[PATCH v2 5/5] net/cnxk: select optimized LLC transaction type

[Rahul Bhansali]

LLC transaction optimization by using LDWB LDTYPE option
in SG preparation for Tx. With this, if data is present
and dirty in LLC then the LLC would mark the data clean.

Signed-off-by: Rahul Bhansali <rbhansali at marvell.com>
---
Changes in v2: No change

 drivers/net/cnxk/cn10k_tx.h | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

diff --git a/drivers/net/cnxk/cn10k_tx.h b/drivers/net/cnxk/cn10k_tx.h
index 664e47e1fc..fcd19be77e 100644
--- a/drivers/net/cnxk/cn10k_tx.h
+++ b/drivers/net/cnxk/cn10k_tx.h
@@ -331,9 +331,15 @@ cn10k_nix_tx_skeleton(struct cn10k_eth_txq *txq, uint64_t *cmd,
 		else
 			cmd[2] = NIX_SUBDC_EXT << 60;
 		cmd[3] = 0;
-		cmd[4] = (NIX_SUBDC_SG << 60) | BIT_ULL(48);
+		if (!(flags & NIX_TX_OFFLOAD_MBUF_NOFF_F))
+			cmd[4] = (NIX_SUBDC_SG << 60) | (NIX_SENDLDTYPE_LDWB << 58) | BIT_ULL(48);
+		else
+			cmd[4] = (NIX_SUBDC_SG << 60) | BIT_ULL(48);
 	} else {
-		cmd[2] = (NIX_SUBDC_SG << 60) | BIT_ULL(48);
+		if (!(flags & NIX_TX_OFFLOAD_MBUF_NOFF_F))
+			cmd[2] = (NIX_SUBDC_SG << 60) | (NIX_SENDLDTYPE_LDWB << 58) | BIT_ULL(48);
+		else
+			cmd[2] = (NIX_SUBDC_SG << 60) | BIT_ULL(48);
 	}
 }

@@ -1989,7 +1995,11 @@ cn10k_nix_xmit_pkts_vector(void *tx_queue, uint64_t *ws,

 	senddesc01_w1 = vdupq_n_u64(0);
 	senddesc23_w1 = senddesc01_w1;
-	sgdesc01_w0 = vdupq_n_u64((NIX_SUBDC_SG << 60) | BIT_ULL(48));
+	if (!(flags & NIX_TX_OFFLOAD_MBUF_NOFF_F))
+		sgdesc01_w0 = vdupq_n_u64((NIX_SUBDC_SG << 60) | (NIX_SENDLDTYPE_LDWB << 58) |
+					  BIT_ULL(48));
+	else
+		sgdesc01_w0 = vdupq_n_u64((NIX_SUBDC_SG << 60) | BIT_ULL(48));
 	sgdesc23_w0 = sgdesc01_w0;

 	if (flags & NIX_TX_NEED_EXT_HDR) {
--
2.25.1