1 /* 2 * Copyright (c) 2012 Broadcom Corporation 3 * 4 * Permission to use, copy, modify, and/or distribute this software for any 5 * purpose with or without fee is hereby granted, provided that the above 6 * copyright notice and this permission notice appear in all copies. 7 * 8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY 11 * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION 13 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN 14 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 15 */ 16 #include <linux/slab.h> 17 #include <linux/netdevice.h> 18 #include <linux/etherdevice.h> 19 #include <linux/rtnetlink.h> 20 #include <net/cfg80211.h> 21 22 #include <brcmu_wifi.h> 23 #include <brcmu_utils.h> 24 #include <defs.h> 25 #include "core.h" 26 #include "debug.h" 27 #include "fwil.h" 28 #include "fwil_types.h" 29 #include "p2p.h" 30 #include "cfg80211.h" 31 32 /* parameters used for p2p escan */ 33 #define P2PAPI_SCAN_NPROBES 1 34 #define P2PAPI_SCAN_DWELL_TIME_MS 80 35 #define P2PAPI_SCAN_SOCIAL_DWELL_TIME_MS 40 36 #define P2PAPI_SCAN_HOME_TIME_MS 60 37 #define P2PAPI_SCAN_NPROBS_TIME_MS 30 38 #define P2PAPI_SCAN_AF_SEARCH_DWELL_TIME_MS 100 39 #define WL_SCAN_CONNECT_DWELL_TIME_MS 200 40 #define WL_SCAN_JOIN_PROBE_INTERVAL_MS 20 41 42 #define BRCMF_P2P_WILDCARD_SSID "DIRECT-" 43 #define BRCMF_P2P_WILDCARD_SSID_LEN (sizeof(BRCMF_P2P_WILDCARD_SSID) - 1) 44 45 #define SOCIAL_CHAN_1 1 46 #define SOCIAL_CHAN_2 6 47 #define SOCIAL_CHAN_3 11 48 #define IS_P2P_SOCIAL_CHANNEL(channel) ((channel == SOCIAL_CHAN_1) || \ 49 (channel == SOCIAL_CHAN_2) || \ 50 (channel == SOCIAL_CHAN_3)) 51 #define BRCMF_P2P_TEMP_CHAN SOCIAL_CHAN_3 52 #define SOCIAL_CHAN_CNT 3 53 #define AF_PEER_SEARCH_CNT 2 54 55 #define BRCMF_SCB_TIMEOUT_VALUE 20 56 57 #define P2P_VER 9 /* P2P version: 9=WiFi P2P v1.0 */ 58 #define P2P_PUB_AF_CATEGORY 0x04 59 #define P2P_PUB_AF_ACTION 0x09 60 #define P2P_AF_CATEGORY 0x7f 61 #define P2P_OUI "\x50\x6F\x9A" /* P2P OUI */ 62 #define P2P_OUI_LEN 3 /* P2P OUI length */ 63 64 /* Action Frame Constants */ 65 #define DOT11_ACTION_HDR_LEN 2 /* action frame category + action */ 66 #define DOT11_ACTION_CAT_OFF 0 /* category offset */ 67 #define DOT11_ACTION_ACT_OFF 1 /* action offset */ 68 69 #define P2P_AF_DWELL_TIME 200 70 #define P2P_AF_MIN_DWELL_TIME 100 71 #define P2P_AF_MED_DWELL_TIME 400 72 #define P2P_AF_LONG_DWELL_TIME 1000 73 #define P2P_AF_TX_MAX_RETRY 1 74 #define P2P_AF_MAX_WAIT_TIME msecs_to_jiffies(2000) 75 #define P2P_INVALID_CHANNEL -1 76 #define P2P_CHANNEL_SYNC_RETRY 5 77 #define P2P_AF_FRM_SCAN_MAX_WAIT msecs_to_jiffies(1500) 78 #define P2P_DEFAULT_SLEEP_TIME_VSDB 200 79 80 /* WiFi P2P Public Action Frame OUI Subtypes */ 81 #define P2P_PAF_GON_REQ 0 /* Group Owner Negotiation Req */ 82 #define P2P_PAF_GON_RSP 1 /* Group Owner Negotiation Rsp */ 83 #define P2P_PAF_GON_CONF 2 /* Group Owner Negotiation Confirm */ 84 #define P2P_PAF_INVITE_REQ 3 /* P2P Invitation Request */ 85 #define P2P_PAF_INVITE_RSP 4 /* P2P Invitation Response */ 86 #define P2P_PAF_DEVDIS_REQ 5 /* Device Discoverability Request */ 87 #define P2P_PAF_DEVDIS_RSP 6 /* Device Discoverability Response */ 88 #define P2P_PAF_PROVDIS_REQ 7 /* Provision Discovery Request */ 89 #define P2P_PAF_PROVDIS_RSP 8 /* Provision Discovery Response */ 90 #define P2P_PAF_SUBTYPE_INVALID 255 /* Invalid Subtype */ 91 92 /* WiFi P2P Action Frame OUI Subtypes */ 93 #define P2P_AF_NOTICE_OF_ABSENCE 0 /* Notice of Absence */ 94 #define P2P_AF_PRESENCE_REQ 1 /* P2P Presence Request */ 95 #define P2P_AF_PRESENCE_RSP 2 /* P2P Presence Response */ 96 #define P2P_AF_GO_DISC_REQ 3 /* GO Discoverability Request */ 97 98 /* P2P Service Discovery related */ 99 #define P2PSD_ACTION_CATEGORY 0x04 /* Public action frame */ 100 #define P2PSD_ACTION_ID_GAS_IREQ 0x0a /* GAS Initial Request AF */ 101 #define P2PSD_ACTION_ID_GAS_IRESP 0x0b /* GAS Initial Response AF */ 102 #define P2PSD_ACTION_ID_GAS_CREQ 0x0c /* GAS Comback Request AF */ 103 #define P2PSD_ACTION_ID_GAS_CRESP 0x0d /* GAS Comback Response AF */ 104 105 #define BRCMF_P2P_DISABLE_TIMEOUT msecs_to_jiffies(500) 106 /** 107 * struct brcmf_p2p_disc_st_le - set discovery state in firmware. 108 * 109 * @state: requested discovery state (see enum brcmf_p2p_disc_state). 110 * @chspec: channel parameter for %WL_P2P_DISC_ST_LISTEN state. 111 * @dwell: dwell time in ms for %WL_P2P_DISC_ST_LISTEN state. 112 */ 113 struct brcmf_p2p_disc_st_le { 114 u8 state; 115 __le16 chspec; 116 __le16 dwell; 117 }; 118 119 /** 120 * enum brcmf_p2p_disc_state - P2P discovery state values 121 * 122 * @WL_P2P_DISC_ST_SCAN: P2P discovery with wildcard SSID and P2P IE. 123 * @WL_P2P_DISC_ST_LISTEN: P2P discovery off-channel for specified time. 124 * @WL_P2P_DISC_ST_SEARCH: P2P discovery with P2P wildcard SSID and P2P IE. 125 */ 126 enum brcmf_p2p_disc_state { 127 WL_P2P_DISC_ST_SCAN, 128 WL_P2P_DISC_ST_LISTEN, 129 WL_P2P_DISC_ST_SEARCH 130 }; 131 132 /** 133 * struct brcmf_p2p_scan_le - P2P specific scan request. 134 * 135 * @type: type of scan method requested (values: 'E' or 'S'). 136 * @reserved: reserved (ignored). 137 * @eparams: parameters used for type 'E'. 138 * @sparams: parameters used for type 'S'. 139 */ 140 struct brcmf_p2p_scan_le { 141 u8 type; 142 u8 reserved[3]; 143 union { 144 struct brcmf_escan_params_le eparams; 145 struct brcmf_scan_params_le sparams; 146 }; 147 }; 148 149 /** 150 * struct brcmf_p2p_pub_act_frame - WiFi P2P Public Action Frame 151 * 152 * @category: P2P_PUB_AF_CATEGORY 153 * @action: P2P_PUB_AF_ACTION 154 * @oui[3]: P2P_OUI 155 * @oui_type: OUI type - P2P_VER 156 * @subtype: OUI subtype - P2P_TYPE_* 157 * @dialog_token: nonzero, identifies req/rsp transaction 158 * @elts[1]: Variable length information elements. 159 */ 160 struct brcmf_p2p_pub_act_frame { 161 u8 category; 162 u8 action; 163 u8 oui[3]; 164 u8 oui_type; 165 u8 subtype; 166 u8 dialog_token; 167 u8 elts[1]; 168 }; 169 170 /** 171 * struct brcmf_p2p_action_frame - WiFi P2P Action Frame 172 * 173 * @category: P2P_AF_CATEGORY 174 * @OUI[3]: OUI - P2P_OUI 175 * @type: OUI Type - P2P_VER 176 * @subtype: OUI Subtype - P2P_AF_* 177 * @dialog_token: nonzero, identifies req/resp tranaction 178 * @elts[1]: Variable length information elements. 179 */ 180 struct brcmf_p2p_action_frame { 181 u8 category; 182 u8 oui[3]; 183 u8 type; 184 u8 subtype; 185 u8 dialog_token; 186 u8 elts[1]; 187 }; 188 189 /** 190 * struct brcmf_p2psd_gas_pub_act_frame - Wi-Fi GAS Public Action Frame 191 * 192 * @category: 0x04 Public Action Frame 193 * @action: 0x6c Advertisement Protocol 194 * @dialog_token: nonzero, identifies req/rsp transaction 195 * @query_data[1]: Query Data. SD gas ireq SD gas iresp 196 */ 197 struct brcmf_p2psd_gas_pub_act_frame { 198 u8 category; 199 u8 action; 200 u8 dialog_token; 201 u8 query_data[1]; 202 }; 203 204 /** 205 * struct brcmf_config_af_params - Action Frame Parameters for tx. 206 * 207 * @mpc_onoff: To make sure to send successfully action frame, we have to 208 * turn off mpc 0: off, 1: on, (-1): do nothing 209 * @search_channel: 1: search peer's channel to send af 210 * extra_listen: keep the dwell time to get af response frame. 211 */ 212 struct brcmf_config_af_params { 213 s32 mpc_onoff; 214 bool search_channel; 215 bool extra_listen; 216 }; 217 218 /** 219 * brcmf_p2p_is_pub_action() - true if p2p public type frame. 220 * 221 * @frame: action frame data. 222 * @frame_len: length of action frame data. 223 * 224 * Determine if action frame is p2p public action type 225 */ 226 static bool brcmf_p2p_is_pub_action(void *frame, u32 frame_len) 227 { 228 struct brcmf_p2p_pub_act_frame *pact_frm; 229 230 if (frame == NULL) 231 return false; 232 233 pact_frm = (struct brcmf_p2p_pub_act_frame *)frame; 234 if (frame_len < sizeof(struct brcmf_p2p_pub_act_frame) - 1) 235 return false; 236 237 if (pact_frm->category == P2P_PUB_AF_CATEGORY && 238 pact_frm->action == P2P_PUB_AF_ACTION && 239 pact_frm->oui_type == P2P_VER && 240 memcmp(pact_frm->oui, P2P_OUI, P2P_OUI_LEN) == 0) 241 return true; 242 243 return false; 244 } 245 246 /** 247 * brcmf_p2p_is_p2p_action() - true if p2p action type frame. 248 * 249 * @frame: action frame data. 250 * @frame_len: length of action frame data. 251 * 252 * Determine if action frame is p2p action type 253 */ 254 static bool brcmf_p2p_is_p2p_action(void *frame, u32 frame_len) 255 { 256 struct brcmf_p2p_action_frame *act_frm; 257 258 if (frame == NULL) 259 return false; 260 261 act_frm = (struct brcmf_p2p_action_frame *)frame; 262 if (frame_len < sizeof(struct brcmf_p2p_action_frame) - 1) 263 return false; 264 265 if (act_frm->category == P2P_AF_CATEGORY && 266 act_frm->type == P2P_VER && 267 memcmp(act_frm->oui, P2P_OUI, P2P_OUI_LEN) == 0) 268 return true; 269 270 return false; 271 } 272 273 /** 274 * brcmf_p2p_is_gas_action() - true if p2p gas action type frame. 275 * 276 * @frame: action frame data. 277 * @frame_len: length of action frame data. 278 * 279 * Determine if action frame is p2p gas action type 280 */ 281 static bool brcmf_p2p_is_gas_action(void *frame, u32 frame_len) 282 { 283 struct brcmf_p2psd_gas_pub_act_frame *sd_act_frm; 284 285 if (frame == NULL) 286 return false; 287 288 sd_act_frm = (struct brcmf_p2psd_gas_pub_act_frame *)frame; 289 if (frame_len < sizeof(struct brcmf_p2psd_gas_pub_act_frame) - 1) 290 return false; 291 292 if (sd_act_frm->category != P2PSD_ACTION_CATEGORY) 293 return false; 294 295 if (sd_act_frm->action == P2PSD_ACTION_ID_GAS_IREQ || 296 sd_act_frm->action == P2PSD_ACTION_ID_GAS_IRESP || 297 sd_act_frm->action == P2PSD_ACTION_ID_GAS_CREQ || 298 sd_act_frm->action == P2PSD_ACTION_ID_GAS_CRESP) 299 return true; 300 301 return false; 302 } 303 304 /** 305 * brcmf_p2p_print_actframe() - debug print routine. 306 * 307 * @tx: Received or to be transmitted 308 * @frame: action frame data. 309 * @frame_len: length of action frame data. 310 * 311 * Print information about the p2p action frame 312 */ 313 314 #ifdef DEBUG 315 316 static void brcmf_p2p_print_actframe(bool tx, void *frame, u32 frame_len) 317 { 318 struct brcmf_p2p_pub_act_frame *pact_frm; 319 struct brcmf_p2p_action_frame *act_frm; 320 struct brcmf_p2psd_gas_pub_act_frame *sd_act_frm; 321 322 if (!frame || frame_len <= 2) 323 return; 324 325 if (brcmf_p2p_is_pub_action(frame, frame_len)) { 326 pact_frm = (struct brcmf_p2p_pub_act_frame *)frame; 327 switch (pact_frm->subtype) { 328 case P2P_PAF_GON_REQ: 329 brcmf_dbg(TRACE, "%s P2P Group Owner Negotiation Req Frame\n", 330 (tx) ? "TX" : "RX"); 331 break; 332 case P2P_PAF_GON_RSP: 333 brcmf_dbg(TRACE, "%s P2P Group Owner Negotiation Rsp Frame\n", 334 (tx) ? "TX" : "RX"); 335 break; 336 case P2P_PAF_GON_CONF: 337 brcmf_dbg(TRACE, "%s P2P Group Owner Negotiation Confirm Frame\n", 338 (tx) ? "TX" : "RX"); 339 break; 340 case P2P_PAF_INVITE_REQ: 341 brcmf_dbg(TRACE, "%s P2P Invitation Request Frame\n", 342 (tx) ? "TX" : "RX"); 343 break; 344 case P2P_PAF_INVITE_RSP: 345 brcmf_dbg(TRACE, "%s P2P Invitation Response Frame\n", 346 (tx) ? "TX" : "RX"); 347 break; 348 case P2P_PAF_DEVDIS_REQ: 349 brcmf_dbg(TRACE, "%s P2P Device Discoverability Request Frame\n", 350 (tx) ? "TX" : "RX"); 351 break; 352 case P2P_PAF_DEVDIS_RSP: 353 brcmf_dbg(TRACE, "%s P2P Device Discoverability Response Frame\n", 354 (tx) ? "TX" : "RX"); 355 break; 356 case P2P_PAF_PROVDIS_REQ: 357 brcmf_dbg(TRACE, "%s P2P Provision Discovery Request Frame\n", 358 (tx) ? "TX" : "RX"); 359 break; 360 case P2P_PAF_PROVDIS_RSP: 361 brcmf_dbg(TRACE, "%s P2P Provision Discovery Response Frame\n", 362 (tx) ? "TX" : "RX"); 363 break; 364 default: 365 brcmf_dbg(TRACE, "%s Unknown P2P Public Action Frame\n", 366 (tx) ? "TX" : "RX"); 367 break; 368 } 369 } else if (brcmf_p2p_is_p2p_action(frame, frame_len)) { 370 act_frm = (struct brcmf_p2p_action_frame *)frame; 371 switch (act_frm->subtype) { 372 case P2P_AF_NOTICE_OF_ABSENCE: 373 brcmf_dbg(TRACE, "%s P2P Notice of Absence Frame\n", 374 (tx) ? "TX" : "RX"); 375 break; 376 case P2P_AF_PRESENCE_REQ: 377 brcmf_dbg(TRACE, "%s P2P Presence Request Frame\n", 378 (tx) ? "TX" : "RX"); 379 break; 380 case P2P_AF_PRESENCE_RSP: 381 brcmf_dbg(TRACE, "%s P2P Presence Response Frame\n", 382 (tx) ? "TX" : "RX"); 383 break; 384 case P2P_AF_GO_DISC_REQ: 385 brcmf_dbg(TRACE, "%s P2P Discoverability Request Frame\n", 386 (tx) ? "TX" : "RX"); 387 break; 388 default: 389 brcmf_dbg(TRACE, "%s Unknown P2P Action Frame\n", 390 (tx) ? "TX" : "RX"); 391 } 392 393 } else if (brcmf_p2p_is_gas_action(frame, frame_len)) { 394 sd_act_frm = (struct brcmf_p2psd_gas_pub_act_frame *)frame; 395 switch (sd_act_frm->action) { 396 case P2PSD_ACTION_ID_GAS_IREQ: 397 brcmf_dbg(TRACE, "%s P2P GAS Initial Request\n", 398 (tx) ? "TX" : "RX"); 399 break; 400 case P2PSD_ACTION_ID_GAS_IRESP: 401 brcmf_dbg(TRACE, "%s P2P GAS Initial Response\n", 402 (tx) ? "TX" : "RX"); 403 break; 404 case P2PSD_ACTION_ID_GAS_CREQ: 405 brcmf_dbg(TRACE, "%s P2P GAS Comback Request\n", 406 (tx) ? "TX" : "RX"); 407 break; 408 case P2PSD_ACTION_ID_GAS_CRESP: 409 brcmf_dbg(TRACE, "%s P2P GAS Comback Response\n", 410 (tx) ? "TX" : "RX"); 411 break; 412 default: 413 brcmf_dbg(TRACE, "%s Unknown P2P GAS Frame\n", 414 (tx) ? "TX" : "RX"); 415 break; 416 } 417 } 418 } 419 420 #else 421 422 static void brcmf_p2p_print_actframe(bool tx, void *frame, u32 frame_len) 423 { 424 } 425 426 #endif 427 428 429 /** 430 * brcmf_p2p_set_firmware() - prepare firmware for peer-to-peer operation. 431 * 432 * @ifp: ifp to use for iovars (primary). 433 * @p2p_mac: mac address to configure for p2p_da_override 434 */ 435 static int brcmf_p2p_set_firmware(struct brcmf_if *ifp, u8 *p2p_mac) 436 { 437 s32 ret = 0; 438 439 brcmf_fil_cmd_int_set(ifp, BRCMF_C_DOWN, 1); 440 brcmf_fil_iovar_int_set(ifp, "apsta", 1); 441 brcmf_fil_cmd_int_set(ifp, BRCMF_C_UP, 1); 442 443 /* In case of COB type, firmware has default mac address 444 * After Initializing firmware, we have to set current mac address to 445 * firmware for P2P device address. This must be done with discovery 446 * disabled. 447 */ 448 brcmf_fil_iovar_int_set(ifp, "p2p_disc", 0); 449 450 ret = brcmf_fil_iovar_data_set(ifp, "p2p_da_override", p2p_mac, 451 ETH_ALEN); 452 if (ret) 453 brcmf_err("failed to update device address ret %d\n", ret); 454 455 return ret; 456 } 457 458 /** 459 * brcmf_p2p_generate_bss_mac() - derive mac addresses for P2P. 460 * 461 * @p2p: P2P specific data. 462 * @dev_addr: optional device address. 463 * 464 * P2P needs mac addresses for P2P device and interface. If no device 465 * address it specified, these are derived from the primary net device, ie. 466 * the permanent ethernet address of the device. 467 */ 468 static void brcmf_p2p_generate_bss_mac(struct brcmf_p2p_info *p2p, u8 *dev_addr) 469 { 470 struct brcmf_if *pri_ifp = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->ifp; 471 bool local_admin = false; 472 473 if (!dev_addr || is_zero_ether_addr(dev_addr)) { 474 dev_addr = pri_ifp->mac_addr; 475 local_admin = true; 476 } 477 478 /* Generate the P2P Device Address. This consists of the device's 479 * primary MAC address with the locally administered bit set. 480 */ 481 memcpy(p2p->dev_addr, dev_addr, ETH_ALEN); 482 if (local_admin) 483 p2p->dev_addr[0] |= 0x02; 484 485 /* Generate the P2P Interface Address. If the discovery and connection 486 * BSSCFGs need to simultaneously co-exist, then this address must be 487 * different from the P2P Device Address, but also locally administered. 488 */ 489 memcpy(p2p->int_addr, p2p->dev_addr, ETH_ALEN); 490 p2p->int_addr[0] |= 0x02; 491 p2p->int_addr[4] ^= 0x80; 492 } 493 494 /** 495 * brcmf_p2p_scan_is_p2p_request() - is cfg80211 scan request a P2P scan. 496 * 497 * @request: the scan request as received from cfg80211. 498 * 499 * returns true if one of the ssids in the request matches the 500 * P2P wildcard ssid; otherwise returns false. 501 */ 502 static bool brcmf_p2p_scan_is_p2p_request(struct cfg80211_scan_request *request) 503 { 504 struct cfg80211_ssid *ssids = request->ssids; 505 int i; 506 507 for (i = 0; i < request->n_ssids; i++) { 508 if (ssids[i].ssid_len != BRCMF_P2P_WILDCARD_SSID_LEN) 509 continue; 510 511 brcmf_dbg(INFO, "comparing ssid \"%s\"", ssids[i].ssid); 512 if (!memcmp(BRCMF_P2P_WILDCARD_SSID, ssids[i].ssid, 513 BRCMF_P2P_WILDCARD_SSID_LEN)) 514 return true; 515 } 516 return false; 517 } 518 519 /** 520 * brcmf_p2p_set_discover_state - set discover state in firmware. 521 * 522 * @ifp: low-level interface object. 523 * @state: discover state to set. 524 * @chanspec: channel parameters (for state @WL_P2P_DISC_ST_LISTEN only). 525 * @listen_ms: duration to listen (for state @WL_P2P_DISC_ST_LISTEN only). 526 */ 527 static s32 brcmf_p2p_set_discover_state(struct brcmf_if *ifp, u8 state, 528 u16 chanspec, u16 listen_ms) 529 { 530 struct brcmf_p2p_disc_st_le discover_state; 531 s32 ret = 0; 532 brcmf_dbg(TRACE, "enter\n"); 533 534 discover_state.state = state; 535 discover_state.chspec = cpu_to_le16(chanspec); 536 discover_state.dwell = cpu_to_le16(listen_ms); 537 ret = brcmf_fil_bsscfg_data_set(ifp, "p2p_state", &discover_state, 538 sizeof(discover_state)); 539 return ret; 540 } 541 542 /** 543 * brcmf_p2p_deinit_discovery() - disable P2P device discovery. 544 * 545 * @p2p: P2P specific data. 546 * 547 * Resets the discovery state and disables it in firmware. 548 */ 549 static s32 brcmf_p2p_deinit_discovery(struct brcmf_p2p_info *p2p) 550 { 551 struct brcmf_cfg80211_vif *vif; 552 553 brcmf_dbg(TRACE, "enter\n"); 554 555 /* Set the discovery state to SCAN */ 556 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif; 557 (void)brcmf_p2p_set_discover_state(vif->ifp, WL_P2P_DISC_ST_SCAN, 0, 0); 558 559 /* Disable P2P discovery in the firmware */ 560 vif = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif; 561 (void)brcmf_fil_iovar_int_set(vif->ifp, "p2p_disc", 0); 562 563 return 0; 564 } 565 566 /** 567 * brcmf_p2p_enable_discovery() - initialize and configure discovery. 568 * 569 * @p2p: P2P specific data. 570 * 571 * Initializes the discovery device and configure the virtual interface. 572 */ 573 static int brcmf_p2p_enable_discovery(struct brcmf_p2p_info *p2p) 574 { 575 struct brcmf_cfg80211_vif *vif; 576 s32 ret = 0; 577 578 brcmf_dbg(TRACE, "enter\n"); 579 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif; 580 if (!vif) { 581 brcmf_err("P2P config device not available\n"); 582 ret = -EPERM; 583 goto exit; 584 } 585 586 if (test_bit(BRCMF_P2P_STATUS_ENABLED, &p2p->status)) { 587 brcmf_dbg(INFO, "P2P config device already configured\n"); 588 goto exit; 589 } 590 591 /* Re-initialize P2P Discovery in the firmware */ 592 vif = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif; 593 ret = brcmf_fil_iovar_int_set(vif->ifp, "p2p_disc", 1); 594 if (ret < 0) { 595 brcmf_err("set p2p_disc error\n"); 596 goto exit; 597 } 598 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif; 599 ret = brcmf_p2p_set_discover_state(vif->ifp, WL_P2P_DISC_ST_SCAN, 0, 0); 600 if (ret < 0) { 601 brcmf_err("unable to set WL_P2P_DISC_ST_SCAN\n"); 602 goto exit; 603 } 604 605 /* 606 * Set wsec to any non-zero value in the discovery bsscfg 607 * to ensure our P2P probe responses have the privacy bit 608 * set in the 802.11 WPA IE. Some peer devices may not 609 * initiate WPS with us if this bit is not set. 610 */ 611 ret = brcmf_fil_bsscfg_int_set(vif->ifp, "wsec", AES_ENABLED); 612 if (ret < 0) { 613 brcmf_err("wsec error %d\n", ret); 614 goto exit; 615 } 616 617 set_bit(BRCMF_P2P_STATUS_ENABLED, &p2p->status); 618 exit: 619 return ret; 620 } 621 622 /** 623 * brcmf_p2p_escan() - initiate a P2P scan. 624 * 625 * @p2p: P2P specific data. 626 * @num_chans: number of channels to scan. 627 * @chanspecs: channel parameters for @num_chans channels. 628 * @search_state: P2P discover state to use. 629 * @bss_type: type of P2P bss. 630 */ 631 static s32 brcmf_p2p_escan(struct brcmf_p2p_info *p2p, u32 num_chans, 632 u16 chanspecs[], s32 search_state, 633 enum p2p_bss_type bss_type) 634 { 635 s32 ret = 0; 636 s32 memsize = offsetof(struct brcmf_p2p_scan_le, 637 eparams.params_le.channel_list); 638 s32 nprobes; 639 s32 active; 640 u32 i; 641 u8 *memblk; 642 struct brcmf_cfg80211_vif *vif; 643 struct brcmf_p2p_scan_le *p2p_params; 644 struct brcmf_scan_params_le *sparams; 645 646 memsize += num_chans * sizeof(__le16); 647 memblk = kzalloc(memsize, GFP_KERNEL); 648 if (!memblk) 649 return -ENOMEM; 650 651 vif = p2p->bss_idx[bss_type].vif; 652 if (vif == NULL) { 653 brcmf_err("no vif for bss type %d\n", bss_type); 654 ret = -EINVAL; 655 goto exit; 656 } 657 p2p_params = (struct brcmf_p2p_scan_le *)memblk; 658 sparams = &p2p_params->eparams.params_le; 659 660 switch (search_state) { 661 case WL_P2P_DISC_ST_SEARCH: 662 /* 663 * If we in SEARCH STATE, we don't need to set SSID explictly 664 * because dongle use P2P WILDCARD internally by default, use 665 * null ssid, which it is already due to kzalloc. 666 */ 667 break; 668 case WL_P2P_DISC_ST_SCAN: 669 /* 670 * wpa_supplicant has p2p_find command with type social or 671 * progressive. For progressive, we need to set the ssid to 672 * P2P WILDCARD because we just do broadcast scan unless 673 * setting SSID. 674 */ 675 sparams->ssid_le.SSID_len = 676 cpu_to_le32(BRCMF_P2P_WILDCARD_SSID_LEN); 677 memcpy(sparams->ssid_le.SSID, BRCMF_P2P_WILDCARD_SSID, 678 BRCMF_P2P_WILDCARD_SSID_LEN); 679 break; 680 default: 681 brcmf_err(" invalid search state %d\n", search_state); 682 ret = -EINVAL; 683 goto exit; 684 } 685 686 brcmf_p2p_set_discover_state(vif->ifp, search_state, 0, 0); 687 688 /* 689 * set p2p scan parameters. 690 */ 691 p2p_params->type = 'E'; 692 693 /* determine the scan engine parameters */ 694 sparams->bss_type = DOT11_BSSTYPE_ANY; 695 if (p2p->cfg->active_scan) 696 sparams->scan_type = 0; 697 else 698 sparams->scan_type = 1; 699 700 eth_broadcast_addr(sparams->bssid); 701 sparams->home_time = cpu_to_le32(P2PAPI_SCAN_HOME_TIME_MS); 702 703 /* 704 * SOCIAL_CHAN_CNT + 1 takes care of the Progressive scan 705 * supported by the supplicant. 706 */ 707 if (num_chans == SOCIAL_CHAN_CNT || num_chans == (SOCIAL_CHAN_CNT + 1)) 708 active = P2PAPI_SCAN_SOCIAL_DWELL_TIME_MS; 709 else if (num_chans == AF_PEER_SEARCH_CNT) 710 active = P2PAPI_SCAN_AF_SEARCH_DWELL_TIME_MS; 711 else if (brcmf_get_vif_state_any(p2p->cfg, BRCMF_VIF_STATUS_CONNECTED)) 712 active = -1; 713 else 714 active = P2PAPI_SCAN_DWELL_TIME_MS; 715 716 /* Override scan params to find a peer for a connection */ 717 if (num_chans == 1) { 718 active = WL_SCAN_CONNECT_DWELL_TIME_MS; 719 /* WAR to sync with presence period of VSDB GO. 720 * send probe request more frequently 721 */ 722 nprobes = active / WL_SCAN_JOIN_PROBE_INTERVAL_MS; 723 } else { 724 nprobes = active / P2PAPI_SCAN_NPROBS_TIME_MS; 725 } 726 727 if (nprobes <= 0) 728 nprobes = 1; 729 730 brcmf_dbg(INFO, "nprobes # %d, active_time %d\n", nprobes, active); 731 sparams->active_time = cpu_to_le32(active); 732 sparams->nprobes = cpu_to_le32(nprobes); 733 sparams->passive_time = cpu_to_le32(-1); 734 sparams->channel_num = cpu_to_le32(num_chans & 735 BRCMF_SCAN_PARAMS_COUNT_MASK); 736 for (i = 0; i < num_chans; i++) 737 sparams->channel_list[i] = cpu_to_le16(chanspecs[i]); 738 739 /* set the escan specific parameters */ 740 p2p_params->eparams.version = cpu_to_le32(BRCMF_ESCAN_REQ_VERSION); 741 p2p_params->eparams.action = cpu_to_le16(WL_ESCAN_ACTION_START); 742 p2p_params->eparams.sync_id = cpu_to_le16(0x1234); 743 /* perform p2p scan on primary device */ 744 ret = brcmf_fil_bsscfg_data_set(vif->ifp, "p2p_scan", memblk, memsize); 745 if (!ret) 746 set_bit(BRCMF_SCAN_STATUS_BUSY, &p2p->cfg->scan_status); 747 exit: 748 kfree(memblk); 749 return ret; 750 } 751 752 /** 753 * brcmf_p2p_run_escan() - escan callback for peer-to-peer. 754 * 755 * @cfg: driver private data for cfg80211 interface. 756 * @ndev: net device for which scan is requested. 757 * @request: scan request from cfg80211. 758 * @action: scan action. 759 * 760 * Determines the P2P discovery state based to scan request parameters and 761 * validates the channels in the request. 762 */ 763 static s32 brcmf_p2p_run_escan(struct brcmf_cfg80211_info *cfg, 764 struct brcmf_if *ifp, 765 struct cfg80211_scan_request *request) 766 { 767 struct brcmf_p2p_info *p2p = &cfg->p2p; 768 s32 err = 0; 769 s32 search_state = WL_P2P_DISC_ST_SCAN; 770 struct brcmf_cfg80211_vif *vif; 771 struct net_device *dev = NULL; 772 int i, num_nodfs = 0; 773 u16 *chanspecs; 774 775 brcmf_dbg(TRACE, "enter\n"); 776 777 if (!request) { 778 err = -EINVAL; 779 goto exit; 780 } 781 782 if (request->n_channels) { 783 chanspecs = kcalloc(request->n_channels, sizeof(*chanspecs), 784 GFP_KERNEL); 785 if (!chanspecs) { 786 err = -ENOMEM; 787 goto exit; 788 } 789 vif = p2p->bss_idx[P2PAPI_BSSCFG_CONNECTION].vif; 790 if (vif) 791 dev = vif->wdev.netdev; 792 if (request->n_channels == 3 && 793 request->channels[0]->hw_value == SOCIAL_CHAN_1 && 794 request->channels[1]->hw_value == SOCIAL_CHAN_2 && 795 request->channels[2]->hw_value == SOCIAL_CHAN_3) { 796 /* SOCIAL CHANNELS 1, 6, 11 */ 797 search_state = WL_P2P_DISC_ST_SEARCH; 798 brcmf_dbg(INFO, "P2P SEARCH PHASE START\n"); 799 } else if (dev != NULL && 800 vif->wdev.iftype == NL80211_IFTYPE_P2P_GO) { 801 /* If you are already a GO, then do SEARCH only */ 802 brcmf_dbg(INFO, "Already a GO. Do SEARCH Only\n"); 803 search_state = WL_P2P_DISC_ST_SEARCH; 804 } else { 805 brcmf_dbg(INFO, "P2P SCAN STATE START\n"); 806 } 807 808 /* 809 * no P2P scanning on passive or DFS channels. 810 */ 811 for (i = 0; i < request->n_channels; i++) { 812 struct ieee80211_channel *chan = request->channels[i]; 813 814 if (chan->flags & (IEEE80211_CHAN_RADAR | 815 IEEE80211_CHAN_NO_IR)) 816 continue; 817 818 chanspecs[i] = channel_to_chanspec(&p2p->cfg->d11inf, 819 chan); 820 brcmf_dbg(INFO, "%d: chan=%d, channel spec=%x\n", 821 num_nodfs, chan->hw_value, chanspecs[i]); 822 num_nodfs++; 823 } 824 err = brcmf_p2p_escan(p2p, num_nodfs, chanspecs, search_state, 825 P2PAPI_BSSCFG_DEVICE); 826 kfree(chanspecs); 827 } 828 exit: 829 if (err) 830 brcmf_err("error (%d)\n", err); 831 return err; 832 } 833 834 835 /** 836 * brcmf_p2p_find_listen_channel() - find listen channel in ie string. 837 * 838 * @ie: string of information elements. 839 * @ie_len: length of string. 840 * 841 * Scan ie for p2p ie and look for attribute 6 channel. If available determine 842 * channel and return it. 843 */ 844 static s32 brcmf_p2p_find_listen_channel(const u8 *ie, u32 ie_len) 845 { 846 u8 channel_ie[5]; 847 s32 listen_channel; 848 s32 err; 849 850 err = cfg80211_get_p2p_attr(ie, ie_len, 851 IEEE80211_P2P_ATTR_LISTEN_CHANNEL, 852 channel_ie, sizeof(channel_ie)); 853 if (err < 0) 854 return err; 855 856 /* listen channel subel length format: */ 857 /* 3(country) + 1(op. class) + 1(chan num) */ 858 listen_channel = (s32)channel_ie[3 + 1]; 859 860 if (listen_channel == SOCIAL_CHAN_1 || 861 listen_channel == SOCIAL_CHAN_2 || 862 listen_channel == SOCIAL_CHAN_3) { 863 brcmf_dbg(INFO, "Found my Listen Channel %d\n", listen_channel); 864 return listen_channel; 865 } 866 867 return -EPERM; 868 } 869 870 871 /** 872 * brcmf_p2p_scan_prep() - prepare scan based on request. 873 * 874 * @wiphy: wiphy device. 875 * @request: scan request from cfg80211. 876 * @vif: vif on which scan request is to be executed. 877 * 878 * Prepare the scan appropriately for type of scan requested. Overrides the 879 * escan .run() callback for peer-to-peer scanning. 880 */ 881 int brcmf_p2p_scan_prep(struct wiphy *wiphy, 882 struct cfg80211_scan_request *request, 883 struct brcmf_cfg80211_vif *vif) 884 { 885 struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy); 886 struct brcmf_p2p_info *p2p = &cfg->p2p; 887 int err = 0; 888 889 if (brcmf_p2p_scan_is_p2p_request(request)) { 890 /* find my listen channel */ 891 err = brcmf_p2p_find_listen_channel(request->ie, 892 request->ie_len); 893 if (err < 0) 894 return err; 895 896 p2p->afx_hdl.my_listen_chan = err; 897 898 clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status); 899 brcmf_dbg(INFO, "P2P: GO_NEG_PHASE status cleared\n"); 900 901 err = brcmf_p2p_enable_discovery(p2p); 902 if (err) 903 return err; 904 905 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif; 906 907 /* override .run_escan() callback. */ 908 cfg->escan_info.run = brcmf_p2p_run_escan; 909 } 910 err = brcmf_vif_set_mgmt_ie(vif, BRCMF_VNDR_IE_PRBREQ_FLAG, 911 request->ie, request->ie_len); 912 return err; 913 } 914 915 916 /** 917 * brcmf_p2p_discover_listen() - set firmware to discover listen state. 918 * 919 * @p2p: p2p device. 920 * @channel: channel nr for discover listen. 921 * @duration: time in ms to stay on channel. 922 * 923 */ 924 static s32 925 brcmf_p2p_discover_listen(struct brcmf_p2p_info *p2p, u16 channel, u32 duration) 926 { 927 struct brcmf_cfg80211_vif *vif; 928 struct brcmu_chan ch; 929 s32 err = 0; 930 931 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif; 932 if (!vif) { 933 brcmf_err("Discovery is not set, so we have nothing to do\n"); 934 err = -EPERM; 935 goto exit; 936 } 937 938 if (test_bit(BRCMF_P2P_STATUS_DISCOVER_LISTEN, &p2p->status)) { 939 brcmf_err("Previous LISTEN is not completed yet\n"); 940 /* WAR: prevent cookie mismatch in wpa_supplicant return OK */ 941 goto exit; 942 } 943 944 ch.chnum = channel; 945 ch.bw = BRCMU_CHAN_BW_20; 946 p2p->cfg->d11inf.encchspec(&ch); 947 err = brcmf_p2p_set_discover_state(vif->ifp, WL_P2P_DISC_ST_LISTEN, 948 ch.chspec, (u16)duration); 949 if (!err) { 950 set_bit(BRCMF_P2P_STATUS_DISCOVER_LISTEN, &p2p->status); 951 p2p->remain_on_channel_cookie++; 952 } 953 exit: 954 return err; 955 } 956 957 958 /** 959 * brcmf_p2p_remain_on_channel() - put device on channel and stay there. 960 * 961 * @wiphy: wiphy device. 962 * @channel: channel to stay on. 963 * @duration: time in ms to remain on channel. 964 * 965 */ 966 int brcmf_p2p_remain_on_channel(struct wiphy *wiphy, struct wireless_dev *wdev, 967 struct ieee80211_channel *channel, 968 unsigned int duration, u64 *cookie) 969 { 970 struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy); 971 struct brcmf_p2p_info *p2p = &cfg->p2p; 972 s32 err; 973 u16 channel_nr; 974 975 channel_nr = ieee80211_frequency_to_channel(channel->center_freq); 976 brcmf_dbg(TRACE, "Enter, channel: %d, duration ms (%d)\n", channel_nr, 977 duration); 978 979 err = brcmf_p2p_enable_discovery(p2p); 980 if (err) 981 goto exit; 982 err = brcmf_p2p_discover_listen(p2p, channel_nr, duration); 983 if (err) 984 goto exit; 985 986 memcpy(&p2p->remain_on_channel, channel, sizeof(*channel)); 987 *cookie = p2p->remain_on_channel_cookie; 988 cfg80211_ready_on_channel(wdev, *cookie, channel, duration, GFP_KERNEL); 989 990 exit: 991 return err; 992 } 993 994 995 /** 996 * brcmf_p2p_notify_listen_complete() - p2p listen has completed. 997 * 998 * @ifp: interfac control. 999 * @e: event message. Not used, to make it usable for fweh event dispatcher. 1000 * @data: payload of message. Not used. 1001 * 1002 */ 1003 int brcmf_p2p_notify_listen_complete(struct brcmf_if *ifp, 1004 const struct brcmf_event_msg *e, 1005 void *data) 1006 { 1007 struct brcmf_cfg80211_info *cfg = ifp->drvr->config; 1008 struct brcmf_p2p_info *p2p = &cfg->p2p; 1009 1010 brcmf_dbg(TRACE, "Enter\n"); 1011 if (test_and_clear_bit(BRCMF_P2P_STATUS_DISCOVER_LISTEN, 1012 &p2p->status)) { 1013 if (test_and_clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_AF_LISTEN, 1014 &p2p->status)) { 1015 clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, 1016 &p2p->status); 1017 brcmf_dbg(INFO, "Listen DONE, wake up wait_next_af\n"); 1018 complete(&p2p->wait_next_af); 1019 } 1020 1021 cfg80211_remain_on_channel_expired(&ifp->vif->wdev, 1022 p2p->remain_on_channel_cookie, 1023 &p2p->remain_on_channel, 1024 GFP_KERNEL); 1025 } 1026 return 0; 1027 } 1028 1029 1030 /** 1031 * brcmf_p2p_cancel_remain_on_channel() - cancel p2p listen state. 1032 * 1033 * @ifp: interfac control. 1034 * 1035 */ 1036 void brcmf_p2p_cancel_remain_on_channel(struct brcmf_if *ifp) 1037 { 1038 if (!ifp) 1039 return; 1040 brcmf_p2p_set_discover_state(ifp, WL_P2P_DISC_ST_SCAN, 0, 0); 1041 brcmf_p2p_notify_listen_complete(ifp, NULL, NULL); 1042 } 1043 1044 1045 /** 1046 * brcmf_p2p_act_frm_search() - search function for action frame. 1047 * 1048 * @p2p: p2p device. 1049 * channel: channel on which action frame is to be trasmitted. 1050 * 1051 * search function to reach at common channel to send action frame. When 1052 * channel is 0 then all social channels will be used to send af 1053 */ 1054 static s32 brcmf_p2p_act_frm_search(struct brcmf_p2p_info *p2p, u16 channel) 1055 { 1056 s32 err; 1057 u32 channel_cnt; 1058 u16 *default_chan_list; 1059 u32 i; 1060 struct brcmu_chan ch; 1061 1062 brcmf_dbg(TRACE, "Enter\n"); 1063 1064 if (channel) 1065 channel_cnt = AF_PEER_SEARCH_CNT; 1066 else 1067 channel_cnt = SOCIAL_CHAN_CNT; 1068 default_chan_list = kzalloc(channel_cnt * sizeof(*default_chan_list), 1069 GFP_KERNEL); 1070 if (default_chan_list == NULL) { 1071 brcmf_err("channel list allocation failed\n"); 1072 err = -ENOMEM; 1073 goto exit; 1074 } 1075 ch.bw = BRCMU_CHAN_BW_20; 1076 if (channel) { 1077 ch.chnum = channel; 1078 p2p->cfg->d11inf.encchspec(&ch); 1079 /* insert same channel to the chan_list */ 1080 for (i = 0; i < channel_cnt; i++) 1081 default_chan_list[i] = ch.chspec; 1082 } else { 1083 ch.chnum = SOCIAL_CHAN_1; 1084 p2p->cfg->d11inf.encchspec(&ch); 1085 default_chan_list[0] = ch.chspec; 1086 ch.chnum = SOCIAL_CHAN_2; 1087 p2p->cfg->d11inf.encchspec(&ch); 1088 default_chan_list[1] = ch.chspec; 1089 ch.chnum = SOCIAL_CHAN_3; 1090 p2p->cfg->d11inf.encchspec(&ch); 1091 default_chan_list[2] = ch.chspec; 1092 } 1093 err = brcmf_p2p_escan(p2p, channel_cnt, default_chan_list, 1094 WL_P2P_DISC_ST_SEARCH, P2PAPI_BSSCFG_DEVICE); 1095 kfree(default_chan_list); 1096 exit: 1097 return err; 1098 } 1099 1100 1101 /** 1102 * brcmf_p2p_afx_handler() - afx worker thread. 1103 * 1104 * @work: 1105 * 1106 */ 1107 static void brcmf_p2p_afx_handler(struct work_struct *work) 1108 { 1109 struct afx_hdl *afx_hdl = container_of(work, struct afx_hdl, afx_work); 1110 struct brcmf_p2p_info *p2p = container_of(afx_hdl, 1111 struct brcmf_p2p_info, 1112 afx_hdl); 1113 s32 err; 1114 1115 if (!afx_hdl->is_active) 1116 return; 1117 1118 if (afx_hdl->is_listen && afx_hdl->my_listen_chan) 1119 /* 100ms ~ 300ms */ 1120 err = brcmf_p2p_discover_listen(p2p, afx_hdl->my_listen_chan, 1121 100 * (1 + prandom_u32() % 3)); 1122 else 1123 err = brcmf_p2p_act_frm_search(p2p, afx_hdl->peer_listen_chan); 1124 1125 if (err) { 1126 brcmf_err("ERROR occurred! value is (%d)\n", err); 1127 if (test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, 1128 &p2p->status)) 1129 complete(&afx_hdl->act_frm_scan); 1130 } 1131 } 1132 1133 1134 /** 1135 * brcmf_p2p_af_searching_channel() - search channel. 1136 * 1137 * @p2p: p2p device info struct. 1138 * 1139 */ 1140 static s32 brcmf_p2p_af_searching_channel(struct brcmf_p2p_info *p2p) 1141 { 1142 struct afx_hdl *afx_hdl = &p2p->afx_hdl; 1143 struct brcmf_cfg80211_vif *pri_vif; 1144 unsigned long duration; 1145 s32 retry; 1146 1147 brcmf_dbg(TRACE, "Enter\n"); 1148 1149 pri_vif = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif; 1150 1151 reinit_completion(&afx_hdl->act_frm_scan); 1152 set_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status); 1153 afx_hdl->is_active = true; 1154 afx_hdl->peer_chan = P2P_INVALID_CHANNEL; 1155 1156 /* Loop to wait until we find a peer's channel or the 1157 * pending action frame tx is cancelled. 1158 */ 1159 retry = 0; 1160 duration = msecs_to_jiffies(P2P_AF_FRM_SCAN_MAX_WAIT); 1161 while ((retry < P2P_CHANNEL_SYNC_RETRY) && 1162 (afx_hdl->peer_chan == P2P_INVALID_CHANNEL)) { 1163 afx_hdl->is_listen = false; 1164 brcmf_dbg(TRACE, "Scheduling action frame for sending.. (%d)\n", 1165 retry); 1166 /* search peer on peer's listen channel */ 1167 schedule_work(&afx_hdl->afx_work); 1168 wait_for_completion_timeout(&afx_hdl->act_frm_scan, duration); 1169 if ((afx_hdl->peer_chan != P2P_INVALID_CHANNEL) || 1170 (!test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, 1171 &p2p->status))) 1172 break; 1173 1174 if (afx_hdl->my_listen_chan) { 1175 brcmf_dbg(TRACE, "Scheduling listen peer, channel=%d\n", 1176 afx_hdl->my_listen_chan); 1177 /* listen on my listen channel */ 1178 afx_hdl->is_listen = true; 1179 schedule_work(&afx_hdl->afx_work); 1180 wait_for_completion_timeout(&afx_hdl->act_frm_scan, 1181 duration); 1182 } 1183 if ((afx_hdl->peer_chan != P2P_INVALID_CHANNEL) || 1184 (!test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, 1185 &p2p->status))) 1186 break; 1187 retry++; 1188 1189 /* if sta is connected or connecting, sleep for a while before 1190 * retry af tx or finding a peer 1191 */ 1192 if (test_bit(BRCMF_VIF_STATUS_CONNECTED, &pri_vif->sme_state) || 1193 test_bit(BRCMF_VIF_STATUS_CONNECTING, &pri_vif->sme_state)) 1194 msleep(P2P_DEFAULT_SLEEP_TIME_VSDB); 1195 } 1196 1197 brcmf_dbg(TRACE, "Completed search/listen peer_chan=%d\n", 1198 afx_hdl->peer_chan); 1199 afx_hdl->is_active = false; 1200 1201 clear_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status); 1202 1203 return afx_hdl->peer_chan; 1204 } 1205 1206 1207 /** 1208 * brcmf_p2p_scan_finding_common_channel() - was escan used for finding channel 1209 * 1210 * @cfg: common configuration struct. 1211 * @bi: bss info struct, result from scan. 1212 * 1213 */ 1214 bool brcmf_p2p_scan_finding_common_channel(struct brcmf_cfg80211_info *cfg, 1215 struct brcmf_bss_info_le *bi) 1216 1217 { 1218 struct brcmf_p2p_info *p2p = &cfg->p2p; 1219 struct afx_hdl *afx_hdl = &p2p->afx_hdl; 1220 struct brcmu_chan ch; 1221 u8 *ie; 1222 s32 err; 1223 u8 p2p_dev_addr[ETH_ALEN]; 1224 1225 if (!test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status)) 1226 return false; 1227 1228 if (bi == NULL) { 1229 brcmf_dbg(TRACE, "ACTION FRAME SCAN Done\n"); 1230 if (afx_hdl->peer_chan == P2P_INVALID_CHANNEL) 1231 complete(&afx_hdl->act_frm_scan); 1232 return true; 1233 } 1234 1235 ie = ((u8 *)bi) + le16_to_cpu(bi->ie_offset); 1236 memset(p2p_dev_addr, 0, sizeof(p2p_dev_addr)); 1237 err = cfg80211_get_p2p_attr(ie, le32_to_cpu(bi->ie_length), 1238 IEEE80211_P2P_ATTR_DEVICE_INFO, 1239 p2p_dev_addr, sizeof(p2p_dev_addr)); 1240 if (err < 0) 1241 err = cfg80211_get_p2p_attr(ie, le32_to_cpu(bi->ie_length), 1242 IEEE80211_P2P_ATTR_DEVICE_ID, 1243 p2p_dev_addr, sizeof(p2p_dev_addr)); 1244 if ((err >= 0) && 1245 (ether_addr_equal(p2p_dev_addr, afx_hdl->tx_dst_addr))) { 1246 if (!bi->ctl_ch) { 1247 ch.chspec = le16_to_cpu(bi->chanspec); 1248 cfg->d11inf.decchspec(&ch); 1249 bi->ctl_ch = ch.control_ch_num; 1250 } 1251 afx_hdl->peer_chan = bi->ctl_ch; 1252 brcmf_dbg(TRACE, "ACTION FRAME SCAN : Peer %pM found, channel : %d\n", 1253 afx_hdl->tx_dst_addr, afx_hdl->peer_chan); 1254 complete(&afx_hdl->act_frm_scan); 1255 } 1256 return true; 1257 } 1258 1259 /** 1260 * brcmf_p2p_stop_wait_next_action_frame() - finish scan if af tx complete. 1261 * 1262 * @cfg: common configuration struct. 1263 * 1264 */ 1265 static void 1266 brcmf_p2p_stop_wait_next_action_frame(struct brcmf_cfg80211_info *cfg) 1267 { 1268 struct brcmf_p2p_info *p2p = &cfg->p2p; 1269 struct brcmf_if *ifp = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->ifp; 1270 1271 if (test_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status) && 1272 (test_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status) || 1273 test_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status))) { 1274 brcmf_dbg(TRACE, "*** Wake UP ** abort actframe iovar\n"); 1275 /* if channel is not zero, "actfame" uses off channel scan. 1276 * So abort scan for off channel completion. 1277 */ 1278 if (p2p->af_sent_channel) 1279 brcmf_notify_escan_complete(cfg, ifp, true, true); 1280 } else if (test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_AF_LISTEN, 1281 &p2p->status)) { 1282 brcmf_dbg(TRACE, "*** Wake UP ** abort listen for next af frame\n"); 1283 /* So abort scan to cancel listen */ 1284 brcmf_notify_escan_complete(cfg, ifp, true, true); 1285 } 1286 } 1287 1288 1289 /** 1290 * brcmf_p2p_gon_req_collision() - Check if go negotiaton collission 1291 * 1292 * @p2p: p2p device info struct. 1293 * 1294 * return true if recevied action frame is to be dropped. 1295 */ 1296 static bool 1297 brcmf_p2p_gon_req_collision(struct brcmf_p2p_info *p2p, u8 *mac) 1298 { 1299 struct brcmf_cfg80211_info *cfg = p2p->cfg; 1300 struct brcmf_if *ifp; 1301 1302 brcmf_dbg(TRACE, "Enter\n"); 1303 1304 if (!test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status) || 1305 !p2p->gon_req_action) 1306 return false; 1307 1308 brcmf_dbg(TRACE, "GO Negotiation Request COLLISION !!!\n"); 1309 /* if sa(peer) addr is less than da(my) addr, then this device 1310 * process peer's gon request and block to send gon req. 1311 * if not (sa addr > da addr), 1312 * this device will process gon request and drop gon req of peer. 1313 */ 1314 ifp = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif->ifp; 1315 if (memcmp(mac, ifp->mac_addr, ETH_ALEN) < 0) { 1316 brcmf_dbg(INFO, "Block transmit gon req !!!\n"); 1317 p2p->block_gon_req_tx = true; 1318 /* if we are finding a common channel for sending af, 1319 * do not scan more to block to send current gon req 1320 */ 1321 if (test_and_clear_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, 1322 &p2p->status)) 1323 complete(&p2p->afx_hdl.act_frm_scan); 1324 if (test_and_clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, 1325 &p2p->status)) 1326 brcmf_p2p_stop_wait_next_action_frame(cfg); 1327 return false; 1328 } 1329 1330 /* drop gon request of peer to process gon request by this device. */ 1331 brcmf_dbg(INFO, "Drop received gon req !!!\n"); 1332 1333 return true; 1334 } 1335 1336 1337 /** 1338 * brcmf_p2p_notify_action_frame_rx() - received action frame. 1339 * 1340 * @ifp: interfac control. 1341 * @e: event message. Not used, to make it usable for fweh event dispatcher. 1342 * @data: payload of message, containing action frame data. 1343 * 1344 */ 1345 int brcmf_p2p_notify_action_frame_rx(struct brcmf_if *ifp, 1346 const struct brcmf_event_msg *e, 1347 void *data) 1348 { 1349 struct brcmf_cfg80211_info *cfg = ifp->drvr->config; 1350 struct brcmf_p2p_info *p2p = &cfg->p2p; 1351 struct afx_hdl *afx_hdl = &p2p->afx_hdl; 1352 struct wireless_dev *wdev; 1353 u32 mgmt_frame_len = e->datalen - sizeof(struct brcmf_rx_mgmt_data); 1354 struct brcmf_rx_mgmt_data *rxframe = (struct brcmf_rx_mgmt_data *)data; 1355 u8 *frame = (u8 *)(rxframe + 1); 1356 struct brcmf_p2p_pub_act_frame *act_frm; 1357 struct brcmf_p2psd_gas_pub_act_frame *sd_act_frm; 1358 struct brcmu_chan ch; 1359 struct ieee80211_mgmt *mgmt_frame; 1360 s32 freq; 1361 u16 mgmt_type; 1362 u8 action; 1363 1364 if (e->datalen < sizeof(*rxframe)) { 1365 brcmf_dbg(SCAN, "Event data to small. Ignore\n"); 1366 return 0; 1367 } 1368 1369 ch.chspec = be16_to_cpu(rxframe->chanspec); 1370 cfg->d11inf.decchspec(&ch); 1371 /* Check if wpa_supplicant has registered for this frame */ 1372 brcmf_dbg(INFO, "ifp->vif->mgmt_rx_reg %04x\n", ifp->vif->mgmt_rx_reg); 1373 mgmt_type = (IEEE80211_STYPE_ACTION & IEEE80211_FCTL_STYPE) >> 4; 1374 if ((ifp->vif->mgmt_rx_reg & BIT(mgmt_type)) == 0) 1375 return 0; 1376 1377 brcmf_p2p_print_actframe(false, frame, mgmt_frame_len); 1378 1379 action = P2P_PAF_SUBTYPE_INVALID; 1380 if (brcmf_p2p_is_pub_action(frame, mgmt_frame_len)) { 1381 act_frm = (struct brcmf_p2p_pub_act_frame *)frame; 1382 action = act_frm->subtype; 1383 if ((action == P2P_PAF_GON_REQ) && 1384 (brcmf_p2p_gon_req_collision(p2p, (u8 *)e->addr))) { 1385 if (test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, 1386 &p2p->status) && 1387 (ether_addr_equal(afx_hdl->tx_dst_addr, e->addr))) { 1388 afx_hdl->peer_chan = ch.control_ch_num; 1389 brcmf_dbg(INFO, "GON request: Peer found, channel=%d\n", 1390 afx_hdl->peer_chan); 1391 complete(&afx_hdl->act_frm_scan); 1392 } 1393 return 0; 1394 } 1395 /* After complete GO Negotiation, roll back to mpc mode */ 1396 if ((action == P2P_PAF_GON_CONF) || 1397 (action == P2P_PAF_PROVDIS_RSP)) 1398 brcmf_set_mpc(ifp, 1); 1399 if (action == P2P_PAF_GON_CONF) { 1400 brcmf_dbg(TRACE, "P2P: GO_NEG_PHASE status cleared\n"); 1401 clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status); 1402 } 1403 } else if (brcmf_p2p_is_gas_action(frame, mgmt_frame_len)) { 1404 sd_act_frm = (struct brcmf_p2psd_gas_pub_act_frame *)frame; 1405 action = sd_act_frm->action; 1406 } 1407 1408 if (test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status) && 1409 (p2p->next_af_subtype == action)) { 1410 brcmf_dbg(TRACE, "We got a right next frame! (%d)\n", action); 1411 clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, 1412 &p2p->status); 1413 /* Stop waiting for next AF. */ 1414 brcmf_p2p_stop_wait_next_action_frame(cfg); 1415 } 1416 1417 mgmt_frame = kzalloc(offsetof(struct ieee80211_mgmt, u) + 1418 mgmt_frame_len, GFP_KERNEL); 1419 if (!mgmt_frame) { 1420 brcmf_err("No memory available for action frame\n"); 1421 return -ENOMEM; 1422 } 1423 memcpy(mgmt_frame->da, ifp->mac_addr, ETH_ALEN); 1424 brcmf_fil_cmd_data_get(ifp, BRCMF_C_GET_BSSID, mgmt_frame->bssid, 1425 ETH_ALEN); 1426 memcpy(mgmt_frame->sa, e->addr, ETH_ALEN); 1427 mgmt_frame->frame_control = cpu_to_le16(IEEE80211_STYPE_ACTION); 1428 memcpy(&mgmt_frame->u, frame, mgmt_frame_len); 1429 mgmt_frame_len += offsetof(struct ieee80211_mgmt, u); 1430 1431 freq = ieee80211_channel_to_frequency(ch.control_ch_num, 1432 ch.band == BRCMU_CHAN_BAND_2G ? 1433 NL80211_BAND_2GHZ : 1434 NL80211_BAND_5GHZ); 1435 1436 wdev = &ifp->vif->wdev; 1437 cfg80211_rx_mgmt(wdev, freq, 0, (u8 *)mgmt_frame, mgmt_frame_len, 0); 1438 1439 kfree(mgmt_frame); 1440 return 0; 1441 } 1442 1443 1444 /** 1445 * brcmf_p2p_notify_action_tx_complete() - transmit action frame complete 1446 * 1447 * @ifp: interfac control. 1448 * @e: event message. Not used, to make it usable for fweh event dispatcher. 1449 * @data: not used. 1450 * 1451 */ 1452 int brcmf_p2p_notify_action_tx_complete(struct brcmf_if *ifp, 1453 const struct brcmf_event_msg *e, 1454 void *data) 1455 { 1456 struct brcmf_cfg80211_info *cfg = ifp->drvr->config; 1457 struct brcmf_p2p_info *p2p = &cfg->p2p; 1458 1459 brcmf_dbg(INFO, "Enter: event %s, status=%d\n", 1460 e->event_code == BRCMF_E_ACTION_FRAME_OFF_CHAN_COMPLETE ? 1461 "ACTION_FRAME_OFF_CHAN_COMPLETE" : "ACTION_FRAME_COMPLETE", 1462 e->status); 1463 1464 if (!test_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status)) 1465 return 0; 1466 1467 if (e->event_code == BRCMF_E_ACTION_FRAME_COMPLETE) { 1468 if (e->status == BRCMF_E_STATUS_SUCCESS) 1469 set_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, 1470 &p2p->status); 1471 else { 1472 set_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status); 1473 /* If there is no ack, we don't need to wait for 1474 * WLC_E_ACTION_FRAME_OFFCHAN_COMPLETE event 1475 */ 1476 brcmf_p2p_stop_wait_next_action_frame(cfg); 1477 } 1478 1479 } else { 1480 complete(&p2p->send_af_done); 1481 } 1482 return 0; 1483 } 1484 1485 1486 /** 1487 * brcmf_p2p_tx_action_frame() - send action frame over fil. 1488 * 1489 * @p2p: p2p info struct for vif. 1490 * @af_params: action frame data/info. 1491 * 1492 * Send an action frame immediately without doing channel synchronization. 1493 * 1494 * This function waits for a completion event before returning. 1495 * The WLC_E_ACTION_FRAME_COMPLETE event will be received when the action 1496 * frame is transmitted. 1497 */ 1498 static s32 brcmf_p2p_tx_action_frame(struct brcmf_p2p_info *p2p, 1499 struct brcmf_fil_af_params_le *af_params) 1500 { 1501 struct brcmf_cfg80211_vif *vif; 1502 s32 err = 0; 1503 s32 timeout = 0; 1504 1505 brcmf_dbg(TRACE, "Enter\n"); 1506 1507 reinit_completion(&p2p->send_af_done); 1508 clear_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status); 1509 clear_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status); 1510 1511 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif; 1512 err = brcmf_fil_bsscfg_data_set(vif->ifp, "actframe", af_params, 1513 sizeof(*af_params)); 1514 if (err) { 1515 brcmf_err(" sending action frame has failed\n"); 1516 goto exit; 1517 } 1518 1519 p2p->af_sent_channel = le32_to_cpu(af_params->channel); 1520 p2p->af_tx_sent_jiffies = jiffies; 1521 1522 timeout = wait_for_completion_timeout(&p2p->send_af_done, 1523 P2P_AF_MAX_WAIT_TIME); 1524 1525 if (test_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status)) { 1526 brcmf_dbg(TRACE, "TX action frame operation is success\n"); 1527 } else { 1528 err = -EIO; 1529 brcmf_dbg(TRACE, "TX action frame operation has failed\n"); 1530 } 1531 /* clear status bit for action tx */ 1532 clear_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status); 1533 clear_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status); 1534 1535 exit: 1536 return err; 1537 } 1538 1539 1540 /** 1541 * brcmf_p2p_pub_af_tx() - public action frame tx routine. 1542 * 1543 * @cfg: driver private data for cfg80211 interface. 1544 * @af_params: action frame data/info. 1545 * @config_af_params: configuration data for action frame. 1546 * 1547 * routine which transmits ation frame public type. 1548 */ 1549 static s32 brcmf_p2p_pub_af_tx(struct brcmf_cfg80211_info *cfg, 1550 struct brcmf_fil_af_params_le *af_params, 1551 struct brcmf_config_af_params *config_af_params) 1552 { 1553 struct brcmf_p2p_info *p2p = &cfg->p2p; 1554 struct brcmf_fil_action_frame_le *action_frame; 1555 struct brcmf_p2p_pub_act_frame *act_frm; 1556 s32 err = 0; 1557 u16 ie_len; 1558 1559 action_frame = &af_params->action_frame; 1560 act_frm = (struct brcmf_p2p_pub_act_frame *)(action_frame->data); 1561 1562 config_af_params->extra_listen = true; 1563 1564 switch (act_frm->subtype) { 1565 case P2P_PAF_GON_REQ: 1566 brcmf_dbg(TRACE, "P2P: GO_NEG_PHASE status set\n"); 1567 set_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status); 1568 config_af_params->mpc_onoff = 0; 1569 config_af_params->search_channel = true; 1570 p2p->next_af_subtype = act_frm->subtype + 1; 1571 p2p->gon_req_action = true; 1572 /* increase dwell time to wait for RESP frame */ 1573 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME); 1574 break; 1575 case P2P_PAF_GON_RSP: 1576 p2p->next_af_subtype = act_frm->subtype + 1; 1577 /* increase dwell time to wait for CONF frame */ 1578 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME); 1579 break; 1580 case P2P_PAF_GON_CONF: 1581 /* If we reached till GO Neg confirmation reset the filter */ 1582 brcmf_dbg(TRACE, "P2P: GO_NEG_PHASE status cleared\n"); 1583 clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status); 1584 /* turn on mpc again if go nego is done */ 1585 config_af_params->mpc_onoff = 1; 1586 /* minimize dwell time */ 1587 af_params->dwell_time = cpu_to_le32(P2P_AF_MIN_DWELL_TIME); 1588 config_af_params->extra_listen = false; 1589 break; 1590 case P2P_PAF_INVITE_REQ: 1591 config_af_params->search_channel = true; 1592 p2p->next_af_subtype = act_frm->subtype + 1; 1593 /* increase dwell time */ 1594 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME); 1595 break; 1596 case P2P_PAF_INVITE_RSP: 1597 /* minimize dwell time */ 1598 af_params->dwell_time = cpu_to_le32(P2P_AF_MIN_DWELL_TIME); 1599 config_af_params->extra_listen = false; 1600 break; 1601 case P2P_PAF_DEVDIS_REQ: 1602 config_af_params->search_channel = true; 1603 p2p->next_af_subtype = act_frm->subtype + 1; 1604 /* maximize dwell time to wait for RESP frame */ 1605 af_params->dwell_time = cpu_to_le32(P2P_AF_LONG_DWELL_TIME); 1606 break; 1607 case P2P_PAF_DEVDIS_RSP: 1608 /* minimize dwell time */ 1609 af_params->dwell_time = cpu_to_le32(P2P_AF_MIN_DWELL_TIME); 1610 config_af_params->extra_listen = false; 1611 break; 1612 case P2P_PAF_PROVDIS_REQ: 1613 ie_len = le16_to_cpu(action_frame->len) - 1614 offsetof(struct brcmf_p2p_pub_act_frame, elts); 1615 if (cfg80211_get_p2p_attr(&act_frm->elts[0], ie_len, 1616 IEEE80211_P2P_ATTR_GROUP_ID, 1617 NULL, 0) < 0) 1618 config_af_params->search_channel = true; 1619 config_af_params->mpc_onoff = 0; 1620 p2p->next_af_subtype = act_frm->subtype + 1; 1621 /* increase dwell time to wait for RESP frame */ 1622 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME); 1623 break; 1624 case P2P_PAF_PROVDIS_RSP: 1625 /* wpa_supplicant send go nego req right after prov disc */ 1626 p2p->next_af_subtype = P2P_PAF_GON_REQ; 1627 /* increase dwell time to MED level */ 1628 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME); 1629 config_af_params->extra_listen = false; 1630 break; 1631 default: 1632 brcmf_err("Unknown p2p pub act frame subtype: %d\n", 1633 act_frm->subtype); 1634 err = -EINVAL; 1635 } 1636 return err; 1637 } 1638 1639 /** 1640 * brcmf_p2p_send_action_frame() - send action frame . 1641 * 1642 * @cfg: driver private data for cfg80211 interface. 1643 * @ndev: net device to transmit on. 1644 * @af_params: configuration data for action frame. 1645 */ 1646 bool brcmf_p2p_send_action_frame(struct brcmf_cfg80211_info *cfg, 1647 struct net_device *ndev, 1648 struct brcmf_fil_af_params_le *af_params) 1649 { 1650 struct brcmf_p2p_info *p2p = &cfg->p2p; 1651 struct brcmf_if *ifp = netdev_priv(ndev); 1652 struct brcmf_fil_action_frame_le *action_frame; 1653 struct brcmf_config_af_params config_af_params; 1654 struct afx_hdl *afx_hdl = &p2p->afx_hdl; 1655 u16 action_frame_len; 1656 bool ack = false; 1657 u8 category; 1658 u8 action; 1659 s32 tx_retry; 1660 s32 extra_listen_time; 1661 uint delta_ms; 1662 1663 action_frame = &af_params->action_frame; 1664 action_frame_len = le16_to_cpu(action_frame->len); 1665 1666 brcmf_p2p_print_actframe(true, action_frame->data, action_frame_len); 1667 1668 /* Add the default dwell time. Dwell time to stay off-channel */ 1669 /* to wait for a response action frame after transmitting an */ 1670 /* GO Negotiation action frame */ 1671 af_params->dwell_time = cpu_to_le32(P2P_AF_DWELL_TIME); 1672 1673 category = action_frame->data[DOT11_ACTION_CAT_OFF]; 1674 action = action_frame->data[DOT11_ACTION_ACT_OFF]; 1675 1676 /* initialize variables */ 1677 p2p->next_af_subtype = P2P_PAF_SUBTYPE_INVALID; 1678 p2p->gon_req_action = false; 1679 1680 /* config parameters */ 1681 config_af_params.mpc_onoff = -1; 1682 config_af_params.search_channel = false; 1683 config_af_params.extra_listen = false; 1684 1685 if (brcmf_p2p_is_pub_action(action_frame->data, action_frame_len)) { 1686 /* p2p public action frame process */ 1687 if (brcmf_p2p_pub_af_tx(cfg, af_params, &config_af_params)) { 1688 /* Just send unknown subtype frame with */ 1689 /* default parameters. */ 1690 brcmf_err("P2P Public action frame, unknown subtype.\n"); 1691 } 1692 } else if (brcmf_p2p_is_gas_action(action_frame->data, 1693 action_frame_len)) { 1694 /* service discovery process */ 1695 if (action == P2PSD_ACTION_ID_GAS_IREQ || 1696 action == P2PSD_ACTION_ID_GAS_CREQ) { 1697 /* configure service discovery query frame */ 1698 config_af_params.search_channel = true; 1699 1700 /* save next af suptype to cancel */ 1701 /* remaining dwell time */ 1702 p2p->next_af_subtype = action + 1; 1703 1704 af_params->dwell_time = 1705 cpu_to_le32(P2P_AF_MED_DWELL_TIME); 1706 } else if (action == P2PSD_ACTION_ID_GAS_IRESP || 1707 action == P2PSD_ACTION_ID_GAS_CRESP) { 1708 /* configure service discovery response frame */ 1709 af_params->dwell_time = 1710 cpu_to_le32(P2P_AF_MIN_DWELL_TIME); 1711 } else { 1712 brcmf_err("Unknown action type: %d\n", action); 1713 goto exit; 1714 } 1715 } else if (brcmf_p2p_is_p2p_action(action_frame->data, 1716 action_frame_len)) { 1717 /* do not configure anything. it will be */ 1718 /* sent with a default configuration */ 1719 } else { 1720 brcmf_err("Unknown Frame: category 0x%x, action 0x%x\n", 1721 category, action); 1722 return false; 1723 } 1724 1725 /* if connecting on primary iface, sleep for a while before sending 1726 * af tx for VSDB 1727 */ 1728 if (test_bit(BRCMF_VIF_STATUS_CONNECTING, 1729 &p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->sme_state)) 1730 msleep(50); 1731 1732 /* if scan is ongoing, abort current scan. */ 1733 if (test_bit(BRCMF_SCAN_STATUS_BUSY, &cfg->scan_status)) 1734 brcmf_abort_scanning(cfg); 1735 1736 memcpy(afx_hdl->tx_dst_addr, action_frame->da, ETH_ALEN); 1737 1738 /* To make sure to send successfully action frame, turn off mpc */ 1739 if (config_af_params.mpc_onoff == 0) 1740 brcmf_set_mpc(ifp, 0); 1741 1742 /* set status and destination address before sending af */ 1743 if (p2p->next_af_subtype != P2P_PAF_SUBTYPE_INVALID) { 1744 /* set status to cancel the remained dwell time in rx process */ 1745 set_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status); 1746 } 1747 1748 p2p->af_sent_channel = 0; 1749 set_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status); 1750 /* validate channel and p2p ies */ 1751 if (config_af_params.search_channel && 1752 IS_P2P_SOCIAL_CHANNEL(le32_to_cpu(af_params->channel)) && 1753 p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif->saved_ie.probe_req_ie_len) { 1754 afx_hdl = &p2p->afx_hdl; 1755 afx_hdl->peer_listen_chan = le32_to_cpu(af_params->channel); 1756 1757 if (brcmf_p2p_af_searching_channel(p2p) == 1758 P2P_INVALID_CHANNEL) { 1759 brcmf_err("Couldn't find peer's channel.\n"); 1760 goto exit; 1761 } 1762 1763 /* Abort scan even for VSDB scenarios. Scan gets aborted in 1764 * firmware but after the check of piggyback algorithm. To take 1765 * care of current piggback algo, lets abort the scan here 1766 * itself. 1767 */ 1768 brcmf_notify_escan_complete(cfg, ifp, true, true); 1769 1770 /* update channel */ 1771 af_params->channel = cpu_to_le32(afx_hdl->peer_chan); 1772 } 1773 1774 tx_retry = 0; 1775 while (!p2p->block_gon_req_tx && 1776 (ack == false) && (tx_retry < P2P_AF_TX_MAX_RETRY)) { 1777 ack = !brcmf_p2p_tx_action_frame(p2p, af_params); 1778 tx_retry++; 1779 } 1780 if (ack == false) { 1781 brcmf_err("Failed to send Action Frame(retry %d)\n", tx_retry); 1782 clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status); 1783 } 1784 1785 exit: 1786 clear_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status); 1787 1788 /* WAR: sometimes dongle does not keep the dwell time of 'actframe'. 1789 * if we coundn't get the next action response frame and dongle does 1790 * not keep the dwell time, go to listen state again to get next action 1791 * response frame. 1792 */ 1793 if (ack && config_af_params.extra_listen && !p2p->block_gon_req_tx && 1794 test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status) && 1795 p2p->af_sent_channel == afx_hdl->my_listen_chan) { 1796 delta_ms = jiffies_to_msecs(jiffies - p2p->af_tx_sent_jiffies); 1797 if (le32_to_cpu(af_params->dwell_time) > delta_ms) 1798 extra_listen_time = le32_to_cpu(af_params->dwell_time) - 1799 delta_ms; 1800 else 1801 extra_listen_time = 0; 1802 if (extra_listen_time > 50) { 1803 set_bit(BRCMF_P2P_STATUS_WAITING_NEXT_AF_LISTEN, 1804 &p2p->status); 1805 brcmf_dbg(INFO, "Wait more time! actual af time:%d, calculated extra listen:%d\n", 1806 le32_to_cpu(af_params->dwell_time), 1807 extra_listen_time); 1808 extra_listen_time += 100; 1809 if (!brcmf_p2p_discover_listen(p2p, 1810 p2p->af_sent_channel, 1811 extra_listen_time)) { 1812 unsigned long duration; 1813 1814 extra_listen_time += 100; 1815 duration = msecs_to_jiffies(extra_listen_time); 1816 wait_for_completion_timeout(&p2p->wait_next_af, 1817 duration); 1818 } 1819 clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_AF_LISTEN, 1820 &p2p->status); 1821 } 1822 } 1823 1824 if (p2p->block_gon_req_tx) { 1825 /* if ack is true, supplicant will wait more time(100ms). 1826 * so we will return it as a success to get more time . 1827 */ 1828 p2p->block_gon_req_tx = false; 1829 ack = true; 1830 } 1831 1832 clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status); 1833 /* if all done, turn mpc on again */ 1834 if (config_af_params.mpc_onoff == 1) 1835 brcmf_set_mpc(ifp, 1); 1836 1837 return ack; 1838 } 1839 1840 /** 1841 * brcmf_p2p_notify_rx_mgmt_p2p_probereq() - Event handler for p2p probe req. 1842 * 1843 * @ifp: interface pointer for which event was received. 1844 * @e: even message. 1845 * @data: payload of event message (probe request). 1846 */ 1847 s32 brcmf_p2p_notify_rx_mgmt_p2p_probereq(struct brcmf_if *ifp, 1848 const struct brcmf_event_msg *e, 1849 void *data) 1850 { 1851 struct brcmf_cfg80211_info *cfg = ifp->drvr->config; 1852 struct brcmf_p2p_info *p2p = &cfg->p2p; 1853 struct afx_hdl *afx_hdl = &p2p->afx_hdl; 1854 struct brcmf_cfg80211_vif *vif = ifp->vif; 1855 struct brcmf_rx_mgmt_data *rxframe = (struct brcmf_rx_mgmt_data *)data; 1856 u16 chanspec = be16_to_cpu(rxframe->chanspec); 1857 struct brcmu_chan ch; 1858 u8 *mgmt_frame; 1859 u32 mgmt_frame_len; 1860 s32 freq; 1861 u16 mgmt_type; 1862 1863 brcmf_dbg(INFO, "Enter: event %d reason %d\n", e->event_code, 1864 e->reason); 1865 1866 if (e->datalen < sizeof(*rxframe)) { 1867 brcmf_dbg(SCAN, "Event data to small. Ignore\n"); 1868 return 0; 1869 } 1870 1871 ch.chspec = be16_to_cpu(rxframe->chanspec); 1872 cfg->d11inf.decchspec(&ch); 1873 1874 if (test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status) && 1875 (ether_addr_equal(afx_hdl->tx_dst_addr, e->addr))) { 1876 afx_hdl->peer_chan = ch.control_ch_num; 1877 brcmf_dbg(INFO, "PROBE REQUEST: Peer found, channel=%d\n", 1878 afx_hdl->peer_chan); 1879 complete(&afx_hdl->act_frm_scan); 1880 } 1881 1882 /* Firmware sends us two proberesponses for each idx one. At the */ 1883 /* moment anything but bsscfgidx 0 is passed up to supplicant */ 1884 if (e->bsscfgidx == 0) 1885 return 0; 1886 1887 /* Filter any P2P probe reqs arriving during the GO-NEG Phase */ 1888 if (test_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status)) { 1889 brcmf_dbg(INFO, "Filtering P2P probe_req in GO-NEG phase\n"); 1890 return 0; 1891 } 1892 1893 /* Check if wpa_supplicant has registered for this frame */ 1894 brcmf_dbg(INFO, "vif->mgmt_rx_reg %04x\n", vif->mgmt_rx_reg); 1895 mgmt_type = (IEEE80211_STYPE_PROBE_REQ & IEEE80211_FCTL_STYPE) >> 4; 1896 if ((vif->mgmt_rx_reg & BIT(mgmt_type)) == 0) 1897 return 0; 1898 1899 mgmt_frame = (u8 *)(rxframe + 1); 1900 mgmt_frame_len = e->datalen - sizeof(*rxframe); 1901 freq = ieee80211_channel_to_frequency(ch.control_ch_num, 1902 ch.band == BRCMU_CHAN_BAND_2G ? 1903 NL80211_BAND_2GHZ : 1904 NL80211_BAND_5GHZ); 1905 1906 cfg80211_rx_mgmt(&vif->wdev, freq, 0, mgmt_frame, mgmt_frame_len, 0); 1907 1908 brcmf_dbg(INFO, "mgmt_frame_len (%d) , e->datalen (%d), chanspec (%04x), freq (%d)\n", 1909 mgmt_frame_len, e->datalen, chanspec, freq); 1910 1911 return 0; 1912 } 1913 1914 1915 /** 1916 * brcmf_p2p_get_current_chanspec() - Get current operation channel. 1917 * 1918 * @p2p: P2P specific data. 1919 * @chanspec: chanspec to be returned. 1920 */ 1921 static void brcmf_p2p_get_current_chanspec(struct brcmf_p2p_info *p2p, 1922 u16 *chanspec) 1923 { 1924 struct brcmf_if *ifp; 1925 u8 mac_addr[ETH_ALEN]; 1926 struct brcmu_chan ch; 1927 struct brcmf_bss_info_le *bi; 1928 u8 *buf; 1929 1930 ifp = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->ifp; 1931 1932 if (brcmf_fil_cmd_data_get(ifp, BRCMF_C_GET_BSSID, mac_addr, 1933 ETH_ALEN) == 0) { 1934 buf = kzalloc(WL_BSS_INFO_MAX, GFP_KERNEL); 1935 if (buf != NULL) { 1936 *(__le32 *)buf = cpu_to_le32(WL_BSS_INFO_MAX); 1937 if (brcmf_fil_cmd_data_get(ifp, BRCMF_C_GET_BSS_INFO, 1938 buf, WL_BSS_INFO_MAX) == 0) { 1939 bi = (struct brcmf_bss_info_le *)(buf + 4); 1940 *chanspec = le16_to_cpu(bi->chanspec); 1941 kfree(buf); 1942 return; 1943 } 1944 kfree(buf); 1945 } 1946 } 1947 /* Use default channel for P2P */ 1948 ch.chnum = BRCMF_P2P_TEMP_CHAN; 1949 ch.bw = BRCMU_CHAN_BW_20; 1950 p2p->cfg->d11inf.encchspec(&ch); 1951 *chanspec = ch.chspec; 1952 } 1953 1954 /** 1955 * Change a P2P Role. 1956 * Parameters: 1957 * @mac: MAC address of the BSS to change a role 1958 * Returns 0 if success. 1959 */ 1960 int brcmf_p2p_ifchange(struct brcmf_cfg80211_info *cfg, 1961 enum brcmf_fil_p2p_if_types if_type) 1962 { 1963 struct brcmf_p2p_info *p2p = &cfg->p2p; 1964 struct brcmf_cfg80211_vif *vif; 1965 struct brcmf_fil_p2p_if_le if_request; 1966 s32 err; 1967 u16 chanspec; 1968 1969 brcmf_dbg(TRACE, "Enter\n"); 1970 1971 vif = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif; 1972 if (!vif) { 1973 brcmf_err("vif for P2PAPI_BSSCFG_PRIMARY does not exist\n"); 1974 return -EPERM; 1975 } 1976 brcmf_notify_escan_complete(cfg, vif->ifp, true, true); 1977 vif = p2p->bss_idx[P2PAPI_BSSCFG_CONNECTION].vif; 1978 if (!vif) { 1979 brcmf_err("vif for P2PAPI_BSSCFG_CONNECTION does not exist\n"); 1980 return -EPERM; 1981 } 1982 brcmf_set_mpc(vif->ifp, 0); 1983 1984 /* In concurrency case, STA may be already associated in a particular */ 1985 /* channel. so retrieve the current channel of primary interface and */ 1986 /* then start the virtual interface on that. */ 1987 brcmf_p2p_get_current_chanspec(p2p, &chanspec); 1988 1989 if_request.type = cpu_to_le16((u16)if_type); 1990 if_request.chspec = cpu_to_le16(chanspec); 1991 memcpy(if_request.addr, p2p->int_addr, sizeof(if_request.addr)); 1992 1993 brcmf_cfg80211_arm_vif_event(cfg, vif); 1994 err = brcmf_fil_iovar_data_set(vif->ifp, "p2p_ifupd", &if_request, 1995 sizeof(if_request)); 1996 if (err) { 1997 brcmf_err("p2p_ifupd FAILED, err=%d\n", err); 1998 brcmf_cfg80211_arm_vif_event(cfg, NULL); 1999 return err; 2000 } 2001 err = brcmf_cfg80211_wait_vif_event(cfg, BRCMF_E_IF_CHANGE, 2002 BRCMF_VIF_EVENT_TIMEOUT); 2003 brcmf_cfg80211_arm_vif_event(cfg, NULL); 2004 if (!err) { 2005 brcmf_err("No BRCMF_E_IF_CHANGE event received\n"); 2006 return -EIO; 2007 } 2008 2009 err = brcmf_fil_cmd_int_set(vif->ifp, BRCMF_C_SET_SCB_TIMEOUT, 2010 BRCMF_SCB_TIMEOUT_VALUE); 2011 2012 return err; 2013 } 2014 2015 static int brcmf_p2p_request_p2p_if(struct brcmf_p2p_info *p2p, 2016 struct brcmf_if *ifp, u8 ea[ETH_ALEN], 2017 enum brcmf_fil_p2p_if_types iftype) 2018 { 2019 struct brcmf_fil_p2p_if_le if_request; 2020 int err; 2021 u16 chanspec; 2022 2023 /* we need a default channel */ 2024 brcmf_p2p_get_current_chanspec(p2p, &chanspec); 2025 2026 /* fill the firmware request */ 2027 memcpy(if_request.addr, ea, ETH_ALEN); 2028 if_request.type = cpu_to_le16((u16)iftype); 2029 if_request.chspec = cpu_to_le16(chanspec); 2030 2031 err = brcmf_fil_iovar_data_set(ifp, "p2p_ifadd", &if_request, 2032 sizeof(if_request)); 2033 2034 return err; 2035 } 2036 2037 static int brcmf_p2p_disable_p2p_if(struct brcmf_cfg80211_vif *vif) 2038 { 2039 struct brcmf_cfg80211_info *cfg = wdev_to_cfg(&vif->wdev); 2040 struct net_device *pri_ndev = cfg_to_ndev(cfg); 2041 struct brcmf_if *ifp = netdev_priv(pri_ndev); 2042 u8 *addr = vif->wdev.netdev->dev_addr; 2043 2044 return brcmf_fil_iovar_data_set(ifp, "p2p_ifdis", addr, ETH_ALEN); 2045 } 2046 2047 static int brcmf_p2p_release_p2p_if(struct brcmf_cfg80211_vif *vif) 2048 { 2049 struct brcmf_cfg80211_info *cfg = wdev_to_cfg(&vif->wdev); 2050 struct net_device *pri_ndev = cfg_to_ndev(cfg); 2051 struct brcmf_if *ifp = netdev_priv(pri_ndev); 2052 u8 *addr = vif->wdev.netdev->dev_addr; 2053 2054 return brcmf_fil_iovar_data_set(ifp, "p2p_ifdel", addr, ETH_ALEN); 2055 } 2056 2057 /** 2058 * brcmf_p2p_create_p2pdev() - create a P2P_DEVICE virtual interface. 2059 * 2060 * @p2p: P2P specific data. 2061 * @wiphy: wiphy device of new interface. 2062 * @addr: mac address for this new interface. 2063 */ 2064 static struct wireless_dev *brcmf_p2p_create_p2pdev(struct brcmf_p2p_info *p2p, 2065 struct wiphy *wiphy, 2066 u8 *addr) 2067 { 2068 struct brcmf_cfg80211_vif *p2p_vif; 2069 struct brcmf_if *p2p_ifp; 2070 struct brcmf_if *pri_ifp; 2071 int err; 2072 u32 bsscfgidx; 2073 2074 if (p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif) 2075 return ERR_PTR(-ENOSPC); 2076 2077 p2p_vif = brcmf_alloc_vif(p2p->cfg, NL80211_IFTYPE_P2P_DEVICE); 2078 if (IS_ERR(p2p_vif)) { 2079 brcmf_err("could not create discovery vif\n"); 2080 return (struct wireless_dev *)p2p_vif; 2081 } 2082 2083 pri_ifp = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->ifp; 2084 brcmf_p2p_generate_bss_mac(p2p, addr); 2085 brcmf_p2p_set_firmware(pri_ifp, p2p->dev_addr); 2086 2087 brcmf_cfg80211_arm_vif_event(p2p->cfg, p2p_vif); 2088 brcmf_fweh_p2pdev_setup(pri_ifp, true); 2089 2090 /* Initialize P2P Discovery in the firmware */ 2091 err = brcmf_fil_iovar_int_set(pri_ifp, "p2p_disc", 1); 2092 if (err < 0) { 2093 brcmf_err("set p2p_disc error\n"); 2094 brcmf_fweh_p2pdev_setup(pri_ifp, false); 2095 brcmf_cfg80211_arm_vif_event(p2p->cfg, NULL); 2096 goto fail; 2097 } 2098 2099 /* wait for firmware event */ 2100 err = brcmf_cfg80211_wait_vif_event(p2p->cfg, BRCMF_E_IF_ADD, 2101 BRCMF_VIF_EVENT_TIMEOUT); 2102 brcmf_cfg80211_arm_vif_event(p2p->cfg, NULL); 2103 brcmf_fweh_p2pdev_setup(pri_ifp, false); 2104 if (!err) { 2105 brcmf_err("timeout occurred\n"); 2106 err = -EIO; 2107 goto fail; 2108 } 2109 2110 /* discovery interface created */ 2111 p2p_ifp = p2p_vif->ifp; 2112 p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif = p2p_vif; 2113 memcpy(p2p_ifp->mac_addr, p2p->dev_addr, ETH_ALEN); 2114 memcpy(&p2p_vif->wdev.address, p2p->dev_addr, sizeof(p2p->dev_addr)); 2115 2116 /* verify bsscfg index for P2P discovery */ 2117 err = brcmf_fil_iovar_int_get(pri_ifp, "p2p_dev", &bsscfgidx); 2118 if (err < 0) { 2119 brcmf_err("retrieving discover bsscfg index failed\n"); 2120 goto fail; 2121 } 2122 2123 WARN_ON(p2p_ifp->bsscfgidx != bsscfgidx); 2124 2125 init_completion(&p2p->send_af_done); 2126 INIT_WORK(&p2p->afx_hdl.afx_work, brcmf_p2p_afx_handler); 2127 init_completion(&p2p->afx_hdl.act_frm_scan); 2128 init_completion(&p2p->wait_next_af); 2129 2130 return &p2p_vif->wdev; 2131 2132 fail: 2133 brcmf_free_vif(p2p_vif); 2134 return ERR_PTR(err); 2135 } 2136 2137 /** 2138 * brcmf_p2p_add_vif() - create a new P2P virtual interface. 2139 * 2140 * @wiphy: wiphy device of new interface. 2141 * @name: name of the new interface. 2142 * @name_assign_type: origin of the interface name 2143 * @type: nl80211 interface type. 2144 * @flags: not used. 2145 * @params: contains mac address for P2P device. 2146 */ 2147 struct wireless_dev *brcmf_p2p_add_vif(struct wiphy *wiphy, const char *name, 2148 unsigned char name_assign_type, 2149 enum nl80211_iftype type, u32 *flags, 2150 struct vif_params *params) 2151 { 2152 struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy); 2153 struct brcmf_if *ifp = netdev_priv(cfg_to_ndev(cfg)); 2154 struct brcmf_cfg80211_vif *vif; 2155 enum brcmf_fil_p2p_if_types iftype; 2156 int err; 2157 2158 if (brcmf_cfg80211_vif_event_armed(cfg)) 2159 return ERR_PTR(-EBUSY); 2160 2161 brcmf_dbg(INFO, "adding vif \"%s\" (type=%d)\n", name, type); 2162 2163 switch (type) { 2164 case NL80211_IFTYPE_P2P_CLIENT: 2165 iftype = BRCMF_FIL_P2P_IF_CLIENT; 2166 break; 2167 case NL80211_IFTYPE_P2P_GO: 2168 iftype = BRCMF_FIL_P2P_IF_GO; 2169 break; 2170 case NL80211_IFTYPE_P2P_DEVICE: 2171 return brcmf_p2p_create_p2pdev(&cfg->p2p, wiphy, 2172 params->macaddr); 2173 default: 2174 return ERR_PTR(-EOPNOTSUPP); 2175 } 2176 2177 vif = brcmf_alloc_vif(cfg, type); 2178 if (IS_ERR(vif)) 2179 return (struct wireless_dev *)vif; 2180 brcmf_cfg80211_arm_vif_event(cfg, vif); 2181 2182 err = brcmf_p2p_request_p2p_if(&cfg->p2p, ifp, cfg->p2p.int_addr, 2183 iftype); 2184 if (err) { 2185 brcmf_cfg80211_arm_vif_event(cfg, NULL); 2186 goto fail; 2187 } 2188 2189 /* wait for firmware event */ 2190 err = brcmf_cfg80211_wait_vif_event(cfg, BRCMF_E_IF_ADD, 2191 BRCMF_VIF_EVENT_TIMEOUT); 2192 brcmf_cfg80211_arm_vif_event(cfg, NULL); 2193 if (!err) { 2194 brcmf_err("timeout occurred\n"); 2195 err = -EIO; 2196 goto fail; 2197 } 2198 2199 /* interface created in firmware */ 2200 ifp = vif->ifp; 2201 if (!ifp) { 2202 brcmf_err("no if pointer provided\n"); 2203 err = -ENOENT; 2204 goto fail; 2205 } 2206 2207 strncpy(ifp->ndev->name, name, sizeof(ifp->ndev->name) - 1); 2208 ifp->ndev->name_assign_type = name_assign_type; 2209 err = brcmf_net_attach(ifp, true); 2210 if (err) { 2211 brcmf_err("Registering netdevice failed\n"); 2212 goto fail; 2213 } 2214 2215 cfg->p2p.bss_idx[P2PAPI_BSSCFG_CONNECTION].vif = vif; 2216 /* Disable firmware roaming for P2P interface */ 2217 brcmf_fil_iovar_int_set(ifp, "roam_off", 1); 2218 if (iftype == BRCMF_FIL_P2P_IF_GO) { 2219 /* set station timeout for p2p */ 2220 brcmf_fil_cmd_int_set(ifp, BRCMF_C_SET_SCB_TIMEOUT, 2221 BRCMF_SCB_TIMEOUT_VALUE); 2222 } 2223 return &ifp->vif->wdev; 2224 2225 fail: 2226 brcmf_free_vif(vif); 2227 return ERR_PTR(err); 2228 } 2229 2230 /** 2231 * brcmf_p2p_del_vif() - delete a P2P virtual interface. 2232 * 2233 * @wiphy: wiphy device of interface. 2234 * @wdev: wireless device of interface. 2235 */ 2236 int brcmf_p2p_del_vif(struct wiphy *wiphy, struct wireless_dev *wdev) 2237 { 2238 struct brcmf_cfg80211_info *cfg = wiphy_priv(wiphy); 2239 struct brcmf_p2p_info *p2p = &cfg->p2p; 2240 struct brcmf_cfg80211_vif *vif; 2241 bool wait_for_disable = false; 2242 int err; 2243 2244 brcmf_dbg(TRACE, "delete P2P vif\n"); 2245 vif = container_of(wdev, struct brcmf_cfg80211_vif, wdev); 2246 2247 brcmf_cfg80211_arm_vif_event(cfg, vif); 2248 switch (vif->wdev.iftype) { 2249 case NL80211_IFTYPE_P2P_CLIENT: 2250 if (test_bit(BRCMF_VIF_STATUS_DISCONNECTING, &vif->sme_state)) 2251 wait_for_disable = true; 2252 break; 2253 2254 case NL80211_IFTYPE_P2P_GO: 2255 if (!brcmf_p2p_disable_p2p_if(vif)) 2256 wait_for_disable = true; 2257 break; 2258 2259 case NL80211_IFTYPE_P2P_DEVICE: 2260 if (!p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif) 2261 return 0; 2262 brcmf_p2p_cancel_remain_on_channel(vif->ifp); 2263 brcmf_p2p_deinit_discovery(p2p); 2264 break; 2265 2266 default: 2267 return -ENOTSUPP; 2268 } 2269 2270 clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status); 2271 brcmf_dbg(INFO, "P2P: GO_NEG_PHASE status cleared\n"); 2272 2273 if (wait_for_disable) 2274 wait_for_completion_timeout(&cfg->vif_disabled, 2275 BRCMF_P2P_DISABLE_TIMEOUT); 2276 2277 err = 0; 2278 if (vif->wdev.iftype != NL80211_IFTYPE_P2P_DEVICE) { 2279 brcmf_vif_clear_mgmt_ies(vif); 2280 err = brcmf_p2p_release_p2p_if(vif); 2281 } 2282 if (!err) { 2283 /* wait for firmware event */ 2284 err = brcmf_cfg80211_wait_vif_event(cfg, BRCMF_E_IF_DEL, 2285 BRCMF_VIF_EVENT_TIMEOUT); 2286 if (!err) 2287 err = -EIO; 2288 else 2289 err = 0; 2290 } 2291 brcmf_remove_interface(vif->ifp, true); 2292 2293 brcmf_cfg80211_arm_vif_event(cfg, NULL); 2294 if (vif->wdev.iftype != NL80211_IFTYPE_P2P_DEVICE) 2295 p2p->bss_idx[P2PAPI_BSSCFG_CONNECTION].vif = NULL; 2296 2297 return err; 2298 } 2299 2300 void brcmf_p2p_ifp_removed(struct brcmf_if *ifp, bool rtnl_locked) 2301 { 2302 struct brcmf_cfg80211_info *cfg; 2303 struct brcmf_cfg80211_vif *vif; 2304 2305 brcmf_dbg(INFO, "P2P: device interface removed\n"); 2306 vif = ifp->vif; 2307 cfg = wdev_to_cfg(&vif->wdev); 2308 cfg->p2p.bss_idx[P2PAPI_BSSCFG_DEVICE].vif = NULL; 2309 if (!rtnl_locked) 2310 rtnl_lock(); 2311 cfg80211_unregister_wdev(&vif->wdev); 2312 if (!rtnl_locked) 2313 rtnl_unlock(); 2314 brcmf_free_vif(vif); 2315 } 2316 2317 int brcmf_p2p_start_device(struct wiphy *wiphy, struct wireless_dev *wdev) 2318 { 2319 struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy); 2320 struct brcmf_p2p_info *p2p = &cfg->p2p; 2321 struct brcmf_cfg80211_vif *vif; 2322 int err; 2323 2324 vif = container_of(wdev, struct brcmf_cfg80211_vif, wdev); 2325 mutex_lock(&cfg->usr_sync); 2326 err = brcmf_p2p_enable_discovery(p2p); 2327 if (!err) 2328 set_bit(BRCMF_VIF_STATUS_READY, &vif->sme_state); 2329 mutex_unlock(&cfg->usr_sync); 2330 return err; 2331 } 2332 2333 void brcmf_p2p_stop_device(struct wiphy *wiphy, struct wireless_dev *wdev) 2334 { 2335 struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy); 2336 struct brcmf_p2p_info *p2p = &cfg->p2p; 2337 struct brcmf_cfg80211_vif *vif; 2338 2339 vif = container_of(wdev, struct brcmf_cfg80211_vif, wdev); 2340 /* This call can be result of the unregister_wdev call. In that case 2341 * we dont want to do anything anymore. Just return. The config vif 2342 * will have been cleared at this point. 2343 */ 2344 if (p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif == vif) { 2345 mutex_lock(&cfg->usr_sync); 2346 /* Set the discovery state to SCAN */ 2347 (void)brcmf_p2p_set_discover_state(vif->ifp, 2348 WL_P2P_DISC_ST_SCAN, 0, 0); 2349 brcmf_abort_scanning(cfg); 2350 clear_bit(BRCMF_VIF_STATUS_READY, &vif->sme_state); 2351 mutex_unlock(&cfg->usr_sync); 2352 } 2353 } 2354 2355 /** 2356 * brcmf_p2p_attach() - attach for P2P. 2357 * 2358 * @cfg: driver private data for cfg80211 interface. 2359 * @p2pdev_forced: create p2p device interface at attach. 2360 */ 2361 s32 brcmf_p2p_attach(struct brcmf_cfg80211_info *cfg, bool p2pdev_forced) 2362 { 2363 struct brcmf_p2p_info *p2p; 2364 struct brcmf_if *pri_ifp; 2365 s32 err = 0; 2366 void *err_ptr; 2367 2368 p2p = &cfg->p2p; 2369 p2p->cfg = cfg; 2370 2371 pri_ifp = brcmf_get_ifp(cfg->pub, 0); 2372 p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif = pri_ifp->vif; 2373 2374 if (p2pdev_forced) { 2375 err_ptr = brcmf_p2p_create_p2pdev(p2p, NULL, NULL); 2376 if (IS_ERR(err_ptr)) { 2377 brcmf_err("P2P device creation failed.\n"); 2378 err = PTR_ERR(err_ptr); 2379 } 2380 } else { 2381 p2p->p2pdev_dynamically = true; 2382 } 2383 return err; 2384 } 2385 2386 /** 2387 * brcmf_p2p_detach() - detach P2P. 2388 * 2389 * @p2p: P2P specific data. 2390 */ 2391 void brcmf_p2p_detach(struct brcmf_p2p_info *p2p) 2392 { 2393 struct brcmf_cfg80211_vif *vif; 2394 2395 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif; 2396 if (vif != NULL) { 2397 brcmf_p2p_cancel_remain_on_channel(vif->ifp); 2398 brcmf_p2p_deinit_discovery(p2p); 2399 brcmf_remove_interface(vif->ifp, false); 2400 } 2401 /* just set it all to zero */ 2402 memset(p2p, 0, sizeof(*p2p)); 2403 } 2404 2405