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vdpa/mlx5: Add debugfs subtree

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Add debugfs subtree and expose flow table ID and TIR number. This
information can be used by external tools to do extended
troubleshooting.

The information can be retrieved like so:
$ cat /sys/kernel/debug/mlx5/mlx5_core.sf.1/vdpa-0/rx/table_id
$ cat /sys/kernel/debug/mlx5/mlx5_core.sf.1/vdpa-0/rx/tirn

Reviewed-by: Si-Wei Liu <si-wei.liu@oracle.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Eli Cohen <elic@nvidia.com>
Message-Id: <20221114131759.57883-8-elic@nvidia.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Eli Cohen 2022-11-14 15:17:58 +02:00 committed by Michael S. Tsirkin
parent 72c67e9b90
commit 2942210043
4 changed files with 87 additions and 1 deletions
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2
drivers/vdpa/mlx5/Makefile
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@ -1,4 +1,4 @@
subdir-ccflags-y += -I$(srctree)/drivers/vdpa/mlx5/core
obj-$(CONFIG_MLX5_VDPA_NET) += mlx5_vdpa.o
mlx5_vdpa-$(CONFIG_MLX5_VDPA_NET) += net/mlx5_vnet.o core/resources.o core/mr.o
mlx5_vdpa-$(CONFIG_MLX5_VDPA_NET) += net/mlx5_vnet.o core/resources.o core/mr.o net/debug.o

66
drivers/vdpa/mlx5/net/debug.c Normal file
View File

@ -0,0 +1,66 @@
// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
/* Copyright (c) 2022, NVIDIA CORPORATION & AFFILIATES. All rights reserved. */
#include <linux/debugfs.h>
#include <linux/mlx5/fs.h>
#include "mlx5_vnet.h"
static int tirn_show(struct seq_file *file, void *priv)
{
struct mlx5_vdpa_net *ndev = file->private;
seq_printf(file, "0x%x\n", ndev->res.tirn);
return 0;
}
DEFINE_SHOW_ATTRIBUTE(tirn);
void mlx5_vdpa_remove_tirn(struct mlx5_vdpa_net *ndev)
{
if (ndev->debugfs)
debugfs_remove(ndev->res.tirn_dent);
}
void mlx5_vdpa_add_tirn(struct mlx5_vdpa_net *ndev)
{
ndev->res.tirn_dent = debugfs_create_file("tirn", 0444, ndev->rx_dent,
ndev, &tirn_fops);
}
static int rx_flow_table_show(struct seq_file *file, void *priv)
{
struct mlx5_vdpa_net *ndev = file->private;
seq_printf(file, "0x%x\n", mlx5_flow_table_id(ndev->rxft));
return 0;
}
DEFINE_SHOW_ATTRIBUTE(rx_flow_table);
void mlx5_vdpa_remove_rx_flow_table(struct mlx5_vdpa_net *ndev)
{
if (ndev->debugfs)
debugfs_remove(ndev->rx_table_dent);
}
void mlx5_vdpa_add_rx_flow_table(struct mlx5_vdpa_net *ndev)
{
ndev->rx_table_dent = debugfs_create_file("table_id", 0444, ndev->rx_dent,
ndev, &rx_flow_table_fops);
}
void mlx5_vdpa_add_debugfs(struct mlx5_vdpa_net *ndev)
{
struct mlx5_core_dev *mdev;
mdev = ndev->mvdev.mdev;
ndev->debugfs = debugfs_create_dir(dev_name(&ndev->mvdev.vdev.dev),
mlx5_debugfs_get_dev_root(mdev));
if (!IS_ERR(ndev->debugfs))
ndev->rx_dent = debugfs_create_dir("rx", ndev->debugfs);
}
void mlx5_vdpa_remove_debugfs(struct dentry *dbg)
{
debugfs_remove_recursive(dbg);
}

11
drivers/vdpa/mlx5/net/mlx5_vnet.c
View File

@ -1388,11 +1388,16 @@ static int create_tir(struct mlx5_vdpa_net *ndev)
err = mlx5_vdpa_create_tir(&ndev->mvdev, in, &ndev->res.tirn);
kfree(in);
if (err)
return err;
mlx5_vdpa_add_tirn(ndev);
return err;
}
static void destroy_tir(struct mlx5_vdpa_net *ndev)
{
mlx5_vdpa_remove_tirn(ndev);
mlx5_vdpa_destroy_tir(&ndev->mvdev, ndev->res.tirn);
}
@ -1578,6 +1583,7 @@ static int setup_steering(struct mlx5_vdpa_net *ndev)
mlx5_vdpa_warn(&ndev->mvdev, "failed to create flow table\n");
return PTR_ERR(ndev->rxft);
}
mlx5_vdpa_add_rx_flow_table(ndev);
err = mac_vlan_add(ndev, ndev->config.mac, 0, false);
if (err)
@ -1586,6 +1592,7 @@ static int setup_steering(struct mlx5_vdpa_net *ndev)
return 0;
err_add:
mlx5_vdpa_remove_rx_flow_table(ndev);
mlx5_destroy_flow_table(ndev->rxft);
return err;
}
@ -1593,6 +1600,7 @@ err_add:
static void teardown_steering(struct mlx5_vdpa_net *ndev)
{
clear_mac_vlan_table(ndev);
mlx5_vdpa_remove_rx_flow_table(ndev);
mlx5_destroy_flow_table(ndev->rxft);
}
@ -3135,6 +3143,7 @@ static int mlx5_vdpa_dev_add(struct vdpa_mgmt_dev *v_mdev, const char *name,
if (err)
goto err_reg;
mlx5_vdpa_add_debugfs(ndev);
mgtdev->ndev = ndev;
return 0;
@ -3161,6 +3170,8 @@ static void mlx5_vdpa_dev_del(struct vdpa_mgmt_dev *v_mdev, struct vdpa_device *
struct mlx5_vdpa_net *ndev = to_mlx5_vdpa_ndev(mvdev);
struct workqueue_struct *wq;
mlx5_vdpa_remove_debugfs(ndev->debugfs);
ndev->debugfs = NULL;
if (ndev->nb_registered) {
ndev->nb_registered = false;
mlx5_notifier_unregister(mvdev->mdev, &ndev->nb);

9
drivers/vdpa/mlx5/net/mlx5_vnet.h
View File

@ -16,6 +16,7 @@ struct mlx5_vdpa_net_resources {
u32 tirn;
u32 rqtn;
bool valid;
struct dentry *tirn_dent;
};
#define MLX5V_MACVLAN_SIZE 256
@ -43,6 +44,7 @@ struct mlx5_vdpa_net {
struct vdpa_callback config_cb;
struct mlx5_vdpa_wq_ent cvq_ent;
struct hlist_head macvlan_hash[MLX5V_MACVLAN_SIZE];
struct dentry *debugfs;
};
struct macvlan_node {
@ -52,4 +54,11 @@ struct macvlan_node {
u64 macvlan;
};
void mlx5_vdpa_add_debugfs(struct mlx5_vdpa_net *ndev);
void mlx5_vdpa_remove_debugfs(struct dentry *dbg);
void mlx5_vdpa_add_rx_flow_table(struct mlx5_vdpa_net *ndev);
void mlx5_vdpa_remove_rx_flow_table(struct mlx5_vdpa_net *ndev);
void mlx5_vdpa_add_tirn(struct mlx5_vdpa_net *ndev);
void mlx5_vdpa_remove_tirn(struct mlx5_vdpa_net *ndev);
#endif /* __MLX5_VNET_H__ */