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acpi, nfit: add dimm device notification support

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Per "ACPI 6.1 Section 9.20.3" NVDIMM devices, children of the ACPI0012
NVDIMM Root device, can receive health event notifications.

Given that these devices are precluded from registering a notification
handler via acpi_driver.acpi_device_ops (due to no _HID), we use
acpi_install_notify_handler() directly.  The registered handler,
acpi_nvdimm_notify(), triggers a poll(2) event on the nmemX/nfit/flags
sysfs attribute when a health event notification is received.

Cc: Rafael J. Wysocki <[email protected]>
Tested-by: Toshi Kani <[email protected]>
Reviewed-by: Vishal Verma <[email protected]>
Acked-by: Rafael J. Wysocki <[email protected]>
Reviewed-by: Toshi Kani <[email protected]>
Signed-off-by: Dan Williams <[email protected]>
This commit is contained in:
Dan Williams 2016-08-22 19:28:37 -07:00
commit ba9c8dd3c2
4 changed files with 103 additions and 4 deletions
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6
drivers/nvdimm/dimm_devs.c
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@ -263,6 +263,12 @@ const char *nvdimm_name(struct nvdimm *nvdimm)
}
EXPORT_SYMBOL_GPL(nvdimm_name);
struct kobject *nvdimm_kobj(struct nvdimm *nvdimm)
{
return &nvdimm->dev.kobj;
}
EXPORT_SYMBOL_GPL(nvdimm_kobj);
unsigned long nvdimm_cmd_mask(struct nvdimm *nvdimm)
{
return nvdimm->cmd_mask;