Commit e71b75f7 authored by Leon Romanovsky's avatar Leon Romanovsky
Browse files

net/mlx5: Implement sriov_get_vf_total_msix/count() callbacks 

The mlx5 implementation executes a firmware command on the PF to change
the configuration of the selected VF.

Link: https://lore.kernel.org/linux-pci/20210314124256.70253-5-leon@kernel.org


Acked-by: default avatarBjorn Helgaas <bhelgaas@google.com>
Signed-off-by: default avatarLeon Romanovsky <leonro@nvidia.com>
parent 604774ad

drivers/net/ethernet/mellanox/mlx5/core/main.c

+2 −0
Original line number Diff line number Diff line
@@ -1700,6 +1700,8 @@ static struct pci_driver mlx5_core_driver = { 
	.shutdown	= shutdown,

	.err_handler	= &mlx5_err_handler,

	.sriov_configure   = mlx5_core_sriov_configure,

	.sriov_get_vf_total_msix = mlx5_sriov_get_vf_total_msix,

	.sriov_set_msix_vec_count = mlx5_core_sriov_set_msix_vec_count,

};



static void mlx5_core_verify_params(void)

drivers/net/ethernet/mellanox/mlx5/core/mlx5_core.h

+7 −0
Original line number Diff line number Diff line
@@ -140,6 +140,7 @@ 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);

int mlx5_core_sriov_set_msix_vec_count(struct pci_dev *vf, int msix_vec_count);

int mlx5_core_enable_hca(struct mlx5_core_dev *dev, u16 func_id);

int mlx5_core_disable_hca(struct mlx5_core_dev *dev, u16 func_id);

int mlx5_create_scheduling_element_cmd(struct mlx5_core_dev *dev, u8 hierarchy,
@@ -278,4 +279,10 @@ int mlx5_load_one(struct mlx5_core_dev *dev, bool boot); 
int mlx5_vport_get_other_func_cap(struct mlx5_core_dev *dev, u16 function_id, void *out);



void mlx5_events_work_enqueue(struct mlx5_core_dev *dev, struct work_struct *work);

static inline u32 mlx5_sriov_get_vf_total_msix(struct pci_dev *pdev)

{

	struct mlx5_core_dev *dev = pci_get_drvdata(pdev);



	return MLX5_CAP_GEN_MAX(dev, num_total_dynamic_vf_msix);

}

#endif /* __MLX5_CORE_H__ */

drivers/net/ethernet/mellanox/mlx5/core/sriov.c

+35 −0
Original line number Diff line number Diff line
@@ -187,6 +187,41 @@ int mlx5_core_sriov_configure(struct pci_dev *pdev, int num_vfs) 
	return err ? err : num_vfs;

}



int mlx5_core_sriov_set_msix_vec_count(struct pci_dev *vf, int msix_vec_count)

{

	struct pci_dev *pf = pci_physfn(vf);

	struct mlx5_core_sriov *sriov;

	struct mlx5_core_dev *dev;

	int num_vf_msix, id;



	dev = pci_get_drvdata(pf);

	num_vf_msix = MLX5_CAP_GEN_MAX(dev, num_total_dynamic_vf_msix);

	if (!num_vf_msix)

		return -EOPNOTSUPP;



	if (!msix_vec_count)

		msix_vec_count =

			mlx5_get_default_msix_vec_count(dev, pci_num_vf(pf));



	sriov = &dev->priv.sriov;



	/* Reversed translation of PCI VF function number to the internal

	 * function_id, which exists in the name of virtfn symlink.

	 */

	for (id = 0; id < pci_num_vf(pf); id++) {

		if (!sriov->vfs_ctx[id].enabled)

			continue;



		if (vf->devfn == pci_iov_virtfn_devfn(pf, id))

			break;

	}



	if (id == pci_num_vf(pf) || !sriov->vfs_ctx[id].enabled)

		return -EINVAL;



	return mlx5_set_msix_vec_count(dev, id + 1, msix_vec_count);

}



int mlx5_sriov_attach(struct mlx5_core_dev *dev)

{

	if (!mlx5_core_is_pf(dev) || !pci_num_vf(dev->pdev))