This patch implements checking if Multiport E-Switch is enabled
on a given PCI device. mlx5_is_mpesw_enabled() implements this
functionality and it will be used in a follow up commit.
mlx5_is_mpesw_enabled() first checks if E-Switch state can be probed
using Devlink device parameter. If it cannot be checked or
there was an error, then sysfs interface will be probed.
If that fails, mlx5_is_mpesw_enabled() assumes that Multiport E-Switch
is disabled and returns an error.
Signed-off-by: Dariusz Sosnowski <dsosnow...@nvidia.com>
Acked-by: Viacheslav Ovsiienko <viachesl...@nvidia.com>
---
drivers/net/mlx5/linux/mlx5_os.c | 51 +++++++++++++++++++++++++++++++-
1 file changed, 50 insertions(+), 1 deletion(-)
diff --git a/drivers/net/mlx5/linux/mlx5_os.c b/drivers/net/mlx5/linux/mlx5_os.c
index 7a656a7237..8a57edc470 100644
--- a/drivers/net/mlx5/linux/mlx5_os.c
+++ b/drivers/net/mlx5/linux/mlx5_os.c
@@ -1931,9 +1931,38 @@ mlx5_device_bond_pci_match(const char *ibdev_name,
return pf;
}
+static int
+mlx5_nl_esw_multiport_get(struct rte_pci_addr *pci_addr, int *enabled)
+{
+ char pci_addr_str[PCI_PRI_STR_SIZE] = { 0 };
+ int nlsk_fd;
+ int devlink_id;
+ int ret;
+
+ /* Provide correct value to have defined enabled state in case of an
error. */
+ *enabled = 0;
+ rte_pci_device_name(pci_addr, pci_addr_str, sizeof(pci_addr_str));
+ nlsk_fd = mlx5_nl_init(NETLINK_GENERIC, 0);
+ if (nlsk_fd < 0)
+ return nlsk_fd;
+ devlink_id = mlx5_nl_devlink_family_id_get(nlsk_fd);
+ if (devlink_id < 0) {
+ ret = devlink_id;
+ DRV_LOG(DEBUG, "Unable to get devlink family id for Multiport
E-Switch checks "
+ "by netlink, for PCI device %s", pci_addr_str);
+ goto close_nlsk_fd;
+ }
+ ret = mlx5_nl_devlink_esw_multiport_get(nlsk_fd, devlink_id,
pci_addr_str, enabled);
+ if (ret < 0)
+ DRV_LOG(DEBUG, "Unable to get Multiport E-Switch state by
Netlink.");
+close_nlsk_fd:
+ close(nlsk_fd);
+ return ret;
+}
+
#define SYSFS_MPESW_PARAM_MAX_LEN 16
-static __rte_unused int
+static int
mlx5_sysfs_esw_multiport_get(struct ibv_device *ibv, struct rte_pci_addr
*pci_addr, int *enabled)
{
int nl_rdma;
@@ -2000,6 +2029,26 @@ mlx5_sysfs_esw_multiport_get(struct ibv_device *ibv,
struct rte_pci_addr *pci_ad
return ret;
}
+static __rte_unused int
+mlx5_is_mpesw_enabled(struct ibv_device *ibv, struct rte_pci_addr
*ibv_pci_addr, int *enabled)
+{
+ /*
+ * Try getting Multiport E-Switch state through netlink interface
+ * If unable, try sysfs interface. If that is unable as well,
+ * assume that Multiport E-Switch is disabled and return an error.
+ */
+ if (mlx5_nl_esw_multiport_get(ibv_pci_addr, enabled) >= 0 ||
+ mlx5_sysfs_esw_multiport_get(ibv, ibv_pci_addr, enabled) >= 0)
+ return 0;
+ DRV_LOG(DEBUG, "Unable to check MPESW state for IB device %s "
+ "(PCI: " PCI_PRI_FMT ")",
+ ibv->name,
+ ibv_pci_addr->domain, ibv_pci_addr->bus,
+ ibv_pci_addr->devid, ibv_pci_addr->function);
+ *enabled = 0;
+ return -rte_errno;
+}
+
/**
* Register a PCI device within bonding.
*
--
2.25.1
