1 " lm_J*j"T~qTţ h 0 " lm_J*j"T~qţ h 1   File not found. +l=J!e8Ep Tţ i/_I|+?/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ /* Copyright (c) 2021-2022, NVIDIA CORPORATION & AFFILIATES. */ #ifndef _IOMMUFD_H #define _IOMMUFD_H #include #include #define IOMMUFD_TYPE (';') /** * DOC: General ioctl format * * The ioctl interface follows a general format to allow for extensibility. Each * ioctl is passed in a structure pointer as the argument providing the size of * the structure in the first u32. The kernel checks that any structure space * beyond what it understands is 0. This allows userspace to use the backward * compatible portion while consistently using the newer, larger, structures. * * ioctls use a standard meaning for common errnos: * * - ENOTTY: The IOCTL number itself is not supported at all * - E2BIG: The IOCTL number is supported, but the provided structure has * non-zero in a part the kernel does not understand. * - EOPNOTSUPP: The IOCTL number is supported, and the structure is * understood, however a known field has a value the kernel does not * understand or support. * - EINVAL: Everything about the IOCTL was understood, but a field is not * correct. * - ENOENT: An ID or IOVA provided does not exist. * - ENOMEM: Out of memory. * - EOVERFLOW: Mathematics overflowed. * * As well as additional errnos, within specific ioctls. */ enum { IOMMUFD_CMD_BASE = 0x80, IOMMUFD_CMD_DESTROY = IOMMUFD_CMD_BASE, IOMMUFD_CMD_IOAS_ALLOC = 0x81, IOMMUFD_CMD_IOAS_ALLOW_IOVAS = 0x82, IOMMUFD_CMD_IOAS_COPY = 0x83, IOMMUFD_CMD_IOAS_IOVA_RANGES = 0x84, IOMMUFD_CMD_IOAS_MAP = 0x85, IOMMUFD_CMD_IOAS_UNMAP = 0x86, IOMMUFD_CMD_OPTION = 0x87, IOMMUFD_CMD_VFIO_IOAS = 0x88, IOMMUFD_CMD_HWPT_ALLOC = 0x89, IOMMUFD_CMD_GET_HW_INFO = 0x8a, IOMMUFD_CMD_HWPT_SET_DIRTY_TRACKING = 0x8b, IOMMUFD_CMD_HWPT_GET_DIRTY_BITMAP = 0x8c, IOMMUFD_CMD_HWPT_INVALIDATE = 0x8d, IOMMUFD_CMD_FAULT_QUEUE_ALLOC = 0x8e, IOMMUFD_CMD_IOAS_MAP_FILE = 0x8f, IOMMUFD_CMD_VIOMMU_ALLOC = 0x90, IOMMUFD_CMD_VDEVICE_ALLOC = 0x91, IOMMUFD_CMD_IOAS_CHANGE_PROCESS = 0x92, IOMMUFD_CMD_VEVENTQ_ALLOC = 0x93, IOMMUFD_CMD_HW_QUEUE_ALLOC = 0x94, }; /** * struct iommu_destroy - ioctl(IOMMU_DESTROY) * @size: sizeof(struct iommu_destroy) * @id: iommufd object ID to destroy. Can be any destroyable object type. * * Destroy any object held within iommufd. */ struct iommu_destroy { __u32 size; __u32 id; }; #define IOMMU_DESTROY _IO(IOMMUFD_TYPE, IOMMUFD_CMD_DESTROY) /** * struct iommu_ioas_alloc - ioctl(IOMMU_IOAS_ALLOC) * @size: sizeof(struct iommu_ioas_alloc) * @flags: Must be 0 * @out_ioas_id: Output IOAS ID for the allocated object * * Allocate an IO Address Space (IOAS) which holds an IO Virtual Address (IOVA) * to memory mapping. */ struct iommu_ioas_alloc { __u32 size; __u32 flags; __u32 out_ioas_id; }; #define IOMMU_IOAS_ALLOC _IO(IOMMUFD_TYPE, IOMMUFD_CMD_IOAS_ALLOC) /** * struct iommu_iova_range - ioctl(IOMMU_IOVA_RANGE) * @start: First IOVA * @last: Inclusive last IOVA * * An interval in IOVA space. */ struct iommu_iova_range { __aligned_u64 start; __aligned_u64 last; }; /** * struct iommu_ioas_iova_ranges - ioctl(IOMMU_IOAS_IOVA_RANGES) * @size: sizeof(struct iommu_ioas_iova_ranges) * @ioas_id: IOAS ID to read ranges from * @num_iovas: Input/Output total number of ranges in the IOAS * @__reserved: Must be 0 * @allowed_iovas: Pointer to the output array of struct iommu_iova_range * @out_iova_alignment: Minimum alignment required for mapping IOVA * * Query an IOAS for ranges of allowed IOVAs. Mapping IOVA outside these ranges * is not allowed. num_iovas will be set to the total number of iovas and * the allowed_iovas[] will be filled in as space permits. * * The allowed ranges are dependent on the HW path the DMA operation takes, and * can change during the lifetime of the IOAS. A fresh empty IO