From 9941892b7a457da71ad38c73fbd7e19213fae2bb Mon Sep 17 00:00:00 2001
From: Wenzhuo Lu <wenzhuo.lu@intel.com>
Date: Wed, 22 Feb 2017 10:59:35 +0800
Subject: [PATCH] net/ixgbe: fix Rx queue blocking issue
In the IOV scenario, multi Rx queues can be assigned to one VF.
If the dropping is not enabled, when no descriptors are available
for one queue, this queue can block others.
Fixes: 00e30184daa0 ("ixgbe: add PF support")
Cc: stable@dpdk.org
Suggested-by: Liang-Min Larry Wang <liang-min.wang@intel.com>
Signed-off-by: Wenzhuo Lu <wenzhuo.lu@intel.com>
---
drivers/net/ixgbe/ixgbe_pf.c | 14 +++++++++++++-
1 file changed, 13 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ixgbe/ixgbe_pf.c b/drivers/net/ixgbe/ixgbe_pf.c
index 4715045f51..d88832e5cc 100644
--- a/drivers/net/ixgbe/ixgbe_pf.c
+++ b/drivers/net/ixgbe/ixgbe_pf.c
@@ -397,15 +397,27 @@ ixgbe_vf_reset_msg(struct rte_eth_dev *dev, uint16_t vf)
uint32_t reg_offset, vf_shift;
const uint8_t VFRE_SHIFT = 5; /* VFRE 32 bits per slot */
const uint8_t VFRE_MASK = (uint8_t)((1U << VFRE_SHIFT) - 1);
+ uint8_t nb_q_per_pool;
+ int i;
vf_shift = vf & VFRE_MASK;
reg_offset = (vf >> VFRE_SHIFT) > 0 ? 1 : 0;
- /* enable transmit and receive for vf */
+ /* enable transmit for vf */
reg = IXGBE_READ_REG(hw, IXGBE_VFTE(reg_offset));
reg |= (reg | (1 << vf_shift));
IXGBE_WRITE_REG(hw, IXGBE_VFTE(reg_offset), reg);
+ /* enable all queue drop for IOV */
+ nb_q_per_pool = RTE_ETH_DEV_SRIOV(dev).nb_q_per_pool;
+ for (i = vf * nb_q_per_pool; i < (vf + 1) * nb_q_per_pool; i++) {
+ IXGBE_WRITE_FLUSH(hw);
+ reg = IXGBE_QDE_ENABLE | IXGBE_QDE_WRITE;
+ reg |= i << IXGBE_QDE_IDX_SHIFT;
+ IXGBE_WRITE_REG(hw, IXGBE_QDE, reg);
+ }
+
+ /* enable receive for vf */
reg = IXGBE_READ_REG(hw, IXGBE_VFRE(reg_offset));
reg |= (reg | (1 << vf_shift));
IXGBE_WRITE_REG(hw, IXGBE_VFRE(reg_offset), reg);
--
2.39.5