[dpdk-stable] [PATCH 17.11] net/mlx5: use PCI address as port name

[Yuanhan Liu <yliu@fridaylinux.org>]

[ backported from upstream commit ad831a1176538f726428ebfe70f6607d7d854197 ]

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.
Also, a postfix " port %u" is added, just in case their might be more
than 1 port associated with a PCI device.

Signed-off-by: Yuanhan Liu <yliu@fridaylinux.org>
Acked-by: Nelio Laranjeiro <nelio.laranjeiro@6wind.com>
---
 drivers/net/mlx5/mlx5.c | 20 +++++++-------------
 1 file changed, 7 insertions(+), 13 deletions(-)

diff --git a/drivers/net/mlx5/mlx5.c b/drivers/net/mlx5/mlx5.c
index a5eb3fd..912e53c 100644
--- a/drivers/net/mlx5/mlx5.c
+++ b/drivers/net/mlx5/mlx5.c
@@ -662,6 +662,8 @@ mlx5_pci_probe(struct rte_pci_driver *pci_drv, struct rte_pci_device *pci_dev)
 	INFO("%u port(s) detected", device_attr.orig_attr.phys_port_cnt);
 
 	for (i = 0; i < device_attr.orig_attr.phys_port_cnt; i++) {
+		char name[RTE_ETH_NAME_MAX_LEN];
+		int len;
 		uint32_t port = i + 1; /* ports are indexed from one */
 		uint32_t test = (1 << i);
 		struct ibv_context *ctx = NULL;
@@ -685,14 +687,13 @@ mlx5_pci_probe(struct rte_pci_driver *pci_drv, struct rte_pci_device *pci_dev)
 			.rx_vec_en = MLX5_ARG_UNSET,
 		};
 
+		len = snprintf(name, sizeof(name), PCI_PRI_FMT,
+			 pci_dev->addr.domain, pci_dev->addr.bus,
+			 pci_dev->addr.devid, pci_dev->addr.function);
+
 		mlx5_dev[idx].ports |= test;
 
 		if (mlx5_is_secondary()) {
-			/* from rte_ethdev.c */
-			char name[RTE_ETH_NAME_MAX_LEN];
-
-			snprintf(name, sizeof(name), "%s port %u",
-				 ibv_get_device_name(ibv_dev), port);
 			eth_dev = rte_eth_dev_attach_secondary(name);
 			if (eth_dev == NULL) {
 				ERROR("can not attach rte ethdev");
@@ -902,14 +903,7 @@ mlx5_pci_probe(struct rte_pci_driver *pci_drv, struct rte_pci_device *pci_dev)
 		priv_get_mtu(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",
-				 ibv_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");
 			err = ENOMEM;
-- 
2.7.4