netdev - [PATCH net-next v2 02/10] bnxt_en: Add is_ts_pkt field to struct bnxt_sw_tx

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Date: Fri, 28 Jun 2024 12:29:57 -0700
From: Michael Chan <michael.chan@...adcom.com>
To: davem@...emloft.net
Cc: netdev@...r.kernel.org,
	edumazet@...gle.com,
	kuba@...nel.org,
	pabeni@...hat.com,
	pavan.chebbi@...adcom.com,
	andrew.gospodarek@...adcom.com,
	richardcochran@...il.com,
	horms@...nel.org,
	przemyslaw.kitszel@...el.com
Subject: [PATCH net-next v2 02/10] bnxt_en: Add is_ts_pkt field to struct bnxt_sw_tx_bd

Remove the unused is_gso field and add the is_ts_pkt field to struct
bnxt_sw_tx_bd.  This field will mark the TX BD that has requested
HW TX timestamp.  The field needs to be cleared if the timestamp packet
is later aborted.  This field will be useful when processing the
new TX timestamp completion from the hardware in the next patches.

Reviewed-by: Pavan Chebbi <pavan.chebbi@...adcom.com>
Reviewed-by: Andy Gospodarek <andrew.gospodarek@...adcom.com>
Signed-off-by: Michael Chan <michael.chan@...adcom.com>
---
v2: Fix the unwind of txr->is_ts_pkt when bnxt_start_xmit() aborts.

 drivers/net/ethernet/broadcom/bnxt/bnxt.c | 7 ++++++-
 drivers/net/ethernet/broadcom/bnxt/bnxt.h | 2 +-
 2 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index 1bd0c5973252..af064dcc6142 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -522,6 +522,7 @@ static netdev_tx_t bnxt_start_xmit(struct sk_buff *skb, struct net_device *dev)
 				if (vlan_tag_flags)
 					ptp->tx_hdr_off += VLAN_HLEN;
 				lflags |= cpu_to_le32(TX_BD_FLAGS_STAMP);
+				tx_buf->is_ts_pkt = 1;
 				skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
 			} else {
 				atomic_inc(&bp->ptp_cfg->tx_avail);
@@ -758,6 +759,7 @@ static netdev_tx_t bnxt_start_xmit(struct sk_buff *skb, struct net_device *dev)
 	dev_kfree_skb_any(skb);
 tx_kick_pending:
 	if (BNXT_TX_PTP_IS_SET(lflags)) {
+		txr->tx_buf_ring[txr->tx_prod].is_ts_pkt = 0;
 		atomic64_inc(&bp->ptp_cfg->stats.ts_err);
 		atomic_inc(&bp->ptp_cfg->tx_avail);
 	}
@@ -781,6 +783,7 @@ static void __bnxt_tx_int(struct bnxt *bp, struct bnxt_tx_ring_info *txr,
 	while (RING_TX(bp, cons) != hw_cons) {
 		struct bnxt_sw_tx_bd *tx_buf;
 		struct sk_buff *skb;
+		bool is_ts_pkt;
 		int j, last;
 
 		tx_buf = &txr->tx_buf_ring[RING_TX(bp, cons)];
@@ -800,6 +803,8 @@ static void __bnxt_tx_int(struct bnxt *bp, struct bnxt_tx_ring_info *txr,
 			tx_buf->is_push = 0;
 			goto next_tx_int;
 		}
+		is_ts_pkt = tx_buf->is_ts_pkt;
+		tx_buf->is_ts_pkt = 0;
 
 		dma_unmap_single(&pdev->dev, dma_unmap_addr(tx_buf, mapping),
 				 skb_headlen(skb), DMA_TO_DEVICE);
@@ -814,7 +819,7 @@ static void __bnxt_tx_int(struct bnxt *bp, struct bnxt_tx_ring_info *txr,
 				skb_frag_size(&skb_shinfo(skb)->frags[j]),
 				DMA_TO_DEVICE);
 		}
-		if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_IN_PROGRESS)) {
+		if (unlikely(is_ts_pkt)) {
 			if (BNXT_CHIP_P5(bp)) {
 				/* PTP worker takes ownership of the skb */
 				if (!bnxt_get_tx_ts_p5(bp, skb)) {
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.h b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
index d3ad73d4c00a..00976e8a1e6a 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.h
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
@@ -874,7 +874,7 @@ struct bnxt_sw_tx_bd {
 	DEFINE_DMA_UNMAP_ADDR(mapping);
 	DEFINE_DMA_UNMAP_LEN(len);
 	struct page		*page;
-	u8			is_gso;
+	u8			is_ts_pkt;
 	u8			is_push;
 	u8			action;
 	unsigned short		nr_frags;
-- 
2.30.1


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