drivers/net/wireless/mwifiex/11ac.c

   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
  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
  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
 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
 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
 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  */
 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
 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
 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 }