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{net,vdpa}/mlx5: Configure interface MAC into mpfs L2 table

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net/mlx5: Expose MPFS configuration API

MPFS is the multi physical function switch that bridges traffic between
the physical port and any physical functions associated with it. The
driver is required to add or remove MAC entries to properly forward
incoming traffic to the correct physical function.

We export the API to control MPFS so that other drivers, such as
mlx5_vdpa are able to add MAC addresses of their network interfaces.

The MAC address of the vdpa interface must be configured into the MPFS L2
address. Failing to do so could cause, in some NIC configurations, failure
to forward packets to the vdpa network device instance.

Fix this by adding calls to update the MPFS table.

CC: <mst@redhat.com>
CC: <jasowang@redhat.com>
CC: <virtualization@lists.linux-foundation.org>
Fixes: 1a86b377aa ("vdpa/mlx5: Add VDPA driver for supported mlx5 devices")
Signed-off-by: Eli Cohen <elic@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
This commit is contained in:
Eli Cohen 2021-04-22 15:48:10 +03:00 committed by Saeed Mahameed
parent 5e7923acbd
commit 7c9f131f36
6 changed files with 42 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/net/ethernet/mellanox/mlx5/core/en_fs.c
View File

@ -35,6 +35,7 @@
#include <linux/ipv6.h>
#include <linux/tcp.h>
#include <linux/mlx5/fs.h>
#include <linux/mlx5/mpfs.h>
#include "en.h"
#include "en_rep.h"
#include "lib/mpfs.h"

1
drivers/net/ethernet/mellanox/mlx5/core/eswitch.c
View File

@ -35,6 +35,7 @@
#include <linux/mlx5/mlx5_ifc.h>
#include <linux/mlx5/vport.h>
#include <linux/mlx5/fs.h>
#include <linux/mlx5/mpfs.h>
#include "esw/acl/lgcy.h"
#include "esw/legacy.h"
#include "mlx5_core.h"

3
drivers/net/ethernet/mellanox/mlx5/core/lib/mpfs.c
View File

@ -33,6 +33,7 @@
#include <linux/etherdevice.h>
#include <linux/mlx5/driver.h>
#include <linux/mlx5/mlx5_ifc.h>
#include <linux/mlx5/mpfs.h>
#include <linux/mlx5/eswitch.h>
#include "mlx5_core.h"
#include "lib/mpfs.h"
@ -175,6 +176,7 @@ out:
mutex_unlock(&mpfs->lock);
return err;
}
EXPORT_SYMBOL(mlx5_mpfs_add_mac);
int mlx5_mpfs_del_mac(struct mlx5_core_dev *dev, u8 *mac)
{
@ -206,3 +208,4 @@ unlock:
mutex_unlock(&mpfs->lock);
return err;
}
EXPORT_SYMBOL(mlx5_mpfs_del_mac);

5
drivers/net/ethernet/mellanox/mlx5/core/lib/mpfs.h
View File

@ -84,12 +84,9 @@ struct l2addr_node {
#ifdef CONFIG_MLX5_MPFS
int mlx5_mpfs_init(struct mlx5_core_dev *dev);
void mlx5_mpfs_cleanup(struct mlx5_core_dev *dev);
int mlx5_mpfs_add_mac(struct mlx5_core_dev *dev, u8 *mac);
int mlx5_mpfs_del_mac(struct mlx5_core_dev *dev, u8 *mac);
#else /* #ifndef CONFIG_MLX5_MPFS */
static inline int mlx5_mpfs_init(struct mlx5_core_dev *dev) { return 0; }
static inline void mlx5_mpfs_cleanup(struct mlx5_core_dev *dev) {}
static inline int mlx5_mpfs_add_mac(struct mlx5_core_dev *dev, u8 *mac) { return 0; }
static inline int mlx5_mpfs_del_mac(struct mlx5_core_dev *dev, u8 *mac) { return 0; }
#endif
#endif

19
drivers/vdpa/mlx5/net/mlx5_vnet.c
View File

@ -15,6 +15,7 @@
#include <linux/mlx5/vport.h>
#include <linux/mlx5/fs.h>
#include <linux/mlx5/mlx5_ifc_vdpa.h>
#include <linux/mlx5/mpfs.h>
#include "mlx5_vdpa.h"
MODULE_AUTHOR("Eli Cohen <eli@mellanox.com>");
@ -1859,11 +1860,16 @@ static int mlx5_vdpa_set_map(struct vdpa_device *vdev, struct vhost_iotlb *iotlb
static void mlx5_vdpa_free(struct vdpa_device *vdev)
{
struct mlx5_vdpa_dev *mvdev = to_mvdev(vdev);
struct mlx5_core_dev *pfmdev;
struct mlx5_vdpa_net *ndev;
ndev = to_mlx5_vdpa_ndev(mvdev);
free_resources(ndev);
if (!is_zero_ether_addr(ndev->config.mac)) {
pfmdev = pci_get_drvdata(pci_physfn(mvdev->mdev->pdev));
mlx5_mpfs_del_mac(pfmdev, ndev->config.mac);
}
mlx5_vdpa_free_resources(&ndev->mvdev);
mutex_destroy(&ndev->reslock);
}
@ -1990,6 +1996,7 @@ static int mlx5_vdpa_dev_add(struct vdpa_mgmt_dev *v_mdev, const char *name)
{
struct mlx5_vdpa_mgmtdev *mgtdev = container_of(v_mdev, struct mlx5_vdpa_mgmtdev, mgtdev);
struct virtio_net_config *config;
struct mlx5_core_dev *pfmdev;
struct mlx5_vdpa_dev *mvdev;
struct mlx5_vdpa_net *ndev;
struct mlx5_core_dev *mdev;
@ -2023,10 +2030,17 @@ static int mlx5_vdpa_dev_add(struct vdpa_mgmt_dev *v_mdev, const char *name)
if (err)
goto err_mtu;
if (!is_zero_ether_addr(config->mac)) {
pfmdev = pci_get_drvdata(pci_physfn(mdev->pdev));
err = mlx5_mpfs_add_mac(pfmdev, config->mac);
if (err)
goto err_mtu;
}
mvdev->vdev.dma_dev = mdev->device;
err = mlx5_vdpa_alloc_resources(&ndev->mvdev);
if (err)
goto err_mtu;
goto err_mpfs;
err = alloc_resources(ndev);
if (err)
@ -2044,6 +2058,9 @@ err_reg:
free_resources(ndev);
err_res:
mlx5_vdpa_free_resources(&ndev->mvdev);
err_mpfs:
if (!is_zero_ether_addr(config->mac))
mlx5_mpfs_del_mac(pfmdev, config->mac);
err_mtu:
mutex_destroy(&ndev->reslock);
put_device(&mvdev->vdev.dev);

18
include/linux/mlx5/mpfs.h Normal file
View File

@ -0,0 +1,18 @@
/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
* Copyright (c) 2021 Mellanox Technologies Ltd.
*/
#ifndef _MLX5_MPFS_
#define _MLX5_MPFS_
struct mlx5_core_dev;
#ifdef CONFIG_MLX5_MPFS
int mlx5_mpfs_add_mac(struct mlx5_core_dev *dev, u8 *mac);
int mlx5_mpfs_del_mac(struct mlx5_core_dev *dev, u8 *mac);
#else /* #ifndef CONFIG_MLX5_MPFS */
static inline int mlx5_mpfs_add_mac(struct mlx5_core_dev *dev, u8 *mac) { return 0; }
static inline int mlx5_mpfs_del_mac(struct mlx5_core_dev *dev, u8 *mac) { return 0; }
#endif
#endif