The mcs index of HT mode is 0 to 31, please refer http://mcsindex.com/. Its spatial stream(Nss) number is from 1 to 4, mcs index is 0~7 for Nss=1, 8~15 for Nss=2, 16~23 for Nss=3 and 24~31 is for Nss=4. The mcs is reported from firmware in wmi_tlv_peer_stats_info of event WMI_TLV_PEER_STATS_INFO_EVENTID, its range is from 0~15 for QCA6174 SDIO and PCIe. It is for both Nss=1 and Nss=2, and it has 2 rate table supported_ht_mcs_rate_nss1 and supported_ht_mcs_rate_nss2 in ath10k, they are for Nss=1 and Nss=2, each table has 8 rates. It need to find the matched row number with the mcs index, for example, mcs index is 2, it is <=7, so it is Nss=1, and match row 2 in table of Nss=1. If mcs index is 12, it is >= 8 and <= 15, so it is Nss=2, it match row 4(12-8) in table of Nss=2. If mcs index is >=16, it is for Nss=3/4, it need to add rate table, so it is not support in current ath10k. This patch is to find the row number in rate table of Nss=1 or Nss=2 with the mcs index reported from firmware. This patch only effect the chips which supports_peer_stats_info of its hw_params is true, it is true only for QCA6174 currently. Tested-on: QCA6174 hw3.2 SDIO WLAN.RMH.4.4.1-00048 Tested-on: QCA6174 hw3.2 PCI WLAN.RM.4.4.1-00110-QCARMSWP-1 Signed-off-by: Wen Gong <wgong@xxxxxxxxxxxxxx> --- drivers/net/wireless/ath/ath10k/mac.c | 24 ++++++++++++++++++++---- 1 file changed, 20 insertions(+), 4 deletions(-) diff --git a/drivers/net/wireless/ath/ath10k/mac.c b/drivers/net/wireless/ath/ath10k/mac.c index 3e3896214e8b..daa9e43d16b0 100644 --- a/drivers/net/wireless/ath/ath10k/mac.c +++ b/drivers/net/wireless/ath/ath10k/mac.c @@ -8368,19 +8368,32 @@ static void ath10k_mac_get_rate_flags_ht(struct ath10k *ar, u32 rate, u8 nss, u8 u8 *flags, u8 *bw) { struct ath10k_index_ht_data_rate_type *mcs_rate; + u8 index; + size_t len_nss1 = ARRAY_SIZE(supported_ht_mcs_rate_nss1); + size_t len_nss2 = ARRAY_SIZE(supported_ht_mcs_rate_nss2); + + if (mcs >= (len_nss1 + len_nss2)) { + ath10k_warn(ar, "not supported mcs %d in current rate table", mcs); + return; + } mcs_rate = (struct ath10k_index_ht_data_rate_type *) ((nss == 1) ? &supported_ht_mcs_rate_nss1 : &supported_ht_mcs_rate_nss2); - if (rate == mcs_rate[mcs].supported_rate[0]) { + if (mcs >= len_nss1) + index = mcs - len_nss1; + else + index = mcs; + + if (rate == mcs_rate[index].supported_rate[0]) { *bw = RATE_INFO_BW_20; - } else if (rate == mcs_rate[mcs].supported_rate[1]) { + } else if (rate == mcs_rate[index].supported_rate[1]) { *bw |= RATE_INFO_BW_40; - } else if (rate == mcs_rate[mcs].supported_rate[2]) { + } else if (rate == mcs_rate[index].supported_rate[2]) { *bw |= RATE_INFO_BW_20; *flags |= RATE_INFO_FLAGS_SHORT_GI; - } else if (rate == mcs_rate[mcs].supported_rate[3]) { + } else if (rate == mcs_rate[index].supported_rate[3]) { *bw |= RATE_INFO_BW_40; *flags |= RATE_INFO_FLAGS_SHORT_GI; } else { @@ -8441,6 +8454,9 @@ static void ath10k_mac_parse_bitrate(struct ath10k *ar, u32 rate_code, u8 mcs = WMI_TLV_GET_HW_RC_RATE_V1(rate_code); u8 flags = 0, bw = 0; + ath10k_dbg(ar, ATH10K_DBG_MAC, "mac parse rate code 0x%x bitrate %d kbps\n", + rate_code, bitrate_kbps); + if (preamble == WMI_RATE_PREAMBLE_HT) mode = ATH10K_PHY_MODE_HT; else if (preamble == WMI_RATE_PREAMBLE_VHT) -- 2.23.0
