netdev - [PATCH RFC net-next 2/5] net: mvneta: mark mapped and tso buffers separately

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Message-Id: <E1pjOwj-00Fmko-Aw@rmk-PC.armlinux.org.uk>
Date:   Mon, 03 Apr 2023 19:30:25 +0100
From:   "Russell King (Oracle)" <rmk+kernel@...linux.org.uk>
To:     Marek Beh__n <kabel@...nel.org>
Cc:     Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>, netdev@...r.kernel.org
Subject: [PATCH RFC net-next 2/5] net: mvneta: mark mapped and tso buffers
 separately

Mark dma-mapped skbs and TSO buffers separately, so we can use
buf->type to identify their differences.

Signed-off-by: Russell King (Oracle) <rmk+kernel@...linux.org.uk>
---
 drivers/net/ethernet/marvell/mvneta.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/marvell/mvneta.c b/drivers/net/ethernet/marvell/mvneta.c
index 62400ff61e34..c05649f33d18 100644
--- a/drivers/net/ethernet/marvell/mvneta.c
+++ b/drivers/net/ethernet/marvell/mvneta.c
@@ -638,6 +638,7 @@ struct mvneta_rx_desc {
 #endif
 
 enum mvneta_tx_buf_type {
+	MVNETA_TYPE_TSO,
 	MVNETA_TYPE_SKB,
 	MVNETA_TYPE_XDP_TX,
 	MVNETA_TYPE_XDP_NDO,
@@ -1883,7 +1884,8 @@ static void mvneta_txq_bufs_free(struct mvneta_port *pp,
 			dma_unmap_single(pp->dev->dev.parent,
 					 tx_desc->buf_phys_addr,
 					 tx_desc->data_size, DMA_TO_DEVICE);
-		if (buf->type == MVNETA_TYPE_SKB && buf->skb) {
+		if ((buf->type == MVNETA_TYPE_TSO ||
+		     buf->type == MVNETA_TYPE_SKB) && buf->skb) {
 			bytes_compl += buf->skb->len;
 			pkts_compl++;
 			dev_kfree_skb_any(buf->skb);
@@ -2674,7 +2676,7 @@ mvneta_tso_put_hdr(struct sk_buff *skb, struct mvneta_tx_queue *txq)
 	tx_desc->command |= MVNETA_TXD_F_DESC;
 	tx_desc->buf_phys_addr = txq->tso_hdrs_phys +
 				 txq->txq_put_index * TSO_HEADER_SIZE;
-	buf->type = MVNETA_TYPE_SKB;
+	buf->type = MVNETA_TYPE_TSO;
 	buf->skb = NULL;
 
 	mvneta_txq_inc_put(txq);
-- 
2.30.2