Commit b0f64c80 authored by Quan Nguyen's avatar Quan Nguyen Committed by Greg Kroah-Hartman
Browse files

misc: smpro-errmon: Add DIMM 2x Refresh rate event 



In high temperature condition, JEDEC spec requires memory controller to
double the refresh rate. This commit adds event_dimm_2x_refresh sysfs
to report that events for all memory channels.

Signed-off-by: default avatarQuan Nguyen <quan@os.amperecomputing.com>
Link: https://lore.kernel.org/r/20230310083416.3670980-2-quan@os.amperecomputing.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent f0312cbd

Documentation/ABI/testing/sysfs-bus-platform-devices-ampere-smpro

+6 −3
Original line number Diff line number Diff line
@@ -234,8 +234,8 @@ Description: 
		For details, see section `5.10 RAS Internal Error Register Definitions,

		Altra Family Soc BMC Interface Specification`.



What:		/sys/bus/platform/devices/smpro-errmon.*/event_[vrd_warn_fault|vrd_hot|dimm_hot]

KernelVersion:	6.1

What:		/sys/bus/platform/devices/smpro-errmon.*/event_[vrd_warn_fault|vrd_hot|dimm_hot|dimm_2x_refresh]

KernelVersion:	6.1 (event_[vrd_warn_fault|vrd_hot|dimm_hot]), 6.4 (event_dimm_2x_refresh)

Contact:	Quan Nguyen <quan@os.amperecomputing.com>

Description:

		(RO) Contains the detail information in case of VRD/DIMM warning/hot events
@@ -258,8 +258,11 @@ Description: 
		+---------------+---------------------------------------------------------------+---------------------+

		| DIMM HOT      | /sys/bus/platform/devices/smpro-errmon.*/event_dimm_hot       | DIMM Hot            |

		+---------------+---------------------------------------------------------------+---------------------+

		| DIMM 2X       | /sys/bus/platform/devices/smpro-errmon.*/event_dimm_2x_refresh| DIMM 2x refresh rate|

		| REFRESH RATE  |                                                               | event in high temp  |

		+---------------+---------------------------------------------------------------+---------------------+



		For more details, see section `5.7 GPI Status Registers,

		For more details, see section `5.7 GPI Status Registers and 5.9 Memory Error Register Definitions,

		Altra Family Soc BMC Interface Specification`.



What:		/sys/bus/platform/devices/smpro-misc.*/boot_progress

drivers/misc/smpro-errmon.c

+5 −0
Original line number Diff line number Diff line
@@ -67,6 +67,7 @@ 
#define VRD_WARN_FAULT_EVENT_DATA	0x78

#define VRD_HOT_EVENT_DATA		0x79

#define DIMM_HOT_EVENT_DATA		0x7A

#define DIMM_2X_REFRESH_EVENT_DATA	0x96



#define MAX_READ_BLOCK_LENGTH	48
@@ -190,6 +191,7 @@ enum EVENT_TYPES { 
	VRD_WARN_FAULT_EVENT,

	VRD_HOT_EVENT,

	DIMM_HOT_EVENT,

	DIMM_2X_REFRESH_EVENT,

	NUM_EVENTS_TYPE,

};
@@ -198,6 +200,7 @@ static u8 smpro_event_table[NUM_EVENTS_TYPE] = { 
	VRD_WARN_FAULT_EVENT_DATA,

	VRD_HOT_EVENT_DATA,

	DIMM_HOT_EVENT_DATA,

	DIMM_2X_REFRESH_EVENT_DATA,

};



static ssize_t smpro_event_data_read(struct device *dev,
@@ -463,6 +466,7 @@ static DEVICE_ATTR_RO(warn_pmpro); 
EVENT_RO(vrd_warn_fault, VRD_WARN_FAULT_EVENT);

EVENT_RO(vrd_hot, VRD_HOT_EVENT);

EVENT_RO(dimm_hot, DIMM_HOT_EVENT);

EVENT_RO(dimm_2x_refresh, DIMM_2X_REFRESH_EVENT);



static struct attribute *smpro_errmon_attrs[] = {

	&dev_attr_overflow_core_ce.attr,
@@ -488,6 +492,7 @@ static struct attribute *smpro_errmon_attrs[] = { 
	&dev_attr_event_vrd_warn_fault.attr,

	&dev_attr_event_vrd_hot.attr,

	&dev_attr_event_dimm_hot.attr,

	&dev_attr_event_dimm_2x_refresh.attr,

	NULL

};