From ba9c8dd3c22275e46feef429f343b85e9cf3924c Mon Sep 17 00:00:00 2001 From: Dan Williams Date: Mon, 22 Aug 2016 19:28:37 -0700 Subject: acpi, nfit: add dimm device notification support 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 Tested-by: Toshi Kani Reviewed-by: Vishal Verma Acked-by: Rafael J. Wysocki Reviewed-by: Toshi Kani Signed-off-by: Dan Williams --- drivers/acpi/nfit/nfit.h | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'drivers/acpi/nfit/nfit.h') diff --git a/drivers/acpi/nfit/nfit.h b/drivers/acpi/nfit/nfit.h index 52370347fb0e..13195824778c 100644 --- a/drivers/acpi/nfit/nfit.h +++ b/drivers/acpi/nfit/nfit.h @@ -82,6 +82,10 @@ enum nfit_root_notifiers { NFIT_NOTIFY_UPDATE = 0x80, }; +enum nfit_dimm_notifiers { + NFIT_NOTIFY_DIMM_HEALTH = 0x81, +}; + struct nfit_spa { struct list_head list; struct nd_region *nd_region; @@ -128,6 +132,7 @@ struct nfit_mem { struct acpi_nfit_system_address *spa_bdw; struct acpi_nfit_interleave *idt_dcr; struct acpi_nfit_interleave *idt_bdw; + struct kernfs_node *flags_attr; struct nfit_flush *nfit_flush; struct list_head list; struct acpi_device *adev; -- cgit v1.2.1