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linux/drivers/net/wireless/intel/iwlwifi/fw/rs.c
Mordechay Goodstein 701404f109 wifi: iwlwifi: rs: add support for parsing max MCS per NSS/BW in 11be 
Rate scale needs to be configured to what MCS it can use per BW and NSS,
this is done by parsing our capabilities of TX and peer's capabilities of
RX and setting the minimum for rate scale usage.

Also do some cleanup removing redundant enum defines not used by
FW/Driver.

Signed-off-by: Mordechay Goodstein <mordechay.goodstein@intel.com>
Link: https://lore.kernel.org/r/20221122220713.f71f3b4c4583.I7b5e8071df91146c4bee3e9bcb7ad62595b275e1@changeid
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
2022-11-28 17:53:06 +02:00

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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 if (format == RATE_MCS_EHT_MSK)
type = "EHT";
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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