linux-wireless.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: greearb@candelatech.com
To: linux-wireless@vger.kernel.org
Cc: Ben Greear <greearb@candelatech.com>
Subject: [PATCH v8 5/9] mt76: mt7915:  debugfs hook to enable TXS for NO_SKB pkt-ids
Date: Thu, 19 Aug 2021 13:49:46 -0700	[thread overview]
Message-ID: <20210819204950.12150-5-greearb@candelatech.com> (raw)
In-Reply-To: <20210819204950.12150-1-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 91664ac63a8d..b2df42802868 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/debugfs.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/debugfs.c
@@ -109,6 +109,29 @@ mt7915_fw_debug_get(void *data, u64 *val)
 DEFINE_DEBUGFS_ATTRIBUTE(fops_fw_debug, mt7915_fw_debug_get,
 			 mt7915_fw_debug_set, "%lld\n");
 
+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)
@@ -344,6 +367,7 @@ int mt7915_init_debugfs(struct mt7915_dev *dev)
 				    mt7915_queues_acq);
 	debugfs_create_file("tx_stats", 0400, dir, dev, &mt7915_tx_stats_fops);
 	debugfs_create_file("fw_debug", 0600, dir, dev, &fops_fw_debug);
+	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_u32("dfs_hw_pattern", 0400, dir, &dev->hw_pattern);
diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/mac.c b/drivers/net/wireless/mediatek/mt76/mt7915/mac.c
index f6ed5d5febb7..39d2175862bd 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/mac.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/mac.c
@@ -1047,7 +1047,8 @@ 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 ea6da6b4e92d..1c0a1bf91c1c 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h
@@ -223,6 +223,11 @@ struct mt7915_dev {
 
 	u16 chainmask;
 	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:[~2021-08-19 20:50 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-19 20:49 [PATCH v8 1/9] mt76: add hash lookup for skb on TXS status_list greearb
2021-08-19 20:49 ` [PATCH v8 2/9] mt76: mt7915: fix potential NPE in TXS processing greearb
2021-08-19 20:49 ` [PATCH v8 3/9] mt76: mt7915: move TXS parsing to its own method greearb
2021-08-19 20:49 ` [PATCH v8 4/9] mt76: mt7915: allow processing TXS for 'NO_SKB' pkt-ids greearb
2021-08-19 20:49 ` greearb [this message]
2021-08-19 20:49 ` [PATCH v8 6/9] mt76: mt7915: add note about TXSFM 0x2 greearb
2021-08-19 20:49 ` [PATCH v8 7/9] mt76: mt7915: txfree status to show txcount instead of latency greearb
2021-08-19 20:49 ` [PATCH v8 8/9] mt76: mt7915: report tx-retries greearb
2021-08-19 20:49 ` [PATCH v8 9/9] mt76: mt7915: add a missing HT flag for GI parsing greearb

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=20210819204950.12150-5-greearb@candelatech.com \
    --to=greearb@candelatech.com \
    --cc=linux-wireless@vger.kernel.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).