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bnxt_en: Add helper to fill SW USO payload BDs

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Move the code that fills a payload BD and its software ring entry in
bnxt_sw_udp_gso_xmit() into a helper, bnxt_sw_gso_data_bd().

No functional change. A following patch uses the helper to add a pad BD
to short SW USO segments.

Reviewed-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: Joe Damato <joe@dama.to>
Link: https://patch.msgid.link/20261009215426.2377946-2-joe@dama.to
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
This commit is contained in:
Joe Damato 2026-10-09 14:54:23 -07:00 committed by Paolo Abeni
parent 73022f605c
commit 70f63dc608
1 changed files with 22 additions and 11 deletions
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33
drivers/net/ethernet/broadcom/bnxt/bnxt_gso.c
View File

@ -31,6 +31,26 @@ static u32 bnxt_sw_gso_lhint(unsigned int len)
return TX_BD_FLAGS_LHINT_2048_AND_LARGER;
}
static struct tx_bd *bnxt_sw_gso_data_bd(struct bnxt *bp,
struct bnxt_tx_ring_info *txr,
u16 prod, dma_addr_t addr,
unsigned int len)
{
struct tx_bd *txbd = &txr->tx_desc_ring[TX_RING(bp, prod)][TX_IDX(prod)];
struct bnxt_sw_tx_bd *tx_buf = &txr->tx_buf_ring[RING_TX(bp, prod)];
txbd->tx_bd_haddr = cpu_to_le64(addr);
txbd->tx_bd_len_flags_type = cpu_to_le32(len << TX_BD_LEN_SHIFT);
txbd->tx_bd_opaque = 0;
dma_unmap_addr_set(tx_buf, mapping, addr);
dma_unmap_len_set(tx_buf, len, 0);
tx_buf->skb = NULL;
tx_buf->is_sw_gso = 0;
return txbd;
}
/* Transmit an skb requiring software UDP segmentation.
*
* Returns 1 if the skb was queued and new BDs were produced, 0 if the skb
@ -181,15 +201,10 @@ int bnxt_sw_udp_gso_xmit(struct bnxt *bp, struct bnxt_tx_ring_info *txr,
while (tso_dma_map_next(&map, &dma_addr, &chunk_len,
&mapping_len, seg_payload)) {
prod = NEXT_TX(prod);
txbd = &txr->tx_desc_ring[TX_RING(bp, prod)][TX_IDX(prod)];
txbd = bnxt_sw_gso_data_bd(bp, txr, prod, dma_addr,
chunk_len);
tx_buf = &txr->tx_buf_ring[RING_TX(bp, prod)];
txbd->tx_bd_haddr = cpu_to_le64(dma_addr);
dma_unmap_addr_set(tx_buf, mapping, dma_addr);
dma_unmap_len_set(tx_buf, len, 0);
tx_buf->skb = NULL;
tx_buf->is_sw_gso = 0;
if (mapping_len) {
if (last_unmap_buf) {
dma_unmap_addr_set(last_unmap_buf,
@ -204,10 +219,6 @@ int bnxt_sw_udp_gso_xmit(struct bnxt *bp, struct bnxt_tx_ring_info *txr,
}
last_unmap_buf = tx_buf;
flags = chunk_len << TX_BD_LEN_SHIFT;
txbd->tx_bd_len_flags_type = cpu_to_le32(flags);
txbd->tx_bd_opaque = 0;
seg_payload -= chunk_len;
}