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10590588 1/*++\r
2\r
b1f700a8
HT		 3Copyright (c) 2005 - 2006, Intel Corporation. All rights reserved.<BR>\r
4This program and the accompanying materials \r
10590588 5are licensed and made available under the terms and conditions of the BSD License \r
6which accompanies this distribution. The full text of the license may be found at \r
7http://opensource.org/licenses/bsd-license.php \r
8 \r
9THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r
10WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. \r
11\r
12Module Name:\r
13\r
14 PciBus.c\r
15 \r
16Abstract:\r
17\r
18 PCI Bus Driver\r
19\r
20Revision History\r
21 \r
22--*/\r
23\r
24#include "PciBus.h"\r
25\r
26//\r
27// PCI Bus Support Function Prototypes\r
28//\r
29\r
30EFI_STATUS\r
31EFIAPI\r
32PciBusEntryPoint (\r
33 IN EFI_HANDLE ImageHandle,\r
34 IN EFI_SYSTEM_TABLE *SystemTable\r
35 );\r
36\r
37EFI_STATUS\r
38EFIAPI\r
39PciBusDriverBindingSupported (\r
40 IN EFI_DRIVER_BINDING_PROTOCOL *This,\r
41 IN EFI_HANDLE Controller,\r
42 IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath\r
43 );\r
44\r
45EFI_STATUS\r
46EFIAPI\r
47PciBusDriverBindingStart (\r
48 IN EFI_DRIVER_BINDING_PROTOCOL *This,\r
49 IN EFI_HANDLE Controller,\r
50 IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath\r
51 );\r
52\r
53EFI_STATUS\r
54EFIAPI\r
55PciBusDriverBindingStop (\r
56 IN EFI_DRIVER_BINDING_PROTOCOL *This,\r
57 IN EFI_HANDLE Controller,\r
58 IN UINTN NumberOfChildren,\r
59 IN EFI_HANDLE *ChildHandleBuffer\r
60 );\r
61\r
62\r
63//\r
64// PCI Bus Driver Global Variables\r
65//\r
66\r
67EFI_DRIVER_BINDING_PROTOCOL gPciBusDriverBinding = {\r
68 PciBusDriverBindingSupported,\r
69 PciBusDriverBindingStart,\r
70 PciBusDriverBindingStop,\r
71 0xa,\r
72 NULL,\r
73 NULL\r
74};\r
75\r
76BOOLEAN gFullEnumeration;\r
e56dd2ce 77\r
78UINT64 gAllOne = 0xFFFFFFFFFFFFFFFFULL;\r
79UINT64 gAllZero = 0;\r
10590588 80 \r
81//\r
82// PCI Bus Driver Support Functions\r
83//\r
84EFI_STATUS\r
85EFIAPI\r
86PciBusEntryPoint (\r
87 IN EFI_HANDLE ImageHandle,\r
88 IN EFI_SYSTEM_TABLE *SystemTable\r
89 )\r
90/*++\r
91\r
92Routine Description:\r
93\r
94 Initialize the global variables\r
95 publish the driver binding protocol\r
96\r
97Arguments:\r
98\r
99 IN EFI_HANDLE ImageHandle,\r
100 IN EFI_SYSTEM_TABLE *SystemTable\r
101\r
102Returns:\r
103\r
104 EFI_SUCCESS \r
105 EFI_DEVICE_ERROR \r
106\r
107--*/\r
108{\r
109 EFI_STATUS Status;\r
110\r
111 //\r
112 // Initialize the EFI Driver Library\r
113 //\r
114 Status = EfiLibInstallDriverBindingComponentName2 (\r
115 ImageHandle,\r
116 SystemTable,\r
117 &gPciBusDriverBinding,\r
118 ImageHandle,\r
119 &gPciBusComponentName,\r
120 &gPciBusComponentName2\r
121 );\r
122 ASSERT_EFI_ERROR (Status);\r
123 \r
124 InitializePciDevicePool ();\r
125\r
126 gFullEnumeration = TRUE;\r
127 \r
128 return Status;\r
129}\r
130\r
131EFI_STATUS\r
132EFIAPI\r
133PciBusDriverBindingSupported (\r
134 IN EFI_DRIVER_BINDING_PROTOCOL *This,\r
135 IN EFI_HANDLE Controller,\r
136 IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath\r
137 )\r
138/*++\r
139\r
140Routine Description:\r
141\r
142 Check to see if pci bus driver supports the given controller\r
143\r
144Arguments:\r
145 \r
146 IN EFI_DRIVER_BINDING_PROTOCOL *This,\r
147 IN EFI_HANDLE Controller,\r
148 IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath\r
149\r
150Returns:\r
151\r
152 EFI_SUCCESS\r
153\r
154--*/\r
155{\r
156 EFI_STATUS Status;\r
157 EFI_DEVICE_PATH_PROTOCOL *ParentDevicePath;\r
158 EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *PciRootBridgeIo;\r
159 EFI_DEV_PATH_PTR Node;\r
160\r
161 if (RemainingDevicePath != NULL) {\r
162 Node.DevPath = RemainingDevicePath;\r
163 if (Node.DevPath->Type != HARDWARE_DEVICE_PATH ||\r
164 Node.DevPath->SubType != HW_PCI_DP ||\r
165 DevicePathNodeLength(Node.DevPath) != sizeof(PCI_DEVICE_PATH)) {\r
166 return EFI_UNSUPPORTED;\r
167 }\r
168 }\r
169 //\r
170 // Open the IO Abstraction(s) needed to perform the supported test\r
171 //\r
172 Status = gBS->OpenProtocol (\r
173 Controller,\r
174 &gEfiDevicePathProtocolGuid,\r
175 (VOID **) &ParentDevicePath,\r
176 This->DriverBindingHandle,\r
177 Controller,\r
178 EFI_OPEN_PROTOCOL_BY_DRIVER\r
179 );\r
180 if (Status == EFI_ALREADY_STARTED) {\r
181 return EFI_SUCCESS;\r
182 }\r
183\r
184 if (EFI_ERROR (Status)) {\r
185 return Status;\r
186 }\r
187\r
188 gBS->CloseProtocol (\r
189 Controller,\r
190 &gEfiDevicePathProtocolGuid,\r
191 This->DriverBindingHandle,\r
192 Controller\r
193 );\r
194\r
195 Status = gBS->OpenProtocol (\r
196 Controller,\r
197 &gEfiPciRootBridgeIoProtocolGuid,\r
198 (VOID **) &PciRootBridgeIo,\r
199 This->DriverBindingHandle,\r
200 Controller,\r
201 EFI_OPEN_PROTOCOL_BY_DRIVER\r
202 );\r
203 if (Status == EFI_ALREADY_STARTED) {\r
204 return EFI_SUCCESS;\r
205 }\r
206\r
207 if (EFI_ERROR (Status)) {\r
208 return Status;\r
209 }\r
210\r
211 gBS->CloseProtocol (\r
212 Controller,\r
213 &gEfiPciRootBridgeIoProtocolGuid,\r
214 This->DriverBindingHandle,\r
215 Controller\r
216 );\r
217\r
218 return EFI_SUCCESS;\r
219}\r
220\r
221EFI_STATUS\r
222EFIAPI\r
223PciBusDriverBindingStart (\r
224 IN EFI_DRIVER_BINDING_PROTOCOL *This,\r
225 IN EFI_HANDLE Controller,\r
226 IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath\r
227 )\r
228/*++\r
229\r
230Routine Description:\r
231\r
232 Start to management the controller passed in\r
233\r
234Arguments:\r
235 \r
236 IN EFI_DRIVER_BINDING_PROTOCOL *This,\r
237 IN EFI_HANDLE Controller,\r
238 IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath\r
239\r
240Returns:\r
241 \r
242\r
243--*/\r
244{\r
245 EFI_STATUS Status;\r
246\r
247 //\r
248 // Enumerate the entire host bridge\r
249 // After enumeration, a database that records all the device information will be created\r
250 //\r
251 //\r
252 Status = PciEnumerator (Controller);\r
253\r
254 if (EFI_ERROR (Status)) {\r
255 return Status;\r
256 }\r
257 \r
258 //\r
259 // Enable PCI device specified by remaining device path. BDS or other driver can call the\r
260 // start more than once.\r
261 //\r
262 \r
263 StartPciDevices (Controller, RemainingDevicePath);\r
264\r
265 return EFI_SUCCESS;\r
266}\r
267\r
268EFI_STATUS\r
269EFIAPI\r
270PciBusDriverBindingStop (\r
271 IN EFI_DRIVER_BINDING_PROTOCOL *This,\r
272 IN EFI_HANDLE Controller,\r
273 IN UINTN NumberOfChildren,\r
274 IN EFI_HANDLE *ChildHandleBuffer\r
275 )\r
276/*++\r
277\r
278Routine Description:\r
279\r
280 Stop one or more children created at start of pci bus driver\r
281 if all the the children get closed, close the protocol\r
282\r
283Arguments:\r
284 \r
285 IN EFI_DRIVER_BINDING_PROTOCOL *This,\r
286 IN EFI_HANDLE Controller,\r
287 IN UINTN NumberOfChildren,\r
288 IN EFI_HANDLE *ChildHandleBuffer\r
289\r
290Returns:\r
291\r
292 \r
293--*/\r
294{\r
295 EFI_STATUS Status;\r
296 UINTN Index;\r
297 BOOLEAN AllChildrenStopped;\r
298\r
299 if (NumberOfChildren == 0) {\r
300 //\r
301 // Close the bus driver\r
302 //\r
303 gBS->CloseProtocol (\r
304 Controller,\r
305 &gEfiDevicePathProtocolGuid,\r
306 This->DriverBindingHandle,\r
307 Controller\r
308 );\r
309 gBS->CloseProtocol (\r
310 Controller,\r
311 &gEfiPciRootBridgeIoProtocolGuid,\r
312 This->DriverBindingHandle,\r
313 Controller\r
314 );\r
315\r
316 DestroyRootBridgeByHandle (\r
317 Controller\r
318 );\r
319\r
320 return EFI_SUCCESS;\r
321 }\r
322\r
323 //\r
324 // Stop all the children\r
325 //\r
326\r
327 AllChildrenStopped = TRUE;\r
328\r
329 for (Index = 0; Index < NumberOfChildren; Index++) {\r
330\r
331 //\r
332 // De register all the pci device\r
333 //\r
334 Status = DeRegisterPciDevice (Controller, ChildHandleBuffer[Index]);\r
335\r
336 if (EFI_ERROR (Status)) {\r
337 AllChildrenStopped = FALSE;\r
338 }\r
339 }\r
340\r
341 if (!AllChildrenStopped) {\r
342 return EFI_DEVICE_ERROR;\r
343 }\r
344\r
345 return EFI_SUCCESS;\r
346}\r
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