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// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
/*
* Copyright (C) 2021 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);
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_new_rate_from_v1(u32 rate_v1)
{
u32 rate_v2 = 0;
u32 dup = 0;
if (rate_v1 == 0)
return rate_v1;
/* convert rate */
if (rate_v1 & RATE_MCS_HT_MSK_V1) {
u32 nss = 0;
rate_v2 |= RATE_MCS_HT_MSK;
rate_v2 |=
rate_v1 & RATE_HT_MCS_RATE_CODE_MSK_V1;
nss = (rate_v1 & RATE_HT_MCS_MIMO2_MSK) >>
RATE_HT_MCS_NSS_POS_V1;
rate_v2 |= nss << RATE_MCS_NSS_POS;
} else if (rate_v1 & RATE_MCS_VHT_MSK_V1 ||
rate_v1 & RATE_MCS_HE_MSK_V1) {
rate_v2 |= rate_v1 & RATE_VHT_MCS_RATE_CODE_MSK;
rate_v2 |= rate_v1 & RATE_VHT_MCS_MIMO2_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_v2 |= he_gi_ltf << RATE_MCS_HE_GI_LTF_POS;
rate_v2 |= he_type << RATE_MCS_HE_TYPE_POS;
rate_v2 |= he_106t << RATE_MCS_HE_106T_POS;
rate_v2 |= rate_v1 & RATE_HE_DUAL_CARRIER_MODE_MSK;
rate_v2 |= RATE_MCS_HE_MSK;
} else {
rate_v2 |= RATE_MCS_VHT_MSK;
}
/* 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_v2 |= legacy_rate;
if (!(rate_v1 & RATE_MCS_CCK_MSK_V1))
rate_v2 |= RATE_MCS_LEGACY_OFDM_MSK;
}
/* convert flags */
if (rate_v1 & RATE_MCS_LDPC_MSK_V1)
rate_v2 |= RATE_MCS_LDPC_MSK;
rate_v2 |= (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_v2 |= RATE_MCS_DUP_MSK;
rate_v2 |= dup << RATE_MCS_CHAN_WIDTH_POS;
}
if ((!(rate_v1 & RATE_MCS_HE_MSK_V1)) &&
(rate_v1 & RATE_MCS_SGI_MSK_V1))
rate_v2 |= RATE_MCS_SGI_MSK;
return rate_v2;
}
IWL_EXPORT_SYMBOL(iwl_new_rate_from_v1);
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;
bool sgi;
if (format == RATE_MCS_CCK_MSK ||
format == RATE_MCS_LEGACY_OFDM_MSK) {
int legacy_rate = rate & RATE_LEGACY_RATE_MSK;
int index = format == RATE_MCS_CCK_MSK ?
legacy_rate :
legacy_rate + IWL_FIRST_OFDM_RATE;
return scnprintf(buf, bufsz, "Legacy | ANT: %s Rate: %s Mbps",
iwl_rs_pretty_ant(ant),
index == IWL_RATE_INVALID ? "BAD" :
iwl_rate_mcs(index)->mbps);
}
if (format == RATE_MCS_VHT_MSK)
type = "VHT";
else if (format == RATE_MCS_HT_MSK)
type = "HT";
else if (format == RATE_MCS_HE_MSK)
type = "HE";
else
type = "Unknown"; /* shouldn't happen */
mcs = format == RATE_MCS_HT_MSK ?
RATE_HT_MCS_INDEX(rate) :
rate & RATE_MCS_CODE_MSK;
nss = ((rate & RATE_MCS_NSS_MSK)
>> RATE_MCS_NSS_POS) + 1;
sgi = format == RATE_MCS_HE_MSK ?
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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