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From: greearb@candelatech.com
To: linux-wireless@vger.kernel.org
Cc: nbd@nbd.name, Ben Greear <greearb@candelatech.com>
Subject: [PATCH 03/12] wifi: mt76: mt7915: debugfs hook to enable TXS for NO_SKB pkt-ids
Date: Wed, 27 Jul 2022 16:01:13 -0700	[thread overview]
Message-ID: <20220727230122.29842-3-greearb@candelatech.com> (raw)
In-Reply-To: <20220727230122.29842-1-greearb@candelatech.com>

From: Ben Greear <greearb@candelatech.com>

This lets user turn on/off this feature.  Enabling gives better
tx-rate related stats, but will cause extra driver and (maybe)
firmware work.  Not sure if it actually affects performance or
not.

Signed-off-by: Ben Greear <greearb@candelatech.com>
---
 .../wireless/mediatek/mt76/mt7915/debugfs.c   | 24 +++++++++++++++++++
 .../net/wireless/mediatek/mt76/mt7915/mac.c   |  3 ++-
 .../wireless/mediatek/mt76/mt7915/mt7915.h    |  5 ++++
 3 files changed, 31 insertions(+), 1 deletion(-)

diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/debugfs.c b/drivers/net/wireless/mediatek/mt76/mt7915/debugfs.c
index cab6e02e1f8c..f71d80cd4002 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/debugfs.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/debugfs.c
@@ -633,6 +633,29 @@ mt7915_fw_util_wa_show(struct seq_file *file, void *data)
 
 DEFINE_SHOW_ATTRIBUTE(mt7915_fw_util_wa);
 
+static int
+mt7915_txs_for_no_skb_set(void *data, u64 val)
+{
+	struct mt7915_dev *dev = data;
+
+	dev->txs_for_no_skb_enabled = !!val;
+
+	return 0;
+}
+
+static int
+mt7915_txs_for_no_skb_get(void *data, u64 *val)
+{
+	struct mt7915_dev *dev = data;
+
+	*val = dev->txs_for_no_skb_enabled;
+
+	return 0;
+}
+
+DEFINE_DEBUGFS_ATTRIBUTE(fops_txs_for_no_skb, mt7915_txs_for_no_skb_get,
+			 mt7915_txs_for_no_skb_set, "%lld\n");
+
 static void
 mt7915_ampdu_stat_read_phy(struct mt7915_phy *phy,
 			   struct seq_file *file)
@@ -1017,6 +1040,7 @@ int mt7915_init_debugfs(struct mt7915_phy *phy)
 			    &mt7915_fw_util_wm_fops);
 	debugfs_create_file("fw_util_wa", 0400, dir, dev,
 			    &mt7915_fw_util_wa_fops);
+	debugfs_create_file("force_txs", 0600, dir, dev, &fops_txs_for_no_skb);
 	debugfs_create_file("implicit_txbf", 0600, dir, dev,
 			    &fops_implicit_txbf);
 	debugfs_create_file("txpower_sku", 0400, dir, phy,
diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/mac.c b/drivers/net/wireless/mediatek/mt76/mt7915/mac.c
index 2d1a8d8b04fb..cf4d11c0a88d 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/mac.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/mac.c
@@ -1257,7 +1257,8 @@ void mt7915_mac_write_txwi(struct mt7915_dev *dev, __le32 *txwi,
 	txwi[4] = 0;
 
 	val = FIELD_PREP(MT_TXD5_PID, pid);
-	if (pid >= MT_PACKET_ID_FIRST)
+	if (pid >= MT_PACKET_ID_FIRST ||
+	    (pid == MT_PACKET_ID_NO_SKB && dev->txs_for_no_skb_enabled))
 		val |= MT_TXD5_TX_STATUS_HOST;
 	txwi[5] = cpu_to_le32(val);
 
diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h b/drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h
index 4dcae6991669..fa755bfa223f 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h
@@ -294,6 +294,11 @@ struct mt7915_dev {
 	u16 chainmask;
 	u16 chainshift;
 	u32 hif_idx;
+	/* Should we request TXS for MT_PACKET_ID_NO_SKB?  Doing so gives better
+	 * costs but causes a great deal more TXS packet processing by driver and
+	 * creation by firmware, so may be a performance drag.
+	 */
+	bool txs_for_no_skb_enabled;
 
 	struct work_struct init_work;
 	struct work_struct rc_work;
-- 
2.20.1


  parent reply	other threads:[~2022-07-27 23:01 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-07-27 23:01 [PATCH 01/12] wifi: mt76: mt7915: cache sgi in wcid greearb
2022-07-27 23:01 ` [PATCH 02/12] wifi: mt76: mt7915: allow processing TXS for 'NO_SKB' pkt-ids greearb
2022-07-27 23:01 ` greearb [this message]
2022-07-27 23:01 ` [PATCH 04/12] wifi: mt76: mt7915: txfree status to show txcount instead of latency greearb
2022-07-27 23:01 ` [PATCH 05/12] wifi: mt76: mt7915: report tx-retries greearb
2022-07-28  3:20   ` Ryder Lee
2022-07-28  4:11     ` Ben Greear
2022-07-28  4:22       ` Ryder Lee
2022-07-27 23:01 ` [PATCH 06/12] wifi: mt76: mt7915: add support for tx-overrides greearb
2022-07-27 23:01 ` [PATCH 07/12] wifi: mt76: mt7915: support enabling rx group-5 status greearb
2022-07-27 23:01 ` [PATCH 08/12] wifi: mt76: mt7915: use nss for calculating rx-chains greearb
2022-07-27 23:01 ` [PATCH 09/12] wifi: mt76: mt7915: ethtool group-5 rx stats information greearb
2022-07-27 23:01 ` [PATCH 10/12] wifi: mt76: mt7915: ethtool counters for driver rx path greearb
2022-07-27 23:01 ` [PATCH 11/12] wifi: mt76: mt7915: add ethtool tx/rx pkts/bytes greearb
2022-07-27 23:01 ` [PATCH 12/12] wifi: mt76: mt7915: add rx-ppdu-size-out-of-range ethtool counter greearb

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