[dpdk-dev] [PATCH 2/6] fm10k: Fix jumbo frame issue

[Chen Jing D(Mark)]

From: "Chen Jing D(Mark)" <jing.d.chen at intel.com>

fm10k can't receive frame greater than 1536 and Scatter RX
function can't work correctly. The root cause is
SRRCTL.FM10K_SRRCTL_BUFFER_CHAINING_EN bit is not enabled.

Signed-off-by: Chen Jing D(Mark) <jing.d.chen at intel.com>
---
 drivers/net/fm10k/fm10k_ethdev.c |   12 ++++++------
 1 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/net/fm10k/fm10k_ethdev.c b/drivers/net/fm10k/fm10k_ethdev.c
index a5e09a0..19e718b 100644
--- a/drivers/net/fm10k/fm10k_ethdev.c
+++ b/drivers/net/fm10k/fm10k_ethdev.c
@@ -439,9 +439,14 @@ fm10k_dev_rx_init(struct rte_eth_dev *dev)
 
 		/* It adds dual VLAN length for supporting dual VLAN */
 		if ((dev->data->dev_conf.rxmode.max_rx_pkt_len +
-				2 * FM10K_VLAN_TAG_SIZE) > buf_size){
+				2 * FM10K_VLAN_TAG_SIZE) > buf_size ||
+			dev->data->dev_conf.rxmode.enable_scatter) {
+			uint32_t reg;
 			dev->data->scattered_rx = 1;
 			dev->rx_pkt_burst = fm10k_recv_scattered_pkts;
+			reg = FM10K_READ_REG(hw, FM10K_SRRCTL(i));
+			reg |= FM10K_SRRCTL_BUFFER_CHAINING_EN;
+			FM10K_WRITE_REG(hw, FM10K_SRRCTL(i), reg);
 		}
 
 		/* Enable drop on empty, it's RO for VF */
@@ -452,11 +457,6 @@ fm10k_dev_rx_init(struct rte_eth_dev *dev)
 		FM10K_WRITE_FLUSH(hw);
 	}
 
-	if (dev->data->dev_conf.rxmode.enable_scatter) {
-		dev->rx_pkt_burst = fm10k_recv_scattered_pkts;
-		dev->data->scattered_rx = 1;
-	}
-
 	/* Configure RSS if applicable */
 	fm10k_dev_mq_rx_configure(dev);
 	return 0;
-- 
1.7.7.6