linux-kernel - [PATCH] net: alteon: migrate to dma_map_phys instead of map

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Message-ID: <20251021020939.1121-1-chuguangqing@inspur.com>
Date: Tue, 21 Oct 2025 10:09:39 +0800
From: Chu Guangqing <chuguangqing@...pur.com>
To: <jes@...ined-monkey.org>, <andrew+netdev@...n.ch>, <davem@...emloft.net>,
	<edumazet@...gle.com>, <kuba@...nel.xn--org-o16s>, <pabeni@...hat.com>
CC: <linux-acenic@...site.dk>, <netdev@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, Chu Guangqing <chuguangqing@...pur.com>
Subject: [PATCH] net: alteon: migrate to dma_map_phys instead of map_page

After introduction of dma_map_phys(), there is no need to convert
from physical address to struct page in order to map page. So let's
use it directly.

Signed-off-by: Chu Guangqing <chuguangqing@...pur.com>
---
 drivers/net/ethernet/alteon/acenic.c | 26 +++++++++++---------------
 1 file changed, 11 insertions(+), 15 deletions(-)

diff --git a/drivers/net/ethernet/alteon/acenic.c b/drivers/net/ethernet/alteon/acenic.c
index 9e6f91df2ba0..090413f1eba7 100644
--- a/drivers/net/ethernet/alteon/acenic.c
+++ b/drivers/net/ethernet/alteon/acenic.c
@@ -1639,10 +1639,9 @@ static void ace_load_std_rx_ring(struct net_device *dev, int nr_bufs)
 		if (!skb)
 			break;
 
-		mapping = dma_map_page(&ap->pdev->dev,
-				       virt_to_page(skb->data),
-				       offset_in_page(skb->data),
-				       ACE_STD_BUFSIZE, DMA_FROM_DEVICE);
+		mapping = dma_map_phys(&ap->pdev->dev,
+				       virt_to_phys(skb->data),
+				       ACE_STD_BUFSIZE, DMA_FROM_DEVICE, 0);
 		ap->skb->rx_std_skbuff[idx].skb = skb;
 		dma_unmap_addr_set(&ap->skb->rx_std_skbuff[idx],
 				   mapping, mapping);
@@ -1700,10 +1699,9 @@ static void ace_load_mini_rx_ring(struct net_device *dev, int nr_bufs)
 		if (!skb)
 			break;
 
-		mapping = dma_map_page(&ap->pdev->dev,
-				       virt_to_page(skb->data),
-				       offset_in_page(skb->data),
-				       ACE_MINI_BUFSIZE, DMA_FROM_DEVICE);
+		mapping = dma_map_phys(&ap->pdev->dev,
+				       virt_to_phys(skb->data),
+				       ACE_MINI_BUFSIZE, DMA_FROM_DEVICE, 0);
 		ap->skb->rx_mini_skbuff[idx].skb = skb;
 		dma_unmap_addr_set(&ap->skb->rx_mini_skbuff[idx],
 				   mapping, mapping);
@@ -1756,10 +1754,9 @@ static void ace_load_jumbo_rx_ring(struct net_device *dev, int nr_bufs)
 		if (!skb)
 			break;
 
-		mapping = dma_map_page(&ap->pdev->dev,
-				       virt_to_page(skb->data),
-				       offset_in_page(skb->data),
-				       ACE_JUMBO_BUFSIZE, DMA_FROM_DEVICE);
+		mapping = dma_map_phys(&ap->pdev->dev,
+				       virt_to_phys(skb->data),
+				       ACE_JUMBO_BUFSIZE, DMA_FROM_DEVICE, 0);
 		ap->skb->rx_jumbo_skbuff[idx].skb = skb;
 		dma_unmap_addr_set(&ap->skb->rx_jumbo_skbuff[idx],
 				   mapping, mapping);
@@ -2362,9 +2359,8 @@ ace_map_tx_skb(struct ace_private *ap, struct sk_buff *skb,
 	dma_addr_t mapping;
 	struct tx_ring_info *info;
 
-	mapping = dma_map_page(&ap->pdev->dev, virt_to_page(skb->data),
-			       offset_in_page(skb->data), skb->len,
-			       DMA_TO_DEVICE);
+	mapping = dma_map_phys(&ap->pdev->dev, skb->data,
+			       skb->len, DMA_TO_DEVICE, 0);
 
 	info = ap->skb->tx_skbuff + idx;
 	info->skb = tail;
-- 
2.43.7