In SR-IOV mode a VF sending LFC or PFC would throttle the
entire port.
The workaround is to add a filter to drop pause frames from
VFs from sending pause frames.
Signed-off-by: Wenzhuo Lu <wenzhuo.lu at intel.com>
---
drivers/net/ixgbe/ixgbe_pf.c | 43 +++++++++++++++++++++++++++++++++++++++++++
1 file changed, 43 insertions(+)
diff --git a/drivers/net/ixgbe/ixgbe_pf.c b/drivers/net/ixgbe/ixgbe_pf.c
index fd1c4ca..b33f4e9 100644
--- a/drivers/net/ixgbe/ixgbe_pf.c
+++ b/drivers/net/ixgbe/ixgbe_pf.c
@@ -55,6 +55,7 @@
#define IXGBE_MAX_VFTA (128)
#define IXGBE_VF_MSG_SIZE_DEFAULT 1
#define IXGBE_VF_GET_QUEUE_MSG_SIZE 5
+#define IXGBE_ETHERTYPE_FLOW_CTRL 0x8808
static inline uint16_t
dev_num_vf(struct rte_eth_dev *eth_dev)
@@ -166,6 +167,46 @@ void ixgbe_pf_host_uninit(struct rte_eth_dev *eth_dev)
*vfinfo = NULL;
}
+static void
+ixgbe_add_tx_flow_control_drop_filter(struct rte_eth_dev *eth_dev)
+{
+ struct ixgbe_hw *hw =
+ IXGBE_DEV_PRIVATE_TO_HW(eth_dev->data->dev_private);
+ struct ixgbe_filter_info *filter_info =
+ IXGBE_DEV_PRIVATE_TO_FILTER_INFO(eth_dev->data->dev_private);
+ uint16_t vf_num;
+ int i;
+
+ /* occupy an entity of ether type filter */
+ for (i = 0; i < IXGBE_MAX_ETQF_FILTERS; i++) {
+ if (!(filter_info->ethertype_mask & (1 << i))) {
+ filter_info->ethertype_mask |= 1 << i;
+ filter_info->ethertype_filters[i] =
+ IXGBE_ETHERTYPE_FLOW_CTRL;
+ break;
+ }
+ }
+ if (i == IXGBE_MAX_ETQF_FILTERS) {
+ RTE_LOG(ERR, PMD, "Cannot find an unused ether type filter"
+ " entity for flow control.\n");
+ return;
+ }
+
+ if (hw->mac.ops.set_ethertype_anti_spoofing) {
+ IXGBE_WRITE_REG(hw, IXGBE_ETQF(i),
+ (IXGBE_ETQF_FILTER_EN |
+ IXGBE_ETQF_TX_ANTISPOOF |
+ IXGBE_ETHERTYPE_FLOW_CTRL));
+
+ vf_num = dev_num_vf(eth_dev);
+ for (i = 0; i < vf_num; i++) {
+ hw->mac.ops.set_ethertype_anti_spoofing(hw, true, i);
+ }
+ }
+
+ return;
+}
+
int ixgbe_pf_host_configure(struct rte_eth_dev *eth_dev)
{
uint32_t vtctl, fcrth;
@@ -262,6 +303,8 @@ int ixgbe_pf_host_configure(struct rte_eth_dev *eth_dev)
IXGBE_WRITE_REG(hw, IXGBE_FCRTH_82599(i), fcrth);
}
+ ixgbe_add_tx_flow_control_drop_filter(eth_dev);
+
return 0;
}
--
1.9.3
