source: src/linux/universal/linux-4.9/drivers/net/wireless/broadcom/brcm80211/brcmfmac/p2p.c @ 31859

Last change on this file since 31859 was 31859, checked in by brainslayer, 6 weeks ago

kernel update

File size: 69.0 KB
Line 
1/*
2 * Copyright (c) 2012 Broadcom Corporation
3 *
4 * Permission to use, copy, modify, and/or distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
7 *
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
11 * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
13 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
14 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15 */
16#include <linux/slab.h>
17#include <linux/netdevice.h>
18#include <linux/etherdevice.h>
19#include <linux/rtnetlink.h>
20#include <net/cfg80211.h>
21
22#include <brcmu_wifi.h>
23#include <brcmu_utils.h>
24#include <defs.h>
25#include "core.h"
26#include "debug.h"
27#include "fwil.h"
28#include "fwil_types.h"
29#include "p2p.h"
30#include "cfg80211.h"
31
32/* parameters used for p2p escan */
33#define P2PAPI_SCAN_NPROBES 1
34#define P2PAPI_SCAN_DWELL_TIME_MS 80
35#define P2PAPI_SCAN_SOCIAL_DWELL_TIME_MS 40
36#define P2PAPI_SCAN_HOME_TIME_MS 60
37#define P2PAPI_SCAN_NPROBS_TIME_MS 30
38#define P2PAPI_SCAN_AF_SEARCH_DWELL_TIME_MS 100
39#define WL_SCAN_CONNECT_DWELL_TIME_MS 200
40#define WL_SCAN_JOIN_PROBE_INTERVAL_MS 20
41
42#define BRCMF_P2P_WILDCARD_SSID         "DIRECT-"
43#define BRCMF_P2P_WILDCARD_SSID_LEN     (sizeof(BRCMF_P2P_WILDCARD_SSID) - 1)
44
45#define SOCIAL_CHAN_1           1
46#define SOCIAL_CHAN_2           6
47#define SOCIAL_CHAN_3           11
48#define IS_P2P_SOCIAL_CHANNEL(channel) ((channel == SOCIAL_CHAN_1) || \
49                                         (channel == SOCIAL_CHAN_2) || \
50                                         (channel == SOCIAL_CHAN_3))
51#define BRCMF_P2P_TEMP_CHAN     SOCIAL_CHAN_3
52#define SOCIAL_CHAN_CNT         3
53#define AF_PEER_SEARCH_CNT      2
54
55#define BRCMF_SCB_TIMEOUT_VALUE 20
56
57#define P2P_VER                 9       /* P2P version: 9=WiFi P2P v1.0 */
58#define P2P_PUB_AF_CATEGORY     0x04
59#define P2P_PUB_AF_ACTION       0x09
60#define P2P_AF_CATEGORY         0x7f
61#define P2P_OUI                 "\x50\x6F\x9A"  /* P2P OUI */
62#define P2P_OUI_LEN             3               /* P2P OUI length */
63
64/* Action Frame Constants */
65#define DOT11_ACTION_HDR_LEN    2       /* action frame category + action */
66#define DOT11_ACTION_CAT_OFF    0       /* category offset */
67#define DOT11_ACTION_ACT_OFF    1       /* action offset */
68
69#define P2P_AF_DWELL_TIME               200
70#define P2P_AF_MIN_DWELL_TIME           100
71#define P2P_AF_MED_DWELL_TIME           400
72#define P2P_AF_LONG_DWELL_TIME          1000
73#define P2P_AF_TX_MAX_RETRY             1
74#define P2P_AF_MAX_WAIT_TIME            msecs_to_jiffies(2000)
75#define P2P_INVALID_CHANNEL             -1
76#define P2P_CHANNEL_SYNC_RETRY          5
77#define P2P_AF_FRM_SCAN_MAX_WAIT        msecs_to_jiffies(1500)
78#define P2P_DEFAULT_SLEEP_TIME_VSDB     200
79
80/* WiFi P2P Public Action Frame OUI Subtypes */
81#define P2P_PAF_GON_REQ         0       /* Group Owner Negotiation Req */
82#define P2P_PAF_GON_RSP         1       /* Group Owner Negotiation Rsp */
83#define P2P_PAF_GON_CONF        2       /* Group Owner Negotiation Confirm */
84#define P2P_PAF_INVITE_REQ      3       /* P2P Invitation Request */
85#define P2P_PAF_INVITE_RSP      4       /* P2P Invitation Response */
86#define P2P_PAF_DEVDIS_REQ      5       /* Device Discoverability Request */
87#define P2P_PAF_DEVDIS_RSP      6       /* Device Discoverability Response */
88#define P2P_PAF_PROVDIS_REQ     7       /* Provision Discovery Request */
89#define P2P_PAF_PROVDIS_RSP     8       /* Provision Discovery Response */
90#define P2P_PAF_SUBTYPE_INVALID 255     /* Invalid Subtype */
91
92/* WiFi P2P Action Frame OUI Subtypes */
93#define P2P_AF_NOTICE_OF_ABSENCE        0       /* Notice of Absence */
94#define P2P_AF_PRESENCE_REQ             1       /* P2P Presence Request */
95#define P2P_AF_PRESENCE_RSP             2       /* P2P Presence Response */
96#define P2P_AF_GO_DISC_REQ              3       /* GO Discoverability Request */
97
98/* P2P Service Discovery related */
99#define P2PSD_ACTION_CATEGORY           0x04    /* Public action frame */
100#define P2PSD_ACTION_ID_GAS_IREQ        0x0a    /* GAS Initial Request AF */
101#define P2PSD_ACTION_ID_GAS_IRESP       0x0b    /* GAS Initial Response AF */
102#define P2PSD_ACTION_ID_GAS_CREQ        0x0c    /* GAS Comback Request AF */
103#define P2PSD_ACTION_ID_GAS_CRESP       0x0d    /* GAS Comback Response AF */
104
105#define BRCMF_P2P_DISABLE_TIMEOUT       msecs_to_jiffies(500)
106/**
107 * struct brcmf_p2p_disc_st_le - set discovery state in firmware.
108 *
109 * @state: requested discovery state (see enum brcmf_p2p_disc_state).
110 * @chspec: channel parameter for %WL_P2P_DISC_ST_LISTEN state.
111 * @dwell: dwell time in ms for %WL_P2P_DISC_ST_LISTEN state.
112 */
113struct brcmf_p2p_disc_st_le {
114        u8 state;
115        __le16 chspec;
116        __le16 dwell;
117};
118
119/**
120 * enum brcmf_p2p_disc_state - P2P discovery state values
121 *
122 * @WL_P2P_DISC_ST_SCAN: P2P discovery with wildcard SSID and P2P IE.
123 * @WL_P2P_DISC_ST_LISTEN: P2P discovery off-channel for specified time.
124 * @WL_P2P_DISC_ST_SEARCH: P2P discovery with P2P wildcard SSID and P2P IE.
125 */
126enum brcmf_p2p_disc_state {
127        WL_P2P_DISC_ST_SCAN,
128        WL_P2P_DISC_ST_LISTEN,
129        WL_P2P_DISC_ST_SEARCH
130};
131
132/**
133 * struct brcmf_p2p_scan_le - P2P specific scan request.
134 *
135 * @type: type of scan method requested (values: 'E' or 'S').
136 * @reserved: reserved (ignored).
137 * @eparams: parameters used for type 'E'.
138 * @sparams: parameters used for type 'S'.
139 */
140struct brcmf_p2p_scan_le {
141        u8 type;
142        u8 reserved[3];
143        union {
144                struct brcmf_escan_params_le eparams;
145                struct brcmf_scan_params_le sparams;
146        };
147};
148
149/**
150 * struct brcmf_p2p_pub_act_frame - WiFi P2P Public Action Frame
151 *
152 * @category: P2P_PUB_AF_CATEGORY
153 * @action: P2P_PUB_AF_ACTION
154 * @oui[3]: P2P_OUI
155 * @oui_type: OUI type - P2P_VER
156 * @subtype: OUI subtype - P2P_TYPE_*
157 * @dialog_token: nonzero, identifies req/rsp transaction
158 * @elts[1]: Variable length information elements.
159 */
160struct brcmf_p2p_pub_act_frame {
161        u8      category;
162        u8      action;
163        u8      oui[3];
164        u8      oui_type;
165        u8      subtype;
166        u8      dialog_token;
167        u8      elts[1];
168};
169
170/**
171 * struct brcmf_p2p_action_frame - WiFi P2P Action Frame
172 *
173 * @category: P2P_AF_CATEGORY
174 * @OUI[3]: OUI - P2P_OUI
175 * @type: OUI Type - P2P_VER
176 * @subtype: OUI Subtype - P2P_AF_*
177 * @dialog_token: nonzero, identifies req/resp tranaction
178 * @elts[1]: Variable length information elements.
179 */
180struct brcmf_p2p_action_frame {
181        u8      category;
182        u8      oui[3];
183        u8      type;
184        u8      subtype;
185        u8      dialog_token;
186        u8      elts[1];
187};
188
189/**
190 * struct brcmf_p2psd_gas_pub_act_frame - Wi-Fi GAS Public Action Frame
191 *
192 * @category: 0x04 Public Action Frame
193 * @action: 0x6c Advertisement Protocol
194 * @dialog_token: nonzero, identifies req/rsp transaction
195 * @query_data[1]: Query Data. SD gas ireq SD gas iresp
196 */
197struct brcmf_p2psd_gas_pub_act_frame {
198        u8      category;
199        u8      action;
200        u8      dialog_token;
201        u8      query_data[1];
202};
203
204/**
205 * struct brcmf_config_af_params - Action Frame Parameters for tx.
206 *
207 * @mpc_onoff: To make sure to send successfully action frame, we have to
208 *             turn off mpc  0: off, 1: on,  (-1): do nothing
209 * @search_channel: 1: search peer's channel to send af
210 * extra_listen: keep the dwell time to get af response frame.
211 */
212struct brcmf_config_af_params {
213        s32 mpc_onoff;
214        bool search_channel;
215        bool extra_listen;
216};
217
218/**
219 * brcmf_p2p_is_pub_action() - true if p2p public type frame.
220 *
221 * @frame: action frame data.
222 * @frame_len: length of action frame data.
223 *
224 * Determine if action frame is p2p public action type
225 */
226static bool brcmf_p2p_is_pub_action(void *frame, u32 frame_len)
227{
228        struct brcmf_p2p_pub_act_frame *pact_frm;
229
230        if (frame == NULL)
231                return false;
232
233        pact_frm = (struct brcmf_p2p_pub_act_frame *)frame;
234        if (frame_len < sizeof(struct brcmf_p2p_pub_act_frame) - 1)
235                return false;
236
237        if (pact_frm->category == P2P_PUB_AF_CATEGORY &&
238            pact_frm->action == P2P_PUB_AF_ACTION &&
239            pact_frm->oui_type == P2P_VER &&
240            memcmp(pact_frm->oui, P2P_OUI, P2P_OUI_LEN) == 0)
241                return true;
242
243        return false;
244}
245
246/**
247 * brcmf_p2p_is_p2p_action() - true if p2p action type frame.
248 *
249 * @frame: action frame data.
250 * @frame_len: length of action frame data.
251 *
252 * Determine if action frame is p2p action type
253 */
254static bool brcmf_p2p_is_p2p_action(void *frame, u32 frame_len)
255{
256        struct brcmf_p2p_action_frame *act_frm;
257
258        if (frame == NULL)
259                return false;
260
261        act_frm = (struct brcmf_p2p_action_frame *)frame;
262        if (frame_len < sizeof(struct brcmf_p2p_action_frame) - 1)
263                return false;
264
265        if (act_frm->category == P2P_AF_CATEGORY &&
266            act_frm->type  == P2P_VER &&
267            memcmp(act_frm->oui, P2P_OUI, P2P_OUI_LEN) == 0)
268                return true;
269
270        return false;
271}
272
273/**
274 * brcmf_p2p_is_gas_action() - true if p2p gas action type frame.
275 *
276 * @frame: action frame data.
277 * @frame_len: length of action frame data.
278 *
279 * Determine if action frame is p2p gas action type
280 */
281static bool brcmf_p2p_is_gas_action(void *frame, u32 frame_len)
282{
283        struct brcmf_p2psd_gas_pub_act_frame *sd_act_frm;
284
285        if (frame == NULL)
286                return false;
287
288        sd_act_frm = (struct brcmf_p2psd_gas_pub_act_frame *)frame;
289        if (frame_len < sizeof(struct brcmf_p2psd_gas_pub_act_frame) - 1)
290                return false;
291
292        if (sd_act_frm->category != P2PSD_ACTION_CATEGORY)
293                return false;
294
295        if (sd_act_frm->action == P2PSD_ACTION_ID_GAS_IREQ ||
296            sd_act_frm->action == P2PSD_ACTION_ID_GAS_IRESP ||
297            sd_act_frm->action == P2PSD_ACTION_ID_GAS_CREQ ||
298            sd_act_frm->action == P2PSD_ACTION_ID_GAS_CRESP)
299                return true;
300
301        return false;
302}
303
304/**
305 * brcmf_p2p_print_actframe() - debug print routine.
306 *
307 * @tx: Received or to be transmitted
308 * @frame: action frame data.
309 * @frame_len: length of action frame data.
310 *
311 * Print information about the p2p action frame
312 */
313
314#ifdef DEBUG
315
316static void brcmf_p2p_print_actframe(bool tx, void *frame, u32 frame_len)
317{
318        struct brcmf_p2p_pub_act_frame *pact_frm;
319        struct brcmf_p2p_action_frame *act_frm;
320        struct brcmf_p2psd_gas_pub_act_frame *sd_act_frm;
321
322        if (!frame || frame_len <= 2)
323                return;
324
325        if (brcmf_p2p_is_pub_action(frame, frame_len)) {
326                pact_frm = (struct brcmf_p2p_pub_act_frame *)frame;
327                switch (pact_frm->subtype) {
328                case P2P_PAF_GON_REQ:
329                        brcmf_dbg(TRACE, "%s P2P Group Owner Negotiation Req Frame\n",
330                                  (tx) ? "TX" : "RX");
331                        break;
332                case P2P_PAF_GON_RSP:
333                        brcmf_dbg(TRACE, "%s P2P Group Owner Negotiation Rsp Frame\n",
334                                  (tx) ? "TX" : "RX");
335                        break;
336                case P2P_PAF_GON_CONF:
337                        brcmf_dbg(TRACE, "%s P2P Group Owner Negotiation Confirm Frame\n",
338                                  (tx) ? "TX" : "RX");
339                        break;
340                case P2P_PAF_INVITE_REQ:
341                        brcmf_dbg(TRACE, "%s P2P Invitation Request  Frame\n",
342                                  (tx) ? "TX" : "RX");
343                        break;
344                case P2P_PAF_INVITE_RSP:
345                        brcmf_dbg(TRACE, "%s P2P Invitation Response Frame\n",
346                                  (tx) ? "TX" : "RX");
347                        break;
348                case P2P_PAF_DEVDIS_REQ:
349                        brcmf_dbg(TRACE, "%s P2P Device Discoverability Request Frame\n",
350                                  (tx) ? "TX" : "RX");
351                        break;
352                case P2P_PAF_DEVDIS_RSP:
353                        brcmf_dbg(TRACE, "%s P2P Device Discoverability Response Frame\n",
354                                  (tx) ? "TX" : "RX");
355                        break;
356                case P2P_PAF_PROVDIS_REQ:
357                        brcmf_dbg(TRACE, "%s P2P Provision Discovery Request Frame\n",
358                                  (tx) ? "TX" : "RX");
359                        break;
360                case P2P_PAF_PROVDIS_RSP:
361                        brcmf_dbg(TRACE, "%s P2P Provision Discovery Response Frame\n",
362                                  (tx) ? "TX" : "RX");
363                        break;
364                default:
365                        brcmf_dbg(TRACE, "%s Unknown P2P Public Action Frame\n",
366                                  (tx) ? "TX" : "RX");
367                        break;
368                }
369        } else if (brcmf_p2p_is_p2p_action(frame, frame_len)) {
370                act_frm = (struct brcmf_p2p_action_frame *)frame;
371                switch (act_frm->subtype) {
372                case P2P_AF_NOTICE_OF_ABSENCE:
373                        brcmf_dbg(TRACE, "%s P2P Notice of Absence Frame\n",
374                                  (tx) ? "TX" : "RX");
375                        break;
376                case P2P_AF_PRESENCE_REQ:
377                        brcmf_dbg(TRACE, "%s P2P Presence Request Frame\n",
378                                  (tx) ? "TX" : "RX");
379                        break;
380                case P2P_AF_PRESENCE_RSP:
381                        brcmf_dbg(TRACE, "%s P2P Presence Response Frame\n",
382                                  (tx) ? "TX" : "RX");
383                        break;
384                case P2P_AF_GO_DISC_REQ:
385                        brcmf_dbg(TRACE, "%s P2P Discoverability Request Frame\n",
386                                  (tx) ? "TX" : "RX");
387                        break;
388                default:
389                        brcmf_dbg(TRACE, "%s Unknown P2P Action Frame\n",
390                                  (tx) ? "TX" : "RX");
391                }
392
393        } else if (brcmf_p2p_is_gas_action(frame, frame_len)) {
394                sd_act_frm = (struct brcmf_p2psd_gas_pub_act_frame *)frame;
395                switch (sd_act_frm->action) {
396                case P2PSD_ACTION_ID_GAS_IREQ:
397                        brcmf_dbg(TRACE, "%s P2P GAS Initial Request\n",
398                                  (tx) ? "TX" : "RX");
399                        break;
400                case P2PSD_ACTION_ID_GAS_IRESP:
401                        brcmf_dbg(TRACE, "%s P2P GAS Initial Response\n",
402                                  (tx) ? "TX" : "RX");
403                        break;
404                case P2PSD_ACTION_ID_GAS_CREQ:
405                        brcmf_dbg(TRACE, "%s P2P GAS Comback Request\n",
406                                  (tx) ? "TX" : "RX");
407                        break;
408                case P2PSD_ACTION_ID_GAS_CRESP:
409                        brcmf_dbg(TRACE, "%s P2P GAS Comback Response\n",
410                                  (tx) ? "TX" : "RX");
411                        break;
412                default:
413                        brcmf_dbg(TRACE, "%s Unknown P2P GAS Frame\n",
414                                  (tx) ? "TX" : "RX");
415                        break;
416                }
417        }
418}
419
420#else
421
422static void brcmf_p2p_print_actframe(bool tx, void *frame, u32 frame_len)
423{
424}
425
426#endif
427
428
429/**
430 * brcmf_p2p_set_firmware() - prepare firmware for peer-to-peer operation.
431 *
432 * @ifp: ifp to use for iovars (primary).
433 * @p2p_mac: mac address to configure for p2p_da_override
434 */
435static int brcmf_p2p_set_firmware(struct brcmf_if *ifp, u8 *p2p_mac)
436{
437        s32 ret = 0;
438
439        brcmf_fil_cmd_int_set(ifp, BRCMF_C_DOWN, 1);
440        brcmf_fil_iovar_int_set(ifp, "apsta", 1);
441        brcmf_fil_cmd_int_set(ifp, BRCMF_C_UP, 1);
442
443        /* In case of COB type, firmware has default mac address
444         * After Initializing firmware, we have to set current mac address to
445         * firmware for P2P device address. This must be done with discovery
446         * disabled.
447         */
448        brcmf_fil_iovar_int_set(ifp, "p2p_disc", 0);
449
450        ret = brcmf_fil_iovar_data_set(ifp, "p2p_da_override", p2p_mac,
451                                       ETH_ALEN);
452        if (ret)
453                brcmf_err("failed to update device address ret %d\n", ret);
454
455        return ret;
456}
457
458/**
459 * brcmf_p2p_generate_bss_mac() - derive mac addresses for P2P.
460 *
461 * @p2p: P2P specific data.
462 * @dev_addr: optional device address.
463 *
464 * P2P needs mac addresses for P2P device and interface. If no device
465 * address it specified, these are derived from the primary net device, ie.
466 * the permanent ethernet address of the device.
467 */
468static void brcmf_p2p_generate_bss_mac(struct brcmf_p2p_info *p2p, u8 *dev_addr)
469{
470        struct brcmf_if *pri_ifp = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->ifp;
471        bool local_admin = false;
472
473        if (!dev_addr || is_zero_ether_addr(dev_addr)) {
474                dev_addr = pri_ifp->mac_addr;
475                local_admin = true;
476        }
477
478        /* Generate the P2P Device Address.  This consists of the device's
479         * primary MAC address with the locally administered bit set.
480         */
481        memcpy(p2p->dev_addr, dev_addr, ETH_ALEN);
482        if (local_admin)
483                p2p->dev_addr[0] |= 0x02;
484
485        /* Generate the P2P Interface Address.  If the discovery and connection
486         * BSSCFGs need to simultaneously co-exist, then this address must be
487         * different from the P2P Device Address, but also locally administered.
488         */
489        memcpy(p2p->int_addr, p2p->dev_addr, ETH_ALEN);
490        p2p->int_addr[0] |= 0x02;
491        p2p->int_addr[4] ^= 0x80;
492}
493
494/**
495 * brcmf_p2p_scan_is_p2p_request() - is cfg80211 scan request a P2P scan.
496 *
497 * @request: the scan request as received from cfg80211.
498 *
499 * returns true if one of the ssids in the request matches the
500 * P2P wildcard ssid; otherwise returns false.
501 */
502static bool brcmf_p2p_scan_is_p2p_request(struct cfg80211_scan_request *request)
503{
504        struct cfg80211_ssid *ssids = request->ssids;
505        int i;
506
507        for (i = 0; i < request->n_ssids; i++) {
508                if (ssids[i].ssid_len != BRCMF_P2P_WILDCARD_SSID_LEN)
509                        continue;
510
511                brcmf_dbg(INFO, "comparing ssid \"%s\"", ssids[i].ssid);
512                if (!memcmp(BRCMF_P2P_WILDCARD_SSID, ssids[i].ssid,
513                            BRCMF_P2P_WILDCARD_SSID_LEN))
514                        return true;
515        }
516        return false;
517}
518
519/**
520 * brcmf_p2p_set_discover_state - set discover state in firmware.
521 *
522 * @ifp: low-level interface object.
523 * @state: discover state to set.
524 * @chanspec: channel parameters (for state @WL_P2P_DISC_ST_LISTEN only).
525 * @listen_ms: duration to listen (for state @WL_P2P_DISC_ST_LISTEN only).
526 */
527static s32 brcmf_p2p_set_discover_state(struct brcmf_if *ifp, u8 state,
528                                        u16 chanspec, u16 listen_ms)
529{
530        struct brcmf_p2p_disc_st_le discover_state;
531        s32 ret = 0;
532        brcmf_dbg(TRACE, "enter\n");
533
534        discover_state.state = state;
535        discover_state.chspec = cpu_to_le16(chanspec);
536        discover_state.dwell = cpu_to_le16(listen_ms);
537        ret = brcmf_fil_bsscfg_data_set(ifp, "p2p_state", &discover_state,
538                                        sizeof(discover_state));
539        return ret;
540}
541
542/**
543 * brcmf_p2p_deinit_discovery() - disable P2P device discovery.
544 *
545 * @p2p: P2P specific data.
546 *
547 * Resets the discovery state and disables it in firmware.
548 */
549static s32 brcmf_p2p_deinit_discovery(struct brcmf_p2p_info *p2p)
550{
551        struct brcmf_cfg80211_vif *vif;
552
553        brcmf_dbg(TRACE, "enter\n");
554
555        /* Set the discovery state to SCAN */
556        vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif;
557        (void)brcmf_p2p_set_discover_state(vif->ifp, WL_P2P_DISC_ST_SCAN, 0, 0);
558
559        /* Disable P2P discovery in the firmware */
560        vif = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif;
561        (void)brcmf_fil_iovar_int_set(vif->ifp, "p2p_disc", 0);
562
563        return 0;
564}
565
566/**
567 * brcmf_p2p_enable_discovery() - initialize and configure discovery.
568 *
569 * @p2p: P2P specific data.
570 *
571 * Initializes the discovery device and configure the virtual interface.
572 */
573static int brcmf_p2p_enable_discovery(struct brcmf_p2p_info *p2p)
574{
575        struct brcmf_cfg80211_vif *vif;
576        s32 ret = 0;
577
578        brcmf_dbg(TRACE, "enter\n");
579        vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif;
580        if (!vif) {
581                brcmf_err("P2P config device not available\n");
582                ret = -EPERM;
583                goto exit;
584        }
585
586        if (test_bit(BRCMF_P2P_STATUS_ENABLED, &p2p->status)) {
587                brcmf_dbg(INFO, "P2P config device already configured\n");
588                goto exit;
589        }
590
591        /* Re-initialize P2P Discovery in the firmware */
592        vif = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif;
593        ret = brcmf_fil_iovar_int_set(vif->ifp, "p2p_disc", 1);
594        if (ret < 0) {
595                brcmf_err("set p2p_disc error\n");
596                goto exit;
597        }
598        vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif;
599        ret = brcmf_p2p_set_discover_state(vif->ifp, WL_P2P_DISC_ST_SCAN, 0, 0);
600        if (ret < 0) {
601                brcmf_err("unable to set WL_P2P_DISC_ST_SCAN\n");
602                goto exit;
603        }
604
605        /*
606         * Set wsec to any non-zero value in the discovery bsscfg
607         * to ensure our P2P probe responses have the privacy bit
608         * set in the 802.11 WPA IE. Some peer devices may not
609         * initiate WPS with us if this bit is not set.
610         */
611        ret = brcmf_fil_bsscfg_int_set(vif->ifp, "wsec", AES_ENABLED);
612        if (ret < 0) {
613                brcmf_err("wsec error %d\n", ret);
614                goto exit;
615        }
616
617        set_bit(BRCMF_P2P_STATUS_ENABLED, &p2p->status);
618exit:
619        return ret;
620}
621
622/**
623 * brcmf_p2p_escan() - initiate a P2P scan.
624 *
625 * @p2p: P2P specific data.
626 * @num_chans: number of channels to scan.
627 * @chanspecs: channel parameters for @num_chans channels.
628 * @search_state: P2P discover state to use.
629 * @bss_type: type of P2P bss.
630 */
631static s32 brcmf_p2p_escan(struct brcmf_p2p_info *p2p, u32 num_chans,
632                           u16 chanspecs[], s32 search_state,
633                           enum p2p_bss_type bss_type)
634{
635        s32 ret = 0;
636        s32 memsize = offsetof(struct brcmf_p2p_scan_le,
637                               eparams.params_le.channel_list);
638        s32 nprobes;
639        s32 active;
640        u32 i;
641        u8 *memblk;
642        struct brcmf_cfg80211_vif *vif;
643        struct brcmf_p2p_scan_le *p2p_params;
644        struct brcmf_scan_params_le *sparams;
645
646        memsize += num_chans * sizeof(__le16);
647        memblk = kzalloc(memsize, GFP_KERNEL);
648        if (!memblk)
649                return -ENOMEM;
650
651        vif = p2p->bss_idx[bss_type].vif;
652        if (vif == NULL) {
653                brcmf_err("no vif for bss type %d\n", bss_type);
654                ret = -EINVAL;
655                goto exit;
656        }
657        p2p_params = (struct brcmf_p2p_scan_le *)memblk;
658        sparams = &p2p_params->eparams.params_le;
659
660        switch (search_state) {
661        case WL_P2P_DISC_ST_SEARCH:
662                /*
663                 * If we in SEARCH STATE, we don't need to set SSID explictly
664                 * because dongle use P2P WILDCARD internally by default, use
665                 * null ssid, which it is already due to kzalloc.
666                 */
667                break;
668        case WL_P2P_DISC_ST_SCAN:
669                /*
670                 * wpa_supplicant has p2p_find command with type social or
671                 * progressive. For progressive, we need to set the ssid to
672                 * P2P WILDCARD because we just do broadcast scan unless
673                 * setting SSID.
674                 */
675                sparams->ssid_le.SSID_len =
676                                cpu_to_le32(BRCMF_P2P_WILDCARD_SSID_LEN);
677                memcpy(sparams->ssid_le.SSID, BRCMF_P2P_WILDCARD_SSID,
678                       BRCMF_P2P_WILDCARD_SSID_LEN);
679                break;
680        default:
681                brcmf_err(" invalid search state %d\n", search_state);
682                ret = -EINVAL;
683                goto exit;
684        }
685
686        brcmf_p2p_set_discover_state(vif->ifp, search_state, 0, 0);
687
688        /*
689         * set p2p scan parameters.
690         */
691        p2p_params->type = 'E';
692
693        /* determine the scan engine parameters */
694        sparams->bss_type = DOT11_BSSTYPE_ANY;
695        if (p2p->cfg->active_scan)
696                sparams->scan_type = 0;
697        else
698                sparams->scan_type = 1;
699
700        eth_broadcast_addr(sparams->bssid);
701        sparams->home_time = cpu_to_le32(P2PAPI_SCAN_HOME_TIME_MS);
702
703        /*
704         * SOCIAL_CHAN_CNT + 1 takes care of the Progressive scan
705         * supported by the supplicant.
706         */
707        if (num_chans == SOCIAL_CHAN_CNT || num_chans == (SOCIAL_CHAN_CNT + 1))
708                active = P2PAPI_SCAN_SOCIAL_DWELL_TIME_MS;
709        else if (num_chans == AF_PEER_SEARCH_CNT)
710                active = P2PAPI_SCAN_AF_SEARCH_DWELL_TIME_MS;
711        else if (brcmf_get_vif_state_any(p2p->cfg, BRCMF_VIF_STATUS_CONNECTED))
712                active = -1;
713        else
714                active = P2PAPI_SCAN_DWELL_TIME_MS;
715
716        /* Override scan params to find a peer for a connection */
717        if (num_chans == 1) {
718                active = WL_SCAN_CONNECT_DWELL_TIME_MS;
719                /* WAR to sync with presence period of VSDB GO.
720                 * send probe request more frequently
721                 */
722                nprobes = active / WL_SCAN_JOIN_PROBE_INTERVAL_MS;
723        } else {
724                nprobes = active / P2PAPI_SCAN_NPROBS_TIME_MS;
725        }
726
727        if (nprobes <= 0)
728                nprobes = 1;
729
730        brcmf_dbg(INFO, "nprobes # %d, active_time %d\n", nprobes, active);
731        sparams->active_time = cpu_to_le32(active);
732        sparams->nprobes = cpu_to_le32(nprobes);
733        sparams->passive_time = cpu_to_le32(-1);
734        sparams->channel_num = cpu_to_le32(num_chans &
735                                           BRCMF_SCAN_PARAMS_COUNT_MASK);
736        for (i = 0; i < num_chans; i++)
737                sparams->channel_list[i] = cpu_to_le16(chanspecs[i]);
738
739        /* set the escan specific parameters */
740        p2p_params->eparams.version = cpu_to_le32(BRCMF_ESCAN_REQ_VERSION);
741        p2p_params->eparams.action =  cpu_to_le16(WL_ESCAN_ACTION_START);
742        p2p_params->eparams.sync_id = cpu_to_le16(0x1234);
743        /* perform p2p scan on primary device */
744        ret = brcmf_fil_bsscfg_data_set(vif->ifp, "p2p_scan", memblk, memsize);
745        if (!ret)
746                set_bit(BRCMF_SCAN_STATUS_BUSY, &p2p->cfg->scan_status);
747exit:
748        kfree(memblk);
749        return ret;
750}
751
752/**
753 * brcmf_p2p_run_escan() - escan callback for peer-to-peer.
754 *
755 * @cfg: driver private data for cfg80211 interface.
756 * @ndev: net device for which scan is requested.
757 * @request: scan request from cfg80211.
758 * @action: scan action.
759 *
760 * Determines the P2P discovery state based to scan request parameters and
761 * validates the channels in the request.
762 */
763static s32 brcmf_p2p_run_escan(struct brcmf_cfg80211_info *cfg,
764                               struct brcmf_if *ifp,
765                               struct cfg80211_scan_request *request)
766{
767        struct brcmf_p2p_info *p2p = &cfg->p2p;
768        s32 err = 0;
769        s32 search_state = WL_P2P_DISC_ST_SCAN;
770        struct brcmf_cfg80211_vif *vif;
771        struct net_device *dev = NULL;
772        int i, num_nodfs = 0;
773        u16 *chanspecs;
774
775        brcmf_dbg(TRACE, "enter\n");
776
777        if (!request) {
778                err = -EINVAL;
779                goto exit;
780        }
781
782        if (request->n_channels) {
783                chanspecs = kcalloc(request->n_channels, sizeof(*chanspecs),
784                                    GFP_KERNEL);
785                if (!chanspecs) {
786                        err = -ENOMEM;
787                        goto exit;
788                }
789                vif = p2p->bss_idx[P2PAPI_BSSCFG_CONNECTION].vif;
790                if (vif)
791                        dev = vif->wdev.netdev;
792                if (request->n_channels == 3 &&
793                    request->channels[0]->hw_value == SOCIAL_CHAN_1 &&
794                    request->channels[1]->hw_value == SOCIAL_CHAN_2 &&
795                    request->channels[2]->hw_value == SOCIAL_CHAN_3) {
796                        /* SOCIAL CHANNELS 1, 6, 11 */
797                        search_state = WL_P2P_DISC_ST_SEARCH;
798                        brcmf_dbg(INFO, "P2P SEARCH PHASE START\n");
799                } else if (dev != NULL &&
800                           vif->wdev.iftype == NL80211_IFTYPE_P2P_GO) {
801                        /* If you are already a GO, then do SEARCH only */
802                        brcmf_dbg(INFO, "Already a GO. Do SEARCH Only\n");
803                        search_state = WL_P2P_DISC_ST_SEARCH;
804                } else {
805                        brcmf_dbg(INFO, "P2P SCAN STATE START\n");
806                }
807
808                /*
809                 * no P2P scanning on passive or DFS channels.
810                 */
811                for (i = 0; i < request->n_channels; i++) {
812                        struct ieee80211_channel *chan = request->channels[i];
813
814                        if (chan->flags & (IEEE80211_CHAN_RADAR |
815                                           IEEE80211_CHAN_NO_IR))
816                                continue;
817
818                        chanspecs[i] = channel_to_chanspec(&p2p->cfg->d11inf,
819                                                           chan);
820                        brcmf_dbg(INFO, "%d: chan=%d, channel spec=%x\n",
821                                  num_nodfs, chan->hw_value, chanspecs[i]);
822                        num_nodfs++;
823                }
824                err = brcmf_p2p_escan(p2p, num_nodfs, chanspecs, search_state,
825                                      P2PAPI_BSSCFG_DEVICE);
826                kfree(chanspecs);
827        }
828exit:
829        if (err)
830                brcmf_err("error (%d)\n", err);
831        return err;
832}
833
834
835/**
836 * brcmf_p2p_find_listen_channel() - find listen channel in ie string.
837 *
838 * @ie: string of information elements.
839 * @ie_len: length of string.
840 *
841 * Scan ie for p2p ie and look for attribute 6 channel. If available determine
842 * channel and return it.
843 */
844static s32 brcmf_p2p_find_listen_channel(const u8 *ie, u32 ie_len)
845{
846        u8 channel_ie[5];
847        s32 listen_channel;
848        s32 err;
849
850        err = cfg80211_get_p2p_attr(ie, ie_len,
851                                    IEEE80211_P2P_ATTR_LISTEN_CHANNEL,
852                                    channel_ie, sizeof(channel_ie));
853        if (err < 0)
854                return err;
855
856        /* listen channel subel length format:     */
857        /* 3(country) + 1(op. class) + 1(chan num) */
858        listen_channel = (s32)channel_ie[3 + 1];
859
860        if (listen_channel == SOCIAL_CHAN_1 ||
861            listen_channel == SOCIAL_CHAN_2 ||
862            listen_channel == SOCIAL_CHAN_3) {
863                brcmf_dbg(INFO, "Found my Listen Channel %d\n", listen_channel);
864                return listen_channel;
865        }
866
867        return -EPERM;
868}
869
870
871/**
872 * brcmf_p2p_scan_prep() - prepare scan based on request.
873 *
874 * @wiphy: wiphy device.
875 * @request: scan request from cfg80211.
876 * @vif: vif on which scan request is to be executed.
877 *
878 * Prepare the scan appropriately for type of scan requested. Overrides the
879 * escan .run() callback for peer-to-peer scanning.
880 */
881int brcmf_p2p_scan_prep(struct wiphy *wiphy,
882                        struct cfg80211_scan_request *request,
883                        struct brcmf_cfg80211_vif *vif)
884{
885        struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
886        struct brcmf_p2p_info *p2p = &cfg->p2p;
887        int err = 0;
888
889        if (brcmf_p2p_scan_is_p2p_request(request)) {
890                /* find my listen channel */
891                err = brcmf_p2p_find_listen_channel(request->ie,
892                                                    request->ie_len);
893                if (err < 0)
894                        return err;
895
896                p2p->afx_hdl.my_listen_chan = err;
897
898                clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status);
899                brcmf_dbg(INFO, "P2P: GO_NEG_PHASE status cleared\n");
900
901                err = brcmf_p2p_enable_discovery(p2p);
902                if (err)
903                        return err;
904
905                vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif;
906
907                /* override .run_escan() callback. */
908                cfg->escan_info.run = brcmf_p2p_run_escan;
909        }
910        err = brcmf_vif_set_mgmt_ie(vif, BRCMF_VNDR_IE_PRBREQ_FLAG,
911                                    request->ie, request->ie_len);
912        return err;
913}
914
915
916/**
917 * brcmf_p2p_discover_listen() - set firmware to discover listen state.
918 *
919 * @p2p: p2p device.
920 * @channel: channel nr for discover listen.
921 * @duration: time in ms to stay on channel.
922 *
923 */
924static s32
925brcmf_p2p_discover_listen(struct brcmf_p2p_info *p2p, u16 channel, u32 duration)
926{
927        struct brcmf_cfg80211_vif *vif;
928        struct brcmu_chan ch;
929        s32 err = 0;
930
931        vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif;
932        if (!vif) {
933                brcmf_err("Discovery is not set, so we have nothing to do\n");
934                err = -EPERM;
935                goto exit;
936        }
937
938        if (test_bit(BRCMF_P2P_STATUS_DISCOVER_LISTEN, &p2p->status)) {
939                brcmf_err("Previous LISTEN is not completed yet\n");
940                /* WAR: prevent cookie mismatch in wpa_supplicant return OK */
941                goto exit;
942        }
943
944        ch.chnum = channel;
945        ch.bw = BRCMU_CHAN_BW_20;
946        p2p->cfg->d11inf.encchspec(&ch);
947        err = brcmf_p2p_set_discover_state(vif->ifp, WL_P2P_DISC_ST_LISTEN,
948                                           ch.chspec, (u16)duration);
949        if (!err) {
950                set_bit(BRCMF_P2P_STATUS_DISCOVER_LISTEN, &p2p->status);
951                p2p->remain_on_channel_cookie++;
952        }
953exit:
954        return err;
955}
956
957
958/**
959 * brcmf_p2p_remain_on_channel() - put device on channel and stay there.
960 *
961 * @wiphy: wiphy device.
962 * @channel: channel to stay on.
963 * @duration: time in ms to remain on channel.
964 *
965 */
966int brcmf_p2p_remain_on_channel(struct wiphy *wiphy, struct wireless_dev *wdev,
967                                struct ieee80211_channel *channel,
968                                unsigned int duration, u64 *cookie)
969{
970        struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
971        struct brcmf_p2p_info *p2p = &cfg->p2p;
972        s32 err;
973        u16 channel_nr;
974
975        channel_nr = ieee80211_frequency_to_channel(channel->center_freq);
976        brcmf_dbg(TRACE, "Enter, channel: %d, duration ms (%d)\n", channel_nr,
977                  duration);
978
979        err = brcmf_p2p_enable_discovery(p2p);
980        if (err)
981                goto exit;
982        err = brcmf_p2p_discover_listen(p2p, channel_nr, duration);
983        if (err)
984                goto exit;
985
986        memcpy(&p2p->remain_on_channel, channel, sizeof(*channel));
987        *cookie = p2p->remain_on_channel_cookie;
988        cfg80211_ready_on_channel(wdev, *cookie, channel, duration, GFP_KERNEL);
989
990exit:
991        return err;
992}
993
994
995/**
996 * brcmf_p2p_notify_listen_complete() - p2p listen has completed.
997 *
998 * @ifp: interfac control.
999 * @e: event message. Not used, to make it usable for fweh event dispatcher.
1000 * @data: payload of message. Not used.
1001 *
1002 */
1003int brcmf_p2p_notify_listen_complete(struct brcmf_if *ifp,
1004                                     const struct brcmf_event_msg *e,
1005                                     void *data)
1006{
1007        struct brcmf_cfg80211_info *cfg = ifp->drvr->config;
1008        struct brcmf_p2p_info *p2p = &cfg->p2p;
1009
1010        brcmf_dbg(TRACE, "Enter\n");
1011        if (test_and_clear_bit(BRCMF_P2P_STATUS_DISCOVER_LISTEN,
1012                               &p2p->status)) {
1013                if (test_and_clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_AF_LISTEN,
1014                                       &p2p->status)) {
1015                        clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME,
1016                                  &p2p->status);
1017                        brcmf_dbg(INFO, "Listen DONE, wake up wait_next_af\n");
1018                        complete(&p2p->wait_next_af);
1019                }
1020
1021                cfg80211_remain_on_channel_expired(&ifp->vif->wdev,
1022                                                   p2p->remain_on_channel_cookie,
1023                                                   &p2p->remain_on_channel,
1024                                                   GFP_KERNEL);
1025        }
1026        return 0;
1027}
1028
1029
1030/**
1031 * brcmf_p2p_cancel_remain_on_channel() - cancel p2p listen state.
1032 *
1033 * @ifp: interfac control.
1034 *
1035 */
1036void brcmf_p2p_cancel_remain_on_channel(struct brcmf_if *ifp)
1037{
1038        if (!ifp)
1039                return;
1040        brcmf_p2p_set_discover_state(ifp, WL_P2P_DISC_ST_SCAN, 0, 0);
1041        brcmf_p2p_notify_listen_complete(ifp, NULL, NULL);
1042}
1043
1044
1045/**
1046 * brcmf_p2p_act_frm_search() - search function for action frame.
1047 *
1048 * @p2p: p2p device.
1049 * channel: channel on which action frame is to be trasmitted.
1050 *
1051 * search function to reach at common channel to send action frame. When
1052 * channel is 0 then all social channels will be used to send af
1053 */
1054static s32 brcmf_p2p_act_frm_search(struct brcmf_p2p_info *p2p, u16 channel)
1055{
1056        s32 err;
1057        u32 channel_cnt;
1058        u16 *default_chan_list;
1059        u32 i;
1060        struct brcmu_chan ch;
1061
1062        brcmf_dbg(TRACE, "Enter\n");
1063
1064        if (channel)
1065                channel_cnt = AF_PEER_SEARCH_CNT;
1066        else
1067                channel_cnt = SOCIAL_CHAN_CNT;
1068        default_chan_list = kzalloc(channel_cnt * sizeof(*default_chan_list),
1069                                    GFP_KERNEL);
1070        if (default_chan_list == NULL) {
1071                brcmf_err("channel list allocation failed\n");
1072                err = -ENOMEM;
1073                goto exit;
1074        }
1075        ch.bw = BRCMU_CHAN_BW_20;
1076        if (channel) {
1077                ch.chnum = channel;
1078                p2p->cfg->d11inf.encchspec(&ch);
1079                /* insert same channel to the chan_list */
1080                for (i = 0; i < channel_cnt; i++)
1081                        default_chan_list[i] = ch.chspec;
1082        } else {
1083                ch.chnum = SOCIAL_CHAN_1;
1084                p2p->cfg->d11inf.encchspec(&ch);
1085                default_chan_list[0] = ch.chspec;
1086                ch.chnum = SOCIAL_CHAN_2;
1087                p2p->cfg->d11inf.encchspec(&ch);
1088                default_chan_list[1] = ch.chspec;
1089                ch.chnum = SOCIAL_CHAN_3;
1090                p2p->cfg->d11inf.encchspec(&ch);
1091                default_chan_list[2] = ch.chspec;
1092        }
1093        err = brcmf_p2p_escan(p2p, channel_cnt, default_chan_list,
1094                              WL_P2P_DISC_ST_SEARCH, P2PAPI_BSSCFG_DEVICE);
1095        kfree(default_chan_list);
1096exit:
1097        return err;
1098}
1099
1100
1101/**
1102 * brcmf_p2p_afx_handler() - afx worker thread.
1103 *
1104 * @work:
1105 *
1106 */
1107static void brcmf_p2p_afx_handler(struct work_struct *work)
1108{
1109        struct afx_hdl *afx_hdl = container_of(work, struct afx_hdl, afx_work);
1110        struct brcmf_p2p_info *p2p = container_of(afx_hdl,
1111                                                  struct brcmf_p2p_info,
1112                                                  afx_hdl);
1113        s32 err;
1114
1115        if (!afx_hdl->is_active)
1116                return;
1117
1118        if (afx_hdl->is_listen && afx_hdl->my_listen_chan)
1119                /* 100ms ~ 300ms */
1120                err = brcmf_p2p_discover_listen(p2p, afx_hdl->my_listen_chan,
1121                                                100 * (1 + prandom_u32() % 3));
1122        else
1123                err = brcmf_p2p_act_frm_search(p2p, afx_hdl->peer_listen_chan);
1124
1125        if (err) {
1126                brcmf_err("ERROR occurred! value is (%d)\n", err);
1127                if (test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL,
1128                             &p2p->status))
1129                        complete(&afx_hdl->act_frm_scan);
1130        }
1131}
1132
1133
1134/**
1135 * brcmf_p2p_af_searching_channel() - search channel.
1136 *
1137 * @p2p: p2p device info struct.
1138 *
1139 */
1140static s32 brcmf_p2p_af_searching_channel(struct brcmf_p2p_info *p2p)
1141{
1142        struct afx_hdl *afx_hdl = &p2p->afx_hdl;
1143        struct brcmf_cfg80211_vif *pri_vif;
1144        unsigned long duration;
1145        s32 retry;
1146
1147        brcmf_dbg(TRACE, "Enter\n");
1148
1149        pri_vif = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif;
1150
1151        reinit_completion(&afx_hdl->act_frm_scan);
1152        set_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status);
1153        afx_hdl->is_active = true;
1154        afx_hdl->peer_chan = P2P_INVALID_CHANNEL;
1155
1156        /* Loop to wait until we find a peer's channel or the
1157         * pending action frame tx is cancelled.
1158         */
1159        retry = 0;
1160        duration = msecs_to_jiffies(P2P_AF_FRM_SCAN_MAX_WAIT);
1161        while ((retry < P2P_CHANNEL_SYNC_RETRY) &&
1162               (afx_hdl->peer_chan == P2P_INVALID_CHANNEL)) {
1163                afx_hdl->is_listen = false;
1164                brcmf_dbg(TRACE, "Scheduling action frame for sending.. (%d)\n",
1165                          retry);
1166                /* search peer on peer's listen channel */
1167                schedule_work(&afx_hdl->afx_work);
1168                wait_for_completion_timeout(&afx_hdl->act_frm_scan, duration);
1169                if ((afx_hdl->peer_chan != P2P_INVALID_CHANNEL) ||
1170                    (!test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL,
1171                               &p2p->status)))
1172                        break;
1173
1174                if (afx_hdl->my_listen_chan) {
1175                        brcmf_dbg(TRACE, "Scheduling listen peer, channel=%d\n",
1176                                  afx_hdl->my_listen_chan);
1177                        /* listen on my listen channel */
1178                        afx_hdl->is_listen = true;
1179                        schedule_work(&afx_hdl->afx_work);
1180                        wait_for_completion_timeout(&afx_hdl->act_frm_scan,
1181                                                    duration);
1182                }
1183                if ((afx_hdl->peer_chan != P2P_INVALID_CHANNEL) ||
1184                    (!test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL,
1185                               &p2p->status)))
1186                        break;
1187                retry++;
1188
1189                /* if sta is connected or connecting, sleep for a while before
1190                 * retry af tx or finding a peer
1191                 */
1192                if (test_bit(BRCMF_VIF_STATUS_CONNECTED, &pri_vif->sme_state) ||
1193                    test_bit(BRCMF_VIF_STATUS_CONNECTING, &pri_vif->sme_state))
1194                        msleep(P2P_DEFAULT_SLEEP_TIME_VSDB);
1195        }
1196
1197        brcmf_dbg(TRACE, "Completed search/listen peer_chan=%d\n",
1198                  afx_hdl->peer_chan);
1199        afx_hdl->is_active = false;
1200
1201        clear_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status);
1202
1203        return afx_hdl->peer_chan;
1204}
1205
1206
1207/**
1208 * brcmf_p2p_scan_finding_common_channel() - was escan used for finding channel
1209 *
1210 * @cfg: common configuration struct.
1211 * @bi: bss info struct, result from scan.
1212 *
1213 */
1214bool brcmf_p2p_scan_finding_common_channel(struct brcmf_cfg80211_info *cfg,
1215                                           struct brcmf_bss_info_le *bi)
1216
1217{
1218        struct brcmf_p2p_info *p2p = &cfg->p2p;
1219        struct afx_hdl *afx_hdl = &p2p->afx_hdl;
1220        struct brcmu_chan ch;
1221        u8 *ie;
1222        s32 err;
1223        u8 p2p_dev_addr[ETH_ALEN];
1224
1225        if (!test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status))
1226                return false;
1227
1228        if (bi == NULL) {
1229                brcmf_dbg(TRACE, "ACTION FRAME SCAN Done\n");
1230                if (afx_hdl->peer_chan == P2P_INVALID_CHANNEL)
1231                        complete(&afx_hdl->act_frm_scan);
1232                return true;
1233        }
1234
1235        ie = ((u8 *)bi) + le16_to_cpu(bi->ie_offset);
1236        memset(p2p_dev_addr, 0, sizeof(p2p_dev_addr));
1237        err = cfg80211_get_p2p_attr(ie, le32_to_cpu(bi->ie_length),
1238                                    IEEE80211_P2P_ATTR_DEVICE_INFO,
1239                                    p2p_dev_addr, sizeof(p2p_dev_addr));
1240        if (err < 0)
1241                err = cfg80211_get_p2p_attr(ie, le32_to_cpu(bi->ie_length),
1242                                            IEEE80211_P2P_ATTR_DEVICE_ID,
1243                                            p2p_dev_addr, sizeof(p2p_dev_addr));
1244        if ((err >= 0) &&
1245            (ether_addr_equal(p2p_dev_addr, afx_hdl->tx_dst_addr))) {
1246                if (!bi->ctl_ch) {
1247                        ch.chspec = le16_to_cpu(bi->chanspec);
1248                        cfg->d11inf.decchspec(&ch);
1249                        bi->ctl_ch = ch.control_ch_num;
1250                }
1251                afx_hdl->peer_chan = bi->ctl_ch;
1252                brcmf_dbg(TRACE, "ACTION FRAME SCAN : Peer %pM found, channel : %d\n",
1253                          afx_hdl->tx_dst_addr, afx_hdl->peer_chan);
1254                complete(&afx_hdl->act_frm_scan);
1255        }
1256        return true;
1257}
1258
1259/**
1260 * brcmf_p2p_stop_wait_next_action_frame() - finish scan if af tx complete.
1261 *
1262 * @cfg: common configuration struct.
1263 *
1264 */
1265static void
1266brcmf_p2p_stop_wait_next_action_frame(struct brcmf_cfg80211_info *cfg)
1267{
1268        struct brcmf_p2p_info *p2p = &cfg->p2p;
1269        struct brcmf_if *ifp = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->ifp;
1270
1271        if (test_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status) &&
1272            (test_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status) ||
1273             test_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status))) {
1274                brcmf_dbg(TRACE, "*** Wake UP ** abort actframe iovar\n");
1275                /* if channel is not zero, "actfame" uses off channel scan.
1276                 * So abort scan for off channel completion.
1277                 */
1278                if (p2p->af_sent_channel)
1279                        brcmf_notify_escan_complete(cfg, ifp, true, true);
1280        } else if (test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_AF_LISTEN,
1281                            &p2p->status)) {
1282                brcmf_dbg(TRACE, "*** Wake UP ** abort listen for next af frame\n");
1283                /* So abort scan to cancel listen */
1284                brcmf_notify_escan_complete(cfg, ifp, true, true);
1285        }
1286}
1287
1288
1289/**
1290 * brcmf_p2p_gon_req_collision() - Check if go negotiaton collission
1291 *
1292 * @p2p: p2p device info struct.
1293 *
1294 * return true if recevied action frame is to be dropped.
1295 */
1296static bool
1297brcmf_p2p_gon_req_collision(struct brcmf_p2p_info *p2p, u8 *mac)
1298{
1299        struct brcmf_cfg80211_info *cfg = p2p->cfg;
1300        struct brcmf_if *ifp;
1301
1302        brcmf_dbg(TRACE, "Enter\n");
1303
1304        if (!test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status) ||
1305            !p2p->gon_req_action)
1306                return false;
1307
1308        brcmf_dbg(TRACE, "GO Negotiation Request COLLISION !!!\n");
1309        /* if sa(peer) addr is less than da(my) addr, then this device
1310         * process peer's gon request and block to send gon req.
1311         * if not (sa addr > da addr),
1312         * this device will process gon request and drop gon req of peer.
1313         */
1314        ifp = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif->ifp;
1315        if (memcmp(mac, ifp->mac_addr, ETH_ALEN) < 0) {
1316                brcmf_dbg(INFO, "Block transmit gon req !!!\n");
1317                p2p->block_gon_req_tx = true;
1318                /* if we are finding a common channel for sending af,
1319                 * do not scan more to block to send current gon req
1320                 */
1321                if (test_and_clear_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL,
1322                                       &p2p->status))
1323                        complete(&p2p->afx_hdl.act_frm_scan);
1324                if (test_and_clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME,
1325                                       &p2p->status))
1326                        brcmf_p2p_stop_wait_next_action_frame(cfg);
1327                return false;
1328        }
1329
1330        /* drop gon request of peer to process gon request by this device. */
1331        brcmf_dbg(INFO, "Drop received gon req !!!\n");
1332
1333        return true;
1334}
1335
1336
1337/**
1338 * brcmf_p2p_notify_action_frame_rx() - received action frame.
1339 *
1340 * @ifp: interfac control.
1341 * @e: event message. Not used, to make it usable for fweh event dispatcher.
1342 * @data: payload of message, containing action frame data.
1343 *
1344 */
1345int brcmf_p2p_notify_action_frame_rx(struct brcmf_if *ifp,
1346                                     const struct brcmf_event_msg *e,
1347                                     void *data)
1348{
1349        struct brcmf_cfg80211_info *cfg = ifp->drvr->config;
1350        struct brcmf_p2p_info *p2p = &cfg->p2p;
1351        struct afx_hdl *afx_hdl = &p2p->afx_hdl;
1352        struct wireless_dev *wdev;
1353        u32 mgmt_frame_len = e->datalen - sizeof(struct brcmf_rx_mgmt_data);
1354        struct brcmf_rx_mgmt_data *rxframe = (struct brcmf_rx_mgmt_data *)data;
1355        u8 *frame = (u8 *)(rxframe + 1);
1356        struct brcmf_p2p_pub_act_frame *act_frm;
1357        struct brcmf_p2psd_gas_pub_act_frame *sd_act_frm;
1358        struct brcmu_chan ch;
1359        struct ieee80211_mgmt *mgmt_frame;
1360        s32 freq;
1361        u16 mgmt_type;
1362        u8 action;
1363
1364        if (e->datalen < sizeof(*rxframe)) {
1365                brcmf_dbg(SCAN, "Event data to small. Ignore\n");
1366                return 0;
1367        }
1368
1369        ch.chspec = be16_to_cpu(rxframe->chanspec);
1370        cfg->d11inf.decchspec(&ch);
1371        /* Check if wpa_supplicant has registered for this frame */
1372        brcmf_dbg(INFO, "ifp->vif->mgmt_rx_reg %04x\n", ifp->vif->mgmt_rx_reg);
1373        mgmt_type = (IEEE80211_STYPE_ACTION & IEEE80211_FCTL_STYPE) >> 4;
1374        if ((ifp->vif->mgmt_rx_reg & BIT(mgmt_type)) == 0)
1375                return 0;
1376
1377        brcmf_p2p_print_actframe(false, frame, mgmt_frame_len);
1378
1379        action = P2P_PAF_SUBTYPE_INVALID;
1380        if (brcmf_p2p_is_pub_action(frame, mgmt_frame_len)) {
1381                act_frm = (struct brcmf_p2p_pub_act_frame *)frame;
1382                action = act_frm->subtype;
1383                if ((action == P2P_PAF_GON_REQ) &&
1384                    (brcmf_p2p_gon_req_collision(p2p, (u8 *)e->addr))) {
1385                        if (test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL,
1386                                     &p2p->status) &&
1387                            (ether_addr_equal(afx_hdl->tx_dst_addr, e->addr))) {
1388                                afx_hdl->peer_chan = ch.control_ch_num;
1389                                brcmf_dbg(INFO, "GON request: Peer found, channel=%d\n",
1390                                          afx_hdl->peer_chan);
1391                                complete(&afx_hdl->act_frm_scan);
1392                        }
1393                        return 0;
1394                }
1395                /* After complete GO Negotiation, roll back to mpc mode */
1396                if ((action == P2P_PAF_GON_CONF) ||
1397                    (action == P2P_PAF_PROVDIS_RSP))
1398                        brcmf_set_mpc(ifp, 1);
1399                if (action == P2P_PAF_GON_CONF) {
1400                        brcmf_dbg(TRACE, "P2P: GO_NEG_PHASE status cleared\n");
1401                        clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status);
1402                }
1403        } else if (brcmf_p2p_is_gas_action(frame, mgmt_frame_len)) {
1404                sd_act_frm = (struct brcmf_p2psd_gas_pub_act_frame *)frame;
1405                action = sd_act_frm->action;
1406        }
1407
1408        if (test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status) &&
1409            (p2p->next_af_subtype == action)) {
1410                brcmf_dbg(TRACE, "We got a right next frame! (%d)\n", action);
1411                clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME,
1412                          &p2p->status);
1413                /* Stop waiting for next AF. */
1414                brcmf_p2p_stop_wait_next_action_frame(cfg);
1415        }
1416
1417        mgmt_frame = kzalloc(offsetof(struct ieee80211_mgmt, u) +
1418                             mgmt_frame_len, GFP_KERNEL);
1419        if (!mgmt_frame) {
1420                brcmf_err("No memory available for action frame\n");
1421                return -ENOMEM;
1422        }
1423        memcpy(mgmt_frame->da, ifp->mac_addr, ETH_ALEN);
1424        brcmf_fil_cmd_data_get(ifp, BRCMF_C_GET_BSSID, mgmt_frame->bssid,
1425                               ETH_ALEN);
1426        memcpy(mgmt_frame->sa, e->addr, ETH_ALEN);
1427        mgmt_frame->frame_control = cpu_to_le16(IEEE80211_STYPE_ACTION);
1428        memcpy(&mgmt_frame->u, frame, mgmt_frame_len);
1429        mgmt_frame_len += offsetof(struct ieee80211_mgmt, u);
1430
1431        freq = ieee80211_channel_to_frequency(ch.control_ch_num,
1432                                              ch.band == BRCMU_CHAN_BAND_2G ?
1433                                              NL80211_BAND_2GHZ :
1434                                              NL80211_BAND_5GHZ);
1435
1436        wdev = &ifp->vif->wdev;
1437        cfg80211_rx_mgmt(wdev, freq, 0, (u8 *)mgmt_frame, mgmt_frame_len, 0);
1438
1439        kfree(mgmt_frame);
1440        return 0;
1441}
1442
1443
1444/**
1445 * brcmf_p2p_notify_action_tx_complete() - transmit action frame complete
1446 *
1447 * @ifp: interfac control.
1448 * @e: event message. Not used, to make it usable for fweh event dispatcher.
1449 * @data: not used.
1450 *
1451 */
1452int brcmf_p2p_notify_action_tx_complete(struct brcmf_if *ifp,
1453                                        const struct brcmf_event_msg *e,
1454                                        void *data)
1455{
1456        struct brcmf_cfg80211_info *cfg = ifp->drvr->config;
1457        struct brcmf_p2p_info *p2p = &cfg->p2p;
1458
1459        brcmf_dbg(INFO, "Enter: event %s, status=%d\n",
1460                  e->event_code == BRCMF_E_ACTION_FRAME_OFF_CHAN_COMPLETE ?
1461                  "ACTION_FRAME_OFF_CHAN_COMPLETE" : "ACTION_FRAME_COMPLETE",
1462                  e->status);
1463
1464        if (!test_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status))
1465                return 0;
1466
1467        if (e->event_code == BRCMF_E_ACTION_FRAME_COMPLETE) {
1468                if (e->status == BRCMF_E_STATUS_SUCCESS)
1469                        set_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED,
1470                                &p2p->status);
1471                else {
1472                        set_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status);
1473                        /* If there is no ack, we don't need to wait for
1474                         * WLC_E_ACTION_FRAME_OFFCHAN_COMPLETE event
1475                         */
1476                        brcmf_p2p_stop_wait_next_action_frame(cfg);
1477                }
1478
1479        } else {
1480                complete(&p2p->send_af_done);
1481        }
1482        return 0;
1483}
1484
1485
1486/**
1487 * brcmf_p2p_tx_action_frame() - send action frame over fil.
1488 *
1489 * @p2p: p2p info struct for vif.
1490 * @af_params: action frame data/info.
1491 *
1492 * Send an action frame immediately without doing channel synchronization.
1493 *
1494 * This function waits for a completion event before returning.
1495 * The WLC_E_ACTION_FRAME_COMPLETE event will be received when the action
1496 * frame is transmitted.
1497 */
1498static s32 brcmf_p2p_tx_action_frame(struct brcmf_p2p_info *p2p,
1499                                     struct brcmf_fil_af_params_le *af_params)
1500{
1501        struct brcmf_cfg80211_vif *vif;
1502        s32 err = 0;
1503        s32 timeout = 0;
1504
1505        brcmf_dbg(TRACE, "Enter\n");
1506
1507        reinit_completion(&p2p->send_af_done);
1508        clear_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status);
1509        clear_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status);
1510
1511        vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif;
1512        err = brcmf_fil_bsscfg_data_set(vif->ifp, "actframe", af_params,
1513                                        sizeof(*af_params));
1514        if (err) {
1515                brcmf_err(" sending action frame has failed\n");
1516                goto exit;
1517        }
1518
1519        p2p->af_sent_channel = le32_to_cpu(af_params->channel);
1520        p2p->af_tx_sent_jiffies = jiffies;
1521
1522        timeout = wait_for_completion_timeout(&p2p->send_af_done,
1523                                              P2P_AF_MAX_WAIT_TIME);
1524
1525        if (test_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status)) {
1526                brcmf_dbg(TRACE, "TX action frame operation is success\n");
1527        } else {
1528                err = -EIO;
1529                brcmf_dbg(TRACE, "TX action frame operation has failed\n");
1530        }
1531        /* clear status bit for action tx */
1532        clear_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status);
1533        clear_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status);
1534
1535exit:
1536        return err;
1537}
1538
1539
1540/**
1541 * brcmf_p2p_pub_af_tx() - public action frame tx routine.
1542 *
1543 * @cfg: driver private data for cfg80211 interface.
1544 * @af_params: action frame data/info.
1545 * @config_af_params: configuration data for action frame.
1546 *
1547 * routine which transmits ation frame public type.
1548 */
1549static s32 brcmf_p2p_pub_af_tx(struct brcmf_cfg80211_info *cfg,
1550                               struct brcmf_fil_af_params_le *af_params,
1551                               struct brcmf_config_af_params *config_af_params)
1552{
1553        struct brcmf_p2p_info *p2p = &cfg->p2p;
1554        struct brcmf_fil_action_frame_le *action_frame;
1555        struct brcmf_p2p_pub_act_frame *act_frm;
1556        s32 err = 0;
1557        u16 ie_len;
1558
1559        action_frame = &af_params->action_frame;
1560        act_frm = (struct brcmf_p2p_pub_act_frame *)(action_frame->data);
1561
1562        config_af_params->extra_listen = true;
1563
1564        switch (act_frm->subtype) {
1565        case P2P_PAF_GON_REQ:
1566                brcmf_dbg(TRACE, "P2P: GO_NEG_PHASE status set\n");
1567                set_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status);
1568                config_af_params->mpc_onoff = 0;
1569                config_af_params->search_channel = true;
1570                p2p->next_af_subtype = act_frm->subtype + 1;
1571                p2p->gon_req_action = true;
1572                /* increase dwell time to wait for RESP frame */
1573                af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME);
1574                break;
1575        case P2P_PAF_GON_RSP:
1576                p2p->next_af_subtype = act_frm->subtype + 1;
1577                /* increase dwell time to wait for CONF frame */
1578                af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME);
1579                break;
1580        case P2P_PAF_GON_CONF:
1581                /* If we reached till GO Neg confirmation reset the filter */
1582                brcmf_dbg(TRACE, "P2P: GO_NEG_PHASE status cleared\n");
1583                clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status);
1584                /* turn on mpc again if go nego is done */
1585                config_af_params->mpc_onoff = 1;
1586                /* minimize dwell time */
1587                af_params->dwell_time = cpu_to_le32(P2P_AF_MIN_DWELL_TIME);
1588                config_af_params->extra_listen = false;
1589                break;
1590        case P2P_PAF_INVITE_REQ:
1591                config_af_params->search_channel = true;
1592                p2p->next_af_subtype = act_frm->subtype + 1;
1593                /* increase dwell time */
1594                af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME);
1595                break;
1596        case P2P_PAF_INVITE_RSP:
1597                /* minimize dwell time */
1598                af_params->dwell_time = cpu_to_le32(P2P_AF_MIN_DWELL_TIME);
1599                config_af_params->extra_listen = false;
1600                break;
1601        case P2P_PAF_DEVDIS_REQ:
1602                config_af_params->search_channel = true;
1603                p2p->next_af_subtype = act_frm->subtype + 1;
1604                /* maximize dwell time to wait for RESP frame */
1605                af_params->dwell_time = cpu_to_le32(P2P_AF_LONG_DWELL_TIME);
1606                break;
1607        case P2P_PAF_DEVDIS_RSP:
1608                /* minimize dwell time */
1609                af_params->dwell_time = cpu_to_le32(P2P_AF_MIN_DWELL_TIME);
1610                config_af_params->extra_listen = false;
1611                break;
1612        case P2P_PAF_PROVDIS_REQ:
1613                ie_len = le16_to_cpu(action_frame->len) -
1614                         offsetof(struct brcmf_p2p_pub_act_frame, elts);
1615                if (cfg80211_get_p2p_attr(&act_frm->elts[0], ie_len,
1616                                          IEEE80211_P2P_ATTR_GROUP_ID,
1617                                          NULL, 0) < 0)
1618                        config_af_params->search_channel = true;
1619                config_af_params->mpc_onoff = 0;
1620                p2p->next_af_subtype = act_frm->subtype + 1;
1621                /* increase dwell time to wait for RESP frame */
1622                af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME);
1623                break;
1624        case P2P_PAF_PROVDIS_RSP:
1625                /* wpa_supplicant send go nego req right after prov disc */
1626                p2p->next_af_subtype = P2P_PAF_GON_REQ;
1627                /* increase dwell time to MED level */
1628                af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME);
1629                config_af_params->extra_listen = false;
1630                break;
1631        default:
1632                brcmf_err("Unknown p2p pub act frame subtype: %d\n",
1633                          act_frm->subtype);
1634                err = -EINVAL;
1635        }
1636        return err;
1637}
1638
1639/**
1640 * brcmf_p2p_send_action_frame() - send action frame .
1641 *
1642 * @cfg: driver private data for cfg80211 interface.
1643 * @ndev: net device to transmit on.
1644 * @af_params: configuration data for action frame.
1645 */
1646bool brcmf_p2p_send_action_frame(struct brcmf_cfg80211_info *cfg,
1647                                 struct net_device *ndev,
1648                                 struct brcmf_fil_af_params_le *af_params)
1649{
1650        struct brcmf_p2p_info *p2p = &cfg->p2p;
1651        struct brcmf_if *ifp = netdev_priv(ndev);
1652        struct brcmf_fil_action_frame_le *action_frame;
1653        struct brcmf_config_af_params config_af_params;
1654        struct afx_hdl *afx_hdl = &p2p->afx_hdl;
1655        u16 action_frame_len;
1656        bool ack = false;
1657        u8 category;
1658        u8 action;
1659        s32 tx_retry;
1660        s32 extra_listen_time;
1661        uint delta_ms;
1662
1663        action_frame = &af_params->action_frame;
1664        action_frame_len = le16_to_cpu(action_frame->len);
1665
1666        brcmf_p2p_print_actframe(true, action_frame->data, action_frame_len);
1667
1668        /* Add the default dwell time. Dwell time to stay off-channel */
1669        /* to wait for a response action frame after transmitting an  */
1670        /* GO Negotiation action frame                                */
1671        af_params->dwell_time = cpu_to_le32(P2P_AF_DWELL_TIME);
1672
1673        category = action_frame->data[DOT11_ACTION_CAT_OFF];
1674        action = action_frame->data[DOT11_ACTION_ACT_OFF];
1675
1676        /* initialize variables */
1677        p2p->next_af_subtype = P2P_PAF_SUBTYPE_INVALID;
1678        p2p->gon_req_action = false;
1679
1680        /* config parameters */
1681        config_af_params.mpc_onoff = -1;
1682        config_af_params.search_channel = false;
1683        config_af_params.extra_listen = false;
1684
1685        if (brcmf_p2p_is_pub_action(action_frame->data, action_frame_len)) {
1686                /* p2p public action frame process */
1687                if (brcmf_p2p_pub_af_tx(cfg, af_params, &config_af_params)) {
1688                        /* Just send unknown subtype frame with */
1689                        /* default parameters.                  */
1690                        brcmf_err("P2P Public action frame, unknown subtype.\n");
1691                }
1692        } else if (brcmf_p2p_is_gas_action(action_frame->data,
1693                                           action_frame_len)) {
1694                /* service discovery process */
1695                if (action == P2PSD_ACTION_ID_GAS_IREQ ||
1696                    action == P2PSD_ACTION_ID_GAS_CREQ) {
1697                        /* configure service discovery query frame */
1698                        config_af_params.search_channel = true;
1699
1700                        /* save next af suptype to cancel */
1701                        /* remaining dwell time           */
1702                        p2p->next_af_subtype = action + 1;
1703
1704                        af_params->dwell_time =
1705                                cpu_to_le32(P2P_AF_MED_DWELL_TIME);
1706                } else if (action == P2PSD_ACTION_ID_GAS_IRESP ||
1707                           action == P2PSD_ACTION_ID_GAS_CRESP) {
1708                        /* configure service discovery response frame */
1709                        af_params->dwell_time =
1710                                cpu_to_le32(P2P_AF_MIN_DWELL_TIME);
1711                } else {
1712                        brcmf_err("Unknown action type: %d\n", action);
1713                        goto exit;
1714                }
1715        } else if (brcmf_p2p_is_p2p_action(action_frame->data,
1716                                           action_frame_len)) {
1717                /* do not configure anything. it will be */
1718                /* sent with a default configuration     */
1719        } else {
1720                brcmf_err("Unknown Frame: category 0x%x, action 0x%x\n",
1721                          category, action);
1722                return false;
1723        }
1724
1725        /* if connecting on primary iface, sleep for a while before sending
1726         * af tx for VSDB
1727         */
1728        if (test_bit(BRCMF_VIF_STATUS_CONNECTING,
1729                     &p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->sme_state))
1730                msleep(50);
1731
1732        /* if scan is ongoing, abort current scan. */
1733        if (test_bit(BRCMF_SCAN_STATUS_BUSY, &cfg->scan_status))
1734                brcmf_abort_scanning(cfg);
1735
1736        memcpy(afx_hdl->tx_dst_addr, action_frame->da, ETH_ALEN);
1737
1738        /* To make sure to send successfully action frame, turn off mpc */
1739        if (config_af_params.mpc_onoff == 0)
1740                brcmf_set_mpc(ifp, 0);
1741
1742        /* set status and destination address before sending af */
1743        if (p2p->next_af_subtype != P2P_PAF_SUBTYPE_INVALID) {
1744                /* set status to cancel the remained dwell time in rx process */
1745                set_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status);
1746        }
1747
1748        p2p->af_sent_channel = 0;
1749        set_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status);
1750        /* validate channel and p2p ies */
1751        if (config_af_params.search_channel &&
1752            IS_P2P_SOCIAL_CHANNEL(le32_to_cpu(af_params->channel)) &&
1753            p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif->saved_ie.probe_req_ie_len) {
1754                afx_hdl = &p2p->afx_hdl;
1755                afx_hdl->peer_listen_chan = le32_to_cpu(af_params->channel);
1756
1757                if (brcmf_p2p_af_searching_channel(p2p) ==
1758                                                        P2P_INVALID_CHANNEL) {
1759                        brcmf_err("Couldn't find peer's channel.\n");
1760                        goto exit;
1761                }
1762
1763                /* Abort scan even for VSDB scenarios. Scan gets aborted in
1764                 * firmware but after the check of piggyback algorithm. To take
1765                 * care of current piggback algo, lets abort the scan here
1766                 * itself.
1767                 */
1768                brcmf_notify_escan_complete(cfg, ifp, true, true);
1769
1770                /* update channel */
1771                af_params->channel = cpu_to_le32(afx_hdl->peer_chan);
1772        }
1773
1774        tx_retry = 0;
1775        while (!p2p->block_gon_req_tx &&
1776               (ack == false) && (tx_retry < P2P_AF_TX_MAX_RETRY)) {
1777                ack = !brcmf_p2p_tx_action_frame(p2p, af_params);
1778                tx_retry++;
1779        }
1780        if (ack == false) {
1781                brcmf_err("Failed to send Action Frame(retry %d)\n", tx_retry);
1782                clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status);
1783        }
1784
1785exit:
1786        clear_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status);
1787
1788        /* WAR: sometimes dongle does not keep the dwell time of 'actframe'.
1789         * if we coundn't get the next action response frame and dongle does
1790         * not keep the dwell time, go to listen state again to get next action
1791         * response frame.
1792         */
1793        if (ack && config_af_params.extra_listen && !p2p->block_gon_req_tx &&
1794            test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status) &&
1795            p2p->af_sent_channel == afx_hdl->my_listen_chan) {
1796                delta_ms = jiffies_to_msecs(jiffies - p2p->af_tx_sent_jiffies);
1797                if (le32_to_cpu(af_params->dwell_time) > delta_ms)
1798                        extra_listen_time = le32_to_cpu(af_params->dwell_time) -
1799                                            delta_ms;
1800                else
1801                        extra_listen_time = 0;
1802                if (extra_listen_time > 50) {
1803                        set_bit(BRCMF_P2P_STATUS_WAITING_NEXT_AF_LISTEN,
1804                                &p2p->status);
1805                        brcmf_dbg(INFO, "Wait more time! actual af time:%d, calculated extra listen:%d\n",
1806                                  le32_to_cpu(af_params->dwell_time),
1807                                  extra_listen_time);
1808                        extra_listen_time += 100;
1809                        if (!brcmf_p2p_discover_listen(p2p,
1810                                                       p2p->af_sent_channel,
1811                                                       extra_listen_time)) {
1812                                unsigned long duration;
1813
1814                                extra_listen_time += 100;
1815                                duration = msecs_to_jiffies(extra_listen_time);
1816                                wait_for_completion_timeout(&p2p->wait_next_af,
1817                                                            duration);
1818                        }
1819                        clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_AF_LISTEN,
1820                                  &p2p->status);
1821                }
1822        }
1823
1824        if (p2p->block_gon_req_tx) {
1825                /* if ack is true, supplicant will wait more time(100ms).
1826                 * so we will return it as a success to get more time .
1827                 */
1828                p2p->block_gon_req_tx = false;
1829                ack = true;
1830        }
1831
1832        clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status);
1833        /* if all done, turn mpc on again */
1834        if (config_af_params.mpc_onoff == 1)
1835                brcmf_set_mpc(ifp, 1);
1836
1837        return ack;
1838}
1839
1840/**
1841 * brcmf_p2p_notify_rx_mgmt_p2p_probereq() - Event handler for p2p probe req.
1842 *
1843 * @ifp: interface pointer for which event was received.
1844 * @e: even message.
1845 * @data: payload of event message (probe request).
1846 */
1847s32 brcmf_p2p_notify_rx_mgmt_p2p_probereq(struct brcmf_if *ifp,
1848                                          const struct brcmf_event_msg *e,
1849                                          void *data)
1850{
1851        struct brcmf_cfg80211_info *cfg = ifp->drvr->config;
1852        struct brcmf_p2p_info *p2p = &cfg->p2p;
1853        struct afx_hdl *afx_hdl = &p2p->afx_hdl;
1854        struct brcmf_cfg80211_vif *vif = ifp->vif;
1855        struct brcmf_rx_mgmt_data *rxframe = (struct brcmf_rx_mgmt_data *)data;
1856        u16 chanspec = be16_to_cpu(rxframe->chanspec);
1857        struct brcmu_chan ch;
1858        u8 *mgmt_frame;
1859        u32 mgmt_frame_len;
1860        s32 freq;
1861        u16 mgmt_type;
1862
1863        brcmf_dbg(INFO, "Enter: event %d reason %d\n", e->event_code,
1864                  e->reason);
1865
1866        if (e->datalen < sizeof(*rxframe)) {
1867                brcmf_dbg(SCAN, "Event data to small. Ignore\n");
1868                return 0;
1869        }
1870
1871        ch.chspec = be16_to_cpu(rxframe->chanspec);
1872        cfg->d11inf.decchspec(&ch);
1873
1874        if (test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status) &&
1875            (ether_addr_equal(afx_hdl->tx_dst_addr, e->addr))) {
1876                afx_hdl->peer_chan = ch.control_ch_num;
1877                brcmf_dbg(INFO, "PROBE REQUEST: Peer found, channel=%d\n",
1878                          afx_hdl->peer_chan);
1879                complete(&afx_hdl->act_frm_scan);
1880        }
1881
1882        /* Firmware sends us two proberesponses for each idx one. At the */
1883        /* moment anything but bsscfgidx 0 is passed up to supplicant    */
1884        if (e->bsscfgidx == 0)
1885                return 0;
1886
1887        /* Filter any P2P probe reqs arriving during the GO-NEG Phase */
1888        if (test_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status)) {
1889                brcmf_dbg(INFO, "Filtering P2P probe_req in GO-NEG phase\n");
1890                return 0;
1891        }
1892
1893        /* Check if wpa_supplicant has registered for this frame */
1894        brcmf_dbg(INFO, "vif->mgmt_rx_reg %04x\n", vif->mgmt_rx_reg);
1895        mgmt_type = (IEEE80211_STYPE_PROBE_REQ & IEEE80211_FCTL_STYPE) >> 4;
1896        if ((vif->mgmt_rx_reg & BIT(mgmt_type)) == 0)
1897                return 0;
1898
1899        mgmt_frame = (u8 *)(rxframe + 1);
1900        mgmt_frame_len = e->datalen - sizeof(*rxframe);
1901        freq = ieee80211_channel_to_frequency(ch.control_ch_num,
1902                                              ch.band == BRCMU_CHAN_BAND_2G ?
1903                                              NL80211_BAND_2GHZ :
1904                                              NL80211_BAND_5GHZ);
1905
1906        cfg80211_rx_mgmt(&vif->wdev, freq, 0, mgmt_frame, mgmt_frame_len, 0);
1907
1908        brcmf_dbg(INFO, "mgmt_frame_len (%d) , e->datalen (%d), chanspec (%04x), freq (%d)\n",
1909                  mgmt_frame_len, e->datalen, chanspec, freq);
1910
1911        return 0;
1912}
1913
1914
1915/**
1916 * brcmf_p2p_get_current_chanspec() - Get current operation channel.
1917 *
1918 * @p2p: P2P specific data.
1919 * @chanspec: chanspec to be returned.
1920 */
1921static void brcmf_p2p_get_current_chanspec(struct brcmf_p2p_info *p2p,
1922                                           u16 *chanspec)
1923{
1924        struct brcmf_if *ifp;
1925        u8 mac_addr[ETH_ALEN];
1926        struct brcmu_chan ch;
1927        struct brcmf_bss_info_le *bi;
1928        u8 *buf;
1929
1930        ifp = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->ifp;
1931
1932        if (brcmf_fil_cmd_data_get(ifp, BRCMF_C_GET_BSSID, mac_addr,
1933                                   ETH_ALEN) == 0) {
1934                buf = kzalloc(WL_BSS_INFO_MAX, GFP_KERNEL);
1935                if (buf != NULL) {
1936                        *(__le32 *)buf = cpu_to_le32(WL_BSS_INFO_MAX);
1937                        if (brcmf_fil_cmd_data_get(ifp, BRCMF_C_GET_BSS_INFO,
1938                                                   buf, WL_BSS_INFO_MAX) == 0) {
1939                                bi = (struct brcmf_bss_info_le *)(buf + 4);
1940                                *chanspec = le16_to_cpu(bi->chanspec);
1941                                kfree(buf);
1942                                return;
1943                        }
1944                        kfree(buf);
1945                }
1946        }
1947        /* Use default channel for P2P */
1948        ch.chnum = BRCMF_P2P_TEMP_CHAN;
1949        ch.bw = BRCMU_CHAN_BW_20;
1950        p2p->cfg->d11inf.encchspec(&ch);
1951        *chanspec = ch.chspec;
1952}
1953
1954/**
1955 * Change a P2P Role.
1956 * Parameters:
1957 * @mac: MAC address of the BSS to change a role
1958 * Returns 0 if success.
1959 */
1960int brcmf_p2p_ifchange(struct brcmf_cfg80211_info *cfg,
1961                       enum brcmf_fil_p2p_if_types if_type)
1962{
1963        struct brcmf_p2p_info *p2p = &cfg->p2p;
1964        struct brcmf_cfg80211_vif *vif;
1965        struct brcmf_fil_p2p_if_le if_request;
1966        s32 err;
1967        u16 chanspec;
1968
1969        brcmf_dbg(TRACE, "Enter\n");
1970
1971        vif = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif;
1972        if (!vif) {
1973                brcmf_err("vif for P2PAPI_BSSCFG_PRIMARY does not exist\n");
1974                return -EPERM;
1975        }
1976        brcmf_notify_escan_complete(cfg, vif->ifp, true, true);
1977        vif = p2p->bss_idx[P2PAPI_BSSCFG_CONNECTION].vif;
1978        if (!vif) {
1979                brcmf_err("vif for P2PAPI_BSSCFG_CONNECTION does not exist\n");
1980                return -EPERM;
1981        }
1982        brcmf_set_mpc(vif->ifp, 0);
1983
1984        /* In concurrency case, STA may be already associated in a particular */
1985        /* channel. so retrieve the current channel of primary interface and  */
1986        /* then start the virtual interface on that.                          */
1987        brcmf_p2p_get_current_chanspec(p2p, &chanspec);
1988
1989        if_request.type = cpu_to_le16((u16)if_type);
1990        if_request.chspec = cpu_to_le16(chanspec);
1991        memcpy(if_request.addr, p2p->int_addr, sizeof(if_request.addr));
1992
1993        brcmf_cfg80211_arm_vif_event(cfg, vif);
1994        err = brcmf_fil_iovar_data_set(vif->ifp, "p2p_ifupd", &if_request,
1995                                       sizeof(if_request));
1996        if (err) {
1997                brcmf_err("p2p_ifupd FAILED, err=%d\n", err);
1998                brcmf_cfg80211_arm_vif_event(cfg, NULL);
1999                return err;
2000        }
2001        err = brcmf_cfg80211_wait_vif_event(cfg, BRCMF_E_IF_CHANGE,
2002                                            BRCMF_VIF_EVENT_TIMEOUT);
2003        brcmf_cfg80211_arm_vif_event(cfg, NULL);
2004        if (!err)  {
2005                brcmf_err("No BRCMF_E_IF_CHANGE event received\n");
2006                return -EIO;
2007        }
2008
2009        err = brcmf_fil_cmd_int_set(vif->ifp, BRCMF_C_SET_SCB_TIMEOUT,
2010                                    BRCMF_SCB_TIMEOUT_VALUE);
2011
2012        return err;
2013}
2014
2015static int brcmf_p2p_request_p2p_if(struct brcmf_p2p_info *p2p,
2016                                    struct brcmf_if *ifp, u8 ea[ETH_ALEN],
2017                                    enum brcmf_fil_p2p_if_types iftype)
2018{
2019        struct brcmf_fil_p2p_if_le if_request;
2020        int err;
2021        u16 chanspec;
2022
2023        /* we need a default channel */
2024        brcmf_p2p_get_current_chanspec(p2p, &chanspec);
2025
2026        /* fill the firmware request */
2027        memcpy(if_request.addr, ea, ETH_ALEN);
2028        if_request.type = cpu_to_le16((u16)iftype);
2029        if_request.chspec = cpu_to_le16(chanspec);
2030
2031        err = brcmf_fil_iovar_data_set(ifp, "p2p_ifadd", &if_request,
2032                                       sizeof(if_request));
2033
2034        return err;
2035}
2036
2037static int brcmf_p2p_disable_p2p_if(struct brcmf_cfg80211_vif *vif)
2038{
2039        struct brcmf_cfg80211_info *cfg = wdev_to_cfg(&vif->wdev);
2040        struct net_device *pri_ndev = cfg_to_ndev(cfg);
2041        struct brcmf_if *ifp = netdev_priv(pri_ndev);
2042        u8 *addr = vif->wdev.netdev->dev_addr;
2043
2044        return brcmf_fil_iovar_data_set(ifp, "p2p_ifdis", addr, ETH_ALEN);
2045}
2046
2047static int brcmf_p2p_release_p2p_if(struct brcmf_cfg80211_vif *vif)
2048{
2049        struct brcmf_cfg80211_info *cfg = wdev_to_cfg(&vif->wdev);
2050        struct net_device *pri_ndev = cfg_to_ndev(cfg);
2051        struct brcmf_if *ifp = netdev_priv(pri_ndev);
2052        u8 *addr = vif->wdev.netdev->dev_addr;
2053
2054        return brcmf_fil_iovar_data_set(ifp, "p2p_ifdel", addr, ETH_ALEN);
2055}
2056
2057/**
2058 * brcmf_p2p_create_p2pdev() - create a P2P_DEVICE virtual interface.
2059 *
2060 * @p2p: P2P specific data.
2061 * @wiphy: wiphy device of new interface.
2062 * @addr: mac address for this new interface.
2063 */
2064static struct wireless_dev *brcmf_p2p_create_p2pdev(struct brcmf_p2p_info *p2p,
2065                                                    struct wiphy *wiphy,
2066                                                    u8 *addr)
2067{
2068        struct brcmf_cfg80211_vif *p2p_vif;
2069        struct brcmf_if *p2p_ifp;
2070        struct brcmf_if *pri_ifp;
2071        int err;
2072        u32 bsscfgidx;
2073
2074        if (p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif)
2075                return ERR_PTR(-ENOSPC);
2076
2077        p2p_vif = brcmf_alloc_vif(p2p->cfg, NL80211_IFTYPE_P2P_DEVICE);
2078        if (IS_ERR(p2p_vif)) {
2079                brcmf_err("could not create discovery vif\n");
2080                return (struct wireless_dev *)p2p_vif;
2081        }
2082
2083        pri_ifp = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->ifp;
2084        brcmf_p2p_generate_bss_mac(p2p, addr);
2085        brcmf_p2p_set_firmware(pri_ifp, p2p->dev_addr);
2086
2087        brcmf_cfg80211_arm_vif_event(p2p->cfg, p2p_vif);
2088        brcmf_fweh_p2pdev_setup(pri_ifp, true);
2089
2090        /* Initialize P2P Discovery in the firmware */
2091        err = brcmf_fil_iovar_int_set(pri_ifp, "p2p_disc", 1);
2092        if (err < 0) {
2093                brcmf_err("set p2p_disc error\n");
2094                brcmf_fweh_p2pdev_setup(pri_ifp, false);
2095                brcmf_cfg80211_arm_vif_event(p2p->cfg, NULL);
2096                goto fail;
2097        }
2098
2099        /* wait for firmware event */
2100        err = brcmf_cfg80211_wait_vif_event(p2p->cfg, BRCMF_E_IF_ADD,
2101                                            BRCMF_VIF_EVENT_TIMEOUT);
2102        brcmf_cfg80211_arm_vif_event(p2p->cfg, NULL);
2103        brcmf_fweh_p2pdev_setup(pri_ifp, false);
2104        if (!err) {
2105                brcmf_err("timeout occurred\n");
2106                err = -EIO;
2107                goto fail;
2108        }
2109
2110        /* discovery interface created */
2111        p2p_ifp = p2p_vif->ifp;
2112        p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif = p2p_vif;
2113        memcpy(p2p_ifp->mac_addr, p2p->dev_addr, ETH_ALEN);
2114        memcpy(&p2p_vif->wdev.address, p2p->dev_addr, sizeof(p2p->dev_addr));
2115
2116        /* verify bsscfg index for P2P discovery */
2117        err = brcmf_fil_iovar_int_get(pri_ifp, "p2p_dev", &bsscfgidx);
2118        if (err < 0) {
2119                brcmf_err("retrieving discover bsscfg index failed\n");
2120                goto fail;
2121        }
2122
2123        WARN_ON(p2p_ifp->bsscfgidx != bsscfgidx);
2124
2125        init_completion(&p2p->send_af_done);
2126        INIT_WORK(&p2p->afx_hdl.afx_work, brcmf_p2p_afx_handler);
2127        init_completion(&p2p->afx_hdl.act_frm_scan);
2128        init_completion(&p2p->wait_next_af);
2129
2130        return &p2p_vif->wdev;
2131
2132fail:
2133        brcmf_free_vif(p2p_vif);
2134        return ERR_PTR(err);
2135}
2136
2137/**
2138 * brcmf_p2p_add_vif() - create a new P2P virtual interface.
2139 *
2140 * @wiphy: wiphy device of new interface.
2141 * @name: name of the new interface.
2142 * @name_assign_type: origin of the interface name
2143 * @type: nl80211 interface type.
2144 * @flags: not used.
2145 * @params: contains mac address for P2P device.
2146 */
2147struct wireless_dev *brcmf_p2p_add_vif(struct wiphy *wiphy, const char *name,
2148                                       unsigned char name_assign_type,
2149                                       enum nl80211_iftype type, u32 *flags,
2150                                       struct vif_params *params)
2151{
2152        struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
2153        struct brcmf_if *ifp = netdev_priv(cfg_to_ndev(cfg));
2154        struct brcmf_cfg80211_vif *vif;
2155        enum brcmf_fil_p2p_if_types iftype;
2156        int err;
2157
2158        if (brcmf_cfg80211_vif_event_armed(cfg))
2159                return ERR_PTR(-EBUSY);
2160
2161        brcmf_dbg(INFO, "adding vif \"%s\" (type=%d)\n", name, type);
2162
2163        switch (type) {
2164        case NL80211_IFTYPE_P2P_CLIENT:
2165                iftype = BRCMF_FIL_P2P_IF_CLIENT;
2166                break;
2167        case NL80211_IFTYPE_P2P_GO:
2168                iftype = BRCMF_FIL_P2P_IF_GO;
2169                break;
2170        case NL80211_IFTYPE_P2P_DEVICE:
2171                return brcmf_p2p_create_p2pdev(&cfg->p2p, wiphy,
2172                                               params->macaddr);
2173        default:
2174                return ERR_PTR(-EOPNOTSUPP);
2175        }
2176
2177        vif = brcmf_alloc_vif(cfg, type);
2178        if (IS_ERR(vif))
2179                return (struct wireless_dev *)vif;
2180        brcmf_cfg80211_arm_vif_event(cfg, vif);
2181
2182        err = brcmf_p2p_request_p2p_if(&cfg->p2p, ifp, cfg->p2p.int_addr,
2183                                       iftype);
2184        if (err) {
2185                brcmf_cfg80211_arm_vif_event(cfg, NULL);
2186                goto fail;
2187        }
2188
2189        /* wait for firmware event */
2190        err = brcmf_cfg80211_wait_vif_event(cfg, BRCMF_E_IF_ADD,
2191                                            BRCMF_VIF_EVENT_TIMEOUT);
2192        brcmf_cfg80211_arm_vif_event(cfg, NULL);
2193        if (!err) {
2194                brcmf_err("timeout occurred\n");
2195                err = -EIO;
2196                goto fail;
2197        }
2198
2199        /* interface created in firmware */
2200        ifp = vif->ifp;
2201        if (!ifp) {
2202                brcmf_err("no if pointer provided\n");
2203                err = -ENOENT;
2204                goto fail;
2205        }
2206
2207        strncpy(ifp->ndev->name, name, sizeof(ifp->ndev->name) - 1);
2208        ifp->ndev->name_assign_type = name_assign_type;
2209        err = brcmf_net_attach(ifp, true);
2210        if (err) {
2211                brcmf_err("Registering netdevice failed\n");
2212                goto fail;
2213        }
2214
2215        cfg->p2p.bss_idx[P2PAPI_BSSCFG_CONNECTION].vif = vif;
2216        /* Disable firmware roaming for P2P interface  */
2217        brcmf_fil_iovar_int_set(ifp, "roam_off", 1);
2218        if (iftype == BRCMF_FIL_P2P_IF_GO) {
2219                /* set station timeout for p2p */
2220                brcmf_fil_cmd_int_set(ifp, BRCMF_C_SET_SCB_TIMEOUT,
2221                                      BRCMF_SCB_TIMEOUT_VALUE);
2222        }
2223        return &ifp->vif->wdev;
2224
2225fail:
2226        brcmf_free_vif(vif);
2227        return ERR_PTR(err);
2228}
2229
2230/**
2231 * brcmf_p2p_del_vif() - delete a P2P virtual interface.
2232 *
2233 * @wiphy: wiphy device of interface.
2234 * @wdev: wireless device of interface.
2235 */
2236int brcmf_p2p_del_vif(struct wiphy *wiphy, struct wireless_dev *wdev)
2237{
2238        struct brcmf_cfg80211_info *cfg = wiphy_priv(wiphy);
2239        struct brcmf_p2p_info *p2p = &cfg->p2p;
2240        struct brcmf_cfg80211_vif *vif;
2241        enum nl80211_iftype iftype;
2242        bool wait_for_disable = false;
2243        int err;
2244
2245        brcmf_dbg(TRACE, "delete P2P vif\n");
2246        vif = container_of(wdev, struct brcmf_cfg80211_vif, wdev);
2247
2248        iftype = vif->wdev.iftype;
2249        brcmf_cfg80211_arm_vif_event(cfg, vif);
2250        switch (iftype) {
2251        case NL80211_IFTYPE_P2P_CLIENT:
2252                if (test_bit(BRCMF_VIF_STATUS_DISCONNECTING, &vif->sme_state))
2253                        wait_for_disable = true;
2254                break;
2255
2256        case NL80211_IFTYPE_P2P_GO:
2257                if (!brcmf_p2p_disable_p2p_if(vif))
2258                        wait_for_disable = true;
2259                break;
2260
2261        case NL80211_IFTYPE_P2P_DEVICE:
2262                if (!p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif)
2263                        return 0;
2264                brcmf_p2p_cancel_remain_on_channel(vif->ifp);
2265                brcmf_p2p_deinit_discovery(p2p);
2266                break;
2267
2268        default:
2269                return -ENOTSUPP;
2270        }
2271
2272        clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status);
2273        brcmf_dbg(INFO, "P2P: GO_NEG_PHASE status cleared\n");
2274
2275        if (wait_for_disable)
2276                wait_for_completion_timeout(&cfg->vif_disabled,
2277                                            BRCMF_P2P_DISABLE_TIMEOUT);
2278
2279        err = 0;
2280        if (iftype != NL80211_IFTYPE_P2P_DEVICE) {
2281                brcmf_vif_clear_mgmt_ies(vif);
2282                err = brcmf_p2p_release_p2p_if(vif);
2283        }
2284        if (!err) {
2285                /* wait for firmware event */
2286                err = brcmf_cfg80211_wait_vif_event(cfg, BRCMF_E_IF_DEL,
2287                                                    BRCMF_VIF_EVENT_TIMEOUT);
2288                if (!err)
2289                        err = -EIO;
2290                else
2291                        err = 0;
2292        }
2293        brcmf_remove_interface(vif->ifp, true);
2294
2295        brcmf_cfg80211_arm_vif_event(cfg, NULL);
2296        if (iftype != NL80211_IFTYPE_P2P_DEVICE)
2297                p2p->bss_idx[P2PAPI_BSSCFG_CONNECTION].vif = NULL;
2298
2299        return err;
2300}
2301
2302void brcmf_p2p_ifp_removed(struct brcmf_if *ifp, bool rtnl_locked)
2303{
2304        struct brcmf_cfg80211_info *cfg;
2305        struct brcmf_cfg80211_vif *vif;
2306
2307        brcmf_dbg(INFO, "P2P: device interface removed\n");
2308        vif = ifp->vif;
2309        cfg = wdev_to_cfg(&vif->wdev);
2310        cfg->p2p.bss_idx[P2PAPI_BSSCFG_DEVICE].vif = NULL;
2311        if (!rtnl_locked)
2312                rtnl_lock();
2313        cfg80211_unregister_wdev(&vif->wdev);
2314        if (!rtnl_locked)
2315                rtnl_unlock();
2316        brcmf_free_vif(vif);
2317}
2318
2319int brcmf_p2p_start_device(struct wiphy *wiphy, struct wireless_dev *wdev)
2320{
2321        struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
2322        struct brcmf_p2p_info *p2p = &cfg->p2p;
2323        struct brcmf_cfg80211_vif *vif;
2324        int err;
2325
2326        vif = container_of(wdev, struct brcmf_cfg80211_vif, wdev);
2327        mutex_lock(&cfg->usr_sync);
2328        err = brcmf_p2p_enable_discovery(p2p);
2329        if (!err)
2330                set_bit(BRCMF_VIF_STATUS_READY, &vif->sme_state);
2331        mutex_unlock(&cfg->usr_sync);
2332        return err;
2333}
2334
2335void brcmf_p2p_stop_device(struct wiphy *wiphy, struct wireless_dev *wdev)
2336{
2337        struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
2338        struct brcmf_p2p_info *p2p = &cfg->p2p;
2339        struct brcmf_cfg80211_vif *vif;
2340
2341        vif = container_of(wdev, struct brcmf_cfg80211_vif, wdev);
2342        /* This call can be result of the unregister_wdev call. In that case
2343         * we dont want to do anything anymore. Just return. The config vif
2344         * will have been cleared at this point.
2345         */
2346        if (p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif == vif) {
2347                mutex_lock(&cfg->usr_sync);
2348                /* Set the discovery state to SCAN */
2349                (void)brcmf_p2p_set_discover_state(vif->ifp,
2350                                                   WL_P2P_DISC_ST_SCAN, 0, 0);
2351                brcmf_abort_scanning(cfg);
2352                clear_bit(BRCMF_VIF_STATUS_READY, &vif->sme_state);
2353                mutex_unlock(&cfg->usr_sync);
2354        }
2355}
2356
2357/**
2358 * brcmf_p2p_attach() - attach for P2P.
2359 *
2360 * @cfg: driver private data for cfg80211 interface.
2361 * @p2pdev_forced: create p2p device interface at attach.
2362 */
2363s32 brcmf_p2p_attach(struct brcmf_cfg80211_info *cfg, bool p2pdev_forced)
2364{
2365        struct brcmf_p2p_info *p2p;
2366        struct brcmf_if *pri_ifp;
2367        s32 err = 0;
2368        void *err_ptr;
2369
2370        p2p = &cfg->p2p;
2371        p2p->cfg = cfg;
2372
2373        pri_ifp = brcmf_get_ifp(cfg->pub, 0);
2374        p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif = pri_ifp->vif;
2375
2376        if (p2pdev_forced) {
2377                err_ptr = brcmf_p2p_create_p2pdev(p2p, NULL, NULL);
2378                if (IS_ERR(err_ptr)) {
2379                        brcmf_err("P2P device creation failed.\n");
2380                        err = PTR_ERR(err_ptr);
2381                }
2382        } else {
2383                p2p->p2pdev_dynamically = true;
2384        }
2385        return err;
2386}
2387
2388/**
2389 * brcmf_p2p_detach() - detach P2P.
2390 *
2391 * @p2p: P2P specific data.
2392 */
2393void brcmf_p2p_detach(struct brcmf_p2p_info *p2p)
2394{
2395        struct brcmf_cfg80211_vif *vif;
2396
2397        vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif;
2398        if (vif != NULL) {
2399                brcmf_p2p_cancel_remain_on_channel(vif->ifp);
2400                brcmf_p2p_deinit_discovery(p2p);
2401                brcmf_remove_interface(vif->ifp, false);
2402        }
2403        /* just set it all to zero */
2404        memset(p2p, 0, sizeof(*p2p));
2405}
2406
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