1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause 2 /* 3 * Copyright (C) 2021-2022, 2025 Intel Corporation 4 */ 5 6 #include <net/mac80211.h> 7 #include "fw/api/rs.h" 8 #include "iwl-drv.h" 9 #include "iwl-config.h" 10 11 #define IWL_DECLARE_RATE_INFO(r) \ 12 [IWL_RATE_##r##M_INDEX] = IWL_RATE_##r##M_PLCP 13 14 /* 15 * Translate from fw_rate_index (IWL_RATE_XXM_INDEX) to PLCP 16 * */ 17 static const u8 fw_rate_idx_to_plcp[IWL_RATE_COUNT] = { 18 IWL_DECLARE_RATE_INFO(1), 19 IWL_DECLARE_RATE_INFO(2), 20 IWL_DECLARE_RATE_INFO(5), 21 IWL_DECLARE_RATE_INFO(11), 22 IWL_DECLARE_RATE_INFO(6), 23 IWL_DECLARE_RATE_INFO(9), 24 IWL_DECLARE_RATE_INFO(12), 25 IWL_DECLARE_RATE_INFO(18), 26 IWL_DECLARE_RATE_INFO(24), 27 IWL_DECLARE_RATE_INFO(36), 28 IWL_DECLARE_RATE_INFO(48), 29 IWL_DECLARE_RATE_INFO(54), 30 }; 31 32 /* mbps, mcs */ 33 static const struct iwl_rate_mcs_info rate_mcs[IWL_RATE_COUNT] = { 34 { "1", "BPSK DSSS"}, 35 { "2", "QPSK DSSS"}, 36 {"5.5", "BPSK CCK"}, 37 { "11", "QPSK CCK"}, 38 { "6", "BPSK 1/2"}, 39 { "9", "BPSK 1/2"}, 40 { "12", "QPSK 1/2"}, 41 { "18", "QPSK 3/4"}, 42 { "24", "16QAM 1/2"}, 43 { "36", "16QAM 3/4"}, 44 { "48", "64QAM 2/3"}, 45 { "54", "64QAM 3/4"}, 46 { "60", "64QAM 5/6"}, 47 }; 48 49 static const char * const ant_name[] = { 50 [ANT_NONE] = "None", 51 [ANT_A] = "A", 52 [ANT_B] = "B", 53 [ANT_AB] = "AB", 54 }; 55 56 static const char * const pretty_bw[] = { 57 "20Mhz", 58 "40Mhz", 59 "80Mhz", 60 "160 Mhz", 61 "320Mhz", 62 }; 63 64 u8 iwl_fw_rate_idx_to_plcp(int idx) 65 { 66 return fw_rate_idx_to_plcp[idx]; 67 } 68 IWL_EXPORT_SYMBOL(iwl_fw_rate_idx_to_plcp); 69 70 const struct iwl_rate_mcs_info *iwl_rate_mcs(int idx) 71 { 72 return &rate_mcs[idx]; 73 } 74 IWL_EXPORT_SYMBOL(iwl_rate_mcs); 75 76 const char *iwl_rs_pretty_ant(u8 ant) 77 { 78 if (ant >= ARRAY_SIZE(ant_name)) 79 return "UNKNOWN"; 80 81 return ant_name[ant]; 82 } 83 IWL_EXPORT_SYMBOL(iwl_rs_pretty_ant); 84 85 const char *iwl_rs_pretty_bw(int bw) 86 { 87 if (bw >= ARRAY_SIZE(pretty_bw)) 88 return "unknown bw"; 89 90 return pretty_bw[bw]; 91 } 92 IWL_EXPORT_SYMBOL(iwl_rs_pretty_bw); 93 94 int rs_pretty_print_rate(char *buf, int bufsz, const u32 rate) 95 { 96 char *type; 97 u8 mcs = 0, nss = 0; 98 u8 ant = (rate & RATE_MCS_ANT_AB_MSK) >> RATE_MCS_ANT_POS; 99 u32 bw = (rate & RATE_MCS_CHAN_WIDTH_MSK) >> 100 RATE_MCS_CHAN_WIDTH_POS; 101 u32 format = rate & RATE_MCS_MOD_TYPE_MSK; 102 int index = 0; 103 bool sgi; 104 105 switch (format) { 106 case RATE_MCS_MOD_TYPE_LEGACY_OFDM: 107 index = IWL_FIRST_OFDM_RATE; 108 fallthrough; 109 case RATE_MCS_MOD_TYPE_CCK: 110 index += rate & RATE_LEGACY_RATE_MSK; 111 112 return scnprintf(buf, bufsz, "Legacy | ANT: %s Rate: %s Mbps", 113 iwl_rs_pretty_ant(ant), 114 iwl_rate_mcs(index)->mbps); 115 case RATE_MCS_MOD_TYPE_VHT: 116 type = "VHT"; 117 break; 118 case RATE_MCS_MOD_TYPE_HT: 119 type = "HT"; 120 break; 121 case RATE_MCS_MOD_TYPE_HE: 122 type = "HE"; 123 break; 124 case RATE_MCS_MOD_TYPE_EHT: 125 type = "EHT"; 126 break; 127 default: 128 type = "Unknown"; /* shouldn't happen */ 129 } 130 131 mcs = format == RATE_MCS_MOD_TYPE_HT ? 132 RATE_HT_MCS_INDEX(rate) : 133 rate & RATE_MCS_CODE_MSK; 134 nss = u32_get_bits(rate, RATE_MCS_NSS_MSK); 135 sgi = format == RATE_MCS_MOD_TYPE_HE ? 136 iwl_he_is_sgi(rate) : 137 rate & RATE_MCS_SGI_MSK; 138 139 return scnprintf(buf, bufsz, 140 "0x%x: %s | ANT: %s BW: %s MCS: %d NSS: %d %s%s%s%s%s", 141 rate, type, iwl_rs_pretty_ant(ant), iwl_rs_pretty_bw(bw), mcs, nss, 142 (sgi) ? "SGI " : "NGI ", 143 (rate & RATE_MCS_STBC_MSK) ? "STBC " : "", 144 (rate & RATE_MCS_LDPC_MSK) ? "LDPC " : "", 145 (rate & RATE_HE_DUAL_CARRIER_MODE_MSK) ? "DCM " : "", 146 (rate & RATE_MCS_BF_MSK) ? "BF " : ""); 147 } 148 IWL_EXPORT_SYMBOL(rs_pretty_print_rate); 149 150 bool iwl_he_is_sgi(u32 rate_n_flags) 151 { 152 u32 type = rate_n_flags & RATE_MCS_HE_TYPE_MSK; 153 u32 ltf_gi = rate_n_flags & RATE_MCS_HE_GI_LTF_MSK; 154 155 if (type == RATE_MCS_HE_TYPE_SU || 156 type == RATE_MCS_HE_TYPE_EXT_SU) 157 return ltf_gi == RATE_MCS_HE_SU_4_LTF_08_GI; 158 return false; 159 } 160 IWL_EXPORT_SYMBOL(iwl_he_is_sgi); 161 162