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: Toshi Kani <toshi.k...@hpe.com>
Cc: Dan Williams <dan.j.willi...@intel.com>
Cc: Rafael J. Wysocki <r...@rjwysocki.net>
Cc: Vishal Verma <vishal.l.ve...@intel.com>
Cc: Linda Knippers <linda.knipp...@hpe.com>
---
drivers/acpi/nfit/core.c | 28 ++++++++++++++++++++++------
drivers/acpi/nfit/nfit.h | 1 +
2 files changed, 23 insertions(+), 6 deletions(-)
diff --git a/drivers/acpi/nfit/core.c b/drivers/acpi/nfit/core.c
index 656acb5..cc22778 100644
--- a/drivers/acpi/nfit/core.c
+++ b/drivers/acpi/nfit/core.c
@@ -2967,7 +2967,7 @@ 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 };
@@ -2975,11 +2975,6 @@ 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__);
@@ -3016,6 +3011,27 @@ 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)
diff --git a/drivers/acpi/nfit/nfit.h b/drivers/acpi/nfit/nfit.h
index 58fb7d6..6cf9d21 100644
--- a/drivers/acpi/nfit/nfit.h
+++ b/drivers/acpi/nfit/nfit.h
@@ -80,6 +80,7 @@ enum {
enum nfit_root_notifiers {
NFIT_NOTIFY_UPDATE = 0x80,
+ NFIT_NOTIFY_UC_MEMORY_ERROR = 0x81,
};
enum nfit_dimm_notifiers {
