 2216 } 2217 2218 WARN_ON(p2p_ifp->bsscfgidx != bsscfgidx); 2219 2220 init_completion(&p2p->send_af_done); 2221 INIT_WORK(&p2p->afx_hdl.afx_work, brcmf_p2p_afx_handler); 2222 init_completion(&p2p->afx_hdl.act_frm_scan); 2223 init_completion(&p2p->wait_next_af); 2224 2225 return &p2p_vif->wdev; 2226 2227 fail: 2228 brcmf_free_vif(p2p_vif); 2229 return ERR_PTR(err); 2230 } 2231 2232 static int brcmf_p2p_get_conn_idx(struct brcmf_cfg80211_info *cfg) 2233 { 2234 int i; 2235 struct brcmf_if *ifp = netdev_priv(cfg_to_ndev(cfg)); 2236 2237 if (!ifp) 2238 return -ENODEV; 2239 2240 for (i = P2PAPI_BSSCFG_CONNECTION; i < P2PAPI_BSSCFG_MAX; i++) { 2241 if (!cfg->p2p.bss_idx[i].vif) { 2242 if (i == P2PAPI_BSSCFG_CONNECTION2 && 2243 !(brcmf_feat_is_enabled(ifp, BRCMF_FEAT_RSDB))) { 2244 brcmf_err("Multi p2p not supported"); 2245 return -EIO; 2246 } 2247 return i; 2248 } 2249 } 2250 return -EIO; 2251 } 2252 2253 /** 2254 * brcmf_p2p_add_vif() - create a new P2P virtual interface. 2255 * 2256 * @wiphy: wiphy device of new interface. 2257 * @name: name of the new interface. 2258 * @name_assign_type: origin of the interface name 2259 * @type: nl80211 interface type. 2260 * @params: contains mac address for P2P device. 2261 */ 2262 struct wireless_dev *brcmf_p2p_add_vif(struct wiphy *wiphy, const char *name, 2263 unsigned char name_assign_type, 2264 enum nl80211_iftype type, 2265 struct vif_params *params) 2266 { 2267 struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy); 2268 struct brcmf_if *ifp = netdev_priv(cfg_to_ndev(cfg)); 2269 struct brcmf_pub *drvr = cfg->pub; 2270 struct brcmf_cfg80211_vif *vif; 2271 enum brcmf_fil_p2p_if_types iftype; 2272 int err = 0; 2273 int connidx; 2274 u8 *p2p_intf_addr; 2275 2276 if (brcmf_cfg80211_vif_event_armed(cfg)) 2277 return ERR_PTR(-EBUSY); 2278 2279 brcmf_dbg(INFO, "adding vif \"%s\" (type=%d)\n", name, type); 2280 2281 switch (type) { 2282 case NL80211_IFTYPE_P2P_CLIENT: 2283 iftype = BRCMF_FIL_P2P_IF_CLIENT; 2284 break; 2285 case NL80211_IFTYPE_P2P_GO: 2286 iftype = BRCMF_FIL_P2P_IF_GO; 2287 break; 2288 case NL80211_IFTYPE_P2P_DEVICE: 2289 return brcmf_p2p_create_p2pdev(&cfg->p2p, wiphy, 2290 params->macaddr); 2291 default: 2292 return ERR_PTR(-EOPNOTSUPP); 2293 } 2294 2295 vif = brcmf_alloc_vif(cfg, type); 2296 if (IS_ERR(vif)) 2297 return (struct wireless_dev *)vif; 2298 brcmf_cfg80211_arm_vif_event(cfg, vif); 2299 2300 connidx = brcmf_p2p_get_conn_idx(cfg); 2301 2302 if (connidx == P2PAPI_BSSCFG_CONNECTION) 2303 p2p_intf_addr = cfg->p2p.conn_int_addr; 2304 else if (connidx == P2PAPI_BSSCFG_CONNECTION2) 2305 p2p_intf_addr = cfg->p2p.conn2_int_addr; 2306 else 2307 err = -EINVAL; 2308 2309 if (!err) 2310 err = brcmf_p2p_request_p2p_if(&cfg->p2p, ifp, 2311 p2p_intf_addr, iftype); 2312 2313 if (err) { 2314 brcmf_err("request p2p interface failed\n"); 2315 brcmf_cfg80211_arm_vif_event(cfg, NULL); 2316 goto fail; 2317 } 2318 2319 /* wait for firmware event */ 2320 err = brcmf_cfg80211_wait_vif_event(cfg, BRCMF_E_IF_ADD, 2321 BRCMF_VIF_EVENT_TIMEOUT); 2322 brcmf_cfg80211_arm_vif_event(cfg, NULL); 2323 if (!err) { 2324 bphy_err(drvr, "timeout occurred\n"); 2325 err = -EIO; 2326 goto fail; 2327 } 2328 2329 /* interface created in firmware */ 2330 ifp = vif->ifp; 2331 if (!ifp) { 2332 bphy_err(drvr, "no if pointer provided\n"); 2333 err = -ENOENT; 2334 goto fail; 2335 } 2336 2337 strncpy(ifp->ndev->name, name, sizeof(ifp->ndev->name) - 1); 2338 ifp->ndev->name_assign_type = name_assign_type; 2339 err = brcmf_net_attach(ifp, true); 2340 if (err) { 2341 bphy_err(drvr, "Registering netdevice failed\n"); 2342 free_netdev(ifp->ndev); 2343 goto fail; 2344 } 2345 2346 cfg->p2p.bss_idx[connidx].vif = vif; 2347 /* Disable firmware roaming for P2P interface */ 2348 brcmf_fil_iovar_int_set(ifp, "roam_off", 1); 2349 if (iftype == BRCMF_FIL_P2P_IF_GO) { 2350 /* set station timeout for p2p */ 2351 brcmf_fil_cmd_int_set(ifp, BRCMF_C_SET_SCB_TIMEOUT, 2352 BRCMF_SCB_TIMEOUT_VALUE); 2353 } 2354 return &ifp->vif->wdev; 2355 2356 fail: 2357 brcmf_free_vif(vif); 2358 return ERR_PTR(err); 2359 } 2360 2361 /** 2362 * brcmf_p2p_del_vif() - delete a P2P virtual interface. 2363 * 2364 * @wiphy: wiphy device of interface. 2365 * @wdev: wireless device of interface. 2366 */ 2367 int brcmf_p2p_del_vif(struct wiphy *wiphy, struct wireless_dev *wdev) 2368 { 2369 struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy); 2370 struct brcmf_p2p_info *p2p = &cfg->p2p; 2371 struct brcmf_cfg80211_vif *vif; 2372 enum nl80211_iftype iftype; 2373 bool wait_for_disable = false; 2374 int err; 2375 2376 brcmf_dbg(TRACE, "delete P2P vif\n"); 2377 vif = container_of(wdev, struct brcmf_cfg80211_vif, wdev); 2378 2379 iftype = vif->wdev.iftype; 2380 brcmf_cfg80211_arm_vif_event(cfg, vif); 2381 switch (iftype) { 2382 case NL80211_IFTYPE_P2P_CLIENT: 2383 if (test_bit(BRCMF_VIF_STATUS_DISCONNECTING, &vif->sme_state)) 2384 wait_for_disable = true; 2385 break; 2386 2387 case NL80211_IFTYPE_P2P_GO: 2388 if (!brcmf_p2p_disable_p2p_if(vif)) 2389 wait_for_disable = true; 2390 break; 2391 2392 case NL80211_IFTYPE_P2P_DEVICE: 2393 if (!p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif) 2394 return 0; 2395 brcmf_p2p_cancel_remain_on_channel(vif->ifp); 2396 brcmf_p2p_deinit_discovery(p2p); 2397 break; 2398 2399 default: 2400 return -ENOTSUPP; 2401 } 2402 2403 clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status); 2404 brcmf_dbg(INFO, "P2P: GO_NEG_PHASE status cleared\n"); 2405 2406 if (wait_for_disable) 2407 wait_for_completion_timeout(&cfg->vif_disabled, 2408 BRCMF_P2P_DISABLE_TIMEOUT); 2409 2410 err = 0; 2411 if (iftype != NL80211_IFTYPE_P2P_DEVICE) { 2412 brcmf_vif_clear_mgmt_ies(vif); 2413 err = brcmf_p2p_release_p2p_if(vif); 2414 } 2415 if (!err) { 2416 /* wait for firmware event */ 2417 err = brcmf_cfg80211_wait_vif_event(cfg, BRCMF_E_IF_DEL, 2418 BRCMF_VIF_EVENT_TIMEOUT); 2419 if (!err) 2420 err = -EIO; 2421 else 2422 err = 0; 2423 } 2424 brcmf_remove_interface(vif->ifp, true); 2425 2426 brcmf_cfg80211_arm_vif_event(cfg, NULL); 2427 if (iftype != NL80211_IFTYPE_P2P_DEVICE) 2428 p2p->bss_idx[P2PAPI_BSSCFG_CONNECTION].vif = NULL; 2429 2430 return err; 2431 } 2432 2433 void brcmf_p2p_ifp_removed(struct brcmf_if *ifp, bool locked) 2434 { 2435 struct brcmf_cfg80211_info *cfg; 2436 struct brcmf_cfg80211_vif *vif; 2437 2438 brcmf_dbg(INFO, "P2P: device interface removed\n"); 2439 vif = ifp->vif; 2440 cfg = wdev_to_cfg(&vif->wdev); 2441 cfg->p2p.bss_idx[P2PAPI_BSSCFG_DEVICE].vif = NULL; 2442 if (!locked) { 2443 rtnl_lock(); 2444 wiphy_lock(cfg->wiphy); 2445 cfg80211_unregister_wdev(&vif->wdev); 2446 wiphy_unlock(cfg->wiphy); 2447 rtnl_unlock(); 2448 } else { 2449 cfg80211_unregister_wdev(&vif->wdev); 2450 } 2451 brcmf_free_vif(vif); 2452 } 2453 2454 int brcmf_p2p_start_device(struct wiphy *wiphy, struct wireless_dev *wdev) 2455 { 2456 struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy); 2457 struct brcmf_p2p_info *p2p = &cfg->p2p; 2458 struct brcmf_cfg80211_vif *vif; 2459 int err; 2460 2461 vif = container_of(wdev, struct brcmf_cfg80211_vif, wdev); 2462 mutex_lock(&cfg->usr_sync); 2463 err = brcmf_p2p_enable_discovery(p2p); 2464 if (!err) 2465 set_bit(BRCMF_VIF_STATUS_READY, &vif->sme_state); 2466 mutex_unlock(&cfg->usr_sync); 2467 return err; 2468 } 2469 2470 void brcmf_p2p_stop_device(struct wiphy *wiphy, struct wireless_dev *wdev) 2471 { 2472 struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy); 2473 struct brcmf_p2p_info *p2p = &cfg->p2p; 2474 struct brcmf_cfg80211_vif *vif; 2475 2476 vif = container_of(wdev, struct brcmf_cfg80211_vif, wdev); 2477 /* This call can be result of the unregister_wdev call. In that case 2478 * we dont want to do anything anymore. Just return. The config vif 2479 * will have been cleared at this point. 2480 */ 2481 if (p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif == vif) { 2482 mutex_lock(&cfg->usr_sync); 2483 /* Set the discovery state to SCAN */ 2484 (void)brcmf_p2p_set_discover_state(vif->ifp, 2485 WL_P2P_DISC_ST_SCAN, 0, 0); 2486 brcmf_abort_scanning(cfg); 2487 clear_bit(BRCMF_VIF_STATUS_READY, &vif->sme_state); 2488 mutex_unlock(&cfg->usr_sync); 2489 } 2490 } 2491 2492 /** 2493 * brcmf_p2p_attach() - attach for P2P. 2494 * 2495 * @cfg: driver private data for cfg80211 interface. 2496 * @p2pdev_forced: create p2p device interface at attach. 2497 */ 2498 s32 brcmf_p2p_attach(struct brcmf_cfg80211_info *cfg, bool p2pdev_forced) 2499 { 2500 struct brcmf_pub *drvr = cfg->pub; 2501 struct brcmf_p2p_info *p2p; 2502 struct brcmf_if *pri_ifp; 2503 s32 err = 0; 2504 void *err_ptr; 2505 2506 p2p = &cfg->p2p; 2507 p2p->cfg = cfg; 2508 2509 pri_ifp = brcmf_get_ifp(cfg->pub, 0); 2510 p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif = pri_ifp->vif; 2511 2512 if (p2pdev_forced) { 2513 err_ptr = brcmf_p2p_create_p2pdev(p2p, NULL, NULL); 2514 if (IS_ERR(err_ptr)) { 2515 bphy_err(drvr, "P2P device creation failed.\n"); 2516 err = PTR_ERR(err_ptr); 2517 } 2518 } else { 2519 p2p->p2pdev_dynamically = true; 2520 } 2521 return err; 2522 } 2523 2524 /** 2525 * brcmf_p2p_detach() - detach P2P. 2526 * 2527 * @p2p: P2P specific data. 2528 */ 2529 void brcmf_p2p_detach(struct brcmf_p2p_info *p2p) 2530 { 2531 struct brcmf_cfg80211_vif *vif; 2532 2533 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif; 2534 if (vif != NULL) { 2535 brcmf_p2p_cancel_remain_on_channel(vif->ifp); 2536 brcmf_p2p_deinit_discovery(p2p); 2537 brcmf_remove_interface(vif->ifp, false); 2538 } 2539 /* just set it all to zero */ 2540 memset(p2p, 0, sizeof(*p2p)); 2541 } 2542 2543