150 lines
4.4 KiB
C
150 lines
4.4 KiB
C
/*
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* common header for vfio based device assignment support
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*
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* Copyright Red Hat, Inc. 2012
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*
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* Authors:
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* Alex Williamson <alex.williamson@redhat.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2. See
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* the COPYING file in the top-level directory.
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*
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* Based on qemu-kvm device-assignment:
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* Adapted for KVM by Qumranet.
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* Copyright (c) 2007, Neocleus, Alex Novik (alex@neocleus.com)
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* Copyright (c) 2007, Neocleus, Guy Zana (guy@neocleus.com)
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* Copyright (C) 2008, Qumranet, Amit Shah (amit.shah@qumranet.com)
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* Copyright (C) 2008, Red Hat, Amit Shah (amit.shah@redhat.com)
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* Copyright (C) 2008, IBM, Muli Ben-Yehuda (muli@il.ibm.com)
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*/
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#ifndef HW_VFIO_VFIO_COMMON_H
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#define HW_VFIO_VFIO_COMMON_H
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#include "qemu-common.h"
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#include "exec/address-spaces.h"
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#include "exec/memory.h"
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#include "qemu/queue.h"
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#include "qemu/notify.h"
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/*#define DEBUG_VFIO*/
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#ifdef DEBUG_VFIO
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#define DPRINTF(fmt, ...) \
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do { fprintf(stderr, "vfio: " fmt, ## __VA_ARGS__); } while (0)
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#else
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#define DPRINTF(fmt, ...) \
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do { } while (0)
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#endif
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/* Extra debugging, trap acceleration paths for more logging */
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#define VFIO_ALLOW_KVM_INTX 1
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#define VFIO_ALLOW_KVM_MSI 1
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#define VFIO_ALLOW_KVM_MSIX 1
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enum {
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VFIO_DEVICE_TYPE_PCI = 0,
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VFIO_DEVICE_TYPE_PLATFORM = 1,
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};
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typedef struct VFIORegion {
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struct VFIODevice *vbasedev;
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off_t fd_offset; /* offset of region within device fd */
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MemoryRegion mem; /* slow, read/write access */
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MemoryRegion mmap_mem; /* direct mapped access */
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void *mmap;
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size_t size;
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uint32_t flags; /* VFIO region flags (rd/wr/mmap) */
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uint8_t nr; /* cache the region number for debug */
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} VFIORegion;
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typedef struct VFIOAddressSpace {
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AddressSpace *as;
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QLIST_HEAD(, VFIOContainer) containers;
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QLIST_ENTRY(VFIOAddressSpace) list;
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} VFIOAddressSpace;
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struct VFIOGroup;
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typedef struct VFIOType1 {
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MemoryListener listener;
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int error;
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bool initialized;
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} VFIOType1;
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typedef struct VFIOContainer {
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VFIOAddressSpace *space;
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int fd; /* /dev/vfio/vfio, empowered by the attached groups */
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struct {
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/* enable abstraction to support various iommu backends */
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union {
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VFIOType1 type1;
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};
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void (*release)(struct VFIOContainer *);
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} iommu_data;
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QLIST_HEAD(, VFIOGuestIOMMU) giommu_list;
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QLIST_HEAD(, VFIOGroup) group_list;
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QLIST_ENTRY(VFIOContainer) next;
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} VFIOContainer;
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typedef struct VFIOGuestIOMMU {
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VFIOContainer *container;
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MemoryRegion *iommu;
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Notifier n;
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QLIST_ENTRY(VFIOGuestIOMMU) giommu_next;
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} VFIOGuestIOMMU;
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typedef struct VFIODeviceOps VFIODeviceOps;
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typedef struct VFIODevice {
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QLIST_ENTRY(VFIODevice) next;
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struct VFIOGroup *group;
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char *name;
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int fd;
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int type;
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bool reset_works;
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bool needs_reset;
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bool allow_mmap;
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VFIODeviceOps *ops;
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unsigned int num_irqs;
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unsigned int num_regions;
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unsigned int flags;
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} VFIODevice;
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struct VFIODeviceOps {
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void (*vfio_compute_needs_reset)(VFIODevice *vdev);
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int (*vfio_hot_reset_multi)(VFIODevice *vdev);
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void (*vfio_eoi)(VFIODevice *vdev);
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};
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typedef struct VFIOGroup {
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int fd;
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int groupid;
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VFIOContainer *container;
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QLIST_HEAD(, VFIODevice) device_list;
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QLIST_ENTRY(VFIOGroup) next;
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QLIST_ENTRY(VFIOGroup) container_next;
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} VFIOGroup;
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void vfio_put_base_device(VFIODevice *vbasedev);
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void vfio_disable_irqindex(VFIODevice *vbasedev, int index);
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void vfio_unmask_single_irqindex(VFIODevice *vbasedev, int index);
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void vfio_mask_single_irqindex(VFIODevice *vbasedev, int index);
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void vfio_region_write(void *opaque, hwaddr addr,
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uint64_t data, unsigned size);
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uint64_t vfio_region_read(void *opaque,
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hwaddr addr, unsigned size);
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int vfio_mmap_region(Object *vdev, VFIORegion *region,
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MemoryRegion *mem, MemoryRegion *submem,
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void **map, size_t size, off_t offset,
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const char *name);
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void vfio_reset_handler(void *opaque);
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VFIOGroup *vfio_get_group(int groupid, AddressSpace *as);
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void vfio_put_group(VFIOGroup *group);
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int vfio_get_device(VFIOGroup *group, const char *name,
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VFIODevice *vbasedev);
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extern const MemoryRegionOps vfio_region_ops;
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extern QLIST_HEAD(vfio_group_head, VFIOGroup) vfio_group_list;
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extern QLIST_HEAD(vfio_as_head, VFIOAddressSpace) vfio_address_spaces;
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#endif /* !HW_VFIO_VFIO_COMMON_H */
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