1 /*
2 * Marvell Wireless LAN device driver: utility functions
3 *
4 * Copyright (C) 2011-2014, Marvell International Ltd.
5 *
6 * This software file (the "File") is distributed by Marvell International
7 * Ltd. 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 {"int_counter", item_size(int_counter),
30 item_addr(int_counter), 1},
31 {"wmm_ac_vo", item_size(packets_out[WMM_AC_VO]),
32 item_addr(packets_out[WMM_AC_VO]), 1},
33 {"wmm_ac_vi", item_size(packets_out[WMM_AC_VI]),
34 item_addr(packets_out[WMM_AC_VI]), 1},
35 {"wmm_ac_be", item_size(packets_out[WMM_AC_BE]),
36 item_addr(packets_out[WMM_AC_BE]), 1},
37 {"wmm_ac_bk", item_size(packets_out[WMM_AC_BK]),
38 item_addr(packets_out[WMM_AC_BK]), 1},
39 {"tx_buf_size", item_size(tx_buf_size),
40 item_addr(tx_buf_size), 1},
41 {"curr_tx_buf_size", item_size(curr_tx_buf_size),
42 item_addr(curr_tx_buf_size), 1},
43 {"ps_mode", item_size(ps_mode),
44 item_addr(ps_mode), 1},
45 {"ps_state", item_size(ps_state),
46 item_addr(ps_state), 1},
47 {"is_deep_sleep", item_size(is_deep_sleep),
48 item_addr(is_deep_sleep), 1},
49 {"wakeup_dev_req", item_size(pm_wakeup_card_req),
50 item_addr(pm_wakeup_card_req), 1},
51 {"wakeup_tries", item_size(pm_wakeup_fw_try),
52 item_addr(pm_wakeup_fw_try), 1},
53 {"hs_configured", item_size(is_hs_configured),
54 item_addr(is_hs_configured), 1},
55 {"hs_activated", item_size(hs_activated),
56 item_addr(hs_activated), 1},
57 {"num_tx_timeout", item_size(num_tx_timeout),
58 item_addr(num_tx_timeout), 1},
59 {"is_cmd_timedout", item_size(is_cmd_timedout),
60 item_addr(is_cmd_timedout), 1},
61 {"timeout_cmd_id", item_size(timeout_cmd_id),
62 item_addr(timeout_cmd_id), 1},
63 {"timeout_cmd_act", item_size(timeout_cmd_act),
64 item_addr(timeout_cmd_act), 1},
65 {"last_cmd_id", item_size(last_cmd_id),
66 item_addr(last_cmd_id), DBG_CMD_NUM},
67 {"last_cmd_act", item_size(last_cmd_act),
68 item_addr(last_cmd_act), DBG_CMD_NUM},
69 {"last_cmd_index", item_size(last_cmd_index),
70 item_addr(last_cmd_index), 1},
71 {"last_cmd_resp_id", item_size(last_cmd_resp_id),
72 item_addr(last_cmd_resp_id), DBG_CMD_NUM},
73 {"last_cmd_resp_index", item_size(last_cmd_resp_index),
74 item_addr(last_cmd_resp_index), 1},
75 {"last_event", item_size(last_event),
76 item_addr(last_event), DBG_CMD_NUM},
77 {"last_event_index", item_size(last_event_index),
78 item_addr(last_event_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 adapter->init_wait_q_woken = true;
128 wake_up_interruptible(&adapter->init_wait_q);
129 return 0;
130 }
131
132 /*
133 * Firmware shutdown complete callback handler.
134 *
135 * This function sets the hardware status to not ready and wakes up
136 * the function waiting on the init wait queue for the firmware
137 * shutdown to complete.
138 */
mwifiex_shutdown_fw_complete(struct mwifiex_adapter * adapter)139 int mwifiex_shutdown_fw_complete(struct mwifiex_adapter *adapter)
140 {
141 adapter->hw_status = MWIFIEX_HW_STATUS_NOT_READY;
142 adapter->init_wait_q_woken = true;
143 wake_up_interruptible(&adapter->init_wait_q);
144 return 0;
145 }
146
147 /*
148 * This function sends init/shutdown command
149 * to firmware.
150 */
mwifiex_init_shutdown_fw(struct mwifiex_private * priv,u32 func_init_shutdown)151 int mwifiex_init_shutdown_fw(struct mwifiex_private *priv,
152 u32 func_init_shutdown)
153 {
154 u16 cmd;
155
156 if (func_init_shutdown == MWIFIEX_FUNC_INIT) {
157 cmd = HostCmd_CMD_FUNC_INIT;
158 } else if (func_init_shutdown == MWIFIEX_FUNC_SHUTDOWN) {
159 cmd = HostCmd_CMD_FUNC_SHUTDOWN;
160 } else {
161 dev_err(priv->adapter->dev, "unsupported parameter\n");
162 return -1;
163 }
164
165 return mwifiex_send_cmd(priv, cmd, HostCmd_ACT_GEN_SET, 0, NULL, true);
166 }
167 EXPORT_SYMBOL_GPL(mwifiex_init_shutdown_fw);
168
169 /*
170 * IOCTL request handler to set/get debug information.
171 *
172 * This function collates/sets the information from/to different driver
173 * structures.
174 */
mwifiex_get_debug_info(struct mwifiex_private * priv,struct mwifiex_debug_info * info)175 int mwifiex_get_debug_info(struct mwifiex_private *priv,
176 struct mwifiex_debug_info *info)
177 {
178 struct mwifiex_adapter *adapter = priv->adapter;
179
180 if (info) {
181 memcpy(info->packets_out,
182 priv->wmm.packets_out,
183 sizeof(priv->wmm.packets_out));
184 info->curr_tx_buf_size = (u32) adapter->curr_tx_buf_size;
185 info->tx_buf_size = (u32) adapter->tx_buf_size;
186 info->rx_tbl_num = mwifiex_get_rx_reorder_tbl(priv,
187 info->rx_tbl);
188 info->tx_tbl_num = mwifiex_get_tx_ba_stream_tbl(priv,
189 info->tx_tbl);
190 info->tdls_peer_num = mwifiex_get_tdls_list(priv,
191 info->tdls_list);
192 info->ps_mode = adapter->ps_mode;
193 info->ps_state = adapter->ps_state;
194 info->is_deep_sleep = adapter->is_deep_sleep;
195 info->pm_wakeup_card_req = adapter->pm_wakeup_card_req;
196 info->pm_wakeup_fw_try = adapter->pm_wakeup_fw_try;
197 info->is_hs_configured = adapter->is_hs_configured;
198 info->hs_activated = adapter->hs_activated;
199 info->is_cmd_timedout = adapter->is_cmd_timedout;
200 info->num_cmd_host_to_card_failure
201 = adapter->dbg.num_cmd_host_to_card_failure;
202 info->num_cmd_sleep_cfm_host_to_card_failure
203 = adapter->dbg.num_cmd_sleep_cfm_host_to_card_failure;
204 info->num_tx_host_to_card_failure
205 = adapter->dbg.num_tx_host_to_card_failure;
206 info->num_event_deauth = adapter->dbg.num_event_deauth;
207 info->num_event_disassoc = adapter->dbg.num_event_disassoc;
208 info->num_event_link_lost = adapter->dbg.num_event_link_lost;
209 info->num_cmd_deauth = adapter->dbg.num_cmd_deauth;
210 info->num_cmd_assoc_success =
211 adapter->dbg.num_cmd_assoc_success;
212 info->num_cmd_assoc_failure =
213 adapter->dbg.num_cmd_assoc_failure;
214 info->num_tx_timeout = adapter->dbg.num_tx_timeout;
215 info->timeout_cmd_id = adapter->dbg.timeout_cmd_id;
216 info->timeout_cmd_act = adapter->dbg.timeout_cmd_act;
217 memcpy(info->last_cmd_id, adapter->dbg.last_cmd_id,
218 sizeof(adapter->dbg.last_cmd_id));
219 memcpy(info->last_cmd_act, adapter->dbg.last_cmd_act,
220 sizeof(adapter->dbg.last_cmd_act));
221 info->last_cmd_index = adapter->dbg.last_cmd_index;
222 memcpy(info->last_cmd_resp_id, adapter->dbg.last_cmd_resp_id,
223 sizeof(adapter->dbg.last_cmd_resp_id));
224 info->last_cmd_resp_index = adapter->dbg.last_cmd_resp_index;
225 memcpy(info->last_event, adapter->dbg.last_event,
226 sizeof(adapter->dbg.last_event));
227 info->last_event_index = adapter->dbg.last_event_index;
228 info->data_sent = adapter->data_sent;
229 info->cmd_sent = adapter->cmd_sent;
230 info->cmd_resp_received = adapter->cmd_resp_received;
231 }
232
233 return 0;
234 }
235
mwifiex_debug_info_to_buffer(struct mwifiex_private * priv,char * buf,struct mwifiex_debug_info * info)236 int mwifiex_debug_info_to_buffer(struct mwifiex_private *priv, char *buf,
237 struct mwifiex_debug_info *info)
238 {
239 char *p = buf;
240 struct mwifiex_debug_data *d = &items[0];
241 size_t size, addr;
242 long val;
243 int i, j;
244
245 if (!info)
246 return 0;
247
248 for (i = 0; i < num_of_items; i++) {
249 p += sprintf(p, "%s=", d[i].name);
250
251 size = d[i].size / d[i].num;
252
253 if (i < (num_of_items - 3))
254 addr = d[i].addr + (size_t)info;
255 else /* The last 3 items are struct mwifiex_adapter variables */
256 addr = d[i].addr + (size_t)priv->adapter;
257
258 for (j = 0; j < d[i].num; j++) {
259 switch (size) {
260 case 1:
261 val = *((u8 *)addr);
262 break;
263 case 2:
264 val = *((u16 *)addr);
265 break;
266 case 4:
267 val = *((u32 *)addr);
268 break;
269 case 8:
270 val = *((long long *)addr);
271 break;
272 default:
273 val = -1;
274 break;
275 }
276
277 p += sprintf(p, "%#lx ", val);
278 addr += size;
279 }
280
281 p += sprintf(p, "\n");
282 }
283
284 if (info->tx_tbl_num) {
285 p += sprintf(p, "Tx BA stream table:\n");
286 for (i = 0; i < info->tx_tbl_num; i++)
287 p += sprintf(p, "tid = %d, ra = %pM\n",
288 info->tx_tbl[i].tid, info->tx_tbl[i].ra);
289 }
290
291 if (info->rx_tbl_num) {
292 p += sprintf(p, "Rx reorder table:\n");
293 for (i = 0; i < info->rx_tbl_num; i++) {
294 p += sprintf(p, "tid = %d, ta = %pM, ",
295 info->rx_tbl[i].tid,
296 info->rx_tbl[i].ta);
297 p += sprintf(p, "start_win = %d, ",
298 info->rx_tbl[i].start_win);
299 p += sprintf(p, "win_size = %d, buffer: ",
300 info->rx_tbl[i].win_size);
301
302 for (j = 0; j < info->rx_tbl[i].win_size; j++)
303 p += sprintf(p, "%c ",
304 info->rx_tbl[i].buffer[j] ?
305 '1' : '0');
306
307 p += sprintf(p, "\n");
308 }
309 }
310
311 if (info->tdls_peer_num) {
312 p += sprintf(p, "TDLS peer table:\n");
313 for (i = 0; i < info->tdls_peer_num; i++) {
314 p += sprintf(p, "peer = %pM",
315 info->tdls_list[i].peer_addr);
316 p += sprintf(p, "\n");
317 }
318 }
319
320 return p - buf;
321 }
322
323 static int
mwifiex_parse_mgmt_packet(struct mwifiex_private * priv,u8 * payload,u16 len,struct rxpd * rx_pd)324 mwifiex_parse_mgmt_packet(struct mwifiex_private *priv, u8 *payload, u16 len,
325 struct rxpd *rx_pd)
326 {
327 u16 stype;
328 u8 category, action_code;
329 struct ieee80211_hdr *ieee_hdr = (void *)payload;
330
331 stype = (le16_to_cpu(ieee_hdr->frame_control) & IEEE80211_FCTL_STYPE);
332
333 switch (stype) {
334 case IEEE80211_STYPE_ACTION:
335 category = *(payload + sizeof(struct ieee80211_hdr));
336 action_code = *(payload + sizeof(struct ieee80211_hdr) + 1);
337 if (category == WLAN_CATEGORY_PUBLIC &&
338 action_code == WLAN_PUB_ACTION_TDLS_DISCOVER_RES) {
339 dev_dbg(priv->adapter->dev,
340 "TDLS discovery response %pM nf=%d, snr=%d\n",
341 ieee_hdr->addr2, rx_pd->nf, rx_pd->snr);
342 mwifiex_auto_tdls_update_peer_signal(priv,
343 ieee_hdr->addr2,
344 rx_pd->snr,
345 rx_pd->nf);
346 }
347 break;
348 default:
349 dev_dbg(priv->adapter->dev,
350 "unknown mgmt frame subytpe %#x\n", stype);
351 }
352
353 return 0;
354 }
355 /*
356 * This function processes the received management packet and send it
357 * to the kernel.
358 */
359 int
mwifiex_process_mgmt_packet(struct mwifiex_private * priv,struct sk_buff * skb)360 mwifiex_process_mgmt_packet(struct mwifiex_private *priv,
361 struct sk_buff *skb)
362 {
363 struct rxpd *rx_pd;
364 u16 pkt_len;
365 struct ieee80211_hdr *ieee_hdr;
366
367 if (!skb)
368 return -1;
369
370 if (!priv->mgmt_frame_mask ||
371 priv->wdev.iftype == NL80211_IFTYPE_UNSPECIFIED) {
372 dev_dbg(priv->adapter->dev,
373 "do not receive mgmt frames on uninitialized intf");
374 return -1;
375 }
376
377 rx_pd = (struct rxpd *)skb->data;
378
379 skb_pull(skb, le16_to_cpu(rx_pd->rx_pkt_offset));
380 skb_pull(skb, sizeof(pkt_len));
381
382 pkt_len = le16_to_cpu(rx_pd->rx_pkt_length);
383
384 ieee_hdr = (void *)skb->data;
385 if (ieee80211_is_mgmt(ieee_hdr->frame_control)) {
386 mwifiex_parse_mgmt_packet(priv, (u8 *)ieee_hdr,
387 pkt_len, rx_pd);
388 }
389 /* Remove address4 */
390 memmove(skb->data + sizeof(struct ieee80211_hdr_3addr),
391 skb->data + sizeof(struct ieee80211_hdr),
392 pkt_len - sizeof(struct ieee80211_hdr));
393
394 pkt_len -= ETH_ALEN + sizeof(pkt_len);
395 rx_pd->rx_pkt_length = cpu_to_le16(pkt_len);
396
397 cfg80211_rx_mgmt(&priv->wdev, priv->roc_cfg.chan.center_freq,
398 CAL_RSSI(rx_pd->snr, rx_pd->nf), skb->data, pkt_len,
399 0);
400
401 return 0;
402 }
403
404 /*
405 * This function processes the received packet before sending it to the
406 * kernel.
407 *
408 * It extracts the SKB from the received buffer and sends it to kernel.
409 * In case the received buffer does not contain the data in SKB format,
410 * the function creates a blank SKB, fills it with the data from the
411 * received buffer and then sends this new SKB to the kernel.
412 */
mwifiex_recv_packet(struct mwifiex_private * priv,struct sk_buff * skb)413 int mwifiex_recv_packet(struct mwifiex_private *priv, struct sk_buff *skb)
414 {
415 if (!skb)
416 return -1;
417
418 priv->stats.rx_bytes += skb->len;
419 priv->stats.rx_packets++;
420
421 skb->dev = priv->netdev;
422 skb->protocol = eth_type_trans(skb, priv->netdev);
423 skb->ip_summed = CHECKSUM_NONE;
424
425 /* This is required only in case of 11n and USB/PCIE as we alloc
426 * a buffer of 4K only if its 11N (to be able to receive 4K
427 * AMSDU packets). In case of SD we allocate buffers based
428 * on the size of packet and hence this is not needed.
429 *
430 * Modifying the truesize here as our allocation for each
431 * skb is 4K but we only receive 2K packets and this cause
432 * the kernel to start dropping packets in case where
433 * application has allocated buffer based on 2K size i.e.
434 * if there a 64K packet received (in IP fragments and
435 * application allocates 64K to receive this packet but
436 * this packet would almost double up because we allocate
437 * each 1.5K fragment in 4K and pass it up. As soon as the
438 * 64K limit hits kernel will start to drop rest of the
439 * fragments. Currently we fail the Filesndl-ht.scr script
440 * for UDP, hence this fix
441 */
442 if ((priv->adapter->iface_type == MWIFIEX_USB ||
443 priv->adapter->iface_type == MWIFIEX_PCIE) &&
444 (skb->truesize > MWIFIEX_RX_DATA_BUF_SIZE))
445 skb->truesize += (skb->len - MWIFIEX_RX_DATA_BUF_SIZE);
446
447 if (in_interrupt())
448 netif_rx(skb);
449 else
450 netif_rx_ni(skb);
451
452 return 0;
453 }
454
455 /*
456 * IOCTL completion callback handler.
457 *
458 * This function is called when a pending IOCTL is completed.
459 *
460 * If work queue support is enabled, the function wakes up the
461 * corresponding waiting function. Otherwise, it processes the
462 * IOCTL response and frees the response buffer.
463 */
mwifiex_complete_cmd(struct mwifiex_adapter * adapter,struct cmd_ctrl_node * cmd_node)464 int mwifiex_complete_cmd(struct mwifiex_adapter *adapter,
465 struct cmd_ctrl_node *cmd_node)
466 {
467 dev_dbg(adapter->dev, "cmd completed: status=%d\n",
468 adapter->cmd_wait_q.status);
469
470 *(cmd_node->condition) = true;
471
472 if (adapter->cmd_wait_q.status == -ETIMEDOUT)
473 dev_err(adapter->dev, "cmd timeout\n");
474 else
475 wake_up_interruptible(&adapter->cmd_wait_q.wait);
476
477 return 0;
478 }
479
480 /* This function will return the pointer to station entry in station list
481 * table which matches specified mac address.
482 * This function should be called after acquiring RA list spinlock.
483 * NULL is returned if station entry is not found in associated STA list.
484 */
485 struct mwifiex_sta_node *
mwifiex_get_sta_entry(struct mwifiex_private * priv,const u8 * mac)486 mwifiex_get_sta_entry(struct mwifiex_private *priv, const u8 *mac)
487 {
488 struct mwifiex_sta_node *node;
489
490 if (!mac)
491 return NULL;
492
493 list_for_each_entry(node, &priv->sta_list, list) {
494 if (!memcmp(node->mac_addr, mac, ETH_ALEN))
495 return node;
496 }
497
498 return NULL;
499 }
500
501 /* This function will add a sta_node entry to associated station list
502 * table with the given mac address.
503 * If entry exist already, existing entry is returned.
504 * If received mac address is NULL, NULL is returned.
505 */
506 struct mwifiex_sta_node *
mwifiex_add_sta_entry(struct mwifiex_private * priv,const u8 * mac)507 mwifiex_add_sta_entry(struct mwifiex_private *priv, const u8 *mac)
508 {
509 struct mwifiex_sta_node *node;
510 unsigned long flags;
511
512 if (!mac)
513 return NULL;
514
515 spin_lock_irqsave(&priv->sta_list_spinlock, flags);
516 node = mwifiex_get_sta_entry(priv, mac);
517 if (node)
518 goto done;
519
520 node = kzalloc(sizeof(*node), GFP_ATOMIC);
521 if (!node)
522 goto done;
523
524 memcpy(node->mac_addr, mac, ETH_ALEN);
525 list_add_tail(&node->list, &priv->sta_list);
526
527 done:
528 spin_unlock_irqrestore(&priv->sta_list_spinlock, flags);
529 return node;
530 }
531
532 /* This function will search for HT IE in association request IEs
533 * and set station HT parameters accordingly.
534 */
535 void
mwifiex_set_sta_ht_cap(struct mwifiex_private * priv,const u8 * ies,int ies_len,struct mwifiex_sta_node * node)536 mwifiex_set_sta_ht_cap(struct mwifiex_private *priv, const u8 *ies,
537 int ies_len, struct mwifiex_sta_node *node)
538 {
539 const struct ieee80211_ht_cap *ht_cap;
540
541 if (!ies)
542 return;
543
544 ht_cap = (void *)cfg80211_find_ie(WLAN_EID_HT_CAPABILITY, ies, ies_len);
545 if (ht_cap) {
546 node->is_11n_enabled = 1;
547 node->max_amsdu = le16_to_cpu(ht_cap->cap_info) &
548 IEEE80211_HT_CAP_MAX_AMSDU ?
549 MWIFIEX_TX_DATA_BUF_SIZE_8K :
550 MWIFIEX_TX_DATA_BUF_SIZE_4K;
551 } else {
552 node->is_11n_enabled = 0;
553 }
554
555 return;
556 }
557
558 /* This function will delete a station entry from station list */
mwifiex_del_sta_entry(struct mwifiex_private * priv,const u8 * mac)559 void mwifiex_del_sta_entry(struct mwifiex_private *priv, const u8 *mac)
560 {
561 struct mwifiex_sta_node *node;
562 unsigned long flags;
563
564 spin_lock_irqsave(&priv->sta_list_spinlock, flags);
565
566 node = mwifiex_get_sta_entry(priv, mac);
567 if (node) {
568 list_del(&node->list);
569 kfree(node);
570 }
571
572 spin_unlock_irqrestore(&priv->sta_list_spinlock, flags);
573 return;
574 }
575
576 /* This function will delete all stations from associated station list. */
mwifiex_del_all_sta_list(struct mwifiex_private * priv)577 void mwifiex_del_all_sta_list(struct mwifiex_private *priv)
578 {
579 struct mwifiex_sta_node *node, *tmp;
580 unsigned long flags;
581
582 spin_lock_irqsave(&priv->sta_list_spinlock, flags);
583
584 list_for_each_entry_safe(node, tmp, &priv->sta_list, list) {
585 list_del(&node->list);
586 kfree(node);
587 }
588
589 INIT_LIST_HEAD(&priv->sta_list);
590 spin_unlock_irqrestore(&priv->sta_list_spinlock, flags);
591 return;
592 }
593
594 /* This function adds histogram data to histogram array*/
mwifiex_hist_data_add(struct mwifiex_private * priv,u8 rx_rate,s8 snr,s8 nflr)595 void mwifiex_hist_data_add(struct mwifiex_private *priv,
596 u8 rx_rate, s8 snr, s8 nflr)
597 {
598 struct mwifiex_histogram_data *phist_data = priv->hist_data;
599
600 if (atomic_read(&phist_data->num_samples) > MWIFIEX_HIST_MAX_SAMPLES)
601 mwifiex_hist_data_reset(priv);
602 mwifiex_hist_data_set(priv, rx_rate, snr, nflr);
603 }
604
605 /* function to add histogram record */
mwifiex_hist_data_set(struct mwifiex_private * priv,u8 rx_rate,s8 snr,s8 nflr)606 void mwifiex_hist_data_set(struct mwifiex_private *priv, u8 rx_rate, s8 snr,
607 s8 nflr)
608 {
609 struct mwifiex_histogram_data *phist_data = priv->hist_data;
610
611 atomic_inc(&phist_data->num_samples);
612 atomic_inc(&phist_data->rx_rate[rx_rate]);
613 atomic_inc(&phist_data->snr[snr]);
614 atomic_inc(&phist_data->noise_flr[128 + nflr]);
615 atomic_inc(&phist_data->sig_str[nflr - snr]);
616 }
617
618 /* function to reset histogram data during init/reset */
mwifiex_hist_data_reset(struct mwifiex_private * priv)619 void mwifiex_hist_data_reset(struct mwifiex_private *priv)
620 {
621 int ix;
622 struct mwifiex_histogram_data *phist_data = priv->hist_data;
623
624 atomic_set(&phist_data->num_samples, 0);
625 for (ix = 0; ix < MWIFIEX_MAX_AC_RX_RATES; ix++)
626 atomic_set(&phist_data->rx_rate[ix], 0);
627 for (ix = 0; ix < MWIFIEX_MAX_SNR; ix++)
628 atomic_set(&phist_data->snr[ix], 0);
629 for (ix = 0; ix < MWIFIEX_MAX_NOISE_FLR; ix++)
630 atomic_set(&phist_data->noise_flr[ix], 0);
631 for (ix = 0; ix < MWIFIEX_MAX_SIG_STRENGTH; ix++)
632 atomic_set(&phist_data->sig_str[ix], 0);
633 }
634
mwifiex_alloc_dma_align_buf(int rx_len,gfp_t flags)635 void *mwifiex_alloc_dma_align_buf(int rx_len, gfp_t flags)
636 {
637 struct sk_buff *skb;
638 int buf_len, pad;
639
640 buf_len = rx_len + MWIFIEX_RX_HEADROOM + MWIFIEX_DMA_ALIGN_SZ;
641
642 skb = __dev_alloc_skb(buf_len, flags);
643
644 if (!skb)
645 return NULL;
646
647 skb_reserve(skb, MWIFIEX_RX_HEADROOM);
648
649 pad = MWIFIEX_ALIGN_ADDR(skb->data, MWIFIEX_DMA_ALIGN_SZ) -
650 (long)skb->data;
651
652 skb_reserve(skb, pad);
653
654 return skb;
655 }
656 EXPORT_SYMBOL_GPL(mwifiex_alloc_dma_align_buf);
657