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From: Olivier Matz <olivier.matz@6wind.com>
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Cc: bruce.richardson@intel.com,
fengtian.guo@6wind.com
Date: Mon, 4 Jul 2016 10:24:19 +0200
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Subject: [dpdk-dev] [PATCH 3/3] net/mlx4: add link up/down callback function
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From: Guo Fengtian <fengtian.guo@6wind.com>
Implement dev_set_link_up and dev_set_link_down device
operations. Code is inspired from mlx5.
Signed-off-by: Guo Fengtian <fengtian.guo@6wind.com>
---
drivers/net/mlx4/mlx4.c | 86 +++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 86 insertions(+)
diff --git a/drivers/net/mlx4/mlx4.c b/drivers/net/mlx4/mlx4.c
index 1dd14f4..5dd77c2 100644
--- a/drivers/net/mlx4/mlx4.c
+++ b/drivers/net/mlx4/mlx4.c
@@ -4328,6 +4328,90 @@ mlx4_dev_close(struct rte_eth_dev *dev)
}
/**
+ * Change the link state (UP / DOWN).
+ *
+ * @param priv
+ * Pointer to Ethernet device private data.
+ * @param up
+ * Nonzero for link up, otherwise link down.
+ *
+ * @return
+ * 0 on success, errno value on failure.
+ */
+static int
+priv_set_link(struct priv *priv, int up)
+{
+ struct rte_eth_dev *dev = priv->dev;
+ int err;
+ unsigned int i;
+
+ if (up) {
+ err = priv_set_flags(priv, ~IFF_UP, IFF_UP);
+ if (err)
+ return err;
+ for (i = 0; i < priv->rxqs_n; i++)
+ if ((*priv->rxqs)[i]->sp)
+ break;
+ /* Check if an sp queue exists.
+ * Note: Some old frames might be received.
+ */
+ if (i == priv->rxqs_n)
+ dev->rx_pkt_burst = mlx4_rx_burst;
+ else
+ dev->rx_pkt_burst = mlx4_rx_burst_sp;
+ dev->tx_pkt_burst = mlx4_tx_burst;
+ } else {
+ err = priv_set_flags(priv, ~IFF_UP, ~IFF_UP);
+ if (err)
+ return err;
+ dev->rx_pkt_burst = removed_rx_burst;
+ dev->tx_pkt_burst = removed_tx_burst;
+ }
+ return 0;
+}
+
+/**
+ * DPDK callback to bring the link DOWN.
+ *
+ * @param dev
+ * Pointer to Ethernet device structure.
+ *
+ * @return
+ * 0 on success, errno value on failure.
+ */
+static int
+mlx4_set_link_down(struct rte_eth_dev *dev)
+{
+ struct priv *priv = dev->data->dev_private;
+ int err;
+
+ priv_lock(priv);
+ err = priv_set_link(priv, 0);
+ priv_unlock(priv);
+ return err;
+}
+
+/**
+ * DPDK callback to bring the link UP.
+ *
+ * @param dev
+ * Pointer to Ethernet device structure.
+ *
+ * @return
+ * 0 on success, errno value on failure.
+ */
+static int
+mlx4_set_link_up(struct rte_eth_dev *dev)
+{
+ struct priv *priv = dev->data->dev_private;
+ int err;
+
+ priv_lock(priv);
+ err = priv_set_link(priv, 1);
+ priv_unlock(priv);
+ return err;
+}
+/**
* DPDK callback to get information about the device.
*
* @param dev
@@ -5134,6 +5218,8 @@ static const struct eth_dev_ops mlx4_dev_ops = {
.dev_configure = mlx4_dev_configure,
.dev_start = mlx4_dev_start,
.dev_stop = mlx4_dev_stop,
+ .dev_set_link_down = mlx4_set_link_down,
+ .dev_set_link_up = mlx4_set_link_up,
.dev_close = mlx4_dev_close,
.promiscuous_enable = mlx4_promiscuous_enable,
.promiscuous_disable = mlx4_promiscuous_disable,
--
2.8.1