From c5d679a55dce1c025b12bcea5063d882565622b8 Mon Sep 17 00:00:00 2001 From: Eyal Shapira Date: Thu, 15 Jan 2015 20:22:34 +0200 Subject: [PATCH] iwlwifi: mvm: use a new API for enabling STBC The new API tells the FW that it's allowed to use STBC but the FW will decide on its own whether to use STBC or SISO (and in the future Beamformer). Keep support for the old API which sets STBC explicitly in the rates in the LQ table while we still support old FW revisions. Signed-off-by: Eyal Shapira Reviewed-by: Johannes Berg Signed-off-by: Emmanuel Grumbach --- drivers/net/wireless/iwlwifi/iwl-fw-file.h | 2 ++ drivers/net/wireless/iwlwifi/mvm/fw-api-rs.h | 15 +++++++++++++-- drivers/net/wireless/iwlwifi/mvm/rs.c | 14 +++++++++++++- 3 files changed, 28 insertions(+), 3 deletions(-) diff --git a/drivers/net/wireless/iwlwifi/iwl-fw-file.h b/drivers/net/wireless/iwlwifi/iwl-fw-file.h index b998aaf5efd1..e4f589898eda 100644 --- a/drivers/net/wireless/iwlwifi/iwl-fw-file.h +++ b/drivers/net/wireless/iwlwifi/iwl-fw-file.h @@ -249,6 +249,7 @@ enum iwl_ucode_tlv_flag { * through the dedicated host command. * @IWL_UCODE_TLV_API_SINGLE_SCAN_EBS: EBS is supported for single scans too. * @IWL_UCODE_TLV_API_ASYNC_DTM: Async temperature notifications are supported. + * @IWL_UCODE_TLV_API_LQ_SS_PARAMS: Configure STBC/BFER via LQ CMD ss_params */ enum iwl_ucode_tlv_api { IWL_UCODE_TLV_API_BT_COEX_SPLIT = BIT(3), @@ -261,6 +262,7 @@ enum iwl_ucode_tlv_api { IWL_UCODE_TLV_API_SCD_CFG = BIT(15), IWL_UCODE_TLV_API_SINGLE_SCAN_EBS = BIT(16), IWL_UCODE_TLV_API_ASYNC_DTM = BIT(17), + IWL_UCODE_TLV_API_LQ_SS_PARAMS = BIT(18), }; /** diff --git a/drivers/net/wireless/iwlwifi/mvm/fw-api-rs.h b/drivers/net/wireless/iwlwifi/mvm/fw-api-rs.h index 8bb5b94bf963..6a2a6b0ab91b 100644 --- a/drivers/net/wireless/iwlwifi/mvm/fw-api-rs.h +++ b/drivers/net/wireless/iwlwifi/mvm/fw-api-rs.h @@ -308,6 +308,17 @@ enum { #define LQ_FLAG_DYNAMIC_BW_POS 6 #define LQ_FLAG_DYNAMIC_BW_MSK (1 << LQ_FLAG_DYNAMIC_BW_POS) +/* Single Stream Parameters + * SS_STBC/BFER_ALLOWED - Controls whether STBC or Beamformer (BFER) is allowed + * ucode will make a smart decision between SISO/STBC/BFER + * SS_PARAMS_VALID - if not set ignore the ss_params field. + */ +enum { + RS_SS_STBC_ALLOWED = BIT(0), + RS_SS_BFER_ALLOWED = BIT(1), + RS_SS_PARAMS_VALID = BIT(31), +}; + /** * struct iwl_lq_cmd - link quality command * @sta_id: station to update @@ -330,7 +341,7 @@ enum { * 2 - 0x3f: maximal number of frames (up to 3f == 63) * @rs_table: array of rates for each TX try, each is rate_n_flags, * meaning it is a combination of RATE_MCS_* and IWL_RATE_*_PLCP - * @bf_params: beam forming params, currently not used + * @ss_params: single stream features. declare whether STBC or BFER are allowed. */ struct iwl_lq_cmd { u8 sta_id; @@ -348,6 +359,6 @@ struct iwl_lq_cmd { u8 agg_frame_cnt_limit; __le32 reserved2; __le32 rs_table[LQ_MAX_RETRY_NUM]; - __le32 bf_params; + __le32 ss_params; }; /* LINK_QUALITY_CMD_API_S_VER_1 */ #endif /* __fw_api_rs_h__ */ diff --git a/drivers/net/wireless/iwlwifi/mvm/rs.c b/drivers/net/wireless/iwlwifi/mvm/rs.c index 554b3a5e442c..f30eff20cb6b 100644 --- a/drivers/net/wireless/iwlwifi/mvm/rs.c +++ b/drivers/net/wireless/iwlwifi/mvm/rs.c @@ -2868,11 +2868,23 @@ static void rs_build_rates_table(struct iwl_mvm *mvm, u8 valid_tx_ant = 0; struct iwl_lq_cmd *lq_cmd = &lq_sta->lq; bool toggle_ant = false; + bool stbc_allowed = false; memcpy(&rate, initial_rate, sizeof(rate)); valid_tx_ant = iwl_mvm_get_valid_tx_ant(mvm); - rate.stbc = rs_stbc_allow(mvm, sta, lq_sta); + + stbc_allowed = rs_stbc_allow(mvm, sta, lq_sta); + if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LQ_SS_PARAMS) { + u32 ss_params = RS_SS_PARAMS_VALID; + + if (stbc_allowed) + ss_params |= RS_SS_STBC_ALLOWED; + lq_cmd->ss_params = cpu_to_le32(ss_params); + } else { + /* TODO: remove old API when min FW API hits 14 */ + rate.stbc = stbc_allowed; + } if (is_siso(&rate)) { num_rates = IWL_MVM_RS_INITIAL_SISO_NUM_RATES; -- 2.39.5