[PATCH mlx5-next v7 4/4] net/mlx5: Implement sriov_get_vf_total_msix/count() callbacks

Leon Romanovsky
2021-03-01T07:56:48Z

From: Leon Romanovsky <leonro@nvidia.com>

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

Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
---
.../net/ethernet/mellanox/mlx5/core/main.c | 2 ++
.../ethernet/mellanox/mlx5/core/mlx5_core.h | 7 ++++
.../net/ethernet/mellanox/mlx5/core/sriov.c | 35 +++++++++++++++++++
3 files changed, 44 insertions(+)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/main.c b/drivers/net/ethernet/mellanox/mlx5/core/main.c
index 0489712865b7..edca6bc87639 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/main.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/main.c
@@ -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)
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/mlx5_core.h b/drivers/net/ethernet/mellanox/mlx5/core/mlx5_core.h
index f0aed664dd35..99007f2d0424 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/mlx5_core.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/mlx5_core.h
@@ -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__ */
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/sriov.c b/drivers/net/ethernet/mellanox/mlx5/core/sriov.c
index f0ec86a1c8a6..2338989d4403 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/sriov.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/sriov.c
@@ -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))
--
2.29.2