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

   1 /*
   2  * Marvell Wireless LAN device driver: 802.11ac
   3  *
   4  * Copyright (C) 2013, 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 /* This function converts the 2-bit MCS map to the highest long GI
  27  * VHT data rate.
  28  */
  29 static u16
  30 mwifiex_convert_mcsmap_to_maxrate(struct mwifiex_private *priv,
  31                                   u8 bands, u16 mcs_map)
  32 {
  33         u8 i, nss, max_mcs;
  34         u16 max_rate = 0;
  35         u32 usr_vht_cap_info = 0;
  36         struct mwifiex_adapter *adapter = priv->adapter;
  37         /* tables of the MCS map to the highest data rate (in Mbps)
  38          * supported for long GI
  39          */
  40         u16 max_rate_lgi_80MHZ[8][3] = {
  41                 {0x124, 0x15F, 0x186},  /* NSS = 1 */
  42                 {0x249, 0x2BE, 0x30C},  /* NSS = 2 */
  43                 {0x36D, 0x41D, 0x492},  /* NSS = 3 */
  44                 {0x492, 0x57C, 0x618},  /* NSS = 4 */
  45                 {0x5B6, 0x6DB, 0x79E},  /* NSS = 5 */
  46                 {0x6DB, 0x83A, 0x0},    /* NSS = 6 */
  47                 {0x7FF, 0x999, 0xAAA},  /* NSS = 7 */
  48                 {0x924, 0xAF8, 0xC30}   /* NSS = 8 */
  49         };
  50         u16 max_rate_lgi_160MHZ[8][3] = {
  51                 {0x249, 0x2BE, 0x30C},   /* NSS = 1 */
  52                 {0x492, 0x57C, 0x618},   /* NSS = 2 */
  53                 {0x6DB, 0x83A, 0x0},     /* NSS = 3 */
  54                 {0x924, 0xAF8, 0xC30},   /* NSS = 4 */
  55                 {0xB6D, 0xDB6, 0xF3C},   /* NSS = 5 */
  56                 {0xDB6, 0x1074, 0x1248}, /* NSS = 6 */
  57                 {0xFFF, 0x1332, 0x1554}, /* NSS = 7 */
  58                 {0x1248, 0x15F0, 0x1860} /* NSS = 8 */
  59         };
  60
  61         if (bands & BAND_AAC)
  62                 usr_vht_cap_info = adapter->usr_dot_11ac_dev_cap_a;
  63         else
  64                 usr_vht_cap_info = adapter->usr_dot_11ac_dev_cap_bg;
  65
  66         /* find the max NSS supported */
  67         nss = 0;
  68         for (i = 0; i < 8; i++) {
  69                 max_mcs = (mcs_map >> (2 * i)) & 0x3;
  70                 if (max_mcs < 3)
  71                         nss = i;
  72         }
  73         max_mcs = (mcs_map >> (2 * nss)) & 0x3;
  74
  75         /* if max_mcs is 3, nss must be 0 (SS = 1). Thus, max mcs is MCS 9 */
  76         if (max_mcs >= 3)
  77                 max_mcs = 2;
  78
  79         if (GET_VHTCAP_CHWDSET(usr_vht_cap_info)) {
  80                 /* support 160 MHz */
  81                 max_rate = max_rate_lgi_160MHZ[nss][max_mcs];
  82                 if (!max_rate)
  83                         /* MCS9 is not supported in NSS6 */
  84                         max_rate = max_rate_lgi_160MHZ[nss][max_mcs - 1];
  85         } else {
  86                 max_rate = max_rate_lgi_80MHZ[nss][max_mcs];
  87                 if (!max_rate)
  88                         /* MCS9 is not supported in NSS3 */
  89                         max_rate = max_rate_lgi_80MHZ[nss][max_mcs - 1];
  90         }
  91
  92         return max_rate;
  93 }
  94
  95 static void
  96 mwifiex_fill_vht_cap_info(struct mwifiex_private *priv,
  97                           struct mwifiex_ie_types_vhtcap *vht_cap, u8 bands)
  98 {
  99         struct mwifiex_adapter *adapter = priv->adapter;
 100
 101         if (bands & BAND_A)
 102                 vht_cap->vht_cap.vht_cap_info =
 103                                 cpu_to_le32(adapter->usr_dot_11ac_dev_cap_a);
 104         else
 105                 vht_cap->vht_cap.vht_cap_info =
 106                                 cpu_to_le32(adapter->usr_dot_11ac_dev_cap_bg);
 107 }
 108
 109 static void
 110 mwifiex_fill_vht_cap_tlv(struct mwifiex_private *priv,
 111                          struct mwifiex_ie_types_vhtcap *vht_cap, u8 bands)
 112 {
 113         struct mwifiex_adapter *adapter = priv->adapter;
 114         u16 mcs_map_user, mcs_map_resp, mcs_map_result;
 115         u16 mcs_user, mcs_resp, nss, tmp;
 116
 117         /* Fill VHT cap info */
 118         mwifiex_fill_vht_cap_info(priv, vht_cap, bands);
 119
 120         /* rx MCS Set: find the minimum of the user rx mcs and ap rx mcs */
 121         mcs_map_user = GET_DEVRXMCSMAP(adapter->usr_dot_11ac_mcs_support);
 122         mcs_map_resp = le16_to_cpu(vht_cap->vht_cap.supp_mcs.rx_mcs_map);
 123         mcs_map_result = 0;
 124
 125         for (nss = 1; nss <= 8; nss++) {
 126                 mcs_user = GET_VHTNSSMCS(mcs_map_user, nss);
 127                 mcs_resp = GET_VHTNSSMCS(mcs_map_resp, nss);
 128
 129                 if ((mcs_user == NO_NSS_SUPPORT) ||
 130                     (mcs_resp == NO_NSS_SUPPORT))
 131                         SET_VHTNSSMCS(mcs_map_result, nss, NO_NSS_SUPPORT);
 132                 else
 133                         SET_VHTNSSMCS(mcs_map_result, nss,
 134                                       min(mcs_user, mcs_resp));
 135         }
 136
 137         vht_cap->vht_cap.supp_mcs.rx_mcs_map = cpu_to_le16(mcs_map_result);
 138
 139         tmp = mwifiex_convert_mcsmap_to_maxrate(priv, bands, mcs_map_result);
 140         vht_cap->vht_cap.supp_mcs.rx_highest = cpu_to_le16(tmp);
 141
 142         /* tx MCS Set: find the minimum of the user tx mcs and ap tx mcs */
 143         mcs_map_user = GET_DEVTXMCSMAP(adapter->usr_dot_11ac_mcs_support);
 144         mcs_map_resp = le16_to_cpu(vht_cap->vht_cap.supp_mcs.tx_mcs_map);
 145         mcs_map_result = 0;
 146
 147         for (nss = 1; nss <= 8; nss++) {
 148                 mcs_user = GET_VHTNSSMCS(mcs_map_user, nss);
 149                 mcs_resp = GET_VHTNSSMCS(mcs_map_resp, nss);
 150                 if ((mcs_user == NO_NSS_SUPPORT) ||
 151                     (mcs_resp == NO_NSS_SUPPORT))
 152                         SET_VHTNSSMCS(mcs_map_result, nss, NO_NSS_SUPPORT);
 153                 else
 154                         SET_VHTNSSMCS(mcs_map_result, nss,
 155                                       min(mcs_user, mcs_resp));
 156         }
 157
 158         vht_cap->vht_cap.supp_mcs.tx_mcs_map = cpu_to_le16(mcs_map_result);
 159
 160         tmp = mwifiex_convert_mcsmap_to_maxrate(priv, bands, mcs_map_result);
 161         vht_cap->vht_cap.supp_mcs.tx_highest = cpu_to_le16(tmp);
 162
 163         return;
 164 }
 165
 166 int mwifiex_cmd_append_11ac_tlv(struct mwifiex_private *priv,
 167                              struct mwifiex_bssdescriptor *bss_desc,
 168                              u8 **buffer)
 169 {
 170         struct mwifiex_ie_types_vhtcap *vht_cap;
 171         struct mwifiex_ie_types_oper_mode_ntf *oper_ntf;
 172         struct ieee_types_oper_mode_ntf *ieee_oper_ntf;
 173         struct mwifiex_ie_types_vht_oper *vht_op;
 174         struct mwifiex_adapter *adapter = priv->adapter;
 175         u8 supp_chwd_set;
 176         u32 usr_vht_cap_info;
 177         int ret_len = 0;
 178
 179         if (bss_desc->bss_band & BAND_A)
 180                 usr_vht_cap_info = adapter->usr_dot_11ac_dev_cap_a;
 181         else
 182                 usr_vht_cap_info = adapter->usr_dot_11ac_dev_cap_bg;
 183
 184         /* VHT Capabilities IE */
 185         if (bss_desc->bcn_vht_cap) {
 186                 vht_cap = (struct mwifiex_ie_types_vhtcap *)*buffer;
 187                 memset(vht_cap, 0, sizeof(*vht_cap));
 188                 vht_cap->header.type = cpu_to_le16(WLAN_EID_VHT_CAPABILITY);
 189                 vht_cap->header.len  =
 190                                 cpu_to_le16(sizeof(struct ieee80211_vht_cap));
 191                 memcpy((u8 *)vht_cap + sizeof(struct mwifiex_ie_types_header),
 192                        (u8 *)bss_desc->bcn_vht_cap +
 193                        sizeof(struct ieee_types_header),
 194                        le16_to_cpu(vht_cap->header.len));
 195
 196                 mwifiex_fill_vht_cap_tlv(priv, vht_cap, bss_desc->bss_band);
 197                 *buffer += sizeof(*vht_cap);
 198                 ret_len += sizeof(*vht_cap);
 199         }
 200
 201         /* VHT Operation IE */
 202         if (bss_desc->bcn_vht_oper) {
 203                 if (priv->bss_mode == NL80211_IFTYPE_STATION) {
 204                         vht_op = (struct mwifiex_ie_types_vht_oper *)*buffer;
 205                         memset(vht_op, 0, sizeof(*vht_op));
 206                         vht_op->header.type =
 207                                         cpu_to_le16(WLAN_EID_VHT_OPERATION);
 208                         vht_op->header.len  = cpu_to_le16(sizeof(*vht_op) -
 209                                       sizeof(struct mwifiex_ie_types_header));
 210                         memcpy((u8 *)vht_op +
 211                                 sizeof(struct mwifiex_ie_types_header),
 212                                (u8 *)bss_desc->bcn_vht_oper +
 213                                sizeof(struct ieee_types_header),
 214                                le16_to_cpu(vht_op->header.len));
 215
 216                         /* negotiate the channel width and central freq
 217                          * and keep the central freq as the peer suggests
 218                          */
 219                         supp_chwd_set = GET_VHTCAP_CHWDSET(usr_vht_cap_info);
 220
 221                         switch (supp_chwd_set) {
 222                         case 0:
 223                                 vht_op->chan_width =
 224                                      min_t(u8, IEEE80211_VHT_CHANWIDTH_80MHZ,
 225                                            bss_desc->bcn_vht_oper->chan_width);
 226                                 break;
 227                         case 1:
 228                                 vht_op->chan_width =
 229                                      min_t(u8, IEEE80211_VHT_CHANWIDTH_160MHZ,
 230                                            bss_desc->bcn_vht_oper->chan_width);
 231                                 break;
 232                         case 2:
 233                                 vht_op->chan_width =
 234                                      min_t(u8, IEEE80211_VHT_CHANWIDTH_80P80MHZ,
 235                                            bss_desc->bcn_vht_oper->chan_width);
 236                                 break;
 237                         default:
 238                                 vht_op->chan_width =
 239                                      IEEE80211_VHT_CHANWIDTH_USE_HT;
 240                                 break;
 241                         }
 242
 243                         *buffer += sizeof(*vht_op);
 244                         ret_len += sizeof(*vht_op);
 245                 }
 246         }
 247
 248         /* Operating Mode Notification IE */
 249         if (bss_desc->oper_mode) {
 250                 ieee_oper_ntf = bss_desc->oper_mode;
 251                 oper_ntf = (void *)*buffer;
 252                 memset(oper_ntf, 0, sizeof(*oper_ntf));
 253                 oper_ntf->header.type = cpu_to_le16(WLAN_EID_OPMODE_NOTIF);
 254                 oper_ntf->header.len = cpu_to_le16(sizeof(u8));
 255                 oper_ntf->oper_mode = ieee_oper_ntf->oper_mode;
 256                 *buffer += sizeof(*oper_ntf);
 257                 ret_len += sizeof(*oper_ntf);
 258         }
 259
 260         return ret_len;
 261 }
 262
 263 int mwifiex_cmd_11ac_cfg(struct mwifiex_private *priv,
 264                          struct host_cmd_ds_command *cmd, u16 cmd_action,
 265                          struct mwifiex_11ac_vht_cfg *cfg)
 266 {
 267         struct host_cmd_11ac_vht_cfg *vhtcfg = &cmd->params.vht_cfg;
 268
 269         cmd->command = cpu_to_le16(HostCmd_CMD_11AC_CFG);
 270         cmd->size = cpu_to_le16(sizeof(struct host_cmd_11ac_vht_cfg) +
 271                                 S_DS_GEN);
 272         vhtcfg->action = cpu_to_le16(cmd_action);
 273         vhtcfg->band_config = cfg->band_config;
 274         vhtcfg->misc_config = cfg->misc_config;
 275         vhtcfg->cap_info = cpu_to_le32(cfg->cap_info);
 276         vhtcfg->mcs_tx_set = cpu_to_le32(cfg->mcs_tx_set);
 277         vhtcfg->mcs_rx_set = cpu_to_le32(cfg->mcs_rx_set);
 278
 279         return 0;
 280 }
 281
 282 /* This function initializes the BlockACK setup information for given
 283  * mwifiex_private structure for 11ac enabled networks.
 284  */
 285 void mwifiex_set_11ac_ba_params(struct mwifiex_private *priv)
 286 {
 287         priv->add_ba_param.timeout = MWIFIEX_DEFAULT_BLOCK_ACK_TIMEOUT;
 288
 289         if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_UAP) {
 290                 priv->add_ba_param.tx_win_size =
 291                                            MWIFIEX_11AC_UAP_AMPDU_DEF_TXWINSIZE;
 292                 priv->add_ba_param.rx_win_size =
 293                                            MWIFIEX_11AC_UAP_AMPDU_DEF_RXWINSIZE;
 294         } else {
 295                 priv->add_ba_param.tx_win_size =
 296                                            MWIFIEX_11AC_STA_AMPDU_DEF_TXWINSIZE;
 297                 priv->add_ba_param.rx_win_size =
 298                                            MWIFIEX_11AC_STA_AMPDU_DEF_RXWINSIZE;
 299         }
 300
 301         return;
 302 }