MdeModulePkg/Universal/ReportStatusCodeRouter/RuntimeDxe/ReportStatusCodeRouterRuntimeDxe.h

   1 /** @file
   2   Internal include file for Report Status Code Router Driver.
   3
   4   Copyright (c) 2009 - 2018, Intel Corporation. All rights reserved.<BR>
   5   SPDX-License-Identifier: BSD-2-Clause-Patent
   6
   7 **/
   8
   9 #ifndef __REPORT_STATUS_CODE_ROUTER_RUNTIME_DXE_H__
  10 #define __REPORT_STATUS_CODE_ROUTER_RUNTIME_DXE_H__
  11
  12 #include <Protocol/ReportStatusCodeHandler.h>
  13 #include <Protocol/StatusCode.h>
  14
  15 #include <Guid/EventGroup.h>
  16
  17 #include <Library/BaseLib.h>
  18 #include <Library/SynchronizationLib.h>
  19 #include <Library/DebugLib.h>
  20 #include <Library/HobLib.h>
  21 #include <Library/UefiDriverEntryPoint.h>
  22 #include <Library/UefiBootServicesTableLib.h>
  23 #include <Library/MemoryAllocationLib.h>
  24 #include <Library/BaseMemoryLib.h>
  25 #include <Library/UefiRuntimeLib.h>
  26 #include "Library/UefiLib.h"
  27
  28 #define RSC_HANDLER_CALLBACK_ENTRY_SIGNATURE  SIGNATURE_32 ('r', 'h', 'c', 'e')
  29
  30 typedef struct {
  31   UINTN                       Signature;
  32   EFI_RSC_HANDLER_CALLBACK    RscHandlerCallback;
  33   EFI_TPL                     Tpl;
  34   EFI_EVENT                   Event;
  35   EFI_PHYSICAL_ADDRESS        StatusCodeDataBuffer;
  36   UINTN                       BufferSize;
  37   EFI_PHYSICAL_ADDRESS        EndPointer;
  38   LIST_ENTRY                  Node;
  39 } RSC_HANDLER_CALLBACK_ENTRY;
  40
  41 typedef struct {
  42   EFI_STATUS_CODE_TYPE     Type;
  43   EFI_STATUS_CODE_VALUE    Value;
  44   UINT32                   Instance;
  45   UINT32                   Reserved;
  46   EFI_GUID                 CallerId;
  47   EFI_STATUS_CODE_DATA     Data;
  48 } RSC_DATA_ENTRY;
  49
  50 /**
  51   Register the callback function for ReportStatusCode() notification.
  52
  53   When this function is called the function pointer is added to an internal list and any future calls to
  54   ReportStatusCode() will be forwarded to the Callback function. During the bootservices,
  55   this is the callback for which this service can be invoked. The report status code router
  56   will create an event such that the callback function is only invoked at the TPL for which it was
  57   registered. The entity that registers for the callback should also register for an event upon
  58   generation of exit boot services and invoke the unregister service.
  59   If the handler does not have a TPL dependency, it should register for a callback at TPL high. The
  60   router infrastructure will support making callbacks at runtime, but the caller for runtime invocation
  61   must meet the following criteria:
  62   1. must be a runtime driver type so that its memory is not reclaimed
  63   2. not unregister at exit boot services so that the router will still have its callback address
  64   3. the caller must be self-contained (eg. Not call out into any boot-service interfaces) and be
  65   runtime safe, in general.
  66
  67   @param[in] Callback   A pointer to a function of type EFI_RSC_HANDLER_CALLBACK that is called when
  68                         a call to ReportStatusCode() occurs.
  69   @param[in] Tpl        TPL at which callback can be safely invoked.
  70
  71   @retval  EFI_SUCCESS              Function was successfully registered.
  72   @retval  EFI_INVALID_PARAMETER    The callback function was NULL.
  73   @retval  EFI_OUT_OF_RESOURCES     The internal buffer ran out of space. No more functions can be
  74                                     registered.
  75   @retval  EFI_ALREADY_STARTED      The function was already registered. It can't be registered again.
  76
  77 **/
  78 EFI_STATUS
  79 EFIAPI
  80 Register (
  81   IN EFI_RSC_HANDLER_CALLBACK  Callback,
  82   IN EFI_TPL                   Tpl
  83   );
  84
  85 /**
  86   Remove a previously registered callback function from the notification list.
  87
  88   A callback function must be unregistered before it is deallocated. It is important that any registered
  89   callbacks that are not runtime complaint be unregistered when ExitBootServices() is called.
  90
  91   @param[in]  Callback  A pointer to a function of type EFI_RSC_HANDLER_CALLBACK that is to be
  92                         unregistered.
  93
  94   @retval EFI_SUCCESS           The function was successfully unregistered.
  95   @retval EFI_INVALID_PARAMETER The callback function was NULL.
  96   @retval EFI_NOT_FOUND         The callback function was not found to be unregistered.
  97
  98 **/
  99 EFI_STATUS
 100 EFIAPI
 101 Unregister (
 102   IN EFI_RSC_HANDLER_CALLBACK  Callback
 103   );
 104
 105 /**
 106   Provides an interface that a software module can call to report a status code.
 107
 108   @param  Type             Indicates the type of status code being reported.
 109   @param  Value            Describes the current status of a hardware or software entity.
 110                            This included information about the class and subclass that is used to
 111                            classify the entity as well as an operation.
 112   @param  Instance         The enumeration of a hardware or software entity within
 113                            the system. Valid instance numbers start with 1.
 114   @param  CallerId         This optional parameter may be used to identify the caller.
 115                            This parameter allows the status code driver to apply different rules to
 116                            different callers.
 117   @param  Data             This optional parameter may be used to pass additional data.
 118
 119   @retval EFI_SUCCESS           The function completed successfully
 120   @retval EFI_DEVICE_ERROR      The function should not be completed due to a device error.
 121
 122 **/
 123 EFI_STATUS
 124 EFIAPI
 125 ReportDispatcher (
 126   IN EFI_STATUS_CODE_TYPE   Type,
 127   IN EFI_STATUS_CODE_VALUE  Value,
 128   IN UINT32                 Instance,
 129   IN EFI_GUID               *CallerId  OPTIONAL,
 130   IN EFI_STATUS_CODE_DATA   *Data      OPTIONAL
 131   );
 132
 133 #endif