fm10k: enable broadcast loopback suppression

In FM10K, a single PCIe port can derive out a few logical ports,
like SRIOV PF/VF devices, VMDQ objects. To better manage them, FM10K
silicon assigns a Unique GLORT ID to each logical port.

When a logical port sends a broadcast packet, the silicon will flood
it to all logical ports, including the one that sent the broadcast packet.
To prevent this, silicon has an rxq register to store the glort id of
the logical port that queue binds to.

FM10K has a switch core inside, which has a loopback suppression
mechanism in the switch level. Switch level loopback suppression mostly
works for the ether port traffic.

This patch assigns a SGLORT for each RX queue, and enables PCIe port
level loopback suppression.

Signed-off-by: Shaopeng He <shaopeng.he@intel.com>
Acked-by: Jing Chen <jing.d.chen@intel.com>

diff --git a/drivers/net/fm10k/fm10k_ethdev.c b/drivers/net/fm10k/fm10k_ethdev.c
index 068a20c..3ae604d 100644 (file)
--- a/drivers/net/fm10k/fm10k_ethdev.c
+++ b/drivers/net/fm10k/fm10k_ethdev.c
@@ -687,13 +687,16 @@ static int
 fm10k_dev_rx_init(struct rte_eth_dev *dev)
 {
        struct fm10k_hw *hw = FM10K_DEV_PRIVATE_TO_HW(dev->data->dev_private);
+       struct fm10k_macvlan_filter_info *macvlan;
        struct rte_intr_handle *intr_handle = &dev->pci_dev->intr_handle;
        int i, ret;
        struct fm10k_rx_queue *rxq;
        uint64_t base_addr;
        uint32_t size;
        uint32_t rxdctl = FM10K_RXDCTL_WRITE_BACK_MIN_DELAY;
+       uint32_t logic_port = hw->mac.dglort_map;
        uint16_t buf_size;
+       uint16_t queue_stride = 0;
 
        /* enable RXINT for interrupt mode */
        i = 0;
@@ -748,7 +751,8 @@ fm10k_dev_rx_init(struct rte_eth_dev *dev)
                buf_size -= FM10K_RX_DATABUF_ALIGN;
 
                FM10K_WRITE_REG(hw, FM10K_SRRCTL(i),
-                               buf_size >> FM10K_SRRCTL_BSIZEPKT_SHIFT);
+                               (buf_size >> FM10K_SRRCTL_BSIZEPKT_SHIFT) |
+                               FM10K_SRRCTL_LOOPBACK_SUPPRESS);
 
                /* It adds dual VLAN length for supporting dual VLAN */
                if ((dev->data->dev_conf.rxmode.max_rx_pkt_len +
@@ -775,6 +779,18 @@ fm10k_dev_rx_init(struct rte_eth_dev *dev)
        /* Decide the best RX function */
        fm10k_set_rx_function(dev);
 
+       /* update RX_SGLORT for loopback suppress*/
+       if (hw->mac.type != fm10k_mac_pf)
+               return 0;
+       macvlan = FM10K_DEV_PRIVATE_TO_MACVLAN(dev->data->dev_private);
+       if (macvlan->nb_queue_pools)
+               queue_stride = dev->data->nb_rx_queues / macvlan->nb_queue_pools;
+       for (i = 0; i < dev->data->nb_rx_queues; ++i) {
+               if (i && queue_stride && !(i % queue_stride))
+                       logic_port++;
+               FM10K_WRITE_REG(hw, FM10K_RX_SGLORT(i), logic_port);
+       }
+
        return 0;
 }