diff options
Diffstat (limited to 'drivers/net/ethernet/mellanox/mlx5/core/sriov.c')
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlx5/core/sriov.c | 91 |
1 files changed, 74 insertions, 17 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/sriov.c b/drivers/net/ethernet/mellanox/mlx5/core/sriov.c index e8185b69ac6c..c0e6c487c63c 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/sriov.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/sriov.c @@ -87,6 +87,11 @@ static int mlx5_device_enable_sriov(struct mlx5_core_dev *dev, int num_vfs) enable_vfs_hca: num_msix_count = mlx5_get_default_msix_vec_count(dev, num_vfs); for (vf = 0; vf < num_vfs; vf++) { + /* Notify the VF before its enablement to let it set + * some stuff. + */ + blocking_notifier_call_chain(&sriov->vfs_ctx[vf].notifier, + MLX5_PF_NOTIFY_ENABLE_VF, dev); err = mlx5_core_enable_hca(dev, vf + 1); if (err) { mlx5_core_warn(dev, "failed to enable VF %d (%d)\n", vf, err); @@ -127,6 +132,11 @@ mlx5_device_disable_sriov(struct mlx5_core_dev *dev, int num_vfs, bool clear_vf) for (vf = num_vfs - 1; vf >= 0; vf--) { if (!sriov->vfs_ctx[vf].enabled) continue; + /* Notify the VF before its disablement to let it clean + * some resources. + */ + blocking_notifier_call_chain(&sriov->vfs_ctx[vf].notifier, + MLX5_PF_NOTIFY_DISABLE_VF, dev); err = mlx5_core_disable_hca(dev, vf + 1); if (err) { mlx5_core_warn(dev, "failed to disable VF %d\n", vf); @@ -135,8 +145,7 @@ mlx5_device_disable_sriov(struct mlx5_core_dev *dev, int num_vfs, bool clear_vf) sriov->vfs_ctx[vf].enabled = 0; } - if (MLX5_ESWITCH_MANAGER(dev)) - mlx5_eswitch_disable(dev->priv.eswitch, clear_vf); + mlx5_eswitch_disable_sriov(dev->priv.eswitch, clear_vf); if (mlx5_wait_for_pages(dev, &dev->priv.vfs_pages)) mlx5_core_warn(dev, "timeout reclaiming VFs pages\n"); @@ -145,9 +154,12 @@ mlx5_device_disable_sriov(struct mlx5_core_dev *dev, int num_vfs, bool clear_vf) static int mlx5_sriov_enable(struct pci_dev *pdev, int num_vfs) { struct mlx5_core_dev *dev = pci_get_drvdata(pdev); + struct devlink *devlink = priv_to_devlink(dev); int err; + devl_lock(devlink); err = mlx5_device_enable_sriov(dev, num_vfs); + devl_unlock(devlink); if (err) { mlx5_core_warn(dev, "mlx5_device_enable_sriov failed : %d\n", err); return err; @@ -161,13 +173,16 @@ static int mlx5_sriov_enable(struct pci_dev *pdev, int num_vfs) return err; } -static void mlx5_sriov_disable(struct pci_dev *pdev) +void mlx5_sriov_disable(struct pci_dev *pdev) { struct mlx5_core_dev *dev = pci_get_drvdata(pdev); + struct devlink *devlink = priv_to_devlink(dev); int num_vfs = pci_num_vf(dev->pdev); pci_disable_sriov(pdev); + devl_lock(devlink); mlx5_device_disable_sriov(dev, num_vfs, true); + devl_unlock(devlink); } int mlx5_core_sriov_configure(struct pci_dev *pdev, int num_vfs) @@ -205,19 +220,8 @@ int mlx5_core_sriov_set_msix_vec_count(struct pci_dev *vf, int 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) + id = pci_iov_vf_id(vf); + if (id < 0 || !sriov->vfs_ctx[id].enabled) return -EINVAL; return mlx5_set_msix_vec_count(dev, id + 1, msix_vec_count); @@ -268,7 +272,7 @@ int mlx5_sriov_init(struct mlx5_core_dev *dev) { struct mlx5_core_sriov *sriov = &dev->priv.sriov; struct pci_dev *pdev = dev->pdev; - int total_vfs; + int total_vfs, i; if (!mlx5_core_is_pf(dev)) return 0; @@ -280,6 +284,9 @@ int mlx5_sriov_init(struct mlx5_core_dev *dev) if (!sriov->vfs_ctx) return -ENOMEM; + for (i = 0; i < total_vfs; i++) + BLOCKING_INIT_NOTIFIER_HEAD(&sriov->vfs_ctx[i].notifier); + return 0; } @@ -292,3 +299,53 @@ void mlx5_sriov_cleanup(struct mlx5_core_dev *dev) kfree(sriov->vfs_ctx); } + +/** + * mlx5_sriov_blocking_notifier_unregister - Unregister a VF from + * a notification block chain. + * + * @mdev: The mlx5 core device. + * @vf_id: The VF id. + * @nb: The notifier block to be unregistered. + */ +void mlx5_sriov_blocking_notifier_unregister(struct mlx5_core_dev *mdev, + int vf_id, + struct notifier_block *nb) +{ + struct mlx5_vf_context *vfs_ctx; + struct mlx5_core_sriov *sriov; + + sriov = &mdev->priv.sriov; + if (WARN_ON(vf_id < 0 || vf_id >= sriov->num_vfs)) + return; + + vfs_ctx = &sriov->vfs_ctx[vf_id]; + blocking_notifier_chain_unregister(&vfs_ctx->notifier, nb); +} +EXPORT_SYMBOL(mlx5_sriov_blocking_notifier_unregister); + +/** + * mlx5_sriov_blocking_notifier_register - Register a VF notification + * block chain. + * + * @mdev: The mlx5 core device. + * @vf_id: The VF id. + * @nb: The notifier block to be called upon the VF events. + * + * Returns 0 on success or an error code. + */ +int mlx5_sriov_blocking_notifier_register(struct mlx5_core_dev *mdev, + int vf_id, + struct notifier_block *nb) +{ + struct mlx5_vf_context *vfs_ctx; + struct mlx5_core_sriov *sriov; + + sriov = &mdev->priv.sriov; + if (vf_id < 0 || vf_id >= sriov->num_vfs) + return -EINVAL; + + vfs_ctx = &sriov->vfs_ctx[vf_id]; + return blocking_notifier_chain_register(&vfs_ctx->notifier, nb); +} +EXPORT_SYMBOL(mlx5_sriov_blocking_notifier_register); |