On systems where the required Netlink commands are not supported but
Mellanox OFED is installed, representors information must be retrieved
through sysfs.
Fixes: 4c10141488fe ("net/mlx5: add port representor awareness")
Signed-off-by: Nelio Laranjeiro <nelio.laranje...@6wind.com>
Acked-by: Adrien Mazarguil <adrien.mazarg...@6wind.com>
---
drivers/net/mlx5/mlx5.c | 7 +++--
drivers/net/mlx5/mlx5.h | 2 ++
drivers/net/mlx5/mlx5_ethdev.c | 53 ++++++++++++++++++++++++++++++++++
3 files changed, 60 insertions(+), 2 deletions(-)
diff --git a/drivers/net/mlx5/mlx5.c b/drivers/net/mlx5/mlx5.c
index df7f39844..8174947f3 100644
--- a/drivers/net/mlx5/mlx5.c
+++ b/drivers/net/mlx5/mlx5.c
@@ -1306,7 +1306,8 @@ mlx5_pci_probe(struct rte_pci_driver *pci_drv
__rte_unused,
* Netlink calls assuming kernel drivers are recent enough to
* support them.
*
- * In the event of identification failure through Netlink, either:
+ * In the event of identification failure through Netlink, try again
+ * through sysfs, then either:
*
* 1. No device matches (n == 0), complain and bail out.
* 2. A single IB device matches (n == 1) and is not a representor,
@@ -1325,7 +1326,9 @@ mlx5_pci_probe(struct rte_pci_driver *pci_drv
__rte_unused,
if (nl_route < 0 ||
!list[i].ifindex ||
mlx5_nl_switch_info(nl_route, list[i].ifindex,
- &list[i].info)) {
+ &list[i].info) ||
+ ((!list[i].info.representor && !list[i].info.master) &&
+ mlx5_sysfs_switch_info(list[i].ifindex, &list[i].info))) {
list[i].ifindex = 0;
memset(&list[i].info, 0, sizeof(list[i].info));
continue;
diff --git a/drivers/net/mlx5/mlx5.h b/drivers/net/mlx5/mlx5.h
index cc01310e0..fff88b1d6 100644
--- a/drivers/net/mlx5/mlx5.h
+++ b/drivers/net/mlx5/mlx5.h
@@ -254,6 +254,8 @@ eth_rx_burst_t mlx5_select_rx_function(struct rte_eth_dev
*dev);
unsigned int mlx5_dev_to_port_id(const struct rte_device *dev,
uint16_t *port_list,
unsigned int port_list_n);
+int mlx5_sysfs_switch_info(unsigned int ifindex,
+ struct mlx5_switch_info *info);
/* mlx5_mac.c */
diff --git a/drivers/net/mlx5/mlx5_ethdev.c b/drivers/net/mlx5/mlx5_ethdev.c
index 05f66f7b6..101be4791 100644
--- a/drivers/net/mlx5/mlx5_ethdev.c
+++ b/drivers/net/mlx5/mlx5_ethdev.c
@@ -1296,3 +1296,56 @@ mlx5_dev_to_port_id(const struct rte_device *dev,
uint16_t *port_list,
}
return n;
}
+
+/**
+ * Get switch information associated with network interface.
+ *
+ * @param ifindex
+ * Network interface index.
+ * @param[out] info
+ * Switch information object, populated in case of success.
+ *
+ * @return
+ * 0 on success, a negative errno value otherwise and rte_errno is set.
+ */
+int
+mlx5_sysfs_switch_info(unsigned int ifindex, struct mlx5_switch_info *info)
+{
+ char ifname[IF_NAMESIZE];
+ FILE *file;
+ struct mlx5_switch_info data = { .master = 0, };
+ bool port_name_set = false;
+ bool port_switch_id_set = false;
+ char c;
+
+ if (!if_indextoname(ifindex, ifname)) {
+ rte_errno = errno;
+ return -rte_errno;
+ }
+
+ MKSTR(phys_port_name, "/sys/class/net/%s/phys_port_name",
+ ifname);
+ MKSTR(phys_switch_id, "/sys/class/net/%s/phys_switch_id",
+ ifname);
+
+ file = fopen(phys_port_name, "rb");
+ if (file == NULL)
+ goto error;
+ port_name_set = fscanf(file, "%d%c", &data.port_name, &c) == 2 &&
+ c == '\n';
+ fclose(file);
+ file = fopen(phys_switch_id, "rb");
+ if (file == NULL)
+ goto error;
+ port_switch_id_set =
+ fscanf(file, "%" SCNx64 "%c", &data.switch_id, &c) == 2 &&
+ c == '\n';
+ fclose(file);
+ data.master = port_switch_id_set && !port_name_set;
+ data.representor = port_switch_id_set && port_name_set;
+ *info = data;
+ return 0;
+error:
+ rte_errno = errno;
+ return -rte_errno;
+}
--
2.18.0
