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 * Firmware initialization complete callback handler.
120 *
121 * This function wakes up the function waiting on the init
122 * wait queue for the firmware initialization to complete.
123 */
mwifiex_init_fw_complete(struct mwifiex_adapter * adapter)124 int mwifiex_init_fw_complete(struct mwifiex_adapter *adapter)
125 {
126
127 if (adapter->hw_status == MWIFIEX_HW_STATUS_READY)
128 if (adapter->if_ops.init_fw_port)
129 adapter->if_ops.init_fw_port(adapter);
130
131 adapter->init_wait_q_woken = true;
132 wake_up_interruptible(&adapter->init_wait_q);
133 return 0;
134 }
135
136 /*
137 * This function sends init/shutdown command
138 * to firmware.
139 */
mwifiex_init_shutdown_fw(struct mwifiex_private * priv,u32 func_init_shutdown)140 int mwifiex_init_shutdown_fw(struct mwifiex_private *priv,
141 u32 func_init_shutdown)
142 {
143 u16 cmd;
144
145 if (func_init_shutdown == MWIFIEX_FUNC_INIT) {
146 cmd = HostCmd_CMD_FUNC_INIT;
147 } else if (func_init_shutdown == MWIFIEX_FUNC_SHUTDOWN) {
148 cmd = HostCmd_CMD_FUNC_SHUTDOWN;
149 } else {
150 mwifiex_dbg(priv->adapter, ERROR,
151 "unsupported parameter\n");
152 return -1;
153 }
154
155 return mwifiex_send_cmd(priv, cmd, HostCmd_ACT_GEN_SET, 0, NULL, true);
156 }
157 EXPORT_SYMBOL_GPL(mwifiex_init_shutdown_fw);
158
159 /*
160 * IOCTL request handler to set/get debug information.
161 *
162 * This function collates/sets the information from/to different driver
163 * structures.
164 */
mwifiex_get_debug_info(struct mwifiex_private * priv,struct mwifiex_debug_info * info)165 int mwifiex_get_debug_info(struct mwifiex_private *priv,
166 struct mwifiex_debug_info *info)
167 {
168 struct mwifiex_adapter *adapter = priv->adapter;
169
170 if (info) {
171 info->debug_mask = adapter->debug_mask;
172 memcpy(info->packets_out,
173 priv->wmm.packets_out,
174 sizeof(priv->wmm.packets_out));
175 info->curr_tx_buf_size = (u32) adapter->curr_tx_buf_size;
176 info->tx_buf_size = (u32) adapter->tx_buf_size;
177 info->rx_tbl_num = mwifiex_get_rx_reorder_tbl(priv,
178 info->rx_tbl);
179 info->tx_tbl_num = mwifiex_get_tx_ba_stream_tbl(priv,
180 info->tx_tbl);
181 info->tdls_peer_num = mwifiex_get_tdls_list(priv,
182 info->tdls_list);
183 info->ps_mode = adapter->ps_mode;
184 info->ps_state = adapter->ps_state;
185 info->is_deep_sleep = adapter->is_deep_sleep;
186 info->pm_wakeup_card_req = adapter->pm_wakeup_card_req;
187 info->pm_wakeup_fw_try = adapter->pm_wakeup_fw_try;
188 info->is_hs_configured = test_bit(MWIFIEX_IS_HS_CONFIGURED,
189 &adapter->work_flags);
190 info->hs_activated = adapter->hs_activated;
191 info->is_cmd_timedout = test_bit(MWIFIEX_IS_CMD_TIMEDOUT,
192 &adapter->work_flags);
193 info->num_cmd_host_to_card_failure
194 = adapter->dbg.num_cmd_host_to_card_failure;
195 info->num_cmd_sleep_cfm_host_to_card_failure
196 = adapter->dbg.num_cmd_sleep_cfm_host_to_card_failure;
197 info->num_tx_host_to_card_failure
198 = adapter->dbg.num_tx_host_to_card_failure;
199 info->num_event_deauth = adapter->dbg.num_event_deauth;
200 info->num_event_disassoc = adapter->dbg.num_event_disassoc;
201 info->num_event_link_lost = adapter->dbg.num_event_link_lost;
202 info->num_cmd_deauth = adapter->dbg.num_cmd_deauth;
203 info->num_cmd_assoc_success =
204 adapter->dbg.num_cmd_assoc_success;
205 info->num_cmd_assoc_failure =
206 adapter->dbg.num_cmd_assoc_failure;
207 info->num_tx_timeout = adapter->dbg.num_tx_timeout;
208 info->timeout_cmd_id = adapter->dbg.timeout_cmd_id;
209 info->timeout_cmd_act = adapter->dbg.timeout_cmd_act;
210 memcpy(info->last_cmd_id, adapter->dbg.last_cmd_id,
211 sizeof(adapter->dbg.last_cmd_id));
212 memcpy(info->last_cmd_act, adapter->dbg.last_cmd_act,
213 sizeof(adapter->dbg.last_cmd_act));
214 info->last_cmd_index = adapter->dbg.last_cmd_index;
215 memcpy(info->last_cmd_resp_id, adapter->dbg.last_cmd_resp_id,
216 sizeof(adapter->dbg.last_cmd_resp_id));
217 info->last_cmd_resp_index = adapter->dbg.last_cmd_resp_index;
218 memcpy(info->last_event, adapter->dbg.last_event,
219 sizeof(adapter->dbg.last_event));
220 info->last_event_index = adapter->dbg.last_event_index;
221 memcpy(info->last_mp_wr_bitmap, adapter->dbg.last_mp_wr_bitmap,
222 sizeof(adapter->dbg.last_mp_wr_bitmap));
223 memcpy(info->last_mp_wr_ports, adapter->dbg.last_mp_wr_ports,
224 sizeof(adapter->dbg.last_mp_wr_ports));
225 memcpy(info->last_mp_curr_wr_port,
226 adapter->dbg.last_mp_curr_wr_port,
227 sizeof(adapter->dbg.last_mp_curr_wr_port));
228 memcpy(info->last_mp_wr_len, adapter->dbg.last_mp_wr_len,
229 sizeof(adapter->dbg.last_mp_wr_len));
230 info->last_sdio_mp_index = adapter->dbg.last_sdio_mp_index;
231 info->data_sent = adapter->data_sent;
232 info->cmd_sent = adapter->cmd_sent;
233 info->cmd_resp_received = adapter->cmd_resp_received;
234 }
235
236 return 0;
237 }
238
mwifiex_debug_info_to_buffer(struct mwifiex_private * priv,char * buf,struct mwifiex_debug_info * info)239 int mwifiex_debug_info_to_buffer(struct mwifiex_private *priv, char *buf,
240 struct mwifiex_debug_info *info)
241 {
242 char *p = buf;
243 struct mwifiex_debug_data *d = &items[0];
244 size_t size, addr;
245 long val;
246 int i, j;
247
248 if (!info)
249 return 0;
250
251 for (i = 0; i < num_of_items; i++) {
252 p += sprintf(p, "%s=", d[i].name);
253
254 size = d[i].size / d[i].num;
255
256 if (i < (num_of_items - 3))
257 addr = d[i].addr + (size_t)info;
258 else /* The last 3 items are struct mwifiex_adapter variables */
259 addr = d[i].addr + (size_t)priv->adapter;
260
261 for (j = 0; j < d[i].num; j++) {
262 switch (size) {
263 case 1:
264 val = *((u8 *)addr);
265 break;
266 case 2:
267 val = get_unaligned((u16 *)addr);
268 break;
269 case 4:
270 val = get_unaligned((u32 *)addr);
271 break;
272 case 8:
273 val = get_unaligned((long long *)addr);
274 break;
275 default:
276 val = -1;
277 break;
278 }
279
280 p += sprintf(p, "%#lx ", val);
281 addr += size;
282 }
283
284 p += sprintf(p, "\n");
285 }
286
287 if (info->tx_tbl_num) {
288 p += sprintf(p, "Tx BA stream table:\n");
289 for (i = 0; i < info->tx_tbl_num; i++)
290 p += sprintf(p, "tid = %d, ra = %pM\n",
291 info->tx_tbl[i].tid, info->tx_tbl[i].ra);
292 }
293
294 if (info->rx_tbl_num) {
295 p += sprintf(p, "Rx reorder table:\n");
296 for (i = 0; i < info->rx_tbl_num; i++) {
297 p += sprintf(p, "tid = %d, ta = %pM, ",
298 info->rx_tbl[i].tid,
299 info->rx_tbl[i].ta);
300 p += sprintf(p, "start_win = %d, ",
301 info->rx_tbl[i].start_win);
302 p += sprintf(p, "win_size = %d, buffer: ",
303 info->rx_tbl[i].win_size);
304
305 for (j = 0; j < info->rx_tbl[i].win_size; j++)
306 p += sprintf(p, "%c ",
307 info->rx_tbl[i].buffer[j] ?
308 '1' : '0');
309
310 p += sprintf(p, "\n");
311 }
312 }
313
314 if (info->tdls_peer_num) {
315 p += sprintf(p, "TDLS peer table:\n");
316 for (i = 0; i < info->tdls_peer_num; i++) {
317 p += sprintf(p, "peer = %pM",
318 info->tdls_list[i].peer_addr);
319 p += sprintf(p, "\n");
320 }
321 }
322
323 return p - buf;
324 }
325
326 static int
mwifiex_parse_mgmt_packet(struct mwifiex_private * priv,u8 * payload,u16 len,struct rxpd * rx_pd)327 mwifiex_parse_mgmt_packet(struct mwifiex_private *priv, u8 *payload, u16 len,
328 struct rxpd *rx_pd)
329 {
330 u16 stype;
331 u8 category, action_code, *addr2;
332 struct ieee80211_hdr *ieee_hdr = (void *)payload;
333
334 stype = (le16_to_cpu(ieee_hdr->frame_control) & IEEE80211_FCTL_STYPE);
335
336 switch (stype) {
337 case IEEE80211_STYPE_ACTION:
338 category = *(payload + sizeof(struct ieee80211_hdr));
339 switch (category) {
340 case WLAN_CATEGORY_PUBLIC:
341 action_code = *(payload + sizeof(struct ieee80211_hdr)
342 + 1);
343 if (action_code == WLAN_PUB_ACTION_TDLS_DISCOVER_RES) {
344 addr2 = ieee_hdr->addr2;
345 mwifiex_dbg(priv->adapter, INFO,
346 "TDLS discovery response %pM nf=%d, snr=%d\n",
347 addr2, rx_pd->nf, rx_pd->snr);
348 mwifiex_auto_tdls_update_peer_signal(priv,
349 addr2,
350 rx_pd->snr,
351 rx_pd->nf);
352 }
353 break;
354 case WLAN_CATEGORY_BACK:
355 /*we dont indicate BACK action frames to cfg80211*/
356 mwifiex_dbg(priv->adapter, INFO,
357 "drop BACK action frames");
358 return -1;
359 default:
360 mwifiex_dbg(priv->adapter, INFO,
361 "unknown public action frame category %d\n",
362 category);
363 }
364 break;
365 default:
366 mwifiex_dbg(priv->adapter, INFO,
367 "unknown mgmt frame subtype %#x\n", stype);
368 return 0;
369 }
370
371 return 0;
372 }
373 /*
374 * This function processes the received management packet and send it
375 * to the kernel.
376 */
377 int
mwifiex_process_mgmt_packet(struct mwifiex_private * priv,struct sk_buff * skb)378 mwifiex_process_mgmt_packet(struct mwifiex_private *priv,
379 struct sk_buff *skb)
380 {
381 struct rxpd *rx_pd;
382 u16 pkt_len;
383 struct ieee80211_hdr *ieee_hdr;
384
385 if (!skb)
386 return -1;
387
388 if (!priv->mgmt_frame_mask ||
389 priv->wdev.iftype == NL80211_IFTYPE_UNSPECIFIED) {
390 mwifiex_dbg(priv->adapter, ERROR,
391 "do not receive mgmt frames on uninitialized intf");
392 return -1;
393 }
394
395 rx_pd = (struct rxpd *)skb->data;
396 pkt_len = le16_to_cpu(rx_pd->rx_pkt_length);
397 if (pkt_len < sizeof(struct ieee80211_hdr) + sizeof(pkt_len)) {
398 mwifiex_dbg(priv->adapter, ERROR, "invalid rx_pkt_length");
399 return -1;
400 }
401
402 skb_pull(skb, le16_to_cpu(rx_pd->rx_pkt_offset));
403 skb_pull(skb, sizeof(pkt_len));
404 pkt_len -= sizeof(pkt_len);
405
406 ieee_hdr = (void *)skb->data;
407 if (ieee80211_is_mgmt(ieee_hdr->frame_control)) {
408 if (mwifiex_parse_mgmt_packet(priv, (u8 *)ieee_hdr,
409 pkt_len, rx_pd))
410 return -1;
411 }
412 /* Remove address4 */
413 memmove(skb->data + sizeof(struct ieee80211_hdr_3addr),
414 skb->data + sizeof(struct ieee80211_hdr),
415 pkt_len - sizeof(struct ieee80211_hdr));
416
417 pkt_len -= ETH_ALEN;
418 rx_pd->rx_pkt_length = cpu_to_le16(pkt_len);
419
420 cfg80211_rx_mgmt(&priv->wdev, priv->roc_cfg.chan.center_freq,
421 CAL_RSSI(rx_pd->snr, rx_pd->nf), skb->data, pkt_len,
422 0);
423
424 return 0;
425 }
426
427 /*
428 * This function processes the received packet before sending it to the
429 * kernel.
430 *
431 * It extracts the SKB from the received buffer and sends it to kernel.
432 * In case the received buffer does not contain the data in SKB format,
433 * the function creates a blank SKB, fills it with the data from the
434 * received buffer and then sends this new SKB to the kernel.
435 */
mwifiex_recv_packet(struct mwifiex_private * priv,struct sk_buff * skb)436 int mwifiex_recv_packet(struct mwifiex_private *priv, struct sk_buff *skb)
437 {
438 struct mwifiex_sta_node *src_node;
439 struct ethhdr *p_ethhdr;
440
441 if (!skb)
442 return -1;
443
444 priv->stats.rx_bytes += skb->len;
445 priv->stats.rx_packets++;
446
447 if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_UAP) {
448 p_ethhdr = (void *)skb->data;
449 src_node = mwifiex_get_sta_entry(priv, p_ethhdr->h_source);
450 if (src_node) {
451 src_node->stats.last_rx = jiffies;
452 src_node->stats.rx_bytes += skb->len;
453 src_node->stats.rx_packets++;
454 }
455 }
456
457 skb->dev = priv->netdev;
458 skb->protocol = eth_type_trans(skb, priv->netdev);
459 skb->ip_summed = CHECKSUM_NONE;
460
461 /* This is required only in case of 11n and USB/PCIE as we alloc
462 * a buffer of 4K only if its 11N (to be able to receive 4K
463 * AMSDU packets). In case of SD we allocate buffers based
464 * on the size of packet and hence this is not needed.
465 *
466 * Modifying the truesize here as our allocation for each
467 * skb is 4K but we only receive 2K packets and this cause
468 * the kernel to start dropping packets in case where
469 * application has allocated buffer based on 2K size i.e.
470 * if there a 64K packet received (in IP fragments and
471 * application allocates 64K to receive this packet but
472 * this packet would almost double up because we allocate
473 * each 1.5K fragment in 4K and pass it up. As soon as the
474 * 64K limit hits kernel will start to drop rest of the
475 * fragments. Currently we fail the Filesndl-ht.scr script
476 * for UDP, hence this fix
477 */
478 if ((priv->adapter->iface_type == MWIFIEX_USB ||
479 priv->adapter->iface_type == MWIFIEX_PCIE) &&
480 (skb->truesize > MWIFIEX_RX_DATA_BUF_SIZE))
481 skb->truesize += (skb->len - MWIFIEX_RX_DATA_BUF_SIZE);
482
483 netif_rx(skb);
484 return 0;
485 }
486
487 /*
488 * IOCTL completion callback handler.
489 *
490 * This function is called when a pending IOCTL is completed.
491 *
492 * If work queue support is enabled, the function wakes up the
493 * corresponding waiting function. Otherwise, it processes the
494 * IOCTL response and frees the response buffer.
495 */
mwifiex_complete_cmd(struct mwifiex_adapter * adapter,struct cmd_ctrl_node * cmd_node)496 int mwifiex_complete_cmd(struct mwifiex_adapter *adapter,
497 struct cmd_ctrl_node *cmd_node)
498 {
499 WARN_ON(!cmd_node->wait_q_enabled);
500 mwifiex_dbg(adapter, CMD, "cmd completed: status=%d\n",
501 adapter->cmd_wait_q.status);
502
503 *cmd_node->condition = true;
504 wake_up_interruptible(&adapter->cmd_wait_q.wait);
505
506 return 0;
507 }
508
509 /* This function will return the pointer to station entry in station list
510 * table which matches specified mac address.
511 * This function should be called after acquiring RA list spinlock.
512 * NULL is returned if station entry is not found in associated STA list.
513 */
514 struct mwifiex_sta_node *
mwifiex_get_sta_entry(struct mwifiex_private * priv,const u8 * mac)515 mwifiex_get_sta_entry(struct mwifiex_private *priv, const u8 *mac)
516 {
517 struct mwifiex_sta_node *node;
518
519 if (!mac)
520 return NULL;
521
522 list_for_each_entry(node, &priv->sta_list, list) {
523 if (!memcmp(node->mac_addr, mac, ETH_ALEN))
524 return node;
525 }
526
527 return NULL;
528 }
529
530 static struct mwifiex_sta_node *
mwifiex_get_tdls_sta_entry(struct mwifiex_private * priv,u8 status)531 mwifiex_get_tdls_sta_entry(struct mwifiex_private *priv, u8 status)
532 {
533 struct mwifiex_sta_node *node;
534
535 list_for_each_entry(node, &priv->sta_list, list) {
536 if (node->tdls_status == status)
537 return node;
538 }
539
540 return NULL;
541 }
542
543 /* If tdls channel switching is on-going, tx data traffic should be
544 * blocked until the switching stage completed.
545 */
mwifiex_is_tdls_chan_switching(struct mwifiex_private * priv)546 u8 mwifiex_is_tdls_chan_switching(struct mwifiex_private *priv)
547 {
548 struct mwifiex_sta_node *sta_ptr;
549
550 if (!priv || !ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info))
551 return false;
552
553 sta_ptr = mwifiex_get_tdls_sta_entry(priv, TDLS_CHAN_SWITCHING);
554 if (sta_ptr)
555 return true;
556
557 return false;
558 }
559
mwifiex_is_tdls_off_chan(struct mwifiex_private * priv)560 u8 mwifiex_is_tdls_off_chan(struct mwifiex_private *priv)
561 {
562 struct mwifiex_sta_node *sta_ptr;
563
564 if (!priv || !ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info))
565 return false;
566
567 sta_ptr = mwifiex_get_tdls_sta_entry(priv, TDLS_IN_OFF_CHAN);
568 if (sta_ptr)
569 return true;
570
571 return false;
572 }
573
574 /* If tdls channel switching is on-going or tdls operate on off-channel,
575 * cmd path should be blocked until tdls switched to base-channel.
576 */
mwifiex_is_send_cmd_allowed(struct mwifiex_private * priv)577 u8 mwifiex_is_send_cmd_allowed(struct mwifiex_private *priv)
578 {
579 if (!priv || !ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info))
580 return true;
581
582 if (mwifiex_is_tdls_chan_switching(priv) ||
583 mwifiex_is_tdls_off_chan(priv))
584 return false;
585
586 return true;
587 }
588
589 /* This function will add a sta_node entry to associated station list
590 * table with the given mac address.
591 * If entry exist already, existing entry is returned.
592 * If received mac address is NULL, NULL is returned.
593 */
594 struct mwifiex_sta_node *
mwifiex_add_sta_entry(struct mwifiex_private * priv,const u8 * mac)595 mwifiex_add_sta_entry(struct mwifiex_private *priv, const u8 *mac)
596 {
597 struct mwifiex_sta_node *node;
598
599 if (!mac)
600 return NULL;
601
602 spin_lock_bh(&priv->sta_list_spinlock);
603 node = mwifiex_get_sta_entry(priv, mac);
604 if (node)
605 goto done;
606
607 node = kzalloc(sizeof(*node), GFP_ATOMIC);
608 if (!node)
609 goto done;
610
611 memcpy(node->mac_addr, mac, ETH_ALEN);
612 list_add_tail(&node->list, &priv->sta_list);
613
614 done:
615 spin_unlock_bh(&priv->sta_list_spinlock);
616 return node;
617 }
618
619 /* This function will search for HT IE in association request IEs
620 * and set station HT parameters accordingly.
621 */
622 void
mwifiex_set_sta_ht_cap(struct mwifiex_private * priv,const u8 * ies,int ies_len,struct mwifiex_sta_node * node)623 mwifiex_set_sta_ht_cap(struct mwifiex_private *priv, const u8 *ies,
624 int ies_len, struct mwifiex_sta_node *node)
625 {
626 struct ieee_types_header *ht_cap_ie;
627 const struct ieee80211_ht_cap *ht_cap;
628
629 if (!ies)
630 return;
631
632 ht_cap_ie = (void *)cfg80211_find_ie(WLAN_EID_HT_CAPABILITY, ies,
633 ies_len);
634 if (ht_cap_ie) {
635 ht_cap = (void *)(ht_cap_ie + 1);
636 node->is_11n_enabled = 1;
637 node->max_amsdu = le16_to_cpu(ht_cap->cap_info) &
638 IEEE80211_HT_CAP_MAX_AMSDU ?
639 MWIFIEX_TX_DATA_BUF_SIZE_8K :
640 MWIFIEX_TX_DATA_BUF_SIZE_4K;
641 } else {
642 node->is_11n_enabled = 0;
643 }
644
645 return;
646 }
647
648 /* This function will delete a station entry from station list */
mwifiex_del_sta_entry(struct mwifiex_private * priv,const u8 * mac)649 void mwifiex_del_sta_entry(struct mwifiex_private *priv, const u8 *mac)
650 {
651 struct mwifiex_sta_node *node;
652
653 spin_lock_bh(&priv->sta_list_spinlock);
654
655 node = mwifiex_get_sta_entry(priv, mac);
656 if (node) {
657 list_del(&node->list);
658 kfree(node);
659 }
660
661 spin_unlock_bh(&priv->sta_list_spinlock);
662 return;
663 }
664
665 /* This function will delete all stations from associated station list. */
mwifiex_del_all_sta_list(struct mwifiex_private * priv)666 void mwifiex_del_all_sta_list(struct mwifiex_private *priv)
667 {
668 struct mwifiex_sta_node *node, *tmp;
669
670 spin_lock_bh(&priv->sta_list_spinlock);
671
672 list_for_each_entry_safe(node, tmp, &priv->sta_list, list) {
673 list_del(&node->list);
674 kfree(node);
675 }
676
677 INIT_LIST_HEAD(&priv->sta_list);
678 spin_unlock_bh(&priv->sta_list_spinlock);
679 return;
680 }
681
682 /* This function adds histogram data to histogram array*/
mwifiex_hist_data_add(struct mwifiex_private * priv,u8 rx_rate,s8 snr,s8 nflr)683 void mwifiex_hist_data_add(struct mwifiex_private *priv,
684 u8 rx_rate, s8 snr, s8 nflr)
685 {
686 struct mwifiex_histogram_data *phist_data = priv->hist_data;
687
688 if (atomic_read(&phist_data->num_samples) > MWIFIEX_HIST_MAX_SAMPLES)
689 mwifiex_hist_data_reset(priv);
690 mwifiex_hist_data_set(priv, rx_rate, snr, nflr);
691 }
692
693 /* function to add histogram record */
mwifiex_hist_data_set(struct mwifiex_private * priv,u8 rx_rate,s8 snr,s8 nflr)694 void mwifiex_hist_data_set(struct mwifiex_private *priv, u8 rx_rate, s8 snr,
695 s8 nflr)
696 {
697 struct mwifiex_histogram_data *phist_data = priv->hist_data;
698 s8 nf = -nflr;
699 s8 rssi = snr - nflr;
700
701 atomic_inc(&phist_data->num_samples);
702 atomic_inc(&phist_data->rx_rate[rx_rate]);
703 atomic_inc(&phist_data->snr[snr + 128]);
704 atomic_inc(&phist_data->noise_flr[nf + 128]);
705 atomic_inc(&phist_data->sig_str[rssi + 128]);
706 }
707
708 /* function to reset histogram data during init/reset */
mwifiex_hist_data_reset(struct mwifiex_private * priv)709 void mwifiex_hist_data_reset(struct mwifiex_private *priv)
710 {
711 int ix;
712 struct mwifiex_histogram_data *phist_data = priv->hist_data;
713
714 atomic_set(&phist_data->num_samples, 0);
715 for (ix = 0; ix < MWIFIEX_MAX_AC_RX_RATES; ix++)
716 atomic_set(&phist_data->rx_rate[ix], 0);
717 for (ix = 0; ix < MWIFIEX_MAX_SNR; ix++)
718 atomic_set(&phist_data->snr[ix], 0);
719 for (ix = 0; ix < MWIFIEX_MAX_NOISE_FLR; ix++)
720 atomic_set(&phist_data->noise_flr[ix], 0);
721 for (ix = 0; ix < MWIFIEX_MAX_SIG_STRENGTH; ix++)
722 atomic_set(&phist_data->sig_str[ix], 0);
723 }
724
mwifiex_alloc_dma_align_buf(int rx_len,gfp_t flags)725 void *mwifiex_alloc_dma_align_buf(int rx_len, gfp_t flags)
726 {
727 struct sk_buff *skb;
728 int buf_len, pad;
729
730 buf_len = rx_len + MWIFIEX_RX_HEADROOM + MWIFIEX_DMA_ALIGN_SZ;
731
732 skb = __dev_alloc_skb(buf_len, flags);
733
734 if (!skb)
735 return NULL;
736
737 skb_reserve(skb, MWIFIEX_RX_HEADROOM);
738
739 pad = MWIFIEX_ALIGN_ADDR(skb->data, MWIFIEX_DMA_ALIGN_SZ) -
740 (long)skb->data;
741
742 skb_reserve(skb, pad);
743
744 return skb;
745 }
746 EXPORT_SYMBOL_GPL(mwifiex_alloc_dma_align_buf);
747
mwifiex_fw_dump_event(struct mwifiex_private * priv)748 void mwifiex_fw_dump_event(struct mwifiex_private *priv)
749 {
750 mwifiex_send_cmd(priv, HostCmd_CMD_FW_DUMP_EVENT, HostCmd_ACT_GEN_SET,
751 0, NULL, true);
752 }
753 EXPORT_SYMBOL_GPL(mwifiex_fw_dump_event);
754