1 /*
2  * NXP Wireless LAN device driver: 802.11n
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 /*
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  */
mwifiex_fill_cap_info(struct mwifiex_private * priv,u8 radio_type,struct ieee80211_ht_cap * ht_cap)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 *
mwifiex_get_ba_status(struct mwifiex_private * priv,enum mwifiex_ba_status ba_status)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 
88 	spin_lock_bh(&priv->tx_ba_stream_tbl_lock);
89 	list_for_each_entry(tx_ba_tsr_tbl, &priv->tx_ba_stream_tbl_ptr, list) {
90 		if (tx_ba_tsr_tbl->ba_status == ba_status) {
91 			spin_unlock_bh(&priv->tx_ba_stream_tbl_lock);
92 			return tx_ba_tsr_tbl;
93 		}
94 	}
95 	spin_unlock_bh(&priv->tx_ba_stream_tbl_lock);
96 	return NULL;
97 }
98 
99 /*
100  * This function handles the command response of delete a block
101  * ack request.
102  *
103  * The function checks the response success status and takes action
104  * accordingly (send an add BA request in case of success, or recreate
105  * the deleted stream in case of failure, if the add BA was also
106  * initiated by us).
107  */
mwifiex_ret_11n_delba(struct mwifiex_private * priv,struct host_cmd_ds_command * resp)108 int mwifiex_ret_11n_delba(struct mwifiex_private *priv,
109 			  struct host_cmd_ds_command *resp)
110 {
111 	int tid;
112 	struct mwifiex_tx_ba_stream_tbl *tx_ba_tbl;
113 	struct host_cmd_ds_11n_delba *del_ba = &resp->params.del_ba;
114 	uint16_t del_ba_param_set = le16_to_cpu(del_ba->del_ba_param_set);
115 
116 	tid = del_ba_param_set >> DELBA_TID_POS;
117 	if (del_ba->del_result == BA_RESULT_SUCCESS) {
118 		mwifiex_del_ba_tbl(priv, tid, del_ba->peer_mac_addr,
119 				   TYPE_DELBA_SENT,
120 				   INITIATOR_BIT(del_ba_param_set));
121 
122 		tx_ba_tbl = mwifiex_get_ba_status(priv, BA_SETUP_INPROGRESS);
123 		if (tx_ba_tbl)
124 			mwifiex_send_addba(priv, tx_ba_tbl->tid,
125 					   tx_ba_tbl->ra);
126 	} else { /*
127 		  * In case of failure, recreate the deleted stream in case
128 		  * we initiated the ADDBA
129 		  */
130 		if (!INITIATOR_BIT(del_ba_param_set))
131 			return 0;
132 
133 		mwifiex_create_ba_tbl(priv, del_ba->peer_mac_addr, tid,
134 				      BA_SETUP_INPROGRESS);
135 
136 		tx_ba_tbl = mwifiex_get_ba_status(priv, BA_SETUP_INPROGRESS);
137 
138 		if (tx_ba_tbl)
139 			mwifiex_del_ba_tbl(priv, tx_ba_tbl->tid, tx_ba_tbl->ra,
140 					   TYPE_DELBA_SENT, true);
141 	}
142 
143 	return 0;
144 }
145 
146 /*
147  * This function handles the command response of add a block
148  * ack request.
149  *
150  * Handling includes changing the header fields to CPU formats, checking
151  * the response success status and taking actions accordingly (delete the
152  * BA stream table in case of failure).
153  */
mwifiex_ret_11n_addba_req(struct mwifiex_private * priv,struct host_cmd_ds_command * resp)154 int mwifiex_ret_11n_addba_req(struct mwifiex_private *priv,
155 			      struct host_cmd_ds_command *resp)
156 {
157 	int tid, tid_down;
158 	struct host_cmd_ds_11n_addba_rsp *add_ba_rsp = &resp->params.add_ba_rsp;
159 	struct mwifiex_tx_ba_stream_tbl *tx_ba_tbl;
160 	struct mwifiex_ra_list_tbl *ra_list;
161 	u16 block_ack_param_set = le16_to_cpu(add_ba_rsp->block_ack_param_set);
162 
163 	add_ba_rsp->ssn = cpu_to_le16((le16_to_cpu(add_ba_rsp->ssn))
164 			& SSN_MASK);
165 
166 	tid = (block_ack_param_set & IEEE80211_ADDBA_PARAM_TID_MASK)
167 	       >> BLOCKACKPARAM_TID_POS;
168 
169 	tid_down = mwifiex_wmm_downgrade_tid(priv, tid);
170 	ra_list = mwifiex_wmm_get_ralist_node(priv, tid_down, add_ba_rsp->
171 		peer_mac_addr);
172 	if (le16_to_cpu(add_ba_rsp->status_code) != BA_RESULT_SUCCESS) {
173 		if (ra_list) {
174 			ra_list->ba_status = BA_SETUP_NONE;
175 			ra_list->amsdu_in_ampdu = false;
176 		}
177 		mwifiex_del_ba_tbl(priv, tid, add_ba_rsp->peer_mac_addr,
178 				   TYPE_DELBA_SENT, true);
179 		if (add_ba_rsp->add_rsp_result != BA_RESULT_TIMEOUT)
180 			priv->aggr_prio_tbl[tid].ampdu_ap =
181 				BA_STREAM_NOT_ALLOWED;
182 		return 0;
183 	}
184 
185 	tx_ba_tbl = mwifiex_get_ba_tbl(priv, tid, add_ba_rsp->peer_mac_addr);
186 	if (tx_ba_tbl) {
187 		mwifiex_dbg(priv->adapter, EVENT, "info: BA stream complete\n");
188 		tx_ba_tbl->ba_status = BA_SETUP_COMPLETE;
189 		if ((block_ack_param_set & BLOCKACKPARAM_AMSDU_SUPP_MASK) &&
190 		    priv->add_ba_param.tx_amsdu &&
191 		    (priv->aggr_prio_tbl[tid].amsdu != BA_STREAM_NOT_ALLOWED))
192 			tx_ba_tbl->amsdu = true;
193 		else
194 			tx_ba_tbl->amsdu = false;
195 		if (ra_list) {
196 			ra_list->amsdu_in_ampdu = tx_ba_tbl->amsdu;
197 			ra_list->ba_status = BA_SETUP_COMPLETE;
198 		}
199 	} else {
200 		mwifiex_dbg(priv->adapter, ERROR, "BA stream not created\n");
201 	}
202 
203 	return 0;
204 }
205 
206 /*
207  * This function prepares command of reconfigure Tx buffer.
208  *
209  * Preparation includes -
210  *      - Setting command ID, action and proper size
211  *      - Setting Tx buffer size (for SET only)
212  *      - Ensuring correct endian-ness
213  */
mwifiex_cmd_recfg_tx_buf(struct mwifiex_private * priv,struct host_cmd_ds_command * cmd,int cmd_action,u16 * buf_size)214 int mwifiex_cmd_recfg_tx_buf(struct mwifiex_private *priv,
215 			     struct host_cmd_ds_command *cmd, int cmd_action,
216 			     u16 *buf_size)
217 {
218 	struct host_cmd_ds_txbuf_cfg *tx_buf = &cmd->params.tx_buf;
219 	u16 action = (u16) cmd_action;
220 
221 	cmd->command = cpu_to_le16(HostCmd_CMD_RECONFIGURE_TX_BUFF);
222 	cmd->size =
223 		cpu_to_le16(sizeof(struct host_cmd_ds_txbuf_cfg) + S_DS_GEN);
224 	tx_buf->action = cpu_to_le16(action);
225 	switch (action) {
226 	case HostCmd_ACT_GEN_SET:
227 		mwifiex_dbg(priv->adapter, CMD,
228 			    "cmd: set tx_buf=%d\n", *buf_size);
229 		tx_buf->buff_size = cpu_to_le16(*buf_size);
230 		break;
231 	case HostCmd_ACT_GEN_GET:
232 	default:
233 		tx_buf->buff_size = 0;
234 		break;
235 	}
236 	return 0;
237 }
238 
239 /*
240  * This function prepares command of AMSDU aggregation control.
241  *
242  * Preparation includes -
243  *      - Setting command ID, action and proper size
244  *      - Setting AMSDU control parameters (for SET only)
245  *      - Ensuring correct endian-ness
246  */
mwifiex_cmd_amsdu_aggr_ctrl(struct host_cmd_ds_command * cmd,int cmd_action,struct mwifiex_ds_11n_amsdu_aggr_ctrl * aa_ctrl)247 int mwifiex_cmd_amsdu_aggr_ctrl(struct host_cmd_ds_command *cmd,
248 				int cmd_action,
249 				struct mwifiex_ds_11n_amsdu_aggr_ctrl *aa_ctrl)
250 {
251 	struct host_cmd_ds_amsdu_aggr_ctrl *amsdu_ctrl =
252 		&cmd->params.amsdu_aggr_ctrl;
253 	u16 action = (u16) cmd_action;
254 
255 	cmd->command = cpu_to_le16(HostCmd_CMD_AMSDU_AGGR_CTRL);
256 	cmd->size = cpu_to_le16(sizeof(struct host_cmd_ds_amsdu_aggr_ctrl)
257 				+ S_DS_GEN);
258 	amsdu_ctrl->action = cpu_to_le16(action);
259 	switch (action) {
260 	case HostCmd_ACT_GEN_SET:
261 		amsdu_ctrl->enable = cpu_to_le16(aa_ctrl->enable);
262 		amsdu_ctrl->curr_buf_size = 0;
263 		break;
264 	case HostCmd_ACT_GEN_GET:
265 	default:
266 		amsdu_ctrl->curr_buf_size = 0;
267 		break;
268 	}
269 	return 0;
270 }
271 
272 /*
273  * This function prepares 11n configuration command.
274  *
275  * Preparation includes -
276  *      - Setting command ID, action and proper size
277  *      - Setting HT Tx capability and HT Tx information fields
278  *      - Ensuring correct endian-ness
279  */
mwifiex_cmd_11n_cfg(struct mwifiex_private * priv,struct host_cmd_ds_command * cmd,u16 cmd_action,struct mwifiex_ds_11n_tx_cfg * txcfg)280 int mwifiex_cmd_11n_cfg(struct mwifiex_private *priv,
281 			struct host_cmd_ds_command *cmd, u16 cmd_action,
282 			struct mwifiex_ds_11n_tx_cfg *txcfg)
283 {
284 	struct host_cmd_ds_11n_cfg *htcfg = &cmd->params.htcfg;
285 
286 	cmd->command = cpu_to_le16(HostCmd_CMD_11N_CFG);
287 	cmd->size = cpu_to_le16(sizeof(struct host_cmd_ds_11n_cfg) + S_DS_GEN);
288 	htcfg->action = cpu_to_le16(cmd_action);
289 	htcfg->ht_tx_cap = cpu_to_le16(txcfg->tx_htcap);
290 	htcfg->ht_tx_info = cpu_to_le16(txcfg->tx_htinfo);
291 
292 	if (priv->adapter->is_hw_11ac_capable)
293 		htcfg->misc_config = cpu_to_le16(txcfg->misc_config);
294 
295 	return 0;
296 }
297 
298 /*
299  * This function appends an 11n TLV to a buffer.
300  *
301  * Buffer allocation is responsibility of the calling
302  * function. No size validation is made here.
303  *
304  * The function fills up the following sections, if applicable -
305  *      - HT capability IE
306  *      - HT information IE (with channel list)
307  *      - 20/40 BSS Coexistence IE
308  *      - HT Extended Capabilities IE
309  */
310 int
mwifiex_cmd_append_11n_tlv(struct mwifiex_private * priv,struct mwifiex_bssdescriptor * bss_desc,u8 ** buffer)311 mwifiex_cmd_append_11n_tlv(struct mwifiex_private *priv,
312 			   struct mwifiex_bssdescriptor *bss_desc,
313 			   u8 **buffer)
314 {
315 	struct mwifiex_ie_types_htcap *ht_cap;
316 	struct mwifiex_ie_types_htinfo *ht_info;
317 	struct mwifiex_ie_types_chan_list_param_set *chan_list;
318 	struct mwifiex_ie_types_2040bssco *bss_co_2040;
319 	struct mwifiex_ie_types_extcap *ext_cap;
320 	int ret_len = 0;
321 	struct ieee80211_supported_band *sband;
322 	struct ieee_types_header *hdr;
323 	u8 radio_type;
324 
325 	if (!buffer || !*buffer)
326 		return ret_len;
327 
328 	radio_type = mwifiex_band_to_radio_type((u8) bss_desc->bss_band);
329 	sband = priv->wdev.wiphy->bands[radio_type];
330 
331 	if (bss_desc->bcn_ht_cap) {
332 		ht_cap = (struct mwifiex_ie_types_htcap *) *buffer;
333 		memset(ht_cap, 0, sizeof(struct mwifiex_ie_types_htcap));
334 		ht_cap->header.type = cpu_to_le16(WLAN_EID_HT_CAPABILITY);
335 		ht_cap->header.len =
336 				cpu_to_le16(sizeof(struct ieee80211_ht_cap));
337 		memcpy((u8 *) ht_cap + sizeof(struct mwifiex_ie_types_header),
338 		       (u8 *)bss_desc->bcn_ht_cap,
339 		       le16_to_cpu(ht_cap->header.len));
340 
341 		mwifiex_fill_cap_info(priv, radio_type, &ht_cap->ht_cap);
342 		/* Update HT40 capability from current channel information */
343 		if (bss_desc->bcn_ht_oper) {
344 			u8 ht_param = bss_desc->bcn_ht_oper->ht_param;
345 			u8 radio =
346 			mwifiex_band_to_radio_type(bss_desc->bss_band);
347 			int freq =
348 			ieee80211_channel_to_frequency(bss_desc->channel,
349 						       radio);
350 			struct ieee80211_channel *chan =
351 			ieee80211_get_channel(priv->adapter->wiphy, freq);
352 
353 			switch (ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
354 			case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
355 				if (chan->flags & IEEE80211_CHAN_NO_HT40PLUS) {
356 					ht_cap->ht_cap.cap_info &=
357 					cpu_to_le16
358 					(~IEEE80211_HT_CAP_SUP_WIDTH_20_40);
359 					ht_cap->ht_cap.cap_info &=
360 					cpu_to_le16(~IEEE80211_HT_CAP_SGI_40);
361 				}
362 				break;
363 			case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
364 				if (chan->flags & IEEE80211_CHAN_NO_HT40MINUS) {
365 					ht_cap->ht_cap.cap_info &=
366 					cpu_to_le16
367 					(~IEEE80211_HT_CAP_SUP_WIDTH_20_40);
368 					ht_cap->ht_cap.cap_info &=
369 					cpu_to_le16(~IEEE80211_HT_CAP_SGI_40);
370 				}
371 				break;
372 			}
373 		}
374 
375 		*buffer += sizeof(struct mwifiex_ie_types_htcap);
376 		ret_len += sizeof(struct mwifiex_ie_types_htcap);
377 	}
378 
379 	if (bss_desc->bcn_ht_oper) {
380 		if (priv->bss_mode == NL80211_IFTYPE_ADHOC) {
381 			ht_info = (struct mwifiex_ie_types_htinfo *) *buffer;
382 			memset(ht_info, 0,
383 			       sizeof(struct mwifiex_ie_types_htinfo));
384 			ht_info->header.type =
385 					cpu_to_le16(WLAN_EID_HT_OPERATION);
386 			ht_info->header.len =
387 				cpu_to_le16(
388 					sizeof(struct ieee80211_ht_operation));
389 
390 			memcpy((u8 *) ht_info +
391 			       sizeof(struct mwifiex_ie_types_header),
392 			       (u8 *)bss_desc->bcn_ht_oper,
393 			       le16_to_cpu(ht_info->header.len));
394 
395 			if (!(sband->ht_cap.cap &
396 					IEEE80211_HT_CAP_SUP_WIDTH_20_40))
397 				ht_info->ht_oper.ht_param &=
398 					~(IEEE80211_HT_PARAM_CHAN_WIDTH_ANY |
399 					IEEE80211_HT_PARAM_CHA_SEC_OFFSET);
400 
401 			*buffer += sizeof(struct mwifiex_ie_types_htinfo);
402 			ret_len += sizeof(struct mwifiex_ie_types_htinfo);
403 		}
404 
405 		chan_list =
406 			(struct mwifiex_ie_types_chan_list_param_set *) *buffer;
407 		memset(chan_list, 0,
408 		       sizeof(struct mwifiex_ie_types_chan_list_param_set));
409 		chan_list->header.type = cpu_to_le16(TLV_TYPE_CHANLIST);
410 		chan_list->header.len = cpu_to_le16(
411 			sizeof(struct mwifiex_ie_types_chan_list_param_set) -
412 			sizeof(struct mwifiex_ie_types_header));
413 		chan_list->chan_scan_param[0].chan_number =
414 			bss_desc->bcn_ht_oper->primary_chan;
415 		chan_list->chan_scan_param[0].radio_type =
416 			mwifiex_band_to_radio_type((u8) bss_desc->bss_band);
417 
418 		if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
419 		    bss_desc->bcn_ht_oper->ht_param &
420 		    IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)
421 			SET_SECONDARYCHAN(chan_list->chan_scan_param[0].
422 					  radio_type,
423 					  (bss_desc->bcn_ht_oper->ht_param &
424 					  IEEE80211_HT_PARAM_CHA_SEC_OFFSET));
425 
426 		*buffer += sizeof(struct mwifiex_ie_types_chan_list_param_set);
427 		ret_len += sizeof(struct mwifiex_ie_types_chan_list_param_set);
428 	}
429 
430 	if (bss_desc->bcn_bss_co_2040) {
431 		bss_co_2040 = (struct mwifiex_ie_types_2040bssco *) *buffer;
432 		memset(bss_co_2040, 0,
433 		       sizeof(struct mwifiex_ie_types_2040bssco));
434 		bss_co_2040->header.type = cpu_to_le16(WLAN_EID_BSS_COEX_2040);
435 		bss_co_2040->header.len =
436 		       cpu_to_le16(sizeof(bss_co_2040->bss_co_2040));
437 
438 		memcpy((u8 *) bss_co_2040 +
439 		       sizeof(struct mwifiex_ie_types_header),
440 		       bss_desc->bcn_bss_co_2040 +
441 		       sizeof(struct ieee_types_header),
442 		       le16_to_cpu(bss_co_2040->header.len));
443 
444 		*buffer += sizeof(struct mwifiex_ie_types_2040bssco);
445 		ret_len += sizeof(struct mwifiex_ie_types_2040bssco);
446 	}
447 
448 	if (bss_desc->bcn_ext_cap) {
449 		hdr = (void *)bss_desc->bcn_ext_cap;
450 		ext_cap = (struct mwifiex_ie_types_extcap *) *buffer;
451 		memset(ext_cap, 0, sizeof(struct mwifiex_ie_types_extcap));
452 		ext_cap->header.type = cpu_to_le16(WLAN_EID_EXT_CAPABILITY);
453 		ext_cap->header.len = cpu_to_le16(hdr->len);
454 
455 		memcpy((u8 *)ext_cap->ext_capab,
456 		       bss_desc->bcn_ext_cap + sizeof(struct ieee_types_header),
457 		       le16_to_cpu(ext_cap->header.len));
458 
459 		if (hdr->len > 3 &&
460 		    ext_cap->ext_capab[3] & WLAN_EXT_CAPA4_INTERWORKING_ENABLED)
461 			priv->hs2_enabled = true;
462 		else
463 			priv->hs2_enabled = false;
464 
465 		*buffer += sizeof(struct mwifiex_ie_types_extcap) + hdr->len;
466 		ret_len += sizeof(struct mwifiex_ie_types_extcap) + hdr->len;
467 	}
468 
469 	return ret_len;
470 }
471 
472 /*
473  * This function checks if the given pointer is valid entry of
474  * Tx BA Stream table.
475  */
mwifiex_is_tx_ba_stream_ptr_valid(struct mwifiex_private * priv,struct mwifiex_tx_ba_stream_tbl * tx_tbl_ptr)476 static int mwifiex_is_tx_ba_stream_ptr_valid(struct mwifiex_private *priv,
477 				struct mwifiex_tx_ba_stream_tbl *tx_tbl_ptr)
478 {
479 	struct mwifiex_tx_ba_stream_tbl *tx_ba_tsr_tbl;
480 
481 	list_for_each_entry(tx_ba_tsr_tbl, &priv->tx_ba_stream_tbl_ptr, list) {
482 		if (tx_ba_tsr_tbl == tx_tbl_ptr)
483 			return true;
484 	}
485 
486 	return false;
487 }
488 
489 /*
490  * This function deletes the given entry in Tx BA Stream table.
491  *
492  * The function also performs a validity check on the supplied
493  * pointer before trying to delete.
494  */
mwifiex_11n_delete_tx_ba_stream_tbl_entry(struct mwifiex_private * priv,struct mwifiex_tx_ba_stream_tbl * tx_ba_tsr_tbl)495 void mwifiex_11n_delete_tx_ba_stream_tbl_entry(struct mwifiex_private *priv,
496 				struct mwifiex_tx_ba_stream_tbl *tx_ba_tsr_tbl)
497 {
498 	if (!tx_ba_tsr_tbl &&
499 	    mwifiex_is_tx_ba_stream_ptr_valid(priv, tx_ba_tsr_tbl))
500 		return;
501 
502 	mwifiex_dbg(priv->adapter, INFO,
503 		    "info: tx_ba_tsr_tbl %p\n", tx_ba_tsr_tbl);
504 
505 	list_del(&tx_ba_tsr_tbl->list);
506 
507 	kfree(tx_ba_tsr_tbl);
508 }
509 
510 /*
511  * This function deletes all the entries in Tx BA Stream table.
512  */
mwifiex_11n_delete_all_tx_ba_stream_tbl(struct mwifiex_private * priv)513 void mwifiex_11n_delete_all_tx_ba_stream_tbl(struct mwifiex_private *priv)
514 {
515 	int i;
516 	struct mwifiex_tx_ba_stream_tbl *del_tbl_ptr, *tmp_node;
517 
518 	spin_lock_bh(&priv->tx_ba_stream_tbl_lock);
519 	list_for_each_entry_safe(del_tbl_ptr, tmp_node,
520 				 &priv->tx_ba_stream_tbl_ptr, list)
521 		mwifiex_11n_delete_tx_ba_stream_tbl_entry(priv, del_tbl_ptr);
522 	spin_unlock_bh(&priv->tx_ba_stream_tbl_lock);
523 
524 	INIT_LIST_HEAD(&priv->tx_ba_stream_tbl_ptr);
525 
526 	for (i = 0; i < MAX_NUM_TID; ++i)
527 		priv->aggr_prio_tbl[i].ampdu_ap =
528 			priv->aggr_prio_tbl[i].ampdu_user;
529 }
530 
531 /*
532  * This function returns the pointer to an entry in BA Stream
533  * table which matches the given RA/TID pair.
534  */
535 struct mwifiex_tx_ba_stream_tbl *
mwifiex_get_ba_tbl(struct mwifiex_private * priv,int tid,u8 * ra)536 mwifiex_get_ba_tbl(struct mwifiex_private *priv, int tid, u8 *ra)
537 {
538 	struct mwifiex_tx_ba_stream_tbl *tx_ba_tsr_tbl;
539 
540 	spin_lock_bh(&priv->tx_ba_stream_tbl_lock);
541 	list_for_each_entry(tx_ba_tsr_tbl, &priv->tx_ba_stream_tbl_ptr, list) {
542 		if (ether_addr_equal_unaligned(tx_ba_tsr_tbl->ra, ra) &&
543 		    tx_ba_tsr_tbl->tid == tid) {
544 			spin_unlock_bh(&priv->tx_ba_stream_tbl_lock);
545 			return tx_ba_tsr_tbl;
546 		}
547 	}
548 	spin_unlock_bh(&priv->tx_ba_stream_tbl_lock);
549 	return NULL;
550 }
551 
552 /*
553  * This function creates an entry in Tx BA stream table for the
554  * given RA/TID pair.
555  */
mwifiex_create_ba_tbl(struct mwifiex_private * priv,u8 * ra,int tid,enum mwifiex_ba_status ba_status)556 void mwifiex_create_ba_tbl(struct mwifiex_private *priv, u8 *ra, int tid,
557 			   enum mwifiex_ba_status ba_status)
558 {
559 	struct mwifiex_tx_ba_stream_tbl *new_node;
560 	struct mwifiex_ra_list_tbl *ra_list;
561 	int tid_down;
562 
563 	if (!mwifiex_get_ba_tbl(priv, tid, ra)) {
564 		new_node = kzalloc(sizeof(struct mwifiex_tx_ba_stream_tbl),
565 				   GFP_ATOMIC);
566 		if (!new_node)
567 			return;
568 
569 		tid_down = mwifiex_wmm_downgrade_tid(priv, tid);
570 		ra_list = mwifiex_wmm_get_ralist_node(priv, tid_down, ra);
571 		if (ra_list) {
572 			ra_list->ba_status = ba_status;
573 			ra_list->amsdu_in_ampdu = false;
574 		}
575 		INIT_LIST_HEAD(&new_node->list);
576 
577 		new_node->tid = tid;
578 		new_node->ba_status = ba_status;
579 		memcpy(new_node->ra, ra, ETH_ALEN);
580 
581 		spin_lock_bh(&priv->tx_ba_stream_tbl_lock);
582 		list_add_tail(&new_node->list, &priv->tx_ba_stream_tbl_ptr);
583 		spin_unlock_bh(&priv->tx_ba_stream_tbl_lock);
584 	}
585 }
586 
587 /*
588  * This function sends an add BA request to the given TID/RA pair.
589  */
mwifiex_send_addba(struct mwifiex_private * priv,int tid,u8 * peer_mac)590 int mwifiex_send_addba(struct mwifiex_private *priv, int tid, u8 *peer_mac)
591 {
592 	struct host_cmd_ds_11n_addba_req add_ba_req;
593 	u32 tx_win_size = priv->add_ba_param.tx_win_size;
594 	static u8 dialog_tok;
595 	int ret;
596 	u16 block_ack_param_set;
597 
598 	mwifiex_dbg(priv->adapter, CMD, "cmd: %s: tid %d\n", __func__, tid);
599 
600 	memset(&add_ba_req, 0, sizeof(add_ba_req));
601 
602 	if ((GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA) &&
603 	    ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info) &&
604 	    priv->adapter->is_hw_11ac_capable &&
605 	    memcmp(priv->cfg_bssid, peer_mac, ETH_ALEN)) {
606 		struct mwifiex_sta_node *sta_ptr;
607 
608 		spin_lock_bh(&priv->sta_list_spinlock);
609 		sta_ptr = mwifiex_get_sta_entry(priv, peer_mac);
610 		if (!sta_ptr) {
611 			spin_unlock_bh(&priv->sta_list_spinlock);
612 			mwifiex_dbg(priv->adapter, ERROR,
613 				    "BA setup with unknown TDLS peer %pM!\n",
614 				    peer_mac);
615 			return -1;
616 		}
617 		if (sta_ptr->is_11ac_enabled)
618 			tx_win_size = MWIFIEX_11AC_STA_AMPDU_DEF_TXWINSIZE;
619 		spin_unlock_bh(&priv->sta_list_spinlock);
620 	}
621 
622 	block_ack_param_set = (u16)((tid << BLOCKACKPARAM_TID_POS) |
623 				    tx_win_size << BLOCKACKPARAM_WINSIZE_POS |
624 				    IMMEDIATE_BLOCK_ACK);
625 
626 	/* enable AMSDU inside AMPDU */
627 	if (priv->add_ba_param.tx_amsdu &&
628 	    (priv->aggr_prio_tbl[tid].amsdu != BA_STREAM_NOT_ALLOWED))
629 		block_ack_param_set |= BLOCKACKPARAM_AMSDU_SUPP_MASK;
630 
631 	add_ba_req.block_ack_param_set = cpu_to_le16(block_ack_param_set);
632 	add_ba_req.block_ack_tmo = cpu_to_le16((u16)priv->add_ba_param.timeout);
633 
634 	++dialog_tok;
635 
636 	if (dialog_tok == 0)
637 		dialog_tok = 1;
638 
639 	add_ba_req.dialog_token = dialog_tok;
640 	memcpy(&add_ba_req.peer_mac_addr, peer_mac, ETH_ALEN);
641 
642 	/* We don't wait for the response of this command */
643 	ret = mwifiex_send_cmd(priv, HostCmd_CMD_11N_ADDBA_REQ,
644 			       0, 0, &add_ba_req, false);
645 
646 	return ret;
647 }
648 
649 /*
650  * This function sends a delete BA request to the given TID/RA pair.
651  */
mwifiex_send_delba(struct mwifiex_private * priv,int tid,u8 * peer_mac,int initiator)652 int mwifiex_send_delba(struct mwifiex_private *priv, int tid, u8 *peer_mac,
653 		       int initiator)
654 {
655 	struct host_cmd_ds_11n_delba delba;
656 	int ret;
657 	uint16_t del_ba_param_set;
658 
659 	memset(&delba, 0, sizeof(delba));
660 	delba.del_ba_param_set = cpu_to_le16(tid << DELBA_TID_POS);
661 
662 	del_ba_param_set = le16_to_cpu(delba.del_ba_param_set);
663 	if (initiator)
664 		del_ba_param_set |= IEEE80211_DELBA_PARAM_INITIATOR_MASK;
665 	else
666 		del_ba_param_set &= ~IEEE80211_DELBA_PARAM_INITIATOR_MASK;
667 
668 	memcpy(&delba.peer_mac_addr, peer_mac, ETH_ALEN);
669 
670 	/* We don't wait for the response of this command */
671 	ret = mwifiex_send_cmd(priv, HostCmd_CMD_11N_DELBA,
672 			       HostCmd_ACT_GEN_SET, 0, &delba, false);
673 
674 	return ret;
675 }
676 
677 /*
678  * This function sends delba to specific tid
679  */
mwifiex_11n_delba(struct mwifiex_private * priv,int tid)680 void mwifiex_11n_delba(struct mwifiex_private *priv, int tid)
681 {
682 	struct mwifiex_rx_reorder_tbl *rx_reor_tbl_ptr;
683 
684 	spin_lock_bh(&priv->rx_reorder_tbl_lock);
685 	list_for_each_entry(rx_reor_tbl_ptr, &priv->rx_reorder_tbl_ptr, list) {
686 		if (rx_reor_tbl_ptr->tid == tid) {
687 			dev_dbg(priv->adapter->dev,
688 				"Send delba to tid=%d, %pM\n",
689 				tid, rx_reor_tbl_ptr->ta);
690 			mwifiex_send_delba(priv, tid, rx_reor_tbl_ptr->ta, 0);
691 			goto exit;
692 		}
693 	}
694 exit:
695 	spin_unlock_bh(&priv->rx_reorder_tbl_lock);
696 }
697 
698 /*
699  * This function handles the command response of a delete BA request.
700  */
mwifiex_11n_delete_ba_stream(struct mwifiex_private * priv,u8 * del_ba)701 void mwifiex_11n_delete_ba_stream(struct mwifiex_private *priv, u8 *del_ba)
702 {
703 	struct host_cmd_ds_11n_delba *cmd_del_ba =
704 		(struct host_cmd_ds_11n_delba *) del_ba;
705 	uint16_t del_ba_param_set = le16_to_cpu(cmd_del_ba->del_ba_param_set);
706 	int tid;
707 
708 	tid = del_ba_param_set >> DELBA_TID_POS;
709 
710 	mwifiex_del_ba_tbl(priv, tid, cmd_del_ba->peer_mac_addr,
711 			   TYPE_DELBA_RECEIVE, INITIATOR_BIT(del_ba_param_set));
712 }
713 
714 /*
715  * This function retrieves the Rx reordering table.
716  */
mwifiex_get_rx_reorder_tbl(struct mwifiex_private * priv,struct mwifiex_ds_rx_reorder_tbl * buf)717 int mwifiex_get_rx_reorder_tbl(struct mwifiex_private *priv,
718 			       struct mwifiex_ds_rx_reorder_tbl *buf)
719 {
720 	int i;
721 	struct mwifiex_ds_rx_reorder_tbl *rx_reo_tbl = buf;
722 	struct mwifiex_rx_reorder_tbl *rx_reorder_tbl_ptr;
723 	int count = 0;
724 
725 	spin_lock_bh(&priv->rx_reorder_tbl_lock);
726 	list_for_each_entry(rx_reorder_tbl_ptr, &priv->rx_reorder_tbl_ptr,
727 			    list) {
728 		rx_reo_tbl->tid = (u16) rx_reorder_tbl_ptr->tid;
729 		memcpy(rx_reo_tbl->ta, rx_reorder_tbl_ptr->ta, ETH_ALEN);
730 		rx_reo_tbl->start_win = rx_reorder_tbl_ptr->start_win;
731 		rx_reo_tbl->win_size = rx_reorder_tbl_ptr->win_size;
732 		for (i = 0; i < rx_reorder_tbl_ptr->win_size; ++i) {
733 			if (rx_reorder_tbl_ptr->rx_reorder_ptr[i])
734 				rx_reo_tbl->buffer[i] = true;
735 			else
736 				rx_reo_tbl->buffer[i] = false;
737 		}
738 		rx_reo_tbl++;
739 		count++;
740 
741 		if (count >= MWIFIEX_MAX_RX_BASTREAM_SUPPORTED)
742 			break;
743 	}
744 	spin_unlock_bh(&priv->rx_reorder_tbl_lock);
745 
746 	return count;
747 }
748 
749 /*
750  * This function retrieves the Tx BA stream table.
751  */
mwifiex_get_tx_ba_stream_tbl(struct mwifiex_private * priv,struct mwifiex_ds_tx_ba_stream_tbl * buf)752 int mwifiex_get_tx_ba_stream_tbl(struct mwifiex_private *priv,
753 				 struct mwifiex_ds_tx_ba_stream_tbl *buf)
754 {
755 	struct mwifiex_tx_ba_stream_tbl *tx_ba_tsr_tbl;
756 	struct mwifiex_ds_tx_ba_stream_tbl *rx_reo_tbl = buf;
757 	int count = 0;
758 
759 	spin_lock_bh(&priv->tx_ba_stream_tbl_lock);
760 	list_for_each_entry(tx_ba_tsr_tbl, &priv->tx_ba_stream_tbl_ptr, list) {
761 		rx_reo_tbl->tid = (u16) tx_ba_tsr_tbl->tid;
762 		mwifiex_dbg(priv->adapter, DATA, "data: %s tid=%d\n",
763 			    __func__, rx_reo_tbl->tid);
764 		memcpy(rx_reo_tbl->ra, tx_ba_tsr_tbl->ra, ETH_ALEN);
765 		rx_reo_tbl->amsdu = tx_ba_tsr_tbl->amsdu;
766 		rx_reo_tbl++;
767 		count++;
768 		if (count >= MWIFIEX_MAX_TX_BASTREAM_SUPPORTED)
769 			break;
770 	}
771 	spin_unlock_bh(&priv->tx_ba_stream_tbl_lock);
772 
773 	return count;
774 }
775 
776 /*
777  * This function retrieves the entry for specific tx BA stream table by RA and
778  * deletes it.
779  */
mwifiex_del_tx_ba_stream_tbl_by_ra(struct mwifiex_private * priv,u8 * ra)780 void mwifiex_del_tx_ba_stream_tbl_by_ra(struct mwifiex_private *priv, u8 *ra)
781 {
782 	struct mwifiex_tx_ba_stream_tbl *tbl, *tmp;
783 
784 	if (!ra)
785 		return;
786 
787 	spin_lock_bh(&priv->tx_ba_stream_tbl_lock);
788 	list_for_each_entry_safe(tbl, tmp, &priv->tx_ba_stream_tbl_ptr, list)
789 		if (!memcmp(tbl->ra, ra, ETH_ALEN))
790 			mwifiex_11n_delete_tx_ba_stream_tbl_entry(priv, tbl);
791 	spin_unlock_bh(&priv->tx_ba_stream_tbl_lock);
792 
793 	return;
794 }
795 
796 /* This function initializes the BlockACK setup information for given
797  * mwifiex_private structure.
798  */
mwifiex_set_ba_params(struct mwifiex_private * priv)799 void mwifiex_set_ba_params(struct mwifiex_private *priv)
800 {
801 	priv->add_ba_param.timeout = MWIFIEX_DEFAULT_BLOCK_ACK_TIMEOUT;
802 
803 	if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_UAP) {
804 		priv->add_ba_param.tx_win_size =
805 						MWIFIEX_UAP_AMPDU_DEF_TXWINSIZE;
806 		priv->add_ba_param.rx_win_size =
807 						MWIFIEX_UAP_AMPDU_DEF_RXWINSIZE;
808 	} else {
809 		priv->add_ba_param.tx_win_size =
810 						MWIFIEX_STA_AMPDU_DEF_TXWINSIZE;
811 		priv->add_ba_param.rx_win_size =
812 						MWIFIEX_STA_AMPDU_DEF_RXWINSIZE;
813 	}
814 
815 	priv->add_ba_param.tx_amsdu = true;
816 	priv->add_ba_param.rx_amsdu = true;
817 
818 	return;
819 }
820 
mwifiex_get_sec_chan_offset(int chan)821 u8 mwifiex_get_sec_chan_offset(int chan)
822 {
823 	u8 sec_offset;
824 
825 	switch (chan) {
826 	case 36:
827 	case 44:
828 	case 52:
829 	case 60:
830 	case 100:
831 	case 108:
832 	case 116:
833 	case 124:
834 	case 132:
835 	case 140:
836 	case 149:
837 	case 157:
838 		sec_offset = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
839 		break;
840 	case 40:
841 	case 48:
842 	case 56:
843 	case 64:
844 	case 104:
845 	case 112:
846 	case 120:
847 	case 128:
848 	case 136:
849 	case 144:
850 	case 153:
851 	case 161:
852 		sec_offset = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
853 		break;
854 	case 165:
855 	default:
856 		sec_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE;
857 		break;
858 	}
859 
860 	return sec_offset;
861 }
862 
863 /* This function will send DELBA to entries in the priv's
864  * Tx BA stream table
865  */
866 static void
mwifiex_send_delba_txbastream_tbl(struct mwifiex_private * priv,u8 tid)867 mwifiex_send_delba_txbastream_tbl(struct mwifiex_private *priv, u8 tid)
868 {
869 	struct mwifiex_adapter *adapter = priv->adapter;
870 	struct mwifiex_tx_ba_stream_tbl *tx_ba_stream_tbl_ptr;
871 
872 	list_for_each_entry(tx_ba_stream_tbl_ptr,
873 			    &priv->tx_ba_stream_tbl_ptr, list) {
874 		if (tx_ba_stream_tbl_ptr->ba_status == BA_SETUP_COMPLETE) {
875 			if (tid == tx_ba_stream_tbl_ptr->tid) {
876 				dev_dbg(adapter->dev,
877 					"Tx:Send delba to tid=%d, %pM\n", tid,
878 					tx_ba_stream_tbl_ptr->ra);
879 				mwifiex_send_delba(priv,
880 						   tx_ba_stream_tbl_ptr->tid,
881 						   tx_ba_stream_tbl_ptr->ra, 1);
882 				return;
883 			}
884 		}
885 	}
886 }
887 
888 /* This function updates all the tx_win_size
889  */
mwifiex_update_ampdu_txwinsize(struct mwifiex_adapter * adapter)890 void mwifiex_update_ampdu_txwinsize(struct mwifiex_adapter *adapter)
891 {
892 	u8 i;
893 	u32 tx_win_size;
894 	struct mwifiex_private *priv;
895 
896 	for (i = 0; i < adapter->priv_num; i++) {
897 		if (!adapter->priv[i])
898 			continue;
899 		priv = adapter->priv[i];
900 		tx_win_size = priv->add_ba_param.tx_win_size;
901 
902 		if (priv->bss_type == MWIFIEX_BSS_TYPE_STA)
903 			priv->add_ba_param.tx_win_size =
904 				MWIFIEX_STA_AMPDU_DEF_TXWINSIZE;
905 
906 		if (priv->bss_type == MWIFIEX_BSS_TYPE_P2P)
907 			priv->add_ba_param.tx_win_size =
908 				MWIFIEX_STA_AMPDU_DEF_TXWINSIZE;
909 
910 		if (priv->bss_type == MWIFIEX_BSS_TYPE_UAP)
911 			priv->add_ba_param.tx_win_size =
912 				MWIFIEX_UAP_AMPDU_DEF_TXWINSIZE;
913 
914 		if (adapter->coex_win_size) {
915 			if (adapter->coex_tx_win_size)
916 				priv->add_ba_param.tx_win_size =
917 					adapter->coex_tx_win_size;
918 		}
919 
920 		if (tx_win_size != priv->add_ba_param.tx_win_size) {
921 			if (!priv->media_connected)
922 				continue;
923 			for (i = 0; i < MAX_NUM_TID; i++)
924 				mwifiex_send_delba_txbastream_tbl(priv, i);
925 		}
926 	}
927 }
928