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Message-Id: <20210209133445.700225-5-leon@kernel.org>
Date: Tue, 9 Feb 2021 15:34:45 +0200
From: Leon Romanovsky <leon@...nel.org>
To: Bjorn Helgaas <bhelgaas@...gle.com>,
Saeed Mahameed <saeedm@...dia.com>
Cc: Leon Romanovsky <leonro@...dia.com>,
Jason Gunthorpe <jgg@...dia.com>,
Alexander Duyck <alexander.duyck@...il.com>,
Jakub Kicinski <kuba@...nel.org>, linux-pci@...r.kernel.org,
linux-rdma@...r.kernel.org, netdev@...r.kernel.org,
Don Dutile <ddutile@...hat.com>,
Alex Williamson <alex.williamson@...hat.com>,
"David S . Miller" <davem@...emloft.net>
Subject: [PATCH mlx5-next v6 4/4] net/mlx5: Allow to the users to configure number of MSI-X vectors
From: Leon Romanovsky <leonro@...dia.com>
Implement ability to configure MSI-X for the SR-IOV VFs.
Signed-off-by: Leon Romanovsky <leonro@...dia.com>
---
.../net/ethernet/mellanox/mlx5/core/main.c | 13 ++++++
.../ethernet/mellanox/mlx5/core/mlx5_core.h | 22 +++++++++
.../net/ethernet/mellanox/mlx5/core/sriov.c | 45 +++++++++++++++++++
3 files changed, 80 insertions(+)
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/main.c b/drivers/net/ethernet/mellanox/mlx5/core/main.c
index 79cfcc844156..db59c51e148e 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/main.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/main.c
@@ -1395,6 +1395,14 @@ static int init_one(struct pci_dev *pdev, const struct pci_device_id *id)
goto err_load_one;
}
+ err = mlx5_enable_vf_overlay(dev);
+ if (err) {
+ mlx5_core_err(dev,
+ "mlx5_enable_vf_overlay failed with error code %d\n",
+ err);
+ goto err_vf_overlay;
+ }
+
err = mlx5_crdump_enable(dev);
if (err)
dev_err(&pdev->dev, "mlx5_crdump_enable failed with error code %d\n", err);
@@ -1403,6 +1411,8 @@ static int init_one(struct pci_dev *pdev, const struct pci_device_id *id)
devlink_reload_enable(devlink);
return 0;
+err_vf_overlay:
+ mlx5_unload_one(dev, true);
err_load_one:
mlx5_pci_close(dev);
pci_init_err:
@@ -1423,6 +1433,7 @@ static void remove_one(struct pci_dev *pdev)
devlink_reload_disable(devlink);
mlx5_crdump_disable(dev);
mlx5_drain_health_wq(dev);
+ mlx5_disable_vf_overlay(dev);
mlx5_unload_one(dev, true);
mlx5_pci_close(dev);
mlx5_mdev_uninit(dev);
@@ -1650,6 +1661,8 @@ 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 5babb4434a87..e5c2fa558f77 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/mlx5_core.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/mlx5_core.h
@@ -138,6 +138,7 @@ 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,
@@ -264,4 +265,25 @@ void mlx5_set_nic_state(struct mlx5_core_dev *dev, u8 state);
void mlx5_unload_one(struct mlx5_core_dev *dev, bool cleanup);
int mlx5_load_one(struct mlx5_core_dev *dev, bool boot);
+
+static inline int mlx5_enable_vf_overlay(struct mlx5_core_dev *dev)
+{
+ if (MLX5_CAP_GEN_MAX(dev, num_total_dynamic_vf_msix))
+ return pci_enable_vf_overlay(dev->pdev);
+
+ return 0;
+}
+
+static inline void mlx5_disable_vf_overlay(struct mlx5_core_dev *dev)
+{
+ if (MLX5_CAP_GEN_MAX(dev, num_total_dynamic_vf_msix))
+ pci_disable_vf_overlay(dev->pdev);
+}
+
+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..446bfdfce4a2 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/sriov.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/sriov.c
@@ -156,6 +156,15 @@ static int mlx5_sriov_enable(struct pci_dev *pdev, int num_vfs)
if (err) {
mlx5_core_warn(dev, "pci_enable_sriov failed : %d\n", err);
mlx5_device_disable_sriov(dev, num_vfs, true);
+ return err;
+ }
+
+ err = mlx5_enable_vf_overlay(dev);
+ if (err) {
+ mlx5_core_warn(dev, "mlx5_enable_vf_overlay failed : %d\n",
+ err);
+ pci_disable_sriov(pdev);
+ mlx5_device_disable_sriov(dev, num_vfs, true);
}
return err;
}
@@ -165,6 +174,7 @@ static void mlx5_sriov_disable(struct pci_dev *pdev)
struct mlx5_core_dev *dev = pci_get_drvdata(pdev);
int num_vfs = pci_num_vf(dev->pdev);
+ mlx5_disable_vf_overlay(dev);
pci_disable_sriov(pdev);
mlx5_device_disable_sriov(dev, num_vfs, true);
}
@@ -187,6 +197,41 @@ 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
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