net/mrvl: support updating MTU

Add support for updating mtu.

Signed-off-by: Jacek Siuda <jck@semihalf.com>
Signed-off-by: Tomasz Duszynski <tdu@semihalf.com>

diff --git a/doc/guides/nics/features/mrvl.ini b/doc/guides/nics/features/mrvl.ini
index c3b9edf..13cfaab 100644 (file)
--- a/doc/guides/nics/features/mrvl.ini
+++ b/doc/guides/nics/features/mrvl.ini
@@ -6,3 +6,4 @@
 [Features]
 Speed capabilities   = Y
 Link status          = Y
+MTU update           = Y

diff --git a/drivers/net/mrvl/mrvl_ethdev.c b/drivers/net/mrvl/mrvl_ethdev.c
index 7bd0dad..628d4de 100644 (file)
--- a/drivers/net/mrvl/mrvl_ethdev.c
+++ b/drivers/net/mrvl/mrvl_ethdev.c
@@ -238,6 +238,38 @@ mrvl_dev_configure(struct rte_eth_dev *dev)
        return 0;
 }
 
+/**
+ * DPDK callback to change the MTU.
+ *
+ * Setting the MTU affects hardware MRU (packets larger than the MRU
+ * will be dropped).
+ *
+ * @param dev
+ *   Pointer to Ethernet device structure.
+ * @param mtu
+ *   New MTU.
+ *
+ * @return
+ *   0 on success, negative error value otherwise.
+ */
+static int
+mrvl_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
+{
+       struct mrvl_priv *priv = dev->data->dev_private;
+       /* extra MV_MH_SIZE bytes are required for Marvell tag */
+       uint16_t mru = mtu + MV_MH_SIZE + ETHER_HDR_LEN + ETHER_CRC_LEN;
+       int ret;
+
+       if (mtu < ETHER_MIN_MTU || mru > MRVL_PKT_SIZE_MAX)
+               return -EINVAL;
+
+       ret = pp2_ppio_set_mru(priv->ppio, mru);
+       if (ret)
+               return ret;
+
+       return pp2_ppio_set_mtu(priv->ppio, mtu);
+}
+
 /**
  * DPDK callback to bring the link up.
  *
@@ -257,6 +289,17 @@ mrvl_dev_set_link_up(struct rte_eth_dev *dev)
        if (ret)
                return ret;
 
+       /*
+        * mtu/mru can be updated if pp2_ppio_enable() was called at least once
+        * as pp2_ppio_enable() changes port->t_mode from default 0 to
+        * PP2_TRAFFIC_INGRESS_EGRESS.
+        *
+        * Set mtu to default DPDK value here.
+        */
+       ret = mrvl_mtu_set(dev, dev->data->mtu);
+       if (ret)
+               pp2_ppio_disable(priv->ppio);
+
        dev->data->dev_link.link_status = ETH_LINK_UP;
 
        return ret;
@@ -887,6 +930,7 @@ static const struct eth_dev_ops mrvl_ops = {
        .dev_close = mrvl_dev_close,
        .link_update = mrvl_link_update,
        .mac_addr_set = mrvl_mac_addr_set,
+       .mtu_set = mrvl_mtu_set,
        .dev_infos_get = mrvl_dev_infos_get,
        .rxq_info_get = mrvl_rxq_info_get,
        .txq_info_get = mrvl_txq_info_get,