VFIO implements platform independent stuff such as a PCI driver, BAR access (via read/write on a file descriptor or direct mapping when possible) and IRQ signaling. The platform dependent part includes IOMMU initialization and handling. This implements an IOMMU driver for VFIO which does mapping/unmapping pages for the guest IO and provides information about DMA window (required by a POWER guest).
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| @@ -22,6 +22,7 @@ · 21 unmodified lines | |||
| 22 | /* Extensions */ | 22 | /* Extensions */ |
| 23 | 23 | ||
| 24 | #define VFIO_TYPE1_IOMMU 1 | 24 | #define VFIO_TYPE1_IOMMU 1 |
| 25 | #define VFIO_SPAPR_TCE_IOMMU 2 | ||
| 25 | 26 | ||
| 26 | /* | 27 | /* |
| 27 | * The IOCTL interface is designed for extensibility by embedding the | 28 | * The IOCTL interface is designed for extensibility by embedding the |
| @@ -375,4 +376,37 @@ struct vfio_iommu_type1_dma_unmap { · 347 unmodified lines | |||
| 375 | 376 | ||
| 376 | #define VFIO_IOMMU_UNMAP_DMA _IO(VFIO_TYPE, VFIO_BASE + 14) | 377 | #define VFIO_IOMMU_UNMAP_DMA _IO(VFIO_TYPE, VFIO_BASE + 14) |
| 377 | 378 | ||
| 379 | /* | ||
| 380 | * IOCTLs to enable/disable IOMMU container usage. | ||
| 381 | * No parameters are supported. | ||
| 382 | */ | ||
| 383 | #define VFIO_IOMMU_ENABLE _IO(VFIO_TYPE, VFIO_BASE + 15) | ||
| 384 | #define VFIO_IOMMU_DISABLE _IO(VFIO_TYPE, VFIO_BASE + 16) | ||
| 385 | |||
| 386 | /* -------- Additional API for SPAPR TCE (Server POWERPC) IOMMU -------- */ | ||
| 387 | |||
| 388 | /* | ||
| 389 | * The SPAPR TCE info struct provides the information about the PCI bus | ||
| 390 | * address ranges available for DMA, these values are programmed into | ||
| 391 | * the hardware so the guest has to know that information. | ||
| 392 | * | ||
| 393 | * The DMA 32 bit window start is an absolute PCI bus address. | ||
| 394 | * The IOVA address passed via map/unmap ioctls are absolute PCI bus | ||
| 395 | * addresses too so the window works as a filter rather than an offset | ||
| 396 | * for IOVA addresses. | ||
| 397 | * | ||
| 398 | * A flag will need to be added if other page sizes are supported, | ||
| 399 | * so as defined here, it is always 4k. | ||
| 400 | */ | ||
| 401 | struct vfio_iommu_spapr_tce_info { | ||
| 402 | __u32 argsz; | ||
| 403 | __u32 flags; /* reserved for future use */ | ||
| 404 | __u32 dma32_window_start; /* 32 bit window start (bytes) */ | ||
| 405 | __u32 dma32_window_size; /* 32 bit window size (bytes) */ | ||
| 406 | }; | ||
| 407 | |||
| 408 | #define VFIO_IOMMU_SPAPR_TCE_GET_INFO _IO(VFIO_TYPE, VFIO_BASE + 12) | ||
| 409 | |||
| 410 | /* ***************************************************************** */ | ||
| 411 | |||
| 378 | #endif /* _UAPIVFIO_H */ | 412 | #endif /* _UAPIVFIO_H */ |