[PATCH net-next v4 14/15] bnxt_en: Add support for inline transmit BDs
From: Michael Chan <michael.chan@broadcom.com>
Date: 2026-06-29 18:50:34
Subsystem:
broadcom bnxt_en 50 gigabit ethernet driver, networking drivers, the rest · Maintainers:
Michael Chan, Pavan Chebbi, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
Newer chips (P5_PLUS) support inline transmit BDs that contain extra data. One such use case is to transmit out-of-sequence kTLS packets with encryption enabled. To account for these inline BDs during TX completion, we add the inline_data_bds field to struct bnxt_sw_tx_bd (tx_buf). tx_buf->is_push will always be set when sending these inline BDs as the operation is similar to push packets. tx_buf->skb will always be NULL as there is no associated SKB. The next patch will make use of this feature. Reviewed-by: Andy Gospodarek <redacted> Signed-off-by: Michael Chan <michael.chan@broadcom.com> --- drivers/net/ethernet/broadcom/bnxt/bnxt.c | 15 ++++++++++++--- drivers/net/ethernet/broadcom/bnxt/bnxt.h | 1 + 2 files changed, 13 insertions(+), 3 deletions(-)
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index 62c1eea01647..ad6c8644e09c 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c@@ -848,7 +848,7 @@ static bool __bnxt_tx_int(struct bnxt *bp, struct bnxt_tx_ring_info *txr, head_buf = tx_buf; skb = tx_buf->skb; - if (unlikely(!skb)) { + if (unlikely(!skb && !tx_buf->is_push)) { bnxt_sched_reset_txr(bp, txr, cons); return rc; }
@@ -860,13 +860,22 @@ static bool __bnxt_tx_int(struct bnxt *bp, struct bnxt_tx_ring_info *txr, } cons = NEXT_TX(cons); - tx_pkts++; - tx_bytes += skb->len; + if (skb) { + tx_pkts++; + tx_bytes += skb->len; + } tx_buf->skb = NULL; tx_buf->is_ts_pkt = 0; if (tx_buf->is_push) { tx_buf->is_push = 0; + cons += tx_buf->inline_data_bds; + tx_buf->inline_data_bds = 0; + if (!skb) { + /* presync BD */ + cons = NEXT_TX(cons); + continue; + } goto next_tx_int; }
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.h b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
index a726940a7014..1a34e334bc18 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.h
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.h@@ -917,6 +917,7 @@ struct bnxt_sw_tx_bd { u8 is_push; u8 is_sw_gso; u8 action; + u8 inline_data_bds; unsigned short nr_frags; union { u16 rx_prod;
--
2.51.0