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1 | /** @file\r | |
2 | EFI IOMMU Protocol.\r | |
3 | \r | |
4 | Copyright (c) 2017, Intel Corporation. All rights reserved.<BR>\r | |
5 | SPDX-License-Identifier: BSD-2-Clause-Patent\r | |
6 | \r | |
7 | **/\r | |
8 | \r | |
9 | \r | |
10 | #ifndef __IOMMU_H__\r | |
11 | #define __IOMMU_H__\r | |
12 | \r | |
13 | //\r | |
14 | // IOMMU Protocol GUID value\r | |
15 | //\r | |
16 | #define EDKII_IOMMU_PROTOCOL_GUID \\r | |
17 | { \\r | |
18 | 0x4e939de9, 0xd948, 0x4b0f, { 0x88, 0xed, 0xe6, 0xe1, 0xce, 0x51, 0x7c, 0x1e } \\r | |
19 | }\r | |
20 | \r | |
21 | //\r | |
22 | // Forward reference for pure ANSI compatability\r | |
23 | //\r | |
24 | typedef struct _EDKII_IOMMU_PROTOCOL EDKII_IOMMU_PROTOCOL;\r | |
25 | \r | |
26 | //\r | |
27 | // Revision The revision to which the IOMMU interface adheres.\r | |
28 | // All future revisions must be backwards compatible.\r | |
29 | // If a future version is not back wards compatible it is not the same GUID.\r | |
30 | //\r | |
31 | #define EDKII_IOMMU_PROTOCOL_REVISION 0x00010000\r | |
32 | \r | |
33 | //\r | |
34 | // IOMMU Access for SetAttribute\r | |
35 | //\r | |
36 | // These types can be "ORed" together as needed.\r | |
37 | // Any undefined bits are reserved and must be zero.\r | |
38 | //\r | |
39 | #define EDKII_IOMMU_ACCESS_READ 0x1\r | |
40 | #define EDKII_IOMMU_ACCESS_WRITE 0x2\r | |
41 | \r | |
42 | //\r | |
43 | // IOMMU Operation for Map\r | |
44 | //\r | |
45 | typedef enum {\r | |
46 | ///\r | |
47 | /// A read operation from system memory by a bus master that is not capable of producing\r | |
48 | /// PCI dual address cycles.\r | |
49 | ///\r | |
50 | EdkiiIoMmuOperationBusMasterRead,\r | |
51 | ///\r | |
52 | /// A write operation from system memory by a bus master that is not capable of producing\r | |
53 | /// PCI dual address cycles.\r | |
54 | ///\r | |
55 | EdkiiIoMmuOperationBusMasterWrite,\r | |
56 | ///\r | |
57 | /// Provides both read and write access to system memory by both the processor and a bus\r | |
58 | /// master that is not capable of producing PCI dual address cycles.\r | |
59 | ///\r | |
60 | EdkiiIoMmuOperationBusMasterCommonBuffer,\r | |
61 | ///\r | |
62 | /// A read operation from system memory by a bus master that is capable of producing PCI\r | |
63 | /// dual address cycles.\r | |
64 | ///\r | |
65 | EdkiiIoMmuOperationBusMasterRead64,\r | |
66 | ///\r | |
67 | /// A write operation to system memory by a bus master that is capable of producing PCI\r | |
68 | /// dual address cycles.\r | |
69 | ///\r | |
70 | EdkiiIoMmuOperationBusMasterWrite64,\r | |
71 | ///\r | |
72 | /// Provides both read and write access to system memory by both the processor and a bus\r | |
73 | /// master that is capable of producing PCI dual address cycles.\r | |
74 | ///\r | |
75 | EdkiiIoMmuOperationBusMasterCommonBuffer64,\r | |
76 | EdkiiIoMmuOperationMaximum\r | |
77 | } EDKII_IOMMU_OPERATION;\r | |
78 | \r | |
79 | //\r | |
80 | // IOMMU attribute for AllocateBuffer\r | |
81 | // Any undefined bits are reserved and must be zero.\r | |
82 | //\r | |
83 | #define EDKII_IOMMU_ATTRIBUTE_MEMORY_WRITE_COMBINE 0x0080\r | |
84 | #define EDKII_IOMMU_ATTRIBUTE_MEMORY_CACHED 0x0800\r | |
85 | #define EDKII_IOMMU_ATTRIBUTE_DUAL_ADDRESS_CYCLE 0x8000\r | |
86 | \r | |
87 | #define EDKII_IOMMU_ATTRIBUTE_VALID_FOR_ALLOCATE_BUFFER (EDKII_IOMMU_ATTRIBUTE_MEMORY_WRITE_COMBINE | EDKII_IOMMU_ATTRIBUTE_MEMORY_CACHED | EDKII_IOMMU_ATTRIBUTE_DUAL_ADDRESS_CYCLE)\r | |
88 | \r | |
89 | #define EDKII_IOMMU_ATTRIBUTE_INVALID_FOR_ALLOCATE_BUFFER (~EDKII_IOMMU_ATTRIBUTE_VALID_FOR_ALLOCATE_BUFFER)\r | |
90 | \r | |
91 | /**\r | |
92 | Set IOMMU attribute for a system memory.\r | |
93 | \r | |
94 | If the IOMMU protocol exists, the system memory cannot be used\r | |
95 | for DMA by default.\r | |
96 | \r | |
97 | When a device requests a DMA access for a system memory,\r | |
98 | the device driver need use SetAttribute() to update the IOMMU\r | |
99 | attribute to request DMA access (read and/or write).\r | |
100 | \r | |
101 | The DeviceHandle is used to identify which device submits the request.\r | |
102 | The IOMMU implementation need translate the device path to an IOMMU device ID,\r | |
103 | and set IOMMU hardware register accordingly.\r | |
104 | 1) DeviceHandle can be a standard PCI device.\r | |
105 | The memory for BusMasterRead need set EDKII_IOMMU_ACCESS_READ.\r | |
106 | The memory for BusMasterWrite need set EDKII_IOMMU_ACCESS_WRITE.\r | |
107 | The memory for BusMasterCommonBuffer need set EDKII_IOMMU_ACCESS_READ|EDKII_IOMMU_ACCESS_WRITE.\r | |
108 | After the memory is used, the memory need set 0 to keep it being protected.\r | |
109 | 2) DeviceHandle can be an ACPI device (ISA, I2C, SPI, etc).\r | |
110 | The memory for DMA access need set EDKII_IOMMU_ACCESS_READ and/or EDKII_IOMMU_ACCESS_WRITE.\r | |
111 | \r | |
112 | @param[in] This The protocol instance pointer.\r | |
113 | @param[in] DeviceHandle The device who initiates the DMA access request.\r | |
114 | @param[in] Mapping The mapping value returned from Map().\r | |
115 | @param[in] IoMmuAccess The IOMMU access.\r | |
116 | \r | |
117 | @retval EFI_SUCCESS The IoMmuAccess is set for the memory range specified by DeviceAddress and Length.\r | |
118 | @retval EFI_INVALID_PARAMETER DeviceHandle is an invalid handle.\r | |
119 | @retval EFI_INVALID_PARAMETER Mapping is not a value that was returned by Map().\r | |
120 | @retval EFI_INVALID_PARAMETER IoMmuAccess specified an illegal combination of access.\r | |
121 | @retval EFI_UNSUPPORTED DeviceHandle is unknown by the IOMMU.\r | |
122 | @retval EFI_UNSUPPORTED The bit mask of IoMmuAccess is not supported by the IOMMU.\r | |
123 | @retval EFI_UNSUPPORTED The IOMMU does not support the memory range specified by Mapping.\r | |
124 | @retval EFI_OUT_OF_RESOURCES There are not enough resources available to modify the IOMMU access.\r | |
125 | @retval EFI_DEVICE_ERROR The IOMMU device reported an error while attempting the operation.\r | |
126 | \r | |
127 | **/\r | |
128 | typedef\r | |
129 | EFI_STATUS\r | |
130 | (EFIAPI *EDKII_IOMMU_SET_ATTRIBUTE)(\r | |
131 | IN EDKII_IOMMU_PROTOCOL *This,\r | |
132 | IN EFI_HANDLE DeviceHandle,\r | |
133 | IN VOID *Mapping,\r | |
134 | IN UINT64 IoMmuAccess\r | |
135 | );\r | |
136 | \r | |
137 | /**\r | |
138 | Provides the controller-specific addresses required to access system memory from a\r | |
139 | DMA bus master.\r | |
140 | \r | |
141 | @param This The protocol instance pointer.\r | |
142 | @param Operation Indicates if the bus master is going to read or write to system memory.\r | |
143 | @param HostAddress The system memory address to map to the PCI controller.\r | |
144 | @param NumberOfBytes On input the number of bytes to map. On output the number of bytes\r | |
145 | that were mapped.\r | |
146 | @param DeviceAddress The resulting map address for the bus master PCI controller to use to\r | |
147 | access the hosts HostAddress.\r | |
148 | @param Mapping A resulting value to pass to Unmap().\r | |
149 | \r | |
150 | @retval EFI_SUCCESS The range was mapped for the returned NumberOfBytes.\r | |
151 | @retval EFI_UNSUPPORTED The HostAddress cannot be mapped as a common buffer.\r | |
152 | @retval EFI_INVALID_PARAMETER One or more parameters are invalid.\r | |
153 | @retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack of resources.\r | |
154 | @retval EFI_DEVICE_ERROR The system hardware could not map the requested address.\r | |
155 | \r | |
156 | **/\r | |
157 | typedef\r | |
158 | EFI_STATUS\r | |
159 | (EFIAPI *EDKII_IOMMU_MAP)(\r | |
160 | IN EDKII_IOMMU_PROTOCOL *This,\r | |
161 | IN EDKII_IOMMU_OPERATION Operation,\r | |
162 | IN VOID *HostAddress,\r | |
163 | IN OUT UINTN *NumberOfBytes,\r | |
164 | OUT EFI_PHYSICAL_ADDRESS *DeviceAddress,\r | |
165 | OUT VOID **Mapping\r | |
166 | );\r | |
167 | \r | |
168 | /**\r | |
169 | Completes the Map() operation and releases any corresponding resources.\r | |
170 | \r | |
171 | @param This The protocol instance pointer.\r | |
172 | @param Mapping The mapping value returned from Map().\r | |
173 | \r | |
174 | @retval EFI_SUCCESS The range was unmapped.\r | |
175 | @retval EFI_INVALID_PARAMETER Mapping is not a value that was returned by Map().\r | |
176 | @retval EFI_DEVICE_ERROR The data was not committed to the target system memory.\r | |
177 | **/\r | |
178 | typedef\r | |
179 | EFI_STATUS\r | |
180 | (EFIAPI *EDKII_IOMMU_UNMAP)(\r | |
181 | IN EDKII_IOMMU_PROTOCOL *This,\r | |
182 | IN VOID *Mapping\r | |
183 | );\r | |
184 | \r | |
185 | /**\r | |
186 | Allocates pages that are suitable for an OperationBusMasterCommonBuffer or\r | |
187 | OperationBusMasterCommonBuffer64 mapping.\r | |
188 | \r | |
189 | @param This The protocol instance pointer.\r | |
190 | @param Type This parameter is not used and must be ignored.\r | |
191 | @param MemoryType The type of memory to allocate, EfiBootServicesData or\r | |
192 | EfiRuntimeServicesData.\r | |
193 | @param Pages The number of pages to allocate.\r | |
194 | @param HostAddress A pointer to store the base system memory address of the\r | |
195 | allocated range.\r | |
196 | @param Attributes The requested bit mask of attributes for the allocated range.\r | |
197 | \r | |
198 | @retval EFI_SUCCESS The requested memory pages were allocated.\r | |
199 | @retval EFI_UNSUPPORTED Attributes is unsupported. The only legal attribute bits are\r | |
200 | MEMORY_WRITE_COMBINE, MEMORY_CACHED and DUAL_ADDRESS_CYCLE.\r | |
201 | @retval EFI_INVALID_PARAMETER One or more parameters are invalid.\r | |
202 | @retval EFI_OUT_OF_RESOURCES The memory pages could not be allocated.\r | |
203 | \r | |
204 | **/\r | |
205 | typedef\r | |
206 | EFI_STATUS\r | |
207 | (EFIAPI *EDKII_IOMMU_ALLOCATE_BUFFER)(\r | |
208 | IN EDKII_IOMMU_PROTOCOL *This,\r | |
209 | IN EFI_ALLOCATE_TYPE Type,\r | |
210 | IN EFI_MEMORY_TYPE MemoryType,\r | |
211 | IN UINTN Pages,\r | |
212 | IN OUT VOID **HostAddress,\r | |
213 | IN UINT64 Attributes\r | |
214 | );\r | |
215 | \r | |
216 | /**\r | |
217 | Frees memory that was allocated with AllocateBuffer().\r | |
218 | \r | |
219 | @param This The protocol instance pointer.\r | |
220 | @param Pages The number of pages to free.\r | |
221 | @param HostAddress The base system memory address of the allocated range.\r | |
222 | \r | |
223 | @retval EFI_SUCCESS The requested memory pages were freed.\r | |
224 | @retval EFI_INVALID_PARAMETER The memory range specified by HostAddress and Pages\r | |
225 | was not allocated with AllocateBuffer().\r | |
226 | \r | |
227 | **/\r | |
228 | typedef\r | |
229 | EFI_STATUS\r | |
230 | (EFIAPI *EDKII_IOMMU_FREE_BUFFER)(\r | |
231 | IN EDKII_IOMMU_PROTOCOL *This,\r | |
232 | IN UINTN Pages,\r | |
233 | IN VOID *HostAddress\r | |
234 | );\r | |
235 | \r | |
236 | ///\r | |
237 | /// IOMMU Protocol structure.\r | |
238 | ///\r | |
239 | struct _EDKII_IOMMU_PROTOCOL {\r | |
240 | UINT64 Revision;\r | |
241 | EDKII_IOMMU_SET_ATTRIBUTE SetAttribute;\r | |
242 | EDKII_IOMMU_MAP Map;\r | |
243 | EDKII_IOMMU_UNMAP Unmap;\r | |
244 | EDKII_IOMMU_ALLOCATE_BUFFER AllocateBuffer;\r | |
245 | EDKII_IOMMU_FREE_BUFFER FreeBuffer;\r | |
246 | };\r | |
247 | \r | |
248 | ///\r | |
249 | /// IOMMU Protocol GUID variable.\r | |
250 | ///\r | |
251 | extern EFI_GUID gEdkiiIoMmuProtocolGuid;\r | |
252 | \r | |
253 | #endif\r |