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79964ac8 | 1 | /** @file\r |
9ca1b12e | 2 | This file declares EFI PCI Hot Plug Init Protocol.\r |
8411f1c0 | 3 | This protocol provides the necessary functionality to initialize the Hot Plug Controllers (HPCs) and\r |
4 | the buses that they control. This protocol also provides information regarding resource padding.\r | |
79964ac8 | 5 | \r |
2bbaeb0d | 6 | Copyright (c) 2007 - 2009, Intel Corporation\r |
79964ac8 | 7 | All rights reserved. This program and the accompanying materials\r |
8 | are licensed and made available under the terms and conditions of the BSD License\r | |
9 | which accompanies this distribution. The full text of the license may be found at\r | |
10 | http://opensource.org/licenses/bsd-license.php\r | |
11 | \r | |
12 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
13 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
14 | \r | |
79964ac8 | 15 | @par Revision Reference:\r |
16 | This protocol is defined in Framework of EFI Hot Plug Pci Initialization Protocol Spec\r | |
17 | Version 0.9\r | |
18 | \r | |
19 | **/\r | |
20 | \r | |
21 | #ifndef _EFI_PCI_HOT_PLUG_INIT_H_\r | |
22 | #define _EFI_PCI_HOT_PLUG_INIT_H_\r | |
23 | \r | |
b80fbe85 | 24 | #include <PiDxe.h>\r |
25 | \r | |
9ca1b12e | 26 | ///\r |
27 | /// Global ID for the PCI Hot Plug Protocol\r | |
28 | ///\r | |
79964ac8 | 29 | #define EFI_PCI_HOT_PLUG_INIT_PROTOCOL_GUID \\r |
8ba07297 | 30 | { \\r |
31 | 0xaa0e8bc1, 0xdabc, 0x46b0, {0xa8, 0x44, 0x37, 0xb8, 0x16, 0x9b, 0x2b, 0xea } \\r | |
32 | }\r | |
79964ac8 | 33 | \r |
34 | typedef struct _EFI_PCI_HOT_PLUG_INIT_PROTOCOL EFI_PCI_HOT_PLUG_INIT_PROTOCOL;\r | |
35 | \r | |
9ca1b12e | 36 | ///\r |
37 | /// Current state of an HPC\r | |
38 | ///\r | |
79964ac8 | 39 | typedef UINT16 EFI_HPC_STATE;\r |
40 | \r | |
9ca1b12e | 41 | ///\r |
42 | /// The HPC initialization function was called and the HPC completed \r | |
43 | /// initialization, but it was not enabled for some reason. The HPC may be \r | |
44 | /// disabled in hardware, or it may be disabled due to user preferences, \r | |
45 | /// hardware failure, or other reasons. No resource padding is required.\r | |
46 | ///\r | |
47 | #define EFI_HPC_STATE_INITIALIZED 0x01\r | |
79964ac8 | 48 | \r |
9ca1b12e | 49 | ///\r |
50 | /// The HPC initialization function was called, the HPC completed \r | |
51 | /// initialization, and it was enabled. Resource padding is required.\r | |
52 | ///\r | |
53 | #define EFI_HPC_STATE_ENABLED 0x02\r | |
54 | \r | |
55 | ///\r | |
56 | /// Location definition for PCI Hot Plug Controller\r | |
57 | ///\r | |
79964ac8 | 58 | typedef struct{\r |
9ca1b12e | 59 | ///\r |
60 | /// The device path to the Root HPC\r | |
61 | ///\r | |
79964ac8 | 62 | EFI_DEVICE_PATH_PROTOCOL *HpcDevicePath;\r |
9ca1b12e | 63 | ///\r |
64 | /// The device path to the Hot Plug Bus (HPB) that is controlled by \r | |
65 | /// the root HPC.\r | |
66 | ///\r | |
79964ac8 | 67 | EFI_DEVICE_PATH_PROTOCOL *HpbDevicePath;\r |
68 | } EFI_HPC_LOCATION;\r | |
69 | \r | |
70 | \r | |
8ba07297 | 71 | ///\r |
72 | /// Describes how resource padding should be applied\r | |
73 | ///\r | |
79964ac8 | 74 | typedef enum{\r |
75 | EfiPaddingPciBus,\r | |
76 | EfiPaddingPciRootBridge\r | |
77 | } EFI_HPC_PADDING_ATTRIBUTES;\r | |
78 | \r | |
79 | /**\r | |
80 | Returns a list of root Hot Plug Controllers (HPCs) that require initialization\r | |
81 | during the boot process.\r | |
82 | \r | |
8ba07297 | 83 | This procedure returns a list of root HPCs. The PCI bus driver must initialize these controllers \r |
84 | during the boot process. The PCI bus driver may or may not be able to detect these HPCs. If the \r | |
85 | platform includes a PCI-to-CardBus bridge, it can be included in this list if it requires initialization. \r | |
86 | The HpcList must be self consistent. An HPC cannot control any of its parent buses. Only one HPC \r | |
87 | can control a PCI bus. Because this list includes only root HPCs, no HPC in the list can be a child of \r | |
88 | another HPC. This policy must be enforced by the EFI_PCI_HOT_PLUG_INIT_PROTOCOL. \r | |
89 | The PCI bus driver may not check for such invalid conditions. \r | |
90 | The callee allocates the buffer HpcList\r | |
91 | \r | |
79964ac8 | 92 | @param This Pointer to the EFI_PCI_HOT_PLUG_INIT_PROTOCOL instance.\r |
93 | @param HpcCount The number of root HPCs that were returned.\r | |
94 | @param HpcList The list of root HPCs. HpcCount defines the number of\r | |
95 | elements in this list.\r | |
96 | \r | |
97 | @retval EFI_SUCCESS HpcList was returned.\r | |
98 | @retval EFI_OUT_OF_RESOURCES HpcList was not returned due to insufficient resources.\r | |
99 | @retval EFI_INVALID_PARAMETER HpcCount is NULL or HpcList is NULL.\r | |
100 | \r | |
101 | **/\r | |
102 | typedef\r | |
103 | EFI_STATUS\r | |
69686d56 | 104 | (EFIAPI *EFI_GET_ROOT_HPC_LIST)(\r |
516e9f28 | 105 | IN EFI_PCI_HOT_PLUG_INIT_PROTOCOL *This,\r |
79964ac8 | 106 | OUT UINTN *HpcCount,\r |
107 | OUT EFI_HPC_LOCATION **HpcList\r | |
108 | );\r | |
109 | \r | |
110 | /**\r | |
111 | Initializes one root Hot Plug Controller (HPC). This process may causes\r | |
112 | initialization of its subordinate buses.\r | |
8ba07297 | 113 | \r |
114 | This function initializes the specified HPC. At the end of initialization, the hot-plug slots or sockets \r | |
115 | (controlled by this HPC) are powered and are connected to the bus. All the necessary registers in the \r | |
116 | HPC are set up. For a Standard (PCI) Hot Plug Controller (SHPC), the registers that must be set up \r | |
117 | are defined in the PCI Standard Hot Plug Controller and Subsystem Specification.\r | |
79964ac8 | 118 | \r |
119 | @param This Pointer to the EFI_PCI_HOT_PLUG_INIT_PROTOCOL instance.\r | |
120 | @param HpcDevicePath The device path to the HPC that is being initialized.\r | |
121 | @param HpcPciAddress The address of the HPC function on the PCI bus.\r | |
122 | @param Event The event that should be signaled when the HPC initialization\r | |
123 | is complete.\r | |
8ba07297 | 124 | @param HpcState The state of the HPC hardware. The state is EFI_HPC_STATE_INITIALIZED\r |
125 | or EFI_HPC_STATE_ENABLED.\r | |
79964ac8 | 126 | \r |
127 | @retval EFI_SUCCESS If Event is NULL, the specific HPC was successfully\r | |
128 | initialized. If Event is not NULL, Event will be signaled at a later time\r | |
129 | when initialization is complete.\r | |
130 | @retval EFI_UNSUPPORTED This instance of EFI_PCI_HOT_PLUG_INIT_PROTOCOL\r | |
131 | does not support the specified HPC.\r | |
132 | @retval EFI_OUT_OF_RESOURCES Initialization failed due to insufficient\r | |
133 | resources.\r | |
134 | @retval EFI_INVALID_PARAMETER HpcState is NULL.\r | |
135 | \r | |
136 | **/\r | |
137 | typedef\r | |
138 | EFI_STATUS\r | |
69686d56 | 139 | (EFIAPI *EFI_INITIALIZE_ROOT_HPC)(\r |
516e9f28 | 140 | IN EFI_PCI_HOT_PLUG_INIT_PROTOCOL *This,\r |
79964ac8 | 141 | IN EFI_DEVICE_PATH_PROTOCOL *HpcDevicePath,\r |
142 | IN UINT64 HpcPciAddress,\r | |
143 | IN EFI_EVENT Event, OPTIONAL\r | |
144 | OUT EFI_HPC_STATE *HpcState\r | |
145 | );\r | |
146 | \r | |
147 | /**\r | |
148 | Returns the resource padding that is required by the PCI bus that is controlled\r | |
149 | by the specified Hot Plug Controller (HPC).\r | |
150 | \r | |
8ba07297 | 151 | This function returns the resource padding that is required by the PCI bus that is controlled by the \r |
152 | specified HPC. This member function is called for all the root HPCs and nonroot HPCs that are \r | |
153 | detected by the PCI bus enumerator. This function will be called before PCI resource allocation is \r | |
154 | completed. This function must be called after all the root HPCs, with the possible exception of a \r | |
155 | PCI-to-CardBus bridge, have completed initialization.\r | |
156 | \r | |
79964ac8 | 157 | @param This Pointer to the EFI_PCI_HOT_PLUG_INIT_PROTOCOL instance.\r |
158 | @param HpcDevicePath The device path to the HPC.\r | |
159 | @param HpcPciAddress The address of the HPC function on the PCI bus.\r | |
160 | @param HpcState The state of the HPC hardware.\r | |
161 | @param Padding The amount of resource padding that is required by the\r | |
162 | PCI bus under the control of the specified HPC.\r | |
163 | @param Attributes Describes how padding is accounted for. The padding\r | |
164 | is returned in the form of ACPI 2.0 resource descriptors.\r | |
165 | \r | |
166 | @retval EFI_SUCCESS The resource padding was successfully returned.\r | |
167 | @retval EFI_UNSUPPORTED This instance of the EFI_PCI_HOT_PLUG_INIT_PROTOCOL\r | |
168 | does not support the specified HPC.\r | |
169 | @retval EFI_NOT_READY This function was called before HPC initialization is complete.\r | |
170 | @retval EFI_INVALID_PARAMETER HpcState or Padding or Attributes is NULL.\r | |
171 | @retval EFI_OUT_OF_RESOURCES ACPI 2.0 resource descriptors for Padding\r | |
172 | cannot be allocated due to insufficient resources.\r | |
173 | \r | |
174 | **/\r | |
175 | typedef\r | |
176 | EFI_STATUS\r | |
8ba07297 | 177 | (EFIAPI *EFI_GET_HOT_PLUG_PADDING)(\r |
516e9f28 | 178 | IN EFI_PCI_HOT_PLUG_INIT_PROTOCOL *This,\r |
79964ac8 | 179 | IN EFI_DEVICE_PATH_PROTOCOL *HpcDevicePath,\r |
180 | IN UINT64 HpcPciAddress,\r | |
181 | OUT EFI_HPC_STATE *HpcState,\r | |
182 | OUT VOID **Padding,\r | |
183 | OUT EFI_HPC_PADDING_ATTRIBUTES *Attributes\r | |
184 | );\r | |
185 | \r | |
186 | \r | |
187 | //\r | |
188 | // Prototypes for the PCI Hot Plug Init Protocol\r | |
189 | //\r | |
190 | \r | |
9ca1b12e | 191 | ///\r |
192 | /// This protocol provides the necessary functionality to initialize the\r | |
193 | /// Hot Plug Controllers (HPCs) and the buses that they control. This protocol\r | |
194 | /// also provides information regarding resource padding.\r | |
195 | ///\r | |
79964ac8 | 196 | struct _EFI_PCI_HOT_PLUG_INIT_PROTOCOL {\r |
2bbaeb0d | 197 | ///\r |
198 | /// Returns a list of root HPCs and the buses that they control.\r | |
199 | ///\r | |
79964ac8 | 200 | EFI_GET_ROOT_HPC_LIST GetRootHpcList;\r |
2bbaeb0d | 201 | \r |
202 | ///\r | |
203 | /// Initializes the specified root HPC.\r | |
204 | ///\r | |
79964ac8 | 205 | EFI_INITIALIZE_ROOT_HPC InitializeRootHpc;\r |
2bbaeb0d | 206 | \r |
207 | ///\r | |
208 | /// Returns the resource padding that is required by the HPC.\r | |
209 | ///\r | |
8ba07297 | 210 | EFI_GET_HOT_PLUG_PADDING GetResourcePadding;\r |
79964ac8 | 211 | };\r |
212 | \r | |
213 | extern EFI_GUID gEfiPciHotPlugInitProtocolGuid;\r | |
214 | \r | |
215 | #endif\r |