From 91be0bd6c6cf21328017e990d3ceeb00f03821fd Mon Sep 17 00:00:00 2001 From: Jason Gunthorpe Date: Wed, 11 May 2022 13:19:07 -0600 Subject: vfio/pci: Have all VFIO PCI drivers store the vfio_pci_core_device in drvdata Having a consistent pointer in the drvdata will allow the next patch to make use of the drvdata from some of the core code helpers. Use a WARN_ON inside vfio_pci_core_register_device() to detect drivers that miss this. Signed-off-by: Jason Gunthorpe Link: https://lore.kernel.org/r/1-v4-c841817a0349+8f-vfio_get_from_dev_jgg@nvidia.com Signed-off-by: Alex Williamson --- drivers/vfio/pci/hisilicon/hisi_acc_vfio_pci.c | 15 +++++++++++---- drivers/vfio/pci/mlx5/main.c | 15 +++++++++++---- drivers/vfio/pci/vfio_pci.c | 2 +- drivers/vfio/pci/vfio_pci_core.c | 4 ++++ 4 files changed, 27 insertions(+), 9 deletions(-) (limited to 'drivers/vfio') diff --git a/drivers/vfio/pci/hisilicon/hisi_acc_vfio_pci.c b/drivers/vfio/pci/hisilicon/hisi_acc_vfio_pci.c index 767b5d47631a..e92376837b29 100644 --- a/drivers/vfio/pci/hisilicon/hisi_acc_vfio_pci.c +++ b/drivers/vfio/pci/hisilicon/hisi_acc_vfio_pci.c @@ -337,6 +337,14 @@ static int vf_qm_cache_wb(struct hisi_qm *qm) return 0; } +static struct hisi_acc_vf_core_device *hssi_acc_drvdata(struct pci_dev *pdev) +{ + struct vfio_pci_core_device *core_device = dev_get_drvdata(&pdev->dev); + + return container_of(core_device, struct hisi_acc_vf_core_device, + core_device); +} + static void vf_qm_fun_reset(struct hisi_acc_vf_core_device *hisi_acc_vdev, struct hisi_qm *qm) { @@ -962,7 +970,7 @@ hisi_acc_vfio_pci_get_device_state(struct vfio_device *vdev, static void hisi_acc_vf_pci_aer_reset_done(struct pci_dev *pdev) { - struct hisi_acc_vf_core_device *hisi_acc_vdev = dev_get_drvdata(&pdev->dev); + struct hisi_acc_vf_core_device *hisi_acc_vdev = hssi_acc_drvdata(pdev); if (hisi_acc_vdev->core_device.vdev.migration_flags != VFIO_MIGRATION_STOP_COPY) @@ -1274,11 +1282,10 @@ static int hisi_acc_vfio_pci_probe(struct pci_dev *pdev, const struct pci_device &hisi_acc_vfio_pci_ops); } + dev_set_drvdata(&pdev->dev, &hisi_acc_vdev->core_device); ret = vfio_pci_core_register_device(&hisi_acc_vdev->core_device); if (ret) goto out_free; - - dev_set_drvdata(&pdev->dev, hisi_acc_vdev); return 0; out_free: @@ -1289,7 +1296,7 @@ out_free: static void hisi_acc_vfio_pci_remove(struct pci_dev *pdev) { - struct hisi_acc_vf_core_device *hisi_acc_vdev = dev_get_drvdata(&pdev->dev); + struct hisi_acc_vf_core_device *hisi_acc_vdev = hssi_acc_drvdata(pdev); vfio_pci_core_unregister_device(&hisi_acc_vdev->core_device); vfio_pci_core_uninit_device(&hisi_acc_vdev->core_device); diff --git a/drivers/vfio/pci/mlx5/main.c b/drivers/vfio/pci/mlx5/main.c index df8b572977da..dd1009b5ff9c 100644 --- a/drivers/vfio/pci/mlx5/main.c +++ b/drivers/vfio/pci/mlx5/main.c @@ -24,6 +24,14 @@ /* Arbitrary to prevent userspace from consuming endless memory */ #define MAX_MIGRATION_SIZE (512*1024*1024) +static struct mlx5vf_pci_core_device *mlx5vf_drvdata(struct pci_dev *pdev) +{ + struct vfio_pci_core_device *core_device = dev_get_drvdata(&pdev->dev); + + return container_of(core_device, struct mlx5vf_pci_core_device, + core_device); +} + static struct page * mlx5vf_get_migration_page(struct mlx5_vf_migration_file *migf, unsigned long offset) @@ -518,7 +526,7 @@ static int mlx5vf_pci_get_device_state(struct vfio_device *vdev, static void mlx5vf_pci_aer_reset_done(struct pci_dev *pdev) { - struct mlx5vf_pci_core_device *mvdev = dev_get_drvdata(&pdev->dev); + struct mlx5vf_pci_core_device *mvdev = mlx5vf_drvdata(pdev); if (!mvdev->migrate_cap) return; @@ -592,11 +600,10 @@ static int mlx5vf_pci_probe(struct pci_dev *pdev, return -ENOMEM; vfio_pci_core_init_device(&mvdev->core_device, pdev, &mlx5vf_pci_ops); mlx5vf_cmd_set_migratable(mvdev); + dev_set_drvdata(&pdev->dev, &mvdev->core_device); ret = vfio_pci_core_register_device(&mvdev->core_device); if (ret) goto out_free; - - dev_set_drvdata(&pdev->dev, mvdev); return 0; out_free: @@ -608,7 +615,7 @@ out_free: static void mlx5vf_pci_remove(struct pci_dev *pdev) { - struct mlx5vf_pci_core_device *mvdev = dev_get_drvdata(&pdev->dev); + struct mlx5vf_pci_core_device *mvdev = mlx5vf_drvdata(pdev); vfio_pci_core_unregister_device(&mvdev->core_device); mlx5vf_cmd_remove_migratable(mvdev); diff --git a/drivers/vfio/pci/vfio_pci.c b/drivers/vfio/pci/vfio_pci.c index 2b047469e02f..8c990a1a7def 100644 --- a/drivers/vfio/pci/vfio_pci.c +++ b/drivers/vfio/pci/vfio_pci.c @@ -151,10 +151,10 @@ static int vfio_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) return -ENOMEM; vfio_pci_core_init_device(vdev, pdev, &vfio_pci_ops); + dev_set_drvdata(&pdev->dev, vdev); ret = vfio_pci_core_register_device(vdev); if (ret) goto out_free; - dev_set_drvdata(&pdev->dev, vdev); return 0; out_free: diff --git a/drivers/vfio/pci/vfio_pci_core.c b/drivers/vfio/pci/vfio_pci_core.c index 06b6f3594a13..65587fd5c021 100644 --- a/drivers/vfio/pci/vfio_pci_core.c +++ b/drivers/vfio/pci/vfio_pci_core.c @@ -1821,6 +1821,10 @@ int vfio_pci_core_register_device(struct vfio_pci_core_device *vdev) struct pci_dev *pdev = vdev->pdev; int ret; + /* Drivers must set the vfio_pci_core_device to their drvdata */ + if (WARN_ON(vdev != dev_get_drvdata(&vdev->pdev->dev))) + return -EINVAL; + if (pdev->hdr_type != PCI_HEADER_TYPE_NORMAL) return -EINVAL; -- cgit v1.2.3