1 /*
2 * NXP Wireless LAN device driver: utility functions
3 *
4 * Copyright 2011-2020 NXP
5 *
6 * This software file (the "File") is distributed by NXP
7 * under the terms of the GNU General Public License Version 2, June 1991
8 * (the "License"). You may use, redistribute and/or modify this File in
9 * accordance with the terms and conditions of the License, a copy of which
10 * is available by writing to the Free Software Foundation, Inc.,
11 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
12 * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
13 *
14 * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
16 * ARE EXPRESSLY DISCLAIMED. The License provides additional details about
17 * this warranty disclaimer.
18 */
19
20 #include "decl.h"
21 #include "ioctl.h"
22 #include "util.h"
23 #include "fw.h"
24 #include "main.h"
25 #include "wmm.h"
26 #include "11n.h"
27
28 static struct mwifiex_debug_data items[] = {
29 {"debug_mask", item_size(debug_mask),
30 item_addr(debug_mask), 1},
31 {"int_counter", item_size(int_counter),
32 item_addr(int_counter), 1},
33 {"wmm_ac_vo", item_size(packets_out[WMM_AC_VO]),
34 item_addr(packets_out[WMM_AC_VO]), 1},
35 {"wmm_ac_vi", item_size(packets_out[WMM_AC_VI]),
36 item_addr(packets_out[WMM_AC_VI]), 1},
37 {"wmm_ac_be", item_size(packets_out[WMM_AC_BE]),
38 item_addr(packets_out[WMM_AC_BE]), 1},
39 {"wmm_ac_bk", item_size(packets_out[WMM_AC_BK]),
40 item_addr(packets_out[WMM_AC_BK]), 1},
41 {"tx_buf_size", item_size(tx_buf_size),
42 item_addr(tx_buf_size), 1},
43 {"curr_tx_buf_size", item_size(curr_tx_buf_size),
44 item_addr(curr_tx_buf_size), 1},
45 {"ps_mode", item_size(ps_mode),
46 item_addr(ps_mode), 1},
47 {"ps_state", item_size(ps_state),
48 item_addr(ps_state), 1},
49 {"is_deep_sleep", item_size(is_deep_sleep),
50 item_addr(is_deep_sleep), 1},
51 {"wakeup_dev_req", item_size(pm_wakeup_card_req),
52 item_addr(pm_wakeup_card_req), 1},
53 {"wakeup_tries", item_size(pm_wakeup_fw_try),
54 item_addr(pm_wakeup_fw_try), 1},
55 {"hs_configured", item_size(is_hs_configured),
56 item_addr(is_hs_configured), 1},
57 {"hs_activated", item_size(hs_activated),
58 item_addr(hs_activated), 1},
59 {"num_tx_timeout", item_size(num_tx_timeout),
60 item_addr(num_tx_timeout), 1},
61 {"is_cmd_timedout", item_size(is_cmd_timedout),
62 item_addr(is_cmd_timedout), 1},
63 {"timeout_cmd_id", item_size(timeout_cmd_id),
64 item_addr(timeout_cmd_id), 1},
65 {"timeout_cmd_act", item_size(timeout_cmd_act),
66 item_addr(timeout_cmd_act), 1},
67 {"last_cmd_id", item_size(last_cmd_id),
68 item_addr(last_cmd_id), DBG_CMD_NUM},
69 {"last_cmd_act", item_size(last_cmd_act),
70 item_addr(last_cmd_act), DBG_CMD_NUM},
71 {"last_cmd_index", item_size(last_cmd_index),
72 item_addr(last_cmd_index), 1},
73 {"last_cmd_resp_id", item_size(last_cmd_resp_id),
74 item_addr(last_cmd_resp_id), DBG_CMD_NUM},
75 {"last_cmd_resp_index", item_size(last_cmd_resp_index),
76 item_addr(last_cmd_resp_index), 1},
77 {"last_event", item_size(last_event),
78 item_addr(last_event), DBG_CMD_NUM},
79 {"last_event_index", item_size(last_event_index),
80 item_addr(last_event_index), 1},
81 {"last_mp_wr_bitmap", item_size(last_mp_wr_bitmap),
82 item_addr(last_mp_wr_bitmap), MWIFIEX_DBG_SDIO_MP_NUM},
83 {"last_mp_wr_ports", item_size(last_mp_wr_ports),
84 item_addr(last_mp_wr_ports), MWIFIEX_DBG_SDIO_MP_NUM},
85 {"last_mp_wr_len", item_size(last_mp_wr_len),
86 item_addr(last_mp_wr_len), MWIFIEX_DBG_SDIO_MP_NUM},
87 {"last_mp_curr_wr_port", item_size(last_mp_curr_wr_port),
88 item_addr(last_mp_curr_wr_port), MWIFIEX_DBG_SDIO_MP_NUM},
89 {"last_sdio_mp_index", item_size(last_sdio_mp_index),
90 item_addr(last_sdio_mp_index), 1},
91 {"num_cmd_h2c_fail", item_size(num_cmd_host_to_card_failure),
92 item_addr(num_cmd_host_to_card_failure), 1},
93 {"num_cmd_sleep_cfm_fail",
94 item_size(num_cmd_sleep_cfm_host_to_card_failure),
95 item_addr(num_cmd_sleep_cfm_host_to_card_failure), 1},
96 {"num_tx_h2c_fail", item_size(num_tx_host_to_card_failure),
97 item_addr(num_tx_host_to_card_failure), 1},
98 {"num_evt_deauth", item_size(num_event_deauth),
99 item_addr(num_event_deauth), 1},
100 {"num_evt_disassoc", item_size(num_event_disassoc),
101 item_addr(num_event_disassoc), 1},
102 {"num_evt_link_lost", item_size(num_event_link_lost),
103 item_addr(num_event_link_lost), 1},
104 {"num_cmd_deauth", item_size(num_cmd_deauth),
105 item_addr(num_cmd_deauth), 1},
106 {"num_cmd_assoc_ok", item_size(num_cmd_assoc_success),
107 item_addr(num_cmd_assoc_success), 1},
108 {"num_cmd_assoc_fail", item_size(num_cmd_assoc_failure),
109 item_addr(num_cmd_assoc_failure), 1},
110 {"cmd_sent", item_size(cmd_sent),
111 item_addr(cmd_sent), 1},
112 {"data_sent", item_size(data_sent),
113 item_addr(data_sent), 1},
114 {"cmd_resp_received", item_size(cmd_resp_received),
115 item_addr(cmd_resp_received), 1},
116 {"event_received", item_size(event_received),
117 item_addr(event_received), 1},
118
119 /* variables defined in struct mwifiex_adapter */
120 {"cmd_pending", adapter_item_size(cmd_pending),
121 adapter_item_addr(cmd_pending), 1},
122 {"tx_pending", adapter_item_size(tx_pending),
123 adapter_item_addr(tx_pending), 1},
124 {"rx_pending", adapter_item_size(rx_pending),
125 adapter_item_addr(rx_pending), 1},
126 };
127
128 static int num_of_items = ARRAY_SIZE(items);
129
130 /*
131 * Firmware initialization complete callback handler.
132 *
133 * This function wakes up the function waiting on the init
134 * wait queue for the firmware initialization to complete.
135 */
mwifiex_init_fw_complete(struct mwifiex_adapter * adapter)136 int mwifiex_init_fw_complete(struct mwifiex_adapter *adapter)
137 {
138
139 if (adapter->hw_status == MWIFIEX_HW_STATUS_READY)
140 if (adapter->if_ops.init_fw_port)
141 adapter->if_ops.init_fw_port(adapter);
142
143 adapter->init_wait_q_woken = true;
144 wake_up_interruptible(&adapter->init_wait_q);
145 return 0;
146 }
147
148 /*
149 * This function sends init/shutdown command
150 * to firmware.
151 */
mwifiex_init_shutdown_fw(struct mwifiex_private * priv,u32 func_init_shutdown)152 int mwifiex_init_shutdown_fw(struct mwifiex_private *priv,
153 u32 func_init_shutdown)
154 {
155 u16 cmd;
156
157 if (func_init_shutdown == MWIFIEX_FUNC_INIT) {
158 cmd = HostCmd_CMD_FUNC_INIT;
159 } else if (func_init_shutdown == MWIFIEX_FUNC_SHUTDOWN) {
160 cmd = HostCmd_CMD_FUNC_SHUTDOWN;
161 } else {
162 mwifiex_dbg(priv->adapter, ERROR,
163 "unsupported parameter\n");
164 return -1;
165 }
166
167 return mwifiex_send_cmd(priv, cmd, HostCmd_ACT_GEN_SET, 0, NULL, true);
168 }
169 EXPORT_SYMBOL_GPL(mwifiex_init_shutdown_fw);
170
171 /*
172 * IOCTL request handler to set/get debug information.
173 *
174 * This function collates/sets the information from/to different driver
175 * structures.
176 */
mwifiex_get_debug_info(struct mwifiex_private * priv,struct mwifiex_debug_info * info)177 int mwifiex_get_debug_info(struct mwifiex_private *priv,
178 struct mwifiex_debug_info *info)
179 {
180 struct mwifiex_adapter *adapter = priv->adapter;
181
182 if (info) {
183 info->debug_mask = adapter->debug_mask;
184 memcpy(info->packets_out,
185 priv->wmm.packets_out,
186 sizeof(priv->wmm.packets_out));
187 info->curr_tx_buf_size = (u32) adapter->curr_tx_buf_size;
188 info->tx_buf_size = (u32) adapter->tx_buf_size;
189 info->rx_tbl_num = mwifiex_get_rx_reorder_tbl(priv,
190 info->rx_tbl);
191 info->tx_tbl_num = mwifiex_get_tx_ba_stream_tbl(priv,
192 info->tx_tbl);
193 info->tdls_peer_num = mwifiex_get_tdls_list(priv,
194 info->tdls_list);
195 info->ps_mode = adapter->ps_mode;
196 info->ps_state = adapter->ps_state;
197 info->is_deep_sleep = adapter->is_deep_sleep;
198 info->pm_wakeup_card_req = adapter->pm_wakeup_card_req;
199 info->pm_wakeup_fw_try = adapter->pm_wakeup_fw_try;
200 info->is_hs_configured = test_bit(MWIFIEX_IS_HS_CONFIGURED,
201 &adapter->work_flags);
202 info->hs_activated = adapter->hs_activated;
203 info->is_cmd_timedout = test_bit(MWIFIEX_IS_CMD_TIMEDOUT,
204 &adapter->work_flags);
205 info->num_cmd_host_to_card_failure
206 = adapter->dbg.num_cmd_host_to_card_failure;
207 info->num_cmd_sleep_cfm_host_to_card_failure
208 = adapter->dbg.num_cmd_sleep_cfm_host_to_card_failure;
209 info->num_tx_host_to_card_failure
210 = adapter->dbg.num_tx_host_to_card_failure;
211 info->num_event_deauth = adapter->dbg.num_event_deauth;
212 info->num_event_disassoc = adapter->dbg.num_event_disassoc;
213 info->num_event_link_lost = adapter->dbg.num_event_link_lost;
214 info->num_cmd_deauth = adapter->dbg.num_cmd_deauth;
215 info->num_cmd_assoc_success =
216 adapter->dbg.num_cmd_assoc_success;
217 info->num_cmd_assoc_failure =
218 adapter->dbg.num_cmd_assoc_failure;
219 info->num_tx_timeout = adapter->dbg.num_tx_timeout;
220 info->timeout_cmd_id = adapter->dbg.timeout_cmd_id;
221 info->timeout_cmd_act = adapter->dbg.timeout_cmd_act;
222 memcpy(info->last_cmd_id, adapter->dbg.last_cmd_id,
223 sizeof(adapter->dbg.last_cmd_id));
224 memcpy(info->last_cmd_act, adapter->dbg.last_cmd_act,
225 sizeof(adapter->dbg.last_cmd_act));
226 info->last_cmd_index = adapter->dbg.last_cmd_index;
227 memcpy(info->last_cmd_resp_id, adapter->dbg.last_cmd_resp_id,
228 sizeof(adapter->dbg.last_cmd_resp_id));
229 info->last_cmd_resp_index = adapter->dbg.last_cmd_resp_index;
230 memcpy(info->last_event, adapter->dbg.last_event,
231 sizeof(adapter->dbg.last_event));
232 info->last_event_index = adapter->dbg.last_event_index;
233 memcpy(info->last_mp_wr_bitmap, adapter->dbg.last_mp_wr_bitmap,
234 sizeof(adapter->dbg.last_mp_wr_bitmap));
235 memcpy(info->last_mp_wr_ports, adapter->dbg.last_mp_wr_ports,
236 sizeof(adapter->dbg.last_mp_wr_ports));
237 memcpy(info->last_mp_curr_wr_port,
238 adapter->dbg.last_mp_curr_wr_port,
239 sizeof(adapter->dbg.last_mp_curr_wr_port));
240 memcpy(info->last_mp_wr_len, adapter->dbg.last_mp_wr_len,
241 sizeof(adapter->dbg.last_mp_wr_len));
242 info->last_sdio_mp_index = adapter->dbg.last_sdio_mp_index;
243 info->data_sent = adapter->data_sent;
244 info->cmd_sent = adapter->cmd_sent;
245 info->cmd_resp_received = adapter->cmd_resp_received;
246 }
247
248 return 0;
249 }
250
mwifiex_debug_info_to_buffer(struct mwifiex_private * priv,char * buf,struct mwifiex_debug_info * info)251 int mwifiex_debug_info_to_buffer(struct mwifiex_private *priv, char *buf,
252 struct mwifiex_debug_info *info)
253 {
254 char *p = buf;
255 struct mwifiex_debug_data *d = &items[0];
256 size_t size, addr;
257 long val;
258 int i, j;
259
260 if (!info)
261 return 0;
262
263 for (i = 0; i < num_of_items; i++) {
264 p += sprintf(p, "%s=", d[i].name);
265
266 size = d[i].size / d[i].num;
267
268 if (i < (num_of_items - 3))
269 addr = d[i].addr + (size_t)info;
270 else /* The last 3 items are struct mwifiex_adapter variables */
271 addr = d[i].addr + (size_t)priv->adapter;
272
273 for (j = 0; j < d[i].num; j++) {
274 switch (size) {
275 case 1:
276 val = *((u8 *)addr);
277 break;
278 case 2:
279 val = get_unaligned((u16 *)addr);
280 break;
281 case 4:
282 val = get_unaligned((u32 *)addr);
283 break;
284 case 8:
285 val = get_unaligned((long long *)addr);
286 break;
287 default:
288 val = -1;
289 break;
290 }
291
292 p += sprintf(p, "%#lx ", val);
293 addr += size;
294 }
295
296 p += sprintf(p, "\n");
297 }
298
299 if (info->tx_tbl_num) {
300 p += sprintf(p, "Tx BA stream table:\n");
301 for (i = 0; i < info->tx_tbl_num; i++)
302 p += sprintf(p, "tid = %d, ra = %pM\n",
303 info->tx_tbl[i].tid, info->tx_tbl[i].ra);
304 }
305
306 if (info->rx_tbl_num) {
307 p += sprintf(p, "Rx reorder table:\n");
308 for (i = 0; i < info->rx_tbl_num; i++) {
309 p += sprintf(p, "tid = %d, ta = %pM, ",
310 info->rx_tbl[i].tid,
311 info->rx_tbl[i].ta);
312 p += sprintf(p, "start_win = %d, ",
313 info->rx_tbl[i].start_win);
314 p += sprintf(p, "win_size = %d, buffer: ",
315 info->rx_tbl[i].win_size);
316
317 for (j = 0; j < info->rx_tbl[i].win_size; j++)
318 p += sprintf(p, "%c ",
319 info->rx_tbl[i].buffer[j] ?
320 '1' : '0');
321
322 p += sprintf(p, "\n");
323 }
324 }
325
326 if (info->tdls_peer_num) {
327 p += sprintf(p, "TDLS peer table:\n");
328 for (i = 0; i < info->tdls_peer_num; i++) {
329 p += sprintf(p, "peer = %pM",
330 info->tdls_list[i].peer_addr);
331 p += sprintf(p, "\n");
332 }
333 }
334
335 return p - buf;
336 }
337
338 static int
mwifiex_parse_mgmt_packet(struct mwifiex_private * priv,u8 * payload,u16 len,struct rxpd * rx_pd)339 mwifiex_parse_mgmt_packet(struct mwifiex_private *priv, u8 *payload, u16 len,
340 struct rxpd *rx_pd)
341 {
342 u16 stype;
343 u8 category, action_code, *addr2;
344 struct ieee80211_hdr *ieee_hdr = (void *)payload;
345
346 stype = (le16_to_cpu(ieee_hdr->frame_control) & IEEE80211_FCTL_STYPE);
347
348 switch (stype) {
349 case IEEE80211_STYPE_ACTION:
350 category = *(payload + sizeof(struct ieee80211_hdr));
351 switch (category) {
352 case WLAN_CATEGORY_PUBLIC:
353 action_code = *(payload + sizeof(struct ieee80211_hdr)
354 + 1);
355 if (action_code == WLAN_PUB_ACTION_TDLS_DISCOVER_RES) {
356 addr2 = ieee_hdr->addr2;
357 mwifiex_dbg(priv->adapter, INFO,
358 "TDLS discovery response %pM nf=%d, snr=%d\n",
359 addr2, rx_pd->nf, rx_pd->snr);
360 mwifiex_auto_tdls_update_peer_signal(priv,
361 addr2,
362 rx_pd->snr,
363 rx_pd->nf);
364 }
365 break;
366 case WLAN_CATEGORY_BACK:
367 /*we dont indicate BACK action frames to cfg80211*/
368 mwifiex_dbg(priv->adapter, INFO,
369 "drop BACK action frames");
370 return -1;
371 default:
372 mwifiex_dbg(priv->adapter, INFO,
373 "unknown public action frame category %d\n",
374 category);
375 }
376 break;
377 default:
378 mwifiex_dbg(priv->adapter, INFO,
379 "unknown mgmt frame subtype %#x\n", stype);
380 return 0;
381 }
382
383 return 0;
384 }
385 /*
386 * This function processes the received management packet and send it
387 * to the kernel.
388 */
389 int
mwifiex_process_mgmt_packet(struct mwifiex_private * priv,struct sk_buff * skb)390 mwifiex_process_mgmt_packet(struct mwifiex_private *priv,
391 struct sk_buff *skb)
392 {
393 struct rxpd *rx_pd;
394 u16 pkt_len;
395 struct ieee80211_hdr *ieee_hdr;
396
397 if (!skb)
398 return -1;
399
400 if (!priv->mgmt_frame_mask ||
401 priv->wdev.iftype == NL80211_IFTYPE_UNSPECIFIED) {
402 mwifiex_dbg(priv->adapter, ERROR,
403 "do not receive mgmt frames on uninitialized intf");
404 return -1;
405 }
406
407 rx_pd = (struct rxpd *)skb->data;
408
409 skb_pull(skb, le16_to_cpu(rx_pd->rx_pkt_offset));
410 skb_pull(skb, sizeof(pkt_len));
411
412 pkt_len = le16_to_cpu(rx_pd->rx_pkt_length);
413
414 ieee_hdr = (void *)skb->data;
415 if (ieee80211_is_mgmt(ieee_hdr->frame_control)) {
416 if (mwifiex_parse_mgmt_packet(priv, (u8 *)ieee_hdr,
417 pkt_len, rx_pd))
418 return -1;
419 }
420 /* Remove address4 */
421 memmove(skb->data + sizeof(struct ieee80211_hdr_3addr),
422 skb->data + sizeof(struct ieee80211_hdr),
423 pkt_len - sizeof(struct ieee80211_hdr));
424
425 pkt_len -= ETH_ALEN + sizeof(pkt_len);
426 rx_pd->rx_pkt_length = cpu_to_le16(pkt_len);
427
428 cfg80211_rx_mgmt(&priv->wdev, priv->roc_cfg.chan.center_freq,
429 CAL_RSSI(rx_pd->snr, rx_pd->nf), skb->data, pkt_len,
430 0);
431
432 return 0;
433 }
434
435 /*
436 * This function processes the received packet before sending it to the
437 * kernel.
438 *
439 * It extracts the SKB from the received buffer and sends it to kernel.
440 * In case the received buffer does not contain the data in SKB format,
441 * the function creates a blank SKB, fills it with the data from the
442 * received buffer and then sends this new SKB to the kernel.
443 */
mwifiex_recv_packet(struct mwifiex_private * priv,struct sk_buff * skb)444 int mwifiex_recv_packet(struct mwifiex_private *priv, struct sk_buff *skb)
445 {
446 struct mwifiex_sta_node *src_node;
447 struct ethhdr *p_ethhdr;
448
449 if (!skb)
450 return -1;
451
452 priv->stats.rx_bytes += skb->len;
453 priv->stats.rx_packets++;
454
455 if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_UAP) {
456 p_ethhdr = (void *)skb->data;
457 src_node = mwifiex_get_sta_entry(priv, p_ethhdr->h_source);
458 if (src_node) {
459 src_node->stats.last_rx = jiffies;
460 src_node->stats.rx_bytes += skb->len;
461 src_node->stats.rx_packets++;
462 }
463 }
464
465 skb->dev = priv->netdev;
466 skb->protocol = eth_type_trans(skb, priv->netdev);
467 skb->ip_summed = CHECKSUM_NONE;
468
469 /* This is required only in case of 11n and USB/PCIE as we alloc
470 * a buffer of 4K only if its 11N (to be able to receive 4K
471 * AMSDU packets). In case of SD we allocate buffers based
472 * on the size of packet and hence this is not needed.
473 *
474 * Modifying the truesize here as our allocation for each
475 * skb is 4K but we only receive 2K packets and this cause
476 * the kernel to start dropping packets in case where
477 * application has allocated buffer based on 2K size i.e.
478 * if there a 64K packet received (in IP fragments and
479 * application allocates 64K to receive this packet but
480 * this packet would almost double up because we allocate
481 * each 1.5K fragment in 4K and pass it up. As soon as the
482 * 64K limit hits kernel will start to drop rest of the
483 * fragments. Currently we fail the Filesndl-ht.scr script
484 * for UDP, hence this fix
485 */
486 if ((priv->adapter->iface_type == MWIFIEX_USB ||
487 priv->adapter->iface_type == MWIFIEX_PCIE) &&
488 (skb->truesize > MWIFIEX_RX_DATA_BUF_SIZE))
489 skb->truesize += (skb->len - MWIFIEX_RX_DATA_BUF_SIZE);
490
491 netif_rx(skb);
492 return 0;
493 }
494
495 /*
496 * IOCTL completion callback handler.
497 *
498 * This function is called when a pending IOCTL is completed.
499 *
500 * If work queue support is enabled, the function wakes up the
501 * corresponding waiting function. Otherwise, it processes the
502 * IOCTL response and frees the response buffer.
503 */
mwifiex_complete_cmd(struct mwifiex_adapter * adapter,struct cmd_ctrl_node * cmd_node)504 int mwifiex_complete_cmd(struct mwifiex_adapter *adapter,
505 struct cmd_ctrl_node *cmd_node)
506 {
507 WARN_ON(!cmd_node->wait_q_enabled);
508 mwifiex_dbg(adapter, CMD, "cmd completed: status=%d\n",
509 adapter->cmd_wait_q.status);
510
511 *cmd_node->condition = true;
512 wake_up_interruptible(&adapter->cmd_wait_q.wait);
513
514 return 0;
515 }
516
517 /* This function will return the pointer to station entry in station list
518 * table which matches specified mac address.
519 * This function should be called after acquiring RA list spinlock.
520 * NULL is returned if station entry is not found in associated STA list.
521 */
522 struct mwifiex_sta_node *
mwifiex_get_sta_entry(struct mwifiex_private * priv,const u8 * mac)523 mwifiex_get_sta_entry(struct mwifiex_private *priv, const u8 *mac)
524 {
525 struct mwifiex_sta_node *node;
526
527 if (!mac)
528 return NULL;
529
530 list_for_each_entry(node, &priv->sta_list, list) {
531 if (!memcmp(node->mac_addr, mac, ETH_ALEN))
532 return node;
533 }
534
535 return NULL;
536 }
537
538 static struct mwifiex_sta_node *
mwifiex_get_tdls_sta_entry(struct mwifiex_private * priv,u8 status)539 mwifiex_get_tdls_sta_entry(struct mwifiex_private *priv, u8 status)
540 {
541 struct mwifiex_sta_node *node;
542
543 list_for_each_entry(node, &priv->sta_list, list) {
544 if (node->tdls_status == status)
545 return node;
546 }
547
548 return NULL;
549 }
550
551 /* If tdls channel switching is on-going, tx data traffic should be
552 * blocked until the switching stage completed.
553 */
mwifiex_is_tdls_chan_switching(struct mwifiex_private * priv)554 u8 mwifiex_is_tdls_chan_switching(struct mwifiex_private *priv)
555 {
556 struct mwifiex_sta_node *sta_ptr;
557
558 if (!priv || !ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info))
559 return false;
560
561 sta_ptr = mwifiex_get_tdls_sta_entry(priv, TDLS_CHAN_SWITCHING);
562 if (sta_ptr)
563 return true;
564
565 return false;
566 }
567
mwifiex_is_tdls_off_chan(struct mwifiex_private * priv)568 u8 mwifiex_is_tdls_off_chan(struct mwifiex_private *priv)
569 {
570 struct mwifiex_sta_node *sta_ptr;
571
572 if (!priv || !ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info))
573 return false;
574
575 sta_ptr = mwifiex_get_tdls_sta_entry(priv, TDLS_IN_OFF_CHAN);
576 if (sta_ptr)
577 return true;
578
579 return false;
580 }
581
582 /* If tdls channel switching is on-going or tdls operate on off-channel,
583 * cmd path should be blocked until tdls switched to base-channel.
584 */
mwifiex_is_send_cmd_allowed(struct mwifiex_private * priv)585 u8 mwifiex_is_send_cmd_allowed(struct mwifiex_private *priv)
586 {
587 if (!priv || !ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info))
588 return true;
589
590 if (mwifiex_is_tdls_chan_switching(priv) ||
591 mwifiex_is_tdls_off_chan(priv))
592 return false;
593
594 return true;
595 }
596
597 /* This function will add a sta_node entry to associated station list
598 * table with the given mac address.
599 * If entry exist already, existing entry is returned.
600 * If received mac address is NULL, NULL is returned.
601 */
602 struct mwifiex_sta_node *
mwifiex_add_sta_entry(struct mwifiex_private * priv,const u8 * mac)603 mwifiex_add_sta_entry(struct mwifiex_private *priv, const u8 *mac)
604 {
605 struct mwifiex_sta_node *node;
606
607 if (!mac)
608 return NULL;
609
610 spin_lock_bh(&priv->sta_list_spinlock);
611 node = mwifiex_get_sta_entry(priv, mac);
612 if (node)
613 goto done;
614
615 node = kzalloc(sizeof(*node), GFP_ATOMIC);
616 if (!node)
617 goto done;
618
619 memcpy(node->mac_addr, mac, ETH_ALEN);
620 list_add_tail(&node->list, &priv->sta_list);
621
622 done:
623 spin_unlock_bh(&priv->sta_list_spinlock);
624 return node;
625 }
626
627 /* This function will search for HT IE in association request IEs
628 * and set station HT parameters accordingly.
629 */
630 void
mwifiex_set_sta_ht_cap(struct mwifiex_private * priv,const u8 * ies,int ies_len,struct mwifiex_sta_node * node)631 mwifiex_set_sta_ht_cap(struct mwifiex_private *priv, const u8 *ies,
632 int ies_len, struct mwifiex_sta_node *node)
633 {
634 struct ieee_types_header *ht_cap_ie;
635 const struct ieee80211_ht_cap *ht_cap;
636
637 if (!ies)
638 return;
639
640 ht_cap_ie = (void *)cfg80211_find_ie(WLAN_EID_HT_CAPABILITY, ies,
641 ies_len);
642 if (ht_cap_ie) {
643 ht_cap = (void *)(ht_cap_ie + 1);
644 node->is_11n_enabled = 1;
645 node->max_amsdu = le16_to_cpu(ht_cap->cap_info) &
646 IEEE80211_HT_CAP_MAX_AMSDU ?
647 MWIFIEX_TX_DATA_BUF_SIZE_8K :
648 MWIFIEX_TX_DATA_BUF_SIZE_4K;
649 } else {
650 node->is_11n_enabled = 0;
651 }
652
653 return;
654 }
655
656 /* This function will delete a station entry from station list */
mwifiex_del_sta_entry(struct mwifiex_private * priv,const u8 * mac)657 void mwifiex_del_sta_entry(struct mwifiex_private *priv, const u8 *mac)
658 {
659 struct mwifiex_sta_node *node;
660
661 spin_lock_bh(&priv->sta_list_spinlock);
662
663 node = mwifiex_get_sta_entry(priv, mac);
664 if (node) {
665 list_del(&node->list);
666 kfree(node);
667 }
668
669 spin_unlock_bh(&priv->sta_list_spinlock);
670 return;
671 }
672
673 /* This function will delete all stations from associated station list. */
mwifiex_del_all_sta_list(struct mwifiex_private * priv)674 void mwifiex_del_all_sta_list(struct mwifiex_private *priv)
675 {
676 struct mwifiex_sta_node *node, *tmp;
677
678 spin_lock_bh(&priv->sta_list_spinlock);
679
680 list_for_each_entry_safe(node, tmp, &priv->sta_list, list) {
681 list_del(&node->list);
682 kfree(node);
683 }
684
685 INIT_LIST_HEAD(&priv->sta_list);
686 spin_unlock_bh(&priv->sta_list_spinlock);
687 return;
688 }
689
690 /* This function adds histogram data to histogram array*/
mwifiex_hist_data_add(struct mwifiex_private * priv,u8 rx_rate,s8 snr,s8 nflr)691 void mwifiex_hist_data_add(struct mwifiex_private *priv,
692 u8 rx_rate, s8 snr, s8 nflr)
693 {
694 struct mwifiex_histogram_data *phist_data = priv->hist_data;
695
696 if (atomic_read(&phist_data->num_samples) > MWIFIEX_HIST_MAX_SAMPLES)
697 mwifiex_hist_data_reset(priv);
698 mwifiex_hist_data_set(priv, rx_rate, snr, nflr);
699 }
700
701 /* function to add histogram record */
mwifiex_hist_data_set(struct mwifiex_private * priv,u8 rx_rate,s8 snr,s8 nflr)702 void mwifiex_hist_data_set(struct mwifiex_private *priv, u8 rx_rate, s8 snr,
703 s8 nflr)
704 {
705 struct mwifiex_histogram_data *phist_data = priv->hist_data;
706 s8 nf = -nflr;
707 s8 rssi = snr - nflr;
708
709 atomic_inc(&phist_data->num_samples);
710 atomic_inc(&phist_data->rx_rate[rx_rate]);
711 atomic_inc(&phist_data->snr[snr + 128]);
712 atomic_inc(&phist_data->noise_flr[nf + 128]);
713 atomic_inc(&phist_data->sig_str[rssi + 128]);
714 }
715
716 /* function to reset histogram data during init/reset */
mwifiex_hist_data_reset(struct mwifiex_private * priv)717 void mwifiex_hist_data_reset(struct mwifiex_private *priv)
718 {
719 int ix;
720 struct mwifiex_histogram_data *phist_data = priv->hist_data;
721
722 atomic_set(&phist_data->num_samples, 0);
723 for (ix = 0; ix < MWIFIEX_MAX_AC_RX_RATES; ix++)
724 atomic_set(&phist_data->rx_rate[ix], 0);
725 for (ix = 0; ix < MWIFIEX_MAX_SNR; ix++)
726 atomic_set(&phist_data->snr[ix], 0);
727 for (ix = 0; ix < MWIFIEX_MAX_NOISE_FLR; ix++)
728 atomic_set(&phist_data->noise_flr[ix], 0);
729 for (ix = 0; ix < MWIFIEX_MAX_SIG_STRENGTH; ix++)
730 atomic_set(&phist_data->sig_str[ix], 0);
731 }
732
mwifiex_alloc_dma_align_buf(int rx_len,gfp_t flags)733 void *mwifiex_alloc_dma_align_buf(int rx_len, gfp_t flags)
734 {
735 struct sk_buff *skb;
736 int buf_len, pad;
737
738 buf_len = rx_len + MWIFIEX_RX_HEADROOM + MWIFIEX_DMA_ALIGN_SZ;
739
740 skb = __dev_alloc_skb(buf_len, flags);
741
742 if (!skb)
743 return NULL;
744
745 skb_reserve(skb, MWIFIEX_RX_HEADROOM);
746
747 pad = MWIFIEX_ALIGN_ADDR(skb->data, MWIFIEX_DMA_ALIGN_SZ) -
748 (long)skb->data;
749
750 skb_reserve(skb, pad);
751
752 return skb;
753 }
754 EXPORT_SYMBOL_GPL(mwifiex_alloc_dma_align_buf);
755
mwifiex_fw_dump_event(struct mwifiex_private * priv)756 void mwifiex_fw_dump_event(struct mwifiex_private *priv)
757 {
758 mwifiex_send_cmd(priv, HostCmd_CMD_FW_DUMP_EVENT, HostCmd_ACT_GEN_SET,
759 0, NULL, true);
760 }
761 EXPORT_SYMBOL_GPL(mwifiex_fw_dump_event);
762