[mirror_edk2.git] / MdeModulePkg / Universal / Network / SnpDxe / Callback.c

/** @file\r
  This file contains the callback routines for undi3.1.\r
  the callback routines for Undi3.1 have an extra parameter UniqueId which\r
  stores the interface context for the NIC that snp is trying to talk.\r
\r
Copyright (c) 2006 - 2014, Intel Corporation. All rights reserved.<BR>\r
This program and the accompanying materials\r
are licensed and made available under the terms and conditions of the BSD License\r
which accompanies this distribution.  The full text of the license may be found at\r
http://opensource.org/licenses/bsd-license.php\r
\r
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
\r
**/\r
\r
#include "Snp.h"\r
\r
/**\r
  Acquire or release a lock of the exclusive access to a critical section of the\r
  code/data.\r
\r
  This is a callback routine supplied to UNDI3.1 at undi_start time.\r
  New callbacks for 3.1: there won't be a virtual2physical callback for UNDI 3.1\r
  because undi3.1 uses the MemMap call to map the required address by itself!\r
\r
  @param UniqueId  This was supplied to UNDI at Undi_Start, SNP uses this to\r
                      store Undi interface context (Undi does not read or write\r
                      this variable).\r
  @param Enable    Non-zero indicates acquire; Zero indicates release.\r
\r
**/\r
VOID\r
EFIAPI\r
SnpUndi32CallbackBlock (\r
  IN UINT64 UniqueId,\r
  IN UINT32 Enable\r
  )\r
{\r
  SNP_DRIVER  *Snp;\r
\r
  Snp = (SNP_DRIVER *) (UINTN) UniqueId;\r
  //\r
  // tcpip was calling snp at tpl_notify and when we acquire a lock that was\r
  // created at a lower level (TPL_CALLBACK) it gives an assert!\r
  //\r
  if (Enable != 0) {\r
    EfiAcquireLock (&Snp->Lock);\r
  } else {\r
    EfiReleaseLock (&Snp->Lock);\r
  }\r
}\r
\r
/**\r
  Delay MicroSeconds of micro seconds.\r
\r
  This is a callback routine supplied to UNDI at undi_start time.\r
\r
  @param UniqueId      This was supplied to UNDI at Undi_Start, SNP uses this to\r
                       store Undi interface context (Undi does not read or write\r
                       this variable).\r
  @param MicroSeconds  Number of micro seconds to pause, ususlly multiple of 10.\r
\r
**/\r
VOID\r
EFIAPI\r
SnpUndi32CallbackDelay (\r
  IN UINT64 UniqueId,\r
  IN UINT64 MicroSeconds\r
  )\r
{\r
  if (MicroSeconds != 0) {\r
    gBS->Stall ((UINTN) MicroSeconds);\r
  }\r
}\r
\r
/**\r
  IO routine for UNDI3.1.\r
\r
  This is a callback routine supplied to UNDI at undi_start time.\r
\r
  @param UniqueId       This was supplied to UNDI at Undi_Start, SNP uses this\r
                        to store Undi interface context (Undi does not read or\r
                        write this variable).\r
  @param ReadOrWrite    Indicates read or write, IO or Memory.\r
  @param NumBytes       Number of bytes to read or write.\r
  @param MemOrPortAddr  IO or memory address to read from or write to.\r
  @param BufferPtr      Memory location to read into or that contains the bytes\r
                        to write.\r
\r
**/\r
VOID\r
EFIAPI\r
SnpUndi32CallbackMemio (\r
  IN UINT64     UniqueId,\r
  IN UINT8      ReadOrWrite,\r
  IN UINT8      NumBytes,\r
  IN UINT64     MemOrPortAddr,\r
  IN OUT UINT64 BufferPtr\r
  )\r
{\r
  SNP_DRIVER                *Snp;\r
  EFI_PCI_IO_PROTOCOL_WIDTH Width;\r
\r
  Snp   = (SNP_DRIVER *) (UINTN) UniqueId;\r
\r
  Width = (EFI_PCI_IO_PROTOCOL_WIDTH) 0;\r
  switch (NumBytes) {\r
  case 2:\r
    Width = (EFI_PCI_IO_PROTOCOL_WIDTH) 1;\r
    break;\r
\r
  case 4:\r
    Width = (EFI_PCI_IO_PROTOCOL_WIDTH) 2;\r
    break;\r
\r
  case 8:\r
    Width = (EFI_PCI_IO_PROTOCOL_WIDTH) 3;\r
    break;\r
  }\r
\r
  switch (ReadOrWrite) {\r
  case PXE_IO_READ:\r
    Snp->PciIo->Io.Read (\r
                     Snp->PciIo,\r
                     Width,\r
                     Snp->IoBarIndex,      // BAR 1 (for 32bit regs), IO base address\r
                     MemOrPortAddr,\r
                     1,                    // count\r
                     (VOID *) (UINTN) BufferPtr\r
                     );\r
    break;\r
\r
  case PXE_IO_WRITE:\r
    Snp->PciIo->Io.Write (\r
                     Snp->PciIo,\r
                     Width,\r
                     Snp->IoBarIndex,      // BAR 1 (for 32bit regs), IO base address\r
                     MemOrPortAddr,\r
                     1,                    // count\r
                     (VOID *) (UINTN) BufferPtr\r
                     );\r
    break;\r
\r
  case PXE_MEM_READ:\r
    Snp->PciIo->Mem.Read (\r
                      Snp->PciIo,\r
                      Width,\r
                      Snp->MemoryBarIndex,  // BAR 0, Memory base address\r
                      MemOrPortAddr,\r
                      1,                    // count\r
                      (VOID *) (UINTN) BufferPtr\r
                      );\r
    break;\r
\r
  case PXE_MEM_WRITE:\r
    Snp->PciIo->Mem.Write (\r
                      Snp->PciIo,\r
                      Width,\r
                      Snp->MemoryBarIndex,  // BAR 0, Memory base address\r
                      MemOrPortAddr,\r
                      1,                    // count\r
                      (VOID *) (UINTN) BufferPtr\r
                      );\r
    break;\r
  }\r
\r
  return ;\r
}\r
\r
/**\r
  Map a CPU address to a device address.\r
\r
  This is a callback routine supplied to UNDI at undi_start time.\r
\r
  @param UniqueId      This was supplied to UNDI at Undi_Start, SNP uses this to\r
                       store Undi interface context (Undi does not read or write\r
                       this variable).\r
  @param CpuAddr       Virtual address to be mapped.\r
  @param NumBytes      Size of memory to be mapped.\r
  @param Direction     Direction of data flow for this memory's usage:\r
                       cpu->device, device->cpu or both ways.\r
  @param DeviceAddrPtr Pointer to return the mapped device address.\r
\r
**/\r
VOID\r
EFIAPI\r
SnpUndi32CallbackMap (\r
  IN UINT64     UniqueId,\r
  IN UINT64     CpuAddr,\r
  IN UINT32     NumBytes,\r
  IN UINT32     Direction,\r
  IN OUT UINT64 DeviceAddrPtr\r
  )\r
{\r
  EFI_PHYSICAL_ADDRESS          *DevAddrPtr;\r
  EFI_PCI_IO_PROTOCOL_OPERATION DirectionFlag;\r
  UINTN                         BuffSize;\r
  SNP_DRIVER                    *Snp;\r
  UINTN                         Index;\r
  EFI_STATUS                    Status;\r
\r
  BuffSize    = (UINTN) NumBytes;\r
  Snp         = (SNP_DRIVER *) (UINTN) UniqueId;\r
  DevAddrPtr  = (EFI_PHYSICAL_ADDRESS *) (UINTN) DeviceAddrPtr;\r
\r
  if (CpuAddr == 0) {\r
    *DevAddrPtr = 0;\r
    return ;\r
  }\r
\r
  switch (Direction) {\r
  case TO_AND_FROM_DEVICE:\r
    DirectionFlag = EfiPciIoOperationBusMasterCommonBuffer;\r
    break;\r
\r
  case FROM_DEVICE:\r
    DirectionFlag = EfiPciIoOperationBusMasterWrite;\r
    break;\r
\r
  case TO_DEVICE:\r
    DirectionFlag = EfiPciIoOperationBusMasterRead;\r
    break;\r
\r
  default:\r
    *DevAddrPtr = 0;\r
    //\r
    // any non zero indicates error!\r
    //\r
    return ;\r
  }\r
  //\r
  // find an unused map_list entry\r
  //\r
  for (Index = 0; Index < MAX_MAP_LENGTH; Index++) {\r
    if (Snp->MapList[Index].VirtualAddress == 0) {\r
      break;\r
    }\r
  }\r
\r
  if (Index >= MAX_MAP_LENGTH) {\r
    DEBUG ((EFI_D_INFO, "SNP maplist is FULL\n"));\r
    *DevAddrPtr = 0;\r
    return ;\r
  }\r
\r
  Snp->MapList[Index].VirtualAddress = (EFI_PHYSICAL_ADDRESS) CpuAddr;\r
\r
  Status = Snp->PciIo->Map (\r
                         Snp->PciIo,\r
                         DirectionFlag,\r
                         (VOID *) (UINTN) CpuAddr,\r
                         &BuffSize,\r
                         DevAddrPtr,\r
                         &(Snp->MapList[Index].MapCookie)\r
                         );\r
  if (Status != EFI_SUCCESS) {\r
    *DevAddrPtr                        = 0;\r
    Snp->MapList[Index].VirtualAddress = 0;\r
  }\r
\r
  return ;\r
}\r
\r
/**\r
  Unmap an address that was previously mapped using map callback.\r
\r
  This is a callback routine supplied to UNDI at undi_start time.\r
\r
  @param UniqueId    This was supplied to UNDI at Undi_Start, SNP uses this to\r
                     store. Undi interface context (Undi does not read or write\r
                     this variable).\r
  @param CpuAddr     Virtual address that was mapped.\r
  @param NumBytes    Size of memory mapped.\r
  @param Direction   Direction of data flow for this memory's usage:\r
                     cpu->device, device->cpu or both ways.\r
  @param DeviceAddr  The mapped device address.\r
\r
**/\r
VOID\r
EFIAPI\r
SnpUndi32CallbackUnmap (\r
  IN UINT64 UniqueId,\r
  IN UINT64 CpuAddr,\r
  IN UINT32 NumBytes,\r
  IN UINT32 Direction,\r
  IN UINT64 DeviceAddr\r
  )\r
{\r
  SNP_DRIVER  *Snp;\r
  UINT16      Index;\r
\r
  Snp = (SNP_DRIVER *) (UINTN) UniqueId;\r
\r
  for (Index = 0; Index < MAX_MAP_LENGTH; Index++) {\r
    if (Snp->MapList[Index].VirtualAddress == CpuAddr) {\r
      break;\r
    }\r
  }\r
\r
  if (Index >= MAX_MAP_LENGTH) {\r
    DEBUG ((EFI_D_ERROR, "SNP could not find a mapping, failed to unmap.\n"));\r
    return ;\r
  }\r
\r
  Snp->PciIo->Unmap (Snp->PciIo, Snp->MapList[Index].MapCookie);\r
  Snp->MapList[Index].VirtualAddress = 0;\r
  Snp->MapList[Index].MapCookie      = NULL;\r
  return ;\r
}\r
\r
/**\r
  Synchronize the virtual buffer contents with the mapped buffer contents.\r
\r
  This is a callback routine supplied to UNDI at undi_start time. The virtual\r
  and mapped buffers need not correspond to the same physical memory (especially\r
  if the virtual address is > 4GB). Depending on the direction for which the\r
  buffer is mapped, undi will need to synchronize their contents whenever it\r
  writes to/reads from the buffer using either the cpu address or the device\r
  address.\r
  EFI does not provide a sync call since virt=physical, we should just do the\r
  synchronization ourselves here.\r
\r
  @param UniqueId    This was supplied to UNDI at Undi_Start, SNP uses this to\r
                     store Undi interface context (Undi does not read or write\r
                     this variable).\r
  @param CpuAddr     Virtual address that was mapped.\r
  @param NumBytes    Size of memory mapped.\r
  @param Direction   Direction of data flow for this memory's usage:\r
                     cpu->device, device->cpu or both ways.\r
  @param DeviceAddr  The mapped device address.\r
\r
**/\r
VOID\r
EFIAPI\r
SnpUndi32CallbackSync (\r
  IN UINT64             UniqueId,\r
  IN UINT64             CpuAddr,\r
  IN UINT32             NumBytes,\r
  IN UINT32             Direction,\r
  IN UINT64             DeviceAddr\r
  )\r
{\r
  if ((CpuAddr == 0) || (DeviceAddr == 0) || (NumBytes == 0)) {\r
    return ;\r
\r
  }\r
\r
  switch (Direction) {\r
  case FROM_DEVICE:\r
    CopyMem ((UINT8 *) (UINTN) CpuAddr, (UINT8 *) (UINTN) DeviceAddr, NumBytes);\r
    break;\r
\r
  case TO_DEVICE:\r
    CopyMem ((UINT8 *) (UINTN) DeviceAddr, (UINT8 *) (UINTN) CpuAddr, NumBytes);\r
    break;\r
  }\r
\r
  return ;\r
}\r
Commit	Line	Data
	1	/** @file\r
	2	This file contains the callback routines for undi3.1.\r
	3	the callback routines for Undi3.1 have an extra parameter UniqueId which\r
	4	stores the interface context for the NIC that snp is trying to talk.\r
	5	\r
	6	Copyright (c) 2006 - 2014, Intel Corporation. All rights reserved.<BR>\r
	7	This program and the accompanying materials\r
	8	are licensed and made available under the terms and conditions of the BSD License\r
	9	which accompanies this distribution. The full text of the license may be found at\r
	10	http://opensource.org/licenses/bsd-license.php\r
	11	\r
	12	THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
	13	WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
	14	\r
	15	**/\r
	16	\r
	17	#include "Snp.h"\r
	18	\r
	19	/**\r
	20	Acquire or release a lock of the exclusive access to a critical section of the\r
	21	code/data.\r
	22	\r
	23	This is a callback routine supplied to UNDI3.1 at undi_start time.\r
	24	New callbacks for 3.1: there won't be a virtual2physical callback for UNDI 3.1\r
	25	because undi3.1 uses the MemMap call to map the required address by itself!\r
	26	\r
	27	@param UniqueId This was supplied to UNDI at Undi_Start, SNP uses this to\r
	28	store Undi interface context (Undi does not read or write\r
	29	this variable).\r
	30	@param Enable Non-zero indicates acquire; Zero indicates release.\r
	31	\r
	32	**/\r
	33	VOID\r
	34	EFIAPI\r
	35	SnpUndi32CallbackBlock (\r
	36	IN UINT64 UniqueId,\r
	37	IN UINT32 Enable\r
	38	)\r
	39	{\r
	40	SNP_DRIVER *Snp;\r
	41	\r
	42	Snp = (SNP_DRIVER *) (UINTN) UniqueId;\r
	43	//\r
	44	// tcpip was calling snp at tpl_notify and when we acquire a lock that was\r
	45	// created at a lower level (TPL_CALLBACK) it gives an assert!\r
	46	//\r
	47	if (Enable != 0) {\r
	48	EfiAcquireLock (&Snp->Lock);\r
	49	} else {\r
	50	EfiReleaseLock (&Snp->Lock);\r
	51	}\r
	52	}\r
	53	\r
	54	/**\r
	55	Delay MicroSeconds of micro seconds.\r
	56	\r
	57	This is a callback routine supplied to UNDI at undi_start time.\r
	58	\r
	59	@param UniqueId This was supplied to UNDI at Undi_Start, SNP uses this to\r
	60	store Undi interface context (Undi does not read or write\r
	61	this variable).\r
	62	@param MicroSeconds Number of micro seconds to pause, ususlly multiple of 10.\r
	63	\r
	64	**/\r
	65	VOID\r
	66	EFIAPI\r
	67	SnpUndi32CallbackDelay (\r
	68	IN UINT64 UniqueId,\r
	69	IN UINT64 MicroSeconds\r
	70	)\r
	71	{\r
	72	if (MicroSeconds != 0) {\r
	73	gBS->Stall ((UINTN) MicroSeconds);\r
	74	}\r
	75	}\r
	76	\r
	77	/**\r
	78	IO routine for UNDI3.1.\r
	79	\r
	80	This is a callback routine supplied to UNDI at undi_start time.\r
	81	\r
	82	@param UniqueId This was supplied to UNDI at Undi_Start, SNP uses this\r
	83	to store Undi interface context (Undi does not read or\r
	84	write this variable).\r
	85	@param ReadOrWrite Indicates read or write, IO or Memory.\r
	86	@param NumBytes Number of bytes to read or write.\r
	87	@param MemOrPortAddr IO or memory address to read from or write to.\r
	88	@param BufferPtr Memory location to read into or that contains the bytes\r
	89	to write.\r
	90	\r
	91	**/\r
	92	VOID\r
	93	EFIAPI\r
	94	SnpUndi32CallbackMemio (\r
	95	IN UINT64 UniqueId,\r
	96	IN UINT8 ReadOrWrite,\r
	97	IN UINT8 NumBytes,\r
	98	IN UINT64 MemOrPortAddr,\r
	99	IN OUT UINT64 BufferPtr\r
	100	)\r
	101	{\r
	102	SNP_DRIVER *Snp;\r
	103	EFI_PCI_IO_PROTOCOL_WIDTH Width;\r
	104	\r
	105	Snp = (SNP_DRIVER *) (UINTN) UniqueId;\r
	106	\r
	107	Width = (EFI_PCI_IO_PROTOCOL_WIDTH) 0;\r
	108	switch (NumBytes) {\r
	109	case 2:\r
	110	Width = (EFI_PCI_IO_PROTOCOL_WIDTH) 1;\r
	111	break;\r
	112	\r
	113	case 4:\r
	114	Width = (EFI_PCI_IO_PROTOCOL_WIDTH) 2;\r
	115	break;\r
	116	\r
	117	case 8:\r
	118	Width = (EFI_PCI_IO_PROTOCOL_WIDTH) 3;\r
	119	break;\r
	120	}\r
	121	\r
	122	switch (ReadOrWrite) {\r
	123	case PXE_IO_READ:\r
	124	Snp->PciIo->Io.Read (\r
	125	Snp->PciIo,\r
	126	Width,\r
	127	Snp->IoBarIndex, // BAR 1 (for 32bit regs), IO base address\r
	128	MemOrPortAddr,\r
	129	1, // count\r
	130	(VOID *) (UINTN) BufferPtr\r
	131	);\r
	132	break;\r
	133	\r
	134	case PXE_IO_WRITE:\r
	135	Snp->PciIo->Io.Write (\r
	136	Snp->PciIo,\r
	137	Width,\r
	138	Snp->IoBarIndex, // BAR 1 (for 32bit regs), IO base address\r
	139	MemOrPortAddr,\r
	140	1, // count\r
	141	(VOID *) (UINTN) BufferPtr\r
	142	);\r
	143	break;\r
	144	\r
	145	case PXE_MEM_READ:\r
	146	Snp->PciIo->Mem.Read (\r
	147	Snp->PciIo,\r
	148	Width,\r
	149	Snp->MemoryBarIndex, // BAR 0, Memory base address\r
	150	MemOrPortAddr,\r
	151	1, // count\r
	152	(VOID *) (UINTN) BufferPtr\r
	153	);\r
	154	break;\r
	155	\r
	156	case PXE_MEM_WRITE:\r
	157	Snp->PciIo->Mem.Write (\r
	158	Snp->PciIo,\r
	159	Width,\r
	160	Snp->MemoryBarIndex, // BAR 0, Memory base address\r
	161	MemOrPortAddr,\r
	162	1, // count\r
	163	(VOID *) (UINTN) BufferPtr\r
	164	);\r
	165	break;\r
	166	}\r
	167	\r
	168	return ;\r
	169	}\r
	170	\r
	171	/**\r
	172	Map a CPU address to a device address.\r
	173	\r
	174	This is a callback routine supplied to UNDI at undi_start time.\r
	175	\r
	176	@param UniqueId This was supplied to UNDI at Undi_Start, SNP uses this to\r
	177	store Undi interface context (Undi does not read or write\r
	178	this variable).\r
	179	@param CpuAddr Virtual address to be mapped.\r
	180	@param NumBytes Size of memory to be mapped.\r
	181	@param Direction Direction of data flow for this memory's usage:\r
	182	cpu->device, device->cpu or both ways.\r
	183	@param DeviceAddrPtr Pointer to return the mapped device address.\r
	184	\r
	185	**/\r
	186	VOID\r
	187	EFIAPI\r
	188	SnpUndi32CallbackMap (\r
	189	IN UINT64 UniqueId,\r
	190	IN UINT64 CpuAddr,\r
	191	IN UINT32 NumBytes,\r
	192	IN UINT32 Direction,\r
	193	IN OUT UINT64 DeviceAddrPtr\r
	194	)\r
	195	{\r
	196	EFI_PHYSICAL_ADDRESS *DevAddrPtr;\r
	197	EFI_PCI_IO_PROTOCOL_OPERATION DirectionFlag;\r
	198	UINTN BuffSize;\r
	199	SNP_DRIVER *Snp;\r
	200	UINTN Index;\r
	201	EFI_STATUS Status;\r
	202	\r
	203	BuffSize = (UINTN) NumBytes;\r
	204	Snp = (SNP_DRIVER *) (UINTN) UniqueId;\r
	205	DevAddrPtr = (EFI_PHYSICAL_ADDRESS *) (UINTN) DeviceAddrPtr;\r
	206	\r
	207	if (CpuAddr == 0) {\r
	208	*DevAddrPtr = 0;\r
	209	return ;\r
	210	}\r
	211	\r
	212	switch (Direction) {\r
	213	case TO_AND_FROM_DEVICE:\r
	214	DirectionFlag = EfiPciIoOperationBusMasterCommonBuffer;\r
	215	break;\r
	216	\r
	217	case FROM_DEVICE:\r
	218	DirectionFlag = EfiPciIoOperationBusMasterWrite;\r
	219	break;\r
	220	\r
	221	case TO_DEVICE:\r
	222	DirectionFlag = EfiPciIoOperationBusMasterRead;\r
	223	break;\r
	224	\r
	225	default:\r
	226	*DevAddrPtr = 0;\r
	227	//\r
	228	// any non zero indicates error!\r
	229	//\r
	230	return ;\r
	231	}\r
	232	//\r
	233	// find an unused map_list entry\r
	234	//\r
	235	for (Index = 0; Index < MAX_MAP_LENGTH; Index++) {\r
	236	if (Snp->MapList[Index].VirtualAddress == 0) {\r
	237	break;\r
	238	}\r
	239	}\r
	240	\r
	241	if (Index >= MAX_MAP_LENGTH) {\r
	242	DEBUG ((EFI_D_INFO, "SNP maplist is FULL\n"));\r
	243	*DevAddrPtr = 0;\r
	244	return ;\r
	245	}\r
	246	\r
	247	Snp->MapList[Index].VirtualAddress = (EFI_PHYSICAL_ADDRESS) CpuAddr;\r
	248	\r
	249	Status = Snp->PciIo->Map (\r
	250	Snp->PciIo,\r
	251	DirectionFlag,\r
	252	(VOID *) (UINTN) CpuAddr,\r
	253	&BuffSize,\r
	254	DevAddrPtr,\r
	255	&(Snp->MapList[Index].MapCookie)\r
	256	);\r
	257	if (Status != EFI_SUCCESS) {\r
	258	*DevAddrPtr = 0;\r
	259	Snp->MapList[Index].VirtualAddress = 0;\r
	260	}\r
	261	\r
	262	return ;\r
	263	}\r
	264	\r
	265	/**\r
	266	Unmap an address that was previously mapped using map callback.\r
	267	\r
	268	This is a callback routine supplied to UNDI at undi_start time.\r
	269	\r
	270	@param UniqueId This was supplied to UNDI at Undi_Start, SNP uses this to\r
	271	store. Undi interface context (Undi does not read or write\r
	272	this variable).\r
	273	@param CpuAddr Virtual address that was mapped.\r
	274	@param NumBytes Size of memory mapped.\r
	275	@param Direction Direction of data flow for this memory's usage:\r
	276	cpu->device, device->cpu or both ways.\r
	277	@param DeviceAddr The mapped device address.\r
	278	\r
	279	**/\r
	280	VOID\r
	281	EFIAPI\r
	282	SnpUndi32CallbackUnmap (\r
	283	IN UINT64 UniqueId,\r
	284	IN UINT64 CpuAddr,\r
	285	IN UINT32 NumBytes,\r
	286	IN UINT32 Direction,\r
	287	IN UINT64 DeviceAddr\r
	288	)\r
	289	{\r
	290	SNP_DRIVER *Snp;\r
	291	UINT16 Index;\r
	292	\r
	293	Snp = (SNP_DRIVER *) (UINTN) UniqueId;\r
	294	\r
	295	for (Index = 0; Index < MAX_MAP_LENGTH; Index++) {\r
	296	if (Snp->MapList[Index].VirtualAddress == CpuAddr) {\r
	297	break;\r
	298	}\r
	299	}\r
	300	\r
	301	if (Index >= MAX_MAP_LENGTH) {\r
	302	DEBUG ((EFI_D_ERROR, "SNP could not find a mapping, failed to unmap.\n"));\r
	303	return ;\r
	304	}\r
	305	\r
	306	Snp->PciIo->Unmap (Snp->PciIo, Snp->MapList[Index].MapCookie);\r
	307	Snp->MapList[Index].VirtualAddress = 0;\r
	308	Snp->MapList[Index].MapCookie = NULL;\r
	309	return ;\r
	310	}\r
	311	\r
	312	/**\r
	313	Synchronize the virtual buffer contents with the mapped buffer contents.\r
	314	\r
	315	This is a callback routine supplied to UNDI at undi_start time. The virtual\r
	316	and mapped buffers need not correspond to the same physical memory (especially\r
	317	if the virtual address is > 4GB). Depending on the direction for which the\r
	318	buffer is mapped, undi will need to synchronize their contents whenever it\r
	319	writes to/reads from the buffer using either the cpu address or the device\r
	320	address.\r
	321	EFI does not provide a sync call since virt=physical, we should just do the\r
	322	synchronization ourselves here.\r
	323	\r
	324	@param UniqueId This was supplied to UNDI at Undi_Start, SNP uses this to\r
	325	store Undi interface context (Undi does not read or write\r
	326	this variable).\r
	327	@param CpuAddr Virtual address that was mapped.\r
	328	@param NumBytes Size of memory mapped.\r
	329	@param Direction Direction of data flow for this memory's usage:\r
	330	cpu->device, device->cpu or both ways.\r
	331	@param DeviceAddr The mapped device address.\r
	332	\r
	333	**/\r
	334	VOID\r
	335	EFIAPI\r
	336	SnpUndi32CallbackSync (\r
	337	IN UINT64 UniqueId,\r
	338	IN UINT64 CpuAddr,\r
	339	IN UINT32 NumBytes,\r
	340	IN UINT32 Direction,\r
	341	IN UINT64 DeviceAddr\r
	342	)\r
	343	{\r
	344	if ((CpuAddr == 0) \|\| (DeviceAddr == 0) \|\| (NumBytes == 0)) {\r
	345	return ;\r
	346	\r
	347	}\r
	348	\r
	349	switch (Direction) {\r
	350	case FROM_DEVICE:\r
	351	CopyMem ((UINT8 ) (UINTN) CpuAddr, (UINT8 ) (UINTN) DeviceAddr, NumBytes);\r
	352	break;\r
	353	\r
	354	case TO_DEVICE:\r
	355	CopyMem ((UINT8 ) (UINTN) DeviceAddr, (UINT8 ) (UINTN) CpuAddr, NumBytes);\r
	356	break;\r
	357	}\r
	358	\r
	359	return ;\r
	360	}\r