net/mlx5: fix host physical function representor naming

The new kernel adds the names like "pf0" for Host PCI physical
function representor on Bluefield SmartNIC hosts. This patch
provides correct HPF representor recognition over the kernel
versions 5.7 and laters.

The following port naming formats are supported:

  - missing physical port name (no sysfs/netlink key) at all,
    master is assumed

  - decimal digits (for example "12"), representor is
    assumed, the value is the index of attached VF

  - "p" followed by decimal digits, for example "p2", master
    is assumed

  - "pf" followed by PF index, for example "pf0", Host PF
     representor is assumed on SmartNIC systems.

  - "pf" followed by PF index concatenated with "vf" followed by
     VF index, for example "pf0vf1", representor is assumed.
     If index of VF is "-1" it is a special case of Host PF
     representor, this representor must be indexed in devargs
     as 65535, for example representor=[0-3,65535] will
     allow representors for VF0, VF1, VF2, VF3 and for host PF.

Fixes: 79aa430721b1 ("common/mlx5: split common file under Linux directory")
Cc: stable@dpdk.org
Signed-off-by: Viacheslav Ovsiienko <viacheslavo@mellanox.com>
Acked-by: Matan Azrad <matan@mellanox.com>

diff --git a/drivers/common/mlx5/linux/mlx5_common_os.c b/drivers/common/mlx5/linux/mlx5_common_os.c
index 5a54875..e422e95 100644 (file)
--- a/drivers/common/mlx5/linux/mlx5_common_os.c
+++ b/drivers/common/mlx5/linux/mlx5_common_os.c
@@ -117,6 +117,17 @@ mlx5_translate_port_name(const char *port_name_in,
                port_info_out->name_type = MLX5_PHYS_PORT_NAME_TYPE_UPLINK;
                return;
        }
+       /*
+        * Check for port-name as a string of the form pf0
+        * (support kernel ver >= 5.7 for HPF representor on BF).
+        */
+       sc_items = sscanf(port_name_in, "%c%c%d",
+                         &pf_c1, &pf_c2, &port_info_out->pf_num);
+       if (sc_items == 3 && pf_c1 == 'p' && pf_c2 == 'f') {
+               port_info_out->port_name = -1;
+               port_info_out->name_type = MLX5_PHYS_PORT_NAME_TYPE_PFHPF;
+               return;
+       }
        /* Check for port-name as a number (support kernel ver < 5.0 */
        errno = 0;
        port_info_out->port_name = strtol(port_name_in, &end, 0);

diff --git a/drivers/common/mlx5/linux/mlx5_nl.c b/drivers/common/mlx5/linux/mlx5_nl.c
index 2943704..dc504d8 100644 (file)
--- a/drivers/common/mlx5/linux/mlx5_nl.c
+++ b/drivers/common/mlx5/linux/mlx5_nl.c
@@ -1145,6 +1145,8 @@ mlx5_nl_check_switch_info(bool num_vf_set,
                /* Legacy representors naming schema. */
                switch_info->representor = !num_vf_set;
                break;
+       case MLX5_PHYS_PORT_NAME_TYPE_PFHPF:
+               /* Fallthrough */
        case MLX5_PHYS_PORT_NAME_TYPE_PFVF:
                /* New representors naming schema. */
                switch_info->representor = 1;

diff --git a/drivers/common/mlx5/mlx5_common.h b/drivers/common/mlx5/mlx5_common.h
index a82956b..da01ffa 100644 (file)
--- a/drivers/common/mlx5/mlx5_common.h
+++ b/drivers/common/mlx5/mlx5_common.h
@@ -146,6 +146,7 @@ enum mlx5_nl_phys_port_name_type {
        MLX5_PHYS_PORT_NAME_TYPE_LEGACY, /* before kernel ver < 5.0 */
        MLX5_PHYS_PORT_NAME_TYPE_UPLINK, /* p0, kernel ver >= 5.0 */
        MLX5_PHYS_PORT_NAME_TYPE_PFVF, /* pf0vf0, kernel ver >= 5.0 */
+       MLX5_PHYS_PORT_NAME_TYPE_PFHPF, /* pf0, kernel ver >= 5.7, HPF rep */
        MLX5_PHYS_PORT_NAME_TYPE_UNKNOWN, /* Unrecognized. */
 };
 

diff --git a/drivers/net/mlx5/linux/mlx5_ethdev_os.c b/drivers/net/mlx5/linux/mlx5_ethdev_os.c
index 21105f6..701614a 100644 (file)
--- a/drivers/net/mlx5/linux/mlx5_ethdev_os.c
+++ b/drivers/net/mlx5/linux/mlx5_ethdev_os.c
@@ -1091,6 +1091,8 @@ mlx5_sysfs_check_switch_info(bool device_dir,
                /* Legacy representors naming schema. */
                switch_info->representor = !device_dir;
                break;
+       case MLX5_PHYS_PORT_NAME_TYPE_PFHPF:
+               /* Fallthrough */
        case MLX5_PHYS_PORT_NAME_TYPE_PFVF:
                /* New representors naming schema. */
                switch_info->representor = 1;

diff --git a/drivers/net/mlx5/linux/mlx5_os.c b/drivers/net/mlx5/linux/mlx5_os.c
index c851d82..f0147e6 100644 (file)
--- a/drivers/net/mlx5/linux/mlx5_os.c
+++ b/drivers/net/mlx5/linux/mlx5_os.c
@@ -1491,6 +1491,8 @@ mlx5_os_pci_probe(struct rte_pci_driver *pci_drv __rte_unused,
                                        if (list[ns].info.port_name == bd)
                                                ns++;
                                        break;
+                               case MLX5_PHYS_PORT_NAME_TYPE_PFHPF:
+                                       /* Fallthrough */
                                case MLX5_PHYS_PORT_NAME_TYPE_PFVF:
                                        if (list[ns].info.pf_num == bd)
                                                ns++;