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net/mlx5: Implement SRIOV attach/detach flows

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Needed for lightweight and modular internal/pci error handling.
Implement sriov attach function which enables pre-saved number of vfs on
the device side.
Implement sriov detach function which disable the current vfs on the
device side.
Init/cleanup function only handles sriov software context allocation and
destruction.

Signed-off-by: Mohamad Haj Yahia <mohamad@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Mohamad Haj Yahia 2016-09-09 17:35:21 +03:00 committed by David S. Miller
parent 59211bd3b6
commit acab721b5d
2 changed files with 23 additions and 8 deletions
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2
drivers/net/ethernet/mellanox/mlx5/core/mlx5_core.h
View file

@ -91,6 +91,8 @@ void mlx5_enter_error_state(struct mlx5_core_dev *dev);
void mlx5_disable_device(struct mlx5_core_dev *dev);
int mlx5_sriov_init(struct mlx5_core_dev *dev);
void mlx5_sriov_cleanup(struct mlx5_core_dev *dev);
int mlx5_sriov_attach(struct mlx5_core_dev *dev);
void mlx5_sriov_detach(struct mlx5_core_dev *dev);
int mlx5_core_sriov_configure(struct pci_dev *dev, int num_vfs);
bool mlx5_sriov_is_enabled(struct mlx5_core_dev *dev);
int mlx5_core_enable_hca(struct mlx5_core_dev *dev, u16 func_id);

29
drivers/net/ethernet/mellanox/mlx5/core/sriov.c
View file

@ -188,6 +188,25 @@ int mlx5_core_sriov_configure(struct pci_dev *pdev, int num_vfs)
return err ? err : num_vfs;
}
int mlx5_sriov_attach(struct mlx5_core_dev *dev)
{
struct mlx5_core_sriov *sriov = &dev->priv.sriov;
if (!mlx5_core_is_pf(dev) || !sriov->num_vfs)
return 0;
/* If sriov VFs exist in PCI level, enable them in device level */
return mlx5_device_enable_sriov(dev, sriov->num_vfs);
}
void mlx5_sriov_detach(struct mlx5_core_dev *dev)
{
if (!mlx5_core_is_pf(dev))
return;
mlx5_device_disable_sriov(dev);
}
int mlx5_sriov_init(struct mlx5_core_dev *dev)
{
struct mlx5_core_sriov *sriov = &dev->priv.sriov;
@ -203,12 +222,7 @@ int mlx5_sriov_init(struct mlx5_core_dev *dev)
if (!sriov->vfs_ctx)
return -ENOMEM;
/* If sriov VFs exist in PCI level, enable them in device level */
if (!sriov->num_vfs)
return 0;
mlx5_device_enable_sriov(dev, sriov->num_vfs);
return 0;
return mlx5_sriov_attach(dev);
}
void mlx5_sriov_cleanup(struct mlx5_core_dev *dev)
@ -217,7 +231,6 @@ void mlx5_sriov_cleanup(struct mlx5_core_dev *dev)
if (!mlx5_core_is_pf(dev))
return;
mlx5_device_disable_sriov(dev);
mlx5_sriov_detach(dev);
kfree(sriov->vfs_ctx);
}