1 /*
2 * Marvell Wireless LAN device driver: 802.11ac
3 *
4 * Copyright (C) 2013-2014, 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 "fw.h"
23 #include "main.h"
24 #include "11ac.h"
25
26 /* Tables of the MCS map to the highest data rate (in Mbps) supported
27 * for long GI.
28 */
29 static const u16 max_rate_lgi_80MHZ[8][3] = {
30 {0x124, 0x15F, 0x186}, /* NSS = 1 */
31 {0x249, 0x2BE, 0x30C}, /* NSS = 2 */
32 {0x36D, 0x41D, 0x492}, /* NSS = 3 */
33 {0x492, 0x57C, 0x618}, /* NSS = 4 */
34 {0x5B6, 0x6DB, 0x79E}, /* NSS = 5 */
35 {0x6DB, 0x83A, 0x0}, /* NSS = 6 */
36 {0x7FF, 0x999, 0xAAA}, /* NSS = 7 */
37 {0x924, 0xAF8, 0xC30} /* NSS = 8 */
38 };
39
40 static const u16 max_rate_lgi_160MHZ[8][3] = {
41 {0x249, 0x2BE, 0x30C}, /* NSS = 1 */
42 {0x492, 0x57C, 0x618}, /* NSS = 2 */
43 {0x6DB, 0x83A, 0x0}, /* NSS = 3 */
44 {0x924, 0xAF8, 0xC30}, /* NSS = 4 */
45 {0xB6D, 0xDB6, 0xF3C}, /* NSS = 5 */
46 {0xDB6, 0x1074, 0x1248}, /* NSS = 6 */
47 {0xFFF, 0x1332, 0x1554}, /* NSS = 7 */
48 {0x1248, 0x15F0, 0x1860} /* NSS = 8 */
49 };
50
51 /* This function converts the 2-bit MCS map to the highest long GI
52 * VHT data rate.
53 */
54 static u16
mwifiex_convert_mcsmap_to_maxrate(struct mwifiex_private * priv,u8 bands,u16 mcs_map)55 mwifiex_convert_mcsmap_to_maxrate(struct mwifiex_private *priv,
56 u8 bands, u16 mcs_map)
57 {
58 u8 i, nss, mcs;
59 u16 max_rate = 0;
60 u32 usr_vht_cap_info = 0;
61 struct mwifiex_adapter *adapter = priv->adapter;
62
63 if (bands & BAND_AAC)
64 usr_vht_cap_info = adapter->usr_dot_11ac_dev_cap_a;
65 else
66 usr_vht_cap_info = adapter->usr_dot_11ac_dev_cap_bg;
67
68 /* find the max NSS supported */
69 nss = 1;
70 for (i = 1; i <= 8; i++) {
71 mcs = GET_VHTNSSMCS(mcs_map, i);
72 if (mcs < IEEE80211_VHT_MCS_NOT_SUPPORTED)
73 nss = i;
74 }
75 mcs = GET_VHTNSSMCS(mcs_map, nss);
76
77 /* if mcs is 3, nss must be 1 (NSS = 1). Default mcs to MCS 0~9 */
78 if (mcs == IEEE80211_VHT_MCS_NOT_SUPPORTED)
79 mcs = IEEE80211_VHT_MCS_SUPPORT_0_9;
80
81 if (GET_VHTCAP_CHWDSET(usr_vht_cap_info)) {
82 /* support 160 MHz */
83 max_rate = max_rate_lgi_160MHZ[nss - 1][mcs];
84 if (!max_rate)
85 /* MCS9 is not supported in NSS6 */
86 max_rate = max_rate_lgi_160MHZ[nss - 1][mcs - 1];
87 } else {
88 max_rate = max_rate_lgi_80MHZ[nss - 1][mcs];
89 if (!max_rate)
90 /* MCS9 is not supported in NSS3 */
91 max_rate = max_rate_lgi_80MHZ[nss - 1][mcs - 1];
92 }
93
94 return max_rate;
95 }
96
97 static void
mwifiex_fill_vht_cap_info(struct mwifiex_private * priv,struct ieee80211_vht_cap * vht_cap,u8 bands)98 mwifiex_fill_vht_cap_info(struct mwifiex_private *priv,
99 struct ieee80211_vht_cap *vht_cap, u8 bands)
100 {
101 struct mwifiex_adapter *adapter = priv->adapter;
102
103 if (bands & BAND_A)
104 vht_cap->vht_cap_info =
105 cpu_to_le32(adapter->usr_dot_11ac_dev_cap_a);
106 else
107 vht_cap->vht_cap_info =
108 cpu_to_le32(adapter->usr_dot_11ac_dev_cap_bg);
109 }
110
mwifiex_fill_vht_cap_tlv(struct mwifiex_private * priv,struct ieee80211_vht_cap * vht_cap,u8 bands)111 void mwifiex_fill_vht_cap_tlv(struct mwifiex_private *priv,
112 struct ieee80211_vht_cap *vht_cap, u8 bands)
113 {
114 struct mwifiex_adapter *adapter = priv->adapter;
115 u16 mcs_map_user, mcs_map_resp, mcs_map_result;
116 u16 mcs_user, mcs_resp, nss, tmp;
117
118 /* Fill VHT cap info */
119 mwifiex_fill_vht_cap_info(priv, vht_cap, bands);
120
121 /* rx MCS Set: find the minimum of the user rx mcs and ap rx mcs */
122 mcs_map_user = GET_DEVRXMCSMAP(adapter->usr_dot_11ac_mcs_support);
123 mcs_map_resp = le16_to_cpu(vht_cap->supp_mcs.rx_mcs_map);
124 mcs_map_result = 0;
125
126 for (nss = 1; nss <= 8; nss++) {
127 mcs_user = GET_VHTNSSMCS(mcs_map_user, nss);
128 mcs_resp = GET_VHTNSSMCS(mcs_map_resp, nss);
129
130 if ((mcs_user == IEEE80211_VHT_MCS_NOT_SUPPORTED) ||
131 (mcs_resp == IEEE80211_VHT_MCS_NOT_SUPPORTED))
132 SET_VHTNSSMCS(mcs_map_result, nss,
133 IEEE80211_VHT_MCS_NOT_SUPPORTED);
134 else
135 SET_VHTNSSMCS(mcs_map_result, nss,
136 min(mcs_user, mcs_resp));
137 }
138
139 vht_cap->supp_mcs.rx_mcs_map = cpu_to_le16(mcs_map_result);
140
141 tmp = mwifiex_convert_mcsmap_to_maxrate(priv, bands, mcs_map_result);
142 vht_cap->supp_mcs.rx_highest = cpu_to_le16(tmp);
143
144 /* tx MCS Set: find the minimum of the user tx mcs and ap tx mcs */
145 mcs_map_user = GET_DEVTXMCSMAP(adapter->usr_dot_11ac_mcs_support);
146 mcs_map_resp = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
147 mcs_map_result = 0;
148
149 for (nss = 1; nss <= 8; nss++) {
150 mcs_user = GET_VHTNSSMCS(mcs_map_user, nss);
151 mcs_resp = GET_VHTNSSMCS(mcs_map_resp, nss);
152 if ((mcs_user == IEEE80211_VHT_MCS_NOT_SUPPORTED) ||
153 (mcs_resp == IEEE80211_VHT_MCS_NOT_SUPPORTED))
154 SET_VHTNSSMCS(mcs_map_result, nss,
155 IEEE80211_VHT_MCS_NOT_SUPPORTED);
156 else
157 SET_VHTNSSMCS(mcs_map_result, nss,
158 min(mcs_user, mcs_resp));
159 }
160
161 vht_cap->supp_mcs.tx_mcs_map = cpu_to_le16(mcs_map_result);
162
163 tmp = mwifiex_convert_mcsmap_to_maxrate(priv, bands, mcs_map_result);
164 vht_cap->supp_mcs.tx_highest = cpu_to_le16(tmp);
165
166 return;
167 }
168
mwifiex_cmd_append_11ac_tlv(struct mwifiex_private * priv,struct mwifiex_bssdescriptor * bss_desc,u8 ** buffer)169 int mwifiex_cmd_append_11ac_tlv(struct mwifiex_private *priv,
170 struct mwifiex_bssdescriptor *bss_desc,
171 u8 **buffer)
172 {
173 struct mwifiex_ie_types_vhtcap *vht_cap;
174 struct mwifiex_ie_types_oper_mode_ntf *oper_ntf;
175 struct ieee_types_oper_mode_ntf *ieee_oper_ntf;
176 struct mwifiex_ie_types_vht_oper *vht_op;
177 struct mwifiex_adapter *adapter = priv->adapter;
178 u8 supp_chwd_set;
179 u32 usr_vht_cap_info;
180 int ret_len = 0;
181
182 if (bss_desc->bss_band & BAND_A)
183 usr_vht_cap_info = adapter->usr_dot_11ac_dev_cap_a;
184 else
185 usr_vht_cap_info = adapter->usr_dot_11ac_dev_cap_bg;
186
187 /* VHT Capabilities IE */
188 if (bss_desc->bcn_vht_cap) {
189 vht_cap = (struct mwifiex_ie_types_vhtcap *)*buffer;
190 memset(vht_cap, 0, sizeof(*vht_cap));
191 vht_cap->header.type = cpu_to_le16(WLAN_EID_VHT_CAPABILITY);
192 vht_cap->header.len =
193 cpu_to_le16(sizeof(struct ieee80211_vht_cap));
194 memcpy((u8 *)vht_cap + sizeof(struct mwifiex_ie_types_header),
195 (u8 *)bss_desc->bcn_vht_cap,
196 le16_to_cpu(vht_cap->header.len));
197
198 mwifiex_fill_vht_cap_tlv(priv, &vht_cap->vht_cap,
199 bss_desc->bss_band);
200 *buffer += sizeof(*vht_cap);
201 ret_len += sizeof(*vht_cap);
202 }
203
204 /* VHT Operation IE */
205 if (bss_desc->bcn_vht_oper) {
206 if (priv->bss_mode == NL80211_IFTYPE_STATION) {
207 vht_op = (struct mwifiex_ie_types_vht_oper *)*buffer;
208 memset(vht_op, 0, sizeof(*vht_op));
209 vht_op->header.type =
210 cpu_to_le16(WLAN_EID_VHT_OPERATION);
211 vht_op->header.len = cpu_to_le16(sizeof(*vht_op) -
212 sizeof(struct mwifiex_ie_types_header));
213 memcpy((u8 *)vht_op +
214 sizeof(struct mwifiex_ie_types_header),
215 (u8 *)bss_desc->bcn_vht_oper,
216 le16_to_cpu(vht_op->header.len));
217
218 /* negotiate the channel width and central freq
219 * and keep the central freq as the peer suggests
220 */
221 supp_chwd_set = GET_VHTCAP_CHWDSET(usr_vht_cap_info);
222
223 switch (supp_chwd_set) {
224 case 0:
225 vht_op->chan_width =
226 min_t(u8, IEEE80211_VHT_CHANWIDTH_80MHZ,
227 bss_desc->bcn_vht_oper->chan_width);
228 break;
229 case 1:
230 vht_op->chan_width =
231 min_t(u8, IEEE80211_VHT_CHANWIDTH_160MHZ,
232 bss_desc->bcn_vht_oper->chan_width);
233 break;
234 case 2:
235 vht_op->chan_width =
236 min_t(u8, IEEE80211_VHT_CHANWIDTH_80P80MHZ,
237 bss_desc->bcn_vht_oper->chan_width);
238 break;
239 default:
240 vht_op->chan_width =
241 IEEE80211_VHT_CHANWIDTH_USE_HT;
242 break;
243 }
244
245 *buffer += sizeof(*vht_op);
246 ret_len += sizeof(*vht_op);
247 }
248 }
249
250 /* Operating Mode Notification IE */
251 if (bss_desc->oper_mode) {
252 ieee_oper_ntf = bss_desc->oper_mode;
253 oper_ntf = (void *)*buffer;
254 memset(oper_ntf, 0, sizeof(*oper_ntf));
255 oper_ntf->header.type = cpu_to_le16(WLAN_EID_OPMODE_NOTIF);
256 oper_ntf->header.len = cpu_to_le16(sizeof(u8));
257 oper_ntf->oper_mode = ieee_oper_ntf->oper_mode;
258 *buffer += sizeof(*oper_ntf);
259 ret_len += sizeof(*oper_ntf);
260 }
261
262 return ret_len;
263 }
264
mwifiex_cmd_11ac_cfg(struct mwifiex_private * priv,struct host_cmd_ds_command * cmd,u16 cmd_action,struct mwifiex_11ac_vht_cfg * cfg)265 int mwifiex_cmd_11ac_cfg(struct mwifiex_private *priv,
266 struct host_cmd_ds_command *cmd, u16 cmd_action,
267 struct mwifiex_11ac_vht_cfg *cfg)
268 {
269 struct host_cmd_11ac_vht_cfg *vhtcfg = &cmd->params.vht_cfg;
270
271 cmd->command = cpu_to_le16(HostCmd_CMD_11AC_CFG);
272 cmd->size = cpu_to_le16(sizeof(struct host_cmd_11ac_vht_cfg) +
273 S_DS_GEN);
274 vhtcfg->action = cpu_to_le16(cmd_action);
275 vhtcfg->band_config = cfg->band_config;
276 vhtcfg->misc_config = cfg->misc_config;
277 vhtcfg->cap_info = cpu_to_le32(cfg->cap_info);
278 vhtcfg->mcs_tx_set = cpu_to_le32(cfg->mcs_tx_set);
279 vhtcfg->mcs_rx_set = cpu_to_le32(cfg->mcs_rx_set);
280
281 return 0;
282 }
283
284 /* This function initializes the BlockACK setup information for given
285 * mwifiex_private structure for 11ac enabled networks.
286 */
mwifiex_set_11ac_ba_params(struct mwifiex_private * priv)287 void mwifiex_set_11ac_ba_params(struct mwifiex_private *priv)
288 {
289 priv->add_ba_param.timeout = MWIFIEX_DEFAULT_BLOCK_ACK_TIMEOUT;
290
291 if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_UAP) {
292 priv->add_ba_param.tx_win_size =
293 MWIFIEX_11AC_UAP_AMPDU_DEF_TXWINSIZE;
294 priv->add_ba_param.rx_win_size =
295 MWIFIEX_11AC_UAP_AMPDU_DEF_RXWINSIZE;
296 } else {
297 priv->add_ba_param.tx_win_size =
298 MWIFIEX_11AC_STA_AMPDU_DEF_TXWINSIZE;
299 priv->add_ba_param.rx_win_size =
300 MWIFIEX_11AC_STA_AMPDU_DEF_RXWINSIZE;
301 }
302
303 return;
304 }
305
mwifiex_is_bss_in_11ac_mode(struct mwifiex_private * priv)306 bool mwifiex_is_bss_in_11ac_mode(struct mwifiex_private *priv)
307 {
308 struct mwifiex_bssdescriptor *bss_desc;
309 struct ieee80211_vht_operation *vht_oper;
310
311 bss_desc = &priv->curr_bss_params.bss_descriptor;
312 vht_oper = bss_desc->bcn_vht_oper;
313
314 if (!bss_desc->bcn_vht_cap || !vht_oper)
315 return false;
316
317 if (vht_oper->chan_width == IEEE80211_VHT_CHANWIDTH_USE_HT)
318 return false;
319
320 return true;
321 }
322
mwifiex_get_center_freq_index(struct mwifiex_private * priv,u8 band,u32 pri_chan,u8 chan_bw)323 u8 mwifiex_get_center_freq_index(struct mwifiex_private *priv, u8 band,
324 u32 pri_chan, u8 chan_bw)
325 {
326 u8 center_freq_idx = 0;
327
328 if (band & BAND_AAC) {
329 switch (pri_chan) {
330 case 36:
331 case 40:
332 case 44:
333 case 48:
334 if (chan_bw == IEEE80211_VHT_CHANWIDTH_80MHZ)
335 center_freq_idx = 42;
336 break;
337 case 52:
338 case 56:
339 case 60:
340 case 64:
341 if (chan_bw == IEEE80211_VHT_CHANWIDTH_80MHZ)
342 center_freq_idx = 58;
343 else if (chan_bw == IEEE80211_VHT_CHANWIDTH_160MHZ)
344 center_freq_idx = 50;
345 break;
346 case 100:
347 case 104:
348 case 108:
349 case 112:
350 if (chan_bw == IEEE80211_VHT_CHANWIDTH_80MHZ)
351 center_freq_idx = 106;
352 break;
353 case 116:
354 case 120:
355 case 124:
356 case 128:
357 if (chan_bw == IEEE80211_VHT_CHANWIDTH_80MHZ)
358 center_freq_idx = 122;
359 else if (chan_bw == IEEE80211_VHT_CHANWIDTH_160MHZ)
360 center_freq_idx = 114;
361 break;
362 case 132:
363 case 136:
364 case 140:
365 case 144:
366 if (chan_bw == IEEE80211_VHT_CHANWIDTH_80MHZ)
367 center_freq_idx = 138;
368 break;
369 case 149:
370 case 153:
371 case 157:
372 case 161:
373 if (chan_bw == IEEE80211_VHT_CHANWIDTH_80MHZ)
374 center_freq_idx = 155;
375 break;
376 default:
377 center_freq_idx = 42;
378 }
379 }
380
381 return center_freq_idx;
382 }
383