summaryrefslogtreecommitdiff
path: root/drivers/net/wireless/mwifiex/11ac.c
blob: c92f27aa71ede1f049c101a0ba185f31d982aaa3 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
/*
 * Marvell Wireless LAN device driver: 802.11ac
 *
 * Copyright (C) 2013, Marvell International Ltd.
 *
 * This software file (the "File") is distributed by Marvell International
 * Ltd. under the terms of the GNU General Public License Version 2, June 1991
 * (the "License").  You may use, redistribute and/or modify this File in
 * accordance with the terms and conditions of the License, a copy of which
 * is available by writing to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
 * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
 *
 * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
 * ARE EXPRESSLY DISCLAIMED.  The License provides additional details about
 * this warranty disclaimer.
 */

#include "decl.h"
#include "ioctl.h"
#include "fw.h"
#include "main.h"
#include "11ac.h"

/* Tables of the MCS map to the highest data rate (in Mbps) supported
 * for long GI.
 */
static const u16 max_rate_lgi_80MHZ[8][3] = {
	{0x124, 0x15F, 0x186},	/* NSS = 1 */
	{0x249, 0x2BE, 0x30C},  /* NSS = 2 */
	{0x36D, 0x41D, 0x492},  /* NSS = 3 */
	{0x492, 0x57C, 0x618},  /* NSS = 4 */
	{0x5B6, 0x6DB, 0x79E},  /* NSS = 5 */
	{0x6DB, 0x83A, 0x0},    /* NSS = 6 */
	{0x7FF, 0x999, 0xAAA},  /* NSS = 7 */
	{0x924, 0xAF8, 0xC30}   /* NSS = 8 */
};

static const u16 max_rate_lgi_160MHZ[8][3] = {
	{0x249, 0x2BE, 0x30C},   /* NSS = 1 */
	{0x492, 0x57C, 0x618},   /* NSS = 2 */
	{0x6DB, 0x83A, 0x0},     /* NSS = 3 */
	{0x924, 0xAF8, 0xC30},   /* NSS = 4 */
	{0xB6D, 0xDB6, 0xF3C},   /* NSS = 5 */
	{0xDB6, 0x1074, 0x1248}, /* NSS = 6 */
	{0xFFF, 0x1332, 0x1554}, /* NSS = 7 */
	{0x1248, 0x15F0, 0x1860} /* NSS = 8 */
};

/* This function converts the 2-bit MCS map to the highest long GI
 * VHT data rate.
 */
static u16
mwifiex_convert_mcsmap_to_maxrate(struct mwifiex_private *priv,
				  u8 bands, u16 mcs_map)
{
	u8 i, nss, mcs;
	u16 max_rate = 0;
	u32 usr_vht_cap_info = 0;
	struct mwifiex_adapter *adapter = priv->adapter;

	if (bands & BAND_AAC)
		usr_vht_cap_info = adapter->usr_dot_11ac_dev_cap_a;
	else
		usr_vht_cap_info = adapter->usr_dot_11ac_dev_cap_bg;

	/* find the max NSS supported */
	nss = 1;
	for (i = 1; i <= 8; i++) {
		mcs = GET_VHTNSSMCS(mcs_map, i);
		if (mcs < IEEE80211_VHT_MCS_NOT_SUPPORTED)
			nss = i;
	}
	mcs = GET_VHTNSSMCS(mcs_map, nss);

	/* if mcs is 3, nss must be 1 (NSS = 1). Default mcs to MCS 0~9 */
	if (mcs == IEEE80211_VHT_MCS_NOT_SUPPORTED)
		mcs = IEEE80211_VHT_MCS_SUPPORT_0_9;

	if (GET_VHTCAP_CHWDSET(usr_vht_cap_info)) {
		/* support 160 MHz */
		max_rate = max_rate_lgi_160MHZ[nss - 1][mcs];
		if (!max_rate)
			/* MCS9 is not supported in NSS6 */
			max_rate = max_rate_lgi_160MHZ[nss - 1][mcs - 1];
	} else {
		max_rate = max_rate_lgi_80MHZ[nss - 1][mcs];
		if (!max_rate)
			/* MCS9 is not supported in NSS3 */
			max_rate = max_rate_lgi_80MHZ[nss - 1][mcs - 1];
	}

	return max_rate;
}

static void
mwifiex_fill_vht_cap_info(struct mwifiex_private *priv,
			  struct ieee80211_vht_cap *vht_cap, u8 bands)
{
	struct mwifiex_adapter *adapter = priv->adapter;

	if (bands & BAND_A)
		vht_cap->vht_cap_info =
				cpu_to_le32(adapter->usr_dot_11ac_dev_cap_a);
	else
		vht_cap->vht_cap_info =
				cpu_to_le32(adapter->usr_dot_11ac_dev_cap_bg);
}

void mwifiex_fill_vht_cap_tlv(struct mwifiex_private *priv,
			      struct ieee80211_vht_cap *vht_cap, u8 bands)
{
	struct mwifiex_adapter *adapter = priv->adapter;
	u16 mcs_map_user, mcs_map_resp, mcs_map_result;
	u16 mcs_user, mcs_resp, nss, tmp;

	/* Fill VHT cap info */
	mwifiex_fill_vht_cap_info(priv, vht_cap, bands);

	/* rx MCS Set: find the minimum of the user rx mcs and ap rx mcs */
	mcs_map_user = GET_DEVRXMCSMAP(adapter->usr_dot_11ac_mcs_support);
	mcs_map_resp = le16_to_cpu(vht_cap->supp_mcs.rx_mcs_map);
	mcs_map_result = 0;

	for (nss = 1; nss <= 8; nss++) {
		mcs_user = GET_VHTNSSMCS(mcs_map_user, nss);
		mcs_resp = GET_VHTNSSMCS(mcs_map_resp, nss);

		if ((mcs_user == IEEE80211_VHT_MCS_NOT_SUPPORTED) ||
		    (mcs_resp == IEEE80211_VHT_MCS_NOT_SUPPORTED))
			SET_VHTNSSMCS(mcs_map_result, nss,
				      IEEE80211_VHT_MCS_NOT_SUPPORTED);
		else
			SET_VHTNSSMCS(mcs_map_result, nss,
				      min(mcs_user, mcs_resp));
	}

	vht_cap->supp_mcs.rx_mcs_map = cpu_to_le16(mcs_map_result);

	tmp = mwifiex_convert_mcsmap_to_maxrate(priv, bands, mcs_map_result);
	vht_cap->supp_mcs.rx_highest = cpu_to_le16(tmp);

	/* tx MCS Set: find the minimum of the user tx mcs and ap tx mcs */
	mcs_map_user = GET_DEVTXMCSMAP(adapter->usr_dot_11ac_mcs_support);
	mcs_map_resp = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
	mcs_map_result = 0;

	for (nss = 1; nss <= 8; nss++) {
		mcs_user = GET_VHTNSSMCS(mcs_map_user, nss);
		mcs_resp = GET_VHTNSSMCS(mcs_map_resp, nss);
		if ((mcs_user == IEEE80211_VHT_MCS_NOT_SUPPORTED) ||
		    (mcs_resp == IEEE80211_VHT_MCS_NOT_SUPPORTED))
			SET_VHTNSSMCS(mcs_map_result, nss,
				      IEEE80211_VHT_MCS_NOT_SUPPORTED);
		else
			SET_VHTNSSMCS(mcs_map_result, nss,
				      min(mcs_user, mcs_resp));
	}

	vht_cap->supp_mcs.tx_mcs_map = cpu_to_le16(mcs_map_result);

	tmp = mwifiex_convert_mcsmap_to_maxrate(priv, bands, mcs_map_result);
	vht_cap->supp_mcs.tx_highest = cpu_to_le16(tmp);

	return;
}

int mwifiex_cmd_append_11ac_tlv(struct mwifiex_private *priv,
			     struct mwifiex_bssdescriptor *bss_desc,
			     u8 **buffer)
{
	struct mwifiex_ie_types_vhtcap *vht_cap;
	struct mwifiex_ie_types_oper_mode_ntf *oper_ntf;
	struct ieee_types_oper_mode_ntf *ieee_oper_ntf;
	struct mwifiex_ie_types_vht_oper *vht_op;
	struct mwifiex_adapter *adapter = priv->adapter;
	u8 supp_chwd_set;
	u32 usr_vht_cap_info;
	int ret_len = 0;

	if (bss_desc->bss_band & BAND_A)
		usr_vht_cap_info = adapter->usr_dot_11ac_dev_cap_a;
	else
		usr_vht_cap_info = adapter->usr_dot_11ac_dev_cap_bg;

	/* VHT Capabilities IE */
	if (bss_desc->bcn_vht_cap) {
		vht_cap = (struct mwifiex_ie_types_vhtcap *)*buffer;
		memset(vht_cap, 0, sizeof(*vht_cap));
		vht_cap->header.type = cpu_to_le16(WLAN_EID_VHT_CAPABILITY);
		vht_cap->header.len  =
				cpu_to_le16(sizeof(struct ieee80211_vht_cap));
		memcpy((u8 *)vht_cap + sizeof(struct mwifiex_ie_types_header),
		       (u8 *)bss_desc->bcn_vht_cap,
		       le16_to_cpu(vht_cap->header.len));

		mwifiex_fill_vht_cap_tlv(priv, &vht_cap->vht_cap,
					 bss_desc->bss_band);
		*buffer += sizeof(*vht_cap);
		ret_len += sizeof(*vht_cap);
	}

	/* VHT Operation IE */
	if (bss_desc->bcn_vht_oper) {
		if (priv->bss_mode == NL80211_IFTYPE_STATION) {
			vht_op = (struct mwifiex_ie_types_vht_oper *)*buffer;
			memset(vht_op, 0, sizeof(*vht_op));
			vht_op->header.type =
					cpu_to_le16(WLAN_EID_VHT_OPERATION);
			vht_op->header.len  = cpu_to_le16(sizeof(*vht_op) -
				      sizeof(struct mwifiex_ie_types_header));
			memcpy((u8 *)vht_op +
				sizeof(struct mwifiex_ie_types_header),
			       (u8 *)bss_desc->bcn_vht_oper +
			       sizeof(struct ieee_types_header),
			       le16_to_cpu(vht_op->header.len));

			/* negotiate the channel width and central freq
			 * and keep the central freq as the peer suggests
			 */
			supp_chwd_set = GET_VHTCAP_CHWDSET(usr_vht_cap_info);

			switch (supp_chwd_set) {
			case 0:
				vht_op->chan_width =
				     min_t(u8, IEEE80211_VHT_CHANWIDTH_80MHZ,
					   bss_desc->bcn_vht_oper->chan_width);
				break;
			case 1:
				vht_op->chan_width =
				     min_t(u8, IEEE80211_VHT_CHANWIDTH_160MHZ,
					   bss_desc->bcn_vht_oper->chan_width);
				break;
			case 2:
				vht_op->chan_width =
				     min_t(u8, IEEE80211_VHT_CHANWIDTH_80P80MHZ,
					   bss_desc->bcn_vht_oper->chan_width);
				break;
			default:
				vht_op->chan_width =
				     IEEE80211_VHT_CHANWIDTH_USE_HT;
				break;
			}

			*buffer += sizeof(*vht_op);
			ret_len += sizeof(*vht_op);
		}
	}

	/* Operating Mode Notification IE */
	if (bss_desc->oper_mode) {
		ieee_oper_ntf = bss_desc->oper_mode;
		oper_ntf = (void *)*buffer;
		memset(oper_ntf, 0, sizeof(*oper_ntf));
		oper_ntf->header.type = cpu_to_le16(WLAN_EID_OPMODE_NOTIF);
		oper_ntf->header.len = cpu_to_le16(sizeof(u8));
		oper_ntf->oper_mode = ieee_oper_ntf->oper_mode;
		*buffer += sizeof(*oper_ntf);
		ret_len += sizeof(*oper_ntf);
	}

	return ret_len;
}

int mwifiex_cmd_11ac_cfg(struct mwifiex_private *priv,
			 struct host_cmd_ds_command *cmd, u16 cmd_action,
			 struct mwifiex_11ac_vht_cfg *cfg)
{
	struct host_cmd_11ac_vht_cfg *vhtcfg = &cmd->params.vht_cfg;

	cmd->command = cpu_to_le16(HostCmd_CMD_11AC_CFG);
	cmd->size = cpu_to_le16(sizeof(struct host_cmd_11ac_vht_cfg) +
				S_DS_GEN);
	vhtcfg->action = cpu_to_le16(cmd_action);
	vhtcfg->band_config = cfg->band_config;
	vhtcfg->misc_config = cfg->misc_config;
	vhtcfg->cap_info = cpu_to_le32(cfg->cap_info);
	vhtcfg->mcs_tx_set = cpu_to_le32(cfg->mcs_tx_set);
	vhtcfg->mcs_rx_set = cpu_to_le32(cfg->mcs_rx_set);

	return 0;
}

/* This function initializes the BlockACK setup information for given
 * mwifiex_private structure for 11ac enabled networks.
 */
void mwifiex_set_11ac_ba_params(struct mwifiex_private *priv)
{
	priv->add_ba_param.timeout = MWIFIEX_DEFAULT_BLOCK_ACK_TIMEOUT;

	if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_UAP) {
		priv->add_ba_param.tx_win_size =
					   MWIFIEX_11AC_UAP_AMPDU_DEF_TXWINSIZE;
		priv->add_ba_param.rx_win_size =
					   MWIFIEX_11AC_UAP_AMPDU_DEF_RXWINSIZE;
	} else {
		priv->add_ba_param.tx_win_size =
					   MWIFIEX_11AC_STA_AMPDU_DEF_TXWINSIZE;
		priv->add_ba_param.rx_win_size =
					   MWIFIEX_11AC_STA_AMPDU_DEF_RXWINSIZE;
	}

	return;
}

bool mwifiex_is_bss_in_11ac_mode(struct mwifiex_private *priv)
{
	struct mwifiex_bssdescriptor *bss_desc;
	struct ieee80211_vht_operation *vht_oper;

	bss_desc = &priv->curr_bss_params.bss_descriptor;
	vht_oper = bss_desc->bcn_vht_oper;

	if (!bss_desc->bcn_vht_cap || !vht_oper)
		return false;

	if (vht_oper->chan_width == IEEE80211_VHT_CHANWIDTH_USE_HT)
		return false;

	return true;
}

u8 mwifiex_get_center_freq_index(struct mwifiex_private *priv, u8 band,
				 u32 pri_chan, u8 chan_bw)
{
	u8 center_freq_idx = 0;

	if (band & BAND_AAC) {
		switch (pri_chan) {
		case 36:
		case 40:
		case 44:
		case 48:
			if (chan_bw == IEEE80211_VHT_CHANWIDTH_80MHZ)
				center_freq_idx = 42;
			break;
		case 52:
		case 56:
		case 60:
		case 64:
			if (chan_bw == IEEE80211_VHT_CHANWIDTH_80MHZ)
				center_freq_idx = 58;
			else if (chan_bw == IEEE80211_VHT_CHANWIDTH_160MHZ)
				center_freq_idx = 50;
			break;
		case 100:
		case 104:
		case 108:
		case 112:
			if (chan_bw == IEEE80211_VHT_CHANWIDTH_80MHZ)
				center_freq_idx = 106;
			break;
		case 116:
		case 120:
		case 124:
		case 128:
			if (chan_bw == IEEE80211_VHT_CHANWIDTH_80MHZ)
				center_freq_idx = 122;
			else if (chan_bw == IEEE80211_VHT_CHANWIDTH_160MHZ)
				center_freq_idx = 114;
			break;
		case 132:
		case 136:
		case 140:
		case 144:
			if (chan_bw == IEEE80211_VHT_CHANWIDTH_80MHZ)
				center_freq_idx = 138;
			break;
		case 149:
		case 153:
		case 157:
		case 161:
			if (chan_bw == IEEE80211_VHT_CHANWIDTH_80MHZ)
				center_freq_idx = 155;
			break;
		default:
			center_freq_idx = 42;
		}
	}

	return center_freq_idx;
}