net/igb: support dev reset

Add support for passive device reset on IGB ports.

Signed-off-by: Gaetan Rivet <gaetan.rivet@6wind.com>
Acked-by: Qi Zhang <qi.z.zhang@intel.com>

diff --git a/drivers/net/e1000/igb_ethdev.c b/drivers/net/e1000/igb_ethdev.c
index f94036c..e542ef5 100644 (file)
--- a/drivers/net/e1000/igb_ethdev.c
+++ b/drivers/net/e1000/igb_ethdev.c
@@ -74,6 +74,7 @@ static void eth_igb_stop(struct rte_eth_dev *dev);
 static int  eth_igb_dev_set_link_up(struct rte_eth_dev *dev);
 static int  eth_igb_dev_set_link_down(struct rte_eth_dev *dev);
 static void eth_igb_close(struct rte_eth_dev *dev);
+static int eth_igb_reset(struct rte_eth_dev *dev);
 static void eth_igb_promiscuous_enable(struct rte_eth_dev *dev);
 static void eth_igb_promiscuous_disable(struct rte_eth_dev *dev);
 static void eth_igb_allmulticast_enable(struct rte_eth_dev *dev);
@@ -351,6 +352,7 @@ static const struct eth_dev_ops eth_igb_ops = {
        .dev_set_link_up      = eth_igb_dev_set_link_up,
        .dev_set_link_down    = eth_igb_dev_set_link_down,
        .dev_close            = eth_igb_close,
+       .dev_reset            = eth_igb_reset,
        .promiscuous_enable   = eth_igb_promiscuous_enable,
        .promiscuous_disable  = eth_igb_promiscuous_disable,
        .allmulticast_enable  = eth_igb_allmulticast_enable,
@@ -1593,6 +1595,33 @@ eth_igb_close(struct rte_eth_dev *dev)
        rte_eth_linkstatus_set(dev, &link);
 }
 
+/*
+ * Reset PF device.
+ */
+static int
+eth_igb_reset(struct rte_eth_dev *dev)
+{
+       int ret;
+
+       /* When a DPDK PMD PF begin to reset PF port, it should notify all
+        * its VF to make them align with it. The detailed notification
+        * mechanism is PMD specific and is currently not implemented.
+        * To avoid unexpected behavior in VF, currently reset of PF with
+        * SR-IOV activation is not supported. It might be supported later.
+        */
+       if (dev->data->sriov.active)
+               return -ENOTSUP;
+
+       ret = eth_igb_dev_uninit(dev);
+       if (ret)
+               return ret;
+
+       ret = eth_igb_dev_init(dev);
+
+       return ret;
+}
+
+
 static int
 igb_get_rx_buffer_size(struct e1000_hw *hw)
 {