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
 16static 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
116static 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 */
124int 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 */
140int 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}
157EXPORT_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 */
165int 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
239int 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
326static int
327mwifiex_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 */
377int
378mwifiex_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 */
436int 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 */
496int 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 */
514struct mwifiex_sta_node *
515mwifiex_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
530static struct mwifiex_sta_node *
531mwifiex_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 */
546u8 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
560u8 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 */
577u8 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 */
594struct mwifiex_sta_node *
595mwifiex_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
614done:
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 */
622void
623mwifiex_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 */
649void 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. */
666void 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*/
683void 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 */
694void 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 */
709void 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
725void *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}
746EXPORT_SYMBOL_GPL(mwifiex_alloc_dma_align_buf);
747
748void 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}
753EXPORT_SYMBOL_GPL(mwifiex_fw_dump_event);