void
NvRmPrivAp20DttPolicyUpdate(
NvRmDeviceHandle hRmDevice,
NvRmDtt* pDtt)
{
NvBool Throttle = NvOdmTmonThrottle(pDtt->hOdmTcore);
// CPU throttling limits are set at 50% of CPU frequency range (no
// throttling below this value), and at CPU frequency boundary that
// matches specified voltage throttling limit.
if ((!s_CpuThrottleMaxKHz) || (!s_CpuThrottleMinKHz))
{
NvU32 steps;
const NvRmFreqKHz* p = NvRmPrivModuleVscaleGetMaxKHzList(
hRmDevice, NvRmModuleID_Cpu, &steps);
NV_ASSERT(p && steps);
for (; steps != 0 ; steps--)
{
if (NVRM_DTT_VOLTAGE_THROTTLE_MV >= NvRmPrivModuleVscaleGetMV(
hRmDevice, NvRmModuleID_Cpu, p[steps-1]))
break;
}
NV_ASSERT(steps);
s_CpuThrottleMaxKHz = NV_MIN(
NvRmPrivGetSocClockLimits(NvRmModuleID_Cpu)->MaxKHz, p[steps-1]);
s_CpuThrottleMinKHz =
NvRmPrivGetSocClockLimits(NvRmModuleID_Cpu)->MaxKHz /
NVRM_DTT_RATIO_MAX;
NV_ASSERT(s_CpuThrottleMaxKHz > s_CpuThrottleMinKHz);
NV_ASSERT(s_CpuThrottleMinKHz > NVRM_DTT_CPU_DELTA_KHZ);
s_CpuThrottleKHz = s_CpuThrottleMaxKHz;
}
pDtt->TcorePolicy.PolicyRange = Throttle ? NvRmDttAp20PolicyRange_ThrottleDown :
NvRmDttAp20PolicyRange_FreeRunning;
pDtt->TcorePolicy.UpdateIntervalUs = Throttle ? NVRM_DTT_POLL_MS_CRITICAL * 1000 :
NV_WAIT_INFINITE;
}
void
NvRmPrivAp20DttPolicyUpdate(
NvRmDeviceHandle hRmDevice,
NvS32 TemperatureC,
NvRmDtt* pDtt)
{
NvRmDttAp20PolicyRange Range;
// CPU throttling limits are set at 50% of CPU frequency range (no
// throttling below this value), and at CPU frequency boundary that
// matches specified voltage throttling limit.
if ((!s_CpuThrottleMaxKHz) || (!s_CpuThrottleMinKHz))
{
NvU32 steps;
const NvRmFreqKHz* p = NvRmPrivModuleVscaleGetMaxKHzList(
hRmDevice, NvRmModuleID_Cpu, &steps);
NV_ASSERT(p && steps);
for (; steps != 0 ; steps--)
{
if (NVRM_DTT_VOLTAGE_THROTTLE_MV >= NvRmPrivModuleVscaleGetMV(
hRmDevice, NvRmModuleID_Cpu, p[steps-1]))
break;
}
NV_ASSERT(steps);
s_CpuThrottleMaxKHz = NV_MIN(
NvRmPrivGetSocClockLimits(NvRmModuleID_Cpu)->MaxKHz, p[steps-1]);
s_CpuThrottleMinKHz =
NvRmPrivGetSocClockLimits(NvRmModuleID_Cpu)->MaxKHz /
NVRM_DTT_RATIO_MAX;
NV_ASSERT(s_CpuThrottleMaxKHz > s_CpuThrottleMinKHz);
NV_ASSERT(s_CpuThrottleMinKHz > NVRM_DTT_CPU_DELTA_KHZ);
s_CpuThrottleKHz = s_CpuThrottleMaxKHz;
NV_ASSERT(pDtt->TcoreCaps.Tmin <
(NVRM_DTT_DEGREES_LOW - NVRM_DTT_DEGREES_HYSTERESIS));
NV_ASSERT(pDtt->TcoreCaps.Tmax > NVRM_DTT_DEGREES_HIGH);
}
// Advanced policy range state machine (one step at a time)
Range = (NvRmDttAp20PolicyRange)pDtt->TcorePolicy.PolicyRange;
switch (Range)
{
case NvRmDttAp20PolicyRange_Unknown:
Range = NvRmDttAp20PolicyRange_FreeRunning;
// fall through
case NvRmDttAp20PolicyRange_FreeRunning:
if (TemperatureC >= NVRM_DTT_DEGREES_LOW)
Range = NvRmDttAp20PolicyRange_LimitVoltage;
break;
case NvRmDttAp20PolicyRange_LimitVoltage:
if (TemperatureC <=
(NVRM_DTT_DEGREES_LOW - NVRM_DTT_DEGREES_HYSTERESIS))
Range = NvRmDttAp20PolicyRange_FreeRunning;
else if (TemperatureC >= NVRM_DTT_DEGREES_HIGH)
Range = NvRmDttAp20PolicyRange_ThrottleDown;
break;
case NvRmDttAp20PolicyRange_ThrottleDown:
if (TemperatureC <=
(NVRM_DTT_DEGREES_HIGH - NVRM_DTT_DEGREES_HYSTERESIS))
Range = NvRmDttAp20PolicyRange_LimitVoltage;
break;
default:
break;
}
/*
* Fill in new policy. Temperature limits are set around current
* temperature for the next out-of-limit interrupt (possible exception
* - temperature "jump" over two ranges would result in two interrupts
* in a row before limits cover the temperature). Polling time is set
* always in ThrottleDown range, and only for poll mode in other ranges.
*/
pDtt->CoreTemperatureC = TemperatureC;
switch (Range)
{
case NvRmDttAp20PolicyRange_FreeRunning:
pDtt->TcorePolicy.LowLimit = pDtt->TcoreLowLimitCaps.MinValue;
pDtt->TcorePolicy.HighLimit = NVRM_DTT_DEGREES_LOW;
pDtt->TcorePolicy.UpdateIntervalUs = pDtt->UseIntr ?
NV_WAIT_INFINITE : (NVRM_DTT_POLL_MS_SLOW * 1000);
break;
case NvRmDttAp20PolicyRange_LimitVoltage:
pDtt->TcorePolicy.LowLimit =
NVRM_DTT_DEGREES_LOW - NVRM_DTT_DEGREES_HYSTERESIS;
pDtt->TcorePolicy.HighLimit = NVRM_DTT_DEGREES_HIGH;
pDtt->TcorePolicy.UpdateIntervalUs = pDtt->UseIntr ?
NV_WAIT_INFINITE : (NVRM_DTT_POLL_MS_FAST * 1000);
break;
case NvRmDttAp20PolicyRange_ThrottleDown:
pDtt->TcorePolicy.LowLimit =
NVRM_DTT_DEGREES_HIGH - NVRM_DTT_DEGREES_HYSTERESIS;
pDtt->TcorePolicy.HighLimit = pDtt->TcoreHighLimitCaps.MaxValue;
pDtt->TcorePolicy.UpdateIntervalUs = NVRM_DTT_POLL_MS_CRITICAL * 1000;
break;
default:
NV_ASSERT(!"Invalid DTT policy range");
NvOsDebugPrintf("DTT: Invalid Range = %d\n", Range);
pDtt->TcorePolicy.HighLimit = ODM_TMON_PARAMETER_UNSPECIFIED;
pDtt->TcorePolicy.LowLimit = ODM_TMON_PARAMETER_UNSPECIFIED;
pDtt->TcorePolicy.PolicyRange = NvRmDttAp20PolicyRange_Unknown;
return;
}
pDtt->TcorePolicy.PolicyRange = (NvU32)Range;
}
