xref: /openbmc/qemu/include/hw/virtio/vhost-vdpa.h (revision ae25ff41b72366248aa89bdc8be58aa86f67e4c3)
1 /*
2  * vhost-vdpa.h
3  *
4  * Copyright(c) 2017-2018 Intel Corporation.
5  * Copyright(c) 2020 Red Hat, Inc.
6  *
7  * This work is licensed under the terms of the GNU GPL, version 2 or later.
8  * See the COPYING file in the top-level directory.
9  *
10  */
11 
12 #ifndef HW_VIRTIO_VHOST_VDPA_H
13 #define HW_VIRTIO_VHOST_VDPA_H
14 
15 #include <gmodule.h>
16 
17 #include "hw/virtio/vhost-iova-tree.h"
18 #include "hw/virtio/vhost-shadow-virtqueue.h"
19 #include "hw/virtio/virtio.h"
20 #include "standard-headers/linux/vhost_types.h"
21 
22 /*
23  * ASID dedicated to map guest's addresses.  If SVQ is disabled it maps GPA to
24  * qemu's IOVA.  If SVQ is enabled it maps also the SVQ vring here
25  */
26 #define VHOST_VDPA_GUEST_PA_ASID 0
27 
28 typedef struct VhostVDPAHostNotifier {
29     MemoryRegion mr;
30     void *addr;
31 } VhostVDPAHostNotifier;
32 
33 /* Info shared by all vhost_vdpa device models */
34 typedef struct vhost_vdpa_shared {
35     struct vhost_vdpa_iova_range iova_range;
36 
37     /* IOVA mapping used by the Shadow Virtqueue */
38     VhostIOVATree *iova_tree;
39 } VhostVDPAShared;
40 
41 typedef struct vhost_vdpa {
42     int device_fd;
43     int index;
44     uint32_t msg_type;
45     bool iotlb_batch_begin_sent;
46     uint32_t address_space_id;
47     MemoryListener listener;
48     uint64_t acked_features;
49     bool shadow_vqs_enabled;
50     /* Vdpa must send shadow addresses as IOTLB key for data queues, not GPA */
51     bool shadow_data;
52     /* Device suspended successfully */
53     bool suspended;
54     VhostVDPAShared *shared;
55     GPtrArray *shadow_vqs;
56     const VhostShadowVirtqueueOps *shadow_vq_ops;
57     void *shadow_vq_ops_opaque;
58     struct vhost_dev *dev;
59     Error *migration_blocker;
60     VhostVDPAHostNotifier notifier[VIRTIO_QUEUE_MAX];
61     QLIST_HEAD(, vdpa_iommu) iommu_list;
62     IOMMUNotifier n;
63 } VhostVDPA;
64 
65 int vhost_vdpa_get_iova_range(int fd, struct vhost_vdpa_iova_range *iova_range);
66 int vhost_vdpa_set_vring_ready(struct vhost_vdpa *v, unsigned idx);
67 
68 int vhost_vdpa_dma_map(struct vhost_vdpa *v, uint32_t asid, hwaddr iova,
69                        hwaddr size, void *vaddr, bool readonly);
70 int vhost_vdpa_dma_unmap(struct vhost_vdpa *v, uint32_t asid, hwaddr iova,
71                          hwaddr size);
72 
73 typedef struct vdpa_iommu {
74     struct vhost_vdpa *dev;
75     IOMMUMemoryRegion *iommu_mr;
76     hwaddr iommu_offset;
77     IOMMUNotifier n;
78     QLIST_ENTRY(vdpa_iommu) iommu_next;
79 } VDPAIOMMUState;
80 
81 
82 #endif
83