xref: /openbmc/qemu/include/hw/virtio/vhost-vdpa.h (revision a6e823d40eb75110a8a1c6eee9650309412a5e9c)
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 
40     /* Vdpa must send shadow addresses as IOTLB key for data queues, not GPA */
41     bool shadow_data;
42 } VhostVDPAShared;
43 
44 typedef struct vhost_vdpa {
45     int device_fd;
46     int index;
47     uint32_t msg_type;
48     bool iotlb_batch_begin_sent;
49     uint32_t address_space_id;
50     MemoryListener listener;
51     uint64_t acked_features;
52     bool shadow_vqs_enabled;
53     /* Device suspended successfully */
54     bool suspended;
55     VhostVDPAShared *shared;
56     GPtrArray *shadow_vqs;
57     const VhostShadowVirtqueueOps *shadow_vq_ops;
58     void *shadow_vq_ops_opaque;
59     struct vhost_dev *dev;
60     Error *migration_blocker;
61     VhostVDPAHostNotifier notifier[VIRTIO_QUEUE_MAX];
62     QLIST_HEAD(, vdpa_iommu) iommu_list;
63     IOMMUNotifier n;
64 } VhostVDPA;
65 
66 int vhost_vdpa_get_iova_range(int fd, struct vhost_vdpa_iova_range *iova_range);
67 int vhost_vdpa_set_vring_ready(struct vhost_vdpa *v, unsigned idx);
68 
69 int vhost_vdpa_dma_map(struct vhost_vdpa *v, uint32_t asid, hwaddr iova,
70                        hwaddr size, void *vaddr, bool readonly);
71 int vhost_vdpa_dma_unmap(struct vhost_vdpa *v, uint32_t asid, hwaddr iova,
72                          hwaddr size);
73 
74 typedef struct vdpa_iommu {
75     struct vhost_vdpa *dev;
76     IOMMUMemoryRegion *iommu_mr;
77     hwaddr iommu_offset;
78     IOMMUNotifier n;
79     QLIST_ENTRY(vdpa_iommu) iommu_next;
80 } VDPAIOMMUState;
81 
82 
83 #endif
84