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/** @file
Copyright (c) 2017-2021, Arm Limited. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
System Control and Management Interface V1.0
http://infocenter.arm.com/help/topic/com.arm.doc.den0056a/
DEN0056A_System_Control_and_Management_Interface.pdf
**/
#include <Library/BaseMemoryLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Protocol/ArmScmiPerformanceProtocol.h>
#include "ArmScmiPerformanceProtocolPrivate.h"
#include "ScmiPrivate.h"
/** Return version of the performance management protocol supported by SCP.
firmware.
@param[in] This A Pointer to SCMI_PERFORMANCE_PROTOCOL Instance.
@param[out] Version Version of the supported SCMI performance management
protocol.
@retval EFI_SUCCESS The version is returned.
@retval EFI_DEVICE_ERROR SCP returns an SCMI error.
@retval !(EFI_SUCCESS) Other errors.
**/
STATIC
EFI_STATUS
PerformanceGetVersion (
IN SCMI_PERFORMANCE_PROTOCOL *This,
OUT UINT32 *Version
)
{
return ScmiGetProtocolVersion (ScmiProtocolIdPerformance, Version);
}
/** Return protocol attributes of the performance management protocol.
@param[in] This A Pointer to SCMI_PERFORMANCE_PROTOCOL Instance.
@param[out] Attributes Protocol attributes.
@retval EFI_SUCCESS Protocol attributes are returned.
@retval EFI_DEVICE_ERROR SCP returns an SCMI error.
@retval !(EFI_SUCCESS) Other errors.
**/
STATIC
EFI_STATUS
PerformanceGetAttributes (
IN SCMI_PERFORMANCE_PROTOCOL *This,
OUT SCMI_PERFORMANCE_PROTOCOL_ATTRIBUTES *Attributes
)
{
EFI_STATUS Status;
UINT32* ReturnValues;
Status = ScmiGetProtocolAttributes (
ScmiProtocolIdPerformance,
&ReturnValues
);
if (EFI_ERROR (Status)) {
return Status;
}
CopyMem (
Attributes,
ReturnValues,
sizeof (SCMI_PERFORMANCE_PROTOCOL_ATTRIBUTES)
);
return EFI_SUCCESS;
}
/** Return performance domain attributes.
@param[in] This A Pointer to SCMI_PERFORMANCE_PROTOCOL Instance.
@param[in] DomainId Identifier for the performance domain.
@param[out] Attributes Performance domain attributes.
@retval EFI_SUCCESS Domain attributes are returned.
@retval EFI_DEVICE_ERROR SCP returns an SCMI error.
@retval !(EFI_SUCCESS) Other errors.
**/
STATIC
EFI_STATUS
PerformanceDomainAttributes (
IN SCMI_PERFORMANCE_PROTOCOL *This,
IN UINT32 DomainId,
OUT SCMI_PERFORMANCE_DOMAIN_ATTRIBUTES *DomainAttributes
)
{
EFI_STATUS Status;
UINT32 *MessageParams;
UINT32 *ReturnValues;
UINT32 PayloadLength;
SCMI_COMMAND Cmd;
Status = ScmiCommandGetPayload (&MessageParams);
if (EFI_ERROR (Status)) {
return Status;
}
*MessageParams = DomainId;
Cmd.ProtocolId = ScmiProtocolIdPerformance;
Cmd.MessageId = SCMI_MESSAGE_ID_PERFORMANCE_DOMAIN_ATTRIBUTES;
PayloadLength = sizeof (DomainId);
Status = ScmiCommandExecute (
&Cmd,
&PayloadLength,
&ReturnValues
);
if (EFI_ERROR (Status)) {
return Status;
}
CopyMem (
DomainAttributes,
ReturnValues,
sizeof (SCMI_PERFORMANCE_DOMAIN_ATTRIBUTES)
);
return EFI_SUCCESS;
}
/** Return list of performance domain levels of a given domain.
@param[in] This A Pointer to SCMI_PERFORMANCE_PROTOCOL Instance.
@param[in] DomainId Identifier for the performance domain.
@param[out] NumLevels Total number of levels a domain can support.
@param[in,out] LevelArraySize Size of the performance level array.
@param[out] LevelArray Array of the performance levels.
@retval EFI_SUCCESS Domain levels are returned.
@retval EFI_DEVICE_ERROR SCP returns an SCMI error.
@retval EFI_BUFFER_TOO_SMALL LevelArraySize is too small for the result.
It has been updated to the size needed.
@retval !(EFI_SUCCESS) Other errors.
**/
STATIC
EFI_STATUS
PerformanceDescribeLevels (
IN SCMI_PERFORMANCE_PROTOCOL *This,
IN UINT32 DomainId,
OUT UINT32 *NumLevels,
IN OUT UINT32 *LevelArraySize,
OUT SCMI_PERFORMANCE_LEVEL *LevelArray
)
{
EFI_STATUS Status;
UINT32 PayloadLength;
SCMI_COMMAND Cmd;
UINT32* MessageParams;
UINT32 LevelIndex;
UINT32 RequiredSize;
UINT32 LevelNo;
UINT32 ReturnNumLevels;
UINT32 ReturnRemainNumLevels;
PERF_DESCRIBE_LEVELS *Levels;
Status = ScmiCommandGetPayload (&MessageParams);
if (EFI_ERROR (Status)) {
return Status;
}
LevelIndex = 0;
RequiredSize = 0;
*MessageParams++ = DomainId;
Cmd.ProtocolId = ScmiProtocolIdPerformance;
Cmd.MessageId = SCMI_MESSAGE_ID_PERFORMANCE_DESCRIBE_LEVELS;
do {
*MessageParams = LevelIndex;
// Note, PayloadLength is an IN/OUT parameter.
PayloadLength = sizeof (DomainId) + sizeof (LevelIndex);
Status = ScmiCommandExecute (
&Cmd,
&PayloadLength,
(UINT32**)&Levels
);
if (EFI_ERROR (Status)) {
return Status;
}
ReturnNumLevels = NUM_PERF_LEVELS (Levels->NumLevels);
ReturnRemainNumLevels = NUM_REMAIN_PERF_LEVELS (Levels->NumLevels);
if (RequiredSize == 0) {
*NumLevels = ReturnNumLevels + ReturnRemainNumLevels;
RequiredSize = (*NumLevels) * sizeof (SCMI_PERFORMANCE_LEVEL);
if (RequiredSize > (*LevelArraySize)) {
// Update LevelArraySize with required size.
*LevelArraySize = RequiredSize;
return EFI_BUFFER_TOO_SMALL;
}
}
for (LevelNo = 0; LevelNo < ReturnNumLevels; LevelNo++) {
CopyMem (
&LevelArray[LevelIndex++],
&Levels->PerfLevel[LevelNo],
sizeof (SCMI_PERFORMANCE_LEVEL)
);
}
} while (ReturnRemainNumLevels != 0);
*LevelArraySize = RequiredSize;
return EFI_SUCCESS;
}
/** Set performance limits of a domain.
@param[in] This A Pointer to SCMI_PERFORMANCE_PROTOCOL Instance.
@param[in] DomainId Identifier for the performance domain.
@param[in] Limit Performance limit to set.
@retval EFI_SUCCESS Performance limits set successfully.
@retval EFI_DEVICE_ERROR SCP returns an SCMI error.
@retval !(EFI_SUCCESS) Other errors.
**/
EFI_STATUS
PerformanceLimitsSet (
IN SCMI_PERFORMANCE_PROTOCOL *This,
IN UINT32 DomainId,
IN SCMI_PERFORMANCE_LIMITS *Limits
)
{
EFI_STATUS Status;
UINT32 PayloadLength;
SCMI_COMMAND Cmd;
UINT32 *MessageParams;
Status = ScmiCommandGetPayload (&MessageParams);
if (EFI_ERROR (Status)) {
return Status;
}
*MessageParams++ = DomainId;
*MessageParams++ = Limits->RangeMax;
*MessageParams = Limits->RangeMin;
Cmd.ProtocolId = ScmiProtocolIdPerformance;
Cmd.MessageId = SCMI_MESSAGE_ID_PERFORMANCE_LIMITS_SET;
PayloadLength = sizeof (DomainId) + sizeof (SCMI_PERFORMANCE_LIMITS);
Status = ScmiCommandExecute (
&Cmd,
&PayloadLength,
NULL
);
return Status;
}
/** Get performance limits of a domain.
@param[in] This A Pointer to SCMI_PERFORMANCE_PROTOCOL Instance.
@param[in] DomainId Identifier for the performance domain.
@param[out] Limit Performance Limits of the domain.
@retval EFI_SUCCESS Performance limits are returned.
@retval EFI_DEVICE_ERROR SCP returns an SCMI error.
@retval !(EFI_SUCCESS) Other errors.
**/
EFI_STATUS
PerformanceLimitsGet (
SCMI_PERFORMANCE_PROTOCOL *This,
UINT32 DomainId,
SCMI_PERFORMANCE_LIMITS *Limits
)
{
EFI_STATUS Status;
UINT32 PayloadLength;
SCMI_COMMAND Cmd;
UINT32 *MessageParams;
SCMI_PERFORMANCE_LIMITS *ReturnValues;
Status = ScmiCommandGetPayload (&MessageParams);
if (EFI_ERROR (Status)) {
return Status;
}
*MessageParams = DomainId;
Cmd.ProtocolId = ScmiProtocolIdPerformance;
Cmd.MessageId = SCMI_MESSAGE_ID_PERFORMANCE_LIMITS_GET;
PayloadLength = sizeof (DomainId);
Status = ScmiCommandExecute (
&Cmd,
&PayloadLength,
(UINT32**)&ReturnValues
);
if (EFI_ERROR (Status)) {
return Status;
}
Limits->RangeMax = ReturnValues->RangeMax;
Limits->RangeMin = ReturnValues->RangeMin;
return EFI_SUCCESS;
}
/** Set performance level of a domain.
@param[in] This A Pointer to SCMI_PERFORMANCE_PROTOCOL Instance.
@param[in] DomainId Identifier for the performance domain.
@param[in] Level Performance level of the domain.
@retval EFI_SUCCESS Performance level set successfully.
@retval EFI_DEVICE_ERROR SCP returns an SCMI error.
@retval !(EFI_SUCCESS) Other errors.
**/
EFI_STATUS
PerformanceLevelSet (
IN SCMI_PERFORMANCE_PROTOCOL *This,
IN UINT32 DomainId,
IN UINT32 Level
)
{
EFI_STATUS Status;
UINT32 PayloadLength;
SCMI_COMMAND Cmd;
UINT32 *MessageParams;
Status = ScmiCommandGetPayload (&MessageParams);
if (EFI_ERROR (Status)) {
return Status;
}
*MessageParams++ = DomainId;
*MessageParams = Level;
Cmd.ProtocolId = ScmiProtocolIdPerformance;
Cmd.MessageId = SCMI_MESSAGE_ID_PERFORMANCE_LEVEL_SET;
PayloadLength = sizeof (DomainId) + sizeof (Level);
Status = ScmiCommandExecute (
&Cmd,
&PayloadLength,
NULL
);
return Status;
}
/** Get performance level of a domain.
@param[in] This A Pointer to SCMI_PERFORMANCE_PROTOCOL Instance.
@param[in] DomainId Identifier for the performance domain.
@param[out] Level Performance level of the domain.
@retval EFI_SUCCESS Performance level got successfully.
@retval EFI_DEVICE_ERROR SCP returns an SCMI error.
@retval !(EFI_SUCCESS) Other errors.
**/
EFI_STATUS
PerformanceLevelGet (
IN SCMI_PERFORMANCE_PROTOCOL *This,
IN UINT32 DomainId,
OUT UINT32 *Level
)
{
EFI_STATUS Status;
UINT32 PayloadLength;
SCMI_COMMAND Cmd;
UINT32 *ReturnValues;
UINT32 *MessageParams;
Status = ScmiCommandGetPayload (&MessageParams);
if (EFI_ERROR (Status)) {
return Status;
}
*MessageParams = DomainId;
Cmd.ProtocolId = ScmiProtocolIdPerformance;
Cmd.MessageId = SCMI_MESSAGE_ID_PERFORMANCE_LEVEL_GET;
PayloadLength = sizeof (DomainId);
Status = ScmiCommandExecute (
&Cmd,
&PayloadLength,
&ReturnValues
);
if (EFI_ERROR (Status)) {
return Status;
}
*Level = *ReturnValues;
return EFI_SUCCESS;
}
// Instance of the SCMI performance management protocol.
STATIC CONST SCMI_PERFORMANCE_PROTOCOL PerformanceProtocol = {
PerformanceGetVersion,
PerformanceGetAttributes,
PerformanceDomainAttributes,
PerformanceDescribeLevels,
PerformanceLimitsSet,
PerformanceLimitsGet,
PerformanceLevelSet,
PerformanceLevelGet
};
/** Initialize performance management protocol and install on a given Handle.
@param[in] Handle Handle to install performance management
protocol.
@retval EFI_SUCCESS Performance protocol installed successfully.
**/
EFI_STATUS
ScmiPerformanceProtocolInit (
IN EFI_HANDLE* Handle
)
{
return gBS->InstallMultipleProtocolInterfaces (
Handle,
&gArmScmiPerformanceProtocolGuid,
&PerformanceProtocol,
NULL
);
}
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