1 // SPDX-License-Identifier: ISC
2 /*
3 * Copyright (c) 2012 Broadcom Corporation
4 */
5 #include <linux/slab.h>
6 #include <linux/netdevice.h>
7 #include <linux/etherdevice.h>
8 #include <linux/rtnetlink.h>
9 #include <net/cfg80211.h>
10 #if defined(__FreeBSD__)
11 #include <linux/delay.h>
12 #endif
13
14 #include <brcmu_wifi.h>
15 #include <brcmu_utils.h>
16 #include <defs.h>
17 #include "core.h"
18 #include "debug.h"
19 #include "fwil.h"
20 #include "fwil_types.h"
21 #include "p2p.h"
22 #include "cfg80211.h"
23 #include "feature.h"
24
25 /* parameters used for p2p escan */
26 #define P2PAPI_SCAN_NPROBES 1
27 #define P2PAPI_SCAN_DWELL_TIME_MS 80
28 #define P2PAPI_SCAN_SOCIAL_DWELL_TIME_MS 40
29 #define P2PAPI_SCAN_HOME_TIME_MS 60
30 #define P2PAPI_SCAN_NPROBS_TIME_MS 30
31 #define P2PAPI_SCAN_AF_SEARCH_DWELL_TIME_MS 100
32 #define WL_SCAN_CONNECT_DWELL_TIME_MS 200
33 #define WL_SCAN_JOIN_PROBE_INTERVAL_MS 20
34
35 #define BRCMF_P2P_WILDCARD_SSID "DIRECT-"
36 #define BRCMF_P2P_WILDCARD_SSID_LEN (sizeof(BRCMF_P2P_WILDCARD_SSID) - 1)
37
38 #define SOCIAL_CHAN_1 1
39 #define SOCIAL_CHAN_2 6
40 #define SOCIAL_CHAN_3 11
41 #define IS_P2P_SOCIAL_CHANNEL(channel) ((channel == SOCIAL_CHAN_1) || \
42 (channel == SOCIAL_CHAN_2) || \
43 (channel == SOCIAL_CHAN_3))
44 #define BRCMF_P2P_TEMP_CHAN SOCIAL_CHAN_3
45 #define SOCIAL_CHAN_CNT 3
46 #define AF_PEER_SEARCH_CNT 2
47
48 #define BRCMF_SCB_TIMEOUT_VALUE 20
49
50 #define P2P_VER 9 /* P2P version: 9=WiFi P2P v1.0 */
51 #define P2P_PUB_AF_CATEGORY 0x04
52 #define P2P_PUB_AF_ACTION 0x09
53 #define P2P_AF_CATEGORY 0x7f
54 #define P2P_OUI "\x50\x6F\x9A" /* P2P OUI */
55 #define P2P_OUI_LEN 3 /* P2P OUI length */
56
57 /* Action Frame Constants */
58 #define DOT11_ACTION_HDR_LEN 2 /* action frame category + action */
59 #define DOT11_ACTION_CAT_OFF 0 /* category offset */
60 #define DOT11_ACTION_ACT_OFF 1 /* action offset */
61
62 #define P2P_AF_DWELL_TIME 200
63 #define P2P_AF_MIN_DWELL_TIME 100
64 #define P2P_AF_MED_DWELL_TIME 400
65 #define P2P_AF_LONG_DWELL_TIME 1000
66 #define P2P_AF_TX_MAX_RETRY 5
67 #define P2P_AF_MAX_WAIT_TIME msecs_to_jiffies(2000)
68 #define P2P_INVALID_CHANNEL -1
69 #define P2P_CHANNEL_SYNC_RETRY 5
70 #define P2P_AF_FRM_SCAN_MAX_WAIT msecs_to_jiffies(450)
71 #define P2P_DEFAULT_SLEEP_TIME_VSDB 200
72 #define P2P_AF_RETRY_DELAY_TIME 40
73
74 /* WiFi P2P Public Action Frame OUI Subtypes */
75 #define P2P_PAF_GON_REQ 0 /* Group Owner Negotiation Req */
76 #define P2P_PAF_GON_RSP 1 /* Group Owner Negotiation Rsp */
77 #define P2P_PAF_GON_CONF 2 /* Group Owner Negotiation Confirm */
78 #define P2P_PAF_INVITE_REQ 3 /* P2P Invitation Request */
79 #define P2P_PAF_INVITE_RSP 4 /* P2P Invitation Response */
80 #define P2P_PAF_DEVDIS_REQ 5 /* Device Discoverability Request */
81 #define P2P_PAF_DEVDIS_RSP 6 /* Device Discoverability Response */
82 #define P2P_PAF_PROVDIS_REQ 7 /* Provision Discovery Request */
83 #define P2P_PAF_PROVDIS_RSP 8 /* Provision Discovery Response */
84 #define P2P_PAF_SUBTYPE_INVALID 255 /* Invalid Subtype */
85
86 /* WiFi P2P Action Frame OUI Subtypes */
87 #define P2P_AF_NOTICE_OF_ABSENCE 0 /* Notice of Absence */
88 #define P2P_AF_PRESENCE_REQ 1 /* P2P Presence Request */
89 #define P2P_AF_PRESENCE_RSP 2 /* P2P Presence Response */
90 #define P2P_AF_GO_DISC_REQ 3 /* GO Discoverability Request */
91
92 /* P2P Service Discovery related */
93 #define P2PSD_ACTION_CATEGORY 0x04 /* Public action frame */
94 #define P2PSD_ACTION_ID_GAS_IREQ 0x0a /* GAS Initial Request AF */
95 #define P2PSD_ACTION_ID_GAS_IRESP 0x0b /* GAS Initial Response AF */
96 #define P2PSD_ACTION_ID_GAS_CREQ 0x0c /* GAS Comeback Request AF */
97 #define P2PSD_ACTION_ID_GAS_CRESP 0x0d /* GAS Comeback Response AF */
98
99 #define BRCMF_P2P_DISABLE_TIMEOUT msecs_to_jiffies(500)
100
101 /* Mask for retry counter of custom dwell time */
102 #define CUSTOM_RETRY_MASK 0xff000000
103 /**
104 * struct brcmf_p2p_disc_st_le - set discovery state in firmware.
105 *
106 * @state: requested discovery state (see enum brcmf_p2p_disc_state).
107 * @chspec: channel parameter for %WL_P2P_DISC_ST_LISTEN state.
108 * @dwell: dwell time in ms for %WL_P2P_DISC_ST_LISTEN state.
109 */
110 struct brcmf_p2p_disc_st_le {
111 u8 state;
112 __le16 chspec;
113 __le16 dwell;
114 };
115
116 /**
117 * enum brcmf_p2p_disc_state - P2P discovery state values
118 *
119 * @WL_P2P_DISC_ST_SCAN: P2P discovery with wildcard SSID and P2P IE.
120 * @WL_P2P_DISC_ST_LISTEN: P2P discovery off-channel for specified time.
121 * @WL_P2P_DISC_ST_SEARCH: P2P discovery with P2P wildcard SSID and P2P IE.
122 */
123 enum brcmf_p2p_disc_state {
124 WL_P2P_DISC_ST_SCAN,
125 WL_P2P_DISC_ST_LISTEN,
126 WL_P2P_DISC_ST_SEARCH
127 };
128
129 /**
130 * struct brcmf_p2p_scan_le - P2P specific scan request.
131 *
132 * @type: type of scan method requested (values: 'E' or 'S').
133 * @reserved: reserved (ignored).
134 * @eparams: parameters used for type 'E'.
135 * @sparams: parameters used for type 'S'.
136 */
137 struct brcmf_p2p_scan_le {
138 u8 type;
139 u8 reserved[3];
140 union {
141 struct brcmf_escan_params_le eparams;
142 struct brcmf_scan_params_le sparams;
143 };
144 };
145
146 /**
147 * struct brcmf_p2p_pub_act_frame - WiFi P2P Public Action Frame
148 *
149 * @category: P2P_PUB_AF_CATEGORY
150 * @action: P2P_PUB_AF_ACTION
151 * @oui: P2P_OUI
152 * @oui_type: OUI type - P2P_VER
153 * @subtype: OUI subtype - P2P_TYPE_*
154 * @dialog_token: nonzero, identifies req/rsp transaction
155 * @elts: Variable length information elements.
156 */
157 struct brcmf_p2p_pub_act_frame {
158 u8 category;
159 u8 action;
160 u8 oui[3];
161 u8 oui_type;
162 u8 subtype;
163 u8 dialog_token;
164 u8 elts[];
165 };
166
167 /**
168 * struct brcmf_p2p_action_frame - WiFi P2P Action Frame
169 *
170 * @category: P2P_AF_CATEGORY
171 * @oui: OUI - P2P_OUI
172 * @type: OUI Type - P2P_VER
173 * @subtype: OUI Subtype - P2P_AF_*
174 * @dialog_token: nonzero, identifies req/resp tranaction
175 * @elts: Variable length information elements.
176 */
177 struct brcmf_p2p_action_frame {
178 u8 category;
179 u8 oui[3];
180 u8 type;
181 u8 subtype;
182 u8 dialog_token;
183 u8 elts[];
184 };
185
186 /**
187 * struct brcmf_p2psd_gas_pub_act_frame - Wi-Fi GAS Public Action Frame
188 *
189 * @category: 0x04 Public Action Frame
190 * @action: 0x6c Advertisement Protocol
191 * @dialog_token: nonzero, identifies req/rsp transaction
192 * @query_data: Query Data. SD gas ireq SD gas iresp
193 */
194 struct brcmf_p2psd_gas_pub_act_frame {
195 u8 category;
196 u8 action;
197 u8 dialog_token;
198 u8 query_data[];
199 };
200
201 /**
202 * struct brcmf_config_af_params - Action Frame Parameters for tx.
203 *
204 * @mpc_onoff: To make sure to send successfully action frame, we have to
205 * turn off mpc 0: off, 1: on, (-1): do nothing
206 * @search_channel: 1: search peer's channel to send af
207 * @extra_listen: keep the dwell time to get af response frame.
208 */
209 struct brcmf_config_af_params {
210 s32 mpc_onoff;
211 bool search_channel;
212 bool extra_listen;
213 };
214
215 /**
216 * brcmf_p2p_is_pub_action() - true if p2p public type frame.
217 *
218 * @frame: action frame data.
219 * @frame_len: length of action frame data.
220 *
221 * Determine if action frame is p2p public action type
222 */
brcmf_p2p_is_pub_action(void * frame,u32 frame_len)223 static bool brcmf_p2p_is_pub_action(void *frame, u32 frame_len)
224 {
225 struct brcmf_p2p_pub_act_frame *pact_frm;
226
227 if (frame == NULL)
228 return false;
229
230 pact_frm = (struct brcmf_p2p_pub_act_frame *)frame;
231 if (frame_len < sizeof(*pact_frm))
232 return false;
233
234 if (pact_frm->category == P2P_PUB_AF_CATEGORY &&
235 pact_frm->action == P2P_PUB_AF_ACTION &&
236 pact_frm->oui_type == P2P_VER &&
237 memcmp(pact_frm->oui, P2P_OUI, P2P_OUI_LEN) == 0)
238 return true;
239
240 return false;
241 }
242
243 /**
244 * brcmf_p2p_is_p2p_action() - true if p2p action type frame.
245 *
246 * @frame: action frame data.
247 * @frame_len: length of action frame data.
248 *
249 * Determine if action frame is p2p action type
250 */
brcmf_p2p_is_p2p_action(void * frame,u32 frame_len)251 static bool brcmf_p2p_is_p2p_action(void *frame, u32 frame_len)
252 {
253 struct brcmf_p2p_action_frame *act_frm;
254
255 if (frame == NULL)
256 return false;
257
258 act_frm = (struct brcmf_p2p_action_frame *)frame;
259 if (frame_len < sizeof(*act_frm))
260 return false;
261
262 if (act_frm->category == P2P_AF_CATEGORY &&
263 act_frm->type == P2P_VER &&
264 memcmp(act_frm->oui, P2P_OUI, P2P_OUI_LEN) == 0)
265 return true;
266
267 return false;
268 }
269
270 /**
271 * brcmf_p2p_is_gas_action() - true if p2p gas action type frame.
272 *
273 * @frame: action frame data.
274 * @frame_len: length of action frame data.
275 *
276 * Determine if action frame is p2p gas action type
277 */
brcmf_p2p_is_gas_action(void * frame,u32 frame_len)278 static bool brcmf_p2p_is_gas_action(void *frame, u32 frame_len)
279 {
280 struct brcmf_p2psd_gas_pub_act_frame *sd_act_frm;
281
282 if (frame == NULL)
283 return false;
284
285 sd_act_frm = (struct brcmf_p2psd_gas_pub_act_frame *)frame;
286 if (frame_len < sizeof(*sd_act_frm))
287 return false;
288
289 if (sd_act_frm->category != P2PSD_ACTION_CATEGORY)
290 return false;
291
292 if (sd_act_frm->action == P2PSD_ACTION_ID_GAS_IREQ ||
293 sd_act_frm->action == P2PSD_ACTION_ID_GAS_IRESP ||
294 sd_act_frm->action == P2PSD_ACTION_ID_GAS_CREQ ||
295 sd_act_frm->action == P2PSD_ACTION_ID_GAS_CRESP)
296 return true;
297
298 return false;
299 }
300
301 /**
302 * brcmf_p2p_print_actframe() - debug print routine.
303 *
304 * @tx: Received or to be transmitted
305 * @frame: action frame data.
306 * @frame_len: length of action frame data.
307 *
308 * Print information about the p2p action frame
309 */
310
311 #ifdef DEBUG
312
brcmf_p2p_print_actframe(bool tx,void * frame,u32 frame_len)313 static void brcmf_p2p_print_actframe(bool tx, void *frame, u32 frame_len)
314 {
315 struct brcmf_p2p_pub_act_frame *pact_frm;
316 struct brcmf_p2p_action_frame *act_frm;
317 struct brcmf_p2psd_gas_pub_act_frame *sd_act_frm;
318
319 if (!frame || frame_len <= 2)
320 return;
321
322 if (brcmf_p2p_is_pub_action(frame, frame_len)) {
323 pact_frm = (struct brcmf_p2p_pub_act_frame *)frame;
324 switch (pact_frm->subtype) {
325 case P2P_PAF_GON_REQ:
326 brcmf_dbg(TRACE, "%s P2P Group Owner Negotiation Req Frame\n",
327 (tx) ? "TX" : "RX");
328 break;
329 case P2P_PAF_GON_RSP:
330 brcmf_dbg(TRACE, "%s P2P Group Owner Negotiation Rsp Frame\n",
331 (tx) ? "TX" : "RX");
332 break;
333 case P2P_PAF_GON_CONF:
334 brcmf_dbg(TRACE, "%s P2P Group Owner Negotiation Confirm Frame\n",
335 (tx) ? "TX" : "RX");
336 break;
337 case P2P_PAF_INVITE_REQ:
338 brcmf_dbg(TRACE, "%s P2P Invitation Request Frame\n",
339 (tx) ? "TX" : "RX");
340 break;
341 case P2P_PAF_INVITE_RSP:
342 brcmf_dbg(TRACE, "%s P2P Invitation Response Frame\n",
343 (tx) ? "TX" : "RX");
344 break;
345 case P2P_PAF_DEVDIS_REQ:
346 brcmf_dbg(TRACE, "%s P2P Device Discoverability Request Frame\n",
347 (tx) ? "TX" : "RX");
348 break;
349 case P2P_PAF_DEVDIS_RSP:
350 brcmf_dbg(TRACE, "%s P2P Device Discoverability Response Frame\n",
351 (tx) ? "TX" : "RX");
352 break;
353 case P2P_PAF_PROVDIS_REQ:
354 brcmf_dbg(TRACE, "%s P2P Provision Discovery Request Frame\n",
355 (tx) ? "TX" : "RX");
356 break;
357 case P2P_PAF_PROVDIS_RSP:
358 brcmf_dbg(TRACE, "%s P2P Provision Discovery Response Frame\n",
359 (tx) ? "TX" : "RX");
360 break;
361 default:
362 brcmf_dbg(TRACE, "%s Unknown P2P Public Action Frame\n",
363 (tx) ? "TX" : "RX");
364 break;
365 }
366 } else if (brcmf_p2p_is_p2p_action(frame, frame_len)) {
367 act_frm = (struct brcmf_p2p_action_frame *)frame;
368 switch (act_frm->subtype) {
369 case P2P_AF_NOTICE_OF_ABSENCE:
370 brcmf_dbg(TRACE, "%s P2P Notice of Absence Frame\n",
371 (tx) ? "TX" : "RX");
372 break;
373 case P2P_AF_PRESENCE_REQ:
374 brcmf_dbg(TRACE, "%s P2P Presence Request Frame\n",
375 (tx) ? "TX" : "RX");
376 break;
377 case P2P_AF_PRESENCE_RSP:
378 brcmf_dbg(TRACE, "%s P2P Presence Response Frame\n",
379 (tx) ? "TX" : "RX");
380 break;
381 case P2P_AF_GO_DISC_REQ:
382 brcmf_dbg(TRACE, "%s P2P Discoverability Request Frame\n",
383 (tx) ? "TX" : "RX");
384 break;
385 default:
386 brcmf_dbg(TRACE, "%s Unknown P2P Action Frame\n",
387 (tx) ? "TX" : "RX");
388 }
389
390 } else if (brcmf_p2p_is_gas_action(frame, frame_len)) {
391 sd_act_frm = (struct brcmf_p2psd_gas_pub_act_frame *)frame;
392 switch (sd_act_frm->action) {
393 case P2PSD_ACTION_ID_GAS_IREQ:
394 brcmf_dbg(TRACE, "%s P2P GAS Initial Request\n",
395 (tx) ? "TX" : "RX");
396 break;
397 case P2PSD_ACTION_ID_GAS_IRESP:
398 brcmf_dbg(TRACE, "%s P2P GAS Initial Response\n",
399 (tx) ? "TX" : "RX");
400 break;
401 case P2PSD_ACTION_ID_GAS_CREQ:
402 brcmf_dbg(TRACE, "%s P2P GAS Comeback Request\n",
403 (tx) ? "TX" : "RX");
404 break;
405 case P2PSD_ACTION_ID_GAS_CRESP:
406 brcmf_dbg(TRACE, "%s P2P GAS Comeback Response\n",
407 (tx) ? "TX" : "RX");
408 break;
409 default:
410 brcmf_dbg(TRACE, "%s Unknown P2P GAS Frame\n",
411 (tx) ? "TX" : "RX");
412 break;
413 }
414 }
415 }
416
417 #else
418
brcmf_p2p_print_actframe(bool tx,void * frame,u32 frame_len)419 static void brcmf_p2p_print_actframe(bool tx, void *frame, u32 frame_len)
420 {
421 }
422
423 #endif
424
425
426 /**
427 * brcmf_p2p_set_firmware() - prepare firmware for peer-to-peer operation.
428 *
429 * @ifp: ifp to use for iovars (primary).
430 * @p2p_mac: mac address to configure for p2p_da_override
431 */
brcmf_p2p_set_firmware(struct brcmf_if * ifp,u8 * p2p_mac)432 static int brcmf_p2p_set_firmware(struct brcmf_if *ifp, u8 *p2p_mac)
433 {
434 struct brcmf_pub *drvr = ifp->drvr;
435 s32 ret = 0;
436
437 brcmf_fil_cmd_int_set(ifp, BRCMF_C_DOWN, 1);
438 brcmf_fil_iovar_int_set(ifp, "apsta", 1);
439 brcmf_fil_cmd_int_set(ifp, BRCMF_C_UP, 1);
440
441 /* In case of COB type, firmware has default mac address
442 * After Initializing firmware, we have to set current mac address to
443 * firmware for P2P device address. This must be done with discovery
444 * disabled.
445 */
446 brcmf_fil_iovar_int_set(ifp, "p2p_disc", 0);
447
448 ret = brcmf_fil_iovar_data_set(ifp, "p2p_da_override", p2p_mac,
449 ETH_ALEN);
450 if (ret)
451 bphy_err(drvr, "failed to update device address ret %d\n", ret);
452
453 return ret;
454 }
455
456 /**
457 * brcmf_p2p_generate_bss_mac() - derive mac addresses for P2P.
458 *
459 * @p2p: P2P specific data.
460 * @dev_addr: optional device address.
461 *
462 * P2P needs mac addresses for P2P device and interface. If no device
463 * address it specified, these are derived from a random ethernet
464 * address.
465 */
brcmf_p2p_generate_bss_mac(struct brcmf_p2p_info * p2p,u8 * dev_addr)466 static void brcmf_p2p_generate_bss_mac(struct brcmf_p2p_info *p2p, u8 *dev_addr)
467 {
468 struct brcmf_if *pri_ifp = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->ifp;
469 bool random_addr = false;
470 bool local_admin = false;
471
472 if (!dev_addr || is_zero_ether_addr(dev_addr)) {
473 /* If the primary interface address is already locally
474 * administered, create a new random address.
475 */
476 if (pri_ifp->mac_addr[0] & 0x02) {
477 random_addr = true;
478 } else {
479 dev_addr = pri_ifp->mac_addr;
480 local_admin = true;
481 }
482 }
483
484 /* Generate the P2P Device Address obtaining a random ethernet
485 * address with the locally administered bit set.
486 */
487 if (random_addr)
488 eth_random_addr(p2p->dev_addr);
489 else
490 memcpy(p2p->dev_addr, dev_addr, ETH_ALEN);
491
492 if (local_admin)
493 p2p->dev_addr[0] |= 0x02;
494
495 /* Generate the P2P Interface Address. If the discovery and connection
496 * BSSCFGs need to simultaneously co-exist, then this address must be
497 * different from the P2P Device Address, but also locally administered.
498 */
499 memcpy(p2p->conn_int_addr, p2p->dev_addr, ETH_ALEN);
500 p2p->conn_int_addr[0] |= 0x02;
501 p2p->conn_int_addr[4] ^= 0x80;
502
503 memcpy(p2p->conn2_int_addr, p2p->dev_addr, ETH_ALEN);
504 p2p->conn2_int_addr[0] |= 0x02;
505 p2p->conn2_int_addr[4] ^= 0x90;
506 }
507
508 /**
509 * brcmf_p2p_scan_is_p2p_request() - is cfg80211 scan request a P2P scan.
510 *
511 * @request: the scan request as received from cfg80211.
512 *
513 * returns true if one of the ssids in the request matches the
514 * P2P wildcard ssid; otherwise returns false.
515 */
brcmf_p2p_scan_is_p2p_request(struct cfg80211_scan_request * request)516 static bool brcmf_p2p_scan_is_p2p_request(struct cfg80211_scan_request *request)
517 {
518 struct cfg80211_ssid *ssids = request->ssids;
519 int i;
520
521 for (i = 0; i < request->n_ssids; i++) {
522 if (ssids[i].ssid_len != BRCMF_P2P_WILDCARD_SSID_LEN)
523 continue;
524
525 brcmf_dbg(INFO, "comparing ssid \"%s\"", ssids[i].ssid);
526 if (!memcmp(BRCMF_P2P_WILDCARD_SSID, ssids[i].ssid,
527 BRCMF_P2P_WILDCARD_SSID_LEN))
528 return true;
529 }
530 return false;
531 }
532
533 /**
534 * brcmf_p2p_set_discover_state - set discover state in firmware.
535 *
536 * @ifp: low-level interface object.
537 * @state: discover state to set.
538 * @chanspec: channel parameters (for state @WL_P2P_DISC_ST_LISTEN only).
539 * @listen_ms: duration to listen (for state @WL_P2P_DISC_ST_LISTEN only).
540 */
brcmf_p2p_set_discover_state(struct brcmf_if * ifp,u8 state,u16 chanspec,u16 listen_ms)541 static s32 brcmf_p2p_set_discover_state(struct brcmf_if *ifp, u8 state,
542 u16 chanspec, u16 listen_ms)
543 {
544 struct brcmf_p2p_disc_st_le discover_state;
545 s32 ret = 0;
546 brcmf_dbg(TRACE, "enter\n");
547
548 discover_state.state = state;
549 discover_state.chspec = cpu_to_le16(chanspec);
550 discover_state.dwell = cpu_to_le16(listen_ms);
551 ret = brcmf_fil_bsscfg_data_set(ifp, "p2p_state", &discover_state,
552 sizeof(discover_state));
553 return ret;
554 }
555
556 /**
557 * brcmf_p2p_deinit_discovery() - disable P2P device discovery.
558 *
559 * @p2p: P2P specific data.
560 *
561 * Resets the discovery state and disables it in firmware.
562 */
brcmf_p2p_deinit_discovery(struct brcmf_p2p_info * p2p)563 static s32 brcmf_p2p_deinit_discovery(struct brcmf_p2p_info *p2p)
564 {
565 struct brcmf_cfg80211_vif *vif;
566
567 brcmf_dbg(TRACE, "enter\n");
568
569 /* Set the discovery state to SCAN */
570 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif;
571 (void)brcmf_p2p_set_discover_state(vif->ifp, WL_P2P_DISC_ST_SCAN, 0, 0);
572
573 /* Disable P2P discovery in the firmware */
574 vif = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif;
575 (void)brcmf_fil_iovar_int_set(vif->ifp, "p2p_disc", 0);
576
577 return 0;
578 }
579
580 /**
581 * brcmf_p2p_enable_discovery() - initialize and configure discovery.
582 *
583 * @p2p: P2P specific data.
584 *
585 * Initializes the discovery device and configure the virtual interface.
586 */
brcmf_p2p_enable_discovery(struct brcmf_p2p_info * p2p)587 static int brcmf_p2p_enable_discovery(struct brcmf_p2p_info *p2p)
588 {
589 struct brcmf_pub *drvr = p2p->cfg->pub;
590 struct brcmf_cfg80211_vif *vif;
591 s32 ret = 0;
592
593 brcmf_dbg(TRACE, "enter\n");
594 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif;
595 if (!vif) {
596 bphy_err(drvr, "P2P config device not available\n");
597 ret = -EPERM;
598 goto exit;
599 }
600
601 if (test_bit(BRCMF_P2P_STATUS_ENABLED, &p2p->status)) {
602 brcmf_dbg(INFO, "P2P config device already configured\n");
603 goto exit;
604 }
605
606 /* Re-initialize P2P Discovery in the firmware */
607 vif = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif;
608 ret = brcmf_fil_iovar_int_set(vif->ifp, "p2p_disc", 1);
609 if (ret < 0) {
610 bphy_err(drvr, "set p2p_disc error\n");
611 goto exit;
612 }
613 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif;
614 ret = brcmf_p2p_set_discover_state(vif->ifp, WL_P2P_DISC_ST_SCAN, 0, 0);
615 if (ret < 0) {
616 bphy_err(drvr, "unable to set WL_P2P_DISC_ST_SCAN\n");
617 goto exit;
618 }
619
620 /*
621 * Set wsec to any non-zero value in the discovery bsscfg
622 * to ensure our P2P probe responses have the privacy bit
623 * set in the 802.11 WPA IE. Some peer devices may not
624 * initiate WPS with us if this bit is not set.
625 */
626 ret = brcmf_fil_bsscfg_int_set(vif->ifp, "wsec", AES_ENABLED);
627 if (ret < 0) {
628 bphy_err(drvr, "wsec error %d\n", ret);
629 goto exit;
630 }
631
632 set_bit(BRCMF_P2P_STATUS_ENABLED, &p2p->status);
633 exit:
634 return ret;
635 }
636
637 /**
638 * brcmf_p2p_escan() - initiate a P2P scan.
639 *
640 * @p2p: P2P specific data.
641 * @num_chans: number of channels to scan.
642 * @chanspecs: channel parameters for @num_chans channels.
643 * @search_state: P2P discover state to use.
644 * @bss_type: type of P2P bss.
645 */
brcmf_p2p_escan(struct brcmf_p2p_info * p2p,u32 num_chans,u16 chanspecs[],s32 search_state,enum p2p_bss_type bss_type)646 static s32 brcmf_p2p_escan(struct brcmf_p2p_info *p2p, u32 num_chans,
647 u16 chanspecs[], s32 search_state,
648 enum p2p_bss_type bss_type)
649 {
650 struct brcmf_pub *drvr = p2p->cfg->pub;
651 s32 ret = 0;
652 s32 memsize = offsetof(struct brcmf_p2p_scan_le,
653 eparams.params_le.channel_list);
654 s32 nprobes;
655 s32 active;
656 u32 i;
657 u8 *memblk;
658 struct brcmf_cfg80211_vif *vif;
659 struct brcmf_p2p_scan_le *p2p_params;
660 struct brcmf_scan_params_le *sparams;
661
662 memsize += num_chans * sizeof(__le16);
663 memblk = kzalloc(memsize, GFP_KERNEL);
664 if (!memblk)
665 return -ENOMEM;
666
667 vif = p2p->bss_idx[bss_type].vif;
668 if (vif == NULL) {
669 bphy_err(drvr, "no vif for bss type %d\n", bss_type);
670 ret = -EINVAL;
671 goto exit;
672 }
673 p2p_params = (struct brcmf_p2p_scan_le *)memblk;
674 sparams = &p2p_params->eparams.params_le;
675
676 switch (search_state) {
677 case WL_P2P_DISC_ST_SEARCH:
678 /*
679 * If we in SEARCH STATE, we don't need to set SSID explictly
680 * because dongle use P2P WILDCARD internally by default, use
681 * null ssid, which it is already due to kzalloc.
682 */
683 break;
684 case WL_P2P_DISC_ST_SCAN:
685 /*
686 * wpa_supplicant has p2p_find command with type social or
687 * progressive. For progressive, we need to set the ssid to
688 * P2P WILDCARD because we just do broadcast scan unless
689 * setting SSID.
690 */
691 sparams->ssid_le.SSID_len =
692 cpu_to_le32(BRCMF_P2P_WILDCARD_SSID_LEN);
693 memcpy(sparams->ssid_le.SSID, BRCMF_P2P_WILDCARD_SSID,
694 BRCMF_P2P_WILDCARD_SSID_LEN);
695 break;
696 default:
697 bphy_err(drvr, " invalid search state %d\n", search_state);
698 ret = -EINVAL;
699 goto exit;
700 }
701
702 brcmf_p2p_set_discover_state(vif->ifp, search_state, 0, 0);
703
704 /*
705 * set p2p scan parameters.
706 */
707 p2p_params->type = 'E';
708
709 /* determine the scan engine parameters */
710 sparams->bss_type = DOT11_BSSTYPE_ANY;
711 sparams->scan_type = BRCMF_SCANTYPE_ACTIVE;
712
713 eth_broadcast_addr(sparams->bssid);
714 sparams->home_time = cpu_to_le32(P2PAPI_SCAN_HOME_TIME_MS);
715
716 /*
717 * SOCIAL_CHAN_CNT + 1 takes care of the Progressive scan
718 * supported by the supplicant.
719 */
720 if (num_chans == SOCIAL_CHAN_CNT || num_chans == (SOCIAL_CHAN_CNT + 1))
721 active = P2PAPI_SCAN_SOCIAL_DWELL_TIME_MS;
722 else if (num_chans == AF_PEER_SEARCH_CNT)
723 active = P2PAPI_SCAN_AF_SEARCH_DWELL_TIME_MS;
724 else if (brcmf_get_vif_state_any(p2p->cfg, BRCMF_VIF_STATUS_CONNECTED))
725 active = -1;
726 else
727 active = P2PAPI_SCAN_DWELL_TIME_MS;
728
729 /* Override scan params to find a peer for a connection */
730 if (num_chans == 1) {
731 active = WL_SCAN_CONNECT_DWELL_TIME_MS;
732 /* WAR to sync with presence period of VSDB GO.
733 * send probe request more frequently
734 */
735 nprobes = active / WL_SCAN_JOIN_PROBE_INTERVAL_MS;
736 } else {
737 nprobes = active / P2PAPI_SCAN_NPROBS_TIME_MS;
738 }
739
740 if (nprobes <= 0)
741 nprobes = 1;
742
743 brcmf_dbg(INFO, "nprobes # %d, active_time %d\n", nprobes, active);
744 sparams->active_time = cpu_to_le32(active);
745 sparams->nprobes = cpu_to_le32(nprobes);
746 sparams->passive_time = cpu_to_le32(-1);
747 sparams->channel_num = cpu_to_le32(num_chans &
748 BRCMF_SCAN_PARAMS_COUNT_MASK);
749 for (i = 0; i < num_chans; i++)
750 sparams->channel_list[i] = cpu_to_le16(chanspecs[i]);
751
752 /* set the escan specific parameters */
753 p2p_params->eparams.version = cpu_to_le32(BRCMF_ESCAN_REQ_VERSION);
754 p2p_params->eparams.action = cpu_to_le16(WL_ESCAN_ACTION_START);
755 p2p_params->eparams.sync_id = cpu_to_le16(0x1234);
756 /* perform p2p scan on primary device */
757 ret = brcmf_fil_bsscfg_data_set(vif->ifp, "p2p_scan", memblk, memsize);
758 if (!ret)
759 set_bit(BRCMF_SCAN_STATUS_BUSY, &p2p->cfg->scan_status);
760 exit:
761 kfree(memblk);
762 return ret;
763 }
764
765 /**
766 * brcmf_p2p_run_escan() - escan callback for peer-to-peer.
767 *
768 * @cfg: driver private data for cfg80211 interface.
769 * @ifp: interface control.
770 * @request: scan request from cfg80211.
771 *
772 * Determines the P2P discovery state based to scan request parameters and
773 * validates the channels in the request.
774 */
brcmf_p2p_run_escan(struct brcmf_cfg80211_info * cfg,struct brcmf_if * ifp,struct cfg80211_scan_request * request)775 static s32 brcmf_p2p_run_escan(struct brcmf_cfg80211_info *cfg,
776 struct brcmf_if *ifp,
777 struct cfg80211_scan_request *request)
778 {
779 struct brcmf_p2p_info *p2p = &cfg->p2p;
780 struct brcmf_pub *drvr = cfg->pub;
781 s32 err = 0;
782 s32 search_state = WL_P2P_DISC_ST_SCAN;
783 struct brcmf_cfg80211_vif *vif;
784 struct net_device *dev = NULL;
785 int i, num_nodfs = 0;
786 u16 *chanspecs;
787
788 brcmf_dbg(TRACE, "enter\n");
789
790 if (!request) {
791 err = -EINVAL;
792 goto exit;
793 }
794
795 if (request->n_channels) {
796 chanspecs = kcalloc(request->n_channels, sizeof(*chanspecs),
797 GFP_KERNEL);
798 if (!chanspecs) {
799 err = -ENOMEM;
800 goto exit;
801 }
802 vif = p2p->bss_idx[P2PAPI_BSSCFG_CONNECTION].vif;
803 if (vif)
804 dev = vif->wdev.netdev;
805 if (request->n_channels == 3 &&
806 request->channels[0]->hw_value == SOCIAL_CHAN_1 &&
807 request->channels[1]->hw_value == SOCIAL_CHAN_2 &&
808 request->channels[2]->hw_value == SOCIAL_CHAN_3) {
809 /* SOCIAL CHANNELS 1, 6, 11 */
810 search_state = WL_P2P_DISC_ST_SEARCH;
811 brcmf_dbg(INFO, "P2P SEARCH PHASE START\n");
812 } else if (dev != NULL &&
813 vif->wdev.iftype == NL80211_IFTYPE_P2P_GO) {
814 /* If you are already a GO, then do SEARCH only */
815 brcmf_dbg(INFO, "Already a GO. Do SEARCH Only\n");
816 search_state = WL_P2P_DISC_ST_SEARCH;
817 } else {
818 brcmf_dbg(INFO, "P2P SCAN STATE START\n");
819 }
820
821 /*
822 * no P2P scanning on passive or DFS channels.
823 */
824 for (i = 0; i < request->n_channels; i++) {
825 struct ieee80211_channel *chan = request->channels[i];
826
827 if (chan->flags & (IEEE80211_CHAN_RADAR |
828 IEEE80211_CHAN_NO_IR))
829 continue;
830
831 chanspecs[i] = channel_to_chanspec(&p2p->cfg->d11inf,
832 chan);
833 brcmf_dbg(INFO, "%d: chan=%d, channel spec=%x\n",
834 num_nodfs, chan->hw_value, chanspecs[i]);
835 num_nodfs++;
836 }
837 err = brcmf_p2p_escan(p2p, num_nodfs, chanspecs, search_state,
838 P2PAPI_BSSCFG_DEVICE);
839 kfree(chanspecs);
840 }
841 exit:
842 if (err)
843 bphy_err(drvr, "error (%d)\n", err);
844 return err;
845 }
846
847
848 /**
849 * brcmf_p2p_find_listen_channel() - find listen channel in ie string.
850 *
851 * @ie: string of information elements.
852 * @ie_len: length of string.
853 *
854 * Scan ie for p2p ie and look for attribute 6 channel. If available determine
855 * channel and return it.
856 */
brcmf_p2p_find_listen_channel(const u8 * ie,u32 ie_len)857 static s32 brcmf_p2p_find_listen_channel(const u8 *ie, u32 ie_len)
858 {
859 u8 channel_ie[5];
860 s32 listen_channel;
861 s32 err;
862
863 err = cfg80211_get_p2p_attr(ie, ie_len,
864 IEEE80211_P2P_ATTR_LISTEN_CHANNEL,
865 channel_ie, sizeof(channel_ie));
866 if (err < 0)
867 return err;
868
869 /* listen channel subel length format: */
870 /* 3(country) + 1(op. class) + 1(chan num) */
871 listen_channel = (s32)channel_ie[3 + 1];
872
873 if (listen_channel == SOCIAL_CHAN_1 ||
874 listen_channel == SOCIAL_CHAN_2 ||
875 listen_channel == SOCIAL_CHAN_3) {
876 brcmf_dbg(INFO, "Found my Listen Channel %d\n", listen_channel);
877 return listen_channel;
878 }
879
880 return -EPERM;
881 }
882
883
884 /**
885 * brcmf_p2p_scan_prep() - prepare scan based on request.
886 *
887 * @wiphy: wiphy device.
888 * @request: scan request from cfg80211.
889 * @vif: vif on which scan request is to be executed.
890 *
891 * Prepare the scan appropriately for type of scan requested. Overrides the
892 * escan .run() callback for peer-to-peer scanning.
893 */
brcmf_p2p_scan_prep(struct wiphy * wiphy,struct cfg80211_scan_request * request,struct brcmf_cfg80211_vif * vif)894 int brcmf_p2p_scan_prep(struct wiphy *wiphy,
895 struct cfg80211_scan_request *request,
896 struct brcmf_cfg80211_vif *vif)
897 {
898 struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
899 struct brcmf_p2p_info *p2p = &cfg->p2p;
900 int err;
901
902 if (brcmf_p2p_scan_is_p2p_request(request)) {
903 /* find my listen channel */
904 err = brcmf_p2p_find_listen_channel(request->ie,
905 request->ie_len);
906 if (err < 0)
907 return err;
908
909 p2p->afx_hdl.my_listen_chan = err;
910
911 clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status);
912 brcmf_dbg(INFO, "P2P: GO_NEG_PHASE status cleared\n");
913
914 err = brcmf_p2p_enable_discovery(p2p);
915 if (err)
916 return err;
917
918 /* override .run_escan() callback. */
919 cfg->escan_info.run = brcmf_p2p_run_escan;
920 }
921 return 0;
922 }
923
924
925 /**
926 * brcmf_p2p_discover_listen() - set firmware to discover listen state.
927 *
928 * @p2p: p2p device.
929 * @channel: channel nr for discover listen.
930 * @duration: time in ms to stay on channel.
931 *
932 */
933 static s32
brcmf_p2p_discover_listen(struct brcmf_p2p_info * p2p,u16 channel,u32 duration)934 brcmf_p2p_discover_listen(struct brcmf_p2p_info *p2p, u16 channel, u32 duration)
935 {
936 struct brcmf_pub *drvr = p2p->cfg->pub;
937 struct brcmf_cfg80211_vif *vif;
938 struct brcmu_chan ch;
939 s32 err = 0;
940
941 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif;
942 if (!vif) {
943 bphy_err(drvr, "Discovery is not set, so we have nothing to do\n");
944 err = -EPERM;
945 goto exit;
946 }
947
948 if (test_bit(BRCMF_P2P_STATUS_DISCOVER_LISTEN, &p2p->status)) {
949 bphy_err(drvr, "Previous LISTEN is not completed yet\n");
950 /* WAR: prevent cookie mismatch in wpa_supplicant return OK */
951 goto exit;
952 }
953
954 ch.chnum = channel;
955 ch.bw = BRCMU_CHAN_BW_20;
956 p2p->cfg->d11inf.encchspec(&ch);
957 err = brcmf_p2p_set_discover_state(vif->ifp, WL_P2P_DISC_ST_LISTEN,
958 ch.chspec, (u16)duration);
959 if (!err) {
960 set_bit(BRCMF_P2P_STATUS_DISCOVER_LISTEN, &p2p->status);
961 p2p->remain_on_channel_cookie++;
962 }
963 exit:
964 return err;
965 }
966
967
968 /**
969 * brcmf_p2p_remain_on_channel() - put device on channel and stay there.
970 *
971 * @wiphy: wiphy device.
972 * @wdev: wireless device.
973 * @channel: channel to stay on.
974 * @duration: time in ms to remain on channel.
975 * @cookie: cookie.
976 */
brcmf_p2p_remain_on_channel(struct wiphy * wiphy,struct wireless_dev * wdev,struct ieee80211_channel * channel,unsigned int duration,u64 * cookie)977 int brcmf_p2p_remain_on_channel(struct wiphy *wiphy, struct wireless_dev *wdev,
978 struct ieee80211_channel *channel,
979 unsigned int duration, u64 *cookie)
980 {
981 struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
982 struct brcmf_p2p_info *p2p = &cfg->p2p;
983 s32 err;
984 u16 channel_nr;
985
986 channel_nr = ieee80211_frequency_to_channel(channel->center_freq);
987 brcmf_dbg(TRACE, "Enter, channel: %d, duration ms (%d)\n", channel_nr,
988 duration);
989
990 err = brcmf_p2p_enable_discovery(p2p);
991 if (err)
992 goto exit;
993 err = brcmf_p2p_discover_listen(p2p, channel_nr, duration);
994 if (err)
995 goto exit;
996
997 memcpy(&p2p->remain_on_channel, channel, sizeof(*channel));
998 *cookie = p2p->remain_on_channel_cookie;
999 cfg80211_ready_on_channel(wdev, *cookie, channel, duration, GFP_KERNEL);
1000
1001 exit:
1002 return err;
1003 }
1004
1005
1006 /**
1007 * brcmf_p2p_notify_listen_complete() - p2p listen has completed.
1008 *
1009 * @ifp: interfac control.
1010 * @e: event message. Not used, to make it usable for fweh event dispatcher.
1011 * @data: payload of message. Not used.
1012 *
1013 */
brcmf_p2p_notify_listen_complete(struct brcmf_if * ifp,const struct brcmf_event_msg * e,void * data)1014 int brcmf_p2p_notify_listen_complete(struct brcmf_if *ifp,
1015 const struct brcmf_event_msg *e,
1016 void *data)
1017 {
1018 struct brcmf_cfg80211_info *cfg = ifp->drvr->config;
1019 struct brcmf_p2p_info *p2p = &cfg->p2p;
1020
1021 brcmf_dbg(TRACE, "Enter\n");
1022 if (test_and_clear_bit(BRCMF_P2P_STATUS_DISCOVER_LISTEN,
1023 &p2p->status)) {
1024 if (test_and_clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_AF_LISTEN,
1025 &p2p->status)) {
1026 clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME,
1027 &p2p->status);
1028 brcmf_dbg(INFO, "Listen DONE, wake up wait_next_af\n");
1029 complete(&p2p->wait_next_af);
1030 }
1031
1032 cfg80211_remain_on_channel_expired(&ifp->vif->wdev,
1033 p2p->remain_on_channel_cookie,
1034 &p2p->remain_on_channel,
1035 GFP_KERNEL);
1036 }
1037 return 0;
1038 }
1039
1040
1041 /**
1042 * brcmf_p2p_cancel_remain_on_channel() - cancel p2p listen state.
1043 *
1044 * @ifp: interfac control.
1045 *
1046 */
brcmf_p2p_cancel_remain_on_channel(struct brcmf_if * ifp)1047 void brcmf_p2p_cancel_remain_on_channel(struct brcmf_if *ifp)
1048 {
1049 if (!ifp)
1050 return;
1051 brcmf_p2p_set_discover_state(ifp, WL_P2P_DISC_ST_SCAN, 0, 0);
1052 brcmf_p2p_notify_listen_complete(ifp, NULL, NULL);
1053 }
1054
1055
1056 /**
1057 * brcmf_p2p_act_frm_search() - search function for action frame.
1058 *
1059 * @p2p: p2p device.
1060 * @channel: channel on which action frame is to be trasmitted.
1061 *
1062 * search function to reach at common channel to send action frame. When
1063 * channel is 0 then all social channels will be used to send af
1064 */
brcmf_p2p_act_frm_search(struct brcmf_p2p_info * p2p,u16 channel)1065 static s32 brcmf_p2p_act_frm_search(struct brcmf_p2p_info *p2p, u16 channel)
1066 {
1067 struct brcmf_pub *drvr = p2p->cfg->pub;
1068 s32 err;
1069 u32 channel_cnt;
1070 u16 *default_chan_list;
1071 u32 i;
1072 struct brcmu_chan ch;
1073
1074 brcmf_dbg(TRACE, "Enter\n");
1075
1076 if (channel)
1077 channel_cnt = AF_PEER_SEARCH_CNT;
1078 else
1079 channel_cnt = SOCIAL_CHAN_CNT;
1080 default_chan_list = kcalloc(channel_cnt, sizeof(*default_chan_list),
1081 GFP_KERNEL);
1082 if (default_chan_list == NULL) {
1083 bphy_err(drvr, "channel list allocation failed\n");
1084 err = -ENOMEM;
1085 goto exit;
1086 }
1087 ch.bw = BRCMU_CHAN_BW_20;
1088 if (channel) {
1089 ch.chnum = channel;
1090 p2p->cfg->d11inf.encchspec(&ch);
1091 /* insert same channel to the chan_list */
1092 for (i = 0; i < channel_cnt; i++)
1093 default_chan_list[i] = ch.chspec;
1094 } else {
1095 ch.chnum = SOCIAL_CHAN_1;
1096 p2p->cfg->d11inf.encchspec(&ch);
1097 default_chan_list[0] = ch.chspec;
1098 ch.chnum = SOCIAL_CHAN_2;
1099 p2p->cfg->d11inf.encchspec(&ch);
1100 default_chan_list[1] = ch.chspec;
1101 ch.chnum = SOCIAL_CHAN_3;
1102 p2p->cfg->d11inf.encchspec(&ch);
1103 default_chan_list[2] = ch.chspec;
1104 }
1105 err = brcmf_p2p_escan(p2p, channel_cnt, default_chan_list,
1106 WL_P2P_DISC_ST_SEARCH, P2PAPI_BSSCFG_DEVICE);
1107 kfree(default_chan_list);
1108 exit:
1109 return err;
1110 }
1111
1112
1113 /**
1114 * brcmf_p2p_afx_handler() - afx worker thread.
1115 *
1116 * @work:
1117 *
1118 */
brcmf_p2p_afx_handler(struct work_struct * work)1119 static void brcmf_p2p_afx_handler(struct work_struct *work)
1120 {
1121 struct afx_hdl *afx_hdl = container_of(work, struct afx_hdl, afx_work);
1122 struct brcmf_p2p_info *p2p = container_of(afx_hdl,
1123 struct brcmf_p2p_info,
1124 afx_hdl);
1125 struct brcmf_pub *drvr = p2p->cfg->pub;
1126 s32 err;
1127
1128 if (!afx_hdl->is_active)
1129 return;
1130
1131 if (afx_hdl->is_listen && afx_hdl->my_listen_chan)
1132 /* 100ms ~ 300ms */
1133 err = brcmf_p2p_discover_listen(p2p, afx_hdl->my_listen_chan,
1134 100 * get_random_u32_inclusive(1, 3));
1135 else
1136 err = brcmf_p2p_act_frm_search(p2p, afx_hdl->peer_listen_chan);
1137
1138 if (err) {
1139 bphy_err(drvr, "ERROR occurred! value is (%d)\n", err);
1140 if (test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL,
1141 &p2p->status))
1142 complete(&afx_hdl->act_frm_scan);
1143 }
1144 }
1145
1146
1147 /**
1148 * brcmf_p2p_af_searching_channel() - search channel.
1149 *
1150 * @p2p: p2p device info struct.
1151 *
1152 */
brcmf_p2p_af_searching_channel(struct brcmf_p2p_info * p2p)1153 static s32 brcmf_p2p_af_searching_channel(struct brcmf_p2p_info *p2p)
1154 {
1155 struct afx_hdl *afx_hdl = &p2p->afx_hdl;
1156 struct brcmf_cfg80211_vif *pri_vif;
1157 s32 retry;
1158
1159 brcmf_dbg(TRACE, "Enter\n");
1160
1161 pri_vif = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif;
1162
1163 reinit_completion(&afx_hdl->act_frm_scan);
1164 set_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status);
1165 afx_hdl->is_active = true;
1166 afx_hdl->peer_chan = P2P_INVALID_CHANNEL;
1167
1168 /* Loop to wait until we find a peer's channel or the
1169 * pending action frame tx is cancelled.
1170 */
1171 retry = 0;
1172 while ((retry < P2P_CHANNEL_SYNC_RETRY) &&
1173 (afx_hdl->peer_chan == P2P_INVALID_CHANNEL)) {
1174 afx_hdl->is_listen = false;
1175 brcmf_dbg(TRACE, "Scheduling action frame for sending.. (%d)\n",
1176 retry);
1177 /* search peer on peer's listen channel */
1178 schedule_work(&afx_hdl->afx_work);
1179 wait_for_completion_timeout(&afx_hdl->act_frm_scan,
1180 P2P_AF_FRM_SCAN_MAX_WAIT);
1181 if ((afx_hdl->peer_chan != P2P_INVALID_CHANNEL) ||
1182 (!test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL,
1183 &p2p->status)))
1184 break;
1185
1186 if (afx_hdl->my_listen_chan) {
1187 brcmf_dbg(TRACE, "Scheduling listen peer, channel=%d\n",
1188 afx_hdl->my_listen_chan);
1189 /* listen on my listen channel */
1190 afx_hdl->is_listen = true;
1191 schedule_work(&afx_hdl->afx_work);
1192 wait_for_completion_timeout(&afx_hdl->act_frm_scan,
1193 P2P_AF_FRM_SCAN_MAX_WAIT);
1194 }
1195 if ((afx_hdl->peer_chan != P2P_INVALID_CHANNEL) ||
1196 (!test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL,
1197 &p2p->status)))
1198 break;
1199 retry++;
1200
1201 /* if sta is connected or connecting, sleep for a while before
1202 * retry af tx or finding a peer
1203 */
1204 if (test_bit(BRCMF_VIF_STATUS_CONNECTED, &pri_vif->sme_state) ||
1205 test_bit(BRCMF_VIF_STATUS_CONNECTING, &pri_vif->sme_state))
1206 #if defined(__linux__)
1207 msleep(P2P_DEFAULT_SLEEP_TIME_VSDB);
1208 #elif defined(__FreeBSD__)
1209 linux_msleep(P2P_DEFAULT_SLEEP_TIME_VSDB);
1210 #endif
1211 }
1212
1213 brcmf_dbg(TRACE, "Completed search/listen peer_chan=%d\n",
1214 afx_hdl->peer_chan);
1215 afx_hdl->is_active = false;
1216
1217 clear_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status);
1218
1219 return afx_hdl->peer_chan;
1220 }
1221
1222
1223 /**
1224 * brcmf_p2p_scan_finding_common_channel() - was escan used for finding channel
1225 *
1226 * @cfg: common configuration struct.
1227 * @bi: bss info struct, result from scan.
1228 *
1229 */
brcmf_p2p_scan_finding_common_channel(struct brcmf_cfg80211_info * cfg,struct brcmf_bss_info_le * bi)1230 bool brcmf_p2p_scan_finding_common_channel(struct brcmf_cfg80211_info *cfg,
1231 struct brcmf_bss_info_le *bi)
1232
1233 {
1234 struct brcmf_p2p_info *p2p = &cfg->p2p;
1235 struct afx_hdl *afx_hdl = &p2p->afx_hdl;
1236 struct brcmu_chan ch;
1237 u8 *ie;
1238 s32 err;
1239 u8 p2p_dev_addr[ETH_ALEN];
1240
1241 if (!test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status))
1242 return false;
1243
1244 if (bi == NULL) {
1245 brcmf_dbg(TRACE, "ACTION FRAME SCAN Done\n");
1246 if (afx_hdl->peer_chan == P2P_INVALID_CHANNEL)
1247 complete(&afx_hdl->act_frm_scan);
1248 return true;
1249 }
1250
1251 ie = ((u8 *)bi) + le16_to_cpu(bi->ie_offset);
1252 memset(p2p_dev_addr, 0, sizeof(p2p_dev_addr));
1253 err = cfg80211_get_p2p_attr(ie, le32_to_cpu(bi->ie_length),
1254 IEEE80211_P2P_ATTR_DEVICE_INFO,
1255 p2p_dev_addr, sizeof(p2p_dev_addr));
1256 if (err < 0)
1257 err = cfg80211_get_p2p_attr(ie, le32_to_cpu(bi->ie_length),
1258 IEEE80211_P2P_ATTR_DEVICE_ID,
1259 p2p_dev_addr, sizeof(p2p_dev_addr));
1260 if ((err >= 0) &&
1261 (ether_addr_equal(p2p_dev_addr, afx_hdl->tx_dst_addr))) {
1262 if (!bi->ctl_ch) {
1263 ch.chspec = le16_to_cpu(bi->chanspec);
1264 cfg->d11inf.decchspec(&ch);
1265 bi->ctl_ch = ch.control_ch_num;
1266 }
1267 afx_hdl->peer_chan = bi->ctl_ch;
1268 brcmf_dbg(TRACE, "ACTION FRAME SCAN : Peer %pM found, channel : %d\n",
1269 afx_hdl->tx_dst_addr, afx_hdl->peer_chan);
1270 complete(&afx_hdl->act_frm_scan);
1271 }
1272 return true;
1273 }
1274
1275 /**
1276 * brcmf_p2p_abort_action_frame() - abort action frame.
1277 *
1278 * @cfg: common configuration struct.
1279 *
1280 */
brcmf_p2p_abort_action_frame(struct brcmf_cfg80211_info * cfg)1281 static s32 brcmf_p2p_abort_action_frame(struct brcmf_cfg80211_info *cfg)
1282 {
1283 struct brcmf_p2p_info *p2p = &cfg->p2p;
1284 struct brcmf_cfg80211_vif *vif;
1285 s32 err;
1286 s32 int_val = 1;
1287
1288 brcmf_dbg(TRACE, "Enter\n");
1289
1290 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif;
1291 err = brcmf_fil_bsscfg_data_set(vif->ifp, "actframe_abort", &int_val,
1292 sizeof(s32));
1293 if (err)
1294 brcmf_err(" aborting action frame has failed (%d)\n", err);
1295
1296 return err;
1297 }
1298
1299 /**
1300 * brcmf_p2p_stop_wait_next_action_frame() - finish scan if af tx complete.
1301 *
1302 * @cfg: common configuration struct.
1303 *
1304 */
1305 static void
brcmf_p2p_stop_wait_next_action_frame(struct brcmf_cfg80211_info * cfg)1306 brcmf_p2p_stop_wait_next_action_frame(struct brcmf_cfg80211_info *cfg)
1307 {
1308 struct brcmf_p2p_info *p2p = &cfg->p2p;
1309 struct brcmf_if *ifp = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->ifp;
1310 s32 err;
1311
1312 if (test_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status) &&
1313 (test_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status) ||
1314 test_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status))) {
1315 brcmf_dbg(TRACE, "*** Wake UP ** abort actframe iovar\n");
1316 /* if channel is not zero, "actfame" uses off channel scan.
1317 * So abort scan for off channel completion.
1318 */
1319 if (p2p->af_sent_channel) {
1320 /* abort actframe using actframe_abort or abort scan */
1321 err = brcmf_p2p_abort_action_frame(cfg);
1322 if (err)
1323 brcmf_notify_escan_complete(cfg, ifp, true,
1324 true);
1325 }
1326 } else if (test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_AF_LISTEN,
1327 &p2p->status)) {
1328 brcmf_dbg(TRACE, "*** Wake UP ** abort listen for next af frame\n");
1329 /* So abort scan to cancel listen */
1330 brcmf_notify_escan_complete(cfg, ifp, true, true);
1331 }
1332 }
1333
1334
1335 /**
1336 * brcmf_p2p_gon_req_collision() - Check if go negotiaton collission
1337 *
1338 * @p2p: p2p device info struct.
1339 * @mac: MAC address.
1340 *
1341 * return true if recevied action frame is to be dropped.
1342 */
1343 static bool
1344 #if defined(__linux__)
brcmf_p2p_gon_req_collision(struct brcmf_p2p_info * p2p,u8 * mac)1345 brcmf_p2p_gon_req_collision(struct brcmf_p2p_info *p2p, u8 *mac)
1346 #elif defined(__FreeBSD__)
1347 brcmf_p2p_gon_req_collision(struct brcmf_p2p_info *p2p, const u8 *mac)
1348 #endif
1349 {
1350 struct brcmf_cfg80211_info *cfg = p2p->cfg;
1351 struct brcmf_if *ifp;
1352
1353 brcmf_dbg(TRACE, "Enter\n");
1354
1355 if (!test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status) ||
1356 !p2p->gon_req_action)
1357 return false;
1358
1359 brcmf_dbg(TRACE, "GO Negotiation Request COLLISION !!!\n");
1360 /* if sa(peer) addr is less than da(my) addr, then this device
1361 * process peer's gon request and block to send gon req.
1362 * if not (sa addr > da addr),
1363 * this device will process gon request and drop gon req of peer.
1364 */
1365 ifp = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif->ifp;
1366 if (memcmp(mac, ifp->mac_addr, ETH_ALEN) < 0) {
1367 brcmf_dbg(INFO, "Block transmit gon req !!!\n");
1368 p2p->block_gon_req_tx = true;
1369 /* if we are finding a common channel for sending af,
1370 * do not scan more to block to send current gon req
1371 */
1372 if (test_and_clear_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL,
1373 &p2p->status))
1374 complete(&p2p->afx_hdl.act_frm_scan);
1375 if (test_and_clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME,
1376 &p2p->status))
1377 brcmf_p2p_stop_wait_next_action_frame(cfg);
1378 return false;
1379 }
1380
1381 /* drop gon request of peer to process gon request by this device. */
1382 brcmf_dbg(INFO, "Drop received gon req !!!\n");
1383
1384 return true;
1385 }
1386
1387
1388 /**
1389 * brcmf_p2p_notify_action_frame_rx() - received action frame.
1390 *
1391 * @ifp: interfac control.
1392 * @e: event message. Not used, to make it usable for fweh event dispatcher.
1393 * @data: payload of message, containing action frame data.
1394 *
1395 */
brcmf_p2p_notify_action_frame_rx(struct brcmf_if * ifp,const struct brcmf_event_msg * e,void * data)1396 int brcmf_p2p_notify_action_frame_rx(struct brcmf_if *ifp,
1397 const struct brcmf_event_msg *e,
1398 void *data)
1399 {
1400 struct brcmf_pub *drvr = ifp->drvr;
1401 struct brcmf_cfg80211_info *cfg = drvr->config;
1402 struct brcmf_p2p_info *p2p = &cfg->p2p;
1403 struct afx_hdl *afx_hdl = &p2p->afx_hdl;
1404 struct wireless_dev *wdev;
1405 u32 mgmt_frame_len = e->datalen - sizeof(struct brcmf_rx_mgmt_data);
1406 struct brcmf_rx_mgmt_data *rxframe = (struct brcmf_rx_mgmt_data *)data;
1407 u8 *frame = (u8 *)(rxframe + 1);
1408 struct brcmf_p2p_pub_act_frame *act_frm;
1409 struct brcmf_p2psd_gas_pub_act_frame *sd_act_frm;
1410 struct brcmu_chan ch;
1411 struct ieee80211_mgmt *mgmt_frame;
1412 s32 freq;
1413 u16 mgmt_type;
1414 u8 action;
1415
1416 if (e->datalen < sizeof(*rxframe)) {
1417 brcmf_dbg(SCAN, "Event data too small. Ignore\n");
1418 return 0;
1419 }
1420
1421 ch.chspec = be16_to_cpu(rxframe->chanspec);
1422 cfg->d11inf.decchspec(&ch);
1423 /* Check if wpa_supplicant has registered for this frame */
1424 brcmf_dbg(INFO, "ifp->vif->mgmt_rx_reg %04x\n", ifp->vif->mgmt_rx_reg);
1425 mgmt_type = (IEEE80211_STYPE_ACTION & IEEE80211_FCTL_STYPE) >> 4;
1426 if ((ifp->vif->mgmt_rx_reg & BIT(mgmt_type)) == 0)
1427 return 0;
1428
1429 brcmf_p2p_print_actframe(false, frame, mgmt_frame_len);
1430
1431 action = P2P_PAF_SUBTYPE_INVALID;
1432 if (brcmf_p2p_is_pub_action(frame, mgmt_frame_len)) {
1433 act_frm = (struct brcmf_p2p_pub_act_frame *)frame;
1434 action = act_frm->subtype;
1435 if ((action == P2P_PAF_GON_REQ) &&
1436 #if defined(__linux__)
1437 (brcmf_p2p_gon_req_collision(p2p, (u8 *)e->addr))) {
1438 #elif defined(__FreeBSD__)
1439 (brcmf_p2p_gon_req_collision(p2p, e->addr))) {
1440 #endif
1441 if (test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL,
1442 &p2p->status) &&
1443 (ether_addr_equal(afx_hdl->tx_dst_addr, e->addr))) {
1444 afx_hdl->peer_chan = ch.control_ch_num;
1445 brcmf_dbg(INFO, "GON request: Peer found, channel=%d\n",
1446 afx_hdl->peer_chan);
1447 complete(&afx_hdl->act_frm_scan);
1448 }
1449 return 0;
1450 }
1451 /* After complete GO Negotiation, roll back to mpc mode */
1452 if ((action == P2P_PAF_GON_CONF) ||
1453 (action == P2P_PAF_PROVDIS_RSP))
1454 brcmf_set_mpc(ifp, 1);
1455 if (action == P2P_PAF_GON_CONF) {
1456 brcmf_dbg(TRACE, "P2P: GO_NEG_PHASE status cleared\n");
1457 clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status);
1458 }
1459 } else if (brcmf_p2p_is_gas_action(frame, mgmt_frame_len)) {
1460 sd_act_frm = (struct brcmf_p2psd_gas_pub_act_frame *)frame;
1461 action = sd_act_frm->action;
1462 }
1463
1464 if (test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status) &&
1465 (p2p->next_af_subtype == action)) {
1466 brcmf_dbg(TRACE, "We got a right next frame! (%d)\n", action);
1467 clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME,
1468 &p2p->status);
1469 /* Stop waiting for next AF. */
1470 brcmf_p2p_stop_wait_next_action_frame(cfg);
1471 }
1472
1473 mgmt_frame = kzalloc(offsetof(struct ieee80211_mgmt, u) +
1474 mgmt_frame_len, GFP_KERNEL);
1475 if (!mgmt_frame) {
1476 bphy_err(drvr, "No memory available for action frame\n");
1477 return -ENOMEM;
1478 }
1479 memcpy(mgmt_frame->da, ifp->mac_addr, ETH_ALEN);
1480 brcmf_fil_cmd_data_get(ifp, BRCMF_C_GET_BSSID, mgmt_frame->bssid,
1481 ETH_ALEN);
1482 memcpy(mgmt_frame->sa, e->addr, ETH_ALEN);
1483 mgmt_frame->frame_control = cpu_to_le16(IEEE80211_STYPE_ACTION);
1484 memcpy(mgmt_frame->u.body, frame, mgmt_frame_len);
1485 mgmt_frame_len += offsetof(struct ieee80211_mgmt, u.body);
1486
1487 freq = ieee80211_channel_to_frequency(ch.control_ch_num,
1488 ch.band == BRCMU_CHAN_BAND_2G ?
1489 NL80211_BAND_2GHZ :
1490 NL80211_BAND_5GHZ);
1491
1492 wdev = &ifp->vif->wdev;
1493 cfg80211_rx_mgmt(wdev, freq, 0, (u8 *)mgmt_frame, mgmt_frame_len, 0);
1494
1495 kfree(mgmt_frame);
1496 return 0;
1497 }
1498
1499
1500 /**
1501 * brcmf_p2p_notify_action_tx_complete() - transmit action frame complete
1502 *
1503 * @ifp: interfac control.
1504 * @e: event message. Not used, to make it usable for fweh event dispatcher.
1505 * @data: not used.
1506 *
1507 */
1508 int brcmf_p2p_notify_action_tx_complete(struct brcmf_if *ifp,
1509 const struct brcmf_event_msg *e,
1510 void *data)
1511 {
1512 struct brcmf_cfg80211_info *cfg = ifp->drvr->config;
1513 struct brcmf_p2p_info *p2p = &cfg->p2p;
1514
1515 brcmf_dbg(INFO, "Enter: event %s, status=%d\n",
1516 e->event_code == BRCMF_E_ACTION_FRAME_OFF_CHAN_COMPLETE ?
1517 "ACTION_FRAME_OFF_CHAN_COMPLETE" : "ACTION_FRAME_COMPLETE",
1518 e->status);
1519
1520 if (!test_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status))
1521 return 0;
1522
1523 if (e->event_code == BRCMF_E_ACTION_FRAME_COMPLETE) {
1524 if (e->status == BRCMF_E_STATUS_SUCCESS) {
1525 set_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED,
1526 &p2p->status);
1527 if (!p2p->wait_for_offchan_complete)
1528 complete(&p2p->send_af_done);
1529 } else {
1530 set_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status);
1531 /* If there is no ack, we don't need to wait for
1532 * WLC_E_ACTION_FRAME_OFFCHAN_COMPLETE event
1533 */
1534 brcmf_p2p_stop_wait_next_action_frame(cfg);
1535 }
1536
1537 } else {
1538 complete(&p2p->send_af_done);
1539 }
1540 return 0;
1541 }
1542
1543
1544 /**
1545 * brcmf_p2p_tx_action_frame() - send action frame over fil.
1546 *
1547 * @ifp: interface to transmit on.
1548 * @p2p: p2p info struct for vif.
1549 * @af_params: action frame data/info.
1550 *
1551 * Send an action frame immediately without doing channel synchronization.
1552 *
1553 * This function waits for a completion event before returning.
1554 * The WLC_E_ACTION_FRAME_COMPLETE event will be received when the action
1555 * frame is transmitted.
1556 */
1557 static s32 brcmf_p2p_tx_action_frame(struct brcmf_if *ifp,
1558 struct brcmf_p2p_info *p2p,
1559 struct brcmf_fil_af_params_le *af_params)
1560 {
1561 struct brcmf_pub *drvr = p2p->cfg->pub;
1562 s32 err = 0;
1563
1564 brcmf_dbg(TRACE, "Enter\n");
1565
1566 reinit_completion(&p2p->send_af_done);
1567 clear_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status);
1568 clear_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status);
1569
1570 err = brcmf_fil_bsscfg_data_set(ifp, "actframe", af_params,
1571 sizeof(*af_params));
1572 if (err) {
1573 bphy_err(drvr, " sending action frame has failed\n");
1574 goto exit;
1575 }
1576
1577 p2p->af_sent_channel = le32_to_cpu(af_params->channel);
1578 p2p->af_tx_sent_jiffies = jiffies;
1579
1580 if (test_bit(BRCMF_P2P_STATUS_DISCOVER_LISTEN, &p2p->status) &&
1581 p2p->af_sent_channel ==
1582 ieee80211_frequency_to_channel(p2p->remain_on_channel.center_freq))
1583 p2p->wait_for_offchan_complete = false;
1584 else
1585 p2p->wait_for_offchan_complete = true;
1586
1587 brcmf_dbg(TRACE, "Waiting for %s tx completion event\n",
1588 (p2p->wait_for_offchan_complete) ?
1589 "off-channel" : "on-channel");
1590
1591 wait_for_completion_timeout(&p2p->send_af_done, P2P_AF_MAX_WAIT_TIME);
1592
1593 if (test_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status)) {
1594 brcmf_dbg(TRACE, "TX action frame operation is success\n");
1595 } else {
1596 err = -EIO;
1597 brcmf_dbg(TRACE, "TX action frame operation has failed\n");
1598 }
1599 /* clear status bit for action tx */
1600 clear_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status);
1601 clear_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status);
1602
1603 exit:
1604 return err;
1605 }
1606
1607
1608 /**
1609 * brcmf_p2p_pub_af_tx() - public action frame tx routine.
1610 *
1611 * @cfg: driver private data for cfg80211 interface.
1612 * @af_params: action frame data/info.
1613 * @config_af_params: configuration data for action frame.
1614 *
1615 * routine which transmits ation frame public type.
1616 */
1617 static s32 brcmf_p2p_pub_af_tx(struct brcmf_cfg80211_info *cfg,
1618 struct brcmf_fil_af_params_le *af_params,
1619 struct brcmf_config_af_params *config_af_params)
1620 {
1621 struct brcmf_p2p_info *p2p = &cfg->p2p;
1622 struct brcmf_pub *drvr = cfg->pub;
1623 struct brcmf_fil_action_frame_le *action_frame;
1624 struct brcmf_p2p_pub_act_frame *act_frm;
1625 s32 err = 0;
1626 u16 ie_len;
1627
1628 action_frame = &af_params->action_frame;
1629 act_frm = (struct brcmf_p2p_pub_act_frame *)(action_frame->data);
1630
1631 config_af_params->extra_listen = true;
1632
1633 switch (act_frm->subtype) {
1634 case P2P_PAF_GON_REQ:
1635 brcmf_dbg(TRACE, "P2P: GO_NEG_PHASE status set\n");
1636 set_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status);
1637 config_af_params->mpc_onoff = 0;
1638 config_af_params->search_channel = true;
1639 p2p->next_af_subtype = act_frm->subtype + 1;
1640 p2p->gon_req_action = true;
1641 /* increase dwell time to wait for RESP frame */
1642 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME);
1643 break;
1644 case P2P_PAF_GON_RSP:
1645 p2p->next_af_subtype = act_frm->subtype + 1;
1646 /* increase dwell time to wait for CONF frame */
1647 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME);
1648 break;
1649 case P2P_PAF_GON_CONF:
1650 /* If we reached till GO Neg confirmation reset the filter */
1651 brcmf_dbg(TRACE, "P2P: GO_NEG_PHASE status cleared\n");
1652 clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status);
1653 /* turn on mpc again if go nego is done */
1654 config_af_params->mpc_onoff = 1;
1655 /* minimize dwell time */
1656 af_params->dwell_time = cpu_to_le32(P2P_AF_MIN_DWELL_TIME);
1657 config_af_params->extra_listen = false;
1658 break;
1659 case P2P_PAF_INVITE_REQ:
1660 config_af_params->search_channel = true;
1661 p2p->next_af_subtype = act_frm->subtype + 1;
1662 /* increase dwell time */
1663 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME);
1664 break;
1665 case P2P_PAF_INVITE_RSP:
1666 /* minimize dwell time */
1667 af_params->dwell_time = cpu_to_le32(P2P_AF_MIN_DWELL_TIME);
1668 config_af_params->extra_listen = false;
1669 break;
1670 case P2P_PAF_DEVDIS_REQ:
1671 config_af_params->search_channel = true;
1672 p2p->next_af_subtype = act_frm->subtype + 1;
1673 /* maximize dwell time to wait for RESP frame */
1674 af_params->dwell_time = cpu_to_le32(P2P_AF_LONG_DWELL_TIME);
1675 break;
1676 case P2P_PAF_DEVDIS_RSP:
1677 /* minimize dwell time */
1678 af_params->dwell_time = cpu_to_le32(P2P_AF_MIN_DWELL_TIME);
1679 config_af_params->extra_listen = false;
1680 break;
1681 case P2P_PAF_PROVDIS_REQ:
1682 ie_len = le16_to_cpu(action_frame->len) -
1683 offsetof(struct brcmf_p2p_pub_act_frame, elts);
1684 if (cfg80211_get_p2p_attr(&act_frm->elts[0], ie_len,
1685 IEEE80211_P2P_ATTR_GROUP_ID,
1686 NULL, 0) < 0)
1687 config_af_params->search_channel = true;
1688 config_af_params->mpc_onoff = 0;
1689 p2p->next_af_subtype = act_frm->subtype + 1;
1690 /* increase dwell time to wait for RESP frame */
1691 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME);
1692 break;
1693 case P2P_PAF_PROVDIS_RSP:
1694 /* wpa_supplicant send go nego req right after prov disc */
1695 p2p->next_af_subtype = P2P_PAF_GON_REQ;
1696 /* increase dwell time to MED level */
1697 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME);
1698 config_af_params->extra_listen = false;
1699 break;
1700 default:
1701 bphy_err(drvr, "Unknown p2p pub act frame subtype: %d\n",
1702 act_frm->subtype);
1703 err = -EINVAL;
1704 }
1705 return err;
1706 }
1707
1708 static bool brcmf_p2p_check_dwell_overflow(u32 requested_dwell,
1709 unsigned long dwell_jiffies)
1710 {
1711 if ((requested_dwell & CUSTOM_RETRY_MASK) &&
1712 (jiffies_to_msecs(jiffies - dwell_jiffies) >
1713 (requested_dwell & ~CUSTOM_RETRY_MASK))) {
1714 brcmf_err("Action frame TX retry time over dwell time!\n");
1715 return true;
1716 }
1717 return false;
1718 }
1719 /**
1720 * brcmf_p2p_send_action_frame() - send action frame .
1721 *
1722 * @ifp: interface to transmit on.
1723 * @af_params: configuration data for action frame.
1724 */
1725 bool brcmf_p2p_send_action_frame(struct brcmf_if *ifp,
1726 struct brcmf_fil_af_params_le *af_params)
1727 {
1728 struct brcmf_cfg80211_info *cfg = ifp->drvr->config;
1729 struct brcmf_p2p_info *p2p = &cfg->p2p;
1730 struct brcmf_fil_action_frame_le *action_frame;
1731 struct brcmf_config_af_params config_af_params;
1732 struct afx_hdl *afx_hdl = &p2p->afx_hdl;
1733 struct brcmf_pub *drvr = cfg->pub;
1734 u16 action_frame_len;
1735 bool ack = false;
1736 u8 category;
1737 u8 action;
1738 s32 tx_retry;
1739 s32 extra_listen_time;
1740 uint delta_ms;
1741 unsigned long dwell_jiffies = 0;
1742 bool dwell_overflow = false;
1743
1744 u32 requested_dwell = le32_to_cpu(af_params->dwell_time);
1745 action_frame = &af_params->action_frame;
1746 action_frame_len = le16_to_cpu(action_frame->len);
1747
1748 brcmf_p2p_print_actframe(true, action_frame->data, action_frame_len);
1749
1750 /* Add the default dwell time. Dwell time to stay off-channel */
1751 /* to wait for a response action frame after transmitting an */
1752 /* GO Negotiation action frame */
1753 af_params->dwell_time = cpu_to_le32(P2P_AF_DWELL_TIME);
1754
1755 category = action_frame->data[DOT11_ACTION_CAT_OFF];
1756 action = action_frame->data[DOT11_ACTION_ACT_OFF];
1757
1758 /* initialize variables */
1759 p2p->next_af_subtype = P2P_PAF_SUBTYPE_INVALID;
1760 p2p->gon_req_action = false;
1761
1762 /* config parameters */
1763 config_af_params.mpc_onoff = -1;
1764 config_af_params.search_channel = false;
1765 config_af_params.extra_listen = false;
1766
1767 if (brcmf_p2p_is_pub_action(action_frame->data, action_frame_len)) {
1768 /* p2p public action frame process */
1769 if (brcmf_p2p_pub_af_tx(cfg, af_params, &config_af_params)) {
1770 /* Just send unknown subtype frame with */
1771 /* default parameters. */
1772 bphy_err(drvr, "P2P Public action frame, unknown subtype.\n");
1773 }
1774 } else if (brcmf_p2p_is_gas_action(action_frame->data,
1775 action_frame_len)) {
1776 /* service discovery process */
1777 if (action == P2PSD_ACTION_ID_GAS_IREQ ||
1778 action == P2PSD_ACTION_ID_GAS_CREQ) {
1779 /* configure service discovery query frame */
1780 config_af_params.search_channel = true;
1781
1782 /* save next af suptype to cancel */
1783 /* remaining dwell time */
1784 p2p->next_af_subtype = action + 1;
1785
1786 af_params->dwell_time =
1787 cpu_to_le32(P2P_AF_MED_DWELL_TIME);
1788 } else if (action == P2PSD_ACTION_ID_GAS_IRESP ||
1789 action == P2PSD_ACTION_ID_GAS_CRESP) {
1790 /* configure service discovery response frame */
1791 af_params->dwell_time =
1792 cpu_to_le32(P2P_AF_MIN_DWELL_TIME);
1793 } else {
1794 bphy_err(drvr, "Unknown action type: %d\n", action);
1795 goto exit;
1796 }
1797 } else if (brcmf_p2p_is_p2p_action(action_frame->data,
1798 action_frame_len)) {
1799 /* do not configure anything. it will be */
1800 /* sent with a default configuration */
1801 } else {
1802 bphy_err(drvr, "Unknown Frame: category 0x%x, action 0x%x\n",
1803 category, action);
1804 return false;
1805 }
1806
1807 /* if connecting on primary iface, sleep for a while before sending
1808 * af tx for VSDB
1809 */
1810 if (test_bit(BRCMF_VIF_STATUS_CONNECTING,
1811 &p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->sme_state))
1812 #if defined(__linux__)
1813 msleep(50);
1814 #elif defined(__FreeBSD__)
1815 linux_msleep(50);
1816 #endif
1817
1818 /* if scan is ongoing, abort current scan. */
1819 if (test_bit(BRCMF_SCAN_STATUS_BUSY, &cfg->scan_status))
1820 brcmf_abort_scanning(cfg);
1821
1822 memcpy(afx_hdl->tx_dst_addr, action_frame->da, ETH_ALEN);
1823
1824 /* To make sure to send successfully action frame, turn off mpc */
1825 if (config_af_params.mpc_onoff == 0)
1826 brcmf_set_mpc(ifp, 0);
1827
1828 /* set status and destination address before sending af */
1829 if (p2p->next_af_subtype != P2P_PAF_SUBTYPE_INVALID) {
1830 /* set status to cancel the remained dwell time in rx process */
1831 set_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status);
1832 }
1833
1834 p2p->af_sent_channel = 0;
1835 set_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status);
1836 /* validate channel and p2p ies */
1837 if (config_af_params.search_channel &&
1838 IS_P2P_SOCIAL_CHANNEL(le32_to_cpu(af_params->channel)) &&
1839 p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif->saved_ie.probe_req_ie_len) {
1840 afx_hdl = &p2p->afx_hdl;
1841 afx_hdl->peer_listen_chan = le32_to_cpu(af_params->channel);
1842
1843 if (brcmf_p2p_af_searching_channel(p2p) ==
1844 P2P_INVALID_CHANNEL) {
1845 bphy_err(drvr, "Couldn't find peer's channel.\n");
1846 goto exit;
1847 }
1848
1849 /* Abort scan even for VSDB scenarios. Scan gets aborted in
1850 * firmware but after the check of piggyback algorithm. To take
1851 * care of current piggback algo, lets abort the scan here
1852 * itself.
1853 */
1854 brcmf_notify_escan_complete(cfg, ifp, true, true);
1855
1856 /* update channel */
1857 af_params->channel = cpu_to_le32(afx_hdl->peer_chan);
1858 }
1859 dwell_jiffies = jiffies;
1860 dwell_overflow = brcmf_p2p_check_dwell_overflow(requested_dwell,
1861 dwell_jiffies);
1862
1863 tx_retry = 0;
1864 while (!p2p->block_gon_req_tx &&
1865 (!ack) && (tx_retry < P2P_AF_TX_MAX_RETRY) &&
1866 !dwell_overflow) {
1867 if (af_params->channel)
1868 #if defined(__linux__)
1869 msleep(P2P_AF_RETRY_DELAY_TIME);
1870 #elif defined(__FreeBSD__)
1871 linux_msleep(P2P_AF_RETRY_DELAY_TIME);
1872 #endif
1873
1874 ack = !brcmf_p2p_tx_action_frame(ifp, p2p, af_params);
1875 tx_retry++;
1876 dwell_overflow = brcmf_p2p_check_dwell_overflow(requested_dwell,
1877 dwell_jiffies);
1878 }
1879 if (!ack) {
1880 bphy_err(drvr, "Failed to send Action Frame(retry %d)\n",
1881 tx_retry);
1882 clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status);
1883 }
1884
1885 exit:
1886 clear_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status);
1887
1888 /* WAR: sometimes dongle does not keep the dwell time of 'actframe'.
1889 * if we coundn't get the next action response frame and dongle does
1890 * not keep the dwell time, go to listen state again to get next action
1891 * response frame.
1892 */
1893 if (ack && config_af_params.extra_listen && !p2p->block_gon_req_tx &&
1894 test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status) &&
1895 p2p->af_sent_channel == afx_hdl->my_listen_chan) {
1896 delta_ms = jiffies_to_msecs(jiffies - p2p->af_tx_sent_jiffies);
1897 if (le32_to_cpu(af_params->dwell_time) > delta_ms)
1898 extra_listen_time = le32_to_cpu(af_params->dwell_time) -
1899 delta_ms;
1900 else
1901 extra_listen_time = 0;
1902 if (extra_listen_time > 50) {
1903 set_bit(BRCMF_P2P_STATUS_WAITING_NEXT_AF_LISTEN,
1904 &p2p->status);
1905 brcmf_dbg(INFO, "Wait more time! actual af time:%d, calculated extra listen:%d\n",
1906 le32_to_cpu(af_params->dwell_time),
1907 extra_listen_time);
1908 extra_listen_time += 100;
1909 if (!brcmf_p2p_discover_listen(p2p,
1910 p2p->af_sent_channel,
1911 extra_listen_time)) {
1912 unsigned long duration;
1913
1914 extra_listen_time += 100;
1915 duration = msecs_to_jiffies(extra_listen_time);
1916 wait_for_completion_timeout(&p2p->wait_next_af,
1917 duration);
1918 }
1919 clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_AF_LISTEN,
1920 &p2p->status);
1921 }
1922 }
1923
1924 if (p2p->block_gon_req_tx) {
1925 /* if ack is true, supplicant will wait more time(100ms).
1926 * so we will return it as a success to get more time .
1927 */
1928 p2p->block_gon_req_tx = false;
1929 ack = true;
1930 }
1931
1932 clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status);
1933 /* if all done, turn mpc on again */
1934 if (config_af_params.mpc_onoff == 1)
1935 brcmf_set_mpc(ifp, 1);
1936
1937 return ack;
1938 }
1939
1940 /**
1941 * brcmf_p2p_notify_rx_mgmt_p2p_probereq() - Event handler for p2p probe req.
1942 *
1943 * @ifp: interface pointer for which event was received.
1944 * @e: even message.
1945 * @data: payload of event message (probe request).
1946 */
1947 s32 brcmf_p2p_notify_rx_mgmt_p2p_probereq(struct brcmf_if *ifp,
1948 const struct brcmf_event_msg *e,
1949 void *data)
1950 {
1951 struct brcmf_cfg80211_info *cfg = ifp->drvr->config;
1952 struct brcmf_p2p_info *p2p = &cfg->p2p;
1953 struct afx_hdl *afx_hdl = &p2p->afx_hdl;
1954 struct brcmf_cfg80211_vif *vif = ifp->vif;
1955 struct brcmf_rx_mgmt_data *rxframe = (struct brcmf_rx_mgmt_data *)data;
1956 struct brcmu_chan ch;
1957 u8 *mgmt_frame;
1958 u32 mgmt_frame_len;
1959 s32 freq;
1960 u16 mgmt_type;
1961
1962 brcmf_dbg(INFO, "Enter: event %d reason %d\n", e->event_code,
1963 e->reason);
1964
1965 if (e->datalen < sizeof(*rxframe)) {
1966 brcmf_dbg(SCAN, "Event data too small. Ignore\n");
1967 return 0;
1968 }
1969
1970 ch.chspec = be16_to_cpu(rxframe->chanspec);
1971 cfg->d11inf.decchspec(&ch);
1972
1973 if (test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status) &&
1974 (ether_addr_equal(afx_hdl->tx_dst_addr, e->addr))) {
1975 afx_hdl->peer_chan = ch.control_ch_num;
1976 brcmf_dbg(INFO, "PROBE REQUEST: Peer found, channel=%d\n",
1977 afx_hdl->peer_chan);
1978 complete(&afx_hdl->act_frm_scan);
1979 }
1980
1981 /* Firmware sends us two proberesponses for each idx one. At the */
1982 /* moment anything but bsscfgidx 0 is passed up to supplicant */
1983 if (e->bsscfgidx == 0)
1984 return 0;
1985
1986 /* Filter any P2P probe reqs arriving during the GO-NEG Phase */
1987 if (test_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status)) {
1988 brcmf_dbg(INFO, "Filtering P2P probe_req in GO-NEG phase\n");
1989 return 0;
1990 }
1991
1992 /* Check if wpa_supplicant has registered for this frame */
1993 brcmf_dbg(INFO, "vif->mgmt_rx_reg %04x\n", vif->mgmt_rx_reg);
1994 mgmt_type = (IEEE80211_STYPE_PROBE_REQ & IEEE80211_FCTL_STYPE) >> 4;
1995 if ((vif->mgmt_rx_reg & BIT(mgmt_type)) == 0)
1996 return 0;
1997
1998 mgmt_frame = (u8 *)(rxframe + 1);
1999 mgmt_frame_len = e->datalen - sizeof(*rxframe);
2000 freq = ieee80211_channel_to_frequency(ch.control_ch_num,
2001 ch.band == BRCMU_CHAN_BAND_2G ?
2002 NL80211_BAND_2GHZ :
2003 NL80211_BAND_5GHZ);
2004
2005 cfg80211_rx_mgmt(&vif->wdev, freq, 0, mgmt_frame, mgmt_frame_len, 0);
2006
2007 brcmf_dbg(INFO, "mgmt_frame_len (%d) , e->datalen (%d), chanspec (%04x), freq (%d)\n",
2008 mgmt_frame_len, e->datalen, ch.chspec, freq);
2009
2010 return 0;
2011 }
2012
2013
2014 /**
2015 * brcmf_p2p_get_current_chanspec() - Get current operation channel.
2016 *
2017 * @p2p: P2P specific data.
2018 * @chanspec: chanspec to be returned.
2019 */
2020 static void brcmf_p2p_get_current_chanspec(struct brcmf_p2p_info *p2p,
2021 u16 *chanspec)
2022 {
2023 struct brcmf_if *ifp;
2024 u8 mac_addr[ETH_ALEN];
2025 struct brcmu_chan ch;
2026 struct brcmf_bss_info_le *bi;
2027 u8 *buf;
2028
2029 ifp = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->ifp;
2030
2031 if (brcmf_fil_cmd_data_get(ifp, BRCMF_C_GET_BSSID, mac_addr,
2032 ETH_ALEN) == 0) {
2033 buf = kzalloc(WL_BSS_INFO_MAX, GFP_KERNEL);
2034 if (buf != NULL) {
2035 *(__le32 *)buf = cpu_to_le32(WL_BSS_INFO_MAX);
2036 if (brcmf_fil_cmd_data_get(ifp, BRCMF_C_GET_BSS_INFO,
2037 buf, WL_BSS_INFO_MAX) == 0) {
2038 bi = (struct brcmf_bss_info_le *)(buf + 4);
2039 *chanspec = le16_to_cpu(bi->chanspec);
2040 kfree(buf);
2041 return;
2042 }
2043 kfree(buf);
2044 }
2045 }
2046 /* Use default channel for P2P */
2047 ch.chnum = BRCMF_P2P_TEMP_CHAN;
2048 ch.bw = BRCMU_CHAN_BW_20;
2049 p2p->cfg->d11inf.encchspec(&ch);
2050 *chanspec = ch.chspec;
2051 }
2052
2053 /**
2054 * brcmf_p2p_ifchange - Change a P2P Role.
2055 * @cfg: driver private data for cfg80211 interface.
2056 * @if_type: interface type.
2057 * Returns 0 if success.
2058 */
2059 int brcmf_p2p_ifchange(struct brcmf_cfg80211_info *cfg,
2060 enum brcmf_fil_p2p_if_types if_type)
2061 {
2062 struct brcmf_p2p_info *p2p = &cfg->p2p;
2063 struct brcmf_pub *drvr = cfg->pub;
2064 struct brcmf_cfg80211_vif *vif;
2065 struct brcmf_fil_p2p_if_le if_request;
2066 s32 err;
2067 u16 chanspec;
2068
2069 brcmf_dbg(TRACE, "Enter\n");
2070
2071 vif = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif;
2072 if (!vif) {
2073 bphy_err(drvr, "vif for P2PAPI_BSSCFG_PRIMARY does not exist\n");
2074 return -EPERM;
2075 }
2076 brcmf_notify_escan_complete(cfg, vif->ifp, true, true);
2077 vif = p2p->bss_idx[P2PAPI_BSSCFG_CONNECTION].vif;
2078 if (!vif) {
2079 bphy_err(drvr, "vif for P2PAPI_BSSCFG_CONNECTION does not exist\n");
2080 return -EPERM;
2081 }
2082 brcmf_set_mpc(vif->ifp, 0);
2083
2084 /* In concurrency case, STA may be already associated in a particular */
2085 /* channel. so retrieve the current channel of primary interface and */
2086 /* then start the virtual interface on that. */
2087 brcmf_p2p_get_current_chanspec(p2p, &chanspec);
2088
2089 if_request.type = cpu_to_le16((u16)if_type);
2090 if_request.chspec = cpu_to_le16(chanspec);
2091 memcpy(if_request.addr, p2p->conn_int_addr, sizeof(if_request.addr));
2092
2093 brcmf_cfg80211_arm_vif_event(cfg, vif);
2094 err = brcmf_fil_iovar_data_set(vif->ifp, "p2p_ifupd", &if_request,
2095 sizeof(if_request));
2096 if (err) {
2097 bphy_err(drvr, "p2p_ifupd FAILED, err=%d\n", err);
2098 brcmf_cfg80211_arm_vif_event(cfg, NULL);
2099 return err;
2100 }
2101 err = brcmf_cfg80211_wait_vif_event(cfg, BRCMF_E_IF_CHANGE,
2102 BRCMF_VIF_EVENT_TIMEOUT);
2103 brcmf_cfg80211_arm_vif_event(cfg, NULL);
2104 if (!err) {
2105 bphy_err(drvr, "No BRCMF_E_IF_CHANGE event received\n");
2106 return -EIO;
2107 }
2108
2109 err = brcmf_fil_cmd_int_set(vif->ifp, BRCMF_C_SET_SCB_TIMEOUT,
2110 BRCMF_SCB_TIMEOUT_VALUE);
2111
2112 return err;
2113 }
2114
2115 static int brcmf_p2p_request_p2p_if(struct brcmf_p2p_info *p2p,
2116 struct brcmf_if *ifp, u8 ea[ETH_ALEN],
2117 enum brcmf_fil_p2p_if_types iftype)
2118 {
2119 struct brcmf_fil_p2p_if_le if_request;
2120 int err;
2121 u16 chanspec;
2122
2123 /* we need a default channel */
2124 brcmf_p2p_get_current_chanspec(p2p, &chanspec);
2125
2126 /* fill the firmware request */
2127 memcpy(if_request.addr, ea, ETH_ALEN);
2128 if_request.type = cpu_to_le16((u16)iftype);
2129 if_request.chspec = cpu_to_le16(chanspec);
2130
2131 err = brcmf_fil_iovar_data_set(ifp, "p2p_ifadd", &if_request,
2132 sizeof(if_request));
2133
2134 return err;
2135 }
2136
2137 static int brcmf_p2p_disable_p2p_if(struct brcmf_cfg80211_vif *vif)
2138 {
2139 struct brcmf_cfg80211_info *cfg = wdev_to_cfg(&vif->wdev);
2140 struct net_device *pri_ndev = cfg_to_ndev(cfg);
2141 struct brcmf_if *ifp = netdev_priv(pri_ndev);
2142 const u8 *addr = vif->wdev.netdev->dev_addr;
2143
2144 return brcmf_fil_iovar_data_set(ifp, "p2p_ifdis", addr, ETH_ALEN);
2145 }
2146
2147 static int brcmf_p2p_release_p2p_if(struct brcmf_cfg80211_vif *vif)
2148 {
2149 struct brcmf_cfg80211_info *cfg = wdev_to_cfg(&vif->wdev);
2150 struct net_device *pri_ndev = cfg_to_ndev(cfg);
2151 struct brcmf_if *ifp = netdev_priv(pri_ndev);
2152 const u8 *addr = vif->wdev.netdev->dev_addr;
2153
2154 return brcmf_fil_iovar_data_set(ifp, "p2p_ifdel", addr, ETH_ALEN);
2155 }
2156
2157 /**
2158 * brcmf_p2p_create_p2pdev() - create a P2P_DEVICE virtual interface.
2159 *
2160 * @p2p: P2P specific data.
2161 * @wiphy: wiphy device of new interface.
2162 * @addr: mac address for this new interface.
2163 */
2164 static struct wireless_dev *brcmf_p2p_create_p2pdev(struct brcmf_p2p_info *p2p,
2165 struct wiphy *wiphy,
2166 u8 *addr)
2167 {
2168 struct brcmf_pub *drvr = p2p->cfg->pub;
2169 struct brcmf_cfg80211_vif *p2p_vif;
2170 struct brcmf_if *p2p_ifp;
2171 struct brcmf_if *pri_ifp;
2172 int err;
2173 u32 bsscfgidx;
2174
2175 if (p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif)
2176 return ERR_PTR(-ENOSPC);
2177
2178 p2p_vif = brcmf_alloc_vif(p2p->cfg, NL80211_IFTYPE_P2P_DEVICE);
2179 if (IS_ERR(p2p_vif)) {
2180 bphy_err(drvr, "could not create discovery vif\n");
2181 return (struct wireless_dev *)p2p_vif;
2182 }
2183
2184 pri_ifp = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->ifp;
2185
2186 /* firmware requires unique mac address for p2pdev interface */
2187 if (addr && ether_addr_equal(addr, pri_ifp->mac_addr)) {
2188 bphy_err(drvr, "discovery vif must be different from primary interface\n");
2189 err = -EINVAL;
2190 goto fail;
2191 }
2192
2193 brcmf_p2p_generate_bss_mac(p2p, addr);
2194 brcmf_p2p_set_firmware(pri_ifp, p2p->dev_addr);
2195
2196 brcmf_cfg80211_arm_vif_event(p2p->cfg, p2p_vif);
2197 brcmf_fweh_p2pdev_setup(pri_ifp, true);
2198
2199 /* Initialize P2P Discovery in the firmware */
2200 err = brcmf_fil_iovar_int_set(pri_ifp, "p2p_disc", 1);
2201 if (err < 0) {
2202 bphy_err(drvr, "set p2p_disc error\n");
2203 brcmf_fweh_p2pdev_setup(pri_ifp, false);
2204 brcmf_cfg80211_arm_vif_event(p2p->cfg, NULL);
2205 goto fail;
2206 }
2207
2208 /* wait for firmware event */
2209 err = brcmf_cfg80211_wait_vif_event(p2p->cfg, BRCMF_E_IF_ADD,
2210 BRCMF_VIF_EVENT_TIMEOUT);
2211 brcmf_cfg80211_arm_vif_event(p2p->cfg, NULL);
2212 brcmf_fweh_p2pdev_setup(pri_ifp, false);
2213 if (!err) {
2214 bphy_err(drvr, "timeout occurred\n");
2215 err = -EIO;
2216 goto fail;
2217 }
2218
2219 /* discovery interface created */
2220 p2p_ifp = p2p_vif->ifp;
2221 p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif = p2p_vif;
2222 memcpy(p2p_ifp->mac_addr, p2p->dev_addr, ETH_ALEN);
2223 memcpy(&p2p_vif->wdev.address, p2p->dev_addr, sizeof(p2p->dev_addr));
2224
2225 /* verify bsscfg index for P2P discovery */
2226 err = brcmf_fil_iovar_int_get(pri_ifp, "p2p_dev", &bsscfgidx);
2227 if (err < 0) {
2228 bphy_err(drvr, "retrieving discover bsscfg index failed\n");
2229 goto fail;
2230 }
2231
2232 WARN_ON(p2p_ifp->bsscfgidx != bsscfgidx);
2233
2234 INIT_WORK(&p2p->afx_hdl.afx_work, brcmf_p2p_afx_handler);
2235 init_completion(&p2p->afx_hdl.act_frm_scan);
2236 init_completion(&p2p->wait_next_af);
2237
2238 return &p2p_vif->wdev;
2239
2240 fail:
2241 brcmf_free_vif(p2p_vif);
2242 return ERR_PTR(err);
2243 }
2244
2245 static int brcmf_p2p_get_conn_idx(struct brcmf_cfg80211_info *cfg)
2246 {
2247 int i;
2248 struct brcmf_if *ifp = netdev_priv(cfg_to_ndev(cfg));
2249
2250 if (!ifp)
2251 return -ENODEV;
2252
2253 for (i = P2PAPI_BSSCFG_CONNECTION; i < P2PAPI_BSSCFG_MAX; i++) {
2254 if (!cfg->p2p.bss_idx[i].vif) {
2255 if (i == P2PAPI_BSSCFG_CONNECTION2 &&
2256 !(brcmf_feat_is_enabled(ifp, BRCMF_FEAT_RSDB))) {
2257 brcmf_err("Multi p2p not supported");
2258 return -EIO;
2259 }
2260 return i;
2261 }
2262 }
2263 return -EIO;
2264 }
2265
2266 /**
2267 * brcmf_p2p_add_vif() - create a new P2P virtual interface.
2268 *
2269 * @wiphy: wiphy device of new interface.
2270 * @name: name of the new interface.
2271 * @name_assign_type: origin of the interface name
2272 * @type: nl80211 interface type.
2273 * @params: contains mac address for P2P device.
2274 */
2275 struct wireless_dev *brcmf_p2p_add_vif(struct wiphy *wiphy, const char *name,
2276 unsigned char name_assign_type,
2277 enum nl80211_iftype type,
2278 struct vif_params *params)
2279 {
2280 struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
2281 struct brcmf_if *ifp = netdev_priv(cfg_to_ndev(cfg));
2282 struct brcmf_pub *drvr = cfg->pub;
2283 struct brcmf_cfg80211_vif *vif;
2284 enum brcmf_fil_p2p_if_types iftype;
2285 int err = 0;
2286 int connidx;
2287 u8 *p2p_intf_addr;
2288
2289 if (brcmf_cfg80211_vif_event_armed(cfg))
2290 return ERR_PTR(-EBUSY);
2291
2292 brcmf_dbg(INFO, "adding vif \"%s\" (type=%d)\n", name, type);
2293
2294 switch (type) {
2295 case NL80211_IFTYPE_P2P_CLIENT:
2296 iftype = BRCMF_FIL_P2P_IF_CLIENT;
2297 break;
2298 case NL80211_IFTYPE_P2P_GO:
2299 iftype = BRCMF_FIL_P2P_IF_GO;
2300 break;
2301 case NL80211_IFTYPE_P2P_DEVICE:
2302 return brcmf_p2p_create_p2pdev(&cfg->p2p, wiphy,
2303 params->macaddr);
2304 default:
2305 return ERR_PTR(-EOPNOTSUPP);
2306 }
2307
2308 vif = brcmf_alloc_vif(cfg, type);
2309 if (IS_ERR(vif))
2310 return (struct wireless_dev *)vif;
2311 brcmf_cfg80211_arm_vif_event(cfg, vif);
2312
2313 connidx = brcmf_p2p_get_conn_idx(cfg);
2314
2315 if (connidx == P2PAPI_BSSCFG_CONNECTION)
2316 p2p_intf_addr = cfg->p2p.conn_int_addr;
2317 else if (connidx == P2PAPI_BSSCFG_CONNECTION2)
2318 p2p_intf_addr = cfg->p2p.conn2_int_addr;
2319 else
2320 err = -EINVAL;
2321
2322 if (!err)
2323 err = brcmf_p2p_request_p2p_if(&cfg->p2p, ifp,
2324 p2p_intf_addr, iftype);
2325
2326 if (err) {
2327 brcmf_err("request p2p interface failed\n");
2328 brcmf_cfg80211_arm_vif_event(cfg, NULL);
2329 goto fail;
2330 }
2331
2332 /* wait for firmware event */
2333 err = brcmf_cfg80211_wait_vif_event(cfg, BRCMF_E_IF_ADD,
2334 BRCMF_VIF_EVENT_TIMEOUT);
2335 brcmf_cfg80211_arm_vif_event(cfg, NULL);
2336 if (!err) {
2337 bphy_err(drvr, "timeout occurred\n");
2338 err = -EIO;
2339 goto fail;
2340 }
2341
2342 /* interface created in firmware */
2343 ifp = vif->ifp;
2344 if (!ifp) {
2345 bphy_err(drvr, "no if pointer provided\n");
2346 err = -ENOENT;
2347 goto fail;
2348 }
2349
2350 strscpy(ifp->ndev->name, name, sizeof(ifp->ndev->name));
2351 ifp->ndev->name_assign_type = name_assign_type;
2352 err = brcmf_net_attach(ifp, true);
2353 if (err) {
2354 bphy_err(drvr, "Registering netdevice failed\n");
2355 free_netdev(ifp->ndev);
2356 goto fail;
2357 }
2358
2359 cfg->p2p.bss_idx[connidx].vif = vif;
2360 /* Disable firmware roaming for P2P interface */
2361 brcmf_fil_iovar_int_set(ifp, "roam_off", 1);
2362 if (iftype == BRCMF_FIL_P2P_IF_GO) {
2363 /* set station timeout for p2p */
2364 brcmf_fil_cmd_int_set(ifp, BRCMF_C_SET_SCB_TIMEOUT,
2365 BRCMF_SCB_TIMEOUT_VALUE);
2366 }
2367 return &ifp->vif->wdev;
2368
2369 fail:
2370 brcmf_free_vif(vif);
2371 return ERR_PTR(err);
2372 }
2373
2374 /**
2375 * brcmf_p2p_del_vif() - delete a P2P virtual interface.
2376 *
2377 * @wiphy: wiphy device of interface.
2378 * @wdev: wireless device of interface.
2379 */
2380 int brcmf_p2p_del_vif(struct wiphy *wiphy, struct wireless_dev *wdev)
2381 {
2382 struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
2383 struct brcmf_p2p_info *p2p = &cfg->p2p;
2384 struct brcmf_cfg80211_vif *vif;
2385 enum nl80211_iftype iftype;
2386 bool wait_for_disable = false;
2387 int err;
2388
2389 brcmf_dbg(TRACE, "delete P2P vif\n");
2390 vif = container_of(wdev, struct brcmf_cfg80211_vif, wdev);
2391
2392 iftype = vif->wdev.iftype;
2393 brcmf_cfg80211_arm_vif_event(cfg, vif);
2394 switch (iftype) {
2395 case NL80211_IFTYPE_P2P_CLIENT:
2396 if (test_bit(BRCMF_VIF_STATUS_DISCONNECTING, &vif->sme_state))
2397 wait_for_disable = true;
2398 break;
2399
2400 case NL80211_IFTYPE_P2P_GO:
2401 if (!brcmf_p2p_disable_p2p_if(vif))
2402 wait_for_disable = true;
2403 break;
2404
2405 case NL80211_IFTYPE_P2P_DEVICE:
2406 if (!p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif)
2407 return 0;
2408 brcmf_p2p_cancel_remain_on_channel(vif->ifp);
2409 brcmf_p2p_deinit_discovery(p2p);
2410 break;
2411
2412 default:
2413 return -ENOTSUPP;
2414 }
2415
2416 clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status);
2417 brcmf_dbg(INFO, "P2P: GO_NEG_PHASE status cleared\n");
2418
2419 if (wait_for_disable)
2420 wait_for_completion_timeout(&cfg->vif_disabled,
2421 BRCMF_P2P_DISABLE_TIMEOUT);
2422
2423 err = 0;
2424 if (iftype != NL80211_IFTYPE_P2P_DEVICE) {
2425 brcmf_vif_clear_mgmt_ies(vif);
2426 err = brcmf_p2p_release_p2p_if(vif);
2427 }
2428 if (!err) {
2429 /* wait for firmware event */
2430 err = brcmf_cfg80211_wait_vif_event(cfg, BRCMF_E_IF_DEL,
2431 BRCMF_VIF_EVENT_TIMEOUT);
2432 if (!err)
2433 err = -EIO;
2434 else
2435 err = 0;
2436 }
2437 brcmf_remove_interface(vif->ifp, true);
2438
2439 brcmf_cfg80211_arm_vif_event(cfg, NULL);
2440 if (iftype != NL80211_IFTYPE_P2P_DEVICE) {
2441 if (vif == p2p->bss_idx[P2PAPI_BSSCFG_CONNECTION].vif)
2442 p2p->bss_idx[P2PAPI_BSSCFG_CONNECTION].vif = NULL;
2443 if (vif == p2p->bss_idx[P2PAPI_BSSCFG_CONNECTION2].vif)
2444 p2p->bss_idx[P2PAPI_BSSCFG_CONNECTION2].vif = NULL;
2445 }
2446
2447 return err;
2448 }
2449
2450 void brcmf_p2p_ifp_removed(struct brcmf_if *ifp, bool locked)
2451 {
2452 struct brcmf_cfg80211_info *cfg;
2453 struct brcmf_cfg80211_vif *vif;
2454
2455 brcmf_dbg(INFO, "P2P: device interface removed\n");
2456 vif = ifp->vif;
2457 cfg = wdev_to_cfg(&vif->wdev);
2458 cfg->p2p.bss_idx[P2PAPI_BSSCFG_DEVICE].vif = NULL;
2459 if (!locked) {
2460 rtnl_lock();
2461 wiphy_lock(cfg->wiphy);
2462 cfg80211_unregister_wdev(&vif->wdev);
2463 wiphy_unlock(cfg->wiphy);
2464 rtnl_unlock();
2465 } else {
2466 cfg80211_unregister_wdev(&vif->wdev);
2467 }
2468 brcmf_free_vif(vif);
2469 }
2470
2471 int brcmf_p2p_start_device(struct wiphy *wiphy, struct wireless_dev *wdev)
2472 {
2473 struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
2474 struct brcmf_p2p_info *p2p = &cfg->p2p;
2475 struct brcmf_cfg80211_vif *vif;
2476 int err;
2477
2478 vif = container_of(wdev, struct brcmf_cfg80211_vif, wdev);
2479 mutex_lock(&cfg->usr_sync);
2480 err = brcmf_p2p_enable_discovery(p2p);
2481 if (!err)
2482 set_bit(BRCMF_VIF_STATUS_READY, &vif->sme_state);
2483 mutex_unlock(&cfg->usr_sync);
2484 return err;
2485 }
2486
2487 void brcmf_p2p_stop_device(struct wiphy *wiphy, struct wireless_dev *wdev)
2488 {
2489 struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
2490 struct brcmf_p2p_info *p2p = &cfg->p2p;
2491 struct brcmf_cfg80211_vif *vif;
2492
2493 vif = container_of(wdev, struct brcmf_cfg80211_vif, wdev);
2494 /* This call can be result of the unregister_wdev call. In that case
2495 * we dont want to do anything anymore. Just return. The config vif
2496 * will have been cleared at this point.
2497 */
2498 if (p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif == vif) {
2499 mutex_lock(&cfg->usr_sync);
2500 /* Set the discovery state to SCAN */
2501 (void)brcmf_p2p_set_discover_state(vif->ifp,
2502 WL_P2P_DISC_ST_SCAN, 0, 0);
2503 brcmf_abort_scanning(cfg);
2504 clear_bit(BRCMF_VIF_STATUS_READY, &vif->sme_state);
2505 mutex_unlock(&cfg->usr_sync);
2506 }
2507 }
2508
2509 /**
2510 * brcmf_p2p_attach() - attach for P2P.
2511 *
2512 * @cfg: driver private data for cfg80211 interface.
2513 * @p2pdev_forced: create p2p device interface at attach.
2514 */
2515 s32 brcmf_p2p_attach(struct brcmf_cfg80211_info *cfg, bool p2pdev_forced)
2516 {
2517 struct brcmf_pub *drvr = cfg->pub;
2518 struct brcmf_p2p_info *p2p;
2519 struct brcmf_if *pri_ifp;
2520 s32 err = 0;
2521 void *err_ptr;
2522
2523 p2p = &cfg->p2p;
2524 p2p->cfg = cfg;
2525
2526 pri_ifp = brcmf_get_ifp(cfg->pub, 0);
2527 p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif = pri_ifp->vif;
2528
2529 init_completion(&p2p->send_af_done);
2530
2531 if (p2pdev_forced) {
2532 err_ptr = brcmf_p2p_create_p2pdev(p2p, NULL, NULL);
2533 if (IS_ERR(err_ptr)) {
2534 bphy_err(drvr, "P2P device creation failed.\n");
2535 err = PTR_ERR(err_ptr);
2536 }
2537 } else {
2538 p2p->p2pdev_dynamically = true;
2539 }
2540 return err;
2541 }
2542
2543 /**
2544 * brcmf_p2p_detach() - detach P2P.
2545 *
2546 * @p2p: P2P specific data.
2547 */
2548 void brcmf_p2p_detach(struct brcmf_p2p_info *p2p)
2549 {
2550 struct brcmf_cfg80211_vif *vif;
2551
2552 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif;
2553 if (vif != NULL) {
2554 brcmf_p2p_cancel_remain_on_channel(vif->ifp);
2555 brcmf_p2p_deinit_discovery(p2p);
2556 brcmf_remove_interface(vif->ifp, false);
2557 }
2558 /* just set it all to zero */
2559 memset(p2p, 0, sizeof(*p2p));
2560 }
2561
2562