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
iwl_fw_rate_idx_to_plcp(int idx)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
iwl_rate_mcs(int idx)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
iwl_rs_pretty_ant(u8 ant)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
iwl_rs_pretty_bw(int bw)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
rs_pretty_print_rate(char * buf,int bufsz,const u32 rate)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
iwl_he_is_sgi(u32 rate_n_flags)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