1
2
3
4#include "wifi.h"
5#include "base.h"
6#include "rc.h"
7
8
9
10
11
12
13
14
15static u8 _rtl_rc_get_highest_rix(struct rtl_priv *rtlpriv,
16 struct ieee80211_sta *sta,
17 struct sk_buff *skb, bool not_data)
18{
19 struct rtl_hal *rtlhal = rtl_hal(rtlpriv);
20 struct rtl_phy *rtlphy = &(rtlpriv->phy);
21 struct rtl_sta_info *sta_entry = NULL;
22 u16 wireless_mode = 0;
23 u8 nss;
24 struct ieee80211_tx_rate rate;
25
26 switch (get_rf_type(rtlphy)) {
27 case RF_4T4R:
28 nss = 4;
29 break;
30 case RF_3T3R:
31 nss = 3;
32 break;
33 case RF_2T2R:
34 nss = 2;
35 break;
36 default:
37 nss = 1;
38 break;
39 }
40
41
42
43
44
45
46
47
48
49 if (sta) {
50 sta_entry = (struct rtl_sta_info *)sta->drv_priv;
51 wireless_mode = sta_entry->wireless_mode;
52 }
53
54 if (rtl_is_special_data(rtlpriv->mac80211.hw, skb, true, false) ||
55 not_data) {
56 return 0;
57 } else {
58 if (rtlhal->current_bandtype == BAND_ON_2_4G) {
59 if (wireless_mode == WIRELESS_MODE_B) {
60 return B_MODE_MAX_RIX;
61 } else if (wireless_mode == WIRELESS_MODE_G) {
62 return G_MODE_MAX_RIX;
63 } else if (wireless_mode == WIRELESS_MODE_N_24G) {
64 if (nss == 1)
65 return N_MODE_MCS7_RIX;
66 else
67 return N_MODE_MCS15_RIX;
68 } else if (wireless_mode == WIRELESS_MODE_AC_24G) {
69 if (sta->bandwidth == IEEE80211_STA_RX_BW_20) {
70 ieee80211_rate_set_vht(&rate,
71 AC_MODE_MCS8_RIX,
72 nss);
73 goto out;
74 } else {
75 ieee80211_rate_set_vht(&rate,
76 AC_MODE_MCS9_RIX,
77 nss);
78 goto out;
79 }
80 }
81 return 0;
82 } else {
83 if (wireless_mode == WIRELESS_MODE_A) {
84 return A_MODE_MAX_RIX;
85 } else if (wireless_mode == WIRELESS_MODE_N_5G) {
86 if (nss == 1)
87 return N_MODE_MCS7_RIX;
88 else
89 return N_MODE_MCS15_RIX;
90 } else if (wireless_mode == WIRELESS_MODE_AC_5G) {
91 if (sta->bandwidth == IEEE80211_STA_RX_BW_20) {
92 ieee80211_rate_set_vht(&rate,
93 AC_MODE_MCS8_RIX,
94 nss);
95 goto out;
96 } else {
97 ieee80211_rate_set_vht(&rate,
98 AC_MODE_MCS9_RIX,
99 nss);
100 goto out;
101 }
102 }
103 return 0;
104 }
105 }
106
107out:
108 return rate.idx;
109}
110
111static void _rtl_rc_rate_set_series(struct rtl_priv *rtlpriv,
112 struct ieee80211_sta *sta,
113 struct ieee80211_tx_rate *rate,
114 struct ieee80211_tx_rate_control *txrc,
115 u8 tries, s8 rix, int rtsctsenable,
116 bool not_data)
117{
118 struct rtl_mac *mac = rtl_mac(rtlpriv);
119 struct rtl_sta_info *sta_entry = NULL;
120 u16 wireless_mode = 0;
121 u8 sgi_20 = 0, sgi_40 = 0, sgi_80 = 0;
122
123 if (sta) {
124 sgi_20 = sta->ht_cap.cap & IEEE80211_HT_CAP_SGI_20;
125 sgi_40 = sta->ht_cap.cap & IEEE80211_HT_CAP_SGI_40;
126 sgi_80 = sta->vht_cap.cap & IEEE80211_VHT_CAP_SHORT_GI_80;
127 sta_entry = (struct rtl_sta_info *)sta->drv_priv;
128 wireless_mode = sta_entry->wireless_mode;
129 }
130 rate->count = tries;
131 rate->idx = rix >= 0x00 ? rix : 0x00;
132
133 if (!not_data) {
134 if (txrc->short_preamble)
135 rate->flags |= IEEE80211_TX_RC_USE_SHORT_PREAMBLE;
136 if (mac->opmode == NL80211_IFTYPE_AP ||
137 mac->opmode == NL80211_IFTYPE_ADHOC) {
138 if (sta && (sta->ht_cap.cap &
139 IEEE80211_HT_CAP_SUP_WIDTH_20_40))
140 rate->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
141 if (sta && sta->vht_cap.vht_supported)
142 rate->flags |= IEEE80211_TX_RC_80_MHZ_WIDTH;
143 } else {
144 if (mac->bw_80)
145 rate->flags |= IEEE80211_TX_RC_80_MHZ_WIDTH;
146 else if (mac->bw_40)
147 rate->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
148 }
149
150 if (sgi_20 || sgi_40 || sgi_80)
151 rate->flags |= IEEE80211_TX_RC_SHORT_GI;
152 if (sta && sta->ht_cap.ht_supported &&
153 (wireless_mode == WIRELESS_MODE_N_5G ||
154 wireless_mode == WIRELESS_MODE_N_24G))
155 rate->flags |= IEEE80211_TX_RC_MCS;
156 if (sta && sta->vht_cap.vht_supported &&
157 (wireless_mode == WIRELESS_MODE_AC_5G ||
158 wireless_mode == WIRELESS_MODE_AC_24G ||
159 wireless_mode == WIRELESS_MODE_AC_ONLY))
160 rate->flags |= IEEE80211_TX_RC_VHT_MCS;
161 }
162}
163
164static void rtl_get_rate(void *ppriv, struct ieee80211_sta *sta,
165 void *priv_sta,
166 struct ieee80211_tx_rate_control *txrc)
167{
168 struct rtl_priv *rtlpriv = ppriv;
169 struct sk_buff *skb = txrc->skb;
170 struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
171 struct ieee80211_tx_rate *rates = tx_info->control.rates;
172 __le16 fc = rtl_get_fc(skb);
173 u8 try_per_rate, i, rix;
174 bool not_data = !ieee80211_is_data(fc);
175
176 if (rate_control_send_low(sta, priv_sta, txrc))
177 return;
178
179 rix = _rtl_rc_get_highest_rix(rtlpriv, sta, skb, not_data);
180 try_per_rate = 1;
181 _rtl_rc_rate_set_series(rtlpriv, sta, &rates[0], txrc,
182 try_per_rate, rix, 1, not_data);
183
184 if (!not_data) {
185 for (i = 1; i < 4; i++)
186 _rtl_rc_rate_set_series(rtlpriv, sta, &rates[i],
187 txrc, i, (rix - i), 1,
188 not_data);
189 }
190}
191
192static bool _rtl_tx_aggr_check(struct rtl_priv *rtlpriv,
193 struct rtl_sta_info *sta_entry, u16 tid)
194{
195 struct rtl_mac *mac = rtl_mac(rtlpriv);
196
197 if (mac->act_scanning)
198 return false;
199
200 if (mac->opmode == NL80211_IFTYPE_STATION &&
201 mac->cnt_after_linked < 3)
202 return false;
203
204 if (sta_entry->tids[tid].agg.agg_state == RTL_AGG_STOP)
205 return true;
206
207 return false;
208}
209
210
211static void rtl_tx_status(void *ppriv,
212 struct ieee80211_supported_band *sband,
213 struct ieee80211_sta *sta, void *priv_sta,
214 struct sk_buff *skb)
215{
216 struct rtl_priv *rtlpriv = ppriv;
217 struct rtl_mac *mac = rtl_mac(rtlpriv);
218 struct ieee80211_hdr *hdr = rtl_get_hdr(skb);
219 __le16 fc = rtl_get_fc(skb);
220 struct rtl_sta_info *sta_entry;
221
222 if (!priv_sta || !ieee80211_is_data(fc))
223 return;
224
225 if (rtl_is_special_data(mac->hw, skb, true, true))
226 return;
227
228 if (is_multicast_ether_addr(ieee80211_get_DA(hdr)) ||
229 is_broadcast_ether_addr(ieee80211_get_DA(hdr)))
230 return;
231
232 if (sta) {
233
234 sta_entry = (struct rtl_sta_info *)sta->drv_priv;
235 if (sta->ht_cap.ht_supported &&
236 !(skb->protocol == cpu_to_be16(ETH_P_PAE))) {
237 if (ieee80211_is_data_qos(fc)) {
238 u8 tid = rtl_get_tid(skb);
239
240 if (_rtl_tx_aggr_check(rtlpriv, sta_entry,
241 tid)) {
242 sta_entry->tids[tid].agg.agg_state =
243 RTL_AGG_PROGRESS;
244 ieee80211_start_tx_ba_session(sta, tid,
245 5000);
246 }
247 }
248 }
249 }
250}
251
252static void rtl_rate_init(void *ppriv,
253 struct ieee80211_supported_band *sband,
254 struct cfg80211_chan_def *chandef,
255 struct ieee80211_sta *sta, void *priv_sta)
256{
257}
258
259static void rtl_rate_update(void *ppriv,
260 struct ieee80211_supported_band *sband,
261 struct cfg80211_chan_def *chandef,
262 struct ieee80211_sta *sta, void *priv_sta,
263 u32 changed)
264{
265}
266
267static void *rtl_rate_alloc(struct ieee80211_hw *hw, struct dentry *debugfsdir)
268{
269 struct rtl_priv *rtlpriv = rtl_priv(hw);
270 return rtlpriv;
271}
272
273static void rtl_rate_free(void *rtlpriv)
274{
275 return;
276}
277
278static void *rtl_rate_alloc_sta(void *ppriv,
279 struct ieee80211_sta *sta, gfp_t gfp)
280{
281 struct rtl_priv *rtlpriv = ppriv;
282 struct rtl_rate_priv *rate_priv;
283
284 rate_priv = kzalloc(sizeof(*rate_priv), gfp);
285 if (!rate_priv)
286 return NULL;
287
288 rtlpriv->rate_priv = rate_priv;
289
290 return rate_priv;
291}
292
293static void rtl_rate_free_sta(void *rtlpriv,
294 struct ieee80211_sta *sta, void *priv_sta)
295{
296 struct rtl_rate_priv *rate_priv = priv_sta;
297
298 kfree(rate_priv);
299}
300
301static const struct rate_control_ops rtl_rate_ops = {
302 .name = "rtl_rc",
303 .alloc = rtl_rate_alloc,
304 .free = rtl_rate_free,
305 .alloc_sta = rtl_rate_alloc_sta,
306 .free_sta = rtl_rate_free_sta,
307 .rate_init = rtl_rate_init,
308 .rate_update = rtl_rate_update,
309 .tx_status = rtl_tx_status,
310 .get_rate = rtl_get_rate,
311};
312
313int rtl_rate_control_register(void)
314{
315 return ieee80211_rate_control_register(&rtl_rate_ops);
316}
317
318void rtl_rate_control_unregister(void)
319{
320 ieee80211_rate_control_unregister(&rtl_rate_ops);
321}
322
