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IB/mlx5: Restore IB guid/policy for virtual functions 

When a user sets port_guid, node_guid or policy of an IB virtual
function, save this information in "struct mlx5_vf_context".

This information will be restored later when pci_resume is called.
To make sure this works, one can use aer-inject to generate PCI
errors on mlx5 devices and verify if relevant fields are restored
after PCI resume.

Signed-off-by: Bodong Wang <bodong@mellanox.com>
Reviewed-by: Eli Cohen <eli@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Bodong Wang 2017-05-30 10:18:24 +03:00 committed by Doug Ledford
parent 4a2da0b8c0
commit 7ecf6d8ff1
3 changed files with 61 additions and 7 deletions
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9
drivers/infiniband/hw/mlx5/ib_virt.c
View File

@ -96,6 +96,7 @@ int mlx5_ib_set_vf_link_state(struct ib_device *device, int vf,
struct mlx5_ib_dev *dev = to_mdev(device);
struct mlx5_core_dev *mdev = dev->mdev;
struct mlx5_hca_vport_context *in;
struct mlx5_vf_context *vfs_ctx = mdev->priv.sriov.vfs_ctx;
int err;
in = kzalloc(sizeof(*in), GFP_KERNEL);
@ -109,6 +110,8 @@ int mlx5_ib_set_vf_link_state(struct ib_device *device, int vf,
}
in->field_select = MLX5_HCA_VPORT_SEL_STATE_POLICY;
err = mlx5_core_modify_hca_vport_context(mdev, 1, 1, vf + 1, in);
if (!err)
vfs_ctx[vf].policy = in->policy;
out:
kfree(in);
@ -151,6 +154,7 @@ static int set_vf_node_guid(struct ib_device *device, int vf, u8 port, u64 guid)
struct mlx5_ib_dev *dev = to_mdev(device);
struct mlx5_core_dev *mdev = dev->mdev;
struct mlx5_hca_vport_context *in;
struct mlx5_vf_context *vfs_ctx = mdev->priv.sriov.vfs_ctx;
int err;
in = kzalloc(sizeof(*in), GFP_KERNEL);
@ -160,6 +164,8 @@ static int set_vf_node_guid(struct ib_device *device, int vf, u8 port, u64 guid)
in->field_select = MLX5_HCA_VPORT_SEL_NODE_GUID;
in->node_guid = guid;
err = mlx5_core_modify_hca_vport_context(mdev, 1, 1, vf + 1, in);
if (!err)
vfs_ctx[vf].node_guid = guid;
kfree(in);
return err;
}
@ -169,6 +175,7 @@ static int set_vf_port_guid(struct ib_device *device, int vf, u8 port, u64 guid)
struct mlx5_ib_dev *dev = to_mdev(device);
struct mlx5_core_dev *mdev = dev->mdev;
struct mlx5_hca_vport_context *in;
struct mlx5_vf_context *vfs_ctx = mdev->priv.sriov.vfs_ctx;
int err;
in = kzalloc(sizeof(*in), GFP_KERNEL);
@ -178,6 +185,8 @@ static int set_vf_port_guid(struct ib_device *device, int vf, u8 port, u64 guid)
in->field_select = MLX5_HCA_VPORT_SEL_PORT_GUID;
in->port_guid = guid;
err = mlx5_core_modify_hca_vport_context(mdev, 1, 1, vf + 1, in);
if (!err)
vfs_ctx[vf].port_guid = guid;
kfree(in);
return err;
}

42
drivers/net/ethernet/mellanox/mlx5/core/sriov.c
View File

@ -32,6 +32,7 @@
#include <linux/pci.h>
#include <linux/mlx5/driver.h>
#include <linux/mlx5/vport.h>
#include "mlx5_core.h"
#ifdef CONFIG_MLX5_CORE_EN
#include "eswitch.h"
@ -44,6 +45,38 @@ bool mlx5_sriov_is_enabled(struct mlx5_core_dev *dev)
return !!sriov->num_vfs;
}
static int sriov_restore_guids(struct mlx5_core_dev *dev, int vf)
{
struct mlx5_core_sriov *sriov = &dev->priv.sriov;
struct mlx5_hca_vport_context *in;
int err = 0;
/* Restore sriov guid and policy settings */
if (sriov->vfs_ctx[vf].node_guid ||
sriov->vfs_ctx[vf].port_guid ||
sriov->vfs_ctx[vf].policy != MLX5_POLICY_INVALID) {
in = kzalloc(sizeof(*in), GFP_KERNEL);
if (!in)
return -ENOMEM;
in->node_guid = sriov->vfs_ctx[vf].node_guid;
in->port_guid = sriov->vfs_ctx[vf].port_guid;
in->policy = sriov->vfs_ctx[vf].policy;
in->field_select =
!!(in->port_guid) * MLX5_HCA_VPORT_SEL_PORT_GUID |
!!(in->node_guid) * MLX5_HCA_VPORT_SEL_NODE_GUID |
!!(in->policy) * MLX5_HCA_VPORT_SEL_STATE_POLICY;
err = mlx5_core_modify_hca_vport_context(dev, 1, 1, vf + 1, in);
if (err)
mlx5_core_warn(dev, "modify vport context failed, unable to restore VF %d settings\n", vf);
kfree(in);
}
return err;
}
static int mlx5_device_enable_sriov(struct mlx5_core_dev *dev, int num_vfs)
{
struct mlx5_core_sriov *sriov = &dev->priv.sriov;
@ -74,6 +107,15 @@ static int mlx5_device_enable_sriov(struct mlx5_core_dev *dev, int num_vfs)
}
sriov->vfs_ctx[vf].enabled = 1;
sriov->enabled_vfs++;
if (MLX5_CAP_GEN(dev, port_type) == MLX5_CAP_PORT_TYPE_IB) {
err = sriov_restore_guids(dev, vf);
if (err) {
mlx5_core_warn(dev,
"failed to restore VF %d settings, err %d\n",
vf, err);
continue;
}
}
mlx5_core_dbg(dev, "successfully enabled VF* %d\n", vf);
}

17
include/linux/mlx5/driver.h
View File

@ -162,6 +162,13 @@ enum dbg_rsc_type {
MLX5_DBG_RSC_CQ,
};
enum port_state_policy {
MLX5_POLICY_DOWN = 0,
MLX5_POLICY_UP = 1,
MLX5_POLICY_FOLLOW = 2,
MLX5_POLICY_INVALID = 0xffffffff
};
struct mlx5_field_desc {
struct dentry *dent;
int i;
@ -525,6 +532,9 @@ struct mlx5_mkey_table {
struct mlx5_vf_context {
int enabled;
u64 port_guid;
u64 node_guid;
enum port_state_policy policy;
};
struct mlx5_core_sriov {
@ -842,13 +852,6 @@ struct mlx5_pas {
u8 log_sz;
};
enum port_state_policy {
MLX5_POLICY_DOWN = 0,
MLX5_POLICY_UP = 1,
MLX5_POLICY_FOLLOW = 2,
MLX5_POLICY_INVALID = 0xffffffff
};
enum phy_port_state {
MLX5_AAA_111
};