xref: /linux/drivers/net/wireless/realtek/rtw88/rx.c (revision 9a6b55ac)
1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
2 /* Copyright(c) 2018-2019  Realtek Corporation
3  */
4 
5 #include "main.h"
6 #include "rx.h"
7 #include "ps.h"
8 #include "debug.h"
9 
10 void rtw_rx_stats(struct rtw_dev *rtwdev, struct ieee80211_vif *vif,
11 		  struct sk_buff *skb)
12 {
13 	struct ieee80211_hdr *hdr;
14 	struct rtw_vif *rtwvif;
15 
16 	hdr = (struct ieee80211_hdr *)skb->data;
17 
18 	if (!ieee80211_is_data(hdr->frame_control))
19 		return;
20 
21 	if (!is_broadcast_ether_addr(hdr->addr1) &&
22 	    !is_multicast_ether_addr(hdr->addr1)) {
23 		rtwdev->stats.rx_unicast += skb->len;
24 		rtwdev->stats.rx_cnt++;
25 		if (vif) {
26 			rtwvif = (struct rtw_vif *)vif->drv_priv;
27 			rtwvif->stats.rx_unicast += skb->len;
28 			rtwvif->stats.rx_cnt++;
29 		}
30 	}
31 }
32 EXPORT_SYMBOL(rtw_rx_stats);
33 
34 struct rtw_rx_addr_match_data {
35 	struct rtw_dev *rtwdev;
36 	struct ieee80211_hdr *hdr;
37 	struct rtw_rx_pkt_stat *pkt_stat;
38 	u8 *bssid;
39 };
40 
41 static void rtw_rx_phy_stat(struct rtw_dev *rtwdev,
42 			    struct rtw_rx_pkt_stat *pkt_stat,
43 			    struct ieee80211_hdr *hdr)
44 {
45 	struct rtw_dm_info *dm_info = &rtwdev->dm_info;
46 	struct rtw_pkt_count *cur_pkt_cnt = &dm_info->cur_pkt_count;
47 	u8 rate_ss, rate_ss_evm, evm_id;
48 	u8 i, idx;
49 
50 	dm_info->curr_rx_rate = pkt_stat->rate;
51 
52 	if (ieee80211_is_beacon(hdr->frame_control))
53 		cur_pkt_cnt->num_bcn_pkt++;
54 
55 	switch (pkt_stat->rate) {
56 	case DESC_RATE1M...DESC_RATE11M:
57 		goto pkt_num;
58 	case DESC_RATE6M...DESC_RATE54M:
59 		rate_ss = 0;
60 		rate_ss_evm = 1;
61 		evm_id = RTW_EVM_OFDM;
62 		break;
63 	case DESC_RATEMCS0...DESC_RATEMCS7:
64 	case DESC_RATEVHT1SS_MCS0...DESC_RATEVHT1SS_MCS9:
65 		rate_ss = 1;
66 		rate_ss_evm = 1;
67 		evm_id = RTW_EVM_1SS;
68 		break;
69 	case DESC_RATEMCS8...DESC_RATEMCS15:
70 	case DESC_RATEVHT2SS_MCS0...DESC_RATEVHT2SS_MCS9:
71 		rate_ss = 2;
72 		rate_ss_evm = 2;
73 		evm_id = RTW_EVM_2SS_A;
74 		break;
75 	default:
76 		rtw_warn(rtwdev, "unknown pkt rate = %d\n", pkt_stat->rate);
77 		return;
78 	}
79 
80 	for (i = 0; i < rate_ss_evm; i++) {
81 		idx = evm_id + i;
82 		ewma_evm_add(&dm_info->ewma_evm[idx],
83 			     dm_info->rx_evm_dbm[i]);
84 	}
85 
86 	for (i = 0; i < rtwdev->hal.rf_path_num; i++) {
87 		idx = RTW_SNR_OFDM_A + 4 * rate_ss + i;
88 		ewma_snr_add(&dm_info->ewma_snr[idx],
89 			     dm_info->rx_snr[i]);
90 	}
91 pkt_num:
92 	cur_pkt_cnt->num_qry_pkt[pkt_stat->rate]++;
93 }
94 
95 static void rtw_rx_addr_match_iter(void *data, u8 *mac,
96 				   struct ieee80211_vif *vif)
97 {
98 	struct rtw_rx_addr_match_data *iter_data = data;
99 	struct ieee80211_sta *sta;
100 	struct ieee80211_hdr *hdr = iter_data->hdr;
101 	struct rtw_dev *rtwdev = iter_data->rtwdev;
102 	struct rtw_sta_info *si;
103 	struct rtw_rx_pkt_stat *pkt_stat = iter_data->pkt_stat;
104 	u8 *bssid = iter_data->bssid;
105 
106 	if (!ether_addr_equal(vif->bss_conf.bssid, bssid))
107 		return;
108 
109 	if (!(ether_addr_equal(vif->addr, hdr->addr1) ||
110 	      ieee80211_is_beacon(hdr->frame_control)))
111 		return;
112 
113 	rtw_rx_phy_stat(rtwdev, pkt_stat, hdr);
114 	sta = ieee80211_find_sta_by_ifaddr(rtwdev->hw, hdr->addr2,
115 					   vif->addr);
116 	if (!sta)
117 		return;
118 
119 	si = (struct rtw_sta_info *)sta->drv_priv;
120 	ewma_rssi_add(&si->avg_rssi, pkt_stat->rssi);
121 }
122 
123 static void rtw_rx_addr_match(struct rtw_dev *rtwdev,
124 			      struct rtw_rx_pkt_stat *pkt_stat,
125 			      struct ieee80211_hdr *hdr)
126 {
127 	struct rtw_rx_addr_match_data data = {};
128 
129 	if (pkt_stat->crc_err || pkt_stat->icv_err || !pkt_stat->phy_status ||
130 	    ieee80211_is_ctl(hdr->frame_control))
131 		return;
132 
133 	data.rtwdev = rtwdev;
134 	data.hdr = hdr;
135 	data.pkt_stat = pkt_stat;
136 	data.bssid = get_hdr_bssid(hdr);
137 
138 	rtw_iterate_vifs_atomic(rtwdev, rtw_rx_addr_match_iter, &data);
139 }
140 
141 void rtw_rx_fill_rx_status(struct rtw_dev *rtwdev,
142 			   struct rtw_rx_pkt_stat *pkt_stat,
143 			   struct ieee80211_hdr *hdr,
144 			   struct ieee80211_rx_status *rx_status,
145 			   u8 *phy_status)
146 {
147 	struct ieee80211_hw *hw = rtwdev->hw;
148 	u8 path;
149 
150 	memset(rx_status, 0, sizeof(*rx_status));
151 	rx_status->freq = hw->conf.chandef.chan->center_freq;
152 	rx_status->band = hw->conf.chandef.chan->band;
153 	if (pkt_stat->crc_err)
154 		rx_status->flag |= RX_FLAG_FAILED_FCS_CRC;
155 	if (pkt_stat->decrypted)
156 		rx_status->flag |= RX_FLAG_DECRYPTED;
157 
158 	if (pkt_stat->rate >= DESC_RATEVHT1SS_MCS0)
159 		rx_status->encoding = RX_ENC_VHT;
160 	else if (pkt_stat->rate >= DESC_RATEMCS0)
161 		rx_status->encoding = RX_ENC_HT;
162 
163 	if (rx_status->band == NL80211_BAND_5GHZ &&
164 	    pkt_stat->rate >= DESC_RATE6M &&
165 	    pkt_stat->rate <= DESC_RATE54M) {
166 		rx_status->rate_idx = pkt_stat->rate - DESC_RATE6M;
167 	} else if (rx_status->band == NL80211_BAND_2GHZ &&
168 		   pkt_stat->rate >= DESC_RATE1M &&
169 		   pkt_stat->rate <= DESC_RATE54M) {
170 		rx_status->rate_idx = pkt_stat->rate - DESC_RATE1M;
171 	} else if (pkt_stat->rate >= DESC_RATEMCS0) {
172 		rtw_desc_to_mcsrate(pkt_stat->rate, &rx_status->rate_idx,
173 				    &rx_status->nss);
174 	}
175 
176 	rx_status->flag |= RX_FLAG_MACTIME_START;
177 	rx_status->mactime = pkt_stat->tsf_low;
178 
179 	if (pkt_stat->bw == RTW_CHANNEL_WIDTH_80)
180 		rx_status->bw = RATE_INFO_BW_80;
181 	else if (pkt_stat->bw == RTW_CHANNEL_WIDTH_40)
182 		rx_status->bw = RATE_INFO_BW_40;
183 	else
184 		rx_status->bw = RATE_INFO_BW_20;
185 
186 	rx_status->signal = pkt_stat->signal_power;
187 	for (path = 0; path < rtwdev->hal.rf_path_num; path++) {
188 		rx_status->chains |= BIT(path);
189 		rx_status->chain_signal[path] = pkt_stat->rx_power[path];
190 	}
191 
192 	rtw_rx_addr_match(rtwdev, pkt_stat, hdr);
193 }
194