diff options
Diffstat (limited to 'drivers/net/wireless/iwlwifi/mvm/mac-ctxt.c')
-rw-r--r-- | drivers/net/wireless/iwlwifi/mvm/mac-ctxt.c | 51 |
1 files changed, 42 insertions, 9 deletions
diff --git a/drivers/net/wireless/iwlwifi/mvm/mac-ctxt.c b/drivers/net/wireless/iwlwifi/mvm/mac-ctxt.c index f41f9b079831..fb93961da750 100644 --- a/drivers/net/wireless/iwlwifi/mvm/mac-ctxt.c +++ b/drivers/net/wireless/iwlwifi/mvm/mac-ctxt.c @@ -488,6 +488,40 @@ static void iwl_mvm_ack_rates(struct iwl_mvm *mvm, *ofdm_rates = ofdm; } +static void iwl_mvm_mac_ctxt_set_ht_flags(struct iwl_mvm *mvm, + struct ieee80211_vif *vif, + struct iwl_mac_ctx_cmd *cmd) +{ + /* for both sta and ap, ht_operation_mode hold the protection_mode */ + u8 protection_mode = vif->bss_conf.ht_operation_mode & + IEEE80211_HT_OP_MODE_PROTECTION; + /* The fw does not distinguish between ht and fat */ + u32 ht_flag = MAC_PROT_FLG_HT_PROT | MAC_PROT_FLG_FAT_PROT; + + IWL_DEBUG_RATE(mvm, "protection mode set to %d\n", protection_mode); + /* + * See section 9.23.3.1 of IEEE 80211-2012. + * Nongreenfield HT STAs Present is not supported. + */ + switch (protection_mode) { + case IEEE80211_HT_OP_MODE_PROTECTION_NONE: + break; + case IEEE80211_HT_OP_MODE_PROTECTION_NONMEMBER: + case IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED: + cmd->protection_flags |= cpu_to_le32(ht_flag); + break; + case IEEE80211_HT_OP_MODE_PROTECTION_20MHZ: + /* Protect when channel wider than 20MHz */ + if (vif->bss_conf.chandef.width > NL80211_CHAN_WIDTH_20) + cmd->protection_flags |= cpu_to_le32(ht_flag); + break; + default: + IWL_ERR(mvm, "Illegal protection mode %d\n", + protection_mode); + break; + } +} + static void iwl_mvm_mac_ctxt_cmd_common(struct iwl_mvm *mvm, struct ieee80211_vif *vif, struct iwl_mac_ctx_cmd *cmd, @@ -495,6 +529,8 @@ static void iwl_mvm_mac_ctxt_cmd_common(struct iwl_mvm *mvm, { struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); struct ieee80211_chanctx_conf *chanctx; + bool ht_enabled = !!(vif->bss_conf.ht_operation_mode & + IEEE80211_HT_OP_MODE_PROTECTION); u8 cck_ack_rates, ofdm_ack_rates; int i; @@ -573,16 +609,13 @@ static void iwl_mvm_mac_ctxt_cmd_common(struct iwl_mvm *mvm, cmd->protection_flags |= cpu_to_le32(MAC_PROT_FLG_SELF_CTS_EN); } - - /* - * I think that we should enable these 2 flags regardless the HT PROT - * fields in the HT IE, but I am not sure. Someone knows whom to ask?... - */ - if (vif->bss_conf.chandef.width != NL80211_CHAN_WIDTH_20_NOHT) { + IWL_DEBUG_RATE(mvm, "use_cts_prot %d, ht_operation_mode %d\n", + vif->bss_conf.use_cts_prot, + vif->bss_conf.ht_operation_mode); + if (vif->bss_conf.chandef.width != NL80211_CHAN_WIDTH_20_NOHT) cmd->qos_flags |= cpu_to_le32(MAC_QOS_FLG_TGN); - cmd->protection_flags |= cpu_to_le32(MAC_PROT_FLG_HT_PROT | - MAC_PROT_FLG_FAT_PROT); - } + if (ht_enabled) + iwl_mvm_mac_ctxt_set_ht_flags(mvm, vif, cmd); cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP); } |