netdev - [PATCH v5 net-next 5/7] net: mvneta: move header prefetch in mvneta_swbm_rx

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Message-Id: <31256b3f92b49cb1f652cc858261d8ba4de4801f.1571472169.git.lorenzo@kernel.org>
Date:   Sat, 19 Oct 2019 10:13:25 +0200
From:   Lorenzo Bianconi <lorenzo@...nel.org>
To:     netdev@...r.kernel.org
Cc:     lorenzo.bianconi@...hat.com, davem@...emloft.net,
        thomas.petazzoni@...tlin.com, brouer@...hat.com,
        ilias.apalodimas@...aro.org, matteo.croce@...hat.com,
        mw@...ihalf.com, jakub.kicinski@...ronome.com
Subject: [PATCH v5 net-next 5/7] net: mvneta: move header prefetch in mvneta_swbm_rx_frame

Move data buffer prefetch in mvneta_swbm_rx_frame after
dma_sync_single_range_for_cpu

Signed-off-by: Ilias Apalodimas <ilias.apalodimas@...aro.org>
Signed-off-by: Jesper Dangaard Brouer <brouer@...hat.com>
Signed-off-by: Lorenzo Bianconi <lorenzo@...nel.org>
---
 drivers/net/ethernet/marvell/mvneta.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/marvell/mvneta.c b/drivers/net/ethernet/marvell/mvneta.c
index 7ca3cd16d781..64f59baa2a3c 100644
--- a/drivers/net/ethernet/marvell/mvneta.c
+++ b/drivers/net/ethernet/marvell/mvneta.c
@@ -2025,6 +2025,9 @@ mvneta_swbm_rx_frame(struct mvneta_port *pp,
 				rx_desc->buf_phys_addr,
 				len, dma_dir);
 
+	/* Prefetch header */
+	prefetch(data);
+
 	xdp->data_hard_start = data;
 	xdp->data = data + MVNETA_SKB_HEADROOM + MVNETA_MH_SIZE;
 	xdp->data_end = xdp->data + data_len;
@@ -2122,14 +2125,10 @@ static int mvneta_rx_swbm(struct napi_struct *napi,
 	while (rx_proc < budget && rx_proc < rx_todo) {
 		struct mvneta_rx_desc *rx_desc = mvneta_rxq_next_desc_get(rxq);
 		u32 rx_status, index;
-		unsigned char *data;
 		struct page *page;
 
 		index = rx_desc - rxq->descs;
 		page = (struct page *)rxq->buf_virt_addr[index];
-		data = page_address(page);
-		/* Prefetch header */
-		prefetch(data);
 
 		rx_status = rx_desc->status;
 		rx_proc++;
-- 
2.21.0