summaryrefslogtreecommitdiff
path: root/package/mac80211/patches/552-ath9k_txdesc_optimization.patch
blob: 75d9f653d969ef45bc4d124ca2b5134e031242e0 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
--- a/drivers/net/wireless/ath/ath9k/ar9002_mac.c
+++ b/drivers/net/wireless/ath/ath9k/ar9002_mac.c
@@ -208,77 +208,68 @@ static int ar9002_hw_proc_txdesc(struct 
 				 struct ath_tx_status *ts)
 {
 	struct ar5416_desc *ads = AR5416DESC(ds);
+	u32 status;
 
-	if ((ads->ds_txstatus9 & AR_TxDone) == 0)
+	status = ACCESS_ONCE(ads->ds_txstatus9);
+	if ((status & AR_TxDone) == 0)
 		return -EINPROGRESS;
 
-	ts->ts_seqnum = MS(ads->ds_txstatus9, AR_SeqNum);
 	ts->ts_tstamp = ads->AR_SendTimestamp;
 	ts->ts_status = 0;
 	ts->ts_flags = 0;
 
-	if (ads->ds_txstatus1 & AR_FrmXmitOK)
+	if (status & AR_TxOpExceeded)
+		ts->ts_status |= ATH9K_TXERR_XTXOP;
+	ts->tid = MS(status, AR_TxTid);
+	ts->ts_rateindex = MS(status, AR_FinalTxIdx);
+	ts->ts_seqnum = MS(status, AR_SeqNum);
+
+	status = ACCESS_ONCE(ads->ds_txstatus0);
+	ts->ts_rssi_ctl0 = MS(status, AR_TxRSSIAnt00);
+	ts->ts_rssi_ctl1 = MS(status, AR_TxRSSIAnt01);
+	ts->ts_rssi_ctl2 = MS(status, AR_TxRSSIAnt02);
+	if (status & AR_TxBaStatus) {
+		ts->ts_flags |= ATH9K_TX_BA;
+		ts->ba_low = ads->AR_BaBitmapLow;
+		ts->ba_high = ads->AR_BaBitmapHigh;
+	}
+
+	status = ACCESS_ONCE(ads->ds_txstatus1);
+	if (status & AR_FrmXmitOK)
 		ts->ts_status |= ATH9K_TX_ACKED;
-	if (ads->ds_txstatus1 & AR_ExcessiveRetries)
+	if (status & AR_ExcessiveRetries)
 		ts->ts_status |= ATH9K_TXERR_XRETRY;
-	if (ads->ds_txstatus1 & AR_Filtered)
+	if (status & AR_Filtered)
 		ts->ts_status |= ATH9K_TXERR_FILT;
-	if (ads->ds_txstatus1 & AR_FIFOUnderrun) {
+	if (status & AR_FIFOUnderrun) {
 		ts->ts_status |= ATH9K_TXERR_FIFO;
 		ath9k_hw_updatetxtriglevel(ah, true);
 	}
-	if (ads->ds_txstatus9 & AR_TxOpExceeded)
-		ts->ts_status |= ATH9K_TXERR_XTXOP;
-	if (ads->ds_txstatus1 & AR_TxTimerExpired)
+	if (status & AR_TxTimerExpired)
 		ts->ts_status |= ATH9K_TXERR_TIMER_EXPIRED;
-
-	if (ads->ds_txstatus1 & AR_DescCfgErr)
+	if (status & AR_DescCfgErr)
 		ts->ts_flags |= ATH9K_TX_DESC_CFG_ERR;
-	if (ads->ds_txstatus1 & AR_TxDataUnderrun) {
+	if (status & AR_TxDataUnderrun) {
 		ts->ts_flags |= ATH9K_TX_DATA_UNDERRUN;
 		ath9k_hw_updatetxtriglevel(ah, true);
 	}
-	if (ads->ds_txstatus1 & AR_TxDelimUnderrun) {
+	if (status & AR_TxDelimUnderrun) {
 		ts->ts_flags |= ATH9K_TX_DELIM_UNDERRUN;
 		ath9k_hw_updatetxtriglevel(ah, true);
 	}
-	if (ads->ds_txstatus0 & AR_TxBaStatus) {
-		ts->ts_flags |= ATH9K_TX_BA;
-		ts->ba_low = ads->AR_BaBitmapLow;
-		ts->ba_high = ads->AR_BaBitmapHigh;
-	}
-
-	ts->ts_rateindex = MS(ads->ds_txstatus9, AR_FinalTxIdx);
-	switch (ts->ts_rateindex) {
-	case 0:
-		ts->ts_ratecode = MS(ads->ds_ctl3, AR_XmitRate0);
-		break;
-	case 1:
-		ts->ts_ratecode = MS(ads->ds_ctl3, AR_XmitRate1);
-		break;
-	case 2:
-		ts->ts_ratecode = MS(ads->ds_ctl3, AR_XmitRate2);
-		break;
-	case 3:
-		ts->ts_ratecode = MS(ads->ds_ctl3, AR_XmitRate3);
-		break;
-	}
+	ts->ts_shortretry = MS(status, AR_RTSFailCnt);
+	ts->ts_longretry = MS(status, AR_DataFailCnt);
+	ts->ts_virtcol = MS(status, AR_VirtRetryCnt);
+
+	status = ACCESS_ONCE(ads->ds_txstatus5);
+	ts->ts_rssi = MS(status, AR_TxRSSICombined);
+	ts->ts_rssi_ext0 = MS(status, AR_TxRSSIAnt10);
+	ts->ts_rssi_ext1 = MS(status, AR_TxRSSIAnt11);
+	ts->ts_rssi_ext2 = MS(status, AR_TxRSSIAnt12);
 
-	ts->ts_rssi = MS(ads->ds_txstatus5, AR_TxRSSICombined);
-	ts->ts_rssi_ctl0 = MS(ads->ds_txstatus0, AR_TxRSSIAnt00);
-	ts->ts_rssi_ctl1 = MS(ads->ds_txstatus0, AR_TxRSSIAnt01);
-	ts->ts_rssi_ctl2 = MS(ads->ds_txstatus0, AR_TxRSSIAnt02);
-	ts->ts_rssi_ext0 = MS(ads->ds_txstatus5, AR_TxRSSIAnt10);
-	ts->ts_rssi_ext1 = MS(ads->ds_txstatus5, AR_TxRSSIAnt11);
-	ts->ts_rssi_ext2 = MS(ads->ds_txstatus5, AR_TxRSSIAnt12);
 	ts->evm0 = ads->AR_TxEVM0;
 	ts->evm1 = ads->AR_TxEVM1;
 	ts->evm2 = ads->AR_TxEVM2;
-	ts->ts_shortretry = MS(ads->ds_txstatus1, AR_RTSFailCnt);
-	ts->ts_longretry = MS(ads->ds_txstatus1, AR_DataFailCnt);
-	ts->ts_virtcol = MS(ads->ds_txstatus1, AR_VirtRetryCnt);
-	ts->tid = MS(ads->ds_txstatus9, AR_TxTid);
-	ts->ts_antenna = 0;
 
 	return 0;
 }
--- a/drivers/net/wireless/ath/ath9k/mac.h
+++ b/drivers/net/wireless/ath/ath9k/mac.h
@@ -104,13 +104,11 @@ struct ath_tx_status {
 	u32 ts_tstamp;
 	u16 ts_seqnum;
 	u8 ts_status;
-	u8 ts_ratecode;
 	u8 ts_rateindex;
 	int8_t ts_rssi;
 	u8 ts_shortretry;
 	u8 ts_longretry;
 	u8 ts_virtcol;
-	u8 ts_antenna;
 	u8 ts_flags;
 	int8_t ts_rssi_ctl0;
 	int8_t ts_rssi_ctl1;
@@ -121,7 +119,6 @@ struct ath_tx_status {
 	u8 qid;
 	u16 desc_id;
 	u8 tid;
-	u8 pad[2];
 	u32 ba_low;
 	u32 ba_high;
 	u32 evm0;
--- a/drivers/net/wireless/ath/ath9k/ar9003_mac.c
+++ b/drivers/net/wireless/ath/ath9k/ar9003_mac.c
@@ -237,10 +237,12 @@ static int ar9003_hw_proc_txdesc(struct 
 				 struct ath_tx_status *ts)
 {
 	struct ar9003_txs *ads;
+	u32 status;
 
 	ads = &ah->ts_ring[ah->ts_tail];
 
-	if ((ads->status8 & AR_TxDone) == 0)
+	status = ACCESS_ONCE(ads->status8);
+	if ((status & AR_TxDone) == 0)
 		return -EINPROGRESS;
 
 	ah->ts_tail = (ah->ts_tail + 1) % ah->ts_size;
@@ -253,57 +255,58 @@ static int ar9003_hw_proc_txdesc(struct 
 		return -EIO;
 	}
 
+	if (status & AR_TxOpExceeded)
+		ts->ts_status |= ATH9K_TXERR_XTXOP;
+	ts->ts_rateindex = MS(status, AR_FinalTxIdx);
+	ts->ts_seqnum = MS(status, AR_SeqNum);
+	ts->tid = MS(status, AR_TxTid);
+
 	ts->qid = MS(ads->ds_info, AR_TxQcuNum);
 	ts->desc_id = MS(ads->status1, AR_TxDescId);
-	ts->ts_seqnum = MS(ads->status8, AR_SeqNum);
 	ts->ts_tstamp = ads->status4;
 	ts->ts_status = 0;
 	ts->ts_flags  = 0;
 
-	if (ads->status3 & AR_ExcessiveRetries)
+	status = ACCESS_ONCE(ads->status2);
+	ts->ts_rssi_ctl0 = MS(status, AR_TxRSSIAnt00);
+	ts->ts_rssi_ctl1 = MS(status, AR_TxRSSIAnt01);
+	ts->ts_rssi_ctl2 = MS(status, AR_TxRSSIAnt02);
+	if (status & AR_TxBaStatus) {
+		ts->ts_flags |= ATH9K_TX_BA;
+		ts->ba_low = ads->status5;
+		ts->ba_high = ads->status6;
+	}
+
+	status = ACCESS_ONCE(ads->status3);
+	if (status & AR_ExcessiveRetries)
 		ts->ts_status |= ATH9K_TXERR_XRETRY;
-	if (ads->status3 & AR_Filtered)
+	if (status & AR_Filtered)
 		ts->ts_status |= ATH9K_TXERR_FILT;
-	if (ads->status3 & AR_FIFOUnderrun) {
+	if (status & AR_FIFOUnderrun) {
 		ts->ts_status |= ATH9K_TXERR_FIFO;
 		ath9k_hw_updatetxtriglevel(ah, true);
 	}
-	if (ads->status8 & AR_TxOpExceeded)
-		ts->ts_status |= ATH9K_TXERR_XTXOP;
-	if (ads->status3 & AR_TxTimerExpired)
+	if (status & AR_TxTimerExpired)
 		ts->ts_status |= ATH9K_TXERR_TIMER_EXPIRED;
-
-	if (ads->status3 & AR_DescCfgErr)
+	if (status & AR_DescCfgErr)
 		ts->ts_flags |= ATH9K_TX_DESC_CFG_ERR;
-	if (ads->status3 & AR_TxDataUnderrun) {
+	if (status & AR_TxDataUnderrun) {
 		ts->ts_flags |= ATH9K_TX_DATA_UNDERRUN;
 		ath9k_hw_updatetxtriglevel(ah, true);
 	}
-	if (ads->status3 & AR_TxDelimUnderrun) {
+	if (status & AR_TxDelimUnderrun) {
 		ts->ts_flags |= ATH9K_TX_DELIM_UNDERRUN;
 		ath9k_hw_updatetxtriglevel(ah, true);
 	}
-	if (ads->status2 & AR_TxBaStatus) {
-		ts->ts_flags |= ATH9K_TX_BA;
-		ts->ba_low = ads->status5;
-		ts->ba_high = ads->status6;
-	}
-
-	ts->ts_rateindex = MS(ads->status8, AR_FinalTxIdx);
-
-	ts->ts_rssi = MS(ads->status7, AR_TxRSSICombined);
-	ts->ts_rssi_ctl0 = MS(ads->status2, AR_TxRSSIAnt00);
-	ts->ts_rssi_ctl1 = MS(ads->status2, AR_TxRSSIAnt01);
-	ts->ts_rssi_ctl2 = MS(ads->status2, AR_TxRSSIAnt02);
-	ts->ts_rssi_ext0 = MS(ads->status7, AR_TxRSSIAnt10);
-	ts->ts_rssi_ext1 = MS(ads->status7, AR_TxRSSIAnt11);
-	ts->ts_rssi_ext2 = MS(ads->status7, AR_TxRSSIAnt12);
-	ts->ts_shortretry = MS(ads->status3, AR_RTSFailCnt);
-	ts->ts_longretry = MS(ads->status3, AR_DataFailCnt);
-	ts->ts_virtcol = MS(ads->status3, AR_VirtRetryCnt);
-	ts->ts_antenna = 0;
-
-	ts->tid = MS(ads->status8, AR_TxTid);
+	ts->ts_shortretry = MS(status, AR_RTSFailCnt);
+	ts->ts_longretry = MS(status, AR_DataFailCnt);
+	ts->ts_virtcol = MS(status, AR_VirtRetryCnt);
+
+	status = ACCESS_ONCE(ads->status7);
+	ts->ts_rssi = MS(status, AR_TxRSSICombined);
+	ts->ts_rssi_ext0 = MS(status, AR_TxRSSIAnt10);
+	ts->ts_rssi_ext1 = MS(status, AR_TxRSSIAnt11);
+	ts->ts_rssi_ext2 = MS(status, AR_TxRSSIAnt12);
 
 	memset(ads, 0, sizeof(*ads));