| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Jason Gunthorpe | 494 | 40.46% | 20 | 33.33% |
| Alex Williamson | 407 | 33.33% | 11 | 18.33% |
| Yishai Hadas | 87 | 7.13% | 4 | 6.67% |
| Kirti Wankhede | 52 | 4.26% | 3 | 5.00% |
| Kevin Tian | 48 | 3.93% | 1 | 1.67% |
| Zhao Yan | 19 | 1.56% | 1 | 1.67% |
| Alexey Kardashevskiy | 16 | 1.31% | 1 | 1.67% |
| Vijay Mohan Pandarathil | 14 | 1.15% | 1 | 1.67% |
| Jike Song | 14 | 1.15% | 2 | 3.33% |
| Antonios Motakis | 13 | 1.06% | 3 | 5.00% |
| Matthew Rosato | 12 | 0.98% | 1 | 1.67% |
| Nicolin Chen | 10 | 0.82% | 4 | 6.67% |
| Anthony DeRossi | 10 | 0.82% | 1 | 1.67% |
| Yi L Liu | 9 | 0.74% | 1 | 1.67% |
| Christoph Hellwig | 5 | 0.41% | 1 | 1.67% |
| Simon Horman | 3 | 0.25% | 1 | 1.67% |
| David Howells | 3 | 0.25% | 1 | 1.67% |
| Arnd Bergmann | 2 | 0.16% | 1 | 1.67% |
| Thomas Gleixner | 2 | 0.16% | 1 | 1.67% |
| Ingo Molnar | 1 | 0.08% | 1 | 1.67% |
| Total | 1221 | 60 |
/* SPDX-License-Identifier: GPL-2.0-only */ /* * VFIO API definition * * Copyright (C) 2012 Red Hat, Inc. All rights reserved. * Author: Alex Williamson <alex.williamson@redhat.com> */ #ifndef VFIO_H #define VFIO_H #include <linux/iommu.h> #include <linux/mm.h> #include <linux/workqueue.h> #include <linux/poll.h> #include <uapi/linux/vfio.h> #include <linux/iova_bitmap.h> struct kvm; struct iommufd_ctx; struct iommufd_device; struct iommufd_access; /* * VFIO devices can be placed in a set, this allows all devices to share this * structure and the VFIO core will provide a lock that is held around * open_device()/close_device() for all devices in the set. */ struct vfio_device_set { void *set_id; struct mutex lock; struct list_head device_list; unsigned int device_count; }; struct vfio_device { struct device *dev; const struct vfio_device_ops *ops; /* * mig_ops/log_ops is a static property of the vfio_device which must * be set prior to registering the vfio_device. */ const struct vfio_migration_ops *mig_ops; const struct vfio_log_ops *log_ops; struct vfio_group *group; struct vfio_device_set *dev_set; struct list_head dev_set_list; unsigned int migration_flags; struct kvm *kvm; /* Members below here are private, not for driver use */ unsigned int index; struct device device; /* device.kref covers object life circle */ refcount_t refcount; /* user count on registered device*/ unsigned int open_count; struct completion comp; struct list_head group_next; struct list_head iommu_entry; struct iommufd_access *iommufd_access; void (*put_kvm)(struct kvm *kvm); #if IS_ENABLED(CONFIG_IOMMUFD) struct iommufd_device *iommufd_device; bool iommufd_attached; #endif }; /** * struct vfio_device_ops - VFIO bus driver device callbacks * * @name: Name of the device driver. * @init: initialize private fields in device structure * @release: Reclaim private fields in device structure * @bind_iommufd: Called when binding the device to an iommufd * @unbind_iommufd: Opposite of bind_iommufd * @attach_ioas: Called when attaching device to an IOAS/HWPT managed by the * bound iommufd. Undo in unbind_iommufd. * @open_device: Called when the first file descriptor is opened for this device * @close_device: Opposite of open_device * @read: Perform read(2) on device file descriptor * @write: Perform write(2) on device file descriptor * @ioctl: Perform ioctl(2) on device file descriptor, supporting VFIO_DEVICE_* * operations documented below * @mmap: Perform mmap(2) on a region of the device file descriptor * @request: Request for the bus driver to release the device * @match: Optional device name match callback (return: 0 for no-match, >0 for * match, -errno for abort (ex. match with insufficient or incorrect * additional args) * @dma_unmap: Called when userspace unmaps IOVA from the container * this device is attached to. * @device_feature: Optional, fill in the VFIO_DEVICE_FEATURE ioctl */ struct vfio_device_ops { char *name; int (*init)(struct vfio_device *vdev); void (*release)(struct vfio_device *vdev); int (*bind_iommufd)(struct vfio_device *vdev, struct iommufd_ctx *ictx, u32 *out_device_id); void (*unbind_iommufd)(struct vfio_device *vdev); int (*attach_ioas)(struct vfio_device *vdev, u32 *pt_id); int (*open_device)(struct vfio_device *vdev); void (*close_device)(struct vfio_device *vdev); ssize_t (*read)(struct vfio_device *vdev, char __user *buf, size_t count, loff_t *ppos); ssize_t (*write)(struct vfio_device *vdev, const char __user *buf, size_t count, loff_t *size); long (*ioctl)(struct vfio_device *vdev, unsigned int cmd, unsigned long arg); int (*mmap)(struct vfio_device *vdev, struct vm_area_struct *vma); void (*request)(struct vfio_device *vdev, unsigned int count); int (*match)(struct vfio_device *vdev, char *buf); void (*dma_unmap)(struct vfio_device *vdev, u64 iova, u64 length); int (*device_feature)(struct vfio_device *device, u32 flags, void __user *arg, size_t argsz); }; #if IS_ENABLED(CONFIG_IOMMUFD) int vfio_iommufd_physical_bind(struct vfio_device *vdev, struct iommufd_ctx *ictx, u32 *out_device_id); void vfio_iommufd_physical_unbind(struct vfio_device *vdev); int vfio_iommufd_physical_attach_ioas(struct vfio_device *vdev, u32 *pt_id); int vfio_iommufd_emulated_bind(struct vfio_device *vdev, struct iommufd_ctx *ictx, u32 *out_device_id); void vfio_iommufd_emulated_unbind(struct vfio_device *vdev); int vfio_iommufd_emulated_attach_ioas(struct vfio_device *vdev, u32 *pt_id); #else #define vfio_iommufd_physical_bind \ ((int (*)(struct vfio_device *vdev, struct iommufd_ctx *ictx, \ u32 *out_device_id)) NULL) #define vfio_iommufd_physical_unbind \ ((void (*)(struct vfio_device *vdev)) NULL) #define vfio_iommufd_physical_attach_ioas \ ((int (*)(struct vfio_device *vdev, u32 *pt_id)) NULL) #define vfio_iommufd_emulated_bind \ ((int (*)(struct vfio_device *vdev, struct iommufd_ctx *ictx, \ u32 *out_device_id)) NULL) #define vfio_iommufd_emulated_unbind \ ((void (*)(struct vfio_device *vdev)) NULL) #define vfio_iommufd_emulated_attach_ioas \ ((int (*)(struct vfio_device *vdev, u32 *pt_id)) NULL) #endif /** * struct vfio_migration_ops - VFIO bus device driver migration callbacks * * @migration_set_state: Optional callback to change the migration state for * devices that support migration. It's mandatory for * VFIO_DEVICE_FEATURE_MIGRATION migration support. * The returned FD is used for data transfer according to the FSM * definition. The driver is responsible to ensure that FD reaches end * of stream or error whenever the migration FSM leaves a data transfer * state or before close_device() returns. * @migration_get_state: Optional callback to get the migration state for * devices that support migration. It's mandatory for * VFIO_DEVICE_FEATURE_MIGRATION migration support. * @migration_get_data_size: Optional callback to get the estimated data * length that will be required to complete stop copy. It's mandatory for * VFIO_DEVICE_FEATURE_MIGRATION migration support. */ struct vfio_migration_ops { struct file *(*migration_set_state)( struct vfio_device *device, enum vfio_device_mig_state new_state); int (*migration_get_state)(struct vfio_device *device, enum vfio_device_mig_state *curr_state); int (*migration_get_data_size)(struct vfio_device *device, unsigned long *stop_copy_length); }; /** * struct vfio_log_ops - VFIO bus device driver logging callbacks * * @log_start: Optional callback to ask the device start DMA logging. * @log_stop: Optional callback to ask the device stop DMA logging. * @log_read_and_clear: Optional callback to ask the device read * and clear the dirty DMAs in some given range. * * The vfio core implementation of the DEVICE_FEATURE_DMA_LOGGING_ set * of features does not track logging state relative to the device, * therefore the device implementation of vfio_log_ops must handle * arbitrary user requests. This includes rejecting subsequent calls * to log_start without an intervening log_stop, as well as graceful * handling of log_stop and log_read_and_clear from invalid states. */ struct vfio_log_ops { int (*log_start)(struct vfio_device *device, struct rb_root_cached *ranges, u32 nnodes, u64 *page_size); int (*log_stop)(struct vfio_device *device); int (*log_read_and_clear)(struct vfio_device *device, unsigned long iova, unsigned long length, struct iova_bitmap *dirty); }; /** * vfio_check_feature - Validate user input for the VFIO_DEVICE_FEATURE ioctl * @flags: Arg from the device_feature op * @argsz: Arg from the device_feature op * @supported_ops: Combination of VFIO_DEVICE_FEATURE_GET and SET the driver * supports * @minsz: Minimum data size the driver accepts * * For use in a driver's device_feature op. Checks that the inputs to the * VFIO_DEVICE_FEATURE ioctl are correct for the driver's feature. Returns 1 if * the driver should execute the get or set, otherwise the relevant * value should be returned. */ static inline int vfio_check_feature(u32 flags, size_t argsz, u32 supported_ops, size_t minsz) { if ((flags & (VFIO_DEVICE_FEATURE_GET | VFIO_DEVICE_FEATURE_SET)) & ~supported_ops) return -EINVAL; if (flags & VFIO_DEVICE_FEATURE_PROBE) return 0; /* Without PROBE one of GET or SET must be requested */ if (!(flags & (VFIO_DEVICE_FEATURE_GET | VFIO_DEVICE_FEATURE_SET))) return -EINVAL; if (argsz < minsz) return -EINVAL; return 1; } struct vfio_device *_vfio_alloc_device(size_t size, struct device *dev, const struct vfio_device_ops *ops); #define vfio_alloc_device(dev_struct, member, dev, ops) \ container_of(_vfio_alloc_device(sizeof(struct dev_struct) + \ BUILD_BUG_ON_ZERO(offsetof( \ struct dev_struct, member)), \ dev, ops), \ struct dev_struct, member) static inline void vfio_put_device(struct vfio_device *device) { put_device(&device->device); } int vfio_register_group_dev(struct vfio_device *device); int vfio_register_emulated_iommu_dev(struct vfio_device *device); void vfio_unregister_group_dev(struct vfio_device *device); int vfio_assign_device_set(struct vfio_device *device, void *set_id); unsigned int vfio_device_set_open_count(struct vfio_device_set *dev_set); int vfio_mig_get_next_state(struct vfio_device *device, enum vfio_device_mig_state cur_fsm, enum vfio_device_mig_state new_fsm, enum vfio_device_mig_state *next_fsm); /* * External user API */ struct iommu_group *vfio_file_iommu_group(struct file *file); bool vfio_file_is_group(struct file *file); bool vfio_file_enforced_coherent(struct file *file); void vfio_file_set_kvm(struct file *file, struct kvm *kvm); bool vfio_file_has_dev(struct file *file, struct vfio_device *device); #define VFIO_PIN_PAGES_MAX_ENTRIES (PAGE_SIZE/sizeof(unsigned long)) int vfio_pin_pages(struct vfio_device *device, dma_addr_t iova, int npage, int prot, struct page **pages); void vfio_unpin_pages(struct vfio_device *device, dma_addr_t iova, int npage); int vfio_dma_rw(struct vfio_device *device, dma_addr_t iova, void *data, size_t len, bool write); /* * Sub-module helpers */ struct vfio_info_cap { struct vfio_info_cap_header *buf; size_t size; }; struct vfio_info_cap_header *vfio_info_cap_add(struct vfio_info_cap *caps, size_t size, u16 id, u16 version); void vfio_info_cap_shift(struct vfio_info_cap *caps, size_t offset); int vfio_info_add_capability(struct vfio_info_cap *caps, struct vfio_info_cap_header *cap, size_t size); int vfio_set_irqs_validate_and_prepare(struct vfio_irq_set *hdr, int num_irqs, int max_irq_type, size_t *data_size); /* * IRQfd - generic */ struct virqfd { void *opaque; struct eventfd_ctx *eventfd; int (*handler)(void *, void *); void (*thread)(void *, void *); void *data; struct work_struct inject; wait_queue_entry_t wait; poll_table pt; struct work_struct shutdown; struct virqfd **pvirqfd; }; int vfio_virqfd_enable(void *opaque, int (*handler)(void *, void *), void (*thread)(void *, void *), void *data, struct virqfd **pvirqfd, int fd); void vfio_virqfd_disable(struct virqfd **pvirqfd); #endif /* VFIO_H */