xref: /qemu/include/hw/virtio/vhost-vdpa.h (revision 29b62a10)
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 typedef struct vhost_vdpa {
34     int device_fd;
35     int index;
36     uint32_t msg_type;
37     bool iotlb_batch_begin_sent;
38     uint32_t address_space_id;
39     MemoryListener listener;
40     struct vhost_vdpa_iova_range iova_range;
41     uint64_t acked_features;
42     bool shadow_vqs_enabled;
43     /* Vdpa must send shadow addresses as IOTLB key for data queues, not GPA */
44     bool shadow_data;
45     /* IOVA mapping used by the Shadow Virtqueue */
46     VhostIOVATree *iova_tree;
47     GPtrArray *shadow_vqs;
48     const VhostShadowVirtqueueOps *shadow_vq_ops;
49     void *shadow_vq_ops_opaque;
50     struct vhost_dev *dev;
51     VhostVDPAHostNotifier notifier[VIRTIO_QUEUE_MAX];
52 } VhostVDPA;
53 
54 int vhost_vdpa_get_iova_range(int fd, struct vhost_vdpa_iova_range *iova_range);
55 
56 int vhost_vdpa_dma_map(struct vhost_vdpa *v, uint32_t asid, hwaddr iova,
57                        hwaddr size, void *vaddr, bool readonly);
58 int vhost_vdpa_dma_unmap(struct vhost_vdpa *v, uint32_t asid, hwaddr iova,
59                          hwaddr size);
60 
61 #endif
62