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Linux 4.19.133
[linux/fpc-iii.git] / drivers / net / wireless / broadcom / brcm80211 / brcmfmac / p2p.c
blob456a1bf008b3d62242b386f9547dc1899e555b34
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(450)
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 = kcalloc(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 s32 retry;
1138
1139 brcmf_dbg(TRACE, "Enter\n");
1140
1141 pri_vif = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif;
1142
1143 reinit_completion(&afx_hdl->act_frm_scan);
1144 set_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status);
1145 afx_hdl->is_active = true;
1146 afx_hdl->peer_chan = P2P_INVALID_CHANNEL;
1147
1148 /* Loop to wait until we find a peer's channel or the
1149 * pending action frame tx is cancelled.
1150 */
1151 retry = 0;
1152 while ((retry < P2P_CHANNEL_SYNC_RETRY) &&
1153 (afx_hdl->peer_chan == P2P_INVALID_CHANNEL)) {
1154 afx_hdl->is_listen = false;
1155 brcmf_dbg(TRACE, "Scheduling action frame for sending.. (%d)\n",
1156 retry);
1157 /* search peer on peer's listen channel */
1158 schedule_work(&afx_hdl->afx_work);
1159 wait_for_completion_timeout(&afx_hdl->act_frm_scan,
1160 P2P_AF_FRM_SCAN_MAX_WAIT);
1161 if ((afx_hdl->peer_chan != P2P_INVALID_CHANNEL) ||
1162 (!test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL,
1163 &p2p->status)))
1164 break;
1165
1166 if (afx_hdl->my_listen_chan) {
1167 brcmf_dbg(TRACE, "Scheduling listen peer, channel=%d\n",
1168 afx_hdl->my_listen_chan);
1169 /* listen on my listen channel */
1170 afx_hdl->is_listen = true;
1171 schedule_work(&afx_hdl->afx_work);
1172 wait_for_completion_timeout(&afx_hdl->act_frm_scan,
1173 P2P_AF_FRM_SCAN_MAX_WAIT);
1174 }
1175 if ((afx_hdl->peer_chan != P2P_INVALID_CHANNEL) ||
1176 (!test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL,
1177 &p2p->status)))
1178 break;
1179 retry++;
1180
1181 /* if sta is connected or connecting, sleep for a while before
1182 * retry af tx or finding a peer
1183 */
1184 if (test_bit(BRCMF_VIF_STATUS_CONNECTED, &pri_vif->sme_state) ||
1185 test_bit(BRCMF_VIF_STATUS_CONNECTING, &pri_vif->sme_state))
1186 msleep(P2P_DEFAULT_SLEEP_TIME_VSDB);
1187 }
1188
1189 brcmf_dbg(TRACE, "Completed search/listen peer_chan=%d\n",
1190 afx_hdl->peer_chan);
1191 afx_hdl->is_active = false;
1192
1193 clear_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status);
1194
1195 return afx_hdl->peer_chan;
1196 }
1197
1198
1199 /**
1200 * brcmf_p2p_scan_finding_common_channel() - was escan used for finding channel
1201 *
1202 * @cfg: common configuration struct.
1203 * @bi: bss info struct, result from scan.
1204 *
1205 */
1206 bool brcmf_p2p_scan_finding_common_channel(struct brcmf_cfg80211_info *cfg,
1207 struct brcmf_bss_info_le *bi)
1208
1209 {
1210 struct brcmf_p2p_info *p2p = &cfg->p2p;
1211 struct afx_hdl *afx_hdl = &p2p->afx_hdl;
1212 struct brcmu_chan ch;
1213 u8 *ie;
1214 s32 err;
1215 u8 p2p_dev_addr[ETH_ALEN];
1216
1217 if (!test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status))
1218 return false;
1219
1220 if (bi == NULL) {
1221 brcmf_dbg(TRACE, "ACTION FRAME SCAN Done\n");
1222 if (afx_hdl->peer_chan == P2P_INVALID_CHANNEL)
1223 complete(&afx_hdl->act_frm_scan);
1224 return true;
1225 }
1226
1227 ie = ((u8 *)bi) + le16_to_cpu(bi->ie_offset);
1228 memset(p2p_dev_addr, 0, sizeof(p2p_dev_addr));
1229 err = cfg80211_get_p2p_attr(ie, le32_to_cpu(bi->ie_length),
1230 IEEE80211_P2P_ATTR_DEVICE_INFO,
1231 p2p_dev_addr, sizeof(p2p_dev_addr));
1232 if (err < 0)
1233 err = cfg80211_get_p2p_attr(ie, le32_to_cpu(bi->ie_length),
1234 IEEE80211_P2P_ATTR_DEVICE_ID,
1235 p2p_dev_addr, sizeof(p2p_dev_addr));
1236 if ((err >= 0) &&
1237 (ether_addr_equal(p2p_dev_addr, afx_hdl->tx_dst_addr))) {
1238 if (!bi->ctl_ch) {
1239 ch.chspec = le16_to_cpu(bi->chanspec);
1240 cfg->d11inf.decchspec(&ch);
1241 bi->ctl_ch = ch.control_ch_num;
1242 }
1243 afx_hdl->peer_chan = bi->ctl_ch;
1244 brcmf_dbg(TRACE, "ACTION FRAME SCAN : Peer %pM found, channel : %d\n",
1245 afx_hdl->tx_dst_addr, afx_hdl->peer_chan);
1246 complete(&afx_hdl->act_frm_scan);
1247 }
1248 return true;
1249 }
1250
1251 /**
1252 * brcmf_p2p_stop_wait_next_action_frame() - finish scan if af tx complete.
1253 *
1254 * @cfg: common configuration struct.
1255 *
1256 */
1257 static void
1258 brcmf_p2p_stop_wait_next_action_frame(struct brcmf_cfg80211_info *cfg)
1259 {
1260 struct brcmf_p2p_info *p2p = &cfg->p2p;
1261 struct brcmf_if *ifp = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->ifp;
1262
1263 if (test_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status) &&
1264 (test_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status) ||
1265 test_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status))) {
1266 brcmf_dbg(TRACE, "*** Wake UP ** abort actframe iovar\n");
1267 /* if channel is not zero, "actfame" uses off channel scan.
1268 * So abort scan for off channel completion.
1269 */
1270 if (p2p->af_sent_channel)
1271 brcmf_notify_escan_complete(cfg, ifp, true, true);
1272 } else if (test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_AF_LISTEN,
1273 &p2p->status)) {
1274 brcmf_dbg(TRACE, "*** Wake UP ** abort listen for next af frame\n");
1275 /* So abort scan to cancel listen */
1276 brcmf_notify_escan_complete(cfg, ifp, true, true);
1277 }
1278 }
1279
1280
1281 /**
1282 * brcmf_p2p_gon_req_collision() - Check if go negotiaton collission
1283 *
1284 * @p2p: p2p device info struct.
1285 *
1286 * return true if recevied action frame is to be dropped.
1287 */
1288 static bool
1289 brcmf_p2p_gon_req_collision(struct brcmf_p2p_info *p2p, u8 *mac)
1290 {
1291 struct brcmf_cfg80211_info *cfg = p2p->cfg;
1292 struct brcmf_if *ifp;
1293
1294 brcmf_dbg(TRACE, "Enter\n");
1295
1296 if (!test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status) ||
1297 !p2p->gon_req_action)
1298 return false;
1299
1300 brcmf_dbg(TRACE, "GO Negotiation Request COLLISION !!!\n");
1301 /* if sa(peer) addr is less than da(my) addr, then this device
1302 * process peer's gon request and block to send gon req.
1303 * if not (sa addr > da addr),
1304 * this device will process gon request and drop gon req of peer.
1305 */
1306 ifp = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif->ifp;
1307 if (memcmp(mac, ifp->mac_addr, ETH_ALEN) < 0) {
1308 brcmf_dbg(INFO, "Block transmit gon req !!!\n");
1309 p2p->block_gon_req_tx = true;
1310 /* if we are finding a common channel for sending af,
1311 * do not scan more to block to send current gon req
1312 */
1313 if (test_and_clear_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL,
1314 &p2p->status))
1315 complete(&p2p->afx_hdl.act_frm_scan);
1316 if (test_and_clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME,
1317 &p2p->status))
1318 brcmf_p2p_stop_wait_next_action_frame(cfg);
1319 return false;
1320 }
1321
1322 /* drop gon request of peer to process gon request by this device. */
1323 brcmf_dbg(INFO, "Drop received gon req !!!\n");
1324
1325 return true;
1326 }
1327
1328
1329 /**
1330 * brcmf_p2p_notify_action_frame_rx() - received action frame.
1331 *
1332 * @ifp: interfac control.
1333 * @e: event message. Not used, to make it usable for fweh event dispatcher.
1334 * @data: payload of message, containing action frame data.
1335 *
1336 */
1337 int brcmf_p2p_notify_action_frame_rx(struct brcmf_if *ifp,
1338 const struct brcmf_event_msg *e,
1339 void *data)
1340 {
1341 struct brcmf_cfg80211_info *cfg = ifp->drvr->config;
1342 struct brcmf_p2p_info *p2p = &cfg->p2p;
1343 struct afx_hdl *afx_hdl = &p2p->afx_hdl;
1344 struct wireless_dev *wdev;
1345 u32 mgmt_frame_len = e->datalen - sizeof(struct brcmf_rx_mgmt_data);
1346 struct brcmf_rx_mgmt_data *rxframe = (struct brcmf_rx_mgmt_data *)data;
1347 u8 *frame = (u8 *)(rxframe + 1);
1348 struct brcmf_p2p_pub_act_frame *act_frm;
1349 struct brcmf_p2psd_gas_pub_act_frame *sd_act_frm;
1350 struct brcmu_chan ch;
1351 struct ieee80211_mgmt *mgmt_frame;
1352 s32 freq;
1353 u16 mgmt_type;
1354 u8 action;
1355
1356 if (e->datalen < sizeof(*rxframe)) {
1357 brcmf_dbg(SCAN, "Event data to small. Ignore\n");
1358 return 0;
1359 }
1360
1361 ch.chspec = be16_to_cpu(rxframe->chanspec);
1362 cfg->d11inf.decchspec(&ch);
1363 /* Check if wpa_supplicant has registered for this frame */
1364 brcmf_dbg(INFO, "ifp->vif->mgmt_rx_reg %04x\n", ifp->vif->mgmt_rx_reg);
1365 mgmt_type = (IEEE80211_STYPE_ACTION & IEEE80211_FCTL_STYPE) >> 4;
1366 if ((ifp->vif->mgmt_rx_reg & BIT(mgmt_type)) == 0)
1367 return 0;
1368
1369 brcmf_p2p_print_actframe(false, frame, mgmt_frame_len);
1370
1371 action = P2P_PAF_SUBTYPE_INVALID;
1372 if (brcmf_p2p_is_pub_action(frame, mgmt_frame_len)) {
1373 act_frm = (struct brcmf_p2p_pub_act_frame *)frame;
1374 action = act_frm->subtype;
1375 if ((action == P2P_PAF_GON_REQ) &&
1376 (brcmf_p2p_gon_req_collision(p2p, (u8 *)e->addr))) {
1377 if (test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL,
1378 &p2p->status) &&
1379 (ether_addr_equal(afx_hdl->tx_dst_addr, e->addr))) {
1380 afx_hdl->peer_chan = ch.control_ch_num;
1381 brcmf_dbg(INFO, "GON request: Peer found, channel=%d\n",
1382 afx_hdl->peer_chan);
1383 complete(&afx_hdl->act_frm_scan);
1384 }
1385 return 0;
1386 }
1387 /* After complete GO Negotiation, roll back to mpc mode */
1388 if ((action == P2P_PAF_GON_CONF) ||
1389 (action == P2P_PAF_PROVDIS_RSP))
1390 brcmf_set_mpc(ifp, 1);
1391 if (action == P2P_PAF_GON_CONF) {
1392 brcmf_dbg(TRACE, "P2P: GO_NEG_PHASE status cleared\n");
1393 clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status);
1394 }
1395 } else if (brcmf_p2p_is_gas_action(frame, mgmt_frame_len)) {
1396 sd_act_frm = (struct brcmf_p2psd_gas_pub_act_frame *)frame;
1397 action = sd_act_frm->action;
1398 }
1399
1400 if (test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status) &&
1401 (p2p->next_af_subtype == action)) {
1402 brcmf_dbg(TRACE, "We got a right next frame! (%d)\n", action);
1403 clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME,
1404 &p2p->status);
1405 /* Stop waiting for next AF. */
1406 brcmf_p2p_stop_wait_next_action_frame(cfg);
1407 }
1408
1409 mgmt_frame = kzalloc(offsetof(struct ieee80211_mgmt, u) +
1410 mgmt_frame_len, GFP_KERNEL);
1411 if (!mgmt_frame) {
1412 brcmf_err("No memory available for action frame\n");
1413 return -ENOMEM;
1414 }
1415 memcpy(mgmt_frame->da, ifp->mac_addr, ETH_ALEN);
1416 brcmf_fil_cmd_data_get(ifp, BRCMF_C_GET_BSSID, mgmt_frame->bssid,
1417 ETH_ALEN);
1418 memcpy(mgmt_frame->sa, e->addr, ETH_ALEN);
1419 mgmt_frame->frame_control = cpu_to_le16(IEEE80211_STYPE_ACTION);
1420 memcpy(&mgmt_frame->u, frame, mgmt_frame_len);
1421 mgmt_frame_len += offsetof(struct ieee80211_mgmt, u);
1422
1423 freq = ieee80211_channel_to_frequency(ch.control_ch_num,
1424 ch.band == BRCMU_CHAN_BAND_2G ?
1425 NL80211_BAND_2GHZ :
1426 NL80211_BAND_5GHZ);
1427
1428 wdev = &ifp->vif->wdev;
1429 cfg80211_rx_mgmt(wdev, freq, 0, (u8 *)mgmt_frame, mgmt_frame_len, 0);
1430
1431 kfree(mgmt_frame);
1432 return 0;
1433 }
1434
1435
1436 /**
1437 * brcmf_p2p_notify_action_tx_complete() - transmit action frame complete
1438 *
1439 * @ifp: interfac control.
1440 * @e: event message. Not used, to make it usable for fweh event dispatcher.
1441 * @data: not used.
1442 *
1443 */
1444 int brcmf_p2p_notify_action_tx_complete(struct brcmf_if *ifp,
1445 const struct brcmf_event_msg *e,
1446 void *data)
1447 {
1448 struct brcmf_cfg80211_info *cfg = ifp->drvr->config;
1449 struct brcmf_p2p_info *p2p = &cfg->p2p;
1450
1451 brcmf_dbg(INFO, "Enter: event %s, status=%d\n",
1452 e->event_code == BRCMF_E_ACTION_FRAME_OFF_CHAN_COMPLETE ?
1453 "ACTION_FRAME_OFF_CHAN_COMPLETE" : "ACTION_FRAME_COMPLETE",
1454 e->status);
1455
1456 if (!test_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status))
1457 return 0;
1458
1459 if (e->event_code == BRCMF_E_ACTION_FRAME_COMPLETE) {
1460 if (e->status == BRCMF_E_STATUS_SUCCESS) {
1461 set_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED,
1462 &p2p->status);
1463 if (!p2p->wait_for_offchan_complete)
1464 complete(&p2p->send_af_done);
1465 } else {
1466 set_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status);
1467 /* If there is no ack, we don't need to wait for
1468 * WLC_E_ACTION_FRAME_OFFCHAN_COMPLETE event
1469 */
1470 brcmf_p2p_stop_wait_next_action_frame(cfg);
1471 }
1472
1473 } else {
1474 complete(&p2p->send_af_done);
1475 }
1476 return 0;
1477 }
1478
1479
1480 /**
1481 * brcmf_p2p_tx_action_frame() - send action frame over fil.
1482 *
1483 * @p2p: p2p info struct for vif.
1484 * @af_params: action frame data/info.
1485 *
1486 * Send an action frame immediately without doing channel synchronization.
1487 *
1488 * This function waits for a completion event before returning.
1489 * The WLC_E_ACTION_FRAME_COMPLETE event will be received when the action
1490 * frame is transmitted.
1491 */
1492 static s32 brcmf_p2p_tx_action_frame(struct brcmf_p2p_info *p2p,
1493 struct brcmf_fil_af_params_le *af_params)
1494 {
1495 struct brcmf_cfg80211_vif *vif;
1496 s32 err = 0;
1497 s32 timeout = 0;
1498
1499 brcmf_dbg(TRACE, "Enter\n");
1500
1501 reinit_completion(&p2p->send_af_done);
1502 clear_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status);
1503 clear_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status);
1504
1505 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif;
1506 err = brcmf_fil_bsscfg_data_set(vif->ifp, "actframe", af_params,
1507 sizeof(*af_params));
1508 if (err) {
1509 brcmf_err(" sending action frame has failed\n");
1510 goto exit;
1511 }
1512
1513 p2p->af_sent_channel = le32_to_cpu(af_params->channel);
1514 p2p->af_tx_sent_jiffies = jiffies;
1515
1516 if (test_bit(BRCMF_P2P_STATUS_DISCOVER_LISTEN, &p2p->status) &&
1517 p2p->af_sent_channel ==
1518 ieee80211_frequency_to_channel(p2p->remain_on_channel.center_freq))
1519 p2p->wait_for_offchan_complete = false;
1520 else
1521 p2p->wait_for_offchan_complete = true;
1522
1523 brcmf_dbg(TRACE, "Waiting for %s tx completion event\n",
1524 (p2p->wait_for_offchan_complete) ?
1525 "off-channel" : "on-channel");
1526
1527 timeout = wait_for_completion_timeout(&p2p->send_af_done,
1528 P2P_AF_MAX_WAIT_TIME);
1529
1530 if (test_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status)) {
1531 brcmf_dbg(TRACE, "TX action frame operation is success\n");
1532 } else {
1533 err = -EIO;
1534 brcmf_dbg(TRACE, "TX action frame operation has failed\n");
1535 }
1536 /* clear status bit for action tx */
1537 clear_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status);
1538 clear_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status);
1539
1540 exit:
1541 return err;
1542 }
1543
1544
1545 /**
1546 * brcmf_p2p_pub_af_tx() - public action frame tx routine.
1547 *
1548 * @cfg: driver private data for cfg80211 interface.
1549 * @af_params: action frame data/info.
1550 * @config_af_params: configuration data for action frame.
1551 *
1552 * routine which transmits ation frame public type.
1553 */
1554 static s32 brcmf_p2p_pub_af_tx(struct brcmf_cfg80211_info *cfg,
1555 struct brcmf_fil_af_params_le *af_params,
1556 struct brcmf_config_af_params *config_af_params)
1557 {
1558 struct brcmf_p2p_info *p2p = &cfg->p2p;
1559 struct brcmf_fil_action_frame_le *action_frame;
1560 struct brcmf_p2p_pub_act_frame *act_frm;
1561 s32 err = 0;
1562 u16 ie_len;
1563
1564 action_frame = &af_params->action_frame;
1565 act_frm = (struct brcmf_p2p_pub_act_frame *)(action_frame->data);
1566
1567 config_af_params->extra_listen = true;
1568
1569 switch (act_frm->subtype) {
1570 case P2P_PAF_GON_REQ:
1571 brcmf_dbg(TRACE, "P2P: GO_NEG_PHASE status set\n");
1572 set_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status);
1573 config_af_params->mpc_onoff = 0;
1574 config_af_params->search_channel = true;
1575 p2p->next_af_subtype = act_frm->subtype + 1;
1576 p2p->gon_req_action = true;
1577 /* increase dwell time to wait for RESP frame */
1578 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME);
1579 break;
1580 case P2P_PAF_GON_RSP:
1581 p2p->next_af_subtype = act_frm->subtype + 1;
1582 /* increase dwell time to wait for CONF frame */
1583 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME);
1584 break;
1585 case P2P_PAF_GON_CONF:
1586 /* If we reached till GO Neg confirmation reset the filter */
1587 brcmf_dbg(TRACE, "P2P: GO_NEG_PHASE status cleared\n");
1588 clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status);
1589 /* turn on mpc again if go nego is done */
1590 config_af_params->mpc_onoff = 1;
1591 /* minimize dwell time */
1592 af_params->dwell_time = cpu_to_le32(P2P_AF_MIN_DWELL_TIME);
1593 config_af_params->extra_listen = false;
1594 break;
1595 case P2P_PAF_INVITE_REQ:
1596 config_af_params->search_channel = true;
1597 p2p->next_af_subtype = act_frm->subtype + 1;
1598 /* increase dwell time */
1599 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME);
1600 break;
1601 case P2P_PAF_INVITE_RSP:
1602 /* minimize dwell time */
1603 af_params->dwell_time = cpu_to_le32(P2P_AF_MIN_DWELL_TIME);
1604 config_af_params->extra_listen = false;
1605 break;
1606 case P2P_PAF_DEVDIS_REQ:
1607 config_af_params->search_channel = true;
1608 p2p->next_af_subtype = act_frm->subtype + 1;
1609 /* maximize dwell time to wait for RESP frame */
1610 af_params->dwell_time = cpu_to_le32(P2P_AF_LONG_DWELL_TIME);
1611 break;
1612 case P2P_PAF_DEVDIS_RSP:
1613 /* minimize dwell time */
1614 af_params->dwell_time = cpu_to_le32(P2P_AF_MIN_DWELL_TIME);
1615 config_af_params->extra_listen = false;
1616 break;
1617 case P2P_PAF_PROVDIS_REQ:
1618 ie_len = le16_to_cpu(action_frame->len) -
1619 offsetof(struct brcmf_p2p_pub_act_frame, elts);
1620 if (cfg80211_get_p2p_attr(&act_frm->elts[0], ie_len,
1621 IEEE80211_P2P_ATTR_GROUP_ID,
1622 NULL, 0) < 0)
1623 config_af_params->search_channel = true;
1624 config_af_params->mpc_onoff = 0;
1625 p2p->next_af_subtype = act_frm->subtype + 1;
1626 /* increase dwell time to wait for RESP frame */
1627 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME);
1628 break;
1629 case P2P_PAF_PROVDIS_RSP:
1630 /* wpa_supplicant send go nego req right after prov disc */
1631 p2p->next_af_subtype = P2P_PAF_GON_REQ;
1632 /* increase dwell time to MED level */
1633 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME);
1634 config_af_params->extra_listen = false;
1635 break;
1636 default:
1637 brcmf_err("Unknown p2p pub act frame subtype: %d\n",
1638 act_frm->subtype);
1639 err = -EINVAL;
1640 }
1641 return err;
1642 }
1643
1644 /**
1645 * brcmf_p2p_send_action_frame() - send action frame .
1646 *
1647 * @cfg: driver private data for cfg80211 interface.
1648 * @ndev: net device to transmit on.
1649 * @af_params: configuration data for action frame.
1650 */
1651 bool brcmf_p2p_send_action_frame(struct brcmf_cfg80211_info *cfg,
1652 struct net_device *ndev,
1653 struct brcmf_fil_af_params_le *af_params)
1654 {
1655 struct brcmf_p2p_info *p2p = &cfg->p2p;
1656 struct brcmf_if *ifp = netdev_priv(ndev);
1657 struct brcmf_fil_action_frame_le *action_frame;
1658 struct brcmf_config_af_params config_af_params;
1659 struct afx_hdl *afx_hdl = &p2p->afx_hdl;
1660 u16 action_frame_len;
1661 bool ack = false;
1662 u8 category;
1663 u8 action;
1664 s32 tx_retry;
1665 s32 extra_listen_time;
1666 uint delta_ms;
1667
1668 action_frame = &af_params->action_frame;
1669 action_frame_len = le16_to_cpu(action_frame->len);
1670
1671 brcmf_p2p_print_actframe(true, action_frame->data, action_frame_len);
1672
1673 /* Add the default dwell time. Dwell time to stay off-channel */
1674 /* to wait for a response action frame after transmitting an */
1675 /* GO Negotiation action frame */
1676 af_params->dwell_time = cpu_to_le32(P2P_AF_DWELL_TIME);
1677
1678 category = action_frame->data[DOT11_ACTION_CAT_OFF];
1679 action = action_frame->data[DOT11_ACTION_ACT_OFF];
1680
1681 /* initialize variables */
1682 p2p->next_af_subtype = P2P_PAF_SUBTYPE_INVALID;
1683 p2p->gon_req_action = false;
1684
1685 /* config parameters */
1686 config_af_params.mpc_onoff = -1;
1687 config_af_params.search_channel = false;
1688 config_af_params.extra_listen = false;
1689
1690 if (brcmf_p2p_is_pub_action(action_frame->data, action_frame_len)) {
1691 /* p2p public action frame process */
1692 if (brcmf_p2p_pub_af_tx(cfg, af_params, &config_af_params)) {
1693 /* Just send unknown subtype frame with */
1694 /* default parameters. */
1695 brcmf_err("P2P Public action frame, unknown subtype.\n");
1696 }
1697 } else if (brcmf_p2p_is_gas_action(action_frame->data,
1698 action_frame_len)) {
1699 /* service discovery process */
1700 if (action == P2PSD_ACTION_ID_GAS_IREQ ||
1701 action == P2PSD_ACTION_ID_GAS_CREQ) {
1702 /* configure service discovery query frame */
1703 config_af_params.search_channel = true;
1704
1705 /* save next af suptype to cancel */
1706 /* remaining dwell time */
1707 p2p->next_af_subtype = action + 1;
1708
1709 af_params->dwell_time =
1710 cpu_to_le32(P2P_AF_MED_DWELL_TIME);
1711 } else if (action == P2PSD_ACTION_ID_GAS_IRESP ||
1712 action == P2PSD_ACTION_ID_GAS_CRESP) {
1713 /* configure service discovery response frame */
1714 af_params->dwell_time =
1715 cpu_to_le32(P2P_AF_MIN_DWELL_TIME);
1716 } else {
1717 brcmf_err("Unknown action type: %d\n", action);
1718 goto exit;
1719 }
1720 } else if (brcmf_p2p_is_p2p_action(action_frame->data,
1721 action_frame_len)) {
1722 /* do not configure anything. it will be */
1723 /* sent with a default configuration */
1724 } else {
1725 brcmf_err("Unknown Frame: category 0x%x, action 0x%x\n",
1726 category, action);
1727 return false;
1728 }
1729
1730 /* if connecting on primary iface, sleep for a while before sending
1731 * af tx for VSDB
1732 */
1733 if (test_bit(BRCMF_VIF_STATUS_CONNECTING,
1734 &p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->sme_state))
1735 msleep(50);
1736
1737 /* if scan is ongoing, abort current scan. */
1738 if (test_bit(BRCMF_SCAN_STATUS_BUSY, &cfg->scan_status))
1739 brcmf_abort_scanning(cfg);
1740
1741 memcpy(afx_hdl->tx_dst_addr, action_frame->da, ETH_ALEN);
1742
1743 /* To make sure to send successfully action frame, turn off mpc */
1744 if (config_af_params.mpc_onoff == 0)
1745 brcmf_set_mpc(ifp, 0);
1746
1747 /* set status and destination address before sending af */
1748 if (p2p->next_af_subtype != P2P_PAF_SUBTYPE_INVALID) {
1749 /* set status to cancel the remained dwell time in rx process */
1750 set_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status);
1751 }
1752
1753 p2p->af_sent_channel = 0;
1754 set_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status);
1755 /* validate channel and p2p ies */
1756 if (config_af_params.search_channel &&
1757 IS_P2P_SOCIAL_CHANNEL(le32_to_cpu(af_params->channel)) &&
1758 p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif->saved_ie.probe_req_ie_len) {
1759 afx_hdl = &p2p->afx_hdl;
1760 afx_hdl->peer_listen_chan = le32_to_cpu(af_params->channel);
1761
1762 if (brcmf_p2p_af_searching_channel(p2p) ==
1763 P2P_INVALID_CHANNEL) {
1764 brcmf_err("Couldn't find peer's channel.\n");
1765 goto exit;
1766 }
1767
1768 /* Abort scan even for VSDB scenarios. Scan gets aborted in
1769 * firmware but after the check of piggyback algorithm. To take
1770 * care of current piggback algo, lets abort the scan here
1771 * itself.
1772 */
1773 brcmf_notify_escan_complete(cfg, ifp, true, true);
1774
1775 /* update channel */
1776 af_params->channel = cpu_to_le32(afx_hdl->peer_chan);
1777 }
1778
1779 tx_retry = 0;
1780 while (!p2p->block_gon_req_tx &&
1781 (ack == false) && (tx_retry < P2P_AF_TX_MAX_RETRY)) {
1782 ack = !brcmf_p2p_tx_action_frame(p2p, af_params);
1783 tx_retry++;
1784 }
1785 if (ack == false) {
1786 brcmf_err("Failed to send Action Frame(retry %d)\n", tx_retry);
1787 clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status);
1788 }
1789
1790 exit:
1791 clear_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status);
1792
1793 /* WAR: sometimes dongle does not keep the dwell time of 'actframe'.
1794 * if we coundn't get the next action response frame and dongle does
1795 * not keep the dwell time, go to listen state again to get next action
1796 * response frame.
1797 */
1798 if (ack && config_af_params.extra_listen && !p2p->block_gon_req_tx &&
1799 test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status) &&
1800 p2p->af_sent_channel == afx_hdl->my_listen_chan) {
1801 delta_ms = jiffies_to_msecs(jiffies - p2p->af_tx_sent_jiffies);
1802 if (le32_to_cpu(af_params->dwell_time) > delta_ms)
1803 extra_listen_time = le32_to_cpu(af_params->dwell_time) -
1804 delta_ms;
1805 else
1806 extra_listen_time = 0;
1807 if (extra_listen_time > 50) {
1808 set_bit(BRCMF_P2P_STATUS_WAITING_NEXT_AF_LISTEN,
1809 &p2p->status);
1810 brcmf_dbg(INFO, "Wait more time! actual af time:%d, calculated extra listen:%d\n",
1811 le32_to_cpu(af_params->dwell_time),
1812 extra_listen_time);
1813 extra_listen_time += 100;
1814 if (!brcmf_p2p_discover_listen(p2p,
1815 p2p->af_sent_channel,
1816 extra_listen_time)) {
1817 unsigned long duration;
1818
1819 extra_listen_time += 100;
1820 duration = msecs_to_jiffies(extra_listen_time);
1821 wait_for_completion_timeout(&p2p->wait_next_af,
1822 duration);
1823 }
1824 clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_AF_LISTEN,
1825 &p2p->status);
1826 }
1827 }
1828
1829 if (p2p->block_gon_req_tx) {
1830 /* if ack is true, supplicant will wait more time(100ms).
1831 * so we will return it as a success to get more time .
1832 */
1833 p2p->block_gon_req_tx = false;
1834 ack = true;
1835 }
1836
1837 clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status);
1838 /* if all done, turn mpc on again */
1839 if (config_af_params.mpc_onoff == 1)
1840 brcmf_set_mpc(ifp, 1);
1841
1842 return ack;
1843 }
1844
1845 /**
1846 * brcmf_p2p_notify_rx_mgmt_p2p_probereq() - Event handler for p2p probe req.
1847 *
1848 * @ifp: interface pointer for which event was received.
1849 * @e: even message.
1850 * @data: payload of event message (probe request).
1851 */
1852 s32 brcmf_p2p_notify_rx_mgmt_p2p_probereq(struct brcmf_if *ifp,
1853 const struct brcmf_event_msg *e,
1854 void *data)
1855 {
1856 struct brcmf_cfg80211_info *cfg = ifp->drvr->config;
1857 struct brcmf_p2p_info *p2p = &cfg->p2p;
1858 struct afx_hdl *afx_hdl = &p2p->afx_hdl;
1859 struct brcmf_cfg80211_vif *vif = ifp->vif;
1860 struct brcmf_rx_mgmt_data *rxframe = (struct brcmf_rx_mgmt_data *)data;
1861 struct brcmu_chan ch;
1862 u8 *mgmt_frame;
1863 u32 mgmt_frame_len;
1864 s32 freq;
1865 u16 mgmt_type;
1866
1867 brcmf_dbg(INFO, "Enter: event %d reason %d\n", e->event_code,
1868 e->reason);
1869
1870 if (e->datalen < sizeof(*rxframe)) {
1871 brcmf_dbg(SCAN, "Event data to small. Ignore\n");
1872 return 0;
1873 }
1874
1875 ch.chspec = be16_to_cpu(rxframe->chanspec);
1876 cfg->d11inf.decchspec(&ch);
1877
1878 if (test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status) &&
1879 (ether_addr_equal(afx_hdl->tx_dst_addr, e->addr))) {
1880 afx_hdl->peer_chan = ch.control_ch_num;
1881 brcmf_dbg(INFO, "PROBE REQUEST: Peer found, channel=%d\n",
1882 afx_hdl->peer_chan);
1883 complete(&afx_hdl->act_frm_scan);
1884 }
1885
1886 /* Firmware sends us two proberesponses for each idx one. At the */
1887 /* moment anything but bsscfgidx 0 is passed up to supplicant */
1888 if (e->bsscfgidx == 0)
1889 return 0;
1890
1891 /* Filter any P2P probe reqs arriving during the GO-NEG Phase */
1892 if (test_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status)) {
1893 brcmf_dbg(INFO, "Filtering P2P probe_req in GO-NEG phase\n");
1894 return 0;
1895 }
1896
1897 /* Check if wpa_supplicant has registered for this frame */
1898 brcmf_dbg(INFO, "vif->mgmt_rx_reg %04x\n", vif->mgmt_rx_reg);
1899 mgmt_type = (IEEE80211_STYPE_PROBE_REQ & IEEE80211_FCTL_STYPE) >> 4;
1900 if ((vif->mgmt_rx_reg & BIT(mgmt_type)) == 0)
1901 return 0;
1902
1903 mgmt_frame = (u8 *)(rxframe + 1);
1904 mgmt_frame_len = e->datalen - sizeof(*rxframe);
1905 freq = ieee80211_channel_to_frequency(ch.control_ch_num,
1906 ch.band == BRCMU_CHAN_BAND_2G ?
1907 NL80211_BAND_2GHZ :
1908 NL80211_BAND_5GHZ);
1909
1910 cfg80211_rx_mgmt(&vif->wdev, freq, 0, mgmt_frame, mgmt_frame_len, 0);
1911
1912 brcmf_dbg(INFO, "mgmt_frame_len (%d) , e->datalen (%d), chanspec (%04x), freq (%d)\n",
1913 mgmt_frame_len, e->datalen, ch.chspec, freq);
1914
1915 return 0;
1916 }
1917
1918
1919 /**
1920 * brcmf_p2p_get_current_chanspec() - Get current operation channel.
1921 *
1922 * @p2p: P2P specific data.
1923 * @chanspec: chanspec to be returned.
1924 */
1925 static void brcmf_p2p_get_current_chanspec(struct brcmf_p2p_info *p2p,
1926 u16 *chanspec)
1927 {
1928 struct brcmf_if *ifp;
1929 u8 mac_addr[ETH_ALEN];
1930 struct brcmu_chan ch;
1931 struct brcmf_bss_info_le *bi;
1932 u8 *buf;
1933
1934 ifp = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->ifp;
1935
1936 if (brcmf_fil_cmd_data_get(ifp, BRCMF_C_GET_BSSID, mac_addr,
1937 ETH_ALEN) == 0) {
1938 buf = kzalloc(WL_BSS_INFO_MAX, GFP_KERNEL);
1939 if (buf != NULL) {
1940 *(__le32 *)buf = cpu_to_le32(WL_BSS_INFO_MAX);
1941 if (brcmf_fil_cmd_data_get(ifp, BRCMF_C_GET_BSS_INFO,
1942 buf, WL_BSS_INFO_MAX) == 0) {
1943 bi = (struct brcmf_bss_info_le *)(buf + 4);
1944 *chanspec = le16_to_cpu(bi->chanspec);
1945 kfree(buf);
1946 return;
1947 }
1948 kfree(buf);
1949 }
1950 }
1951 /* Use default channel for P2P */
1952 ch.chnum = BRCMF_P2P_TEMP_CHAN;
1953 ch.bw = BRCMU_CHAN_BW_20;
1954 p2p->cfg->d11inf.encchspec(&ch);
1955 *chanspec = ch.chspec;
1956 }
1957
1958 /**
1959 * Change a P2P Role.
1960 * Parameters:
1961 * @mac: MAC address of the BSS to change a role
1962 * Returns 0 if success.
1963 */
1964 int brcmf_p2p_ifchange(struct brcmf_cfg80211_info *cfg,
1965 enum brcmf_fil_p2p_if_types if_type)
1966 {
1967 struct brcmf_p2p_info *p2p = &cfg->p2p;
1968 struct brcmf_cfg80211_vif *vif;
1969 struct brcmf_fil_p2p_if_le if_request;
1970 s32 err;
1971 u16 chanspec;
1972
1973 brcmf_dbg(TRACE, "Enter\n");
1974
1975 vif = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif;
1976 if (!vif) {
1977 brcmf_err("vif for P2PAPI_BSSCFG_PRIMARY does not exist\n");
1978 return -EPERM;
1979 }
1980 brcmf_notify_escan_complete(cfg, vif->ifp, true, true);
1981 vif = p2p->bss_idx[P2PAPI_BSSCFG_CONNECTION].vif;
1982 if (!vif) {
1983 brcmf_err("vif for P2PAPI_BSSCFG_CONNECTION does not exist\n");
1984 return -EPERM;
1985 }
1986 brcmf_set_mpc(vif->ifp, 0);
1987
1988 /* In concurrency case, STA may be already associated in a particular */
1989 /* channel. so retrieve the current channel of primary interface and */
1990 /* then start the virtual interface on that. */
1991 brcmf_p2p_get_current_chanspec(p2p, &chanspec);
1992
1993 if_request.type = cpu_to_le16((u16)if_type);
1994 if_request.chspec = cpu_to_le16(chanspec);
1995 memcpy(if_request.addr, p2p->int_addr, sizeof(if_request.addr));
1996
1997 brcmf_cfg80211_arm_vif_event(cfg, vif);
1998 err = brcmf_fil_iovar_data_set(vif->ifp, "p2p_ifupd", &if_request,
1999 sizeof(if_request));
2000 if (err) {
2001 brcmf_err("p2p_ifupd FAILED, err=%d\n", err);
2002 brcmf_cfg80211_arm_vif_event(cfg, NULL);
2003 return err;
2004 }
2005 err = brcmf_cfg80211_wait_vif_event(cfg, BRCMF_E_IF_CHANGE,
2006 BRCMF_VIF_EVENT_TIMEOUT);
2007 brcmf_cfg80211_arm_vif_event(cfg, NULL);
2008 if (!err) {
2009 brcmf_err("No BRCMF_E_IF_CHANGE event received\n");
2010 return -EIO;
2011 }
2012
2013 err = brcmf_fil_cmd_int_set(vif->ifp, BRCMF_C_SET_SCB_TIMEOUT,
2014 BRCMF_SCB_TIMEOUT_VALUE);
2015
2016 return err;
2017 }
2018
2019 static int brcmf_p2p_request_p2p_if(struct brcmf_p2p_info *p2p,
2020 struct brcmf_if *ifp, u8 ea[ETH_ALEN],
2021 enum brcmf_fil_p2p_if_types iftype)
2022 {
2023 struct brcmf_fil_p2p_if_le if_request;
2024 int err;
2025 u16 chanspec;
2026
2027 /* we need a default channel */
2028 brcmf_p2p_get_current_chanspec(p2p, &chanspec);
2029
2030 /* fill the firmware request */
2031 memcpy(if_request.addr, ea, ETH_ALEN);
2032 if_request.type = cpu_to_le16((u16)iftype);
2033 if_request.chspec = cpu_to_le16(chanspec);
2034
2035 err = brcmf_fil_iovar_data_set(ifp, "p2p_ifadd", &if_request,
2036 sizeof(if_request));
2037
2038 return err;
2039 }
2040
2041 static int brcmf_p2p_disable_p2p_if(struct brcmf_cfg80211_vif *vif)
2042 {
2043 struct brcmf_cfg80211_info *cfg = wdev_to_cfg(&vif->wdev);
2044 struct net_device *pri_ndev = cfg_to_ndev(cfg);
2045 struct brcmf_if *ifp = netdev_priv(pri_ndev);
2046 u8 *addr = vif->wdev.netdev->dev_addr;
2047
2048 return brcmf_fil_iovar_data_set(ifp, "p2p_ifdis", addr, ETH_ALEN);
2049 }
2050
2051 static int brcmf_p2p_release_p2p_if(struct brcmf_cfg80211_vif *vif)
2052 {
2053 struct brcmf_cfg80211_info *cfg = wdev_to_cfg(&vif->wdev);
2054 struct net_device *pri_ndev = cfg_to_ndev(cfg);
2055 struct brcmf_if *ifp = netdev_priv(pri_ndev);
2056 u8 *addr = vif->wdev.netdev->dev_addr;
2057
2058 return brcmf_fil_iovar_data_set(ifp, "p2p_ifdel", addr, ETH_ALEN);
2059 }
2060
2061 /**
2062 * brcmf_p2p_create_p2pdev() - create a P2P_DEVICE virtual interface.
2063 *
2064 * @p2p: P2P specific data.
2065 * @wiphy: wiphy device of new interface.
2066 * @addr: mac address for this new interface.
2067 */
2068 static struct wireless_dev *brcmf_p2p_create_p2pdev(struct brcmf_p2p_info *p2p,
2069 struct wiphy *wiphy,
2070 u8 *addr)
2071 {
2072 struct brcmf_cfg80211_vif *p2p_vif;
2073 struct brcmf_if *p2p_ifp;
2074 struct brcmf_if *pri_ifp;
2075 int err;
2076 u32 bsscfgidx;
2077
2078 if (p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif)
2079 return ERR_PTR(-ENOSPC);
2080
2081 p2p_vif = brcmf_alloc_vif(p2p->cfg, NL80211_IFTYPE_P2P_DEVICE);
2082 if (IS_ERR(p2p_vif)) {
2083 brcmf_err("could not create discovery vif\n");
2084 return (struct wireless_dev *)p2p_vif;
2085 }
2086
2087 pri_ifp = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->ifp;
2088
2089 /* firmware requires unique mac address for p2pdev interface */
2090 if (addr && ether_addr_equal(addr, pri_ifp->mac_addr)) {
2091 brcmf_err("discovery vif must be different from primary interface\n");
2092 return ERR_PTR(-EINVAL);
2093 }
2094
2095 brcmf_p2p_generate_bss_mac(p2p, addr);
2096 brcmf_p2p_set_firmware(pri_ifp, p2p->dev_addr);
2097
2098 brcmf_cfg80211_arm_vif_event(p2p->cfg, p2p_vif);
2099 brcmf_fweh_p2pdev_setup(pri_ifp, true);
2100
2101 /* Initialize P2P Discovery in the firmware */
2102 err = brcmf_fil_iovar_int_set(pri_ifp, "p2p_disc", 1);
2103 if (err < 0) {
2104 brcmf_err("set p2p_disc error\n");
2105 brcmf_fweh_p2pdev_setup(pri_ifp, false);
2106 brcmf_cfg80211_arm_vif_event(p2p->cfg, NULL);
2107 goto fail;
2108 }
2109
2110 /* wait for firmware event */
2111 err = brcmf_cfg80211_wait_vif_event(p2p->cfg, BRCMF_E_IF_ADD,
2112 BRCMF_VIF_EVENT_TIMEOUT);
2113 brcmf_cfg80211_arm_vif_event(p2p->cfg, NULL);
2114 brcmf_fweh_p2pdev_setup(pri_ifp, false);
2115 if (!err) {
2116 brcmf_err("timeout occurred\n");
2117 err = -EIO;
2118 goto fail;
2119 }
2120
2121 /* discovery interface created */
2122 p2p_ifp = p2p_vif->ifp;
2123 p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif = p2p_vif;
2124 memcpy(p2p_ifp->mac_addr, p2p->dev_addr, ETH_ALEN);
2125 memcpy(&p2p_vif->wdev.address, p2p->dev_addr, sizeof(p2p->dev_addr));
2126
2127 /* verify bsscfg index for P2P discovery */
2128 err = brcmf_fil_iovar_int_get(pri_ifp, "p2p_dev", &bsscfgidx);
2129 if (err < 0) {
2130 brcmf_err("retrieving discover bsscfg index failed\n");
2131 goto fail;
2132 }
2133
2134 WARN_ON(p2p_ifp->bsscfgidx != bsscfgidx);
2135
2136 init_completion(&p2p->send_af_done);
2137 INIT_WORK(&p2p->afx_hdl.afx_work, brcmf_p2p_afx_handler);
2138 init_completion(&p2p->afx_hdl.act_frm_scan);
2139 init_completion(&p2p->wait_next_af);
2140
2141 return &p2p_vif->wdev;
2142
2143 fail:
2144 brcmf_free_vif(p2p_vif);
2145 return ERR_PTR(err);
2146 }
2147
2148 /**
2149 * brcmf_p2p_add_vif() - create a new P2P virtual interface.
2150 *
2151 * @wiphy: wiphy device of new interface.
2152 * @name: name of the new interface.
2153 * @name_assign_type: origin of the interface name
2154 * @type: nl80211 interface type.
2155 * @params: contains mac address for P2P device.
2156 */
2157 struct wireless_dev *brcmf_p2p_add_vif(struct wiphy *wiphy, const char *name,
2158 unsigned char name_assign_type,
2159 enum nl80211_iftype type,
2160 struct vif_params *params)
2161 {
2162 struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
2163 struct brcmf_if *ifp = netdev_priv(cfg_to_ndev(cfg));
2164 struct brcmf_cfg80211_vif *vif;
2165 enum brcmf_fil_p2p_if_types iftype;
2166 int err;
2167
2168 if (brcmf_cfg80211_vif_event_armed(cfg))
2169 return ERR_PTR(-EBUSY);
2170
2171 brcmf_dbg(INFO, "adding vif \"%s\" (type=%d)\n", name, type);
2172
2173 switch (type) {
2174 case NL80211_IFTYPE_P2P_CLIENT:
2175 iftype = BRCMF_FIL_P2P_IF_CLIENT;
2176 break;
2177 case NL80211_IFTYPE_P2P_GO:
2178 iftype = BRCMF_FIL_P2P_IF_GO;
2179 break;
2180 case NL80211_IFTYPE_P2P_DEVICE:
2181 return brcmf_p2p_create_p2pdev(&cfg->p2p, wiphy,
2182 params->macaddr);
2183 default:
2184 return ERR_PTR(-EOPNOTSUPP);
2185 }
2186
2187 vif = brcmf_alloc_vif(cfg, type);
2188 if (IS_ERR(vif))
2189 return (struct wireless_dev *)vif;
2190 brcmf_cfg80211_arm_vif_event(cfg, vif);
2191
2192 err = brcmf_p2p_request_p2p_if(&cfg->p2p, ifp, cfg->p2p.int_addr,
2193 iftype);
2194 if (err) {
2195 brcmf_cfg80211_arm_vif_event(cfg, NULL);
2196 goto fail;
2197 }
2198
2199 /* wait for firmware event */
2200 err = brcmf_cfg80211_wait_vif_event(cfg, BRCMF_E_IF_ADD,
2201 BRCMF_VIF_EVENT_TIMEOUT);
2202 brcmf_cfg80211_arm_vif_event(cfg, NULL);
2203 if (!err) {
2204 brcmf_err("timeout occurred\n");
2205 err = -EIO;
2206 goto fail;
2207 }
2208
2209 /* interface created in firmware */
2210 ifp = vif->ifp;
2211 if (!ifp) {
2212 brcmf_err("no if pointer provided\n");
2213 err = -ENOENT;
2214 goto fail;
2215 }
2216
2217 strncpy(ifp->ndev->name, name, sizeof(ifp->ndev->name) - 1);
2218 ifp->ndev->name_assign_type = name_assign_type;
2219 err = brcmf_net_attach(ifp, true);
2220 if (err) {
2221 brcmf_err("Registering netdevice failed\n");
2222 free_netdev(ifp->ndev);
2223 goto fail;
2224 }
2225
2226 cfg->p2p.bss_idx[P2PAPI_BSSCFG_CONNECTION].vif = vif;
2227 /* Disable firmware roaming for P2P interface */
2228 brcmf_fil_iovar_int_set(ifp, "roam_off", 1);
2229 if (iftype == BRCMF_FIL_P2P_IF_GO) {
2230 /* set station timeout for p2p */
2231 brcmf_fil_cmd_int_set(ifp, BRCMF_C_SET_SCB_TIMEOUT,
2232 BRCMF_SCB_TIMEOUT_VALUE);
2233 }
2234 return &ifp->vif->wdev;
2235
2236 fail:
2237 brcmf_free_vif(vif);
2238 return ERR_PTR(err);
2239 }
2240
2241 /**
2242 * brcmf_p2p_del_vif() - delete a P2P virtual interface.
2243 *
2244 * @wiphy: wiphy device of interface.
2245 * @wdev: wireless device of interface.
2246 */
2247 int brcmf_p2p_del_vif(struct wiphy *wiphy, struct wireless_dev *wdev)
2248 {
2249 struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
2250 struct brcmf_p2p_info *p2p = &cfg->p2p;
2251 struct brcmf_cfg80211_vif *vif;
2252 enum nl80211_iftype iftype;
2253 bool wait_for_disable = false;
2254 int err;
2255
2256 brcmf_dbg(TRACE, "delete P2P vif\n");
2257 vif = container_of(wdev, struct brcmf_cfg80211_vif, wdev);
2258
2259 iftype = vif->wdev.iftype;
2260 brcmf_cfg80211_arm_vif_event(cfg, vif);
2261 switch (iftype) {
2262 case NL80211_IFTYPE_P2P_CLIENT:
2263 if (test_bit(BRCMF_VIF_STATUS_DISCONNECTING, &vif->sme_state))
2264 wait_for_disable = true;
2265 break;
2266
2267 case NL80211_IFTYPE_P2P_GO:
2268 if (!brcmf_p2p_disable_p2p_if(vif))
2269 wait_for_disable = true;
2270 break;
2271
2272 case NL80211_IFTYPE_P2P_DEVICE:
2273 if (!p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif)
2274 return 0;
2275 brcmf_p2p_cancel_remain_on_channel(vif->ifp);
2276 brcmf_p2p_deinit_discovery(p2p);
2277 break;
2278
2279 default:
2280 return -ENOTSUPP;
2281 }
2282
2283 clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status);
2284 brcmf_dbg(INFO, "P2P: GO_NEG_PHASE status cleared\n");
2285
2286 if (wait_for_disable)
2287 wait_for_completion_timeout(&cfg->vif_disabled,
2288 BRCMF_P2P_DISABLE_TIMEOUT);
2289
2290 err = 0;
2291 if (iftype != NL80211_IFTYPE_P2P_DEVICE) {
2292 brcmf_vif_clear_mgmt_ies(vif);
2293 err = brcmf_p2p_release_p2p_if(vif);
2294 }
2295 if (!err) {
2296 /* wait for firmware event */
2297 err = brcmf_cfg80211_wait_vif_event(cfg, BRCMF_E_IF_DEL,
2298 BRCMF_VIF_EVENT_TIMEOUT);
2299 if (!err)
2300 err = -EIO;
2301 else
2302 err = 0;
2303 }
2304 brcmf_remove_interface(vif->ifp, true);
2305
2306 brcmf_cfg80211_arm_vif_event(cfg, NULL);
2307 if (iftype != NL80211_IFTYPE_P2P_DEVICE)
2308 p2p->bss_idx[P2PAPI_BSSCFG_CONNECTION].vif = NULL;
2309
2310 return err;
2311 }
2312
2313 void brcmf_p2p_ifp_removed(struct brcmf_if *ifp, bool rtnl_locked)
2314 {
2315 struct brcmf_cfg80211_info *cfg;
2316 struct brcmf_cfg80211_vif *vif;
2317
2318 brcmf_dbg(INFO, "P2P: device interface removed\n");
2319 vif = ifp->vif;
2320 cfg = wdev_to_cfg(&vif->wdev);
2321 cfg->p2p.bss_idx[P2PAPI_BSSCFG_DEVICE].vif = NULL;
2322 if (!rtnl_locked)
2323 rtnl_lock();
2324 cfg80211_unregister_wdev(&vif->wdev);
2325 if (!rtnl_locked)
2326 rtnl_unlock();
2327 brcmf_free_vif(vif);
2328 }
2329
2330 int brcmf_p2p_start_device(struct wiphy *wiphy, struct wireless_dev *wdev)
2331 {
2332 struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
2333 struct brcmf_p2p_info *p2p = &cfg->p2p;
2334 struct brcmf_cfg80211_vif *vif;
2335 int err;
2336
2337 vif = container_of(wdev, struct brcmf_cfg80211_vif, wdev);
2338 mutex_lock(&cfg->usr_sync);
2339 err = brcmf_p2p_enable_discovery(p2p);
2340 if (!err)
2341 set_bit(BRCMF_VIF_STATUS_READY, &vif->sme_state);
2342 mutex_unlock(&cfg->usr_sync);
2343 return err;
2344 }
2345
2346 void brcmf_p2p_stop_device(struct wiphy *wiphy, struct wireless_dev *wdev)
2347 {
2348 struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
2349 struct brcmf_p2p_info *p2p = &cfg->p2p;
2350 struct brcmf_cfg80211_vif *vif;
2351
2352 vif = container_of(wdev, struct brcmf_cfg80211_vif, wdev);
2353 /* This call can be result of the unregister_wdev call. In that case
2354 * we dont want to do anything anymore. Just return. The config vif
2355 * will have been cleared at this point.
2356 */
2357 if (p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif == vif) {
2358 mutex_lock(&cfg->usr_sync);
2359 /* Set the discovery state to SCAN */
2360 (void)brcmf_p2p_set_discover_state(vif->ifp,
2361 WL_P2P_DISC_ST_SCAN, 0, 0);
2362 brcmf_abort_scanning(cfg);
2363 clear_bit(BRCMF_VIF_STATUS_READY, &vif->sme_state);
2364 mutex_unlock(&cfg->usr_sync);
2365 }
2366 }
2367
2368 /**
2369 * brcmf_p2p_attach() - attach for P2P.
2370 *
2371 * @cfg: driver private data for cfg80211 interface.
2372 * @p2pdev_forced: create p2p device interface at attach.
2373 */
2374 s32 brcmf_p2p_attach(struct brcmf_cfg80211_info *cfg, bool p2pdev_forced)
2375 {
2376 struct brcmf_p2p_info *p2p;
2377 struct brcmf_if *pri_ifp;
2378 s32 err = 0;
2379 void *err_ptr;
2380
2381 p2p = &cfg->p2p;
2382 p2p->cfg = cfg;
2383
2384 pri_ifp = brcmf_get_ifp(cfg->pub, 0);
2385 p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif = pri_ifp->vif;
2386
2387 if (p2pdev_forced) {
2388 err_ptr = brcmf_p2p_create_p2pdev(p2p, NULL, NULL);
2389 if (IS_ERR(err_ptr)) {
2390 brcmf_err("P2P device creation failed.\n");
2391 err = PTR_ERR(err_ptr);
2392 }
2393 } else {
2394 p2p->p2pdev_dynamically = true;
2395 }
2396 return err;
2397 }
2398
2399 /**
2400 * brcmf_p2p_detach() - detach P2P.
2401 *
2402 * @p2p: P2P specific data.
2403 */
2404 void brcmf_p2p_detach(struct brcmf_p2p_info *p2p)
2405 {
2406 struct brcmf_cfg80211_vif *vif;
2407
2408 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif;
2409 if (vif != NULL) {
2410 brcmf_p2p_cancel_remain_on_channel(vif->ifp);
2411 brcmf_p2p_deinit_discovery(p2p);
2412 brcmf_remove_interface(vif->ifp, false);
2413 }
2414 /* just set it all to zero */
2415 memset(p2p, 0, sizeof(*p2p));
2416 }
2417
Linux with added FPC-III support