diff options
| author | David Matlack <dmatlack@google.com> | 2025-08-22 21:24:56 +0000 |
|---|---|---|
| committer | Alex Williamson <alex.williamson@redhat.com> | 2025-08-27 12:14:04 -0600 |
| commit | 346cd58f1fb588f8ff193d76cf0bb455446ace03 (patch) | |
| tree | e48642ee2f6af4e0f7e8d1fe238994655dc1b6f2 /tools/testing/selftests/vfio/lib/include | |
| parent | vfio: selftests: Validate 2M/1G HugeTLB are mapped as 2M/1G in IOMMU (diff) | |
| download | linux-346cd58f1fb588f8ff193d76cf0bb455446ace03.tar.gz linux-346cd58f1fb588f8ff193d76cf0bb455446ace03.zip | |
vfio: selftests: Keep track of DMA regions mapped into the device
Keep track of the list of DMA regions that are mapped into the device
using a linked list and a new struct vfio_dma_region and use that to add
{__,}to_iova() for converting host virtual addresses into IOVAs.
This will be used in a subsequent commit to map multiple DMA regions
into a device that are then used by drivers.
Acked-by: Shuah Khan <skhan@linuxfoundation.org>
Signed-off-by: David Matlack <dmatlack@google.com>
Link: https://lore.kernel.org/r/20250822212518.4156428-10-dmatlack@google.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Diffstat (limited to 'tools/testing/selftests/vfio/lib/include')
| -rw-r--r-- | tools/testing/selftests/vfio/lib/include/vfio_util.h | 23 |
1 files changed, 20 insertions, 3 deletions
diff --git a/tools/testing/selftests/vfio/lib/include/vfio_util.h b/tools/testing/selftests/vfio/lib/include/vfio_util.h index 234403b442af..db08646c2819 100644 --- a/tools/testing/selftests/vfio/lib/include/vfio_util.h +++ b/tools/testing/selftests/vfio/lib/include/vfio_util.h @@ -51,6 +51,17 @@ struct vfio_pci_bar { void *vaddr; }; +typedef u64 iova_t; + +#define INVALID_IOVA UINT64_MAX + +struct vfio_dma_region { + struct list_head link; + void *vaddr; + iova_t iova; + u64 size; +}; + struct vfio_pci_device { int fd; int group_fd; @@ -63,6 +74,8 @@ struct vfio_pci_device { struct vfio_irq_info msi_info; struct vfio_irq_info msix_info; + struct list_head dma_regions; + /* eventfds for MSI and MSI-x interrupts */ int msi_eventfds[PCI_MSIX_FLAGS_QSIZE + 1]; }; @@ -85,9 +98,10 @@ struct vfio_pci_device *vfio_pci_device_init(const char *bdf, int iommu_type); void vfio_pci_device_cleanup(struct vfio_pci_device *device); void vfio_pci_device_reset(struct vfio_pci_device *device); -void vfio_pci_dma_map(struct vfio_pci_device *device, u64 iova, u64 size, - void *vaddr); -void vfio_pci_dma_unmap(struct vfio_pci_device *device, u64 iova, u64 size); +void vfio_pci_dma_map(struct vfio_pci_device *device, + struct vfio_dma_region *region); +void vfio_pci_dma_unmap(struct vfio_pci_device *device, + struct vfio_dma_region *region); void vfio_pci_config_access(struct vfio_pci_device *device, bool write, size_t config, size_t size, void *data); @@ -138,4 +152,7 @@ static inline void vfio_pci_msix_disable(struct vfio_pci_device *device) vfio_pci_irq_disable(device, VFIO_PCI_MSIX_IRQ_INDEX); } +iova_t __to_iova(struct vfio_pci_device *device, void *vaddr); +iova_t to_iova(struct vfio_pci_device *device, void *vaddr); + #endif /* SELFTESTS_VFIO_LIB_INCLUDE_VFIO_UTIL_H */ |