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rtw_beamforming.c
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/******************************************************************************
*
* Copyright(c) 2007 - 2017 Realtek Corporation.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
*****************************************************************************/
#define _RTW_BEAMFORMING_C_
#include <drv_types.h>
#include <hal_data.h>
#ifdef CONFIG_BEAMFORMING
#ifdef RTW_BEAMFORMING_VERSION_2
struct ndpa_sta_info {
u16 aid:12;
u16 feedback_type:1;
u16 nc_index:3;
};
static void _get_txvector_parameter(PADAPTER adapter, struct sta_info *sta, u8 *g_id, u16 *p_aid)
{
struct mlme_priv *mlme;
u16 aid;
u8 *bssid;
u16 val16;
mlme = &adapter->mlmepriv;
if (check_fwstate(mlme, WIFI_AP_STATE)) {
/*
* Sent by an AP and addressed to a STA associated with that AP
* or sent by a DLS or TDLS STA in a direct path to
* a DLS or TDLS peer STA
*/
aid = sta->cmn.aid;
bssid = adapter_mac_addr(adapter);
RTW_INFO("%s: AID=0x%x BSSID=" MAC_FMT "\n",
__FUNCTION__, sta->cmn.aid, MAC_ARG(bssid));
/* AID[0:8] */
aid &= 0x1FF;
/* BSSID[44:47] xor BSSID[40:43] */
val16 = ((bssid[5] & 0xF0) >> 4) ^ (bssid[5] & 0xF);
/* (dec(AID[0:8]) + dec(BSSID)*2^5) mod 2^9 */
*p_aid = (aid + (val16 << 5)) & 0x1FF;
*g_id = 63;
} else if ((check_fwstate(mlme, WIFI_ADHOC_STATE) == _TRUE)
|| (check_fwstate(mlme, WIFI_ADHOC_MASTER_STATE) == _TRUE)) {
/*
* Otherwise, includes
* 1. Sent to an IBSS STA
* 2. Sent by an AP to a non associated STA
* 3. Sent to a STA for which it is not known
* which condition is applicable
*/
*p_aid = 0;
*g_id = 63;
} else {
/* Addressed to AP */
bssid = sta->cmn.mac_addr;
RTW_INFO("%s: BSSID=" MAC_FMT "\n", __FUNCTION__, MAC_ARG(bssid));
/* BSSID[39:47] */
*p_aid = (bssid[5] << 1) | (bssid[4] >> 7);
*g_id = 0;
}
RTW_INFO("%s: GROUP_ID=0x%02x PARTIAL_AID=0x%04x\n",
__FUNCTION__, *g_id, *p_aid);
}
/*
* Parameters
* adapter struct _adapter*
* sta struct sta_info*
* sta_bf_cap beamforming capabe of sta
* sounding_dim Number of Sounding Dimensions
* comp_steering Compressed Steering Number of Beamformer Antennas Supported
*/
static void _get_sta_beamform_cap(PADAPTER adapter, struct sta_info *sta,
u8 *sta_bf_cap, u8 *sounding_dim, u8 *comp_steering)
{
struct beamforming_info *info;
struct ht_priv *ht;
#ifdef CONFIG_80211AC_VHT
struct vht_priv *vht;
#endif /* CONFIG_80211AC_VHT */
u16 bf_cap;
*sta_bf_cap = 0;
*sounding_dim = 0;
*comp_steering = 0;
info = GET_BEAMFORM_INFO(adapter);
ht = &adapter->mlmepriv.htpriv;
#ifdef CONFIG_80211AC_VHT
vht = &adapter->mlmepriv.vhtpriv;
#endif /* CONFIG_80211AC_VHT */
if (is_supported_ht(sta->wireless_mode) == _TRUE) {
/* HT */
bf_cap = ht->beamform_cap;
if (TEST_FLAG(bf_cap, BEAMFORMING_HT_BEAMFORMEE_ENABLE)) {
info->beamforming_cap |= BEAMFORMEE_CAP_HT_EXPLICIT;
*sta_bf_cap |= BEAMFORMER_CAP_HT_EXPLICIT;
*sounding_dim = (bf_cap & BEAMFORMING_HT_BEAMFORMEE_CHNL_EST_CAP) >> 6;
}
if (TEST_FLAG(bf_cap, BEAMFORMING_HT_BEAMFORMER_ENABLE)) {
info->beamforming_cap |= BEAMFORMER_CAP_HT_EXPLICIT;
*sta_bf_cap |= BEAMFORMEE_CAP_HT_EXPLICIT;
*comp_steering = (bf_cap & BEAMFORMING_HT_BEAMFORMER_STEER_NUM) >> 4;
}
}
#ifdef CONFIG_80211AC_VHT
if (is_supported_vht(sta->wireless_mode) == _TRUE) {
/* VHT */
bf_cap = vht->beamform_cap;
/* We are SU Beamformee because the STA is SU Beamformer */
if (TEST_FLAG(bf_cap, BEAMFORMING_VHT_BEAMFORMEE_ENABLE)) {
info->beamforming_cap |= BEAMFORMEE_CAP_VHT_SU;
*sta_bf_cap |= BEAMFORMER_CAP_VHT_SU;
/* We are MU Beamformee because the STA is MU Beamformer */
if (TEST_FLAG(bf_cap, BEAMFORMING_VHT_MU_MIMO_STA_ENABLE)) {
info->beamforming_cap |= BEAMFORMEE_CAP_VHT_MU;
*sta_bf_cap |= BEAMFORMER_CAP_VHT_MU;
}
*sounding_dim = (bf_cap & BEAMFORMING_VHT_BEAMFORMEE_SOUND_DIM) >> 12;
}
/* We are SU Beamformer because the STA is SU Beamformee */
if (TEST_FLAG(bf_cap, BEAMFORMING_VHT_BEAMFORMER_ENABLE)) {
info->beamforming_cap |= BEAMFORMER_CAP_VHT_SU;
*sta_bf_cap |= BEAMFORMEE_CAP_VHT_SU;
/* We are MU Beamformer because the STA is MU Beamformee */
if (TEST_FLAG(bf_cap, BEAMFORMING_VHT_MU_MIMO_AP_ENABLE)) {
info->beamforming_cap |= BEAMFORMER_CAP_VHT_MU;
*sta_bf_cap |= BEAMFORMEE_CAP_VHT_MU;
}
*comp_steering = (bf_cap & BEAMFORMING_VHT_BEAMFORMER_STS_CAP) >> 8;
}
}
#endif /* CONFIG_80211AC_VHT */
}
static u8 _send_ht_ndpa_packet(PADAPTER adapter, u8 *ra, enum channel_width bw)
{
/* General */
struct xmit_priv *pxmitpriv;
struct mlme_ext_priv *pmlmeext;
struct mlme_ext_info *pmlmeinfo;
struct xmit_frame *pmgntframe;
/* Beamforming */
struct beamformee_entry *bfee;
u8 ActionHdr[4] = {ACT_CAT_VENDOR, 0x00, 0xE0, 0x4C};
/* MISC */
struct pkt_attrib *attrib;
struct rtw_ieee80211_hdr *pwlanhdr;
enum MGN_RATE txrate;
u8 *pframe;
u16 duration = 0;
u8 aSifsTime = 0;
RTW_INFO("+%s: Send to " MAC_FMT "\n", __FUNCTION__, MAC_ARG(ra));
pxmitpriv = &adapter->xmitpriv;
pmlmeext = &adapter->mlmeextpriv;
pmlmeinfo = &pmlmeext->mlmext_info;
bfee = rtw_bf_bfee_get_entry_by_addr(adapter, ra);
if (!bfee) {
RTW_ERR("%s: Cann't find beamformee entry!\n", __FUNCTION__);
return _FALSE;
}
pmgntframe = alloc_mgtxmitframe(pxmitpriv);
if (!pmgntframe) {
RTW_ERR("%s: alloc mgnt frame fail!\n", __FUNCTION__);
return _FALSE;
}
txrate = beamforming_get_htndp_tx_rate(GET_PDM_ODM(adapter), bfee->comp_steering_num_of_bfer);
/* update attribute */
attrib = &pmgntframe->attrib;
update_mgntframe_attrib(adapter, attrib);
/*attrib->type = WIFI_MGT_TYPE;*/ /* set in update_mgntframe_attrib() */
attrib->subtype = WIFI_ACTION_NOACK;
attrib->bwmode = bw;
/*attrib->qsel = QSLT_MGNT;*/ /* set in update_mgntframe_attrib() */
attrib->order = 1;
attrib->rate = (u8)txrate;
attrib->bf_pkt_type = 0;
_rtw_memset(pmgntframe->buf_addr, 0, WLANHDR_OFFSET + TXDESC_OFFSET);
pframe = (u8 *)(pmgntframe->buf_addr) + TXDESC_OFFSET;
pwlanhdr = (struct rtw_ieee80211_hdr *)pframe;
/* Frame control */
pwlanhdr->frame_ctl = 0;
set_frame_sub_type(pframe, attrib->subtype);
set_order_bit(pframe);
/* Duration */
if (pmlmeext->cur_wireless_mode == WIRELESS_11B)
aSifsTime = 10;
else
aSifsTime = 16;
duration = 2 * aSifsTime + 40;
if (bw == CHANNEL_WIDTH_40)
duration += 87;
else
duration += 180;
set_duration(pframe, duration);
/* DA */
_rtw_memcpy(pwlanhdr->addr1, ra, ETH_ALEN);
/* SA */
_rtw_memcpy(pwlanhdr->addr2, adapter_mac_addr(adapter), ETH_ALEN);
/* BSSID */
_rtw_memcpy(pwlanhdr->addr3, get_my_bssid(&pmlmeinfo->network), ETH_ALEN);
/* HT control field */
SET_HT_CTRL_CSI_STEERING(pframe + 24, 3);
SET_HT_CTRL_NDP_ANNOUNCEMENT(pframe + 24, 1);
/*
* Frame Body
* Category field: vender-specific value, 0x7F
* OUI: 0x00E04C
*/
_rtw_memcpy(pframe + 28, ActionHdr, 4);
attrib->pktlen = 32;
attrib->last_txcmdsz = attrib->pktlen;
dump_mgntframe(adapter, pmgntframe);
return _TRUE;
}
static u8 _send_vht_ndpa_packet(PADAPTER adapter, u8 *ra, u16 aid, enum channel_width bw)
{
/* General */
struct xmit_priv *pxmitpriv;
struct mlme_ext_priv *pmlmeext;
struct xmit_frame *pmgntframe;
/* Beamforming */
struct beamforming_info *info;
struct beamformee_entry *bfee;
struct ndpa_sta_info sta_info;
/* MISC */
struct pkt_attrib *attrib;
struct rtw_ieee80211_hdr *pwlanhdr;
u8 *pframe;
enum MGN_RATE txrate;
u16 duration = 0;
u8 sequence = 0, aSifsTime = 0;
RTW_INFO("+%s: Send to " MAC_FMT "\n", __FUNCTION__, MAC_ARG(ra));
pxmitpriv = &adapter->xmitpriv;
pmlmeext = &adapter->mlmeextpriv;
info = GET_BEAMFORM_INFO(adapter);
bfee = rtw_bf_bfee_get_entry_by_addr(adapter, ra);
if (!bfee) {
RTW_ERR("%s: Cann't find beamformee entry!\n", __FUNCTION__);
return _FALSE;
}
pmgntframe = alloc_mgtxmitframe(pxmitpriv);
if (!pmgntframe) {
RTW_ERR("%s: alloc mgnt frame fail!\n", __FUNCTION__);
return _FALSE;
}
txrate = beamforming_get_vht_ndp_tx_rate(GET_PDM_ODM(adapter), bfee->comp_steering_num_of_bfer);
/* update attribute */
attrib = &pmgntframe->attrib;
update_mgntframe_attrib(adapter, attrib);
/*pattrib->type = WIFI_MGT_TYPE;*/ /* set in update_mgntframe_attrib() */
attrib->subtype = WIFI_NDPA;
attrib->bwmode = bw;
/*attrib->qsel = QSLT_MGNT;*/ /* set in update_mgntframe_attrib() */
attrib->rate = (u8)txrate;
attrib->bf_pkt_type = 0;
_rtw_memset(pmgntframe->buf_addr, 0, TXDESC_OFFSET + WLANHDR_OFFSET);
pframe = pmgntframe->buf_addr + TXDESC_OFFSET;
pwlanhdr = (struct rtw_ieee80211_hdr *)pframe;
/* Frame control */
pwlanhdr->frame_ctl = 0;
set_frame_sub_type(pframe, attrib->subtype);
/* Duration */
if (is_supported_5g(pmlmeext->cur_wireless_mode) || is_supported_ht(pmlmeext->cur_wireless_mode))
aSifsTime = 16;
else
aSifsTime = 10;
duration = 2 * aSifsTime + 44;
if (bw == CHANNEL_WIDTH_80)
duration += 40;
else if (bw == CHANNEL_WIDTH_40)
duration += 87;
else
duration += 180;
set_duration(pframe, duration);
/* RA */
_rtw_memcpy(pwlanhdr->addr1, ra, ETH_ALEN);
/* TA */
_rtw_memcpy(pwlanhdr->addr2, adapter_mac_addr(adapter), ETH_ALEN);
/* Sounding Sequence, bit0~1 is reserved */
sequence = info->sounding_sequence << 2;
if (info->sounding_sequence >= 0x3f)
info->sounding_sequence = 0;
else
info->sounding_sequence++;
_rtw_memcpy(pframe + 16, &sequence, 1);
/* STA Info */
/*
* "AID12" Equal to 0 if the STA is an AP, mesh STA or
* STA that is a member of an IBSS
*/
if (check_fwstate(&adapter->mlmepriv, WIFI_AP_STATE) == _FALSE)
aid = 0;
sta_info.aid = aid;
/* "Feedback Type" set to 0 for SU */
sta_info.feedback_type = 0;
/* "Nc Index" reserved if the Feedback Type field indicates SU */
sta_info.nc_index = 0;
_rtw_memcpy(pframe + 17, (u8 *)&sta_info, 2);
attrib->pktlen = 19;
attrib->last_txcmdsz = attrib->pktlen;
dump_mgntframe(adapter, pmgntframe);
return _TRUE;
}
static u8 _send_vht_mu_ndpa_packet(PADAPTER adapter, enum channel_width bw)
{
/* General */
struct xmit_priv *pxmitpriv;
struct mlme_ext_priv *pmlmeext;
struct xmit_frame *pmgntframe;
/* Beamforming */
struct beamforming_info *info;
struct sounding_info *sounding;
struct beamformee_entry *bfee;
struct ndpa_sta_info sta_info;
/* MISC */
struct pkt_attrib *attrib;
struct rtw_ieee80211_hdr *pwlanhdr;
enum MGN_RATE txrate;
u8 *pframe;
u8 *ra = NULL;
u16 duration = 0;
u8 sequence = 0, aSifsTime = 0;
u8 i;
RTW_INFO("+%s\n", __FUNCTION__);
pxmitpriv = &adapter->xmitpriv;
pmlmeext = &adapter->mlmeextpriv;
info = GET_BEAMFORM_INFO(adapter);
sounding = &info->sounding_info;
txrate = MGN_VHT2SS_MCS0;
/*
* Fill the first MU BFee entry (STA1) MAC addr to destination address then
* HW will change A1 to broadcast addr.
* 2015.05.28. Suggested by SD1 Chunchu.
*/
bfee = &info->bfee_entry[sounding->mu_sounding_list[0]];
ra = bfee->mac_addr;
pmgntframe = alloc_mgtxmitframe(pxmitpriv);
if (!pmgntframe) {
RTW_ERR("%s: alloc mgnt frame fail!\n", __FUNCTION__);
return _FALSE;
}
/* update attribute */
attrib = &pmgntframe->attrib;
update_mgntframe_attrib(adapter, attrib);
/*attrib->type = WIFI_MGT_TYPE;*/ /* set in update_mgntframe_attrib() */
attrib->subtype = WIFI_NDPA;
attrib->bwmode = bw;
/*attrib->qsel = QSLT_MGNT;*/ /* set in update_mgntframe_attrib() */
attrib->rate = (u8)txrate;
/* Set TxBFPktType of Tx desc to unicast type if there is only one MU STA for HW design */
if (info->sounding_info.candidate_mu_bfee_cnt > 1)
attrib->bf_pkt_type = 1;
else
attrib->bf_pkt_type = 0;
_rtw_memset(pmgntframe->buf_addr, 0, TXDESC_OFFSET + WLANHDR_OFFSET);
pframe = pmgntframe->buf_addr + TXDESC_OFFSET;
pwlanhdr = (struct rtw_ieee80211_hdr *)pframe;
/* Frame control */
pwlanhdr->frame_ctl = 0;
set_frame_sub_type(pframe, attrib->subtype);
/* Duration */
if (is_supported_5g(pmlmeext->cur_wireless_mode) || is_supported_ht(pmlmeext->cur_wireless_mode))
aSifsTime = 16;
else
aSifsTime = 10;
duration = 2 * aSifsTime + 44;
if (bw == CHANNEL_WIDTH_80)
duration += 40;
else if (bw == CHANNEL_WIDTH_40)
duration += 87;
else
duration += 180;
set_duration(pframe, duration);
/* RA */
_rtw_memcpy(pwlanhdr->addr1, ra, ETH_ALEN);
/* TA */
_rtw_memcpy(pwlanhdr->addr2, adapter_mac_addr(adapter), ETH_ALEN);
/* Sounding Sequence, bit0~1 is reserved */
sequence = info->sounding_sequence << 2;
if (info->sounding_sequence >= 0x3f)
info->sounding_sequence = 0;
else
info->sounding_sequence++;
_rtw_memcpy(pframe + 16, &sequence, 1);
attrib->pktlen = 17;
/*
* Construct STA info. for multiple STAs
* STA Info1, ..., STA Info n
*/
for (i = 0; i < sounding->candidate_mu_bfee_cnt; i++) {
bfee = &info->bfee_entry[sounding->mu_sounding_list[i]];
sta_info.aid = bfee->aid;
sta_info.feedback_type = 1; /* 1'b1: MU */
sta_info.nc_index = 0;
_rtw_memcpy(pframe + attrib->pktlen, (u8 *)&sta_info, 2);
attrib->pktlen += 2;
}
attrib->last_txcmdsz = attrib->pktlen;
dump_mgntframe(adapter, pmgntframe);
return _TRUE;
}
static u8 _send_bf_report_poll(PADAPTER adapter, u8 *ra, u8 bFinalPoll)
{
/* General */
struct xmit_priv *pxmitpriv;
struct xmit_frame *pmgntframe;
/* MISC */
struct pkt_attrib *attrib;
struct rtw_ieee80211_hdr *pwlanhdr;
u8 *pframe;
RTW_INFO("+%s: Send to " MAC_FMT "\n", __FUNCTION__, MAC_ARG(ra));
pxmitpriv = &adapter->xmitpriv;
pmgntframe = alloc_mgtxmitframe(pxmitpriv);
if (!pmgntframe) {
RTW_ERR("%s: alloc mgnt frame fail!\n", __FUNCTION__);
return _FALSE;
}
/* update attribute */
attrib = &pmgntframe->attrib;
update_mgntframe_attrib(adapter, attrib);
/*attrib->type = WIFI_MGT_TYPE;*/ /* set in update_mgntframe_attrib() */
attrib->subtype = WIFI_BF_REPORT_POLL;
attrib->bwmode = CHANNEL_WIDTH_20;
/*attrib->qsel = QSLT_MGNT;*/ /* set in update_mgntframe_attrib() */
attrib->rate = MGN_6M;
if (bFinalPoll)
attrib->bf_pkt_type = 3;
else
attrib->bf_pkt_type = 2;
_rtw_memset(pmgntframe->buf_addr, 0, TXDESC_OFFSET + WLANHDR_OFFSET);
pframe = pmgntframe->buf_addr + TXDESC_OFFSET;
pwlanhdr = (struct rtw_ieee80211_hdr *)pframe;
/* Frame control */
pwlanhdr->frame_ctl = 0;
set_frame_sub_type(pframe, attrib->subtype);
/* Duration */
set_duration(pframe, 100);
/* RA */
_rtw_memcpy(pwlanhdr->addr1, ra, ETH_ALEN);
/* TA */
_rtw_memcpy(pwlanhdr->addr2, adapter_mac_addr(adapter), ETH_ALEN);
/* Feedback Segment Retransmission Bitmap */
pframe[16] = 0xFF;
attrib->pktlen = 17;
attrib->last_txcmdsz = attrib->pktlen;
dump_mgntframe(adapter, pmgntframe);
return _TRUE;
}
static void _sounding_update_min_period(PADAPTER adapter, u16 period, u8 leave)
{
struct beamforming_info *info;
struct beamformee_entry *bfee;
u8 i = 0;
u16 min_val = 0xFFFF;
info = GET_BEAMFORM_INFO(adapter);
if (_TRUE == leave) {
/*
* When a BFee left,
* we need to find the latest min sounding period
* from the remaining BFees
*/
for (i = 0; i < MAX_BEAMFORMEE_ENTRY_NUM; i++) {
bfee = &info->bfee_entry[i];
if ((bfee->used == _TRUE)
&& (bfee->sound_period < min_val))
min_val = bfee->sound_period;
}
if (min_val == 0xFFFF)
info->sounding_info.min_sounding_period = 0;
else
info->sounding_info.min_sounding_period = min_val;
} else {
if ((info->sounding_info.min_sounding_period == 0)
|| (period < info->sounding_info.min_sounding_period))
info->sounding_info.min_sounding_period = period;
}
}
static void _sounding_init(struct sounding_info *sounding)
{
_rtw_memset(sounding->su_sounding_list, 0xFF, MAX_NUM_BEAMFORMEE_SU);
_rtw_memset(sounding->mu_sounding_list, 0xFF, MAX_NUM_BEAMFORMEE_MU);
sounding->state = SOUNDING_STATE_NONE;
sounding->su_bfee_curidx = 0xFF;
sounding->candidate_mu_bfee_cnt = 0;
sounding->min_sounding_period = 0;
sounding->sound_remain_cnt_per_period = 0;
}
static void _sounding_reset_vars(PADAPTER adapter)
{
struct beamforming_info *info;
struct sounding_info *sounding;
u8 idx;
info = GET_BEAMFORM_INFO(adapter);
sounding = &info->sounding_info;
_rtw_memset(sounding->su_sounding_list, 0xFF, MAX_NUM_BEAMFORMEE_SU);
_rtw_memset(sounding->mu_sounding_list, 0xFF, MAX_NUM_BEAMFORMEE_MU);
sounding->su_bfee_curidx = 0xFF;
sounding->candidate_mu_bfee_cnt = 0;
/* Clear bSound flag for the new period */
for (idx = 0; idx < MAX_BEAMFORMEE_ENTRY_NUM; idx++) {
if ((info->bfee_entry[idx].used == _TRUE)
&& (info->bfee_entry[idx].sounding == _TRUE)) {
info->bfee_entry[idx].sounding = _FALSE;
info->bfee_entry[idx].bCandidateSoundingPeer = _FALSE;
}
}
}
/*
* Return
* 0 Prepare sounding list OK
* -1 Fail to prepare sounding list, because no beamformee need to souding
* -2 Fail to prepare sounding list, because beamformee state not ready
*
*/
static int _sounding_get_list(PADAPTER adapter)
{
struct beamforming_info *info;
struct sounding_info *sounding;
struct beamformee_entry *bfee;
u8 i, mu_idx = 0, su_idx = 0, not_ready = 0;
int ret = 0;
info = GET_BEAMFORM_INFO(adapter);
sounding = &info->sounding_info;
/* Add MU BFee list first because MU priority is higher than SU */
for (i = 0; i < MAX_BEAMFORMEE_ENTRY_NUM; i++) {
bfee = &info->bfee_entry[i];
if (bfee->used == _FALSE)
continue;
if (bfee->state != BEAMFORM_ENTRY_HW_STATE_ADDED) {
RTW_ERR("%s: Invalid BFee idx(%d) Hw state=%d\n", __FUNCTION__, i, bfee->state);
not_ready++;
continue;
}
/*
* Decrease BFee's SoundCnt per period
* If the remain count is 0,
* then it can be sounded at this time
*/
if (bfee->SoundCnt) {
bfee->SoundCnt--;
if (bfee->SoundCnt)
continue;
}
/*
* <tynli_Note>
* If the STA supports MU BFee capability then we add it to MUSoundingList directly
* because we can only sound one STA by unicast NDPA with MU cap enabled to get correct channel info.
* Suggested by BB team Luke Lee. 2015.11.25.
*/
if (bfee->cap & BEAMFORMEE_CAP_VHT_MU) {
/* MU BFee */
if (mu_idx >= MAX_NUM_BEAMFORMEE_MU) {
RTW_ERR("%s: Too much MU bfee entry(Limit:%d)\n", __FUNCTION__, MAX_NUM_BEAMFORMEE_MU);
continue;
}
if (bfee->bApplySounding == _TRUE) {
bfee->bCandidateSoundingPeer = _TRUE;
bfee->SoundCnt = GetInitSoundCnt(bfee->sound_period, sounding->min_sounding_period);
sounding->mu_sounding_list[mu_idx] = i;
mu_idx++;
}
} else if (bfee->cap & (BEAMFORMEE_CAP_VHT_SU|BEAMFORMEE_CAP_HT_EXPLICIT)) {
/* SU BFee (HT/VHT) */
if (su_idx >= MAX_NUM_BEAMFORMEE_SU) {
RTW_ERR("%s: Too much SU bfee entry(Limit:%d)\n", __FUNCTION__, MAX_NUM_BEAMFORMEE_SU);
continue;
}
if (bfee->bDeleteSounding == _TRUE) {
sounding->su_sounding_list[su_idx] = i;
su_idx++;
} else if ((bfee->bApplySounding == _TRUE)
&& (bfee->bSuspendSUCap == _FALSE)) {
bfee->bCandidateSoundingPeer = _TRUE;
bfee->SoundCnt = GetInitSoundCnt(bfee->sound_period, sounding->min_sounding_period);
sounding->su_sounding_list[su_idx] = i;
su_idx++;
}
}
}
sounding->candidate_mu_bfee_cnt = mu_idx;
if (su_idx + mu_idx == 0) {
ret = -1;
if (not_ready)
ret = -2;
}
RTW_INFO("-%s: There are %d SU and %d MU BFees in this sounding period\n", __FUNCTION__, su_idx, mu_idx);
return ret;
}
static void _sounding_handler(PADAPTER adapter)
{
struct beamforming_info *info;
struct sounding_info *sounding;
struct beamformee_entry *bfee;
u8 su_idx, i;
int ret = 0;
static u16 wait_cnt = 0;
info = GET_BEAMFORM_INFO(adapter);
sounding = &info->sounding_info;
RTW_DBG("+%s: state=%d\n", __FUNCTION__, sounding->state);
if ((sounding->state != SOUNDING_STATE_INIT)
&& (sounding->state != SOUNDING_STATE_SU_SOUNDDOWN)
&& (sounding->state != SOUNDING_STATE_MU_SOUNDDOWN)
&& (sounding->state != SOUNDING_STATE_SOUNDING_TIMEOUT)) {
RTW_WARN("%s: Invalid State(%d) and return!\n", __FUNCTION__, sounding->state);
return;
}
if (sounding->state == SOUNDING_STATE_INIT) {
RTW_INFO("%s: Sounding start\n", __FUNCTION__);
/* Init Var */
_sounding_reset_vars(adapter);
/* Get the sounding list of this sounding period */
ret = _sounding_get_list(adapter);
if (ret == -1) {
wait_cnt = 0;
sounding->state = SOUNDING_STATE_NONE;
RTW_ERR("%s: No BFees found, set to SOUNDING_STATE_NONE\n", __FUNCTION__);
info->sounding_running--;
return;
}
if (ret == -2) {
RTW_WARN("%s: Temporarily cann't find BFee to sounding\n", __FUNCTION__);
if (wait_cnt < 5) {
wait_cnt++;
} else {
wait_cnt = 0;
sounding->state = SOUNDING_STATE_NONE;
RTW_ERR("%s: Wait changing state timeout!! Set to SOUNDING_STATE_NONE\n", __FUNCTION__);
}
info->sounding_running--;
return;
}
if (ret != 0) {
wait_cnt = 0;
RTW_ERR("%s: Unkown state(%d)!\n", __FUNCTION__, ret);
info->sounding_running--;
return;
}
wait_cnt = 0;
if (check_fwstate(&adapter->mlmepriv, WIFI_SITE_MONITOR) == _TRUE) {
RTW_INFO("%s: Sounding abort! scanning APs...\n", __FUNCTION__);
info->sounding_running--;
return;
}
rtw_ps_deny(adapter, PS_DENY_BEAMFORMING);
LeaveAllPowerSaveModeDirect(adapter);
}
/* Get non-sound SU BFee index */
for (i = 0; i < MAX_NUM_BEAMFORMEE_SU; i++) {
su_idx = sounding->su_sounding_list[i];
if (su_idx >= MAX_BEAMFORMEE_ENTRY_NUM)
continue;
bfee = &info->bfee_entry[su_idx];
if (_FALSE == bfee->sounding)
break;
}
if (i < MAX_NUM_BEAMFORMEE_SU) {
sounding->su_bfee_curidx = su_idx;
/* Set to sounding start state */
sounding->state = SOUNDING_STATE_SU_START;
RTW_DBG("%s: Set to SOUNDING_STATE_SU_START\n", __FUNCTION__);
bfee->sounding = _TRUE;
/* Reset sounding timeout flag for the new sounding */
bfee->bSoundingTimeout = _FALSE;
if (_TRUE == bfee->bDeleteSounding) {
u8 res = _FALSE;
rtw_bf_cmd(adapter, BEAMFORMING_CTRL_END_PERIOD, &res, 1, 0);
return;
}
/* Start SU sounding */
if (bfee->cap & BEAMFORMEE_CAP_VHT_SU)
_send_vht_ndpa_packet(adapter, bfee->mac_addr, bfee->aid, bfee->sound_bw);
else if (bfee->cap & BEAMFORMEE_CAP_HT_EXPLICIT)
_send_ht_ndpa_packet(adapter, bfee->mac_addr, bfee->sound_bw);
/* Set sounding timeout timer */
_set_timer(&info->sounding_timeout_timer, SU_SOUNDING_TIMEOUT);
return;
}
if (sounding->candidate_mu_bfee_cnt > 0) {
/*
* If there is no SU BFee then find MU BFee and perform MU sounding
*
* <tynli_note> Need to check the MU starting condition. 2015.12.15.
*/
sounding->state = SOUNDING_STATE_MU_START;
RTW_DBG("%s: Set to SOUNDING_STATE_MU_START\n", __FUNCTION__);
/* Update MU BFee info */
for (i = 0; i < sounding->candidate_mu_bfee_cnt; i++) {
bfee = &info->bfee_entry[sounding->mu_sounding_list[i]];
bfee->sounding = _TRUE;
}
/* Send MU NDPA */
bfee = &info->bfee_entry[sounding->mu_sounding_list[0]];
_send_vht_mu_ndpa_packet(adapter, bfee->sound_bw);
/* Send BF report poll if more than 1 MU STA */
for (i = 1; i < sounding->candidate_mu_bfee_cnt; i++) {
bfee = &info->bfee_entry[sounding->mu_sounding_list[i]];
if (i == (sounding->candidate_mu_bfee_cnt - 1))/* The last STA*/
_send_bf_report_poll(adapter, bfee->mac_addr, _TRUE);
else
_send_bf_report_poll(adapter, bfee->mac_addr, _FALSE);
}
sounding->candidate_mu_bfee_cnt = 0;
/* Set sounding timeout timer */
_set_timer(&info->sounding_timeout_timer, MU_SOUNDING_TIMEOUT);
return;
}
info->sounding_running--;
sounding->state = SOUNDING_STATE_INIT;
RTW_INFO("%s: Sounding finished!\n", __FUNCTION__);
rtw_ps_deny_cancel(adapter, PS_DENY_BEAMFORMING);
}
static void _sounding_force_stop(PADAPTER adapter)
{
struct beamforming_info *info;
struct sounding_info *sounding;
info = GET_BEAMFORM_INFO(adapter);
sounding = &info->sounding_info;
if ((sounding->state == SOUNDING_STATE_SU_START)
|| (sounding->state == SOUNDING_STATE_MU_START)) {
u8 res = _FALSE;
_cancel_timer_ex(&info->sounding_timeout_timer);
rtw_bf_cmd(adapter, BEAMFORMING_CTRL_END_PERIOD, &res, 1, 1);
return;
}
info->sounding_running--;
sounding->state = SOUNDING_STATE_INIT;
RTW_INFO("%s: Sounding finished!\n", __FUNCTION__);
rtw_ps_deny_cancel(adapter, PS_DENY_BEAMFORMING);
}
static void _sounding_timer_handler(void *FunctionContext)
{
PADAPTER adapter;
struct beamforming_info *info;
struct sounding_info *sounding;
static u8 delay = 0;
RTW_DBG("+%s\n", __FUNCTION__);
adapter = (PADAPTER)FunctionContext;
info = GET_BEAMFORM_INFO(adapter);
sounding = &info->sounding_info;
if (SOUNDING_STATE_NONE == sounding->state) {
RTW_INFO("%s: Stop!\n", __FUNCTION__);
if (info->sounding_running)
RTW_WARN("%s: souding_running=%d when thread stop!\n",
__FUNCTION__, info->sounding_running);
return;
}
_set_timer(&info->sounding_timer, sounding->min_sounding_period);
if (!info->sounding_running) {
if (SOUNDING_STATE_INIT != sounding->state) {
RTW_WARN("%s: state(%d) != SOUNDING_STATE_INIT!!\n", __FUNCTION__, sounding->state);
sounding->state = SOUNDING_STATE_INIT;
}
delay = 0;
info->sounding_running++;
rtw_bf_cmd(adapter, BEAMFORMING_CTRL_START_PERIOD, NULL, 0, 1);
} else {
if (delay != 0xFF)
delay++;
RTW_WARN("%s: souding is still processing...(state:%d, running:%d, delay:%d)\n",
__FUNCTION__, sounding->state, info->sounding_running, delay);
if (delay > 3) {
RTW_WARN("%s: Stop sounding!!\n", __FUNCTION__);
_sounding_force_stop(adapter);
}
}
}
static void _sounding_timeout_timer_handler(void *FunctionContext)
{
PADAPTER adapter;
struct beamforming_info *info;
struct sounding_info *sounding;
struct beamformee_entry *bfee;
RTW_WARN("+%s\n", __FUNCTION__);
adapter = (PADAPTER)FunctionContext;
info = GET_BEAMFORM_INFO(adapter);
sounding = &info->sounding_info;
if (SOUNDING_STATE_SU_START == sounding->state) {
sounding->state = SOUNDING_STATE_SOUNDING_TIMEOUT;
RTW_ERR("%s: Set to SU SOUNDING_STATE_SOUNDING_TIMEOUT\n", __FUNCTION__);
/* SU BFee */
bfee = &info->bfee_entry[sounding->su_bfee_curidx];
bfee->bSoundingTimeout = _TRUE;
RTW_WARN("%s: The BFee entry[%d] is Sounding Timeout!\n", __FUNCTION__, sounding->su_bfee_curidx);
} else if (SOUNDING_STATE_MU_START == sounding->state) {
sounding->state = SOUNDING_STATE_SOUNDING_TIMEOUT;
RTW_ERR("%s: Set to MU SOUNDING_STATE_SOUNDING_TIMEOUT\n", __FUNCTION__);
} else {
RTW_WARN("%s: unexpected sounding state:0x%02x\n", __FUNCTION__, sounding->state);
return;
}
rtw_bf_cmd(adapter, BEAMFORMING_CTRL_START_PERIOD, NULL, 0, 1);
}
static struct beamformer_entry *_bfer_get_free_entry(PADAPTER adapter)
{
u8 i = 0;
struct beamforming_info *info;
struct beamformer_entry *bfer;
info = GET_BEAMFORM_INFO(adapter);
for (i = 0; i < MAX_BEAMFORMER_ENTRY_NUM; i++) {
bfer = &info->bfer_entry[i];
if (bfer->used == _FALSE)
return bfer;
}
return NULL;
}
static struct beamformer_entry *_bfer_get_entry_by_addr(PADAPTER adapter, u8 *ra)
{
u8 i = 0;
struct beamforming_info *info;
struct beamformer_entry *bfer;
info = GET_BEAMFORM_INFO(adapter);
for (i = 0; i < MAX_BEAMFORMER_ENTRY_NUM; i++) {
bfer = &info->bfer_entry[i];
if (bfer->used == _FALSE)
continue;
if (_rtw_memcmp(ra, bfer->mac_addr, ETH_ALEN) == _TRUE)
return bfer;
}
return NULL;
}
static struct beamformer_entry *_bfer_add_entry(PADAPTER adapter,
struct sta_info *sta, u8 bf_cap, u8 sounding_dim, u8 comp_steering)
{
struct mlme_priv *mlme;
struct beamforming_info *info;
struct beamformer_entry *bfer;
u8 i;