1 /**@file
2 Linux Packet Filter implementation of the EMU_SNP_PROTOCOL that allows the
3 emulator to get on real networks.
4
5 Currently only the Berkeley Packet Filter is fully implemented and this file
6 is just a template that needs to get filled in.
7
8 Copyright (c) 2004 - 2009, Intel Corporation. All rights reserved.<BR>
9 Portitions copyright (c) 2011, Apple Inc. All rights reserved.
10
11 This program and the accompanying materials
12 are licensed and made available under the terms and conditions of the BSD License
13 which accompanies this distribution. The full text of the license may be found at
14 http://opensource.org/licenses/bsd-license.php
15
16 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
17 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
18
19 **/
20
21
22 #include "Host.h"
23
24 #ifndef __APPLE__
25
26 #define EMU_SNP_PRIVATE_SIGNATURE SIGNATURE_32('E', 'M', 's', 'n')
27 typedef struct {
28 UINTN Signature;
29
30 EMU_IO_THUNK_PROTOCOL *Thunk;
31
32
33 EMU_SNP_PROTOCOL EmuSnp;
34 EFI_SIMPLE_NETWORK_MODE *Mode;
35
36 } EMU_SNP_PRIVATE;
37
38 #define EMU_SNP_PRIVATE_DATA_FROM_THIS(a) \
39 CR(a, EMU_SNP_PRIVATE, EmuSnp, EMU_SNP_PRIVATE_SIGNATURE)
40
41 /**
42 Register storage for SNP Mode.
43
44 @param This Protocol instance pointer.
45 @param Mode SimpleNetworkProtocol Mode structure passed into driver.
46
47 @retval EFI_SUCCESS The network interface was started.
48 @retval EFI_INVALID_PARAMETER One or more of the parameters has an unsupported value.
49
50 **/
51 EFI_STATUS
EmuSnpCreateMapping(IN EMU_SNP_PROTOCOL * This,IN EFI_SIMPLE_NETWORK_MODE * Mode)52 EmuSnpCreateMapping (
53 IN EMU_SNP_PROTOCOL *This,
54 IN EFI_SIMPLE_NETWORK_MODE *Mode
55 )
56 {
57 EMU_SNP_PRIVATE *Private;
58
59 Private = EMU_SNP_PRIVATE_DATA_FROM_THIS (This);
60
61 Private->Mode = Mode;
62
63 return EFI_SUCCESS;
64 }
65
66 /**
67 Changes the state of a network interface from "stopped" to "started".
68
69 @param This Protocol instance pointer.
70
71 @retval EFI_SUCCESS The network interface was started.
72 @retval EFI_ALREADY_STARTED The network interface is already in the started state.
73 @retval EFI_INVALID_PARAMETER One or more of the parameters has an unsupported value.
74 @retval EFI_DEVICE_ERROR The command could not be sent to the network interface.
75 @retval EFI_UNSUPPORTED This function is not supported by the network interface.
76
77 **/
78 EFI_STATUS
EmuSnpStart(IN EMU_SNP_PROTOCOL * This)79 EmuSnpStart (
80 IN EMU_SNP_PROTOCOL *This
81 )
82 {
83 EMU_SNP_PRIVATE *Private;
84
85 Private = EMU_SNP_PRIVATE_DATA_FROM_THIS (This);
86
87 return EFI_UNSUPPORTED;
88 }
89
90 /**
91 Changes the state of a network interface from "started" to "stopped".
92
93 @param This Protocol instance pointer.
94
95 @retval EFI_SUCCESS The network interface was stopped.
96 @retval EFI_ALREADY_STARTED The network interface is already in the stopped state.
97 @retval EFI_INVALID_PARAMETER One or more of the parameters has an unsupported value.
98 @retval EFI_DEVICE_ERROR The command could not be sent to the network interface.
99 @retval EFI_UNSUPPORTED This function is not supported by the network interface.
100
101 **/
102 EFI_STATUS
EmuSnpStop(IN EMU_SNP_PROTOCOL * This)103 EmuSnpStop (
104 IN EMU_SNP_PROTOCOL *This
105 )
106 {
107 EMU_SNP_PRIVATE *Private;
108
109 Private = EMU_SNP_PRIVATE_DATA_FROM_THIS (This);
110
111 return EFI_UNSUPPORTED;
112 }
113
114 /**
115 Resets a network adapter and allocates the transmit and receive buffers
116 required by the network interface; optionally, also requests allocation
117 of additional transmit and receive buffers.
118
119 @param This The protocol instance pointer.
120 @param ExtraRxBufferSize The size, in bytes, of the extra receive buffer space
121 that the driver should allocate for the network interface.
122 Some network interfaces will not be able to use the extra
123 buffer, and the caller will not know if it is actually
124 being used.
125 @param ExtraTxBufferSize The size, in bytes, of the extra transmit buffer space
126 that the driver should allocate for the network interface.
127 Some network interfaces will not be able to use the extra
128 buffer, and the caller will not know if it is actually
129 being used.
130
131 @retval EFI_SUCCESS The network interface was initialized.
132 @retval EFI_NOT_STARTED The network interface has not been started.
133 @retval EFI_OUT_OF_RESOURCES There was not enough memory for the transmit and
134 receive buffers.
135 @retval EFI_INVALID_PARAMETER One or more of the parameters has an unsupported value.
136 @retval EFI_DEVICE_ERROR The command could not be sent to the network interface.
137 @retval EFI_UNSUPPORTED This function is not supported by the network interface.
138
139 **/
140 EFI_STATUS
EmuSnpInitialize(IN EMU_SNP_PROTOCOL * This,IN UINTN ExtraRxBufferSize OPTIONAL,IN UINTN ExtraTxBufferSize OPTIONAL)141 EmuSnpInitialize (
142 IN EMU_SNP_PROTOCOL *This,
143 IN UINTN ExtraRxBufferSize OPTIONAL,
144 IN UINTN ExtraTxBufferSize OPTIONAL
145 )
146 {
147 EMU_SNP_PRIVATE *Private;
148
149 Private = EMU_SNP_PRIVATE_DATA_FROM_THIS (This);
150
151 return EFI_UNSUPPORTED;
152 }
153
154 /**
155 Resets a network adapter and re-initializes it with the parameters that were
156 provided in the previous call to Initialize().
157
158 @param This The protocol instance pointer.
159 @param ExtendedVerification Indicates that the driver may perform a more
160 exhaustive verification operation of the device
161 during reset.
162
163 @retval EFI_SUCCESS The network interface was reset.
164 @retval EFI_NOT_STARTED The network interface has not been started.
165 @retval EFI_INVALID_PARAMETER One or more of the parameters has an unsupported value.
166 @retval EFI_DEVICE_ERROR The command could not be sent to the network interface.
167 @retval EFI_UNSUPPORTED This function is not supported by the network interface.
168
169 **/
170 EFI_STATUS
EmuSnpReset(IN EMU_SNP_PROTOCOL * This,IN BOOLEAN ExtendedVerification)171 EmuSnpReset (
172 IN EMU_SNP_PROTOCOL *This,
173 IN BOOLEAN ExtendedVerification
174 )
175 {
176 EMU_SNP_PRIVATE *Private;
177
178 Private = EMU_SNP_PRIVATE_DATA_FROM_THIS (This);
179
180 return EFI_UNSUPPORTED;
181 }
182
183 /**
184 Resets a network adapter and leaves it in a state that is safe for
185 another driver to initialize.
186
187 @param This Protocol instance pointer.
188
189 @retval EFI_SUCCESS The network interface was shutdown.
190 @retval EFI_NOT_STARTED The network interface has not been started.
191 @retval EFI_INVALID_PARAMETER One or more of the parameters has an unsupported value.
192 @retval EFI_DEVICE_ERROR The command could not be sent to the network interface.
193 @retval EFI_UNSUPPORTED This function is not supported by the network interface.
194
195 **/
196 EFI_STATUS
EmuSnpShutdown(IN EMU_SNP_PROTOCOL * This)197 EmuSnpShutdown (
198 IN EMU_SNP_PROTOCOL *This
199 )
200 {
201 EMU_SNP_PRIVATE *Private;
202
203 Private = EMU_SNP_PRIVATE_DATA_FROM_THIS (This);
204
205 return EFI_UNSUPPORTED;
206 }
207
208 /**
209 Manages the multicast receive filters of a network interface.
210
211 @param This The protocol instance pointer.
212 @param Enable A bit mask of receive filters to enable on the network interface.
213 @param Disable A bit mask of receive filters to disable on the network interface.
214 @param ResetMCastFilter Set to TRUE to reset the contents of the multicast receive
215 filters on the network interface to their default values.
216 @param McastFilterCnt Number of multicast HW MAC addresses in the new
217 MCastFilter list. This value must be less than or equal to
218 the MCastFilterCnt field of EMU_SNP_MODE. This
219 field is optional if ResetMCastFilter is TRUE.
220 @param MCastFilter A pointer to a list of new multicast receive filter HW MAC
221 addresses. This list will replace any existing multicast
222 HW MAC address list. This field is optional if
223 ResetMCastFilter is TRUE.
224
225 @retval EFI_SUCCESS The multicast receive filter list was updated.
226 @retval EFI_NOT_STARTED The network interface has not been started.
227 @retval EFI_INVALID_PARAMETER One or more of the parameters has an unsupported value.
228 @retval EFI_DEVICE_ERROR The command could not be sent to the network interface.
229 @retval EFI_UNSUPPORTED This function is not supported by the network interface.
230
231 **/
232 EFI_STATUS
EmuSnpReceiveFilters(IN EMU_SNP_PROTOCOL * This,IN UINT32 Enable,IN UINT32 Disable,IN BOOLEAN ResetMCastFilter,IN UINTN MCastFilterCnt OPTIONAL,IN EFI_MAC_ADDRESS * MCastFilter OPTIONAL)233 EmuSnpReceiveFilters (
234 IN EMU_SNP_PROTOCOL *This,
235 IN UINT32 Enable,
236 IN UINT32 Disable,
237 IN BOOLEAN ResetMCastFilter,
238 IN UINTN MCastFilterCnt OPTIONAL,
239 IN EFI_MAC_ADDRESS *MCastFilter OPTIONAL
240 )
241 {
242 EMU_SNP_PRIVATE *Private;
243
244 Private = EMU_SNP_PRIVATE_DATA_FROM_THIS (This);
245
246 return EFI_UNSUPPORTED;
247 }
248
249 /**
250 Modifies or resets the current station address, if supported.
251
252 @param This The protocol instance pointer.
253 @param Reset Flag used to reset the station address to the network interfaces
254 permanent address.
255 @param New The new station address to be used for the network interface.
256
257 @retval EFI_SUCCESS The network interfaces station address was updated.
258 @retval EFI_NOT_STARTED The network interface has not been started.
259 @retval EFI_INVALID_PARAMETER One or more of the parameters has an unsupported value.
260 @retval EFI_DEVICE_ERROR The command could not be sent to the network interface.
261 @retval EFI_UNSUPPORTED This function is not supported by the network interface.
262
263 **/
264 EFI_STATUS
EmuSnpStationAddress(IN EMU_SNP_PROTOCOL * This,IN BOOLEAN Reset,IN EFI_MAC_ADDRESS * New OPTIONAL)265 EmuSnpStationAddress (
266 IN EMU_SNP_PROTOCOL *This,
267 IN BOOLEAN Reset,
268 IN EFI_MAC_ADDRESS *New OPTIONAL
269 )
270 {
271 EMU_SNP_PRIVATE *Private;
272
273 Private = EMU_SNP_PRIVATE_DATA_FROM_THIS (This);
274
275 return EFI_UNSUPPORTED;
276 }
277
278 /**
279 Resets or collects the statistics on a network interface.
280
281 @param This Protocol instance pointer.
282 @param Reset Set to TRUE to reset the statistics for the network interface.
283 @param StatisticsSize On input the size, in bytes, of StatisticsTable. On
284 output the size, in bytes, of the resulting table of
285 statistics.
286 @param StatisticsTable A pointer to the EFI_NETWORK_STATISTICS structure that
287 contains the statistics.
288
289 @retval EFI_SUCCESS The statistics were collected from the network interface.
290 @retval EFI_NOT_STARTED The network interface has not been started.
291 @retval EFI_BUFFER_TOO_SMALL The Statistics buffer was too small. The current buffer
292 size needed to hold the statistics is returned in
293 StatisticsSize.
294 @retval EFI_INVALID_PARAMETER One or more of the parameters has an unsupported value.
295 @retval EFI_DEVICE_ERROR The command could not be sent to the network interface.
296 @retval EFI_UNSUPPORTED This function is not supported by the network interface.
297
298 **/
299 EFI_STATUS
EmuSnpStatistics(IN EMU_SNP_PROTOCOL * This,IN BOOLEAN Reset,IN OUT UINTN * StatisticsSize OPTIONAL,OUT EFI_NETWORK_STATISTICS * StatisticsTable OPTIONAL)300 EmuSnpStatistics (
301 IN EMU_SNP_PROTOCOL *This,
302 IN BOOLEAN Reset,
303 IN OUT UINTN *StatisticsSize OPTIONAL,
304 OUT EFI_NETWORK_STATISTICS *StatisticsTable OPTIONAL
305 )
306 {
307 EMU_SNP_PRIVATE *Private;
308
309 Private = EMU_SNP_PRIVATE_DATA_FROM_THIS (This);
310
311 return EFI_UNSUPPORTED;
312 }
313
314 /**
315 Converts a multicast IP address to a multicast HW MAC address.
316
317 @param This The protocol instance pointer.
318 @param IPv6 Set to TRUE if the multicast IP address is IPv6 [RFC 2460]. Set
319 to FALSE if the multicast IP address is IPv4 [RFC 791].
320 @param IP The multicast IP address that is to be converted to a multicast
321 HW MAC address.
322 @param MAC The multicast HW MAC address that is to be generated from IP.
323
324 @retval EFI_SUCCESS The multicast IP address was mapped to the multicast
325 HW MAC address.
326 @retval EFI_NOT_STARTED The network interface has not been started.
327 @retval EFI_BUFFER_TOO_SMALL The Statistics buffer was too small. The current buffer
328 size needed to hold the statistics is returned in
329 StatisticsSize.
330 @retval EFI_INVALID_PARAMETER One or more of the parameters has an unsupported value.
331 @retval EFI_DEVICE_ERROR The command could not be sent to the network interface.
332 @retval EFI_UNSUPPORTED This function is not supported by the network interface.
333
334 **/
335 EFI_STATUS
EmuSnpMCastIpToMac(IN EMU_SNP_PROTOCOL * This,IN BOOLEAN IPv6,IN EFI_IP_ADDRESS * IP,OUT EFI_MAC_ADDRESS * MAC)336 EmuSnpMCastIpToMac (
337 IN EMU_SNP_PROTOCOL *This,
338 IN BOOLEAN IPv6,
339 IN EFI_IP_ADDRESS *IP,
340 OUT EFI_MAC_ADDRESS *MAC
341 )
342 {
343 EMU_SNP_PRIVATE *Private;
344
345 Private = EMU_SNP_PRIVATE_DATA_FROM_THIS (This);
346
347 return EFI_UNSUPPORTED;
348 }
349
350 /**
351 Performs read and write operations on the NVRAM device attached to a
352 network interface.
353
354 @param This The protocol instance pointer.
355 @param ReadWrite TRUE for read operations, FALSE for write operations.
356 @param Offset Byte offset in the NVRAM device at which to start the read or
357 write operation. This must be a multiple of NvRamAccessSize and
358 less than NvRamSize.
359 @param BufferSize The number of bytes to read or write from the NVRAM device.
360 This must also be a multiple of NvramAccessSize.
361 @param Buffer A pointer to the data buffer.
362
363 @retval EFI_SUCCESS The NVRAM access was performed.
364 @retval EFI_NOT_STARTED The network interface has not been started.
365 @retval EFI_INVALID_PARAMETER One or more of the parameters has an unsupported value.
366 @retval EFI_DEVICE_ERROR The command could not be sent to the network interface.
367 @retval EFI_UNSUPPORTED This function is not supported by the network interface.
368
369 **/
370 EFI_STATUS
EmuSnpNvData(IN EMU_SNP_PROTOCOL * This,IN BOOLEAN ReadWrite,IN UINTN Offset,IN UINTN BufferSize,IN OUT VOID * Buffer)371 EmuSnpNvData (
372 IN EMU_SNP_PROTOCOL *This,
373 IN BOOLEAN ReadWrite,
374 IN UINTN Offset,
375 IN UINTN BufferSize,
376 IN OUT VOID *Buffer
377 )
378 {
379 EMU_SNP_PRIVATE *Private;
380
381 Private = EMU_SNP_PRIVATE_DATA_FROM_THIS (This);
382
383 return EFI_UNSUPPORTED;
384 }
385
386 /**
387 Reads the current interrupt status and recycled transmit buffer status from
388 a network interface.
389
390 @param This The protocol instance pointer.
391 @param InterruptStatus A pointer to the bit mask of the currently active interrupts
392 If this is NULL, the interrupt status will not be read from
393 the device. If this is not NULL, the interrupt status will
394 be read from the device. When the interrupt status is read,
395 it will also be cleared. Clearing the transmit interrupt
396 does not empty the recycled transmit buffer array.
397 @param TxBuf Recycled transmit buffer address. The network interface will
398 not transmit if its internal recycled transmit buffer array
399 is full. Reading the transmit buffer does not clear the
400 transmit interrupt. If this is NULL, then the transmit buffer
401 status will not be read. If there are no transmit buffers to
402 recycle and TxBuf is not NULL, * TxBuf will be set to NULL.
403
404 @retval EFI_SUCCESS The status of the network interface was retrieved.
405 @retval EFI_NOT_STARTED The network interface has not been started.
406 @retval EFI_INVALID_PARAMETER One or more of the parameters has an unsupported value.
407 @retval EFI_DEVICE_ERROR The command could not be sent to the network interface.
408 @retval EFI_UNSUPPORTED This function is not supported by the network interface.
409
410 **/
411 EFI_STATUS
EmuSnpGetStatus(IN EMU_SNP_PROTOCOL * This,OUT UINT32 * InterruptStatus OPTIONAL,OUT VOID ** TxBuf OPTIONAL)412 EmuSnpGetStatus (
413 IN EMU_SNP_PROTOCOL *This,
414 OUT UINT32 *InterruptStatus OPTIONAL,
415 OUT VOID **TxBuf OPTIONAL
416 )
417 {
418 EMU_SNP_PRIVATE *Private;
419
420 Private = EMU_SNP_PRIVATE_DATA_FROM_THIS (This);
421
422 return EFI_UNSUPPORTED;
423 }
424
425 /**
426 Places a packet in the transmit queue of a network interface.
427
428 @param This The protocol instance pointer.
429 @param HeaderSize The size, in bytes, of the media header to be filled in by
430 the Transmit() function. If HeaderSize is non-zero, then it
431 must be equal to This->Mode->MediaHeaderSize and the DestAddr
432 and Protocol parameters must not be NULL.
433 @param BufferSize The size, in bytes, of the entire packet (media header and
434 data) to be transmitted through the network interface.
435 @param Buffer A pointer to the packet (media header followed by data) to be
436 transmitted. This parameter cannot be NULL. If HeaderSize is zero,
437 then the media header in Buffer must already be filled in by the
438 caller. If HeaderSize is non-zero, then the media header will be
439 filled in by the Transmit() function.
440 @param SrcAddr The source HW MAC address. If HeaderSize is zero, then this parameter
441 is ignored. If HeaderSize is non-zero and SrcAddr is NULL, then
442 This->Mode->CurrentAddress is used for the source HW MAC address.
443 @param DestAddr The destination HW MAC address. If HeaderSize is zero, then this
444 parameter is ignored.
445 @param Protocol The type of header to build. If HeaderSize is zero, then this
446 parameter is ignored. See RFC 1700, section "Ether Types", for
447 examples.
448
449 @retval EFI_SUCCESS The packet was placed on the transmit queue.
450 @retval EFI_NOT_STARTED The network interface has not been started.
451 @retval EFI_NOT_READY The network interface is too busy to accept this transmit request.
452 @retval EFI_BUFFER_TOO_SMALL The BufferSize parameter is too small.
453 @retval EFI_INVALID_PARAMETER One or more of the parameters has an unsupported value.
454 @retval EFI_DEVICE_ERROR The command could not be sent to the network interface.
455 @retval EFI_UNSUPPORTED This function is not supported by the network interface.
456
457 **/
458 EFI_STATUS
EmuSnpTransmit(IN EMU_SNP_PROTOCOL * This,IN UINTN HeaderSize,IN UINTN BufferSize,IN VOID * Buffer,IN EFI_MAC_ADDRESS * SrcAddr OPTIONAL,IN EFI_MAC_ADDRESS * DestAddr OPTIONAL,IN UINT16 * Protocol OPTIONAL)459 EmuSnpTransmit (
460 IN EMU_SNP_PROTOCOL *This,
461 IN UINTN HeaderSize,
462 IN UINTN BufferSize,
463 IN VOID *Buffer,
464 IN EFI_MAC_ADDRESS *SrcAddr OPTIONAL,
465 IN EFI_MAC_ADDRESS *DestAddr OPTIONAL,
466 IN UINT16 *Protocol OPTIONAL
467 )
468 {
469 EMU_SNP_PRIVATE *Private;
470
471 Private = EMU_SNP_PRIVATE_DATA_FROM_THIS (This);
472
473 return EFI_UNSUPPORTED;
474 }
475
476 /**
477 Receives a packet from a network interface.
478
479 @param This The protocol instance pointer.
480 @param HeaderSize The size, in bytes, of the media header received on the network
481 interface. If this parameter is NULL, then the media header size
482 will not be returned.
483 @param BufferSize On entry, the size, in bytes, of Buffer. On exit, the size, in
484 bytes, of the packet that was received on the network interface.
485 @param Buffer A pointer to the data buffer to receive both the media header and
486 the data.
487 @param SrcAddr The source HW MAC address. If this parameter is NULL, the
488 HW MAC source address will not be extracted from the media
489 header.
490 @param DestAddr The destination HW MAC address. If this parameter is NULL,
491 the HW MAC destination address will not be extracted from the
492 media header.
493 @param Protocol The media header type. If this parameter is NULL, then the
494 protocol will not be extracted from the media header. See
495 RFC 1700 section "Ether Types" for examples.
496
497 @retval EFI_SUCCESS The received data was stored in Buffer, and BufferSize has
498 been updated to the number of bytes received.
499 @retval EFI_NOT_STARTED The network interface has not been started.
500 @retval EFI_NOT_READY The network interface is too busy to accept this transmit
501 request.
502 @retval EFI_BUFFER_TOO_SMALL The BufferSize parameter is too small.
503 @retval EFI_INVALID_PARAMETER One or more of the parameters has an unsupported value.
504 @retval EFI_DEVICE_ERROR The command could not be sent to the network interface.
505 @retval EFI_UNSUPPORTED This function is not supported by the network interface.
506
507 **/
508 EFI_STATUS
EmuSnpReceive(IN EMU_SNP_PROTOCOL * This,OUT UINTN * HeaderSize OPTIONAL,IN OUT UINTN * BufferSize,OUT VOID * Buffer,OUT EFI_MAC_ADDRESS * SrcAddr OPTIONAL,OUT EFI_MAC_ADDRESS * DestAddr OPTIONAL,OUT UINT16 * Protocol OPTIONAL)509 EmuSnpReceive (
510 IN EMU_SNP_PROTOCOL *This,
511 OUT UINTN *HeaderSize OPTIONAL,
512 IN OUT UINTN *BufferSize,
513 OUT VOID *Buffer,
514 OUT EFI_MAC_ADDRESS *SrcAddr OPTIONAL,
515 OUT EFI_MAC_ADDRESS *DestAddr OPTIONAL,
516 OUT UINT16 *Protocol OPTIONAL
517 )
518 {
519 EMU_SNP_PRIVATE *Private;
520
521 Private = EMU_SNP_PRIVATE_DATA_FROM_THIS (This);
522
523 return EFI_UNSUPPORTED;
524 }
525
526
527 EMU_SNP_PROTOCOL gEmuSnpProtocol = {
528 GasketSnpCreateMapping,
529 GasketSnpStart,
530 GasketSnpStop,
531 GasketSnpInitialize,
532 GasketSnpReset,
533 GasketSnpShutdown,
534 GasketSnpReceiveFilters,
535 GasketSnpStationAddress,
536 GasketSnpStatistics,
537 GasketSnpMCastIpToMac,
538 GasketSnpNvData,
539 GasketSnpGetStatus,
540 GasketSnpTransmit,
541 GasketSnpReceive
542 };
543
544 EFI_STATUS
EmuSnpThunkOpen(IN EMU_IO_THUNK_PROTOCOL * This)545 EmuSnpThunkOpen (
546 IN EMU_IO_THUNK_PROTOCOL *This
547 )
548 {
549 EMU_SNP_PRIVATE *Private;
550
551 if (This->Private != NULL) {
552 return EFI_ALREADY_STARTED;
553 }
554
555 if (!CompareGuid (This->Protocol, &gEmuSnpProtocolGuid)) {
556 return EFI_UNSUPPORTED;
557 }
558
559 Private = malloc (sizeof (EMU_SNP_PRIVATE));
560 if (Private == NULL) {
561 return EFI_OUT_OF_RESOURCES;
562 }
563
564
565 Private->Signature = EMU_SNP_PRIVATE_SIGNATURE;
566 Private->Thunk = This;
567 CopyMem (&Private->EmuSnp, &gEmuSnpProtocol, sizeof (gEmuSnpProtocol));
568
569 This->Interface = &Private->EmuSnp;
570 This->Private = Private;
571 return EFI_SUCCESS;
572 }
573
574
575 EFI_STATUS
EmuSnpThunkClose(IN EMU_IO_THUNK_PROTOCOL * This)576 EmuSnpThunkClose (
577 IN EMU_IO_THUNK_PROTOCOL *This
578 )
579 {
580 EMU_SNP_PRIVATE *Private;
581
582 if (!CompareGuid (This->Protocol, &gEmuSnpProtocolGuid)) {
583 return EFI_UNSUPPORTED;
584 }
585
586 Private = This->Private;
587 free (Private);
588
589 return EFI_SUCCESS;
590 }
591
592
593
594 EMU_IO_THUNK_PROTOCOL gSnpThunkIo = {
595 &gEmuSnpProtocolGuid,
596 NULL,
597 NULL,
598 0,
599 GasketSnpThunkOpen,
600 GasketSnpThunkClose,
601 NULL
602 };
603
604 #endif
605