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Code Issues Releases Wiki Activity

vfio/pci: Have all VFIO PCI drivers store the vfio_pci_core_device in drvdata

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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 <jgg@nvidia.com>
Link: https://lore.kernel.org/r/1-v4-c841817a0349+8f-vfio_get_from_dev_jgg@nvidia.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
This commit is contained in:
Jason Gunthorpe 2022-05-11 13:19:07 -06:00 committed by Alex Williamson
parent eadd86f835
commit 91be0bd6c6
4 changed files with 27 additions and 9 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

15
drivers/vfio/pci/hisilicon/hisi_acc_vfio_pci.c
View file

@ -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 @@ static int hisi_acc_vfio_pci_probe(struct pci_dev *pdev, const struct pci_device
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);

15
drivers/vfio/pci/mlx5/main.c
View file

@ -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 @@ static int mlx5vf_pci_probe(struct pci_dev *pdev,
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);

2
drivers/vfio/pci/vfio_pci.c
View file

@ -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:

4
drivers/vfio/pci/vfio_pci_core.c
View file

@ -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;