diff options
author | Wu Hao <hao.wu@intel.com> | 2019-10-14 13:42:02 +0800 |
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committer | Moritz Fischer <mdf@kernel.org> | 2019-10-16 19:18:27 -0700 |
commit | 4284c65a9fda9d31f45209062f1b7f9bb438fc04 (patch) | |
tree | 843062eb4dff213196f3e45fa8e4b39eb348918c /Documentation/ABI/testing | |
parent | 214be7470e5fb0f3b1e228df376397c3da17638c (diff) | |
download | linux-4284c65a9fda9d31f45209062f1b7f9bb438fc04.tar.bz2 |
fpga: dfl: fme: add thermal management support
This patch adds support to thermal management private feature for DFL
FPGA Management Engine (FME). This private feature driver registers
a hwmon for thermal/temperature monitoring (hwmon temp1_input).
If hardware automatic throttling is supported by this hardware, then
driver also exposes sysfs interfaces under hwmon for thresholds
(temp1_max/ crit/ emergency), threshold alarms (temp1_max_alarm/
temp1_crit_alarm) and throttling policy (temp1_max_policy).
Signed-off-by: Luwei Kang <luwei.kang@intel.com>
Signed-off-by: Russ Weight <russell.h.weight@intel.com>
Signed-off-by: Xu Yilun <yilun.xu@intel.com>
Signed-off-by: Wu Hao <hao.wu@intel.com>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Moritz Fischer <mdf@kernel.org>
Signed-off-by: Moritz Fischer <mdf@kernel.org>
Diffstat (limited to 'Documentation/ABI/testing')
-rw-r--r-- | Documentation/ABI/testing/sysfs-platform-dfl-fme | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-platform-dfl-fme b/Documentation/ABI/testing/sysfs-platform-dfl-fme index 72634d3ae4f4..8eb6d03e06e7 100644 --- a/Documentation/ABI/testing/sysfs-platform-dfl-fme +++ b/Documentation/ABI/testing/sysfs-platform-dfl-fme @@ -106,3 +106,67 @@ KernelVersion: 5.4 Contact: Wu Hao <hao.wu@intel.com> Description: Read-only. Read this file to get the second error detected by hardware. + +What: /sys/bus/platform/devices/dfl-fme.0/hwmon/hwmonX/name +Date: October 2019 +KernelVersion: 5.5 +Contact: Wu Hao <hao.wu@intel.com> +Description: Read-Only. Read this file to get the name of hwmon device, it + supports values: + 'dfl_fme_thermal' - thermal hwmon device name + +What: /sys/bus/platform/devices/dfl-fme.0/hwmon/hwmonX/temp1_input +Date: October 2019 +KernelVersion: 5.5 +Contact: Wu Hao <hao.wu@intel.com> +Description: Read-Only. It returns FPGA device temperature in millidegrees + Celsius. + +What: /sys/bus/platform/devices/dfl-fme.0/hwmon/hwmonX/temp1_max +Date: October 2019 +KernelVersion: 5.5 +Contact: Wu Hao <hao.wu@intel.com> +Description: Read-Only. It returns hardware threshold1 temperature in + millidegrees Celsius. If temperature rises at or above this + threshold, hardware starts 50% or 90% throttling (see + 'temp1_max_policy'). + +What: /sys/bus/platform/devices/dfl-fme.0/hwmon/hwmonX/temp1_crit +Date: October 2019 +KernelVersion: 5.5 +Contact: Wu Hao <hao.wu@intel.com> +Description: Read-Only. It returns hardware threshold2 temperature in + millidegrees Celsius. If temperature rises at or above this + threshold, hardware starts 100% throttling. + +What: /sys/bus/platform/devices/dfl-fme.0/hwmon/hwmonX/temp1_emergency +Date: October 2019 +KernelVersion: 5.5 +Contact: Wu Hao <hao.wu@intel.com> +Description: Read-Only. It returns hardware trip threshold temperature in + millidegrees Celsius. If temperature rises at or above this + threshold, a fatal event will be triggered to board management + controller (BMC) to shutdown FPGA. + +What: /sys/bus/platform/devices/dfl-fme.0/hwmon/hwmonX/temp1_max_alarm +Date: October 2019 +KernelVersion: 5.5 +Contact: Wu Hao <hao.wu@intel.com> +Description: Read-only. It returns 1 if temperature is currently at or above + hardware threshold1 (see 'temp1_max'), otherwise 0. + +What: /sys/bus/platform/devices/dfl-fme.0/hwmon/hwmonX/temp1_crit_alarm +Date: October 2019 +KernelVersion: 5.5 +Contact: Wu Hao <hao.wu@intel.com> +Description: Read-only. It returns 1 if temperature is currently at or above + hardware threshold2 (see 'temp1_crit'), otherwise 0. + +What: /sys/bus/platform/devices/dfl-fme.0/hwmon/hwmonX/temp1_max_policy +Date: October 2019 +KernelVersion: 5.5 +Contact: Wu Hao <hao.wu@intel.com> +Description: Read-Only. Read this file to get the policy of hardware threshold1 + (see 'temp1_max'). It only supports two values (policies): + 0 - AP2 state (90% throttling) + 1 - AP1 state (50% throttling) |