10590588 |
1 | /*++\r |
2 | \r |
3 | Copyright (c) 2005 - 2006, Intel Corporation \r |
4 | All rights reserved. This program and the accompanying materials \r |
5 | are licensed and made available under the terms and conditions of the BSD License \r |
6 | which accompanies this distribution. The full text of the license may be found at \r |
7 | http://opensource.org/licenses/bsd-license.php \r |
8 | \r |
9 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r |
10 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. \r |
11 | \r |
12 | Module Name:\r |
13 | \r |
14 | PciBus.c\r |
15 | \r |
16 | Abstract:\r |
17 | \r |
18 | PCI Bus Driver\r |
19 | \r |
20 | Revision 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 |
30 | EFI_STATUS\r |
31 | EFIAPI\r |
32 | PciBusEntryPoint (\r |
33 | IN EFI_HANDLE ImageHandle,\r |
34 | IN EFI_SYSTEM_TABLE *SystemTable\r |
35 | );\r |
36 | \r |
37 | EFI_STATUS\r |
38 | EFIAPI\r |
39 | PciBusDriverBindingSupported (\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 |
45 | EFI_STATUS\r |
46 | EFIAPI\r |
47 | PciBusDriverBindingStart (\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 |
53 | EFI_STATUS\r |
54 | EFIAPI\r |
55 | PciBusDriverBindingStop (\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 |
67 | EFI_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 |
76 | BOOLEAN gFullEnumeration;\r |
e56dd2ce |
77 | \r |
78 | UINT64 gAllOne = 0xFFFFFFFFFFFFFFFFULL;\r |
79 | UINT64 gAllZero = 0;\r |
10590588 |
80 | \r |
81 | //\r |
82 | // PCI Bus Driver Support Functions\r |
83 | //\r |
84 | EFI_STATUS\r |
85 | EFIAPI\r |
86 | PciBusEntryPoint (\r |
87 | IN EFI_HANDLE ImageHandle,\r |
88 | IN EFI_SYSTEM_TABLE *SystemTable\r |
89 | )\r |
90 | /*++\r |
91 | \r |
92 | Routine Description:\r |
93 | \r |
94 | Initialize the global variables\r |
95 | publish the driver binding protocol\r |
96 | \r |
97 | Arguments:\r |
98 | \r |
99 | IN EFI_HANDLE ImageHandle,\r |
100 | IN EFI_SYSTEM_TABLE *SystemTable\r |
101 | \r |
102 | Returns:\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 |
131 | EFI_STATUS\r |
132 | EFIAPI\r |
133 | PciBusDriverBindingSupported (\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 |
140 | Routine Description:\r |
141 | \r |
142 | Check to see if pci bus driver supports the given controller\r |
143 | \r |
144 | Arguments:\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 |
150 | Returns:\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 |
221 | EFI_STATUS\r |
222 | EFIAPI\r |
223 | PciBusDriverBindingStart (\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 |
230 | Routine Description:\r |
231 | \r |
232 | Start to management the controller passed in\r |
233 | \r |
234 | Arguments:\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 |
240 | Returns:\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 |
268 | EFI_STATUS\r |
269 | EFIAPI\r |
270 | PciBusDriverBindingStop (\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 |
278 | Routine 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 |
283 | Arguments:\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 |
290 | Returns:\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 |