diff options
Diffstat (limited to 'drivers/net/wireless/intel/iwlwifi/mvm/utils.c')
| -rw-r--r-- | drivers/net/wireless/intel/iwlwifi/mvm/utils.c | 164 |
1 files changed, 164 insertions, 0 deletions
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/utils.c b/drivers/net/wireless/intel/iwlwifi/mvm/utils.c index fa995e235d9b..1a6c1f8706e1 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/utils.c +++ b/drivers/net/wireless/intel/iwlwifi/mvm/utils.c @@ -1243,3 +1243,167 @@ bool iwl_mvm_vif_is_active(struct iwl_mvm_vif *mvmvif) return false; } + +static u32 iwl_legacy_rate_to_fw_idx(u32 rate_n_flags) +{ + int rate = rate_n_flags & RATE_LEGACY_RATE_MSK_V1; + int idx; + bool ofdm = !(rate_n_flags & RATE_MCS_CCK_MSK_V1); + int offset = ofdm ? IWL_FIRST_OFDM_RATE : 0; + int last = ofdm ? IWL_RATE_COUNT_LEGACY : IWL_FIRST_OFDM_RATE; + + for (idx = offset; idx < last; idx++) + if (iwl_fw_rate_idx_to_plcp(idx) == rate) + return idx - offset; + return IWL_RATE_INVALID; +} + +u32 iwl_mvm_v3_rate_from_fw(__le32 rate, u8 rate_ver) +{ + u32 rate_v3 = 0, rate_v1; + u32 dup = 0; + + if (rate_ver > 1) + return iwl_v3_rate_from_v2_v3(rate, rate_ver >= 3); + + rate_v1 = le32_to_cpu(rate); + if (rate_v1 == 0) + return rate_v1; + /* convert rate */ + if (rate_v1 & RATE_MCS_HT_MSK_V1) { + u32 nss; + + rate_v3 |= RATE_MCS_MOD_TYPE_HT; + rate_v3 |= + rate_v1 & RATE_HT_MCS_RATE_CODE_MSK_V1; + nss = u32_get_bits(rate_v1, RATE_HT_MCS_MIMO2_MSK); + rate_v3 |= u32_encode_bits(nss, RATE_MCS_NSS_MSK); + } else if (rate_v1 & RATE_MCS_VHT_MSK_V1 || + rate_v1 & RATE_MCS_HE_MSK_V1) { + u32 nss = u32_get_bits(rate_v1, RATE_VHT_MCS_NSS_MSK); + + rate_v3 |= rate_v1 & RATE_VHT_MCS_RATE_CODE_MSK; + + rate_v3 |= u32_encode_bits(nss, RATE_MCS_NSS_MSK); + + if (rate_v1 & RATE_MCS_HE_MSK_V1) { + u32 he_type_bits = rate_v1 & RATE_MCS_HE_TYPE_MSK_V1; + u32 he_type = he_type_bits >> RATE_MCS_HE_TYPE_POS_V1; + u32 he_106t = (rate_v1 & RATE_MCS_HE_106T_MSK_V1) >> + RATE_MCS_HE_106T_POS_V1; + u32 he_gi_ltf = (rate_v1 & RATE_MCS_HE_GI_LTF_MSK_V1) >> + RATE_MCS_HE_GI_LTF_POS; + + if ((he_type_bits == RATE_MCS_HE_TYPE_SU || + he_type_bits == RATE_MCS_HE_TYPE_EXT_SU) && + he_gi_ltf == RATE_MCS_HE_SU_4_LTF) + /* the new rate have an additional bit to + * represent the value 4 rather then using SGI + * bit for this purpose - as it was done in the + * old rate + */ + he_gi_ltf += (rate_v1 & RATE_MCS_SGI_MSK_V1) >> + RATE_MCS_SGI_POS_V1; + + rate_v3 |= he_gi_ltf << RATE_MCS_HE_GI_LTF_POS; + rate_v3 |= he_type << RATE_MCS_HE_TYPE_POS; + rate_v3 |= he_106t << RATE_MCS_HE_106T_POS; + rate_v3 |= rate_v1 & RATE_HE_DUAL_CARRIER_MODE_MSK; + rate_v3 |= RATE_MCS_MOD_TYPE_HE; + } else { + rate_v3 |= RATE_MCS_MOD_TYPE_VHT; + } + /* if legacy format */ + } else { + u32 legacy_rate = iwl_legacy_rate_to_fw_idx(rate_v1); + + if (WARN_ON_ONCE(legacy_rate == IWL_RATE_INVALID)) + legacy_rate = (rate_v1 & RATE_MCS_CCK_MSK_V1) ? + IWL_FIRST_CCK_RATE : IWL_FIRST_OFDM_RATE; + + rate_v3 |= legacy_rate; + if (!(rate_v1 & RATE_MCS_CCK_MSK_V1)) + rate_v3 |= RATE_MCS_MOD_TYPE_LEGACY_OFDM; + } + + /* convert flags */ + if (rate_v1 & RATE_MCS_LDPC_MSK_V1) + rate_v3 |= RATE_MCS_LDPC_MSK; + rate_v3 |= (rate_v1 & RATE_MCS_CHAN_WIDTH_MSK_V1) | + (rate_v1 & RATE_MCS_ANT_AB_MSK) | + (rate_v1 & RATE_MCS_STBC_MSK) | + (rate_v1 & RATE_MCS_BF_MSK); + + dup = (rate_v1 & RATE_MCS_DUP_MSK_V1) >> RATE_MCS_DUP_POS_V1; + if (dup) { + rate_v3 |= RATE_MCS_DUP_MSK; + rate_v3 |= dup << RATE_MCS_CHAN_WIDTH_POS; + } + + if ((!(rate_v1 & RATE_MCS_HE_MSK_V1)) && + (rate_v1 & RATE_MCS_SGI_MSK_V1)) + rate_v3 |= RATE_MCS_SGI_MSK; + + return rate_v3; +} + +__le32 iwl_mvm_v3_rate_to_fw(u32 rate, u8 rate_ver) +{ + u32 result = 0; + int rate_idx; + + if (rate_ver > 1) + return iwl_v3_rate_to_v2_v3(rate, rate_ver > 2); + + switch (rate & RATE_MCS_MOD_TYPE_MSK) { + case RATE_MCS_MOD_TYPE_CCK: + result = RATE_MCS_CCK_MSK_V1; + fallthrough; + case RATE_MCS_MOD_TYPE_LEGACY_OFDM: + rate_idx = u32_get_bits(rate, RATE_LEGACY_RATE_MSK); + if (!(result & RATE_MCS_CCK_MSK_V1)) + rate_idx += IWL_FIRST_OFDM_RATE; + result |= u32_encode_bits(iwl_fw_rate_idx_to_plcp(rate_idx), + RATE_LEGACY_RATE_MSK_V1); + break; + case RATE_MCS_MOD_TYPE_HT: + result = RATE_MCS_HT_MSK_V1; + result |= u32_encode_bits(u32_get_bits(rate, + RATE_HT_MCS_CODE_MSK), + RATE_HT_MCS_RATE_CODE_MSK_V1); + result |= u32_encode_bits(u32_get_bits(rate, + RATE_MCS_NSS_MSK), + RATE_HT_MCS_MIMO2_MSK); + break; + case RATE_MCS_MOD_TYPE_VHT: + result = RATE_MCS_VHT_MSK_V1; + result |= u32_encode_bits(u32_get_bits(rate, + RATE_VHT_MCS_NSS_MSK), + RATE_MCS_CODE_MSK); + result |= u32_encode_bits(u32_get_bits(rate, RATE_MCS_NSS_MSK), + RATE_VHT_MCS_NSS_MSK); + break; + case RATE_MCS_MOD_TYPE_HE: /* not generated */ + default: + WARN_ONCE(1, "bad modulation type %d\n", + u32_get_bits(rate, RATE_MCS_MOD_TYPE_MSK)); + return 0; + } + + if (rate & RATE_MCS_LDPC_MSK) + result |= RATE_MCS_LDPC_MSK_V1; + WARN_ON_ONCE(u32_get_bits(rate, RATE_MCS_CHAN_WIDTH_MSK) > + RATE_MCS_CHAN_WIDTH_160_VAL); + result |= (rate & RATE_MCS_CHAN_WIDTH_MSK_V1) | + (rate & RATE_MCS_ANT_AB_MSK) | + (rate & RATE_MCS_STBC_MSK) | + (rate & RATE_MCS_BF_MSK); + + /* not handling DUP since we don't use it */ + WARN_ON_ONCE(rate & RATE_MCS_DUP_MSK); + + if (rate & RATE_MCS_SGI_MSK) + result |= RATE_MCS_SGI_MSK_V1; + + return cpu_to_le32(result); +} |