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// SPDX-License-Identifier: GPL-2.0-only
/*
* nxpwifi 802.11ac helpers
* Copyright 2011-2024 NXP
*/
#include "cfg.h"
#include "fw.h"
#include "main.h"
#include "11ac.h"
/* Map VHT MCS/NSS to highest data rate (Mbps), long GI. */
static const u16 max_rate_lgi_80MHZ[8][3] = {
{0x124, 0x15F, 0x186}, /* NSS = 1 */
{0x249, 0x2BE, 0x30C}, /* NSS = 2 */
{0x36D, 0x41D, 0x492}, /* NSS = 3 */
{0x492, 0x57C, 0x618}, /* NSS = 4 */
{0x5B6, 0x6DB, 0x79E}, /* NSS = 5 */
{0x6DB, 0x83A, 0x0}, /* NSS = 6 */
{0x7FF, 0x999, 0xAAA}, /* NSS = 7 */
{0x924, 0xAF8, 0xC30} /* NSS = 8 */
};
static const u16 max_rate_lgi_160MHZ[8][3] = {
{0x249, 0x2BE, 0x30C}, /* NSS = 1 */
{0x492, 0x57C, 0x618}, /* NSS = 2 */
{0x6DB, 0x83A, 0x0}, /* NSS = 3 */
{0x924, 0xAF8, 0xC30}, /* NSS = 4 */
{0xB6D, 0xDB6, 0xF3C}, /* NSS = 5 */
{0xDB6, 0x1074, 0x1248}, /* NSS = 6 */
{0xFFF, 0x1332, 0x1554}, /* NSS = 7 */
{0x1248, 0x15F0, 0x1860} /* NSS = 8 */
};
/* Convert 2-bit MCS map to highest long-GI VHT data rate. */
static u16
nxpwifi_convert_mcsmap_to_maxrate(struct nxpwifi_private *priv,
u16 bands, u16 mcs_map)
{
u8 i, nss, mcs;
u16 max_rate = 0;
u32 usr_vht_cap_info = 0;
struct nxpwifi_adapter *adapter = priv->adapter;
if (bands & BAND_AAC)
usr_vht_cap_info = adapter->usr_dot_11ac_dev_cap_a;
else
usr_vht_cap_info = adapter->usr_dot_11ac_dev_cap_bg;
/* Find max supported NSS. */
nss = 1;
for (i = 1; i <= 8; i++) {
mcs = GET_VHTNSSMCS(mcs_map, i);
if (mcs < IEEE80211_VHT_MCS_NOT_SUPPORTED)
nss = i;
}
mcs = GET_VHTNSSMCS(mcs_map, nss);
/* If not supported, fall back to 0-9. */
if (mcs == IEEE80211_VHT_MCS_NOT_SUPPORTED)
mcs = IEEE80211_VHT_MCS_SUPPORT_0_9;
if (u32_get_bits(usr_vht_cap_info, IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK)) {
/* Support 160 MHz. */
max_rate = max_rate_lgi_160MHZ[nss - 1][mcs];
if (!max_rate)
/* MCS9 not supported in NSS6. */
max_rate = max_rate_lgi_160MHZ[nss - 1][mcs - 1];
} else {
max_rate = max_rate_lgi_80MHZ[nss - 1][mcs];
if (!max_rate)
/* MCS9 not supported in NSS3. */
max_rate = max_rate_lgi_80MHZ[nss - 1][mcs - 1];
}
return max_rate;
}
static void
nxpwifi_fill_vht_cap_info(struct nxpwifi_private *priv,
struct ieee80211_vht_cap *vht_cap, u16 bands)
{
struct nxpwifi_adapter *adapter = priv->adapter;
if (bands & BAND_A)
vht_cap->vht_cap_info =
cpu_to_le32(adapter->usr_dot_11ac_dev_cap_a);
else
vht_cap->vht_cap_info =
cpu_to_le32(adapter->usr_dot_11ac_dev_cap_bg);
}
void
nxpwifi_fill_vht_cap_tlv(struct nxpwifi_private *priv,
struct ieee80211_vht_cap *vht_cap, u16 bands)
{
struct nxpwifi_adapter *adapter = priv->adapter;
u16 mcs_map_user, mcs_map_resp, mcs_map_result;
u16 mcs_user, mcs_resp, nss, tmp;
/* Fill VHT capability info. */
nxpwifi_fill_vht_cap_info(priv, vht_cap, bands);
/* RX MCS set: min(user, AP). */
mcs_map_user = GET_DEVRXMCSMAP(adapter->usr_dot_11ac_mcs_support);
mcs_map_resp = le16_to_cpu(vht_cap->supp_mcs.rx_mcs_map);
mcs_map_result = 0;
for (nss = 1; nss <= 8; nss++) {
mcs_user = GET_VHTNSSMCS(mcs_map_user, nss);
mcs_resp = GET_VHTNSSMCS(mcs_map_resp, nss);
if (mcs_user == IEEE80211_VHT_MCS_NOT_SUPPORTED ||
mcs_resp == IEEE80211_VHT_MCS_NOT_SUPPORTED)
SET_VHTNSSMCS(mcs_map_result, nss,
IEEE80211_VHT_MCS_NOT_SUPPORTED);
else
SET_VHTNSSMCS(mcs_map_result, nss,
min(mcs_user, mcs_resp));
}
vht_cap->supp_mcs.rx_mcs_map = cpu_to_le16(mcs_map_result);
tmp = nxpwifi_convert_mcsmap_to_maxrate(priv, bands, mcs_map_result);
vht_cap->supp_mcs.rx_highest = cpu_to_le16(tmp);
/* TX MCS set: min(user, AP). */
mcs_map_user = GET_DEVTXMCSMAP(adapter->usr_dot_11ac_mcs_support);
mcs_map_resp = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
mcs_map_result = 0;
for (nss = 1; nss <= 8; nss++) {
mcs_user = GET_VHTNSSMCS(mcs_map_user, nss);
mcs_resp = GET_VHTNSSMCS(mcs_map_resp, nss);
if (mcs_user == IEEE80211_VHT_MCS_NOT_SUPPORTED ||
mcs_resp == IEEE80211_VHT_MCS_NOT_SUPPORTED)
SET_VHTNSSMCS(mcs_map_result, nss,
IEEE80211_VHT_MCS_NOT_SUPPORTED);
else
SET_VHTNSSMCS(mcs_map_result, nss,
min(mcs_user, mcs_resp));
}
vht_cap->supp_mcs.tx_mcs_map = cpu_to_le16(mcs_map_result);
tmp = nxpwifi_convert_mcsmap_to_maxrate(priv, bands, mcs_map_result);
vht_cap->supp_mcs.tx_highest = cpu_to_le16(tmp);
}
int nxpwifi_cmd_append_11ac_tlv(struct nxpwifi_private *priv,
struct nxpwifi_bssdescriptor *bss_desc,
u8 **buffer)
{
struct nxpwifi_ie_types_vhtcap *vht_cap;
struct nxpwifi_ie_types_oper_mode_ntf *oper_ntf;
struct ieee_types_oper_mode_ntf *ieee_oper_ntf;
struct nxpwifi_ie_types_vht_oper *vht_op;
struct nxpwifi_adapter *adapter = priv->adapter;
u8 supp_chwd_set;
u32 usr_vht_cap_info;
int ret_len = 0;
if (bss_desc->bss_band & BAND_A)
usr_vht_cap_info = adapter->usr_dot_11ac_dev_cap_a;
else
usr_vht_cap_info = adapter->usr_dot_11ac_dev_cap_bg;
/* VHT Capabilities element. */
if (bss_desc->bcn_vht_cap) {
vht_cap = (struct nxpwifi_ie_types_vhtcap *)*buffer;
memset(vht_cap, 0, sizeof(*vht_cap));
vht_cap->header.type = cpu_to_le16(WLAN_EID_VHT_CAPABILITY);
vht_cap->header.len =
cpu_to_le16(sizeof(struct ieee80211_vht_cap));
memcpy((u8 *)vht_cap + sizeof(struct nxpwifi_ie_types_header),
(u8 *)bss_desc->bcn_vht_cap,
le16_to_cpu(vht_cap->header.len));
nxpwifi_fill_vht_cap_tlv(priv, &vht_cap->vht_cap,
bss_desc->bss_band);
*buffer += sizeof(*vht_cap);
ret_len += sizeof(*vht_cap);
}
/* VHT Operation element. */
if (bss_desc->bcn_vht_oper) {
if (priv->bss_mode == NL80211_IFTYPE_STATION) {
vht_op = (struct nxpwifi_ie_types_vht_oper *)*buffer;
memset(vht_op, 0, sizeof(*vht_op));
vht_op->header.type =
cpu_to_le16(WLAN_EID_VHT_OPERATION);
vht_op->header.len = cpu_to_le16(sizeof(*vht_op) -
sizeof(struct nxpwifi_ie_types_header));
memcpy((u8 *)vht_op +
sizeof(struct nxpwifi_ie_types_header),
(u8 *)bss_desc->bcn_vht_oper,
le16_to_cpu(vht_op->header.len));
/* Negotiate channel width; keep peer's center freq. */
supp_chwd_set = u32_get_bits(usr_vht_cap_info,
IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK);
switch (supp_chwd_set) {
case 0:
vht_op->chan_width =
min_t(u8, IEEE80211_VHT_CHANWIDTH_80MHZ,
bss_desc->bcn_vht_oper->chan_width);
break;
case 1:
vht_op->chan_width =
min_t(u8, IEEE80211_VHT_CHANWIDTH_160MHZ,
bss_desc->bcn_vht_oper->chan_width);
break;
case 2:
vht_op->chan_width =
min_t(u8, IEEE80211_VHT_CHANWIDTH_80P80MHZ,
bss_desc->bcn_vht_oper->chan_width);
break;
default:
vht_op->chan_width =
IEEE80211_VHT_CHANWIDTH_USE_HT;
break;
}
*buffer += sizeof(*vht_op);
ret_len += sizeof(*vht_op);
}
}
/* Operating Mode Notification element. */
if (bss_desc->oper_mode) {
ieee_oper_ntf = bss_desc->oper_mode;
oper_ntf = (void *)*buffer;
memset(oper_ntf, 0, sizeof(*oper_ntf));
oper_ntf->header.type = cpu_to_le16(WLAN_EID_OPMODE_NOTIF);
oper_ntf->header.len = cpu_to_le16(sizeof(u8));
oper_ntf->oper_mode = ieee_oper_ntf->oper_mode;
*buffer += sizeof(*oper_ntf);
ret_len += sizeof(*oper_ntf);
}
return ret_len;
}
int nxpwifi_cmd_11ac_cfg(struct nxpwifi_private *priv,
struct host_cmd_ds_command *cmd, u16 cmd_action,
struct nxpwifi_11ac_vht_cfg *cfg)
{
struct host_cmd_11ac_vht_cfg *vhtcfg = &cmd->params.vht_cfg;
cmd->command = cpu_to_le16(HOST_CMD_11AC_CFG);
cmd->size = cpu_to_le16(sizeof(struct host_cmd_11ac_vht_cfg) +
S_DS_GEN);
vhtcfg->action = cpu_to_le16(cmd_action);
vhtcfg->band_config = cfg->band_config;
vhtcfg->misc_config = cfg->misc_config;
vhtcfg->cap_info = cpu_to_le32(cfg->cap_info);
vhtcfg->mcs_tx_set = cpu_to_le32(cfg->mcs_tx_set);
vhtcfg->mcs_rx_set = cpu_to_le32(cfg->mcs_rx_set);
return 0;
}
/* Initialize BlockAck parameters for 11ac. */
void nxpwifi_set_11ac_ba_params(struct nxpwifi_private *priv)
{
priv->add_ba_param.timeout = NXPWIFI_DEFAULT_BLOCK_ACK_TIMEOUT;
if (GET_BSS_ROLE(priv) == NXPWIFI_BSS_ROLE_UAP) {
priv->add_ba_param.tx_win_size =
NXPWIFI_11AC_UAP_AMPDU_DEF_TXWINSIZE;
priv->add_ba_param.rx_win_size =
NXPWIFI_11AC_UAP_AMPDU_DEF_RXWINSIZE;
} else {
priv->add_ba_param.tx_win_size =
NXPWIFI_11AC_STA_AMPDU_DEF_TXWINSIZE;
priv->add_ba_param.rx_win_size =
NXPWIFI_11AC_STA_AMPDU_DEF_RXWINSIZE;
}
}
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