linux-wireless.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Kan Yan <kyan@google.com>
To: johannes@sipsolutions.net
Cc: linux-wireless@vger.kernel.org,
	make-wifi-fast@lists.bufferbloat.net, toke@redhat.com,
	nbd@nbd.name, ath10k@lists.infradead.org, yiboz@codeaurora.org,
	Kan Yan <kyan@google.com>
Subject: [PATCH v3 2/2] ath10k: Enable Airtime-based Queue Limit (AQL)
Date: Wed,  9 Oct 2019 19:25:02 -0700	[thread overview]
Message-ID: <20191010022502.141862-3-kyan@google.com> (raw)
In-Reply-To: <20191010022502.141862-1-kyan@google.com>

Calculate the estimated airtime pending in the txqs and apply AQL to
prevent excessive amounts of packets being queued in the firmware queue.

Signed-off-by: Kan Yan <kyan@google.com>
---
 drivers/net/wireless/ath/ath10k/htt_rx.c |  1 +
 drivers/net/wireless/ath/ath10k/mac.c    |  8 +++++---
 drivers/net/wireless/ath/ath10k/txrx.c   | 11 ++++++++---
 3 files changed, 14 insertions(+), 6 deletions(-)

diff --git a/drivers/net/wireless/ath/ath10k/htt_rx.c b/drivers/net/wireless/ath/ath10k/htt_rx.c
index 83a7fb68fd24..f2115b940964 100644
--- a/drivers/net/wireless/ath/ath10k/htt_rx.c
+++ b/drivers/net/wireless/ath/ath10k/htt_rx.c
@@ -3053,6 +3053,7 @@ static void ath10k_htt_rx_tx_fetch_ind(struct ath10k *ar, struct sk_buff *skb)
 
 			num_msdus++;
 			num_bytes += ret;
+			may_tx = ieee80211_txq_aql_check(hw, txq);
 		}
 		ieee80211_return_txq(hw, txq, false);
 		ieee80211_txq_schedule_end(hw, txq->ac);
diff --git a/drivers/net/wireless/ath/ath10k/mac.c b/drivers/net/wireless/ath/ath10k/mac.c
index 0606416dc971..b300a3c506b2 100644
--- a/drivers/net/wireless/ath/ath10k/mac.c
+++ b/drivers/net/wireless/ath/ath10k/mac.c
@@ -3983,6 +3983,9 @@ static bool ath10k_mac_tx_can_push(struct ieee80211_hw *hw,
 	struct ath10k_txq *artxq = (void *)txq->drv_priv;
 
 	/* No need to get locks */
+	if (!ieee80211_txq_aql_check(hw, txq))
+		return false;
+
 	if (ar->htt.tx_q_state.mode == HTT_TX_MODE_SWITCH_PUSH)
 		return true;
 
@@ -4009,13 +4012,11 @@ static u16 ath10k_mac_update_airtime(struct ath10k *ar,
 {
 	struct ath10k_sta *arsta;
 	u32 pktlen;
-	u16 airtime = 0;
+	s32 airtime = 0;
 
 	if (!txq || !txq->sta)
 		return airtime;
 
-	if (test_bit(WMI_SERVICE_REPORT_AIRTIME, ar->wmi.svc_map))
-		return airtime;
 
 	spin_lock_bh(&ar->data_lock);
 	arsta = (struct ath10k_sta *)txq->sta->drv_priv;
@@ -4038,6 +4039,7 @@ static u16 ath10k_mac_update_airtime(struct ath10k *ar,
 	}
 	spin_unlock_bh(&ar->data_lock);
 
+	ieee80211_sta_register_pending_airtime(txq->sta, txq->tid, airtime);
 	return airtime;
 }
 
diff --git a/drivers/net/wireless/ath/ath10k/txrx.c b/drivers/net/wireless/ath/ath10k/txrx.c
index 4102df016931..739046b34d4b 100644
--- a/drivers/net/wireless/ath/ath10k/txrx.c
+++ b/drivers/net/wireless/ath/ath10k/txrx.c
@@ -84,9 +84,14 @@ int ath10k_txrx_tx_unref(struct ath10k_htt *htt,
 		wake_up(&htt->empty_tx_wq);
 	spin_unlock_bh(&htt->tx_lock);
 
-	if (txq && txq->sta && skb_cb->airtime_est)
-		ieee80211_sta_register_airtime(txq->sta, txq->tid,
-					       skb_cb->airtime_est, 0);
+	if (txq && txq->sta && skb_cb->airtime_est) {
+		if (!test_bit(WMI_SERVICE_REPORT_AIRTIME, ar->wmi.svc_map))
+			ieee80211_sta_register_airtime(txq->sta, txq->tid,
+						       skb_cb->airtime_est, 0);
+
+		ieee80211_sta_release_pending_airtime(txq->sta, txq->tid,
+						      skb_cb->airtime_est);
+	}
 
 	if (ar->bus_param.dev_type != ATH10K_DEV_TYPE_HL)
 		dma_unmap_single(dev, skb_cb->paddr, msdu->len, DMA_TO_DEVICE);
-- 
2.23.0.581.g78d2f28ef7-goog


      parent reply	other threads:[~2019-10-10  2:25 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-10-10  2:25 [PATCH v3 0/2] Implement Airtime-based Queue Limit (AQL) Kan Yan
2019-10-10  2:25 ` [PATCH v3 1/2] mac80211: " Kan Yan
2019-10-10 15:40   ` Johannes Berg
2019-10-10 20:12     ` Toke Høiland-Jørgensen
2019-10-11  2:24       ` Kan Yan
2019-10-11  8:16         ` Johannes Berg
2019-10-10  2:25 ` Kan Yan [this message]

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20191010022502.141862-3-kyan@google.com \
    --to=kyan@google.com \
    --cc=ath10k@lists.infradead.org \
    --cc=johannes@sipsolutions.net \
    --cc=linux-wireless@vger.kernel.org \
    --cc=make-wifi-fast@lists.bufferbloat.net \
    --cc=nbd@nbd.name \
    --cc=toke@redhat.com \
    --cc=yiboz@codeaurora.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).