1 /*
2  * Marvell Wireless LAN device driver: 802.11n
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 /*
29  * Fills HT capability information field, AMPDU Parameters field, HT extended
30  * capability field, and supported MCS set fields.
31  *
32  * HT capability information field, AMPDU Parameters field, supported MCS set
33  * fields are retrieved from cfg80211 stack
34  *
35  * RD responder bit to set to clear in the extended capability header.
36  */
37 int mwifiex_fill_cap_info(struct mwifiex_private *priv, u8 radio_type,
38 			  struct ieee80211_ht_cap *ht_cap)
39 {
40 	uint16_t ht_ext_cap = le16_to_cpu(ht_cap->extended_ht_cap_info);
41 	struct ieee80211_supported_band *sband =
42 					priv->wdev.wiphy->bands[radio_type];
43 
44 	if (WARN_ON_ONCE(!sband)) {
45 		mwifiex_dbg(priv->adapter, ERROR, "Invalid radio type!\n");
46 		return -EINVAL;
47 	}
48 
49 	ht_cap->ampdu_params_info =
50 		(sband->ht_cap.ampdu_factor &
51 		 IEEE80211_HT_AMPDU_PARM_FACTOR) |
52 		((sband->ht_cap.ampdu_density <<
53 		 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT) &
54 		 IEEE80211_HT_AMPDU_PARM_DENSITY);
55 
56 	memcpy((u8 *)&ht_cap->mcs, &sband->ht_cap.mcs,
57 	       sizeof(sband->ht_cap.mcs));
58 
59 	if (priv->bss_mode == NL80211_IFTYPE_STATION ||
60 	    (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
61 	     (priv->adapter->sec_chan_offset !=
62 					IEEE80211_HT_PARAM_CHA_SEC_NONE)))
63 		/* Set MCS32 for infra mode or ad-hoc mode with 40MHz support */
64 		SETHT_MCS32(ht_cap->mcs.rx_mask);
65 
66 	/* Clear RD responder bit */
67 	ht_ext_cap &= ~IEEE80211_HT_EXT_CAP_RD_RESPONDER;
68 
69 	ht_cap->cap_info = cpu_to_le16(sband->ht_cap.cap);
70 	ht_cap->extended_ht_cap_info = cpu_to_le16(ht_ext_cap);
71 
72 	if (ISSUPP_BEAMFORMING(priv->adapter->hw_dot_11n_dev_cap))
73 		ht_cap->tx_BF_cap_info = cpu_to_le32(MWIFIEX_DEF_11N_TX_BF_CAP);
74 
75 	return 0;
76 }
77 
78 /*
79  * This function returns the pointer to an entry in BA Stream
80  * table which matches the requested BA status.
81  */
82 static struct mwifiex_tx_ba_stream_tbl *
83 mwifiex_get_ba_status(struct mwifiex_private *priv,
84 		      enum mwifiex_ba_status ba_status)
85 {
86 	struct mwifiex_tx_ba_stream_tbl *tx_ba_tsr_tbl;
87 	unsigned long flags;
88 
89 	spin_lock_irqsave(&priv->tx_ba_stream_tbl_lock, flags);
90 	list_for_each_entry(tx_ba_tsr_tbl, &priv->tx_ba_stream_tbl_ptr, list) {
91 		if (tx_ba_tsr_tbl->ba_status == ba_status) {
92 			spin_unlock_irqrestore(&priv->tx_ba_stream_tbl_lock,
93 					       flags);
94 			return tx_ba_tsr_tbl;
95 		}
96 	}
97 	spin_unlock_irqrestore(&priv->tx_ba_stream_tbl_lock, flags);
98 	return NULL;
99 }
100 
101 /*
102  * This function handles the command response of delete a block
103  * ack request.
104  *
105  * The function checks the response success status and takes action
106  * accordingly (send an add BA request in case of success, or recreate
107  * the deleted stream in case of failure, if the add BA was also
108  * initiated by us).
109  */
110 int mwifiex_ret_11n_delba(struct mwifiex_private *priv,
111 			  struct host_cmd_ds_command *resp)
112 {
113 	int tid;
114 	struct mwifiex_tx_ba_stream_tbl *tx_ba_tbl;
115 	struct host_cmd_ds_11n_delba *del_ba = &resp->params.del_ba;
116 	uint16_t del_ba_param_set = le16_to_cpu(del_ba->del_ba_param_set);
117 
118 	tid = del_ba_param_set >> DELBA_TID_POS;
119 	if (del_ba->del_result == BA_RESULT_SUCCESS) {
120 		mwifiex_del_ba_tbl(priv, tid, del_ba->peer_mac_addr,
121 				   TYPE_DELBA_SENT,
122 				   INITIATOR_BIT(del_ba_param_set));
123 
124 		tx_ba_tbl = mwifiex_get_ba_status(priv, BA_SETUP_INPROGRESS);
125 		if (tx_ba_tbl)
126 			mwifiex_send_addba(priv, tx_ba_tbl->tid,
127 					   tx_ba_tbl->ra);
128 	} else { /*
129 		  * In case of failure, recreate the deleted stream in case
130 		  * we initiated the ADDBA
131 		  */
132 		if (!INITIATOR_BIT(del_ba_param_set))
133 			return 0;
134 
135 		mwifiex_create_ba_tbl(priv, del_ba->peer_mac_addr, tid,
136 				      BA_SETUP_INPROGRESS);
137 
138 		tx_ba_tbl = mwifiex_get_ba_status(priv, BA_SETUP_INPROGRESS);
139 
140 		if (tx_ba_tbl)
141 			mwifiex_del_ba_tbl(priv, tx_ba_tbl->tid, tx_ba_tbl->ra,
142 					   TYPE_DELBA_SENT, true);
143 	}
144 
145 	return 0;
146 }
147 
148 /*
149  * This function handles the command response of add a block
150  * ack request.
151  *
152  * Handling includes changing the header fields to CPU formats, checking
153  * the response success status and taking actions accordingly (delete the
154  * BA stream table in case of failure).
155  */
156 int mwifiex_ret_11n_addba_req(struct mwifiex_private *priv,
157 			      struct host_cmd_ds_command *resp)
158 {
159 	int tid, tid_down;
160 	struct host_cmd_ds_11n_addba_rsp *add_ba_rsp = &resp->params.add_ba_rsp;
161 	struct mwifiex_tx_ba_stream_tbl *tx_ba_tbl;
162 	struct mwifiex_ra_list_tbl *ra_list;
163 	u16 block_ack_param_set = le16_to_cpu(add_ba_rsp->block_ack_param_set);
164 
165 	add_ba_rsp->ssn = cpu_to_le16((le16_to_cpu(add_ba_rsp->ssn))
166 			& SSN_MASK);
167 
168 	tid = (block_ack_param_set & IEEE80211_ADDBA_PARAM_TID_MASK)
169 	       >> BLOCKACKPARAM_TID_POS;
170 
171 	tid_down = mwifiex_wmm_downgrade_tid(priv, tid);
172 	ra_list = mwifiex_wmm_get_ralist_node(priv, tid_down, add_ba_rsp->
173 		peer_mac_addr);
174 	if (le16_to_cpu(add_ba_rsp->status_code) != BA_RESULT_SUCCESS) {
175 		if (ra_list) {
176 			ra_list->ba_status = BA_SETUP_NONE;
177 			ra_list->amsdu_in_ampdu = false;
178 		}
179 		mwifiex_del_ba_tbl(priv, tid, add_ba_rsp->peer_mac_addr,
180 				   TYPE_DELBA_SENT, true);
181 		if (add_ba_rsp->add_rsp_result != BA_RESULT_TIMEOUT)
182 			priv->aggr_prio_tbl[tid].ampdu_ap =
183 				BA_STREAM_NOT_ALLOWED;
184 		return 0;
185 	}
186 
187 	tx_ba_tbl = mwifiex_get_ba_tbl(priv, tid, add_ba_rsp->peer_mac_addr);
188 	if (tx_ba_tbl) {
189 		mwifiex_dbg(priv->adapter, EVENT, "info: BA stream complete\n");
190 		tx_ba_tbl->ba_status = BA_SETUP_COMPLETE;
191 		if ((block_ack_param_set & BLOCKACKPARAM_AMSDU_SUPP_MASK) &&
192 		    priv->add_ba_param.tx_amsdu &&
193 		    (priv->aggr_prio_tbl[tid].amsdu != BA_STREAM_NOT_ALLOWED))
194 			tx_ba_tbl->amsdu = true;
195 		else
196 			tx_ba_tbl->amsdu = false;
197 		if (ra_list) {
198 			ra_list->amsdu_in_ampdu = tx_ba_tbl->amsdu;
199 			ra_list->ba_status = BA_SETUP_COMPLETE;
200 		}
201 	} else {
202 		mwifiex_dbg(priv->adapter, ERROR, "BA stream not created\n");
203 	}
204 
205 	return 0;
206 }
207 
208 /*
209  * This function prepares command of reconfigure Tx buffer.
210  *
211  * Preparation includes -
212  *      - Setting command ID, action and proper size
213  *      - Setting Tx buffer size (for SET only)
214  *      - Ensuring correct endian-ness
215  */
216 int mwifiex_cmd_recfg_tx_buf(struct mwifiex_private *priv,
217 			     struct host_cmd_ds_command *cmd, int cmd_action,
218 			     u16 *buf_size)
219 {
220 	struct host_cmd_ds_txbuf_cfg *tx_buf = &cmd->params.tx_buf;
221 	u16 action = (u16) cmd_action;
222 
223 	cmd->command = cpu_to_le16(HostCmd_CMD_RECONFIGURE_TX_BUFF);
224 	cmd->size =
225 		cpu_to_le16(sizeof(struct host_cmd_ds_txbuf_cfg) + S_DS_GEN);
226 	tx_buf->action = cpu_to_le16(action);
227 	switch (action) {
228 	case HostCmd_ACT_GEN_SET:
229 		mwifiex_dbg(priv->adapter, CMD,
230 			    "cmd: set tx_buf=%d\n", *buf_size);
231 		tx_buf->buff_size = cpu_to_le16(*buf_size);
232 		break;
233 	case HostCmd_ACT_GEN_GET:
234 	default:
235 		tx_buf->buff_size = 0;
236 		break;
237 	}
238 	return 0;
239 }
240 
241 /*
242  * This function prepares command of AMSDU aggregation control.
243  *
244  * Preparation includes -
245  *      - Setting command ID, action and proper size
246  *      - Setting AMSDU control parameters (for SET only)
247  *      - Ensuring correct endian-ness
248  */
249 int mwifiex_cmd_amsdu_aggr_ctrl(struct host_cmd_ds_command *cmd,
250 				int cmd_action,
251 				struct mwifiex_ds_11n_amsdu_aggr_ctrl *aa_ctrl)
252 {
253 	struct host_cmd_ds_amsdu_aggr_ctrl *amsdu_ctrl =
254 		&cmd->params.amsdu_aggr_ctrl;
255 	u16 action = (u16) cmd_action;
256 
257 	cmd->command = cpu_to_le16(HostCmd_CMD_AMSDU_AGGR_CTRL);
258 	cmd->size = cpu_to_le16(sizeof(struct host_cmd_ds_amsdu_aggr_ctrl)
259 				+ S_DS_GEN);
260 	amsdu_ctrl->action = cpu_to_le16(action);
261 	switch (action) {
262 	case HostCmd_ACT_GEN_SET:
263 		amsdu_ctrl->enable = cpu_to_le16(aa_ctrl->enable);
264 		amsdu_ctrl->curr_buf_size = 0;
265 		break;
266 	case HostCmd_ACT_GEN_GET:
267 	default:
268 		amsdu_ctrl->curr_buf_size = 0;
269 		break;
270 	}
271 	return 0;
272 }
273 
274 /*
275  * This function prepares 11n configuration command.
276  *
277  * Preparation includes -
278  *      - Setting command ID, action and proper size
279  *      - Setting HT Tx capability and HT Tx information fields
280  *      - Ensuring correct endian-ness
281  */
282 int mwifiex_cmd_11n_cfg(struct mwifiex_private *priv,
283 			struct host_cmd_ds_command *cmd, u16 cmd_action,
284 			struct mwifiex_ds_11n_tx_cfg *txcfg)
285 {
286 	struct host_cmd_ds_11n_cfg *htcfg = &cmd->params.htcfg;
287 
288 	cmd->command = cpu_to_le16(HostCmd_CMD_11N_CFG);
289 	cmd->size = cpu_to_le16(sizeof(struct host_cmd_ds_11n_cfg) + S_DS_GEN);
290 	htcfg->action = cpu_to_le16(cmd_action);
291 	htcfg->ht_tx_cap = cpu_to_le16(txcfg->tx_htcap);
292 	htcfg->ht_tx_info = cpu_to_le16(txcfg->tx_htinfo);
293 
294 	if (priv->adapter->is_hw_11ac_capable)
295 		htcfg->misc_config = cpu_to_le16(txcfg->misc_config);
296 
297 	return 0;
298 }
299 
300 /*
301  * This function appends an 11n TLV to a buffer.
302  *
303  * Buffer allocation is responsibility of the calling
304  * function. No size validation is made here.
305  *
306  * The function fills up the following sections, if applicable -
307  *      - HT capability IE
308  *      - HT information IE (with channel list)
309  *      - 20/40 BSS Coexistence IE
310  *      - HT Extended Capabilities IE
311  */
312 int
313 mwifiex_cmd_append_11n_tlv(struct mwifiex_private *priv,
314 			   struct mwifiex_bssdescriptor *bss_desc,
315 			   u8 **buffer)
316 {
317 	struct mwifiex_ie_types_htcap *ht_cap;
318 	struct mwifiex_ie_types_htinfo *ht_info;
319 	struct mwifiex_ie_types_chan_list_param_set *chan_list;
320 	struct mwifiex_ie_types_2040bssco *bss_co_2040;
321 	struct mwifiex_ie_types_extcap *ext_cap;
322 	int ret_len = 0;
323 	struct ieee80211_supported_band *sband;
324 	struct ieee_types_header *hdr;
325 	u8 radio_type;
326 
327 	if (!buffer || !*buffer)
328 		return ret_len;
329 
330 	radio_type = mwifiex_band_to_radio_type((u8) bss_desc->bss_band);
331 	sband = priv->wdev.wiphy->bands[radio_type];
332 
333 	if (bss_desc->bcn_ht_cap) {
334 		ht_cap = (struct mwifiex_ie_types_htcap *) *buffer;
335 		memset(ht_cap, 0, sizeof(struct mwifiex_ie_types_htcap));
336 		ht_cap->header.type = cpu_to_le16(WLAN_EID_HT_CAPABILITY);
337 		ht_cap->header.len =
338 				cpu_to_le16(sizeof(struct ieee80211_ht_cap));
339 		memcpy((u8 *) ht_cap + sizeof(struct mwifiex_ie_types_header),
340 		       (u8 *)bss_desc->bcn_ht_cap,
341 		       le16_to_cpu(ht_cap->header.len));
342 
343 		mwifiex_fill_cap_info(priv, radio_type, &ht_cap->ht_cap);
344 
345 		*buffer += sizeof(struct mwifiex_ie_types_htcap);
346 		ret_len += sizeof(struct mwifiex_ie_types_htcap);
347 	}
348 
349 	if (bss_desc->bcn_ht_oper) {
350 		if (priv->bss_mode == NL80211_IFTYPE_ADHOC) {
351 			ht_info = (struct mwifiex_ie_types_htinfo *) *buffer;
352 			memset(ht_info, 0,
353 			       sizeof(struct mwifiex_ie_types_htinfo));
354 			ht_info->header.type =
355 					cpu_to_le16(WLAN_EID_HT_OPERATION);
356 			ht_info->header.len =
357 				cpu_to_le16(
358 					sizeof(struct ieee80211_ht_operation));
359 
360 			memcpy((u8 *) ht_info +
361 			       sizeof(struct mwifiex_ie_types_header),
362 			       (u8 *)bss_desc->bcn_ht_oper,
363 			       le16_to_cpu(ht_info->header.len));
364 
365 			if (!(sband->ht_cap.cap &
366 					IEEE80211_HT_CAP_SUP_WIDTH_20_40))
367 				ht_info->ht_oper.ht_param &=
368 					~(IEEE80211_HT_PARAM_CHAN_WIDTH_ANY |
369 					IEEE80211_HT_PARAM_CHA_SEC_OFFSET);
370 
371 			*buffer += sizeof(struct mwifiex_ie_types_htinfo);
372 			ret_len += sizeof(struct mwifiex_ie_types_htinfo);
373 		}
374 
375 		chan_list =
376 			(struct mwifiex_ie_types_chan_list_param_set *) *buffer;
377 		memset(chan_list, 0,
378 		       sizeof(struct mwifiex_ie_types_chan_list_param_set));
379 		chan_list->header.type = cpu_to_le16(TLV_TYPE_CHANLIST);
380 		chan_list->header.len = cpu_to_le16(
381 			sizeof(struct mwifiex_ie_types_chan_list_param_set) -
382 			sizeof(struct mwifiex_ie_types_header));
383 		chan_list->chan_scan_param[0].chan_number =
384 			bss_desc->bcn_ht_oper->primary_chan;
385 		chan_list->chan_scan_param[0].radio_type =
386 			mwifiex_band_to_radio_type((u8) bss_desc->bss_band);
387 
388 		if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
389 		    bss_desc->bcn_ht_oper->ht_param &
390 		    IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)
391 			SET_SECONDARYCHAN(chan_list->chan_scan_param[0].
392 					  radio_type,
393 					  (bss_desc->bcn_ht_oper->ht_param &
394 					  IEEE80211_HT_PARAM_CHA_SEC_OFFSET));
395 
396 		*buffer += sizeof(struct mwifiex_ie_types_chan_list_param_set);
397 		ret_len += sizeof(struct mwifiex_ie_types_chan_list_param_set);
398 	}
399 
400 	if (bss_desc->bcn_bss_co_2040) {
401 		bss_co_2040 = (struct mwifiex_ie_types_2040bssco *) *buffer;
402 		memset(bss_co_2040, 0,
403 		       sizeof(struct mwifiex_ie_types_2040bssco));
404 		bss_co_2040->header.type = cpu_to_le16(WLAN_EID_BSS_COEX_2040);
405 		bss_co_2040->header.len =
406 		       cpu_to_le16(sizeof(bss_co_2040->bss_co_2040));
407 
408 		memcpy((u8 *) bss_co_2040 +
409 		       sizeof(struct mwifiex_ie_types_header),
410 		       bss_desc->bcn_bss_co_2040 +
411 		       sizeof(struct ieee_types_header),
412 		       le16_to_cpu(bss_co_2040->header.len));
413 
414 		*buffer += sizeof(struct mwifiex_ie_types_2040bssco);
415 		ret_len += sizeof(struct mwifiex_ie_types_2040bssco);
416 	}
417 
418 	if (bss_desc->bcn_ext_cap) {
419 		hdr = (void *)bss_desc->bcn_ext_cap;
420 		ext_cap = (struct mwifiex_ie_types_extcap *) *buffer;
421 		memset(ext_cap, 0, sizeof(struct mwifiex_ie_types_extcap));
422 		ext_cap->header.type = cpu_to_le16(WLAN_EID_EXT_CAPABILITY);
423 		ext_cap->header.len = cpu_to_le16(hdr->len);
424 
425 		memcpy((u8 *)ext_cap->ext_capab,
426 		       bss_desc->bcn_ext_cap + sizeof(struct ieee_types_header),
427 		       le16_to_cpu(ext_cap->header.len));
428 
429 		if (hdr->len > 3 &&
430 		    ext_cap->ext_capab[3] & WLAN_EXT_CAPA4_INTERWORKING_ENABLED)
431 			priv->hs2_enabled = true;
432 		else
433 			priv->hs2_enabled = false;
434 
435 		*buffer += sizeof(struct mwifiex_ie_types_extcap) + hdr->len;
436 		ret_len += sizeof(struct mwifiex_ie_types_extcap) + hdr->len;
437 	}
438 
439 	return ret_len;
440 }
441 
442 /*
443  * This function checks if the given pointer is valid entry of
444  * Tx BA Stream table.
445  */
446 static int mwifiex_is_tx_ba_stream_ptr_valid(struct mwifiex_private *priv,
447 				struct mwifiex_tx_ba_stream_tbl *tx_tbl_ptr)
448 {
449 	struct mwifiex_tx_ba_stream_tbl *tx_ba_tsr_tbl;
450 
451 	list_for_each_entry(tx_ba_tsr_tbl, &priv->tx_ba_stream_tbl_ptr, list) {
452 		if (tx_ba_tsr_tbl == tx_tbl_ptr)
453 			return true;
454 	}
455 
456 	return false;
457 }
458 
459 /*
460  * This function deletes the given entry in Tx BA Stream table.
461  *
462  * The function also performs a validity check on the supplied
463  * pointer before trying to delete.
464  */
465 void mwifiex_11n_delete_tx_ba_stream_tbl_entry(struct mwifiex_private *priv,
466 				struct mwifiex_tx_ba_stream_tbl *tx_ba_tsr_tbl)
467 {
468 	if (!tx_ba_tsr_tbl &&
469 	    mwifiex_is_tx_ba_stream_ptr_valid(priv, tx_ba_tsr_tbl))
470 		return;
471 
472 	mwifiex_dbg(priv->adapter, INFO,
473 		    "info: tx_ba_tsr_tbl %p\n", tx_ba_tsr_tbl);
474 
475 	list_del(&tx_ba_tsr_tbl->list);
476 
477 	kfree(tx_ba_tsr_tbl);
478 }
479 
480 /*
481  * This function deletes all the entries in Tx BA Stream table.
482  */
483 void mwifiex_11n_delete_all_tx_ba_stream_tbl(struct mwifiex_private *priv)
484 {
485 	int i;
486 	struct mwifiex_tx_ba_stream_tbl *del_tbl_ptr, *tmp_node;
487 	unsigned long flags;
488 
489 	spin_lock_irqsave(&priv->tx_ba_stream_tbl_lock, flags);
490 	list_for_each_entry_safe(del_tbl_ptr, tmp_node,
491 				 &priv->tx_ba_stream_tbl_ptr, list)
492 		mwifiex_11n_delete_tx_ba_stream_tbl_entry(priv, del_tbl_ptr);
493 	spin_unlock_irqrestore(&priv->tx_ba_stream_tbl_lock, flags);
494 
495 	INIT_LIST_HEAD(&priv->tx_ba_stream_tbl_ptr);
496 
497 	for (i = 0; i < MAX_NUM_TID; ++i)
498 		priv->aggr_prio_tbl[i].ampdu_ap =
499 			priv->aggr_prio_tbl[i].ampdu_user;
500 }
501 
502 /*
503  * This function returns the pointer to an entry in BA Stream
504  * table which matches the given RA/TID pair.
505  */
506 struct mwifiex_tx_ba_stream_tbl *
507 mwifiex_get_ba_tbl(struct mwifiex_private *priv, int tid, u8 *ra)
508 {
509 	struct mwifiex_tx_ba_stream_tbl *tx_ba_tsr_tbl;
510 	unsigned long flags;
511 
512 	spin_lock_irqsave(&priv->tx_ba_stream_tbl_lock, flags);
513 	list_for_each_entry(tx_ba_tsr_tbl, &priv->tx_ba_stream_tbl_ptr, list) {
514 		if (ether_addr_equal_unaligned(tx_ba_tsr_tbl->ra, ra) &&
515 		    tx_ba_tsr_tbl->tid == tid) {
516 			spin_unlock_irqrestore(&priv->tx_ba_stream_tbl_lock,
517 					       flags);
518 			return tx_ba_tsr_tbl;
519 		}
520 	}
521 	spin_unlock_irqrestore(&priv->tx_ba_stream_tbl_lock, flags);
522 	return NULL;
523 }
524 
525 /*
526  * This function creates an entry in Tx BA stream table for the
527  * given RA/TID pair.
528  */
529 void mwifiex_create_ba_tbl(struct mwifiex_private *priv, u8 *ra, int tid,
530 			   enum mwifiex_ba_status ba_status)
531 {
532 	struct mwifiex_tx_ba_stream_tbl *new_node;
533 	struct mwifiex_ra_list_tbl *ra_list;
534 	unsigned long flags;
535 	int tid_down;
536 
537 	if (!mwifiex_get_ba_tbl(priv, tid, ra)) {
538 		new_node = kzalloc(sizeof(struct mwifiex_tx_ba_stream_tbl),
539 				   GFP_ATOMIC);
540 		if (!new_node)
541 			return;
542 
543 		tid_down = mwifiex_wmm_downgrade_tid(priv, tid);
544 		ra_list = mwifiex_wmm_get_ralist_node(priv, tid_down, ra);
545 		if (ra_list) {
546 			ra_list->ba_status = ba_status;
547 			ra_list->amsdu_in_ampdu = false;
548 		}
549 		INIT_LIST_HEAD(&new_node->list);
550 
551 		new_node->tid = tid;
552 		new_node->ba_status = ba_status;
553 		memcpy(new_node->ra, ra, ETH_ALEN);
554 
555 		spin_lock_irqsave(&priv->tx_ba_stream_tbl_lock, flags);
556 		list_add_tail(&new_node->list, &priv->tx_ba_stream_tbl_ptr);
557 		spin_unlock_irqrestore(&priv->tx_ba_stream_tbl_lock, flags);
558 	}
559 }
560 
561 /*
562  * This function sends an add BA request to the given TID/RA pair.
563  */
564 int mwifiex_send_addba(struct mwifiex_private *priv, int tid, u8 *peer_mac)
565 {
566 	struct host_cmd_ds_11n_addba_req add_ba_req;
567 	u32 tx_win_size = priv->add_ba_param.tx_win_size;
568 	static u8 dialog_tok;
569 	int ret;
570 	unsigned long flags;
571 	u16 block_ack_param_set;
572 
573 	mwifiex_dbg(priv->adapter, CMD, "cmd: %s: tid %d\n", __func__, tid);
574 
575 	memset(&add_ba_req, 0, sizeof(add_ba_req));
576 
577 	if ((GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA) &&
578 	    ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info) &&
579 	    priv->adapter->is_hw_11ac_capable &&
580 	    memcmp(priv->cfg_bssid, peer_mac, ETH_ALEN)) {
581 		struct mwifiex_sta_node *sta_ptr;
582 
583 		spin_lock_irqsave(&priv->sta_list_spinlock, flags);
584 		sta_ptr = mwifiex_get_sta_entry(priv, peer_mac);
585 		if (!sta_ptr) {
586 			spin_unlock_irqrestore(&priv->sta_list_spinlock, flags);
587 			mwifiex_dbg(priv->adapter, ERROR,
588 				    "BA setup with unknown TDLS peer %pM!\n",
589 				    peer_mac);
590 			return -1;
591 		}
592 		if (sta_ptr->is_11ac_enabled)
593 			tx_win_size = MWIFIEX_11AC_STA_AMPDU_DEF_TXWINSIZE;
594 		spin_unlock_irqrestore(&priv->sta_list_spinlock, flags);
595 	}
596 
597 	block_ack_param_set = (u16)((tid << BLOCKACKPARAM_TID_POS) |
598 				    tx_win_size << BLOCKACKPARAM_WINSIZE_POS |
599 				    IMMEDIATE_BLOCK_ACK);
600 
601 	/* enable AMSDU inside AMPDU */
602 	if (priv->add_ba_param.tx_amsdu &&
603 	    (priv->aggr_prio_tbl[tid].amsdu != BA_STREAM_NOT_ALLOWED))
604 		block_ack_param_set |= BLOCKACKPARAM_AMSDU_SUPP_MASK;
605 
606 	add_ba_req.block_ack_param_set = cpu_to_le16(block_ack_param_set);
607 	add_ba_req.block_ack_tmo = cpu_to_le16((u16)priv->add_ba_param.timeout);
608 
609 	++dialog_tok;
610 
611 	if (dialog_tok == 0)
612 		dialog_tok = 1;
613 
614 	add_ba_req.dialog_token = dialog_tok;
615 	memcpy(&add_ba_req.peer_mac_addr, peer_mac, ETH_ALEN);
616 
617 	/* We don't wait for the response of this command */
618 	ret = mwifiex_send_cmd(priv, HostCmd_CMD_11N_ADDBA_REQ,
619 			       0, 0, &add_ba_req, false);
620 
621 	return ret;
622 }
623 
624 /*
625  * This function sends a delete BA request to the given TID/RA pair.
626  */
627 int mwifiex_send_delba(struct mwifiex_private *priv, int tid, u8 *peer_mac,
628 		       int initiator)
629 {
630 	struct host_cmd_ds_11n_delba delba;
631 	int ret;
632 	uint16_t del_ba_param_set;
633 
634 	memset(&delba, 0, sizeof(delba));
635 	delba.del_ba_param_set = cpu_to_le16(tid << DELBA_TID_POS);
636 
637 	del_ba_param_set = le16_to_cpu(delba.del_ba_param_set);
638 	if (initiator)
639 		del_ba_param_set |= IEEE80211_DELBA_PARAM_INITIATOR_MASK;
640 	else
641 		del_ba_param_set &= ~IEEE80211_DELBA_PARAM_INITIATOR_MASK;
642 
643 	memcpy(&delba.peer_mac_addr, peer_mac, ETH_ALEN);
644 
645 	/* We don't wait for the response of this command */
646 	ret = mwifiex_send_cmd(priv, HostCmd_CMD_11N_DELBA,
647 			       HostCmd_ACT_GEN_SET, 0, &delba, false);
648 
649 	return ret;
650 }
651 
652 /*
653  * This function sends delba to specific tid
654  */
655 void mwifiex_11n_delba(struct mwifiex_private *priv, int tid)
656 {
657 	struct mwifiex_rx_reorder_tbl *rx_reor_tbl_ptr;
658 	unsigned long flags;
659 
660 	spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags);
661 	list_for_each_entry(rx_reor_tbl_ptr, &priv->rx_reorder_tbl_ptr, list) {
662 		if (rx_reor_tbl_ptr->tid == tid) {
663 			dev_dbg(priv->adapter->dev,
664 				"Send delba to tid=%d, %pM\n",
665 				tid, rx_reor_tbl_ptr->ta);
666 			mwifiex_send_delba(priv, tid, rx_reor_tbl_ptr->ta, 0);
667 			goto exit;
668 		}
669 	}
670 exit:
671 	spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags);
672 }
673 
674 /*
675  * This function handles the command response of a delete BA request.
676  */
677 void mwifiex_11n_delete_ba_stream(struct mwifiex_private *priv, u8 *del_ba)
678 {
679 	struct host_cmd_ds_11n_delba *cmd_del_ba =
680 		(struct host_cmd_ds_11n_delba *) del_ba;
681 	uint16_t del_ba_param_set = le16_to_cpu(cmd_del_ba->del_ba_param_set);
682 	int tid;
683 
684 	tid = del_ba_param_set >> DELBA_TID_POS;
685 
686 	mwifiex_del_ba_tbl(priv, tid, cmd_del_ba->peer_mac_addr,
687 			   TYPE_DELBA_RECEIVE, INITIATOR_BIT(del_ba_param_set));
688 }
689 
690 /*
691  * This function retrieves the Rx reordering table.
692  */
693 int mwifiex_get_rx_reorder_tbl(struct mwifiex_private *priv,
694 			       struct mwifiex_ds_rx_reorder_tbl *buf)
695 {
696 	int i;
697 	struct mwifiex_ds_rx_reorder_tbl *rx_reo_tbl = buf;
698 	struct mwifiex_rx_reorder_tbl *rx_reorder_tbl_ptr;
699 	int count = 0;
700 	unsigned long flags;
701 
702 	spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags);
703 	list_for_each_entry(rx_reorder_tbl_ptr, &priv->rx_reorder_tbl_ptr,
704 			    list) {
705 		rx_reo_tbl->tid = (u16) rx_reorder_tbl_ptr->tid;
706 		memcpy(rx_reo_tbl->ta, rx_reorder_tbl_ptr->ta, ETH_ALEN);
707 		rx_reo_tbl->start_win = rx_reorder_tbl_ptr->start_win;
708 		rx_reo_tbl->win_size = rx_reorder_tbl_ptr->win_size;
709 		for (i = 0; i < rx_reorder_tbl_ptr->win_size; ++i) {
710 			if (rx_reorder_tbl_ptr->rx_reorder_ptr[i])
711 				rx_reo_tbl->buffer[i] = true;
712 			else
713 				rx_reo_tbl->buffer[i] = false;
714 		}
715 		rx_reo_tbl++;
716 		count++;
717 
718 		if (count >= MWIFIEX_MAX_RX_BASTREAM_SUPPORTED)
719 			break;
720 	}
721 	spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags);
722 
723 	return count;
724 }
725 
726 /*
727  * This function retrieves the Tx BA stream table.
728  */
729 int mwifiex_get_tx_ba_stream_tbl(struct mwifiex_private *priv,
730 				 struct mwifiex_ds_tx_ba_stream_tbl *buf)
731 {
732 	struct mwifiex_tx_ba_stream_tbl *tx_ba_tsr_tbl;
733 	struct mwifiex_ds_tx_ba_stream_tbl *rx_reo_tbl = buf;
734 	int count = 0;
735 	unsigned long flags;
736 
737 	spin_lock_irqsave(&priv->tx_ba_stream_tbl_lock, flags);
738 	list_for_each_entry(tx_ba_tsr_tbl, &priv->tx_ba_stream_tbl_ptr, list) {
739 		rx_reo_tbl->tid = (u16) tx_ba_tsr_tbl->tid;
740 		mwifiex_dbg(priv->adapter, DATA, "data: %s tid=%d\n",
741 			    __func__, rx_reo_tbl->tid);
742 		memcpy(rx_reo_tbl->ra, tx_ba_tsr_tbl->ra, ETH_ALEN);
743 		rx_reo_tbl->amsdu = tx_ba_tsr_tbl->amsdu;
744 		rx_reo_tbl++;
745 		count++;
746 		if (count >= MWIFIEX_MAX_TX_BASTREAM_SUPPORTED)
747 			break;
748 	}
749 	spin_unlock_irqrestore(&priv->tx_ba_stream_tbl_lock, flags);
750 
751 	return count;
752 }
753 
754 /*
755  * This function retrieves the entry for specific tx BA stream table by RA and
756  * deletes it.
757  */
758 void mwifiex_del_tx_ba_stream_tbl_by_ra(struct mwifiex_private *priv, u8 *ra)
759 {
760 	struct mwifiex_tx_ba_stream_tbl *tbl, *tmp;
761 	unsigned long flags;
762 
763 	if (!ra)
764 		return;
765 
766 	spin_lock_irqsave(&priv->tx_ba_stream_tbl_lock, flags);
767 	list_for_each_entry_safe(tbl, tmp, &priv->tx_ba_stream_tbl_ptr, list)
768 		if (!memcmp(tbl->ra, ra, ETH_ALEN))
769 			mwifiex_11n_delete_tx_ba_stream_tbl_entry(priv, tbl);
770 	spin_unlock_irqrestore(&priv->tx_ba_stream_tbl_lock, flags);
771 
772 	return;
773 }
774 
775 /* This function initializes the BlockACK setup information for given
776  * mwifiex_private structure.
777  */
778 void mwifiex_set_ba_params(struct mwifiex_private *priv)
779 {
780 	priv->add_ba_param.timeout = MWIFIEX_DEFAULT_BLOCK_ACK_TIMEOUT;
781 
782 	if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_UAP) {
783 		priv->add_ba_param.tx_win_size =
784 						MWIFIEX_UAP_AMPDU_DEF_TXWINSIZE;
785 		priv->add_ba_param.rx_win_size =
786 						MWIFIEX_UAP_AMPDU_DEF_RXWINSIZE;
787 	} else {
788 		priv->add_ba_param.tx_win_size =
789 						MWIFIEX_STA_AMPDU_DEF_TXWINSIZE;
790 		priv->add_ba_param.rx_win_size =
791 						MWIFIEX_STA_AMPDU_DEF_RXWINSIZE;
792 	}
793 
794 	priv->add_ba_param.tx_amsdu = true;
795 	priv->add_ba_param.rx_amsdu = true;
796 
797 	return;
798 }
799 
800 u8 mwifiex_get_sec_chan_offset(int chan)
801 {
802 	u8 sec_offset;
803 
804 	switch (chan) {
805 	case 36:
806 	case 44:
807 	case 52:
808 	case 60:
809 	case 100:
810 	case 108:
811 	case 116:
812 	case 124:
813 	case 132:
814 	case 140:
815 	case 149:
816 	case 157:
817 		sec_offset = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
818 		break;
819 	case 40:
820 	case 48:
821 	case 56:
822 	case 64:
823 	case 104:
824 	case 112:
825 	case 120:
826 	case 128:
827 	case 136:
828 	case 144:
829 	case 153:
830 	case 161:
831 		sec_offset = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
832 		break;
833 	case 165:
834 	default:
835 		sec_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE;
836 		break;
837 	}
838 
839 	return sec_offset;
840 }
841 
842 /* This function will send DELBA to entries in the priv's
843  * Tx BA stream table
844  */
845 static void
846 mwifiex_send_delba_txbastream_tbl(struct mwifiex_private *priv, u8 tid)
847 {
848 	struct mwifiex_adapter *adapter = priv->adapter;
849 	struct mwifiex_tx_ba_stream_tbl *tx_ba_stream_tbl_ptr;
850 
851 	list_for_each_entry(tx_ba_stream_tbl_ptr,
852 			    &priv->tx_ba_stream_tbl_ptr, list) {
853 		if (tx_ba_stream_tbl_ptr->ba_status == BA_SETUP_COMPLETE) {
854 			if (tid == tx_ba_stream_tbl_ptr->tid) {
855 				dev_dbg(adapter->dev,
856 					"Tx:Send delba to tid=%d, %pM\n", tid,
857 					tx_ba_stream_tbl_ptr->ra);
858 				mwifiex_send_delba(priv,
859 						   tx_ba_stream_tbl_ptr->tid,
860 						   tx_ba_stream_tbl_ptr->ra, 1);
861 				return;
862 			}
863 		}
864 	}
865 }
866 
867 /* This function updates all the tx_win_size
868  */
869 void mwifiex_update_ampdu_txwinsize(struct mwifiex_adapter *adapter)
870 {
871 	u8 i;
872 	u32 tx_win_size;
873 	struct mwifiex_private *priv;
874 
875 	for (i = 0; i < adapter->priv_num; i++) {
876 		if (!adapter->priv[i])
877 			continue;
878 		priv = adapter->priv[i];
879 		tx_win_size = priv->add_ba_param.tx_win_size;
880 
881 		if (priv->bss_type == MWIFIEX_BSS_TYPE_STA)
882 			priv->add_ba_param.tx_win_size =
883 				MWIFIEX_STA_AMPDU_DEF_TXWINSIZE;
884 
885 		if (priv->bss_type == MWIFIEX_BSS_TYPE_P2P)
886 			priv->add_ba_param.tx_win_size =
887 				MWIFIEX_STA_AMPDU_DEF_TXWINSIZE;
888 
889 		if (priv->bss_type == MWIFIEX_BSS_TYPE_UAP)
890 			priv->add_ba_param.tx_win_size =
891 				MWIFIEX_UAP_AMPDU_DEF_TXWINSIZE;
892 
893 		if (adapter->coex_win_size) {
894 			if (adapter->coex_tx_win_size)
895 				priv->add_ba_param.tx_win_size =
896 					adapter->coex_tx_win_size;
897 		}
898 
899 		if (tx_win_size != priv->add_ba_param.tx_win_size) {
900 			if (!priv->media_connected)
901 				continue;
902 			for (i = 0; i < MAX_NUM_TID; i++)
903 				mwifiex_send_delba_txbastream_tbl(priv, i);
904 		}
905 	}
906 }
907