Commit 56b47fe6 authored by Toshi Kani's avatar Toshi Kani Committed by Dan Williams
Browse files

acpi/nfit: Add support of NVDIMM memory error notification in ACPI 6.2 

ACPI 6.2 defines a new ACPI notification value to NVDIMM Root Device
in Table 5-169.

 0x81 Unconsumed Uncorrectable Memory Error Detected
      Used to pro-actively notify OSPM of uncorrectable memory errors
      detected (for example a memory scrubbing engine that continuously
      scans the NVDIMMs memory). This is an optional notification. Only
      locations that were mapped in to SPA by the platform will generate
      a notification.

Add support of this notification value by initiating an ARS scan. This
will find new error locations and add their badblocks information.

Link: http://www.uefi.org/sites/default/files/resources/ACPI_6_2.pdf


Signed-off-by: default avatarToshi Kani <toshi.kani@hpe.com>
Cc: Rafael J. Wysocki <rjw@rjwysocki.net>
Cc: Vishal Verma <vishal.l.verma@intel.com>
Cc: Linda Knippers <linda.knippers@hpe.com>
Signed-off-by: default avatarDan Williams <dan.j.williams@intel.com>
parent 975750a9

drivers/acpi/nfit/core.c

+22 −6
Original line number Diff line number Diff line
@@ -3016,7 +3016,7 @@ static int acpi_nfit_remove(struct acpi_device *adev) 
	return 0;

}



void __acpi_nfit_notify(struct device *dev, acpi_handle handle, u32 event)

static void acpi_nfit_update_notify(struct device *dev, acpi_handle handle)

{

	struct acpi_nfit_desc *acpi_desc = dev_get_drvdata(dev);

	struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER, NULL };
@@ -3024,11 +3024,6 @@ void __acpi_nfit_notify(struct device *dev, acpi_handle handle, u32 event) 
	acpi_status status;

	int ret;



	dev_dbg(dev, "%s: event: %d\n", __func__, event);



	if (event != NFIT_NOTIFY_UPDATE)

		return;



	if (!dev->driver) {

		/* dev->driver may be null if we're being removed */

		dev_dbg(dev, "%s: no driver found for dev\n", __func__);
@@ -3065,6 +3060,27 @@ void __acpi_nfit_notify(struct device *dev, acpi_handle handle, u32 event) 
		dev_err(dev, "Invalid _FIT\n");

	kfree(buf.pointer);

}



static void acpi_nfit_uc_error_notify(struct device *dev, acpi_handle handle)

{

	struct acpi_nfit_desc *acpi_desc = dev_get_drvdata(dev);



	acpi_nfit_ars_rescan(acpi_desc);

}



void __acpi_nfit_notify(struct device *dev, acpi_handle handle, u32 event)

{

	dev_dbg(dev, "%s: event: 0x%x\n", __func__, event);



	switch (event) {

	case NFIT_NOTIFY_UPDATE:

		return acpi_nfit_update_notify(dev, handle);

	case NFIT_NOTIFY_UC_MEMORY_ERROR:

		return acpi_nfit_uc_error_notify(dev, handle);

	default:

		return;

	}

}

EXPORT_SYMBOL_GPL(__acpi_nfit_notify);



static void acpi_nfit_notify(struct acpi_device *adev, u32 event)

drivers/acpi/nfit/nfit.h

+1 −0
Original line number Diff line number Diff line
@@ -79,6 +79,7 @@ enum { 


enum nfit_root_notifiers {

	NFIT_NOTIFY_UPDATE = 0x80,

	NFIT_NOTIFY_UC_MEMORY_ERROR = 0x81,

};



enum nfit_dimm_notifiers {

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