From mboxrd@z Thu Jan 1 00:00:00 1970 From: Wenzhuo Lu Subject: [PATCH] net/ixgbe: fix RX queue blocking issue Date: Wed, 22 Feb 2017 10:59:35 +0800 Message-ID: <1487732375-63670-1-git-send-email-wenzhuo.lu@intel.com> Cc: Wenzhuo Lu , stable@dpdk.org To: dev@dpdk.org Return-path: List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" 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 Wang Signed-off-by: Wenzhuo Lu --- 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 4715045..d88832e 100644 --- a/drivers/net/ixgbe/ixgbe_pf.c +++ b/drivers/net/ixgbe/ixgbe_pf.c @@ -397,15 +397,27 @@ int ixgbe_pf_host_configure(struct rte_eth_dev *eth_dev) 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); -- 1.9.3