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8a67d61d 1/** @file\r
2\r
3Copyright (c) 2005 - 2007, Intel Corporation\r
4All rights reserved. This program and the accompanying materials\r
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 MnpMain.c\r
15\r
16Abstract:\r
17\r
18 Implementation of Managed Network Protocol public services.\r
19\r
20\r
21**/\r
22\r
23#include <Library/BaseMemoryLib.h>\r
24#include <Library/BaseLib.h>\r
25\r
26#include "MnpImpl.h"\r
27\r
28\r
29/**\r
30 Get configuration data of this instance.\r
31\r
32 @param This Pointer to the Managed Network Protocol.\r
33 @param MnpConfigData Pointer to strorage for MNP operational\r
34 parameters.\r
35 @param SnpModeData Pointer to strorage for SNP operational\r
36 parameters.\r
37\r
38 @retval EFI_SUCCESS The operation completed successfully.\r
39 @retval EFI_INVALID_PARAMETER This is NULL.\r
40 @retval EFI_NOT_STARTED This MNP child driver instance has not been\r
41 configured The default values are returned in\r
42 MnpConfigData if it is not NULL.\r
43\r
44**/\r
45EFI_STATUS\r
46EFIAPI\r
47MnpGetModeData (\r
48 IN EFI_MANAGED_NETWORK_PROTOCOL *This,\r
49 OUT EFI_MANAGED_NETWORK_CONFIG_DATA *MnpConfigData OPTIONAL,\r
50 OUT EFI_SIMPLE_NETWORK_MODE *SnpModeData OPTIONAL\r
51 )\r
52{\r
53 MNP_INSTANCE_DATA *Instance;\r
54 EFI_SIMPLE_NETWORK_PROTOCOL *Snp;\r
55 EFI_TPL OldTpl;\r
56 EFI_STATUS Status;\r
57\r
58 if (This == NULL) {\r
59\r
60 return EFI_INVALID_PARAMETER;\r
61 }\r
62\r
63 Instance = MNP_INSTANCE_DATA_FROM_THIS (This);\r
64\r
e48e37fc 65 OldTpl = gBS->RaiseTPL (TPL_CALLBACK);\r
8a67d61d 66\r
67 if (MnpConfigData != NULL) {\r
68 //\r
69 // Copy the instance configuration data.\r
70 //\r
687a2e5f 71 CopyMem (MnpConfigData, &Instance->ConfigData, sizeof (*MnpConfigData));\r
8a67d61d 72 }\r
73\r
74 if (SnpModeData != NULL) {\r
75 //\r
76 // Copy the underlayer Snp mode data.\r
77 //\r
78 Snp = Instance->MnpServiceData->Snp;\r
687a2e5f 79 CopyMem (SnpModeData, Snp->Mode, sizeof (*SnpModeData));\r
8a67d61d 80 }\r
81\r
82 if (!Instance->Configured) {\r
83 Status = EFI_NOT_STARTED;\r
84 } else {\r
85 Status = EFI_SUCCESS;\r
86 }\r
87\r
e48e37fc 88 gBS->RestoreTPL (OldTpl);\r
8a67d61d 89\r
90 return Status;\r
91}\r
92\r
93\r
94/**\r
95 Set or clear the operational parameters for the MNP child driver.\r
96\r
97 @param This Pointer to the Managed Network Protocol.\r
98 @param MnpConfigData Pointer to the configuration data that will be\r
99 assigned to the MNP child driver instance. If\r
100 NULL, the MNP child driver instance is reset to\r
101 startup defaults and all pending transmit and\r
102 receive requests are flushed.\r
103\r
104 @retval EFI_SUCCESS The operation completed successfully.\r
105 @retval EFI_INVALID_PARAMETER One or more parameter is invalid.\r
106 @retval EFI_OUT_OF_RESOURCES Required system resources (usually memory) could\r
107 not be allocated.\r
108 @retval EFI_UNSUPPORTED EnableReceiveTimestamps is TRUE, this\r
109 implementation doesn't support it.\r
110 @retval EFI_DEVICE_ERROR An unexpected network or system error occurred.\r
111 @retval Other The MNP child driver instance has been reset to\r
112 startup defaults.\r
113\r
114**/\r
115EFI_STATUS\r
116EFIAPI\r
117MnpConfigure (\r
118 IN EFI_MANAGED_NETWORK_PROTOCOL *This,\r
119 IN EFI_MANAGED_NETWORK_CONFIG_DATA *MnpConfigData OPTIONAL\r
120 )\r
121{\r
122 MNP_INSTANCE_DATA *Instance;\r
123 EFI_TPL OldTpl;\r
124 EFI_STATUS Status;\r
125\r
126 if ((This == NULL) ||\r
127 ((MnpConfigData != NULL) &&\r
128 (MnpConfigData->ProtocolTypeFilter > 0) &&\r
129 (MnpConfigData->ProtocolTypeFilter <= 1500))) {\r
130\r
131 return EFI_INVALID_PARAMETER;\r
132 }\r
133\r
134 Instance = MNP_INSTANCE_DATA_FROM_THIS (This);\r
135\r
e48e37fc 136 OldTpl = gBS->RaiseTPL (TPL_CALLBACK);\r
8a67d61d 137\r
138 if ((MnpConfigData == NULL) && (!Instance->Configured)) {\r
139 //\r
140 // If the instance is not configured and a reset is requested, just return.\r
141 //\r
142 Status = EFI_SUCCESS;\r
143 goto ON_EXIT;\r
144 }\r
145\r
146 //\r
147 // Configure the instance.\r
148 //\r
149 Status = MnpConfigureInstance (Instance, MnpConfigData);\r
150\r
151ON_EXIT:\r
e48e37fc 152 gBS->RestoreTPL (OldTpl);\r
8a67d61d 153\r
154 return Status;\r
155}\r
156\r
157\r
158/**\r
159 Translate a multicast IP address to a multicast hardware (MAC) address.\r
160\r
161 @param This Pointer to the Managed Network Protocol.\r
162 @param Ipv6Flag Set to TRUE if IpAddress is an IPv6 multicast\r
163 address. Set to FALSE if IpAddress is an IPv4\r
164 multicast address.\r
165 @param IpAddress Pointer to the multicast IP address to convert.\r
166 @param MacAddress Pointer to the resulting multicast MAC address.\r
167\r
168 @retval EFI_SUCCESS The operation completed successfully.\r
169 @retval EFI_INVALID_PARAMETER One or more parameter is invalid.\r
170 @retval EFI_NOT_STARTED This MNP child driver instance has not been\r
171 configured.\r
172 @retval EFI_UNSUPPORTED Ipv6Flag is TRUE, this implementation doesn't\r
173 supported it.\r
174 @retval EFI_DEVICE_ERROR An unexpected network or system error occurred.\r
175 @retval Other The address could not be converted.\r
176\r
177**/\r
178EFI_STATUS\r
179EFIAPI\r
180MnpMcastIpToMac (\r
181 IN EFI_MANAGED_NETWORK_PROTOCOL *This,\r
182 IN BOOLEAN Ipv6Flag,\r
183 IN EFI_IP_ADDRESS *IpAddress,\r
184 OUT EFI_MAC_ADDRESS *MacAddress\r
185 )\r
186{\r
187 EFI_STATUS Status;\r
188 MNP_INSTANCE_DATA *Instance;\r
189 EFI_SIMPLE_NETWORK_PROTOCOL *Snp;\r
190 EFI_TPL OldTpl;\r
191\r
192 if ((This == NULL) || (IpAddress == NULL) || (MacAddress == NULL)) {\r
193\r
194 return EFI_INVALID_PARAMETER;\r
195 }\r
196\r
197 if (Ipv6Flag) {\r
198 //\r
199 // Currently IPv6 isn't supported.\r
200 //\r
201 return EFI_UNSUPPORTED;\r
202 }\r
203\r
204 if (!IP4_IS_MULTICAST (EFI_NTOHL (*IpAddress))) {\r
205 //\r
206 // The IPv4 address passed in is not a multicast address.\r
207 //\r
208 return EFI_INVALID_PARAMETER;\r
209 }\r
210\r
211 Instance = MNP_INSTANCE_DATA_FROM_THIS (This);\r
212\r
e48e37fc 213 OldTpl = gBS->RaiseTPL (TPL_CALLBACK);\r
8a67d61d 214\r
215 if (!Instance->Configured) {\r
216\r
217 Status = EFI_NOT_STARTED;\r
218 goto ON_EXIT;\r
219 }\r
220\r
221 Snp = Instance->MnpServiceData->Snp;\r
222 ASSERT (Snp != NULL);\r
223\r
224 if (Snp->Mode->IfType == NET_IFTYPE_ETHERNET) {\r
225 //\r
226 // Translate the IPv4 address into a multicast MAC address if the NIC is an\r
227 // ethernet NIC.\r
228 //\r
229 MacAddress->Addr[0] = 0x01;\r
230 MacAddress->Addr[1] = 0x00;\r
231 MacAddress->Addr[2] = 0x5E;\r
4eb65aff 232 MacAddress->Addr[3] = (UINT8) (IpAddress->v4.Addr[1] & 0x7F);\r
8a67d61d 233 MacAddress->Addr[4] = IpAddress->v4.Addr[2];\r
234 MacAddress->Addr[5] = IpAddress->v4.Addr[3];\r
235\r
236 Status = EFI_SUCCESS;\r
237 } else {\r
238 //\r
239 // Invoke Snp to translate the multicast IP address.\r
240 //\r
241 Status = Snp->MCastIpToMac (\r
242 Snp,\r
243 Ipv6Flag,\r
244 IpAddress,\r
245 MacAddress\r
246 );\r
247 }\r
248\r
249ON_EXIT:\r
e48e37fc 250 gBS->RestoreTPL (OldTpl);\r
8a67d61d 251\r
252 return Status;\r
253}\r
254\r
255\r
256/**\r
257 Enable or disable receie filters for multicast address.\r
258\r
259 @param This Pointer to the Managed Network Protocol.\r
260 @param JoinFlag Set to TRUE to join this multicast group. Set to\r
261 FALSE to leave this multicast group.\r
262 @param MacAddress Pointer to the multicast MAC group (address) to\r
263 join or leave.\r
264\r
265 @retval EFI_SUCCESS The operation completed successfully.\r
266 @retval EFI_INVALID_PARAMETER One or more parameter is invalid\r
267 @retval EFI_NOT_STARTED This MNP child driver instance has not been\r
268 configured.\r
269 @retval EFI_ALREADY_STARTED The supplied multicast group is already joined.\r
270 @retval EFI_NOT_FOUND The supplied multicast group is not joined.\r
271 @retval EFI_DEVICE_ERROR An unexpected network or system error occurred.\r
272 @retval Other The requested operation could not be completed.\r
273 The MNP multicast group settings are unchanged.\r
274\r
275**/\r
276EFI_STATUS\r
277EFIAPI\r
278MnpGroups (\r
279 IN EFI_MANAGED_NETWORK_PROTOCOL *This,\r
280 IN BOOLEAN JoinFlag,\r
281 IN EFI_MAC_ADDRESS *MacAddress OPTIONAL\r
282 )\r
283{\r
284 MNP_INSTANCE_DATA *Instance;\r
285 EFI_SIMPLE_NETWORK_MODE *SnpMode;\r
286 MNP_GROUP_CONTROL_BLOCK *GroupCtrlBlk;\r
287 MNP_GROUP_ADDRESS *GroupAddress;\r
e48e37fc 288 LIST_ENTRY *ListEntry;\r
8a67d61d 289 BOOLEAN AddressExist;\r
290 EFI_TPL OldTpl;\r
291 EFI_STATUS Status;\r
292\r
293 if (This == NULL || (JoinFlag && (MacAddress == NULL))) {\r
294 //\r
295 // This is NULL, or it's a join operation but MacAddress is NULL.\r
296 //\r
297 return EFI_INVALID_PARAMETER;\r
298 }\r
299\r
300 Instance = MNP_INSTANCE_DATA_FROM_THIS (This);\r
301 SnpMode = Instance->MnpServiceData->Snp->Mode;\r
302\r
e48e37fc 303 OldTpl = gBS->RaiseTPL (TPL_CALLBACK);\r
8a67d61d 304\r
305 if (!Instance->Configured) {\r
306\r
307 Status = EFI_NOT_STARTED;\r
308 goto ON_EXIT;\r
309 }\r
310\r
311 if ((!Instance->ConfigData.EnableMulticastReceive) ||\r
312 ((MacAddress != NULL) && !NET_MAC_IS_MULTICAST (MacAddress, &SnpMode->BroadcastAddress, SnpMode->HwAddressSize))) {\r
313 //\r
314 // The instance isn't configured to do mulitcast receive. OR\r
315 // the passed in MacAddress is not a mutlticast mac address.\r
316 //\r
317 Status = EFI_INVALID_PARAMETER;\r
318 goto ON_EXIT;\r
319 }\r
320\r
321 Status = EFI_SUCCESS;\r
322 AddressExist = FALSE;\r
323 GroupCtrlBlk = NULL;\r
324\r
325 if (MacAddress != NULL) {\r
326 //\r
327 // Search the instance's GroupCtrlBlkList to find the specific address.\r
328 //\r
329 NET_LIST_FOR_EACH (ListEntry, &Instance->GroupCtrlBlkList) {\r
330\r
331 GroupCtrlBlk = NET_LIST_USER_STRUCT (\r
332 ListEntry,\r
333 MNP_GROUP_CONTROL_BLOCK,\r
334 CtrlBlkEntry\r
335 );\r
336 GroupAddress = GroupCtrlBlk->GroupAddress;\r
e48e37fc 337 if (0 == CompareMem (\r
8a67d61d 338 MacAddress,\r
339 &GroupAddress->Address,\r
340 SnpMode->HwAddressSize\r
341 )) {\r
342 //\r
343 // There is already the same multicast mac address configured.\r
344 //\r
345 AddressExist = TRUE;\r
346 break;\r
347 }\r
348 }\r
349\r
350 if (JoinFlag && AddressExist) {\r
351 //\r
352 // The multicast mac address to join already exists.\r
353 //\r
354 Status = EFI_ALREADY_STARTED;\r
355 }\r
356\r
357 if (!JoinFlag && !AddressExist) {\r
358 //\r
359 // The multicast mac address to leave doesn't exist in this instance.\r
360 //\r
361 Status = EFI_NOT_FOUND;\r
362 }\r
363\r
364 if (EFI_ERROR (Status)) {\r
365 goto ON_EXIT;\r
366 }\r
e48e37fc 367 } else if (IsListEmpty (&Instance->GroupCtrlBlkList)) {\r
8a67d61d 368 //\r
369 // The MacAddress is NULL and there is no configured multicast mac address,\r
370 // just return.\r
371 //\r
372 goto ON_EXIT;\r
373 }\r
374\r
375 //\r
376 // OK, it is time to take action.\r
377 //\r
378 Status = MnpGroupOp (Instance, JoinFlag, MacAddress, GroupCtrlBlk);\r
379\r
380ON_EXIT:\r
e48e37fc 381 gBS->RestoreTPL (OldTpl);\r
8a67d61d 382\r
383 return Status;\r
384}\r
385\r
386\r
387/**\r
388 Place an outgoing packet into the transmit queue.\r
389\r
390 @param This Pointer to the Managed Network Protocol.\r
391 @param Token Pointer to a token associated with the transmit\r
392 data descriptor.\r
393\r
394 @retval EFI_SUCCESS The operation completed successfully.\r
395 @retval EFI_INVALID_PARAMETER One or more parameter is invalid\r
396 @retval EFI_NOT_STARTED This MNP child driver instance has not been\r
397 configured.\r
398 @retval EFI_ACCESS_DENIED The transmit completion token is already in the\r
399 transmit queue.\r
400 @retval EFI_OUT_OF_RESOURCES The transmit data could not be queued due to a\r
401 lack of system resources (usually memory).\r
402 @retval EFI_DEVICE_ERROR An unexpected system or network error occurred.\r
403 The MNP child driver instance has been reset to\r
404 startup defaults.\r
405 @retval EFI_NOT_READY The transmit request could not be queued because\r
406 the transmit queue is full.\r
407\r
408**/\r
409EFI_STATUS\r
410EFIAPI\r
411MnpTransmit (\r
412 IN EFI_MANAGED_NETWORK_PROTOCOL *This,\r
413 IN EFI_MANAGED_NETWORK_COMPLETION_TOKEN *Token\r
414 )\r
415{\r
416 EFI_STATUS Status;\r
417 MNP_INSTANCE_DATA *Instance;\r
418 MNP_SERVICE_DATA *MnpServiceData;\r
419 UINT8 *PktBuf;\r
420 UINT32 PktLen;\r
421 EFI_TPL OldTpl;\r
422\r
423 if ((This == NULL) || (Token == NULL)) {\r
424\r
425 return EFI_INVALID_PARAMETER;\r
426 }\r
427\r
428 Instance = MNP_INSTANCE_DATA_FROM_THIS (This);\r
429\r
e48e37fc 430 OldTpl = gBS->RaiseTPL (TPL_CALLBACK);\r
8a67d61d 431\r
432 if (!Instance->Configured) {\r
433\r
434 Status = EFI_NOT_STARTED;\r
435 goto ON_EXIT;\r
436 }\r
437\r
438 if (!MnpIsValidTxToken (Instance, Token)) {\r
439 //\r
440 // The Token is invalid.\r
441 //\r
442 Status = EFI_INVALID_PARAMETER;\r
443 goto ON_EXIT;\r
444 }\r
445\r
446 MnpServiceData = Instance->MnpServiceData;\r
447 NET_CHECK_SIGNATURE (MnpServiceData, MNP_SERVICE_DATA_SIGNATURE);\r
448\r
449 //\r
450 // Build the tx packet\r
451 //\r
452 MnpBuildTxPacket (MnpServiceData, Token->Packet.TxData, &PktBuf, &PktLen);\r
453\r
454 //\r
455 // OK, send the packet synchronously.\r
456 //\r
457 Status = MnpSyncSendPacket (MnpServiceData, PktBuf, PktLen, Token);\r
458\r
459ON_EXIT:\r
e48e37fc 460 gBS->RestoreTPL (OldTpl);\r
8a67d61d 461\r
462 return Status;\r
463}\r
464\r
465\r
466/**\r
467 Place an asynchronous receiving request into the receiving queue.\r
468\r
469 @param This Pointer to the EFI_MANAGED_NETWORK_PROTOCOL\r
470 instance.\r
471 @param Token Pointer to a token associated with the receive\r
472 data descriptor.\r
473\r
474 @retval EFI_SUCCESS The receive completion token was cached.\r
475 @retval EFI_NOT_STARTED This MNP child driver instance has not been\r
476 configured.\r
477 @retval EFI_INVALID_PARAMETER One or more parameter is invalid.\r
478 @retval EFI_OUT_OF_RESOURCES The transmit data could not be queued due to a\r
479 lack of system resources (usually memory).\r
480 @retval EFI_DEVICE_ERROR An unexpected system or network error occurred.\r
481 The MNP child driver instance has been reset to\r
482 startup defaults.\r
483 @retval EFI_ACCESS_DENIED The receive completion token was already in the\r
484 receive queue.\r
485 @retval EFI_NOT_READY The receive request could not be queued because\r
486 the receive queue is full.\r
487\r
488**/\r
489EFI_STATUS\r
490EFIAPI\r
491MnpReceive (\r
492 IN EFI_MANAGED_NETWORK_PROTOCOL *This,\r
493 IN EFI_MANAGED_NETWORK_COMPLETION_TOKEN *Token\r
494 )\r
495{\r
496 EFI_STATUS Status;\r
497 MNP_INSTANCE_DATA *Instance;\r
498 EFI_TPL OldTpl;\r
499\r
500 if ((This == NULL) || (Token == NULL) || (Token->Event == NULL)) {\r
501\r
502 return EFI_INVALID_PARAMETER;\r
503 }\r
504\r
505 Instance = MNP_INSTANCE_DATA_FROM_THIS (This);\r
506\r
e48e37fc 507 OldTpl = gBS->RaiseTPL (TPL_CALLBACK);\r
8a67d61d 508\r
509 if (!Instance->Configured) {\r
510\r
511 Status = EFI_NOT_STARTED;\r
512 goto ON_EXIT;\r
513 }\r
514\r
515 //\r
516 // Check whether this token(event) is already in the rx token queue.\r
517 //\r
518 Status = NetMapIterate (&Instance->RxTokenMap, MnpTokenExist, (VOID *) Token);\r
519 if (EFI_ERROR (Status)) {\r
520\r
521 goto ON_EXIT;\r
522 }\r
523\r
524 //\r
525 // Insert the Token into the RxTokenMap.\r
526 //\r
527 Status = NetMapInsertTail (&Instance->RxTokenMap, (VOID *) Token, NULL);\r
528\r
529 if (!EFI_ERROR (Status)) {\r
530 //\r
531 // Try to deliver any buffered packets.\r
532 //\r
533 Status = MnpInstanceDeliverPacket (Instance);\r
36ee91ca 534\r
535 //\r
536 // Dispatch the DPC queued by the NotifyFunction of Token->Event.\r
537 //\r
538 NetLibDispatchDpc ();\r
8a67d61d 539 }\r
540\r
541ON_EXIT:\r
e48e37fc 542 gBS->RestoreTPL (OldTpl);\r
8a67d61d 543\r
544 return Status;\r
545}\r
546\r
547\r
548/**\r
549 Abort a pending transmit or receive request.\r
550\r
551 @param This Pointer to the EFI_MANAGED_NETWORK_PROTOCOL\r
552 instance.\r
553 @param Token Pointer to a token that has been issued by\r
554 EFI_MANAGED_NETWORK_PROTOCOL.Transmit() or\r
555 EFI_MANAGED_NETWORK_PROTOCOL.Receive(). If NULL,\r
556 all pending tokens are aborted.\r
557\r
558 @retval EFI_SUCCESS The asynchronous I/O request was aborted and\r
559 Token->Event was signaled.\r
560 @retval EFI_NOT_STARTED This MNP child driver instance has not been\r
561 configured.\r
562 @retval EFI_INVALID_PARAMETER This is NULL.\r
563 @retval EFI_NOT_FOUND The asynchronous I/O request was not found in the\r
564 transmit or receive queue. It has either completed\r
565 or was not issued by Transmit() and Receive().\r
566\r
567**/\r
568EFI_STATUS\r
569EFIAPI\r
570MnpCancel (\r
571 IN EFI_MANAGED_NETWORK_PROTOCOL *This,\r
572 IN EFI_MANAGED_NETWORK_COMPLETION_TOKEN *Token OPTIONAL\r
573 )\r
574{\r
575 EFI_STATUS Status;\r
576 MNP_INSTANCE_DATA *Instance;\r
577 EFI_TPL OldTpl;\r
578\r
579 if (This == NULL) {\r
580\r
581 return EFI_INVALID_PARAMETER;\r
582 }\r
583\r
584 Instance = MNP_INSTANCE_DATA_FROM_THIS (This);\r
585\r
e48e37fc 586 OldTpl = gBS->RaiseTPL (TPL_CALLBACK);\r
8a67d61d 587\r
588 if (!Instance->Configured) {\r
589\r
590 Status = EFI_NOT_STARTED;\r
591 goto ON_EXIT;\r
592 }\r
593\r
594 //\r
595 // Iterate the RxTokenMap to cancel the specified Token.\r
596 //\r
597 Status = NetMapIterate (&Instance->RxTokenMap, MnpCancelTokens, (VOID *) Token);\r
598\r
599 if (Token != NULL) {\r
600\r
601 Status = (Status == EFI_ABORTED) ? EFI_SUCCESS : EFI_NOT_FOUND;\r
602 }\r
603\r
36ee91ca 604 //\r
605 // Dispatch the DPC queued by the NotifyFunction of the cancled token's events.\r
606 //\r
607 NetLibDispatchDpc ();\r
608\r
8a67d61d 609ON_EXIT:\r
e48e37fc 610 gBS->RestoreTPL (OldTpl);\r
8a67d61d 611\r
612 return Status;\r
613}\r
614\r
615\r
616/**\r
617 Poll the network interface to do transmit/receive work.\r
618\r
619 @param This Pointer to the EFI_MANAGED_NETWORK_PROTOCOL\r
620 instance.\r
621\r
622 @retval EFI_SUCCESS Incoming or outgoing data was processed.\r
623 @retval EFI_NOT_STARTED This MNP child driver instance has not been\r
624 configured.\r
625 @retval EFI_DEVICE_ERROR An unexpected system or network error occurred.\r
626 The MNP child driver instance has been reset to\r
627 startup defaults.\r
628 @retval EFI_NOT_READY No incoming or outgoing data was processed.\r
629 @retval EFI_TIMEOUT Data was dropped out of the transmit and/or\r
630 receive queue.\r
631\r
632**/\r
633EFI_STATUS\r
634EFIAPI\r
635MnpPoll (\r
636 IN EFI_MANAGED_NETWORK_PROTOCOL *This\r
637 )\r
638{\r
639 EFI_STATUS Status;\r
640 MNP_INSTANCE_DATA *Instance;\r
641 EFI_TPL OldTpl;\r
642\r
643 if (This == NULL) {\r
644 return EFI_INVALID_PARAMETER;\r
645 }\r
646\r
647 Instance = MNP_INSTANCE_DATA_FROM_THIS (This);\r
648\r
e48e37fc 649 OldTpl = gBS->RaiseTPL (TPL_CALLBACK);\r
8a67d61d 650\r
651 if (!Instance->Configured) {\r
652 Status = EFI_NOT_STARTED;\r
653 goto ON_EXIT;\r
654 }\r
655\r
656 //\r
657 // Try to receive packets.\r
658 //\r
659 Status = MnpReceivePacket (Instance->MnpServiceData);\r
660\r
36ee91ca 661 NetLibDispatchDpc ();\r
662\r
8a67d61d 663ON_EXIT:\r
e48e37fc 664 gBS->RestoreTPL (OldTpl);\r
8a67d61d 665\r
666 return Status;\r
667}\r
36ee91ca 668\r