1 /*
2  * VFIO BASE CONTAINER
3  *
4  * Copyright (C) 2023 Intel Corporation.
5  * Copyright Red Hat, Inc. 2023
6  *
7  * Authors: Yi Liu <yi.l.liu@intel.com>
8  *          Eric Auger <eric.auger@redhat.com>
9  *
10  * SPDX-License-Identifier: GPL-2.0-or-later
11  */
12 
13 #ifndef HW_VFIO_VFIO_CONTAINER_BASE_H
14 #define HW_VFIO_VFIO_CONTAINER_BASE_H
15 
16 #include "exec/memory.h"
17 
18 typedef struct VFIODevice VFIODevice;
19 typedef struct VFIOIOMMUClass VFIOIOMMUClass;
20 
21 typedef struct {
22     unsigned long *bitmap;
23     hwaddr size;
24     hwaddr pages;
25 } VFIOBitmap;
26 
27 typedef struct VFIOAddressSpace {
28     AddressSpace *as;
29     QLIST_HEAD(, VFIOContainerBase) containers;
30     QLIST_ENTRY(VFIOAddressSpace) list;
31 } VFIOAddressSpace;
32 
33 /*
34  * This is the base object for vfio container backends
35  */
36 typedef struct VFIOContainerBase {
37     Object parent;
38     VFIOAddressSpace *space;
39     MemoryListener listener;
40     Error *error;
41     bool initialized;
42     uint64_t dirty_pgsizes;
43     uint64_t max_dirty_bitmap_size;
44     unsigned long pgsizes;
45     unsigned int dma_max_mappings;
46     bool dirty_pages_supported;
47     QLIST_HEAD(, VFIOGuestIOMMU) giommu_list;
48     QLIST_HEAD(, VFIORamDiscardListener) vrdl_list;
49     QLIST_ENTRY(VFIOContainerBase) next;
50     QLIST_HEAD(, VFIODevice) device_list;
51     GList *iova_ranges;
52     NotifierWithReturn cpr_reboot_notifier;
53 } VFIOContainerBase;
54 
55 typedef struct VFIOGuestIOMMU {
56     VFIOContainerBase *bcontainer;
57     IOMMUMemoryRegion *iommu_mr;
58     hwaddr iommu_offset;
59     IOMMUNotifier n;
60     QLIST_ENTRY(VFIOGuestIOMMU) giommu_next;
61 } VFIOGuestIOMMU;
62 
63 typedef struct VFIORamDiscardListener {
64     VFIOContainerBase *bcontainer;
65     MemoryRegion *mr;
66     hwaddr offset_within_address_space;
67     hwaddr size;
68     uint64_t granularity;
69     RamDiscardListener listener;
70     QLIST_ENTRY(VFIORamDiscardListener) next;
71 } VFIORamDiscardListener;
72 
73 int vfio_container_dma_map(VFIOContainerBase *bcontainer,
74                            hwaddr iova, ram_addr_t size,
75                            void *vaddr, bool readonly);
76 int vfio_container_dma_unmap(VFIOContainerBase *bcontainer,
77                              hwaddr iova, ram_addr_t size,
78                              IOMMUTLBEntry *iotlb);
79 bool vfio_container_add_section_window(VFIOContainerBase *bcontainer,
80                                        MemoryRegionSection *section,
81                                        Error **errp);
82 void vfio_container_del_section_window(VFIOContainerBase *bcontainer,
83                                        MemoryRegionSection *section);
84 int vfio_container_set_dirty_page_tracking(VFIOContainerBase *bcontainer,
85                                            bool start, Error **errp);
86 int vfio_container_query_dirty_bitmap(const VFIOContainerBase *bcontainer,
87                    VFIOBitmap *vbmap, hwaddr iova, hwaddr size, Error **errp);
88 
89 GList *vfio_container_get_iova_ranges(const VFIOContainerBase *bcontainer);
90 
91 static inline uint64_t
vfio_container_get_page_size_mask(const VFIOContainerBase * bcontainer)92 vfio_container_get_page_size_mask(const VFIOContainerBase *bcontainer)
93 {
94     assert(bcontainer);
95     return bcontainer->pgsizes;
96 }
97 
98 #define TYPE_VFIO_IOMMU "vfio-iommu"
99 #define TYPE_VFIO_IOMMU_LEGACY TYPE_VFIO_IOMMU "-legacy"
100 #define TYPE_VFIO_IOMMU_SPAPR TYPE_VFIO_IOMMU "-spapr"
101 #define TYPE_VFIO_IOMMU_IOMMUFD TYPE_VFIO_IOMMU "-iommufd"
102 
103 OBJECT_DECLARE_TYPE(VFIOContainerBase, VFIOIOMMUClass, VFIO_IOMMU)
104 
105 struct VFIOIOMMUClass {
106     ObjectClass parent_class;
107 
108     /* Properties */
109     const char *hiod_typename;
110 
111     /* basic feature */
112     bool (*setup)(VFIOContainerBase *bcontainer, Error **errp);
113     int (*dma_map)(const VFIOContainerBase *bcontainer,
114                    hwaddr iova, ram_addr_t size,
115                    void *vaddr, bool readonly);
116     int (*dma_unmap)(const VFIOContainerBase *bcontainer,
117                      hwaddr iova, ram_addr_t size,
118                      IOMMUTLBEntry *iotlb);
119     bool (*attach_device)(const char *name, VFIODevice *vbasedev,
120                           AddressSpace *as, Error **errp);
121     void (*detach_device)(VFIODevice *vbasedev);
122 
123     /* migration feature */
124 
125     /**
126      * @set_dirty_page_tracking
127      *
128      * Start or stop dirty pages tracking on VFIO container
129      *
130      * @bcontainer: #VFIOContainerBase on which to de/activate dirty
131      *              page tracking
132      * @start: indicates whether to start or stop dirty pages tracking
133      * @errp: pointer to Error*, to store an error if it happens.
134      *
135      * Returns zero to indicate success and negative for error
136      */
137     int (*set_dirty_page_tracking)(const VFIOContainerBase *bcontainer,
138                                    bool start, Error **errp);
139     /**
140      * @query_dirty_bitmap
141      *
142      * Get bitmap of dirty pages from container
143      *
144      * @bcontainer: #VFIOContainerBase from which to get dirty pages
145      * @vbmap: #VFIOBitmap internal bitmap structure
146      * @iova: iova base address
147      * @size: size of iova range
148      * @errp: pointer to Error*, to store an error if it happens.
149      *
150      * Returns zero to indicate success and negative for error
151      */
152     int (*query_dirty_bitmap)(const VFIOContainerBase *bcontainer,
153                 VFIOBitmap *vbmap, hwaddr iova, hwaddr size, Error **errp);
154     /* PCI specific */
155     int (*pci_hot_reset)(VFIODevice *vbasedev, bool single);
156 
157     /* SPAPR specific */
158     bool (*add_window)(VFIOContainerBase *bcontainer,
159                        MemoryRegionSection *section,
160                        Error **errp);
161     void (*del_window)(VFIOContainerBase *bcontainer,
162                        MemoryRegionSection *section);
163     void (*release)(VFIOContainerBase *bcontainer);
164 };
165 #endif /* HW_VFIO_VFIO_CONTAINER_BASE_H */
166