| Message ID | 20210225101854.13896-5-quan@os.amperecomputing.com |
|---|---|
| State | New |
| Headers | show |
| Series | Add Ampere's Altra SMPro hwmon driver | expand |
On 2/25/21 2:18 AM, Quan Nguyen wrote: > Add documentation for the Ampere(R)'s Altra(R) SMpro hwmon driver. > > Signed-off-by: Thu Nguyen <thu@os.amperecomputing.com> > Signed-off-by: Quan Nguyen <quan@os.amperecomputing.com> > --- > Documentation/hwmon/index.rst | 1 + > Documentation/hwmon/smpro-hwmon.rst | 100 ++++++++++++++++++++++++++++ > 2 files changed, 101 insertions(+) > create mode 100644 Documentation/hwmon/smpro-hwmon.rst > > diff --git a/Documentation/hwmon/index.rst b/Documentation/hwmon/index.rst > index 8d5a2df1ecb6..b48a980ed08b 100644 > --- a/Documentation/hwmon/index.rst > +++ b/Documentation/hwmon/index.rst > @@ -164,6 +164,7 @@ Hardware Monitoring Kernel Drivers > sis5595 > sl28cpld > smm665 > + smpro-hwmon "hwmon" seems a bit redundant here. > smsc47b397 > smsc47m192 > smsc47m1 > diff --git a/Documentation/hwmon/smpro-hwmon.rst b/Documentation/hwmon/smpro-hwmon.rst > new file mode 100644 > index 000000000000..d546b90982e5 > --- /dev/null > +++ b/Documentation/hwmon/smpro-hwmon.rst > @@ -0,0 +1,100 @@ > +.. SPDX-License-Identifier: GPL-2.0-or-later > + > +Kernel driver Ampere(R)'s Altra(R) SMpro hwmon > +============================================== > + > +Supported chips: > + > + * Ampere(R) Altra(R) > + > + Prefix: 'smpro' > + > + Reference: Altra SoC BMC Interface Specification > + > +Author: Thu Nguyen <thu@os.amperecomputing.com> > + > +Description > +----------- > +This driver supports hardware monitoring for Ampere(R) Altra(R) SoC's based on the > +SMpro co-processor (SMpro). > +The following sensor types are supported by the driver: > + > + * temperature > + * voltage > + * current > + * power > + > +The SMpro interface provides the registers to query the various sensors and > +their values which are then exported to userspace by this driver. > + > +Usage Notes > +----------- > + > +SMpro hwmon driver creates two sysfs files for each sensor. > + > +* File ``<sensor_type><idx>_label`` reports the sensor label. > +* File ``<sensor_type><idx>_input`` returns the sensor value. > + > +The sysfs files are allocated in the SMpro root fs folder. > +There is one root folder for each SMpro instance. > + > +When the SoC is turned off, the driver is failed to read the registers. > +It returns TIMEDOUT Error(-110) for the read sensors. > + Maybe better something like When the SoC is turned off, the driver will fail to read registers and return -ETIMEDOUT. Can that indeed happen ? That seems to be highly undesirable. > +Sysfs entries > +------------- > + > +The following sysfs files are supported: > + > +* Ampere(R) Altra(R): > + > +=============== ============= ======= =============================================== > +Name Unit Perm Description > +temp1_input mili Celsius RO SoC temperature s/mili/milli/ throughout > +temp2_input mili Celsius RO Highest temperature reported by the SoC VRDs > +temp3_input mili Celsius RO Highest temperature reported by the DIMM VRDs > +temp4_input mili Celsius RO Highest temperature reported by the Core VRDs What does "highest" stand for here ? Is it the _current_ highest temperature, added up by the hardware/firmware, or is it the historic highest temperature ? Historic data should be reported as tempX_highest. > +temp5_input mili Celsius RO Highest temperature of DIMM Channel 0 to 3 drop; reported individually. > +temp6_input mili Celsius RO Temperature of DIMM0 on CH0 > +temp7_input mili Celsius RO Temperature of DIMM0 on CH1 > +temp8_input mili Celsius RO Temperature of DIMM0 on CH2 > +temp9_input mili Celsius RO Temperature of DIMM0 on CH3 > +temp10_input mili Celsius RO Highest temperature of DIMM Channel 4 to 7 drop; reported individually. > +temp11_input mili Celsius RO Temperature of DIMM0 on CH4 > +temp12_input mili Celsius RO Temperature of DIMM0 on CH5 > +temp13_input mili Celsius RO Temperature of DIMM0 on CH6 > +temp14_input mili Celsius RO Temperature of DIMM0 on CH7 > +temp15_input mili Celsius RO MEM HOT Threshold > +temp16_input mili Celsius RO SoC VRD HOT Threshold Report as tempX_max or tempX_crit, as appropriate (eg temp2_max or temp2_crit for SoC VRD HOT Threshold). If there is a single threshold temperature for all DIMMs, report the same limit value for all DIMM temperature sensors. > +temp17_input mili Celsius RO Highest temperature reported by the RCA VRD Same question about "highest" as above. Either "highest" is inappropriate, or there are multiple RCA VRDs and only the highest temperature of those is reported (which should be explicitly stated). > +in0_input mili Volt RO Core voltage > +in1_input mili Volt RO SoC voltage > +in2_input mili Volt RO DIMM VRD1 voltage > +in3_input mili Volt RO DIMM VRD2 voltage > +in4_input mili Volt RO Maximum voltage of DIMM VRD1 and VRD2 drop; reported individually. > +in5_input mili Volt RO RCA VRD voltage > +cur1_input mili Ampere RO Core VRD current > +cur2_input mili Ampere RO SoC VRD current > +cur3_input mili Ampere RO DIMM VRD1 current > +cur4_input mili Ampere RO DIMM VRD2 current > +cur5_input mili Ampere RO RCA VRD current > +power1_input nano Wat RO Core VRD power Expected scale is micro-Watt. > +power2_input nano Wat RO SoC VRD power > +power3_input nano Wat RO DIMM VRD1 power > +power4_input nano Wat RO DIMM VRD2 power > +power5_input nano Wat RO CPU VRD power, total of SoC and Core VRD power drop > +power6_input nano Wat RO Total of DIMM VRD1 and VRD2 power drop > +power7_input nano Wat RO RCA VRD power > +power8_input nano Wat RO Socket TDP Report as max attribute > +=============== ============= ======= =============================================== > + > +Example:: > + > + # cat in0_input > + 830 > + # cat temp1_input > + 37000 > + # cat curr1_input > + 9000 > + # cat power5_input > + 19500000 >
On 25/02/2021 23:42, Guenter Roeck wrote: > On 2/25/21 2:18 AM, Quan Nguyen wrote: >> Add documentation for the Ampere(R)'s Altra(R) SMpro hwmon driver. >> >> Signed-off-by: Thu Nguyen <thu@os.amperecomputing.com> >> Signed-off-by: Quan Nguyen <quan@os.amperecomputing.com> >> --- >> Documentation/hwmon/index.rst | 1 + >> Documentation/hwmon/smpro-hwmon.rst | 100 ++++++++++++++++++++++++++++ >> 2 files changed, 101 insertions(+) >> create mode 100644 Documentation/hwmon/smpro-hwmon.rst >> >> diff --git a/Documentation/hwmon/index.rst b/Documentation/hwmon/index.rst >> index 8d5a2df1ecb6..b48a980ed08b 100644 >> --- a/Documentation/hwmon/index.rst >> +++ b/Documentation/hwmon/index.rst >> @@ -164,6 +164,7 @@ Hardware Monitoring Kernel Drivers >> sis5595 >> sl28cpld >> smm665 >> + smpro-hwmon > > "hwmon" seems a bit redundant here. > Dear Guenter, That is necessary for HWMON because SMpro supports monitoring and reporting various data not only hwmon-related data but also including RAS errors, and other miscellaneous information >> smsc47b397 >> smsc47m192 >> smsc47m1 >> diff --git a/Documentation/hwmon/smpro-hwmon.rst b/Documentation/hwmon/smpro-hwmon.rst >> new file mode 100644 >> index 000000000000..d546b90982e5 >> --- /dev/null >> +++ b/Documentation/hwmon/smpro-hwmon.rst >> @@ -0,0 +1,100 @@ >> +.. SPDX-License-Identifier: GPL-2.0-or-later >> + >> +Kernel driver Ampere(R)'s Altra(R) SMpro hwmon >> +============================================== >> + >> +Supported chips: >> + >> + * Ampere(R) Altra(R) >> + >> + Prefix: 'smpro' >> + >> + Reference: Altra SoC BMC Interface Specification >> + >> +Author: Thu Nguyen <thu@os.amperecomputing.com> >> + >> +Description >> +----------- >> +This driver supports hardware monitoring for Ampere(R) Altra(R) SoC's based on the >> +SMpro co-processor (SMpro). >> +The following sensor types are supported by the driver: >> + >> + * temperature >> + * voltage >> + * current >> + * power >> + >> +The SMpro interface provides the registers to query the various sensors and >> +their values which are then exported to userspace by this driver. >> + >> +Usage Notes >> +----------- >> + >> +SMpro hwmon driver creates two sysfs files for each sensor. >> + >> +* File ``<sensor_type><idx>_label`` reports the sensor label. >> +* File ``<sensor_type><idx>_input`` returns the sensor value. >> + >> +The sysfs files are allocated in the SMpro root fs folder. >> +There is one root folder for each SMpro instance. >> + >> +When the SoC is turned off, the driver is failed to read the registers. >> +It returns TIMEDOUT Error(-110) for the read sensors. >> + > > Maybe better something like > > When the SoC is turned off, the driver will fail to read registers > and return -ETIMEDOUT. > > Can that indeed happen ? That seems to be highly undesirable. > Thanks Guenter, Will apply this in next version. >> +Sysfs entries >> +------------- >> + >> +The following sysfs files are supported: >> + >> +* Ampere(R) Altra(R): >> + >> +=============== ============= ======= =============================================== >> +Name Unit Perm Description >> +temp1_input mili Celsius RO SoC temperature > > s/mili/milli/ throughout > Yes, thanks for catching this. >> +temp2_input mili Celsius RO Highest temperature reported by the SoC VRDs >> +temp3_input mili Celsius RO Highest temperature reported by the DIMM VRDs >> +temp4_input mili Celsius RO Highest temperature reported by the Core VRDs > > What does "highest" stand for here ? Is it the _current_ highest > temperature, added up by the hardware/firmware, or is it the historic > highest temperature ? Historic data should be reported as tempX_highest. > >> +temp5_input mili Celsius RO Highest temperature of DIMM Channel 0 to 3 > > drop; reported individually. > Will drop in next version >> +temp6_input mili Celsius RO Temperature of DIMM0 on CH0 >> +temp7_input mili Celsius RO Temperature of DIMM0 on CH1 >> +temp8_input mili Celsius RO Temperature of DIMM0 on CH2 >> +temp9_input mili Celsius RO Temperature of DIMM0 on CH3 >> +temp10_input mili Celsius RO Highest temperature of DIMM Channel 4 to 7 > > drop; reported individually. > Yes, this one as well. >> +temp11_input mili Celsius RO Temperature of DIMM0 on CH4 >> +temp12_input mili Celsius RO Temperature of DIMM0 on CH5 >> +temp13_input mili Celsius RO Temperature of DIMM0 on CH6 >> +temp14_input mili Celsius RO Temperature of DIMM0 on CH7 >> +temp15_input mili Celsius RO MEM HOT Threshold >> +temp16_input mili Celsius RO SoC VRD HOT Threshold > > Report as tempX_max or tempX_crit, as appropriate (eg temp2_max or > temp2_crit for SoC VRD HOT Threshold). If there is a single threshold > temperature for all DIMMs, report the same limit value for all DIMM > temperature sensors. > >> +temp17_input mili Celsius RO Highest temperature reported by the RCA VRD > > Same question about "highest" as above. Either "highest" is > inappropriate, or there are multiple RCA VRDs and only the > highest temperature of those is reported (which should be > explicitly stated). > This definitely need to be re-considered. Will try your suggestion in next version. >> +in0_input mili Volt RO Core voltage >> +in1_input mili Volt RO SoC voltage >> +in2_input mili Volt RO DIMM VRD1 voltage >> +in3_input mili Volt RO DIMM VRD2 voltage >> +in4_input mili Volt RO Maximum voltage of DIMM VRD1 and VRD2 > > drop; reported individually. > will drop as it is "virtual" attr. >> +in5_input mili Volt RO RCA VRD voltage >> +cur1_input mili Ampere RO Core VRD current >> +cur2_input mili Ampere RO SoC VRD current >> +cur3_input mili Ampere RO DIMM VRD1 current >> +cur4_input mili Ampere RO DIMM VRD2 current >> +cur5_input mili Ampere RO RCA VRD current >> +power1_input nano Wat RO Core VRD power > > Expected scale is micro-Watt. > Will change in next version >> +power2_input nano Wat RO SoC VRD power >> +power3_input nano Wat RO DIMM VRD1 power >> +power4_input nano Wat RO DIMM VRD2 power >> +power5_input nano Wat RO CPU VRD power, total of SoC and Core VRD power > > drop > OK >> +power6_input nano Wat RO Total of DIMM VRD1 and VRD2 power > > drop > OK >> +power7_input nano Wat RO RCA VRD power >> +power8_input nano Wat RO Socket TDP > > Report as max attribute > Will try this in next version >> +=============== ============= ======= =============================================== >> + >> +Example:: >> + >> + # cat in0_input >> + 830 >> + # cat temp1_input >> + 37000 >> + # cat curr1_input >> + 9000 >> + # cat power5_input >> + 19500000 >> >
diff --git a/Documentation/hwmon/index.rst b/Documentation/hwmon/index.rst index 8d5a2df1ecb6..b48a980ed08b 100644 --- a/Documentation/hwmon/index.rst +++ b/Documentation/hwmon/index.rst @@ -164,6 +164,7 @@ Hardware Monitoring Kernel Drivers sis5595 sl28cpld smm665 + smpro-hwmon smsc47b397 smsc47m192 smsc47m1 diff --git a/Documentation/hwmon/smpro-hwmon.rst b/Documentation/hwmon/smpro-hwmon.rst new file mode 100644 index 000000000000..d546b90982e5 --- /dev/null +++ b/Documentation/hwmon/smpro-hwmon.rst @@ -0,0 +1,100 @@ +.. SPDX-License-Identifier: GPL-2.0-or-later + +Kernel driver Ampere(R)'s Altra(R) SMpro hwmon +============================================== + +Supported chips: + + * Ampere(R) Altra(R) + + Prefix: 'smpro' + + Reference: Altra SoC BMC Interface Specification + +Author: Thu Nguyen <thu@os.amperecomputing.com> + +Description +----------- +This driver supports hardware monitoring for Ampere(R) Altra(R) SoC's based on the +SMpro co-processor (SMpro). +The following sensor types are supported by the driver: + + * temperature + * voltage + * current + * power + +The SMpro interface provides the registers to query the various sensors and +their values which are then exported to userspace by this driver. + +Usage Notes +----------- + +SMpro hwmon driver creates two sysfs files for each sensor. + +* File ``<sensor_type><idx>_label`` reports the sensor label. +* File ``<sensor_type><idx>_input`` returns the sensor value. + +The sysfs files are allocated in the SMpro root fs folder. +There is one root folder for each SMpro instance. + +When the SoC is turned off, the driver is failed to read the registers. +It returns TIMEDOUT Error(-110) for the read sensors. + +Sysfs entries +------------- + +The following sysfs files are supported: + +* Ampere(R) Altra(R): + +=============== ============= ======= =============================================== +Name Unit Perm Description +temp1_input mili Celsius RO SoC temperature +temp2_input mili Celsius RO Highest temperature reported by the SoC VRDs +temp3_input mili Celsius RO Highest temperature reported by the DIMM VRDs +temp4_input mili Celsius RO Highest temperature reported by the Core VRDs +temp5_input mili Celsius RO Highest temperature of DIMM Channel 0 to 3 +temp6_input mili Celsius RO Temperature of DIMM0 on CH0 +temp7_input mili Celsius RO Temperature of DIMM0 on CH1 +temp8_input mili Celsius RO Temperature of DIMM0 on CH2 +temp9_input mili Celsius RO Temperature of DIMM0 on CH3 +temp10_input mili Celsius RO Highest temperature of DIMM Channel 4 to 7 +temp11_input mili Celsius RO Temperature of DIMM0 on CH4 +temp12_input mili Celsius RO Temperature of DIMM0 on CH5 +temp13_input mili Celsius RO Temperature of DIMM0 on CH6 +temp14_input mili Celsius RO Temperature of DIMM0 on CH7 +temp15_input mili Celsius RO MEM HOT Threshold +temp16_input mili Celsius RO SoC VRD HOT Threshold +temp17_input mili Celsius RO Highest temperature reported by the RCA VRD +in0_input mili Volt RO Core voltage +in1_input mili Volt RO SoC voltage +in2_input mili Volt RO DIMM VRD1 voltage +in3_input mili Volt RO DIMM VRD2 voltage +in4_input mili Volt RO Maximum voltage of DIMM VRD1 and VRD2 +in5_input mili Volt RO RCA VRD voltage +cur1_input mili Ampere RO Core VRD current +cur2_input mili Ampere RO SoC VRD current +cur3_input mili Ampere RO DIMM VRD1 current +cur4_input mili Ampere RO DIMM VRD2 current +cur5_input mili Ampere RO RCA VRD current +power1_input nano Wat RO Core VRD power +power2_input nano Wat RO SoC VRD power +power3_input nano Wat RO DIMM VRD1 power +power4_input nano Wat RO DIMM VRD2 power +power5_input nano Wat RO CPU VRD power, total of SoC and Core VRD power +power6_input nano Wat RO Total of DIMM VRD1 and VRD2 power +power7_input nano Wat RO RCA VRD power +power8_input nano Wat RO Socket TDP +=============== ============= ======= =============================================== + +Example:: + + # cat in0_input + 830 + # cat temp1_input + 37000 + # cat curr1_input + 9000 + # cat power5_input + 19500000