Depending on the system, the AP can be throttled in at least two different
ways - politely, where it's just asked to slow down a bit, and forcefully
using a hardware signal (like PROCHOT). In addition, the request for
throttling can come from multiple tasks.
This CL provides a single interface, specifying both the type of throttling
desired and the source of the throttling request.
For each type, any source can can start throttling, but all sources must
agree before it stops. The changes are protected by a mutex, so that
requests from multiple tasks don't interfere with each other.
BUG=chrome-os-partner:20739,chromium:287985,chromium:287983
BRANCH=ToT
TEST=manual
Build-time test:
cd src/platform/ec
make BOARD=falco runtests
Run-time test: Lower the temp thresholds, turn the fan off, and watch the
throttling turn off and on as things heat up. For example, on the EC
console:
> temps
PECI : 339 K = 66 C
ECInternal : 324 K = 51 C
G781Internal : 328 K = 55 C
G781External : 327 K = 54 C
> thermalset 0 341 343
sensor warn high halt fan_off fan_max name
0 341 343 383 333 363 PECI
1 0 0 0 0 0 ECInternal
2 0 0 0 0 0 G781Internal
3 0 0 0 0 0 G781External
>
> temps
PECI : 339 K = 66 C
ECInternal : 324 K = 51 C
G781Internal : 328 K = 55 C
G781External : 327 K = 54 C
>
> fanduty 0
Setting fan duty cycle to 0%
>
> apthrottle
AP throttling type 0 is off (0x00000000)
AP throttling type 1 is off (0x00000000)
>
[430.152000 thermal WARN]
[430.152233 event set 0x00020000]
[430.152497 event clear 0x00020000]
[430.152714 ACPI query = 18]
[430.152444 sci 0x00020000]
[430.153051 set AP throttling type 0 to on (0x00000001)]
> gpioget CPU_PROCHOT
0 CPU_PROCHOT
>
[436.153742 thermal HIGH]
[436.153979 set AP throttling type 1 to on (0x00000001)]
> gpioget CPU_PROCHOT
1* CPU_PROCHOT
> [441.155319 thermal no longer high]
[441.155587 set AP throttling type 1 to off (0x00000000)]
[442.155604 thermal HIGH]
[442.155841 set AP throttling type 1 to on (0x00000001)]
[446.156623 thermal no longer high]
[446.156890 set AP throttling type 1 to off (0x00000000)]
temps
PECI : 343 K = 70 C
ECInternal : 324 K = 51 C
G781Internal : 328 K = 55 C
G781External : 327 K = 54 C
>
[447.156827 thermal HIGH]
[447.157064 set AP throttling type 1 to on (0x00000001)]
apthrottle
AP throttling type 0 is on (0x00000001)
AP throttling type 1 is on (0x00000001)
> gpioget CPU_PROCHOT
1 CPU_PROCHOT
>
Now turn the fan back on:
> fanauto
>
[456.159306 thermal no longer high]
[456.159574 set AP throttling type 1 to off (0x00000000)]
> apthrottle
AP throttling type 0 is on (0x00000001)
AP throttling type 1 is off (0x00000000)
> temps
PECI : 341 K = 68 C
ECInternal : 324 K = 51 C
G781Internal : 328 K = 55 C
G781External : 327 K = 54 C
>
[473.163905 thermal no longer warn]
[473.164168 event set 0x00040000]
[473.164453 event clear 0x00040000]
[473.164670 ACPI query = 19]
[473.164379 sci 0x00040000]
[473.164987 set AP throttling type 0 to off (0x00000000)]
temps
PECI : 340 K = 67 C
ECInternal : 324 K = 51 C
G781Internal : 328 K = 55 C
G781External : 327 K = 54 C
>
> apthrottle
AP throttling type 0 is off (0x00000000)
AP throttling type 1 is off (0x00000000)
>
Change-Id: I9ee1491a637d7766395c71e57483fbd9177ea554
Signed-off-by: Bill Richardson <wfrichar@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/168802
Problems with existing thermal control loop:
* Not multi-board friendly. thermal.c only supports Link and needs
refactoring. Temp thresholds and fan speeds are hard-coded.
* Only the PECI temp is used to determine the fan speed. Other temp sensors
are ignored.
* Has confusing data structures. Values in the CPU temp thresholds array mix
ACPI thresholds with fan step values.
With this change, the thermal task monitors all temp sensors in order to
perform two completely independent functions:
Function one: Determine if the host needs to be throttled by or informed of
any thermal events.
For thermal events, each temp sensor will have three threshold levels.
TEMP_HOST_WARN
* When any sensor goes above this level, host_throttle_cpu(1) will be called
to ask the CPU to slow itself down.
* When all sensors drop below this level, host_throttle_cpu(0) will be called.
* Exactly AT this level, nothing happens (this provides hysteresis).
TEMP_HOST_HIGH
* When any sensor goes above this level, chipset_throttle_cpu(1) will be
called to slow the CPU down whether it wants to or not.
* When all sensors drop below this level, chipset_throttle_cpu(0) will be
called.
* Exactly AT this level, nothing happens (this provides hysteresis).
TEMP_HOST_SHUTDOWN
* When any sensor is above this level, chipset_force_shutdown() will be
called to halt the CPU.
* Nothing turns the CPU back on again - the user just has to wait for things
to cool off. Pressing the power button too soon will just trigger shutdown
again as soon as the EC can read the host temp.
Function two: Determine the amount of fan cooling needed
For fan cooling, each temp sensor will have two levels.
TEMP_FAN_OFF
* At or below this temperature, no active cooling is needed.
TEMP_FAN_MAX
* At or above this temperature, active cooling should be running at maximum.
The highest level of all temp sensors will be used to request the amount of
active cooling needed. The function pwm_fan_percent_to_rpm() is invoked to
convert the amount of cooling to the target fan RPM.
The default pwm_fan_percent_to_rpm() function converts smoothly between the
configured CONFIG_PWM_FAN_RPM_MIN and CONFIG_PWM_FAN_RPM_MAX for percentages
between 1 and 100. 0% means "off".
The default function probably provide the smoothest and quietest behavior,
but individual boards can provide their own pwm_fan_percent_to_rpm() to
implement whatever curves, hysteresis, feedback, or other hackery they wish.
BUG=chrome-os-partner:20805
BRANCH=none
TEST=manual
Compile-time test with
make BOARD=falco runtests
On the EC console, the existing fan commands should work correctly:
faninfo - display the fan state
fanduty NUM - force the fan PWM to the specified percentage (0-100)
fanset RPM - force the fan to the specified RPM
fanset NUM% - force the fan to the specified percentage (0-100) between
its configured minimum and maximum speeds from board.h
(CONFIG_PWM_FAN_RPM_MIN and CONFIG_PWM_FAN_RPM_MAX)
fanauto - let the EC control the fan automatically
You can test the default pwm_fan_percent_to_rpm() with
fanset 1%
faninfo
The fan should be turning at CONFIG_PWM_FAN_RPM_MIN. Let the EC control it
automatically again with
fanauto
Also on the EC console, the thermal settings can be examined or changed:
> temps
PECI : 327 K = 54 C
ECInternal : 320 K = 47 C
G781Internal : 319 K = 46 C
G781External : 318 K = 45 C
>
> thermalget
sensor warn high shutdown fan_off fan_max name
0 373 387 383 333 363 PECI
1 0 0 0 0 0 ECInternal
2 0 0 0 0 0 G781Internal
3 0 0 0 0 0 G781External
>
> help thermalset
Usage: thermalset sensor warn [high [shutdown [fan_off [fan_max]]]]
set thermal parameters (-1 to skip)
>
> thermalset 2 -1 -1 999
sensor warn high shutdown fan_off fan_max name
0 373 387 383 333 363 PECI
1 0 0 0 0 0 ECInternal
2 0 0 999 0 0 G781Internal
3 0 0 0 0 0 G781External
>
From the host, ectool can be used to get and set these parameters with
nearly identical commands:
ectool thermalget
ectool thermalset 2 -1 -1 999
Change-Id: Idb27977278f766826045fb7d41929953ec6b1cca
Signed-off-by: Bill Richardson <wfrichar@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/66688
Reviewed-by: Randall Spangler <rspangler@chromium.org>
This removes all tasks defined in board tasklist and changes syntax to
CONFIG_TEST_TASK_LIST and TASK_TEST.
BUG=chrome-os-partner:18598
TEST=None
BRANCH=None
Change-Id: Ie56c8edcb1dbf0ba0d0426ffce2a525594602a91
Signed-off-by: Vic Yang <victoryang@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/47738
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
Rename tasks
TICK -> HOOKS
The hooks task handles more than just the TICK hook now.
X86POWER -> CHIPSET
GAIAPOWER -> CHIPSET
Kinda kludgy that the name of the task controls which chipset source gets
included. Change this to a CONFIG_CHIPSET_{X86,GAIA} #define to make it
easier to support future chipsets. Also, rename the task function to
chipset_task() so ec.tasklist is chipset-agnostic.
No code changes, just renaming constants and functions.
BUG=none
BRANCH=none
TEST=build bds,link,daisy,snow,spring
Change-Id: I163ce1cd27b2d8d030d42bb1f7eb46b880c244fb
Signed-off-by: Randall Spangler <rspangler@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/45805
This reduces memory / code size, and gets rid of ifdefs in temp_sensor.c.
BUG=chrome-os-partner:15714
BRANCH=none
TEST=boot system and run 'ectool temps all' every few seconds
- ectool temps all
The numbers should update over time.
Change-Id: Idaac7e6e4cbc1d6689f5d3b607c623a5cc536a4f
Signed-off-by: Randall Spangler <rspangler@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/36940
Increase stack size slightly for vboot hash task since the vboot
SHA256 function allocates ~300 bytes of stack data. Reduce stack size
for watchdog, power LED, and a few other tasks with simple call trees
where we can be sure an error path isn't going to blow past the
reduced stack.
This frees up ~1KB of RAM on STM32.
BUG=chrome-os-partner:13814
BRANCH=all
TEST=boot system; shmem should show more unused RAM; taskinfo should show
tasks still have unused stack
Change-Id: I47d6b77564a0180d15d86667cc0566a8919b776e
Signed-off-by: Randall Spangler <rspangler@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/32608
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
