[dpdk-dev] [PATCH] net/mlx4: use PCI address as port name

[Yuanhan Liu <yliu@fridaylinux.org>]

It is suggested to use PCI BDF to identify a port for port addition
in OVS-DPDK. While mlx5 has its own naming style: name it by ib dev
name. This breaks the typical OVS DPDK use case and brings more puzzle
to the end users.

To fix it, this patch changes it to use PCI BDF as the name, too.
Judging the fact that there are 2 ports associated with one PCI for
ConnectX-3, a postfix is needed. Thus, the final name looks like
something below:

    0000:04:00.0-port0
    0000:04:00.0-port1

Cc: stable@dpdk.org
Signed-off-by: Yuanhan Liu <yliu@fridaylinux.org>
---
 drivers/net/mlx4/mlx4.c | 17 +++++++++--------
 1 file changed, 9 insertions(+), 8 deletions(-)

diff --git a/drivers/net/mlx4/mlx4.c b/drivers/net/mlx4/mlx4.c
index ee93daf..eb8851c 100644
--- a/drivers/net/mlx4/mlx4.c
+++ b/drivers/net/mlx4/mlx4.c
@@ -497,6 +497,14 @@ mlx4_pci_probe(struct rte_pci_driver *pci_drv, struct rte_pci_device *pci_dev)
 		struct priv *priv = NULL;
 		struct rte_eth_dev *eth_dev = NULL;
 		struct ether_addr mac;
+		char name[RTE_ETH_NAME_MAX_LEN];
+		int len;
+
+		len = snprintf(name, sizeof(name), PCI_PRI_FMT,
+			 pci_dev->addr.domain, pci_dev->addr.bus,
+			 pci_dev->addr.devid, pci_dev->addr.function);
+		if (device_attr.phys_port_cnt > 1)
+			snprintf(name + len, sizeof(name), "-port%u", i);
 
 		/* If port is not enabled, skip. */
 		if (!(conf.ports.enabled & (1 << i)))
@@ -605,14 +613,7 @@ mlx4_pci_probe(struct rte_pci_driver *pci_drv, struct rte_pci_device *pci_dev)
 		/* Get actual MTU if possible. */
 		mlx4_mtu_get(priv, &priv->mtu);
 		DEBUG("port %u MTU is %u", priv->port, priv->mtu);
-		/* from rte_ethdev.c */
-		{
-			char name[RTE_ETH_NAME_MAX_LEN];
-
-			snprintf(name, sizeof(name), "%s port %u",
-				 mlx4_glue->get_device_name(ibv_dev), port);
-			eth_dev = rte_eth_dev_allocate(name);
-		}
+		eth_dev = rte_eth_dev_allocate(name);
 		if (eth_dev == NULL) {
 			ERROR("can not allocate rte ethdev");
 			rte_errno = ENOMEM;
-- 
2.7.4