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