linux-kernel - [PATCH 1/8] octeontx2-pf: map skb data as device writeable

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Message-ID: <20240513054623.270366-2-bbhushan2@marvell.com>
Date: Mon, 13 May 2024 11:16:16 +0530
From: Bharat Bhushan <bbhushan2@...vell.com>
To: <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <sgoutham@...vell.com>, <gakula@...vell.com>, <sbhatta@...vell.com>,
        <hkelam@...vell.com>, <davem@...emloft.net>, <edumazet@...gle.com>,
        <kuba@...nel.org>, <pabeni@...hat.com>
CC: Bharat Bhushan <bbhushan2@...vell.com>
Subject: [PATCH 1/8] octeontx2-pf: map skb data as device writeable

Crypto hardware need write permission when doing inline
in-place encrypt or decrypt operation on skb-data. So map
this memory as device read-write.

Signed-off-by: Bharat Bhushan <bbhushan2@...vell.com>
---
 drivers/net/ethernet/marvell/octeontx2/nic/otx2_txrx.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_txrx.c b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_txrx.c
index a16e9f244117..847052b57d9b 100644
--- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_txrx.c
+++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_txrx.c
@@ -98,7 +98,7 @@ static dma_addr_t otx2_dma_map_skb_frag(struct otx2_nic *pfvf,
 		offset = skb_frag_off(frag);
 		*len = skb_frag_size(frag);
 	}
-	return otx2_dma_map_page(pfvf, page, offset, *len, DMA_TO_DEVICE);
+	return otx2_dma_map_page(pfvf, page, offset, *len, DMA_BIDIRECTIONAL);
 }
 
 static void otx2_dma_unmap_skb_frags(struct otx2_nic *pfvf, struct sg_list *sg)
@@ -107,7 +107,7 @@ static void otx2_dma_unmap_skb_frags(struct otx2_nic *pfvf, struct sg_list *sg)
 
 	for (seg = 0; seg < sg->num_segs; seg++) {
 		otx2_dma_unmap_page(pfvf, sg->dma_addr[seg],
-				    sg->size[seg], DMA_TO_DEVICE);
+				    sg->size[seg], DMA_BIDIRECTIONAL);
 	}
 	sg->num_segs = 0;
 }
-- 
2.34.1