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
11 #include <brcmu_wifi.h>
12 #include <brcmu_utils.h>
13 #include <defs.h>
14 #include "core.h"
15 #include "debug.h"
16 #include "fwil.h"
17 #include "fwil_types.h"
18 #include "p2p.h"
19 #include "cfg80211.h"
20 #include "feature.h"
21
22 /* parameters used for p2p escan */
23 #define P2PAPI_SCAN_NPROBES 1
24 #define P2PAPI_SCAN_DWELL_TIME_MS 80
25 #define P2PAPI_SCAN_SOCIAL_DWELL_TIME_MS 40
26 #define P2PAPI_SCAN_HOME_TIME_MS 60
27 #define P2PAPI_SCAN_NPROBS_TIME_MS 30
28 #define P2PAPI_SCAN_AF_SEARCH_DWELL_TIME_MS 100
29 #define WL_SCAN_CONNECT_DWELL_TIME_MS 200
30 #define WL_SCAN_JOIN_PROBE_INTERVAL_MS 20
31
32 #define BRCMF_P2P_WILDCARD_SSID "DIRECT-"
33 #define BRCMF_P2P_WILDCARD_SSID_LEN (sizeof(BRCMF_P2P_WILDCARD_SSID) - 1)
34
35 #define SOCIAL_CHAN_1 1
36 #define SOCIAL_CHAN_2 6
37 #define SOCIAL_CHAN_3 11
38 #define IS_P2P_SOCIAL_CHANNEL(channel) ((channel == SOCIAL_CHAN_1) || \
39 (channel == SOCIAL_CHAN_2) || \
40 (channel == SOCIAL_CHAN_3))
41 #define BRCMF_P2P_TEMP_CHAN SOCIAL_CHAN_3
42 #define SOCIAL_CHAN_CNT 3
43 #define AF_PEER_SEARCH_CNT 2
44
45 #define BRCMF_SCB_TIMEOUT_VALUE 20
46
47 #define P2P_VER 9 /* P2P version: 9=WiFi P2P v1.0 */
48 #define P2P_PUB_AF_CATEGORY 0x04
49 #define P2P_PUB_AF_ACTION 0x09
50 #define P2P_AF_CATEGORY 0x7f
51 #define P2P_OUI "\x50\x6F\x9A" /* P2P OUI */
52 #define P2P_OUI_LEN 3 /* P2P OUI length */
53
54 /* Action Frame Constants */
55 #define DOT11_ACTION_HDR_LEN 2 /* action frame category + action */
56 #define DOT11_ACTION_CAT_OFF 0 /* category offset */
57 #define DOT11_ACTION_ACT_OFF 1 /* action offset */
58
59 #define P2P_AF_DWELL_TIME 200
60 #define P2P_AF_MIN_DWELL_TIME 100
61 #define P2P_AF_MED_DWELL_TIME 400
62 #define P2P_AF_LONG_DWELL_TIME 1000
63 #define P2P_AF_TX_MAX_RETRY 5
64 #define P2P_AF_MAX_WAIT_TIME msecs_to_jiffies(2000)
65 #define P2P_INVALID_CHANNEL -1
66 #define P2P_CHANNEL_SYNC_RETRY 5
67 #define P2P_AF_FRM_SCAN_MAX_WAIT msecs_to_jiffies(450)
68 #define P2P_DEFAULT_SLEEP_TIME_VSDB 200
69 #define P2P_AF_RETRY_DELAY_TIME 40
70
71 /* WiFi P2P Public Action Frame OUI Subtypes */
72 #define P2P_PAF_GON_REQ 0 /* Group Owner Negotiation Req */
73 #define P2P_PAF_GON_RSP 1 /* Group Owner Negotiation Rsp */
74 #define P2P_PAF_GON_CONF 2 /* Group Owner Negotiation Confirm */
75 #define P2P_PAF_INVITE_REQ 3 /* P2P Invitation Request */
76 #define P2P_PAF_INVITE_RSP 4 /* P2P Invitation Response */
77 #define P2P_PAF_DEVDIS_REQ 5 /* Device Discoverability Request */
78 #define P2P_PAF_DEVDIS_RSP 6 /* Device Discoverability Response */
79 #define P2P_PAF_PROVDIS_REQ 7 /* Provision Discovery Request */
80 #define P2P_PAF_PROVDIS_RSP 8 /* Provision Discovery Response */
81 #define P2P_PAF_SUBTYPE_INVALID 255 /* Invalid Subtype */
82
83 /* WiFi P2P Action Frame OUI Subtypes */
84 #define P2P_AF_NOTICE_OF_ABSENCE 0 /* Notice of Absence */
85 #define P2P_AF_PRESENCE_REQ 1 /* P2P Presence Request */
86 #define P2P_AF_PRESENCE_RSP 2 /* P2P Presence Response */
87 #define P2P_AF_GO_DISC_REQ 3 /* GO Discoverability Request */
88
89 /* P2P Service Discovery related */
90 #define P2PSD_ACTION_CATEGORY 0x04 /* Public action frame */
91 #define P2PSD_ACTION_ID_GAS_IREQ 0x0a /* GAS Initial Request AF */
92 #define P2PSD_ACTION_ID_GAS_IRESP 0x0b /* GAS Initial Response AF */
93 #define P2PSD_ACTION_ID_GAS_CREQ 0x0c /* GAS Comeback Request AF */
94 #define P2PSD_ACTION_ID_GAS_CRESP 0x0d /* GAS Comeback Response AF */
95
96 #define BRCMF_P2P_DISABLE_TIMEOUT msecs_to_jiffies(500)
97
98 /* Mask for retry counter of custom dwell time */
99 #define CUSTOM_RETRY_MASK 0xff000000
100 /**
101 * struct brcmf_p2p_disc_st_le - set discovery state in firmware.
102 *
103 * @state: requested discovery state (see enum brcmf_p2p_disc_state).
104 * @chspec: channel parameter for %WL_P2P_DISC_ST_LISTEN state.
105 * @dwell: dwell time in ms for %WL_P2P_DISC_ST_LISTEN state.
106 */
107 struct brcmf_p2p_disc_st_le {
108 u8 state;
109 __le16 chspec;
110 __le16 dwell;
111 };
112
113 /**
114 * enum brcmf_p2p_disc_state - P2P discovery state values
115 *
116 * @WL_P2P_DISC_ST_SCAN: P2P discovery with wildcard SSID and P2P IE.
117 * @WL_P2P_DISC_ST_LISTEN: P2P discovery off-channel for specified time.
118 * @WL_P2P_DISC_ST_SEARCH: P2P discovery with P2P wildcard SSID and P2P IE.
119 */
120 enum brcmf_p2p_disc_state {
121 WL_P2P_DISC_ST_SCAN,
122 WL_P2P_DISC_ST_LISTEN,
123 WL_P2P_DISC_ST_SEARCH
124 };
125
126 /**
127 * struct brcmf_p2p_scan_le - P2P specific scan request.
128 *
129 * @type: type of scan method requested (values: 'E' or 'S').
130 * @reserved: reserved (ignored).
131 * @eparams: parameters used for type 'E'.
132 * @sparams: parameters used for type 'S'.
133 */
134 struct brcmf_p2p_scan_le {
135 u8 type;
136 u8 reserved[3];
137 union {
138 struct brcmf_escan_params_le eparams;
139 struct brcmf_scan_params_le sparams;
140 };
141 };
142
143 /**
144 * struct brcmf_p2p_pub_act_frame - WiFi P2P Public Action Frame
145 *
146 * @category: P2P_PUB_AF_CATEGORY
147 * @action: P2P_PUB_AF_ACTION
148 * @oui: P2P_OUI
149 * @oui_type: OUI type - P2P_VER
150 * @subtype: OUI subtype - P2P_TYPE_*
151 * @dialog_token: nonzero, identifies req/rsp transaction
152 * @elts: Variable length information elements.
153 */
154 struct brcmf_p2p_pub_act_frame {
155 u8 category;
156 u8 action;
157 u8 oui[3];
158 u8 oui_type;
159 u8 subtype;
160 u8 dialog_token;
161 u8 elts[];
162 };
163
164 /**
165 * struct brcmf_p2p_action_frame - WiFi P2P Action Frame
166 *
167 * @category: P2P_AF_CATEGORY
168 * @oui: OUI - P2P_OUI
169 * @type: OUI Type - P2P_VER
170 * @subtype: OUI Subtype - P2P_AF_*
171 * @dialog_token: nonzero, identifies req/resp tranaction
172 * @elts: Variable length information elements.
173 */
174 struct brcmf_p2p_action_frame {
175 u8 category;
176 u8 oui[3];
177 u8 type;
178 u8 subtype;
179 u8 dialog_token;
180 u8 elts[];
181 };
182
183 /**
184 * struct brcmf_p2psd_gas_pub_act_frame - Wi-Fi GAS Public Action Frame
185 *
186 * @category: 0x04 Public Action Frame
187 * @action: 0x6c Advertisement Protocol
188 * @dialog_token: nonzero, identifies req/rsp transaction
189 * @query_data: Query Data. SD gas ireq SD gas iresp
190 */
191 struct brcmf_p2psd_gas_pub_act_frame {
192 u8 category;
193 u8 action;
194 u8 dialog_token;
195 u8 query_data[];
196 };
197
198 /**
199 * struct brcmf_config_af_params - Action Frame Parameters for tx.
200 *
201 * @mpc_onoff: To make sure to send successfully action frame, we have to
202 * turn off mpc 0: off, 1: on, (-1): do nothing
203 * @search_channel: 1: search peer's channel to send af
204 * @extra_listen: keep the dwell time to get af response frame.
205 */
206 struct brcmf_config_af_params {
207 s32 mpc_onoff;
208 bool search_channel;
209 bool extra_listen;
210 };
211
212 /**
213 * brcmf_p2p_is_pub_action() - true if p2p public type frame.
214 *
215 * @frame: action frame data.
216 * @frame_len: length of action frame data.
217 *
218 * Determine if action frame is p2p public action type
219 */
brcmf_p2p_is_pub_action(void * frame,u32 frame_len)220 static bool brcmf_p2p_is_pub_action(void *frame, u32 frame_len)
221 {
222 struct brcmf_p2p_pub_act_frame *pact_frm;
223
224 if (frame == NULL)
225 return false;
226
227 pact_frm = (struct brcmf_p2p_pub_act_frame *)frame;
228 if (frame_len < sizeof(*pact_frm))
229 return false;
230
231 if (pact_frm->category == P2P_PUB_AF_CATEGORY &&
232 pact_frm->action == P2P_PUB_AF_ACTION &&
233 pact_frm->oui_type == P2P_VER &&
234 memcmp(pact_frm->oui, P2P_OUI, P2P_OUI_LEN) == 0)
235 return true;
236
237 return false;
238 }
239
240 /**
241 * brcmf_p2p_is_p2p_action() - true if p2p action type frame.
242 *
243 * @frame: action frame data.
244 * @frame_len: length of action frame data.
245 *
246 * Determine if action frame is p2p action type
247 */
brcmf_p2p_is_p2p_action(void * frame,u32 frame_len)248 static bool brcmf_p2p_is_p2p_action(void *frame, u32 frame_len)
249 {
250 struct brcmf_p2p_action_frame *act_frm;
251
252 if (frame == NULL)
253 return false;
254
255 act_frm = (struct brcmf_p2p_action_frame *)frame;
256 if (frame_len < sizeof(*act_frm))
257 return false;
258
259 if (act_frm->category == P2P_AF_CATEGORY &&
260 act_frm->type == P2P_VER &&
261 memcmp(act_frm->oui, P2P_OUI, P2P_OUI_LEN) == 0)
262 return true;
263
264 return false;
265 }
266
267 /**
268 * brcmf_p2p_is_gas_action() - true if p2p gas action type frame.
269 *
270 * @frame: action frame data.
271 * @frame_len: length of action frame data.
272 *
273 * Determine if action frame is p2p gas action type
274 */
brcmf_p2p_is_gas_action(void * frame,u32 frame_len)275 static bool brcmf_p2p_is_gas_action(void *frame, u32 frame_len)
276 {
277 struct brcmf_p2psd_gas_pub_act_frame *sd_act_frm;
278
279 if (frame == NULL)
280 return false;
281
282 sd_act_frm = (struct brcmf_p2psd_gas_pub_act_frame *)frame;
283 if (frame_len < sizeof(*sd_act_frm))
284 return false;
285
286 if (sd_act_frm->category != P2PSD_ACTION_CATEGORY)
287 return false;
288
289 if (sd_act_frm->action == P2PSD_ACTION_ID_GAS_IREQ ||
290 sd_act_frm->action == P2PSD_ACTION_ID_GAS_IRESP ||
291 sd_act_frm->action == P2PSD_ACTION_ID_GAS_CREQ ||
292 sd_act_frm->action == P2PSD_ACTION_ID_GAS_CRESP)
293 return true;
294
295 return false;
296 }
297
298 /**
299 * brcmf_p2p_print_actframe() - debug print routine.
300 *
301 * @tx: Received or to be transmitted
302 * @frame: action frame data.
303 * @frame_len: length of action frame data.
304 *
305 * Print information about the p2p action frame
306 */
307
308 #ifdef DEBUG
309
brcmf_p2p_print_actframe(bool tx,void * frame,u32 frame_len)310 static void brcmf_p2p_print_actframe(bool tx, void *frame, u32 frame_len)
311 {
312 struct brcmf_p2p_pub_act_frame *pact_frm;
313 struct brcmf_p2p_action_frame *act_frm;
314 struct brcmf_p2psd_gas_pub_act_frame *sd_act_frm;
315
316 if (!frame || frame_len <= 2)
317 return;
318
319 if (brcmf_p2p_is_pub_action(frame, frame_len)) {
320 pact_frm = (struct brcmf_p2p_pub_act_frame *)frame;
321 switch (pact_frm->subtype) {
322 case P2P_PAF_GON_REQ:
323 brcmf_dbg(TRACE, "%s P2P Group Owner Negotiation Req Frame\n",
324 (tx) ? "TX" : "RX");
325 break;
326 case P2P_PAF_GON_RSP:
327 brcmf_dbg(TRACE, "%s P2P Group Owner Negotiation Rsp Frame\n",
328 (tx) ? "TX" : "RX");
329 break;
330 case P2P_PAF_GON_CONF:
331 brcmf_dbg(TRACE, "%s P2P Group Owner Negotiation Confirm Frame\n",
332 (tx) ? "TX" : "RX");
333 break;
334 case P2P_PAF_INVITE_REQ:
335 brcmf_dbg(TRACE, "%s P2P Invitation Request Frame\n",
336 (tx) ? "TX" : "RX");
337 break;
338 case P2P_PAF_INVITE_RSP:
339 brcmf_dbg(TRACE, "%s P2P Invitation Response Frame\n",
340 (tx) ? "TX" : "RX");
341 break;
342 case P2P_PAF_DEVDIS_REQ:
343 brcmf_dbg(TRACE, "%s P2P Device Discoverability Request Frame\n",
344 (tx) ? "TX" : "RX");
345 break;
346 case P2P_PAF_DEVDIS_RSP:
347 brcmf_dbg(TRACE, "%s P2P Device Discoverability Response Frame\n",
348 (tx) ? "TX" : "RX");
349 break;
350 case P2P_PAF_PROVDIS_REQ:
351 brcmf_dbg(TRACE, "%s P2P Provision Discovery Request Frame\n",
352 (tx) ? "TX" : "RX");
353 break;
354 case P2P_PAF_PROVDIS_RSP:
355 brcmf_dbg(TRACE, "%s P2P Provision Discovery Response Frame\n",
356 (tx) ? "TX" : "RX");
357 break;
358 default:
359 brcmf_dbg(TRACE, "%s Unknown P2P Public Action Frame\n",
360 (tx) ? "TX" : "RX");
361 break;
362 }
363 } else if (brcmf_p2p_is_p2p_action(frame, frame_len)) {
364 act_frm = (struct brcmf_p2p_action_frame *)frame;
365 switch (act_frm->subtype) {
366 case P2P_AF_NOTICE_OF_ABSENCE:
367 brcmf_dbg(TRACE, "%s P2P Notice of Absence Frame\n",
368 (tx) ? "TX" : "RX");
369 break;
370 case P2P_AF_PRESENCE_REQ:
371 brcmf_dbg(TRACE, "%s P2P Presence Request Frame\n",
372 (tx) ? "TX" : "RX");
373 break;
374 case P2P_AF_PRESENCE_RSP:
375 brcmf_dbg(TRACE, "%s P2P Presence Response Frame\n",
376 (tx) ? "TX" : "RX");
377 break;
378 case P2P_AF_GO_DISC_REQ:
379 brcmf_dbg(TRACE, "%s P2P Discoverability Request Frame\n",
380 (tx) ? "TX" : "RX");
381 break;
382 default:
383 brcmf_dbg(TRACE, "%s Unknown P2P Action Frame\n",
384 (tx) ? "TX" : "RX");
385 }
386
387 } else if (brcmf_p2p_is_gas_action(frame, frame_len)) {
388 sd_act_frm = (struct brcmf_p2psd_gas_pub_act_frame *)frame;
389 switch (sd_act_frm->action) {
390 case P2PSD_ACTION_ID_GAS_IREQ:
391 brcmf_dbg(TRACE, "%s P2P GAS Initial Request\n",
392 (tx) ? "TX" : "RX");
393 break;
394 case P2PSD_ACTION_ID_GAS_IRESP:
395 brcmf_dbg(TRACE, "%s P2P GAS Initial Response\n",
396 (tx) ? "TX" : "RX");
397 break;
398 case P2PSD_ACTION_ID_GAS_CREQ:
399 brcmf_dbg(TRACE, "%s P2P GAS Comeback Request\n",
400 (tx) ? "TX" : "RX");
401 break;
402 case P2PSD_ACTION_ID_GAS_CRESP:
403 brcmf_dbg(TRACE, "%s P2P GAS Comeback Response\n",
404 (tx) ? "TX" : "RX");
405 break;
406 default:
407 brcmf_dbg(TRACE, "%s Unknown P2P GAS Frame\n",
408 (tx) ? "TX" : "RX");
409 break;
410 }
411 }
412 }
413
414 #else
415
brcmf_p2p_print_actframe(bool tx,void * frame,u32 frame_len)416 static void brcmf_p2p_print_actframe(bool tx, void *frame, u32 frame_len)
417 {
418 }
419
420 #endif
421
422
423 /**
424 * brcmf_p2p_set_firmware() - prepare firmware for peer-to-peer operation.
425 *
426 * @ifp: ifp to use for iovars (primary).
427 * @p2p_mac: mac address to configure for p2p_da_override
428 */
brcmf_p2p_set_firmware(struct brcmf_if * ifp,u8 * p2p_mac)429 static int brcmf_p2p_set_firmware(struct brcmf_if *ifp, u8 *p2p_mac)
430 {
431 struct brcmf_pub *drvr = ifp->drvr;
432 s32 ret = 0;
433
434 brcmf_fil_cmd_int_set(ifp, BRCMF_C_DOWN, 1);
435 brcmf_fil_iovar_int_set(ifp, "apsta", 1);
436 brcmf_fil_cmd_int_set(ifp, BRCMF_C_UP, 1);
437
438 /* In case of COB type, firmware has default mac address
439 * After Initializing firmware, we have to set current mac address to
440 * firmware for P2P device address. This must be done with discovery
441 * disabled.
442 */
443 brcmf_fil_iovar_int_set(ifp, "p2p_disc", 0);
444
445 ret = brcmf_fil_iovar_data_set(ifp, "p2p_da_override", p2p_mac,
446 ETH_ALEN);
447 if (ret)
448 bphy_err(drvr, "failed to update device address ret %d\n", ret);
449
450 return ret;
451 }
452
453 /**
454 * brcmf_p2p_generate_bss_mac() - derive mac addresses for P2P.
455 *
456 * @p2p: P2P specific data.
457 * @dev_addr: optional device address.
458 *
459 * P2P needs mac addresses for P2P device and interface. If no device
460 * address it specified, these are derived from a random ethernet
461 * address.
462 */
brcmf_p2p_generate_bss_mac(struct brcmf_p2p_info * p2p,u8 * dev_addr)463 static void brcmf_p2p_generate_bss_mac(struct brcmf_p2p_info *p2p, u8 *dev_addr)
464 {
465 struct brcmf_if *pri_ifp = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->ifp;
466 bool random_addr = false;
467 bool local_admin = false;
468
469 if (!dev_addr || is_zero_ether_addr(dev_addr)) {
470 /* If the primary interface address is already locally
471 * administered, create a new random address.
472 */
473 if (pri_ifp->mac_addr[0] & 0x02) {
474 random_addr = true;
475 } else {
476 dev_addr = pri_ifp->mac_addr;
477 local_admin = true;
478 }
479 }
480
481 /* Generate the P2P Device Address obtaining a random ethernet
482 * address with the locally administered bit set.
483 */
484 if (random_addr)
485 eth_random_addr(p2p->dev_addr);
486 else
487 memcpy(p2p->dev_addr, dev_addr, ETH_ALEN);
488
489 if (local_admin)
490 p2p->dev_addr[0] |= 0x02;
491
492 /* Generate the P2P Interface Address. If the discovery and connection
493 * BSSCFGs need to simultaneously co-exist, then this address must be
494 * different from the P2P Device Address, but also locally administered.
495 */
496 memcpy(p2p->conn_int_addr, p2p->dev_addr, ETH_ALEN);
497 p2p->conn_int_addr[0] |= 0x02;
498 p2p->conn_int_addr[4] ^= 0x80;
499
500 memcpy(p2p->conn2_int_addr, p2p->dev_addr, ETH_ALEN);
501 p2p->conn2_int_addr[0] |= 0x02;
502 p2p->conn2_int_addr[4] ^= 0x90;
503 }
504
505 /**
506 * brcmf_p2p_scan_is_p2p_request() - is cfg80211 scan request a P2P scan.
507 *
508 * @request: the scan request as received from cfg80211.
509 *
510 * returns true if one of the ssids in the request matches the
511 * P2P wildcard ssid; otherwise returns false.
512 */
brcmf_p2p_scan_is_p2p_request(struct cfg80211_scan_request * request)513 static bool brcmf_p2p_scan_is_p2p_request(struct cfg80211_scan_request *request)
514 {
515 struct cfg80211_ssid *ssids = request->ssids;
516 int i;
517
518 for (i = 0; i < request->n_ssids; i++) {
519 if (ssids[i].ssid_len != BRCMF_P2P_WILDCARD_SSID_LEN)
520 continue;
521
522 brcmf_dbg(INFO, "comparing ssid \"%s\"", ssids[i].ssid);
523 if (!memcmp(BRCMF_P2P_WILDCARD_SSID, ssids[i].ssid,
524 BRCMF_P2P_WILDCARD_SSID_LEN))
525 return true;
526 }
527 return false;
528 }
529
530 /**
531 * brcmf_p2p_set_discover_state - set discover state in firmware.
532 *
533 * @ifp: low-level interface object.
534 * @state: discover state to set.
535 * @chanspec: channel parameters (for state @WL_P2P_DISC_ST_LISTEN only).
536 * @listen_ms: duration to listen (for state @WL_P2P_DISC_ST_LISTEN only).
537 */
brcmf_p2p_set_discover_state(struct brcmf_if * ifp,u8 state,u16 chanspec,u16 listen_ms)538 static s32 brcmf_p2p_set_discover_state(struct brcmf_if *ifp, u8 state,
539 u16 chanspec, u16 listen_ms)
540 {
541 struct brcmf_p2p_disc_st_le discover_state;
542 s32 ret = 0;
543 brcmf_dbg(TRACE, "enter\n");
544
545 discover_state.state = state;
546 discover_state.chspec = cpu_to_le16(chanspec);
547 discover_state.dwell = cpu_to_le16(listen_ms);
548 ret = brcmf_fil_bsscfg_data_set(ifp, "p2p_state", &discover_state,
549 sizeof(discover_state));
550 return ret;
551 }
552
553 /**
554 * brcmf_p2p_deinit_discovery() - disable P2P device discovery.
555 *
556 * @p2p: P2P specific data.
557 *
558 * Resets the discovery state and disables it in firmware.
559 */
brcmf_p2p_deinit_discovery(struct brcmf_p2p_info * p2p)560 static s32 brcmf_p2p_deinit_discovery(struct brcmf_p2p_info *p2p)
561 {
562 struct brcmf_cfg80211_vif *vif;
563
564 brcmf_dbg(TRACE, "enter\n");
565
566 /* Set the discovery state to SCAN */
567 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif;
568 (void)brcmf_p2p_set_discover_state(vif->ifp, WL_P2P_DISC_ST_SCAN, 0, 0);
569
570 /* Disable P2P discovery in the firmware */
571 vif = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif;
572 (void)brcmf_fil_iovar_int_set(vif->ifp, "p2p_disc", 0);
573
574 return 0;
575 }
576
577 /**
578 * brcmf_p2p_enable_discovery() - initialize and configure discovery.
579 *
580 * @p2p: P2P specific data.
581 *
582 * Initializes the discovery device and configure the virtual interface.
583 */
brcmf_p2p_enable_discovery(struct brcmf_p2p_info * p2p)584 static int brcmf_p2p_enable_discovery(struct brcmf_p2p_info *p2p)
585 {
586 struct brcmf_pub *drvr = p2p->cfg->pub;
587 struct brcmf_cfg80211_vif *vif;
588 s32 ret = 0;
589
590 brcmf_dbg(TRACE, "enter\n");
591 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif;
592 if (!vif) {
593 bphy_err(drvr, "P2P config device not available\n");
594 ret = -EPERM;
595 goto exit;
596 }
597
598 if (test_bit(BRCMF_P2P_STATUS_ENABLED, &p2p->status)) {
599 brcmf_dbg(INFO, "P2P config device already configured\n");
600 goto exit;
601 }
602
603 /* Re-initialize P2P Discovery in the firmware */
604 vif = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif;
605 ret = brcmf_fil_iovar_int_set(vif->ifp, "p2p_disc", 1);
606 if (ret < 0) {
607 bphy_err(drvr, "set p2p_disc error\n");
608 goto exit;
609 }
610 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif;
611 ret = brcmf_p2p_set_discover_state(vif->ifp, WL_P2P_DISC_ST_SCAN, 0, 0);
612 if (ret < 0) {
613 bphy_err(drvr, "unable to set WL_P2P_DISC_ST_SCAN\n");
614 goto exit;
615 }
616
617 /*
618 * Set wsec to any non-zero value in the discovery bsscfg
619 * to ensure our P2P probe responses have the privacy bit
620 * set in the 802.11 WPA IE. Some peer devices may not
621 * initiate WPS with us if this bit is not set.
622 */
623 ret = brcmf_fil_bsscfg_int_set(vif->ifp, "wsec", AES_ENABLED);
624 if (ret < 0) {
625 bphy_err(drvr, "wsec error %d\n", ret);
626 goto exit;
627 }
628
629 set_bit(BRCMF_P2P_STATUS_ENABLED, &p2p->status);
630 exit:
631 return ret;
632 }
633
634 /**
635 * brcmf_p2p_escan() - initiate a P2P scan.
636 *
637 * @p2p: P2P specific data.
638 * @num_chans: number of channels to scan.
639 * @chanspecs: channel parameters for @num_chans channels.
640 * @search_state: P2P discover state to use.
641 * @bss_type: type of P2P bss.
642 */
brcmf_p2p_escan(struct brcmf_p2p_info * p2p,u32 num_chans,u16 chanspecs[],s32 search_state,enum p2p_bss_type bss_type)643 static s32 brcmf_p2p_escan(struct brcmf_p2p_info *p2p, u32 num_chans,
644 u16 chanspecs[], s32 search_state,
645 enum p2p_bss_type bss_type)
646 {
647 struct brcmf_pub *drvr = p2p->cfg->pub;
648 s32 ret = 0;
649 s32 memsize = offsetof(struct brcmf_p2p_scan_le,
650 eparams.params_le.channel_list);
651 s32 nprobes;
652 s32 active;
653 u32 i;
654 u8 *memblk;
655 struct brcmf_cfg80211_vif *vif;
656 struct brcmf_p2p_scan_le *p2p_params;
657 struct brcmf_scan_params_le *sparams;
658
659 memsize += num_chans * sizeof(__le16);
660 memblk = kzalloc(memsize, GFP_KERNEL);
661 if (!memblk)
662 return -ENOMEM;
663
664 vif = p2p->bss_idx[bss_type].vif;
665 if (vif == NULL) {
666 bphy_err(drvr, "no vif for bss type %d\n", bss_type);
667 ret = -EINVAL;
668 goto exit;
669 }
670 p2p_params = (struct brcmf_p2p_scan_le *)memblk;
671 sparams = &p2p_params->eparams.params_le;
672
673 switch (search_state) {
674 case WL_P2P_DISC_ST_SEARCH:
675 /*
676 * If we in SEARCH STATE, we don't need to set SSID explictly
677 * because dongle use P2P WILDCARD internally by default, use
678 * null ssid, which it is already due to kzalloc.
679 */
680 break;
681 case WL_P2P_DISC_ST_SCAN:
682 /*
683 * wpa_supplicant has p2p_find command with type social or
684 * progressive. For progressive, we need to set the ssid to
685 * P2P WILDCARD because we just do broadcast scan unless
686 * setting SSID.
687 */
688 sparams->ssid_le.SSID_len =
689 cpu_to_le32(BRCMF_P2P_WILDCARD_SSID_LEN);
690 memcpy(sparams->ssid_le.SSID, BRCMF_P2P_WILDCARD_SSID,
691 BRCMF_P2P_WILDCARD_SSID_LEN);
692 break;
693 default:
694 bphy_err(drvr, " invalid search state %d\n", search_state);
695 ret = -EINVAL;
696 goto exit;
697 }
698
699 brcmf_p2p_set_discover_state(vif->ifp, search_state, 0, 0);
700
701 /*
702 * set p2p scan parameters.
703 */
704 p2p_params->type = 'E';
705
706 /* determine the scan engine parameters */
707 sparams->bss_type = DOT11_BSSTYPE_ANY;
708 sparams->scan_type = BRCMF_SCANTYPE_ACTIVE;
709
710 eth_broadcast_addr(sparams->bssid);
711 sparams->home_time = cpu_to_le32(P2PAPI_SCAN_HOME_TIME_MS);
712
713 /*
714 * SOCIAL_CHAN_CNT + 1 takes care of the Progressive scan
715 * supported by the supplicant.
716 */
717 if (num_chans == SOCIAL_CHAN_CNT || num_chans == (SOCIAL_CHAN_CNT + 1))
718 active = P2PAPI_SCAN_SOCIAL_DWELL_TIME_MS;
719 else if (num_chans == AF_PEER_SEARCH_CNT)
720 active = P2PAPI_SCAN_AF_SEARCH_DWELL_TIME_MS;
721 else if (brcmf_get_vif_state_any(p2p->cfg, BRCMF_VIF_STATUS_CONNECTED))
722 active = -1;
723 else
724 active = P2PAPI_SCAN_DWELL_TIME_MS;
725
726 /* Override scan params to find a peer for a connection */
727 if (num_chans == 1) {
728 active = WL_SCAN_CONNECT_DWELL_TIME_MS;
729 /* WAR to sync with presence period of VSDB GO.
730 * send probe request more frequently
731 */
732 nprobes = active / WL_SCAN_JOIN_PROBE_INTERVAL_MS;
733 } else {
734 nprobes = active / P2PAPI_SCAN_NPROBS_TIME_MS;
735 }
736
737 if (nprobes <= 0)
738 nprobes = 1;
739
740 brcmf_dbg(INFO, "nprobes # %d, active_time %d\n", nprobes, active);
741 sparams->active_time = cpu_to_le32(active);
742 sparams->nprobes = cpu_to_le32(nprobes);
743 sparams->passive_time = cpu_to_le32(-1);
744 sparams->channel_num = cpu_to_le32(num_chans &
745 BRCMF_SCAN_PARAMS_COUNT_MASK);
746 for (i = 0; i < num_chans; i++)
747 sparams->channel_list[i] = cpu_to_le16(chanspecs[i]);
748
749 /* set the escan specific parameters */
750 p2p_params->eparams.version = cpu_to_le32(BRCMF_ESCAN_REQ_VERSION);
751 p2p_params->eparams.action = cpu_to_le16(WL_ESCAN_ACTION_START);
752 p2p_params->eparams.sync_id = cpu_to_le16(0x1234);
753 /* perform p2p scan on primary device */
754 ret = brcmf_fil_bsscfg_data_set(vif->ifp, "p2p_scan", memblk, memsize);
755 if (!ret)
756 set_bit(BRCMF_SCAN_STATUS_BUSY, &p2p->cfg->scan_status);
757 exit:
758 kfree(memblk);
759 return ret;
760 }
761
762 /**
763 * brcmf_p2p_run_escan() - escan callback for peer-to-peer.
764 *
765 * @cfg: driver private data for cfg80211 interface.
766 * @ifp: interface control.
767 * @request: scan request from cfg80211.
768 *
769 * Determines the P2P discovery state based to scan request parameters and
770 * validates the channels in the request.
771 */
brcmf_p2p_run_escan(struct brcmf_cfg80211_info * cfg,struct brcmf_if * ifp,struct cfg80211_scan_request * request)772 static s32 brcmf_p2p_run_escan(struct brcmf_cfg80211_info *cfg,
773 struct brcmf_if *ifp,
774 struct cfg80211_scan_request *request)
775 {
776 struct brcmf_p2p_info *p2p = &cfg->p2p;
777 struct brcmf_pub *drvr = cfg->pub;
778 s32 err = 0;
779 s32 search_state = WL_P2P_DISC_ST_SCAN;
780 struct brcmf_cfg80211_vif *vif;
781 struct net_device *dev = NULL;
782 int i, num_nodfs = 0;
783 u16 *chanspecs;
784
785 brcmf_dbg(TRACE, "enter\n");
786
787 if (!request) {
788 err = -EINVAL;
789 goto exit;
790 }
791
792 if (request->n_channels) {
793 chanspecs = kcalloc(request->n_channels, sizeof(*chanspecs),
794 GFP_KERNEL);
795 if (!chanspecs) {
796 err = -ENOMEM;
797 goto exit;
798 }
799 vif = p2p->bss_idx[P2PAPI_BSSCFG_CONNECTION].vif;
800 if (vif)
801 dev = vif->wdev.netdev;
802 if (request->n_channels == 3 &&
803 request->channels[0]->hw_value == SOCIAL_CHAN_1 &&
804 request->channels[1]->hw_value == SOCIAL_CHAN_2 &&
805 request->channels[2]->hw_value == SOCIAL_CHAN_3) {
806 /* SOCIAL CHANNELS 1, 6, 11 */
807 search_state = WL_P2P_DISC_ST_SEARCH;
808 brcmf_dbg(INFO, "P2P SEARCH PHASE START\n");
809 } else if (dev != NULL &&
810 vif->wdev.iftype == NL80211_IFTYPE_P2P_GO) {
811 /* If you are already a GO, then do SEARCH only */
812 brcmf_dbg(INFO, "Already a GO. Do SEARCH Only\n");
813 search_state = WL_P2P_DISC_ST_SEARCH;
814 } else {
815 brcmf_dbg(INFO, "P2P SCAN STATE START\n");
816 }
817
818 /*
819 * no P2P scanning on passive or DFS channels.
820 */
821 for (i = 0; i < request->n_channels; i++) {
822 struct ieee80211_channel *chan = request->channels[i];
823
824 if (chan->flags & (IEEE80211_CHAN_RADAR |
825 IEEE80211_CHAN_NO_IR))
826 continue;
827
828 chanspecs[i] = channel_to_chanspec(&p2p->cfg->d11inf,
829 chan);
830 brcmf_dbg(INFO, "%d: chan=%d, channel spec=%x\n",
831 num_nodfs, chan->hw_value, chanspecs[i]);
832 num_nodfs++;
833 }
834 err = brcmf_p2p_escan(p2p, num_nodfs, chanspecs, search_state,
835 P2PAPI_BSSCFG_DEVICE);
836 kfree(chanspecs);
837 }
838 exit:
839 if (err)
840 bphy_err(drvr, "error (%d)\n", err);
841 return err;
842 }
843
844
845 /**
846 * brcmf_p2p_find_listen_channel() - find listen channel in ie string.
847 *
848 * @ie: string of information elements.
849 * @ie_len: length of string.
850 *
851 * Scan ie for p2p ie and look for attribute 6 channel. If available determine
852 * channel and return it.
853 */
brcmf_p2p_find_listen_channel(const u8 * ie,u32 ie_len)854 static s32 brcmf_p2p_find_listen_channel(const u8 *ie, u32 ie_len)
855 {
856 u8 channel_ie[5];
857 s32 listen_channel;
858 s32 err;
859
860 err = cfg80211_get_p2p_attr(ie, ie_len,
861 IEEE80211_P2P_ATTR_LISTEN_CHANNEL,
862 channel_ie, sizeof(channel_ie));
863 if (err < 0)
864 return err;
865
866 /* listen channel subel length format: */
867 /* 3(country) + 1(op. class) + 1(chan num) */
868 listen_channel = (s32)channel_ie[3 + 1];
869
870 if (listen_channel == SOCIAL_CHAN_1 ||
871 listen_channel == SOCIAL_CHAN_2 ||
872 listen_channel == SOCIAL_CHAN_3) {
873 brcmf_dbg(INFO, "Found my Listen Channel %d\n", listen_channel);
874 return listen_channel;
875 }
876
877 return -EPERM;
878 }
879
880
881 /**
882 * brcmf_p2p_scan_prep() - prepare scan based on request.
883 *
884 * @wiphy: wiphy device.
885 * @request: scan request from cfg80211.
886 * @vif: vif on which scan request is to be executed.
887 *
888 * Prepare the scan appropriately for type of scan requested. Overrides the
889 * escan .run() callback for peer-to-peer scanning.
890 */
brcmf_p2p_scan_prep(struct wiphy * wiphy,struct cfg80211_scan_request * request,struct brcmf_cfg80211_vif * vif)891 int brcmf_p2p_scan_prep(struct wiphy *wiphy,
892 struct cfg80211_scan_request *request,
893 struct brcmf_cfg80211_vif *vif)
894 {
895 struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
896 struct brcmf_p2p_info *p2p = &cfg->p2p;
897 int err;
898
899 if (brcmf_p2p_scan_is_p2p_request(request)) {
900 /* find my listen channel */
901 err = brcmf_p2p_find_listen_channel(request->ie,
902 request->ie_len);
903 if (err < 0)
904 return err;
905
906 p2p->afx_hdl.my_listen_chan = err;
907
908 clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status);
909 brcmf_dbg(INFO, "P2P: GO_NEG_PHASE status cleared\n");
910
911 err = brcmf_p2p_enable_discovery(p2p);
912 if (err)
913 return err;
914
915 /* override .run_escan() callback. */
916 cfg->escan_info.run = brcmf_p2p_run_escan;
917 }
918 return 0;
919 }
920
921
922 /**
923 * brcmf_p2p_discover_listen() - set firmware to discover listen state.
924 *
925 * @p2p: p2p device.
926 * @channel: channel nr for discover listen.
927 * @duration: time in ms to stay on channel.
928 *
929 */
930 static s32
brcmf_p2p_discover_listen(struct brcmf_p2p_info * p2p,u16 channel,u32 duration)931 brcmf_p2p_discover_listen(struct brcmf_p2p_info *p2p, u16 channel, u32 duration)
932 {
933 struct brcmf_pub *drvr = p2p->cfg->pub;
934 struct brcmf_cfg80211_vif *vif;
935 struct brcmu_chan ch;
936 s32 err = 0;
937
938 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif;
939 if (!vif) {
940 bphy_err(drvr, "Discovery is not set, so we have nothing to do\n");
941 err = -EPERM;
942 goto exit;
943 }
944
945 if (test_bit(BRCMF_P2P_STATUS_DISCOVER_LISTEN, &p2p->status)) {
946 bphy_err(drvr, "Previous LISTEN is not completed yet\n");
947 /* WAR: prevent cookie mismatch in wpa_supplicant return OK */
948 goto exit;
949 }
950
951 ch.chnum = channel;
952 ch.bw = BRCMU_CHAN_BW_20;
953 p2p->cfg->d11inf.encchspec(&ch);
954 err = brcmf_p2p_set_discover_state(vif->ifp, WL_P2P_DISC_ST_LISTEN,
955 ch.chspec, (u16)duration);
956 if (!err) {
957 set_bit(BRCMF_P2P_STATUS_DISCOVER_LISTEN, &p2p->status);
958 p2p->remain_on_channel_cookie++;
959 }
960 exit:
961 return err;
962 }
963
964
965 /**
966 * brcmf_p2p_remain_on_channel() - put device on channel and stay there.
967 *
968 * @wiphy: wiphy device.
969 * @wdev: wireless device.
970 * @channel: channel to stay on.
971 * @duration: time in ms to remain on channel.
972 * @cookie: cookie.
973 */
brcmf_p2p_remain_on_channel(struct wiphy * wiphy,struct wireless_dev * wdev,struct ieee80211_channel * channel,unsigned int duration,u64 * cookie)974 int brcmf_p2p_remain_on_channel(struct wiphy *wiphy, struct wireless_dev *wdev,
975 struct ieee80211_channel *channel,
976 unsigned int duration, u64 *cookie)
977 {
978 struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
979 struct brcmf_p2p_info *p2p = &cfg->p2p;
980 s32 err;
981 u16 channel_nr;
982
983 channel_nr = ieee80211_frequency_to_channel(channel->center_freq);
984 brcmf_dbg(TRACE, "Enter, channel: %d, duration ms (%d)\n", channel_nr,
985 duration);
986
987 err = brcmf_p2p_enable_discovery(p2p);
988 if (err)
989 goto exit;
990 err = brcmf_p2p_discover_listen(p2p, channel_nr, duration);
991 if (err)
992 goto exit;
993
994 memcpy(&p2p->remain_on_channel, channel, sizeof(*channel));
995 *cookie = p2p->remain_on_channel_cookie;
996 cfg80211_ready_on_channel(wdev, *cookie, channel, duration, GFP_KERNEL);
997
998 exit:
999 return err;
1000 }
1001
1002
1003 /**
1004 * brcmf_p2p_notify_listen_complete() - p2p listen has completed.
1005 *
1006 * @ifp: interfac control.
1007 * @e: event message. Not used, to make it usable for fweh event dispatcher.
1008 * @data: payload of message. Not used.
1009 *
1010 */
brcmf_p2p_notify_listen_complete(struct brcmf_if * ifp,const struct brcmf_event_msg * e,void * data)1011 int brcmf_p2p_notify_listen_complete(struct brcmf_if *ifp,
1012 const struct brcmf_event_msg *e,
1013 void *data)
1014 {
1015 struct brcmf_cfg80211_info *cfg = ifp->drvr->config;
1016 struct brcmf_p2p_info *p2p = &cfg->p2p;
1017
1018 brcmf_dbg(TRACE, "Enter\n");
1019 if (test_and_clear_bit(BRCMF_P2P_STATUS_DISCOVER_LISTEN,
1020 &p2p->status)) {
1021 if (test_and_clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_AF_LISTEN,
1022 &p2p->status)) {
1023 clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME,
1024 &p2p->status);
1025 brcmf_dbg(INFO, "Listen DONE, wake up wait_next_af\n");
1026 complete(&p2p->wait_next_af);
1027 }
1028
1029 cfg80211_remain_on_channel_expired(&ifp->vif->wdev,
1030 p2p->remain_on_channel_cookie,
1031 &p2p->remain_on_channel,
1032 GFP_KERNEL);
1033 }
1034 return 0;
1035 }
1036
1037
1038 /**
1039 * brcmf_p2p_cancel_remain_on_channel() - cancel p2p listen state.
1040 *
1041 * @ifp: interfac control.
1042 *
1043 */
brcmf_p2p_cancel_remain_on_channel(struct brcmf_if * ifp)1044 void brcmf_p2p_cancel_remain_on_channel(struct brcmf_if *ifp)
1045 {
1046 if (!ifp)
1047 return;
1048 brcmf_p2p_set_discover_state(ifp, WL_P2P_DISC_ST_SCAN, 0, 0);
1049 brcmf_p2p_notify_listen_complete(ifp, NULL, NULL);
1050 }
1051
1052
1053 /**
1054 * brcmf_p2p_act_frm_search() - search function for action frame.
1055 *
1056 * @p2p: p2p device.
1057 * @channel: channel on which action frame is to be trasmitted.
1058 *
1059 * search function to reach at common channel to send action frame. When
1060 * channel is 0 then all social channels will be used to send af
1061 */
brcmf_p2p_act_frm_search(struct brcmf_p2p_info * p2p,u16 channel)1062 static s32 brcmf_p2p_act_frm_search(struct brcmf_p2p_info *p2p, u16 channel)
1063 {
1064 struct brcmf_pub *drvr = p2p->cfg->pub;
1065 s32 err;
1066 u32 channel_cnt;
1067 u16 *default_chan_list;
1068 u32 i;
1069 struct brcmu_chan ch;
1070
1071 brcmf_dbg(TRACE, "Enter\n");
1072
1073 if (channel)
1074 channel_cnt = AF_PEER_SEARCH_CNT;
1075 else
1076 channel_cnt = SOCIAL_CHAN_CNT;
1077 default_chan_list = kcalloc(channel_cnt, sizeof(*default_chan_list),
1078 GFP_KERNEL);
1079 if (default_chan_list == NULL) {
1080 bphy_err(drvr, "channel list allocation failed\n");
1081 err = -ENOMEM;
1082 goto exit;
1083 }
1084 ch.bw = BRCMU_CHAN_BW_20;
1085 if (channel) {
1086 ch.chnum = channel;
1087 p2p->cfg->d11inf.encchspec(&ch);
1088 /* insert same channel to the chan_list */
1089 for (i = 0; i < channel_cnt; i++)
1090 default_chan_list[i] = ch.chspec;
1091 } else {
1092 ch.chnum = SOCIAL_CHAN_1;
1093 p2p->cfg->d11inf.encchspec(&ch);
1094 default_chan_list[0] = ch.chspec;
1095 ch.chnum = SOCIAL_CHAN_2;
1096 p2p->cfg->d11inf.encchspec(&ch);
1097 default_chan_list[1] = ch.chspec;
1098 ch.chnum = SOCIAL_CHAN_3;
1099 p2p->cfg->d11inf.encchspec(&ch);
1100 default_chan_list[2] = ch.chspec;
1101 }
1102 err = brcmf_p2p_escan(p2p, channel_cnt, default_chan_list,
1103 WL_P2P_DISC_ST_SEARCH, P2PAPI_BSSCFG_DEVICE);
1104 kfree(default_chan_list);
1105 exit:
1106 return err;
1107 }
1108
1109
1110 /**
1111 * brcmf_p2p_afx_handler() - afx worker thread.
1112 *
1113 * @work:
1114 *
1115 */
brcmf_p2p_afx_handler(struct work_struct * work)1116 static void brcmf_p2p_afx_handler(struct work_struct *work)
1117 {
1118 struct afx_hdl *afx_hdl = container_of(work, struct afx_hdl, afx_work);
1119 struct brcmf_p2p_info *p2p = container_of(afx_hdl,
1120 struct brcmf_p2p_info,
1121 afx_hdl);
1122 struct brcmf_pub *drvr = p2p->cfg->pub;
1123 s32 err;
1124
1125 if (!afx_hdl->is_active)
1126 return;
1127
1128 if (afx_hdl->is_listen && afx_hdl->my_listen_chan)
1129 /* 100ms ~ 300ms */
1130 err = brcmf_p2p_discover_listen(p2p, afx_hdl->my_listen_chan,
1131 100 * get_random_u32_inclusive(1, 3));
1132 else
1133 err = brcmf_p2p_act_frm_search(p2p, afx_hdl->peer_listen_chan);
1134
1135 if (err) {
1136 bphy_err(drvr, "ERROR occurred! value is (%d)\n", err);
1137 if (test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL,
1138 &p2p->status))
1139 complete(&afx_hdl->act_frm_scan);
1140 }
1141 }
1142
1143
1144 /**
1145 * brcmf_p2p_af_searching_channel() - search channel.
1146 *
1147 * @p2p: p2p device info struct.
1148 *
1149 */
brcmf_p2p_af_searching_channel(struct brcmf_p2p_info * p2p)1150 static s32 brcmf_p2p_af_searching_channel(struct brcmf_p2p_info *p2p)
1151 {
1152 struct afx_hdl *afx_hdl = &p2p->afx_hdl;
1153 struct brcmf_cfg80211_vif *pri_vif;
1154 s32 retry;
1155
1156 brcmf_dbg(TRACE, "Enter\n");
1157
1158 pri_vif = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif;
1159
1160 reinit_completion(&afx_hdl->act_frm_scan);
1161 set_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status);
1162 afx_hdl->is_active = true;
1163 afx_hdl->peer_chan = P2P_INVALID_CHANNEL;
1164
1165 /* Loop to wait until we find a peer's channel or the
1166 * pending action frame tx is cancelled.
1167 */
1168 retry = 0;
1169 while ((retry < P2P_CHANNEL_SYNC_RETRY) &&
1170 (afx_hdl->peer_chan == P2P_INVALID_CHANNEL)) {
1171 afx_hdl->is_listen = false;
1172 brcmf_dbg(TRACE, "Scheduling action frame for sending.. (%d)\n",
1173 retry);
1174 /* search peer on peer's listen channel */
1175 schedule_work(&afx_hdl->afx_work);
1176 wait_for_completion_timeout(&afx_hdl->act_frm_scan,
1177 P2P_AF_FRM_SCAN_MAX_WAIT);
1178 if ((afx_hdl->peer_chan != P2P_INVALID_CHANNEL) ||
1179 (!test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL,
1180 &p2p->status)))
1181 break;
1182
1183 if (afx_hdl->my_listen_chan) {
1184 brcmf_dbg(TRACE, "Scheduling listen peer, channel=%d\n",
1185 afx_hdl->my_listen_chan);
1186 /* listen on my listen channel */
1187 afx_hdl->is_listen = true;
1188 schedule_work(&afx_hdl->afx_work);
1189 wait_for_completion_timeout(&afx_hdl->act_frm_scan,
1190 P2P_AF_FRM_SCAN_MAX_WAIT);
1191 }
1192 if ((afx_hdl->peer_chan != P2P_INVALID_CHANNEL) ||
1193 (!test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL,
1194 &p2p->status)))
1195 break;
1196 retry++;
1197
1198 /* if sta is connected or connecting, sleep for a while before
1199 * retry af tx or finding a peer
1200 */
1201 if (test_bit(BRCMF_VIF_STATUS_CONNECTED, &pri_vif->sme_state) ||
1202 test_bit(BRCMF_VIF_STATUS_CONNECTING, &pri_vif->sme_state))
1203 msleep(P2P_DEFAULT_SLEEP_TIME_VSDB);
1204 }
1205
1206 brcmf_dbg(TRACE, "Completed search/listen peer_chan=%d\n",
1207 afx_hdl->peer_chan);
1208 afx_hdl->is_active = false;
1209
1210 clear_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status);
1211
1212 return afx_hdl->peer_chan;
1213 }
1214
1215
1216 /**
1217 * brcmf_p2p_scan_finding_common_channel() - was escan used for finding channel
1218 *
1219 * @cfg: common configuration struct.
1220 * @bi: bss info struct, result from scan.
1221 *
1222 */
brcmf_p2p_scan_finding_common_channel(struct brcmf_cfg80211_info * cfg,struct brcmf_bss_info_le * bi)1223 bool brcmf_p2p_scan_finding_common_channel(struct brcmf_cfg80211_info *cfg,
1224 struct brcmf_bss_info_le *bi)
1225
1226 {
1227 struct brcmf_p2p_info *p2p = &cfg->p2p;
1228 struct afx_hdl *afx_hdl = &p2p->afx_hdl;
1229 struct brcmu_chan ch;
1230 u8 *ie;
1231 s32 err;
1232 u8 p2p_dev_addr[ETH_ALEN];
1233
1234 if (!test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status))
1235 return false;
1236
1237 if (bi == NULL) {
1238 brcmf_dbg(TRACE, "ACTION FRAME SCAN Done\n");
1239 if (afx_hdl->peer_chan == P2P_INVALID_CHANNEL)
1240 complete(&afx_hdl->act_frm_scan);
1241 return true;
1242 }
1243
1244 ie = ((u8 *)bi) + le16_to_cpu(bi->ie_offset);
1245 memset(p2p_dev_addr, 0, sizeof(p2p_dev_addr));
1246 err = cfg80211_get_p2p_attr(ie, le32_to_cpu(bi->ie_length),
1247 IEEE80211_P2P_ATTR_DEVICE_INFO,
1248 p2p_dev_addr, sizeof(p2p_dev_addr));
1249 if (err < 0)
1250 err = cfg80211_get_p2p_attr(ie, le32_to_cpu(bi->ie_length),
1251 IEEE80211_P2P_ATTR_DEVICE_ID,
1252 p2p_dev_addr, sizeof(p2p_dev_addr));
1253 if ((err >= 0) &&
1254 (ether_addr_equal(p2p_dev_addr, afx_hdl->tx_dst_addr))) {
1255 if (!bi->ctl_ch) {
1256 ch.chspec = le16_to_cpu(bi->chanspec);
1257 cfg->d11inf.decchspec(&ch);
1258 bi->ctl_ch = ch.control_ch_num;
1259 }
1260 afx_hdl->peer_chan = bi->ctl_ch;
1261 brcmf_dbg(TRACE, "ACTION FRAME SCAN : Peer %pM found, channel : %d\n",
1262 afx_hdl->tx_dst_addr, afx_hdl->peer_chan);
1263 complete(&afx_hdl->act_frm_scan);
1264 }
1265 return true;
1266 }
1267
1268 /**
1269 * brcmf_p2p_abort_action_frame() - abort action frame.
1270 *
1271 * @cfg: common configuration struct.
1272 *
1273 */
brcmf_p2p_abort_action_frame(struct brcmf_cfg80211_info * cfg)1274 static s32 brcmf_p2p_abort_action_frame(struct brcmf_cfg80211_info *cfg)
1275 {
1276 struct brcmf_p2p_info *p2p = &cfg->p2p;
1277 struct brcmf_cfg80211_vif *vif;
1278 s32 err;
1279 s32 int_val = 1;
1280
1281 brcmf_dbg(TRACE, "Enter\n");
1282
1283 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif;
1284 err = brcmf_fil_bsscfg_data_set(vif->ifp, "actframe_abort", &int_val,
1285 sizeof(s32));
1286 if (err)
1287 brcmf_err(" aborting action frame has failed (%d)\n", err);
1288
1289 return err;
1290 }
1291
1292 /**
1293 * brcmf_p2p_stop_wait_next_action_frame() - finish scan if af tx complete.
1294 *
1295 * @cfg: common configuration struct.
1296 *
1297 */
1298 static void
brcmf_p2p_stop_wait_next_action_frame(struct brcmf_cfg80211_info * cfg)1299 brcmf_p2p_stop_wait_next_action_frame(struct brcmf_cfg80211_info *cfg)
1300 {
1301 struct brcmf_p2p_info *p2p = &cfg->p2p;
1302 struct brcmf_if *ifp = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->ifp;
1303 s32 err;
1304
1305 if (test_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status) &&
1306 (test_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status) ||
1307 test_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status))) {
1308 brcmf_dbg(TRACE, "*** Wake UP ** abort actframe iovar\n");
1309 /* if channel is not zero, "actfame" uses off channel scan.
1310 * So abort scan for off channel completion.
1311 */
1312 if (p2p->af_sent_channel) {
1313 /* abort actframe using actframe_abort or abort scan */
1314 err = brcmf_p2p_abort_action_frame(cfg);
1315 if (err)
1316 brcmf_notify_escan_complete(cfg, ifp, true,
1317 true);
1318 }
1319 } else if (test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_AF_LISTEN,
1320 &p2p->status)) {
1321 brcmf_dbg(TRACE, "*** Wake UP ** abort listen for next af frame\n");
1322 /* So abort scan to cancel listen */
1323 brcmf_notify_escan_complete(cfg, ifp, true, true);
1324 }
1325 }
1326
1327
1328 /**
1329 * brcmf_p2p_gon_req_collision() - Check if go negotiaton collission
1330 *
1331 * @p2p: p2p device info struct.
1332 * @mac: MAC address.
1333 *
1334 * return true if recevied action frame is to be dropped.
1335 */
1336 static bool
brcmf_p2p_gon_req_collision(struct brcmf_p2p_info * p2p,u8 * mac)1337 brcmf_p2p_gon_req_collision(struct brcmf_p2p_info *p2p, u8 *mac)
1338 {
1339 struct brcmf_cfg80211_info *cfg = p2p->cfg;
1340 struct brcmf_if *ifp;
1341
1342 brcmf_dbg(TRACE, "Enter\n");
1343
1344 if (!test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status) ||
1345 !p2p->gon_req_action)
1346 return false;
1347
1348 brcmf_dbg(TRACE, "GO Negotiation Request COLLISION !!!\n");
1349 /* if sa(peer) addr is less than da(my) addr, then this device
1350 * process peer's gon request and block to send gon req.
1351 * if not (sa addr > da addr),
1352 * this device will process gon request and drop gon req of peer.
1353 */
1354 ifp = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif->ifp;
1355 if (memcmp(mac, ifp->mac_addr, ETH_ALEN) < 0) {
1356 brcmf_dbg(INFO, "Block transmit gon req !!!\n");
1357 p2p->block_gon_req_tx = true;
1358 /* if we are finding a common channel for sending af,
1359 * do not scan more to block to send current gon req
1360 */
1361 if (test_and_clear_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL,
1362 &p2p->status))
1363 complete(&p2p->afx_hdl.act_frm_scan);
1364 if (test_and_clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME,
1365 &p2p->status))
1366 brcmf_p2p_stop_wait_next_action_frame(cfg);
1367 return false;
1368 }
1369
1370 /* drop gon request of peer to process gon request by this device. */
1371 brcmf_dbg(INFO, "Drop received gon req !!!\n");
1372
1373 return true;
1374 }
1375
1376
1377 /**
1378 * brcmf_p2p_notify_action_frame_rx() - received action frame.
1379 *
1380 * @ifp: interfac control.
1381 * @e: event message. Not used, to make it usable for fweh event dispatcher.
1382 * @data: payload of message, containing action frame data.
1383 *
1384 */
brcmf_p2p_notify_action_frame_rx(struct brcmf_if * ifp,const struct brcmf_event_msg * e,void * data)1385 int brcmf_p2p_notify_action_frame_rx(struct brcmf_if *ifp,
1386 const struct brcmf_event_msg *e,
1387 void *data)
1388 {
1389 struct brcmf_pub *drvr = ifp->drvr;
1390 struct brcmf_cfg80211_info *cfg = drvr->config;
1391 struct brcmf_p2p_info *p2p = &cfg->p2p;
1392 struct afx_hdl *afx_hdl = &p2p->afx_hdl;
1393 struct wireless_dev *wdev;
1394 u32 mgmt_frame_len = e->datalen - sizeof(struct brcmf_rx_mgmt_data);
1395 struct brcmf_rx_mgmt_data *rxframe = (struct brcmf_rx_mgmt_data *)data;
1396 u8 *frame = (u8 *)(rxframe + 1);
1397 struct brcmf_p2p_pub_act_frame *act_frm;
1398 struct brcmf_p2psd_gas_pub_act_frame *sd_act_frm;
1399 struct brcmu_chan ch;
1400 struct ieee80211_mgmt *mgmt_frame;
1401 s32 freq;
1402 u16 mgmt_type;
1403 u8 action;
1404
1405 if (e->datalen < sizeof(*rxframe)) {
1406 brcmf_dbg(SCAN, "Event data to small. Ignore\n");
1407 return 0;
1408 }
1409
1410 ch.chspec = be16_to_cpu(rxframe->chanspec);
1411 cfg->d11inf.decchspec(&ch);
1412 /* Check if wpa_supplicant has registered for this frame */
1413 brcmf_dbg(INFO, "ifp->vif->mgmt_rx_reg %04x\n", ifp->vif->mgmt_rx_reg);
1414 mgmt_type = (IEEE80211_STYPE_ACTION & IEEE80211_FCTL_STYPE) >> 4;
1415 if ((ifp->vif->mgmt_rx_reg & BIT(mgmt_type)) == 0)
1416 return 0;
1417
1418 brcmf_p2p_print_actframe(false, frame, mgmt_frame_len);
1419
1420 action = P2P_PAF_SUBTYPE_INVALID;
1421 if (brcmf_p2p_is_pub_action(frame, mgmt_frame_len)) {
1422 act_frm = (struct brcmf_p2p_pub_act_frame *)frame;
1423 action = act_frm->subtype;
1424 if ((action == P2P_PAF_GON_REQ) &&
1425 (brcmf_p2p_gon_req_collision(p2p, (u8 *)e->addr))) {
1426 if (test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL,
1427 &p2p->status) &&
1428 (ether_addr_equal(afx_hdl->tx_dst_addr, e->addr))) {
1429 afx_hdl->peer_chan = ch.control_ch_num;
1430 brcmf_dbg(INFO, "GON request: Peer found, channel=%d\n",
1431 afx_hdl->peer_chan);
1432 complete(&afx_hdl->act_frm_scan);
1433 }
1434 return 0;
1435 }
1436 /* After complete GO Negotiation, roll back to mpc mode */
1437 if ((action == P2P_PAF_GON_CONF) ||
1438 (action == P2P_PAF_PROVDIS_RSP))
1439 brcmf_set_mpc(ifp, 1);
1440 if (action == P2P_PAF_GON_CONF) {
1441 brcmf_dbg(TRACE, "P2P: GO_NEG_PHASE status cleared\n");
1442 clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status);
1443 }
1444 } else if (brcmf_p2p_is_gas_action(frame, mgmt_frame_len)) {
1445 sd_act_frm = (struct brcmf_p2psd_gas_pub_act_frame *)frame;
1446 action = sd_act_frm->action;
1447 }
1448
1449 if (test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status) &&
1450 (p2p->next_af_subtype == action)) {
1451 brcmf_dbg(TRACE, "We got a right next frame! (%d)\n", action);
1452 clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME,
1453 &p2p->status);
1454 /* Stop waiting for next AF. */
1455 brcmf_p2p_stop_wait_next_action_frame(cfg);
1456 }
1457
1458 mgmt_frame = kzalloc(offsetof(struct ieee80211_mgmt, u) +
1459 mgmt_frame_len, GFP_KERNEL);
1460 if (!mgmt_frame) {
1461 bphy_err(drvr, "No memory available for action frame\n");
1462 return -ENOMEM;
1463 }
1464 memcpy(mgmt_frame->da, ifp->mac_addr, ETH_ALEN);
1465 brcmf_fil_cmd_data_get(ifp, BRCMF_C_GET_BSSID, mgmt_frame->bssid,
1466 ETH_ALEN);
1467 memcpy(mgmt_frame->sa, e->addr, ETH_ALEN);
1468 mgmt_frame->frame_control = cpu_to_le16(IEEE80211_STYPE_ACTION);
1469 memcpy(mgmt_frame->u.body, frame, mgmt_frame_len);
1470 mgmt_frame_len += offsetof(struct ieee80211_mgmt, u.body);
1471
1472 freq = ieee80211_channel_to_frequency(ch.control_ch_num,
1473 ch.band == BRCMU_CHAN_BAND_2G ?
1474 NL80211_BAND_2GHZ :
1475 NL80211_BAND_5GHZ);
1476
1477 wdev = &ifp->vif->wdev;
1478 cfg80211_rx_mgmt(wdev, freq, 0, (u8 *)mgmt_frame, mgmt_frame_len, 0);
1479
1480 kfree(mgmt_frame);
1481 return 0;
1482 }
1483
1484
1485 /**
1486 * brcmf_p2p_notify_action_tx_complete() - transmit action frame complete
1487 *
1488 * @ifp: interfac control.
1489 * @e: event message. Not used, to make it usable for fweh event dispatcher.
1490 * @data: not used.
1491 *
1492 */
brcmf_p2p_notify_action_tx_complete(struct brcmf_if * ifp,const struct brcmf_event_msg * e,void * data)1493 int brcmf_p2p_notify_action_tx_complete(struct brcmf_if *ifp,
1494 const struct brcmf_event_msg *e,
1495 void *data)
1496 {
1497 struct brcmf_cfg80211_info *cfg = ifp->drvr->config;
1498 struct brcmf_p2p_info *p2p = &cfg->p2p;
1499
1500 brcmf_dbg(INFO, "Enter: event %s, status=%d\n",
1501 e->event_code == BRCMF_E_ACTION_FRAME_OFF_CHAN_COMPLETE ?
1502 "ACTION_FRAME_OFF_CHAN_COMPLETE" : "ACTION_FRAME_COMPLETE",
1503 e->status);
1504
1505 if (!test_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status))
1506 return 0;
1507
1508 if (e->event_code == BRCMF_E_ACTION_FRAME_COMPLETE) {
1509 if (e->status == BRCMF_E_STATUS_SUCCESS) {
1510 set_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED,
1511 &p2p->status);
1512 if (!p2p->wait_for_offchan_complete)
1513 complete(&p2p->send_af_done);
1514 } else {
1515 set_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status);
1516 /* If there is no ack, we don't need to wait for
1517 * WLC_E_ACTION_FRAME_OFFCHAN_COMPLETE event
1518 */
1519 brcmf_p2p_stop_wait_next_action_frame(cfg);
1520 }
1521
1522 } else {
1523 complete(&p2p->send_af_done);
1524 }
1525 return 0;
1526 }
1527
1528
1529 /**
1530 * brcmf_p2p_tx_action_frame() - send action frame over fil.
1531 *
1532 * @p2p: p2p info struct for vif.
1533 * @af_params: action frame data/info.
1534 *
1535 * Send an action frame immediately without doing channel synchronization.
1536 *
1537 * This function waits for a completion event before returning.
1538 * The WLC_E_ACTION_FRAME_COMPLETE event will be received when the action
1539 * frame is transmitted.
1540 */
brcmf_p2p_tx_action_frame(struct brcmf_p2p_info * p2p,struct brcmf_fil_af_params_le * af_params)1541 static s32 brcmf_p2p_tx_action_frame(struct brcmf_p2p_info *p2p,
1542 struct brcmf_fil_af_params_le *af_params)
1543 {
1544 struct brcmf_pub *drvr = p2p->cfg->pub;
1545 struct brcmf_cfg80211_vif *vif;
1546 struct brcmf_p2p_action_frame *p2p_af;
1547 s32 err = 0;
1548
1549 brcmf_dbg(TRACE, "Enter\n");
1550
1551 reinit_completion(&p2p->send_af_done);
1552 clear_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status);
1553 clear_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status);
1554
1555 /* check if it is a p2p_presence response */
1556 p2p_af = (struct brcmf_p2p_action_frame *)af_params->action_frame.data;
1557 if (p2p_af->subtype == P2P_AF_PRESENCE_RSP)
1558 vif = p2p->bss_idx[P2PAPI_BSSCFG_CONNECTION].vif;
1559 else
1560 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif;
1561
1562 err = brcmf_fil_bsscfg_data_set(vif->ifp, "actframe", af_params,
1563 sizeof(*af_params));
1564 if (err) {
1565 bphy_err(drvr, " sending action frame has failed\n");
1566 goto exit;
1567 }
1568
1569 p2p->af_sent_channel = le32_to_cpu(af_params->channel);
1570 p2p->af_tx_sent_jiffies = jiffies;
1571
1572 if (test_bit(BRCMF_P2P_STATUS_DISCOVER_LISTEN, &p2p->status) &&
1573 p2p->af_sent_channel ==
1574 ieee80211_frequency_to_channel(p2p->remain_on_channel.center_freq))
1575 p2p->wait_for_offchan_complete = false;
1576 else
1577 p2p->wait_for_offchan_complete = true;
1578
1579 brcmf_dbg(TRACE, "Waiting for %s tx completion event\n",
1580 (p2p->wait_for_offchan_complete) ?
1581 "off-channel" : "on-channel");
1582
1583 wait_for_completion_timeout(&p2p->send_af_done, P2P_AF_MAX_WAIT_TIME);
1584
1585 if (test_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status)) {
1586 brcmf_dbg(TRACE, "TX action frame operation is success\n");
1587 } else {
1588 err = -EIO;
1589 brcmf_dbg(TRACE, "TX action frame operation has failed\n");
1590 }
1591 /* clear status bit for action tx */
1592 clear_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status);
1593 clear_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status);
1594
1595 exit:
1596 return err;
1597 }
1598
1599
1600 /**
1601 * brcmf_p2p_pub_af_tx() - public action frame tx routine.
1602 *
1603 * @cfg: driver private data for cfg80211 interface.
1604 * @af_params: action frame data/info.
1605 * @config_af_params: configuration data for action frame.
1606 *
1607 * routine which transmits ation frame public type.
1608 */
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)1609 static s32 brcmf_p2p_pub_af_tx(struct brcmf_cfg80211_info *cfg,
1610 struct brcmf_fil_af_params_le *af_params,
1611 struct brcmf_config_af_params *config_af_params)
1612 {
1613 struct brcmf_p2p_info *p2p = &cfg->p2p;
1614 struct brcmf_pub *drvr = cfg->pub;
1615 struct brcmf_fil_action_frame_le *action_frame;
1616 struct brcmf_p2p_pub_act_frame *act_frm;
1617 s32 err = 0;
1618 u16 ie_len;
1619
1620 action_frame = &af_params->action_frame;
1621 act_frm = (struct brcmf_p2p_pub_act_frame *)(action_frame->data);
1622
1623 config_af_params->extra_listen = true;
1624
1625 switch (act_frm->subtype) {
1626 case P2P_PAF_GON_REQ:
1627 brcmf_dbg(TRACE, "P2P: GO_NEG_PHASE status set\n");
1628 set_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status);
1629 config_af_params->mpc_onoff = 0;
1630 config_af_params->search_channel = true;
1631 p2p->next_af_subtype = act_frm->subtype + 1;
1632 p2p->gon_req_action = true;
1633 /* increase dwell time to wait for RESP frame */
1634 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME);
1635 break;
1636 case P2P_PAF_GON_RSP:
1637 p2p->next_af_subtype = act_frm->subtype + 1;
1638 /* increase dwell time to wait for CONF frame */
1639 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME);
1640 break;
1641 case P2P_PAF_GON_CONF:
1642 /* If we reached till GO Neg confirmation reset the filter */
1643 brcmf_dbg(TRACE, "P2P: GO_NEG_PHASE status cleared\n");
1644 clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status);
1645 /* turn on mpc again if go nego is done */
1646 config_af_params->mpc_onoff = 1;
1647 /* minimize dwell time */
1648 af_params->dwell_time = cpu_to_le32(P2P_AF_MIN_DWELL_TIME);
1649 config_af_params->extra_listen = false;
1650 break;
1651 case P2P_PAF_INVITE_REQ:
1652 config_af_params->search_channel = true;
1653 p2p->next_af_subtype = act_frm->subtype + 1;
1654 /* increase dwell time */
1655 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME);
1656 break;
1657 case P2P_PAF_INVITE_RSP:
1658 /* minimize dwell time */
1659 af_params->dwell_time = cpu_to_le32(P2P_AF_MIN_DWELL_TIME);
1660 config_af_params->extra_listen = false;
1661 break;
1662 case P2P_PAF_DEVDIS_REQ:
1663 config_af_params->search_channel = true;
1664 p2p->next_af_subtype = act_frm->subtype + 1;
1665 /* maximize dwell time to wait for RESP frame */
1666 af_params->dwell_time = cpu_to_le32(P2P_AF_LONG_DWELL_TIME);
1667 break;
1668 case P2P_PAF_DEVDIS_RSP:
1669 /* minimize dwell time */
1670 af_params->dwell_time = cpu_to_le32(P2P_AF_MIN_DWELL_TIME);
1671 config_af_params->extra_listen = false;
1672 break;
1673 case P2P_PAF_PROVDIS_REQ:
1674 ie_len = le16_to_cpu(action_frame->len) -
1675 offsetof(struct brcmf_p2p_pub_act_frame, elts);
1676 if (cfg80211_get_p2p_attr(&act_frm->elts[0], ie_len,
1677 IEEE80211_P2P_ATTR_GROUP_ID,
1678 NULL, 0) < 0)
1679 config_af_params->search_channel = true;
1680 config_af_params->mpc_onoff = 0;
1681 p2p->next_af_subtype = act_frm->subtype + 1;
1682 /* increase dwell time to wait for RESP frame */
1683 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME);
1684 break;
1685 case P2P_PAF_PROVDIS_RSP:
1686 /* wpa_supplicant send go nego req right after prov disc */
1687 p2p->next_af_subtype = P2P_PAF_GON_REQ;
1688 /* increase dwell time to MED level */
1689 af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME);
1690 config_af_params->extra_listen = false;
1691 break;
1692 default:
1693 bphy_err(drvr, "Unknown p2p pub act frame subtype: %d\n",
1694 act_frm->subtype);
1695 err = -EINVAL;
1696 }
1697 return err;
1698 }
1699
brcmf_p2p_check_dwell_overflow(u32 requested_dwell,unsigned long dwell_jiffies)1700 static bool brcmf_p2p_check_dwell_overflow(u32 requested_dwell,
1701 unsigned long dwell_jiffies)
1702 {
1703 if ((requested_dwell & CUSTOM_RETRY_MASK) &&
1704 (jiffies_to_msecs(jiffies - dwell_jiffies) >
1705 (requested_dwell & ~CUSTOM_RETRY_MASK))) {
1706 brcmf_err("Action frame TX retry time over dwell time!\n");
1707 return true;
1708 }
1709 return false;
1710 }
1711 /**
1712 * brcmf_p2p_send_action_frame() - send action frame .
1713 *
1714 * @cfg: driver private data for cfg80211 interface.
1715 * @ndev: net device to transmit on.
1716 * @af_params: configuration data for action frame.
1717 */
brcmf_p2p_send_action_frame(struct brcmf_cfg80211_info * cfg,struct net_device * ndev,struct brcmf_fil_af_params_le * af_params)1718 bool brcmf_p2p_send_action_frame(struct brcmf_cfg80211_info *cfg,
1719 struct net_device *ndev,
1720 struct brcmf_fil_af_params_le *af_params)
1721 {
1722 struct brcmf_p2p_info *p2p = &cfg->p2p;
1723 struct brcmf_if *ifp = netdev_priv(ndev);
1724 struct brcmf_fil_action_frame_le *action_frame;
1725 struct brcmf_config_af_params config_af_params;
1726 struct afx_hdl *afx_hdl = &p2p->afx_hdl;
1727 struct brcmf_pub *drvr = cfg->pub;
1728 u16 action_frame_len;
1729 bool ack = false;
1730 u8 category;
1731 u8 action;
1732 s32 tx_retry;
1733 s32 extra_listen_time;
1734 uint delta_ms;
1735 unsigned long dwell_jiffies = 0;
1736 bool dwell_overflow = false;
1737
1738 u32 requested_dwell = le32_to_cpu(af_params->dwell_time);
1739 action_frame = &af_params->action_frame;
1740 action_frame_len = le16_to_cpu(action_frame->len);
1741
1742 brcmf_p2p_print_actframe(true, action_frame->data, action_frame_len);
1743
1744 /* Add the default dwell time. Dwell time to stay off-channel */
1745 /* to wait for a response action frame after transmitting an */
1746 /* GO Negotiation action frame */
1747 af_params->dwell_time = cpu_to_le32(P2P_AF_DWELL_TIME);
1748
1749 category = action_frame->data[DOT11_ACTION_CAT_OFF];
1750 action = action_frame->data[DOT11_ACTION_ACT_OFF];
1751
1752 /* initialize variables */
1753 p2p->next_af_subtype = P2P_PAF_SUBTYPE_INVALID;
1754 p2p->gon_req_action = false;
1755
1756 /* config parameters */
1757 config_af_params.mpc_onoff = -1;
1758 config_af_params.search_channel = false;
1759 config_af_params.extra_listen = false;
1760
1761 if (brcmf_p2p_is_pub_action(action_frame->data, action_frame_len)) {
1762 /* p2p public action frame process */
1763 if (brcmf_p2p_pub_af_tx(cfg, af_params, &config_af_params)) {
1764 /* Just send unknown subtype frame with */
1765 /* default parameters. */
1766 bphy_err(drvr, "P2P Public action frame, unknown subtype.\n");
1767 }
1768 } else if (brcmf_p2p_is_gas_action(action_frame->data,
1769 action_frame_len)) {
1770 /* service discovery process */
1771 if (action == P2PSD_ACTION_ID_GAS_IREQ ||
1772 action == P2PSD_ACTION_ID_GAS_CREQ) {
1773 /* configure service discovery query frame */
1774 config_af_params.search_channel = true;
1775
1776 /* save next af suptype to cancel */
1777 /* remaining dwell time */
1778 p2p->next_af_subtype = action + 1;
1779
1780 af_params->dwell_time =
1781 cpu_to_le32(P2P_AF_MED_DWELL_TIME);
1782 } else if (action == P2PSD_ACTION_ID_GAS_IRESP ||
1783 action == P2PSD_ACTION_ID_GAS_CRESP) {
1784 /* configure service discovery response frame */
1785 af_params->dwell_time =
1786 cpu_to_le32(P2P_AF_MIN_DWELL_TIME);
1787 } else {
1788 bphy_err(drvr, "Unknown action type: %d\n", action);
1789 goto exit;
1790 }
1791 } else if (brcmf_p2p_is_p2p_action(action_frame->data,
1792 action_frame_len)) {
1793 /* do not configure anything. it will be */
1794 /* sent with a default configuration */
1795 } else {
1796 bphy_err(drvr, "Unknown Frame: category 0x%x, action 0x%x\n",
1797 category, action);
1798 return false;
1799 }
1800
1801 /* if connecting on primary iface, sleep for a while before sending
1802 * af tx for VSDB
1803 */
1804 if (test_bit(BRCMF_VIF_STATUS_CONNECTING,
1805 &p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->sme_state))
1806 msleep(50);
1807
1808 /* if scan is ongoing, abort current scan. */
1809 if (test_bit(BRCMF_SCAN_STATUS_BUSY, &cfg->scan_status))
1810 brcmf_abort_scanning(cfg);
1811
1812 memcpy(afx_hdl->tx_dst_addr, action_frame->da, ETH_ALEN);
1813
1814 /* To make sure to send successfully action frame, turn off mpc */
1815 if (config_af_params.mpc_onoff == 0)
1816 brcmf_set_mpc(ifp, 0);
1817
1818 /* set status and destination address before sending af */
1819 if (p2p->next_af_subtype != P2P_PAF_SUBTYPE_INVALID) {
1820 /* set status to cancel the remained dwell time in rx process */
1821 set_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status);
1822 }
1823
1824 p2p->af_sent_channel = 0;
1825 set_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status);
1826 /* validate channel and p2p ies */
1827 if (config_af_params.search_channel &&
1828 IS_P2P_SOCIAL_CHANNEL(le32_to_cpu(af_params->channel)) &&
1829 p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif->saved_ie.probe_req_ie_len) {
1830 afx_hdl = &p2p->afx_hdl;
1831 afx_hdl->peer_listen_chan = le32_to_cpu(af_params->channel);
1832
1833 if (brcmf_p2p_af_searching_channel(p2p) ==
1834 P2P_INVALID_CHANNEL) {
1835 bphy_err(drvr, "Couldn't find peer's channel.\n");
1836 goto exit;
1837 }
1838
1839 /* Abort scan even for VSDB scenarios. Scan gets aborted in
1840 * firmware but after the check of piggyback algorithm. To take
1841 * care of current piggback algo, lets abort the scan here
1842 * itself.
1843 */
1844 brcmf_notify_escan_complete(cfg, ifp, true, true);
1845
1846 /* update channel */
1847 af_params->channel = cpu_to_le32(afx_hdl->peer_chan);
1848 }
1849 dwell_jiffies = jiffies;
1850 dwell_overflow = brcmf_p2p_check_dwell_overflow(requested_dwell,
1851 dwell_jiffies);
1852
1853 tx_retry = 0;
1854 while (!p2p->block_gon_req_tx &&
1855 (!ack) && (tx_retry < P2P_AF_TX_MAX_RETRY) &&
1856 !dwell_overflow) {
1857 if (af_params->channel)
1858 msleep(P2P_AF_RETRY_DELAY_TIME);
1859
1860 ack = !brcmf_p2p_tx_action_frame(p2p, af_params);
1861 tx_retry++;
1862 dwell_overflow = brcmf_p2p_check_dwell_overflow(requested_dwell,
1863 dwell_jiffies);
1864 }
1865 if (!ack) {
1866 bphy_err(drvr, "Failed to send Action Frame(retry %d)\n",
1867 tx_retry);
1868 clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status);
1869 }
1870
1871 exit:
1872 clear_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status);
1873
1874 /* WAR: sometimes dongle does not keep the dwell time of 'actframe'.
1875 * if we coundn't get the next action response frame and dongle does
1876 * not keep the dwell time, go to listen state again to get next action
1877 * response frame.
1878 */
1879 if (ack && config_af_params.extra_listen && !p2p->block_gon_req_tx &&
1880 test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status) &&
1881 p2p->af_sent_channel == afx_hdl->my_listen_chan) {
1882 delta_ms = jiffies_to_msecs(jiffies - p2p->af_tx_sent_jiffies);
1883 if (le32_to_cpu(af_params->dwell_time) > delta_ms)
1884 extra_listen_time = le32_to_cpu(af_params->dwell_time) -
1885 delta_ms;
1886 else
1887 extra_listen_time = 0;
1888 if (extra_listen_time > 50) {
1889 set_bit(BRCMF_P2P_STATUS_WAITING_NEXT_AF_LISTEN,
1890 &p2p->status);
1891 brcmf_dbg(INFO, "Wait more time! actual af time:%d, calculated extra listen:%d\n",
1892 le32_to_cpu(af_params->dwell_time),
1893 extra_listen_time);
1894 extra_listen_time += 100;
1895 if (!brcmf_p2p_discover_listen(p2p,
1896 p2p->af_sent_channel,
1897 extra_listen_time)) {
1898 unsigned long duration;
1899
1900 extra_listen_time += 100;
1901 duration = msecs_to_jiffies(extra_listen_time);
1902 wait_for_completion_timeout(&p2p->wait_next_af,
1903 duration);
1904 }
1905 clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_AF_LISTEN,
1906 &p2p->status);
1907 }
1908 }
1909
1910 if (p2p->block_gon_req_tx) {
1911 /* if ack is true, supplicant will wait more time(100ms).
1912 * so we will return it as a success to get more time .
1913 */
1914 p2p->block_gon_req_tx = false;
1915 ack = true;
1916 }
1917
1918 clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status);
1919 /* if all done, turn mpc on again */
1920 if (config_af_params.mpc_onoff == 1)
1921 brcmf_set_mpc(ifp, 1);
1922
1923 return ack;
1924 }
1925
1926 /**
1927 * brcmf_p2p_notify_rx_mgmt_p2p_probereq() - Event handler for p2p probe req.
1928 *
1929 * @ifp: interface pointer for which event was received.
1930 * @e: even message.
1931 * @data: payload of event message (probe request).
1932 */
brcmf_p2p_notify_rx_mgmt_p2p_probereq(struct brcmf_if * ifp,const struct brcmf_event_msg * e,void * data)1933 s32 brcmf_p2p_notify_rx_mgmt_p2p_probereq(struct brcmf_if *ifp,
1934 const struct brcmf_event_msg *e,
1935 void *data)
1936 {
1937 struct brcmf_cfg80211_info *cfg = ifp->drvr->config;
1938 struct brcmf_p2p_info *p2p = &cfg->p2p;
1939 struct afx_hdl *afx_hdl = &p2p->afx_hdl;
1940 struct brcmf_cfg80211_vif *vif = ifp->vif;
1941 struct brcmf_rx_mgmt_data *rxframe = (struct brcmf_rx_mgmt_data *)data;
1942 struct brcmu_chan ch;
1943 u8 *mgmt_frame;
1944 u32 mgmt_frame_len;
1945 s32 freq;
1946 u16 mgmt_type;
1947
1948 brcmf_dbg(INFO, "Enter: event %d reason %d\n", e->event_code,
1949 e->reason);
1950
1951 if (e->datalen < sizeof(*rxframe)) {
1952 brcmf_dbg(SCAN, "Event data to small. Ignore\n");
1953 return 0;
1954 }
1955
1956 ch.chspec = be16_to_cpu(rxframe->chanspec);
1957 cfg->d11inf.decchspec(&ch);
1958
1959 if (test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status) &&
1960 (ether_addr_equal(afx_hdl->tx_dst_addr, e->addr))) {
1961 afx_hdl->peer_chan = ch.control_ch_num;
1962 brcmf_dbg(INFO, "PROBE REQUEST: Peer found, channel=%d\n",
1963 afx_hdl->peer_chan);
1964 complete(&afx_hdl->act_frm_scan);
1965 }
1966
1967 /* Firmware sends us two proberesponses for each idx one. At the */
1968 /* moment anything but bsscfgidx 0 is passed up to supplicant */
1969 if (e->bsscfgidx == 0)
1970 return 0;
1971
1972 /* Filter any P2P probe reqs arriving during the GO-NEG Phase */
1973 if (test_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status)) {
1974 brcmf_dbg(INFO, "Filtering P2P probe_req in GO-NEG phase\n");
1975 return 0;
1976 }
1977
1978 /* Check if wpa_supplicant has registered for this frame */
1979 brcmf_dbg(INFO, "vif->mgmt_rx_reg %04x\n", vif->mgmt_rx_reg);
1980 mgmt_type = (IEEE80211_STYPE_PROBE_REQ & IEEE80211_FCTL_STYPE) >> 4;
1981 if ((vif->mgmt_rx_reg & BIT(mgmt_type)) == 0)
1982 return 0;
1983
1984 mgmt_frame = (u8 *)(rxframe + 1);
1985 mgmt_frame_len = e->datalen - sizeof(*rxframe);
1986 freq = ieee80211_channel_to_frequency(ch.control_ch_num,
1987 ch.band == BRCMU_CHAN_BAND_2G ?
1988 NL80211_BAND_2GHZ :
1989 NL80211_BAND_5GHZ);
1990
1991 cfg80211_rx_mgmt(&vif->wdev, freq, 0, mgmt_frame, mgmt_frame_len, 0);
1992
1993 brcmf_dbg(INFO, "mgmt_frame_len (%d) , e->datalen (%d), chanspec (%04x), freq (%d)\n",
1994 mgmt_frame_len, e->datalen, ch.chspec, freq);
1995
1996 return 0;
1997 }
1998
1999
2000 /**
2001 * brcmf_p2p_get_current_chanspec() - Get current operation channel.
2002 *
2003 * @p2p: P2P specific data.
2004 * @chanspec: chanspec to be returned.
2005 */
brcmf_p2p_get_current_chanspec(struct brcmf_p2p_info * p2p,u16 * chanspec)2006 static void brcmf_p2p_get_current_chanspec(struct brcmf_p2p_info *p2p,
2007 u16 *chanspec)
2008 {
2009 struct brcmf_if *ifp;
2010 u8 mac_addr[ETH_ALEN];
2011 struct brcmu_chan ch;
2012 struct brcmf_bss_info_le *bi;
2013 u8 *buf;
2014
2015 ifp = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->ifp;
2016
2017 if (brcmf_fil_cmd_data_get(ifp, BRCMF_C_GET_BSSID, mac_addr,
2018 ETH_ALEN) == 0) {
2019 buf = kzalloc(WL_BSS_INFO_MAX, GFP_KERNEL);
2020 if (buf != NULL) {
2021 *(__le32 *)buf = cpu_to_le32(WL_BSS_INFO_MAX);
2022 if (brcmf_fil_cmd_data_get(ifp, BRCMF_C_GET_BSS_INFO,
2023 buf, WL_BSS_INFO_MAX) == 0) {
2024 bi = (struct brcmf_bss_info_le *)(buf + 4);
2025 *chanspec = le16_to_cpu(bi->chanspec);
2026 kfree(buf);
2027 return;
2028 }
2029 kfree(buf);
2030 }
2031 }
2032 /* Use default channel for P2P */
2033 ch.chnum = BRCMF_P2P_TEMP_CHAN;
2034 ch.bw = BRCMU_CHAN_BW_20;
2035 p2p->cfg->d11inf.encchspec(&ch);
2036 *chanspec = ch.chspec;
2037 }
2038
2039 /**
2040 * brcmf_p2p_ifchange - Change a P2P Role.
2041 * @cfg: driver private data for cfg80211 interface.
2042 * @if_type: interface type.
2043 * Returns 0 if success.
2044 */
brcmf_p2p_ifchange(struct brcmf_cfg80211_info * cfg,enum brcmf_fil_p2p_if_types if_type)2045 int brcmf_p2p_ifchange(struct brcmf_cfg80211_info *cfg,
2046 enum brcmf_fil_p2p_if_types if_type)
2047 {
2048 struct brcmf_p2p_info *p2p = &cfg->p2p;
2049 struct brcmf_pub *drvr = cfg->pub;
2050 struct brcmf_cfg80211_vif *vif;
2051 struct brcmf_fil_p2p_if_le if_request;
2052 s32 err;
2053 u16 chanspec;
2054
2055 brcmf_dbg(TRACE, "Enter\n");
2056
2057 vif = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif;
2058 if (!vif) {
2059 bphy_err(drvr, "vif for P2PAPI_BSSCFG_PRIMARY does not exist\n");
2060 return -EPERM;
2061 }
2062 brcmf_notify_escan_complete(cfg, vif->ifp, true, true);
2063 vif = p2p->bss_idx[P2PAPI_BSSCFG_CONNECTION].vif;
2064 if (!vif) {
2065 bphy_err(drvr, "vif for P2PAPI_BSSCFG_CONNECTION does not exist\n");
2066 return -EPERM;
2067 }
2068 brcmf_set_mpc(vif->ifp, 0);
2069
2070 /* In concurrency case, STA may be already associated in a particular */
2071 /* channel. so retrieve the current channel of primary interface and */
2072 /* then start the virtual interface on that. */
2073 brcmf_p2p_get_current_chanspec(p2p, &chanspec);
2074
2075 if_request.type = cpu_to_le16((u16)if_type);
2076 if_request.chspec = cpu_to_le16(chanspec);
2077 memcpy(if_request.addr, p2p->conn_int_addr, sizeof(if_request.addr));
2078
2079 brcmf_cfg80211_arm_vif_event(cfg, vif);
2080 err = brcmf_fil_iovar_data_set(vif->ifp, "p2p_ifupd", &if_request,
2081 sizeof(if_request));
2082 if (err) {
2083 bphy_err(drvr, "p2p_ifupd FAILED, err=%d\n", err);
2084 brcmf_cfg80211_arm_vif_event(cfg, NULL);
2085 return err;
2086 }
2087 err = brcmf_cfg80211_wait_vif_event(cfg, BRCMF_E_IF_CHANGE,
2088 BRCMF_VIF_EVENT_TIMEOUT);
2089 brcmf_cfg80211_arm_vif_event(cfg, NULL);
2090 if (!err) {
2091 bphy_err(drvr, "No BRCMF_E_IF_CHANGE event received\n");
2092 return -EIO;
2093 }
2094
2095 err = brcmf_fil_cmd_int_set(vif->ifp, BRCMF_C_SET_SCB_TIMEOUT,
2096 BRCMF_SCB_TIMEOUT_VALUE);
2097
2098 return err;
2099 }
2100
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)2101 static int brcmf_p2p_request_p2p_if(struct brcmf_p2p_info *p2p,
2102 struct brcmf_if *ifp, u8 ea[ETH_ALEN],
2103 enum brcmf_fil_p2p_if_types iftype)
2104 {
2105 struct brcmf_fil_p2p_if_le if_request;
2106 int err;
2107 u16 chanspec;
2108
2109 /* we need a default channel */
2110 brcmf_p2p_get_current_chanspec(p2p, &chanspec);
2111
2112 /* fill the firmware request */
2113 memcpy(if_request.addr, ea, ETH_ALEN);
2114 if_request.type = cpu_to_le16((u16)iftype);
2115 if_request.chspec = cpu_to_le16(chanspec);
2116
2117 err = brcmf_fil_iovar_data_set(ifp, "p2p_ifadd", &if_request,
2118 sizeof(if_request));
2119
2120 return err;
2121 }
2122
brcmf_p2p_disable_p2p_if(struct brcmf_cfg80211_vif * vif)2123 static int brcmf_p2p_disable_p2p_if(struct brcmf_cfg80211_vif *vif)
2124 {
2125 struct brcmf_cfg80211_info *cfg = wdev_to_cfg(&vif->wdev);
2126 struct net_device *pri_ndev = cfg_to_ndev(cfg);
2127 struct brcmf_if *ifp = netdev_priv(pri_ndev);
2128 const u8 *addr = vif->wdev.netdev->dev_addr;
2129
2130 return brcmf_fil_iovar_data_set(ifp, "p2p_ifdis", addr, ETH_ALEN);
2131 }
2132
brcmf_p2p_release_p2p_if(struct brcmf_cfg80211_vif * vif)2133 static int brcmf_p2p_release_p2p_if(struct brcmf_cfg80211_vif *vif)
2134 {
2135 struct brcmf_cfg80211_info *cfg = wdev_to_cfg(&vif->wdev);
2136 struct net_device *pri_ndev = cfg_to_ndev(cfg);
2137 struct brcmf_if *ifp = netdev_priv(pri_ndev);
2138 const u8 *addr = vif->wdev.netdev->dev_addr;
2139
2140 return brcmf_fil_iovar_data_set(ifp, "p2p_ifdel", addr, ETH_ALEN);
2141 }
2142
2143 /**
2144 * brcmf_p2p_create_p2pdev() - create a P2P_DEVICE virtual interface.
2145 *
2146 * @p2p: P2P specific data.
2147 * @wiphy: wiphy device of new interface.
2148 * @addr: mac address for this new interface.
2149 */
brcmf_p2p_create_p2pdev(struct brcmf_p2p_info * p2p,struct wiphy * wiphy,u8 * addr)2150 static struct wireless_dev *brcmf_p2p_create_p2pdev(struct brcmf_p2p_info *p2p,
2151 struct wiphy *wiphy,
2152 u8 *addr)
2153 {
2154 struct brcmf_pub *drvr = p2p->cfg->pub;
2155 struct brcmf_cfg80211_vif *p2p_vif;
2156 struct brcmf_if *p2p_ifp;
2157 struct brcmf_if *pri_ifp;
2158 int err;
2159 u32 bsscfgidx;
2160
2161 if (p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif)
2162 return ERR_PTR(-ENOSPC);
2163
2164 p2p_vif = brcmf_alloc_vif(p2p->cfg, NL80211_IFTYPE_P2P_DEVICE);
2165 if (IS_ERR(p2p_vif)) {
2166 bphy_err(drvr, "could not create discovery vif\n");
2167 return (struct wireless_dev *)p2p_vif;
2168 }
2169
2170 pri_ifp = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->ifp;
2171
2172 /* firmware requires unique mac address for p2pdev interface */
2173 if (addr && ether_addr_equal(addr, pri_ifp->mac_addr)) {
2174 bphy_err(drvr, "discovery vif must be different from primary interface\n");
2175 err = -EINVAL;
2176 goto fail;
2177 }
2178
2179 brcmf_p2p_generate_bss_mac(p2p, addr);
2180 brcmf_p2p_set_firmware(pri_ifp, p2p->dev_addr);
2181
2182 brcmf_cfg80211_arm_vif_event(p2p->cfg, p2p_vif);
2183 brcmf_fweh_p2pdev_setup(pri_ifp, true);
2184
2185 /* Initialize P2P Discovery in the firmware */
2186 err = brcmf_fil_iovar_int_set(pri_ifp, "p2p_disc", 1);
2187 if (err < 0) {
2188 bphy_err(drvr, "set p2p_disc error\n");
2189 brcmf_fweh_p2pdev_setup(pri_ifp, false);
2190 brcmf_cfg80211_arm_vif_event(p2p->cfg, NULL);
2191 goto fail;
2192 }
2193
2194 /* wait for firmware event */
2195 err = brcmf_cfg80211_wait_vif_event(p2p->cfg, BRCMF_E_IF_ADD,
2196 BRCMF_VIF_EVENT_TIMEOUT);
2197 brcmf_cfg80211_arm_vif_event(p2p->cfg, NULL);
2198 brcmf_fweh_p2pdev_setup(pri_ifp, false);
2199 if (!err) {
2200 bphy_err(drvr, "timeout occurred\n");
2201 err = -EIO;
2202 goto fail;
2203 }
2204
2205 /* discovery interface created */
2206 p2p_ifp = p2p_vif->ifp;
2207 p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif = p2p_vif;
2208 memcpy(p2p_ifp->mac_addr, p2p->dev_addr, ETH_ALEN);
2209 memcpy(&p2p_vif->wdev.address, p2p->dev_addr, sizeof(p2p->dev_addr));
2210
2211 /* verify bsscfg index for P2P discovery */
2212 err = brcmf_fil_iovar_int_get(pri_ifp, "p2p_dev", &bsscfgidx);
2213 if (err < 0) {
2214 bphy_err(drvr, "retrieving discover bsscfg index failed\n");
2215 goto fail;
2216 }
2217
2218 WARN_ON(p2p_ifp->bsscfgidx != bsscfgidx);
2219
2220 init_completion(&p2p->send_af_done);
2221 INIT_WORK(&p2p->afx_hdl.afx_work, brcmf_p2p_afx_handler);
2222 init_completion(&p2p->afx_hdl.act_frm_scan);
2223 init_completion(&p2p->wait_next_af);
2224
2225 return &p2p_vif->wdev;
2226
2227 fail:
2228 brcmf_free_vif(p2p_vif);
2229 return ERR_PTR(err);
2230 }
2231
brcmf_p2p_get_conn_idx(struct brcmf_cfg80211_info * cfg)2232 static int brcmf_p2p_get_conn_idx(struct brcmf_cfg80211_info *cfg)
2233 {
2234 int i;
2235 struct brcmf_if *ifp = netdev_priv(cfg_to_ndev(cfg));
2236
2237 if (!ifp)
2238 return -ENODEV;
2239
2240 for (i = P2PAPI_BSSCFG_CONNECTION; i < P2PAPI_BSSCFG_MAX; i++) {
2241 if (!cfg->p2p.bss_idx[i].vif) {
2242 if (i == P2PAPI_BSSCFG_CONNECTION2 &&
2243 !(brcmf_feat_is_enabled(ifp, BRCMF_FEAT_RSDB))) {
2244 brcmf_err("Multi p2p not supported");
2245 return -EIO;
2246 }
2247 return i;
2248 }
2249 }
2250 return -EIO;
2251 }
2252
2253 /**
2254 * brcmf_p2p_add_vif() - create a new P2P virtual interface.
2255 *
2256 * @wiphy: wiphy device of new interface.
2257 * @name: name of the new interface.
2258 * @name_assign_type: origin of the interface name
2259 * @type: nl80211 interface type.
2260 * @params: contains mac address for P2P device.
2261 */
brcmf_p2p_add_vif(struct wiphy * wiphy,const char * name,unsigned char name_assign_type,enum nl80211_iftype type,struct vif_params * params)2262 struct wireless_dev *brcmf_p2p_add_vif(struct wiphy *wiphy, const char *name,
2263 unsigned char name_assign_type,
2264 enum nl80211_iftype type,
2265 struct vif_params *params)
2266 {
2267 struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
2268 struct brcmf_if *ifp = netdev_priv(cfg_to_ndev(cfg));
2269 struct brcmf_pub *drvr = cfg->pub;
2270 struct brcmf_cfg80211_vif *vif;
2271 enum brcmf_fil_p2p_if_types iftype;
2272 int err = 0;
2273 int connidx;
2274 u8 *p2p_intf_addr;
2275
2276 if (brcmf_cfg80211_vif_event_armed(cfg))
2277 return ERR_PTR(-EBUSY);
2278
2279 brcmf_dbg(INFO, "adding vif \"%s\" (type=%d)\n", name, type);
2280
2281 switch (type) {
2282 case NL80211_IFTYPE_P2P_CLIENT:
2283 iftype = BRCMF_FIL_P2P_IF_CLIENT;
2284 break;
2285 case NL80211_IFTYPE_P2P_GO:
2286 iftype = BRCMF_FIL_P2P_IF_GO;
2287 break;
2288 case NL80211_IFTYPE_P2P_DEVICE:
2289 return brcmf_p2p_create_p2pdev(&cfg->p2p, wiphy,
2290 params->macaddr);
2291 default:
2292 return ERR_PTR(-EOPNOTSUPP);
2293 }
2294
2295 vif = brcmf_alloc_vif(cfg, type);
2296 if (IS_ERR(vif))
2297 return (struct wireless_dev *)vif;
2298 brcmf_cfg80211_arm_vif_event(cfg, vif);
2299
2300 connidx = brcmf_p2p_get_conn_idx(cfg);
2301
2302 if (connidx == P2PAPI_BSSCFG_CONNECTION)
2303 p2p_intf_addr = cfg->p2p.conn_int_addr;
2304 else if (connidx == P2PAPI_BSSCFG_CONNECTION2)
2305 p2p_intf_addr = cfg->p2p.conn2_int_addr;
2306 else
2307 err = -EINVAL;
2308
2309 if (!err)
2310 err = brcmf_p2p_request_p2p_if(&cfg->p2p, ifp,
2311 p2p_intf_addr, iftype);
2312
2313 if (err) {
2314 brcmf_err("request p2p interface failed\n");
2315 brcmf_cfg80211_arm_vif_event(cfg, NULL);
2316 goto fail;
2317 }
2318
2319 /* wait for firmware event */
2320 err = brcmf_cfg80211_wait_vif_event(cfg, BRCMF_E_IF_ADD,
2321 BRCMF_VIF_EVENT_TIMEOUT);
2322 brcmf_cfg80211_arm_vif_event(cfg, NULL);
2323 if (!err) {
2324 bphy_err(drvr, "timeout occurred\n");
2325 err = -EIO;
2326 goto fail;
2327 }
2328
2329 /* interface created in firmware */
2330 ifp = vif->ifp;
2331 if (!ifp) {
2332 bphy_err(drvr, "no if pointer provided\n");
2333 err = -ENOENT;
2334 goto fail;
2335 }
2336
2337 strscpy(ifp->ndev->name, name, sizeof(ifp->ndev->name));
2338 ifp->ndev->name_assign_type = name_assign_type;
2339 err = brcmf_net_attach(ifp, true);
2340 if (err) {
2341 bphy_err(drvr, "Registering netdevice failed\n");
2342 free_netdev(ifp->ndev);
2343 goto fail;
2344 }
2345
2346 cfg->p2p.bss_idx[connidx].vif = vif;
2347 /* Disable firmware roaming for P2P interface */
2348 brcmf_fil_iovar_int_set(ifp, "roam_off", 1);
2349 if (iftype == BRCMF_FIL_P2P_IF_GO) {
2350 /* set station timeout for p2p */
2351 brcmf_fil_cmd_int_set(ifp, BRCMF_C_SET_SCB_TIMEOUT,
2352 BRCMF_SCB_TIMEOUT_VALUE);
2353 }
2354 return &ifp->vif->wdev;
2355
2356 fail:
2357 brcmf_free_vif(vif);
2358 return ERR_PTR(err);
2359 }
2360
2361 /**
2362 * brcmf_p2p_del_vif() - delete a P2P virtual interface.
2363 *
2364 * @wiphy: wiphy device of interface.
2365 * @wdev: wireless device of interface.
2366 */
brcmf_p2p_del_vif(struct wiphy * wiphy,struct wireless_dev * wdev)2367 int brcmf_p2p_del_vif(struct wiphy *wiphy, struct wireless_dev *wdev)
2368 {
2369 struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
2370 struct brcmf_p2p_info *p2p = &cfg->p2p;
2371 struct brcmf_cfg80211_vif *vif;
2372 enum nl80211_iftype iftype;
2373 bool wait_for_disable = false;
2374 int err;
2375
2376 brcmf_dbg(TRACE, "delete P2P vif\n");
2377 vif = container_of(wdev, struct brcmf_cfg80211_vif, wdev);
2378
2379 iftype = vif->wdev.iftype;
2380 brcmf_cfg80211_arm_vif_event(cfg, vif);
2381 switch (iftype) {
2382 case NL80211_IFTYPE_P2P_CLIENT:
2383 if (test_bit(BRCMF_VIF_STATUS_DISCONNECTING, &vif->sme_state))
2384 wait_for_disable = true;
2385 break;
2386
2387 case NL80211_IFTYPE_P2P_GO:
2388 if (!brcmf_p2p_disable_p2p_if(vif))
2389 wait_for_disable = true;
2390 break;
2391
2392 case NL80211_IFTYPE_P2P_DEVICE:
2393 if (!p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif)
2394 return 0;
2395 brcmf_p2p_cancel_remain_on_channel(vif->ifp);
2396 brcmf_p2p_deinit_discovery(p2p);
2397 break;
2398
2399 default:
2400 return -ENOTSUPP;
2401 }
2402
2403 clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status);
2404 brcmf_dbg(INFO, "P2P: GO_NEG_PHASE status cleared\n");
2405
2406 if (wait_for_disable)
2407 wait_for_completion_timeout(&cfg->vif_disabled,
2408 BRCMF_P2P_DISABLE_TIMEOUT);
2409
2410 err = 0;
2411 if (iftype != NL80211_IFTYPE_P2P_DEVICE) {
2412 brcmf_vif_clear_mgmt_ies(vif);
2413 err = brcmf_p2p_release_p2p_if(vif);
2414 }
2415 if (!err) {
2416 /* wait for firmware event */
2417 err = brcmf_cfg80211_wait_vif_event(cfg, BRCMF_E_IF_DEL,
2418 BRCMF_VIF_EVENT_TIMEOUT);
2419 if (!err)
2420 err = -EIO;
2421 else
2422 err = 0;
2423 }
2424 brcmf_remove_interface(vif->ifp, true);
2425
2426 brcmf_cfg80211_arm_vif_event(cfg, NULL);
2427 if (iftype != NL80211_IFTYPE_P2P_DEVICE) {
2428 if (vif == p2p->bss_idx[P2PAPI_BSSCFG_CONNECTION].vif)
2429 p2p->bss_idx[P2PAPI_BSSCFG_CONNECTION].vif = NULL;
2430 if (vif == p2p->bss_idx[P2PAPI_BSSCFG_CONNECTION2].vif)
2431 p2p->bss_idx[P2PAPI_BSSCFG_CONNECTION2].vif = NULL;
2432 }
2433
2434 return err;
2435 }
2436
brcmf_p2p_ifp_removed(struct brcmf_if * ifp,bool locked)2437 void brcmf_p2p_ifp_removed(struct brcmf_if *ifp, bool locked)
2438 {
2439 struct brcmf_cfg80211_info *cfg;
2440 struct brcmf_cfg80211_vif *vif;
2441
2442 brcmf_dbg(INFO, "P2P: device interface removed\n");
2443 vif = ifp->vif;
2444 cfg = wdev_to_cfg(&vif->wdev);
2445 cfg->p2p.bss_idx[P2PAPI_BSSCFG_DEVICE].vif = NULL;
2446 if (!locked) {
2447 rtnl_lock();
2448 wiphy_lock(cfg->wiphy);
2449 cfg80211_unregister_wdev(&vif->wdev);
2450 wiphy_unlock(cfg->wiphy);
2451 rtnl_unlock();
2452 } else {
2453 cfg80211_unregister_wdev(&vif->wdev);
2454 }
2455 brcmf_free_vif(vif);
2456 }
2457
brcmf_p2p_start_device(struct wiphy * wiphy,struct wireless_dev * wdev)2458 int brcmf_p2p_start_device(struct wiphy *wiphy, struct wireless_dev *wdev)
2459 {
2460 struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
2461 struct brcmf_p2p_info *p2p = &cfg->p2p;
2462 struct brcmf_cfg80211_vif *vif;
2463 int err;
2464
2465 vif = container_of(wdev, struct brcmf_cfg80211_vif, wdev);
2466 mutex_lock(&cfg->usr_sync);
2467 err = brcmf_p2p_enable_discovery(p2p);
2468 if (!err)
2469 set_bit(BRCMF_VIF_STATUS_READY, &vif->sme_state);
2470 mutex_unlock(&cfg->usr_sync);
2471 return err;
2472 }
2473
brcmf_p2p_stop_device(struct wiphy * wiphy,struct wireless_dev * wdev)2474 void brcmf_p2p_stop_device(struct wiphy *wiphy, struct wireless_dev *wdev)
2475 {
2476 struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
2477 struct brcmf_p2p_info *p2p = &cfg->p2p;
2478 struct brcmf_cfg80211_vif *vif;
2479
2480 vif = container_of(wdev, struct brcmf_cfg80211_vif, wdev);
2481 /* This call can be result of the unregister_wdev call. In that case
2482 * we dont want to do anything anymore. Just return. The config vif
2483 * will have been cleared at this point.
2484 */
2485 if (p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif == vif) {
2486 mutex_lock(&cfg->usr_sync);
2487 /* Set the discovery state to SCAN */
2488 (void)brcmf_p2p_set_discover_state(vif->ifp,
2489 WL_P2P_DISC_ST_SCAN, 0, 0);
2490 brcmf_abort_scanning(cfg);
2491 clear_bit(BRCMF_VIF_STATUS_READY, &vif->sme_state);
2492 mutex_unlock(&cfg->usr_sync);
2493 }
2494 }
2495
2496 /**
2497 * brcmf_p2p_attach() - attach for P2P.
2498 *
2499 * @cfg: driver private data for cfg80211 interface.
2500 * @p2pdev_forced: create p2p device interface at attach.
2501 */
brcmf_p2p_attach(struct brcmf_cfg80211_info * cfg,bool p2pdev_forced)2502 s32 brcmf_p2p_attach(struct brcmf_cfg80211_info *cfg, bool p2pdev_forced)
2503 {
2504 struct brcmf_pub *drvr = cfg->pub;
2505 struct brcmf_p2p_info *p2p;
2506 struct brcmf_if *pri_ifp;
2507 s32 err = 0;
2508 void *err_ptr;
2509
2510 p2p = &cfg->p2p;
2511 p2p->cfg = cfg;
2512
2513 pri_ifp = brcmf_get_ifp(cfg->pub, 0);
2514 p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif = pri_ifp->vif;
2515
2516 if (p2pdev_forced) {
2517 err_ptr = brcmf_p2p_create_p2pdev(p2p, NULL, NULL);
2518 if (IS_ERR(err_ptr)) {
2519 bphy_err(drvr, "P2P device creation failed.\n");
2520 err = PTR_ERR(err_ptr);
2521 }
2522 } else {
2523 p2p->p2pdev_dynamically = true;
2524 }
2525 return err;
2526 }
2527
2528 /**
2529 * brcmf_p2p_detach() - detach P2P.
2530 *
2531 * @p2p: P2P specific data.
2532 */
brcmf_p2p_detach(struct brcmf_p2p_info * p2p)2533 void brcmf_p2p_detach(struct brcmf_p2p_info *p2p)
2534 {
2535 struct brcmf_cfg80211_vif *vif;
2536
2537 vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif;
2538 if (vif != NULL) {
2539 brcmf_p2p_cancel_remain_on_channel(vif->ifp);
2540 brcmf_p2p_deinit_discovery(p2p);
2541 brcmf_remove_interface(vif->ifp, false);
2542 }
2543 /* just set it all to zero */
2544 memset(p2p, 0, sizeof(*p2p));
2545 }
2546
2547