diff options
Diffstat (limited to 'include/linux/vfio.h')
| -rw-r--r-- | include/linux/vfio.h | 357 |
1 files changed, 1 insertions, 356 deletions
diff --git a/include/linux/vfio.h b/include/linux/vfio.h index 0a4f180a11d8..ab9e86224c54 100644 --- a/include/linux/vfio.h +++ b/include/linux/vfio.h @@ -11,15 +11,10 @@ #ifndef VFIO_H #define VFIO_H -#include <linux/types.h> -#include <linux/ioctl.h> - -#define VFIO_API_VERSION 0 - -#ifdef __KERNEL__ /* Internal VFIO-core/bus driver API */ #include <linux/iommu.h> #include <linux/mm.h> +#include <uapi/linux/vfio.h> /** * struct vfio_device_ops - VFIO bus driver device callbacks @@ -92,354 +87,4 @@ extern void vfio_unregister_iommu_driver( TYPE tmp; \ offsetof(TYPE, MEMBER) + sizeof(tmp.MEMBER); }) \ -#endif /* __KERNEL__ */ - -/* Kernel & User level defines for VFIO IOCTLs. */ - -/* Extensions */ - -#define VFIO_TYPE1_IOMMU 1 - -/* - * The IOCTL interface is designed for extensibility by embedding the - * structure length (argsz) and flags into structures passed between - * kernel and userspace. We therefore use the _IO() macro for these - * defines to avoid implicitly embedding a size into the ioctl request. - * As structure fields are added, argsz will increase to match and flag - * bits will be defined to indicate additional fields with valid data. - * It's *always* the caller's responsibility to indicate the size of - * the structure passed by setting argsz appropriately. - */ - -#define VFIO_TYPE (';') -#define VFIO_BASE 100 - -/* -------- IOCTLs for VFIO file descriptor (/dev/vfio/vfio) -------- */ - -/** - * VFIO_GET_API_VERSION - _IO(VFIO_TYPE, VFIO_BASE + 0) - * - * Report the version of the VFIO API. This allows us to bump the entire - * API version should we later need to add or change features in incompatible - * ways. - * Return: VFIO_API_VERSION - * Availability: Always - */ -#define VFIO_GET_API_VERSION _IO(VFIO_TYPE, VFIO_BASE + 0) - -/** - * VFIO_CHECK_EXTENSION - _IOW(VFIO_TYPE, VFIO_BASE + 1, __u32) - * - * Check whether an extension is supported. - * Return: 0 if not supported, 1 (or some other positive integer) if supported. - * Availability: Always - */ -#define VFIO_CHECK_EXTENSION _IO(VFIO_TYPE, VFIO_BASE + 1) - -/** - * VFIO_SET_IOMMU - _IOW(VFIO_TYPE, VFIO_BASE + 2, __s32) - * - * Set the iommu to the given type. The type must be supported by an - * iommu driver as verified by calling CHECK_EXTENSION using the same - * type. A group must be set to this file descriptor before this - * ioctl is available. The IOMMU interfaces enabled by this call are - * specific to the value set. - * Return: 0 on success, -errno on failure - * Availability: When VFIO group attached - */ -#define VFIO_SET_IOMMU _IO(VFIO_TYPE, VFIO_BASE + 2) - -/* -------- IOCTLs for GROUP file descriptors (/dev/vfio/$GROUP) -------- */ - -/** - * VFIO_GROUP_GET_STATUS - _IOR(VFIO_TYPE, VFIO_BASE + 3, - * struct vfio_group_status) - * - * Retrieve information about the group. Fills in provided - * struct vfio_group_info. Caller sets argsz. - * Return: 0 on succes, -errno on failure. - * Availability: Always - */ -struct vfio_group_status { - __u32 argsz; - __u32 flags; -#define VFIO_GROUP_FLAGS_VIABLE (1 << 0) -#define VFIO_GROUP_FLAGS_CONTAINER_SET (1 << 1) -}; -#define VFIO_GROUP_GET_STATUS _IO(VFIO_TYPE, VFIO_BASE + 3) - -/** - * VFIO_GROUP_SET_CONTAINER - _IOW(VFIO_TYPE, VFIO_BASE + 4, __s32) - * - * Set the container for the VFIO group to the open VFIO file - * descriptor provided. Groups may only belong to a single - * container. Containers may, at their discretion, support multiple - * groups. Only when a container is set are all of the interfaces - * of the VFIO file descriptor and the VFIO group file descriptor - * available to the user. - * Return: 0 on success, -errno on failure. - * Availability: Always - */ -#define VFIO_GROUP_SET_CONTAINER _IO(VFIO_TYPE, VFIO_BASE + 4) - -/** - * VFIO_GROUP_UNSET_CONTAINER - _IO(VFIO_TYPE, VFIO_BASE + 5) - * - * Remove the group from the attached container. This is the - * opposite of the SET_CONTAINER call and returns the group to - * an initial state. All device file descriptors must be released - * prior to calling this interface. When removing the last group - * from a container, the IOMMU will be disabled and all state lost, - * effectively also returning the VFIO file descriptor to an initial - * state. - * Return: 0 on success, -errno on failure. - * Availability: When attached to container - */ -#define VFIO_GROUP_UNSET_CONTAINER _IO(VFIO_TYPE, VFIO_BASE + 5) - -/** - * VFIO_GROUP_GET_DEVICE_FD - _IOW(VFIO_TYPE, VFIO_BASE + 6, char) - * - * Return a new file descriptor for the device object described by - * the provided string. The string should match a device listed in - * the devices subdirectory of the IOMMU group sysfs entry. The - * group containing the device must already be added to this context. - * Return: new file descriptor on success, -errno on failure. - * Availability: When attached to container - */ -#define VFIO_GROUP_GET_DEVICE_FD _IO(VFIO_TYPE, VFIO_BASE + 6) - -/* --------------- IOCTLs for DEVICE file descriptors --------------- */ - -/** - * VFIO_DEVICE_GET_INFO - _IOR(VFIO_TYPE, VFIO_BASE + 7, - * struct vfio_device_info) - * - * Retrieve information about the device. Fills in provided - * struct vfio_device_info. Caller sets argsz. - * Return: 0 on success, -errno on failure. - */ -struct vfio_device_info { - __u32 argsz; - __u32 flags; -#define VFIO_DEVICE_FLAGS_RESET (1 << 0) /* Device supports reset */ -#define VFIO_DEVICE_FLAGS_PCI (1 << 1) /* vfio-pci device */ - __u32 num_regions; /* Max region index + 1 */ - __u32 num_irqs; /* Max IRQ index + 1 */ -}; -#define VFIO_DEVICE_GET_INFO _IO(VFIO_TYPE, VFIO_BASE + 7) - -/** - * VFIO_DEVICE_GET_REGION_INFO - _IOWR(VFIO_TYPE, VFIO_BASE + 8, - * struct vfio_region_info) - * - * Retrieve information about a device region. Caller provides - * struct vfio_region_info with index value set. Caller sets argsz. - * Implementation of region mapping is bus driver specific. This is - * intended to describe MMIO, I/O port, as well as bus specific - * regions (ex. PCI config space). Zero sized regions may be used - * to describe unimplemented regions (ex. unimplemented PCI BARs). - * Return: 0 on success, -errno on failure. - */ -struct vfio_region_info { - __u32 argsz; - __u32 flags; -#define VFIO_REGION_INFO_FLAG_READ (1 << 0) /* Region supports read */ -#define VFIO_REGION_INFO_FLAG_WRITE (1 << 1) /* Region supports write */ -#define VFIO_REGION_INFO_FLAG_MMAP (1 << 2) /* Region supports mmap */ - __u32 index; /* Region index */ - __u32 resv; /* Reserved for alignment */ - __u64 size; /* Region size (bytes) */ - __u64 offset; /* Region offset from start of device fd */ -}; -#define VFIO_DEVICE_GET_REGION_INFO _IO(VFIO_TYPE, VFIO_BASE + 8) - -/** - * VFIO_DEVICE_GET_IRQ_INFO - _IOWR(VFIO_TYPE, VFIO_BASE + 9, - * struct vfio_irq_info) - * - * Retrieve information about a device IRQ. Caller provides - * struct vfio_irq_info with index value set. Caller sets argsz. - * Implementation of IRQ mapping is bus driver specific. Indexes - * using multiple IRQs are primarily intended to support MSI-like - * interrupt blocks. Zero count irq blocks may be used to describe - * unimplemented interrupt types. - * - * The EVENTFD flag indicates the interrupt index supports eventfd based - * signaling. - * - * The MASKABLE flags indicates the index supports MASK and UNMASK - * actions described below. - * - * AUTOMASKED indicates that after signaling, the interrupt line is - * automatically masked by VFIO and the user needs to unmask the line - * to receive new interrupts. This is primarily intended to distinguish - * level triggered interrupts. - * - * The NORESIZE flag indicates that the interrupt lines within the index - * are setup as a set and new subindexes cannot be enabled without first - * disabling the entire index. This is used for interrupts like PCI MSI - * and MSI-X where the driver may only use a subset of the available - * indexes, but VFIO needs to enable a specific number of vectors - * upfront. In the case of MSI-X, where the user can enable MSI-X and - * then add and unmask vectors, it's up to userspace to make the decision - * whether to allocate the maximum supported number of vectors or tear - * down setup and incrementally increase the vectors as each is enabled. - */ -struct vfio_irq_info { - __u32 argsz; - __u32 flags; -#define VFIO_IRQ_INFO_EVENTFD (1 << 0) -#define VFIO_IRQ_INFO_MASKABLE (1 << 1) -#define VFIO_IRQ_INFO_AUTOMASKED (1 << 2) -#define VFIO_IRQ_INFO_NORESIZE (1 << 3) - __u32 index; /* IRQ index */ - __u32 count; /* Number of IRQs within this index */ -}; -#define VFIO_DEVICE_GET_IRQ_INFO _IO(VFIO_TYPE, VFIO_BASE + 9) - -/** - * VFIO_DEVICE_SET_IRQS - _IOW(VFIO_TYPE, VFIO_BASE + 10, struct vfio_irq_set) - * - * Set signaling, masking, and unmasking of interrupts. Caller provides - * struct vfio_irq_set with all fields set. 'start' and 'count' indicate - * the range of subindexes being specified. - * - * The DATA flags specify the type of data provided. If DATA_NONE, the - * operation performs the specified action immediately on the specified - * interrupt(s). For example, to unmask AUTOMASKED interrupt [0,0]: - * flags = (DATA_NONE|ACTION_UNMASK), index = 0, start = 0, count = 1. - * - * DATA_BOOL allows sparse support for the same on arrays of interrupts. - * For example, to mask interrupts [0,1] and [0,3] (but not [0,2]): - * flags = (DATA_BOOL|ACTION_MASK), index = 0, start = 1, count = 3, - * data = {1,0,1} - * - * DATA_EVENTFD binds the specified ACTION to the provided __s32 eventfd. - * A value of -1 can be used to either de-assign interrupts if already - * assigned or skip un-assigned interrupts. For example, to set an eventfd - * to be trigger for interrupts [0,0] and [0,2]: - * flags = (DATA_EVENTFD|ACTION_TRIGGER), index = 0, start = 0, count = 3, - * data = {fd1, -1, fd2} - * If index [0,1] is previously set, two count = 1 ioctls calls would be - * required to set [0,0] and [0,2] without changing [0,1]. - * - * Once a signaling mechanism is set, DATA_BOOL or DATA_NONE can be used - * with ACTION_TRIGGER to perform kernel level interrupt loopback testing - * from userspace (ie. simulate hardware triggering). - * - * Setting of an event triggering mechanism to userspace for ACTION_TRIGGER - * enables the interrupt index for the device. Individual subindex interrupts - * can be disabled using the -1 value for DATA_EVENTFD or the index can be - * disabled as a whole with: flags = (DATA_NONE|ACTION_TRIGGER), count = 0. - * - * Note that ACTION_[UN]MASK specify user->kernel signaling (irqfds) while - * ACTION_TRIGGER specifies kernel->user signaling. - */ -struct vfio_irq_set { - __u32 argsz; - __u32 flags; -#define VFIO_IRQ_SET_DATA_NONE (1 << 0) /* Data not present */ -#define VFIO_IRQ_SET_DATA_BOOL (1 << 1) /* Data is bool (u8) */ -#define VFIO_IRQ_SET_DATA_EVENTFD (1 << 2) /* Data is eventfd (s32) */ -#define VFIO_IRQ_SET_ACTION_MASK (1 << 3) /* Mask interrupt */ -#define VFIO_IRQ_SET_ACTION_UNMASK (1 << 4) /* Unmask interrupt */ -#define VFIO_IRQ_SET_ACTION_TRIGGER (1 << 5) /* Trigger interrupt */ - __u32 index; - __u32 start; - __u32 count; - __u8 data[]; -}; -#define VFIO_DEVICE_SET_IRQS _IO(VFIO_TYPE, VFIO_BASE + 10) - -#define VFIO_IRQ_SET_DATA_TYPE_MASK (VFIO_IRQ_SET_DATA_NONE | \ - VFIO_IRQ_SET_DATA_BOOL | \ - VFIO_IRQ_SET_DATA_EVENTFD) -#define VFIO_IRQ_SET_ACTION_TYPE_MASK (VFIO_IRQ_SET_ACTION_MASK | \ - VFIO_IRQ_SET_ACTION_UNMASK | \ - VFIO_IRQ_SET_ACTION_TRIGGER) -/** - * VFIO_DEVICE_RESET - _IO(VFIO_TYPE, VFIO_BASE + 11) - * - * Reset a device. - */ -#define VFIO_DEVICE_RESET _IO(VFIO_TYPE, VFIO_BASE + 11) - -/* - * The VFIO-PCI bus driver makes use of the following fixed region and - * IRQ index mapping. Unimplemented regions return a size of zero. - * Unimplemented IRQ types return a count of zero. - */ - -enum { - VFIO_PCI_BAR0_REGION_INDEX, - VFIO_PCI_BAR1_REGION_INDEX, - VFIO_PCI_BAR2_REGION_INDEX, - VFIO_PCI_BAR3_REGION_INDEX, - VFIO_PCI_BAR4_REGION_INDEX, - VFIO_PCI_BAR5_REGION_INDEX, - VFIO_PCI_ROM_REGION_INDEX, - VFIO_PCI_CONFIG_REGION_INDEX, - VFIO_PCI_NUM_REGIONS -}; - -enum { - VFIO_PCI_INTX_IRQ_INDEX, - VFIO_PCI_MSI_IRQ_INDEX, - VFIO_PCI_MSIX_IRQ_INDEX, - VFIO_PCI_NUM_IRQS -}; - -/* -------- API for Type1 VFIO IOMMU -------- */ - -/** - * VFIO_IOMMU_GET_INFO - _IOR(VFIO_TYPE, VFIO_BASE + 12, struct vfio_iommu_info) - * - * Retrieve information about the IOMMU object. Fills in provided - * struct vfio_iommu_info. Caller sets argsz. - * - * XXX Should we do these by CHECK_EXTENSION too? - */ -struct vfio_iommu_type1_info { - __u32 argsz; - __u32 flags; -#define VFIO_IOMMU_INFO_PGSIZES (1 << 0) /* supported page sizes info */ - __u64 iova_pgsizes; /* Bitmap of supported page sizes */ -}; - -#define VFIO_IOMMU_GET_INFO _IO(VFIO_TYPE, VFIO_BASE + 12) - -/** - * VFIO_IOMMU_MAP_DMA - _IOW(VFIO_TYPE, VFIO_BASE + 13, struct vfio_dma_map) - * - * Map process virtual addresses to IO virtual addresses using the - * provided struct vfio_dma_map. Caller sets argsz. READ &/ WRITE required. - */ -struct vfio_iommu_type1_dma_map { - __u32 argsz; - __u32 flags; -#define VFIO_DMA_MAP_FLAG_READ (1 << 0) /* readable from device */ -#define VFIO_DMA_MAP_FLAG_WRITE (1 << 1) /* writable from device */ - __u64 vaddr; /* Process virtual address */ - __u64 iova; /* IO virtual address */ - __u64 size; /* Size of mapping (bytes) */ -}; - -#define VFIO_IOMMU_MAP_DMA _IO(VFIO_TYPE, VFIO_BASE + 13) - -/** - * VFIO_IOMMU_UNMAP_DMA - _IOW(VFIO_TYPE, VFIO_BASE + 14, struct vfio_dma_unmap) - * - * Unmap IO virtual addresses using the provided struct vfio_dma_unmap. - * Caller sets argsz. - */ -struct vfio_iommu_type1_dma_unmap { - __u32 argsz; - __u32 flags; - __u64 iova; /* IO virtual address */ - __u64 size; /* Size of mapping (bytes) */ -}; - -#define VFIO_IOMMU_UNMAP_DMA _IO(VFIO_TYPE, VFIO_BASE + 14) - #endif /* VFIO_H */ |