mwifiex: add VHT support for TDLS
authorAvinash Patil <patila@marvell.com>
Sat, 8 Feb 2014 00:30:39 +0000 (16:30 -0800)
committerJohn W. Linville <linville@tuxdriver.com>
Wed, 12 Feb 2014 20:36:24 +0000 (15:36 -0500)
During TDLS setup request/response, if HW is 11ac capable,
we add VHT Capability IEs in outgoing data frame. Also while
processing received setup request/response, we preserve peer's
11ac capability retrieved from IEs.

Patch also gets VHT parameters from config_station handlers and
sets it to FW using TDLS config command.

Signed-off-by: Avinash Patil <patila@marvell.com>
Signed-off-by: Bing Zhao <bzhao@marvell.com>
Signed-off-by: Amitkumar Karwar <akarwar@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
drivers/net/wireless/mwifiex/11ac.c
drivers/net/wireless/mwifiex/11ac.h
drivers/net/wireless/mwifiex/fw.h
drivers/net/wireless/mwifiex/main.h
drivers/net/wireless/mwifiex/sta_cmd.c
drivers/net/wireless/mwifiex/tdls.c

index 5895bc8..bb43251 100644 (file)
@@ -108,9 +108,8 @@ mwifiex_fill_vht_cap_info(struct mwifiex_private *priv,
                                cpu_to_le32(adapter->usr_dot_11ac_dev_cap_bg);
 }
 
-static void
-mwifiex_fill_vht_cap_tlv(struct mwifiex_private *priv,
-                        struct ieee80211_vht_cap *vht_cap, u8 bands)
+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;
@@ -305,3 +304,81 @@ void mwifiex_set_11ac_ba_params(struct mwifiex_private *priv)
 
        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;
+}
index 7c2c69b..0b02cb6 100644 (file)
@@ -40,4 +40,6 @@ int mwifiex_cmd_append_11ac_tlv(struct mwifiex_private *priv,
 int mwifiex_cmd_11ac_cfg(struct mwifiex_private *priv,
                         struct host_cmd_ds_command *cmd, u16 cmd_action,
                         struct mwifiex_11ac_vht_cfg *cfg);
+void mwifiex_fill_vht_cap_tlv(struct mwifiex_private *priv,
+                             struct ieee80211_vht_cap *vht_cap, u8 bands);
 #endif /* _MWIFIEX_11AC_H_ */
index 8c119bc..2344abd 100644 (file)
@@ -1356,6 +1356,11 @@ struct mwifiex_ie_types_vhtcap {
        struct ieee80211_vht_cap vht_cap;
 } __packed;
 
+struct mwifiex_ie_types_aid {
+       struct mwifiex_ie_types_header header;
+       __le16 aid;
+} __packed;
+
 struct mwifiex_ie_types_oper_mode_ntf {
        struct mwifiex_ie_types_header header;
        u8 oper_mode;
index 6d49d99..91df7ee 100644 (file)
@@ -273,6 +273,21 @@ struct ieee_types_extcap {
        u8 ext_capab[8];
 } __packed;
 
+struct ieee_types_vht_cap {
+       struct ieee_types_header ieee_hdr;
+       struct ieee80211_vht_cap vhtcap;
+} __packed;
+
+struct ieee_types_vht_oper {
+       struct ieee_types_header ieee_hdr;
+       struct ieee80211_vht_operation vhtoper;
+} __packed;
+
+struct ieee_types_aid {
+       struct ieee_types_header ieee_hdr;
+       u16 aid;
+} __packed;
+
 struct mwifiex_bssdescriptor {
        u8 mac_address[ETH_ALEN];
        struct cfg80211_ssid ssid;
@@ -603,10 +618,13 @@ struct mwifiex_tdls_capab {
        u8 rates_len;
        u8 qos_info;
        u8 coex_2040;
+       u16 aid;
        struct ieee80211_ht_cap ht_capb;
        struct ieee80211_ht_operation ht_oper;
        struct ieee_types_extcap extcap;
        struct ieee_types_generic rsn_ie;
+       struct ieee80211_vht_cap vhtcap;
+       struct ieee80211_vht_operation vhtoper;
 };
 
 /* This is AP/TDLS specific structure which stores information
@@ -617,6 +635,7 @@ struct mwifiex_sta_node {
        u8 mac_addr[ETH_ALEN];
        u8 is_wmm_enabled;
        u8 is_11n_enabled;
+       u8 is_11ac_enabled;
        u8 ampdu_sta[MAX_NUM_TID];
        u16 rx_seq[MAX_NUM_TID];
        u16 max_amsdu;
@@ -1215,6 +1234,9 @@ void mwifiex_process_tdls_action_frame(struct mwifiex_private *priv,
                                       u8 *buf, int len);
 int mwifiex_tdls_oper(struct mwifiex_private *priv, u8 *peer, u8 action);
 int mwifiex_get_tdls_link_status(struct mwifiex_private *priv, u8 *mac);
+bool mwifiex_is_bss_in_11ac_mode(struct mwifiex_private *priv);
+u8 mwifiex_get_center_freq_index(struct mwifiex_private *priv, u8 band,
+                                u32 pri_chan, u8 chan_bw);
 
 #ifdef CONFIG_DEBUG_FS
 void mwifiex_debugfs_init(void);
index 8f1bcc3..b10425c 100644 (file)
@@ -1292,6 +1292,8 @@ mwifiex_cmd_tdls_oper(struct mwifiex_private *priv,
        struct mwifiex_ie_types_htcap *ht_capab;
        struct mwifiex_ie_types_qos_info *wmm_qos_info;
        struct mwifiex_ie_types_extcap *extcap;
+       struct mwifiex_ie_types_vhtcap *vht_capab;
+       struct mwifiex_ie_types_aid *aid;
        u8 *pos, qos_info;
        u16 config_len = 0;
        struct station_parameters *params = priv->sta_params;
@@ -1370,6 +1372,24 @@ mwifiex_cmd_tdls_oper(struct mwifiex_private *priv,
                        config_len += sizeof(struct mwifiex_ie_types_extcap) +
                                      params->ext_capab_len;
                }
+               if (params->vht_capa) {
+                       vht_capab = (struct mwifiex_ie_types_vhtcap *)(pos +
+                                                                   config_len);
+                       vht_capab->header.type =
+                                          cpu_to_le16(WLAN_EID_VHT_CAPABILITY);
+                       vht_capab->header.len =
+                                 cpu_to_le16(sizeof(struct ieee80211_vht_cap));
+                       memcpy(&vht_capab->vht_cap, params->vht_capa,
+                              sizeof(struct ieee80211_vht_cap));
+                       config_len += sizeof(struct mwifiex_ie_types_vhtcap);
+               }
+               if (params->aid) {
+                       aid = (struct mwifiex_ie_types_aid *)(pos + config_len);
+                       aid->header.type = cpu_to_le16(WLAN_EID_AID);
+                       aid->header.len = cpu_to_le16(sizeof(params->aid));
+                       aid->aid = cpu_to_le16(params->aid);
+                       config_len += sizeof(struct mwifiex_ie_types_aid);
+               }
 
                break;
        default:
index 243beab..770dcd7 100644 (file)
@@ -19,6 +19,7 @@
 #include "wmm.h"
 #include "11n.h"
 #include "11n_rxreorder.h"
+#include "11ac.h"
 
 #define TDLS_REQ_FIX_LEN      6
 #define TDLS_RESP_FIX_LEN     8
@@ -151,7 +152,156 @@ mwifiex_tdls_append_rates_ie(struct mwifiex_private *priv,
        return 0;
 }
 
-static void mwifiex_tdls_add_ext_capab(struct sk_buff *skb)
+static void mwifiex_tdls_add_aid(struct mwifiex_private *priv,
+                               struct sk_buff *skb)
+{
+       struct ieee_types_assoc_rsp *assoc_rsp;
+       u8 *pos;
+
+       assoc_rsp = (struct ieee_types_assoc_rsp *)&priv->assoc_rsp_buf;
+       pos = (void *)skb_put(skb, 4);
+       *pos++ = WLAN_EID_AID;
+       *pos++ = 2;
+       *pos++ = le16_to_cpu(assoc_rsp->a_id);
+
+       return;
+}
+
+static int mwifiex_tdls_add_vht_capab(struct mwifiex_private *priv,
+                                     struct sk_buff *skb)
+{
+       struct ieee80211_vht_cap vht_cap;
+       u8 *pos;
+
+       pos = (void *)skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
+       *pos++ = WLAN_EID_VHT_CAPABILITY;
+       *pos++ = sizeof(struct ieee80211_vht_cap);
+
+       memset(&vht_cap, 0, sizeof(struct ieee80211_vht_cap));
+
+       mwifiex_fill_vht_cap_tlv(priv, &vht_cap, priv->curr_bss_params.band);
+       memcpy(pos, &vht_cap, sizeof(struct ieee80211_ht_cap));
+
+       return 0;
+}
+
+static int mwifiex_tdls_add_vht_oper(struct mwifiex_private *priv,
+                                    u8 *mac, struct sk_buff *skb)
+{
+       struct mwifiex_bssdescriptor *bss_desc;
+       struct ieee80211_vht_operation *vht_oper;
+       struct ieee80211_vht_cap *vht_cap, *ap_vht_cap = NULL;
+       struct mwifiex_sta_node *sta_ptr;
+       struct mwifiex_adapter *adapter = priv->adapter;
+       u8 supp_chwd_set, peer_supp_chwd_set;
+       u8 *pos, ap_supp_chwd_set, chan_bw;
+       u16 mcs_map_user, mcs_map_resp, mcs_map_result;
+       u16 mcs_user, mcs_resp, nss;
+       u32 usr_vht_cap_info;
+
+       bss_desc = &priv->curr_bss_params.bss_descriptor;
+
+       sta_ptr = mwifiex_get_sta_entry(priv, mac);
+       if (unlikely(!sta_ptr)) {
+               dev_warn(adapter->dev, "TDLS peer station not found in list\n");
+               return -1;
+       }
+
+       if (!mwifiex_is_bss_in_11ac_mode(priv)) {
+               if (sta_ptr->tdls_cap.extcap.ext_capab[7] &
+                  WLAN_EXT_CAPA8_TDLS_WIDE_BW_ENABLED) {
+                       dev_dbg(adapter->dev,
+                               "TDLS peer doesn't support wider bandwitdh\n");
+                       return 0;
+               }
+       } else {
+               ap_vht_cap = bss_desc->bcn_vht_cap;
+       }
+
+       pos = (void *)skb_put(skb, sizeof(struct ieee80211_vht_operation) + 2);
+       *pos++ = WLAN_EID_VHT_OPERATION;
+       *pos++ = sizeof(struct ieee80211_vht_operation);
+       vht_oper = (struct ieee80211_vht_operation *)pos;
+
+       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;
+
+       /* find the minmum bandwith between AP/TDLS peers */
+       vht_cap = &sta_ptr->tdls_cap.vhtcap;
+       supp_chwd_set = GET_VHTCAP_CHWDSET(usr_vht_cap_info);
+       peer_supp_chwd_set =
+                        GET_VHTCAP_CHWDSET(le32_to_cpu(vht_cap->vht_cap_info));
+       supp_chwd_set = min_t(u8, supp_chwd_set, peer_supp_chwd_set);
+
+       /* We need check AP's bandwidth when TDLS_WIDER_BANDWIDTH is off */
+
+       if (ap_vht_cap && sta_ptr->tdls_cap.extcap.ext_capab[7] &
+           WLAN_EXT_CAPA8_TDLS_WIDE_BW_ENABLED) {
+               ap_supp_chwd_set =
+                     GET_VHTCAP_CHWDSET(le32_to_cpu(ap_vht_cap->vht_cap_info));
+               supp_chwd_set = min_t(u8, supp_chwd_set, ap_supp_chwd_set);
+       }
+
+       switch (supp_chwd_set) {
+       case IEEE80211_VHT_CHANWIDTH_80MHZ:
+               vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
+               break;
+       case IEEE80211_VHT_CHANWIDTH_160MHZ:
+               vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_160MHZ;
+               break;
+       case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
+               vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
+               break;
+       default:
+               vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
+               break;
+       }
+
+       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_t(u16, mcs_user, mcs_resp));
+       }
+
+       vht_oper->basic_mcs_set = cpu_to_le16(mcs_map_result);
+
+       switch (vht_oper->chan_width) {
+       case IEEE80211_VHT_CHANWIDTH_80MHZ:
+               chan_bw = IEEE80211_VHT_CHANWIDTH_80MHZ;
+               break;
+       case IEEE80211_VHT_CHANWIDTH_160MHZ:
+               chan_bw = IEEE80211_VHT_CHANWIDTH_160MHZ;
+               break;
+       case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
+               chan_bw = IEEE80211_VHT_CHANWIDTH_80MHZ;
+               break;
+       default:
+               chan_bw = IEEE80211_VHT_CHANWIDTH_USE_HT;
+               break;
+       }
+       vht_oper->center_freq_seg1_idx =
+                       mwifiex_get_center_freq_index(priv, BAND_AAC,
+                                                     bss_desc->channel,
+                                                     chan_bw);
+
+       return 0;
+}
+
+static void mwifiex_tdls_add_ext_capab(struct mwifiex_private *priv,
+                                      struct sk_buff *skb)
 {
        struct ieee_types_extcap *extcap;
 
@@ -160,6 +310,9 @@ static void mwifiex_tdls_add_ext_capab(struct sk_buff *skb)
        extcap->ieee_hdr.len = 8;
        memset(extcap->ext_capab, 0, 8);
        extcap->ext_capab[4] |= WLAN_EXT_CAPA5_TDLS_ENABLED;
+
+       if (priv->adapter->is_hw_11ac_capable)
+               extcap->ext_capab[7] |= WLAN_EXT_CAPA8_TDLS_WIDE_BW_ENABLED;
 }
 
 static void mwifiex_tdls_add_qos_capab(struct sk_buff *skb)
@@ -213,7 +366,16 @@ static int mwifiex_prep_tdls_encap_data(struct mwifiex_private *priv,
                        return ret;
                }
 
-               mwifiex_tdls_add_ext_capab(skb);
+               if (priv->adapter->is_hw_11ac_capable) {
+                       ret = mwifiex_tdls_add_vht_capab(priv, skb);
+                       if (ret) {
+                               dev_kfree_skb_any(skb);
+                               return ret;
+                       }
+                       mwifiex_tdls_add_aid(priv, skb);
+               }
+
+               mwifiex_tdls_add_ext_capab(priv, skb);
                mwifiex_tdls_add_qos_capab(skb);
                break;
 
@@ -241,7 +403,16 @@ static int mwifiex_prep_tdls_encap_data(struct mwifiex_private *priv,
                        return ret;
                }
 
-               mwifiex_tdls_add_ext_capab(skb);
+               if (priv->adapter->is_hw_11ac_capable) {
+                       ret = mwifiex_tdls_add_vht_capab(priv, skb);
+                       if (ret) {
+                               dev_kfree_skb_any(skb);
+                               return ret;
+                       }
+                       mwifiex_tdls_add_aid(priv, skb);
+               }
+
+               mwifiex_tdls_add_ext_capab(priv, skb);
                mwifiex_tdls_add_qos_capab(skb);
                break;
 
@@ -251,6 +422,13 @@ static int mwifiex_prep_tdls_encap_data(struct mwifiex_private *priv,
                skb_put(skb, sizeof(tf->u.setup_cfm));
                tf->u.setup_cfm.status_code = cpu_to_le16(status_code);
                tf->u.setup_cfm.dialog_token = dialog_token;
+               if (priv->adapter->is_hw_11ac_capable) {
+                       ret = mwifiex_tdls_add_vht_oper(priv, peer, skb);
+                       if (ret) {
+                               dev_kfree_skb_any(skb);
+                               return ret;
+                       }
+               }
                break;
 
        case WLAN_TDLS_TEARDOWN:
@@ -313,6 +491,11 @@ int mwifiex_send_tdls_data_frame(struct mwifiex_private *priv,
                  sizeof(struct ieee80211_tdls_lnkie) +
                  extra_ies_len;
 
+       if (priv->adapter->is_hw_11ac_capable)
+               skb_len += sizeof(struct ieee_types_vht_cap) +
+                          sizeof(struct ieee_types_vht_oper) +
+                          sizeof(struct ieee_types_aid);
+
        skb = dev_alloc_skb(skb_len);
        if (!skb) {
                dev_err(priv->adapter->dev,
@@ -435,7 +618,16 @@ mwifiex_construct_tdls_action_frame(struct mwifiex_private *priv, u8 *peer,
                        return ret;
                }
 
-               mwifiex_tdls_add_ext_capab(skb);
+               if (priv->adapter->is_hw_11ac_capable) {
+                       ret = mwifiex_tdls_add_vht_capab(priv, skb);
+                       if (ret) {
+                               dev_kfree_skb_any(skb);
+                               return ret;
+                       }
+                       mwifiex_tdls_add_aid(priv, skb);
+               }
+
+               mwifiex_tdls_add_ext_capab(priv, skb);
                mwifiex_tdls_add_qos_capab(skb);
                break;
        default:
@@ -472,6 +664,11 @@ int mwifiex_send_tdls_action_frame(struct mwifiex_private *priv,
                  3 + /* Qos Info */
                  ETH_ALEN; /* Address4 */
 
+       if (priv->adapter->is_hw_11ac_capable)
+               skb_len += sizeof(struct ieee_types_vht_cap) +
+                          sizeof(struct ieee_types_vht_oper) +
+                          sizeof(struct ieee_types_aid);
+
        skb = dev_alloc_skb(skb_len);
        if (!skb) {
                dev_err(priv->adapter->dev,
@@ -626,6 +823,22 @@ void mwifiex_process_tdls_action_frame(struct mwifiex_private *priv,
                case WLAN_EID_QOS_CAPA:
                        sta_ptr->tdls_cap.qos_info = pos[2];
                        break;
+               case WLAN_EID_VHT_OPERATION:
+                       if (priv->adapter->is_hw_11ac_capable)
+                               memcpy(&sta_ptr->tdls_cap.vhtoper, pos,
+                                      sizeof(struct ieee80211_vht_operation));
+                       break;
+               case WLAN_EID_VHT_CAPABILITY:
+                       if (priv->adapter->is_hw_11ac_capable) {
+                               memcpy((u8 *)&sta_ptr->tdls_cap.vhtcap, pos,
+                                      sizeof(struct ieee80211_vht_cap));
+                               sta_ptr->is_11ac_enabled = 1;
+                       }
+                       break;
+               case WLAN_EID_AID:
+                       if (priv->adapter->is_hw_11ac_capable)
+                               sta_ptr->tdls_cap.aid =
+                                             le16_to_cpu(*(__le16 *)(pos + 2));
                default:
                        break;
                }