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* [dpdk-dev] [PATCH] net/ixgbe: enable jumbo frame for VF
@ 2019-12-02 20:03 Junyu Jiang
  0 siblings, 0 replies; only message in thread
From: Junyu Jiang @ 2019-12-02 20:03 UTC (permalink / raw)
  To: dev; +Cc: Wenzhuo Lu, Qiming Yang, Junyu Jiang

Enable jumbo frame for VF by configuring DPDK PF.

Signed-off-by: Junyu Jiang <junyux.jiang@intel.com>
---
 drivers/net/ixgbe/ixgbe_pf.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/drivers/net/ixgbe/ixgbe_pf.c b/drivers/net/ixgbe/ixgbe_pf.c
index d0d85e138..66b856e11 100644
--- a/drivers/net/ixgbe/ixgbe_pf.c
+++ b/drivers/net/ixgbe/ixgbe_pf.c
@@ -544,6 +544,7 @@ ixgbe_set_vf_lpe(struct rte_eth_dev *dev, __rte_unused uint32_t vf, uint32_t *ms
 	struct ixgbe_hw *hw = IXGBE_DEV_PRIVATE_TO_HW(dev->data->dev_private);
 	uint32_t new_mtu = msgbuf[1];
 	uint32_t max_frs;
+	uint32_t hlreg0;
 	int max_frame = new_mtu + RTE_ETHER_HDR_LEN + RTE_ETHER_CRC_LEN;
 
 	/* X540 and X550 support jumbo frames in IOV mode */
@@ -560,6 +561,18 @@ ixgbe_set_vf_lpe(struct rte_eth_dev *dev, __rte_unused uint32_t vf, uint32_t *ms
 	max_frs = (IXGBE_READ_REG(hw, IXGBE_MAXFRS) &
 		   IXGBE_MHADD_MFS_MASK) >> IXGBE_MHADD_MFS_SHIFT;
 	if (max_frs < new_mtu) {
+		hlreg0 = IXGBE_READ_REG(hw, IXGBE_HLREG0);
+		if (new_mtu > RTE_ETHER_MAX_LEN) {
+			dev->data->dev_conf.rxmode.offloads |=
+				DEV_RX_OFFLOAD_JUMBO_FRAME;
+			hlreg0 |= IXGBE_HLREG0_JUMBOEN;
+		} else {
+			dev->data->dev_conf.rxmode.offloads &=
+				~DEV_RX_OFFLOAD_JUMBO_FRAME;
+			hlreg0 &= ~IXGBE_HLREG0_JUMBOEN;
+		}
+		IXGBE_WRITE_REG(hw, IXGBE_HLREG0, hlreg0);
+
 		max_frs = new_mtu << IXGBE_MHADD_MFS_SHIFT;
 		IXGBE_WRITE_REG(hw, IXGBE_MAXFRS, max_frs);
 	}
-- 
2.17.1


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2019-12-02 20:03 [dpdk-dev] [PATCH] net/ixgbe: enable jumbo frame for VF Junyu Jiang

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