1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * NXP Wireless LAN device driver: utility functions
4 *
5 * Copyright 2011-2020 NXP
6 */
7
8 #include "decl.h"
9 #include "ioctl.h"
10 #include "util.h"
11 #include "fw.h"
12 #include "main.h"
13 #include "wmm.h"
14 #include "11n.h"
15
16 static struct mwifiex_debug_data items[] = {
17 {"debug_mask", item_size(debug_mask),
18 item_addr(debug_mask), 1},
19 {"int_counter", item_size(int_counter),
20 item_addr(int_counter), 1},
21 {"wmm_ac_vo", item_size(packets_out[WMM_AC_VO]),
22 item_addr(packets_out[WMM_AC_VO]), 1},
23 {"wmm_ac_vi", item_size(packets_out[WMM_AC_VI]),
24 item_addr(packets_out[WMM_AC_VI]), 1},
25 {"wmm_ac_be", item_size(packets_out[WMM_AC_BE]),
26 item_addr(packets_out[WMM_AC_BE]), 1},
27 {"wmm_ac_bk", item_size(packets_out[WMM_AC_BK]),
28 item_addr(packets_out[WMM_AC_BK]), 1},
29 {"tx_buf_size", item_size(tx_buf_size),
30 item_addr(tx_buf_size), 1},
31 {"curr_tx_buf_size", item_size(curr_tx_buf_size),
32 item_addr(curr_tx_buf_size), 1},
33 {"ps_mode", item_size(ps_mode),
34 item_addr(ps_mode), 1},
35 {"ps_state", item_size(ps_state),
36 item_addr(ps_state), 1},
37 {"is_deep_sleep", item_size(is_deep_sleep),
38 item_addr(is_deep_sleep), 1},
39 {"wakeup_dev_req", item_size(pm_wakeup_card_req),
40 item_addr(pm_wakeup_card_req), 1},
41 {"wakeup_tries", item_size(pm_wakeup_fw_try),
42 item_addr(pm_wakeup_fw_try), 1},
43 {"hs_configured", item_size(is_hs_configured),
44 item_addr(is_hs_configured), 1},
45 {"hs_activated", item_size(hs_activated),
46 item_addr(hs_activated), 1},
47 {"num_tx_timeout", item_size(num_tx_timeout),
48 item_addr(num_tx_timeout), 1},
49 {"is_cmd_timedout", item_size(is_cmd_timedout),
50 item_addr(is_cmd_timedout), 1},
51 {"timeout_cmd_id", item_size(timeout_cmd_id),
52 item_addr(timeout_cmd_id), 1},
53 {"timeout_cmd_act", item_size(timeout_cmd_act),
54 item_addr(timeout_cmd_act), 1},
55 {"last_cmd_id", item_size(last_cmd_id),
56 item_addr(last_cmd_id), DBG_CMD_NUM},
57 {"last_cmd_act", item_size(last_cmd_act),
58 item_addr(last_cmd_act), DBG_CMD_NUM},
59 {"last_cmd_index", item_size(last_cmd_index),
60 item_addr(last_cmd_index), 1},
61 {"last_cmd_resp_id", item_size(last_cmd_resp_id),
62 item_addr(last_cmd_resp_id), DBG_CMD_NUM},
63 {"last_cmd_resp_index", item_size(last_cmd_resp_index),
64 item_addr(last_cmd_resp_index), 1},
65 {"last_event", item_size(last_event),
66 item_addr(last_event), DBG_CMD_NUM},
67 {"last_event_index", item_size(last_event_index),
68 item_addr(last_event_index), 1},
69 {"last_mp_wr_bitmap", item_size(last_mp_wr_bitmap),
70 item_addr(last_mp_wr_bitmap), MWIFIEX_DBG_SDIO_MP_NUM},
71 {"last_mp_wr_ports", item_size(last_mp_wr_ports),
72 item_addr(last_mp_wr_ports), MWIFIEX_DBG_SDIO_MP_NUM},
73 {"last_mp_wr_len", item_size(last_mp_wr_len),
74 item_addr(last_mp_wr_len), MWIFIEX_DBG_SDIO_MP_NUM},
75 {"last_mp_curr_wr_port", item_size(last_mp_curr_wr_port),
76 item_addr(last_mp_curr_wr_port), MWIFIEX_DBG_SDIO_MP_NUM},
77 {"last_sdio_mp_index", item_size(last_sdio_mp_index),
78 item_addr(last_sdio_mp_index), 1},
79 {"num_cmd_h2c_fail", item_size(num_cmd_host_to_card_failure),
80 item_addr(num_cmd_host_to_card_failure), 1},
81 {"num_cmd_sleep_cfm_fail",
82 item_size(num_cmd_sleep_cfm_host_to_card_failure),
83 item_addr(num_cmd_sleep_cfm_host_to_card_failure), 1},
84 {"num_tx_h2c_fail", item_size(num_tx_host_to_card_failure),
85 item_addr(num_tx_host_to_card_failure), 1},
86 {"num_evt_deauth", item_size(num_event_deauth),
87 item_addr(num_event_deauth), 1},
88 {"num_evt_disassoc", item_size(num_event_disassoc),
89 item_addr(num_event_disassoc), 1},
90 {"num_evt_link_lost", item_size(num_event_link_lost),
91 item_addr(num_event_link_lost), 1},
92 {"num_cmd_deauth", item_size(num_cmd_deauth),
93 item_addr(num_cmd_deauth), 1},
94 {"num_cmd_assoc_ok", item_size(num_cmd_assoc_success),
95 item_addr(num_cmd_assoc_success), 1},
96 {"num_cmd_assoc_fail", item_size(num_cmd_assoc_failure),
97 item_addr(num_cmd_assoc_failure), 1},
98 {"cmd_sent", item_size(cmd_sent),
99 item_addr(cmd_sent), 1},
100 {"data_sent", item_size(data_sent),
101 item_addr(data_sent), 1},
102 {"cmd_resp_received", item_size(cmd_resp_received),
103 item_addr(cmd_resp_received), 1},
104 {"event_received", item_size(event_received),
105 item_addr(event_received), 1},
106
107 /* variables defined in struct mwifiex_adapter */
108 {"cmd_pending", adapter_item_size(cmd_pending),
109 adapter_item_addr(cmd_pending), 1},
110 {"tx_pending", adapter_item_size(tx_pending),
111 adapter_item_addr(tx_pending), 1},
112 {"rx_pending", adapter_item_size(rx_pending),
113 adapter_item_addr(rx_pending), 1},
114 };
115
116 static int num_of_items = ARRAY_SIZE(items);
117
118 /*
119 * This function sends init/shutdown command
120 * to firmware.
121 */
mwifiex_init_shutdown_fw(struct mwifiex_private * priv,u32 func_init_shutdown)122 int mwifiex_init_shutdown_fw(struct mwifiex_private *priv,
123 u32 func_init_shutdown)
124 {
125 u16 cmd;
126
127 if (func_init_shutdown == MWIFIEX_FUNC_INIT) {
128 cmd = HostCmd_CMD_FUNC_INIT;
129 } else if (func_init_shutdown == MWIFIEX_FUNC_SHUTDOWN) {
130 cmd = HostCmd_CMD_FUNC_SHUTDOWN;
131 } else {
132 mwifiex_dbg(priv->adapter, ERROR,
133 "unsupported parameter\n");
134 return -1;
135 }
136
137 return mwifiex_send_cmd(priv, cmd, HostCmd_ACT_GEN_SET, 0, NULL, true);
138 }
139 EXPORT_SYMBOL_GPL(mwifiex_init_shutdown_fw);
140
141 /*
142 * IOCTL request handler to set/get debug information.
143 *
144 * This function collates/sets the information from/to different driver
145 * structures.
146 */
mwifiex_get_debug_info(struct mwifiex_private * priv,struct mwifiex_debug_info * info)147 int mwifiex_get_debug_info(struct mwifiex_private *priv,
148 struct mwifiex_debug_info *info)
149 {
150 struct mwifiex_adapter *adapter = priv->adapter;
151
152 if (info) {
153 info->debug_mask = adapter->debug_mask;
154 memcpy(info->packets_out,
155 priv->wmm.packets_out,
156 sizeof(priv->wmm.packets_out));
157 info->curr_tx_buf_size = (u32) adapter->curr_tx_buf_size;
158 info->tx_buf_size = (u32) adapter->tx_buf_size;
159 info->rx_tbl_num = mwifiex_get_rx_reorder_tbl(priv,
160 info->rx_tbl);
161 info->tx_tbl_num = mwifiex_get_tx_ba_stream_tbl(priv,
162 info->tx_tbl);
163 info->tdls_peer_num = mwifiex_get_tdls_list(priv,
164 info->tdls_list);
165 info->ps_mode = adapter->ps_mode;
166 info->ps_state = adapter->ps_state;
167 info->is_deep_sleep = adapter->is_deep_sleep;
168 info->pm_wakeup_card_req = adapter->pm_wakeup_card_req;
169 info->pm_wakeup_fw_try = adapter->pm_wakeup_fw_try;
170 info->is_hs_configured = test_bit(MWIFIEX_IS_HS_CONFIGURED,
171 &adapter->work_flags);
172 info->hs_activated = adapter->hs_activated;
173 info->is_cmd_timedout = test_bit(MWIFIEX_IS_CMD_TIMEDOUT,
174 &adapter->work_flags);
175 info->num_cmd_host_to_card_failure
176 = adapter->dbg.num_cmd_host_to_card_failure;
177 info->num_cmd_sleep_cfm_host_to_card_failure
178 = adapter->dbg.num_cmd_sleep_cfm_host_to_card_failure;
179 info->num_tx_host_to_card_failure
180 = adapter->dbg.num_tx_host_to_card_failure;
181 info->num_event_deauth = adapter->dbg.num_event_deauth;
182 info->num_event_disassoc = adapter->dbg.num_event_disassoc;
183 info->num_event_link_lost = adapter->dbg.num_event_link_lost;
184 info->num_cmd_deauth = adapter->dbg.num_cmd_deauth;
185 info->num_cmd_assoc_success =
186 adapter->dbg.num_cmd_assoc_success;
187 info->num_cmd_assoc_failure =
188 adapter->dbg.num_cmd_assoc_failure;
189 info->num_tx_timeout = adapter->dbg.num_tx_timeout;
190 info->timeout_cmd_id = adapter->dbg.timeout_cmd_id;
191 info->timeout_cmd_act = adapter->dbg.timeout_cmd_act;
192 memcpy(info->last_cmd_id, adapter->dbg.last_cmd_id,
193 sizeof(adapter->dbg.last_cmd_id));
194 memcpy(info->last_cmd_act, adapter->dbg.last_cmd_act,
195 sizeof(adapter->dbg.last_cmd_act));
196 info->last_cmd_index = adapter->dbg.last_cmd_index;
197 memcpy(info->last_cmd_resp_id, adapter->dbg.last_cmd_resp_id,
198 sizeof(adapter->dbg.last_cmd_resp_id));
199 info->last_cmd_resp_index = adapter->dbg.last_cmd_resp_index;
200 memcpy(info->last_event, adapter->dbg.last_event,
201 sizeof(adapter->dbg.last_event));
202 info->last_event_index = adapter->dbg.last_event_index;
203 memcpy(info->last_mp_wr_bitmap, adapter->dbg.last_mp_wr_bitmap,
204 sizeof(adapter->dbg.last_mp_wr_bitmap));
205 memcpy(info->last_mp_wr_ports, adapter->dbg.last_mp_wr_ports,
206 sizeof(adapter->dbg.last_mp_wr_ports));
207 memcpy(info->last_mp_curr_wr_port,
208 adapter->dbg.last_mp_curr_wr_port,
209 sizeof(adapter->dbg.last_mp_curr_wr_port));
210 memcpy(info->last_mp_wr_len, adapter->dbg.last_mp_wr_len,
211 sizeof(adapter->dbg.last_mp_wr_len));
212 info->last_sdio_mp_index = adapter->dbg.last_sdio_mp_index;
213 info->data_sent = adapter->data_sent;
214 info->cmd_sent = adapter->cmd_sent;
215 info->cmd_resp_received = adapter->cmd_resp_received;
216 }
217
218 return 0;
219 }
220
mwifiex_debug_info_to_buffer(struct mwifiex_private * priv,char * buf,struct mwifiex_debug_info * info)221 int mwifiex_debug_info_to_buffer(struct mwifiex_private *priv, char *buf,
222 struct mwifiex_debug_info *info)
223 {
224 char *p = buf;
225 struct mwifiex_debug_data *d = &items[0];
226 size_t size, addr;
227 long val;
228 int i, j;
229
230 if (!info)
231 return 0;
232
233 for (i = 0; i < num_of_items; i++) {
234 p += sprintf(p, "%s=", d[i].name);
235
236 size = d[i].size / d[i].num;
237
238 if (i < (num_of_items - 3))
239 addr = d[i].addr + (size_t)info;
240 else /* The last 3 items are struct mwifiex_adapter variables */
241 addr = d[i].addr + (size_t)priv->adapter;
242
243 for (j = 0; j < d[i].num; j++) {
244 switch (size) {
245 case 1:
246 val = *((u8 *)addr);
247 break;
248 case 2:
249 val = get_unaligned((u16 *)addr);
250 break;
251 case 4:
252 val = get_unaligned((u32 *)addr);
253 break;
254 case 8:
255 val = get_unaligned((long long *)addr);
256 break;
257 default:
258 val = -1;
259 break;
260 }
261
262 p += sprintf(p, "%#lx ", val);
263 addr += size;
264 }
265
266 p += sprintf(p, "\n");
267 }
268
269 if (info->tx_tbl_num) {
270 p += sprintf(p, "Tx BA stream table:\n");
271 for (i = 0; i < info->tx_tbl_num; i++)
272 p += sprintf(p, "tid = %d, ra = %pM\n",
273 info->tx_tbl[i].tid, info->tx_tbl[i].ra);
274 }
275
276 if (info->rx_tbl_num) {
277 p += sprintf(p, "Rx reorder table:\n");
278 for (i = 0; i < info->rx_tbl_num; i++) {
279 p += sprintf(p, "tid = %d, ta = %pM, ",
280 info->rx_tbl[i].tid,
281 info->rx_tbl[i].ta);
282 p += sprintf(p, "start_win = %d, ",
283 info->rx_tbl[i].start_win);
284 p += sprintf(p, "win_size = %d, buffer: ",
285 info->rx_tbl[i].win_size);
286
287 for (j = 0; j < info->rx_tbl[i].win_size; j++)
288 p += sprintf(p, "%c ",
289 info->rx_tbl[i].buffer[j] ?
290 '1' : '0');
291
292 p += sprintf(p, "\n");
293 }
294 }
295
296 if (info->tdls_peer_num) {
297 p += sprintf(p, "TDLS peer table:\n");
298 for (i = 0; i < info->tdls_peer_num; i++) {
299 p += sprintf(p, "peer = %pM",
300 info->tdls_list[i].peer_addr);
301 p += sprintf(p, "\n");
302 }
303 }
304
305 return p - buf;
306 }
307
308 static int
mwifiex_parse_mgmt_packet(struct mwifiex_private * priv,u8 * payload,u16 len,struct rxpd * rx_pd)309 mwifiex_parse_mgmt_packet(struct mwifiex_private *priv, u8 *payload, u16 len,
310 struct rxpd *rx_pd)
311 {
312 u16 stype;
313 u8 category, action_code, *addr2;
314 struct ieee80211_hdr *ieee_hdr = (void *)payload;
315
316 stype = (le16_to_cpu(ieee_hdr->frame_control) & IEEE80211_FCTL_STYPE);
317
318 switch (stype) {
319 case IEEE80211_STYPE_ACTION:
320 category = *(payload + sizeof(struct ieee80211_hdr));
321 switch (category) {
322 case WLAN_CATEGORY_PUBLIC:
323 action_code = *(payload + sizeof(struct ieee80211_hdr)
324 + 1);
325 if (action_code == WLAN_PUB_ACTION_TDLS_DISCOVER_RES) {
326 addr2 = ieee_hdr->addr2;
327 mwifiex_dbg(priv->adapter, INFO,
328 "TDLS discovery response %pM nf=%d, snr=%d\n",
329 addr2, rx_pd->nf, rx_pd->snr);
330 mwifiex_auto_tdls_update_peer_signal(priv,
331 addr2,
332 rx_pd->snr,
333 rx_pd->nf);
334 }
335 break;
336 case WLAN_CATEGORY_BACK:
337 /*we dont indicate BACK action frames to cfg80211*/
338 mwifiex_dbg(priv->adapter, INFO,
339 "drop BACK action frames");
340 return -1;
341 default:
342 mwifiex_dbg(priv->adapter, INFO,
343 "unknown public action frame category %d\n",
344 category);
345 }
346 break;
347 default:
348 mwifiex_dbg(priv->adapter, INFO,
349 "unknown mgmt frame subtype %#x\n", stype);
350 return 0;
351 }
352
353 return 0;
354 }
355
356 /* This function sends deauth packet to the kernel. */
mwifiex_host_mlme_disconnect(struct mwifiex_private * priv,u16 reason_code,u8 * sa)357 void mwifiex_host_mlme_disconnect(struct mwifiex_private *priv,
358 u16 reason_code, u8 *sa)
359 {
360 u8 frame_buf[100];
361 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)frame_buf;
362
363 memset(frame_buf, 0, sizeof(frame_buf));
364 mgmt->frame_control = cpu_to_le16(IEEE80211_STYPE_DEAUTH);
365 mgmt->duration = 0;
366 mgmt->seq_ctrl = 0;
367 mgmt->u.deauth.reason_code = cpu_to_le16(reason_code);
368
369 if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA) {
370 eth_broadcast_addr(mgmt->da);
371 memcpy(mgmt->sa,
372 priv->curr_bss_params.bss_descriptor.mac_address,
373 ETH_ALEN);
374 memcpy(mgmt->bssid, priv->cfg_bssid, ETH_ALEN);
375 priv->auth_flag = 0;
376 priv->auth_alg = WLAN_AUTH_NONE;
377 } else {
378 memcpy(mgmt->da, priv->curr_addr, ETH_ALEN);
379 memcpy(mgmt->sa, sa, ETH_ALEN);
380 memcpy(mgmt->bssid, priv->curr_addr, ETH_ALEN);
381 }
382
383 if (GET_BSS_ROLE(priv) != MWIFIEX_BSS_ROLE_UAP) {
384 wiphy_lock(priv->wdev.wiphy);
385 cfg80211_rx_mlme_mgmt(priv->netdev, frame_buf, 26);
386 wiphy_unlock(priv->wdev.wiphy);
387 } else {
388 cfg80211_rx_mgmt(&priv->wdev,
389 priv->bss_chandef.chan->center_freq,
390 0, frame_buf, 26, 0);
391 }
392 }
393
394 /*
395 * This function processes the received management packet and send it
396 * to the kernel.
397 */
398 int
mwifiex_process_mgmt_packet(struct mwifiex_private * priv,struct sk_buff * skb)399 mwifiex_process_mgmt_packet(struct mwifiex_private *priv,
400 struct sk_buff *skb)
401 {
402 struct rxpd *rx_pd;
403 u16 pkt_len;
404 struct ieee80211_hdr *ieee_hdr;
405
406 if (!skb)
407 return -1;
408
409 if (!priv->mgmt_frame_mask ||
410 priv->wdev.iftype == NL80211_IFTYPE_UNSPECIFIED) {
411 mwifiex_dbg(priv->adapter, ERROR,
412 "do not receive mgmt frames on uninitialized intf");
413 return -1;
414 }
415
416 rx_pd = (struct rxpd *)skb->data;
417 pkt_len = le16_to_cpu(rx_pd->rx_pkt_length);
418 if (pkt_len < sizeof(struct ieee80211_hdr) + sizeof(pkt_len)) {
419 mwifiex_dbg(priv->adapter, ERROR, "invalid rx_pkt_length");
420 return -1;
421 }
422
423 skb_pull(skb, le16_to_cpu(rx_pd->rx_pkt_offset));
424 skb_pull(skb, sizeof(pkt_len));
425 pkt_len -= sizeof(pkt_len);
426
427 ieee_hdr = (void *)skb->data;
428 if (ieee80211_is_mgmt(ieee_hdr->frame_control)) {
429 if (mwifiex_parse_mgmt_packet(priv, (u8 *)ieee_hdr,
430 pkt_len, rx_pd))
431 return -1;
432 }
433 /* Remove address4 */
434 memmove(skb->data + sizeof(struct ieee80211_hdr_3addr),
435 skb->data + sizeof(struct ieee80211_hdr),
436 pkt_len - sizeof(struct ieee80211_hdr));
437
438 pkt_len -= ETH_ALEN;
439 rx_pd->rx_pkt_length = cpu_to_le16(pkt_len);
440
441 if (priv->host_mlme_reg &&
442 (GET_BSS_ROLE(priv) != MWIFIEX_BSS_ROLE_UAP) &&
443 (ieee80211_is_auth(ieee_hdr->frame_control) ||
444 ieee80211_is_deauth(ieee_hdr->frame_control) ||
445 ieee80211_is_disassoc(ieee_hdr->frame_control))) {
446 if (ieee80211_is_auth(ieee_hdr->frame_control)) {
447 if (priv->auth_flag & HOST_MLME_AUTH_PENDING) {
448 if (priv->auth_alg != WLAN_AUTH_SAE) {
449 priv->auth_flag &=
450 ~HOST_MLME_AUTH_PENDING;
451 priv->auth_flag |=
452 HOST_MLME_AUTH_DONE;
453 }
454 } else {
455 return 0;
456 }
457
458 mwifiex_dbg(priv->adapter, MSG,
459 "auth: receive authentication from %pM\n",
460 ieee_hdr->addr3);
461 } else {
462 if (!priv->wdev.connected ||
463 !ether_addr_equal(ieee_hdr->addr3,
464 priv->curr_bss_params.bss_descriptor.mac_address))
465 return 0;
466
467 if (ieee80211_is_deauth(ieee_hdr->frame_control)) {
468 mwifiex_dbg(priv->adapter, MSG,
469 "auth: receive deauth from %pM\n",
470 ieee_hdr->addr3);
471 priv->auth_flag = 0;
472 priv->auth_alg = WLAN_AUTH_NONE;
473 } else {
474 mwifiex_dbg
475 (priv->adapter, MSG,
476 "assoc: receive disassoc from %pM\n",
477 ieee_hdr->addr3);
478 }
479 }
480
481 wiphy_lock(priv->wdev.wiphy);
482 cfg80211_rx_mlme_mgmt(priv->netdev, skb->data, pkt_len);
483 wiphy_unlock(priv->wdev.wiphy);
484 }
485
486 if (priv->adapter->host_mlme_enabled &&
487 (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_UAP)) {
488 if (ieee80211_is_auth(ieee_hdr->frame_control))
489 mwifiex_dbg(priv->adapter, MSG,
490 "auth: receive auth from %pM\n",
491 ieee_hdr->addr2);
492 if (ieee80211_is_deauth(ieee_hdr->frame_control))
493 mwifiex_dbg(priv->adapter, MSG,
494 "auth: receive deauth from %pM\n",
495 ieee_hdr->addr2);
496 if (ieee80211_is_disassoc(ieee_hdr->frame_control))
497 mwifiex_dbg(priv->adapter, MSG,
498 "assoc: receive disassoc from %pM\n",
499 ieee_hdr->addr2);
500 if (ieee80211_is_assoc_req(ieee_hdr->frame_control))
501 mwifiex_dbg(priv->adapter, MSG,
502 "assoc: receive assoc req from %pM\n",
503 ieee_hdr->addr2);
504 if (ieee80211_is_reassoc_req(ieee_hdr->frame_control))
505 mwifiex_dbg(priv->adapter, MSG,
506 "assoc: receive reassoc req from %pM\n",
507 ieee_hdr->addr2);
508 }
509
510 cfg80211_rx_mgmt(&priv->wdev, priv->roc_cfg.chan.center_freq,
511 CAL_RSSI(rx_pd->snr, rx_pd->nf), skb->data, pkt_len,
512 0);
513
514 return 0;
515 }
516
517 /*
518 * This function processes the received packet before sending it to the
519 * kernel.
520 *
521 * It extracts the SKB from the received buffer and sends it to kernel.
522 * In case the received buffer does not contain the data in SKB format,
523 * the function creates a blank SKB, fills it with the data from the
524 * received buffer and then sends this new SKB to the kernel.
525 */
mwifiex_recv_packet(struct mwifiex_private * priv,struct sk_buff * skb)526 int mwifiex_recv_packet(struct mwifiex_private *priv, struct sk_buff *skb)
527 {
528 struct mwifiex_sta_node *src_node;
529 struct ethhdr *p_ethhdr;
530
531 if (!skb)
532 return -1;
533
534 priv->stats.rx_bytes += skb->len;
535 priv->stats.rx_packets++;
536
537 if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_UAP) {
538 p_ethhdr = (void *)skb->data;
539 src_node = mwifiex_get_sta_entry(priv, p_ethhdr->h_source);
540 if (src_node) {
541 src_node->stats.last_rx = jiffies;
542 src_node->stats.rx_bytes += skb->len;
543 src_node->stats.rx_packets++;
544 }
545 }
546
547 skb->dev = priv->netdev;
548 skb->protocol = eth_type_trans(skb, priv->netdev);
549 skb->ip_summed = CHECKSUM_NONE;
550
551 /* This is required only in case of 11n and USB/PCIE as we alloc
552 * a buffer of 4K only if its 11N (to be able to receive 4K
553 * AMSDU packets). In case of SD we allocate buffers based
554 * on the size of packet and hence this is not needed.
555 *
556 * Modifying the truesize here as our allocation for each
557 * skb is 4K but we only receive 2K packets and this cause
558 * the kernel to start dropping packets in case where
559 * application has allocated buffer based on 2K size i.e.
560 * if there a 64K packet received (in IP fragments and
561 * application allocates 64K to receive this packet but
562 * this packet would almost double up because we allocate
563 * each 1.5K fragment in 4K and pass it up. As soon as the
564 * 64K limit hits kernel will start to drop rest of the
565 * fragments. Currently we fail the Filesndl-ht.scr script
566 * for UDP, hence this fix
567 */
568 if ((priv->adapter->iface_type == MWIFIEX_USB ||
569 priv->adapter->iface_type == MWIFIEX_PCIE) &&
570 (skb->truesize > MWIFIEX_RX_DATA_BUF_SIZE))
571 skb->truesize += (skb->len - MWIFIEX_RX_DATA_BUF_SIZE);
572
573 netif_rx(skb);
574 return 0;
575 }
576
577 /*
578 * IOCTL completion callback handler.
579 *
580 * This function is called when a pending IOCTL is completed.
581 *
582 * If work queue support is enabled, the function wakes up the
583 * corresponding waiting function. Otherwise, it processes the
584 * IOCTL response and frees the response buffer.
585 */
mwifiex_complete_cmd(struct mwifiex_adapter * adapter,struct cmd_ctrl_node * cmd_node)586 int mwifiex_complete_cmd(struct mwifiex_adapter *adapter,
587 struct cmd_ctrl_node *cmd_node)
588 {
589 WARN_ON(!cmd_node->wait_q_enabled);
590 mwifiex_dbg(adapter, CMD, "cmd completed: status=%d\n",
591 adapter->cmd_wait_q.status);
592
593 *cmd_node->condition = true;
594 wake_up_interruptible(&adapter->cmd_wait_q.wait);
595
596 return 0;
597 }
598
599 /* This function will return the pointer to station entry in station list
600 * table which matches specified mac address.
601 * This function should be called after acquiring RA list spinlock.
602 * NULL is returned if station entry is not found in associated STA list.
603 */
604 struct mwifiex_sta_node *
mwifiex_get_sta_entry(struct mwifiex_private * priv,const u8 * mac)605 mwifiex_get_sta_entry(struct mwifiex_private *priv, const u8 *mac)
606 {
607 struct mwifiex_sta_node *node;
608
609 if (!mac)
610 return NULL;
611
612 list_for_each_entry(node, &priv->sta_list, list) {
613 if (!memcmp(node->mac_addr, mac, ETH_ALEN))
614 return node;
615 }
616
617 return NULL;
618 }
619
620 static struct mwifiex_sta_node *
mwifiex_get_tdls_sta_entry(struct mwifiex_private * priv,u8 status)621 mwifiex_get_tdls_sta_entry(struct mwifiex_private *priv, u8 status)
622 {
623 struct mwifiex_sta_node *node;
624
625 list_for_each_entry(node, &priv->sta_list, list) {
626 if (node->tdls_status == status)
627 return node;
628 }
629
630 return NULL;
631 }
632
633 /* If tdls channel switching is on-going, tx data traffic should be
634 * blocked until the switching stage completed.
635 */
mwifiex_is_tdls_chan_switching(struct mwifiex_private * priv)636 u8 mwifiex_is_tdls_chan_switching(struct mwifiex_private *priv)
637 {
638 struct mwifiex_sta_node *sta_ptr;
639
640 if (!priv || !ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info))
641 return false;
642
643 sta_ptr = mwifiex_get_tdls_sta_entry(priv, TDLS_CHAN_SWITCHING);
644 if (sta_ptr)
645 return true;
646
647 return false;
648 }
649
mwifiex_is_tdls_off_chan(struct mwifiex_private * priv)650 static u8 mwifiex_is_tdls_off_chan(struct mwifiex_private *priv)
651 {
652 struct mwifiex_sta_node *sta_ptr;
653
654 if (!priv || !ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info))
655 return false;
656
657 sta_ptr = mwifiex_get_tdls_sta_entry(priv, TDLS_IN_OFF_CHAN);
658 if (sta_ptr)
659 return true;
660
661 return false;
662 }
663
664 /* If tdls channel switching is on-going or tdls operate on off-channel,
665 * cmd path should be blocked until tdls switched to base-channel.
666 */
mwifiex_is_send_cmd_allowed(struct mwifiex_private * priv)667 u8 mwifiex_is_send_cmd_allowed(struct mwifiex_private *priv)
668 {
669 if (!priv || !ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info))
670 return true;
671
672 if (mwifiex_is_tdls_chan_switching(priv) ||
673 mwifiex_is_tdls_off_chan(priv))
674 return false;
675
676 return true;
677 }
678
679 /* This function will add a sta_node entry to associated station list
680 * table with the given mac address.
681 * If entry exist already, existing entry is returned.
682 * If received mac address is NULL, NULL is returned.
683 */
684 struct mwifiex_sta_node *
mwifiex_add_sta_entry(struct mwifiex_private * priv,const u8 * mac)685 mwifiex_add_sta_entry(struct mwifiex_private *priv, const u8 *mac)
686 {
687 struct mwifiex_sta_node *node;
688
689 if (!mac)
690 return NULL;
691
692 spin_lock_bh(&priv->sta_list_spinlock);
693 node = mwifiex_get_sta_entry(priv, mac);
694 if (node)
695 goto done;
696
697 node = kzalloc(sizeof(*node), GFP_ATOMIC);
698 if (!node)
699 goto done;
700
701 memcpy(node->mac_addr, mac, ETH_ALEN);
702 list_add_tail(&node->list, &priv->sta_list);
703
704 done:
705 spin_unlock_bh(&priv->sta_list_spinlock);
706 return node;
707 }
708
709 /* This function will search for HT IE in association request IEs
710 * and set station HT parameters accordingly.
711 */
712 void
mwifiex_set_sta_ht_cap(struct mwifiex_private * priv,const u8 * ies,int ies_len,struct mwifiex_sta_node * node)713 mwifiex_set_sta_ht_cap(struct mwifiex_private *priv, const u8 *ies,
714 int ies_len, struct mwifiex_sta_node *node)
715 {
716 struct ieee_types_header *ht_cap_ie;
717 const struct ieee80211_ht_cap *ht_cap;
718
719 if (!ies)
720 return;
721
722 ht_cap_ie = (void *)cfg80211_find_ie(WLAN_EID_HT_CAPABILITY, ies,
723 ies_len);
724 if (ht_cap_ie) {
725 ht_cap = (void *)(ht_cap_ie + 1);
726 node->is_11n_enabled = 1;
727 node->max_amsdu = le16_to_cpu(ht_cap->cap_info) &
728 IEEE80211_HT_CAP_MAX_AMSDU ?
729 MWIFIEX_TX_DATA_BUF_SIZE_8K :
730 MWIFIEX_TX_DATA_BUF_SIZE_4K;
731 } else {
732 node->is_11n_enabled = 0;
733 }
734
735 return;
736 }
737
738 /* This function will delete a station entry from station list */
mwifiex_del_sta_entry(struct mwifiex_private * priv,const u8 * mac)739 void mwifiex_del_sta_entry(struct mwifiex_private *priv, const u8 *mac)
740 {
741 struct mwifiex_sta_node *node;
742
743 spin_lock_bh(&priv->sta_list_spinlock);
744
745 node = mwifiex_get_sta_entry(priv, mac);
746 if (node) {
747 list_del(&node->list);
748 kfree(node);
749 }
750
751 spin_unlock_bh(&priv->sta_list_spinlock);
752 return;
753 }
754
755 /* This function will delete all stations from associated station list. */
mwifiex_del_all_sta_list(struct mwifiex_private * priv)756 void mwifiex_del_all_sta_list(struct mwifiex_private *priv)
757 {
758 struct mwifiex_sta_node *node, *tmp;
759
760 spin_lock_bh(&priv->sta_list_spinlock);
761
762 list_for_each_entry_safe(node, tmp, &priv->sta_list, list) {
763 list_del(&node->list);
764 kfree(node);
765 }
766
767 INIT_LIST_HEAD(&priv->sta_list);
768 spin_unlock_bh(&priv->sta_list_spinlock);
769 return;
770 }
771
772 /* This function adds histogram data to histogram array*/
mwifiex_hist_data_add(struct mwifiex_private * priv,u8 rx_rate,s8 snr,s8 nflr)773 void mwifiex_hist_data_add(struct mwifiex_private *priv,
774 u8 rx_rate, s8 snr, s8 nflr)
775 {
776 struct mwifiex_histogram_data *phist_data = priv->hist_data;
777
778 if (atomic_read(&phist_data->num_samples) > MWIFIEX_HIST_MAX_SAMPLES)
779 mwifiex_hist_data_reset(priv);
780 mwifiex_hist_data_set(priv, rx_rate, snr, nflr);
781 }
782
783 /* function to add histogram record */
mwifiex_hist_data_set(struct mwifiex_private * priv,u8 rx_rate,s8 snr,s8 nflr)784 void mwifiex_hist_data_set(struct mwifiex_private *priv, u8 rx_rate, s8 snr,
785 s8 nflr)
786 {
787 struct mwifiex_histogram_data *phist_data = priv->hist_data;
788 s8 nf = -nflr;
789 s8 rssi = snr - nflr;
790
791 atomic_inc(&phist_data->num_samples);
792 atomic_inc(&phist_data->rx_rate[rx_rate]);
793 atomic_inc(&phist_data->snr[snr + 128]);
794 atomic_inc(&phist_data->noise_flr[nf + 128]);
795 atomic_inc(&phist_data->sig_str[rssi + 128]);
796 }
797
798 /* function to reset histogram data during init/reset */
mwifiex_hist_data_reset(struct mwifiex_private * priv)799 void mwifiex_hist_data_reset(struct mwifiex_private *priv)
800 {
801 int ix;
802 struct mwifiex_histogram_data *phist_data = priv->hist_data;
803
804 atomic_set(&phist_data->num_samples, 0);
805 for (ix = 0; ix < MWIFIEX_MAX_AC_RX_RATES; ix++)
806 atomic_set(&phist_data->rx_rate[ix], 0);
807 for (ix = 0; ix < MWIFIEX_MAX_SNR; ix++)
808 atomic_set(&phist_data->snr[ix], 0);
809 for (ix = 0; ix < MWIFIEX_MAX_NOISE_FLR; ix++)
810 atomic_set(&phist_data->noise_flr[ix], 0);
811 for (ix = 0; ix < MWIFIEX_MAX_SIG_STRENGTH; ix++)
812 atomic_set(&phist_data->sig_str[ix], 0);
813 }
814
mwifiex_alloc_dma_align_buf(int rx_len,gfp_t flags)815 void *mwifiex_alloc_dma_align_buf(int rx_len, gfp_t flags)
816 {
817 struct sk_buff *skb;
818 int buf_len, pad;
819
820 buf_len = rx_len + MWIFIEX_RX_HEADROOM + MWIFIEX_DMA_ALIGN_SZ;
821
822 skb = __dev_alloc_skb(buf_len, flags);
823
824 if (!skb)
825 return NULL;
826
827 skb_reserve(skb, MWIFIEX_RX_HEADROOM);
828
829 pad = MWIFIEX_ALIGN_ADDR(skb->data, MWIFIEX_DMA_ALIGN_SZ) -
830 (long)skb->data;
831
832 skb_reserve(skb, pad);
833
834 return skb;
835 }
836 EXPORT_SYMBOL_GPL(mwifiex_alloc_dma_align_buf);
837
mwifiex_fw_dump_event(struct mwifiex_private * priv)838 void mwifiex_fw_dump_event(struct mwifiex_private *priv)
839 {
840 mwifiex_send_cmd(priv, HostCmd_CMD_FW_DUMP_EVENT, HostCmd_ACT_GEN_SET,
841 0, NULL, true);
842 }
843 EXPORT_SYMBOL_GPL(mwifiex_fw_dump_event);
844