net/mlx5: E-Switch, Add SR-IOV (FDB) support

Enabling E-Switch SRIOV for nvfs+1 vports.

Create E-Switch FDB for L2 UC/MC mac steering between VFs/PF and
external vport (Uplink).

FDB contains forwarding rules such as:
	UC MAC0 -> vport0(PF).
	UC MAC1 -> vport1.
	UC MAC2 -> vport2.
	MC MACX -> vport0, vport2, Uplink.
	MC MACY -> vport1, Uplink.

For unmatched traffic FDB has the following default rules:
	Unmached Traffic (src vport != Uplink) -> Uplink.
	Unmached Traffic (src vport == Uplink) -> vport0(PF).

FDB rules population:
Each NIC vport (VF) will notify E-Switch manager of its UC/MC vport
context changes via modify vport context command, which will be
translated to an event that will be handled by E-Switch manager (PF)
which will update FDB table accordingly.

Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 13 insertions, 1 deletions

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/sriov.c b/drivers/net/ethernet/mellanox/mlx5/core/sriov.c
index 19a4324..7b24386 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/sriov.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/sriov.c
@@ -33,6 +33,9 @@
 #include <linux/pci.h>
 #include <linux/mlx5/driver.h>
 #include "mlx5_core.h"
+#ifdef CONFIG_MLX5_CORE_EN
+#include "eswitch.h"
+#endif
 
 static void enable_vfs(struct mlx5_core_dev *dev, int num_vfs)
 {
@@ -144,13 +147,15 @@ int mlx5_core_sriov_configure(struct pci_dev *pdev, int num_vfs)
 	mlx5_core_cleanup_vfs(dev);
 
 	if (!num_vfs) {
+#ifdef CONFIG_MLX5_CORE_EN
+		mlx5_eswitch_disable_sriov(dev->priv.eswitch);
+#endif
 		kfree(sriov->vfs_ctx);
 		sriov->vfs_ctx = NULL;
 		if (!pci_vfs_assigned(pdev))
 			pci_disable_sriov(pdev);
 		else
 			pr_info("unloading PF driver while leaving orphan VFs\n");
-
 		return 0;
 	}
 
@@ -161,6 +166,9 @@ int mlx5_core_sriov_configure(struct pci_dev *pdev, int num_vfs)
 	}
 
 	mlx5_core_init_vfs(dev, num_vfs);
+#ifdef CONFIG_MLX5_CORE_EN
+	mlx5_eswitch_enable_sriov(dev->priv.eswitch, num_vfs);
+#endif
 
 	return num_vfs;
 }
@@ -199,6 +207,10 @@ int mlx5_sriov_init(struct mlx5_core_dev *dev)
 	sriov->enabled_vfs = cur_vfs;
 
 	mlx5_core_init_vfs(dev, cur_vfs);
+#ifdef CONFIG_MLX5_CORE_EN
+	if (cur_vfs)
+		mlx5_eswitch_enable_sriov(dev->priv.eswitch, cur_vfs);
+#endif
 
 	enable_vfs(dev, cur_vfs);