diff options
Diffstat (limited to 'drivers/net/wireless/realtek/rtw88/rx.c')
| -rw-r--r-- | drivers/net/wireless/realtek/rtw88/rx.c | 314 |
1 files changed, 314 insertions, 0 deletions
diff --git a/drivers/net/wireless/realtek/rtw88/rx.c b/drivers/net/wireless/realtek/rtw88/rx.c new file mode 100644 index 000000000000..8b0afaaffaa0 --- /dev/null +++ b/drivers/net/wireless/realtek/rtw88/rx.c @@ -0,0 +1,314 @@ +// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause +/* Copyright(c) 2018-2019 Realtek Corporation + */ + +#include "main.h" +#include "rx.h" +#include "ps.h" +#include "debug.h" +#include "fw.h" + +void rtw_rx_stats(struct rtw_dev *rtwdev, struct ieee80211_vif *vif, + struct sk_buff *skb) +{ + struct ieee80211_hdr *hdr; + struct rtw_vif *rtwvif; + + hdr = (struct ieee80211_hdr *)skb->data; + + if (!ieee80211_is_data(hdr->frame_control)) + return; + + if (!is_broadcast_ether_addr(hdr->addr1) && + !is_multicast_ether_addr(hdr->addr1)) { + rtwdev->stats.rx_unicast += skb->len; + rtwdev->stats.rx_cnt++; + if (vif) { + rtwvif = (struct rtw_vif *)vif->drv_priv; + rtwvif->stats.rx_unicast += skb->len; + rtwvif->stats.rx_cnt++; + } + } +} +EXPORT_SYMBOL(rtw_rx_stats); + +struct rtw_rx_addr_match_data { + struct rtw_dev *rtwdev; + struct ieee80211_hdr *hdr; + struct rtw_rx_pkt_stat *pkt_stat; + u8 *bssid; +}; + +static void rtw_rx_phy_stat(struct rtw_dev *rtwdev, + struct rtw_rx_pkt_stat *pkt_stat, + struct ieee80211_hdr *hdr) +{ + struct rtw_dm_info *dm_info = &rtwdev->dm_info; + struct rtw_pkt_count *cur_pkt_cnt = &dm_info->cur_pkt_count; + u8 rate_ss, rate_ss_evm, evm_id; + u8 i, idx; + + dm_info->curr_rx_rate = pkt_stat->rate; + + if (ieee80211_is_beacon(hdr->frame_control)) + cur_pkt_cnt->num_bcn_pkt++; + + switch (pkt_stat->rate) { + case DESC_RATE1M...DESC_RATE11M: + goto pkt_num; + case DESC_RATE6M...DESC_RATE54M: + rate_ss = 0; + rate_ss_evm = 1; + evm_id = RTW_EVM_OFDM; + break; + case DESC_RATEMCS0...DESC_RATEMCS7: + case DESC_RATEVHT1SS_MCS0...DESC_RATEVHT1SS_MCS9: + rate_ss = 1; + rate_ss_evm = 1; + evm_id = RTW_EVM_1SS; + break; + case DESC_RATEMCS8...DESC_RATEMCS15: + case DESC_RATEVHT2SS_MCS0...DESC_RATEVHT2SS_MCS9: + rate_ss = 2; + rate_ss_evm = 2; + evm_id = RTW_EVM_2SS_A; + break; + case DESC_RATEMCS16...DESC_RATEMCS23: + case DESC_RATEVHT3SS_MCS0...DESC_RATEVHT3SS_MCS9: + rate_ss = 3; + rate_ss_evm = 3; + evm_id = RTW_EVM_3SS_A; + break; + default: + rtw_warn(rtwdev, "unknown pkt rate = %d\n", pkt_stat->rate); + return; + } + + for (i = 0; i < rate_ss_evm; i++) { + idx = evm_id + i; + ewma_evm_add(&dm_info->ewma_evm[idx], + dm_info->rx_evm_dbm[i]); + } + + for (i = 0; i < rtwdev->hal.rf_path_num; i++) { + idx = RTW_SNR_OFDM_A + 4 * rate_ss + i; + ewma_snr_add(&dm_info->ewma_snr[idx], + dm_info->rx_snr[i]); + } +pkt_num: + cur_pkt_cnt->num_qry_pkt[pkt_stat->rate]++; +} + +static void rtw_rx_addr_match_iter(void *data, u8 *mac, + struct ieee80211_vif *vif) +{ + struct rtw_rx_addr_match_data *iter_data = data; + struct ieee80211_sta *sta; + struct ieee80211_hdr *hdr = iter_data->hdr; + struct rtw_dev *rtwdev = iter_data->rtwdev; + struct rtw_sta_info *si; + struct rtw_rx_pkt_stat *pkt_stat = iter_data->pkt_stat; + u8 *bssid = iter_data->bssid; + + if (!ether_addr_equal(vif->bss_conf.bssid, bssid)) + return; + + if (!(ether_addr_equal(vif->addr, hdr->addr1) || + ieee80211_is_beacon(hdr->frame_control))) + return; + + rtw_rx_phy_stat(rtwdev, pkt_stat, hdr); + sta = ieee80211_find_sta_by_ifaddr(rtwdev->hw, hdr->addr2, + vif->addr); + if (!sta) + return; + + si = (struct rtw_sta_info *)sta->drv_priv; + ewma_rssi_add(&si->avg_rssi, pkt_stat->rssi); +} + +static void rtw_rx_addr_match(struct rtw_dev *rtwdev, + struct rtw_rx_pkt_stat *pkt_stat, + struct ieee80211_hdr *hdr) +{ + struct rtw_rx_addr_match_data data = {}; + + if (pkt_stat->crc_err || pkt_stat->icv_err || !pkt_stat->phy_status || + ieee80211_is_ctl(hdr->frame_control)) + return; + + data.rtwdev = rtwdev; + data.hdr = hdr; + data.pkt_stat = pkt_stat; + data.bssid = get_hdr_bssid(hdr); + + rtw_iterate_vifs_atomic(rtwdev, rtw_rx_addr_match_iter, &data); +} + +static void rtw_set_rx_freq_by_pktstat(struct rtw_rx_pkt_stat *pkt_stat, + struct ieee80211_rx_status *rx_status) +{ + rx_status->freq = pkt_stat->freq; + rx_status->band = pkt_stat->band; +} + +void rtw_update_rx_freq_from_ie(struct rtw_dev *rtwdev, struct sk_buff *skb, + struct ieee80211_rx_status *rx_status, + struct rtw_rx_pkt_stat *pkt_stat) +{ + struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data; + int channel = rtwdev->hal.current_channel; + size_t hdr_len, ielen; + int channel_number; + u8 *variable; + + if (!test_bit(RTW_FLAG_SCANNING, rtwdev->flags)) + goto fill_rx_status; + + if (ieee80211_is_beacon(mgmt->frame_control)) { + variable = mgmt->u.beacon.variable; + hdr_len = offsetof(struct ieee80211_mgmt, + u.beacon.variable); + } else if (ieee80211_is_probe_resp(mgmt->frame_control)) { + variable = mgmt->u.probe_resp.variable; + hdr_len = offsetof(struct ieee80211_mgmt, + u.probe_resp.variable); + } else { + goto fill_rx_status; + } + + if (skb->len > hdr_len) + ielen = skb->len - hdr_len; + else + goto fill_rx_status; + + channel_number = cfg80211_get_ies_channel_number(variable, ielen, + NL80211_BAND_2GHZ); + if (channel_number != -1) + channel = channel_number; + +fill_rx_status: + rtw_set_rx_freq_band(pkt_stat, channel); + rtw_set_rx_freq_by_pktstat(pkt_stat, rx_status); +} +EXPORT_SYMBOL(rtw_update_rx_freq_from_ie); + +static void rtw_rx_fill_rx_status(struct rtw_dev *rtwdev, + struct rtw_rx_pkt_stat *pkt_stat, + struct ieee80211_hdr *hdr, + struct ieee80211_rx_status *rx_status) +{ + struct ieee80211_hw *hw = rtwdev->hw; + u8 path; + + memset(rx_status, 0, sizeof(*rx_status)); + rx_status->freq = hw->conf.chandef.chan->center_freq; + rx_status->band = hw->conf.chandef.chan->band; + if (rtw_fw_feature_check(&rtwdev->fw, FW_FEATURE_SCAN_OFFLOAD) && + test_bit(RTW_FLAG_SCANNING, rtwdev->flags)) + rtw_set_rx_freq_by_pktstat(pkt_stat, rx_status); + if (pkt_stat->crc_err) + rx_status->flag |= RX_FLAG_FAILED_FCS_CRC; + if (pkt_stat->decrypted) + rx_status->flag |= RX_FLAG_DECRYPTED; + + if (pkt_stat->rate >= DESC_RATEVHT1SS_MCS0) + rx_status->encoding = RX_ENC_VHT; + else if (pkt_stat->rate >= DESC_RATEMCS0) + rx_status->encoding = RX_ENC_HT; + + if (rx_status->band == NL80211_BAND_5GHZ && + pkt_stat->rate >= DESC_RATE6M && + pkt_stat->rate <= DESC_RATE54M) { + rx_status->rate_idx = pkt_stat->rate - DESC_RATE6M; + } else if (rx_status->band == NL80211_BAND_2GHZ && + pkt_stat->rate >= DESC_RATE1M && + pkt_stat->rate <= DESC_RATE54M) { + rx_status->rate_idx = pkt_stat->rate - DESC_RATE1M; + } else if (pkt_stat->rate >= DESC_RATEMCS0) { + rtw_desc_to_mcsrate(pkt_stat->rate, &rx_status->rate_idx, + &rx_status->nss); + } + + rx_status->flag |= RX_FLAG_MACTIME_START; + rx_status->mactime = pkt_stat->tsf_low; + + if (pkt_stat->bw == RTW_CHANNEL_WIDTH_80) + rx_status->bw = RATE_INFO_BW_80; + else if (pkt_stat->bw == RTW_CHANNEL_WIDTH_40) + rx_status->bw = RATE_INFO_BW_40; + else + rx_status->bw = RATE_INFO_BW_20; + + if (pkt_stat->phy_status) { + rx_status->signal = pkt_stat->signal_power; + for (path = 0; path < rtwdev->hal.rf_path_num; path++) { + rx_status->chains |= BIT(path); + rx_status->chain_signal[path] = pkt_stat->rx_power[path]; + } + } else { + rx_status->flag |= RX_FLAG_NO_SIGNAL_VAL; + } + + rtw_rx_addr_match(rtwdev, pkt_stat, hdr); + + /* Rtl8723cs driver checks for size < 14 or size > 8192 and + * simply drops the packet. + */ + if (rtwdev->chip->id == RTW_CHIP_TYPE_8703B && pkt_stat->pkt_len == 0) { + rx_status->flag |= RX_FLAG_NO_PSDU; + rtw_dbg(rtwdev, RTW_DBG_RX, "zero length packet"); + } +} + +void rtw_rx_query_rx_desc(struct rtw_dev *rtwdev, void *rx_desc8, + struct rtw_rx_pkt_stat *pkt_stat, + struct ieee80211_rx_status *rx_status) +{ + u32 desc_sz = rtwdev->chip->rx_pkt_desc_sz; + struct rtw_rx_desc *rx_desc = rx_desc8; + struct ieee80211_hdr *hdr; + u32 enc_type, swdec; + void *phy_status; + + memset(pkt_stat, 0, sizeof(*pkt_stat)); + + pkt_stat->pkt_len = le32_get_bits(rx_desc->w0, RTW_RX_DESC_W0_PKT_LEN); + pkt_stat->crc_err = le32_get_bits(rx_desc->w0, RTW_RX_DESC_W0_CRC32); + pkt_stat->icv_err = le32_get_bits(rx_desc->w0, RTW_RX_DESC_W0_ICV_ERR); + pkt_stat->drv_info_sz = le32_get_bits(rx_desc->w0, + RTW_RX_DESC_W0_DRV_INFO_SIZE); + enc_type = le32_get_bits(rx_desc->w0, RTW_RX_DESC_W0_ENC_TYPE); + pkt_stat->shift = le32_get_bits(rx_desc->w0, RTW_RX_DESC_W0_SHIFT); + pkt_stat->phy_status = le32_get_bits(rx_desc->w0, RTW_RX_DESC_W0_PHYST); + swdec = le32_get_bits(rx_desc->w0, RTW_RX_DESC_W0_SWDEC); + pkt_stat->decrypted = !swdec && enc_type != RX_DESC_ENC_NONE; + + pkt_stat->cam_id = le32_get_bits(rx_desc->w1, RTW_RX_DESC_W1_MACID); + + pkt_stat->is_c2h = le32_get_bits(rx_desc->w2, RTW_RX_DESC_W2_C2H); + pkt_stat->ppdu_cnt = le32_get_bits(rx_desc->w2, RTW_RX_DESC_W2_PPDU_CNT); + + pkt_stat->rate = le32_get_bits(rx_desc->w3, RTW_RX_DESC_W3_RX_RATE); + + pkt_stat->bw = le32_get_bits(rx_desc->w4, RTW_RX_DESC_W4_BW); + + pkt_stat->tsf_low = le32_get_bits(rx_desc->w5, RTW_RX_DESC_W5_TSFL); + + /* drv_info_sz is in unit of 8-bytes */ + pkt_stat->drv_info_sz *= 8; + + /* c2h cmd pkt's rx/phy status is not interested */ + if (pkt_stat->is_c2h) + return; + + phy_status = rx_desc8 + desc_sz + pkt_stat->shift; + hdr = phy_status + pkt_stat->drv_info_sz; + pkt_stat->hdr = hdr; + + if (pkt_stat->phy_status) + rtwdev->chip->ops->query_phy_status(rtwdev, phy_status, pkt_stat); + + rtw_rx_fill_rx_status(rtwdev, pkt_stat, hdr, rx_status); +} +EXPORT_SYMBOL(rtw_rx_query_rx_desc); |