MdeModulePkg/Library/PeiPerformanceLib/PeiPerformanceLib.c

   1 /** @file
   2   Performance library instance used in PEI phase.
   3
   4   This file implements all APIs in Performance Library class in MdePkg. It creates
   5   performance logging GUIDed HOB on the first performance logging and then logs the
   6   performance data to the GUIDed HOB. Due to the limitation of temporary RAM, the maximum
   7   number of performance logging entry is specified by PcdMaxPeiPerformanceLogEntries.
   8
   9 Copyright (c) 2006 - 2012, Intel Corporation. All rights reserved.<BR>
  10 This program and the accompanying materials
  11 are licensed and made available under the terms and conditions of the BSD License
  12 which accompanies this distribution.  The full text of the license may be found at
  13 http://opensource.org/licenses/bsd-license.php
  14
  15 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  16 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  17
  18 **/
  19
  20
  21 #include <PiPei.h>
  22
  23 #include <Guid/Performance.h>
  24
  25 #include <Library/PerformanceLib.h>
  26 #include <Library/DebugLib.h>
  27 #include <Library/HobLib.h>
  28 #include <Library/BaseLib.h>
  29 #include <Library/TimerLib.h>
  30 #include <Library/PcdLib.h>
  31 #include <Library/BaseMemoryLib.h>
  32
  33
  34 /**
  35   Gets PEI the GUID HOB for PEI performance.
  36
  37   This internal function searches for the GUID HOB for PEI performance.
  38   If that GUID HOB is not found, it will build a new one.
  39   It returns the data area of that GUID HOB to record performance log.
  40
  41   @param  Handle                  Pointer to environment specific context used
  42                                   to identify the component being measured.
  43   @param  Token                   Pointer to a Null-terminated ASCII string
  44                                   that identifies the component being measured.
  45   @param  Module                  Pointer to a Null-terminated ASCII string
  46                                   that identifies the module being measured.
  47
  48   @retval The index of log entry in the array.
  49
  50 **/
  51 PEI_PERFORMANCE_LOG_HEADER *
  52 InternalGetPerformanceHobLog (
  53   VOID
  54   )
  55 {
  56   EFI_HOB_GUID_TYPE           *GuidHob;
  57   PEI_PERFORMANCE_LOG_HEADER  *PeiPerformanceLog;
  58   UINTN                       PeiPerformanceLogSize;
  59
  60   GuidHob = GetFirstGuidHob (&gPerformanceProtocolGuid);
  61
  62   if (GuidHob != NULL) {
  63     //
  64     // PEI Performance HOB was found, then return the existing one.
  65     //
  66     PeiPerformanceLog = GET_GUID_HOB_DATA (GuidHob);
  67   } else {
  68     //
  69     // PEI Performance HOB was not found, then build one.
  70     //
  71     PeiPerformanceLogSize = sizeof (PEI_PERFORMANCE_LOG_HEADER) +
  72                             sizeof (PEI_PERFORMANCE_LOG_ENTRY) * PcdGet8 (PcdMaxPeiPerformanceLogEntries);
  73     PeiPerformanceLog     = BuildGuidHob (&gPerformanceProtocolGuid, PeiPerformanceLogSize);
  74     PeiPerformanceLog     = ZeroMem (PeiPerformanceLog, PeiPerformanceLogSize);
  75   }
  76
  77   return PeiPerformanceLog;
  78 }
  79
  80 /**
  81   Searches in the log array with keyword Handle, Token and Module.
  82
  83   This internal function searches for the log entry in the log array.
  84   If there is an entry that exactly matches the given key word triple
  85   and its end time stamp is zero, then the index of that log entry is returned;
  86   otherwise, the the number of log entries in the array is returned.
  87
  88   @param  PeiPerformanceLog       Pointer to the data structure containing PEI
  89                                   performance data.
  90   @param  Handle                  Pointer to environment specific context used
  91                                   to identify the component being measured.
  92   @param  Token                   Pointer to a Null-terminated ASCII string
  93                                   that identifies the component being measured.
  94   @param  Module                  Pointer to a Null-terminated ASCII string
  95                                   that identifies the module being measured.
  96
  97   @retval The index of log entry in the array.
  98
  99 **/
 100 UINT32
 101 InternalSearchForLogEntry (
 102   IN PEI_PERFORMANCE_LOG_HEADER *PeiPerformanceLog,
 103   IN CONST VOID                 *Handle,  OPTIONAL
 104   IN CONST CHAR8                *Token,   OPTIONAL
 105   IN CONST CHAR8                *Module   OPTIONAL
 106   )
 107 {
 108   UINT32                    Index;
 109   UINT32                    NumberOfEntries;
 110   PEI_PERFORMANCE_LOG_ENTRY *LogEntryArray;
 111
 112
 113   if (Token == NULL) {
 114     Token = "";
 115   }
 116   if (Module == NULL) {
 117     Module = "";
 118   }
 119   NumberOfEntries = PeiPerformanceLog->NumberOfEntries;
 120   LogEntryArray   = (PEI_PERFORMANCE_LOG_ENTRY *) (PeiPerformanceLog + 1);
 121
 122   for (Index = 0; Index < NumberOfEntries; Index++) {
 123     if ((LogEntryArray[Index].Handle == (EFI_PHYSICAL_ADDRESS) (UINTN) Handle) &&
 124          AsciiStrnCmp (LogEntryArray[Index].Token, Token, PEI_PERFORMANCE_STRING_LENGTH) == 0 &&
 125          AsciiStrnCmp (LogEntryArray[Index].Module, Module, PEI_PERFORMANCE_STRING_LENGTH) == 0 &&
 126          LogEntryArray[Index].EndTimeStamp == 0
 127        ) {
 128       break;
 129     }
 130   }
 131   return Index;
 132 }
 133
 134 /**
 135   Creates a record for the beginning of a performance measurement.
 136
 137   Creates a record that contains the Handle, Token, and Module.
 138   If TimeStamp is not zero, then TimeStamp is added to the record as the start time.
 139   If TimeStamp is zero, then this function reads the current time stamp
 140   and adds that time stamp value to the record as the start time.
 141
 142   @param  Handle                  Pointer to environment specific context used
 143                                   to identify the component being measured.
 144   @param  Token                   Pointer to a Null-terminated ASCII string
 145                                   that identifies the component being measured.
 146   @param  Module                  Pointer to a Null-terminated ASCII string
 147                                   that identifies the module being measured.
 148   @param  TimeStamp               64-bit time stamp.
 149
 150   @retval RETURN_SUCCESS          The start of the measurement was recorded.
 151   @retval RETURN_OUT_OF_RESOURCES There are not enough resources to record the measurement.
 152
 153 **/
 154 RETURN_STATUS
 155 EFIAPI
 156 StartPerformanceMeasurement (
 157   IN CONST VOID   *Handle,  OPTIONAL
 158   IN CONST CHAR8  *Token,   OPTIONAL
 159   IN CONST CHAR8  *Module,  OPTIONAL
 160   IN UINT64       TimeStamp
 161   )
 162 {
 163   PEI_PERFORMANCE_LOG_HEADER  *PeiPerformanceLog;
 164   PEI_PERFORMANCE_LOG_ENTRY   *LogEntryArray;
 165   UINT32                      Index;
 166
 167   PeiPerformanceLog = InternalGetPerformanceHobLog ();
 168
 169   if (PeiPerformanceLog->NumberOfEntries >= PcdGet8 (PcdMaxPeiPerformanceLogEntries)) {
 170     return RETURN_OUT_OF_RESOURCES;
 171   }
 172   Index                       = PeiPerformanceLog->NumberOfEntries++;
 173   LogEntryArray               = (PEI_PERFORMANCE_LOG_ENTRY *) (PeiPerformanceLog + 1);
 174   LogEntryArray[Index].Handle = (EFI_PHYSICAL_ADDRESS) (UINTN) Handle;
 175
 176   if (Token != NULL) {
 177     AsciiStrnCpy (LogEntryArray[Index].Token, Token, PEI_PERFORMANCE_STRING_LENGTH);
 178   }
 179   if (Module != NULL) {
 180     AsciiStrnCpy (LogEntryArray[Index].Module, Module, PEI_PERFORMANCE_STRING_LENGTH);
 181   }
 182
 183   if (TimeStamp == 0) {
 184     TimeStamp = GetPerformanceCounter ();
 185   }
 186   LogEntryArray[Index].StartTimeStamp = TimeStamp;
 187
 188   return RETURN_SUCCESS;
 189 }
 190
 191 /**
 192   Fills in the end time of a performance measurement.
 193
 194   Looks up the record that matches Handle, Token, and Module.
 195   If the record can not be found then return RETURN_NOT_FOUND.
 196   If the record is found and TimeStamp is not zero,
 197   then TimeStamp is added to the record as the end time.
 198   If the record is found and TimeStamp is zero, then this function reads
 199   the current time stamp and adds that time stamp value to the record as the end time.
 200
 201   @param  Handle                  Pointer to environment specific context used
 202                                   to identify the component being measured.
 203   @param  Token                   Pointer to a Null-terminated ASCII string
 204                                   that identifies the component being measured.
 205   @param  Module                  Pointer to a Null-terminated ASCII string
 206                                   that identifies the module being measured.
 207   @param  TimeStamp               64-bit time stamp.
 208
 209   @retval RETURN_SUCCESS          The end of  the measurement was recorded.
 210   @retval RETURN_NOT_FOUND        The specified measurement record could not be found.
 211
 212 **/
 213 RETURN_STATUS
 214 EFIAPI
 215 EndPerformanceMeasurement (
 216   IN CONST VOID   *Handle,  OPTIONAL
 217   IN CONST CHAR8  *Token,   OPTIONAL
 218   IN CONST CHAR8  *Module,  OPTIONAL
 219   IN UINT64       TimeStamp
 220   )
 221 {
 222   PEI_PERFORMANCE_LOG_HEADER  *PeiPerformanceLog;
 223   PEI_PERFORMANCE_LOG_ENTRY   *LogEntryArray;
 224   UINT32                      Index;
 225
 226   if (TimeStamp == 0) {
 227     TimeStamp = GetPerformanceCounter ();
 228   }
 229
 230   PeiPerformanceLog = InternalGetPerformanceHobLog ();
 231   Index             = InternalSearchForLogEntry (PeiPerformanceLog, Handle, Token, Module);
 232   if (Index >= PeiPerformanceLog->NumberOfEntries) {
 233     return RETURN_NOT_FOUND;
 234   }
 235   LogEntryArray     = (PEI_PERFORMANCE_LOG_ENTRY *) (PeiPerformanceLog + 1);
 236   LogEntryArray[Index].EndTimeStamp = TimeStamp;
 237
 238   return RETURN_SUCCESS;
 239 }
 240
 241 /**
 242   Attempts to retrieve a performance measurement log entry from the performance measurement log.
 243
 244   Attempts to retrieve the performance log entry specified by LogEntryKey.  If LogEntryKey is
 245   zero on entry, then an attempt is made to retrieve the first entry from the performance log,
 246   and the key for the second entry in the log is returned.  If the performance log is empty,
 247   then no entry is retrieved and zero is returned.  If LogEntryKey is not zero, then the performance
 248   log entry associated with LogEntryKey is retrieved, and the key for the next entry in the log is
 249   returned.  If LogEntryKey is the key for the last entry in the log, then the last log entry is
 250   retrieved and an implementation specific non-zero key value that specifies the end of the performance
 251   log is returned.  If LogEntryKey is equal this implementation specific non-zero key value, then no entry
 252   is retrieved and zero is returned.  In the cases where a performance log entry can be returned,
 253   the log entry is returned in Handle, Token, Module, StartTimeStamp, and EndTimeStamp.
 254   If LogEntryKey is not a valid log entry key for the performance measurement log, then ASSERT().
 255   If Handle is NULL, then ASSERT().
 256   If Token is NULL, then ASSERT().
 257   If Module is NULL, then ASSERT().
 258   If StartTimeStamp is NULL, then ASSERT().
 259   If EndTimeStamp is NULL, then ASSERT().
 260
 261   @param  LogEntryKey             On entry, the key of the performance measurement log entry to retrieve.
 262                                   0, then the first performance measurement log entry is retrieved.
 263                                   On exit, the key of the next performance lof entry entry.
 264   @param  Handle                  Pointer to environment specific context used to identify the component
 265                                   being measured.
 266   @param  Token                   Pointer to a Null-terminated ASCII string that identifies the component
 267                                   being measured.
 268   @param  Module                  Pointer to a Null-terminated ASCII string that identifies the module
 269                                   being measured.
 270   @param  StartTimeStamp          Pointer to the 64-bit time stamp that was recorded when the measurement
 271                                   was started.
 272   @param  EndTimeStamp            Pointer to the 64-bit time stamp that was recorded when the measurement
 273                                   was ended.
 274
 275   @return The key for the next performance log entry (in general case).
 276
 277 **/
 278 UINTN
 279 EFIAPI
 280 GetPerformanceMeasurement (
 281   IN  UINTN       LogEntryKey,
 282   OUT CONST VOID  **Handle,
 283   OUT CONST CHAR8 **Token,
 284   OUT CONST CHAR8 **Module,
 285   OUT UINT64      *StartTimeStamp,
 286   OUT UINT64      *EndTimeStamp
 287   )
 288 {
 289   PEI_PERFORMANCE_LOG_HEADER  *PeiPerformanceLog;
 290   PEI_PERFORMANCE_LOG_ENTRY   *CurrentLogEntry;
 291   PEI_PERFORMANCE_LOG_ENTRY   *LogEntryArray;
 292   UINTN                       NumberOfEntries;
 293
 294   ASSERT (Handle != NULL);
 295   ASSERT (Token != NULL);
 296   ASSERT (Module != NULL);
 297   ASSERT (StartTimeStamp != NULL);
 298   ASSERT (EndTimeStamp != NULL);
 299
 300   PeiPerformanceLog = InternalGetPerformanceHobLog ();
 301
 302   NumberOfEntries   = (UINTN) (PeiPerformanceLog->NumberOfEntries);
 303   LogEntryArray     = (PEI_PERFORMANCE_LOG_ENTRY *) (PeiPerformanceLog + 1);
 304   //
 305   // Make sure that LogEntryKey is a valid log entry key.
 306   //
 307   ASSERT (LogEntryKey <= NumberOfEntries);
 308
 309   if (LogEntryKey == NumberOfEntries) {
 310     return 0;
 311   }
 312
 313   CurrentLogEntry = &(LogEntryArray[LogEntryKey++]);
 314
 315   *Handle         = (VOID *) (UINTN) (CurrentLogEntry->Handle);
 316   *Token          = CurrentLogEntry->Token;
 317   *Module         = CurrentLogEntry->Module;
 318   *StartTimeStamp = CurrentLogEntry->StartTimeStamp;
 319   *EndTimeStamp   = CurrentLogEntry->EndTimeStamp;
 320
 321   return LogEntryKey;
 322 }
 323
 324 /**
 325   Returns TRUE if the performance measurement macros are enabled.
 326
 327   This function returns TRUE if the PERFORMANCE_LIBRARY_PROPERTY_MEASUREMENT_ENABLED bit of
 328   PcdPerformanceLibraryPropertyMask is set.  Otherwise FALSE is returned.
 329
 330   @retval TRUE                    The PERFORMANCE_LIBRARY_PROPERTY_MEASUREMENT_ENABLED bit of
 331                                   PcdPerformanceLibraryPropertyMask is set.
 332   @retval FALSE                   The PERFORMANCE_LIBRARY_PROPERTY_MEASUREMENT_ENABLED bit of
 333                                   PcdPerformanceLibraryPropertyMask is clear.
 334
 335 **/
 336 BOOLEAN
 337 EFIAPI
 338 PerformanceMeasurementEnabled (
 339   VOID
 340   )
 341 {
 342   return (BOOLEAN) ((PcdGet8(PcdPerformanceLibraryPropertyMask) & PERFORMANCE_LIBRARY_PROPERTY_MEASUREMENT_ENABLED) != 0);
 343 }