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openwrt/package/mac80211/patches/250-ath5k_mrr.patch

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Clean up the tx status reporting, fix retry counters (short retries are
virtual collisions, not actual retries). Implement multi-rate retry
support.
This also fixes strong throughput fluctuations with rc80211_pid
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
--- a/drivers/net/wireless/ath5k/base.c
+++ b/drivers/net/wireless/ath5k/base.c
@@ -530,6 +530,12 @@
goto err_irq;
}
+ /* set up multi-rate retry capabilities */
+ if (sc->ah->ah_version == AR5K_AR5212) {
+ hw->max_altrates = 3;
+ hw->max_altrate_tries = 11;
+ }
+
/* Finish private driver data initialization */
ret = ath5k_attach(pdev, hw);
if (ret)
@@ -1149,7 +1155,9 @@
struct sk_buff *skb = bf->skb;
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
unsigned int pktlen, flags, keyidx = AR5K_TXKEYIX_INVALID;
- int ret;
+ struct ieee80211_rate *rate;
+ unsigned int mrr_rate[3], mrr_tries[3];
+ int i, ret;
flags = AR5K_TXDESC_INTREQ | AR5K_TXDESC_CLRDMASK;
@@ -1174,6 +1182,22 @@
if (ret)
goto err_unmap;
+ memset(mrr_rate, 0, sizeof(mrr_rate));
+ memset(mrr_tries, 0, sizeof(mrr_tries));
+ for (i = 0; i < 3; i++) {
+ rate = ieee80211_get_alt_retry_rate(sc->hw, info, i);
+ if (!rate)
+ break;
+
+ mrr_rate[i] = rate->hw_value;
+ mrr_tries[i] = info->control.retries[i].limit;
+ }
+
+ ah->ah_setup_mrr_tx_desc(ah, ds,
+ mrr_rate[0], mrr_tries[0],
+ mrr_rate[1], mrr_tries[1],
+ mrr_rate[2], mrr_tries[2]);
+
ds->ds_link = 0;
ds->ds_data = bf->skbaddr;
@@ -1790,7 +1814,7 @@
struct ath5k_desc *ds;
struct sk_buff *skb;
struct ieee80211_tx_info *info;
- int ret;
+ int i, ret;
spin_lock(&txq->lock);
list_for_each_entry_safe(bf, bf0, &txq->q, list) {
@@ -1812,7 +1836,25 @@
pci_unmap_single(sc->pdev, bf->skbaddr, skb->len,
PCI_DMA_TODEVICE);
- info->status.retry_count = ts.ts_shortretry + ts.ts_longretry / 6;
+ memset(&info->status, 0, sizeof(info->status));
+ info->tx_rate_idx = ath5k_hw_to_driver_rix(sc,
+ ts.ts_rate[ts.ts_final_idx]);
+ info->status.retry_count = ts.ts_longretry;
+
+ for (i = 0; i < 4; i++) {
+ struct ieee80211_tx_altrate *r =
+ &info->status.retries[i];
+
+ if (ts.ts_rate[i]) {
+ r->rate_idx = ath5k_hw_to_driver_rix(sc, ts.ts_rate[i]);
+ r->limit = ts.ts_retry[i];
+ } else {
+ r->rate_idx = -1;
+ r->limit = 0;
+ }
+ }
+
+ info->status.excessive_retries = 0;
if (unlikely(ts.ts_status)) {
sc->ll_stats.dot11ACKFailureCount++;
if (ts.ts_status & AR5K_TXERR_XRETRY)
--- a/drivers/net/wireless/ath5k/desc.c
+++ b/drivers/net/wireless/ath5k/desc.c
@@ -318,6 +318,15 @@
return 0;
}
+/* no mrr support for cards older than 5212 */
+static int
+ath5k_hw_setup_no_mrr(struct ath5k_hw *ah, struct ath5k_desc *desc,
+ unsigned int tx_rate1, u_int tx_tries1, u_int tx_rate2,
+ u_int tx_tries2, unsigned int tx_rate3, u_int tx_tries3)
+{
+ return 0;
+}
+
/*
* Proccess the tx status descriptor on 5210/5211
*/
@@ -352,8 +361,10 @@
AR5K_DESC_TX_STATUS1_ACK_SIG_STRENGTH);
ts->ts_antenna = 1;
ts->ts_status = 0;
- ts->ts_rate = AR5K_REG_MS(tx_ctl->tx_control_0,
+ ts->ts_rate[0] = AR5K_REG_MS(tx_ctl->tx_control_0,
AR5K_2W_TX_DESC_CTL0_XMIT_RATE);
+ ts->ts_retry[0] = ts->ts_longretry;
+ ts->ts_final_idx = 0;
if (!(tx_status->tx_status_0 & AR5K_DESC_TX_STATUS0_FRAME_XMIT_OK)) {
if (tx_status->tx_status_0 &
@@ -405,29 +416,43 @@
AR5K_DESC_TX_STATUS1_XMIT_ANTENNA) ? 2 : 1;
ts->ts_status = 0;
- switch (AR5K_REG_MS(tx_status->tx_status_1,
- AR5K_DESC_TX_STATUS1_FINAL_TS_INDEX)) {
- case 0:
- ts->ts_rate = tx_ctl->tx_control_3 &
- AR5K_4W_TX_DESC_CTL3_XMIT_RATE0;
- break;
+ ts->ts_final_idx = AR5K_REG_MS(tx_status->tx_status_1,
+ AR5K_DESC_TX_STATUS1_FINAL_TS_INDEX);
+
+ /* The longretry counter has the number of un-acked retries
+ * for the final rate. To get the total number of retries
+ * we have to add the retry counters for the other rates
+ * as well
+ */
+ ts->ts_retry[ts->ts_final_idx] = ts->ts_longretry;
+ switch (ts->ts_final_idx) {
+ case 3:
+ ts->ts_rate[3] = AR5K_REG_MS(tx_ctl->tx_control_3,
+ AR5K_4W_TX_DESC_CTL3_XMIT_RATE3);
+
+ ts->ts_retry[2] = AR5K_REG_MS(tx_ctl->tx_control_2,
+ AR5K_4W_TX_DESC_CTL2_XMIT_TRIES2);
+ ts->ts_longretry += ts->ts_retry[2];
+ /* fall through */
+ case 2:
+ ts->ts_rate[2] = AR5K_REG_MS(tx_ctl->tx_control_3,
+ AR5K_4W_TX_DESC_CTL3_XMIT_RATE2);
+
+ ts->ts_retry[1] = AR5K_REG_MS(tx_ctl->tx_control_2,
+ AR5K_4W_TX_DESC_CTL2_XMIT_TRIES1);
+ ts->ts_longretry += ts->ts_retry[1];
+ /* fall through */
case 1:
- ts->ts_rate = AR5K_REG_MS(tx_ctl->tx_control_3,
+ ts->ts_rate[1] = AR5K_REG_MS(tx_ctl->tx_control_3,
AR5K_4W_TX_DESC_CTL3_XMIT_RATE1);
- ts->ts_longretry += AR5K_REG_MS(tx_ctl->tx_control_2,
+
+ ts->ts_retry[0] = AR5K_REG_MS(tx_ctl->tx_control_2,
AR5K_4W_TX_DESC_CTL2_XMIT_TRIES1);
- break;
- case 2:
- ts->ts_rate = AR5K_REG_MS(tx_ctl->tx_control_3,
- AR5K_4W_TX_DESC_CTL3_XMIT_RATE2);
- ts->ts_longretry += AR5K_REG_MS(tx_ctl->tx_control_2,
- AR5K_4W_TX_DESC_CTL2_XMIT_TRIES2);
- break;
- case 3:
- ts->ts_rate = AR5K_REG_MS(tx_ctl->tx_control_3,
- AR5K_4W_TX_DESC_CTL3_XMIT_RATE3);
- ts->ts_longretry += AR5K_REG_MS(tx_ctl->tx_control_2,
- AR5K_4W_TX_DESC_CTL2_XMIT_TRIES3);
+ ts->ts_longretry += ts->ts_retry[0];
+ /* fall through */
+ case 0:
+ ts->ts_rate[0] = tx_ctl->tx_control_3 &
+ AR5K_4W_TX_DESC_CTL3_XMIT_RATE0;
break;
}
@@ -653,7 +678,7 @@
} else {
ah->ah_setup_rx_desc = ath5k_hw_setup_rx_desc;
ah->ah_setup_tx_desc = ath5k_hw_setup_2word_tx_desc;
- ah->ah_setup_mrr_tx_desc = ath5k_hw_setup_mrr_tx_desc;
+ ah->ah_setup_mrr_tx_desc = ath5k_hw_setup_no_mrr;
ah->ah_proc_tx_desc = ath5k_hw_proc_2word_tx_status;
}
--- a/drivers/net/wireless/ath5k/ath5k.h
+++ b/drivers/net/wireless/ath5k/ath5k.h
@@ -418,7 +418,9 @@
u16 ts_seqnum;
u16 ts_tstamp;
u8 ts_status;
- u8 ts_rate;
+ u8 ts_rate[4];
+ u8 ts_retry[4];
+ u8 ts_final_idx;
s8 ts_rssi;
u8 ts_shortretry;
u8 ts_longretry;
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