linux-kernel - [PATCH v4 12/40] wifi: rtw88: optimize the driver by using atomic iterator

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Date: Thu, 20 Jun 2024 10:56:35 -0700
From: Yury Norov <yury.norov@...il.com>
To: linux-kernel@...r.kernel.org,
	Ping-Ke Shih <pkshih@...ltek.com>,
	Kalle Valo <kvalo@...nel.org>,
	linux-wireless@...r.kernel.org
Cc: Yury Norov <yury.norov@...il.com>,
	Alexey Klimov <alexey.klimov@...aro.org>,
	Bart Van Assche <bvanassche@....org>,
	Jan Kara <jack@...e.cz>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Matthew Wilcox <willy@...radead.org>,
	Mirsad Todorovac <mirsad.todorovac@....unizg.hr>,
	Rasmus Villemoes <linux@...musvillemoes.dk>,
	Sergey Shtylyov <s.shtylyov@....ru>
Subject: [PATCH v4 12/40] wifi: rtw88: optimize the driver by using atomic iterator

rtw_pci_tx_kick_off() and rtw89_pci_tx_kick_off_pending() traverse bitmaps
bit by bit. Simplify it by using atomic for_each_test_and_clear_bit()
iterator.

Signed-off-by: Yury Norov <yury.norov@...il.com>
---
 drivers/net/wireless/realtek/rtw88/pci.c | 6 +++---
 drivers/net/wireless/realtek/rtw89/pci.c | 6 ++----
 2 files changed, 5 insertions(+), 7 deletions(-)

diff --git a/drivers/net/wireless/realtek/rtw88/pci.c b/drivers/net/wireless/realtek/rtw88/pci.c
index 30232f7e3ec5..28c0f4c99cf8 100644
--- a/drivers/net/wireless/realtek/rtw88/pci.c
+++ b/drivers/net/wireless/realtek/rtw88/pci.c
@@ -2,6 +2,7 @@
 /* Copyright(c) 2018-2019  Realtek Corporation
  */
 
+#include <linux/find_atomic.h>
 #include <linux/module.h>
 #include <linux/pci.h>
 #include "main.h"
@@ -790,9 +791,8 @@ static void rtw_pci_tx_kick_off(struct rtw_dev *rtwdev)
 	struct rtw_pci *rtwpci = (struct rtw_pci *)rtwdev->priv;
 	enum rtw_tx_queue_type queue;
 
-	for (queue = 0; queue < RTK_MAX_TX_QUEUE_NUM; queue++)
-		if (test_and_clear_bit(queue, rtwpci->tx_queued))
-			rtw_pci_tx_kick_off_queue(rtwdev, queue);
+	for_each_test_and_clear_bit(queue, rtwpci->tx_queued, RTK_MAX_TX_QUEUE_NUM)
+		rtw_pci_tx_kick_off_queue(rtwdev, queue);
 }
 
 static int rtw_pci_tx_write_data(struct rtw_dev *rtwdev,
diff --git a/drivers/net/wireless/realtek/rtw89/pci.c b/drivers/net/wireless/realtek/rtw89/pci.c
index 03bbcf9b6737..deb06cab5974 100644
--- a/drivers/net/wireless/realtek/rtw89/pci.c
+++ b/drivers/net/wireless/realtek/rtw89/pci.c
@@ -2,6 +2,7 @@
 /* Copyright(c) 2020  Realtek Corporation
  */
 
+#include <linux/find_atomic.h>
 #include <linux/pci.h>
 
 #include "mac.h"
@@ -1234,10 +1235,7 @@ static void rtw89_pci_tx_kick_off_pending(struct rtw89_dev *rtwdev)
 	struct rtw89_pci_tx_ring *tx_ring;
 	int txch;
 
-	for (txch = 0; txch < RTW89_TXCH_NUM; txch++) {
-		if (!test_and_clear_bit(txch, rtwpci->kick_map))
-			continue;
-
+	for_each_test_and_clear_bit(txch, rtwpci->kick_map, RTW89_TXCH_NUM) {
 		tx_ring = &rtwpci->tx_rings[txch];
 		__rtw89_pci_tx_kick_off(rtwdev, tx_ring);
 	}
-- 
2.43.0