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/*
* vhost-vdpa.h
*
* Copyright(c) 2017-2018 Intel Corporation.
* Copyright(c) 2020 Red Hat, Inc.
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*
*/
#ifndef HW_VIRTIO_VHOST_VDPA_H
#define HW_VIRTIO_VHOST_VDPA_H
#include <gmodule.h>
#include "hw/virtio/vhost-iova-tree.h"
#include "hw/virtio/vhost-shadow-virtqueue.h"
#include "hw/virtio/virtio.h"
#include "standard-headers/linux/vhost_types.h"
/*
* ASID dedicated to map guest's addresses. If SVQ is disabled it maps GPA to
* qemu's IOVA. If SVQ is enabled it maps also the SVQ vring here
*/
#define VHOST_VDPA_GUEST_PA_ASID 0
typedef struct VhostVDPAHostNotifier {
MemoryRegion mr;
void *addr;
} VhostVDPAHostNotifier;
typedef enum SVQTransitionState {
SVQ_TSTATE_DISABLING = -1,
SVQ_TSTATE_DONE,
SVQ_TSTATE_ENABLING
} SVQTransitionState;
/* Info shared by all vhost_vdpa device models */
typedef struct vhost_vdpa_shared {
int device_fd;
MemoryListener listener;
struct vhost_vdpa_iova_range iova_range;
QLIST_HEAD(, vdpa_iommu) iommu_list;
/* IOVA mapping used by the Shadow Virtqueue */
VhostIOVATree *iova_tree;
/* Copy of backend features */
uint64_t backend_cap;
bool iotlb_batch_begin_sent;
/* Vdpa must send shadow addresses as IOTLB key for data queues, not GPA */
bool shadow_data;
/* SVQ switching is in progress, or already completed? */
SVQTransitionState svq_switching;
} VhostVDPAShared;
typedef struct vhost_vdpa {
int index;
uint32_t address_space_id;
uint64_t acked_features;
bool shadow_vqs_enabled;
/* Device suspended successfully */
bool suspended;
VhostVDPAShared *shared;
GPtrArray *shadow_vqs;
const VhostShadowVirtqueueOps *shadow_vq_ops;
void *shadow_vq_ops_opaque;
struct vhost_dev *dev;
Error *migration_blocker;
VhostVDPAHostNotifier notifier[VIRTIO_QUEUE_MAX];
IOMMUNotifier n;
} VhostVDPA;
int vhost_vdpa_get_iova_range(int fd, struct vhost_vdpa_iova_range *iova_range);
int vhost_vdpa_set_vring_ready(struct vhost_vdpa *v, unsigned idx);
int vhost_vdpa_dma_map(VhostVDPAShared *s, uint32_t asid, hwaddr iova,
hwaddr size, void *vaddr, bool readonly);
int vhost_vdpa_dma_unmap(VhostVDPAShared *s, uint32_t asid, hwaddr iova,
hwaddr size);
typedef struct vdpa_iommu {
VhostVDPAShared *dev_shared;
IOMMUMemoryRegion *iommu_mr;
hwaddr iommu_offset;
IOMMUNotifier n;
QLIST_ENTRY(vdpa_iommu) iommu_next;
} VDPAIOMMUState;
#endif
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