1 | /* SPDX-License-Identifier: BSD-3-Clause */ |
2 | /* |
3 | * Virtio-iommu definition v0.12 |
4 | * |
5 | * Copyright (C) 2019 Arm Ltd. |
6 | */ |
7 | #ifndef _UAPI_LINUX_VIRTIO_IOMMU_H |
8 | #define _UAPI_LINUX_VIRTIO_IOMMU_H |
9 | |
10 | #include <linux/types.h> |
11 | |
12 | /* Feature bits */ |
13 | #define VIRTIO_IOMMU_F_INPUT_RANGE 0 |
14 | #define VIRTIO_IOMMU_F_DOMAIN_RANGE 1 |
15 | #define VIRTIO_IOMMU_F_MAP_UNMAP 2 |
16 | #define VIRTIO_IOMMU_F_BYPASS 3 |
17 | #define VIRTIO_IOMMU_F_PROBE 4 |
18 | #define VIRTIO_IOMMU_F_MMIO 5 |
19 | #define VIRTIO_IOMMU_F_BYPASS_CONFIG 6 |
20 | |
21 | struct virtio_iommu_range_64 { |
22 | __le64 start; |
23 | __le64 end; |
24 | }; |
25 | |
26 | struct virtio_iommu_range_32 { |
27 | __le32 start; |
28 | __le32 end; |
29 | }; |
30 | |
31 | struct virtio_iommu_config { |
32 | /* Supported page sizes */ |
33 | __le64 page_size_mask; |
34 | /* Supported IOVA range */ |
35 | struct virtio_iommu_range_64 input_range; |
36 | /* Max domain ID size */ |
37 | struct virtio_iommu_range_32 domain_range; |
38 | /* Probe buffer size */ |
39 | __le32 probe_size; |
40 | __u8 bypass; |
41 | __u8 reserved[3]; |
42 | }; |
43 | |
44 | /* Request types */ |
45 | #define VIRTIO_IOMMU_T_ATTACH 0x01 |
46 | #define VIRTIO_IOMMU_T_DETACH 0x02 |
47 | #define VIRTIO_IOMMU_T_MAP 0x03 |
48 | #define VIRTIO_IOMMU_T_UNMAP 0x04 |
49 | #define VIRTIO_IOMMU_T_PROBE 0x05 |
50 | |
51 | /* Status types */ |
52 | #define VIRTIO_IOMMU_S_OK 0x00 |
53 | #define VIRTIO_IOMMU_S_IOERR 0x01 |
54 | #define VIRTIO_IOMMU_S_UNSUPP 0x02 |
55 | #define VIRTIO_IOMMU_S_DEVERR 0x03 |
56 | #define VIRTIO_IOMMU_S_INVAL 0x04 |
57 | #define VIRTIO_IOMMU_S_RANGE 0x05 |
58 | #define VIRTIO_IOMMU_S_NOENT 0x06 |
59 | #define VIRTIO_IOMMU_S_FAULT 0x07 |
60 | #define VIRTIO_IOMMU_S_NOMEM 0x08 |
61 | |
62 | struct virtio_iommu_req_head { |
63 | __u8 type; |
64 | __u8 reserved[3]; |
65 | }; |
66 | |
67 | struct virtio_iommu_req_tail { |
68 | __u8 status; |
69 | __u8 reserved[3]; |
70 | }; |
71 | |
72 | #define VIRTIO_IOMMU_ATTACH_F_BYPASS (1 << 0) |
73 | |
74 | struct virtio_iommu_req_attach { |
75 | struct virtio_iommu_req_head head; |
76 | __le32 domain; |
77 | __le32 endpoint; |
78 | __le32 flags; |
79 | __u8 reserved[4]; |
80 | struct virtio_iommu_req_tail tail; |
81 | }; |
82 | |
83 | struct virtio_iommu_req_detach { |
84 | struct virtio_iommu_req_head head; |
85 | __le32 domain; |
86 | __le32 endpoint; |
87 | __u8 reserved[8]; |
88 | struct virtio_iommu_req_tail tail; |
89 | }; |
90 | |
91 | #define VIRTIO_IOMMU_MAP_F_READ (1 << 0) |
92 | #define VIRTIO_IOMMU_MAP_F_WRITE (1 << 1) |
93 | #define VIRTIO_IOMMU_MAP_F_MMIO (1 << 2) |
94 | |
95 | #define VIRTIO_IOMMU_MAP_F_MASK (VIRTIO_IOMMU_MAP_F_READ | \ |
96 | VIRTIO_IOMMU_MAP_F_WRITE | \ |
97 | VIRTIO_IOMMU_MAP_F_MMIO) |
98 | |
99 | struct virtio_iommu_req_map { |
100 | struct virtio_iommu_req_head head; |
101 | __le32 domain; |
102 | __le64 virt_start; |
103 | __le64 virt_end; |
104 | __le64 phys_start; |
105 | __le32 flags; |
106 | struct virtio_iommu_req_tail tail; |
107 | }; |
108 | |
109 | struct virtio_iommu_req_unmap { |
110 | struct virtio_iommu_req_head head; |
111 | __le32 domain; |
112 | __le64 virt_start; |
113 | __le64 virt_end; |
114 | __u8 reserved[4]; |
115 | struct virtio_iommu_req_tail tail; |
116 | }; |
117 | |
118 | #define VIRTIO_IOMMU_PROBE_T_NONE 0 |
119 | #define VIRTIO_IOMMU_PROBE_T_RESV_MEM 1 |
120 | |
121 | #define VIRTIO_IOMMU_PROBE_T_MASK 0xfff |
122 | |
123 | struct virtio_iommu_probe_property { |
124 | __le16 type; |
125 | __le16 length; |
126 | }; |
127 | |
128 | #define VIRTIO_IOMMU_RESV_MEM_T_RESERVED 0 |
129 | #define VIRTIO_IOMMU_RESV_MEM_T_MSI 1 |
130 | |
131 | struct virtio_iommu_probe_resv_mem { |
132 | struct virtio_iommu_probe_property head; |
133 | __u8 subtype; |
134 | __u8 reserved[3]; |
135 | __le64 start; |
136 | __le64 end; |
137 | }; |
138 | |
139 | struct virtio_iommu_req_probe { |
140 | struct virtio_iommu_req_head head; |
141 | __le32 endpoint; |
142 | __u8 reserved[64]; |
143 | |
144 | __u8 properties[]; |
145 | |
146 | /* |
147 | * Tail follows the variable-length properties array. No padding, |
148 | * property lengths are all aligned on 8 bytes. |
149 | */ |
150 | }; |
151 | |
152 | /* Fault types */ |
153 | #define VIRTIO_IOMMU_FAULT_R_UNKNOWN 0 |
154 | #define VIRTIO_IOMMU_FAULT_R_DOMAIN 1 |
155 | #define VIRTIO_IOMMU_FAULT_R_MAPPING 2 |
156 | |
157 | #define VIRTIO_IOMMU_FAULT_F_READ (1 << 0) |
158 | #define VIRTIO_IOMMU_FAULT_F_WRITE (1 << 1) |
159 | #define VIRTIO_IOMMU_FAULT_F_EXEC (1 << 2) |
160 | #define VIRTIO_IOMMU_FAULT_F_ADDRESS (1 << 8) |
161 | |
162 | struct virtio_iommu_fault { |
163 | __u8 reason; |
164 | __u8 reserved[3]; |
165 | __le32 flags; |
166 | __le32 endpoint; |
167 | __u8 reserved2[4]; |
168 | __le64 address; |
169 | }; |
170 | |
171 | #endif |
172 | |