MdeModulePkg/Universal/Network/MnpDxe/MnpImpl.h

   1 /** @file
   2   Declaration of structures and functions of MnpDxe driver.
   3
   4 Copyright (c) 2005 - 2009, Intel Corporation. <BR>
   5 All rights reserved. This program and the accompanying materials
   6 are licensed and made available under the terms and conditions of the BSD License
   7 which accompanies this distribution.  The full text of the license may be found at
   8 http://opensource.org/licenses/bsd-license.php
   9
  10 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12
  13 **/
  14
  15 #ifndef _MNP_IMPL_H_
  16 #define _MNP_IMPL_H_
  17
  18 #include "MnpDriver.h"
  19
  20 #define NET_ETHER_FCS_SIZE            4
  21
  22 #define MNP_SYS_POLL_INTERVAL         (10 * TICKS_PER_MS)   // 10 milliseconds
  23 #define MNP_TIMEOUT_CHECK_INTERVAL    (50 * TICKS_PER_MS)   // 50 milliseconds
  24 #define MNP_TX_TIMEOUT_TIME           (500 * TICKS_PER_MS)  // 500 milliseconds
  25 #define MNP_INIT_NET_BUFFER_NUM       512
  26 #define MNP_NET_BUFFER_INCREASEMENT   64
  27 #define MNP_MAX_NET_BUFFER_NUM        65536
  28
  29 #define MNP_MAX_RCVD_PACKET_QUE_SIZE  256
  30
  31 #define MNP_RECEIVE_UNICAST           0x01
  32 #define MNP_RECEIVE_BROADCAST         0x02
  33
  34 #define UNICAST_PACKET                MNP_RECEIVE_UNICAST
  35 #define BROADCAST_PACKET              MNP_RECEIVE_BROADCAST
  36
  37 #define MNP_INSTANCE_DATA_SIGNATURE   SIGNATURE_32 ('M', 'n', 'p', 'I')
  38
  39 #define MNP_INSTANCE_DATA_FROM_THIS(a) \
  40   CR ( \
  41   (a), \
  42   MNP_INSTANCE_DATA, \
  43   ManagedNetwork, \
  44   MNP_INSTANCE_DATA_SIGNATURE \
  45   )
  46
  47 typedef struct {
  48   UINT32                          Signature;
  49
  50   MNP_SERVICE_DATA                *MnpServiceData;
  51
  52   EFI_HANDLE                      Handle;
  53
  54   LIST_ENTRY                      InstEntry;
  55
  56   EFI_MANAGED_NETWORK_PROTOCOL    ManagedNetwork;
  57
  58   BOOLEAN                         Configured;
  59   BOOLEAN                         Destroyed;
  60
  61   LIST_ENTRY                      GroupCtrlBlkList;
  62
  63   NET_MAP                         RxTokenMap;
  64
  65   LIST_ENTRY                      RxDeliveredPacketQueue;
  66   LIST_ENTRY                      RcvdPacketQueue;
  67   UINTN                           RcvdPacketQueueSize;
  68
  69   EFI_MANAGED_NETWORK_CONFIG_DATA ConfigData;
  70
  71   UINT8                           ReceiveFilter;
  72 } MNP_INSTANCE_DATA;
  73
  74 typedef struct {
  75   LIST_ENTRY      AddrEntry;
  76   EFI_MAC_ADDRESS Address;
  77   INTN            RefCnt;
  78 } MNP_GROUP_ADDRESS;
  79
  80 typedef struct {
  81   LIST_ENTRY        CtrlBlkEntry;
  82   MNP_GROUP_ADDRESS *GroupAddress;
  83 } MNP_GROUP_CONTROL_BLOCK;
  84
  85 typedef struct {
  86   LIST_ENTRY                        WrapEntry;
  87   MNP_INSTANCE_DATA                 *Instance;
  88   EFI_MANAGED_NETWORK_RECEIVE_DATA  RxData;
  89   NET_BUF                           *Nbuf;
  90   UINT64                            TimeoutTick;
  91 } MNP_RXDATA_WRAP;
  92
  93 /**
  94   Initialize the mnp service context data.
  95
  96   @param[in, out]  MnpServiceData     Pointer to the mnp service context data.
  97   @param[in]       ImageHandle        The driver image handle.
  98   @param[in]       ControllerHandle   Handle of device to bind driver to.
  99
 100   @retval EFI_SUCCESS           The mnp service context is initialized.
 101   @retval EFI_UNSUPPORTED       ControllerHandle does not support Simple Network Protocol.
 102   @retval Others                Other errors as indicated.
 103
 104 **/
 105 EFI_STATUS
 106 MnpInitializeServiceData (
 107   IN OUT MNP_SERVICE_DATA  *MnpServiceData,
 108   IN EFI_HANDLE            ImageHandle,
 109   IN EFI_HANDLE            ControllerHandle
 110   );
 111
 112 /**
 113   Flush the mnp service context data.
 114
 115   @param[in, out]  MnpServiceData    Pointer to the mnp service context data.
 116   @param[in]       ImageHandle       The driver image handle.
 117
 118 **/
 119 VOID
 120 MnpFlushServiceData (
 121   IN OUT MNP_SERVICE_DATA  *MnpServiceData,
 122   IN EFI_HANDLE            ImageHandle
 123   );
 124
 125 /**
 126   Initialize the mnp instance context data.
 127
 128   @param[in]       MnpServiceData   Pointer to the mnp service context data.
 129   @param[in, out]  Instance         Pointer to the mnp instance context data
 130                                     to initialize.
 131
 132 **/
 133 VOID
 134 MnpInitializeInstanceData (
 135   IN MNP_SERVICE_DATA       *MnpServiceData,
 136   IN OUT MNP_INSTANCE_DATA  *Instance
 137   );
 138
 139 /**
 140   Check whether the token specified by Arg matches the token in Item.
 141
 142   @param[in]  Map               Pointer to the NET_MAP.
 143   @param[in]  Item              Pointer to the NET_MAP_ITEM.
 144   @param[in]  Arg               Pointer to the Arg, it's a pointer to the token to
 145                                 check.
 146
 147   @retval EFI_SUCCESS           The token specified by Arg is different from the
 148                                 token in Item.
 149   @retval EFI_ACCESS_DENIED     The token specified by Arg is the same as that in
 150                                 Item.
 151
 152 **/
 153 EFI_STATUS
 154 MnpTokenExist (
 155   IN NET_MAP       *Map,
 156   IN NET_MAP_ITEM  *Item,
 157   IN VOID          *Arg
 158   );
 159
 160 /**
 161   Cancel the token specified by Arg if it matches the token in Item.
 162
 163   @param[in, out]  Map               Pointer to the NET_MAP.
 164   @param[in, out]  Item              Pointer to the NET_MAP_ITEM.
 165   @param[in]       Arg               Pointer to the Arg, it's a pointer to the
 166                                      token to cancel.
 167
 168   @retval EFI_SUCCESS       The Arg is NULL, and the token in Item is cancelled,
 169                             or the Arg isn't NULL, and the token in Item is
 170                             different from the Arg.
 171   @retval EFI_ABORTED       The Arg isn't NULL, the token in Item mathces the
 172                             Arg, and the token is cancelled.
 173
 174 **/
 175 EFI_STATUS
 176 MnpCancelTokens (
 177   IN OUT NET_MAP       *Map,
 178   IN OUT NET_MAP_ITEM  *Item,
 179   IN VOID              *Arg
 180   );
 181
 182 /**
 183   Flush the instance's received data.
 184
 185   @param[in, out]  Instance              Pointer to the mnp instance context data.
 186
 187 **/
 188 VOID
 189 MnpFlushRcvdDataQueue (
 190   IN OUT MNP_INSTANCE_DATA  *Instance
 191   );
 192
 193 /**
 194   Configure the Instance using ConfigData.
 195
 196   @param[in, out]  Instance     Pointer to the mnp instance context data.
 197   @param[in]       ConfigData   Pointer to the configuration data used to configure
 198                                 the isntance.
 199
 200   @retval EFI_SUCCESS           The Instance is configured.
 201   @retval EFI_UNSUPPORTED       EnableReceiveTimestamps is on and the
 202                                 implementation doesn't support it.
 203   @retval Others                Other errors as indicated.
 204
 205 **/
 206 EFI_STATUS
 207 MnpConfigureInstance (
 208   IN OUT MNP_INSTANCE_DATA              *Instance,
 209   IN EFI_MANAGED_NETWORK_CONFIG_DATA    *ConfigData OPTIONAL
 210   );
 211
 212 /**
 213   Do the group operations for this instance.
 214
 215   @param[in, out]  Instance        Pointer to the instance context data.
 216   @param[in]       JoinFlag        Set to TRUE to join a group. Set to TRUE to
 217                                    leave a group/groups.
 218   @param[in]       MacAddress      Pointer to the group address to join or leave.
 219   @param[in]       CtrlBlk         Pointer to the group control block if JoinFlag
 220                                    is FALSE.
 221
 222   @retval EFI_SUCCESS              The group operation finished.
 223   @retval EFI_OUT_OF_RESOURCES     Failed due to lack of memory resources.
 224   @retval Others                   Other errors as indicated.
 225
 226 **/
 227 EFI_STATUS
 228 MnpGroupOp (
 229   IN OUT MNP_INSTANCE_DATA    *Instance,
 230   IN BOOLEAN                  JoinFlag,
 231   IN EFI_MAC_ADDRESS          *MacAddress OPTIONAL,
 232   IN MNP_GROUP_CONTROL_BLOCK  *CtrlBlk OPTIONAL
 233   );
 234
 235 /**
 236   Validates the Mnp transmit token.
 237
 238   @param[in]  Instance            Pointer to the Mnp instance context data.
 239   @param[in]  Token               Pointer to the transmit token to check.
 240
 241   @return The Token is valid or not.
 242
 243 **/
 244 BOOLEAN
 245 MnpIsValidTxToken (
 246   IN MNP_INSTANCE_DATA                     *Instance,
 247   IN EFI_MANAGED_NETWORK_COMPLETION_TOKEN  *Token
 248   );
 249
 250 /**
 251   Build the packet to transmit from the TxData passed in.
 252
 253   @param[in]   MnpServiceData      Pointer to the mnp service context data.
 254   @param[in]   TxData              Pointer to the transmit data containing the information
 255                                    to build the packet.
 256   @param[out]  PktBuf              Pointer to record the address of the packet.
 257   @param[out]  PktLen              Pointer to a UINT32 variable used to record the packet's
 258                                    length.
 259
 260 **/
 261 VOID
 262 MnpBuildTxPacket (
 263   IN  MNP_SERVICE_DATA                   *MnpServiceData,
 264   IN  EFI_MANAGED_NETWORK_TRANSMIT_DATA  *TxData,
 265   OUT UINT8                              **PktBuf,
 266   OUT UINT32                             *PktLen
 267   );
 268
 269 /**
 270   Synchronously send out the packet.
 271
 272   @param[in]       MnpServiceData      Pointer to the mnp service context data.
 273   @param[in]       Packet              Pointer to the pakcet buffer.
 274   @param[in]       Length              The length of the packet.
 275   @param[in, out]  Token               Pointer to the token the packet generated from.
 276
 277   @retval EFI_SUCCESS                  The packet is sent out.
 278   @retval EFI_TIMEOUT                  Time out occurs, the packet isn't sent.
 279   @retval EFI_DEVICE_ERROR             An unexpected network error occurs.
 280
 281 **/
 282 EFI_STATUS
 283 MnpSyncSendPacket (
 284   IN MNP_SERVICE_DATA                          *MnpServiceData,
 285   IN UINT8                                     *Packet,
 286   IN UINT32                                    Length,
 287   IN OUT EFI_MANAGED_NETWORK_COMPLETION_TOKEN  *Token
 288   );
 289
 290 /**
 291   Try to deliver the received packet to the instance.
 292
 293   @param[in, out]  Instance     Pointer to the mnp instance context data.
 294
 295   @retval EFI_SUCCESS           The received packet is delivered, or there is no
 296                                 packet to deliver, or there is no available receive
 297                                 token.
 298   @retval EFI_OUT_OF_RESOURCES  The deliver fails due to lack of memory resource.
 299
 300 **/
 301 EFI_STATUS
 302 MnpInstanceDeliverPacket (
 303   IN OUT MNP_INSTANCE_DATA  *Instance
 304   );
 305
 306 /**
 307   Recycle the RxData and other resources used to hold and deliver the received
 308   packet.
 309
 310   @param[in]  Event               The event this notify function registered to.
 311   @param[in]  Context             Pointer to the context data registerd to the Event.
 312
 313 **/
 314 VOID
 315 EFIAPI
 316 MnpRecycleRxData (
 317   IN EFI_EVENT  Event,
 318   IN VOID       *Context
 319   );
 320
 321 /**
 322   Try to receive a packet and deliver it.
 323
 324   @param[in, out]  MnpServiceData        Pointer to the mnp service context data.
 325
 326   @retval EFI_SUCCESS           add return value to function comment
 327   @retval EFI_NOT_STARTED       The simple network protocol is not started.
 328   @retval EFI_NOT_READY         No packet received.
 329   @retval EFI_DEVICE_ERROR      An unexpected error occurs.
 330
 331 **/
 332 EFI_STATUS
 333 MnpReceivePacket (
 334   IN OUT MNP_SERVICE_DATA  *MnpServiceData
 335   );
 336
 337 /**
 338   Allocate a free NET_BUF from MnpServiceData->FreeNbufQue. If there is none
 339   in the queue, first try to allocate some and add them into the queue, then
 340   fetch the NET_BUF from the updated FreeNbufQue.
 341
 342   @param[in, out]  MnpServiceData        Pointer to the MNP_SERVICE_DATA.
 343
 344   @return     Pointer to the allocated free NET_BUF structure, if NULL the
 345               operation is failed.
 346
 347 **/
 348 NET_BUF *
 349 MnpAllocNbuf (
 350   IN OUT MNP_SERVICE_DATA  *MnpServiceData
 351   );
 352
 353 /**
 354   Try to reclaim the Nbuf into the buffer pool.
 355
 356   @param[in, out]  MnpServiceData        Pointer to the mnp service context data.
 357   @param[in, out]  Nbuf                  Pointer to the NET_BUF to free.
 358
 359 **/
 360 VOID
 361 MnpFreeNbuf (
 362   IN OUT MNP_SERVICE_DATA  *MnpServiceData,
 363   IN OUT NET_BUF           *Nbuf
 364   );
 365
 366 /**
 367   Remove the received packets if timeout occurs.
 368
 369   @param[in]  Event             The event this notify function registered to.
 370   @param[in]  Context           Pointer to the context data registered to the
 371                                 event.
 372
 373 **/
 374 VOID
 375 EFIAPI
 376 MnpCheckPacketTimeout (
 377   IN EFI_EVENT  Event,
 378   IN VOID       *Context
 379   );
 380
 381 /**
 382   Poll to receive the packets from Snp. This function is either called by upperlayer
 383   protocols/applications or the system poll timer notify mechanism.
 384
 385   @param[in]       Event        The event this notify function registered to.
 386   @param[in, out]  Context      Pointer to the context data registered to the event.
 387
 388 **/
 389 VOID
 390 EFIAPI
 391 MnpSystemPoll (
 392   IN EFI_EVENT  Event,
 393   IN OUT VOID   *Context
 394   );
 395
 396 /**
 397   Returns the operational parameters for the current MNP child driver. May also
 398   support returning the underlying SNP driver mode data.
 399
 400   The GetModeData() function is used to read the current mode data (operational
 401   parameters) from the MNP or the underlying SNP.
 402
 403   @param[in]  This          Pointer to the EFI_MANAGED_NETWORK_PROTOCOL instance.
 404   @param[out] MnpConfigData Pointer to storage for MNP operational parameters. Type
 405                             EFI_MANAGED_NETWORK_CONFIG_DATA is defined in "Related
 406                             Definitions" below.
 407   @param[out] SnpModeData   Pointer to storage for SNP operational parameters. This
 408                             feature may be unsupported. Type EFI_SIMPLE_NETWORK_MODE
 409                             is defined in the EFI_SIMPLE_NETWORK_PROTOCOL.
 410
 411   @retval EFI_SUCCESS           The operation completed successfully.
 412   @retval EFI_INVALID_PARAMETER This is NULL.
 413   @retval EFI_UNSUPPORTED       The requested feature is unsupported in this
 414                                 MNP implementation.
 415   @retval EFI_NOT_STARTED       This MNP child driver instance has not been
 416                                 configured. The default values are returned in
 417                                 MnpConfigData if it is not NULL.
 418   @retval Others                The mode data could not be read.
 419
 420 **/
 421 EFI_STATUS
 422 EFIAPI
 423 MnpGetModeData (
 424   IN  EFI_MANAGED_NETWORK_PROTOCOL     *This,
 425   OUT EFI_MANAGED_NETWORK_CONFIG_DATA  *MnpConfigData, OPTIONAL
 426   OUT EFI_SIMPLE_NETWORK_MODE          *SnpModeData    OPTIONAL
 427   );
 428
 429 /**
 430   Sets or clears the operational parameters for the MNP child driver.
 431
 432   The Configure() function is used to set, change, or reset the operational
 433   parameters for the MNP child driver instance. Until the operational parameters
 434   have been set, no network traffic can be sent or received by this MNP child
 435   driver instance. Once the operational parameters have been reset, no more
 436   traffic can be sent or received until the operational parameters have been set
 437   again.
 438   Each MNP child driver instance can be started and stopped independently of
 439   each other by setting or resetting their receive filter settings with the
 440   Configure() function.
 441   After any successful call to Configure(), the MNP child driver instance is
 442   started. The internal periodic timer (if supported) is enabled. Data can be
 443   transmitted and may be received if the receive filters have also been enabled.
 444   Note: If multiple MNP child driver instances will receive the same packet
 445   because of overlapping receive filter settings, then the first MNP child
 446   driver instance will receive the original packet and additional instances will
 447   receive copies of the original packet.
 448   Note: Warning: Receive filter settings that overlap will consume extra
 449   processor and/or DMA resources and degrade system and network performance.
 450
 451   @param[in]  This           Pointer to the EFI_MANAGED_NETWORK_PROTOCOL instance.
 452   @param[in]  MnpConfigData  Pointer to configuration data that will be assigned
 453                              to the MNP child driver instance. If NULL, the MNP
 454                              child driver instance is reset to startup defaults
 455                              and all pending transmit and receive requests are
 456                              flushed. Type EFI_MANAGED_NETWORK_CONFIG_DATA is
 457                              defined in EFI_MANAGED_NETWORK_PROTOCOL.GetModeData().
 458
 459   @retval EFI_SUCCESS            The operation completed successfully.
 460   @retval EFI_INVALID_PARAMETER  One or more of the following conditions is
 461                                  TRUE:
 462                                  * This is NULL.
 463                                  * MnpConfigData.ProtocolTypeFilter is not
 464                                    valid.
 465                                  The operational data for the MNP child driver
 466                                  instance is unchanged.
 467   @retval EFI_OUT_OF_RESOURCES   Required system resources (usually memory)
 468                                  could not be allocated.
 469                                  The MNP child driver instance has been reset to
 470                                  startup defaults.
 471   @retval EFI_UNSUPPORTED        The requested feature is unsupported in
 472                                  this [MNP] implementation. The operational data
 473                                  for the MNP child driver instance is unchanged.
 474   @retval EFI_DEVICE_ERROR       An unexpected network or system error
 475                                  occurred. The MNP child driver instance has
 476                                  been reset to startup defaults.
 477   @retval Others                 The MNP child driver instance has been reset to
 478                                  startup defaults.
 479
 480 **/
 481 EFI_STATUS
 482 EFIAPI
 483 MnpConfigure (
 484   IN EFI_MANAGED_NETWORK_PROTOCOL     *This,
 485   IN EFI_MANAGED_NETWORK_CONFIG_DATA  *MnpConfigData OPTIONAL
 486   );
 487
 488 /**
 489   Translates an IP multicast address to a hardware (MAC) multicast address. This
 490   function may be unsupported in some MNP implementations.
 491
 492   The McastIpToMac() function translates an IP multicast address to a hardware
 493   (MAC) multicast address. This function may be implemented by calling the
 494   underlying EFI_SIMPLE_NETWORK. MCastIpToMac() function, which may also be
 495   unsupported in some MNP implementations.
 496
 497   @param[in]  This        Pointer to the EFI_MANAGED_NETWORK_PROTOCOL instance.
 498   @param[in]  Ipv6Flag    Set to TRUE to if IpAddress is an IPv6 multicast address.
 499                           Set to FALSE if IpAddress is an IPv4 multicast address.
 500   @param[in]  IpAddress   Pointer to the multicast IP address (in network byte
 501                           order) to convert.
 502   @param[out] MacAddress  Pointer to the resulting multicast MAC address.
 503
 504   @retval EFI_SUCCESS           The operation completed successfully.
 505   @retval EFI_INVALID_PARAMETER One of the following conditions is TRUE:
 506                                  * This is NULL.
 507                                  * IpAddress is NULL.
 508                                  * IpAddress is not a valid multicast IP
 509                                    address.
 510                                  * MacAddress is NULL.
 511   @retval EFI_NOT_STARTED       This MNP child driver instance has not been
 512                                 configured.
 513   @retval EFI_UNSUPPORTED       The requested feature is unsupported in this
 514                                 MNP implementation.
 515   @retval EFI_DEVICE_ERROR      An unexpected network or system error occurred.
 516   @retval Others                The address could not be converted.
 517 **/
 518 EFI_STATUS
 519 EFIAPI
 520 MnpMcastIpToMac (
 521   IN  EFI_MANAGED_NETWORK_PROTOCOL  *This,
 522   IN  BOOLEAN                       Ipv6Flag,
 523   IN  EFI_IP_ADDRESS                *IpAddress,
 524   OUT EFI_MAC_ADDRESS               *MacAddress
 525   );
 526
 527 /**
 528   Enables and disables receive filters for multicast address. This function may
 529   be unsupported in some MNP implementations.
 530
 531   The Groups() function only adds and removes multicast MAC addresses from the
 532   filter list. The MNP driver does not transmit or process Internet Group
 533   Management Protocol (IGMP) packets. If JoinFlag is FALSE and MacAddress is
 534   NULL, then all joined groups are left.
 535
 536   @param[in]  This        Pointer to the EFI_MANAGED_NETWORK_PROTOCOL instance.
 537   @param[in]  JoinFlag    Set to TRUE to join this multicast group.
 538                           Set to FALSE to leave this multicast group.
 539   @param[in]  MacAddress  Pointer to the multicast MAC group (address) to join or
 540                           leave.
 541
 542   @retval EFI_SUCCESS           The requested operation completed successfully.
 543   @retval EFI_INVALID_PARAMETER One or more of the following conditions is TRUE:
 544                                 * This is NULL.
 545                                 * JoinFlag is TRUE and MacAddress is NULL.
 546                                 * MacAddress is not a valid multicast MAC
 547                                   address.
 548                                 * The MNP multicast group settings are
 549                                   unchanged.
 550   @retval EFI_NOT_STARTED       This MNP child driver instance has not been
 551                                 configured.
 552   @retval EFI_ALREADY_STARTED   The supplied multicast group is already joined.
 553   @retval EFI_NOT_FOUND         The supplied multicast group is not joined.
 554   @retval EFI_DEVICE_ERROR      An unexpected network or system error occurred.
 555                                 The MNP child driver instance has been reset to
 556                                 startup defaults.
 557   @retval EFI_UNSUPPORTED       The requested feature is unsupported in this MNP
 558                                 implementation.
 559   @retval Others                The requested operation could not be completed.
 560                                 The MNP multicast group settings are unchanged.
 561
 562 **/
 563 EFI_STATUS
 564 EFIAPI
 565 MnpGroups (
 566   IN EFI_MANAGED_NETWORK_PROTOCOL  *This,
 567   IN BOOLEAN                       JoinFlag,
 568   IN EFI_MAC_ADDRESS               *MacAddress OPTIONAL
 569   );
 570
 571 /**
 572   Places asynchronous outgoing data packets into the transmit queue.
 573
 574   The Transmit() function places a completion token into the transmit packet
 575   queue. This function is always asynchronous.
 576   The caller must fill in the Token.Event and Token.TxData fields in the
 577   completion token, and these fields cannot be NULL. When the transmit operation
 578   completes, the MNP updates the Token.Status field and the Token.Event is
 579   signaled.
 580   Note: There may be a performance penalty if the packet needs to be
 581   defragmented before it can be transmitted by the network device. Systems in
 582   which performance is critical should review the requirements and features of
 583   the underlying communications device and drivers.
 584
 585
 586   @param[in]  This    Pointer to the EFI_MANAGED_NETWORK_PROTOCOL instance.
 587   @param[in]  Token   Pointer to a token associated with the transmit data
 588                       descriptor. Type EFI_MANAGED_NETWORK_COMPLETION_TOKEN
 589                                           is defined in "Related Definitions" below.
 590
 591   @retval EFI_SUCCESS            The transmit completion token was cached.
 592   @retval EFI_NOT_STARTED        This MNP child driver instance has not been
 593                                  configured.
 594   @retval EFI_INVALID_PARAMETER  One or more of the following conditions is
 595                                  TRUE:
 596                                  * This is NULL.
 597                                  * Token is NULL.
 598                                  * Token.Event is NULL.
 599                                  * Token.TxData is NULL.
 600                                  * Token.TxData.DestinationAddress is not
 601                                    NULL and Token.TxData.HeaderLength is zero.
 602                                  * Token.TxData.FragmentCount is zero.
 603                                  * (Token.TxData.HeaderLength +
 604                                    Token.TxData.DataLength) is not equal to the
 605                                    sum of the
 606                                    Token.TxData.FragmentTable[].FragmentLength
 607                                    fields.
 608                                  * One or more of the
 609                                    Token.TxData.FragmentTable[].FragmentLength
 610                                    fields is zero.
 611                                  * One or more of the
 612                                    Token.TxData.FragmentTable[].FragmentBufferfields
 613                                    is NULL.
 614                                  * Token.TxData.DataLength is greater than MTU.
 615   @retval EFI_ACCESS_DENIED      The transmit completion token is already in the
 616                                  transmit queue.
 617   @retval EFI_OUT_OF_RESOURCES   The transmit data could not be queued due to a
 618                                  lack of system resources (usually memory).
 619   @retval EFI_DEVICE_ERROR       An unexpected system or network error occurred.
 620                                  The MNP child driver instance has been reset to
 621                                  startup defaults.
 622   @retval EFI_NOT_READY          The transmit request could not be queued because
 623                                  the transmit queue is full.
 624
 625 **/
 626 EFI_STATUS
 627 EFIAPI
 628 MnpTransmit (
 629   IN EFI_MANAGED_NETWORK_PROTOCOL          *This,
 630   IN EFI_MANAGED_NETWORK_COMPLETION_TOKEN  *Token
 631   );
 632
 633 /**
 634   Aborts an asynchronous transmit or receive request.
 635
 636   The Cancel() function is used to abort a pending transmit or receive request.
 637   If the token is in the transmit or receive request queues, after calling this
 638   function, Token.Status will be set to EFI_ABORTED and then Token.Event will be
 639   signaled. If the token is not in one of the queues, which usually means that
 640   the asynchronous operation has completed, this function will not signal the
 641   token and EFI_NOT_FOUND is returned.
 642
 643   @param[in]  This     Pointer to the EFI_MANAGED_NETWORK_PROTOCOL instance.
 644   @param[in]  Token    Pointer to a token that has been issued by
 645                        EFI_MANAGED_NETWORK_PROTOCOL.Transmit() or
 646                        EFI_MANAGED_NETWORK_PROTOCOL.Receive(). If NULL, all
 647                                            pending tokens are aborted.
 648
 649   @retval EFI_SUCCESS            The asynchronous I/O request was aborted and
 650                                  Token.Event was signaled. When Token is NULL,
 651                                  all pending requests were aborted and their
 652                                  events were signaled.
 653   @retval EFI_NOT_STARTED        This MNP child driver instance has not been
 654                                  configured.
 655   @retval EFI_INVALID_PARAMETER  This is NULL.
 656   @retval EFI_NOT_FOUND          When Token is not NULL, the asynchronous I/O
 657                                  request was not found in the transmit or
 658                                  receive queue. It has either completed or was
 659                                  not issued by Transmit() and Receive().
 660
 661 **/
 662 EFI_STATUS
 663 EFIAPI
 664 MnpCancel (
 665   IN EFI_MANAGED_NETWORK_PROTOCOL          *This,
 666   IN EFI_MANAGED_NETWORK_COMPLETION_TOKEN  *Token OPTIONAL
 667   );
 668
 669 /**
 670   Places an asynchronous receiving request into the receiving queue.
 671
 672   The Receive() function places a completion token into the receive packet
 673   queue. This function is always asynchronous.
 674   The caller must fill in the Token.Event field in the completion token, and
 675   this field cannot be NULL. When the receive operation completes, the MNP
 676   updates the Token.Status and Token.RxData fields and the Token.Event is
 677   signaled.
 678
 679   @param[in]  This      Pointer to the EFI_MANAGED_NETWORK_PROTOCOL instance.
 680   @param[in]  Token     Pointer to a token associated with the receive
 681                         data descriptor. Type
 682                         EFI_MANAGED_NETWORK_COMPLETION_TOKEN is defined in
 683                         EFI_MANAGED_NETWORK_PROTOCOL.Transmit().
 684
 685   @retval EFI_SUCCESS            The receive completion token was cached.
 686   @retval EFI_NOT_STARTED        This MNP child driver instance has not been
 687                                  configured.
 688   @retval EFI_INVALID_PARAMETER  One or more of the following conditions is
 689                                  TRUE:
 690                                  * This is NULL.
 691                                  * Token is NULL.
 692                                  * Token.Event is NULL
 693   @retval EFI_OUT_OF_RESOURCES   The transmit data could not be queued due to a
 694                                  lack of system resources (usually memory).
 695   @retval EFI_DEVICE_ERROR       An unexpected system or network error occurred.
 696                                  The MNP child driver instance has been reset to
 697                                  startup defaults.
 698   @retval EFI_ACCESS_DENIED      The receive completion token was already in the
 699                                  receive queue.
 700   @retval EFI_NOT_READY          The receive request could not be queued because
 701                                  the receive queue is full.
 702
 703 **/
 704 EFI_STATUS
 705 EFIAPI
 706 MnpReceive (
 707   IN EFI_MANAGED_NETWORK_PROTOCOL          *This,
 708   IN EFI_MANAGED_NETWORK_COMPLETION_TOKEN  *Token
 709   );
 710
 711 /**
 712   Polls for incoming data packets and processes outgoing data packets.
 713
 714   The Poll() function can be used by network drivers and applications to
 715   increase the rate that data packets are moved between the communications
 716   device and the transmit and receive queues.
 717   Normally, a periodic timer event internally calls the Poll() function. But, in
 718   some systems, the periodic timer event may not call Poll() fast enough to
 719   transmit and/or receive all data packets without missing packets. Drivers and
 720   applications that are experiencing packet loss should try calling the Poll()
 721   function more often.
 722
 723   @param[in]  This         Pointer to the EFI_MANAGED_NETWORK_PROTOCOL instance.
 724
 725   @retval EFI_SUCCESS      Incoming or outgoing data was processed.
 726   @retval EFI_NOT_STARTED  This MNP child driver instance has not been
 727                            configured.
 728   @retval EFI_DEVICE_ERROR An unexpected system or network error occurred. The
 729                            MNP child driver instance has been reset to startup
 730                            defaults.
 731   @retval EFI_NOT_READY    No incoming or outgoing data was processed. Consider
 732                            increasing the polling rate.
 733   @retval EFI_TIMEOUT      Data was dropped out of the transmit and/or receive
 734                            queue. Consider increasing the polling rate.
 735
 736 **/
 737 EFI_STATUS
 738 EFIAPI
 739 MnpPoll (
 740   IN EFI_MANAGED_NETWORK_PROTOCOL  *This
 741   );
 742
 743 /**
 744   Configure the Snp receive filters according to the instances' receive filter
 745   settings.
 746
 747   @param[in]  MnpServiceData        Pointer to the mnp service context data.
 748
 749   @retval     EFI_SUCCESS           The receive filters is configured.
 750   @retval     EFI_OUT_OF_RESOURCES  The receive filters can't be configured due
 751                                     to lack of memory resource.
 752
 753 **/
 754 EFI_STATUS
 755 MnpConfigReceiveFilters (
 756   IN MNP_SERVICE_DATA  *MnpServiceData
 757   );
 758
 759 #endif