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// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
/*
* Copyright (C) 2021-2022, 2025 Intel Corporation
*/
#include <net/mac80211.h>
#include "fw/api/rs.h"
#include "iwl-drv.h"
#include "iwl-config.h"
#define IWL_DECLARE_RATE_INFO(r) \
[IWL_RATE_##r##M_INDEX] = IWL_RATE_##r##M_PLCP
/*
* Translate from fw_rate_index (IWL_RATE_XXM_INDEX) to PLCP
* */
static const u8 fw_rate_idx_to_plcp[IWL_RATE_COUNT] = {
IWL_DECLARE_RATE_INFO(1),
IWL_DECLARE_RATE_INFO(2),
IWL_DECLARE_RATE_INFO(5),
IWL_DECLARE_RATE_INFO(11),
IWL_DECLARE_RATE_INFO(6),
IWL_DECLARE_RATE_INFO(9),
IWL_DECLARE_RATE_INFO(12),
IWL_DECLARE_RATE_INFO(18),
IWL_DECLARE_RATE_INFO(24),
IWL_DECLARE_RATE_INFO(36),
IWL_DECLARE_RATE_INFO(48),
IWL_DECLARE_RATE_INFO(54),
};
/* mbps, mcs */
static const struct iwl_rate_mcs_info rate_mcs[IWL_RATE_COUNT] = {
{ "1", "BPSK DSSS"},
{ "2", "QPSK DSSS"},
{"5.5", "BPSK CCK"},
{ "11", "QPSK CCK"},
{ "6", "BPSK 1/2"},
{ "9", "BPSK 1/2"},
{ "12", "QPSK 1/2"},
{ "18", "QPSK 3/4"},
{ "24", "16QAM 1/2"},
{ "36", "16QAM 3/4"},
{ "48", "64QAM 2/3"},
{ "54", "64QAM 3/4"},
{ "60", "64QAM 5/6"},
};
static const char * const ant_name[] = {
[ANT_NONE] = "None",
[ANT_A] = "A",
[ANT_B] = "B",
[ANT_AB] = "AB",
};
static const char * const pretty_bw[] = {
"20Mhz",
"40Mhz",
"80Mhz",
"160 Mhz",
"320Mhz",
};
u8 iwl_fw_rate_idx_to_plcp(int idx)
{
return fw_rate_idx_to_plcp[idx];
}
IWL_EXPORT_SYMBOL(iwl_fw_rate_idx_to_plcp);
const struct iwl_rate_mcs_info *iwl_rate_mcs(int idx)
{
return &rate_mcs[idx];
}
IWL_EXPORT_SYMBOL(iwl_rate_mcs);
const char *iwl_rs_pretty_ant(u8 ant)
{
if (ant >= ARRAY_SIZE(ant_name))
return "UNKNOWN";
return ant_name[ant];
}
IWL_EXPORT_SYMBOL(iwl_rs_pretty_ant);
const char *iwl_rs_pretty_bw(int bw)
{
if (bw >= ARRAY_SIZE(pretty_bw))
return "unknown bw";
return pretty_bw[bw];
}
IWL_EXPORT_SYMBOL(iwl_rs_pretty_bw);
int rs_pretty_print_rate(char *buf, int bufsz, const u32 rate)
{
char *type;
u8 mcs = 0, nss = 0;
u8 ant = (rate & RATE_MCS_ANT_AB_MSK) >> RATE_MCS_ANT_POS;
u32 bw = (rate & RATE_MCS_CHAN_WIDTH_MSK) >>
RATE_MCS_CHAN_WIDTH_POS;
u32 format = rate & RATE_MCS_MOD_TYPE_MSK;
int index = 0;
bool sgi;
switch (format) {
case RATE_MCS_MOD_TYPE_LEGACY_OFDM:
index = IWL_FIRST_OFDM_RATE;
fallthrough;
case RATE_MCS_MOD_TYPE_CCK:
index += rate & RATE_LEGACY_RATE_MSK;
return scnprintf(buf, bufsz, "Legacy | ANT: %s Rate: %s Mbps",
iwl_rs_pretty_ant(ant),
iwl_rate_mcs(index)->mbps);
case RATE_MCS_MOD_TYPE_VHT:
type = "VHT";
break;
case RATE_MCS_MOD_TYPE_HT:
type = "HT";
break;
case RATE_MCS_MOD_TYPE_HE:
type = "HE";
break;
case RATE_MCS_MOD_TYPE_EHT:
type = "EHT";
break;
default:
type = "Unknown"; /* shouldn't happen */
}
mcs = format == RATE_MCS_MOD_TYPE_HT ?
RATE_HT_MCS_INDEX(rate) :
rate & RATE_MCS_CODE_MSK;
nss = u32_get_bits(rate, RATE_MCS_NSS_MSK);
sgi = format == RATE_MCS_MOD_TYPE_HE ?
iwl_he_is_sgi(rate) :
rate & RATE_MCS_SGI_MSK;
return scnprintf(buf, bufsz,
"0x%x: %s | ANT: %s BW: %s MCS: %d NSS: %d %s%s%s%s%s",
rate, type, iwl_rs_pretty_ant(ant), iwl_rs_pretty_bw(bw), mcs, nss,
(sgi) ? "SGI " : "NGI ",
(rate & RATE_MCS_STBC_MSK) ? "STBC " : "",
(rate & RATE_MCS_LDPC_MSK) ? "LDPC " : "",
(rate & RATE_HE_DUAL_CARRIER_MODE_MSK) ? "DCM " : "",
(rate & RATE_MCS_BF_MSK) ? "BF " : "");
}
IWL_EXPORT_SYMBOL(rs_pretty_print_rate);
bool iwl_he_is_sgi(u32 rate_n_flags)
{
u32 type = rate_n_flags & RATE_MCS_HE_TYPE_MSK;
u32 ltf_gi = rate_n_flags & RATE_MCS_HE_GI_LTF_MSK;
if (type == RATE_MCS_HE_TYPE_SU ||
type == RATE_MCS_HE_TYPE_EXT_SU)
return ltf_gi == RATE_MCS_HE_SU_4_LTF_08_GI;
return false;
}
IWL_EXPORT_SYMBOL(iwl_he_is_sgi);
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