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 2000
75 #define P2P_INVALID_CHANNEL -1
76 #define P2P_CHANNEL_SYNC_RETRY 5
77 #define P2P_AF_FRM_SCAN_MAX_WAIT 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 /**
106 * struct brcmf_p2p_disc_st_le - set discovery state in firmware.
107 *
108 * @state: requested discovery state (see enum brcmf_p2p_disc_state).
109 * @chspec: channel parameter for %WL_P2P_DISC_ST_LISTEN state.
110 * @dwell: dwell time in ms for %WL_P2P_DISC_ST_LISTEN state.
111 */
112 struct brcmf_p2p_disc_st_le {
113 u8 state;
114 __le16 chspec;
115 __le16 dwell;
116 };
117
118 /**
119 * enum brcmf_p2p_disc_state - P2P discovery state values
120 *
121 * @WL_P2P_DISC_ST_SCAN: P2P discovery with wildcard SSID and P2P IE.
122 * @WL_P2P_DISC_ST_LISTEN: P2P discovery off-channel for specified time.
123 * @WL_P2P_DISC_ST_SEARCH: P2P discovery with P2P wildcard SSID and P2P IE.
124 */
125 enum brcmf_p2p_disc_state {
126 WL_P2P_DISC_ST_SCAN,
127 WL_P2P_DISC_ST_LISTEN,
128 WL_P2P_DISC_ST_SEARCH
129 };
130
131 /**
132 * struct brcmf_p2p_scan_le - P2P specific scan request.
133 *
134 * @type: type of scan method requested (values: 'E' or 'S').
135 * @reserved: reserved (ignored).
136 * @eparams: parameters used for type 'E'.
137 * @sparams: parameters used for type 'S'.
138 */
139 struct brcmf_p2p_scan_le {
140 u8 type;
141 u8 reserved[3];
142 union {
143 struct brcmf_escan_params_le eparams;
144 struct brcmf_scan_params_le sparams;
145 };
146 };
147
148 /**
149 * struct brcmf_p2p_pub_act_frame - WiFi P2P Public Action Frame
150 *
151 * @category: P2P_PUB_AF_CATEGORY
152 * @action: P2P_PUB_AF_ACTION
153 * @oui[3]: P2P_OUI
154 * @oui_type: OUI type - P2P_VER
155 * @subtype: OUI subtype - P2P_TYPE_*
156 * @dialog_token: nonzero, identifies req/rsp transaction
157 * @elts[1]: Variable length information elements.
158 */
159 struct brcmf_p2p_pub_act_frame {
160 u8 category;
161 u8 action;
162 u8 oui[3];
163 u8 oui_type;
164 u8 subtype;
165 u8 dialog_token;
166 u8 elts[1];
167 };
168
169 /**
170 * struct brcmf_p2p_action_frame - WiFi P2P Action Frame
171 *
172 * @category: P2P_AF_CATEGORY
173 * @OUI[3]: OUI - P2P_OUI
174 * @type: OUI Type - P2P_VER
175 * @subtype: OUI Subtype - P2P_AF_*
176 * @dialog_token: nonzero, identifies req/resp tranaction
177 * @elts[1]: Variable length information elements.
178 */
179 struct brcmf_p2p_action_frame {
180 u8 category;
181 u8 oui[3];
182 u8 type;
183 u8 subtype;
184 u8 dialog_token;
185 u8 elts[1];
186 };
187
188 /**
189 * struct brcmf_p2psd_gas_pub_act_frame - Wi-Fi GAS Public Action Frame
190 *
191 * @category: 0x04 Public Action Frame
192 * @action: 0x6c Advertisement Protocol
193 * @dialog_token: nonzero, identifies req/rsp transaction
194 * @query_data[1]: Query Data. SD gas ireq SD gas iresp
195 */
196 struct brcmf_p2psd_gas_pub_act_frame {
197 u8 category;
198 u8 action;
199 u8 dialog_token;
200 u8 query_data[1];
201 };
202
203 /**
204 * struct brcmf_config_af_params - Action Frame Parameters for tx.
205 *
206 * @mpc_onoff: To make sure to send successfully action frame, we have to
207 * turn off mpc 0: off, 1: on, (-1): do nothing
208 * @search_channel: 1: search peer's channel to send af
209 * extra_listen: keep the dwell time to get af response frame.
210 */
211 struct brcmf_config_af_params {
212 s32 mpc_onoff;
213 bool search_channel;
214 bool extra_listen;
215 };
216
217 /**
218 * brcmf_p2p_is_pub_action() - true if p2p public type frame.
219 *
220 * @frame: action frame data.
221 * @frame_len: length of action frame data.
222 *
223 * Determine if action frame is p2p public action type
224 */
brcmf_p2p_is_pub_action(void * frame,u32 frame_len)225 static bool brcmf_p2p_is_pub_action(void *frame, u32 frame_len)
226 {
227 struct brcmf_p2p_pub_act_frame *pact_frm;
228
229 if (frame == NULL)
230 return false;
231
232 pact_frm = (struct brcmf_p2p_pub_act_frame *)frame;
233 if (frame_len < sizeof(struct brcmf_p2p_pub_act_frame) - 1)
234 return false;
235
236 if (pact_frm->category == P2P_PUB_AF_CATEGORY &&
237 pact_frm->action == P2P_PUB_AF_ACTION &&
238 pact_frm->oui_type == P2P_VER &&
239 memcmp(pact_frm->oui, P2P_OUI, P2P_OUI_LEN) == 0)
240 return true;
241
242 return false;
243 }
244
245 /**
246 * brcmf_p2p_is_p2p_action() - true if p2p action type frame.
247 *
248 * @frame: action frame data.
249 * @frame_len: length of action frame data.
250 *
251 * Determine if action frame is p2p action type
252 */
brcmf_p2p_is_p2p_action(void * frame,u32 frame_len)253 static bool brcmf_p2p_is_p2p_action(void *frame, u32 frame_len)
254 {
255 struct brcmf_p2p_action_frame *act_frm;
256
257 if (frame == NULL)
258 return false;
259
260 act_frm = (struct brcmf_p2p_action_frame *)frame;
261 if (frame_len < sizeof(struct brcmf_p2p_action_frame) - 1)
262 return false;
263
264 if (act_frm->category == P2P_AF_CATEGORY &&
265 act_frm->type == P2P_VER &&
266 memcmp(act_frm->oui, P2P_OUI, P2P_OUI_LEN) == 0)
267 return true;
268
269 return false;
270 }
271
272 /**
273 * brcmf_p2p_is_gas_action() - true if p2p gas action type frame.
274 *
275 * @frame: action frame data.
276 * @frame_len: length of action frame data.
277 *
278 * Determine if action frame is p2p gas action type
279 */
brcmf_p2p_is_gas_action(void * frame,u32 frame_len)280 static bool brcmf_p2p_is_gas_action(void *frame, u32 frame_len)
281 {
282 struct brcmf_p2psd_gas_pub_act_frame *sd_act_frm;
283
284 if (frame == NULL)
285 return false;
286
287 sd_act_frm = (struct brcmf_p2psd_gas_pub_act_frame *)frame;
288 if (frame_len < sizeof(struct brcmf_p2psd_gas_pub_act_frame) - 1)
289 return false;
290
291 if (sd_act_frm->category != P2PSD_ACTION_CATEGORY)
292 return false;
293
294 if (sd_act_frm->action == P2PSD_ACTION_ID_GAS_IREQ ||
295 sd_act_frm->action == P2PSD_ACTION_ID_GAS_IRESP ||
296 sd_act_frm->action == P2PSD_ACTION_ID_GAS_CREQ ||
297 sd_act_frm->action == P2PSD_ACTION_ID_GAS_CRESP)
298 return true;
299
300 return false;
301 }
302
303 /**
304 * brcmf_p2p_print_actframe() - debug print routine.
305 *
306 * @tx: Received or to be transmitted
307 * @frame: action frame data.
308 * @frame_len: length of action frame data.
309 *
310 * Print information about the p2p action frame
311 */
312
313 #ifdef DEBUG
314
brcmf_p2p_print_actframe(bool tx,void * frame,u32 frame_len)315 static void brcmf_p2p_print_actframe(bool tx, void *frame, u32 frame_len)
316 {
317 struct brcmf_p2p_pub_act_frame *pact_frm;
318 struct brcmf_p2p_action_frame *act_frm;
319 struct brcmf_p2psd_gas_pub_act_frame *sd_act_frm;
320
321 if (!frame || frame_len <= 2)
322 return;
323
324 if (brcmf_p2p_is_pub_action(frame, frame_len)) {
325 pact_frm = (struct brcmf_p2p_pub_act_frame *)frame;
326 switch (pact_frm->subtype) {
327 case P2P_PAF_GON_REQ:
328 brcmf_dbg(TRACE, "%s P2P Group Owner Negotiation Req Frame\n",
329 (tx) ? "TX" : "RX");
330 break;
331 case P2P_PAF_GON_RSP:
332 brcmf_dbg(TRACE, "%s P2P Group Owner Negotiation Rsp Frame\n",
333 (tx) ? "TX" : "RX");
334 break;
335 case P2P_PAF_GON_CONF:
336 brcmf_dbg(TRACE, "%s P2P Group Owner Negotiation Confirm Frame\n",
337 (tx) ? "TX" : "RX");
338 break;
339 case P2P_PAF_INVITE_REQ:
340 brcmf_dbg(TRACE, "%s P2P Invitation Request Frame\n",
341 (tx) ? "TX" : "RX");
342 break;
343 case P2P_PAF_INVITE_RSP:
344 brcmf_dbg(TRACE, "%s P2P Invitation Response Frame\n",
345 (tx) ? "TX" : "RX");
346 break;
347 case P2P_PAF_DEVDIS_REQ:
348 brcmf_dbg(TRACE, "%s P2P Device Discoverability Request Frame\n",
349 (tx) ? "TX" : "RX");
350 break;
351 case P2P_PAF_DEVDIS_RSP:
352 brcmf_dbg(TRACE, "%s P2P Device Discoverability Response Frame\n",
353 (tx) ? "TX" : "RX");
354 break;
355 case P2P_PAF_PROVDIS_REQ:
356 brcmf_dbg(TRACE, "%s P2P Provision Discovery Request Frame\n",
357 (tx) ? "TX" : "RX");
358 break;
359 case P2P_PAF_PROVDIS_RSP:
360 brcmf_dbg(TRACE, "%s P2P Provision Discovery Response Frame\n",
361 (tx) ? "TX" : "RX");
362 break;
363 default:
364 brcmf_dbg(TRACE, "%s Unknown P2P Public Action Frame\n",
365 (tx) ? "TX" : "RX");
366 break;
367 }
368 } else if (brcmf_p2p_is_p2p_action(frame, frame_len)) {
369 act_frm = (struct brcmf_p2p_action_frame *)frame;
370 switch (act_frm->subtype) {
371 case P2P_AF_NOTICE_OF_ABSENCE:
372 brcmf_dbg(TRACE, "%s P2P Notice of Absence Frame\n",
373 (tx) ? "TX" : "RX");
374 break;
375 case P2P_AF_PRESENCE_REQ:
376 brcmf_dbg(TRACE, "%s P2P Presence Request Frame\n",
377 (tx) ? "TX" : "RX");
378 break;
379 case P2P_AF_PRESENCE_RSP:
380 brcmf_dbg(TRACE, "%s P2P Presence Response Frame\n",
381 (tx) ? "TX" : "RX");
382 break;
383 case P2P_AF_GO_DISC_REQ:
384 brcmf_dbg(TRACE, "%s P2P Discoverability Request Frame\n",
385 (tx) ? "TX" : "RX");
386 break;
387 default:
388 brcmf_dbg(TRACE, "%s Unknown P2P Action Frame\n",
389 (tx) ? "TX" : "RX");
390 }
391
392 } else if (brcmf_p2p_is_gas_action(frame, frame_len)) {
393 sd_act_frm = (struct brcmf_p2psd_gas_pub_act_frame *)frame;
394 switch (sd_act_frm->action) {
395 case P2PSD_ACTION_ID_GAS_IREQ:
396 brcmf_dbg(TRACE, "%s P2P GAS Initial Request\n",
397 (tx) ? "TX" : "RX");
398 break;
399 case P2PSD_ACTION_ID_GAS_IRESP:
400 brcmf_dbg(TRACE, "%s P2P GAS Initial Response\n",
401 (tx) ? "TX" : "RX");
402 break;
403 case P2PSD_ACTION_ID_GAS_CREQ:
404 brcmf_dbg(TRACE, "%s P2P GAS Comback Request\n",
405 (tx) ? "TX" : "RX");
406 break;
407 case P2PSD_ACTION_ID_GAS_CRESP:
408 brcmf_dbg(TRACE, "%s P2P GAS Comback Response\n",
409 (tx) ? "TX" : "RX");
410 break;
411 default:
412 brcmf_dbg(TRACE, "%s Unknown P2P GAS Frame\n",
413 (tx) ? "TX" : "RX");
414 break;
415 }
416 }
417 }
418
419 #else
420
brcmf_p2p_print_actframe(bool tx,void * frame,u32 frame_len)421 static void brcmf_p2p_print_actframe(bool tx, void *frame, u32 frame_len)
422 {
423 }
424
425 #endif
426
427
428 /**
429 * brcmf_p2p_set_firmware() - prepare firmware for peer-to-peer operation.
430 *
431 * @ifp: ifp to use for iovars (primary).
432 * @p2p_mac: mac address to configure for p2p_da_override
433 */
brcmf_p2p_set_firmware(struct brcmf_if * ifp,u8 * p2p_mac)434 static int brcmf_p2p_set_firmware(struct brcmf_if *ifp, u8 *p2p_mac)
435 {
436 s32 ret = 0;
437
438 brcmf_fil_cmd_int_set(ifp, BRCMF_C_DOWN, 1);
439 brcmf_fil_iovar_int_set(ifp, "apsta", 1);
440 brcmf_fil_cmd_int_set(ifp, BRCMF_C_UP, 1);
441
442 /* In case of COB type, firmware has default mac address
443 * After Initializing firmware, we have to set current mac address to
444 * firmware for P2P device address. This must be done with discovery
445 * disabled.
446 */
447 brcmf_fil_iovar_int_set(ifp, "p2p_disc", 0);
448
449 ret = brcmf_fil_iovar_data_set(ifp, "p2p_da_override", p2p_mac,
450 ETH_ALEN);
451 if (ret)
452 brcmf_err("failed to update device address ret %d\n", ret);
453
454 return ret;
455 }
456
457 /**
458 * brcmf_p2p_generate_bss_mac() - derive mac addresses for P2P.
459 *
460 * @p2p: P2P specific data.
461 * @dev_addr: optional device address.
462 *
463 * P2P needs mac addresses for P2P device and interface. If no device
464 * address it specified, these are derived from a random ethernet
465 * address.
466 */
brcmf_p2p_generate_bss_mac(struct brcmf_p2p_info * p2p,u8 * dev_addr)467 static void brcmf_p2p_generate_bss_mac(struct brcmf_p2p_info *p2p, u8 *dev_addr)
468 {
469 bool random_addr = false;
470
471 if (!dev_addr || is_zero_ether_addr(dev_addr))
472 random_addr = true;
473
474 /* Generate the P2P Device Address obtaining a random ethernet
475 * address with the locally administered bit set.
476 */
477 if (random_addr)
478 eth_random_addr(p2p->dev_addr);
479 else
480 memcpy(p2p->dev_addr, dev_addr, ETH_ALEN);
481
482 /* Generate the P2P Interface Address. If the discovery and connection
483 * BSSCFGs need to simultaneously co-exist, then this address must be
484 * different from the P2P Device Address, but also locally administered.
485 */
486 memcpy(p2p->int_addr, p2p->dev_addr, ETH_ALEN);
487 p2p->int_addr[0] |= 0x02;
488 p2p->int_addr[4] ^= 0x80;
489 }
490
491 /**
492 * brcmf_p2p_scan_is_p2p_request() - is cfg80211 scan request a P2P scan.
493 *
494 * @request: the scan request as received from cfg80211.
495 *
496 * returns true if one of the ssids in the request matches the
497 * P2P wildcard ssid; otherwise returns false.
498 */
brcmf_p2p_scan_is_p2p_request(struct cfg80211_scan_request * request)499 static bool brcmf_p2p_scan_is_p2p_request(struct cfg80211_scan_request *request)
500 {
501 struct cfg80211_ssid *ssids = request->ssids;
502 int i;
503
504 for (i = 0; i < request->n_ssids; i++) {
505 if (ssids[i].ssid_len != BRCMF_P2P_WILDCARD_SSID_LEN)
506 continue;
507
508 brcmf_dbg(INFO, "comparing ssid \"%s\"", ssids[i].ssid);
509 if (!memcmp(BRCMF_P2P_WILDCARD_SSID, ssids[i].ssid,
510 BRCMF_P2P_WILDCARD_SSID_LEN))
511 return true;
512 }
513 return false;
514 }
515
516 /**
517 * brcmf_p2p_set_discover_state - set discover state in firmware.
518 *
519 * @ifp: low-level interface object.
520 * @state: discover state to set.
521 * @chanspec: channel parameters (for state @WL_P2P_DISC_ST_LISTEN only).
522 * @listen_ms: duration to listen (for state @WL_P2P_DISC_ST_LISTEN only).
523 */
brcmf_p2p_set_discover_state(struct brcmf_if * ifp,u8 state,u16 chanspec,u16 listen_ms)524 static s32 brcmf_p2p_set_discover_state(struct brcmf_if *ifp, u8 state,
525 u16 chanspec, u16 listen_ms)
526 {
527 struct brcmf_p2p_disc_st_le discover_state;
528 s32 ret = 0;
529 brcmf_dbg(TRACE, "enter\n");
530
531 discover_state.state = state;
532 discover_state.chspec = cpu_to_le16(chanspec);
533 discover_state.dwell = cpu_to_le16(listen_ms);
534 ret = brcmf_fil_bsscfg_data_set(ifp, "p2p_state", &discover_state,
535 sizeof(discover_state));
536 return ret;
537 }
538
539 /**
540 * brcmf_p2p_deinit_discovery() - disable P2P device discovery.
541 *
542 * @p2p: P2P specific data.
543 *
544 * Resets the discovery state and disables it in firmware.
545 */
brcmf_p2p_deinit_discovery(struct brcmf_p2p_info * p2p)546 static s32 brcmf_p2p_deinit_discovery(struct brcmf_p2p_info *p2p)
547 {
548 struct brcmf_cfg80211_vif *vif;
549
550 brcmf_dbg(TRACE, "enter\n");
551
552 /* Set the discovery state to SCAN */
553 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif;
554 (void)brcmf_p2p_set_discover_state(vif->ifp, WL_P2P_DISC_ST_SCAN, 0, 0);
555
556 /* Disable P2P discovery in the firmware */
557 vif = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif;
558 (void)brcmf_fil_iovar_int_set(vif->ifp, "p2p_disc", 0);
559
560 return 0;
561 }
562
563 /**
564 * brcmf_p2p_enable_discovery() - initialize and configure discovery.
565 *
566 * @p2p: P2P specific data.
567 *
568 * Initializes the discovery device and configure the virtual interface.
569 */
brcmf_p2p_enable_discovery(struct brcmf_p2p_info * p2p)570 static int brcmf_p2p_enable_discovery(struct brcmf_p2p_info *p2p)
571 {
572 struct brcmf_cfg80211_vif *vif;
573 s32 ret = 0;
574
575 brcmf_dbg(TRACE, "enter\n");
576 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif;
577 if (!vif) {
578 brcmf_err("P2P config device not available\n");
579 ret = -EPERM;
580 goto exit;
581 }
582
583 if (test_bit(BRCMF_P2P_STATUS_ENABLED, &p2p->status)) {
584 brcmf_dbg(INFO, "P2P config device already configured\n");
585 goto exit;
586 }
587
588 /* Re-initialize P2P Discovery in the firmware */
589 vif = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif;
590 ret = brcmf_fil_iovar_int_set(vif->ifp, "p2p_disc", 1);
591 if (ret < 0) {
592 brcmf_err("set p2p_disc error\n");
593 goto exit;
594 }
595 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif;
596 ret = brcmf_p2p_set_discover_state(vif->ifp, WL_P2P_DISC_ST_SCAN, 0, 0);
597 if (ret < 0) {
598 brcmf_err("unable to set WL_P2P_DISC_ST_SCAN\n");
599 goto exit;
600 }
601
602 /*
603 * Set wsec to any non-zero value in the discovery bsscfg
604 * to ensure our P2P probe responses have the privacy bit
605 * set in the 802.11 WPA IE. Some peer devices may not
606 * initiate WPS with us if this bit is not set.
607 */
608 ret = brcmf_fil_bsscfg_int_set(vif->ifp, "wsec", AES_ENABLED);
609 if (ret < 0) {
610 brcmf_err("wsec error %d\n", ret);
611 goto exit;
612 }
613
614 set_bit(BRCMF_P2P_STATUS_ENABLED, &p2p->status);
615 exit:
616 return ret;
617 }
618
619 /**
620 * brcmf_p2p_escan() - initiate a P2P scan.
621 *
622 * @p2p: P2P specific data.
623 * @num_chans: number of channels to scan.
624 * @chanspecs: channel parameters for @num_chans channels.
625 * @search_state: P2P discover state to use.
626 * @action: scan action to pass to firmware.
627 * @bss_type: type of P2P bss.
628 */
brcmf_p2p_escan(struct brcmf_p2p_info * p2p,u32 num_chans,u16 chanspecs[],s32 search_state,u16 action,enum p2p_bss_type bss_type)629 static s32 brcmf_p2p_escan(struct brcmf_p2p_info *p2p, u32 num_chans,
630 u16 chanspecs[], s32 search_state, u16 action,
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 struct brcmf_ssid ssid;
644
645 memsize += num_chans * sizeof(__le16);
646 memblk = kzalloc(memsize, GFP_KERNEL);
647 if (!memblk)
648 return -ENOMEM;
649
650 vif = p2p->bss_idx[bss_type].vif;
651 if (vif == NULL) {
652 brcmf_err("no vif for bss type %d\n", bss_type);
653 ret = -EINVAL;
654 goto exit;
655 }
656
657 switch (search_state) {
658 case WL_P2P_DISC_ST_SEARCH:
659 /*
660 * If we in SEARCH STATE, we don't need to set SSID explictly
661 * because dongle use P2P WILDCARD internally by default
662 */
663 /* use null ssid */
664 ssid.SSID_len = 0;
665 memset(ssid.SSID, 0, sizeof(ssid.SSID));
666 break;
667 case WL_P2P_DISC_ST_SCAN:
668 /*
669 * wpa_supplicant has p2p_find command with type social or
670 * progressive. For progressive, we need to set the ssid to
671 * P2P WILDCARD because we just do broadcast scan unless
672 * setting SSID.
673 */
674 ssid.SSID_len = BRCMF_P2P_WILDCARD_SSID_LEN;
675 memcpy(ssid.SSID, BRCMF_P2P_WILDCARD_SSID, ssid.SSID_len);
676 break;
677 default:
678 brcmf_err(" invalid search state %d\n", search_state);
679 ret = -EINVAL;
680 goto exit;
681 }
682
683 brcmf_p2p_set_discover_state(vif->ifp, search_state, 0, 0);
684
685 /*
686 * set p2p scan parameters.
687 */
688 p2p_params = (struct brcmf_p2p_scan_le *)memblk;
689 p2p_params->type = 'E';
690
691 /* determine the scan engine parameters */
692 sparams = &p2p_params->eparams.params_le;
693 sparams->bss_type = DOT11_BSSTYPE_ANY;
694 if (p2p->cfg->active_scan)
695 sparams->scan_type = 0;
696 else
697 sparams->scan_type = 1;
698
699 eth_broadcast_addr(sparams->bssid);
700 if (ssid.SSID_len)
701 memcpy(sparams->ssid_le.SSID, ssid.SSID, ssid.SSID_len);
702 sparams->ssid_le.SSID_len = cpu_to_le32(ssid.SSID_len);
703 sparams->home_time = cpu_to_le32(P2PAPI_SCAN_HOME_TIME_MS);
704
705 /*
706 * SOCIAL_CHAN_CNT + 1 takes care of the Progressive scan
707 * supported by the supplicant.
708 */
709 if (num_chans == SOCIAL_CHAN_CNT || num_chans == (SOCIAL_CHAN_CNT + 1))
710 active = P2PAPI_SCAN_SOCIAL_DWELL_TIME_MS;
711 else if (num_chans == AF_PEER_SEARCH_CNT)
712 active = P2PAPI_SCAN_AF_SEARCH_DWELL_TIME_MS;
713 else if (brcmf_get_vif_state_any(p2p->cfg, BRCMF_VIF_STATUS_CONNECTED))
714 active = -1;
715 else
716 active = P2PAPI_SCAN_DWELL_TIME_MS;
717
718 /* Override scan params to find a peer for a connection */
719 if (num_chans == 1) {
720 active = WL_SCAN_CONNECT_DWELL_TIME_MS;
721 /* WAR to sync with presence period of VSDB GO.
722 * send probe request more frequently
723 */
724 nprobes = active / WL_SCAN_JOIN_PROBE_INTERVAL_MS;
725 } else {
726 nprobes = active / P2PAPI_SCAN_NPROBS_TIME_MS;
727 }
728
729 if (nprobes <= 0)
730 nprobes = 1;
731
732 brcmf_dbg(INFO, "nprobes # %d, active_time %d\n", nprobes, active);
733 sparams->active_time = cpu_to_le32(active);
734 sparams->nprobes = cpu_to_le32(nprobes);
735 sparams->passive_time = cpu_to_le32(-1);
736 sparams->channel_num = cpu_to_le32(num_chans &
737 BRCMF_SCAN_PARAMS_COUNT_MASK);
738 for (i = 0; i < num_chans; i++)
739 sparams->channel_list[i] = cpu_to_le16(chanspecs[i]);
740
741 /* set the escan specific parameters */
742 p2p_params->eparams.version = cpu_to_le32(BRCMF_ESCAN_REQ_VERSION);
743 p2p_params->eparams.action = cpu_to_le16(action);
744 p2p_params->eparams.sync_id = cpu_to_le16(0x1234);
745 /* perform p2p scan on primary device */
746 ret = brcmf_fil_bsscfg_data_set(vif->ifp, "p2p_scan", memblk, memsize);
747 if (!ret)
748 set_bit(BRCMF_SCAN_STATUS_BUSY, &p2p->cfg->scan_status);
749 exit:
750 kfree(memblk);
751 return ret;
752 }
753
754 /**
755 * brcmf_p2p_run_escan() - escan callback for peer-to-peer.
756 *
757 * @cfg: driver private data for cfg80211 interface.
758 * @ndev: net device for which scan is requested.
759 * @request: scan request from cfg80211.
760 * @action: scan action.
761 *
762 * Determines the P2P discovery state based to scan request parameters and
763 * validates the channels in the request.
764 */
brcmf_p2p_run_escan(struct brcmf_cfg80211_info * cfg,struct brcmf_if * ifp,struct cfg80211_scan_request * request,u16 action)765 static s32 brcmf_p2p_run_escan(struct brcmf_cfg80211_info *cfg,
766 struct brcmf_if *ifp,
767 struct cfg80211_scan_request *request,
768 u16 action)
769 {
770 struct brcmf_p2p_info *p2p = &cfg->p2p;
771 s32 err = 0;
772 s32 search_state = WL_P2P_DISC_ST_SCAN;
773 struct brcmf_cfg80211_vif *vif;
774 struct net_device *dev = NULL;
775 int i, num_nodfs = 0;
776 u16 *chanspecs;
777
778 brcmf_dbg(TRACE, "enter\n");
779
780 if (!request) {
781 err = -EINVAL;
782 goto exit;
783 }
784
785 if (request->n_channels) {
786 chanspecs = kcalloc(request->n_channels, sizeof(*chanspecs),
787 GFP_KERNEL);
788 if (!chanspecs) {
789 err = -ENOMEM;
790 goto exit;
791 }
792 vif = p2p->bss_idx[P2PAPI_BSSCFG_CONNECTION].vif;
793 if (vif)
794 dev = vif->wdev.netdev;
795 if (request->n_channels == 3 &&
796 request->channels[0]->hw_value == SOCIAL_CHAN_1 &&
797 request->channels[1]->hw_value == SOCIAL_CHAN_2 &&
798 request->channels[2]->hw_value == SOCIAL_CHAN_3) {
799 /* SOCIAL CHANNELS 1, 6, 11 */
800 search_state = WL_P2P_DISC_ST_SEARCH;
801 brcmf_dbg(INFO, "P2P SEARCH PHASE START\n");
802 } else if (dev != NULL &&
803 vif->wdev.iftype == NL80211_IFTYPE_P2P_GO) {
804 /* If you are already a GO, then do SEARCH only */
805 brcmf_dbg(INFO, "Already a GO. Do SEARCH Only\n");
806 search_state = WL_P2P_DISC_ST_SEARCH;
807 } else {
808 brcmf_dbg(INFO, "P2P SCAN STATE START\n");
809 }
810
811 /*
812 * no P2P scanning on passive or DFS channels.
813 */
814 for (i = 0; i < request->n_channels; i++) {
815 struct ieee80211_channel *chan = request->channels[i];
816
817 if (chan->flags & (IEEE80211_CHAN_RADAR |
818 IEEE80211_CHAN_NO_IR))
819 continue;
820
821 chanspecs[i] = channel_to_chanspec(&p2p->cfg->d11inf,
822 chan);
823 brcmf_dbg(INFO, "%d: chan=%d, channel spec=%x\n",
824 num_nodfs, chan->hw_value, chanspecs[i]);
825 num_nodfs++;
826 }
827 err = brcmf_p2p_escan(p2p, num_nodfs, chanspecs, search_state,
828 action, P2PAPI_BSSCFG_DEVICE);
829 kfree(chanspecs);
830 }
831 exit:
832 if (err)
833 brcmf_err("error (%d)\n", err);
834 return err;
835 }
836
837
838 /**
839 * brcmf_p2p_find_listen_channel() - find listen channel in ie string.
840 *
841 * @ie: string of information elements.
842 * @ie_len: length of string.
843 *
844 * Scan ie for p2p ie and look for attribute 6 channel. If available determine
845 * channel and return it.
846 */
brcmf_p2p_find_listen_channel(const u8 * ie,u32 ie_len)847 static s32 brcmf_p2p_find_listen_channel(const u8 *ie, u32 ie_len)
848 {
849 u8 channel_ie[5];
850 s32 listen_channel;
851 s32 err;
852
853 err = cfg80211_get_p2p_attr(ie, ie_len,
854 IEEE80211_P2P_ATTR_LISTEN_CHANNEL,
855 channel_ie, sizeof(channel_ie));
856 if (err < 0)
857 return err;
858
859 /* listen channel subel length format: */
860 /* 3(country) + 1(op. class) + 1(chan num) */
861 listen_channel = (s32)channel_ie[3 + 1];
862
863 if (listen_channel == SOCIAL_CHAN_1 ||
864 listen_channel == SOCIAL_CHAN_2 ||
865 listen_channel == SOCIAL_CHAN_3) {
866 brcmf_dbg(INFO, "Found my Listen Channel %d\n", listen_channel);
867 return listen_channel;
868 }
869
870 return -EPERM;
871 }
872
873
874 /**
875 * brcmf_p2p_scan_prep() - prepare scan based on request.
876 *
877 * @wiphy: wiphy device.
878 * @request: scan request from cfg80211.
879 * @vif: vif on which scan request is to be executed.
880 *
881 * Prepare the scan appropriately for type of scan requested. Overrides the
882 * escan .run() callback for peer-to-peer scanning.
883 */
brcmf_p2p_scan_prep(struct wiphy * wiphy,struct cfg80211_scan_request * request,struct brcmf_cfg80211_vif * vif)884 int brcmf_p2p_scan_prep(struct wiphy *wiphy,
885 struct cfg80211_scan_request *request,
886 struct brcmf_cfg80211_vif *vif)
887 {
888 struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
889 struct brcmf_p2p_info *p2p = &cfg->p2p;
890 int err = 0;
891
892 if (brcmf_p2p_scan_is_p2p_request(request)) {
893 /* find my listen channel */
894 err = brcmf_p2p_find_listen_channel(request->ie,
895 request->ie_len);
896 if (err < 0)
897 return err;
898
899 p2p->afx_hdl.my_listen_chan = err;
900
901 clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status);
902 brcmf_dbg(INFO, "P2P: GO_NEG_PHASE status cleared\n");
903
904 err = brcmf_p2p_enable_discovery(p2p);
905 if (err)
906 return err;
907
908 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif;
909
910 /* override .run_escan() callback. */
911 cfg->escan_info.run = brcmf_p2p_run_escan;
912 }
913 err = brcmf_vif_set_mgmt_ie(vif, BRCMF_VNDR_IE_PRBREQ_FLAG,
914 request->ie, request->ie_len);
915 return err;
916 }
917
918
919 /**
920 * brcmf_p2p_discover_listen() - set firmware to discover listen state.
921 *
922 * @p2p: p2p device.
923 * @channel: channel nr for discover listen.
924 * @duration: time in ms to stay on channel.
925 *
926 */
927 static s32
brcmf_p2p_discover_listen(struct brcmf_p2p_info * p2p,u16 channel,u32 duration)928 brcmf_p2p_discover_listen(struct brcmf_p2p_info *p2p, u16 channel, u32 duration)
929 {
930 struct brcmf_cfg80211_vif *vif;
931 struct brcmu_chan ch;
932 s32 err = 0;
933
934 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif;
935 if (!vif) {
936 brcmf_err("Discovery is not set, so we have nothing to do\n");
937 err = -EPERM;
938 goto exit;
939 }
940
941 if (test_bit(BRCMF_P2P_STATUS_DISCOVER_LISTEN, &p2p->status)) {
942 brcmf_err("Previous LISTEN is not completed yet\n");
943 /* WAR: prevent cookie mismatch in wpa_supplicant return OK */
944 goto exit;
945 }
946
947 ch.chnum = channel;
948 ch.bw = BRCMU_CHAN_BW_20;
949 p2p->cfg->d11inf.encchspec(&ch);
950 err = brcmf_p2p_set_discover_state(vif->ifp, WL_P2P_DISC_ST_LISTEN,
951 ch.chspec, (u16)duration);
952 if (!err) {
953 set_bit(BRCMF_P2P_STATUS_DISCOVER_LISTEN, &p2p->status);
954 p2p->remain_on_channel_cookie++;
955 }
956 exit:
957 return err;
958 }
959
960
961 /**
962 * brcmf_p2p_remain_on_channel() - put device on channel and stay there.
963 *
964 * @wiphy: wiphy device.
965 * @channel: channel to stay on.
966 * @duration: time in ms to remain on channel.
967 *
968 */
brcmf_p2p_remain_on_channel(struct wiphy * wiphy,struct wireless_dev * wdev,struct ieee80211_channel * channel,unsigned int duration,u64 * cookie)969 int brcmf_p2p_remain_on_channel(struct wiphy *wiphy, struct wireless_dev *wdev,
970 struct ieee80211_channel *channel,
971 unsigned int duration, u64 *cookie)
972 {
973 struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
974 struct brcmf_p2p_info *p2p = &cfg->p2p;
975 s32 err;
976 u16 channel_nr;
977
978 channel_nr = ieee80211_frequency_to_channel(channel->center_freq);
979 brcmf_dbg(TRACE, "Enter, channel: %d, duration ms (%d)\n", channel_nr,
980 duration);
981
982 err = brcmf_p2p_enable_discovery(p2p);
983 if (err)
984 goto exit;
985 err = brcmf_p2p_discover_listen(p2p, channel_nr, duration);
986 if (err)
987 goto exit;
988
989 memcpy(&p2p->remain_on_channel, channel, sizeof(*channel));
990 *cookie = p2p->remain_on_channel_cookie;
991 cfg80211_ready_on_channel(wdev, *cookie, channel, duration, GFP_KERNEL);
992
993 exit:
994 return err;
995 }
996
997
998 /**
999 * brcmf_p2p_notify_listen_complete() - p2p listen has completed.
1000 *
1001 * @ifp: interfac control.
1002 * @e: event message. Not used, to make it usable for fweh event dispatcher.
1003 * @data: payload of message. Not used.
1004 *
1005 */
brcmf_p2p_notify_listen_complete(struct brcmf_if * ifp,const struct brcmf_event_msg * e,void * data)1006 int brcmf_p2p_notify_listen_complete(struct brcmf_if *ifp,
1007 const struct brcmf_event_msg *e,
1008 void *data)
1009 {
1010 struct brcmf_cfg80211_info *cfg = ifp->drvr->config;
1011 struct brcmf_p2p_info *p2p = &cfg->p2p;
1012
1013 brcmf_dbg(TRACE, "Enter\n");
1014 if (test_and_clear_bit(BRCMF_P2P_STATUS_DISCOVER_LISTEN,
1015 &p2p->status)) {
1016 if (test_and_clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_AF_LISTEN,
1017 &p2p->status)) {
1018 clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME,
1019 &p2p->status);
1020 brcmf_dbg(INFO, "Listen DONE, wake up wait_next_af\n");
1021 complete(&p2p->wait_next_af);
1022 }
1023
1024 cfg80211_remain_on_channel_expired(&ifp->vif->wdev,
1025 p2p->remain_on_channel_cookie,
1026 &p2p->remain_on_channel,
1027 GFP_KERNEL);
1028 }
1029 return 0;
1030 }
1031
1032
1033 /**
1034 * brcmf_p2p_cancel_remain_on_channel() - cancel p2p listen state.
1035 *
1036 * @ifp: interfac control.
1037 *
1038 */
brcmf_p2p_cancel_remain_on_channel(struct brcmf_if * ifp)1039 void brcmf_p2p_cancel_remain_on_channel(struct brcmf_if *ifp)
1040 {
1041 if (!ifp)
1042 return;
1043 brcmf_p2p_set_discover_state(ifp, WL_P2P_DISC_ST_SCAN, 0, 0);
1044 brcmf_p2p_notify_listen_complete(ifp, NULL, NULL);
1045 }
1046
1047
1048 /**
1049 * brcmf_p2p_act_frm_search() - search function for action frame.
1050 *
1051 * @p2p: p2p device.
1052 * channel: channel on which action frame is to be trasmitted.
1053 *
1054 * search function to reach at common channel to send action frame. When
1055 * channel is 0 then all social channels will be used to send af
1056 */
brcmf_p2p_act_frm_search(struct brcmf_p2p_info * p2p,u16 channel)1057 static s32 brcmf_p2p_act_frm_search(struct brcmf_p2p_info *p2p, u16 channel)
1058 {
1059 s32 err;
1060 u32 channel_cnt;
1061 u16 *default_chan_list;
1062 u32 i;
1063 struct brcmu_chan ch;
1064
1065 brcmf_dbg(TRACE, "Enter\n");
1066
1067 if (channel)
1068 channel_cnt = AF_PEER_SEARCH_CNT;
1069 else
1070 channel_cnt = SOCIAL_CHAN_CNT;
1071 default_chan_list = kzalloc(channel_cnt * sizeof(*default_chan_list),
1072 GFP_KERNEL);
1073 if (default_chan_list == NULL) {
1074 brcmf_err("channel list allocation failed\n");
1075 err = -ENOMEM;
1076 goto exit;
1077 }
1078 ch.bw = BRCMU_CHAN_BW_20;
1079 if (channel) {
1080 ch.chnum = channel;
1081 p2p->cfg->d11inf.encchspec(&ch);
1082 /* insert same channel to the chan_list */
1083 for (i = 0; i < channel_cnt; i++)
1084 default_chan_list[i] = ch.chspec;
1085 } else {
1086 ch.chnum = SOCIAL_CHAN_1;
1087 p2p->cfg->d11inf.encchspec(&ch);
1088 default_chan_list[0] = ch.chspec;
1089 ch.chnum = SOCIAL_CHAN_2;
1090 p2p->cfg->d11inf.encchspec(&ch);
1091 default_chan_list[1] = ch.chspec;
1092 ch.chnum = SOCIAL_CHAN_3;
1093 p2p->cfg->d11inf.encchspec(&ch);
1094 default_chan_list[2] = ch.chspec;
1095 }
1096 err = brcmf_p2p_escan(p2p, channel_cnt, default_chan_list,
1097 WL_P2P_DISC_ST_SEARCH, WL_ESCAN_ACTION_START,
1098 P2PAPI_BSSCFG_DEVICE);
1099 kfree(default_chan_list);
1100 exit:
1101 return err;
1102 }
1103
1104
1105 /**
1106 * brcmf_p2p_afx_handler() - afx worker thread.
1107 *
1108 * @work:
1109 *
1110 */
brcmf_p2p_afx_handler(struct work_struct * work)1111 static void brcmf_p2p_afx_handler(struct work_struct *work)
1112 {
1113 struct afx_hdl *afx_hdl = container_of(work, struct afx_hdl, afx_work);
1114 struct brcmf_p2p_info *p2p = container_of(afx_hdl,
1115 struct brcmf_p2p_info,
1116 afx_hdl);
1117 s32 err;
1118
1119 if (!afx_hdl->is_active)
1120 return;
1121
1122 if (afx_hdl->is_listen && afx_hdl->my_listen_chan)
1123 /* 100ms ~ 300ms */
1124 err = brcmf_p2p_discover_listen(p2p, afx_hdl->my_listen_chan,
1125 100 * (1 + prandom_u32() % 3));
1126 else
1127 err = brcmf_p2p_act_frm_search(p2p, afx_hdl->peer_listen_chan);
1128
1129 if (err) {
1130 brcmf_err("ERROR occurred! value is (%d)\n", err);
1131 if (test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL,
1132 &p2p->status))
1133 complete(&afx_hdl->act_frm_scan);
1134 }
1135 }
1136
1137
1138 /**
1139 * brcmf_p2p_af_searching_channel() - search channel.
1140 *
1141 * @p2p: p2p device info struct.
1142 *
1143 */
brcmf_p2p_af_searching_channel(struct brcmf_p2p_info * p2p)1144 static s32 brcmf_p2p_af_searching_channel(struct brcmf_p2p_info *p2p)
1145 {
1146 struct afx_hdl *afx_hdl = &p2p->afx_hdl;
1147 struct brcmf_cfg80211_vif *pri_vif;
1148 unsigned long duration;
1149 s32 retry;
1150
1151 brcmf_dbg(TRACE, "Enter\n");
1152
1153 pri_vif = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif;
1154
1155 reinit_completion(&afx_hdl->act_frm_scan);
1156 set_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status);
1157 afx_hdl->is_active = true;
1158 afx_hdl->peer_chan = P2P_INVALID_CHANNEL;
1159
1160 /* Loop to wait until we find a peer's channel or the
1161 * pending action frame tx is cancelled.
1162 */
1163 retry = 0;
1164 duration = msecs_to_jiffies(P2P_AF_FRM_SCAN_MAX_WAIT);
1165 while ((retry < P2P_CHANNEL_SYNC_RETRY) &&
1166 (afx_hdl->peer_chan == P2P_INVALID_CHANNEL)) {
1167 afx_hdl->is_listen = false;
1168 brcmf_dbg(TRACE, "Scheduling action frame for sending.. (%d)\n",
1169 retry);
1170 /* search peer on peer's listen channel */
1171 schedule_work(&afx_hdl->afx_work);
1172 wait_for_completion_timeout(&afx_hdl->act_frm_scan, duration);
1173 if ((afx_hdl->peer_chan != P2P_INVALID_CHANNEL) ||
1174 (!test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL,
1175 &p2p->status)))
1176 break;
1177
1178 if (afx_hdl->my_listen_chan) {
1179 brcmf_dbg(TRACE, "Scheduling listen peer, channel=%d\n",
1180 afx_hdl->my_listen_chan);
1181 /* listen on my listen channel */
1182 afx_hdl->is_listen = true;
1183 schedule_work(&afx_hdl->afx_work);
1184 wait_for_completion_timeout(&afx_hdl->act_frm_scan,
1185 duration);
1186 }
1187 if ((afx_hdl->peer_chan != P2P_INVALID_CHANNEL) ||
1188 (!test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL,
1189 &p2p->status)))
1190 break;
1191 retry++;
1192
1193 /* if sta is connected or connecting, sleep for a while before
1194 * retry af tx or finding a peer
1195 */
1196 if (test_bit(BRCMF_VIF_STATUS_CONNECTED, &pri_vif->sme_state) ||
1197 test_bit(BRCMF_VIF_STATUS_CONNECTING, &pri_vif->sme_state))
1198 msleep(P2P_DEFAULT_SLEEP_TIME_VSDB);
1199 }
1200
1201 brcmf_dbg(TRACE, "Completed search/listen peer_chan=%d\n",
1202 afx_hdl->peer_chan);
1203 afx_hdl->is_active = false;
1204
1205 clear_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status);
1206
1207 return afx_hdl->peer_chan;
1208 }
1209
1210
1211 /**
1212 * brcmf_p2p_scan_finding_common_channel() - was escan used for finding channel
1213 *
1214 * @cfg: common configuration struct.
1215 * @bi: bss info struct, result from scan.
1216 *
1217 */
brcmf_p2p_scan_finding_common_channel(struct brcmf_cfg80211_info * cfg,struct brcmf_bss_info_le * bi)1218 bool brcmf_p2p_scan_finding_common_channel(struct brcmf_cfg80211_info *cfg,
1219 struct brcmf_bss_info_le *bi)
1220
1221 {
1222 struct brcmf_p2p_info *p2p = &cfg->p2p;
1223 struct afx_hdl *afx_hdl = &p2p->afx_hdl;
1224 struct brcmu_chan ch;
1225 u8 *ie;
1226 s32 err;
1227 u8 p2p_dev_addr[ETH_ALEN];
1228
1229 if (!test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status))
1230 return false;
1231
1232 if (bi == NULL) {
1233 brcmf_dbg(TRACE, "ACTION FRAME SCAN Done\n");
1234 if (afx_hdl->peer_chan == P2P_INVALID_CHANNEL)
1235 complete(&afx_hdl->act_frm_scan);
1236 return true;
1237 }
1238
1239 ie = ((u8 *)bi) + le16_to_cpu(bi->ie_offset);
1240 memset(p2p_dev_addr, 0, sizeof(p2p_dev_addr));
1241 err = cfg80211_get_p2p_attr(ie, le32_to_cpu(bi->ie_length),
1242 IEEE80211_P2P_ATTR_DEVICE_INFO,
1243 p2p_dev_addr, sizeof(p2p_dev_addr));
1244 if (err < 0)
1245 err = cfg80211_get_p2p_attr(ie, le32_to_cpu(bi->ie_length),
1246 IEEE80211_P2P_ATTR_DEVICE_ID,
1247 p2p_dev_addr, sizeof(p2p_dev_addr));
1248 if ((err >= 0) &&
1249 (ether_addr_equal(p2p_dev_addr, afx_hdl->tx_dst_addr))) {
1250 if (!bi->ctl_ch) {
1251 ch.chspec = le16_to_cpu(bi->chanspec);
1252 cfg->d11inf.decchspec(&ch);
1253 bi->ctl_ch = ch.chnum;
1254 }
1255 afx_hdl->peer_chan = bi->ctl_ch;
1256 brcmf_dbg(TRACE, "ACTION FRAME SCAN : Peer %pM found, channel : %d\n",
1257 afx_hdl->tx_dst_addr, afx_hdl->peer_chan);
1258 complete(&afx_hdl->act_frm_scan);
1259 }
1260 return true;
1261 }
1262
1263 /**
1264 * brcmf_p2p_stop_wait_next_action_frame() - finish scan if af tx complete.
1265 *
1266 * @cfg: common configuration struct.
1267 *
1268 */
1269 static void
brcmf_p2p_stop_wait_next_action_frame(struct brcmf_cfg80211_info * cfg)1270 brcmf_p2p_stop_wait_next_action_frame(struct brcmf_cfg80211_info *cfg)
1271 {
1272 struct brcmf_p2p_info *p2p = &cfg->p2p;
1273 struct brcmf_if *ifp = cfg->escan_info.ifp;
1274
1275 if (test_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status) &&
1276 (test_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status) ||
1277 test_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status))) {
1278 brcmf_dbg(TRACE, "*** Wake UP ** abort actframe iovar\n");
1279 /* if channel is not zero, "actfame" uses off channel scan.
1280 * So abort scan for off channel completion.
1281 */
1282 if (p2p->af_sent_channel)
1283 brcmf_notify_escan_complete(cfg, ifp, true, true);
1284 } else if (test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_AF_LISTEN,
1285 &p2p->status)) {
1286 brcmf_dbg(TRACE, "*** Wake UP ** abort listen for next af frame\n");
1287 /* So abort scan to cancel listen */
1288 brcmf_notify_escan_complete(cfg, ifp, true, true);
1289 }
1290 }
1291
1292
1293 /**
1294 * brcmf_p2p_gon_req_collision() - Check if go negotiaton collission
1295 *
1296 * @p2p: p2p device info struct.
1297 *
1298 * return true if recevied action frame is to be dropped.
1299 */
1300 static bool
brcmf_p2p_gon_req_collision(struct brcmf_p2p_info * p2p,u8 * mac)1301 brcmf_p2p_gon_req_collision(struct brcmf_p2p_info *p2p, u8 *mac)
1302 {
1303 struct brcmf_cfg80211_info *cfg = p2p->cfg;
1304 struct brcmf_if *ifp;
1305
1306 brcmf_dbg(TRACE, "Enter\n");
1307
1308 if (!test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status) ||
1309 !p2p->gon_req_action)
1310 return false;
1311
1312 brcmf_dbg(TRACE, "GO Negotiation Request COLLISION !!!\n");
1313 /* if sa(peer) addr is less than da(my) addr, then this device
1314 * process peer's gon request and block to send gon req.
1315 * if not (sa addr > da addr),
1316 * this device will process gon request and drop gon req of peer.
1317 */
1318 ifp = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif->ifp;
1319 if (memcmp(mac, ifp->mac_addr, ETH_ALEN) < 0) {
1320 brcmf_dbg(INFO, "Block transmit gon req !!!\n");
1321 p2p->block_gon_req_tx = true;
1322 /* if we are finding a common channel for sending af,
1323 * do not scan more to block to send current gon req
1324 */
1325 if (test_and_clear_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL,
1326 &p2p->status))
1327 complete(&p2p->afx_hdl.act_frm_scan);
1328 if (test_and_clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME,
1329 &p2p->status))
1330 brcmf_p2p_stop_wait_next_action_frame(cfg);
1331 return false;
1332 }
1333
1334 /* drop gon request of peer to process gon request by this device. */
1335 brcmf_dbg(INFO, "Drop received gon req !!!\n");
1336
1337 return true;
1338 }
1339
1340
1341 /**
1342 * brcmf_p2p_notify_action_frame_rx() - received action frame.
1343 *
1344 * @ifp: interfac control.
1345 * @e: event message. Not used, to make it usable for fweh event dispatcher.
1346 * @data: payload of message, containing action frame data.
1347 *
1348 */
brcmf_p2p_notify_action_frame_rx(struct brcmf_if * ifp,const struct brcmf_event_msg * e,void * data)1349 int brcmf_p2p_notify_action_frame_rx(struct brcmf_if *ifp,
1350 const struct brcmf_event_msg *e,
1351 void *data)
1352 {
1353 struct brcmf_cfg80211_info *cfg = ifp->drvr->config;
1354 struct brcmf_p2p_info *p2p = &cfg->p2p;
1355 struct afx_hdl *afx_hdl = &p2p->afx_hdl;
1356 struct wireless_dev *wdev;
1357 u32 mgmt_frame_len = e->datalen - sizeof(struct brcmf_rx_mgmt_data);
1358 struct brcmf_rx_mgmt_data *rxframe = (struct brcmf_rx_mgmt_data *)data;
1359 u8 *frame = (u8 *)(rxframe + 1);
1360 struct brcmf_p2p_pub_act_frame *act_frm;
1361 struct brcmf_p2psd_gas_pub_act_frame *sd_act_frm;
1362 struct brcmu_chan ch;
1363 struct ieee80211_mgmt *mgmt_frame;
1364 s32 freq;
1365 u16 mgmt_type;
1366 u8 action;
1367
1368 if (e->datalen < sizeof(*rxframe)) {
1369 brcmf_dbg(SCAN, "Event data to small. Ignore\n");
1370 return 0;
1371 }
1372
1373 ch.chspec = be16_to_cpu(rxframe->chanspec);
1374 cfg->d11inf.decchspec(&ch);
1375 /* Check if wpa_supplicant has registered for this frame */
1376 brcmf_dbg(INFO, "ifp->vif->mgmt_rx_reg %04x\n", ifp->vif->mgmt_rx_reg);
1377 mgmt_type = (IEEE80211_STYPE_ACTION & IEEE80211_FCTL_STYPE) >> 4;
1378 if ((ifp->vif->mgmt_rx_reg & BIT(mgmt_type)) == 0)
1379 return 0;
1380
1381 brcmf_p2p_print_actframe(false, frame, mgmt_frame_len);
1382
1383 action = P2P_PAF_SUBTYPE_INVALID;
1384 if (brcmf_p2p_is_pub_action(frame, mgmt_frame_len)) {
1385 act_frm = (struct brcmf_p2p_pub_act_frame *)frame;
1386 action = act_frm->subtype;
1387 if ((action == P2P_PAF_GON_REQ) &&
1388 (brcmf_p2p_gon_req_collision(p2p, (u8 *)e->addr))) {
1389 if (test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL,
1390 &p2p->status) &&
1391 (ether_addr_equal(afx_hdl->tx_dst_addr, e->addr))) {
1392 afx_hdl->peer_chan = ch.chnum;
1393 brcmf_dbg(INFO, "GON request: Peer found, channel=%d\n",
1394 afx_hdl->peer_chan);
1395 complete(&afx_hdl->act_frm_scan);
1396 }
1397 return 0;
1398 }
1399 /* After complete GO Negotiation, roll back to mpc mode */
1400 if ((action == P2P_PAF_GON_CONF) ||
1401 (action == P2P_PAF_PROVDIS_RSP))
1402 brcmf_set_mpc(ifp, 1);
1403 if (action == P2P_PAF_GON_CONF) {
1404 brcmf_dbg(TRACE, "P2P: GO_NEG_PHASE status cleared\n");
1405 clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status);
1406 }
1407 } else if (brcmf_p2p_is_gas_action(frame, mgmt_frame_len)) {
1408 sd_act_frm = (struct brcmf_p2psd_gas_pub_act_frame *)frame;
1409 action = sd_act_frm->action;
1410 }
1411
1412 if (test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status) &&
1413 (p2p->next_af_subtype == action)) {
1414 brcmf_dbg(TRACE, "We got a right next frame! (%d)\n", action);
1415 clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME,
1416 &p2p->status);
1417 /* Stop waiting for next AF. */
1418 brcmf_p2p_stop_wait_next_action_frame(cfg);
1419 }
1420
1421 mgmt_frame = kzalloc(offsetof(struct ieee80211_mgmt, u) +
1422 mgmt_frame_len, GFP_KERNEL);
1423 if (!mgmt_frame) {
1424 brcmf_err("No memory available for action frame\n");
1425 return -ENOMEM;
1426 }
1427 memcpy(mgmt_frame->da, ifp->mac_addr, ETH_ALEN);
1428 brcmf_fil_cmd_data_get(ifp, BRCMF_C_GET_BSSID, mgmt_frame->bssid,
1429 ETH_ALEN);
1430 memcpy(mgmt_frame->sa, e->addr, ETH_ALEN);
1431 mgmt_frame->frame_control = cpu_to_le16(IEEE80211_STYPE_ACTION);
1432 memcpy(&mgmt_frame->u, frame, mgmt_frame_len);
1433 mgmt_frame_len += offsetof(struct ieee80211_mgmt, u);
1434
1435 freq = ieee80211_channel_to_frequency(ch.chnum,
1436 ch.band == BRCMU_CHAN_BAND_2G ?
1437 IEEE80211_BAND_2GHZ :
1438 IEEE80211_BAND_5GHZ);
1439
1440 wdev = &ifp->vif->wdev;
1441 cfg80211_rx_mgmt(wdev, freq, 0, (u8 *)mgmt_frame, mgmt_frame_len, 0);
1442
1443 kfree(mgmt_frame);
1444 return 0;
1445 }
1446
1447
1448 /**
1449 * brcmf_p2p_notify_action_tx_complete() - transmit action frame complete
1450 *
1451 * @ifp: interfac control.
1452 * @e: event message. Not used, to make it usable for fweh event dispatcher.
1453 * @data: not used.
1454 *
1455 */
brcmf_p2p_notify_action_tx_complete(struct brcmf_if * ifp,const struct brcmf_event_msg * e,void * data)1456 int brcmf_p2p_notify_action_tx_complete(struct brcmf_if *ifp,
1457 const struct brcmf_event_msg *e,
1458 void *data)
1459 {
1460 struct brcmf_cfg80211_info *cfg = ifp->drvr->config;
1461 struct brcmf_p2p_info *p2p = &cfg->p2p;
1462
1463 brcmf_dbg(INFO, "Enter: event %s, status=%d\n",
1464 e->event_code == BRCMF_E_ACTION_FRAME_OFF_CHAN_COMPLETE ?
1465 "ACTION_FRAME_OFF_CHAN_COMPLETE" : "ACTION_FRAME_COMPLETE",
1466 e->status);
1467
1468 if (!test_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status))
1469 return 0;
1470
1471 if (e->event_code == BRCMF_E_ACTION_FRAME_COMPLETE) {
1472 if (e->status == BRCMF_E_STATUS_SUCCESS) {
1473 set_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED,
1474 &p2p->status);
1475 if (!p2p->wait_for_offchan_complete)
1476 complete(&p2p->send_af_done);
1477 } else {
1478 set_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status);
1479 /* If there is no ack, we don't need to wait for
1480 * WLC_E_ACTION_FRAME_OFFCHAN_COMPLETE event
1481 */
1482 brcmf_p2p_stop_wait_next_action_frame(cfg);
1483 }
1484
1485 } else {
1486 complete(&p2p->send_af_done);
1487 }
1488 return 0;
1489 }
1490
1491
1492 /**
1493 * brcmf_p2p_tx_action_frame() - send action frame over fil.
1494 *
1495 * @p2p: p2p info struct for vif.
1496 * @af_params: action frame data/info.
1497 *
1498 * Send an action frame immediately without doing channel synchronization.
1499 *
1500 * This function waits for a completion event before returning.
1501 * The WLC_E_ACTION_FRAME_COMPLETE event will be received when the action
1502 * frame is transmitted.
1503 */
brcmf_p2p_tx_action_frame(struct brcmf_p2p_info * p2p,struct brcmf_fil_af_params_le * af_params)1504 static s32 brcmf_p2p_tx_action_frame(struct brcmf_p2p_info *p2p,
1505 struct brcmf_fil_af_params_le *af_params)
1506 {
1507 struct brcmf_cfg80211_vif *vif;
1508 s32 err = 0;
1509 s32 timeout = 0;
1510
1511 brcmf_dbg(TRACE, "Enter\n");
1512
1513 reinit_completion(&p2p->send_af_done);
1514 clear_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status);
1515 clear_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status);
1516
1517 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif;
1518 err = brcmf_fil_bsscfg_data_set(vif->ifp, "actframe", af_params,
1519 sizeof(*af_params));
1520 if (err) {
1521 brcmf_err(" sending action frame has failed\n");
1522 goto exit;
1523 }
1524
1525 p2p->af_sent_channel = le32_to_cpu(af_params->channel);
1526 p2p->af_tx_sent_jiffies = jiffies;
1527
1528 if (test_bit(BRCMF_P2P_STATUS_DISCOVER_LISTEN, &p2p->status) &&
1529 p2p->af_sent_channel ==
1530 ieee80211_frequency_to_channel(p2p->remain_on_channel.center_freq))
1531 p2p->wait_for_offchan_complete = false;
1532 else
1533 p2p->wait_for_offchan_complete = true;
1534
1535 brcmf_dbg(TRACE, "Waiting for %s tx completion event\n",
1536 (p2p->wait_for_offchan_complete) ?
1537 "off-channel" : "on-channel");
1538
1539 timeout = wait_for_completion_timeout(&p2p->send_af_done,
1540 msecs_to_jiffies(P2P_AF_MAX_WAIT_TIME));
1541
1542 if (test_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status)) {
1543 brcmf_dbg(TRACE, "TX action frame operation is success\n");
1544 } else {
1545 err = -EIO;
1546 brcmf_dbg(TRACE, "TX action frame operation has failed\n");
1547 }
1548 /* clear status bit for action tx */
1549 clear_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status);
1550 clear_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status);
1551
1552 exit:
1553 return err;
1554 }
1555
1556
1557 /**
1558 * brcmf_p2p_pub_af_tx() - public action frame tx routine.
1559 *
1560 * @cfg: driver private data for cfg80211 interface.
1561 * @af_params: action frame data/info.
1562 * @config_af_params: configuration data for action frame.
1563 *
1564 * routine which transmits ation frame public type.
1565 */
brcmf_p2p_pub_af_tx(struct brcmf_cfg80211_info * cfg,struct brcmf_fil_af_params_le * af_params,struct brcmf_config_af_params * config_af_params)1566 static s32 brcmf_p2p_pub_af_tx(struct brcmf_cfg80211_info *cfg,
1567 struct brcmf_fil_af_params_le *af_params,
1568 struct brcmf_config_af_params *config_af_params)
1569 {
1570 struct brcmf_p2p_info *p2p = &cfg->p2p;
1571 struct brcmf_fil_action_frame_le *action_frame;
1572 struct brcmf_p2p_pub_act_frame *act_frm;
1573 s32 err = 0;
1574 u16 ie_len;
1575
1576 action_frame = &af_params->action_frame;
1577 act_frm = (struct brcmf_p2p_pub_act_frame *)(action_frame->data);
1578
1579 config_af_params->extra_listen = true;
1580
1581 switch (act_frm->subtype) {
1582 case P2P_PAF_GON_REQ:
1583 brcmf_dbg(TRACE, "P2P: GO_NEG_PHASE status set\n");
1584 set_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status);
1585 config_af_params->mpc_onoff = 0;
1586 config_af_params->search_channel = true;
1587 p2p->next_af_subtype = act_frm->subtype + 1;
1588 p2p->gon_req_action = true;
1589 /* increase dwell time to wait for RESP frame */
1590 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME);
1591 break;
1592 case P2P_PAF_GON_RSP:
1593 p2p->next_af_subtype = act_frm->subtype + 1;
1594 /* increase dwell time to wait for CONF frame */
1595 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME);
1596 break;
1597 case P2P_PAF_GON_CONF:
1598 /* If we reached till GO Neg confirmation reset the filter */
1599 brcmf_dbg(TRACE, "P2P: GO_NEG_PHASE status cleared\n");
1600 clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status);
1601 /* turn on mpc again if go nego is done */
1602 config_af_params->mpc_onoff = 1;
1603 /* minimize dwell time */
1604 af_params->dwell_time = cpu_to_le32(P2P_AF_MIN_DWELL_TIME);
1605 config_af_params->extra_listen = false;
1606 break;
1607 case P2P_PAF_INVITE_REQ:
1608 config_af_params->search_channel = true;
1609 p2p->next_af_subtype = act_frm->subtype + 1;
1610 /* increase dwell time */
1611 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME);
1612 break;
1613 case P2P_PAF_INVITE_RSP:
1614 /* minimize dwell time */
1615 af_params->dwell_time = cpu_to_le32(P2P_AF_MIN_DWELL_TIME);
1616 config_af_params->extra_listen = false;
1617 break;
1618 case P2P_PAF_DEVDIS_REQ:
1619 config_af_params->search_channel = true;
1620 p2p->next_af_subtype = act_frm->subtype + 1;
1621 /* maximize dwell time to wait for RESP frame */
1622 af_params->dwell_time = cpu_to_le32(P2P_AF_LONG_DWELL_TIME);
1623 break;
1624 case P2P_PAF_DEVDIS_RSP:
1625 /* minimize dwell time */
1626 af_params->dwell_time = cpu_to_le32(P2P_AF_MIN_DWELL_TIME);
1627 config_af_params->extra_listen = false;
1628 break;
1629 case P2P_PAF_PROVDIS_REQ:
1630 ie_len = le16_to_cpu(action_frame->len) -
1631 offsetof(struct brcmf_p2p_pub_act_frame, elts);
1632 if (cfg80211_get_p2p_attr(&act_frm->elts[0], ie_len,
1633 IEEE80211_P2P_ATTR_GROUP_ID,
1634 NULL, 0) < 0)
1635 config_af_params->search_channel = true;
1636 config_af_params->mpc_onoff = 0;
1637 p2p->next_af_subtype = act_frm->subtype + 1;
1638 /* increase dwell time to wait for RESP frame */
1639 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME);
1640 break;
1641 case P2P_PAF_PROVDIS_RSP:
1642 /* wpa_supplicant send go nego req right after prov disc */
1643 p2p->next_af_subtype = P2P_PAF_GON_REQ;
1644 /* increase dwell time to MED level */
1645 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME);
1646 config_af_params->extra_listen = false;
1647 break;
1648 default:
1649 brcmf_err("Unknown p2p pub act frame subtype: %d\n",
1650 act_frm->subtype);
1651 err = -EINVAL;
1652 }
1653 return err;
1654 }
1655
1656 /**
1657 * brcmf_p2p_send_action_frame() - send action frame .
1658 *
1659 * @cfg: driver private data for cfg80211 interface.
1660 * @ndev: net device to transmit on.
1661 * @af_params: configuration data for action frame.
1662 */
brcmf_p2p_send_action_frame(struct brcmf_cfg80211_info * cfg,struct net_device * ndev,struct brcmf_fil_af_params_le * af_params)1663 bool brcmf_p2p_send_action_frame(struct brcmf_cfg80211_info *cfg,
1664 struct net_device *ndev,
1665 struct brcmf_fil_af_params_le *af_params)
1666 {
1667 struct brcmf_p2p_info *p2p = &cfg->p2p;
1668 struct brcmf_if *ifp = netdev_priv(ndev);
1669 struct brcmf_fil_action_frame_le *action_frame;
1670 struct brcmf_config_af_params config_af_params;
1671 struct afx_hdl *afx_hdl = &p2p->afx_hdl;
1672 u16 action_frame_len;
1673 bool ack = false;
1674 u8 category;
1675 u8 action;
1676 s32 tx_retry;
1677 s32 extra_listen_time;
1678 uint delta_ms;
1679
1680 action_frame = &af_params->action_frame;
1681 action_frame_len = le16_to_cpu(action_frame->len);
1682
1683 brcmf_p2p_print_actframe(true, action_frame->data, action_frame_len);
1684
1685 /* Add the default dwell time. Dwell time to stay off-channel */
1686 /* to wait for a response action frame after transmitting an */
1687 /* GO Negotiation action frame */
1688 af_params->dwell_time = cpu_to_le32(P2P_AF_DWELL_TIME);
1689
1690 category = action_frame->data[DOT11_ACTION_CAT_OFF];
1691 action = action_frame->data[DOT11_ACTION_ACT_OFF];
1692
1693 /* initialize variables */
1694 p2p->next_af_subtype = P2P_PAF_SUBTYPE_INVALID;
1695 p2p->gon_req_action = false;
1696
1697 /* config parameters */
1698 config_af_params.mpc_onoff = -1;
1699 config_af_params.search_channel = false;
1700 config_af_params.extra_listen = false;
1701
1702 if (brcmf_p2p_is_pub_action(action_frame->data, action_frame_len)) {
1703 /* p2p public action frame process */
1704 if (brcmf_p2p_pub_af_tx(cfg, af_params, &config_af_params)) {
1705 /* Just send unknown subtype frame with */
1706 /* default parameters. */
1707 brcmf_err("P2P Public action frame, unknown subtype.\n");
1708 }
1709 } else if (brcmf_p2p_is_gas_action(action_frame->data,
1710 action_frame_len)) {
1711 /* service discovery process */
1712 if (action == P2PSD_ACTION_ID_GAS_IREQ ||
1713 action == P2PSD_ACTION_ID_GAS_CREQ) {
1714 /* configure service discovery query frame */
1715 config_af_params.search_channel = true;
1716
1717 /* save next af suptype to cancel */
1718 /* remaining dwell time */
1719 p2p->next_af_subtype = action + 1;
1720
1721 af_params->dwell_time =
1722 cpu_to_le32(P2P_AF_MED_DWELL_TIME);
1723 } else if (action == P2PSD_ACTION_ID_GAS_IRESP ||
1724 action == P2PSD_ACTION_ID_GAS_CRESP) {
1725 /* configure service discovery response frame */
1726 af_params->dwell_time =
1727 cpu_to_le32(P2P_AF_MIN_DWELL_TIME);
1728 } else {
1729 brcmf_err("Unknown action type: %d\n", action);
1730 goto exit;
1731 }
1732 } else if (brcmf_p2p_is_p2p_action(action_frame->data,
1733 action_frame_len)) {
1734 /* do not configure anything. it will be */
1735 /* sent with a default configuration */
1736 } else {
1737 brcmf_err("Unknown Frame: category 0x%x, action 0x%x\n",
1738 category, action);
1739 return false;
1740 }
1741
1742 /* if connecting on primary iface, sleep for a while before sending
1743 * af tx for VSDB
1744 */
1745 if (test_bit(BRCMF_VIF_STATUS_CONNECTING,
1746 &p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->sme_state))
1747 msleep(50);
1748
1749 /* if scan is ongoing, abort current scan. */
1750 if (test_bit(BRCMF_SCAN_STATUS_BUSY, &cfg->scan_status))
1751 brcmf_abort_scanning(cfg);
1752
1753 memcpy(afx_hdl->tx_dst_addr, action_frame->da, ETH_ALEN);
1754
1755 /* To make sure to send successfully action frame, turn off mpc */
1756 if (config_af_params.mpc_onoff == 0)
1757 brcmf_set_mpc(ifp, 0);
1758
1759 /* set status and destination address before sending af */
1760 if (p2p->next_af_subtype != P2P_PAF_SUBTYPE_INVALID) {
1761 /* set status to cancel the remained dwell time in rx process */
1762 set_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status);
1763 }
1764
1765 p2p->af_sent_channel = 0;
1766 set_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status);
1767 /* validate channel and p2p ies */
1768 if (config_af_params.search_channel &&
1769 IS_P2P_SOCIAL_CHANNEL(le32_to_cpu(af_params->channel)) &&
1770 p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif->saved_ie.probe_req_ie_len) {
1771 afx_hdl = &p2p->afx_hdl;
1772 afx_hdl->peer_listen_chan = le32_to_cpu(af_params->channel);
1773
1774 if (brcmf_p2p_af_searching_channel(p2p) ==
1775 P2P_INVALID_CHANNEL) {
1776 brcmf_err("Couldn't find peer's channel.\n");
1777 goto exit;
1778 }
1779
1780 /* Abort scan even for VSDB scenarios. Scan gets aborted in
1781 * firmware but after the check of piggyback algorithm. To take
1782 * care of current piggback algo, lets abort the scan here
1783 * itself.
1784 */
1785 brcmf_notify_escan_complete(cfg, ifp, true, true);
1786
1787 /* update channel */
1788 af_params->channel = cpu_to_le32(afx_hdl->peer_chan);
1789 }
1790
1791 tx_retry = 0;
1792 while (!p2p->block_gon_req_tx &&
1793 (ack == false) && (tx_retry < P2P_AF_TX_MAX_RETRY)) {
1794 ack = !brcmf_p2p_tx_action_frame(p2p, af_params);
1795 tx_retry++;
1796 }
1797 if (ack == false) {
1798 brcmf_err("Failed to send Action Frame(retry %d)\n", tx_retry);
1799 clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status);
1800 }
1801
1802 exit:
1803 clear_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status);
1804
1805 /* WAR: sometimes dongle does not keep the dwell time of 'actframe'.
1806 * if we coundn't get the next action response frame and dongle does
1807 * not keep the dwell time, go to listen state again to get next action
1808 * response frame.
1809 */
1810 if (ack && config_af_params.extra_listen && !p2p->block_gon_req_tx &&
1811 test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status) &&
1812 p2p->af_sent_channel == afx_hdl->my_listen_chan) {
1813 delta_ms = jiffies_to_msecs(jiffies - p2p->af_tx_sent_jiffies);
1814 if (le32_to_cpu(af_params->dwell_time) > delta_ms)
1815 extra_listen_time = le32_to_cpu(af_params->dwell_time) -
1816 delta_ms;
1817 else
1818 extra_listen_time = 0;
1819 if (extra_listen_time > 50) {
1820 set_bit(BRCMF_P2P_STATUS_WAITING_NEXT_AF_LISTEN,
1821 &p2p->status);
1822 brcmf_dbg(INFO, "Wait more time! actual af time:%d, calculated extra listen:%d\n",
1823 le32_to_cpu(af_params->dwell_time),
1824 extra_listen_time);
1825 extra_listen_time += 100;
1826 if (!brcmf_p2p_discover_listen(p2p,
1827 p2p->af_sent_channel,
1828 extra_listen_time)) {
1829 unsigned long duration;
1830
1831 extra_listen_time += 100;
1832 duration = msecs_to_jiffies(extra_listen_time);
1833 wait_for_completion_timeout(&p2p->wait_next_af,
1834 duration);
1835 }
1836 clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_AF_LISTEN,
1837 &p2p->status);
1838 }
1839 }
1840
1841 if (p2p->block_gon_req_tx) {
1842 /* if ack is true, supplicant will wait more time(100ms).
1843 * so we will return it as a success to get more time .
1844 */
1845 p2p->block_gon_req_tx = false;
1846 ack = true;
1847 }
1848
1849 clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status);
1850 /* if all done, turn mpc on again */
1851 if (config_af_params.mpc_onoff == 1)
1852 brcmf_set_mpc(ifp, 1);
1853
1854 return ack;
1855 }
1856
1857 /**
1858 * brcmf_p2p_notify_rx_mgmt_p2p_probereq() - Event handler for p2p probe req.
1859 *
1860 * @ifp: interface pointer for which event was received.
1861 * @e: even message.
1862 * @data: payload of event message (probe request).
1863 */
brcmf_p2p_notify_rx_mgmt_p2p_probereq(struct brcmf_if * ifp,const struct brcmf_event_msg * e,void * data)1864 s32 brcmf_p2p_notify_rx_mgmt_p2p_probereq(struct brcmf_if *ifp,
1865 const struct brcmf_event_msg *e,
1866 void *data)
1867 {
1868 struct brcmf_cfg80211_info *cfg = ifp->drvr->config;
1869 struct brcmf_p2p_info *p2p = &cfg->p2p;
1870 struct afx_hdl *afx_hdl = &p2p->afx_hdl;
1871 struct brcmf_cfg80211_vif *vif = ifp->vif;
1872 struct brcmf_rx_mgmt_data *rxframe = (struct brcmf_rx_mgmt_data *)data;
1873 u16 chanspec = be16_to_cpu(rxframe->chanspec);
1874 struct brcmu_chan ch;
1875 u8 *mgmt_frame;
1876 u32 mgmt_frame_len;
1877 s32 freq;
1878 u16 mgmt_type;
1879
1880 brcmf_dbg(INFO, "Enter: event %d reason %d\n", e->event_code,
1881 e->reason);
1882
1883 if (e->datalen < sizeof(*rxframe)) {
1884 brcmf_dbg(SCAN, "Event data to small. Ignore\n");
1885 return 0;
1886 }
1887
1888 ch.chspec = be16_to_cpu(rxframe->chanspec);
1889 cfg->d11inf.decchspec(&ch);
1890
1891 if (test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status) &&
1892 (ether_addr_equal(afx_hdl->tx_dst_addr, e->addr))) {
1893 afx_hdl->peer_chan = ch.chnum;
1894 brcmf_dbg(INFO, "PROBE REQUEST: Peer found, channel=%d\n",
1895 afx_hdl->peer_chan);
1896 complete(&afx_hdl->act_frm_scan);
1897 }
1898
1899 /* Firmware sends us two proberesponses for each idx one. At the */
1900 /* moment anything but bsscfgidx 0 is passed up to supplicant */
1901 if (e->bsscfgidx == 0)
1902 return 0;
1903
1904 /* Filter any P2P probe reqs arriving during the GO-NEG Phase */
1905 if (test_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status)) {
1906 brcmf_dbg(INFO, "Filtering P2P probe_req in GO-NEG phase\n");
1907 return 0;
1908 }
1909
1910 /* Check if wpa_supplicant has registered for this frame */
1911 brcmf_dbg(INFO, "vif->mgmt_rx_reg %04x\n", vif->mgmt_rx_reg);
1912 mgmt_type = (IEEE80211_STYPE_PROBE_REQ & IEEE80211_FCTL_STYPE) >> 4;
1913 if ((vif->mgmt_rx_reg & BIT(mgmt_type)) == 0)
1914 return 0;
1915
1916 mgmt_frame = (u8 *)(rxframe + 1);
1917 mgmt_frame_len = e->datalen - sizeof(*rxframe);
1918 freq = ieee80211_channel_to_frequency(ch.chnum,
1919 ch.band == BRCMU_CHAN_BAND_2G ?
1920 IEEE80211_BAND_2GHZ :
1921 IEEE80211_BAND_5GHZ);
1922
1923 cfg80211_rx_mgmt(&vif->wdev, freq, 0, mgmt_frame, mgmt_frame_len, 0);
1924
1925 brcmf_dbg(INFO, "mgmt_frame_len (%d) , e->datalen (%d), chanspec (%04x), freq (%d)\n",
1926 mgmt_frame_len, e->datalen, chanspec, freq);
1927
1928 return 0;
1929 }
1930
1931
1932 /**
1933 * brcmf_p2p_get_current_chanspec() - Get current operation channel.
1934 *
1935 * @p2p: P2P specific data.
1936 * @chanspec: chanspec to be returned.
1937 */
brcmf_p2p_get_current_chanspec(struct brcmf_p2p_info * p2p,u16 * chanspec)1938 static void brcmf_p2p_get_current_chanspec(struct brcmf_p2p_info *p2p,
1939 u16 *chanspec)
1940 {
1941 struct brcmf_if *ifp;
1942 u8 mac_addr[ETH_ALEN];
1943 struct brcmu_chan ch;
1944 struct brcmf_bss_info_le *bi;
1945 u8 *buf;
1946
1947 ifp = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->ifp;
1948
1949 if (brcmf_fil_cmd_data_get(ifp, BRCMF_C_GET_BSSID, mac_addr,
1950 ETH_ALEN) == 0) {
1951 buf = kzalloc(WL_BSS_INFO_MAX, GFP_KERNEL);
1952 if (buf != NULL) {
1953 *(__le32 *)buf = cpu_to_le32(WL_BSS_INFO_MAX);
1954 if (brcmf_fil_cmd_data_get(ifp, BRCMF_C_GET_BSS_INFO,
1955 buf, WL_BSS_INFO_MAX) == 0) {
1956 bi = (struct brcmf_bss_info_le *)(buf + 4);
1957 *chanspec = le16_to_cpu(bi->chanspec);
1958 kfree(buf);
1959 return;
1960 }
1961 kfree(buf);
1962 }
1963 }
1964 /* Use default channel for P2P */
1965 ch.chnum = BRCMF_P2P_TEMP_CHAN;
1966 ch.bw = BRCMU_CHAN_BW_20;
1967 p2p->cfg->d11inf.encchspec(&ch);
1968 *chanspec = ch.chspec;
1969 }
1970
1971 /**
1972 * Change a P2P Role.
1973 * Parameters:
1974 * @mac: MAC address of the BSS to change a role
1975 * Returns 0 if success.
1976 */
brcmf_p2p_ifchange(struct brcmf_cfg80211_info * cfg,enum brcmf_fil_p2p_if_types if_type)1977 int brcmf_p2p_ifchange(struct brcmf_cfg80211_info *cfg,
1978 enum brcmf_fil_p2p_if_types if_type)
1979 {
1980 struct brcmf_p2p_info *p2p = &cfg->p2p;
1981 struct brcmf_cfg80211_vif *vif;
1982 struct brcmf_fil_p2p_if_le if_request;
1983 s32 err;
1984 u16 chanspec;
1985
1986 brcmf_dbg(TRACE, "Enter\n");
1987
1988 vif = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif;
1989 if (!vif) {
1990 brcmf_err("vif for P2PAPI_BSSCFG_PRIMARY does not exist\n");
1991 return -EPERM;
1992 }
1993 brcmf_notify_escan_complete(cfg, vif->ifp, true, true);
1994 vif = p2p->bss_idx[P2PAPI_BSSCFG_CONNECTION].vif;
1995 if (!vif) {
1996 brcmf_err("vif for P2PAPI_BSSCFG_CONNECTION does not exist\n");
1997 return -EPERM;
1998 }
1999 brcmf_set_mpc(vif->ifp, 0);
2000
2001 /* In concurrency case, STA may be already associated in a particular */
2002 /* channel. so retrieve the current channel of primary interface and */
2003 /* then start the virtual interface on that. */
2004 brcmf_p2p_get_current_chanspec(p2p, &chanspec);
2005
2006 if_request.type = cpu_to_le16((u16)if_type);
2007 if_request.chspec = cpu_to_le16(chanspec);
2008 memcpy(if_request.addr, p2p->int_addr, sizeof(if_request.addr));
2009
2010 brcmf_cfg80211_arm_vif_event(cfg, vif);
2011 err = brcmf_fil_iovar_data_set(vif->ifp, "p2p_ifupd", &if_request,
2012 sizeof(if_request));
2013 if (err) {
2014 brcmf_err("p2p_ifupd FAILED, err=%d\n", err);
2015 brcmf_cfg80211_arm_vif_event(cfg, NULL);
2016 return err;
2017 }
2018 err = brcmf_cfg80211_wait_vif_event_timeout(cfg, BRCMF_E_IF_CHANGE,
2019 msecs_to_jiffies(1500));
2020 brcmf_cfg80211_arm_vif_event(cfg, NULL);
2021 if (!err) {
2022 brcmf_err("No BRCMF_E_IF_CHANGE event received\n");
2023 return -EIO;
2024 }
2025
2026 err = brcmf_fil_cmd_int_set(vif->ifp, BRCMF_C_SET_SCB_TIMEOUT,
2027 BRCMF_SCB_TIMEOUT_VALUE);
2028
2029 return err;
2030 }
2031
brcmf_p2p_request_p2p_if(struct brcmf_p2p_info * p2p,struct brcmf_if * ifp,u8 ea[ETH_ALEN],enum brcmf_fil_p2p_if_types iftype)2032 static int brcmf_p2p_request_p2p_if(struct brcmf_p2p_info *p2p,
2033 struct brcmf_if *ifp, u8 ea[ETH_ALEN],
2034 enum brcmf_fil_p2p_if_types iftype)
2035 {
2036 struct brcmf_fil_p2p_if_le if_request;
2037 int err;
2038 u16 chanspec;
2039
2040 /* we need a default channel */
2041 brcmf_p2p_get_current_chanspec(p2p, &chanspec);
2042
2043 /* fill the firmware request */
2044 memcpy(if_request.addr, ea, ETH_ALEN);
2045 if_request.type = cpu_to_le16((u16)iftype);
2046 if_request.chspec = cpu_to_le16(chanspec);
2047
2048 err = brcmf_fil_iovar_data_set(ifp, "p2p_ifadd", &if_request,
2049 sizeof(if_request));
2050 if (err)
2051 return err;
2052
2053 return err;
2054 }
2055
brcmf_p2p_disable_p2p_if(struct brcmf_cfg80211_vif * vif)2056 static int brcmf_p2p_disable_p2p_if(struct brcmf_cfg80211_vif *vif)
2057 {
2058 struct brcmf_cfg80211_info *cfg = wdev_to_cfg(&vif->wdev);
2059 struct net_device *pri_ndev = cfg_to_ndev(cfg);
2060 struct brcmf_if *ifp = netdev_priv(pri_ndev);
2061 u8 *addr = vif->wdev.netdev->dev_addr;
2062
2063 return brcmf_fil_iovar_data_set(ifp, "p2p_ifdis", addr, ETH_ALEN);
2064 }
2065
brcmf_p2p_release_p2p_if(struct brcmf_cfg80211_vif * vif)2066 static int brcmf_p2p_release_p2p_if(struct brcmf_cfg80211_vif *vif)
2067 {
2068 struct brcmf_cfg80211_info *cfg = wdev_to_cfg(&vif->wdev);
2069 struct net_device *pri_ndev = cfg_to_ndev(cfg);
2070 struct brcmf_if *ifp = netdev_priv(pri_ndev);
2071 u8 *addr = vif->wdev.netdev->dev_addr;
2072
2073 return brcmf_fil_iovar_data_set(ifp, "p2p_ifdel", addr, ETH_ALEN);
2074 }
2075
2076 /**
2077 * brcmf_p2p_create_p2pdev() - create a P2P_DEVICE virtual interface.
2078 *
2079 * @p2p: P2P specific data.
2080 * @wiphy: wiphy device of new interface.
2081 * @addr: mac address for this new interface.
2082 */
brcmf_p2p_create_p2pdev(struct brcmf_p2p_info * p2p,struct wiphy * wiphy,u8 * addr)2083 static struct wireless_dev *brcmf_p2p_create_p2pdev(struct brcmf_p2p_info *p2p,
2084 struct wiphy *wiphy,
2085 u8 *addr)
2086 {
2087 struct brcmf_cfg80211_vif *p2p_vif;
2088 struct brcmf_if *p2p_ifp;
2089 struct brcmf_if *pri_ifp;
2090 int err;
2091 u32 bssidx;
2092
2093 if (p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif)
2094 return ERR_PTR(-ENOSPC);
2095
2096 p2p_vif = brcmf_alloc_vif(p2p->cfg, NL80211_IFTYPE_P2P_DEVICE,
2097 false);
2098 if (IS_ERR(p2p_vif)) {
2099 brcmf_err("could not create discovery vif\n");
2100 return (struct wireless_dev *)p2p_vif;
2101 }
2102
2103 pri_ifp = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->ifp;
2104 brcmf_p2p_generate_bss_mac(p2p, addr);
2105 brcmf_p2p_set_firmware(pri_ifp, p2p->dev_addr);
2106
2107 brcmf_cfg80211_arm_vif_event(p2p->cfg, p2p_vif);
2108 brcmf_fweh_p2pdev_setup(pri_ifp, true);
2109
2110 /* Initialize P2P Discovery in the firmware */
2111 err = brcmf_fil_iovar_int_set(pri_ifp, "p2p_disc", 1);
2112 if (err < 0) {
2113 brcmf_err("set p2p_disc error\n");
2114 brcmf_fweh_p2pdev_setup(pri_ifp, false);
2115 brcmf_cfg80211_arm_vif_event(p2p->cfg, NULL);
2116 goto fail;
2117 }
2118
2119 /* wait for firmware event */
2120 err = brcmf_cfg80211_wait_vif_event_timeout(p2p->cfg, BRCMF_E_IF_ADD,
2121 msecs_to_jiffies(1500));
2122 brcmf_cfg80211_arm_vif_event(p2p->cfg, NULL);
2123 brcmf_fweh_p2pdev_setup(pri_ifp, false);
2124 if (!err) {
2125 brcmf_err("timeout occurred\n");
2126 err = -EIO;
2127 goto fail;
2128 }
2129
2130 /* discovery interface created */
2131 p2p_ifp = p2p_vif->ifp;
2132 p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif = p2p_vif;
2133 memcpy(p2p_ifp->mac_addr, p2p->dev_addr, ETH_ALEN);
2134 memcpy(&p2p_vif->wdev.address, p2p->dev_addr, sizeof(p2p->dev_addr));
2135
2136 /* verify bsscfg index for P2P discovery */
2137 err = brcmf_fil_iovar_int_get(pri_ifp, "p2p_dev", &bssidx);
2138 if (err < 0) {
2139 brcmf_err("retrieving discover bsscfg index failed\n");
2140 goto fail;
2141 }
2142
2143 WARN_ON(p2p_ifp->bssidx != bssidx);
2144
2145 init_completion(&p2p->send_af_done);
2146 INIT_WORK(&p2p->afx_hdl.afx_work, brcmf_p2p_afx_handler);
2147 init_completion(&p2p->afx_hdl.act_frm_scan);
2148 init_completion(&p2p->wait_next_af);
2149
2150 return &p2p_vif->wdev;
2151
2152 fail:
2153 brcmf_free_vif(p2p_vif);
2154 return ERR_PTR(err);
2155 }
2156
2157 /**
2158 * brcmf_p2p_add_vif() - create a new P2P virtual interface.
2159 *
2160 * @wiphy: wiphy device of new interface.
2161 * @name: name of the new interface.
2162 * @name_assign_type: origin of the interface name
2163 * @type: nl80211 interface type.
2164 * @flags: not used.
2165 * @params: contains mac address for P2P device.
2166 */
brcmf_p2p_add_vif(struct wiphy * wiphy,const char * name,unsigned char name_assign_type,enum nl80211_iftype type,u32 * flags,struct vif_params * params)2167 struct wireless_dev *brcmf_p2p_add_vif(struct wiphy *wiphy, const char *name,
2168 unsigned char name_assign_type,
2169 enum nl80211_iftype type, u32 *flags,
2170 struct vif_params *params)
2171 {
2172 struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
2173 struct brcmf_if *ifp = netdev_priv(cfg_to_ndev(cfg));
2174 struct brcmf_cfg80211_vif *vif;
2175 enum brcmf_fil_p2p_if_types iftype;
2176 int err;
2177
2178 if (brcmf_cfg80211_vif_event_armed(cfg))
2179 return ERR_PTR(-EBUSY);
2180
2181 brcmf_dbg(INFO, "adding vif \"%s\" (type=%d)\n", name, type);
2182
2183 switch (type) {
2184 case NL80211_IFTYPE_P2P_CLIENT:
2185 iftype = BRCMF_FIL_P2P_IF_CLIENT;
2186 break;
2187 case NL80211_IFTYPE_P2P_GO:
2188 iftype = BRCMF_FIL_P2P_IF_GO;
2189 break;
2190 case NL80211_IFTYPE_P2P_DEVICE:
2191 return brcmf_p2p_create_p2pdev(&cfg->p2p, wiphy,
2192 params->macaddr);
2193 default:
2194 return ERR_PTR(-EOPNOTSUPP);
2195 }
2196
2197 vif = brcmf_alloc_vif(cfg, type, false);
2198 if (IS_ERR(vif))
2199 return (struct wireless_dev *)vif;
2200 brcmf_cfg80211_arm_vif_event(cfg, vif);
2201
2202 err = brcmf_p2p_request_p2p_if(&cfg->p2p, ifp, cfg->p2p.int_addr,
2203 iftype);
2204 if (err) {
2205 brcmf_cfg80211_arm_vif_event(cfg, NULL);
2206 goto fail;
2207 }
2208
2209 /* wait for firmware event */
2210 err = brcmf_cfg80211_wait_vif_event_timeout(cfg, BRCMF_E_IF_ADD,
2211 msecs_to_jiffies(1500));
2212 brcmf_cfg80211_arm_vif_event(cfg, NULL);
2213 if (!err) {
2214 brcmf_err("timeout occurred\n");
2215 err = -EIO;
2216 goto fail;
2217 }
2218
2219 /* interface created in firmware */
2220 ifp = vif->ifp;
2221 if (!ifp) {
2222 brcmf_err("no if pointer provided\n");
2223 err = -ENOENT;
2224 goto fail;
2225 }
2226
2227 strncpy(ifp->ndev->name, name, sizeof(ifp->ndev->name) - 1);
2228 ifp->ndev->name_assign_type = name_assign_type;
2229 err = brcmf_net_attach(ifp, true);
2230 if (err) {
2231 brcmf_err("Registering netdevice failed\n");
2232 goto fail;
2233 }
2234
2235 cfg->p2p.bss_idx[P2PAPI_BSSCFG_CONNECTION].vif = vif;
2236 /* Disable firmware roaming for P2P interface */
2237 brcmf_fil_iovar_int_set(ifp, "roam_off", 1);
2238 if (iftype == BRCMF_FIL_P2P_IF_GO) {
2239 /* set station timeout for p2p */
2240 brcmf_fil_cmd_int_set(ifp, BRCMF_C_SET_SCB_TIMEOUT,
2241 BRCMF_SCB_TIMEOUT_VALUE);
2242 }
2243 return &ifp->vif->wdev;
2244
2245 fail:
2246 brcmf_free_vif(vif);
2247 return ERR_PTR(err);
2248 }
2249
2250 /**
2251 * brcmf_p2p_del_vif() - delete a P2P virtual interface.
2252 *
2253 * @wiphy: wiphy device of interface.
2254 * @wdev: wireless device of interface.
2255 */
brcmf_p2p_del_vif(struct wiphy * wiphy,struct wireless_dev * wdev)2256 int brcmf_p2p_del_vif(struct wiphy *wiphy, struct wireless_dev *wdev)
2257 {
2258 struct brcmf_cfg80211_info *cfg = wiphy_priv(wiphy);
2259 struct brcmf_p2p_info *p2p = &cfg->p2p;
2260 struct brcmf_cfg80211_vif *vif;
2261 unsigned long jiffie_timeout = msecs_to_jiffies(1500);
2262 bool wait_for_disable = false;
2263 int err;
2264
2265 brcmf_dbg(TRACE, "delete P2P vif\n");
2266 vif = container_of(wdev, struct brcmf_cfg80211_vif, wdev);
2267
2268 brcmf_cfg80211_arm_vif_event(cfg, vif);
2269 switch (vif->wdev.iftype) {
2270 case NL80211_IFTYPE_P2P_CLIENT:
2271 if (test_bit(BRCMF_VIF_STATUS_DISCONNECTING, &vif->sme_state))
2272 wait_for_disable = true;
2273 break;
2274
2275 case NL80211_IFTYPE_P2P_GO:
2276 if (!brcmf_p2p_disable_p2p_if(vif))
2277 wait_for_disable = true;
2278 break;
2279
2280 case NL80211_IFTYPE_P2P_DEVICE:
2281 if (!p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif)
2282 return 0;
2283 brcmf_p2p_cancel_remain_on_channel(vif->ifp);
2284 brcmf_p2p_deinit_discovery(p2p);
2285 default:
2286 return -ENOTSUPP;
2287 }
2288
2289 clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status);
2290 brcmf_dbg(INFO, "P2P: GO_NEG_PHASE status cleared\n");
2291
2292 if (wait_for_disable)
2293 wait_for_completion_timeout(&cfg->vif_disabled,
2294 msecs_to_jiffies(500));
2295
2296 err = 0;
2297 if (vif->wdev.iftype != NL80211_IFTYPE_P2P_DEVICE) {
2298 brcmf_vif_clear_mgmt_ies(vif);
2299 err = brcmf_p2p_release_p2p_if(vif);
2300 }
2301 if (!err) {
2302 /* wait for firmware event */
2303 err = brcmf_cfg80211_wait_vif_event_timeout(cfg, BRCMF_E_IF_DEL,
2304 jiffie_timeout);
2305 if (!err)
2306 err = -EIO;
2307 else
2308 err = 0;
2309 }
2310 if (err)
2311 brcmf_remove_interface(vif->ifp);
2312
2313 brcmf_cfg80211_arm_vif_event(cfg, NULL);
2314 if (vif->wdev.iftype != NL80211_IFTYPE_P2P_DEVICE)
2315 p2p->bss_idx[P2PAPI_BSSCFG_CONNECTION].vif = NULL;
2316
2317 return err;
2318 }
2319
brcmf_p2p_ifp_removed(struct brcmf_if * ifp)2320 void brcmf_p2p_ifp_removed(struct brcmf_if *ifp)
2321 {
2322 struct brcmf_cfg80211_info *cfg;
2323 struct brcmf_cfg80211_vif *vif;
2324
2325 brcmf_dbg(INFO, "P2P: device interface removed\n");
2326 vif = ifp->vif;
2327 cfg = wdev_to_cfg(&vif->wdev);
2328 cfg->p2p.bss_idx[P2PAPI_BSSCFG_DEVICE].vif = NULL;
2329 rtnl_lock();
2330 cfg80211_unregister_wdev(&vif->wdev);
2331 rtnl_unlock();
2332 brcmf_free_vif(vif);
2333 }
2334
brcmf_p2p_start_device(struct wiphy * wiphy,struct wireless_dev * wdev)2335 int brcmf_p2p_start_device(struct wiphy *wiphy, struct wireless_dev *wdev)
2336 {
2337 struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
2338 struct brcmf_p2p_info *p2p = &cfg->p2p;
2339 struct brcmf_cfg80211_vif *vif;
2340 int err;
2341
2342 vif = container_of(wdev, struct brcmf_cfg80211_vif, wdev);
2343 mutex_lock(&cfg->usr_sync);
2344 err = brcmf_p2p_enable_discovery(p2p);
2345 if (!err)
2346 set_bit(BRCMF_VIF_STATUS_READY, &vif->sme_state);
2347 mutex_unlock(&cfg->usr_sync);
2348 return err;
2349 }
2350
brcmf_p2p_stop_device(struct wiphy * wiphy,struct wireless_dev * wdev)2351 void brcmf_p2p_stop_device(struct wiphy *wiphy, struct wireless_dev *wdev)
2352 {
2353 struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
2354 struct brcmf_p2p_info *p2p = &cfg->p2p;
2355 struct brcmf_cfg80211_vif *vif;
2356
2357 vif = container_of(wdev, struct brcmf_cfg80211_vif, wdev);
2358 /* This call can be result of the unregister_wdev call. In that case
2359 * we dont want to do anything anymore. Just return. The config vif
2360 * will have been cleared at this point.
2361 */
2362 if (p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif == vif) {
2363 mutex_lock(&cfg->usr_sync);
2364 /* Set the discovery state to SCAN */
2365 (void)brcmf_p2p_set_discover_state(vif->ifp,
2366 WL_P2P_DISC_ST_SCAN, 0, 0);
2367 brcmf_abort_scanning(cfg);
2368 clear_bit(BRCMF_VIF_STATUS_READY, &vif->sme_state);
2369 mutex_unlock(&cfg->usr_sync);
2370 }
2371 }
2372
2373 /**
2374 * brcmf_p2p_attach() - attach for P2P.
2375 *
2376 * @cfg: driver private data for cfg80211 interface.
2377 * @p2pdev_forced: create p2p device interface at attach.
2378 */
brcmf_p2p_attach(struct brcmf_cfg80211_info * cfg,bool p2pdev_forced)2379 s32 brcmf_p2p_attach(struct brcmf_cfg80211_info *cfg, bool p2pdev_forced)
2380 {
2381 struct brcmf_p2p_info *p2p;
2382 struct brcmf_if *pri_ifp;
2383 s32 err = 0;
2384 void *err_ptr;
2385
2386 p2p = &cfg->p2p;
2387 p2p->cfg = cfg;
2388
2389 pri_ifp = brcmf_get_ifp(cfg->pub, 0);
2390 p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif = pri_ifp->vif;
2391
2392 if (p2pdev_forced) {
2393 err_ptr = brcmf_p2p_create_p2pdev(p2p, NULL, NULL);
2394 if (IS_ERR(err_ptr)) {
2395 brcmf_err("P2P device creation failed.\n");
2396 err = PTR_ERR(err_ptr);
2397 }
2398 } else {
2399 p2p->p2pdev_dynamically = true;
2400 }
2401 return err;
2402 }
2403
2404 /**
2405 * brcmf_p2p_detach() - detach P2P.
2406 *
2407 * @p2p: P2P specific data.
2408 */
brcmf_p2p_detach(struct brcmf_p2p_info * p2p)2409 void brcmf_p2p_detach(struct brcmf_p2p_info *p2p)
2410 {
2411 struct brcmf_cfg80211_vif *vif;
2412
2413 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif;
2414 if (vif != NULL) {
2415 brcmf_p2p_cancel_remain_on_channel(vif->ifp);
2416 brcmf_p2p_deinit_discovery(p2p);
2417 brcmf_remove_interface(vif->ifp);
2418 }
2419 /* just set it all to zero */
2420 memset(p2p, 0, sizeof(*p2p));
2421 }
2422
2423