diff options
Diffstat (limited to 'MdeModulePkg/Library/SmmPerformanceLib/SmmPerformanceLib.c')
| -rw-r--r-- | MdeModulePkg/Library/SmmPerformanceLib/SmmPerformanceLib.c | 290 |
1 files changed, 290 insertions, 0 deletions
diff --git a/MdeModulePkg/Library/SmmPerformanceLib/SmmPerformanceLib.c b/MdeModulePkg/Library/SmmPerformanceLib/SmmPerformanceLib.c new file mode 100644 index 0000000000..982d8ac43a --- /dev/null +++ b/MdeModulePkg/Library/SmmPerformanceLib/SmmPerformanceLib.c @@ -0,0 +1,290 @@ +/** @file
+ Performance Library used in SMM phase.
+
+ This library instance provides infrastructure for SMM drivers to log performance
+ data. It consumes SMM Performance Protocol published by SmmCorePerformanceLib
+ to log performance data. If Performance Protocol is not available, it does not log any
+ performance information.
+
+ Copyright (c) 2011, Intel Corporation. All rights reserved.<BR>
+This program and the accompanying materials
+are licensed and made available under the terms and conditions of the BSD License
+which accompanies this distribution. The full text of the license may be found at
+http://opensource.org/licenses/bsd-license.php
+
+THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+
+#include <Guid/Performance.h>
+
+#include <Library/PerformanceLib.h>
+#include <Library/DebugLib.h>
+#include <Library/SmmServicesTableLib.h>
+#include <Library/PcdLib.h>
+#include <Library/BaseMemoryLib.h>
+
+#include <Protocol/SmmCommunication.h>
+
+//
+// The cached performance protocol interface.
+//
+PERFORMANCE_PROTOCOL *mPerformance = NULL;
+BOOLEAN mPerformanceMeasurementEnabled;
+
+
+/**
+ The constructor function initializes Performance infrastructure for DXE phase.
+
+ The constructor function publishes Performance protocol, allocates memory to log DXE performance
+ and merges PEI performance data to DXE performance log.
+ It will ASSERT() if one of these operations fails and it will always return EFI_SUCCESS.
+
+ @param ImageHandle The firmware allocated handle for the EFI image.
+ @param SystemTable A pointer to the EFI System Table.
+
+ @retval EFI_SUCCESS The constructor always returns EFI_SUCCESS.
+
+**/
+EFI_STATUS
+EFIAPI
+SmmPerformanceLibConstructor (
+ IN EFI_HANDLE ImageHandle,
+ IN EFI_SYSTEM_TABLE *SystemTable
+ )
+{
+
+ mPerformanceMeasurementEnabled = (BOOLEAN) ((PcdGet8(PcdPerformanceLibraryPropertyMask) & PERFORMANCE_LIBRARY_PROPERTY_MEASUREMENT_ENABLED) != 0);
+
+ return EFI_SUCCESS;
+}
+
+/**
+ The constructor function caches the pointer to Performance protocol.
+
+ The constructor function locates SMM erformance protocol from the SMM protocol database.
+ It will ASSERT() if that operation fails and it will always return EFI_SUCCESS.
+
+ @retval EFI_SUCCESS Performance protocol is successfully located.
+ @retval Other Performance protocol is not located to log performance.
+
+**/
+EFI_STATUS
+GetPerformanceProtocol (
+ VOID
+ )
+{
+ EFI_STATUS Status;
+ PERFORMANCE_PROTOCOL *Performance;
+
+ if (mPerformance != NULL) {
+ return EFI_SUCCESS;
+ }
+
+ Status = gSmst->SmmLocateProtocol (&gSmmPerformanceProtocolGuid, NULL, (VOID **) &Performance);
+ if (!EFI_ERROR (Status)) {
+ ASSERT (Performance != NULL);
+ //
+ // Cache performance protocol.
+ //
+ mPerformance = Performance;
+ }
+
+ return Status;
+}
+
+/**
+ Creates a record for the beginning of a performance measurement.
+
+ Creates a record that contains the Handle, Token, and Module.
+ If TimeStamp is not zero, then TimeStamp is added to the record as the start time.
+ If TimeStamp is zero, then this function reads the current time stamp
+ and adds that time stamp value to the record as the start time.
+
+ @param Handle Pointer to environment specific context used
+ to identify the component being measured.
+ @param Token Pointer to a Null-terminated ASCII string
+ that identifies the component being measured.
+ @param Module Pointer to a Null-terminated ASCII string
+ that identifies the module being measured.
+ @param TimeStamp 64-bit time stamp.
+
+ @retval RETURN_SUCCESS The start of the measurement was recorded.
+ @retval RETURN_OUT_OF_RESOURCES There are not enough resources to record the measurement.
+
+**/
+RETURN_STATUS
+EFIAPI
+StartPerformanceMeasurement (
+ IN CONST VOID *Handle, OPTIONAL
+ IN CONST CHAR8 *Token, OPTIONAL
+ IN CONST CHAR8 *Module, OPTIONAL
+ IN UINT64 TimeStamp
+ )
+{
+ EFI_STATUS Status;
+
+ Status = GetPerformanceProtocol ();
+ if (EFI_ERROR (Status)) {
+ return RETURN_OUT_OF_RESOURCES;
+ }
+
+ Status = mPerformance->StartGauge (Handle, Token, Module, TimeStamp);
+
+ return (RETURN_STATUS) Status;
+}
+
+/**
+ Fills in the end time of a performance measurement.
+
+ Looks up the record that matches Handle, Token, and Module.
+ If the record can not be found then return RETURN_NOT_FOUND.
+ If the record is found and TimeStamp is not zero,
+ then TimeStamp is added to the record as the end time.
+ If the record is found and TimeStamp is zero, then this function reads
+ the current time stamp and adds that time stamp value to the record as the end time.
+ If this function is called multiple times for the same record, then the end time is overwritten.
+
+ @param Handle Pointer to environment specific context used
+ to identify the component being measured.
+ @param Token Pointer to a Null-terminated ASCII string
+ that identifies the component being measured.
+ @param Module Pointer to a Null-terminated ASCII string
+ that identifies the module being measured.
+ @param TimeStamp 64-bit time stamp.
+
+ @retval RETURN_SUCCESS The end of the measurement was recorded.
+ @retval RETURN_NOT_FOUND The specified measurement record could not be found.
+
+**/
+RETURN_STATUS
+EFIAPI
+EndPerformanceMeasurement (
+ IN CONST VOID *Handle, OPTIONAL
+ IN CONST CHAR8 *Token, OPTIONAL
+ IN CONST CHAR8 *Module, OPTIONAL
+ IN UINT64 TimeStamp
+ )
+{
+ EFI_STATUS Status;
+
+ Status = GetPerformanceProtocol ();
+ if (EFI_ERROR (Status)) {
+ return RETURN_NOT_FOUND;
+ }
+
+ Status = mPerformance->EndGauge (Handle, Token, Module, TimeStamp);
+
+ return (RETURN_STATUS) Status;
+}
+
+/**
+ Attempts to retrieve a performance measurement log entry from the performance measurement log.
+
+ Attempts to retrieve the performance log entry specified by LogEntryKey. If LogEntryKey is
+ zero on entry, then an attempt is made to retrieve the first entry from the performance log,
+ and the key for the second entry in the log is returned. If the performance log is empty,
+ then no entry is retrieved and zero is returned. If LogEntryKey is not zero, then the performance
+ log entry associated with LogEntryKey is retrieved, and the key for the next entry in the log is
+ returned. If LogEntryKey is the key for the last entry in the log, then the last log entry is
+ retrieved and an implementation specific non-zero key value that specifies the end of the performance
+ log is returned. If LogEntryKey is equal this implementation specific non-zero key value, then no entry
+ is retrieved and zero is returned. In the cases where a performance log entry can be returned,
+ the log entry is returned in Handle, Token, Module, StartTimeStamp, and EndTimeStamp.
+ If LogEntryKey is not a valid log entry key for the performance measurement log, then ASSERT().
+ If Handle is NULL, then ASSERT().
+ If Token is NULL, then ASSERT().
+ If Module is NULL, then ASSERT().
+ If StartTimeStamp is NULL, then ASSERT().
+ If EndTimeStamp is NULL, then ASSERT().
+
+ @param LogEntryKey On entry, the key of the performance measurement log entry to retrieve.
+ 0, then the first performance measurement log entry is retrieved.
+ On exit, the key of the next performance log entry.
+ @param Handle Pointer to environment specific context used to identify the component
+ being measured.
+ @param Token Pointer to a Null-terminated ASCII string that identifies the component
+ being measured.
+ @param Module Pointer to a Null-terminated ASCII string that identifies the module
+ being measured.
+ @param StartTimeStamp Pointer to the 64-bit time stamp that was recorded when the measurement
+ was started.
+ @param EndTimeStamp Pointer to the 64-bit time stamp that was recorded when the measurement
+ was ended.
+
+ @return The key for the next performance log entry (in general case).
+
+**/
+UINTN
+EFIAPI
+GetPerformanceMeasurement (
+ IN UINTN LogEntryKey,
+ OUT CONST VOID **Handle,
+ OUT CONST CHAR8 **Token,
+ OUT CONST CHAR8 **Module,
+ OUT UINT64 *StartTimeStamp,
+ OUT UINT64 *EndTimeStamp
+ )
+{
+ EFI_STATUS Status;
+ GAUGE_DATA_ENTRY *GaugeData;
+
+ GaugeData = NULL;
+
+ ASSERT (Handle != NULL);
+ ASSERT (Token != NULL);
+ ASSERT (Module != NULL);
+ ASSERT (StartTimeStamp != NULL);
+ ASSERT (EndTimeStamp != NULL);
+
+ Status = GetPerformanceProtocol ();
+ if (EFI_ERROR (Status)) {
+ return 0;
+ }
+
+ Status = mPerformance->GetGauge (LogEntryKey++, &GaugeData);
+
+ //
+ // Make sure that LogEntryKey is a valid log entry key,
+ //
+ ASSERT (Status != EFI_INVALID_PARAMETER);
+
+ if (EFI_ERROR (Status)) {
+ //
+ // The LogEntryKey is the last entry (equals to the total entry number).
+ //
+ return 0;
+ }
+
+ ASSERT (GaugeData != NULL);
+
+ *Handle = (VOID *) (UINTN) GaugeData->Handle;
+ *Token = GaugeData->Token;
+ *Module = GaugeData->Module;
+ *StartTimeStamp = GaugeData->StartTimeStamp;
+ *EndTimeStamp = GaugeData->EndTimeStamp;
+
+}
+
+/**
+ Returns TRUE if the performance measurement macros are enabled.
+
+ This function returns TRUE if the PERFORMANCE_LIBRARY_PROPERTY_MEASUREMENT_ENABLED bit of
+ PcdPerformanceLibraryPropertyMask is set. Otherwise FALSE is returned.
+
+ @retval TRUE The PERFORMANCE_LIBRARY_PROPERTY_MEASUREMENT_ENABLED bit of
+ PcdPerformanceLibraryPropertyMask is set.
+ @retval FALSE The PERFORMANCE_LIBRARY_PROPERTY_MEASUREMENT_ENABLED bit of
+ PcdPerformanceLibraryPropertyMask is clear.
+
+**/
+BOOLEAN
+EFIAPI
+PerformanceMeasurementEnabled (
+ VOID
+ )
+{
+ return mPerformanceMeasurementEnabled;
+}
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