f7cbfa7130
Since commit da3c22c74a3c ("linux-headers: Update to Linux v6.6-rc1"),
linux-headers has been updated to v6.6-rc1.
As previous patch added iommufd.h to update-linux-headers.sh,
run the script again against TAG v6.6-rc1 to have iommufd.h included.
Signed-off-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
Reviewed-by: Cédric Le Goater <clg@redhat.com>
Signed-off-by: Cédric Le Goater <clg@redhat.com>
445 lines
15 KiB
C
445 lines
15 KiB
C
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
|
|
/* Copyright (c) 2021-2022, NVIDIA CORPORATION & AFFILIATES.
|
|
*/
|
|
#ifndef _IOMMUFD_H
|
|
#define _IOMMUFD_H
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/ioctl.h>
|
|
|
|
#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,
|
|
IOMMUFD_CMD_IOAS_ALLOW_IOVAS,
|
|
IOMMUFD_CMD_IOAS_COPY,
|
|
IOMMUFD_CMD_IOAS_IOVA_RANGES,
|
|
IOMMUFD_CMD_IOAS_MAP,
|
|
IOMMUFD_CMD_IOAS_UNMAP,
|
|
IOMMUFD_CMD_OPTION,
|
|
IOMMUFD_CMD_VFIO_IOAS,
|
|
IOMMUFD_CMD_HWPT_ALLOC,
|
|
IOMMUFD_CMD_GET_HW_INFO,
|
|
};
|
|
|
|
/**
|
|
* 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 IOAS will have a
|
|
* full range, and each attached device will narrow the ranges based on that
|
|
* device's HW restrictions. Detaching a device can widen the ranges. Userspace
|
|
* should query ranges after every attach/detach to know what IOVAs are valid
|
|
* for mapping.
|
|
*
|
|
* On input num_iovas is the length of the allowed_iovas array. On output it is
|
|
* the total number of iovas filled in. The ioctl will return -EMSGSIZE and set
|
|
* num_iovas to the required value if num_iovas is too small. In this case the
|
|
* caller should allocate a larger output array and re-issue the ioctl.
|
|
*
|
|
* out_iova_alignment returns the minimum IOVA alignment that can be given
|
|
* to IOMMU_IOAS_MAP/COPY. IOVA's must satisfy::
|
|
*
|
|
* starting_iova % out_iova_alignment == 0
|
|
* (starting_iova + length) % out_iova_alignment == 0
|
|
*
|
|
* out_iova_alignment can be 1 indicating any IOVA is allowed. It cannot
|
|
* be higher than the system PAGE_SIZE.
|
|
*/
|
|
struct iommu_ioas_iova_ranges {
|
|
__u32 size;
|
|
__u32 ioas_id;
|
|
__u32 num_iovas;
|
|
__u32 __reserved;
|
|
__aligned_u64 allowed_iovas;
|
|
__aligned_u64 out_iova_alignment;
|
|
};
|
|
#define IOMMU_IOAS_IOVA_RANGES _IO(IOMMUFD_TYPE, IOMMUFD_CMD_IOAS_IOVA_RANGES)
|
|
|
|
/**
|
|
* struct iommu_ioas_allow_iovas - ioctl(IOMMU_IOAS_ALLOW_IOVAS)
|
|
* @size: sizeof(struct iommu_ioas_allow_iovas)
|
|
* @ioas_id: IOAS ID to allow IOVAs from
|
|
* @num_iovas: Input/Output total number of ranges in the IOAS
|
|
* @__reserved: Must be 0
|
|
* @allowed_iovas: Pointer to array of struct iommu_iova_range
|
|
*
|
|
* Ensure a range of IOVAs are always available for allocation. If this call
|
|
* succeeds then IOMMU_IOAS_IOVA_RANGES will never return a list of IOVA ranges
|
|
* that are narrower than the ranges provided here. This call will fail if
|
|
* IOMMU_IOAS_IOVA_RANGES is currently narrower than the given ranges.
|
|
*
|
|
* When an IOAS is first created the IOVA_RANGES will be maximally sized, and as
|
|
* devices are attached the IOVA will narrow based on the device restrictions.
|
|
* When an allowed range is specified any narrowing will be refused, ie device
|
|
* attachment can fail if the device requires limiting within the allowed range.
|
|
*
|
|
* Automatic IOVA allocation is also impacted by this call. MAP will only
|
|
* allocate within the allowed IOVAs if they are present.
|
|
*
|
|
* This call replaces the entire allowed list with the given list.
|
|
*/
|
|
struct iommu_ioas_allow_iovas {
|
|
__u32 size;
|
|
__u32 ioas_id;
|
|
__u32 num_iovas;
|
|
__u32 __reserved;
|
|
__aligned_u64 allowed_iovas;
|
|
};
|
|
#define IOMMU_IOAS_ALLOW_IOVAS _IO(IOMMUFD_TYPE, IOMMUFD_CMD_IOAS_ALLOW_IOVAS)
|
|
|
|
/**
|
|
* enum iommufd_ioas_map_flags - Flags for map and copy
|
|
* @IOMMU_IOAS_MAP_FIXED_IOVA: If clear the kernel will compute an appropriate
|
|
* IOVA to place the mapping at
|
|
* @IOMMU_IOAS_MAP_WRITEABLE: DMA is allowed to write to this mapping
|
|
* @IOMMU_IOAS_MAP_READABLE: DMA is allowed to read from this mapping
|
|
*/
|
|
enum iommufd_ioas_map_flags {
|
|
IOMMU_IOAS_MAP_FIXED_IOVA = 1 << 0,
|
|
IOMMU_IOAS_MAP_WRITEABLE = 1 << 1,
|
|
IOMMU_IOAS_MAP_READABLE = 1 << 2,
|
|
};
|
|
|
|
/**
|
|
* struct iommu_ioas_map - ioctl(IOMMU_IOAS_MAP)
|
|
* @size: sizeof(struct iommu_ioas_map)
|
|
* @flags: Combination of enum iommufd_ioas_map_flags
|
|
* @ioas_id: IOAS ID to change the mapping of
|
|
* @__reserved: Must be 0
|
|
* @user_va: Userspace pointer to start mapping from
|
|
* @length: Number of bytes to map
|
|
* @iova: IOVA the mapping was placed at. If IOMMU_IOAS_MAP_FIXED_IOVA is set
|
|
* then this must be provided as input.
|
|
*
|
|
* Set an IOVA mapping from a user pointer. If FIXED_IOVA is specified then the
|
|
* mapping will be established at iova, otherwise a suitable location based on
|
|
* the reserved and allowed lists will be automatically selected and returned in
|
|
* iova.
|
|
*
|
|
* If IOMMU_IOAS_MAP_FIXED_IOVA is specified then the iova range must currently
|
|
* be unused, existing IOVA cannot be replaced.
|
|
*/
|
|
struct iommu_ioas_map {
|
|
__u32 size;
|
|
__u32 flags;
|
|
__u32 ioas_id;
|
|
__u32 __reserved;
|
|
__aligned_u64 user_va;
|
|
__aligned_u64 length;
|
|
__aligned_u64 iova;
|
|
};
|
|
#define IOMMU_IOAS_MAP _IO(IOMMUFD_TYPE, IOMMUFD_CMD_IOAS_MAP)
|
|
|
|
/**
|
|
* struct iommu_ioas_copy - ioctl(IOMMU_IOAS_COPY)
|
|
* @size: sizeof(struct iommu_ioas_copy)
|
|
* @flags: Combination of enum iommufd_ioas_map_flags
|
|
* @dst_ioas_id: IOAS ID to change the mapping of
|
|
* @src_ioas_id: IOAS ID to copy from
|
|
* @length: Number of bytes to copy and map
|
|
* @dst_iova: IOVA the mapping was placed at. If IOMMU_IOAS_MAP_FIXED_IOVA is
|
|
* set then this must be provided as input.
|
|
* @src_iova: IOVA to start the copy
|
|
*
|
|
* Copy an already existing mapping from src_ioas_id and establish it in
|
|
* dst_ioas_id. The src iova/length must exactly match a range used with
|
|
* IOMMU_IOAS_MAP.
|
|
*
|
|
* This may be used to efficiently clone a subset of an IOAS to another, or as a
|
|
* kind of 'cache' to speed up mapping. Copy has an efficiency advantage over
|
|
* establishing equivalent new mappings, as internal resources are shared, and
|
|
* the kernel will pin the user memory only once.
|
|
*/
|
|
struct iommu_ioas_copy {
|
|
__u32 size;
|
|
__u32 flags;
|
|
__u32 dst_ioas_id;
|
|
__u32 src_ioas_id;
|
|
__aligned_u64 length;
|
|
__aligned_u64 dst_iova;
|
|
__aligned_u64 src_iova;
|
|
};
|
|
#define IOMMU_IOAS_COPY _IO(IOMMUFD_TYPE, IOMMUFD_CMD_IOAS_COPY)
|
|
|
|
/**
|
|
* struct iommu_ioas_unmap - ioctl(IOMMU_IOAS_UNMAP)
|
|
* @size: sizeof(struct iommu_ioas_unmap)
|
|
* @ioas_id: IOAS ID to change the mapping of
|
|
* @iova: IOVA to start the unmapping at
|
|
* @length: Number of bytes to unmap, and return back the bytes unmapped
|
|
*
|
|
* Unmap an IOVA range. The iova/length must be a superset of a previously
|
|
* mapped range used with IOMMU_IOAS_MAP or IOMMU_IOAS_COPY. Splitting or
|
|
* truncating ranges is not allowed. The values 0 to U64_MAX will unmap
|
|
* everything.
|
|
*/
|
|
struct iommu_ioas_unmap {
|
|
__u32 size;
|
|
__u32 ioas_id;
|
|
__aligned_u64 iova;
|
|
__aligned_u64 length;
|
|
};
|
|
#define IOMMU_IOAS_UNMAP _IO(IOMMUFD_TYPE, IOMMUFD_CMD_IOAS_UNMAP)
|
|
|
|
/**
|
|
* enum iommufd_option - ioctl(IOMMU_OPTION_RLIMIT_MODE) and
|
|
* ioctl(IOMMU_OPTION_HUGE_PAGES)
|
|
* @IOMMU_OPTION_RLIMIT_MODE:
|
|
* Change how RLIMIT_MEMLOCK accounting works. The caller must have privilege
|
|
* to invoke this. Value 0 (default) is user based accouting, 1 uses process
|
|
* based accounting. Global option, object_id must be 0
|
|
* @IOMMU_OPTION_HUGE_PAGES:
|
|
* Value 1 (default) allows contiguous pages to be combined when generating
|
|
* iommu mappings. Value 0 disables combining, everything is mapped to
|
|
* PAGE_SIZE. This can be useful for benchmarking. This is a per-IOAS
|
|
* option, the object_id must be the IOAS ID.
|
|
*/
|
|
enum iommufd_option {
|
|
IOMMU_OPTION_RLIMIT_MODE = 0,
|
|
IOMMU_OPTION_HUGE_PAGES = 1,
|
|
};
|
|
|
|
/**
|
|
* enum iommufd_option_ops - ioctl(IOMMU_OPTION_OP_SET) and
|
|
* ioctl(IOMMU_OPTION_OP_GET)
|
|
* @IOMMU_OPTION_OP_SET: Set the option's value
|
|
* @IOMMU_OPTION_OP_GET: Get the option's value
|
|
*/
|
|
enum iommufd_option_ops {
|
|
IOMMU_OPTION_OP_SET = 0,
|
|
IOMMU_OPTION_OP_GET = 1,
|
|
};
|
|
|
|
/**
|
|
* struct iommu_option - iommu option multiplexer
|
|
* @size: sizeof(struct iommu_option)
|
|
* @option_id: One of enum iommufd_option
|
|
* @op: One of enum iommufd_option_ops
|
|
* @__reserved: Must be 0
|
|
* @object_id: ID of the object if required
|
|
* @val64: Option value to set or value returned on get
|
|
*
|
|
* Change a simple option value. This multiplexor allows controlling options
|
|
* on objects. IOMMU_OPTION_OP_SET will load an option and IOMMU_OPTION_OP_GET
|
|
* will return the current value.
|
|
*/
|
|
struct iommu_option {
|
|
__u32 size;
|
|
__u32 option_id;
|
|
__u16 op;
|
|
__u16 __reserved;
|
|
__u32 object_id;
|
|
__aligned_u64 val64;
|
|
};
|
|
#define IOMMU_OPTION _IO(IOMMUFD_TYPE, IOMMUFD_CMD_OPTION)
|
|
|
|
/**
|
|
* enum iommufd_vfio_ioas_op - IOMMU_VFIO_IOAS_* ioctls
|
|
* @IOMMU_VFIO_IOAS_GET: Get the current compatibility IOAS
|
|
* @IOMMU_VFIO_IOAS_SET: Change the current compatibility IOAS
|
|
* @IOMMU_VFIO_IOAS_CLEAR: Disable VFIO compatibility
|
|
*/
|
|
enum iommufd_vfio_ioas_op {
|
|
IOMMU_VFIO_IOAS_GET = 0,
|
|
IOMMU_VFIO_IOAS_SET = 1,
|
|
IOMMU_VFIO_IOAS_CLEAR = 2,
|
|
};
|
|
|
|
/**
|
|
* struct iommu_vfio_ioas - ioctl(IOMMU_VFIO_IOAS)
|
|
* @size: sizeof(struct iommu_vfio_ioas)
|
|
* @ioas_id: For IOMMU_VFIO_IOAS_SET the input IOAS ID to set
|
|
* For IOMMU_VFIO_IOAS_GET will output the IOAS ID
|
|
* @op: One of enum iommufd_vfio_ioas_op
|
|
* @__reserved: Must be 0
|
|
*
|
|
* The VFIO compatibility support uses a single ioas because VFIO APIs do not
|
|
* support the ID field. Set or Get the IOAS that VFIO compatibility will use.
|
|
* When VFIO_GROUP_SET_CONTAINER is used on an iommufd it will get the
|
|
* compatibility ioas, either by taking what is already set, or auto creating
|
|
* one. From then on VFIO will continue to use that ioas and is not effected by
|
|
* this ioctl. SET or CLEAR does not destroy any auto-created IOAS.
|
|
*/
|
|
struct iommu_vfio_ioas {
|
|
__u32 size;
|
|
__u32 ioas_id;
|
|
__u16 op;
|
|
__u16 __reserved;
|
|
};
|
|
#define IOMMU_VFIO_IOAS _IO(IOMMUFD_TYPE, IOMMUFD_CMD_VFIO_IOAS)
|
|
|
|
/**
|
|
* struct iommu_hwpt_alloc - ioctl(IOMMU_HWPT_ALLOC)
|
|
* @size: sizeof(struct iommu_hwpt_alloc)
|
|
* @flags: Must be 0
|
|
* @dev_id: The device to allocate this HWPT for
|
|
* @pt_id: The IOAS to connect this HWPT to
|
|
* @out_hwpt_id: The ID of the new HWPT
|
|
* @__reserved: Must be 0
|
|
*
|
|
* Explicitly allocate a hardware page table object. This is the same object
|
|
* type that is returned by iommufd_device_attach() and represents the
|
|
* underlying iommu driver's iommu_domain kernel object.
|
|
*
|
|
* A HWPT will be created with the IOVA mappings from the given IOAS.
|
|
*/
|
|
struct iommu_hwpt_alloc {
|
|
__u32 size;
|
|
__u32 flags;
|
|
__u32 dev_id;
|
|
__u32 pt_id;
|
|
__u32 out_hwpt_id;
|
|
__u32 __reserved;
|
|
};
|
|
#define IOMMU_HWPT_ALLOC _IO(IOMMUFD_TYPE, IOMMUFD_CMD_HWPT_ALLOC)
|
|
|
|
/**
|
|
* struct iommu_hw_info_vtd - Intel VT-d hardware information
|
|
*
|
|
* @flags: Must be 0
|
|
* @__reserved: Must be 0
|
|
*
|
|
* @cap_reg: Value of Intel VT-d capability register defined in VT-d spec
|
|
* section 11.4.2 Capability Register.
|
|
* @ecap_reg: Value of Intel VT-d capability register defined in VT-d spec
|
|
* section 11.4.3 Extended Capability Register.
|
|
*
|
|
* User needs to understand the Intel VT-d specification to decode the
|
|
* register value.
|
|
*/
|
|
struct iommu_hw_info_vtd {
|
|
__u32 flags;
|
|
__u32 __reserved;
|
|
__aligned_u64 cap_reg;
|
|
__aligned_u64 ecap_reg;
|
|
};
|
|
|
|
/**
|
|
* enum iommu_hw_info_type - IOMMU Hardware Info Types
|
|
* @IOMMU_HW_INFO_TYPE_NONE: Used by the drivers that do not report hardware
|
|
* info
|
|
* @IOMMU_HW_INFO_TYPE_INTEL_VTD: Intel VT-d iommu info type
|
|
*/
|
|
enum iommu_hw_info_type {
|
|
IOMMU_HW_INFO_TYPE_NONE,
|
|
IOMMU_HW_INFO_TYPE_INTEL_VTD,
|
|
};
|
|
|
|
/**
|
|
* struct iommu_hw_info - ioctl(IOMMU_GET_HW_INFO)
|
|
* @size: sizeof(struct iommu_hw_info)
|
|
* @flags: Must be 0
|
|
* @dev_id: The device bound to the iommufd
|
|
* @data_len: Input the length of a user buffer in bytes. Output the length of
|
|
* data that kernel supports
|
|
* @data_uptr: User pointer to a user-space buffer used by the kernel to fill
|
|
* the iommu type specific hardware information data
|
|
* @out_data_type: Output the iommu hardware info type as defined in the enum
|
|
* iommu_hw_info_type.
|
|
* @__reserved: Must be 0
|
|
*
|
|
* Query an iommu type specific hardware information data from an iommu behind
|
|
* a given device that has been bound to iommufd. This hardware info data will
|
|
* be used to sync capabilities between the virtual iommu and the physical
|
|
* iommu, e.g. a nested translation setup needs to check the hardware info, so
|
|
* a guest stage-1 page table can be compatible with the physical iommu.
|
|
*
|
|
* To capture an iommu type specific hardware information data, @data_uptr and
|
|
* its length @data_len must be provided. Trailing bytes will be zeroed if the
|
|
* user buffer is larger than the data that kernel has. Otherwise, kernel only
|
|
* fills the buffer using the given length in @data_len. If the ioctl succeeds,
|
|
* @data_len will be updated to the length that kernel actually supports,
|
|
* @out_data_type will be filled to decode the data filled in the buffer
|
|
* pointed by @data_uptr. Input @data_len == zero is allowed.
|
|
*/
|
|
struct iommu_hw_info {
|
|
__u32 size;
|
|
__u32 flags;
|
|
__u32 dev_id;
|
|
__u32 data_len;
|
|
__aligned_u64 data_uptr;
|
|
__u32 out_data_type;
|
|
__u32 __reserved;
|
|
};
|
|
#define IOMMU_GET_HW_INFO _IO(IOMMUFD_TYPE, IOMMUFD_CMD_GET_HW_INFO)
|
|
#endif
|