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Linux 4.16.11
[linux/fpc-iii.git] / drivers / net / wireless / broadcom / brcm80211 / brcmfmac / p2p.c
blob82064e90978497cce2ce98759cf099829a757bf1
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 a random ethernet
466 * address.
467 */
468 static void brcmf_p2p_generate_bss_mac(struct brcmf_p2p_info *p2p, u8 *dev_addr)
469 {
470 bool random_addr = false;
471
472 if (!dev_addr || is_zero_ether_addr(dev_addr))
473 random_addr = true;
474
475 /* Generate the P2P Device Address obtaining a random ethernet
476 * address with the locally administered bit set.
477 */
478 if (random_addr)
479 eth_random_addr(p2p->dev_addr);
480 else
481 memcpy(p2p->dev_addr, dev_addr, ETH_ALEN);
482
483 /* Generate the P2P Interface Address. If the discovery and connection
484 * BSSCFGs need to simultaneously co-exist, then this address must be
485 * different from the P2P Device Address, but also locally administered.
486 */
487 memcpy(p2p->int_addr, p2p->dev_addr, ETH_ALEN);
488 p2p->int_addr[0] |= 0x02;
489 p2p->int_addr[4] ^= 0x80;
490 }
491
492 /**
493 * brcmf_p2p_scan_is_p2p_request() - is cfg80211 scan request a P2P scan.
494 *
495 * @request: the scan request as received from cfg80211.
496 *
497 * returns true if one of the ssids in the request matches the
498 * P2P wildcard ssid; otherwise returns false.
499 */
500 static bool brcmf_p2p_scan_is_p2p_request(struct cfg80211_scan_request *request)
501 {
502 struct cfg80211_ssid *ssids = request->ssids;
503 int i;
504
505 for (i = 0; i < request->n_ssids; i++) {
506 if (ssids[i].ssid_len != BRCMF_P2P_WILDCARD_SSID_LEN)
507 continue;
508
509 brcmf_dbg(INFO, "comparing ssid \"%s\"", ssids[i].ssid);
510 if (!memcmp(BRCMF_P2P_WILDCARD_SSID, ssids[i].ssid,
511 BRCMF_P2P_WILDCARD_SSID_LEN))
512 return true;
513 }
514 return false;
515 }
516
517 /**
518 * brcmf_p2p_set_discover_state - set discover state in firmware.
519 *
520 * @ifp: low-level interface object.
521 * @state: discover state to set.
522 * @chanspec: channel parameters (for state @WL_P2P_DISC_ST_LISTEN only).
523 * @listen_ms: duration to listen (for state @WL_P2P_DISC_ST_LISTEN only).
524 */
525 static s32 brcmf_p2p_set_discover_state(struct brcmf_if *ifp, u8 state,
526 u16 chanspec, u16 listen_ms)
527 {
528 struct brcmf_p2p_disc_st_le discover_state;
529 s32 ret = 0;
530 brcmf_dbg(TRACE, "enter\n");
531
532 discover_state.state = state;
533 discover_state.chspec = cpu_to_le16(chanspec);
534 discover_state.dwell = cpu_to_le16(listen_ms);
535 ret = brcmf_fil_bsscfg_data_set(ifp, "p2p_state", &discover_state,
536 sizeof(discover_state));
537 return ret;
538 }
539
540 /**
541 * brcmf_p2p_deinit_discovery() - disable P2P device discovery.
542 *
543 * @p2p: P2P specific data.
544 *
545 * Resets the discovery state and disables it in firmware.
546 */
547 static s32 brcmf_p2p_deinit_discovery(struct brcmf_p2p_info *p2p)
548 {
549 struct brcmf_cfg80211_vif *vif;
550
551 brcmf_dbg(TRACE, "enter\n");
552
553 /* Set the discovery state to SCAN */
554 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif;
555 (void)brcmf_p2p_set_discover_state(vif->ifp, WL_P2P_DISC_ST_SCAN, 0, 0);
556
557 /* Disable P2P discovery in the firmware */
558 vif = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif;
559 (void)brcmf_fil_iovar_int_set(vif->ifp, "p2p_disc", 0);
560
561 return 0;
562 }
563
564 /**
565 * brcmf_p2p_enable_discovery() - initialize and configure discovery.
566 *
567 * @p2p: P2P specific data.
568 *
569 * Initializes the discovery device and configure the virtual interface.
570 */
571 static int brcmf_p2p_enable_discovery(struct brcmf_p2p_info *p2p)
572 {
573 struct brcmf_cfg80211_vif *vif;
574 s32 ret = 0;
575
576 brcmf_dbg(TRACE, "enter\n");
577 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif;
578 if (!vif) {
579 brcmf_err("P2P config device not available\n");
580 ret = -EPERM;
581 goto exit;
582 }
583
584 if (test_bit(BRCMF_P2P_STATUS_ENABLED, &p2p->status)) {
585 brcmf_dbg(INFO, "P2P config device already configured\n");
586 goto exit;
587 }
588
589 /* Re-initialize P2P Discovery in the firmware */
590 vif = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif;
591 ret = brcmf_fil_iovar_int_set(vif->ifp, "p2p_disc", 1);
592 if (ret < 0) {
593 brcmf_err("set p2p_disc error\n");
594 goto exit;
595 }
596 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif;
597 ret = brcmf_p2p_set_discover_state(vif->ifp, WL_P2P_DISC_ST_SCAN, 0, 0);
598 if (ret < 0) {
599 brcmf_err("unable to set WL_P2P_DISC_ST_SCAN\n");
600 goto exit;
601 }
602
603 /*
604 * Set wsec to any non-zero value in the discovery bsscfg
605 * to ensure our P2P probe responses have the privacy bit
606 * set in the 802.11 WPA IE. Some peer devices may not
607 * initiate WPS with us if this bit is not set.
608 */
609 ret = brcmf_fil_bsscfg_int_set(vif->ifp, "wsec", AES_ENABLED);
610 if (ret < 0) {
611 brcmf_err("wsec error %d\n", ret);
612 goto exit;
613 }
614
615 set_bit(BRCMF_P2P_STATUS_ENABLED, &p2p->status);
616 exit:
617 return ret;
618 }
619
620 /**
621 * brcmf_p2p_escan() - initiate a P2P scan.
622 *
623 * @p2p: P2P specific data.
624 * @num_chans: number of channels to scan.
625 * @chanspecs: channel parameters for @num_chans channels.
626 * @search_state: P2P discover state to use.
627 * @bss_type: type of P2P bss.
628 */
629 static s32 brcmf_p2p_escan(struct brcmf_p2p_info *p2p, u32 num_chans,
630 u16 chanspecs[], s32 search_state,
631 enum p2p_bss_type bss_type)
632 {
633 s32 ret = 0;
634 s32 memsize = offsetof(struct brcmf_p2p_scan_le,
635 eparams.params_le.channel_list);
636 s32 nprobes;
637 s32 active;
638 u32 i;
639 u8 *memblk;
640 struct brcmf_cfg80211_vif *vif;
641 struct brcmf_p2p_scan_le *p2p_params;
642 struct brcmf_scan_params_le *sparams;
643
644 memsize += num_chans * sizeof(__le16);
645 memblk = kzalloc(memsize, GFP_KERNEL);
646 if (!memblk)
647 return -ENOMEM;
648
649 vif = p2p->bss_idx[bss_type].vif;
650 if (vif == NULL) {
651 brcmf_err("no vif for bss type %d\n", bss_type);
652 ret = -EINVAL;
653 goto exit;
654 }
655 p2p_params = (struct brcmf_p2p_scan_le *)memblk;
656 sparams = &p2p_params->eparams.params_le;
657
658 switch (search_state) {
659 case WL_P2P_DISC_ST_SEARCH:
660 /*
661 * If we in SEARCH STATE, we don't need to set SSID explictly
662 * because dongle use P2P WILDCARD internally by default, use
663 * null ssid, which it is already due to kzalloc.
664 */
665 break;
666 case WL_P2P_DISC_ST_SCAN:
667 /*
668 * wpa_supplicant has p2p_find command with type social or
669 * progressive. For progressive, we need to set the ssid to
670 * P2P WILDCARD because we just do broadcast scan unless
671 * setting SSID.
672 */
673 sparams->ssid_le.SSID_len =
674 cpu_to_le32(BRCMF_P2P_WILDCARD_SSID_LEN);
675 memcpy(sparams->ssid_le.SSID, BRCMF_P2P_WILDCARD_SSID,
676 BRCMF_P2P_WILDCARD_SSID_LEN);
677 break;
678 default:
679 brcmf_err(" invalid search state %d\n", search_state);
680 ret = -EINVAL;
681 goto exit;
682 }
683
684 brcmf_p2p_set_discover_state(vif->ifp, search_state, 0, 0);
685
686 /*
687 * set p2p scan parameters.
688 */
689 p2p_params->type = 'E';
690
691 /* determine the scan engine parameters */
692 sparams->bss_type = DOT11_BSSTYPE_ANY;
693 sparams->scan_type = BRCMF_SCANTYPE_ACTIVE;
694
695 eth_broadcast_addr(sparams->bssid);
696 sparams->home_time = cpu_to_le32(P2PAPI_SCAN_HOME_TIME_MS);
697
698 /*
699 * SOCIAL_CHAN_CNT + 1 takes care of the Progressive scan
700 * supported by the supplicant.
701 */
702 if (num_chans == SOCIAL_CHAN_CNT || num_chans == (SOCIAL_CHAN_CNT + 1))
703 active = P2PAPI_SCAN_SOCIAL_DWELL_TIME_MS;
704 else if (num_chans == AF_PEER_SEARCH_CNT)
705 active = P2PAPI_SCAN_AF_SEARCH_DWELL_TIME_MS;
706 else if (brcmf_get_vif_state_any(p2p->cfg, BRCMF_VIF_STATUS_CONNECTED))
707 active = -1;
708 else
709 active = P2PAPI_SCAN_DWELL_TIME_MS;
710
711 /* Override scan params to find a peer for a connection */
712 if (num_chans == 1) {
713 active = WL_SCAN_CONNECT_DWELL_TIME_MS;
714 /* WAR to sync with presence period of VSDB GO.
715 * send probe request more frequently
716 */
717 nprobes = active / WL_SCAN_JOIN_PROBE_INTERVAL_MS;
718 } else {
719 nprobes = active / P2PAPI_SCAN_NPROBS_TIME_MS;
720 }
721
722 if (nprobes <= 0)
723 nprobes = 1;
724
725 brcmf_dbg(INFO, "nprobes # %d, active_time %d\n", nprobes, active);
726 sparams->active_time = cpu_to_le32(active);
727 sparams->nprobes = cpu_to_le32(nprobes);
728 sparams->passive_time = cpu_to_le32(-1);
729 sparams->channel_num = cpu_to_le32(num_chans &
730 BRCMF_SCAN_PARAMS_COUNT_MASK);
731 for (i = 0; i < num_chans; i++)
732 sparams->channel_list[i] = cpu_to_le16(chanspecs[i]);
733
734 /* set the escan specific parameters */
735 p2p_params->eparams.version = cpu_to_le32(BRCMF_ESCAN_REQ_VERSION);
736 p2p_params->eparams.action = cpu_to_le16(WL_ESCAN_ACTION_START);
737 p2p_params->eparams.sync_id = cpu_to_le16(0x1234);
738 /* perform p2p scan on primary device */
739 ret = brcmf_fil_bsscfg_data_set(vif->ifp, "p2p_scan", memblk, memsize);
740 if (!ret)
741 set_bit(BRCMF_SCAN_STATUS_BUSY, &p2p->cfg->scan_status);
742 exit:
743 kfree(memblk);
744 return ret;
745 }
746
747 /**
748 * brcmf_p2p_run_escan() - escan callback for peer-to-peer.
749 *
750 * @cfg: driver private data for cfg80211 interface.
751 * @ndev: net device for which scan is requested.
752 * @request: scan request from cfg80211.
753 * @action: scan action.
754 *
755 * Determines the P2P discovery state based to scan request parameters and
756 * validates the channels in the request.
757 */
758 static s32 brcmf_p2p_run_escan(struct brcmf_cfg80211_info *cfg,
759 struct brcmf_if *ifp,
760 struct cfg80211_scan_request *request)
761 {
762 struct brcmf_p2p_info *p2p = &cfg->p2p;
763 s32 err = 0;
764 s32 search_state = WL_P2P_DISC_ST_SCAN;
765 struct brcmf_cfg80211_vif *vif;
766 struct net_device *dev = NULL;
767 int i, num_nodfs = 0;
768 u16 *chanspecs;
769
770 brcmf_dbg(TRACE, "enter\n");
771
772 if (!request) {
773 err = -EINVAL;
774 goto exit;
775 }
776
777 if (request->n_channels) {
778 chanspecs = kcalloc(request->n_channels, sizeof(*chanspecs),
779 GFP_KERNEL);
780 if (!chanspecs) {
781 err = -ENOMEM;
782 goto exit;
783 }
784 vif = p2p->bss_idx[P2PAPI_BSSCFG_CONNECTION].vif;
785 if (vif)
786 dev = vif->wdev.netdev;
787 if (request->n_channels == 3 &&
788 request->channels[0]->hw_value == SOCIAL_CHAN_1 &&
789 request->channels[1]->hw_value == SOCIAL_CHAN_2 &&
790 request->channels[2]->hw_value == SOCIAL_CHAN_3) {
791 /* SOCIAL CHANNELS 1, 6, 11 */
792 search_state = WL_P2P_DISC_ST_SEARCH;
793 brcmf_dbg(INFO, "P2P SEARCH PHASE START\n");
794 } else if (dev != NULL &&
795 vif->wdev.iftype == NL80211_IFTYPE_P2P_GO) {
796 /* If you are already a GO, then do SEARCH only */
797 brcmf_dbg(INFO, "Already a GO. Do SEARCH Only\n");
798 search_state = WL_P2P_DISC_ST_SEARCH;
799 } else {
800 brcmf_dbg(INFO, "P2P SCAN STATE START\n");
801 }
802
803 /*
804 * no P2P scanning on passive or DFS channels.
805 */
806 for (i = 0; i < request->n_channels; i++) {
807 struct ieee80211_channel *chan = request->channels[i];
808
809 if (chan->flags & (IEEE80211_CHAN_RADAR |
810 IEEE80211_CHAN_NO_IR))
811 continue;
812
813 chanspecs[i] = channel_to_chanspec(&p2p->cfg->d11inf,
814 chan);
815 brcmf_dbg(INFO, "%d: chan=%d, channel spec=%x\n",
816 num_nodfs, chan->hw_value, chanspecs[i]);
817 num_nodfs++;
818 }
819 err = brcmf_p2p_escan(p2p, num_nodfs, chanspecs, search_state,
820 P2PAPI_BSSCFG_DEVICE);
821 kfree(chanspecs);
822 }
823 exit:
824 if (err)
825 brcmf_err("error (%d)\n", err);
826 return err;
827 }
828
829
830 /**
831 * brcmf_p2p_find_listen_channel() - find listen channel in ie string.
832 *
833 * @ie: string of information elements.
834 * @ie_len: length of string.
835 *
836 * Scan ie for p2p ie and look for attribute 6 channel. If available determine
837 * channel and return it.
838 */
839 static s32 brcmf_p2p_find_listen_channel(const u8 *ie, u32 ie_len)
840 {
841 u8 channel_ie[5];
842 s32 listen_channel;
843 s32 err;
844
845 err = cfg80211_get_p2p_attr(ie, ie_len,
846 IEEE80211_P2P_ATTR_LISTEN_CHANNEL,
847 channel_ie, sizeof(channel_ie));
848 if (err < 0)
849 return err;
850
851 /* listen channel subel length format: */
852 /* 3(country) + 1(op. class) + 1(chan num) */
853 listen_channel = (s32)channel_ie[3 + 1];
854
855 if (listen_channel == SOCIAL_CHAN_1 ||
856 listen_channel == SOCIAL_CHAN_2 ||
857 listen_channel == SOCIAL_CHAN_3) {
858 brcmf_dbg(INFO, "Found my Listen Channel %d\n", listen_channel);
859 return listen_channel;
860 }
861
862 return -EPERM;
863 }
864
865
866 /**
867 * brcmf_p2p_scan_prep() - prepare scan based on request.
868 *
869 * @wiphy: wiphy device.
870 * @request: scan request from cfg80211.
871 * @vif: vif on which scan request is to be executed.
872 *
873 * Prepare the scan appropriately for type of scan requested. Overrides the
874 * escan .run() callback for peer-to-peer scanning.
875 */
876 int brcmf_p2p_scan_prep(struct wiphy *wiphy,
877 struct cfg80211_scan_request *request,
878 struct brcmf_cfg80211_vif *vif)
879 {
880 struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
881 struct brcmf_p2p_info *p2p = &cfg->p2p;
882 int err;
883
884 if (brcmf_p2p_scan_is_p2p_request(request)) {
885 /* find my listen channel */
886 err = brcmf_p2p_find_listen_channel(request->ie,
887 request->ie_len);
888 if (err < 0)
889 return err;
890
891 p2p->afx_hdl.my_listen_chan = err;
892
893 clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status);
894 brcmf_dbg(INFO, "P2P: GO_NEG_PHASE status cleared\n");
895
896 err = brcmf_p2p_enable_discovery(p2p);
897 if (err)
898 return err;
899
900 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif;
901
902 /* override .run_escan() callback. */
903 cfg->escan_info.run = brcmf_p2p_run_escan;
904 }
905 return 0;
906 }
907
908
909 /**
910 * brcmf_p2p_discover_listen() - set firmware to discover listen state.
911 *
912 * @p2p: p2p device.
913 * @channel: channel nr for discover listen.
914 * @duration: time in ms to stay on channel.
915 *
916 */
917 static s32
918 brcmf_p2p_discover_listen(struct brcmf_p2p_info *p2p, u16 channel, u32 duration)
919 {
920 struct brcmf_cfg80211_vif *vif;
921 struct brcmu_chan ch;
922 s32 err = 0;
923
924 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif;
925 if (!vif) {
926 brcmf_err("Discovery is not set, so we have nothing to do\n");
927 err = -EPERM;
928 goto exit;
929 }
930
931 if (test_bit(BRCMF_P2P_STATUS_DISCOVER_LISTEN, &p2p->status)) {
932 brcmf_err("Previous LISTEN is not completed yet\n");
933 /* WAR: prevent cookie mismatch in wpa_supplicant return OK */
934 goto exit;
935 }
936
937 ch.chnum = channel;
938 ch.bw = BRCMU_CHAN_BW_20;
939 p2p->cfg->d11inf.encchspec(&ch);
940 err = brcmf_p2p_set_discover_state(vif->ifp, WL_P2P_DISC_ST_LISTEN,
941 ch.chspec, (u16)duration);
942 if (!err) {
943 set_bit(BRCMF_P2P_STATUS_DISCOVER_LISTEN, &p2p->status);
944 p2p->remain_on_channel_cookie++;
945 }
946 exit:
947 return err;
948 }
949
950
951 /**
952 * brcmf_p2p_remain_on_channel() - put device on channel and stay there.
953 *
954 * @wiphy: wiphy device.
955 * @channel: channel to stay on.
956 * @duration: time in ms to remain on channel.
957 *
958 */
959 int brcmf_p2p_remain_on_channel(struct wiphy *wiphy, struct wireless_dev *wdev,
960 struct ieee80211_channel *channel,
961 unsigned int duration, u64 *cookie)
962 {
963 struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
964 struct brcmf_p2p_info *p2p = &cfg->p2p;
965 s32 err;
966 u16 channel_nr;
967
968 channel_nr = ieee80211_frequency_to_channel(channel->center_freq);
969 brcmf_dbg(TRACE, "Enter, channel: %d, duration ms (%d)\n", channel_nr,
970 duration);
971
972 err = brcmf_p2p_enable_discovery(p2p);
973 if (err)
974 goto exit;
975 err = brcmf_p2p_discover_listen(p2p, channel_nr, duration);
976 if (err)
977 goto exit;
978
979 memcpy(&p2p->remain_on_channel, channel, sizeof(*channel));
980 *cookie = p2p->remain_on_channel_cookie;
981 cfg80211_ready_on_channel(wdev, *cookie, channel, duration, GFP_KERNEL);
982
983 exit:
984 return err;
985 }
986
987
988 /**
989 * brcmf_p2p_notify_listen_complete() - p2p listen has completed.
990 *
991 * @ifp: interfac control.
992 * @e: event message. Not used, to make it usable for fweh event dispatcher.
993 * @data: payload of message. Not used.
994 *
995 */
996 int brcmf_p2p_notify_listen_complete(struct brcmf_if *ifp,
997 const struct brcmf_event_msg *e,
998 void *data)
999 {
1000 struct brcmf_cfg80211_info *cfg = ifp->drvr->config;
1001 struct brcmf_p2p_info *p2p = &cfg->p2p;
1002
1003 brcmf_dbg(TRACE, "Enter\n");
1004 if (test_and_clear_bit(BRCMF_P2P_STATUS_DISCOVER_LISTEN,
1005 &p2p->status)) {
1006 if (test_and_clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_AF_LISTEN,
1007 &p2p->status)) {
1008 clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME,
1009 &p2p->status);
1010 brcmf_dbg(INFO, "Listen DONE, wake up wait_next_af\n");
1011 complete(&p2p->wait_next_af);
1012 }
1013
1014 cfg80211_remain_on_channel_expired(&ifp->vif->wdev,
1015 p2p->remain_on_channel_cookie,
1016 &p2p->remain_on_channel,
1017 GFP_KERNEL);
1018 }
1019 return 0;
1020 }
1021
1022
1023 /**
1024 * brcmf_p2p_cancel_remain_on_channel() - cancel p2p listen state.
1025 *
1026 * @ifp: interfac control.
1027 *
1028 */
1029 void brcmf_p2p_cancel_remain_on_channel(struct brcmf_if *ifp)
1030 {
1031 if (!ifp)
1032 return;
1033 brcmf_p2p_set_discover_state(ifp, WL_P2P_DISC_ST_SCAN, 0, 0);
1034 brcmf_p2p_notify_listen_complete(ifp, NULL, NULL);
1035 }
1036
1037
1038 /**
1039 * brcmf_p2p_act_frm_search() - search function for action frame.
1040 *
1041 * @p2p: p2p device.
1042 * channel: channel on which action frame is to be trasmitted.
1043 *
1044 * search function to reach at common channel to send action frame. When
1045 * channel is 0 then all social channels will be used to send af
1046 */
1047 static s32 brcmf_p2p_act_frm_search(struct brcmf_p2p_info *p2p, u16 channel)
1048 {
1049 s32 err;
1050 u32 channel_cnt;
1051 u16 *default_chan_list;
1052 u32 i;
1053 struct brcmu_chan ch;
1054
1055 brcmf_dbg(TRACE, "Enter\n");
1056
1057 if (channel)
1058 channel_cnt = AF_PEER_SEARCH_CNT;
1059 else
1060 channel_cnt = SOCIAL_CHAN_CNT;
1061 default_chan_list = kzalloc(channel_cnt * sizeof(*default_chan_list),
1062 GFP_KERNEL);
1063 if (default_chan_list == NULL) {
1064 brcmf_err("channel list allocation failed\n");
1065 err = -ENOMEM;
1066 goto exit;
1067 }
1068 ch.bw = BRCMU_CHAN_BW_20;
1069 if (channel) {
1070 ch.chnum = channel;
1071 p2p->cfg->d11inf.encchspec(&ch);
1072 /* insert same channel to the chan_list */
1073 for (i = 0; i < channel_cnt; i++)
1074 default_chan_list[i] = ch.chspec;
1075 } else {
1076 ch.chnum = SOCIAL_CHAN_1;
1077 p2p->cfg->d11inf.encchspec(&ch);
1078 default_chan_list[0] = ch.chspec;
1079 ch.chnum = SOCIAL_CHAN_2;
1080 p2p->cfg->d11inf.encchspec(&ch);
1081 default_chan_list[1] = ch.chspec;
1082 ch.chnum = SOCIAL_CHAN_3;
1083 p2p->cfg->d11inf.encchspec(&ch);
1084 default_chan_list[2] = ch.chspec;
1085 }
1086 err = brcmf_p2p_escan(p2p, channel_cnt, default_chan_list,
1087 WL_P2P_DISC_ST_SEARCH, P2PAPI_BSSCFG_DEVICE);
1088 kfree(default_chan_list);
1089 exit:
1090 return err;
1091 }
1092
1093
1094 /**
1095 * brcmf_p2p_afx_handler() - afx worker thread.
1096 *
1097 * @work:
1098 *
1099 */
1100 static void brcmf_p2p_afx_handler(struct work_struct *work)
1101 {
1102 struct afx_hdl *afx_hdl = container_of(work, struct afx_hdl, afx_work);
1103 struct brcmf_p2p_info *p2p = container_of(afx_hdl,
1104 struct brcmf_p2p_info,
1105 afx_hdl);
1106 s32 err;
1107
1108 if (!afx_hdl->is_active)
1109 return;
1110
1111 if (afx_hdl->is_listen && afx_hdl->my_listen_chan)
1112 /* 100ms ~ 300ms */
1113 err = brcmf_p2p_discover_listen(p2p, afx_hdl->my_listen_chan,
1114 100 * (1 + prandom_u32() % 3));
1115 else
1116 err = brcmf_p2p_act_frm_search(p2p, afx_hdl->peer_listen_chan);
1117
1118 if (err) {
1119 brcmf_err("ERROR occurred! value is (%d)\n", err);
1120 if (test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL,
1121 &p2p->status))
1122 complete(&afx_hdl->act_frm_scan);
1123 }
1124 }
1125
1126
1127 /**
1128 * brcmf_p2p_af_searching_channel() - search channel.
1129 *
1130 * @p2p: p2p device info struct.
1131 *
1132 */
1133 static s32 brcmf_p2p_af_searching_channel(struct brcmf_p2p_info *p2p)
1134 {
1135 struct afx_hdl *afx_hdl = &p2p->afx_hdl;
1136 struct brcmf_cfg80211_vif *pri_vif;
1137 unsigned long duration;
1138 s32 retry;
1139
1140 brcmf_dbg(TRACE, "Enter\n");
1141
1142 pri_vif = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif;
1143
1144 reinit_completion(&afx_hdl->act_frm_scan);
1145 set_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status);
1146 afx_hdl->is_active = true;
1147 afx_hdl->peer_chan = P2P_INVALID_CHANNEL;
1148
1149 /* Loop to wait until we find a peer's channel or the
1150 * pending action frame tx is cancelled.
1151 */
1152 retry = 0;
1153 duration = msecs_to_jiffies(P2P_AF_FRM_SCAN_MAX_WAIT);
1154 while ((retry < P2P_CHANNEL_SYNC_RETRY) &&
1155 (afx_hdl->peer_chan == P2P_INVALID_CHANNEL)) {
1156 afx_hdl->is_listen = false;
1157 brcmf_dbg(TRACE, "Scheduling action frame for sending.. (%d)\n",
1158 retry);
1159 /* search peer on peer's listen channel */
1160 schedule_work(&afx_hdl->afx_work);
1161 wait_for_completion_timeout(&afx_hdl->act_frm_scan, duration);
1162 if ((afx_hdl->peer_chan != P2P_INVALID_CHANNEL) ||
1163 (!test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL,
1164 &p2p->status)))
1165 break;
1166
1167 if (afx_hdl->my_listen_chan) {
1168 brcmf_dbg(TRACE, "Scheduling listen peer, channel=%d\n",
1169 afx_hdl->my_listen_chan);
1170 /* listen on my listen channel */
1171 afx_hdl->is_listen = true;
1172 schedule_work(&afx_hdl->afx_work);
1173 wait_for_completion_timeout(&afx_hdl->act_frm_scan,
1174 duration);
1175 }
1176 if ((afx_hdl->peer_chan != P2P_INVALID_CHANNEL) ||
1177 (!test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL,
1178 &p2p->status)))
1179 break;
1180 retry++;
1181
1182 /* if sta is connected or connecting, sleep for a while before
1183 * retry af tx or finding a peer
1184 */
1185 if (test_bit(BRCMF_VIF_STATUS_CONNECTED, &pri_vif->sme_state) ||
1186 test_bit(BRCMF_VIF_STATUS_CONNECTING, &pri_vif->sme_state))
1187 msleep(P2P_DEFAULT_SLEEP_TIME_VSDB);
1188 }
1189
1190 brcmf_dbg(TRACE, "Completed search/listen peer_chan=%d\n",
1191 afx_hdl->peer_chan);
1192 afx_hdl->is_active = false;
1193
1194 clear_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status);
1195
1196 return afx_hdl->peer_chan;
1197 }
1198
1199
1200 /**
1201 * brcmf_p2p_scan_finding_common_channel() - was escan used for finding channel
1202 *
1203 * @cfg: common configuration struct.
1204 * @bi: bss info struct, result from scan.
1205 *
1206 */
1207 bool brcmf_p2p_scan_finding_common_channel(struct brcmf_cfg80211_info *cfg,
1208 struct brcmf_bss_info_le *bi)
1209
1210 {
1211 struct brcmf_p2p_info *p2p = &cfg->p2p;
1212 struct afx_hdl *afx_hdl = &p2p->afx_hdl;
1213 struct brcmu_chan ch;
1214 u8 *ie;
1215 s32 err;
1216 u8 p2p_dev_addr[ETH_ALEN];
1217
1218 if (!test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status))
1219 return false;
1220
1221 if (bi == NULL) {
1222 brcmf_dbg(TRACE, "ACTION FRAME SCAN Done\n");
1223 if (afx_hdl->peer_chan == P2P_INVALID_CHANNEL)
1224 complete(&afx_hdl->act_frm_scan);
1225 return true;
1226 }
1227
1228 ie = ((u8 *)bi) + le16_to_cpu(bi->ie_offset);
1229 memset(p2p_dev_addr, 0, sizeof(p2p_dev_addr));
1230 err = cfg80211_get_p2p_attr(ie, le32_to_cpu(bi->ie_length),
1231 IEEE80211_P2P_ATTR_DEVICE_INFO,
1232 p2p_dev_addr, sizeof(p2p_dev_addr));
1233 if (err < 0)
1234 err = cfg80211_get_p2p_attr(ie, le32_to_cpu(bi->ie_length),
1235 IEEE80211_P2P_ATTR_DEVICE_ID,
1236 p2p_dev_addr, sizeof(p2p_dev_addr));
1237 if ((err >= 0) &&
1238 (ether_addr_equal(p2p_dev_addr, afx_hdl->tx_dst_addr))) {
1239 if (!bi->ctl_ch) {
1240 ch.chspec = le16_to_cpu(bi->chanspec);
1241 cfg->d11inf.decchspec(&ch);
1242 bi->ctl_ch = ch.control_ch_num;
1243 }
1244 afx_hdl->peer_chan = bi->ctl_ch;
1245 brcmf_dbg(TRACE, "ACTION FRAME SCAN : Peer %pM found, channel : %d\n",
1246 afx_hdl->tx_dst_addr, afx_hdl->peer_chan);
1247 complete(&afx_hdl->act_frm_scan);
1248 }
1249 return true;
1250 }
1251
1252 /**
1253 * brcmf_p2p_stop_wait_next_action_frame() - finish scan if af tx complete.
1254 *
1255 * @cfg: common configuration struct.
1256 *
1257 */
1258 static void
1259 brcmf_p2p_stop_wait_next_action_frame(struct brcmf_cfg80211_info *cfg)
1260 {
1261 struct brcmf_p2p_info *p2p = &cfg->p2p;
1262 struct brcmf_if *ifp = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->ifp;
1263
1264 if (test_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status) &&
1265 (test_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status) ||
1266 test_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status))) {
1267 brcmf_dbg(TRACE, "*** Wake UP ** abort actframe iovar\n");
1268 /* if channel is not zero, "actfame" uses off channel scan.
1269 * So abort scan for off channel completion.
1270 */
1271 if (p2p->af_sent_channel)
1272 brcmf_notify_escan_complete(cfg, ifp, true, true);
1273 } else if (test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_AF_LISTEN,
1274 &p2p->status)) {
1275 brcmf_dbg(TRACE, "*** Wake UP ** abort listen for next af frame\n");
1276 /* So abort scan to cancel listen */
1277 brcmf_notify_escan_complete(cfg, ifp, true, true);
1278 }
1279 }
1280
1281
1282 /**
1283 * brcmf_p2p_gon_req_collision() - Check if go negotiaton collission
1284 *
1285 * @p2p: p2p device info struct.
1286 *
1287 * return true if recevied action frame is to be dropped.
1288 */
1289 static bool
1290 brcmf_p2p_gon_req_collision(struct brcmf_p2p_info *p2p, u8 *mac)
1291 {
1292 struct brcmf_cfg80211_info *cfg = p2p->cfg;
1293 struct brcmf_if *ifp;
1294
1295 brcmf_dbg(TRACE, "Enter\n");
1296
1297 if (!test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status) ||
1298 !p2p->gon_req_action)
1299 return false;
1300
1301 brcmf_dbg(TRACE, "GO Negotiation Request COLLISION !!!\n");
1302 /* if sa(peer) addr is less than da(my) addr, then this device
1303 * process peer's gon request and block to send gon req.
1304 * if not (sa addr > da addr),
1305 * this device will process gon request and drop gon req of peer.
1306 */
1307 ifp = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif->ifp;
1308 if (memcmp(mac, ifp->mac_addr, ETH_ALEN) < 0) {
1309 brcmf_dbg(INFO, "Block transmit gon req !!!\n");
1310 p2p->block_gon_req_tx = true;
1311 /* if we are finding a common channel for sending af,
1312 * do not scan more to block to send current gon req
1313 */
1314 if (test_and_clear_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL,
1315 &p2p->status))
1316 complete(&p2p->afx_hdl.act_frm_scan);
1317 if (test_and_clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME,
1318 &p2p->status))
1319 brcmf_p2p_stop_wait_next_action_frame(cfg);
1320 return false;
1321 }
1322
1323 /* drop gon request of peer to process gon request by this device. */
1324 brcmf_dbg(INFO, "Drop received gon req !!!\n");
1325
1326 return true;
1327 }
1328
1329
1330 /**
1331 * brcmf_p2p_notify_action_frame_rx() - received action frame.
1332 *
1333 * @ifp: interfac control.
1334 * @e: event message. Not used, to make it usable for fweh event dispatcher.
1335 * @data: payload of message, containing action frame data.
1336 *
1337 */
1338 int brcmf_p2p_notify_action_frame_rx(struct brcmf_if *ifp,
1339 const struct brcmf_event_msg *e,
1340 void *data)
1341 {
1342 struct brcmf_cfg80211_info *cfg = ifp->drvr->config;
1343 struct brcmf_p2p_info *p2p = &cfg->p2p;
1344 struct afx_hdl *afx_hdl = &p2p->afx_hdl;
1345 struct wireless_dev *wdev;
1346 u32 mgmt_frame_len = e->datalen - sizeof(struct brcmf_rx_mgmt_data);
1347 struct brcmf_rx_mgmt_data *rxframe = (struct brcmf_rx_mgmt_data *)data;
1348 u8 *frame = (u8 *)(rxframe + 1);
1349 struct brcmf_p2p_pub_act_frame *act_frm;
1350 struct brcmf_p2psd_gas_pub_act_frame *sd_act_frm;
1351 struct brcmu_chan ch;
1352 struct ieee80211_mgmt *mgmt_frame;
1353 s32 freq;
1354 u16 mgmt_type;
1355 u8 action;
1356
1357 if (e->datalen < sizeof(*rxframe)) {
1358 brcmf_dbg(SCAN, "Event data to small. Ignore\n");
1359 return 0;
1360 }
1361
1362 ch.chspec = be16_to_cpu(rxframe->chanspec);
1363 cfg->d11inf.decchspec(&ch);
1364 /* Check if wpa_supplicant has registered for this frame */
1365 brcmf_dbg(INFO, "ifp->vif->mgmt_rx_reg %04x\n", ifp->vif->mgmt_rx_reg);
1366 mgmt_type = (IEEE80211_STYPE_ACTION & IEEE80211_FCTL_STYPE) >> 4;
1367 if ((ifp->vif->mgmt_rx_reg & BIT(mgmt_type)) == 0)
1368 return 0;
1369
1370 brcmf_p2p_print_actframe(false, frame, mgmt_frame_len);
1371
1372 action = P2P_PAF_SUBTYPE_INVALID;
1373 if (brcmf_p2p_is_pub_action(frame, mgmt_frame_len)) {
1374 act_frm = (struct brcmf_p2p_pub_act_frame *)frame;
1375 action = act_frm->subtype;
1376 if ((action == P2P_PAF_GON_REQ) &&
1377 (brcmf_p2p_gon_req_collision(p2p, (u8 *)e->addr))) {
1378 if (test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL,
1379 &p2p->status) &&
1380 (ether_addr_equal(afx_hdl->tx_dst_addr, e->addr))) {
1381 afx_hdl->peer_chan = ch.control_ch_num;
1382 brcmf_dbg(INFO, "GON request: Peer found, channel=%d\n",
1383 afx_hdl->peer_chan);
1384 complete(&afx_hdl->act_frm_scan);
1385 }
1386 return 0;
1387 }
1388 /* After complete GO Negotiation, roll back to mpc mode */
1389 if ((action == P2P_PAF_GON_CONF) ||
1390 (action == P2P_PAF_PROVDIS_RSP))
1391 brcmf_set_mpc(ifp, 1);
1392 if (action == P2P_PAF_GON_CONF) {
1393 brcmf_dbg(TRACE, "P2P: GO_NEG_PHASE status cleared\n");
1394 clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status);
1395 }
1396 } else if (brcmf_p2p_is_gas_action(frame, mgmt_frame_len)) {
1397 sd_act_frm = (struct brcmf_p2psd_gas_pub_act_frame *)frame;
1398 action = sd_act_frm->action;
1399 }
1400
1401 if (test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status) &&
1402 (p2p->next_af_subtype == action)) {
1403 brcmf_dbg(TRACE, "We got a right next frame! (%d)\n", action);
1404 clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME,
1405 &p2p->status);
1406 /* Stop waiting for next AF. */
1407 brcmf_p2p_stop_wait_next_action_frame(cfg);
1408 }
1409
1410 mgmt_frame = kzalloc(offsetof(struct ieee80211_mgmt, u) +
1411 mgmt_frame_len, GFP_KERNEL);
1412 if (!mgmt_frame) {
1413 brcmf_err("No memory available for action frame\n");
1414 return -ENOMEM;
1415 }
1416 memcpy(mgmt_frame->da, ifp->mac_addr, ETH_ALEN);
1417 brcmf_fil_cmd_data_get(ifp, BRCMF_C_GET_BSSID, mgmt_frame->bssid,
1418 ETH_ALEN);
1419 memcpy(mgmt_frame->sa, e->addr, ETH_ALEN);
1420 mgmt_frame->frame_control = cpu_to_le16(IEEE80211_STYPE_ACTION);
1421 memcpy(&mgmt_frame->u, frame, mgmt_frame_len);
1422 mgmt_frame_len += offsetof(struct ieee80211_mgmt, u);
1423
1424 freq = ieee80211_channel_to_frequency(ch.control_ch_num,
1425 ch.band == BRCMU_CHAN_BAND_2G ?
1426 NL80211_BAND_2GHZ :
1427 NL80211_BAND_5GHZ);
1428
1429 wdev = &ifp->vif->wdev;
1430 cfg80211_rx_mgmt(wdev, freq, 0, (u8 *)mgmt_frame, mgmt_frame_len, 0);
1431
1432 kfree(mgmt_frame);
1433 return 0;
1434 }
1435
1436
1437 /**
1438 * brcmf_p2p_notify_action_tx_complete() - transmit action frame complete
1439 *
1440 * @ifp: interfac control.
1441 * @e: event message. Not used, to make it usable for fweh event dispatcher.
1442 * @data: not used.
1443 *
1444 */
1445 int brcmf_p2p_notify_action_tx_complete(struct brcmf_if *ifp,
1446 const struct brcmf_event_msg *e,
1447 void *data)
1448 {
1449 struct brcmf_cfg80211_info *cfg = ifp->drvr->config;
1450 struct brcmf_p2p_info *p2p = &cfg->p2p;
1451
1452 brcmf_dbg(INFO, "Enter: event %s, status=%d\n",
1453 e->event_code == BRCMF_E_ACTION_FRAME_OFF_CHAN_COMPLETE ?
1454 "ACTION_FRAME_OFF_CHAN_COMPLETE" : "ACTION_FRAME_COMPLETE",
1455 e->status);
1456
1457 if (!test_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status))
1458 return 0;
1459
1460 if (e->event_code == BRCMF_E_ACTION_FRAME_COMPLETE) {
1461 if (e->status == BRCMF_E_STATUS_SUCCESS)
1462 set_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED,
1463 &p2p->status);
1464 else {
1465 set_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status);
1466 /* If there is no ack, we don't need to wait for
1467 * WLC_E_ACTION_FRAME_OFFCHAN_COMPLETE event
1468 */
1469 brcmf_p2p_stop_wait_next_action_frame(cfg);
1470 }
1471
1472 } else {
1473 complete(&p2p->send_af_done);
1474 }
1475 return 0;
1476 }
1477
1478
1479 /**
1480 * brcmf_p2p_tx_action_frame() - send action frame over fil.
1481 *
1482 * @p2p: p2p info struct for vif.
1483 * @af_params: action frame data/info.
1484 *
1485 * Send an action frame immediately without doing channel synchronization.
1486 *
1487 * This function waits for a completion event before returning.
1488 * The WLC_E_ACTION_FRAME_COMPLETE event will be received when the action
1489 * frame is transmitted.
1490 */
1491 static s32 brcmf_p2p_tx_action_frame(struct brcmf_p2p_info *p2p,
1492 struct brcmf_fil_af_params_le *af_params)
1493 {
1494 struct brcmf_cfg80211_vif *vif;
1495 s32 err = 0;
1496 s32 timeout = 0;
1497
1498 brcmf_dbg(TRACE, "Enter\n");
1499
1500 reinit_completion(&p2p->send_af_done);
1501 clear_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status);
1502 clear_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status);
1503
1504 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif;
1505 err = brcmf_fil_bsscfg_data_set(vif->ifp, "actframe", af_params,
1506 sizeof(*af_params));
1507 if (err) {
1508 brcmf_err(" sending action frame has failed\n");
1509 goto exit;
1510 }
1511
1512 p2p->af_sent_channel = le32_to_cpu(af_params->channel);
1513 p2p->af_tx_sent_jiffies = jiffies;
1514
1515 timeout = wait_for_completion_timeout(&p2p->send_af_done,
1516 P2P_AF_MAX_WAIT_TIME);
1517
1518 if (test_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status)) {
1519 brcmf_dbg(TRACE, "TX action frame operation is success\n");
1520 } else {
1521 err = -EIO;
1522 brcmf_dbg(TRACE, "TX action frame operation has failed\n");
1523 }
1524 /* clear status bit for action tx */
1525 clear_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status);
1526 clear_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status);
1527
1528 exit:
1529 return err;
1530 }
1531
1532
1533 /**
1534 * brcmf_p2p_pub_af_tx() - public action frame tx routine.
1535 *
1536 * @cfg: driver private data for cfg80211 interface.
1537 * @af_params: action frame data/info.
1538 * @config_af_params: configuration data for action frame.
1539 *
1540 * routine which transmits ation frame public type.
1541 */
1542 static s32 brcmf_p2p_pub_af_tx(struct brcmf_cfg80211_info *cfg,
1543 struct brcmf_fil_af_params_le *af_params,
1544 struct brcmf_config_af_params *config_af_params)
1545 {
1546 struct brcmf_p2p_info *p2p = &cfg->p2p;
1547 struct brcmf_fil_action_frame_le *action_frame;
1548 struct brcmf_p2p_pub_act_frame *act_frm;
1549 s32 err = 0;
1550 u16 ie_len;
1551
1552 action_frame = &af_params->action_frame;
1553 act_frm = (struct brcmf_p2p_pub_act_frame *)(action_frame->data);
1554
1555 config_af_params->extra_listen = true;
1556
1557 switch (act_frm->subtype) {
1558 case P2P_PAF_GON_REQ:
1559 brcmf_dbg(TRACE, "P2P: GO_NEG_PHASE status set\n");
1560 set_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status);
1561 config_af_params->mpc_onoff = 0;
1562 config_af_params->search_channel = true;
1563 p2p->next_af_subtype = act_frm->subtype + 1;
1564 p2p->gon_req_action = true;
1565 /* increase dwell time to wait for RESP frame */
1566 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME);
1567 break;
1568 case P2P_PAF_GON_RSP:
1569 p2p->next_af_subtype = act_frm->subtype + 1;
1570 /* increase dwell time to wait for CONF frame */
1571 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME);
1572 break;
1573 case P2P_PAF_GON_CONF:
1574 /* If we reached till GO Neg confirmation reset the filter */
1575 brcmf_dbg(TRACE, "P2P: GO_NEG_PHASE status cleared\n");
1576 clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status);
1577 /* turn on mpc again if go nego is done */
1578 config_af_params->mpc_onoff = 1;
1579 /* minimize dwell time */
1580 af_params->dwell_time = cpu_to_le32(P2P_AF_MIN_DWELL_TIME);
1581 config_af_params->extra_listen = false;
1582 break;
1583 case P2P_PAF_INVITE_REQ:
1584 config_af_params->search_channel = true;
1585 p2p->next_af_subtype = act_frm->subtype + 1;
1586 /* increase dwell time */
1587 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME);
1588 break;
1589 case P2P_PAF_INVITE_RSP:
1590 /* minimize dwell time */
1591 af_params->dwell_time = cpu_to_le32(P2P_AF_MIN_DWELL_TIME);
1592 config_af_params->extra_listen = false;
1593 break;
1594 case P2P_PAF_DEVDIS_REQ:
1595 config_af_params->search_channel = true;
1596 p2p->next_af_subtype = act_frm->subtype + 1;
1597 /* maximize dwell time to wait for RESP frame */
1598 af_params->dwell_time = cpu_to_le32(P2P_AF_LONG_DWELL_TIME);
1599 break;
1600 case P2P_PAF_DEVDIS_RSP:
1601 /* minimize dwell time */
1602 af_params->dwell_time = cpu_to_le32(P2P_AF_MIN_DWELL_TIME);
1603 config_af_params->extra_listen = false;
1604 break;
1605 case P2P_PAF_PROVDIS_REQ:
1606 ie_len = le16_to_cpu(action_frame->len) -
1607 offsetof(struct brcmf_p2p_pub_act_frame, elts);
1608 if (cfg80211_get_p2p_attr(&act_frm->elts[0], ie_len,
1609 IEEE80211_P2P_ATTR_GROUP_ID,
1610 NULL, 0) < 0)
1611 config_af_params->search_channel = true;
1612 config_af_params->mpc_onoff = 0;
1613 p2p->next_af_subtype = act_frm->subtype + 1;
1614 /* increase dwell time to wait for RESP frame */
1615 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME);
1616 break;
1617 case P2P_PAF_PROVDIS_RSP:
1618 /* wpa_supplicant send go nego req right after prov disc */
1619 p2p->next_af_subtype = P2P_PAF_GON_REQ;
1620 /* increase dwell time to MED level */
1621 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME);
1622 config_af_params->extra_listen = false;
1623 break;
1624 default:
1625 brcmf_err("Unknown p2p pub act frame subtype: %d\n",
1626 act_frm->subtype);
1627 err = -EINVAL;
1628 }
1629 return err;
1630 }
1631
1632 /**
1633 * brcmf_p2p_send_action_frame() - send action frame .
1634 *
1635 * @cfg: driver private data for cfg80211 interface.
1636 * @ndev: net device to transmit on.
1637 * @af_params: configuration data for action frame.
1638 */
1639 bool brcmf_p2p_send_action_frame(struct brcmf_cfg80211_info *cfg,
1640 struct net_device *ndev,
1641 struct brcmf_fil_af_params_le *af_params)
1642 {
1643 struct brcmf_p2p_info *p2p = &cfg->p2p;
1644 struct brcmf_if *ifp = netdev_priv(ndev);
1645 struct brcmf_fil_action_frame_le *action_frame;
1646 struct brcmf_config_af_params config_af_params;
1647 struct afx_hdl *afx_hdl = &p2p->afx_hdl;
1648 u16 action_frame_len;
1649 bool ack = false;
1650 u8 category;
1651 u8 action;
1652 s32 tx_retry;
1653 s32 extra_listen_time;
1654 uint delta_ms;
1655
1656 action_frame = &af_params->action_frame;
1657 action_frame_len = le16_to_cpu(action_frame->len);
1658
1659 brcmf_p2p_print_actframe(true, action_frame->data, action_frame_len);
1660
1661 /* Add the default dwell time. Dwell time to stay off-channel */
1662 /* to wait for a response action frame after transmitting an */
1663 /* GO Negotiation action frame */
1664 af_params->dwell_time = cpu_to_le32(P2P_AF_DWELL_TIME);
1665
1666 category = action_frame->data[DOT11_ACTION_CAT_OFF];
1667 action = action_frame->data[DOT11_ACTION_ACT_OFF];
1668
1669 /* initialize variables */
1670 p2p->next_af_subtype = P2P_PAF_SUBTYPE_INVALID;
1671 p2p->gon_req_action = false;
1672
1673 /* config parameters */
1674 config_af_params.mpc_onoff = -1;
1675 config_af_params.search_channel = false;
1676 config_af_params.extra_listen = false;
1677
1678 if (brcmf_p2p_is_pub_action(action_frame->data, action_frame_len)) {
1679 /* p2p public action frame process */
1680 if (brcmf_p2p_pub_af_tx(cfg, af_params, &config_af_params)) {
1681 /* Just send unknown subtype frame with */
1682 /* default parameters. */
1683 brcmf_err("P2P Public action frame, unknown subtype.\n");
1684 }
1685 } else if (brcmf_p2p_is_gas_action(action_frame->data,
1686 action_frame_len)) {
1687 /* service discovery process */
1688 if (action == P2PSD_ACTION_ID_GAS_IREQ ||
1689 action == P2PSD_ACTION_ID_GAS_CREQ) {
1690 /* configure service discovery query frame */
1691 config_af_params.search_channel = true;
1692
1693 /* save next af suptype to cancel */
1694 /* remaining dwell time */
1695 p2p->next_af_subtype = action + 1;
1696
1697 af_params->dwell_time =
1698 cpu_to_le32(P2P_AF_MED_DWELL_TIME);
1699 } else if (action == P2PSD_ACTION_ID_GAS_IRESP ||
1700 action == P2PSD_ACTION_ID_GAS_CRESP) {
1701 /* configure service discovery response frame */
1702 af_params->dwell_time =
1703 cpu_to_le32(P2P_AF_MIN_DWELL_TIME);
1704 } else {
1705 brcmf_err("Unknown action type: %d\n", action);
1706 goto exit;
1707 }
1708 } else if (brcmf_p2p_is_p2p_action(action_frame->data,
1709 action_frame_len)) {
1710 /* do not configure anything. it will be */
1711 /* sent with a default configuration */
1712 } else {
1713 brcmf_err("Unknown Frame: category 0x%x, action 0x%x\n",
1714 category, action);
1715 return false;
1716 }
1717
1718 /* if connecting on primary iface, sleep for a while before sending
1719 * af tx for VSDB
1720 */
1721 if (test_bit(BRCMF_VIF_STATUS_CONNECTING,
1722 &p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->sme_state))
1723 msleep(50);
1724
1725 /* if scan is ongoing, abort current scan. */
1726 if (test_bit(BRCMF_SCAN_STATUS_BUSY, &cfg->scan_status))
1727 brcmf_abort_scanning(cfg);
1728
1729 memcpy(afx_hdl->tx_dst_addr, action_frame->da, ETH_ALEN);
1730
1731 /* To make sure to send successfully action frame, turn off mpc */
1732 if (config_af_params.mpc_onoff == 0)
1733 brcmf_set_mpc(ifp, 0);
1734
1735 /* set status and destination address before sending af */
1736 if (p2p->next_af_subtype != P2P_PAF_SUBTYPE_INVALID) {
1737 /* set status to cancel the remained dwell time in rx process */
1738 set_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status);
1739 }
1740
1741 p2p->af_sent_channel = 0;
1742 set_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status);
1743 /* validate channel and p2p ies */
1744 if (config_af_params.search_channel &&
1745 IS_P2P_SOCIAL_CHANNEL(le32_to_cpu(af_params->channel)) &&
1746 p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif->saved_ie.probe_req_ie_len) {
1747 afx_hdl = &p2p->afx_hdl;
1748 afx_hdl->peer_listen_chan = le32_to_cpu(af_params->channel);
1749
1750 if (brcmf_p2p_af_searching_channel(p2p) ==
1751 P2P_INVALID_CHANNEL) {
1752 brcmf_err("Couldn't find peer's channel.\n");
1753 goto exit;
1754 }
1755
1756 /* Abort scan even for VSDB scenarios. Scan gets aborted in
1757 * firmware but after the check of piggyback algorithm. To take
1758 * care of current piggback algo, lets abort the scan here
1759 * itself.
1760 */
1761 brcmf_notify_escan_complete(cfg, ifp, true, true);
1762
1763 /* update channel */
1764 af_params->channel = cpu_to_le32(afx_hdl->peer_chan);
1765 }
1766
1767 tx_retry = 0;
1768 while (!p2p->block_gon_req_tx &&
1769 (ack == false) && (tx_retry < P2P_AF_TX_MAX_RETRY)) {
1770 ack = !brcmf_p2p_tx_action_frame(p2p, af_params);
1771 tx_retry++;
1772 }
1773 if (ack == false) {
1774 brcmf_err("Failed to send Action Frame(retry %d)\n", tx_retry);
1775 clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status);
1776 }
1777
1778 exit:
1779 clear_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status);
1780
1781 /* WAR: sometimes dongle does not keep the dwell time of 'actframe'.
1782 * if we coundn't get the next action response frame and dongle does
1783 * not keep the dwell time, go to listen state again to get next action
1784 * response frame.
1785 */
1786 if (ack && config_af_params.extra_listen && !p2p->block_gon_req_tx &&
1787 test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status) &&
1788 p2p->af_sent_channel == afx_hdl->my_listen_chan) {
1789 delta_ms = jiffies_to_msecs(jiffies - p2p->af_tx_sent_jiffies);
1790 if (le32_to_cpu(af_params->dwell_time) > delta_ms)
1791 extra_listen_time = le32_to_cpu(af_params->dwell_time) -
1792 delta_ms;
1793 else
1794 extra_listen_time = 0;
1795 if (extra_listen_time > 50) {
1796 set_bit(BRCMF_P2P_STATUS_WAITING_NEXT_AF_LISTEN,
1797 &p2p->status);
1798 brcmf_dbg(INFO, "Wait more time! actual af time:%d, calculated extra listen:%d\n",
1799 le32_to_cpu(af_params->dwell_time),
1800 extra_listen_time);
1801 extra_listen_time += 100;
1802 if (!brcmf_p2p_discover_listen(p2p,
1803 p2p->af_sent_channel,
1804 extra_listen_time)) {
1805 unsigned long duration;
1806
1807 extra_listen_time += 100;
1808 duration = msecs_to_jiffies(extra_listen_time);
1809 wait_for_completion_timeout(&p2p->wait_next_af,
1810 duration);
1811 }
1812 clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_AF_LISTEN,
1813 &p2p->status);
1814 }
1815 }
1816
1817 if (p2p->block_gon_req_tx) {
1818 /* if ack is true, supplicant will wait more time(100ms).
1819 * so we will return it as a success to get more time .
1820 */
1821 p2p->block_gon_req_tx = false;
1822 ack = true;
1823 }
1824
1825 clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status);
1826 /* if all done, turn mpc on again */
1827 if (config_af_params.mpc_onoff == 1)
1828 brcmf_set_mpc(ifp, 1);
1829
1830 return ack;
1831 }
1832
1833 /**
1834 * brcmf_p2p_notify_rx_mgmt_p2p_probereq() - Event handler for p2p probe req.
1835 *
1836 * @ifp: interface pointer for which event was received.
1837 * @e: even message.
1838 * @data: payload of event message (probe request).
1839 */
1840 s32 brcmf_p2p_notify_rx_mgmt_p2p_probereq(struct brcmf_if *ifp,
1841 const struct brcmf_event_msg *e,
1842 void *data)
1843 {
1844 struct brcmf_cfg80211_info *cfg = ifp->drvr->config;
1845 struct brcmf_p2p_info *p2p = &cfg->p2p;
1846 struct afx_hdl *afx_hdl = &p2p->afx_hdl;
1847 struct brcmf_cfg80211_vif *vif = ifp->vif;
1848 struct brcmf_rx_mgmt_data *rxframe = (struct brcmf_rx_mgmt_data *)data;
1849 struct brcmu_chan ch;
1850 u8 *mgmt_frame;
1851 u32 mgmt_frame_len;
1852 s32 freq;
1853 u16 mgmt_type;
1854
1855 brcmf_dbg(INFO, "Enter: event %d reason %d\n", e->event_code,
1856 e->reason);
1857
1858 if (e->datalen < sizeof(*rxframe)) {
1859 brcmf_dbg(SCAN, "Event data to small. Ignore\n");
1860 return 0;
1861 }
1862
1863 ch.chspec = be16_to_cpu(rxframe->chanspec);
1864 cfg->d11inf.decchspec(&ch);
1865
1866 if (test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status) &&
1867 (ether_addr_equal(afx_hdl->tx_dst_addr, e->addr))) {
1868 afx_hdl->peer_chan = ch.control_ch_num;
1869 brcmf_dbg(INFO, "PROBE REQUEST: Peer found, channel=%d\n",
1870 afx_hdl->peer_chan);
1871 complete(&afx_hdl->act_frm_scan);
1872 }
1873
1874 /* Firmware sends us two proberesponses for each idx one. At the */
1875 /* moment anything but bsscfgidx 0 is passed up to supplicant */
1876 if (e->bsscfgidx == 0)
1877 return 0;
1878
1879 /* Filter any P2P probe reqs arriving during the GO-NEG Phase */
1880 if (test_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status)) {
1881 brcmf_dbg(INFO, "Filtering P2P probe_req in GO-NEG phase\n");
1882 return 0;
1883 }
1884
1885 /* Check if wpa_supplicant has registered for this frame */
1886 brcmf_dbg(INFO, "vif->mgmt_rx_reg %04x\n", vif->mgmt_rx_reg);
1887 mgmt_type = (IEEE80211_STYPE_PROBE_REQ & IEEE80211_FCTL_STYPE) >> 4;
1888 if ((vif->mgmt_rx_reg & BIT(mgmt_type)) == 0)
1889 return 0;
1890
1891 mgmt_frame = (u8 *)(rxframe + 1);
1892 mgmt_frame_len = e->datalen - sizeof(*rxframe);
1893 freq = ieee80211_channel_to_frequency(ch.control_ch_num,
1894 ch.band == BRCMU_CHAN_BAND_2G ?
1895 NL80211_BAND_2GHZ :
1896 NL80211_BAND_5GHZ);
1897
1898 cfg80211_rx_mgmt(&vif->wdev, freq, 0, mgmt_frame, mgmt_frame_len, 0);
1899
1900 brcmf_dbg(INFO, "mgmt_frame_len (%d) , e->datalen (%d), chanspec (%04x), freq (%d)\n",
1901 mgmt_frame_len, e->datalen, ch.chspec, freq);
1902
1903 return 0;
1904 }
1905
1906
1907 /**
1908 * brcmf_p2p_get_current_chanspec() - Get current operation channel.
1909 *
1910 * @p2p: P2P specific data.
1911 * @chanspec: chanspec to be returned.
1912 */
1913 static void brcmf_p2p_get_current_chanspec(struct brcmf_p2p_info *p2p,
1914 u16 *chanspec)
1915 {
1916 struct brcmf_if *ifp;
1917 u8 mac_addr[ETH_ALEN];
1918 struct brcmu_chan ch;
1919 struct brcmf_bss_info_le *bi;
1920 u8 *buf;
1921
1922 ifp = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->ifp;
1923
1924 if (brcmf_fil_cmd_data_get(ifp, BRCMF_C_GET_BSSID, mac_addr,
1925 ETH_ALEN) == 0) {
1926 buf = kzalloc(WL_BSS_INFO_MAX, GFP_KERNEL);
1927 if (buf != NULL) {
1928 *(__le32 *)buf = cpu_to_le32(WL_BSS_INFO_MAX);
1929 if (brcmf_fil_cmd_data_get(ifp, BRCMF_C_GET_BSS_INFO,
1930 buf, WL_BSS_INFO_MAX) == 0) {
1931 bi = (struct brcmf_bss_info_le *)(buf + 4);
1932 *chanspec = le16_to_cpu(bi->chanspec);
1933 kfree(buf);
1934 return;
1935 }
1936 kfree(buf);
1937 }
1938 }
1939 /* Use default channel for P2P */
1940 ch.chnum = BRCMF_P2P_TEMP_CHAN;
1941 ch.bw = BRCMU_CHAN_BW_20;
1942 p2p->cfg->d11inf.encchspec(&ch);
1943 *chanspec = ch.chspec;
1944 }
1945
1946 /**
1947 * Change a P2P Role.
1948 * Parameters:
1949 * @mac: MAC address of the BSS to change a role
1950 * Returns 0 if success.
1951 */
1952 int brcmf_p2p_ifchange(struct brcmf_cfg80211_info *cfg,
1953 enum brcmf_fil_p2p_if_types if_type)
1954 {
1955 struct brcmf_p2p_info *p2p = &cfg->p2p;
1956 struct brcmf_cfg80211_vif *vif;
1957 struct brcmf_fil_p2p_if_le if_request;
1958 s32 err;
1959 u16 chanspec;
1960
1961 brcmf_dbg(TRACE, "Enter\n");
1962
1963 vif = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif;
1964 if (!vif) {
1965 brcmf_err("vif for P2PAPI_BSSCFG_PRIMARY does not exist\n");
1966 return -EPERM;
1967 }
1968 brcmf_notify_escan_complete(cfg, vif->ifp, true, true);
1969 vif = p2p->bss_idx[P2PAPI_BSSCFG_CONNECTION].vif;
1970 if (!vif) {
1971 brcmf_err("vif for P2PAPI_BSSCFG_CONNECTION does not exist\n");
1972 return -EPERM;
1973 }
1974 brcmf_set_mpc(vif->ifp, 0);
1975
1976 /* In concurrency case, STA may be already associated in a particular */
1977 /* channel. so retrieve the current channel of primary interface and */
1978 /* then start the virtual interface on that. */
1979 brcmf_p2p_get_current_chanspec(p2p, &chanspec);
1980
1981 if_request.type = cpu_to_le16((u16)if_type);
1982 if_request.chspec = cpu_to_le16(chanspec);
1983 memcpy(if_request.addr, p2p->int_addr, sizeof(if_request.addr));
1984
1985 brcmf_cfg80211_arm_vif_event(cfg, vif);
1986 err = brcmf_fil_iovar_data_set(vif->ifp, "p2p_ifupd", &if_request,
1987 sizeof(if_request));
1988 if (err) {
1989 brcmf_err("p2p_ifupd FAILED, err=%d\n", err);
1990 brcmf_cfg80211_arm_vif_event(cfg, NULL);
1991 return err;
1992 }
1993 err = brcmf_cfg80211_wait_vif_event(cfg, BRCMF_E_IF_CHANGE,
1994 BRCMF_VIF_EVENT_TIMEOUT);
1995 brcmf_cfg80211_arm_vif_event(cfg, NULL);
1996 if (!err) {
1997 brcmf_err("No BRCMF_E_IF_CHANGE event received\n");
1998 return -EIO;
1999 }
2000
2001 err = brcmf_fil_cmd_int_set(vif->ifp, BRCMF_C_SET_SCB_TIMEOUT,
2002 BRCMF_SCB_TIMEOUT_VALUE);
2003
2004 return err;
2005 }
2006
2007 static int brcmf_p2p_request_p2p_if(struct brcmf_p2p_info *p2p,
2008 struct brcmf_if *ifp, u8 ea[ETH_ALEN],
2009 enum brcmf_fil_p2p_if_types iftype)
2010 {
2011 struct brcmf_fil_p2p_if_le if_request;
2012 int err;
2013 u16 chanspec;
2014
2015 /* we need a default channel */
2016 brcmf_p2p_get_current_chanspec(p2p, &chanspec);
2017
2018 /* fill the firmware request */
2019 memcpy(if_request.addr, ea, ETH_ALEN);
2020 if_request.type = cpu_to_le16((u16)iftype);
2021 if_request.chspec = cpu_to_le16(chanspec);
2022
2023 err = brcmf_fil_iovar_data_set(ifp, "p2p_ifadd", &if_request,
2024 sizeof(if_request));
2025
2026 return err;
2027 }
2028
2029 static int brcmf_p2p_disable_p2p_if(struct brcmf_cfg80211_vif *vif)
2030 {
2031 struct brcmf_cfg80211_info *cfg = wdev_to_cfg(&vif->wdev);
2032 struct net_device *pri_ndev = cfg_to_ndev(cfg);
2033 struct brcmf_if *ifp = netdev_priv(pri_ndev);
2034 u8 *addr = vif->wdev.netdev->dev_addr;
2035
2036 return brcmf_fil_iovar_data_set(ifp, "p2p_ifdis", addr, ETH_ALEN);
2037 }
2038
2039 static int brcmf_p2p_release_p2p_if(struct brcmf_cfg80211_vif *vif)
2040 {
2041 struct brcmf_cfg80211_info *cfg = wdev_to_cfg(&vif->wdev);
2042 struct net_device *pri_ndev = cfg_to_ndev(cfg);
2043 struct brcmf_if *ifp = netdev_priv(pri_ndev);
2044 u8 *addr = vif->wdev.netdev->dev_addr;
2045
2046 return brcmf_fil_iovar_data_set(ifp, "p2p_ifdel", addr, ETH_ALEN);
2047 }
2048
2049 /**
2050 * brcmf_p2p_create_p2pdev() - create a P2P_DEVICE virtual interface.
2051 *
2052 * @p2p: P2P specific data.
2053 * @wiphy: wiphy device of new interface.
2054 * @addr: mac address for this new interface.
2055 */
2056 static struct wireless_dev *brcmf_p2p_create_p2pdev(struct brcmf_p2p_info *p2p,
2057 struct wiphy *wiphy,
2058 u8 *addr)
2059 {
2060 struct brcmf_cfg80211_vif *p2p_vif;
2061 struct brcmf_if *p2p_ifp;
2062 struct brcmf_if *pri_ifp;
2063 int err;
2064 u32 bsscfgidx;
2065
2066 if (p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif)
2067 return ERR_PTR(-ENOSPC);
2068
2069 p2p_vif = brcmf_alloc_vif(p2p->cfg, NL80211_IFTYPE_P2P_DEVICE);
2070 if (IS_ERR(p2p_vif)) {
2071 brcmf_err("could not create discovery vif\n");
2072 return (struct wireless_dev *)p2p_vif;
2073 }
2074
2075 pri_ifp = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->ifp;
2076 brcmf_p2p_generate_bss_mac(p2p, addr);
2077 brcmf_p2p_set_firmware(pri_ifp, p2p->dev_addr);
2078
2079 brcmf_cfg80211_arm_vif_event(p2p->cfg, p2p_vif);
2080 brcmf_fweh_p2pdev_setup(pri_ifp, true);
2081
2082 /* Initialize P2P Discovery in the firmware */
2083 err = brcmf_fil_iovar_int_set(pri_ifp, "p2p_disc", 1);
2084 if (err < 0) {
2085 brcmf_err("set p2p_disc error\n");
2086 brcmf_fweh_p2pdev_setup(pri_ifp, false);
2087 brcmf_cfg80211_arm_vif_event(p2p->cfg, NULL);
2088 goto fail;
2089 }
2090
2091 /* wait for firmware event */
2092 err = brcmf_cfg80211_wait_vif_event(p2p->cfg, BRCMF_E_IF_ADD,
2093 BRCMF_VIF_EVENT_TIMEOUT);
2094 brcmf_cfg80211_arm_vif_event(p2p->cfg, NULL);
2095 brcmf_fweh_p2pdev_setup(pri_ifp, false);
2096 if (!err) {
2097 brcmf_err("timeout occurred\n");
2098 err = -EIO;
2099 goto fail;
2100 }
2101
2102 /* discovery interface created */
2103 p2p_ifp = p2p_vif->ifp;
2104 p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif = p2p_vif;
2105 memcpy(p2p_ifp->mac_addr, p2p->dev_addr, ETH_ALEN);
2106 memcpy(&p2p_vif->wdev.address, p2p->dev_addr, sizeof(p2p->dev_addr));
2107
2108 /* verify bsscfg index for P2P discovery */
2109 err = brcmf_fil_iovar_int_get(pri_ifp, "p2p_dev", &bsscfgidx);
2110 if (err < 0) {
2111 brcmf_err("retrieving discover bsscfg index failed\n");
2112 goto fail;
2113 }
2114
2115 WARN_ON(p2p_ifp->bsscfgidx != bsscfgidx);
2116
2117 init_completion(&p2p->send_af_done);
2118 INIT_WORK(&p2p->afx_hdl.afx_work, brcmf_p2p_afx_handler);
2119 init_completion(&p2p->afx_hdl.act_frm_scan);
2120 init_completion(&p2p->wait_next_af);
2121
2122 return &p2p_vif->wdev;
2123
2124 fail:
2125 brcmf_free_vif(p2p_vif);
2126 return ERR_PTR(err);
2127 }
2128
2129 /**
2130 * brcmf_p2p_add_vif() - create a new P2P virtual interface.
2131 *
2132 * @wiphy: wiphy device of new interface.
2133 * @name: name of the new interface.
2134 * @name_assign_type: origin of the interface name
2135 * @type: nl80211 interface type.
2136 * @params: contains mac address for P2P device.
2137 */
2138 struct wireless_dev *brcmf_p2p_add_vif(struct wiphy *wiphy, const char *name,
2139 unsigned char name_assign_type,
2140 enum nl80211_iftype type,
2141 struct vif_params *params)
2142 {
2143 struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
2144 struct brcmf_if *ifp = netdev_priv(cfg_to_ndev(cfg));
2145 struct brcmf_cfg80211_vif *vif;
2146 enum brcmf_fil_p2p_if_types iftype;
2147 int err;
2148
2149 if (brcmf_cfg80211_vif_event_armed(cfg))
2150 return ERR_PTR(-EBUSY);
2151
2152 brcmf_dbg(INFO, "adding vif \"%s\" (type=%d)\n", name, type);
2153
2154 switch (type) {
2155 case NL80211_IFTYPE_P2P_CLIENT:
2156 iftype = BRCMF_FIL_P2P_IF_CLIENT;
2157 break;
2158 case NL80211_IFTYPE_P2P_GO:
2159 iftype = BRCMF_FIL_P2P_IF_GO;
2160 break;
2161 case NL80211_IFTYPE_P2P_DEVICE:
2162 return brcmf_p2p_create_p2pdev(&cfg->p2p, wiphy,
2163 params->macaddr);
2164 default:
2165 return ERR_PTR(-EOPNOTSUPP);
2166 }
2167
2168 vif = brcmf_alloc_vif(cfg, type);
2169 if (IS_ERR(vif))
2170 return (struct wireless_dev *)vif;
2171 brcmf_cfg80211_arm_vif_event(cfg, vif);
2172
2173 err = brcmf_p2p_request_p2p_if(&cfg->p2p, ifp, cfg->p2p.int_addr,
2174 iftype);
2175 if (err) {
2176 brcmf_cfg80211_arm_vif_event(cfg, NULL);
2177 goto fail;
2178 }
2179
2180 /* wait for firmware event */
2181 err = brcmf_cfg80211_wait_vif_event(cfg, BRCMF_E_IF_ADD,
2182 BRCMF_VIF_EVENT_TIMEOUT);
2183 brcmf_cfg80211_arm_vif_event(cfg, NULL);
2184 if (!err) {
2185 brcmf_err("timeout occurred\n");
2186 err = -EIO;
2187 goto fail;
2188 }
2189
2190 /* interface created in firmware */
2191 ifp = vif->ifp;
2192 if (!ifp) {
2193 brcmf_err("no if pointer provided\n");
2194 err = -ENOENT;
2195 goto fail;
2196 }
2197
2198 strncpy(ifp->ndev->name, name, sizeof(ifp->ndev->name) - 1);
2199 ifp->ndev->name_assign_type = name_assign_type;
2200 err = brcmf_net_attach(ifp, true);
2201 if (err) {
2202 brcmf_err("Registering netdevice failed\n");
2203 free_netdev(ifp->ndev);
2204 goto fail;
2205 }
2206
2207 cfg->p2p.bss_idx[P2PAPI_BSSCFG_CONNECTION].vif = vif;
2208 /* Disable firmware roaming for P2P interface */
2209 brcmf_fil_iovar_int_set(ifp, "roam_off", 1);
2210 if (iftype == BRCMF_FIL_P2P_IF_GO) {
2211 /* set station timeout for p2p */
2212 brcmf_fil_cmd_int_set(ifp, BRCMF_C_SET_SCB_TIMEOUT,
2213 BRCMF_SCB_TIMEOUT_VALUE);
2214 }
2215 return &ifp->vif->wdev;
2216
2217 fail:
2218 brcmf_free_vif(vif);
2219 return ERR_PTR(err);
2220 }
2221
2222 /**
2223 * brcmf_p2p_del_vif() - delete a P2P virtual interface.
2224 *
2225 * @wiphy: wiphy device of interface.
2226 * @wdev: wireless device of interface.
2227 */
2228 int brcmf_p2p_del_vif(struct wiphy *wiphy, struct wireless_dev *wdev)
2229 {
2230 struct brcmf_cfg80211_info *cfg = wiphy_priv(wiphy);
2231 struct brcmf_p2p_info *p2p = &cfg->p2p;
2232 struct brcmf_cfg80211_vif *vif;
2233 enum nl80211_iftype iftype;
2234 bool wait_for_disable = false;
2235 int err;
2236
2237 brcmf_dbg(TRACE, "delete P2P vif\n");
2238 vif = container_of(wdev, struct brcmf_cfg80211_vif, wdev);
2239
2240 iftype = vif->wdev.iftype;
2241 brcmf_cfg80211_arm_vif_event(cfg, vif);
2242 switch (iftype) {
2243 case NL80211_IFTYPE_P2P_CLIENT:
2244 if (test_bit(BRCMF_VIF_STATUS_DISCONNECTING, &vif->sme_state))
2245 wait_for_disable = true;
2246 break;
2247
2248 case NL80211_IFTYPE_P2P_GO:
2249 if (!brcmf_p2p_disable_p2p_if(vif))
2250 wait_for_disable = true;
2251 break;
2252
2253 case NL80211_IFTYPE_P2P_DEVICE:
2254 if (!p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif)
2255 return 0;
2256 brcmf_p2p_cancel_remain_on_channel(vif->ifp);
2257 brcmf_p2p_deinit_discovery(p2p);
2258 break;
2259
2260 default:
2261 return -ENOTSUPP;
2262 }
2263
2264 clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status);
2265 brcmf_dbg(INFO, "P2P: GO_NEG_PHASE status cleared\n");
2266
2267 if (wait_for_disable)
2268 wait_for_completion_timeout(&cfg->vif_disabled,
2269 BRCMF_P2P_DISABLE_TIMEOUT);
2270
2271 err = 0;
2272 if (iftype != NL80211_IFTYPE_P2P_DEVICE) {
2273 brcmf_vif_clear_mgmt_ies(vif);
2274 err = brcmf_p2p_release_p2p_if(vif);
2275 }
2276 if (!err) {
2277 /* wait for firmware event */
2278 err = brcmf_cfg80211_wait_vif_event(cfg, BRCMF_E_IF_DEL,
2279 BRCMF_VIF_EVENT_TIMEOUT);
2280 if (!err)
2281 err = -EIO;
2282 else
2283 err = 0;
2284 }
2285 brcmf_remove_interface(vif->ifp, true);
2286
2287 brcmf_cfg80211_arm_vif_event(cfg, NULL);
2288 if (iftype != NL80211_IFTYPE_P2P_DEVICE)
2289 p2p->bss_idx[P2PAPI_BSSCFG_CONNECTION].vif = NULL;
2290
2291 return err;
2292 }
2293
2294 void brcmf_p2p_ifp_removed(struct brcmf_if *ifp, bool rtnl_locked)
2295 {
2296 struct brcmf_cfg80211_info *cfg;
2297 struct brcmf_cfg80211_vif *vif;
2298
2299 brcmf_dbg(INFO, "P2P: device interface removed\n");
2300 vif = ifp->vif;
2301 cfg = wdev_to_cfg(&vif->wdev);
2302 cfg->p2p.bss_idx[P2PAPI_BSSCFG_DEVICE].vif = NULL;
2303 if (!rtnl_locked)
2304 rtnl_lock();
2305 cfg80211_unregister_wdev(&vif->wdev);
2306 if (!rtnl_locked)
2307 rtnl_unlock();
2308 brcmf_free_vif(vif);
2309 }
2310
2311 int brcmf_p2p_start_device(struct wiphy *wiphy, struct wireless_dev *wdev)
2312 {
2313 struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
2314 struct brcmf_p2p_info *p2p = &cfg->p2p;
2315 struct brcmf_cfg80211_vif *vif;
2316 int err;
2317
2318 vif = container_of(wdev, struct brcmf_cfg80211_vif, wdev);
2319 mutex_lock(&cfg->usr_sync);
2320 err = brcmf_p2p_enable_discovery(p2p);
2321 if (!err)
2322 set_bit(BRCMF_VIF_STATUS_READY, &vif->sme_state);
2323 mutex_unlock(&cfg->usr_sync);
2324 return err;
2325 }
2326
2327 void brcmf_p2p_stop_device(struct wiphy *wiphy, struct wireless_dev *wdev)
2328 {
2329 struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
2330 struct brcmf_p2p_info *p2p = &cfg->p2p;
2331 struct brcmf_cfg80211_vif *vif;
2332
2333 vif = container_of(wdev, struct brcmf_cfg80211_vif, wdev);
2334 /* This call can be result of the unregister_wdev call. In that case
2335 * we dont want to do anything anymore. Just return. The config vif
2336 * will have been cleared at this point.
2337 */
2338 if (p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif == vif) {
2339 mutex_lock(&cfg->usr_sync);
2340 /* Set the discovery state to SCAN */
2341 (void)brcmf_p2p_set_discover_state(vif->ifp,
2342 WL_P2P_DISC_ST_SCAN, 0, 0);
2343 brcmf_abort_scanning(cfg);
2344 clear_bit(BRCMF_VIF_STATUS_READY, &vif->sme_state);
2345 mutex_unlock(&cfg->usr_sync);
2346 }
2347 }
2348
2349 /**
2350 * brcmf_p2p_attach() - attach for P2P.
2351 *
2352 * @cfg: driver private data for cfg80211 interface.
2353 * @p2pdev_forced: create p2p device interface at attach.
2354 */
2355 s32 brcmf_p2p_attach(struct brcmf_cfg80211_info *cfg, bool p2pdev_forced)
2356 {
2357 struct brcmf_p2p_info *p2p;
2358 struct brcmf_if *pri_ifp;
2359 s32 err = 0;
2360 void *err_ptr;
2361
2362 p2p = &cfg->p2p;
2363 p2p->cfg = cfg;
2364
2365 pri_ifp = brcmf_get_ifp(cfg->pub, 0);
2366 p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif = pri_ifp->vif;
2367
2368 if (p2pdev_forced) {
2369 err_ptr = brcmf_p2p_create_p2pdev(p2p, NULL, NULL);
2370 if (IS_ERR(err_ptr)) {
2371 brcmf_err("P2P device creation failed.\n");
2372 err = PTR_ERR(err_ptr);
2373 }
2374 } else {
2375 p2p->p2pdev_dynamically = true;
2376 }
2377 return err;
2378 }
2379
2380 /**
2381 * brcmf_p2p_detach() - detach P2P.
2382 *
2383 * @p2p: P2P specific data.
2384 */
2385 void brcmf_p2p_detach(struct brcmf_p2p_info *p2p)
2386 {
2387 struct brcmf_cfg80211_vif *vif;
2388
2389 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif;
2390 if (vif != NULL) {
2391 brcmf_p2p_cancel_remain_on_channel(vif->ifp);
2392 brcmf_p2p_deinit_discovery(p2p);
2393 brcmf_remove_interface(vif->ifp, false);
2394 }
2395 /* just set it all to zero */
2396 memset(p2p, 0, sizeof(*p2p));
2397 }
2398
Linux with added FPC-III support