Commit 4b3a359d authored by Zhang Zekun's avatar Zhang Zekun
Browse files

soc: hisilicon: hisi_hbmdev: Add hbm acls repair and query methods 

hulk inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I8CCP5



----------------------------------

Hbm memory device add support for acls hot repair. The patch
add two methods for userpace:
- query a paddr if it support acls repair
- repair a paddr in hbm memory device

The feature of ACLS hot repair can help to fix a memory error
from userspace by passing through the error physical address
to HBM hardware.

Signed-off-by: default avatarZhang Zekun <zhangzekun11@huawei.com>
parent c07b46e6

drivers/soc/hisilicon/Kconfig

+10 −0
Original line number Diff line number Diff line
@@ -44,4 +44,14 @@ config HISI_HBMCACHE 
	  To compile the driver as a module, choose M here:

	  the module will be called hisi_hbmcache.



config HISI_HBMDEV_ACLS

	bool "Add support for HISI ACLS repair"

	depends on HISI_HBMDEV

	help

	  Add ACLS support for hbm device, which can be used to query and

	  repair hardware error in HBM devices. This feature need to work with

	  hardware firmwares.



	  If not sure say no.



endmenu

drivers/soc/hisilicon/hisi_hbmdev.c

+134 −0
Original line number Diff line number Diff line
@@ -11,6 +11,7 @@ 
#include <linux/node.h>

#include <linux/arch_topology.h>

#include <linux/memory_hotplug.h>

#include <linux/mm.h>



#include "hisi_internal.h"
@@ -25,6 +26,9 @@ struct cdev_node { 
struct memory_dev {

	struct kobject *memdev_kobj;

	struct kobject *topo_kobj;

#ifdef CONFIG_HISI_HBMDEV_ACLS

	struct kobject *acls_kobj;

#endif

	struct cdev_node cdev_list;

	nodemask_t cluster_cpumask[MAX_NUMNODES];

};
@@ -85,6 +89,134 @@ static void memory_topo_init(void) 
		kobject_put(mdev->topo_kobj);

}



#ifdef CONFIG_HISI_HBMDEV_ACLS

static struct acpi_device *paddr_to_acpi_device(u64 paddr)

{

	unsigned long pfn;

	int nid;



	pfn = __phys_to_pfn(paddr);

	if (!pfn_valid(pfn))

		return NULL;



	nid = pfn_to_nid(pfn);

	if (nid < 0 && nid >= MAX_NUMNODES)

		return NULL;



	return hotplug_mdev[nid];

}



static ssize_t acls_query_store(struct kobject *kobj,

				struct kobj_attribute *attr,

				const char *buf, size_t count)

{

	struct acpi_object_list arg_list;

	struct acpi_device *adev;

	union acpi_object obj;

	acpi_status status;

	u64 paddr, res;



	if (kstrtoull(buf, 16, &paddr))

		return -EINVAL;



	adev = paddr_to_acpi_device(paddr);

	if (!adev)

		return -EINVAL;



	obj.type = ACPI_TYPE_INTEGER;

	obj.integer.value = paddr;

	arg_list.count = 1;

	arg_list.pointer = &obj;



	status = acpi_evaluate_integer(adev->handle, "AQRY", &arg_list, &res);

	if (ACPI_FAILURE(status))

		return -ENODEV;



	/* AQRY will return a positive error code to represent error status */

	if (IS_ERR_VALUE(-res))

		return -res;

	else if (res)

		return -ENODEV;



	return count;

}



static struct kobj_attribute acls_query_store_attribute =

	__ATTR(acls_query, 0200, NULL, acls_query_store);



static ssize_t acls_repair_store(struct kobject *kobj,

				struct kobj_attribute *attr,

				const char *buf, size_t count)

{

	struct acpi_object_list arg_list;

	struct acpi_device *adev;

	union acpi_object obj;

	acpi_status status;

	u64 paddr, res;



	if (kstrtoull(buf, 16, &paddr))

		return -EINVAL;



	adev = paddr_to_acpi_device(paddr);

	if (!adev)

		return -EINVAL;



	obj.type = ACPI_TYPE_INTEGER;

	obj.integer.value = paddr;

	arg_list.count = 1;

	arg_list.pointer = &obj;



	status = acpi_evaluate_integer(adev->handle, "AREP", &arg_list, &res);

	if (ACPI_FAILURE(status))

		return -ENODEV;



	/* AREP will return a positive error code to represent error status */

	if (IS_ERR_VALUE(-res))

		return -res;

	else if (res)

		return -ENODEV;



	return count;

}

static struct kobj_attribute acls_repair_store_attribute =

	__ATTR(acls_repair, 0200, NULL, acls_repair_store);



static struct attribute *acls_attrs[] = {

	&acls_query_store_attribute.attr,

	&acls_repair_store_attribute.attr,

	NULL,

};



static struct attribute_group acls_attr_group = {

	.attrs = acls_attrs,

};



static void acls_init(void)

{

	int ret = -ENOMEM;



	mdev->acls_kobj = kobject_create_and_add("acls", mdev->memdev_kobj);

	if (!mdev->acls_kobj)

		goto out;



	ret = sysfs_create_group(mdev->acls_kobj, &acls_attr_group);

	if (ret)

		kobject_put(mdev->acls_kobj);



out:

	if (ret)

		pr_err("ACLS hot repair is not enabled\n");

}



static void acls_remove(void)

{

	kobject_put(mdev->acls_kobj);

}

#else

static void acls_init(void) {}

static void acls_remove(void) {}

#endif



static int get_pxm(struct acpi_device *acpi_device, void *arg)

{

	acpi_handle handle = acpi_device->handle;
@@ -284,6 +416,7 @@ static int __init mdev_init(void) 
	}



	memory_topo_init();

	acls_init();

	return ret;

}

module_init(mdev_init);
@@ -293,6 +426,7 @@ static void __exit mdev_exit(void) 
	container_remove();

	kobject_put(mdev->memdev_kobj);

	kobject_put(mdev->topo_kobj);

	acls_remove();

	kfree(mdev);

}

module_exit(mdev_exit);