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3db51098 | 1 | /**@file\r |
a3b8e257 | 2 | Driver Binding functions for PCI bus module.\r |
3 | \r | |
3db51098 | 4 | Copyright (c) 2006, Intel Corporation \r |
5 | All rights reserved. This program and the accompanying materials \r | |
6 | are licensed and made available under the terms and conditions of the BSD License \r | |
7 | which accompanies this distribution. The full text of the license may be found at \r | |
8 | http://opensource.org/licenses/bsd-license.php \r | |
9 | \r | |
10 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r | |
11 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. \r | |
ead42efc | 12 | \r |
3db51098 | 13 | **/\r |
ead42efc | 14 | \r |
ead42efc | 15 | \r |
03417d8d | 16 | #include "Pcibus.h"\r |
ead42efc | 17 | \r |
18 | //\r | |
19 | // PCI Bus Driver Global Variables\r | |
20 | //\r | |
21 | \r | |
22 | EFI_DRIVER_BINDING_PROTOCOL gPciBusDriverBinding = {\r | |
23 | PciBusDriverBindingSupported,\r | |
24 | PciBusDriverBindingStart,\r | |
25 | PciBusDriverBindingStop,\r | |
26 | 0xa,\r | |
27 | NULL,\r | |
28 | NULL\r | |
29 | };\r | |
30 | \r | |
ea5632e5 | 31 | EFI_INCOMPATIBLE_PCI_DEVICE_SUPPORT_PROTOCOL *gEfiIncompatiblePciDeviceSupport = NULL;\r |
ead42efc | 32 | EFI_HANDLE gPciHostBrigeHandles[PCI_MAX_HOST_BRIDGE_NUM];\r |
33 | UINTN gPciHostBridgeNumber;\r | |
34 | BOOLEAN gFullEnumeration;\r | |
35 | UINT64 gAllOne = 0xFFFFFFFFFFFFFFFFULL;\r | |
36 | UINT64 gAllZero = 0;\r | |
37 | \r | |
38 | EFI_PCI_PLATFORM_PROTOCOL *gPciPlatformProtocol;\r | |
39 | \r | |
40 | //\r | |
41 | // PCI Bus Driver Support Functions\r | |
42 | //\r | |
bcd70414 | 43 | /**\r |
ead42efc | 44 | Initialize the global variables\r |
45 | publish the driver binding protocol\r | |
46 | \r | |
a3b8e257 | 47 | @param[IN] ImageHandle,\r |
48 | @param[IN] *SystemTable\r | |
ead42efc | 49 | \r |
a3b8e257 | 50 | @retval status of installing driver binding component name protocol.\r |
ead42efc | 51 | \r |
bcd70414 | 52 | **/\r |
a3b8e257 | 53 | EFI_STATUS\r |
54 | EFIAPI\r | |
55 | PciBusEntryPoint (\r | |
56 | IN EFI_HANDLE ImageHandle,\r | |
57 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
58 | )\r | |
ead42efc | 59 | {\r |
60 | EFI_STATUS Status;\r | |
61 | \r | |
62 | InitializePciDevicePool ();\r | |
63 | \r | |
64 | gFullEnumeration = TRUE;\r | |
65 | \r | |
66 | gPciHostBridgeNumber = 0;\r | |
67 | \r | |
68 | //\r | |
69 | // Install driver model protocol(s).\r | |
70 | //\r | |
733f03aa | 71 | Status = EfiLibInstallDriverBindingComponentName2 (\r |
ead42efc | 72 | ImageHandle,\r |
73 | SystemTable,\r | |
74 | &gPciBusDriverBinding,\r | |
75 | ImageHandle,\r | |
76 | &gPciBusComponentName,\r | |
733f03aa | 77 | &gPciBusComponentName2\r |
ead42efc | 78 | );\r |
79 | ASSERT_EFI_ERROR (Status);\r | |
80 | \r | |
81 | InstallHotPlugRequestProtocol (&Status);\r | |
82 | \r | |
83 | return Status;\r | |
84 | }\r | |
85 | \r | |
bcd70414 | 86 | /**\r |
a3b8e257 | 87 | Test to see if this driver supports ControllerHandle. Any ControllerHandle\r |
88 | than contains a gEfiPciRootBridgeIoProtocolGuid protocol can be supported.\r | |
ead42efc | 89 | \r |
a3b8e257 | 90 | @param This Protocol instance pointer.\r |
91 | @param ControllerHandle Handle of device to test\r | |
92 | @param RemainingDevicePath Optional parameter use to pick a specific child\r | |
93 | device to start.\r | |
ead42efc | 94 | \r |
a3b8e257 | 95 | @retval EFI_SUCCESS This driver supports this device\r |
96 | @retval EFI_ALREADY_STARTED This driver is already running on this device\r | |
97 | @retval other This driver does not support this device\r | |
ead42efc | 98 | \r |
a3b8e257 | 99 | **/\r |
100 | EFI_STATUS\r | |
101 | EFIAPI\r | |
102 | PciBusDriverBindingSupported (\r | |
ead42efc | 103 | IN EFI_DRIVER_BINDING_PROTOCOL *This,\r |
104 | IN EFI_HANDLE Controller,\r | |
105 | IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath\r | |
a3b8e257 | 106 | )\r |
ead42efc | 107 | {\r |
108 | EFI_STATUS Status;\r | |
109 | EFI_DEVICE_PATH_PROTOCOL *ParentDevicePath;\r | |
110 | EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *PciRootBridgeIo;\r | |
111 | EFI_DEV_PATH_PTR Node;\r | |
112 | \r | |
113 | if (RemainingDevicePath != NULL) {\r | |
114 | Node.DevPath = RemainingDevicePath;\r | |
115 | if (Node.DevPath->Type != HARDWARE_DEVICE_PATH ||\r | |
116 | Node.DevPath->SubType != HW_PCI_DP ||\r | |
117 | DevicePathNodeLength(Node.DevPath) != sizeof(PCI_DEVICE_PATH)) {\r | |
118 | return EFI_UNSUPPORTED;\r | |
119 | }\r | |
120 | }\r | |
121 | //\r | |
122 | // Open the IO Abstraction(s) needed to perform the supported test\r | |
123 | //\r | |
124 | Status = gBS->OpenProtocol (\r | |
125 | Controller,\r | |
126 | &gEfiDevicePathProtocolGuid,\r | |
127 | (VOID **) &ParentDevicePath,\r | |
128 | This->DriverBindingHandle,\r | |
129 | Controller,\r | |
130 | EFI_OPEN_PROTOCOL_BY_DRIVER\r | |
131 | );\r | |
132 | if (Status == EFI_ALREADY_STARTED) {\r | |
133 | return EFI_SUCCESS;\r | |
134 | }\r | |
135 | \r | |
136 | if (EFI_ERROR (Status)) {\r | |
137 | return Status;\r | |
138 | }\r | |
139 | \r | |
140 | gBS->CloseProtocol (\r | |
141 | Controller,\r | |
142 | &gEfiDevicePathProtocolGuid,\r | |
143 | This->DriverBindingHandle,\r | |
144 | Controller\r | |
145 | );\r | |
146 | \r | |
147 | Status = gBS->OpenProtocol (\r | |
148 | Controller,\r | |
149 | &gEfiPciRootBridgeIoProtocolGuid,\r | |
150 | (VOID **) &PciRootBridgeIo,\r | |
151 | This->DriverBindingHandle,\r | |
152 | Controller,\r | |
153 | EFI_OPEN_PROTOCOL_BY_DRIVER\r | |
154 | );\r | |
155 | if (Status == EFI_ALREADY_STARTED) {\r | |
156 | return EFI_SUCCESS;\r | |
157 | }\r | |
158 | \r | |
159 | if (EFI_ERROR (Status)) {\r | |
160 | return Status;\r | |
161 | }\r | |
162 | \r | |
163 | gBS->CloseProtocol (\r | |
164 | Controller,\r | |
165 | &gEfiPciRootBridgeIoProtocolGuid,\r | |
166 | This->DriverBindingHandle,\r | |
167 | Controller\r | |
168 | );\r | |
169 | \r | |
170 | return EFI_SUCCESS;\r | |
171 | }\r | |
172 | \r | |
bcd70414 | 173 | /**\r |
a3b8e257 | 174 | Start this driver on ControllerHandle and enumerate Pci bus and start\r |
175 | all device under PCI bus.\r | |
ead42efc | 176 | \r |
a3b8e257 | 177 | @param This Protocol instance pointer.\r |
178 | @param ControllerHandle Handle of device to bind driver to\r | |
179 | @param RemainingDevicePath Optional parameter use to pick a specific child\r | |
180 | device to start.\r | |
ead42efc | 181 | \r |
a3b8e257 | 182 | @retval EFI_SUCCESS This driver is added to ControllerHandle\r |
183 | @retval EFI_ALREADY_STARTED This driver is already running on ControllerHandle\r | |
184 | @retval other This driver does not support this device\r | |
ead42efc | 185 | \r |
a3b8e257 | 186 | **/\r |
187 | EFI_STATUS\r | |
188 | EFIAPI\r | |
189 | PciBusDriverBindingStart (\r | |
ead42efc | 190 | IN EFI_DRIVER_BINDING_PROTOCOL *This,\r |
191 | IN EFI_HANDLE Controller,\r | |
192 | IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath\r | |
a3b8e257 | 193 | )\r |
ead42efc | 194 | {\r |
195 | EFI_STATUS Status;\r | |
196 | \r | |
ea5632e5 | 197 | Status = gBS->LocateProtocol (\r |
198 | &gEfiIncompatiblePciDeviceSupportProtocolGuid,\r | |
199 | NULL,\r | |
200 | (VOID **) &gEfiIncompatiblePciDeviceSupport\r | |
201 | );\r | |
202 | \r | |
ead42efc | 203 | //\r |
204 | // If PCI Platform protocol is available, get it now.\r | |
205 | // If the platform implements this, it must be installed before BDS phase\r | |
206 | //\r | |
207 | gPciPlatformProtocol = NULL;\r | |
208 | gBS->LocateProtocol (\r | |
209 | &gEfiPciPlatformProtocolGuid,\r | |
210 | NULL,\r | |
211 | (VOID **) &gPciPlatformProtocol\r | |
212 | );\r | |
213 | \r | |
214 | gFullEnumeration = (BOOLEAN) ((SearchHostBridgeHandle (Controller) ? FALSE : TRUE));\r | |
215 | \r | |
216 | //\r | |
217 | // Enumerate the entire host bridge\r | |
218 | // After enumeration, a database that records all the device information will be created\r | |
219 | //\r | |
220 | //\r | |
221 | Status = PciEnumerator (Controller);\r | |
222 | \r | |
223 | if (EFI_ERROR (Status)) {\r | |
224 | return Status;\r | |
225 | }\r | |
eb9a9a5e | 226 | \r |
ead42efc | 227 | //\r |
eb9a9a5e | 228 | // Start all the devices under the entire host bridge.\r |
ead42efc | 229 | //\r |
eb9a9a5e | 230 | StartPciDevices (Controller);\r |
ead42efc | 231 | \r |
232 | return EFI_SUCCESS;\r | |
233 | }\r | |
234 | \r | |
bcd70414 | 235 | /**\r |
a3b8e257 | 236 | Stop this driver on ControllerHandle. Support stoping any child handles\r |
237 | created by this driver.\r | |
ead42efc | 238 | \r |
a3b8e257 | 239 | @param This Protocol instance pointer.\r |
240 | @param ControllerHandle Handle of device to stop driver on\r | |
241 | @param NumberOfChildren Number of Handles in ChildHandleBuffer. If number of\r | |
242 | children is zero stop the entire bus driver.\r | |
243 | @param ChildHandleBuffer List of Child Handles to Stop.\r | |
ead42efc | 244 | \r |
a3b8e257 | 245 | @retval EFI_SUCCESS This driver is removed ControllerHandle\r |
246 | @retval other This driver was not removed from this device\r | |
ead42efc | 247 | \r |
a3b8e257 | 248 | **/\r |
249 | EFI_STATUS\r | |
250 | EFIAPI\r | |
251 | PciBusDriverBindingStop (\r | |
ead42efc | 252 | IN EFI_DRIVER_BINDING_PROTOCOL *This,\r |
253 | IN EFI_HANDLE Controller,\r | |
254 | IN UINTN NumberOfChildren,\r | |
255 | IN EFI_HANDLE *ChildHandleBuffer\r | |
a3b8e257 | 256 | )\r |
ead42efc | 257 | {\r |
258 | EFI_STATUS Status;\r | |
259 | UINTN Index;\r | |
260 | BOOLEAN AllChildrenStopped;\r | |
261 | \r | |
262 | if (NumberOfChildren == 0) {\r | |
263 | //\r | |
264 | // Close the bus driver\r | |
265 | //\r | |
266 | gBS->CloseProtocol (\r | |
267 | Controller,\r | |
268 | &gEfiDevicePathProtocolGuid,\r | |
269 | This->DriverBindingHandle,\r | |
270 | Controller\r | |
271 | );\r | |
272 | gBS->CloseProtocol (\r | |
273 | Controller,\r | |
274 | &gEfiPciRootBridgeIoProtocolGuid,\r | |
275 | This->DriverBindingHandle,\r | |
276 | Controller\r | |
277 | );\r | |
278 | \r | |
279 | DestroyRootBridgeByHandle (\r | |
280 | Controller\r | |
281 | );\r | |
282 | \r | |
283 | return EFI_SUCCESS;\r | |
284 | }\r | |
285 | \r | |
286 | //\r | |
287 | // Stop all the children\r | |
288 | //\r | |
289 | \r | |
290 | AllChildrenStopped = TRUE;\r | |
291 | \r | |
292 | for (Index = 0; Index < NumberOfChildren; Index++) {\r | |
293 | \r | |
294 | //\r | |
295 | // De register all the pci device\r | |
296 | //\r | |
297 | Status = DeRegisterPciDevice (Controller, ChildHandleBuffer[Index]);\r | |
298 | \r | |
299 | if (EFI_ERROR (Status)) {\r | |
300 | AllChildrenStopped = FALSE;\r | |
301 | }\r | |
302 | }\r | |
303 | \r | |
304 | if (!AllChildrenStopped) {\r | |
305 | return EFI_DEVICE_ERROR;\r | |
306 | }\r | |
307 | \r | |
308 | return EFI_SUCCESS;\r | |
309 | }\r | |
a3b8e257 | 310 | \r |